text: /************************************************************************
   * s2io.c: A Linux PCI-X Ethernet driver for Neterion 10GbE Server NIC
   * Copyright(c) 2002-2010 Exar Corp.
   *
   * This software may be used and distributed according to the terms of
   * the GNU General Public License (GPL), incorporated herein by reference.
   * Drivers based on or derived from this code fall under the GPL and must
   * retain the authorship, copyright and license notice.  This file is not
   * a complete program and may only be used when the entire operating
   * system is licensed under the GPL.
   * See the file COPYING in this distribution for more information.
   *
   * Credits:
   * Jeff Garzik		: For pointing out the improper error condition
   *			  check in the s2io_xmit routine and also some
   *			  issues in the Tx watch dog function. Also for
   *			  patiently answering all those innumerable
   *			  questions regaring the 2.6 porting issues.
   * Stephen Hemminger	: Providing proper 2.6 porting mechanism for some
   *			  macros available only in 2.6 Kernel.
   * Francois Romieu	: For pointing out all code part that were
   *			  deprecated and also styling related comments.
   * Grant Grundler	: For helping me get rid of some Architecture
   *			  dependent code.
   * Christopher Hellwig	: Some more 2.6 specific issues in the driver.
   *
   * The module loadable parameters that are supported by the driver and a brief
   * explanation of all the variables.
   *
   * rx_ring_num : This can be used to program the number of receive rings used
   * in the driver.
   * rx_ring_sz: This defines the number of receive blocks each ring can have.
   *     This is also an array of size 8.
   * rx_ring_mode: This defines the operation mode of all 8 rings. The valid
   *		values are 1, 2.
   * tx_fifo_num: This defines the number of Tx FIFOs thats used int the driver.
   * tx_fifo_len: This too is an array of 8. Each element defines the number of
   * Tx descriptors that can be associated with each corresponding FIFO.
   * intr_type: This defines the type of interrupt. The values can be 0(INTA),
   *     2(MSI_X). Default value is '2(MSI_X)'
   * lro_max_pkts: This parameter defines maximum number of packets can be
   *     aggregated as a single large packet
   * napi: This parameter used to enable/disable NAPI (polling Rx)
   *     Possible values '1' for enable and '0' for disable. Default is '1'
   * vlan_tag_strip: This can be used to enable or disable vlan stripping.
   *                 Possible values '1' for enable , '0' for disable.
   *                 Default is '2' - which means disable in promisc mode
   *                 and enable in non-promiscuous mode.
   * multiq: This parameter used to enable/disable MULTIQUEUE support.
   *      Possible values '1' for enable and '0' for disable. Default is '0'
   ************************************************************************/
  
  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  
  #include <linux/module.h>
  #include <linux/types.h>
  #include <linux/errno.h>
  #include <linux/ioport.h>
  #include <linux/pci.h>
  #include <linux/dma-mapping.h>
  #include <linux/kernel.h>
  #include <linux/netdevice.h>
  #include <linux/etherdevice.h>
  #include <linux/mdio.h>
  #include <linux/skbuff.h>
  #include <linux/init.h>
  #include <linux/delay.h>
  #include <linux/stddef.h>
  #include <linux/ioctl.h>
  #include <linux/timex.h>
  #include <linux/ethtool.h>
  #include <linux/workqueue.h>
  #include <linux/if_vlan.h>
  #include <linux/ip.h>
  #include <linux/tcp.h>
  #include <linux/uaccess.h>
  #include <linux/io.h>
  #include <linux/io-64-nonatomic-lo-hi.h>
  #include <linux/slab.h>
  #include <linux/prefetch.h>
  #include <net/tcp.h>
  #include <net/checksum.h>
  
  #include <asm/div64.h>
  #include <asm/irq.h>
  
  /* local include */
  #include "s2io.h"
  #include "s2io-regs.h"
  
  #define DRV_VERSION "2.0.26.28"
  
  /* S2io Driver name & version. */
  static const char s2io_driver_name[] = "Neterion";
  static const char s2io_driver_version[] = DRV_VERSION;
  
  static const int rxd_size[2] = {32, 48};
  static const int rxd_count[2] = {127, 85};
  
  static inline int RXD_IS_UP2DT(struct RxD_t *rxdp)
  {
  	int ret;
  
  	ret = ((!(rxdp->Control_1 & RXD_OWN_XENA)) &&
  	       (GET_RXD_MARKER(rxdp->Control_2) != THE_RXD_MARK));
  
  	return ret;
  }
  
  /*
   * Cards with following subsystem_id have a link state indication
   * problem, 600B, 600C, 600D, 640B, 640C and 640D.
   * macro below identifies these cards given the subsystem_id.
   */
  #define CARDS_WITH_FAULTY_LINK_INDICATORS(dev_type, subid)		\
  	(dev_type == XFRAME_I_DEVICE) ?					\
  	((((subid >= 0x600B) && (subid <= 0x600D)) ||			\
  	  ((subid >= 0x640B) && (subid <= 0x640D))) ? 1 : 0) : 0
  
  #define LINK_IS_UP(val64) (!(val64 & (ADAPTER_STATUS_RMAC_REMOTE_FAULT | \
  				      ADAPTER_STATUS_RMAC_LOCAL_FAULT)))
  
  static inline int is_s2io_card_up(const struct s2io_nic *sp)
  {
  	return test_bit(__S2IO_STATE_CARD_UP, &sp->state);
  }
  
  /* Ethtool related variables and Macros. */
  static const char s2io_gstrings[][ETH_GSTRING_LEN] = {
  	"Register test\t(offline)",
  	"Eeprom test\t(offline)",
  	"Link test\t(online)",
  	"RLDRAM test\t(offline)",
  	"BIST Test\t(offline)"
  };
  
  static const char ethtool_xena_stats_keys[][ETH_GSTRING_LEN] = {
  	{"tmac_frms"},
  	{"tmac_data_octets"},
  	{"tmac_drop_frms"},
  	{"tmac_mcst_frms"},
  	{"tmac_bcst_frms"},
  	{"tmac_pause_ctrl_frms"},
  	{"tmac_ttl_octets"},
  	{"tmac_ucst_frms"},
  	{"tmac_nucst_frms"},
  	{"tmac_any_err_frms"},
  	{"tmac_ttl_less_fb_octets"},
  	{"tmac_vld_ip_octets"},
  	{"tmac_vld_ip"},
  	{"tmac_drop_ip"},
  	{"tmac_icmp"},
  	{"tmac_rst_tcp"},
  	{"tmac_tcp"},
  	{"tmac_udp"},
  	{"rmac_vld_frms"},
  	{"rmac_data_octets"},
  	{"rmac_fcs_err_frms"},
  	{"rmac_drop_frms"},
  	{"rmac_vld_mcst_frms"},
  	{"rmac_vld_bcst_frms"},
  	{"rmac_in_rng_len_err_frms"},
  	{"rmac_out_rng_len_err_frms"},
  	{"rmac_long_frms"},
  	{"rmac_pause_ctrl_frms"},
  	{"rmac_unsup_ctrl_frms"},
  	{"rmac_ttl_octets"},
  	{"rmac_accepted_ucst_frms"},
  	{"rmac_accepted_nucst_frms"},
  	{"rmac_discarded_frms"},
  	{"rmac_drop_events"},
  	{"rmac_ttl_less_fb_octets"},
  	{"rmac_ttl_frms"},
  	{"rmac_usized_frms"},
  	{"rmac_osized_frms"},
  	{"rmac_frag_frms"},
  	{"rmac_jabber_frms"},
  	{"rmac_ttl_64_frms"},
  	{"rmac_ttl_65_127_frms"},
  	{"rmac_ttl_128_255_frms"},
  	{"rmac_ttl_256_511_frms"},
  	{"rmac_ttl_512_1023_frms"},
  	{"rmac_ttl_1024_1518_frms"},
  	{"rmac_ip"},
  	{"rmac_ip_octets"},
  	{"rmac_hdr_err_ip"},
  	{"rmac_drop_ip"},
  	{"rmac_icmp"},
  	{"rmac_tcp"},
  	{"rmac_udp"},
  	{"rmac_err_drp_udp"},
  	{"rmac_xgmii_err_sym"},
  	{"rmac_frms_q0"},
  	{"rmac_frms_q1"},
  	{"rmac_frms_q2"},
  	{"rmac_frms_q3"},
  	{"rmac_frms_q4"},
  	{"rmac_frms_q5"},
  	{"rmac_frms_q6"},
  	{"rmac_frms_q7"},
  	{"rmac_full_q0"},
  	{"rmac_full_q1"},
  	{"rmac_full_q2"},
  	{"rmac_full_q3"},
  	{"rmac_full_q4"},
  	{"rmac_full_q5"},
  	{"rmac_full_q6"},
  	{"rmac_full_q7"},
  	{"rmac_pause_cnt"},
  	{"rmac_xgmii_data_err_cnt"},
  	{"rmac_xgmii_ctrl_err_cnt"},
  	{"rmac_accepted_ip"},
  	{"rmac_err_tcp"},
  	{"rd_req_cnt"},
  	{"new_rd_req_cnt"},
  	{"new_rd_req_rtry_cnt"},
  	{"rd_rtry_cnt"},
  	{"wr_rtry_rd_ack_cnt"},
  	{"wr_req_cnt"},
  	{"new_wr_req_cnt"},
  	{"new_wr_req_rtry_cnt"},
  	{"wr_rtry_cnt"},
  	{"wr_disc_cnt"},
  	{"rd_rtry_wr_ack_cnt"},
  	{"txp_wr_cnt"},
  	{"txd_rd_cnt"},
  	{"txd_wr_cnt"},
  	{"rxd_rd_cnt"},
  	{"rxd_wr_cnt"},
  	{"txf_rd_cnt"},
  	{"rxf_wr_cnt"}
  };
  
  static const char ethtool_enhanced_stats_keys[][ETH_GSTRING_LEN] = {
  	{"rmac_ttl_1519_4095_frms"},
  	{"rmac_ttl_4096_8191_frms"},
  	{"rmac_ttl_8192_max_frms"},
  	{"rmac_ttl_gt_max_frms"},
  	{"rmac_osized_alt_frms"},
  	{"rmac_jabber_alt_frms"},
  	{"rmac_gt_max_alt_frms"},
  	{"rmac_vlan_frms"},
  	{"rmac_len_discard"},
  	{"rmac_fcs_discard"},
  	{"rmac_pf_discard"},
  	{"rmac_da_discard"},
  	{"rmac_red_discard"},
  	{"rmac_rts_discard"},
  	{"rmac_ingm_full_discard"},
  	{"link_fault_cnt"}
  };
  
  static const char ethtool_driver_stats_keys[][ETH_GSTRING_LEN] = {
  	{"\n DRIVER STATISTICS"},
  	{"single_bit_ecc_errs"},
  	{"double_bit_ecc_errs"},
  	{"parity_err_cnt"},
  	{"serious_err_cnt"},
  	{"soft_reset_cnt"},
  	{"fifo_full_cnt"},
  	{"ring_0_full_cnt"},
  	{"ring_1_full_cnt"},
  	{"ring_2_full_cnt"},
  	{"ring_3_full_cnt"},
  	{"ring_4_full_cnt"},
  	{"ring_5_full_cnt"},
  	{"ring_6_full_cnt"},
  	{"ring_7_full_cnt"},
  	{"alarm_transceiver_temp_high"},
  	{"alarm_transceiver_temp_low"},
  	{"alarm_laser_bias_current_high"},
  	{"alarm_laser_bias_current_low"},
  	{"alarm_laser_output_power_high"},
  	{"alarm_laser_output_power_low"},
  	{"warn_transceiver_temp_high"},
  	{"warn_transceiver_temp_low"},
  	{"warn_laser_bias_current_high"},
  	{"warn_laser_bias_current_low"},
  	{"warn_laser_output_power_high"},
  	{"warn_laser_output_power_low"},
  	{"lro_aggregated_pkts"},
  	{"lro_flush_both_count"},
  	{"lro_out_of_sequence_pkts"},
  	{"lro_flush_due_to_max_pkts"},
  	{"lro_avg_aggr_pkts"},
  	{"mem_alloc_fail_cnt"},
  	{"pci_map_fail_cnt"},
  	{"watchdog_timer_cnt"},
  	{"mem_allocated"},
  	{"mem_freed"},
  	{"link_up_cnt"},
  	{"link_down_cnt"},
  	{"link_up_time"},
  	{"link_down_time"},
  	{"tx_tcode_buf_abort_cnt"},
  	{"tx_tcode_desc_abort_cnt"},
  	{"tx_tcode_parity_err_cnt"},
  	{"tx_tcode_link_loss_cnt"},
  	{"tx_tcode_list_proc_err_cnt"},
  	{"rx_tcode_parity_err_cnt"},
  	{"rx_tcode_abort_cnt"},
  	{"rx_tcode_parity_abort_cnt"},
  	{"rx_tcode_rda_fail_cnt"},
  	{"rx_tcode_unkn_prot_cnt"},
  	{"rx_tcode_fcs_err_cnt"},
  	{"rx_tcode_buf_size_err_cnt"},
  	{"rx_tcode_rxd_corrupt_cnt"},
  	{"rx_tcode_unkn_err_cnt"},
  	{"tda_err_cnt"},
  	{"pfc_err_cnt"},
  	{"pcc_err_cnt"},
  	{"tti_err_cnt"},
  	{"tpa_err_cnt"},
  	{"sm_err_cnt"},
  	{"lso_err_cnt"},
  	{"mac_tmac_err_cnt"},
  	{"mac_rmac_err_cnt"},
  	{"xgxs_txgxs_err_cnt"},
  	{"xgxs_rxgxs_err_cnt"},
  	{"rc_err_cnt"},
  	{"prc_pcix_err_cnt"},
  	{"rpa_err_cnt"},
  	{"rda_err_cnt"},
  	{"rti_err_cnt"},
  	{"mc_err_cnt"}
  };
  
  #define S2IO_XENA_STAT_LEN	ARRAY_SIZE(ethtool_xena_stats_keys)
  #define S2IO_ENHANCED_STAT_LEN	ARRAY_SIZE(ethtool_enhanced_stats_keys)
  #define S2IO_DRIVER_STAT_LEN	ARRAY_SIZE(ethtool_driver_stats_keys)
  
  #define XFRAME_I_STAT_LEN (S2IO_XENA_STAT_LEN + S2IO_DRIVER_STAT_LEN)
  #define XFRAME_II_STAT_LEN (XFRAME_I_STAT_LEN + S2IO_ENHANCED_STAT_LEN)
  
  #define XFRAME_I_STAT_STRINGS_LEN (XFRAME_I_STAT_LEN * ETH_GSTRING_LEN)
  #define XFRAME_II_STAT_STRINGS_LEN (XFRAME_II_STAT_LEN * ETH_GSTRING_LEN)
  
  #define S2IO_TEST_LEN	ARRAY_SIZE(s2io_gstrings)
  #define S2IO_STRINGS_LEN	(S2IO_TEST_LEN * ETH_GSTRING_LEN)
  
  /* copy mac addr to def_mac_addr array */
  static void do_s2io_copy_mac_addr(struct s2io_nic *sp, int offset, u64 mac_addr)
  {
  	sp->def_mac_addr[offset].mac_addr[5] = (u8) (mac_addr);
  	sp->def_mac_addr[offset].mac_addr[4] = (u8) (mac_addr >> 8);
  	sp->def_mac_addr[offset].mac_addr[3] = (u8) (mac_addr >> 16);
  	sp->def_mac_addr[offset].mac_addr[2] = (u8) (mac_addr >> 24);
  	sp->def_mac_addr[offset].mac_addr[1] = (u8) (mac_addr >> 32);
  	sp->def_mac_addr[offset].mac_addr[0] = (u8) (mac_addr >> 40);
  }
  
  /*
   * Constants to be programmed into the Xena's registers, to configure
   * the XAUI.
   */
  
  #define	END_SIGN	0x0
  static const u64 herc_act_dtx_cfg[] = {
  	/* Set address */
  	0x8000051536750000ULL, 0x80000515367500E0ULL,
  	/* Write data */
  	0x8000051536750004ULL, 0x80000515367500E4ULL,
  	/* Set address */
  	0x80010515003F0000ULL, 0x80010515003F00E0ULL,
  	/* Write data */
  	0x80010515003F0004ULL, 0x80010515003F00E4ULL,
  	/* Set address */
  	0x801205150D440000ULL, 0x801205150D4400E0ULL,
  	/* Write data */
  	0x801205150D440004ULL, 0x801205150D4400E4ULL,
  	/* Set address */
  	0x80020515F2100000ULL, 0x80020515F21000E0ULL,
  	/* Write data */
  	0x80020515F2100004ULL, 0x80020515F21000E4ULL,
  	/* Done */
  	END_SIGN
  };
  
  static const u64 xena_dtx_cfg[] = {
  	/* Set address */
  	0x8000051500000000ULL, 0x80000515000000E0ULL,
  	/* Write data */
  	0x80000515D9350004ULL, 0x80000515D93500E4ULL,
  	/* Set address */
  	0x8001051500000000ULL, 0x80010515000000E0ULL,
  	/* Write data */
  	0x80010515001E0004ULL, 0x80010515001E00E4ULL,
  	/* Set address */
  	0x8002051500000000ULL, 0x80020515000000E0ULL,
  	/* Write data */
  	0x80020515F2100004ULL, 0x80020515F21000E4ULL,
  	END_SIGN
  };
  
  /*
   * Constants for Fixing the MacAddress problem seen mostly on
   * Alpha machines.
   */
  static const u64 fix_mac[] = {
  	0x0060000000000000ULL, 0x0060600000000000ULL,
  	0x0040600000000000ULL, 0x0000600000000000ULL,
  	0x0020600000000000ULL, 0x0060600000000000ULL,
  	0x0020600000000000ULL, 0x0060600000000000ULL,
  	0x0020600000000000ULL, 0x0060600000000000ULL,
  	0x0020600000000000ULL, 0x0060600000000000ULL,
  	0x0020600000000000ULL, 0x0060600000000000ULL,
  	0x0020600000000000ULL, 0x0060600000000000ULL,
  	0x0020600000000000ULL, 0x0060600000000000ULL,
  	0x0020600000000000ULL, 0x0060600000000000ULL,
  	0x0020600000000000ULL, 0x0060600000000000ULL,
  	0x0020600000000000ULL, 0x0060600000000000ULL,
  	0x0020600000000000ULL, 0x0000600000000000ULL,
  	0x0040600000000000ULL, 0x0060600000000000ULL,
  	END_SIGN
  };
  
  MODULE_LICENSE("GPL");
  MODULE_VERSION(DRV_VERSION);
  
  
  /* Module Loadable parameters. */
  S2IO_PARM_INT(tx_fifo_num, FIFO_DEFAULT_NUM);
  S2IO_PARM_INT(rx_ring_num, 1);
  S2IO_PARM_INT(multiq, 0);
  S2IO_PARM_INT(rx_ring_mode, 1);
  S2IO_PARM_INT(use_continuous_tx_intrs, 1);
  S2IO_PARM_INT(rmac_pause_time, 0x100);
  S2IO_PARM_INT(mc_pause_threshold_q0q3, 187);
  S2IO_PARM_INT(mc_pause_threshold_q4q7, 187);
  S2IO_PARM_INT(shared_splits, 0);
  S2IO_PARM_INT(tmac_util_period, 5);
  S2IO_PARM_INT(rmac_util_period, 5);
  S2IO_PARM_INT(l3l4hdr_size, 128);
  /* 0 is no steering, 1 is Priority steering, 2 is Default steering */
  S2IO_PARM_INT(tx_steering_type, TX_DEFAULT_STEERING);
  /* Frequency of Rx desc syncs expressed as power of 2 */
  S2IO_PARM_INT(rxsync_frequency, 3);
  /* Interrupt type. Values can be 0(INTA), 2(MSI_X) */
  S2IO_PARM_INT(intr_type, 2);
  /* Large receive offload feature */
  
  /* Max pkts to be aggregated by LRO at one time. If not specified,
   * aggregation happens until we hit max IP pkt size(64K)
   */
  S2IO_PARM_INT(lro_max_pkts, 0xFFFF);
  S2IO_PARM_INT(indicate_max_pkts, 0);
  
  S2IO_PARM_INT(napi, 1);
  S2IO_PARM_INT(vlan_tag_strip, NO_STRIP_IN_PROMISC);
  
  static unsigned int tx_fifo_len[MAX_TX_FIFOS] =
  {DEFAULT_FIFO_0_LEN, [1 ...(MAX_TX_FIFOS - 1)] = DEFAULT_FIFO_1_7_LEN};
  static unsigned int rx_ring_sz[MAX_RX_RINGS] =
  {[0 ...(MAX_RX_RINGS - 1)] = SMALL_BLK_CNT};
  static unsigned int rts_frm_len[MAX_RX_RINGS] =
  {[0 ...(MAX_RX_RINGS - 1)] = 0 };
  
  module_param_array(tx_fifo_len, uint, NULL, 0);
  module_param_array(rx_ring_sz, uint, NULL, 0);
  module_param_array(rts_frm_len, uint, NULL, 0);
  
  /*
   * S2IO device table.
   * This table lists all the devices that this driver supports.
   */
  static const struct pci_device_id s2io_tbl[] = {
  	{PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_S2IO_WIN,
  	 PCI_ANY_ID, PCI_ANY_ID},
  	{PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_S2IO_UNI,
  	 PCI_ANY_ID, PCI_ANY_ID},
  	{PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_HERC_WIN,
  	 PCI_ANY_ID, PCI_ANY_ID},
  	{PCI_VENDOR_ID_S2IO, PCI_DEVICE_ID_HERC_UNI,
  	 PCI_ANY_ID, PCI_ANY_ID},
  	{0,}
  };
  
  MODULE_DEVICE_TABLE(pci, s2io_tbl);
  
  static const struct pci_error_handlers s2io_err_handler = {
  	.error_detected = s2io_io_error_detected,
  	.slot_reset = s2io_io_slot_reset,
  	.resume = s2io_io_resume,
  };
  
  static struct pci_driver s2io_driver = {
  	.name = "S2IO",
  	.id_table = s2io_tbl,
  	.probe = s2io_init_nic,
  	.remove = s2io_rem_nic,
  	.err_handler = &s2io_err_handler,
  };
  
  /* A simplifier macro used both by init and free shared_mem Fns(). */
  #define TXD_MEM_PAGE_CNT(len, per_each) DIV_ROUND_UP(len, per_each)
  
  /* netqueue manipulation helper functions */
  static inline void s2io_stop_all_tx_queue(struct s2io_nic *sp)
  {
  	if (!sp->config.multiq) {
  		int i;
  
  		for (i = 0; i < sp->config.tx_fifo_num; i++)
  			sp->mac_control.fifos[i].queue_state = FIFO_QUEUE_STOP;
  	}
  	netif_tx_stop_all_queues(sp->dev);
  }
  
  static inline void s2io_stop_tx_queue(struct s2io_nic *sp, int fifo_no)
  {
  	if (!sp->config.multiq)
  		sp->mac_control.fifos[fifo_no].queue_state =
  			FIFO_QUEUE_STOP;
  
  	netif_tx_stop_all_queues(sp->dev);
  }
  
  static inline void s2io_start_all_tx_queue(struct s2io_nic *sp)
  {
  	if (!sp->config.multiq) {
  		int i;
  
  		for (i = 0; i < sp->config.tx_fifo_num; i++)
  			sp->mac_control.fifos[i].queue_state = FIFO_QUEUE_START;
  	}
  	netif_tx_start_all_queues(sp->dev);
  }
  
  static inline void s2io_wake_all_tx_queue(struct s2io_nic *sp)
  {
  	if (!sp->config.multiq) {
  		int i;
  
  		for (i = 0; i < sp->config.tx_fifo_num; i++)
  			sp->mac_control.fifos[i].queue_state = FIFO_QUEUE_START;
  	}
  	netif_tx_wake_all_queues(sp->dev);
  }
  
  static inline void s2io_wake_tx_queue(
  	struct fifo_info *fifo, int cnt, u8 multiq)
  {
  
  	if (multiq) {
  		if (cnt && __netif_subqueue_stopped(fifo->dev, fifo->fifo_no))
  			netif_wake_subqueue(fifo->dev, fifo->fifo_no);
  	} else if (cnt && (fifo->queue_state == FIFO_QUEUE_STOP)) {
  		if (netif_queue_stopped(fifo->dev)) {
  			fifo->queue_state = FIFO_QUEUE_START;
  			netif_wake_queue(fifo->dev);
  		}
  	}
  }
  
  /**
   * init_shared_mem - Allocation and Initialization of Memory
   * @nic: Device private variable.
   * Description: The function allocates all the memory areas shared
   * between the NIC and the driver. This includes Tx descriptors,
   * Rx descriptors and the statistics block.
   */
  
  static int init_shared_mem(struct s2io_nic *nic)
  {
  	u32 size;
  	void *tmp_v_addr, *tmp_v_addr_next;
  	dma_addr_t tmp_p_addr, tmp_p_addr_next;
  	struct RxD_block *pre_rxd_blk = NULL;
  	int i, j, blk_cnt;
  	int lst_size, lst_per_page;
  	struct net_device *dev = nic->dev;
  	unsigned long tmp;
  	struct buffAdd *ba;
  	struct config_param *config = &nic->config;
  	struct mac_info *mac_control = &nic->mac_control;
  	unsigned long long mem_allocated = 0;
  
  	/* Allocation and initialization of TXDLs in FIFOs */
  	size = 0;
  	for (i = 0; i < config->tx_fifo_num; i++) {
  		struct tx_fifo_config *tx_cfg = &config->tx_cfg[i];
  
  		size += tx_cfg->fifo_len;
  	}
  	if (size > MAX_AVAILABLE_TXDS) {
  		DBG_PRINT(ERR_DBG,
  			  "Too many TxDs requested: %d, max supported: %d\n",
  			  size, MAX_AVAILABLE_TXDS);
  		return -EINVAL;
  	}
  
  	size = 0;
  	for (i = 0; i < config->tx_fifo_num; i++) {
  		struct tx_fifo_config *tx_cfg = &config->tx_cfg[i];
  
  		size = tx_cfg->fifo_len;
  		/*
  		 * Legal values are from 2 to 8192
  		 */
  		if (size < 2) {
  			DBG_PRINT(ERR_DBG, "Fifo %d: Invalid length (%d) - "
  				  "Valid lengths are 2 through 8192\n",
  				  i, size);
  			return -EINVAL;
  		}
  	}
  
  	lst_size = (sizeof(struct TxD) * config->max_txds);
  	lst_per_page = PAGE_SIZE / lst_size;
  
  	for (i = 0; i < config->tx_fifo_num; i++) {
  		struct fifo_info *fifo = &mac_control->fifos[i];
  		struct tx_fifo_config *tx_cfg = &config->tx_cfg[i];
  		int fifo_len = tx_cfg->fifo_len;
  		int list_holder_size = fifo_len * sizeof(struct list_info_hold);
  
  		fifo->list_info = kzalloc(list_holder_size, GFP_KERNEL);
  		if (!fifo->list_info) {
  			DBG_PRINT(INFO_DBG, "Malloc failed for list_info\n");
  			return -ENOMEM;
  		}
  		mem_allocated += list_holder_size;
  	}
  	for (i = 0; i < config->tx_fifo_num; i++) {
  		int page_num = TXD_MEM_PAGE_CNT(config->tx_cfg[i].fifo_len,
  						lst_per_page);
  		struct fifo_info *fifo = &mac_control->fifos[i];
  		struct tx_fifo_config *tx_cfg = &config->tx_cfg[i];
  
  		fifo->tx_curr_put_info.offset = 0;
  		fifo->tx_curr_put_info.fifo_len = tx_cfg->fifo_len - 1;
  		fifo->tx_curr_get_info.offset = 0;
  		fifo->tx_curr_get_info.fifo_len = tx_cfg->fifo_len - 1;
  		fifo->fifo_no = i;
  		fifo->nic = nic;
  		fifo->max_txds = MAX_SKB_FRAGS + 2;
  		fifo->dev = dev;
  
  		for (j = 0; j < page_num; j++) {
  			int k = 0;
  			dma_addr_t tmp_p;
  			void *tmp_v;
  			tmp_v = dma_alloc_coherent(&nic->pdev->dev, PAGE_SIZE,
  						   &tmp_p, GFP_KERNEL);
  			if (!tmp_v) {
  				DBG_PRINT(INFO_DBG,
  					  "dma_alloc_coherent failed for TxDL\n");
  				return -ENOMEM;
  			}
  			/* If we got a zero DMA address(can happen on
  			 * certain platforms like PPC), reallocate.
  			 * Store virtual address of page we don't want,
  			 * to be freed later.
  			 */
  			if (!tmp_p) {
  				mac_control->zerodma_virt_addr = tmp_v;
  				DBG_PRINT(INIT_DBG,
  					  "%s: Zero DMA address for TxDL. "
  					  "Virtual address %p\n",
  					  dev->name, tmp_v);
  				tmp_v = dma_alloc_coherent(&nic->pdev->dev,
  							   PAGE_SIZE, &tmp_p,
  							   GFP_KERNEL);
  				if (!tmp_v) {
  					DBG_PRINT(INFO_DBG,
  						  "dma_alloc_coherent failed for TxDL\n");
  					return -ENOMEM;
  				}
  				mem_allocated += PAGE_SIZE;
  			}
  			while (k < lst_per_page) {
  				int l = (j * lst_per_page) + k;
  				if (l == tx_cfg->fifo_len)
  					break;
  				fifo->list_info[l].list_virt_addr =
  					tmp_v + (k * lst_size);
  				fifo->list_info[l].list_phy_addr =
  					tmp_p + (k * lst_size);
  				k++;
  			}
  		}
  	}
  
  	for (i = 0; i < config->tx_fifo_num; i++) {
  		struct fifo_info *fifo = &mac_control->fifos[i];
  		struct tx_fifo_config *tx_cfg = &config->tx_cfg[i];
  
  		size = tx_cfg->fifo_len;
  		fifo->ufo_in_band_v = kcalloc(size, sizeof(u64), GFP_KERNEL);
  		if (!fifo->ufo_in_band_v)
  			return -ENOMEM;
  		mem_allocated += (size * sizeof(u64));
  	}
  
  	/* Allocation and initialization of RXDs in Rings */
  	size = 0;
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct rx_ring_config *rx_cfg = &config->rx_cfg[i];
  		struct ring_info *ring = &mac_control->rings[i];
  
  		if (rx_cfg->num_rxd % (rxd_count[nic->rxd_mode] + 1)) {
  			DBG_PRINT(ERR_DBG, "%s: Ring%d RxD count is not a "
  				  "multiple of RxDs per Block\n",
  				  dev->name, i);
  			return FAILURE;
  		}
  		size += rx_cfg->num_rxd;
  		ring->block_count = rx_cfg->num_rxd /
  			(rxd_count[nic->rxd_mode] + 1);
  		ring->pkt_cnt = rx_cfg->num_rxd - ring->block_count;
  	}
  	if (nic->rxd_mode == RXD_MODE_1)
  		size = (size * (sizeof(struct RxD1)));
  	else
  		size = (size * (sizeof(struct RxD3)));
  
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct rx_ring_config *rx_cfg = &config->rx_cfg[i];
  		struct ring_info *ring = &mac_control->rings[i];
  
  		ring->rx_curr_get_info.block_index = 0;
  		ring->rx_curr_get_info.offset = 0;
  		ring->rx_curr_get_info.ring_len = rx_cfg->num_rxd - 1;
  		ring->rx_curr_put_info.block_index = 0;
  		ring->rx_curr_put_info.offset = 0;
  		ring->rx_curr_put_info.ring_len = rx_cfg->num_rxd - 1;
  		ring->nic = nic;
  		ring->ring_no = i;
  
  		blk_cnt = rx_cfg->num_rxd / (rxd_count[nic->rxd_mode] + 1);
  		/*  Allocating all the Rx blocks */
  		for (j = 0; j < blk_cnt; j++) {
  			struct rx_block_info *rx_blocks;
  			int l;
  
  			rx_blocks = &ring->rx_blocks[j];
  			size = SIZE_OF_BLOCK;	/* size is always page size */
  			tmp_v_addr = dma_alloc_coherent(&nic->pdev->dev, size,
  							&tmp_p_addr, GFP_KERNEL);
  			if (tmp_v_addr == NULL) {
  				/*
  				 * In case of failure, free_shared_mem()
  				 * is called, which should free any
  				 * memory that was alloced till the
  				 * failure happened.
  				 */
  				rx_blocks->block_virt_addr = tmp_v_addr;
  				return -ENOMEM;
  			}
  			mem_allocated += size;
  
  			size = sizeof(struct rxd_info) *
  				rxd_count[nic->rxd_mode];
  			rx_blocks->block_virt_addr = tmp_v_addr;
  			rx_blocks->block_dma_addr = tmp_p_addr;
  			rx_blocks->rxds = kmalloc(size,  GFP_KERNEL);
  			if (!rx_blocks->rxds)
  				return -ENOMEM;
  			mem_allocated += size;
  			for (l = 0; l < rxd_count[nic->rxd_mode]; l++) {
  				rx_blocks->rxds[l].virt_addr =
  					rx_blocks->block_virt_addr +
  					(rxd_size[nic->rxd_mode] * l);
  				rx_blocks->rxds[l].dma_addr =
  					rx_blocks->block_dma_addr +
  					(rxd_size[nic->rxd_mode] * l);
  			}
  		}
  		/* Interlinking all Rx Blocks */
  		for (j = 0; j < blk_cnt; j++) {
  			int next = (j + 1) % blk_cnt;
  			tmp_v_addr = ring->rx_blocks[j].block_virt_addr;
  			tmp_v_addr_next = ring->rx_blocks[next].block_virt_addr;
  			tmp_p_addr = ring->rx_blocks[j].block_dma_addr;
  			tmp_p_addr_next = ring->rx_blocks[next].block_dma_addr;
  
  			pre_rxd_blk = tmp_v_addr;
  			pre_rxd_blk->reserved_2_pNext_RxD_block =
  				(unsigned long)tmp_v_addr_next;
  			pre_rxd_blk->pNext_RxD_Blk_physical =
  				(u64)tmp_p_addr_next;
  		}
  	}
  	if (nic->rxd_mode == RXD_MODE_3B) {
  		/*
  		 * Allocation of Storages for buffer addresses in 2BUFF mode
  		 * and the buffers as well.
  		 */
  		for (i = 0; i < config->rx_ring_num; i++) {
  			struct rx_ring_config *rx_cfg = &config->rx_cfg[i];
  			struct ring_info *ring = &mac_control->rings[i];
  
  			blk_cnt = rx_cfg->num_rxd /
  				(rxd_count[nic->rxd_mode] + 1);
  			size = sizeof(struct buffAdd *) * blk_cnt;
  			ring->ba = kmalloc(size, GFP_KERNEL);
  			if (!ring->ba)
  				return -ENOMEM;
  			mem_allocated += size;
  			for (j = 0; j < blk_cnt; j++) {
  				int k = 0;
  
  				size = sizeof(struct buffAdd) *
  					(rxd_count[nic->rxd_mode] + 1);
  				ring->ba[j] = kmalloc(size, GFP_KERNEL);
  				if (!ring->ba[j])
  					return -ENOMEM;
  				mem_allocated += size;
  				while (k != rxd_count[nic->rxd_mode]) {
  					ba = &ring->ba[j][k];
  					size = BUF0_LEN + ALIGN_SIZE;
  					ba->ba_0_org = kmalloc(size, GFP_KERNEL);
  					if (!ba->ba_0_org)
  						return -ENOMEM;
  					mem_allocated += size;
  					tmp = (unsigned long)ba->ba_0_org;
  					tmp += ALIGN_SIZE;
  					tmp &= ~((unsigned long)ALIGN_SIZE);
  					ba->ba_0 = (void *)tmp;
  
  					size = BUF1_LEN + ALIGN_SIZE;
  					ba->ba_1_org = kmalloc(size, GFP_KERNEL);
  					if (!ba->ba_1_org)
  						return -ENOMEM;
  					mem_allocated += size;
  					tmp = (unsigned long)ba->ba_1_org;
  					tmp += ALIGN_SIZE;
  					tmp &= ~((unsigned long)ALIGN_SIZE);
  					ba->ba_1 = (void *)tmp;
  					k++;
  				}
  			}
  		}
  	}
  
  	/* Allocation and initialization of Statistics block */
  	size = sizeof(struct stat_block);
  	mac_control->stats_mem =
  		dma_alloc_coherent(&nic->pdev->dev, size,
  				   &mac_control->stats_mem_phy, GFP_KERNEL);
  
  	if (!mac_control->stats_mem) {
  		/*
  		 * In case of failure, free_shared_mem() is called, which
  		 * should free any memory that was alloced till the
  		 * failure happened.
  		 */
  		return -ENOMEM;
  	}
  	mem_allocated += size;
  	mac_control->stats_mem_sz = size;
  
  	tmp_v_addr = mac_control->stats_mem;
  	mac_control->stats_info = tmp_v_addr;
  	memset(tmp_v_addr, 0, size);
  	DBG_PRINT(INIT_DBG, "%s: Ring Mem PHY: 0x%llx\n",
  		dev_name(&nic->pdev->dev), (unsigned long long)tmp_p_addr);
  	mac_control->stats_info->sw_stat.mem_allocated += mem_allocated;
  	return SUCCESS;
  }
  
  /**
   * free_shared_mem - Free the allocated Memory
   * @nic:  Device private variable.
   * Description: This function is to free all memory locations allocated by
   * the init_shared_mem() function and return it to the kernel.
   */
  
  static void free_shared_mem(struct s2io_nic *nic)
  {
  	int i, j, blk_cnt, size;
  	void *tmp_v_addr;
  	dma_addr_t tmp_p_addr;
  	int lst_size, lst_per_page;
  	struct net_device *dev;
  	int page_num = 0;
  	struct config_param *config;
  	struct mac_info *mac_control;
  	struct stat_block *stats;
  	struct swStat *swstats;
  
  	if (!nic)
  		return;
  
  	dev = nic->dev;
  
  	config = &nic->config;
  	mac_control = &nic->mac_control;
  	stats = mac_control->stats_info;
  	swstats = &stats->sw_stat;
  
  	lst_size = sizeof(struct TxD) * config->max_txds;
  	lst_per_page = PAGE_SIZE / lst_size;
  
  	for (i = 0; i < config->tx_fifo_num; i++) {
  		struct fifo_info *fifo = &mac_control->fifos[i];
  		struct tx_fifo_config *tx_cfg = &config->tx_cfg[i];
  
  		page_num = TXD_MEM_PAGE_CNT(tx_cfg->fifo_len, lst_per_page);
  		for (j = 0; j < page_num; j++) {
  			int mem_blks = (j * lst_per_page);
  			struct list_info_hold *fli;
  
  			if (!fifo->list_info)
  				return;
  
  			fli = &fifo->list_info[mem_blks];
  			if (!fli->list_virt_addr)
  				break;
  			dma_free_coherent(&nic->pdev->dev, PAGE_SIZE,
  					  fli->list_virt_addr,
  					  fli->list_phy_addr);
  			swstats->mem_freed += PAGE_SIZE;
  		}
  		/* If we got a zero DMA address during allocation,
  		 * free the page now
  		 */
  		if (mac_control->zerodma_virt_addr) {
  			dma_free_coherent(&nic->pdev->dev, PAGE_SIZE,
  					  mac_control->zerodma_virt_addr,
  					  (dma_addr_t)0);
  			DBG_PRINT(INIT_DBG,
  				  "%s: Freeing TxDL with zero DMA address. "
  				  "Virtual address %p\n",
  				  dev->name, mac_control->zerodma_virt_addr);
  			swstats->mem_freed += PAGE_SIZE;
  		}
  		kfree(fifo->list_info);
  		swstats->mem_freed += tx_cfg->fifo_len *
  			sizeof(struct list_info_hold);
  	}
  
  	size = SIZE_OF_BLOCK;
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct ring_info *ring = &mac_control->rings[i];
  
  		blk_cnt = ring->block_count;
  		for (j = 0; j < blk_cnt; j++) {
  			tmp_v_addr = ring->rx_blocks[j].block_virt_addr;
  			tmp_p_addr = ring->rx_blocks[j].block_dma_addr;
  			if (tmp_v_addr == NULL)
  				break;
  			dma_free_coherent(&nic->pdev->dev, size, tmp_v_addr,
  					  tmp_p_addr);
  			swstats->mem_freed += size;
  			kfree(ring->rx_blocks[j].rxds);
  			swstats->mem_freed += sizeof(struct rxd_info) *
  				rxd_count[nic->rxd_mode];
  		}
  	}
  
  	if (nic->rxd_mode == RXD_MODE_3B) {
  		/* Freeing buffer storage addresses in 2BUFF mode. */
  		for (i = 0; i < config->rx_ring_num; i++) {
  			struct rx_ring_config *rx_cfg = &config->rx_cfg[i];
  			struct ring_info *ring = &mac_control->rings[i];
  
  			blk_cnt = rx_cfg->num_rxd /
  				(rxd_count[nic->rxd_mode] + 1);
  			for (j = 0; j < blk_cnt; j++) {
  				int k = 0;
  				if (!ring->ba[j])
  					continue;
  				while (k != rxd_count[nic->rxd_mode]) {
  					struct buffAdd *ba = &ring->ba[j][k];
  					kfree(ba->ba_0_org);
  					swstats->mem_freed +=
  						BUF0_LEN + ALIGN_SIZE;
  					kfree(ba->ba_1_org);
  					swstats->mem_freed +=
  						BUF1_LEN + ALIGN_SIZE;
  					k++;
  				}
  				kfree(ring->ba[j]);
  				swstats->mem_freed += sizeof(struct buffAdd) *
  					(rxd_count[nic->rxd_mode] + 1);
  			}
  			kfree(ring->ba);
  			swstats->mem_freed += sizeof(struct buffAdd *) *
  				blk_cnt;
  		}
  	}
  
  	for (i = 0; i < nic->config.tx_fifo_num; i++) {
  		struct fifo_info *fifo = &mac_control->fifos[i];
  		struct tx_fifo_config *tx_cfg = &config->tx_cfg[i];
  
  		if (fifo->ufo_in_band_v) {
  			swstats->mem_freed += tx_cfg->fifo_len *
  				sizeof(u64);
  			kfree(fifo->ufo_in_band_v);
  		}
  	}
  
  	if (mac_control->stats_mem) {
  		swstats->mem_freed += mac_control->stats_mem_sz;
  		dma_free_coherent(&nic->pdev->dev, mac_control->stats_mem_sz,
  				  mac_control->stats_mem,
  				  mac_control->stats_mem_phy);
  	}
  }
  
  /*
   * s2io_verify_pci_mode -
   */
  
  static int s2io_verify_pci_mode(struct s2io_nic *nic)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	register u64 val64 = 0;
  	int     mode;
  
  	val64 = readq(&bar0->pci_mode);
  	mode = (u8)GET_PCI_MODE(val64);
  
  	if (val64 & PCI_MODE_UNKNOWN_MODE)
  		return -1;      /* Unknown PCI mode */
  	return mode;
  }
  
  #define NEC_VENID   0x1033
  #define NEC_DEVID   0x0125
  static int s2io_on_nec_bridge(struct pci_dev *s2io_pdev)
  {
  	struct pci_dev *tdev = NULL;
  	for_each_pci_dev(tdev) {
  		if (tdev->vendor == NEC_VENID && tdev->device == NEC_DEVID) {
  			if (tdev->bus == s2io_pdev->bus->parent) {
  				pci_dev_put(tdev);
  				return 1;
  			}
  		}
  	}
  	return 0;
  }
  
  static int bus_speed[8] = {33, 133, 133, 200, 266, 133, 200, 266};
  /*
   * s2io_print_pci_mode -
   */
  static int s2io_print_pci_mode(struct s2io_nic *nic)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	register u64 val64 = 0;
  	int	mode;
  	struct config_param *config = &nic->config;
  	const char *pcimode;
  
  	val64 = readq(&bar0->pci_mode);
  	mode = (u8)GET_PCI_MODE(val64);
  
  	if (val64 & PCI_MODE_UNKNOWN_MODE)
  		return -1;	/* Unknown PCI mode */
  
  	config->bus_speed = bus_speed[mode];
  
  	if (s2io_on_nec_bridge(nic->pdev)) {
  		DBG_PRINT(ERR_DBG, "%s: Device is on PCI-E bus\n",
  			  nic->dev->name);
  		return mode;
  	}
  
  	switch (mode) {
  	case PCI_MODE_PCI_33:
  		pcimode = "33MHz PCI bus";
  		break;
  	case PCI_MODE_PCI_66:
  		pcimode = "66MHz PCI bus";
  		break;
  	case PCI_MODE_PCIX_M1_66:
  		pcimode = "66MHz PCIX(M1) bus";
  		break;
  	case PCI_MODE_PCIX_M1_100:
  		pcimode = "100MHz PCIX(M1) bus";
  		break;
  	case PCI_MODE_PCIX_M1_133:
  		pcimode = "133MHz PCIX(M1) bus";
  		break;
  	case PCI_MODE_PCIX_M2_66:
  		pcimode = "133MHz PCIX(M2) bus";
  		break;
  	case PCI_MODE_PCIX_M2_100:
  		pcimode = "200MHz PCIX(M2) bus";
  		break;
  	case PCI_MODE_PCIX_M2_133:
  		pcimode = "266MHz PCIX(M2) bus";
  		break;
  	default:
  		pcimode = "unsupported bus!";
  		mode = -1;
  	}
  
  	DBG_PRINT(ERR_DBG, "%s: Device is on %d bit %s\n",
  		  nic->dev->name, val64 & PCI_MODE_32_BITS ? 32 : 64, pcimode);
  
  	return mode;
  }
  
  /**
   *  init_tti - Initialization transmit traffic interrupt scheme
   *  @nic: device private variable
   *  @link: link status (UP/DOWN) used to enable/disable continuous
   *  transmit interrupts
   *  @may_sleep: parameter indicates if sleeping when waiting for
   *  command complete
   *  Description: The function configures transmit traffic interrupts
   *  Return Value:  SUCCESS on success and
   *  '-1' on failure
   */
  
  static int init_tti(struct s2io_nic *nic, int link, bool may_sleep)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	register u64 val64 = 0;
  	int i;
  	struct config_param *config = &nic->config;
  
  	for (i = 0; i < config->tx_fifo_num; i++) {
  		/*
  		 * TTI Initialization. Default Tx timer gets us about
  		 * 250 interrupts per sec. Continuous interrupts are enabled
  		 * by default.
  		 */
  		if (nic->device_type == XFRAME_II_DEVICE) {
  			int count = (nic->config.bus_speed * 125)/2;
  			val64 = TTI_DATA1_MEM_TX_TIMER_VAL(count);
  		} else
  			val64 = TTI_DATA1_MEM_TX_TIMER_VAL(0x2078);
  
  		val64 |= TTI_DATA1_MEM_TX_URNG_A(0xA) |
  			TTI_DATA1_MEM_TX_URNG_B(0x10) |
  			TTI_DATA1_MEM_TX_URNG_C(0x30) |
  			TTI_DATA1_MEM_TX_TIMER_AC_EN;
  		if (i == 0)
  			if (use_continuous_tx_intrs && (link == LINK_UP))
  				val64 |= TTI_DATA1_MEM_TX_TIMER_CI_EN;
  		writeq(val64, &bar0->tti_data1_mem);
  
  		if (nic->config.intr_type == MSI_X) {
  			val64 = TTI_DATA2_MEM_TX_UFC_A(0x10) |
  				TTI_DATA2_MEM_TX_UFC_B(0x100) |
  				TTI_DATA2_MEM_TX_UFC_C(0x200) |
  				TTI_DATA2_MEM_TX_UFC_D(0x300);
  		} else {
  			if ((nic->config.tx_steering_type ==
  			     TX_DEFAULT_STEERING) &&
  			    (config->tx_fifo_num > 1) &&
  			    (i >= nic->udp_fifo_idx) &&
  			    (i < (nic->udp_fifo_idx +
  				  nic->total_udp_fifos)))
  				val64 = TTI_DATA2_MEM_TX_UFC_A(0x50) |
  					TTI_DATA2_MEM_TX_UFC_B(0x80) |
  					TTI_DATA2_MEM_TX_UFC_C(0x100) |
  					TTI_DATA2_MEM_TX_UFC_D(0x120);
  			else
  				val64 = TTI_DATA2_MEM_TX_UFC_A(0x10) |
  					TTI_DATA2_MEM_TX_UFC_B(0x20) |
  					TTI_DATA2_MEM_TX_UFC_C(0x40) |
  					TTI_DATA2_MEM_TX_UFC_D(0x80);
  		}
  
  		writeq(val64, &bar0->tti_data2_mem);
  
  		val64 = TTI_CMD_MEM_WE |
  			TTI_CMD_MEM_STROBE_NEW_CMD |
  			TTI_CMD_MEM_OFFSET(i);
  		writeq(val64, &bar0->tti_command_mem);
  
  		if (wait_for_cmd_complete(&bar0->tti_command_mem,
  					  TTI_CMD_MEM_STROBE_NEW_CMD,
  					  S2IO_BIT_RESET, may_sleep) != SUCCESS)
  			return FAILURE;
  	}
  
  	return SUCCESS;
  }
  
  /**
   *  init_nic - Initialization of hardware
   *  @nic: device private variable
   *  Description: The function sequentially configures every block
   *  of the H/W from their reset values.
   *  Return Value:  SUCCESS on success and
   *  '-1' on failure (endian settings incorrect).
   */
  
  static int init_nic(struct s2io_nic *nic)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	struct net_device *dev = nic->dev;
  	register u64 val64 = 0;
  	void __iomem *add;
  	u32 time;
  	int i, j;
  	int dtx_cnt = 0;
  	unsigned long long mem_share;
  	int mem_size;
  	struct config_param *config = &nic->config;
  	struct mac_info *mac_control = &nic->mac_control;
  
  	/* to set the swapper controle on the card */
  	if (s2io_set_swapper(nic)) {
  		DBG_PRINT(ERR_DBG, "ERROR: Setting Swapper failed\n");
  		return -EIO;
  	}
  
  	/*
  	 * Herc requires EOI to be removed from reset before XGXS, so..
  	 */
  	if (nic->device_type & XFRAME_II_DEVICE) {
  		val64 = 0xA500000000ULL;
  		writeq(val64, &bar0->sw_reset);
  		msleep(500);
  		val64 = readq(&bar0->sw_reset);
  	}
  
  	/* Remove XGXS from reset state */
  	val64 = 0;
  	writeq(val64, &bar0->sw_reset);
  	msleep(500);
  	val64 = readq(&bar0->sw_reset);
  
  	/* Ensure that it's safe to access registers by checking
  	 * RIC_RUNNING bit is reset. Check is valid only for XframeII.
  	 */
  	if (nic->device_type == XFRAME_II_DEVICE) {
  		for (i = 0; i < 50; i++) {
  			val64 = readq(&bar0->adapter_status);
  			if (!(val64 & ADAPTER_STATUS_RIC_RUNNING))
  				break;
  			msleep(10);
  		}
  		if (i == 50)
  			return -ENODEV;
  	}
  
  	/*  Enable Receiving broadcasts */
  	add = &bar0->mac_cfg;
  	val64 = readq(&bar0->mac_cfg);
  	val64 |= MAC_RMAC_BCAST_ENABLE;
  	writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
  	writel((u32)val64, add);
  	writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
  	writel((u32) (val64 >> 32), (add + 4));
  
  	/* Read registers in all blocks */
  	val64 = readq(&bar0->mac_int_mask);
  	val64 = readq(&bar0->mc_int_mask);
  	val64 = readq(&bar0->xgxs_int_mask);
  
  	/*  Set MTU */
  	val64 = dev->mtu;
  	writeq(vBIT(val64, 2, 14), &bar0->rmac_max_pyld_len);
  
  	if (nic->device_type & XFRAME_II_DEVICE) {
  		while (herc_act_dtx_cfg[dtx_cnt] != END_SIGN) {
  			SPECIAL_REG_WRITE(herc_act_dtx_cfg[dtx_cnt],
  					  &bar0->dtx_control, UF);
  			if (dtx_cnt & 0x1)
  				msleep(1); /* Necessary!! */
  			dtx_cnt++;
  		}
  	} else {
  		while (xena_dtx_cfg[dtx_cnt] != END_SIGN) {
  			SPECIAL_REG_WRITE(xena_dtx_cfg[dtx_cnt],
  					  &bar0->dtx_control, UF);
  			val64 = readq(&bar0->dtx_control);
  			dtx_cnt++;
  		}
  	}
  
  	/*  Tx DMA Initialization */
  	val64 = 0;
  	writeq(val64, &bar0->tx_fifo_partition_0);
  	writeq(val64, &bar0->tx_fifo_partition_1);
  	writeq(val64, &bar0->tx_fifo_partition_2);
  	writeq(val64, &bar0->tx_fifo_partition_3);
  
  	for (i = 0, j = 0; i < config->tx_fifo_num; i++) {
  		struct tx_fifo_config *tx_cfg = &config->tx_cfg[i];
  
  		val64 |= vBIT(tx_cfg->fifo_len - 1, ((j * 32) + 19), 13) |
  			vBIT(tx_cfg->fifo_priority, ((j * 32) + 5), 3);
  
  		if (i == (config->tx_fifo_num - 1)) {
  			if (i % 2 == 0)
  				i++;
  		}
  
  		switch (i) {
  		case 1:
  			writeq(val64, &bar0->tx_fifo_partition_0);
  			val64 = 0;
  			j = 0;
  			break;
  		case 3:
  			writeq(val64, &bar0->tx_fifo_partition_1);
  			val64 = 0;
  			j = 0;
  			break;
  		case 5:
  			writeq(val64, &bar0->tx_fifo_partition_2);
  			val64 = 0;
  			j = 0;
  			break;
  		case 7:
  			writeq(val64, &bar0->tx_fifo_partition_3);
  			val64 = 0;
  			j = 0;
  			break;
  		default:
  			j++;
  			break;
  		}
  	}
  
  	/*
  	 * Disable 4 PCCs for Xena1, 2 and 3 as per H/W bug
  	 * SXE-008 TRANSMIT DMA ARBITRATION ISSUE.
  	 */
  	if ((nic->device_type == XFRAME_I_DEVICE) && (nic->pdev->revision < 4))
  		writeq(PCC_ENABLE_FOUR, &bar0->pcc_enable);
  
  	val64 = readq(&bar0->tx_fifo_partition_0);
  	DBG_PRINT(INIT_DBG, "Fifo partition at: 0x%p is: 0x%llx\n",
  		  &bar0->tx_fifo_partition_0, (unsigned long long)val64);
  
  	/*
  	 * Initialization of Tx_PA_CONFIG register to ignore packet
  	 * integrity checking.
  	 */
  	val64 = readq(&bar0->tx_pa_cfg);
  	val64 |= TX_PA_CFG_IGNORE_FRM_ERR |
  		TX_PA_CFG_IGNORE_SNAP_OUI |
  		TX_PA_CFG_IGNORE_LLC_CTRL |
  		TX_PA_CFG_IGNORE_L2_ERR;
  	writeq(val64, &bar0->tx_pa_cfg);
  
  	/* Rx DMA initialization. */
  	val64 = 0;
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct rx_ring_config *rx_cfg = &config->rx_cfg[i];
  
  		val64 |= vBIT(rx_cfg->ring_priority, (5 + (i * 8)), 3);
  	}
  	writeq(val64, &bar0->rx_queue_priority);
  
  	/*
  	 * Allocating equal share of memory to all the
  	 * configured Rings.
  	 */
  	val64 = 0;
  	if (nic->device_type & XFRAME_II_DEVICE)
  		mem_size = 32;
  	else
  		mem_size = 64;
  
  	for (i = 0; i < config->rx_ring_num; i++) {
  		switch (i) {
  		case 0:
  			mem_share = (mem_size / config->rx_ring_num +
  				     mem_size % config->rx_ring_num);
  			val64 |= RX_QUEUE_CFG_Q0_SZ(mem_share);
  			continue;
  		case 1:
  			mem_share = (mem_size / config->rx_ring_num);
  			val64 |= RX_QUEUE_CFG_Q1_SZ(mem_share);
  			continue;
  		case 2:
  			mem_share = (mem_size / config->rx_ring_num);
  			val64 |= RX_QUEUE_CFG_Q2_SZ(mem_share);
  			continue;
  		case 3:
  			mem_share = (mem_size / config->rx_ring_num);
  			val64 |= RX_QUEUE_CFG_Q3_SZ(mem_share);
  			continue;
  		case 4:
  			mem_share = (mem_size / config->rx_ring_num);
  			val64 |= RX_QUEUE_CFG_Q4_SZ(mem_share);
  			continue;
  		case 5:
  			mem_share = (mem_size / config->rx_ring_num);
  			val64 |= RX_QUEUE_CFG_Q5_SZ(mem_share);
  			continue;
  		case 6:
  			mem_share = (mem_size / config->rx_ring_num);
  			val64 |= RX_QUEUE_CFG_Q6_SZ(mem_share);
  			continue;
  		case 7:
  			mem_share = (mem_size / config->rx_ring_num);
  			val64 |= RX_QUEUE_CFG_Q7_SZ(mem_share);
  			continue;
  		}
  	}
  	writeq(val64, &bar0->rx_queue_cfg);
  
  	/*
  	 * Filling Tx round robin registers
  	 * as per the number of FIFOs for equal scheduling priority
  	 */
  	switch (config->tx_fifo_num) {
  	case 1:
  		val64 = 0x0;
  		writeq(val64, &bar0->tx_w_round_robin_0);
  		writeq(val64, &bar0->tx_w_round_robin_1);
  		writeq(val64, &bar0->tx_w_round_robin_2);
  		writeq(val64, &bar0->tx_w_round_robin_3);
  		writeq(val64, &bar0->tx_w_round_robin_4);
  		break;
  	case 2:
  		val64 = 0x0001000100010001ULL;
  		writeq(val64, &bar0->tx_w_round_robin_0);
  		writeq(val64, &bar0->tx_w_round_robin_1);
  		writeq(val64, &bar0->tx_w_round_robin_2);
  		writeq(val64, &bar0->tx_w_round_robin_3);
  		val64 = 0x0001000100000000ULL;
  		writeq(val64, &bar0->tx_w_round_robin_4);
  		break;
  	case 3:
  		val64 = 0x0001020001020001ULL;
  		writeq(val64, &bar0->tx_w_round_robin_0);
  		val64 = 0x0200010200010200ULL;
  		writeq(val64, &bar0->tx_w_round_robin_1);
  		val64 = 0x0102000102000102ULL;
  		writeq(val64, &bar0->tx_w_round_robin_2);
  		val64 = 0x0001020001020001ULL;
  		writeq(val64, &bar0->tx_w_round_robin_3);
  		val64 = 0x0200010200000000ULL;
  		writeq(val64, &bar0->tx_w_round_robin_4);
  		break;
  	case 4:
  		val64 = 0x0001020300010203ULL;
  		writeq(val64, &bar0->tx_w_round_robin_0);
  		writeq(val64, &bar0->tx_w_round_robin_1);
  		writeq(val64, &bar0->tx_w_round_robin_2);
  		writeq(val64, &bar0->tx_w_round_robin_3);
  		val64 = 0x0001020300000000ULL;
  		writeq(val64, &bar0->tx_w_round_robin_4);
  		break;
  	case 5:
  		val64 = 0x0001020304000102ULL;
  		writeq(val64, &bar0->tx_w_round_robin_0);
  		val64 = 0x0304000102030400ULL;
  		writeq(val64, &bar0->tx_w_round_robin_1);
  		val64 = 0x0102030400010203ULL;
  		writeq(val64, &bar0->tx_w_round_robin_2);
  		val64 = 0x0400010203040001ULL;
  		writeq(val64, &bar0->tx_w_round_robin_3);
  		val64 = 0x0203040000000000ULL;
  		writeq(val64, &bar0->tx_w_round_robin_4);
  		break;
  	case 6:
  		val64 = 0x0001020304050001ULL;
  		writeq(val64, &bar0->tx_w_round_robin_0);
  		val64 = 0x0203040500010203ULL;
  		writeq(val64, &bar0->tx_w_round_robin_1);
  		val64 = 0x0405000102030405ULL;
  		writeq(val64, &bar0->tx_w_round_robin_2);
  		val64 = 0x0001020304050001ULL;
  		writeq(val64, &bar0->tx_w_round_robin_3);
  		val64 = 0x0203040500000000ULL;
  		writeq(val64, &bar0->tx_w_round_robin_4);
  		break;
  	case 7:
  		val64 = 0x0001020304050600ULL;
  		writeq(val64, &bar0->tx_w_round_robin_0);
  		val64 = 0x0102030405060001ULL;
  		writeq(val64, &bar0->tx_w_round_robin_1);
  		val64 = 0x0203040506000102ULL;
  		writeq(val64, &bar0->tx_w_round_robin_2);
  		val64 = 0x0304050600010203ULL;
  		writeq(val64, &bar0->tx_w_round_robin_3);
  		val64 = 0x0405060000000000ULL;
  		writeq(val64, &bar0->tx_w_round_robin_4);
  		break;
  	case 8:
  		val64 = 0x0001020304050607ULL;
  		writeq(val64, &bar0->tx_w_round_robin_0);
  		writeq(val64, &bar0->tx_w_round_robin_1);
  		writeq(val64, &bar0->tx_w_round_robin_2);
  		writeq(val64, &bar0->tx_w_round_robin_3);
  		val64 = 0x0001020300000000ULL;
  		writeq(val64, &bar0->tx_w_round_robin_4);
  		break;
  	}
  
  	/* Enable all configured Tx FIFO partitions */
  	val64 = readq(&bar0->tx_fifo_partition_0);
  	val64 |= (TX_FIFO_PARTITION_EN);
  	writeq(val64, &bar0->tx_fifo_partition_0);
  
  	/* Filling the Rx round robin registers as per the
  	 * number of Rings and steering based on QoS with
  	 * equal priority.
  	 */
  	switch (config->rx_ring_num) {
  	case 1:
  		val64 = 0x0;
  		writeq(val64, &bar0->rx_w_round_robin_0);
  		writeq(val64, &bar0->rx_w_round_robin_1);
  		writeq(val64, &bar0->rx_w_round_robin_2);
  		writeq(val64, &bar0->rx_w_round_robin_3);
  		writeq(val64, &bar0->rx_w_round_robin_4);
  
  		val64 = 0x8080808080808080ULL;
  		writeq(val64, &bar0->rts_qos_steering);
  		break;
  	case 2:
  		val64 = 0x0001000100010001ULL;
  		writeq(val64, &bar0->rx_w_round_robin_0);
  		writeq(val64, &bar0->rx_w_round_robin_1);
  		writeq(val64, &bar0->rx_w_round_robin_2);
  		writeq(val64, &bar0->rx_w_round_robin_3);
  		val64 = 0x0001000100000000ULL;
  		writeq(val64, &bar0->rx_w_round_robin_4);
  
  		val64 = 0x8080808040404040ULL;
  		writeq(val64, &bar0->rts_qos_steering);
  		break;
  	case 3:
  		val64 = 0x0001020001020001ULL;
  		writeq(val64, &bar0->rx_w_round_robin_0);
  		val64 = 0x0200010200010200ULL;
  		writeq(val64, &bar0->rx_w_round_robin_1);
  		val64 = 0x0102000102000102ULL;
  		writeq(val64, &bar0->rx_w_round_robin_2);
  		val64 = 0x0001020001020001ULL;
  		writeq(val64, &bar0->rx_w_round_robin_3);
  		val64 = 0x0200010200000000ULL;
  		writeq(val64, &bar0->rx_w_round_robin_4);
  
  		val64 = 0x8080804040402020ULL;
  		writeq(val64, &bar0->rts_qos_steering);
  		break;
  	case 4:
  		val64 = 0x0001020300010203ULL;
  		writeq(val64, &bar0->rx_w_round_robin_0);
  		writeq(val64, &bar0->rx_w_round_robin_1);
  		writeq(val64, &bar0->rx_w_round_robin_2);
  		writeq(val64, &bar0->rx_w_round_robin_3);
  		val64 = 0x0001020300000000ULL;
  		writeq(val64, &bar0->rx_w_round_robin_4);
  
  		val64 = 0x8080404020201010ULL;
  		writeq(val64, &bar0->rts_qos_steering);
  		break;
  	case 5:
  		val64 = 0x0001020304000102ULL;
  		writeq(val64, &bar0->rx_w_round_robin_0);
  		val64 = 0x0304000102030400ULL;
  		writeq(val64, &bar0->rx_w_round_robin_1);
  		val64 = 0x0102030400010203ULL;
  		writeq(val64, &bar0->rx_w_round_robin_2);
  		val64 = 0x0400010203040001ULL;
  		writeq(val64, &bar0->rx_w_round_robin_3);
  		val64 = 0x0203040000000000ULL;
  		writeq(val64, &bar0->rx_w_round_robin_4);
  
  		val64 = 0x8080404020201008ULL;
  		writeq(val64, &bar0->rts_qos_steering);
  		break;
  	case 6:
  		val64 = 0x0001020304050001ULL;
  		writeq(val64, &bar0->rx_w_round_robin_0);
  		val64 = 0x0203040500010203ULL;
  		writeq(val64, &bar0->rx_w_round_robin_1);
  		val64 = 0x0405000102030405ULL;
  		writeq(val64, &bar0->rx_w_round_robin_2);
  		val64 = 0x0001020304050001ULL;
  		writeq(val64, &bar0->rx_w_round_robin_3);
  		val64 = 0x0203040500000000ULL;
  		writeq(val64, &bar0->rx_w_round_robin_4);
  
  		val64 = 0x8080404020100804ULL;
  		writeq(val64, &bar0->rts_qos_steering);
  		break;
  	case 7:
  		val64 = 0x0001020304050600ULL;
  		writeq(val64, &bar0->rx_w_round_robin_0);
  		val64 = 0x0102030405060001ULL;
  		writeq(val64, &bar0->rx_w_round_robin_1);
  		val64 = 0x0203040506000102ULL;
  		writeq(val64, &bar0->rx_w_round_robin_2);
  		val64 = 0x0304050600010203ULL;
  		writeq(val64, &bar0->rx_w_round_robin_3);
  		val64 = 0x0405060000000000ULL;
  		writeq(val64, &bar0->rx_w_round_robin_4);
  
  		val64 = 0x8080402010080402ULL;
  		writeq(val64, &bar0->rts_qos_steering);
  		break;
  	case 8:
  		val64 = 0x0001020304050607ULL;
  		writeq(val64, &bar0->rx_w_round_robin_0);
  		writeq(val64, &bar0->rx_w_round_robin_1);
  		writeq(val64, &bar0->rx_w_round_robin_2);
  		writeq(val64, &bar0->rx_w_round_robin_3);
  		val64 = 0x0001020300000000ULL;
  		writeq(val64, &bar0->rx_w_round_robin_4);
  
  		val64 = 0x8040201008040201ULL;
  		writeq(val64, &bar0->rts_qos_steering);
  		break;
  	}
  
  	/* UDP Fix */
  	val64 = 0;
  	for (i = 0; i < 8; i++)
  		writeq(val64, &bar0->rts_frm_len_n[i]);
  
  	/* Set the default rts frame length for the rings configured */
  	val64 = MAC_RTS_FRM_LEN_SET(dev->mtu+22);
  	for (i = 0 ; i < config->rx_ring_num ; i++)
  		writeq(val64, &bar0->rts_frm_len_n[i]);
  
  	/* Set the frame length for the configured rings
  	 * desired by the user
  	 */
  	for (i = 0; i < config->rx_ring_num; i++) {
  		/* If rts_frm_len[i] == 0 then it is assumed that user not
  		 * specified frame length steering.
  		 * If the user provides the frame length then program
  		 * the rts_frm_len register for those values or else
  		 * leave it as it is.
  		 */
  		if (rts_frm_len[i] != 0) {
  			writeq(MAC_RTS_FRM_LEN_SET(rts_frm_len[i]),
  			       &bar0->rts_frm_len_n[i]);
  		}
  	}
  
  	/* Disable differentiated services steering logic */
  	for (i = 0; i < 64; i++) {
  		if (rts_ds_steer(nic, i, 0) == FAILURE) {
  			DBG_PRINT(ERR_DBG,
  				  "%s: rts_ds_steer failed on codepoint %d\n",
  				  dev->name, i);
  			return -ENODEV;
  		}
  	}
  
  	/* Program statistics memory */
  	writeq(mac_control->stats_mem_phy, &bar0->stat_addr);
  
  	if (nic->device_type == XFRAME_II_DEVICE) {
  		val64 = STAT_BC(0x320);
  		writeq(val64, &bar0->stat_byte_cnt);
  	}
  
  	/*
  	 * Initializing the sampling rate for the device to calculate the
  	 * bandwidth utilization.
  	 */
  	val64 = MAC_TX_LINK_UTIL_VAL(tmac_util_period) |
  		MAC_RX_LINK_UTIL_VAL(rmac_util_period);
  	writeq(val64, &bar0->mac_link_util);
  
  	/*
  	 * Initializing the Transmit and Receive Traffic Interrupt
  	 * Scheme.
  	 */
  
  	/* Initialize TTI */
  	if (SUCCESS != init_tti(nic, nic->last_link_state, true))
  		return -ENODEV;
  
  	/* RTI Initialization */
  	if (nic->device_type == XFRAME_II_DEVICE) {
  		/*
  		 * Programmed to generate Apprx 500 Intrs per
  		 * second
  		 */
  		int count = (nic->config.bus_speed * 125)/4;
  		val64 = RTI_DATA1_MEM_RX_TIMER_VAL(count);
  	} else
  		val64 = RTI_DATA1_MEM_RX_TIMER_VAL(0xFFF);
  	val64 |= RTI_DATA1_MEM_RX_URNG_A(0xA) |
  		RTI_DATA1_MEM_RX_URNG_B(0x10) |
  		RTI_DATA1_MEM_RX_URNG_C(0x30) |
  		RTI_DATA1_MEM_RX_TIMER_AC_EN;
  
  	writeq(val64, &bar0->rti_data1_mem);
  
  	val64 = RTI_DATA2_MEM_RX_UFC_A(0x1) |
  		RTI_DATA2_MEM_RX_UFC_B(0x2) ;
  	if (nic->config.intr_type == MSI_X)
  		val64 |= (RTI_DATA2_MEM_RX_UFC_C(0x20) |
  			  RTI_DATA2_MEM_RX_UFC_D(0x40));
  	else
  		val64 |= (RTI_DATA2_MEM_RX_UFC_C(0x40) |
  			  RTI_DATA2_MEM_RX_UFC_D(0x80));
  	writeq(val64, &bar0->rti_data2_mem);
  
  	for (i = 0; i < config->rx_ring_num; i++) {
  		val64 = RTI_CMD_MEM_WE |
  			RTI_CMD_MEM_STROBE_NEW_CMD |
  			RTI_CMD_MEM_OFFSET(i);
  		writeq(val64, &bar0->rti_command_mem);
  
  		/*
  		 * Once the operation completes, the Strobe bit of the
  		 * command register will be reset. We poll for this
  		 * particular condition. We wait for a maximum of 500ms
  		 * for the operation to complete, if it's not complete
  		 * by then we return error.
  		 */
  		time = 0;
  		while (true) {
  			val64 = readq(&bar0->rti_command_mem);
  			if (!(val64 & RTI_CMD_MEM_STROBE_NEW_CMD))
  				break;
  
  			if (time > 10) {
  				DBG_PRINT(ERR_DBG, "%s: RTI init failed\n",
  					  dev->name);
  				return -ENODEV;
  			}
  			time++;
  			msleep(50);
  		}
  	}
  
  	/*
  	 * Initializing proper values as Pause threshold into all
  	 * the 8 Queues on Rx side.
  	 */
  	writeq(0xffbbffbbffbbffbbULL, &bar0->mc_pause_thresh_q0q3);
  	writeq(0xffbbffbbffbbffbbULL, &bar0->mc_pause_thresh_q4q7);
  
  	/* Disable RMAC PAD STRIPPING */
  	add = &bar0->mac_cfg;
  	val64 = readq(&bar0->mac_cfg);
  	val64 &= ~(MAC_CFG_RMAC_STRIP_PAD);
  	writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
  	writel((u32) (val64), add);
  	writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
  	writel((u32) (val64 >> 32), (add + 4));
  	val64 = readq(&bar0->mac_cfg);
  
  	/* Enable FCS stripping by adapter */
  	add = &bar0->mac_cfg;
  	val64 = readq(&bar0->mac_cfg);
  	val64 |= MAC_CFG_RMAC_STRIP_FCS;
  	if (nic->device_type == XFRAME_II_DEVICE)
  		writeq(val64, &bar0->mac_cfg);
  	else {
  		writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
  		writel((u32) (val64), add);
  		writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
  		writel((u32) (val64 >> 32), (add + 4));
  	}
  
  	/*
  	 * Set the time value to be inserted in the pause frame
  	 * generated by xena.
  	 */
  	val64 = readq(&bar0->rmac_pause_cfg);
  	val64 &= ~(RMAC_PAUSE_HG_PTIME(0xffff));
  	val64 |= RMAC_PAUSE_HG_PTIME(nic->mac_control.rmac_pause_time);
  	writeq(val64, &bar0->rmac_pause_cfg);
  
  	/*
  	 * Set the Threshold Limit for Generating the pause frame
  	 * If the amount of data in any Queue exceeds ratio of
  	 * (mac_control.mc_pause_threshold_q0q3 or q4q7)/256
  	 * pause frame is generated
  	 */
  	val64 = 0;
  	for (i = 0; i < 4; i++) {
  		val64 |= (((u64)0xFF00 |
  			   nic->mac_control.mc_pause_threshold_q0q3)
  			  << (i * 2 * 8));
  	}
  	writeq(val64, &bar0->mc_pause_thresh_q0q3);
  
  	val64 = 0;
  	for (i = 0; i < 4; i++) {
  		val64 |= (((u64)0xFF00 |
  			   nic->mac_control.mc_pause_threshold_q4q7)
  			  << (i * 2 * 8));
  	}
  	writeq(val64, &bar0->mc_pause_thresh_q4q7);
  
  	/*
  	 * TxDMA will stop Read request if the number of read split has
  	 * exceeded the limit pointed by shared_splits
  	 */
  	val64 = readq(&bar0->pic_control);
  	val64 |= PIC_CNTL_SHARED_SPLITS(shared_splits);
  	writeq(val64, &bar0->pic_control);
  
  	if (nic->config.bus_speed == 266) {
  		writeq(TXREQTO_VAL(0x7f) | TXREQTO_EN, &bar0->txreqtimeout);
  		writeq(0x0, &bar0->read_retry_delay);
  		writeq(0x0, &bar0->write_retry_delay);
  	}
  
  	/*
  	 * Programming the Herc to split every write transaction
  	 * that does not start on an ADB to reduce disconnects.
  	 */
  	if (nic->device_type == XFRAME_II_DEVICE) {
  		val64 = FAULT_BEHAVIOUR | EXT_REQ_EN |
  			MISC_LINK_STABILITY_PRD(3);
  		writeq(val64, &bar0->misc_control);
  		val64 = readq(&bar0->pic_control2);
  		val64 &= ~(s2BIT(13)|s2BIT(14)|s2BIT(15));
  		writeq(val64, &bar0->pic_control2);
  	}
  	if (strstr(nic->product_name, "CX4")) {
  		val64 = TMAC_AVG_IPG(0x17);
  		writeq(val64, &bar0->tmac_avg_ipg);
  	}
  
  	return SUCCESS;
  }
  #define LINK_UP_DOWN_INTERRUPT		1
  #define MAC_RMAC_ERR_TIMER		2
  
  static int s2io_link_fault_indication(struct s2io_nic *nic)
  {
  	if (nic->device_type == XFRAME_II_DEVICE)
  		return LINK_UP_DOWN_INTERRUPT;
  	else
  		return MAC_RMAC_ERR_TIMER;
  }
  
  /**
   *  do_s2io_write_bits -  update alarm bits in alarm register
   *  @value: alarm bits
   *  @flag: interrupt status
   *  @addr: address value
   *  Description: update alarm bits in alarm register
   *  Return Value:
   *  NONE.
   */
  static void do_s2io_write_bits(u64 value, int flag, void __iomem *addr)
  {
  	u64 temp64;
  
  	temp64 = readq(addr);
  
  	if (flag == ENABLE_INTRS)
  		temp64 &= ~((u64)value);
  	else
  		temp64 |= ((u64)value);
  	writeq(temp64, addr);
  }
  
  static void en_dis_err_alarms(struct s2io_nic *nic, u16 mask, int flag)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	register u64 gen_int_mask = 0;
  	u64 interruptible;
  
  	writeq(DISABLE_ALL_INTRS, &bar0->general_int_mask);
  	if (mask & TX_DMA_INTR) {
  		gen_int_mask |= TXDMA_INT_M;
  
  		do_s2io_write_bits(TXDMA_TDA_INT | TXDMA_PFC_INT |
  				   TXDMA_PCC_INT | TXDMA_TTI_INT |
  				   TXDMA_LSO_INT | TXDMA_TPA_INT |
  				   TXDMA_SM_INT, flag, &bar0->txdma_int_mask);
  
  		do_s2io_write_bits(PFC_ECC_DB_ERR | PFC_SM_ERR_ALARM |
  				   PFC_MISC_0_ERR | PFC_MISC_1_ERR |
  				   PFC_PCIX_ERR | PFC_ECC_SG_ERR, flag,
  				   &bar0->pfc_err_mask);
  
  		do_s2io_write_bits(TDA_Fn_ECC_DB_ERR | TDA_SM0_ERR_ALARM |
  				   TDA_SM1_ERR_ALARM | TDA_Fn_ECC_SG_ERR |
  				   TDA_PCIX_ERR, flag, &bar0->tda_err_mask);
  
  		do_s2io_write_bits(PCC_FB_ECC_DB_ERR | PCC_TXB_ECC_DB_ERR |
  				   PCC_SM_ERR_ALARM | PCC_WR_ERR_ALARM |
  				   PCC_N_SERR | PCC_6_COF_OV_ERR |
  				   PCC_7_COF_OV_ERR | PCC_6_LSO_OV_ERR |
  				   PCC_7_LSO_OV_ERR | PCC_FB_ECC_SG_ERR |
  				   PCC_TXB_ECC_SG_ERR,
  				   flag, &bar0->pcc_err_mask);
  
  		do_s2io_write_bits(TTI_SM_ERR_ALARM | TTI_ECC_SG_ERR |
  				   TTI_ECC_DB_ERR, flag, &bar0->tti_err_mask);
  
  		do_s2io_write_bits(LSO6_ABORT | LSO7_ABORT |
  				   LSO6_SM_ERR_ALARM | LSO7_SM_ERR_ALARM |
  				   LSO6_SEND_OFLOW | LSO7_SEND_OFLOW,
  				   flag, &bar0->lso_err_mask);
  
  		do_s2io_write_bits(TPA_SM_ERR_ALARM | TPA_TX_FRM_DROP,
  				   flag, &bar0->tpa_err_mask);
  
  		do_s2io_write_bits(SM_SM_ERR_ALARM, flag, &bar0->sm_err_mask);
  	}
  
  	if (mask & TX_MAC_INTR) {
  		gen_int_mask |= TXMAC_INT_M;
  		do_s2io_write_bits(MAC_INT_STATUS_TMAC_INT, flag,
  				   &bar0->mac_int_mask);
  		do_s2io_write_bits(TMAC_TX_BUF_OVRN | TMAC_TX_SM_ERR |
  				   TMAC_ECC_SG_ERR | TMAC_ECC_DB_ERR |
  				   TMAC_DESC_ECC_SG_ERR | TMAC_DESC_ECC_DB_ERR,
  				   flag, &bar0->mac_tmac_err_mask);
  	}
  
  	if (mask & TX_XGXS_INTR) {
  		gen_int_mask |= TXXGXS_INT_M;
  		do_s2io_write_bits(XGXS_INT_STATUS_TXGXS, flag,
  				   &bar0->xgxs_int_mask);
  		do_s2io_write_bits(TXGXS_ESTORE_UFLOW | TXGXS_TX_SM_ERR |
  				   TXGXS_ECC_SG_ERR | TXGXS_ECC_DB_ERR,
  				   flag, &bar0->xgxs_txgxs_err_mask);
  	}
  
  	if (mask & RX_DMA_INTR) {
  		gen_int_mask |= RXDMA_INT_M;
  		do_s2io_write_bits(RXDMA_INT_RC_INT_M | RXDMA_INT_RPA_INT_M |
  				   RXDMA_INT_RDA_INT_M | RXDMA_INT_RTI_INT_M,
  				   flag, &bar0->rxdma_int_mask);
  		do_s2io_write_bits(RC_PRCn_ECC_DB_ERR | RC_FTC_ECC_DB_ERR |
  				   RC_PRCn_SM_ERR_ALARM | RC_FTC_SM_ERR_ALARM |
  				   RC_PRCn_ECC_SG_ERR | RC_FTC_ECC_SG_ERR |
  				   RC_RDA_FAIL_WR_Rn, flag, &bar0->rc_err_mask);
  		do_s2io_write_bits(PRC_PCI_AB_RD_Rn | PRC_PCI_AB_WR_Rn |
  				   PRC_PCI_AB_F_WR_Rn | PRC_PCI_DP_RD_Rn |
  				   PRC_PCI_DP_WR_Rn | PRC_PCI_DP_F_WR_Rn, flag,
  				   &bar0->prc_pcix_err_mask);
  		do_s2io_write_bits(RPA_SM_ERR_ALARM | RPA_CREDIT_ERR |
  				   RPA_ECC_SG_ERR | RPA_ECC_DB_ERR, flag,
  				   &bar0->rpa_err_mask);
  		do_s2io_write_bits(RDA_RXDn_ECC_DB_ERR | RDA_FRM_ECC_DB_N_AERR |
  				   RDA_SM1_ERR_ALARM | RDA_SM0_ERR_ALARM |
  				   RDA_RXD_ECC_DB_SERR | RDA_RXDn_ECC_SG_ERR |
  				   RDA_FRM_ECC_SG_ERR |
  				   RDA_MISC_ERR|RDA_PCIX_ERR,
  				   flag, &bar0->rda_err_mask);
  		do_s2io_write_bits(RTI_SM_ERR_ALARM |
  				   RTI_ECC_SG_ERR | RTI_ECC_DB_ERR,
  				   flag, &bar0->rti_err_mask);
  	}
  
  	if (mask & RX_MAC_INTR) {
  		gen_int_mask |= RXMAC_INT_M;
  		do_s2io_write_bits(MAC_INT_STATUS_RMAC_INT, flag,
  				   &bar0->mac_int_mask);
  		interruptible = (RMAC_RX_BUFF_OVRN | RMAC_RX_SM_ERR |
  				 RMAC_UNUSED_INT | RMAC_SINGLE_ECC_ERR |
  				 RMAC_DOUBLE_ECC_ERR);
  		if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER)
  			interruptible |= RMAC_LINK_STATE_CHANGE_INT;
  		do_s2io_write_bits(interruptible,
  				   flag, &bar0->mac_rmac_err_mask);
  	}
  
  	if (mask & RX_XGXS_INTR) {
  		gen_int_mask |= RXXGXS_INT_M;
  		do_s2io_write_bits(XGXS_INT_STATUS_RXGXS, flag,
  				   &bar0->xgxs_int_mask);
  		do_s2io_write_bits(RXGXS_ESTORE_OFLOW | RXGXS_RX_SM_ERR, flag,
  				   &bar0->xgxs_rxgxs_err_mask);
  	}
  
  	if (mask & MC_INTR) {
  		gen_int_mask |= MC_INT_M;
  		do_s2io_write_bits(MC_INT_MASK_MC_INT,
  				   flag, &bar0->mc_int_mask);
  		do_s2io_write_bits(MC_ERR_REG_SM_ERR | MC_ERR_REG_ECC_ALL_SNG |
  				   MC_ERR_REG_ECC_ALL_DBL | PLL_LOCK_N, flag,
  				   &bar0->mc_err_mask);
  	}
  	nic->general_int_mask = gen_int_mask;
  
  	/* Remove this line when alarm interrupts are enabled */
  	nic->general_int_mask = 0;
  }
  
  /**
   *  en_dis_able_nic_intrs - Enable or Disable the interrupts
   *  @nic: device private variable,
   *  @mask: A mask indicating which Intr block must be modified and,
   *  @flag: A flag indicating whether to enable or disable the Intrs.
   *  Description: This function will either disable or enable the interrupts
   *  depending on the flag argument. The mask argument can be used to
   *  enable/disable any Intr block.
   *  Return Value: NONE.
   */
  
  static void en_dis_able_nic_intrs(struct s2io_nic *nic, u16 mask, int flag)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	register u64 temp64 = 0, intr_mask = 0;
  
  	intr_mask = nic->general_int_mask;
  
  	/*  Top level interrupt classification */
  	/*  PIC Interrupts */
  	if (mask & TX_PIC_INTR) {
  		/*  Enable PIC Intrs in the general intr mask register */
  		intr_mask |= TXPIC_INT_M;
  		if (flag == ENABLE_INTRS) {
  			/*
  			 * If Hercules adapter enable GPIO otherwise
  			 * disable all PCIX, Flash, MDIO, IIC and GPIO
  			 * interrupts for now.
  			 * TODO
  			 */
  			if (s2io_link_fault_indication(nic) ==
  			    LINK_UP_DOWN_INTERRUPT) {
  				do_s2io_write_bits(PIC_INT_GPIO, flag,
  						   &bar0->pic_int_mask);
  				do_s2io_write_bits(GPIO_INT_MASK_LINK_UP, flag,
  						   &bar0->gpio_int_mask);
  			} else
  				writeq(DISABLE_ALL_INTRS, &bar0->pic_int_mask);
  		} else if (flag == DISABLE_INTRS) {
  			/*
  			 * Disable PIC Intrs in the general
  			 * intr mask register
  			 */
  			writeq(DISABLE_ALL_INTRS, &bar0->pic_int_mask);
  		}
  	}
  
  	/*  Tx traffic interrupts */
  	if (mask & TX_TRAFFIC_INTR) {
  		intr_mask |= TXTRAFFIC_INT_M;
  		if (flag == ENABLE_INTRS) {
  			/*
  			 * Enable all the Tx side interrupts
  			 * writing 0 Enables all 64 TX interrupt levels
  			 */
  			writeq(0x0, &bar0->tx_traffic_mask);
  		} else if (flag == DISABLE_INTRS) {
  			/*
  			 * Disable Tx Traffic Intrs in the general intr mask
  			 * register.
  			 */
  			writeq(DISABLE_ALL_INTRS, &bar0->tx_traffic_mask);
  		}
  	}
  
  	/*  Rx traffic interrupts */
  	if (mask & RX_TRAFFIC_INTR) {
  		intr_mask |= RXTRAFFIC_INT_M;
  		if (flag == ENABLE_INTRS) {
  			/* writing 0 Enables all 8 RX interrupt levels */
  			writeq(0x0, &bar0->rx_traffic_mask);
  		} else if (flag == DISABLE_INTRS) {
  			/*
  			 * Disable Rx Traffic Intrs in the general intr mask
  			 * register.
  			 */
  			writeq(DISABLE_ALL_INTRS, &bar0->rx_traffic_mask);
  		}
  	}
  
  	temp64 = readq(&bar0->general_int_mask);
  	if (flag == ENABLE_INTRS)
  		temp64 &= ~((u64)intr_mask);
  	else
  		temp64 = DISABLE_ALL_INTRS;
  	writeq(temp64, &bar0->general_int_mask);
  
  	nic->general_int_mask = readq(&bar0->general_int_mask);
  }
  
  /**
   *  verify_pcc_quiescent- Checks for PCC quiescent state
   *  @sp : private member of the device structure, which is a pointer to the
   *  s2io_nic structure.
   *  @flag: boolean controlling function path
   *  Return: 1 If PCC is quiescence
   *          0 If PCC is not quiescence
   */
  static int verify_pcc_quiescent(struct s2io_nic *sp, int flag)
  {
  	int ret = 0, herc;
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u64 val64 = readq(&bar0->adapter_status);
  
  	herc = (sp->device_type == XFRAME_II_DEVICE);
  
  	if (flag == false) {
  		if ((!herc && (sp->pdev->revision >= 4)) || herc) {
  			if (!(val64 & ADAPTER_STATUS_RMAC_PCC_IDLE))
  				ret = 1;
  		} else {
  			if (!(val64 & ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE))
  				ret = 1;
  		}
  	} else {
  		if ((!herc && (sp->pdev->revision >= 4)) || herc) {
  			if (((val64 & ADAPTER_STATUS_RMAC_PCC_IDLE) ==
  			     ADAPTER_STATUS_RMAC_PCC_IDLE))
  				ret = 1;
  		} else {
  			if (((val64 & ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE) ==
  			     ADAPTER_STATUS_RMAC_PCC_FOUR_IDLE))
  				ret = 1;
  		}
  	}
  
  	return ret;
  }
  /**
   *  verify_xena_quiescence - Checks whether the H/W is ready
   *  @sp : private member of the device structure, which is a pointer to the
   *  s2io_nic structure.
   *  Description: Returns whether the H/W is ready to go or not. Depending
   *  on whether adapter enable bit was written or not the comparison
   *  differs and the calling function passes the input argument flag to
   *  indicate this.
   *  Return: 1 If xena is quiescence
   *          0 If Xena is not quiescence
   */
  
  static int verify_xena_quiescence(struct s2io_nic *sp)
  {
  	int  mode;
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u64 val64 = readq(&bar0->adapter_status);
  	mode = s2io_verify_pci_mode(sp);
  
  	if (!(val64 & ADAPTER_STATUS_TDMA_READY)) {
  		DBG_PRINT(ERR_DBG, "TDMA is not ready!\n");
  		return 0;
  	}
  	if (!(val64 & ADAPTER_STATUS_RDMA_READY)) {
  		DBG_PRINT(ERR_DBG, "RDMA is not ready!\n");
  		return 0;
  	}
  	if (!(val64 & ADAPTER_STATUS_PFC_READY)) {
  		DBG_PRINT(ERR_DBG, "PFC is not ready!\n");
  		return 0;
  	}
  	if (!(val64 & ADAPTER_STATUS_TMAC_BUF_EMPTY)) {
  		DBG_PRINT(ERR_DBG, "TMAC BUF is not empty!\n");
  		return 0;
  	}
  	if (!(val64 & ADAPTER_STATUS_PIC_QUIESCENT)) {
  		DBG_PRINT(ERR_DBG, "PIC is not QUIESCENT!\n");
  		return 0;
  	}
  	if (!(val64 & ADAPTER_STATUS_MC_DRAM_READY)) {
  		DBG_PRINT(ERR_DBG, "MC_DRAM is not ready!\n");
  		return 0;
  	}
  	if (!(val64 & ADAPTER_STATUS_MC_QUEUES_READY)) {
  		DBG_PRINT(ERR_DBG, "MC_QUEUES is not ready!\n");
  		return 0;
  	}
  	if (!(val64 & ADAPTER_STATUS_M_PLL_LOCK)) {
  		DBG_PRINT(ERR_DBG, "M_PLL is not locked!\n");
  		return 0;
  	}
  
  	/*
  	 * In PCI 33 mode, the P_PLL is not used, and therefore,
  	 * the the P_PLL_LOCK bit in the adapter_status register will
  	 * not be asserted.
  	 */
  	if (!(val64 & ADAPTER_STATUS_P_PLL_LOCK) &&
  	    sp->device_type == XFRAME_II_DEVICE &&
  	    mode != PCI_MODE_PCI_33) {
  		DBG_PRINT(ERR_DBG, "P_PLL is not locked!\n");
  		return 0;
  	}
  	if (!((val64 & ADAPTER_STATUS_RC_PRC_QUIESCENT) ==
  	      ADAPTER_STATUS_RC_PRC_QUIESCENT)) {
  		DBG_PRINT(ERR_DBG, "RC_PRC is not QUIESCENT!\n");
  		return 0;
  	}
  	return 1;
  }
  
  /**
   * fix_mac_address -  Fix for Mac addr problem on Alpha platforms
   * @sp: Pointer to device specifc structure
   * Description :
   * New procedure to clear mac address reading  problems on Alpha platforms
   *
   */
  
  static void fix_mac_address(struct s2io_nic *sp)
  {
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	int i = 0;
  
  	while (fix_mac[i] != END_SIGN) {
  		writeq(fix_mac[i++], &bar0->gpio_control);
  		udelay(10);
  		(void) readq(&bar0->gpio_control);
  	}
  }
  
  /**
   *  start_nic - Turns the device on
   *  @nic : device private variable.
   *  Description:
   *  This function actually turns the device on. Before this  function is
   *  called,all Registers are configured from their reset states
   *  and shared memory is allocated but the NIC is still quiescent. On
   *  calling this function, the device interrupts are cleared and the NIC is
   *  literally switched on by writing into the adapter control register.
   *  Return Value:
   *  SUCCESS on success and -1 on failure.
   */
  
  static int start_nic(struct s2io_nic *nic)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	struct net_device *dev = nic->dev;
  	register u64 val64 = 0;
  	u16 subid, i;
  	struct config_param *config = &nic->config;
  	struct mac_info *mac_control = &nic->mac_control;
  
  	/*  PRC Initialization and configuration */
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct ring_info *ring = &mac_control->rings[i];
  
  		writeq((u64)ring->rx_blocks[0].block_dma_addr,
  		       &bar0->prc_rxd0_n[i]);
  
  		val64 = readq(&bar0->prc_ctrl_n[i]);
  		if (nic->rxd_mode == RXD_MODE_1)
  			val64 |= PRC_CTRL_RC_ENABLED;
  		else
  			val64 |= PRC_CTRL_RC_ENABLED | PRC_CTRL_RING_MODE_3;
  		if (nic->device_type == XFRAME_II_DEVICE)
  			val64 |= PRC_CTRL_GROUP_READS;
  		val64 &= ~PRC_CTRL_RXD_BACKOFF_INTERVAL(0xFFFFFF);
  		val64 |= PRC_CTRL_RXD_BACKOFF_INTERVAL(0x1000);
  		writeq(val64, &bar0->prc_ctrl_n[i]);
  	}
  
  	if (nic->rxd_mode == RXD_MODE_3B) {
  		/* Enabling 2 buffer mode by writing into Rx_pa_cfg reg. */
  		val64 = readq(&bar0->rx_pa_cfg);
  		val64 |= RX_PA_CFG_IGNORE_L2_ERR;
  		writeq(val64, &bar0->rx_pa_cfg);
  	}
  
  	if (vlan_tag_strip == 0) {
  		val64 = readq(&bar0->rx_pa_cfg);
  		val64 &= ~RX_PA_CFG_STRIP_VLAN_TAG;
  		writeq(val64, &bar0->rx_pa_cfg);
  		nic->vlan_strip_flag = 0;
  	}
  
  	/*
  	 * Enabling MC-RLDRAM. After enabling the device, we timeout
  	 * for around 100ms, which is approximately the time required
  	 * for the device to be ready for operation.
  	 */
  	val64 = readq(&bar0->mc_rldram_mrs);
  	val64 |= MC_RLDRAM_QUEUE_SIZE_ENABLE | MC_RLDRAM_MRS_ENABLE;
  	SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_mrs, UF);
  	val64 = readq(&bar0->mc_rldram_mrs);
  
  	msleep(100);	/* Delay by around 100 ms. */
  
  	/* Enabling ECC Protection. */
  	val64 = readq(&bar0->adapter_control);
  	val64 &= ~ADAPTER_ECC_EN;
  	writeq(val64, &bar0->adapter_control);
  
  	/*
  	 * Verify if the device is ready to be enabled, if so enable
  	 * it.
  	 */
  	val64 = readq(&bar0->adapter_status);
  	if (!verify_xena_quiescence(nic)) {
  		DBG_PRINT(ERR_DBG, "%s: device is not ready, "
  			  "Adapter status reads: 0x%llx\n",
  			  dev->name, (unsigned long long)val64);
  		return FAILURE;
  	}
  
  	/*
  	 * With some switches, link might be already up at this point.
  	 * Because of this weird behavior, when we enable laser,
  	 * we may not get link. We need to handle this. We cannot
  	 * figure out which switch is misbehaving. So we are forced to
  	 * make a global change.
  	 */
  
  	/* Enabling Laser. */
  	val64 = readq(&bar0->adapter_control);
  	val64 |= ADAPTER_EOI_TX_ON;
  	writeq(val64, &bar0->adapter_control);
  
  	if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER) {
  		/*
  		 * Dont see link state interrupts initially on some switches,
  		 * so directly scheduling the link state task here.
  		 */
  		schedule_work(&nic->set_link_task);
  	}
  	/* SXE-002: Initialize link and activity LED */
  	subid = nic->pdev->subsystem_device;
  	if (((subid & 0xFF) >= 0x07) &&
  	    (nic->device_type == XFRAME_I_DEVICE)) {
  		val64 = readq(&bar0->gpio_control);
  		val64 |= 0x0000800000000000ULL;
  		writeq(val64, &bar0->gpio_control);
  		val64 = 0x0411040400000000ULL;
  		writeq(val64, (void __iomem *)bar0 + 0x2700);
  	}
  
  	return SUCCESS;
  }
  /**
   * s2io_txdl_getskb - Get the skb from txdl, unmap and return skb
   * @fifo_data: fifo data pointer
   * @txdlp: descriptor
   * @get_off: unused
   */
  static struct sk_buff *s2io_txdl_getskb(struct fifo_info *fifo_data,
  					struct TxD *txdlp, int get_off)
  {
  	struct s2io_nic *nic = fifo_data->nic;
  	struct sk_buff *skb;
  	struct TxD *txds;
  	u16 j, frg_cnt;
  
  	txds = txdlp;
  	if (txds->Host_Control == (u64)(long)fifo_data->ufo_in_band_v) {
  		dma_unmap_single(&nic->pdev->dev,
  				 (dma_addr_t)txds->Buffer_Pointer,
  				 sizeof(u64), DMA_TO_DEVICE);
  		txds++;
  	}
  
  	skb = (struct sk_buff *)((unsigned long)txds->Host_Control);
  	if (!skb) {
  		memset(txdlp, 0, (sizeof(struct TxD) * fifo_data->max_txds));
  		return NULL;
  	}
  	dma_unmap_single(&nic->pdev->dev, (dma_addr_t)txds->Buffer_Pointer,
  			 skb_headlen(skb), DMA_TO_DEVICE);
  	frg_cnt = skb_shinfo(skb)->nr_frags;
  	if (frg_cnt) {
  		txds++;
  		for (j = 0; j < frg_cnt; j++, txds++) {
  			const skb_frag_t *frag = &skb_shinfo(skb)->frags[j];
  			if (!txds->Buffer_Pointer)
  				break;
  			dma_unmap_page(&nic->pdev->dev,
  				       (dma_addr_t)txds->Buffer_Pointer,
  				       skb_frag_size(frag), DMA_TO_DEVICE);
  		}
  	}
  	memset(txdlp, 0, (sizeof(struct TxD) * fifo_data->max_txds));
  	return skb;
  }
  
  /**
   *  free_tx_buffers - Free all queued Tx buffers
   *  @nic : device private variable.
   *  Description:
   *  Free all queued Tx buffers.
   *  Return Value: void
   */
  
  static void free_tx_buffers(struct s2io_nic *nic)
  {
  	struct net_device *dev = nic->dev;
  	struct sk_buff *skb;
  	struct TxD *txdp;
  	int i, j;
  	int cnt = 0;
  	struct config_param *config = &nic->config;
  	struct mac_info *mac_control = &nic->mac_control;
  	struct stat_block *stats = mac_control->stats_info;
  	struct swStat *swstats = &stats->sw_stat;
  
  	for (i = 0; i < config->tx_fifo_num; i++) {
  		struct tx_fifo_config *tx_cfg = &config->tx_cfg[i];
  		struct fifo_info *fifo = &mac_control->fifos[i];
  		unsigned long flags;
  
  		spin_lock_irqsave(&fifo->tx_lock, flags);
  		for (j = 0; j < tx_cfg->fifo_len; j++) {
  			txdp = fifo->list_info[j].list_virt_addr;
  			skb = s2io_txdl_getskb(&mac_control->fifos[i], txdp, j);
  			if (skb) {
  				swstats->mem_freed += skb->truesize;
  				dev_kfree_skb(skb);
  				cnt++;
  			}
  		}
  		DBG_PRINT(INTR_DBG,
  			  "%s: forcibly freeing %d skbs on FIFO%d\n",
  			  dev->name, cnt, i);
  		fifo->tx_curr_get_info.offset = 0;
  		fifo->tx_curr_put_info.offset = 0;
  		spin_unlock_irqrestore(&fifo->tx_lock, flags);
  	}
  }
  
  /**
   *   stop_nic -  To stop the nic
   *   @nic : device private variable.
   *   Description:
   *   This function does exactly the opposite of what the start_nic()
   *   function does. This function is called to stop the device.
   *   Return Value:
   *   void.
   */
  
  static void stop_nic(struct s2io_nic *nic)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	register u64 val64 = 0;
  	u16 interruptible;
  
  	/*  Disable all interrupts */
  	en_dis_err_alarms(nic, ENA_ALL_INTRS, DISABLE_INTRS);
  	interruptible = TX_TRAFFIC_INTR | RX_TRAFFIC_INTR;
  	interruptible |= TX_PIC_INTR;
  	en_dis_able_nic_intrs(nic, interruptible, DISABLE_INTRS);
  
  	/* Clearing Adapter_En bit of ADAPTER_CONTROL Register */
  	val64 = readq(&bar0->adapter_control);
  	val64 &= ~(ADAPTER_CNTL_EN);
  	writeq(val64, &bar0->adapter_control);
  }
  
  /**
   *  fill_rx_buffers - Allocates the Rx side skbs
   *  @nic : device private variable.
   *  @ring: per ring structure
   *  @from_card_up: If this is true, we will map the buffer to get
   *     the dma address for buf0 and buf1 to give it to the card.
   *     Else we will sync the already mapped buffer to give it to the card.
   *  Description:
   *  The function allocates Rx side skbs and puts the physical
   *  address of these buffers into the RxD buffer pointers, so that the NIC
   *  can DMA the received frame into these locations.
   *  The NIC supports 3 receive modes, viz
   *  1. single buffer,
   *  2. three buffer and
   *  3. Five buffer modes.
   *  Each mode defines how many fragments the received frame will be split
   *  up into by the NIC. The frame is split into L3 header, L4 Header,
   *  L4 payload in three buffer mode and in 5 buffer mode, L4 payload itself
   *  is split into 3 fragments. As of now only single buffer mode is
   *  supported.
   *   Return Value:
   *  SUCCESS on success or an appropriate -ve value on failure.
   */
  static int fill_rx_buffers(struct s2io_nic *nic, struct ring_info *ring,
  			   int from_card_up)
  {
  	struct sk_buff *skb;
  	struct RxD_t *rxdp;
  	int off, size, block_no, block_no1;
  	u32 alloc_tab = 0;
  	u32 alloc_cnt;
  	u64 tmp;
  	struct buffAdd *ba;
  	struct RxD_t *first_rxdp = NULL;
  	u64 Buffer0_ptr = 0, Buffer1_ptr = 0;
  	struct RxD1 *rxdp1;
  	struct RxD3 *rxdp3;
  	struct swStat *swstats = &ring->nic->mac_control.stats_info->sw_stat;
  
  	alloc_cnt = ring->pkt_cnt - ring->rx_bufs_left;
  
  	block_no1 = ring->rx_curr_get_info.block_index;
  	while (alloc_tab < alloc_cnt) {
  		block_no = ring->rx_curr_put_info.block_index;
  
  		off = ring->rx_curr_put_info.offset;
  
  		rxdp = ring->rx_blocks[block_no].rxds[off].virt_addr;
  
  		if ((block_no == block_no1) &&
  		    (off == ring->rx_curr_get_info.offset) &&
  		    (rxdp->Host_Control)) {
  			DBG_PRINT(INTR_DBG, "%s: Get and Put info equated\n",
  				  ring->dev->name);
  			goto end;
  		}
  		if (off && (off == ring->rxd_count)) {
  			ring->rx_curr_put_info.block_index++;
  			if (ring->rx_curr_put_info.block_index ==
  			    ring->block_count)
  				ring->rx_curr_put_info.block_index = 0;
  			block_no = ring->rx_curr_put_info.block_index;
  			off = 0;
  			ring->rx_curr_put_info.offset = off;
  			rxdp = ring->rx_blocks[block_no].block_virt_addr;
  			DBG_PRINT(INTR_DBG, "%s: Next block at: %p\n",
  				  ring->dev->name, rxdp);
  
  		}
  
  		if ((rxdp->Control_1 & RXD_OWN_XENA) &&
  		    ((ring->rxd_mode == RXD_MODE_3B) &&
  		     (rxdp->Control_2 & s2BIT(0)))) {
  			ring->rx_curr_put_info.offset = off;
  			goto end;
  		}
  		/* calculate size of skb based on ring mode */
  		size = ring->mtu +
  			HEADER_ETHERNET_II_802_3_SIZE +
  			HEADER_802_2_SIZE + HEADER_SNAP_SIZE;
  		if (ring->rxd_mode == RXD_MODE_1)
  			size += NET_IP_ALIGN;
  		else
  			size = ring->mtu + ALIGN_SIZE + BUF0_LEN + 4;
  
  		/* allocate skb */
  		skb = netdev_alloc_skb(nic->dev, size);
  		if (!skb) {
  			DBG_PRINT(INFO_DBG, "%s: Could not allocate skb\n",
  				  ring->dev->name);
  			if (first_rxdp) {
  				dma_wmb();
  				first_rxdp->Control_1 |= RXD_OWN_XENA;
  			}
  			swstats->mem_alloc_fail_cnt++;
  
  			return -ENOMEM ;
  		}
  		swstats->mem_allocated += skb->truesize;
  
  		if (ring->rxd_mode == RXD_MODE_1) {
  			/* 1 buffer mode - normal operation mode */
  			rxdp1 = (struct RxD1 *)rxdp;
  			memset(rxdp, 0, sizeof(struct RxD1));
  			skb_reserve(skb, NET_IP_ALIGN);
  			rxdp1->Buffer0_ptr =
  				dma_map_single(&ring->pdev->dev, skb->data,
  					       size - NET_IP_ALIGN,
  					       DMA_FROM_DEVICE);
  			if (dma_mapping_error(&nic->pdev->dev, rxdp1->Buffer0_ptr))
  				goto pci_map_failed;
  
  			rxdp->Control_2 =
  				SET_BUFFER0_SIZE_1(size - NET_IP_ALIGN);
  			rxdp->Host_Control = (unsigned long)skb;
  		} else if (ring->rxd_mode == RXD_MODE_3B) {
  			/*
  			 * 2 buffer mode -
  			 * 2 buffer mode provides 128
  			 * byte aligned receive buffers.
  			 */
  
  			rxdp3 = (struct RxD3 *)rxdp;
  			/* save buffer pointers to avoid frequent dma mapping */
  			Buffer0_ptr = rxdp3->Buffer0_ptr;
  			Buffer1_ptr = rxdp3->Buffer1_ptr;
  			memset(rxdp, 0, sizeof(struct RxD3));
  			/* restore the buffer pointers for dma sync*/
  			rxdp3->Buffer0_ptr = Buffer0_ptr;
  			rxdp3->Buffer1_ptr = Buffer1_ptr;
  
  			ba = &ring->ba[block_no][off];
  			skb_reserve(skb, BUF0_LEN);
  			tmp = (u64)(unsigned long)skb->data;
  			tmp += ALIGN_SIZE;
  			tmp &= ~ALIGN_SIZE;
  			skb->data = (void *) (unsigned long)tmp;
  			skb_reset_tail_pointer(skb);
  
  			if (from_card_up) {
  				rxdp3->Buffer0_ptr =
  					dma_map_single(&ring->pdev->dev,
  						       ba->ba_0, BUF0_LEN,
  						       DMA_FROM_DEVICE);
  				if (dma_mapping_error(&nic->pdev->dev, rxdp3->Buffer0_ptr))
  					goto pci_map_failed;
  			} else
  				dma_sync_single_for_device(&ring->pdev->dev,
  							   (dma_addr_t)rxdp3->Buffer0_ptr,
  							   BUF0_LEN,
  							   DMA_FROM_DEVICE);
  
  			rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN);
  			if (ring->rxd_mode == RXD_MODE_3B) {
  				/* Two buffer mode */
  
  				/*
  				 * Buffer2 will have L3/L4 header plus
  				 * L4 payload
  				 */
  				rxdp3->Buffer2_ptr = dma_map_single(&ring->pdev->dev,
  								    skb->data,
  								    ring->mtu + 4,
  								    DMA_FROM_DEVICE);
  
  				if (dma_mapping_error(&nic->pdev->dev, rxdp3->Buffer2_ptr))
  					goto pci_map_failed;
  
  				if (from_card_up) {
  					rxdp3->Buffer1_ptr =
  						dma_map_single(&ring->pdev->dev,
  							       ba->ba_1,
  							       BUF1_LEN,
  							       DMA_FROM_DEVICE);
  
  					if (dma_mapping_error(&nic->pdev->dev,
  							      rxdp3->Buffer1_ptr)) {
  						dma_unmap_single(&ring->pdev->dev,
  								 (dma_addr_t)(unsigned long)
  								 skb->data,
  								 ring->mtu + 4,
  								 DMA_FROM_DEVICE);
  						goto pci_map_failed;
  					}
  				}
  				rxdp->Control_2 |= SET_BUFFER1_SIZE_3(1);
  				rxdp->Control_2 |= SET_BUFFER2_SIZE_3
  					(ring->mtu + 4);
  			}
  			rxdp->Control_2 |= s2BIT(0);
  			rxdp->Host_Control = (unsigned long) (skb);
  		}
  		if (alloc_tab & ((1 << rxsync_frequency) - 1))
  			rxdp->Control_1 |= RXD_OWN_XENA;
  		off++;
  		if (off == (ring->rxd_count + 1))
  			off = 0;
  		ring->rx_curr_put_info.offset = off;
  
  		rxdp->Control_2 |= SET_RXD_MARKER;
  		if (!(alloc_tab & ((1 << rxsync_frequency) - 1))) {
  			if (first_rxdp) {
  				dma_wmb();
  				first_rxdp->Control_1 |= RXD_OWN_XENA;
  			}
  			first_rxdp = rxdp;
  		}
  		ring->rx_bufs_left += 1;
  		alloc_tab++;
  	}
  
  end:
  	/* Transfer ownership of first descriptor to adapter just before
  	 * exiting. Before that, use memory barrier so that ownership
  	 * and other fields are seen by adapter correctly.
  	 */
  	if (first_rxdp) {
  		dma_wmb();
  		first_rxdp->Control_1 |= RXD_OWN_XENA;
  	}
  
  	return SUCCESS;
  
  pci_map_failed:
  	swstats->pci_map_fail_cnt++;
  	swstats->mem_freed += skb->truesize;
  	dev_kfree_skb_irq(skb);
  	return -ENOMEM;
  }
  
  static void free_rxd_blk(struct s2io_nic *sp, int ring_no, int blk)
  {
  	struct net_device *dev = sp->dev;
  	int j;
  	struct sk_buff *skb;
  	struct RxD_t *rxdp;
  	struct RxD1 *rxdp1;
  	struct RxD3 *rxdp3;
  	struct mac_info *mac_control = &sp->mac_control;
  	struct stat_block *stats = mac_control->stats_info;
  	struct swStat *swstats = &stats->sw_stat;
  
  	for (j = 0 ; j < rxd_count[sp->rxd_mode]; j++) {
  		rxdp = mac_control->rings[ring_no].
  			rx_blocks[blk].rxds[j].virt_addr;
  		skb = (struct sk_buff *)((unsigned long)rxdp->Host_Control);
  		if (!skb)
  			continue;
  		if (sp->rxd_mode == RXD_MODE_1) {
  			rxdp1 = (struct RxD1 *)rxdp;
  			dma_unmap_single(&sp->pdev->dev,
  					 (dma_addr_t)rxdp1->Buffer0_ptr,
  					 dev->mtu +
  					 HEADER_ETHERNET_II_802_3_SIZE +
  					 HEADER_802_2_SIZE + HEADER_SNAP_SIZE,
  					 DMA_FROM_DEVICE);
  			memset(rxdp, 0, sizeof(struct RxD1));
  		} else if (sp->rxd_mode == RXD_MODE_3B) {
  			rxdp3 = (struct RxD3 *)rxdp;
  			dma_unmap_single(&sp->pdev->dev,
  					 (dma_addr_t)rxdp3->Buffer0_ptr,
  					 BUF0_LEN, DMA_FROM_DEVICE);
  			dma_unmap_single(&sp->pdev->dev,
  					 (dma_addr_t)rxdp3->Buffer1_ptr,
  					 BUF1_LEN, DMA_FROM_DEVICE);
  			dma_unmap_single(&sp->pdev->dev,
  					 (dma_addr_t)rxdp3->Buffer2_ptr,
  					 dev->mtu + 4, DMA_FROM_DEVICE);
  			memset(rxdp, 0, sizeof(struct RxD3));
  		}
  		swstats->mem_freed += skb->truesize;
  		dev_kfree_skb(skb);
  		mac_control->rings[ring_no].rx_bufs_left -= 1;
  	}
  }
  
  /**
   *  free_rx_buffers - Frees all Rx buffers
   *  @sp: device private variable.
   *  Description:
   *  This function will free all Rx buffers allocated by host.
   *  Return Value:
   *  NONE.
   */
  
  static void free_rx_buffers(struct s2io_nic *sp)
  {
  	struct net_device *dev = sp->dev;
  	int i, blk = 0, buf_cnt = 0;
  	struct config_param *config = &sp->config;
  	struct mac_info *mac_control = &sp->mac_control;
  
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct ring_info *ring = &mac_control->rings[i];
  
  		for (blk = 0; blk < rx_ring_sz[i]; blk++)
  			free_rxd_blk(sp, i, blk);
  
  		ring->rx_curr_put_info.block_index = 0;
  		ring->rx_curr_get_info.block_index = 0;
  		ring->rx_curr_put_info.offset = 0;
  		ring->rx_curr_get_info.offset = 0;
  		ring->rx_bufs_left = 0;
  		DBG_PRINT(INIT_DBG, "%s: Freed 0x%x Rx Buffers on ring%d\n",
  			  dev->name, buf_cnt, i);
  	}
  }
  
  static int s2io_chk_rx_buffers(struct s2io_nic *nic, struct ring_info *ring)
  {
  	if (fill_rx_buffers(nic, ring, 0) == -ENOMEM) {
  		DBG_PRINT(INFO_DBG, "%s: Out of memory in Rx Intr!!\n",
  			  ring->dev->name);
  	}
  	return 0;
  }
  
  /**
   * s2io_poll_msix - Rx interrupt handler for NAPI support
   * @napi : pointer to the napi structure.
   * @budget : The number of packets that were budgeted to be processed
   * during  one pass through the 'Poll" function.
   * Description:
   * Comes into picture only if NAPI support has been incorporated. It does
   * the same thing that rx_intr_handler does, but not in a interrupt context
   * also It will process only a given number of packets.
   * Return value:
   * 0 on success and 1 if there are No Rx packets to be processed.
   */
  
  static int s2io_poll_msix(struct napi_struct *napi, int budget)
  {
  	struct ring_info *ring = container_of(napi, struct ring_info, napi);
  	struct net_device *dev = ring->dev;
  	int pkts_processed = 0;
  	u8 __iomem *addr = NULL;
  	u8 val8 = 0;
  	struct s2io_nic *nic = netdev_priv(dev);
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	int budget_org = budget;
  
  	if (unlikely(!is_s2io_card_up(nic)))
  		return 0;
  
  	pkts_processed = rx_intr_handler(ring, budget);
  	s2io_chk_rx_buffers(nic, ring);
  
  	if (pkts_processed < budget_org) {
  		napi_complete_done(napi, pkts_processed);
  		/*Re Enable MSI-Rx Vector*/
  		addr = (u8 __iomem *)&bar0->xmsi_mask_reg;
  		addr += 7 - ring->ring_no;
  		val8 = (ring->ring_no == 0) ? 0x3f : 0xbf;
  		writeb(val8, addr);
  		val8 = readb(addr);
  	}
  	return pkts_processed;
  }
  
  static int s2io_poll_inta(struct napi_struct *napi, int budget)
  {
  	struct s2io_nic *nic = container_of(napi, struct s2io_nic, napi);
  	int pkts_processed = 0;
  	int ring_pkts_processed, i;
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	int budget_org = budget;
  	struct config_param *config = &nic->config;
  	struct mac_info *mac_control = &nic->mac_control;
  
  	if (unlikely(!is_s2io_card_up(nic)))
  		return 0;
  
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct ring_info *ring = &mac_control->rings[i];
  		ring_pkts_processed = rx_intr_handler(ring, budget);
  		s2io_chk_rx_buffers(nic, ring);
  		pkts_processed += ring_pkts_processed;
  		budget -= ring_pkts_processed;
  		if (budget <= 0)
  			break;
  	}
  	if (pkts_processed < budget_org) {
  		napi_complete_done(napi, pkts_processed);
  		/* Re enable the Rx interrupts for the ring */
  		writeq(0, &bar0->rx_traffic_mask);
  		readl(&bar0->rx_traffic_mask);
  	}
  	return pkts_processed;
  }
  
  #ifdef CONFIG_NET_POLL_CONTROLLER
  /**
   * s2io_netpoll - netpoll event handler entry point
   * @dev : pointer to the device structure.
   * Description:
   * 	This function will be called by upper layer to check for events on the
   * interface in situations where interrupts are disabled. It is used for
   * specific in-kernel networking tasks, such as remote consoles and kernel
   * debugging over the network (example netdump in RedHat).
   */
  static void s2io_netpoll(struct net_device *dev)
  {
  	struct s2io_nic *nic = netdev_priv(dev);
  	const int irq = nic->pdev->irq;
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	u64 val64 = 0xFFFFFFFFFFFFFFFFULL;
  	int i;
  	struct config_param *config = &nic->config;
  	struct mac_info *mac_control = &nic->mac_control;
  
  	if (pci_channel_offline(nic->pdev))
  		return;
  
  	disable_irq(irq);
  
  	writeq(val64, &bar0->rx_traffic_int);
  	writeq(val64, &bar0->tx_traffic_int);
  
  	/* we need to free up the transmitted skbufs or else netpoll will
  	 * run out of skbs and will fail and eventually netpoll application such
  	 * as netdump will fail.
  	 */
  	for (i = 0; i < config->tx_fifo_num; i++)
  		tx_intr_handler(&mac_control->fifos[i]);
  
  	/* check for received packet and indicate up to network */
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct ring_info *ring = &mac_control->rings[i];
  
  		rx_intr_handler(ring, 0);
  	}
  
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct ring_info *ring = &mac_control->rings[i];
  
  		if (fill_rx_buffers(nic, ring, 0) == -ENOMEM) {
  			DBG_PRINT(INFO_DBG,
  				  "%s: Out of memory in Rx Netpoll!!\n",
  				  dev->name);
  			break;
  		}
  	}
  	enable_irq(irq);
  }
  #endif
  
  /**
   *  rx_intr_handler - Rx interrupt handler
   *  @ring_data: per ring structure.
   *  @budget: budget for napi processing.
   *  Description:
   *  If the interrupt is because of a received frame or if the
   *  receive ring contains fresh as yet un-processed frames,this function is
   *  called. It picks out the RxD at which place the last Rx processing had
   *  stopped and sends the skb to the OSM's Rx handler and then increments
   *  the offset.
   *  Return Value:
   *  No. of napi packets processed.
   */
  static int rx_intr_handler(struct ring_info *ring_data, int budget)
  {
  	int get_block, put_block;
  	struct rx_curr_get_info get_info, put_info;
  	struct RxD_t *rxdp;
  	struct sk_buff *skb;
  	int pkt_cnt = 0, napi_pkts = 0;
  	int i;
  	struct RxD1 *rxdp1;
  	struct RxD3 *rxdp3;
  
  	if (budget <= 0)
  		return napi_pkts;
  
  	get_info = ring_data->rx_curr_get_info;
  	get_block = get_info.block_index;
  	memcpy(&put_info, &ring_data->rx_curr_put_info, sizeof(put_info));
  	put_block = put_info.block_index;
  	rxdp = ring_data->rx_blocks[get_block].rxds[get_info.offset].virt_addr;
  
  	while (RXD_IS_UP2DT(rxdp)) {
  		/*
  		 * If your are next to put index then it's
  		 * FIFO full condition
  		 */
  		if ((get_block == put_block) &&
  		    (get_info.offset + 1) == put_info.offset) {
  			DBG_PRINT(INTR_DBG, "%s: Ring Full\n",
  				  ring_data->dev->name);
  			break;
  		}
  		skb = (struct sk_buff *)((unsigned long)rxdp->Host_Control);
  		if (skb == NULL) {
  			DBG_PRINT(ERR_DBG, "%s: NULL skb in Rx Intr\n",
  				  ring_data->dev->name);
  			return 0;
  		}
  		if (ring_data->rxd_mode == RXD_MODE_1) {
  			rxdp1 = (struct RxD1 *)rxdp;
  			dma_unmap_single(&ring_data->pdev->dev,
  					 (dma_addr_t)rxdp1->Buffer0_ptr,
  					 ring_data->mtu +
  					 HEADER_ETHERNET_II_802_3_SIZE +
  					 HEADER_802_2_SIZE +
  					 HEADER_SNAP_SIZE,
  					 DMA_FROM_DEVICE);
  		} else if (ring_data->rxd_mode == RXD_MODE_3B) {
  			rxdp3 = (struct RxD3 *)rxdp;
  			dma_sync_single_for_cpu(&ring_data->pdev->dev,
  						(dma_addr_t)rxdp3->Buffer0_ptr,
  						BUF0_LEN, DMA_FROM_DEVICE);
  			dma_unmap_single(&ring_data->pdev->dev,
  					 (dma_addr_t)rxdp3->Buffer2_ptr,
  					 ring_data->mtu + 4, DMA_FROM_DEVICE);
  		}
  		prefetch(skb->data);
  		rx_osm_handler(ring_data, rxdp);
  		get_info.offset++;
  		ring_data->rx_curr_get_info.offset = get_info.offset;
  		rxdp = ring_data->rx_blocks[get_block].
  			rxds[get_info.offset].virt_addr;
  		if (get_info.offset == rxd_count[ring_data->rxd_mode]) {
  			get_info.offset = 0;
  			ring_data->rx_curr_get_info.offset = get_info.offset;
  			get_block++;
  			if (get_block == ring_data->block_count)
  				get_block = 0;
  			ring_data->rx_curr_get_info.block_index = get_block;
  			rxdp = ring_data->rx_blocks[get_block].block_virt_addr;
  		}
  
  		if (ring_data->nic->config.napi) {
  			budget--;
  			napi_pkts++;
  			if (!budget)
  				break;
  		}
  		pkt_cnt++;
  		if ((indicate_max_pkts) && (pkt_cnt > indicate_max_pkts))
  			break;
  	}
  	if (ring_data->lro) {
  		/* Clear all LRO sessions before exiting */
  		for (i = 0; i < MAX_LRO_SESSIONS; i++) {
  			struct lro *lro = &ring_data->lro0_n[i];
  			if (lro->in_use) {
  				update_L3L4_header(ring_data->nic, lro);
  				queue_rx_frame(lro->parent, lro->vlan_tag);
  				clear_lro_session(lro);
  			}
  		}
  	}
  	return napi_pkts;
  }
  
  /**
   *  tx_intr_handler - Transmit interrupt handler
   *  @fifo_data : fifo data pointer
   *  Description:
   *  If an interrupt was raised to indicate DMA complete of the
   *  Tx packet, this function is called. It identifies the last TxD
   *  whose buffer was freed and frees all skbs whose data have already
   *  DMA'ed into the NICs internal memory.
   *  Return Value:
   *  NONE
   */
  
  static void tx_intr_handler(struct fifo_info *fifo_data)
  {
  	struct s2io_nic *nic = fifo_data->nic;
  	struct tx_curr_get_info get_info, put_info;
  	struct sk_buff *skb = NULL;
  	struct TxD *txdlp;
  	int pkt_cnt = 0;
  	unsigned long flags = 0;
  	u8 err_mask;
  	struct stat_block *stats = nic->mac_control.stats_info;
  	struct swStat *swstats = &stats->sw_stat;
  
  	if (!spin_trylock_irqsave(&fifo_data->tx_lock, flags))
  		return;
  
  	get_info = fifo_data->tx_curr_get_info;
  	memcpy(&put_info, &fifo_data->tx_curr_put_info, sizeof(put_info));
  	txdlp = fifo_data->list_info[get_info.offset].list_virt_addr;
  	while ((!(txdlp->Control_1 & TXD_LIST_OWN_XENA)) &&
  	       (get_info.offset != put_info.offset) &&
  	       (txdlp->Host_Control)) {
  		/* Check for TxD errors */
  		if (txdlp->Control_1 & TXD_T_CODE) {
  			unsigned long long err;
  			err = txdlp->Control_1 & TXD_T_CODE;
  			if (err & 0x1) {
  				swstats->parity_err_cnt++;
  			}
  
  			/* update t_code statistics */
  			err_mask = err >> 48;
  			switch (err_mask) {
  			case 2:
  				swstats->tx_buf_abort_cnt++;
  				break;
  
  			case 3:
  				swstats->tx_desc_abort_cnt++;
  				break;
  
  			case 7:
  				swstats->tx_parity_err_cnt++;
  				break;
  
  			case 10:
  				swstats->tx_link_loss_cnt++;
  				break;
  
  			case 15:
  				swstats->tx_list_proc_err_cnt++;
  				break;
  			}
  		}
  
  		skb = s2io_txdl_getskb(fifo_data, txdlp, get_info.offset);
  		if (skb == NULL) {
  			spin_unlock_irqrestore(&fifo_data->tx_lock, flags);
  			DBG_PRINT(ERR_DBG, "%s: NULL skb in Tx Free Intr\n",
  				  __func__);
  			return;
  		}
  		pkt_cnt++;
  
  		/* Updating the statistics block */
  		swstats->mem_freed += skb->truesize;
  		dev_consume_skb_irq(skb);
  
  		get_info.offset++;
  		if (get_info.offset == get_info.fifo_len + 1)
  			get_info.offset = 0;
  		txdlp = fifo_data->list_info[get_info.offset].list_virt_addr;
  		fifo_data->tx_curr_get_info.offset = get_info.offset;
  	}
  
  	s2io_wake_tx_queue(fifo_data, pkt_cnt, nic->config.multiq);
  
  	spin_unlock_irqrestore(&fifo_data->tx_lock, flags);
  }
  
  /**
   *  s2io_mdio_write - Function to write in to MDIO registers
   *  @mmd_type : MMD type value (PMA/PMD/WIS/PCS/PHYXS)
   *  @addr     : address value
   *  @value    : data value
   *  @dev      : pointer to net_device structure
   *  Description:
   *  This function is used to write values to the MDIO registers
   *  NONE
   */
  static void s2io_mdio_write(u32 mmd_type, u64 addr, u16 value,
  			    struct net_device *dev)
  {
  	u64 val64;
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  
  	/* address transaction */
  	val64 = MDIO_MMD_INDX_ADDR(addr) |
  		MDIO_MMD_DEV_ADDR(mmd_type) |
  		MDIO_MMS_PRT_ADDR(0x0);
  	writeq(val64, &bar0->mdio_control);
  	val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
  	writeq(val64, &bar0->mdio_control);
  	udelay(100);
  
  	/* Data transaction */
  	val64 = MDIO_MMD_INDX_ADDR(addr) |
  		MDIO_MMD_DEV_ADDR(mmd_type) |
  		MDIO_MMS_PRT_ADDR(0x0) |
  		MDIO_MDIO_DATA(value) |
  		MDIO_OP(MDIO_OP_WRITE_TRANS);
  	writeq(val64, &bar0->mdio_control);
  	val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
  	writeq(val64, &bar0->mdio_control);
  	udelay(100);
  
  	val64 = MDIO_MMD_INDX_ADDR(addr) |
  		MDIO_MMD_DEV_ADDR(mmd_type) |
  		MDIO_MMS_PRT_ADDR(0x0) |
  		MDIO_OP(MDIO_OP_READ_TRANS);
  	writeq(val64, &bar0->mdio_control);
  	val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
  	writeq(val64, &bar0->mdio_control);
  	udelay(100);
  }
  
  /**
   *  s2io_mdio_read - Function to write in to MDIO registers
   *  @mmd_type : MMD type value (PMA/PMD/WIS/PCS/PHYXS)
   *  @addr     : address value
   *  @dev      : pointer to net_device structure
   *  Description:
   *  This function is used to read values to the MDIO registers
   *  NONE
   */
  static u64 s2io_mdio_read(u32 mmd_type, u64 addr, struct net_device *dev)
  {
  	u64 val64 = 0x0;
  	u64 rval64 = 0x0;
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  
  	/* address transaction */
  	val64 = val64 | (MDIO_MMD_INDX_ADDR(addr)
  			 | MDIO_MMD_DEV_ADDR(mmd_type)
  			 | MDIO_MMS_PRT_ADDR(0x0));
  	writeq(val64, &bar0->mdio_control);
  	val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
  	writeq(val64, &bar0->mdio_control);
  	udelay(100);
  
  	/* Data transaction */
  	val64 = MDIO_MMD_INDX_ADDR(addr) |
  		MDIO_MMD_DEV_ADDR(mmd_type) |
  		MDIO_MMS_PRT_ADDR(0x0) |
  		MDIO_OP(MDIO_OP_READ_TRANS);
  	writeq(val64, &bar0->mdio_control);
  	val64 = val64 | MDIO_CTRL_START_TRANS(0xE);
  	writeq(val64, &bar0->mdio_control);
  	udelay(100);
  
  	/* Read the value from regs */
  	rval64 = readq(&bar0->mdio_control);
  	rval64 = rval64 & 0xFFFF0000;
  	rval64 = rval64 >> 16;
  	return rval64;
  }
  
  /**
   *  s2io_chk_xpak_counter - Function to check the status of the xpak counters
   *  @counter      : counter value to be updated
   *  @regs_stat    : registers status
   *  @index        : index
   *  @flag         : flag to indicate the status
   *  @type         : counter type
   *  Description:
   *  This function is to check the status of the xpak counters value
   *  NONE
   */
  
  static void s2io_chk_xpak_counter(u64 *counter, u64 * regs_stat, u32 index,
  				  u16 flag, u16 type)
  {
  	u64 mask = 0x3;
  	u64 val64;
  	int i;
  	for (i = 0; i < index; i++)
  		mask = mask << 0x2;
  
  	if (flag > 0) {
  		*counter = *counter + 1;
  		val64 = *regs_stat & mask;
  		val64 = val64 >> (index * 0x2);
  		val64 = val64 + 1;
  		if (val64 == 3) {
  			switch (type) {
  			case 1:
  				DBG_PRINT(ERR_DBG,
  					  "Take Xframe NIC out of service.\n");
  				DBG_PRINT(ERR_DBG,
  "Excessive temperatures may result in premature transceiver failure.\n");
  				break;
  			case 2:
  				DBG_PRINT(ERR_DBG,
  					  "Take Xframe NIC out of service.\n");
  				DBG_PRINT(ERR_DBG,
  "Excessive bias currents may indicate imminent laser diode failure.\n");
  				break;
  			case 3:
  				DBG_PRINT(ERR_DBG,
  					  "Take Xframe NIC out of service.\n");
  				DBG_PRINT(ERR_DBG,
  "Excessive laser output power may saturate far-end receiver.\n");
  				break;
  			default:
  				DBG_PRINT(ERR_DBG,
  					  "Incorrect XPAK Alarm type\n");
  			}
  			val64 = 0x0;
  		}
  		val64 = val64 << (index * 0x2);
  		*regs_stat = (*regs_stat & (~mask)) | (val64);
  
  	} else {
  		*regs_stat = *regs_stat & (~mask);
  	}
  }
  
  /**
   *  s2io_updt_xpak_counter - Function to update the xpak counters
   *  @dev         : pointer to net_device struct
   *  Description:
   *  This function is to upate the status of the xpak counters value
   *  NONE
   */
  static void s2io_updt_xpak_counter(struct net_device *dev)
  {
  	u16 flag  = 0x0;
  	u16 type  = 0x0;
  	u16 val16 = 0x0;
  	u64 val64 = 0x0;
  	u64 addr  = 0x0;
  
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct stat_block *stats = sp->mac_control.stats_info;
  	struct xpakStat *xstats = &stats->xpak_stat;
  
  	/* Check the communication with the MDIO slave */
  	addr = MDIO_CTRL1;
  	val64 = 0x0;
  	val64 = s2io_mdio_read(MDIO_MMD_PMAPMD, addr, dev);
  	if ((val64 == 0xFFFF) || (val64 == 0x0000)) {
  		DBG_PRINT(ERR_DBG,
  			  "ERR: MDIO slave access failed - Returned %llx\n",
  			  (unsigned long long)val64);
  		return;
  	}
  
  	/* Check for the expected value of control reg 1 */
  	if (val64 != MDIO_CTRL1_SPEED10G) {
  		DBG_PRINT(ERR_DBG, "Incorrect value at PMA address 0x0000 - "
  			  "Returned: %llx- Expected: 0x%x\n",
  			  (unsigned long long)val64, MDIO_CTRL1_SPEED10G);
  		return;
  	}
  
  	/* Loading the DOM register to MDIO register */
  	addr = 0xA100;
  	s2io_mdio_write(MDIO_MMD_PMAPMD, addr, val16, dev);
  	val64 = s2io_mdio_read(MDIO_MMD_PMAPMD, addr, dev);
  
  	/* Reading the Alarm flags */
  	addr = 0xA070;
  	val64 = 0x0;
  	val64 = s2io_mdio_read(MDIO_MMD_PMAPMD, addr, dev);
  
  	flag = CHECKBIT(val64, 0x7);
  	type = 1;
  	s2io_chk_xpak_counter(&xstats->alarm_transceiver_temp_high,
  			      &xstats->xpak_regs_stat,
  			      0x0, flag, type);
  
  	if (CHECKBIT(val64, 0x6))
  		xstats->alarm_transceiver_temp_low++;
  
  	flag = CHECKBIT(val64, 0x3);
  	type = 2;
  	s2io_chk_xpak_counter(&xstats->alarm_laser_bias_current_high,
  			      &xstats->xpak_regs_stat,
  			      0x2, flag, type);
  
  	if (CHECKBIT(val64, 0x2))
  		xstats->alarm_laser_bias_current_low++;
  
  	flag = CHECKBIT(val64, 0x1);
  	type = 3;
  	s2io_chk_xpak_counter(&xstats->alarm_laser_output_power_high,
  			      &xstats->xpak_regs_stat,
  			      0x4, flag, type);
  
  	if (CHECKBIT(val64, 0x0))
  		xstats->alarm_laser_output_power_low++;
  
  	/* Reading the Warning flags */
  	addr = 0xA074;
  	val64 = 0x0;
  	val64 = s2io_mdio_read(MDIO_MMD_PMAPMD, addr, dev);
  
  	if (CHECKBIT(val64, 0x7))
  		xstats->warn_transceiver_temp_high++;
  
  	if (CHECKBIT(val64, 0x6))
  		xstats->warn_transceiver_temp_low++;
  
  	if (CHECKBIT(val64, 0x3))
  		xstats->warn_laser_bias_current_high++;
  
  	if (CHECKBIT(val64, 0x2))
  		xstats->warn_laser_bias_current_low++;
  
  	if (CHECKBIT(val64, 0x1))
  		xstats->warn_laser_output_power_high++;
  
  	if (CHECKBIT(val64, 0x0))
  		xstats->warn_laser_output_power_low++;
  }
  
  /**
   *  wait_for_cmd_complete - waits for a command to complete.
   *  @addr: address
   *  @busy_bit: bit to check for busy
   *  @bit_state: state to check
   *  @may_sleep: parameter indicates if sleeping when waiting for
   *  command complete
   *  Description: Function that waits for a command to Write into RMAC
   *  ADDR DATA registers to be completed and returns either success or
   *  error depending on whether the command was complete or not.
   *  Return value:
   *   SUCCESS on success and FAILURE on failure.
   */
  
  static int wait_for_cmd_complete(void __iomem *addr, u64 busy_bit,
  				 int bit_state, bool may_sleep)
  {
  	int ret = FAILURE, cnt = 0, delay = 1;
  	u64 val64;
  
  	if ((bit_state != S2IO_BIT_RESET) && (bit_state != S2IO_BIT_SET))
  		return FAILURE;
  
  	do {
  		val64 = readq(addr);
  		if (bit_state == S2IO_BIT_RESET) {
  			if (!(val64 & busy_bit)) {
  				ret = SUCCESS;
  				break;
  			}
  		} else {
  			if (val64 & busy_bit) {
  				ret = SUCCESS;
  				break;
  			}
  		}
  
  		if (!may_sleep)
  			mdelay(delay);
  		else
  			msleep(delay);
  
  		if (++cnt >= 10)
  			delay = 50;
  	} while (cnt < 20);
  	return ret;
  }
  /**
   * check_pci_device_id - Checks if the device id is supported
   * @id : device id
   * Description: Function to check if the pci device id is supported by driver.
   * Return value: Actual device id if supported else PCI_ANY_ID
   */
  static u16 check_pci_device_id(u16 id)
  {
  	switch (id) {
  	case PCI_DEVICE_ID_HERC_WIN:
  	case PCI_DEVICE_ID_HERC_UNI:
  		return XFRAME_II_DEVICE;
  	case PCI_DEVICE_ID_S2IO_UNI:
  	case PCI_DEVICE_ID_S2IO_WIN:
  		return XFRAME_I_DEVICE;
  	default:
  		return PCI_ANY_ID;
  	}
  }
  
  /**
   *  s2io_reset - Resets the card.
   *  @sp : private member of the device structure.
   *  Description: Function to Reset the card. This function then also
   *  restores the previously saved PCI configuration space registers as
   *  the card reset also resets the configuration space.
   *  Return value:
   *  void.
   */
  
  static void s2io_reset(struct s2io_nic *sp)
  {
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u64 val64;
  	u16 subid, pci_cmd;
  	int i;
  	u16 val16;
  	unsigned long long up_cnt, down_cnt, up_time, down_time, reset_cnt;
  	unsigned long long mem_alloc_cnt, mem_free_cnt, watchdog_cnt;
  	struct stat_block *stats;
  	struct swStat *swstats;
  
  	DBG_PRINT(INIT_DBG, "%s: Resetting XFrame card %s\n",
  		  __func__, pci_name(sp->pdev));
  
  	/* Back up  the PCI-X CMD reg, dont want to lose MMRBC, OST settings */
  	pci_read_config_word(sp->pdev, PCIX_COMMAND_REGISTER, &(pci_cmd));
  
  	val64 = SW_RESET_ALL;
  	writeq(val64, &bar0->sw_reset);
  	if (strstr(sp->product_name, "CX4"))
  		msleep(750);
  	msleep(250);
  	for (i = 0; i < S2IO_MAX_PCI_CONFIG_SPACE_REINIT; i++) {
  
  		/* Restore the PCI state saved during initialization. */
  		pci_restore_state(sp->pdev);
  		pci_save_state(sp->pdev);
  		pci_read_config_word(sp->pdev, 0x2, &val16);
  		if (check_pci_device_id(val16) != (u16)PCI_ANY_ID)
  			break;
  		msleep(200);
  	}
  
  	if (check_pci_device_id(val16) == (u16)PCI_ANY_ID)
  		DBG_PRINT(ERR_DBG, "%s SW_Reset failed!\n", __func__);
  
  	pci_write_config_word(sp->pdev, PCIX_COMMAND_REGISTER, pci_cmd);
  
  	s2io_init_pci(sp);
  
  	/* Set swapper to enable I/O register access */
  	s2io_set_swapper(sp);
  
  	/* restore mac_addr entries */
  	do_s2io_restore_unicast_mc(sp);
  
  	/* Restore the MSIX table entries from local variables */
  	restore_xmsi_data(sp);
  
  	/* Clear certain PCI/PCI-X fields after reset */
  	if (sp->device_type == XFRAME_II_DEVICE) {
  		/* Clear "detected parity error" bit */
  		pci_write_config_word(sp->pdev, PCI_STATUS, 0x8000);
  
  		/* Clearing PCIX Ecc status register */
  		pci_write_config_dword(sp->pdev, 0x68, 0x7C);
  
  		/* Clearing PCI_STATUS error reflected here */
  		writeq(s2BIT(62), &bar0->txpic_int_reg);
  	}
  
  	/* Reset device statistics maintained by OS */
  	memset(&sp->stats, 0, sizeof(struct net_device_stats));
  
  	stats = sp->mac_control.stats_info;
  	swstats = &stats->sw_stat;
  
  	/* save link up/down time/cnt, reset/memory/watchdog cnt */
  	up_cnt = swstats->link_up_cnt;
  	down_cnt = swstats->link_down_cnt;
  	up_time = swstats->link_up_time;
  	down_time = swstats->link_down_time;
  	reset_cnt = swstats->soft_reset_cnt;
  	mem_alloc_cnt = swstats->mem_allocated;
  	mem_free_cnt = swstats->mem_freed;
  	watchdog_cnt = swstats->watchdog_timer_cnt;
  
  	memset(stats, 0, sizeof(struct stat_block));
  
  	/* restore link up/down time/cnt, reset/memory/watchdog cnt */
  	swstats->link_up_cnt = up_cnt;
  	swstats->link_down_cnt = down_cnt;
  	swstats->link_up_time = up_time;
  	swstats->link_down_time = down_time;
  	swstats->soft_reset_cnt = reset_cnt;
  	swstats->mem_allocated = mem_alloc_cnt;
  	swstats->mem_freed = mem_free_cnt;
  	swstats->watchdog_timer_cnt = watchdog_cnt;
  
  	/* SXE-002: Configure link and activity LED to turn it off */
  	subid = sp->pdev->subsystem_device;
  	if (((subid & 0xFF) >= 0x07) &&
  	    (sp->device_type == XFRAME_I_DEVICE)) {
  		val64 = readq(&bar0->gpio_control);
  		val64 |= 0x0000800000000000ULL;
  		writeq(val64, &bar0->gpio_control);
  		val64 = 0x0411040400000000ULL;
  		writeq(val64, (void __iomem *)bar0 + 0x2700);
  	}
  
  	/*
  	 * Clear spurious ECC interrupts that would have occurred on
  	 * XFRAME II cards after reset.
  	 */
  	if (sp->device_type == XFRAME_II_DEVICE) {
  		val64 = readq(&bar0->pcc_err_reg);
  		writeq(val64, &bar0->pcc_err_reg);
  	}
  
  	sp->device_enabled_once = false;
  }
  
  /**
   *  s2io_set_swapper - to set the swapper controle on the card
   *  @sp : private member of the device structure,
   *  pointer to the s2io_nic structure.
   *  Description: Function to set the swapper control on the card
   *  correctly depending on the 'endianness' of the system.
   *  Return value:
   *  SUCCESS on success and FAILURE on failure.
   */
  
  static int s2io_set_swapper(struct s2io_nic *sp)
  {
  	struct net_device *dev = sp->dev;
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u64 val64, valt, valr;
  
  	/*
  	 * Set proper endian settings and verify the same by reading
  	 * the PIF Feed-back register.
  	 */
  
  	val64 = readq(&bar0->pif_rd_swapper_fb);
  	if (val64 != 0x0123456789ABCDEFULL) {
  		int i = 0;
  		static const u64 value[] = {
  			0xC30000C3C30000C3ULL,	/* FE=1, SE=1 */
  			0x8100008181000081ULL,	/* FE=1, SE=0 */
  			0x4200004242000042ULL,	/* FE=0, SE=1 */
  			0			/* FE=0, SE=0 */
  		};
  
  		while (i < 4) {
  			writeq(value[i], &bar0->swapper_ctrl);
  			val64 = readq(&bar0->pif_rd_swapper_fb);
  			if (val64 == 0x0123456789ABCDEFULL)
  				break;
  			i++;
  		}
  		if (i == 4) {
  			DBG_PRINT(ERR_DBG, "%s: Endian settings are wrong, "
  				  "feedback read %llx\n",
  				  dev->name, (unsigned long long)val64);
  			return FAILURE;
  		}
  		valr = value[i];
  	} else {
  		valr = readq(&bar0->swapper_ctrl);
  	}
  
  	valt = 0x0123456789ABCDEFULL;
  	writeq(valt, &bar0->xmsi_address);
  	val64 = readq(&bar0->xmsi_address);
  
  	if (val64 != valt) {
  		int i = 0;
  		static const u64 value[] = {
  			0x00C3C30000C3C300ULL,	/* FE=1, SE=1 */
  			0x0081810000818100ULL,	/* FE=1, SE=0 */
  			0x0042420000424200ULL,	/* FE=0, SE=1 */
  			0			/* FE=0, SE=0 */
  		};
  
  		while (i < 4) {
  			writeq((value[i] | valr), &bar0->swapper_ctrl);
  			writeq(valt, &bar0->xmsi_address);
  			val64 = readq(&bar0->xmsi_address);
  			if (val64 == valt)
  				break;
  			i++;
  		}
  		if (i == 4) {
  			unsigned long long x = val64;
  			DBG_PRINT(ERR_DBG,
  				  "Write failed, Xmsi_addr reads:0x%llx\n", x);
  			return FAILURE;
  		}
  	}
  	val64 = readq(&bar0->swapper_ctrl);
  	val64 &= 0xFFFF000000000000ULL;
  
  #ifdef __BIG_ENDIAN
  	/*
  	 * The device by default set to a big endian format, so a
  	 * big endian driver need not set anything.
  	 */
  	val64 |= (SWAPPER_CTRL_TXP_FE |
  		  SWAPPER_CTRL_TXP_SE |
  		  SWAPPER_CTRL_TXD_R_FE |
  		  SWAPPER_CTRL_TXD_W_FE |
  		  SWAPPER_CTRL_TXF_R_FE |
  		  SWAPPER_CTRL_RXD_R_FE |
  		  SWAPPER_CTRL_RXD_W_FE |
  		  SWAPPER_CTRL_RXF_W_FE |
  		  SWAPPER_CTRL_XMSI_FE |
  		  SWAPPER_CTRL_STATS_FE |
  		  SWAPPER_CTRL_STATS_SE);
  	if (sp->config.intr_type == INTA)
  		val64 |= SWAPPER_CTRL_XMSI_SE;
  	writeq(val64, &bar0->swapper_ctrl);
  #else
  	/*
  	 * Initially we enable all bits to make it accessible by the
  	 * driver, then we selectively enable only those bits that
  	 * we want to set.
  	 */
  	val64 |= (SWAPPER_CTRL_TXP_FE |
  		  SWAPPER_CTRL_TXP_SE |
  		  SWAPPER_CTRL_TXD_R_FE |
  		  SWAPPER_CTRL_TXD_R_SE |
  		  SWAPPER_CTRL_TXD_W_FE |
  		  SWAPPER_CTRL_TXD_W_SE |
  		  SWAPPER_CTRL_TXF_R_FE |
  		  SWAPPER_CTRL_RXD_R_FE |
  		  SWAPPER_CTRL_RXD_R_SE |
  		  SWAPPER_CTRL_RXD_W_FE |
  		  SWAPPER_CTRL_RXD_W_SE |
  		  SWAPPER_CTRL_RXF_W_FE |
  		  SWAPPER_CTRL_XMSI_FE |
  		  SWAPPER_CTRL_STATS_FE |
  		  SWAPPER_CTRL_STATS_SE);
  	if (sp->config.intr_type == INTA)
  		val64 |= SWAPPER_CTRL_XMSI_SE;
  	writeq(val64, &bar0->swapper_ctrl);
  #endif
  	val64 = readq(&bar0->swapper_ctrl);
  
  	/*
  	 * Verifying if endian settings are accurate by reading a
  	 * feedback register.
  	 */
  	val64 = readq(&bar0->pif_rd_swapper_fb);
  	if (val64 != 0x0123456789ABCDEFULL) {
  		/* Endian settings are incorrect, calls for another dekko. */
  		DBG_PRINT(ERR_DBG,
  			  "%s: Endian settings are wrong, feedback read %llx\n",
  			  dev->name, (unsigned long long)val64);
  		return FAILURE;
  	}
  
  	return SUCCESS;
  }
  
  static int wait_for_msix_trans(struct s2io_nic *nic, int i)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	u64 val64;
  	int ret = 0, cnt = 0;
  
  	do {
  		val64 = readq(&bar0->xmsi_access);
  		if (!(val64 & s2BIT(15)))
  			break;
  		mdelay(1);
  		cnt++;
  	} while (cnt < 5);
  	if (cnt == 5) {
  		DBG_PRINT(ERR_DBG, "XMSI # %d Access failed\n", i);
  		ret = 1;
  	}
  
  	return ret;
  }
  
  static void restore_xmsi_data(struct s2io_nic *nic)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	u64 val64;
  	int i, msix_index;
  
  	if (nic->device_type == XFRAME_I_DEVICE)
  		return;
  
  	for (i = 0; i < MAX_REQUESTED_MSI_X; i++) {
  		msix_index = (i) ? ((i-1) * 8 + 1) : 0;
  		writeq(nic->msix_info[i].addr, &bar0->xmsi_address);
  		writeq(nic->msix_info[i].data, &bar0->xmsi_data);
  		val64 = (s2BIT(7) | s2BIT(15) | vBIT(msix_index, 26, 6));
  		writeq(val64, &bar0->xmsi_access);
  		if (wait_for_msix_trans(nic, msix_index))
  			DBG_PRINT(ERR_DBG, "%s: index: %d failed\n",
  				  __func__, msix_index);
  	}
  }
  
  static void store_xmsi_data(struct s2io_nic *nic)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	u64 val64, addr, data;
  	int i, msix_index;
  
  	if (nic->device_type == XFRAME_I_DEVICE)
  		return;
  
  	/* Store and display */
  	for (i = 0; i < MAX_REQUESTED_MSI_X; i++) {
  		msix_index = (i) ? ((i-1) * 8 + 1) : 0;
  		val64 = (s2BIT(15) | vBIT(msix_index, 26, 6));
  		writeq(val64, &bar0->xmsi_access);
  		if (wait_for_msix_trans(nic, msix_index)) {
  			DBG_PRINT(ERR_DBG, "%s: index: %d failed\n",
  				  __func__, msix_index);
  			continue;
  		}
  		addr = readq(&bar0->xmsi_address);
  		data = readq(&bar0->xmsi_data);
  		if (addr && data) {
  			nic->msix_info[i].addr = addr;
  			nic->msix_info[i].data = data;
  		}
  	}
  }
  
  static int s2io_enable_msi_x(struct s2io_nic *nic)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	u64 rx_mat;
  	u16 msi_control; /* Temp variable */
  	int ret, i, j, msix_indx = 1;
  	int size;
  	struct stat_block *stats = nic->mac_control.stats_info;
  	struct swStat *swstats = &stats->sw_stat;
  
  	size = nic->num_entries * sizeof(struct msix_entry);
  	nic->entries = kzalloc(size, GFP_KERNEL);
  	if (!nic->entries) {
  		DBG_PRINT(INFO_DBG, "%s: Memory allocation failed\n",
  			  __func__);
  		swstats->mem_alloc_fail_cnt++;
  		return -ENOMEM;
  	}
  	swstats->mem_allocated += size;
  
  	size = nic->num_entries * sizeof(struct s2io_msix_entry);
  	nic->s2io_entries = kzalloc(size, GFP_KERNEL);
  	if (!nic->s2io_entries) {
  		DBG_PRINT(INFO_DBG, "%s: Memory allocation failed\n",
  			  __func__);
  		swstats->mem_alloc_fail_cnt++;
  		kfree(nic->entries);
  		swstats->mem_freed
  			+= (nic->num_entries * sizeof(struct msix_entry));
  		return -ENOMEM;
  	}
  	swstats->mem_allocated += size;
  
  	nic->entries[0].entry = 0;
  	nic->s2io_entries[0].entry = 0;
  	nic->s2io_entries[0].in_use = MSIX_FLG;
  	nic->s2io_entries[0].type = MSIX_ALARM_TYPE;
  	nic->s2io_entries[0].arg = &nic->mac_control.fifos;
  
  	for (i = 1; i < nic->num_entries; i++) {
  		nic->entries[i].entry = ((i - 1) * 8) + 1;
  		nic->s2io_entries[i].entry = ((i - 1) * 8) + 1;
  		nic->s2io_entries[i].arg = NULL;
  		nic->s2io_entries[i].in_use = 0;
  	}
  
  	rx_mat = readq(&bar0->rx_mat);
  	for (j = 0; j < nic->config.rx_ring_num; j++) {
  		rx_mat |= RX_MAT_SET(j, msix_indx);
  		nic->s2io_entries[j+1].arg = &nic->mac_control.rings[j];
  		nic->s2io_entries[j+1].type = MSIX_RING_TYPE;
  		nic->s2io_entries[j+1].in_use = MSIX_FLG;
  		msix_indx += 8;
  	}
  	writeq(rx_mat, &bar0->rx_mat);
  	readq(&bar0->rx_mat);
  
  	ret = pci_enable_msix_range(nic->pdev, nic->entries,
  				    nic->num_entries, nic->num_entries);
  	/* We fail init if error or we get less vectors than min required */
  	if (ret < 0) {
  		DBG_PRINT(ERR_DBG, "Enabling MSI-X failed\n");
  		kfree(nic->entries);
  		swstats->mem_freed += nic->num_entries *
  			sizeof(struct msix_entry);
  		kfree(nic->s2io_entries);
  		swstats->mem_freed += nic->num_entries *
  			sizeof(struct s2io_msix_entry);
  		nic->entries = NULL;
  		nic->s2io_entries = NULL;
  		return -ENOMEM;
  	}
  
  	/*
  	 * To enable MSI-X, MSI also needs to be enabled, due to a bug
  	 * in the herc NIC. (Temp change, needs to be removed later)
  	 */
  	pci_read_config_word(nic->pdev, 0x42, &msi_control);
  	msi_control |= 0x1; /* Enable MSI */
  	pci_write_config_word(nic->pdev, 0x42, msi_control);
  
  	return 0;
  }
  
  /* Handle software interrupt used during MSI(X) test */
  static irqreturn_t s2io_test_intr(int irq, void *dev_id)
  {
  	struct s2io_nic *sp = dev_id;
  
  	sp->msi_detected = 1;
  	wake_up(&sp->msi_wait);
  
  	return IRQ_HANDLED;
  }
  
  /* Test interrupt path by forcing a a software IRQ */
  static int s2io_test_msi(struct s2io_nic *sp)
  {
  	struct pci_dev *pdev = sp->pdev;
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	int err;
  	u64 val64, saved64;
  
  	err = request_irq(sp->entries[1].vector, s2io_test_intr, 0,
  			  sp->name, sp);
  	if (err) {
  		DBG_PRINT(ERR_DBG, "%s: PCI %s: cannot assign irq %d\n",
  			  sp->dev->name, pci_name(pdev), pdev->irq);
  		return err;
  	}
  
  	init_waitqueue_head(&sp->msi_wait);
  	sp->msi_detected = 0;
  
  	saved64 = val64 = readq(&bar0->scheduled_int_ctrl);
  	val64 |= SCHED_INT_CTRL_ONE_SHOT;
  	val64 |= SCHED_INT_CTRL_TIMER_EN;
  	val64 |= SCHED_INT_CTRL_INT2MSI(1);
  	writeq(val64, &bar0->scheduled_int_ctrl);
  
  	wait_event_timeout(sp->msi_wait, sp->msi_detected, HZ/10);
  
  	if (!sp->msi_detected) {
  		/* MSI(X) test failed, go back to INTx mode */
  		DBG_PRINT(ERR_DBG, "%s: PCI %s: No interrupt was generated "
  			  "using MSI(X) during test\n",
  			  sp->dev->name, pci_name(pdev));
  
  		err = -EOPNOTSUPP;
  	}
  
  	free_irq(sp->entries[1].vector, sp);
  
  	writeq(saved64, &bar0->scheduled_int_ctrl);
  
  	return err;
  }
  
  static void remove_msix_isr(struct s2io_nic *sp)
  {
  	int i;
  	u16 msi_control;
  
  	for (i = 0; i < sp->num_entries; i++) {
  		if (sp->s2io_entries[i].in_use == MSIX_REGISTERED_SUCCESS) {
  			int vector = sp->entries[i].vector;
  			void *arg = sp->s2io_entries[i].arg;
  			free_irq(vector, arg);
  		}
  	}
  
  	kfree(sp->entries);
  	kfree(sp->s2io_entries);
  	sp->entries = NULL;
  	sp->s2io_entries = NULL;
  
  	pci_read_config_word(sp->pdev, 0x42, &msi_control);
  	msi_control &= 0xFFFE; /* Disable MSI */
  	pci_write_config_word(sp->pdev, 0x42, msi_control);
  
  	pci_disable_msix(sp->pdev);
  }
  
  static void remove_inta_isr(struct s2io_nic *sp)
  {
  	free_irq(sp->pdev->irq, sp->dev);
  }
  
  /* ********************************************************* *
   * Functions defined below concern the OS part of the driver *
   * ********************************************************* */
  
  /**
   *  s2io_open - open entry point of the driver
   *  @dev : pointer to the device structure.
   *  Description:
   *  This function is the open entry point of the driver. It mainly calls a
   *  function to allocate Rx buffers and inserts them into the buffer
   *  descriptors and then enables the Rx part of the NIC.
   *  Return value:
   *  0 on success and an appropriate (-)ve integer as defined in errno.h
   *   file on failure.
   */
  
  static int s2io_open(struct net_device *dev)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct swStat *swstats = &sp->mac_control.stats_info->sw_stat;
  	int err = 0;
  
  	/*
  	 * Make sure you have link off by default every time
  	 * Nic is initialized
  	 */
  	netif_carrier_off(dev);
  	sp->last_link_state = 0;
  
  	/* Initialize H/W and enable interrupts */
  	err = s2io_card_up(sp);
  	if (err) {
  		DBG_PRINT(ERR_DBG, "%s: H/W initialization failed\n",
  			  dev->name);
  		goto hw_init_failed;
  	}
  
  	if (do_s2io_prog_unicast(dev, dev->dev_addr) == FAILURE) {
  		DBG_PRINT(ERR_DBG, "Set Mac Address Failed\n");
  		s2io_card_down(sp);
  		err = -ENODEV;
  		goto hw_init_failed;
  	}
  	s2io_start_all_tx_queue(sp);
  	return 0;
  
  hw_init_failed:
  	if (sp->config.intr_type == MSI_X) {
  		if (sp->entries) {
  			kfree(sp->entries);
  			swstats->mem_freed += sp->num_entries *
  				sizeof(struct msix_entry);
  		}
  		if (sp->s2io_entries) {
  			kfree(sp->s2io_entries);
  			swstats->mem_freed += sp->num_entries *
  				sizeof(struct s2io_msix_entry);
  		}
  	}
  	return err;
  }
  
  /**
   *  s2io_close -close entry point of the driver
   *  @dev : device pointer.
   *  Description:
   *  This is the stop entry point of the driver. It needs to undo exactly
   *  whatever was done by the open entry point,thus it's usually referred to
   *  as the close function.Among other things this function mainly stops the
   *  Rx side of the NIC and frees all the Rx buffers in the Rx rings.
   *  Return value:
   *  0 on success and an appropriate (-)ve integer as defined in errno.h
   *  file on failure.
   */
  
  static int s2io_close(struct net_device *dev)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct config_param *config = &sp->config;
  	u64 tmp64;
  	int offset;
  
  	/* Return if the device is already closed               *
  	 *  Can happen when s2io_card_up failed in change_mtu    *
  	 */
  	if (!is_s2io_card_up(sp))
  		return 0;
  
  	s2io_stop_all_tx_queue(sp);
  	/* delete all populated mac entries */
  	for (offset = 1; offset < config->max_mc_addr; offset++) {
  		tmp64 = do_s2io_read_unicast_mc(sp, offset);
  		if (tmp64 != S2IO_DISABLE_MAC_ENTRY)
  			do_s2io_delete_unicast_mc(sp, tmp64);
  	}
  
  	s2io_card_down(sp);
  
  	return 0;
  }
  
  /**
   *  s2io_xmit - Tx entry point of te driver
   *  @skb : the socket buffer containing the Tx data.
   *  @dev : device pointer.
   *  Description :
   *  This function is the Tx entry point of the driver. S2IO NIC supports
   *  certain protocol assist features on Tx side, namely  CSO, S/G, LSO.
   *  NOTE: when device can't queue the pkt,just the trans_start variable will
   *  not be upadted.
   *  Return value:
   *  0 on success & 1 on failure.
   */
  
  static netdev_tx_t s2io_xmit(struct sk_buff *skb, struct net_device *dev)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	u16 frg_cnt, frg_len, i, queue, queue_len, put_off, get_off;
  	register u64 val64;
  	struct TxD *txdp;
  	struct TxFIFO_element __iomem *tx_fifo;
  	unsigned long flags = 0;
  	u16 vlan_tag = 0;
  	struct fifo_info *fifo = NULL;
  	int offload_type;
  	int enable_per_list_interrupt = 0;
  	struct config_param *config = &sp->config;
  	struct mac_info *mac_control = &sp->mac_control;
  	struct stat_block *stats = mac_control->stats_info;
  	struct swStat *swstats = &stats->sw_stat;
  
  	DBG_PRINT(TX_DBG, "%s: In Neterion Tx routine\n", dev->name);
  
  	if (unlikely(skb->len <= 0)) {
  		DBG_PRINT(TX_DBG, "%s: Buffer has no data..\n", dev->name);
  		dev_kfree_skb_any(skb);
  		return NETDEV_TX_OK;
  	}
  
  	if (!is_s2io_card_up(sp)) {
  		DBG_PRINT(TX_DBG, "%s: Card going down for reset\n",
  			  dev->name);
  		dev_kfree_skb_any(skb);
  		return NETDEV_TX_OK;
  	}
  
  	queue = 0;
  	if (skb_vlan_tag_present(skb))
  		vlan_tag = skb_vlan_tag_get(skb);
  	if (sp->config.tx_steering_type == TX_DEFAULT_STEERING) {
  		if (skb->protocol == htons(ETH_P_IP)) {
  			struct iphdr *ip;
  			struct tcphdr *th;
  			ip = ip_hdr(skb);
  
  			if (!ip_is_fragment(ip)) {
  				th = (struct tcphdr *)(((unsigned char *)ip) +
  						       ip->ihl*4);
  
  				if (ip->protocol == IPPROTO_TCP) {
  					queue_len = sp->total_tcp_fifos;
  					queue = (ntohs(th->source) +
  						 ntohs(th->dest)) &
  						sp->fifo_selector[queue_len - 1];
  					if (queue >= queue_len)
  						queue = queue_len - 1;
  				} else if (ip->protocol == IPPROTO_UDP) {
  					queue_len = sp->total_udp_fifos;
  					queue = (ntohs(th->source) +
  						 ntohs(th->dest)) &
  						sp->fifo_selector[queue_len - 1];
  					if (queue >= queue_len)
  						queue = queue_len - 1;
  					queue += sp->udp_fifo_idx;
  					if (skb->len > 1024)
  						enable_per_list_interrupt = 1;
  				}
  			}
  		}
  	} else if (sp->config.tx_steering_type == TX_PRIORITY_STEERING)
  		/* get fifo number based on skb->priority value */
  		queue = config->fifo_mapping
  			[skb->priority & (MAX_TX_FIFOS - 1)];
  	fifo = &mac_control->fifos[queue];
  
  	spin_lock_irqsave(&fifo->tx_lock, flags);
  
  	if (sp->config.multiq) {
  		if (__netif_subqueue_stopped(dev, fifo->fifo_no)) {
  			spin_unlock_irqrestore(&fifo->tx_lock, flags);
  			return NETDEV_TX_BUSY;
  		}
  	} else if (unlikely(fifo->queue_state == FIFO_QUEUE_STOP)) {
  		if (netif_queue_stopped(dev)) {
  			spin_unlock_irqrestore(&fifo->tx_lock, flags);
  			return NETDEV_TX_BUSY;
  		}
  	}
  
  	put_off = (u16)fifo->tx_curr_put_info.offset;
  	get_off = (u16)fifo->tx_curr_get_info.offset;
  	txdp = fifo->list_info[put_off].list_virt_addr;
  
  	queue_len = fifo->tx_curr_put_info.fifo_len + 1;
  	/* Avoid "put" pointer going beyond "get" pointer */
  	if (txdp->Host_Control ||
  	    ((put_off+1) == queue_len ? 0 : (put_off+1)) == get_off) {
  		DBG_PRINT(TX_DBG, "Error in xmit, No free TXDs.\n");
  		s2io_stop_tx_queue(sp, fifo->fifo_no);
  		dev_kfree_skb_any(skb);
  		spin_unlock_irqrestore(&fifo->tx_lock, flags);
  		return NETDEV_TX_OK;
  	}
  
  	offload_type = s2io_offload_type(skb);
  	if (offload_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)) {
  		txdp->Control_1 |= TXD_TCP_LSO_EN;
  		txdp->Control_1 |= TXD_TCP_LSO_MSS(s2io_tcp_mss(skb));
  	}
  	if (skb->ip_summed == CHECKSUM_PARTIAL) {
  		txdp->Control_2 |= (TXD_TX_CKO_IPV4_EN |
  				    TXD_TX_CKO_TCP_EN |
  				    TXD_TX_CKO_UDP_EN);
  	}
  	txdp->Control_1 |= TXD_GATHER_CODE_FIRST;
  	txdp->Control_1 |= TXD_LIST_OWN_XENA;
  	txdp->Control_2 |= TXD_INT_NUMBER(fifo->fifo_no);
  	if (enable_per_list_interrupt)
  		if (put_off & (queue_len >> 5))
  			txdp->Control_2 |= TXD_INT_TYPE_PER_LIST;
  	if (vlan_tag) {
  		txdp->Control_2 |= TXD_VLAN_ENABLE;
  		txdp->Control_2 |= TXD_VLAN_TAG(vlan_tag);
  	}
  
  	frg_len = skb_headlen(skb);
  	txdp->Buffer_Pointer = dma_map_single(&sp->pdev->dev, skb->data,
  					      frg_len, DMA_TO_DEVICE);
  	if (dma_mapping_error(&sp->pdev->dev, txdp->Buffer_Pointer))
  		goto pci_map_failed;
  
  	txdp->Host_Control = (unsigned long)skb;
  	txdp->Control_1 |= TXD_BUFFER0_SIZE(frg_len);
  
  	frg_cnt = skb_shinfo(skb)->nr_frags;
  	/* For fragmented SKB. */
  	for (i = 0; i < frg_cnt; i++) {
  		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
  		/* A '0' length fragment will be ignored */
  		if (!skb_frag_size(frag))
  			continue;
  		txdp++;
  		txdp->Buffer_Pointer = (u64)skb_frag_dma_map(&sp->pdev->dev,
  							     frag, 0,
  							     skb_frag_size(frag),
  							     DMA_TO_DEVICE);
  		txdp->Control_1 = TXD_BUFFER0_SIZE(skb_frag_size(frag));
  	}
  	txdp->Control_1 |= TXD_GATHER_CODE_LAST;
  
  	tx_fifo = mac_control->tx_FIFO_start[queue];
  	val64 = fifo->list_info[put_off].list_phy_addr;
  	writeq(val64, &tx_fifo->TxDL_Pointer);
  
  	val64 = (TX_FIFO_LAST_TXD_NUM(frg_cnt) | TX_FIFO_FIRST_LIST |
  		 TX_FIFO_LAST_LIST);
  	if (offload_type)
  		val64 |= TX_FIFO_SPECIAL_FUNC;
  
  	writeq(val64, &tx_fifo->List_Control);
  
  	put_off++;
  	if (put_off == fifo->tx_curr_put_info.fifo_len + 1)
  		put_off = 0;
  	fifo->tx_curr_put_info.offset = put_off;
  
  	/* Avoid "put" pointer going beyond "get" pointer */
  	if (((put_off+1) == queue_len ? 0 : (put_off+1)) == get_off) {
  		swstats->fifo_full_cnt++;
  		DBG_PRINT(TX_DBG,
  			  "No free TxDs for xmit, Put: 0x%x Get:0x%x\n",
  			  put_off, get_off);
  		s2io_stop_tx_queue(sp, fifo->fifo_no);
  	}
  	swstats->mem_allocated += skb->truesize;
  	spin_unlock_irqrestore(&fifo->tx_lock, flags);
  
  	if (sp->config.intr_type == MSI_X)
  		tx_intr_handler(fifo);
  
  	return NETDEV_TX_OK;
  
  pci_map_failed:
  	swstats->pci_map_fail_cnt++;
  	s2io_stop_tx_queue(sp, fifo->fifo_no);
  	swstats->mem_freed += skb->truesize;
  	dev_kfree_skb_any(skb);
  	spin_unlock_irqrestore(&fifo->tx_lock, flags);
  	return NETDEV_TX_OK;
  }
  
  static void
  s2io_alarm_handle(struct timer_list *t)
  {
  	struct s2io_nic *sp = from_timer(sp, t, alarm_timer);
  	struct net_device *dev = sp->dev;
  
  	s2io_handle_errors(dev);
  	mod_timer(&sp->alarm_timer, jiffies + HZ / 2);
  }
  
  static irqreturn_t s2io_msix_ring_handle(int irq, void *dev_id)
  {
  	struct ring_info *ring = (struct ring_info *)dev_id;
  	struct s2io_nic *sp = ring->nic;
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  
  	if (unlikely(!is_s2io_card_up(sp)))
  		return IRQ_HANDLED;
  
  	if (sp->config.napi) {
  		u8 __iomem *addr = NULL;
  		u8 val8 = 0;
  
  		addr = (u8 __iomem *)&bar0->xmsi_mask_reg;
  		addr += (7 - ring->ring_no);
  		val8 = (ring->ring_no == 0) ? 0x7f : 0xff;
  		writeb(val8, addr);
  		val8 = readb(addr);
  		napi_schedule(&ring->napi);
  	} else {
  		rx_intr_handler(ring, 0);
  		s2io_chk_rx_buffers(sp, ring);
  	}
  
  	return IRQ_HANDLED;
  }
  
  static irqreturn_t s2io_msix_fifo_handle(int irq, void *dev_id)
  {
  	int i;
  	struct fifo_info *fifos = (struct fifo_info *)dev_id;
  	struct s2io_nic *sp = fifos->nic;
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	struct config_param *config  = &sp->config;
  	u64 reason;
  
  	if (unlikely(!is_s2io_card_up(sp)))
  		return IRQ_NONE;
  
  	reason = readq(&bar0->general_int_status);
  	if (unlikely(reason == S2IO_MINUS_ONE))
  		/* Nothing much can be done. Get out */
  		return IRQ_HANDLED;
  
  	if (reason & (GEN_INTR_TXPIC | GEN_INTR_TXTRAFFIC)) {
  		writeq(S2IO_MINUS_ONE, &bar0->general_int_mask);
  
  		if (reason & GEN_INTR_TXPIC)
  			s2io_txpic_intr_handle(sp);
  
  		if (reason & GEN_INTR_TXTRAFFIC)
  			writeq(S2IO_MINUS_ONE, &bar0->tx_traffic_int);
  
  		for (i = 0; i < config->tx_fifo_num; i++)
  			tx_intr_handler(&fifos[i]);
  
  		writeq(sp->general_int_mask, &bar0->general_int_mask);
  		readl(&bar0->general_int_status);
  		return IRQ_HANDLED;
  	}
  	/* The interrupt was not raised by us */
  	return IRQ_NONE;
  }
  
  static void s2io_txpic_intr_handle(struct s2io_nic *sp)
  {
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u64 val64;
  
  	val64 = readq(&bar0->pic_int_status);
  	if (val64 & PIC_INT_GPIO) {
  		val64 = readq(&bar0->gpio_int_reg);
  		if ((val64 & GPIO_INT_REG_LINK_DOWN) &&
  		    (val64 & GPIO_INT_REG_LINK_UP)) {
  			/*
  			 * This is unstable state so clear both up/down
  			 * interrupt and adapter to re-evaluate the link state.
  			 */
  			val64 |= GPIO_INT_REG_LINK_DOWN;
  			val64 |= GPIO_INT_REG_LINK_UP;
  			writeq(val64, &bar0->gpio_int_reg);
  			val64 = readq(&bar0->gpio_int_mask);
  			val64 &= ~(GPIO_INT_MASK_LINK_UP |
  				   GPIO_INT_MASK_LINK_DOWN);
  			writeq(val64, &bar0->gpio_int_mask);
  		} else if (val64 & GPIO_INT_REG_LINK_UP) {
  			val64 = readq(&bar0->adapter_status);
  			/* Enable Adapter */
  			val64 = readq(&bar0->adapter_control);
  			val64 |= ADAPTER_CNTL_EN;
  			writeq(val64, &bar0->adapter_control);
  			val64 |= ADAPTER_LED_ON;
  			writeq(val64, &bar0->adapter_control);
  			if (!sp->device_enabled_once)
  				sp->device_enabled_once = 1;
  
  			s2io_link(sp, LINK_UP);
  			/*
  			 * unmask link down interrupt and mask link-up
  			 * intr
  			 */
  			val64 = readq(&bar0->gpio_int_mask);
  			val64 &= ~GPIO_INT_MASK_LINK_DOWN;
  			val64 |= GPIO_INT_MASK_LINK_UP;
  			writeq(val64, &bar0->gpio_int_mask);
  
  		} else if (val64 & GPIO_INT_REG_LINK_DOWN) {
  			val64 = readq(&bar0->adapter_status);
  			s2io_link(sp, LINK_DOWN);
  			/* Link is down so unmaks link up interrupt */
  			val64 = readq(&bar0->gpio_int_mask);
  			val64 &= ~GPIO_INT_MASK_LINK_UP;
  			val64 |= GPIO_INT_MASK_LINK_DOWN;
  			writeq(val64, &bar0->gpio_int_mask);
  
  			/* turn off LED */
  			val64 = readq(&bar0->adapter_control);
  			val64 = val64 & (~ADAPTER_LED_ON);
  			writeq(val64, &bar0->adapter_control);
  		}
  	}
  	val64 = readq(&bar0->gpio_int_mask);
  }
  
  /**
   *  do_s2io_chk_alarm_bit - Check for alarm and incrment the counter
   *  @value: alarm bits
   *  @addr: address value
   *  @cnt: counter variable
   *  Description: Check for alarm and increment the counter
   *  Return Value:
   *  1 - if alarm bit set
   *  0 - if alarm bit is not set
   */
  static int do_s2io_chk_alarm_bit(u64 value, void __iomem *addr,
  				 unsigned long long *cnt)
  {
  	u64 val64;
  	val64 = readq(addr);
  	if (val64 & value) {
  		writeq(val64, addr);
  		(*cnt)++;
  		return 1;
  	}
  	return 0;
  
  }
  
  /**
   *  s2io_handle_errors - Xframe error indication handler
   *  @dev_id: opaque handle to dev
   *  Description: Handle alarms such as loss of link, single or
   *  double ECC errors, critical and serious errors.
   *  Return Value:
   *  NONE
   */
  static void s2io_handle_errors(void *dev_id)
  {
  	struct net_device *dev = (struct net_device *)dev_id;
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u64 temp64 = 0, val64 = 0;
  	int i = 0;
  
  	struct swStat *sw_stat = &sp->mac_control.stats_info->sw_stat;
  	struct xpakStat *stats = &sp->mac_control.stats_info->xpak_stat;
  
  	if (!is_s2io_card_up(sp))
  		return;
  
  	if (pci_channel_offline(sp->pdev))
  		return;
  
  	memset(&sw_stat->ring_full_cnt, 0,
  	       sizeof(sw_stat->ring_full_cnt));
  
  	/* Handling the XPAK counters update */
  	if (stats->xpak_timer_count < 72000) {
  		/* waiting for an hour */
  		stats->xpak_timer_count++;
  	} else {
  		s2io_updt_xpak_counter(dev);
  		/* reset the count to zero */
  		stats->xpak_timer_count = 0;
  	}
  
  	/* Handling link status change error Intr */
  	if (s2io_link_fault_indication(sp) == MAC_RMAC_ERR_TIMER) {
  		val64 = readq(&bar0->mac_rmac_err_reg);
  		writeq(val64, &bar0->mac_rmac_err_reg);
  		if (val64 & RMAC_LINK_STATE_CHANGE_INT)
  			schedule_work(&sp->set_link_task);
  	}
  
  	/* In case of a serious error, the device will be Reset. */
  	if (do_s2io_chk_alarm_bit(SERR_SOURCE_ANY, &bar0->serr_source,
  				  &sw_stat->serious_err_cnt))
  		goto reset;
  
  	/* Check for data parity error */
  	if (do_s2io_chk_alarm_bit(GPIO_INT_REG_DP_ERR_INT, &bar0->gpio_int_reg,
  				  &sw_stat->parity_err_cnt))
  		goto reset;
  
  	/* Check for ring full counter */
  	if (sp->device_type == XFRAME_II_DEVICE) {
  		val64 = readq(&bar0->ring_bump_counter1);
  		for (i = 0; i < 4; i++) {
  			temp64 = (val64 & vBIT(0xFFFF, (i*16), 16));
  			temp64 >>= 64 - ((i+1)*16);
  			sw_stat->ring_full_cnt[i] += temp64;
  		}
  
  		val64 = readq(&bar0->ring_bump_counter2);
  		for (i = 0; i < 4; i++) {
  			temp64 = (val64 & vBIT(0xFFFF, (i*16), 16));
  			temp64 >>= 64 - ((i+1)*16);
  			sw_stat->ring_full_cnt[i+4] += temp64;
  		}
  	}
  
  	val64 = readq(&bar0->txdma_int_status);
  	/*check for pfc_err*/
  	if (val64 & TXDMA_PFC_INT) {
  		if (do_s2io_chk_alarm_bit(PFC_ECC_DB_ERR | PFC_SM_ERR_ALARM |
  					  PFC_MISC_0_ERR | PFC_MISC_1_ERR |
  					  PFC_PCIX_ERR,
  					  &bar0->pfc_err_reg,
  					  &sw_stat->pfc_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(PFC_ECC_SG_ERR,
  				      &bar0->pfc_err_reg,
  				      &sw_stat->pfc_err_cnt);
  	}
  
  	/*check for tda_err*/
  	if (val64 & TXDMA_TDA_INT) {
  		if (do_s2io_chk_alarm_bit(TDA_Fn_ECC_DB_ERR |
  					  TDA_SM0_ERR_ALARM |
  					  TDA_SM1_ERR_ALARM,
  					  &bar0->tda_err_reg,
  					  &sw_stat->tda_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(TDA_Fn_ECC_SG_ERR | TDA_PCIX_ERR,
  				      &bar0->tda_err_reg,
  				      &sw_stat->tda_err_cnt);
  	}
  	/*check for pcc_err*/
  	if (val64 & TXDMA_PCC_INT) {
  		if (do_s2io_chk_alarm_bit(PCC_SM_ERR_ALARM | PCC_WR_ERR_ALARM |
  					  PCC_N_SERR | PCC_6_COF_OV_ERR |
  					  PCC_7_COF_OV_ERR | PCC_6_LSO_OV_ERR |
  					  PCC_7_LSO_OV_ERR | PCC_FB_ECC_DB_ERR |
  					  PCC_TXB_ECC_DB_ERR,
  					  &bar0->pcc_err_reg,
  					  &sw_stat->pcc_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(PCC_FB_ECC_SG_ERR | PCC_TXB_ECC_SG_ERR,
  				      &bar0->pcc_err_reg,
  				      &sw_stat->pcc_err_cnt);
  	}
  
  	/*check for tti_err*/
  	if (val64 & TXDMA_TTI_INT) {
  		if (do_s2io_chk_alarm_bit(TTI_SM_ERR_ALARM,
  					  &bar0->tti_err_reg,
  					  &sw_stat->tti_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(TTI_ECC_SG_ERR | TTI_ECC_DB_ERR,
  				      &bar0->tti_err_reg,
  				      &sw_stat->tti_err_cnt);
  	}
  
  	/*check for lso_err*/
  	if (val64 & TXDMA_LSO_INT) {
  		if (do_s2io_chk_alarm_bit(LSO6_ABORT | LSO7_ABORT |
  					  LSO6_SM_ERR_ALARM | LSO7_SM_ERR_ALARM,
  					  &bar0->lso_err_reg,
  					  &sw_stat->lso_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(LSO6_SEND_OFLOW | LSO7_SEND_OFLOW,
  				      &bar0->lso_err_reg,
  				      &sw_stat->lso_err_cnt);
  	}
  
  	/*check for tpa_err*/
  	if (val64 & TXDMA_TPA_INT) {
  		if (do_s2io_chk_alarm_bit(TPA_SM_ERR_ALARM,
  					  &bar0->tpa_err_reg,
  					  &sw_stat->tpa_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(TPA_TX_FRM_DROP,
  				      &bar0->tpa_err_reg,
  				      &sw_stat->tpa_err_cnt);
  	}
  
  	/*check for sm_err*/
  	if (val64 & TXDMA_SM_INT) {
  		if (do_s2io_chk_alarm_bit(SM_SM_ERR_ALARM,
  					  &bar0->sm_err_reg,
  					  &sw_stat->sm_err_cnt))
  			goto reset;
  	}
  
  	val64 = readq(&bar0->mac_int_status);
  	if (val64 & MAC_INT_STATUS_TMAC_INT) {
  		if (do_s2io_chk_alarm_bit(TMAC_TX_BUF_OVRN | TMAC_TX_SM_ERR,
  					  &bar0->mac_tmac_err_reg,
  					  &sw_stat->mac_tmac_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(TMAC_ECC_SG_ERR | TMAC_ECC_DB_ERR |
  				      TMAC_DESC_ECC_SG_ERR |
  				      TMAC_DESC_ECC_DB_ERR,
  				      &bar0->mac_tmac_err_reg,
  				      &sw_stat->mac_tmac_err_cnt);
  	}
  
  	val64 = readq(&bar0->xgxs_int_status);
  	if (val64 & XGXS_INT_STATUS_TXGXS) {
  		if (do_s2io_chk_alarm_bit(TXGXS_ESTORE_UFLOW | TXGXS_TX_SM_ERR,
  					  &bar0->xgxs_txgxs_err_reg,
  					  &sw_stat->xgxs_txgxs_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(TXGXS_ECC_SG_ERR | TXGXS_ECC_DB_ERR,
  				      &bar0->xgxs_txgxs_err_reg,
  				      &sw_stat->xgxs_txgxs_err_cnt);
  	}
  
  	val64 = readq(&bar0->rxdma_int_status);
  	if (val64 & RXDMA_INT_RC_INT_M) {
  		if (do_s2io_chk_alarm_bit(RC_PRCn_ECC_DB_ERR |
  					  RC_FTC_ECC_DB_ERR |
  					  RC_PRCn_SM_ERR_ALARM |
  					  RC_FTC_SM_ERR_ALARM,
  					  &bar0->rc_err_reg,
  					  &sw_stat->rc_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(RC_PRCn_ECC_SG_ERR |
  				      RC_FTC_ECC_SG_ERR |
  				      RC_RDA_FAIL_WR_Rn, &bar0->rc_err_reg,
  				      &sw_stat->rc_err_cnt);
  		if (do_s2io_chk_alarm_bit(PRC_PCI_AB_RD_Rn |
  					  PRC_PCI_AB_WR_Rn |
  					  PRC_PCI_AB_F_WR_Rn,
  					  &bar0->prc_pcix_err_reg,
  					  &sw_stat->prc_pcix_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(PRC_PCI_DP_RD_Rn |
  				      PRC_PCI_DP_WR_Rn |
  				      PRC_PCI_DP_F_WR_Rn,
  				      &bar0->prc_pcix_err_reg,
  				      &sw_stat->prc_pcix_err_cnt);
  	}
  
  	if (val64 & RXDMA_INT_RPA_INT_M) {
  		if (do_s2io_chk_alarm_bit(RPA_SM_ERR_ALARM | RPA_CREDIT_ERR,
  					  &bar0->rpa_err_reg,
  					  &sw_stat->rpa_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(RPA_ECC_SG_ERR | RPA_ECC_DB_ERR,
  				      &bar0->rpa_err_reg,
  				      &sw_stat->rpa_err_cnt);
  	}
  
  	if (val64 & RXDMA_INT_RDA_INT_M) {
  		if (do_s2io_chk_alarm_bit(RDA_RXDn_ECC_DB_ERR |
  					  RDA_FRM_ECC_DB_N_AERR |
  					  RDA_SM1_ERR_ALARM |
  					  RDA_SM0_ERR_ALARM |
  					  RDA_RXD_ECC_DB_SERR,
  					  &bar0->rda_err_reg,
  					  &sw_stat->rda_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(RDA_RXDn_ECC_SG_ERR |
  				      RDA_FRM_ECC_SG_ERR |
  				      RDA_MISC_ERR |
  				      RDA_PCIX_ERR,
  				      &bar0->rda_err_reg,
  				      &sw_stat->rda_err_cnt);
  	}
  
  	if (val64 & RXDMA_INT_RTI_INT_M) {
  		if (do_s2io_chk_alarm_bit(RTI_SM_ERR_ALARM,
  					  &bar0->rti_err_reg,
  					  &sw_stat->rti_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(RTI_ECC_SG_ERR | RTI_ECC_DB_ERR,
  				      &bar0->rti_err_reg,
  				      &sw_stat->rti_err_cnt);
  	}
  
  	val64 = readq(&bar0->mac_int_status);
  	if (val64 & MAC_INT_STATUS_RMAC_INT) {
  		if (do_s2io_chk_alarm_bit(RMAC_RX_BUFF_OVRN | RMAC_RX_SM_ERR,
  					  &bar0->mac_rmac_err_reg,
  					  &sw_stat->mac_rmac_err_cnt))
  			goto reset;
  		do_s2io_chk_alarm_bit(RMAC_UNUSED_INT |
  				      RMAC_SINGLE_ECC_ERR |
  				      RMAC_DOUBLE_ECC_ERR,
  				      &bar0->mac_rmac_err_reg,
  				      &sw_stat->mac_rmac_err_cnt);
  	}
  
  	val64 = readq(&bar0->xgxs_int_status);
  	if (val64 & XGXS_INT_STATUS_RXGXS) {
  		if (do_s2io_chk_alarm_bit(RXGXS_ESTORE_OFLOW | RXGXS_RX_SM_ERR,
  					  &bar0->xgxs_rxgxs_err_reg,
  					  &sw_stat->xgxs_rxgxs_err_cnt))
  			goto reset;
  	}
  
  	val64 = readq(&bar0->mc_int_status);
  	if (val64 & MC_INT_STATUS_MC_INT) {
  		if (do_s2io_chk_alarm_bit(MC_ERR_REG_SM_ERR,
  					  &bar0->mc_err_reg,
  					  &sw_stat->mc_err_cnt))
  			goto reset;
  
  		/* Handling Ecc errors */
  		if (val64 & (MC_ERR_REG_ECC_ALL_SNG | MC_ERR_REG_ECC_ALL_DBL)) {
  			writeq(val64, &bar0->mc_err_reg);
  			if (val64 & MC_ERR_REG_ECC_ALL_DBL) {
  				sw_stat->double_ecc_errs++;
  				if (sp->device_type != XFRAME_II_DEVICE) {
  					/*
  					 * Reset XframeI only if critical error
  					 */
  					if (val64 &
  					    (MC_ERR_REG_MIRI_ECC_DB_ERR_0 |
  					     MC_ERR_REG_MIRI_ECC_DB_ERR_1))
  						goto reset;
  				}
  			} else
  				sw_stat->single_ecc_errs++;
  		}
  	}
  	return;
  
  reset:
  	s2io_stop_all_tx_queue(sp);
  	schedule_work(&sp->rst_timer_task);
  	sw_stat->soft_reset_cnt++;
  }
  
  /**
   *  s2io_isr - ISR handler of the device .
   *  @irq: the irq of the device.
   *  @dev_id: a void pointer to the dev structure of the NIC.
   *  Description:  This function is the ISR handler of the device. It
   *  identifies the reason for the interrupt and calls the relevant
   *  service routines. As a contongency measure, this ISR allocates the
   *  recv buffers, if their numbers are below the panic value which is
   *  presently set to 25% of the original number of rcv buffers allocated.
   *  Return value:
   *   IRQ_HANDLED: will be returned if IRQ was handled by this routine
   *   IRQ_NONE: will be returned if interrupt is not from our device
   */
  static irqreturn_t s2io_isr(int irq, void *dev_id)
  {
  	struct net_device *dev = (struct net_device *)dev_id;
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	int i;
  	u64 reason = 0;
  	struct mac_info *mac_control;
  	struct config_param *config;
  
  	/* Pretend we handled any irq's from a disconnected card */
  	if (pci_channel_offline(sp->pdev))
  		return IRQ_NONE;
  
  	if (!is_s2io_card_up(sp))
  		return IRQ_NONE;
  
  	config = &sp->config;
  	mac_control = &sp->mac_control;
  
  	/*
  	 * Identify the cause for interrupt and call the appropriate
  	 * interrupt handler. Causes for the interrupt could be;
  	 * 1. Rx of packet.
  	 * 2. Tx complete.
  	 * 3. Link down.
  	 */
  	reason = readq(&bar0->general_int_status);
  
  	if (unlikely(reason == S2IO_MINUS_ONE))
  		return IRQ_HANDLED;	/* Nothing much can be done. Get out */
  
  	if (reason &
  	    (GEN_INTR_RXTRAFFIC | GEN_INTR_TXTRAFFIC | GEN_INTR_TXPIC)) {
  		writeq(S2IO_MINUS_ONE, &bar0->general_int_mask);
  
  		if (config->napi) {
  			if (reason & GEN_INTR_RXTRAFFIC) {
  				napi_schedule(&sp->napi);
  				writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_mask);
  				writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_int);
  				readl(&bar0->rx_traffic_int);
  			}
  		} else {
  			/*
  			 * rx_traffic_int reg is an R1 register, writing all 1's
  			 * will ensure that the actual interrupt causing bit
  			 * get's cleared and hence a read can be avoided.
  			 */
  			if (reason & GEN_INTR_RXTRAFFIC)
  				writeq(S2IO_MINUS_ONE, &bar0->rx_traffic_int);
  
  			for (i = 0; i < config->rx_ring_num; i++) {
  				struct ring_info *ring = &mac_control->rings[i];
  
  				rx_intr_handler(ring, 0);
  			}
  		}
  
  		/*
  		 * tx_traffic_int reg is an R1 register, writing all 1's
  		 * will ensure that the actual interrupt causing bit get's
  		 * cleared and hence a read can be avoided.
  		 */
  		if (reason & GEN_INTR_TXTRAFFIC)
  			writeq(S2IO_MINUS_ONE, &bar0->tx_traffic_int);
  
  		for (i = 0; i < config->tx_fifo_num; i++)
  			tx_intr_handler(&mac_control->fifos[i]);
  
  		if (reason & GEN_INTR_TXPIC)
  			s2io_txpic_intr_handle(sp);
  
  		/*
  		 * Reallocate the buffers from the interrupt handler itself.
  		 */
  		if (!config->napi) {
  			for (i = 0; i < config->rx_ring_num; i++) {
  				struct ring_info *ring = &mac_control->rings[i];
  
  				s2io_chk_rx_buffers(sp, ring);
  			}
  		}
  		writeq(sp->general_int_mask, &bar0->general_int_mask);
  		readl(&bar0->general_int_status);
  
  		return IRQ_HANDLED;
  
  	} else if (!reason) {
  		/* The interrupt was not raised by us */
  		return IRQ_NONE;
  	}
  
  	return IRQ_HANDLED;
  }
  
  /*
   * s2io_updt_stats -
   */
  static void s2io_updt_stats(struct s2io_nic *sp)
  {
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u64 val64;
  	int cnt = 0;
  
  	if (is_s2io_card_up(sp)) {
  		/* Apprx 30us on a 133 MHz bus */
  		val64 = SET_UPDT_CLICKS(10) |
  			STAT_CFG_ONE_SHOT_EN | STAT_CFG_STAT_EN;
  		writeq(val64, &bar0->stat_cfg);
  		do {
  			udelay(100);
  			val64 = readq(&bar0->stat_cfg);
  			if (!(val64 & s2BIT(0)))
  				break;
  			cnt++;
  			if (cnt == 5)
  				break; /* Updt failed */
  		} while (1);
  	}
  }
  
  /**
   *  s2io_get_stats - Updates the device statistics structure.
   *  @dev : pointer to the device structure.
   *  Description:
   *  This function updates the device statistics structure in the s2io_nic
   *  structure and returns a pointer to the same.
   *  Return value:
   *  pointer to the updated net_device_stats structure.
   */
  static struct net_device_stats *s2io_get_stats(struct net_device *dev)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct mac_info *mac_control = &sp->mac_control;
  	struct stat_block *stats = mac_control->stats_info;
  	u64 delta;
  
  	/* Configure Stats for immediate updt */
  	s2io_updt_stats(sp);
  
  	/* A device reset will cause the on-adapter statistics to be zero'ed.
  	 * This can be done while running by changing the MTU.  To prevent the
  	 * system from having the stats zero'ed, the driver keeps a copy of the
  	 * last update to the system (which is also zero'ed on reset).  This
  	 * enables the driver to accurately know the delta between the last
  	 * update and the current update.
  	 */
  	delta = ((u64) le32_to_cpu(stats->rmac_vld_frms_oflow) << 32 |
  		le32_to_cpu(stats->rmac_vld_frms)) - sp->stats.rx_packets;
  	sp->stats.rx_packets += delta;
  	dev->stats.rx_packets += delta;
  
  	delta = ((u64) le32_to_cpu(stats->tmac_frms_oflow) << 32 |
  		le32_to_cpu(stats->tmac_frms)) - sp->stats.tx_packets;
  	sp->stats.tx_packets += delta;
  	dev->stats.tx_packets += delta;
  
  	delta = ((u64) le32_to_cpu(stats->rmac_data_octets_oflow) << 32 |
  		le32_to_cpu(stats->rmac_data_octets)) - sp->stats.rx_bytes;
  	sp->stats.rx_bytes += delta;
  	dev->stats.rx_bytes += delta;
  
  	delta = ((u64) le32_to_cpu(stats->tmac_data_octets_oflow) << 32 |
  		le32_to_cpu(stats->tmac_data_octets)) - sp->stats.tx_bytes;
  	sp->stats.tx_bytes += delta;
  	dev->stats.tx_bytes += delta;
  
  	delta = le64_to_cpu(stats->rmac_drop_frms) - sp->stats.rx_errors;
  	sp->stats.rx_errors += delta;
  	dev->stats.rx_errors += delta;
  
  	delta = ((u64) le32_to_cpu(stats->tmac_any_err_frms_oflow) << 32 |
  		le32_to_cpu(stats->tmac_any_err_frms)) - sp->stats.tx_errors;
  	sp->stats.tx_errors += delta;
  	dev->stats.tx_errors += delta;
  
  	delta = le64_to_cpu(stats->rmac_drop_frms) - sp->stats.rx_dropped;
  	sp->stats.rx_dropped += delta;
  	dev->stats.rx_dropped += delta;
  
  	delta = le64_to_cpu(stats->tmac_drop_frms) - sp->stats.tx_dropped;
  	sp->stats.tx_dropped += delta;
  	dev->stats.tx_dropped += delta;
  
  	/* The adapter MAC interprets pause frames as multicast packets, but
  	 * does not pass them up.  This erroneously increases the multicast
  	 * packet count and needs to be deducted when the multicast frame count
  	 * is queried.
  	 */
  	delta = (u64) le32_to_cpu(stats->rmac_vld_mcst_frms_oflow) << 32 |
  		le32_to_cpu(stats->rmac_vld_mcst_frms);
  	delta -= le64_to_cpu(stats->rmac_pause_ctrl_frms);
  	delta -= sp->stats.multicast;
  	sp->stats.multicast += delta;
  	dev->stats.multicast += delta;
  
  	delta = ((u64) le32_to_cpu(stats->rmac_usized_frms_oflow) << 32 |
  		le32_to_cpu(stats->rmac_usized_frms)) +
  		le64_to_cpu(stats->rmac_long_frms) - sp->stats.rx_length_errors;
  	sp->stats.rx_length_errors += delta;
  	dev->stats.rx_length_errors += delta;
  
  	delta = le64_to_cpu(stats->rmac_fcs_err_frms) - sp->stats.rx_crc_errors;
  	sp->stats.rx_crc_errors += delta;
  	dev->stats.rx_crc_errors += delta;
  
  	return &dev->stats;
  }
  
  /**
   *  s2io_set_multicast - entry point for multicast address enable/disable.
   *  @dev : pointer to the device structure
   *  @may_sleep: parameter indicates if sleeping when waiting for command
   *  complete
   *  Description:
   *  This function is a driver entry point which gets called by the kernel
   *  whenever multicast addresses must be enabled/disabled. This also gets
   *  called to set/reset promiscuous mode. Depending on the deivce flag, we
   *  determine, if multicast address must be enabled or if promiscuous mode
   *  is to be disabled etc.
   *  Return value:
   *  void.
   */
  static void s2io_set_multicast(struct net_device *dev, bool may_sleep)
  {
  	int i, j, prev_cnt;
  	struct netdev_hw_addr *ha;
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u64 val64 = 0, multi_mac = 0x010203040506ULL, mask =
  		0xfeffffffffffULL;
  	u64 dis_addr = S2IO_DISABLE_MAC_ENTRY, mac_addr = 0;
  	void __iomem *add;
  	struct config_param *config = &sp->config;
  
  	if ((dev->flags & IFF_ALLMULTI) && (!sp->m_cast_flg)) {
  		/*  Enable all Multicast addresses */
  		writeq(RMAC_ADDR_DATA0_MEM_ADDR(multi_mac),
  		       &bar0->rmac_addr_data0_mem);
  		writeq(RMAC_ADDR_DATA1_MEM_MASK(mask),
  		       &bar0->rmac_addr_data1_mem);
  		val64 = RMAC_ADDR_CMD_MEM_WE |
  			RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
  			RMAC_ADDR_CMD_MEM_OFFSET(config->max_mc_addr - 1);
  		writeq(val64, &bar0->rmac_addr_cmd_mem);
  		/* Wait till command completes */
  		wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
  				      RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
  				      S2IO_BIT_RESET, may_sleep);
  
  		sp->m_cast_flg = 1;
  		sp->all_multi_pos = config->max_mc_addr - 1;
  	} else if ((dev->flags & IFF_ALLMULTI) && (sp->m_cast_flg)) {
  		/*  Disable all Multicast addresses */
  		writeq(RMAC_ADDR_DATA0_MEM_ADDR(dis_addr),
  		       &bar0->rmac_addr_data0_mem);
  		writeq(RMAC_ADDR_DATA1_MEM_MASK(0x0),
  		       &bar0->rmac_addr_data1_mem);
  		val64 = RMAC_ADDR_CMD_MEM_WE |
  			RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
  			RMAC_ADDR_CMD_MEM_OFFSET(sp->all_multi_pos);
  		writeq(val64, &bar0->rmac_addr_cmd_mem);
  		/* Wait till command completes */
  		wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
  				      RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
  				      S2IO_BIT_RESET, may_sleep);
  
  		sp->m_cast_flg = 0;
  		sp->all_multi_pos = 0;
  	}
  
  	if ((dev->flags & IFF_PROMISC) && (!sp->promisc_flg)) {
  		/*  Put the NIC into promiscuous mode */
  		add = &bar0->mac_cfg;
  		val64 = readq(&bar0->mac_cfg);
  		val64 |= MAC_CFG_RMAC_PROM_ENABLE;
  
  		writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
  		writel((u32)val64, add);
  		writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
  		writel((u32) (val64 >> 32), (add + 4));
  
  		if (vlan_tag_strip != 1) {
  			val64 = readq(&bar0->rx_pa_cfg);
  			val64 &= ~RX_PA_CFG_STRIP_VLAN_TAG;
  			writeq(val64, &bar0->rx_pa_cfg);
  			sp->vlan_strip_flag = 0;
  		}
  
  		val64 = readq(&bar0->mac_cfg);
  		sp->promisc_flg = 1;
  		DBG_PRINT(INFO_DBG, "%s: entered promiscuous mode\n",
  			  dev->name);
  	} else if (!(dev->flags & IFF_PROMISC) && (sp->promisc_flg)) {
  		/*  Remove the NIC from promiscuous mode */
  		add = &bar0->mac_cfg;
  		val64 = readq(&bar0->mac_cfg);
  		val64 &= ~MAC_CFG_RMAC_PROM_ENABLE;
  
  		writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
  		writel((u32)val64, add);
  		writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
  		writel((u32) (val64 >> 32), (add + 4));
  
  		if (vlan_tag_strip != 0) {
  			val64 = readq(&bar0->rx_pa_cfg);
  			val64 |= RX_PA_CFG_STRIP_VLAN_TAG;
  			writeq(val64, &bar0->rx_pa_cfg);
  			sp->vlan_strip_flag = 1;
  		}
  
  		val64 = readq(&bar0->mac_cfg);
  		sp->promisc_flg = 0;
  		DBG_PRINT(INFO_DBG, "%s: left promiscuous mode\n", dev->name);
  	}
  
  	/*  Update individual M_CAST address list */
  	if ((!sp->m_cast_flg) && netdev_mc_count(dev)) {
  		if (netdev_mc_count(dev) >
  		    (config->max_mc_addr - config->max_mac_addr)) {
  			DBG_PRINT(ERR_DBG,
  				  "%s: No more Rx filters can be added - "
  				  "please enable ALL_MULTI instead\n",
  				  dev->name);
  			return;
  		}
  
  		prev_cnt = sp->mc_addr_count;
  		sp->mc_addr_count = netdev_mc_count(dev);
  
  		/* Clear out the previous list of Mc in the H/W. */
  		for (i = 0; i < prev_cnt; i++) {
  			writeq(RMAC_ADDR_DATA0_MEM_ADDR(dis_addr),
  			       &bar0->rmac_addr_data0_mem);
  			writeq(RMAC_ADDR_DATA1_MEM_MASK(0ULL),
  			       &bar0->rmac_addr_data1_mem);
  			val64 = RMAC_ADDR_CMD_MEM_WE |
  				RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
  				RMAC_ADDR_CMD_MEM_OFFSET
  				(config->mc_start_offset + i);
  			writeq(val64, &bar0->rmac_addr_cmd_mem);
  
  			/* Wait for command completes */
  			if (wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
  						  RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
  						  S2IO_BIT_RESET, may_sleep)) {
  				DBG_PRINT(ERR_DBG,
  					  "%s: Adding Multicasts failed\n",
  					  dev->name);
  				return;
  			}
  		}
  
  		/* Create the new Rx filter list and update the same in H/W. */
  		i = 0;
  		netdev_for_each_mc_addr(ha, dev) {
  			mac_addr = 0;
  			for (j = 0; j < ETH_ALEN; j++) {
  				mac_addr |= ha->addr[j];
  				mac_addr <<= 8;
  			}
  			mac_addr >>= 8;
  			writeq(RMAC_ADDR_DATA0_MEM_ADDR(mac_addr),
  			       &bar0->rmac_addr_data0_mem);
  			writeq(RMAC_ADDR_DATA1_MEM_MASK(0ULL),
  			       &bar0->rmac_addr_data1_mem);
  			val64 = RMAC_ADDR_CMD_MEM_WE |
  				RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
  				RMAC_ADDR_CMD_MEM_OFFSET
  				(i + config->mc_start_offset);
  			writeq(val64, &bar0->rmac_addr_cmd_mem);
  
  			/* Wait for command completes */
  			if (wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
  						  RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
  						  S2IO_BIT_RESET, may_sleep)) {
  				DBG_PRINT(ERR_DBG,
  					  "%s: Adding Multicasts failed\n",
  					  dev->name);
  				return;
  			}
  			i++;
  		}
  	}
  }
  
  /* NDO wrapper for s2io_set_multicast */
  static void s2io_ndo_set_multicast(struct net_device *dev)
  {
  	s2io_set_multicast(dev, false);
  }
  
  /* read from CAM unicast & multicast addresses and store it in
   * def_mac_addr structure
   */
  static void do_s2io_store_unicast_mc(struct s2io_nic *sp)
  {
  	int offset;
  	u64 mac_addr = 0x0;
  	struct config_param *config = &sp->config;
  
  	/* store unicast & multicast mac addresses */
  	for (offset = 0; offset < config->max_mc_addr; offset++) {
  		mac_addr = do_s2io_read_unicast_mc(sp, offset);
  		/* if read fails disable the entry */
  		if (mac_addr == FAILURE)
  			mac_addr = S2IO_DISABLE_MAC_ENTRY;
  		do_s2io_copy_mac_addr(sp, offset, mac_addr);
  	}
  }
  
  /* restore unicast & multicast MAC to CAM from def_mac_addr structure */
  static void do_s2io_restore_unicast_mc(struct s2io_nic *sp)
  {
  	int offset;
  	struct config_param *config = &sp->config;
  	/* restore unicast mac address */
  	for (offset = 0; offset < config->max_mac_addr; offset++)
  		do_s2io_prog_unicast(sp->dev,
  				     sp->def_mac_addr[offset].mac_addr);
  
  	/* restore multicast mac address */
  	for (offset = config->mc_start_offset;
  	     offset < config->max_mc_addr; offset++)
  		do_s2io_add_mc(sp, sp->def_mac_addr[offset].mac_addr);
  }
  
  /* add a multicast MAC address to CAM */
  static int do_s2io_add_mc(struct s2io_nic *sp, u8 *addr)
  {
  	int i;
  	u64 mac_addr = 0;
  	struct config_param *config = &sp->config;
  
  	for (i = 0; i < ETH_ALEN; i++) {
  		mac_addr <<= 8;
  		mac_addr |= addr[i];
  	}
  	if ((0ULL == mac_addr) || (mac_addr == S2IO_DISABLE_MAC_ENTRY))
  		return SUCCESS;
  
  	/* check if the multicast mac already preset in CAM */
  	for (i = config->mc_start_offset; i < config->max_mc_addr; i++) {
  		u64 tmp64;
  		tmp64 = do_s2io_read_unicast_mc(sp, i);
  		if (tmp64 == S2IO_DISABLE_MAC_ENTRY) /* CAM entry is empty */
  			break;
  
  		if (tmp64 == mac_addr)
  			return SUCCESS;
  	}
  	if (i == config->max_mc_addr) {
  		DBG_PRINT(ERR_DBG,
  			  "CAM full no space left for multicast MAC\n");
  		return FAILURE;
  	}
  	/* Update the internal structure with this new mac address */
  	do_s2io_copy_mac_addr(sp, i, mac_addr);
  
  	return do_s2io_add_mac(sp, mac_addr, i);
  }
  
  /* add MAC address to CAM */
  static int do_s2io_add_mac(struct s2io_nic *sp, u64 addr, int off)
  {
  	u64 val64;
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  
  	writeq(RMAC_ADDR_DATA0_MEM_ADDR(addr),
  	       &bar0->rmac_addr_data0_mem);
  
  	val64 =	RMAC_ADDR_CMD_MEM_WE | RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
  		RMAC_ADDR_CMD_MEM_OFFSET(off);
  	writeq(val64, &bar0->rmac_addr_cmd_mem);
  
  	/* Wait till command completes */
  	if (wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
  				  RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
  				  S2IO_BIT_RESET, true)) {
  		DBG_PRINT(INFO_DBG, "do_s2io_add_mac failed\n");
  		return FAILURE;
  	}
  	return SUCCESS;
  }
  /* deletes a specified unicast/multicast mac entry from CAM */
  static int do_s2io_delete_unicast_mc(struct s2io_nic *sp, u64 addr)
  {
  	int offset;
  	u64 dis_addr = S2IO_DISABLE_MAC_ENTRY, tmp64;
  	struct config_param *config = &sp->config;
  
  	for (offset = 1;
  	     offset < config->max_mc_addr; offset++) {
  		tmp64 = do_s2io_read_unicast_mc(sp, offset);
  		if (tmp64 == addr) {
  			/* disable the entry by writing  0xffffffffffffULL */
  			if (do_s2io_add_mac(sp, dis_addr, offset) ==  FAILURE)
  				return FAILURE;
  			/* store the new mac list from CAM */
  			do_s2io_store_unicast_mc(sp);
  			return SUCCESS;
  		}
  	}
  	DBG_PRINT(ERR_DBG, "MAC address 0x%llx not found in CAM\n",
  		  (unsigned long long)addr);
  	return FAILURE;
  }
  
  /* read mac entries from CAM */
  static u64 do_s2io_read_unicast_mc(struct s2io_nic *sp, int offset)
  {
  	u64 tmp64, val64;
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  
  	/* read mac addr */
  	val64 =	RMAC_ADDR_CMD_MEM_RD | RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
  		RMAC_ADDR_CMD_MEM_OFFSET(offset);
  	writeq(val64, &bar0->rmac_addr_cmd_mem);
  
  	/* Wait till command completes */
  	if (wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
  				  RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
  				  S2IO_BIT_RESET, true)) {
  		DBG_PRINT(INFO_DBG, "do_s2io_read_unicast_mc failed\n");
  		return FAILURE;
  	}
  	tmp64 = readq(&bar0->rmac_addr_data0_mem);
  
  	return tmp64 >> 16;
  }
  
  /*
   * s2io_set_mac_addr - driver entry point
   */
  
  static int s2io_set_mac_addr(struct net_device *dev, void *p)
  {
  	struct sockaddr *addr = p;
  
  	if (!is_valid_ether_addr(addr->sa_data))
  		return -EADDRNOTAVAIL;
  
  	eth_hw_addr_set(dev, addr->sa_data);
  
  	/* store the MAC address in CAM */
  	return do_s2io_prog_unicast(dev, dev->dev_addr);
  }
  /**
   *  do_s2io_prog_unicast - Programs the Xframe mac address
   *  @dev : pointer to the device structure.
   *  @addr: a uchar pointer to the new mac address which is to be set.
   *  Description : This procedure will program the Xframe to receive
   *  frames with new Mac Address
   *  Return value: SUCCESS on success and an appropriate (-)ve integer
   *  as defined in errno.h file on failure.
   */
  
  static int do_s2io_prog_unicast(struct net_device *dev, const u8 *addr)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	register u64 mac_addr = 0, perm_addr = 0;
  	int i;
  	u64 tmp64;
  	struct config_param *config = &sp->config;
  
  	/*
  	 * Set the new MAC address as the new unicast filter and reflect this
  	 * change on the device address registered with the OS. It will be
  	 * at offset 0.
  	 */
  	for (i = 0; i < ETH_ALEN; i++) {
  		mac_addr <<= 8;
  		mac_addr |= addr[i];
  		perm_addr <<= 8;
  		perm_addr |= sp->def_mac_addr[0].mac_addr[i];
  	}
  
  	/* check if the dev_addr is different than perm_addr */
  	if (mac_addr == perm_addr)
  		return SUCCESS;
  
  	/* check if the mac already preset in CAM */
  	for (i = 1; i < config->max_mac_addr; i++) {
  		tmp64 = do_s2io_read_unicast_mc(sp, i);
  		if (tmp64 == S2IO_DISABLE_MAC_ENTRY) /* CAM entry is empty */
  			break;
  
  		if (tmp64 == mac_addr) {
  			DBG_PRINT(INFO_DBG,
  				  "MAC addr:0x%llx already present in CAM\n",
  				  (unsigned long long)mac_addr);
  			return SUCCESS;
  		}
  	}
  	if (i == config->max_mac_addr) {
  		DBG_PRINT(ERR_DBG, "CAM full no space left for Unicast MAC\n");
  		return FAILURE;
  	}
  	/* Update the internal structure with this new mac address */
  	do_s2io_copy_mac_addr(sp, i, mac_addr);
  
  	return do_s2io_add_mac(sp, mac_addr, i);
  }
  
  /**
   * s2io_ethtool_set_link_ksettings - Sets different link parameters.
   * @dev : pointer to netdev
   * @cmd: pointer to the structure with parameters given by ethtool to set
   * link information.
   * Description:
   * The function sets different link parameters provided by the user onto
   * the NIC.
   * Return value:
   * 0 on success.
   */
  
  static int
  s2io_ethtool_set_link_ksettings(struct net_device *dev,
  				const struct ethtool_link_ksettings *cmd)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	if ((cmd->base.autoneg == AUTONEG_ENABLE) ||
  	    (cmd->base.speed != SPEED_10000) ||
  	    (cmd->base.duplex != DUPLEX_FULL))
  		return -EINVAL;
  	else {
  		s2io_close(sp->dev);
  		s2io_open(sp->dev);
  	}
  
  	return 0;
  }
  
  /**
   * s2io_ethtool_get_link_ksettings - Return link specific information.
   * @dev: pointer to netdev
   * @cmd : pointer to the structure with parameters given by ethtool
   * to return link information.
   * Description:
   * Returns link specific information like speed, duplex etc.. to ethtool.
   * Return value :
   * return 0 on success.
   */
  
  static int
  s2io_ethtool_get_link_ksettings(struct net_device *dev,
  				struct ethtool_link_ksettings *cmd)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  
  	ethtool_link_ksettings_zero_link_mode(cmd, supported);
  	ethtool_link_ksettings_add_link_mode(cmd, supported, 10000baseT_Full);
  	ethtool_link_ksettings_add_link_mode(cmd, supported, FIBRE);
  
  	ethtool_link_ksettings_zero_link_mode(cmd, advertising);
  	ethtool_link_ksettings_add_link_mode(cmd, advertising, 10000baseT_Full);
  	ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
  
  	cmd->base.port = PORT_FIBRE;
  
  	if (netif_carrier_ok(sp->dev)) {
  		cmd->base.speed = SPEED_10000;
  		cmd->base.duplex = DUPLEX_FULL;
  	} else {
  		cmd->base.speed = SPEED_UNKNOWN;
  		cmd->base.duplex = DUPLEX_UNKNOWN;
  	}
  
  	cmd->base.autoneg = AUTONEG_DISABLE;
  	return 0;
  }
  
  /**
   * s2io_ethtool_gdrvinfo - Returns driver specific information.
   * @dev: pointer to netdev
   * @info : pointer to the structure with parameters given by ethtool to
   * return driver information.
   * Description:
   * Returns driver specefic information like name, version etc.. to ethtool.
   * Return value:
   *  void
   */
  
  static void s2io_ethtool_gdrvinfo(struct net_device *dev,
  				  struct ethtool_drvinfo *info)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  
  	strlcpy(info->driver, s2io_driver_name, sizeof(info->driver));
  	strlcpy(info->version, s2io_driver_version, sizeof(info->version));
  	strlcpy(info->bus_info, pci_name(sp->pdev), sizeof(info->bus_info));
  }
  
  /**
   *  s2io_ethtool_gregs - dumps the entire space of Xfame into the buffer.
   *  @dev: pointer to netdev
   *  @regs : pointer to the structure with parameters given by ethtool for
   *          dumping the registers.
   *  @space: The input argument into which all the registers are dumped.
   *  Description:
   *  Dumps the entire register space of xFrame NIC into the user given
   *  buffer area.
   * Return value :
   * void .
   */
  
  static void s2io_ethtool_gregs(struct net_device *dev,
  			       struct ethtool_regs *regs, void *space)
  {
  	int i;
  	u64 reg;
  	u8 *reg_space = (u8 *)space;
  	struct s2io_nic *sp = netdev_priv(dev);
  
  	regs->len = XENA_REG_SPACE;
  	regs->version = sp->pdev->subsystem_device;
  
  	for (i = 0; i < regs->len; i += 8) {
  		reg = readq(sp->bar0 + i);
  		memcpy((reg_space + i), &reg, 8);
  	}
  }
  
  /*
   *  s2io_set_led - control NIC led
   */
  static void s2io_set_led(struct s2io_nic *sp, bool on)
  {
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u16 subid = sp->pdev->subsystem_device;
  	u64 val64;
  
  	if ((sp->device_type == XFRAME_II_DEVICE) ||
  	    ((subid & 0xFF) >= 0x07)) {
  		val64 = readq(&bar0->gpio_control);
  		if (on)
  			val64 |= GPIO_CTRL_GPIO_0;
  		else
  			val64 &= ~GPIO_CTRL_GPIO_0;
  
  		writeq(val64, &bar0->gpio_control);
  	} else {
  		val64 = readq(&bar0->adapter_control);
  		if (on)
  			val64 |= ADAPTER_LED_ON;
  		else
  			val64 &= ~ADAPTER_LED_ON;
  
  		writeq(val64, &bar0->adapter_control);
  	}
  
  }
  
  /**
   * s2io_ethtool_set_led - To physically identify the nic on the system.
   * @dev : network device
   * @state: led setting
   *
   * Description: Used to physically identify the NIC on the system.
   * The Link LED will blink for a time specified by the user for
   * identification.
   * NOTE: The Link has to be Up to be able to blink the LED. Hence
   * identification is possible only if it's link is up.
   */
  
  static int s2io_ethtool_set_led(struct net_device *dev,
  				enum ethtool_phys_id_state state)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u16 subid = sp->pdev->subsystem_device;
  
  	if ((sp->device_type == XFRAME_I_DEVICE) && ((subid & 0xFF) < 0x07)) {
  		u64 val64 = readq(&bar0->adapter_control);
  		if (!(val64 & ADAPTER_CNTL_EN)) {
  			pr_err("Adapter Link down, cannot blink LED\n");
  			return -EAGAIN;
  		}
  	}
  
  	switch (state) {
  	case ETHTOOL_ID_ACTIVE:
  		sp->adapt_ctrl_org = readq(&bar0->gpio_control);
  		return 1;	/* cycle on/off once per second */
  
  	case ETHTOOL_ID_ON:
  		s2io_set_led(sp, true);
  		break;
  
  	case ETHTOOL_ID_OFF:
  		s2io_set_led(sp, false);
  		break;
  
  	case ETHTOOL_ID_INACTIVE:
  		if (CARDS_WITH_FAULTY_LINK_INDICATORS(sp->device_type, subid))
  			writeq(sp->adapt_ctrl_org, &bar0->gpio_control);
  	}
  
  	return 0;
  }
  
  static void s2io_ethtool_gringparam(struct net_device *dev,
  				    struct ethtool_ringparam *ering)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	int i, tx_desc_count = 0, rx_desc_count = 0;
  
  	if (sp->rxd_mode == RXD_MODE_1) {
  		ering->rx_max_pending = MAX_RX_DESC_1;
  		ering->rx_jumbo_max_pending = MAX_RX_DESC_1;
  	} else {
  		ering->rx_max_pending = MAX_RX_DESC_2;
  		ering->rx_jumbo_max_pending = MAX_RX_DESC_2;
  	}
  
  	ering->tx_max_pending = MAX_TX_DESC;
  
  	for (i = 0; i < sp->config.rx_ring_num; i++)
  		rx_desc_count += sp->config.rx_cfg[i].num_rxd;
  	ering->rx_pending = rx_desc_count;
  	ering->rx_jumbo_pending = rx_desc_count;
  
  	for (i = 0; i < sp->config.tx_fifo_num; i++)
  		tx_desc_count += sp->config.tx_cfg[i].fifo_len;
  	ering->tx_pending = tx_desc_count;
  	DBG_PRINT(INFO_DBG, "max txds: %d\n", sp->config.max_txds);
  }
  
  /**
   * s2io_ethtool_getpause_data -Pause frame frame generation and reception.
   * @dev: pointer to netdev
   * @ep : pointer to the structure with pause parameters given by ethtool.
   * Description:
   * Returns the Pause frame generation and reception capability of the NIC.
   * Return value:
   *  void
   */
  static void s2io_ethtool_getpause_data(struct net_device *dev,
  				       struct ethtool_pauseparam *ep)
  {
  	u64 val64;
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  
  	val64 = readq(&bar0->rmac_pause_cfg);
  	if (val64 & RMAC_PAUSE_GEN_ENABLE)
  		ep->tx_pause = true;
  	if (val64 & RMAC_PAUSE_RX_ENABLE)
  		ep->rx_pause = true;
  	ep->autoneg = false;
  }
  
  /**
   * s2io_ethtool_setpause_data -  set/reset pause frame generation.
   * @dev: pointer to netdev
   * @ep : pointer to the structure with pause parameters given by ethtool.
   * Description:
   * It can be used to set or reset Pause frame generation or reception
   * support of the NIC.
   * Return value:
   * int, returns 0 on Success
   */
  
  static int s2io_ethtool_setpause_data(struct net_device *dev,
  				      struct ethtool_pauseparam *ep)
  {
  	u64 val64;
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  
  	val64 = readq(&bar0->rmac_pause_cfg);
  	if (ep->tx_pause)
  		val64 |= RMAC_PAUSE_GEN_ENABLE;
  	else
  		val64 &= ~RMAC_PAUSE_GEN_ENABLE;
  	if (ep->rx_pause)
  		val64 |= RMAC_PAUSE_RX_ENABLE;
  	else
  		val64 &= ~RMAC_PAUSE_RX_ENABLE;
  	writeq(val64, &bar0->rmac_pause_cfg);
  	return 0;
  }
  
  #define S2IO_DEV_ID		5
  /**
   * read_eeprom - reads 4 bytes of data from user given offset.
   * @sp : private member of the device structure, which is a pointer to the
   *      s2io_nic structure.
   * @off : offset at which the data must be written
   * @data : Its an output parameter where the data read at the given
   *	offset is stored.
   * Description:
   * Will read 4 bytes of data from the user given offset and return the
   * read data.
   * NOTE: Will allow to read only part of the EEPROM visible through the
   *   I2C bus.
   * Return value:
   *  -1 on failure and 0 on success.
   */
  static int read_eeprom(struct s2io_nic *sp, int off, u64 *data)
  {
  	int ret = -1;
  	u32 exit_cnt = 0;
  	u64 val64;
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  
  	if (sp->device_type == XFRAME_I_DEVICE) {
  		val64 = I2C_CONTROL_DEV_ID(S2IO_DEV_ID) |
  			I2C_CONTROL_ADDR(off) |
  			I2C_CONTROL_BYTE_CNT(0x3) |
  			I2C_CONTROL_READ |
  			I2C_CONTROL_CNTL_START;
  		SPECIAL_REG_WRITE(val64, &bar0->i2c_control, LF);
  
  		while (exit_cnt < 5) {
  			val64 = readq(&bar0->i2c_control);
  			if (I2C_CONTROL_CNTL_END(val64)) {
  				*data = I2C_CONTROL_GET_DATA(val64);
  				ret = 0;
  				break;
  			}
  			msleep(50);
  			exit_cnt++;
  		}
  	}
  
  	if (sp->device_type == XFRAME_II_DEVICE) {
  		val64 = SPI_CONTROL_KEY(0x9) | SPI_CONTROL_SEL1 |
  			SPI_CONTROL_BYTECNT(0x3) |
  			SPI_CONTROL_CMD(0x3) | SPI_CONTROL_ADDR(off);
  		SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
  		val64 |= SPI_CONTROL_REQ;
  		SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
  		while (exit_cnt < 5) {
  			val64 = readq(&bar0->spi_control);
  			if (val64 & SPI_CONTROL_NACK) {
  				ret = 1;
  				break;
  			} else if (val64 & SPI_CONTROL_DONE) {
  				*data = readq(&bar0->spi_data);
  				*data &= 0xffffff;
  				ret = 0;
  				break;
  			}
  			msleep(50);
  			exit_cnt++;
  		}
  	}
  	return ret;
  }
  
  /**
   *  write_eeprom - actually writes the relevant part of the data value.
   *  @sp : private member of the device structure, which is a pointer to the
   *       s2io_nic structure.
   *  @off : offset at which the data must be written
   *  @data : The data that is to be written
   *  @cnt : Number of bytes of the data that are actually to be written into
   *  the Eeprom. (max of 3)
   * Description:
   *  Actually writes the relevant part of the data value into the Eeprom
   *  through the I2C bus.
   * Return value:
   *  0 on success, -1 on failure.
   */
  
  static int write_eeprom(struct s2io_nic *sp, int off, u64 data, int cnt)
  {
  	int exit_cnt = 0, ret = -1;
  	u64 val64;
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  
  	if (sp->device_type == XFRAME_I_DEVICE) {
  		val64 = I2C_CONTROL_DEV_ID(S2IO_DEV_ID) |
  			I2C_CONTROL_ADDR(off) |
  			I2C_CONTROL_BYTE_CNT(cnt) |
  			I2C_CONTROL_SET_DATA((u32)data) |
  			I2C_CONTROL_CNTL_START;
  		SPECIAL_REG_WRITE(val64, &bar0->i2c_control, LF);
  
  		while (exit_cnt < 5) {
  			val64 = readq(&bar0->i2c_control);
  			if (I2C_CONTROL_CNTL_END(val64)) {
  				if (!(val64 & I2C_CONTROL_NACK))
  					ret = 0;
  				break;
  			}
  			msleep(50);
  			exit_cnt++;
  		}
  	}
  
  	if (sp->device_type == XFRAME_II_DEVICE) {
  		int write_cnt = (cnt == 8) ? 0 : cnt;
  		writeq(SPI_DATA_WRITE(data, (cnt << 3)), &bar0->spi_data);
  
  		val64 = SPI_CONTROL_KEY(0x9) | SPI_CONTROL_SEL1 |
  			SPI_CONTROL_BYTECNT(write_cnt) |
  			SPI_CONTROL_CMD(0x2) | SPI_CONTROL_ADDR(off);
  		SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
  		val64 |= SPI_CONTROL_REQ;
  		SPECIAL_REG_WRITE(val64, &bar0->spi_control, LF);
  		while (exit_cnt < 5) {
  			val64 = readq(&bar0->spi_control);
  			if (val64 & SPI_CONTROL_NACK) {
  				ret = 1;
  				break;
  			} else if (val64 & SPI_CONTROL_DONE) {
  				ret = 0;
  				break;
  			}
  			msleep(50);
  			exit_cnt++;
  		}
  	}
  	return ret;
  }
  static void s2io_vpd_read(struct s2io_nic *nic)
  {
  	u8 *vpd_data;
  	u8 data;
  	int i = 0, cnt, len, fail = 0;
  	int vpd_addr = 0x80;
  	struct swStat *swstats = &nic->mac_control.stats_info->sw_stat;
  
  	if (nic->device_type == XFRAME_II_DEVICE) {
  		strcpy(nic->product_name, "Xframe II 10GbE network adapter");
  		vpd_addr = 0x80;
  	} else {
  		strcpy(nic->product_name, "Xframe I 10GbE network adapter");
  		vpd_addr = 0x50;
  	}
  	strcpy(nic->serial_num, "NOT AVAILABLE");
  
  	vpd_data = kmalloc(256, GFP_KERNEL);
  	if (!vpd_data) {
  		swstats->mem_alloc_fail_cnt++;
  		return;
  	}
  	swstats->mem_allocated += 256;
  
  	for (i = 0; i < 256; i += 4) {
  		pci_write_config_byte(nic->pdev, (vpd_addr + 2), i);
  		pci_read_config_byte(nic->pdev,  (vpd_addr + 2), &data);
  		pci_write_config_byte(nic->pdev, (vpd_addr + 3), 0);
  		for (cnt = 0; cnt < 5; cnt++) {
  			msleep(2);
  			pci_read_config_byte(nic->pdev, (vpd_addr + 3), &data);
  			if (data == 0x80)
  				break;
  		}
  		if (cnt >= 5) {
  			DBG_PRINT(ERR_DBG, "Read of VPD data failed\n");
  			fail = 1;
  			break;
  		}
  		pci_read_config_dword(nic->pdev,  (vpd_addr + 4),
  				      (u32 *)&vpd_data[i]);
  	}
  
  	if (!fail) {
  		/* read serial number of adapter */
  		for (cnt = 0; cnt < 252; cnt++) {
  			if ((vpd_data[cnt] == 'S') &&
  			    (vpd_data[cnt+1] == 'N')) {
  				len = vpd_data[cnt+2];
  				if (len < min(VPD_STRING_LEN, 256-cnt-2)) {
  					memcpy(nic->serial_num,
  					       &vpd_data[cnt + 3],
  					       len);
  					memset(nic->serial_num+len,
  					       0,
  					       VPD_STRING_LEN-len);
  					break;
  				}
  			}
  		}
  	}
  
  	if ((!fail) && (vpd_data[1] < VPD_STRING_LEN)) {
  		len = vpd_data[1];
  		memcpy(nic->product_name, &vpd_data[3], len);
  		nic->product_name[len] = 0;
  	}
  	kfree(vpd_data);
  	swstats->mem_freed += 256;
  }
  
  /**
   *  s2io_ethtool_geeprom  - reads the value stored in the Eeprom.
   *  @dev: pointer to netdev
   *  @eeprom : pointer to the user level structure provided by ethtool,
   *  containing all relevant information.
   *  @data_buf : user defined value to be written into Eeprom.
   *  Description: Reads the values stored in the Eeprom at given offset
   *  for a given length. Stores these values int the input argument data
   *  buffer 'data_buf' and returns these to the caller (ethtool.)
   *  Return value:
   *  int  0 on success
   */
  
  static int s2io_ethtool_geeprom(struct net_device *dev,
  				struct ethtool_eeprom *eeprom, u8 * data_buf)
  {
  	u32 i, valid;
  	u64 data;
  	struct s2io_nic *sp = netdev_priv(dev);
  
  	eeprom->magic = sp->pdev->vendor | (sp->pdev->device << 16);
  
  	if ((eeprom->offset + eeprom->len) > (XENA_EEPROM_SPACE))
  		eeprom->len = XENA_EEPROM_SPACE - eeprom->offset;
  
  	for (i = 0; i < eeprom->len; i += 4) {
  		if (read_eeprom(sp, (eeprom->offset + i), &data)) {
  			DBG_PRINT(ERR_DBG, "Read of EEPROM failed\n");
  			return -EFAULT;
  		}
  		valid = INV(data);
  		memcpy((data_buf + i), &valid, 4);
  	}
  	return 0;
  }
  
  /**
   *  s2io_ethtool_seeprom - tries to write the user provided value in Eeprom
   *  @dev: pointer to netdev
   *  @eeprom : pointer to the user level structure provided by ethtool,
   *  containing all relevant information.
   *  @data_buf : user defined value to be written into Eeprom.
   *  Description:
   *  Tries to write the user provided value in the Eeprom, at the offset
   *  given by the user.
   *  Return value:
   *  0 on success, -EFAULT on failure.
   */
  
  static int s2io_ethtool_seeprom(struct net_device *dev,
  				struct ethtool_eeprom *eeprom,
  				u8 *data_buf)
  {
  	int len = eeprom->len, cnt = 0;
  	u64 valid = 0, data;
  	struct s2io_nic *sp = netdev_priv(dev);
  
  	if (eeprom->magic != (sp->pdev->vendor | (sp->pdev->device << 16))) {
  		DBG_PRINT(ERR_DBG,
  			  "ETHTOOL_WRITE_EEPROM Err: "
  			  "Magic value is wrong, it is 0x%x should be 0x%x\n",
  			  (sp->pdev->vendor | (sp->pdev->device << 16)),
  			  eeprom->magic);
  		return -EFAULT;
  	}
  
  	while (len) {
  		data = (u32)data_buf[cnt] & 0x000000FF;
  		if (data)
  			valid = (u32)(data << 24);
  		else
  			valid = data;
  
  		if (write_eeprom(sp, (eeprom->offset + cnt), valid, 0)) {
  			DBG_PRINT(ERR_DBG,
  				  "ETHTOOL_WRITE_EEPROM Err: "
  				  "Cannot write into the specified offset\n");
  			return -EFAULT;
  		}
  		cnt++;
  		len--;
  	}
  
  	return 0;
  }
  
  /**
   * s2io_register_test - reads and writes into all clock domains.
   * @sp : private member of the device structure, which is a pointer to the
   * s2io_nic structure.
   * @data : variable that returns the result of each of the test conducted b
   * by the driver.
   * Description:
   * Read and write into all clock domains. The NIC has 3 clock domains,
   * see that registers in all the three regions are accessible.
   * Return value:
   * 0 on success.
   */
  
  static int s2io_register_test(struct s2io_nic *sp, uint64_t *data)
  {
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u64 val64 = 0, exp_val;
  	int fail = 0;
  
  	val64 = readq(&bar0->pif_rd_swapper_fb);
  	if (val64 != 0x123456789abcdefULL) {
  		fail = 1;
  		DBG_PRINT(INFO_DBG, "Read Test level %d fails\n", 1);
  	}
  
  	val64 = readq(&bar0->rmac_pause_cfg);
  	if (val64 != 0xc000ffff00000000ULL) {
  		fail = 1;
  		DBG_PRINT(INFO_DBG, "Read Test level %d fails\n", 2);
  	}
  
  	val64 = readq(&bar0->rx_queue_cfg);
  	if (sp->device_type == XFRAME_II_DEVICE)
  		exp_val = 0x0404040404040404ULL;
  	else
  		exp_val = 0x0808080808080808ULL;
  	if (val64 != exp_val) {
  		fail = 1;
  		DBG_PRINT(INFO_DBG, "Read Test level %d fails\n", 3);
  	}
  
  	val64 = readq(&bar0->xgxs_efifo_cfg);
  	if (val64 != 0x000000001923141EULL) {
  		fail = 1;
  		DBG_PRINT(INFO_DBG, "Read Test level %d fails\n", 4);
  	}
  
  	val64 = 0x5A5A5A5A5A5A5A5AULL;
  	writeq(val64, &bar0->xmsi_data);
  	val64 = readq(&bar0->xmsi_data);
  	if (val64 != 0x5A5A5A5A5A5A5A5AULL) {
  		fail = 1;
  		DBG_PRINT(ERR_DBG, "Write Test level %d fails\n", 1);
  	}
  
  	val64 = 0xA5A5A5A5A5A5A5A5ULL;
  	writeq(val64, &bar0->xmsi_data);
  	val64 = readq(&bar0->xmsi_data);
  	if (val64 != 0xA5A5A5A5A5A5A5A5ULL) {
  		fail = 1;
  		DBG_PRINT(ERR_DBG, "Write Test level %d fails\n", 2);
  	}
  
  	*data = fail;
  	return fail;
  }
  
  /**
   * s2io_eeprom_test - to verify that EEprom in the xena can be programmed.
   * @sp : private member of the device structure, which is a pointer to the
   * s2io_nic structure.
   * @data:variable that returns the result of each of the test conducted by
   * the driver.
   * Description:
   * Verify that EEPROM in the xena can be programmed using I2C_CONTROL
   * register.
   * Return value:
   * 0 on success.
   */
  
  static int s2io_eeprom_test(struct s2io_nic *sp, uint64_t *data)
  {
  	int fail = 0;
  	u64 ret_data, org_4F0, org_7F0;
  	u8 saved_4F0 = 0, saved_7F0 = 0;
  	struct net_device *dev = sp->dev;
  
  	/* Test Write Error at offset 0 */
  	/* Note that SPI interface allows write access to all areas
  	 * of EEPROM. Hence doing all negative testing only for Xframe I.
  	 */
  	if (sp->device_type == XFRAME_I_DEVICE)
  		if (!write_eeprom(sp, 0, 0, 3))
  			fail = 1;
  
  	/* Save current values at offsets 0x4F0 and 0x7F0 */
  	if (!read_eeprom(sp, 0x4F0, &org_4F0))
  		saved_4F0 = 1;
  	if (!read_eeprom(sp, 0x7F0, &org_7F0))
  		saved_7F0 = 1;
  
  	/* Test Write at offset 4f0 */
  	if (write_eeprom(sp, 0x4F0, 0x012345, 3))
  		fail = 1;
  	if (read_eeprom(sp, 0x4F0, &ret_data))
  		fail = 1;
  
  	if (ret_data != 0x012345) {
  		DBG_PRINT(ERR_DBG, "%s: eeprom test error at offset 0x4F0. "
  			  "Data written %llx Data read %llx\n",
  			  dev->name, (unsigned long long)0x12345,
  			  (unsigned long long)ret_data);
  		fail = 1;
  	}
  
  	/* Reset the EEPROM data go FFFF */
  	write_eeprom(sp, 0x4F0, 0xFFFFFF, 3);
  
  	/* Test Write Request Error at offset 0x7c */
  	if (sp->device_type == XFRAME_I_DEVICE)
  		if (!write_eeprom(sp, 0x07C, 0, 3))
  			fail = 1;
  
  	/* Test Write Request at offset 0x7f0 */
  	if (write_eeprom(sp, 0x7F0, 0x012345, 3))
  		fail = 1;
  	if (read_eeprom(sp, 0x7F0, &ret_data))
  		fail = 1;
  
  	if (ret_data != 0x012345) {
  		DBG_PRINT(ERR_DBG, "%s: eeprom test error at offset 0x7F0. "
  			  "Data written %llx Data read %llx\n",
  			  dev->name, (unsigned long long)0x12345,
  			  (unsigned long long)ret_data);
  		fail = 1;
  	}
  
  	/* Reset the EEPROM data go FFFF */
  	write_eeprom(sp, 0x7F0, 0xFFFFFF, 3);
  
  	if (sp->device_type == XFRAME_I_DEVICE) {
  		/* Test Write Error at offset 0x80 */
  		if (!write_eeprom(sp, 0x080, 0, 3))
  			fail = 1;
  
  		/* Test Write Error at offset 0xfc */
  		if (!write_eeprom(sp, 0x0FC, 0, 3))
  			fail = 1;
  
  		/* Test Write Error at offset 0x100 */
  		if (!write_eeprom(sp, 0x100, 0, 3))
  			fail = 1;
  
  		/* Test Write Error at offset 4ec */
  		if (!write_eeprom(sp, 0x4EC, 0, 3))
  			fail = 1;
  	}
  
  	/* Restore values at offsets 0x4F0 and 0x7F0 */
  	if (saved_4F0)
  		write_eeprom(sp, 0x4F0, org_4F0, 3);
  	if (saved_7F0)
  		write_eeprom(sp, 0x7F0, org_7F0, 3);
  
  	*data = fail;
  	return fail;
  }
  
  /**
   * s2io_bist_test - invokes the MemBist test of the card .
   * @sp : private member of the device structure, which is a pointer to the
   * s2io_nic structure.
   * @data:variable that returns the result of each of the test conducted by
   * the driver.
   * Description:
   * This invokes the MemBist test of the card. We give around
   * 2 secs time for the Test to complete. If it's still not complete
   * within this peiod, we consider that the test failed.
   * Return value:
   * 0 on success and -1 on failure.
   */
  
  static int s2io_bist_test(struct s2io_nic *sp, uint64_t *data)
  {
  	u8 bist = 0;
  	int cnt = 0, ret = -1;
  
  	pci_read_config_byte(sp->pdev, PCI_BIST, &bist);
  	bist |= PCI_BIST_START;
  	pci_write_config_word(sp->pdev, PCI_BIST, bist);
  
  	while (cnt < 20) {
  		pci_read_config_byte(sp->pdev, PCI_BIST, &bist);
  		if (!(bist & PCI_BIST_START)) {
  			*data = (bist & PCI_BIST_CODE_MASK);
  			ret = 0;
  			break;
  		}
  		msleep(100);
  		cnt++;
  	}
  
  	return ret;
  }
  
  /**
   * s2io_link_test - verifies the link state of the nic
   * @sp: private member of the device structure, which is a pointer to the
   * s2io_nic structure.
   * @data: variable that returns the result of each of the test conducted by
   * the driver.
   * Description:
   * The function verifies the link state of the NIC and updates the input
   * argument 'data' appropriately.
   * Return value:
   * 0 on success.
   */
  
  static int s2io_link_test(struct s2io_nic *sp, uint64_t *data)
  {
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u64 val64;
  
  	val64 = readq(&bar0->adapter_status);
  	if (!(LINK_IS_UP(val64)))
  		*data = 1;
  	else
  		*data = 0;
  
  	return *data;
  }
  
  /**
   * s2io_rldram_test - offline test for access to the RldRam chip on the NIC
   * @sp: private member of the device structure, which is a pointer to the
   * s2io_nic structure.
   * @data: variable that returns the result of each of the test
   * conducted by the driver.
   * Description:
   *  This is one of the offline test that tests the read and write
   *  access to the RldRam chip on the NIC.
   * Return value:
   *  0 on success.
   */
  
  static int s2io_rldram_test(struct s2io_nic *sp, uint64_t *data)
  {
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	u64 val64;
  	int cnt, iteration = 0, test_fail = 0;
  
  	val64 = readq(&bar0->adapter_control);
  	val64 &= ~ADAPTER_ECC_EN;
  	writeq(val64, &bar0->adapter_control);
  
  	val64 = readq(&bar0->mc_rldram_test_ctrl);
  	val64 |= MC_RLDRAM_TEST_MODE;
  	SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_test_ctrl, LF);
  
  	val64 = readq(&bar0->mc_rldram_mrs);
  	val64 |= MC_RLDRAM_QUEUE_SIZE_ENABLE;
  	SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_mrs, UF);
  
  	val64 |= MC_RLDRAM_MRS_ENABLE;
  	SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_mrs, UF);
  
  	while (iteration < 2) {
  		val64 = 0x55555555aaaa0000ULL;
  		if (iteration == 1)
  			val64 ^= 0xFFFFFFFFFFFF0000ULL;
  		writeq(val64, &bar0->mc_rldram_test_d0);
  
  		val64 = 0xaaaa5a5555550000ULL;
  		if (iteration == 1)
  			val64 ^= 0xFFFFFFFFFFFF0000ULL;
  		writeq(val64, &bar0->mc_rldram_test_d1);
  
  		val64 = 0x55aaaaaaaa5a0000ULL;
  		if (iteration == 1)
  			val64 ^= 0xFFFFFFFFFFFF0000ULL;
  		writeq(val64, &bar0->mc_rldram_test_d2);
  
  		val64 = (u64) (0x0000003ffffe0100ULL);
  		writeq(val64, &bar0->mc_rldram_test_add);
  
  		val64 = MC_RLDRAM_TEST_MODE |
  			MC_RLDRAM_TEST_WRITE |
  			MC_RLDRAM_TEST_GO;
  		SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_test_ctrl, LF);
  
  		for (cnt = 0; cnt < 5; cnt++) {
  			val64 = readq(&bar0->mc_rldram_test_ctrl);
  			if (val64 & MC_RLDRAM_TEST_DONE)
  				break;
  			msleep(200);
  		}
  
  		if (cnt == 5)
  			break;
  
  		val64 = MC_RLDRAM_TEST_MODE | MC_RLDRAM_TEST_GO;
  		SPECIAL_REG_WRITE(val64, &bar0->mc_rldram_test_ctrl, LF);
  
  		for (cnt = 0; cnt < 5; cnt++) {
  			val64 = readq(&bar0->mc_rldram_test_ctrl);
  			if (val64 & MC_RLDRAM_TEST_DONE)
  				break;
  			msleep(500);
  		}
  
  		if (cnt == 5)
  			break;
  
  		val64 = readq(&bar0->mc_rldram_test_ctrl);
  		if (!(val64 & MC_RLDRAM_TEST_PASS))
  			test_fail = 1;
  
  		iteration++;
  	}
  
  	*data = test_fail;
  
  	/* Bring the adapter out of test mode */
  	SPECIAL_REG_WRITE(0, &bar0->mc_rldram_test_ctrl, LF);
  
  	return test_fail;
  }
  
  /**
   *  s2io_ethtool_test - conducts 6 tsets to determine the health of card.
   *  @dev: pointer to netdev
   *  @ethtest : pointer to a ethtool command specific structure that will be
   *  returned to the user.
   *  @data : variable that returns the result of each of the test
   * conducted by the driver.
   * Description:
   *  This function conducts 6 tests ( 4 offline and 2 online) to determine
   *  the health of the card.
   * Return value:
   *  void
   */
  
  static void s2io_ethtool_test(struct net_device *dev,
  			      struct ethtool_test *ethtest,
  			      uint64_t *data)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	int orig_state = netif_running(sp->dev);
  
  	if (ethtest->flags == ETH_TEST_FL_OFFLINE) {
  		/* Offline Tests. */
  		if (orig_state)
  			s2io_close(sp->dev);
  
  		if (s2io_register_test(sp, &data[0]))
  			ethtest->flags |= ETH_TEST_FL_FAILED;
  
  		s2io_reset(sp);
  
  		if (s2io_rldram_test(sp, &data[3]))
  			ethtest->flags |= ETH_TEST_FL_FAILED;
  
  		s2io_reset(sp);
  
  		if (s2io_eeprom_test(sp, &data[1]))
  			ethtest->flags |= ETH_TEST_FL_FAILED;
  
  		if (s2io_bist_test(sp, &data[4]))
  			ethtest->flags |= ETH_TEST_FL_FAILED;
  
  		if (orig_state)
  			s2io_open(sp->dev);
  
  		data[2] = 0;
  	} else {
  		/* Online Tests. */
  		if (!orig_state) {
  			DBG_PRINT(ERR_DBG, "%s: is not up, cannot run test\n",
  				  dev->name);
  			data[0] = -1;
  			data[1] = -1;
  			data[2] = -1;
  			data[3] = -1;
  			data[4] = -1;
  		}
  
  		if (s2io_link_test(sp, &data[2]))
  			ethtest->flags |= ETH_TEST_FL_FAILED;
  
  		data[0] = 0;
  		data[1] = 0;
  		data[3] = 0;
  		data[4] = 0;
  	}
  }
  
  static void s2io_get_ethtool_stats(struct net_device *dev,
  				   struct ethtool_stats *estats,
  				   u64 *tmp_stats)
  {
  	int i = 0, k;
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct stat_block *stats = sp->mac_control.stats_info;
  	struct swStat *swstats = &stats->sw_stat;
  	struct xpakStat *xstats = &stats->xpak_stat;
  
  	s2io_updt_stats(sp);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_frms_oflow) << 32  |
  		le32_to_cpu(stats->tmac_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_data_octets_oflow) << 32 |
  		le32_to_cpu(stats->tmac_data_octets);
  	tmp_stats[i++] = le64_to_cpu(stats->tmac_drop_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_mcst_frms_oflow) << 32 |
  		le32_to_cpu(stats->tmac_mcst_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_bcst_frms_oflow) << 32 |
  		le32_to_cpu(stats->tmac_bcst_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->tmac_pause_ctrl_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_ttl_octets_oflow) << 32 |
  		le32_to_cpu(stats->tmac_ttl_octets);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_ucst_frms_oflow) << 32 |
  		le32_to_cpu(stats->tmac_ucst_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_nucst_frms_oflow) << 32 |
  		le32_to_cpu(stats->tmac_nucst_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_any_err_frms_oflow) << 32 |
  		le32_to_cpu(stats->tmac_any_err_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->tmac_ttl_less_fb_octets);
  	tmp_stats[i++] = le64_to_cpu(stats->tmac_vld_ip_octets);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_vld_ip_oflow) << 32 |
  		le32_to_cpu(stats->tmac_vld_ip);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_drop_ip_oflow) << 32 |
  		le32_to_cpu(stats->tmac_drop_ip);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_icmp_oflow) << 32 |
  		le32_to_cpu(stats->tmac_icmp);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->tmac_rst_tcp_oflow) << 32 |
  		le32_to_cpu(stats->tmac_rst_tcp);
  	tmp_stats[i++] = le64_to_cpu(stats->tmac_tcp);
  	tmp_stats[i++] = (u64)le32_to_cpu(stats->tmac_udp_oflow) << 32 |
  		le32_to_cpu(stats->tmac_udp);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_vld_frms_oflow) << 32 |
  		le32_to_cpu(stats->rmac_vld_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_data_octets_oflow) << 32 |
  		le32_to_cpu(stats->rmac_data_octets);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_fcs_err_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_drop_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_vld_mcst_frms_oflow) << 32 |
  		le32_to_cpu(stats->rmac_vld_mcst_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_vld_bcst_frms_oflow) << 32 |
  		le32_to_cpu(stats->rmac_vld_bcst_frms);
  	tmp_stats[i++] = le32_to_cpu(stats->rmac_in_rng_len_err_frms);
  	tmp_stats[i++] = le32_to_cpu(stats->rmac_out_rng_len_err_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_long_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_pause_ctrl_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_unsup_ctrl_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_ttl_octets_oflow) << 32 |
  		le32_to_cpu(stats->rmac_ttl_octets);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_accepted_ucst_frms_oflow) << 32
  		| le32_to_cpu(stats->rmac_accepted_ucst_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_accepted_nucst_frms_oflow)
  		<< 32 | le32_to_cpu(stats->rmac_accepted_nucst_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_discarded_frms_oflow) << 32 |
  		le32_to_cpu(stats->rmac_discarded_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_drop_events_oflow)
  		<< 32 | le32_to_cpu(stats->rmac_drop_events);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_ttl_less_fb_octets);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_ttl_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_usized_frms_oflow) << 32 |
  		le32_to_cpu(stats->rmac_usized_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_osized_frms_oflow) << 32 |
  		le32_to_cpu(stats->rmac_osized_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_frag_frms_oflow) << 32 |
  		le32_to_cpu(stats->rmac_frag_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_jabber_frms_oflow) << 32 |
  		le32_to_cpu(stats->rmac_jabber_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_ttl_64_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_ttl_65_127_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_ttl_128_255_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_ttl_256_511_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_ttl_512_1023_frms);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_ttl_1024_1518_frms);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_ip_oflow) << 32 |
  		le32_to_cpu(stats->rmac_ip);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_ip_octets);
  	tmp_stats[i++] = le32_to_cpu(stats->rmac_hdr_err_ip);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_drop_ip_oflow) << 32 |
  		le32_to_cpu(stats->rmac_drop_ip);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_icmp_oflow) << 32 |
  		le32_to_cpu(stats->rmac_icmp);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_tcp);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_udp_oflow) << 32 |
  		le32_to_cpu(stats->rmac_udp);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_err_drp_udp_oflow) << 32 |
  		le32_to_cpu(stats->rmac_err_drp_udp);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_xgmii_err_sym);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_frms_q0);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_frms_q1);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_frms_q2);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_frms_q3);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_frms_q4);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_frms_q5);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_frms_q6);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_frms_q7);
  	tmp_stats[i++] = le16_to_cpu(stats->rmac_full_q0);
  	tmp_stats[i++] = le16_to_cpu(stats->rmac_full_q1);
  	tmp_stats[i++] = le16_to_cpu(stats->rmac_full_q2);
  	tmp_stats[i++] = le16_to_cpu(stats->rmac_full_q3);
  	tmp_stats[i++] = le16_to_cpu(stats->rmac_full_q4);
  	tmp_stats[i++] = le16_to_cpu(stats->rmac_full_q5);
  	tmp_stats[i++] = le16_to_cpu(stats->rmac_full_q6);
  	tmp_stats[i++] = le16_to_cpu(stats->rmac_full_q7);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_pause_cnt_oflow) << 32 |
  		le32_to_cpu(stats->rmac_pause_cnt);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_xgmii_data_err_cnt);
  	tmp_stats[i++] = le64_to_cpu(stats->rmac_xgmii_ctrl_err_cnt);
  	tmp_stats[i++] =
  		(u64)le32_to_cpu(stats->rmac_accepted_ip_oflow) << 32 |
  		le32_to_cpu(stats->rmac_accepted_ip);
  	tmp_stats[i++] = le32_to_cpu(stats->rmac_err_tcp);
  	tmp_stats[i++] = le32_to_cpu(stats->rd_req_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->new_rd_req_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->new_rd_req_rtry_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->rd_rtry_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->wr_rtry_rd_ack_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->wr_req_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->new_wr_req_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->new_wr_req_rtry_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->wr_rtry_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->wr_disc_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->rd_rtry_wr_ack_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->txp_wr_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->txd_rd_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->txd_wr_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->rxd_rd_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->rxd_wr_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->txf_rd_cnt);
  	tmp_stats[i++] = le32_to_cpu(stats->rxf_wr_cnt);
  
  	/* Enhanced statistics exist only for Hercules */
  	if (sp->device_type == XFRAME_II_DEVICE) {
  		tmp_stats[i++] =
  			le64_to_cpu(stats->rmac_ttl_1519_4095_frms);
  		tmp_stats[i++] =
  			le64_to_cpu(stats->rmac_ttl_4096_8191_frms);
  		tmp_stats[i++] =
  			le64_to_cpu(stats->rmac_ttl_8192_max_frms);
  		tmp_stats[i++] = le64_to_cpu(stats->rmac_ttl_gt_max_frms);
  		tmp_stats[i++] = le64_to_cpu(stats->rmac_osized_alt_frms);
  		tmp_stats[i++] = le64_to_cpu(stats->rmac_jabber_alt_frms);
  		tmp_stats[i++] = le64_to_cpu(stats->rmac_gt_max_alt_frms);
  		tmp_stats[i++] = le64_to_cpu(stats->rmac_vlan_frms);
  		tmp_stats[i++] = le32_to_cpu(stats->rmac_len_discard);
  		tmp_stats[i++] = le32_to_cpu(stats->rmac_fcs_discard);
  		tmp_stats[i++] = le32_to_cpu(stats->rmac_pf_discard);
  		tmp_stats[i++] = le32_to_cpu(stats->rmac_da_discard);
  		tmp_stats[i++] = le32_to_cpu(stats->rmac_red_discard);
  		tmp_stats[i++] = le32_to_cpu(stats->rmac_rts_discard);
  		tmp_stats[i++] = le32_to_cpu(stats->rmac_ingm_full_discard);
  		tmp_stats[i++] = le32_to_cpu(stats->link_fault_cnt);
  	}
  
  	tmp_stats[i++] = 0;
  	tmp_stats[i++] = swstats->single_ecc_errs;
  	tmp_stats[i++] = swstats->double_ecc_errs;
  	tmp_stats[i++] = swstats->parity_err_cnt;
  	tmp_stats[i++] = swstats->serious_err_cnt;
  	tmp_stats[i++] = swstats->soft_reset_cnt;
  	tmp_stats[i++] = swstats->fifo_full_cnt;
  	for (k = 0; k < MAX_RX_RINGS; k++)
  		tmp_stats[i++] = swstats->ring_full_cnt[k];
  	tmp_stats[i++] = xstats->alarm_transceiver_temp_high;
  	tmp_stats[i++] = xstats->alarm_transceiver_temp_low;
  	tmp_stats[i++] = xstats->alarm_laser_bias_current_high;
  	tmp_stats[i++] = xstats->alarm_laser_bias_current_low;
  	tmp_stats[i++] = xstats->alarm_laser_output_power_high;
  	tmp_stats[i++] = xstats->alarm_laser_output_power_low;
  	tmp_stats[i++] = xstats->warn_transceiver_temp_high;
  	tmp_stats[i++] = xstats->warn_transceiver_temp_low;
  	tmp_stats[i++] = xstats->warn_laser_bias_current_high;
  	tmp_stats[i++] = xstats->warn_laser_bias_current_low;
  	tmp_stats[i++] = xstats->warn_laser_output_power_high;
  	tmp_stats[i++] = xstats->warn_laser_output_power_low;
  	tmp_stats[i++] = swstats->clubbed_frms_cnt;
  	tmp_stats[i++] = swstats->sending_both;
  	tmp_stats[i++] = swstats->outof_sequence_pkts;
  	tmp_stats[i++] = swstats->flush_max_pkts;
  	if (swstats->num_aggregations) {
  		u64 tmp = swstats->sum_avg_pkts_aggregated;
  		int count = 0;
  		/*
  		 * Since 64-bit divide does not work on all platforms,
  		 * do repeated subtraction.
  		 */
  		while (tmp >= swstats->num_aggregations) {
  			tmp -= swstats->num_aggregations;
  			count++;
  		}
  		tmp_stats[i++] = count;
  	} else
  		tmp_stats[i++] = 0;
  	tmp_stats[i++] = swstats->mem_alloc_fail_cnt;
  	tmp_stats[i++] = swstats->pci_map_fail_cnt;
  	tmp_stats[i++] = swstats->watchdog_timer_cnt;
  	tmp_stats[i++] = swstats->mem_allocated;
  	tmp_stats[i++] = swstats->mem_freed;
  	tmp_stats[i++] = swstats->link_up_cnt;
  	tmp_stats[i++] = swstats->link_down_cnt;
  	tmp_stats[i++] = swstats->link_up_time;
  	tmp_stats[i++] = swstats->link_down_time;
  
  	tmp_stats[i++] = swstats->tx_buf_abort_cnt;
  	tmp_stats[i++] = swstats->tx_desc_abort_cnt;
  	tmp_stats[i++] = swstats->tx_parity_err_cnt;
  	tmp_stats[i++] = swstats->tx_link_loss_cnt;
  	tmp_stats[i++] = swstats->tx_list_proc_err_cnt;
  
  	tmp_stats[i++] = swstats->rx_parity_err_cnt;
  	tmp_stats[i++] = swstats->rx_abort_cnt;
  	tmp_stats[i++] = swstats->rx_parity_abort_cnt;
  	tmp_stats[i++] = swstats->rx_rda_fail_cnt;
  	tmp_stats[i++] = swstats->rx_unkn_prot_cnt;
  	tmp_stats[i++] = swstats->rx_fcs_err_cnt;
  	tmp_stats[i++] = swstats->rx_buf_size_err_cnt;
  	tmp_stats[i++] = swstats->rx_rxd_corrupt_cnt;
  	tmp_stats[i++] = swstats->rx_unkn_err_cnt;
  	tmp_stats[i++] = swstats->tda_err_cnt;
  	tmp_stats[i++] = swstats->pfc_err_cnt;
  	tmp_stats[i++] = swstats->pcc_err_cnt;
  	tmp_stats[i++] = swstats->tti_err_cnt;
  	tmp_stats[i++] = swstats->tpa_err_cnt;
  	tmp_stats[i++] = swstats->sm_err_cnt;
  	tmp_stats[i++] = swstats->lso_err_cnt;
  	tmp_stats[i++] = swstats->mac_tmac_err_cnt;
  	tmp_stats[i++] = swstats->mac_rmac_err_cnt;
  	tmp_stats[i++] = swstats->xgxs_txgxs_err_cnt;
  	tmp_stats[i++] = swstats->xgxs_rxgxs_err_cnt;
  	tmp_stats[i++] = swstats->rc_err_cnt;
  	tmp_stats[i++] = swstats->prc_pcix_err_cnt;
  	tmp_stats[i++] = swstats->rpa_err_cnt;
  	tmp_stats[i++] = swstats->rda_err_cnt;
  	tmp_stats[i++] = swstats->rti_err_cnt;
  	tmp_stats[i++] = swstats->mc_err_cnt;
  }
  
  static int s2io_ethtool_get_regs_len(struct net_device *dev)
  {
  	return XENA_REG_SPACE;
  }
  
  
  static int s2io_get_eeprom_len(struct net_device *dev)
  {
  	return XENA_EEPROM_SPACE;
  }
  
  static int s2io_get_sset_count(struct net_device *dev, int sset)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  
  	switch (sset) {
  	case ETH_SS_TEST:
  		return S2IO_TEST_LEN;
  	case ETH_SS_STATS:
  		switch (sp->device_type) {
  		case XFRAME_I_DEVICE:
  			return XFRAME_I_STAT_LEN;
  		case XFRAME_II_DEVICE:
  			return XFRAME_II_STAT_LEN;
  		default:
  			return 0;
  		}
  	default:
  		return -EOPNOTSUPP;
  	}
  }
  
  static void s2io_ethtool_get_strings(struct net_device *dev,
  				     u32 stringset, u8 *data)
  {
  	int stat_size = 0;
  	struct s2io_nic *sp = netdev_priv(dev);
  
  	switch (stringset) {
  	case ETH_SS_TEST:
  		memcpy(data, s2io_gstrings, S2IO_STRINGS_LEN);
  		break;
  	case ETH_SS_STATS:
  		stat_size = sizeof(ethtool_xena_stats_keys);
  		memcpy(data, &ethtool_xena_stats_keys, stat_size);
  		if (sp->device_type == XFRAME_II_DEVICE) {
  			memcpy(data + stat_size,
  			       &ethtool_enhanced_stats_keys,
  			       sizeof(ethtool_enhanced_stats_keys));
  			stat_size += sizeof(ethtool_enhanced_stats_keys);
  		}
  
  		memcpy(data + stat_size, &ethtool_driver_stats_keys,
  		       sizeof(ethtool_driver_stats_keys));
  	}
  }
  
  static int s2io_set_features(struct net_device *dev, netdev_features_t features)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	netdev_features_t changed = (features ^ dev->features) & NETIF_F_LRO;
  
  	if (changed && netif_running(dev)) {
  		int rc;
  
  		s2io_stop_all_tx_queue(sp);
  		s2io_card_down(sp);
  		dev->features = features;
  		rc = s2io_card_up(sp);
  		if (rc)
  			s2io_reset(sp);
  		else
  			s2io_start_all_tx_queue(sp);
  
  		return rc ? rc : 1;
  	}
  
  	return 0;
  }
  
  static const struct ethtool_ops netdev_ethtool_ops = {
  	.get_drvinfo = s2io_ethtool_gdrvinfo,
  	.get_regs_len = s2io_ethtool_get_regs_len,
  	.get_regs = s2io_ethtool_gregs,
  	.get_link = ethtool_op_get_link,
  	.get_eeprom_len = s2io_get_eeprom_len,
  	.get_eeprom = s2io_ethtool_geeprom,
  	.set_eeprom = s2io_ethtool_seeprom,
  	.get_ringparam = s2io_ethtool_gringparam,
  	.get_pauseparam = s2io_ethtool_getpause_data,
  	.set_pauseparam = s2io_ethtool_setpause_data,
  	.self_test = s2io_ethtool_test,
  	.get_strings = s2io_ethtool_get_strings,
  	.set_phys_id = s2io_ethtool_set_led,
  	.get_ethtool_stats = s2io_get_ethtool_stats,
  	.get_sset_count = s2io_get_sset_count,
  	.get_link_ksettings = s2io_ethtool_get_link_ksettings,
  	.set_link_ksettings = s2io_ethtool_set_link_ksettings,
  };
  
  /**
   *  s2io_ioctl - Entry point for the Ioctl
   *  @dev :  Device pointer.
   *  @rq :  An IOCTL specefic structure, that can contain a pointer to
   *  a proprietary structure used to pass information to the driver.
   *  @cmd :  This is used to distinguish between the different commands that
   *  can be passed to the IOCTL functions.
   *  Description:
   *  Currently there are no special functionality supported in IOCTL, hence
   *  function always return EOPNOTSUPPORTED
   */
  
  static int s2io_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  {
  	return -EOPNOTSUPP;
  }
  
  /**
   *  s2io_change_mtu - entry point to change MTU size for the device.
   *   @dev : device pointer.
   *   @new_mtu : the new MTU size for the device.
   *   Description: A driver entry point to change MTU size for the device.
   *   Before changing the MTU the device must be stopped.
   *  Return value:
   *   0 on success and an appropriate (-)ve integer as defined in errno.h
   *   file on failure.
   */
  
  static int s2io_change_mtu(struct net_device *dev, int new_mtu)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	int ret = 0;
  
  	dev->mtu = new_mtu;
  	if (netif_running(dev)) {
  		s2io_stop_all_tx_queue(sp);
  		s2io_card_down(sp);
  		ret = s2io_card_up(sp);
  		if (ret) {
  			DBG_PRINT(ERR_DBG, "%s: Device bring up failed\n",
  				  __func__);
  			return ret;
  		}
  		s2io_wake_all_tx_queue(sp);
  	} else { /* Device is down */
  		struct XENA_dev_config __iomem *bar0 = sp->bar0;
  		u64 val64 = new_mtu;
  
  		writeq(vBIT(val64, 2, 14), &bar0->rmac_max_pyld_len);
  	}
  
  	return ret;
  }
  
  /**
   * s2io_set_link - Set the LInk status
   * @work: work struct containing a pointer to device private structure
   * Description: Sets the link status for the adapter
   */
  
  static void s2io_set_link(struct work_struct *work)
  {
  	struct s2io_nic *nic = container_of(work, struct s2io_nic,
  					    set_link_task);
  	struct net_device *dev = nic->dev;
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	register u64 val64;
  	u16 subid;
  
  	rtnl_lock();
  
  	if (!netif_running(dev))
  		goto out_unlock;
  
  	if (test_and_set_bit(__S2IO_STATE_LINK_TASK, &(nic->state))) {
  		/* The card is being reset, no point doing anything */
  		goto out_unlock;
  	}
  
  	subid = nic->pdev->subsystem_device;
  	if (s2io_link_fault_indication(nic) == MAC_RMAC_ERR_TIMER) {
  		/*
  		 * Allow a small delay for the NICs self initiated
  		 * cleanup to complete.
  		 */
  		msleep(100);
  	}
  
  	val64 = readq(&bar0->adapter_status);
  	if (LINK_IS_UP(val64)) {
  		if (!(readq(&bar0->adapter_control) & ADAPTER_CNTL_EN)) {
  			if (verify_xena_quiescence(nic)) {
  				val64 = readq(&bar0->adapter_control);
  				val64 |= ADAPTER_CNTL_EN;
  				writeq(val64, &bar0->adapter_control);
  				if (CARDS_WITH_FAULTY_LINK_INDICATORS(
  					    nic->device_type, subid)) {
  					val64 = readq(&bar0->gpio_control);
  					val64 |= GPIO_CTRL_GPIO_0;
  					writeq(val64, &bar0->gpio_control);
  					val64 = readq(&bar0->gpio_control);
  				} else {
  					val64 |= ADAPTER_LED_ON;
  					writeq(val64, &bar0->adapter_control);
  				}
  				nic->device_enabled_once = true;
  			} else {
  				DBG_PRINT(ERR_DBG,
  					  "%s: Error: device is not Quiescent\n",
  					  dev->name);
  				s2io_stop_all_tx_queue(nic);
  			}
  		}
  		val64 = readq(&bar0->adapter_control);
  		val64 |= ADAPTER_LED_ON;
  		writeq(val64, &bar0->adapter_control);
  		s2io_link(nic, LINK_UP);
  	} else {
  		if (CARDS_WITH_FAULTY_LINK_INDICATORS(nic->device_type,
  						      subid)) {
  			val64 = readq(&bar0->gpio_control);
  			val64 &= ~GPIO_CTRL_GPIO_0;
  			writeq(val64, &bar0->gpio_control);
  			val64 = readq(&bar0->gpio_control);
  		}
  		/* turn off LED */
  		val64 = readq(&bar0->adapter_control);
  		val64 = val64 & (~ADAPTER_LED_ON);
  		writeq(val64, &bar0->adapter_control);
  		s2io_link(nic, LINK_DOWN);
  	}
  	clear_bit(__S2IO_STATE_LINK_TASK, &(nic->state));
  
  out_unlock:
  	rtnl_unlock();
  }
  
  static int set_rxd_buffer_pointer(struct s2io_nic *sp, struct RxD_t *rxdp,
  				  struct buffAdd *ba,
  				  struct sk_buff **skb, u64 *temp0, u64 *temp1,
  				  u64 *temp2, int size)
  {
  	struct net_device *dev = sp->dev;
  	struct swStat *stats = &sp->mac_control.stats_info->sw_stat;
  
  	if ((sp->rxd_mode == RXD_MODE_1) && (rxdp->Host_Control == 0)) {
  		struct RxD1 *rxdp1 = (struct RxD1 *)rxdp;
  		/* allocate skb */
  		if (*skb) {
  			DBG_PRINT(INFO_DBG, "SKB is not NULL\n");
  			/*
  			 * As Rx frame are not going to be processed,
  			 * using same mapped address for the Rxd
  			 * buffer pointer
  			 */
  			rxdp1->Buffer0_ptr = *temp0;
  		} else {
  			*skb = netdev_alloc_skb(dev, size);
  			if (!(*skb)) {
  				DBG_PRINT(INFO_DBG,
  					  "%s: Out of memory to allocate %s\n",
  					  dev->name, "1 buf mode SKBs");
  				stats->mem_alloc_fail_cnt++;
  				return -ENOMEM ;
  			}
  			stats->mem_allocated += (*skb)->truesize;
  			/* storing the mapped addr in a temp variable
  			 * such it will be used for next rxd whose
  			 * Host Control is NULL
  			 */
  			rxdp1->Buffer0_ptr = *temp0 =
  				dma_map_single(&sp->pdev->dev, (*skb)->data,
  					       size - NET_IP_ALIGN,
  					       DMA_FROM_DEVICE);
  			if (dma_mapping_error(&sp->pdev->dev, rxdp1->Buffer0_ptr))
  				goto memalloc_failed;
  			rxdp->Host_Control = (unsigned long) (*skb);
  		}
  	} else if ((sp->rxd_mode == RXD_MODE_3B) && (rxdp->Host_Control == 0)) {
  		struct RxD3 *rxdp3 = (struct RxD3 *)rxdp;
  		/* Two buffer Mode */
  		if (*skb) {
  			rxdp3->Buffer2_ptr = *temp2;
  			rxdp3->Buffer0_ptr = *temp0;
  			rxdp3->Buffer1_ptr = *temp1;
  		} else {
  			*skb = netdev_alloc_skb(dev, size);
  			if (!(*skb)) {
  				DBG_PRINT(INFO_DBG,
  					  "%s: Out of memory to allocate %s\n",
  					  dev->name,
  					  "2 buf mode SKBs");
  				stats->mem_alloc_fail_cnt++;
  				return -ENOMEM;
  			}
  			stats->mem_allocated += (*skb)->truesize;
  			rxdp3->Buffer2_ptr = *temp2 =
  				dma_map_single(&sp->pdev->dev, (*skb)->data,
  					       dev->mtu + 4, DMA_FROM_DEVICE);
  			if (dma_mapping_error(&sp->pdev->dev, rxdp3->Buffer2_ptr))
  				goto memalloc_failed;
  			rxdp3->Buffer0_ptr = *temp0 =
  				dma_map_single(&sp->pdev->dev, ba->ba_0,
  					       BUF0_LEN, DMA_FROM_DEVICE);
  			if (dma_mapping_error(&sp->pdev->dev, rxdp3->Buffer0_ptr)) {
  				dma_unmap_single(&sp->pdev->dev,
  						 (dma_addr_t)rxdp3->Buffer2_ptr,
  						 dev->mtu + 4,
  						 DMA_FROM_DEVICE);
  				goto memalloc_failed;
  			}
  			rxdp->Host_Control = (unsigned long) (*skb);
  
  			/* Buffer-1 will be dummy buffer not used */
  			rxdp3->Buffer1_ptr = *temp1 =
  				dma_map_single(&sp->pdev->dev, ba->ba_1,
  					       BUF1_LEN, DMA_FROM_DEVICE);
  			if (dma_mapping_error(&sp->pdev->dev, rxdp3->Buffer1_ptr)) {
  				dma_unmap_single(&sp->pdev->dev,
  						 (dma_addr_t)rxdp3->Buffer0_ptr,
  						 BUF0_LEN, DMA_FROM_DEVICE);
  				dma_unmap_single(&sp->pdev->dev,
  						 (dma_addr_t)rxdp3->Buffer2_ptr,
  						 dev->mtu + 4,
  						 DMA_FROM_DEVICE);
  				goto memalloc_failed;
  			}
  		}
  	}
  	return 0;
  
  memalloc_failed:
  	stats->pci_map_fail_cnt++;
  	stats->mem_freed += (*skb)->truesize;
  	dev_kfree_skb(*skb);
  	return -ENOMEM;
  }
  
  static void set_rxd_buffer_size(struct s2io_nic *sp, struct RxD_t *rxdp,
  				int size)
  {
  	struct net_device *dev = sp->dev;
  	if (sp->rxd_mode == RXD_MODE_1) {
  		rxdp->Control_2 = SET_BUFFER0_SIZE_1(size - NET_IP_ALIGN);
  	} else if (sp->rxd_mode == RXD_MODE_3B) {
  		rxdp->Control_2 = SET_BUFFER0_SIZE_3(BUF0_LEN);
  		rxdp->Control_2 |= SET_BUFFER1_SIZE_3(1);
  		rxdp->Control_2 |= SET_BUFFER2_SIZE_3(dev->mtu + 4);
  	}
  }
  
  static  int rxd_owner_bit_reset(struct s2io_nic *sp)
  {
  	int i, j, k, blk_cnt = 0, size;
  	struct config_param *config = &sp->config;
  	struct mac_info *mac_control = &sp->mac_control;
  	struct net_device *dev = sp->dev;
  	struct RxD_t *rxdp = NULL;
  	struct sk_buff *skb = NULL;
  	struct buffAdd *ba = NULL;
  	u64 temp0_64 = 0, temp1_64 = 0, temp2_64 = 0;
  
  	/* Calculate the size based on ring mode */
  	size = dev->mtu + HEADER_ETHERNET_II_802_3_SIZE +
  		HEADER_802_2_SIZE + HEADER_SNAP_SIZE;
  	if (sp->rxd_mode == RXD_MODE_1)
  		size += NET_IP_ALIGN;
  	else if (sp->rxd_mode == RXD_MODE_3B)
  		size = dev->mtu + ALIGN_SIZE + BUF0_LEN + 4;
  
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct rx_ring_config *rx_cfg = &config->rx_cfg[i];
  		struct ring_info *ring = &mac_control->rings[i];
  
  		blk_cnt = rx_cfg->num_rxd / (rxd_count[sp->rxd_mode] + 1);
  
  		for (j = 0; j < blk_cnt; j++) {
  			for (k = 0; k < rxd_count[sp->rxd_mode]; k++) {
  				rxdp = ring->rx_blocks[j].rxds[k].virt_addr;
  				if (sp->rxd_mode == RXD_MODE_3B)
  					ba = &ring->ba[j][k];
  				if (set_rxd_buffer_pointer(sp, rxdp, ba, &skb,
  							   &temp0_64,
  							   &temp1_64,
  							   &temp2_64,
  							   size) == -ENOMEM) {
  					return 0;
  				}
  
  				set_rxd_buffer_size(sp, rxdp, size);
  				dma_wmb();
  				/* flip the Ownership bit to Hardware */
  				rxdp->Control_1 |= RXD_OWN_XENA;
  			}
  		}
  	}
  	return 0;
  
  }
  
  static int s2io_add_isr(struct s2io_nic *sp)
  {
  	int ret = 0;
  	struct net_device *dev = sp->dev;
  	int err = 0;
  
  	if (sp->config.intr_type == MSI_X)
  		ret = s2io_enable_msi_x(sp);
  	if (ret) {
  		DBG_PRINT(ERR_DBG, "%s: Defaulting to INTA\n", dev->name);
  		sp->config.intr_type = INTA;
  	}
  
  	/*
  	 * Store the values of the MSIX table in
  	 * the struct s2io_nic structure
  	 */
  	store_xmsi_data(sp);
  
  	/* After proper initialization of H/W, register ISR */
  	if (sp->config.intr_type == MSI_X) {
  		int i, msix_rx_cnt = 0;
  
  		for (i = 0; i < sp->num_entries; i++) {
  			if (sp->s2io_entries[i].in_use == MSIX_FLG) {
  				if (sp->s2io_entries[i].type ==
  				    MSIX_RING_TYPE) {
  					snprintf(sp->desc[i],
  						sizeof(sp->desc[i]),
  						"%s:MSI-X-%d-RX",
  						dev->name, i);
  					err = request_irq(sp->entries[i].vector,
  							  s2io_msix_ring_handle,
  							  0,
  							  sp->desc[i],
  							  sp->s2io_entries[i].arg);
  				} else if (sp->s2io_entries[i].type ==
  					   MSIX_ALARM_TYPE) {
  					snprintf(sp->desc[i],
  						sizeof(sp->desc[i]),
  						"%s:MSI-X-%d-TX",
  						dev->name, i);
  					err = request_irq(sp->entries[i].vector,
  							  s2io_msix_fifo_handle,
  							  0,
  							  sp->desc[i],
  							  sp->s2io_entries[i].arg);
  
  				}
  				/* if either data or addr is zero print it. */
  				if (!(sp->msix_info[i].addr &&
  				      sp->msix_info[i].data)) {
  					DBG_PRINT(ERR_DBG,
  						  "%s @Addr:0x%llx Data:0x%llx\n",
  						  sp->desc[i],
  						  (unsigned long long)
  						  sp->msix_info[i].addr,
  						  (unsigned long long)
  						  ntohl(sp->msix_info[i].data));
  				} else
  					msix_rx_cnt++;
  				if (err) {
  					remove_msix_isr(sp);
  
  					DBG_PRINT(ERR_DBG,
  						  "%s:MSI-X-%d registration "
  						  "failed\n", dev->name, i);
  
  					DBG_PRINT(ERR_DBG,
  						  "%s: Defaulting to INTA\n",
  						  dev->name);
  					sp->config.intr_type = INTA;
  					break;
  				}
  				sp->s2io_entries[i].in_use =
  					MSIX_REGISTERED_SUCCESS;
  			}
  		}
  		if (!err) {
  			pr_info("MSI-X-RX %d entries enabled\n", --msix_rx_cnt);
  			DBG_PRINT(INFO_DBG,
  				  "MSI-X-TX entries enabled through alarm vector\n");
  		}
  	}
  	if (sp->config.intr_type == INTA) {
  		err = request_irq(sp->pdev->irq, s2io_isr, IRQF_SHARED,
  				  sp->name, dev);
  		if (err) {
  			DBG_PRINT(ERR_DBG, "%s: ISR registration failed\n",
  				  dev->name);
  			return -1;
  		}
  	}
  	return 0;
  }
  
  static void s2io_rem_isr(struct s2io_nic *sp)
  {
  	if (sp->config.intr_type == MSI_X)
  		remove_msix_isr(sp);
  	else
  		remove_inta_isr(sp);
  }
  
  static void do_s2io_card_down(struct s2io_nic *sp, int do_io)
  {
  	int cnt = 0;
  	struct XENA_dev_config __iomem *bar0 = sp->bar0;
  	register u64 val64 = 0;
  	struct config_param *config;
  	config = &sp->config;
  
  	if (!is_s2io_card_up(sp))
  		return;
  
  	del_timer_sync(&sp->alarm_timer);
  	/* If s2io_set_link task is executing, wait till it completes. */
  	while (test_and_set_bit(__S2IO_STATE_LINK_TASK, &(sp->state)))
  		msleep(50);
  	clear_bit(__S2IO_STATE_CARD_UP, &sp->state);
  
  	/* Disable napi */
  	if (sp->config.napi) {
  		int off = 0;
  		if (config->intr_type ==  MSI_X) {
  			for (; off < sp->config.rx_ring_num; off++)
  				napi_disable(&sp->mac_control.rings[off].napi);
  		}
  		else
  			napi_disable(&sp->napi);
  	}
  
  	/* disable Tx and Rx traffic on the NIC */
  	if (do_io)
  		stop_nic(sp);
  
  	s2io_rem_isr(sp);
  
  	/* stop the tx queue, indicate link down */
  	s2io_link(sp, LINK_DOWN);
  
  	/* Check if the device is Quiescent and then Reset the NIC */
  	while (do_io) {
  		/* As per the HW requirement we need to replenish the
  		 * receive buffer to avoid the ring bump. Since there is
  		 * no intention of processing the Rx frame at this pointwe are
  		 * just setting the ownership bit of rxd in Each Rx
  		 * ring to HW and set the appropriate buffer size
  		 * based on the ring mode
  		 */
  		rxd_owner_bit_reset(sp);
  
  		val64 = readq(&bar0->adapter_status);
  		if (verify_xena_quiescence(sp)) {
  			if (verify_pcc_quiescent(sp, sp->device_enabled_once))
  				break;
  		}
  
  		msleep(50);
  		cnt++;
  		if (cnt == 10) {
  			DBG_PRINT(ERR_DBG, "Device not Quiescent - "
  				  "adapter status reads 0x%llx\n",
  				  (unsigned long long)val64);
  			break;
  		}
  	}
  	if (do_io)
  		s2io_reset(sp);
  
  	/* Free all Tx buffers */
  	free_tx_buffers(sp);
  
  	/* Free all Rx buffers */
  	free_rx_buffers(sp);
  
  	clear_bit(__S2IO_STATE_LINK_TASK, &(sp->state));
  }
  
  static void s2io_card_down(struct s2io_nic *sp)
  {
  	do_s2io_card_down(sp, 1);
  }
  
  static int s2io_card_up(struct s2io_nic *sp)
  {
  	int i, ret = 0;
  	struct config_param *config;
  	struct mac_info *mac_control;
  	struct net_device *dev = sp->dev;
  	u16 interruptible;
  
  	/* Initialize the H/W I/O registers */
  	ret = init_nic(sp);
  	if (ret != 0) {
  		DBG_PRINT(ERR_DBG, "%s: H/W initialization failed\n",
  			  dev->name);
  		if (ret != -EIO)
  			s2io_reset(sp);
  		return ret;
  	}
  
  	/*
  	 * Initializing the Rx buffers. For now we are considering only 1
  	 * Rx ring and initializing buffers into 30 Rx blocks
  	 */
  	config = &sp->config;
  	mac_control = &sp->mac_control;
  
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct ring_info *ring = &mac_control->rings[i];
  
  		ring->mtu = dev->mtu;
  		ring->lro = !!(dev->features & NETIF_F_LRO);
  		ret = fill_rx_buffers(sp, ring, 1);
  		if (ret) {
  			DBG_PRINT(ERR_DBG, "%s: Out of memory in Open\n",
  				  dev->name);
  			s2io_reset(sp);
  			free_rx_buffers(sp);
  			return -ENOMEM;
  		}
  		DBG_PRINT(INFO_DBG, "Buf in ring:%d is %d:\n", i,
  			  ring->rx_bufs_left);
  	}
  
  	/* Initialise napi */
  	if (config->napi) {
  		if (config->intr_type ==  MSI_X) {
  			for (i = 0; i < sp->config.rx_ring_num; i++)
  				napi_enable(&sp->mac_control.rings[i].napi);
  		} else {
  			napi_enable(&sp->napi);
  		}
  	}
  
  	/* Maintain the state prior to the open */
  	if (sp->promisc_flg)
  		sp->promisc_flg = 0;
  	if (sp->m_cast_flg) {
  		sp->m_cast_flg = 0;
  		sp->all_multi_pos = 0;
  	}
  
  	/* Setting its receive mode */
  	s2io_set_multicast(dev, true);
  
  	if (dev->features & NETIF_F_LRO) {
  		/* Initialize max aggregatable pkts per session based on MTU */
  		sp->lro_max_aggr_per_sess = ((1<<16) - 1) / dev->mtu;
  		/* Check if we can use (if specified) user provided value */
  		if (lro_max_pkts < sp->lro_max_aggr_per_sess)
  			sp->lro_max_aggr_per_sess = lro_max_pkts;
  	}
  
  	/* Enable Rx Traffic and interrupts on the NIC */
  	if (start_nic(sp)) {
  		DBG_PRINT(ERR_DBG, "%s: Starting NIC failed\n", dev->name);
  		s2io_reset(sp);
  		free_rx_buffers(sp);
  		return -ENODEV;
  	}
  
  	/* Add interrupt service routine */
  	if (s2io_add_isr(sp) != 0) {
  		if (sp->config.intr_type == MSI_X)
  			s2io_rem_isr(sp);
  		s2io_reset(sp);
  		free_rx_buffers(sp);
  		return -ENODEV;
  	}
  
  	timer_setup(&sp->alarm_timer, s2io_alarm_handle, 0);
  	mod_timer(&sp->alarm_timer, jiffies + HZ / 2);
  
  	set_bit(__S2IO_STATE_CARD_UP, &sp->state);
  
  	/*  Enable select interrupts */
  	en_dis_err_alarms(sp, ENA_ALL_INTRS, ENABLE_INTRS);
  	if (sp->config.intr_type != INTA) {
  		interruptible = TX_TRAFFIC_INTR | TX_PIC_INTR;
  		en_dis_able_nic_intrs(sp, interruptible, ENABLE_INTRS);
  	} else {
  		interruptible = TX_TRAFFIC_INTR | RX_TRAFFIC_INTR;
  		interruptible |= TX_PIC_INTR;
  		en_dis_able_nic_intrs(sp, interruptible, ENABLE_INTRS);
  	}
  
  	return 0;
  }
  
  /**
   * s2io_restart_nic - Resets the NIC.
   * @work : work struct containing a pointer to the device private structure
   * Description:
   * This function is scheduled to be run by the s2io_tx_watchdog
   * function after 0.5 secs to reset the NIC. The idea is to reduce
   * the run time of the watch dog routine which is run holding a
   * spin lock.
   */
  
  static void s2io_restart_nic(struct work_struct *work)
  {
  	struct s2io_nic *sp = container_of(work, struct s2io_nic, rst_timer_task);
  	struct net_device *dev = sp->dev;
  
  	rtnl_lock();
  
  	if (!netif_running(dev))
  		goto out_unlock;
  
  	s2io_card_down(sp);
  	if (s2io_card_up(sp)) {
  		DBG_PRINT(ERR_DBG, "%s: Device bring up failed\n", dev->name);
  	}
  	s2io_wake_all_tx_queue(sp);
  	DBG_PRINT(ERR_DBG, "%s: was reset by Tx watchdog timer\n", dev->name);
  out_unlock:
  	rtnl_unlock();
  }
  
  /**
   *  s2io_tx_watchdog - Watchdog for transmit side.
   *  @dev : Pointer to net device structure
   *  @txqueue: index of the hanging queue
   *  Description:
   *  This function is triggered if the Tx Queue is stopped
   *  for a pre-defined amount of time when the Interface is still up.
   *  If the Interface is jammed in such a situation, the hardware is
   *  reset (by s2io_close) and restarted again (by s2io_open) to
   *  overcome any problem that might have been caused in the hardware.
   *  Return value:
   *  void
   */
  
  static void s2io_tx_watchdog(struct net_device *dev, unsigned int txqueue)
  {
  	struct s2io_nic *sp = netdev_priv(dev);
  	struct swStat *swstats = &sp->mac_control.stats_info->sw_stat;
  
  	if (netif_carrier_ok(dev)) {
  		swstats->watchdog_timer_cnt++;
  		schedule_work(&sp->rst_timer_task);
  		swstats->soft_reset_cnt++;
  	}
  }
  
  /**
   *   rx_osm_handler - To perform some OS related operations on SKB.
   *   @ring_data : the ring from which this RxD was extracted.
   *   @rxdp: descriptor
   *   Description:
   *   This function is called by the Rx interrupt serivce routine to perform
   *   some OS related operations on the SKB before passing it to the upper
   *   layers. It mainly checks if the checksum is OK, if so adds it to the
   *   SKBs cksum variable, increments the Rx packet count and passes the SKB
   *   to the upper layer. If the checksum is wrong, it increments the Rx
   *   packet error count, frees the SKB and returns error.
   *   Return value:
   *   SUCCESS on success and -1 on failure.
   */
  static int rx_osm_handler(struct ring_info *ring_data, struct RxD_t * rxdp)
  {
  	struct s2io_nic *sp = ring_data->nic;
  	struct net_device *dev = ring_data->dev;
  	struct sk_buff *skb = (struct sk_buff *)
  		((unsigned long)rxdp->Host_Control);
  	int ring_no = ring_data->ring_no;
  	u16 l3_csum, l4_csum;
  	unsigned long long err = rxdp->Control_1 & RXD_T_CODE;
  	struct lro *lro;
  	u8 err_mask;
  	struct swStat *swstats = &sp->mac_control.stats_info->sw_stat;
  
  	skb->dev = dev;
  
  	if (err) {
  		/* Check for parity error */
  		if (err & 0x1)
  			swstats->parity_err_cnt++;
  
  		err_mask = err >> 48;
  		switch (err_mask) {
  		case 1:
  			swstats->rx_parity_err_cnt++;
  			break;
  
  		case 2:
  			swstats->rx_abort_cnt++;
  			break;
  
  		case 3:
  			swstats->rx_parity_abort_cnt++;
  			break;
  
  		case 4:
  			swstats->rx_rda_fail_cnt++;
  			break;
  
  		case 5:
  			swstats->rx_unkn_prot_cnt++;
  			break;
  
  		case 6:
  			swstats->rx_fcs_err_cnt++;
  			break;
  
  		case 7:
  			swstats->rx_buf_size_err_cnt++;
  			break;
  
  		case 8:
  			swstats->rx_rxd_corrupt_cnt++;
  			break;
  
  		case 15:
  			swstats->rx_unkn_err_cnt++;
  			break;
  		}
  		/*
  		 * Drop the packet if bad transfer code. Exception being
  		 * 0x5, which could be due to unsupported IPv6 extension header.
  		 * In this case, we let stack handle the packet.
  		 * Note that in this case, since checksum will be incorrect,
  		 * stack will validate the same.
  		 */
  		if (err_mask != 0x5) {
  			DBG_PRINT(ERR_DBG, "%s: Rx error Value: 0x%x\n",
  				  dev->name, err_mask);
  			dev->stats.rx_crc_errors++;
  			swstats->mem_freed
  				+= skb->truesize;
  			dev_kfree_skb(skb);
  			ring_data->rx_bufs_left -= 1;
  			rxdp->Host_Control = 0;
  			return 0;
  		}
  	}
  
  	rxdp->Host_Control = 0;
  	if (sp->rxd_mode == RXD_MODE_1) {
  		int len = RXD_GET_BUFFER0_SIZE_1(rxdp->Control_2);
  
  		skb_put(skb, len);
  	} else if (sp->rxd_mode == RXD_MODE_3B) {
  		int get_block = ring_data->rx_curr_get_info.block_index;
  		int get_off = ring_data->rx_curr_get_info.offset;
  		int buf0_len = RXD_GET_BUFFER0_SIZE_3(rxdp->Control_2);
  		int buf2_len = RXD_GET_BUFFER2_SIZE_3(rxdp->Control_2);
  		unsigned char *buff = skb_push(skb, buf0_len);
  
  		struct buffAdd *ba = &ring_data->ba[get_block][get_off];
  		memcpy(buff, ba->ba_0, buf0_len);
  		skb_put(skb, buf2_len);
  	}
  
  	if ((rxdp->Control_1 & TCP_OR_UDP_FRAME) &&
  	    ((!ring_data->lro) ||
  	     (!(rxdp->Control_1 & RXD_FRAME_IP_FRAG))) &&
  	    (dev->features & NETIF_F_RXCSUM)) {
  		l3_csum = RXD_GET_L3_CKSUM(rxdp->Control_1);
  		l4_csum = RXD_GET_L4_CKSUM(rxdp->Control_1);
  		if ((l3_csum == L3_CKSUM_OK) && (l4_csum == L4_CKSUM_OK)) {
  			/*
  			 * NIC verifies if the Checksum of the received
  			 * frame is Ok or not and accordingly returns
  			 * a flag in the RxD.
  			 */
  			skb->ip_summed = CHECKSUM_UNNECESSARY;
  			if (ring_data->lro) {
  				u32 tcp_len = 0;
  				u8 *tcp;
  				int ret = 0;
  
  				ret = s2io_club_tcp_session(ring_data,
  							    skb->data, &tcp,
  							    &tcp_len, &lro,
  							    rxdp, sp);
  				switch (ret) {
  				case 3: /* Begin anew */
  					lro->parent = skb;
  					goto aggregate;
  				case 1: /* Aggregate */
  					lro_append_pkt(sp, lro, skb, tcp_len);
  					goto aggregate;
  				case 4: /* Flush session */
  					lro_append_pkt(sp, lro, skb, tcp_len);
  					queue_rx_frame(lro->parent,
  						       lro->vlan_tag);
  					clear_lro_session(lro);
  					swstats->flush_max_pkts++;
  					goto aggregate;
  				case 2: /* Flush both */
  					lro->parent->data_len = lro->frags_len;
  					swstats->sending_both++;
  					queue_rx_frame(lro->parent,
  						       lro->vlan_tag);
  					clear_lro_session(lro);
  					goto send_up;
  				case 0: /* sessions exceeded */
  				case -1: /* non-TCP or not L2 aggregatable */
  				case 5: /*
  					 * First pkt in session not
  					 * L3/L4 aggregatable
  					 */
  					break;
  				default:
  					DBG_PRINT(ERR_DBG,
  						  "%s: Samadhana!!\n",
  						  __func__);
  					BUG();
  				}
  			}
  		} else {
  			/*
  			 * Packet with erroneous checksum, let the
  			 * upper layers deal with it.
  			 */
  			skb_checksum_none_assert(skb);
  		}
  	} else
  		skb_checksum_none_assert(skb);
  
  	swstats->mem_freed += skb->truesize;
  send_up:
  	skb_record_rx_queue(skb, ring_no);
  	queue_rx_frame(skb, RXD_GET_VLAN_TAG(rxdp->Control_2));
  aggregate:
  	sp->mac_control.rings[ring_no].rx_bufs_left -= 1;
  	return SUCCESS;
  }
  
  /**
   *  s2io_link - stops/starts the Tx queue.
   *  @sp : private member of the device structure, which is a pointer to the
   *  s2io_nic structure.
   *  @link : inidicates whether link is UP/DOWN.
   *  Description:
   *  This function stops/starts the Tx queue depending on whether the link
   *  status of the NIC is is down or up. This is called by the Alarm
   *  interrupt handler whenever a link change interrupt comes up.
   *  Return value:
   *  void.
   */
  
  static void s2io_link(struct s2io_nic *sp, int link)
  {
  	struct net_device *dev = sp->dev;
  	struct swStat *swstats = &sp->mac_control.stats_info->sw_stat;
  
  	if (link != sp->last_link_state) {
  		init_tti(sp, link, false);
  		if (link == LINK_DOWN) {
  			DBG_PRINT(ERR_DBG, "%s: Link down\n", dev->name);
  			s2io_stop_all_tx_queue(sp);
  			netif_carrier_off(dev);
  			if (swstats->link_up_cnt)
  				swstats->link_up_time =
  					jiffies - sp->start_time;
  			swstats->link_down_cnt++;
  		} else {
  			DBG_PRINT(ERR_DBG, "%s: Link Up\n", dev->name);
  			if (swstats->link_down_cnt)
  				swstats->link_down_time =
  					jiffies - sp->start_time;
  			swstats->link_up_cnt++;
  			netif_carrier_on(dev);
  			s2io_wake_all_tx_queue(sp);
  		}
  	}
  	sp->last_link_state = link;
  	sp->start_time = jiffies;
  }
  
  /**
   *  s2io_init_pci -Initialization of PCI and PCI-X configuration registers .
   *  @sp : private member of the device structure, which is a pointer to the
   *  s2io_nic structure.
   *  Description:
   *  This function initializes a few of the PCI and PCI-X configuration registers
   *  with recommended values.
   *  Return value:
   *  void
   */
  
  static void s2io_init_pci(struct s2io_nic *sp)
  {
  	u16 pci_cmd = 0, pcix_cmd = 0;
  
  	/* Enable Data Parity Error Recovery in PCI-X command register. */
  	pci_read_config_word(sp->pdev, PCIX_COMMAND_REGISTER,
  			     &(pcix_cmd));
  	pci_write_config_word(sp->pdev, PCIX_COMMAND_REGISTER,
  			      (pcix_cmd | 1));
  	pci_read_config_word(sp->pdev, PCIX_COMMAND_REGISTER,
  			     &(pcix_cmd));
  
  	/* Set the PErr Response bit in PCI command register. */
  	pci_read_config_word(sp->pdev, PCI_COMMAND, &pci_cmd);
  	pci_write_config_word(sp->pdev, PCI_COMMAND,
  			      (pci_cmd | PCI_COMMAND_PARITY));
  	pci_read_config_word(sp->pdev, PCI_COMMAND, &pci_cmd);
  }
  
  static int s2io_verify_parm(struct pci_dev *pdev, u8 *dev_intr_type,
  			    u8 *dev_multiq)
  {
  	int i;
  
  	if ((tx_fifo_num > MAX_TX_FIFOS) || (tx_fifo_num < 1)) {
  		DBG_PRINT(ERR_DBG, "Requested number of tx fifos "
  			  "(%d) not supported\n", tx_fifo_num);
  
  		if (tx_fifo_num < 1)
  			tx_fifo_num = 1;
  		else
  			tx_fifo_num = MAX_TX_FIFOS;
  
  		DBG_PRINT(ERR_DBG, "Default to %d tx fifos\n", tx_fifo_num);
  	}
  
  	if (multiq)
  		*dev_multiq = multiq;
  
  	if (tx_steering_type && (1 == tx_fifo_num)) {
  		if (tx_steering_type != TX_DEFAULT_STEERING)
  			DBG_PRINT(ERR_DBG,
  				  "Tx steering is not supported with "
  				  "one fifo. Disabling Tx steering.\n");
  		tx_steering_type = NO_STEERING;
  	}
  
  	if ((tx_steering_type < NO_STEERING) ||
  	    (tx_steering_type > TX_DEFAULT_STEERING)) {
  		DBG_PRINT(ERR_DBG,
  			  "Requested transmit steering not supported\n");
  		DBG_PRINT(ERR_DBG, "Disabling transmit steering\n");
  		tx_steering_type = NO_STEERING;
  	}
  
  	if (rx_ring_num > MAX_RX_RINGS) {
  		DBG_PRINT(ERR_DBG,
  			  "Requested number of rx rings not supported\n");
  		DBG_PRINT(ERR_DBG, "Default to %d rx rings\n",
  			  MAX_RX_RINGS);
  		rx_ring_num = MAX_RX_RINGS;
  	}
  
  	if ((*dev_intr_type != INTA) && (*dev_intr_type != MSI_X)) {
  		DBG_PRINT(ERR_DBG, "Wrong intr_type requested. "
  			  "Defaulting to INTA\n");
  		*dev_intr_type = INTA;
  	}
  
  	if ((*dev_intr_type == MSI_X) &&
  	    ((pdev->device != PCI_DEVICE_ID_HERC_WIN) &&
  	     (pdev->device != PCI_DEVICE_ID_HERC_UNI))) {
  		DBG_PRINT(ERR_DBG, "Xframe I does not support MSI_X. "
  			  "Defaulting to INTA\n");
  		*dev_intr_type = INTA;
  	}
  
  	if ((rx_ring_mode != 1) && (rx_ring_mode != 2)) {
  		DBG_PRINT(ERR_DBG, "Requested ring mode not supported\n");
  		DBG_PRINT(ERR_DBG, "Defaulting to 1-buffer mode\n");
  		rx_ring_mode = 1;
  	}
  
  	for (i = 0; i < MAX_RX_RINGS; i++)
  		if (rx_ring_sz[i] > MAX_RX_BLOCKS_PER_RING) {
  			DBG_PRINT(ERR_DBG, "Requested rx ring size not "
  				  "supported\nDefaulting to %d\n",
  				  MAX_RX_BLOCKS_PER_RING);
  			rx_ring_sz[i] = MAX_RX_BLOCKS_PER_RING;
  		}
  
  	return SUCCESS;
  }
  
  /**
   * rts_ds_steer - Receive traffic steering based on IPv4 or IPv6 TOS or Traffic class respectively.
   * @nic: device private variable
   * @ds_codepoint: data
   * @ring: ring index
   * Description: The function configures the receive steering to
   * desired receive ring.
   * Return Value:  SUCCESS on success and
   * '-1' on failure (endian settings incorrect).
   */
  static int rts_ds_steer(struct s2io_nic *nic, u8 ds_codepoint, u8 ring)
  {
  	struct XENA_dev_config __iomem *bar0 = nic->bar0;
  	register u64 val64 = 0;
  
  	if (ds_codepoint > 63)
  		return FAILURE;
  
  	val64 = RTS_DS_MEM_DATA(ring);
  	writeq(val64, &bar0->rts_ds_mem_data);
  
  	val64 = RTS_DS_MEM_CTRL_WE |
  		RTS_DS_MEM_CTRL_STROBE_NEW_CMD |
  		RTS_DS_MEM_CTRL_OFFSET(ds_codepoint);
  
  	writeq(val64, &bar0->rts_ds_mem_ctrl);
  
  	return wait_for_cmd_complete(&bar0->rts_ds_mem_ctrl,
  				     RTS_DS_MEM_CTRL_STROBE_CMD_BEING_EXECUTED,
  				     S2IO_BIT_RESET, true);
  }
  
  static const struct net_device_ops s2io_netdev_ops = {
  	.ndo_open	        = s2io_open,
  	.ndo_stop	        = s2io_close,
  	.ndo_get_stats	        = s2io_get_stats,
  	.ndo_start_xmit    	= s2io_xmit,
  	.ndo_validate_addr	= eth_validate_addr,
  	.ndo_set_rx_mode	= s2io_ndo_set_multicast,
  	.ndo_eth_ioctl		= s2io_ioctl,
  	.ndo_set_mac_address    = s2io_set_mac_addr,
  	.ndo_change_mtu	   	= s2io_change_mtu,
  	.ndo_set_features	= s2io_set_features,
  	.ndo_tx_timeout	   	= s2io_tx_watchdog,
  #ifdef CONFIG_NET_POLL_CONTROLLER
  	.ndo_poll_controller    = s2io_netpoll,
  #endif
  };
  
  /**
   *  s2io_init_nic - Initialization of the adapter .
   *  @pdev : structure containing the PCI related information of the device.
   *  @pre: List of PCI devices supported by the driver listed in s2io_tbl.
   *  Description:
   *  The function initializes an adapter identified by the pci_dec structure.
   *  All OS related initialization including memory and device structure and
   *  initlaization of the device private variable is done. Also the swapper
   *  control register is initialized to enable read and write into the I/O
   *  registers of the device.
   *  Return value:
   *  returns 0 on success and negative on failure.
   */
  
  static int
  s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
  {
  	struct s2io_nic *sp;
  	struct net_device *dev;
  	int i, j, ret;
  	int dma_flag = false;
  	u32 mac_up, mac_down;
  	u64 val64 = 0, tmp64 = 0;
  	struct XENA_dev_config __iomem *bar0 = NULL;
  	u16 subid;
  	struct config_param *config;
  	struct mac_info *mac_control;
  	int mode;
  	u8 dev_intr_type = intr_type;
  	u8 dev_multiq = 0;
  
  	ret = s2io_verify_parm(pdev, &dev_intr_type, &dev_multiq);
  	if (ret)
  		return ret;
  
  	ret = pci_enable_device(pdev);
  	if (ret) {
  		DBG_PRINT(ERR_DBG,
  			  "%s: pci_enable_device failed\n", __func__);
  		return ret;
  	}
  
  	if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
  		DBG_PRINT(INIT_DBG, "%s: Using 64bit DMA\n", __func__);
  		dma_flag = true;
  		if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
  			DBG_PRINT(ERR_DBG,
  				  "Unable to obtain 64bit DMA for coherent allocations\n");
  			pci_disable_device(pdev);
  			return -ENOMEM;
  		}
  	} else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
  		DBG_PRINT(INIT_DBG, "%s: Using 32bit DMA\n", __func__);
  	} else {
  		pci_disable_device(pdev);
  		return -ENOMEM;
  	}
  	ret = pci_request_regions(pdev, s2io_driver_name);
  	if (ret) {
  		DBG_PRINT(ERR_DBG, "%s: Request Regions failed - %x\n",
  			  __func__, ret);
  		pci_disable_device(pdev);
  		return -ENODEV;
  	}
  	if (dev_multiq)
  		dev = alloc_etherdev_mq(sizeof(struct s2io_nic), tx_fifo_num);
  	else
  		dev = alloc_etherdev(sizeof(struct s2io_nic));
  	if (dev == NULL) {
  		pci_disable_device(pdev);
  		pci_release_regions(pdev);
  		return -ENODEV;
  	}
  
  	pci_set_master(pdev);
  	pci_set_drvdata(pdev, dev);
  	SET_NETDEV_DEV(dev, &pdev->dev);
  
  	/*  Private member variable initialized to s2io NIC structure */
  	sp = netdev_priv(dev);
  	sp->dev = dev;
  	sp->pdev = pdev;
  	sp->high_dma_flag = dma_flag;
  	sp->device_enabled_once = false;
  	if (rx_ring_mode == 1)
  		sp->rxd_mode = RXD_MODE_1;
  	if (rx_ring_mode == 2)
  		sp->rxd_mode = RXD_MODE_3B;
  
  	sp->config.intr_type = dev_intr_type;
  
  	if ((pdev->device == PCI_DEVICE_ID_HERC_WIN) ||
  	    (pdev->device == PCI_DEVICE_ID_HERC_UNI))
  		sp->device_type = XFRAME_II_DEVICE;
  	else
  		sp->device_type = XFRAME_I_DEVICE;
  
  
  	/* Initialize some PCI/PCI-X fields of the NIC. */
  	s2io_init_pci(sp);
  
  	/*
  	 * Setting the device configuration parameters.
  	 * Most of these parameters can be specified by the user during
  	 * module insertion as they are module loadable parameters. If
  	 * these parameters are not not specified during load time, they
  	 * are initialized with default values.
  	 */
  	config = &sp->config;
  	mac_control = &sp->mac_control;
  
  	config->napi = napi;
  	config->tx_steering_type = tx_steering_type;
  
  	/* Tx side parameters. */
  	if (config->tx_steering_type == TX_PRIORITY_STEERING)
  		config->tx_fifo_num = MAX_TX_FIFOS;
  	else
  		config->tx_fifo_num = tx_fifo_num;
  
  	/* Initialize the fifos used for tx steering */
  	if (config->tx_fifo_num < 5) {
  		if (config->tx_fifo_num  == 1)
  			sp->total_tcp_fifos = 1;
  		else
  			sp->total_tcp_fifos = config->tx_fifo_num - 1;
  		sp->udp_fifo_idx = config->tx_fifo_num - 1;
  		sp->total_udp_fifos = 1;
  		sp->other_fifo_idx = sp->total_tcp_fifos - 1;
  	} else {
  		sp->total_tcp_fifos = (tx_fifo_num - FIFO_UDP_MAX_NUM -
  				       FIFO_OTHER_MAX_NUM);
  		sp->udp_fifo_idx = sp->total_tcp_fifos;
  		sp->total_udp_fifos = FIFO_UDP_MAX_NUM;
  		sp->other_fifo_idx = sp->udp_fifo_idx + FIFO_UDP_MAX_NUM;
  	}
  
  	config->multiq = dev_multiq;
  	for (i = 0; i < config->tx_fifo_num; i++) {
  		struct tx_fifo_config *tx_cfg = &config->tx_cfg[i];
  
  		tx_cfg->fifo_len = tx_fifo_len[i];
  		tx_cfg->fifo_priority = i;
  	}
  
  	/* mapping the QoS priority to the configured fifos */
  	for (i = 0; i < MAX_TX_FIFOS; i++)
  		config->fifo_mapping[i] = fifo_map[config->tx_fifo_num - 1][i];
  
  	/* map the hashing selector table to the configured fifos */
  	for (i = 0; i < config->tx_fifo_num; i++)
  		sp->fifo_selector[i] = fifo_selector[i];
  
  
  	config->tx_intr_type = TXD_INT_TYPE_UTILZ;
  	for (i = 0; i < config->tx_fifo_num; i++) {
  		struct tx_fifo_config *tx_cfg = &config->tx_cfg[i];
  
  		tx_cfg->f_no_snoop = (NO_SNOOP_TXD | NO_SNOOP_TXD_BUFFER);
  		if (tx_cfg->fifo_len < 65) {
  			config->tx_intr_type = TXD_INT_TYPE_PER_LIST;
  			break;
  		}
  	}
  	/* + 2 because one Txd for skb->data and one Txd for UFO */
  	config->max_txds = MAX_SKB_FRAGS + 2;
  
  	/* Rx side parameters. */
  	config->rx_ring_num = rx_ring_num;
  	for (i = 0; i < config->rx_ring_num; i++) {
  		struct rx_ring_config *rx_cfg = &config->rx_cfg[i];
  		struct ring_info *ring = &mac_control->rings[i];
  
  		rx_cfg->num_rxd = rx_ring_sz[i] * (rxd_count[sp->rxd_mode] + 1);
  		rx_cfg->ring_priority = i;
  		ring->rx_bufs_left = 0;
  		ring->rxd_mode = sp->rxd_mode;
  		ring->rxd_count = rxd_count[sp->rxd_mode];
  		ring->pdev = sp->pdev;
  		ring->dev = sp->dev;
  	}
  
  	for (i = 0; i < rx_ring_num; i++) {
  		struct rx_ring_config *rx_cfg = &config->rx_cfg[i];
  
  		rx_cfg->ring_org = RING_ORG_BUFF1;
  		rx_cfg->f_no_snoop = (NO_SNOOP_RXD | NO_SNOOP_RXD_BUFFER);
  	}
  
  	/*  Setting Mac Control parameters */
  	mac_control->rmac_pause_time = rmac_pause_time;
  	mac_control->mc_pause_threshold_q0q3 = mc_pause_threshold_q0q3;
  	mac_control->mc_pause_threshold_q4q7 = mc_pause_threshold_q4q7;
  
  
  	/*  initialize the shared memory used by the NIC and the host */
  	if (init_shared_mem(sp)) {
  		DBG_PRINT(ERR_DBG, "%s: Memory allocation failed\n", dev->name);
  		ret = -ENOMEM;
  		goto mem_alloc_failed;
  	}
  
  	sp->bar0 = pci_ioremap_bar(pdev, 0);
  	if (!sp->bar0) {
  		DBG_PRINT(ERR_DBG, "%s: Neterion: cannot remap io mem1\n",
  			  dev->name);
  		ret = -ENOMEM;
  		goto bar0_remap_failed;
  	}
  
  	sp->bar1 = pci_ioremap_bar(pdev, 2);
  	if (!sp->bar1) {
  		DBG_PRINT(ERR_DBG, "%s: Neterion: cannot remap io mem2\n",
  			  dev->name);
  		ret = -ENOMEM;
  		goto bar1_remap_failed;
  	}
  
  	/* Initializing the BAR1 address as the start of the FIFO pointer. */
  	for (j = 0; j < MAX_TX_FIFOS; j++) {
  		mac_control->tx_FIFO_start[j] = sp->bar1 + (j * 0x00020000);
  	}
  
  	/*  Driver entry points */
  	dev->netdev_ops = &s2io_netdev_ops;
  	dev->ethtool_ops = &netdev_ethtool_ops;
  	dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM |
  		NETIF_F_TSO | NETIF_F_TSO6 |
  		NETIF_F_RXCSUM | NETIF_F_LRO;
  	dev->features |= dev->hw_features |
  		NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
  	if (sp->high_dma_flag == true)
  		dev->features |= NETIF_F_HIGHDMA;
  	dev->watchdog_timeo = WATCH_DOG_TIMEOUT;
  	INIT_WORK(&sp->rst_timer_task, s2io_restart_nic);
  	INIT_WORK(&sp->set_link_task, s2io_set_link);
  
  	pci_save_state(sp->pdev);
  
  	/* Setting swapper control on the NIC, for proper reset operation */
  	if (s2io_set_swapper(sp)) {
  		DBG_PRINT(ERR_DBG, "%s: swapper settings are wrong\n",
  			  dev->name);
  		ret = -EAGAIN;
  		goto set_swap_failed;
  	}
  
  	/* Verify if the Herc works on the slot its placed into */
  	if (sp->device_type & XFRAME_II_DEVICE) {
  		mode = s2io_verify_pci_mode(sp);
  		if (mode < 0) {
  			DBG_PRINT(ERR_DBG, "%s: Unsupported PCI bus mode\n",
  				  __func__);
  			ret = -EBADSLT;
  			goto set_swap_failed;
  		}
  	}
  
  	if (sp->config.intr_type == MSI_X) {
  		sp->num_entries = config->rx_ring_num + 1;
  		ret = s2io_enable_msi_x(sp);
  
  		if (!ret) {
  			ret = s2io_test_msi(sp);
  			/* rollback MSI-X, will re-enable during add_isr() */
  			remove_msix_isr(sp);
  		}
  		if (ret) {
  
  			DBG_PRINT(ERR_DBG,
  				  "MSI-X requested but failed to enable\n");
  			sp->config.intr_type = INTA;
  		}
  	}
  
  	if (config->intr_type ==  MSI_X) {
  		for (i = 0; i < config->rx_ring_num ; i++) {
  			struct ring_info *ring = &mac_control->rings[i];
  
  			netif_napi_add(dev, &ring->napi, s2io_poll_msix, 64);
  		}
  	} else {
  		netif_napi_add(dev, &sp->napi, s2io_poll_inta, 64);
  	}
  
  	/* Not needed for Herc */
  	if (sp->device_type & XFRAME_I_DEVICE) {
  		/*
  		 * Fix for all "FFs" MAC address problems observed on
  		 * Alpha platforms
  		 */
  		fix_mac_address(sp);
  		s2io_reset(sp);
  	}
  
  	/*
  	 * MAC address initialization.
  	 * For now only one mac address will be read and used.
  	 */
  	bar0 = sp->bar0;
  	val64 = RMAC_ADDR_CMD_MEM_RD | RMAC_ADDR_CMD_MEM_STROBE_NEW_CMD |
  		RMAC_ADDR_CMD_MEM_OFFSET(0 + S2IO_MAC_ADDR_START_OFFSET);
  	writeq(val64, &bar0->rmac_addr_cmd_mem);
  	wait_for_cmd_complete(&bar0->rmac_addr_cmd_mem,
  			      RMAC_ADDR_CMD_MEM_STROBE_CMD_EXECUTING,
  			      S2IO_BIT_RESET, true);
  	tmp64 = readq(&bar0->rmac_addr_data0_mem);
  	mac_down = (u32)tmp64;
  	mac_up = (u32) (tmp64 >> 32);
  
  	sp->def_mac_addr[0].mac_addr[3] = (u8) (mac_up);
  	sp->def_mac_addr[0].mac_addr[2] = (u8) (mac_up >> 8);
  	sp->def_mac_addr[0].mac_addr[1] = (u8) (mac_up >> 16);
  	sp->def_mac_addr[0].mac_addr[0] = (u8) (mac_up >> 24);
  	sp->def_mac_addr[0].mac_addr[5] = (u8) (mac_down >> 16);
  	sp->def_mac_addr[0].mac_addr[4] = (u8) (mac_down >> 24);
  
  	/*  Set the factory defined MAC address initially   */
  	dev->addr_len = ETH_ALEN;
  	eth_hw_addr_set(dev, sp->def_mac_addr[0].mac_addr);
  
  	/* initialize number of multicast & unicast MAC entries variables */
  	if (sp->device_type == XFRAME_I_DEVICE) {
  		config->max_mc_addr = S2IO_XENA_MAX_MC_ADDRESSES;
  		config->max_mac_addr = S2IO_XENA_MAX_MAC_ADDRESSES;
  		config->mc_start_offset = S2IO_XENA_MC_ADDR_START_OFFSET;
  	} else if (sp->device_type == XFRAME_II_DEVICE) {
  		config->max_mc_addr = S2IO_HERC_MAX_MC_ADDRESSES;
  		config->max_mac_addr = S2IO_HERC_MAX_MAC_ADDRESSES;
  		config->mc_start_offset = S2IO_HERC_MC_ADDR_START_OFFSET;
  	}
  
  	/* MTU range: 46 - 9600 */
  	dev->min_mtu = MIN_MTU;
  	dev->max_mtu = S2IO_JUMBO_SIZE;
  
  	/* store mac addresses from CAM to s2io_nic structure */
  	do_s2io_store_unicast_mc(sp);
  
  	/* Configure MSIX vector for number of rings configured plus one */
  	if ((sp->device_type == XFRAME_II_DEVICE) &&
  	    (config->intr_type == MSI_X))
  		sp->num_entries = config->rx_ring_num + 1;
  
  	/* Store the values of the MSIX table in the s2io_nic structure */
  	store_xmsi_data(sp);
  	/* reset Nic and bring it to known state */
  	s2io_reset(sp);
  
  	/*
  	 * Initialize link state flags
  	 * and the card state parameter
  	 */
  	sp->state = 0;
  
  	/* Initialize spinlocks */
  	for (i = 0; i < sp->config.tx_fifo_num; i++) {
  		struct fifo_info *fifo = &mac_control->fifos[i];
  
  		spin_lock_init(&fifo->tx_lock);
  	}
  
  	/*
  	 * SXE-002: Configure link and activity LED to init state
  	 * on driver load.
  	 */
  	subid = sp->pdev->subsystem_device;
  	if ((subid & 0xFF) >= 0x07) {
  		val64 = readq(&bar0->gpio_control);
  		val64 |= 0x0000800000000000ULL;
  		writeq(val64, &bar0->gpio_control);
  		val64 = 0x0411040400000000ULL;
  		writeq(val64, (void __iomem *)bar0 + 0x2700);
  		val64 = readq(&bar0->gpio_control);
  	}
  
  	sp->rx_csum = 1;	/* Rx chksum verify enabled by default */
  
  	if (register_netdev(dev)) {
  		DBG_PRINT(ERR_DBG, "Device registration failed\n");
  		ret = -ENODEV;
  		goto register_failed;
  	}
  	s2io_vpd_read(sp);
  	DBG_PRINT(ERR_DBG, "Copyright(c) 2002-2010 Exar Corp.\n");
  	DBG_PRINT(ERR_DBG, "%s: Neterion %s (rev %d)\n", dev->name,
  		  sp->product_name, pdev->revision);
  	DBG_PRINT(ERR_DBG, "%s: Driver version %s\n", dev->name,
  		  s2io_driver_version);
  	DBG_PRINT(ERR_DBG, "%s: MAC Address: %pM\n", dev->name, dev->dev_addr);
  	DBG_PRINT(ERR_DBG, "Serial number: %s\n", sp->serial_num);
  	if (sp->device_type & XFRAME_II_DEVICE) {
  		mode = s2io_print_pci_mode(sp);
  		if (mode < 0) {
  			ret = -EBADSLT;
  			unregister_netdev(dev);
  			goto set_swap_failed;
  		}
  	}
  	switch (sp->rxd_mode) {
  	case RXD_MODE_1:
  		DBG_PRINT(ERR_DBG, "%s: 1-Buffer receive mode enabled\n",
  			  dev->name);
  		break;
  	case RXD_MODE_3B:
  		DBG_PRINT(ERR_DBG, "%s: 2-Buffer receive mode enabled\n",
  			  dev->name);
  		break;
  	}
  
  	switch (sp->config.napi) {
  	case 0:
  		DBG_PRINT(ERR_DBG, "%s: NAPI disabled\n", dev->name);
  		break;
  	case 1:
  		DBG_PRINT(ERR_DBG, "%s: NAPI enabled\n", dev->name);
  		break;
  	}
  
  	DBG_PRINT(ERR_DBG, "%s: Using %d Tx fifo(s)\n", dev->name,
  		  sp->config.tx_fifo_num);
  
  	DBG_PRINT(ERR_DBG, "%s: Using %d Rx ring(s)\n", dev->name,
  		  sp->config.rx_ring_num);
  
  	switch (sp->config.intr_type) {
  	case INTA:
  		DBG_PRINT(ERR_DBG, "%s: Interrupt type INTA\n", dev->name);
  		break;
  	case MSI_X:
  		DBG_PRINT(ERR_DBG, "%s: Interrupt type MSI-X\n", dev->name);
  		break;
  	}
  	if (sp->config.multiq) {
  		for (i = 0; i < sp->config.tx_fifo_num; i++) {
  			struct fifo_info *fifo = &mac_control->fifos[i];
  
  			fifo->multiq = config->multiq;
  		}
  		DBG_PRINT(ERR_DBG, "%s: Multiqueue support enabled\n",
  			  dev->name);
  	} else
  		DBG_PRINT(ERR_DBG, "%s: Multiqueue support disabled\n",
  			  dev->name);
  
  	switch (sp->config.tx_steering_type) {
  	case NO_STEERING:
  		DBG_PRINT(ERR_DBG, "%s: No steering enabled for transmit\n",
  			  dev->name);
  		break;
  	case TX_PRIORITY_STEERING:
  		DBG_PRINT(ERR_DBG,
  			  "%s: Priority steering enabled for transmit\n",
  			  dev->name);
  		break;
  	case TX_DEFAULT_STEERING:
  		DBG_PRINT(ERR_DBG,
  			  "%s: Default steering enabled for transmit\n",
  			  dev->name);
  	}
  
  	DBG_PRINT(ERR_DBG, "%s: Large receive offload enabled\n",
  		  dev->name);
  	/* Initialize device name */
  	snprintf(sp->name, sizeof(sp->name), "%s Neterion %s", dev->name,
  		 sp->product_name);
  
  	if (vlan_tag_strip)
  		sp->vlan_strip_flag = 1;
  	else
  		sp->vlan_strip_flag = 0;
  
  	/*
  	 * Make Link state as off at this point, when the Link change
  	 * interrupt comes the state will be automatically changed to
  	 * the right state.
  	 */
  	netif_carrier_off(dev);
  
  	return 0;
  
  register_failed:
  set_swap_failed:
  	iounmap(sp->bar1);
  bar1_remap_failed:
  	iounmap(sp->bar0);
  bar0_remap_failed:
  mem_alloc_failed:
  	free_shared_mem(sp);
  	pci_disable_device(pdev);
  	pci_release_regions(pdev);
  	free_netdev(dev);
  
  	return ret;
  }
  
  /**
   * s2io_rem_nic - Free the PCI device
   * @pdev: structure containing the PCI related information of the device.
   * Description: This function is called by the Pci subsystem to release a
   * PCI device and free up all resource held up by the device. This could
   * be in response to a Hot plug event or when the driver is to be removed
   * from memory.
   */
  
  static void s2io_rem_nic(struct pci_dev *pdev)
  {
  	struct net_device *dev = pci_get_drvdata(pdev);
  	struct s2io_nic *sp;
  
  	if (dev == NULL) {
  		DBG_PRINT(ERR_DBG, "Driver Data is NULL!!\n");
  		return;
  	}
  
  	sp = netdev_priv(dev);
  
  	cancel_work_sync(&sp->rst_timer_task);
  	cancel_work_sync(&sp->set_link_task);
  
  	unregister_netdev(dev);
  
  	free_shared_mem(sp);
  	iounmap(sp->bar0);
  	iounmap(sp->bar1);
  	pci_release_regions(pdev);
  	free_netdev(dev);
  	pci_disable_device(pdev);
  }
  
  module_pci_driver(s2io_driver);
  
  static int check_L2_lro_capable(u8 *buffer, struct iphdr **ip,
  				struct tcphdr **tcp, struct RxD_t *rxdp,
  				struct s2io_nic *sp)
  {
  	int ip_off;
  	u8 l2_type = (u8)((rxdp->Control_1 >> 37) & 0x7), ip_len;
  
  	if (!(rxdp->Control_1 & RXD_FRAME_PROTO_TCP)) {
  		DBG_PRINT(INIT_DBG,
  			  "%s: Non-TCP frames not supported for LRO\n",
  			  __func__);
  		return -1;
  	}
  
  	/* Checking for DIX type or DIX type with VLAN */
  	if ((l2_type == 0) || (l2_type == 4)) {
  		ip_off = HEADER_ETHERNET_II_802_3_SIZE;
  		/*
  		 * If vlan stripping is disabled and the frame is VLAN tagged,
  		 * shift the offset by the VLAN header size bytes.
  		 */
  		if ((!sp->vlan_strip_flag) &&
  		    (rxdp->Control_1 & RXD_FRAME_VLAN_TAG))
  			ip_off += HEADER_VLAN_SIZE;
  	} else {
  		/* LLC, SNAP etc are considered non-mergeable */
  		return -1;
  	}
  
  	*ip = (struct iphdr *)(buffer + ip_off);
  	ip_len = (u8)((*ip)->ihl);
  	ip_len <<= 2;
  	*tcp = (struct tcphdr *)((unsigned long)*ip + ip_len);
  
  	return 0;
  }
  
  static int check_for_socket_match(struct lro *lro, struct iphdr *ip,
  				  struct tcphdr *tcp)
  {
  	DBG_PRINT(INFO_DBG, "%s: Been here...\n", __func__);
  	if ((lro->iph->saddr != ip->saddr) ||
  	    (lro->iph->daddr != ip->daddr) ||
  	    (lro->tcph->source != tcp->source) ||
  	    (lro->tcph->dest != tcp->dest))
  		return -1;
  	return 0;
  }
  
  static inline int get_l4_pyld_length(struct iphdr *ip, struct tcphdr *tcp)
  {
  	return ntohs(ip->tot_len) - (ip->ihl << 2) - (tcp->doff << 2);
  }
  
  static void initiate_new_session(struct lro *lro, u8 *l2h,
  				 struct iphdr *ip, struct tcphdr *tcp,
  				 u32 tcp_pyld_len, u16 vlan_tag)
  {
  	DBG_PRINT(INFO_DBG, "%s: Been here...\n", __func__);
  	lro->l2h = l2h;
  	lro->iph = ip;
  	lro->tcph = tcp;
  	lro->tcp_next_seq = tcp_pyld_len + ntohl(tcp->seq);
  	lro->tcp_ack = tcp->ack_seq;
  	lro->sg_num = 1;
  	lro->total_len = ntohs(ip->tot_len);
  	lro->frags_len = 0;
  	lro->vlan_tag = vlan_tag;
  	/*
  	 * Check if we saw TCP timestamp.
  	 * Other consistency checks have already been done.
  	 */
  	if (tcp->doff == 8) {
  		__be32 *ptr;
  		ptr = (__be32 *)(tcp+1);
  		lro->saw_ts = 1;
  		lro->cur_tsval = ntohl(*(ptr+1));
  		lro->cur_tsecr = *(ptr+2);
  	}
  	lro->in_use = 1;
  }
  
  static void update_L3L4_header(struct s2io_nic *sp, struct lro *lro)
  {
  	struct iphdr *ip = lro->iph;
  	struct tcphdr *tcp = lro->tcph;
  	struct swStat *swstats = &sp->mac_control.stats_info->sw_stat;
  
  	DBG_PRINT(INFO_DBG, "%s: Been here...\n", __func__);
  
  	/* Update L3 header */
  	csum_replace2(&ip->check, ip->tot_len, htons(lro->total_len));
  	ip->tot_len = htons(lro->total_len);
  
  	/* Update L4 header */
  	tcp->ack_seq = lro->tcp_ack;
  	tcp->window = lro->window;
  
  	/* Update tsecr field if this session has timestamps enabled */
  	if (lro->saw_ts) {
  		__be32 *ptr = (__be32 *)(tcp + 1);
  		*(ptr+2) = lro->cur_tsecr;
  	}
  
  	/* Update counters required for calculation of
  	 * average no. of packets aggregated.
  	 */
  	swstats->sum_avg_pkts_aggregated += lro->sg_num;
  	swstats->num_aggregations++;
  }
  
  static void aggregate_new_rx(struct lro *lro, struct iphdr *ip,
  			     struct tcphdr *tcp, u32 l4_pyld)
  {
  	DBG_PRINT(INFO_DBG, "%s: Been here...\n", __func__);
  	lro->total_len += l4_pyld;
  	lro->frags_len += l4_pyld;
  	lro->tcp_next_seq += l4_pyld;
  	lro->sg_num++;
  
  	/* Update ack seq no. and window ad(from this pkt) in LRO object */
  	lro->tcp_ack = tcp->ack_seq;
  	lro->window = tcp->window;
  
  	if (lro->saw_ts) {
  		__be32 *ptr;
  		/* Update tsecr and tsval from this packet */
  		ptr = (__be32 *)(tcp+1);
  		lro->cur_tsval = ntohl(*(ptr+1));
  		lro->cur_tsecr = *(ptr + 2);
  	}
  }
  
  static int verify_l3_l4_lro_capable(struct lro *l_lro, struct iphdr *ip,
  				    struct tcphdr *tcp, u32 tcp_pyld_len)
  {
  	u8 *ptr;
  
  	DBG_PRINT(INFO_DBG, "%s: Been here...\n", __func__);
  
  	if (!tcp_pyld_len) {
  		/* Runt frame or a pure ack */
  		return -1;
  	}
  
  	if (ip->ihl != 5) /* IP has options */
  		return -1;
  
  	/* If we see CE codepoint in IP header, packet is not mergeable */
  	if (INET_ECN_is_ce(ipv4_get_dsfield(ip)))
  		return -1;
  
  	/* If we see ECE or CWR flags in TCP header, packet is not mergeable */
  	if (tcp->urg || tcp->psh || tcp->rst ||
  	    tcp->syn || tcp->fin ||
  	    tcp->ece || tcp->cwr || !tcp->ack) {
  		/*
  		 * Currently recognize only the ack control word and
  		 * any other control field being set would result in
  		 * flushing the LRO session
  		 */
  		return -1;
  	}
  
  	/*
  	 * Allow only one TCP timestamp option. Don't aggregate if
  	 * any other options are detected.
  	 */
  	if (tcp->doff != 5 && tcp->doff != 8)
  		return -1;
  
  	if (tcp->doff == 8) {
  		ptr = (u8 *)(tcp + 1);
  		while (*ptr == TCPOPT_NOP)
  			ptr++;
  		if (*ptr != TCPOPT_TIMESTAMP || *(ptr+1) != TCPOLEN_TIMESTAMP)
  			return -1;
  
  		/* Ensure timestamp value increases monotonically */
  		if (l_lro)
  			if (l_lro->cur_tsval > ntohl(*((__be32 *)(ptr+2))))
  				return -1;
  
  		/* timestamp echo reply should be non-zero */
  		if (*((__be32 *)(ptr+6)) == 0)
  			return -1;
  	}
  
  	return 0;
  }
  
  static int s2io_club_tcp_session(struct ring_info *ring_data, u8 *buffer,
  				 u8 **tcp, u32 *tcp_len, struct lro **lro,
  				 struct RxD_t *rxdp, struct s2io_nic *sp)
  {
  	struct iphdr *ip;
  	struct tcphdr *tcph;
  	int ret = 0, i;
  	u16 vlan_tag = 0;
  	struct swStat *swstats = &sp->mac_control.stats_info->sw_stat;
  
  	ret = check_L2_lro_capable(buffer, &ip, (struct tcphdr **)tcp,
  				   rxdp, sp);
  	if (ret)
  		return ret;
  
  	DBG_PRINT(INFO_DBG, "IP Saddr: %x Daddr: %x\n", ip->saddr, ip->daddr);
  
  	vlan_tag = RXD_GET_VLAN_TAG(rxdp->Control_2);
  	tcph = (struct tcphdr *)*tcp;
  	*tcp_len = get_l4_pyld_length(ip, tcph);
  	for (i = 0; i < MAX_LRO_SESSIONS; i++) {
  		struct lro *l_lro = &ring_data->lro0_n[i];
  		if (l_lro->in_use) {
  			if (check_for_socket_match(l_lro, ip, tcph))
  				continue;
  			/* Sock pair matched */
  			*lro = l_lro;
  
  			if ((*lro)->tcp_next_seq != ntohl(tcph->seq)) {
  				DBG_PRINT(INFO_DBG, "%s: Out of sequence. "
  					  "expected 0x%x, actual 0x%x\n",
  					  __func__,
  					  (*lro)->tcp_next_seq,
  					  ntohl(tcph->seq));
  
  				swstats->outof_sequence_pkts++;
  				ret = 2;
  				break;
  			}
  
  			if (!verify_l3_l4_lro_capable(l_lro, ip, tcph,
  						      *tcp_len))
  				ret = 1; /* Aggregate */
  			else
  				ret = 2; /* Flush both */
  			break;
  		}
  	}
  
  	if (ret == 0) {
  		/* Before searching for available LRO objects,
  		 * check if the pkt is L3/L4 aggregatable. If not
  		 * don't create new LRO session. Just send this
  		 * packet up.
  		 */
  		if (verify_l3_l4_lro_capable(NULL, ip, tcph, *tcp_len))
  			return 5;
  
  		for (i = 0; i < MAX_LRO_SESSIONS; i++) {
  			struct lro *l_lro = &ring_data->lro0_n[i];
  			if (!(l_lro->in_use)) {
  				*lro = l_lro;
  				ret = 3; /* Begin anew */
  				break;
  			}
  		}
  	}
  
  	if (ret == 0) { /* sessions exceeded */
  		DBG_PRINT(INFO_DBG, "%s: All LRO sessions already in use\n",
  			  __func__);
  		*lro = NULL;
  		return ret;
  	}
  
  	switch (ret) {
  	case 3:
  		initiate_new_session(*lro, buffer, ip, tcph, *tcp_len,
  				     vlan_tag);
  		break;
  	case 2:
  		update_L3L4_header(sp, *lro);
  		break;
  	case 1:
  		aggregate_new_rx(*lro, ip, tcph, *tcp_len);
  		if ((*lro)->sg_num == sp->lro_max_aggr_per_sess) {
  			update_L3L4_header(sp, *lro);
  			ret = 4; /* Flush the LRO */
  		}
  		break;
  	default:
  		DBG_PRINT(ERR_DBG, "%s: Don't know, can't say!!\n", __func__);
  		break;
  	}
  
  	return ret;
  }
  
  static void clear_lro_session(struct lro *lro)
  {
  	static u16 lro_struct_size = sizeof(struct lro);
  
  	memset(lro, 0, lro_struct_size);
  }
  
  static void queue_rx_frame(struct sk_buff *skb, u16 vlan_tag)
  {
  	struct net_device *dev = skb->dev;
  	struct s2io_nic *sp = netdev_priv(dev);
  
  	skb->protocol = eth_type_trans(skb, dev);
  	if (vlan_tag && sp->vlan_strip_flag)
  		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
  	if (sp->config.napi)
  		netif_receive_skb(skb);
  	else
  		netif_rx(skb);
  }
  
  static void lro_append_pkt(struct s2io_nic *sp, struct lro *lro,
  			   struct sk_buff *skb, u32 tcp_len)
  {
  	struct sk_buff *first = lro->parent;
  	struct swStat *swstats = &sp->mac_control.stats_info->sw_stat;
  
  	first->len += tcp_len;
  	first->data_len = lro->frags_len;
  	skb_pull(skb, (skb->len - tcp_len));
  	if (skb_shinfo(first)->frag_list)
  		lro->last_frag->next = skb;
  	else
  		skb_shinfo(first)->frag_list = skb;
  	first->truesize += skb->truesize;
  	lro->last_frag = skb;
  	swstats->clubbed_frms_cnt++;
  }
  
  /**
   * s2io_io_error_detected - called when PCI error is detected
   * @pdev: Pointer to PCI device
   * @state: The current pci connection state
   *
   * This function is called after a PCI bus error affecting
   * this device has been detected.
   */
  static pci_ers_result_t s2io_io_error_detected(struct pci_dev *pdev,
  					       pci_channel_state_t state)
  {
  	struct net_device *netdev = pci_get_drvdata(pdev);
  	struct s2io_nic *sp = netdev_priv(netdev);
  
  	netif_device_detach(netdev);
  
  	if (state == pci_channel_io_perm_failure)
  		return PCI_ERS_RESULT_DISCONNECT;
  
  	if (netif_running(netdev)) {
  		/* Bring down the card, while avoiding PCI I/O */
  		do_s2io_card_down(sp, 0);
  	}
  	pci_disable_device(pdev);
  
  	return PCI_ERS_RESULT_NEED_RESET;
  }
  
  /**
   * s2io_io_slot_reset - called after the pci bus has been reset.
   * @pdev: Pointer to PCI device
   *
   * Restart the card from scratch, as if from a cold-boot.
   * At this point, the card has exprienced a hard reset,
   * followed by fixups by BIOS, and has its config space
   * set up identically to what it was at cold boot.
   */
  static pci_ers_result_t s2io_io_slot_reset(struct pci_dev *pdev)
  {
  	struct net_device *netdev = pci_get_drvdata(pdev);
  	struct s2io_nic *sp = netdev_priv(netdev);
  
  	if (pci_enable_device(pdev)) {
  		pr_err("Cannot re-enable PCI device after reset.\n");
  		return PCI_ERS_RESULT_DISCONNECT;
  	}
  
  	pci_set_master(pdev);
  	s2io_reset(sp);
  
  	return PCI_ERS_RESULT_RECOVERED;
  }
  
  /**
   * s2io_io_resume - called when traffic can start flowing again.
   * @pdev: Pointer to PCI device
   *
   * This callback is called when the error recovery driver tells
   * us that its OK to resume normal operation.
   */
  static void s2io_io_resume(struct pci_dev *pdev)
  {
  	struct net_device *netdev = pci_get_drvdata(pdev);
  	struct s2io_nic *sp = netdev_priv(netdev);
  
  	if (netif_running(netdev)) {
  		if (s2io_card_up(sp)) {
  			pr_err("Can't bring device back up after reset.\n");
  			return;
  		}
  
  		if (do_s2io_prog_unicast(netdev, netdev->dev_addr) == FAILURE) {
  			s2io_card_down(sp);
  			pr_err("Can't restore mac addr after reset.\n");
  			return;
  		}
  	}
  
  	netif_device_attach(netdev);
  	netif_tx_wake_all_queues(netdev);
  }
  