text: /*
   * Copyright (c) 2006 - 2011 Intel Corporation.  All rights reserved.
   * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
   *
   * This software is available to you under a choice of one of two
   * licenses.  You may choose to be licensed under the terms of the GNU
   * General Public License (GPL) Version 2, available from the file
   * COPYING in the main directory of this source tree, or the
   * OpenIB.org BSD license below:
   *
   *     Redistribution and use in source and binary forms, with or
   *     without modification, are permitted provided that the following
   *     conditions are met:
   *
   *      - Redistributions of source code must retain the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer.
   *
   *      - Redistributions in binary form must reproduce the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer in the documentation and/or other materials
   *        provided with the distribution.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/netdevice.h>
  #include <linux/etherdevice.h>
  #include <linux/ethtool.h>
  #include <linux/mii.h>
  #include <linux/if_vlan.h>
  #include <linux/crc32.h>
  #include <linux/in.h>
  #include <linux/fs.h>
  #include <linux/init.h>
  #include <linux/if_arp.h>
  #include <linux/highmem.h>
  #include <linux/slab.h>
  #include <asm/io.h>
  #include <asm/irq.h>
  #include <asm/byteorder.h>
  #include <rdma/ib_smi.h>
  #include <rdma/ib_verbs.h>
  #include <rdma/ib_pack.h>
  #include <rdma/iw_cm.h>
  
  #include "nes.h"
  
  #include <net/netevent.h>
  #include <net/neighbour.h>
  #include <linux/route.h>
  #include <net/ip_fib.h>
  
  MODULE_AUTHOR("NetEffect");
  MODULE_DESCRIPTION("NetEffect RNIC Low-level iWARP Driver");
  MODULE_LICENSE("Dual BSD/GPL");
  MODULE_VERSION(DRV_VERSION);
  
  int max_mtu = 9000;
  int interrupt_mod_interval = 0;
  
  
  /* Interoperability */
  int mpa_version = 1;
  module_param(mpa_version, int, 0644);
  MODULE_PARM_DESC(mpa_version, "MPA version to be used int MPA Req/Resp (0 or 1)");
  
  /* Interoperability */
  int disable_mpa_crc = 0;
  module_param(disable_mpa_crc, int, 0644);
  MODULE_PARM_DESC(disable_mpa_crc, "Disable checking of MPA CRC");
  
  unsigned int nes_drv_opt = NES_DRV_OPT_DISABLE_INT_MOD | NES_DRV_OPT_ENABLE_PAU;
  module_param(nes_drv_opt, int, 0644);
  MODULE_PARM_DESC(nes_drv_opt, "Driver option parameters");
  
  unsigned int nes_debug_level = 0;
  module_param_named(debug_level, nes_debug_level, uint, 0644);
  MODULE_PARM_DESC(debug_level, "Enable debug output level");
  
  unsigned int wqm_quanta = 0x10000;
  module_param(wqm_quanta, int, 0644);
  MODULE_PARM_DESC(wqm_quanta, "WQM quanta");
  
  static bool limit_maxrdreqsz;
  module_param(limit_maxrdreqsz, bool, 0644);
  MODULE_PARM_DESC(limit_maxrdreqsz, "Limit max read request size to 256 Bytes");
  
  LIST_HEAD(nes_adapter_list);
  static LIST_HEAD(nes_dev_list);
  
  atomic_t qps_destroyed;
  
  static unsigned int ee_flsh_adapter;
  static unsigned int sysfs_nonidx_addr;
  static unsigned int sysfs_idx_addr;
  
  static struct pci_device_id nes_pci_table[] = {
  	{ PCI_VDEVICE(NETEFFECT, PCI_DEVICE_ID_NETEFFECT_NE020), },
  	{ PCI_VDEVICE(NETEFFECT, PCI_DEVICE_ID_NETEFFECT_NE020_KR), },
  	{0}
  };
  
  MODULE_DEVICE_TABLE(pci, nes_pci_table);
  
  static int nes_inetaddr_event(struct notifier_block *, unsigned long, void *);
  static int nes_net_event(struct notifier_block *, unsigned long, void *);
  static int nes_notifiers_registered;
  
  
  static struct notifier_block nes_inetaddr_notifier = {
  	.notifier_call = nes_inetaddr_event
  };
  
  static struct notifier_block nes_net_notifier = {
  	.notifier_call = nes_net_event
  };
  
  /**
   * nes_inetaddr_event
   */
  static int nes_inetaddr_event(struct notifier_block *notifier,
  		unsigned long event, void *ptr)
  {
  	struct in_ifaddr *ifa = ptr;
  	struct net_device *event_netdev = ifa->ifa_dev->dev;
  	struct nes_device *nesdev;
  	struct net_device *netdev;
  	struct net_device *upper_dev;
  	struct nes_vnic *nesvnic;
  	unsigned int is_bonded;
  
  	nes_debug(NES_DBG_NETDEV, "nes_inetaddr_event: ip address %pI4, netmask %pI4.\n",
  		  &ifa->ifa_address, &ifa->ifa_mask);
  	list_for_each_entry(nesdev, &nes_dev_list, list) {
  		nes_debug(NES_DBG_NETDEV, "Nesdev list entry = 0x%p. (%s)\n",
  				nesdev, nesdev->netdev[0]->name);
  		netdev = nesdev->netdev[0];
  		nesvnic = netdev_priv(netdev);
  		upper_dev = netdev_master_upper_dev_get(netdev);
  		is_bonded = netif_is_bond_slave(netdev) &&
  			    (upper_dev == event_netdev);
  		if ((netdev == event_netdev) || is_bonded) {
  			if (nesvnic->rdma_enabled == 0) {
  				nes_debug(NES_DBG_NETDEV, "Returning without processing event for %s since"
  						" RDMA is not enabled.\n",
  						netdev->name);
  				return NOTIFY_OK;
  			}
  			/* we have ifa->ifa_address/mask here if we need it */
  			switch (event) {
  				case NETDEV_DOWN:
  					nes_debug(NES_DBG_NETDEV, "event:DOWN\n");
  					nes_write_indexed(nesdev,
  							NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)), 0);
  
  					nes_manage_arp_cache(netdev, netdev->dev_addr,
  							ntohl(nesvnic->local_ipaddr), NES_ARP_DELETE);
  					nesvnic->local_ipaddr = 0;
  					if (is_bonded)
  						continue;
  					else
  						return NOTIFY_OK;
  					break;
  				case NETDEV_UP:
  					nes_debug(NES_DBG_NETDEV, "event:UP\n");
  
  					if (nesvnic->local_ipaddr != 0) {
  						nes_debug(NES_DBG_NETDEV, "Interface already has local_ipaddr\n");
  						return NOTIFY_OK;
  					}
  					/* fall through */
  				case NETDEV_CHANGEADDR:
  					/* Add the address to the IP table */
  					if (upper_dev)
  						nesvnic->local_ipaddr =
  							((struct in_device *)upper_dev->ip_ptr)->ifa_list->ifa_address;
  					else
  						nesvnic->local_ipaddr = ifa->ifa_address;
  
  					nes_write_indexed(nesdev,
  							NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)),
  							ntohl(nesvnic->local_ipaddr));
  					nes_manage_arp_cache(netdev, netdev->dev_addr,
  							ntohl(nesvnic->local_ipaddr), NES_ARP_ADD);
  					if (is_bonded)
  						continue;
  					else
  						return NOTIFY_OK;
  					break;
  				default:
  					break;
  			}
  		}
  	}
  
  	return NOTIFY_DONE;
  }
  
  
  /**
   * nes_net_event
   */
  static int nes_net_event(struct notifier_block *notifier,
  		unsigned long event, void *ptr)
  {
  	struct neighbour *neigh = ptr;
  	struct nes_device *nesdev;
  	struct net_device *netdev;
  	struct nes_vnic *nesvnic;
  
  	switch (event) {
  		case NETEVENT_NEIGH_UPDATE:
  			list_for_each_entry(nesdev, &nes_dev_list, list) {
  				/* nes_debug(NES_DBG_NETDEV, "Nesdev list entry = 0x%p.\n", nesdev); */
  				netdev = nesdev->netdev[0];
  				nesvnic = netdev_priv(netdev);
  				if (netdev == neigh->dev) {
  					if (nesvnic->rdma_enabled == 0) {
  						nes_debug(NES_DBG_NETDEV, "Skipping device %s since no RDMA\n",
  								netdev->name);
  					} else {
  						if (neigh->nud_state & NUD_VALID) {
  							nes_manage_arp_cache(neigh->dev, neigh->ha,
  									ntohl(*(__be32 *)neigh->primary_key), NES_ARP_ADD);
  						} else {
  							nes_manage_arp_cache(neigh->dev, neigh->ha,
  									ntohl(*(__be32 *)neigh->primary_key), NES_ARP_DELETE);
  						}
  					}
  					return NOTIFY_OK;
  				}
  			}
  			break;
  		default:
  			nes_debug(NES_DBG_NETDEV, "NETEVENT_ %lu undefined\n", event);
  			break;
  	}
  
  	return NOTIFY_DONE;
  }
  
  
  /**
   * nes_add_ref
   */
  void nes_add_ref(struct ib_qp *ibqp)
  {
  	struct nes_qp *nesqp;
  
  	nesqp = to_nesqp(ibqp);
  	nes_debug(NES_DBG_QP, "Bumping refcount for QP%u.  Pre-inc value = %u\n",
  			ibqp->qp_num, atomic_read(&nesqp->refcount));
  	atomic_inc(&nesqp->refcount);
  }
  
  static void nes_cqp_rem_ref_callback(struct nes_device *nesdev, struct nes_cqp_request *cqp_request)
  {
  	unsigned long flags;
  	struct nes_qp *nesqp = cqp_request->cqp_callback_pointer;
  	struct nes_adapter *nesadapter = nesdev->nesadapter;
  
  	atomic_inc(&qps_destroyed);
  
  	/* Free the control structures */
  
  	if (nesqp->pbl_vbase) {
  		pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
  				nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
  		spin_lock_irqsave(&nesadapter->pbl_lock, flags);
  		nesadapter->free_256pbl++;
  		spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
  		pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
  		nesqp->pbl_vbase = NULL;
  
  	} else {
  		pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
  				nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
  	}
  	nes_free_resource(nesadapter, nesadapter->allocated_qps, nesqp->hwqp.qp_id);
  
  	nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = NULL;
  	kfree(nesqp->allocated_buffer);
  
  }
  
  /**
   * nes_rem_ref
   */
  void nes_rem_ref(struct ib_qp *ibqp)
  {
  	u64 u64temp;
  	struct nes_qp *nesqp;
  	struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
  	struct nes_device *nesdev = nesvnic->nesdev;
  	struct nes_hw_cqp_wqe *cqp_wqe;
  	struct nes_cqp_request *cqp_request;
  	u32 opcode;
  
  	nesqp = to_nesqp(ibqp);
  
  	if (atomic_read(&nesqp->refcount) == 0) {
  		printk(KERN_INFO PFX "%s: Reference count already 0 for QP%d, last aeq = 0x%04X.\n",
  				__func__, ibqp->qp_num, nesqp->last_aeq);
  		BUG();
  	}
  
  	if (atomic_dec_and_test(&nesqp->refcount)) {
  		if (nesqp->pau_mode)
  			nes_destroy_pau_qp(nesdev, nesqp);
  
  		/* Destroy the QP */
  		cqp_request = nes_get_cqp_request(nesdev);
  		if (cqp_request == NULL) {
  			nes_debug(NES_DBG_QP, "Failed to get a cqp_request.\n");
  			return;
  		}
  		cqp_request->waiting = 0;
  		cqp_request->callback = 1;
  		cqp_request->cqp_callback = nes_cqp_rem_ref_callback;
  		cqp_request->cqp_callback_pointer = nesqp;
  		cqp_wqe = &cqp_request->cqp_wqe;
  
  		nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
  		opcode = NES_CQP_DESTROY_QP | NES_CQP_QP_TYPE_IWARP;
  
  		if (nesqp->hte_added) {
  			opcode  |= NES_CQP_QP_DEL_HTE;
  			nesqp->hte_added = 0;
  		}
  		set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
  		set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
  		u64temp = (u64)nesqp->nesqp_context_pbase;
  		set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
  		nes_post_cqp_request(nesdev, cqp_request);
  	}
  }
  
  
  /**
   * nes_get_qp
   */
  struct ib_qp *nes_get_qp(struct ib_device *device, int qpn)
  {
  	struct nes_vnic *nesvnic = to_nesvnic(device);
  	struct nes_device *nesdev = nesvnic->nesdev;
  	struct nes_adapter *nesadapter = nesdev->nesadapter;
  
  	if ((qpn < NES_FIRST_QPN) || (qpn >= (NES_FIRST_QPN + nesadapter->max_qp)))
  		return NULL;
  
  	return &nesadapter->qp_table[qpn - NES_FIRST_QPN]->ibqp;
  }
  
  
  /**
   * nes_print_macaddr
   */
  static void nes_print_macaddr(struct net_device *netdev)
  {
  	nes_debug(NES_DBG_INIT, "%s: %pM, IRQ %u\n",
  		  netdev->name, netdev->dev_addr, netdev->irq);
  }
  
  /**
   * nes_interrupt - handle interrupts
   */
  static irqreturn_t nes_interrupt(int irq, void *dev_id)
  {
  	struct nes_device *nesdev = (struct nes_device *)dev_id;
  	int handled = 0;
  	u32 int_mask;
  	u32 int_req;
  	u32 int_stat;
  	u32 intf_int_stat;
  	u32 timer_stat;
  
  	if (nesdev->msi_enabled) {
  		/* No need to read the interrupt pending register if msi is enabled */
  		handled = 1;
  	} else {
  		if (unlikely(nesdev->nesadapter->hw_rev == NE020_REV)) {
  			/* Master interrupt enable provides synchronization for kicking off bottom half
  			  when interrupt sharing is going on */
  			int_mask = nes_read32(nesdev->regs + NES_INT_MASK);
  			if (int_mask & 0x80000000) {
  				/* Check interrupt status to see if this might be ours */
  				int_stat = nes_read32(nesdev->regs + NES_INT_STAT);
  				int_req = nesdev->int_req;
  				if (int_stat&int_req) {
  					/* if interesting CEQ or AEQ is pending, claim the interrupt */
  					if ((int_stat&int_req) & (~(NES_INT_TIMER|NES_INT_INTF))) {
  						handled = 1;
  					} else {
  						if (((int_stat & int_req) & NES_INT_TIMER) == NES_INT_TIMER) {
  							/* Timer might be running but might be for another function */
  							timer_stat = nes_read32(nesdev->regs + NES_TIMER_STAT);
  							if ((timer_stat & nesdev->timer_int_req) != 0) {
  								handled = 1;
  							}
  						}
  						if ((((int_stat & int_req) & NES_INT_INTF) == NES_INT_INTF) &&
  								(handled == 0)) {
  							intf_int_stat = nes_read32(nesdev->regs+NES_INTF_INT_STAT);
  							if ((intf_int_stat & nesdev->intf_int_req) != 0) {
  								handled = 1;
  							}
  						}
  					}
  					if (handled) {
  						nes_write32(nesdev->regs+NES_INT_MASK, int_mask & (~0x80000000));
  						int_mask = nes_read32(nesdev->regs+NES_INT_MASK);
  						/* Save off the status to save an additional read */
  						nesdev->int_stat = int_stat;
  						nesdev->napi_isr_ran = 1;
  					}
  				}
  			}
  		} else {
  			handled = nes_read32(nesdev->regs+NES_INT_PENDING);
  		}
  	}
  
  	if (handled) {
  
  		if (nes_napi_isr(nesdev) == 0) {
  			tasklet_schedule(&nesdev->dpc_tasklet);
  
  		}
  		return IRQ_HANDLED;
  	} else {
  		return IRQ_NONE;
  	}
  }
  
  
  /**
   * nes_probe - Device initialization
   */
  static int nes_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
  {
  	struct net_device *netdev = NULL;
  	struct nes_device *nesdev = NULL;
  	int ret = 0;
  	void __iomem *mmio_regs = NULL;
  	u8 hw_rev;
  
  	assert(pcidev != NULL);
  	assert(ent != NULL);
  
  	printk(KERN_INFO PFX "NetEffect RNIC driver v%s loading. (%s)\n",
  			DRV_VERSION, pci_name(pcidev));
  
  	ret = pci_enable_device(pcidev);
  	if (ret) {
  		printk(KERN_ERR PFX "Unable to enable PCI device. (%s)\n", pci_name(pcidev));
  		goto bail0;
  	}
  
  	nes_debug(NES_DBG_INIT, "BAR0 (@0x%08lX) size = 0x%lX bytes\n",
  			(long unsigned int)pci_resource_start(pcidev, BAR_0),
  			(long unsigned int)pci_resource_len(pcidev, BAR_0));
  	nes_debug(NES_DBG_INIT, "BAR1 (@0x%08lX) size = 0x%lX bytes\n",
  			(long unsigned int)pci_resource_start(pcidev, BAR_1),
  			(long unsigned int)pci_resource_len(pcidev, BAR_1));
  
  	/* Make sure PCI base addr are MMIO */
  	if (!(pci_resource_flags(pcidev, BAR_0) & IORESOURCE_MEM) ||
  			!(pci_resource_flags(pcidev, BAR_1) & IORESOURCE_MEM)) {
  		printk(KERN_ERR PFX "PCI regions not an MMIO resource\n");
  		ret = -ENODEV;
  		goto bail1;
  	}
  
  	/* Reserve PCI I/O and memory resources */
  	ret = pci_request_regions(pcidev, DRV_NAME);
  	if (ret) {
  		printk(KERN_ERR PFX "Unable to request regions. (%s)\n", pci_name(pcidev));
  		goto bail1;
  	}
  
  	if ((sizeof(dma_addr_t) > 4)) {
  		ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(64));
  		if (ret < 0) {
  			printk(KERN_ERR PFX "64b DMA mask configuration failed\n");
  			goto bail2;
  		}
  		ret = pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(64));
  		if (ret) {
  			printk(KERN_ERR PFX "64b DMA consistent mask configuration failed\n");
  			goto bail2;
  		}
  	} else {
  		ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32));
  		if (ret < 0) {
  			printk(KERN_ERR PFX "32b DMA mask configuration failed\n");
  			goto bail2;
  		}
  		ret = pci_set_consistent_dma_mask(pcidev, DMA_BIT_MASK(32));
  		if (ret) {
  			printk(KERN_ERR PFX "32b DMA consistent mask configuration failed\n");
  			goto bail2;
  		}
  	}
  
  	pci_set_master(pcidev);
  
  	/* Allocate hardware structure */
  	nesdev = kzalloc(sizeof(struct nes_device), GFP_KERNEL);
  	if (!nesdev) {
  		printk(KERN_ERR PFX "%s: Unable to alloc hardware struct\n", pci_name(pcidev));
  		ret = -ENOMEM;
  		goto bail2;
  	}
  
  	nes_debug(NES_DBG_INIT, "Allocated nes device at %p\n", nesdev);
  	nesdev->pcidev = pcidev;
  	pci_set_drvdata(pcidev, nesdev);
  
  	pci_read_config_byte(pcidev, 0x0008, &hw_rev);
  	nes_debug(NES_DBG_INIT, "hw_rev=%u\n", hw_rev);
  
  	spin_lock_init(&nesdev->indexed_regs_lock);
  
  	/* Remap the PCI registers in adapter BAR0 to kernel VA space */
  	mmio_regs = ioremap_nocache(pci_resource_start(pcidev, BAR_0),
  				    pci_resource_len(pcidev, BAR_0));
  	if (mmio_regs == NULL) {
  		printk(KERN_ERR PFX "Unable to remap BAR0\n");
  		ret = -EIO;
  		goto bail3;
  	}
  	nesdev->regs = mmio_regs;
  	nesdev->index_reg = 0x50 + (PCI_FUNC(pcidev->devfn)*8) + mmio_regs;
  
  	/* Ensure interrupts are disabled */
  	nes_write32(nesdev->regs+NES_INT_MASK, 0x7fffffff);
  
  	if (nes_drv_opt & NES_DRV_OPT_ENABLE_MSI) {
  		if (!pci_enable_msi(nesdev->pcidev)) {
  			nesdev->msi_enabled = 1;
  			nes_debug(NES_DBG_INIT, "MSI is enabled for device %s\n",
  					pci_name(pcidev));
  		} else {
  			nes_debug(NES_DBG_INIT, "MSI is disabled by linux for device %s\n",
  					pci_name(pcidev));
  		}
  	} else {
  		nes_debug(NES_DBG_INIT, "MSI not requested due to driver options for device %s\n",
  				pci_name(pcidev));
  	}
  
  	nesdev->csr_start = pci_resource_start(nesdev->pcidev, BAR_0);
  	nesdev->doorbell_region = pci_resource_start(nesdev->pcidev, BAR_1);
  
  	/* Init the adapter */
  	nesdev->nesadapter = nes_init_adapter(nesdev, hw_rev);
  	if (!nesdev->nesadapter) {
  		printk(KERN_ERR PFX "Unable to initialize adapter.\n");
  		ret = -ENOMEM;
  		goto bail5;
  	}
  	nesdev->nesadapter->et_rx_coalesce_usecs_irq = interrupt_mod_interval;
  	nesdev->nesadapter->wqm_quanta = wqm_quanta;
  
  	/* nesdev->base_doorbell_index =
  			nesdev->nesadapter->pd_config_base[PCI_FUNC(nesdev->pcidev->devfn)]; */
  	nesdev->base_doorbell_index = 1;
  	nesdev->doorbell_start = nesdev->nesadapter->doorbell_start;
  	if (nesdev->nesadapter->phy_type[0] == NES_PHY_TYPE_PUMA_1G) {
  		switch (PCI_FUNC(nesdev->pcidev->devfn) %
  			nesdev->nesadapter->port_count) {
  		case 1:
  			nesdev->mac_index = 2;
  			break;
  		case 2:
  			nesdev->mac_index = 1;
  			break;
  		case 3:
  			nesdev->mac_index = 3;
  			break;
  		case 0:
  		default:
  			nesdev->mac_index = 0;
  		}
  	} else {
  		nesdev->mac_index = PCI_FUNC(nesdev->pcidev->devfn) %
  						nesdev->nesadapter->port_count;
  	}
  
  	if ((limit_maxrdreqsz ||
  	     ((nesdev->nesadapter->phy_type[0] == NES_PHY_TYPE_GLADIUS) &&
  	      (hw_rev == NE020_REV1))) &&
  	    (pcie_get_readrq(pcidev) > 256)) {
  		if (pcie_set_readrq(pcidev, 256))
  			printk(KERN_ERR PFX "Unable to set max read request"
  				" to 256 bytes\n");
  		else
  			nes_debug(NES_DBG_INIT, "Max read request size set"
  				" to 256 bytes\n");
  	}
  
  	tasklet_init(&nesdev->dpc_tasklet, nes_dpc, (unsigned long)nesdev);
  
  	/* bring up the Control QP */
  	if (nes_init_cqp(nesdev)) {
  		ret = -ENODEV;
  		goto bail6;
  	}
  
  	/* Arm the CCQ */
  	nes_write32(nesdev->regs+NES_CQE_ALLOC, NES_CQE_ALLOC_NOTIFY_NEXT |
  			PCI_FUNC(nesdev->pcidev->devfn));
  	nes_read32(nesdev->regs+NES_CQE_ALLOC);
  
  	/* Enable the interrupts */
  	nesdev->int_req = (0x101 << PCI_FUNC(nesdev->pcidev->devfn)) |
  			(1 << (PCI_FUNC(nesdev->pcidev->devfn)+16));
  	if (PCI_FUNC(nesdev->pcidev->devfn) < 4) {
  		nesdev->int_req |= (1 << (PCI_FUNC(nesdev->mac_index)+24));
  	}
  
  	/* TODO: This really should be the first driver to load, not function 0 */
  	if (PCI_FUNC(nesdev->pcidev->devfn) == 0) {
  		/* pick up PCI and critical errors if the first driver to load */
  		nesdev->intf_int_req = NES_INTF_INT_PCIERR | NES_INTF_INT_CRITERR;
  		nesdev->int_req |= NES_INT_INTF;
  	} else {
  		nesdev->intf_int_req = 0;
  	}
  	nesdev->intf_int_req |= (1 << (PCI_FUNC(nesdev->pcidev->devfn)+16));
  	nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS0, 0);
  	nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS1, 0);
  	nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS2, 0x00001265);
  	nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS4, 0x18021804);
  
  	nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS3, 0x17801790);
  
  	/* deal with both periodic and one_shot */
  	nesdev->timer_int_req = 0x101 << PCI_FUNC(nesdev->pcidev->devfn);
  	nesdev->nesadapter->timer_int_req |= nesdev->timer_int_req;
  	nes_debug(NES_DBG_INIT, "setting int_req for function %u, nesdev = 0x%04X, adapter = 0x%04X\n",
  			PCI_FUNC(nesdev->pcidev->devfn),
  			nesdev->timer_int_req, nesdev->nesadapter->timer_int_req);
  
  	nes_write32(nesdev->regs+NES_INTF_INT_MASK, ~(nesdev->intf_int_req));
  
  	list_add_tail(&nesdev->list, &nes_dev_list);
  
  	/* Request an interrupt line for the driver */
  	ret = request_irq(pcidev->irq, nes_interrupt, IRQF_SHARED, DRV_NAME, nesdev);
  	if (ret) {
  		printk(KERN_ERR PFX "%s: requested IRQ %u is busy\n",
  				pci_name(pcidev), pcidev->irq);
  		goto bail65;
  	}
  
  	nes_write32(nesdev->regs+NES_INT_MASK, ~nesdev->int_req);
  
  	if (nes_notifiers_registered == 0) {
  		register_inetaddr_notifier(&nes_inetaddr_notifier);
  		register_netevent_notifier(&nes_net_notifier);
  	}
  	nes_notifiers_registered++;
  
  	INIT_DELAYED_WORK(&nesdev->work, nes_recheck_link_status);
  
  	/* Initialize network devices */
  	netdev = nes_netdev_init(nesdev, mmio_regs);
  	if (netdev == NULL) {
  		ret = -ENOMEM;
  		goto bail7;
  	}
  
  	/* Register network device */
  	ret = register_netdev(netdev);
  	if (ret) {
  		printk(KERN_ERR PFX "Unable to register netdev, ret = %d\n", ret);
  		nes_netdev_destroy(netdev);
  		goto bail7;
  	}
  
  	nes_print_macaddr(netdev);
  
  	nesdev->netdev_count++;
  	nesdev->nesadapter->netdev_count++;
  
  	printk(KERN_INFO PFX "%s: NetEffect RNIC driver successfully loaded.\n",
  			pci_name(pcidev));
  	return 0;
  
  	bail7:
  	printk(KERN_ERR PFX "bail7\n");
  	while (nesdev->netdev_count > 0) {
  		nesdev->netdev_count--;
  		nesdev->nesadapter->netdev_count--;
  
  		unregister_netdev(nesdev->netdev[nesdev->netdev_count]);
  		nes_netdev_destroy(nesdev->netdev[nesdev->netdev_count]);
  	}
  
  	nes_debug(NES_DBG_INIT, "netdev_count=%d, nesadapter->netdev_count=%d\n",
  			nesdev->netdev_count, nesdev->nesadapter->netdev_count);
  
  	nes_notifiers_registered--;
  	if (nes_notifiers_registered == 0) {
  		unregister_netevent_notifier(&nes_net_notifier);
  		unregister_inetaddr_notifier(&nes_inetaddr_notifier);
  	}
  
  	list_del(&nesdev->list);
  	nes_destroy_cqp(nesdev);
  
  	bail65:
  	printk(KERN_ERR PFX "bail65\n");
  	free_irq(pcidev->irq, nesdev);
  	if (nesdev->msi_enabled) {
  		pci_disable_msi(pcidev);
  	}
  	bail6:
  	printk(KERN_ERR PFX "bail6\n");
  	tasklet_kill(&nesdev->dpc_tasklet);
  	/* Deallocate the Adapter Structure */
  	nes_destroy_adapter(nesdev->nesadapter);
  
  	bail5:
  	printk(KERN_ERR PFX "bail5\n");
  	iounmap(nesdev->regs);
  
  	bail3:
  	printk(KERN_ERR PFX "bail3\n");
  	kfree(nesdev);
  
  	bail2:
  	pci_release_regions(pcidev);
  
  	bail1:
  	pci_disable_device(pcidev);
  
  	bail0:
  	return ret;
  }
  
  
  /**
   * nes_remove - unload from kernel
   */
  static void nes_remove(struct pci_dev *pcidev)
  {
  	struct nes_device *nesdev = pci_get_drvdata(pcidev);
  	struct net_device *netdev;
  	int netdev_index = 0;
  	unsigned long flags;
  
  		if (nesdev->netdev_count) {
  			netdev = nesdev->netdev[netdev_index];
  			if (netdev) {
  				netif_stop_queue(netdev);
  				unregister_netdev(netdev);
  				nes_netdev_destroy(netdev);
  
  				nesdev->netdev[netdev_index] = NULL;
  				nesdev->netdev_count--;
  				nesdev->nesadapter->netdev_count--;
  			}
  		}
  
  	nes_notifiers_registered--;
  	if (nes_notifiers_registered == 0) {
  		unregister_netevent_notifier(&nes_net_notifier);
  		unregister_inetaddr_notifier(&nes_inetaddr_notifier);
  	}
  
  	list_del(&nesdev->list);
  	nes_destroy_cqp(nesdev);
  
  	free_irq(pcidev->irq, nesdev);
  	tasklet_kill(&nesdev->dpc_tasklet);
  
  	spin_lock_irqsave(&nesdev->nesadapter->phy_lock, flags);
  	if (nesdev->link_recheck) {
  		spin_unlock_irqrestore(&nesdev->nesadapter->phy_lock, flags);
  		cancel_delayed_work_sync(&nesdev->work);
  	} else {
  		spin_unlock_irqrestore(&nesdev->nesadapter->phy_lock, flags);
  	}
  
  	/* Deallocate the Adapter Structure */
  	nes_destroy_adapter(nesdev->nesadapter);
  
  	if (nesdev->msi_enabled) {
  		pci_disable_msi(pcidev);
  	}
  
  	iounmap(nesdev->regs);
  	kfree(nesdev);
  
  	/* nes_debug(NES_DBG_SHUTDOWN, "calling pci_release_regions.\n"); */
  	pci_release_regions(pcidev);
  	pci_disable_device(pcidev);
  	pci_set_drvdata(pcidev, NULL);
  }
  
  
  static struct pci_driver nes_pci_driver = {
  	.name = DRV_NAME,
  	.id_table = nes_pci_table,
  	.probe = nes_probe,
  	.remove = nes_remove,
  };
  
  static ssize_t nes_show_adapter(struct device_driver *ddp, char *buf)
  {
  	unsigned int  devfn = 0xffffffff;
  	unsigned char bus_number = 0xff;
  	unsigned int  i = 0;
  	struct nes_device *nesdev;
  
  	list_for_each_entry(nesdev, &nes_dev_list, list) {
  		if (i == ee_flsh_adapter) {
  			devfn = nesdev->pcidev->devfn;
  			bus_number = nesdev->pcidev->bus->number;
  			break;
  		}
  		i++;
  	}
  
  	return snprintf(buf, PAGE_SIZE, "%x:%x\n", bus_number, devfn);
  }
  
  static ssize_t nes_store_adapter(struct device_driver *ddp,
  	const char *buf, size_t count)
  {
  	char *p = (char *)buf;
  
  	ee_flsh_adapter = simple_strtoul(p, &p, 10);
  	return strnlen(buf, count);
  }
  
  static ssize_t nes_show_ee_cmd(struct device_driver *ddp, char *buf)
  {
  	u32 eeprom_cmd = 0xdead;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	list_for_each_entry(nesdev, &nes_dev_list, list) {
  		if (i == ee_flsh_adapter) {
  			eeprom_cmd = nes_read32(nesdev->regs + NES_EEPROM_COMMAND);
  			break;
  		}
  		i++;
  	}
  	return snprintf(buf, PAGE_SIZE, "0x%x\n", eeprom_cmd);
  }
  
  static ssize_t nes_store_ee_cmd(struct device_driver *ddp,
  	const char *buf, size_t count)
  {
  	char *p = (char *)buf;
  	u32 val;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
  		val = simple_strtoul(p, &p, 16);
  		list_for_each_entry(nesdev, &nes_dev_list, list) {
  			if (i == ee_flsh_adapter) {
  				nes_write32(nesdev->regs + NES_EEPROM_COMMAND, val);
  				break;
  			}
  			i++;
  		}
  	}
  	return strnlen(buf, count);
  }
  
  static ssize_t nes_show_ee_data(struct device_driver *ddp, char *buf)
  {
  	u32 eeprom_data = 0xdead;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	list_for_each_entry(nesdev, &nes_dev_list, list) {
  		if (i == ee_flsh_adapter) {
  			eeprom_data = nes_read32(nesdev->regs + NES_EEPROM_DATA);
  			break;
  		}
  		i++;
  	}
  
  	return  snprintf(buf, PAGE_SIZE, "0x%x\n", eeprom_data);
  }
  
  static ssize_t nes_store_ee_data(struct device_driver *ddp,
  	const char *buf, size_t count)
  {
  	char *p = (char *)buf;
  	u32 val;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
  		val = simple_strtoul(p, &p, 16);
  		list_for_each_entry(nesdev, &nes_dev_list, list) {
  			if (i == ee_flsh_adapter) {
  				nes_write32(nesdev->regs + NES_EEPROM_DATA, val);
  				break;
  			}
  			i++;
  		}
  	}
  	return strnlen(buf, count);
  }
  
  static ssize_t nes_show_flash_cmd(struct device_driver *ddp, char *buf)
  {
  	u32 flash_cmd = 0xdead;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	list_for_each_entry(nesdev, &nes_dev_list, list) {
  		if (i == ee_flsh_adapter) {
  			flash_cmd = nes_read32(nesdev->regs + NES_FLASH_COMMAND);
  			break;
  		}
  		i++;
  	}
  
  	return  snprintf(buf, PAGE_SIZE, "0x%x\n", flash_cmd);
  }
  
  static ssize_t nes_store_flash_cmd(struct device_driver *ddp,
  	const char *buf, size_t count)
  {
  	char *p = (char *)buf;
  	u32 val;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
  		val = simple_strtoul(p, &p, 16);
  		list_for_each_entry(nesdev, &nes_dev_list, list) {
  			if (i == ee_flsh_adapter) {
  				nes_write32(nesdev->regs + NES_FLASH_COMMAND, val);
  				break;
  			}
  			i++;
  		}
  	}
  	return strnlen(buf, count);
  }
  
  static ssize_t nes_show_flash_data(struct device_driver *ddp, char *buf)
  {
  	u32 flash_data = 0xdead;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	list_for_each_entry(nesdev, &nes_dev_list, list) {
  		if (i == ee_flsh_adapter) {
  			flash_data = nes_read32(nesdev->regs + NES_FLASH_DATA);
  			break;
  		}
  		i++;
  	}
  
  	return  snprintf(buf, PAGE_SIZE, "0x%x\n", flash_data);
  }
  
  static ssize_t nes_store_flash_data(struct device_driver *ddp,
  	const char *buf, size_t count)
  {
  	char *p = (char *)buf;
  	u32 val;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
  		val = simple_strtoul(p, &p, 16);
  		list_for_each_entry(nesdev, &nes_dev_list, list) {
  			if (i == ee_flsh_adapter) {
  				nes_write32(nesdev->regs + NES_FLASH_DATA, val);
  				break;
  			}
  			i++;
  		}
  	}
  	return strnlen(buf, count);
  }
  
  static ssize_t nes_show_nonidx_addr(struct device_driver *ddp, char *buf)
  {
  	return  snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_nonidx_addr);
  }
  
  static ssize_t nes_store_nonidx_addr(struct device_driver *ddp,
  	const char *buf, size_t count)
  {
  	char *p = (char *)buf;
  
  	if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X')
  		sysfs_nonidx_addr = simple_strtoul(p, &p, 16);
  
  	return strnlen(buf, count);
  }
  
  static ssize_t nes_show_nonidx_data(struct device_driver *ddp, char *buf)
  {
  	u32 nonidx_data = 0xdead;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	list_for_each_entry(nesdev, &nes_dev_list, list) {
  		if (i == ee_flsh_adapter) {
  			nonidx_data = nes_read32(nesdev->regs + sysfs_nonidx_addr);
  			break;
  		}
  		i++;
  	}
  
  	return  snprintf(buf, PAGE_SIZE, "0x%x\n", nonidx_data);
  }
  
  static ssize_t nes_store_nonidx_data(struct device_driver *ddp,
  	const char *buf, size_t count)
  {
  	char *p = (char *)buf;
  	u32 val;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
  		val = simple_strtoul(p, &p, 16);
  		list_for_each_entry(nesdev, &nes_dev_list, list) {
  			if (i == ee_flsh_adapter) {
  				nes_write32(nesdev->regs + sysfs_nonidx_addr, val);
  				break;
  			}
  			i++;
  		}
  	}
  	return strnlen(buf, count);
  }
  
  static ssize_t nes_show_idx_addr(struct device_driver *ddp, char *buf)
  {
  	return  snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_idx_addr);
  }
  
  static ssize_t nes_store_idx_addr(struct device_driver *ddp,
  	const char *buf, size_t count)
  {
  	char *p = (char *)buf;
  
  	if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X')
  		sysfs_idx_addr = simple_strtoul(p, &p, 16);
  
  	return strnlen(buf, count);
  }
  
  static ssize_t nes_show_idx_data(struct device_driver *ddp, char *buf)
  {
  	u32 idx_data = 0xdead;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	list_for_each_entry(nesdev, &nes_dev_list, list) {
  		if (i == ee_flsh_adapter) {
  			idx_data = nes_read_indexed(nesdev, sysfs_idx_addr);
  			break;
  		}
  		i++;
  	}
  
  	return  snprintf(buf, PAGE_SIZE, "0x%x\n", idx_data);
  }
  
  static ssize_t nes_store_idx_data(struct device_driver *ddp,
  	const char *buf, size_t count)
  {
  	char *p = (char *)buf;
  	u32 val;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
  		val = simple_strtoul(p, &p, 16);
  		list_for_each_entry(nesdev, &nes_dev_list, list) {
  			if (i == ee_flsh_adapter) {
  				nes_write_indexed(nesdev, sysfs_idx_addr, val);
  				break;
  			}
  			i++;
  		}
  	}
  	return strnlen(buf, count);
  }
  
  
  /**
   * nes_show_wqm_quanta
   */
  static ssize_t nes_show_wqm_quanta(struct device_driver *ddp, char *buf)
  {
  	u32 wqm_quanta_value = 0xdead;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	list_for_each_entry(nesdev, &nes_dev_list, list) {
  		if (i == ee_flsh_adapter) {
  			wqm_quanta_value = nesdev->nesadapter->wqm_quanta;
  			break;
  		}
  		i++;
  	}
  
  	return  snprintf(buf, PAGE_SIZE, "0x%X\n", wqm_quanta_value);
  }
  
  
  /**
   * nes_store_wqm_quanta
   */
  static ssize_t nes_store_wqm_quanta(struct device_driver *ddp,
  					const char *buf, size_t count)
  {
  	unsigned long wqm_quanta_value;
  	u32 wqm_config1;
  	u32 i = 0;
  	struct nes_device *nesdev;
  
  	if (kstrtoul(buf, 0, &wqm_quanta_value) < 0)
  		return -EINVAL;
  
  	list_for_each_entry(nesdev, &nes_dev_list, list) {
  		if (i == ee_flsh_adapter) {
  			nesdev->nesadapter->wqm_quanta = wqm_quanta_value;
  			wqm_config1 = nes_read_indexed(nesdev,
  						NES_IDX_WQM_CONFIG1);
  			nes_write_indexed(nesdev, NES_IDX_WQM_CONFIG1,
  					((wqm_quanta_value << 1) |
  					(wqm_config1 & 0x00000001)));
  			break;
  		}
  		i++;
  	}
  	return strnlen(buf, count);
  }
  
  static DRIVER_ATTR(adapter, S_IRUSR | S_IWUSR,
  		   nes_show_adapter, nes_store_adapter);
  static DRIVER_ATTR(eeprom_cmd, S_IRUSR | S_IWUSR,
  		   nes_show_ee_cmd, nes_store_ee_cmd);
  static DRIVER_ATTR(eeprom_data, S_IRUSR | S_IWUSR,
  		   nes_show_ee_data, nes_store_ee_data);
  static DRIVER_ATTR(flash_cmd, S_IRUSR | S_IWUSR,
  		   nes_show_flash_cmd, nes_store_flash_cmd);
  static DRIVER_ATTR(flash_data, S_IRUSR | S_IWUSR,
  		   nes_show_flash_data, nes_store_flash_data);
  static DRIVER_ATTR(nonidx_addr, S_IRUSR | S_IWUSR,
  		   nes_show_nonidx_addr, nes_store_nonidx_addr);
  static DRIVER_ATTR(nonidx_data, S_IRUSR | S_IWUSR,
  		   nes_show_nonidx_data, nes_store_nonidx_data);
  static DRIVER_ATTR(idx_addr, S_IRUSR | S_IWUSR,
  		   nes_show_idx_addr, nes_store_idx_addr);
  static DRIVER_ATTR(idx_data, S_IRUSR | S_IWUSR,
  		   nes_show_idx_data, nes_store_idx_data);
  static DRIVER_ATTR(wqm_quanta, S_IRUSR | S_IWUSR,
  		   nes_show_wqm_quanta, nes_store_wqm_quanta);
  
  static int nes_create_driver_sysfs(struct pci_driver *drv)
  {
  	int error;
  	error  = driver_create_file(&drv->driver, &driver_attr_adapter);
  	error |= driver_create_file(&drv->driver, &driver_attr_eeprom_cmd);
  	error |= driver_create_file(&drv->driver, &driver_attr_eeprom_data);
  	error |= driver_create_file(&drv->driver, &driver_attr_flash_cmd);
  	error |= driver_create_file(&drv->driver, &driver_attr_flash_data);
  	error |= driver_create_file(&drv->driver, &driver_attr_nonidx_addr);
  	error |= driver_create_file(&drv->driver, &driver_attr_nonidx_data);
  	error |= driver_create_file(&drv->driver, &driver_attr_idx_addr);
  	error |= driver_create_file(&drv->driver, &driver_attr_idx_data);
  	error |= driver_create_file(&drv->driver, &driver_attr_wqm_quanta);
  	return error;
  }
  
  static void nes_remove_driver_sysfs(struct pci_driver *drv)
  {
  	driver_remove_file(&drv->driver, &driver_attr_adapter);
  	driver_remove_file(&drv->driver, &driver_attr_eeprom_cmd);
  	driver_remove_file(&drv->driver, &driver_attr_eeprom_data);
  	driver_remove_file(&drv->driver, &driver_attr_flash_cmd);
  	driver_remove_file(&drv->driver, &driver_attr_flash_data);
  	driver_remove_file(&drv->driver, &driver_attr_nonidx_addr);
  	driver_remove_file(&drv->driver, &driver_attr_nonidx_data);
  	driver_remove_file(&drv->driver, &driver_attr_idx_addr);
  	driver_remove_file(&drv->driver, &driver_attr_idx_data);
  	driver_remove_file(&drv->driver, &driver_attr_wqm_quanta);
  }
  
  /**
   * nes_init_module - module initialization entry point
   */
  static int __init nes_init_module(void)
  {
  	int retval;
  	int retval1;
  
  	retval = nes_cm_start();
  	if (retval) {
  		printk(KERN_ERR PFX "Unable to start NetEffect iWARP CM.\n");
  		return retval;
  	}
  	retval = pci_register_driver(&nes_pci_driver);
  	if (retval >= 0) {
  		retval1 = nes_create_driver_sysfs(&nes_pci_driver);
  		if (retval1 < 0)
  			printk(KERN_ERR PFX "Unable to create NetEffect sys files.\n");
  	}
  	return retval;
  }
  
  
  /**
   * nes_exit_module - module unload entry point
   */
  static void __exit nes_exit_module(void)
  {
  	nes_cm_stop();
  	nes_remove_driver_sysfs(&nes_pci_driver);
  
  	pci_unregister_driver(&nes_pci_driver);
  }
  
  
  module_init(nes_init_module);
  module_exit(nes_exit_module);
  