text: /*
   * QLogic iSCSI HBA Driver
   * Copyright (c)  2003-2006 QLogic Corporation
   *
   * See LICENSE.qla4xxx for copyright and licensing details.
   */
  
  #include "ql4_def.h"
  #include "ql4_glbl.h"
  #include "ql4_dbg.h"
  #include "ql4_inline.h"
  
  
  /**
   * qla4xxx_mailbox_command - issues mailbox commands
   * @ha: Pointer to host adapter structure.
   * @inCount: number of mailbox registers to load.
   * @outCount: number of mailbox registers to return.
   * @mbx_cmd: data pointer for mailbox in registers.
   * @mbx_sts: data pointer for mailbox out registers.
   *
   * This routine sssue mailbox commands and waits for completion.
   * If outCount is 0, this routine completes successfully WITHOUT waiting
   * for the mailbox command to complete.
   **/
  static int qla4xxx_mailbox_command(struct scsi_qla_host *ha, uint8_t inCount,
  				   uint8_t outCount, uint32_t *mbx_cmd,
  				   uint32_t *mbx_sts)
  {
  	int status = QLA_ERROR;
  	uint8_t i;
  	u_long wait_count;
  	uint32_t intr_status;
  	unsigned long flags = 0;
  
  	/* Make sure that pointers are valid */
  	if (!mbx_cmd || !mbx_sts) {
  		DEBUG2(printk("scsi%ld: %s: Invalid mbx_cmd or mbx_sts "
  			      "pointer\n", ha->host_no, __func__));
  		return status;
  	}
  	/* Mailbox code active */
  	wait_count = MBOX_TOV * 100;
  
  	while (wait_count--) {
  		mutex_lock(&ha->mbox_sem);
  		if (!test_bit(AF_MBOX_COMMAND, &ha->flags)) {
  			set_bit(AF_MBOX_COMMAND, &ha->flags);
  			mutex_unlock(&ha->mbox_sem);
  			break;
  		}
  		mutex_unlock(&ha->mbox_sem);
  		if (!wait_count) {
  			DEBUG2(printk("scsi%ld: %s: mbox_sem failed\n",
  				ha->host_no, __func__));
  			return status;
  		}
  		msleep(10);
  	}
  
  	/* To prevent overwriting mailbox registers for a command that has
  	 * not yet been serviced, check to see if a previously issued
  	 * mailbox command is interrupting.
  	 * -----------------------------------------------------------------
  	 */
  	spin_lock_irqsave(&ha->hardware_lock, flags);
  	intr_status = readl(&ha->reg->ctrl_status);
  	if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
  		/* Service existing interrupt */
  		qla4xxx_interrupt_service_routine(ha, intr_status);
  		clear_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
  	}
  
  	/* Send the mailbox command to the firmware */
  	ha->mbox_status_count = outCount;
  	for (i = 0; i < outCount; i++)
  		ha->mbox_status[i] = 0;
  
  	/* Load all mailbox registers, except mailbox 0. */
  	for (i = 1; i < inCount; i++)
  		writel(mbx_cmd[i], &ha->reg->mailbox[i]);
  
  	/* Wakeup firmware  */
  	writel(mbx_cmd[0], &ha->reg->mailbox[0]);
  	readl(&ha->reg->mailbox[0]);
  	writel(set_rmask(CSR_INTR_RISC), &ha->reg->ctrl_status);
  	readl(&ha->reg->ctrl_status);
  	spin_unlock_irqrestore(&ha->hardware_lock, flags);
  
  	/* Wait for completion */
  
  	/*
  	 * If we don't want status, don't wait for the mailbox command to
  	 * complete.  For example, MBOX_CMD_RESET_FW doesn't return status,
  	 * you must poll the inbound Interrupt Mask for completion.
  	 */
  	if (outCount == 0) {
  		status = QLA_SUCCESS;
  		goto mbox_exit;
  	}
  	/* Wait for command to complete */
  	wait_count = jiffies + MBOX_TOV * HZ;
  	while (test_bit(AF_MBOX_COMMAND_DONE, &ha->flags) == 0) {
  		if (time_after_eq(jiffies, wait_count))
  			break;
  
  		spin_lock_irqsave(&ha->hardware_lock, flags);
  		intr_status = readl(&ha->reg->ctrl_status);
  		if (intr_status & INTR_PENDING) {
  			/*
  			 * Service the interrupt.
  			 * The ISR will save the mailbox status registers
  			 * to a temporary storage location in the adapter
  			 * structure.
  			 */
  			ha->mbox_status_count = outCount;
  			qla4xxx_interrupt_service_routine(ha, intr_status);
  		}
  		spin_unlock_irqrestore(&ha->hardware_lock, flags);
  		msleep(10);
  	}
  
  	/* Check for mailbox timeout. */
  	if (!test_bit(AF_MBOX_COMMAND_DONE, &ha->flags)) {
  		DEBUG2(printk("scsi%ld: Mailbox Cmd 0x%08X timed out ...,"
  			      " Scheduling Adapter Reset\n", ha->host_no,
  			      mbx_cmd[0]));
  		ha->mailbox_timeout_count++;
  		mbx_sts[0] = (-1);
  		set_bit(DPC_RESET_HA, &ha->dpc_flags);
  		goto mbox_exit;
  	}
  
  	/*
  	 * Copy the mailbox out registers to the caller's mailbox in/out
  	 * structure.
  	 */
  	spin_lock_irqsave(&ha->hardware_lock, flags);
  	for (i = 0; i < outCount; i++)
  		mbx_sts[i] = ha->mbox_status[i];
  
  	/* Set return status and error flags (if applicable). */
  	switch (ha->mbox_status[0]) {
  	case MBOX_STS_COMMAND_COMPLETE:
  		status = QLA_SUCCESS;
  		break;
  
  	case MBOX_STS_INTERMEDIATE_COMPLETION:
  		status = QLA_SUCCESS;
  		break;
  
  	case MBOX_STS_BUSY:
  		DEBUG2( printk("scsi%ld: %s: Cmd = %08X, ISP BUSY\n",
  			       ha->host_no, __func__, mbx_cmd[0]));
  		ha->mailbox_timeout_count++;
  		break;
  
  	default:
  		DEBUG2(printk("scsi%ld: %s: **** FAILED, cmd = %08X, "
  			      "sts = %08X ****\n", ha->host_no, __func__,
  			      mbx_cmd[0], mbx_sts[0]));
  		break;
  	}
  	spin_unlock_irqrestore(&ha->hardware_lock, flags);
  
  mbox_exit:
  	mutex_lock(&ha->mbox_sem);
  	clear_bit(AF_MBOX_COMMAND, &ha->flags);
  	mutex_unlock(&ha->mbox_sem);
  	clear_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
  
  	return status;
  }
  
  /**
   * qla4xxx_initialize_fw_cb - initializes firmware control block.
   * @ha: Pointer to host adapter structure.
   **/
  int qla4xxx_initialize_fw_cb(struct scsi_qla_host * ha)
  {
  	struct init_fw_ctrl_blk *init_fw_cb;
  	dma_addr_t init_fw_cb_dma;
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  	int status = QLA_ERROR;
  
  	init_fw_cb = dma_alloc_coherent(&ha->pdev->dev,
  					sizeof(struct init_fw_ctrl_blk),
  					&init_fw_cb_dma, GFP_KERNEL);
  	if (init_fw_cb == NULL) {
  		DEBUG2(printk("scsi%ld: %s: Unable to alloc init_cb\n",
  			      ha->host_no, __func__));
  		return 10;
  	}
  	memset(init_fw_cb, 0, sizeof(struct init_fw_ctrl_blk));
  
  	/* Get Initialize Firmware Control Block. */
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	mbox_cmd[0] = MBOX_CMD_GET_INIT_FW_CTRL_BLOCK;
  	mbox_cmd[2] = LSDW(init_fw_cb_dma);
  	mbox_cmd[3] = MSDW(init_fw_cb_dma);
  	mbox_cmd[4] = sizeof(struct init_fw_ctrl_blk);
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS) {
  		dma_free_coherent(&ha->pdev->dev,
  				  sizeof(struct init_fw_ctrl_blk),
  				  init_fw_cb, init_fw_cb_dma);
  		return status;
  	}
  
  	/* Initialize request and response queues. */
  	qla4xxx_init_rings(ha);
  
  	/* Fill in the request and response queue information. */
  	init_fw_cb->pri.rqq_consumer_idx = cpu_to_le16(ha->request_out);
  	init_fw_cb->pri.compq_producer_idx = cpu_to_le16(ha->response_in);
  	init_fw_cb->pri.rqq_len = __constant_cpu_to_le16(REQUEST_QUEUE_DEPTH);
  	init_fw_cb->pri.compq_len = __constant_cpu_to_le16(RESPONSE_QUEUE_DEPTH);
  	init_fw_cb->pri.rqq_addr_lo = cpu_to_le32(LSDW(ha->request_dma));
  	init_fw_cb->pri.rqq_addr_hi = cpu_to_le32(MSDW(ha->request_dma));
  	init_fw_cb->pri.compq_addr_lo = cpu_to_le32(LSDW(ha->response_dma));
  	init_fw_cb->pri.compq_addr_hi = cpu_to_le32(MSDW(ha->response_dma));
  	init_fw_cb->pri.shdwreg_addr_lo =
  		cpu_to_le32(LSDW(ha->shadow_regs_dma));
  	init_fw_cb->pri.shdwreg_addr_hi =
  		cpu_to_le32(MSDW(ha->shadow_regs_dma));
  
  	/* Set up required options. */
  	init_fw_cb->pri.fw_options |=
  		__constant_cpu_to_le16(FWOPT_SESSION_MODE |
  				       FWOPT_INITIATOR_MODE);
  	init_fw_cb->pri.fw_options &= __constant_cpu_to_le16(~FWOPT_TARGET_MODE);
  
  	/* Save some info in adapter structure. */
  	ha->firmware_options = le16_to_cpu(init_fw_cb->pri.fw_options);
  	ha->tcp_options = le16_to_cpu(init_fw_cb->pri.ipv4_tcp_opts);
  	ha->heartbeat_interval = init_fw_cb->pri.hb_interval;
  	memcpy(ha->ip_address, init_fw_cb->pri.ipv4_addr,
  	       min(sizeof(ha->ip_address), sizeof(init_fw_cb->pri.ipv4_addr)));
  	memcpy(ha->subnet_mask, init_fw_cb->pri.ipv4_subnet,
  	       min(sizeof(ha->subnet_mask), sizeof(init_fw_cb->pri.ipv4_subnet)));
  	memcpy(ha->gateway, init_fw_cb->pri.ipv4_gw_addr,
  	       min(sizeof(ha->gateway), sizeof(init_fw_cb->pri.ipv4_gw_addr)));
  	memcpy(ha->name_string, init_fw_cb->pri.iscsi_name,
  	       min(sizeof(ha->name_string),
  		   sizeof(init_fw_cb->pri.iscsi_name)));
  	/*memcpy(ha->alias, init_fw_cb->Alias,
  	       min(sizeof(ha->alias), sizeof(init_fw_cb->Alias)));*/
  
  	/* Save Command Line Paramater info */
  	ha->port_down_retry_count = le16_to_cpu(init_fw_cb->pri.conn_ka_timeout);
  	ha->discovery_wait = ql4xdiscoverywait;
  
  	/* Send Initialize Firmware Control Block. */
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	mbox_cmd[0] = MBOX_CMD_INITIALIZE_FIRMWARE;
  	mbox_cmd[1] = 0;
  	mbox_cmd[2] = LSDW(init_fw_cb_dma);
  	mbox_cmd[3] = MSDW(init_fw_cb_dma);
  	mbox_cmd[4] = sizeof(struct init_fw_ctrl_blk);
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0], &mbox_sts[0]) ==
  	    QLA_SUCCESS)
  		status = QLA_SUCCESS;
  	 else {
  		DEBUG2(printk("scsi%ld: %s: MBOX_CMD_INITIALIZE_FIRMWARE "
  			      "failed w/ status %04X\n", ha->host_no, __func__,
  			      mbox_sts[0]));
  	}
  	dma_free_coherent(&ha->pdev->dev, sizeof(struct init_fw_ctrl_blk),
  			  init_fw_cb, init_fw_cb_dma);
  
  	return status;
  }
  
  /**
   * qla4xxx_get_dhcp_ip_address - gets HBA ip address via DHCP
   * @ha: Pointer to host adapter structure.
   **/
  int qla4xxx_get_dhcp_ip_address(struct scsi_qla_host * ha)
  {
  	struct init_fw_ctrl_blk *init_fw_cb;
  	dma_addr_t init_fw_cb_dma;
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  
  	init_fw_cb = dma_alloc_coherent(&ha->pdev->dev,
  					sizeof(struct init_fw_ctrl_blk),
  					&init_fw_cb_dma, GFP_KERNEL);
  	if (init_fw_cb == NULL) {
  		printk("scsi%ld: %s: Unable to alloc init_cb\n", ha->host_no,
  		       __func__);
  		return 10;
  	}
  
  	/* Get Initialize Firmware Control Block. */
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	memset(init_fw_cb, 0, sizeof(struct init_fw_ctrl_blk));
  	mbox_cmd[0] = MBOX_CMD_GET_INIT_FW_CTRL_BLOCK;
  	mbox_cmd[2] = LSDW(init_fw_cb_dma);
  	mbox_cmd[3] = MSDW(init_fw_cb_dma);
  	mbox_cmd[4] = sizeof(struct init_fw_ctrl_blk);
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS) {
  		DEBUG2(printk("scsi%ld: %s: Failed to get init_fw_ctrl_blk\n",
  			      ha->host_no, __func__));
  		dma_free_coherent(&ha->pdev->dev,
  				  sizeof(struct init_fw_ctrl_blk),
  				  init_fw_cb, init_fw_cb_dma);
  		return QLA_ERROR;
  	}
  
  	/* Save IP Address. */
  	memcpy(ha->ip_address, init_fw_cb->pri.ipv4_addr,
  	       min(sizeof(ha->ip_address), sizeof(init_fw_cb->pri.ipv4_addr)));
  	memcpy(ha->subnet_mask, init_fw_cb->pri.ipv4_subnet,
  	       min(sizeof(ha->subnet_mask), sizeof(init_fw_cb->pri.ipv4_subnet)));
  	memcpy(ha->gateway, init_fw_cb->pri.ipv4_gw_addr,
  	       min(sizeof(ha->gateway), sizeof(init_fw_cb->pri.ipv4_gw_addr)));
  
  	dma_free_coherent(&ha->pdev->dev, sizeof(struct init_fw_ctrl_blk),
  			  init_fw_cb, init_fw_cb_dma);
  
  	return QLA_SUCCESS;
  }
  
  /**
   * qla4xxx_get_firmware_state - gets firmware state of HBA
   * @ha: Pointer to host adapter structure.
   **/
  int qla4xxx_get_firmware_state(struct scsi_qla_host * ha)
  {
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  
  	/* Get firmware version */
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	mbox_cmd[0] = MBOX_CMD_GET_FW_STATE;
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 4, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS) {
  		DEBUG2(printk("scsi%ld: %s: MBOX_CMD_GET_FW_STATE failed w/ "
  			      "status %04X\n", ha->host_no, __func__,
  			      mbox_sts[0]));
  		return QLA_ERROR;
  	}
  	ha->firmware_state = mbox_sts[1];
  	ha->board_id = mbox_sts[2];
  	ha->addl_fw_state = mbox_sts[3];
  	DEBUG2(printk("scsi%ld: %s firmware_state=0x%x\n",
  		      ha->host_no, __func__, ha->firmware_state);)
  
  		return QLA_SUCCESS;
  }
  
  /**
   * qla4xxx_get_firmware_status - retrieves firmware status
   * @ha: Pointer to host adapter structure.
   **/
  int qla4xxx_get_firmware_status(struct scsi_qla_host * ha)
  {
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  
  	/* Get firmware version */
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	mbox_cmd[0] = MBOX_CMD_GET_FW_STATUS;
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 3, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS) {
  		DEBUG2(printk("scsi%ld: %s: MBOX_CMD_GET_FW_STATUS failed w/ "
  			      "status %04X\n", ha->host_no, __func__,
  			      mbox_sts[0]));
  		return QLA_ERROR;
  	}
  
  	/* High-water mark of IOCBs */
  	ha->iocb_hiwat = mbox_sts[2];
  	if (ha->iocb_hiwat > IOCB_HIWAT_CUSHION)
  		ha->iocb_hiwat -= IOCB_HIWAT_CUSHION;
  	else
  		dev_info(&ha->pdev->dev, "WARNING!!!  You have less than %d "
  			   "firmare IOCBs available (%d).\n",
  			   IOCB_HIWAT_CUSHION, ha->iocb_hiwat);
  
  	return QLA_SUCCESS;
  }
  
  /**
   * qla4xxx_get_fwddb_entry - retrieves firmware ddb entry
   * @ha: Pointer to host adapter structure.
   * @fw_ddb_index: Firmware's device database index
   * @fw_ddb_entry: Pointer to firmware's device database entry structure
   * @num_valid_ddb_entries: Pointer to number of valid ddb entries
   * @next_ddb_index: Pointer to next valid device database index
   * @fw_ddb_device_state: Pointer to device state
   **/
  int qla4xxx_get_fwddb_entry(struct scsi_qla_host *ha,
  			    uint16_t fw_ddb_index,
  			    struct dev_db_entry *fw_ddb_entry,
  			    dma_addr_t fw_ddb_entry_dma,
  			    uint32_t *num_valid_ddb_entries,
  			    uint32_t *next_ddb_index,
  			    uint32_t *fw_ddb_device_state,
  			    uint32_t *conn_err_detail,
  			    uint16_t *tcp_source_port_num,
  			    uint16_t *connection_id)
  {
  	int status = QLA_ERROR;
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  
  	/* Make sure the device index is valid */
  	if (fw_ddb_index >= MAX_DDB_ENTRIES) {
  		DEBUG2(printk("scsi%ld: %s: index [%d] out of range.\n",
  			      ha->host_no, __func__, fw_ddb_index));
  		goto exit_get_fwddb;
  	}
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	mbox_cmd[0] = MBOX_CMD_GET_DATABASE_ENTRY;
  	mbox_cmd[1] = (uint32_t) fw_ddb_index;
  	mbox_cmd[2] = LSDW(fw_ddb_entry_dma);
  	mbox_cmd[3] = MSDW(fw_ddb_entry_dma);
  	mbox_cmd[4] = sizeof(struct dev_db_entry);
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 7, &mbox_cmd[0], &mbox_sts[0]) ==
  	    QLA_ERROR) {
  		DEBUG2(printk("scsi%ld: %s: MBOX_CMD_GET_DATABASE_ENTRY failed"
  			      " with status 0x%04X\n", ha->host_no, __func__,
  			      mbox_sts[0]));
  		goto exit_get_fwddb;
  	}
  	if (fw_ddb_index != mbox_sts[1]) {
  		DEBUG2(printk("scsi%ld: %s: index mismatch [%d] != [%d].\n",
  			      ha->host_no, __func__, fw_ddb_index,
  			      mbox_sts[1]));
  		goto exit_get_fwddb;
  	}
  	if (fw_ddb_entry) {
  		dev_info(&ha->pdev->dev, "DDB[%d] MB0 %04x Tot %d Next %d "
  			   "State %04x ConnErr %08x %d.%d.%d.%d:%04d \"%s\"\n",
  			   fw_ddb_index, mbox_sts[0], mbox_sts[2], mbox_sts[3],
  			   mbox_sts[4], mbox_sts[5], fw_ddb_entry->ip_addr[0],
  			   fw_ddb_entry->ip_addr[1], fw_ddb_entry->ip_addr[2],
  			   fw_ddb_entry->ip_addr[3],
  			   le16_to_cpu(fw_ddb_entry->port),
  			   fw_ddb_entry->iscsi_name);
  	}
  	if (num_valid_ddb_entries)
  		*num_valid_ddb_entries = mbox_sts[2];
  	if (next_ddb_index)
  		*next_ddb_index = mbox_sts[3];
  	if (fw_ddb_device_state)
  		*fw_ddb_device_state = mbox_sts[4];
  
  	/*
  	 * RA: This mailbox has been changed to pass connection error and
  	 * details.  Its true for ISP4010 as per Version E - Not sure when it
  	 * was changed.	 Get the time2wait from the fw_dd_entry field :
  	 * default_time2wait which we call it as minTime2Wait DEV_DB_ENTRY
  	 * struct.
  	 */
  	if (conn_err_detail)
  		*conn_err_detail = mbox_sts[5];
  	if (tcp_source_port_num)
  		*tcp_source_port_num = (uint16_t) mbox_sts[6] >> 16;
  	if (connection_id)
  		*connection_id = (uint16_t) mbox_sts[6] & 0x00FF;
  	status = QLA_SUCCESS;
  
  exit_get_fwddb:
  	return status;
  }
  
  /**
   * qla4xxx_set_fwddb_entry - sets a ddb entry.
   * @ha: Pointer to host adapter structure.
   * @fw_ddb_index: Firmware's device database index
   * @fw_ddb_entry: Pointer to firmware's ddb entry structure, or NULL.
   *
   * This routine initializes or updates the adapter's device database
   * entry for the specified device. It also triggers a login for the
   * specified device. Therefore, it may also be used as a secondary
   * login routine when a NULL pointer is specified for the fw_ddb_entry.
   **/
  int qla4xxx_set_ddb_entry(struct scsi_qla_host * ha, uint16_t fw_ddb_index,
  			  dma_addr_t fw_ddb_entry_dma)
  {
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  
  	/* Do not wait for completion. The firmware will send us an
  	 * ASTS_DATABASE_CHANGED (0x8014) to notify us of the login status.
  	 */
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	mbox_cmd[0] = MBOX_CMD_SET_DATABASE_ENTRY;
  	mbox_cmd[1] = (uint32_t) fw_ddb_index;
  	mbox_cmd[2] = LSDW(fw_ddb_entry_dma);
  	mbox_cmd[3] = MSDW(fw_ddb_entry_dma);
  	mbox_cmd[4] = sizeof(struct dev_db_entry);
  
  	return qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0], &mbox_sts[0]);
  }
  
  /**
   * qla4xxx_get_crash_record - retrieves crash record.
   * @ha: Pointer to host adapter structure.
   *
   * This routine retrieves a crash record from the QLA4010 after an 8002h aen.
   **/
  void qla4xxx_get_crash_record(struct scsi_qla_host * ha)
  {
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  	struct crash_record *crash_record = NULL;
  	dma_addr_t crash_record_dma = 0;
  	uint32_t crash_record_size = 0;
  
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_cmd));
  
  	/* Get size of crash record. */
  	mbox_cmd[0] = MBOX_CMD_GET_CRASH_RECORD;
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 5, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS) {
  		DEBUG2(printk("scsi%ld: %s: ERROR: Unable to retrieve size!\n",
  			      ha->host_no, __func__));
  		goto exit_get_crash_record;
  	}
  	crash_record_size = mbox_sts[4];
  	if (crash_record_size == 0) {
  		DEBUG2(printk("scsi%ld: %s: ERROR: Crash record size is 0!\n",
  			      ha->host_no, __func__));
  		goto exit_get_crash_record;
  	}
  
  	/* Alloc Memory for Crash Record. */
  	crash_record = dma_alloc_coherent(&ha->pdev->dev, crash_record_size,
  					  &crash_record_dma, GFP_KERNEL);
  	if (crash_record == NULL)
  		goto exit_get_crash_record;
  
  	/* Get Crash Record. */
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_cmd));
  
  	mbox_cmd[0] = MBOX_CMD_GET_CRASH_RECORD;
  	mbox_cmd[2] = LSDW(crash_record_dma);
  	mbox_cmd[3] = MSDW(crash_record_dma);
  	mbox_cmd[4] = crash_record_size;
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 5, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS)
  		goto exit_get_crash_record;
  
  	/* Dump Crash Record. */
  
  exit_get_crash_record:
  	if (crash_record)
  		dma_free_coherent(&ha->pdev->dev, crash_record_size,
  				  crash_record, crash_record_dma);
  }
  
  /**
   * qla4xxx_get_conn_event_log - retrieves connection event log
   * @ha: Pointer to host adapter structure.
   **/
  void qla4xxx_get_conn_event_log(struct scsi_qla_host * ha)
  {
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  	struct conn_event_log_entry *event_log = NULL;
  	dma_addr_t event_log_dma = 0;
  	uint32_t event_log_size = 0;
  	uint32_t num_valid_entries;
  	uint32_t      oldest_entry = 0;
  	uint32_t	max_event_log_entries;
  	uint8_t		i;
  
  
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_cmd));
  
  	/* Get size of crash record. */
  	mbox_cmd[0] = MBOX_CMD_GET_CONN_EVENT_LOG;
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 5, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS)
  		goto exit_get_event_log;
  
  	event_log_size = mbox_sts[4];
  	if (event_log_size == 0)
  		goto exit_get_event_log;
  
  	/* Alloc Memory for Crash Record. */
  	event_log = dma_alloc_coherent(&ha->pdev->dev, event_log_size,
  				       &event_log_dma, GFP_KERNEL);
  	if (event_log == NULL)
  		goto exit_get_event_log;
  
  	/* Get Crash Record. */
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_cmd));
  
  	mbox_cmd[0] = MBOX_CMD_GET_CONN_EVENT_LOG;
  	mbox_cmd[2] = LSDW(event_log_dma);
  	mbox_cmd[3] = MSDW(event_log_dma);
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 5, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS) {
  		DEBUG2(printk("scsi%ld: %s: ERROR: Unable to retrieve event "
  			      "log!\n", ha->host_no, __func__));
  		goto exit_get_event_log;
  	}
  
  	/* Dump Event Log. */
  	num_valid_entries = mbox_sts[1];
  
  	max_event_log_entries = event_log_size /
  		sizeof(struct conn_event_log_entry);
  
  	if (num_valid_entries > max_event_log_entries)
  		oldest_entry = num_valid_entries % max_event_log_entries;
  
  	DEBUG3(printk("scsi%ld: Connection Event Log Dump (%d entries):\n",
  		      ha->host_no, num_valid_entries));
  
  	if (ql4xextended_error_logging == 3) {
  		if (oldest_entry == 0) {
  			/* Circular Buffer has not wrapped around */
  			for (i=0; i < num_valid_entries; i++) {
  				qla4xxx_dump_buffer((uint8_t *)event_log+
  						    (i*sizeof(*event_log)),
  						    sizeof(*event_log));
  			}
  		}
  		else {
  			/* Circular Buffer has wrapped around -
  			 * display accordingly*/
  			for (i=oldest_entry; i < max_event_log_entries; i++) {
  				qla4xxx_dump_buffer((uint8_t *)event_log+
  						    (i*sizeof(*event_log)),
  						    sizeof(*event_log));
  			}
  			for (i=0; i < oldest_entry; i++) {
  				qla4xxx_dump_buffer((uint8_t *)event_log+
  						    (i*sizeof(*event_log)),
  						    sizeof(*event_log));
  			}
  		}
  	}
  
  exit_get_event_log:
  	if (event_log)
  		dma_free_coherent(&ha->pdev->dev, event_log_size, event_log,
  				  event_log_dma);
  }
  
  /**
   * qla4xxx_reset_lun - issues LUN Reset
   * @ha: Pointer to host adapter structure.
   * @db_entry: Pointer to device database entry
   * @un_entry: Pointer to lun entry structure
   *
   * This routine performs a LUN RESET on the specified target/lun.
   * The caller must ensure that the ddb_entry and lun_entry pointers
   * are valid before calling this routine.
   **/
  int qla4xxx_reset_lun(struct scsi_qla_host * ha, struct ddb_entry * ddb_entry,
  		      int lun)
  {
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  	int status = QLA_SUCCESS;
  
  	DEBUG2(printk("scsi%ld:%d:%d: lun reset issued\n", ha->host_no,
  		      ddb_entry->os_target_id, lun));
  
  	/*
  	 * Send lun reset command to ISP, so that the ISP will return all
  	 * outstanding requests with RESET status
  	 */
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	mbox_cmd[0] = MBOX_CMD_LUN_RESET;
  	mbox_cmd[1] = ddb_entry->fw_ddb_index;
  	mbox_cmd[2] = lun << 8;
  	mbox_cmd[5] = 0x01;	/* Immediate Command Enable */
  
  	qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0], &mbox_sts[0]);
  	if (mbox_sts[0] != MBOX_STS_COMMAND_COMPLETE &&
  	    mbox_sts[0] != MBOX_STS_COMMAND_ERROR)
  		status = QLA_ERROR;
  
  	return status;
  }
  
  
  int qla4xxx_get_flash(struct scsi_qla_host * ha, dma_addr_t dma_addr,
  		      uint32_t offset, uint32_t len)
  {
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	mbox_cmd[0] = MBOX_CMD_READ_FLASH;
  	mbox_cmd[1] = LSDW(dma_addr);
  	mbox_cmd[2] = MSDW(dma_addr);
  	mbox_cmd[3] = offset;
  	mbox_cmd[4] = len;
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 2, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS) {
  		DEBUG2(printk("scsi%ld: %s: MBOX_CMD_READ_FLASH, failed w/ "
  		    "status %04X %04X, offset %08x, len %08x\n", ha->host_no,
  		    __func__, mbox_sts[0], mbox_sts[1], offset, len));
  		return QLA_ERROR;
  	}
  	return QLA_SUCCESS;
  }
  
  /**
   * qla4xxx_get_fw_version - gets firmware version
   * @ha: Pointer to host adapter structure.
   *
   * Retrieves the firmware version on HBA. In QLA4010, mailboxes 2 & 3 may
   * hold an address for data.  Make sure that we write 0 to those mailboxes,
   * if unused.
   **/
  int qla4xxx_get_fw_version(struct scsi_qla_host * ha)
  {
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  
  	/* Get firmware version. */
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	mbox_cmd[0] = MBOX_CMD_ABOUT_FW;
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 5, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS) {
  		DEBUG2(printk("scsi%ld: %s: MBOX_CMD_ABOUT_FW failed w/ "
  		    "status %04X\n", ha->host_no, __func__, mbox_sts[0]));
  		return QLA_ERROR;
  	}
  
  	/* Save firmware version information. */
  	ha->firmware_version[0] = mbox_sts[1];
  	ha->firmware_version[1] = mbox_sts[2];
  	ha->patch_number = mbox_sts[3];
  	ha->build_number = mbox_sts[4];
  
  	return QLA_SUCCESS;
  }
  
  static int qla4xxx_get_default_ddb(struct scsi_qla_host *ha,
  				   dma_addr_t dma_addr)
  {
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	mbox_cmd[0] = MBOX_CMD_GET_DATABASE_ENTRY_DEFAULTS;
  	mbox_cmd[2] = LSDW(dma_addr);
  	mbox_cmd[3] = MSDW(dma_addr);
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 1, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS) {
  		DEBUG2(printk("scsi%ld: %s: failed status %04X\n",
  		     ha->host_no, __func__, mbox_sts[0]));
  		return QLA_ERROR;
  	}
  	return QLA_SUCCESS;
  }
  
  static int qla4xxx_req_ddb_entry(struct scsi_qla_host *ha, uint32_t *ddb_index)
  {
  	uint32_t mbox_cmd[MBOX_REG_COUNT];
  	uint32_t mbox_sts[MBOX_REG_COUNT];
  
  	memset(&mbox_cmd, 0, sizeof(mbox_cmd));
  	memset(&mbox_sts, 0, sizeof(mbox_sts));
  
  	mbox_cmd[0] = MBOX_CMD_REQUEST_DATABASE_ENTRY;
  	mbox_cmd[1] = MAX_PRST_DEV_DB_ENTRIES;
  
  	if (qla4xxx_mailbox_command(ha, MBOX_REG_COUNT, 3, &mbox_cmd[0], &mbox_sts[0]) !=
  	    QLA_SUCCESS) {
  		if (mbox_sts[0] == MBOX_STS_COMMAND_ERROR) {
  			*ddb_index = mbox_sts[2];
  		} else {
  			DEBUG2(printk("scsi%ld: %s: failed status %04X\n",
  			     ha->host_no, __func__, mbox_sts[0]));
  			return QLA_ERROR;
  		}
  	} else {
  		*ddb_index = MAX_PRST_DEV_DB_ENTRIES;
  	}
  
  	return QLA_SUCCESS;
  }
  
  
  int qla4xxx_send_tgts(struct scsi_qla_host *ha, char *ip, uint16_t port)
  {
  	struct dev_db_entry *fw_ddb_entry;
  	dma_addr_t fw_ddb_entry_dma;
  	uint32_t ddb_index;
  	int ret_val = QLA_SUCCESS;
  
  
  	fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev,
  					  sizeof(*fw_ddb_entry),
  					  &fw_ddb_entry_dma, GFP_KERNEL);
  	if (!fw_ddb_entry) {
  		DEBUG2(printk("scsi%ld: %s: Unable to allocate dma buffer.\n",
  			      ha->host_no, __func__));
  		ret_val = QLA_ERROR;
  		goto qla4xxx_send_tgts_exit;
  	}
  
  	ret_val = qla4xxx_get_default_ddb(ha, fw_ddb_entry_dma);
  	if (ret_val != QLA_SUCCESS)
  		goto qla4xxx_send_tgts_exit;
  
  	ret_val = qla4xxx_req_ddb_entry(ha, &ddb_index);
  	if (ret_val != QLA_SUCCESS)
  		goto qla4xxx_send_tgts_exit;
  
  	memset(fw_ddb_entry->iscsi_alias, 0,
  	       sizeof(fw_ddb_entry->iscsi_alias));
  
  	memset(fw_ddb_entry->iscsi_name, 0,
  	       sizeof(fw_ddb_entry->iscsi_name));
  
  	memset(fw_ddb_entry->ip_addr, 0, sizeof(fw_ddb_entry->ip_addr));
  	memset(fw_ddb_entry->tgt_addr, 0,
  	       sizeof(fw_ddb_entry->tgt_addr));
  
  	fw_ddb_entry->options = (DDB_OPT_DISC_SESSION | DDB_OPT_TARGET);
  	fw_ddb_entry->port = cpu_to_le16(ntohs(port));
  
  	fw_ddb_entry->ip_addr[0] = *ip;
  	fw_ddb_entry->ip_addr[1] = *(ip + 1);
  	fw_ddb_entry->ip_addr[2] = *(ip + 2);
  	fw_ddb_entry->ip_addr[3] = *(ip + 3);
  
  	ret_val = qla4xxx_set_ddb_entry(ha, ddb_index, fw_ddb_entry_dma);
  
  qla4xxx_send_tgts_exit:
  	dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
  			  fw_ddb_entry, fw_ddb_entry_dma);
  	return ret_val;
  }
  
  