ql4_mbx.c

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	    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;
}