ql4_init.c

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 * qla4xxx_alloc_ddb - allocate device database entry
 * @ha: Pointer to host adapter structure.
 * @fw_ddb_index: Firmware's device database index
 *
 * This routine allocates a ddb_entry, ititializes some values, and
 * inserts it into the ddb list.
 **/
static struct ddb_entry * qla4xxx_alloc_ddb(struct scsi_qla_host *ha,
					    uint32_t fw_ddb_index)
{
	struct ddb_entry *ddb_entry;

	DEBUG2(printk("scsi%ld: %s: fw_ddb_index [%d]\n", ha->host_no,
		      __func__, fw_ddb_index));

	ddb_entry = qla4xxx_alloc_sess(ha);
	if (ddb_entry == NULL) {
		DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
			      "to add fw_ddb_index [%d]\n",
			      ha->host_no, __func__, fw_ddb_index));
		return ddb_entry;
	}

	ddb_entry->fw_ddb_index = fw_ddb_index;
	atomic_set(&ddb_entry->port_down_timer, ha->port_down_retry_count);
	atomic_set(&ddb_entry->retry_relogin_timer, INVALID_ENTRY);
	atomic_set(&ddb_entry->relogin_timer, 0);
	atomic_set(&ddb_entry->relogin_retry_count, 0);
	atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
	list_add_tail(&ddb_entry->list, &ha->ddb_list);
	ha->fw_ddb_index_map[fw_ddb_index] = ddb_entry;
	ha->tot_ddbs++;

	return ddb_entry;
}

/**
 * qla4xxx_configure_ddbs - builds driver ddb list
 * @ha: Pointer to host adapter structure.
 *
 * This routine searches for all valid firmware ddb entries and builds
 * an internal ddb list. Ddbs that are considered valid are those with
 * a device state of SESSION_ACTIVE.
 **/
static int qla4xxx_build_ddb_list(struct scsi_qla_host *ha)
{
	int status = QLA_SUCCESS;
	uint32_t fw_ddb_index = 0;
	uint32_t next_fw_ddb_index = 0;
	uint32_t ddb_state;
	uint32_t conn_err, err_code;
	struct ddb_entry *ddb_entry;
	uint32_t new_tgt;

	dev_info(&ha->pdev->dev, "Initializing DDBs ...\n");
	for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES;
	     fw_ddb_index = next_fw_ddb_index) {
		/* First, let's see if a device exists here */
		if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index, NULL, 0, NULL,
					    &next_fw_ddb_index, &ddb_state,
					    &conn_err, NULL, NULL) ==
		    QLA_ERROR) {
			DEBUG2(printk("scsi%ld: %s: get_ddb_entry, "
				      "fw_ddb_index %d failed", ha->host_no,
				      __func__, fw_ddb_index));
			return QLA_ERROR;
		}

		DEBUG2(printk("scsi%ld: %s: Getting DDB[%d] ddbstate=0x%x, "
			      "next_fw_ddb_index=%d.\n", ha->host_no, __func__,
			      fw_ddb_index, ddb_state, next_fw_ddb_index));

		/* Issue relogin, if necessary. */
		if (ddb_state == DDB_DS_SESSION_FAILED ||
		    ddb_state == DDB_DS_NO_CONNECTION_ACTIVE) {
			/* Try and login to device */
			DEBUG2(printk("scsi%ld: %s: Login to DDB[%d]\n",
				      ha->host_no, __func__, fw_ddb_index));
			err_code = ((conn_err & 0x00ff0000) >> 16);
			if (err_code == 0x1c || err_code == 0x06) {
				DEBUG2(printk("scsi%ld: %s send target "
					      "completed "
					      "or access denied failure\n",
					      ha->host_no, __func__));
			} else {
				qla4xxx_set_ddb_entry(ha, fw_ddb_index, 0);
				if (qla4xxx_get_fwddb_entry(ha, fw_ddb_index,
					NULL, 0, NULL, &next_fw_ddb_index,
					&ddb_state, &conn_err, NULL, NULL)
					== QLA_ERROR) {
					DEBUG2(printk("scsi%ld: %s:"
						"get_ddb_entry %d failed\n",
						ha->host_no,
						__func__, fw_ddb_index));
					return QLA_ERROR;
				}
			}
		}

		if (ddb_state != DDB_DS_SESSION_ACTIVE)
			goto next_one;
		/*
		 * if fw_ddb with session active state found,
		 * add to ddb_list
		 */
		DEBUG2(printk("scsi%ld: %s: DDB[%d] added to list\n",
			      ha->host_no, __func__, fw_ddb_index));

		/* Add DDB to internal our ddb list. */
		ddb_entry = qla4xxx_get_ddb_entry(ha, fw_ddb_index, &new_tgt);
		if (ddb_entry == NULL) {
			DEBUG2(printk("scsi%ld: %s: Unable to allocate memory "
				      "for device at fw_ddb_index %d\n",
				      ha->host_no, __func__, fw_ddb_index));
			return QLA_ERROR;
		}
		/* Fill in the device structure */
		if (qla4xxx_update_ddb_entry(ha, ddb_entry, fw_ddb_index) ==
		    QLA_ERROR) {
			ha->fw_ddb_index_map[fw_ddb_index] =
				(struct ddb_entry *)INVALID_ENTRY;


			DEBUG2(printk("scsi%ld: %s: update_ddb_entry failed "
				      "for fw_ddb_index %d.\n",
				      ha->host_no, __func__, fw_ddb_index));
			return QLA_ERROR;
		}

next_one:
		/* We know we've reached the last device when
		 * next_fw_ddb_index is 0 */
		if (next_fw_ddb_index == 0)
			break;
	}

	dev_info(&ha->pdev->dev, "DDB list done..\n");

	return status;
}

struct qla4_relog_scan {
	int halt_wait;
	uint32_t conn_err;
	uint32_t err_code;
	uint32_t fw_ddb_index;
	uint32_t next_fw_ddb_index;
	uint32_t fw_ddb_device_state;
};

static int qla4_test_rdy(struct scsi_qla_host *ha, struct qla4_relog_scan *rs)
{
	struct ddb_entry *ddb_entry;

	/*
	 * Don't want to do a relogin if connection
	 * error is 0x1c.
	 */
	rs->err_code = ((rs->conn_err & 0x00ff0000) >> 16);
	if (rs->err_code == 0x1c || rs->err_code == 0x06) {
		DEBUG2(printk(
			       "scsi%ld: %s send target"
			       " completed or "
			       "access denied failure\n",
			       ha->host_no, __func__));
	} else {
		/* We either have a device that is in
		 * the process of relogging in or a
		 * device that is waiting to be
		 * relogged in */
		rs->halt_wait = 0;

		ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha,
							   rs->fw_ddb_index);
		if (ddb_entry == NULL)
			return QLA_ERROR;

		if (ddb_entry->dev_scan_wait_to_start_relogin != 0
		    && time_after_eq(jiffies,
				     ddb_entry->
				     dev_scan_wait_to_start_relogin))
		{
			ddb_entry->dev_scan_wait_to_start_relogin = 0;
			qla4xxx_set_ddb_entry(ha, rs->fw_ddb_index, 0);
		}
	}
	return QLA_SUCCESS;
}

static int qla4_scan_for_relogin(struct scsi_qla_host *ha,
				 struct qla4_relog_scan *rs)
{
	int error;

	/* scan for relogins
	 * ----------------- */
	for (rs->fw_ddb_index = 0; rs->fw_ddb_index < MAX_DDB_ENTRIES;
	     rs->fw_ddb_index = rs->next_fw_ddb_index) {
		if (qla4xxx_get_fwddb_entry(ha, rs->fw_ddb_index, NULL, 0,
					    NULL, &rs->next_fw_ddb_index,
					    &rs->fw_ddb_device_state,
					    &rs->conn_err, NULL, NULL)
		    == QLA_ERROR)
			return QLA_ERROR;

		if (rs->fw_ddb_device_state == DDB_DS_LOGIN_IN_PROCESS)
			rs->halt_wait = 0;

		if (rs->fw_ddb_device_state == DDB_DS_SESSION_FAILED ||
		    rs->fw_ddb_device_state == DDB_DS_NO_CONNECTION_ACTIVE) {
			error = qla4_test_rdy(ha, rs);
			if (error)
				return error;
		}

		/* We know we've reached the last device when
		 * next_fw_ddb_index is 0 */
		if (rs->next_fw_ddb_index == 0)
			break;
	}
	return QLA_SUCCESS;
}

/**
 * qla4xxx_devices_ready - wait for target devices to be logged in
 * @ha: pointer to adapter structure
 *
 * This routine waits up to ql4xdiscoverywait seconds
 * F/W database during driver load time.
 **/
static int qla4xxx_devices_ready(struct scsi_qla_host *ha)
{
	int error;
	unsigned long discovery_wtime;
	struct qla4_relog_scan rs;

	discovery_wtime = jiffies + (ql4xdiscoverywait * HZ);

	DEBUG(printk("Waiting (%d) for devices ...\n", ql4xdiscoverywait));
	do {
		/* poll for AEN. */
		qla4xxx_get_firmware_state(ha);
		if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) {
			/* Set time-between-relogin timer */
			qla4xxx_process_aen(ha, RELOGIN_DDB_CHANGED_AENS);
		}

		/* if no relogins active or needed, halt discvery wait */
		rs.halt_wait = 1;

		error = qla4_scan_for_relogin(ha, &rs);

		if (rs.halt_wait) {
			DEBUG2(printk("scsi%ld: %s: Delay halted.  Devices "
				      "Ready.\n", ha->host_no, __func__));
			return QLA_SUCCESS;
		}

		msleep(2000);
	} while (!time_after_eq(jiffies, discovery_wtime));

	DEBUG3(qla4xxx_get_conn_event_log(ha));

	return QLA_SUCCESS;
}

static void qla4xxx_flush_AENS(struct scsi_qla_host *ha)
{
	unsigned long wtime;

	/* Flush the 0x8014 AEN from the firmware as a result of
	 * Auto connect. We are basically doing get_firmware_ddb()
	 * to determine whether we need to log back in or not.
	 *  Trying to do a set ddb before we have processed 0x8014
	 *  will result in another set_ddb() for the same ddb. In other
	 *  words there will be stale entries in the aen_q.
	 */
	wtime = jiffies + (2 * HZ);
	do {
		if (qla4xxx_get_firmware_state(ha) == QLA_SUCCESS)
			if (ha->firmware_state & (BIT_2 | BIT_0))
				return;

		if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
			qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);

		msleep(1000);
	} while (!time_after_eq(jiffies, wtime));

}

static int qla4xxx_initialize_ddb_list(struct scsi_qla_host *ha)
{
	uint16_t fw_ddb_index;
	int status = QLA_SUCCESS;

	/* free the ddb list if is not empty */
	if (!list_empty(&ha->ddb_list))
		qla4xxx_free_ddb_list(ha);

	for (fw_ddb_index = 0; fw_ddb_index < MAX_DDB_ENTRIES; fw_ddb_index++)
		ha->fw_ddb_index_map[fw_ddb_index] =
			(struct ddb_entry *)INVALID_ENTRY;

	ha->tot_ddbs = 0;

	qla4xxx_flush_AENS(ha);

	/*
	 * First perform device discovery for active
	 * fw ddb indexes and build
	 * ddb list.
	 */
	if ((status = qla4xxx_build_ddb_list(ha)) == QLA_ERROR)
		return status;

	/* Wait for an AEN */
	qla4xxx_devices_ready(ha);

	/*
	 * Targets can come online after the inital discovery, so processing
	 * the aens here will catch them.
	 */
	if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
		qla4xxx_process_aen(ha, PROCESS_ALL_AENS);

	return status;
}

/**
 * qla4xxx_update_ddb_list - update the driver ddb list
 * @ha: pointer to host adapter structure.
 *
 * This routine obtains device information from the F/W database after
 * firmware or adapter resets.  The device table is preserved.
 **/
int qla4xxx_reinitialize_ddb_list(struct scsi_qla_host *ha)
{
	int status = QLA_SUCCESS;
	struct ddb_entry *ddb_entry, *detemp;

	/* Update the device information for all devices. */
	list_for_each_entry_safe(ddb_entry, detemp, &ha->ddb_list, list) {
		qla4xxx_update_ddb_entry(ha, ddb_entry,
					 ddb_entry->fw_ddb_index);
		if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
			atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
			DEBUG2(printk ("scsi%ld: %s: ddb index [%d] marked "
				       "ONLINE\n", ha->host_no, __func__,
				       ddb_entry->fw_ddb_index));
		} else if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
			qla4xxx_mark_device_missing(ha, ddb_entry);
	}
	return status;
}

/**
 * qla4xxx_relogin_device - re-establish session
 * @ha: Pointer to host adapter structure.
 * @ddb_entry: Pointer to device database entry
 *
 * This routine does a session relogin with the specified device.
 * The ddb entry must be assigned prior to making this call.
 **/
int qla4xxx_relogin_device(struct scsi_qla_host *ha,
			   struct ddb_entry * ddb_entry)
{
	uint16_t relogin_timer;

	relogin_timer = max(ddb_entry->default_relogin_timeout,
			    (uint16_t)RELOGIN_TOV);
	atomic_set(&ddb_entry->relogin_timer, relogin_timer);

	DEBUG2(printk("scsi%ld: Relogin index [%d]. TOV=%d\n", ha->host_no,
		      ddb_entry->fw_ddb_index, relogin_timer));

	qla4xxx_set_ddb_entry(ha, ddb_entry->fw_ddb_index, 0);

	return QLA_SUCCESS;
}

static int qla4xxx_config_nvram(struct scsi_qla_host *ha)
{
	unsigned long flags;
	union external_hw_config_reg extHwConfig;

	DEBUG2(printk("scsi%ld: %s: Get EEProm parameters \n", ha->host_no,
		      __func__));
	if (ql4xxx_lock_flash(ha) != QLA_SUCCESS)
		return (QLA_ERROR);
	if (ql4xxx_lock_nvram(ha) != QLA_SUCCESS) {
		ql4xxx_unlock_flash(ha);
		return (QLA_ERROR);
	}

	/* Get EEPRom Parameters from NVRAM and validate */
	dev_info(&ha->pdev->dev, "Configuring NVRAM ...\n");
	if (qla4xxx_is_nvram_configuration_valid(ha) == QLA_SUCCESS) {
		spin_lock_irqsave(&ha->hardware_lock, flags);
		extHwConfig.Asuint32_t =
			rd_nvram_word(ha, eeprom_ext_hw_conf_offset(ha));
		spin_unlock_irqrestore(&ha->hardware_lock, flags);
	} else {
		/*
		 * QLogic adapters should always have a valid NVRAM.
		 * If not valid, do not load.
		 */
		dev_warn(&ha->pdev->dev,
			   "scsi%ld: %s: EEProm checksum invalid.  "
			   "Please update your EEPROM\n", ha->host_no,
			   __func__);

		/* set defaults */
		if (is_qla4010(ha))
			extHwConfig.Asuint32_t = 0x1912;
		else if (is_qla4022(ha) | is_qla4032(ha))
			extHwConfig.Asuint32_t = 0x0023;
	}
	DEBUG(printk("scsi%ld: %s: Setting extHwConfig to 0xFFFF%04x\n",
		     ha->host_no, __func__, extHwConfig.Asuint32_t));

	spin_lock_irqsave(&ha->hardware_lock, flags);
	writel((0xFFFF << 16) | extHwConfig.Asuint32_t, isp_ext_hw_conf(ha));
	readl(isp_ext_hw_conf(ha));
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	ql4xxx_unlock_nvram(ha);
	ql4xxx_unlock_flash(ha);

	return (QLA_SUCCESS);
}

static void qla4x00_pci_config(struct scsi_qla_host *ha)
{
	uint16_t w;
	int status;

	dev_info(&ha->pdev->dev, "Configuring PCI space...\n");

	pci_set_master(ha->pdev);
	status = pci_set_mwi(ha->pdev);
	/*
	 * We want to respect framework's setting of PCI configuration space
	 * command register and also want to make sure that all bits of
	 * interest to us are properly set in command register.
	 */
	pci_read_config_word(ha->pdev, PCI_COMMAND, &w);
	w |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
	w &= ~PCI_COMMAND_INTX_DISABLE;
	pci_write_config_word(ha->pdev, PCI_COMMAND, w);