qla_os.c

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qc24_fail_command:
	done(cmd);

	return 0;
}


/*
 * qla2x00_eh_wait_on_command
 *    Waits for the command to be returned by the Firmware for some
 *    max time.
 *
 * Input:
 *    ha = actual ha whose done queue will contain the command
 *	      returned by firmware.
 *    cmd = Scsi Command to wait on.
 *    flag = Abort/Reset(Bus or Device Reset)
 *
 * Return:
 *    Not Found : 0
 *    Found : 1
 */
static int
qla2x00_eh_wait_on_command(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
{
#define ABORT_POLLING_PERIOD	1000
#define ABORT_WAIT_ITER		((10 * 1000) / (ABORT_POLLING_PERIOD))
	unsigned long wait_iter = ABORT_WAIT_ITER;
	int ret = QLA_SUCCESS;

	while (CMD_SP(cmd)) {
		msleep(ABORT_POLLING_PERIOD);

		if (--wait_iter)
			break;
	}
	if (CMD_SP(cmd))
		ret = QLA_FUNCTION_FAILED;

	return ret;
}

/*
 * qla2x00_wait_for_hba_online
 *    Wait till the HBA is online after going through
 *    <= MAX_RETRIES_OF_ISP_ABORT  or
 *    finally HBA is disabled ie marked offline
 *
 * Input:
 *     ha - pointer to host adapter structure
 *
 * Note:
 *    Does context switching-Release SPIN_LOCK
 *    (if any) before calling this routine.
 *
 * Return:
 *    Success (Adapter is online) : 0
 *    Failed  (Adapter is offline/disabled) : 1
 */
int
qla2x00_wait_for_hba_online(scsi_qla_host_t *ha)
{
	int		return_status;
	unsigned long	wait_online;
	scsi_qla_host_t *pha = to_qla_parent(ha);

	wait_online = jiffies + (MAX_LOOP_TIMEOUT * HZ);
	while (((test_bit(ISP_ABORT_NEEDED, &pha->dpc_flags)) ||
	    test_bit(ABORT_ISP_ACTIVE, &pha->dpc_flags) ||
	    test_bit(ISP_ABORT_RETRY, &pha->dpc_flags) ||
	    pha->dpc_active) && time_before(jiffies, wait_online)) {

		msleep(1000);
	}
	if (pha->flags.online)
		return_status = QLA_SUCCESS;
	else
		return_status = QLA_FUNCTION_FAILED;

	DEBUG2(printk("%s return_status=%d\n",__func__,return_status));

	return (return_status);
}

/*
 * qla2x00_wait_for_loop_ready
 *    Wait for MAX_LOOP_TIMEOUT(5 min) value for loop
 *    to be in LOOP_READY state.
 * Input:
 *     ha - pointer to host adapter structure
 *
 * Note:
 *    Does context switching-Release SPIN_LOCK
 *    (if any) before calling this routine.
 *
 *
 * Return:
 *    Success (LOOP_READY) : 0
 *    Failed  (LOOP_NOT_READY) : 1
 */
static inline int
qla2x00_wait_for_loop_ready(scsi_qla_host_t *ha)
{
	int 	 return_status = QLA_SUCCESS;
	unsigned long loop_timeout ;
	scsi_qla_host_t *pha = to_qla_parent(ha);

	/* wait for 5 min at the max for loop to be ready */
	loop_timeout = jiffies + (MAX_LOOP_TIMEOUT * HZ);

	while ((!atomic_read(&pha->loop_down_timer) &&
	    atomic_read(&pha->loop_state) == LOOP_DOWN) ||
	    atomic_read(&pha->loop_state) != LOOP_READY) {
		if (atomic_read(&pha->loop_state) == LOOP_DEAD) {
			return_status = QLA_FUNCTION_FAILED;
			break;
		}
		msleep(1000);
		if (time_after_eq(jiffies, loop_timeout)) {
			return_status = QLA_FUNCTION_FAILED;
			break;
		}
	}
	return (return_status);
}

static void
qla2x00_block_error_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host *shost = cmnd->device->host;
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
	unsigned long flags;

	spin_lock_irqsave(shost->host_lock, flags);
	while (rport->port_state == FC_PORTSTATE_BLOCKED) {
		spin_unlock_irqrestore(shost->host_lock, flags);
		msleep(1000);
		spin_lock_irqsave(shost->host_lock, flags);
	}
	spin_unlock_irqrestore(shost->host_lock, flags);
	return;
}

/**************************************************************************
* qla2xxx_eh_abort
*
* Description:
*    The abort function will abort the specified command.
*
* Input:
*    cmd = Linux SCSI command packet to be aborted.
*
* Returns:
*    Either SUCCESS or FAILED.
*
* Note:
*    Only return FAILED if command not returned by firmware.
**************************************************************************/
static int
qla2xxx_eh_abort(struct scsi_cmnd *cmd)
{
	scsi_qla_host_t *ha = shost_priv(cmd->device->host);
	srb_t *sp;
	int ret, i;
	unsigned int id, lun;
	unsigned long serial;
	unsigned long flags;
	int wait = 0;
	scsi_qla_host_t *pha = to_qla_parent(ha);

	qla2x00_block_error_handler(cmd);

	if (!CMD_SP(cmd))
		return SUCCESS;

	ret = SUCCESS;

	id = cmd->device->id;
	lun = cmd->device->lun;
	serial = cmd->serial_number;

	/* Check active list for command command. */
	spin_lock_irqsave(&pha->hardware_lock, flags);
	for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
		sp = pha->outstanding_cmds[i];

		if (sp == NULL)
			continue;

		if (sp->cmd != cmd)
			continue;

		DEBUG2(printk("%s(%ld): aborting sp %p from RISC. pid=%ld.\n",
		    __func__, ha->host_no, sp, serial));
		DEBUG3(qla2x00_print_scsi_cmd(cmd));

		spin_unlock_irqrestore(&pha->hardware_lock, flags);
		if (ha->isp_ops->abort_command(ha, sp)) {
			DEBUG2(printk("%s(%ld): abort_command "
			    "mbx failed.\n", __func__, ha->host_no));
		} else {
			DEBUG3(printk("%s(%ld): abort_command "
			    "mbx success.\n", __func__, ha->host_no));
			wait = 1;
		}
		spin_lock_irqsave(&pha->hardware_lock, flags);

		break;
	}
	spin_unlock_irqrestore(&pha->hardware_lock, flags);

	/* Wait for the command to be returned. */
	if (wait) {
		if (qla2x00_eh_wait_on_command(ha, cmd) != QLA_SUCCESS) {
			qla_printk(KERN_ERR, ha,
			    "scsi(%ld:%d:%d): Abort handler timed out -- %lx "
			    "%x.\n", ha->host_no, id, lun, serial, ret);
			ret = FAILED;
		}
	}

	qla_printk(KERN_INFO, ha,
	    "scsi(%ld:%d:%d): Abort command issued -- %d %lx %x.\n",
	    ha->host_no, id, lun, wait, serial, ret);

	return ret;
}

/**************************************************************************
* qla2x00_eh_wait_for_pending_target_commands
*
* Description:
*    Waits for all the commands to come back from the specified target.
*
* Input:
*    ha - pointer to scsi_qla_host structure.
*    t  - target
* Returns:
*    Either SUCCESS or FAILED.
*
* Note:
**************************************************************************/
static int
qla2x00_eh_wait_for_pending_target_commands(scsi_qla_host_t *ha, unsigned int t)
{
	int	cnt;
	int	status;
	srb_t		*sp;
	struct scsi_cmnd *cmd;
	unsigned long flags;
	scsi_qla_host_t *pha = to_qla_parent(ha);

	status = 0;

	/*
	 * Waiting for all commands for the designated target in the active
	 * array
	 */
	for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
		spin_lock_irqsave(&pha->hardware_lock, flags);
		sp = pha->outstanding_cmds[cnt];
		if (sp) {
			cmd = sp->cmd;
			spin_unlock_irqrestore(&pha->hardware_lock, flags);
			if (cmd->device->id == t &&
			    ha->vp_idx == sp->ha->vp_idx) {
				if (!qla2x00_eh_wait_on_command(ha, cmd)) {
					status = 1;
					break;
				}
			}
		} else {
			spin_unlock_irqrestore(&pha->hardware_lock, flags);
		}
	}
	return (status);
}


/**************************************************************************
* qla2xxx_eh_device_reset
*
* Description:
*    The device reset function will reset the target and abort any
*    executing commands.
*
*    NOTE: The use of SP is undefined within this context.  Do *NOT*
*          attempt to use this value, even if you determine it is
*          non-null.
*
* Input:
*    cmd = Linux SCSI command packet of the command that cause the
*          bus device reset.
*
* Returns:
*    SUCCESS/FAILURE (defined as macro in scsi.h).
*
**************************************************************************/
static int
qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
{
	scsi_qla_host_t *ha = shost_priv(cmd->device->host);
	fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
	int ret = FAILED;
	unsigned int id, lun;
	unsigned long serial;

	qla2x00_block_error_handler(cmd);

	id = cmd->device->id;
	lun = cmd->device->lun;
	serial = cmd->serial_number;

	if (!fcport)
		return ret;

	qla_printk(KERN_INFO, ha,
	    "scsi(%ld:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, id, lun);

	if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
		goto eh_dev_reset_done;

	if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
		if (qla2x00_device_reset(ha, fcport) == 0)
			ret = SUCCESS;

#if defined(LOGOUT_AFTER_DEVICE_RESET)
		if (ret == SUCCESS) {
			if (fcport->flags & FC_FABRIC_DEVICE) {
				ha->isp_ops->fabric_logout(ha, fcport->loop_id);
				qla2x00_mark_device_lost(ha, fcport, 0, 0);
			}
		}
#endif
	} else {
		DEBUG2(printk(KERN_INFO
		    "%s failed: loop not ready\n",__func__));
	}

	if (ret == FAILED) {
		DEBUG3(printk("%s(%ld): device reset failed\n",
		    __func__, ha->host_no));
		qla_printk(KERN_INFO, ha, "%s: device reset failed\n",
		    __func__);

		goto eh_dev_reset_done;
	}

	/* Flush outstanding commands. */
	if (qla2x00_eh_wait_for_pending_target_commands(ha, id))
		ret = FAILED;
	if (ret == FAILED) {
		DEBUG3(printk("%s(%ld): failed while waiting for commands\n",
		    __func__, ha->host_no));
		qla_printk(KERN_INFO, ha,
		    "%s: failed while waiting for commands\n", __func__);
	} else
		qla_printk(KERN_INFO, ha,
		    "scsi(%ld:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no,
		    id, lun);
 eh_dev_reset_done:
	return ret;
}

/**************************************************************************
* qla2x00_eh_wait_for_pending_commands
*
* Description:
*    Waits for all the commands to come back from the specified host.
*
* Input:
*    ha - pointer to scsi_qla_host structure.
*
* Returns:
*    1 : SUCCESS
*    0 : FAILED
*
* Note:
**************************************************************************/
static int
qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *ha)
{
	int	cnt;
	int	status;
	srb_t		*sp;
	struct scsi_cmnd *cmd;
	unsigned long flags;

	status = 1;

	/*
	 * Waiting for all commands for the designated target in the active
	 * array
	 */
	for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
		spin_lock_irqsave(&ha->hardware_lock, flags);
		sp = ha->outstanding_cmds[cnt];
		if (sp) {
			cmd = sp->cmd;
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
			status = qla2x00_eh_wait_on_command(ha, cmd);
			if (status == 0)
				break;
		}
		else {
			spin_unlock_irqrestore(&ha->hardware_lock, flags);
		}
	}
	return (status);
}


/**************************************************************************
* qla2xxx_eh_bus_reset
*
* Description:
*    The bus reset function will reset the bus and abort any executing
*    commands.
*
* Input:
*    cmd = Linux SCSI command packet of the command that cause the
*          bus reset.
*
* Returns:
*    SUCCESS/FAILURE (defined as macro in scsi.h).
*
**************************************************************************/
static int
qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
{
	scsi_qla_host_t *ha = shost_priv(cmd->device->host);
	scsi_qla_host_t *pha = to_qla_parent(ha);
	fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
	int ret = FAILED;
	unsigned int id, lun;
	unsigned long serial;

	qla2x00_block_error_handler(cmd);

	id = cmd->device->id;
	lun = cmd->device->lun;
	serial = cmd->serial_number;

	if (!fcport)
		return ret;

	qla_printk(KERN_INFO, ha,
	    "scsi(%ld:%d:%d): LOOP RESET ISSUED.\n", ha->host_no, id, lun);

	if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
		DEBUG2(printk("%s failed:board disabled\n",__func__));
		goto eh_bus_reset_done;
	}

	if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
		if (qla2x00_loop_reset(ha) == QLA_SUCCESS)
			ret = SUCCESS;
	}
	if (ret == FAILED)
		goto eh_bus_reset_done;

	/* Flush outstanding commands. */
	if (!qla2x00_eh_wait_for_pending_commands(pha))
		ret = FAILED;

eh_bus_reset_done:
	qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
	    (ret == FAILED) ? "failed" : "succeded");

	return ret;
}

/**************************************************************************
* qla2xxx_eh_host_reset
*
* Description:
*    The reset function will reset the Adapter.
*
* Input:
*      cmd = Linux SCSI command packet of the command that cause the
*            adapter reset.
*
* Returns:
*      Either SUCCESS or FAILED.
*
* Note:
**************************************************************************/
static int
qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
{
	scsi_qla_host_t *ha = shost_priv(cmd->device->host);
	fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
	int ret = FAILED;
	unsigned int id, lun;
	unsigned long serial;
	scsi_qla_host_t *pha = to_qla_parent(ha);

	qla2x00_block_error_handler(cmd);

	id = cmd->device->id;
	lun = cmd->device->lun;
	serial = cmd->serial_number;

	if (!fcport)