qla_isr.c

h内核

		 */
		memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));

		if (!(scsi_status & SS_SENSE_LEN_VALID))
			break;

		if (le16_to_cpu(pkt->req_sense_length) <
		    sizeof(cp->sense_buffer))
			sense_sz = le16_to_cpu(pkt->req_sense_length);
		else
			sense_sz = sizeof(cp->sense_buffer);

		CMD_ACTUAL_SNSLEN(cp) = sense_sz;
		sp->request_sense_length = sense_sz;
		sp->request_sense_ptr = cp->sense_buffer;

		if (sp->request_sense_length > 32)
			sense_sz = 32;

		memcpy(cp->sense_buffer, pkt->req_sense_data, sense_sz);

		sp->request_sense_ptr += sense_sz;
		sp->request_sense_length -= sense_sz;
		if (sp->request_sense_length != 0)
			ha->status_srb = sp;

		if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
		    qla2x00_check_sense(cp, lq) == QLA_SUCCESS) {
			/* Throw away status_cont if any */
			ha->status_srb = NULL;
			add_to_scsi_retry_queue(ha, sp);
			return;
		}

		DEBUG5(printk("%s(): Check condition Sense data, "
		    "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
		    __func__, ha->host_no, b, t, l, cp,
		    cp->serial_number));
		if (sense_sz)
			DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
			    CMD_ACTUAL_SNSLEN(cp)));
		break;

	case CS_DATA_UNDERRUN:
		DEBUG2(printk(KERN_INFO
		    "scsi(%ld:%d:%d) UNDERRUN status detected 0x%x-0x%x.\n",
		    ha->host_no, t, l, comp_status, scsi_status));

		resid = le32_to_cpu(pkt->residual_length);
		if (scsi_status & SS_RESIDUAL_UNDER) {
			cp->resid = resid;
			CMD_RESID_LEN(cp) = resid;
		}

		/*
		 * Check to see if SCSI Status is non zero. If so report SCSI 
		 * Status.
		 */
		if (lscsi_status != 0) {
			if (lscsi_status == SS_BUSY_CONDITION) {
				cp->result = DID_BUS_BUSY << 16 |
				    lscsi_status;
				break;
			}

			cp->result = DID_OK << 16 | lscsi_status;

			if (lscsi_status != SS_CHECK_CONDITION)
				break;

			/* Copy Sense Data into sense buffer */
			memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));

			if (!(scsi_status & SS_SENSE_LEN_VALID))
				break;

			if (le16_to_cpu(pkt->req_sense_length) <
			    sizeof(cp->sense_buffer))
				sense_sz = le16_to_cpu(pkt->req_sense_length);
			else
				sense_sz = sizeof(cp->sense_buffer);

			CMD_ACTUAL_SNSLEN(cp) = sense_sz;
			sp->request_sense_length = sense_sz;
			sp->request_sense_ptr = cp->sense_buffer;

			if (sp->request_sense_length > 32) 
				sense_sz = 32;

			memcpy(cp->sense_buffer, pkt->req_sense_data, sense_sz);

			sp->request_sense_ptr += sense_sz;
			sp->request_sense_length -= sense_sz;
			if (sp->request_sense_length != 0)
				ha->status_srb = sp;

			if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
			    (qla2x00_check_sense(cp, lq) == QLA_SUCCESS)) {
				ha->status_srb = NULL;
				add_to_scsi_retry_queue(ha, sp);
				return;
			}
			DEBUG5(printk("%s(): Check condition Sense data, "
			    "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
			    __func__, ha->host_no, b, t, l, cp,
			    cp->serial_number));
			if (sense_sz)
				DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
				    CMD_ACTUAL_SNSLEN(cp)));
		} else {
			/*
			 * If RISC reports underrun and target does not report
			 * it then we must have a lost frame, so tell upper
			 * layer to retry it by reporting a bus busy.
			 */
			if (!(scsi_status & SS_RESIDUAL_UNDER)) {
				DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
				    "frame(s) detected (%x of %x bytes)..."
				    "retrying command.\n",
				    ha->host_no, b, t, l, resid,
				    cp->request_bufflen));

				cp->result = DID_BUS_BUSY << 16;
				ha->dropped_frame_error_cnt++;
				break;
			}

			/* Handle mid-layer underflow */
			if ((unsigned)(cp->request_bufflen - resid) <
			    cp->underflow) {
				qla_printk(KERN_INFO, ha,
				    "scsi(%ld:%d:%d:%d): Mid-layer underflow "
				    "detected (%x of %x bytes)...returning "
				    "error status.\n",
				    ha->host_no, b, t, l, resid,
				    cp->request_bufflen);

				cp->result = DID_ERROR << 16;
				break;
			}

			/* Everybody online, looking good... */
			cp->result = DID_OK << 16;
		}
		break;

	case CS_DATA_OVERRUN:
		DEBUG2(printk(KERN_INFO
		    "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
		    ha->host_no, t, l, comp_status, scsi_status));
		DEBUG2(printk(KERN_INFO
		    "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
		    cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
		    cp->cmnd[4], cp->cmnd[5]));
		DEBUG2(printk(KERN_INFO
		    "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
		    "status!\n",
		    cp->serial_number, cp->request_bufflen,
		    le32_to_cpu(pkt->residual_length)));

		cp->result = DID_ERROR << 16;
		break;

	case CS_PORT_LOGGED_OUT:
	case CS_PORT_CONFIG_CHG:
	case CS_PORT_BUSY:
	case CS_INCOMPLETE:
	case CS_PORT_UNAVAILABLE:
		/*
		 * If the port is in Target Down state, return all IOs for this
		 * Target with DID_NO_CONNECT ELSE Queue the IOs in the
		 * retry_queue.
		 */
		fcport = sp->fclun->fcport;
		DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
		    "pid=%ld, compl status=0x%x, port state=0x%x\n",
		    ha->host_no, t, l, cp->serial_number, comp_status,
		    atomic_read(&fcport->state)));

		if ((sp->flags & (SRB_IOCTL | SRB_TAPE)) ||
		    atomic_read(&fcport->state) == FCS_DEVICE_DEAD) {
			cp->result = DID_NO_CONNECT << 16;
			if (atomic_read(&ha->loop_state) == LOOP_DOWN) 
				sp->err_id = SRB_ERR_LOOP;
			else
				sp->err_id = SRB_ERR_PORT;
			add_to_done_queue(ha, sp);
		} else {
			qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
			add_to_retry_queue(ha, sp);
		}

		if (atomic_read(&fcport->state) == FCS_ONLINE) {
			qla2x00_mark_device_lost(ha, fcport, 1);
		}

		return;
		break;

	case CS_RESET:
		DEBUG2(printk(KERN_INFO
		    "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
		    ha->host_no, comp_status, scsi_status));

		if (sp->flags & (SRB_IOCTL | SRB_TAPE)) {
			cp->result = DID_RESET << 16;
		} else {
			qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
			add_to_retry_queue(ha, sp);
			return;
		}
		break;

	case CS_ABORTED:
		/* 
		 * hv2.19.12 - DID_ABORT does not retry the request if we
		 * aborted this request then abort otherwise it must be a
		 * reset.
		 */
		DEBUG2(printk(KERN_INFO
		    "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
		    ha->host_no, comp_status, scsi_status));

		cp->result = DID_RESET << 16;
		break;

	case CS_TIMEOUT:
		DEBUG2(printk(KERN_INFO
		    "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
		    "sflags=%x.\n", ha->host_no, b, t, l, comp_status,
		    scsi_status, le16_to_cpu(pkt->status_flags)));

		cp->result = DID_BUS_BUSY << 16;

		fcport = lq->fclun->fcport;

		/* Check to see if logout occurred */
		if ((le16_to_cpu(pkt->status_flags) & SF_LOGOUT_SENT)) {
			qla2x00_mark_device_lost(ha, fcport, 1);
		}
		break;

	case CS_QUEUE_FULL:
		DEBUG2(printk(KERN_INFO
		    "scsi(%ld): QUEUE FULL status detected 0x%x-0x%x.\n",
		    ha->host_no, comp_status, scsi_status));

		/* SCSI Mid-Layer handles device queue full */

		cp->result = DID_OK << 16 | lscsi_status; 

		/* TODO: ??? */
		/* Adjust queue depth */
		ret = scsi_track_queue_full(cp->device,
		    sp->lun_queue->out_cnt - 1);
		if (ret) {
			qla_printk(KERN_INFO, ha,
			    "scsi(%ld:%d:%d:%d): Queue depth adjusted to %d.\n",
			    ha->host_no, cp->device->channel, cp->device->id,
			    cp->device->lun, ret);
		}
		break;

	default:
		DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
		    "0x%x-0x%x.\n",
		    ha->host_no, comp_status, scsi_status));
		qla_printk(KERN_INFO, ha,
		    "Unknown status detected 0x%x-0x%x.\n",
		    comp_status, scsi_status);

		cp->result = DID_ERROR << 16;
		break;
	}

	/* Place command on done queue. */
	if (ha->status_srb == NULL)
		add_to_done_queue(ha, sp);
}

/**
 * qla2x00_status_cont_entry() - Process a Status Continuations entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 *
 * Extended sense data.
 */
static void
qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
{
	uint8_t		sense_sz = 0;
	srb_t		*sp = ha->status_srb;
	struct scsi_cmnd *cp;

	if (sp != NULL && sp->request_sense_length != 0) {
		cp = sp->cmd;
		if (cp == NULL) {
			DEBUG2(printk("%s(): Cmd already returned back to OS "
			    "sp=%p sp->state:%d\n", __func__, sp, sp->state));
			qla_printk(KERN_INFO, ha,
			    "cmd is NULL: already returned to OS (sp=%p)\n",
			    sp); 

			ha->status_srb = NULL;
			return;
		}

		if (sp->request_sense_length > sizeof(pkt->data)) {
			sense_sz = sizeof(pkt->data);
		} else {
			sense_sz = sp->request_sense_length;
		}

		/* Move sense data. */
		memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
		DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));

		sp->request_sense_ptr += sense_sz;
		sp->request_sense_length -= sense_sz;

		/* Place command on done queue. */
		if (sp->request_sense_length == 0) {
			add_to_done_queue(ha, sp);
			ha->status_srb = NULL;
		}
	}
}

/**
 * qla2x00_error_entry() - Process an error entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 */
static void
qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt) 
{
	srb_t *sp;

#if defined(QL_DEBUG_LEVEL_2)
	if (pkt->entry_status & RF_INV_E_ORDER)
		qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
	else if (pkt->entry_status & RF_INV_E_COUNT)
		qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
	else if (pkt->entry_status & RF_INV_E_PARAM)
		qla_printk(KERN_ERR, ha, 
		    "%s: Invalid Entry Parameter\n", __func__);
	else if (pkt->entry_status & RF_INV_E_TYPE)
		qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
	else if (pkt->entry_status & RF_BUSY)
		qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
	else
		qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
#endif

	/* Validate handle. */
	if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
		sp = ha->outstanding_cmds[pkt->handle];
	else
		sp = NULL;

	if (sp) {
		/* Free outstanding command slot. */
		ha->outstanding_cmds[pkt->handle] = NULL;
		if (ha->actthreads)
			ha->actthreads--;
		sp->lun_queue->out_cnt--;

		/* Bad payload or header */
		if (pkt->entry_status &
		    (RF_INV_E_ORDER | RF_INV_E_COUNT |
		     RF_INV_E_PARAM | RF_INV_E_TYPE)) {
			sp->cmd->result = DID_ERROR << 16;
		} else if (pkt->entry_status & RF_BUSY) {
			sp->cmd->result = DID_BUS_BUSY << 16;
		} else {
			sp->cmd->result = DID_ERROR << 16;
		}
		/* Place command on done queue. */
		add_to_done_queue(ha, sp);

	} else if (pkt->entry_type == COMMAND_A64_TYPE ||
	    pkt->entry_type == COMMAND_TYPE) {
		DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
		    ha->host_no));
		qla_printk(KERN_WARNING, ha,
		    "Error entry - invalid handle\n");

		set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
		if (ha->dpc_wait && !ha->dpc_active) 
			up(ha->dpc_wait);
	}
}

/**
 * qla2x00_ms_entry() - Process a Management Server entry.
 * @ha: SCSI driver HA context
 * @index: Response queue out pointer
 */
static void
qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt) 
{
	srb_t          *sp;

	DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
	    __func__, ha->host_no, pkt, pkt->handle1));

	/* Validate handle. */
 	if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
 		sp = ha->outstanding_cmds[pkt->handle1];
	else
		sp = NULL;

	if (sp == NULL) {
		DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
		    ha->host_no));
		qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");

		set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
		return;
	}

	CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
	CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;

	/* Free outstanding command slot. */
	ha->outstanding_cmds[pkt->handle1] = NULL;

	add_to_done_queue(ha, sp);
}

/**
 * qla2x00_check_sense() - Perform any sense data interrogation.
 * @cp: SCSI Command
 * @lq: Lun queue
 *
 * Returns QLA_SUCCESS if the lun queue is suspended, else
 * QLA_FUNCTION_FAILED  (lun queue not suspended).
 */
static int 
qla2x00_check_sense(struct scsi_cmnd *cp, os_lun_t *lq)
{
	scsi_qla_host_t	*ha;
	srb_t		*sp;
	fc_port_t	*fcport;

	ha = (scsi_qla_host_t *) cp->device->host->hostdata;
	if ((cp->sense_buffer[0] & 0x70) != 0x70) {
		return (QLA_FUNCTION_FAILED);
	}

	sp = (srb_t * )CMD_SP(cp);
	sp->flags |= SRB_GOT_SENSE;

	switch (cp->sense_buffer[2] & 0xf) {
	case RECOVERED_ERROR:
		cp->result = DID_OK << 16;
		cp->sense_buffer[0] = 0;
		break;

	case NOT_READY:
		fcport = lq->fclun->fcport;

		/*
		 * Suspend the lun only for hard disk device type.
		 */
		if ((fcport->flags & FCF_TAPE_PRESENT) == 0 &&
		    lq->q_state != LUN_STATE_TIMEOUT) {
			/*
			 * If target is in process of being ready then suspend
			 * lun for 6 secs and retry all the commands.
			 */
			if (cp->sense_buffer[12] == 0x4 &&
			    cp->sense_buffer[13] == 0x1) {

				/* Suspend the lun for 6 secs */
				qla2x00_suspend_lun(ha, lq, 6,
				    ql2xsuspendcount);

				return (QLA_SUCCESS);
			}
		}
		break;
	}

	return (QLA_FUNCTION_FAILED);
}