qla_isr.c

linux-2.6.15.6

		break;

	case MBA_PORT_UPDATE:		/* Port database update */
		/*
		 * If a single remote port just logged into (or logged out of)
		 * us, create a new entry in our rscn fcports list and handle
		 * the event like an RSCN.
		 */
		if (!IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA6312(ha) &&
		    !IS_QLA6322(ha) && !IS_QLA24XX(ha) && !IS_QLA25XX(ha) &&
		    ha->flags.init_done && mb[1] != 0xffff &&
		    ((ha->operating_mode == P2P && mb[1] != 0) ||
		    (ha->operating_mode != P2P && mb[1] !=
			SNS_FIRST_LOOP_ID)) && (mb[2] == 6 || mb[2] == 7)) {
			int rval;
			fc_port_t *rscn_fcport;

			/* Create new fcport for login. */
			rscn_fcport = qla2x00_alloc_rscn_fcport(ha, GFP_ATOMIC);
			if (rscn_fcport) {
				DEBUG14(printk("scsi(%ld): Port Update -- "
				    "creating RSCN fcport %p for %x/%x/%x.\n",
				    ha->host_no, rscn_fcport, mb[1], mb[2],
				    mb[3]));

				rscn_fcport->loop_id = mb[1];
				rscn_fcport->d_id.b24 = INVALID_PORT_ID;
				atomic_set(&rscn_fcport->state,
				    FCS_DEVICE_LOST);
				list_add_tail(&rscn_fcport->list,
				    &ha->rscn_fcports);

				rval = qla2x00_handle_port_rscn(ha, 0,
				    rscn_fcport, 1);
				if (rval == QLA_SUCCESS)
					break;
			} else {
				DEBUG14(printk("scsi(%ld): Port Update -- "
				    "-- unable to allocate RSCN fcport "
				    "login.\n", ha->host_no));
			}
		}

		/*
		 * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
		 * event etc. earlier indicating loop is down) then process
		 * it.  Otherwise ignore it and Wait for RSCN to come in.
		 */
		atomic_set(&ha->loop_down_timer, 0);
		if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
		    atomic_read(&ha->loop_state) != LOOP_DEAD) {
			DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
			    "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
			    mb[2], mb[3]));
			break;
		}

		DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
		    ha->host_no));
		DEBUG(printk(KERN_INFO
		    "scsi(%ld): Port database changed %04x %04x %04x.\n",
		    ha->host_no, mb[1], mb[2], mb[3]));

		/*
		 * Mark all devices as missing so we will login again.
		 */
		atomic_set(&ha->loop_state, LOOP_UP);

		qla2x00_mark_all_devices_lost(ha);

		ha->flags.rscn_queue_overflow = 1;

		set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
		set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);

		/* Update AEN queue. */
		qla2x00_enqueue_aen(ha, MBA_PORT_UPDATE, NULL);
		break;

	case MBA_RSCN_UPDATE:		/* State Change Registration */
		DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
		    ha->host_no));
		DEBUG(printk(KERN_INFO
		    "scsi(%ld): RSCN database changed -- %04x %04x.\n",
		    ha->host_no, mb[1], mb[2]));

		rscn_entry = (mb[1] << 16) | mb[2];
		host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
		    ha->d_id.b.al_pa;
		if (rscn_entry == host_pid) {
			DEBUG(printk(KERN_INFO
			    "scsi(%ld): Ignoring RSCN update to local host "
			    "port ID (%06x)\n",
			    ha->host_no, host_pid));
			break;
		}

		rscn_queue_index = ha->rscn_in_ptr + 1;
		if (rscn_queue_index == MAX_RSCN_COUNT)
			rscn_queue_index = 0;
		if (rscn_queue_index != ha->rscn_out_ptr) {
			ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
			ha->rscn_in_ptr = rscn_queue_index;
		} else {
			ha->flags.rscn_queue_overflow = 1;
		}

		atomic_set(&ha->loop_state, LOOP_UPDATE);
		atomic_set(&ha->loop_down_timer, 0);
		ha->flags.management_server_logged_in = 0;

		set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
		set_bit(RSCN_UPDATE, &ha->dpc_flags);

		/* Update AEN queue. */
		qla2x00_enqueue_aen(ha, MBA_RSCN_UPDATE, &mb[0]);
		break;

	/* case MBA_RIO_RESPONSE: */
	case MBA_ZIO_RESPONSE:
		DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
		    ha->host_no));
		DEBUG(printk(KERN_INFO
		    "scsi(%ld): [R|Z]IO update completion.\n",
		    ha->host_no));

		if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
			qla24xx_process_response_queue(ha);
		else
			qla2x00_process_response_queue(ha);
		break;

	case MBA_DISCARD_RND_FRAME:
		DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
		    "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
		break;
	}
}

/**
 * qla2x00_process_completed_request() - Process a Fast Post response.
 * @ha: SCSI driver HA context
 * @index: SRB index
 */
static void
qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
{
	srb_t *sp;

	/* Validate handle. */
	if (index >= MAX_OUTSTANDING_COMMANDS) {
		DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
		    ha->host_no, index));
		qla_printk(KERN_WARNING, ha,
		    "Invalid SCSI completion handle %d.\n", index);

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

	sp = ha->outstanding_cmds[index];
	if (sp) {
		/* Free outstanding command slot. */
		ha->outstanding_cmds[index] = NULL;

		CMD_COMPL_STATUS(sp->cmd) = 0L;
		CMD_SCSI_STATUS(sp->cmd) = 0L;

		/* Save ISP completion status */
		sp->cmd->result = DID_OK << 16;
		qla2x00_sp_compl(ha, sp);
	} else {
		DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
		    ha->host_no));
		qla_printk(KERN_WARNING, ha,
		    "Invalid ISP SCSI completion handle\n");

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

/**
 * qla2x00_process_response_queue() - Process response queue entries.
 * @ha: SCSI driver HA context
 */
void
qla2x00_process_response_queue(struct scsi_qla_host *ha)
{
	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
	sts_entry_t	*pkt;
	uint16_t        handle_cnt;
	uint16_t        cnt;

	if (!ha->flags.online)
		return;

	while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
		pkt = (sts_entry_t *)ha->response_ring_ptr;

		ha->rsp_ring_index++;
		if (ha->rsp_ring_index == ha->response_q_length) {
			ha->rsp_ring_index = 0;
			ha->response_ring_ptr = ha->response_ring;
		} else {
			ha->response_ring_ptr++;
		}

		if (pkt->entry_status != 0) {
			DEBUG3(printk(KERN_INFO
			    "scsi(%ld): Process error entry.\n", ha->host_no));

			qla2x00_error_entry(ha, pkt);
			((response_t *)pkt)->signature = RESPONSE_PROCESSED;
			wmb();
			continue;
		}

		switch (pkt->entry_type) {
		case STATUS_TYPE:
			qla2x00_status_entry(ha, pkt);
			break;
		case STATUS_TYPE_21:
			handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
			for (cnt = 0; cnt < handle_cnt; cnt++) {
				qla2x00_process_completed_request(ha,
				    ((sts21_entry_t *)pkt)->handle[cnt]);
			}
			break;
		case STATUS_TYPE_22:
			handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
			for (cnt = 0; cnt < handle_cnt; cnt++) {
				qla2x00_process_completed_request(ha,
				    ((sts22_entry_t *)pkt)->handle[cnt]);
			}
			break;
		case STATUS_CONT_TYPE:
			qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
			break;
		case MS_IOCB_TYPE:
			qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
			break;
		case MBX_IOCB_TYPE:
			if (!IS_QLA2100(ha) && !IS_QLA2200(ha) &&
			    !IS_QLA6312(ha) && !IS_QLA6322(ha)) {
				if (pkt->sys_define == SOURCE_ASYNC_IOCB) {
					qla2x00_process_iodesc(ha,
					    (struct mbx_entry *)pkt);
				} else {
					/* MBX IOCB Type Not Supported. */
					DEBUG4(printk(KERN_WARNING
					    "scsi(%ld): Received unknown MBX "
					    "IOCB response pkt type=%x "
					    "source=%x entry status=%x.\n",
					    ha->host_no, pkt->entry_type,
					    pkt->sys_define,
					    pkt->entry_status));
				}
				break;
			}
			/* Fallthrough. */
		default:
			/* Type Not Supported. */
			DEBUG4(printk(KERN_WARNING
			    "scsi(%ld): Received unknown response pkt type %x "
			    "entry status=%x.\n",
			    ha->host_no, pkt->entry_type, pkt->entry_status));
			break;
		}
		((response_t *)pkt)->signature = RESPONSE_PROCESSED;
		wmb();
	}

	/* Adjust ring index */
	WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
}

/**
 * qla2x00_status_entry() - Process a Status IOCB entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 */
static void
qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
{
	srb_t		*sp;
	fc_port_t	*fcport;
	struct scsi_cmnd *cp;
	sts_entry_t *sts;
	struct sts_entry_24xx *sts24;
	uint16_t	comp_status;
	uint16_t	scsi_status;
	uint8_t		lscsi_status;
	int32_t		resid;
	uint32_t	sense_len, rsp_info_len, resid_len;
	uint8_t		*rsp_info, *sense_data;

	sts = (sts_entry_t *) pkt;
	sts24 = (struct sts_entry_24xx *) pkt;
	if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
		comp_status = le16_to_cpu(sts24->comp_status);
		scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
	} else {
		comp_status = le16_to_cpu(sts->comp_status);
		scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
	}

	/* Fast path completion. */
	if (comp_status == CS_COMPLETE && scsi_status == 0) {
		qla2x00_process_completed_request(ha, sts->handle);

		return;
	}

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

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

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

		return;
	}
	cp = sp->cmd;
	if (cp == NULL) {
		DEBUG2(printk("scsi(%ld): Command already returned back to OS "
		    "pkt->handle=%d sp=%p sp->state:%d\n",
		    ha->host_no, sts->handle, sp, sp->state));
		qla_printk(KERN_WARNING, ha,
		    "Command is NULL: already returned to OS (sp=%p)\n", sp);

		return;
	}

  	lscsi_status = scsi_status & STATUS_MASK;
	CMD_ENTRY_STATUS(cp) = sts->entry_status;
	CMD_COMPL_STATUS(cp) = comp_status;
	CMD_SCSI_STATUS(cp) = scsi_status;

	fcport = sp->fcport;

	sense_len = rsp_info_len = resid_len = 0;
	if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
		sense_len = le32_to_cpu(sts24->sense_len);
		rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
		resid_len = le32_to_cpu(sts24->rsp_residual_count);
		rsp_info = sts24->data;
		sense_data = sts24->data;
		host_to_fcp_swap(sts24->data, sizeof(sts24->data));
	} else {
		sense_len = le16_to_cpu(sts->req_sense_length);
		rsp_info_len = le16_to_cpu(sts->rsp_info_len);
		resid_len = le32_to_cpu(sts->residual_length);
		rsp_info = sts->rsp_info;
		sense_data = sts->req_sense_data;
	}

	/* Check for any FCP transport errors. */
	if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
		/* Sense data lies beyond any FCP RESPONSE data. */
		if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
			sense_data += rsp_info_len;
		if (rsp_info_len > 3 && rsp_info[3]) {
			DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
			    "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
			    "retrying command\n", ha->host_no,
			    cp->device->channel, cp->device->id,
			    cp->device->lun, rsp_info_len, rsp_info[0],
			    rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
			    rsp_info[5], rsp_info[6], rsp_info[7]));

			cp->result = DID_BUS_BUSY << 16;
			qla2x00_sp_compl(ha, sp);
			return;
		}
	}

	/*
	 * Based on Host and scsi status generate status code for Linux
	 */
	switch (comp_status) {
	case CS_COMPLETE:
		if (scsi_status == 0) {
			cp->result = DID_OK << 16;
			break;
		}
		if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
			resid = resid_len;
			cp->resid = resid;
			CMD_RESID_LEN(cp) = resid;

			if (!lscsi_status &&
			    ((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,
				    cp->device->channel, cp->device->id,
				    cp->device->lun, resid,
				    cp->request_bufflen);

				cp->result = DID_ERROR << 16;
				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 (sense_len >= sizeof(cp->sense_buffer))
			sense_len = sizeof(cp->sense_buffer);

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

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

		memcpy(cp->sense_buffer, sense_data, sense_len);

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

		DEBUG5(printk("%s(): Check condition Sense data, "
		    "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
		    ha->host_no, cp->device->channel, cp->device->id,
		    cp->device->lun, cp, cp->serial_number));
		if (sense_len)
			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, cp->device->id, cp->device->lun, comp_status,
		    scsi_status));

		resid = resid_len;
		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) {
			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 (sense_len >= sizeof(cp->sense_buffer))
				sense_len = sizeof(cp->sense_buffer);

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

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

			memcpy(cp->sense_buffer, sense_data, sense_len);

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

			DEBUG5(printk("%s(): Check condition Sense data, "
			    "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
			    __func__, ha->host_no, cp->device->channel,
			    cp->device->id, cp->device->lun, cp,
			    cp->serial_number));

			if (sense_len)
				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 "