qla_isr.c

h内核

		set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);

		ha->operating_mode = LOOP;
		ha->flags.management_server_logged_in = 0;

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

		ha->total_lip_cnt++;
		break;

	case MBA_POINT_TO_POINT:	/* Point-to-Point */
		if (IS_QLA2100(ha))
			break;

		DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
		    ha->host_no));

		/*
		 * Until there's a transition from loop down to loop up, treat
		 * this as loop down only.
		 */
		if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
			atomic_set(&ha->loop_state, LOOP_DOWN);
			if (!atomic_read(&ha->loop_down_timer))
				atomic_set(&ha->loop_down_timer,
				    LOOP_DOWN_TIME);
			qla2x00_mark_all_devices_lost(ha);
		}

		if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
			set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
		}
		set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
		break;

	case MBA_CHG_IN_CONNECTION:	/* Change in connection mode */
		if (IS_QLA2100(ha))
			break;

		mb[1] = RD_MAILBOX_REG(ha, reg, 1);

		DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
		    "received.\n",
		    ha->host_no));
		qla_printk(KERN_INFO, ha,
		    "Configuration change detected: value=%x.\n", mb[1]);

		if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
			atomic_set(&ha->loop_state, LOOP_DOWN);  
			if (!atomic_read(&ha->loop_down_timer))
				atomic_set(&ha->loop_down_timer,
				    LOOP_DOWN_TIME);
			qla2x00_mark_all_devices_lost(ha);
		}

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

	case MBA_PORT_UPDATE:		/* Port database update */
		mb[1] = RD_MAILBOX_REG(ha, reg, 1);
		mb[2] = RD_MAILBOX_REG(ha, reg, 2);

		/*
		 * 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) && 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.\n",
				    ha->host_no, rscn_fcport, mb[1], mb[2]));

				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.\n", ha->host_no));
			break;
		}

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

		/*
		 * 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 */
		mb[1] = RD_MAILBOX_REG(ha, reg, 1);
		mb[2] = RD_MAILBOX_REG(ha, reg, 2);

		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));

		qla2x00_process_response_queue(ha);
		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;

		if (ha->actthreads)
			ha->actthreads--;
		sp->lun_queue->out_cnt--;
		CMD_COMPL_STATUS(sp->cmd) = 0L;
		CMD_SCSI_STATUS(sp->cmd) = 0L;

		/* Save ISP completion status */
		sp->cmd->result = DID_OK << 16;
		sp->fo_retry_cnt = 0;
		add_to_done_queue(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)
{
	device_reg_t __iomem *reg = ha->iobase;
	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, sts_entry_t *pkt)
{
	int		ret;
	unsigned	b, t, l;
	srb_t		*sp;
	os_lun_t	*lq;
	os_tgt_t	*tq;
	fc_port_t	*fcport;
	struct scsi_cmnd *cp;
	uint16_t	comp_status;
	uint16_t	scsi_status;
	uint8_t		lscsi_status;
	int32_t		resid;
	uint8_t		sense_sz = 0;
	uint16_t	rsp_info_len;

	/* Fast path completion. */
	if (le16_to_cpu(pkt->comp_status) == CS_COMPLETE &&
	    (le16_to_cpu(pkt->scsi_status) & SS_MASK) == 0) {
		qla2x00_process_completed_request(ha, pkt->handle);

		return;
	}

	/* Validate handle. */
	if (pkt->handle < MAX_OUTSTANDING_COMMANDS) {
		sp = ha->outstanding_cmds[pkt->handle];
		ha->outstanding_cmds[pkt->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, pkt->handle, sp, sp->state));
		qla_printk(KERN_WARNING, ha,
		    "Command is NULL: already returned to OS (sp=%p)\n", sp);

		return;
	}

	if (ha->actthreads)
		ha->actthreads--;

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

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

		return;
	}

	sp->lun_queue->out_cnt--;

	comp_status = le16_to_cpu(pkt->comp_status);
	/* Mask of reserved bits 12-15, before we examine the scsi status */
	scsi_status = le16_to_cpu(pkt->scsi_status) & SS_MASK;
	lscsi_status = scsi_status & STATUS_MASK;

	CMD_ENTRY_STATUS(cp) = pkt->entry_status;
	CMD_COMPL_STATUS(cp) = comp_status;
	CMD_SCSI_STATUS(cp) = scsi_status;

	/* Generate LU queue on cntrl, target, LUN */
	b = cp->device->channel;
	t = cp->device->id;
	l = cp->device->lun,

	tq = sp->tgt_queue;
	lq = sp->lun_queue;

	/*
	 * If loop is in transient state Report DID_BUS_BUSY
	 */
	if ((comp_status != CS_COMPLETE || scsi_status != 0)) {
		if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
		    (atomic_read(&ha->loop_down_timer) ||
			atomic_read(&ha->loop_state) != LOOP_READY)) {

			DEBUG2(printk("scsi(%ld:%d:%d:%d): Loop Not Ready - "
			    "pid=%lx.\n",
			    ha->host_no, b, t, l, cp->serial_number));

			qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
			add_to_retry_queue(ha, sp);
			return;
		}
	}

	/* Check for any FCP transport errors. */
	if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
		rsp_info_len = le16_to_cpu(pkt->rsp_info_len);
		if (rsp_info_len > 3 && pkt->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, b, t, l,
			    rsp_info_len, pkt->rsp_info[0], pkt->rsp_info[1],
			    pkt->rsp_info[2], pkt->rsp_info[3],
			    pkt->rsp_info[4], pkt->rsp_info[5],
			    pkt->rsp_info[6], pkt->rsp_info[7]));

			cp->result = DID_BUS_BUSY << 16;
			add_to_done_queue(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 = le32_to_cpu(pkt->residual_length);
			cp->resid = resid;
			CMD_RESID_LEN(cp) = resid;
		}
		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