qla_isr.c

linux-2.6.15.6

				    "frame(s) detected (%x of %x bytes)..."
				    "retrying command.\n", ha->host_no,
				    cp->device->channel, cp->device->id,
				    cp->device->lun, resid,
				    cp->request_bufflen));

				cp->result = DID_BUS_BUSY << 16;
				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,
				    cp->device->channel, cp->device->id,
				    cp->device->lun, 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, cp->device->id, cp->device->lun, 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, resid_len));

		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.
		 */
		DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
		    "pid=%ld, compl status=0x%x, port state=0x%x\n",
		    ha->host_no, cp->device->id, cp->device->lun,
		    cp->serial_number, comp_status,
		    atomic_read(&fcport->state)));

		cp->result = DID_BUS_BUSY << 16;
		if (atomic_read(&fcport->state) == FCS_ONLINE) {
			qla2x00_mark_device_lost(ha, fcport, 1);
		}
		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));

		cp->result = DID_RESET << 16;
		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:
		cp->result = DID_BUS_BUSY << 16;

		if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
			DEBUG2(printk(KERN_INFO
			    "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
			    "0x%x-0x%x\n", ha->host_no, cp->device->channel,
			    cp->device->id, cp->device->lun, comp_status,
			    scsi_status));
			break;
		}
		DEBUG2(printk(KERN_INFO
		    "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
		    "sflags=%x.\n", ha->host_no, cp->device->channel,
		    cp->device->id, cp->device->lun, comp_status, scsi_status,
		    le16_to_cpu(sts->status_flags)));

		/* Check to see if logout occurred. */
		if ((le16_to_cpu(sts->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;

		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)
		qla2x00_sp_compl(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. */
		if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
			host_to_fcp_swap(pkt->data, sizeof(pkt->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) {
			ha->status_srb = NULL;
			qla2x00_sp_compl(ha, sp);
		}
	}
}

/**
 * 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;

		/* 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;
		}
		qla2x00_sp_compl(ha, sp);

	} else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
	    COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
		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;

	qla2x00_sp_compl(ha, sp);
}


/**
 * qla24xx_mbx_completion() - Process mailbox command completions.
 * @ha: SCSI driver HA context
 * @mb0: Mailbox0 register
 */
static void
qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
{
	uint16_t	cnt;
	uint16_t __iomem *wptr;
	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;

	/* Load return mailbox registers. */
	ha->flags.mbox_int = 1;
	ha->mailbox_out[0] = mb0;
	wptr = (uint16_t __iomem *)&reg->mailbox1;

	for (cnt = 1; cnt < ha->mbx_count; cnt++) {
		ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
		wptr++;
	}

	if (ha->mcp) {
		DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
		    __func__, ha->host_no, ha->mcp->mb[0]));
	} else {
		DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
		    __func__, ha->host_no));
	}
}

/**
 * qla24xx_process_response_queue() - Process response queue entries.
 * @ha: SCSI driver HA context
 */
void
qla24xx_process_response_queue(struct scsi_qla_host *ha)
{
	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
	struct sts_entry_24xx *pkt;

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

	while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
		pkt = (struct sts_entry_24xx *)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, (sts_entry_t *) pkt);
			((response_t *)pkt)->signature = RESPONSE_PROCESSED;
			wmb();
			continue;
		}

		switch (pkt->entry_type) {
		case STATUS_TYPE:
			qla2x00_status_entry(ha, pkt);
			break;
		case STATUS_CONT_TYPE:
			qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
			break;
		case MS_IOCB_TYPE:
			qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
			break;
		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_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
}

/**
 * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 * @irq:
 * @dev_id: SCSI driver HA context
 * @regs:
 *
 * Called by system whenever the host adapter generates an interrupt.
 *
 * Returns handled flag.
 */
irqreturn_t
qla24xx_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
{
	scsi_qla_host_t	*ha;
	struct device_reg_24xx __iomem *reg;
	int		status;
	unsigned long	flags;
	unsigned long	iter;
	uint32_t	stat;
	uint32_t	hccr;
	uint16_t	mb[4];

	ha = (scsi_qla_host_t *) dev_id;
	if (!ha) {
		printk(KERN_INFO
		    "%s(): NULL host pointer\n", __func__);
		return IRQ_NONE;
	}

	reg = &ha->iobase->isp24;
	status = 0;

	spin_lock_irqsave(&ha->hardware_lock, flags);
	for (iter = 50; iter--; ) {
		stat = RD_REG_DWORD(&reg->host_status);
		if (stat & HSRX_RISC_PAUSED) {
			hccr = RD_REG_DWORD(&reg->hccr);

			qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
			    "Dumping firmware!\n", hccr);
			qla24xx_fw_dump(ha, 1);

			set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
			break;
		} else if ((stat & HSRX_RISC_INT) == 0)
			break;

		switch (stat & 0xff) {
		case 0x1:
		case 0x2:
		case 0x10:
		case 0x11:
			qla24xx_mbx_completion(ha, MSW(stat));
			status |= MBX_INTERRUPT;

			break;
		case 0x12:
			mb[0] = MSW(stat);
			mb[1] = RD_REG_WORD(&reg->mailbox1);
			mb[2] = RD_REG_WORD(&reg->mailbox2);
			mb[3] = RD_REG_WORD(&reg->mailbox3);
			qla2x00_async_event(ha, mb);
			break;
		case 0x13:
			qla24xx_process_response_queue(ha);
			break;
		default:
			DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
			    "(%d).\n",
			    ha->host_no, stat & 0xff));
			break;
		}
		WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
		RD_REG_DWORD_RELAXED(&reg->hccr);
	}
	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
	    (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
		spin_lock_irqsave(&ha->mbx_reg_lock, flags);

		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
		up(&ha->mbx_intr_sem);

		spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
	}

	return IRQ_HANDLED;
}

/**
 * qla24xx_ms_entry() - Process a Management Server entry.
 * @ha: SCSI driver HA context
 * @index: Response queue out pointer
 */
static void
qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
{
	srb_t          *sp;

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

	DEBUG9(printk("%s: ct pkt dump:\n", __func__);)
	DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx));)

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

	if (sp == NULL) {
		DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
		    ha->host_no));
		DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
		    ha->host_no));
		qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
		    pkt->handle);

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

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

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

	qla2x00_sp_compl(ha, sp);
}