qla_isr.c

/*
 * QLogic Fibre Channel HBA Driver
 * Copyright (c)  2003-2008 QLogic Corporation
 *
 * See LICENSE.qla2xxx for copyright and licensing details.
 */
#include "qla_def.h"

#include <linux/delay.h>
#include <linux/slab.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_bsg_fc.h>
#include <scsi/scsi_eh.h>

static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
static void qla2x00_process_completed_request(struct scsi_qla_host *,
	struct req_que *, uint32_t);
static void qla2x00_status_entry(scsi_qla_host_t *, struct rsp_que *, void *);
static void qla2x00_status_cont_entry(struct rsp_que *, sts_cont_entry_t *);
static void qla2x00_error_entry(scsi_qla_host_t *, struct rsp_que *,
	sts_entry_t *);

/**
 * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
 * @irq:
 * @dev_id: SCSI driver HA context
 *
 * Called by system whenever the host adapter generates an interrupt.
 *
 * Returns handled flag.
 */
irqreturn_t
qla2100_intr_handler(int irq, void *dev_id)
{
	scsi_qla_host_t	*vha;
	struct qla_hw_data *ha;
	struct device_reg_2xxx __iomem *reg;
	int		status;
	unsigned long	iter;
	uint16_t	hccr;
	uint16_t	mb[4];
	struct rsp_que *rsp;
	unsigned long	flags;

	rsp = (struct rsp_que *) dev_id;
	if (!rsp) {
		printk(KERN_INFO
		    "%s(): NULL response queue pointer\n", __func__);
		return (IRQ_NONE);
	}

	ha = rsp->hw;
	reg = &ha->iobase->isp;
	status = 0;

	spin_lock_irqsave(&ha->hardware_lock, flags);
	vha = pci_get_drvdata(ha->pdev);
	for (iter = 50; iter--; ) {
		hccr = RD_REG_WORD(&reg->hccr);
		if (hccr & HCCR_RISC_PAUSE) {
			if (pci_channel_offline(ha->pdev))
				break;

			/*
			 * Issue a "HARD" reset in order for the RISC interrupt
			 * bit to be cleared.  Schedule a big hammmer to get
			 * out of the RISC PAUSED state.
			 */
			WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
			RD_REG_WORD(&reg->hccr);

			ha->isp_ops->fw_dump(vha, 1);
			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
			break;
		} else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
			break;

		if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
			WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
			RD_REG_WORD(&reg->hccr);

			/* Get mailbox data. */
			mb[0] = RD_MAILBOX_REG(ha, reg, 0);
			if (mb[0] > 0x3fff && mb[0] < 0x8000) {
				qla2x00_mbx_completion(vha, mb[0]);
				status |= MBX_INTERRUPT;
			} else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
				mb[1] = RD_MAILBOX_REG(ha, reg, 1);
				mb[2] = RD_MAILBOX_REG(ha, reg, 2);
				mb[3] = RD_MAILBOX_REG(ha, reg, 3);
				qla2x00_async_event(vha, rsp, mb);
			} else {
				/*EMPTY*/
				DEBUG2(printk("scsi(%ld): Unrecognized "
				    "interrupt type (%d).\n",
				    vha->host_no, mb[0]));
			}
			/* Release mailbox registers. */
			WRT_REG_WORD(&reg->semaphore, 0);
			RD_REG_WORD(&reg->semaphore);
		} else {
			qla2x00_process_response_queue(rsp);

			WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
			RD_REG_WORD(&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) {
		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
		complete(&ha->mbx_intr_comp);
	}

	return (IRQ_HANDLED);
}

/**
 * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 * @irq:
 * @dev_id: SCSI driver HA context
 *
 * Called by system whenever the host adapter generates an interrupt.
 *
 * Returns handled flag.
 */
irqreturn_t
qla2300_intr_handler(int irq, void *dev_id)
{
	scsi_qla_host_t	*vha;
	struct device_reg_2xxx __iomem *reg;
	int		status;
	unsigned long	iter;
	uint32_t	stat;
	uint16_t	hccr;
	uint16_t	mb[4];
	struct rsp_que *rsp;
	struct qla_hw_data *ha;
	unsigned long	flags;

	rsp = (struct rsp_que *) dev_id;
	if (!rsp) {
		printk(KERN_INFO
		    "%s(): NULL response queue pointer\n", __func__);
		return (IRQ_NONE);
	}

	ha = rsp->hw;
	reg = &ha->iobase->isp;
	status = 0;

	spin_lock_irqsave(&ha->hardware_lock, flags);
	vha = pci_get_drvdata(ha->pdev);
	for (iter = 50; iter--; ) {
		stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
		if (stat & HSR_RISC_PAUSED) {
			if (unlikely(pci_channel_offline(ha->pdev)))
				break;

			hccr = RD_REG_WORD(&reg->hccr);
			if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
				qla_printk(KERN_INFO, ha, "Parity error -- "
				    "HCCR=%x, Dumping firmware!\n", hccr);
			else
				qla_printk(KERN_INFO, ha, "RISC paused -- "
				    "HCCR=%x, Dumping firmware!\n", hccr);

			/*
			 * Issue a "HARD" reset in order for the RISC
			 * interrupt bit to be cleared.  Schedule a big
			 * hammmer to get out of the RISC PAUSED state.
			 */
			WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
			RD_REG_WORD(&reg->hccr);

			ha->isp_ops->fw_dump(vha, 1);
			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
			break;
		} else if ((stat & HSR_RISC_INT) == 0)
			break;

		switch (stat & 0xff) {
		case 0x1:
		case 0x2:
		case 0x10:
		case 0x11:
			qla2x00_mbx_completion(vha, MSW(stat));
			status |= MBX_INTERRUPT;

			/* Release mailbox registers. */
			WRT_REG_WORD(&reg->semaphore, 0);
			break;
		case 0x12:
			mb[0] = MSW(stat);
			mb[1] = RD_MAILBOX_REG(ha, reg, 1);
			mb[2] = RD_MAILBOX_REG(ha, reg, 2);
			mb[3] = RD_MAILBOX_REG(ha, reg, 3);
			qla2x00_async_event(vha, rsp, mb);
			break;
		case 0x13:
			qla2x00_process_response_queue(rsp);
			break;
		case 0x15:
			mb[0] = MBA_CMPLT_1_16BIT;
			mb[1] = MSW(stat);
			qla2x00_async_event(vha, rsp, mb);
			break;
		case 0x16:
			mb[0] = MBA_SCSI_COMPLETION;
			mb[1] = MSW(stat);
			mb[2] = RD_MAILBOX_REG(ha, reg, 2);
			qla2x00_async_event(vha, rsp, mb);
			break;
		default:
			DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
			    "(%d).\n",
			    vha->host_no, stat & 0xff));
			break;
		}
		WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
		RD_REG_WORD_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) {
		set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
		complete(&ha->mbx_intr_comp);
	}

	return (IRQ_HANDLED);
}

/**
 * qla2x00_mbx_completion() - Process mailbox command completions.
 * @ha: SCSI driver HA context
 * @mb0: Mailbox0 register
 */
static void
qla2x00_mbx_completion(scsi_qla_host_t *vha, uint16_t mb0)
{
	uint16_t	cnt;
	uint16_t __iomem *wptr;
	struct qla_hw_data *ha = vha->hw;
	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;

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

	for (cnt = 1; cnt < ha->mbx_count; cnt++) {
		if (IS_QLA2200(ha) && cnt == 8)
			wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
		if (cnt == 4 || cnt == 5)
			ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
		else
			ha->mailbox_out[cnt] = RD_REG_WORD(wptr);

		wptr++;
	}

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

static void
qla81xx_idc_event(scsi_qla_host_t *vha, uint16_t aen, uint16_t descr)
{
	static char *event[] =
		{ "Complete", "Request Notification", "Time Extension" };
	int rval;
	struct device_reg_24xx __iomem *reg24 = &vha->hw->iobase->isp24;
	uint16_t __iomem *wptr;
	uint16_t cnt, timeout, mb[QLA_IDC_ACK_REGS];

	/* Seed data -- mailbox1 -> mailbox7. */
	wptr = (uint16_t __iomem *)&reg24->mailbox1;
	for (cnt = 0; cnt < QLA_IDC_ACK_REGS; cnt++, wptr++)
		mb[cnt] = RD_REG_WORD(wptr);

	DEBUG2(printk("scsi(%ld): Inter-Driver Commucation %s -- "
	    "%04x %04x %04x %04x %04x %04x %04x.\n", vha->host_no,
	    event[aen & 0xff],
	    mb[0], mb[1], mb[2], mb[3], mb[4], mb[5], mb[6]));

	/* Acknowledgement needed? [Notify && non-zero timeout]. */
	timeout = (descr >> 8) & 0xf;
	if (aen != MBA_IDC_NOTIFY || !timeout)
		return;

	DEBUG2(printk("scsi(%ld): Inter-Driver Commucation %s -- "
	    "ACK timeout=%d.\n", vha->host_no, event[aen & 0xff], timeout));

	rval = qla2x00_post_idc_ack_work(vha, mb);
	if (rval != QLA_SUCCESS)
		qla_printk(KERN_WARNING, vha->hw,
		    "IDC failed to post ACK.\n");
}

/**
 * qla2x00_async_event() - Process aynchronous events.
 * @ha: SCSI driver HA context
 * @mb: Mailbox registers (0 - 3)
 */
void
qla2x00_async_event(scsi_qla_host_t *vha, struct rsp_que *rsp, uint16_t *mb)
{
#define LS_UNKNOWN	2
	static char	*link_speeds[] = { "1", "2", "?", "4", "8", "10" };
	char		*link_speed;
	uint16_t	handle_cnt;
	uint16_t	cnt, mbx;
	uint32_t	handles[5];
	struct qla_hw_data *ha = vha->hw;
	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
	struct device_reg_24xx __iomem *reg24 = &ha->iobase->isp24;
	uint32_t	rscn_entry, host_pid;
	uint8_t		rscn_queue_index;
	unsigned long	flags;

	/* Setup to process RIO completion. */
	handle_cnt = 0;
	if (IS_QLA8XXX_TYPE(ha))
		goto skip_rio;
	switch (mb[0]) {
	case MBA_SCSI_COMPLETION:
		handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
		handle_cnt = 1;
		break;
	case MBA_CMPLT_1_16BIT:
		handles[0] = mb[1];
		handle_cnt = 1;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_2_16BIT:
		handles[0] = mb[1];
		handles[1] = mb[2];
		handle_cnt = 2;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_3_16BIT:
		handles[0] = mb[1];
		handles[1] = mb[2];
		handles[2] = mb[3];
		handle_cnt = 3;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_4_16BIT:
		handles[0] = mb[1];
		handles[1] = mb[2];
		handles[2] = mb[3];
		handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
		handle_cnt = 4;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_5_16BIT:
		handles[0] = mb[1];
		handles[1] = mb[2];
		handles[2] = mb[3];
		handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
		handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
		handle_cnt = 5;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_2_32BIT:
		handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
		handles[1] = le32_to_cpu(
		    ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
		    RD_MAILBOX_REG(ha, reg, 6));
		handle_cnt = 2;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	default:
		break;
	}
skip_rio:
	switch (mb[0]) {
	case MBA_SCSI_COMPLETION:	/* Fast Post */
		if (!vha->flags.online)
			break;

		for (cnt = 0; cnt < handle_cnt; cnt++)
			qla2x00_process_completed_request(vha, rsp->req,
				handles[cnt]);
		break;

	case MBA_RESET:			/* Reset */
		DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n",
			vha->host_no));

		set_bit(RESET_MARKER_NEEDED, &vha->dpc_flags);
		break;

	case MBA_SYSTEM_ERR:		/* System Error */
		mbx = IS_QLA81XX(ha) ? RD_REG_WORD(&reg24->mailbox7) : 0;
		qla_printk(KERN_INFO, ha,
		    "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh "
		    "mbx7=%xh.\n", mb[1], mb[2], mb[3], mbx);

		ha->isp_ops->fw_dump(vha, 1);

		if (IS_FWI2_CAPABLE(ha)) {
			if (mb[1] == 0 && mb[2] == 0) {
				qla_printk(KERN_ERR, ha,
				    "Unrecoverable Hardware Error: adapter "
				    "marked OFFLINE!\n");
				vha->flags.online = 0;
			} else
				set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
		} else if (mb[1] == 0) {
			qla_printk(KERN_INFO, ha,
			    "Unrecoverable Hardware Error: adapter marked "
			    "OFFLINE!\n");
			vha->flags.online = 0;
		} else
			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
		break;

	case MBA_REQ_TRANSFER_ERR:	/* Request Transfer Error */
		DEBUG2(printk("scsi(%ld): ISP Request Transfer Error (%x).\n",
		    vha->host_no, mb[1]));
		qla_printk(KERN_WARNING, ha,
		    "ISP Request Transfer Error (%x).\n", mb[1]);

		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
		break;

	case MBA_RSP_TRANSFER_ERR:	/* Response Transfer Error */
		DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
		    vha->host_no));
		qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");

		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
		break;

	case MBA_WAKEUP_THRES:		/* Request Queue Wake-up */
		DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
		    vha->host_no));
		break;

	case MBA_LIP_OCCURRED:		/* Loop Initialization Procedure */
		DEBUG2(printk("scsi(%ld): LIP occurred (%x).\n", vha->host_no,
		    mb[1]));
		qla_printk(KERN_INFO, ha, "LIP occurred (%x).\n", mb[1]);

		if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
			atomic_set(&vha->loop_state, LOOP_DOWN);
			atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
			qla2x00_mark_all_devices_lost(vha, 1);
		}

		if (vha->vp_idx) {
			atomic_set(&vha->vp_state, VP_FAILED);
			fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
		}

		set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
		set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);

		vha->flags.management_server_logged_in = 0;
		qla2x00_post_aen_work(vha, FCH_EVT_LIP, mb[1]);
		break;

	case MBA_LOOP_UP:		/* Loop Up Event */
		if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
			link_speed = link_speeds[0];
			ha->link_data_rate = PORT_SPEED_1GB;
		} else {
			link_speed = link_speeds[LS_UNKNOWN];
			if (mb[1] < 5)
				link_speed = link_speeds[mb[1]];
			else if (mb[1] == 0x13)
				link_speed = link_speeds[5];
			ha->link_data_rate = mb[1];
		}

		DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
		    vha->host_no, link_speed));
		qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
		    link_speed);

		vha->flags.management_server_logged_in = 0;
		qla2x00_post_aen_work(vha, FCH_EVT_LINKUP, ha->link_data_rate);
		break;

	case MBA_LOOP_DOWN:		/* Loop Down Event */
		mbx = IS_QLA81XX(ha) ? RD_REG_WORD(&reg24->mailbox4) : 0;
		DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN "
		    "(%x %x %x %x).\n", vha->host_no, mb[1], mb[2], mb[3],
		    mbx));
		qla_printk(KERN_INFO, ha,
		    "LOOP DOWN detected (%x %x %x %x).\n", mb[1], mb[2], mb[3],
		    mbx);

		if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
			atomic_set(&vha->loop_state, LOOP_DOWN);
			atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
			vha->device_flags |= DFLG_NO_CABLE;
			qla2x00_mark_all_devices_lost(vha, 1);
		}

		if (vha->vp_idx) {
			atomic_set(&vha->vp_state, VP_FAILED);
			fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
		}

		vha->flags.management_server_logged_in = 0;
		ha->link_data_rate = PORT_SPEED_UNKNOWN;
		qla2x00_post_aen_work(vha, FCH_EVT_LINKDOWN, 0);
		break;

	case MBA_LIP_RESET:		/* LIP reset occurred */
		DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
		    vha->host_no, mb[1]));
		qla_printk(KERN_INFO, ha,
		    "LIP reset occurred (%x).\n", mb[1]);

		if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
			atomic_set(&vha->loop_state, LOOP_DOWN);
			atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
			qla2x00_mark_all_devices_lost(vha, 1);
		}

		if (vha->vp_idx) {
			atomic_set(&vha->vp_state, VP_FAILED);
			fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
		}

		set_bit(RESET_MARKER_NEEDED, &vha->dpc_flags);

		ha->operating_mode = LOOP;
		vha->flags.management_server_logged_in = 0;
		qla2x00_post_aen_work(vha, FCH_EVT_LIPRESET, mb[1]);
		break;

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

		if (IS_QLA8XXX_TYPE(ha))
			DEBUG2(printk("scsi(%ld): DCBX Completed -- %04x %04x "
			    "%04x\n", vha->host_no, mb[1], mb[2], mb[3]));
		else
			DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE "
			    "received.\n", vha->host_no));

		/*
		 * Until there's a transition from loop down to loop up, treat
		 * this as loop down only.
		 */
		if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
			atomic_set(&vha->loop_state, LOOP_DOWN);
			if (!atomic_read(&vha->loop_down_timer))
				atomic_set(&vha->loop_down_timer,
				    LOOP_DOWN_TIME);
			qla2x00_mark_all_devices_lost(vha, 1);
		}

		if (vha->vp_idx) {
			atomic_set(&vha->vp_state, VP_FAILED);
			fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
		}

		if (!(test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags)))
			set_bit(RESET_MARKER_NEEDED, &vha->dpc_flags);

		set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
		set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);

		ha->flags.gpsc_supported = 1;
		vha->flags.management_server_logged_in = 0;
		break;

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

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

		if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
			atomic_set(&vha->loop_state, LOOP_DOWN);
			if (!atomic_read(&vha->loop_down_timer))
				atomic_set(&vha->loop_down_timer,
				    LOOP_DOWN_TIME);
			qla2x00_mark_all_devices_lost(vha, 1);
		}

		if (vha->vp_idx) {
			atomic_set(&vha->vp_state, VP_FAILED);
			fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
		}

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

	case MBA_PORT_UPDATE:		/* Port database update */
		/*
		 * Handle only global and vn-port update events
		 *
		 * Relevant inputs:
		 * mb[1] = N_Port handle of changed port
		 * OR 0xffff for global event
		 * mb[2] = New login state
		 * 7 = Port logged out
		 * mb[3] = LSB is vp_idx, 0xff = all vps
		 *
		 * Skip processing if:
		 *       Event is global, vp_idx is NOT all vps,
		 *           vp_idx does not match
		 *       Event is not global, vp_idx does not match
		 */
		if (IS_QLA2XXX_MIDTYPE(ha) &&
		    ((mb[1] == 0xffff && (mb[3] & 0xff) != 0xff) ||
			(mb[1] != 0xffff)) && vha->vp_idx != (mb[3] & 0xff))
			break;

		/* Global event -- port logout or port unavailable. */
		if (mb[1] == 0xffff && mb[2] == 0x7) {
			DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
			    vha->host_no));
			DEBUG(printk(KERN_INFO
			    "scsi(%ld): Port unavailable %04x %04x %04x.\n",
			    vha->host_no, mb[1], mb[2], mb[3]));

			if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
				atomic_set(&vha->loop_state, LOOP_DOWN);
				atomic_set(&vha->loop_down_timer,
				    LOOP_DOWN_TIME);
				vha->device_flags |= DFLG_NO_CABLE;
				qla2x00_mark_all_devices_lost(vha, 1);
			}

			if (vha->vp_idx) {
				atomic_set(&vha->vp_state, VP_FAILED);
				fc_vport_set_state(vha->fc_vport,
				    FC_VPORT_FAILED);
				qla2x00_mark_all_devices_lost(vha, 1);
			}

			vha->flags.management_server_logged_in = 0;
			ha->link_data_rate = PORT_SPEED_UNKNOWN;
			break;
		}

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

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

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

		qla2x00_mark_all_devices_lost(vha, 1);

		vha->flags.rscn_queue_overflow = 1;

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

	case MBA_RSCN_UPDATE:		/* State Change Registration */
		/* Check if the Vport has issued a SCR */
		if (vha->vp_idx && test_bit(VP_SCR_NEEDED, &vha->vp_flags))
			break;
		/* Only handle SCNs for our Vport index. */
		if (ha->flags.npiv_supported && vha->vp_idx != (mb[3] & 0xff))
			break;

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

		rscn_entry = ((mb[1] & 0xff) << 16) | mb[2];
		host_pid = (vha->d_id.b.domain << 16) | (vha->d_id.b.area << 8)
				| vha->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",
			    vha->host_no, host_pid));
			break;
		}

		/* Ignore reserved bits from RSCN-payload. */
		rscn_entry = ((mb[1] & 0x3ff) << 16) | mb[2];
		rscn_queue_index = vha->rscn_in_ptr + 1;
		if (rscn_queue_index == MAX_RSCN_COUNT)
			rscn_queue_index = 0;
		if (rscn_queue_index != vha->rscn_out_ptr) {
			vha->rscn_queue[vha->rscn_in_ptr] = rscn_entry;
			vha->rscn_in_ptr = rscn_queue_index;
		} else {
			vha->flags.rscn_queue_overflow = 1;
		}

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

		set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
		set_bit(RSCN_UPDATE, &vha->dpc_flags);
		qla2x00_post_aen_work(vha, FCH_EVT_RSCN, rscn_entry);
		break;

	/* case MBA_RIO_RESPONSE: */
	case MBA_ZIO_RESPONSE:
		DEBUG3(printk("scsi(%ld): [R|Z]IO update completion.\n",
		    vha->host_no));

		if (IS_FWI2_CAPABLE(ha))
			qla24xx_process_response_queue(vha, rsp);
		else
			qla2x00_process_response_queue(rsp);
		break;

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

	case MBA_TRACE_NOTIFICATION:
		DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
		vha->host_no, mb[1], mb[2]));
		break;

	case MBA_ISP84XX_ALERT:
		DEBUG2(printk("scsi(%ld): ISP84XX Alert Notification -- "
		    "%04x %04x %04x\n", vha->host_no, mb[1], mb[2], mb[3]));

		spin_lock_irqsave(&ha->cs84xx->access_lock, flags);
		switch (mb[1]) {
		case A84_PANIC_RECOVERY:
			qla_printk(KERN_INFO, ha, "Alert 84XX: panic recovery "
			    "%04x %04x\n", mb[2], mb[3]);
			break;
		case A84_OP_LOGIN_COMPLETE:
			ha->cs84xx->op_fw_version = mb[3] << 16 | mb[2];
			DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
			    "firmware version %x\n", ha->cs84xx->op_fw_version));
			break;
		case A84_DIAG_LOGIN_COMPLETE:
			ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
			DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
			    "diagnostic firmware version %x\n",
			    ha->cs84xx->diag_fw_version));
			break;
		case A84_GOLD_LOGIN_COMPLETE:
			ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
			ha->cs84xx->fw_update = 1;
			DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX: gold "
			    "firmware version %x\n",
			    ha->cs84xx->gold_fw_version));
			break;
		default:
			qla_printk(KERN_ERR, ha,
			    "Alert 84xx: Invalid Alert %04x %04x %04x\n",
			    mb[1], mb[2], mb[3]);
		}
		spin_unlock_irqrestore(&ha->cs84xx->access_lock, flags);
		break;
	case MBA_DCBX_START:
		DEBUG2(printk("scsi(%ld): DCBX Started -- %04x %04x %04x\n",
		    vha->host_no, mb[1], mb[2], mb[3]));
		break;
	case MBA_DCBX_PARAM_UPDATE:
		DEBUG2(printk("scsi(%ld): DCBX Parameters Updated -- "
		    "%04x %04x %04x\n", vha->host_no, mb[1], mb[2], mb[3]));
		break;
	case MBA_FCF_CONF_ERR:
		DEBUG2(printk("scsi(%ld): FCF Configuration Error -- "
		    "%04x %04x %04x\n", vha->host_no, mb[1], mb[2], mb[3]));
		break;
	case MBA_IDC_COMPLETE:
	case MBA_IDC_NOTIFY:
	case MBA_IDC_TIME_EXT:
		qla81xx_idc_event(vha, mb[0], mb[1]);
		break;
	}

	if (!vha->vp_idx && ha->num_vhosts)
		qla2x00_alert_all_vps(rsp, mb);
}

/**
 * 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 *vha,
				struct req_que *req, uint32_t index)
{
	srb_t *sp;
	struct qla_hw_data *ha = vha->hw;

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

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

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

		/* Save ISP completion status */
		sp->cmd->result = DID_OK << 16;
		qla2x00_sp_compl(ha, sp);
	} else {
		DEBUG2(printk("scsi(%ld) Req:%d: Invalid ISP SCSI completion"
			" handle(0x%x)\n", vha->host_no, req->id, index));
		qla_printk(KERN_WARNING, ha,
		    "Invalid ISP SCSI completion handle\n");

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

static srb_t *
qla2x00_get_sp_from_handle(scsi_qla_host_t *vha, const char *func,
    struct req_que *req, void *iocb)
{
	struct qla_hw_data *ha = vha->hw;
	sts_entry_t *pkt = iocb;
	srb_t *sp = NULL;
	uint16_t index;

	index = LSW(pkt->handle);
	if (index >= MAX_OUTSTANDING_COMMANDS) {
		qla_printk(KERN_WARNING, ha,
		    "%s: Invalid completion handle (%x).\n", func, index);
		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
		goto done;
	}
	sp = req->outstanding_cmds[index];
	if (!sp) {
		qla_printk(KERN_WARNING, ha,
		    "%s: Invalid completion handle (%x) -- timed-out.\n", func,
		    index);
		return sp;
	}
	if (sp->handle != index) {
		qla_printk(KERN_WARNING, ha,
		    "%s: SRB handle (%x) mismatch %x.\n", func, sp->handle,
		    index);
		return NULL;
	}

	req->outstanding_cmds[index] = NULL;

done:
	return sp;
}

static void
qla2x00_mbx_iocb_entry(scsi_qla_host_t *vha, struct req_que *req,
    struct mbx_entry *mbx)
{
	const char func[] = "MBX-IOCB";
	const char *type;
	fc_port_t *fcport;
	srb_t *sp;
	struct srb_iocb *lio;
	struct srb_ctx *ctx;
	uint16_t *data;
	uint16_t status;

	sp = qla2x00_get_sp_from_handle(vha, func, req, mbx);
	if (!sp)
		return;

	ctx = sp->ctx;
	lio = ctx->u.iocb_cmd;
	type = ctx->name;
	fcport = sp->fcport;
	data = lio->u.logio.data;

	data[0] = MBS_COMMAND_ERROR;
	data[1] = lio->u.logio.flags & SRB_LOGIN_RETRIED ?
	    QLA_LOGIO_LOGIN_RETRIED : 0;
	if (mbx->entry_status) {
		DEBUG2(printk(KERN_WARNING
		    "scsi(%ld:%x): Async-%s error entry - portid=%02x%02x%02x "
		    "entry-status=%x status=%x state-flag=%x "
		    "status-flags=%x.\n",
		    fcport->vha->host_no, sp->handle, type,
		    fcport->d_id.b.domain, fcport->d_id.b.area,
		    fcport->d_id.b.al_pa, mbx->entry_status,
		    le16_to_cpu(mbx->status), le16_to_cpu(mbx->state_flags),
		    le16_to_cpu(mbx->status_flags)));

		DEBUG2(qla2x00_dump_buffer((uint8_t *)mbx, sizeof(*mbx)));

		goto logio_done;
	}

	status = le16_to_cpu(mbx->status);
	if (status == 0x30 && ctx->type == SRB_LOGIN_CMD &&
	    le16_to_cpu(mbx->mb0) == MBS_COMMAND_COMPLETE)
		status = 0;
	if (!status && le16_to_cpu(mbx->mb0) == MBS_COMMAND_COMPLETE) {
		DEBUG2(printk(KERN_DEBUG
		    "scsi(%ld:%x): Async-%s complete - portid=%02x%02x%02x "
		    "mbx1=%x.\n",
		    fcport->vha->host_no, sp->handle, type,
		    fcport->d_id.b.domain, fcport->d_id.b.area,
		    fcport->d_id.b.al_pa, le16_to_cpu(mbx->mb1)));

		data[0] = MBS_COMMAND_COMPLETE;
		if (ctx->type == SRB_LOGIN_CMD) {
			fcport->port_type = FCT_TARGET;
			if (le16_to_cpu(mbx->mb1) & BIT_0)
				fcport->port_type = FCT_INITIATOR;
			else if (le16_to_cpu(mbx->mb1) & BIT_1)
				fcport->flags |= FCF_FCP2_DEVICE;
		}
		goto logio_done;
	}

	data[0] = le16_to_cpu(mbx->mb0);
	switch (data[0]) {
	case MBS_PORT_ID_USED:
		data[1] = le16_to_cpu(mbx->mb1);
		break;
	case MBS_LOOP_ID_USED:
		break;
	default:
		data[0] = MBS_COMMAND_ERROR;
		break;
	}

	DEBUG2(printk(KERN_WARNING
	    "scsi(%ld:%x): Async-%s failed - portid=%02x%02x%02x status=%x "
	    "mb0=%x mb1=%x mb2=%x mb6=%x mb7=%x.\n",
	    fcport->vha->host_no, sp->handle, type, fcport->d_id.b.domain,
	    fcport->d_id.b.area, fcport->d_id.b.al_pa, status,
	    le16_to_cpu(mbx->mb0), le16_to_cpu(mbx->mb1),
	    le16_to_cpu(mbx->mb2), le16_to_cpu(mbx->mb6),
	    le16_to_cpu(mbx->mb7)));

logio_done:
	lio->done(sp);
}

static void
qla24xx_els_ct_entry(scsi_qla_host_t *vha, struct req_que *req,
    struct sts_entry_24xx *pkt, int iocb_type)
{
	const char func[] = "ELS_CT_IOCB";
	const char *type;
	struct qla_hw_data *ha = vha->hw;
	srb_t *sp;
	struct srb_ctx *sp_bsg;
	struct fc_bsg_job *bsg_job;
	uint16_t comp_status;
	uint32_t fw_status[3];
	uint8_t* fw_sts_ptr;

	sp = qla2x00_get_sp_from_handle(vha, func, req, pkt);
	if (!sp)
		return;
	sp_bsg = sp->ctx;
	bsg_job = sp_bsg->u.bsg_job;

	type = NULL;
	switch (sp_bsg->type) {
	case SRB_ELS_CMD_RPT:
	case SRB_ELS_CMD_HST:
		type = "els";
		break;
	case SRB_CT_CMD:
		type = "ct pass-through";
		break;
	default:
		qla_printk(KERN_WARNING, ha,
		    "%s: Unrecognized SRB: (%p) type=%d.\n", func, sp,
		    sp_bsg->type);
		return;
	}

	comp_status = fw_status[0] = le16_to_cpu(pkt->comp_status);
	fw_status[1] = le16_to_cpu(((struct els_sts_entry_24xx*)pkt)->error_subcode_1);
	fw_status[2] = le16_to_cpu(((struct els_sts_entry_24xx*)pkt)->error_subcode_2);

	/* return FC_CTELS_STATUS_OK and leave the decoding of the ELS/CT
	 * fc payload  to the caller
	 */
	bsg_job->reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
	bsg_job->reply_len = sizeof(struct fc_bsg_reply) + sizeof(fw_status);

	if (comp_status != CS_COMPLETE) {
		if (comp_status == CS_DATA_UNDERRUN) {
			bsg_job->reply->result = DID_OK << 16;
			bsg_job->reply->reply_payload_rcv_len =
				le16_to_cpu(((struct els_sts_entry_24xx*)pkt)->total_byte_count);

			DEBUG2(qla_printk(KERN_WARNING, ha,
			    "scsi(%ld:0x%x): ELS-CT pass-through-%s error comp_status-status=0x%x "
			    "error subcode 1=0x%x error subcode 2=0x%x total_byte = 0x%x.\n",
				vha->host_no, sp->handle, type, comp_status, fw_status[1], fw_status[2],
				le16_to_cpu(((struct els_sts_entry_24xx*)pkt)->total_byte_count)));
			fw_sts_ptr = ((uint8_t*)bsg_job->req->sense) + sizeof(struct fc_bsg_reply);
			memcpy( fw_sts_ptr, fw_status, sizeof(fw_status));
		}
		else {
			DEBUG2(qla_printk(KERN_WARNING, ha,
			    "scsi(%ld:0x%x): ELS-CT pass-through-%s error comp_status-status=0x%x "
			    "error subcode 1=0x%x error subcode 2=0x%x.\n",
				vha->host_no, sp->handle, type, comp_status,
				le16_to_cpu(((