qla_isr.c 40.3 KB
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/*
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 * QLogic Fibre Channel HBA Driver
 * Copyright (c)  2003-2005 QLogic Corporation
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 *
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 * See LICENSE.qla2xxx for copyright and licensing details.
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 */
#include "qla_def.h"

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#include <scsi/scsi_tcq.h>

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static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
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static void qla2x00_async_event(scsi_qla_host_t *, uint16_t *);
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static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
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static void qla2x00_status_entry(scsi_qla_host_t *, void *);
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static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
static void qla2x00_ms_entry(scsi_qla_host_t *, ms_iocb_entry_t *);

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static void qla24xx_ms_entry(scsi_qla_host_t *, struct ct_entry_24xx *);

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/**
 * 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
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qla2100_intr_handler(int irq, void *dev_id)
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{
	scsi_qla_host_t	*ha;
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	struct device_reg_2xxx __iomem *reg;
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	int		status;
	unsigned long	flags;
	unsigned long	iter;
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	uint16_t	mb[4];
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	ha = (scsi_qla_host_t *) dev_id;
	if (!ha) {
		printk(KERN_INFO
		    "%s(): NULL host pointer\n", __func__);
		return (IRQ_NONE);
	}

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

	spin_lock_irqsave(&ha->hardware_lock, flags);
	for (iter = 50; iter--; ) {
		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. */
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			mb[0] = RD_MAILBOX_REG(ha, reg, 0);
			if (mb[0] > 0x3fff && mb[0] < 0x8000) {
				qla2x00_mbx_completion(ha, mb[0]);
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				status |= MBX_INTERRUPT;
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			} 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(ha, mb);
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			} else {
				/*EMPTY*/
				DEBUG2(printk("scsi(%ld): Unrecognized "
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				    "interrupt type (%d).\n",
				    ha->host_no, mb[0]));
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			}
			/* Release mailbox registers. */
			WRT_REG_WORD(&reg->semaphore, 0);
			RD_REG_WORD(&reg->semaphore);
		} else {
			qla2x00_process_response_queue(ha);

			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) {
		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);
}

/**
 * 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
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qla2300_intr_handler(int irq, void *dev_id)
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{
	scsi_qla_host_t	*ha;
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	struct device_reg_2xxx __iomem *reg;
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	int		status;
	unsigned long	flags;
	unsigned long	iter;
	uint32_t	stat;
	uint16_t	hccr;
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	uint16_t	mb[4];
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	ha = (scsi_qla_host_t *) dev_id;
	if (!ha) {
		printk(KERN_INFO
		    "%s(): NULL host pointer\n", __func__);
		return (IRQ_NONE);
	}

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

	spin_lock_irqsave(&ha->hardware_lock, flags);
	for (iter = 50; iter--; ) {
		stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
		if (stat & HSR_RISC_PAUSED) {
			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.\n", hccr);
			else
				qla_printk(KERN_INFO, ha,
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				    "RISC paused -- HCCR=%x.\n", hccr);
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			/*
			 * 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);
			set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
			break;
		} else if ((stat & HSR_RISC_INT) == 0)
			break;

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

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

/**
 * qla2x00_mbx_completion() - Process mailbox command completions.
 * @ha: SCSI driver HA context
 * @mb0: Mailbox0 register
 */
static void
qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
{
	uint16_t	cnt;
	uint16_t __iomem *wptr;
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	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
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	/* 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++) {
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		if (IS_QLA2200(ha) && cnt == 8)
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			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);
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		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));
	}
}

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

	/* Setup to process RIO completion. */
	handle_cnt = 0;
	switch (mb[0]) {
	case MBA_SCSI_COMPLETION:
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		handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
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		handle_cnt = 1;
		break;
	case MBA_CMPLT_1_16BIT:
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		handles[0] = mb[1];
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		handle_cnt = 1;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_2_16BIT:
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		handles[0] = mb[1];
		handles[1] = mb[2];
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		handle_cnt = 2;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_3_16BIT:
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		handles[0] = mb[1];
		handles[1] = mb[2];
		handles[2] = mb[3];
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		handle_cnt = 3;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_4_16BIT:
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		handles[0] = mb[1];
		handles[1] = mb[2];
		handles[2] = mb[3];
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		handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
		handle_cnt = 4;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_5_16BIT:
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		handles[0] = mb[1];
		handles[1] = mb[2];
		handles[2] = mb[3];
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		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:
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		handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
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		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;
	}

	switch (mb[0]) {
	case MBA_SCSI_COMPLETION:	/* Fast Post */
		if (!ha->flags.online)
			break;

		for (cnt = 0; cnt < handle_cnt; cnt++)
			qla2x00_process_completed_request(ha, handles[cnt]);
		break;

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

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

	case MBA_SYSTEM_ERR:		/* System Error */
		mb[1] = RD_MAILBOX_REG(ha, reg, 1);
		mb[2] = RD_MAILBOX_REG(ha, reg, 2);
		mb[3] = RD_MAILBOX_REG(ha, reg, 3);

		qla_printk(KERN_INFO, ha,
		    "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
		    mb[1], mb[2], mb[3]);

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		ha->isp_ops.fw_dump(ha, 1);
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		if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
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			if (mb[1] == 0 && mb[2] == 0) {
				qla_printk(KERN_ERR, ha,
				    "Unrecoverable Hardware Error: adapter "
				    "marked OFFLINE!\n");
				ha->flags.online = 0;
			} else
				set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
		} else if (mb[1] == 0) {
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			qla_printk(KERN_INFO, ha,
			    "Unrecoverable Hardware Error: adapter marked "
			    "OFFLINE!\n");
			ha->flags.online = 0;
		} else
			set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
		break;

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

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

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

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

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

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

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

		set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);

		ha->flags.management_server_logged_in = 0;
		break;

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

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

		ha->flags.management_server_logged_in = 0;
		break;

	case MBA_LOOP_DOWN:		/* Loop Down Event */
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		DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
		    ha->host_no, mb[1]));
		qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x).\n", mb[1]);
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		if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
			atomic_set(&ha->loop_state, LOOP_DOWN);
			atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
			ha->device_flags |= DFLG_NO_CABLE;
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			qla2x00_mark_all_devices_lost(ha, 1);
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		}

		ha->flags.management_server_logged_in = 0;
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		ha->link_data_rate = PORT_SPEED_UNKNOWN;
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		if (ql2xfdmienable)
			set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
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		break;

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

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

		set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);

		ha->operating_mode = LOOP;
		ha->flags.management_server_logged_in = 0;
		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);
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			qla2x00_mark_all_devices_lost(ha, 1);
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		}

		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;

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

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

	case MBA_PORT_UPDATE:		/* Port database update */
		/*
		 * 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 "
512 513
			    "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
			    mb[2], mb[3]));
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			break;
		}

		DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
		    ha->host_no));
		DEBUG(printk(KERN_INFO
520 521
		    "scsi(%ld): Port database changed %04x %04x %04x.\n",
		    ha->host_no, mb[1], mb[2], mb[3]));
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		/*
		 * Mark all devices as missing so we will login again.
		 */
		atomic_set(&ha->loop_state, LOOP_UP);

528
		qla2x00_mark_all_devices_lost(ha, 1);
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		ha->flags.rscn_queue_overflow = 1;

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

580
		if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
581 582 583
			qla24xx_process_response_queue(ha);
		else
			qla2x00_process_response_queue(ha);
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		break;
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	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;
590 591 592 593 594

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

598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656
static void
qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
{
	fc_port_t *fcport = data;

	if (fcport->ha->max_q_depth <= sdev->queue_depth)
		return;

	if (sdev->ordered_tags)
		scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
		    sdev->queue_depth + 1);
	else
		scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
		    sdev->queue_depth + 1);

	fcport->last_ramp_up = jiffies;

	DEBUG2(qla_printk(KERN_INFO, fcport->ha,
	    "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
	    fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
	    sdev->queue_depth));
}

static void
qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
{
	fc_port_t *fcport = data;

	if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
		return;

	DEBUG2(qla_printk(KERN_INFO, fcport->ha,
	    "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
	    fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
	    sdev->queue_depth));
}

static inline void
qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
{
	fc_port_t *fcport;
	struct scsi_device *sdev;

	sdev = sp->cmd->device;
	if (sdev->queue_depth >= ha->max_q_depth)
		return;

	fcport = sp->fcport;
	if (time_before(jiffies,
	    fcport->last_ramp_up + ql2xqfullrampup * HZ))
		return;
	if (time_before(jiffies,
	    fcport->last_queue_full + ql2xqfullrampup * HZ))
		return;

	starget_for_each_device(sdev->sdev_target, fcport,
	    qla2x00_adjust_sdev_qdepth_up);
}

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/**
 * 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;
688 689

		qla2x00_ramp_up_queue_depth(ha, sp);
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		qla2x00_sp_compl(ha, sp);
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	} 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)
{
708
	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
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	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;
		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
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qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
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{
	srb_t		*sp;
	fc_port_t	*fcport;
	struct scsi_cmnd *cp;
788 789
	sts_entry_t *sts;
	struct sts_entry_24xx *sts24;
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	uint16_t	comp_status;
	uint16_t	scsi_status;
	uint8_t		lscsi_status;
	int32_t		resid;
794
	uint32_t	sense_len, rsp_info_len, resid_len, fw_resid_len;
795 796 797 798
	uint8_t		*rsp_info, *sense_data;

	sts = (sts_entry_t *) pkt;
	sts24 = (struct sts_entry_24xx *) pkt;
799
	if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
800 801 802 803 804 805
		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;
	}
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	/* Fast path completion. */
808 809
	if (comp_status == CS_COMPLETE && scsi_status == 0) {
		qla2x00_process_completed_request(ha, sts->handle);
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		return;
	}

	/* Validate handle. */
815 816 817
	if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
		sp = ha->outstanding_cmds[sts->handle];
		ha->outstanding_cmds[sts->handle] = NULL;
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	} 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);
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		qla2xxx_wake_dpc(ha);
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		return;
	}
	cp = sp->cmd;
	if (cp == NULL) {
		DEBUG2(printk("scsi(%ld): Command already returned back to OS "
833
		    "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
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		qla_printk(KERN_WARNING, ha,
		    "Command is NULL: already returned to OS (sp=%p)\n", sp);

		return;
	}

840 841
  	lscsi_status = scsi_status & STATUS_MASK;
	CMD_ENTRY_STATUS(cp) = sts->entry_status;
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	CMD_COMPL_STATUS(cp) = comp_status;
	CMD_SCSI_STATUS(cp) = scsi_status;

845
	fcport = sp->fcport;
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	sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
848
	if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
849 850 851
		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);
852
		fw_resid_len = le32_to_cpu(sts24->residual_len);
853 854 855 856 857 858 859 860 861 862 863
		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;
	}

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	/* Check for any FCP transport errors. */
	if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
866
		/* Sense data lies beyond any FCP RESPONSE data. */
867
		if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
868 869
			sense_data += rsp_info_len;
		if (rsp_info_len > 3 && rsp_info[3]) {
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			DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
			    "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
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			    "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]));
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			cp->result = DID_BUS_BUSY << 16;
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			qla2x00_sp_compl(ha, sp);
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			return;
		}
	}

	/*
	 * Based on Host and scsi status generate status code for Linux
	 */
	switch (comp_status) {
	case CS_COMPLETE:
889
	case CS_QUEUE_FULL:
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		if (scsi_status == 0) {
			cp->result = DID_OK << 16;
			break;
		}
		if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
895
			resid = resid_len;
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			cp->resid = resid;
			CMD_RESID_LEN(cp) = resid;
898 899 900 901 902 903 904 905 906 907 908 909 910 911 912

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

916 917 918 919 920 921 922 923 924 925 926 927
		if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
			DEBUG2(printk(KERN_INFO
			    "scsi(%ld): QUEUE FULL status detected "
			    "0x%x-0x%x.\n", ha->host_no, comp_status,
			    scsi_status));

			/* Adjust queue depth for all luns on the port. */
			fcport->last_queue_full = jiffies;
			starget_for_each_device(cp->device->sdev_target,
			    fcport, qla2x00_adjust_sdev_qdepth_down);
			break;
		}
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		if (lscsi_status != SS_CHECK_CONDITION)
			break;

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

		if (!(scsi_status & SS_SENSE_LEN_VALID))
			break;

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

		if (sp->request_sense_length > 32)
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			sense_len = 32;
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		memcpy(cp->sense_buffer, sense_data, sense_len);
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		sp->request_sense_ptr += sense_len;
		sp->request_sense_length -= sense_len;
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		if (sp->request_sense_length != 0)
			ha->status_srb = sp;

		DEBUG5(printk("%s(): Check condition Sense data, "
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		    "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)
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			DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
			    CMD_ACTUAL_SNSLEN(cp)));
		break;

	case CS_DATA_UNDERRUN:
964
		resid = resid_len;
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		/* Use F/W calculated residual length. */
		if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
			resid = fw_resid_len;

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		if (scsi_status & SS_RESIDUAL_UNDER) {
			cp->resid = resid;
			CMD_RESID_LEN(cp) = resid;
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		} else {
			DEBUG2(printk(KERN_INFO
			    "scsi(%ld:%d:%d) UNDERRUN status detected "
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			    "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
			    "os_underflow=0x%x\n", ha->host_no,
			    cp->device->id, cp->device->lun, comp_status,
			    scsi_status, resid_len, resid, cp->cmnd[0],
			    cp->underflow));
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		}

		/*
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		 * Check to see if SCSI Status is non zero. If so report SCSI
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		 * 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;

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

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			if (sp->request_sense_length > 32)
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				sense_len = 32;
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			memcpy(cp->sense_buffer, sense_data, sense_len);
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			sp->request_sense_ptr += sense_len;
			sp->request_sense_length -= sense_len;
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			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",
1018 1019
			    __func__, ha->host_no, cp->device->channel,
			    cp->device->id, cp->device->lun, cp,
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			    cp->serial_number));
1021 1022

			if (sense_len)
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				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)..."
1034 1035 1036
				    "retrying command.\n", ha->host_no,
				    cp->device->channel, cp->device->id,
				    cp->device->lun, resid,
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				    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 "
1049 1050 1051
				    "error status.\n", ha->host_no,
				    cp->device->channel, cp->device->id,
				    cp->device->lun, resid,
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				    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",
1066 1067
		    ha->host_no, cp->device->id, cp->device->lun, comp_status,
		    scsi_status));
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		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",
1075
		    cp->serial_number, cp->request_bufflen, resid_len));
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		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",
1092 1093
		    ha->host_no, cp->device->id, cp->device->lun,
		    cp->serial_number, comp_status,
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		    atomic_read(&fcport->state)));

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

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

	case CS_ABORTED:
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		/*
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		 * 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:
1124 1125
		cp->result = DID_BUS_BUSY << 16;

1126
		if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
1127 1128 1129 1130 1131 1132 1133
			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;
		}
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		DEBUG2(printk(KERN_INFO
		    "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1136 1137 1138
		    "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)));
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		/* Check to see if logout occurred. */
		if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
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			qla2x00_mark_device_lost(ha, fcport, 1, 1);
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		break;

	default:
		DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1147
		    "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
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		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)
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		qla2x00_sp_compl(ha, sp);
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}

/**
 * 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 "
1179
			    "sp=%p.\n", __func__, sp));
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			qla_printk(KERN_INFO, ha,
			    "cmd is NULL: already returned to OS (sp=%p)\n",
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			    sp);
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			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. */
1195
		if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
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			host_to_fcp_swap(pkt->data, sizeof(pkt->data));
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		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;
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			qla2x00_sp_compl(ha, sp);
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		}
	}
}

/**
 * qla2x00_error_entry() - Process an error entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 */
static void
1217
qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
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{
	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)
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		qla_printk(KERN_ERR, ha,
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		    "%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;
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		/* 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;
		}
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		qla2x00_sp_compl(ha, sp);
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	} else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
	    COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
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		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);
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		qla2xxx_wake_dpc(ha);
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	}
}

/**
 * qla2x00_ms_entry() - Process a Management Server entry.
 * @ha: SCSI driver HA context
 * @index: Response queue out pointer
 */
static void
1277
qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
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{
	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;

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	qla2x00_sp_compl(ha, sp);
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}
1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409


/**
 * 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
 *
 * Called by system whenever the host adapter generates an interrupt.
 *
 * Returns handled flag.
 */
irqreturn_t
1410
qla24xx_intr_handler(int irq, void *dev_id)
1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501
{
	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));

1502 1503
	DEBUG9(printk("%s: ct pkt dump:\n", __func__));
	DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531

	/* 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);
}