qla_isr.c 53.8 KB
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/*
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 * QLogic Fibre Channel HBA Driver
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 * Copyright (c)  2003-2008 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 <linux/delay.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_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 *);
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static void qla2x00_status_cont_entry(struct rsp_que *, sts_cont_entry_t *);
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static void qla2x00_error_entry(scsi_qla_host_t *, struct rsp_que *,
	sts_entry_t *);
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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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{
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	scsi_qla_host_t	*vha;
	struct qla_hw_data *ha;
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	struct device_reg_2xxx __iomem *reg;
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	int		status;
	unsigned long	iter;
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	uint16_t	hccr;
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	uint16_t	mb[4];
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	struct rsp_que *rsp;
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	rsp = (struct rsp_que *) dev_id;
	if (!rsp) {
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		printk(KERN_INFO
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		    "%s(): NULL response queue pointer\n", __func__);
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		return (IRQ_NONE);
	}

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

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	spin_lock(&ha->hardware_lock);
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	vha = pci_get_drvdata(ha->pdev);
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	for (iter = 50; iter--; ) {
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		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);

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			ha->isp_ops->fw_dump(vha, 1);
			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
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			break;
		} else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
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			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) {
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				qla2x00_mbx_completion(vha, 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);
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				qla2x00_async_event(vha, rsp, mb);
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			} else {
				/*EMPTY*/
				DEBUG2(printk("scsi(%ld): Unrecognized "
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				    "interrupt type (%d).\n",
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				    vha->host_no, mb[0]));
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			}
			/* Release mailbox registers. */
			WRT_REG_WORD(&reg->semaphore, 0);
			RD_REG_WORD(&reg->semaphore);
		} else {
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			qla2x00_process_response_queue(rsp);
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			WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
			RD_REG_WORD(&reg->hccr);
		}
	}
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	spin_unlock(&ha->hardware_lock);
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	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);
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		complete(&ha->mbx_intr_comp);
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	}

	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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{
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	scsi_qla_host_t	*vha;
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	struct device_reg_2xxx __iomem *reg;
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	int		status;
	unsigned long	iter;
	uint32_t	stat;
	uint16_t	hccr;
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	uint16_t	mb[4];
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	struct rsp_que *rsp;
	struct qla_hw_data *ha;
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	rsp = (struct rsp_que *) dev_id;
	if (!rsp) {
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		printk(KERN_INFO
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		    "%s(): NULL response queue pointer\n", __func__);
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		return (IRQ_NONE);
	}

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

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

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			hccr = RD_REG_WORD(&reg->hccr);
			if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
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				qla_printk(KERN_INFO, ha, "Parity error -- "
				    "HCCR=%x, Dumping firmware!\n", hccr);
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			else
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				qla_printk(KERN_INFO, ha, "RISC paused -- "
				    "HCCR=%x, Dumping firmware!\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);
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			ha->isp_ops->fw_dump(vha, 1);
			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
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			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(vha, 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);
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			qla2x00_async_event(vha, rsp, mb);
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			break;
		case 0x13:
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			qla2x00_process_response_queue(rsp);
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			break;
		case 0x15:
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			mb[0] = MBA_CMPLT_1_16BIT;
			mb[1] = MSW(stat);
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			qla2x00_async_event(vha, rsp, 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);
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			qla2x00_async_event(vha, rsp, mb);
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			break;
		default:
			DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
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			    "(%d).\n",
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			    vha->host_no, stat & 0xff));
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			break;
		}
		WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
		RD_REG_WORD_RELAXED(&reg->hccr);
	}
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	spin_unlock(&ha->hardware_lock);
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	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);
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		complete(&ha->mbx_intr_comp);
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	}

	return (IRQ_HANDLED);
}

/**
 * qla2x00_mbx_completion() - Process mailbox command completions.
 * @ha: SCSI driver HA context
 * @mb0: Mailbox0 register
 */
static void
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qla2x00_mbx_completion(scsi_qla_host_t *vha, uint16_t mb0)
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{
	uint16_t	cnt;
	uint16_t __iomem *wptr;
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	struct qla_hw_data *ha = vha->hw;
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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",
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		    __func__, vha->host_no, ha->mcp->mb[0]));
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	} else {
		DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
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		    __func__, vha->host_no));
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	}
}

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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");
}

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/**
 * qla2x00_async_event() - Process aynchronous events.
 * @ha: SCSI driver HA context
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 * @mb: Mailbox registers (0 - 3)
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 */
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void
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qla2x00_async_event(scsi_qla_host_t *vha, struct rsp_que *rsp, uint16_t *mb)
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{
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#define LS_UNKNOWN	2
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	static char	*link_speeds[] = { "1", "2", "?", "4", "8", "10" };
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	char		*link_speed;
	uint16_t	handle_cnt;
	uint16_t	cnt;
	uint32_t	handles[5];
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	struct qla_hw_data *ha = vha->hw;
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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;
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	unsigned long	flags;
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	/* Setup to process RIO completion. */
	handle_cnt = 0;
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	if (IS_QLA81XX(ha))
		goto skip_rio;
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	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;
	}
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skip_rio:
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	switch (mb[0]) {
	case MBA_SCSI_COMPLETION:	/* Fast Post */
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		if (!vha->flags.online)
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			break;

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

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

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

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

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

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

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

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

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

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

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		set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
		set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
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		vha->flags.management_server_logged_in = 0;
		qla2x00_post_aen_work(vha, FCH_EVT_LIP, mb[1]);
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		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 {
468
			link_speed = link_speeds[LS_UNKNOWN];
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			if (mb[1] < 5)
				link_speed = link_speeds[mb[1]];
471 472
			else if (mb[1] == 0x13)
				link_speed = link_speeds[5];
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			ha->link_data_rate = mb[1];
		}

		DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
477
		    vha->host_no, link_speed));
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		qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
		    link_speed);

481 482
		vha->flags.management_server_logged_in = 0;
		qla2x00_post_aen_work(vha, FCH_EVT_LINKUP, ha->link_data_rate);
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		break;

	case MBA_LOOP_DOWN:		/* Loop Down Event */
486
		DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN "
487
		    "(%x %x %x).\n", vha->host_no, mb[1], mb[2], mb[3]));
488 489
		qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x %x %x).\n",
		    mb[1], mb[2], mb[3]);
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491 492 493 494 495
		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);
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		}

498 499 500
		if (vha->vp_idx) {
			atomic_set(&vha->vp_state, VP_FAILED);
			fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
501 502
		}

503
		vha->flags.management_server_logged_in = 0;
504
		ha->link_data_rate = PORT_SPEED_UNKNOWN;
505
		qla2x00_post_aen_work(vha, FCH_EVT_LINKDOWN, 0);
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		break;

	case MBA_LIP_RESET:		/* LIP reset occurred */
		DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
510
		    vha->host_no, mb[1]));
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		qla_printk(KERN_INFO, ha,
512
		    "LIP reset occurred (%x).\n", mb[1]);
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514 515 516 517
		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);
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		}

520 521 522
		if (vha->vp_idx) {
			atomic_set(&vha->vp_state, VP_FAILED);
			fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
523 524
		}

525
		set_bit(RESET_MARKER_NEEDED, &vha->dpc_flags);
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		ha->operating_mode = LOOP;
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		vha->flags.management_server_logged_in = 0;
		qla2x00_post_aen_work(vha, FCH_EVT_LIPRESET, mb[1]);
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		break;

532
	/* case MBA_DCBX_COMPLETE: */
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	case MBA_POINT_TO_POINT:	/* Point-to-Point */
		if (IS_QLA2100(ha))
			break;

537 538 539 540 541 542
		if (IS_QLA81XX(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));
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		/*
		 * Until there's a transition from loop down to loop up, treat
		 * this as loop down only.
		 */
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		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,
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				    LOOP_DOWN_TIME);
553
			qla2x00_mark_all_devices_lost(vha, 1);
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		}

556 557 558
		if (vha->vp_idx) {
			atomic_set(&vha->vp_state, VP_FAILED);
			fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
559 560
		}

561 562 563 564 565
		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);
566 567

		ha->flags.gpsc_supported = 1;
568
		vha->flags.management_server_logged_in = 0;
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		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",
577
		    vha->host_no));
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		qla_printk(KERN_INFO, ha,
		    "Configuration change detected: value=%x.\n", mb[1]);

581 582 583 584
		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,
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				    LOOP_DOWN_TIME);
586
			qla2x00_mark_all_devices_lost(vha, 1);
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		}

589 590 591
		if (vha->vp_idx) {
			atomic_set(&vha->vp_state, VP_FAILED);
			fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
592 593
		}

594 595
		set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
		set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
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		break;

	case MBA_PORT_UPDATE:		/* Port database update */
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		/* Only handle SCNs for our Vport index. */
		if (vha->vp_idx && vha->vp_idx != (mb[3] & 0xff))
			break;

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		/*
604
		 * If PORT UPDATE is global (received LIP_OCCURRED/LIP_RESET
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		 * event etc. earlier indicating loop is down) then process
		 * it.  Otherwise ignore it and Wait for RSCN to come in.
		 */
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		atomic_set(&vha->loop_down_timer, 0);
		if (atomic_read(&vha->loop_state) != LOOP_DOWN &&
		    atomic_read(&vha->loop_state) != LOOP_DEAD) {
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			DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
612
			    "ignored %04x/%04x/%04x.\n", vha->host_no, mb[1],
613
			    mb[2], mb[3]));
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			break;
		}

		DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
618
		    vha->host_no));
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		DEBUG(printk(KERN_INFO
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		    "scsi(%ld): Port database changed %04x %04x %04x.\n",
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		    vha->host_no, mb[1], mb[2], mb[3]));
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		/*
		 * Mark all devices as missing so we will login again.
		 */
626
		atomic_set(&vha->loop_state, LOOP_UP);
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628
		qla2x00_mark_all_devices_lost(vha, 1);
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		vha->flags.rscn_queue_overflow = 1;
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		set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
		set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
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		break;

	case MBA_RSCN_UPDATE:		/* State Change Registration */
637
		/* Check if the Vport has issued a SCR */
638
		if (vha->vp_idx && test_bit(VP_SCR_NEEDED, &vha->vp_flags))
639 640
			break;
		/* Only handle SCNs for our Vport index. */
641
		if (vha->vp_idx && vha->vp_idx != (mb[3] & 0xff))
642
			break;
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		DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
644
		    vha->host_no));
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		DEBUG(printk(KERN_INFO
646
		    "scsi(%ld): RSCN database changed -- %04x %04x %04x.\n",
647
		    vha->host_no, mb[1], mb[2], mb[3]));
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649
		rscn_entry = ((mb[1] & 0xff) << 16) | mb[2];
650 651
		host_pid = (vha->d_id.b.domain << 16) | (vha->d_id.b.area << 8)
				| vha->d_id.b.al_pa;
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		if (rscn_entry == host_pid) {
			DEBUG(printk(KERN_INFO
			    "scsi(%ld): Ignoring RSCN update to local host "
			    "port ID (%06x)\n",
656
			    vha->host_no, host_pid));
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			break;
		}

660 661
		/* Ignore reserved bits from RSCN-payload. */
		rscn_entry = ((mb[1] & 0x3ff) << 16) | mb[2];
662
		rscn_queue_index = vha->rscn_in_ptr + 1;
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		if (rscn_queue_index == MAX_RSCN_COUNT)
			rscn_queue_index = 0;
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		if (rscn_queue_index != vha->rscn_out_ptr) {
			vha->rscn_queue[vha->rscn_in_ptr] = rscn_entry;
			vha->rscn_in_ptr = rscn_queue_index;
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		} else {
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			vha->flags.rscn_queue_overflow = 1;
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		}

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

	/* case MBA_RIO_RESPONSE: */
	case MBA_ZIO_RESPONSE:
683
		DEBUG3(printk("scsi(%ld): [R|Z]IO update completion.\n",
684
		    vha->host_no));
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686
		if (IS_FWI2_CAPABLE(ha))
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			qla24xx_process_response_queue(vha, rsp);
688
		else
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			qla2x00_process_response_queue(rsp);
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		break;
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	case MBA_DISCARD_RND_FRAME:
		DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
694
		    "%04x.\n", vha->host_no, mb[1], mb[2], mb[3]));
695
		break;
696 697 698

	case MBA_TRACE_NOTIFICATION:
		DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
699
		vha->host_no, mb[1], mb[2]));
700
		break;
701 702 703

	case MBA_ISP84XX_ALERT:
		DEBUG2(printk("scsi(%ld): ISP84XX Alert Notification -- "
704
		    "%04x %04x %04x\n", vha->host_no, mb[1], mb[2], mb[3]));
705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736

		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;
737 738 739 740 741 742 743 744 745 746 747 748 749 750 751
	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:
752
		qla81xx_idc_event(vha, mb[0], mb[1]);
753
		break;
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	}
755

756
	if (!vha->vp_idx && ha->num_vhosts)
757
		qla2x00_alert_all_vps(rsp, mb);
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}

760 761 762 763
static void
qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
{
	fc_port_t *fcport = data;
764 765 766 767
	struct scsi_qla_host *vha = fcport->vha;
	struct qla_hw_data *ha = vha->hw;
	struct req_que *req = NULL;

768
	req = vha->req;
769 770 771
	if (!req)
		return;
	if (req->max_q_depth <= sdev->queue_depth)
772 773 774 775 776 777 778 779 780 781 782
		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;

783
	DEBUG2(qla_printk(KERN_INFO, ha,
784
	    "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
785
	    fcport->vha->host_no, sdev->channel, sdev->id, sdev->lun,
786 787 788 789 790 791 792 793 794 795 796
	    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;

797
	DEBUG2(qla_printk(KERN_INFO, fcport->vha->hw,
798
	    "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
799
	    fcport->vha->host_no, sdev->channel, sdev->id, sdev->lun,
800 801 802 803
	    sdev->queue_depth));
}

static inline void
804 805
qla2x00_ramp_up_queue_depth(scsi_qla_host_t *vha, struct req_que *req,
								srb_t *sp)
806 807 808 809 810
{
	fc_port_t *fcport;
	struct scsi_device *sdev;

	sdev = sp->cmd->device;
811
	if (sdev->queue_depth >= req->max_q_depth)
812 813 814 815 816 817 818 819 820 821 822 823 824 825
		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
832 833
qla2x00_process_completed_request(struct scsi_qla_host *vha,
				struct req_que *req, uint32_t index)
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{
	srb_t *sp;
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	struct qla_hw_data *ha = vha->hw;
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	/* Validate handle. */
	if (index >= MAX_OUTSTANDING_COMMANDS) {
		DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
841
		    vha->host_no, index));
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		qla_printk(KERN_WARNING, ha,
		    "Invalid SCSI completion handle %d.\n", index);

845
		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
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		return;
	}

849
	sp = req->outstanding_cmds[index];
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	if (sp) {
		/* Free outstanding command slot. */
852
		req->outstanding_cmds[index] = NULL;
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		/* Save ISP completion status */
		sp->cmd->result = DID_OK << 16;
856

857 858
		qla2x00_ramp_up_queue_depth(vha, req, sp);
		qla2x00_sp_compl(ha, sp);
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	} else {
860 861
		DEBUG2(printk("scsi(%ld) Req:%d: Invalid ISP SCSI completion"
			" handle(%d)\n", vha->host_no, req->id, index));
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		qla_printk(KERN_WARNING, ha,
		    "Invalid ISP SCSI completion handle\n");

865
		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
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	}
}

/**
 * qla2x00_process_response_queue() - Process response queue entries.
 * @ha: SCSI driver HA context
 */
void
874
qla2x00_process_response_queue(struct rsp_que *rsp)
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{
876 877
	struct scsi_qla_host *vha;
	struct qla_hw_data *ha = rsp->hw;
878
	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
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	sts_entry_t	*pkt;
	uint16_t        handle_cnt;
	uint16_t        cnt;
882

883
	vha = pci_get_drvdata(ha->pdev);
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885
	if (!vha->flags.online)
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		return;

888 889
	while (rsp->ring_ptr->signature != RESPONSE_PROCESSED) {
		pkt = (sts_entry_t *)rsp->ring_ptr;
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		rsp->ring_index++;
		if (rsp->ring_index == rsp->length) {
			rsp->ring_index = 0;
			rsp->ring_ptr = rsp->ring;
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		} else {
896
			rsp->ring_ptr++;
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		}

		if (pkt->entry_status != 0) {
			DEBUG3(printk(KERN_INFO
901
			    "scsi(%ld): Process error entry.\n", vha->host_no));
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903
			qla2x00_error_entry(vha, rsp, pkt);
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			((response_t *)pkt)->signature = RESPONSE_PROCESSED;
			wmb();
			continue;
		}

		switch (pkt->entry_type) {
		case STATUS_TYPE:
911
			qla2x00_status_entry(vha, rsp, pkt);
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			break;
		case STATUS_TYPE_21:
			handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
			for (cnt = 0; cnt < handle_cnt; cnt++) {
916
				qla2x00_process_completed_request(vha, rsp->req,
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				    ((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++) {
923
				qla2x00_process_completed_request(vha, rsp->req,
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				    ((sts22_entry_t *)pkt)->handle[cnt]);
			}
			break;
		case STATUS_CONT_TYPE:
928
			qla2x00_status_cont_entry(rsp, (sts_cont_entry_t *)pkt);
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			break;
		default:
			/* Type Not Supported. */
			DEBUG4(printk(KERN_WARNING
			    "scsi(%ld): Received unknown response pkt type %x "
			    "entry status=%x.\n",
935
			    vha->host_no, pkt->entry_type, pkt->entry_status));
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			break;
		}
		((response_t *)pkt)->signature = RESPONSE_PROCESSED;
		wmb();
	}

	/* Adjust ring index */
943
	WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), rsp->ring_index);
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}

946
static inline void
947 948
qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len,
	struct rsp_que *rsp)
949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964
{
	struct scsi_cmnd *cp = sp->cmd;

	if (sense_len >= SCSI_SENSE_BUFFERSIZE)
		sense_len = SCSI_SENSE_BUFFERSIZE;

	sp->request_sense_length = sense_len;
	sp->request_sense_ptr = cp->sense_buffer;
	if (sp->request_sense_length > 32)
		sense_len = 32;

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

	sp->request_sense_ptr += sense_len;
	sp->request_sense_length -= sense_len;
	if (sp->request_sense_length != 0)
965
		rsp->status_srb = sp;
966 967

	DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
968
	    "cmd=%p pid=%ld\n", __func__, sp->fcport->vha->host_no,
969 970
	    cp->device->channel, cp->device->id, cp->device->lun, cp,
	    cp->serial_number));
971
	if (sense_len)
972
		DEBUG5(qla2x00_dump_buffer(cp->sense_buffer, sense_len));
973 974
}

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/**
 * qla2x00_status_entry() - Process a Status IOCB entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 */
static void
981
qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt)
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{
	srb_t		*sp;
	fc_port_t	*fcport;
	struct scsi_cmnd *cp;
986 987
	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;
992
	uint32_t	sense_len, rsp_info_len, resid_len, fw_resid_len;
993
	uint8_t		*rsp_info, *sense_data;
994
	struct qla_hw_data *ha = vha->hw;
995 996 997
	uint32_t handle;
	uint16_t que;
	struct req_que *req;
998 999 1000

	sts = (sts_entry_t *) pkt;
	sts24 = (struct sts_entry_24xx *) pkt;
1001
	if (IS_FWI2_CAPABLE(ha)) {
1002 1003 1004 1005 1006 1007
		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;
	}
1008 1009 1010
	handle = (uint32_t) LSW(sts->handle);
	que = MSW(sts->handle);
	req = ha->req_q_map[que];
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	/* Fast path completion. */
1012
	if (comp_status == CS_COMPLETE && scsi_status == 0) {
1013
		qla2x00_process_completed_request(vha, req, handle);
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		return;
	}

	/* Validate handle. */
1019 1020 1021
	if (handle < MAX_OUTSTANDING_COMMANDS) {
		sp = req->outstanding_cmds[handle];
		req->outstanding_cmds[handle] = NULL;
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	} else
		sp = NULL;

	if (sp == NULL) {
		DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
1027
		    vha->host_no));
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		qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");

1030 1031
		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
		qla2xxx_wake_dpc(vha);
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		return;
	}
	cp = sp->cmd;
	if (cp == NULL) {
		DEBUG2(printk("scsi(%ld): Command already returned back to OS "
1037
		    "pkt->handle=%d sp=%p.\n", vha->host_no, handle, sp));
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		qla_printk(KERN_WARNING, ha,
		    "Command is NULL: already returned to OS (sp=%p)\n", sp);

		return;
	}

1044
  	lscsi_status = scsi_status & STATUS_MASK;
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1046
	fcport = sp->fcport;
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1047

1048
	sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
1049
	if (IS_FWI2_CAPABLE(ha)) {
1050 1051 1052
		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);
1053
		fw_resid_len = le32_to_cpu(sts24->residual_len);
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
		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) {
1067
		/* Sense data lies beyond any FCP RESPONSE data. */
1068
		if (IS_FWI2_CAPABLE(ha))
1069 1070
			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)..."
1073
			    "retrying command\n", vha->host_no,
1074 1075 1076 1077
			    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;
1080
			qla2x00_sp_compl(ha, sp);
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			return;
		}
	}

1085 1086 1087 1088 1089
	/* Check for overrun. */
	if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
	    scsi_status & SS_RESIDUAL_OVER)
		comp_status = CS_DATA_OVERRUN;

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	/*
	 * Based on Host and scsi status generate status code for Linux
	 */
	switch (comp_status) {
	case CS_COMPLETE:
1095
	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)) {
1101
			resid = resid_len;
1102
			scsi_set_resid(cp, resid);
1103 1104

			if (!lscsi_status &&
1105
			    ((unsigned)(scsi_bufflen(cp) - resid) <
1106 1107
			     cp->underflow)) {
				qla_printk(KERN_INFO, ha,
1108 1109
					   "scsi(%ld:%d:%d:%d): Mid-layer underflow "
					   "detected (%x of %x bytes)...returning "
1110
					   "error status.\n", vha->host_no,
1111 1112 1113
					   cp->device->channel, cp->device->id,
					   cp->device->lun, resid,
					   scsi_bufflen(cp));
1114 1115 1116 1117

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

1121 1122 1123
		if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
			DEBUG2(printk(KERN_INFO
			    "scsi(%ld): QUEUE FULL status detected "
1124
			    "0x%x-0x%x.\n", vha->host_no, comp_status,
1125 1126 1127 1128 1129 1130 1131 1132
			    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;

1136
		memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
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		if (!(scsi_status & SS_SENSE_LEN_VALID))
			break;

1140
		qla2x00_handle_sense(sp, sense_data, sense_len, rsp);
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		break;

	case CS_DATA_UNDERRUN:
1144
		resid = resid_len;
1145
		/* Use F/W calculated residual length. */
1146
		if (IS_FWI2_CAPABLE(ha)) {
1147 1148 1149
			if (!(scsi_status & SS_RESIDUAL_UNDER)) {
				lscsi_status = 0;
			} else if (resid != fw_resid_len) {
1150 1151 1152
				scsi_status &= ~SS_RESIDUAL_UNDER;
				lscsi_status = 0;
			}
1153
			resid = fw_resid_len;
1154
		}
1155

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		if (scsi_status & SS_RESIDUAL_UNDER) {
1157
			scsi_set_resid(cp, resid);
1158 1159 1160
		} else {
			DEBUG2(printk(KERN_INFO
			    "scsi(%ld:%d:%d) UNDERRUN status detected "
1161
			    "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1162
			    "os_underflow=0x%x\n", vha->host_no,
1163 1164 1165
			    cp->device->id, cp->device->lun, comp_status,
			    scsi_status, resid_len, resid, cp->cmnd[0],
			    cp->underflow));
1166

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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;

1176 1177 1178
			if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
				DEBUG2(printk(KERN_INFO
				    "scsi(%ld): QUEUE FULL status detected "
1179
				    "0x%x-0x%x.\n", vha->host_no, comp_status,
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191
				    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;

1195
			memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
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			if (!(scsi_status & SS_SENSE_LEN_VALID))
				break;

1199
			qla2x00_handle_sense(sp, sense_data, sense_len, rsp);
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		} 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 "
1208
					      "frame(s) detected (%x of %x bytes)..."
1209 1210 1211 1212
					      "retrying command.\n",
					vha->host_no, cp->device->channel,
					cp->device->id, cp->device->lun, resid,
					scsi_bufflen(cp)));
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				cp->result = DID_BUS_BUSY << 16;
				break;
			}

			/* Handle mid-layer underflow */
1219
			if ((unsigned)(scsi_bufflen(cp) - resid) <
L
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1220 1221
			    cp->underflow) {
				qla_printk(KERN_INFO, ha,
1222 1223
					   "scsi(%ld:%d:%d:%d): Mid-layer underflow "
					   "detected (%x of %x bytes)...returning "
1224
					   "error status.\n", vha->host_no,
1225 1226 1227
					   cp->device->channel, cp->device->id,
					   cp->device->lun, resid,
					   scsi_bufflen(cp));
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1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240

				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",
1241
		    vha->host_no, cp->device->id, cp->device->lun, comp_status,
1242
		    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",
1250
		    cp->serial_number, scsi_bufflen(cp), resid_len));
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1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266

		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",
1267
		    vha->host_no, cp->device->id, cp->device->lun,
1268
		    cp->serial_number, comp_status,
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		    atomic_read(&fcport->state)));

1271 1272 1273 1274 1275 1276
		/*
		 * We are going to have the fc class block the rport
		 * while we try to recover so instruct the mid layer
		 * to requeue until the class decides how to handle this.
		 */
		cp->result = DID_TRANSPORT_DISRUPTED << 16;
1277
		if (atomic_read(&fcport->state) == FCS_ONLINE)
1278
			qla2x00_mark_device_lost(fcport->vha, 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",
1284
		    vha->host_no, comp_status, scsi_status));
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已提交
1286
		cp->result = DID_RESET << 16;
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		break;

	case CS_ABORTED:
A
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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",
1297
		    vha->host_no, comp_status, scsi_status));
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		cp->result = DID_RESET << 16;
		break;

	case CS_TIMEOUT:
1303 1304 1305 1306 1307 1308
		/*
		 * We are going to have the fc class block the rport
		 * while we try to recover so instruct the mid layer
		 * to requeue until the class decides how to handle this.
		 */
		cp->result = DID_TRANSPORT_DISRUPTED << 16;
1309

1310
		if (IS_FWI2_CAPABLE(ha)) {
1311 1312
			DEBUG2(printk(KERN_INFO
			    "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1313
			    "0x%x-0x%x\n", vha->host_no, cp->device->channel,
1314 1315 1316 1317
			    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 "
1320
		    "sflags=%x.\n", vha->host_no, cp->device->channel,
1321 1322
		    cp->device->id, cp->device->lun, comp_status, scsi_status,
		    le16_to_cpu(sts->status_flags)));
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1324 1325
		/* Check to see if logout occurred. */
		if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1326
			qla2x00_mark_device_lost(fcport->vha, fcport, 1, 1);
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		break;

	default:
		DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1331
		    "0x%x-0x%x.\n", vha->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. */
1341
	if (rsp->status_srb == NULL)
1342
		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
1353
qla2x00_status_cont_entry(struct rsp_que *rsp, sts_cont_entry_t *pkt)
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{
	uint8_t		sense_sz = 0;
1356 1357
	struct qla_hw_data *ha = rsp->hw;
	srb_t		*sp = rsp->status_srb;
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	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 "
1364
			    "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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1369
			rsp->status_srb = NULL;
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			return;
		}

		if (sp->request_sense_length > sizeof(pkt->data)) {
			sense_sz = sizeof(pkt->data);
		} else {
			sense_sz = sp->request_sense_length;
		}

		/* Move sense data. */
1380
		if (IS_FWI2_CAPABLE(ha))
1381
			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) {
1390
			rsp->status_srb = NULL;
1391
			qla2x00_sp_compl(ha, sp);
L
Linus Torvalds 已提交
1392 1393 1394 1395 1396 1397 1398 1399 1400 1401
		}
	}
}

/**
 * qla2x00_error_entry() - Process an error entry.
 * @ha: SCSI driver HA context
 * @pkt: Entry pointer
 */
static void
1402
qla2x00_error_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, sts_entry_t *pkt)
L
Linus Torvalds 已提交
1403 1404
{
	srb_t *sp;
1405
	struct qla_hw_data *ha = vha->hw;
1406 1407 1408
	uint32_t handle = LSW(pkt->handle);
	uint16_t que = MSW(pkt->handle);
	struct req_que *req = ha->req_q_map[que];
L
Linus Torvalds 已提交
1409 1410 1411 1412 1413 1414
#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)
A
Andrew Vasquez 已提交
1415
		qla_printk(KERN_ERR, ha,
L
Linus Torvalds 已提交
1416 1417 1418 1419 1420 1421 1422 1423 1424 1425
		    "%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. */
1426 1427
	if (handle < MAX_OUTSTANDING_COMMANDS)
		sp = req->outstanding_cmds[handle];
L
Linus Torvalds 已提交
1428 1429 1430 1431 1432
	else
		sp = NULL;

	if (sp) {
		/* Free outstanding command slot. */
1433
		req->outstanding_cmds[handle] = NULL;
1434

L
Linus Torvalds 已提交
1435 1436 1437 1438 1439 1440 1441 1442 1443 1444
		/* 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;
		}
1445
		qla2x00_sp_compl(ha, sp);
L
Linus Torvalds 已提交
1446

1447 1448
	} else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
	    COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
L
Linus Torvalds 已提交
1449
		DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1450
		    vha->host_no));
L
Linus Torvalds 已提交
1451 1452 1453
		qla_printk(KERN_WARNING, ha,
		    "Error entry - invalid handle\n");

1454 1455
		set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
		qla2xxx_wake_dpc(vha);
L
Linus Torvalds 已提交
1456 1457 1458
	}
}

1459 1460 1461 1462 1463 1464
/**
 * qla24xx_mbx_completion() - Process mailbox command completions.
 * @ha: SCSI driver HA context
 * @mb0: Mailbox0 register
 */
static void
1465
qla24xx_mbx_completion(scsi_qla_host_t *vha, uint16_t mb0)
1466 1467 1468
{
	uint16_t	cnt;
	uint16_t __iomem *wptr;
1469
	struct qla_hw_data *ha = vha->hw;
1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483
	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",
1484
		    __func__, vha->host_no, ha->mcp->mb[0]));
1485 1486
	} else {
		DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1487
		    __func__, vha->host_no));
1488 1489 1490 1491 1492 1493 1494
	}
}

/**
 * qla24xx_process_response_queue() - Process response queue entries.
 * @ha: SCSI driver HA context
 */
1495 1496
void qla24xx_process_response_queue(struct scsi_qla_host *vha,
	struct rsp_que *rsp)
1497 1498 1499
{
	struct sts_entry_24xx *pkt;

1500
	if (!vha->flags.online)
1501 1502
		return;

1503 1504
	while (rsp->ring_ptr->signature != RESPONSE_PROCESSED) {
		pkt = (struct sts_entry_24xx *)rsp->ring_ptr;
1505

1506 1507 1508 1509
		rsp->ring_index++;
		if (rsp->ring_index == rsp->length) {
			rsp->ring_index = 0;
			rsp->ring_ptr = rsp->ring;
1510
		} else {
1511
			rsp->ring_ptr++;
1512 1513 1514 1515
		}

		if (pkt->entry_status != 0) {
			DEBUG3(printk(KERN_INFO
1516
			    "scsi(%ld): Process error entry.\n", vha->host_no));
1517

1518
			qla2x00_error_entry(vha, rsp, (sts_entry_t *) pkt);
1519 1520 1521 1522 1523 1524 1525
			((response_t *)pkt)->signature = RESPONSE_PROCESSED;
			wmb();
			continue;
		}

		switch (pkt->entry_type) {
		case STATUS_TYPE:
1526
			qla2x00_status_entry(vha, rsp, pkt);
1527 1528
			break;
		case STATUS_CONT_TYPE:
1529
			qla2x00_status_cont_entry(rsp, (sts_cont_entry_t *)pkt);
1530
			break;
1531
		case VP_RPT_ID_IOCB_TYPE:
1532
			qla24xx_report_id_acquisition(vha,
1533 1534
			    (struct vp_rpt_id_entry_24xx *)pkt);
			break;
1535 1536 1537 1538 1539
		default:
			/* Type Not Supported. */
			DEBUG4(printk(KERN_WARNING
			    "scsi(%ld): Received unknown response pkt type %x "
			    "entry status=%x.\n",
1540
			    vha->host_no, pkt->entry_type, pkt->entry_status));
1541 1542 1543 1544 1545 1546 1547
			break;
		}
		((response_t *)pkt)->signature = RESPONSE_PROCESSED;
		wmb();
	}

	/* Adjust ring index */
1548
	WRT_REG_DWORD(rsp->rsp_q_out, rsp->ring_index);
1549 1550
}

1551
static void
1552
qla2xxx_check_risc_status(scsi_qla_host_t *vha)
1553 1554 1555
{
	int rval;
	uint32_t cnt;
1556
	struct qla_hw_data *ha = vha->hw;
1557 1558
	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;

1559
	if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha))
1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597
		return;

	rval = QLA_SUCCESS;
	WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
	RD_REG_DWORD(&reg->iobase_addr);
	WRT_REG_DWORD(&reg->iobase_window, 0x0001);
	for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
	    rval == QLA_SUCCESS; cnt--) {
		if (cnt) {
			WRT_REG_DWORD(&reg->iobase_window, 0x0001);
			udelay(10);
		} else
			rval = QLA_FUNCTION_TIMEOUT;
	}
	if (rval == QLA_SUCCESS)
		goto next_test;

	WRT_REG_DWORD(&reg->iobase_window, 0x0003);
	for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
	    rval == QLA_SUCCESS; cnt--) {
		if (cnt) {
			WRT_REG_DWORD(&reg->iobase_window, 0x0003);
			udelay(10);
		} else
			rval = QLA_FUNCTION_TIMEOUT;
	}
	if (rval != QLA_SUCCESS)
		goto done;

next_test:
	if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
		qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");

done:
	WRT_REG_DWORD(&reg->iobase_window, 0x0000);
	RD_REG_DWORD(&reg->iobase_window);
}

1598 1599 1600 1601 1602 1603 1604 1605 1606 1607
/**
 * 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
1608
qla24xx_intr_handler(int irq, void *dev_id)
1609
{
1610 1611
	scsi_qla_host_t	*vha;
	struct qla_hw_data *ha;
1612 1613 1614 1615 1616 1617
	struct device_reg_24xx __iomem *reg;
	int		status;
	unsigned long	iter;
	uint32_t	stat;
	uint32_t	hccr;
	uint16_t	mb[4];
1618
	struct rsp_que *rsp;
1619

1620 1621
	rsp = (struct rsp_que *) dev_id;
	if (!rsp) {
1622
		printk(KERN_INFO
1623
		    "%s(): NULL response queue pointer\n", __func__);
1624 1625 1626
		return IRQ_NONE;
	}

1627
	ha = rsp->hw;
1628 1629 1630
	reg = &ha->iobase->isp24;
	status = 0;

1631
	spin_lock(&ha->hardware_lock);
1632
	vha = pci_get_drvdata(ha->pdev);
1633 1634 1635
	for (iter = 50; iter--; ) {
		stat = RD_REG_DWORD(&reg->host_status);
		if (stat & HSRX_RISC_PAUSED) {
1636 1637 1638
			if (pci_channel_offline(ha->pdev))
				break;

1639 1640 1641 1642
			hccr = RD_REG_DWORD(&reg->hccr);

			qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
			    "Dumping firmware!\n", hccr);
1643

1644
			qla2xxx_check_risc_status(vha);
1645

1646 1647
			ha->isp_ops->fw_dump(vha, 1);
			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1648 1649 1650 1651 1652 1653 1654 1655 1656
			break;
		} else if ((stat & HSRX_RISC_INT) == 0)
			break;

		switch (stat & 0xff) {
		case 0x1:
		case 0x2:
		case 0x10:
		case 0x11:
1657
			qla24xx_mbx_completion(vha, MSW(stat));
1658 1659 1660 1661 1662 1663 1664 1665
			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);
1666
			qla2x00_async_event(vha, rsp, mb);
1667 1668
			break;
		case 0x13:
1669
		case 0x14:
1670
			qla24xx_process_response_queue(vha, rsp);
1671 1672 1673 1674
			break;
		default:
			DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
			    "(%d).\n",
1675
			    vha->host_no, stat & 0xff));
1676 1677 1678 1679 1680
			break;
		}
		WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
		RD_REG_DWORD_RELAXED(&reg->hccr);
	}
1681
	spin_unlock(&ha->hardware_lock);
1682 1683 1684 1685

	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);
1686
		complete(&ha->mbx_intr_comp);
1687 1688 1689 1690 1691
	}

	return IRQ_HANDLED;
}

1692 1693 1694
static irqreturn_t
qla24xx_msix_rsp_q(int irq, void *dev_id)
{
1695 1696
	struct qla_hw_data *ha;
	struct rsp_que *rsp;
1697
	struct device_reg_24xx __iomem *reg;
1698
	struct scsi_qla_host *vha;
1699

1700 1701 1702 1703 1704 1705 1706
	rsp = (struct rsp_que *) dev_id;
	if (!rsp) {
		printk(KERN_INFO
		"%s(): NULL response queue pointer\n", __func__);
		return IRQ_NONE;
	}
	ha = rsp->hw;
1707 1708
	reg = &ha->iobase->isp24;

1709
	spin_lock_irq(&ha->hardware_lock);
1710

1711 1712
	vha = qla25xx_get_host(rsp);
	qla24xx_process_response_queue(vha, rsp);
1713 1714
	WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);

1715
	spin_unlock_irq(&ha->hardware_lock);
1716 1717 1718 1719 1720 1721 1722

	return IRQ_HANDLED;
}

static irqreturn_t
qla24xx_msix_default(int irq, void *dev_id)
{
1723 1724 1725
	scsi_qla_host_t	*vha;
	struct qla_hw_data *ha;
	struct rsp_que *rsp;
1726 1727 1728 1729 1730 1731
	struct device_reg_24xx __iomem *reg;
	int		status;
	uint32_t	stat;
	uint32_t	hccr;
	uint16_t	mb[4];

1732 1733 1734 1735 1736 1737 1738
	rsp = (struct rsp_que *) dev_id;
	if (!rsp) {
		DEBUG(printk(
		"%s(): NULL response queue pointer\n", __func__));
		return IRQ_NONE;
	}
	ha = rsp->hw;
1739 1740 1741
	reg = &ha->iobase->isp24;
	status = 0;

1742
	spin_lock_irq(&ha->hardware_lock);
1743
	vha = pci_get_drvdata(ha->pdev);
1744
	do {
1745 1746
		stat = RD_REG_DWORD(&reg->host_status);
		if (stat & HSRX_RISC_PAUSED) {
1747 1748 1749
			if (pci_channel_offline(ha->pdev))
				break;

1750 1751 1752 1753
			hccr = RD_REG_DWORD(&reg->hccr);

			qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
			    "Dumping firmware!\n", hccr);
1754

1755
			qla2xxx_check_risc_status(vha);
1756

1757 1758
			ha->isp_ops->fw_dump(vha, 1);
			set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1759 1760 1761 1762 1763 1764 1765 1766 1767
			break;
		} else if ((stat & HSRX_RISC_INT) == 0)
			break;

		switch (stat & 0xff) {
		case 0x1:
		case 0x2:
		case 0x10:
		case 0x11:
1768
			qla24xx_mbx_completion(vha, MSW(stat));
1769 1770 1771 1772 1773 1774 1775 1776
			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);
1777
			qla2x00_async_event(vha, rsp, mb);
1778 1779
			break;
		case 0x13:
1780
		case 0x14:
1781
			qla24xx_process_response_queue(vha, rsp);
1782 1783 1784 1785
			break;
		default:
			DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
			    "(%d).\n",
1786
			    vha->host_no, stat & 0xff));
1787 1788 1789
			break;
		}
		WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1790
	} while (0);
1791
	spin_unlock_irq(&ha->hardware_lock);
1792 1793 1794 1795

	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);
1796
		complete(&ha->mbx_intr_comp);
1797 1798 1799 1800 1801 1802 1803 1804 1805
	}

	return IRQ_HANDLED;
}

/* Interrupt handling helpers. */

struct qla_init_msix_entry {
	const char *name;
1806
	irq_handler_t handler;
1807 1808
};

1809 1810 1811
static struct qla_init_msix_entry msix_entries[2] = {
	{ "qla2xxx (default)", qla24xx_msix_default },
	{ "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1812 1813 1814
};

static void
1815
qla24xx_disable_msix(struct qla_hw_data *ha)
1816 1817 1818 1819
{
	int i;
	struct qla_msix_entry *qentry;

1820 1821
	for (i = 0; i < ha->msix_count; i++) {
		qentry = &ha->msix_entries[i];
1822
		if (qentry->have_irq)
1823
			free_irq(qentry->vector, qentry->rsp);
1824 1825
	}
	pci_disable_msix(ha->pdev);
1826 1827 1828
	kfree(ha->msix_entries);
	ha->msix_entries = NULL;
	ha->flags.msix_enabled = 0;
1829 1830 1831
}

static int
1832
qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
1833
{
1834
#define MIN_MSIX_COUNT	2
1835
	int i, ret;
1836
	struct msix_entry *entries;
1837
	struct qla_msix_entry *qentry;
1838 1839 1840 1841 1842

	entries = kzalloc(sizeof(struct msix_entry) * ha->msix_count,
					GFP_KERNEL);
	if (!entries)
		return -ENOMEM;
1843

1844 1845
	for (i = 0; i < ha->msix_count; i++)
		entries[i].entry = i;
1846

1847
	ret = pci_enable_msix(ha->pdev, entries, ha->msix_count);
1848
	if (ret) {
1849 1850 1851
		if (ret < MIN_MSIX_COUNT)
			goto msix_failed;

1852
		qla_printk(KERN_WARNING, ha,
1853 1854 1855 1856 1857
			"MSI-X: Failed to enable support -- %d/%d\n"
			" Retry with %d vectors\n", ha->msix_count, ret, ret);
		ha->msix_count = ret;
		ret = pci_enable_msix(ha->pdev, entries, ha->msix_count);
		if (ret) {
1858
msix_failed:
1859 1860 1861 1862 1863
			qla_printk(KERN_WARNING, ha, "MSI-X: Failed to enable"
				" support, giving up -- %d/%d\n",
				ha->msix_count, ret);
			goto msix_out;
		}
1864
		ha->max_rsp_queues = ha->msix_count - 1;
1865 1866 1867 1868 1869
	}
	ha->msix_entries = kzalloc(sizeof(struct qla_msix_entry) *
				ha->msix_count, GFP_KERNEL);
	if (!ha->msix_entries) {
		ret = -ENOMEM;
1870 1871 1872 1873
		goto msix_out;
	}
	ha->flags.msix_enabled = 1;

1874 1875 1876 1877
	for (i = 0; i < ha->msix_count; i++) {
		qentry = &ha->msix_entries[i];
		qentry->vector = entries[i].vector;
		qentry->entry = entries[i].entry;
1878
		qentry->have_irq = 0;
1879
		qentry->rsp = NULL;
1880 1881
	}

1882 1883 1884 1885 1886 1887 1888
	/* Enable MSI-X vectors for the base queue */
	for (i = 0; i < 2; i++) {
		qentry = &ha->msix_entries[i];
		ret = request_irq(qentry->vector, msix_entries[i].handler,
					0, msix_entries[i].name, rsp);
		if (ret) {
			qla_printk(KERN_WARNING, ha,
1889 1890
			"MSI-X: Unable to register handler -- %x/%d.\n",
			qentry->vector, ret);
1891 1892 1893 1894 1895 1896 1897
			qla24xx_disable_msix(ha);
			ha->mqenable = 0;
			goto msix_out;
		}
		qentry->have_irq = 1;
		qentry->rsp = rsp;
		rsp->msix = qentry;
1898 1899 1900
	}

	/* Enable MSI-X vector for response queue update for queue 0 */
1901
	if (ha->mqiobase &&  (ha->max_rsp_queues > 1 || ha->max_req_queues > 1))
1902 1903
		ha->mqenable = 1;

1904
msix_out:
1905
	kfree(entries);
1906 1907 1908 1909
	return ret;
}

int
1910
qla2x00_request_irqs(struct qla_hw_data *ha, struct rsp_que *rsp)
1911 1912
{
	int ret;
1913
	device_reg_t __iomem *reg = ha->iobase;
1914 1915

	/* If possible, enable MSI-X. */
1916 1917
	if (!IS_QLA2432(ha) && !IS_QLA2532(ha) &&
	    !IS_QLA8432(ha) && !IS_QLA8001(ha))
1918 1919
		goto skip_msix;

1920 1921
	if (IS_QLA2432(ha) && (ha->pdev->revision < QLA_MSIX_CHIP_REV_24XX ||
		!QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1922
		DEBUG2(qla_printk(KERN_WARNING, ha,
1923 1924
		"MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
			ha->pdev->revision, ha->fw_attributes));
1925 1926 1927 1928

		goto skip_msix;
	}

1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940
	if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
	    (ha->pdev->subsystem_device == 0x7040 ||
		ha->pdev->subsystem_device == 0x7041 ||
		ha->pdev->subsystem_device == 0x1705)) {
		DEBUG2(qla_printk(KERN_WARNING, ha,
		    "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
		    ha->pdev->subsystem_vendor,
		    ha->pdev->subsystem_device));

		goto skip_msi;
	}

1941
	ret = qla24xx_enable_msix(ha, rsp);
1942 1943 1944 1945
	if (!ret) {
		DEBUG2(qla_printk(KERN_INFO, ha,
		    "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
		    ha->fw_attributes));
1946
		goto clear_risc_ints;
1947 1948 1949 1950
	}
	qla_printk(KERN_WARNING, ha,
	    "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
skip_msix:
1951

1952 1953
	if (!IS_QLA24XX(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha) &&
	    !IS_QLA8001(ha))
1954 1955 1956 1957 1958 1959 1960 1961 1962
		goto skip_msi;

	ret = pci_enable_msi(ha->pdev);
	if (!ret) {
		DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
		ha->flags.msi_enabled = 1;
	}
skip_msi:

1963
	ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1964
	    IRQF_SHARED, QLA2XXX_DRIVER_NAME, rsp);
1965
	if (ret) {
1966 1967 1968
		qla_printk(KERN_WARNING, ha,
		    "Failed to reserve interrupt %d already in use.\n",
		    ha->pdev->irq);
1969 1970 1971 1972 1973
		goto fail;
	}
	ha->flags.inta_enabled = 1;
clear_risc_ints:

1974 1975 1976 1977 1978 1979
	/*
	 * FIXME: Noted that 8014s were being dropped during NK testing.
	 * Timing deltas during MSI-X/INTa transitions?
	 */
	if (IS_QLA81XX(ha))
		goto fail;
1980
	spin_lock_irq(&ha->hardware_lock);
1981 1982 1983 1984 1985 1986 1987
	if (IS_FWI2_CAPABLE(ha)) {
		WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
		WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
	} else {
		WRT_REG_WORD(&reg->isp.semaphore, 0);
		WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
		WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1988
	}
1989
	spin_unlock_irq(&ha->hardware_lock);
1990

1991
fail:
1992 1993 1994 1995
	return ret;
}

void
1996
qla2x00_free_irqs(scsi_qla_host_t *vha)
1997
{
1998
	struct qla_hw_data *ha = vha->hw;
1999
	struct rsp_que *rsp = ha->rsp_q_map[0];
2000 2001 2002

	if (ha->flags.msix_enabled)
		qla24xx_disable_msix(ha);
2003
	else if (ha->flags.inta_enabled) {
2004
		free_irq(ha->pdev->irq, rsp);
2005 2006
		pci_disable_msi(ha->pdev);
	}
2007
}
2008

2009 2010 2011 2012

int qla25xx_request_irq(struct rsp_que *rsp)
{
	struct qla_hw_data *ha = rsp->hw;
2013
	struct qla_init_msix_entry *intr = &msix_entries[2];
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027
	struct qla_msix_entry *msix = rsp->msix;
	int ret;

	ret = request_irq(msix->vector, intr->handler, 0, intr->name, rsp);
	if (ret) {
		qla_printk(KERN_WARNING, ha,
			"MSI-X: Unable to register handler -- %x/%d.\n",
			msix->vector, ret);
		return ret;
	}
	msix->have_irq = 1;
	msix->rsp = rsp;
	return ret;
}
2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054

struct scsi_qla_host *
qla25xx_get_host(struct rsp_que *rsp)
{
	srb_t *sp;
	struct qla_hw_data *ha = rsp->hw;
	struct scsi_qla_host *vha = NULL;
	struct sts_entry_24xx *pkt;
	struct req_que *req;
	uint16_t que;
	uint32_t handle;

	pkt = (struct sts_entry_24xx *) rsp->ring_ptr;
	que = MSW(pkt->handle);
	handle = (uint32_t) LSW(pkt->handle);
	req = ha->req_q_map[que];
	if (handle < MAX_OUTSTANDING_COMMANDS) {
		sp = req->outstanding_cmds[handle];
		if (sp)
			return  sp->fcport->vha;
		else
			goto base_que;
	}
base_que:
	vha = pci_get_drvdata(ha->pdev);
	return vha;
}