qla_isr.c

h内核

/*
 *                  QLOGIC LINUX SOFTWARE
 *
 * QLogic ISP2x00 device driver for Linux 2.6.x
 * Copyright (C) 2003-2004 QLogic Corporation
 * (www.qlogic.com)
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 */
#include "qla_def.h"

static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
static void qla2x00_async_event(scsi_qla_host_t *, uint32_t);
static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
void qla2x00_process_response_queue(struct scsi_qla_host *);
static void qla2x00_status_entry(scsi_qla_host_t *, sts_entry_t *);
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 *);

static int qla2x00_check_sense(struct scsi_cmnd *cp, os_lun_t *);

/**
 * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
 * @irq:
 * @dev_id: SCSI driver HA context
 * @regs:
 *
 * Called by system whenever the host adapter generates an interrupt.
 *
 * Returns handled flag.
 */
irqreturn_t
qla2100_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
{
	scsi_qla_host_t	*ha;
	device_reg_t __iomem *reg;
	int		status;
	unsigned long	flags;
	unsigned long	iter;
	uint32_t	mbx;

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

	reg = ha->iobase;
	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. */
			mbx = RD_MAILBOX_REG(ha, reg, 0);
			if (mbx > 0x3fff && mbx < 0x8000) {
				qla2x00_mbx_completion(ha, (uint16_t)mbx);
				status |= MBX_INTERRUPT;
			} else if (mbx > 0x7fff && mbx < 0xc000) {
				qla2x00_async_event(ha, mbx);
			} else {
				/*EMPTY*/
				DEBUG2(printk("scsi(%ld): Unrecognized "
				    "interrupt type (%d)\n",
				    ha->host_no, mbx));
			}
			/* 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);

	qla2x00_next(ha);
	ha->last_irq_cpu = _smp_processor_id();
	ha->total_isr_cnt++;

	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);
	}

	if (!list_empty(&ha->done_queue))
		qla2x00_done(ha);

	return (IRQ_HANDLED);
}

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

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

	reg = ha->iobase;
	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,
				    "RISC paused -- HCCR=%x\n", hccr);

			/*
			 * Issue a "HARD" reset in order for the RISC
			 * interrupt bit to be cleared.  Schedule a big
			 * hammmer to get out of the RISC PAUSED state.
			 */
			WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
			RD_REG_WORD(&reg->hccr);
			set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
			break;
		} else if ((stat & HSR_RISC_INT) == 0)
			break;

		mbx = MSW(stat);
		switch (stat & 0xff) {
		case 0x13:
			qla2x00_process_response_queue(ha);
			break;
		case 0x1:
		case 0x2:
		case 0x10:
		case 0x11:
			qla2x00_mbx_completion(ha, (uint16_t)mbx);
			status |= MBX_INTERRUPT;

			/* Release mailbox registers. */
			WRT_REG_WORD(&reg->semaphore, 0);
			break;
		case 0x12:
			qla2x00_async_event(ha, mbx);
			break;
		case 0x15:
			mbx = mbx << 16 | MBA_CMPLT_1_16BIT;
			qla2x00_async_event(ha, mbx);
			break;
		case 0x16:
			mbx = mbx << 16 | MBA_SCSI_COMPLETION;
			qla2x00_async_event(ha, mbx);
			break;
		default:
			DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
			    "(%d)\n",
			    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);

	qla2x00_next(ha);
	ha->last_irq_cpu = _smp_processor_id();
	ha->total_isr_cnt++;

	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);
	}

	if (!list_empty(&ha->done_queue))
		qla2x00_done(ha);

	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;
	device_reg_t __iomem *reg = ha->iobase;

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

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

	if (ha->mcp) {
		DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
		    __func__, 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
 * @mb0: Mailbox0 register
 */
static void
qla2x00_async_event(scsi_qla_host_t *ha, uint32_t mbx)
{
	static char	*link_speeds[5] = { "1", "2", "4", "?", "10" };
	char		*link_speed;
	uint16_t	mb[4];
	uint16_t	handle_cnt;
	uint16_t	cnt;
	uint32_t	handles[5];
	device_reg_t __iomem *reg = ha->iobase;
	uint32_t	rscn_entry, host_pid;
	uint8_t		rscn_queue_index;

	/* Setup to process RIO completion. */
	handle_cnt = 0;
	mb[0] = LSW(mbx);
	switch (mb[0]) {
	case MBA_SCSI_COMPLETION:
		if (IS_QLA2100(ha) || IS_QLA2200(ha))
			handles[0] = le32_to_cpu(
			    ((uint32_t)(RD_MAILBOX_REG(ha, reg, 2) << 16)) |
			    RD_MAILBOX_REG(ha, reg, 1));
		else
			handles[0] = le32_to_cpu(
			    ((uint32_t)(RD_MAILBOX_REG(ha, reg, 2) << 16)) |
			    MSW(mbx));
		handle_cnt = 1;
		break;
	case MBA_CMPLT_1_16BIT:
		if (IS_QLA2100(ha) || IS_QLA2200(ha))
			handles[0] = (uint32_t)RD_MAILBOX_REG(ha, reg, 1);
		else
			handles[0] = MSW(mbx);
		handle_cnt = 1;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_2_16BIT:
		handles[0] = (uint32_t)RD_MAILBOX_REG(ha, reg, 1);
		handles[1] = (uint32_t)RD_MAILBOX_REG(ha, reg, 2);
		handle_cnt = 2;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_3_16BIT:
		handles[0] = (uint32_t)RD_MAILBOX_REG(ha, reg, 1);
		handles[1] = (uint32_t)RD_MAILBOX_REG(ha, reg, 2);
		handles[2] = (uint32_t)RD_MAILBOX_REG(ha, reg, 3);
		handle_cnt = 3;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_4_16BIT:
		handles[0] = (uint32_t)RD_MAILBOX_REG(ha, reg, 1);
		handles[1] = (uint32_t)RD_MAILBOX_REG(ha, reg, 2);
		handles[2] = (uint32_t)RD_MAILBOX_REG(ha, reg, 3);
		handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
		handle_cnt = 4;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_5_16BIT:
		handles[0] = (uint32_t)RD_MAILBOX_REG(ha, reg, 1);
		handles[1] = (uint32_t)RD_MAILBOX_REG(ha, reg, 2);
		handles[2] = (uint32_t)RD_MAILBOX_REG(ha, reg, 3);
		handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
		handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
		handle_cnt = 5;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	case MBA_CMPLT_2_32BIT:
		handles[0] = le32_to_cpu(
		    ((uint32_t)(RD_MAILBOX_REG(ha, reg, 2) << 16)) |
		    RD_MAILBOX_REG(ha, reg, 1));
		handles[1] = le32_to_cpu(
		    ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
		    RD_MAILBOX_REG(ha, reg, 6));
		handle_cnt = 2;
		mb[0] = MBA_SCSI_COMPLETION;
		break;
	default:
		break;
	}

	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]);

		if (IS_QLA2100(ha) || IS_QLA2200(ha))
			qla2100_fw_dump(ha, 1);
		else
	    		qla2300_fw_dump(ha, 1);

		if (mb[1] == 0) {
			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 */
		mb[1] = RD_MAILBOX_REG(ha, reg, 1);

		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);
			qla2x00_mark_all_devices_lost(ha);
		}

		set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);

		ha->flags.management_server_logged_in = 0;

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

		ha->total_lip_cnt++;
		break;

	case MBA_LOOP_UP:		/* Loop Up Event */
		mb[1] = RD_MAILBOX_REG(ha, reg, 1);

		ha->link_data_rate = 0;
		if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
			link_speed = link_speeds[0];
		} else {
			link_speed = link_speeds[3];
			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;

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

	case MBA_LOOP_DOWN:		/* Loop Down Event */
		DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN.\n",
		    ha->host_no));
		qla_printk(KERN_INFO, ha, "LOOP DOWN detected.\n");

		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;
			qla2x00_mark_all_devices_lost(ha);
		}

		ha->flags.management_server_logged_in = 0;
		ha->link_data_rate = 0;

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

	case MBA_LIP_RESET:		/* LIP reset occurred */
		mb[1] = RD_MAILBOX_REG(ha, reg, 1);

		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);
			qla2x00_mark_all_devices_lost(ha);
		}