qla1280.c

linux 内核源代码

	if (qla1280_check_for_dead_scsi_bus(ha, bus))
		return 1;

	if (device->tagged_supported &&
	    (ha->bus_settings[bus].qtag_enables & (BIT_0 << target))) {
		scsi_adjust_queue_depth(device, MSG_ORDERED_TAG,
					ha->bus_settings[bus].hiwat);
	} else {
		scsi_adjust_queue_depth(device, 0, default_depth);
	}

	nv->bus[bus].target[target].parameter.enable_sync = device->sdtr;
	nv->bus[bus].target[target].parameter.enable_wide = device->wdtr;
	nv->bus[bus].target[target].ppr_1x160.flags.enable_ppr = device->ppr;

	if (driver_setup.no_sync ||
	    (driver_setup.sync_mask &&
	     (~driver_setup.sync_mask & (1 << target))))
		nv->bus[bus].target[target].parameter.enable_sync = 0;
	if (driver_setup.no_wide ||
	    (driver_setup.wide_mask &&
	     (~driver_setup.wide_mask & (1 << target))))
		nv->bus[bus].target[target].parameter.enable_wide = 0;
	if (IS_ISP1x160(ha)) {
		if (driver_setup.no_ppr ||
		    (driver_setup.ppr_mask &&
		     (~driver_setup.ppr_mask & (1 << target))))
			nv->bus[bus].target[target].ppr_1x160.flags.enable_ppr = 0;
	}

	spin_lock_irqsave(ha->host->host_lock, flags);
	if (nv->bus[bus].target[target].parameter.enable_sync)
		status = qla1280_set_target_parameters(ha, bus, target);
	qla1280_get_target_parameters(ha, device);
	spin_unlock_irqrestore(ha->host->host_lock, flags);
	return status;
}


/*
 * qla1280_done
 *      Process completed commands.
 *
 * Input:
 *      ha           = adapter block pointer.
 */
static void
qla1280_done(struct scsi_qla_host *ha)
{
	struct srb *sp;
	struct list_head *done_q;
	int bus, target, lun;
	struct scsi_cmnd *cmd;

	ENTER("qla1280_done");

	done_q = &ha->done_q;

	while (!list_empty(done_q)) {
		sp = list_entry(done_q->next, struct srb, list);

		list_del(&sp->list);
	
		cmd = sp->cmd;
		bus = SCSI_BUS_32(cmd);
		target = SCSI_TCN_32(cmd);
		lun = SCSI_LUN_32(cmd);

		switch ((CMD_RESULT(cmd) >> 16)) {
		case DID_RESET:
			/* Issue marker command. */
			qla1280_marker(ha, bus, target, 0, MK_SYNC_ID);
			break;
		case DID_ABORT:
			sp->flags &= ~SRB_ABORT_PENDING;
			sp->flags |= SRB_ABORTED;
			if (sp->flags & SRB_TIMEOUT)
				CMD_RESULT(sp->cmd) = DID_TIME_OUT << 16;
			break;
		default:
			break;
		}

		/* Release memory used for this I/O */
		scsi_dma_unmap(cmd);

		/* Call the mid-level driver interrupt handler */
		CMD_HANDLE(sp->cmd) = (unsigned char *)INVALID_HANDLE;
		ha->actthreads--;

		(*(cmd)->scsi_done)(cmd);

		if(sp->wait != NULL)
			complete(sp->wait);
	}
	LEAVE("qla1280_done");
}

/*
 * Translates a ISP error to a Linux SCSI error
 */
static int
qla1280_return_status(struct response * sts, struct scsi_cmnd *cp)
{
	int host_status = DID_ERROR;
	uint16_t comp_status = le16_to_cpu(sts->comp_status);
	uint16_t state_flags = le16_to_cpu(sts->state_flags);
	uint32_t residual_length = le32_to_cpu(sts->residual_length);
	uint16_t scsi_status = le16_to_cpu(sts->scsi_status);
#if DEBUG_QLA1280_INTR
	static char *reason[] = {
		"DID_OK",
		"DID_NO_CONNECT",
		"DID_BUS_BUSY",
		"DID_TIME_OUT",
		"DID_BAD_TARGET",
		"DID_ABORT",
		"DID_PARITY",
		"DID_ERROR",
		"DID_RESET",
		"DID_BAD_INTR"
	};
#endif				/* DEBUG_QLA1280_INTR */

	ENTER("qla1280_return_status");

#if DEBUG_QLA1280_INTR
	/*
	  dprintk(1, "qla1280_return_status: compl status = 0x%04x\n",
	  comp_status);
	*/
#endif

	switch (comp_status) {
	case CS_COMPLETE:
		host_status = DID_OK;
		break;

	case CS_INCOMPLETE:
		if (!(state_flags & SF_GOT_BUS))
			host_status = DID_NO_CONNECT;
		else if (!(state_flags & SF_GOT_TARGET))
			host_status = DID_BAD_TARGET;
		else if (!(state_flags & SF_SENT_CDB))
			host_status = DID_ERROR;
		else if (!(state_flags & SF_TRANSFERRED_DATA))
			host_status = DID_ERROR;
		else if (!(state_flags & SF_GOT_STATUS))
			host_status = DID_ERROR;
		else if (!(state_flags & SF_GOT_SENSE))
			host_status = DID_ERROR;
		break;

	case CS_RESET:
		host_status = DID_RESET;
		break;

	case CS_ABORTED:
		host_status = DID_ABORT;
		break;

	case CS_TIMEOUT:
		host_status = DID_TIME_OUT;
		break;

	case CS_DATA_OVERRUN:
		dprintk(2, "Data overrun 0x%x\n", residual_length);
		dprintk(2, "qla1280_return_status: response packet data\n");
		qla1280_dump_buffer(2, (char *)sts, RESPONSE_ENTRY_SIZE);
		host_status = DID_ERROR;
		break;

	case CS_DATA_UNDERRUN:
		if ((scsi_bufflen(cp) - residual_length) <
		    cp->underflow) {
			printk(KERN_WARNING
			       "scsi: Underflow detected - retrying "
			       "command.\n");
			host_status = DID_ERROR;
		} else {
			scsi_set_resid(cp, residual_length);
			host_status = DID_OK;
		}
		break;

	default:
		host_status = DID_ERROR;
		break;
	}

#if DEBUG_QLA1280_INTR
	dprintk(1, "qla1280 ISP status: host status (%s) scsi status %x\n",
		reason[host_status], scsi_status);
#endif

	LEAVE("qla1280_return_status");

	return (scsi_status & 0xff) | (host_status << 16);
}

/****************************************************************************/
/*                QLogic ISP1280 Hardware Support Functions.                */
/****************************************************************************/

/*
 * qla1280_initialize_adapter
 *      Initialize board.
 *
 * Input:
 *      ha = adapter block pointer.
 *
 * Returns:
 *      0 = success
 */
static int __devinit
qla1280_initialize_adapter(struct scsi_qla_host *ha)
{
	struct device_reg __iomem *reg;
	int status;
	int bus;
	unsigned long flags;

	ENTER("qla1280_initialize_adapter");

	/* Clear adapter flags. */
	ha->flags.online = 0;
	ha->flags.disable_host_adapter = 0;
	ha->flags.reset_active = 0;
	ha->flags.abort_isp_active = 0;

#if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2)
	if (ia64_platform_is("sn2")) {
		printk(KERN_INFO "scsi(%li): Enabling SN2 PCI DMA "
		       "dual channel lockup workaround\n", ha->host_no);
		ha->flags.use_pci_vchannel = 1;
		driver_setup.no_nvram = 1;
	}
#endif

	/* TODO: implement support for the 1040 nvram format */
	if (IS_ISP1040(ha))
		driver_setup.no_nvram = 1;

	dprintk(1, "Configure PCI space for adapter...\n");

	reg = ha->iobase;

	/* Insure mailbox registers are free. */
	WRT_REG_WORD(&reg->semaphore, 0);
	WRT_REG_WORD(&reg->host_cmd, HC_CLR_RISC_INT);
	WRT_REG_WORD(&reg->host_cmd, HC_CLR_HOST_INT);
	RD_REG_WORD(&reg->host_cmd);

	if (qla1280_read_nvram(ha)) {
		dprintk(2, "qla1280_initialize_adapter: failed to read "
			"NVRAM\n");
	}

	/*
	 * It's necessary to grab the spin here as qla1280_mailbox_command
	 * needs to be able to drop the lock unconditionally to wait
	 * for completion.
	 */
	spin_lock_irqsave(ha->host->host_lock, flags);

	status = qla1280_load_firmware(ha);
	if (status) {
		printk(KERN_ERR "scsi(%li): initialize: pci probe failed!\n",
		       ha->host_no);
		goto out;
	}

	/* Setup adapter based on NVRAM parameters. */
	dprintk(1, "scsi(%ld): Configure NVRAM parameters\n", ha->host_no);
	qla1280_nvram_config(ha);

	if (ha->flags.disable_host_adapter) {
		status = 1;
		goto out;
	}

	status = qla1280_init_rings(ha);
	if (status)
		goto out;

	/* Issue SCSI reset, if we can't reset twice then bus is dead */
	for (bus = 0; bus < ha->ports; bus++) {
		if (!ha->bus_settings[bus].disable_scsi_reset &&
		    qla1280_bus_reset(ha, bus) &&
		    qla1280_bus_reset(ha, bus))
			ha->bus_settings[bus].scsi_bus_dead = 1;
	}

	ha->flags.online = 1;
 out:
	spin_unlock_irqrestore(ha->host->host_lock, flags);

	if (status)
		dprintk(2, "qla1280_initialize_adapter: **** FAILED ****\n");

	LEAVE("qla1280_initialize_adapter");
	return status;
}

/*
 * Chip diagnostics
 *      Test chip for proper operation.
 *
 * Input:
 *      ha = adapter block pointer.
 *
 * Returns:
 *      0 = success.
 */
static int
qla1280_chip_diag(struct scsi_qla_host *ha)
{
	uint16_t mb[MAILBOX_REGISTER_COUNT];
	struct device_reg __iomem *reg = ha->iobase;
	int status = 0;
	int cnt;
	uint16_t data;
	dprintk(3, "qla1280_chip_diag: testing device at 0x%p \n", &reg->id_l);

	dprintk(1, "scsi(%ld): Verifying chip\n", ha->host_no);

	/* Soft reset chip and wait for it to finish. */
	WRT_REG_WORD(&reg->ictrl, ISP_RESET);

	/*
	 * We can't do a traditional PCI write flush here by reading
	 * back the register. The card will not respond once the reset
	 * is in action and we end up with a machine check exception
	 * instead. Nothing to do but wait and hope for the best.
	 * A portable pci_write_flush(pdev) call would be very useful here.
	 */
	udelay(20);
	data = qla1280_debounce_register(&reg->ictrl);
	/*
	 * Yet another QLogic gem ;-(
	 */
	for (cnt = 1000000; cnt && data & ISP_RESET; cnt--) {
		udelay(5);
		data = RD_REG_WORD(&reg->ictrl);
	}

	if (!cnt)
		goto fail;

	/* Reset register cleared by chip reset. */
	dprintk(3, "qla1280_chip_diag: reset register cleared by chip reset\n");

	WRT_REG_WORD(&reg->cfg_1, 0);

	/* Reset RISC and disable BIOS which
	   allows RISC to execute out of RAM. */
	WRT_REG_WORD(&reg->host_cmd, HC_RESET_RISC |
		     HC_RELEASE_RISC | HC_DISABLE_BIOS);

	RD_REG_WORD(&reg->id_l);	/* Flush PCI write */
	data = qla1280_debounce_register(&reg->mailbox0);

	/*
	 * I *LOVE* this code!
	 */
	for (cnt = 1000000; cnt && data == MBS_BUSY; cnt--) {
		udelay(5);
		data = RD_REG_WORD(&reg->mailbox0);
	}

	if (!cnt)
		goto fail;

	/* Check product ID of chip */
	dprintk(3, "qla1280_chip_diag: Checking product ID of chip\n");

	if (RD_REG_WORD(&reg->mailbox1) != PROD_ID_1 ||
	    (RD_REG_WORD(&reg->mailbox2) != PROD_ID_2 &&
	     RD_REG_WORD(&reg->mailbox2) != PROD_ID_2a) ||
	    RD_REG_WORD(&reg->mailbox3) != PROD_ID_3 ||
	    RD_REG_WORD(&reg->mailbox4) != PROD_ID_4) {
		printk(KERN_INFO "qla1280: Wrong product ID = "
		       "0x%x,0x%x,0x%x,0x%x\n",
		       RD_REG_WORD(&reg->mailbox1),
		       RD_REG_WORD(&reg->mailbox2),
		       RD_REG_WORD(&reg->mailbox3),
		       RD_REG_WORD(&reg->mailbox4));
		goto fail;
	}

	/*
	 * Enable ints early!!!
	 */
	qla1280_enable_intrs(ha);

	dprintk(1, "qla1280_chip_diag: Checking mailboxes of chip\n");
	/* Wrap Incoming Mailboxes Test. */
	mb[0] = MBC_MAILBOX_REGISTER_TEST;
	mb[1] = 0xAAAA;
	mb[2] = 0x5555;
	mb[3] = 0xAA55;
	mb[4] = 0x55AA;
	mb[5] = 0xA5A5;
	mb[6] = 0x5A5A;
	mb[7] = 0x2525;

	status = qla1280_mailbox_command(ha, 0xff, mb);
	if (status)