qla1280.c

linux 内核源代码

	dprintk(4, "error_action %i, istatus 0x%04x\n", action,
		RD_REG_WORD(&ha->iobase->istatus));

	dprintk(4, "host_cmd 0x%04x, ictrl 0x%04x, jiffies %li\n",
		RD_REG_WORD(&ha->iobase->host_cmd),
		RD_REG_WORD(&ha->iobase->ictrl), jiffies);

	ENTER("qla1280_error_action");
	if (qla1280_verbose)
		printk(KERN_INFO "scsi(%li): Resetting Cmnd=0x%p, "
		       "Handle=0x%p, action=0x%x\n",
		       ha->host_no, cmd, CMD_HANDLE(cmd), action);

	if (cmd == NULL) {
		printk(KERN_WARNING "(scsi?:?:?:?) Reset called with NULL "
		       "si_Cmnd pointer, failing.\n");
		LEAVE("qla1280_error_action");
		return FAILED;
	}

	ha = (struct scsi_qla_host *)cmd->device->host->hostdata;
	sp = (struct srb *)CMD_SP(cmd);
	handle = CMD_HANDLE(cmd);

	/* Check for pending interrupts. */
	data = qla1280_debounce_register(&ha->iobase->istatus);
	/*
	 * The io_request_lock is held when the reset handler is called, hence
	 * the interrupt handler cannot be running in parallel as it also
	 * grabs the lock. /Jes
	 */
	if (data & RISC_INT)
		qla1280_isr(ha, &ha->done_q);

	/*
	 * Determine the suggested action that the mid-level driver wants
	 * us to perform.
	 */
	if (handle == (unsigned char *)INVALID_HANDLE || handle == NULL) {
		if(action == ABORT_COMMAND) {
			/* we never got this command */
			printk(KERN_INFO "qla1280: Aborting a NULL handle\n");
			return SUCCESS;	/* no action - we don't have command */
		}
	} else {
		sp->wait = &wait;
	}

	bus = SCSI_BUS_32(cmd);
	target = SCSI_TCN_32(cmd);
	lun = SCSI_LUN_32(cmd);

	/* Overloading result.  Here it means the success or fail of the
	 * *issue* of the action.  When we return from the routine, it must
	 * mean the actual success or fail of the action */
	result = FAILED;
	switch (action) {
	case FAIL:
		break;

	case ABORT_COMMAND:
		if ((sp->flags & SRB_ABORT_PENDING)) {
			printk(KERN_WARNING
			       "scsi(): Command has a pending abort "
			       "message - ABORT_PENDING.\n");
			/* This should technically be impossible since we
			 * now wait for abort completion */
			break;
		}

		for (i = 0; i < MAX_OUTSTANDING_COMMANDS; i++) {
			if (sp == ha->outstanding_cmds[i]) {
				dprintk(1, "qla1280: RISC aborting command\n");
				if (qla1280_abort_command(ha, sp, i) == 0)
					result = SUCCESS;
				else {
					/*
					 * Since we don't know what might
					 * have happend to the command, it
					 * is unsafe to remove it from the
					 * device's queue at this point.
					 * Wait and let the escalation
					 * process take care of it.
					 */
					printk(KERN_WARNING
					       "scsi(%li:%i:%i:%i): Unable"
					       " to abort command!\n",
					       ha->host_no, bus, target, lun);
				}
			}
		}
		break;

	case ABORT_DEVICE:
		if (qla1280_verbose)
			printk(KERN_INFO
			       "scsi(%ld:%d:%d:%d): Queueing abort device "
			       "command.\n", ha->host_no, bus, target, lun);
		if (qla1280_abort_device(ha, bus, target, lun) == 0)
			result = SUCCESS;
		break;

	case DEVICE_RESET:
		if (qla1280_verbose)
			printk(KERN_INFO
			       "scsi(%ld:%d:%d:%d): Queueing device reset "
			       "command.\n", ha->host_no, bus, target, lun);
		if (qla1280_device_reset(ha, bus, target) == 0)
			result = SUCCESS;
		break;

	case BUS_RESET:
		if (qla1280_verbose)
			printk(KERN_INFO "qla1280(%ld:%d): Issued bus "
			       "reset.\n", ha->host_no, bus);
		if (qla1280_bus_reset(ha, bus) == 0)
			result = SUCCESS;
		break;

	case ADAPTER_RESET:
	default:
		if (qla1280_verbose) {
			printk(KERN_INFO
			       "scsi(%ld): Issued ADAPTER RESET\n",
			       ha->host_no);
			printk(KERN_INFO "scsi(%ld): I/O processing will "
			       "continue automatically\n", ha->host_no);
		}
		ha->flags.reset_active = 1;
		/*
		 * We restarted all of the commands automatically, so the
		 * mid-level code can expect completions momentitarily.
		 */
		if (qla1280_abort_isp(ha) == 0)
			result = SUCCESS;

		ha->flags.reset_active = 0;
	}

	if (!list_empty(&ha->done_q))
		qla1280_done(ha);

	/* If we didn't manage to issue the action, or we have no
	 * command to wait for, exit here */
	if (result == FAILED || handle == NULL ||
	    handle == (unsigned char *)INVALID_HANDLE) {
		/*
		 * Clear completion queue to avoid qla1280_done() trying
		 * to complete the command at a later stage after we
		 * have exited the current context
		 */
		sp->wait = NULL;
		goto leave;
	}

	/* set up a timer just in case we're really jammed */
	init_timer(&timer);
	timer.expires = jiffies + 4*HZ;
	timer.data = (unsigned long)cmd;
	timer.function = qla1280_error_wait_timeout;
	add_timer(&timer);

	/* wait for the action to complete (or the timer to expire) */
	spin_unlock_irq(ha->host->host_lock);
	wait_for_completion(&wait);
	del_timer_sync(&timer);
	spin_lock_irq(ha->host->host_lock);
	sp->wait = NULL;

	/* the only action we might get a fail for is abort */
	if (action == ABORT_COMMAND) {
		if(sp->flags & SRB_ABORTED)
			result = SUCCESS;
		else
			result = FAILED;
	}

 leave:
	dprintk(1, "RESET returning %d\n", result);

	LEAVE("qla1280_error_action");
	return result;
}

/**************************************************************************
 *   qla1280_abort
 *     Abort the specified SCSI command(s).
 **************************************************************************/
static int
qla1280_eh_abort(struct scsi_cmnd * cmd)
{
	int rc;

	spin_lock_irq(cmd->device->host->host_lock);
	rc = qla1280_error_action(cmd, ABORT_COMMAND);
	spin_unlock_irq(cmd->device->host->host_lock);

	return rc;
}

/**************************************************************************
 *   qla1280_device_reset
 *     Reset the specified SCSI device
 **************************************************************************/
static int
qla1280_eh_device_reset(struct scsi_cmnd *cmd)
{
	int rc;

	spin_lock_irq(cmd->device->host->host_lock);
	rc = qla1280_error_action(cmd, DEVICE_RESET);
	spin_unlock_irq(cmd->device->host->host_lock);

	return rc;
}

/**************************************************************************
 *   qla1280_bus_reset
 *     Reset the specified bus.
 **************************************************************************/
static int
qla1280_eh_bus_reset(struct scsi_cmnd *cmd)
{
	int rc;

	spin_lock_irq(cmd->device->host->host_lock);
	rc = qla1280_error_action(cmd, BUS_RESET);
	spin_unlock_irq(cmd->device->host->host_lock);

	return rc;
}

/**************************************************************************
 *   qla1280_adapter_reset
 *     Reset the specified adapter (both channels)
 **************************************************************************/
static int
qla1280_eh_adapter_reset(struct scsi_cmnd *cmd)
{
	int rc;

	spin_lock_irq(cmd->device->host->host_lock);
	rc = qla1280_error_action(cmd, ADAPTER_RESET);
	spin_unlock_irq(cmd->device->host->host_lock);

	return rc;
}

static int
qla1280_biosparam(struct scsi_device *sdev, struct block_device *bdev,
		  sector_t capacity, int geom[])
{
	int heads, sectors, cylinders;

	heads = 64;
	sectors = 32;
	cylinders = (unsigned long)capacity / (heads * sectors);
	if (cylinders > 1024) {
		heads = 255;
		sectors = 63;
		cylinders = (unsigned long)capacity / (heads * sectors);
		/* if (cylinders > 1023)
		   cylinders = 1023; */
	}

	geom[0] = heads;
	geom[1] = sectors;
	geom[2] = cylinders;

	return 0;
}

 
/* disable risc and host interrupts */
static inline void
qla1280_disable_intrs(struct scsi_qla_host *ha)
{
	WRT_REG_WORD(&ha->iobase->ictrl, 0);
	RD_REG_WORD(&ha->iobase->ictrl);	/* PCI Posted Write flush */
}

/* enable risc and host interrupts */
static inline void
qla1280_enable_intrs(struct scsi_qla_host *ha)
{
	WRT_REG_WORD(&ha->iobase->ictrl, (ISP_EN_INT | ISP_EN_RISC));
	RD_REG_WORD(&ha->iobase->ictrl);	/* PCI Posted Write flush */
}

/**************************************************************************
 * qla1280_intr_handler
 *   Handles the H/W interrupt
 **************************************************************************/
static irqreturn_t
qla1280_intr_handler(int irq, void *dev_id)
{
	struct scsi_qla_host *ha;
	struct device_reg __iomem *reg;
	u16 data;
	int handled = 0;

	ENTER_INTR ("qla1280_intr_handler");
	ha = (struct scsi_qla_host *)dev_id;

	spin_lock(ha->host->host_lock);

	ha->isr_count++;
	reg = ha->iobase;

	qla1280_disable_intrs(ha);

	data = qla1280_debounce_register(&reg->istatus);
	/* Check for pending interrupts. */
	if (data & RISC_INT) {	
		qla1280_isr(ha, &ha->done_q);
		handled = 1;
	}
	if (!list_empty(&ha->done_q))
		qla1280_done(ha);

	spin_unlock(ha->host->host_lock);

	qla1280_enable_intrs(ha);

	LEAVE_INTR("qla1280_intr_handler");
	return IRQ_RETVAL(handled);
}


static int
qla1280_set_target_parameters(struct scsi_qla_host *ha, int bus, int target)
{
	uint8_t mr;
	uint16_t mb[MAILBOX_REGISTER_COUNT];
	struct nvram *nv;
	int status, lun;

	nv = &ha->nvram;

	mr = BIT_3 | BIT_2 | BIT_1 | BIT_0;

	/* Set Target Parameters. */
	mb[0] = MBC_SET_TARGET_PARAMETERS;
	mb[1] = (uint16_t)((bus ? target | BIT_7 : target) << 8);
	mb[2] = nv->bus[bus].target[target].parameter.renegotiate_on_error << 8;
	mb[2] |= nv->bus[bus].target[target].parameter.stop_queue_on_check << 9;
	mb[2] |= nv->bus[bus].target[target].parameter.auto_request_sense << 10;
	mb[2] |= nv->bus[bus].target[target].parameter.tag_queuing << 11;
	mb[2] |= nv->bus[bus].target[target].parameter.enable_sync << 12;
	mb[2] |= nv->bus[bus].target[target].parameter.enable_wide << 13;
	mb[2] |= nv->bus[bus].target[target].parameter.parity_checking << 14;
	mb[2] |= nv->bus[bus].target[target].parameter.disconnect_allowed << 15;

	if (IS_ISP1x160(ha)) {
		mb[2] |= nv->bus[bus].target[target].ppr_1x160.flags.enable_ppr << 5;
		mb[3] =	(nv->bus[bus].target[target].flags.flags1x160.sync_offset << 8);
		mb[6] =	(nv->bus[bus].target[target].ppr_1x160.flags.ppr_options << 8) |
			 nv->bus[bus].target[target].ppr_1x160.flags.ppr_bus_width;
		mr |= BIT_6;
	} else {
		mb[3] =	(nv->bus[bus].target[target].flags.flags1x80.sync_offset << 8);
	}
	mb[3] |= nv->bus[bus].target[target].sync_period;

	status = qla1280_mailbox_command(ha, mr, mb);

	/* Set Device Queue Parameters. */
	for (lun = 0; lun < MAX_LUNS; lun++) {
		mb[0] = MBC_SET_DEVICE_QUEUE;
		mb[1] = (uint16_t)((bus ? target | BIT_7 : target) << 8);
		mb[1] |= lun;
		mb[2] = nv->bus[bus].max_queue_depth;
		mb[3] = nv->bus[bus].target[target].execution_throttle;
		status |= qla1280_mailbox_command(ha, 0x0f, mb);
	}

	if (status)
		printk(KERN_WARNING "scsi(%ld:%i:%i): "
		       "qla1280_set_target_parameters() failed\n",
		       ha->host_no, bus, target);
	return status;
}


/**************************************************************************
 *   qla1280_slave_configure
 *
 * Description:
 *   Determines the queue depth for a given device.  There are two ways
 *   a queue depth can be obtained for a tagged queueing device.  One
 *   way is the default queue depth which is determined by whether
 *   If it is defined, then it is used
 *   as the default queue depth.  Otherwise, we use either 4 or 8 as the
 *   default queue depth (dependent on the number of hardware SCBs).
 **************************************************************************/
static int
qla1280_slave_configure(struct scsi_device *device)
{
	struct scsi_qla_host *ha;
	int default_depth = 3;
	int bus = device->channel;
	int target = device->id;
	int status = 0;
	struct nvram *nv;
	unsigned long flags;

	ha = (struct scsi_qla_host *)device->host->hostdata;
	nv = &ha->nvram;