tape_3590.c

来自「LINUX 2.6.17.4的源码」· C语言 代码 · 共 1,302 行 · 第 1/3 页

		     struct irb *irb, int rc)
{
	DBF_EVENT(3, "Error Recovery failed for %s\n",
		  tape_op_verbose[request->op]);
	tape_dump_sense_dbf(device, request, irb);
	return rc;
}

/*
 * Error Recovery do retry
 */
static inline int
tape_3590_erp_retry(struct tape_device *device, struct tape_request *request,
		    struct irb *irb)
{
	DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]);
	tape_dump_sense_dbf(device, request, irb);
	return TAPE_IO_RETRY;
}

/*
 * Handle unsolicited interrupts
 */
static int
tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb)
{
	if (irb->scsw.dstat == DEV_STAT_CHN_END)
		/* Probably result of halt ssch */
		return TAPE_IO_PENDING;
	else if (irb->scsw.dstat == 0x85)
		/* Device Ready -> check medium state */
		tape_3590_schedule_work(device, TO_MSEN);
	else if (irb->scsw.dstat & DEV_STAT_ATTENTION)
		tape_3590_schedule_work(device, TO_READ_ATTMSG);
	else {
		DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id);
		PRINT_WARN("Unsolicited IRQ (Device End) caught.\n");
		tape_dump_sense(device, NULL, irb);
	}
	return TAPE_IO_SUCCESS;
}

/*
 * Basic Recovery routine
 */
static int
tape_3590_erp_basic(struct tape_device *device, struct tape_request *request,
		    struct irb *irb, int rc)
{
	struct tape_3590_sense *sense;

	sense = (struct tape_3590_sense *) irb->ecw;

	switch (sense->bra) {
	case SENSE_BRA_PER:
		return tape_3590_erp_failed(device, request, irb, rc);
	case SENSE_BRA_CONT:
		return tape_3590_erp_succeded(device, request);
	case SENSE_BRA_RE:
		return tape_3590_erp_retry(device, request, irb);
	case SENSE_BRA_DRE:
		return tape_3590_erp_failed(device, request, irb, rc);
	default:
		PRINT_ERR("Unknown BRA %x - This should not happen!\n",
			  sense->bra);
		BUG();
		return TAPE_IO_STOP;
	}
}

/*
 *  RDL: Read Device (buffered) log
 */
static int
tape_3590_erp_read_buf_log(struct tape_device *device,
			   struct tape_request *request, struct irb *irb)
{
	/*
	 * We just do the basic error recovery at the moment (retry).
	 * Perhaps in the future, we read the log and dump it somewhere...
	 */
	return tape_3590_erp_basic(device, request, irb, -EIO);
}

/*
 *  SWAP: Swap Devices
 */
static int
tape_3590_erp_swap(struct tape_device *device, struct tape_request *request,
		   struct irb *irb)
{
	/*
	 * This error recovery should swap the tapes
	 * if the original has a problem. The operation
	 * should proceed with the new tape... this
	 * should probably be done in user space!
	 */
	PRINT_WARN("(%s): Swap Tape Device!\n", device->cdev->dev.bus_id);
	return tape_3590_erp_basic(device, request, irb, -EIO);
}

/*
 *  LBY: Long Busy
 */
static int
tape_3590_erp_long_busy(struct tape_device *device,
			struct tape_request *request, struct irb *irb)
{
	/* FIXME: how about WAITING for a minute ? */
	PRINT_WARN("(%s): Device is busy! Please wait a minute!\n",
		   device->cdev->dev.bus_id);
	return tape_3590_erp_basic(device, request, irb, -EBUSY);
}

/*
 *  SPI: Special Intercept
 */
static int
tape_3590_erp_special_interrupt(struct tape_device *device,
				struct tape_request *request, struct irb *irb)
{
	return tape_3590_erp_basic(device, request, irb, -EIO);
}

/*
 *  RDA: Read Alternate
 */
static int
tape_3590_erp_read_alternate(struct tape_device *device,
			     struct tape_request *request, struct irb *irb)
{
	struct tape_3590_disc_data *data;

	/*
	 * The issued Read Backward or Read Previous command is not
	 * supported by the device
	 * The recovery action should be to issue another command:
	 * Read Revious: if Read Backward is not supported
	 * Read Backward: if Read Previous is not supported
	 */
	data = device->discdata;
	if (data->read_back_op == READ_PREVIOUS) {
		DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n",
			  device->cdev_id);
		data->read_back_op = READ_BACKWARD;
	} else {
		DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n",
			  device->cdev_id);
		data->read_back_op = READ_PREVIOUS;
	}
	tape_3590_read_opposite(device, request);
	return tape_3590_erp_retry(device, request, irb);
}

/*
 * Error Recovery read opposite
 */
static int
tape_3590_erp_read_opposite(struct tape_device *device,
			    struct tape_request *request, struct irb *irb)
{
	switch (request->op) {
	case TO_RFO:
		/*
		 * We did read forward, but the data could not be read.
		 * We will read backward and then skip forward again.
		 */
		tape_3590_read_opposite(device, request);
		return tape_3590_erp_retry(device, request, irb);
	case TO_RBA:
		/* We tried to read forward and backward, but hat no success */
		return tape_3590_erp_failed(device, request, irb, -EIO);
		break;
	default:
		PRINT_WARN("read_opposite_recovery_called_with_op: %s\n",
			   tape_op_verbose[request->op]);
		return tape_3590_erp_failed(device, request, irb, -EIO);
	}
}

/*
 * Print an MIM (Media Information  Message) (message code f0)
 */
static void
tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb)
{
	struct tape_3590_sense *sense;

	sense = (struct tape_3590_sense *) irb->ecw;
	/* Exception Message */
	switch (sense->fmt.f70.emc) {
	case 0x02:
		PRINT_WARN("(%s): Data degraded\n", device->cdev->dev.bus_id);
		break;
	case 0x03:
		PRINT_WARN("(%s): Data degraded in partion %i\n",
			   device->cdev->dev.bus_id, sense->fmt.f70.mp);
		break;
	case 0x04:
		PRINT_WARN("(%s): Medium degraded\n", device->cdev->dev.bus_id);
		break;
	case 0x05:
		PRINT_WARN("(%s): Medium degraded in partition %i\n",
			   device->cdev->dev.bus_id, sense->fmt.f70.mp);
		break;
	case 0x06:
		PRINT_WARN("(%s): Block 0 Error\n", device->cdev->dev.bus_id);
		break;
	case 0x07:
		PRINT_WARN("(%s): Medium Exception 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f70.md);
		break;
	default:
		PRINT_WARN("(%s): MIM ExMsg: 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f70.emc);
		break;
	}
	/* Service Message */
	switch (sense->fmt.f70.smc) {
	case 0x02:
		PRINT_WARN("(%s): Reference Media maintenance procedure %i\n",
			   device->cdev->dev.bus_id, sense->fmt.f70.md);
		break;
	default:
		PRINT_WARN("(%s): MIM ServiceMsg: 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f70.smc);
		break;
	}
}

/*
 * Print an I/O Subsystem Service Information Message (message code f1)
 */
static void
tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb)
{
	struct tape_3590_sense *sense;

	sense = (struct tape_3590_sense *) irb->ecw;
	/* Exception Message */
	switch (sense->fmt.f71.emc) {
	case 0x01:
		PRINT_WARN("(%s): Effect of failure is unknown\n",
			   device->cdev->dev.bus_id);
		break;
	case 0x02:
		PRINT_WARN("(%s): CU Exception - no performance impact\n",
			   device->cdev->dev.bus_id);
		break;
	case 0x03:
		PRINT_WARN("(%s): CU Exception on channel interface 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
		break;
	case 0x04:
		PRINT_WARN("(%s): CU Exception on device path 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
		break;
	case 0x05:
		PRINT_WARN("(%s): CU Exception on library path 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
		break;
	case 0x06:
		PRINT_WARN("(%s): CU Exception on node 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
		break;
	case 0x07:
		PRINT_WARN("(%s): CU Exception on partition 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
		break;
	default:
		PRINT_WARN("(%s): SIM ExMsg: 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f71.emc);
	}
	/* Service Message */
	switch (sense->fmt.f71.smc) {
	case 0x01:
		PRINT_WARN("(%s): Repair impact is unknown\n",
			   device->cdev->dev.bus_id);
		break;
	case 0x02:
		PRINT_WARN("(%s): Repair will not impact cu performance\n",
			   device->cdev->dev.bus_id);
		break;
	case 0x03:
		if (sense->fmt.f71.mdf == 0)
			PRINT_WARN("(%s): Repair will disable node "
				   "0x%x on CU\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1]);
		else
			PRINT_WARN("(%s): Repair will disable nodes "
				   "(0x%x-0x%x) on CU\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
		break;
	case 0x04:
		if (sense->fmt.f71.mdf == 0)
			PRINT_WARN("(%s): Repair will disable cannel path "
				   "0x%x on CU\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1]);
		else
			PRINT_WARN("(%s): Repair will disable cannel paths "
				   "(0x%x-0x%x) on CU\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
		break;
	case 0x05:
		if (sense->fmt.f71.mdf == 0)
			PRINT_WARN("(%s): Repair will disable device path "
				   "0x%x on CU\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1]);
		else
			PRINT_WARN("(%s): Repair will disable device paths "
				   "(0x%x-0x%x) on CU\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
		break;
	case 0x06:
		if (sense->fmt.f71.mdf == 0)
			PRINT_WARN("(%s): Repair will disable library path "
				   "0x%x on CU\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1]);
		else
			PRINT_WARN("(%s): Repair will disable library paths "
				   "(0x%x-0x%x) on CU\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
		break;
	case 0x07:
		PRINT_WARN("(%s): Repair will disable access to CU\n",
			   device->cdev->dev.bus_id);
		break;
	default:
		PRINT_WARN("(%s): SIM ServiceMsg: 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f71.smc);
	}
}

/*
 * Print an Device Subsystem Service Information Message (message code f2)
 */
static void
tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb)
{
	struct tape_3590_sense *sense;

	sense = (struct tape_3590_sense *) irb->ecw;
	/* Exception Message */
	switch (sense->fmt.f71.emc) {
	case 0x01:
		PRINT_WARN("(%s): Effect of failure is unknown\n",
			   device->cdev->dev.bus_id);
		break;
	case 0x02:
		PRINT_WARN("(%s): DV Exception - no performance impact\n",
			   device->cdev->dev.bus_id);
		break;
	case 0x03:
		PRINT_WARN("(%s): DV Exception on channel interface 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
		break;
	case 0x04:
		PRINT_WARN("(%s): DV Exception on loader 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
		break;
	case 0x05:
		PRINT_WARN("(%s): DV Exception on message display 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f71.md[0]);
		break;
	case 0x06:
		PRINT_WARN("(%s): DV Exception in tape path\n",
			   device->cdev->dev.bus_id);
		break;
	case 0x07:
		PRINT_WARN("(%s): DV Exception in drive\n",
			   device->cdev->dev.bus_id);
		break;
	default:
		PRINT_WARN("(%s): DSIM ExMsg: 0x%02x\n",
			   device->cdev->dev.bus_id, sense->fmt.f71.emc);
	}
	/* Service Message */
	switch (sense->fmt.f71.smc) {
	case 0x01:
		PRINT_WARN("(%s): Repair impact is unknown\n",
			   device->cdev->dev.bus_id);
		break;
	case 0x02:
		PRINT_WARN("(%s): Repair will not impact device performance\n",
			   device->cdev->dev.bus_id);
		break;
	case 0x03:
		if (sense->fmt.f71.mdf == 0)
			PRINT_WARN("(%s): Repair will disable channel path "
				   "0x%x on DV\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1]);
		else
			PRINT_WARN("(%s): Repair will disable channel path "
				   "(0x%x-0x%x) on DV\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
		break;
	case 0x04:
		if (sense->fmt.f71.mdf == 0)
			PRINT_WARN("(%s): Repair will disable interface 0x%x "
				   "on DV\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1]);
		else
			PRINT_WARN("(%s): Repair will disable interfaces "
				   "(0x%x-0x%x) on DV\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
		break;
	case 0x05:
		if (sense->fmt.f71.mdf == 0)
			PRINT_WARN("(%s): Repair will disable loader 0x%x "
				   "on DV\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1]);
		else
			PRINT_WARN("(%s): Repair will disable loader "
				   "(0x%x-0x%x) on DV\n",
				   device->cdev->dev.bus_id,
				   sense->fmt.f71.md[1], sense->fmt.f71.md[2]);
		break;
	case 0x07:
		PRINT_WARN("(%s): Repair will disable access to DV\n",
			   device->cdev->dev.bus_id);
		break;