ide-taskfile.c

来自「ep9315平台下硬盘驱动的源码」· C语言 代码 · 共 2,241 行 · 第 1/5 页

#else

int ide_diag_taskfile (ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
{
	struct request *rq;
	unsigned long flags;
	ide_hwgroup_t *hwgroup = HWGROUP(drive);
	unsigned int major = HWIF(drive)->major;
	struct list_head *queue_head = &drive->queue.queue_head;
	DECLARE_COMPLETION(wait);

	if (HWIF(drive)->chipset == ide_pdc4030 && buf != NULL)
		return -ENOSYS; /* special drive cmds not supported */

	memset(rq, 0, sizeof(*rq));
	rq->cmd = IDE_DRIVE_TASKFILE;
	rq->buffer = buf;

	/*
	 * (ks) We transfer currently only whole sectors.
	 * This is suffient for now.  But, it would be great,
	 * if we would find a solution to transfer any size.
	 * To support special commands like READ LONG.
	 */
	if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
		if (data_size == 0) {
			ata_nsector_t nsector;
			nsector.b.low = args->hobRegister[IDE_NSECTOR_OFFSET_HOB];
			nsector.b.high = args->tfRegister[IDE_NSECTOR_OFFSET];
			rq.nr_sectors = nsector.all;
		} else {
			rq.nr_sectors = data_size / SECTOR_SIZE;
		}
		rq.current_nr_sectors = rq.nr_sectors;
	//	rq.hard_cur_sectors = rq.nr_sectors;
	}

	if (args->tf_out_flags.all == 0) {
		/*
		 * clean up kernel settings for driver sanity, regardless.
		 * except for discrete diag services.
		 */
		args->posthandler = ide_post_handler_parser(
				(struct hd_drive_task_hdr *) args->tfRegister,
				(struct hd_drive_hob_hdr *) args->hobRegister);
	}
	rq->special = args;
	rq->errors = 0;
	rq->rq_status = RQ_ACTIVE;
	rq->rq_dev = MKDEV(major,(drive->select.b.unit)<<PARTN_BITS);
	rq->waiting = &wait;

	spin_lock_irqsave(&io_request_lock, flags);
	queue_head = queue_head->prev;
	list_add(&rq->queue, queue_head);
	ide_do_request(hwgroup, 0);
	spin_unlock_irqrestore(&io_request_lock, flags);

	wait_for_completion(&wait);	/* wait for it to be serviced */
	return rq->errors ? -EIO : 0;	/* return -EIO if errors */
}

#endif

EXPORT_SYMBOL(ide_diag_taskfile);

int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
{
	return ide_diag_taskfile(drive, args, 0, buf);
}

EXPORT_SYMBOL(ide_raw_taskfile);
	
#ifdef CONFIG_IDE_TASK_IOCTL_DEBUG
char * ide_ioctl_verbose (unsigned int cmd)
{
	return("unknown");
}

char * ide_task_cmd_verbose (u8 task)
{
	return("unknown");
}
#endif /* CONFIG_IDE_TASK_IOCTL_DEBUG */

#define MAX_DMA		(256*SECTOR_WORDS)

ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
ide_startstop_t flagged_task_no_data_intr(ide_drive_t *);
ide_startstop_t flagged_task_in_intr(ide_drive_t *);
ide_startstop_t flagged_task_mulin_intr(ide_drive_t *);
ide_startstop_t flagged_pre_task_out_intr(ide_drive_t *, struct request *);
ide_startstop_t flagged_task_out_intr(ide_drive_t *);
ide_startstop_t flagged_pre_task_mulout_intr(ide_drive_t *, struct request *);
ide_startstop_t flagged_task_mulout_intr(ide_drive_t *);

int ide_taskfile_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
	ide_task_request_t	*req_task;
	ide_task_t		args;
	u8 *outbuf		= NULL;
	u8 *inbuf		= NULL;
	task_ioreg_t *argsptr	= args.tfRegister;
	task_ioreg_t *hobsptr	= args.hobRegister;
	int err			= 0;
	int tasksize		= sizeof(struct ide_task_request_s);
	int taskin		= 0;
	int taskout		= 0;
	u8 io_32bit		= drive->io_32bit;

//	printk("IDE Taskfile ...\n");

	req_task = kmalloc(tasksize, GFP_KERNEL);
	if (req_task == NULL) return -ENOMEM;
	memset(req_task, 0, tasksize);
	if (copy_from_user(req_task, (void *) arg, tasksize)) {
		kfree(req_task);
		return -EFAULT;
	}

	taskout = (int) req_task->out_size;
	taskin  = (int) req_task->in_size;

	if (taskout) {
		int outtotal = tasksize;
		outbuf = kmalloc(taskout, GFP_KERNEL);
		if (outbuf == NULL) {
			err = -ENOMEM;
			goto abort;
		}
		memset(outbuf, 0, taskout);
		if (copy_from_user(outbuf, (void *)arg + outtotal, taskout)) {
			err = -EFAULT;
			goto abort;
		}
	}

	if (taskin) {
		int intotal = tasksize + taskout;
		inbuf = kmalloc(taskin, GFP_KERNEL);
		if (inbuf == NULL) {
			err = -ENOMEM;
			goto abort;
		}
		memset(inbuf, 0, taskin);
		if (copy_from_user(inbuf, (void *)arg + intotal , taskin)) {
			err = -EFAULT;
			goto abort;
		}
	}

	memset(&args, 0, sizeof(ide_task_t));
	memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
	memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);

	args.tf_in_flags  = req_task->in_flags;
	args.tf_out_flags = req_task->out_flags;
	args.data_phase   = req_task->data_phase;
	args.command_type = req_task->req_cmd;

#ifdef CONFIG_IDE_TASK_IOCTL_DEBUG
	DTF("%s: ide_ioctl_cmd %s:  ide_task_cmd %s\n",
		drive->name,
		ide_ioctl_verbose(cmd),
		ide_task_cmd_verbose(args.tfRegister[IDE_COMMAND_OFFSET]));
#endif /* CONFIG_IDE_TASK_IOCTL_DEBUG */

	drive->io_32bit = 0;
	switch(req_task->data_phase) {
		case TASKFILE_OUT_DMAQ:
		case TASKFILE_OUT_DMA:
			err = ide_diag_taskfile(drive, &args, taskout, outbuf);
			break;
		case TASKFILE_IN_DMAQ:
		case TASKFILE_IN_DMA:
			err = ide_diag_taskfile(drive, &args, taskin, inbuf);
			break;
		case TASKFILE_IN_OUT:
#if 0
			args.prehandler = &pre_task_out_intr;
			args.handler = &task_out_intr;
			args.posthandler = NULL;
			err = ide_diag_taskfile(drive, &args, taskout, outbuf);
			args.prehandler = NULL;
			args.handler = &task_in_intr;
			args.posthandler = NULL;
			err = ide_diag_taskfile(drive, &args, taskin, inbuf);
			break;
#else
			err = -EFAULT;
			goto abort;
#endif
		case TASKFILE_MULTI_OUT:
			if (!drive->mult_count) {
				/* (hs): give up if multcount is not set */
				printk(KERN_ERR "%s: %s Multimode Write " \
					"multcount is not set\n",
					drive->name, __FUNCTION__);
				err = -EPERM;
				goto abort;
			}
			if (args.tf_out_flags.all != 0) {
				args.prehandler = &flagged_pre_task_mulout_intr;
				args.handler = &flagged_task_mulout_intr;
			} else {
				args.prehandler = &pre_task_mulout_intr;
				args.handler = &task_mulout_intr;
			}
			err = ide_diag_taskfile(drive, &args, taskout, outbuf);
			break;
		case TASKFILE_OUT:
			if (args.tf_out_flags.all != 0) {
				args.prehandler = &flagged_pre_task_out_intr;
				args.handler    = &flagged_task_out_intr;
			} else {
				args.prehandler = &pre_task_out_intr;
				args.handler = &task_out_intr;
			}
			err = ide_diag_taskfile(drive, &args, taskout, outbuf);
			break;
		case TASKFILE_MULTI_IN:
			if (!drive->mult_count) {
				/* (hs): give up if multcount is not set */
				printk(KERN_ERR "%s: %s Multimode Read failure " \
					"multcount is not set\n",
					drive->name, __FUNCTION__);
				err = -EPERM;
				goto abort;
			}
			if (args.tf_out_flags.all != 0) {
				args.handler = &flagged_task_mulin_intr;
			} else {
				args.handler = &task_mulin_intr;
			}
			err = ide_diag_taskfile(drive, &args, taskin, inbuf);
			break;
		case TASKFILE_IN:
			if (args.tf_out_flags.all != 0) {
				args.handler = &flagged_task_in_intr;
			} else {
				args.handler = &task_in_intr;
			}
			err = ide_diag_taskfile(drive, &args, taskin, inbuf);
			break;
		case TASKFILE_NO_DATA:
			if (args.tf_out_flags.all != 0) {
				args.handler = &flagged_task_no_data_intr;
			} else {
				args.handler = &task_no_data_intr;
			}
			err = ide_diag_taskfile(drive, &args, 0, NULL);
			break;
		default:
			err = -EFAULT;
			goto abort;
	}

	memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
	memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
	req_task->in_flags  = args.tf_in_flags;
	req_task->out_flags = args.tf_out_flags;

	if (copy_to_user((void *)arg, req_task, tasksize)) {
		err = -EFAULT;
		goto abort;
	}
	if (taskout) {
		int outtotal = tasksize;
		if (copy_to_user((void *)arg+outtotal, outbuf, taskout)) {
			err = -EFAULT;
			goto abort;
		}
	}
	if (taskin) {
		int intotal = tasksize + taskout;
		if (copy_to_user((void *)arg+intotal, inbuf, taskin)) {
			err = -EFAULT;
			goto abort;
		}
	}
abort:
	kfree(req_task);
	if (outbuf != NULL)
		kfree(outbuf);
	if (inbuf != NULL)
		kfree(inbuf);

//	printk("IDE Taskfile ioctl ended. rc = %i\n", err);

	drive->io_32bit = io_32bit;

	return err;
}

EXPORT_SYMBOL(ide_taskfile_ioctl);

int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
{
	struct request rq;
	u8 buffer[4];

	if (!buf)
		buf = buffer;
	memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
	ide_init_drive_cmd(&rq);
	rq.buffer = buf;
	*buf++ = cmd;
	*buf++ = nsect;
	*buf++ = feature;
	*buf++ = sectors;
	return ide_do_drive_cmd(drive, &rq, ide_wait);
}

EXPORT_SYMBOL(ide_wait_cmd);

/*
 * FIXME : this needs to map into at taskfile. <[e-mail]>
 */
int ide_cmd_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
#if 1
	int err = -EIO;
	u8 args[4], *argbuf = args;
	u8 xfer_rate = 0;
	int argsize = 4;
	ide_task_t tfargs;

	if (NULL == (void *) arg) {
		struct request rq;
		ide_init_drive_cmd(&rq);
		return ide_do_drive_cmd(drive, &rq, ide_wait);
	}

	if (copy_from_user(args, (void *)arg, 4))
		return -EFAULT;

	memset(&tfargs, 0, sizeof(ide_task_t));
	tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
	tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
	tfargs.tfRegister[IDE_SECTOR_OFFSET]  = args[1];
	tfargs.tfRegister[IDE_LCYL_OFFSET]    = 0x00;
	tfargs.tfRegister[IDE_HCYL_OFFSET]    = 0x00;
	tfargs.tfRegister[IDE_SELECT_OFFSET]  = 0x00;
	tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];

	if (args[3]) {
		argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
		argbuf = kmalloc(argsize, GFP_KERNEL);
		if (argbuf == NULL)
			return -ENOMEM;
		memcpy(argbuf, args, 4);
	}
	if (set_transfer(drive, &tfargs)) {
		xfer_rate = args[1];
		if (ide_ata66_check(drive, &tfargs))
			goto abort;
	}

	err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);

	if (!err && xfer_rate) {
		/* active-retuning-calls future */
		ide_set_xfer_rate(drive, xfer_rate);
		ide_driveid_update(drive);
	}
abort:
	if (copy_to_user((void *)arg, argbuf, argsize))
		err = -EFAULT;
	if (argsize > 4)
		kfree(argbuf);
	return err;

#else

	int err = 0;
	u8 args[4], *argbuf = args;
	u8 xfer_rate = 0;
	int argsize = 0;
	ide_task_t tfargs;

	if (NULL == (void *) arg) {
		struct request rq;
		ide_init_drive_cmd(&rq);
		return ide_do_drive_cmd(drive, &rq, ide_wait);
	}

	if (copy_from_user(args, (void *)arg, 4))
		return -EFAULT;

	memset(&tfargs, 0, sizeof(ide_task_t));
	tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
	tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
	tfargs.tfRegister[IDE_SECTOR_OFFSET]  = args[1];
	tfargs.tfRegister[IDE_LCYL_OFFSET]    = 0x00;
	tfargs.tfRegister[IDE_HCYL_OFFSET]    = 0x00;
	tfargs.tfRegister[IDE_SELECT_OFFSET]  = 0x00;
	tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];

	if (args[3]) {
		argsize = (SECTOR_WORDS * 4 * args[3]);
		argbuf = kmalloc(argsize, GFP_KERNEL);
		if (argbuf == NULL)
			return -ENOMEM;
	}

	if (set_transfer(drive, &tfargs)) {
		xfer_rate = args[1];
		if (ide_ata66_check(drive, &tfargs))
			goto abort;
	}

	tfargs.command_type = ide_cmd_type_parser(&tfargs);
	err = ide_raw_taskfile(drive, &tfargs, argbuf);

	if (!err && xfer_rate) {
		/* active-retuning-calls future */
		ide_set_xfer_rate(drive, xfer_rate);
		ide_driveid_update(drive);
	}
abort:
	args[0] = tfargs.tfRegister[IDE_COMMAND_OFFSET];
	args[1] = tfargs.tfRegister[IDE_FEATURE_OFFSET];
	args[2] = tfargs.tfRegister[IDE_NSECTOR_OFFSET];
	args[3] = 0;

	if (copy_to_user((void *)arg, argbuf, 4))
		err = -EFAULT;
	if (argbuf != NULL) {
		if (copy_to_user((void *)arg, argbuf + 4, argsize))
			err = -EFAULT;
		kfree(argbuf);
	}
	return err;

#endif
}

EXPORT_SYMBOL(ide_cmd_ioctl);

int ide_wait_cmd_task (ide_drive_t *drive, u8 *buf)
{
	struct request rq;

	ide_init_drive_cmd(&rq);
	rq.cmd = IDE_DRIVE_TASK;
	rq.buffer = buf;
	return ide_do_drive_cmd(drive, &rq, ide_wait);
}