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Commit 3153c26b authored by Sergei Shtylyov's avatar Sergei Shtylyov Committed by Bartlomiej Zolnierkiewicz
Browse files

ide: refactor tf_read() method 



Simplify tf_read() method, making it deal only with 'struct ide_taskfile' and
the validity flags that the upper layer passes, and factoring out the code that
deals with the high order bytes into ide_tf_readback() to be called from the
only two functions interested, ide_complete_cmd() and ide_dump_sector().

This should stop the needless code duplication in this method and so make
it about twice smaller than it was; along with simplifying the setup for
the method call, this should save both time and space...

Signed-off-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent c9ff9e7b

drivers/ide/ide-atapi.c

+8 −13
Original line number Diff line number Diff line
@@ -254,15 +254,13 @@ EXPORT_SYMBOL_GPL(ide_cd_get_xferlen); 


void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)

{

	struct ide_cmd cmd;

	struct ide_taskfile tf;



	memset(&cmd, 0, sizeof(cmd));

	cmd.valid.in.tf = IDE_VALID_LBAH | IDE_VALID_LBAM | IDE_VALID_NSECT;

	drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT |

				     IDE_VALID_LBAM | IDE_VALID_LBAH);



	drive->hwif->tp_ops->tf_read(drive, &cmd);



	*bcount = (cmd.tf.lbah << 8) | cmd.tf.lbam;

	*ireason = cmd.tf.nsect & 3;

	*bcount = (tf.lbah << 8) | tf.lbam;

	*ireason = tf.nsect & 3;

}

EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
@@ -452,14 +450,11 @@ static void ide_init_packet_cmd(struct ide_cmd *cmd, u8 valid_tf, 


static u8 ide_read_ireason(ide_drive_t *drive)

{

	struct ide_cmd cmd;



	memset(&cmd, 0, sizeof(cmd));

	cmd.valid.in.tf = IDE_VALID_NSECT;

	struct ide_taskfile tf;



	drive->hwif->tp_ops->tf_read(drive, &cmd);

	drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT);



	return cmd.tf.nsect & 3;

	return tf.nsect & 3;

}



static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)

drivers/ide/ide-io-std.c

+1 −24
Original line number Diff line number Diff line
@@ -112,13 +112,11 @@ void ide_tf_load(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid) 
}

EXPORT_SYMBOL_GPL(ide_tf_load);



void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)

void ide_tf_read(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)

{

	ide_hwif_t *hwif = drive->hwif;

	struct ide_io_ports *io_ports = &hwif->io_ports;

	struct ide_taskfile *tf = &cmd->tf;

	u8 (*tf_inb)(unsigned long port);

	u8 valid = cmd->valid.in.tf;

	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;



	if (mmio)
@@ -126,9 +124,6 @@ void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd) 
	else

		tf_inb  = ide_inb;



	/* be sure we're looking at the low order bits */

	hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);



	if (valid & IDE_VALID_ERROR)

		tf->error  = tf_inb(io_ports->feature_addr);

	if (valid & IDE_VALID_NSECT)
@@ -141,24 +136,6 @@ void ide_tf_read(ide_drive_t *drive, struct ide_cmd *cmd) 
		tf->lbah   = tf_inb(io_ports->lbah_addr);

	if (valid & IDE_VALID_DEVICE)

		tf->device = tf_inb(io_ports->device_addr);



	if (cmd->tf_flags & IDE_TFLAG_LBA48) {

		hwif->tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);



		tf = &cmd->hob;

		valid = cmd->valid.in.hob;



		if (valid & IDE_VALID_ERROR)

			tf->error = tf_inb(io_ports->feature_addr);

		if (valid & IDE_VALID_NSECT)

			tf->nsect = tf_inb(io_ports->nsect_addr);

		if (valid & IDE_VALID_LBAL)

			tf->lbal  = tf_inb(io_ports->lbal_addr);

		if (valid & IDE_VALID_LBAM)

			tf->lbam  = tf_inb(io_ports->lbam_addr);

		if (valid & IDE_VALID_LBAH)

			tf->lbah  = tf_inb(io_ports->lbah_addr);

	}

}

EXPORT_SYMBOL_GPL(ide_tf_read);

drivers/ide/ide-io.c

+1 −1
Original line number Diff line number Diff line
@@ -90,7 +90,7 @@ void ide_complete_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat, u8 err) 
		cmd->hob.data = data[1];

	}



	tp_ops->tf_read(drive, cmd);

	ide_tf_readback(drive, cmd);



	if ((cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) &&

	    tf_cmd == ATA_CMD_IDLEIMMEDIATE) {

drivers/ide/ide-iops.c

+3 −6
Original line number Diff line number Diff line
@@ -37,14 +37,11 @@ void SELECT_MASK(ide_drive_t *drive, int mask) 


u8 ide_read_error(ide_drive_t *drive)

{

	struct ide_cmd cmd;



	memset(&cmd, 0, sizeof(cmd));

	cmd.valid.in.tf = IDE_VALID_ERROR;

	struct ide_taskfile tf;



	drive->hwif->tp_ops->tf_read(drive, &cmd);

	drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_ERROR);



	return cmd.tf.error;

	return tf.error;

}

EXPORT_SYMBOL_GPL(ide_read_error);

drivers/ide/ide-lib.c

+1 −1
Original line number Diff line number Diff line
@@ -79,7 +79,7 @@ static void ide_dump_sector(ide_drive_t *drive) 
	} else

		cmd.valid.in.tf  = IDE_VALID_LBA | IDE_VALID_DEVICE;



	drive->hwif->tp_ops->tf_read(drive, &cmd);

	ide_tf_readback(drive, &cmd);



	if (lba48 || (tf->device & ATA_LBA))

		printk(KERN_CONT ", LBAsect=%llu",