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ide: refactor tf_read() method

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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: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Sergei Shtylyov 2009-04-08 14:13:03 +02:00 committed by Bartlomiej Zolnierkiewicz
parent c9ff9e7b64
commit 3153c26b54
10 changed files with 40 additions and 101 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
drivers/ide/ide-atapi.c
View file

@ -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;
struct ide_taskfile tf;
memset(&cmd, 0, sizeof(cmd));
cmd.valid.in.tf = IDE_VALID_NSECT;
drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT);
drive->hwif->tp_ops->tf_read(drive, &cmd);
return cmd.tf.nsect & 3;
return tf.nsect & 3;
}
static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)

25
drivers/ide/ide-io-std.c
View file

@ -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);

2
drivers/ide/ide-io.c
View file

@ -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) {

9
drivers/ide/ide-iops.c
View file

@ -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;
struct ide_taskfile tf;
memset(&cmd, 0, sizeof(cmd));
cmd.valid.in.tf = IDE_VALID_ERROR;
drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_ERROR);
drive->hwif->tp_ops->tf_read(drive, &cmd);
return cmd.tf.error;
return tf.error;
}
EXPORT_SYMBOL_GPL(ide_read_error);

2
drivers/ide/ide-lib.c
View file

@ -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",

9
drivers/ide/ide-probe.c
View file

@ -335,14 +335,11 @@ int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus)
static u8 ide_read_device(ide_drive_t *drive)
{
struct ide_cmd cmd;
struct ide_taskfile tf;
memset(&cmd, 0, sizeof(cmd));
cmd.valid.in.tf = IDE_VALID_DEVICE;
drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE);
drive->hwif->tp_ops->tf_read(drive, &cmd);
return cmd.tf.device;
return tf.device;
}
/**

17
drivers/ide/ide-taskfile.c
View file

@ -23,6 +23,23 @@
#include <asm/uaccess.h>
#include <asm/io.h>
void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
/* Be sure we're looking at the low order bytes */
tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
if (cmd->tf_flags & IDE_TFLAG_LBA48) {
tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
}
}
void ide_tf_dump(const char *s, struct ide_cmd *cmd)
{
#ifdef DEBUG

26
drivers/ide/ns87415.c
View file

@ -61,14 +61,10 @@ static u8 superio_dma_sff_read_status(ide_hwif_t *hwif)
return superio_ide_inb(hwif->dma_base + ATA_DMA_STATUS);
}
static void superio_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
static void superio_tf_read(ide_drive_t *drive, struct ide_taskfile *tf,
u8 valid)
{
struct ide_io_ports *io_ports = &drive->hwif->io_ports;
struct ide_taskfile *tf = &cmd->tf;
u8 valid = cmd->valid.in.tf;
/* be sure we're looking at the low order bits */
ide_write_devctl(hwif, ATA_DEVCTL_OBS);
if (valid & IDE_VALID_ERROR)
tf->error = inb(io_ports->feature_addr);
@ -82,24 +78,6 @@ static void superio_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
tf->lbah = inb(io_ports->lbah_addr);
if (valid & IDE_VALID_DEVICE)
tf->device = superio_ide_inb(io_ports->device_addr);
if (cmd->tf_flags & IDE_TFLAG_LBA48) {
ide_write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
tf = &cmd->hob;
valid = cmd->valid.in.hob;
if (valid & IDE_VALID_ERROR)
tf->error = inb(io_ports->feature_addr);
if (valid & IDE_VALID_NSECT)
tf->nsect = inb(io_ports->nsect_addr);
if (valid & IDE_VALID_LBAL)
tf->lbal = inb(io_ports->lbal_addr);
if (valid & IDE_VALID_LBAM)
tf->lbam = inb(io_ports->lbam_addr);
if (valid & IDE_VALID_LBAH)
tf->lbah = inb(io_ports->lbah_addr);
}
}
static void ns87415_dev_select(ide_drive_t *drive);

25
drivers/ide/scc_pata.c
View file

@ -663,14 +663,9 @@ static void scc_tf_load(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)
scc_ide_outb(tf->device, io_ports->device_addr);
}
static void scc_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
static void scc_tf_read(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)
{
struct ide_io_ports *io_ports = &drive->hwif->io_ports;
struct ide_taskfile *tf = &cmd->tf;
u8 valid = cmd->valid.in.tf;
/* be sure we're looking at the low order bits */
scc_write_devctl(hwif, ATA_DEVCTL_OBS);
if (valid & IDE_VALID_ERROR)
tf->error = scc_ide_inb(io_ports->feature_addr);
@ -684,24 +679,6 @@ static void scc_tf_read(ide_drive_t *drive, struct ide_cmd *cmd)
tf->lbah = scc_ide_inb(io_ports->lbah_addr);
if (valid & IDE_VALID_DEVICE)
tf->device = scc_ide_inb(io_ports->device_addr);
if (cmd->tf_flags & IDE_TFLAG_LBA48) {
scc_write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
tf = &cmd->hob;
valid = cmd->valid.in.hob;
if (valid & IDE_VALID_ERROR)
tf->error = scc_ide_inb(io_ports->feature_addr);
if (valid & IDE_VALID_NSECT)
tf->nsect = scc_ide_inb(io_ports->nsect_addr);
if (valid & IDE_VALID_LBAL)
tf->lbal = scc_ide_inb(io_ports->lbal_addr);
if (valid & IDE_VALID_LBAM)
tf->lbam = scc_ide_inb(io_ports->lbam_addr);
if (valid & IDE_VALID_LBAH)
tf->lbah = scc_ide_inb(io_ports->lbah_addr);
}
}
static void scc_input_data(ide_drive_t *drive, struct ide_cmd *cmd,

5
include/linux/ide.h
View file

@ -625,7 +625,7 @@ struct ide_tp_ops {
void (*dev_select)(ide_drive_t *);
void (*tf_load)(ide_drive_t *, struct ide_taskfile *, u8);
void (*tf_read)(ide_drive_t *, struct ide_cmd *);
void (*tf_read)(ide_drive_t *, struct ide_taskfile *, u8);
void (*input_data)(ide_drive_t *, struct ide_cmd *,
void *, unsigned int);
@ -1124,6 +1124,7 @@ extern int ide_devset_execute(ide_drive_t *drive,
void ide_complete_cmd(ide_drive_t *, struct ide_cmd *, u8, u8);
int ide_complete_rq(ide_drive_t *, int, unsigned int);
void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd);
void ide_tf_dump(const char *, struct ide_cmd *);
void ide_exec_command(ide_hwif_t *, u8);
@ -1133,7 +1134,7 @@ void ide_write_devctl(ide_hwif_t *, u8);
void ide_dev_select(ide_drive_t *);
void ide_tf_load(ide_drive_t *, struct ide_taskfile *, u8);
void ide_tf_read(ide_drive_t *, struct ide_cmd *);
void ide_tf_read(ide_drive_t *, struct ide_taskfile *, u8);
void ide_input_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);
void ide_output_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);