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ata: libata-core: Simplify ata_build_rw_tf()

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Since ata_build_rw_tf() is only called from ata_scsi_rw_xlat() with the
tf, dev and tag arguments obtained from the queued command structure,
we can simplify the interface of ata_build_rw_tf() by passing directly
the qc structure as argument.

Furthermore, since ata_scsi_rw_xlat() is never used for internal
commands, we can also remove the internal tag check for the NCQ case.

Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
This commit is contained in:
Damien Le Moal 2022-07-25 10:01:27 +09:00
parent e00923c59e
commit 066de3b9d9
3 changed files with 13 additions and 16 deletions
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20
drivers/ata/libata-core.c
View File

@ -665,33 +665,33 @@ u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)
/**
* ata_build_rw_tf - Build ATA taskfile for given read/write request
* @tf: Target ATA taskfile
* @dev: ATA device @tf belongs to
* @qc: Metadata associated with the taskfile to build
* @block: Block address
* @n_block: Number of blocks
* @tf_flags: RW/FUA etc...
* @tag: tag
* @class: IO priority class
*
* LOCKING:
* None.
*
* Build ATA taskfile @tf for read/write request described by
* @block, @n_block, @tf_flags and @tag on @dev.
* Build ATA taskfile for the command @qc for read/write request described
* by @block, @n_block, @tf_flags and @class.
*
* RETURNS:
*
* 0 on success, -ERANGE if the request is too large for @dev,
* -EINVAL if the request is invalid.
*/
int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
u64 block, u32 n_block, unsigned int tf_flags,
unsigned int tag, int class)
int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block,
unsigned int tf_flags, int class)
{
struct ata_taskfile *tf = &qc->tf;
struct ata_device *dev = qc->dev;
tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
tf->flags |= tf_flags;
if (ata_ncq_enabled(dev) && !ata_tag_internal(tag)) {
if (ata_ncq_enabled(dev)) {
/* yay, NCQ */
if (!lba_48_ok(block, n_block))
return -ERANGE;
@ -704,7 +704,7 @@ int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
else
tf->command = ATA_CMD_FPDMA_READ;
tf->nsect = tag << 3;
tf->nsect = qc->hw_tag << 3;
tf->hob_feature = (n_block >> 8) & 0xff;
tf->feature = n_block & 0xff;

4
drivers/ata/libata-scsi.c
View File

@ -1605,9 +1605,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
qc->flags |= ATA_QCFLAG_IO;
qc->nbytes = n_block * scmd->device->sector_size;
rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
qc->hw_tag, class);
rc = ata_build_rw_tf(qc, block, n_block, tf_flags, class);
if (likely(rc == 0))
return 0;

5
drivers/ata/libata.h
View File

@ -44,9 +44,8 @@ static inline void ata_force_cbl(struct ata_port *ap) { }
#endif
extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
u64 block, u32 n_block, unsigned int tf_flags,
unsigned int tag, int class);
extern int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block,
unsigned int tf_flags, int class);
extern u64 ata_tf_read_block(const struct ata_taskfile *tf,
struct ata_device *dev);
extern unsigned ata_exec_internal(struct ata_device *dev,