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| author | Jens Axboe <jens.axboe@oracle.com> | 2008-10-22 09:34:49 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-23 16:05:26 -0700 |
| commit | 2fca5ccf97d2c28bcfce44f5b07d85e74e3cd18e (patch) | |
| tree | 483dedd08d6ccbb56959eeb127e82ab8f84edf2e /drivers/ata/libata.h | |
| parent | 332edc2f7fa58b818dfed1cede60272eecc27c0a (diff) | |
| download | op-kernel-dev-2fca5ccf97d2c28bcfce44f5b07d85e74e3cd18e.zip op-kernel-dev-2fca5ccf97d2c28bcfce44f5b07d85e74e3cd18e.tar.gz | |
libata: switch to using block layer tagging support
libata currently has a pretty dumb ATA_MAX_QUEUE loop for finding
a free tag to use. Instead of fixing that up, convert libata to
using block layer tagging - gets rid of code in libata, and is also
much faster.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/ata/libata.h')
| -rw-r--r-- | drivers/ata/libata.h | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index fe2839e..d3831d3 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -74,7 +74,7 @@ extern struct ata_link *ata_dev_phys_link(struct ata_device *dev); extern void ata_force_cbl(struct ata_port *ap); extern u64 ata_tf_to_lba(const struct ata_taskfile *tf); extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf); -extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev); +extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag); 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); @@ -103,7 +103,6 @@ extern int ata_dev_configure(struct ata_device *dev); extern int sata_down_spd_limit(struct ata_link *link); extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel); extern void ata_sg_clean(struct ata_queued_cmd *qc); -extern void ata_qc_free(struct ata_queued_cmd *qc); extern void ata_qc_issue(struct ata_queued_cmd *qc); extern void __ata_qc_complete(struct ata_queued_cmd *qc); extern int atapi_check_dma(struct ata_queued_cmd *qc); @@ -119,6 +118,22 @@ extern struct ata_port *ata_port_alloc(struct ata_host *host); extern void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy); extern void ata_lpm_schedule(struct ata_port *ap, enum link_pm); +/** + * ata_qc_free - free unused ata_queued_cmd + * @qc: Command to complete + * + * Designed to free unused ata_queued_cmd object + * in case something prevents using it. + * + * LOCKING: + * spin_lock_irqsave(host lock) + */ +static inline void ata_qc_free(struct ata_queued_cmd *qc) +{ + qc->flags = 0; + qc->tag = ATA_TAG_POISON; +} + /* libata-acpi.c */ #ifdef CONFIG_ATA_ACPI extern void ata_acpi_associate_sata_port(struct ata_port *ap); |
