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[PATCH] libata-ncq: implement ap->qc_active, ap->sactive and complete helper

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Add ap->qc_active and ap->sactive, mask of all active qcs and libata's
view of the SActive register, respectively.  Also, implement
ata_qc_complete_multiple() which takes new qc_active mask and complete
multiple qcs according to the mask.

These will be used to track NCQ commands and complete them.  The
distinction between ap->qc_active and ap->sactive is also useful for
later PM implementation.

Signed-off-by: Tejun Heo <htejun@gmail.com>
This commit is contained in:
Tejun Heo 2006-05-15 21:03:43 +09:00
parent 6cec4a3943
commit dedaf2b036
2 changed files with 84 additions and 2 deletions
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5
include/linux/libata.h
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@ -475,7 +475,10 @@ struct ata_port {
struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
unsigned long qc_allocated;
unsigned int qc_active;
unsigned int active_tag;
u32 sactive;
struct ata_host_stats stats;
struct ata_host_set *host_set;
@ -668,6 +671,8 @@ extern void ata_bmdma_drive_eh(struct ata_port *ap,
extern void ata_bmdma_error_handler(struct ata_port *ap);
extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
extern void ata_qc_complete(struct ata_queued_cmd *qc);
extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
void (*finish_qc)(struct ata_queued_cmd *));
extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *));
extern int ata_std_bios_param(struct scsi_device *sdev,