[PATCH] libata-ncq: implement ap->qc_active, ap->sactive and complete helper
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>
diff --git a/include/linux/libata.h b/include/linux/libata.h
index b3a4f8b..dd0db2d 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -475,7 +475,10 @@
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_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,