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-rw-r--r--drivers/ata/libata-core.c66
-rw-r--r--drivers/ata/libata-scsi.c23
-rw-r--r--drivers/ata/libata.h19
-rw-r--r--include/linux/libata.h1
4 files changed, 65 insertions, 44 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 622350d9b2e..0cd3ad49713 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1712,6 +1712,8 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
else
tag = 0;
+ if (test_and_set_bit(tag, &ap->qc_allocated))
+ BUG();
qc = __ata_qc_from_tag(ap, tag);
qc->tag = tag;
@@ -4563,6 +4565,37 @@ void swap_buf_le16(u16 *buf, unsigned int buf_words)
}
/**
+ * ata_qc_new - Request an available ATA command, for queueing
+ * @ap: Port associated with device @dev
+ * @dev: Device from whom we request an available command structure
+ *
+ * LOCKING:
+ * None.
+ */
+
+static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
+{
+ struct ata_queued_cmd *qc = NULL;
+ unsigned int i;
+
+ /* no command while frozen */
+ if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
+ return NULL;
+
+ /* the last tag is reserved for internal command. */
+ for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
+ if (!test_and_set_bit(i, &ap->qc_allocated)) {
+ qc = __ata_qc_from_tag(ap, i);
+ break;
+ }
+
+ if (qc)
+ qc->tag = i;
+
+ return qc;
+}
+
+/**
* ata_qc_new_init - Request an available ATA command, and initialize it
* @dev: Device from whom we request an available command structure
* @tag: command tag
@@ -4571,20 +4604,16 @@ void swap_buf_le16(u16 *buf, unsigned int buf_words)
* None.
*/
-struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag)
+struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
{
struct ata_port *ap = dev->link->ap;
struct ata_queued_cmd *qc;
- if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
- return NULL;
-
- qc = __ata_qc_from_tag(ap, tag);
+ qc = ata_qc_new(ap);
if (qc) {
qc->scsicmd = NULL;
qc->ap = ap;
qc->dev = dev;
- qc->tag = tag;
ata_qc_reinit(qc);
}
@@ -4592,6 +4621,31 @@ struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag)
return qc;
}
+/**
+ * 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)
+ */
+void ata_qc_free(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ unsigned int tag;
+
+ WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
+
+ qc->flags = 0;
+ tag = qc->tag;
+ if (likely(ata_tag_valid(tag))) {
+ qc->tag = ATA_TAG_POISON;
+ clear_bit(tag, &ap->qc_allocated);
+ }
+}
+
void __ata_qc_complete(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 3fa75eac135..47c7afcb36f 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -709,11 +709,7 @@ static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
{
struct ata_queued_cmd *qc;
- if (cmd->request->tag != -1)
- qc = ata_qc_new_init(dev, cmd->request->tag);
- else
- qc = ata_qc_new_init(dev, 0);
-
+ qc = ata_qc_new_init(dev);
if (qc) {
qc->scsicmd = cmd;
qc->scsidone = done;
@@ -1108,17 +1104,7 @@ static int ata_scsi_dev_config(struct scsi_device *sdev,
depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
depth = min(ATA_MAX_QUEUE - 1, depth);
-
- /*
- * If this device is behind a port multiplier, we have
- * to share the tag map between all devices on that PMP.
- * Set up the shared tag map here and we get automatic.
- */
- if (dev->link->ap->pmp_link)
- scsi_init_shared_tag_map(sdev->host, ATA_MAX_QUEUE - 1);
-
- scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
- scsi_activate_tcq(sdev, depth);
+ scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
}
return 0;
@@ -1958,11 +1944,6 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
hdr[1] |= (1 << 7);
memcpy(rbuf, hdr, sizeof(hdr));
-
- /* if ncq, set tags supported */
- if (ata_id_has_ncq(args->id))
- rbuf[7] |= (1 << 1);
-
memcpy(&rbuf[8], "ATA ", 8);
ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index d3831d39bda..fe2839e5877 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, int tag);
+extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
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);
@@ -103,6 +103,7 @@ 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);
@@ -118,22 +119,6 @@ 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);
diff --git a/include/linux/libata.h b/include/linux/libata.h
index c7665a4134c..59b0f1c807b 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -698,6 +698,7 @@ struct ata_port {
unsigned int cbl; /* cable type; ATA_CBL_xxx */
struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
+ unsigned long qc_allocated;
unsigned int qc_active;
int nr_active_links; /* #links with active qcs */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 03:30:55 +0000