Add tracepoints for bus-master DMA and taskfile related functions.
That allows us to drop the relevant DPRINTK() calls.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
drivers/ata/libata-core.c | 5 ++
drivers/ata/libata-sff.c | 23 ++++++--
include/trace/events/libata.h | 100 ++++++++++++++++++++++++++++++++++
3 files changed, 123 insertions(+), 5 deletions(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 02cd8fe1acab..ef5ae37bfac0 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6614,3 +6614,8 @@ void ata_print_version(const struct device *dev, const char *version)
dev_printk(KERN_DEBUG, dev, "version %s\n", version);
}
EXPORT_SYMBOL(ata_print_version);
+
+EXPORT_TRACEPOINT_SYMBOL_GPL(ata_tf_load);
+EXPORT_TRACEPOINT_SYMBOL_GPL(ata_exec_command);
+EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_setup);
+EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_start);
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 4cc7c0606e06..60ac93a0bafb 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -18,7 +18,7 @@
#include <linux/module.h>
#include <linux/libata.h>
#include <linux/highmem.h>
-
+#include <trace/events/libata.h>
#include "libata.h"
static struct workqueue_struct *ata_sff_wq;
@@ -505,6 +505,7 @@ EXPORT_SYMBOL_GPL(ata_sff_exec_command);
* ata_tf_to_host - issue ATA taskfile to host controller
* @ap: port to which command is being issued
* @tf: ATA taskfile register set
+ * @tag: tag of the associated command
*
* Issues ATA taskfile register set to ATA host controller,
* with proper synchronization with interrupt handler and
@@ -514,9 +515,12 @@ EXPORT_SYMBOL_GPL(ata_sff_exec_command);
* spin_lock_irqsave(host lock)
*/
static inline void ata_tf_to_host(struct ata_port *ap,
- const struct ata_taskfile *tf)
+ const struct ata_taskfile *tf,
+ unsigned int tag)
{
+ trace_ata_tf_load(ap, tf);
ap->ops->sff_tf_load(ap, tf);
+ trace_ata_exec_command(ap, tf, tag);
ap->ops->sff_exec_command(ap, tf);
}
@@ -768,6 +772,7 @@ static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
case ATAPI_PROT_DMA:
ap->hsm_task_state = HSM_ST_LAST;
/* initiate bmdma */
+ trace_ata_bmdma_start(ap, &qc->tf, qc->tag);
ap->ops->bmdma_start(qc);
break;
#endif /* CONFIG_ATA_BMDMA */
@@ -1376,7 +1381,7 @@ unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc)
if (qc->tf.flags & ATA_TFLAG_POLLING)
ata_qc_set_polling(qc);
- ata_tf_to_host(ap, &qc->tf);
+ ata_tf_to_host(ap, &qc->tf, qc->tag);
ap->hsm_task_state = HSM_ST_LAST;
if (qc->tf.flags & ATA_TFLAG_POLLING)
@@ -1388,7 +1393,7 @@ unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc)
if (qc->tf.flags & ATA_TFLAG_POLLING)
ata_qc_set_polling(qc);
- ata_tf_to_host(ap, &qc->tf);
+ ata_tf_to_host(ap, &qc->tf, qc->tag);
if (qc->tf.flags & ATA_TFLAG_WRITE) {
/* PIO data out protocol */
@@ -1418,7 +1423,7 @@ unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc)
if (qc->tf.flags & ATA_TFLAG_POLLING)
ata_qc_set_polling(qc);
- ata_tf_to_host(ap, &qc->tf);
+ ata_tf_to_host(ap, &qc->tf, qc->tag);
ap->hsm_task_state = HSM_ST_FIRST;
@@ -2745,8 +2750,11 @@ unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc)
case ATA_PROT_DMA:
WARN_ON_ONCE(qc->tf.flags & ATA_TFLAG_POLLING);
+ trace_ata_tf_load(ap, &qc->tf);
ap->ops->sff_tf_load(ap, &qc->tf); /* load tf registers */
+ trace_ata_bmdma_setup(ap, &qc->tf, qc->tag);
ap->ops->bmdma_setup(qc); /* set up bmdma */
+ trace_ata_bmdma_start(ap, &qc->tf, qc->tag);
ap->ops->bmdma_start(qc); /* initiate bmdma */
ap->hsm_task_state = HSM_ST_LAST;
break;
@@ -2754,7 +2762,9 @@ unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc)
case ATAPI_PROT_DMA:
WARN_ON_ONCE(qc->tf.flags & ATA_TFLAG_POLLING);
+ trace_ata_tf_load(ap, &qc->tf);
ap->ops->sff_tf_load(ap, &qc->tf); /* load tf registers */
+ trace_ata_bmdma_setup(ap, &qc->tf, qc->tag);
ap->ops->bmdma_setup(qc); /* set up bmdma */
ap->hsm_task_state = HSM_ST_FIRST;
@@ -2802,6 +2812,7 @@ unsigned int ata_bmdma_port_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
return ata_sff_idle_irq(ap);
/* before we do anything else, clear DMA-Start bit */
+ trace_ata_bmdma_stop(ap, &qc->tf, qc->tag);
ap->ops->bmdma_stop(qc);
bmdma_stopped = true;
@@ -2881,6 +2892,7 @@ void ata_bmdma_error_handler(struct ata_port *ap)
thaw = true;
}
+ trace_ata_bmdma_stop(ap, &qc->tf, qc->tag);
ap->ops->bmdma_stop(qc);
/* if we're gonna thaw, make sure IRQ is clear */
@@ -2914,6 +2926,7 @@ void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc)
if (ata_is_dma(qc->tf.protocol)) {
spin_lock_irqsave(ap->lock, flags);
+ trace_ata_bmdma_stop(ap, &qc->tf, qc->tag);
ap->ops->bmdma_stop(qc);
spin_unlock_irqrestore(ap->lock, flags);
}
diff --git a/include/trace/events/libata.h b/include/trace/events/libata.h
index ec2a350d1aca..6a0a9b7a42ec 100644
--- a/include/trace/events/libata.h
+++ b/include/trace/events/libata.h
@@ -291,6 +291,106 @@ DEFINE_EVENT(ata_qc_complete_template, ata_qc_complete_done,
TP_PROTO(struct ata_queued_cmd *qc),
TP_ARGS(qc));
+TRACE_EVENT(ata_tf_load,
+
+ TP_PROTO(struct ata_port *ap, const struct ata_taskfile *tf),
+
+ TP_ARGS(ap, tf),
+
+ TP_STRUCT__entry(
+ __field( unsigned int, ata_port )
+ __field( unsigned char, cmd )
+ __field( unsigned char, dev )
+ __field( unsigned char, lbal )
+ __field( unsigned char, lbam )
+ __field( unsigned char, lbah )
+ __field( unsigned char, nsect )
+ __field( unsigned char, feature )
+ __field( unsigned char, hob_lbal )
+ __field( unsigned char, hob_lbam )
+ __field( unsigned char, hob_lbah )
+ __field( unsigned char, hob_nsect )
+ __field( unsigned char, hob_feature )
+ __field( unsigned char, proto )
+ ),
+
+ TP_fast_assign(
+ __entry->ata_port = ap->print_id;
+ __entry->proto = tf->protocol;
+ __entry->cmd = tf->command;
+ __entry->dev = tf->device;
+ __entry->lbal = tf->lbal;
+ __entry->lbam = tf->lbam;
+ __entry->lbah = tf->lbah;
+ __entry->hob_lbal = tf->hob_lbal;
+ __entry->hob_lbam = tf->hob_lbam;
+ __entry->hob_lbah = tf->hob_lbah;
+ __entry->feature = tf->feature;
+ __entry->hob_feature = tf->hob_feature;
+ __entry->nsect = tf->nsect;
+ __entry->hob_nsect = tf->hob_nsect;
+ ),
+
+ TP_printk("ata_port=%u proto=%s cmd=%s%s " \
+ " tf=(%02x/%02x:%02x:%02x:%02x:%02x/%02x:%02x:%02x:%02x:%02x/%02x)",
+ __entry->ata_port,
+ show_protocol_name(__entry->proto),
+ show_opcode_name(__entry->cmd),
+ __parse_subcmd(__entry->cmd, __entry->feature, __entry->hob_nsect),
+ __entry->cmd, __entry->feature, __entry->nsect,
+ __entry->lbal, __entry->lbam, __entry->lbah,
+ __entry->hob_feature, __entry->hob_nsect,
+ __entry->hob_lbal, __entry->hob_lbam, __entry->hob_lbah,
+ __entry->dev)
+);
+
+DECLARE_EVENT_CLASS(ata_exec_command_template,
+
+ TP_PROTO(struct ata_port *ap, const struct ata_taskfile *tf, unsigned int tag),
+
+ TP_ARGS(ap, tf, tag),
+
+ TP_STRUCT__entry(
+ __field( unsigned int, ata_port )
+ __field( unsigned int, tag )
+ __field( unsigned char, cmd )
+ __field( unsigned char, feature )
+ __field( unsigned char, hob_nsect )
+ __field( unsigned char, proto )
+ ),
+
+ TP_fast_assign(
+ __entry->ata_port = ap->print_id;
+ __entry->tag = tag;
+ __entry->proto = tf->protocol;
+ __entry->cmd = tf->command;
+ __entry->feature = tf->feature;
+ __entry->hob_nsect = tf->hob_nsect;
+ ),
+
+ TP_printk("ata_port=%u tag=%d proto=%s cmd=%s%s",
+ __entry->ata_port, __entry->tag,
+ show_protocol_name(__entry->proto),
+ show_opcode_name(__entry->cmd),
+ __parse_subcmd(__entry->cmd, __entry->feature, __entry->hob_nsect))
+);
+
+DEFINE_EVENT(ata_exec_command_template, ata_exec_command,
+ TP_PROTO(struct ata_port *ap, const struct ata_taskfile *tf, unsigned int tag),
+ TP_ARGS(ap, tf, tag));
+
+DEFINE_EVENT(ata_exec_command_template, ata_bmdma_setup,
+ TP_PROTO(struct ata_port *ap, const struct ata_taskfile *tf, unsigned int tag),
+ TP_ARGS(ap, tf, tag));
+
+DEFINE_EVENT(ata_exec_command_template, ata_bmdma_start,
+ TP_PROTO(struct ata_port *ap, const struct ata_taskfile *tf, unsigned int tag),
+ TP_ARGS(ap, tf, tag));
+
+DEFINE_EVENT(ata_exec_command_template, ata_bmdma_stop,
+ TP_PROTO(struct ata_port *ap, const struct ata_taskfile *tf, unsigned int tag),
+ TP_ARGS(ap, tf, tag));
+
TRACE_EVENT(ata_eh_link_autopsy,
TP_PROTO(struct ata_device *dev, unsigned int eh_action, unsigned int eh_err_mask),
--
2.29.2
