[PATCH 25/46] libata-sff: add tracepoints for HSM state machine

Hannes Reinecke
2020-02-04T16:56:13Z

Add tracepoints for the HSM state machine and remove DPRINTK() calls.

Signed-off-by: Hannes Reinecke <hare@suse.com>
---
drivers/ata/libata-sff.c | 12 +++---
drivers/ata/libata-trace.c | 29 +++++++++++++
include/trace/events/libata.h | 95 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 129 insertions(+), 7 deletions(-)

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index a5e6be6955ae..6b961eadc201 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -660,7 +660,7 @@ static void ata_pio_sector(struct ata_queued_cmd *qc)
page = nth_page(page, (offset >> PAGE_SHIFT));
offset %= PAGE_SIZE;

- DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
+ trace_ata_sff_pio_transfer_data(qc, offset, qc->sect_size);

/* do the actual data transfer */
buf = kmap_atomic(page);
@@ -723,7 +723,7 @@ static void ata_pio_sectors(struct ata_queued_cmd *qc)
static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
{
/* send SCSI cdb */
- DPRINTK("send cdb\n");
+ trace_atapi_send_cdb(qc, 0, qc->dev->cdb_len);
WARN_ON_ONCE(qc->dev->cdb_len < 12);

ap->ops->sff_data_xfer(qc, qc->cdb, qc->dev->cdb_len, 1);
@@ -794,7 +794,7 @@ static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes)
/* don't cross page boundaries */
count = min(count, (unsigned int)PAGE_SIZE - offset);

- DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
+ trace_atapi_pio_transfer_data(qc, offset, count);

/* do the actual data transfer */
buf = kmap_atomic(page);
@@ -976,8 +976,7 @@ int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
WARN_ON_ONCE(in_wq != ata_hsm_ok_in_wq(ap, qc));

fsm_start:
- DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
- ap->print_id, qc->tf.protocol, ap->hsm_task_state, status);
+ trace_ata_sff_hsm_state(qc, status);

switch (ap->hsm_task_state) {
case HSM_ST_FIRST:
@@ -1178,8 +1177,7 @@ int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
}

/* no more data to transfer */
- DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n",
- ap->print_id, qc->dev->devno, status);
+ trace_ata_sff_hsm_command_complete(qc, status);

WARN_ON_ONCE(qc->err_mask & (AC_ERR_DEV | AC_ERR_HSM));

diff --git a/drivers/ata/libata-trace.c b/drivers/ata/libata-trace.c
index 08e001303a82..5a9fba18411b 100644
--- a/drivers/ata/libata-trace.c
+++ b/drivers/ata/libata-trace.c
@@ -137,6 +137,35 @@ libata_trace_parse_qc_flags(struct trace_seq *p, unsigned int qc_flags)
return ret;
}

+const char *
+libata_trace_parse_tf_flags(struct trace_seq *p, unsigned int tf_flags)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ trace_seq_printf(p, "%x", tf_flags);
+ if (tf_flags) {
+ trace_seq_printf(p, "{ ");
+ if (tf_flags & ATA_TFLAG_LBA48)
+ trace_seq_printf(p, "LBA48 ");
+ if (tf_flags & ATA_TFLAG_ISADDR)
+ trace_seq_printf(p, "ISADDR ");
+ if (tf_flags & ATA_TFLAG_DEVICE)
+ trace_seq_printf(p, "DEV ");
+ if (tf_flags & ATA_TFLAG_WRITE)
+ trace_seq_printf(p, "WRITE ");
+ if (tf_flags & ATA_TFLAG_LBA)
+ trace_seq_printf(p, "LBA ");
+ if (tf_flags & ATA_TFLAG_FUA)
+ trace_seq_printf(p, "FUA ");
+ if (tf_flags & ATA_TFLAG_POLLING)
+ trace_seq_printf(p, "POLL ");
+ trace_seq_putc(p, '}');
+ }
+ trace_seq_putc(p, 0);
+
+ return ret;
+}
+
const char *
libata_trace_parse_subcmd(struct trace_seq *p, unsigned char cmd,
unsigned char feature, unsigned char hob_nsect)
diff --git a/include/trace/events/libata.h b/include/trace/events/libata.h
index 476acf823928..acfc5d739b17 100644
--- a/include/trace/events/libata.h
+++ b/include/trace/events/libata.h
@@ -148,6 +148,15 @@
ata_class_name(ATA_DEV_ZAC_UNSUP), \
ata_class_name(ATA_DEV_NONE))

+#define ata_sff_hsm_state_name(state) { state, #state }
+#define show_sff_hsm_state_name(val) \
+ __print_symbolic(val, \
+ ata_sff_hsm_state_name(HSM_ST_IDLE), \
+ ata_sff_hsm_state_name(HSM_ST_FIRST), \
+ ata_sff_hsm_state_name(HSM_ST), \
+ ata_sff_hsm_state_name(HSM_ST_LAST), \
+ ata_sff_hsm_state_name(HSM_ST_ERR))
+
const char *libata_trace_parse_status(struct trace_seq*, unsigned char);
#define __parse_status(s) libata_trace_parse_status(p, s)

@@ -160,6 +169,9 @@ const char *libata_trace_parse_eh_err_mask(struct trace_seq *, unsigned int);
const char *libata_trace_parse_qc_flags(struct trace_seq *, unsigned int);
#define __parse_qc_flags(f) libata_trace_parse_qc_flags(p, f)

+const char *libata_trace_parse_tf_flags(struct trace_seq *, unsigned int);
+#define __parse_tf_flags(f) libata_trace_parse_tf_flags(p, f)
+
const char *libata_trace_parse_subcmd(struct trace_seq *, unsigned char,
unsigned char, unsigned char);
#define __parse_subcmd(c,f,h) libata_trace_parse_subcmd(p, c, f, h)
@@ -514,6 +526,89 @@ DEFINE_EVENT(ata_link_reset_end_template, ata_link_softreset_end,
TP_PROTO(struct ata_link *link, unsigned int *class, int rc),
TP_ARGS(link, class, rc));

+DECLARE_EVENT_CLASS(ata_sff_hsm_template,
+
+ TP_PROTO(struct ata_queued_cmd *qc, unsigned char status),
+
+ TP_ARGS(qc, status),
+
+ TP_STRUCT__entry(
+ __field( unsigned int, ata_port )
+ __field( unsigned int, ata_dev )
+ __field( unsigned int, tag )
+ __field( unsigned int, qc_flags )
+ __field( unsigned int, protocol )
+ __field( unsigned int, hsm_state )
+ __field( unsigned char, dev_state )
+ ),
+
+ TP_fast_assign(
+ __entry->ata_port = qc->ap->print_id;
+ __entry->ata_dev = qc->dev->link->pmp + qc->dev->devno;
+ __entry->tag = qc->tag;
+ __entry->qc_flags = qc->flags;
+ __entry->protocol = qc->tf.protocol;
+ __entry->hsm_state = qc->ap->hsm_task_state;
+ __entry->dev_state = status;
+ ),
+
+ TP_printk("ata_port=%u ata_dev=%u tag=%d protocol=%d flags=%s task_state=%s dev_stat=0x%X",
+ __entry->ata_port, __entry->ata_dev, __entry->tag,
+ __entry->protocol,__parse_qc_flags(__entry->qc_flags),
+ show_sff_hsm_state_name(__entry->hsm_state),
+ __entry->dev_state)
+);
+
+DEFINE_EVENT(ata_sff_hsm_template, ata_sff_hsm_state,
+ TP_PROTO(struct ata_queued_cmd *qc, unsigned char state),
+ TP_ARGS(qc, state));
+
+DEFINE_EVENT(ata_sff_hsm_template, ata_sff_hsm_command_complete,
+ TP_PROTO(struct ata_queued_cmd *qc, unsigned char state),
+ TP_ARGS(qc, state));
+
+DECLARE_EVENT_CLASS(ata_transfer_data_template,
+
+ TP_PROTO(struct ata_queued_cmd *qc, unsigned int offset, unsigned int count),
+
+ TP_ARGS(qc, offset, count),
+
+ TP_STRUCT__entry(
+ __field( unsigned int, ata_port )
+ __field( unsigned int, ata_dev )
+ __field( unsigned int, tag )
+ __field( unsigned int, flags )
+ __field( unsigned int, offset )
+ __field( unsigned int, bytes )
+ ),
+
+ TP_fast_assign(
+ __entry->ata_port = qc->ap->print_id;
+ __entry->ata_dev = qc->dev->link->pmp + qc->dev->devno;
+ __entry->tag = qc->tag;
+ __entry->flags = qc->tf.flags;
+ __entry->offset = offset;
+ __entry->bytes = count;
+ ),
+
+ TP_printk("ata_port=%u ata_dev=%u tag=%d flags=%s offset=%u bytes=%u",
+ __entry->ata_port, __entry->ata_dev, __entry->tag,
+ __parse_tf_flags(__entry->flags),
+ __entry->offset, __entry->bytes)
+);
+
+DEFINE_EVENT(ata_transfer_data_template, ata_sff_pio_transfer_data,
+ TP_PROTO(struct ata_queued_cmd *qc, unsigned int offset, unsigned int count),
+ TP_ARGS(qc, offset, count));
+
+DEFINE_EVENT(ata_transfer_data_template, atapi_pio_transfer_data,
+ TP_PROTO(struct ata_queued_cmd *qc, unsigned int offset, unsigned int count),
+ TP_ARGS(qc, offset, count));
+
+DEFINE_EVENT(ata_transfer_data_template, atapi_send_cdb,
+ TP_PROTO(struct ata_queued_cmd *qc, unsigned int offset, unsigned int count),
+ TP_ARGS(qc, offset, count));
+
#endif /* _TRACE_LIBATA_H */

/* This part must be outside protection */
--
2.16.4