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Subject[PATCH v1 4/4] mmc: core: Add trace event for CSD response
Date
Example:
mmc_csd: mmc0: struct: 0, cmdclass: 0x5b5, raw: {0x400e0032,0x5b590000,0x3b4b7f80,0xa404000}

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
---

drivers/mmc/core/mmc.c | 4 ++++
drivers/mmc/core/sd.c | 2 ++
include/trace/events/mmc.h | 28 ++++++++++++++++++++++++++++
3 files changed, 34 insertions(+)

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 3e786ba204c3..46ce894f7c03 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -20,6 +20,8 @@
#include <linux/mmc/card.h>
#include <linux/mmc/mmc.h>

+#include <trace/events/mmc.h>
+
#include "core.h"
#include "card.h"
#include "host.h"
@@ -182,6 +184,8 @@ static int mmc_decode_csd(struct mmc_card *card)
csd->erase_size <<= csd->write_blkbits - 9;
}

+ trace_mmc_csd(card);
+
return 0;
}

diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index cc33a4f96c6a..4e704a7280ba 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -183,6 +183,8 @@ static int mmc_decode_csd(struct mmc_card *card)

card->erase_size = csd->erase_size;

+ trace_mmc_csd(card);
+
return 0;
}

diff --git a/include/trace/events/mmc.h b/include/trace/events/mmc.h
index fa82c010ae4e..58f6f7808974 100644
--- a/include/trace/events/mmc.h
+++ b/include/trace/events/mmc.h
@@ -174,6 +174,34 @@ TRACE_EVENT(sd_ssr,
)
);

+TRACE_EVENT(mmc_csd,
+
+ TP_PROTO(struct mmc_card *card),
+
+ TP_ARGS(card),
+
+ TP_STRUCT__entry(
+ __array(u32, raw, 4)
+ __field(unsigned char, structure)
+ __field(unsigned short, cmdclass)
+ __string(name, mmc_hostname(card->host))
+ ),
+
+ TP_fast_assign(
+ __entry->structure = card->csd.structure;
+ __entry->cmdclass = card->csd.cmdclass;
+ memcpy(__entry->raw, card->raw_csd, sizeof(card->raw_csd));
+ __assign_str(name, mmc_hostname(card->host));
+ ),
+
+ TP_printk("%s: struct: %d, cmdclass: %#x, raw: %s",
+ __get_str(name),
+ __entry->structure,
+ __entry->cmdclass,
+ __print_array(__entry->raw, 4, sizeof(u32))
+ )
+);
+
TRACE_EVENT(mmc_request_start,

TP_PROTO(struct mmc_host *host, struct mmc_request *mrq),
--
2.21.0.392.gf8f6787159e-goog
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