From: Jaegeuk Kim <jaegeuk@kernel.org>
To: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Bart Van Assche <bvanassche@acm.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Asutosh Das <asutoshd@codeaurora.org>,
Avri Altman <avri.altman@wdc.com>, Bean Huo <beanhuo@micron.com>,
Stanley Chu <stanley.chu@mediatek.com>,
Can Guo <cang@codeaurora.org>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Subject: [PATCH] scsi: ufs: add a quirk to disable FUA support
Date: Tue, 31 May 2022 13:10:53 -0700 [thread overview]
Message-ID: <20220531201053.3300018-1-jaegeuk@kernel.org> (raw)
UFS stack shows very low performance of FUA comparing to write and cache_flush.
Let's add a quirk to adjust it.
E.g., average latency according to the chunk size of write
Write(us/KB) 4 64 256 1024 2048
FUA 873.792 754.604 995.624 1011.67 1067.99
CACHE_FLUSH 824.703 712.98 800.307 1019.5 1037.37
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
drivers/scsi/ufs/ufshcd.c | 3 +++
drivers/scsi/ufs/ufshcd.h | 5 +++++
2 files changed, 8 insertions(+)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 3f9caafa91bf..811f3467879c 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5035,6 +5035,9 @@ static int ufshcd_slave_configure(struct scsi_device *sdev)
*/
sdev->silence_suspend = 1;
+ if (hba->quirks & UFSHCD_QUIRK_BROKEN_FUA)
+ sdev->broken_fua = 1;
+
ufshcd_crypto_register(hba, q);
return 0;
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 94f545be183a..6c480c6741d6 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -602,6 +602,11 @@ enum ufshcd_quirks {
* support physical host configuration.
*/
UFSHCD_QUIRK_SKIP_PH_CONFIGURATION = 1 << 16,
+
+ /*
+ * This quirk disables FUA support.
+ */
+ UFSHCD_QUIRK_BROKEN_FUA = 1 << 17,
};
enum ufshcd_caps {
--
2.36.1.255.ge46751e96f-goog
next reply other threads:[~2022-05-31 20:11 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-31 20:10 Jaegeuk Kim [this message]
2022-05-31 20:34 ` [PATCH] scsi: ufs: add a quirk to disable FUA support Eric Biggers
2022-05-31 20:53 ` Jaegeuk Kim
2022-05-31 21:25 ` Eric Biggers
2022-06-07 16:45 ` Asutosh Das
2022-06-01 5:24 ` Adrian Hunter
2022-06-01 11:59 ` Bart Van Assche
2022-06-01 17:06 ` Jaegeuk Kim
2022-06-01 17:05 ` Jaegeuk Kim
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220531201053.3300018-1-jaegeuk@kernel.org \
--to=jaegeuk@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=asutoshd@codeaurora.org \
--cc=avri.altman@wdc.com \
--cc=beanhuo@micron.com \
--cc=bvanassche@acm.org \
--cc=cang@codeaurora.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=martin.petersen@oracle.com \
--cc=stanley.chu@mediatek.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).