[PATCH] scsi: ufs: Add checking lifetime attribute for WriteBooster

Linux SCSI subsystem development
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* [PATCH] scsi: ufs: Add checking lifetime attribute for WriteBooster
       [not found] <CGME20220126104125epcms2p50afb250190ffc3f2dc7b16df31757c94@epcms2p6>
@ 2022-01-26 11:25 ` Jinyoung CHOI
  2022-01-26 23:58   ` kernel test robot
  0 siblings, 1 reply; 2+ messages in thread
From: Jinyoung CHOI @ 2022-01-26 11:25 UTC (permalink / raw)
  To: ALIM AKHTAR, avri.altman@wdc.com, jejb@linux.ibm.com,
	martin.petersen@oracle.com, bvanassche@acm.org,
	beanhuo@micron.com, cang@codeaurora.org, adrian.hunter@intel.com,
	asutoshd@codeaurora.org, linux-scsi@vger.kernel.org,
	linux-kernel@vger.kernel.org

Because WB performs write in SLC mode, it is difficult to use WB
infinitely.

Vendors can set the Lifetime limit value to the device.
If Lifetime exceeds the limit value, the device itself can disable the
WB feature.

WB feature supports "bWriteBoosterBufferLifeTimeEst (IDN = 1E)" attribute.

With Lifetime exceeding the limit value,
the current driver continuously performs the following query.

	- Write Flag: WB_ENABLE / DISABLE
	- Read attr: Available Buffer Size
	- Read attr: Current Buffer Size

This patch recognizes that WriteBooster is no longer supported by the device,
and prevent unnecessary query issues.

Signed-off-by: Jinyoung Choi <j-young.choi@samsung.com>
---
 drivers/scsi/ufs/ufs.h    |  6 +++++
 drivers/scsi/ufs/ufshcd.c | 52 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)

diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index 0bfdca3e648e..4a00c24a3209 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -43,6 +43,12 @@
 /* WriteBooster buffer is available only for the logical unit from 0 to 7 */
 #define UFS_UPIU_MAX_WB_LUN_ID	8
 
+/*
+ * WriteBooster buffer lifetime has a limit setted by vendor.
+ * If it is over the limit, WriteBooster feature will be disabled.
+ */
+#define UFS_WB_EXCEED_LIFETIME		0x0B
+
 /* Well known logical unit id in LUN field of UPIU */
 enum {
 	UFS_UPIU_REPORT_LUNS_WLUN	= 0x81,
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 460d2b440d2e..6088af45633b 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5778,6 +5778,47 @@ static bool ufshcd_wb_presrv_usrspc_keep_vcc_on(struct ufs_hba *hba,
 	return false;
 }
 
+static void ufshcd_wb_force_disable(struct ufs_hba *hba)
+{
+	if (!(hba->quirks & UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL))
+		ufshcd_wb_toggle_flush(hba, false);
+
+	ufshcd_wb_toggle_flush_during_h8(hba, false);
+	ufshcd_wb_toggle(hba, false);
+	hba->caps &= ~UFSHCD_CAP_WB_EN;
+
+	dev_info(hba->dev, "%s: WB force disabled\n", __func__);
+}
+
+static bool ufshcd_is_wb_buf_lifetime_available(struct ufs_hba *hba)
+{
+	u32 lifetime;
+	int ret;
+	u8 index;
+
+	index = ufshcd_wb_get_query_index(hba);
+	ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
+				      QUERY_ATTR_IDN_WB_BUFF_LIFE_TIME_EST,
+				      index, 0, &lifetime);
+	if (ret) {
+		dev_err(hba->dev,
+			"%s: bWriteBoosterBufferLifeTimeEst read failed %d\n",
+			__func__, ret);
+		return false;
+	}
+
+	if (lifetime == UFS_WB_EXCEED_LIFETIME) {
+		dev_err(hba->dev, "%s: WB buf lifetime is exhausted 0x%0.2X\n",
+			__func__, lifetime);
+		return false;
+	}
+
+	dev_dbg(hba->dev, "%s: WB buf lifetime is 0x%0.2X\n",
+		__func__, lifetime);
+
+	return true;
+}
+
 static bool ufshcd_wb_need_flush(struct ufs_hba *hba)
 {
 	int ret;
@@ -5786,6 +5827,12 @@ static bool ufshcd_wb_need_flush(struct ufs_hba *hba)
 
 	if (!ufshcd_is_wb_allowed(hba))
 		return false;
+
+	if (!ufshcd_is_wb_buf_lifetime_available(hba)) {
+		ufshcd_wb_force_disable(hba);
+		return false;
+	}
+
 	/*
 	 * The ufs device needs the vcc to be ON to flush.
 	 * With user-space reduction enabled, it's enough to enable flush
@@ -7486,6 +7533,7 @@ static void ufshcd_wb_probe(struct ufs_hba *hba, u8 *desc_buf)
 
 	if (!ufshcd_is_wb_allowed(hba))
 		return;
+
 	/*
 	 * Probe WB only for UFS-2.2 and UFS-3.1 (and later) devices or
 	 * UFS devices with quirk UFS_DEVICE_QUIRK_SUPPORT_EXTENDED_FEATURES
@@ -7537,6 +7585,10 @@ static void ufshcd_wb_probe(struct ufs_hba *hba, u8 *desc_buf)
 		if (!d_lu_wb_buf_alloc)
 			goto wb_disabled;
 	}
+
+	if (!ufshcd_is_wb_buf_lifetime_available(hba))
+		goto wb_disabled;
+
 	return;
 
 wb_disabled:
-- 
2.25.1

^ permalink raw reply related	[flat|nested] 2+ messages in thread

* Re: [PATCH] scsi: ufs: Add checking lifetime attribute for WriteBooster
  2022-01-26 11:25 ` [PATCH] scsi: ufs: Add checking lifetime attribute for WriteBooster Jinyoung CHOI
@ 2022-01-26 23:58   ` kernel test robot
  0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2022-01-26 23:58 UTC (permalink / raw)
  To: Jinyoung CHOI, ALIM AKHTAR, avri.altman@wdc.com,
	jejb@linux.ibm.com, martin.petersen@oracle.com,
	bvanassche@acm.org, beanhuo@micron.com, cang@codeaurora.org,
	adrian.hunter@intel.com, asutoshd@codeaurora.org,
	linux-scsi@vger.kernel.org
  Cc: kbuild-all

Hi Jinyoung,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on mkp-scsi/for-next]
[also build test WARNING on jejb-scsi/for-next v5.17-rc1 next-20220125]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jinyoung-CHOI/scsi-ufs-Add-checking-lifetime-attribute-for-WriteBooster/20220127-064945
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git for-next
config: alpha-allmodconfig (https://download.01.org/0day-ci/archive/20220127/202201270725.pB39Qr9M-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/119120165af15780b5bdb5bf4bf59cfd8a2826ba
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jinyoung-CHOI/scsi-ufs-Add-checking-lifetime-attribute-for-WriteBooster/20220127-064945
        git checkout 119120165af15780b5bdb5bf4bf59cfd8a2826ba
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=alpha SHELL=/bin/bash drivers/scsi/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from include/linux/device.h:15,
                    from include/linux/async.h:14,
                    from drivers/scsi/ufs/ufshcd.c:12:
   drivers/scsi/ufs/ufshcd.c: In function 'ufshcd_is_wb_buf_lifetime_available':
>> drivers/scsi/ufs/ufshcd.c:5811:35: warning: '0' flag ignored with precision and '%X' gnu_printf format [-Wformat=]
    5811 |                 dev_err(hba->dev, "%s: WB buf lifetime is exhausted 0x%0.2X\n",
         |                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:110:30: note: in definition of macro 'dev_printk_index_wrap'
     110 |                 _p_func(dev, fmt, ##__VA_ARGS__);                       \
         |                              ^~~
   include/linux/dev_printk.h:144:56: note: in expansion of macro 'dev_fmt'
     144 |         dev_printk_index_wrap(_dev_err, KERN_ERR, dev, dev_fmt(fmt), ##__VA_ARGS__)
         |                                                        ^~~~~~~
   drivers/scsi/ufs/ufshcd.c:5811:17: note: in expansion of macro 'dev_err'
    5811 |                 dev_err(hba->dev, "%s: WB buf lifetime is exhausted 0x%0.2X\n",
         |                 ^~~~~~~
   In file included from include/linux/printk.h:555,
                    from include/asm-generic/bug.h:22,
                    from arch/alpha/include/asm/bug.h:23,
                    from include/linux/bug.h:5,
                    from include/linux/thread_info.h:13,
                    from include/asm-generic/current.h:5,
                    from ./arch/alpha/include/generated/asm/current.h:1,
                    from include/linux/sched.h:12,
                    from include/linux/ratelimit.h:6,
                    from include/linux/dev_printk.h:16,
                    from include/linux/device.h:15,
                    from include/linux/async.h:14,
                    from drivers/scsi/ufs/ufshcd.c:12:
   drivers/scsi/ufs/ufshcd.c:5816:27: warning: '0' flag ignored with precision and '%X' gnu_printf format [-Wformat=]
    5816 |         dev_dbg(hba->dev, "%s: WB buf lifetime is 0x%0.2X\n",
         |                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:134:29: note: in definition of macro '__dynamic_func_call'
     134 |                 func(&id, ##__VA_ARGS__);               \
         |                             ^~~~~~~~~~~
   include/linux/dynamic_debug.h:166:9: note: in expansion of macro '_dynamic_func_call'
     166 |         _dynamic_func_call(fmt,__dynamic_dev_dbg,               \
         |         ^~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:155:9: note: in expansion of macro 'dynamic_dev_dbg'
     155 |         dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~~~~~~~~~~
   include/linux/dev_printk.h:155:30: note: in expansion of macro 'dev_fmt'
     155 |         dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
         |                              ^~~~~~~
   drivers/scsi/ufs/ufshcd.c:5816:9: note: in expansion of macro 'dev_dbg'
    5816 |         dev_dbg(hba->dev, "%s: WB buf lifetime is 0x%0.2X\n",
         |         ^~~~~~~


vim +5811 drivers/scsi/ufs/ufshcd.c

  5792	
  5793	static bool ufshcd_is_wb_buf_lifetime_available(struct ufs_hba *hba)
  5794	{
  5795		u32 lifetime;
  5796		int ret;
  5797		u8 index;
  5798	
  5799		index = ufshcd_wb_get_query_index(hba);
  5800		ret = ufshcd_query_attr_retry(hba, UPIU_QUERY_OPCODE_READ_ATTR,
  5801					      QUERY_ATTR_IDN_WB_BUFF_LIFE_TIME_EST,
  5802					      index, 0, &lifetime);
  5803		if (ret) {
  5804			dev_err(hba->dev,
  5805				"%s: bWriteBoosterBufferLifeTimeEst read failed %d\n",
  5806				__func__, ret);
  5807			return false;
  5808		}
  5809	
  5810		if (lifetime == UFS_WB_EXCEED_LIFETIME) {
> 5811			dev_err(hba->dev, "%s: WB buf lifetime is exhausted 0x%0.2X\n",
  5812				__func__, lifetime);
  5813			return false;
  5814		}
  5815	
  5816		dev_dbg(hba->dev, "%s: WB buf lifetime is 0x%0.2X\n",
  5817			__func__, lifetime);
  5818	
  5819		return true;
  5820	}
  5821	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2022-01-26 11:25 ` [PATCH] scsi: ufs: Add checking lifetime attribute for WriteBooster Jinyoung CHOI
2022-01-26 23:58   ` kernel test robot

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