[PATCH v2] ufs: bsg: Add hibern8 enter/exit to ufshcd_send_bsg_uic_cmd

[PATCH v2] ufs: bsg: Add hibern8 enter/exit to ufshcd_send_bsg_uic_cmd

[Arthur Simchaev]

This patch adds functionality to allow user-level applications to send
the Hibern8 Enter command via the BSG framework. With this feature,
applications can perform H8 stress tests. Also can be used as one
of the triggers for the Eye monitor measurement feature added to the
M-PHY v5 specification.
For completion, allow the sibling functionality of hibern8 exit as well.

Signed-off-by: Arthur Simchaev <arthur.simchaev@sandisk.com>

---
Changed since v1:
 - elaborate commit log
---
 drivers/ufs/core/ufshcd.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index be65fc4b5ccd..536b54ccc860 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -4363,6 +4363,16 @@ int ufshcd_send_bsg_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
 		goto out;
 	}
 
+	if (uic_cmd->command == UIC_CMD_DME_HIBER_ENTER) {
+		ret = ufshcd_uic_hibern8_enter(hba);
+		goto out;
+	}
+
+	if (uic_cmd->command == UIC_CMD_DME_HIBER_EXIT) {
+		ret = ufshcd_uic_hibern8_exit(hba, uic_cmd);
+		goto out;
+	}
+
 	mutex_lock(&hba->uic_cmd_mutex);
 	ufshcd_add_delay_before_dme_cmd(hba);
 
-- 
2.49.0

Re: [PATCH v2] ufs: bsg: Add hibern8 enter/exit to ufshcd_send_bsg_uic_cmd

[Bart Van Assche]

On 4/14/25 5:02 AM, Arthur Simchaev wrote:
> This patch adds functionality to allow user-level applications to send
> the Hibern8 Enter command via the BSG framework. With this feature,
> applications can perform H8 stress tests. Also can be used as one
> of the triggers for the Eye monitor measurement feature added to the
> M-PHY v5 specification.
> For completion, allow the sibling functionality of hibern8 exit as well.
> 
> Signed-off-by: Arthur Simchaev <arthur.simchaev@sandisk.com>
> 
> ---
> Changed since v1:
>   - elaborate commit log
> ---
>   drivers/ufs/core/ufshcd.c | 10 ++++++++++
>   1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> index be65fc4b5ccd..536b54ccc860 100644
> --- a/drivers/ufs/core/ufshcd.c
> +++ b/drivers/ufs/core/ufshcd.c
> @@ -4363,6 +4363,16 @@ int ufshcd_send_bsg_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
>   		goto out;
>   	}
>   
> +	if (uic_cmd->command == UIC_CMD_DME_HIBER_ENTER) {
> +		ret = ufshcd_uic_hibern8_enter(hba);
> +		goto out;
> +	}
> +
> +	if (uic_cmd->command == UIC_CMD_DME_HIBER_EXIT) {
> +		ret = ufshcd_uic_hibern8_exit(hba, uic_cmd);
> +		goto out;
> +	}
> +
>   	mutex_lock(&hba->uic_cmd_mutex);
>   	ufshcd_add_delay_before_dme_cmd(hba);

This is wrong. The BSG interface shouldn't alter the power state without
informing the SCSI core about these power state changes. Please use
existing sysfs attributes to modify the power state or add new sysfs
attributes if necessary.

Bart.

RE: [PATCH v2] ufs: bsg: Add hibern8 enter/exit to ufshcd_send_bsg_uic_cmd

[Arthur Simchaev]

> This is wrong. The BSG interface shouldn't alter the power state without
> informing the SCSI core about these power state changes. Please use existing
> sysfs attributes to modify the power state or add new sysfs attributes if
> necessary.
> 
> Bart.

Thank you Bart, I will fix it

> -----Original Message-----
> From: Bart Van Assche <bvanassche@acm.org>
> Sent: Monday, April 14, 2025 7:16 PM
> To: Arthur Simchaev <Arthur.Simchaev@sandisk.com>
> Cc: Avri Altman <Avri.Altman@sandisk.com>; Avi Shchislowski
> <Avi.Shchislowski@sandisk.com>; beanhuo@micron.com; linux-
> scsi@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v2] ufs: bsg: Add hibern8 enter/exit to
> ufshcd_send_bsg_uic_cmd
> 
> On 4/14/25 5:02 AM, Arthur Simchaev wrote:
> > This patch adds functionality to allow user-level applications to send
> > the Hibern8 Enter command via the BSG framework. With this feature,
> > applications can perform H8 stress tests. Also can be used as one of
> > the triggers for the Eye monitor measurement feature added to the
> > M-PHY v5 specification.
> > For completion, allow the sibling functionality of hibern8 exit as well.
> >
> > Signed-off-by: Arthur Simchaev <arthur.simchaev@sandisk.com>
> >
> > ---
> > Changed since v1:
> >   - elaborate commit log
> > ---
> >   drivers/ufs/core/ufshcd.c | 10 ++++++++++
> >   1 file changed, 10 insertions(+)
> >
> > diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> > index be65fc4b5ccd..536b54ccc860 100644
> > --- a/drivers/ufs/core/ufshcd.c
> > +++ b/drivers/ufs/core/ufshcd.c
> > @@ -4363,6 +4363,16 @@ int ufshcd_send_bsg_uic_cmd(struct ufs_hba
> *hba, struct uic_command *uic_cmd)
> >   		goto out;
> >   	}
> >
> > +	if (uic_cmd->command == UIC_CMD_DME_HIBER_ENTER) {
> > +		ret = ufshcd_uic_hibern8_enter(hba);
> > +		goto out;
> > +	}
> > +
> > +	if (uic_cmd->command == UIC_CMD_DME_HIBER_EXIT) {
> > +		ret = ufshcd_uic_hibern8_exit(hba, uic_cmd);
> > +		goto out;
> > +	}
> > +
> >   	mutex_lock(&hba->uic_cmd_mutex);
> >   	ufshcd_add_delay_before_dme_cmd(hba);
> 

Re: [PATCH v2] ufs: bsg: Add hibern8 enter/exit to ufshcd_send_bsg_uic_cmd

[kernel test robot]

Hi Arthur,

kernel test robot noticed the following build errors:

[auto build test ERROR on jejb-scsi/for-next]
[also build test ERROR on mkp-scsi/for-next linus/master v6.15-rc2 next-20250415]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Arthur-Simchaev/ufs-bsg-Add-hibern8-enter-exit-to-ufshcd_send_bsg_uic_cmd/20250414-200404
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next
patch link:    https://lore.kernel.org/r/20250414120257.247858-1-arthur.simchaev%40sandisk.com
patch subject: [PATCH v2] ufs: bsg: Add hibern8 enter/exit to ufshcd_send_bsg_uic_cmd
config: i386-buildonly-randconfig-004-20250415 (https://download.01.org/0day-ci/archive/20250415/202504152109.JOmreWGE-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250415/202504152109.JOmreWGE-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202504152109.JOmreWGE-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/ufs/core/ufshcd.c:4360:38: error: too many arguments to function call, expected single argument 'hba', have 2 arguments
    4360 |                 ret = ufshcd_uic_hibern8_exit(hba, uic_cmd);
         |                       ~~~~~~~~~~~~~~~~~~~~~~~      ^~~~~~~
   include/ufs/ufshcd.h:1331:5: note: 'ufshcd_uic_hibern8_exit' declared here
    1331 | int ufshcd_uic_hibern8_exit(struct ufs_hba *hba);
         |     ^                       ~~~~~~~~~~~~~~~~~~~
   drivers/ufs/core/ufshcd.c:10342:44: warning: shift count >= width of type [-Wshift-count-overflow]
    10342 |                 if (!dma_set_mask_and_coherent(hba->dev, DMA_BIT_MASK(64)))
          |                                                          ^~~~~~~~~~~~~~~~
   include/linux/dma-mapping.h:73:54: note: expanded from macro 'DMA_BIT_MASK'
      73 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
         |                                                      ^ ~~~
   1 warning and 1 error generated.


vim +/hba +4360 drivers/ufs/core/ufshcd.c

  4331	
  4332	/**
  4333	 * ufshcd_send_bsg_uic_cmd - Send UIC commands requested via BSG layer and retrieve the result
  4334	 * @hba: per adapter instance
  4335	 * @uic_cmd: UIC command
  4336	 *
  4337	 * Return: 0 only if success.
  4338	 */
  4339	int ufshcd_send_bsg_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
  4340	{
  4341		int ret;
  4342	
  4343		if (hba->quirks & UFSHCD_QUIRK_BROKEN_UIC_CMD)
  4344			return 0;
  4345	
  4346		ufshcd_hold(hba);
  4347	
  4348		if (uic_cmd->argument1 == UIC_ARG_MIB(PA_PWRMODE) &&
  4349		    uic_cmd->command == UIC_CMD_DME_SET) {
  4350			ret = ufshcd_uic_pwr_ctrl(hba, uic_cmd);
  4351			goto out;
  4352		}
  4353	
  4354		if (uic_cmd->command == UIC_CMD_DME_HIBER_ENTER) {
  4355			ret = ufshcd_uic_hibern8_enter(hba);
  4356			goto out;
  4357		}
  4358	
  4359		if (uic_cmd->command == UIC_CMD_DME_HIBER_EXIT) {
> 4360			ret = ufshcd_uic_hibern8_exit(hba, uic_cmd);
  4361			goto out;
  4362		}
  4363	
  4364		mutex_lock(&hba->uic_cmd_mutex);
  4365		ufshcd_add_delay_before_dme_cmd(hba);
  4366	
  4367		ret = __ufshcd_send_uic_cmd(hba, uic_cmd);
  4368		if (!ret)
  4369			ret = ufshcd_wait_for_uic_cmd(hba, uic_cmd);
  4370	
  4371		mutex_unlock(&hba->uic_cmd_mutex);
  4372	
  4373	out:
  4374		ufshcd_release(hba);
  4375		return ret;
  4376	}
  4377	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH v2] ufs: bsg: Add hibern8 enter/exit to ufshcd_send_bsg_uic_cmd

[kernel test robot]

Hi Arthur,

kernel test robot noticed the following build errors:

[auto build test ERROR on jejb-scsi/for-next]
[also build test ERROR on mkp-scsi/for-next linus/master v6.15-rc2 next-20250415]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Arthur-Simchaev/ufs-bsg-Add-hibern8-enter-exit-to-ufshcd_send_bsg_uic_cmd/20250414-200404
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next
patch link:    https://lore.kernel.org/r/20250414120257.247858-1-arthur.simchaev%40sandisk.com
patch subject: [PATCH v2] ufs: bsg: Add hibern8 enter/exit to ufshcd_send_bsg_uic_cmd
config: s390-randconfig-002-20250415 (https://download.01.org/0day-ci/archive/20250415/202504152111.1Huykiqb-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250415/202504152111.1Huykiqb-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202504152111.1Huykiqb-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/ufs/core/ufshcd.c: In function 'ufshcd_send_bsg_uic_cmd':
>> drivers/ufs/core/ufshcd.c:4360:9: error: too many arguments to function 'ufshcd_uic_hibern8_exit'
      ret = ufshcd_uic_hibern8_exit(hba, uic_cmd);
            ^~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/ufs/core/ufshcd-priv.h:7:0,
                    from drivers/ufs/core/ufshcd.c:31:
   include/ufs/ufshcd.h:1331:5: note: declared here
    int ufshcd_uic_hibern8_exit(struct ufs_hba *hba);
        ^~~~~~~~~~~~~~~~~~~~~~~


vim +/ufshcd_uic_hibern8_exit +4360 drivers/ufs/core/ufshcd.c

  4331	
  4332	/**
  4333	 * ufshcd_send_bsg_uic_cmd - Send UIC commands requested via BSG layer and retrieve the result
  4334	 * @hba: per adapter instance
  4335	 * @uic_cmd: UIC command
  4336	 *
  4337	 * Return: 0 only if success.
  4338	 */
  4339	int ufshcd_send_bsg_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
  4340	{
  4341		int ret;
  4342	
  4343		if (hba->quirks & UFSHCD_QUIRK_BROKEN_UIC_CMD)
  4344			return 0;
  4345	
  4346		ufshcd_hold(hba);
  4347	
  4348		if (uic_cmd->argument1 == UIC_ARG_MIB(PA_PWRMODE) &&
  4349		    uic_cmd->command == UIC_CMD_DME_SET) {
  4350			ret = ufshcd_uic_pwr_ctrl(hba, uic_cmd);
  4351			goto out;
  4352		}
  4353	
  4354		if (uic_cmd->command == UIC_CMD_DME_HIBER_ENTER) {
  4355			ret = ufshcd_uic_hibern8_enter(hba);
  4356			goto out;
  4357		}
  4358	
  4359		if (uic_cmd->command == UIC_CMD_DME_HIBER_EXIT) {
> 4360			ret = ufshcd_uic_hibern8_exit(hba, uic_cmd);
  4361			goto out;
  4362		}
  4363	
  4364		mutex_lock(&hba->uic_cmd_mutex);
  4365		ufshcd_add_delay_before_dme_cmd(hba);
  4366	
  4367		ret = __ufshcd_send_uic_cmd(hba, uic_cmd);
  4368		if (!ret)
  4369			ret = ufshcd_wait_for_uic_cmd(hba, uic_cmd);
  4370	
  4371		mutex_unlock(&hba->uic_cmd_mutex);
  4372	
  4373	out:
  4374		ufshcd_release(hba);
  4375		return ret;
  4376	}
  4377	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki