[PATCH] scsi: pm80xx: Use module param to set pcs event log severity

[PATCH] scsi: pm80xx: Use module param to set pcs event log severity

[Salomon Dushimirimana]

The pm8006 driver sets pcs event log threshold very high which causes
most of the FW logs to not be captured. This adds a module parameter to
configure pcs event log severity with 3 (medium severity) as the
default.

Signed-off-by: Bhavesh Jashnani <bjashnani@google.com>
Signed-off-by: Salomon Dushimirimana <salomondush@google.com>
---
 drivers/scsi/pm8001/pm8001_init.c | 4 ++++
 drivers/scsi/pm8001/pm8001_sas.h  | 2 ++
 drivers/scsi/pm8001/pm80xx_hwi.c  | 3 ++-
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c
index 1e63cb6cd8e3..355aab0c982a 100644
--- a/drivers/scsi/pm8001/pm8001_init.c
+++ b/drivers/scsi/pm8001/pm8001_init.c
@@ -68,6 +68,10 @@ static bool pm8001_read_wwn = true;
 module_param_named(read_wwn, pm8001_read_wwn, bool, 0444);
 MODULE_PARM_DESC(zoned, "Get WWN from the controller. Default: true");
 
+uint pcs_event_log_severity = 0x03;
+module_param(pcs_event_log_severity, int, 0644);
+MODULE_PARM_DESC(pcs_event_log_severity, "PCS event log severity level");
+
 static struct scsi_transport_template *pm8001_stt;
 static int pm8001_init_ccb_tag(struct pm8001_hba_info *);
 
diff --git a/drivers/scsi/pm8001/pm8001_sas.h b/drivers/scsi/pm8001/pm8001_sas.h
index ced6721380a8..42c7b3f7afbf 100644
--- a/drivers/scsi/pm8001/pm8001_sas.h
+++ b/drivers/scsi/pm8001/pm8001_sas.h
@@ -96,6 +96,8 @@ extern struct list_head hba_list;
 extern const struct pm8001_dispatch pm8001_8001_dispatch;
 extern const struct pm8001_dispatch pm8001_80xx_dispatch;
 
+extern uint pcs_event_log_severity;
+
 struct pm8001_hba_info;
 struct pm8001_ccb_info;
 struct pm8001_device;
diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
index 8fe886dc5e47..9b237a764d0b 100644
--- a/drivers/scsi/pm8001/pm80xx_hwi.c
+++ b/drivers/scsi/pm8001/pm80xx_hwi.c
@@ -763,7 +763,8 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
 		pm8001_ha->memoryMap.region[IOP].phys_addr_lo;
 	pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_size		=
 							PM8001_EVENT_LOG_SIZE;
-	pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_severity	= 0x01;
+	pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_severity	=
+		pcs_event_log_severity;
 	pm8001_ha->main_cfg_tbl.pm80xx_tbl.fatal_err_interrupt		= 0x01;
 
 	/* Enable higher IQs and OQs, 32 to 63, bit 16 */
-- 
2.47.0.rc1.288.g06298d1525-goog

Re: [PATCH] scsi: pm80xx: Use module param to set pcs event log severity

[Jinpu Wang]

Hi,

On Thu, Oct 17, 2024 at 12:10 AM Salomon Dushimirimana
<salomondush@google.com> wrote:
>
> The pm8006 driver sets pcs event log threshold very high which causes
> most of the FW logs to not be captured. This adds a module parameter to
> configure pcs event log severity with 3 (medium severity) as the
> default.
upstream does not like more module parameters, can we just change the
default to 3, any harm?

Thx!
>
> Signed-off-by: Bhavesh Jashnani <bjashnani@google.com>
> Signed-off-by: Salomon Dushimirimana <salomondush@google.com>
> ---
>  drivers/scsi/pm8001/pm8001_init.c | 4 ++++
>  drivers/scsi/pm8001/pm8001_sas.h  | 2 ++
>  drivers/scsi/pm8001/pm80xx_hwi.c  | 3 ++-
>  3 files changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c
> index 1e63cb6cd8e3..355aab0c982a 100644
> --- a/drivers/scsi/pm8001/pm8001_init.c
> +++ b/drivers/scsi/pm8001/pm8001_init.c
> @@ -68,6 +68,10 @@ static bool pm8001_read_wwn = true;
>  module_param_named(read_wwn, pm8001_read_wwn, bool, 0444);
>  MODULE_PARM_DESC(zoned, "Get WWN from the controller. Default: true");
>
> +uint pcs_event_log_severity = 0x03;
> +module_param(pcs_event_log_severity, int, 0644);
> +MODULE_PARM_DESC(pcs_event_log_severity, "PCS event log severity level");
> +
>  static struct scsi_transport_template *pm8001_stt;
>  static int pm8001_init_ccb_tag(struct pm8001_hba_info *);
>
> diff --git a/drivers/scsi/pm8001/pm8001_sas.h b/drivers/scsi/pm8001/pm8001_sas.h
> index ced6721380a8..42c7b3f7afbf 100644
> --- a/drivers/scsi/pm8001/pm8001_sas.h
> +++ b/drivers/scsi/pm8001/pm8001_sas.h
> @@ -96,6 +96,8 @@ extern struct list_head hba_list;
>  extern const struct pm8001_dispatch pm8001_8001_dispatch;
>  extern const struct pm8001_dispatch pm8001_80xx_dispatch;
>
> +extern uint pcs_event_log_severity;
> +
>  struct pm8001_hba_info;
>  struct pm8001_ccb_info;
>  struct pm8001_device;
> diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
> index 8fe886dc5e47..9b237a764d0b 100644
> --- a/drivers/scsi/pm8001/pm80xx_hwi.c
> +++ b/drivers/scsi/pm8001/pm80xx_hwi.c
> @@ -763,7 +763,8 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
>                 pm8001_ha->memoryMap.region[IOP].phys_addr_lo;
>         pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_size           =
>                                                         PM8001_EVENT_LOG_SIZE;
> -       pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_severity       = 0x01;
> +       pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_severity       =
> +               pcs_event_log_severity;
>         pm8001_ha->main_cfg_tbl.pm80xx_tbl.fatal_err_interrupt          = 0x01;
>
>         /* Enable higher IQs and OQs, 32 to 63, bit 16 */
> --
> 2.47.0.rc1.288.g06298d1525-goog
>

Re: [PATCH] scsi: pm80xx: Use module param to set pcs event log severity

[Salomon Dushimirimana]

Hi,

3 works well for Google, but a different value might be better for
others. Having a module parameter would allow users to customize the
level of logging based on their specific needs. If that is not a
concern, I can change the default to just 3.

Thank you!

Salomon Dushimirimana


On Thu, Oct 17, 2024 at 2:45 AM Jinpu Wang <jinpu.wang@ionos.com> wrote:
>
> Hi,
>
> On Thu, Oct 17, 2024 at 12:10 AM Salomon Dushimirimana
> <salomondush@google.com> wrote:
> >
> > The pm8006 driver sets pcs event log threshold very high which causes
> > most of the FW logs to not be captured. This adds a module parameter to
> > configure pcs event log severity with 3 (medium severity) as the
> > default.
> upstream does not like more module parameters, can we just change the
> default to 3, any harm?
>
> Thx!
> >
> > Signed-off-by: Bhavesh Jashnani <bjashnani@google.com>
> > Signed-off-by: Salomon Dushimirimana <salomondush@google.com>
> > ---
> >  drivers/scsi/pm8001/pm8001_init.c | 4 ++++
> >  drivers/scsi/pm8001/pm8001_sas.h  | 2 ++
> >  drivers/scsi/pm8001/pm80xx_hwi.c  | 3 ++-
> >  3 files changed, 8 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c
> > index 1e63cb6cd8e3..355aab0c982a 100644
> > --- a/drivers/scsi/pm8001/pm8001_init.c
> > +++ b/drivers/scsi/pm8001/pm8001_init.c
> > @@ -68,6 +68,10 @@ static bool pm8001_read_wwn = true;
> >  module_param_named(read_wwn, pm8001_read_wwn, bool, 0444);
> >  MODULE_PARM_DESC(zoned, "Get WWN from the controller. Default: true");
> >
> > +uint pcs_event_log_severity = 0x03;
> > +module_param(pcs_event_log_severity, int, 0644);
> > +MODULE_PARM_DESC(pcs_event_log_severity, "PCS event log severity level");
> > +
> >  static struct scsi_transport_template *pm8001_stt;
> >  static int pm8001_init_ccb_tag(struct pm8001_hba_info *);
> >
> > diff --git a/drivers/scsi/pm8001/pm8001_sas.h b/drivers/scsi/pm8001/pm8001_sas.h
> > index ced6721380a8..42c7b3f7afbf 100644
> > --- a/drivers/scsi/pm8001/pm8001_sas.h
> > +++ b/drivers/scsi/pm8001/pm8001_sas.h
> > @@ -96,6 +96,8 @@ extern struct list_head hba_list;
> >  extern const struct pm8001_dispatch pm8001_8001_dispatch;
> >  extern const struct pm8001_dispatch pm8001_80xx_dispatch;
> >
> > +extern uint pcs_event_log_severity;
> > +
> >  struct pm8001_hba_info;
> >  struct pm8001_ccb_info;
> >  struct pm8001_device;
> > diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
> > index 8fe886dc5e47..9b237a764d0b 100644
> > --- a/drivers/scsi/pm8001/pm80xx_hwi.c
> > +++ b/drivers/scsi/pm8001/pm80xx_hwi.c
> > @@ -763,7 +763,8 @@ static void init_default_table_values(struct pm8001_hba_info *pm8001_ha)
> >                 pm8001_ha->memoryMap.region[IOP].phys_addr_lo;
> >         pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_size           =
> >                                                         PM8001_EVENT_LOG_SIZE;
> > -       pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_severity       = 0x01;
> > +       pm8001_ha->main_cfg_tbl.pm80xx_tbl.pcs_event_log_severity       =
> > +               pcs_event_log_severity;
> >         pm8001_ha->main_cfg_tbl.pm80xx_tbl.fatal_err_interrupt          = 0x01;
> >
> >         /* Enable higher IQs and OQs, 32 to 63, bit 16 */
> > --
> > 2.47.0.rc1.288.g06298d1525-goog
> >

Re: [PATCH] scsi: pm80xx: Use module param to set pcs event log severity

[Martin K. Petersen]

Salomon,

> 3 works well for Google, but a different value might be better for
> others. Having a module parameter would allow users to customize the
> level of logging based on their specific needs. If that is not a
> concern, I can change the default to just 3.

How verbose will a value of 3 be during normal operation? I don't object
to capturing more information during failure scenarios as long as we're
not flooding the logs with noise when things are nominal.

-- 
Martin K. Petersen	Oracle Linux Engineering

Re: [PATCH] scsi: pm80xx: Use module param to set pcs event log severity

[Salomon Dushimirimana]

Hi,

These are the log levels and their descriptions for the pm80xx controllers -
0 - Disable logging
1 - Critical error
2 - Warning
3 - Notice
4 - Information
5 - Debugging
6 - Reserved

Loglevel 3 helps capture messages of severity level 3 and above. It is
not expected to be verbose and helps avoid the log overflow problem.

For debugging, there may be a need to change the loglevel, hence
making it configurable.

Thanks,
Salomon Dushimirimana

Salomon Dushimirimana


On Fri, Oct 25, 2024 at 11:45 AM Martin K. Petersen
<martin.petersen@oracle.com> wrote:
>
>
> Salomon,
>
> > 3 works well for Google, but a different value might be better for
> > others. Having a module parameter would allow users to customize the
> > level of logging based on their specific needs. If that is not a
> > concern, I can change the default to just 3.
>
> How verbose will a value of 3 be during normal operation? I don't object
> to capturing more information during failure scenarios as long as we're
> not flooding the logs with noise when things are nominal.
>
> --
> Martin K. Petersen      Oracle Linux Engineering

Re: [PATCH] scsi: pm80xx: Use module param to set pcs event log severity

[Martin K. Petersen]

Salomon,

> The pm8006 driver sets pcs event log threshold very high which causes
> most of the FW logs to not be captured. This adds a module parameter
> to configure pcs event log severity with 3 (medium severity) as the
> default.

Applied to 6.13/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering

Re: [PATCH] scsi: pm80xx: Use module param to set pcs event log severity

[Martin K. Petersen]

On Wed, 16 Oct 2024 22:09:44 +0000, Salomon Dushimirimana wrote:

> The pm8006 driver sets pcs event log threshold very high which causes
> most of the FW logs to not be captured. This adds a module parameter to
> configure pcs event log severity with 3 (medium severity) as the
> default.
> 
> 

Applied to 6.13/scsi-queue, thanks!

[1/1] scsi: pm80xx: Use module param to set pcs event log severity
      https://git.kernel.org/mkp/scsi/c/c8d81a438544

-- 
Martin K. Petersen	Oracle Linux Engineering