Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1662633

Re: [PATCH 3/3] libnvdimm: New ACPI 6.2 DSM functions

Show all headers | View raw

On Thu, Jun 08, 2017 at 10:28:51PM -0700, Dan Williams wrote:
> On Thu, Jun 8, 2017 at 1:02 AM, Johannes Thumshirn <jthumshirn@suse.de> wrote:
> > On 06/07/2017 07:04 PM, Jerry Hoemann wrote:
> >> @@ -179,6 +217,10 @@ static inline const char *nvdimm_bus_cmd_name(unsigned cmd)
> >>               [ND_CMD_ARS_START] = "ars_start",
> >>               [ND_CMD_ARS_STATUS] = "ars_status",
> >>               [ND_CMD_CLEAR_ERROR] = "clear_error",
> >> +             [5] = "trans_spa",
> >> +             [7] = "ars_err_inj",
> >> +             [8] = "ars_err_inj_clr",
> >> +             [9] = "ars_err_inj_stat",
> >>               [ND_CMD_CALL] = "cmd_call",
> >>       };
> >
> > Can you please add the new values to the enum in uapi/ndctl.h? I don't
> > really like the magic numbers here.
> 
> I think the reason Jerry didn't add them is due to symmetry. All the
> current ND_CMD_ definitions have corresponding ND_IOCTL_ definitions.
> These new commands we're only adding function number support and using
> ND_CMD_CALL for the ioctl transport.

  Yes, this is correct.

> 					We can still add definitions for
> them, but perhaps with an ACPI_NFIT_DSM_ prefix? The only consumer in
> the kernel of this is debug output code. I think perhaps we should
> just delete them here and either print raw numbers or enable
> acpi_nfit_ctl() to the decode and not rely on nvdimm_bus_cmd_name()
> which is meant to represent NVDIMM bus type generic command numbers.

This also comes into play when doing:

	cat /sys/class/nd/ndctl0/device/nd/ndctl0/device/commands

Without change here the new functions would show up as "unknown unknown unknown unknown."

Dan, are you suggesting I change the above to:

               [ND_CMD_CLEAR_ERROR] = "clear_error",
 +             [5] = "5",
 +             [7] = "7",
 +             [8] = "8",
 +             [9] = "9",
               [ND_CMD_CALL] = "cmd_call",

Note, "6" is currently reserved by ACPI.  I could add that also.



-- 

-----------------------------------------------------------------------------
Jerry Hoemann                  Software Engineer   Hewlett Packard Enterprise
-----------------------------------------------------------------------------

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH 0/3] Enable DSM pass thru for root functions Jerry Hoemann <jerry.hoemann@hpe.com> - 2017-06-07 19:10 +0200
  [PATCH 1/3] libnvdimm: passthru functions clear to send Jerry Hoemann <jerry.hoemann@hpe.com> - 2017-06-07 19:10 +0200
  [PATCH 3/3] libnvdimm: New ACPI 6.2 DSM functions Jerry Hoemann <jerry.hoemann@hpe.com> - 2017-06-07 19:10 +0200
    Re: [PATCH 3/3] libnvdimm: New ACPI 6.2 DSM functions Johannes Thumshirn <jthumshirn@suse.de> - 2017-06-08 10:10 +0200
      Re: [PATCH 3/3] libnvdimm: New ACPI 6.2 DSM functions Dan Williams <dan.j.williams@intel.com> - 2017-06-09 07:30 +0200
        Re: [PATCH 3/3] libnvdimm: New ACPI 6.2 DSM functions Jerry Hoemann <jerry.hoemann@hpe.com> - 2017-06-09 19:00 +0200
          Re: [PATCH 3/3] libnvdimm: New ACPI 6.2 DSM functions Dan Williams <dan.j.williams@intel.com> - 2017-06-09 19:20 +0200

csiph-web