fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2026-05-05 16:08:04 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

i965: Query and store GPU properties from kernel

Browse source 
Certain products are not uniquely identifiable based on device id alone. The
kernel exports an interface to help deal with this. This patch merely introduces
the consumer of the interface and makes sure nothing breaks.

It is also possible to use these values for programming GPGPU mode, and I plan
to do that as well.

The interface was introduced in libdrm 2.4.60, which is already required, so it
should all be fine.

v2: Some minor changes recommended by Matt

Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Ben Widawsky 2016-02-08 11:52:17 -08:00
parent 9908b13af6
commit 38eb606884
2 changed files with 31 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
src/mesa/drivers/dri/i965/intel_screen.c
View file

@ -1082,6 +1082,7 @@ static bool
intel_init_bufmgr(struct intel_screen *intelScreen)
{
__DRIscreen *spriv = intelScreen->driScrnPriv;
bool devid_override = getenv("INTEL_DEVID_OVERRIDE") != NULL;
intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
@ -1099,6 +1100,25 @@ intel_init_bufmgr(struct intel_screen *intelScreen)
return false;
}
intelScreen->subslice_total = -1;
intelScreen->eu_total = -1;
/* Everything below this is for real hardware only */
if (intelScreen->no_hw || devid_override)
return true;
intel_get_param(spriv, I915_PARAM_SUBSLICE_TOTAL,
&intelScreen->subslice_total);
intel_get_param(spriv, I915_PARAM_EU_TOTAL, &intelScreen->eu_total);
/* Without this information, we cannot get the right Braswell brandstrings,
* and we have to use conservative numbers for GPGPU on many platforms, but
* otherwise, things will just work.
*/
if (intelScreen->subslice_total == -1 || intelScreen->eu_total == -1)
_mesa_warning(NULL,
"Kernel 4.1 required to properly query GPU properties.\n");
return true;
}

12
src/mesa/drivers/dri/i965/intel_screen.h
View file

@ -81,7 +81,17 @@ struct intel_screen
* I915_PARAM_CMD_PARSER_VERSION parameter
*/
int cmd_parser_version;
};
/**
* Number of subslices reported by the I915_PARAM_SUBSLICE_TOTAL parameter
*/
int subslice_total;
/**
* Number of EUs reported by the I915_PARAM_EU_TOTAL parameter
*/
int eu_total;
};
extern void intelDestroyContext(__DRIcontext * driContextPriv);