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drm/i915: expose _SUBSLICE_MASK GETPARM 

Assuming a uniform mask across all slices, this enables userspace to
determine the specific sub slices can be enabled. This information is
required, for example, to be able to analyse some OA counter reports
where the counter configuration depends on the HW sub slice
configuration.

Signed-off-by: Robert Bragg <robert@sixbynine.org>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
This commit is contained in:
Robert Bragg 2017-06-13 12:23:00 +01:00 committed by Ben Widawsky
parent 7fed555c02
commit f532023381
2 changed files with 10 additions and 0 deletions
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5
drivers/gpu/drm/i915/i915_drv.c
View File

@ -379,6 +379,11 @@ static int i915_getparam(struct drm_device *dev, void *data,
if (!value)
return -ENODEV;
break;
case I915_PARAM_SUBSLICE_MASK:
value = INTEL_INFO(dev_priv)->sseu.subslice_mask;
if (!value)
return -ENODEV;
break;
default:
DRM_DEBUG("Unknown parameter %d\n", param->param);
return -EINVAL;

5
include/uapi/drm/i915_drm.h
View File

@ -421,6 +421,11 @@ typedef struct drm_i915_irq_wait {
/* Query the mask of slices available for this system */
#define I915_PARAM_SLICE_MASK 46
/* Assuming it's uniform for each slice, this queries the mask of subslices
* per-slice for this system.
*/
#define I915_PARAM_SUBSLICE_MASK 47
typedef struct drm_i915_getparam {
__s32 param;
/*