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drm/msm/gpu: add per-process pagetables param

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For now it always returns '0' (false), but once the iommu work is in
place to enable per-process pagetables we can update the value returned.

Userspace needs to know this to make an informed decision about exposing
KHR_robustness.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
This commit is contained in:
Rob Clark 2019-04-15 16:55:45 -07:00
parent 6cd5235c31
commit d674c963af
2 changed files with 4 additions and 0 deletions
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3
drivers/gpu/drm/msm/adreno/adreno_gpu.c
View File

@ -63,6 +63,9 @@ int adreno_get_param(struct msm_gpu *gpu, uint32_t param, uint64_t *value)
case MSM_PARAM_NR_RINGS:
*value = gpu->nr_rings;
return 0;
case MSM_PARAM_PP_PGTABLE:
*value = 0;
return 0;
default:
DBG("%s: invalid param: %u", gpu->name, param);
return -EINVAL;

1
include/uapi/drm/msm_drm.h
View File

@ -74,6 +74,7 @@ struct drm_msm_timespec {
#define MSM_PARAM_TIMESTAMP 0x05
#define MSM_PARAM_GMEM_BASE 0x06
#define MSM_PARAM_NR_RINGS 0x07
#define MSM_PARAM_PP_PGTABLE 0x08 /* => 1 for per-process pagetables, else 0 */
struct drm_msm_param {
__u32 pipe; /* in, MSM_PIPE_x */