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authorAndres Rodriguez <andresx7@gmail.com>2016-12-22 17:06:50 -0500
committerAlex Deucher <alexander.deucher@amd.com>2017-10-09 16:30:20 -0400
commitc2636dc53abd8269a0930bccd564f2f195dba729 (patch)
treee397399dbfcdf636586b82aa92be742fb7aaf739 /include
parent177ae09b5d699a5ebd1cafcee78889db968abf54 (diff)
drm/amdgpu: add parameter to allocate high priority contexts v11
Add a new context creation parameter to express a global context priority. The priority ranking in descending order is as follows: * AMDGPU_CTX_PRIORITY_HIGH_HW * AMDGPU_CTX_PRIORITY_HIGH_SW * AMDGPU_CTX_PRIORITY_NORMAL * AMDGPU_CTX_PRIORITY_LOW_SW * AMDGPU_CTX_PRIORITY_LOW_HW The driver will attempt to schedule work to the hardware according to the priorities. No latency or throughput guarantees are provided by this patch. This interface intends to service the EGL_IMG_context_priority extension, and vulkan equivalents. Setting a priority above NORMAL requires CAP_SYS_NICE or DRM_MASTER. v2: Instead of using flags, repurpose __pad v3: Swap enum values of _NORMAL _HIGH for backwards compatibility v4: Validate usermode priority and store it v5: Move priority validation into amdgpu_ctx_ioctl(), headline reword v6: add UAPI note regarding priorities requiring CAP_SYS_ADMIN v7: remove ctx->priority v8: added AMDGPU_CTX_PRIORITY_LOW, s/CAP_SYS_ADMIN/CAP_SYS_NICE v9: change the priority parameter to __s32 v10: split priorities into _SW and _HW v11: Allow DRM_MASTER without CAP_SYS_NICE Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Reviewed-by: Christian K├Ânig <christian.koenig@amd.com> Signed-off-by: Andres Rodriguez <andresx7@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'include')
-rw-r--r--include/uapi/drm/amdgpu_drm.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index b62484af8ccb..94ef0af492dc 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -168,13 +168,21 @@ union drm_amdgpu_bo_list {
/* unknown cause */
#define AMDGPU_CTX_UNKNOWN_RESET 3
+/* Context priority level */
+#define AMDGPU_CTX_PRIORITY_LOW_HW -1023
+#define AMDGPU_CTX_PRIORITY_LOW_SW -512
+#define AMDGPU_CTX_PRIORITY_NORMAL 0
+/* Selecting a priority above NORMAL requires CAP_SYS_NICE or DRM_MASTER */
+#define AMDGPU_CTX_PRIORITY_HIGH_SW 512
+#define AMDGPU_CTX_PRIORITY_HIGH_HW 1023
+
struct drm_amdgpu_ctx_in {
/** AMDGPU_CTX_OP_* */
__u32 op;
/** For future use, no flags defined so far */
__u32 flags;
__u32 ctx_id;
- __u32 _pad;
+ __s32 priority;
};
union drm_amdgpu_ctx_out {

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