From c2636dc53abd8269a0930bccd564f2f195dba729 Mon Sep 17 00:00:00 2001
From: Andres Rodriguez <andresx7@gmail.com>
Date: Thu, 22 Dec 2016 17:06:50 -0500
Subject: drm/amdgpu: add parameter to allocate high priority contexts v11
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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 König <christian.koenig@amd.com>
Signed-off-by: Andres Rodriguez <andresx7@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/scheduler/gpu_scheduler.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
(limited to 'drivers/gpu/drm/amd/scheduler/gpu_scheduler.h')
diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
index f9d8f28efd16..38e622ce06de 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
@@ -115,7 +115,10 @@ struct amd_sched_backend_ops {
enum amd_sched_priority {
AMD_SCHED_PRIORITY_MIN,
- AMD_SCHED_PRIORITY_NORMAL = AMD_SCHED_PRIORITY_MIN,
+ AMD_SCHED_PRIORITY_LOW = AMD_SCHED_PRIORITY_MIN,
+ AMD_SCHED_PRIORITY_NORMAL,
+ AMD_SCHED_PRIORITY_HIGH_SW,
+ AMD_SCHED_PRIORITY_HIGH_HW,
AMD_SCHED_PRIORITY_KERNEL,
AMD_SCHED_PRIORITY_MAX
};
--
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