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drm/amdgpu/userq: enable support for queue priorities

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Enable users to create queues at different priority levels.
The highest level is restricted to drm master.

Reviewed-by: Sunil Khatri <sunil.khatri@amd.com>
Reviewed-by: Jesse.Zhang <Jesse.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2025-02-26 22:56:26 -05:00
parent 23a650bb9f
commit a5c34299d8
1 changed files with 25 additions and 1 deletions
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26
drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
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@@ -22,6 +22,7 @@
*
*/
#include <drm/drm_auth.h>
#include <drm/drm_exec.h>
#include <linux/pm_runtime.h>
@@ -266,6 +267,21 @@ amdgpu_userqueue_destroy(struct drm_file *filp, int queue_id)
return r;
}
static int amdgpu_userq_priority_permit(struct drm_file *filp,
int priority)
{
if (priority < AMDGPU_USERQ_CREATE_FLAGS_QUEUE_PRIORITY_HIGH)
return 0;
if (capable(CAP_SYS_NICE))
return 0;
if (drm_is_current_master(filp))
return 0;
return -EACCES;
}
static int
amdgpu_userqueue_create(struct drm_file *filp, union drm_amdgpu_userq *args)
{
@@ -278,6 +294,9 @@ amdgpu_userqueue_create(struct drm_file *filp, union drm_amdgpu_userq *args)
bool skip_map_queue;
uint64_t index;
int qid, r = 0;
int priority =
(args->in.flags & AMDGPU_USERQ_CREATE_FLAGS_QUEUE_PRIORITY_MASK) >>
AMDGPU_USERQ_CREATE_FLAGS_QUEUE_PRIORITY_SHIFT;
/* Usermode queues are only supported for GFX IP as of now */
if (args->in.ip_type != AMDGPU_HW_IP_GFX &&
@@ -287,6 +306,10 @@ amdgpu_userqueue_create(struct drm_file *filp, union drm_amdgpu_userq *args)
return -EINVAL;
}
r = amdgpu_userq_priority_permit(filp, priority);
if (r)
return r;
r = pm_runtime_get_sync(adev_to_drm(adev)->dev);
if (r < 0) {
dev_err(adev->dev, "pm_runtime_get_sync() failed for userqueue create\n");
@@ -319,6 +342,7 @@ amdgpu_userqueue_create(struct drm_file *filp, union drm_amdgpu_userq *args)
queue->doorbell_handle = args->in.doorbell_handle;
queue->queue_type = args->in.ip_type;
queue->vm = &fpriv->vm;
queue->priority = priority;
db_info.queue_type = queue->queue_type;
db_info.doorbell_handle = queue->doorbell_handle;
@@ -399,7 +423,7 @@ int amdgpu_userq_ioctl(struct drm_device *dev, void *data,
switch (args->in.op) {
case AMDGPU_USERQ_OP_CREATE:
if (args->in.flags)
if (args->in.flags & ~AMDGPU_USERQ_CREATE_FLAGS_QUEUE_PRIORITY_MASK)
return -EINVAL;
r = amdgpu_userqueue_create(filp, args);
if (r)