Add a new context creation parameter to express a global context priority.
Contexts allocated with AMDGPU_CTX_PRIORITY_HIGH will receive higher
priority to schedule their work than AMDGPU_CTX_PRIORITY_NORMAL
(default) contexts.
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
Reviewed-by: Emil Velikov <emil.l.velikov at gmail.com>
Reviewed-by: Christian König <christian.koenig at amd.com>
Signed-off-by: Andres Rodriguez <andresx7 at gmail.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c | 36 ++++++++++++++++++++++++---
drivers/gpu/drm/amd/scheduler/gpu_scheduler.h | 1 +
include/uapi/drm/amdgpu_drm.h | 8 +++++-
3 files changed, 40 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
index 1969f27..df6fc9d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
@@ -8,67 +8,75 @@
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: monk liu <monk.liu at amd.com>
*/
#include <drm/drmP.h>
#include "amdgpu.h"
-static int amdgpu_ctx_init(struct amdgpu_device *adev, struct amdgpu_ctx *ctx)
+static int amdgpu_ctx_init(struct amdgpu_device *adev,
+ enum amd_sched_priority priority,
+ struct amdgpu_ctx *ctx)
{
unsigned i, j;
int r;
+ if (priority < 0 || priority >= AMD_SCHED_PRIORITY_MAX)
+ return -EINVAL;
+
+ if (priority == AMD_SCHED_PRIORITY_HIGH && !capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
memset(ctx, 0, sizeof(*ctx));
ctx->adev = adev;
kref_init(&ctx->refcount);
spin_lock_init(&ctx->ring_lock);
ctx->fences = kcalloc(amdgpu_sched_jobs * AMDGPU_MAX_RINGS,
sizeof(struct dma_fence*), GFP_KERNEL);
if (!ctx->fences)
return -ENOMEM;
for (i = 0; i < AMDGPU_MAX_RINGS; ++i) {
ctx->rings[i].sequence = 1;
ctx->rings[i].fences = &ctx->fences[amdgpu_sched_jobs * i];
}
ctx->reset_counter = atomic_read(&adev->gpu_reset_counter);
/* create context entity for each ring */
for (i = 0; i < adev->num_rings; i++) {
struct amdgpu_ring *ring = adev->rings[i];
struct amd_sched_rq *rq;
- rq = &ring->sched.sched_rq[AMD_SCHED_PRIORITY_NORMAL];
+ rq = &ring->sched.sched_rq[priority];
r = amd_sched_entity_init(&ring->sched, &ctx->rings[i].entity,
rq, amdgpu_sched_jobs);
if (r)
goto failed;
}
r = amdgpu_queue_mgr_init(adev, &ctx->queue_mgr);
if (r)
goto failed;
return 0;
failed:
for (j = 0; j < i; j++)
amd_sched_entity_fini(&adev->rings[j]->sched,
&ctx->rings[j].entity);
kfree(ctx->fences);
ctx->fences = NULL;
return r;
}
@@ -79,59 +87,61 @@ static void amdgpu_ctx_fini(struct amdgpu_ctx *ctx)
unsigned i, j;
if (!adev)
return;
for (i = 0; i < AMDGPU_MAX_RINGS; ++i)
for (j = 0; j < amdgpu_sched_jobs; ++j)
dma_fence_put(ctx->rings[i].fences[j]);
kfree(ctx->fences);
ctx->fences = NULL;
for (i = 0; i < adev->num_rings; i++)
amd_sched_entity_fini(&adev->rings[i]->sched,
&ctx->rings[i].entity);
amdgpu_queue_mgr_fini(adev, &ctx->queue_mgr);
}
static int amdgpu_ctx_alloc(struct amdgpu_device *adev,
struct amdgpu_fpriv *fpriv,
+ enum amd_sched_priority priority,
uint32_t *id)
{
struct amdgpu_ctx_mgr *mgr = &fpriv->ctx_mgr;
struct amdgpu_ctx *ctx;
int r;
ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
mutex_lock(&mgr->lock);
r = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL);
if (r < 0) {
mutex_unlock(&mgr->lock);
kfree(ctx);
return r;
}
+
*id = (uint32_t)r;
- r = amdgpu_ctx_init(adev, ctx);
+ r = amdgpu_ctx_init(adev, priority, ctx);
if (r) {
idr_remove(&mgr->ctx_handles, *id);
*id = 0;
kfree(ctx);
}
mutex_unlock(&mgr->lock);
return r;
}
static void amdgpu_ctx_do_release(struct kref *ref)
{
struct amdgpu_ctx *ctx;
ctx = container_of(ref, struct amdgpu_ctx, refcount);
amdgpu_ctx_fini(ctx);
kfree(ctx);
}
@@ -167,56 +177,74 @@ static int amdgpu_ctx_query(struct amdgpu_device *adev,
return -EINVAL;
}
/* TODO: these two are always zero */
out->state.flags = 0x0;
out->state.hangs = 0x0;
/* determine if a GPU reset has occured since the last call */
reset_counter = atomic_read(&adev->gpu_reset_counter);
/* TODO: this should ideally return NO, GUILTY, or INNOCENT. */
if (ctx->reset_counter == reset_counter)
out->state.reset_status = AMDGPU_CTX_NO_RESET;
else
out->state.reset_status = AMDGPU_CTX_UNKNOWN_RESET;
ctx->reset_counter = reset_counter;
mutex_unlock(&mgr->lock);
return 0;
}
+static enum amd_sched_priority amdgpu_to_sched_priority(int amdgpu_priority)
+{
+ switch (amdgpu_priority) {
+ case AMDGPU_CTX_PRIORITY_HIGH:
+ return AMD_SCHED_PRIORITY_HIGH;
+ case AMDGPU_CTX_PRIORITY_NORMAL:
+ return AMD_SCHED_PRIORITY_NORMAL;
+ default:
+ WARN(1, "Invalid context priority %d\n", amdgpu_priority);
+ return AMD_SCHED_PRIORITY_NORMAL;
+ }
+}
+
int amdgpu_ctx_ioctl(struct drm_device *dev, void *data,
struct drm_file *filp)
{
int r;
uint32_t id;
+ enum amd_sched_priority priority;
union drm_amdgpu_ctx *args = data;
struct amdgpu_device *adev = dev->dev_private;
struct amdgpu_fpriv *fpriv = filp->driver_priv;
r = 0;
id = args->in.ctx_id;
+ priority = amdgpu_to_sched_priority(args->in.priority);
+
+ if (priority >= AMD_SCHED_PRIORITY_MAX)
+ return -EINVAL;
switch (args->in.op) {
case AMDGPU_CTX_OP_ALLOC_CTX:
- r = amdgpu_ctx_alloc(adev, fpriv, &id);
+ r = amdgpu_ctx_alloc(adev, fpriv, priority, &id);
args->out.alloc.ctx_id = id;
break;
case AMDGPU_CTX_OP_FREE_CTX:
r = amdgpu_ctx_free(fpriv, id);
break;
case AMDGPU_CTX_OP_QUERY_STATE:
r = amdgpu_ctx_query(adev, fpriv, id, &args->out);
break;
default:
return -EINVAL;
}
return r;
}
struct amdgpu_ctx *amdgpu_ctx_get(struct amdgpu_fpriv *fpriv, uint32_t id)
{
struct amdgpu_ctx *ctx;
struct amdgpu_ctx_mgr *mgr;
diff --git a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
index 0255c7f..e266e1e 100644
--- a/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
+++ b/drivers/gpu/drm/amd/scheduler/gpu_scheduler.h
@@ -93,40 +93,41 @@ static inline struct amd_sched_fence *to_amd_sched_fence(struct dma_fence *f)
if (f->ops == &amd_sched_fence_ops_finished)
return container_of(f, struct amd_sched_fence, finished);
return NULL;
}
/**
* Define the backend operations called by the scheduler,
* these functions should be implemented in driver side
*/
struct amd_sched_backend_ops {
struct dma_fence *(*dependency)(struct amd_sched_job *sched_job);
struct dma_fence *(*run_job)(struct amd_sched_job *sched_job);
void (*timedout_job)(struct amd_sched_job *sched_job);
void (*free_job)(struct amd_sched_job *sched_job);
};
enum amd_sched_priority {
AMD_SCHED_PRIORITY_MIN,
AMD_SCHED_PRIORITY_NORMAL = AMD_SCHED_PRIORITY_MIN,
+ AMD_SCHED_PRIORITY_HIGH,
AMD_SCHED_PRIORITY_KERNEL,
AMD_SCHED_PRIORITY_MAX
};
/**
* One scheduler is implemented for each hardware ring
*/
struct amd_gpu_scheduler {
const struct amd_sched_backend_ops *ops;
uint32_t hw_submission_limit;
long timeout;
const char *name;
struct amd_sched_rq sched_rq[AMD_SCHED_PRIORITY_MAX];
wait_queue_head_t wake_up_worker;
wait_queue_head_t job_scheduled;
atomic_t hw_rq_count;
atomic64_t job_id_count;
struct task_struct *thread;
struct list_head ring_mirror_list;
spinlock_t job_list_lock;
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 95260e5..a334598 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -143,47 +143,53 @@ struct drm_amdgpu_bo_list_out {
union drm_amdgpu_bo_list {
struct drm_amdgpu_bo_list_in in;
struct drm_amdgpu_bo_list_out out;
};
/* context related */
#define AMDGPU_CTX_OP_ALLOC_CTX 1
#define AMDGPU_CTX_OP_FREE_CTX 2
#define AMDGPU_CTX_OP_QUERY_STATE 3
/* GPU reset status */
#define AMDGPU_CTX_NO_RESET 0
/* this the context caused it */
#define AMDGPU_CTX_GUILTY_RESET 1
/* some other context caused it */
#define AMDGPU_CTX_INNOCENT_RESET 2
/* unknown cause */
#define AMDGPU_CTX_UNKNOWN_RESET 3
+/* Context priority level */
+#define AMDGPU_CTX_PRIORITY_NORMAL 0
+/* Selecting a priority above NORMAL requires CAP_SYS_ADMIN */
+#define AMDGPU_CTX_PRIORITY_HIGH 1
+#define AMDGPU_CTX_PRIORITY_NUM 2
+
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;
+ __u32 priority;
};
union drm_amdgpu_ctx_out {
struct {
__u32 ctx_id;
__u32 _pad;
} alloc;
struct {
/** For future use, no flags defined so far */
__u64 flags;
/** Number of resets caused by this context so far. */
__u32 hangs;
/** Reset status since the last call of the ioctl. */
__u32 reset_status;
} state;
};
union drm_amdgpu_ctx {
struct drm_amdgpu_ctx_in in;
--
2.9.3
