Am 30.08.24 um 20:43 schrieb Arunpravin Paneer Selvam:
Add few optimizations to userq fence driver.
v1:(Christian):
- Remove unnecessary comments.
- In drm_exec_init call give num_bo_handles as last parameter it would
making allocation of the array more efficient
- Handle return value of __xa_store() and improve the error handling of
amdgpu_userq_fence_driver_alloc().
Signed-off-by: Arunpravin Paneer Selvam <arunpravin.paneersel...@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +-
.../gpu/drm/amd/amdgpu/amdgpu_userq_fence.c | 64 ++++++++++++-------
.../gpu/drm/amd/amdgpu/amdgpu_userq_fence.h | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c | 6 +-
.../gpu/drm/amd/include/amdgpu_userqueue.h | 2 +-
5 files changed, 48 insertions(+), 28 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 5ec6cb237c81..3c4568929d12 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3967,7 +3967,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
spin_lock_init(&adev->audio_endpt_idx_lock);
spin_lock_init(&adev->mm_stats.lock);
- xa_init_flags(&adev->userq_xa, XA_FLAGS_LOCK_IRQ);
+ xa_init_flags(&adev->userq_xa, XA_FLAGS_ALLOC);
I don't think that this is correct. The XA is used from IRQ context.
INIT_LIST_HEAD(&adev->shadow_list);
mutex_init(&adev->shadow_list_lock);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
index c6d201abf5ec..a30b8abe8a2f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
@@ -76,7 +76,8 @@ int amdgpu_userq_fence_driver_alloc(struct amdgpu_device
*adev,
fence_drv = kzalloc(sizeof(*fence_drv), GFP_KERNEL);
if (!fence_drv) {
DRM_ERROR("Failed to allocate memory for fence driver\n");
- return -ENOMEM;
+ r = -ENOMEM;
+ goto free_fence_drv;
}
/* Acquire seq64 memory */
@@ -84,7 +85,8 @@ int amdgpu_userq_fence_driver_alloc(struct amdgpu_device
*adev,
&fence_drv->cpu_addr);
if (r) {
kfree(fence_drv);
- return -ENOMEM;
+ r = -ENOMEM;
+ goto free_seq64;
}
memset(fence_drv->cpu_addr, 0, sizeof(u64));
@@ -94,18 +96,30 @@ int amdgpu_userq_fence_driver_alloc(struct amdgpu_device
*adev,
spin_lock_init(&fence_drv->fence_list_lock);
fence_drv->adev = adev;
- fence_drv->uq_fence_drv_xa_ref = &userq->uq_fence_drv_xa;
+ fence_drv->fence_drv_xa_ptr = &userq->fence_drv_xa;
fence_drv->context = dma_fence_context_alloc(1);
get_task_comm(fence_drv->timeline_name, current);
xa_lock_irqsave(&adev->userq_xa, flags);
- __xa_store(&adev->userq_xa, userq->doorbell_index,
- fence_drv, GFP_KERNEL);
+ r = xa_err(__xa_store(&adev->userq_xa, userq->doorbell_index,
+ fence_drv, GFP_KERNEL));
+ if (r)
+ goto xa_err;
+
xa_unlock_irqrestore(&adev->userq_xa, flags);
You can move the xa_unlock before the error check here.
And that looks like adding missing error handling and not just optimization.
userq->fence_drv = fence_drv;
return 0;
+
+xa_err:
+ xa_unlock_irqrestore(&adev->userq_xa, flags);
+free_seq64:
+ amdgpu_seq64_free(adev, fence_drv->gpu_addr);
+free_fence_drv:
+ kfree(fence_drv);
+
+ return r;
}
void amdgpu_userq_fence_driver_process(struct amdgpu_userq_fence_driver *fence_drv)
@@ -149,7 +163,7 @@ void amdgpu_userq_fence_driver_destroy(struct kref *ref)
struct amdgpu_device *adev = fence_drv->adev;
struct amdgpu_userq_fence *fence, *tmp;
struct xarray *xa = &adev->userq_xa;
- unsigned long index;
+ unsigned long index, flags;
struct dma_fence *f;
spin_lock(&fence_drv->fence_list_lock);
@@ -166,11 +180,11 @@ void amdgpu_userq_fence_driver_destroy(struct kref *ref)
}
spin_unlock(&fence_drv->fence_list_lock);
- xa_lock(xa);
+ xa_lock_irqsave(xa, flags);
xa_for_each(xa, index, xa_fence_drv)
if (xa_fence_drv == fence_drv)
__xa_erase(xa, index);
- xa_unlock(xa);
+ xa_unlock_irqrestore(xa, flags);
/* Free seq64 memory */
amdgpu_seq64_free(adev, fence_drv->gpu_addr);
@@ -214,12 +228,12 @@ int amdgpu_userq_fence_create(struct
amdgpu_usermode_queue *userq,
amdgpu_userq_fence_driver_get(fence_drv);
dma_fence_get(fence);
- if (!xa_empty(&userq->uq_fence_drv_xa)) {
+ if (!xa_empty(&userq->fence_drv_xa)) {
struct amdgpu_userq_fence_driver *stored_fence_drv;
unsigned long index, count = 0;
int i = 0;
- xa_for_each(&userq->uq_fence_drv_xa, index, stored_fence_drv)
+ xa_for_each(&userq->fence_drv_xa, index, stored_fence_drv)
count++;
userq_fence->fence_drv_array =
@@ -229,9 +243,9 @@ int amdgpu_userq_fence_create(struct amdgpu_usermode_queue
*userq,
userq_fence->fence_drv_array_count = count;
if (userq_fence->fence_drv_array) {
- xa_for_each(&userq->uq_fence_drv_xa, index,
stored_fence_drv) {
+ xa_for_each(&userq->fence_drv_xa, index,
stored_fence_drv) {
userq_fence->fence_drv_array[i] =
stored_fence_drv;
- xa_erase(&userq->uq_fence_drv_xa, index);
+ xa_erase(&userq->fence_drv_xa, index);
i++;
}
}
@@ -377,14 +391,12 @@ int amdgpu_userq_signal_ioctl(struct drm_device *dev,
void *data,
int r, i, entry;
u64 wptr;
- /* Array of syncobj handles */
num_syncobj_handles = args->num_syncobj_handles;
syncobj_handles =
memdup_user(u64_to_user_ptr(args->syncobj_handles_array),
sizeof(u32) * num_syncobj_handles);
if (IS_ERR(syncobj_handles))
return PTR_ERR(syncobj_handles);
- /* Array of syncobj object handles */
syncobj = kmalloc_array(num_syncobj_handles, sizeof(*syncobj),
GFP_KERNEL);
if (!syncobj) {
r = -ENOMEM;
@@ -399,14 +411,12 @@ int amdgpu_userq_signal_ioctl(struct drm_device *dev,
void *data,
}
}
- /* Array of bo handles */
num_bo_handles = args->num_bo_handles;
bo_handles = memdup_user(u64_to_user_ptr(args->bo_handles_array),
sizeof(u32) * num_bo_handles);
if (IS_ERR(bo_handles))
goto put_syncobj_handles;
- /* Array of GEM object handles */
gobj = kmalloc_array(num_bo_handles, sizeof(*gobj), GFP_KERNEL);
if (!gobj) {
r = -ENOMEM;
@@ -421,7 +431,9 @@ int amdgpu_userq_signal_ioctl(struct drm_device *dev, void
*data,
}
}
- drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, 0);
+ drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, num_bo_handles);
+
+ /* Lock all BOs with retry handling */
drm_exec_until_all_locked(&exec) {
r = drm_exec_prepare_array(&exec, gobj, num_bo_handles, 1);
drm_exec_retry_on_contention(&exec);
@@ -526,7 +538,6 @@ int amdgpu_userq_wait_ioctl(struct drm_device *dev, void
*data,
goto free_timeline_handles;
}
- /* Array of GEM object handles */
gobj = kmalloc_array(num_bo_handles, sizeof(*gobj), GFP_KERNEL);
if (!gobj) {
r = -ENOMEM;
@@ -541,7 +552,9 @@ int amdgpu_userq_wait_ioctl(struct drm_device *dev, void
*data,
}
}
- drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, 0);
+ drm_exec_init(&exec, DRM_EXEC_INTERRUPTIBLE_WAIT, num_bo_handles);
+
+ /* Lock all BOs with retry handling */
drm_exec_until_all_locked(&exec) {
r = drm_exec_prepare_array(&exec, gobj, num_bo_handles, 0);
drm_exec_retry_on_contention(&exec);
@@ -703,9 +716,16 @@ int amdgpu_userq_wait_ioctl(struct drm_device *dev, void
*data,
* Otherwise, we would gather those references until we
don't
* have any more space left and crash.
*/
- if (fence_drv->uq_fence_drv_xa_ref) {
- r = xa_alloc(fence_drv->uq_fence_drv_xa_ref,
&index, fence_drv,
- xa_limit_32b, GFP_KERNEL);
+ if (fence_drv->fence_drv_xa_ptr) {
+ /*
+ * Store the fence_drv reference into the
corresponding
+ * userq fence_drv_xa.
+ */
That comment looks superfluous to me.
+ r = xa_alloc(fence_drv->fence_drv_xa_ptr,
+ &index,
+ fence_drv,
+ xa_limit_32b,
+ GFP_KERNEL);
Please keep the coding style as it was, this actually matches the kernel
coding style better.
Christian.
if (r)
goto free_fences;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.h
index f72424248cc5..89c82ba38b50 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.h
@@ -54,7 +54,7 @@ struct amdgpu_userq_fence_driver {
spinlock_t fence_list_lock;
struct list_head fences;
struct amdgpu_device *adev;
- struct xarray *uq_fence_drv_xa_ref;
+ struct xarray *fence_drv_xa_ptr;
char timeline_name[TASK_COMM_LEN];
};
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
index e7f7354e0c0e..9b24218f7ad2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userqueue.c
@@ -48,8 +48,8 @@ static void amdgpu_userq_walk_and_drop_fence_drv(struct
xarray *xa)
static void
amdgpu_userq_fence_driver_free(struct amdgpu_usermode_queue *userq)
{
- amdgpu_userq_walk_and_drop_fence_drv(&userq->uq_fence_drv_xa);
- xa_destroy(&userq->uq_fence_drv_xa);
+ amdgpu_userq_walk_and_drop_fence_drv(&userq->fence_drv_xa);
+ xa_destroy(&userq->fence_drv_xa);
/* Drop the fence_drv reference held by user queue */
amdgpu_userq_fence_driver_put(userq->fence_drv);
}
@@ -348,7 +348,7 @@ amdgpu_userqueue_create(struct drm_file *filp, union
drm_amdgpu_userq *args)
}
queue->doorbell_index = index;
- xa_init_flags(&queue->uq_fence_drv_xa, XA_FLAGS_ALLOC);
+ xa_init_flags(&queue->fence_drv_xa, XA_FLAGS_ALLOC);
r = amdgpu_userq_fence_driver_alloc(adev, queue);
if (r) {
DRM_ERROR("Failed to alloc fence driver\n");
diff --git a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
index d035b5c2b14b..6eb094a54f4b 100644
--- a/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
+++ b/drivers/gpu/drm/amd/include/amdgpu_userqueue.h
@@ -52,7 +52,7 @@ struct amdgpu_usermode_queue {
struct amdgpu_userq_obj db_obj;
struct amdgpu_userq_obj fw_obj;
struct amdgpu_userq_obj wptr_obj;
- struct xarray uq_fence_drv_xa;
+ struct xarray fence_drv_xa;
struct amdgpu_userq_fence_driver *fence_drv;
struct dma_fence *last_fence;
};
