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dma-buf: allow reserving more than one shared fence slot

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Let's support simultaneous submissions to multiple engines.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Link: https://patchwork.kernel.org/patch/10626149/
This commit is contained in:
Christian König 2018-09-19 16:12:25 +02:00
parent 27836b641c
commit ca05359f1e
16 changed files with 28 additions and 23 deletions
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13
drivers/dma-buf/reservation.c
View File

@ -56,9 +56,10 @@ const char reservation_seqcount_string[] = "reservation_seqcount";
EXPORT_SYMBOL(reservation_seqcount_string);
/**
* reservation_object_reserve_shared - Reserve space to add a shared
* fence to a reservation_object.
* reservation_object_reserve_shared - Reserve space to add shared fences to
* a reservation_object.
* @obj: reservation object
* @num_fences: number of fences we want to add
*
* Should be called before reservation_object_add_shared_fence(). Must
* be called with obj->lock held.
@ -66,7 +67,8 @@ EXPORT_SYMBOL(reservation_seqcount_string);
* RETURNS
* Zero for success, or -errno
*/
int reservation_object_reserve_shared(struct reservation_object *obj)
int reservation_object_reserve_shared(struct reservation_object *obj,
unsigned int num_fences)
{
struct reservation_object_list *old, *new;
unsigned int i, j, k, max;
@ -74,10 +76,11 @@ int reservation_object_reserve_shared(struct reservation_object *obj)
old = reservation_object_get_list(obj);
if (old && old->shared_max) {
if (old->shared_count < old->shared_max)
if ((old->shared_count + num_fences) <= old->shared_max)
return 0;
else
max = old->shared_max * 2;
max = max(old->shared_count + num_fences,
old->shared_max * 2);
} else {
max = 4;
}

2
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
View File

@ -955,7 +955,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
if (r)
return r;
r = reservation_object_reserve_shared(vm->root.base.bo->tbo.resv);
r = reservation_object_reserve_shared(vm->root.base.bo->tbo.resv, 1);
if (r)
return r;

2
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
View File

@ -640,7 +640,7 @@ int amdgpu_bo_backup_to_shadow(struct amdgpu_device *adev,
bo_addr = amdgpu_bo_gpu_offset(bo);
shadow_addr = amdgpu_bo_gpu_offset(bo->shadow);
r = reservation_object_reserve_shared(bo->tbo.resv);
r = reservation_object_reserve_shared(bo->tbo.resv, 1);
if (r)
goto err;

4
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
View File

@ -772,7 +772,7 @@ static int amdgpu_vm_clear_bo(struct amdgpu_device *adev,
ring = container_of(vm->entity.rq->sched, struct amdgpu_ring, sched);
r = reservation_object_reserve_shared(bo->tbo.resv);
r = reservation_object_reserve_shared(bo->tbo.resv, 1);
if (r)
return r;
@ -1839,7 +1839,7 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
if (r)
goto error_free;
r = reservation_object_reserve_shared(vm->root.base.bo->tbo.resv);
r = reservation_object_reserve_shared(vm->root.base.bo->tbo.resv, 1);
if (r)
goto error_free;

2
drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
View File

@ -179,7 +179,7 @@ static int submit_fence_sync(struct etnaviv_gem_submit *submit)
struct reservation_object *robj = bo->obj->resv;
if (!(bo->flags & ETNA_SUBMIT_BO_WRITE)) {
ret = reservation_object_reserve_shared(robj);
ret = reservation_object_reserve_shared(robj, 1);
if (ret)
return ret;
}

2
drivers/gpu/drm/i915/i915_vma.c
View File

@ -892,7 +892,7 @@ static void export_fence(struct i915_vma *vma,
reservation_object_lock(resv, NULL);
if (flags & EXEC_OBJECT_WRITE)
reservation_object_add_excl_fence(resv, &rq->fence);
else if (reservation_object_reserve_shared(resv) == 0)
else if (reservation_object_reserve_shared(resv, 1) == 0)
reservation_object_add_shared_fence(resv, &rq->fence);
reservation_object_unlock(resv);
}

3
drivers/gpu/drm/msm/msm_gem_submit.c
View File

@ -241,7 +241,8 @@ static int submit_fence_sync(struct msm_gem_submit *submit, bool no_implicit)
* strange place to call it. OTOH this is a
* convenient can-fail point to hook it in.
*/
ret = reservation_object_reserve_shared(msm_obj->resv);
ret = reservation_object_reserve_shared(msm_obj->resv,
1);
if (ret)
return ret;
}

2
drivers/gpu/drm/nouveau/nouveau_fence.c
View File

@ -341,7 +341,7 @@ nouveau_fence_sync(struct nouveau_bo *nvbo, struct nouveau_channel *chan, bool e
int ret = 0, i;
if (!exclusive) {
ret = reservation_object_reserve_shared(resv);
ret = reservation_object_reserve_shared(resv, 1);
if (ret)
return ret;

2
drivers/gpu/drm/qxl/qxl_release.c
View File

@ -234,7 +234,7 @@ static int qxl_release_validate_bo(struct qxl_bo *bo)
return ret;
}
ret = reservation_object_reserve_shared(bo->tbo.resv);
ret = reservation_object_reserve_shared(bo->tbo.resv, 1);
if (ret)
return ret;

2
drivers/gpu/drm/radeon/radeon_vm.c
View File

@ -831,7 +831,7 @@ static int radeon_vm_update_ptes(struct radeon_device *rdev,
int r;
radeon_sync_resv(rdev, &ib->sync, pt->tbo.resv, true);
r = reservation_object_reserve_shared(pt->tbo.resv);
r = reservation_object_reserve_shared(pt->tbo.resv, 1);
if (r)
return r;

4
drivers/gpu/drm/ttm/ttm_bo.c
View File

@ -872,7 +872,7 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
if (fence) {
reservation_object_add_shared_fence(bo->resv, fence);
ret = reservation_object_reserve_shared(bo->resv);
ret = reservation_object_reserve_shared(bo->resv, 1);
if (unlikely(ret))
return ret;
@ -977,7 +977,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
bool has_erestartsys = false;
int i, ret;
ret = reservation_object_reserve_shared(bo->resv);
ret = reservation_object_reserve_shared(bo->resv, 1);
if (unlikely(ret))
return ret;

4
drivers/gpu/drm/ttm/ttm_execbuf_util.c
View File

@ -129,7 +129,7 @@ int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
if (!entry->shared)
continue;
ret = reservation_object_reserve_shared(bo->resv);
ret = reservation_object_reserve_shared(bo->resv, 1);
if (!ret)
continue;
}
@ -151,7 +151,7 @@ int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
}
if (!ret && entry->shared)
ret = reservation_object_reserve_shared(bo->resv);
ret = reservation_object_reserve_shared(bo->resv, 1);
if (unlikely(ret != 0)) {
if (ret == -EINTR)

2
drivers/gpu/drm/v3d/v3d_gem.c
View File

@ -305,7 +305,7 @@ v3d_lock_bo_reservations(struct drm_device *dev,
for (i = 0; i < exec->bo_count; i++) {
bo = to_v3d_bo(&exec->bo[i]->base);
ret = reservation_object_reserve_shared(bo->resv);
ret = reservation_object_reserve_shared(bo->resv, 1);
if (ret) {
v3d_unlock_bo_reservations(dev, exec, acquire_ctx);
return ret;

2
drivers/gpu/drm/vc4/vc4_gem.c
View File

@ -635,7 +635,7 @@ vc4_lock_bo_reservations(struct drm_device *dev,
for (i = 0; i < exec->bo_count; i++) {
bo = to_vc4_bo(&exec->bo[i]->base);
ret = reservation_object_reserve_shared(bo->resv);
ret = reservation_object_reserve_shared(bo->resv, 1);
if (ret) {
vc4_unlock_bo_reservations(dev, exec, acquire_ctx);
return ret;

2
drivers/gpu/drm/vgem/vgem_fence.c
View File

@ -180,7 +180,7 @@ int vgem_fence_attach_ioctl(struct drm_device *dev,
reservation_object_lock(resv, NULL);
if (arg->flags & VGEM_FENCE_WRITE)
reservation_object_add_excl_fence(resv, fence);
else if ((ret = reservation_object_reserve_shared(resv)) == 0)
else if ((ret = reservation_object_reserve_shared(resv, 1)) == 0)
reservation_object_add_shared_fence(resv, fence);
reservation_object_unlock(resv);

3
include/linux/reservation.h
View File

@ -261,7 +261,8 @@ reservation_object_get_excl_rcu(struct reservation_object *obj)
return fence;
}
int reservation_object_reserve_shared(struct reservation_object *obj);
int reservation_object_reserve_shared(struct reservation_object *obj,
unsigned int num_fences);
void reservation_object_add_shared_fence(struct reservation_object *obj,
struct dma_fence *fence);