[PATCH 2/8] dma-buf: allow reserving more than one shared fence slot
Christian König
ckoenig.leichtzumerken at gmail.com
Thu Oct 4 13:12:44 UTC 2018
Let's support simultaneous submissions to multiple engines.
Signed-off-by: Christian König <christian.koenig at amd.com>
---
drivers/dma-buf/reservation.c | 13 ++++++++-----
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 4 ++--
drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 2 +-
drivers/gpu/drm/i915/i915_vma.c | 2 +-
drivers/gpu/drm/msm/msm_gem_submit.c | 3 ++-
drivers/gpu/drm/nouveau/nouveau_fence.c | 2 +-
drivers/gpu/drm/qxl/qxl_release.c | 2 +-
drivers/gpu/drm/radeon/radeon_vm.c | 2 +-
drivers/gpu/drm/ttm/ttm_bo.c | 4 ++--
drivers/gpu/drm/ttm/ttm_execbuf_util.c | 4 ++--
drivers/gpu/drm/v3d/v3d_gem.c | 2 +-
drivers/gpu/drm/vc4/vc4_gem.c | 2 +-
drivers/gpu/drm/vgem/vgem_fence.c | 2 +-
include/linux/reservation.h | 3 ++-
16 files changed, 28 insertions(+), 23 deletions(-)
diff --git a/drivers/dma-buf/reservation.c b/drivers/dma-buf/reservation.c
index 5825fc336a13..5fb4fd461908 100644
--- a/drivers/dma-buf/reservation.c
+++ b/drivers/dma-buf/reservation.c
@@ -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;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 8836186eb5ef..3243da67db9e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -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;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 904014dc5915..cf768acb51dc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -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;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 6904d794d60a..bdce05183edb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -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;
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
index 983e67f19e45..30875f8f2933 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
@@ -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;
}
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index 11d834f94220..f74c856858f9 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -893,7 +893,7 @@ 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);
}
diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c
index 7bd83e0afa97..acc5da791e36 100644
--- a/drivers/gpu/drm/msm/msm_gem_submit.c
+++ b/drivers/gpu/drm/msm/msm_gem_submit.c
@@ -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;
}
diff --git a/drivers/gpu/drm/nouveau/nouveau_fence.c b/drivers/gpu/drm/nouveau/nouveau_fence.c
index 412d49bc6e56..bd58298afe12 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fence.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fence.c
@@ -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;
diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c
index e37f0097f744..a8d5457a1af9 100644
--- a/drivers/gpu/drm/qxl/qxl_release.c
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -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;
diff --git a/drivers/gpu/drm/radeon/radeon_vm.c b/drivers/gpu/drm/radeon/radeon_vm.c
index 7f1a9c787bd1..fed11ece0de6 100644
--- a/drivers/gpu/drm/radeon/radeon_vm.c
+++ b/drivers/gpu/drm/radeon/radeon_vm.c
@@ -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;
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 26b889f86670..83b4657ffb10 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -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;
diff --git a/drivers/gpu/drm/ttm/ttm_execbuf_util.c b/drivers/gpu/drm/ttm/ttm_execbuf_util.c
index e73ae0d22897..e493edb0d3e7 100644
--- a/drivers/gpu/drm/ttm/ttm_execbuf_util.c
+++ b/drivers/gpu/drm/ttm/ttm_execbuf_util.c
@@ -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)
diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
index 5ce24098a5fd..4a46376ff795 100644
--- a/drivers/gpu/drm/v3d/v3d_gem.c
+++ b/drivers/gpu/drm/v3d/v3d_gem.c
@@ -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;
diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
index 7910b9acedd6..5f768d886cb2 100644
--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -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;
diff --git a/drivers/gpu/drm/vgem/vgem_fence.c b/drivers/gpu/drm/vgem/vgem_fence.c
index b28876c222b4..f2692e5abac2 100644
--- a/drivers/gpu/drm/vgem/vgem_fence.c
+++ b/drivers/gpu/drm/vgem/vgem_fence.c
@@ -193,7 +193,7 @@ 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);
diff --git a/include/linux/reservation.h b/include/linux/reservation.h
index 54cf6773a14c..5ddb0e143721 100644
--- a/include/linux/reservation.h
+++ b/include/linux/reservation.h
@@ -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);
--
2.14.1
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