Instead of relying on the DRM functions just implement our own export functions. This adds support for taking care of unpinned DMA-buf.
v2: fix unintended recursion, remove debugging leftovers
Signed-off-by: Christian König christian.koenig@amd.com --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 - drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 1 - drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 5 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | 110 ++++++++++++++++++----------- 4 files changed, 73 insertions(+), 44 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 96bcdb97e7e2..909dc9764a22 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -371,7 +371,6 @@ int amdgpu_gem_object_open(struct drm_gem_object *obj, void amdgpu_gem_object_close(struct drm_gem_object *obj, struct drm_file *file_priv); unsigned long amdgpu_gem_timeout(uint64_t timeout_ns); -struct sg_table *amdgpu_gem_prime_get_sg_table(struct drm_gem_object *obj); struct drm_gem_object * amdgpu_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index e6709362994a..e32dcdf8d3db 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -886,7 +886,6 @@ static struct drm_driver kms_driver = { .gem_prime_export = amdgpu_gem_prime_export, .gem_prime_import = amdgpu_gem_prime_import, .gem_prime_res_obj = amdgpu_gem_prime_res_obj, - .gem_prime_get_sg_table = amdgpu_gem_prime_get_sg_table, .gem_prime_import_sg_table = amdgpu_gem_prime_import_sg_table, .gem_prime_vmap = amdgpu_gem_prime_vmap, .gem_prime_vunmap = amdgpu_gem_prime_vunmap, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c index 48e0115d4f76..18483a79dcdd 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c @@ -31,6 +31,7 @@ */ #include <linux/list.h> #include <linux/slab.h> +#include <linux/dma-buf.h> #include <drm/drmP.h> #include <drm/amdgpu_drm.h> #include <drm/drm_cache.h> @@ -931,6 +932,10 @@ void amdgpu_bo_move_notify(struct ttm_buffer_object *bo,
amdgpu_bo_kunmap(abo);
+ if (abo->gem_base.dma_buf && !abo->gem_base.import_attach && + bo->mem.mem_type != TTM_PL_SYSTEM) + dma_buf_invalidate_mappings(abo->gem_base.dma_buf); + /* remember the eviction */ if (evict) atomic64_inc(&adev->num_evictions); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c index 1c9991738477..7b9edbc938eb 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c @@ -32,14 +32,6 @@
static const struct dma_buf_ops amdgpu_dmabuf_ops;
-struct sg_table *amdgpu_gem_prime_get_sg_table(struct drm_gem_object *obj) -{ - struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); - int npages = bo->tbo.num_pages; - - return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages); -} - void *amdgpu_gem_prime_vmap(struct drm_gem_object *obj) { struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); @@ -126,22 +118,21 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev, return ERR_PTR(ret); }
-static int amdgpu_gem_map_attach(struct dma_buf *dma_buf, - struct device *target_dev, - struct dma_buf_attachment *attach) +static struct sg_table * +amdgpu_gem_map_dma_buf(struct dma_buf_attachment *attach, + enum dma_data_direction dir) { + struct dma_buf *dma_buf = attach->dmabuf; struct drm_gem_object *obj = dma_buf->priv; struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); + struct sg_table *sgt; long r;
- r = drm_gem_map_attach(dma_buf, target_dev, attach); - if (r) - return r; - - r = amdgpu_bo_reserve(bo, false); - if (unlikely(r != 0)) - goto error_detach; - + if (!attach->invalidate_mappings) { + r = amdgpu_bo_reserve(bo, false); + if (unlikely(r != 0)) + return ERR_PTR(r); + }
if (dma_buf->ops != &amdgpu_dmabuf_ops) { /* @@ -157,41 +148,77 @@ static int amdgpu_gem_map_attach(struct dma_buf *dma_buf, } }
- /* pin buffer into GTT */ - r = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT, NULL); - if (r) + if (!attach->invalidate_mappings) { + /* pin buffer into GTT */ + r = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT, NULL); + if (r) + goto error_unreserve; + + } else { + /* move buffer into GTT */ + struct ttm_operation_ctx ctx = { false, false }; + + amdgpu_ttm_placement_from_domain(bo, AMDGPU_GEM_DOMAIN_GTT); + r = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); + if (r) + goto error_unreserve; + } + + sgt = drm_prime_pages_to_sg(bo->tbo.ttm->pages, bo->tbo.num_pages); + if (IS_ERR(sgt)) { + r = PTR_ERR(sgt); goto error_unreserve; + } + + if (!dma_map_sg_attrs(attach->dev, sgt->sgl, sgt->nents, dir, + DMA_ATTR_SKIP_CPU_SYNC)) + goto error_free;
if (dma_buf->ops != &amdgpu_dmabuf_ops) bo->prime_shared_count++;
+ if (!attach->invalidate_mappings) + amdgpu_bo_unreserve(bo); + + return sgt; + +error_free: + sg_free_table(sgt); + kfree(sgt); + r = -ENOMEM; + error_unreserve: - amdgpu_bo_unreserve(bo); + if (!attach->invalidate_mappings) + amdgpu_bo_unreserve(bo);
-error_detach: - if (r) - drm_gem_map_detach(dma_buf, attach); - return r; + return ERR_PTR(r); }
-static void amdgpu_gem_map_detach(struct dma_buf *dma_buf, - struct dma_buf_attachment *attach) +static void amdgpu_gem_unmap_dma_buf(struct dma_buf_attachment *attach, + struct sg_table *sgt, + enum dma_data_direction dir) { + struct dma_buf *dma_buf = attach->dmabuf; struct drm_gem_object *obj = dma_buf->priv; struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); - int ret = 0;
- ret = amdgpu_bo_reserve(bo, true); - if (unlikely(ret != 0)) - goto error; + if (!attach->invalidate_mappings) { + amdgpu_bo_reserve(bo, true); + amdgpu_bo_unpin(bo); + }
- amdgpu_bo_unpin(bo); - if (dma_buf->ops != &amdgpu_dmabuf_ops && bo->prime_shared_count) + if (dma_buf->ops != &amdgpu_dmabuf_ops && + bo->prime_shared_count) bo->prime_shared_count--; - amdgpu_bo_unreserve(bo);
-error: - drm_gem_map_detach(dma_buf, attach); + if (!attach->invalidate_mappings) + amdgpu_bo_unreserve(bo); + + if (sgt) { + dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents, dir); + sg_free_table(sgt); + kfree(sgt); + } }
struct reservation_object *amdgpu_gem_prime_res_obj(struct drm_gem_object *obj) @@ -230,10 +257,9 @@ static int amdgpu_gem_begin_cpu_access(struct dma_buf *dma_buf, }
static const struct dma_buf_ops amdgpu_dmabuf_ops = { - .attach = amdgpu_gem_map_attach, - .detach = amdgpu_gem_map_detach, - .map_dma_buf = drm_gem_map_dma_buf, - .unmap_dma_buf = drm_gem_unmap_dma_buf, + .supports_mapping_invalidation = true, + .map_dma_buf = amdgpu_gem_map_dma_buf, + .unmap_dma_buf = amdgpu_gem_unmap_dma_buf, .release = drm_gem_dmabuf_release, .begin_cpu_access = amdgpu_gem_begin_cpu_access, .map = drm_gem_dmabuf_kmap,