v2: drop hdp invalidate/flush. Signed-off-by: Samuel Li <samuel...@amd.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 3 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 3 +- drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | 77 ++++++++++++++++++++++++++++++- 3 files changed, 81 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index d2aaad7..188b705 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -395,11 +395,14 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev, struct drm_gem_object *gobj, int flags); +struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev, + struct dma_buf *dma_buf); int amdgpu_gem_prime_pin(struct drm_gem_object *obj); void amdgpu_gem_prime_unpin(struct drm_gem_object *obj); struct reservation_object *amdgpu_gem_prime_res_obj(struct drm_gem_object *); void *amdgpu_gem_prime_vmap(struct drm_gem_object *obj); void amdgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr); +int amdgpu_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma); int amdgpu_gem_debugfs_init(struct amdgpu_device *adev); /* sub-allocation manager, it has to be protected by another lock. diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 2cdf844..9b63ac5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -835,7 +835,7 @@ static struct drm_driver kms_driver = { .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_export = amdgpu_gem_prime_export, - .gem_prime_import = drm_gem_prime_import, + .gem_prime_import = amdgpu_gem_prime_import, .gem_prime_pin = amdgpu_gem_prime_pin, .gem_prime_unpin = amdgpu_gem_prime_unpin, .gem_prime_res_obj = amdgpu_gem_prime_res_obj, @@ -843,6 +843,7 @@ static struct drm_driver kms_driver = { .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, + .gem_prime_mmap = amdgpu_gem_prime_mmap, .name = DRIVER_NAME, .desc = DRIVER_DESC, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c index 5b3f928..13c977a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c @@ -57,6 +57,40 @@ void amdgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) ttm_bo_kunmap(&bo->dma_buf_vmap); } +int amdgpu_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma) +{ + struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); + struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); + unsigned asize = amdgpu_bo_size(bo); + int ret; + + if (!vma->vm_file) + return -ENODEV; + + if (adev == NULL) + return -ENODEV; + + /* Check for valid size. */ + if (asize < vma->vm_end - vma->vm_start) + return -EINVAL; + + if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm) || + (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) { + return -EPERM; + } + vma->vm_pgoff = amdgpu_bo_mmap_offset(bo) >> PAGE_SHIFT; + + /* prime mmap does not need to check access, so allow here */ + ret = drm_vma_node_allow(&obj->vma_node, vma->vm_file->private_data); + if (ret) + return ret; + + ret = ttm_bo_mmap(vma->vm_file, vma, &adev->mman.bdev); + drm_vma_node_revoke(&obj->vma_node, vma->vm_file->private_data); + + return ret; +} + struct drm_gem_object * amdgpu_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, @@ -130,14 +164,55 @@ struct reservation_object *amdgpu_gem_prime_res_obj(struct drm_gem_object *obj) return bo->tbo.resv; } +static int amdgpu_gem_begin_cpu_access(struct dma_buf *dma_buf, enum dma_data_direction direction) +{ + return amdgpu_gem_prime_pin(dma_buf->priv); +} + +static int amdgpu_gem_end_cpu_access(struct dma_buf *dma_buf, enum dma_data_direction direction) +{ + amdgpu_gem_prime_unpin(dma_buf->priv); + + return 0; +} + +static struct dma_buf_ops amdgpu_dmabuf_ops; + struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev, struct drm_gem_object *gobj, int flags) { struct amdgpu_bo *bo = gem_to_amdgpu_bo(gobj); + struct dma_buf *dma_buf; if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm)) return ERR_PTR(-EPERM); - return drm_gem_prime_export(dev, gobj, flags); + dma_buf = drm_gem_prime_export(dev, gobj, flags); + amdgpu_dmabuf_ops = *(dma_buf->ops); + amdgpu_dmabuf_ops.begin_cpu_access = amdgpu_gem_begin_cpu_access; + amdgpu_dmabuf_ops.end_cpu_access = amdgpu_gem_end_cpu_access; + dma_buf->ops = &amdgpu_dmabuf_ops; + + return dma_buf; +} + +struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev, + struct dma_buf *dma_buf) +{ + struct drm_gem_object *obj; + + if (dma_buf->ops == &amdgpu_dmabuf_ops) { + obj = dma_buf->priv; + if (obj->dev == dev) { + /* + * Importing dmabuf exported from out own gem increases + * refcount on gem itself instead of f_count of dmabuf. + */ + drm_gem_object_get(obj); + return obj; + } + } + + return drm_gem_prime_import(dev, dma_buf); } -- 2.7.4 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx