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| author | Samuel Li <Samuel.Li@amd.com> | 2017-08-22 15:25:33 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-09-26 15:14:37 -0400 |
| commit | dfced2e4bcbc8d6bd9bad11cc6b4643ba36ed35a (patch) | |
| tree | 217d000e2043004a94b4972889126d2ea558e659 /drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | |
| parent | aec8d5cc28b32b02e09c92c422f4a4ed9f53ff74 (diff) | |
| download | linux-dfced2e4bcbc8d6bd9bad11cc6b4643ba36ed35a.tar.bz2 | |
drm/amdgpu: Add gem_prime_mmap support
v2: drop hdp invalidate/flush.
v3: honor pgoff during prime mmap. Add a barrier after cpu access.
v4: drop begin/end_cpu_access() for now, revisit later.
Signed-off-by: Samuel Li <Samuel.Li@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c index 7e0826469b5e..90af8e82b16a 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, |