1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
new file mode 100644
index 000000000000..d9652fe32d6a
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2012 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * based on nouveau_prime.c
+ *
+ * Authors: Alex Deucher
+ */
+#include <drm/drmP.h>
+
+#include "amdgpu.h"
+#include <drm/amdgpu_drm.h>
+#include <linux/dma-buf.h>
+
+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);
+	int ret;
+
+	ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,
+			  &bo->dma_buf_vmap);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return bo->dma_buf_vmap.virtual;
+}
+
+void amdgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
+{
+	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
+
+	ttm_bo_kunmap(&bo->dma_buf_vmap);
+}
+
+struct drm_gem_object *amdgpu_gem_prime_import_sg_table(struct drm_device *dev,
+							struct dma_buf_attachment *attach,
+							struct sg_table *sg)
+{
+	struct amdgpu_device *adev = dev->dev_private;
+	struct amdgpu_bo *bo;
+	int ret;
+
+	ret = amdgpu_bo_create(adev, attach->dmabuf->size, PAGE_SIZE, false,
+			       AMDGPU_GEM_DOMAIN_GTT, 0, sg, &bo);
+	if (ret)
+		return ERR_PTR(ret);
+
+	mutex_lock(&adev->gem.mutex);
+	list_add_tail(&bo->list, &adev->gem.objects);
+	mutex_unlock(&adev->gem.mutex);
+
+	return &bo->gem_base;
+}
+
+int amdgpu_gem_prime_pin(struct drm_gem_object *obj)
+{
+	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
+	int ret = 0;
+
+	ret = amdgpu_bo_reserve(bo, false);
+	if (unlikely(ret != 0))
+		return ret;
+
+	/* pin buffer into GTT */
+	ret = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT, NULL);
+	amdgpu_bo_unreserve(bo);
+	return ret;
+}
+
+void amdgpu_gem_prime_unpin(struct drm_gem_object *obj)
+{
+	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
+	int ret = 0;
+
+	ret = amdgpu_bo_reserve(bo, false);
+	if (unlikely(ret != 0))
+		return;
+
+	amdgpu_bo_unpin(bo);
+	amdgpu_bo_unreserve(bo);
+}
+
+struct reservation_object *amdgpu_gem_prime_res_obj(struct drm_gem_object *obj)
+{
+	struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
+
+	return bo->tbo.resv;
+}
+
+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);
+
+	if (amdgpu_ttm_tt_has_userptr(bo->tbo.ttm))
+		return ERR_PTR(-EPERM);
+
+	return drm_gem_prime_export(dev, gobj, flags);
+}