1 files changed, 110 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_prime.c b/drivers/gpu/drm/radeon/radeon_prime.c
new file mode 100644
index 000000000..42a87948e
--- /dev/null
+++ b/drivers/gpu/drm/radeon/radeon_prime.c
@@ -0,0 +1,110 @@
+/*
+ * 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 <linux/dma-buf.h>
+
+#include <drm/drm_prime.h>
+#include <drm/radeon_drm.h>
+
+#include "radeon.h"
+#include "radeon_prime.h"
+
+struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj)
+{
+	struct radeon_bo *bo = gem_to_radeon_bo(obj);
+
+	return drm_prime_pages_to_sg(obj->dev, bo->tbo.ttm->pages,
+				     bo->tbo.ttm->num_pages);
+}
+
+struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
+							struct dma_buf_attachment *attach,
+							struct sg_table *sg)
+{
+	struct dma_resv *resv = attach->dmabuf->resv;
+	struct radeon_device *rdev = dev->dev_private;
+	struct radeon_bo *bo;
+	int ret;
+
+	dma_resv_lock(resv, NULL);
+	ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false,
+			       RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo);
+	dma_resv_unlock(resv);
+	if (ret)
+		return ERR_PTR(ret);
+
+	bo->tbo.base.funcs = &radeon_gem_object_funcs;
+
+	mutex_lock(&rdev->gem.mutex);
+	list_add_tail(&bo->list, &rdev->gem.objects);
+	mutex_unlock(&rdev->gem.mutex);
+
+	bo->prime_shared_count = 1;
+	return &bo->tbo.base;
+}
+
+int radeon_gem_prime_pin(struct drm_gem_object *obj)
+{
+	struct radeon_bo *bo = gem_to_radeon_bo(obj);
+	int ret = 0;
+
+	ret = radeon_bo_reserve(bo, false);
+	if (unlikely(ret != 0))
+		return ret;
+
+	/* pin buffer into GTT */
+	ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
+	if (likely(ret == 0))
+		bo->prime_shared_count++;
+
+	radeon_bo_unreserve(bo);
+	return ret;
+}
+
+void radeon_gem_prime_unpin(struct drm_gem_object *obj)
+{
+	struct radeon_bo *bo = gem_to_radeon_bo(obj);
+	int ret = 0;
+
+	ret = radeon_bo_reserve(bo, false);
+	if (unlikely(ret != 0))
+		return;
+
+	radeon_bo_unpin(bo);
+	if (bo->prime_shared_count)
+		bo->prime_shared_count--;
+	radeon_bo_unreserve(bo);
+}
+
+
+struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj,
+					int flags)
+{
+	struct radeon_bo *bo = gem_to_radeon_bo(gobj);
+	if (radeon_ttm_tt_has_userptr(bo->rdev, bo->tbo.ttm))
+		return ERR_PTR(-EPERM);
+	return drm_gem_prime_export(gobj, flags);
+}