1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_prime.c b/drivers/gpu/drm/nouveau/nouveau_prime.c
new file mode 100644
index 000000000..9608121e4
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_prime.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2011 Red Hat 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.
+ *
+ * Authors: Dave Airlie
+ */
+
+#include <linux/dma-buf.h>
+
+#include "nouveau_drv.h"
+#include "nouveau_gem.h"
+
+struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj)
+{
+	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
+
+	return drm_prime_pages_to_sg(obj->dev, nvbo->bo.ttm->pages,
+				     nvbo->bo.ttm->num_pages);
+}
+
+struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
+							 struct dma_buf_attachment *attach,
+							 struct sg_table *sg)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct drm_gem_object *obj;
+	struct nouveau_bo *nvbo;
+	struct dma_resv *robj = attach->dmabuf->resv;
+	u64 size = attach->dmabuf->size;
+	int align = 0;
+	int ret;
+
+	dma_resv_lock(robj, NULL);
+	nvbo = nouveau_bo_alloc(&drm->client, &size, &align,
+				NOUVEAU_GEM_DOMAIN_GART, 0, 0);
+	if (IS_ERR(nvbo)) {
+		obj = ERR_CAST(nvbo);
+		goto unlock;
+	}
+
+	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
+
+	nvbo->bo.base.funcs = &nouveau_gem_object_funcs;
+
+	/* Initialize the embedded gem-object. We return a single gem-reference
+	 * to the caller, instead of a normal nouveau_bo ttm reference. */
+	ret = drm_gem_object_init(dev, &nvbo->bo.base, size);
+	if (ret) {
+		nouveau_bo_ref(NULL, &nvbo);
+		obj = ERR_PTR(-ENOMEM);
+		goto unlock;
+	}
+
+	ret = nouveau_bo_init(nvbo, size, align, NOUVEAU_GEM_DOMAIN_GART,
+			      sg, robj);
+	if (ret) {
+		obj = ERR_PTR(ret);
+		goto unlock;
+	}
+
+	obj = &nvbo->bo.base;
+
+unlock:
+	dma_resv_unlock(robj);
+	return obj;
+}
+
+int nouveau_gem_prime_pin(struct drm_gem_object *obj)
+{
+	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
+	int ret;
+
+	/* pin buffer into GTT */
+	ret = nouveau_bo_pin(nvbo, NOUVEAU_GEM_DOMAIN_GART, false);
+	if (ret)
+		return -EINVAL;
+
+	return 0;
+}
+
+void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
+{
+	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
+
+	nouveau_bo_unpin(nvbo);
+}