1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem_prime.c b/drivers/gpu/drm/msm/msm_gem_prime.c
new file mode 100644
index 000000000000..036d34c674d9
--- /dev/null
+++ b/drivers/gpu/drm/msm/msm_gem_prime.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013 Red Hat
+ * Author: Rob Clark <robdclark@gmail.com>
+ */
+
+#include <linux/dma-buf.h>
+
+#include <drm/drm_drv.h>
+#include <drm/drm_prime.h>
+
+#include "msm_drv.h"
+#include "msm_gem.h"
+
+struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
+{
+	struct msm_gem_object *msm_obj = to_msm_bo(obj);
+	size_t npages = obj->size >> PAGE_SHIFT;
+
+	if (msm_obj->flags & MSM_BO_NO_SHARE)
+		return ERR_PTR(-EINVAL);
+
+	if (WARN_ON(!msm_obj->pages))  /* should have already pinned! */
+		return ERR_PTR(-ENOMEM);
+
+	return drm_prime_pages_to_sg(obj->dev, msm_obj->pages, npages);
+}
+
+int msm_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
+{
+	void *vaddr;
+
+	vaddr = msm_gem_get_vaddr_locked(obj);
+	if (IS_ERR(vaddr))
+		return PTR_ERR(vaddr);
+	iosys_map_set_vaddr(map, vaddr);
+
+	return 0;
+}
+
+void msm_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
+{
+	msm_gem_put_vaddr_locked(obj);
+}
+
+static void msm_gem_dmabuf_release(struct dma_buf *dma_buf)
+{
+	struct drm_gem_object *obj = dma_buf->priv;
+
+	msm_gem_vma_put(obj);
+	drm_gem_dmabuf_release(dma_buf);
+}
+
+static const struct dma_buf_ops msm_gem_prime_dmabuf_ops =  {
+	.attach = drm_gem_map_attach,
+	.detach = drm_gem_map_detach,
+	.map_dma_buf = drm_gem_map_dma_buf,
+	.unmap_dma_buf = drm_gem_unmap_dma_buf,
+	.release = msm_gem_dmabuf_release,
+	.mmap = drm_gem_dmabuf_mmap,
+	.vmap = drm_gem_dmabuf_vmap,
+	.vunmap = drm_gem_dmabuf_vunmap,
+};
+
+struct drm_gem_object *msm_gem_prime_import(struct drm_device *dev,
+					    struct dma_buf *buf)
+{
+	if (buf->ops == &msm_gem_prime_dmabuf_ops) {
+		struct drm_gem_object *obj = buf->priv;
+		if (obj->dev == dev) {
+			/*
+			 * Importing dmabuf exported from our 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, buf);
+}
+
+struct drm_gem_object *msm_gem_prime_import_sg_table(struct drm_device *dev,
+		struct dma_buf_attachment *attach, struct sg_table *sg)
+{
+	return msm_gem_import(dev, attach->dmabuf, sg);
+}
+
+struct dma_buf *msm_gem_prime_export(struct drm_gem_object *obj, int flags)
+{
+	if (to_msm_bo(obj)->flags & MSM_BO_NO_SHARE)
+		return ERR_PTR(-EPERM);
+
+	msm_gem_vma_get(obj);
+
+	struct drm_device *dev = obj->dev;
+	struct dma_buf_export_info exp_info = {
+		.exp_name = KBUILD_MODNAME, /* white lie for debug */
+		.owner = dev->driver->fops->owner,
+		.ops = &msm_gem_prime_dmabuf_ops,
+		.size = obj->size,
+		.flags = flags,
+		.priv = obj,
+		.resv = obj->resv,
+	};
+
+	return drm_gem_dmabuf_export(dev, &exp_info);
+}
+
+int msm_gem_prime_pin(struct drm_gem_object *obj)
+{
+	struct page **pages;
+	int ret = 0;
+
+	if (drm_gem_is_imported(obj))
+		return 0;
+
+	if (to_msm_bo(obj)->flags & MSM_BO_NO_SHARE)
+		return -EINVAL;
+
+	pages = msm_gem_pin_pages_locked(obj);
+	if (IS_ERR(pages))
+		ret = PTR_ERR(pages);
+
+	return ret;
+}
+
+void msm_gem_prime_unpin(struct drm_gem_object *obj)
+{
+	if (drm_gem_is_imported(obj))
+		return;
+
+	msm_gem_unpin_pages_locked(obj);
+}