Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 147 insertions, 0 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
new file mode 100644
index 000000000..3524b5811
--- /dev/null
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2014-2018 Etnaviv Project
+ */
+
+#include <drm/drm_prime.h>
+#include <linux/dma-buf.h>
+#include <linux/module.h>
+
+#include "etnaviv_drv.h"
+#include "etnaviv_gem.h"
+
+MODULE_IMPORT_NS(DMA_BUF);
+
+static struct lock_class_key etnaviv_prime_lock_class;
+
+struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj)
+{
+	struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
+	int npages = obj->size >> PAGE_SHIFT;
+
+	if (WARN_ON(!etnaviv_obj->pages))  /* should have already pinned! */
+		return ERR_PTR(-EINVAL);
+
+	return drm_prime_pages_to_sg(obj->dev, etnaviv_obj->pages, npages);
+}
+
+int etnaviv_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
+{
+	void *vaddr;
+
+	vaddr = etnaviv_gem_vmap(obj);
+	if (!vaddr)
+		return -ENOMEM;
+	iosys_map_set_vaddr(map, vaddr);
+
+	return 0;
+}
+
+int etnaviv_gem_prime_pin(struct drm_gem_object *obj)
+{
+	if (!obj->import_attach) {
+		struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
+
+		mutex_lock(&etnaviv_obj->lock);
+		etnaviv_gem_get_pages(etnaviv_obj);
+		mutex_unlock(&etnaviv_obj->lock);
+	}
+	return 0;
+}
+
+void etnaviv_gem_prime_unpin(struct drm_gem_object *obj)
+{
+	if (!obj->import_attach) {
+		struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
+
+		mutex_lock(&etnaviv_obj->lock);
+		etnaviv_gem_put_pages(to_etnaviv_bo(obj));
+		mutex_unlock(&etnaviv_obj->lock);
+	}
+}
+
+static void etnaviv_gem_prime_release(struct etnaviv_gem_object *etnaviv_obj)
+{
+	struct iosys_map map = IOSYS_MAP_INIT_VADDR(etnaviv_obj->vaddr);
+
+	if (etnaviv_obj->vaddr)
+		dma_buf_vunmap_unlocked(etnaviv_obj->base.import_attach->dmabuf, &map);
+
+	/* Don't drop the pages for imported dmabuf, as they are not
+	 * ours, just free the array we allocated:
+	 */
+	kvfree(etnaviv_obj->pages);
+
+	drm_prime_gem_destroy(&etnaviv_obj->base, etnaviv_obj->sgt);
+}
+
+static void *etnaviv_gem_prime_vmap_impl(struct etnaviv_gem_object *etnaviv_obj)
+{
+	struct iosys_map map;
+	int ret;
+
+	lockdep_assert_held(&etnaviv_obj->lock);
+
+	ret = dma_buf_vmap(etnaviv_obj->base.import_attach->dmabuf, &map);
+	if (ret)
+		return NULL;
+	return map.vaddr;
+}
+
+static int etnaviv_gem_prime_mmap_obj(struct etnaviv_gem_object *etnaviv_obj,
+		struct vm_area_struct *vma)
+{
+	int ret;
+
+	ret = dma_buf_mmap(etnaviv_obj->base.dma_buf, vma, 0);
+	if (!ret) {
+		/* Drop the reference acquired by drm_gem_mmap_obj(). */
+		drm_gem_object_put(&etnaviv_obj->base);
+	}
+
+	return ret;
+}
+
+static const struct etnaviv_gem_ops etnaviv_gem_prime_ops = {
+	/* .get_pages should never be called */
+	.release = etnaviv_gem_prime_release,
+	.vmap = etnaviv_gem_prime_vmap_impl,
+	.mmap = etnaviv_gem_prime_mmap_obj,
+};
+
+struct drm_gem_object *etnaviv_gem_prime_import_sg_table(struct drm_device *dev,
+	struct dma_buf_attachment *attach, struct sg_table *sgt)
+{
+	struct etnaviv_gem_object *etnaviv_obj;
+	size_t size = PAGE_ALIGN(attach->dmabuf->size);
+	int ret, npages;
+
+	ret = etnaviv_gem_new_private(dev, size, ETNA_BO_WC,
+				      &etnaviv_gem_prime_ops, &etnaviv_obj);
+	if (ret < 0)
+		return ERR_PTR(ret);
+
+	lockdep_set_class(&etnaviv_obj->lock, &etnaviv_prime_lock_class);
+
+	npages = size / PAGE_SIZE;
+
+	etnaviv_obj->sgt = sgt;
+	etnaviv_obj->pages = kvmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
+	if (!etnaviv_obj->pages) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	ret = drm_prime_sg_to_page_array(sgt, etnaviv_obj->pages, npages);
+	if (ret)
+		goto fail;
+
+	etnaviv_gem_obj_add(dev, &etnaviv_obj->base);
+
+	return &etnaviv_obj->base;
+
+fail:
+	drm_gem_object_put(&etnaviv_obj->base);
+
+	return ERR_PTR(ret);
+}