Adding upstream version 6.1.76.upstream/6.1.76upstream

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

1 files changed, 158 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_gem_ttm_helper.c b/drivers/gpu/drm/drm_gem_ttm_helper.c
new file mode 100644
index 000000000..e5fc87599
--- /dev/null
+++ b/drivers/gpu/drm/drm_gem_ttm_helper.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <linux/module.h>
+
+#include <drm/drm_gem_ttm_helper.h>
+
+/**
+ * DOC: overview
+ *
+ * This library provides helper functions for gem objects backed by
+ * ttm.
+ */
+
+/**
+ * drm_gem_ttm_print_info() - Print &ttm_buffer_object info for debugfs
+ * @p: DRM printer
+ * @indent: Tab indentation level
+ * @gem: GEM object
+ *
+ * This function can be used as &drm_gem_object_funcs.print_info
+ * callback.
+ */
+void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
+			    const struct drm_gem_object *gem)
+{
+	static const char * const plname[] = {
+		[ TTM_PL_SYSTEM ] = "system",
+		[ TTM_PL_TT     ] = "tt",
+		[ TTM_PL_VRAM   ] = "vram",
+		[ TTM_PL_PRIV   ] = "priv",
+
+		[ 16 ]            = "cached",
+		[ 17 ]            = "uncached",
+		[ 18 ]            = "wc",
+		[ 19 ]            = "contig",
+
+		[ 21 ]            = "pinned", /* NO_EVICT */
+		[ 22 ]            = "topdown",
+	};
+	const struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
+
+	drm_printf_indent(p, indent, "placement=");
+	drm_print_bits(p, bo->resource->placement, plname, ARRAY_SIZE(plname));
+	drm_printf(p, "\n");
+
+	if (bo->resource->bus.is_iomem)
+		drm_printf_indent(p, indent, "bus.offset=%lx\n",
+				  (unsigned long)bo->resource->bus.offset);
+}
+EXPORT_SYMBOL(drm_gem_ttm_print_info);
+
+/**
+ * drm_gem_ttm_vmap() - vmap &ttm_buffer_object
+ * @gem: GEM object.
+ * @map: [out] returns the dma-buf mapping.
+ *
+ * Maps a GEM object with ttm_bo_vmap(). This function can be used as
+ * &drm_gem_object_funcs.vmap callback.
+ *
+ * Returns:
+ * 0 on success, or a negative errno code otherwise.
+ */
+int drm_gem_ttm_vmap(struct drm_gem_object *gem,
+		     struct iosys_map *map)
+{
+	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
+	int ret;
+
+	dma_resv_lock(gem->resv, NULL);
+	ret = ttm_bo_vmap(bo, map);
+	dma_resv_unlock(gem->resv);
+
+	return ret;
+}
+EXPORT_SYMBOL(drm_gem_ttm_vmap);
+
+/**
+ * drm_gem_ttm_vunmap() - vunmap &ttm_buffer_object
+ * @gem: GEM object.
+ * @map: dma-buf mapping.
+ *
+ * Unmaps a GEM object with ttm_bo_vunmap(). This function can be used as
+ * &drm_gem_object_funcs.vmap callback.
+ */
+void drm_gem_ttm_vunmap(struct drm_gem_object *gem,
+			struct iosys_map *map)
+{
+	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
+
+	dma_resv_lock(gem->resv, NULL);
+	ttm_bo_vunmap(bo, map);
+	dma_resv_unlock(gem->resv);
+}
+EXPORT_SYMBOL(drm_gem_ttm_vunmap);
+
+/**
+ * drm_gem_ttm_mmap() - mmap &ttm_buffer_object
+ * @gem: GEM object.
+ * @vma: vm area.
+ *
+ * This function can be used as &drm_gem_object_funcs.mmap
+ * callback.
+ */
+int drm_gem_ttm_mmap(struct drm_gem_object *gem,
+		     struct vm_area_struct *vma)
+{
+	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
+	int ret;
+
+	ret = ttm_bo_mmap_obj(vma, bo);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * ttm has its own object refcounting, so drop gem reference
+	 * to avoid double accounting counting.
+	 */
+	drm_gem_object_put(gem);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_gem_ttm_mmap);
+
+/**
+ * drm_gem_ttm_dumb_map_offset() - Implements struct &drm_driver.dumb_map_offset
+ * @file:	DRM file pointer.
+ * @dev:	DRM device.
+ * @handle:	GEM handle
+ * @offset:	Returns the mapping's memory offset on success
+ *
+ * Provides an implementation of struct &drm_driver.dumb_map_offset for
+ * TTM-based GEM drivers. TTM allocates the offset internally and
+ * drm_gem_ttm_dumb_map_offset() returns it for dumb-buffer implementations.
+ *
+ * See struct &drm_driver.dumb_map_offset.
+ *
+ * Returns:
+ * 0 on success, or a negative errno code otherwise.
+ */
+int drm_gem_ttm_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
+				uint32_t handle, uint64_t *offset)
+{
+	struct drm_gem_object *gem;
+
+	gem = drm_gem_object_lookup(file, handle);
+	if (!gem)
+		return -ENOENT;
+
+	*offset = drm_vma_node_offset_addr(&gem->vma_node);
+
+	drm_gem_object_put(gem);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_gem_ttm_dumb_map_offset);
+
+MODULE_DESCRIPTION("DRM gem ttm helpers");
+MODULE_LICENSE("GPL");