// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2015 MediaTek Inc.
+ * Copyright (c) 2025 Collabora Ltd.
+ * AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
*/
#include <linux/dma-buf.h>
static int mtk_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
-static const struct vm_operations_struct vm_ops = {
- .open = drm_gem_vm_open,
- .close = drm_gem_vm_close,
-};
+static void mtk_gem_free_object(struct drm_gem_object *obj)
+{
+ struct drm_gem_dma_object *dma_obj = to_drm_gem_dma_obj(obj);
+ struct mtk_drm_private *priv = obj->dev->dev_private;
+
+ if (dma_obj->sgt)
+ drm_prime_gem_destroy(obj, dma_obj->sgt);
+ else
+ dma_free_wc(priv->dma_dev, dma_obj->base.size,
+ dma_obj->vaddr, dma_obj->dma_addr);
+
+ /* release file pointer to gem object. */
+ drm_gem_object_release(obj);
+
+ kfree(dma_obj);
+}
+
+/*
+ * Allocate a sg_table for this GEM object.
+ * Note: Both the table's contents, and the sg_table itself must be freed by
+ * the caller.
+ * Returns a pointer to the newly allocated sg_table, or an ERR_PTR() error.
+ */
+static struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj)
+{
+ struct drm_gem_dma_object *dma_obj = to_drm_gem_dma_obj(obj);
+ struct mtk_drm_private *priv = obj->dev->dev_private;
+ struct sg_table *sgt;
+ int ret;
+
+ sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
+ if (!sgt)
+ return ERR_PTR(-ENOMEM);
+
+ ret = dma_get_sgtable(priv->dma_dev, sgt, dma_obj->vaddr,
+ dma_obj->dma_addr, obj->size);
+ if (ret) {
+ DRM_ERROR("failed to allocate sgt, %d\n", ret);
+ kfree(sgt);
+ return ERR_PTR(ret);
+ }
+
+ return sgt;
+}
static const struct drm_gem_object_funcs mtk_gem_object_funcs = {
.free = mtk_gem_free_object,
+ .print_info = drm_gem_dma_object_print_info,
.get_sg_table = mtk_gem_prime_get_sg_table,
- .vmap = mtk_gem_prime_vmap,
- .vunmap = mtk_gem_prime_vunmap,
+ .vmap = drm_gem_dma_object_vmap,
.mmap = mtk_gem_object_mmap,
- .vm_ops = &vm_ops,
+ .vm_ops = &drm_gem_dma_vm_ops,
};
-static struct mtk_gem_obj *mtk_gem_init(struct drm_device *dev,
- unsigned long size)
+static struct drm_gem_dma_object *mtk_gem_init(struct drm_device *dev,
+ unsigned long size, bool private)
{
- struct mtk_gem_obj *mtk_gem_obj;
+ struct drm_gem_dma_object *dma_obj;
int ret;
size = round_up(size, PAGE_SIZE);
if (size == 0)
return ERR_PTR(-EINVAL);
- mtk_gem_obj = kzalloc(sizeof(*mtk_gem_obj), GFP_KERNEL);
- if (!mtk_gem_obj)
+ dma_obj = kzalloc(sizeof(*dma_obj), GFP_KERNEL);
+ if (!dma_obj)
return ERR_PTR(-ENOMEM);
- mtk_gem_obj->base.funcs = &mtk_gem_object_funcs;
+ dma_obj->base.funcs = &mtk_gem_object_funcs;
- ret = drm_gem_object_init(dev, &mtk_gem_obj->base, size);
- if (ret < 0) {
+ if (private) {
+ ret = 0;
+ drm_gem_private_object_init(dev, &dma_obj->base, size);
+ } else {
+ ret = drm_gem_object_init(dev, &dma_obj->base, size);
+ }
+ if (ret) {
DRM_ERROR("failed to initialize gem object\n");
- kfree(mtk_gem_obj);
+ kfree(dma_obj);
return ERR_PTR(ret);
}
- return mtk_gem_obj;
+ return dma_obj;
}
-struct mtk_gem_obj *mtk_gem_create(struct drm_device *dev,
- size_t size, bool alloc_kmap)
+static struct drm_gem_dma_object *mtk_gem_create(struct drm_device *dev, size_t size)
{
struct mtk_drm_private *priv = dev->dev_private;
- struct mtk_gem_obj *mtk_gem;
+ struct drm_gem_dma_object *dma_obj;
struct drm_gem_object *obj;
int ret;
- mtk_gem = mtk_gem_init(dev, size);
- if (IS_ERR(mtk_gem))
- return ERR_CAST(mtk_gem);
-
- obj = &mtk_gem->base;
+ dma_obj = mtk_gem_init(dev, size, false);
+ if (IS_ERR(dma_obj))
+ return ERR_CAST(dma_obj);
- mtk_gem->dma_attrs = DMA_ATTR_WRITE_COMBINE;
+ obj = &dma_obj->base;
- if (!alloc_kmap)
- mtk_gem->dma_attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
-
- mtk_gem->cookie = dma_alloc_attrs(priv->dma_dev, obj->size,
- &mtk_gem->dma_addr, GFP_KERNEL,
- mtk_gem->dma_attrs);
- if (!mtk_gem->cookie) {
+ dma_obj->vaddr = dma_alloc_wc(priv->dma_dev, obj->size,
+ &dma_obj->dma_addr,
+ GFP_KERNEL | __GFP_NOWARN);
+ if (!dma_obj->vaddr) {
DRM_ERROR("failed to allocate %zx byte dma buffer", obj->size);
ret = -ENOMEM;
goto err_gem_free;
}
- if (alloc_kmap)
- mtk_gem->kvaddr = mtk_gem->cookie;
-
- DRM_DEBUG_DRIVER("cookie = %p dma_addr = %pad size = %zu\n",
- mtk_gem->cookie, &mtk_gem->dma_addr,
+ DRM_DEBUG_DRIVER("vaddr = %p dma_addr = %pad size = %zu\n",
+ dma_obj->vaddr, &dma_obj->dma_addr,
size);
- return mtk_gem;
+ return dma_obj;
err_gem_free:
drm_gem_object_release(obj);
- kfree(mtk_gem);
+ kfree(dma_obj);
return ERR_PTR(ret);
}
-void mtk_gem_free_object(struct drm_gem_object *obj)
-{
- struct mtk_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
- struct mtk_drm_private *priv = obj->dev->dev_private;
-
- if (mtk_gem->sg)
- drm_prime_gem_destroy(obj, mtk_gem->sg);
- else
- dma_free_attrs(priv->dma_dev, obj->size, mtk_gem->cookie,
- mtk_gem->dma_addr, mtk_gem->dma_attrs);
-
- /* release file pointer to gem object. */
- drm_gem_object_release(obj);
-
- kfree(mtk_gem);
-}
-
int mtk_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
- struct mtk_gem_obj *mtk_gem;
+ struct drm_gem_dma_object *dma_obj;
int ret;
args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
args->size = args->pitch;
args->size *= args->height;
- mtk_gem = mtk_gem_create(dev, args->size, false);
- if (IS_ERR(mtk_gem))
- return PTR_ERR(mtk_gem);
+ dma_obj = mtk_gem_create(dev, args->size);
+ if (IS_ERR(dma_obj))
+ return PTR_ERR(dma_obj);
/*
* allocate a id of idr table where the obj is registered
* and handle has the id what user can see.
*/
- ret = drm_gem_handle_create(file_priv, &mtk_gem->base, &args->handle);
+ ret = drm_gem_handle_create(file_priv, &dma_obj->base, &args->handle);
if (ret)
goto err_handle_create;
/* drop reference from allocate - handle holds it now. */
- drm_gem_object_put(&mtk_gem->base);
+ drm_gem_object_put(&dma_obj->base);
return 0;
err_handle_create:
- mtk_gem_free_object(&mtk_gem->base);
+ mtk_gem_free_object(&dma_obj->base);
return ret;
}
struct vm_area_struct *vma)
{
- int ret;
- struct mtk_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
+ struct drm_gem_dma_object *dma_obj = to_drm_gem_dma_obj(obj);
struct mtk_drm_private *priv = obj->dev->dev_private;
+ int ret;
/*
* Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the
* whole buffer from the start.
*/
- vma->vm_pgoff = 0;
+ vma->vm_pgoff -= drm_vma_node_start(&obj->vma_node);
/*
* dma_alloc_attrs() allocated a struct page table for mtk_gem, so clear
* VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
*/
- vm_flags_set(vma, VM_IO | VM_DONTEXPAND | VM_DONTDUMP);
+ vm_flags_mod(vma, VM_IO | VM_DONTEXPAND | VM_DONTDUMP, VM_PFNMAP);
+
vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
- ret = dma_mmap_attrs(priv->dma_dev, vma, mtk_gem->cookie,
- mtk_gem->dma_addr, obj->size, mtk_gem->dma_attrs);
+ ret = dma_mmap_wc(priv->dma_dev, vma, dma_obj->vaddr,
+ dma_obj->dma_addr, obj->size);
+ if (ret)
+ drm_gem_vm_close(vma);
return ret;
}
-/*
- * Allocate a sg_table for this GEM object.
- * Note: Both the table's contents, and the sg_table itself must be freed by
- * the caller.
- * Returns a pointer to the newly allocated sg_table, or an ERR_PTR() error.
- */
-struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj)
-{
- struct mtk_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
- struct mtk_drm_private *priv = obj->dev->dev_private;
- struct sg_table *sgt;
- int ret;
-
- sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
- if (!sgt)
- return ERR_PTR(-ENOMEM);
-
- ret = dma_get_sgtable_attrs(priv->dma_dev, sgt, mtk_gem->cookie,
- mtk_gem->dma_addr, obj->size,
- mtk_gem->dma_attrs);
- if (ret) {
- DRM_ERROR("failed to allocate sgt, %d\n", ret);
- kfree(sgt);
- return ERR_PTR(ret);
- }
-
- return sgt;
-}
-
struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev,
- struct dma_buf_attachment *attach, struct sg_table *sg)
+ struct dma_buf_attachment *attach, struct sg_table *sgt)
{
- struct mtk_gem_obj *mtk_gem;
+ struct drm_gem_dma_object *dma_obj;
/* check if the entries in the sg_table are contiguous */
- if (drm_prime_get_contiguous_size(sg) < attach->dmabuf->size) {
+ if (drm_prime_get_contiguous_size(sgt) < attach->dmabuf->size) {
DRM_ERROR("sg_table is not contiguous");
return ERR_PTR(-EINVAL);
}
- mtk_gem = mtk_gem_init(dev, attach->dmabuf->size);
- if (IS_ERR(mtk_gem))
- return ERR_CAST(mtk_gem);
-
- mtk_gem->dma_addr = sg_dma_address(sg->sgl);
- mtk_gem->sg = sg;
-
- return &mtk_gem->base;
-}
-
-int mtk_gem_prime_vmap(struct drm_gem_object *obj, struct iosys_map *map)
-{
- struct mtk_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
- struct sg_table *sgt = NULL;
- unsigned int npages;
-
- if (mtk_gem->kvaddr)
- goto out;
-
- sgt = mtk_gem_prime_get_sg_table(obj);
- if (IS_ERR(sgt))
- return PTR_ERR(sgt);
-
- npages = obj->size >> PAGE_SHIFT;
- mtk_gem->pages = kcalloc(npages, sizeof(*mtk_gem->pages), GFP_KERNEL);
- if (!mtk_gem->pages) {
- sg_free_table(sgt);
- kfree(sgt);
- return -ENOMEM;
- }
-
- drm_prime_sg_to_page_array(sgt, mtk_gem->pages, npages);
-
- mtk_gem->kvaddr = vmap(mtk_gem->pages, npages, VM_MAP,
- pgprot_writecombine(PAGE_KERNEL));
- if (!mtk_gem->kvaddr) {
- sg_free_table(sgt);
- kfree(sgt);
- kfree(mtk_gem->pages);
- return -ENOMEM;
- }
- sg_free_table(sgt);
- kfree(sgt);
-
-out:
- iosys_map_set_vaddr(map, mtk_gem->kvaddr);
-
- return 0;
-}
-
-void mtk_gem_prime_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
-{
- struct mtk_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
- void *vaddr = map->vaddr;
+ dma_obj = mtk_gem_init(dev, attach->dmabuf->size, true);
+ if (IS_ERR(dma_obj))
+ return ERR_CAST(dma_obj);
- if (!mtk_gem->pages)
- return;
+ dma_obj->dma_addr = sg_dma_address(sgt->sgl);
+ dma_obj->sgt = sgt;
- vunmap(vaddr);
- mtk_gem->kvaddr = NULL;
- kfree(mtk_gem->pages);
+ return &dma_obj->base;
}
projects / thirdparty / kernel / linux.git / commitdiff
