+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2015 MediaTek Inc.
- */
-
-#include <linux/dma-buf.h>
-
-#include <drm/drm.h>
-#include <drm/drm_device.h>
-#include <drm/drm_gem.h>
-#include <drm/drm_gem_dma_helper.h>
-#include <drm/drm_prime.h>
-
-#include "mtk_drm_drv.h"
-#include "mtk_gem.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 const struct drm_gem_object_funcs mtk_gem_object_funcs = {
- .free = mtk_gem_free_object,
- .get_sg_table = mtk_gem_prime_get_sg_table,
- .vmap = mtk_gem_prime_vmap,
- .vunmap = mtk_gem_prime_vunmap,
- .mmap = mtk_gem_object_mmap,
- .vm_ops = &vm_ops,
-};
-
-static struct mtk_gem_obj *mtk_gem_init(struct drm_device *dev,
- unsigned long size)
-{
- struct mtk_gem_obj *mtk_gem_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)
- return ERR_PTR(-ENOMEM);
-
- mtk_gem_obj->base.funcs = &mtk_gem_object_funcs;
-
- ret = drm_gem_object_init(dev, &mtk_gem_obj->base, size);
- if (ret < 0) {
- DRM_ERROR("failed to initialize gem object\n");
- kfree(mtk_gem_obj);
- return ERR_PTR(ret);
- }
-
- return mtk_gem_obj;
-}
-
-struct mtk_gem_obj *mtk_gem_create(struct drm_device *dev,
- size_t size, bool alloc_kmap)
-{
- struct mtk_drm_private *priv = dev->dev_private;
- struct mtk_gem_obj *mtk_gem;
- 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;
-
- mtk_gem->dma_attrs = DMA_ATTR_WRITE_COMBINE;
-
- 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) {
- 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,
- size);
-
- return mtk_gem;
-
-err_gem_free:
- drm_gem_object_release(obj);
- kfree(mtk_gem);
- 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;
- int ret;
-
- args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
-
- /*
- * Multiply 2 variables of different types,
- * for example: args->size = args->spacing * args->height;
- * may cause coverity issue with unintentional overflow.
- */
- 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);
-
- /*
- * 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);
- if (ret)
- goto err_handle_create;
-
- /* drop reference from allocate - handle holds it now. */
- drm_gem_object_put(&mtk_gem->base);
-
- return 0;
-
-err_handle_create:
- mtk_gem_free_object(&mtk_gem->base);
- return ret;
-}
-
-static int mtk_gem_object_mmap(struct drm_gem_object *obj,
- struct vm_area_struct *vma)
-
-{
- int ret;
- struct mtk_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
- struct mtk_drm_private *priv = obj->dev->dev_private;
-
- /*
- * 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;
-
- /*
- * 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);
- 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);
-
- 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 mtk_gem_obj *mtk_gem;
-
- /* check if the entries in the sg_table are contiguous */
- if (drm_prime_get_contiguous_size(sg) < 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;
-
- if (!mtk_gem->pages)
- return;
-
- vunmap(vaddr);
- mtk_gem->kvaddr = NULL;
- kfree(mtk_gem->pages);
-}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ */
+
+#include <linux/dma-buf.h>
+
+#include <drm/drm.h>
+#include <drm/drm_device.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_prime.h>
+
+#include "mtk_drm_drv.h"
+#include "mtk_gem.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 const struct drm_gem_object_funcs mtk_gem_object_funcs = {
+ .free = mtk_gem_free_object,
+ .get_sg_table = mtk_gem_prime_get_sg_table,
+ .vmap = mtk_gem_prime_vmap,
+ .vunmap = mtk_gem_prime_vunmap,
+ .mmap = mtk_gem_object_mmap,
+ .vm_ops = &vm_ops,
+};
+
+static struct mtk_gem_obj *mtk_gem_init(struct drm_device *dev,
+ unsigned long size)
+{
+ struct mtk_gem_obj *mtk_gem_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)
+ return ERR_PTR(-ENOMEM);
+
+ mtk_gem_obj->base.funcs = &mtk_gem_object_funcs;
+
+ ret = drm_gem_object_init(dev, &mtk_gem_obj->base, size);
+ if (ret < 0) {
+ DRM_ERROR("failed to initialize gem object\n");
+ kfree(mtk_gem_obj);
+ return ERR_PTR(ret);
+ }
+
+ return mtk_gem_obj;
+}
+
+struct mtk_gem_obj *mtk_gem_create(struct drm_device *dev,
+ size_t size, bool alloc_kmap)
+{
+ struct mtk_drm_private *priv = dev->dev_private;
+ struct mtk_gem_obj *mtk_gem;
+ 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;
+
+ mtk_gem->dma_attrs = DMA_ATTR_WRITE_COMBINE;
+
+ 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) {
+ 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,
+ size);
+
+ return mtk_gem;
+
+err_gem_free:
+ drm_gem_object_release(obj);
+ kfree(mtk_gem);
+ 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;
+ int ret;
+
+ args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
+
+ /*
+ * Multiply 2 variables of different types,
+ * for example: args->size = args->spacing * args->height;
+ * may cause coverity issue with unintentional overflow.
+ */
+ 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);
+
+ /*
+ * 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);
+ if (ret)
+ goto err_handle_create;
+
+ /* drop reference from allocate - handle holds it now. */
+ drm_gem_object_put(&mtk_gem->base);
+
+ return 0;
+
+err_handle_create:
+ mtk_gem_free_object(&mtk_gem->base);
+ return ret;
+}
+
+static int mtk_gem_object_mmap(struct drm_gem_object *obj,
+ struct vm_area_struct *vma)
+
+{
+ int ret;
+ struct mtk_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
+ struct mtk_drm_private *priv = obj->dev->dev_private;
+
+ /*
+ * 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;
+
+ /*
+ * 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);
+ 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);
+
+ 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 mtk_gem_obj *mtk_gem;
+
+ /* check if the entries in the sg_table are contiguous */
+ if (drm_prime_get_contiguous_size(sg) < 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;
+
+ if (!mtk_gem->pages)
+ return;
+
+ vunmap(vaddr);
+ mtk_gem->kvaddr = NULL;
+ kfree(mtk_gem->pages);
+}
projects / linux.git / commitdiff