drm/rockchip: Implement mmap as GEM object function

Moving the driver-specific mmap code into a GEM object function allows
for using DRM helpers for various mmap callbacks.

The respective rockchip functions are being removed. The file_operations
structure fops is now being created by the helper macro
DEFINE_DRM_GEM_FOPS().

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
[On rk3288 (pinky), rk3399 (gru-kevin, puma) and rk3328 (rock64)]
Tested-by: Heiko Stuebner <heiko@sntech.de>
[On RK3188/RK3066 (without iommu)]
Tested-by: Alex Bee <knaerzche@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210624095502.8945-1-tzimmermann@suse.de

1 files changed, 11 insertions, 33 deletions

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
index 7971f57436dd..63eb73b624aa 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
@@ -241,11 +241,21 @@ static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
 	struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
 
 	/*
+	 * 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;
+
+	/*
 	 * We allocated a struct page table for rk_obj, so clear
 	 * VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
 	 */
+	vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
 	vma->vm_flags &= ~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);
+
 	if (rk_obj->pages)
 		ret = rockchip_drm_gem_object_mmap_iommu(obj, vma);
 	else
@@ -257,39 +267,6 @@ static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
 	return ret;
 }
 
-int rockchip_gem_mmap_buf(struct drm_gem_object *obj,
-			  struct vm_area_struct *vma)
-{
-	int ret;
-
-	ret = drm_gem_mmap_obj(obj, obj->size, vma);
-	if (ret)
-		return ret;
-
-	return rockchip_drm_gem_object_mmap(obj, vma);
-}
-
-/* drm driver mmap file operations */
-int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma)
-{
-	struct drm_gem_object *obj;
-	int ret;
-
-	ret = drm_gem_mmap(filp, vma);
-	if (ret)
-		return 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;
-
-	obj = vma->vm_private_data;
-
-	return rockchip_drm_gem_object_mmap(obj, vma);
-}
-
 static void rockchip_gem_release_object(struct rockchip_gem_object *rk_obj)
 {
 	drm_gem_object_release(&rk_obj->base);
@@ -301,6 +278,7 @@ static const struct drm_gem_object_funcs rockchip_gem_object_funcs = {
 	.get_sg_table = rockchip_gem_prime_get_sg_table,
 	.vmap = rockchip_gem_prime_vmap,
 	.vunmap	= rockchip_gem_prime_vunmap,
+	.mmap = rockchip_drm_gem_object_mmap,
 	.vm_ops = &drm_gem_cma_vm_ops,
 };