static int rockchip_drm_fb_mmap(struct fb_info *info,
struct vm_area_struct *vma)
{
struct drm_fb_helper *helper = info->par;
struct rockchip_drm_fbdev *rockchip_fbd = to_rockchip_fbdev(helper);
struct rockchip_drm_gem_obj *rockchip_gem_obj = rockchip_fbd->rockchip_gem_obj;
struct rockchip_drm_gem_buf *buffer = rockchip_gem_obj->buffer;
unsigned long vm_size;
int ret;
DRM_DEBUG_KMS("%s\n", __func__);
vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
vm_size = vma->vm_end - vma->vm_start;
if (vm_size > buffer->size)
return -EINVAL;
ret = dma_mmap_attrs(helper->dev->dev, vma, buffer->pages,
buffer->dma_addr, buffer->size, &buffer->dma_attrs);
if (ret < 0) {
DRM_ERROR("failed to mmap.\n");
return ret;
}
return 0;
}
int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj,
struct vm_area_struct *vma)
{
struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
struct drm_device *drm = obj->dev;
unsigned long vm_size;
vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
vm_size = vma->vm_end - vma->vm_start;
if (vm_size > obj->size)
return -EINVAL;
return dma_mmap_attrs(drm->dev, vma, mtk_gem->kvaddr, mtk_gem->dma_addr,
obj->size, &mtk_gem->dma_attrs);
}
static int rockchip_drm_gem_object_mmap(struct drm_gem_object *obj,
struct vm_area_struct *vma)
{
int ret;
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
struct drm_device *drm = obj->dev;
/*
* dma_alloc_attrs() 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_PFNMAP;
ret = dma_mmap_attrs(drm->dev, vma, rk_obj->kvaddr, rk_obj->dma_addr,
obj->size, &rk_obj->dma_attrs);
if (ret)
drm_gem_vm_close(vma);
return ret;
}
