void *rockchip_gem_prime_vmap(struct drm_gem_object *obj)
{
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
if (dma_get_attr(DMA_ATTR_NO_KERNEL_MAPPING, &rk_obj->dma_attrs))
return NULL;
return rk_obj->kvaddr;
}
/*
* rockchip_gem_free_object - (struct drm_driver)->gem_free_object callback
* function
*/
void rockchip_gem_free_object(struct drm_gem_object *obj)
{
struct rockchip_gem_object *rk_obj;
drm_gem_free_mmap_offset(obj);
rk_obj = to_rockchip_obj(obj);
rockchip_gem_free_buf(rk_obj);
kfree(rk_obj);
}
int rockchip_gem_mmap_buf(struct drm_gem_object *obj,
struct vm_area_struct *vma)
{
struct rockchip_gem_object *rk_obj = to_rockchip_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, rk_obj->kvaddr, rk_obj->dma_addr,
obj->size, &rk_obj->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;
}
/*
* 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 *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj)
{
struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
struct drm_device *drm = obj->dev;
struct sg_table *sgt;
int ret;
sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
if (!sgt)
return ERR_PTR(-ENOMEM);
ret = dma_get_sgtable_attrs(drm->dev, sgt, rk_obj->kvaddr,
rk_obj->dma_addr, obj->size,
&rk_obj->dma_attrs);
if (ret) {
DRM_ERROR("failed to allocate sgt, %d\n", ret);
kfree(sgt);
return ERR_PTR(ret);
}
return sgt;
}