diff options
Diffstat (limited to 'common/include/linux/memory_group_manager.h')
| -rw-r--r-- | common/include/linux/memory_group_manager.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/common/include/linux/memory_group_manager.h b/common/include/linux/memory_group_manager.h index efa35f5..b0609df 100644 --- a/common/include/linux/memory_group_manager.h +++ b/common/include/linux/memory_group_manager.h @@ -43,6 +43,8 @@ struct memory_group_manager_import_data; * @mgm_free_page: Callback to free physical memory in a group * @mgm_get_import_memory_id: Callback to get the group ID for imported memory * @mgm_update_gpu_pte: Callback to modify a GPU page table entry + * @mgm_pte_to_original_pte: Callback to get the original PTE entry as given + * to mgm_update_gpu_pte * @mgm_vmf_insert_pfn_prot: Callback to map a physical memory page for the CPU */ struct memory_group_manager_ops { @@ -128,6 +130,27 @@ struct memory_group_manager_ops { int group_id, int mmu_level, u64 pte); /* + * mgm_pte_to_original_pte - Undo any modification done during mgm_update_gpu_pte() + * + * @mgm_dev: The memory group manager through which the request + * is being made. + * @group_id: A physical memory group ID. The meaning of this is + * defined by the systems integrator. Its valid range is + * 0 .. MEMORY_GROUP_MANAGER_NR_GROUPS-1. + * @mmu_level: The level of the page table entry in @ate. + * @pte: The page table entry to restore the original representation for, + * in LPAE or AArch64 format (depending on the driver's configuration). + * + * Undo any modifications done during mgm_update_gpu_pte(). + * This function allows getting back the original PTE entry as given + * to mgm_update_gpu_pte(). + * + * Return: PTE entry as originally specified to mgm_update_gpu_pte() + */ + u64 (*mgm_pte_to_original_pte)(struct memory_group_manager_device *mgm_dev, int group_id, + int mmu_level, u64 pte); + + /* * mgm_vmf_insert_pfn_prot - Map a physical page in a group for the CPU * * @mgm_dev: The memory group manager through which the request |