| /* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #ifndef _CAM_MEM_MGR_API_H_ |
| #define _CAM_MEM_MGR_API_H_ |
| |
| #include <media/cam_req_mgr.h> |
| #include "cam_smmu_api.h" |
| |
| /** |
| * struct cam_mem_mgr_request_desc |
| * |
| * @size : Size of memory requested for allocation |
| * @align : Alignment of requested memory |
| * @smmu_hdl: SMMU handle to identify context bank where memory will be mapped |
| * @flags : Flags to indicate cached/uncached property |
| * @region : Region where memory should be allocated |
| */ |
| struct cam_mem_mgr_request_desc { |
| uint64_t size; |
| uint64_t align; |
| int32_t smmu_hdl; |
| uint32_t flags; |
| }; |
| |
| /** |
| * struct cam_mem_mgr_memory_desc |
| * |
| * @kva : Kernel virtual address of allocated memory |
| * @iova : IOVA of allocated memory |
| * @smmu_hdl : SMMU handle of allocated memory |
| * @mem_handle : Mem handle identifying allocated memory |
| * @len : Length of allocated memory |
| * @region : Region to which allocated memory belongs |
| */ |
| struct cam_mem_mgr_memory_desc { |
| uint64_t kva; |
| uint32_t iova; |
| int32_t smmu_hdl; |
| uint32_t mem_handle; |
| uint64_t len; |
| enum cam_smmu_region_id region; |
| }; |
| |
| /** |
| * @brief: Requests a memory buffer |
| * |
| * @inp: Information specifying requested buffer properties |
| * @out: Information about allocated buffer |
| * |
| * @return Status of operation. Negative in case of error. Zero otherwise. |
| */ |
| int cam_mem_mgr_request_mem(struct cam_mem_mgr_request_desc *inp, |
| struct cam_mem_mgr_memory_desc *out); |
| |
| /** |
| * @brief: Releases a memory buffer |
| * |
| * @inp: Information specifying buffer to be released |
| * |
| * @return Status of operation. Negative in case of error. Zero otherwise. |
| */ |
| int cam_mem_mgr_release_mem(struct cam_mem_mgr_memory_desc *inp); |
| |
| /** |
| * @brief: Returns IOVA information about buffer |
| * |
| * @buf_handle: Handle of the buffer |
| * @mmu_handle: SMMU handle where buffer is mapped |
| * @iova_ptr : Pointer to mmu's iova |
| * @len_ptr : Length of the buffer |
| * |
| * @return Status of operation. Negative in case of error. Zero otherwise. |
| */ |
| int cam_mem_get_io_buf(int32_t buf_handle, int32_t mmu_handle, |
| uint64_t *iova_ptr, size_t *len_ptr); |
| /** |
| * @brief: Returns CPU address information about buffer |
| * |
| * @buf_handle: Handle for the buffer |
| * @vaddr_ptr : pointer to kernel virtual address |
| * @len_ptr : Length of the buffer |
| * |
| * @return Status of operation. Negative in case of error. Zero otherwise. |
| */ |
| int cam_mem_get_cpu_buf(int32_t buf_handle, uint64_t *vaddr_ptr, |
| size_t *len); |
| |
| #endif /* _CAM_MEM_MGR_API_H_ */ |