Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #ifndef _CAM_MEM_MGR_H_ |
| 14 | #define _CAM_MEM_MGR_H_ |
| 15 | |
Jing Zhou | 6b7522c | 2017-05-08 23:42:09 -0700 | [diff] [blame] | 16 | #include <linux/mutex.h> |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 17 | #include <linux/dma-buf.h> |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 18 | #include <media/cam_req_mgr.h> |
| 19 | #include "cam_mem_mgr_api.h" |
| 20 | |
| 21 | #define CAM_MEM_BUFQ_MAX 1024 |
| 22 | |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 23 | /*Enum for possible SMMU operations */ |
| 24 | enum cam_smmu_mapping_client { |
| 25 | CAM_SMMU_MAPPING_USER, |
| 26 | CAM_SMMU_MAPPING_KERNEL, |
| 27 | }; |
| 28 | |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 29 | /** |
| 30 | * struct cam_mem_buf_queue |
| 31 | * |
| 32 | * @i_hdl: ion handle for the buffer |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 33 | * @dma_buf: pointer to the allocated dma_buf in the table |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 34 | * @q_lock: mutex lock for buffer |
| 35 | * @hdls: list of mapped handles |
| 36 | * @num_hdl: number of handles |
| 37 | * @fd: file descriptor of buffer |
| 38 | * @buf_handle: unique handle for buffer |
| 39 | * @align: alignment for allocation |
| 40 | * @len: size of buffer |
| 41 | * @flags: attributes of buffer |
| 42 | * @vaddr: IOVA of buffer |
| 43 | * @kmdvaddr: Kernel virtual address |
| 44 | * @active: state of the buffer |
| 45 | * @is_imported: Flag indicating if buffer is imported from an FD in user space |
| 46 | */ |
| 47 | struct cam_mem_buf_queue { |
| 48 | struct ion_handle *i_hdl; |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 49 | struct dma_buf *dma_buf; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 50 | struct mutex q_lock; |
| 51 | int32_t hdls[CAM_MEM_MMU_MAX_HANDLE]; |
| 52 | int32_t num_hdl; |
| 53 | int32_t fd; |
| 54 | int32_t buf_handle; |
| 55 | int32_t align; |
| 56 | size_t len; |
| 57 | uint32_t flags; |
| 58 | uint64_t vaddr; |
| 59 | uint64_t kmdvaddr; |
| 60 | bool active; |
| 61 | bool is_imported; |
| 62 | }; |
| 63 | |
| 64 | /** |
| 65 | * struct cam_mem_table |
| 66 | * |
| 67 | * @m_lock: mutex lock for table |
| 68 | * @bitmap: bitmap of the mem mgr utility |
| 69 | * @bits: max bits of the utility |
| 70 | * @client: ion client pointer |
| 71 | * @bufq: array of buffers |
| 72 | */ |
| 73 | struct cam_mem_table { |
| 74 | struct mutex m_lock; |
| 75 | void *bitmap; |
| 76 | size_t bits; |
| 77 | struct ion_client *client; |
| 78 | struct cam_mem_buf_queue bufq[CAM_MEM_BUFQ_MAX]; |
| 79 | }; |
| 80 | |
| 81 | /** |
| 82 | * @brief: Allocates and maps buffer |
| 83 | * |
| 84 | * @cmd: Allocation information |
| 85 | * |
| 86 | * @return Status of operation. Negative in case of error. Zero otherwise. |
| 87 | */ |
| 88 | int cam_mem_mgr_alloc_and_map(struct cam_mem_mgr_alloc_cmd *cmd); |
| 89 | |
| 90 | /** |
| 91 | * @brief: Releases a buffer reference |
| 92 | * |
| 93 | * @cmd: Buffer release information |
| 94 | * |
| 95 | * @return Status of operation. Negative in case of error. Zero otherwise. |
| 96 | */ |
| 97 | int cam_mem_mgr_release(struct cam_mem_mgr_release_cmd *cmd); |
| 98 | |
| 99 | /** |
| 100 | * @brief Maps a buffer |
| 101 | * |
| 102 | * @cmd: Buffer mapping information |
| 103 | * |
| 104 | * @return Status of operation. Negative in case of error. Zero otherwise. |
| 105 | */ |
| 106 | int cam_mem_mgr_map(struct cam_mem_mgr_map_cmd *cmd); |
| 107 | |
| 108 | /** |
| 109 | * @brief: Perform cache ops on the buffer |
| 110 | * |
| 111 | * @cmd: Cache ops information |
| 112 | * |
| 113 | * @return Status of operation. Negative in case of error. Zero otherwise. |
| 114 | */ |
| 115 | int cam_mem_mgr_cache_ops(struct cam_mem_cache_ops_cmd *cmd); |
| 116 | |
| 117 | /** |
| 118 | * @brief: Initializes the memory manager |
| 119 | * |
| 120 | * @return Status of operation. Negative in case of error. Zero otherwise. |
| 121 | */ |
| 122 | int cam_mem_mgr_init(void); |
| 123 | |
| 124 | /** |
| 125 | * @brief: Tears down the memory manager |
| 126 | * |
| 127 | * @return None |
| 128 | */ |
| 129 | void cam_mem_mgr_deinit(void); |
| 130 | |
| 131 | #endif /* _CAM_MEM_MGR_H_ */ |