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 | |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 13 | #include <linux/module.h> |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/mutex.h> |
| 16 | #include <linux/msm_ion.h> |
Patrick Daly | de1c64d | 2017-09-12 16:30:12 -0700 | [diff] [blame] | 17 | #include <linux/slab.h> |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 18 | #include <asm/cacheflush.h> |
| 19 | |
| 20 | #include "cam_req_mgr_util.h" |
| 21 | #include "cam_mem_mgr.h" |
| 22 | #include "cam_smmu_api.h" |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 23 | #include "cam_debug_util.h" |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 24 | |
| 25 | static struct cam_mem_table tbl; |
| 26 | |
| 27 | static int cam_mem_util_map_cpu_va(struct ion_handle *hdl, |
| 28 | uint64_t *vaddr, |
| 29 | size_t *len) |
| 30 | { |
| 31 | *vaddr = (uintptr_t)ion_map_kernel(tbl.client, hdl); |
| 32 | if (IS_ERR_OR_NULL((void *)*vaddr)) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 33 | CAM_ERR(CAM_CRM, "kernel map fail"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 34 | return -ENOSPC; |
| 35 | } |
| 36 | |
| 37 | if (ion_handle_get_size(tbl.client, hdl, len)) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 38 | CAM_ERR(CAM_CRM, "kernel get len failed"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 39 | ion_unmap_kernel(tbl.client, hdl); |
| 40 | return -ENOSPC; |
| 41 | } |
| 42 | |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | static int cam_mem_util_get_dma_dir(uint32_t flags) |
| 47 | { |
| 48 | int rc = -EINVAL; |
| 49 | |
| 50 | if (flags & CAM_MEM_FLAG_HW_READ_ONLY) |
| 51 | rc = DMA_TO_DEVICE; |
| 52 | else if (flags & CAM_MEM_FLAG_HW_WRITE_ONLY) |
| 53 | rc = DMA_FROM_DEVICE; |
| 54 | else if (flags & CAM_MEM_FLAG_HW_READ_WRITE) |
| 55 | rc = DMA_BIDIRECTIONAL; |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 56 | else if (flags & CAM_MEM_FLAG_PROTECTED_MODE) |
| 57 | rc = DMA_BIDIRECTIONAL; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 58 | |
| 59 | return rc; |
| 60 | } |
| 61 | |
| 62 | static int cam_mem_util_client_create(void) |
| 63 | { |
| 64 | int rc = 0; |
| 65 | |
| 66 | tbl.client = msm_ion_client_create("camera_global_pool"); |
| 67 | if (IS_ERR_OR_NULL(tbl.client)) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 68 | CAM_ERR(CAM_CRM, "fail to create client"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 69 | rc = -EINVAL; |
| 70 | } |
| 71 | |
| 72 | return rc; |
| 73 | } |
| 74 | |
| 75 | static void cam_mem_util_client_destroy(void) |
| 76 | { |
| 77 | ion_client_destroy(tbl.client); |
| 78 | tbl.client = NULL; |
| 79 | } |
| 80 | |
| 81 | int cam_mem_mgr_init(void) |
| 82 | { |
| 83 | int rc; |
| 84 | int i; |
| 85 | int bitmap_size; |
| 86 | |
| 87 | memset(tbl.bufq, 0, sizeof(tbl.bufq)); |
| 88 | |
| 89 | rc = cam_mem_util_client_create(); |
| 90 | if (rc < 0) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 91 | CAM_ERR(CAM_CRM, "fail to create ion client"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 92 | goto client_fail; |
| 93 | } |
| 94 | |
| 95 | bitmap_size = BITS_TO_LONGS(CAM_MEM_BUFQ_MAX) * sizeof(long); |
Seemanta Dutta | 53b1090 | 2017-05-09 15:07:01 -0700 | [diff] [blame] | 96 | tbl.bitmap = kzalloc(bitmap_size, GFP_KERNEL); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 97 | if (!tbl.bitmap) { |
| 98 | rc = -ENOMEM; |
| 99 | goto bitmap_fail; |
| 100 | } |
| 101 | tbl.bits = bitmap_size * BITS_PER_BYTE; |
| 102 | bitmap_zero(tbl.bitmap, tbl.bits); |
| 103 | /* We need to reserve slot 0 because 0 is invalid */ |
| 104 | set_bit(0, tbl.bitmap); |
| 105 | |
| 106 | for (i = 1; i < CAM_MEM_BUFQ_MAX; i++) { |
| 107 | tbl.bufq[i].fd = -1; |
| 108 | tbl.bufq[i].buf_handle = -1; |
| 109 | } |
| 110 | mutex_init(&tbl.m_lock); |
| 111 | return rc; |
| 112 | |
| 113 | bitmap_fail: |
| 114 | cam_mem_util_client_destroy(); |
| 115 | client_fail: |
| 116 | return rc; |
| 117 | } |
| 118 | |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 119 | static int32_t cam_mem_get_slot(void) |
| 120 | { |
| 121 | int32_t idx; |
| 122 | |
| 123 | mutex_lock(&tbl.m_lock); |
| 124 | idx = find_first_zero_bit(tbl.bitmap, tbl.bits); |
| 125 | if (idx >= CAM_MEM_BUFQ_MAX || idx <= 0) { |
| 126 | mutex_unlock(&tbl.m_lock); |
| 127 | return -ENOMEM; |
| 128 | } |
| 129 | |
| 130 | set_bit(idx, tbl.bitmap); |
| 131 | tbl.bufq[idx].active = true; |
| 132 | mutex_init(&tbl.bufq[idx].q_lock); |
| 133 | mutex_unlock(&tbl.m_lock); |
| 134 | |
| 135 | return idx; |
| 136 | } |
| 137 | |
| 138 | static void cam_mem_put_slot(int32_t idx) |
| 139 | { |
| 140 | mutex_lock(&tbl.m_lock); |
| 141 | mutex_lock(&tbl.bufq[idx].q_lock); |
| 142 | tbl.bufq[idx].active = false; |
| 143 | mutex_unlock(&tbl.bufq[idx].q_lock); |
| 144 | mutex_destroy(&tbl.bufq[idx].q_lock); |
| 145 | clear_bit(idx, tbl.bitmap); |
| 146 | mutex_unlock(&tbl.m_lock); |
| 147 | } |
| 148 | |
| 149 | int cam_mem_get_io_buf(int32_t buf_handle, int32_t mmu_handle, |
| 150 | uint64_t *iova_ptr, size_t *len_ptr) |
| 151 | { |
| 152 | int rc = 0, idx; |
| 153 | |
| 154 | idx = CAM_MEM_MGR_GET_HDL_IDX(buf_handle); |
| 155 | if (idx >= CAM_MEM_BUFQ_MAX || idx <= 0) |
| 156 | return -EINVAL; |
| 157 | |
| 158 | if (!tbl.bufq[idx].active) |
| 159 | return -EINVAL; |
| 160 | |
| 161 | mutex_lock(&tbl.bufq[idx].q_lock); |
| 162 | if (buf_handle != tbl.bufq[idx].buf_handle) { |
| 163 | rc = -EINVAL; |
| 164 | goto handle_mismatch; |
| 165 | } |
| 166 | |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 167 | if (CAM_MEM_MGR_IS_SECURE_HDL(buf_handle)) |
| 168 | rc = cam_smmu_get_stage2_iova(mmu_handle, |
| 169 | tbl.bufq[idx].fd, |
| 170 | iova_ptr, |
| 171 | len_ptr); |
| 172 | else |
| 173 | rc = cam_smmu_get_iova(mmu_handle, |
| 174 | tbl.bufq[idx].fd, |
| 175 | iova_ptr, |
| 176 | len_ptr); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 177 | if (rc < 0) |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 178 | CAM_ERR(CAM_CRM, "fail to get buf hdl :%d", buf_handle); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 179 | |
| 180 | handle_mismatch: |
| 181 | mutex_unlock(&tbl.bufq[idx].q_lock); |
| 182 | return rc; |
| 183 | } |
| 184 | EXPORT_SYMBOL(cam_mem_get_io_buf); |
| 185 | |
| 186 | int cam_mem_get_cpu_buf(int32_t buf_handle, uint64_t *vaddr_ptr, size_t *len) |
| 187 | { |
| 188 | int rc = 0; |
| 189 | int idx; |
| 190 | struct ion_handle *ion_hdl = NULL; |
| 191 | uint64_t kvaddr = 0; |
| 192 | size_t klen = 0; |
| 193 | |
| 194 | if (!buf_handle || !vaddr_ptr || !len) |
| 195 | return -EINVAL; |
| 196 | |
| 197 | idx = CAM_MEM_MGR_GET_HDL_IDX(buf_handle); |
| 198 | if (idx >= CAM_MEM_BUFQ_MAX || idx <= 0) |
| 199 | return -EINVAL; |
| 200 | |
| 201 | if (!tbl.bufq[idx].active) |
| 202 | return -EPERM; |
| 203 | |
| 204 | mutex_lock(&tbl.bufq[idx].q_lock); |
| 205 | if (buf_handle != tbl.bufq[idx].buf_handle) { |
| 206 | rc = -EINVAL; |
| 207 | goto exit_func; |
| 208 | } |
| 209 | |
| 210 | ion_hdl = tbl.bufq[idx].i_hdl; |
| 211 | if (!ion_hdl) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 212 | CAM_ERR(CAM_CRM, "Invalid ION handle"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 213 | rc = -EINVAL; |
| 214 | goto exit_func; |
| 215 | } |
| 216 | |
| 217 | if (tbl.bufq[idx].flags & CAM_MEM_FLAG_KMD_ACCESS) { |
| 218 | if (!tbl.bufq[idx].kmdvaddr) { |
| 219 | rc = cam_mem_util_map_cpu_va(ion_hdl, |
| 220 | &kvaddr, &klen); |
| 221 | if (rc) |
| 222 | goto exit_func; |
| 223 | tbl.bufq[idx].kmdvaddr = kvaddr; |
| 224 | } |
| 225 | } else { |
| 226 | rc = -EINVAL; |
| 227 | goto exit_func; |
| 228 | } |
| 229 | |
| 230 | *vaddr_ptr = tbl.bufq[idx].kmdvaddr; |
| 231 | *len = tbl.bufq[idx].len; |
| 232 | |
| 233 | exit_func: |
| 234 | mutex_unlock(&tbl.bufq[idx].q_lock); |
| 235 | return rc; |
| 236 | } |
| 237 | EXPORT_SYMBOL(cam_mem_get_cpu_buf); |
| 238 | |
| 239 | int cam_mem_mgr_cache_ops(struct cam_mem_cache_ops_cmd *cmd) |
| 240 | { |
| 241 | int rc = 0, idx; |
| 242 | uint32_t ion_cache_ops; |
| 243 | unsigned long ion_flag = 0; |
| 244 | |
| 245 | if (!cmd) |
| 246 | return -EINVAL; |
| 247 | |
| 248 | idx = CAM_MEM_MGR_GET_HDL_IDX(cmd->buf_handle); |
| 249 | if (idx >= CAM_MEM_BUFQ_MAX || idx <= 0) |
| 250 | return -EINVAL; |
| 251 | |
| 252 | mutex_lock(&tbl.bufq[idx].q_lock); |
| 253 | |
| 254 | if (!tbl.bufq[idx].active) { |
| 255 | rc = -EINVAL; |
| 256 | goto fail; |
| 257 | } |
| 258 | |
| 259 | if (cmd->buf_handle != tbl.bufq[idx].buf_handle) { |
| 260 | rc = -EINVAL; |
| 261 | goto fail; |
| 262 | } |
| 263 | |
| 264 | rc = ion_handle_get_flags(tbl.client, tbl.bufq[idx].i_hdl, |
| 265 | &ion_flag); |
| 266 | if (rc) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 267 | CAM_ERR(CAM_CRM, "cache get flags failed %d", rc); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 268 | goto fail; |
| 269 | } |
| 270 | |
| 271 | if (ION_IS_CACHED(ion_flag)) { |
| 272 | switch (cmd->mem_cache_ops) { |
| 273 | case CAM_MEM_CLEAN_CACHE: |
| 274 | ion_cache_ops = ION_IOC_CLEAN_CACHES; |
| 275 | break; |
| 276 | case CAM_MEM_INV_CACHE: |
| 277 | ion_cache_ops = ION_IOC_INV_CACHES; |
| 278 | break; |
| 279 | case CAM_MEM_CLEAN_INV_CACHE: |
| 280 | ion_cache_ops = ION_IOC_CLEAN_INV_CACHES; |
| 281 | break; |
| 282 | default: |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 283 | CAM_ERR(CAM_CRM, |
| 284 | "invalid cache ops :%d", cmd->mem_cache_ops); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 285 | rc = -EINVAL; |
| 286 | goto fail; |
| 287 | } |
| 288 | |
| 289 | rc = msm_ion_do_cache_op(tbl.client, |
| 290 | tbl.bufq[idx].i_hdl, |
| 291 | (void *)tbl.bufq[idx].vaddr, |
| 292 | tbl.bufq[idx].len, |
| 293 | ion_cache_ops); |
| 294 | if (rc) |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 295 | CAM_ERR(CAM_CRM, "cache operation failed %d", rc); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 296 | } |
| 297 | fail: |
| 298 | mutex_unlock(&tbl.bufq[idx].q_lock); |
| 299 | return rc; |
| 300 | } |
| 301 | EXPORT_SYMBOL(cam_mem_mgr_cache_ops); |
| 302 | |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 303 | static int cam_mem_util_get_dma_buf(size_t len, |
| 304 | size_t align, |
| 305 | unsigned int heap_id_mask, |
| 306 | unsigned int flags, |
| 307 | struct ion_handle **hdl, |
| 308 | struct dma_buf **buf) |
| 309 | { |
| 310 | int rc = 0; |
| 311 | |
| 312 | if (!hdl || !buf) { |
| 313 | CAM_ERR(CAM_CRM, "Invalid params"); |
| 314 | return -EINVAL; |
| 315 | } |
| 316 | |
| 317 | *hdl = ion_alloc(tbl.client, len, align, heap_id_mask, flags); |
| 318 | if (IS_ERR_OR_NULL(*hdl)) |
| 319 | return -ENOMEM; |
| 320 | |
| 321 | *buf = ion_share_dma_buf(tbl.client, *hdl); |
| 322 | if (IS_ERR_OR_NULL(*buf)) { |
| 323 | CAM_ERR(CAM_CRM, "get dma buf fail"); |
| 324 | rc = -EINVAL; |
| 325 | goto get_buf_fail; |
| 326 | } |
| 327 | |
| 328 | return rc; |
| 329 | |
| 330 | get_buf_fail: |
| 331 | ion_free(tbl.client, *hdl); |
| 332 | return rc; |
| 333 | |
| 334 | } |
| 335 | |
| 336 | static int cam_mem_util_get_dma_buf_fd(size_t len, |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 337 | size_t align, |
| 338 | unsigned int heap_id_mask, |
| 339 | unsigned int flags, |
| 340 | struct ion_handle **hdl, |
| 341 | int *fd) |
| 342 | { |
| 343 | int rc = 0; |
| 344 | |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 345 | if (!hdl || !fd) { |
| 346 | CAM_ERR(CAM_CRM, "Invalid params"); |
| 347 | return -EINVAL; |
| 348 | } |
| 349 | |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 350 | *hdl = ion_alloc(tbl.client, len, align, heap_id_mask, flags); |
| 351 | if (IS_ERR_OR_NULL(*hdl)) |
| 352 | return -ENOMEM; |
| 353 | |
| 354 | *fd = ion_share_dma_buf_fd(tbl.client, *hdl); |
| 355 | if (*fd < 0) { |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 356 | CAM_ERR(CAM_CRM, "get fd fail"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 357 | rc = -EINVAL; |
| 358 | goto get_fd_fail; |
| 359 | } |
| 360 | |
| 361 | return rc; |
| 362 | |
| 363 | get_fd_fail: |
| 364 | ion_free(tbl.client, *hdl); |
| 365 | return rc; |
| 366 | } |
| 367 | |
| 368 | static int cam_mem_util_ion_alloc(struct cam_mem_mgr_alloc_cmd *cmd, |
| 369 | struct ion_handle **hdl, |
| 370 | int *fd) |
| 371 | { |
| 372 | uint32_t heap_id; |
| 373 | uint32_t ion_flag = 0; |
| 374 | int rc; |
| 375 | |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 376 | if (cmd->flags & CAM_MEM_FLAG_PROTECTED_MODE) { |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 377 | heap_id = ION_HEAP(ION_SECURE_DISPLAY_HEAP_ID); |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 378 | ion_flag |= ION_FLAG_SECURE | ION_FLAG_CP_CAMERA; |
| 379 | } else { |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 380 | heap_id = ION_HEAP(ION_SYSTEM_HEAP_ID); |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 381 | } |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 382 | |
| 383 | if (cmd->flags & CAM_MEM_FLAG_CACHE) |
| 384 | ion_flag |= ION_FLAG_CACHED; |
| 385 | else |
| 386 | ion_flag &= ~ION_FLAG_CACHED; |
| 387 | |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 388 | rc = cam_mem_util_get_dma_buf_fd(cmd->len, |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 389 | cmd->align, |
| 390 | heap_id, |
| 391 | ion_flag, |
| 392 | hdl, |
| 393 | fd); |
| 394 | |
| 395 | return rc; |
| 396 | } |
| 397 | |
| 398 | |
| 399 | static int cam_mem_util_check_flags(struct cam_mem_mgr_alloc_cmd *cmd) |
| 400 | { |
| 401 | if (!cmd->flags) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 402 | CAM_ERR(CAM_CRM, "Invalid flags"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 403 | return -EINVAL; |
| 404 | } |
| 405 | |
| 406 | if (cmd->num_hdl > CAM_MEM_MMU_MAX_HANDLE) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 407 | CAM_ERR(CAM_CRM, "Num of mmu hdl exceeded maximum(%d)", |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 408 | CAM_MEM_MMU_MAX_HANDLE); |
| 409 | return -EINVAL; |
| 410 | } |
| 411 | |
| 412 | if (cmd->flags & CAM_MEM_FLAG_PROTECTED_MODE && |
| 413 | cmd->flags & CAM_MEM_FLAG_KMD_ACCESS) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 414 | CAM_ERR(CAM_CRM, "Kernel mapping in secure mode not allowed"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 415 | return -EINVAL; |
| 416 | } |
| 417 | |
| 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | static int cam_mem_util_check_map_flags(struct cam_mem_mgr_map_cmd *cmd) |
| 422 | { |
| 423 | if (!cmd->flags) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 424 | CAM_ERR(CAM_CRM, "Invalid flags"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 425 | return -EINVAL; |
| 426 | } |
| 427 | |
| 428 | if (cmd->num_hdl > CAM_MEM_MMU_MAX_HANDLE) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 429 | CAM_ERR(CAM_CRM, "Num of mmu hdl exceeded maximum(%d)", |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 430 | CAM_MEM_MMU_MAX_HANDLE); |
| 431 | return -EINVAL; |
| 432 | } |
| 433 | |
| 434 | if (cmd->flags & CAM_MEM_FLAG_PROTECTED_MODE && |
| 435 | cmd->flags & CAM_MEM_FLAG_KMD_ACCESS) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 436 | CAM_ERR(CAM_CRM, "Kernel mapping in secure mode not allowed"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 437 | return -EINVAL; |
| 438 | } |
| 439 | |
| 440 | if (cmd->flags & CAM_MEM_FLAG_HW_SHARED_ACCESS) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 441 | CAM_ERR(CAM_CRM, |
| 442 | "Shared memory buffers are not allowed to be mapped"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 443 | return -EINVAL; |
| 444 | } |
| 445 | |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | static int cam_mem_util_map_hw_va(uint32_t flags, |
| 450 | int32_t *mmu_hdls, |
| 451 | int32_t num_hdls, |
| 452 | int fd, |
| 453 | dma_addr_t *hw_vaddr, |
| 454 | size_t *len, |
| 455 | enum cam_smmu_region_id region) |
| 456 | { |
| 457 | int i; |
| 458 | int rc = -1; |
| 459 | int dir = cam_mem_util_get_dma_dir(flags); |
| 460 | |
| 461 | if (dir < 0) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 462 | CAM_ERR(CAM_CRM, "fail to map DMA direction"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 463 | return dir; |
| 464 | } |
| 465 | |
| 466 | if (flags & CAM_MEM_FLAG_PROTECTED_MODE) { |
| 467 | for (i = 0; i < num_hdls; i++) { |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 468 | rc = cam_smmu_map_stage2_iova(mmu_hdls[i], |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 469 | fd, |
| 470 | dir, |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 471 | tbl.client, |
| 472 | (ion_phys_addr_t *)hw_vaddr, |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 473 | len); |
| 474 | |
| 475 | if (rc < 0) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 476 | CAM_ERR(CAM_CRM, |
| 477 | "Failed to securely map to smmu"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 478 | goto multi_map_fail; |
| 479 | } |
| 480 | } |
| 481 | } else { |
| 482 | for (i = 0; i < num_hdls; i++) { |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 483 | rc = cam_smmu_map_user_iova(mmu_hdls[i], |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 484 | fd, |
| 485 | dir, |
| 486 | (dma_addr_t *)hw_vaddr, |
| 487 | len, |
| 488 | region); |
| 489 | |
| 490 | if (rc < 0) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 491 | CAM_ERR(CAM_CRM, "Failed to map to smmu"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 492 | goto multi_map_fail; |
| 493 | } |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | return rc; |
| 498 | multi_map_fail: |
| 499 | if (flags & CAM_MEM_FLAG_PROTECTED_MODE) |
| 500 | for (--i; i > 0; i--) |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 501 | cam_smmu_unmap_stage2_iova(mmu_hdls[i], fd); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 502 | else |
| 503 | for (--i; i > 0; i--) |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 504 | cam_smmu_unmap_user_iova(mmu_hdls[i], |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 505 | fd, |
| 506 | CAM_SMMU_REGION_IO); |
| 507 | return rc; |
| 508 | |
| 509 | } |
| 510 | |
| 511 | int cam_mem_mgr_alloc_and_map(struct cam_mem_mgr_alloc_cmd *cmd) |
| 512 | { |
| 513 | int rc; |
| 514 | int32_t idx; |
| 515 | struct ion_handle *ion_hdl; |
| 516 | int ion_fd; |
| 517 | dma_addr_t hw_vaddr = 0; |
| 518 | size_t len; |
| 519 | |
| 520 | if (!cmd) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 521 | CAM_ERR(CAM_CRM, " Invalid argument"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 522 | return -EINVAL; |
| 523 | } |
| 524 | len = cmd->len; |
| 525 | |
| 526 | rc = cam_mem_util_check_flags(cmd); |
| 527 | if (rc) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 528 | CAM_ERR(CAM_CRM, "Invalid flags: flags = %X", cmd->flags); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 529 | return rc; |
| 530 | } |
| 531 | |
| 532 | rc = cam_mem_util_ion_alloc(cmd, |
| 533 | &ion_hdl, |
| 534 | &ion_fd); |
| 535 | if (rc) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 536 | CAM_ERR(CAM_CRM, "Ion allocation failed"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 537 | return rc; |
| 538 | } |
| 539 | |
| 540 | idx = cam_mem_get_slot(); |
| 541 | if (idx < 0) { |
| 542 | rc = -ENOMEM; |
| 543 | goto slot_fail; |
| 544 | } |
| 545 | |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 546 | if ((cmd->flags & CAM_MEM_FLAG_HW_READ_WRITE) || |
| 547 | (cmd->flags & CAM_MEM_FLAG_HW_SHARED_ACCESS) || |
| 548 | (cmd->flags & CAM_MEM_FLAG_PROTECTED_MODE)) { |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 549 | |
| 550 | enum cam_smmu_region_id region; |
| 551 | |
| 552 | if (cmd->flags & CAM_MEM_FLAG_HW_READ_WRITE) |
| 553 | region = CAM_SMMU_REGION_IO; |
| 554 | |
| 555 | |
| 556 | if (cmd->flags & CAM_MEM_FLAG_HW_SHARED_ACCESS) |
| 557 | region = CAM_SMMU_REGION_SHARED; |
| 558 | |
| 559 | rc = cam_mem_util_map_hw_va(cmd->flags, |
| 560 | cmd->mmu_hdls, |
| 561 | cmd->num_hdl, |
| 562 | ion_fd, |
| 563 | &hw_vaddr, |
| 564 | &len, |
| 565 | region); |
| 566 | if (rc) |
| 567 | goto map_hw_fail; |
| 568 | } |
| 569 | |
| 570 | mutex_lock(&tbl.bufq[idx].q_lock); |
| 571 | tbl.bufq[idx].fd = ion_fd; |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 572 | tbl.bufq[idx].dma_buf = NULL; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 573 | tbl.bufq[idx].flags = cmd->flags; |
| 574 | tbl.bufq[idx].buf_handle = GET_MEM_HANDLE(idx, ion_fd); |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 575 | if (cmd->flags & CAM_MEM_FLAG_PROTECTED_MODE) |
| 576 | CAM_MEM_MGR_SET_SECURE_HDL(tbl.bufq[idx].buf_handle, true); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 577 | tbl.bufq[idx].kmdvaddr = 0; |
| 578 | |
| 579 | if (cmd->num_hdl > 0) |
| 580 | tbl.bufq[idx].vaddr = hw_vaddr; |
| 581 | else |
| 582 | tbl.bufq[idx].vaddr = 0; |
| 583 | |
| 584 | tbl.bufq[idx].i_hdl = ion_hdl; |
| 585 | tbl.bufq[idx].len = cmd->len; |
| 586 | tbl.bufq[idx].num_hdl = cmd->num_hdl; |
| 587 | memcpy(tbl.bufq[idx].hdls, cmd->mmu_hdls, |
| 588 | sizeof(int32_t) * cmd->num_hdl); |
| 589 | tbl.bufq[idx].is_imported = false; |
| 590 | mutex_unlock(&tbl.bufq[idx].q_lock); |
| 591 | |
| 592 | cmd->out.buf_handle = tbl.bufq[idx].buf_handle; |
| 593 | cmd->out.fd = tbl.bufq[idx].fd; |
| 594 | cmd->out.vaddr = 0; |
| 595 | |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 596 | CAM_DBG(CAM_CRM, "buf handle: %x, fd: %d, len: %zu", |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 597 | cmd->out.buf_handle, cmd->out.fd, |
| 598 | tbl.bufq[idx].len); |
| 599 | |
| 600 | return rc; |
| 601 | |
| 602 | map_hw_fail: |
| 603 | cam_mem_put_slot(idx); |
| 604 | slot_fail: |
| 605 | ion_free(tbl.client, ion_hdl); |
| 606 | return rc; |
| 607 | } |
| 608 | |
| 609 | int cam_mem_mgr_map(struct cam_mem_mgr_map_cmd *cmd) |
| 610 | { |
| 611 | int32_t idx; |
| 612 | int rc; |
| 613 | struct ion_handle *ion_hdl; |
| 614 | dma_addr_t hw_vaddr = 0; |
| 615 | size_t len = 0; |
| 616 | |
| 617 | if (!cmd || (cmd->fd < 0)) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 618 | CAM_ERR(CAM_CRM, "Invalid argument"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 619 | return -EINVAL; |
| 620 | } |
| 621 | |
| 622 | if (cmd->num_hdl > CAM_MEM_MMU_MAX_HANDLE) |
| 623 | return -EINVAL; |
| 624 | |
| 625 | rc = cam_mem_util_check_map_flags(cmd); |
| 626 | if (rc) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 627 | CAM_ERR(CAM_CRM, "Invalid flags: flags = %X", cmd->flags); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 628 | return rc; |
| 629 | } |
| 630 | |
| 631 | ion_hdl = ion_import_dma_buf_fd(tbl.client, cmd->fd); |
| 632 | if (IS_ERR_OR_NULL((void *)(ion_hdl))) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 633 | CAM_ERR(CAM_CRM, "Failed to import ion fd"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 634 | return -EINVAL; |
| 635 | } |
| 636 | |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 637 | if ((cmd->flags & CAM_MEM_FLAG_HW_READ_WRITE) || |
| 638 | (cmd->flags & CAM_MEM_FLAG_PROTECTED_MODE)) { |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 639 | rc = cam_mem_util_map_hw_va(cmd->flags, |
| 640 | cmd->mmu_hdls, |
| 641 | cmd->num_hdl, |
| 642 | cmd->fd, |
| 643 | &hw_vaddr, |
| 644 | &len, |
| 645 | CAM_SMMU_REGION_IO); |
| 646 | if (rc) |
| 647 | goto map_fail; |
| 648 | } |
| 649 | |
| 650 | idx = cam_mem_get_slot(); |
| 651 | if (idx < 0) { |
| 652 | rc = -ENOMEM; |
| 653 | goto map_fail; |
| 654 | } |
| 655 | |
| 656 | mutex_lock(&tbl.bufq[idx].q_lock); |
| 657 | tbl.bufq[idx].fd = cmd->fd; |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 658 | tbl.bufq[idx].dma_buf = NULL; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 659 | tbl.bufq[idx].flags = cmd->flags; |
| 660 | tbl.bufq[idx].buf_handle = GET_MEM_HANDLE(idx, cmd->fd); |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 661 | if (cmd->flags & CAM_MEM_FLAG_PROTECTED_MODE) |
| 662 | CAM_MEM_MGR_SET_SECURE_HDL(tbl.bufq[idx].buf_handle, true); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 663 | tbl.bufq[idx].kmdvaddr = 0; |
| 664 | |
| 665 | if (cmd->num_hdl > 0) |
| 666 | tbl.bufq[idx].vaddr = hw_vaddr; |
| 667 | else |
| 668 | tbl.bufq[idx].vaddr = 0; |
| 669 | |
| 670 | tbl.bufq[idx].i_hdl = ion_hdl; |
| 671 | tbl.bufq[idx].len = len; |
| 672 | tbl.bufq[idx].num_hdl = cmd->num_hdl; |
| 673 | memcpy(tbl.bufq[idx].hdls, cmd->mmu_hdls, |
| 674 | sizeof(int32_t) * cmd->num_hdl); |
| 675 | tbl.bufq[idx].is_imported = true; |
| 676 | mutex_unlock(&tbl.bufq[idx].q_lock); |
| 677 | |
| 678 | cmd->out.buf_handle = tbl.bufq[idx].buf_handle; |
| 679 | cmd->out.vaddr = 0; |
| 680 | |
| 681 | return rc; |
| 682 | |
| 683 | map_fail: |
| 684 | ion_free(tbl.client, ion_hdl); |
| 685 | return rc; |
| 686 | } |
| 687 | |
| 688 | static int cam_mem_util_unmap_hw_va(int32_t idx, |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 689 | enum cam_smmu_region_id region, |
| 690 | enum cam_smmu_mapping_client client) |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 691 | { |
| 692 | int i; |
| 693 | uint32_t flags; |
| 694 | int32_t *mmu_hdls; |
| 695 | int num_hdls; |
| 696 | int fd; |
| 697 | int rc = -EINVAL; |
| 698 | |
| 699 | if (idx >= CAM_MEM_BUFQ_MAX || idx <= 0) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 700 | CAM_ERR(CAM_CRM, "Incorrect index"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 701 | return rc; |
| 702 | } |
| 703 | |
| 704 | flags = tbl.bufq[idx].flags; |
| 705 | mmu_hdls = tbl.bufq[idx].hdls; |
| 706 | num_hdls = tbl.bufq[idx].num_hdl; |
| 707 | fd = tbl.bufq[idx].fd; |
| 708 | |
| 709 | if (flags & CAM_MEM_FLAG_PROTECTED_MODE) { |
| 710 | for (i = 0; i < num_hdls; i++) { |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 711 | rc = cam_smmu_unmap_stage2_iova(mmu_hdls[i], fd); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 712 | if (rc < 0) |
| 713 | goto unmap_end; |
| 714 | } |
| 715 | } else { |
| 716 | for (i = 0; i < num_hdls; i++) { |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 717 | if (client == CAM_SMMU_MAPPING_USER) { |
| 718 | rc = cam_smmu_unmap_user_iova(mmu_hdls[i], |
| 719 | fd, region); |
| 720 | } else if (client == CAM_SMMU_MAPPING_KERNEL) { |
| 721 | rc = cam_smmu_unmap_kernel_iova(mmu_hdls[i], |
| 722 | tbl.bufq[idx].dma_buf, region); |
| 723 | } else { |
| 724 | CAM_ERR(CAM_CRM, |
| 725 | "invalid caller for unmapping : %d", |
| 726 | client); |
| 727 | rc = -EINVAL; |
| 728 | } |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 729 | if (rc < 0) |
| 730 | goto unmap_end; |
| 731 | } |
| 732 | } |
| 733 | |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 734 | return rc; |
| 735 | |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 736 | unmap_end: |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 737 | CAM_ERR(CAM_CRM, "unmapping failed"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 738 | return rc; |
| 739 | } |
| 740 | |
Soundrapandian Jeyaprakash | 8d16e27 | 2017-10-12 11:05:37 -0700 | [diff] [blame] | 741 | static void cam_mem_mgr_unmap_active_buf(int idx) |
| 742 | { |
| 743 | enum cam_smmu_region_id region = CAM_SMMU_REGION_SHARED; |
| 744 | |
| 745 | if (tbl.bufq[idx].flags & CAM_MEM_FLAG_HW_SHARED_ACCESS) |
| 746 | region = CAM_SMMU_REGION_SHARED; |
| 747 | else if (tbl.bufq[idx].flags & CAM_MEM_FLAG_HW_READ_WRITE) |
| 748 | region = CAM_SMMU_REGION_IO; |
| 749 | |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 750 | cam_mem_util_unmap_hw_va(idx, region, CAM_SMMU_MAPPING_USER); |
Soundrapandian Jeyaprakash | 8d16e27 | 2017-10-12 11:05:37 -0700 | [diff] [blame] | 751 | } |
| 752 | |
| 753 | static int cam_mem_mgr_cleanup_table(void) |
| 754 | { |
| 755 | int i; |
| 756 | |
| 757 | mutex_lock(&tbl.m_lock); |
| 758 | for (i = 1; i < CAM_MEM_BUFQ_MAX; i++) { |
| 759 | if (!tbl.bufq[i].active) { |
| 760 | CAM_DBG(CAM_CRM, |
| 761 | "Buffer inactive at idx=%d, continuing", i); |
| 762 | continue; |
| 763 | } else { |
| 764 | CAM_INFO(CAM_CRM, |
| 765 | "Active buffer at idx=%d, possible leak needs unmapping", |
| 766 | i); |
| 767 | cam_mem_mgr_unmap_active_buf(i); |
| 768 | } |
| 769 | |
| 770 | mutex_lock(&tbl.bufq[i].q_lock); |
Suresh Vankadara | 466bed2 | 2017-11-30 06:30:20 +0530 | [diff] [blame] | 771 | if (tbl.bufq[i].i_hdl) { |
| 772 | ion_free(tbl.client, tbl.bufq[i].i_hdl); |
| 773 | tbl.bufq[i].i_hdl = NULL; |
| 774 | } |
Soundrapandian Jeyaprakash | 8d16e27 | 2017-10-12 11:05:37 -0700 | [diff] [blame] | 775 | tbl.bufq[i].fd = -1; |
| 776 | tbl.bufq[i].flags = 0; |
| 777 | tbl.bufq[i].buf_handle = -1; |
| 778 | tbl.bufq[i].vaddr = 0; |
| 779 | tbl.bufq[i].len = 0; |
| 780 | memset(tbl.bufq[i].hdls, 0, |
| 781 | sizeof(int32_t) * tbl.bufq[i].num_hdl); |
| 782 | tbl.bufq[i].num_hdl = 0; |
| 783 | tbl.bufq[i].i_hdl = NULL; |
| 784 | tbl.bufq[i].active = false; |
| 785 | mutex_unlock(&tbl.bufq[i].q_lock); |
| 786 | mutex_destroy(&tbl.bufq[i].q_lock); |
| 787 | } |
| 788 | bitmap_zero(tbl.bitmap, tbl.bits); |
| 789 | /* We need to reserve slot 0 because 0 is invalid */ |
| 790 | set_bit(0, tbl.bitmap); |
| 791 | mutex_unlock(&tbl.m_lock); |
| 792 | |
| 793 | return 0; |
| 794 | } |
| 795 | |
| 796 | void cam_mem_mgr_deinit(void) |
| 797 | { |
| 798 | cam_mem_mgr_cleanup_table(); |
| 799 | mutex_lock(&tbl.m_lock); |
| 800 | bitmap_zero(tbl.bitmap, tbl.bits); |
| 801 | kfree(tbl.bitmap); |
| 802 | tbl.bitmap = NULL; |
| 803 | cam_mem_util_client_destroy(); |
| 804 | mutex_unlock(&tbl.m_lock); |
| 805 | mutex_destroy(&tbl.m_lock); |
| 806 | } |
| 807 | |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 808 | static int cam_mem_util_unmap(int32_t idx, |
| 809 | enum cam_smmu_mapping_client client) |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 810 | { |
| 811 | int rc = 0; |
Krishnankutty Kolathappilly | 3ca340c | 2017-06-27 15:48:13 -0700 | [diff] [blame] | 812 | enum cam_smmu_region_id region = CAM_SMMU_REGION_SHARED; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 813 | |
| 814 | if (idx >= CAM_MEM_BUFQ_MAX || idx <= 0) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 815 | CAM_ERR(CAM_CRM, "Incorrect index"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 816 | return -EINVAL; |
| 817 | } |
| 818 | |
Suresh Vankadara | 466bed2 | 2017-11-30 06:30:20 +0530 | [diff] [blame] | 819 | CAM_DBG(CAM_CRM, "Flags = %X idx %d", tbl.bufq[idx].flags, idx); |
| 820 | |
| 821 | mutex_lock(&tbl.m_lock); |
| 822 | if ((!tbl.bufq[idx].active) && |
| 823 | (tbl.bufq[idx].vaddr) == 0) { |
| 824 | CAM_WARN(CAM_CRM, "Buffer at idx=%d is already unmapped,", |
| 825 | idx); |
| 826 | mutex_unlock(&tbl.m_lock); |
| 827 | return 0; |
| 828 | } |
| 829 | |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 830 | |
| 831 | if (tbl.bufq[idx].flags & CAM_MEM_FLAG_KMD_ACCESS) |
| 832 | if (tbl.bufq[idx].i_hdl && tbl.bufq[idx].kmdvaddr) |
| 833 | ion_unmap_kernel(tbl.client, tbl.bufq[idx].i_hdl); |
| 834 | |
Seemanta Dutta | a037cd1 | 2017-07-06 15:45:29 -0700 | [diff] [blame] | 835 | /* SHARED flag gets precedence, all other flags after it */ |
| 836 | if (tbl.bufq[idx].flags & CAM_MEM_FLAG_HW_SHARED_ACCESS) { |
| 837 | region = CAM_SMMU_REGION_SHARED; |
| 838 | } else { |
Krishnankutty Kolathappilly | 3ca340c | 2017-06-27 15:48:13 -0700 | [diff] [blame] | 839 | if (tbl.bufq[idx].flags & CAM_MEM_FLAG_HW_READ_WRITE) |
| 840 | region = CAM_SMMU_REGION_IO; |
Krishnankutty Kolathappilly | 3ca340c | 2017-06-27 15:48:13 -0700 | [diff] [blame] | 841 | } |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 842 | |
Lakshmi Narayana Kalavala | 2c71428 | 2017-09-08 12:27:36 -0700 | [diff] [blame] | 843 | if ((tbl.bufq[idx].flags & CAM_MEM_FLAG_HW_READ_WRITE) || |
| 844 | (tbl.bufq[idx].flags & CAM_MEM_FLAG_HW_SHARED_ACCESS) || |
| 845 | (tbl.bufq[idx].flags & CAM_MEM_FLAG_PROTECTED_MODE)) |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 846 | rc = cam_mem_util_unmap_hw_va(idx, region, client); |
Seemanta Dutta | a037cd1 | 2017-07-06 15:45:29 -0700 | [diff] [blame] | 847 | |
| 848 | |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 849 | mutex_lock(&tbl.bufq[idx].q_lock); |
| 850 | tbl.bufq[idx].flags = 0; |
| 851 | tbl.bufq[idx].buf_handle = -1; |
| 852 | tbl.bufq[idx].vaddr = 0; |
| 853 | memset(tbl.bufq[idx].hdls, 0, |
| 854 | sizeof(int32_t) * CAM_MEM_MMU_MAX_HANDLE); |
| 855 | |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 856 | CAM_DBG(CAM_CRM, |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 857 | "Ion handle at idx = %d freeing = %pK, fd = %d, imported %d dma_buf %pK", |
Krishnankutty Kolathappilly | 29fedeb | 2017-06-13 12:05:48 -0700 | [diff] [blame] | 858 | idx, tbl.bufq[idx].i_hdl, tbl.bufq[idx].fd, |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 859 | tbl.bufq[idx].is_imported, |
| 860 | tbl.bufq[idx].dma_buf); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 861 | |
Krishnankutty Kolathappilly | 29fedeb | 2017-06-13 12:05:48 -0700 | [diff] [blame] | 862 | if (tbl.bufq[idx].i_hdl) { |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 863 | ion_free(tbl.client, tbl.bufq[idx].i_hdl); |
| 864 | tbl.bufq[idx].i_hdl = NULL; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 865 | } |
| 866 | |
| 867 | tbl.bufq[idx].fd = -1; |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 868 | tbl.bufq[idx].dma_buf = NULL; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 869 | tbl.bufq[idx].is_imported = false; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 870 | tbl.bufq[idx].len = 0; |
| 871 | tbl.bufq[idx].num_hdl = 0; |
Suresh Vankadara | 466bed2 | 2017-11-30 06:30:20 +0530 | [diff] [blame] | 872 | tbl.bufq[idx].active = false; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 873 | mutex_unlock(&tbl.bufq[idx].q_lock); |
Suresh Vankadara | 466bed2 | 2017-11-30 06:30:20 +0530 | [diff] [blame] | 874 | mutex_destroy(&tbl.bufq[idx].q_lock); |
| 875 | clear_bit(idx, tbl.bitmap); |
| 876 | mutex_unlock(&tbl.m_lock); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 877 | |
| 878 | return rc; |
| 879 | } |
| 880 | |
| 881 | int cam_mem_mgr_release(struct cam_mem_mgr_release_cmd *cmd) |
| 882 | { |
| 883 | int idx; |
| 884 | int rc; |
| 885 | |
| 886 | if (!cmd) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 887 | CAM_ERR(CAM_CRM, "Invalid argument"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 888 | return -EINVAL; |
| 889 | } |
| 890 | |
| 891 | idx = CAM_MEM_MGR_GET_HDL_IDX(cmd->buf_handle); |
| 892 | if (idx >= CAM_MEM_BUFQ_MAX || idx <= 0) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 893 | CAM_ERR(CAM_CRM, "Incorrect index extracted from mem handle"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 894 | return -EINVAL; |
| 895 | } |
| 896 | |
| 897 | if (!tbl.bufq[idx].active) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 898 | CAM_ERR(CAM_CRM, "Released buffer state should be active"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 899 | return -EINVAL; |
| 900 | } |
| 901 | |
| 902 | if (tbl.bufq[idx].buf_handle != cmd->buf_handle) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 903 | CAM_ERR(CAM_CRM, |
| 904 | "Released buf handle not matching within table"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 905 | return -EINVAL; |
| 906 | } |
| 907 | |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 908 | CAM_DBG(CAM_CRM, "Releasing hdl = %u", cmd->buf_handle); |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 909 | rc = cam_mem_util_unmap(idx, CAM_SMMU_MAPPING_USER); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 910 | |
| 911 | return rc; |
| 912 | } |
| 913 | |
| 914 | int cam_mem_mgr_request_mem(struct cam_mem_mgr_request_desc *inp, |
| 915 | struct cam_mem_mgr_memory_desc *out) |
| 916 | { |
| 917 | struct ion_handle *hdl; |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 918 | struct dma_buf *buf = NULL; |
| 919 | int ion_fd = -1; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 920 | int rc = 0; |
| 921 | uint32_t heap_id; |
| 922 | int32_t ion_flag = 0; |
| 923 | uint64_t kvaddr; |
| 924 | dma_addr_t iova = 0; |
| 925 | size_t request_len = 0; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 926 | uint32_t mem_handle; |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 927 | int32_t idx; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 928 | int32_t smmu_hdl = 0; |
| 929 | int32_t num_hdl = 0; |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 930 | |
Seemanta Dutta | a037cd1 | 2017-07-06 15:45:29 -0700 | [diff] [blame] | 931 | enum cam_smmu_region_id region = CAM_SMMU_REGION_SHARED; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 932 | |
| 933 | if (!inp || !out) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 934 | CAM_ERR(CAM_CRM, "Invalid params"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 935 | return -EINVAL; |
| 936 | } |
| 937 | |
Seemanta Dutta | a037cd1 | 2017-07-06 15:45:29 -0700 | [diff] [blame] | 938 | if (!(inp->flags & CAM_MEM_FLAG_HW_READ_WRITE || |
| 939 | inp->flags & CAM_MEM_FLAG_HW_SHARED_ACCESS || |
| 940 | inp->flags & CAM_MEM_FLAG_CACHE)) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 941 | CAM_ERR(CAM_CRM, "Invalid flags for request mem"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 942 | return -EINVAL; |
| 943 | } |
| 944 | |
| 945 | if (inp->flags & CAM_MEM_FLAG_CACHE) |
| 946 | ion_flag |= ION_FLAG_CACHED; |
| 947 | else |
| 948 | ion_flag &= ~ION_FLAG_CACHED; |
| 949 | |
| 950 | heap_id = ION_HEAP(ION_SYSTEM_HEAP_ID); |
| 951 | |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 952 | rc = cam_mem_util_get_dma_buf(inp->size, |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 953 | inp->align, |
| 954 | heap_id, |
| 955 | ion_flag, |
| 956 | &hdl, |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 957 | &buf); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 958 | |
| 959 | if (rc) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 960 | CAM_ERR(CAM_CRM, "ION alloc failed for shared buffer"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 961 | goto ion_fail; |
| 962 | } else { |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 963 | CAM_DBG(CAM_CRM, "Got dma_buf = %pK, hdl = %pK", buf, hdl); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | rc = cam_mem_util_map_cpu_va(hdl, &kvaddr, &request_len); |
| 967 | if (rc) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 968 | CAM_ERR(CAM_CRM, "Failed to get kernel vaddr"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 969 | goto map_fail; |
| 970 | } |
| 971 | |
| 972 | if (!inp->smmu_hdl) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 973 | CAM_ERR(CAM_CRM, "Invalid SMMU handle"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 974 | rc = -EINVAL; |
| 975 | goto smmu_fail; |
| 976 | } |
| 977 | |
Seemanta Dutta | a037cd1 | 2017-07-06 15:45:29 -0700 | [diff] [blame] | 978 | /* SHARED flag gets precedence, all other flags after it */ |
| 979 | if (inp->flags & CAM_MEM_FLAG_HW_SHARED_ACCESS) { |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 980 | region = CAM_SMMU_REGION_SHARED; |
Seemanta Dutta | a037cd1 | 2017-07-06 15:45:29 -0700 | [diff] [blame] | 981 | } else { |
| 982 | if (inp->flags & CAM_MEM_FLAG_HW_READ_WRITE) |
| 983 | region = CAM_SMMU_REGION_IO; |
| 984 | } |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 985 | |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 986 | rc = cam_smmu_map_kernel_iova(inp->smmu_hdl, |
| 987 | buf, |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 988 | CAM_SMMU_MAP_RW, |
| 989 | &iova, |
| 990 | &request_len, |
| 991 | region); |
| 992 | |
| 993 | if (rc < 0) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 994 | CAM_ERR(CAM_CRM, "SMMU mapping failed"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 995 | goto smmu_fail; |
| 996 | } |
| 997 | |
| 998 | smmu_hdl = inp->smmu_hdl; |
| 999 | num_hdl = 1; |
| 1000 | |
| 1001 | idx = cam_mem_get_slot(); |
| 1002 | if (idx < 0) { |
| 1003 | rc = -ENOMEM; |
| 1004 | goto slot_fail; |
| 1005 | } |
| 1006 | |
| 1007 | mutex_lock(&tbl.bufq[idx].q_lock); |
| 1008 | mem_handle = GET_MEM_HANDLE(idx, ion_fd); |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1009 | tbl.bufq[idx].dma_buf = buf; |
| 1010 | tbl.bufq[idx].fd = -1; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 1011 | tbl.bufq[idx].flags = inp->flags; |
| 1012 | tbl.bufq[idx].buf_handle = mem_handle; |
| 1013 | tbl.bufq[idx].kmdvaddr = kvaddr; |
| 1014 | |
| 1015 | tbl.bufq[idx].vaddr = iova; |
| 1016 | |
| 1017 | tbl.bufq[idx].i_hdl = hdl; |
| 1018 | tbl.bufq[idx].len = inp->size; |
| 1019 | tbl.bufq[idx].num_hdl = num_hdl; |
| 1020 | memcpy(tbl.bufq[idx].hdls, &smmu_hdl, |
| 1021 | sizeof(int32_t)); |
| 1022 | tbl.bufq[idx].is_imported = false; |
| 1023 | mutex_unlock(&tbl.bufq[idx].q_lock); |
| 1024 | |
| 1025 | out->kva = kvaddr; |
| 1026 | out->iova = (uint32_t)iova; |
| 1027 | out->smmu_hdl = smmu_hdl; |
| 1028 | out->mem_handle = mem_handle; |
| 1029 | out->len = inp->size; |
Seemanta Dutta | a037cd1 | 2017-07-06 15:45:29 -0700 | [diff] [blame] | 1030 | out->region = region; |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 1031 | |
| 1032 | return rc; |
| 1033 | slot_fail: |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1034 | cam_smmu_unmap_kernel_iova(inp->smmu_hdl, |
| 1035 | buf, region); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 1036 | smmu_fail: |
| 1037 | ion_unmap_kernel(tbl.client, hdl); |
| 1038 | map_fail: |
| 1039 | ion_free(tbl.client, hdl); |
| 1040 | ion_fail: |
| 1041 | return rc; |
| 1042 | } |
| 1043 | EXPORT_SYMBOL(cam_mem_mgr_request_mem); |
| 1044 | |
| 1045 | int cam_mem_mgr_release_mem(struct cam_mem_mgr_memory_desc *inp) |
| 1046 | { |
| 1047 | int32_t idx; |
| 1048 | int rc; |
| 1049 | |
| 1050 | if (!inp) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 1051 | CAM_ERR(CAM_CRM, "Invalid argument"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 1052 | return -EINVAL; |
| 1053 | } |
| 1054 | |
| 1055 | idx = CAM_MEM_MGR_GET_HDL_IDX(inp->mem_handle); |
| 1056 | if (idx >= CAM_MEM_BUFQ_MAX || idx <= 0) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 1057 | CAM_ERR(CAM_CRM, "Incorrect index extracted from mem handle"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 1058 | return -EINVAL; |
| 1059 | } |
| 1060 | |
| 1061 | if (!tbl.bufq[idx].active) { |
Suresh Vankadara | 466bed2 | 2017-11-30 06:30:20 +0530 | [diff] [blame] | 1062 | if (tbl.bufq[idx].vaddr == 0) { |
| 1063 | CAM_ERR(CAM_CRM, "buffer is released already"); |
| 1064 | return 0; |
| 1065 | } |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 1066 | CAM_ERR(CAM_CRM, "Released buffer state should be active"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 1067 | return -EINVAL; |
| 1068 | } |
| 1069 | |
| 1070 | if (tbl.bufq[idx].buf_handle != inp->mem_handle) { |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 1071 | CAM_ERR(CAM_CRM, |
| 1072 | "Released buf handle not matching within table"); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 1073 | return -EINVAL; |
| 1074 | } |
| 1075 | |
Jigarkumar Zala | 36ad717 | 2017-07-18 19:52:14 -0700 | [diff] [blame] | 1076 | CAM_DBG(CAM_CRM, "Releasing hdl = %X", inp->mem_handle); |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1077 | rc = cam_mem_util_unmap(idx, CAM_SMMU_MAPPING_KERNEL); |
Seemanta Dutta | 1c827da | 2017-04-05 17:34:05 -0700 | [diff] [blame] | 1078 | |
| 1079 | return rc; |
| 1080 | } |
| 1081 | EXPORT_SYMBOL(cam_mem_mgr_release_mem); |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1082 | |
| 1083 | int cam_mem_mgr_reserve_memory_region(struct cam_mem_mgr_request_desc *inp, |
| 1084 | enum cam_smmu_region_id region, |
| 1085 | struct cam_mem_mgr_memory_desc *out) |
| 1086 | { |
| 1087 | struct ion_handle *hdl; |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1088 | struct dma_buf *buf = NULL; |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1089 | int rc = 0; |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1090 | int ion_fd = -1; |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1091 | uint32_t heap_id; |
| 1092 | dma_addr_t iova = 0; |
| 1093 | size_t request_len = 0; |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1094 | uint32_t mem_handle; |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1095 | int32_t idx; |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1096 | int32_t smmu_hdl = 0; |
| 1097 | int32_t num_hdl = 0; |
| 1098 | |
| 1099 | if (!inp || !out) { |
| 1100 | CAM_ERR(CAM_CRM, "Invalid param(s)"); |
| 1101 | return -EINVAL; |
| 1102 | } |
| 1103 | |
| 1104 | if (!inp->smmu_hdl) { |
| 1105 | CAM_ERR(CAM_CRM, "Invalid SMMU handle"); |
| 1106 | return -EINVAL; |
| 1107 | } |
| 1108 | |
| 1109 | if (region != CAM_SMMU_REGION_SECHEAP) { |
| 1110 | CAM_ERR(CAM_CRM, "Only secondary heap supported"); |
| 1111 | return -EINVAL; |
| 1112 | } |
| 1113 | |
| 1114 | heap_id = ION_HEAP(ION_SYSTEM_HEAP_ID); |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1115 | rc = cam_mem_util_get_dma_buf(inp->size, |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1116 | inp->align, |
| 1117 | heap_id, |
| 1118 | 0, |
| 1119 | &hdl, |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1120 | &buf); |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1121 | |
| 1122 | if (rc) { |
| 1123 | CAM_ERR(CAM_CRM, "ION alloc failed for sec heap buffer"); |
| 1124 | goto ion_fail; |
| 1125 | } else { |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1126 | CAM_DBG(CAM_CRM, "Got dma_buf = %pK, hdl = %pK", buf, hdl); |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | rc = cam_smmu_reserve_sec_heap(inp->smmu_hdl, |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1130 | buf, |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1131 | &iova, |
| 1132 | &request_len); |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1133 | |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1134 | if (rc) { |
| 1135 | CAM_ERR(CAM_CRM, "Reserving secondary heap failed"); |
| 1136 | goto smmu_fail; |
| 1137 | } |
| 1138 | |
| 1139 | smmu_hdl = inp->smmu_hdl; |
| 1140 | num_hdl = 1; |
| 1141 | |
| 1142 | idx = cam_mem_get_slot(); |
| 1143 | if (idx < 0) { |
| 1144 | rc = -ENOMEM; |
| 1145 | goto slot_fail; |
| 1146 | } |
| 1147 | |
| 1148 | mutex_lock(&tbl.bufq[idx].q_lock); |
| 1149 | mem_handle = GET_MEM_HANDLE(idx, ion_fd); |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1150 | tbl.bufq[idx].fd = -1; |
| 1151 | tbl.bufq[idx].dma_buf = buf; |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1152 | tbl.bufq[idx].flags = inp->flags; |
| 1153 | tbl.bufq[idx].buf_handle = mem_handle; |
| 1154 | tbl.bufq[idx].kmdvaddr = 0; |
| 1155 | |
| 1156 | tbl.bufq[idx].vaddr = iova; |
| 1157 | |
| 1158 | tbl.bufq[idx].i_hdl = hdl; |
| 1159 | tbl.bufq[idx].len = request_len; |
| 1160 | tbl.bufq[idx].num_hdl = num_hdl; |
| 1161 | memcpy(tbl.bufq[idx].hdls, &smmu_hdl, |
| 1162 | sizeof(int32_t)); |
| 1163 | tbl.bufq[idx].is_imported = false; |
| 1164 | mutex_unlock(&tbl.bufq[idx].q_lock); |
| 1165 | |
| 1166 | out->kva = 0; |
| 1167 | out->iova = (uint32_t)iova; |
| 1168 | out->smmu_hdl = smmu_hdl; |
| 1169 | out->mem_handle = mem_handle; |
| 1170 | out->len = request_len; |
| 1171 | out->region = region; |
| 1172 | |
| 1173 | return rc; |
| 1174 | |
| 1175 | slot_fail: |
| 1176 | cam_smmu_release_sec_heap(smmu_hdl); |
| 1177 | smmu_fail: |
| 1178 | ion_free(tbl.client, hdl); |
| 1179 | ion_fail: |
| 1180 | return rc; |
| 1181 | } |
| 1182 | EXPORT_SYMBOL(cam_mem_mgr_reserve_memory_region); |
| 1183 | |
| 1184 | int cam_mem_mgr_free_memory_region(struct cam_mem_mgr_memory_desc *inp) |
| 1185 | { |
| 1186 | int32_t idx; |
| 1187 | int rc; |
| 1188 | int32_t smmu_hdl; |
| 1189 | |
| 1190 | if (!inp) { |
| 1191 | CAM_ERR(CAM_CRM, "Invalid argument"); |
| 1192 | return -EINVAL; |
| 1193 | } |
| 1194 | |
| 1195 | if (inp->region != CAM_SMMU_REGION_SECHEAP) { |
| 1196 | CAM_ERR(CAM_CRM, "Only secondary heap supported"); |
| 1197 | return -EINVAL; |
| 1198 | } |
| 1199 | |
| 1200 | idx = CAM_MEM_MGR_GET_HDL_IDX(inp->mem_handle); |
| 1201 | if (idx >= CAM_MEM_BUFQ_MAX || idx <= 0) { |
| 1202 | CAM_ERR(CAM_CRM, "Incorrect index extracted from mem handle"); |
| 1203 | return -EINVAL; |
| 1204 | } |
| 1205 | |
| 1206 | if (!tbl.bufq[idx].active) { |
Suresh Vankadara | 466bed2 | 2017-11-30 06:30:20 +0530 | [diff] [blame] | 1207 | if (tbl.bufq[idx].vaddr == 0) { |
| 1208 | CAM_ERR(CAM_CRM, "buffer is released already"); |
| 1209 | return 0; |
| 1210 | } |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1211 | CAM_ERR(CAM_CRM, "Released buffer state should be active"); |
| 1212 | return -EINVAL; |
| 1213 | } |
| 1214 | |
| 1215 | if (tbl.bufq[idx].buf_handle != inp->mem_handle) { |
| 1216 | CAM_ERR(CAM_CRM, |
| 1217 | "Released buf handle not matching within table"); |
| 1218 | return -EINVAL; |
| 1219 | } |
| 1220 | |
| 1221 | if (tbl.bufq[idx].num_hdl != 1) { |
| 1222 | CAM_ERR(CAM_CRM, |
| 1223 | "Sec heap region should have only one smmu hdl"); |
| 1224 | return -ENODEV; |
| 1225 | } |
| 1226 | |
| 1227 | memcpy(&smmu_hdl, tbl.bufq[idx].hdls, |
| 1228 | sizeof(int32_t)); |
| 1229 | if (inp->smmu_hdl != smmu_hdl) { |
| 1230 | CAM_ERR(CAM_CRM, |
| 1231 | "Passed SMMU handle doesn't match with internal hdl"); |
| 1232 | return -ENODEV; |
| 1233 | } |
| 1234 | |
| 1235 | rc = cam_smmu_release_sec_heap(inp->smmu_hdl); |
| 1236 | if (rc) { |
| 1237 | CAM_ERR(CAM_CRM, |
| 1238 | "Sec heap region release failed"); |
| 1239 | return -ENODEV; |
| 1240 | } |
| 1241 | |
| 1242 | CAM_DBG(CAM_CRM, "Releasing hdl = %X", inp->mem_handle); |
Karthik Anantha Ram | 92a044d | 2017-10-27 18:53:25 -0700 | [diff] [blame] | 1243 | rc = cam_mem_util_unmap(idx, CAM_SMMU_MAPPING_KERNEL); |
Seemanta Dutta | 93f940c | 2017-10-13 14:34:18 -0700 | [diff] [blame] | 1244 | if (rc) |
| 1245 | CAM_ERR(CAM_CRM, "unmapping secondary heap failed"); |
| 1246 | |
| 1247 | return rc; |
| 1248 | } |
| 1249 | EXPORT_SYMBOL(cam_mem_mgr_free_memory_region); |