cam_packet_util.c 8.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.
  4. */
  5. #include <linux/types.h>
  6. #include <linux/slab.h>
  7. #include "cam_mem_mgr.h"
  8. #include "cam_packet_util.h"
  9. #include "cam_debug_util.h"
  10. int cam_packet_util_get_cmd_mem_addr(int handle, uint32_t **buf_addr,
  11. size_t *len)
  12. {
  13. int rc = 0;
  14. uintptr_t kmd_buf_addr = 0;
  15. rc = cam_mem_get_cpu_buf(handle, &kmd_buf_addr, len);
  16. if (rc) {
  17. CAM_ERR(CAM_UTIL, "Unable to get the virtual address %d", rc);
  18. } else {
  19. if (kmd_buf_addr && *len) {
  20. *buf_addr = (uint32_t *)kmd_buf_addr;
  21. } else {
  22. CAM_ERR(CAM_UTIL, "Invalid addr and length :%zd", *len);
  23. rc = -ENOMEM;
  24. }
  25. }
  26. return rc;
  27. }
  28. int cam_packet_util_validate_cmd_desc(struct cam_cmd_buf_desc *cmd_desc)
  29. {
  30. if ((cmd_desc->length > cmd_desc->size) ||
  31. (cmd_desc->mem_handle <= 0)) {
  32. CAM_ERR(CAM_UTIL, "invalid cmd arg %d %d %d %d",
  33. cmd_desc->offset, cmd_desc->length,
  34. cmd_desc->mem_handle, cmd_desc->size);
  35. return -EINVAL;
  36. }
  37. return 0;
  38. }
  39. int cam_packet_util_validate_packet(struct cam_packet *packet,
  40. size_t remain_len)
  41. {
  42. size_t sum_cmd_desc = 0;
  43. size_t sum_io_cfgs = 0;
  44. size_t sum_patch_desc = 0;
  45. size_t pkt_wo_payload = 0;
  46. if (!packet)
  47. return -EINVAL;
  48. if ((size_t)packet->header.size > remain_len) {
  49. CAM_ERR(CAM_UTIL,
  50. "Invalid packet size: %zu, CPU buf length: %zu",
  51. (size_t)packet->header.size, remain_len);
  52. return -EINVAL;
  53. }
  54. CAM_DBG(CAM_UTIL, "num cmd buf:%d num of io config:%d kmd buf index:%d",
  55. packet->num_cmd_buf, packet->num_io_configs,
  56. packet->kmd_cmd_buf_index);
  57. sum_cmd_desc = packet->num_cmd_buf * sizeof(struct cam_cmd_buf_desc);
  58. sum_io_cfgs = packet->num_io_configs * sizeof(struct cam_buf_io_cfg);
  59. sum_patch_desc = packet->num_patches * sizeof(struct cam_patch_desc);
  60. pkt_wo_payload = offsetof(struct cam_packet, payload);
  61. if ((!packet->header.size) ||
  62. ((pkt_wo_payload + (size_t)packet->cmd_buf_offset +
  63. sum_cmd_desc) > (size_t)packet->header.size) ||
  64. ((pkt_wo_payload + (size_t)packet->io_configs_offset +
  65. sum_io_cfgs) > (size_t)packet->header.size) ||
  66. ((pkt_wo_payload + (size_t)packet->patch_offset +
  67. sum_patch_desc) > (size_t)packet->header.size)) {
  68. CAM_ERR(CAM_UTIL, "params not within mem len:%zu %zu %zu %zu",
  69. (size_t)packet->header.size, sum_cmd_desc,
  70. sum_io_cfgs, sum_patch_desc);
  71. return -EINVAL;
  72. }
  73. return 0;
  74. }
  75. int cam_packet_util_get_kmd_buffer(struct cam_packet *packet,
  76. struct cam_kmd_buf_info *kmd_buf)
  77. {
  78. int rc = 0;
  79. size_t len = 0;
  80. size_t remain_len = 0;
  81. struct cam_cmd_buf_desc *cmd_desc;
  82. uint32_t *cpu_addr;
  83. if (!packet || !kmd_buf) {
  84. CAM_ERR(CAM_UTIL, "Invalid arg %pK %pK", packet, kmd_buf);
  85. return -EINVAL;
  86. }
  87. if ((packet->kmd_cmd_buf_index < 0) ||
  88. (packet->kmd_cmd_buf_index >= packet->num_cmd_buf)) {
  89. CAM_ERR(CAM_UTIL, "Invalid kmd buf index: %d",
  90. packet->kmd_cmd_buf_index);
  91. return -EINVAL;
  92. }
  93. /* Take first command descriptor and add offset to it for kmd*/
  94. cmd_desc = (struct cam_cmd_buf_desc *) ((uint8_t *)
  95. &packet->payload + packet->cmd_buf_offset);
  96. cmd_desc += packet->kmd_cmd_buf_index;
  97. rc = cam_packet_util_validate_cmd_desc(cmd_desc);
  98. if (rc)
  99. return rc;
  100. rc = cam_packet_util_get_cmd_mem_addr(cmd_desc->mem_handle, &cpu_addr,
  101. &len);
  102. if (rc)
  103. return rc;
  104. remain_len = len;
  105. if (((size_t)cmd_desc->offset >= len) ||
  106. ((size_t)cmd_desc->size > (len - (size_t)cmd_desc->offset))) {
  107. CAM_ERR(CAM_UTIL, "invalid memory len:%zd and cmd desc size:%d",
  108. len, cmd_desc->size);
  109. return -EINVAL;
  110. }
  111. remain_len -= (size_t)cmd_desc->offset;
  112. if ((size_t)packet->kmd_cmd_buf_offset >= remain_len) {
  113. CAM_ERR(CAM_UTIL, "Invalid kmd cmd buf offset: %zu",
  114. (size_t)packet->kmd_cmd_buf_offset);
  115. return -EINVAL;
  116. }
  117. cpu_addr += (cmd_desc->offset / 4) + (packet->kmd_cmd_buf_offset / 4);
  118. CAM_DBG(CAM_UTIL, "total size %d, cmd size: %d, KMD buffer size: %d",
  119. cmd_desc->size, cmd_desc->length,
  120. cmd_desc->size - cmd_desc->length);
  121. CAM_DBG(CAM_UTIL, "hdl 0x%x, cmd offset %d, kmd offset %d, addr 0x%pK",
  122. cmd_desc->mem_handle, cmd_desc->offset,
  123. packet->kmd_cmd_buf_offset, cpu_addr);
  124. kmd_buf->cpu_addr = cpu_addr;
  125. kmd_buf->handle = cmd_desc->mem_handle;
  126. kmd_buf->offset = cmd_desc->offset + packet->kmd_cmd_buf_offset;
  127. kmd_buf->size = cmd_desc->size - cmd_desc->length;
  128. kmd_buf->used_bytes = 0;
  129. return rc;
  130. }
  131. int cam_packet_util_process_patches(struct cam_packet *packet,
  132. int32_t iommu_hdl, int32_t sec_mmu_hdl)
  133. {
  134. struct cam_patch_desc *patch_desc = NULL;
  135. dma_addr_t iova_addr;
  136. uintptr_t cpu_addr = 0;
  137. uint32_t temp;
  138. uint32_t *dst_cpu_addr;
  139. uint32_t *src_buf_iova_addr;
  140. size_t dst_buf_len;
  141. size_t src_buf_size;
  142. int i;
  143. int rc = 0;
  144. int32_t hdl;
  145. /* process patch descriptor */
  146. patch_desc = (struct cam_patch_desc *)
  147. ((uint32_t *) &packet->payload +
  148. packet->patch_offset/4);
  149. CAM_DBG(CAM_UTIL, "packet = %pK patch_desc = %pK size = %lu",
  150. (void *)packet, (void *)patch_desc,
  151. sizeof(struct cam_patch_desc));
  152. for (i = 0; i < packet->num_patches; i++) {
  153. hdl = cam_mem_is_secure_buf(patch_desc[i].src_buf_hdl) ?
  154. sec_mmu_hdl : iommu_hdl;
  155. rc = cam_mem_get_io_buf(patch_desc[i].src_buf_hdl,
  156. hdl, &iova_addr, &src_buf_size);
  157. if (rc < 0) {
  158. CAM_ERR(CAM_UTIL, "unable to get src buf address");
  159. return rc;
  160. }
  161. src_buf_iova_addr = (uint32_t *)iova_addr;
  162. temp = iova_addr;
  163. rc = cam_mem_get_cpu_buf(patch_desc[i].dst_buf_hdl,
  164. &cpu_addr, &dst_buf_len);
  165. if (rc < 0 || !cpu_addr || (dst_buf_len == 0)) {
  166. CAM_ERR(CAM_UTIL, "unable to get dst buf address");
  167. return rc;
  168. }
  169. dst_cpu_addr = (uint32_t *)cpu_addr;
  170. CAM_DBG(CAM_UTIL, "i = %d patch info = %x %x %x %x", i,
  171. patch_desc[i].dst_buf_hdl, patch_desc[i].dst_offset,
  172. patch_desc[i].src_buf_hdl, patch_desc[i].src_offset);
  173. if ((size_t)patch_desc[i].src_offset >= src_buf_size) {
  174. CAM_ERR(CAM_UTIL,
  175. "Invalid src buf patch offset");
  176. return -EINVAL;
  177. }
  178. if ((dst_buf_len < sizeof(void *)) ||
  179. ((dst_buf_len - sizeof(void *)) <
  180. (size_t)patch_desc[i].dst_offset)) {
  181. CAM_ERR(CAM_UTIL,
  182. "Invalid dst buf patch offset");
  183. return -EINVAL;
  184. }
  185. dst_cpu_addr = (uint32_t *)((uint8_t *)dst_cpu_addr +
  186. patch_desc[i].dst_offset);
  187. temp += patch_desc[i].src_offset;
  188. *dst_cpu_addr = temp;
  189. CAM_DBG(CAM_UTIL,
  190. "patch is done for dst %pK with src %pK value %llx",
  191. dst_cpu_addr, src_buf_iova_addr,
  192. *((uint64_t *)dst_cpu_addr));
  193. }
  194. return rc;
  195. }
  196. int cam_packet_util_process_generic_cmd_buffer(
  197. struct cam_cmd_buf_desc *cmd_buf,
  198. cam_packet_generic_blob_handler blob_handler_cb, void *user_data)
  199. {
  200. int rc = 0;
  201. uintptr_t cpu_addr = 0;
  202. size_t buf_size;
  203. size_t remain_len = 0;
  204. uint32_t *blob_ptr;
  205. uint32_t blob_type, blob_size, blob_block_size, len_read;
  206. if (!cmd_buf || !blob_handler_cb) {
  207. CAM_ERR(CAM_UTIL, "Invalid args %pK %pK",
  208. cmd_buf, blob_handler_cb);
  209. return -EINVAL;
  210. }
  211. if (!cmd_buf->length || !cmd_buf->size) {
  212. CAM_ERR(CAM_UTIL, "Invalid cmd buf size %d %d",
  213. cmd_buf->length, cmd_buf->size);
  214. return -EINVAL;
  215. }
  216. rc = cam_mem_get_cpu_buf(cmd_buf->mem_handle, &cpu_addr, &buf_size);
  217. if (rc || !cpu_addr || (buf_size == 0)) {
  218. CAM_ERR(CAM_UTIL, "Failed in Get cpu addr, rc=%d, cpu_addr=%pK",
  219. rc, (void *)cpu_addr);
  220. return rc;
  221. }
  222. remain_len = buf_size;
  223. if ((buf_size < sizeof(uint32_t)) ||
  224. ((size_t)cmd_buf->offset > (buf_size - sizeof(uint32_t)))) {
  225. CAM_ERR(CAM_UTIL, "Invalid offset for cmd buf: %zu",
  226. (size_t)cmd_buf->offset);
  227. return -EINVAL;
  228. }
  229. remain_len -= (size_t)cmd_buf->offset;
  230. if (remain_len < (size_t)cmd_buf->length) {
  231. CAM_ERR(CAM_UTIL, "Invalid length for cmd buf: %zu",
  232. (size_t)cmd_buf->length);
  233. return -EINVAL;
  234. }
  235. blob_ptr = (uint32_t *)(((uint8_t *)cpu_addr) +
  236. cmd_buf->offset);
  237. CAM_DBG(CAM_UTIL,
  238. "GenericCmdBuffer cpuaddr=%pK, blobptr=%pK, len=%d",
  239. (void *)cpu_addr, (void *)blob_ptr, cmd_buf->length);
  240. len_read = 0;
  241. while (len_read < cmd_buf->length) {
  242. blob_type =
  243. ((*blob_ptr) & CAM_GENERIC_BLOB_CMDBUFFER_TYPE_MASK) >>
  244. CAM_GENERIC_BLOB_CMDBUFFER_TYPE_SHIFT;
  245. blob_size =
  246. ((*blob_ptr) & CAM_GENERIC_BLOB_CMDBUFFER_SIZE_MASK) >>
  247. CAM_GENERIC_BLOB_CMDBUFFER_SIZE_SHIFT;
  248. blob_block_size = sizeof(uint32_t) +
  249. (((blob_size + sizeof(uint32_t) - 1) /
  250. sizeof(uint32_t)) * sizeof(uint32_t));
  251. CAM_DBG(CAM_UTIL,
  252. "Blob type=%d size=%d block_size=%d len_read=%d total=%d",
  253. blob_type, blob_size, blob_block_size, len_read,
  254. cmd_buf->length);
  255. if (len_read + blob_block_size > cmd_buf->length) {
  256. CAM_ERR(CAM_UTIL, "Invalid Blob %d %d %d %d",
  257. blob_type, blob_size, len_read,
  258. cmd_buf->length);
  259. rc = -EINVAL;
  260. goto end;
  261. }
  262. len_read += blob_block_size;
  263. rc = blob_handler_cb(user_data, blob_type, blob_size,
  264. (uint8_t *)(blob_ptr + 1));
  265. if (rc) {
  266. CAM_ERR(CAM_UTIL, "Error in handling blob type %d %d",
  267. blob_type, blob_size);
  268. goto end;
  269. }
  270. blob_ptr += (blob_block_size / sizeof(uint32_t));
  271. }
  272. end:
  273. return rc;
  274. }