1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright(c) 2020-2024 Intel Corporation 4 */ 5 6 #include "iwl-drv.h" 7 #include "pnvm.h" 8 #include "iwl-prph.h" 9 #include "iwl-io.h" 10 #include "fw/api/commands.h" 11 #include "fw/api/nvm-reg.h" 12 #include "fw/api/alive.h" 13 #include "fw/uefi.h" 14 15 #define IWL_PNVM_REDUCED_CAP_BIT BIT(25) 16 17 struct iwl_pnvm_section { 18 __le32 offset; 19 const u8 data[]; 20 } __packed; 21 22 static bool iwl_pnvm_complete_fn(struct iwl_notif_wait_data *notif_wait, 23 struct iwl_rx_packet *pkt, void *data) 24 { 25 struct iwl_trans *trans = (struct iwl_trans *)data; 26 struct iwl_pnvm_init_complete_ntfy *pnvm_ntf = (void *)pkt->data; 27 28 IWL_DEBUG_FW(trans, 29 "PNVM complete notification received with status 0x%0x\n", 30 le32_to_cpu(pnvm_ntf->status)); 31 32 return true; 33 } 34 35 static int iwl_pnvm_handle_section(struct iwl_trans *trans, const u8 *data, 36 size_t len, 37 struct iwl_pnvm_image *pnvm_data) 38 { 39 const struct iwl_ucode_tlv *tlv; 40 u32 sha1 = 0; 41 u16 mac_type = 0, rf_id = 0; 42 bool hw_match = false; 43 44 IWL_DEBUG_FW(trans, "Handling PNVM section\n"); 45 46 memset(pnvm_data, 0, sizeof(*pnvm_data)); 47 48 while (len >= sizeof(*tlv)) { 49 u32 tlv_len, tlv_type; 50 51 len -= sizeof(*tlv); 52 tlv = (const void *)data; 53 54 tlv_len = le32_to_cpu(tlv->length); 55 tlv_type = le32_to_cpu(tlv->type); 56 57 if (len < tlv_len) { 58 IWL_ERR(trans, "invalid TLV len: %zd/%u\n", 59 len, tlv_len); 60 return -EINVAL; 61 } 62 63 data += sizeof(*tlv); 64 65 switch (tlv_type) { 66 case IWL_UCODE_TLV_PNVM_VERSION: 67 if (tlv_len < sizeof(__le32)) { 68 IWL_DEBUG_FW(trans, 69 "Invalid size for IWL_UCODE_TLV_PNVM_VERSION (expected %zd, got %d)\n", 70 sizeof(__le32), tlv_len); 71 break; 72 } 73 74 sha1 = le32_to_cpup((const __le32 *)data); 75 76 IWL_DEBUG_FW(trans, 77 "Got IWL_UCODE_TLV_PNVM_VERSION %0x\n", 78 sha1); 79 pnvm_data->version = sha1; 80 break; 81 case IWL_UCODE_TLV_HW_TYPE: 82 if (tlv_len < 2 * sizeof(__le16)) { 83 IWL_DEBUG_FW(trans, 84 "Invalid size for IWL_UCODE_TLV_HW_TYPE (expected %zd, got %d)\n", 85 2 * sizeof(__le16), tlv_len); 86 break; 87 } 88 89 if (hw_match) 90 break; 91 92 mac_type = le16_to_cpup((const __le16 *)data); 93 rf_id = le16_to_cpup((const __le16 *)(data + sizeof(__le16))); 94 95 IWL_DEBUG_FW(trans, 96 "Got IWL_UCODE_TLV_HW_TYPE mac_type 0x%0x rf_id 0x%0x\n", 97 mac_type, rf_id); 98 99 if (mac_type == CSR_HW_REV_TYPE(trans->hw_rev) && 100 rf_id == CSR_HW_RFID_TYPE(trans->hw_rf_id)) 101 hw_match = true; 102 break; 103 case IWL_UCODE_TLV_SEC_RT: { 104 const struct iwl_pnvm_section *section = (const void *)data; 105 u32 data_len = tlv_len - sizeof(*section); 106 107 IWL_DEBUG_FW(trans, 108 "Got IWL_UCODE_TLV_SEC_RT len %d\n", 109 tlv_len); 110 111 /* TODO: remove, this is a deprecated separator */ 112 if (le32_to_cpup((const __le32 *)data) == 0xddddeeee) { 113 IWL_DEBUG_FW(trans, "Ignoring separator.\n"); 114 break; 115 } 116 117 if (pnvm_data->n_chunks == IPC_DRAM_MAP_ENTRY_NUM_MAX) { 118 IWL_DEBUG_FW(trans, 119 "too many payloads to allocate in DRAM.\n"); 120 return -EINVAL; 121 } 122 123 IWL_DEBUG_FW(trans, "Adding data (size %d)\n", 124 data_len); 125 126 pnvm_data->chunks[pnvm_data->n_chunks].data = section->data; 127 pnvm_data->chunks[pnvm_data->n_chunks].len = data_len; 128 pnvm_data->n_chunks++; 129 130 break; 131 } 132 case IWL_UCODE_TLV_MEM_DESC: 133 if (iwl_uefi_handle_tlv_mem_desc(trans, data, tlv_len, 134 pnvm_data)) 135 return -EINVAL; 136 break; 137 case IWL_UCODE_TLV_PNVM_SKU: 138 IWL_DEBUG_FW(trans, 139 "New PNVM section started, stop parsing.\n"); 140 goto done; 141 default: 142 IWL_DEBUG_FW(trans, "Found TLV 0x%0x, len %d\n", 143 tlv_type, tlv_len); 144 break; 145 } 146 147 len -= ALIGN(tlv_len, 4); 148 data += ALIGN(tlv_len, 4); 149 } 150 151 done: 152 if (!hw_match) { 153 IWL_DEBUG_FW(trans, 154 "HW mismatch, skipping PNVM section (need mac_type 0x%x rf_id 0x%x)\n", 155 CSR_HW_REV_TYPE(trans->hw_rev), 156 CSR_HW_RFID_TYPE(trans->hw_rf_id)); 157 return -ENOENT; 158 } 159 160 if (!pnvm_data->n_chunks) { 161 IWL_DEBUG_FW(trans, "Empty PNVM, skipping.\n"); 162 return -ENOENT; 163 } 164 165 return 0; 166 } 167 168 static int iwl_pnvm_parse(struct iwl_trans *trans, const u8 *data, 169 size_t len, 170 struct iwl_pnvm_image *pnvm_data) 171 { 172 const struct iwl_ucode_tlv *tlv; 173 174 IWL_DEBUG_FW(trans, "Parsing PNVM file\n"); 175 176 while (len >= sizeof(*tlv)) { 177 u32 tlv_len, tlv_type; 178 u32 rf_type; 179 180 len -= sizeof(*tlv); 181 tlv = (const void *)data; 182 183 tlv_len = le32_to_cpu(tlv->length); 184 tlv_type = le32_to_cpu(tlv->type); 185 186 if (len < tlv_len) { 187 IWL_ERR(trans, "invalid TLV len: %zd/%u\n", 188 len, tlv_len); 189 return -EINVAL; 190 } 191 192 if (tlv_type == IWL_UCODE_TLV_PNVM_SKU) { 193 const struct iwl_sku_id *sku_id = 194 (const void *)(data + sizeof(*tlv)); 195 196 IWL_DEBUG_FW(trans, 197 "Got IWL_UCODE_TLV_PNVM_SKU len %d\n", 198 tlv_len); 199 IWL_DEBUG_FW(trans, "sku_id 0x%0x 0x%0x 0x%0x\n", 200 le32_to_cpu(sku_id->data[0]), 201 le32_to_cpu(sku_id->data[1]), 202 le32_to_cpu(sku_id->data[2])); 203 204 data += sizeof(*tlv) + ALIGN(tlv_len, 4); 205 len -= ALIGN(tlv_len, 4); 206 207 trans->reduced_cap_sku = false; 208 rf_type = CSR_HW_RFID_TYPE(trans->hw_rf_id); 209 if ((trans->sku_id[0] & IWL_PNVM_REDUCED_CAP_BIT) && 210 rf_type == IWL_CFG_RF_TYPE_FM) 211 trans->reduced_cap_sku = true; 212 213 IWL_DEBUG_FW(trans, 214 "Reduced SKU device %d\n", 215 trans->reduced_cap_sku); 216 217 if (trans->sku_id[0] == le32_to_cpu(sku_id->data[0]) && 218 trans->sku_id[1] == le32_to_cpu(sku_id->data[1]) && 219 trans->sku_id[2] == le32_to_cpu(sku_id->data[2])) { 220 int ret; 221 222 ret = iwl_pnvm_handle_section(trans, data, len, 223 pnvm_data); 224 if (!ret) 225 return 0; 226 } else { 227 IWL_DEBUG_FW(trans, "SKU ID didn't match!\n"); 228 } 229 } else { 230 data += sizeof(*tlv) + ALIGN(tlv_len, 4); 231 len -= ALIGN(tlv_len, 4); 232 } 233 } 234 235 return -ENOENT; 236 } 237 238 static int iwl_pnvm_get_from_fs(struct iwl_trans *trans, u8 **data, size_t *len) 239 { 240 const struct firmware *pnvm; 241 char pnvm_name[MAX_PNVM_NAME]; 242 size_t new_len; 243 int ret; 244 245 iwl_pnvm_get_fs_name(trans, pnvm_name, sizeof(pnvm_name)); 246 247 ret = firmware_request_nowarn(&pnvm, pnvm_name, trans->dev); 248 if (ret) { 249 IWL_DEBUG_FW(trans, "PNVM file %s not found %d\n", 250 pnvm_name, ret); 251 return ret; 252 } 253 254 new_len = pnvm->size; 255 *data = kvmemdup(pnvm->data, pnvm->size, GFP_KERNEL); 256 release_firmware(pnvm); 257 258 if (!*data) 259 return -ENOMEM; 260 261 *len = new_len; 262 263 return 0; 264 } 265 266 static u8 *iwl_get_pnvm_image(struct iwl_trans *trans_p, size_t *len) 267 { 268 struct pnvm_sku_package *package; 269 u8 *image = NULL; 270 271 /* Get PNVM from BIOS for non-Intel SKU */ 272 if (trans_p->sku_id[2]) { 273 package = iwl_uefi_get_pnvm(trans_p, len); 274 if (!IS_ERR_OR_NULL(package)) { 275 if (*len >= sizeof(*package)) { 276 /* we need only the data */ 277 *len -= sizeof(*package); 278 image = kvmemdup(package->data, 279 *len, GFP_KERNEL); 280 } 281 /* 282 * free package regardless of whether kmemdup 283 * succeeded 284 */ 285 kfree(package); 286 if (image) 287 return image; 288 } 289 } 290 291 /* If it's not available, or for Intel SKU, try from the filesystem */ 292 if (iwl_pnvm_get_from_fs(trans_p, &image, len)) 293 return NULL; 294 return image; 295 } 296 297 static void iwl_pnvm_load_pnvm_to_trans(struct iwl_trans *trans, 298 const struct iwl_ucode_capabilities *capa) 299 { 300 struct iwl_pnvm_image *pnvm_data = NULL; 301 u8 *data = NULL; 302 size_t length; 303 int ret; 304 305 /* failed to get/parse the image in the past, no use trying again */ 306 if (trans->fail_to_parse_pnvm_image) 307 return; 308 309 if (trans->pnvm_loaded) 310 goto set; 311 312 data = iwl_get_pnvm_image(trans, &length); 313 if (!data) { 314 trans->fail_to_parse_pnvm_image = true; 315 return; 316 } 317 318 pnvm_data = kzalloc(sizeof(*pnvm_data), GFP_KERNEL); 319 if (!pnvm_data) 320 goto free; 321 322 ret = iwl_pnvm_parse(trans, data, length, pnvm_data); 323 if (ret) { 324 trans->fail_to_parse_pnvm_image = true; 325 goto free; 326 } 327 328 ret = iwl_trans_load_pnvm(trans, pnvm_data, capa); 329 if (ret) 330 goto free; 331 IWL_INFO(trans, "loaded PNVM version %08x\n", pnvm_data->version); 332 333 set: 334 iwl_trans_set_pnvm(trans, capa); 335 free: 336 kvfree(data); 337 kfree(pnvm_data); 338 } 339 340 static void 341 iwl_pnvm_load_reduce_power_to_trans(struct iwl_trans *trans, 342 const struct iwl_ucode_capabilities *capa) 343 { 344 struct iwl_pnvm_image *pnvm_data = NULL; 345 u8 *data = NULL; 346 size_t length; 347 int ret; 348 349 if (trans->failed_to_load_reduce_power_image) 350 return; 351 352 if (trans->reduce_power_loaded) 353 goto set; 354 355 data = iwl_uefi_get_reduced_power(trans, &length); 356 if (IS_ERR(data)) { 357 trans->failed_to_load_reduce_power_image = true; 358 return; 359 } 360 361 pnvm_data = kzalloc(sizeof(*pnvm_data), GFP_KERNEL); 362 if (!pnvm_data) 363 goto free; 364 365 ret = iwl_uefi_reduce_power_parse(trans, data, length, pnvm_data); 366 if (ret) { 367 trans->failed_to_load_reduce_power_image = true; 368 goto free; 369 } 370 371 ret = iwl_trans_load_reduce_power(trans, pnvm_data, capa); 372 if (ret) { 373 IWL_DEBUG_FW(trans, 374 "Failed to load reduce power table %d\n", 375 ret); 376 trans->failed_to_load_reduce_power_image = true; 377 goto free; 378 } 379 380 set: 381 iwl_trans_set_reduce_power(trans, capa); 382 free: 383 kfree(data); 384 kfree(pnvm_data); 385 } 386 387 int iwl_pnvm_load(struct iwl_trans *trans, 388 struct iwl_notif_wait_data *notif_wait, 389 const struct iwl_ucode_capabilities *capa) 390 { 391 struct iwl_notification_wait pnvm_wait; 392 static const u16 ntf_cmds[] = { WIDE_ID(REGULATORY_AND_NVM_GROUP, 393 PNVM_INIT_COMPLETE_NTFY) }; 394 395 /* if the SKU_ID is empty, there's nothing to do */ 396 if (!trans->sku_id[0] && !trans->sku_id[1] && !trans->sku_id[2]) 397 return 0; 398 399 iwl_pnvm_load_pnvm_to_trans(trans, capa); 400 iwl_pnvm_load_reduce_power_to_trans(trans, capa); 401 402 iwl_init_notification_wait(notif_wait, &pnvm_wait, 403 ntf_cmds, ARRAY_SIZE(ntf_cmds), 404 iwl_pnvm_complete_fn, trans); 405 406 /* kick the doorbell */ 407 iwl_write_umac_prph(trans, UREG_DOORBELL_TO_ISR6, 408 UREG_DOORBELL_TO_ISR6_PNVM); 409 410 return iwl_wait_notification(notif_wait, &pnvm_wait, 411 MVM_UCODE_PNVM_TIMEOUT); 412 } 413 IWL_EXPORT_SYMBOL(iwl_pnvm_load); 414