184c3c995SLuca Coelho // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 284c3c995SLuca Coelho /* 3*380bf72dSAlon Giladi * Copyright(c) 2021-2023 Intel Corporation 484c3c995SLuca Coelho */ 584c3c995SLuca Coelho 684c3c995SLuca Coelho #include "iwl-drv.h" 784c3c995SLuca Coelho #include "pnvm.h" 884c3c995SLuca Coelho #include "iwl-prph.h" 984c3c995SLuca Coelho #include "iwl-io.h" 1084c3c995SLuca Coelho 1184c3c995SLuca Coelho #include "fw/uefi.h" 129dad325fSLuca Coelho #include "fw/api/alive.h" 1384c3c995SLuca Coelho #include <linux/efi.h> 14c593d2faSAyala Barazani #include "fw/runtime.h" 1584c3c995SLuca Coelho 1684c3c995SLuca Coelho #define IWL_EFI_VAR_GUID EFI_GUID(0x92daaf2f, 0xc02b, 0x455b, \ 1784c3c995SLuca Coelho 0xb2, 0xec, 0xf5, 0xa3, \ 1884c3c995SLuca Coelho 0x59, 0x4f, 0x4a, 0xea) 1984c3c995SLuca Coelho 2084c3c995SLuca Coelho void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len) 2184c3c995SLuca Coelho { 2284c3c995SLuca Coelho void *data; 2384c3c995SLuca Coelho unsigned long package_size; 240c4bad7fSArd Biesheuvel efi_status_t status; 2584c3c995SLuca Coelho 269dad325fSLuca Coelho *len = 0; 279dad325fSLuca Coelho 280c4bad7fSArd Biesheuvel if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) 290c4bad7fSArd Biesheuvel return ERR_PTR(-ENODEV); 3084c3c995SLuca Coelho 3184c3c995SLuca Coelho /* 3284c3c995SLuca Coelho * TODO: we hardcode a maximum length here, because reading 3384c3c995SLuca Coelho * from the UEFI is not working. To implement this properly, 3484c3c995SLuca Coelho * we have to call efivar_entry_size(). 3584c3c995SLuca Coelho */ 3684c3c995SLuca Coelho package_size = IWL_HARDCODED_PNVM_SIZE; 3784c3c995SLuca Coelho 3884c3c995SLuca Coelho data = kmalloc(package_size, GFP_KERNEL); 390c4bad7fSArd Biesheuvel if (!data) 400c4bad7fSArd Biesheuvel return ERR_PTR(-ENOMEM); 4184c3c995SLuca Coelho 420c4bad7fSArd Biesheuvel status = efi.get_variable(IWL_UEFI_OEM_PNVM_NAME, &IWL_EFI_VAR_GUID, 430c4bad7fSArd Biesheuvel NULL, &package_size, data); 440c4bad7fSArd Biesheuvel if (status != EFI_SUCCESS) { 4584c3c995SLuca Coelho IWL_DEBUG_FW(trans, 460c4bad7fSArd Biesheuvel "PNVM UEFI variable not found 0x%lx (len %lu)\n", 470c4bad7fSArd Biesheuvel status, package_size); 4884c3c995SLuca Coelho kfree(data); 490c4bad7fSArd Biesheuvel return ERR_PTR(-ENOENT); 5084c3c995SLuca Coelho } 5184c3c995SLuca Coelho 521476ff21SLinus Torvalds IWL_DEBUG_FW(trans, "Read PNVM from UEFI with size %lu\n", package_size); 5384c3c995SLuca Coelho *len = package_size; 5484c3c995SLuca Coelho 5584c3c995SLuca Coelho return data; 5684c3c995SLuca Coelho } 579dad325fSLuca Coelho 58ea3571f4SAlon Giladi static int iwl_uefi_reduce_power_section(struct iwl_trans *trans, 59ea3571f4SAlon Giladi const u8 *data, size_t len, 60ea3571f4SAlon Giladi struct iwl_pnvm_image *pnvm_data) 619dad325fSLuca Coelho { 6286e8e657SJohannes Berg const struct iwl_ucode_tlv *tlv; 639dad325fSLuca Coelho 649dad325fSLuca Coelho IWL_DEBUG_FW(trans, "Handling REDUCE_POWER section\n"); 65ea3571f4SAlon Giladi memset(pnvm_data, 0, sizeof(*pnvm_data)); 669dad325fSLuca Coelho 679dad325fSLuca Coelho while (len >= sizeof(*tlv)) { 689dad325fSLuca Coelho u32 tlv_len, tlv_type; 699dad325fSLuca Coelho 709dad325fSLuca Coelho len -= sizeof(*tlv); 7186e8e657SJohannes Berg tlv = (const void *)data; 729dad325fSLuca Coelho 739dad325fSLuca Coelho tlv_len = le32_to_cpu(tlv->length); 749dad325fSLuca Coelho tlv_type = le32_to_cpu(tlv->type); 759dad325fSLuca Coelho 769dad325fSLuca Coelho if (len < tlv_len) { 779dad325fSLuca Coelho IWL_ERR(trans, "invalid TLV len: %zd/%u\n", 789dad325fSLuca Coelho len, tlv_len); 79ea3571f4SAlon Giladi return -EINVAL; 809dad325fSLuca Coelho } 819dad325fSLuca Coelho 829dad325fSLuca Coelho data += sizeof(*tlv); 839dad325fSLuca Coelho 849dad325fSLuca Coelho switch (tlv_type) { 859dad325fSLuca Coelho case IWL_UCODE_TLV_MEM_DESC: { 869dad325fSLuca Coelho IWL_DEBUG_FW(trans, 879dad325fSLuca Coelho "Got IWL_UCODE_TLV_MEM_DESC len %d\n", 889dad325fSLuca Coelho tlv_len); 899dad325fSLuca Coelho 90ea3571f4SAlon Giladi if (pnvm_data->n_chunks == IPC_DRAM_MAP_ENTRY_NUM_MAX) { 919dad325fSLuca Coelho IWL_DEBUG_FW(trans, 92ea3571f4SAlon Giladi "too many payloads to allocate in DRAM.\n"); 93ea3571f4SAlon Giladi return -EINVAL; 949dad325fSLuca Coelho } 959dad325fSLuca Coelho 96ea3571f4SAlon Giladi IWL_DEBUG_FW(trans, "Adding data (size %d)\n", tlv_len); 979dad325fSLuca Coelho 98ea3571f4SAlon Giladi pnvm_data->chunks[pnvm_data->n_chunks].data = data; 99ea3571f4SAlon Giladi pnvm_data->chunks[pnvm_data->n_chunks].len = tlv_len; 100ea3571f4SAlon Giladi pnvm_data->n_chunks++; 1019dad325fSLuca Coelho 1029dad325fSLuca Coelho break; 1039dad325fSLuca Coelho } 1049dad325fSLuca Coelho case IWL_UCODE_TLV_PNVM_SKU: 1059dad325fSLuca Coelho IWL_DEBUG_FW(trans, 1069dad325fSLuca Coelho "New REDUCE_POWER section started, stop parsing.\n"); 1079dad325fSLuca Coelho goto done; 1089dad325fSLuca Coelho default: 1099dad325fSLuca Coelho IWL_DEBUG_FW(trans, "Found TLV 0x%0x, len %d\n", 1109dad325fSLuca Coelho tlv_type, tlv_len); 1119dad325fSLuca Coelho break; 1129dad325fSLuca Coelho } 1139dad325fSLuca Coelho 1149dad325fSLuca Coelho len -= ALIGN(tlv_len, 4); 1159dad325fSLuca Coelho data += ALIGN(tlv_len, 4); 1169dad325fSLuca Coelho } 1179dad325fSLuca Coelho 1189dad325fSLuca Coelho done: 119ea3571f4SAlon Giladi if (!pnvm_data->n_chunks) { 1209dad325fSLuca Coelho IWL_DEBUG_FW(trans, "Empty REDUCE_POWER, skipping.\n"); 121ea3571f4SAlon Giladi return -ENOENT; 122ea3571f4SAlon Giladi } 123ea3571f4SAlon Giladi return 0; 1249dad325fSLuca Coelho } 1259dad325fSLuca Coelho 126*380bf72dSAlon Giladi int iwl_uefi_reduce_power_parse(struct iwl_trans *trans, 127ea3571f4SAlon Giladi const u8 *data, size_t len, 128ea3571f4SAlon Giladi struct iwl_pnvm_image *pnvm_data) 1299dad325fSLuca Coelho { 13086e8e657SJohannes Berg const struct iwl_ucode_tlv *tlv; 1319dad325fSLuca Coelho 1329dad325fSLuca Coelho IWL_DEBUG_FW(trans, "Parsing REDUCE_POWER data\n"); 1339dad325fSLuca Coelho 1349dad325fSLuca Coelho while (len >= sizeof(*tlv)) { 1359dad325fSLuca Coelho u32 tlv_len, tlv_type; 1369dad325fSLuca Coelho 1379dad325fSLuca Coelho len -= sizeof(*tlv); 13886e8e657SJohannes Berg tlv = (const void *)data; 1399dad325fSLuca Coelho 1409dad325fSLuca Coelho tlv_len = le32_to_cpu(tlv->length); 1419dad325fSLuca Coelho tlv_type = le32_to_cpu(tlv->type); 1429dad325fSLuca Coelho 1439dad325fSLuca Coelho if (len < tlv_len) { 1449dad325fSLuca Coelho IWL_ERR(trans, "invalid TLV len: %zd/%u\n", 1459dad325fSLuca Coelho len, tlv_len); 146ea3571f4SAlon Giladi return -EINVAL; 1479dad325fSLuca Coelho } 1489dad325fSLuca Coelho 1499dad325fSLuca Coelho if (tlv_type == IWL_UCODE_TLV_PNVM_SKU) { 15086e8e657SJohannes Berg const struct iwl_sku_id *sku_id = 15186e8e657SJohannes Berg (const void *)(data + sizeof(*tlv)); 1529dad325fSLuca Coelho 1539dad325fSLuca Coelho IWL_DEBUG_FW(trans, 1549dad325fSLuca Coelho "Got IWL_UCODE_TLV_PNVM_SKU len %d\n", 1559dad325fSLuca Coelho tlv_len); 1569dad325fSLuca Coelho IWL_DEBUG_FW(trans, "sku_id 0x%0x 0x%0x 0x%0x\n", 1579dad325fSLuca Coelho le32_to_cpu(sku_id->data[0]), 1589dad325fSLuca Coelho le32_to_cpu(sku_id->data[1]), 1599dad325fSLuca Coelho le32_to_cpu(sku_id->data[2])); 1609dad325fSLuca Coelho 1619dad325fSLuca Coelho data += sizeof(*tlv) + ALIGN(tlv_len, 4); 1629dad325fSLuca Coelho len -= ALIGN(tlv_len, 4); 1639dad325fSLuca Coelho 1649dad325fSLuca Coelho if (trans->sku_id[0] == le32_to_cpu(sku_id->data[0]) && 1659dad325fSLuca Coelho trans->sku_id[1] == le32_to_cpu(sku_id->data[1]) && 1669dad325fSLuca Coelho trans->sku_id[2] == le32_to_cpu(sku_id->data[2])) { 167ea3571f4SAlon Giladi int ret = iwl_uefi_reduce_power_section(trans, 168ea3571f4SAlon Giladi data, len, 169ea3571f4SAlon Giladi pnvm_data); 170ea3571f4SAlon Giladi if (!ret) 171ea3571f4SAlon Giladi return 0; 1729dad325fSLuca Coelho } else { 1739dad325fSLuca Coelho IWL_DEBUG_FW(trans, "SKU ID didn't match!\n"); 1749dad325fSLuca Coelho } 1759dad325fSLuca Coelho } else { 1769dad325fSLuca Coelho data += sizeof(*tlv) + ALIGN(tlv_len, 4); 1779dad325fSLuca Coelho len -= ALIGN(tlv_len, 4); 1789dad325fSLuca Coelho } 1799dad325fSLuca Coelho } 1809dad325fSLuca Coelho 181ea3571f4SAlon Giladi return -ENOENT; 1829dad325fSLuca Coelho } 1839dad325fSLuca Coelho 184*380bf72dSAlon Giladi u8 *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len) 1859dad325fSLuca Coelho { 1869dad325fSLuca Coelho struct pnvm_sku_package *package; 1879dad325fSLuca Coelho unsigned long package_size; 1880c4bad7fSArd Biesheuvel efi_status_t status; 189*380bf72dSAlon Giladi u8 *data; 1909dad325fSLuca Coelho 1910c4bad7fSArd Biesheuvel if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) 192*380bf72dSAlon Giladi return ERR_PTR(-ENODEV); 1939dad325fSLuca Coelho 1949dad325fSLuca Coelho /* 1959dad325fSLuca Coelho * TODO: we hardcode a maximum length here, because reading 1969dad325fSLuca Coelho * from the UEFI is not working. To implement this properly, 1979dad325fSLuca Coelho * we have to call efivar_entry_size(). 1989dad325fSLuca Coelho */ 1999dad325fSLuca Coelho package_size = IWL_HARDCODED_REDUCE_POWER_SIZE; 2009dad325fSLuca Coelho 2019dad325fSLuca Coelho package = kmalloc(package_size, GFP_KERNEL); 2020c4bad7fSArd Biesheuvel if (!package) 203*380bf72dSAlon Giladi return ERR_PTR(-ENOMEM); 2049dad325fSLuca Coelho 2050c4bad7fSArd Biesheuvel status = efi.get_variable(IWL_UEFI_REDUCED_POWER_NAME, &IWL_EFI_VAR_GUID, 206f4d4ba46SAlon Giladi NULL, &package_size, package); 2070c4bad7fSArd Biesheuvel if (status != EFI_SUCCESS) { 2089dad325fSLuca Coelho IWL_DEBUG_FW(trans, 2090c4bad7fSArd Biesheuvel "Reduced Power UEFI variable not found 0x%lx (len %lu)\n", 2100c4bad7fSArd Biesheuvel status, package_size); 2119dad325fSLuca Coelho kfree(package); 212*380bf72dSAlon Giladi return ERR_PTR(-ENOENT); 2139dad325fSLuca Coelho } 2149dad325fSLuca Coelho 2159dad325fSLuca Coelho IWL_DEBUG_FW(trans, "Read reduced power from UEFI with size %lu\n", 2169dad325fSLuca Coelho package_size); 2179dad325fSLuca Coelho 2189dad325fSLuca Coelho IWL_DEBUG_FW(trans, "rev %d, total_size %d, n_skus %d\n", 2199dad325fSLuca Coelho package->rev, package->total_size, package->n_skus); 2209dad325fSLuca Coelho 221*380bf72dSAlon Giladi *len = package_size - sizeof(*package); 222*380bf72dSAlon Giladi data = kmemdup(package->data, *len, GFP_KERNEL); 223*380bf72dSAlon Giladi if (!data) 224*380bf72dSAlon Giladi return ERR_PTR(-ENOMEM); 2259dad325fSLuca Coelho kfree(package); 2269dad325fSLuca Coelho 227*380bf72dSAlon Giladi return data; 2289dad325fSLuca Coelho } 229c593d2faSAyala Barazani 23009b4c35dSAyala Barazani static int iwl_uefi_step_parse(struct uefi_cnv_common_step_data *common_step_data, 23109b4c35dSAyala Barazani struct iwl_trans *trans) 23209b4c35dSAyala Barazani { 23309b4c35dSAyala Barazani if (common_step_data->revision != 1) 23409b4c35dSAyala Barazani return -EINVAL; 23509b4c35dSAyala Barazani 23609b4c35dSAyala Barazani trans->mbx_addr_0_step = (u32)common_step_data->revision | 23709b4c35dSAyala Barazani (u32)common_step_data->cnvi_eq_channel << 8 | 23809b4c35dSAyala Barazani (u32)common_step_data->cnvr_eq_channel << 16 | 23909b4c35dSAyala Barazani (u32)common_step_data->radio1 << 24; 24009b4c35dSAyala Barazani trans->mbx_addr_1_step = (u32)common_step_data->radio2; 24109b4c35dSAyala Barazani return 0; 24209b4c35dSAyala Barazani } 24309b4c35dSAyala Barazani 24409b4c35dSAyala Barazani void iwl_uefi_get_step_table(struct iwl_trans *trans) 24509b4c35dSAyala Barazani { 24609b4c35dSAyala Barazani struct uefi_cnv_common_step_data *data; 24709b4c35dSAyala Barazani unsigned long package_size; 24809b4c35dSAyala Barazani efi_status_t status; 24909b4c35dSAyala Barazani int ret; 25009b4c35dSAyala Barazani 25109b4c35dSAyala Barazani if (trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_AX210) 25209b4c35dSAyala Barazani return; 25309b4c35dSAyala Barazani 25409b4c35dSAyala Barazani if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) 25509b4c35dSAyala Barazani return; 25609b4c35dSAyala Barazani 25709b4c35dSAyala Barazani /* TODO: we hardcode a maximum length here, because reading 25809b4c35dSAyala Barazani * from the UEFI is not working. To implement this properly, 25909b4c35dSAyala Barazani * we have to call efivar_entry_size(). 26009b4c35dSAyala Barazani */ 26109b4c35dSAyala Barazani package_size = IWL_HARDCODED_STEP_SIZE; 26209b4c35dSAyala Barazani 26309b4c35dSAyala Barazani data = kmalloc(package_size, GFP_KERNEL); 26409b4c35dSAyala Barazani if (!data) 26509b4c35dSAyala Barazani return; 26609b4c35dSAyala Barazani 26709b4c35dSAyala Barazani status = efi.get_variable(IWL_UEFI_STEP_NAME, &IWL_EFI_VAR_GUID, 26809b4c35dSAyala Barazani NULL, &package_size, data); 26909b4c35dSAyala Barazani if (status != EFI_SUCCESS) { 27009b4c35dSAyala Barazani IWL_DEBUG_FW(trans, 27109b4c35dSAyala Barazani "STEP UEFI variable not found 0x%lx\n", status); 27209b4c35dSAyala Barazani goto out_free; 27309b4c35dSAyala Barazani } 27409b4c35dSAyala Barazani 27509b4c35dSAyala Barazani IWL_DEBUG_FW(trans, "Read STEP from UEFI with size %lu\n", 27609b4c35dSAyala Barazani package_size); 27709b4c35dSAyala Barazani 27809b4c35dSAyala Barazani ret = iwl_uefi_step_parse(data, trans); 27909b4c35dSAyala Barazani if (ret < 0) 28009b4c35dSAyala Barazani IWL_DEBUG_FW(trans, "Cannot read STEP tables. rev is invalid\n"); 28109b4c35dSAyala Barazani 28209b4c35dSAyala Barazani out_free: 28309b4c35dSAyala Barazani kfree(data); 28409b4c35dSAyala Barazani } 28509b4c35dSAyala Barazani IWL_EXPORT_SYMBOL(iwl_uefi_get_step_table); 28609b4c35dSAyala Barazani 287c593d2faSAyala Barazani #ifdef CONFIG_ACPI 288c593d2faSAyala Barazani static int iwl_uefi_sgom_parse(struct uefi_cnv_wlan_sgom_data *sgom_data, 289c593d2faSAyala Barazani struct iwl_fw_runtime *fwrt) 290c593d2faSAyala Barazani { 291c593d2faSAyala Barazani int i, j; 292c593d2faSAyala Barazani 293c593d2faSAyala Barazani if (sgom_data->revision != 1) 294c593d2faSAyala Barazani return -EINVAL; 295c593d2faSAyala Barazani 296c593d2faSAyala Barazani memcpy(fwrt->sgom_table.offset_map, sgom_data->offset_map, 297c593d2faSAyala Barazani sizeof(fwrt->sgom_table.offset_map)); 298c593d2faSAyala Barazani 299c593d2faSAyala Barazani for (i = 0; i < MCC_TO_SAR_OFFSET_TABLE_ROW_SIZE; i++) { 300c593d2faSAyala Barazani for (j = 0; j < MCC_TO_SAR_OFFSET_TABLE_COL_SIZE; j++) { 301c593d2faSAyala Barazani /* since each byte is composed of to values, */ 302c593d2faSAyala Barazani /* one for each letter, */ 303c593d2faSAyala Barazani /* extract and check each of them separately */ 304c593d2faSAyala Barazani u8 value = fwrt->sgom_table.offset_map[i][j]; 305c593d2faSAyala Barazani u8 low = value & 0xF; 306c593d2faSAyala Barazani u8 high = (value & 0xF0) >> 4; 307c593d2faSAyala Barazani 308c593d2faSAyala Barazani if (high > fwrt->geo_num_profiles) 309c593d2faSAyala Barazani high = 0; 310c593d2faSAyala Barazani if (low > fwrt->geo_num_profiles) 311c593d2faSAyala Barazani low = 0; 312c593d2faSAyala Barazani fwrt->sgom_table.offset_map[i][j] = (high << 4) | low; 313c593d2faSAyala Barazani } 314c593d2faSAyala Barazani } 315c593d2faSAyala Barazani 316c593d2faSAyala Barazani fwrt->sgom_enabled = true; 317c593d2faSAyala Barazani return 0; 318c593d2faSAyala Barazani } 319c593d2faSAyala Barazani 320c593d2faSAyala Barazani void iwl_uefi_get_sgom_table(struct iwl_trans *trans, 321c593d2faSAyala Barazani struct iwl_fw_runtime *fwrt) 322c593d2faSAyala Barazani { 323c593d2faSAyala Barazani struct uefi_cnv_wlan_sgom_data *data; 324c593d2faSAyala Barazani unsigned long package_size; 3250c4bad7fSArd Biesheuvel efi_status_t status; 3260c4bad7fSArd Biesheuvel int ret; 327c593d2faSAyala Barazani 3280c4bad7fSArd Biesheuvel if (!fwrt->geo_enabled || 3290c4bad7fSArd Biesheuvel !efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) 330c593d2faSAyala Barazani return; 331c593d2faSAyala Barazani 332c593d2faSAyala Barazani /* TODO: we hardcode a maximum length here, because reading 333c593d2faSAyala Barazani * from the UEFI is not working. To implement this properly, 334c593d2faSAyala Barazani * we have to call efivar_entry_size(). 335c593d2faSAyala Barazani */ 336c593d2faSAyala Barazani package_size = IWL_HARDCODED_SGOM_SIZE; 337c593d2faSAyala Barazani 338c593d2faSAyala Barazani data = kmalloc(package_size, GFP_KERNEL); 3390c4bad7fSArd Biesheuvel if (!data) 3400c4bad7fSArd Biesheuvel return; 341c593d2faSAyala Barazani 3420c4bad7fSArd Biesheuvel status = efi.get_variable(IWL_UEFI_SGOM_NAME, &IWL_EFI_VAR_GUID, 3430c4bad7fSArd Biesheuvel NULL, &package_size, data); 3440c4bad7fSArd Biesheuvel if (status != EFI_SUCCESS) { 345c593d2faSAyala Barazani IWL_DEBUG_FW(trans, 3460c4bad7fSArd Biesheuvel "SGOM UEFI variable not found 0x%lx\n", status); 347c593d2faSAyala Barazani goto out_free; 348c593d2faSAyala Barazani } 349c593d2faSAyala Barazani 350c593d2faSAyala Barazani IWL_DEBUG_FW(trans, "Read SGOM from UEFI with size %lu\n", 351c593d2faSAyala Barazani package_size); 352c593d2faSAyala Barazani 353c593d2faSAyala Barazani ret = iwl_uefi_sgom_parse(data, fwrt); 354c593d2faSAyala Barazani if (ret < 0) 355c593d2faSAyala Barazani IWL_DEBUG_FW(trans, "Cannot read SGOM tables. rev is invalid\n"); 356c593d2faSAyala Barazani 357c593d2faSAyala Barazani out_free: 358c593d2faSAyala Barazani kfree(data); 359c593d2faSAyala Barazani 360c593d2faSAyala Barazani } 361c593d2faSAyala Barazani IWL_EXPORT_SYMBOL(iwl_uefi_get_sgom_table); 362c593d2faSAyala Barazani #endif /* CONFIG_ACPI */ 363