184c3c995SLuca Coelho // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 284c3c995SLuca Coelho /* 384c3c995SLuca Coelho * Copyright(c) 2021 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> 14*c593d2faSAyala 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 struct efivar_entry *pnvm_efivar; 2384c3c995SLuca Coelho void *data; 2484c3c995SLuca Coelho unsigned long package_size; 2584c3c995SLuca Coelho int err; 2684c3c995SLuca Coelho 279dad325fSLuca Coelho *len = 0; 289dad325fSLuca Coelho 2984c3c995SLuca Coelho pnvm_efivar = kzalloc(sizeof(*pnvm_efivar), GFP_KERNEL); 3084c3c995SLuca Coelho if (!pnvm_efivar) 3184c3c995SLuca Coelho return ERR_PTR(-ENOMEM); 3284c3c995SLuca Coelho 3384c3c995SLuca Coelho memcpy(&pnvm_efivar->var.VariableName, IWL_UEFI_OEM_PNVM_NAME, 3484c3c995SLuca Coelho sizeof(IWL_UEFI_OEM_PNVM_NAME)); 3584c3c995SLuca Coelho pnvm_efivar->var.VendorGuid = IWL_EFI_VAR_GUID; 3684c3c995SLuca Coelho 3784c3c995SLuca Coelho /* 3884c3c995SLuca Coelho * TODO: we hardcode a maximum length here, because reading 3984c3c995SLuca Coelho * from the UEFI is not working. To implement this properly, 4084c3c995SLuca Coelho * we have to call efivar_entry_size(). 4184c3c995SLuca Coelho */ 4284c3c995SLuca Coelho package_size = IWL_HARDCODED_PNVM_SIZE; 4384c3c995SLuca Coelho 4484c3c995SLuca Coelho data = kmalloc(package_size, GFP_KERNEL); 4584c3c995SLuca Coelho if (!data) { 4684c3c995SLuca Coelho data = ERR_PTR(-ENOMEM); 4784c3c995SLuca Coelho goto out; 4884c3c995SLuca Coelho } 4984c3c995SLuca Coelho 5084c3c995SLuca Coelho err = efivar_entry_get(pnvm_efivar, NULL, &package_size, data); 5184c3c995SLuca Coelho if (err) { 5284c3c995SLuca Coelho IWL_DEBUG_FW(trans, 531476ff21SLinus Torvalds "PNVM UEFI variable not found %d (len %lu)\n", 5484c3c995SLuca Coelho err, package_size); 5584c3c995SLuca Coelho kfree(data); 5684c3c995SLuca Coelho data = ERR_PTR(err); 5784c3c995SLuca Coelho goto out; 5884c3c995SLuca Coelho } 5984c3c995SLuca Coelho 601476ff21SLinus Torvalds IWL_DEBUG_FW(trans, "Read PNVM from UEFI with size %lu\n", package_size); 6184c3c995SLuca Coelho *len = package_size; 6284c3c995SLuca Coelho 6384c3c995SLuca Coelho out: 6484c3c995SLuca Coelho kfree(pnvm_efivar); 6584c3c995SLuca Coelho 6684c3c995SLuca Coelho return data; 6784c3c995SLuca Coelho } 689dad325fSLuca Coelho 699dad325fSLuca Coelho static void *iwl_uefi_reduce_power_section(struct iwl_trans *trans, 709dad325fSLuca Coelho const u8 *data, size_t len) 719dad325fSLuca Coelho { 729dad325fSLuca Coelho struct iwl_ucode_tlv *tlv; 739dad325fSLuca Coelho u8 *reduce_power_data = NULL, *tmp; 749dad325fSLuca Coelho u32 size = 0; 759dad325fSLuca Coelho 769dad325fSLuca Coelho IWL_DEBUG_FW(trans, "Handling REDUCE_POWER section\n"); 779dad325fSLuca Coelho 789dad325fSLuca Coelho while (len >= sizeof(*tlv)) { 799dad325fSLuca Coelho u32 tlv_len, tlv_type; 809dad325fSLuca Coelho 819dad325fSLuca Coelho len -= sizeof(*tlv); 829dad325fSLuca Coelho tlv = (void *)data; 839dad325fSLuca Coelho 849dad325fSLuca Coelho tlv_len = le32_to_cpu(tlv->length); 859dad325fSLuca Coelho tlv_type = le32_to_cpu(tlv->type); 869dad325fSLuca Coelho 879dad325fSLuca Coelho if (len < tlv_len) { 889dad325fSLuca Coelho IWL_ERR(trans, "invalid TLV len: %zd/%u\n", 899dad325fSLuca Coelho len, tlv_len); 909dad325fSLuca Coelho reduce_power_data = ERR_PTR(-EINVAL); 919dad325fSLuca Coelho goto out; 929dad325fSLuca Coelho } 939dad325fSLuca Coelho 949dad325fSLuca Coelho data += sizeof(*tlv); 959dad325fSLuca Coelho 969dad325fSLuca Coelho switch (tlv_type) { 979dad325fSLuca Coelho case IWL_UCODE_TLV_MEM_DESC: { 989dad325fSLuca Coelho IWL_DEBUG_FW(trans, 999dad325fSLuca Coelho "Got IWL_UCODE_TLV_MEM_DESC len %d\n", 1009dad325fSLuca Coelho tlv_len); 1019dad325fSLuca Coelho 1029dad325fSLuca Coelho IWL_DEBUG_FW(trans, "Adding data (size %d)\n", tlv_len); 1039dad325fSLuca Coelho 1049dad325fSLuca Coelho tmp = krealloc(reduce_power_data, size + tlv_len, GFP_KERNEL); 1059dad325fSLuca Coelho if (!tmp) { 1069dad325fSLuca Coelho IWL_DEBUG_FW(trans, 1079dad325fSLuca Coelho "Couldn't allocate (more) reduce_power_data\n"); 1089dad325fSLuca Coelho 1099dad325fSLuca Coelho reduce_power_data = ERR_PTR(-ENOMEM); 1109dad325fSLuca Coelho goto out; 1119dad325fSLuca Coelho } 1129dad325fSLuca Coelho 1139dad325fSLuca Coelho reduce_power_data = tmp; 1149dad325fSLuca Coelho 1159dad325fSLuca Coelho memcpy(reduce_power_data + size, data, tlv_len); 1169dad325fSLuca Coelho 1179dad325fSLuca Coelho size += tlv_len; 1189dad325fSLuca Coelho 1199dad325fSLuca Coelho break; 1209dad325fSLuca Coelho } 1219dad325fSLuca Coelho case IWL_UCODE_TLV_PNVM_SKU: 1229dad325fSLuca Coelho IWL_DEBUG_FW(trans, 1239dad325fSLuca Coelho "New REDUCE_POWER section started, stop parsing.\n"); 1249dad325fSLuca Coelho goto done; 1259dad325fSLuca Coelho default: 1269dad325fSLuca Coelho IWL_DEBUG_FW(trans, "Found TLV 0x%0x, len %d\n", 1279dad325fSLuca Coelho tlv_type, tlv_len); 1289dad325fSLuca Coelho break; 1299dad325fSLuca Coelho } 1309dad325fSLuca Coelho 1319dad325fSLuca Coelho len -= ALIGN(tlv_len, 4); 1329dad325fSLuca Coelho data += ALIGN(tlv_len, 4); 1339dad325fSLuca Coelho } 1349dad325fSLuca Coelho 1359dad325fSLuca Coelho done: 1369dad325fSLuca Coelho if (!size) { 1379dad325fSLuca Coelho IWL_DEBUG_FW(trans, "Empty REDUCE_POWER, skipping.\n"); 1389dad325fSLuca Coelho reduce_power_data = ERR_PTR(-ENOENT); 1399dad325fSLuca Coelho goto out; 1409dad325fSLuca Coelho } 1419dad325fSLuca Coelho 1429dad325fSLuca Coelho IWL_INFO(trans, "loaded REDUCE_POWER\n"); 1439dad325fSLuca Coelho 1449dad325fSLuca Coelho out: 1459dad325fSLuca Coelho return reduce_power_data; 1469dad325fSLuca Coelho } 1479dad325fSLuca Coelho 1489dad325fSLuca Coelho static void *iwl_uefi_reduce_power_parse(struct iwl_trans *trans, 1499dad325fSLuca Coelho const u8 *data, size_t len) 1509dad325fSLuca Coelho { 1519dad325fSLuca Coelho struct iwl_ucode_tlv *tlv; 1529dad325fSLuca Coelho void *sec_data; 1539dad325fSLuca Coelho 1549dad325fSLuca Coelho IWL_DEBUG_FW(trans, "Parsing REDUCE_POWER data\n"); 1559dad325fSLuca Coelho 1569dad325fSLuca Coelho while (len >= sizeof(*tlv)) { 1579dad325fSLuca Coelho u32 tlv_len, tlv_type; 1589dad325fSLuca Coelho 1599dad325fSLuca Coelho len -= sizeof(*tlv); 1609dad325fSLuca Coelho tlv = (void *)data; 1619dad325fSLuca Coelho 1629dad325fSLuca Coelho tlv_len = le32_to_cpu(tlv->length); 1639dad325fSLuca Coelho tlv_type = le32_to_cpu(tlv->type); 1649dad325fSLuca Coelho 1659dad325fSLuca Coelho if (len < tlv_len) { 1669dad325fSLuca Coelho IWL_ERR(trans, "invalid TLV len: %zd/%u\n", 1679dad325fSLuca Coelho len, tlv_len); 1689dad325fSLuca Coelho return ERR_PTR(-EINVAL); 1699dad325fSLuca Coelho } 1709dad325fSLuca Coelho 1719dad325fSLuca Coelho if (tlv_type == IWL_UCODE_TLV_PNVM_SKU) { 1729dad325fSLuca Coelho struct iwl_sku_id *sku_id = 1739dad325fSLuca Coelho (void *)(data + sizeof(*tlv)); 1749dad325fSLuca Coelho 1759dad325fSLuca Coelho IWL_DEBUG_FW(trans, 1769dad325fSLuca Coelho "Got IWL_UCODE_TLV_PNVM_SKU len %d\n", 1779dad325fSLuca Coelho tlv_len); 1789dad325fSLuca Coelho IWL_DEBUG_FW(trans, "sku_id 0x%0x 0x%0x 0x%0x\n", 1799dad325fSLuca Coelho le32_to_cpu(sku_id->data[0]), 1809dad325fSLuca Coelho le32_to_cpu(sku_id->data[1]), 1819dad325fSLuca Coelho le32_to_cpu(sku_id->data[2])); 1829dad325fSLuca Coelho 1839dad325fSLuca Coelho data += sizeof(*tlv) + ALIGN(tlv_len, 4); 1849dad325fSLuca Coelho len -= ALIGN(tlv_len, 4); 1859dad325fSLuca Coelho 1869dad325fSLuca Coelho if (trans->sku_id[0] == le32_to_cpu(sku_id->data[0]) && 1879dad325fSLuca Coelho trans->sku_id[1] == le32_to_cpu(sku_id->data[1]) && 1889dad325fSLuca Coelho trans->sku_id[2] == le32_to_cpu(sku_id->data[2])) { 1899dad325fSLuca Coelho sec_data = iwl_uefi_reduce_power_section(trans, 1909dad325fSLuca Coelho data, 1919dad325fSLuca Coelho len); 1929dad325fSLuca Coelho if (!IS_ERR(sec_data)) 1939dad325fSLuca Coelho return sec_data; 1949dad325fSLuca Coelho } else { 1959dad325fSLuca Coelho IWL_DEBUG_FW(trans, "SKU ID didn't match!\n"); 1969dad325fSLuca Coelho } 1979dad325fSLuca Coelho } else { 1989dad325fSLuca Coelho data += sizeof(*tlv) + ALIGN(tlv_len, 4); 1999dad325fSLuca Coelho len -= ALIGN(tlv_len, 4); 2009dad325fSLuca Coelho } 2019dad325fSLuca Coelho } 2029dad325fSLuca Coelho 2039dad325fSLuca Coelho return ERR_PTR(-ENOENT); 2049dad325fSLuca Coelho } 2059dad325fSLuca Coelho 2069dad325fSLuca Coelho void *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len) 2079dad325fSLuca Coelho { 2089dad325fSLuca Coelho struct efivar_entry *reduce_power_efivar; 2099dad325fSLuca Coelho struct pnvm_sku_package *package; 2109dad325fSLuca Coelho void *data = NULL; 2119dad325fSLuca Coelho unsigned long package_size; 2129dad325fSLuca Coelho int err; 2139dad325fSLuca Coelho 2149dad325fSLuca Coelho *len = 0; 2159dad325fSLuca Coelho 2169dad325fSLuca Coelho reduce_power_efivar = kzalloc(sizeof(*reduce_power_efivar), GFP_KERNEL); 2179dad325fSLuca Coelho if (!reduce_power_efivar) 2189dad325fSLuca Coelho return ERR_PTR(-ENOMEM); 2199dad325fSLuca Coelho 2209dad325fSLuca Coelho memcpy(&reduce_power_efivar->var.VariableName, IWL_UEFI_REDUCED_POWER_NAME, 2219dad325fSLuca Coelho sizeof(IWL_UEFI_REDUCED_POWER_NAME)); 2229dad325fSLuca Coelho reduce_power_efivar->var.VendorGuid = IWL_EFI_VAR_GUID; 2239dad325fSLuca Coelho 2249dad325fSLuca Coelho /* 2259dad325fSLuca Coelho * TODO: we hardcode a maximum length here, because reading 2269dad325fSLuca Coelho * from the UEFI is not working. To implement this properly, 2279dad325fSLuca Coelho * we have to call efivar_entry_size(). 2289dad325fSLuca Coelho */ 2299dad325fSLuca Coelho package_size = IWL_HARDCODED_REDUCE_POWER_SIZE; 2309dad325fSLuca Coelho 2319dad325fSLuca Coelho package = kmalloc(package_size, GFP_KERNEL); 2329dad325fSLuca Coelho if (!package) { 2339dad325fSLuca Coelho package = ERR_PTR(-ENOMEM); 2349dad325fSLuca Coelho goto out; 2359dad325fSLuca Coelho } 2369dad325fSLuca Coelho 2379dad325fSLuca Coelho err = efivar_entry_get(reduce_power_efivar, NULL, &package_size, package); 2389dad325fSLuca Coelho if (err) { 2399dad325fSLuca Coelho IWL_DEBUG_FW(trans, 2409dad325fSLuca Coelho "Reduced Power UEFI variable not found %d (len %lu)\n", 2419dad325fSLuca Coelho err, package_size); 2429dad325fSLuca Coelho kfree(package); 2439dad325fSLuca Coelho data = ERR_PTR(err); 2449dad325fSLuca Coelho goto out; 2459dad325fSLuca Coelho } 2469dad325fSLuca Coelho 2479dad325fSLuca Coelho IWL_DEBUG_FW(trans, "Read reduced power from UEFI with size %lu\n", 2489dad325fSLuca Coelho package_size); 2499dad325fSLuca Coelho *len = package_size; 2509dad325fSLuca Coelho 2519dad325fSLuca Coelho IWL_DEBUG_FW(trans, "rev %d, total_size %d, n_skus %d\n", 2529dad325fSLuca Coelho package->rev, package->total_size, package->n_skus); 2539dad325fSLuca Coelho 2549dad325fSLuca Coelho data = iwl_uefi_reduce_power_parse(trans, package->data, 2559dad325fSLuca Coelho *len - sizeof(*package)); 2569dad325fSLuca Coelho 2579dad325fSLuca Coelho kfree(package); 2589dad325fSLuca Coelho 2599dad325fSLuca Coelho out: 2609dad325fSLuca Coelho kfree(reduce_power_efivar); 2619dad325fSLuca Coelho 2629dad325fSLuca Coelho return data; 2639dad325fSLuca Coelho } 264*c593d2faSAyala Barazani 265*c593d2faSAyala Barazani #ifdef CONFIG_ACPI 266*c593d2faSAyala Barazani static int iwl_uefi_sgom_parse(struct uefi_cnv_wlan_sgom_data *sgom_data, 267*c593d2faSAyala Barazani struct iwl_fw_runtime *fwrt) 268*c593d2faSAyala Barazani { 269*c593d2faSAyala Barazani int i, j; 270*c593d2faSAyala Barazani 271*c593d2faSAyala Barazani if (sgom_data->revision != 1) 272*c593d2faSAyala Barazani return -EINVAL; 273*c593d2faSAyala Barazani 274*c593d2faSAyala Barazani memcpy(fwrt->sgom_table.offset_map, sgom_data->offset_map, 275*c593d2faSAyala Barazani sizeof(fwrt->sgom_table.offset_map)); 276*c593d2faSAyala Barazani 277*c593d2faSAyala Barazani for (i = 0; i < MCC_TO_SAR_OFFSET_TABLE_ROW_SIZE; i++) { 278*c593d2faSAyala Barazani for (j = 0; j < MCC_TO_SAR_OFFSET_TABLE_COL_SIZE; j++) { 279*c593d2faSAyala Barazani /* since each byte is composed of to values, */ 280*c593d2faSAyala Barazani /* one for each letter, */ 281*c593d2faSAyala Barazani /* extract and check each of them separately */ 282*c593d2faSAyala Barazani u8 value = fwrt->sgom_table.offset_map[i][j]; 283*c593d2faSAyala Barazani u8 low = value & 0xF; 284*c593d2faSAyala Barazani u8 high = (value & 0xF0) >> 4; 285*c593d2faSAyala Barazani 286*c593d2faSAyala Barazani if (high > fwrt->geo_num_profiles) 287*c593d2faSAyala Barazani high = 0; 288*c593d2faSAyala Barazani if (low > fwrt->geo_num_profiles) 289*c593d2faSAyala Barazani low = 0; 290*c593d2faSAyala Barazani fwrt->sgom_table.offset_map[i][j] = (high << 4) | low; 291*c593d2faSAyala Barazani } 292*c593d2faSAyala Barazani } 293*c593d2faSAyala Barazani 294*c593d2faSAyala Barazani fwrt->sgom_enabled = true; 295*c593d2faSAyala Barazani return 0; 296*c593d2faSAyala Barazani } 297*c593d2faSAyala Barazani 298*c593d2faSAyala Barazani void iwl_uefi_get_sgom_table(struct iwl_trans *trans, 299*c593d2faSAyala Barazani struct iwl_fw_runtime *fwrt) 300*c593d2faSAyala Barazani { 301*c593d2faSAyala Barazani struct efivar_entry *sgom_efivar; 302*c593d2faSAyala Barazani struct uefi_cnv_wlan_sgom_data *data; 303*c593d2faSAyala Barazani unsigned long package_size; 304*c593d2faSAyala Barazani int err, ret; 305*c593d2faSAyala Barazani 306*c593d2faSAyala Barazani if (!fwrt->geo_enabled) 307*c593d2faSAyala Barazani return; 308*c593d2faSAyala Barazani 309*c593d2faSAyala Barazani sgom_efivar = kzalloc(sizeof(*sgom_efivar), GFP_KERNEL); 310*c593d2faSAyala Barazani if (!sgom_efivar) 311*c593d2faSAyala Barazani return; 312*c593d2faSAyala Barazani 313*c593d2faSAyala Barazani memcpy(&sgom_efivar->var.VariableName, IWL_UEFI_SGOM_NAME, 314*c593d2faSAyala Barazani sizeof(IWL_UEFI_SGOM_NAME)); 315*c593d2faSAyala Barazani sgom_efivar->var.VendorGuid = IWL_EFI_VAR_GUID; 316*c593d2faSAyala Barazani 317*c593d2faSAyala Barazani /* TODO: we hardcode a maximum length here, because reading 318*c593d2faSAyala Barazani * from the UEFI is not working. To implement this properly, 319*c593d2faSAyala Barazani * we have to call efivar_entry_size(). 320*c593d2faSAyala Barazani */ 321*c593d2faSAyala Barazani package_size = IWL_HARDCODED_SGOM_SIZE; 322*c593d2faSAyala Barazani 323*c593d2faSAyala Barazani data = kmalloc(package_size, GFP_KERNEL); 324*c593d2faSAyala Barazani if (!data) { 325*c593d2faSAyala Barazani data = ERR_PTR(-ENOMEM); 326*c593d2faSAyala Barazani goto out; 327*c593d2faSAyala Barazani } 328*c593d2faSAyala Barazani 329*c593d2faSAyala Barazani err = efivar_entry_get(sgom_efivar, NULL, &package_size, data); 330*c593d2faSAyala Barazani if (err) { 331*c593d2faSAyala Barazani IWL_DEBUG_FW(trans, 332*c593d2faSAyala Barazani "SGOM UEFI variable not found %d\n", err); 333*c593d2faSAyala Barazani goto out_free; 334*c593d2faSAyala Barazani } 335*c593d2faSAyala Barazani 336*c593d2faSAyala Barazani IWL_DEBUG_FW(trans, "Read SGOM from UEFI with size %lu\n", 337*c593d2faSAyala Barazani package_size); 338*c593d2faSAyala Barazani 339*c593d2faSAyala Barazani ret = iwl_uefi_sgom_parse(data, fwrt); 340*c593d2faSAyala Barazani if (ret < 0) 341*c593d2faSAyala Barazani IWL_DEBUG_FW(trans, "Cannot read SGOM tables. rev is invalid\n"); 342*c593d2faSAyala Barazani 343*c593d2faSAyala Barazani out_free: 344*c593d2faSAyala Barazani kfree(data); 345*c593d2faSAyala Barazani 346*c593d2faSAyala Barazani out: 347*c593d2faSAyala Barazani kfree(sgom_efivar); 348*c593d2faSAyala Barazani } 349*c593d2faSAyala Barazani IWL_EXPORT_SYMBOL(iwl_uefi_get_sgom_table); 350*c593d2faSAyala Barazani #endif /* CONFIG_ACPI */ 351