probe_roms.c revision dbb0743a58825d94f1b3fdfa90a8d61dfef88f7b
1d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams/* 2d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * This file is provided under a dual BSD/GPLv2 license. When using or 3d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * redistributing this file, you may do so under either license. 4d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * 5d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * GPL LICENSE SUMMARY 6d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * 7d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. 8d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * 9d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * This program is free software; you can redistribute it and/or modify 10d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * it under the terms of version 2 of the GNU General Public License as 11d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * published by the Free Software Foundation. 12d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * 13d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * This program is distributed in the hope that it will be useful, but 14d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * WITHOUT ANY WARRANTY; without even the implied warranty of 15d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * General Public License for more details. 17d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * 18d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * You should have received a copy of the GNU General Public License 19d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * along with this program; if not, write to the Free Software 20d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 21d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * The full GNU General Public License is included in this distribution 22d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * in the file called LICENSE.GPL. 23d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams */ 24d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 25d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams/* probe_roms - scan for oem parameters */ 26d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 27d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams#include <linux/kernel.h> 28d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams#include <linux/firmware.h> 29d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams#include <linux/uaccess.h> 308db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang#include <linux/efi.h> 31d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams#include <asm/probe_roms.h> 32d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 33d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams#include "isci.h" 34d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams#include "task.h" 35d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams#include "probe_roms.h" 36d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 37bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiangstatic efi_char16_t isci_efivar_name[] = 38bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang {'R', 's', 't', 'S', 'c', 'u', 'O'}; 398db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang 40d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williamsstruct isci_orom *isci_request_oprom(struct pci_dev *pdev) 41d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams{ 42d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams void __iomem *oprom = pci_map_biosrom(pdev); 43d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams struct isci_orom *rom = NULL; 44d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams size_t len, i; 453b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams int j; 463b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams char oem_sig[4]; 473b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams struct isci_oem_hdr oem_hdr; 483b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams u8 *tmp, sum; 49d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 50d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams if (!oprom) 51d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams return NULL; 52d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 53d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams len = pci_biosrom_size(pdev); 54d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams rom = devm_kzalloc(&pdev->dev, sizeof(*rom), GFP_KERNEL); 552e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang if (!rom) { 562e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang dev_warn(&pdev->dev, 572e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang "Unable to allocate memory for orom\n"); 582e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang return NULL; 592e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang } 60d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 613b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams for (i = 0; i < len && rom; i += ISCI_OEM_SIG_SIZE) { 623b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams memcpy_fromio(oem_sig, oprom + i, ISCI_OEM_SIG_SIZE); 63d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 643b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams /* we think we found the OEM table */ 653b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams if (memcmp(oem_sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) == 0) { 663b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams size_t copy_len; 673b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams 683b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams memcpy_fromio(&oem_hdr, oprom + i, sizeof(oem_hdr)); 693b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams 703b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams copy_len = min(oem_hdr.len - sizeof(oem_hdr), 713b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams sizeof(*rom)); 723b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams 733b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams memcpy_fromio(rom, 743b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams oprom + i + sizeof(oem_hdr), 753b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams copy_len); 763b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams 773b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams /* calculate checksum */ 783b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams tmp = (u8 *)&oem_hdr; 793b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams for (j = 0, sum = 0; j < sizeof(oem_hdr); j++, tmp++) 803b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams sum += *tmp; 813b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams 823b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams tmp = (u8 *)rom; 833b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams for (j = 0; j < sizeof(*rom); j++, tmp++) 843b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams sum += *tmp; 853b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams 863b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams if (sum != 0) { 873b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams dev_warn(&pdev->dev, 883b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams "OEM table checksum failed\n"); 893b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams continue; 903b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams } 913b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams 923b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams /* keep going if that's not the oem param table */ 933b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams if (memcmp(rom->hdr.signature, 943b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams ISCI_ROM_SIG, 953b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams ISCI_ROM_SIG_SIZE) != 0) 963b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams continue; 973b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams 983b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams dev_info(&pdev->dev, 993b67c1f376acb24b7c6679f75275ac5a96792986Dan Williams "OEM parameter table found in OROM\n"); 100d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams break; 101d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams } 102d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams } 103d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 104d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams if (i >= len) { 105d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams dev_err(&pdev->dev, "oprom parse error\n"); 106d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams devm_kfree(&pdev->dev, rom); 107d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams rom = NULL; 108d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams } 109d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams pci_unmap_biosrom(oprom); 110d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 111d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams return rom; 112d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams} 113d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 114d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams/** 115d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * isci_parse_oem_parameters() - This method will take OEM parameters 116d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * from the module init parameters and copy them to oem_params. This will 117d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * only copy values that are not set to the module parameter default values 118d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * @oem_parameters: This parameter specifies the controller default OEM 119d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * parameters. It is expected that this has been initialized to the default 120d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * parameters for the controller 121d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * 122d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams * 123d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams */ 124d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williamsenum sci_status isci_parse_oem_parameters(union scic_oem_parameters *oem_params, 125d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams struct isci_orom *orom, int scu_index) 126d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams{ 127d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams /* check for valid inputs */ 12802839a8b51002d90e4b7c52bf37531834b063f71Dave Jiang if (scu_index < 0 || scu_index > SCI_MAX_CONTROLLERS || 12902839a8b51002d90e4b7c52bf37531834b063f71Dave Jiang scu_index > orom->hdr.num_elements || !oem_params) 130d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams return -EINVAL; 131d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 1324711ba10b13891edf228944a9d0a21dfe7fe90f0Dan Williams oem_params->sds1 = orom->ctrl[scu_index]; 133d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams return 0; 134d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams} 135d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 136d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williamsstruct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw) 137d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams{ 138d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams struct isci_orom *orom = NULL, *data; 139dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala int i, j; 140d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 141d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams if (request_firmware(&fw, ISCI_FW_NAME, &pdev->dev) != 0) 142d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams return NULL; 143d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 144d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams if (fw->size < sizeof(*orom)) 145d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams goto out; 146d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 147d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams data = (struct isci_orom *)fw->data; 148d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 149d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams if (strncmp(ISCI_ROM_SIG, data->hdr.signature, 150d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams strlen(ISCI_ROM_SIG)) != 0) 151d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams goto out; 152d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 153d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams orom = devm_kzalloc(&pdev->dev, fw->size, GFP_KERNEL); 154d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams if (!orom) 155d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams goto out; 156d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 157d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams memcpy(orom, fw->data, fw->size); 158d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 159dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala /* 160dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala * deprecated: override default amp_control for pre-preproduction 161dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala * silicon revisions 162dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala */ 163dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala if (isci_si_rev <= ISCI_SI_REVB0) 164dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala goto out; 165dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala 166dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala for (i = 0; i < ARRAY_SIZE(orom->ctrl); i++) 167dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala for (j = 0; j < ARRAY_SIZE(orom->ctrl[i].phys); j++) { 168dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala orom->ctrl[i].phys[j].afe_tx_amp_control0 = 0xe7c03; 169dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala orom->ctrl[i].phys[j].afe_tx_amp_control1 = 0xe7c03; 170dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala orom->ctrl[i].phys[j].afe_tx_amp_control2 = 0xe7c03; 171dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala orom->ctrl[i].phys[j].afe_tx_amp_control3 = 0xe7c03; 172dbb0743a58825d94f1b3fdfa90a8d61dfef88f7bAdam Gruchala } 173d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams out: 174d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams release_firmware(fw); 175d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams 176d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams return orom; 177d044af17aacd03a1f4fced1af4b7570d205c8fd9Dan Williams} 1788db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang 1798db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiangstatic struct efi *get_efi(void) 1808db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang{ 181bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang#ifdef CONFIG_EFI 1828db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang return &efi; 183bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang#else 1848db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang return NULL; 185bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang#endif 1868db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang} 1878db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang 1888db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiangstruct isci_orom *isci_get_efi_var(struct pci_dev *pdev) 1898db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang{ 1908db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang efi_status_t status; 191bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang struct isci_orom *rom; 1922e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang struct isci_oem_hdr *oem_hdr; 1932e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang u8 *tmp, sum; 1942e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang int j; 195bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang ssize_t data_len; 196bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang u8 *efi_data; 197bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang u32 efi_attrib = 0; 1988db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang 199bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang data_len = 1024; 200bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang efi_data = devm_kzalloc(&pdev->dev, data_len, GFP_KERNEL); 201bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang if (!efi_data) { 2028db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang dev_warn(&pdev->dev, 203bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang "Unable to allocate memory for EFI data\n"); 2048db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang return NULL; 2058db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang } 2068db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang 207bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang rom = (struct isci_orom *)(efi_data + sizeof(struct isci_oem_hdr)); 2088db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang 2098db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang if (get_efi()) 210bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang status = get_efi()->get_variable(isci_efivar_name, 211bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang &ISCI_EFI_VENDOR_GUID, 212bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang &efi_attrib, 213bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang &data_len, 214bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang efi_data); 2158db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang else 2168db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang status = EFI_NOT_FOUND; 2178db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang 2182e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang if (status != EFI_SUCCESS) { 2198db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang dev_warn(&pdev->dev, 220bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang "Unable to obtain EFI var data for OEM parms\n"); 2212e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang return NULL; 2222e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang } 2232e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang 224bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang oem_hdr = (struct isci_oem_hdr *)efi_data; 2258db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang 2262e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang if (memcmp(oem_hdr->sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) != 0) { 2278db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang dev_warn(&pdev->dev, 2282e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang "Invalid OEM header signature\n"); 2292e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang return NULL; 2302e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang } 2318db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang 2322e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang /* calculate checksum */ 233bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang tmp = (u8 *)efi_data; 234bf482c6069b514b7fe57a048ae1b6f11cf3bb10cDave Jiang for (j = 0, sum = 0; j < (sizeof(*oem_hdr) + sizeof(*rom)); j++, tmp++) 2352e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang sum += *tmp; 2362e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang 2372e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang if (sum != 0) { 2382e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang dev_warn(&pdev->dev, 2392e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang "OEM table checksum failed\n"); 2402e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang return NULL; 2412e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang } 2422e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang 2432e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang if (memcmp(rom->hdr.signature, 2442e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang ISCI_ROM_SIG, 2452e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang ISCI_ROM_SIG_SIZE) != 0) { 2462e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang dev_warn(&pdev->dev, 2472e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang "Invalid OEM table signature\n"); 2482e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang return NULL; 2492e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang } 2502e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang 2512e8320f751030a12efc3e64ee857bfa4647f81feDave Jiang return rom; 2528db37aabaceb3dcd18754c1e782d4474e4052c81Dave Jiang} 253