1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright (C) 2018 Intel Corporation 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of version 2 of the GNU General Public License as 12 * published by the Free Software Foundation. 13 * 14 * This program is distributed in the hope that it will be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program. 21 * 22 * The full GNU General Public License is included in this distribution 23 * in the file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <linuxwifi@intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 31 * Copyright (C) 2018 Intel Corporation 32 * All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 38 * * Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * * Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in 42 * the documentation and/or other materials provided with the 43 * distribution. 44 * * Neither the name Intel Corporation nor the names of its 45 * contributors may be used to endorse or promote products derived 46 * from this software without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 49 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 50 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 51 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 52 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 53 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 54 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 55 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 56 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 57 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 58 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 59 * 60 *****************************************************************************/ 61 62 #include <linux/firmware.h> 63 #include "iwl-trans.h" 64 #include "iwl-dbg-tlv.h" 65 66 void iwl_fw_dbg_copy_tlv(struct iwl_trans *trans, struct iwl_ucode_tlv *tlv, 67 bool ext) 68 { 69 struct iwl_apply_point_data *data; 70 struct iwl_fw_ini_header *header = (void *)&tlv->data[0]; 71 u32 apply_point = le32_to_cpu(header->apply_point); 72 73 int copy_size = le32_to_cpu(tlv->length) + sizeof(*tlv); 74 75 if (WARN_ONCE(apply_point >= IWL_FW_INI_APPLY_NUM, 76 "Invalid apply point id %d\n", apply_point)) 77 return; 78 79 if (ext) 80 data = &trans->apply_points_ext[apply_point]; 81 else 82 data = &trans->apply_points[apply_point]; 83 84 /* 85 * Make sure we still have room to copy this TLV. Offset points to the 86 * location the last copy ended. 87 */ 88 if (WARN_ONCE(data->offset + copy_size > data->size, 89 "Not enough memory for apply point %d\n", 90 apply_point)) 91 return; 92 93 memcpy(data->data + data->offset, (void *)tlv, copy_size); 94 data->offset += copy_size; 95 } 96 97 void iwl_alloc_dbg_tlv(struct iwl_trans *trans, size_t len, const u8 *data, 98 bool ext) 99 { 100 struct iwl_ucode_tlv *tlv; 101 u32 size[IWL_FW_INI_APPLY_NUM] = {0}; 102 int i; 103 104 while (len >= sizeof(*tlv)) { 105 u32 tlv_len, tlv_type, apply; 106 struct iwl_fw_ini_header *hdr; 107 108 len -= sizeof(*tlv); 109 tlv = (void *)data; 110 111 tlv_len = le32_to_cpu(tlv->length); 112 tlv_type = le32_to_cpu(tlv->type); 113 114 if (len < tlv_len) 115 return; 116 117 len -= ALIGN(tlv_len, 4); 118 data += sizeof(*tlv) + ALIGN(tlv_len, 4); 119 120 if (!(tlv_type & IWL_UCODE_INI_TLV_GROUP)) 121 continue; 122 123 hdr = (void *)&tlv->data[0]; 124 apply = le32_to_cpu(hdr->apply_point); 125 126 IWL_DEBUG_FW(trans, "Read TLV %x, apply point %d\n", 127 le32_to_cpu(tlv->type), apply); 128 129 if (WARN_ON(apply >= IWL_FW_INI_APPLY_NUM)) 130 continue; 131 132 size[apply] += sizeof(*tlv) + tlv_len; 133 } 134 135 for (i = 0; i < ARRAY_SIZE(size); i++) { 136 void *mem; 137 138 if (!size[i]) 139 continue; 140 141 mem = kzalloc(size[i], GFP_KERNEL); 142 143 if (!mem) { 144 IWL_ERR(trans, "No memory for apply point %d\n", i); 145 return; 146 } 147 148 if (ext) { 149 trans->apply_points_ext[i].data = mem; 150 trans->apply_points_ext[i].size = size[i]; 151 } else { 152 trans->apply_points[i].data = mem; 153 trans->apply_points[i].size = size[i]; 154 } 155 156 trans->ini_valid = true; 157 } 158 } 159 160 void iwl_fw_dbg_free(struct iwl_trans *trans) 161 { 162 int i; 163 164 for (i = 0; i < ARRAY_SIZE(trans->apply_points); i++) { 165 kfree(trans->apply_points[i].data); 166 trans->apply_points[i].size = 0; 167 trans->apply_points[i].offset = 0; 168 169 kfree(trans->apply_points_ext[i].data); 170 trans->apply_points_ext[i].size = 0; 171 trans->apply_points_ext[i].offset = 0; 172 } 173 } 174 175 static int iwl_parse_fw_dbg_tlv(struct iwl_trans *trans, const u8 *data, 176 size_t len) 177 { 178 struct iwl_ucode_tlv *tlv; 179 enum iwl_ucode_tlv_type tlv_type; 180 u32 tlv_len; 181 182 while (len >= sizeof(*tlv)) { 183 len -= sizeof(*tlv); 184 tlv = (void *)data; 185 186 tlv_len = le32_to_cpu(tlv->length); 187 tlv_type = le32_to_cpu(tlv->type); 188 189 if (len < tlv_len) { 190 IWL_ERR(trans, "invalid TLV len: %zd/%u\n", 191 len, tlv_len); 192 return -EINVAL; 193 } 194 len -= ALIGN(tlv_len, 4); 195 data += sizeof(*tlv) + ALIGN(tlv_len, 4); 196 197 switch (tlv_type) { 198 case IWL_UCODE_TLV_TYPE_BUFFER_ALLOCATION: 199 case IWL_UCODE_TLV_TYPE_HCMD: 200 case IWL_UCODE_TLV_TYPE_REGIONS: 201 case IWL_UCODE_TLV_TYPE_TRIGGERS: 202 case IWL_UCODE_TLV_TYPE_DEBUG_FLOW: 203 iwl_fw_dbg_copy_tlv(trans, tlv, true); 204 break; 205 default: 206 WARN_ONCE(1, "Invalid TLV %x\n", tlv_type); 207 break; 208 } 209 } 210 211 return 0; 212 } 213 214 void iwl_load_fw_dbg_tlv(struct device *dev, struct iwl_trans *trans) 215 { 216 const struct firmware *fw; 217 int res; 218 219 if (trans->external_ini_loaded || !iwlwifi_mod_params.enable_ini) 220 return; 221 222 res = request_firmware(&fw, "iwl-dbg-tlv.ini", dev); 223 if (res) 224 return; 225 226 iwl_alloc_dbg_tlv(trans, fw->size, fw->data, true); 227 iwl_parse_fw_dbg_tlv(trans, fw->data, fw->size); 228 229 trans->external_ini_loaded = true; 230 release_firmware(fw); 231 } 232