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 - 2019 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 - 2019 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 int offset_size = copy_size; 75 76 if (le32_to_cpu(header->tlv_version) != 1) 77 return; 78 79 if (WARN_ONCE(apply_point >= IWL_FW_INI_APPLY_NUM, 80 "Invalid apply point id %d\n", apply_point)) 81 return; 82 83 if (ext) 84 data = &trans->apply_points_ext[apply_point]; 85 else 86 data = &trans->apply_points[apply_point]; 87 88 /* add room for is_alloc field in &iwl_fw_ini_allocation_data struct */ 89 if (le32_to_cpu(tlv->type) == IWL_UCODE_TLV_TYPE_BUFFER_ALLOCATION) { 90 struct iwl_fw_ini_allocation_data *buf_alloc = 91 (void *)tlv->data; 92 93 offset_size += sizeof(buf_alloc->is_alloc); 94 } 95 96 /* 97 * Make sure we still have room to copy this TLV. Offset points to the 98 * location the last copy ended. 99 */ 100 if (WARN_ONCE(data->offset + offset_size > data->size, 101 "Not enough memory for apply point %d\n", 102 apply_point)) 103 return; 104 105 memcpy(data->data + data->offset, (void *)tlv, copy_size); 106 data->offset += offset_size; 107 } 108 109 void iwl_alloc_dbg_tlv(struct iwl_trans *trans, size_t len, const u8 *data, 110 bool ext) 111 { 112 struct iwl_ucode_tlv *tlv; 113 u32 size[IWL_FW_INI_APPLY_NUM] = {0}; 114 int i; 115 116 while (len >= sizeof(*tlv)) { 117 u32 tlv_len, tlv_type, apply; 118 struct iwl_fw_ini_header *hdr; 119 120 len -= sizeof(*tlv); 121 tlv = (void *)data; 122 123 tlv_len = le32_to_cpu(tlv->length); 124 tlv_type = le32_to_cpu(tlv->type); 125 126 if (len < tlv_len) 127 return; 128 129 len -= ALIGN(tlv_len, 4); 130 data += sizeof(*tlv) + ALIGN(tlv_len, 4); 131 132 if (tlv_type < IWL_UCODE_TLV_DEBUG_BASE || 133 tlv_type > IWL_UCODE_TLV_DEBUG_MAX) 134 continue; 135 136 hdr = (void *)&tlv->data[0]; 137 apply = le32_to_cpu(hdr->apply_point); 138 139 if (le32_to_cpu(hdr->tlv_version) != 1) 140 continue; 141 142 IWL_DEBUG_FW(trans, "WRT: read TLV 0x%x, apply point %d\n", 143 le32_to_cpu(tlv->type), apply); 144 145 if (WARN_ON(apply >= IWL_FW_INI_APPLY_NUM)) 146 continue; 147 148 /* add room for is_alloc field in &iwl_fw_ini_allocation_data 149 * struct 150 */ 151 if (tlv_type == IWL_UCODE_TLV_TYPE_BUFFER_ALLOCATION) { 152 struct iwl_fw_ini_allocation_data *buf_alloc = 153 (void *)tlv->data; 154 155 size[apply] += sizeof(buf_alloc->is_alloc); 156 } 157 158 size[apply] += sizeof(*tlv) + tlv_len; 159 } 160 161 for (i = 0; i < ARRAY_SIZE(size); i++) { 162 void *mem; 163 164 if (!size[i]) 165 continue; 166 167 mem = kzalloc(size[i], GFP_KERNEL); 168 169 if (!mem) { 170 IWL_ERR(trans, "No memory for apply point %d\n", i); 171 return; 172 } 173 174 if (ext) { 175 trans->apply_points_ext[i].data = mem; 176 trans->apply_points_ext[i].size = size[i]; 177 } else { 178 trans->apply_points[i].data = mem; 179 trans->apply_points[i].size = size[i]; 180 } 181 182 trans->ini_valid = true; 183 } 184 } 185 186 void iwl_fw_dbg_free(struct iwl_trans *trans) 187 { 188 int i; 189 190 for (i = 0; i < ARRAY_SIZE(trans->apply_points); i++) { 191 kfree(trans->apply_points[i].data); 192 trans->apply_points[i].size = 0; 193 trans->apply_points[i].offset = 0; 194 195 kfree(trans->apply_points_ext[i].data); 196 trans->apply_points_ext[i].size = 0; 197 trans->apply_points_ext[i].offset = 0; 198 } 199 } 200 201 static int iwl_parse_fw_dbg_tlv(struct iwl_trans *trans, const u8 *data, 202 size_t len) 203 { 204 struct iwl_ucode_tlv *tlv; 205 enum iwl_ucode_tlv_type tlv_type; 206 u32 tlv_len; 207 208 while (len >= sizeof(*tlv)) { 209 len -= sizeof(*tlv); 210 tlv = (void *)data; 211 212 tlv_len = le32_to_cpu(tlv->length); 213 tlv_type = le32_to_cpu(tlv->type); 214 215 if (len < tlv_len) { 216 IWL_ERR(trans, "invalid TLV len: %zd/%u\n", 217 len, tlv_len); 218 return -EINVAL; 219 } 220 len -= ALIGN(tlv_len, 4); 221 data += sizeof(*tlv) + ALIGN(tlv_len, 4); 222 223 switch (tlv_type) { 224 case IWL_UCODE_TLV_TYPE_BUFFER_ALLOCATION: 225 case IWL_UCODE_TLV_TYPE_HCMD: 226 case IWL_UCODE_TLV_TYPE_REGIONS: 227 case IWL_UCODE_TLV_TYPE_TRIGGERS: 228 case IWL_UCODE_TLV_TYPE_DEBUG_FLOW: 229 iwl_fw_dbg_copy_tlv(trans, tlv, true); 230 break; 231 default: 232 WARN_ONCE(1, "Invalid TLV %x\n", tlv_type); 233 break; 234 } 235 } 236 237 return 0; 238 } 239 240 void iwl_load_fw_dbg_tlv(struct device *dev, struct iwl_trans *trans) 241 { 242 const struct firmware *fw; 243 int res; 244 245 if (trans->external_ini_loaded || !iwlwifi_mod_params.enable_ini) 246 return; 247 248 res = request_firmware(&fw, "iwl-dbg-tlv.ini", dev); 249 if (res) 250 return; 251 252 iwl_alloc_dbg_tlv(trans, fw->size, fw->data, true); 253 iwl_parse_fw_dbg_tlv(trans, fw->data, fw->size); 254 255 trans->external_ini_loaded = true; 256 release_firmware(fw); 257 } 258