1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2012-2014, 2018-2020 Intel Corporation 4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH 5 * Copyright (C) 2016-2017 Intel Deutschland GmbH 6 */ 7 #include "api/commands.h" 8 #include "debugfs.h" 9 #include "dbg.h" 10 #include <linux/seq_file.h> 11 12 #define FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \ 13 struct dbgfs_##name##_data { \ 14 argtype *arg; \ 15 bool read_done; \ 16 ssize_t rlen; \ 17 char rbuf[buflen]; \ 18 }; \ 19 static int _iwl_dbgfs_##name##_open(struct inode *inode, \ 20 struct file *file) \ 21 { \ 22 struct dbgfs_##name##_data *data; \ 23 \ 24 data = kzalloc(sizeof(*data), GFP_KERNEL); \ 25 if (!data) \ 26 return -ENOMEM; \ 27 \ 28 data->read_done = false; \ 29 data->arg = inode->i_private; \ 30 file->private_data = data; \ 31 \ 32 return 0; \ 33 } 34 35 #define FWRT_DEBUGFS_READ_WRAPPER(name) \ 36 static ssize_t _iwl_dbgfs_##name##_read(struct file *file, \ 37 char __user *user_buf, \ 38 size_t count, loff_t *ppos) \ 39 { \ 40 struct dbgfs_##name##_data *data = file->private_data; \ 41 \ 42 if (!data->read_done) { \ 43 data->read_done = true; \ 44 data->rlen = iwl_dbgfs_##name##_read(data->arg, \ 45 sizeof(data->rbuf),\ 46 data->rbuf); \ 47 } \ 48 \ 49 if (data->rlen < 0) \ 50 return data->rlen; \ 51 return simple_read_from_buffer(user_buf, count, ppos, \ 52 data->rbuf, data->rlen); \ 53 } 54 55 static int _iwl_dbgfs_release(struct inode *inode, struct file *file) 56 { 57 kfree(file->private_data); 58 59 return 0; 60 } 61 62 #define _FWRT_DEBUGFS_READ_FILE_OPS(name, buflen, argtype) \ 63 FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \ 64 FWRT_DEBUGFS_READ_WRAPPER(name) \ 65 static const struct file_operations iwl_dbgfs_##name##_ops = { \ 66 .read = _iwl_dbgfs_##name##_read, \ 67 .open = _iwl_dbgfs_##name##_open, \ 68 .llseek = generic_file_llseek, \ 69 .release = _iwl_dbgfs_release, \ 70 } 71 72 #define FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype) \ 73 static ssize_t _iwl_dbgfs_##name##_write(struct file *file, \ 74 const char __user *user_buf, \ 75 size_t count, loff_t *ppos) \ 76 { \ 77 argtype *arg = \ 78 ((struct dbgfs_##name##_data *)file->private_data)->arg;\ 79 char buf[buflen] = {}; \ 80 size_t buf_size = min(count, sizeof(buf) - 1); \ 81 \ 82 if (copy_from_user(buf, user_buf, buf_size)) \ 83 return -EFAULT; \ 84 \ 85 return iwl_dbgfs_##name##_write(arg, buf, buf_size); \ 86 } 87 88 #define _FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, buflen, argtype) \ 89 FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \ 90 FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype) \ 91 FWRT_DEBUGFS_READ_WRAPPER(name) \ 92 static const struct file_operations iwl_dbgfs_##name##_ops = { \ 93 .write = _iwl_dbgfs_##name##_write, \ 94 .read = _iwl_dbgfs_##name##_read, \ 95 .open = _iwl_dbgfs_##name##_open, \ 96 .llseek = generic_file_llseek, \ 97 .release = _iwl_dbgfs_release, \ 98 } 99 100 #define _FWRT_DEBUGFS_WRITE_FILE_OPS(name, buflen, argtype) \ 101 FWRT_DEBUGFS_OPEN_WRAPPER(name, buflen, argtype) \ 102 FWRT_DEBUGFS_WRITE_WRAPPER(name, buflen, argtype) \ 103 static const struct file_operations iwl_dbgfs_##name##_ops = { \ 104 .write = _iwl_dbgfs_##name##_write, \ 105 .open = _iwl_dbgfs_##name##_open, \ 106 .llseek = generic_file_llseek, \ 107 .release = _iwl_dbgfs_release, \ 108 } 109 110 #define FWRT_DEBUGFS_READ_FILE_OPS(name, bufsz) \ 111 _FWRT_DEBUGFS_READ_FILE_OPS(name, bufsz, struct iwl_fw_runtime) 112 113 #define FWRT_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \ 114 _FWRT_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct iwl_fw_runtime) 115 116 #define FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \ 117 _FWRT_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct iwl_fw_runtime) 118 119 #define FWRT_DEBUGFS_ADD_FILE_ALIAS(alias, name, parent, mode) do { \ 120 debugfs_create_file(alias, mode, parent, fwrt, \ 121 &iwl_dbgfs_##name##_ops); \ 122 } while (0) 123 #define FWRT_DEBUGFS_ADD_FILE(name, parent, mode) \ 124 FWRT_DEBUGFS_ADD_FILE_ALIAS(#name, name, parent, mode) 125 126 static int iwl_dbgfs_enabled_severities_write(struct iwl_fw_runtime *fwrt, 127 char *buf, size_t count) 128 { 129 struct iwl_dbg_host_event_cfg_cmd event_cfg; 130 struct iwl_host_cmd hcmd = { 131 .id = WIDE_ID(DEBUG_GROUP, HOST_EVENT_CFG), 132 .flags = CMD_ASYNC, 133 .data[0] = &event_cfg, 134 .len[0] = sizeof(event_cfg), 135 }; 136 u32 enabled_severities; 137 int ret = kstrtou32(buf, 10, &enabled_severities); 138 139 if (ret < 0) 140 return ret; 141 142 event_cfg.enabled_severities = cpu_to_le32(enabled_severities); 143 144 if (fwrt->ops && fwrt->ops->send_hcmd) 145 ret = fwrt->ops->send_hcmd(fwrt->ops_ctx, &hcmd); 146 else 147 ret = -EPERM; 148 149 IWL_INFO(fwrt, 150 "sent host event cfg with enabled_severities: %u, ret: %d\n", 151 enabled_severities, ret); 152 153 return ret ?: count; 154 } 155 156 FWRT_DEBUGFS_WRITE_FILE_OPS(enabled_severities, 16); 157 158 static void iwl_fw_timestamp_marker_wk(struct work_struct *work) 159 { 160 int ret; 161 struct iwl_fw_runtime *fwrt = 162 container_of(work, struct iwl_fw_runtime, timestamp.wk.work); 163 unsigned long delay = fwrt->timestamp.delay; 164 165 ret = iwl_fw_send_timestamp_marker_cmd(fwrt); 166 if (!ret && delay) 167 schedule_delayed_work(&fwrt->timestamp.wk, 168 round_jiffies_relative(delay)); 169 else 170 IWL_INFO(fwrt, 171 "stopping timestamp_marker, ret: %d, delay: %u\n", 172 ret, jiffies_to_msecs(delay) / 1000); 173 } 174 175 void iwl_fw_trigger_timestamp(struct iwl_fw_runtime *fwrt, u32 delay) 176 { 177 IWL_INFO(fwrt, 178 "starting timestamp_marker trigger with delay: %us\n", 179 delay); 180 181 iwl_fw_cancel_timestamp(fwrt); 182 183 fwrt->timestamp.delay = msecs_to_jiffies(delay * 1000); 184 185 schedule_delayed_work(&fwrt->timestamp.wk, 186 round_jiffies_relative(fwrt->timestamp.delay)); 187 } 188 189 static ssize_t iwl_dbgfs_timestamp_marker_write(struct iwl_fw_runtime *fwrt, 190 char *buf, size_t count) 191 { 192 int ret; 193 u32 delay; 194 195 ret = kstrtou32(buf, 10, &delay); 196 if (ret < 0) 197 return ret; 198 199 iwl_fw_trigger_timestamp(fwrt, delay); 200 201 return count; 202 } 203 204 static ssize_t iwl_dbgfs_timestamp_marker_read(struct iwl_fw_runtime *fwrt, 205 size_t size, char *buf) 206 { 207 u32 delay_secs = jiffies_to_msecs(fwrt->timestamp.delay) / 1000; 208 209 return scnprintf(buf, size, "%d\n", delay_secs); 210 } 211 212 FWRT_DEBUGFS_READ_WRITE_FILE_OPS(timestamp_marker, 16); 213 214 struct hcmd_write_data { 215 __be32 cmd_id; 216 __be32 flags; 217 __be16 length; 218 u8 data[]; 219 } __packed; 220 221 static ssize_t iwl_dbgfs_send_hcmd_write(struct iwl_fw_runtime *fwrt, char *buf, 222 size_t count) 223 { 224 size_t header_size = (sizeof(u32) * 2 + sizeof(u16)) * 2; 225 size_t data_size = (count - 1) / 2; 226 int ret; 227 struct hcmd_write_data *data; 228 struct iwl_host_cmd hcmd = { 229 .len = { 0, }, 230 .data = { NULL, }, 231 }; 232 233 if (fwrt->ops && fwrt->ops->fw_running && 234 !fwrt->ops->fw_running(fwrt->ops_ctx)) 235 return -EIO; 236 237 if (count < header_size + 1 || count > 1024 * 4) 238 return -EINVAL; 239 240 data = kmalloc(data_size, GFP_KERNEL); 241 if (!data) 242 return -ENOMEM; 243 244 ret = hex2bin((u8 *)data, buf, data_size); 245 if (ret) 246 goto out; 247 248 hcmd.id = be32_to_cpu(data->cmd_id); 249 hcmd.flags = be32_to_cpu(data->flags); 250 hcmd.len[0] = be16_to_cpu(data->length); 251 hcmd.data[0] = data->data; 252 253 if (count != header_size + hcmd.len[0] * 2 + 1) { 254 IWL_ERR(fwrt, 255 "host command data size does not match header length\n"); 256 ret = -EINVAL; 257 goto out; 258 } 259 260 if (fwrt->ops && fwrt->ops->send_hcmd) 261 ret = fwrt->ops->send_hcmd(fwrt->ops_ctx, &hcmd); 262 else 263 ret = -EPERM; 264 265 if (ret < 0) 266 goto out; 267 268 if (hcmd.flags & CMD_WANT_SKB) 269 iwl_free_resp(&hcmd); 270 out: 271 kfree(data); 272 return ret ?: count; 273 } 274 275 FWRT_DEBUGFS_WRITE_FILE_OPS(send_hcmd, 512); 276 277 static ssize_t iwl_dbgfs_fw_dbg_domain_read(struct iwl_fw_runtime *fwrt, 278 size_t size, char *buf) 279 { 280 return scnprintf(buf, size, "0x%08x\n", 281 fwrt->trans->dbg.domains_bitmap); 282 } 283 284 FWRT_DEBUGFS_READ_FILE_OPS(fw_dbg_domain, 20); 285 286 struct iwl_dbgfs_fw_info_priv { 287 struct iwl_fw_runtime *fwrt; 288 }; 289 290 struct iwl_dbgfs_fw_info_state { 291 loff_t pos; 292 }; 293 294 static void *iwl_dbgfs_fw_info_seq_next(struct seq_file *seq, 295 void *v, loff_t *pos) 296 { 297 struct iwl_dbgfs_fw_info_state *state = v; 298 struct iwl_dbgfs_fw_info_priv *priv = seq->private; 299 const struct iwl_fw *fw = priv->fwrt->fw; 300 301 *pos = ++state->pos; 302 if (*pos >= fw->ucode_capa.n_cmd_versions) { 303 kfree(state); 304 return NULL; 305 } 306 307 return state; 308 } 309 310 static void iwl_dbgfs_fw_info_seq_stop(struct seq_file *seq, 311 void *v) 312 { 313 kfree(v); 314 } 315 316 static void *iwl_dbgfs_fw_info_seq_start(struct seq_file *seq, loff_t *pos) 317 { 318 struct iwl_dbgfs_fw_info_priv *priv = seq->private; 319 const struct iwl_fw *fw = priv->fwrt->fw; 320 struct iwl_dbgfs_fw_info_state *state; 321 322 if (*pos >= fw->ucode_capa.n_cmd_versions) 323 return NULL; 324 325 state = kzalloc(sizeof(*state), GFP_KERNEL); 326 if (!state) 327 return NULL; 328 state->pos = *pos; 329 return state; 330 }; 331 332 static int iwl_dbgfs_fw_info_seq_show(struct seq_file *seq, void *v) 333 { 334 struct iwl_dbgfs_fw_info_state *state = v; 335 struct iwl_dbgfs_fw_info_priv *priv = seq->private; 336 const struct iwl_fw *fw = priv->fwrt->fw; 337 const struct iwl_fw_cmd_version *ver; 338 u32 cmd_id; 339 int has_capa; 340 341 if (!state->pos) { 342 seq_puts(seq, "fw_capa:\n"); 343 has_capa = fw_has_capa(&fw->ucode_capa, 344 IWL_UCODE_TLV_CAPA_PPAG_CHINA_BIOS_SUPPORT) ? 1 : 0; 345 seq_printf(seq, 346 " %d: %d\n", 347 IWL_UCODE_TLV_CAPA_PPAG_CHINA_BIOS_SUPPORT, 348 has_capa); 349 seq_puts(seq, "fw_api_ver:\n"); 350 } 351 352 ver = &fw->ucode_capa.cmd_versions[state->pos]; 353 354 cmd_id = WIDE_ID(ver->group, ver->cmd); 355 356 seq_printf(seq, " 0x%04x:\n", cmd_id); 357 seq_printf(seq, " name: %s\n", 358 iwl_get_cmd_string(priv->fwrt->trans, cmd_id)); 359 seq_printf(seq, " cmd_ver: %d\n", ver->cmd_ver); 360 seq_printf(seq, " notif_ver: %d\n", ver->notif_ver); 361 return 0; 362 } 363 364 static const struct seq_operations iwl_dbgfs_info_seq_ops = { 365 .start = iwl_dbgfs_fw_info_seq_start, 366 .next = iwl_dbgfs_fw_info_seq_next, 367 .stop = iwl_dbgfs_fw_info_seq_stop, 368 .show = iwl_dbgfs_fw_info_seq_show, 369 }; 370 371 static int iwl_dbgfs_fw_info_open(struct inode *inode, struct file *filp) 372 { 373 struct iwl_dbgfs_fw_info_priv *priv; 374 375 priv = __seq_open_private(filp, &iwl_dbgfs_info_seq_ops, 376 sizeof(*priv)); 377 378 if (!priv) 379 return -ENOMEM; 380 381 priv->fwrt = inode->i_private; 382 return 0; 383 } 384 385 static const struct file_operations iwl_dbgfs_fw_info_ops = { 386 .owner = THIS_MODULE, 387 .open = iwl_dbgfs_fw_info_open, 388 .read = seq_read, 389 .llseek = seq_lseek, 390 .release = seq_release_private, 391 }; 392 393 void iwl_fwrt_dbgfs_register(struct iwl_fw_runtime *fwrt, 394 struct dentry *dbgfs_dir) 395 { 396 INIT_DELAYED_WORK(&fwrt->timestamp.wk, iwl_fw_timestamp_marker_wk); 397 FWRT_DEBUGFS_ADD_FILE(timestamp_marker, dbgfs_dir, 0200); 398 FWRT_DEBUGFS_ADD_FILE(fw_info, dbgfs_dir, 0200); 399 FWRT_DEBUGFS_ADD_FILE(send_hcmd, dbgfs_dir, 0200); 400 FWRT_DEBUGFS_ADD_FILE(enabled_severities, dbgfs_dir, 0200); 401 FWRT_DEBUGFS_ADD_FILE(fw_dbg_domain, dbgfs_dir, 0400); 402 } 403