Rajeev Kumar Sirasanagandla | 197d417 | 2018-02-15 19:03:29 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2018 The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| 5 | * |
| 6 | * |
| 7 | * Permission to use, copy, modify, and/or distribute this software for |
| 8 | * any purpose with or without fee is hereby granted, provided that the |
| 9 | * above copyright notice and this permission notice appear in all |
| 10 | * copies. |
| 11 | * |
| 12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| 13 | * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| 14 | * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| 15 | * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 16 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 17 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 18 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 19 | * PERFORMANCE OF THIS SOFTWARE. |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * DOC: wlan_hdd_debugfs_csr.c |
| 24 | * |
| 25 | * WLAN Host Device Driver implementation to update |
| 26 | * debugfs with roaming related information |
| 27 | */ |
| 28 | |
| 29 | #include <wlan_hdd_debugfs_csr.h> |
| 30 | #include <wlan_hdd_main.h> |
| 31 | #include <cds_sched.h> |
| 32 | #include <wma_api.h> |
| 33 | #include "qwlan_version.h" |
| 34 | #include "wmi_unified_param.h" |
| 35 | #include "wlan_hdd_debugfs.h" |
| 36 | |
| 37 | ssize_t |
| 38 | wlan_hdd_current_time_info_debugfs(uint8_t *buf, ssize_t buf_avail_len) |
| 39 | { |
| 40 | ssize_t length; |
| 41 | char time_buffer[HDD_TIME_STRING_LEN]; |
| 42 | int ret_val; |
| 43 | |
| 44 | qdf_get_time_of_the_day_in_hr_min_sec_usec(time_buffer, |
| 45 | sizeof(time_buffer)); |
| 46 | ret_val = scnprintf(buf, buf_avail_len, |
| 47 | "\nTime at which this file generated = %s\n", |
| 48 | time_buffer); |
| 49 | if (ret_val < 0) |
| 50 | return 0; |
| 51 | length = ret_val; |
| 52 | |
| 53 | return length; |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * wlan_hdd_debugfs_update_csr() - Function to update internal debugfs buffer |
| 58 | * and write into user-space buffer |
| 59 | * @hdd_ctx: hdd context |
| 60 | * @adapter: adapter |
| 61 | * @id: used to identify file for which this info has to be read |
| 62 | * @buf: output buffer to write |
| 63 | * @buf_avail_len: length of the available buffer |
| 64 | * |
| 65 | * Return: Number of bytes read on success, zero otherwise |
| 66 | */ |
| 67 | static ssize_t |
| 68 | wlan_hdd_debugfs_update_csr(struct hdd_context *hdd_ctx, |
| 69 | struct hdd_adapter *adapter, |
| 70 | enum hdd_debugfs_file_id id, |
| 71 | uint8_t *buf, |
| 72 | ssize_t buf_avail_len) |
| 73 | { |
| 74 | ssize_t len = 0; |
| 75 | |
| 76 | switch (id) { |
| 77 | case HDD_DEBUFS_FILE_ID_CONNECT_INFO: |
| 78 | /* populate connect info */ |
Rajeev Kumar Sirasanagandla | 4c8edc0 | 2018-03-12 08:44:51 +0530 | [diff] [blame] | 79 | len = wlan_hdd_debugfs_update_connect_info(hdd_ctx, adapter, |
| 80 | buf, buf_avail_len); |
Rajeev Kumar Sirasanagandla | 197d417 | 2018-02-15 19:03:29 +0530 | [diff] [blame] | 81 | break; |
| 82 | case HDD_DEBUFS_FILE_ID_ROAM_SCAN_STATS_INFO: |
| 83 | /* populate roam scan stats info */ |
| 84 | break; |
| 85 | case HDD_DEBUFS_FILE_ID_OFFLOAD_INFO: |
| 86 | /* populate offload info */ |
Rajeev Kumar Sirasanagandla | 85f8b02 | 2018-03-12 12:52:59 +0530 | [diff] [blame^] | 87 | len = wlan_hdd_debugfs_update_filters_info(hdd_ctx, adapter, |
| 88 | buf, buf_avail_len); |
Rajeev Kumar Sirasanagandla | 197d417 | 2018-02-15 19:03:29 +0530 | [diff] [blame] | 89 | break; |
| 90 | default: |
| 91 | hdd_err("Failed to fetch stats, unknown stats type"); |
| 92 | } |
| 93 | |
| 94 | return len; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * __wlan_hdd_read_debugfs_csr() - Function to read debug stats |
| 99 | * @file: file pointer |
| 100 | * @buf: buffer |
| 101 | * @count: count |
| 102 | * @pos: position pointer |
| 103 | * |
| 104 | * Return: Number of bytes read on success, zero otherwise |
| 105 | */ |
| 106 | static ssize_t |
| 107 | __wlan_hdd_read_debugfs_csr(struct file *file, char __user *buf, |
| 108 | size_t count, loff_t *pos) |
| 109 | { |
| 110 | struct wlan_hdd_debugfs_buffer_info *info; |
| 111 | struct hdd_adapter *adapter; |
| 112 | struct hdd_context *hdd_ctx; |
| 113 | int ret; |
| 114 | ssize_t length; |
| 115 | |
| 116 | hdd_enter(); |
| 117 | |
| 118 | info = file->private_data; |
| 119 | if (!info || !info->data) { |
| 120 | hdd_err("No valid private data"); |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | adapter = info->adapter; |
| 125 | if ((!adapter) || (adapter->magic != WLAN_HDD_ADAPTER_MAGIC)) { |
| 126 | hdd_err("Invalid adapter or adapter has invalid magic"); |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | hdd_ctx = WLAN_HDD_GET_CTX(adapter); |
| 131 | ret = wlan_hdd_validate_context(hdd_ctx); |
| 132 | if (ret) |
| 133 | return 0; |
| 134 | |
| 135 | if (!test_bit(DEVICE_IFACE_OPENED, &adapter->event_flags)) { |
| 136 | hdd_err("Interface is not enabled"); |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | if (*pos == 0) { |
| 141 | info->length = wlan_hdd_debugfs_update_csr(hdd_ctx, adapter, |
| 142 | info->id, |
| 143 | info->data, |
| 144 | info->max_buf_len); |
| 145 | } |
| 146 | |
| 147 | length = simple_read_from_buffer(buf, count, pos, |
| 148 | info->data, info->length); |
| 149 | hdd_debug("length written = %zu, count: %zu, pos: %lld", |
| 150 | length, count, *pos); |
| 151 | |
| 152 | hdd_exit(); |
| 153 | return length; |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * wlan_hdd_read_debugfs_csr() - SSR wrapper function to read stats |
| 158 | * @file: file pointer |
| 159 | * @buf: buffer |
| 160 | * @count: count |
| 161 | * @pos: position pointer |
| 162 | * |
| 163 | * Return: Number of bytes read on success, zero otherwise |
| 164 | */ |
| 165 | static ssize_t |
| 166 | wlan_hdd_read_debugfs_csr(struct file *file, char __user *buf, |
| 167 | size_t count, loff_t *pos) |
| 168 | { |
| 169 | int ret; |
| 170 | |
| 171 | cds_ssr_protect(__func__); |
| 172 | ret = __wlan_hdd_read_debugfs_csr(file, buf, count, pos); |
| 173 | cds_ssr_unprotect(__func__); |
| 174 | |
| 175 | return ret; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * __wlan_hdd_open_debugfs_csr() - Allocates memory for private data |
| 180 | * @inode: Pointer to inode structure |
| 181 | * @file: file pointer |
| 182 | * |
| 183 | * Return: zero |
| 184 | */ |
| 185 | static int __wlan_hdd_open_debugfs_csr(struct inode *inode, |
| 186 | struct file *file) |
| 187 | { |
| 188 | struct wlan_hdd_debugfs_buffer_info *info; |
| 189 | struct hdd_debugfs_file_info *csr; |
| 190 | struct hdd_adapter *adapter = NULL; |
| 191 | struct hdd_context *hdd_ctx; |
| 192 | int ret; |
| 193 | |
| 194 | hdd_enter(); |
| 195 | |
| 196 | csr = inode->i_private; |
| 197 | if (!csr) { |
| 198 | hdd_err("No private data"); |
| 199 | return -EINVAL; |
| 200 | } |
| 201 | |
| 202 | adapter = qdf_container_of(csr, struct hdd_adapter, |
| 203 | csr_file[csr->id]); |
| 204 | if (!adapter || (adapter->magic != WLAN_HDD_ADAPTER_MAGIC)) { |
| 205 | hdd_err("Invalid adapter or adapter has invalid magic"); |
| 206 | return -EINVAL; |
| 207 | } |
| 208 | |
| 209 | hdd_ctx = WLAN_HDD_GET_CTX(adapter); |
| 210 | ret = wlan_hdd_validate_context(hdd_ctx); |
| 211 | if (ret) |
| 212 | return -EINVAL; |
| 213 | |
| 214 | if (!test_bit(DEVICE_IFACE_OPENED, &adapter->event_flags)) { |
| 215 | hdd_err("Interface is not enabled"); |
| 216 | return -EINVAL; |
| 217 | } |
| 218 | |
| 219 | info = qdf_mem_malloc(sizeof(*info)); |
| 220 | if (!info) { |
| 221 | hdd_err("Not enough memory for file private data"); |
| 222 | return -ENOMEM; |
| 223 | } |
| 224 | |
| 225 | info->data = qdf_mem_malloc(csr->buf_max_size); |
| 226 | if (!info->data) { |
| 227 | hdd_err("roam stats debugfs buffer allocation failed"); |
| 228 | qdf_mem_free(info); |
| 229 | return -ENOMEM; |
| 230 | } |
| 231 | info->length = 0; |
| 232 | info->max_buf_len = csr->buf_max_size; |
| 233 | info->id = csr->id; |
| 234 | info->adapter = adapter; |
| 235 | |
| 236 | file->private_data = info; |
| 237 | hdd_exit(); |
| 238 | |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | /** |
| 243 | * wlan_hdd_open_debugfs_csr() - SSR wrapper function to allocate memory for |
| 244 | * private data on file open |
| 245 | * @inode: Pointer to inode structure |
| 246 | * @file: file pointer |
| 247 | * |
| 248 | * Return: zero |
| 249 | */ |
| 250 | static int wlan_hdd_open_debugfs_csr(struct inode *inode, |
| 251 | struct file *file) |
| 252 | { |
| 253 | int ret; |
| 254 | |
| 255 | cds_ssr_protect(__func__); |
| 256 | |
| 257 | hdd_debugfs_thread_increment(); |
| 258 | ret = __wlan_hdd_open_debugfs_csr(inode, file); |
| 259 | if (ret) |
| 260 | hdd_debugfs_thread_decrement(); |
| 261 | |
| 262 | cds_ssr_unprotect(__func__); |
| 263 | |
| 264 | return ret; |
| 265 | } |
| 266 | |
| 267 | /** |
| 268 | * __wlan_hdd_release_debugfs_csr() - Function to free private memory on |
| 269 | * release |
| 270 | * @inode: Pointer to inode structure |
| 271 | * @file: file pointer |
| 272 | * |
| 273 | * Return: zero |
| 274 | */ |
| 275 | static int __wlan_hdd_release_debugfs_csr(struct inode *inode, |
| 276 | struct file *file) |
| 277 | { |
| 278 | struct wlan_hdd_debugfs_buffer_info *info = file->private_data; |
| 279 | |
| 280 | hdd_enter(); |
| 281 | |
| 282 | if (!info) |
| 283 | return 0; |
| 284 | |
| 285 | file->private_data = NULL; |
| 286 | qdf_mem_free(info->data); |
| 287 | qdf_mem_free(info); |
| 288 | |
| 289 | hdd_exit(); |
| 290 | |
| 291 | return 0; |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * wlan_hdd_release_debugfs_csr() - SSR wrapper function to free |
| 296 | * private data on release |
| 297 | * @inode: Pointer to inode structure |
| 298 | * @file: file pointer |
| 299 | * |
| 300 | * Return: zero |
| 301 | */ |
| 302 | static int wlan_hdd_release_debugfs_csr(struct inode *inode, struct file *file) |
| 303 | { |
| 304 | int ret; |
| 305 | |
| 306 | cds_ssr_protect(__func__); |
| 307 | ret = __wlan_hdd_release_debugfs_csr(inode, file); |
| 308 | hdd_debugfs_thread_decrement(); |
| 309 | cds_ssr_unprotect(__func__); |
| 310 | |
| 311 | return ret; |
| 312 | } |
| 313 | |
| 314 | static const struct file_operations fops_csr_debugfs = { |
| 315 | .read = wlan_hdd_read_debugfs_csr, |
| 316 | .open = wlan_hdd_open_debugfs_csr, |
| 317 | .release = wlan_hdd_release_debugfs_csr, |
| 318 | .owner = THIS_MODULE, |
| 319 | .llseek = default_llseek, |
| 320 | }; |
| 321 | |
| 322 | void wlan_hdd_debugfs_csr_init(struct hdd_adapter *adapter) |
| 323 | { |
Rajeev Kumar Sirasanagandla | 4c8edc0 | 2018-03-12 08:44:51 +0530 | [diff] [blame] | 324 | struct hdd_debugfs_file_info *csr; |
| 325 | const uint32_t max_len = HDD_DEBUGFS_FILE_NAME_MAX; |
| 326 | |
Rajeev Kumar Sirasanagandla | 197d417 | 2018-02-15 19:03:29 +0530 | [diff] [blame] | 327 | /* |
| 328 | * Create debufs diagnostic files for connect, offload info |
| 329 | * and roam info and store in csr_file member of adapter |
| 330 | */ |
Rajeev Kumar Sirasanagandla | 4c8edc0 | 2018-03-12 08:44:51 +0530 | [diff] [blame] | 331 | |
| 332 | csr = &adapter->csr_file[HDD_DEBUFS_FILE_ID_CONNECT_INFO]; |
| 333 | if (!csr->entry) { |
| 334 | strlcpy(csr->name, "connect_info", max_len); |
| 335 | csr->id = HDD_DEBUFS_FILE_ID_CONNECT_INFO; |
| 336 | csr->buf_max_size = DEBUGFS_CONNECT_INFO_BUF_SIZE; |
| 337 | csr->entry = debugfs_create_file(csr->name, 0444, |
| 338 | adapter->debugfs_phy, |
| 339 | csr, &fops_csr_debugfs); |
| 340 | if (!csr->entry) |
| 341 | hdd_err("Failed to create debugfs file: %s", |
| 342 | csr->name); |
| 343 | } |
Rajeev Kumar Sirasanagandla | 85f8b02 | 2018-03-12 12:52:59 +0530 | [diff] [blame^] | 344 | |
| 345 | csr = &adapter->csr_file[HDD_DEBUFS_FILE_ID_OFFLOAD_INFO]; |
| 346 | if (!csr->entry) { |
| 347 | strlcpy(csr->name, "offload_info", max_len); |
| 348 | csr->id = HDD_DEBUFS_FILE_ID_OFFLOAD_INFO; |
| 349 | csr->buf_max_size = DEBUGFS_OFFLOAD_INFO_BUF_SIZE; |
| 350 | csr->entry = debugfs_create_file(csr->name, 0444, |
| 351 | adapter->debugfs_phy, |
| 352 | csr, &fops_csr_debugfs); |
| 353 | if (!csr->entry) |
| 354 | hdd_err("Failed to create generic_info debugfs file"); |
| 355 | } |
Rajeev Kumar Sirasanagandla | 197d417 | 2018-02-15 19:03:29 +0530 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | void wlan_hdd_debugfs_csr_deinit(struct hdd_adapter *adapter) |
| 359 | { |
| 360 | uint32_t i; |
| 361 | struct dentry *entry; |
| 362 | |
| 363 | for (i = 0; i < HDD_DEBUGFS_FILE_ID_MAX; i++) { |
| 364 | entry = adapter->csr_file[i].entry; |
| 365 | if (!entry) |
| 366 | continue; |
| 367 | |
| 368 | adapter->csr_file[i].entry = NULL; |
| 369 | debugfs_remove(entry); |
| 370 | entry = NULL; |
| 371 | } |
| 372 | } |