tinlin | 9abd17f | 2019-08-14 13:29:44 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2019 The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * Permission to use, copy, modify, and/or distribute this software for |
| 5 | * any purpose with or without fee is hereby granted, provided that the |
| 6 | * above copyright notice and this permission notice appear in all |
| 7 | * copies. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| 10 | * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| 11 | * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| 12 | * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 13 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 14 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 15 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 16 | * PERFORMANCE OF THIS SOFTWARE. |
| 17 | */ |
| 18 | |
| 19 | /** |
| 20 | * DOC: wlan_hdd_debugfs_mibstat.c |
| 21 | * |
| 22 | * WLAN Host Device Driver implementation to update |
| 23 | * debugfs with MIB statistics |
| 24 | */ |
| 25 | |
| 26 | #include <cds_sched.h> |
| 27 | #include "osif_sync.h" |
| 28 | #include <wlan_hdd_debugfs_mibstat.h> |
| 29 | #include <wlan_hdd_stats.h> |
| 30 | #include <wma_api.h> |
| 31 | |
| 32 | struct mib_stats_buf { |
| 33 | ssize_t len; |
| 34 | uint8_t *result; |
| 35 | }; |
| 36 | |
| 37 | static struct mib_stats_buf mib_stats; |
| 38 | |
| 39 | qdf_mutex_t mibstats_lock; |
| 40 | |
| 41 | void hdd_debugfs_process_mib_stats(struct hdd_adapter *adapter, |
| 42 | struct stats_event *stats) |
| 43 | { |
| 44 | ssize_t len = 0; |
| 45 | uint8_t *buffer; |
| 46 | |
| 47 | hdd_enter(); |
| 48 | |
| 49 | qdf_mutex_acquire(&mibstats_lock); |
| 50 | if (!mib_stats.result) { |
| 51 | qdf_mutex_release(&mibstats_lock); |
| 52 | hdd_err("MIB statistics buffer is NULL"); |
| 53 | return; |
| 54 | } |
| 55 | |
| 56 | buffer = mib_stats.result; |
| 57 | buffer += mib_stats.len; |
| 58 | |
| 59 | len = scnprintf(buffer, DEBUGFS_MIBSTATS_BUF_SIZE - mib_stats.len, |
| 60 | "dot11RTSSuccessCount %d " |
| 61 | "\ndot11RTSFailureCount %d " |
| 62 | "\ndot11QosFailedCount %d " |
| 63 | "\ndot11QosRetryCount %d " |
| 64 | "\ndot11QosTransmittedFrameCount %d " |
| 65 | "\ndot11QosMPDUsReceivedCount %d " |
| 66 | "\ndot11TransmittedAMPDUCount %d " |
| 67 | "\ndot11QosACKFailureCount %d", |
| 68 | stats->mib_stats->mib_mac_statistics.rts_success_cnt, |
| 69 | stats->mib_stats->mib_mac_statistics.rts_fail_cnt, |
| 70 | stats->mib_stats->mib_qos_counters.qos_failed_cnt, |
| 71 | stats->mib_stats->mib_qos_counters.qos_retry_cnt, |
| 72 | stats->mib_stats->mib_qos_counters.qos_tx_frame_cnt, |
| 73 | stats->mib_stats->mib_qos_counters.qos_mpdu_rx_cnt, |
| 74 | stats->mib_stats->mib_counters_group3.tx_ampdu_cnt, |
| 75 | stats->mib_stats-> |
| 76 | mib_qos_counters.tx_qos_ack_fail_cnt_up |
| 77 | ); |
| 78 | |
| 79 | buffer += len; |
| 80 | mib_stats.len += len; |
| 81 | qdf_mutex_release(&mibstats_lock); |
| 82 | |
| 83 | hdd_exit(); |
| 84 | } |
| 85 | |
| 86 | static inline void wlan_hdd_mibstats_free_buf(void) |
| 87 | { |
| 88 | qdf_mutex_acquire(&mibstats_lock); |
| 89 | qdf_mem_free(mib_stats.result); |
| 90 | mib_stats.result = NULL; |
| 91 | mib_stats.len = 0; |
| 92 | qdf_mutex_release(&mibstats_lock); |
| 93 | } |
| 94 | |
| 95 | static int wlan_hdd_mibstats_alloc_buf(void) |
| 96 | { |
| 97 | qdf_mutex_acquire(&mibstats_lock); |
| 98 | if (mib_stats.result) { |
| 99 | qdf_mutex_release(&mibstats_lock); |
| 100 | hdd_err("Buffer is already allocated"); |
| 101 | return 0; |
| 102 | } |
| 103 | mib_stats.len = 0; |
| 104 | mib_stats.result = qdf_mem_malloc(DEBUGFS_MIBSTATS_BUF_SIZE); |
| 105 | if (!mib_stats.result) { |
| 106 | qdf_mutex_release(&mibstats_lock); |
| 107 | return -EINVAL; |
| 108 | } |
| 109 | qdf_mutex_release(&mibstats_lock); |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * hdd_debugfs_mib_stats_update() - Update userspace with local stats buffer |
| 115 | * @buf: userspace buffer (to which data is being copied into) |
| 116 | * @count: max data that can be copied into buf in bytes |
| 117 | * @pos: offset (where data should be copied into) |
| 118 | * |
| 119 | * This function copies mib statistics buffer into debugfs |
| 120 | * entry. |
| 121 | * |
| 122 | * Return: number of characters copied; 0 on no-copy |
| 123 | */ |
| 124 | static ssize_t hdd_debugfs_mib_stats_update(char __user *buf, |
| 125 | size_t count, loff_t *pos) |
| 126 | { |
| 127 | ssize_t ret_cnt; |
| 128 | |
| 129 | hdd_enter(); |
| 130 | qdf_mutex_acquire(&mibstats_lock); |
| 131 | if (!mib_stats.result) { |
| 132 | qdf_mutex_release(&mibstats_lock); |
| 133 | hdd_err("Trying to read from NULL buffer"); |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | ret_cnt = simple_read_from_buffer(buf, count, pos, |
| 138 | mib_stats.result, |
| 139 | mib_stats.len); |
| 140 | qdf_mutex_release(&mibstats_lock); |
| 141 | hdd_debug("mib stats read req: count: %zu, pos: %lld", count, *pos); |
| 142 | |
| 143 | hdd_exit(); |
| 144 | return ret_cnt; |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * __wlan_hdd_release_mib_stats_debugfs() - Function to free private |
| 149 | * memory on release |
| 150 | * @net_dev: net_device context used to register the debugfs file |
| 151 | * |
| 152 | * Return: Errno |
| 153 | */ |
| 154 | static int __wlan_hdd_release_mib_stats_debugfs(struct net_device *net_dev) |
| 155 | |
| 156 | { |
| 157 | struct hdd_adapter *adapter = WLAN_HDD_GET_PRIV_PTR(net_dev); |
| 158 | struct hdd_context *hdd_ctx; |
| 159 | int errno; |
| 160 | |
| 161 | hdd_enter_dev(net_dev); |
| 162 | |
| 163 | hdd_ctx = WLAN_HDD_GET_CTX(adapter); |
| 164 | errno = wlan_hdd_validate_context(hdd_ctx); |
| 165 | if (errno) |
| 166 | return errno; |
| 167 | |
| 168 | wlan_hdd_mibstats_free_buf(); |
| 169 | |
| 170 | hdd_exit(); |
| 171 | |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * wlan_hdd_release_mib_stats_debugfs() - SSR wrapper function to free |
| 177 | * private memory on release |
| 178 | * @inode: Pointer to inode structure |
| 179 | * @file: file pointer |
| 180 | * |
| 181 | * Return: Errno |
| 182 | */ |
| 183 | static int wlan_hdd_release_mib_stats_debugfs(struct inode *inode, |
| 184 | struct file *file) |
| 185 | { |
| 186 | struct net_device *net_dev = file_inode(file)->i_private; |
| 187 | struct osif_vdev_sync *vdev_sync; |
| 188 | int errno; |
| 189 | |
| 190 | errno = osif_vdev_sync_op_start(net_dev, &vdev_sync); |
| 191 | if (errno) |
| 192 | return errno; |
| 193 | |
| 194 | errno = __wlan_hdd_release_mib_stats_debugfs(net_dev); |
| 195 | |
| 196 | osif_vdev_sync_op_stop(vdev_sync); |
| 197 | |
| 198 | return errno; |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * __wlan_hdd_read_mib_stats_debugfs() - mib_stats debugfs handler |
| 203 | * @net_dev: net_device context used to register the debugfs file |
| 204 | * @buf: text being written to the debugfs |
| 205 | * @count: size of @buf |
| 206 | * @pos: (unused) offset into the virtual file system |
| 207 | * |
| 208 | * Return: Number of bytes read on success, error number otherwise |
| 209 | */ |
| 210 | static ssize_t __wlan_hdd_read_mib_stats_debugfs(struct net_device *net_dev, |
| 211 | char __user *buf, |
| 212 | size_t count, loff_t *pos) |
| 213 | |
| 214 | { |
| 215 | struct hdd_adapter *adapter = WLAN_HDD_GET_PRIV_PTR(net_dev); |
| 216 | struct hdd_context *hdd_ctx; |
| 217 | ssize_t ret; |
| 218 | |
| 219 | hdd_enter_dev(net_dev); |
| 220 | |
| 221 | hdd_ctx = WLAN_HDD_GET_CTX(adapter); |
| 222 | ret = wlan_hdd_validate_context(hdd_ctx); |
| 223 | if (ret) |
| 224 | goto free_buf; |
| 225 | |
| 226 | if (*pos == 0) { |
| 227 | ret = wlan_hdd_get_mib_stats(adapter); |
| 228 | if (ret) |
| 229 | goto free_buf; |
| 230 | } |
| 231 | |
| 232 | /* All the events are received and buffer is populated */ |
| 233 | ret = hdd_debugfs_mib_stats_update(buf, count, pos); |
| 234 | hdd_debug("%zu characters written into debugfs", ret); |
| 235 | |
| 236 | hdd_exit(); |
| 237 | |
| 238 | return ret; |
| 239 | |
| 240 | free_buf: |
| 241 | wlan_hdd_mibstats_free_buf(); |
| 242 | |
| 243 | hdd_exit(); |
| 244 | |
| 245 | return ret; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * wlan_hdd_read_mib_stats_debugfs() - SSR wrapper function to read |
| 250 | * mib stats |
| 251 | * @file: file pointer |
| 252 | * @buf: buffer |
| 253 | * @count: count |
| 254 | * @pos: position pointer |
| 255 | * |
| 256 | * Return: Number of bytes read on success, error number otherwise |
| 257 | */ |
| 258 | static ssize_t wlan_hdd_read_mib_stats_debugfs(struct file *file, |
| 259 | char __user *buf, size_t count, |
| 260 | loff_t *pos) |
| 261 | { |
| 262 | struct net_device *net_dev = file_inode(file)->i_private; |
| 263 | struct osif_vdev_sync *vdev_sync; |
| 264 | ssize_t err_size; |
| 265 | |
| 266 | err_size = osif_vdev_sync_op_start(net_dev, &vdev_sync); |
| 267 | if (err_size) |
| 268 | return err_size; |
| 269 | |
| 270 | err_size = __wlan_hdd_read_mib_stats_debugfs(net_dev, buf, |
| 271 | count, pos); |
| 272 | |
| 273 | osif_vdev_sync_op_stop(vdev_sync); |
| 274 | |
| 275 | return err_size; |
| 276 | } |
| 277 | |
| 278 | /** |
| 279 | * __wlan_hdd_open_mib_stats_debugfs() - Function to save private on open |
| 280 | * @net_dev: net_device context used to register the debugfs file |
| 281 | * |
| 282 | * Return: Errno |
| 283 | */ |
| 284 | static int __wlan_hdd_open_mib_stats_debugfs(struct net_device *net_dev) |
| 285 | { |
| 286 | struct hdd_adapter *adapter = WLAN_HDD_GET_PRIV_PTR(net_dev); |
| 287 | struct hdd_context *hdd_ctx; |
| 288 | int errno; |
| 289 | |
| 290 | hdd_enter_dev(net_dev); |
| 291 | |
| 292 | errno = hdd_validate_adapter(adapter); |
| 293 | if (errno) |
| 294 | return errno; |
| 295 | |
| 296 | hdd_ctx = WLAN_HDD_GET_CTX(adapter); |
| 297 | errno = wlan_hdd_validate_context(hdd_ctx); |
| 298 | if (errno) |
| 299 | return errno; |
| 300 | |
| 301 | errno = wlan_hdd_mibstats_alloc_buf(); |
| 302 | if (errno) |
| 303 | return errno; |
| 304 | |
| 305 | hdd_exit(); |
| 306 | |
| 307 | return 0; |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * wlan_hdd_open_mib_stats_debugfs() - SSR wrapper to save private |
| 312 | * on open |
| 313 | * @inode: Pointer to inode structure |
| 314 | * @file: file pointer |
| 315 | * |
| 316 | * Return: Errno |
| 317 | */ |
| 318 | static int wlan_hdd_open_mib_stats_debugfs(struct inode *inode, |
| 319 | struct file *file) |
| 320 | { |
| 321 | struct net_device *net_dev = inode->i_private; |
| 322 | struct osif_vdev_sync *vdev_sync; |
| 323 | int errno; |
| 324 | |
| 325 | errno = osif_vdev_sync_op_start(net_dev, &vdev_sync); |
| 326 | if (errno) |
| 327 | return errno; |
| 328 | |
| 329 | errno = __wlan_hdd_open_mib_stats_debugfs(net_dev); |
| 330 | |
| 331 | osif_vdev_sync_op_stop(vdev_sync); |
| 332 | |
| 333 | return errno; |
| 334 | } |
| 335 | |
| 336 | static const struct file_operations fops_mib_stats = { |
| 337 | .read = wlan_hdd_read_mib_stats_debugfs, |
| 338 | .open = wlan_hdd_open_mib_stats_debugfs, |
| 339 | .release = wlan_hdd_release_mib_stats_debugfs, |
| 340 | .owner = THIS_MODULE, |
| 341 | .llseek = default_llseek, |
| 342 | }; |
| 343 | |
| 344 | int wlan_hdd_create_mib_stats_file(struct hdd_adapter *adapter) |
| 345 | { |
| 346 | if (!debugfs_create_file("mib_stats", 0444, adapter->debugfs_phy, |
| 347 | adapter->dev, &fops_mib_stats)) |
| 348 | return -EINVAL; |
| 349 | |
| 350 | if (QDF_IS_STATUS_ERROR(qdf_mutex_create( |
| 351 | &mibstats_lock))) { |
| 352 | hdd_err("mibstats lock init failed!"); |
| 353 | return QDF_STATUS_E_FAILURE; |
| 354 | } |
| 355 | |
| 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | void wlan_hdd_destroy_mib_stats_lock(void) |
| 360 | { |
| 361 | qdf_mutex_destroy(&mibstats_lock); |
| 362 | } |