1 /* 2 * Copyright (c) 2014-2019 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 21 \file epping_txrx.c 22 23 \brief WLAN End Point Ping test tool implementation 24 25 ========================================================================*/ 26 27 /*-------------------------------------------------------------------------- 28 Include Files 29 ------------------------------------------------------------------------*/ 30 #include <cds_api.h> 31 #include <cds_sched.h> 32 #include <linux/etherdevice.h> 33 #include <linux/firmware.h> 34 #include <wni_api.h> 35 #include <wlan_ptt_sock_svc.h> 36 #include <linux/wireless.h> 37 #include <net/cfg80211.h> 38 #include <pld_common.h> 39 #include <linux/rtnetlink.h> 40 #include <linux/semaphore.h> 41 #include <linux/ctype.h> 42 #include "epping_main.h" 43 #include "epping_internal.h" 44 45 static int epping_start_adapter(epping_adapter_t *adapter); 46 static void epping_stop_adapter(epping_adapter_t *adapter); 47 48 static void epping_timer_expire(void *data) 49 { 50 struct net_device *dev = (struct net_device *)data; 51 epping_adapter_t *adapter; 52 53 if (!dev) { 54 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 55 "%s: netdev = NULL", __func__); 56 return; 57 } 58 59 adapter = netdev_priv(dev); 60 if (!adapter) { 61 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 62 "%s: adapter = NULL", __func__); 63 return; 64 } 65 adapter->epping_timer_state = EPPING_TX_TIMER_STOPPED; 66 epping_tx_timer_expire(adapter); 67 } 68 69 static int epping_ndev_open(struct net_device *dev) 70 { 71 epping_adapter_t *adapter; 72 int ret = 0; 73 74 adapter = netdev_priv(dev); 75 epping_start_adapter(adapter); 76 return ret; 77 } 78 79 static int epping_ndev_stop(struct net_device *dev) 80 { 81 epping_adapter_t *adapter; 82 int ret = 0; 83 84 adapter = netdev_priv(dev); 85 if (!adapter) { 86 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 87 "%s: EPPING adapter context is Null", __func__); 88 ret = -ENODEV; 89 goto end; 90 } 91 epping_stop_adapter(adapter); 92 end: 93 return ret; 94 } 95 96 static void epping_ndev_uninit(struct net_device *dev) 97 { 98 epping_adapter_t *adapter; 99 100 adapter = netdev_priv(dev); 101 if (!adapter) { 102 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 103 "%s: EPPING adapter context is Null", __func__); 104 goto end; 105 } 106 epping_stop_adapter(adapter); 107 end: 108 return; 109 } 110 111 static void epping_tx_queue_timeout(struct net_device *dev) 112 { 113 epping_adapter_t *adapter; 114 115 adapter = netdev_priv(dev); 116 if (!adapter) { 117 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 118 "%s: EPPING adapter context is Null", __func__); 119 goto end; 120 } 121 122 EPPING_LOG(QDF_TRACE_LEVEL_ERROR, 123 "%s: Transmission timeout occurred, adapter->started= %d", 124 __func__, adapter->started); 125 126 /* Getting here implies we disabled the TX queues 127 * for too long. Since this is epping 128 * (not because of disassociation or low resource scenarios), 129 * try to restart the queue 130 */ 131 if (adapter->started) 132 netif_wake_queue(dev); 133 end: 134 return; 135 136 } 137 138 static netdev_tx_t epping_hard_start_xmit(struct sk_buff *skb, 139 struct net_device *dev) 140 { 141 epping_adapter_t *adapter; 142 int ret = 0; 143 144 adapter = netdev_priv(dev); 145 if (!adapter) { 146 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 147 "%s: EPPING adapter context is Null", __func__); 148 kfree_skb(skb); 149 ret = -ENODEV; 150 goto end; 151 } 152 qdf_net_buf_debug_acquire_skb(skb, __FILE__, __LINE__); 153 ret = epping_tx_send(skb, adapter); 154 end: 155 return NETDEV_TX_OK; 156 } 157 158 static struct net_device_stats *epping_get_stats(struct net_device *dev) 159 { 160 epping_adapter_t *adapter = netdev_priv(dev); 161 162 if (!adapter) { 163 EPPING_LOG(QDF_TRACE_LEVEL_ERROR, "%s: adapter = NULL", 164 __func__); 165 return NULL; 166 } 167 168 return &adapter->stats; 169 } 170 171 static int epping_ndev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 172 { 173 epping_adapter_t *adapter; 174 int ret = 0; 175 176 adapter = netdev_priv(dev); 177 if (!adapter) { 178 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 179 "%s: EPPING adapter context is Null", __func__); 180 ret = -ENODEV; 181 goto end; 182 } 183 if (dev != adapter->dev) { 184 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 185 "%s: HDD adapter/dev inconsistency", __func__); 186 ret = -ENODEV; 187 goto end; 188 } 189 190 if ((!ifr) || (!ifr->ifr_data)) { 191 ret = -EINVAL; 192 goto end; 193 } 194 195 switch (cmd) { 196 case (SIOCDEVPRIVATE + 1): 197 EPPING_LOG(QDF_TRACE_LEVEL_ERROR, 198 "%s: do not support ioctl %d (SIOCDEVPRIVATE + 1)", 199 __func__, cmd); 200 break; 201 default: 202 EPPING_LOG(QDF_TRACE_LEVEL_ERROR, "%s: unknown ioctl %d", 203 __func__, cmd); 204 ret = -EINVAL; 205 break; 206 } 207 208 end: 209 return ret; 210 } 211 212 static int epping_set_mac_address(struct net_device *dev, void *addr) 213 { 214 epping_adapter_t *adapter = netdev_priv(dev); 215 struct sockaddr *psta_mac_addr = addr; 216 qdf_mem_copy(&adapter->macAddressCurrent, 217 psta_mac_addr->sa_data, ETH_ALEN); 218 qdf_mem_copy(dev->dev_addr, psta_mac_addr->sa_data, ETH_ALEN); 219 return 0; 220 } 221 222 static void epping_stop_adapter(epping_adapter_t *adapter) 223 { 224 qdf_device_t qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE); 225 226 if (!qdf_ctx) { 227 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 228 "%s: qdf_ctx is NULL\n", __func__); 229 return; 230 } 231 232 if (adapter && adapter->started) { 233 EPPING_LOG(LOG1, FL("Disabling queues")); 234 netif_tx_disable(adapter->dev); 235 netif_carrier_off(adapter->dev); 236 adapter->started = false; 237 pld_request_bus_bandwidth(qdf_ctx->dev, 238 PLD_BUS_WIDTH_LOW); 239 } 240 } 241 242 static int epping_start_adapter(epping_adapter_t *adapter) 243 { 244 qdf_device_t qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE); 245 246 if (!qdf_ctx) { 247 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 248 "%s: qdf_ctx is NULL", __func__); 249 return -EINVAL; 250 } 251 252 if (!adapter) { 253 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 254 "%s: adapter= NULL\n", __func__); 255 return -EINVAL; 256 } 257 if (!adapter->started) { 258 pld_request_bus_bandwidth(qdf_ctx->dev, 259 PLD_BUS_WIDTH_HIGH); 260 netif_carrier_on(adapter->dev); 261 EPPING_LOG(LOG1, FL("Enabling queues")); 262 netif_tx_start_all_queues(adapter->dev); 263 adapter->started = true; 264 } else { 265 EPPING_LOG(QDF_TRACE_LEVEL_WARN, 266 "%s: adapter %pK already started\n", __func__, 267 adapter); 268 } 269 return 0; 270 } 271 272 static int epping_register_adapter(epping_adapter_t *adapter, bool rtnl_held) 273 { 274 int ret = 0; 275 276 if (!rtnl_held) 277 ret = register_netdev(adapter->dev); 278 else 279 ret = register_netdevice(adapter->dev); 280 if (ret != 0) { 281 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 282 "%s: unable to register device\n", 283 adapter->dev->name); 284 } else { 285 adapter->registered = true; 286 } 287 return ret; 288 } 289 290 static void epping_unregister_adapter(epping_adapter_t *adapter) 291 { 292 if (adapter) { 293 epping_stop_adapter(adapter); 294 if (adapter->registered) { 295 unregister_netdev(adapter->dev); 296 adapter->registered = false; 297 } 298 } else { 299 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 300 "%s: adapter = NULL, unable to unregister device\n", 301 __func__); 302 } 303 } 304 305 void epping_destroy_adapter(epping_adapter_t *adapter) 306 { 307 struct net_device *dev = NULL; 308 epping_context_t *pEpping_ctx; 309 310 if (!adapter || !adapter->pEpping_ctx) { 311 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 312 "%s: adapter = NULL\n", __func__); 313 return; 314 } 315 316 dev = adapter->dev; 317 pEpping_ctx = adapter->pEpping_ctx; 318 epping_unregister_adapter(adapter); 319 320 qdf_spinlock_destroy(&adapter->data_lock); 321 qdf_timer_free(&adapter->epping_timer); 322 adapter->epping_timer_state = EPPING_TX_TIMER_STOPPED; 323 324 while (qdf_nbuf_queue_len(&adapter->nodrop_queue)) { 325 qdf_nbuf_t tmp_nbuf = NULL; 326 tmp_nbuf = qdf_nbuf_queue_remove(&adapter->nodrop_queue); 327 if (tmp_nbuf) 328 qdf_nbuf_free(tmp_nbuf); 329 } 330 331 free_netdev(dev); 332 if (!pEpping_ctx) 333 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 334 "%s: pEpping_ctx = NULL\n", __func__); 335 else 336 pEpping_ctx->epping_adapter = NULL; 337 } 338 339 static struct net_device_ops epping_drv_ops = { 340 .ndo_open = epping_ndev_open, 341 .ndo_stop = epping_ndev_stop, 342 .ndo_uninit = epping_ndev_uninit, 343 .ndo_start_xmit = epping_hard_start_xmit, 344 .ndo_tx_timeout = epping_tx_queue_timeout, 345 .ndo_get_stats = epping_get_stats, 346 .ndo_do_ioctl = epping_ndev_ioctl, 347 .ndo_set_mac_address = epping_set_mac_address, 348 .ndo_select_queue = NULL, 349 }; 350 351 #define EPPING_TX_QUEUE_MAX_LEN 128 /* need to be power of 2 */ 352 353 epping_adapter_t *epping_add_adapter(epping_context_t *pEpping_ctx, 354 tSirMacAddr macAddr, 355 enum QDF_OPMODE device_mode, 356 bool rtnl_held) 357 { 358 struct net_device *dev; 359 epping_adapter_t *adapter; 360 361 dev = alloc_netdev(sizeof(epping_adapter_t), "wifi%d", 362 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 17, 0)) 363 NET_NAME_UNKNOWN, 364 #endif 365 ether_setup); 366 if (!dev) { 367 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 368 "%s: Cannot allocate epping_adapter_t\n", __func__); 369 return NULL; 370 } 371 372 adapter = netdev_priv(dev); 373 qdf_mem_zero(adapter, sizeof(*adapter)); 374 adapter->dev = dev; 375 adapter->pEpping_ctx = pEpping_ctx; 376 adapter->device_mode = device_mode; /* station, SAP, etc */ 377 qdf_mem_copy(dev->dev_addr, (void *)macAddr, sizeof(tSirMacAddr)); 378 qdf_mem_copy(adapter->macAddressCurrent.bytes, 379 macAddr, sizeof(tSirMacAddr)); 380 qdf_spinlock_create(&adapter->data_lock); 381 qdf_nbuf_queue_init(&adapter->nodrop_queue); 382 adapter->epping_timer_state = EPPING_TX_TIMER_STOPPED; 383 qdf_timer_init(epping_get_qdf_ctx(), &adapter->epping_timer, 384 epping_timer_expire, dev, QDF_TIMER_TYPE_SW); 385 dev->type = ARPHRD_IEEE80211; 386 dev->needed_headroom += 24; 387 dev->netdev_ops = &epping_drv_ops; 388 dev->watchdog_timeo = 5 * HZ; /* XXX */ 389 dev->tx_queue_len = EPPING_TXBUF - 1; /* 1 for mgmt frame */ 390 if (epping_register_adapter(adapter, rtnl_held) == 0) { 391 EPPING_LOG(LOG1, FL("Disabling queues")); 392 netif_tx_disable(dev); 393 netif_carrier_off(dev); 394 return adapter; 395 } else { 396 epping_destroy_adapter(adapter); 397 return NULL; 398 } 399 } 400 401 int epping_connect_service(epping_context_t *pEpping_ctx) 402 { 403 int status, i; 404 struct htc_service_connect_req connect; 405 struct htc_service_connect_resp response; 406 407 qdf_mem_zero(&connect, sizeof(connect)); 408 qdf_mem_zero(&response, sizeof(response)); 409 410 /* these fields are the same for all service endpoints */ 411 connect.EpCallbacks.pContext = pEpping_ctx; 412 connect.EpCallbacks.EpTxCompleteMultiple = NULL; 413 connect.EpCallbacks.EpRecv = epping_rx; 414 /* epping_tx_complete use Multiple version */ 415 connect.EpCallbacks.EpTxComplete = epping_tx_complete; 416 connect.MaxSendQueueDepth = 64; 417 418 #ifdef HIF_SDIO 419 connect.EpCallbacks.EpRecvRefill = epping_refill; 420 connect.EpCallbacks.EpSendFull = 421 epping_tx_queue_full /* ar6000_tx_queue_full */; 422 #elif defined(HIF_USB) || defined(HIF_PCI) || defined(HIF_SNOC) 423 connect.EpCallbacks.EpRecvRefill = NULL /* provided by HIF */; 424 connect.EpCallbacks.EpSendFull = NULL /* provided by HIF */; 425 /* disable flow control for hw flow control */ 426 connect.ConnectionFlags |= HTC_CONNECT_FLAGS_DISABLE_CREDIT_FLOW_CTRL; 427 #endif 428 429 /* connect to service */ 430 connect.service_id = WMI_DATA_BE_SVC; 431 status = htc_connect_service(pEpping_ctx->HTCHandle, &connect, &response); 432 if (QDF_IS_STATUS_ERROR(status)) { 433 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 434 "Failed to connect to Endpoint Ping BE service status:%d\n", 435 status); 436 return status; 437 } else { 438 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 439 "eppingtest BE endpoint:%d\n", response.Endpoint); 440 } 441 pEpping_ctx->EppingEndpoint[0] = response.Endpoint; 442 443 #if defined(HIF_PCI) || defined(HIF_USB) || defined(HIF_SNOC) 444 connect.service_id = WMI_DATA_BK_SVC; 445 status = htc_connect_service(pEpping_ctx->HTCHandle, &connect, &response); 446 if (QDF_IS_STATUS_ERROR(status)) { 447 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 448 "Failed to connect to Endpoint Ping BK service status:%d\n", 449 status); 450 return status; 451 } else { 452 EPPING_LOG(QDF_TRACE_LEVEL_FATAL, 453 "eppingtest BK endpoint:%d\n", response.Endpoint); 454 } 455 pEpping_ctx->EppingEndpoint[1] = response.Endpoint; 456 /* Since we do not create other two SVC use BK endpoint 457 * for rest ACs (2, 3) */ 458 for (i = 2; i < EPPING_MAX_NUM_EPIDS; i++) { 459 pEpping_ctx->EppingEndpoint[i] = response.Endpoint; 460 } 461 #else 462 /* we only use one endpoint for high latenance bus. 463 * Map all AC's EPIDs to the same endpoint ID returned by HTC */ 464 for (i = 0; i < EPPING_MAX_NUM_EPIDS; i++) { 465 pEpping_ctx->EppingEndpoint[i] = response.Endpoint; 466 } 467 #endif 468 return 0; 469 } 470