1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2009-2012 Realtek Corporation.*/ 3 4 #include "wifi.h" 5 #include "core.h" 6 #include "usb.h" 7 #include "base.h" 8 #include "ps.h" 9 #include "rtl8192c/fw_common.h" 10 #include <linux/export.h> 11 #include <linux/module.h> 12 13 MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>"); 14 MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>"); 15 MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>"); 16 MODULE_LICENSE("GPL"); 17 MODULE_DESCRIPTION("USB basic driver for rtlwifi"); 18 19 #define REALTEK_USB_VENQT_READ 0xC0 20 #define REALTEK_USB_VENQT_WRITE 0x40 21 #define REALTEK_USB_VENQT_CMD_REQ 0x05 22 #define REALTEK_USB_VENQT_CMD_IDX 0x00 23 24 #define MAX_USBCTRL_VENDORREQ_TIMES 10 25 26 static void usbctrl_async_callback(struct urb *urb) 27 { 28 if (urb) { 29 /* free dr */ 30 kfree(urb->setup_packet); 31 /* free databuf */ 32 kfree(urb->transfer_buffer); 33 } 34 } 35 36 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request, 37 u16 value, u16 index, void *pdata, 38 u16 len) 39 { 40 int rc; 41 unsigned int pipe; 42 u8 reqtype; 43 struct usb_ctrlrequest *dr; 44 struct urb *urb; 45 const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE; 46 u8 *databuf; 47 48 if (WARN_ON_ONCE(len > databuf_maxlen)) 49 len = databuf_maxlen; 50 51 pipe = usb_sndctrlpipe(udev, 0); /* write_out */ 52 reqtype = REALTEK_USB_VENQT_WRITE; 53 54 dr = kzalloc(sizeof(*dr), GFP_ATOMIC); 55 if (!dr) 56 return -ENOMEM; 57 58 databuf = kzalloc(databuf_maxlen, GFP_ATOMIC); 59 if (!databuf) { 60 kfree(dr); 61 return -ENOMEM; 62 } 63 64 urb = usb_alloc_urb(0, GFP_ATOMIC); 65 if (!urb) { 66 kfree(databuf); 67 kfree(dr); 68 return -ENOMEM; 69 } 70 71 dr->bRequestType = reqtype; 72 dr->bRequest = request; 73 dr->wValue = cpu_to_le16(value); 74 dr->wIndex = cpu_to_le16(index); 75 dr->wLength = cpu_to_le16(len); 76 /* data are already in little-endian order */ 77 memcpy(databuf, pdata, len); 78 usb_fill_control_urb(urb, udev, pipe, 79 (unsigned char *)dr, databuf, len, 80 usbctrl_async_callback, NULL); 81 rc = usb_submit_urb(urb, GFP_ATOMIC); 82 if (rc < 0) { 83 kfree(databuf); 84 kfree(dr); 85 } 86 usb_free_urb(urb); 87 return rc; 88 } 89 90 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request, 91 u16 value, u16 index, void *pdata, 92 u16 len) 93 { 94 unsigned int pipe; 95 int status; 96 u8 reqtype; 97 int vendorreq_times = 0; 98 static int count; 99 100 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */ 101 reqtype = REALTEK_USB_VENQT_READ; 102 103 do { 104 status = usb_control_msg(udev, pipe, request, reqtype, value, 105 index, pdata, len, 1000); 106 if (status < 0) { 107 /* firmware download is checksumed, don't retry */ 108 if ((value >= FW_8192C_START_ADDRESS && 109 value <= FW_8192C_END_ADDRESS)) 110 break; 111 } else { 112 break; 113 } 114 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES); 115 116 if (status < 0 && count++ < 4) 117 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n", 118 value, status, *(u32 *)pdata); 119 return status; 120 } 121 122 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len) 123 { 124 struct device *dev = rtlpriv->io.dev; 125 struct usb_device *udev = to_usb_device(dev); 126 u8 request; 127 u16 wvalue; 128 u16 index; 129 __le32 *data; 130 unsigned long flags; 131 132 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags); 133 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT) 134 rtlpriv->usb_data_index = 0; 135 data = &rtlpriv->usb_data[rtlpriv->usb_data_index]; 136 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags); 137 request = REALTEK_USB_VENQT_CMD_REQ; 138 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */ 139 140 wvalue = (u16)addr; 141 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len); 142 return le32_to_cpu(*data); 143 } 144 145 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr) 146 { 147 return (u8)_usb_read_sync(rtlpriv, addr, 1); 148 } 149 150 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr) 151 { 152 return (u16)_usb_read_sync(rtlpriv, addr, 2); 153 } 154 155 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr) 156 { 157 return _usb_read_sync(rtlpriv, addr, 4); 158 } 159 160 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val, 161 u16 len) 162 { 163 u8 request; 164 u16 wvalue; 165 u16 index; 166 __le32 data; 167 168 request = REALTEK_USB_VENQT_CMD_REQ; 169 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */ 170 wvalue = (u16)(addr&0x0000ffff); 171 data = cpu_to_le32(val); 172 _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data, 173 len); 174 } 175 176 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val) 177 { 178 struct device *dev = rtlpriv->io.dev; 179 180 _usb_write_async(to_usb_device(dev), addr, val, 1); 181 } 182 183 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val) 184 { 185 struct device *dev = rtlpriv->io.dev; 186 187 _usb_write_async(to_usb_device(dev), addr, val, 2); 188 } 189 190 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val) 191 { 192 struct device *dev = rtlpriv->io.dev; 193 194 _usb_write_async(to_usb_device(dev), addr, val, 4); 195 } 196 197 static void _usb_writen_sync(struct rtl_priv *rtlpriv, u32 addr, void *data, 198 u16 len) 199 { 200 struct device *dev = rtlpriv->io.dev; 201 struct usb_device *udev = to_usb_device(dev); 202 u8 request = REALTEK_USB_VENQT_CMD_REQ; 203 u8 reqtype = REALTEK_USB_VENQT_WRITE; 204 u16 wvalue; 205 u16 index = REALTEK_USB_VENQT_CMD_IDX; 206 int pipe = usb_sndctrlpipe(udev, 0); /* write_out */ 207 u8 *buffer; 208 209 wvalue = (u16)(addr & 0x0000ffff); 210 buffer = kmemdup(data, len, GFP_ATOMIC); 211 if (!buffer) 212 return; 213 usb_control_msg(udev, pipe, request, reqtype, wvalue, 214 index, buffer, len, 50); 215 216 kfree(buffer); 217 } 218 219 static void _rtl_usb_io_handler_init(struct device *dev, 220 struct ieee80211_hw *hw) 221 { 222 struct rtl_priv *rtlpriv = rtl_priv(hw); 223 224 rtlpriv->io.dev = dev; 225 mutex_init(&rtlpriv->io.bb_mutex); 226 rtlpriv->io.write8_async = _usb_write8_async; 227 rtlpriv->io.write16_async = _usb_write16_async; 228 rtlpriv->io.write32_async = _usb_write32_async; 229 rtlpriv->io.read8_sync = _usb_read8_sync; 230 rtlpriv->io.read16_sync = _usb_read16_sync; 231 rtlpriv->io.read32_sync = _usb_read32_sync; 232 rtlpriv->io.writen_sync = _usb_writen_sync; 233 } 234 235 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw) 236 { 237 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw); 238 239 mutex_destroy(&rtlpriv->io.bb_mutex); 240 } 241 242 /* Default aggregation handler. Do nothing and just return the oldest skb. */ 243 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw, 244 struct sk_buff_head *list) 245 { 246 return skb_dequeue(list); 247 } 248 249 #define IS_HIGH_SPEED_USB(udev) \ 250 ((USB_SPEED_HIGH == (udev)->speed) ? true : false) 251 252 static int _rtl_usb_init_tx(struct ieee80211_hw *hw) 253 { 254 u32 i; 255 struct rtl_priv *rtlpriv = rtl_priv(hw); 256 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 257 258 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev) 259 ? USB_HIGH_SPEED_BULK_SIZE 260 : USB_FULL_SPEED_BULK_SIZE; 261 262 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n", 263 rtlusb->max_bulk_out_size); 264 265 for (i = 0; i < __RTL_TXQ_NUM; i++) { 266 u32 ep_num = rtlusb->ep_map.ep_mapping[i]; 267 268 if (!ep_num) { 269 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, 270 "Invalid endpoint map setting!\n"); 271 return -EINVAL; 272 } 273 } 274 275 rtlusb->usb_tx_post_hdl = 276 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl; 277 rtlusb->usb_tx_cleanup = 278 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup; 279 rtlusb->usb_tx_aggregate_hdl = 280 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl) 281 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl 282 : &_none_usb_tx_aggregate_hdl; 283 284 init_usb_anchor(&rtlusb->tx_submitted); 285 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 286 skb_queue_head_init(&rtlusb->tx_skb_queue[i]); 287 init_usb_anchor(&rtlusb->tx_pending[i]); 288 } 289 return 0; 290 } 291 292 static void _rtl_rx_work(struct tasklet_struct *t); 293 294 static int _rtl_usb_init_rx(struct ieee80211_hw *hw) 295 { 296 struct rtl_priv *rtlpriv = rtl_priv(hw); 297 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 298 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 299 300 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size; 301 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num; 302 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num; 303 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl; 304 rtlusb->usb_rx_segregate_hdl = 305 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl; 306 307 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n", 308 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep); 309 init_usb_anchor(&rtlusb->rx_submitted); 310 init_usb_anchor(&rtlusb->rx_cleanup_urbs); 311 312 skb_queue_head_init(&rtlusb->rx_queue); 313 tasklet_setup(&rtlusb->rx_work_tasklet, _rtl_rx_work); 314 315 return 0; 316 } 317 318 static int _rtl_usb_init(struct ieee80211_hw *hw) 319 { 320 struct rtl_priv *rtlpriv = rtl_priv(hw); 321 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 322 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 323 int err; 324 u8 epidx; 325 struct usb_interface *usb_intf = rtlusb->intf; 326 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints; 327 328 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0; 329 for (epidx = 0; epidx < epnums; epidx++) { 330 struct usb_endpoint_descriptor *pep_desc; 331 332 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc; 333 334 if (usb_endpoint_dir_in(pep_desc)) 335 rtlusb->in_ep_nums++; 336 else if (usb_endpoint_dir_out(pep_desc)) 337 rtlusb->out_ep_nums++; 338 339 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, 340 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n", 341 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize, 342 pep_desc->bInterval); 343 } 344 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) { 345 pr_err("Too few input end points found\n"); 346 return -EINVAL; 347 } 348 if (rtlusb->out_ep_nums == 0) { 349 pr_err("No output end points found\n"); 350 return -EINVAL; 351 } 352 /* usb endpoint mapping */ 353 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw); 354 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq; 355 _rtl_usb_init_tx(hw); 356 _rtl_usb_init_rx(hw); 357 return err; 358 } 359 360 static void rtl_usb_init_sw(struct ieee80211_hw *hw) 361 { 362 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 363 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 364 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 365 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 366 367 rtlhal->hw = hw; 368 ppsc->inactiveps = false; 369 ppsc->leisure_ps = false; 370 ppsc->fwctrl_lps = false; 371 ppsc->reg_fwctrl_lps = 3; 372 ppsc->reg_max_lps_awakeintvl = 5; 373 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE; 374 375 /* IBSS */ 376 mac->beacon_interval = 100; 377 378 /* AMPDU */ 379 mac->min_space_cfg = 0; 380 mac->max_mss_density = 0; 381 382 /* set sane AMPDU defaults */ 383 mac->current_ampdu_density = 7; 384 mac->current_ampdu_factor = 3; 385 386 /* QOS */ 387 rtlusb->acm_method = EACMWAY2_SW; 388 389 /* IRQ */ 390 /* HIMR - turn all on */ 391 rtlusb->irq_mask[0] = 0xFFFFFFFF; 392 /* HIMR_EX - turn all on */ 393 rtlusb->irq_mask[1] = 0xFFFFFFFF; 394 rtlusb->disablehwsm = true; 395 } 396 397 static void _rtl_rx_completed(struct urb *urb); 398 399 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb, 400 struct urb *urb, gfp_t gfp_mask) 401 { 402 void *buf; 403 404 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask, 405 &urb->transfer_dma); 406 if (!buf) { 407 pr_err("Failed to usb_alloc_coherent!!\n"); 408 return -ENOMEM; 409 } 410 411 usb_fill_bulk_urb(urb, rtlusb->udev, 412 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep), 413 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb); 414 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 415 416 return 0; 417 } 418 419 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw, 420 struct sk_buff *skb) 421 { 422 struct rtl_priv *rtlpriv = rtl_priv(hw); 423 u8 *rxdesc = skb->data; 424 struct ieee80211_hdr *hdr; 425 bool unicast = false; 426 __le16 fc; 427 struct ieee80211_rx_status rx_status = {0}; 428 struct rtl_stats stats = { 429 .signal = 0, 430 .rate = 0, 431 }; 432 433 skb_pull(skb, RTL_RX_DESC_SIZE); 434 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 435 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 436 hdr = (struct ieee80211_hdr *)(skb->data); 437 fc = hdr->frame_control; 438 if (!stats.crc) { 439 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 440 441 if (is_broadcast_ether_addr(hdr->addr1)) { 442 /*TODO*/; 443 } else if (is_multicast_ether_addr(hdr->addr1)) { 444 /*TODO*/ 445 } else { 446 unicast = true; 447 rtlpriv->stats.rxbytesunicast += skb->len; 448 } 449 450 if (ieee80211_is_data(fc)) { 451 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 452 453 if (unicast) 454 rtlpriv->link_info.num_rx_inperiod++; 455 } 456 /* static bcn for roaming */ 457 rtl_beacon_statistic(hw, skb); 458 } 459 } 460 461 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw, 462 struct sk_buff *skb) 463 { 464 struct rtl_priv *rtlpriv = rtl_priv(hw); 465 u8 *rxdesc = skb->data; 466 struct ieee80211_hdr *hdr; 467 bool unicast = false; 468 __le16 fc; 469 struct ieee80211_rx_status rx_status = {0}; 470 struct rtl_stats stats = { 471 .signal = 0, 472 .rate = 0, 473 }; 474 475 skb_pull(skb, RTL_RX_DESC_SIZE); 476 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 477 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 478 hdr = (struct ieee80211_hdr *)(skb->data); 479 fc = hdr->frame_control; 480 if (!stats.crc) { 481 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 482 483 if (is_broadcast_ether_addr(hdr->addr1)) { 484 /*TODO*/; 485 } else if (is_multicast_ether_addr(hdr->addr1)) { 486 /*TODO*/ 487 } else { 488 unicast = true; 489 rtlpriv->stats.rxbytesunicast += skb->len; 490 } 491 492 if (ieee80211_is_data(fc)) { 493 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 494 495 if (unicast) 496 rtlpriv->link_info.num_rx_inperiod++; 497 } 498 499 /* static bcn for roaming */ 500 rtl_beacon_statistic(hw, skb); 501 502 if (likely(rtl_action_proc(hw, skb, false))) 503 ieee80211_rx(hw, skb); 504 else 505 dev_kfree_skb_any(skb); 506 } else { 507 dev_kfree_skb_any(skb); 508 } 509 } 510 511 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb) 512 { 513 struct sk_buff *_skb; 514 struct sk_buff_head rx_queue; 515 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 516 517 skb_queue_head_init(&rx_queue); 518 if (rtlusb->usb_rx_segregate_hdl) 519 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue); 520 WARN_ON(skb_queue_empty(&rx_queue)); 521 while (!skb_queue_empty(&rx_queue)) { 522 _skb = skb_dequeue(&rx_queue); 523 _rtl_usb_rx_process_agg(hw, _skb); 524 ieee80211_rx(hw, _skb); 525 } 526 } 527 528 #define __RX_SKB_MAX_QUEUED 64 529 530 static void _rtl_rx_work(struct tasklet_struct *t) 531 { 532 struct rtl_usb *rtlusb = from_tasklet(rtlusb, t, rx_work_tasklet); 533 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 534 struct sk_buff *skb; 535 536 while ((skb = skb_dequeue(&rtlusb->rx_queue))) { 537 if (unlikely(IS_USB_STOP(rtlusb))) { 538 dev_kfree_skb_any(skb); 539 continue; 540 } 541 542 if (likely(!rtlusb->usb_rx_segregate_hdl)) { 543 _rtl_usb_rx_process_noagg(hw, skb); 544 } else { 545 /* TO DO */ 546 _rtl_rx_pre_process(hw, skb); 547 pr_err("rx agg not supported\n"); 548 } 549 } 550 } 551 552 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr, 553 unsigned int len) 554 { 555 #if NET_IP_ALIGN != 0 556 unsigned int padding = 0; 557 #endif 558 559 /* make function no-op when possible */ 560 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr)) 561 return 0; 562 563 #if NET_IP_ALIGN != 0 564 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */ 565 /* TODO: deduplicate common code, define helper function instead? */ 566 567 if (ieee80211_is_data_qos(hdr->frame_control)) { 568 u8 *qc = ieee80211_get_qos_ctl(hdr); 569 570 padding ^= NET_IP_ALIGN; 571 572 /* Input might be invalid, avoid accessing memory outside 573 * the buffer. 574 */ 575 if ((unsigned long)qc - (unsigned long)hdr < len && 576 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 577 padding ^= NET_IP_ALIGN; 578 } 579 580 if (ieee80211_has_a4(hdr->frame_control)) 581 padding ^= NET_IP_ALIGN; 582 583 return padding; 584 #endif 585 } 586 587 #define __RADIO_TAP_SIZE_RSV 32 588 589 static void _rtl_rx_completed(struct urb *_urb) 590 { 591 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context; 592 int err = 0; 593 594 if (unlikely(IS_USB_STOP(rtlusb))) 595 goto free; 596 597 if (likely(0 == _urb->status)) { 598 unsigned int padding; 599 struct sk_buff *skb; 600 unsigned int qlen; 601 unsigned int size = _urb->actual_length; 602 struct ieee80211_hdr *hdr; 603 604 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) { 605 pr_err("Too short packet from bulk IN! (len: %d)\n", 606 size); 607 goto resubmit; 608 } 609 610 qlen = skb_queue_len(&rtlusb->rx_queue); 611 if (qlen >= __RX_SKB_MAX_QUEUED) { 612 pr_err("Pending RX skbuff queue full! (qlen: %d)\n", 613 qlen); 614 goto resubmit; 615 } 616 617 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE); 618 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE); 619 620 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding); 621 if (!skb) { 622 pr_err("Can't allocate skb for bulk IN!\n"); 623 goto resubmit; 624 } 625 626 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep); 627 628 /* Make sure the payload data is 4 byte aligned. */ 629 skb_reserve(skb, padding); 630 631 /* reserve some space for mac80211's radiotap */ 632 skb_reserve(skb, __RADIO_TAP_SIZE_RSV); 633 634 skb_put_data(skb, _urb->transfer_buffer, size); 635 636 skb_queue_tail(&rtlusb->rx_queue, skb); 637 tasklet_schedule(&rtlusb->rx_work_tasklet); 638 639 goto resubmit; 640 } 641 642 switch (_urb->status) { 643 /* disconnect */ 644 case -ENOENT: 645 case -ECONNRESET: 646 case -ENODEV: 647 case -ESHUTDOWN: 648 goto free; 649 default: 650 break; 651 } 652 653 resubmit: 654 usb_anchor_urb(_urb, &rtlusb->rx_submitted); 655 err = usb_submit_urb(_urb, GFP_ATOMIC); 656 if (unlikely(err)) { 657 usb_unanchor_urb(_urb); 658 goto free; 659 } 660 return; 661 662 free: 663 /* On some architectures, usb_free_coherent must not be called from 664 * hardirq context. Queue urb to cleanup list. 665 */ 666 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs); 667 } 668 669 #undef __RADIO_TAP_SIZE_RSV 670 671 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw) 672 { 673 struct rtl_priv *rtlpriv = rtl_priv(hw); 674 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 675 struct urb *urb; 676 677 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 678 679 tasklet_kill(&rtlusb->rx_work_tasklet); 680 cancel_work_sync(&rtlpriv->works.lps_change_work); 681 682 if (rtlpriv->works.rtl_wq) { 683 destroy_workqueue(rtlpriv->works.rtl_wq); 684 rtlpriv->works.rtl_wq = NULL; 685 } 686 687 skb_queue_purge(&rtlusb->rx_queue); 688 689 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 690 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 691 urb->transfer_buffer, urb->transfer_dma); 692 usb_free_urb(urb); 693 } 694 } 695 696 static int _rtl_usb_receive(struct ieee80211_hw *hw) 697 { 698 struct urb *urb; 699 int err; 700 int i; 701 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 702 703 WARN_ON(0 == rtlusb->rx_urb_num); 704 /* 1600 == 1514 + max WLAN header + rtk info */ 705 WARN_ON(rtlusb->rx_max_size < 1600); 706 707 for (i = 0; i < rtlusb->rx_urb_num; i++) { 708 err = -ENOMEM; 709 urb = usb_alloc_urb(0, GFP_KERNEL); 710 if (!urb) 711 goto err_out; 712 713 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL); 714 if (err < 0) { 715 pr_err("Failed to prep_rx_urb!!\n"); 716 usb_free_urb(urb); 717 goto err_out; 718 } 719 720 usb_anchor_urb(urb, &rtlusb->rx_submitted); 721 err = usb_submit_urb(urb, GFP_KERNEL); 722 if (err) { 723 usb_unanchor_urb(urb); 724 usb_free_urb(urb); 725 goto err_out; 726 } 727 usb_free_urb(urb); 728 } 729 return 0; 730 731 err_out: 732 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 733 return err; 734 } 735 736 static int rtl_usb_start(struct ieee80211_hw *hw) 737 { 738 int err; 739 struct rtl_priv *rtlpriv = rtl_priv(hw); 740 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 741 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 742 743 err = rtlpriv->cfg->ops->hw_init(hw); 744 if (!err) { 745 rtl_init_rx_config(hw); 746 747 /* Enable software */ 748 SET_USB_START(rtlusb); 749 /* should after adapter start and interrupt enable. */ 750 set_hal_start(rtlhal); 751 752 /* Start bulk IN */ 753 err = _rtl_usb_receive(hw); 754 } 755 756 return err; 757 } 758 759 /*======================= tx =========================================*/ 760 static void rtl_usb_cleanup(struct ieee80211_hw *hw) 761 { 762 u32 i; 763 struct sk_buff *_skb; 764 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 765 struct ieee80211_tx_info *txinfo; 766 767 /* clean up rx stuff. */ 768 _rtl_usb_cleanup_rx(hw); 769 770 /* clean up tx stuff */ 771 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 772 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) { 773 rtlusb->usb_tx_cleanup(hw, _skb); 774 txinfo = IEEE80211_SKB_CB(_skb); 775 ieee80211_tx_info_clear_status(txinfo); 776 txinfo->flags |= IEEE80211_TX_STAT_ACK; 777 ieee80211_tx_status_irqsafe(hw, _skb); 778 } 779 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]); 780 } 781 usb_kill_anchored_urbs(&rtlusb->tx_submitted); 782 } 783 784 /* We may add some struct into struct rtl_usb later. Do deinit here. */ 785 static void rtl_usb_deinit(struct ieee80211_hw *hw) 786 { 787 rtl_usb_cleanup(hw); 788 } 789 790 static void rtl_usb_stop(struct ieee80211_hw *hw) 791 { 792 struct rtl_priv *rtlpriv = rtl_priv(hw); 793 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 794 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 795 struct urb *urb; 796 797 /* should after adapter start and interrupt enable. */ 798 set_hal_stop(rtlhal); 799 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd); 800 /* Enable software */ 801 SET_USB_STOP(rtlusb); 802 803 /* free pre-allocated URBs from rtl_usb_start() */ 804 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 805 806 tasklet_kill(&rtlusb->rx_work_tasklet); 807 cancel_work_sync(&rtlpriv->works.lps_change_work); 808 cancel_work_sync(&rtlpriv->works.update_beacon_work); 809 810 flush_workqueue(rtlpriv->works.rtl_wq); 811 812 skb_queue_purge(&rtlusb->rx_queue); 813 814 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 815 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 816 urb->transfer_buffer, urb->transfer_dma); 817 usb_free_urb(urb); 818 } 819 820 rtlpriv->cfg->ops->hw_disable(hw); 821 } 822 823 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb) 824 { 825 int err; 826 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 827 828 usb_anchor_urb(_urb, &rtlusb->tx_submitted); 829 err = usb_submit_urb(_urb, GFP_ATOMIC); 830 if (err < 0) { 831 struct sk_buff *skb; 832 833 pr_err("Failed to submit urb\n"); 834 usb_unanchor_urb(_urb); 835 skb = (struct sk_buff *)_urb->context; 836 kfree_skb(skb); 837 } 838 usb_free_urb(_urb); 839 } 840 841 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb, 842 struct sk_buff *skb) 843 { 844 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 845 struct ieee80211_tx_info *txinfo; 846 847 rtlusb->usb_tx_post_hdl(hw, urb, skb); 848 skb_pull(skb, RTL_TX_HEADER_SIZE); 849 txinfo = IEEE80211_SKB_CB(skb); 850 ieee80211_tx_info_clear_status(txinfo); 851 txinfo->flags |= IEEE80211_TX_STAT_ACK; 852 853 if (urb->status) { 854 pr_err("Urb has error status 0x%X\n", urb->status); 855 goto out; 856 } 857 /* TODO: statistics */ 858 out: 859 ieee80211_tx_status_irqsafe(hw, skb); 860 return urb->status; 861 } 862 863 static void _rtl_tx_complete(struct urb *urb) 864 { 865 struct sk_buff *skb = (struct sk_buff *)urb->context; 866 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 867 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0]; 868 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 869 int err; 870 871 if (unlikely(IS_USB_STOP(rtlusb))) 872 return; 873 err = _usb_tx_post(hw, urb, skb); 874 if (err) { 875 /* Ignore error and keep issuiing other urbs */ 876 return; 877 } 878 } 879 880 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw, 881 struct sk_buff *skb, u32 ep_num) 882 { 883 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 884 struct urb *_urb; 885 886 WARN_ON(NULL == skb); 887 _urb = usb_alloc_urb(0, GFP_ATOMIC); 888 if (!_urb) 889 return NULL; 890 _rtl_install_trx_info(rtlusb, skb, ep_num); 891 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev, 892 ep_num), skb->data, skb->len, _rtl_tx_complete, skb); 893 _urb->transfer_flags |= URB_ZERO_PACKET; 894 return _urb; 895 } 896 897 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb, 898 enum rtl_txq qnum) 899 { 900 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 901 u32 ep_num; 902 struct urb *_urb = NULL; 903 904 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl); 905 if (unlikely(IS_USB_STOP(rtlusb))) { 906 pr_err("USB device is stopping...\n"); 907 kfree_skb(skb); 908 return; 909 } 910 ep_num = rtlusb->ep_map.ep_mapping[qnum]; 911 _urb = _rtl_usb_tx_urb_setup(hw, skb, ep_num); 912 if (unlikely(!_urb)) { 913 pr_err("Can't allocate urb. Drop skb!\n"); 914 kfree_skb(skb); 915 return; 916 } 917 _rtl_submit_tx_urb(hw, _urb); 918 } 919 920 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, 921 struct ieee80211_sta *sta, 922 struct sk_buff *skb, 923 u16 hw_queue) 924 { 925 struct rtl_priv *rtlpriv = rtl_priv(hw); 926 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 927 struct rtl_tx_desc *pdesc = NULL; 928 struct rtl_tcb_desc tcb_desc; 929 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 930 __le16 fc = hdr->frame_control; 931 u8 *pda_addr = hdr->addr1; 932 933 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc)); 934 if (ieee80211_is_auth(fc)) { 935 rtl_dbg(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n"); 936 } 937 938 if (rtlpriv->psc.sw_ps_enabled) { 939 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) && 940 !ieee80211_has_pm(fc)) 941 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 942 } 943 944 rtl_action_proc(hw, skb, true); 945 if (is_multicast_ether_addr(pda_addr)) 946 rtlpriv->stats.txbytesmulticast += skb->len; 947 else if (is_broadcast_ether_addr(pda_addr)) 948 rtlpriv->stats.txbytesbroadcast += skb->len; 949 else 950 rtlpriv->stats.txbytesunicast += skb->len; 951 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb, 952 hw_queue, &tcb_desc); 953 if (ieee80211_is_data(fc)) 954 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX); 955 } 956 957 static int rtl_usb_tx(struct ieee80211_hw *hw, 958 struct ieee80211_sta *sta, 959 struct sk_buff *skb, 960 struct rtl_tcb_desc *dummy) 961 { 962 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 963 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 964 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 965 __le16 fc = hdr->frame_control; 966 u16 hw_queue; 967 968 if (unlikely(is_hal_stop(rtlhal))) 969 goto err_free; 970 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb)); 971 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue); 972 _rtl_usb_transmit(hw, skb, hw_queue); 973 return NETDEV_TX_OK; 974 975 err_free: 976 dev_kfree_skb_any(skb); 977 return NETDEV_TX_OK; 978 } 979 980 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw, 981 struct ieee80211_sta *sta, 982 struct sk_buff *skb) 983 { 984 return false; 985 } 986 987 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work) 988 { 989 struct rtl_works *rtlworks = 990 container_of(work, struct rtl_works, fill_h2c_cmd); 991 struct ieee80211_hw *hw = rtlworks->hw; 992 struct rtl_priv *rtlpriv = rtl_priv(hw); 993 994 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask); 995 } 996 997 static const struct rtl_intf_ops rtl_usb_ops = { 998 .adapter_start = rtl_usb_start, 999 .adapter_stop = rtl_usb_stop, 1000 .adapter_tx = rtl_usb_tx, 1001 .waitq_insert = rtl_usb_tx_chk_waitq_insert, 1002 }; 1003 1004 int rtl_usb_probe(struct usb_interface *intf, 1005 const struct usb_device_id *id, 1006 struct rtl_hal_cfg *rtl_hal_cfg) 1007 { 1008 int err; 1009 struct ieee80211_hw *hw = NULL; 1010 struct rtl_priv *rtlpriv = NULL; 1011 struct usb_device *udev; 1012 struct rtl_usb_priv *usb_priv; 1013 1014 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) + 1015 sizeof(struct rtl_usb_priv), &rtl_ops); 1016 if (!hw) { 1017 WARN_ONCE(true, "rtl_usb: ieee80211 alloc failed\n"); 1018 return -ENOMEM; 1019 } 1020 rtlpriv = hw->priv; 1021 rtlpriv->hw = hw; 1022 rtlpriv->usb_data = kcalloc(RTL_USB_MAX_RX_COUNT, sizeof(u32), 1023 GFP_KERNEL); 1024 if (!rtlpriv->usb_data) { 1025 ieee80211_free_hw(hw); 1026 return -ENOMEM; 1027 } 1028 1029 /* this spin lock must be initialized early */ 1030 spin_lock_init(&rtlpriv->locks.usb_lock); 1031 INIT_WORK(&rtlpriv->works.fill_h2c_cmd, 1032 rtl_fill_h2c_cmd_work_callback); 1033 INIT_WORK(&rtlpriv->works.lps_change_work, 1034 rtl_lps_change_work_callback); 1035 INIT_WORK(&rtlpriv->works.update_beacon_work, 1036 rtl_update_beacon_work_callback); 1037 1038 rtlpriv->usb_data_index = 0; 1039 init_completion(&rtlpriv->firmware_loading_complete); 1040 SET_IEEE80211_DEV(hw, &intf->dev); 1041 udev = interface_to_usbdev(intf); 1042 usb_get_dev(udev); 1043 usb_priv = rtl_usbpriv(hw); 1044 memset(usb_priv, 0, sizeof(*usb_priv)); 1045 usb_priv->dev.intf = intf; 1046 usb_priv->dev.udev = udev; 1047 usb_set_intfdata(intf, hw); 1048 /* init cfg & intf_ops */ 1049 rtlpriv->rtlhal.interface = INTF_USB; 1050 rtlpriv->cfg = rtl_hal_cfg; 1051 rtlpriv->intf_ops = &rtl_usb_ops; 1052 /* Init IO handler */ 1053 _rtl_usb_io_handler_init(&udev->dev, hw); 1054 rtlpriv->cfg->ops->read_chip_version(hw); 1055 /*like read eeprom and so on */ 1056 rtlpriv->cfg->ops->read_eeprom_info(hw); 1057 err = _rtl_usb_init(hw); 1058 if (err) 1059 goto error_out2; 1060 rtl_usb_init_sw(hw); 1061 /* Init mac80211 sw */ 1062 err = rtl_init_core(hw); 1063 if (err) { 1064 pr_err("Can't allocate sw for mac80211\n"); 1065 goto error_out2; 1066 } 1067 if (rtlpriv->cfg->ops->init_sw_vars(hw)) { 1068 pr_err("Can't init_sw_vars\n"); 1069 goto error_out; 1070 } 1071 rtlpriv->cfg->ops->init_sw_leds(hw); 1072 1073 err = ieee80211_register_hw(hw); 1074 if (err) { 1075 pr_err("Can't register mac80211 hw.\n"); 1076 goto error_out; 1077 } 1078 rtlpriv->mac80211.mac80211_registered = 1; 1079 1080 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1081 return 0; 1082 1083 error_out: 1084 rtl_deinit_core(hw); 1085 error_out2: 1086 _rtl_usb_io_handler_release(hw); 1087 usb_put_dev(udev); 1088 complete(&rtlpriv->firmware_loading_complete); 1089 kfree(rtlpriv->usb_data); 1090 ieee80211_free_hw(hw); 1091 return -ENODEV; 1092 } 1093 EXPORT_SYMBOL(rtl_usb_probe); 1094 1095 void rtl_usb_disconnect(struct usb_interface *intf) 1096 { 1097 struct ieee80211_hw *hw = usb_get_intfdata(intf); 1098 struct rtl_priv *rtlpriv = rtl_priv(hw); 1099 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw)); 1100 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 1101 1102 if (unlikely(!rtlpriv)) 1103 return; 1104 /* just in case driver is removed before firmware callback */ 1105 wait_for_completion(&rtlpriv->firmware_loading_complete); 1106 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1107 /*ieee80211_unregister_hw will call ops_stop */ 1108 if (rtlmac->mac80211_registered == 1) { 1109 ieee80211_unregister_hw(hw); 1110 rtlmac->mac80211_registered = 0; 1111 } else { 1112 rtl_deinit_deferred_work(hw, false); 1113 rtlpriv->intf_ops->adapter_stop(hw); 1114 } 1115 /*deinit rfkill */ 1116 /* rtl_deinit_rfkill(hw); */ 1117 rtl_usb_deinit(hw); 1118 rtl_deinit_core(hw); 1119 kfree(rtlpriv->usb_data); 1120 rtlpriv->cfg->ops->deinit_sw_leds(hw); 1121 rtlpriv->cfg->ops->deinit_sw_vars(hw); 1122 _rtl_usb_io_handler_release(hw); 1123 usb_put_dev(rtlusb->udev); 1124 usb_set_intfdata(intf, NULL); 1125 ieee80211_free_hw(hw); 1126 } 1127 EXPORT_SYMBOL(rtl_usb_disconnect); 1128 1129 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message) 1130 { 1131 return 0; 1132 } 1133 EXPORT_SYMBOL(rtl_usb_suspend); 1134 1135 int rtl_usb_resume(struct usb_interface *pusb_intf) 1136 { 1137 return 0; 1138 } 1139 EXPORT_SYMBOL(rtl_usb_resume); 1140