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 rtlusb->rx_work_tasklet.func = (void(*))_rtl_rx_work; 314 rtlusb->rx_work_tasklet.data = (unsigned long)&rtlusb->rx_work_tasklet; 315 316 return 0; 317 } 318 319 static int _rtl_usb_init(struct ieee80211_hw *hw) 320 { 321 struct rtl_priv *rtlpriv = rtl_priv(hw); 322 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 323 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 324 int err; 325 u8 epidx; 326 struct usb_interface *usb_intf = rtlusb->intf; 327 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints; 328 329 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0; 330 for (epidx = 0; epidx < epnums; epidx++) { 331 struct usb_endpoint_descriptor *pep_desc; 332 333 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc; 334 335 if (usb_endpoint_dir_in(pep_desc)) 336 rtlusb->in_ep_nums++; 337 else if (usb_endpoint_dir_out(pep_desc)) 338 rtlusb->out_ep_nums++; 339 340 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, 341 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n", 342 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize, 343 pep_desc->bInterval); 344 } 345 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) { 346 pr_err("Too few input end points found\n"); 347 return -EINVAL; 348 } 349 if (rtlusb->out_ep_nums == 0) { 350 pr_err("No output end points found\n"); 351 return -EINVAL; 352 } 353 /* usb endpoint mapping */ 354 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw); 355 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq; 356 _rtl_usb_init_tx(hw); 357 _rtl_usb_init_rx(hw); 358 return err; 359 } 360 361 static void rtl_usb_init_sw(struct ieee80211_hw *hw) 362 { 363 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 364 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 365 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 366 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 367 368 rtlhal->hw = hw; 369 ppsc->inactiveps = false; 370 ppsc->leisure_ps = false; 371 ppsc->fwctrl_lps = false; 372 ppsc->reg_fwctrl_lps = 3; 373 ppsc->reg_max_lps_awakeintvl = 5; 374 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE; 375 376 /* IBSS */ 377 mac->beacon_interval = 100; 378 379 /* AMPDU */ 380 mac->min_space_cfg = 0; 381 mac->max_mss_density = 0; 382 383 /* set sane AMPDU defaults */ 384 mac->current_ampdu_density = 7; 385 mac->current_ampdu_factor = 3; 386 387 /* QOS */ 388 rtlusb->acm_method = EACMWAY2_SW; 389 390 /* IRQ */ 391 /* HIMR - turn all on */ 392 rtlusb->irq_mask[0] = 0xFFFFFFFF; 393 /* HIMR_EX - turn all on */ 394 rtlusb->irq_mask[1] = 0xFFFFFFFF; 395 rtlusb->disablehwsm = true; 396 } 397 398 static void _rtl_rx_completed(struct urb *urb); 399 400 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb, 401 struct urb *urb, gfp_t gfp_mask) 402 { 403 void *buf; 404 405 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask, 406 &urb->transfer_dma); 407 if (!buf) { 408 pr_err("Failed to usb_alloc_coherent!!\n"); 409 return -ENOMEM; 410 } 411 412 usb_fill_bulk_urb(urb, rtlusb->udev, 413 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep), 414 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb); 415 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 416 417 return 0; 418 } 419 420 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw, 421 struct sk_buff *skb) 422 { 423 struct rtl_priv *rtlpriv = rtl_priv(hw); 424 u8 *rxdesc = skb->data; 425 struct ieee80211_hdr *hdr; 426 bool unicast = false; 427 __le16 fc; 428 struct ieee80211_rx_status rx_status = {0}; 429 struct rtl_stats stats = { 430 .signal = 0, 431 .rate = 0, 432 }; 433 434 skb_pull(skb, RTL_RX_DESC_SIZE); 435 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 436 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 437 hdr = (struct ieee80211_hdr *)(skb->data); 438 fc = hdr->frame_control; 439 if (!stats.crc) { 440 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 441 442 if (is_broadcast_ether_addr(hdr->addr1)) { 443 /*TODO*/; 444 } else if (is_multicast_ether_addr(hdr->addr1)) { 445 /*TODO*/ 446 } else { 447 unicast = true; 448 rtlpriv->stats.rxbytesunicast += skb->len; 449 } 450 451 if (ieee80211_is_data(fc)) { 452 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 453 454 if (unicast) 455 rtlpriv->link_info.num_rx_inperiod++; 456 } 457 /* static bcn for roaming */ 458 rtl_beacon_statistic(hw, skb); 459 } 460 } 461 462 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw, 463 struct sk_buff *skb) 464 { 465 struct rtl_priv *rtlpriv = rtl_priv(hw); 466 u8 *rxdesc = skb->data; 467 struct ieee80211_hdr *hdr; 468 bool unicast = false; 469 __le16 fc; 470 struct ieee80211_rx_status rx_status = {0}; 471 struct rtl_stats stats = { 472 .signal = 0, 473 .rate = 0, 474 }; 475 476 skb_pull(skb, RTL_RX_DESC_SIZE); 477 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 478 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 479 hdr = (struct ieee80211_hdr *)(skb->data); 480 fc = hdr->frame_control; 481 if (!stats.crc) { 482 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 483 484 if (is_broadcast_ether_addr(hdr->addr1)) { 485 /*TODO*/; 486 } else if (is_multicast_ether_addr(hdr->addr1)) { 487 /*TODO*/ 488 } else { 489 unicast = true; 490 rtlpriv->stats.rxbytesunicast += skb->len; 491 } 492 493 if (ieee80211_is_data(fc)) { 494 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 495 496 if (unicast) 497 rtlpriv->link_info.num_rx_inperiod++; 498 } 499 500 /* static bcn for roaming */ 501 rtl_beacon_statistic(hw, skb); 502 503 if (likely(rtl_action_proc(hw, skb, false))) 504 ieee80211_rx(hw, skb); 505 else 506 dev_kfree_skb_any(skb); 507 } else { 508 dev_kfree_skb_any(skb); 509 } 510 } 511 512 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb) 513 { 514 struct sk_buff *_skb; 515 struct sk_buff_head rx_queue; 516 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 517 518 skb_queue_head_init(&rx_queue); 519 if (rtlusb->usb_rx_segregate_hdl) 520 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue); 521 WARN_ON(skb_queue_empty(&rx_queue)); 522 while (!skb_queue_empty(&rx_queue)) { 523 _skb = skb_dequeue(&rx_queue); 524 _rtl_usb_rx_process_agg(hw, _skb); 525 ieee80211_rx(hw, _skb); 526 } 527 } 528 529 #define __RX_SKB_MAX_QUEUED 64 530 531 static void _rtl_rx_work(struct tasklet_struct *t) 532 { 533 struct rtl_usb *rtlusb = from_tasklet(rtlusb, t, rx_work_tasklet); 534 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 535 struct sk_buff *skb; 536 537 while ((skb = skb_dequeue(&rtlusb->rx_queue))) { 538 if (unlikely(IS_USB_STOP(rtlusb))) { 539 dev_kfree_skb_any(skb); 540 continue; 541 } 542 543 if (likely(!rtlusb->usb_rx_segregate_hdl)) { 544 _rtl_usb_rx_process_noagg(hw, skb); 545 } else { 546 /* TO DO */ 547 _rtl_rx_pre_process(hw, skb); 548 pr_err("rx agg not supported\n"); 549 } 550 } 551 } 552 553 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr, 554 unsigned int len) 555 { 556 #if NET_IP_ALIGN != 0 557 unsigned int padding = 0; 558 #endif 559 560 /* make function no-op when possible */ 561 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr)) 562 return 0; 563 564 #if NET_IP_ALIGN != 0 565 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */ 566 /* TODO: deduplicate common code, define helper function instead? */ 567 568 if (ieee80211_is_data_qos(hdr->frame_control)) { 569 u8 *qc = ieee80211_get_qos_ctl(hdr); 570 571 padding ^= NET_IP_ALIGN; 572 573 /* Input might be invalid, avoid accessing memory outside 574 * the buffer. 575 */ 576 if ((unsigned long)qc - (unsigned long)hdr < len && 577 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 578 padding ^= NET_IP_ALIGN; 579 } 580 581 if (ieee80211_has_a4(hdr->frame_control)) 582 padding ^= NET_IP_ALIGN; 583 584 return padding; 585 #endif 586 } 587 588 #define __RADIO_TAP_SIZE_RSV 32 589 590 static void _rtl_rx_completed(struct urb *_urb) 591 { 592 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context; 593 int err = 0; 594 595 if (unlikely(IS_USB_STOP(rtlusb))) 596 goto free; 597 598 if (likely(0 == _urb->status)) { 599 unsigned int padding; 600 struct sk_buff *skb; 601 unsigned int qlen; 602 unsigned int size = _urb->actual_length; 603 struct ieee80211_hdr *hdr; 604 605 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) { 606 pr_err("Too short packet from bulk IN! (len: %d)\n", 607 size); 608 goto resubmit; 609 } 610 611 qlen = skb_queue_len(&rtlusb->rx_queue); 612 if (qlen >= __RX_SKB_MAX_QUEUED) { 613 pr_err("Pending RX skbuff queue full! (qlen: %d)\n", 614 qlen); 615 goto resubmit; 616 } 617 618 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE); 619 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE); 620 621 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding); 622 if (!skb) { 623 pr_err("Can't allocate skb for bulk IN!\n"); 624 goto resubmit; 625 } 626 627 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep); 628 629 /* Make sure the payload data is 4 byte aligned. */ 630 skb_reserve(skb, padding); 631 632 /* reserve some space for mac80211's radiotap */ 633 skb_reserve(skb, __RADIO_TAP_SIZE_RSV); 634 635 skb_put_data(skb, _urb->transfer_buffer, size); 636 637 skb_queue_tail(&rtlusb->rx_queue, skb); 638 tasklet_schedule(&rtlusb->rx_work_tasklet); 639 640 goto resubmit; 641 } 642 643 switch (_urb->status) { 644 /* disconnect */ 645 case -ENOENT: 646 case -ECONNRESET: 647 case -ENODEV: 648 case -ESHUTDOWN: 649 goto free; 650 default: 651 break; 652 } 653 654 resubmit: 655 usb_anchor_urb(_urb, &rtlusb->rx_submitted); 656 err = usb_submit_urb(_urb, GFP_ATOMIC); 657 if (unlikely(err)) { 658 usb_unanchor_urb(_urb); 659 goto free; 660 } 661 return; 662 663 free: 664 /* On some architectures, usb_free_coherent must not be called from 665 * hardirq context. Queue urb to cleanup list. 666 */ 667 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs); 668 } 669 670 #undef __RADIO_TAP_SIZE_RSV 671 672 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw) 673 { 674 struct rtl_priv *rtlpriv = rtl_priv(hw); 675 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 676 struct urb *urb; 677 678 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 679 680 tasklet_kill(&rtlusb->rx_work_tasklet); 681 cancel_work_sync(&rtlpriv->works.lps_change_work); 682 683 if (rtlpriv->works.rtl_wq) { 684 destroy_workqueue(rtlpriv->works.rtl_wq); 685 rtlpriv->works.rtl_wq = NULL; 686 } 687 688 skb_queue_purge(&rtlusb->rx_queue); 689 690 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 691 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 692 urb->transfer_buffer, urb->transfer_dma); 693 usb_free_urb(urb); 694 } 695 } 696 697 static int _rtl_usb_receive(struct ieee80211_hw *hw) 698 { 699 struct urb *urb; 700 int err; 701 int i; 702 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 703 704 WARN_ON(0 == rtlusb->rx_urb_num); 705 /* 1600 == 1514 + max WLAN header + rtk info */ 706 WARN_ON(rtlusb->rx_max_size < 1600); 707 708 for (i = 0; i < rtlusb->rx_urb_num; i++) { 709 err = -ENOMEM; 710 urb = usb_alloc_urb(0, GFP_KERNEL); 711 if (!urb) 712 goto err_out; 713 714 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL); 715 if (err < 0) { 716 pr_err("Failed to prep_rx_urb!!\n"); 717 usb_free_urb(urb); 718 goto err_out; 719 } 720 721 usb_anchor_urb(urb, &rtlusb->rx_submitted); 722 err = usb_submit_urb(urb, GFP_KERNEL); 723 if (err) { 724 usb_unanchor_urb(urb); 725 usb_free_urb(urb); 726 goto err_out; 727 } 728 usb_free_urb(urb); 729 } 730 return 0; 731 732 err_out: 733 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 734 _rtl_usb_cleanup_rx(hw); 735 return err; 736 } 737 738 static int rtl_usb_start(struct ieee80211_hw *hw) 739 { 740 int err; 741 struct rtl_priv *rtlpriv = rtl_priv(hw); 742 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 743 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 744 745 err = rtlpriv->cfg->ops->hw_init(hw); 746 if (!err) { 747 rtl_init_rx_config(hw); 748 749 /* Enable software */ 750 SET_USB_START(rtlusb); 751 /* should after adapter start and interrupt enable. */ 752 set_hal_start(rtlhal); 753 754 /* Start bulk IN */ 755 err = _rtl_usb_receive(hw); 756 } 757 758 return err; 759 } 760 761 /*======================= tx =========================================*/ 762 static void rtl_usb_cleanup(struct ieee80211_hw *hw) 763 { 764 u32 i; 765 struct sk_buff *_skb; 766 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 767 struct ieee80211_tx_info *txinfo; 768 769 /* clean up rx stuff. */ 770 _rtl_usb_cleanup_rx(hw); 771 772 /* clean up tx stuff */ 773 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 774 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) { 775 rtlusb->usb_tx_cleanup(hw, _skb); 776 txinfo = IEEE80211_SKB_CB(_skb); 777 ieee80211_tx_info_clear_status(txinfo); 778 txinfo->flags |= IEEE80211_TX_STAT_ACK; 779 ieee80211_tx_status_irqsafe(hw, _skb); 780 } 781 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]); 782 } 783 usb_kill_anchored_urbs(&rtlusb->tx_submitted); 784 } 785 786 /* We may add some struct into struct rtl_usb later. Do deinit here. */ 787 static void rtl_usb_deinit(struct ieee80211_hw *hw) 788 { 789 rtl_usb_cleanup(hw); 790 } 791 792 static void rtl_usb_stop(struct ieee80211_hw *hw) 793 { 794 struct rtl_priv *rtlpriv = rtl_priv(hw); 795 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 796 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 797 struct urb *urb; 798 799 /* should after adapter start and interrupt enable. */ 800 set_hal_stop(rtlhal); 801 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd); 802 /* Enable software */ 803 SET_USB_STOP(rtlusb); 804 805 /* free pre-allocated URBs from rtl_usb_start() */ 806 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 807 808 tasklet_kill(&rtlusb->rx_work_tasklet); 809 cancel_work_sync(&rtlpriv->works.lps_change_work); 810 811 flush_workqueue(rtlpriv->works.rtl_wq); 812 813 skb_queue_purge(&rtlusb->rx_queue); 814 815 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 816 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 817 urb->transfer_buffer, urb->transfer_dma); 818 usb_free_urb(urb); 819 } 820 821 rtlpriv->cfg->ops->hw_disable(hw); 822 } 823 824 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb) 825 { 826 int err; 827 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 828 829 usb_anchor_urb(_urb, &rtlusb->tx_submitted); 830 err = usb_submit_urb(_urb, GFP_ATOMIC); 831 if (err < 0) { 832 struct sk_buff *skb; 833 834 pr_err("Failed to submit urb\n"); 835 usb_unanchor_urb(_urb); 836 skb = (struct sk_buff *)_urb->context; 837 kfree_skb(skb); 838 } 839 usb_free_urb(_urb); 840 } 841 842 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb, 843 struct sk_buff *skb) 844 { 845 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 846 struct ieee80211_tx_info *txinfo; 847 848 rtlusb->usb_tx_post_hdl(hw, urb, skb); 849 skb_pull(skb, RTL_TX_HEADER_SIZE); 850 txinfo = IEEE80211_SKB_CB(skb); 851 ieee80211_tx_info_clear_status(txinfo); 852 txinfo->flags |= IEEE80211_TX_STAT_ACK; 853 854 if (urb->status) { 855 pr_err("Urb has error status 0x%X\n", urb->status); 856 goto out; 857 } 858 /* TODO: statistics */ 859 out: 860 ieee80211_tx_status_irqsafe(hw, skb); 861 return urb->status; 862 } 863 864 static void _rtl_tx_complete(struct urb *urb) 865 { 866 struct sk_buff *skb = (struct sk_buff *)urb->context; 867 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 868 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0]; 869 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 870 int err; 871 872 if (unlikely(IS_USB_STOP(rtlusb))) 873 return; 874 err = _usb_tx_post(hw, urb, skb); 875 if (err) { 876 /* Ignore error and keep issuiing other urbs */ 877 return; 878 } 879 } 880 881 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw, 882 struct sk_buff *skb, u32 ep_num) 883 { 884 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 885 struct urb *_urb; 886 887 WARN_ON(NULL == skb); 888 _urb = usb_alloc_urb(0, GFP_ATOMIC); 889 if (!_urb) 890 return NULL; 891 _rtl_install_trx_info(rtlusb, skb, ep_num); 892 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev, 893 ep_num), skb->data, skb->len, _rtl_tx_complete, skb); 894 _urb->transfer_flags |= URB_ZERO_PACKET; 895 return _urb; 896 } 897 898 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb, 899 enum rtl_txq qnum) 900 { 901 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 902 u32 ep_num; 903 struct urb *_urb = NULL; 904 905 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl); 906 if (unlikely(IS_USB_STOP(rtlusb))) { 907 pr_err("USB device is stopping...\n"); 908 kfree_skb(skb); 909 return; 910 } 911 ep_num = rtlusb->ep_map.ep_mapping[qnum]; 912 _urb = _rtl_usb_tx_urb_setup(hw, skb, ep_num); 913 if (unlikely(!_urb)) { 914 pr_err("Can't allocate urb. Drop skb!\n"); 915 kfree_skb(skb); 916 return; 917 } 918 _rtl_submit_tx_urb(hw, _urb); 919 } 920 921 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, 922 struct ieee80211_sta *sta, 923 struct sk_buff *skb, 924 u16 hw_queue) 925 { 926 struct rtl_priv *rtlpriv = rtl_priv(hw); 927 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 928 struct rtl_tx_desc *pdesc = NULL; 929 struct rtl_tcb_desc tcb_desc; 930 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 931 __le16 fc = hdr->frame_control; 932 u8 *pda_addr = hdr->addr1; 933 934 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc)); 935 if (ieee80211_is_auth(fc)) { 936 rtl_dbg(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n"); 937 } 938 939 if (rtlpriv->psc.sw_ps_enabled) { 940 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) && 941 !ieee80211_has_pm(fc)) 942 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 943 } 944 945 rtl_action_proc(hw, skb, true); 946 if (is_multicast_ether_addr(pda_addr)) 947 rtlpriv->stats.txbytesmulticast += skb->len; 948 else if (is_broadcast_ether_addr(pda_addr)) 949 rtlpriv->stats.txbytesbroadcast += skb->len; 950 else 951 rtlpriv->stats.txbytesunicast += skb->len; 952 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb, 953 hw_queue, &tcb_desc); 954 if (ieee80211_is_data(fc)) 955 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX); 956 } 957 958 static int rtl_usb_tx(struct ieee80211_hw *hw, 959 struct ieee80211_sta *sta, 960 struct sk_buff *skb, 961 struct rtl_tcb_desc *dummy) 962 { 963 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 964 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 965 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 966 __le16 fc = hdr->frame_control; 967 u16 hw_queue; 968 969 if (unlikely(is_hal_stop(rtlhal))) 970 goto err_free; 971 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb)); 972 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue); 973 _rtl_usb_transmit(hw, skb, hw_queue); 974 return NETDEV_TX_OK; 975 976 err_free: 977 dev_kfree_skb_any(skb); 978 return NETDEV_TX_OK; 979 } 980 981 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw, 982 struct ieee80211_sta *sta, 983 struct sk_buff *skb) 984 { 985 return false; 986 } 987 988 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work) 989 { 990 struct rtl_works *rtlworks = 991 container_of(work, struct rtl_works, fill_h2c_cmd); 992 struct ieee80211_hw *hw = rtlworks->hw; 993 struct rtl_priv *rtlpriv = rtl_priv(hw); 994 995 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask); 996 } 997 998 static const struct rtl_intf_ops rtl_usb_ops = { 999 .adapter_start = rtl_usb_start, 1000 .adapter_stop = rtl_usb_stop, 1001 .adapter_tx = rtl_usb_tx, 1002 .waitq_insert = rtl_usb_tx_chk_waitq_insert, 1003 }; 1004 1005 int rtl_usb_probe(struct usb_interface *intf, 1006 const struct usb_device_id *id, 1007 struct rtl_hal_cfg *rtl_hal_cfg) 1008 { 1009 int err; 1010 struct ieee80211_hw *hw = NULL; 1011 struct rtl_priv *rtlpriv = NULL; 1012 struct usb_device *udev; 1013 struct rtl_usb_priv *usb_priv; 1014 1015 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) + 1016 sizeof(struct rtl_usb_priv), &rtl_ops); 1017 if (!hw) { 1018 WARN_ONCE(true, "rtl_usb: ieee80211 alloc failed\n"); 1019 return -ENOMEM; 1020 } 1021 rtlpriv = hw->priv; 1022 rtlpriv->hw = hw; 1023 rtlpriv->usb_data = kcalloc(RTL_USB_MAX_RX_COUNT, sizeof(u32), 1024 GFP_KERNEL); 1025 if (!rtlpriv->usb_data) { 1026 ieee80211_free_hw(hw); 1027 return -ENOMEM; 1028 } 1029 1030 /* this spin lock must be initialized early */ 1031 spin_lock_init(&rtlpriv->locks.usb_lock); 1032 INIT_WORK(&rtlpriv->works.fill_h2c_cmd, 1033 rtl_fill_h2c_cmd_work_callback); 1034 INIT_WORK(&rtlpriv->works.lps_change_work, 1035 rtl_lps_change_work_callback); 1036 1037 rtlpriv->usb_data_index = 0; 1038 init_completion(&rtlpriv->firmware_loading_complete); 1039 SET_IEEE80211_DEV(hw, &intf->dev); 1040 udev = interface_to_usbdev(intf); 1041 usb_get_dev(udev); 1042 usb_priv = rtl_usbpriv(hw); 1043 memset(usb_priv, 0, sizeof(*usb_priv)); 1044 usb_priv->dev.intf = intf; 1045 usb_priv->dev.udev = udev; 1046 usb_set_intfdata(intf, hw); 1047 /* init cfg & intf_ops */ 1048 rtlpriv->rtlhal.interface = INTF_USB; 1049 rtlpriv->cfg = rtl_hal_cfg; 1050 rtlpriv->intf_ops = &rtl_usb_ops; 1051 /* Init IO handler */ 1052 _rtl_usb_io_handler_init(&udev->dev, hw); 1053 rtlpriv->cfg->ops->read_chip_version(hw); 1054 /*like read eeprom and so on */ 1055 rtlpriv->cfg->ops->read_eeprom_info(hw); 1056 err = _rtl_usb_init(hw); 1057 if (err) 1058 goto error_out2; 1059 rtl_usb_init_sw(hw); 1060 /* Init mac80211 sw */ 1061 err = rtl_init_core(hw); 1062 if (err) { 1063 pr_err("Can't allocate sw for mac80211\n"); 1064 goto error_out2; 1065 } 1066 if (rtlpriv->cfg->ops->init_sw_vars(hw)) { 1067 pr_err("Can't init_sw_vars\n"); 1068 goto error_out; 1069 } 1070 rtlpriv->cfg->ops->init_sw_leds(hw); 1071 1072 err = ieee80211_register_hw(hw); 1073 if (err) { 1074 pr_err("Can't register mac80211 hw.\n"); 1075 err = -ENODEV; 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