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_vendorreq_sync(struct usb_device *udev, u8 reqtype, 27 u16 value, void *pdata, u16 len) 28 { 29 unsigned int pipe; 30 int status; 31 int vendorreq_times = 0; 32 static int count; 33 34 if (reqtype == REALTEK_USB_VENQT_READ) 35 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */ 36 else 37 pipe = usb_sndctrlpipe(udev, 0); /* write_out */ 38 39 do { 40 status = usb_control_msg(udev, pipe, REALTEK_USB_VENQT_CMD_REQ, 41 reqtype, value, REALTEK_USB_VENQT_CMD_IDX, 42 pdata, len, 1000); 43 if (status < 0) { 44 /* firmware download is checksumed, don't retry */ 45 if ((value >= FW_8192C_START_ADDRESS && 46 value <= FW_8192C_END_ADDRESS)) 47 break; 48 } else { 49 break; 50 } 51 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES); 52 53 if (status < 0 && count++ < 4) 54 dev_err(&udev->dev, "reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x reqtype=0x%x\n", 55 value, status, *(u32 *)pdata, reqtype); 56 } 57 58 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len) 59 { 60 struct device *dev = rtlpriv->io.dev; 61 struct usb_device *udev = to_usb_device(dev); 62 u16 wvalue; 63 __le32 *data; 64 unsigned long flags; 65 66 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags); 67 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT) 68 rtlpriv->usb_data_index = 0; 69 data = &rtlpriv->usb_data[rtlpriv->usb_data_index]; 70 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags); 71 72 wvalue = (u16)addr; 73 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_READ, wvalue, data, len); 74 return le32_to_cpu(*data); 75 } 76 77 78 static void _usb_write_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val, u16 len) 79 { 80 struct device *dev = rtlpriv->io.dev; 81 struct usb_device *udev = to_usb_device(dev); 82 unsigned long flags; 83 __le32 *data; 84 u16 wvalue; 85 86 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags); 87 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT) 88 rtlpriv->usb_data_index = 0; 89 data = &rtlpriv->usb_data[rtlpriv->usb_data_index]; 90 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags); 91 92 wvalue = (u16)(addr & 0x0000ffff); 93 *data = cpu_to_le32(val); 94 95 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_WRITE, wvalue, data, len); 96 } 97 98 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr) 99 { 100 return (u8)_usb_read_sync(rtlpriv, addr, 1); 101 } 102 103 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr) 104 { 105 return (u16)_usb_read_sync(rtlpriv, addr, 2); 106 } 107 108 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr) 109 { 110 return _usb_read_sync(rtlpriv, addr, 4); 111 } 112 113 static void _usb_write8_sync(struct rtl_priv *rtlpriv, u32 addr, u8 val) 114 { 115 _usb_write_sync(rtlpriv, addr, val, 1); 116 } 117 118 static void _usb_write16_sync(struct rtl_priv *rtlpriv, u32 addr, u16 val) 119 { 120 _usb_write_sync(rtlpriv, addr, val, 2); 121 } 122 123 static void _usb_write32_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val) 124 { 125 _usb_write_sync(rtlpriv, addr, val, 4); 126 } 127 128 static void _usb_write_chunk_sync(struct rtl_priv *rtlpriv, u32 addr, 129 u32 length, u8 *data) 130 { 131 struct usb_device *udev = to_usb_device(rtlpriv->io.dev); 132 133 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_WRITE, addr, data, length); 134 } 135 136 static void _rtl_usb_io_handler_init(struct device *dev, 137 struct ieee80211_hw *hw) 138 { 139 struct rtl_priv *rtlpriv = rtl_priv(hw); 140 141 rtlpriv->io.dev = dev; 142 mutex_init(&rtlpriv->io.bb_mutex); 143 rtlpriv->io.write8 = _usb_write8_sync; 144 rtlpriv->io.write16 = _usb_write16_sync; 145 rtlpriv->io.write32 = _usb_write32_sync; 146 rtlpriv->io.write_chunk = _usb_write_chunk_sync; 147 rtlpriv->io.read8 = _usb_read8_sync; 148 rtlpriv->io.read16 = _usb_read16_sync; 149 rtlpriv->io.read32 = _usb_read32_sync; 150 } 151 152 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw) 153 { 154 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw); 155 156 mutex_destroy(&rtlpriv->io.bb_mutex); 157 } 158 159 /* Default aggregation handler. Do nothing and just return the oldest skb. */ 160 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw, 161 struct sk_buff_head *list) 162 { 163 return skb_dequeue(list); 164 } 165 166 #define IS_HIGH_SPEED_USB(udev) \ 167 ((USB_SPEED_HIGH == (udev)->speed) ? true : false) 168 169 static int _rtl_usb_init_tx(struct ieee80211_hw *hw) 170 { 171 u32 i; 172 struct rtl_priv *rtlpriv = rtl_priv(hw); 173 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 174 175 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev) 176 ? USB_HIGH_SPEED_BULK_SIZE 177 : USB_FULL_SPEED_BULK_SIZE; 178 179 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n", 180 rtlusb->max_bulk_out_size); 181 182 for (i = 0; i < __RTL_TXQ_NUM; i++) { 183 u32 ep_num = rtlusb->ep_map.ep_mapping[i]; 184 185 if (!ep_num) { 186 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, 187 "Invalid endpoint map setting!\n"); 188 return -EINVAL; 189 } 190 } 191 192 rtlusb->usb_tx_post_hdl = 193 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl; 194 rtlusb->usb_tx_cleanup = 195 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup; 196 rtlusb->usb_tx_aggregate_hdl = 197 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl) 198 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl 199 : &_none_usb_tx_aggregate_hdl; 200 201 init_usb_anchor(&rtlusb->tx_submitted); 202 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 203 skb_queue_head_init(&rtlusb->tx_skb_queue[i]); 204 init_usb_anchor(&rtlusb->tx_pending[i]); 205 } 206 return 0; 207 } 208 209 static void _rtl_rx_work(struct tasklet_struct *t); 210 211 static int _rtl_usb_init_rx(struct ieee80211_hw *hw) 212 { 213 struct rtl_priv *rtlpriv = rtl_priv(hw); 214 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 215 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 216 217 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size; 218 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num; 219 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl; 220 rtlusb->usb_rx_segregate_hdl = 221 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl; 222 223 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n", 224 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep); 225 init_usb_anchor(&rtlusb->rx_submitted); 226 init_usb_anchor(&rtlusb->rx_cleanup_urbs); 227 228 skb_queue_head_init(&rtlusb->rx_queue); 229 tasklet_setup(&rtlusb->rx_work_tasklet, _rtl_rx_work); 230 231 return 0; 232 } 233 234 static int _rtl_usb_init(struct ieee80211_hw *hw) 235 { 236 struct rtl_priv *rtlpriv = rtl_priv(hw); 237 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 238 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 239 int err; 240 u8 epidx; 241 struct usb_interface *usb_intf = rtlusb->intf; 242 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints; 243 244 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0; 245 for (epidx = 0; epidx < epnums; epidx++) { 246 struct usb_endpoint_descriptor *pep_desc; 247 248 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc; 249 250 if (usb_endpoint_dir_in(pep_desc)) { 251 if (usb_endpoint_xfer_bulk(pep_desc)) { 252 /* The vendor drivers assume there is only one 253 * bulk in ep and that it's the first in ep. 254 */ 255 if (rtlusb->in_ep_nums == 0) 256 rtlusb->in_ep = usb_endpoint_num(pep_desc); 257 else 258 pr_warn("%s: bulk in endpoint is not the first in endpoint\n", 259 __func__); 260 } 261 262 rtlusb->in_ep_nums++; 263 } else if (usb_endpoint_dir_out(pep_desc)) { 264 if (rtlusb->out_ep_nums < RTL_USB_MAX_BULKOUT_NUM) { 265 if (usb_endpoint_xfer_bulk(pep_desc)) 266 rtlusb->out_eps[rtlusb->out_ep_nums] = 267 usb_endpoint_num(pep_desc); 268 } else { 269 pr_warn("%s: found more bulk out endpoints than the expected %d\n", 270 __func__, RTL_USB_MAX_BULKOUT_NUM); 271 } 272 273 rtlusb->out_ep_nums++; 274 } 275 276 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, 277 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n", 278 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize, 279 pep_desc->bInterval); 280 } 281 282 if (rtlusb->out_ep_nums == 0) { 283 pr_err("No output end points found\n"); 284 return -EINVAL; 285 } 286 /* usb endpoint mapping */ 287 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw); 288 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq; 289 _rtl_usb_init_tx(hw); 290 _rtl_usb_init_rx(hw); 291 return err; 292 } 293 294 static void rtl_usb_init_sw(struct ieee80211_hw *hw) 295 { 296 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 297 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 298 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 299 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 300 301 rtlhal->hw = hw; 302 ppsc->inactiveps = false; 303 ppsc->leisure_ps = false; 304 ppsc->fwctrl_lps = false; 305 ppsc->reg_fwctrl_lps = 3; 306 ppsc->reg_max_lps_awakeintvl = 5; 307 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE; 308 309 /* IBSS */ 310 mac->beacon_interval = 100; 311 312 /* AMPDU */ 313 mac->min_space_cfg = 0; 314 mac->max_mss_density = 0; 315 316 /* set sane AMPDU defaults */ 317 mac->current_ampdu_density = 7; 318 mac->current_ampdu_factor = 3; 319 320 /* QOS */ 321 rtlusb->acm_method = EACMWAY2_SW; 322 323 /* IRQ */ 324 /* HIMR - turn all on */ 325 rtlusb->irq_mask[0] = 0xFFFFFFFF; 326 /* HIMR_EX - turn all on */ 327 rtlusb->irq_mask[1] = 0xFFFFFFFF; 328 rtlusb->disablehwsm = true; 329 } 330 331 static void _rtl_rx_completed(struct urb *urb); 332 333 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb, 334 struct urb *urb, gfp_t gfp_mask) 335 { 336 void *buf; 337 338 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask, 339 &urb->transfer_dma); 340 if (!buf) { 341 pr_err("Failed to usb_alloc_coherent!!\n"); 342 return -ENOMEM; 343 } 344 345 usb_fill_bulk_urb(urb, rtlusb->udev, 346 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep), 347 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb); 348 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 349 350 return 0; 351 } 352 353 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw, 354 struct sk_buff *skb) 355 { 356 struct rtl_priv *rtlpriv = rtl_priv(hw); 357 u8 *rxdesc = skb->data; 358 struct ieee80211_hdr *hdr; 359 bool unicast = false; 360 __le16 fc; 361 struct ieee80211_rx_status rx_status = {0}; 362 struct rtl_stats stats = { 363 .signal = 0, 364 .rate = 0, 365 }; 366 367 skb_pull(skb, RTL_RX_DESC_SIZE); 368 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 369 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 370 hdr = rtl_get_hdr(skb); 371 fc = hdr->frame_control; 372 if (!stats.crc) { 373 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 374 375 if (is_broadcast_ether_addr(hdr->addr1)) { 376 /*TODO*/; 377 } else if (is_multicast_ether_addr(hdr->addr1)) { 378 /*TODO*/ 379 } else { 380 unicast = true; 381 rtlpriv->stats.rxbytesunicast += skb->len; 382 } 383 384 if (ieee80211_is_data(fc)) { 385 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 386 387 if (unicast) 388 rtlpriv->link_info.num_rx_inperiod++; 389 } 390 /* static bcn for roaming */ 391 rtl_beacon_statistic(hw, skb); 392 } 393 } 394 395 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw, 396 struct sk_buff *skb) 397 { 398 struct rtl_priv *rtlpriv = rtl_priv(hw); 399 u8 *rxdesc = skb->data; 400 struct ieee80211_hdr *hdr; 401 bool unicast = false; 402 __le16 fc; 403 struct ieee80211_rx_status rx_status = {0}; 404 struct rtl_stats stats = { 405 .signal = 0, 406 .rate = 0, 407 }; 408 409 skb_pull(skb, RTL_RX_DESC_SIZE); 410 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 411 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 412 hdr = rtl_get_hdr(skb); 413 fc = hdr->frame_control; 414 if (!stats.crc) { 415 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 416 417 if (is_broadcast_ether_addr(hdr->addr1)) { 418 /*TODO*/; 419 } else if (is_multicast_ether_addr(hdr->addr1)) { 420 /*TODO*/ 421 } else { 422 unicast = true; 423 rtlpriv->stats.rxbytesunicast += skb->len; 424 } 425 426 if (ieee80211_is_data(fc)) { 427 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 428 429 if (unicast) 430 rtlpriv->link_info.num_rx_inperiod++; 431 } 432 433 /* static bcn for roaming */ 434 rtl_beacon_statistic(hw, skb); 435 436 if (likely(rtl_action_proc(hw, skb, false))) 437 ieee80211_rx(hw, skb); 438 else 439 dev_kfree_skb_any(skb); 440 } else { 441 dev_kfree_skb_any(skb); 442 } 443 } 444 445 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb) 446 { 447 struct sk_buff *_skb; 448 struct sk_buff_head rx_queue; 449 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 450 451 skb_queue_head_init(&rx_queue); 452 if (rtlusb->usb_rx_segregate_hdl) 453 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue); 454 WARN_ON(skb_queue_empty(&rx_queue)); 455 while (!skb_queue_empty(&rx_queue)) { 456 _skb = skb_dequeue(&rx_queue); 457 _rtl_usb_rx_process_agg(hw, _skb); 458 ieee80211_rx(hw, _skb); 459 } 460 } 461 462 #define __RX_SKB_MAX_QUEUED 64 463 464 static void _rtl_rx_work(struct tasklet_struct *t) 465 { 466 struct rtl_usb *rtlusb = from_tasklet(rtlusb, t, rx_work_tasklet); 467 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 468 struct sk_buff *skb; 469 470 while ((skb = skb_dequeue(&rtlusb->rx_queue))) { 471 if (unlikely(IS_USB_STOP(rtlusb))) { 472 dev_kfree_skb_any(skb); 473 continue; 474 } 475 476 if (likely(!rtlusb->usb_rx_segregate_hdl)) { 477 _rtl_usb_rx_process_noagg(hw, skb); 478 } else { 479 /* TO DO */ 480 _rtl_rx_pre_process(hw, skb); 481 pr_err("rx agg not supported\n"); 482 } 483 } 484 } 485 486 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr, 487 unsigned int len) 488 { 489 #if NET_IP_ALIGN != 0 490 unsigned int padding = 0; 491 #endif 492 493 /* make function no-op when possible */ 494 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr)) 495 return 0; 496 497 #if NET_IP_ALIGN != 0 498 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */ 499 /* TODO: deduplicate common code, define helper function instead? */ 500 501 if (ieee80211_is_data_qos(hdr->frame_control)) { 502 u8 *qc = ieee80211_get_qos_ctl(hdr); 503 504 padding ^= NET_IP_ALIGN; 505 506 /* Input might be invalid, avoid accessing memory outside 507 * the buffer. 508 */ 509 if ((unsigned long)qc - (unsigned long)hdr < len && 510 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 511 padding ^= NET_IP_ALIGN; 512 } 513 514 if (ieee80211_has_a4(hdr->frame_control)) 515 padding ^= NET_IP_ALIGN; 516 517 return padding; 518 #endif 519 } 520 521 #define __RADIO_TAP_SIZE_RSV 32 522 523 static void _rtl_rx_completed(struct urb *_urb) 524 { 525 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context; 526 int err = 0; 527 528 if (unlikely(IS_USB_STOP(rtlusb))) 529 goto free; 530 531 if (likely(0 == _urb->status)) { 532 unsigned int padding; 533 struct sk_buff *skb; 534 unsigned int qlen; 535 unsigned int size = _urb->actual_length; 536 struct ieee80211_hdr *hdr; 537 538 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) { 539 pr_err("Too short packet from bulk IN! (len: %d)\n", 540 size); 541 goto resubmit; 542 } 543 544 qlen = skb_queue_len(&rtlusb->rx_queue); 545 if (qlen >= __RX_SKB_MAX_QUEUED) { 546 pr_err("Pending RX skbuff queue full! (qlen: %d)\n", 547 qlen); 548 goto resubmit; 549 } 550 551 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE); 552 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE); 553 554 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding); 555 if (!skb) { 556 pr_err("Can't allocate skb for bulk IN!\n"); 557 goto resubmit; 558 } 559 560 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep); 561 562 /* Make sure the payload data is 4 byte aligned. */ 563 skb_reserve(skb, padding); 564 565 /* reserve some space for mac80211's radiotap */ 566 skb_reserve(skb, __RADIO_TAP_SIZE_RSV); 567 568 skb_put_data(skb, _urb->transfer_buffer, size); 569 570 skb_queue_tail(&rtlusb->rx_queue, skb); 571 tasklet_schedule(&rtlusb->rx_work_tasklet); 572 573 goto resubmit; 574 } 575 576 switch (_urb->status) { 577 /* disconnect */ 578 case -ENOENT: 579 case -ECONNRESET: 580 case -ENODEV: 581 case -ESHUTDOWN: 582 goto free; 583 default: 584 break; 585 } 586 587 resubmit: 588 usb_anchor_urb(_urb, &rtlusb->rx_submitted); 589 err = usb_submit_urb(_urb, GFP_ATOMIC); 590 if (unlikely(err)) { 591 usb_unanchor_urb(_urb); 592 goto free; 593 } 594 return; 595 596 free: 597 /* On some architectures, usb_free_coherent must not be called from 598 * hardirq context. Queue urb to cleanup list. 599 */ 600 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs); 601 } 602 603 #undef __RADIO_TAP_SIZE_RSV 604 605 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw) 606 { 607 struct rtl_priv *rtlpriv = rtl_priv(hw); 608 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 609 struct urb *urb; 610 611 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 612 613 tasklet_kill(&rtlusb->rx_work_tasklet); 614 cancel_work_sync(&rtlpriv->works.lps_change_work); 615 616 if (rtlpriv->works.rtl_wq) { 617 destroy_workqueue(rtlpriv->works.rtl_wq); 618 rtlpriv->works.rtl_wq = NULL; 619 } 620 621 skb_queue_purge(&rtlusb->rx_queue); 622 623 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 624 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 625 urb->transfer_buffer, urb->transfer_dma); 626 usb_free_urb(urb); 627 } 628 } 629 630 static int _rtl_usb_receive(struct ieee80211_hw *hw) 631 { 632 struct urb *urb; 633 int err; 634 int i; 635 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 636 637 WARN_ON(0 == rtlusb->rx_urb_num); 638 /* 1600 == 1514 + max WLAN header + rtk info */ 639 WARN_ON(rtlusb->rx_max_size < 1600); 640 641 for (i = 0; i < rtlusb->rx_urb_num; i++) { 642 err = -ENOMEM; 643 urb = usb_alloc_urb(0, GFP_KERNEL); 644 if (!urb) 645 goto err_out; 646 647 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL); 648 if (err < 0) { 649 pr_err("Failed to prep_rx_urb!!\n"); 650 usb_free_urb(urb); 651 goto err_out; 652 } 653 654 usb_anchor_urb(urb, &rtlusb->rx_submitted); 655 err = usb_submit_urb(urb, GFP_KERNEL); 656 if (err) { 657 usb_unanchor_urb(urb); 658 usb_free_urb(urb); 659 goto err_out; 660 } 661 usb_free_urb(urb); 662 } 663 return 0; 664 665 err_out: 666 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 667 return err; 668 } 669 670 static int rtl_usb_start(struct ieee80211_hw *hw) 671 { 672 int err; 673 struct rtl_priv *rtlpriv = rtl_priv(hw); 674 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 675 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 676 677 err = rtlpriv->cfg->ops->hw_init(hw); 678 if (!err) { 679 rtl_init_rx_config(hw); 680 681 /* Enable software */ 682 SET_USB_START(rtlusb); 683 /* should after adapter start and interrupt enable. */ 684 set_hal_start(rtlhal); 685 686 /* Start bulk IN */ 687 err = _rtl_usb_receive(hw); 688 } 689 690 return err; 691 } 692 693 /*======================= tx =========================================*/ 694 static void rtl_usb_cleanup(struct ieee80211_hw *hw) 695 { 696 u32 i; 697 struct sk_buff *_skb; 698 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 699 struct ieee80211_tx_info *txinfo; 700 701 /* clean up rx stuff. */ 702 _rtl_usb_cleanup_rx(hw); 703 704 /* clean up tx stuff */ 705 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 706 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) { 707 rtlusb->usb_tx_cleanup(hw, _skb); 708 txinfo = IEEE80211_SKB_CB(_skb); 709 ieee80211_tx_info_clear_status(txinfo); 710 txinfo->flags |= IEEE80211_TX_STAT_ACK; 711 ieee80211_tx_status_irqsafe(hw, _skb); 712 } 713 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]); 714 } 715 usb_kill_anchored_urbs(&rtlusb->tx_submitted); 716 } 717 718 /* We may add some struct into struct rtl_usb later. Do deinit here. */ 719 static void rtl_usb_deinit(struct ieee80211_hw *hw) 720 { 721 rtl_usb_cleanup(hw); 722 } 723 724 static void rtl_usb_stop(struct ieee80211_hw *hw) 725 { 726 struct rtl_priv *rtlpriv = rtl_priv(hw); 727 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 728 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 729 struct urb *urb; 730 731 /* should after adapter start and interrupt enable. */ 732 set_hal_stop(rtlhal); 733 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd); 734 /* Enable software */ 735 SET_USB_STOP(rtlusb); 736 737 /* free pre-allocated URBs from rtl_usb_start() */ 738 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 739 740 tasklet_kill(&rtlusb->rx_work_tasklet); 741 cancel_work_sync(&rtlpriv->works.lps_change_work); 742 cancel_work_sync(&rtlpriv->works.update_beacon_work); 743 744 flush_workqueue(rtlpriv->works.rtl_wq); 745 746 skb_queue_purge(&rtlusb->rx_queue); 747 748 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 749 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 750 urb->transfer_buffer, urb->transfer_dma); 751 usb_free_urb(urb); 752 } 753 754 rtlpriv->cfg->ops->hw_disable(hw); 755 } 756 757 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb) 758 { 759 int err; 760 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 761 762 usb_anchor_urb(_urb, &rtlusb->tx_submitted); 763 err = usb_submit_urb(_urb, GFP_ATOMIC); 764 if (err < 0) { 765 struct sk_buff *skb; 766 767 pr_err("Failed to submit urb\n"); 768 usb_unanchor_urb(_urb); 769 skb = (struct sk_buff *)_urb->context; 770 kfree_skb(skb); 771 } 772 usb_free_urb(_urb); 773 } 774 775 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb, 776 struct sk_buff *skb) 777 { 778 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 779 struct ieee80211_tx_info *txinfo; 780 781 rtlusb->usb_tx_post_hdl(hw, urb, skb); 782 skb_pull(skb, RTL_TX_HEADER_SIZE); 783 txinfo = IEEE80211_SKB_CB(skb); 784 ieee80211_tx_info_clear_status(txinfo); 785 txinfo->flags |= IEEE80211_TX_STAT_ACK; 786 787 if (urb->status) { 788 pr_err("Urb has error status 0x%X\n", urb->status); 789 goto out; 790 } 791 /* TODO: statistics */ 792 out: 793 ieee80211_tx_status_irqsafe(hw, skb); 794 return urb->status; 795 } 796 797 static void _rtl_tx_complete(struct urb *urb) 798 { 799 struct sk_buff *skb = (struct sk_buff *)urb->context; 800 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 801 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0]; 802 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 803 int err; 804 805 if (unlikely(IS_USB_STOP(rtlusb))) 806 return; 807 err = _usb_tx_post(hw, urb, skb); 808 if (err) { 809 /* Ignore error and keep issuiing other urbs */ 810 return; 811 } 812 } 813 814 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw, 815 struct sk_buff *skb, u32 ep_num) 816 { 817 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 818 struct urb *_urb; 819 820 WARN_ON(NULL == skb); 821 _urb = usb_alloc_urb(0, GFP_ATOMIC); 822 if (!_urb) 823 return NULL; 824 _rtl_install_trx_info(rtlusb, skb, ep_num); 825 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev, 826 ep_num), skb->data, skb->len, _rtl_tx_complete, skb); 827 _urb->transfer_flags |= URB_ZERO_PACKET; 828 return _urb; 829 } 830 831 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb, 832 enum rtl_txq qnum) 833 { 834 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 835 u32 ep_num; 836 struct urb *_urb = NULL; 837 838 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl); 839 if (unlikely(IS_USB_STOP(rtlusb))) { 840 pr_err("USB device is stopping...\n"); 841 kfree_skb(skb); 842 return; 843 } 844 ep_num = rtlusb->ep_map.ep_mapping[qnum]; 845 _urb = _rtl_usb_tx_urb_setup(hw, skb, ep_num); 846 if (unlikely(!_urb)) { 847 pr_err("Can't allocate urb. Drop skb!\n"); 848 kfree_skb(skb); 849 return; 850 } 851 _rtl_submit_tx_urb(hw, _urb); 852 } 853 854 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, 855 struct ieee80211_sta *sta, 856 struct sk_buff *skb, 857 u16 hw_queue) 858 { 859 struct rtl_priv *rtlpriv = rtl_priv(hw); 860 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 861 struct rtl_tx_desc *pdesc = NULL; 862 struct rtl_tcb_desc tcb_desc; 863 struct ieee80211_hdr *hdr = rtl_get_hdr(skb); 864 __le16 fc = hdr->frame_control; 865 u8 *pda_addr = hdr->addr1; 866 867 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc)); 868 if (ieee80211_is_auth(fc)) { 869 rtl_dbg(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n"); 870 } 871 872 if (rtlpriv->psc.sw_ps_enabled) { 873 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) && 874 !ieee80211_has_pm(fc)) 875 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 876 } 877 878 rtl_action_proc(hw, skb, true); 879 if (is_multicast_ether_addr(pda_addr)) 880 rtlpriv->stats.txbytesmulticast += skb->len; 881 else if (is_broadcast_ether_addr(pda_addr)) 882 rtlpriv->stats.txbytesbroadcast += skb->len; 883 else 884 rtlpriv->stats.txbytesunicast += skb->len; 885 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb, 886 hw_queue, &tcb_desc); 887 if (ieee80211_is_data(fc)) 888 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX); 889 } 890 891 static int rtl_usb_tx(struct ieee80211_hw *hw, 892 struct ieee80211_sta *sta, 893 struct sk_buff *skb, 894 struct rtl_tcb_desc *dummy) 895 { 896 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 897 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 898 struct ieee80211_hdr *hdr = rtl_get_hdr(skb); 899 __le16 fc = hdr->frame_control; 900 u16 hw_queue; 901 902 if (unlikely(is_hal_stop(rtlhal))) 903 goto err_free; 904 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb)); 905 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue); 906 _rtl_usb_transmit(hw, skb, hw_queue); 907 return NETDEV_TX_OK; 908 909 err_free: 910 dev_kfree_skb_any(skb); 911 return NETDEV_TX_OK; 912 } 913 914 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw, 915 struct ieee80211_sta *sta, 916 struct sk_buff *skb) 917 { 918 return false; 919 } 920 921 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work) 922 { 923 struct rtl_works *rtlworks = 924 container_of(work, struct rtl_works, fill_h2c_cmd); 925 struct ieee80211_hw *hw = rtlworks->hw; 926 struct rtl_priv *rtlpriv = rtl_priv(hw); 927 928 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask); 929 } 930 931 static const struct rtl_intf_ops rtl_usb_ops = { 932 .adapter_start = rtl_usb_start, 933 .adapter_stop = rtl_usb_stop, 934 .adapter_tx = rtl_usb_tx, 935 .waitq_insert = rtl_usb_tx_chk_waitq_insert, 936 }; 937 938 int rtl_usb_probe(struct usb_interface *intf, 939 const struct usb_device_id *id, 940 struct rtl_hal_cfg *rtl_hal_cfg) 941 { 942 int err; 943 struct ieee80211_hw *hw = NULL; 944 struct rtl_priv *rtlpriv = NULL; 945 struct usb_device *udev; 946 struct rtl_usb_priv *usb_priv; 947 948 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) + 949 sizeof(struct rtl_usb_priv), &rtl_ops); 950 if (!hw) { 951 pr_warn("rtl_usb: ieee80211 alloc failed\n"); 952 return -ENOMEM; 953 } 954 rtlpriv = hw->priv; 955 rtlpriv->hw = hw; 956 rtlpriv->usb_data = kcalloc(RTL_USB_MAX_RX_COUNT, sizeof(u32), 957 GFP_KERNEL); 958 if (!rtlpriv->usb_data) { 959 ieee80211_free_hw(hw); 960 return -ENOMEM; 961 } 962 963 /* this spin lock must be initialized early */ 964 spin_lock_init(&rtlpriv->locks.usb_lock); 965 INIT_WORK(&rtlpriv->works.fill_h2c_cmd, 966 rtl_fill_h2c_cmd_work_callback); 967 INIT_WORK(&rtlpriv->works.lps_change_work, 968 rtl_lps_change_work_callback); 969 INIT_WORK(&rtlpriv->works.update_beacon_work, 970 rtl_update_beacon_work_callback); 971 972 rtlpriv->usb_data_index = 0; 973 init_completion(&rtlpriv->firmware_loading_complete); 974 SET_IEEE80211_DEV(hw, &intf->dev); 975 udev = interface_to_usbdev(intf); 976 usb_get_dev(udev); 977 usb_priv = rtl_usbpriv(hw); 978 memset(usb_priv, 0, sizeof(*usb_priv)); 979 usb_priv->dev.intf = intf; 980 usb_priv->dev.udev = udev; 981 usb_set_intfdata(intf, hw); 982 /* init cfg & intf_ops */ 983 rtlpriv->rtlhal.interface = INTF_USB; 984 rtlpriv->cfg = rtl_hal_cfg; 985 rtlpriv->intf_ops = &rtl_usb_ops; 986 /* Init IO handler */ 987 _rtl_usb_io_handler_init(&udev->dev, hw); 988 rtlpriv->cfg->ops->read_chip_version(hw); 989 /*like read eeprom and so on */ 990 rtlpriv->cfg->ops->read_eeprom_info(hw); 991 err = _rtl_usb_init(hw); 992 if (err) 993 goto error_out2; 994 rtl_usb_init_sw(hw); 995 /* Init mac80211 sw */ 996 err = rtl_init_core(hw); 997 if (err) { 998 pr_err("Can't allocate sw for mac80211\n"); 999 goto error_out2; 1000 } 1001 if (rtlpriv->cfg->ops->init_sw_vars(hw)) { 1002 pr_err("Can't init_sw_vars\n"); 1003 goto error_out; 1004 } 1005 rtl_init_sw_leds(hw); 1006 1007 err = ieee80211_register_hw(hw); 1008 if (err) { 1009 pr_err("Can't register mac80211 hw.\n"); 1010 goto error_out; 1011 } 1012 rtlpriv->mac80211.mac80211_registered = 1; 1013 1014 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1015 return 0; 1016 1017 error_out: 1018 rtl_deinit_core(hw); 1019 error_out2: 1020 _rtl_usb_io_handler_release(hw); 1021 usb_put_dev(udev); 1022 complete(&rtlpriv->firmware_loading_complete); 1023 kfree(rtlpriv->usb_data); 1024 ieee80211_free_hw(hw); 1025 return -ENODEV; 1026 } 1027 EXPORT_SYMBOL(rtl_usb_probe); 1028 1029 void rtl_usb_disconnect(struct usb_interface *intf) 1030 { 1031 struct ieee80211_hw *hw = usb_get_intfdata(intf); 1032 struct rtl_priv *rtlpriv = rtl_priv(hw); 1033 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw)); 1034 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 1035 1036 if (unlikely(!rtlpriv)) 1037 return; 1038 /* just in case driver is removed before firmware callback */ 1039 wait_for_completion(&rtlpriv->firmware_loading_complete); 1040 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1041 /*ieee80211_unregister_hw will call ops_stop */ 1042 if (rtlmac->mac80211_registered == 1) { 1043 ieee80211_unregister_hw(hw); 1044 rtlmac->mac80211_registered = 0; 1045 } else { 1046 rtl_deinit_deferred_work(hw, false); 1047 rtlpriv->intf_ops->adapter_stop(hw); 1048 } 1049 /*deinit rfkill */ 1050 /* rtl_deinit_rfkill(hw); */ 1051 rtl_usb_deinit(hw); 1052 rtl_deinit_core(hw); 1053 kfree(rtlpriv->usb_data); 1054 rtlpriv->cfg->ops->deinit_sw_vars(hw); 1055 _rtl_usb_io_handler_release(hw); 1056 usb_put_dev(rtlusb->udev); 1057 usb_set_intfdata(intf, NULL); 1058 ieee80211_free_hw(hw); 1059 } 1060 EXPORT_SYMBOL(rtl_usb_disconnect); 1061 1062 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message) 1063 { 1064 return 0; 1065 } 1066 EXPORT_SYMBOL(rtl_usb_suspend); 1067 1068 int rtl_usb_resume(struct usb_interface *pusb_intf) 1069 { 1070 return 0; 1071 } 1072 EXPORT_SYMBOL(rtl_usb_resume); 1073