drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
   5  *
   6  ******************************************************************************/
   7 #define _USB_OPS_LINUX_C_
   8
   9 #include <drv_types.h>
  10 #include <recv_osdep.h>
  11 #include <rtw_sreset.h>
  12
  13 #define RTW_USB_CONTROL_MSG_TIMEOUT     500 /* ms */
  14
  15 #define MAX_USBCTRL_VENDORREQ_TIMES     10
  16
  17 #define ALIGNMENT_UNIT                  16
  18 #define MAX_VENDOR_REQ_CMD_SIZE 254
  19 #define MAX_USB_IO_CTL_SIZE     (MAX_VENDOR_REQ_CMD_SIZE + ALIGNMENT_UNIT)
  20
  21 #define REALTEK_USB_VENQT_READ  (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE)
  22 #define REALTEK_USB_VENQT_WRITE (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE)
  23
  24 #define REALTEK_USB_VENQT_CMD_REQ       0x05
  25 #define REALTEK_USB_VENQT_CMD_IDX       0x00
  26
  27 static void interrupt_handler_8188eu(struct adapter *adapt, u16 pkt_len, u8 *pbuf)
  28 {
  29         struct hal_data_8188e *haldata = adapt->HalData;
  30
  31         if (pkt_len != INTERRUPT_MSG_FORMAT_LEN)
  32                 return;
  33
  34         /*  HISR */
  35         memcpy(&haldata->IntArray[0], &pbuf[USB_INTR_CONTENT_HISR_OFFSET], 4);
  36         memcpy(&haldata->IntArray[1], &pbuf[USB_INTR_CONTENT_HISRE_OFFSET], 4);
  37
  38         /*  C2H Event */
  39         if (pbuf[0] != 0)
  40                 memcpy(&haldata->C2hArray[0],
  41                        &pbuf[USB_INTR_CONTENT_C2H_OFFSET], 16);
  42 }
  43
  44 static int recvbuf2recvframe(struct adapter *adapt, struct sk_buff *pskb)
  45 {
  46         u8 *pbuf;
  47         u8 shift_sz = 0;
  48         u16 pkt_cnt;
  49         u32 pkt_offset, skb_len, alloc_sz;
  50         s32 transfer_len;
  51         struct recv_stat *prxstat;
  52         struct phy_stat *pphy_status = NULL;
  53         struct sk_buff *pkt_copy = NULL;
  54         struct recv_frame *precvframe = NULL;
  55         struct rx_pkt_attrib *pattrib = NULL;
  56         struct hal_data_8188e *haldata = adapt->HalData;
  57         struct recv_priv *precvpriv = &adapt->recvpriv;
  58         struct __queue *pfree_recv_queue = &precvpriv->free_recv_queue;
  59
  60         transfer_len = (s32)pskb->len;
  61         pbuf = pskb->data;
  62
  63         prxstat = (struct recv_stat *)pbuf;
  64         pkt_cnt = (le32_to_cpu(prxstat->rxdw2) >> 16) & 0xff;
  65
  66         do {
  67                 prxstat = (struct recv_stat *)pbuf;
  68
  69                 precvframe = rtw_alloc_recvframe(pfree_recv_queue);
  70                 if (!precvframe)
  71                         goto _exit_recvbuf2recvframe;
  72
  73                 INIT_LIST_HEAD(&precvframe->list);
  74
  75                 update_recvframe_attrib_88e(precvframe, prxstat);
  76
  77                 pattrib = &precvframe->attrib;
  78
  79                 if ((pattrib->crc_err) || (pattrib->icv_err)) {
  80                         rtw_free_recvframe(precvframe, pfree_recv_queue);
  81                         goto _exit_recvbuf2recvframe;
  82                 }
  83
  84                 if ((pattrib->physt) && (pattrib->pkt_rpt_type == NORMAL_RX))
  85                         pphy_status = (struct phy_stat *)(pbuf + RXDESC_OFFSET);
  86
  87                 pkt_offset = RXDESC_SIZE + pattrib->drvinfo_sz + pattrib->shift_sz + pattrib->pkt_len;
  88
  89                 if ((pattrib->pkt_len <= 0) || (pkt_offset > transfer_len)) {
  90                         rtw_free_recvframe(precvframe, pfree_recv_queue);
  91                         goto _exit_recvbuf2recvframe;
  92                 }
  93
  94                 /*      Modified by Albert 20101213 */
  95                 /*      For 8 bytes IP header alignment. */
  96                 if (pattrib->qos)       /*      Qos data, wireless lan header length is 26 */
  97                         shift_sz = 6;
  98                 else
  99                         shift_sz = 0;
 100
 101                 skb_len = pattrib->pkt_len;
 102
 103                 /*  for first fragment packet, driver need allocate 1536+drvinfo_sz+RXDESC_SIZE to defrag packet. */
 104                 /*  modify alloc_sz for recvive crc error packet by thomas 2011-06-02 */
 105                 if ((pattrib->mfrag == 1) && (pattrib->frag_num == 0)) {
 106                         if (skb_len <= 1650)
 107                                 alloc_sz = 1664;
 108                         else
 109                                 alloc_sz = skb_len + 14;
 110                 } else {
 111                         alloc_sz = skb_len;
 112                         /*      6 is for IP header 8 bytes alignment in QoS packet case. */
 113                         /*      8 is for skb->data 4 bytes alignment. */
 114                         alloc_sz += 14;
 115                 }
 116
 117                 pkt_copy = netdev_alloc_skb(adapt->pnetdev, alloc_sz);
 118                 if (pkt_copy) {
 119                         pkt_copy->dev = adapt->pnetdev;
 120                         precvframe->pkt = pkt_copy;
 121                         skb_reserve(pkt_copy, 8 - ((size_t)(pkt_copy->data) & 7));/* force pkt_copy->data at 8-byte alignment address */
 122                         skb_reserve(pkt_copy, shift_sz);/* force ip_hdr at 8-byte alignment address according to shift_sz. */
 123                         skb_put_data(pkt_copy, (pbuf + pattrib->drvinfo_sz + RXDESC_SIZE), skb_len);
 124                 } else {
 125                         rtw_free_recvframe(precvframe, pfree_recv_queue);
 126                         goto _exit_recvbuf2recvframe;
 127                 }
 128
 129                 switch (haldata->UsbRxAggMode) {
 130                 case USB_RX_AGG_DMA:
 131                 case USB_RX_AGG_MIX:
 132                         pkt_offset = (u16)round_up(pkt_offset, 128);
 133                         break;
 134                 case USB_RX_AGG_USB:
 135                         pkt_offset = (u16)round_up(pkt_offset, 4);
 136                         break;
 137                 case USB_RX_AGG_DISABLE:
 138                 default:
 139                         break;
 140                 }
 141                 if (pattrib->pkt_rpt_type == NORMAL_RX) { /* Normal rx packet */
 142                         if (pattrib->physt)
 143                                 update_recvframe_phyinfo_88e(precvframe, pphy_status);
 144                         rtw_recv_entry(precvframe);
 145                 } else if (pattrib->pkt_rpt_type == TX_REPORT1) {
 146                         /* CCX-TXRPT ack for xmit mgmt frames. */
 147                         handle_txrpt_ccx_88e(adapt, precvframe->pkt->data);
 148                         rtw_free_recvframe(precvframe, pfree_recv_queue);
 149                 } else if (pattrib->pkt_rpt_type == TX_REPORT2) {
 150                         ODM_RA_TxRPT2Handle_8188E(&haldata->odmpriv,
 151                                                   precvframe->pkt->data,
 152                                                   pattrib->pkt_len,
 153                                                   pattrib->MacIDValidEntry[0],
 154                                                   pattrib->MacIDValidEntry[1]);
 155                         rtw_free_recvframe(precvframe, pfree_recv_queue);
 156                 } else if (pattrib->pkt_rpt_type == HIS_REPORT) {
 157                         interrupt_handler_8188eu(adapt, pattrib->pkt_len, precvframe->pkt->data);
 158                         rtw_free_recvframe(precvframe, pfree_recv_queue);
 159                 }
 160                 pkt_cnt--;
 161                 transfer_len -= pkt_offset;
 162                 pbuf += pkt_offset;
 163                 precvframe = NULL;
 164                 pkt_copy = NULL;
 165
 166                 if (transfer_len > 0 && pkt_cnt == 0)
 167                         pkt_cnt = (le32_to_cpu(prxstat->rxdw2) >> 16) & 0xff;
 168
 169         } while ((transfer_len > 0) && (pkt_cnt > 0));
 170
 171 _exit_recvbuf2recvframe:
 172
 173         return _SUCCESS;
 174 }
 175
 176 static unsigned int ffaddr2pipehdl(struct dvobj_priv *pdvobj, u32 addr)
 177 {
 178         unsigned int pipe = 0, ep_num = 0;
 179         struct usb_device *pusbd = pdvobj->pusbdev;
 180
 181         if (addr == RECV_BULK_IN_ADDR) {
 182                 pipe = usb_rcvbulkpipe(pusbd, pdvobj->RtInPipe[0]);
 183         } else if (addr == RECV_INT_IN_ADDR) {
 184                 pipe = usb_rcvbulkpipe(pusbd, pdvobj->RtInPipe[1]);
 185         } else if (addr < HW_QUEUE_ENTRY) {
 186                 ep_num = pdvobj->Queue2Pipe[addr];
 187                 pipe = usb_sndbulkpipe(pusbd, ep_num);
 188         }
 189
 190         return pipe;
 191 }
 192
 193 static int
 194 usbctrl_vendorreq(struct adapter *adapt, u16 value, void *pdata, u16 len, u8 reqtype)
 195 {
 196         struct dvobj_priv *dvobjpriv = adapter_to_dvobj(adapt);
 197         struct usb_device *udev = dvobjpriv->pusbdev;
 198         unsigned int pipe;
 199         int status = 0;
 200         u8 *pIo_buf;
 201         int vendorreq_times = 0;
 202
 203         if ((adapt->bSurpriseRemoved) || (adapt->pwrctrlpriv.pnp_bstop_trx)) {
 204                 status = -EPERM;
 205                 goto exit;
 206         }
 207
 208         if (len > MAX_VENDOR_REQ_CMD_SIZE) {
 209                 status = -EINVAL;
 210                 goto exit;
 211         }
 212
 213         if (mutex_lock_interruptible(&dvobjpriv->usb_vendor_req_mutex)) {
 214                 status = -ERESTARTSYS;
 215                 goto exit;
 216         }
 217
 218         /*  Acquire IO memory for vendorreq */
 219         pIo_buf = kmalloc(MAX_USB_IO_CTL_SIZE, GFP_ATOMIC);
 220
 221         if (!pIo_buf) {
 222                 status = -ENOMEM;
 223                 goto release_mutex;
 224         }
 225
 226         if (reqtype == REALTEK_USB_VENQT_READ) {
 227                 pipe = usb_rcvctrlpipe(udev, 0);
 228         } else if (reqtype == REALTEK_USB_VENQT_WRITE) {
 229                 pipe = usb_sndctrlpipe(udev, 0);
 230         } else {
 231                 status = -EINVAL;
 232                 goto free_buf;
 233         }
 234
 235         while (++vendorreq_times <= MAX_USBCTRL_VENDORREQ_TIMES) {
 236                 if (reqtype == REALTEK_USB_VENQT_READ)
 237                         memset(pIo_buf, 0, len);
 238                 else
 239                         memcpy(pIo_buf, pdata, len);
 240
 241                 status = usb_control_msg(udev, pipe, REALTEK_USB_VENQT_CMD_REQ,
 242                                          reqtype, value, REALTEK_USB_VENQT_CMD_IDX,
 243                                          pIo_buf, len, RTW_USB_CONTROL_MSG_TIMEOUT);
 244
 245                 if (status == len) {   /*  Success this control transfer. */
 246                         if (reqtype == REALTEK_USB_VENQT_READ)
 247                                 memcpy(pdata, pIo_buf,  len);
 248                 } else { /*  error cases */
 249                         if (status < 0) {
 250                                 if (status == -ESHUTDOWN || status == -ENODEV)
 251                                         adapt->bSurpriseRemoved = true;
 252                                 else
 253                                         adapt->HalData->srestpriv.wifi_error_status = USB_VEN_REQ_CMD_FAIL;
 254                         } else { /*  status != len && status >= 0 */
 255                                 if (status > 0) {
 256                                         if (reqtype == REALTEK_USB_VENQT_READ) {
 257                                                 /*  For Control read transfer, we have to copy the read data from pIo_buf to pdata. */
 258                                                 memcpy(pdata, pIo_buf,  len);
 259                                         }
 260                                 }
 261                         }
 262                 }
 263
 264                 /*  firmware download is checksummed, don't retry */
 265                 if ((value >= FW_8188E_START_ADDRESS && value <= FW_8188E_END_ADDRESS) || status == len)
 266                         break;
 267         }
 268
 269 free_buf:
 270         kfree(pIo_buf);
 271 release_mutex:
 272         mutex_unlock(&dvobjpriv->usb_vendor_req_mutex);
 273 exit:
 274         return status;
 275 }
 276
 277 u8 usb_read8(struct adapter *adapter, u32 addr)
 278 {
 279         u16 wvalue = (u16)(addr & 0xffff);
 280         u8 data;
 281
 282         usbctrl_vendorreq(adapter, wvalue, &data, 1, REALTEK_USB_VENQT_READ);
 283
 284         return data;
 285 }
 286
 287 u16 usb_read16(struct adapter *adapter, u32 addr)
 288 {
 289         u16 wvalue = (u16)(addr & 0xffff);
 290         __le32 data;
 291
 292         usbctrl_vendorreq(adapter, wvalue, &data, 2, REALTEK_USB_VENQT_READ);
 293
 294         return (u16)(le32_to_cpu(data) & 0xffff);
 295 }
 296
 297 u32 usb_read32(struct adapter *adapter, u32 addr)
 298 {
 299         u16 wvalue = (u16)(addr & 0xffff);
 300         __le32 data;
 301
 302         usbctrl_vendorreq(adapter, wvalue, &data, 4, REALTEK_USB_VENQT_READ);
 303
 304         return le32_to_cpu(data);
 305 }
 306
 307 static void usb_read_port_complete(struct urb *purb)
 308 {
 309         struct recv_buf *precvbuf = (struct recv_buf *)purb->context;
 310         struct adapter *adapt = (struct adapter *)precvbuf->adapter;
 311         struct recv_priv *precvpriv = &adapt->recvpriv;
 312
 313         if (adapt->bSurpriseRemoved || adapt->bDriverStopped || adapt->bReadPortCancel) {
 314                 precvbuf->reuse = true;
 315                 return;
 316         }
 317
 318         if (purb->status == 0) { /* SUCCESS */
 319                 if ((purb->actual_length > MAX_RECVBUF_SZ) || (purb->actual_length < RXDESC_SIZE)) {
 320                         precvbuf->reuse = true;
 321                         usb_read_port(adapt, RECV_BULK_IN_ADDR, precvbuf);
 322                 } else {
 323                         skb_put(precvbuf->pskb, purb->actual_length);
 324                         skb_queue_tail(&precvpriv->rx_skb_queue, precvbuf->pskb);
 325
 326                         if (skb_queue_len(&precvpriv->rx_skb_queue) <= 1)
 327                                 tasklet_schedule(&precvpriv->recv_tasklet);
 328
 329                         precvbuf->pskb = NULL;
 330                         precvbuf->reuse = false;
 331                         usb_read_port(adapt, RECV_BULK_IN_ADDR, precvbuf);
 332                 }
 333         } else {
 334                 skb_put(precvbuf->pskb, purb->actual_length);
 335                 precvbuf->pskb = NULL;
 336
 337                 switch (purb->status) {
 338                 case -EINVAL:
 339                 case -EPIPE:
 340                 case -ENODEV:
 341                 case -ESHUTDOWN:
 342                         adapt->bSurpriseRemoved = true;
 343                         fallthrough;
 344                 case -ENOENT:
 345                         adapt->bDriverStopped = true;
 346                         break;
 347                 case -EPROTO:
 348                 case -EOVERFLOW:
 349                         adapt->HalData->srestpriv.wifi_error_status = USB_READ_PORT_FAIL;
 350                         precvbuf->reuse = true;
 351                         usb_read_port(adapt, RECV_BULK_IN_ADDR, precvbuf);
 352                         break;
 353                 case -EINPROGRESS:
 354                         break;
 355                 default:
 356                         break;
 357                 }
 358         }
 359 }
 360
 361 u32 usb_read_port(struct adapter *adapter, u32 addr, struct recv_buf *precvbuf)
 362 {
 363         struct urb *purb = NULL;
 364         struct dvobj_priv *pdvobj = adapter_to_dvobj(adapter);
 365         struct recv_priv *precvpriv = &adapter->recvpriv;
 366         struct usb_device *pusbd = pdvobj->pusbdev;
 367         int err;
 368         unsigned int pipe;
 369         u32 ret = _SUCCESS;
 370
 371         if (adapter->bDriverStopped || adapter->bSurpriseRemoved ||
 372             adapter->pwrctrlpriv.pnp_bstop_trx) {
 373                 return _FAIL;
 374         }
 375
 376         if (!precvbuf)
 377                 return _FAIL;
 378
 379         if (!precvbuf->reuse || !precvbuf->pskb) {
 380                 precvbuf->pskb = skb_dequeue(&precvpriv->free_recv_skb_queue);
 381                 if (precvbuf->pskb)
 382                         precvbuf->reuse = true;
 383         }
 384
 385         /* re-assign for linux based on skb */
 386         if (!precvbuf->reuse || !precvbuf->pskb) {
 387                 precvbuf->pskb = netdev_alloc_skb(adapter->pnetdev, MAX_RECVBUF_SZ);
 388                 if (!precvbuf->pskb)
 389                         return _FAIL;
 390         } else { /* reuse skb */
 391                 precvbuf->reuse = false;
 392         }
 393
 394         purb = precvbuf->purb;
 395
 396         /* translate DMA FIFO addr to pipehandle */
 397         pipe = ffaddr2pipehdl(pdvobj, addr);
 398
 399         usb_fill_bulk_urb(purb, pusbd, pipe,
 400                           precvbuf->pskb->data,
 401                           MAX_RECVBUF_SZ,
 402                           usb_read_port_complete,
 403                           precvbuf);/* context is precvbuf */
 404
 405         err = usb_submit_urb(purb, GFP_ATOMIC);
 406         if ((err) && (err != (-EPERM)))
 407                 ret = _FAIL;
 408
 409         return ret;
 410 }
 411
 412 void rtw_hal_inirp_deinit(struct adapter *padapter)
 413 {
 414         int i;
 415         struct recv_buf *precvbuf;
 416
 417         precvbuf = padapter->recvpriv.precv_buf;
 418
 419         padapter->bReadPortCancel = true;
 420
 421         for (i = 0; i < NR_RECVBUFF; i++) {
 422                 precvbuf->reuse = true;
 423                 if (precvbuf->purb)
 424                         usb_kill_urb(precvbuf->purb);
 425                 precvbuf++;
 426         }
 427 }
 428
 429 int usb_write8(struct adapter *adapter, u32 addr, u8 val)
 430 {
 431         u16 wvalue = (u16)(addr & 0xffff);
 432         u8 data = val;
 433
 434         return usbctrl_vendorreq(adapter, wvalue, &data, 1, REALTEK_USB_VENQT_WRITE);
 435 }
 436
 437 int usb_write16(struct adapter *adapter, u32 addr, u16 val)
 438 {
 439         u16 wvalue = (u16)(addr & 0xffff);
 440         __le32 data = cpu_to_le32(val & 0xffff);
 441
 442         return usbctrl_vendorreq(adapter, wvalue, &data, 2, REALTEK_USB_VENQT_WRITE);
 443 }
 444
 445 int usb_write32(struct adapter *adapter, u32 addr, u32 val)
 446 {
 447         u16 wvalue = (u16)(addr & 0xffff);
 448         __le32 data = cpu_to_le32(val);
 449
 450         return usbctrl_vendorreq(adapter, wvalue, &data, 4, REALTEK_USB_VENQT_WRITE);
 451 }
 452
 453 static void usb_write_port_complete(struct urb *purb)
 454 {
 455         struct xmit_buf *pxmitbuf = (struct xmit_buf *)purb->context;
 456         struct adapter *padapter = pxmitbuf->padapter;
 457         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 458
 459         switch (pxmitbuf->flags) {
 460         case VO_QUEUE_INX:
 461                 pxmitpriv->voq_cnt--;
 462                 break;
 463         case VI_QUEUE_INX:
 464                 pxmitpriv->viq_cnt--;
 465                 break;
 466         case BE_QUEUE_INX:
 467                 pxmitpriv->beq_cnt--;
 468                 break;
 469         case BK_QUEUE_INX:
 470                 pxmitpriv->bkq_cnt--;
 471                 break;
 472         case HIGH_QUEUE_INX:
 473 #ifdef CONFIG_88EU_AP_MODE
 474                 rtw_chk_hi_queue_cmd(padapter);
 475 #endif
 476                 break;
 477         default:
 478                 break;
 479         }
 480
 481         if (padapter->bSurpriseRemoved || padapter->bDriverStopped || padapter->bWritePortCancel)
 482                 goto check_completion;
 483
 484         if (purb->status) {
 485                 if ((purb->status == -EPIPE) || (purb->status == -EPROTO)) {
 486                         sreset_set_wifi_error_status(padapter, USB_WRITE_PORT_FAIL);
 487                 } else if (purb->status == -EINPROGRESS) {
 488                         goto check_completion;
 489                 } else if (purb->status == -ENOENT) {
 490                         goto check_completion;
 491                 } else if (purb->status == -ECONNRESET) {
 492                         goto check_completion;
 493                 } else if (purb->status == -ESHUTDOWN) {
 494                         padapter->bDriverStopped = true;
 495                         goto check_completion;
 496                 } else {
 497                         padapter->bSurpriseRemoved = true;
 498                         goto check_completion;
 499                 }
 500         }
 501
 502 check_completion:
 503         rtw_sctx_done_err(&pxmitbuf->sctx,
 504                           purb->status ? RTW_SCTX_DONE_WRITE_PORT_ERR :
 505                           RTW_SCTX_DONE_SUCCESS);
 506
 507         rtw_free_xmitbuf(pxmitpriv, pxmitbuf);
 508
 509         tasklet_hi_schedule(&pxmitpriv->xmit_tasklet);
 510 }
 511
 512 u32 usb_write_port(struct adapter *padapter, u32 addr, u32 cnt, struct xmit_buf *xmitbuf)
 513 {
 514         unsigned long irqL;
 515         unsigned int pipe;
 516         int status;
 517         u32 ret = _FAIL;
 518         struct urb *purb = NULL;
 519         struct dvobj_priv *pdvobj = adapter_to_dvobj(padapter);
 520         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 521         struct xmit_frame *pxmitframe = (struct xmit_frame *)xmitbuf->priv_data;
 522         struct usb_device *pusbd = pdvobj->pusbdev;
 523
 524         if ((padapter->bDriverStopped) || (padapter->bSurpriseRemoved) ||
 525             (padapter->pwrctrlpriv.pnp_bstop_trx)) {
 526                 rtw_sctx_done_err(&xmitbuf->sctx, RTW_SCTX_DONE_TX_DENY);
 527                 goto exit;
 528         }
 529
 530         spin_lock_irqsave(&pxmitpriv->lock, irqL);
 531
 532         switch (addr) {
 533         case VO_QUEUE_INX:
 534                 pxmitpriv->voq_cnt++;
 535                 xmitbuf->flags = VO_QUEUE_INX;
 536                 break;
 537         case VI_QUEUE_INX:
 538                 pxmitpriv->viq_cnt++;
 539                 xmitbuf->flags = VI_QUEUE_INX;
 540                 break;
 541         case BE_QUEUE_INX:
 542                 pxmitpriv->beq_cnt++;
 543                 xmitbuf->flags = BE_QUEUE_INX;
 544                 break;
 545         case BK_QUEUE_INX:
 546                 pxmitpriv->bkq_cnt++;
 547                 xmitbuf->flags = BK_QUEUE_INX;
 548                 break;
 549         case HIGH_QUEUE_INX:
 550                 xmitbuf->flags = HIGH_QUEUE_INX;
 551                 break;
 552         default:
 553                 xmitbuf->flags = MGT_QUEUE_INX;
 554                 break;
 555         }
 556
 557         spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
 558
 559         purb    = xmitbuf->pxmit_urb[0];
 560
 561         /* translate DMA FIFO addr to pipehandle */
 562         pipe = ffaddr2pipehdl(pdvobj, addr);
 563
 564         usb_fill_bulk_urb(purb, pusbd, pipe,
 565                           pxmitframe->buf_addr, /*  xmitbuf->pbuf */
 566                           cnt,
 567                           usb_write_port_complete,
 568                           xmitbuf);/* context is xmitbuf */
 569
 570         status = usb_submit_urb(purb, GFP_ATOMIC);
 571         if (status) {
 572                 rtw_sctx_done_err(&xmitbuf->sctx, RTW_SCTX_DONE_WRITE_PORT_ERR);
 573                 if (status == -ENODEV)
 574                         padapter->bDriverStopped = true;
 575
 576                 goto exit;
 577         }
 578
 579         ret = _SUCCESS;
 580
 581 exit:
 582         if (ret != _SUCCESS)
 583                 rtw_free_xmitbuf(pxmitpriv, xmitbuf);
 584         return ret;
 585 }
 586
 587 void usb_write_port_cancel(struct adapter *padapter)
 588 {
 589         int i, j;
 590         struct xmit_buf *pxmitbuf = (struct xmit_buf *)padapter->xmitpriv.pxmitbuf;
 591
 592         padapter->bWritePortCancel = true;
 593
 594         for (i = 0; i < NR_XMITBUFF; i++) {
 595                 for (j = 0; j < 8; j++) {
 596                         if (pxmitbuf->pxmit_urb[j])
 597                                 usb_kill_urb(pxmitbuf->pxmit_urb[j]);
 598                 }
 599                 pxmitbuf++;
 600         }
 601
 602         pxmitbuf = (struct xmit_buf *)padapter->xmitpriv.pxmit_extbuf;
 603         for (i = 0; i < NR_XMIT_EXTBUFF; i++) {
 604                 for (j = 0; j < 8; j++) {
 605                         if (pxmitbuf->pxmit_urb[j])
 606                                 usb_kill_urb(pxmitbuf->pxmit_urb[j]);
 607                 }
 608                 pxmitbuf++;
 609         }
 610 }
 611
 612 void rtl8188eu_recv_tasklet(struct tasklet_struct *t)
 613 {
 614         struct sk_buff *pskb;
 615         struct adapter *adapt = from_tasklet(adapt, t, recvpriv.recv_tasklet);
 616         struct recv_priv *precvpriv = &adapt->recvpriv;
 617
 618         while (NULL != (pskb = skb_dequeue(&precvpriv->rx_skb_queue))) {
 619                 if ((adapt->bDriverStopped) || (adapt->bSurpriseRemoved)) {
 620                         dev_kfree_skb_any(pskb);
 621                         break;
 622                 }
 623                 recvbuf2recvframe(adapt, pskb);
 624                 skb_reset_tail_pointer(pskb);
 625                 pskb->len = 0;
 626                 skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
 627         }
 628 }
 629
 630 void rtl8188eu_xmit_tasklet(struct tasklet_struct *t)
 631 {
 632         struct adapter *adapt = from_tasklet(adapt, t, xmitpriv.xmit_tasklet);
 633         struct xmit_priv *pxmitpriv = &adapt->xmitpriv;
 634
 635         if (check_fwstate(&adapt->mlmepriv, _FW_UNDER_SURVEY))
 636                 return;
 637
 638         while (1) {
 639                 if ((adapt->bDriverStopped) || (adapt->bSurpriseRemoved) || (adapt->bWritePortCancel))
 640                         break;
 641
 642                 if (!rtl8188eu_xmitframe_complete(adapt, pxmitpriv))
 643                         break;
 644         }
 645 }