drivers/staging/rtl8712/rtl871x_xmit.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /******************************************************************************
   3  * rtl871x_xmit.c
   4  *
   5  * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
   6  * Linux device driver for RTL8192SU
   7  *
   8  * Modifications for inclusion into the Linux staging tree are
   9  * Copyright(c) 2010 Larry Finger. All rights reserved.
  10  *
  11  * Contact information:
  12  * WLAN FAE <wlanfae@realtek.com>
  13  * Larry Finger <Larry.Finger@lwfinger.net>
  14  *
  15  ******************************************************************************/
  16
  17 #define _RTL871X_XMIT_C_
  18
  19 #include "osdep_service.h"
  20 #include "drv_types.h"
  21 #include "osdep_intf.h"
  22 #include "usb_ops.h"
  23
  24 #include <linux/ieee80211.h>
  25
  26 static const u8 P802_1H_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0xf8};
  27 static const u8 RFC1042_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0x00};
  28 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry);
  29 static void alloc_hwxmits(struct _adapter *padapter);
  30 static void free_hwxmits(struct _adapter *padapter);
  31
  32 static void _init_txservq(struct tx_servq *ptxservq)
  33 {
  34         INIT_LIST_HEAD(&ptxservq->tx_pending);
  35         _init_queue(&ptxservq->sta_pending);
  36         ptxservq->qcnt = 0;
  37 }
  38
  39 void _r8712_init_sta_xmit_priv(struct sta_xmit_priv *psta_xmitpriv)
  40 {
  41         memset((unsigned char *)psta_xmitpriv, 0,
  42                  sizeof(struct sta_xmit_priv));
  43         spin_lock_init(&psta_xmitpriv->lock);
  44         _init_txservq(&psta_xmitpriv->be_q);
  45         _init_txservq(&psta_xmitpriv->bk_q);
  46         _init_txservq(&psta_xmitpriv->vi_q);
  47         _init_txservq(&psta_xmitpriv->vo_q);
  48         INIT_LIST_HEAD(&psta_xmitpriv->legacy_dz);
  49         INIT_LIST_HEAD(&psta_xmitpriv->apsd);
  50 }
  51
  52 int _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
  53                           struct _adapter *padapter)
  54 {
  55         sint i;
  56         struct xmit_buf *pxmitbuf;
  57         struct xmit_frame *pxframe;
  58
  59         memset((unsigned char *)pxmitpriv, 0, sizeof(struct xmit_priv));
  60         spin_lock_init(&pxmitpriv->lock);
  61         /*
  62          *Please insert all the queue initialization using _init_queue below
  63          */
  64         pxmitpriv->adapter = padapter;
  65         _init_queue(&pxmitpriv->be_pending);
  66         _init_queue(&pxmitpriv->bk_pending);
  67         _init_queue(&pxmitpriv->vi_pending);
  68         _init_queue(&pxmitpriv->vo_pending);
  69         _init_queue(&pxmitpriv->bm_pending);
  70         _init_queue(&pxmitpriv->legacy_dz_queue);
  71         _init_queue(&pxmitpriv->apsd_queue);
  72         _init_queue(&pxmitpriv->free_xmit_queue);
  73         /*
  74          * Please allocate memory with sz = (struct xmit_frame) * NR_XMITFRAME,
  75          * and initialize free_xmit_frame below.
  76          * Please also apply  free_txobj to link_up all the xmit_frames...
  77          */
  78         pxmitpriv->pallocated_frame_buf =
  79                 kmalloc(NR_XMITFRAME * sizeof(struct xmit_frame) + 4,
  80                         GFP_ATOMIC);
  81         if (!pxmitpriv->pallocated_frame_buf) {
  82                 pxmitpriv->pxmit_frame_buf = NULL;
  83                 return -ENOMEM;
  84         }
  85         pxmitpriv->pxmit_frame_buf = pxmitpriv->pallocated_frame_buf + 4 -
  86                         ((addr_t) (pxmitpriv->pallocated_frame_buf) & 3);
  87         pxframe = (struct xmit_frame *) pxmitpriv->pxmit_frame_buf;
  88         for (i = 0; i < NR_XMITFRAME; i++) {
  89                 INIT_LIST_HEAD(&(pxframe->list));
  90                 pxframe->padapter = padapter;
  91                 pxframe->frame_tag = DATA_FRAMETAG;
  92                 pxframe->pkt = NULL;
  93                 pxframe->buf_addr = NULL;
  94                 pxframe->pxmitbuf = NULL;
  95                 list_add_tail(&(pxframe->list),
  96                                  &(pxmitpriv->free_xmit_queue.queue));
  97                 pxframe++;
  98         }
  99         pxmitpriv->free_xmitframe_cnt = NR_XMITFRAME;
 100         /*
 101          * init xmit hw_txqueue
 102          */
 103         _r8712_init_hw_txqueue(&pxmitpriv->be_txqueue, BE_QUEUE_INX);
 104         _r8712_init_hw_txqueue(&pxmitpriv->bk_txqueue, BK_QUEUE_INX);
 105         _r8712_init_hw_txqueue(&pxmitpriv->vi_txqueue, VI_QUEUE_INX);
 106         _r8712_init_hw_txqueue(&pxmitpriv->vo_txqueue, VO_QUEUE_INX);
 107         _r8712_init_hw_txqueue(&pxmitpriv->bmc_txqueue, BMC_QUEUE_INX);
 108         pxmitpriv->frag_len = MAX_FRAG_THRESHOLD;
 109         pxmitpriv->txirp_cnt = 1;
 110         /*per AC pending irp*/
 111         pxmitpriv->beq_cnt = 0;
 112         pxmitpriv->bkq_cnt = 0;
 113         pxmitpriv->viq_cnt = 0;
 114         pxmitpriv->voq_cnt = 0;
 115         /*init xmit_buf*/
 116         _init_queue(&pxmitpriv->free_xmitbuf_queue);
 117         _init_queue(&pxmitpriv->pending_xmitbuf_queue);
 118         pxmitpriv->pallocated_xmitbuf =
 119                 kmalloc(NR_XMITBUFF * sizeof(struct xmit_buf) + 4, GFP_ATOMIC);
 120         if (!pxmitpriv->pallocated_xmitbuf) {
 121                 kfree(pxmitpriv->pallocated_frame_buf);
 122                 pxmitpriv->pallocated_frame_buf = NULL;
 123                 return -ENOMEM;
 124         }
 125         pxmitpriv->pxmitbuf = pxmitpriv->pallocated_xmitbuf + 4 -
 126                               ((addr_t)(pxmitpriv->pallocated_xmitbuf) & 3);
 127         pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
 128         for (i = 0; i < NR_XMITBUFF; i++) {
 129                 INIT_LIST_HEAD(&pxmitbuf->list);
 130                 pxmitbuf->pallocated_buf =
 131                         kmalloc(MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ, GFP_ATOMIC);
 132                 if (!pxmitbuf->pallocated_buf)
 133                         return -ENOMEM;
 134                 pxmitbuf->pbuf = pxmitbuf->pallocated_buf + XMITBUF_ALIGN_SZ -
 135                                  ((addr_t) (pxmitbuf->pallocated_buf) &
 136                                  (XMITBUF_ALIGN_SZ - 1));
 137                 if (r8712_xmit_resource_alloc(padapter, pxmitbuf))
 138                         return -ENOMEM;
 139                 list_add_tail(&pxmitbuf->list,
 140                                  &(pxmitpriv->free_xmitbuf_queue.queue));
 141                 pxmitbuf++;
 142         }
 143         pxmitpriv->free_xmitbuf_cnt = NR_XMITBUFF;
 144         INIT_WORK(&padapter->wk_filter_rx_ff0, r8712_SetFilter);
 145         alloc_hwxmits(padapter);
 146         init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
 147         tasklet_setup(&pxmitpriv->xmit_tasklet, r8712_xmit_bh);
 148         return 0;
 149 }
 150
 151 void _free_xmit_priv(struct xmit_priv *pxmitpriv)
 152 {
 153         int i;
 154         struct _adapter *padapter = pxmitpriv->adapter;
 155         struct xmit_frame *pxmitframe = (struct xmit_frame *)
 156                                         pxmitpriv->pxmit_frame_buf;
 157         struct xmit_buf *pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
 158
 159         if (!pxmitpriv->pxmit_frame_buf)
 160                 return;
 161         for (i = 0; i < NR_XMITFRAME; i++) {
 162                 r8712_xmit_complete(padapter, pxmitframe);
 163                 pxmitframe++;
 164         }
 165         for (i = 0; i < NR_XMITBUFF; i++) {
 166                 r8712_xmit_resource_free(padapter, pxmitbuf);
 167                 kfree(pxmitbuf->pallocated_buf);
 168                 pxmitbuf++;
 169         }
 170         kfree(pxmitpriv->pallocated_frame_buf);
 171         kfree(pxmitpriv->pallocated_xmitbuf);
 172         free_hwxmits(padapter);
 173 }
 174
 175 int r8712_update_attrib(struct _adapter *padapter, _pkt *pkt,
 176                         struct pkt_attrib *pattrib)
 177 {
 178         struct pkt_file pktfile;
 179         struct sta_info *psta = NULL;
 180         struct ethhdr etherhdr;
 181
 182         struct tx_cmd txdesc;
 183
 184         bool bmcast;
 185         struct sta_priv         *pstapriv = &padapter->stapriv;
 186         struct security_priv    *psecuritypriv = &padapter->securitypriv;
 187         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 188         struct qos_priv         *pqospriv = &pmlmepriv->qospriv;
 189
 190         _r8712_open_pktfile(pkt, &pktfile);
 191
 192         _r8712_pktfile_read(&pktfile, (unsigned char *)&etherhdr, ETH_HLEN);
 193
 194         pattrib->ether_type = ntohs(etherhdr.h_proto);
 195
 196         /*
 197          * If driver xmit ARP packet, driver can set ps mode to initial
 198          * setting. It stands for getting DHCP or fix IP.
 199          */
 200         if (pattrib->ether_type == 0x0806) {
 201                 if (padapter->pwrctrlpriv.pwr_mode !=
 202                     padapter->registrypriv.power_mgnt) {
 203                         del_timer_sync(&pmlmepriv->dhcp_timer);
 204                         r8712_set_ps_mode(padapter,
 205                                           padapter->registrypriv.power_mgnt,
 206                                           padapter->registrypriv.smart_ps);
 207                 }
 208         }
 209
 210         memcpy(pattrib->dst, &etherhdr.h_dest, ETH_ALEN);
 211         memcpy(pattrib->src, &etherhdr.h_source, ETH_ALEN);
 212         pattrib->pctrl = 0;
 213         if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
 214             check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
 215                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 216                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 217         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
 218                 memcpy(pattrib->ra, get_bssid(pmlmepriv), ETH_ALEN);
 219                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 220         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 221                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 222                 memcpy(pattrib->ta, get_bssid(pmlmepriv), ETH_ALEN);
 223         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 224                 /*firstly, filter packet not belongs to mp*/
 225                 if (pattrib->ether_type != 0x8712)
 226                         return -EINVAL;
 227                 /* for mp storing the txcmd per packet,
 228                  * according to the info of txcmd to update pattrib
 229                  */
 230                 /*get MP_TXDESC_SIZE bytes txcmd per packet*/
 231                 _r8712_pktfile_read(&pktfile, (u8 *)&txdesc, TXDESC_SIZE);
 232                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 233                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 234                 pattrib->pctrl = 1;
 235         }
 236         /* r8712_xmitframe_coalesce() overwrite this!*/
 237         pattrib->pktlen = pktfile.pkt_len;
 238         if (pattrib->ether_type == ETH_P_IP) {
 239                 /* The following is for DHCP and ARP packet, we use cck1M to
 240                  * tx these packets and let LPS awake some time
 241                  * to prevent DHCP protocol fail
 242                  */
 243                 u8 tmp[24];
 244
 245                 _r8712_pktfile_read(&pktfile, &tmp[0], 24);
 246                 pattrib->dhcp_pkt = 0;
 247                 if (pktfile.pkt_len > 282) {/*MINIMUM_DHCP_PACKET_SIZE)*/
 248                         if (pattrib->ether_type == ETH_P_IP) {/* IP header*/
 249                                 if (((tmp[21] == 68) && (tmp[23] == 67)) ||
 250                                         ((tmp[21] == 67) && (tmp[23] == 68))) {
 251                                         /* 68 : UDP BOOTP client
 252                                          * 67 : UDP BOOTP server
 253                                          * Use low rate to send DHCP packet.
 254                                          */
 255                                         pattrib->dhcp_pkt = 1;
 256                                 }
 257                         }
 258                 }
 259         }
 260         bmcast = is_multicast_ether_addr(pattrib->ra);
 261         /* get sta_info*/
 262         if (bmcast) {
 263                 psta = r8712_get_bcmc_stainfo(padapter);
 264                 pattrib->mac_id = 4;
 265         } else {
 266                 if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 267                         psta = r8712_get_stainfo(pstapriv,
 268                                                  get_bssid(pmlmepriv));
 269                         pattrib->mac_id = 5;
 270                 } else {
 271                         psta = r8712_get_stainfo(pstapriv, pattrib->ra);
 272                         if (!psta)  /* drop the pkt */
 273                                 return -ENOMEM;
 274                         if (check_fwstate(pmlmepriv, WIFI_STATION_STATE))
 275                                 pattrib->mac_id = 5;
 276                         else
 277                                 pattrib->mac_id = psta->mac_id;
 278                 }
 279         }
 280
 281         if (psta) {
 282                 pattrib->psta = psta;
 283         } else {
 284                 /* if we cannot get psta => drrp the pkt */
 285                 return -ENOMEM;
 286         }
 287
 288         pattrib->ack_policy = 0;
 289         /* get ether_hdr_len */
 290         pattrib->pkt_hdrlen = ETH_HLEN;
 291
 292         if (pqospriv->qos_option) {
 293                 r8712_set_qos(&pktfile, pattrib);
 294         } else {
 295                 pattrib->hdrlen = WLAN_HDR_A3_LEN;
 296                 pattrib->subtype = IEEE80211_FTYPE_DATA;
 297                 pattrib->priority = 0;
 298         }
 299         if (psta->ieee8021x_blocked) {
 300                 pattrib->encrypt = 0;
 301                 if ((pattrib->ether_type != 0x888e) &&
 302                     !check_fwstate(pmlmepriv, WIFI_MP_STATE))
 303                         return -EINVAL;
 304         } else {
 305                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, bmcast);
 306         }
 307         switch (pattrib->encrypt) {
 308         case _WEP40_:
 309         case _WEP104_:
 310                 pattrib->iv_len = 4;
 311                 pattrib->icv_len = 4;
 312                 break;
 313         case _TKIP_:
 314                 pattrib->iv_len = 8;
 315                 pattrib->icv_len = 4;
 316                 if (padapter->securitypriv.busetkipkey == _FAIL)
 317                         return -EINVAL;
 318                 break;
 319         case _AES_:
 320                 pattrib->iv_len = 8;
 321                 pattrib->icv_len = 8;
 322                 break;
 323         default:
 324                 pattrib->iv_len = 0;
 325                 pattrib->icv_len = 0;
 326                 break;
 327         }
 328
 329         if (pattrib->encrypt &&
 330             (padapter->securitypriv.sw_encrypt ||
 331             !psecuritypriv->hw_decrypted))
 332                 pattrib->bswenc = true;
 333         else
 334                 pattrib->bswenc = false;
 335         /* if in MP_STATE, update pkt_attrib from mp_txcmd, and overwrite
 336          * some settings above.
 337          */
 338         if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
 339                 pattrib->priority =
 340                     (le32_to_cpu(txdesc.txdw1) >> QSEL_SHT) & 0x1f;
 341         return 0;
 342 }
 343
 344 static int xmitframe_addmic(struct _adapter *padapter,
 345                             struct xmit_frame *pxmitframe)
 346 {
 347         u32     curfragnum, length;
 348         u8      *pframe, *payload, mic[8];
 349         struct  mic_data micdata;
 350         struct  sta_info *stainfo;
 351         struct  qos_priv *pqospriv = &(padapter->mlmepriv.qospriv);
 352         struct  pkt_attrib  *pattrib = &pxmitframe->attrib;
 353         struct  security_priv *psecpriv = &padapter->securitypriv;
 354         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 355         u8 priority[4] = {};
 356         bool bmcst = is_multicast_ether_addr(pattrib->ra);
 357
 358         if (pattrib->psta)
 359                 stainfo = pattrib->psta;
 360         else
 361                 stainfo = r8712_get_stainfo(&padapter->stapriv,
 362                                             &pattrib->ra[0]);
 363         if (pattrib->encrypt == _TKIP_) {
 364                 /*encode mic code*/
 365                 if (stainfo) {
 366                         u8 null_key[16] = {};
 367
 368                         pframe = pxmitframe->buf_addr + TXDESC_OFFSET;
 369                         if (bmcst) {
 370                                 if (!memcmp(psecpriv->XGrptxmickey
 371                                    [psecpriv->XGrpKeyid].skey,
 372                                    null_key, 16))
 373                                         return -ENOMEM;
 374                                 /*start to calculate the mic code*/
 375                                 r8712_secmicsetkey(&micdata,
 376                                         psecpriv->XGrptxmickey
 377                                         [psecpriv->XGrpKeyid].skey);
 378                         } else {
 379                                 if (!memcmp(&stainfo->tkiptxmickey.skey[0],
 380                                             null_key, 16))
 381                                         return -ENOMEM;
 382                                 /* start to calculate the mic code */
 383                                 r8712_secmicsetkey(&micdata,
 384                                              &stainfo->tkiptxmickey.skey[0]);
 385                         }
 386                         if (pframe[1] & 1) {   /* ToDS==1 */
 387                                 r8712_secmicappend(&micdata,
 388                                                    &pframe[16], 6); /*DA*/
 389                                 if (pframe[1] & 2)  /* From Ds==1 */
 390                                         r8712_secmicappend(&micdata,
 391                                                            &pframe[24], 6);
 392                                 else
 393                                         r8712_secmicappend(&micdata,
 394                                                            &pframe[10], 6);
 395                         } else {        /* ToDS==0 */
 396                                 r8712_secmicappend(&micdata,
 397                                                    &pframe[4], 6); /* DA */
 398                                 if (pframe[1] & 2)  /* From Ds==1 */
 399                                         r8712_secmicappend(&micdata,
 400                                                            &pframe[16], 6);
 401                                 else
 402                                         r8712_secmicappend(&micdata,
 403                                                            &pframe[10], 6);
 404                         }
 405                         if (pqospriv->qos_option == 1)
 406                                 priority[0] = (u8)pxmitframe->attrib.priority;
 407                         r8712_secmicappend(&micdata, &priority[0], 4);
 408                         payload = pframe;
 409                         for (curfragnum = 0; curfragnum < pattrib->nr_frags;
 410                              curfragnum++) {
 411                                 payload = (u8 *)RND4((addr_t)(payload));
 412                                 payload += pattrib->hdrlen + pattrib->iv_len;
 413                                 if ((curfragnum + 1) == pattrib->nr_frags) {
 414                                         length = pattrib->last_txcmdsz -
 415                                                   pattrib->hdrlen -
 416                                                   pattrib->iv_len -
 417                                                   ((psecpriv->sw_encrypt)
 418                                                   ? pattrib->icv_len : 0);
 419                                         r8712_secmicappend(&micdata, payload,
 420                                                            length);
 421                                         payload = payload + length;
 422                                 } else {
 423                                         length = pxmitpriv->frag_len -
 424                                             pattrib->hdrlen - pattrib->iv_len -
 425                                             ((psecpriv->sw_encrypt) ?
 426                                             pattrib->icv_len : 0);
 427                                         r8712_secmicappend(&micdata, payload,
 428                                                            length);
 429                                         payload = payload + length +
 430                                                   pattrib->icv_len;
 431                                 }
 432                         }
 433                         r8712_secgetmic(&micdata, &(mic[0]));
 434                         /* add mic code  and add the mic code length in
 435                          * last_txcmdsz
 436                          */
 437                         memcpy(payload, &(mic[0]), 8);
 438                         pattrib->last_txcmdsz += 8;
 439                         payload = payload - pattrib->last_txcmdsz + 8;
 440                 }
 441         }
 442         return 0;
 443 }
 444
 445 static sint xmitframe_swencrypt(struct _adapter *padapter,
 446                                 struct xmit_frame *pxmitframe)
 447 {
 448         struct pkt_attrib       *pattrib = &pxmitframe->attrib;
 449
 450         if (pattrib->bswenc) {
 451                 switch (pattrib->encrypt) {
 452                 case _WEP40_:
 453                 case _WEP104_:
 454                         r8712_wep_encrypt(padapter, (u8 *)pxmitframe);
 455                         break;
 456                 case _TKIP_:
 457                         r8712_tkip_encrypt(padapter, (u8 *)pxmitframe);
 458                         break;
 459                 case _AES_:
 460                         r8712_aes_encrypt(padapter, (u8 *)pxmitframe);
 461                         break;
 462                 default:
 463                                 break;
 464                 }
 465         }
 466         return _SUCCESS;
 467 }
 468
 469 static int make_wlanhdr(struct _adapter *padapter, u8 *hdr,
 470                         struct pkt_attrib *pattrib)
 471 {
 472         u16 *qc;
 473
 474         struct ieee80211_hdr *pwlanhdr = (struct ieee80211_hdr *)hdr;
 475         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 476         struct qos_priv *pqospriv = &pmlmepriv->qospriv;
 477         __le16 *fctrl = &pwlanhdr->frame_control;
 478         u8 *bssid;
 479
 480         memset(hdr, 0, WLANHDR_OFFSET);
 481         SetFrameSubType(fctrl, pattrib->subtype);
 482         if (!(pattrib->subtype & IEEE80211_FTYPE_DATA))
 483                 return 0;
 484
 485         bssid = get_bssid(pmlmepriv);
 486
 487         if (check_fwstate(pmlmepriv,  WIFI_STATION_STATE)) {
 488                 /* to_ds = 1, fr_ds = 0; */
 489                 SetToDs(fctrl);
 490                 ether_addr_copy(pwlanhdr->addr1, bssid);
 491                 ether_addr_copy(pwlanhdr->addr2, pattrib->src);
 492                 ether_addr_copy(pwlanhdr->addr3, pattrib->dst);
 493         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 494                 /* to_ds = 0, fr_ds = 1; */
 495                 SetFrDs(fctrl);
 496                 ether_addr_copy(pwlanhdr->addr1, pattrib->dst);
 497                 ether_addr_copy(pwlanhdr->addr2, bssid);
 498                 ether_addr_copy(pwlanhdr->addr3, pattrib->src);
 499         } else if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
 500                    check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
 501                 ether_addr_copy(pwlanhdr->addr1, pattrib->dst);
 502                 ether_addr_copy(pwlanhdr->addr2, pattrib->src);
 503                 ether_addr_copy(pwlanhdr->addr3, bssid);
 504         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 505                 ether_addr_copy(pwlanhdr->addr1, pattrib->dst);
 506                 ether_addr_copy(pwlanhdr->addr2, pattrib->src);
 507                 ether_addr_copy(pwlanhdr->addr3, bssid);
 508         } else {
 509                 return -EINVAL;
 510         }
 511
 512         if (pattrib->encrypt)
 513                 SetPrivacy(fctrl);
 514         if (pqospriv->qos_option) {
 515                 qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
 516                 if (pattrib->priority)
 517                         SetPriority(qc, pattrib->priority);
 518                 SetAckpolicy(qc, pattrib->ack_policy);
 519         }
 520         /* TODO: fill HT Control Field */
 521         /* Update Seq Num will be handled by f/w */
 522         {
 523                 struct sta_info *psta;
 524                 bool bmcst = is_multicast_ether_addr(pattrib->ra);
 525
 526                 if (pattrib->psta)
 527                         psta = pattrib->psta;
 528                 else if (bmcst)
 529                         psta = r8712_get_bcmc_stainfo(padapter);
 530                 else
 531                         psta = r8712_get_stainfo(&padapter->stapriv,
 532                                                  pattrib->ra);
 533
 534                 if (psta) {
 535                         u16 *txtid = psta->sta_xmitpriv.txseq_tid;
 536
 537                         txtid[pattrib->priority]++;
 538                         txtid[pattrib->priority] &= 0xFFF;
 539                         pattrib->seqnum = txtid[pattrib->priority];
 540                         SetSeqNum(hdr, pattrib->seqnum);
 541                 }
 542         }
 543
 544         return 0;
 545 }
 546
 547 static sint r8712_put_snap(u8 *data, u16 h_proto)
 548 {
 549         struct ieee80211_snap_hdr *snap;
 550         const u8 *oui;
 551
 552         snap = (struct ieee80211_snap_hdr *)data;
 553         snap->dsap = 0xaa;
 554         snap->ssap = 0xaa;
 555         snap->ctrl = 0x03;
 556         if (h_proto == 0x8137 || h_proto == 0x80f3)
 557                 oui = P802_1H_OUI;
 558         else
 559                 oui = RFC1042_OUI;
 560         snap->oui[0] = oui[0];
 561         snap->oui[1] = oui[1];
 562         snap->oui[2] = oui[2];
 563         *(__be16 *)(data + SNAP_SIZE) = htons(h_proto);
 564         return SNAP_SIZE + sizeof(u16);
 565 }
 566
 567 /*
 568  * This sub-routine will perform all the following:
 569  * 1. remove 802.3 header.
 570  * 2. create wlan_header, based on the info in pxmitframe
 571  * 3. append sta's iv/ext-iv
 572  * 4. append LLC
 573  * 5. move frag chunk from pframe to pxmitframe->mem
 574  * 6. apply sw-encrypt, if necessary.
 575  */
 576 sint r8712_xmitframe_coalesce(struct _adapter *padapter, _pkt *pkt,
 577                         struct xmit_frame *pxmitframe)
 578 {
 579         struct pkt_file pktfile;
 580
 581         sint    frg_len, mpdu_len, llc_sz;
 582         u32     mem_sz;
 583         u8      frg_inx;
 584         addr_t addr;
 585         u8 *pframe, *mem_start, *ptxdesc;
 586         struct sta_info         *psta;
 587         struct security_priv    *psecpriv = &padapter->securitypriv;
 588         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
 589         struct xmit_priv        *pxmitpriv = &padapter->xmitpriv;
 590         struct pkt_attrib       *pattrib = &pxmitframe->attrib;
 591         u8 *pbuf_start;
 592         bool bmcst = is_multicast_ether_addr(pattrib->ra);
 593
 594         if (!pattrib->psta)
 595                 return _FAIL;
 596         psta = pattrib->psta;
 597         if (!pxmitframe->buf_addr)
 598                 return _FAIL;
 599         pbuf_start = pxmitframe->buf_addr;
 600         ptxdesc = pbuf_start;
 601         mem_start = pbuf_start + TXDESC_OFFSET;
 602         if (make_wlanhdr(padapter, mem_start, pattrib))
 603                 return _FAIL;
 604         _r8712_open_pktfile(pkt, &pktfile);
 605         _r8712_pktfile_read(&pktfile, NULL, (uint) pattrib->pkt_hdrlen);
 606         if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 607                 /* truncate TXDESC_SIZE bytes txcmd if at mp mode for 871x */
 608                 if (pattrib->ether_type == 0x8712) {
 609                         /* take care -  update_txdesc overwrite this */
 610                         _r8712_pktfile_read(&pktfile, ptxdesc, TXDESC_SIZE);
 611                 }
 612         }
 613         pattrib->pktlen = pktfile.pkt_len;
 614         frg_inx = 0;
 615         frg_len = pxmitpriv->frag_len - 4;
 616         while (1) {
 617                 llc_sz = 0;
 618                 mpdu_len = frg_len;
 619                 pframe = mem_start;
 620                 SetMFrag(mem_start);
 621                 pframe += pattrib->hdrlen;
 622                 mpdu_len -= pattrib->hdrlen;
 623                 /* adding icv, if necessary...*/
 624                 if (pattrib->iv_len) {
 625                         if (psta) {
 626                                 switch (pattrib->encrypt) {
 627                                 case _WEP40_:
 628                                 case _WEP104_:
 629                                         WEP_IV(pattrib->iv, psta->txpn,
 630                                                (u8)psecpriv->PrivacyKeyIndex);
 631                                         break;
 632                                 case _TKIP_:
 633                                         if (bmcst)
 634                                                 TKIP_IV(pattrib->iv,
 635                                                     psta->txpn,
 636                                                     (u8)psecpriv->XGrpKeyid);
 637                                         else
 638                                                 TKIP_IV(pattrib->iv, psta->txpn,
 639                                                         0);
 640                                         break;
 641                                 case _AES_:
 642                                         if (bmcst)
 643                                                 AES_IV(pattrib->iv, psta->txpn,
 644                                                     (u8)psecpriv->XGrpKeyid);
 645                                         else
 646                                                 AES_IV(pattrib->iv, psta->txpn,
 647                                                        0);
 648                                         break;
 649                                 }
 650                         }
 651                         memcpy(pframe, pattrib->iv, pattrib->iv_len);
 652                         pframe += pattrib->iv_len;
 653                         mpdu_len -= pattrib->iv_len;
 654                 }
 655                 if (frg_inx == 0) {
 656                         llc_sz = r8712_put_snap(pframe, pattrib->ether_type);
 657                         pframe += llc_sz;
 658                         mpdu_len -= llc_sz;
 659                 }
 660                 if ((pattrib->icv_len > 0) && (pattrib->bswenc))
 661                         mpdu_len -= pattrib->icv_len;
 662                 if (bmcst)
 663                         mem_sz = _r8712_pktfile_read(&pktfile, pframe,
 664                                  pattrib->pktlen);
 665                 else
 666                         mem_sz = _r8712_pktfile_read(&pktfile, pframe,
 667                                  mpdu_len);
 668                 pframe += mem_sz;
 669                 if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
 670                         memcpy(pframe, pattrib->icv, pattrib->icv_len);
 671                         pframe += pattrib->icv_len;
 672                 }
 673                 frg_inx++;
 674                 if (bmcst || r8712_endofpktfile(&pktfile)) {
 675                         pattrib->nr_frags = frg_inx;
 676                         pattrib->last_txcmdsz = pattrib->hdrlen +
 677                                                 pattrib->iv_len +
 678                                                 ((pattrib->nr_frags == 1) ?
 679                                                 llc_sz : 0) +
 680                                                 ((pattrib->bswenc) ?
 681                                                 pattrib->icv_len : 0) + mem_sz;
 682                         ClearMFrag(mem_start);
 683                         break;
 684                 }
 685                 addr = (addr_t)(pframe);
 686                 mem_start = (unsigned char *)RND4(addr) + TXDESC_OFFSET;
 687                 memcpy(mem_start, pbuf_start + TXDESC_OFFSET, pattrib->hdrlen);
 688         }
 689
 690         if (xmitframe_addmic(padapter, pxmitframe))
 691                 return _FAIL;
 692         xmitframe_swencrypt(padapter, pxmitframe);
 693         return _SUCCESS;
 694 }
 695
 696 void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len)
 697 {
 698         uint    protection;
 699         u8      *perp;
 700         uint    erp_len;
 701         struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
 702         struct  registry_priv *pregistrypriv = &padapter->registrypriv;
 703
 704         switch (pxmitpriv->vcs_setting) {
 705         case DISABLE_VCS:
 706                 pxmitpriv->vcs = NONE_VCS;
 707                 break;
 708         case ENABLE_VCS:
 709                 break;
 710         case AUTO_VCS:
 711         default:
 712                 perp = r8712_get_ie(ie, WLAN_EID_ERP_INFO, &erp_len, ie_len);
 713                 if (!perp) {
 714                         pxmitpriv->vcs = NONE_VCS;
 715                 } else {
 716                         protection = (*(perp + 2)) & BIT(1);
 717                         if (protection) {
 718                                 if (pregistrypriv->vcs_type == RTS_CTS)
 719                                         pxmitpriv->vcs = RTS_CTS;
 720                                 else
 721                                         pxmitpriv->vcs = CTS_TO_SELF;
 722                         } else {
 723                                 pxmitpriv->vcs = NONE_VCS;
 724                         }
 725                 }
 726                 break;
 727         }
 728 }
 729
 730 struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
 731 {
 732         unsigned long irqL;
 733         struct xmit_buf *pxmitbuf;
 734         struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
 735
 736         spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
 737         pxmitbuf = list_first_entry_or_null(&pfree_xmitbuf_queue->queue,
 738                                             struct xmit_buf, list);
 739         if (pxmitbuf) {
 740                 list_del_init(&pxmitbuf->list);
 741                 pxmitpriv->free_xmitbuf_cnt--;
 742         }
 743         spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
 744         return pxmitbuf;
 745 }
 746
 747 void r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
 748 {
 749         unsigned long irqL;
 750         struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
 751
 752         if (!pxmitbuf)
 753                 return;
 754         spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
 755         list_del_init(&pxmitbuf->list);
 756         list_add_tail(&(pxmitbuf->list), &pfree_xmitbuf_queue->queue);
 757         pxmitpriv->free_xmitbuf_cnt++;
 758         spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
 759 }
 760
 761 /*
 762  * Calling context:
 763  * 1. OS_TXENTRY
 764  * 2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)
 765  *
 766  * If we turn on USE_RXTHREAD, then, no need for critical section.
 767  * Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...
 768  *
 769  * Must be very very cautious...
 770  *
 771  */
 772 struct xmit_frame *r8712_alloc_xmitframe(struct xmit_priv *pxmitpriv)
 773 {
 774         /*
 775          * Please remember to use all the osdep_service api,
 776          * and lock/unlock or _enter/_exit critical to protect
 777          * pfree_xmit_queue
 778          */
 779         unsigned long irqL;
 780         struct xmit_frame *pxframe;
 781         struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
 782
 783         spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
 784         pxframe = list_first_entry_or_null(&pfree_xmit_queue->queue,
 785                                            struct xmit_frame, list);
 786         if (pxframe) {
 787                 list_del_init(&pxframe->list);
 788                 pxmitpriv->free_xmitframe_cnt--;
 789                 pxframe->buf_addr = NULL;
 790                 pxframe->pxmitbuf = NULL;
 791                 pxframe->attrib.psta = NULL;
 792                 pxframe->pkt = NULL;
 793         }
 794         spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
 795         return pxframe;
 796 }
 797
 798 void r8712_free_xmitframe(struct xmit_priv *pxmitpriv,
 799                           struct xmit_frame *pxmitframe)
 800 {
 801         unsigned long irqL;
 802         struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
 803         struct _adapter *padapter = pxmitpriv->adapter;
 804
 805         if (!pxmitframe)
 806                 return;
 807         spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
 808         list_del_init(&pxmitframe->list);
 809         if (pxmitframe->pkt)
 810                 pxmitframe->pkt = NULL;
 811         list_add_tail(&pxmitframe->list, &pfree_xmit_queue->queue);
 812         pxmitpriv->free_xmitframe_cnt++;
 813         spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
 814         if (netif_queue_stopped(padapter->pnetdev))
 815                 netif_wake_queue(padapter->pnetdev);
 816 }
 817
 818 void r8712_free_xmitframe_ex(struct xmit_priv *pxmitpriv,
 819                       struct xmit_frame *pxmitframe)
 820 {
 821         if (!pxmitframe)
 822                 return;
 823         if (pxmitframe->frame_tag == DATA_FRAMETAG)
 824                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 825 }
 826
 827 void r8712_free_xmitframe_queue(struct xmit_priv *pxmitpriv,
 828                                 struct  __queue *pframequeue)
 829 {
 830         unsigned long irqL;
 831         struct list_head *plist, *phead;
 832         struct  xmit_frame      *pxmitframe;
 833
 834         spin_lock_irqsave(&(pframequeue->lock), irqL);
 835         phead = &pframequeue->queue;
 836         plist = phead->next;
 837         while (!end_of_queue_search(phead, plist)) {
 838                 pxmitframe = container_of(plist, struct xmit_frame, list);
 839                 plist = plist->next;
 840                 r8712_free_xmitframe(pxmitpriv, pxmitframe);
 841         }
 842         spin_unlock_irqrestore(&(pframequeue->lock), irqL);
 843 }
 844
 845 static inline struct tx_servq *get_sta_pending(struct _adapter *padapter,
 846                                                struct  __queue **ppstapending,
 847                                                struct sta_info *psta, sint up)
 848 {
 849         struct tx_servq *ptxservq;
 850         struct hw_xmit *phwxmits =  padapter->xmitpriv.hwxmits;
 851
 852         switch (up) {
 853         case 1:
 854         case 2:
 855                 ptxservq = &(psta->sta_xmitpriv.bk_q);
 856                 *ppstapending = &padapter->xmitpriv.bk_pending;
 857                 (phwxmits + 3)->accnt++;
 858                 break;
 859         case 4:
 860         case 5:
 861                 ptxservq = &(psta->sta_xmitpriv.vi_q);
 862                 *ppstapending = &padapter->xmitpriv.vi_pending;
 863                 (phwxmits + 1)->accnt++;
 864                 break;
 865         case 6:
 866         case 7:
 867                 ptxservq = &(psta->sta_xmitpriv.vo_q);
 868                 *ppstapending = &padapter->xmitpriv.vo_pending;
 869                 (phwxmits + 0)->accnt++;
 870                 break;
 871         case 0:
 872         case 3:
 873         default:
 874                 ptxservq = &(psta->sta_xmitpriv.be_q);
 875                 *ppstapending = &padapter->xmitpriv.be_pending;
 876                 (phwxmits + 2)->accnt++;
 877                 break;
 878         }
 879         return ptxservq;
 880 }
 881
 882 /*
 883  * Will enqueue pxmitframe to the proper queue, and indicate it
 884  * to xx_pending list.....
 885  */
 886 int r8712_xmit_classifier(struct _adapter *padapter,
 887                           struct xmit_frame *pxmitframe)
 888 {
 889         unsigned long irqL0;
 890         struct  __queue *pstapending;
 891         struct sta_info *psta;
 892         struct tx_servq *ptxservq;
 893         struct pkt_attrib *pattrib = &pxmitframe->attrib;
 894         struct sta_priv *pstapriv = &padapter->stapriv;
 895         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 896         bool bmcst = is_multicast_ether_addr(pattrib->ra);
 897
 898         if (pattrib->psta) {
 899                 psta = pattrib->psta;
 900         } else {
 901                 if (bmcst) {
 902                         psta = r8712_get_bcmc_stainfo(padapter);
 903                 } else {
 904                         if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
 905                                 psta = r8712_get_stainfo(pstapriv,
 906                                        get_bssid(pmlmepriv));
 907                         else
 908                                 psta = r8712_get_stainfo(pstapriv, pattrib->ra);
 909                 }
 910         }
 911         if (!psta)
 912                 return -EINVAL;
 913         ptxservq = get_sta_pending(padapter, &pstapending,
 914                    psta, pattrib->priority);
 915         spin_lock_irqsave(&pstapending->lock, irqL0);
 916         if (list_empty(&ptxservq->tx_pending))
 917                 list_add_tail(&ptxservq->tx_pending, &pstapending->queue);
 918         list_add_tail(&pxmitframe->list, &ptxservq->sta_pending.queue);
 919         ptxservq->qcnt++;
 920         spin_unlock_irqrestore(&pstapending->lock, irqL0);
 921         return 0;
 922 }
 923
 924 static void alloc_hwxmits(struct _adapter *padapter)
 925 {
 926         struct hw_xmit *hwxmits;
 927         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 928
 929         pxmitpriv->hwxmit_entry = HWXMIT_ENTRY;
 930         pxmitpriv->hwxmits = kmalloc_array(pxmitpriv->hwxmit_entry,
 931                                 sizeof(struct hw_xmit), GFP_ATOMIC);
 932         if (!pxmitpriv->hwxmits)
 933                 return;
 934         hwxmits = pxmitpriv->hwxmits;
 935         if (pxmitpriv->hwxmit_entry == 5) {
 936                 pxmitpriv->bmc_txqueue.head = 0;
 937                 hwxmits[0] .phwtxqueue = &pxmitpriv->bmc_txqueue;
 938                 hwxmits[0] .sta_queue = &pxmitpriv->bm_pending;
 939                 pxmitpriv->vo_txqueue.head = 0;
 940                 hwxmits[1] .phwtxqueue = &pxmitpriv->vo_txqueue;
 941                 hwxmits[1] .sta_queue = &pxmitpriv->vo_pending;
 942                 pxmitpriv->vi_txqueue.head = 0;
 943                 hwxmits[2] .phwtxqueue = &pxmitpriv->vi_txqueue;
 944                 hwxmits[2] .sta_queue = &pxmitpriv->vi_pending;
 945                 pxmitpriv->bk_txqueue.head = 0;
 946                 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
 947                 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
 948                 pxmitpriv->be_txqueue.head = 0;
 949                 hwxmits[4] .phwtxqueue = &pxmitpriv->be_txqueue;
 950                 hwxmits[4] .sta_queue = &pxmitpriv->be_pending;
 951         } else if (pxmitpriv->hwxmit_entry == 4) {
 952                 pxmitpriv->vo_txqueue.head = 0;
 953                 hwxmits[0] .phwtxqueue = &pxmitpriv->vo_txqueue;
 954                 hwxmits[0] .sta_queue = &pxmitpriv->vo_pending;
 955                 pxmitpriv->vi_txqueue.head = 0;
 956                 hwxmits[1] .phwtxqueue = &pxmitpriv->vi_txqueue;
 957                 hwxmits[1] .sta_queue = &pxmitpriv->vi_pending;
 958                 pxmitpriv->be_txqueue.head = 0;
 959                 hwxmits[2] .phwtxqueue = &pxmitpriv->be_txqueue;
 960                 hwxmits[2] .sta_queue = &pxmitpriv->be_pending;
 961                 pxmitpriv->bk_txqueue.head = 0;
 962                 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
 963                 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
 964         }
 965 }
 966
 967 static void free_hwxmits(struct _adapter *padapter)
 968 {
 969         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
 970
 971         kfree(pxmitpriv->hwxmits);
 972 }
 973
 974 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry)
 975 {
 976         sint i;
 977
 978         for (i = 0; i < entry; i++, phwxmit++) {
 979                 spin_lock_init(&phwxmit->xmit_lock);
 980                 INIT_LIST_HEAD(&phwxmit->pending);
 981                 phwxmit->txcmdcnt = 0;
 982                 phwxmit->accnt = 0;
 983         }
 984 }
 985
 986 void xmitframe_xmitbuf_attach(struct xmit_frame *pxmitframe,
 987                         struct xmit_buf *pxmitbuf)
 988 {
 989         /* pxmitbuf attach to pxmitframe */
 990         pxmitframe->pxmitbuf = pxmitbuf;
 991         /* urb and irp connection */
 992         pxmitframe->pxmit_urb[0] = pxmitbuf->pxmit_urb[0];
 993         /* buffer addr assoc */
 994         pxmitframe->buf_addr = pxmitbuf->pbuf;
 995         /* pxmitframe attach to pxmitbuf */
 996         pxmitbuf->priv_data = pxmitframe;
 997 }
 998
 999 /*
1000  * tx_action == 0 == no frames to transmit
1001  * tx_action > 0 ==> we have frames to transmit
1002  * tx_action < 0 ==> we have frames to transmit, but TXFF is not even enough
1003  *                                               to transmit 1 frame.
1004  */
1005
1006 int r8712_pre_xmit(struct _adapter *padapter, struct xmit_frame *pxmitframe)
1007 {
1008         unsigned long irqL;
1009         int ret;
1010         struct xmit_buf *pxmitbuf = NULL;
1011         struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
1012         struct pkt_attrib *pattrib = &pxmitframe->attrib;
1013
1014         r8712_do_queue_select(padapter, pattrib);
1015         spin_lock_irqsave(&pxmitpriv->lock, irqL);
1016         if (r8712_txframes_sta_ac_pending(padapter, pattrib) > 0) {
1017                 ret = false;
1018                 r8712_xmit_enqueue(padapter, pxmitframe);
1019                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1020                 return ret;
1021         }
1022         pxmitbuf = r8712_alloc_xmitbuf(pxmitpriv);
1023         if (!pxmitbuf) { /*enqueue packet*/
1024                 ret = false;
1025                 r8712_xmit_enqueue(padapter, pxmitframe);
1026                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1027         } else { /*dump packet directly*/
1028                 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1029                 ret = true;
1030                 xmitframe_xmitbuf_attach(pxmitframe, pxmitbuf);
1031                 r8712_xmit_direct(padapter, pxmitframe);
1032         }
1033         return ret;
1034 }