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 *)ðerhdr, 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, ðerhdr.h_dest, ETH_ALEN); 211 memcpy(pattrib->src, ðerhdr.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 } 1035