1 /******************************************************************************
2 * rtl871x_xmit.c
3 *
4 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
5 * Linux device driver for RTL8192SU
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
19 *
20 * Modifications for inclusion into the Linux staging tree are
21 * Copyright(c) 2010 Larry Finger. All rights reserved.
22 *
23 * Contact information:
24 * WLAN FAE <wlanfae@realtek.com>
25 * Larry Finger <Larry.Finger@lwfinger.net>
26 *
27 ******************************************************************************/
28
29 #define _RTL871X_XMIT_C_
30
31 #include "osdep_service.h"
32 #include "drv_types.h"
33 #include "wifi.h"
34 #include "osdep_intf.h"
35 #include "usb_ops.h"
36
37
38 static const u8 P802_1H_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0xf8};
39 static const u8 RFC1042_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0x00};
40 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry);
41 static void alloc_hwxmits(struct _adapter *padapter);
42 static void free_hwxmits(struct _adapter *padapter);
43
_init_txservq(struct tx_servq * ptxservq)44 static void _init_txservq(struct tx_servq *ptxservq)
45 {
46 INIT_LIST_HEAD(&ptxservq->tx_pending);
47 _init_queue(&ptxservq->sta_pending);
48 ptxservq->qcnt = 0;
49 }
50
_r8712_init_sta_xmit_priv(struct sta_xmit_priv * psta_xmitpriv)51 void _r8712_init_sta_xmit_priv(struct sta_xmit_priv *psta_xmitpriv)
52 {
53 memset((unsigned char *)psta_xmitpriv, 0,
54 sizeof(struct sta_xmit_priv));
55 spin_lock_init(&psta_xmitpriv->lock);
56 _init_txservq(&psta_xmitpriv->be_q);
57 _init_txservq(&psta_xmitpriv->bk_q);
58 _init_txservq(&psta_xmitpriv->vi_q);
59 _init_txservq(&psta_xmitpriv->vo_q);
60 INIT_LIST_HEAD(&psta_xmitpriv->legacy_dz);
61 INIT_LIST_HEAD(&psta_xmitpriv->apsd);
62 }
63
_r8712_init_xmit_priv(struct xmit_priv * pxmitpriv,struct _adapter * padapter)64 sint _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
65 struct _adapter *padapter)
66 {
67 sint i;
68 struct xmit_buf *pxmitbuf;
69 struct xmit_frame *pxframe;
70
71 memset((unsigned char *)pxmitpriv, 0, sizeof(struct xmit_priv));
72 spin_lock_init(&pxmitpriv->lock);
73 /*
74 *Please insert all the queue initialization using _init_queue below
75 */
76 pxmitpriv->adapter = padapter;
77 _init_queue(&pxmitpriv->be_pending);
78 _init_queue(&pxmitpriv->bk_pending);
79 _init_queue(&pxmitpriv->vi_pending);
80 _init_queue(&pxmitpriv->vo_pending);
81 _init_queue(&pxmitpriv->bm_pending);
82 _init_queue(&pxmitpriv->legacy_dz_queue);
83 _init_queue(&pxmitpriv->apsd_queue);
84 _init_queue(&pxmitpriv->free_xmit_queue);
85 /*
86 * Please allocate memory with the sz = (struct xmit_frame) * NR_XMITFRAME,
87 * and initialize free_xmit_frame below.
88 * Please also apply free_txobj to link_up all the xmit_frames...
89 */
90 pxmitpriv->pallocated_frame_buf = kmalloc(NR_XMITFRAME * sizeof(struct xmit_frame) + 4,
91 GFP_ATOMIC);
92 if (!pxmitpriv->pallocated_frame_buf) {
93 pxmitpriv->pxmit_frame_buf = NULL;
94 return _FAIL;
95 }
96 pxmitpriv->pxmit_frame_buf = pxmitpriv->pallocated_frame_buf + 4 -
97 ((addr_t) (pxmitpriv->pallocated_frame_buf) & 3);
98 pxframe = (struct xmit_frame *) pxmitpriv->pxmit_frame_buf;
99 for (i = 0; i < NR_XMITFRAME; i++) {
100 INIT_LIST_HEAD(&(pxframe->list));
101 pxframe->padapter = padapter;
102 pxframe->frame_tag = DATA_FRAMETAG;
103 pxframe->pkt = NULL;
104 pxframe->buf_addr = NULL;
105 pxframe->pxmitbuf = NULL;
106 list_add_tail(&(pxframe->list),
107 &(pxmitpriv->free_xmit_queue.queue));
108 pxframe++;
109 }
110 pxmitpriv->free_xmitframe_cnt = NR_XMITFRAME;
111 /*
112 * init xmit hw_txqueue
113 */
114 _r8712_init_hw_txqueue(&pxmitpriv->be_txqueue, BE_QUEUE_INX);
115 _r8712_init_hw_txqueue(&pxmitpriv->bk_txqueue, BK_QUEUE_INX);
116 _r8712_init_hw_txqueue(&pxmitpriv->vi_txqueue, VI_QUEUE_INX);
117 _r8712_init_hw_txqueue(&pxmitpriv->vo_txqueue, VO_QUEUE_INX);
118 _r8712_init_hw_txqueue(&pxmitpriv->bmc_txqueue, BMC_QUEUE_INX);
119 pxmitpriv->frag_len = MAX_FRAG_THRESHOLD;
120 pxmitpriv->txirp_cnt = 1;
121 /*per AC pending irp*/
122 pxmitpriv->beq_cnt = 0;
123 pxmitpriv->bkq_cnt = 0;
124 pxmitpriv->viq_cnt = 0;
125 pxmitpriv->voq_cnt = 0;
126 /*init xmit_buf*/
127 _init_queue(&pxmitpriv->free_xmitbuf_queue);
128 _init_queue(&pxmitpriv->pending_xmitbuf_queue);
129 pxmitpriv->pallocated_xmitbuf = kmalloc(NR_XMITBUFF * sizeof(struct xmit_buf) + 4,
130 GFP_ATOMIC);
131 if (!pxmitpriv->pallocated_xmitbuf) {
132 kfree(pxmitpriv->pallocated_frame_buf);
133 pxmitpriv->pallocated_frame_buf = NULL;
134 return _FAIL;
135 }
136 pxmitpriv->pxmitbuf = pxmitpriv->pallocated_xmitbuf + 4 -
137 ((addr_t)(pxmitpriv->pallocated_xmitbuf) & 3);
138 pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
139 for (i = 0; i < NR_XMITBUFF; i++) {
140 INIT_LIST_HEAD(&pxmitbuf->list);
141 pxmitbuf->pallocated_buf = kmalloc(MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ,
142 GFP_ATOMIC);
143 if (!pxmitbuf->pallocated_buf)
144 return _FAIL;
145 pxmitbuf->pbuf = pxmitbuf->pallocated_buf + XMITBUF_ALIGN_SZ -
146 ((addr_t) (pxmitbuf->pallocated_buf) &
147 (XMITBUF_ALIGN_SZ - 1));
148 r8712_xmit_resource_alloc(padapter, pxmitbuf);
149 list_add_tail(&pxmitbuf->list,
150 &(pxmitpriv->free_xmitbuf_queue.queue));
151 pxmitbuf++;
152 }
153 pxmitpriv->free_xmitbuf_cnt = NR_XMITBUFF;
154 INIT_WORK(&padapter->wkFilterRxFF0, r8712_SetFilter);
155 alloc_hwxmits(padapter);
156 init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
157 tasklet_init(&pxmitpriv->xmit_tasklet,
158 (void(*)(unsigned long))r8712_xmit_bh,
159 (unsigned long)padapter);
160 return _SUCCESS;
161 }
162
_free_xmit_priv(struct xmit_priv * pxmitpriv)163 void _free_xmit_priv(struct xmit_priv *pxmitpriv)
164 {
165 int i;
166 struct _adapter *padapter = pxmitpriv->adapter;
167 struct xmit_frame *pxmitframe = (struct xmit_frame *)
168 pxmitpriv->pxmit_frame_buf;
169 struct xmit_buf *pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
170
171 if (pxmitpriv->pxmit_frame_buf == NULL)
172 return;
173 for (i = 0; i < NR_XMITFRAME; i++) {
174 r8712_xmit_complete(padapter, pxmitframe);
175 pxmitframe++;
176 }
177 for (i = 0; i < NR_XMITBUFF; i++) {
178 r8712_xmit_resource_free(padapter, pxmitbuf);
179 kfree(pxmitbuf->pallocated_buf);
180 pxmitbuf++;
181 }
182 kfree(pxmitpriv->pallocated_frame_buf);
183 kfree(pxmitpriv->pallocated_xmitbuf);
184 free_hwxmits(padapter);
185 }
186
r8712_update_attrib(struct _adapter * padapter,_pkt * pkt,struct pkt_attrib * pattrib)187 sint r8712_update_attrib(struct _adapter *padapter, _pkt *pkt,
188 struct pkt_attrib *pattrib)
189 {
190 struct pkt_file pktfile;
191 struct sta_info *psta = NULL;
192 struct ethhdr etherhdr;
193
194 struct tx_cmd txdesc;
195
196 sint bmcast;
197 struct sta_priv *pstapriv = &padapter->stapriv;
198 struct security_priv *psecuritypriv = &padapter->securitypriv;
199 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
200 struct qos_priv *pqospriv = &pmlmepriv->qospriv;
201
202 _r8712_open_pktfile(pkt, &pktfile);
203
204 _r8712_pktfile_read(&pktfile, (unsigned char *)ðerhdr, ETH_HLEN);
205
206 pattrib->ether_type = ntohs(etherhdr.h_proto);
207
208 {
209 /*If driver xmit ARP packet, driver can set ps mode to initial
210 * setting. It stands for getting DHCP or fix IP.
211 */
212 if (pattrib->ether_type == 0x0806) {
213 if (padapter->pwrctrlpriv.pwr_mode !=
214 padapter->registrypriv.power_mgnt) {
215 del_timer_sync(&pmlmepriv->dhcp_timer);
216 r8712_set_ps_mode(padapter,
217 padapter->registrypriv.power_mgnt,
218 padapter->registrypriv.smart_ps);
219 }
220 }
221 }
222 memcpy(pattrib->dst, ðerhdr.h_dest, ETH_ALEN);
223 memcpy(pattrib->src, ðerhdr.h_source, ETH_ALEN);
224 pattrib->pctrl = 0;
225 if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
226 check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
227 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
228 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
229 } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
230 memcpy(pattrib->ra, get_bssid(pmlmepriv), ETH_ALEN);
231 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
232 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
233 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
234 memcpy(pattrib->ta, get_bssid(pmlmepriv), ETH_ALEN);
235 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
236 /*firstly, filter packet not belongs to mp*/
237 if (pattrib->ether_type != 0x8712)
238 return _FAIL;
239 /* for mp storing the txcmd per packet,
240 * according to the info of txcmd to update pattrib
241 */
242 /*get MP_TXDESC_SIZE bytes txcmd per packet*/
243 _r8712_pktfile_read(&pktfile, (u8 *)&txdesc, TXDESC_SIZE);
244 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
245 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
246 pattrib->pctrl = 1;
247 }
248 /* r8712_xmitframe_coalesce() overwrite this!*/
249 pattrib->pktlen = pktfile.pkt_len;
250 if (pattrib->ether_type == ETH_P_IP) {
251 /* The following is for DHCP and ARP packet, we use cck1M to
252 * tx these packets and let LPS awake some time
253 * to prevent DHCP protocol fail
254 */
255 u8 tmp[24];
256
257 _r8712_pktfile_read(&pktfile, &tmp[0], 24);
258 pattrib->dhcp_pkt = 0;
259 if (pktfile.pkt_len > 282) {/*MINIMUM_DHCP_PACKET_SIZE)*/
260 if (pattrib->ether_type == ETH_P_IP) {/* IP header*/
261 if (((tmp[21] == 68) && (tmp[23] == 67)) ||
262 ((tmp[21] == 67) && (tmp[23] == 68))) {
263 /* 68 : UDP BOOTP client
264 * 67 : UDP BOOTP server
265 * Use low rate to send DHCP packet.
266 */
267 pattrib->dhcp_pkt = 1;
268 }
269 }
270 }
271 }
272 bmcast = IS_MCAST(pattrib->ra);
273 /* get sta_info*/
274 if (bmcast) {
275 psta = r8712_get_bcmc_stainfo(padapter);
276 pattrib->mac_id = 4;
277 } else {
278 if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
279 psta = r8712_get_stainfo(pstapriv,
280 get_bssid(pmlmepriv));
281 pattrib->mac_id = 5;
282 } else {
283 psta = r8712_get_stainfo(pstapriv, pattrib->ra);
284 if (psta == NULL) /* drop the pkt */
285 return _FAIL;
286 if (check_fwstate(pmlmepriv, WIFI_STATION_STATE))
287 pattrib->mac_id = 5;
288 else
289 pattrib->mac_id = psta->mac_id;
290 }
291 }
292
293 if (psta) {
294 pattrib->psta = psta;
295 } else {
296 /* if we cannot get psta => drrp the pkt */
297 return _FAIL;
298 }
299
300 pattrib->ack_policy = 0;
301 /* get ether_hdr_len */
302 pattrib->pkt_hdrlen = ETH_HLEN;
303
304 if (pqospriv->qos_option) {
305 r8712_set_qos(&pktfile, pattrib);
306 } else {
307 pattrib->hdrlen = WLAN_HDR_A3_LEN;
308 pattrib->subtype = WIFI_DATA_TYPE;
309 pattrib->priority = 0;
310 }
311 if (psta->ieee8021x_blocked) {
312 pattrib->encrypt = 0;
313 if ((pattrib->ether_type != 0x888e) &&
314 !check_fwstate(pmlmepriv, WIFI_MP_STATE))
315 return _FAIL;
316 } else {
317 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, bmcast);
318 }
319 switch (pattrib->encrypt) {
320 case _WEP40_:
321 case _WEP104_:
322 pattrib->iv_len = 4;
323 pattrib->icv_len = 4;
324 break;
325 case _TKIP_:
326 pattrib->iv_len = 8;
327 pattrib->icv_len = 4;
328 if (padapter->securitypriv.busetkipkey == _FAIL)
329 return _FAIL;
330 break;
331 case _AES_:
332 pattrib->iv_len = 8;
333 pattrib->icv_len = 8;
334 break;
335 default:
336 pattrib->iv_len = 0;
337 pattrib->icv_len = 0;
338 break;
339 }
340
341 if (pattrib->encrypt &&
342 (padapter->securitypriv.sw_encrypt ||
343 !psecuritypriv->hw_decrypted))
344 pattrib->bswenc = true;
345 else
346 pattrib->bswenc = false;
347 /* if in MP_STATE, update pkt_attrib from mp_txcmd, and overwrite
348 * some settings above.
349 */
350 if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
351 pattrib->priority =
352 (le32_to_cpu(txdesc.txdw1) >> QSEL_SHT) & 0x1f;
353 return _SUCCESS;
354 }
355
xmitframe_addmic(struct _adapter * padapter,struct xmit_frame * pxmitframe)356 static sint xmitframe_addmic(struct _adapter *padapter,
357 struct xmit_frame *pxmitframe)
358 {
359 u32 curfragnum, length;
360 u8 *pframe, *payload, mic[8];
361 struct mic_data micdata;
362 struct sta_info *stainfo;
363 struct qos_priv *pqospriv = &(padapter->mlmepriv.qospriv);
364 struct pkt_attrib *pattrib = &pxmitframe->attrib;
365 struct security_priv *psecuritypriv = &padapter->securitypriv;
366 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
367 u8 priority[4] = {0x0, 0x0, 0x0, 0x0};
368 sint bmcst = IS_MCAST(pattrib->ra);
369
370 if (pattrib->psta)
371 stainfo = pattrib->psta;
372 else
373 stainfo = r8712_get_stainfo(&padapter->stapriv,
374 &pattrib->ra[0]);
375 if (pattrib->encrypt == _TKIP_) {
376 /*encode mic code*/
377 if (stainfo != NULL) {
378 u8 null_key[16] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
379 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
380 0x0, 0x0};
381 pframe = pxmitframe->buf_addr + TXDESC_OFFSET;
382 if (bmcst) {
383 if (!memcmp(psecuritypriv->XGrptxmickey
384 [psecuritypriv->XGrpKeyid].skey,
385 null_key, 16))
386 return _FAIL;
387 /*start to calculate the mic code*/
388 r8712_secmicsetkey(&micdata,
389 psecuritypriv->
390 XGrptxmickey[psecuritypriv->
391 XGrpKeyid].skey);
392 } else {
393 if (!memcmp(&stainfo->tkiptxmickey.skey[0],
394 null_key, 16))
395 return _FAIL;
396 /* start to calculate the mic code */
397 r8712_secmicsetkey(&micdata,
398 &stainfo->tkiptxmickey.skey[0]);
399 }
400 if (pframe[1] & 1) { /* ToDS==1 */
401 r8712_secmicappend(&micdata,
402 &pframe[16], 6); /*DA*/
403 if (pframe[1] & 2) /* From Ds==1 */
404 r8712_secmicappend(&micdata,
405 &pframe[24], 6);
406 else
407 r8712_secmicappend(&micdata,
408 &pframe[10], 6);
409 } else { /* ToDS==0 */
410 r8712_secmicappend(&micdata,
411 &pframe[4], 6); /* DA */
412 if (pframe[1] & 2) /* From Ds==1 */
413 r8712_secmicappend(&micdata,
414 &pframe[16], 6);
415 else
416 r8712_secmicappend(&micdata,
417 &pframe[10], 6);
418 }
419 if (pqospriv->qos_option == 1)
420 priority[0] = (u8)pxmitframe->attrib.priority;
421 r8712_secmicappend(&micdata, &priority[0], 4);
422 payload = pframe;
423 for (curfragnum = 0; curfragnum < pattrib->nr_frags;
424 curfragnum++) {
425 payload = (u8 *)RND4((addr_t)(payload));
426 payload += pattrib->hdrlen + pattrib->iv_len;
427 if ((curfragnum + 1) == pattrib->nr_frags) {
428 length = pattrib->last_txcmdsz -
429 pattrib->hdrlen -
430 pattrib->iv_len -
431 ((psecuritypriv->sw_encrypt)
432 ? pattrib->icv_len : 0);
433 r8712_secmicappend(&micdata, payload,
434 length);
435 payload = payload + length;
436 } else{
437 length = pxmitpriv->frag_len -
438 pattrib->hdrlen - pattrib->iv_len -
439 ((psecuritypriv->sw_encrypt) ?
440 pattrib->icv_len : 0);
441 r8712_secmicappend(&micdata, payload,
442 length);
443 payload = payload + length +
444 pattrib->icv_len;
445 }
446 }
447 r8712_secgetmic(&micdata, &(mic[0]));
448 /* add mic code and add the mic code length in
449 * last_txcmdsz
450 */
451 memcpy(payload, &(mic[0]), 8);
452 pattrib->last_txcmdsz += 8;
453 payload = payload - pattrib->last_txcmdsz + 8;
454 }
455 }
456 return _SUCCESS;
457 }
458
xmitframe_swencrypt(struct _adapter * padapter,struct xmit_frame * pxmitframe)459 static sint xmitframe_swencrypt(struct _adapter *padapter,
460 struct xmit_frame *pxmitframe)
461 {
462 struct pkt_attrib *pattrib = &pxmitframe->attrib;
463
464 if (pattrib->bswenc) {
465 switch (pattrib->encrypt) {
466 case _WEP40_:
467 case _WEP104_:
468 r8712_wep_encrypt(padapter, (u8 *)pxmitframe);
469 break;
470 case _TKIP_:
471 r8712_tkip_encrypt(padapter, (u8 *)pxmitframe);
472 break;
473 case _AES_:
474 r8712_aes_encrypt(padapter, (u8 *)pxmitframe);
475 break;
476 default:
477 break;
478 }
479 }
480 return _SUCCESS;
481 }
482
make_wlanhdr(struct _adapter * padapter,u8 * hdr,struct pkt_attrib * pattrib)483 static sint make_wlanhdr(struct _adapter *padapter, u8 *hdr,
484 struct pkt_attrib *pattrib)
485 {
486 u16 *qc;
487
488 struct ieee80211_hdr *pwlanhdr = (struct ieee80211_hdr *)hdr;
489 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
490 struct qos_priv *pqospriv = &pmlmepriv->qospriv;
491 __le16 *fctrl = &pwlanhdr->frame_ctl;
492
493 memset(hdr, 0, WLANHDR_OFFSET);
494 SetFrameSubType(fctrl, pattrib->subtype);
495 if (pattrib->subtype & WIFI_DATA_TYPE) {
496 if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
497 /* to_ds = 1, fr_ds = 0; */
498 SetToDs(fctrl);
499 memcpy(pwlanhdr->addr1, get_bssid(pmlmepriv),
500 ETH_ALEN);
501 memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
502 memcpy(pwlanhdr->addr3, pattrib->dst, ETH_ALEN);
503 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
504 /* to_ds = 0, fr_ds = 1; */
505 SetFrDs(fctrl);
506 memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
507 memcpy(pwlanhdr->addr2, get_bssid(pmlmepriv),
508 ETH_ALEN);
509 memcpy(pwlanhdr->addr3, pattrib->src, ETH_ALEN);
510 } else if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
511 check_fwstate(pmlmepriv,
512 WIFI_ADHOC_MASTER_STATE)) {
513 memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
514 memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
515 memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
516 ETH_ALEN);
517 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
518 memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
519 memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
520 memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
521 ETH_ALEN);
522 } else {
523 return _FAIL;
524 }
525
526 if (pattrib->encrypt)
527 SetPrivacy(fctrl);
528 if (pqospriv->qos_option) {
529 qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
530 if (pattrib->priority)
531 SetPriority(qc, pattrib->priority);
532 SetAckpolicy(qc, pattrib->ack_policy);
533 }
534 /* TODO: fill HT Control Field */
535 /* Update Seq Num will be handled by f/w */
536 {
537 struct sta_info *psta;
538 sint bmcst = IS_MCAST(pattrib->ra);
539
540 if (pattrib->psta) {
541 psta = pattrib->psta;
542 } else {
543 if (bmcst)
544 psta = r8712_get_bcmc_stainfo(padapter);
545 else
546 psta =
547 r8712_get_stainfo(&padapter->stapriv,
548 pattrib->ra);
549 }
550 if (psta) {
551 psta->sta_xmitpriv.txseq_tid
552 [pattrib->priority]++;
553 psta->sta_xmitpriv.txseq_tid[pattrib->priority]
554 &= 0xFFF;
555 pattrib->seqnum = psta->sta_xmitpriv.
556 txseq_tid[pattrib->priority];
557 SetSeqNum(hdr, pattrib->seqnum);
558 }
559 }
560 }
561 return _SUCCESS;
562 }
563
r8712_put_snap(u8 * data,u16 h_proto)564 static sint r8712_put_snap(u8 *data, u16 h_proto)
565 {
566 struct ieee80211_snap_hdr *snap;
567 const u8 *oui;
568
569 snap = (struct ieee80211_snap_hdr *)data;
570 snap->dsap = 0xaa;
571 snap->ssap = 0xaa;
572 snap->ctrl = 0x03;
573 if (h_proto == 0x8137 || h_proto == 0x80f3)
574 oui = P802_1H_OUI;
575 else
576 oui = RFC1042_OUI;
577 snap->oui[0] = oui[0];
578 snap->oui[1] = oui[1];
579 snap->oui[2] = oui[2];
580 *(__be16 *)(data + SNAP_SIZE) = htons(h_proto);
581 return SNAP_SIZE + sizeof(u16);
582 }
583
584 /*
585 * This sub-routine will perform all the following:
586 * 1. remove 802.3 header.
587 * 2. create wlan_header, based on the info in pxmitframe
588 * 3. append sta's iv/ext-iv
589 * 4. append LLC
590 * 5. move frag chunk from pframe to pxmitframe->mem
591 * 6. apply sw-encrypt, if necessary.
592 */
r8712_xmitframe_coalesce(struct _adapter * padapter,_pkt * pkt,struct xmit_frame * pxmitframe)593 sint r8712_xmitframe_coalesce(struct _adapter *padapter, _pkt *pkt,
594 struct xmit_frame *pxmitframe)
595 {
596 struct pkt_file pktfile;
597
598 sint frg_len, mpdu_len, llc_sz;
599 u32 mem_sz;
600 u8 frg_inx;
601 addr_t addr;
602 u8 *pframe, *mem_start, *ptxdesc;
603 struct sta_info *psta;
604 struct security_priv *psecuritypriv = &padapter->securitypriv;
605 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
606 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
607 struct pkt_attrib *pattrib = &pxmitframe->attrib;
608 u8 *pbuf_start;
609 sint bmcst = IS_MCAST(pattrib->ra);
610
611 if (pattrib->psta == NULL)
612 return _FAIL;
613 psta = pattrib->psta;
614 if (pxmitframe->buf_addr == NULL)
615 return _FAIL;
616 pbuf_start = pxmitframe->buf_addr;
617 ptxdesc = pbuf_start;
618 mem_start = pbuf_start + TXDESC_OFFSET;
619 if (make_wlanhdr(padapter, mem_start, pattrib) == _FAIL)
620 return _FAIL;
621 _r8712_open_pktfile(pkt, &pktfile);
622 _r8712_pktfile_read(&pktfile, NULL, (uint) pattrib->pkt_hdrlen);
623 if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
624 /* truncate TXDESC_SIZE bytes txcmd if at mp mode for 871x */
625 if (pattrib->ether_type == 0x8712) {
626 /* take care - update_txdesc overwrite this */
627 _r8712_pktfile_read(&pktfile, ptxdesc, TXDESC_SIZE);
628 }
629 }
630 pattrib->pktlen = pktfile.pkt_len;
631 frg_inx = 0;
632 frg_len = pxmitpriv->frag_len - 4;
633 while (1) {
634 llc_sz = 0;
635 mpdu_len = frg_len;
636 pframe = mem_start;
637 SetMFrag(mem_start);
638 pframe += pattrib->hdrlen;
639 mpdu_len -= pattrib->hdrlen;
640 /* adding icv, if necessary...*/
641 if (pattrib->iv_len) {
642 if (psta != NULL) {
643 switch (pattrib->encrypt) {
644 case _WEP40_:
645 case _WEP104_:
646 WEP_IV(pattrib->iv, psta->txpn,
647 (u8)psecuritypriv->
648 PrivacyKeyIndex);
649 break;
650 case _TKIP_:
651 if (bmcst)
652 TKIP_IV(pattrib->iv,
653 psta->txpn,
654 (u8)psecuritypriv->
655 XGrpKeyid);
656 else
657 TKIP_IV(pattrib->iv, psta->txpn,
658 0);
659 break;
660 case _AES_:
661 if (bmcst)
662 AES_IV(pattrib->iv, psta->txpn,
663 (u8)psecuritypriv->
664 XGrpKeyid);
665 else
666 AES_IV(pattrib->iv, psta->txpn,
667 0);
668 break;
669 }
670 }
671 memcpy(pframe, pattrib->iv, pattrib->iv_len);
672 pframe += pattrib->iv_len;
673 mpdu_len -= pattrib->iv_len;
674 }
675 if (frg_inx == 0) {
676 llc_sz = r8712_put_snap(pframe, pattrib->ether_type);
677 pframe += llc_sz;
678 mpdu_len -= llc_sz;
679 }
680 if ((pattrib->icv_len > 0) && (pattrib->bswenc))
681 mpdu_len -= pattrib->icv_len;
682 if (bmcst)
683 mem_sz = _r8712_pktfile_read(&pktfile, pframe,
684 pattrib->pktlen);
685 else
686 mem_sz = _r8712_pktfile_read(&pktfile, pframe,
687 mpdu_len);
688 pframe += mem_sz;
689 if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
690 memcpy(pframe, pattrib->icv, pattrib->icv_len);
691 pframe += pattrib->icv_len;
692 }
693 frg_inx++;
694 if (bmcst || r8712_endofpktfile(&pktfile)) {
695 pattrib->nr_frags = frg_inx;
696 pattrib->last_txcmdsz = pattrib->hdrlen +
697 pattrib->iv_len +
698 ((pattrib->nr_frags == 1) ?
699 llc_sz : 0) +
700 ((pattrib->bswenc) ?
701 pattrib->icv_len : 0) + mem_sz;
702 ClearMFrag(mem_start);
703 break;
704 }
705 addr = (addr_t)(pframe);
706 mem_start = (unsigned char *)RND4(addr) + TXDESC_OFFSET;
707 memcpy(mem_start, pbuf_start + TXDESC_OFFSET, pattrib->hdrlen);
708 }
709
710 if (xmitframe_addmic(padapter, pxmitframe) == _FAIL)
711 return _FAIL;
712 xmitframe_swencrypt(padapter, pxmitframe);
713 return _SUCCESS;
714 }
715
r8712_update_protection(struct _adapter * padapter,u8 * ie,uint ie_len)716 void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len)
717 {
718 uint protection;
719 u8 *perp;
720 uint erp_len;
721 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
722 struct registry_priv *pregistrypriv = &padapter->registrypriv;
723
724 switch (pxmitpriv->vcs_setting) {
725 case DISABLE_VCS:
726 pxmitpriv->vcs = NONE_VCS;
727 break;
728 case ENABLE_VCS:
729 break;
730 case AUTO_VCS:
731 default:
732 perp = r8712_get_ie(ie, _ERPINFO_IE_, &erp_len, ie_len);
733 if (perp == NULL) {
734 pxmitpriv->vcs = NONE_VCS;
735 } else {
736 protection = (*(perp + 2)) & BIT(1);
737 if (protection) {
738 if (pregistrypriv->vcs_type == RTS_CTS)
739 pxmitpriv->vcs = RTS_CTS;
740 else
741 pxmitpriv->vcs = CTS_TO_SELF;
742 } else {
743 pxmitpriv->vcs = NONE_VCS;
744 }
745 }
746 break;
747 }
748 }
749
r8712_alloc_xmitbuf(struct xmit_priv * pxmitpriv)750 struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
751 {
752 unsigned long irqL;
753 struct xmit_buf *pxmitbuf;
754 struct __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
755
756 spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
757 pxmitbuf = list_first_entry_or_null(&pfree_xmitbuf_queue->queue,
758 struct xmit_buf, list);
759 if (pxmitbuf) {
760 list_del_init(&pxmitbuf->list);
761 pxmitpriv->free_xmitbuf_cnt--;
762 }
763 spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
764 return pxmitbuf;
765 }
766
r8712_free_xmitbuf(struct xmit_priv * pxmitpriv,struct xmit_buf * pxmitbuf)767 int r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
768 {
769 unsigned long irqL;
770 struct __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
771
772 if (pxmitbuf == NULL)
773 return _FAIL;
774 spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
775 list_del_init(&pxmitbuf->list);
776 list_add_tail(&(pxmitbuf->list), &pfree_xmitbuf_queue->queue);
777 pxmitpriv->free_xmitbuf_cnt++;
778 spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
779 return _SUCCESS;
780 }
781
782 /*
783 * Calling context:
784 * 1. OS_TXENTRY
785 * 2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)
786 *
787 * If we turn on USE_RXTHREAD, then, no need for critical section.
788 * Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...
789 *
790 * Must be very very cautious...
791 *
792 */
r8712_alloc_xmitframe(struct xmit_priv * pxmitpriv)793 struct xmit_frame *r8712_alloc_xmitframe(struct xmit_priv *pxmitpriv)
794 {
795 /*
796 * Please remember to use all the osdep_service api,
797 * and lock/unlock or _enter/_exit critical to protect
798 * pfree_xmit_queue
799 */
800 unsigned long irqL;
801 struct xmit_frame *pxframe;
802 struct __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
803
804 spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
805 pxframe = list_first_entry_or_null(&pfree_xmit_queue->queue,
806 struct xmit_frame, list);
807 if (pxframe) {
808 list_del_init(&pxframe->list);
809 pxmitpriv->free_xmitframe_cnt--;
810 pxframe->buf_addr = NULL;
811 pxframe->pxmitbuf = NULL;
812 pxframe->attrib.psta = NULL;
813 pxframe->pkt = NULL;
814 }
815 spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
816 return pxframe;
817 }
818
r8712_free_xmitframe(struct xmit_priv * pxmitpriv,struct xmit_frame * pxmitframe)819 void r8712_free_xmitframe(struct xmit_priv *pxmitpriv,
820 struct xmit_frame *pxmitframe)
821 {
822 unsigned long irqL;
823 struct __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
824 struct _adapter *padapter = pxmitpriv->adapter;
825
826 if (pxmitframe == NULL)
827 return;
828 spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
829 list_del_init(&pxmitframe->list);
830 if (pxmitframe->pkt)
831 pxmitframe->pkt = NULL;
832 list_add_tail(&pxmitframe->list, &pfree_xmit_queue->queue);
833 pxmitpriv->free_xmitframe_cnt++;
834 spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
835 if (netif_queue_stopped(padapter->pnetdev))
836 netif_wake_queue(padapter->pnetdev);
837 }
838
r8712_free_xmitframe_ex(struct xmit_priv * pxmitpriv,struct xmit_frame * pxmitframe)839 void r8712_free_xmitframe_ex(struct xmit_priv *pxmitpriv,
840 struct xmit_frame *pxmitframe)
841 {
842 if (pxmitframe == NULL)
843 return;
844 if (pxmitframe->frame_tag == DATA_FRAMETAG)
845 r8712_free_xmitframe(pxmitpriv, pxmitframe);
846 }
847
r8712_free_xmitframe_queue(struct xmit_priv * pxmitpriv,struct __queue * pframequeue)848 void r8712_free_xmitframe_queue(struct xmit_priv *pxmitpriv,
849 struct __queue *pframequeue)
850 {
851 unsigned long irqL;
852 struct list_head *plist, *phead;
853 struct xmit_frame *pxmitframe;
854
855 spin_lock_irqsave(&(pframequeue->lock), irqL);
856 phead = &pframequeue->queue;
857 plist = phead->next;
858 while (!end_of_queue_search(phead, plist)) {
859 pxmitframe = container_of(plist, struct xmit_frame, list);
860 plist = plist->next;
861 r8712_free_xmitframe(pxmitpriv, pxmitframe);
862 }
863 spin_unlock_irqrestore(&(pframequeue->lock), irqL);
864 }
865
get_sta_pending(struct _adapter * padapter,struct __queue ** ppstapending,struct sta_info * psta,sint up)866 static inline struct tx_servq *get_sta_pending(struct _adapter *padapter,
867 struct __queue **ppstapending,
868 struct sta_info *psta, sint up)
869 {
870
871 struct tx_servq *ptxservq;
872 struct hw_xmit *phwxmits = padapter->xmitpriv.hwxmits;
873
874 switch (up) {
875 case 1:
876 case 2:
877 ptxservq = &(psta->sta_xmitpriv.bk_q);
878 *ppstapending = &padapter->xmitpriv.bk_pending;
879 (phwxmits + 3)->accnt++;
880 break;
881 case 4:
882 case 5:
883 ptxservq = &(psta->sta_xmitpriv.vi_q);
884 *ppstapending = &padapter->xmitpriv.vi_pending;
885 (phwxmits + 1)->accnt++;
886 break;
887 case 6:
888 case 7:
889 ptxservq = &(psta->sta_xmitpriv.vo_q);
890 *ppstapending = &padapter->xmitpriv.vo_pending;
891 (phwxmits + 0)->accnt++;
892 break;
893 case 0:
894 case 3:
895 default:
896 ptxservq = &(psta->sta_xmitpriv.be_q);
897 *ppstapending = &padapter->xmitpriv.be_pending;
898 (phwxmits + 2)->accnt++;
899 break;
900 }
901 return ptxservq;
902 }
903
904 /*
905 * Will enqueue pxmitframe to the proper queue, and indicate it
906 * to xx_pending list.....
907 */
r8712_xmit_classifier(struct _adapter * padapter,struct xmit_frame * pxmitframe)908 sint r8712_xmit_classifier(struct _adapter *padapter,
909 struct xmit_frame *pxmitframe)
910 {
911 unsigned long irqL0;
912 struct __queue *pstapending;
913 struct sta_info *psta;
914 struct tx_servq *ptxservq;
915 struct pkt_attrib *pattrib = &pxmitframe->attrib;
916 struct sta_priv *pstapriv = &padapter->stapriv;
917 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
918 sint bmcst = IS_MCAST(pattrib->ra);
919
920 if (pattrib->psta) {
921 psta = pattrib->psta;
922 } else {
923 if (bmcst) {
924 psta = r8712_get_bcmc_stainfo(padapter);
925 } else {
926 if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
927 psta = r8712_get_stainfo(pstapriv,
928 get_bssid(pmlmepriv));
929 else
930 psta = r8712_get_stainfo(pstapriv, pattrib->ra);
931 }
932 }
933 if (psta == NULL)
934 return _FAIL;
935 ptxservq = get_sta_pending(padapter, &pstapending,
936 psta, pattrib->priority);
937 spin_lock_irqsave(&pstapending->lock, irqL0);
938 if (list_empty(&ptxservq->tx_pending))
939 list_add_tail(&ptxservq->tx_pending, &pstapending->queue);
940 list_add_tail(&pxmitframe->list, &ptxservq->sta_pending.queue);
941 ptxservq->qcnt++;
942 spin_unlock_irqrestore(&pstapending->lock, irqL0);
943 return _SUCCESS;
944 }
945
alloc_hwxmits(struct _adapter * padapter)946 static void alloc_hwxmits(struct _adapter *padapter)
947 {
948 struct hw_xmit *hwxmits;
949 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
950
951 pxmitpriv->hwxmit_entry = HWXMIT_ENTRY;
952 pxmitpriv->hwxmits = kmalloc_array(pxmitpriv->hwxmit_entry,
953 sizeof(struct hw_xmit), GFP_ATOMIC);
954 if (!pxmitpriv->hwxmits)
955 return;
956 hwxmits = pxmitpriv->hwxmits;
957 if (pxmitpriv->hwxmit_entry == 5) {
958 pxmitpriv->bmc_txqueue.head = 0;
959 hwxmits[0] .phwtxqueue = &pxmitpriv->bmc_txqueue;
960 hwxmits[0] .sta_queue = &pxmitpriv->bm_pending;
961 pxmitpriv->vo_txqueue.head = 0;
962 hwxmits[1] .phwtxqueue = &pxmitpriv->vo_txqueue;
963 hwxmits[1] .sta_queue = &pxmitpriv->vo_pending;
964 pxmitpriv->vi_txqueue.head = 0;
965 hwxmits[2] .phwtxqueue = &pxmitpriv->vi_txqueue;
966 hwxmits[2] .sta_queue = &pxmitpriv->vi_pending;
967 pxmitpriv->bk_txqueue.head = 0;
968 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
969 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
970 pxmitpriv->be_txqueue.head = 0;
971 hwxmits[4] .phwtxqueue = &pxmitpriv->be_txqueue;
972 hwxmits[4] .sta_queue = &pxmitpriv->be_pending;
973 } else if (pxmitpriv->hwxmit_entry == 4) {
974 pxmitpriv->vo_txqueue.head = 0;
975 hwxmits[0] .phwtxqueue = &pxmitpriv->vo_txqueue;
976 hwxmits[0] .sta_queue = &pxmitpriv->vo_pending;
977 pxmitpriv->vi_txqueue.head = 0;
978 hwxmits[1] .phwtxqueue = &pxmitpriv->vi_txqueue;
979 hwxmits[1] .sta_queue = &pxmitpriv->vi_pending;
980 pxmitpriv->be_txqueue.head = 0;
981 hwxmits[2] .phwtxqueue = &pxmitpriv->be_txqueue;
982 hwxmits[2] .sta_queue = &pxmitpriv->be_pending;
983 pxmitpriv->bk_txqueue.head = 0;
984 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
985 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
986 }
987 }
988
free_hwxmits(struct _adapter * padapter)989 static void free_hwxmits(struct _adapter *padapter)
990 {
991 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
992
993 kfree(pxmitpriv->hwxmits);
994 }
995
init_hwxmits(struct hw_xmit * phwxmit,sint entry)996 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry)
997 {
998 sint i;
999
1000 for (i = 0; i < entry; i++, phwxmit++) {
1001 spin_lock_init(&phwxmit->xmit_lock);
1002 INIT_LIST_HEAD(&phwxmit->pending);
1003 phwxmit->txcmdcnt = 0;
1004 phwxmit->accnt = 0;
1005 }
1006 }
1007
xmitframe_xmitbuf_attach(struct xmit_frame * pxmitframe,struct xmit_buf * pxmitbuf)1008 void xmitframe_xmitbuf_attach(struct xmit_frame *pxmitframe,
1009 struct xmit_buf *pxmitbuf)
1010 {
1011 /* pxmitbuf attach to pxmitframe */
1012 pxmitframe->pxmitbuf = pxmitbuf;
1013 /* urb and irp connection */
1014 pxmitframe->pxmit_urb[0] = pxmitbuf->pxmit_urb[0];
1015 /* buffer addr assoc */
1016 pxmitframe->buf_addr = pxmitbuf->pbuf;
1017 /* pxmitframe attach to pxmitbuf */
1018 pxmitbuf->priv_data = pxmitframe;
1019 }
1020
1021 /*
1022 * tx_action == 0 == no frames to transmit
1023 * tx_action > 0 ==> we have frames to transmit
1024 * tx_action < 0 ==> we have frames to transmit, but TXFF is not even enough
1025 * to transmit 1 frame.
1026 */
1027
r8712_pre_xmit(struct _adapter * padapter,struct xmit_frame * pxmitframe)1028 int r8712_pre_xmit(struct _adapter *padapter, struct xmit_frame *pxmitframe)
1029 {
1030 unsigned long irqL;
1031 int ret;
1032 struct xmit_buf *pxmitbuf = NULL;
1033 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
1034 struct pkt_attrib *pattrib = &pxmitframe->attrib;
1035
1036 r8712_do_queue_select(padapter, pattrib);
1037 spin_lock_irqsave(&pxmitpriv->lock, irqL);
1038 if (r8712_txframes_sta_ac_pending(padapter, pattrib) > 0) {
1039 ret = false;
1040 r8712_xmit_enqueue(padapter, pxmitframe);
1041 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1042 return ret;
1043 }
1044 pxmitbuf = r8712_alloc_xmitbuf(pxmitpriv);
1045 if (pxmitbuf == NULL) { /*enqueue packet*/
1046 ret = false;
1047 r8712_xmit_enqueue(padapter, pxmitframe);
1048 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1049 } else { /*dump packet directly*/
1050 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1051 ret = true;
1052 xmitframe_xmitbuf_attach(pxmitframe, pxmitbuf);
1053 r8712_xmit_direct(padapter, pxmitframe);
1054 }
1055 return ret;
1056 }
1057
