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