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 == NULL) {
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 == NULL)
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 == NULL)
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 if (pattrib->ether_type == 0x0806) {
209 if (padapter->pwrctrlpriv.pwr_mode !=
210 padapter->registrypriv.power_mgnt) {
211 del_timer_sync(&pmlmepriv->dhcp_timer);
212 r8712_set_ps_mode(padapter, padapter->registrypriv.
213 power_mgnt, padapter->registrypriv.smart_ps);
214 }
215 }
216 }
217 memcpy(pattrib->dst, ðerhdr.h_dest, ETH_ALEN);
218 memcpy(pattrib->src, ðerhdr.h_source, ETH_ALEN);
219 pattrib->pctrl = 0;
220 if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
221 (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
222 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
223 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
224 } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
225 memcpy(pattrib->ra, get_bssid(pmlmepriv), ETH_ALEN);
226 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
227 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
228 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
229 memcpy(pattrib->ta, get_bssid(pmlmepriv), ETH_ALEN);
230 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
231 /*firstly, filter packet not belongs to mp*/
232 if (pattrib->ether_type != 0x8712)
233 return _FAIL;
234 /* for mp storing the txcmd per packet,
235 * according to the info of txcmd to update pattrib */
236 /*get MP_TXDESC_SIZE bytes txcmd per packet*/
237 _r8712_pktfile_read(&pktfile, (u8 *)&txdesc, TXDESC_SIZE);
238 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
239 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
240 pattrib->pctrl = 1;
241 }
242 /* r8712_xmitframe_coalesce() overwrite this!*/
243 pattrib->pktlen = pktfile.pkt_len;
244 if (ETH_P_IP == pattrib->ether_type) {
245 /* The following is for DHCP and ARP packet, we use cck1M to
246 * tx these packets and let LPS awake some time
247 * to prevent DHCP protocol fail */
248 u8 tmp[24];
249
250 _r8712_pktfile_read(&pktfile, &tmp[0], 24);
251 pattrib->dhcp_pkt = 0;
252 if (pktfile.pkt_len > 282) {/*MINIMUM_DHCP_PACKET_SIZE)*/
253 if (ETH_P_IP == pattrib->ether_type) {/* IP header*/
254 if (((tmp[21] == 68) && (tmp[23] == 67)) ||
255 ((tmp[21] == 67) && (tmp[23] == 68))) {
256 /* 68 : UDP BOOTP client
257 * 67 : UDP BOOTP server
258 * Use low rate to send DHCP packet.*/
259 pattrib->dhcp_pkt = 1;
260 }
261 }
262 }
263 }
264 bmcast = IS_MCAST(pattrib->ra);
265 /* get sta_info*/
266 if (bmcast) {
267 psta = r8712_get_bcmc_stainfo(padapter);
268 pattrib->mac_id = 4;
269 } else {
270 if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
271 psta = r8712_get_stainfo(pstapriv,
272 get_bssid(pmlmepriv));
273 pattrib->mac_id = 5;
274 } else {
275 psta = r8712_get_stainfo(pstapriv, pattrib->ra);
276 if (psta == NULL) /* drop the pkt */
277 return _FAIL;
278 if (check_fwstate(pmlmepriv, WIFI_STATION_STATE))
279 pattrib->mac_id = 5;
280 else
281 pattrib->mac_id = psta->mac_id;
282 }
283 }
284
285 if (psta) {
286 pattrib->psta = psta;
287 } else {
288 /* if we cannot get psta => drrp the pkt */
289 return _FAIL;
290 }
291
292 pattrib->ack_policy = 0;
293 /* get ether_hdr_len */
294 pattrib->pkt_hdrlen = ETH_HLEN;
295
296 if (pqospriv->qos_option)
297 r8712_set_qos(&pktfile, pattrib);
298 else {
299 pattrib->hdrlen = WLAN_HDR_A3_LEN;
300 pattrib->subtype = WIFI_DATA_TYPE;
301 pattrib->priority = 0;
302 }
303 if (psta->ieee8021x_blocked == true) {
304 pattrib->encrypt = 0;
305 if ((pattrib->ether_type != 0x888e) &&
306 (check_fwstate(pmlmepriv, WIFI_MP_STATE) == false))
307 return _FAIL;
308 } else
309 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, bmcast);
310 switch (pattrib->encrypt) {
311 case _WEP40_:
312 case _WEP104_:
313 pattrib->iv_len = 4;
314 pattrib->icv_len = 4;
315 break;
316 case _TKIP_:
317 pattrib->iv_len = 8;
318 pattrib->icv_len = 4;
319 if (padapter->securitypriv.busetkipkey == _FAIL)
320 return _FAIL;
321 break;
322 case _AES_:
323 pattrib->iv_len = 8;
324 pattrib->icv_len = 8;
325 break;
326 default:
327 pattrib->iv_len = 0;
328 pattrib->icv_len = 0;
329 break;
330 }
331
332 if (pattrib->encrypt &&
333 ((padapter->securitypriv.sw_encrypt == true) ||
334 (psecuritypriv->hw_decrypted == false)))
335 pattrib->bswenc = true;
336 else
337 pattrib->bswenc = false;
338 /* if in MP_STATE, update pkt_attrib from mp_txcmd, and overwrite
339 * some settings above.*/
340 if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)
341 pattrib->priority = (txdesc.txdw1 >> QSEL_SHT) & 0x1f;
342 return _SUCCESS;
343 }
344
xmitframe_addmic(struct _adapter * padapter,struct xmit_frame * pxmitframe)345 static sint xmitframe_addmic(struct _adapter *padapter,
346 struct xmit_frame *pxmitframe)
347 {
348 u32 curfragnum, length;
349 u8 *pframe, *payload, mic[8];
350 struct mic_data micdata;
351 struct sta_info *stainfo;
352 struct qos_priv *pqospriv = &(padapter->mlmepriv.qospriv);
353 struct pkt_attrib *pattrib = &pxmitframe->attrib;
354 struct security_priv *psecuritypriv = &padapter->securitypriv;
355 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
356 u8 priority[4] = {0x0, 0x0, 0x0, 0x0};
357 sint bmcst = IS_MCAST(pattrib->ra);
358
359 if (pattrib->psta)
360 stainfo = pattrib->psta;
361 else
362 stainfo = r8712_get_stainfo(&padapter->stapriv,
363 &pattrib->ra[0]);
364 if (pattrib->encrypt == _TKIP_) {
365 /*encode mic code*/
366 if (stainfo != NULL) {
367 u8 null_key[16] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
368 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
369 0x0, 0x0};
370 pframe = pxmitframe->buf_addr + TXDESC_OFFSET;
371 if (bmcst) {
372 if (!memcmp(psecuritypriv->XGrptxmickey
373 [psecuritypriv->XGrpKeyid].skey,
374 null_key, 16))
375 return _FAIL;
376 /*start to calculate the mic code*/
377 r8712_secmicsetkey(&micdata,
378 psecuritypriv->
379 XGrptxmickey[psecuritypriv->
380 XGrpKeyid].skey);
381 } else {
382 if (!memcmp(&stainfo->tkiptxmickey.skey[0],
383 null_key, 16))
384 return _FAIL;
385 /* start to calculate the mic code */
386 r8712_secmicsetkey(&micdata,
387 &stainfo->tkiptxmickey.skey[0]);
388 }
389 if (pframe[1] & 1) { /* ToDS==1 */
390 r8712_secmicappend(&micdata,
391 &pframe[16], 6); /*DA*/
392 if (pframe[1]&2) /* From Ds==1 */
393 r8712_secmicappend(&micdata,
394 &pframe[24], 6);
395 else
396 r8712_secmicappend(&micdata,
397 &pframe[10], 6);
398 } else { /* ToDS==0 */
399 r8712_secmicappend(&micdata,
400 &pframe[4], 6); /* DA */
401 if (pframe[1]&2) /* From Ds==1 */
402 r8712_secmicappend(&micdata,
403 &pframe[16], 6);
404 else
405 r8712_secmicappend(&micdata,
406 &pframe[10], 6);
407 }
408 if (pqospriv->qos_option == 1)
409 priority[0] = (u8)pxmitframe->
410 attrib.priority;
411 r8712_secmicappend(&micdata, &priority[0], 4);
412 payload = pframe;
413 for (curfragnum = 0; curfragnum < pattrib->nr_frags;
414 curfragnum++) {
415 payload = (u8 *)RND4((addr_t)(payload));
416 payload = payload+pattrib->
417 hdrlen+pattrib->iv_len;
418 if ((curfragnum + 1) == pattrib->nr_frags) {
419 length = pattrib->last_txcmdsz -
420 pattrib->hdrlen -
421 pattrib->iv_len -
422 ((psecuritypriv->sw_encrypt)
423 ? pattrib->icv_len : 0);
424 r8712_secmicappend(&micdata, payload,
425 length);
426 payload = payload+length;
427 } else{
428 length = pxmitpriv->frag_len -
429 pattrib->hdrlen-pattrib->iv_len -
430 ((psecuritypriv->sw_encrypt) ?
431 pattrib->icv_len : 0);
432 r8712_secmicappend(&micdata, payload,
433 length);
434 payload = payload + length +
435 pattrib->icv_len;
436 }
437 }
438 r8712_secgetmic(&micdata, &(mic[0]));
439 /* add mic code and add the mic code length in
440 * last_txcmdsz */
441 memcpy(payload, &(mic[0]), 8);
442 pattrib->last_txcmdsz += 8;
443 payload = payload-pattrib->last_txcmdsz + 8;
444 }
445 }
446 return _SUCCESS;
447 }
448
xmitframe_swencrypt(struct _adapter * padapter,struct xmit_frame * pxmitframe)449 static sint xmitframe_swencrypt(struct _adapter *padapter,
450 struct xmit_frame *pxmitframe)
451 {
452 struct pkt_attrib *pattrib = &pxmitframe->attrib;
453
454 if (pattrib->bswenc) {
455 switch (pattrib->encrypt) {
456 case _WEP40_:
457 case _WEP104_:
458 r8712_wep_encrypt(padapter, (u8 *)pxmitframe);
459 break;
460 case _TKIP_:
461 r8712_tkip_encrypt(padapter, (u8 *)pxmitframe);
462 break;
463 case _AES_:
464 r8712_aes_encrypt(padapter, (u8 *)pxmitframe);
465 break;
466 default:
467 break;
468 }
469 }
470 return _SUCCESS;
471 }
472
make_wlanhdr(struct _adapter * padapter,u8 * hdr,struct pkt_attrib * pattrib)473 static sint make_wlanhdr(struct _adapter *padapter, u8 *hdr,
474 struct pkt_attrib *pattrib)
475 {
476 u16 *qc;
477
478 struct ieee80211_hdr *pwlanhdr = (struct ieee80211_hdr *)hdr;
479 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
480 struct qos_priv *pqospriv = &pmlmepriv->qospriv;
481 u16 *fctrl = &pwlanhdr->frame_ctl;
482
483 memset(hdr, 0, WLANHDR_OFFSET);
484 SetFrameSubType(fctrl, pattrib->subtype);
485 if (pattrib->subtype & WIFI_DATA_TYPE) {
486 if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) {
487 /* to_ds = 1, fr_ds = 0; */
488 SetToDs(fctrl);
489 memcpy(pwlanhdr->addr1, get_bssid(pmlmepriv),
490 ETH_ALEN);
491 memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
492 memcpy(pwlanhdr->addr3, pattrib->dst, ETH_ALEN);
493 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
494 /* to_ds = 0, fr_ds = 1; */
495 SetFrDs(fctrl);
496 memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
497 memcpy(pwlanhdr->addr2, get_bssid(pmlmepriv),
498 ETH_ALEN);
499 memcpy(pwlanhdr->addr3, pattrib->src, ETH_ALEN);
500 } else if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true)
501 || (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)
502 == true)) {
503 memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
504 memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
505 memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
506 ETH_ALEN);
507 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
508 memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
509 memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
510 memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
511 ETH_ALEN);
512 } else
513 return _FAIL;
514
515 if (pattrib->encrypt)
516 SetPrivacy(fctrl);
517 if (pqospriv->qos_option) {
518 qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
519 if (pattrib->priority)
520 SetPriority(qc, pattrib->priority);
521 SetAckpolicy(qc, pattrib->ack_policy);
522 }
523 /* TODO: fill HT Control Field */
524 /* Update Seq Num will be handled by f/w */
525 {
526 struct sta_info *psta;
527 sint bmcst = IS_MCAST(pattrib->ra);
528
529 if (pattrib->psta)
530 psta = pattrib->psta;
531 else {
532 if (bmcst)
533 psta = r8712_get_bcmc_stainfo(padapter);
534 else
535 psta =
536 r8712_get_stainfo(&padapter->stapriv,
537 pattrib->ra);
538 }
539 if (psta) {
540 psta->sta_xmitpriv.txseq_tid
541 [pattrib->priority]++;
542 psta->sta_xmitpriv.txseq_tid[pattrib->priority]
543 &= 0xFFF;
544 pattrib->seqnum = psta->sta_xmitpriv.
545 txseq_tid[pattrib->priority];
546 SetSeqNum(hdr, pattrib->seqnum);
547 }
548 }
549 }
550 return _SUCCESS;
551 }
552
r8712_put_snap(u8 * data,u16 h_proto)553 static sint r8712_put_snap(u8 *data, u16 h_proto)
554 {
555 struct ieee80211_snap_hdr *snap;
556 const u8 *oui;
557
558 snap = (struct ieee80211_snap_hdr *)data;
559 snap->dsap = 0xaa;
560 snap->ssap = 0xaa;
561 snap->ctrl = 0x03;
562 if (h_proto == 0x8137 || h_proto == 0x80f3)
563 oui = P802_1H_OUI;
564 else
565 oui = RFC1042_OUI;
566 snap->oui[0] = oui[0];
567 snap->oui[1] = oui[1];
568 snap->oui[2] = oui[2];
569 *(u16 *)(data + SNAP_SIZE) = htons(h_proto);
570 return SNAP_SIZE + sizeof(u16);
571 }
572
573 /*
574 * This sub-routine will perform all the following:
575 * 1. remove 802.3 header.
576 * 2. create wlan_header, based on the info in pxmitframe
577 * 3. append sta's iv/ext-iv
578 * 4. append LLC
579 * 5. move frag chunk from pframe to pxmitframe->mem
580 * 6. apply sw-encrypt, if necessary.
581 */
r8712_xmitframe_coalesce(struct _adapter * padapter,_pkt * pkt,struct xmit_frame * pxmitframe)582 sint r8712_xmitframe_coalesce(struct _adapter *padapter, _pkt *pkt,
583 struct xmit_frame *pxmitframe)
584 {
585 struct pkt_file pktfile;
586
587 sint frg_len, mpdu_len, llc_sz;
588 u32 mem_sz;
589 u8 frg_inx;
590 addr_t addr;
591 u8 *pframe, *mem_start, *ptxdesc;
592 struct sta_info *psta;
593 struct security_priv *psecuritypriv = &padapter->securitypriv;
594 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
595 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
596 struct pkt_attrib *pattrib = &pxmitframe->attrib;
597 u8 *pbuf_start;
598 sint bmcst = IS_MCAST(pattrib->ra);
599
600 if (pattrib->psta == NULL)
601 return _FAIL;
602 psta = pattrib->psta;
603 if (pxmitframe->buf_addr == NULL)
604 return _FAIL;
605 pbuf_start = pxmitframe->buf_addr;
606 ptxdesc = pbuf_start;
607 mem_start = pbuf_start + TXDESC_OFFSET;
608 if (make_wlanhdr(padapter, mem_start, pattrib) == _FAIL)
609 return _FAIL;
610 _r8712_open_pktfile(pkt, &pktfile);
611 _r8712_pktfile_read(&pktfile, NULL, (uint) pattrib->pkt_hdrlen);
612 if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
613 /* truncate TXDESC_SIZE bytes txcmd if at mp mode for 871x */
614 if (pattrib->ether_type == 0x8712) {
615 /* take care - update_txdesc overwrite this */
616 _r8712_pktfile_read(&pktfile, ptxdesc, TXDESC_SIZE);
617 }
618 }
619 pattrib->pktlen = pktfile.pkt_len;
620 frg_inx = 0;
621 frg_len = pxmitpriv->frag_len - 4;
622 while (1) {
623 llc_sz = 0;
624 mpdu_len = frg_len;
625 pframe = mem_start;
626 SetMFrag(mem_start);
627 pframe += pattrib->hdrlen;
628 mpdu_len -= pattrib->hdrlen;
629 /* adding icv, if necessary...*/
630 if (pattrib->iv_len) {
631 if (psta != NULL) {
632 switch (pattrib->encrypt) {
633 case _WEP40_:
634 case _WEP104_:
635 WEP_IV(pattrib->iv, psta->txpn,
636 (u8)psecuritypriv->
637 PrivacyKeyIndex);
638 break;
639 case _TKIP_:
640 if (bmcst)
641 TKIP_IV(pattrib->iv,
642 psta->txpn,
643 (u8)psecuritypriv->
644 XGrpKeyid);
645 else
646 TKIP_IV(pattrib->iv, psta->txpn,
647 0);
648 break;
649 case _AES_:
650 if (bmcst)
651 AES_IV(pattrib->iv, psta->txpn,
652 (u8)psecuritypriv->
653 XGrpKeyid);
654 else
655 AES_IV(pattrib->iv, psta->txpn,
656 0);
657 break;
658 }
659 }
660 memcpy(pframe, pattrib->iv, pattrib->iv_len);
661 pframe += pattrib->iv_len;
662 mpdu_len -= pattrib->iv_len;
663 }
664 if (frg_inx == 0) {
665 llc_sz = r8712_put_snap(pframe, pattrib->ether_type);
666 pframe += llc_sz;
667 mpdu_len -= llc_sz;
668 }
669 if ((pattrib->icv_len > 0) && (pattrib->bswenc))
670 mpdu_len -= pattrib->icv_len;
671 if (bmcst)
672 mem_sz = _r8712_pktfile_read(&pktfile, pframe,
673 pattrib->pktlen);
674 else
675 mem_sz = _r8712_pktfile_read(&pktfile, pframe,
676 mpdu_len);
677 pframe += mem_sz;
678 if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
679 memcpy(pframe, pattrib->icv, pattrib->icv_len);
680 pframe += pattrib->icv_len;
681 }
682 frg_inx++;
683 if (bmcst || (r8712_endofpktfile(&pktfile) == true)) {
684 pattrib->nr_frags = frg_inx;
685 pattrib->last_txcmdsz = pattrib->hdrlen +
686 pattrib->iv_len +
687 ((pattrib->nr_frags == 1) ?
688 llc_sz : 0) +
689 ((pattrib->bswenc) ?
690 pattrib->icv_len : 0) + mem_sz;
691 ClearMFrag(mem_start);
692 break;
693 }
694 addr = (addr_t)(pframe);
695 mem_start = (unsigned char *)RND4(addr) + TXDESC_OFFSET;
696 memcpy(mem_start, pbuf_start + TXDESC_OFFSET, pattrib->hdrlen);
697 }
698
699 if (xmitframe_addmic(padapter, pxmitframe) == _FAIL)
700 return _FAIL;
701 xmitframe_swencrypt(padapter, pxmitframe);
702 return _SUCCESS;
703 }
704
r8712_update_protection(struct _adapter * padapter,u8 * ie,uint ie_len)705 void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len)
706 {
707 uint protection;
708 u8 *perp;
709 sint erp_len;
710 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
711 struct registry_priv *pregistrypriv = &padapter->registrypriv;
712
713 switch (pxmitpriv->vcs_setting) {
714 case DISABLE_VCS:
715 pxmitpriv->vcs = NONE_VCS;
716 break;
717 case ENABLE_VCS:
718 break;
719 case AUTO_VCS:
720 default:
721 perp = r8712_get_ie(ie, _ERPINFO_IE_, &erp_len, ie_len);
722 if (perp == NULL)
723 pxmitpriv->vcs = NONE_VCS;
724 else {
725 protection = (*(perp + 2)) & BIT(1);
726 if (protection) {
727 if (pregistrypriv->vcs_type == RTS_CTS)
728 pxmitpriv->vcs = RTS_CTS;
729 else
730 pxmitpriv->vcs = CTS_TO_SELF;
731 } else
732 pxmitpriv->vcs = NONE_VCS;
733 }
734 break;
735 }
736 }
737
r8712_alloc_xmitbuf(struct xmit_priv * pxmitpriv)738 struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
739 {
740 unsigned long irqL;
741 struct xmit_buf *pxmitbuf = NULL;
742 struct list_head *plist, *phead;
743 struct __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
744
745 spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
746 if (list_empty(&pfree_xmitbuf_queue->queue))
747 pxmitbuf = NULL;
748 else {
749 phead = &pfree_xmitbuf_queue->queue;
750 plist = phead->next;
751 pxmitbuf = LIST_CONTAINOR(plist, struct xmit_buf, list);
752 list_del_init(&(pxmitbuf->list));
753 }
754 if (pxmitbuf != NULL)
755 pxmitpriv->free_xmitbuf_cnt--;
756 spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
757 return pxmitbuf;
758 }
759
r8712_free_xmitbuf(struct xmit_priv * pxmitpriv,struct xmit_buf * pxmitbuf)760 int r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
761 {
762 unsigned long irqL;
763 struct __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
764
765 if (pxmitbuf == NULL)
766 return _FAIL;
767 spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
768 list_del_init(&pxmitbuf->list);
769 list_add_tail(&(pxmitbuf->list), &pfree_xmitbuf_queue->queue);
770 pxmitpriv->free_xmitbuf_cnt++;
771 spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
772 return _SUCCESS;
773 }
774
775 /*
776 Calling context:
777 1. OS_TXENTRY
778 2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)
779
780 If we turn on USE_RXTHREAD, then, no need for critical section.
781 Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...
782
783 Must be very very cautious...
784
785 */
786
r8712_alloc_xmitframe(struct xmit_priv * pxmitpriv)787 struct xmit_frame *r8712_alloc_xmitframe(struct xmit_priv *pxmitpriv)
788 {
789 /*
790 Please remember to use all the osdep_service api,
791 and lock/unlock or _enter/_exit critical to protect
792 pfree_xmit_queue
793 */
794 unsigned long irqL;
795 struct xmit_frame *pxframe = NULL;
796 struct list_head *plist, *phead;
797 struct __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
798
799 spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
800 if (list_empty(&pfree_xmit_queue->queue))
801 pxframe = NULL;
802 else {
803 phead = &pfree_xmit_queue->queue;
804 plist = phead->next;
805 pxframe = LIST_CONTAINOR(plist, struct xmit_frame, list);
806 list_del_init(&(pxframe->list));
807 }
808 if (pxframe != NULL) {
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) == false) {
859 pxmitframe = LIST_CONTAINOR(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) == true)
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 == NULL)
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