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[mirror_ubuntu-artful-kernel.git] / drivers / staging / rtl8712 / rtl871x_xmit.c
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
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
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
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
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
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 *)&etherhdr, 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, &etherhdr.h_dest, ETH_ALEN);
218 memcpy(pattrib->src, &etherhdr.h_source, ETH_ALEN);
219 pattrib->pctrl = 0;
220 if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
221 check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
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)) {
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)) {
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) {
304 pattrib->encrypt = 0;
305 if ((pattrib->ether_type != 0x888e) &&
306 !check_fwstate(pmlmepriv, WIFI_MP_STATE))
307 return _FAIL;
308 } else {
309 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, bmcast);
310 }
311 switch (pattrib->encrypt) {
312 case _WEP40_:
313 case _WEP104_:
314 pattrib->iv_len = 4;
315 pattrib->icv_len = 4;
316 break;
317 case _TKIP_:
318 pattrib->iv_len = 8;
319 pattrib->icv_len = 4;
320 if (padapter->securitypriv.busetkipkey == _FAIL)
321 return _FAIL;
322 break;
323 case _AES_:
324 pattrib->iv_len = 8;
325 pattrib->icv_len = 8;
326 break;
327 default:
328 pattrib->iv_len = 0;
329 pattrib->icv_len = 0;
330 break;
331 }
332
333 if (pattrib->encrypt &&
334 (padapter->securitypriv.sw_encrypt ||
335 !psecuritypriv->hw_decrypted))
336 pattrib->bswenc = true;
337 else
338 pattrib->bswenc = false;
339 /* if in MP_STATE, update pkt_attrib from mp_txcmd, and overwrite
340 * some settings above.*/
341 if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
342 pattrib->priority = (txdesc.txdw1 >> QSEL_SHT) & 0x1f;
343 return _SUCCESS;
344 }
345
346 static sint xmitframe_addmic(struct _adapter *padapter,
347 struct xmit_frame *pxmitframe)
348 {
349 u32 curfragnum, length;
350 u8 *pframe, *payload, mic[8];
351 struct mic_data micdata;
352 struct sta_info *stainfo;
353 struct qos_priv *pqospriv = &(padapter->mlmepriv.qospriv);
354 struct pkt_attrib *pattrib = &pxmitframe->attrib;
355 struct security_priv *psecuritypriv = &padapter->securitypriv;
356 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
357 u8 priority[4] = {0x0, 0x0, 0x0, 0x0};
358 sint bmcst = IS_MCAST(pattrib->ra);
359
360 if (pattrib->psta)
361 stainfo = pattrib->psta;
362 else
363 stainfo = r8712_get_stainfo(&padapter->stapriv,
364 &pattrib->ra[0]);
365 if (pattrib->encrypt == _TKIP_) {
366 /*encode mic code*/
367 if (stainfo != NULL) {
368 u8 null_key[16] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
369 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
370 0x0, 0x0};
371 pframe = pxmitframe->buf_addr + TXDESC_OFFSET;
372 if (bmcst) {
373 if (!memcmp(psecuritypriv->XGrptxmickey
374 [psecuritypriv->XGrpKeyid].skey,
375 null_key, 16))
376 return _FAIL;
377 /*start to calculate the mic code*/
378 r8712_secmicsetkey(&micdata,
379 psecuritypriv->
380 XGrptxmickey[psecuritypriv->
381 XGrpKeyid].skey);
382 } else {
383 if (!memcmp(&stainfo->tkiptxmickey.skey[0],
384 null_key, 16))
385 return _FAIL;
386 /* start to calculate the mic code */
387 r8712_secmicsetkey(&micdata,
388 &stainfo->tkiptxmickey.skey[0]);
389 }
390 if (pframe[1] & 1) { /* ToDS==1 */
391 r8712_secmicappend(&micdata,
392 &pframe[16], 6); /*DA*/
393 if (pframe[1] & 2) /* From Ds==1 */
394 r8712_secmicappend(&micdata,
395 &pframe[24], 6);
396 else
397 r8712_secmicappend(&micdata,
398 &pframe[10], 6);
399 } else { /* ToDS==0 */
400 r8712_secmicappend(&micdata,
401 &pframe[4], 6); /* DA */
402 if (pframe[1] & 2) /* From Ds==1 */
403 r8712_secmicappend(&micdata,
404 &pframe[16], 6);
405 else
406 r8712_secmicappend(&micdata,
407 &pframe[10], 6);
408 }
409 if (pqospriv->qos_option == 1)
410 priority[0] = (u8)pxmitframe->
411 attrib.priority;
412 r8712_secmicappend(&micdata, &priority[0], 4);
413 payload = pframe;
414 for (curfragnum = 0; curfragnum < pattrib->nr_frags;
415 curfragnum++) {
416 payload = (u8 *)RND4((addr_t)(payload));
417 payload = payload + pattrib->
418 hdrlen + pattrib->iv_len;
419 if ((curfragnum + 1) == pattrib->nr_frags) {
420 length = pattrib->last_txcmdsz -
421 pattrib->hdrlen -
422 pattrib->iv_len -
423 ((psecuritypriv->sw_encrypt)
424 ? pattrib->icv_len : 0);
425 r8712_secmicappend(&micdata, payload,
426 length);
427 payload = payload + length;
428 } else{
429 length = pxmitpriv->frag_len -
430 pattrib->hdrlen - pattrib->iv_len -
431 ((psecuritypriv->sw_encrypt) ?
432 pattrib->icv_len : 0);
433 r8712_secmicappend(&micdata, payload,
434 length);
435 payload = payload + length +
436 pattrib->icv_len;
437 }
438 }
439 r8712_secgetmic(&micdata, &(mic[0]));
440 /* add mic code and add the mic code length in
441 * last_txcmdsz */
442 memcpy(payload, &(mic[0]), 8);
443 pattrib->last_txcmdsz += 8;
444 payload = payload - pattrib->last_txcmdsz + 8;
445 }
446 }
447 return _SUCCESS;
448 }
449
450 static sint xmitframe_swencrypt(struct _adapter *padapter,
451 struct xmit_frame *pxmitframe)
452 {
453 struct pkt_attrib *pattrib = &pxmitframe->attrib;
454
455 if (pattrib->bswenc) {
456 switch (pattrib->encrypt) {
457 case _WEP40_:
458 case _WEP104_:
459 r8712_wep_encrypt(padapter, (u8 *)pxmitframe);
460 break;
461 case _TKIP_:
462 r8712_tkip_encrypt(padapter, (u8 *)pxmitframe);
463 break;
464 case _AES_:
465 r8712_aes_encrypt(padapter, (u8 *)pxmitframe);
466 break;
467 default:
468 break;
469 }
470 }
471 return _SUCCESS;
472 }
473
474 static sint make_wlanhdr(struct _adapter *padapter, u8 *hdr,
475 struct pkt_attrib *pattrib)
476 {
477 u16 *qc;
478
479 struct ieee80211_hdr *pwlanhdr = (struct ieee80211_hdr *)hdr;
480 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
481 struct qos_priv *pqospriv = &pmlmepriv->qospriv;
482 u16 *fctrl = &pwlanhdr->frame_ctl;
483
484 memset(hdr, 0, WLANHDR_OFFSET);
485 SetFrameSubType(fctrl, pattrib->subtype);
486 if (pattrib->subtype & WIFI_DATA_TYPE) {
487 if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
488 /* to_ds = 1, fr_ds = 0; */
489 SetToDs(fctrl);
490 memcpy(pwlanhdr->addr1, get_bssid(pmlmepriv),
491 ETH_ALEN);
492 memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
493 memcpy(pwlanhdr->addr3, pattrib->dst, ETH_ALEN);
494 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
495 /* to_ds = 0, fr_ds = 1; */
496 SetFrDs(fctrl);
497 memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
498 memcpy(pwlanhdr->addr2, get_bssid(pmlmepriv),
499 ETH_ALEN);
500 memcpy(pwlanhdr->addr3, pattrib->src, ETH_ALEN);
501 } else if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
502 check_fwstate(pmlmepriv,
503 WIFI_ADHOC_MASTER_STATE)) {
504 memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
505 memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
506 memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
507 ETH_ALEN);
508 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
509 memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
510 memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
511 memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv),
512 ETH_ALEN);
513 } else {
514 return _FAIL;
515 }
516
517 if (pattrib->encrypt)
518 SetPrivacy(fctrl);
519 if (pqospriv->qos_option) {
520 qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
521 if (pattrib->priority)
522 SetPriority(qc, pattrib->priority);
523 SetAckpolicy(qc, pattrib->ack_policy);
524 }
525 /* TODO: fill HT Control Field */
526 /* Update Seq Num will be handled by f/w */
527 {
528 struct sta_info *psta;
529 sint bmcst = IS_MCAST(pattrib->ra);
530
531 if (pattrib->psta) {
532 psta = pattrib->psta;
533 } else {
534 if (bmcst)
535 psta = r8712_get_bcmc_stainfo(padapter);
536 else
537 psta =
538 r8712_get_stainfo(&padapter->stapriv,
539 pattrib->ra);
540 }
541 if (psta) {
542 psta->sta_xmitpriv.txseq_tid
543 [pattrib->priority]++;
544 psta->sta_xmitpriv.txseq_tid[pattrib->priority]
545 &= 0xFFF;
546 pattrib->seqnum = psta->sta_xmitpriv.
547 txseq_tid[pattrib->priority];
548 SetSeqNum(hdr, pattrib->seqnum);
549 }
550 }
551 }
552 return _SUCCESS;
553 }
554
555 static sint r8712_put_snap(u8 *data, u16 h_proto)
556 {
557 struct ieee80211_snap_hdr *snap;
558 const u8 *oui;
559
560 snap = (struct ieee80211_snap_hdr *)data;
561 snap->dsap = 0xaa;
562 snap->ssap = 0xaa;
563 snap->ctrl = 0x03;
564 if (h_proto == 0x8137 || h_proto == 0x80f3)
565 oui = P802_1H_OUI;
566 else
567 oui = RFC1042_OUI;
568 snap->oui[0] = oui[0];
569 snap->oui[1] = oui[1];
570 snap->oui[2] = oui[2];
571 *(u16 *)(data + SNAP_SIZE) = htons(h_proto);
572 return SNAP_SIZE + sizeof(u16);
573 }
574
575 /*
576 * This sub-routine will perform all the following:
577 * 1. remove 802.3 header.
578 * 2. create wlan_header, based on the info in pxmitframe
579 * 3. append sta's iv/ext-iv
580 * 4. append LLC
581 * 5. move frag chunk from pframe to pxmitframe->mem
582 * 6. apply sw-encrypt, if necessary.
583 */
584 sint r8712_xmitframe_coalesce(struct _adapter *padapter, _pkt *pkt,
585 struct xmit_frame *pxmitframe)
586 {
587 struct pkt_file pktfile;
588
589 sint frg_len, mpdu_len, llc_sz;
590 u32 mem_sz;
591 u8 frg_inx;
592 addr_t addr;
593 u8 *pframe, *mem_start, *ptxdesc;
594 struct sta_info *psta;
595 struct security_priv *psecuritypriv = &padapter->securitypriv;
596 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
597 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
598 struct pkt_attrib *pattrib = &pxmitframe->attrib;
599 u8 *pbuf_start;
600 sint bmcst = IS_MCAST(pattrib->ra);
601
602 if (pattrib->psta == NULL)
603 return _FAIL;
604 psta = pattrib->psta;
605 if (pxmitframe->buf_addr == NULL)
606 return _FAIL;
607 pbuf_start = pxmitframe->buf_addr;
608 ptxdesc = pbuf_start;
609 mem_start = pbuf_start + TXDESC_OFFSET;
610 if (make_wlanhdr(padapter, mem_start, pattrib) == _FAIL)
611 return _FAIL;
612 _r8712_open_pktfile(pkt, &pktfile);
613 _r8712_pktfile_read(&pktfile, NULL, (uint) pattrib->pkt_hdrlen);
614 if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
615 /* truncate TXDESC_SIZE bytes txcmd if at mp mode for 871x */
616 if (pattrib->ether_type == 0x8712) {
617 /* take care - update_txdesc overwrite this */
618 _r8712_pktfile_read(&pktfile, ptxdesc, TXDESC_SIZE);
619 }
620 }
621 pattrib->pktlen = pktfile.pkt_len;
622 frg_inx = 0;
623 frg_len = pxmitpriv->frag_len - 4;
624 while (1) {
625 llc_sz = 0;
626 mpdu_len = frg_len;
627 pframe = mem_start;
628 SetMFrag(mem_start);
629 pframe += pattrib->hdrlen;
630 mpdu_len -= pattrib->hdrlen;
631 /* adding icv, if necessary...*/
632 if (pattrib->iv_len) {
633 if (psta != NULL) {
634 switch (pattrib->encrypt) {
635 case _WEP40_:
636 case _WEP104_:
637 WEP_IV(pattrib->iv, psta->txpn,
638 (u8)psecuritypriv->
639 PrivacyKeyIndex);
640 break;
641 case _TKIP_:
642 if (bmcst)
643 TKIP_IV(pattrib->iv,
644 psta->txpn,
645 (u8)psecuritypriv->
646 XGrpKeyid);
647 else
648 TKIP_IV(pattrib->iv, psta->txpn,
649 0);
650 break;
651 case _AES_:
652 if (bmcst)
653 AES_IV(pattrib->iv, psta->txpn,
654 (u8)psecuritypriv->
655 XGrpKeyid);
656 else
657 AES_IV(pattrib->iv, psta->txpn,
658 0);
659 break;
660 }
661 }
662 memcpy(pframe, pattrib->iv, pattrib->iv_len);
663 pframe += pattrib->iv_len;
664 mpdu_len -= pattrib->iv_len;
665 }
666 if (frg_inx == 0) {
667 llc_sz = r8712_put_snap(pframe, pattrib->ether_type);
668 pframe += llc_sz;
669 mpdu_len -= llc_sz;
670 }
671 if ((pattrib->icv_len > 0) && (pattrib->bswenc))
672 mpdu_len -= pattrib->icv_len;
673 if (bmcst)
674 mem_sz = _r8712_pktfile_read(&pktfile, pframe,
675 pattrib->pktlen);
676 else
677 mem_sz = _r8712_pktfile_read(&pktfile, pframe,
678 mpdu_len);
679 pframe += mem_sz;
680 if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
681 memcpy(pframe, pattrib->icv, pattrib->icv_len);
682 pframe += pattrib->icv_len;
683 }
684 frg_inx++;
685 if (bmcst || r8712_endofpktfile(&pktfile)) {
686 pattrib->nr_frags = frg_inx;
687 pattrib->last_txcmdsz = pattrib->hdrlen +
688 pattrib->iv_len +
689 ((pattrib->nr_frags == 1) ?
690 llc_sz : 0) +
691 ((pattrib->bswenc) ?
692 pattrib->icv_len : 0) + mem_sz;
693 ClearMFrag(mem_start);
694 break;
695 }
696 addr = (addr_t)(pframe);
697 mem_start = (unsigned char *)RND4(addr) + TXDESC_OFFSET;
698 memcpy(mem_start, pbuf_start + TXDESC_OFFSET, pattrib->hdrlen);
699 }
700
701 if (xmitframe_addmic(padapter, pxmitframe) == _FAIL)
702 return _FAIL;
703 xmitframe_swencrypt(padapter, pxmitframe);
704 return _SUCCESS;
705 }
706
707 void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len)
708 {
709 uint protection;
710 u8 *perp;
711 sint erp_len;
712 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
713 struct registry_priv *pregistrypriv = &padapter->registrypriv;
714
715 switch (pxmitpriv->vcs_setting) {
716 case DISABLE_VCS:
717 pxmitpriv->vcs = NONE_VCS;
718 break;
719 case ENABLE_VCS:
720 break;
721 case AUTO_VCS:
722 default:
723 perp = r8712_get_ie(ie, _ERPINFO_IE_, &erp_len, ie_len);
724 if (perp == NULL) {
725 pxmitpriv->vcs = NONE_VCS;
726 } else {
727 protection = (*(perp + 2)) & BIT(1);
728 if (protection) {
729 if (pregistrypriv->vcs_type == RTS_CTS)
730 pxmitpriv->vcs = RTS_CTS;
731 else
732 pxmitpriv->vcs = CTS_TO_SELF;
733 } else {
734 pxmitpriv->vcs = NONE_VCS;
735 }
736 }
737 break;
738 }
739 }
740
741 struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
742 {
743 unsigned long irqL;
744 struct xmit_buf *pxmitbuf = NULL;
745 struct list_head *plist, *phead;
746 struct __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
747
748 spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
749 if (list_empty(&pfree_xmitbuf_queue->queue)) {
750 pxmitbuf = NULL;
751 } else {
752 phead = &pfree_xmitbuf_queue->queue;
753 plist = phead->next;
754 pxmitbuf = LIST_CONTAINOR(plist, struct xmit_buf, list);
755 list_del_init(&(pxmitbuf->list));
756 }
757 if (pxmitbuf != NULL)
758 pxmitpriv->free_xmitbuf_cnt--;
759 spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
760 return pxmitbuf;
761 }
762
763 int r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
764 {
765 unsigned long irqL;
766 struct __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
767
768 if (pxmitbuf == NULL)
769 return _FAIL;
770 spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
771 list_del_init(&pxmitbuf->list);
772 list_add_tail(&(pxmitbuf->list), &pfree_xmitbuf_queue->queue);
773 pxmitpriv->free_xmitbuf_cnt++;
774 spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
775 return _SUCCESS;
776 }
777
778 /*
779 Calling context:
780 1. OS_TXENTRY
781 2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)
782
783 If we turn on USE_RXTHREAD, then, no need for critical section.
784 Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...
785
786 Must be very very cautious...
787
788 */
789
790 struct xmit_frame *r8712_alloc_xmitframe(struct xmit_priv *pxmitpriv)
791 {
792 /*
793 Please remember to use all the osdep_service api,
794 and lock/unlock or _enter/_exit critical to protect
795 pfree_xmit_queue
796 */
797 unsigned long irqL;
798 struct xmit_frame *pxframe = NULL;
799 struct list_head *plist, *phead;
800 struct __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
801
802 spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
803 if (list_empty(&pfree_xmit_queue->queue)) {
804 pxframe = NULL;
805 } else {
806 phead = &pfree_xmit_queue->queue;
807 plist = phead->next;
808 pxframe = LIST_CONTAINOR(plist, struct xmit_frame, list);
809 list_del_init(&(pxframe->list));
810 }
811 if (pxframe != NULL) {
812 pxmitpriv->free_xmitframe_cnt--;
813 pxframe->buf_addr = NULL;
814 pxframe->pxmitbuf = NULL;
815 pxframe->attrib.psta = NULL;
816 pxframe->pkt = NULL;
817 }
818 spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
819 return pxframe;
820 }
821
822 void r8712_free_xmitframe(struct xmit_priv *pxmitpriv,
823 struct xmit_frame *pxmitframe)
824 {
825 unsigned long irqL;
826 struct __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
827 struct _adapter *padapter = pxmitpriv->adapter;
828
829 if (pxmitframe == NULL)
830 return;
831 spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
832 list_del_init(&pxmitframe->list);
833 if (pxmitframe->pkt)
834 pxmitframe->pkt = NULL;
835 list_add_tail(&pxmitframe->list, &pfree_xmit_queue->queue);
836 pxmitpriv->free_xmitframe_cnt++;
837 spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
838 if (netif_queue_stopped(padapter->pnetdev))
839 netif_wake_queue(padapter->pnetdev);
840 }
841
842 void r8712_free_xmitframe_ex(struct xmit_priv *pxmitpriv,
843 struct xmit_frame *pxmitframe)
844 {
845 if (pxmitframe == NULL)
846 return;
847 if (pxmitframe->frame_tag == DATA_FRAMETAG)
848 r8712_free_xmitframe(pxmitpriv, pxmitframe);
849 }
850
851 void r8712_free_xmitframe_queue(struct xmit_priv *pxmitpriv,
852 struct __queue *pframequeue)
853 {
854 unsigned long irqL;
855 struct list_head *plist, *phead;
856 struct xmit_frame *pxmitframe;
857
858 spin_lock_irqsave(&(pframequeue->lock), irqL);
859 phead = &pframequeue->queue;
860 plist = phead->next;
861 while (!end_of_queue_search(phead, plist)) {
862 pxmitframe = LIST_CONTAINOR(plist, struct xmit_frame, list);
863 plist = plist->next;
864 r8712_free_xmitframe(pxmitpriv, pxmitframe);
865 }
866 spin_unlock_irqrestore(&(pframequeue->lock), irqL);
867 }
868
869 static inline struct tx_servq *get_sta_pending(struct _adapter *padapter,
870 struct __queue **ppstapending,
871 struct sta_info *psta, sint up)
872 {
873
874 struct tx_servq *ptxservq;
875 struct hw_xmit *phwxmits = padapter->xmitpriv.hwxmits;
876
877 switch (up) {
878 case 1:
879 case 2:
880 ptxservq = &(psta->sta_xmitpriv.bk_q);
881 *ppstapending = &padapter->xmitpriv.bk_pending;
882 (phwxmits + 3)->accnt++;
883 break;
884 case 4:
885 case 5:
886 ptxservq = &(psta->sta_xmitpriv.vi_q);
887 *ppstapending = &padapter->xmitpriv.vi_pending;
888 (phwxmits + 1)->accnt++;
889 break;
890 case 6:
891 case 7:
892 ptxservq = &(psta->sta_xmitpriv.vo_q);
893 *ppstapending = &padapter->xmitpriv.vo_pending;
894 (phwxmits + 0)->accnt++;
895 break;
896 case 0:
897 case 3:
898 default:
899 ptxservq = &(psta->sta_xmitpriv.be_q);
900 *ppstapending = &padapter->xmitpriv.be_pending;
901 (phwxmits + 2)->accnt++;
902 break;
903 }
904 return ptxservq;
905 }
906
907 /*
908 * Will enqueue pxmitframe to the proper queue, and indicate it
909 * to xx_pending list.....
910 */
911 sint r8712_xmit_classifier(struct _adapter *padapter,
912 struct xmit_frame *pxmitframe)
913 {
914 unsigned long irqL0;
915 struct __queue *pstapending;
916 struct sta_info *psta;
917 struct tx_servq *ptxservq;
918 struct pkt_attrib *pattrib = &pxmitframe->attrib;
919 struct sta_priv *pstapriv = &padapter->stapriv;
920 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
921 sint bmcst = IS_MCAST(pattrib->ra);
922
923 if (pattrib->psta) {
924 psta = pattrib->psta;
925 } else {
926 if (bmcst) {
927 psta = r8712_get_bcmc_stainfo(padapter);
928 } else {
929 if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
930 psta = r8712_get_stainfo(pstapriv,
931 get_bssid(pmlmepriv));
932 else
933 psta = r8712_get_stainfo(pstapriv, pattrib->ra);
934 }
935 }
936 if (psta == NULL)
937 return _FAIL;
938 ptxservq = get_sta_pending(padapter, &pstapending,
939 psta, pattrib->priority);
940 spin_lock_irqsave(&pstapending->lock, irqL0);
941 if (list_empty(&ptxservq->tx_pending))
942 list_add_tail(&ptxservq->tx_pending, &pstapending->queue);
943 list_add_tail(&pxmitframe->list, &ptxservq->sta_pending.queue);
944 ptxservq->qcnt++;
945 spin_unlock_irqrestore(&pstapending->lock, irqL0);
946 return _SUCCESS;
947 }
948
949 static void alloc_hwxmits(struct _adapter *padapter)
950 {
951 struct hw_xmit *hwxmits;
952 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
953
954 pxmitpriv->hwxmit_entry = HWXMIT_ENTRY;
955 pxmitpriv->hwxmits = kmalloc_array(pxmitpriv->hwxmit_entry,
956 sizeof(struct hw_xmit), GFP_ATOMIC);
957 if (pxmitpriv->hwxmits == NULL)
958 return;
959 hwxmits = pxmitpriv->hwxmits;
960 if (pxmitpriv->hwxmit_entry == 5) {
961 pxmitpriv->bmc_txqueue.head = 0;
962 hwxmits[0] .phwtxqueue = &pxmitpriv->bmc_txqueue;
963 hwxmits[0] .sta_queue = &pxmitpriv->bm_pending;
964 pxmitpriv->vo_txqueue.head = 0;
965 hwxmits[1] .phwtxqueue = &pxmitpriv->vo_txqueue;
966 hwxmits[1] .sta_queue = &pxmitpriv->vo_pending;
967 pxmitpriv->vi_txqueue.head = 0;
968 hwxmits[2] .phwtxqueue = &pxmitpriv->vi_txqueue;
969 hwxmits[2] .sta_queue = &pxmitpriv->vi_pending;
970 pxmitpriv->bk_txqueue.head = 0;
971 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
972 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
973 pxmitpriv->be_txqueue.head = 0;
974 hwxmits[4] .phwtxqueue = &pxmitpriv->be_txqueue;
975 hwxmits[4] .sta_queue = &pxmitpriv->be_pending;
976 } else if (pxmitpriv->hwxmit_entry == 4) {
977 pxmitpriv->vo_txqueue.head = 0;
978 hwxmits[0] .phwtxqueue = &pxmitpriv->vo_txqueue;
979 hwxmits[0] .sta_queue = &pxmitpriv->vo_pending;
980 pxmitpriv->vi_txqueue.head = 0;
981 hwxmits[1] .phwtxqueue = &pxmitpriv->vi_txqueue;
982 hwxmits[1] .sta_queue = &pxmitpriv->vi_pending;
983 pxmitpriv->be_txqueue.head = 0;
984 hwxmits[2] .phwtxqueue = &pxmitpriv->be_txqueue;
985 hwxmits[2] .sta_queue = &pxmitpriv->be_pending;
986 pxmitpriv->bk_txqueue.head = 0;
987 hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
988 hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
989 }
990 }
991
992 static void free_hwxmits(struct _adapter *padapter)
993 {
994 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
995
996 kfree(pxmitpriv->hwxmits);
997 }
998
999 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry)
1000 {
1001 sint i;
1002
1003 for (i = 0; i < entry; i++, phwxmit++) {
1004 spin_lock_init(&phwxmit->xmit_lock);
1005 INIT_LIST_HEAD(&phwxmit->pending);
1006 phwxmit->txcmdcnt = 0;
1007 phwxmit->accnt = 0;
1008 }
1009 }
1010
1011 void xmitframe_xmitbuf_attach(struct xmit_frame *pxmitframe,
1012 struct xmit_buf *pxmitbuf)
1013 {
1014 /* pxmitbuf attach to pxmitframe */
1015 pxmitframe->pxmitbuf = pxmitbuf;
1016 /* urb and irp connection */
1017 pxmitframe->pxmit_urb[0] = pxmitbuf->pxmit_urb[0];
1018 /* buffer addr assoc */
1019 pxmitframe->buf_addr = pxmitbuf->pbuf;
1020 /* pxmitframe attach to pxmitbuf */
1021 pxmitbuf->priv_data = pxmitframe;
1022 }
1023
1024 /*
1025 * tx_action == 0 == no frames to transmit
1026 * tx_action > 0 ==> we have frames to transmit
1027 * tx_action < 0 ==> we have frames to transmit, but TXFF is not even enough
1028 * to transmit 1 frame.
1029 */
1030
1031 int r8712_pre_xmit(struct _adapter *padapter, struct xmit_frame *pxmitframe)
1032 {
1033 unsigned long irqL;
1034 int ret;
1035 struct xmit_buf *pxmitbuf = NULL;
1036 struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
1037 struct pkt_attrib *pattrib = &pxmitframe->attrib;
1038
1039 r8712_do_queue_select(padapter, pattrib);
1040 spin_lock_irqsave(&pxmitpriv->lock, irqL);
1041 if (r8712_txframes_sta_ac_pending(padapter, pattrib) > 0) {
1042 ret = false;
1043 r8712_xmit_enqueue(padapter, pxmitframe);
1044 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1045 return ret;
1046 }
1047 pxmitbuf = r8712_alloc_xmitbuf(pxmitpriv);
1048 if (pxmitbuf == NULL) { /*enqueue packet*/
1049 ret = false;
1050 r8712_xmit_enqueue(padapter, pxmitframe);
1051 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1052 } else { /*dump packet directly*/
1053 spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1054 ret = true;
1055 xmitframe_xmitbuf_attach(pxmitframe, pxmitbuf);
1056 r8712_xmit_direct(padapter, pxmitframe);
1057 }
1058 return ret;
1059 }
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