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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_listhead(&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_listhead(&psta_xmitpriv->legacy_dz);
61 	_init_listhead(&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 = _malloc(NR_XMITFRAME *
91 					  sizeof(struct xmit_frame) + 4);
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_listhead(&(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_insert_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 = _malloc(NR_XMITBUFF *
130 					sizeof(struct xmit_buf) + 4);
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_listhead(&pxmitbuf->list);
138 		pxmitbuf->pallocated_buf = _malloc(MAX_XMITBUF_SZ +
139 					   XMITBUF_ALIGN_SZ);
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_insert_tail(&pxmitbuf->list,
147 				 &(pxmitpriv->free_xmitbuf_queue.queue));
148 		pxmitbuf++;
149 	}
150 	pxmitpriv->free_xmitbuf_cnt = NR_XMITBUFF;
151 	_init_workitem(&padapter->wkFilterRxFF0, r8712_SetFilter, padapter);
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 	uint i;
188 	struct pkt_file pktfile;
189 	struct sta_info *psta = NULL;
190 	struct ethhdr etherhdr;
191 
192 	struct tx_cmd txdesc;
193 
194 	sint bmcast;
195 	struct sta_priv		*pstapriv = &padapter->stapriv;
196 	struct security_priv	*psecuritypriv = &padapter->securitypriv;
197 	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;
198 	struct qos_priv		*pqospriv = &pmlmepriv->qospriv;
199 
200 	_r8712_open_pktfile(pkt, &pktfile);
201 
202 	i = _r8712_pktfile_read(&pktfile, (unsigned char *)&etherhdr, ETH_HLEN);
203 
204 	pattrib->ether_type = ntohs(etherhdr.h_proto);
205 
206 {
207 	u8 bool;
208 	/*If driver xmit ARP packet, driver can set ps mode to initial
209 	 * setting. It stands for getting DHCP or fix IP.*/
210 	if (pattrib->ether_type == 0x0806) {
211 		if (padapter->pwrctrlpriv.pwr_mode !=
212 		    padapter->registrypriv.power_mgnt) {
213 			_cancel_timer(&(pmlmepriv->dhcp_timer), &bool);
214 			r8712_set_ps_mode(padapter, padapter->registrypriv.
215 				power_mgnt, padapter->registrypriv.smart_ps);
216 		}
217 	}
218 }
219 	memcpy(pattrib->dst, &etherhdr.h_dest, ETH_ALEN);
220 	memcpy(pattrib->src, &etherhdr.h_source, ETH_ALEN);
221 	pattrib->pctrl = 0;
222 	if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
223 	    (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
224 		memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
225 		memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
226 	} else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
227 		memcpy(pattrib->ra, get_bssid(pmlmepriv), ETH_ALEN);
228 		memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
229 	} else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
230 		memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
231 		memcpy(pattrib->ta, get_bssid(pmlmepriv), ETH_ALEN);
232 	} else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
233 		/*firstly, filter packet not belongs to mp*/
234 		if (pattrib->ether_type != 0x8712)
235 			return _FAIL;
236 		/* for mp storing the txcmd per packet,
237 		 * according to the info of txcmd to update pattrib */
238 		/*get MP_TXDESC_SIZE bytes txcmd per packet*/
239 		i = _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 (ETH_P_IP == pattrib->ether_type) {
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 		u8 tmp[24];
251 		_r8712_pktfile_read(&pktfile, &tmp[0], 24);
252 		pattrib->dhcp_pkt = 0;
253 		if (pktfile.pkt_len > 282) {/*MINIMUM_DHCP_PACKET_SIZE)*/
254 			if (ETH_P_IP == pattrib->ether_type) {/* IP header*/
255 				if (((tmp[21] == 68) && (tmp[23] == 67)) ||
256 					((tmp[21] == 67) && (tmp[23] == 68))) {
257 					/* 68 : UDP BOOTP client
258 					 * 67 : UDP BOOTP server
259 					 * Use low rate to send DHCP packet.*/
260 					pattrib->dhcp_pkt = 1;
261 				}
262 			}
263 		}
264 	}
265 	bmcast = IS_MCAST(pattrib->ra);
266 	/* get sta_info*/
267 	if (bmcast) {
268 		psta = r8712_get_bcmc_stainfo(padapter);
269 		pattrib->mac_id = 4;
270 	} else {
271 		if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
272 			psta = r8712_get_stainfo(pstapriv,
273 						 get_bssid(pmlmepriv));
274 			pattrib->mac_id = 5;
275 		} else {
276 			psta = r8712_get_stainfo(pstapriv, pattrib->ra);
277 			if (psta == NULL)  /* drop the pkt */
278 				return _FAIL;
279 			if (check_fwstate(pmlmepriv, WIFI_STATION_STATE))
280 				pattrib->mac_id = 5;
281 			else
282 				pattrib->mac_id = psta->mac_id;
283 		}
284 	}
285 
286 	if (psta) {
287 		pattrib->psta = psta;
288 	} else {
289 		/* if we cannot get psta => drrp the pkt */
290 		return _FAIL;
291 	}
292 
293 	pattrib->ack_policy = 0;
294 	/* get ether_hdr_len */
295 	pattrib->pkt_hdrlen = ETH_HLEN;
296 
297 	if (pqospriv->qos_option)
298 		r8712_set_qos(&pktfile, pattrib);
299 	else {
300 		pattrib->hdrlen = WLAN_HDR_A3_LEN;
301 		pattrib->subtype = WIFI_DATA_TYPE;
302 		pattrib->priority = 0;
303 	}
304 	if (psta->ieee8021x_blocked == true) {
305 		pattrib->encrypt = 0;
306 		if ((pattrib->ether_type != 0x888e) &&
307 		    (check_fwstate(pmlmepriv, WIFI_MP_STATE) == false))
308 			return _FAIL;
309 	} else
310 		GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, bmcast);
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 == true) ||
335 	     (psecuritypriv->hw_decrypted == false)))
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) == true)
342 		pattrib->priority = (txdesc.txdw1 >> QSEL_SHT) & 0x1f;
343 	return _SUCCESS;
344 }
345 
xmitframe_addmic(struct _adapter * padapter,struct xmit_frame * pxmitframe)346 static sint xmitframe_addmic(struct _adapter *padapter,
347 			     struct xmit_frame *pxmitframe)
348 {
349 	u32	curfragnum, length, datalen;
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 			datalen = pattrib->pktlen - pattrib->hdrlen;
372 			pframe = pxmitframe->buf_addr + TXDESC_OFFSET;
373 			if (bmcst) {
374 				if (!memcmp(psecuritypriv->XGrptxmickey
375 				   [psecuritypriv->XGrpKeyid].skey,
376 				   null_key, 16))
377 					return _FAIL;
378 				/*start to calculate the mic code*/
379 				r8712_secmicsetkey(&micdata,
380 					 psecuritypriv->
381 					 XGrptxmickey[psecuritypriv->
382 					XGrpKeyid].skey);
383 			} else {
384 				if (!memcmp(&stainfo->tkiptxmickey.skey[0],
385 					    null_key, 16))
386 					return _FAIL;
387 				/* start to calculate the mic code */
388 				r8712_secmicsetkey(&micdata,
389 					     &stainfo->tkiptxmickey.skey[0]);
390 			}
391 			if (pframe[1] & 1) {   /* ToDS==1 */
392 				r8712_secmicappend(&micdata,
393 						   &pframe[16], 6); /*DA*/
394 				if (pframe[1]&2)  /* From Ds==1 */
395 					r8712_secmicappend(&micdata,
396 							   &pframe[24], 6);
397 				else
398 					r8712_secmicappend(&micdata,
399 							   &pframe[10], 6);
400 			} else {	/* ToDS==0 */
401 				r8712_secmicappend(&micdata,
402 						   &pframe[4], 6); /* DA */
403 				if (pframe[1]&2)  /* From Ds==1 */
404 					r8712_secmicappend(&micdata,
405 							   &pframe[16], 6);
406 				else
407 					r8712_secmicappend(&micdata,
408 							   &pframe[10], 6);
409 			}
410 			if (pqospriv->qos_option == 1)
411 					priority[0] = (u8)pxmitframe->
412 						      attrib.priority;
413 			r8712_secmicappend(&micdata, &priority[0], 4);
414 			payload = pframe;
415 			for (curfragnum = 0; curfragnum < pattrib->nr_frags;
416 			     curfragnum++) {
417 				payload = (u8 *)RND4((addr_t)(payload));
418 				payload = payload+pattrib->
419 					  hdrlen+pattrib->iv_len;
420 				if ((curfragnum + 1) == pattrib->nr_frags) {
421 					length = pattrib->last_txcmdsz -
422 						  pattrib->hdrlen -
423 						  pattrib->iv_len -
424 						  ((psecuritypriv->sw_encrypt)
425 						  ? pattrib->icv_len : 0);
426 					r8712_secmicappend(&micdata, payload,
427 							   length);
428 					payload = payload+length;
429 				} else{
430 					length = pxmitpriv->frag_len -
431 					    pattrib->hdrlen-pattrib->iv_len -
432 					    ((psecuritypriv->sw_encrypt) ?
433 					    pattrib->icv_len : 0);
434 					r8712_secmicappend(&micdata, payload,
435 							   length);
436 					payload = payload + length +
437 						  pattrib->icv_len;
438 				}
439 			}
440 			r8712_secgetmic(&micdata, &(mic[0]));
441 			/* add mic code  and add the mic code length in
442 			 * last_txcmdsz */
443 			memcpy(payload, &(mic[0]), 8);
444 			pattrib->last_txcmdsz += 8;
445 			payload = payload-pattrib->last_txcmdsz + 8;
446 		}
447 	}
448 	return _SUCCESS;
449 }
450 
xmitframe_swencrypt(struct _adapter * padapter,struct xmit_frame * pxmitframe)451 static sint xmitframe_swencrypt(struct _adapter *padapter,
452 				struct xmit_frame *pxmitframe)
453 {
454 	struct pkt_attrib	*pattrib = &pxmitframe->attrib;
455 
456 	if (pattrib->bswenc) {
457 		switch (pattrib->encrypt) {
458 		case _WEP40_:
459 		case _WEP104_:
460 			r8712_wep_encrypt(padapter, (u8 *)pxmitframe);
461 			break;
462 		case _TKIP_:
463 			r8712_tkip_encrypt(padapter, (u8 *)pxmitframe);
464 			break;
465 		case _AES_:
466 			r8712_aes_encrypt(padapter, (u8 *)pxmitframe);
467 			break;
468 		default:
469 				break;
470 		}
471 	}
472 	return _SUCCESS;
473 }
474 
make_wlanhdr(struct _adapter * padapter,u8 * hdr,struct pkt_attrib * pattrib)475 static sint make_wlanhdr(struct _adapter *padapter , u8 *hdr,
476 			 struct pkt_attrib *pattrib)
477 {
478 	u16 *qc;
479 
480 	struct ieee80211_hdr *pwlanhdr = (struct ieee80211_hdr *)hdr;
481 	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
482 	struct qos_priv *pqospriv = &pmlmepriv->qospriv;
483 	u16 *fctrl = &pwlanhdr->frame_ctl;
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) == true)) {
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) == true)) {
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) == true)
502 			   || (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)
503 			   == true)) {
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) == true) {
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 		if (pattrib->encrypt)
517 			SetPrivacy(fctrl);
518 		if (pqospriv->qos_option) {
519 			qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
520 			if (pattrib->priority)
521 				SetPriority(qc, pattrib->priority);
522 			SetAckpolicy(qc, pattrib->ack_policy);
523 		}
524 		/* TODO: fill HT Control Field */
525 		/* Update Seq Num will be handled by f/w */
526 		{
527 			struct sta_info *psta;
528 
529 			sint bmcst = IS_MCAST(pattrib->ra);
530 			if (pattrib->psta)
531 				psta = pattrib->psta;
532 			else {
533 				if (bmcst)
534 					psta = r8712_get_bcmc_stainfo(padapter);
535 				else
536 					psta =
537 					 r8712_get_stainfo(&padapter->stapriv,
538 					 pattrib->ra);
539 			}
540 			if (psta) {
541 				psta->sta_xmitpriv.txseq_tid
542 						  [pattrib->priority]++;
543 				psta->sta_xmitpriv.txseq_tid[pattrib->priority]
544 						   &= 0xFFF;
545 				pattrib->seqnum = psta->sta_xmitpriv.
546 						  txseq_tid[pattrib->priority];
547 				SetSeqNum(hdr, pattrib->seqnum);
548 			}
549 		}
550 	}
551 	return _SUCCESS;
552 }
553 
r8712_put_snap(u8 * data,u16 h_proto)554 static sint r8712_put_snap(u8 *data, u16 h_proto)
555 {
556 	struct ieee80211_snap_hdr *snap;
557 	const u8 *oui;
558 
559 	snap = (struct ieee80211_snap_hdr *)data;
560 	snap->dsap = 0xaa;
561 	snap->ssap = 0xaa;
562 	snap->ctrl = 0x03;
563 	if (h_proto == 0x8137 || h_proto == 0x80f3)
564 		oui = P802_1H_OUI;
565 	else
566 		oui = RFC1042_OUI;
567 	snap->oui[0] = oui[0];
568 	snap->oui[1] = oui[1];
569 	snap->oui[2] = oui[2];
570 	*(u16 *)(data + SNAP_SIZE) = htons(h_proto);
571 	return SNAP_SIZE + sizeof(u16);
572 }
573 
574 /*
575  * This sub-routine will perform all the following:
576  * 1. remove 802.3 header.
577  * 2. create wlan_header, based on the info in pxmitframe
578  * 3. append sta's iv/ext-iv
579  * 4. append LLC
580  * 5. move frag chunk from pframe to pxmitframe->mem
581  * 6. apply sw-encrypt, if necessary.
582  */
r8712_xmitframe_coalesce(struct _adapter * padapter,_pkt * pkt,struct xmit_frame * pxmitframe)583 sint r8712_xmitframe_coalesce(struct _adapter *padapter, _pkt *pkt,
584 			struct xmit_frame *pxmitframe)
585 {
586 	struct pkt_file pktfile;
587 
588 	sint	frg_len, mpdu_len, llc_sz;
589 	u32	mem_sz;
590 	u8	frg_inx;
591 	addr_t addr;
592 	u8 *pframe, *mem_start, *ptxdesc;
593 	struct sta_info		*psta;
594 	struct security_priv	*psecuritypriv = &padapter->securitypriv;
595 	struct mlme_priv	*pmlmepriv = &padapter->mlmepriv;
596 	struct xmit_priv	*pxmitpriv = &padapter->xmitpriv;
597 	struct pkt_attrib	*pattrib = &pxmitframe->attrib;
598 	u8 *pbuf_start;
599 	sint bmcst = IS_MCAST(pattrib->ra);
600 
601 	if (pattrib->psta == NULL)
602 		return _FAIL;
603 	psta = pattrib->psta;
604 	if (pxmitframe->buf_addr == NULL)
605 		return _FAIL;
606 	pbuf_start = pxmitframe->buf_addr;
607 	ptxdesc = pbuf_start;
608 	mem_start = pbuf_start + TXDESC_OFFSET;
609 	if (make_wlanhdr(padapter, mem_start, pattrib) == _FAIL)
610 		return _FAIL;
611 	_r8712_open_pktfile(pkt, &pktfile);
612 	_r8712_pktfile_read(&pktfile, NULL, (uint) pattrib->pkt_hdrlen);
613 	if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
614 		/* truncate TXDESC_SIZE bytes txcmd if at mp mode for 871x */
615 		if (pattrib->ether_type == 0x8712) {
616 			/* take care -  update_txdesc overwrite this */
617 			_r8712_pktfile_read(&pktfile, ptxdesc, TXDESC_SIZE);
618 		}
619 	}
620 	pattrib->pktlen = pktfile.pkt_len;
621 	frg_inx = 0;
622 	frg_len = pxmitpriv->frag_len - 4;
623 	while (1) {
624 		llc_sz = 0;
625 		mpdu_len = frg_len;
626 		pframe = mem_start;
627 		SetMFrag(mem_start);
628 		pframe += pattrib->hdrlen;
629 		mpdu_len -= pattrib->hdrlen;
630 		/* adding icv, if necessary...*/
631 		if (pattrib->iv_len) {
632 			if (psta != NULL) {
633 				switch (pattrib->encrypt) {
634 				case _WEP40_:
635 				case _WEP104_:
636 					WEP_IV(pattrib->iv, psta->txpn,
637 					       (u8)psecuritypriv->
638 					       PrivacyKeyIndex);
639 					break;
640 				case _TKIP_:
641 					if (bmcst)
642 						TKIP_IV(pattrib->iv,
643 						    psta->txpn,
644 						    (u8)psecuritypriv->
645 						    XGrpKeyid);
646 					else
647 						TKIP_IV(pattrib->iv, psta->txpn,
648 							0);
649 					break;
650 				case _AES_:
651 					if (bmcst)
652 						AES_IV(pattrib->iv, psta->txpn,
653 						    (u8)psecuritypriv->
654 						    XGrpKeyid);
655 					else
656 						AES_IV(pattrib->iv, psta->txpn,
657 						       0);
658 					break;
659 				}
660 			}
661 			memcpy(pframe, pattrib->iv, pattrib->iv_len);
662 			pframe += pattrib->iv_len;
663 			mpdu_len -= pattrib->iv_len;
664 		}
665 		if (frg_inx == 0) {
666 			llc_sz = r8712_put_snap(pframe, pattrib->ether_type);
667 			pframe += llc_sz;
668 			mpdu_len -= llc_sz;
669 		}
670 		if ((pattrib->icv_len > 0) && (pattrib->bswenc))
671 			mpdu_len -= pattrib->icv_len;
672 		if (bmcst)
673 			mem_sz = _r8712_pktfile_read(&pktfile, pframe,
674 				 pattrib->pktlen);
675 		else
676 			mem_sz = _r8712_pktfile_read(&pktfile, pframe,
677 				 mpdu_len);
678 		pframe += mem_sz;
679 		if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
680 			memcpy(pframe, pattrib->icv, pattrib->icv_len);
681 			pframe += pattrib->icv_len;
682 		}
683 		frg_inx++;
684 		if (bmcst || (r8712_endofpktfile(&pktfile) == true)) {
685 			pattrib->nr_frags = frg_inx;
686 			pattrib->last_txcmdsz = pattrib->hdrlen +
687 						pattrib->iv_len +
688 						((pattrib->nr_frags == 1) ?
689 						llc_sz : 0) +
690 						((pattrib->bswenc) ?
691 						pattrib->icv_len : 0) + mem_sz;
692 			ClearMFrag(mem_start);
693 			break;
694 		}
695 		addr = (addr_t)(pframe);
696 		mem_start = (unsigned char *)RND4(addr) + TXDESC_OFFSET;
697 		memcpy(mem_start, pbuf_start + TXDESC_OFFSET, pattrib->hdrlen);
698 	}
699 
700 	if (xmitframe_addmic(padapter, pxmitframe) == _FAIL)
701 		return _FAIL;
702 	xmitframe_swencrypt(padapter, pxmitframe);
703 	return _SUCCESS;
704 }
705 
r8712_update_protection(struct _adapter * padapter,u8 * ie,uint ie_len)706 void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len)
707 {
708 	uint	protection;
709 	u8	*perp;
710 	sint	 erp_len;
711 	struct	xmit_priv *pxmitpriv = &padapter->xmitpriv;
712 	struct	registry_priv *pregistrypriv = &padapter->registrypriv;
713 
714 	switch (pxmitpriv->vcs_setting) {
715 	case DISABLE_VCS:
716 		pxmitpriv->vcs = NONE_VCS;
717 		break;
718 	case ENABLE_VCS:
719 		break;
720 	case AUTO_VCS:
721 	default:
722 		perp = r8712_get_ie(ie, _ERPINFO_IE_, &erp_len, ie_len);
723 		if (perp == NULL)
724 			pxmitpriv->vcs = NONE_VCS;
725 		else {
726 			protection = (*(perp + 2)) & BIT(1);
727 			if (protection) {
728 				if (pregistrypriv->vcs_type == RTS_CTS)
729 					pxmitpriv->vcs = RTS_CTS;
730 				else
731 					pxmitpriv->vcs = CTS_TO_SELF;
732 			} else
733 				pxmitpriv->vcs = NONE_VCS;
734 		}
735 		break;
736 	}
737 }
738 
r8712_alloc_xmitbuf(struct xmit_priv * pxmitpriv)739 struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
740 {
741 	unsigned long irqL;
742 	struct xmit_buf *pxmitbuf =  NULL;
743 	struct list_head *plist, *phead;
744 	struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
745 
746 	spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
747 	if (_queue_empty(pfree_xmitbuf_queue) == true)
748 		pxmitbuf = NULL;
749 	else {
750 		phead = get_list_head(pfree_xmitbuf_queue);
751 		plist = get_next(phead);
752 		pxmitbuf = LIST_CONTAINOR(plist, struct xmit_buf, list);
753 		list_delete(&(pxmitbuf->list));
754 	}
755 	if (pxmitbuf !=  NULL)
756 		pxmitpriv->free_xmitbuf_cnt--;
757 	spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
758 	return pxmitbuf;
759 }
760 
r8712_free_xmitbuf(struct xmit_priv * pxmitpriv,struct xmit_buf * pxmitbuf)761 int r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
762 {
763 	unsigned long irqL;
764 	struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
765 
766 	if (pxmitbuf == NULL)
767 		return _FAIL;
768 	spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
769 	list_delete(&pxmitbuf->list);
770 	list_insert_tail(&(pxmitbuf->list), get_list_head(pfree_xmitbuf_queue));
771 	pxmitpriv->free_xmitbuf_cnt++;
772 	spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
773 	return _SUCCESS;
774 }
775 
776 /*
777 Calling context:
778 1. OS_TXENTRY
779 2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)
780 
781 If we turn on USE_RXTHREAD, then, no need for critical section.
782 Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...
783 
784 Must be very very cautious...
785 
786 */
787 
r8712_alloc_xmitframe(struct xmit_priv * pxmitpriv)788 struct xmit_frame *r8712_alloc_xmitframe(struct xmit_priv *pxmitpriv)
789 {
790 	/*
791 		Please remember to use all the osdep_service api,
792 		and lock/unlock or _enter/_exit critical to protect
793 		pfree_xmit_queue
794 	*/
795 	unsigned long irqL;
796 	struct xmit_frame *pxframe = NULL;
797 	struct list_head *plist, *phead;
798 	struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
799 
800 	spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
801 	if (_queue_empty(pfree_xmit_queue) == true)
802 		pxframe =  NULL;
803 	else {
804 		phead = get_list_head(pfree_xmit_queue);
805 		plist = get_next(phead);
806 		pxframe = LIST_CONTAINOR(plist, struct xmit_frame, list);
807 		list_delete(&(pxframe->list));
808 	}
809 	if (pxframe !=  NULL) {
810 		pxmitpriv->free_xmitframe_cnt--;
811 		pxframe->buf_addr = NULL;
812 		pxframe->pxmitbuf = NULL;
813 		pxframe->attrib.psta = NULL;
814 		pxframe->pkt = NULL;
815 	}
816 	spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
817 	return pxframe;
818 }
819 
r8712_free_xmitframe(struct xmit_priv * pxmitpriv,struct xmit_frame * pxmitframe)820 void r8712_free_xmitframe(struct xmit_priv *pxmitpriv,
821 			  struct xmit_frame *pxmitframe)
822 {
823 	unsigned long irqL;
824 	struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
825 	struct _adapter *padapter = pxmitpriv->adapter;
826 	struct sk_buff *pndis_pkt = NULL;
827 
828 	if (pxmitframe == NULL)
829 		return;
830 	spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
831 	list_delete(&pxmitframe->list);
832 	if (pxmitframe->pkt) {
833 		pndis_pkt = pxmitframe->pkt;
834 		pxmitframe->pkt = NULL;
835 	}
836 	list_insert_tail(&pxmitframe->list, get_list_head(pfree_xmit_queue));
837 	pxmitpriv->free_xmitframe_cnt++;
838 	spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
839 	if (netif_queue_stopped(padapter->pnetdev))
840 		netif_wake_queue(padapter->pnetdev);
841 }
842 
r8712_free_xmitframe_ex(struct xmit_priv * pxmitpriv,struct xmit_frame * pxmitframe)843 void r8712_free_xmitframe_ex(struct xmit_priv *pxmitpriv,
844 		      struct xmit_frame *pxmitframe)
845 {
846 	if (pxmitframe == NULL)
847 		return;
848 	if (pxmitframe->frame_tag == DATA_FRAMETAG)
849 		r8712_free_xmitframe(pxmitpriv, pxmitframe);
850 }
851 
r8712_free_xmitframe_queue(struct xmit_priv * pxmitpriv,struct __queue * pframequeue)852 void r8712_free_xmitframe_queue(struct xmit_priv *pxmitpriv,
853 				struct  __queue *pframequeue)
854 {
855 	unsigned long irqL;
856 	struct list_head *plist, *phead;
857 	struct	xmit_frame	*pxmitframe;
858 
859 	spin_lock_irqsave(&(pframequeue->lock), irqL);
860 	phead = get_list_head(pframequeue);
861 	plist = get_next(phead);
862 	while (end_of_queue_search(phead, plist) == false) {
863 		pxmitframe = LIST_CONTAINOR(plist, struct xmit_frame, list);
864 		plist = get_next(plist);
865 		r8712_free_xmitframe(pxmitpriv, pxmitframe);
866 	}
867 	spin_unlock_irqrestore(&(pframequeue->lock), irqL);
868 }
869 
get_sta_pending(struct _adapter * padapter,struct __queue ** ppstapending,struct sta_info * psta,sint up)870 static inline struct tx_servq *get_sta_pending(struct _adapter *padapter,
871 					       struct  __queue **ppstapending,
872 					       struct sta_info *psta, sint up)
873 {
874 
875 	struct tx_servq *ptxservq;
876 	struct hw_xmit *phwxmits =  padapter->xmitpriv.hwxmits;
877 
878 	switch (up) {
879 	case 1:
880 	case 2:
881 		ptxservq = &(psta->sta_xmitpriv.bk_q);
882 		*ppstapending = &padapter->xmitpriv.bk_pending;
883 		(phwxmits+3)->accnt++;
884 		break;
885 	case 4:
886 	case 5:
887 		ptxservq = &(psta->sta_xmitpriv.vi_q);
888 		*ppstapending = &padapter->xmitpriv.vi_pending;
889 		(phwxmits+1)->accnt++;
890 		break;
891 	case 6:
892 	case 7:
893 		ptxservq = &(psta->sta_xmitpriv.vo_q);
894 		*ppstapending = &padapter->xmitpriv.vo_pending;
895 		(phwxmits+0)->accnt++;
896 		break;
897 	case 0:
898 	case 3:
899 	default:
900 		ptxservq = &(psta->sta_xmitpriv.be_q);
901 		*ppstapending = &padapter->xmitpriv.be_pending;
902 		(phwxmits + 2)->accnt++;
903 		break;
904 	}
905 	return ptxservq;
906 }
907 
908 /*
909  * Will enqueue pxmitframe to the proper queue, and indicate it
910  * to xx_pending list.....
911  */
r8712_xmit_classifier(struct _adapter * padapter,struct xmit_frame * pxmitframe)912 sint r8712_xmit_classifier(struct _adapter *padapter,
913 			   struct xmit_frame *pxmitframe)
914 {
915 	unsigned long irqL0;
916 	struct  __queue *pstapending;
917 	struct sta_info	*psta;
918 	struct tx_servq	*ptxservq;
919 	struct pkt_attrib *pattrib = &pxmitframe->attrib;
920 	struct sta_priv *pstapriv = &padapter->stapriv;
921 	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
922 	sint bmcst = IS_MCAST(pattrib->ra);
923 
924 	if (pattrib->psta)
925 		psta = pattrib->psta;
926 	else {
927 		if (bmcst)
928 			psta = r8712_get_bcmc_stainfo(padapter);
929 		else {
930 			if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)
931 				psta = r8712_get_stainfo(pstapriv,
932 				       get_bssid(pmlmepriv));
933 			else
934 				psta = r8712_get_stainfo(pstapriv, pattrib->ra);
935 		}
936 	}
937 	if (psta == NULL)
938 		return _FAIL;
939 	ptxservq = get_sta_pending(padapter, &pstapending,
940 		   psta, pattrib->priority);
941 	spin_lock_irqsave(&pstapending->lock, irqL0);
942 	if (is_list_empty(&ptxservq->tx_pending))
943 		list_insert_tail(&ptxservq->tx_pending,
944 				 get_list_head(pstapending));
945 	list_insert_tail(&pxmitframe->list,
946 			 get_list_head(&ptxservq->sta_pending));
947 	ptxservq->qcnt++;
948 	spin_unlock_irqrestore(&pstapending->lock, irqL0);
949 	return _SUCCESS;
950 }
951 
alloc_hwxmits(struct _adapter * padapter)952 static void alloc_hwxmits(struct _adapter *padapter)
953 {
954 	struct hw_xmit *hwxmits;
955 	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
956 
957 	pxmitpriv->hwxmit_entry = HWXMIT_ENTRY;
958 	pxmitpriv->hwxmits = (struct hw_xmit *)_malloc(sizeof(struct hw_xmit) *
959 			     pxmitpriv->hwxmit_entry);
960 	if (pxmitpriv->hwxmits == NULL)
961 		return;
962 	hwxmits = pxmitpriv->hwxmits;
963 	if (pxmitpriv->hwxmit_entry == 5) {
964 		pxmitpriv->bmc_txqueue.head = 0;
965 		hwxmits[0] .phwtxqueue = &pxmitpriv->bmc_txqueue;
966 		hwxmits[0] .sta_queue = &pxmitpriv->bm_pending;
967 		pxmitpriv->vo_txqueue.head = 0;
968 		hwxmits[1] .phwtxqueue = &pxmitpriv->vo_txqueue;
969 		hwxmits[1] .sta_queue = &pxmitpriv->vo_pending;
970 	pxmitpriv->vi_txqueue.head = 0;
971 		hwxmits[2] .phwtxqueue = &pxmitpriv->vi_txqueue;
972 		hwxmits[2] .sta_queue = &pxmitpriv->vi_pending;
973 		pxmitpriv->bk_txqueue.head = 0;
974 		hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
975 		hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
976 		pxmitpriv->be_txqueue.head = 0;
977 		hwxmits[4] .phwtxqueue = &pxmitpriv->be_txqueue;
978 		hwxmits[4] .sta_queue = &pxmitpriv->be_pending;
979 	} else if (pxmitpriv->hwxmit_entry == 4) {
980 		pxmitpriv->vo_txqueue.head = 0;
981 		hwxmits[0] .phwtxqueue = &pxmitpriv->vo_txqueue;
982 		hwxmits[0] .sta_queue = &pxmitpriv->vo_pending;
983 		pxmitpriv->vi_txqueue.head = 0;
984 		hwxmits[1] .phwtxqueue = &pxmitpriv->vi_txqueue;
985 		hwxmits[1] .sta_queue = &pxmitpriv->vi_pending;
986 		pxmitpriv->be_txqueue.head = 0;
987 		hwxmits[2] .phwtxqueue = &pxmitpriv->be_txqueue;
988 		hwxmits[2] .sta_queue = &pxmitpriv->be_pending;
989 		pxmitpriv->bk_txqueue.head = 0;
990 		hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
991 		hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
992 	}
993 }
994 
free_hwxmits(struct _adapter * padapter)995 static void free_hwxmits(struct _adapter *padapter)
996 {
997 	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
998 
999 	kfree(pxmitpriv->hwxmits);
1000 }
1001 
init_hwxmits(struct hw_xmit * phwxmit,sint entry)1002 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry)
1003 {
1004 	sint i;
1005 
1006 	for (i = 0; i < entry; i++, phwxmit++) {
1007 		spin_lock_init(&phwxmit->xmit_lock);
1008 		_init_listhead(&phwxmit->pending);
1009 		phwxmit->txcmdcnt = 0;
1010 		phwxmit->accnt = 0;
1011 	}
1012 }
1013 
xmitframe_xmitbuf_attach(struct xmit_frame * pxmitframe,struct xmit_buf * pxmitbuf)1014 void xmitframe_xmitbuf_attach(struct xmit_frame *pxmitframe,
1015 			struct xmit_buf *pxmitbuf)
1016 {
1017 	/* pxmitbuf attach to pxmitframe */
1018 	pxmitframe->pxmitbuf = pxmitbuf;
1019 	/* urb and irp connection */
1020 	pxmitframe->pxmit_urb[0] = pxmitbuf->pxmit_urb[0];
1021 	/* buffer addr assoc */
1022 	pxmitframe->buf_addr = pxmitbuf->pbuf;
1023 	/* pxmitframe attach to pxmitbuf */
1024 	pxmitbuf->priv_data = pxmitframe;
1025 }
1026 
1027 /*
1028  * tx_action == 0 == no frames to transmit
1029  * tx_action > 0 ==> we have frames to transmit
1030  * tx_action < 0 ==> we have frames to transmit, but TXFF is not even enough
1031  *						 to transmit 1 frame.
1032  */
1033 
r8712_pre_xmit(struct _adapter * padapter,struct xmit_frame * pxmitframe)1034 int r8712_pre_xmit(struct _adapter *padapter, struct xmit_frame *pxmitframe)
1035 {
1036 	unsigned long irqL;
1037 	int ret;
1038 	struct xmit_buf *pxmitbuf = NULL;
1039 	struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
1040 	struct pkt_attrib *pattrib = &pxmitframe->attrib;
1041 
1042 	r8712_do_queue_select(padapter, pattrib);
1043 	spin_lock_irqsave(&pxmitpriv->lock, irqL);
1044 	if (r8712_txframes_sta_ac_pending(padapter, pattrib) > 0) {
1045 		ret = false;
1046 		r8712_xmit_enqueue(padapter, pxmitframe);
1047 		spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1048 		return ret;
1049 	}
1050 	pxmitbuf = r8712_alloc_xmitbuf(pxmitpriv);
1051 	if (pxmitbuf == NULL) { /*enqueue packet*/
1052 		ret = false;
1053 		r8712_xmit_enqueue(padapter, pxmitframe);
1054 		spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1055 	} else { /*dump packet directly*/
1056 		spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1057 		ret = true;
1058 		xmitframe_xmitbuf_attach(pxmitframe, pxmitbuf);
1059 		r8712_xmit_direct(padapter, pxmitframe);
1060 	}
1061 	return ret;
1062 }
1063