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0001 // SPDX-License-Identifier: GPL-2.0
0002 /******************************************************************************
0003  * rtl871x_xmit.c
0004  *
0005  * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
0006  * Linux device driver for RTL8192SU
0007  *
0008  * Modifications for inclusion into the Linux staging tree are
0009  * Copyright(c) 2010 Larry Finger. All rights reserved.
0010  *
0011  * Contact information:
0012  * WLAN FAE <wlanfae@realtek.com>
0013  * Larry Finger <Larry.Finger@lwfinger.net>
0014  *
0015  ******************************************************************************/
0016 
0017 #define _RTL871X_XMIT_C_
0018 
0019 #include "osdep_service.h"
0020 #include "drv_types.h"
0021 #include "osdep_intf.h"
0022 #include "usb_ops.h"
0023 
0024 #include <linux/ieee80211.h>
0025 
0026 static const u8 P802_1H_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0xf8};
0027 static const u8 RFC1042_OUI[P80211_OUI_LEN] = {0x00, 0x00, 0x00};
0028 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry);
0029 static void alloc_hwxmits(struct _adapter *padapter);
0030 static void free_hwxmits(struct _adapter *padapter);
0031 
0032 static void _init_txservq(struct tx_servq *ptxservq)
0033 {
0034     INIT_LIST_HEAD(&ptxservq->tx_pending);
0035     _init_queue(&ptxservq->sta_pending);
0036     ptxservq->qcnt = 0;
0037 }
0038 
0039 void _r8712_init_sta_xmit_priv(struct sta_xmit_priv *psta_xmitpriv)
0040 {
0041     memset((unsigned char *)psta_xmitpriv, 0,
0042          sizeof(struct sta_xmit_priv));
0043     spin_lock_init(&psta_xmitpriv->lock);
0044     _init_txservq(&psta_xmitpriv->be_q);
0045     _init_txservq(&psta_xmitpriv->bk_q);
0046     _init_txservq(&psta_xmitpriv->vi_q);
0047     _init_txservq(&psta_xmitpriv->vo_q);
0048     INIT_LIST_HEAD(&psta_xmitpriv->legacy_dz);
0049     INIT_LIST_HEAD(&psta_xmitpriv->apsd);
0050 }
0051 
0052 int _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv,
0053               struct _adapter *padapter)
0054 {
0055     sint i;
0056     struct xmit_buf *pxmitbuf;
0057     struct xmit_frame *pxframe;
0058 
0059     memset((unsigned char *)pxmitpriv, 0, sizeof(struct xmit_priv));
0060     spin_lock_init(&pxmitpriv->lock);
0061     /*
0062      *Please insert all the queue initialization using _init_queue below
0063      */
0064     pxmitpriv->adapter = padapter;
0065     _init_queue(&pxmitpriv->be_pending);
0066     _init_queue(&pxmitpriv->bk_pending);
0067     _init_queue(&pxmitpriv->vi_pending);
0068     _init_queue(&pxmitpriv->vo_pending);
0069     _init_queue(&pxmitpriv->bm_pending);
0070     _init_queue(&pxmitpriv->legacy_dz_queue);
0071     _init_queue(&pxmitpriv->apsd_queue);
0072     _init_queue(&pxmitpriv->free_xmit_queue);
0073     /*
0074      * Please allocate memory with sz = (struct xmit_frame) * NR_XMITFRAME,
0075      * and initialize free_xmit_frame below.
0076      * Please also apply  free_txobj to link_up all the xmit_frames...
0077      */
0078     pxmitpriv->pallocated_frame_buf =
0079         kmalloc(NR_XMITFRAME * sizeof(struct xmit_frame) + 4,
0080             GFP_ATOMIC);
0081     if (!pxmitpriv->pallocated_frame_buf) {
0082         pxmitpriv->pxmit_frame_buf = NULL;
0083         return -ENOMEM;
0084     }
0085     pxmitpriv->pxmit_frame_buf = pxmitpriv->pallocated_frame_buf + 4 -
0086             ((addr_t) (pxmitpriv->pallocated_frame_buf) & 3);
0087     pxframe = (struct xmit_frame *) pxmitpriv->pxmit_frame_buf;
0088     for (i = 0; i < NR_XMITFRAME; i++) {
0089         INIT_LIST_HEAD(&(pxframe->list));
0090         pxframe->padapter = padapter;
0091         pxframe->frame_tag = DATA_FRAMETAG;
0092         pxframe->pkt = NULL;
0093         pxframe->buf_addr = NULL;
0094         pxframe->pxmitbuf = NULL;
0095         list_add_tail(&(pxframe->list),
0096                  &(pxmitpriv->free_xmit_queue.queue));
0097         pxframe++;
0098     }
0099     pxmitpriv->free_xmitframe_cnt = NR_XMITFRAME;
0100     /*
0101      * init xmit hw_txqueue
0102      */
0103     _r8712_init_hw_txqueue(&pxmitpriv->be_txqueue, BE_QUEUE_INX);
0104     _r8712_init_hw_txqueue(&pxmitpriv->bk_txqueue, BK_QUEUE_INX);
0105     _r8712_init_hw_txqueue(&pxmitpriv->vi_txqueue, VI_QUEUE_INX);
0106     _r8712_init_hw_txqueue(&pxmitpriv->vo_txqueue, VO_QUEUE_INX);
0107     _r8712_init_hw_txqueue(&pxmitpriv->bmc_txqueue, BMC_QUEUE_INX);
0108     pxmitpriv->frag_len = MAX_FRAG_THRESHOLD;
0109     pxmitpriv->txirp_cnt = 1;
0110     /*per AC pending irp*/
0111     pxmitpriv->beq_cnt = 0;
0112     pxmitpriv->bkq_cnt = 0;
0113     pxmitpriv->viq_cnt = 0;
0114     pxmitpriv->voq_cnt = 0;
0115     /*init xmit_buf*/
0116     _init_queue(&pxmitpriv->free_xmitbuf_queue);
0117     _init_queue(&pxmitpriv->pending_xmitbuf_queue);
0118     pxmitpriv->pallocated_xmitbuf =
0119         kmalloc(NR_XMITBUFF * sizeof(struct xmit_buf) + 4, GFP_ATOMIC);
0120     if (!pxmitpriv->pallocated_xmitbuf) {
0121         kfree(pxmitpriv->pallocated_frame_buf);
0122         pxmitpriv->pallocated_frame_buf = NULL;
0123         return -ENOMEM;
0124     }
0125     pxmitpriv->pxmitbuf = pxmitpriv->pallocated_xmitbuf + 4 -
0126                   ((addr_t)(pxmitpriv->pallocated_xmitbuf) & 3);
0127     pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
0128     for (i = 0; i < NR_XMITBUFF; i++) {
0129         INIT_LIST_HEAD(&pxmitbuf->list);
0130         pxmitbuf->pallocated_buf =
0131             kmalloc(MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ, GFP_ATOMIC);
0132         if (!pxmitbuf->pallocated_buf)
0133             return -ENOMEM;
0134         pxmitbuf->pbuf = pxmitbuf->pallocated_buf + XMITBUF_ALIGN_SZ -
0135                  ((addr_t) (pxmitbuf->pallocated_buf) &
0136                  (XMITBUF_ALIGN_SZ - 1));
0137         if (r8712_xmit_resource_alloc(padapter, pxmitbuf))
0138             return -ENOMEM;
0139         list_add_tail(&pxmitbuf->list,
0140                  &(pxmitpriv->free_xmitbuf_queue.queue));
0141         pxmitbuf++;
0142     }
0143     pxmitpriv->free_xmitbuf_cnt = NR_XMITBUFF;
0144     INIT_WORK(&padapter->wk_filter_rx_ff0, r8712_SetFilter);
0145     alloc_hwxmits(padapter);
0146     init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
0147     tasklet_setup(&pxmitpriv->xmit_tasklet, r8712_xmit_bh);
0148     return 0;
0149 }
0150 
0151 void _free_xmit_priv(struct xmit_priv *pxmitpriv)
0152 {
0153     int i;
0154     struct _adapter *padapter = pxmitpriv->adapter;
0155     struct xmit_frame *pxmitframe = (struct xmit_frame *)
0156                     pxmitpriv->pxmit_frame_buf;
0157     struct xmit_buf *pxmitbuf = (struct xmit_buf *)pxmitpriv->pxmitbuf;
0158 
0159     if (!pxmitpriv->pxmit_frame_buf)
0160         return;
0161     for (i = 0; i < NR_XMITFRAME; i++) {
0162         r8712_xmit_complete(padapter, pxmitframe);
0163         pxmitframe++;
0164     }
0165     for (i = 0; i < NR_XMITBUFF; i++) {
0166         r8712_xmit_resource_free(padapter, pxmitbuf);
0167         kfree(pxmitbuf->pallocated_buf);
0168         pxmitbuf++;
0169     }
0170     kfree(pxmitpriv->pallocated_frame_buf);
0171     kfree(pxmitpriv->pallocated_xmitbuf);
0172     free_hwxmits(padapter);
0173 }
0174 
0175 int r8712_update_attrib(struct _adapter *padapter, _pkt *pkt,
0176             struct pkt_attrib *pattrib)
0177 {
0178     struct pkt_file pktfile;
0179     struct sta_info *psta = NULL;
0180     struct ethhdr etherhdr;
0181 
0182     struct tx_cmd txdesc;
0183 
0184     bool bmcast;
0185     struct sta_priv     *pstapriv = &padapter->stapriv;
0186     struct security_priv    *psecuritypriv = &padapter->securitypriv;
0187     struct mlme_priv    *pmlmepriv = &padapter->mlmepriv;
0188     struct qos_priv     *pqospriv = &pmlmepriv->qospriv;
0189 
0190     _r8712_open_pktfile(pkt, &pktfile);
0191 
0192     _r8712_pktfile_read(&pktfile, (unsigned char *)&etherhdr, ETH_HLEN);
0193 
0194     pattrib->ether_type = ntohs(etherhdr.h_proto);
0195 
0196     /*
0197      * If driver xmit ARP packet, driver can set ps mode to initial
0198      * setting. It stands for getting DHCP or fix IP.
0199      */
0200     if (pattrib->ether_type == 0x0806) {
0201         if (padapter->pwrctrlpriv.pwr_mode !=
0202             padapter->registrypriv.power_mgnt) {
0203             del_timer_sync(&pmlmepriv->dhcp_timer);
0204             r8712_set_ps_mode(padapter,
0205                       padapter->registrypriv.power_mgnt,
0206                       padapter->registrypriv.smart_ps);
0207         }
0208     }
0209 
0210     memcpy(pattrib->dst, &etherhdr.h_dest, ETH_ALEN);
0211     memcpy(pattrib->src, &etherhdr.h_source, ETH_ALEN);
0212     pattrib->pctrl = 0;
0213     if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
0214         check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
0215         memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
0216         memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
0217     } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
0218         memcpy(pattrib->ra, get_bssid(pmlmepriv), ETH_ALEN);
0219         memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
0220     } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
0221         memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
0222         memcpy(pattrib->ta, get_bssid(pmlmepriv), ETH_ALEN);
0223     } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
0224         /*firstly, filter packet not belongs to mp*/
0225         if (pattrib->ether_type != 0x8712)
0226             return -EINVAL;
0227         /* for mp storing the txcmd per packet,
0228          * according to the info of txcmd to update pattrib
0229          */
0230         /*get MP_TXDESC_SIZE bytes txcmd per packet*/
0231         _r8712_pktfile_read(&pktfile, (u8 *)&txdesc, TXDESC_SIZE);
0232         memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
0233         memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
0234         pattrib->pctrl = 1;
0235     }
0236     /* r8712_xmitframe_coalesce() overwrite this!*/
0237     pattrib->pktlen = pktfile.pkt_len;
0238     if (pattrib->ether_type == ETH_P_IP) {
0239         /* The following is for DHCP and ARP packet, we use cck1M to
0240          * tx these packets and let LPS awake some time
0241          * to prevent DHCP protocol fail
0242          */
0243         u8 tmp[24];
0244 
0245         _r8712_pktfile_read(&pktfile, &tmp[0], 24);
0246         pattrib->dhcp_pkt = 0;
0247         if (pktfile.pkt_len > 282) {/*MINIMUM_DHCP_PACKET_SIZE)*/
0248             if (pattrib->ether_type == ETH_P_IP) {/* IP header*/
0249                 if (((tmp[21] == 68) && (tmp[23] == 67)) ||
0250                     ((tmp[21] == 67) && (tmp[23] == 68))) {
0251                     /* 68 : UDP BOOTP client
0252                      * 67 : UDP BOOTP server
0253                      * Use low rate to send DHCP packet.
0254                      */
0255                     pattrib->dhcp_pkt = 1;
0256                 }
0257             }
0258         }
0259     }
0260     bmcast = is_multicast_ether_addr(pattrib->ra);
0261     /* get sta_info*/
0262     if (bmcast) {
0263         psta = r8712_get_bcmc_stainfo(padapter);
0264         pattrib->mac_id = 4;
0265     } else {
0266         if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
0267             psta = r8712_get_stainfo(pstapriv,
0268                          get_bssid(pmlmepriv));
0269             pattrib->mac_id = 5;
0270         } else {
0271             psta = r8712_get_stainfo(pstapriv, pattrib->ra);
0272             if (!psta)  /* drop the pkt */
0273                 return -ENOMEM;
0274             if (check_fwstate(pmlmepriv, WIFI_STATION_STATE))
0275                 pattrib->mac_id = 5;
0276             else
0277                 pattrib->mac_id = psta->mac_id;
0278         }
0279     }
0280 
0281     if (psta) {
0282         pattrib->psta = psta;
0283     } else {
0284         /* if we cannot get psta => drrp the pkt */
0285         return -ENOMEM;
0286     }
0287 
0288     pattrib->ack_policy = 0;
0289     /* get ether_hdr_len */
0290     pattrib->pkt_hdrlen = ETH_HLEN;
0291 
0292     if (pqospriv->qos_option) {
0293         r8712_set_qos(&pktfile, pattrib);
0294     } else {
0295         pattrib->hdrlen = WLAN_HDR_A3_LEN;
0296         pattrib->subtype = IEEE80211_FTYPE_DATA;
0297         pattrib->priority = 0;
0298     }
0299     if (psta->ieee8021x_blocked) {
0300         pattrib->encrypt = 0;
0301         if ((pattrib->ether_type != 0x888e) &&
0302             !check_fwstate(pmlmepriv, WIFI_MP_STATE))
0303             return -EINVAL;
0304     } else {
0305         GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, bmcast);
0306     }
0307     switch (pattrib->encrypt) {
0308     case _WEP40_:
0309     case _WEP104_:
0310         pattrib->iv_len = 4;
0311         pattrib->icv_len = 4;
0312         break;
0313     case _TKIP_:
0314         pattrib->iv_len = 8;
0315         pattrib->icv_len = 4;
0316         if (padapter->securitypriv.busetkipkey == _FAIL)
0317             return -EINVAL;
0318         break;
0319     case _AES_:
0320         pattrib->iv_len = 8;
0321         pattrib->icv_len = 8;
0322         break;
0323     default:
0324         pattrib->iv_len = 0;
0325         pattrib->icv_len = 0;
0326         break;
0327     }
0328 
0329     if (pattrib->encrypt &&
0330         (padapter->securitypriv.sw_encrypt ||
0331         !psecuritypriv->hw_decrypted))
0332         pattrib->bswenc = true;
0333     else
0334         pattrib->bswenc = false;
0335     /* if in MP_STATE, update pkt_attrib from mp_txcmd, and overwrite
0336      * some settings above.
0337      */
0338     if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
0339         pattrib->priority =
0340             (le32_to_cpu(txdesc.txdw1) >> QSEL_SHT) & 0x1f;
0341     return 0;
0342 }
0343 
0344 static int xmitframe_addmic(struct _adapter *padapter,
0345                 struct xmit_frame *pxmitframe)
0346 {
0347     u32 curfragnum, length;
0348     u8  *pframe, *payload, mic[8];
0349     struct  mic_data micdata;
0350     struct  sta_info *stainfo;
0351     struct  qos_priv *pqospriv = &(padapter->mlmepriv.qospriv);
0352     struct  pkt_attrib  *pattrib = &pxmitframe->attrib;
0353     struct  security_priv *psecpriv = &padapter->securitypriv;
0354     struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
0355     u8 priority[4] = {};
0356     bool bmcst = is_multicast_ether_addr(pattrib->ra);
0357 
0358     if (pattrib->psta)
0359         stainfo = pattrib->psta;
0360     else
0361         stainfo = r8712_get_stainfo(&padapter->stapriv,
0362                         &pattrib->ra[0]);
0363     if (pattrib->encrypt == _TKIP_) {
0364         /*encode mic code*/
0365         if (stainfo) {
0366             u8 null_key[16] = {};
0367 
0368             pframe = pxmitframe->buf_addr + TXDESC_OFFSET;
0369             if (bmcst) {
0370                 if (!memcmp(psecpriv->XGrptxmickey
0371                    [psecpriv->XGrpKeyid].skey,
0372                    null_key, 16))
0373                     return -ENOMEM;
0374                 /*start to calculate the mic code*/
0375                 r8712_secmicsetkey(&micdata,
0376                     psecpriv->XGrptxmickey
0377                     [psecpriv->XGrpKeyid].skey);
0378             } else {
0379                 if (!memcmp(&stainfo->tkiptxmickey.skey[0],
0380                         null_key, 16))
0381                     return -ENOMEM;
0382                 /* start to calculate the mic code */
0383                 r8712_secmicsetkey(&micdata,
0384                          &stainfo->tkiptxmickey.skey[0]);
0385             }
0386             if (pframe[1] & 1) {   /* ToDS==1 */
0387                 r8712_secmicappend(&micdata,
0388                            &pframe[16], 6); /*DA*/
0389                 if (pframe[1] & 2)  /* From Ds==1 */
0390                     r8712_secmicappend(&micdata,
0391                                &pframe[24], 6);
0392                 else
0393                     r8712_secmicappend(&micdata,
0394                                &pframe[10], 6);
0395             } else {    /* ToDS==0 */
0396                 r8712_secmicappend(&micdata,
0397                            &pframe[4], 6); /* DA */
0398                 if (pframe[1] & 2)  /* From Ds==1 */
0399                     r8712_secmicappend(&micdata,
0400                                &pframe[16], 6);
0401                 else
0402                     r8712_secmicappend(&micdata,
0403                                &pframe[10], 6);
0404             }
0405             if (pqospriv->qos_option == 1)
0406                 priority[0] = (u8)pxmitframe->attrib.priority;
0407             r8712_secmicappend(&micdata, &priority[0], 4);
0408             payload = pframe;
0409             for (curfragnum = 0; curfragnum < pattrib->nr_frags;
0410                  curfragnum++) {
0411                 payload = (u8 *)RND4((addr_t)(payload));
0412                 payload += pattrib->hdrlen + pattrib->iv_len;
0413                 if ((curfragnum + 1) == pattrib->nr_frags) {
0414                     length = pattrib->last_txcmdsz -
0415                           pattrib->hdrlen -
0416                           pattrib->iv_len -
0417                           ((psecpriv->sw_encrypt)
0418                           ? pattrib->icv_len : 0);
0419                     r8712_secmicappend(&micdata, payload,
0420                                length);
0421                     payload = payload + length;
0422                 } else {
0423                     length = pxmitpriv->frag_len -
0424                         pattrib->hdrlen - pattrib->iv_len -
0425                         ((psecpriv->sw_encrypt) ?
0426                         pattrib->icv_len : 0);
0427                     r8712_secmicappend(&micdata, payload,
0428                                length);
0429                     payload = payload + length +
0430                           pattrib->icv_len;
0431                 }
0432             }
0433             r8712_secgetmic(&micdata, &(mic[0]));
0434             /* add mic code  and add the mic code length in
0435              * last_txcmdsz
0436              */
0437             memcpy(payload, &(mic[0]), 8);
0438             pattrib->last_txcmdsz += 8;
0439             payload = payload - pattrib->last_txcmdsz + 8;
0440         }
0441     }
0442     return 0;
0443 }
0444 
0445 static sint xmitframe_swencrypt(struct _adapter *padapter,
0446                 struct xmit_frame *pxmitframe)
0447 {
0448     struct pkt_attrib   *pattrib = &pxmitframe->attrib;
0449 
0450     if (pattrib->bswenc) {
0451         switch (pattrib->encrypt) {
0452         case _WEP40_:
0453         case _WEP104_:
0454             r8712_wep_encrypt(padapter, (u8 *)pxmitframe);
0455             break;
0456         case _TKIP_:
0457             r8712_tkip_encrypt(padapter, (u8 *)pxmitframe);
0458             break;
0459         case _AES_:
0460             r8712_aes_encrypt(padapter, (u8 *)pxmitframe);
0461             break;
0462         default:
0463                 break;
0464         }
0465     }
0466     return _SUCCESS;
0467 }
0468 
0469 static int make_wlanhdr(struct _adapter *padapter, u8 *hdr,
0470             struct pkt_attrib *pattrib)
0471 {
0472     u16 *qc;
0473 
0474     struct ieee80211_hdr *pwlanhdr = (struct ieee80211_hdr *)hdr;
0475     struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
0476     struct qos_priv *pqospriv = &pmlmepriv->qospriv;
0477     __le16 *fctrl = &pwlanhdr->frame_control;
0478     u8 *bssid;
0479 
0480     memset(hdr, 0, WLANHDR_OFFSET);
0481     SetFrameSubType(fctrl, pattrib->subtype);
0482     if (!(pattrib->subtype & IEEE80211_FTYPE_DATA))
0483         return 0;
0484 
0485     bssid = get_bssid(pmlmepriv);
0486 
0487     if (check_fwstate(pmlmepriv,  WIFI_STATION_STATE)) {
0488         /* to_ds = 1, fr_ds = 0; */
0489         SetToDs(fctrl);
0490         ether_addr_copy(pwlanhdr->addr1, bssid);
0491         ether_addr_copy(pwlanhdr->addr2, pattrib->src);
0492         ether_addr_copy(pwlanhdr->addr3, pattrib->dst);
0493     } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
0494         /* to_ds = 0, fr_ds = 1; */
0495         SetFrDs(fctrl);
0496         ether_addr_copy(pwlanhdr->addr1, pattrib->dst);
0497         ether_addr_copy(pwlanhdr->addr2, bssid);
0498         ether_addr_copy(pwlanhdr->addr3, pattrib->src);
0499     } else if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
0500            check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
0501         ether_addr_copy(pwlanhdr->addr1, pattrib->dst);
0502         ether_addr_copy(pwlanhdr->addr2, pattrib->src);
0503         ether_addr_copy(pwlanhdr->addr3, bssid);
0504     } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
0505         ether_addr_copy(pwlanhdr->addr1, pattrib->dst);
0506         ether_addr_copy(pwlanhdr->addr2, pattrib->src);
0507         ether_addr_copy(pwlanhdr->addr3, bssid);
0508     } else {
0509         return -EINVAL;
0510     }
0511 
0512     if (pattrib->encrypt)
0513         SetPrivacy(fctrl);
0514     if (pqospriv->qos_option) {
0515         qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
0516         if (pattrib->priority)
0517             SetPriority(qc, pattrib->priority);
0518         SetAckpolicy(qc, pattrib->ack_policy);
0519     }
0520     /* TODO: fill HT Control Field */
0521     /* Update Seq Num will be handled by f/w */
0522     {
0523         struct sta_info *psta;
0524         bool bmcst = is_multicast_ether_addr(pattrib->ra);
0525 
0526         if (pattrib->psta)
0527             psta = pattrib->psta;
0528         else if (bmcst)
0529             psta = r8712_get_bcmc_stainfo(padapter);
0530         else
0531             psta = r8712_get_stainfo(&padapter->stapriv,
0532                          pattrib->ra);
0533 
0534         if (psta) {
0535             u16 *txtid = psta->sta_xmitpriv.txseq_tid;
0536 
0537             txtid[pattrib->priority]++;
0538             txtid[pattrib->priority] &= 0xFFF;
0539             pattrib->seqnum = txtid[pattrib->priority];
0540             SetSeqNum(hdr, pattrib->seqnum);
0541         }
0542     }
0543 
0544     return 0;
0545 }
0546 
0547 static sint r8712_put_snap(u8 *data, u16 h_proto)
0548 {
0549     struct ieee80211_snap_hdr *snap;
0550     const u8 *oui;
0551 
0552     snap = (struct ieee80211_snap_hdr *)data;
0553     snap->dsap = 0xaa;
0554     snap->ssap = 0xaa;
0555     snap->ctrl = 0x03;
0556     if (h_proto == 0x8137 || h_proto == 0x80f3)
0557         oui = P802_1H_OUI;
0558     else
0559         oui = RFC1042_OUI;
0560     snap->oui[0] = oui[0];
0561     snap->oui[1] = oui[1];
0562     snap->oui[2] = oui[2];
0563     *(__be16 *)(data + SNAP_SIZE) = htons(h_proto);
0564     return SNAP_SIZE + sizeof(u16);
0565 }
0566 
0567 /*
0568  * This sub-routine will perform all the following:
0569  * 1. remove 802.3 header.
0570  * 2. create wlan_header, based on the info in pxmitframe
0571  * 3. append sta's iv/ext-iv
0572  * 4. append LLC
0573  * 5. move frag chunk from pframe to pxmitframe->mem
0574  * 6. apply sw-encrypt, if necessary.
0575  */
0576 sint r8712_xmitframe_coalesce(struct _adapter *padapter, _pkt *pkt,
0577             struct xmit_frame *pxmitframe)
0578 {
0579     struct pkt_file pktfile;
0580 
0581     sint    frg_len, mpdu_len, llc_sz;
0582     u32 mem_sz;
0583     u8  frg_inx;
0584     addr_t addr;
0585     u8 *pframe, *mem_start, *ptxdesc;
0586     struct sta_info     *psta;
0587     struct security_priv    *psecpriv = &padapter->securitypriv;
0588     struct mlme_priv    *pmlmepriv = &padapter->mlmepriv;
0589     struct xmit_priv    *pxmitpriv = &padapter->xmitpriv;
0590     struct pkt_attrib   *pattrib = &pxmitframe->attrib;
0591     u8 *pbuf_start;
0592     bool bmcst = is_multicast_ether_addr(pattrib->ra);
0593 
0594     if (!pattrib->psta)
0595         return _FAIL;
0596     psta = pattrib->psta;
0597     if (!pxmitframe->buf_addr)
0598         return _FAIL;
0599     pbuf_start = pxmitframe->buf_addr;
0600     ptxdesc = pbuf_start;
0601     mem_start = pbuf_start + TXDESC_OFFSET;
0602     if (make_wlanhdr(padapter, mem_start, pattrib))
0603         return _FAIL;
0604     _r8712_open_pktfile(pkt, &pktfile);
0605     _r8712_pktfile_read(&pktfile, NULL, (uint) pattrib->pkt_hdrlen);
0606     if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
0607         /* truncate TXDESC_SIZE bytes txcmd if at mp mode for 871x */
0608         if (pattrib->ether_type == 0x8712) {
0609             /* take care -  update_txdesc overwrite this */
0610             _r8712_pktfile_read(&pktfile, ptxdesc, TXDESC_SIZE);
0611         }
0612     }
0613     pattrib->pktlen = pktfile.pkt_len;
0614     frg_inx = 0;
0615     frg_len = pxmitpriv->frag_len - 4;
0616     while (1) {
0617         llc_sz = 0;
0618         mpdu_len = frg_len;
0619         pframe = mem_start;
0620         SetMFrag(mem_start);
0621         pframe += pattrib->hdrlen;
0622         mpdu_len -= pattrib->hdrlen;
0623         /* adding icv, if necessary...*/
0624         if (pattrib->iv_len) {
0625             if (psta) {
0626                 switch (pattrib->encrypt) {
0627                 case _WEP40_:
0628                 case _WEP104_:
0629                     WEP_IV(pattrib->iv, psta->txpn,
0630                            (u8)psecpriv->PrivacyKeyIndex);
0631                     break;
0632                 case _TKIP_:
0633                     if (bmcst)
0634                         TKIP_IV(pattrib->iv,
0635                             psta->txpn,
0636                             (u8)psecpriv->XGrpKeyid);
0637                     else
0638                         TKIP_IV(pattrib->iv, psta->txpn,
0639                             0);
0640                     break;
0641                 case _AES_:
0642                     if (bmcst)
0643                         AES_IV(pattrib->iv, psta->txpn,
0644                             (u8)psecpriv->XGrpKeyid);
0645                     else
0646                         AES_IV(pattrib->iv, psta->txpn,
0647                                0);
0648                     break;
0649                 }
0650             }
0651             memcpy(pframe, pattrib->iv, pattrib->iv_len);
0652             pframe += pattrib->iv_len;
0653             mpdu_len -= pattrib->iv_len;
0654         }
0655         if (frg_inx == 0) {
0656             llc_sz = r8712_put_snap(pframe, pattrib->ether_type);
0657             pframe += llc_sz;
0658             mpdu_len -= llc_sz;
0659         }
0660         if ((pattrib->icv_len > 0) && (pattrib->bswenc))
0661             mpdu_len -= pattrib->icv_len;
0662         if (bmcst)
0663             mem_sz = _r8712_pktfile_read(&pktfile, pframe,
0664                  pattrib->pktlen);
0665         else
0666             mem_sz = _r8712_pktfile_read(&pktfile, pframe,
0667                  mpdu_len);
0668         pframe += mem_sz;
0669         if ((pattrib->icv_len > 0) && (pattrib->bswenc)) {
0670             memcpy(pframe, pattrib->icv, pattrib->icv_len);
0671             pframe += pattrib->icv_len;
0672         }
0673         frg_inx++;
0674         if (bmcst || r8712_endofpktfile(&pktfile)) {
0675             pattrib->nr_frags = frg_inx;
0676             pattrib->last_txcmdsz = pattrib->hdrlen +
0677                         pattrib->iv_len +
0678                         ((pattrib->nr_frags == 1) ?
0679                         llc_sz : 0) +
0680                         ((pattrib->bswenc) ?
0681                         pattrib->icv_len : 0) + mem_sz;
0682             ClearMFrag(mem_start);
0683             break;
0684         }
0685         addr = (addr_t)(pframe);
0686         mem_start = (unsigned char *)RND4(addr) + TXDESC_OFFSET;
0687         memcpy(mem_start, pbuf_start + TXDESC_OFFSET, pattrib->hdrlen);
0688     }
0689 
0690     if (xmitframe_addmic(padapter, pxmitframe))
0691         return _FAIL;
0692     xmitframe_swencrypt(padapter, pxmitframe);
0693     return _SUCCESS;
0694 }
0695 
0696 void r8712_update_protection(struct _adapter *padapter, u8 *ie, uint ie_len)
0697 {
0698     uint    protection;
0699     u8  *perp;
0700     uint    erp_len;
0701     struct  xmit_priv *pxmitpriv = &padapter->xmitpriv;
0702     struct  registry_priv *pregistrypriv = &padapter->registrypriv;
0703 
0704     switch (pxmitpriv->vcs_setting) {
0705     case DISABLE_VCS:
0706         pxmitpriv->vcs = NONE_VCS;
0707         break;
0708     case ENABLE_VCS:
0709         break;
0710     case AUTO_VCS:
0711     default:
0712         perp = r8712_get_ie(ie, WLAN_EID_ERP_INFO, &erp_len, ie_len);
0713         if (!perp) {
0714             pxmitpriv->vcs = NONE_VCS;
0715         } else {
0716             protection = (*(perp + 2)) & BIT(1);
0717             if (protection) {
0718                 if (pregistrypriv->vcs_type == RTS_CTS)
0719                     pxmitpriv->vcs = RTS_CTS;
0720                 else
0721                     pxmitpriv->vcs = CTS_TO_SELF;
0722             } else {
0723                 pxmitpriv->vcs = NONE_VCS;
0724             }
0725         }
0726         break;
0727     }
0728 }
0729 
0730 struct xmit_buf *r8712_alloc_xmitbuf(struct xmit_priv *pxmitpriv)
0731 {
0732     unsigned long irqL;
0733     struct xmit_buf *pxmitbuf;
0734     struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
0735 
0736     spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
0737     pxmitbuf = list_first_entry_or_null(&pfree_xmitbuf_queue->queue,
0738                         struct xmit_buf, list);
0739     if (pxmitbuf) {
0740         list_del_init(&pxmitbuf->list);
0741         pxmitpriv->free_xmitbuf_cnt--;
0742     }
0743     spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
0744     return pxmitbuf;
0745 }
0746 
0747 void r8712_free_xmitbuf(struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
0748 {
0749     unsigned long irqL;
0750     struct  __queue *pfree_xmitbuf_queue = &pxmitpriv->free_xmitbuf_queue;
0751 
0752     if (!pxmitbuf)
0753         return;
0754     spin_lock_irqsave(&pfree_xmitbuf_queue->lock, irqL);
0755     list_del_init(&pxmitbuf->list);
0756     list_add_tail(&(pxmitbuf->list), &pfree_xmitbuf_queue->queue);
0757     pxmitpriv->free_xmitbuf_cnt++;
0758     spin_unlock_irqrestore(&pfree_xmitbuf_queue->lock, irqL);
0759 }
0760 
0761 /*
0762  * Calling context:
0763  * 1. OS_TXENTRY
0764  * 2. RXENTRY (rx_thread or RX_ISR/RX_CallBack)
0765  *
0766  * If we turn on USE_RXTHREAD, then, no need for critical section.
0767  * Otherwise, we must use _enter/_exit critical to protect free_xmit_queue...
0768  *
0769  * Must be very very cautious...
0770  *
0771  */
0772 struct xmit_frame *r8712_alloc_xmitframe(struct xmit_priv *pxmitpriv)
0773 {
0774     /*
0775      * Please remember to use all the osdep_service api,
0776      * and lock/unlock or _enter/_exit critical to protect
0777      * pfree_xmit_queue
0778      */
0779     unsigned long irqL;
0780     struct xmit_frame *pxframe;
0781     struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
0782 
0783     spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
0784     pxframe = list_first_entry_or_null(&pfree_xmit_queue->queue,
0785                        struct xmit_frame, list);
0786     if (pxframe) {
0787         list_del_init(&pxframe->list);
0788         pxmitpriv->free_xmitframe_cnt--;
0789         pxframe->buf_addr = NULL;
0790         pxframe->pxmitbuf = NULL;
0791         pxframe->attrib.psta = NULL;
0792         pxframe->pkt = NULL;
0793     }
0794     spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
0795     return pxframe;
0796 }
0797 
0798 void r8712_free_xmitframe(struct xmit_priv *pxmitpriv,
0799               struct xmit_frame *pxmitframe)
0800 {
0801     unsigned long irqL;
0802     struct  __queue *pfree_xmit_queue = &pxmitpriv->free_xmit_queue;
0803     struct _adapter *padapter = pxmitpriv->adapter;
0804 
0805     if (!pxmitframe)
0806         return;
0807     spin_lock_irqsave(&pfree_xmit_queue->lock, irqL);
0808     list_del_init(&pxmitframe->list);
0809     if (pxmitframe->pkt)
0810         pxmitframe->pkt = NULL;
0811     list_add_tail(&pxmitframe->list, &pfree_xmit_queue->queue);
0812     pxmitpriv->free_xmitframe_cnt++;
0813     spin_unlock_irqrestore(&pfree_xmit_queue->lock, irqL);
0814     if (netif_queue_stopped(padapter->pnetdev))
0815         netif_wake_queue(padapter->pnetdev);
0816 }
0817 
0818 void r8712_free_xmitframe_ex(struct xmit_priv *pxmitpriv,
0819               struct xmit_frame *pxmitframe)
0820 {
0821     if (!pxmitframe)
0822         return;
0823     if (pxmitframe->frame_tag == DATA_FRAMETAG)
0824         r8712_free_xmitframe(pxmitpriv, pxmitframe);
0825 }
0826 
0827 void r8712_free_xmitframe_queue(struct xmit_priv *pxmitpriv,
0828                 struct  __queue *pframequeue)
0829 {
0830     unsigned long irqL;
0831     struct list_head *plist, *phead;
0832     struct  xmit_frame  *pxmitframe;
0833 
0834     spin_lock_irqsave(&(pframequeue->lock), irqL);
0835     phead = &pframequeue->queue;
0836     plist = phead->next;
0837     while (!end_of_queue_search(phead, plist)) {
0838         pxmitframe = container_of(plist, struct xmit_frame, list);
0839         plist = plist->next;
0840         r8712_free_xmitframe(pxmitpriv, pxmitframe);
0841     }
0842     spin_unlock_irqrestore(&(pframequeue->lock), irqL);
0843 }
0844 
0845 static inline struct tx_servq *get_sta_pending(struct _adapter *padapter,
0846                            struct  __queue **ppstapending,
0847                            struct sta_info *psta, sint up)
0848 {
0849     struct tx_servq *ptxservq;
0850     struct hw_xmit *phwxmits =  padapter->xmitpriv.hwxmits;
0851 
0852     switch (up) {
0853     case 1:
0854     case 2:
0855         ptxservq = &(psta->sta_xmitpriv.bk_q);
0856         *ppstapending = &padapter->xmitpriv.bk_pending;
0857         (phwxmits + 3)->accnt++;
0858         break;
0859     case 4:
0860     case 5:
0861         ptxservq = &(psta->sta_xmitpriv.vi_q);
0862         *ppstapending = &padapter->xmitpriv.vi_pending;
0863         (phwxmits + 1)->accnt++;
0864         break;
0865     case 6:
0866     case 7:
0867         ptxservq = &(psta->sta_xmitpriv.vo_q);
0868         *ppstapending = &padapter->xmitpriv.vo_pending;
0869         (phwxmits + 0)->accnt++;
0870         break;
0871     case 0:
0872     case 3:
0873     default:
0874         ptxservq = &(psta->sta_xmitpriv.be_q);
0875         *ppstapending = &padapter->xmitpriv.be_pending;
0876         (phwxmits + 2)->accnt++;
0877         break;
0878     }
0879     return ptxservq;
0880 }
0881 
0882 /*
0883  * Will enqueue pxmitframe to the proper queue, and indicate it
0884  * to xx_pending list.....
0885  */
0886 int r8712_xmit_classifier(struct _adapter *padapter,
0887               struct xmit_frame *pxmitframe)
0888 {
0889     unsigned long irqL0;
0890     struct  __queue *pstapending;
0891     struct sta_info *psta;
0892     struct tx_servq *ptxservq;
0893     struct pkt_attrib *pattrib = &pxmitframe->attrib;
0894     struct sta_priv *pstapriv = &padapter->stapriv;
0895     struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
0896     bool bmcst = is_multicast_ether_addr(pattrib->ra);
0897 
0898     if (pattrib->psta) {
0899         psta = pattrib->psta;
0900     } else {
0901         if (bmcst) {
0902             psta = r8712_get_bcmc_stainfo(padapter);
0903         } else {
0904             if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
0905                 psta = r8712_get_stainfo(pstapriv,
0906                        get_bssid(pmlmepriv));
0907             else
0908                 psta = r8712_get_stainfo(pstapriv, pattrib->ra);
0909         }
0910     }
0911     if (!psta)
0912         return -EINVAL;
0913     ptxservq = get_sta_pending(padapter, &pstapending,
0914            psta, pattrib->priority);
0915     spin_lock_irqsave(&pstapending->lock, irqL0);
0916     if (list_empty(&ptxservq->tx_pending))
0917         list_add_tail(&ptxservq->tx_pending, &pstapending->queue);
0918     list_add_tail(&pxmitframe->list, &ptxservq->sta_pending.queue);
0919     ptxservq->qcnt++;
0920     spin_unlock_irqrestore(&pstapending->lock, irqL0);
0921     return 0;
0922 }
0923 
0924 static void alloc_hwxmits(struct _adapter *padapter)
0925 {
0926     struct hw_xmit *hwxmits;
0927     struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
0928 
0929     pxmitpriv->hwxmit_entry = HWXMIT_ENTRY;
0930     pxmitpriv->hwxmits = kmalloc_array(pxmitpriv->hwxmit_entry,
0931                 sizeof(struct hw_xmit), GFP_ATOMIC);
0932     if (!pxmitpriv->hwxmits)
0933         return;
0934     hwxmits = pxmitpriv->hwxmits;
0935     if (pxmitpriv->hwxmit_entry == 5) {
0936         pxmitpriv->bmc_txqueue.head = 0;
0937         hwxmits[0] .phwtxqueue = &pxmitpriv->bmc_txqueue;
0938         hwxmits[0] .sta_queue = &pxmitpriv->bm_pending;
0939         pxmitpriv->vo_txqueue.head = 0;
0940         hwxmits[1] .phwtxqueue = &pxmitpriv->vo_txqueue;
0941         hwxmits[1] .sta_queue = &pxmitpriv->vo_pending;
0942         pxmitpriv->vi_txqueue.head = 0;
0943         hwxmits[2] .phwtxqueue = &pxmitpriv->vi_txqueue;
0944         hwxmits[2] .sta_queue = &pxmitpriv->vi_pending;
0945         pxmitpriv->bk_txqueue.head = 0;
0946         hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
0947         hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
0948         pxmitpriv->be_txqueue.head = 0;
0949         hwxmits[4] .phwtxqueue = &pxmitpriv->be_txqueue;
0950         hwxmits[4] .sta_queue = &pxmitpriv->be_pending;
0951     } else if (pxmitpriv->hwxmit_entry == 4) {
0952         pxmitpriv->vo_txqueue.head = 0;
0953         hwxmits[0] .phwtxqueue = &pxmitpriv->vo_txqueue;
0954         hwxmits[0] .sta_queue = &pxmitpriv->vo_pending;
0955         pxmitpriv->vi_txqueue.head = 0;
0956         hwxmits[1] .phwtxqueue = &pxmitpriv->vi_txqueue;
0957         hwxmits[1] .sta_queue = &pxmitpriv->vi_pending;
0958         pxmitpriv->be_txqueue.head = 0;
0959         hwxmits[2] .phwtxqueue = &pxmitpriv->be_txqueue;
0960         hwxmits[2] .sta_queue = &pxmitpriv->be_pending;
0961         pxmitpriv->bk_txqueue.head = 0;
0962         hwxmits[3] .phwtxqueue = &pxmitpriv->bk_txqueue;
0963         hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
0964     }
0965 }
0966 
0967 static void free_hwxmits(struct _adapter *padapter)
0968 {
0969     struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
0970 
0971     kfree(pxmitpriv->hwxmits);
0972 }
0973 
0974 static void init_hwxmits(struct hw_xmit *phwxmit, sint entry)
0975 {
0976     sint i;
0977 
0978     for (i = 0; i < entry; i++, phwxmit++) {
0979         spin_lock_init(&phwxmit->xmit_lock);
0980         INIT_LIST_HEAD(&phwxmit->pending);
0981         phwxmit->txcmdcnt = 0;
0982         phwxmit->accnt = 0;
0983     }
0984 }
0985 
0986 void xmitframe_xmitbuf_attach(struct xmit_frame *pxmitframe,
0987             struct xmit_buf *pxmitbuf)
0988 {
0989     /* pxmitbuf attach to pxmitframe */
0990     pxmitframe->pxmitbuf = pxmitbuf;
0991     /* urb and irp connection */
0992     pxmitframe->pxmit_urb[0] = pxmitbuf->pxmit_urb[0];
0993     /* buffer addr assoc */
0994     pxmitframe->buf_addr = pxmitbuf->pbuf;
0995     /* pxmitframe attach to pxmitbuf */
0996     pxmitbuf->priv_data = pxmitframe;
0997 }
0998 
0999 /*
1000  * tx_action == 0 == no frames to transmit
1001  * tx_action > 0 ==> we have frames to transmit
1002  * tx_action < 0 ==> we have frames to transmit, but TXFF is not even enough
1003  *                       to transmit 1 frame.
1004  */
1005 
1006 int r8712_pre_xmit(struct _adapter *padapter, struct xmit_frame *pxmitframe)
1007 {
1008     unsigned long irqL;
1009     int ret;
1010     struct xmit_buf *pxmitbuf = NULL;
1011     struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
1012     struct pkt_attrib *pattrib = &pxmitframe->attrib;
1013 
1014     r8712_do_queue_select(padapter, pattrib);
1015     spin_lock_irqsave(&pxmitpriv->lock, irqL);
1016     if (r8712_txframes_sta_ac_pending(padapter, pattrib) > 0) {
1017         ret = false;
1018         r8712_xmit_enqueue(padapter, pxmitframe);
1019         spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1020         return ret;
1021     }
1022     pxmitbuf = r8712_alloc_xmitbuf(pxmitpriv);
1023     if (!pxmitbuf) { /*enqueue packet*/
1024         ret = false;
1025         r8712_xmit_enqueue(padapter, pxmitframe);
1026         spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1027     } else { /*dump packet directly*/
1028         spin_unlock_irqrestore(&pxmitpriv->lock, irqL);
1029         ret = true;
1030         xmitframe_xmitbuf_attach(pxmitframe, pxmitbuf);
1031         r8712_xmit_direct(padapter, pxmitframe);
1032     }
1033     return ret;
1034 }
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