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0001 /*
0002  * Copyright (c) 2004-2011 Atheros Communications Inc.
0003  * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
0004  *
0005  * Permission to use, copy, modify, and/or distribute this software for any
0006  * purpose with or without fee is hereby granted, provided that the above
0007  * copyright notice and this permission notice appear in all copies.
0008  *
0009  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
0010  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
0011  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
0012  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
0013  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
0014  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
0015  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
0016  */
0017 
0018 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0019 
0020 #include "core.h"
0021 #include "hif-ops.h"
0022 #include "cfg80211.h"
0023 #include "target.h"
0024 #include "debug.h"
0025 
0026 struct ath6kl_sta *ath6kl_find_sta(struct ath6kl_vif *vif, u8 *node_addr)
0027 {
0028     struct ath6kl *ar = vif->ar;
0029     struct ath6kl_sta *conn = NULL;
0030     u8 i, max_conn;
0031 
0032     if (is_zero_ether_addr(node_addr))
0033         return NULL;
0034 
0035     max_conn = (vif->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0;
0036 
0037     for (i = 0; i < max_conn; i++) {
0038         if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) {
0039             conn = &ar->sta_list[i];
0040             break;
0041         }
0042     }
0043 
0044     return conn;
0045 }
0046 
0047 struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid)
0048 {
0049     struct ath6kl_sta *conn = NULL;
0050     u8 ctr;
0051 
0052     for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) {
0053         if (ar->sta_list[ctr].aid == aid) {
0054             conn = &ar->sta_list[ctr];
0055             break;
0056         }
0057     }
0058     return conn;
0059 }
0060 
0061 static void ath6kl_add_new_sta(struct ath6kl_vif *vif, u8 *mac, u16 aid,
0062                    u8 *wpaie, size_t ielen, u8 keymgmt,
0063                    u8 ucipher, u8 auth, u8 apsd_info)
0064 {
0065     struct ath6kl *ar = vif->ar;
0066     struct ath6kl_sta *sta;
0067     u8 free_slot;
0068 
0069     free_slot = aid - 1;
0070 
0071     sta = &ar->sta_list[free_slot];
0072     memcpy(sta->mac, mac, ETH_ALEN);
0073     if (ielen <= ATH6KL_MAX_IE)
0074         memcpy(sta->wpa_ie, wpaie, ielen);
0075     sta->aid = aid;
0076     sta->keymgmt = keymgmt;
0077     sta->ucipher = ucipher;
0078     sta->auth = auth;
0079     sta->apsd_info = apsd_info;
0080 
0081     ar->sta_list_index = ar->sta_list_index | (1 << free_slot);
0082     ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid);
0083     aggr_conn_init(vif, vif->aggr_cntxt, sta->aggr_conn);
0084 }
0085 
0086 static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i)
0087 {
0088     struct ath6kl_sta *sta = &ar->sta_list[i];
0089     struct ath6kl_mgmt_buff *entry, *tmp;
0090 
0091     /* empty the queued pkts in the PS queue if any */
0092     spin_lock_bh(&sta->psq_lock);
0093     skb_queue_purge(&sta->psq);
0094     skb_queue_purge(&sta->apsdq);
0095 
0096     if (sta->mgmt_psq_len != 0) {
0097         list_for_each_entry_safe(entry, tmp, &sta->mgmt_psq, list) {
0098             kfree(entry);
0099         }
0100         INIT_LIST_HEAD(&sta->mgmt_psq);
0101         sta->mgmt_psq_len = 0;
0102     }
0103 
0104     spin_unlock_bh(&sta->psq_lock);
0105 
0106     memset(&ar->ap_stats.sta[sta->aid - 1], 0,
0107            sizeof(struct wmi_per_sta_stat));
0108     eth_zero_addr(sta->mac);
0109     memset(sta->wpa_ie, 0, ATH6KL_MAX_IE);
0110     sta->aid = 0;
0111     sta->sta_flags = 0;
0112 
0113     ar->sta_list_index = ar->sta_list_index & ~(1 << i);
0114     aggr_reset_state(sta->aggr_conn);
0115 }
0116 
0117 static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason)
0118 {
0119     u8 i, removed = 0;
0120 
0121     if (is_zero_ether_addr(mac))
0122         return removed;
0123 
0124     if (is_broadcast_ether_addr(mac)) {
0125         ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n");
0126 
0127         for (i = 0; i < AP_MAX_NUM_STA; i++) {
0128             if (!is_zero_ether_addr(ar->sta_list[i].mac)) {
0129                 ath6kl_sta_cleanup(ar, i);
0130                 removed = 1;
0131             }
0132         }
0133     } else {
0134         for (i = 0; i < AP_MAX_NUM_STA; i++) {
0135             if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) {
0136                 ath6kl_dbg(ATH6KL_DBG_TRC,
0137                        "deleting station %pM aid=%d reason=%d\n",
0138                        mac, ar->sta_list[i].aid, reason);
0139                 ath6kl_sta_cleanup(ar, i);
0140                 removed = 1;
0141                 break;
0142             }
0143         }
0144     }
0145 
0146     return removed;
0147 }
0148 
0149 enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac)
0150 {
0151     struct ath6kl *ar = devt;
0152     return ar->ac2ep_map[ac];
0153 }
0154 
0155 struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar)
0156 {
0157     struct ath6kl_cookie *cookie;
0158 
0159     cookie = ar->cookie_list;
0160     if (cookie != NULL) {
0161         ar->cookie_list = cookie->arc_list_next;
0162         ar->cookie_count--;
0163     }
0164 
0165     return cookie;
0166 }
0167 
0168 void ath6kl_cookie_init(struct ath6kl *ar)
0169 {
0170     u32 i;
0171 
0172     ar->cookie_list = NULL;
0173     ar->cookie_count = 0;
0174 
0175     memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem));
0176 
0177     for (i = 0; i < MAX_COOKIE_NUM; i++)
0178         ath6kl_free_cookie(ar, &ar->cookie_mem[i]);
0179 }
0180 
0181 void ath6kl_cookie_cleanup(struct ath6kl *ar)
0182 {
0183     ar->cookie_list = NULL;
0184     ar->cookie_count = 0;
0185 }
0186 
0187 void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie)
0188 {
0189     /* Insert first */
0190 
0191     if (!ar || !cookie)
0192         return;
0193 
0194     cookie->arc_list_next = ar->cookie_list;
0195     ar->cookie_list = cookie;
0196     ar->cookie_count++;
0197 }
0198 
0199 /*
0200  * Read from the hardware through its diagnostic window. No cooperation
0201  * from the firmware is required for this.
0202  */
0203 int ath6kl_diag_read32(struct ath6kl *ar, u32 address, u32 *value)
0204 {
0205     int ret;
0206 
0207     ret = ath6kl_hif_diag_read32(ar, address, value);
0208     if (ret) {
0209         ath6kl_warn("failed to read32 through diagnose window: %d\n",
0210                 ret);
0211         return ret;
0212     }
0213 
0214     return 0;
0215 }
0216 
0217 /*
0218  * Write to the ATH6KL through its diagnostic window. No cooperation from
0219  * the Target is required for this.
0220  */
0221 int ath6kl_diag_write32(struct ath6kl *ar, u32 address, __le32 value)
0222 {
0223     int ret;
0224 
0225     ret = ath6kl_hif_diag_write32(ar, address, value);
0226 
0227     if (ret) {
0228         ath6kl_err("failed to write 0x%x during diagnose window to 0x%x\n",
0229                address, value);
0230         return ret;
0231     }
0232 
0233     return 0;
0234 }
0235 
0236 int ath6kl_diag_read(struct ath6kl *ar, u32 address, void *data, u32 length)
0237 {
0238     u32 count, *buf = data;
0239     int ret;
0240 
0241     if (WARN_ON(length % 4))
0242         return -EINVAL;
0243 
0244     for (count = 0; count < length / 4; count++, address += 4) {
0245         ret = ath6kl_diag_read32(ar, address, &buf[count]);
0246         if (ret)
0247             return ret;
0248     }
0249 
0250     return 0;
0251 }
0252 
0253 int ath6kl_diag_write(struct ath6kl *ar, u32 address, void *data, u32 length)
0254 {
0255     u32 count;
0256     __le32 *buf = data;
0257     int ret;
0258 
0259     if (WARN_ON(length % 4))
0260         return -EINVAL;
0261 
0262     for (count = 0; count < length / 4; count++, address += 4) {
0263         ret = ath6kl_diag_write32(ar, address, buf[count]);
0264         if (ret)
0265             return ret;
0266     }
0267 
0268     return 0;
0269 }
0270 
0271 int ath6kl_read_fwlogs(struct ath6kl *ar)
0272 {
0273     struct ath6kl_dbglog_hdr debug_hdr;
0274     struct ath6kl_dbglog_buf debug_buf;
0275     u32 address, length, firstbuf, debug_hdr_addr;
0276     int ret, loop;
0277     u8 *buf;
0278 
0279     buf = kmalloc(ATH6KL_FWLOG_PAYLOAD_SIZE, GFP_KERNEL);
0280     if (!buf)
0281         return -ENOMEM;
0282 
0283     address = TARG_VTOP(ar->target_type,
0284                 ath6kl_get_hi_item_addr(ar,
0285                             HI_ITEM(hi_dbglog_hdr)));
0286 
0287     ret = ath6kl_diag_read32(ar, address, &debug_hdr_addr);
0288     if (ret)
0289         goto out;
0290 
0291     /* Get the contents of the ring buffer */
0292     if (debug_hdr_addr == 0) {
0293         ath6kl_warn("Invalid address for debug_hdr_addr\n");
0294         ret = -EINVAL;
0295         goto out;
0296     }
0297 
0298     address = TARG_VTOP(ar->target_type, debug_hdr_addr);
0299     ret = ath6kl_diag_read(ar, address, &debug_hdr, sizeof(debug_hdr));
0300     if (ret)
0301         goto out;
0302 
0303     address = TARG_VTOP(ar->target_type,
0304                 le32_to_cpu(debug_hdr.dbuf_addr));
0305     firstbuf = address;
0306     ret = ath6kl_diag_read(ar, address, &debug_buf, sizeof(debug_buf));
0307     if (ret)
0308         goto out;
0309 
0310     loop = 100;
0311 
0312     do {
0313         address = TARG_VTOP(ar->target_type,
0314                     le32_to_cpu(debug_buf.buffer_addr));
0315         length = le32_to_cpu(debug_buf.length);
0316 
0317         if (length != 0 && (le32_to_cpu(debug_buf.length) <=
0318                     le32_to_cpu(debug_buf.bufsize))) {
0319             length = ALIGN(length, 4);
0320 
0321             ret = ath6kl_diag_read(ar, address,
0322                            buf, length);
0323             if (ret)
0324                 goto out;
0325 
0326             ath6kl_debug_fwlog_event(ar, buf, length);
0327         }
0328 
0329         address = TARG_VTOP(ar->target_type,
0330                     le32_to_cpu(debug_buf.next));
0331         ret = ath6kl_diag_read(ar, address, &debug_buf,
0332                        sizeof(debug_buf));
0333         if (ret)
0334             goto out;
0335 
0336         loop--;
0337 
0338         if (WARN_ON(loop == 0)) {
0339             ret = -ETIMEDOUT;
0340             goto out;
0341         }
0342     } while (address != firstbuf);
0343 
0344 out:
0345     kfree(buf);
0346 
0347     return ret;
0348 }
0349 
0350 static void ath6kl_install_static_wep_keys(struct ath6kl_vif *vif)
0351 {
0352     u8 index;
0353     u8 keyusage;
0354 
0355     for (index = 0; index <= WMI_MAX_KEY_INDEX; index++) {
0356         if (vif->wep_key_list[index].key_len) {
0357             keyusage = GROUP_USAGE;
0358             if (index == vif->def_txkey_index)
0359                 keyusage |= TX_USAGE;
0360 
0361             ath6kl_wmi_addkey_cmd(vif->ar->wmi, vif->fw_vif_idx,
0362                           index,
0363                           WEP_CRYPT,
0364                           keyusage,
0365                           vif->wep_key_list[index].key_len,
0366                           NULL, 0,
0367                           vif->wep_key_list[index].key,
0368                           KEY_OP_INIT_VAL, NULL,
0369                           NO_SYNC_WMIFLAG);
0370         }
0371     }
0372 }
0373 
0374 void ath6kl_connect_ap_mode_bss(struct ath6kl_vif *vif, u16 channel)
0375 {
0376     struct ath6kl *ar = vif->ar;
0377     struct ath6kl_req_key *ik;
0378     int res;
0379     u8 key_rsc[ATH6KL_KEY_SEQ_LEN];
0380 
0381     ik = &ar->ap_mode_bkey;
0382 
0383     ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "AP mode started on %u MHz\n", channel);
0384 
0385     switch (vif->auth_mode) {
0386     case NONE_AUTH:
0387         if (vif->prwise_crypto == WEP_CRYPT)
0388             ath6kl_install_static_wep_keys(vif);
0389         if (!ik->valid || ik->key_type != WAPI_CRYPT)
0390             break;
0391         /* for WAPI, we need to set the delayed group key, continue: */
0392         fallthrough;
0393     case WPA_PSK_AUTH:
0394     case WPA2_PSK_AUTH:
0395     case (WPA_PSK_AUTH | WPA2_PSK_AUTH):
0396         if (!ik->valid)
0397             break;
0398 
0399         ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
0400                "Delayed addkey for the initial group key for AP mode\n");
0401         memset(key_rsc, 0, sizeof(key_rsc));
0402         res = ath6kl_wmi_addkey_cmd(
0403             ar->wmi, vif->fw_vif_idx, ik->key_index, ik->key_type,
0404             GROUP_USAGE, ik->key_len, key_rsc, ATH6KL_KEY_SEQ_LEN,
0405             ik->key,
0406             KEY_OP_INIT_VAL, NULL, SYNC_BOTH_WMIFLAG);
0407         if (res) {
0408             ath6kl_dbg(ATH6KL_DBG_WLAN_CFG,
0409                    "Delayed addkey failed: %d\n", res);
0410         }
0411         break;
0412     }
0413 
0414     if (ar->last_ch != channel)
0415         /* we actually don't know the phymode, default to HT20 */
0416         ath6kl_cfg80211_ch_switch_notify(vif, channel, WMI_11G_HT20);
0417 
0418     ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx, NONE_BSS_FILTER, 0);
0419     set_bit(CONNECTED, &vif->flags);
0420     netif_carrier_on(vif->ndev);
0421 }
0422 
0423 void ath6kl_connect_ap_mode_sta(struct ath6kl_vif *vif, u16 aid, u8 *mac_addr,
0424                 u8 keymgmt, u8 ucipher, u8 auth,
0425                 u8 assoc_req_len, u8 *assoc_info, u8 apsd_info)
0426 {
0427     u8 *ies = NULL, *wpa_ie = NULL, *pos;
0428     size_t ies_len = 0;
0429     struct station_info *sinfo;
0430 
0431     ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", mac_addr, aid);
0432 
0433     if (aid < 1 || aid > AP_MAX_NUM_STA)
0434         return;
0435 
0436     if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
0437         struct ieee80211_mgmt *mgmt =
0438             (struct ieee80211_mgmt *) assoc_info;
0439         if (ieee80211_is_assoc_req(mgmt->frame_control) &&
0440             assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) +
0441             sizeof(mgmt->u.assoc_req)) {
0442             ies = mgmt->u.assoc_req.variable;
0443             ies_len = assoc_info + assoc_req_len - ies;
0444         } else if (ieee80211_is_reassoc_req(mgmt->frame_control) &&
0445                assoc_req_len >= sizeof(struct ieee80211_hdr_3addr)
0446                + sizeof(mgmt->u.reassoc_req)) {
0447             ies = mgmt->u.reassoc_req.variable;
0448             ies_len = assoc_info + assoc_req_len - ies;
0449         }
0450     }
0451 
0452     pos = ies;
0453     while (pos && pos + 1 < ies + ies_len) {
0454         if (pos + 2 + pos[1] > ies + ies_len)
0455             break;
0456         if (pos[0] == WLAN_EID_RSN)
0457             wpa_ie = pos; /* RSN IE */
0458         else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC &&
0459              pos[1] >= 4 &&
0460              pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) {
0461             if (pos[5] == 0x01)
0462                 wpa_ie = pos; /* WPA IE */
0463             else if (pos[5] == 0x04) {
0464                 wpa_ie = pos; /* WPS IE */
0465                 break; /* overrides WPA/RSN IE */
0466             }
0467         } else if (pos[0] == 0x44 && wpa_ie == NULL) {
0468             /*
0469              * Note: WAPI Parameter Set IE re-uses Element ID that
0470              * was officially allocated for BSS AC Access Delay. As
0471              * such, we need to be a bit more careful on when
0472              * parsing the frame. However, BSS AC Access Delay
0473              * element is not supposed to be included in
0474              * (Re)Association Request frames, so this should not
0475              * cause problems.
0476              */
0477             wpa_ie = pos; /* WAPI IE */
0478             break;
0479         }
0480         pos += 2 + pos[1];
0481     }
0482 
0483     ath6kl_add_new_sta(vif, mac_addr, aid, wpa_ie,
0484                wpa_ie ? 2 + wpa_ie[1] : 0,
0485                keymgmt, ucipher, auth, apsd_info);
0486 
0487     /* send event to application */
0488     sinfo = kzalloc(sizeof(*sinfo), GFP_KERNEL);
0489     if (!sinfo)
0490         return;
0491 
0492     /* TODO: sinfo.generation */
0493 
0494     sinfo->assoc_req_ies = ies;
0495     sinfo->assoc_req_ies_len = ies_len;
0496 
0497     cfg80211_new_sta(vif->ndev, mac_addr, sinfo, GFP_KERNEL);
0498 
0499     netif_wake_queue(vif->ndev);
0500 
0501     kfree(sinfo);
0502 }
0503 
0504 void disconnect_timer_handler(struct timer_list *t)
0505 {
0506     struct ath6kl_vif *vif = from_timer(vif, t, disconnect_timer);
0507 
0508     ath6kl_init_profile_info(vif);
0509     ath6kl_disconnect(vif);
0510 }
0511 
0512 void ath6kl_disconnect(struct ath6kl_vif *vif)
0513 {
0514     if (test_bit(CONNECTED, &vif->flags) ||
0515         test_bit(CONNECT_PEND, &vif->flags)) {
0516         ath6kl_wmi_disconnect_cmd(vif->ar->wmi, vif->fw_vif_idx);
0517         /*
0518          * Disconnect command is issued, clear the connect pending
0519          * flag. The connected flag will be cleared in
0520          * disconnect event notification.
0521          */
0522         clear_bit(CONNECT_PEND, &vif->flags);
0523     }
0524 }
0525 
0526 /* WMI Event handlers */
0527 
0528 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver,
0529             enum wmi_phy_cap cap)
0530 {
0531     struct ath6kl *ar = devt;
0532 
0533     memcpy(ar->mac_addr, datap, ETH_ALEN);
0534 
0535     ath6kl_dbg(ATH6KL_DBG_BOOT,
0536            "ready event mac addr %pM sw_ver 0x%x abi_ver 0x%x cap 0x%x\n",
0537            ar->mac_addr, sw_ver, abi_ver, cap);
0538 
0539     ar->version.wlan_ver = sw_ver;
0540     ar->version.abi_ver = abi_ver;
0541     ar->hw.cap = cap;
0542 
0543     if (strlen(ar->wiphy->fw_version) == 0) {
0544         snprintf(ar->wiphy->fw_version,
0545              sizeof(ar->wiphy->fw_version),
0546              "%u.%u.%u.%u",
0547              (ar->version.wlan_ver & 0xf0000000) >> 28,
0548              (ar->version.wlan_ver & 0x0f000000) >> 24,
0549              (ar->version.wlan_ver & 0x00ff0000) >> 16,
0550              (ar->version.wlan_ver & 0x0000ffff));
0551     }
0552 
0553     /* indicate to the waiting thread that the ready event was received */
0554     set_bit(WMI_READY, &ar->flag);
0555     wake_up(&ar->event_wq);
0556 }
0557 
0558 void ath6kl_scan_complete_evt(struct ath6kl_vif *vif, int status)
0559 {
0560     struct ath6kl *ar = vif->ar;
0561     bool aborted = false;
0562 
0563     if (status != WMI_SCAN_STATUS_SUCCESS)
0564         aborted = true;
0565 
0566     ath6kl_cfg80211_scan_complete_event(vif, aborted);
0567 
0568     if (!ar->usr_bss_filter) {
0569         clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
0570         ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
0571                      NONE_BSS_FILTER, 0);
0572     }
0573 
0574     ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "scan complete: %d\n", status);
0575 }
0576 
0577 static int ath6kl_commit_ch_switch(struct ath6kl_vif *vif, u16 channel)
0578 {
0579     struct ath6kl *ar = vif->ar;
0580 
0581     vif->profile.ch = cpu_to_le16(channel);
0582 
0583     switch (vif->nw_type) {
0584     case AP_NETWORK:
0585         /*
0586          * reconfigure any saved RSN IE capabilites in the beacon /
0587          * probe response to stay in sync with the supplicant.
0588          */
0589         if (vif->rsn_capab &&
0590             test_bit(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE,
0591                  ar->fw_capabilities))
0592             ath6kl_wmi_set_ie_cmd(ar->wmi, vif->fw_vif_idx,
0593                           WLAN_EID_RSN, WMI_RSN_IE_CAPB,
0594                           (const u8 *) &vif->rsn_capab,
0595                           sizeof(vif->rsn_capab));
0596 
0597         return ath6kl_wmi_ap_profile_commit(ar->wmi, vif->fw_vif_idx,
0598                             &vif->profile);
0599     default:
0600         ath6kl_err("won't switch channels nw_type=%d\n", vif->nw_type);
0601         return -ENOTSUPP;
0602     }
0603 }
0604 
0605 static void ath6kl_check_ch_switch(struct ath6kl *ar, u16 channel)
0606 {
0607     struct ath6kl_vif *vif;
0608     int res = 0;
0609 
0610     if (!ar->want_ch_switch)
0611         return;
0612 
0613     spin_lock_bh(&ar->list_lock);
0614     list_for_each_entry(vif, &ar->vif_list, list) {
0615         if (ar->want_ch_switch & (1 << vif->fw_vif_idx))
0616             res = ath6kl_commit_ch_switch(vif, channel);
0617 
0618         /* if channel switch failed, oh well we tried */
0619         ar->want_ch_switch &= ~(1 << vif->fw_vif_idx);
0620 
0621         if (res)
0622             ath6kl_err("channel switch failed nw_type %d res %d\n",
0623                    vif->nw_type, res);
0624     }
0625     spin_unlock_bh(&ar->list_lock);
0626 }
0627 
0628 void ath6kl_connect_event(struct ath6kl_vif *vif, u16 channel, u8 *bssid,
0629               u16 listen_int, u16 beacon_int,
0630               enum network_type net_type, u8 beacon_ie_len,
0631               u8 assoc_req_len, u8 assoc_resp_len,
0632               u8 *assoc_info)
0633 {
0634     struct ath6kl *ar = vif->ar;
0635 
0636     ath6kl_cfg80211_connect_event(vif, channel, bssid,
0637                       listen_int, beacon_int,
0638                       net_type, beacon_ie_len,
0639                       assoc_req_len, assoc_resp_len,
0640                       assoc_info);
0641 
0642     memcpy(vif->bssid, bssid, sizeof(vif->bssid));
0643     vif->bss_ch = channel;
0644 
0645     if (vif->nw_type == INFRA_NETWORK) {
0646         ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx,
0647                           vif->listen_intvl_t, 0);
0648         ath6kl_check_ch_switch(ar, channel);
0649     }
0650 
0651     netif_wake_queue(vif->ndev);
0652 
0653     /* Update connect & link status atomically */
0654     spin_lock_bh(&vif->if_lock);
0655     set_bit(CONNECTED, &vif->flags);
0656     clear_bit(CONNECT_PEND, &vif->flags);
0657     netif_carrier_on(vif->ndev);
0658     spin_unlock_bh(&vif->if_lock);
0659 
0660     aggr_reset_state(vif->aggr_cntxt->aggr_conn);
0661     vif->reconnect_flag = 0;
0662 
0663     if ((vif->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) {
0664         memset(ar->node_map, 0, sizeof(ar->node_map));
0665         ar->node_num = 0;
0666         ar->next_ep_id = ENDPOINT_2;
0667     }
0668 
0669     if (!ar->usr_bss_filter) {
0670         set_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags);
0671         ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
0672                      CURRENT_BSS_FILTER, 0);
0673     }
0674 }
0675 
0676 void ath6kl_tkip_micerr_event(struct ath6kl_vif *vif, u8 keyid, bool ismcast)
0677 {
0678     struct ath6kl_sta *sta;
0679     struct ath6kl *ar = vif->ar;
0680     u8 tsc[6];
0681 
0682     /*
0683      * For AP case, keyid will have aid of STA which sent pkt with
0684      * MIC error. Use this aid to get MAC & send it to hostapd.
0685      */
0686     if (vif->nw_type == AP_NETWORK) {
0687         sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2));
0688         if (!sta)
0689             return;
0690 
0691         ath6kl_dbg(ATH6KL_DBG_TRC,
0692                "ap tkip mic error received from aid=%d\n", keyid);
0693 
0694         memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */
0695         cfg80211_michael_mic_failure(vif->ndev, sta->mac,
0696                          NL80211_KEYTYPE_PAIRWISE, keyid,
0697                          tsc, GFP_KERNEL);
0698     } else {
0699         ath6kl_cfg80211_tkip_micerr_event(vif, keyid, ismcast);
0700     }
0701 }
0702 
0703 static void ath6kl_update_target_stats(struct ath6kl_vif *vif, u8 *ptr, u32 len)
0704 {
0705     struct wmi_target_stats *tgt_stats =
0706         (struct wmi_target_stats *) ptr;
0707     struct ath6kl *ar = vif->ar;
0708     struct target_stats *stats = &vif->target_stats;
0709     struct tkip_ccmp_stats *ccmp_stats;
0710     s32 rate;
0711     u8 ac;
0712 
0713     if (len < sizeof(*tgt_stats))
0714         return;
0715 
0716     ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n");
0717 
0718     stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt);
0719     stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte);
0720     stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt);
0721     stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte);
0722     stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt);
0723     stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte);
0724     stats->tx_bcast_pkt  += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt);
0725     stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte);
0726     stats->tx_rts_success_cnt +=
0727         le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt);
0728 
0729     for (ac = 0; ac < WMM_NUM_AC; ac++)
0730         stats->tx_pkt_per_ac[ac] +=
0731             le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]);
0732 
0733     stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err);
0734     stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt);
0735     stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt);
0736     stats->tx_mult_retry_cnt +=
0737         le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt);
0738     stats->tx_rts_fail_cnt +=
0739         le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt);
0740 
0741     rate = a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate);
0742     stats->tx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
0743 
0744     stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt);
0745     stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte);
0746     stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt);
0747     stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte);
0748     stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt);
0749     stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte);
0750     stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt);
0751     stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte);
0752     stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt);
0753     stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err);
0754     stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err);
0755     stats->rx_key_cache_miss +=
0756         le32_to_cpu(tgt_stats->stats.rx.key_cache_miss);
0757     stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err);
0758     stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame);
0759 
0760     rate = a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate);
0761     stats->rx_ucast_rate = ath6kl_wmi_get_rate(ar->wmi, rate);
0762 
0763     ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats;
0764 
0765     stats->tkip_local_mic_fail +=
0766         le32_to_cpu(ccmp_stats->tkip_local_mic_fail);
0767     stats->tkip_cnter_measures_invoked +=
0768         le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked);
0769     stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err);
0770 
0771     stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err);
0772     stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays);
0773 
0774     stats->pwr_save_fail_cnt +=
0775         le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt);
0776     stats->noise_floor_calib =
0777         a_sle32_to_cpu(tgt_stats->noise_floor_calib);
0778 
0779     stats->cs_bmiss_cnt +=
0780         le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt);
0781     stats->cs_low_rssi_cnt +=
0782         le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt);
0783     stats->cs_connect_cnt +=
0784         le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt);
0785     stats->cs_discon_cnt +=
0786         le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt);
0787 
0788     stats->cs_ave_beacon_rssi =
0789         a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi);
0790 
0791     stats->cs_last_roam_msec =
0792         tgt_stats->cserv_stats.cs_last_roam_msec;
0793     stats->cs_snr = tgt_stats->cserv_stats.cs_snr;
0794     stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi);
0795 
0796     stats->lq_val = le32_to_cpu(tgt_stats->lq_val);
0797 
0798     stats->wow_pkt_dropped +=
0799         le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped);
0800     stats->wow_host_pkt_wakeups +=
0801         tgt_stats->wow_stats.wow_host_pkt_wakeups;
0802     stats->wow_host_evt_wakeups +=
0803         tgt_stats->wow_stats.wow_host_evt_wakeups;
0804     stats->wow_evt_discarded +=
0805         le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded);
0806 
0807     stats->arp_received = le32_to_cpu(tgt_stats->arp_stats.arp_received);
0808     stats->arp_replied = le32_to_cpu(tgt_stats->arp_stats.arp_replied);
0809     stats->arp_matched = le32_to_cpu(tgt_stats->arp_stats.arp_matched);
0810 
0811     if (test_bit(STATS_UPDATE_PEND, &vif->flags)) {
0812         clear_bit(STATS_UPDATE_PEND, &vif->flags);
0813         wake_up(&ar->event_wq);
0814     }
0815 }
0816 
0817 static void ath6kl_add_le32(__le32 *var, __le32 val)
0818 {
0819     *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val));
0820 }
0821 
0822 void ath6kl_tgt_stats_event(struct ath6kl_vif *vif, u8 *ptr, u32 len)
0823 {
0824     struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr;
0825     struct ath6kl *ar = vif->ar;
0826     struct wmi_ap_mode_stat *ap = &ar->ap_stats;
0827     struct wmi_per_sta_stat *st_ap, *st_p;
0828     u8 ac;
0829 
0830     if (vif->nw_type == AP_NETWORK) {
0831         if (len < sizeof(*p))
0832             return;
0833 
0834         for (ac = 0; ac < AP_MAX_NUM_STA; ac++) {
0835             st_ap = &ap->sta[ac];
0836             st_p = &p->sta[ac];
0837 
0838             ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes);
0839             ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts);
0840             ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error);
0841             ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard);
0842             ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes);
0843             ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts);
0844             ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error);
0845             ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard);
0846         }
0847 
0848     } else {
0849         ath6kl_update_target_stats(vif, ptr, len);
0850     }
0851 }
0852 
0853 void ath6kl_wakeup_event(void *dev)
0854 {
0855     struct ath6kl *ar = (struct ath6kl *) dev;
0856 
0857     wake_up(&ar->event_wq);
0858 }
0859 
0860 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr)
0861 {
0862     struct ath6kl *ar = (struct ath6kl *) devt;
0863 
0864     ar->tx_pwr = tx_pwr;
0865     wake_up(&ar->event_wq);
0866 }
0867 
0868 void ath6kl_pspoll_event(struct ath6kl_vif *vif, u8 aid)
0869 {
0870     struct ath6kl_sta *conn;
0871     struct sk_buff *skb;
0872     bool psq_empty = false;
0873     struct ath6kl *ar = vif->ar;
0874     struct ath6kl_mgmt_buff *mgmt_buf;
0875 
0876     conn = ath6kl_find_sta_by_aid(ar, aid);
0877 
0878     if (!conn)
0879         return;
0880     /*
0881      * Send out a packet queued on ps queue. When the ps queue
0882      * becomes empty update the PVB for this station.
0883      */
0884     spin_lock_bh(&conn->psq_lock);
0885     psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
0886     spin_unlock_bh(&conn->psq_lock);
0887 
0888     if (psq_empty)
0889         /* TODO: Send out a NULL data frame */
0890         return;
0891 
0892     spin_lock_bh(&conn->psq_lock);
0893     if (conn->mgmt_psq_len > 0) {
0894         mgmt_buf = list_first_entry(&conn->mgmt_psq,
0895                     struct ath6kl_mgmt_buff, list);
0896         list_del(&mgmt_buf->list);
0897         conn->mgmt_psq_len--;
0898         spin_unlock_bh(&conn->psq_lock);
0899 
0900         conn->sta_flags |= STA_PS_POLLED;
0901         ath6kl_wmi_send_mgmt_cmd(ar->wmi, vif->fw_vif_idx,
0902                      mgmt_buf->id, mgmt_buf->freq,
0903                      mgmt_buf->wait, mgmt_buf->buf,
0904                      mgmt_buf->len, mgmt_buf->no_cck);
0905         conn->sta_flags &= ~STA_PS_POLLED;
0906         kfree(mgmt_buf);
0907     } else {
0908         skb = skb_dequeue(&conn->psq);
0909         spin_unlock_bh(&conn->psq_lock);
0910 
0911         conn->sta_flags |= STA_PS_POLLED;
0912         ath6kl_data_tx(skb, vif->ndev);
0913         conn->sta_flags &= ~STA_PS_POLLED;
0914     }
0915 
0916     spin_lock_bh(&conn->psq_lock);
0917     psq_empty  = skb_queue_empty(&conn->psq) && (conn->mgmt_psq_len == 0);
0918     spin_unlock_bh(&conn->psq_lock);
0919 
0920     if (psq_empty)
0921         ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, conn->aid, 0);
0922 }
0923 
0924 void ath6kl_dtimexpiry_event(struct ath6kl_vif *vif)
0925 {
0926     bool mcastq_empty = false;
0927     struct sk_buff *skb;
0928     struct ath6kl *ar = vif->ar;
0929 
0930     /*
0931      * If there are no associated STAs, ignore the DTIM expiry event.
0932      * There can be potential race conditions where the last associated
0933      * STA may disconnect & before the host could clear the 'Indicate
0934      * DTIM' request to the firmware, the firmware would have just
0935      * indicated a DTIM expiry event. The race is between 'clear DTIM
0936      * expiry cmd' going from the host to the firmware & the DTIM
0937      * expiry event happening from the firmware to the host.
0938      */
0939     if (!ar->sta_list_index)
0940         return;
0941 
0942     spin_lock_bh(&ar->mcastpsq_lock);
0943     mcastq_empty = skb_queue_empty(&ar->mcastpsq);
0944     spin_unlock_bh(&ar->mcastpsq_lock);
0945 
0946     if (mcastq_empty)
0947         return;
0948 
0949     /* set the STA flag to dtim_expired for the frame to go out */
0950     set_bit(DTIM_EXPIRED, &vif->flags);
0951 
0952     spin_lock_bh(&ar->mcastpsq_lock);
0953     while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) {
0954         spin_unlock_bh(&ar->mcastpsq_lock);
0955 
0956         ath6kl_data_tx(skb, vif->ndev);
0957 
0958         spin_lock_bh(&ar->mcastpsq_lock);
0959     }
0960     spin_unlock_bh(&ar->mcastpsq_lock);
0961 
0962     clear_bit(DTIM_EXPIRED, &vif->flags);
0963 
0964     /* clear the LSB of the BitMapCtl field of the TIM IE */
0965     ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, MCAST_AID, 0);
0966 }
0967 
0968 void ath6kl_disconnect_event(struct ath6kl_vif *vif, u8 reason, u8 *bssid,
0969                  u8 assoc_resp_len, u8 *assoc_info,
0970                  u16 prot_reason_status)
0971 {
0972     struct ath6kl *ar = vif->ar;
0973 
0974     if (vif->nw_type == AP_NETWORK) {
0975         /* disconnect due to other STA vif switching channels */
0976         if (reason == BSS_DISCONNECTED &&
0977             prot_reason_status == WMI_AP_REASON_STA_ROAM) {
0978             ar->want_ch_switch |= 1 << vif->fw_vif_idx;
0979             /* bail back to this channel if STA vif fails connect */
0980             ar->last_ch = le16_to_cpu(vif->profile.ch);
0981         }
0982 
0983         if (prot_reason_status == WMI_AP_REASON_MAX_STA) {
0984             /* send max client reached notification to user space */
0985             cfg80211_conn_failed(vif->ndev, bssid,
0986                          NL80211_CONN_FAIL_MAX_CLIENTS,
0987                          GFP_KERNEL);
0988         }
0989 
0990         if (prot_reason_status == WMI_AP_REASON_ACL) {
0991             /* send blocked client notification to user space */
0992             cfg80211_conn_failed(vif->ndev, bssid,
0993                          NL80211_CONN_FAIL_BLOCKED_CLIENT,
0994                          GFP_KERNEL);
0995         }
0996 
0997         if (!ath6kl_remove_sta(ar, bssid, prot_reason_status))
0998             return;
0999 
1000         /* if no more associated STAs, empty the mcast PS q */
1001         if (ar->sta_list_index == 0) {
1002             spin_lock_bh(&ar->mcastpsq_lock);
1003             skb_queue_purge(&ar->mcastpsq);
1004             spin_unlock_bh(&ar->mcastpsq_lock);
1005 
1006             /* clear the LSB of the TIM IE's BitMapCtl field */
1007             if (test_bit(WMI_READY, &ar->flag))
1008                 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx,
1009                                MCAST_AID, 0);
1010         }
1011 
1012         if (!is_broadcast_ether_addr(bssid)) {
1013             /* send event to application */
1014             cfg80211_del_sta(vif->ndev, bssid, GFP_KERNEL);
1015         }
1016 
1017         if (memcmp(vif->ndev->dev_addr, bssid, ETH_ALEN) == 0) {
1018             memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list));
1019             clear_bit(CONNECTED, &vif->flags);
1020         }
1021         return;
1022     }
1023 
1024     ath6kl_cfg80211_disconnect_event(vif, reason, bssid,
1025                      assoc_resp_len, assoc_info,
1026                      prot_reason_status);
1027 
1028     aggr_reset_state(vif->aggr_cntxt->aggr_conn);
1029 
1030     del_timer(&vif->disconnect_timer);
1031 
1032     ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "disconnect reason is %d\n", reason);
1033 
1034     /*
1035      * If the event is due to disconnect cmd from the host, only they
1036      * the target would stop trying to connect. Under any other
1037      * condition, target would keep trying to connect.
1038      */
1039     if (reason == DISCONNECT_CMD) {
1040         if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag))
1041             ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx,
1042                          NONE_BSS_FILTER, 0);
1043     } else {
1044         set_bit(CONNECT_PEND, &vif->flags);
1045         if (((reason == ASSOC_FAILED) &&
1046              (prot_reason_status == 0x11)) ||
1047             ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0) &&
1048              (vif->reconnect_flag == 1))) {
1049             set_bit(CONNECTED, &vif->flags);
1050             return;
1051         }
1052     }
1053 
1054     /* restart disconnected concurrent vifs waiting for new channel */
1055     ath6kl_check_ch_switch(ar, ar->last_ch);
1056 
1057     /* update connect & link status atomically */
1058     spin_lock_bh(&vif->if_lock);
1059     clear_bit(CONNECTED, &vif->flags);
1060     netif_carrier_off(vif->ndev);
1061     spin_unlock_bh(&vif->if_lock);
1062 
1063     if ((reason != CSERV_DISCONNECT) || (vif->reconnect_flag != 1))
1064         vif->reconnect_flag = 0;
1065 
1066     if (reason != CSERV_DISCONNECT)
1067         ar->user_key_ctrl = 0;
1068 
1069     netif_stop_queue(vif->ndev);
1070     memset(vif->bssid, 0, sizeof(vif->bssid));
1071     vif->bss_ch = 0;
1072 
1073     ath6kl_tx_data_cleanup(ar);
1074 }
1075 
1076 struct ath6kl_vif *ath6kl_vif_first(struct ath6kl *ar)
1077 {
1078     struct ath6kl_vif *vif;
1079 
1080     spin_lock_bh(&ar->list_lock);
1081     if (list_empty(&ar->vif_list)) {
1082         spin_unlock_bh(&ar->list_lock);
1083         return NULL;
1084     }
1085 
1086     vif = list_first_entry(&ar->vif_list, struct ath6kl_vif, list);
1087 
1088     spin_unlock_bh(&ar->list_lock);
1089 
1090     return vif;
1091 }
1092 
1093 static int ath6kl_open(struct net_device *dev)
1094 {
1095     struct ath6kl_vif *vif = netdev_priv(dev);
1096 
1097     set_bit(WLAN_ENABLED, &vif->flags);
1098 
1099     if (test_bit(CONNECTED, &vif->flags)) {
1100         netif_carrier_on(dev);
1101         netif_wake_queue(dev);
1102     } else {
1103         netif_carrier_off(dev);
1104     }
1105 
1106     return 0;
1107 }
1108 
1109 static int ath6kl_close(struct net_device *dev)
1110 {
1111     struct ath6kl_vif *vif = netdev_priv(dev);
1112 
1113     netif_stop_queue(dev);
1114 
1115     ath6kl_cfg80211_stop(vif);
1116 
1117     clear_bit(WLAN_ENABLED, &vif->flags);
1118 
1119     return 0;
1120 }
1121 
1122 static int ath6kl_set_features(struct net_device *dev,
1123                    netdev_features_t features)
1124 {
1125     struct ath6kl_vif *vif = netdev_priv(dev);
1126     struct ath6kl *ar = vif->ar;
1127     int err = 0;
1128 
1129     if ((features & NETIF_F_RXCSUM) &&
1130         (ar->rx_meta_ver != WMI_META_VERSION_2)) {
1131         ar->rx_meta_ver = WMI_META_VERSION_2;
1132         err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1133                              vif->fw_vif_idx,
1134                              ar->rx_meta_ver, 0, 0);
1135         if (err) {
1136             dev->features = features & ~NETIF_F_RXCSUM;
1137             return err;
1138         }
1139     } else if (!(features & NETIF_F_RXCSUM) &&
1140            (ar->rx_meta_ver == WMI_META_VERSION_2)) {
1141         ar->rx_meta_ver = 0;
1142         err = ath6kl_wmi_set_rx_frame_format_cmd(ar->wmi,
1143                              vif->fw_vif_idx,
1144                              ar->rx_meta_ver, 0, 0);
1145         if (err) {
1146             dev->features = features | NETIF_F_RXCSUM;
1147             return err;
1148         }
1149     }
1150 
1151     return err;
1152 }
1153 
1154 static void ath6kl_set_multicast_list(struct net_device *ndev)
1155 {
1156     struct ath6kl_vif *vif = netdev_priv(ndev);
1157     bool mc_all_on = false;
1158     int mc_count = netdev_mc_count(ndev);
1159     struct netdev_hw_addr *ha;
1160     bool found;
1161     struct ath6kl_mc_filter *mc_filter, *tmp;
1162     struct list_head mc_filter_new;
1163     int ret;
1164 
1165     if (!test_bit(WMI_READY, &vif->ar->flag) ||
1166         !test_bit(WLAN_ENABLED, &vif->flags))
1167         return;
1168 
1169     /* Enable multicast-all filter. */
1170     mc_all_on = !!(ndev->flags & IFF_PROMISC) ||
1171             !!(ndev->flags & IFF_ALLMULTI) ||
1172             !!(mc_count > ATH6K_MAX_MC_FILTERS_PER_LIST);
1173 
1174     if (mc_all_on)
1175         set_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1176     else
1177         clear_bit(NETDEV_MCAST_ALL_ON, &vif->flags);
1178 
1179     if (test_bit(ATH6KL_FW_CAPABILITY_WOW_MULTICAST_FILTER,
1180              vif->ar->fw_capabilities)) {
1181         mc_all_on = mc_all_on || (vif->ar->state == ATH6KL_STATE_ON);
1182     }
1183 
1184     if (!(ndev->flags & IFF_MULTICAST)) {
1185         mc_all_on = false;
1186         set_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1187     } else {
1188         clear_bit(NETDEV_MCAST_ALL_OFF, &vif->flags);
1189     }
1190 
1191     /* Enable/disable "multicast-all" filter*/
1192     ath6kl_dbg(ATH6KL_DBG_TRC, "%s multicast-all filter\n",
1193            mc_all_on ? "enabling" : "disabling");
1194 
1195     ret = ath6kl_wmi_mcast_filter_cmd(vif->ar->wmi, vif->fw_vif_idx,
1196                           mc_all_on);
1197     if (ret) {
1198         ath6kl_warn("Failed to %s multicast-all receive\n",
1199                 mc_all_on ? "enable" : "disable");
1200         return;
1201     }
1202 
1203     if (test_bit(NETDEV_MCAST_ALL_ON, &vif->flags))
1204         return;
1205 
1206     /* Keep the driver and firmware mcast list in sync. */
1207     list_for_each_entry_safe(mc_filter, tmp, &vif->mc_filter, list) {
1208         found = false;
1209         netdev_for_each_mc_addr(ha, ndev) {
1210             if (memcmp(ha->addr, mc_filter->hw_addr,
1211                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1212                 found = true;
1213                 break;
1214             }
1215         }
1216 
1217         if (!found) {
1218             /*
1219              * Delete the filter which was previously set
1220              * but not in the new request.
1221              */
1222             ath6kl_dbg(ATH6KL_DBG_TRC,
1223                    "Removing %pM from multicast filter\n",
1224                    mc_filter->hw_addr);
1225             ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1226                     vif->fw_vif_idx, mc_filter->hw_addr,
1227                     false);
1228             if (ret) {
1229                 ath6kl_warn("Failed to remove multicast filter:%pM\n",
1230                         mc_filter->hw_addr);
1231                 return;
1232             }
1233 
1234             list_del(&mc_filter->list);
1235             kfree(mc_filter);
1236         }
1237     }
1238 
1239     INIT_LIST_HEAD(&mc_filter_new);
1240 
1241     netdev_for_each_mc_addr(ha, ndev) {
1242         found = false;
1243         list_for_each_entry(mc_filter, &vif->mc_filter, list) {
1244             if (memcmp(ha->addr, mc_filter->hw_addr,
1245                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE) == 0) {
1246                 found = true;
1247                 break;
1248             }
1249         }
1250 
1251         if (!found) {
1252             mc_filter = kzalloc(sizeof(struct ath6kl_mc_filter),
1253                         GFP_ATOMIC);
1254             if (!mc_filter) {
1255                 WARN_ON(1);
1256                 goto out;
1257             }
1258 
1259             memcpy(mc_filter->hw_addr, ha->addr,
1260                    ATH6KL_MCAST_FILTER_MAC_ADDR_SIZE);
1261             /* Set the multicast filter */
1262             ath6kl_dbg(ATH6KL_DBG_TRC,
1263                    "Adding %pM to multicast filter list\n",
1264                    mc_filter->hw_addr);
1265             ret = ath6kl_wmi_add_del_mcast_filter_cmd(vif->ar->wmi,
1266                     vif->fw_vif_idx, mc_filter->hw_addr,
1267                     true);
1268             if (ret) {
1269                 ath6kl_warn("Failed to add multicast filter :%pM\n",
1270                         mc_filter->hw_addr);
1271                 kfree(mc_filter);
1272                 goto out;
1273             }
1274 
1275             list_add_tail(&mc_filter->list, &mc_filter_new);
1276         }
1277     }
1278 
1279 out:
1280     list_splice_tail(&mc_filter_new, &vif->mc_filter);
1281 }
1282 
1283 static const struct net_device_ops ath6kl_netdev_ops = {
1284     .ndo_open               = ath6kl_open,
1285     .ndo_stop               = ath6kl_close,
1286     .ndo_start_xmit         = ath6kl_data_tx,
1287     .ndo_set_features       = ath6kl_set_features,
1288     .ndo_set_rx_mode    = ath6kl_set_multicast_list,
1289 };
1290 
1291 void init_netdev(struct net_device *dev)
1292 {
1293     struct ath6kl *ar = ath6kl_priv(dev);
1294 
1295     dev->netdev_ops = &ath6kl_netdev_ops;
1296     dev->needs_free_netdev = true;
1297     dev->watchdog_timeo = ATH6KL_TX_TIMEOUT;
1298 
1299     dev->needed_headroom = ETH_HLEN;
1300     dev->needed_headroom += roundup(sizeof(struct ath6kl_llc_snap_hdr) +
1301                     sizeof(struct wmi_data_hdr) +
1302                     HTC_HDR_LENGTH +
1303                     WMI_MAX_TX_META_SZ +
1304                     ATH6KL_HTC_ALIGN_BYTES, 4);
1305 
1306     if (!test_bit(ATH6KL_FW_CAPABILITY_NO_IP_CHECKSUM,
1307               ar->fw_capabilities))
1308         dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1309 
1310     return;
1311 }
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