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0001 /*
0002  * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>
0003  *
0004  * Permission to use, copy, modify, and/or distribute this software for any
0005  * purpose with or without fee is hereby granted, provided that the above
0006  * copyright notice and this permission notice appear in all copies.
0007  *
0008  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
0009  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
0010  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
0011  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
0012  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
0013  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
0014  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
0015  */
0016 
0017 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0018 
0019 #include <linux/module.h>
0020 #include <linux/firmware.h>
0021 #include <linux/platform_device.h>
0022 #include <linux/of_address.h>
0023 #include <linux/of_device.h>
0024 #include <linux/of_irq.h>
0025 #include <linux/rpmsg.h>
0026 #include <linux/soc/qcom/smem_state.h>
0027 #include <linux/soc/qcom/wcnss_ctrl.h>
0028 #include <net/ipv6.h>
0029 #include "wcn36xx.h"
0030 #include "testmode.h"
0031 #include "firmware.h"
0032 
0033 unsigned int wcn36xx_dbg_mask;
0034 module_param_named(debug_mask, wcn36xx_dbg_mask, uint, 0644);
0035 MODULE_PARM_DESC(debug_mask, "Debugging mask");
0036 
0037 #define CHAN2G(_freq, _idx) { \
0038     .band = NL80211_BAND_2GHZ, \
0039     .center_freq = (_freq), \
0040     .hw_value = (_idx), \
0041     .max_power = 25, \
0042 }
0043 
0044 #define CHAN5G(_freq, _idx, _phy_val) { \
0045     .band = NL80211_BAND_5GHZ, \
0046     .center_freq = (_freq), \
0047     .hw_value = (_phy_val) << HW_VALUE_PHY_SHIFT | HW_VALUE_CHANNEL(_idx), \
0048     .max_power = 25, \
0049 }
0050 
0051 /* The wcn firmware expects channel values to matching
0052  * their mnemonic values. So use these for .hw_value. */
0053 static struct ieee80211_channel wcn_2ghz_channels[] = {
0054     CHAN2G(2412, 1), /* Channel 1 */
0055     CHAN2G(2417, 2), /* Channel 2 */
0056     CHAN2G(2422, 3), /* Channel 3 */
0057     CHAN2G(2427, 4), /* Channel 4 */
0058     CHAN2G(2432, 5), /* Channel 5 */
0059     CHAN2G(2437, 6), /* Channel 6 */
0060     CHAN2G(2442, 7), /* Channel 7 */
0061     CHAN2G(2447, 8), /* Channel 8 */
0062     CHAN2G(2452, 9), /* Channel 9 */
0063     CHAN2G(2457, 10), /* Channel 10 */
0064     CHAN2G(2462, 11), /* Channel 11 */
0065     CHAN2G(2467, 12), /* Channel 12 */
0066     CHAN2G(2472, 13), /* Channel 13 */
0067     CHAN2G(2484, 14)  /* Channel 14 */
0068 
0069 };
0070 
0071 static struct ieee80211_channel wcn_5ghz_channels[] = {
0072     CHAN5G(5180, 36, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
0073     CHAN5G(5200, 40, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
0074     CHAN5G(5220, 44, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
0075     CHAN5G(5240, 48, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
0076     CHAN5G(5260, 52, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
0077     CHAN5G(5280, 56, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
0078     CHAN5G(5300, 60, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
0079     CHAN5G(5320, 64, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
0080     CHAN5G(5500, 100, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
0081     CHAN5G(5520, 104, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
0082     CHAN5G(5540, 108, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
0083     CHAN5G(5560, 112, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
0084     CHAN5G(5580, 116, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
0085     CHAN5G(5600, 120, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
0086     CHAN5G(5620, 124, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
0087     CHAN5G(5640, 128, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
0088     CHAN5G(5660, 132, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
0089     CHAN5G(5680, 136, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
0090     CHAN5G(5700, 140, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
0091     CHAN5G(5720, 144, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
0092     CHAN5G(5745, 149, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
0093     CHAN5G(5765, 153, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
0094     CHAN5G(5785, 157, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
0095     CHAN5G(5805, 161, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
0096     CHAN5G(5825, 165, 0)
0097 };
0098 
0099 #define RATE(_bitrate, _hw_rate, _flags) { \
0100     .bitrate        = (_bitrate),                   \
0101     .flags          = (_flags),                     \
0102     .hw_value       = (_hw_rate),                   \
0103     .hw_value_short = (_hw_rate)  \
0104 }
0105 
0106 static struct ieee80211_rate wcn_2ghz_rates[] = {
0107     RATE(10, HW_RATE_INDEX_1MBPS, 0),
0108     RATE(20, HW_RATE_INDEX_2MBPS, IEEE80211_RATE_SHORT_PREAMBLE),
0109     RATE(55, HW_RATE_INDEX_5_5MBPS, IEEE80211_RATE_SHORT_PREAMBLE),
0110     RATE(110, HW_RATE_INDEX_11MBPS, IEEE80211_RATE_SHORT_PREAMBLE),
0111     RATE(60, HW_RATE_INDEX_6MBPS, 0),
0112     RATE(90, HW_RATE_INDEX_9MBPS, 0),
0113     RATE(120, HW_RATE_INDEX_12MBPS, 0),
0114     RATE(180, HW_RATE_INDEX_18MBPS, 0),
0115     RATE(240, HW_RATE_INDEX_24MBPS, 0),
0116     RATE(360, HW_RATE_INDEX_36MBPS, 0),
0117     RATE(480, HW_RATE_INDEX_48MBPS, 0),
0118     RATE(540, HW_RATE_INDEX_54MBPS, 0)
0119 };
0120 
0121 static struct ieee80211_rate wcn_5ghz_rates[] = {
0122     RATE(60, HW_RATE_INDEX_6MBPS, 0),
0123     RATE(90, HW_RATE_INDEX_9MBPS, 0),
0124     RATE(120, HW_RATE_INDEX_12MBPS, 0),
0125     RATE(180, HW_RATE_INDEX_18MBPS, 0),
0126     RATE(240, HW_RATE_INDEX_24MBPS, 0),
0127     RATE(360, HW_RATE_INDEX_36MBPS, 0),
0128     RATE(480, HW_RATE_INDEX_48MBPS, 0),
0129     RATE(540, HW_RATE_INDEX_54MBPS, 0)
0130 };
0131 
0132 static struct ieee80211_supported_band wcn_band_2ghz = {
0133     .channels   = wcn_2ghz_channels,
0134     .n_channels = ARRAY_SIZE(wcn_2ghz_channels),
0135     .bitrates   = wcn_2ghz_rates,
0136     .n_bitrates = ARRAY_SIZE(wcn_2ghz_rates),
0137     .ht_cap     = {
0138         .cap =  IEEE80211_HT_CAP_GRN_FLD |
0139             IEEE80211_HT_CAP_SGI_20 |
0140             IEEE80211_HT_CAP_DSSSCCK40 |
0141             IEEE80211_HT_CAP_LSIG_TXOP_PROT |
0142             IEEE80211_HT_CAP_SGI_40 |
0143             IEEE80211_HT_CAP_SUP_WIDTH_20_40,
0144         .ht_supported = true,
0145         .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
0146         .ampdu_density = IEEE80211_HT_MPDU_DENSITY_16,
0147         .mcs = {
0148             .rx_mask = { 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
0149             .rx_highest = cpu_to_le16(72),
0150             .tx_params = IEEE80211_HT_MCS_TX_DEFINED,
0151         }
0152     }
0153 };
0154 
0155 static struct ieee80211_supported_band wcn_band_5ghz = {
0156     .channels   = wcn_5ghz_channels,
0157     .n_channels = ARRAY_SIZE(wcn_5ghz_channels),
0158     .bitrates   = wcn_5ghz_rates,
0159     .n_bitrates = ARRAY_SIZE(wcn_5ghz_rates),
0160     .ht_cap     = {
0161         .cap =  IEEE80211_HT_CAP_GRN_FLD |
0162             IEEE80211_HT_CAP_SGI_20 |
0163             IEEE80211_HT_CAP_DSSSCCK40 |
0164             IEEE80211_HT_CAP_LSIG_TXOP_PROT |
0165             IEEE80211_HT_CAP_SGI_40 |
0166             IEEE80211_HT_CAP_SUP_WIDTH_20_40,
0167         .ht_supported = true,
0168         .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K,
0169         .ampdu_density = IEEE80211_HT_MPDU_DENSITY_16,
0170         .mcs = {
0171             .rx_mask = { 0xff, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
0172             .rx_highest = cpu_to_le16(150),
0173             .tx_params = IEEE80211_HT_MCS_TX_DEFINED,
0174         }
0175     }
0176 };
0177 
0178 #ifdef CONFIG_PM
0179 
0180 static const struct wiphy_wowlan_support wowlan_support = {
0181     .flags = WIPHY_WOWLAN_ANY   |
0182          WIPHY_WOWLAN_MAGIC_PKT |
0183          WIPHY_WOWLAN_SUPPORTS_GTK_REKEY
0184 };
0185 
0186 #endif
0187 
0188 static inline u8 get_sta_index(struct ieee80211_vif *vif,
0189                    struct wcn36xx_sta *sta_priv)
0190 {
0191     return NL80211_IFTYPE_STATION == vif->type ?
0192            sta_priv->bss_sta_index :
0193            sta_priv->sta_index;
0194 }
0195 
0196 static void wcn36xx_feat_caps_info(struct wcn36xx *wcn)
0197 {
0198     int i;
0199 
0200     for (i = 0; i < MAX_FEATURE_SUPPORTED; i++) {
0201         if (wcn36xx_firmware_get_feat_caps(wcn->fw_feat_caps, i)) {
0202             wcn36xx_dbg(WCN36XX_DBG_MAC, "FW Cap %s\n",
0203                     wcn36xx_firmware_get_cap_name(i));
0204         }
0205     }
0206 }
0207 
0208 static int wcn36xx_start(struct ieee80211_hw *hw)
0209 {
0210     struct wcn36xx *wcn = hw->priv;
0211     int ret;
0212 
0213     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac start\n");
0214 
0215     /* SMD initialization */
0216     ret = wcn36xx_smd_open(wcn);
0217     if (ret) {
0218         wcn36xx_err("Failed to open smd channel: %d\n", ret);
0219         goto out_err;
0220     }
0221 
0222     /* Allocate memory pools for Mgmt BD headers and Data BD headers */
0223     ret = wcn36xx_dxe_allocate_mem_pools(wcn);
0224     if (ret) {
0225         wcn36xx_err("Failed to alloc DXE mempool: %d\n", ret);
0226         goto out_smd_close;
0227     }
0228 
0229     ret = wcn36xx_dxe_alloc_ctl_blks(wcn);
0230     if (ret) {
0231         wcn36xx_err("Failed to alloc DXE ctl blocks: %d\n", ret);
0232         goto out_free_dxe_pool;
0233     }
0234 
0235     ret = wcn36xx_smd_load_nv(wcn);
0236     if (ret) {
0237         wcn36xx_err("Failed to push NV to chip\n");
0238         goto out_free_dxe_ctl;
0239     }
0240 
0241     ret = wcn36xx_smd_start(wcn);
0242     if (ret) {
0243         wcn36xx_err("Failed to start chip\n");
0244         goto out_free_dxe_ctl;
0245     }
0246 
0247     if (!wcn36xx_is_fw_version(wcn, 1, 2, 2, 24)) {
0248         ret = wcn36xx_smd_feature_caps_exchange(wcn);
0249         if (ret)
0250             wcn36xx_warn("Exchange feature caps failed\n");
0251         else
0252             wcn36xx_feat_caps_info(wcn);
0253     }
0254 
0255     /* DMA channel initialization */
0256     ret = wcn36xx_dxe_init(wcn);
0257     if (ret) {
0258         wcn36xx_err("DXE init failed\n");
0259         goto out_smd_stop;
0260     }
0261 
0262     wcn36xx_debugfs_init(wcn);
0263 
0264     INIT_LIST_HEAD(&wcn->vif_list);
0265     spin_lock_init(&wcn->dxe_lock);
0266     spin_lock_init(&wcn->survey_lock);
0267 
0268     return 0;
0269 
0270 out_smd_stop:
0271     wcn36xx_smd_stop(wcn);
0272 out_free_dxe_ctl:
0273     wcn36xx_dxe_free_ctl_blks(wcn);
0274 out_free_dxe_pool:
0275     wcn36xx_dxe_free_mem_pools(wcn);
0276 out_smd_close:
0277     wcn36xx_smd_close(wcn);
0278 out_err:
0279     return ret;
0280 }
0281 
0282 static void wcn36xx_stop(struct ieee80211_hw *hw)
0283 {
0284     struct wcn36xx *wcn = hw->priv;
0285 
0286     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac stop\n");
0287 
0288     mutex_lock(&wcn->scan_lock);
0289     if (wcn->scan_req) {
0290         struct cfg80211_scan_info scan_info = {
0291             .aborted = true,
0292         };
0293 
0294         ieee80211_scan_completed(wcn->hw, &scan_info);
0295     }
0296     wcn->scan_req = NULL;
0297     mutex_unlock(&wcn->scan_lock);
0298 
0299     wcn36xx_debugfs_exit(wcn);
0300     wcn36xx_smd_stop(wcn);
0301     wcn36xx_dxe_deinit(wcn);
0302     wcn36xx_smd_close(wcn);
0303 
0304     wcn36xx_dxe_free_mem_pools(wcn);
0305     wcn36xx_dxe_free_ctl_blks(wcn);
0306 }
0307 
0308 static void wcn36xx_change_ps(struct wcn36xx *wcn, bool enable)
0309 {
0310     struct ieee80211_vif *vif = NULL;
0311     struct wcn36xx_vif *tmp;
0312 
0313     list_for_each_entry(tmp, &wcn->vif_list, list) {
0314         vif = wcn36xx_priv_to_vif(tmp);
0315         if (enable && !wcn->sw_scan) {
0316             if (vif->cfg.ps) /* ps allowed ? */
0317                 wcn36xx_pmc_enter_bmps_state(wcn, vif);
0318         } else {
0319             wcn36xx_pmc_exit_bmps_state(wcn, vif);
0320         }
0321     }
0322 }
0323 
0324 static void wcn36xx_change_opchannel(struct wcn36xx *wcn, int ch)
0325 {
0326     struct ieee80211_vif *vif = NULL;
0327     struct wcn36xx_vif *tmp;
0328     struct ieee80211_supported_band *band;
0329     struct ieee80211_channel *channel = NULL;
0330     unsigned long flags;
0331     int i, j;
0332 
0333     for (i = 0; i < ARRAY_SIZE(wcn->hw->wiphy->bands); i++) {
0334         band = wcn->hw->wiphy->bands[i];
0335         if (!band)
0336             break;
0337         for (j = 0; j < band->n_channels; j++) {
0338             if (HW_VALUE_CHANNEL(band->channels[j].hw_value) == ch) {
0339                 channel = &band->channels[j];
0340                 break;
0341             }
0342         }
0343         if (channel)
0344             break;
0345     }
0346 
0347     if (!channel) {
0348         wcn36xx_err("Cannot tune to channel %d\n", ch);
0349         return;
0350     }
0351 
0352     spin_lock_irqsave(&wcn->survey_lock, flags);
0353     wcn->band = band;
0354     wcn->channel = channel;
0355     spin_unlock_irqrestore(&wcn->survey_lock, flags);
0356 
0357     list_for_each_entry(tmp, &wcn->vif_list, list) {
0358         vif = wcn36xx_priv_to_vif(tmp);
0359         wcn36xx_smd_switch_channel(wcn, vif, ch);
0360     }
0361 
0362     return;
0363 }
0364 
0365 static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed)
0366 {
0367     struct wcn36xx *wcn = hw->priv;
0368     int ret;
0369 
0370     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac config changed 0x%08x\n", changed);
0371 
0372     mutex_lock(&wcn->conf_mutex);
0373 
0374     if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
0375         int ch = WCN36XX_HW_CHANNEL(wcn);
0376         wcn36xx_dbg(WCN36XX_DBG_MAC, "wcn36xx_config channel switch=%d\n",
0377                 ch);
0378 
0379         if (wcn->sw_scan_opchannel == ch && wcn->sw_scan_channel) {
0380             /* If channel is the initial operating channel, we may
0381              * want to receive/transmit regular data packets, then
0382              * simply stop the scan session and exit PS mode.
0383              */
0384             if (wcn->sw_scan_channel)
0385                 wcn36xx_smd_end_scan(wcn, wcn->sw_scan_channel);
0386             if (wcn->sw_scan_init) {
0387                 wcn36xx_smd_finish_scan(wcn, HAL_SYS_MODE_SCAN,
0388                             wcn->sw_scan_vif);
0389             }
0390         } else if (wcn->sw_scan) {
0391             /* A scan is ongoing, do not change the operating
0392              * channel, but start a scan session on the channel.
0393              */
0394             if (wcn->sw_scan_channel)
0395                 wcn36xx_smd_end_scan(wcn, wcn->sw_scan_channel);
0396             if (!wcn->sw_scan_init) {
0397                 /* This can fail if we are unable to notify the
0398                  * operating channel.
0399                  */
0400                 ret = wcn36xx_smd_init_scan(wcn,
0401                                 HAL_SYS_MODE_SCAN,
0402                                 wcn->sw_scan_vif);
0403                 if (ret) {
0404                     mutex_unlock(&wcn->conf_mutex);
0405                     return -EIO;
0406                 }
0407             }
0408             wcn36xx_smd_start_scan(wcn, ch);
0409         } else {
0410             wcn36xx_change_opchannel(wcn, ch);
0411         }
0412     }
0413 
0414     if (changed & IEEE80211_CONF_CHANGE_PS)
0415         wcn36xx_change_ps(wcn, hw->conf.flags & IEEE80211_CONF_PS);
0416 
0417     if (changed & IEEE80211_CONF_CHANGE_IDLE) {
0418         if (hw->conf.flags & IEEE80211_CONF_IDLE)
0419             wcn36xx_smd_enter_imps(wcn);
0420         else
0421             wcn36xx_smd_exit_imps(wcn);
0422     }
0423 
0424     mutex_unlock(&wcn->conf_mutex);
0425 
0426     return 0;
0427 }
0428 
0429 static void wcn36xx_configure_filter(struct ieee80211_hw *hw,
0430                      unsigned int changed,
0431                      unsigned int *total, u64 multicast)
0432 {
0433     struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp;
0434     struct wcn36xx *wcn = hw->priv;
0435     struct wcn36xx_vif *tmp;
0436     struct ieee80211_vif *vif = NULL;
0437 
0438     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac configure filter\n");
0439 
0440     mutex_lock(&wcn->conf_mutex);
0441 
0442     *total &= FIF_ALLMULTI;
0443 
0444     fp = (void *)(unsigned long)multicast;
0445     list_for_each_entry(tmp, &wcn->vif_list, list) {
0446         vif = wcn36xx_priv_to_vif(tmp);
0447 
0448         /* FW handles MC filtering only when connected as STA */
0449         if (*total & FIF_ALLMULTI)
0450             wcn36xx_smd_set_mc_list(wcn, vif, NULL);
0451         else if (NL80211_IFTYPE_STATION == vif->type && tmp->sta_assoc)
0452             wcn36xx_smd_set_mc_list(wcn, vif, fp);
0453     }
0454 
0455     mutex_unlock(&wcn->conf_mutex);
0456     kfree(fp);
0457 }
0458 
0459 static u64 wcn36xx_prepare_multicast(struct ieee80211_hw *hw,
0460                      struct netdev_hw_addr_list *mc_list)
0461 {
0462     struct wcn36xx_hal_rcv_flt_mc_addr_list_type *fp;
0463     struct netdev_hw_addr *ha;
0464 
0465     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac prepare multicast list\n");
0466     fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
0467     if (!fp) {
0468         wcn36xx_err("Out of memory setting filters.\n");
0469         return 0;
0470     }
0471 
0472     fp->mc_addr_count = 0;
0473     /* update multicast filtering parameters */
0474     if (netdev_hw_addr_list_count(mc_list) <=
0475         WCN36XX_HAL_MAX_NUM_MULTICAST_ADDRESS) {
0476         netdev_hw_addr_list_for_each(ha, mc_list) {
0477             memcpy(fp->mc_addr[fp->mc_addr_count],
0478                     ha->addr, ETH_ALEN);
0479             fp->mc_addr_count++;
0480         }
0481     }
0482 
0483     return (u64)(unsigned long)fp;
0484 }
0485 
0486 static void wcn36xx_tx(struct ieee80211_hw *hw,
0487                struct ieee80211_tx_control *control,
0488                struct sk_buff *skb)
0489 {
0490     struct wcn36xx *wcn = hw->priv;
0491     struct wcn36xx_sta *sta_priv = NULL;
0492 
0493     if (control->sta)
0494         sta_priv = wcn36xx_sta_to_priv(control->sta);
0495 
0496     if (wcn36xx_start_tx(wcn, sta_priv, skb))
0497         ieee80211_free_txskb(wcn->hw, skb);
0498 }
0499 
0500 static int wcn36xx_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
0501                struct ieee80211_vif *vif,
0502                struct ieee80211_sta *sta,
0503                struct ieee80211_key_conf *key_conf)
0504 {
0505     struct wcn36xx *wcn = hw->priv;
0506     struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
0507     struct wcn36xx_sta *sta_priv = sta ? wcn36xx_sta_to_priv(sta) : NULL;
0508     int ret = 0;
0509     u8 key[WLAN_MAX_KEY_LEN];
0510 
0511     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac80211 set key\n");
0512     wcn36xx_dbg(WCN36XX_DBG_MAC, "Key: cmd=0x%x algo:0x%x, id:%d, len:%d flags 0x%x\n",
0513             cmd, key_conf->cipher, key_conf->keyidx,
0514             key_conf->keylen, key_conf->flags);
0515     wcn36xx_dbg_dump(WCN36XX_DBG_MAC, "KEY: ",
0516              key_conf->key,
0517              key_conf->keylen);
0518 
0519     mutex_lock(&wcn->conf_mutex);
0520 
0521     switch (key_conf->cipher) {
0522     case WLAN_CIPHER_SUITE_WEP40:
0523         vif_priv->encrypt_type = WCN36XX_HAL_ED_WEP40;
0524         break;
0525     case WLAN_CIPHER_SUITE_WEP104:
0526         vif_priv->encrypt_type = WCN36XX_HAL_ED_WEP104;
0527         break;
0528     case WLAN_CIPHER_SUITE_CCMP:
0529         vif_priv->encrypt_type = WCN36XX_HAL_ED_CCMP;
0530         break;
0531     case WLAN_CIPHER_SUITE_TKIP:
0532         vif_priv->encrypt_type = WCN36XX_HAL_ED_TKIP;
0533         break;
0534     default:
0535         wcn36xx_err("Unsupported key type 0x%x\n",
0536                   key_conf->cipher);
0537         ret = -EOPNOTSUPP;
0538         goto out;
0539     }
0540 
0541     switch (cmd) {
0542     case SET_KEY:
0543         if (WCN36XX_HAL_ED_TKIP == vif_priv->encrypt_type) {
0544             /*
0545              * Supplicant is sending key in the wrong order:
0546              * Temporal Key (16 b) - TX MIC (8 b) - RX MIC (8 b)
0547              * but HW expects it to be in the order as described in
0548              * IEEE 802.11 spec (see chapter 11.7) like this:
0549              * Temporal Key (16 b) - RX MIC (8 b) - TX MIC (8 b)
0550              */
0551             memcpy(key, key_conf->key, 16);
0552             memcpy(key + 16, key_conf->key + 24, 8);
0553             memcpy(key + 24, key_conf->key + 16, 8);
0554         } else {
0555             memcpy(key, key_conf->key, key_conf->keylen);
0556         }
0557 
0558         if (IEEE80211_KEY_FLAG_PAIRWISE & key_conf->flags) {
0559             sta_priv->is_data_encrypted = true;
0560             /* Reconfigure bss with encrypt_type */
0561             if (NL80211_IFTYPE_STATION == vif->type) {
0562                 wcn36xx_smd_config_bss(wcn,
0563                                vif,
0564                                sta,
0565                                sta->addr,
0566                                true);
0567                 wcn36xx_smd_config_sta(wcn, vif, sta);
0568             }
0569 
0570             wcn36xx_smd_set_stakey(wcn,
0571                 vif_priv->encrypt_type,
0572                 key_conf->keyidx,
0573                 key_conf->keylen,
0574                 key,
0575                 get_sta_index(vif, sta_priv));
0576         } else {
0577             wcn36xx_smd_set_bsskey(wcn,
0578                 vif_priv->encrypt_type,
0579                 vif_priv->bss_index,
0580                 key_conf->keyidx,
0581                 key_conf->keylen,
0582                 key);
0583 
0584             if ((WLAN_CIPHER_SUITE_WEP40 == key_conf->cipher) ||
0585                 (WLAN_CIPHER_SUITE_WEP104 == key_conf->cipher)) {
0586                 list_for_each_entry(sta_priv,
0587                             &vif_priv->sta_list, list) {
0588                     sta_priv->is_data_encrypted = true;
0589                     wcn36xx_smd_set_stakey(wcn,
0590                         vif_priv->encrypt_type,
0591                         key_conf->keyidx,
0592                         key_conf->keylen,
0593                         key,
0594                         get_sta_index(vif, sta_priv));
0595                 }
0596             }
0597         }
0598         break;
0599     case DISABLE_KEY:
0600         if (!(IEEE80211_KEY_FLAG_PAIRWISE & key_conf->flags)) {
0601             if (vif_priv->bss_index != WCN36XX_HAL_BSS_INVALID_IDX)
0602                 wcn36xx_smd_remove_bsskey(wcn,
0603                     vif_priv->encrypt_type,
0604                     vif_priv->bss_index,
0605                     key_conf->keyidx);
0606 
0607             vif_priv->encrypt_type = WCN36XX_HAL_ED_NONE;
0608         } else {
0609             sta_priv->is_data_encrypted = false;
0610             /* do not remove key if disassociated */
0611             if (sta_priv->aid)
0612                 wcn36xx_smd_remove_stakey(wcn,
0613                     vif_priv->encrypt_type,
0614                     key_conf->keyidx,
0615                     get_sta_index(vif, sta_priv));
0616         }
0617         break;
0618     default:
0619         wcn36xx_err("Unsupported key cmd 0x%x\n", cmd);
0620         ret = -EOPNOTSUPP;
0621         goto out;
0622     }
0623 
0624 out:
0625     mutex_unlock(&wcn->conf_mutex);
0626 
0627     return ret;
0628 }
0629 
0630 static int wcn36xx_hw_scan(struct ieee80211_hw *hw,
0631                struct ieee80211_vif *vif,
0632                struct ieee80211_scan_request *hw_req)
0633 {
0634     struct wcn36xx *wcn = hw->priv;
0635 
0636     if (!wcn36xx_firmware_get_feat_caps(wcn->fw_feat_caps, SCAN_OFFLOAD)) {
0637         /* fallback to mac80211 software scan */
0638         return 1;
0639     }
0640 
0641     /* Firmware scan offload is limited to 48 channels, fallback to
0642      * software driven scanning otherwise.
0643      */
0644     if (hw_req->req.n_channels > 48) {
0645         wcn36xx_warn("Offload scan aborted, n_channels=%u",
0646                  hw_req->req.n_channels);
0647         return 1;
0648     }
0649 
0650     mutex_lock(&wcn->scan_lock);
0651     if (wcn->scan_req) {
0652         mutex_unlock(&wcn->scan_lock);
0653         return -EBUSY;
0654     }
0655 
0656     wcn->scan_aborted = false;
0657     wcn->scan_req = &hw_req->req;
0658 
0659     mutex_unlock(&wcn->scan_lock);
0660 
0661     wcn36xx_smd_update_channel_list(wcn, &hw_req->req);
0662     return wcn36xx_smd_start_hw_scan(wcn, vif, &hw_req->req);
0663 }
0664 
0665 static void wcn36xx_cancel_hw_scan(struct ieee80211_hw *hw,
0666                    struct ieee80211_vif *vif)
0667 {
0668     struct wcn36xx *wcn = hw->priv;
0669 
0670     mutex_lock(&wcn->scan_lock);
0671     wcn->scan_aborted = true;
0672     mutex_unlock(&wcn->scan_lock);
0673 
0674     if (wcn36xx_firmware_get_feat_caps(wcn->fw_feat_caps, SCAN_OFFLOAD)) {
0675         /* ieee80211_scan_completed will be called on FW scan
0676          * indication */
0677         wcn36xx_smd_stop_hw_scan(wcn);
0678     }
0679 }
0680 
0681 static void wcn36xx_sw_scan_start(struct ieee80211_hw *hw,
0682                   struct ieee80211_vif *vif,
0683                   const u8 *mac_addr)
0684 {
0685     struct wcn36xx *wcn = hw->priv;
0686     struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
0687 
0688     wcn36xx_dbg(WCN36XX_DBG_MAC, "sw_scan_start");
0689 
0690     wcn->sw_scan = true;
0691     wcn->sw_scan_vif = vif;
0692     wcn->sw_scan_channel = 0;
0693     if (vif_priv->sta_assoc)
0694         wcn->sw_scan_opchannel = WCN36XX_HW_CHANNEL(wcn);
0695     else
0696         wcn->sw_scan_opchannel = 0;
0697 }
0698 
0699 static void wcn36xx_sw_scan_complete(struct ieee80211_hw *hw,
0700                      struct ieee80211_vif *vif)
0701 {
0702     struct wcn36xx *wcn = hw->priv;
0703 
0704     wcn36xx_dbg(WCN36XX_DBG_MAC, "sw_scan_complete");
0705 
0706     /* ensure that any scan session is finished */
0707     if (wcn->sw_scan_channel)
0708         wcn36xx_smd_end_scan(wcn, wcn->sw_scan_channel);
0709     if (wcn->sw_scan_init) {
0710         wcn36xx_smd_finish_scan(wcn, HAL_SYS_MODE_SCAN,
0711                     wcn->sw_scan_vif);
0712     }
0713     wcn->sw_scan = false;
0714     wcn->sw_scan_opchannel = 0;
0715 }
0716 
0717 static void wcn36xx_update_allowed_rates(struct ieee80211_sta *sta,
0718                      enum nl80211_band band)
0719 {
0720     int i, size;
0721     u16 *rates_table;
0722     struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(sta);
0723     u32 rates = sta->deflink.supp_rates[band];
0724 
0725     memset(&sta_priv->supported_rates, 0,
0726         sizeof(sta_priv->supported_rates));
0727     sta_priv->supported_rates.op_rate_mode = STA_11n;
0728 
0729     size = ARRAY_SIZE(sta_priv->supported_rates.dsss_rates);
0730     rates_table = sta_priv->supported_rates.dsss_rates;
0731     if (band == NL80211_BAND_2GHZ) {
0732         for (i = 0; i < size; i++) {
0733             if (rates & 0x01) {
0734                 rates_table[i] = wcn_2ghz_rates[i].hw_value;
0735                 rates = rates >> 1;
0736             }
0737         }
0738     }
0739 
0740     size = ARRAY_SIZE(sta_priv->supported_rates.ofdm_rates);
0741     rates_table = sta_priv->supported_rates.ofdm_rates;
0742     for (i = 0; i < size; i++) {
0743         if (rates & 0x01) {
0744             rates_table[i] = wcn_5ghz_rates[i].hw_value;
0745             rates = rates >> 1;
0746         }
0747     }
0748 
0749     if (sta->deflink.ht_cap.ht_supported) {
0750         BUILD_BUG_ON(sizeof(sta->deflink.ht_cap.mcs.rx_mask) >
0751                  sizeof(sta_priv->supported_rates.supported_mcs_set));
0752         memcpy(sta_priv->supported_rates.supported_mcs_set,
0753                sta->deflink.ht_cap.mcs.rx_mask,
0754                sizeof(sta->deflink.ht_cap.mcs.rx_mask));
0755     }
0756 
0757     if (sta->deflink.vht_cap.vht_supported) {
0758         sta_priv->supported_rates.op_rate_mode = STA_11ac;
0759         sta_priv->supported_rates.vht_rx_mcs_map =
0760                 sta->deflink.vht_cap.vht_mcs.rx_mcs_map;
0761         sta_priv->supported_rates.vht_tx_mcs_map =
0762                 sta->deflink.vht_cap.vht_mcs.tx_mcs_map;
0763     }
0764 }
0765 
0766 void wcn36xx_set_default_rates(struct wcn36xx_hal_supported_rates *rates)
0767 {
0768     u16 ofdm_rates[WCN36XX_HAL_NUM_OFDM_RATES] = {
0769         HW_RATE_INDEX_6MBPS,
0770         HW_RATE_INDEX_9MBPS,
0771         HW_RATE_INDEX_12MBPS,
0772         HW_RATE_INDEX_18MBPS,
0773         HW_RATE_INDEX_24MBPS,
0774         HW_RATE_INDEX_36MBPS,
0775         HW_RATE_INDEX_48MBPS,
0776         HW_RATE_INDEX_54MBPS
0777     };
0778     u16 dsss_rates[WCN36XX_HAL_NUM_DSSS_RATES] = {
0779         HW_RATE_INDEX_1MBPS,
0780         HW_RATE_INDEX_2MBPS,
0781         HW_RATE_INDEX_5_5MBPS,
0782         HW_RATE_INDEX_11MBPS
0783     };
0784 
0785     rates->op_rate_mode = STA_11n;
0786     memcpy(rates->dsss_rates, dsss_rates,
0787         sizeof(*dsss_rates) * WCN36XX_HAL_NUM_DSSS_RATES);
0788     memcpy(rates->ofdm_rates, ofdm_rates,
0789         sizeof(*ofdm_rates) * WCN36XX_HAL_NUM_OFDM_RATES);
0790     rates->supported_mcs_set[0] = 0xFF;
0791 }
0792 
0793 void wcn36xx_set_default_rates_v1(struct wcn36xx_hal_supported_rates_v1 *rates)
0794 {
0795     rates->op_rate_mode = STA_11ac;
0796     rates->vht_rx_mcs_map = IEEE80211_VHT_MCS_SUPPORT_0_9;
0797     rates->vht_tx_mcs_map = IEEE80211_VHT_MCS_SUPPORT_0_9;
0798 }
0799 
0800 static void wcn36xx_bss_info_changed(struct ieee80211_hw *hw,
0801                      struct ieee80211_vif *vif,
0802                      struct ieee80211_bss_conf *bss_conf,
0803                      u64 changed)
0804 {
0805     struct wcn36xx *wcn = hw->priv;
0806     struct sk_buff *skb = NULL;
0807     u16 tim_off, tim_len;
0808     enum wcn36xx_hal_link_state link_state;
0809     struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
0810 
0811     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss info changed vif %p changed 0x%llx\n",
0812             vif, changed);
0813 
0814     mutex_lock(&wcn->conf_mutex);
0815 
0816     if (changed & BSS_CHANGED_BEACON_INFO) {
0817         wcn36xx_dbg(WCN36XX_DBG_MAC,
0818                 "mac bss changed dtim period %d\n",
0819                 bss_conf->dtim_period);
0820 
0821         vif_priv->dtim_period = bss_conf->dtim_period;
0822     }
0823 
0824     if (changed & BSS_CHANGED_BSSID) {
0825         wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss changed_bssid %pM\n",
0826                 bss_conf->bssid);
0827 
0828         if (!is_zero_ether_addr(bss_conf->bssid)) {
0829             vif_priv->is_joining = true;
0830             vif_priv->bss_index = WCN36XX_HAL_BSS_INVALID_IDX;
0831             wcn36xx_smd_set_link_st(wcn, bss_conf->bssid, vif->addr,
0832                         WCN36XX_HAL_LINK_PREASSOC_STATE);
0833             wcn36xx_smd_join(wcn, bss_conf->bssid,
0834                      vif->addr, WCN36XX_HW_CHANNEL(wcn));
0835             wcn36xx_smd_config_bss(wcn, vif, NULL,
0836                            bss_conf->bssid, false);
0837         } else {
0838             vif_priv->is_joining = false;
0839             wcn36xx_smd_delete_bss(wcn, vif);
0840             wcn36xx_smd_set_link_st(wcn, bss_conf->bssid, vif->addr,
0841                         WCN36XX_HAL_LINK_IDLE_STATE);
0842             vif_priv->encrypt_type = WCN36XX_HAL_ED_NONE;
0843         }
0844     }
0845 
0846     if (changed & BSS_CHANGED_SSID) {
0847         wcn36xx_dbg(WCN36XX_DBG_MAC,
0848                 "mac bss changed ssid\n");
0849         wcn36xx_dbg_dump(WCN36XX_DBG_MAC, "ssid ",
0850                  vif->cfg.ssid, vif->cfg.ssid_len);
0851 
0852         vif_priv->ssid.length = vif->cfg.ssid_len;
0853         memcpy(&vif_priv->ssid.ssid,
0854                vif->cfg.ssid,
0855                vif->cfg.ssid_len);
0856     }
0857 
0858     if (changed & BSS_CHANGED_ASSOC) {
0859         vif_priv->is_joining = false;
0860         if (vif->cfg.assoc) {
0861             struct ieee80211_sta *sta;
0862             struct wcn36xx_sta *sta_priv;
0863 
0864             wcn36xx_dbg(WCN36XX_DBG_MAC,
0865                     "mac assoc bss %pM vif %pM AID=%d\n",
0866                      bss_conf->bssid,
0867                      vif->addr,
0868                      vif->cfg.aid);
0869 
0870             vif_priv->sta_assoc = true;
0871 
0872             /*
0873              * Holding conf_mutex ensures mutal exclusion with
0874              * wcn36xx_sta_remove() and as such ensures that sta
0875              * won't be freed while we're operating on it. As such
0876              * we do not need to hold the rcu_read_lock().
0877              */
0878             sta = ieee80211_find_sta(vif, bss_conf->bssid);
0879             if (!sta) {
0880                 wcn36xx_err("sta %pM is not found\n",
0881                           bss_conf->bssid);
0882                 goto out;
0883             }
0884             sta_priv = wcn36xx_sta_to_priv(sta);
0885 
0886             wcn36xx_update_allowed_rates(sta, WCN36XX_BAND(wcn));
0887 
0888             wcn36xx_smd_set_link_st(wcn, bss_conf->bssid,
0889                 vif->addr,
0890                 WCN36XX_HAL_LINK_POSTASSOC_STATE);
0891             wcn36xx_smd_config_bss(wcn, vif, sta,
0892                            bss_conf->bssid,
0893                            true);
0894             sta_priv->aid = vif->cfg.aid;
0895             /*
0896              * config_sta must be called from  because this is the
0897              * place where AID is available.
0898              */
0899             wcn36xx_smd_config_sta(wcn, vif, sta);
0900             if (vif->type == NL80211_IFTYPE_STATION)
0901                 wcn36xx_smd_add_beacon_filter(wcn, vif);
0902             wcn36xx_enable_keep_alive_null_packet(wcn, vif);
0903         } else {
0904             wcn36xx_dbg(WCN36XX_DBG_MAC,
0905                     "disassociated bss %pM vif %pM AID=%d\n",
0906                     bss_conf->bssid,
0907                     vif->addr,
0908                     vif->cfg.aid);
0909             vif_priv->sta_assoc = false;
0910             wcn36xx_smd_set_link_st(wcn,
0911                         bss_conf->bssid,
0912                         vif->addr,
0913                         WCN36XX_HAL_LINK_IDLE_STATE);
0914         }
0915     }
0916 
0917     if (changed & BSS_CHANGED_AP_PROBE_RESP) {
0918         wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss changed ap probe resp\n");
0919         skb = ieee80211_proberesp_get(hw, vif);
0920         if (!skb) {
0921             wcn36xx_err("failed to alloc probereq skb\n");
0922             goto out;
0923         }
0924 
0925         wcn36xx_smd_update_proberesp_tmpl(wcn, vif, skb);
0926         dev_kfree_skb(skb);
0927     }
0928 
0929     if (changed & BSS_CHANGED_BEACON_ENABLED ||
0930         changed & BSS_CHANGED_BEACON) {
0931         wcn36xx_dbg(WCN36XX_DBG_MAC,
0932                 "mac bss changed beacon enabled %d\n",
0933                 bss_conf->enable_beacon);
0934 
0935         if (bss_conf->enable_beacon) {
0936             vif_priv->dtim_period = bss_conf->dtim_period;
0937             vif_priv->bss_index = WCN36XX_HAL_BSS_INVALID_IDX;
0938             wcn36xx_smd_config_bss(wcn, vif, NULL,
0939                            vif->addr, false);
0940             skb = ieee80211_beacon_get_tim(hw, vif, &tim_off,
0941                                &tim_len, 0);
0942             if (!skb) {
0943                 wcn36xx_err("failed to alloc beacon skb\n");
0944                 goto out;
0945             }
0946             wcn36xx_smd_send_beacon(wcn, vif, skb, tim_off, 0);
0947             dev_kfree_skb(skb);
0948 
0949             if (vif->type == NL80211_IFTYPE_ADHOC ||
0950                 vif->type == NL80211_IFTYPE_MESH_POINT)
0951                 link_state = WCN36XX_HAL_LINK_IBSS_STATE;
0952             else
0953                 link_state = WCN36XX_HAL_LINK_AP_STATE;
0954 
0955             wcn36xx_smd_set_link_st(wcn, vif->addr, vif->addr,
0956                         link_state);
0957         } else {
0958             wcn36xx_smd_delete_bss(wcn, vif);
0959             wcn36xx_smd_set_link_st(wcn, vif->addr, vif->addr,
0960                         WCN36XX_HAL_LINK_IDLE_STATE);
0961         }
0962     }
0963 out:
0964 
0965     mutex_unlock(&wcn->conf_mutex);
0966 }
0967 
0968 /* this is required when using IEEE80211_HW_HAS_RATE_CONTROL */
0969 static int wcn36xx_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
0970 {
0971     struct wcn36xx *wcn = hw->priv;
0972     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac set RTS threshold %d\n", value);
0973 
0974     mutex_lock(&wcn->conf_mutex);
0975     wcn36xx_smd_update_cfg(wcn, WCN36XX_HAL_CFG_RTS_THRESHOLD, value);
0976     mutex_unlock(&wcn->conf_mutex);
0977 
0978     return 0;
0979 }
0980 
0981 static void wcn36xx_remove_interface(struct ieee80211_hw *hw,
0982                      struct ieee80211_vif *vif)
0983 {
0984     struct wcn36xx *wcn = hw->priv;
0985     struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
0986     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac remove interface vif %p\n", vif);
0987 
0988     mutex_lock(&wcn->conf_mutex);
0989 
0990     list_del(&vif_priv->list);
0991     wcn36xx_smd_delete_sta_self(wcn, vif->addr);
0992 
0993     mutex_unlock(&wcn->conf_mutex);
0994 }
0995 
0996 static int wcn36xx_add_interface(struct ieee80211_hw *hw,
0997                  struct ieee80211_vif *vif)
0998 {
0999     struct wcn36xx *wcn = hw->priv;
1000     struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
1001 
1002     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac add interface vif %p type %d\n",
1003             vif, vif->type);
1004 
1005     if (!(NL80211_IFTYPE_STATION == vif->type ||
1006           NL80211_IFTYPE_AP == vif->type ||
1007           NL80211_IFTYPE_ADHOC == vif->type ||
1008           NL80211_IFTYPE_MESH_POINT == vif->type)) {
1009         wcn36xx_warn("Unsupported interface type requested: %d\n",
1010                  vif->type);
1011         return -EOPNOTSUPP;
1012     }
1013 
1014     mutex_lock(&wcn->conf_mutex);
1015 
1016     vif_priv->bss_index = WCN36XX_HAL_BSS_INVALID_IDX;
1017     INIT_LIST_HEAD(&vif_priv->sta_list);
1018     list_add(&vif_priv->list, &wcn->vif_list);
1019     wcn36xx_smd_add_sta_self(wcn, vif);
1020 
1021     mutex_unlock(&wcn->conf_mutex);
1022 
1023     return 0;
1024 }
1025 
1026 static int wcn36xx_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1027                struct ieee80211_sta *sta)
1028 {
1029     struct wcn36xx *wcn = hw->priv;
1030     struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
1031     struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(sta);
1032     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac sta add vif %p sta %pM\n",
1033             vif, sta->addr);
1034 
1035     mutex_lock(&wcn->conf_mutex);
1036 
1037     spin_lock_init(&sta_priv->ampdu_lock);
1038     sta_priv->vif = vif_priv;
1039     list_add(&sta_priv->list, &vif_priv->sta_list);
1040 
1041     /*
1042      * For STA mode HW will be configured on BSS_CHANGED_ASSOC because
1043      * at this stage AID is not available yet.
1044      */
1045     if (NL80211_IFTYPE_STATION != vif->type) {
1046         wcn36xx_update_allowed_rates(sta, WCN36XX_BAND(wcn));
1047         sta_priv->aid = sta->aid;
1048         wcn36xx_smd_config_sta(wcn, vif, sta);
1049     }
1050 
1051     mutex_unlock(&wcn->conf_mutex);
1052 
1053     return 0;
1054 }
1055 
1056 static int wcn36xx_sta_remove(struct ieee80211_hw *hw,
1057                   struct ieee80211_vif *vif,
1058                   struct ieee80211_sta *sta)
1059 {
1060     struct wcn36xx *wcn = hw->priv;
1061     struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(sta);
1062 
1063     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac sta remove vif %p sta %pM index %d\n",
1064             vif, sta->addr, sta_priv->sta_index);
1065 
1066     mutex_lock(&wcn->conf_mutex);
1067 
1068     list_del(&sta_priv->list);
1069     wcn36xx_smd_delete_sta(wcn, sta_priv->sta_index);
1070     sta_priv->vif = NULL;
1071 
1072     mutex_unlock(&wcn->conf_mutex);
1073 
1074     return 0;
1075 }
1076 
1077 #ifdef CONFIG_PM
1078 
1079 static struct ieee80211_vif *wcn36xx_get_first_assoc_vif(struct wcn36xx *wcn)
1080 {
1081     struct wcn36xx_vif *vif_priv = NULL;
1082     struct ieee80211_vif *vif = NULL;
1083 
1084     list_for_each_entry(vif_priv, &wcn->vif_list, list) {
1085         if (vif_priv->sta_assoc) {
1086             vif = wcn36xx_priv_to_vif(vif_priv);
1087             break;
1088         }
1089     }
1090     return vif;
1091 }
1092 
1093 static int wcn36xx_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wow)
1094 {
1095     struct wcn36xx *wcn = hw->priv;
1096     struct ieee80211_vif *vif = NULL;
1097     int ret = 0;
1098 
1099     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac suspend\n");
1100 
1101     mutex_lock(&wcn->conf_mutex);
1102 
1103     vif = wcn36xx_get_first_assoc_vif(wcn);
1104     if (vif) {
1105         ret = wcn36xx_smd_arp_offload(wcn, vif, true);
1106         if (ret)
1107             goto out;
1108         ret = wcn36xx_smd_ipv6_ns_offload(wcn, vif, true);
1109         if (ret)
1110             goto out;
1111         ret = wcn36xx_smd_gtk_offload(wcn, vif, true);
1112         if (ret)
1113             goto out;
1114         ret = wcn36xx_smd_set_power_params(wcn, true);
1115         if (ret)
1116             goto out;
1117         ret = wcn36xx_smd_wlan_host_suspend_ind(wcn);
1118     }
1119 
1120     /* Disable IRQ, we don't want to handle any packet before mac80211 is
1121      * resumed and ready to receive packets.
1122      */
1123     disable_irq(wcn->tx_irq);
1124     disable_irq(wcn->rx_irq);
1125 
1126 out:
1127     mutex_unlock(&wcn->conf_mutex);
1128     return ret;
1129 }
1130 
1131 static int wcn36xx_resume(struct ieee80211_hw *hw)
1132 {
1133     struct wcn36xx *wcn = hw->priv;
1134     struct ieee80211_vif *vif = NULL;
1135 
1136     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac resume\n");
1137 
1138     mutex_lock(&wcn->conf_mutex);
1139     vif = wcn36xx_get_first_assoc_vif(wcn);
1140     if (vif) {
1141         wcn36xx_smd_host_resume(wcn);
1142         wcn36xx_smd_set_power_params(wcn, false);
1143         wcn36xx_smd_gtk_offload_get_info(wcn, vif);
1144         wcn36xx_smd_gtk_offload(wcn, vif, false);
1145         wcn36xx_smd_ipv6_ns_offload(wcn, vif, false);
1146         wcn36xx_smd_arp_offload(wcn, vif, false);
1147     }
1148 
1149     enable_irq(wcn->tx_irq);
1150     enable_irq(wcn->rx_irq);
1151 
1152     mutex_unlock(&wcn->conf_mutex);
1153 
1154     return 0;
1155 }
1156 
1157 static void wcn36xx_set_rekey_data(struct ieee80211_hw *hw,
1158                    struct ieee80211_vif *vif,
1159                    struct cfg80211_gtk_rekey_data *data)
1160 {
1161     struct wcn36xx *wcn = hw->priv;
1162     struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
1163 
1164     mutex_lock(&wcn->conf_mutex);
1165 
1166     memcpy(vif_priv->rekey_data.kek, data->kek, NL80211_KEK_LEN);
1167     memcpy(vif_priv->rekey_data.kck, data->kck, NL80211_KCK_LEN);
1168     vif_priv->rekey_data.replay_ctr =
1169         cpu_to_le64(be64_to_cpup((__be64 *)data->replay_ctr));
1170     vif_priv->rekey_data.valid = true;
1171 
1172     mutex_unlock(&wcn->conf_mutex);
1173 }
1174 
1175 #endif
1176 
1177 static int wcn36xx_ampdu_action(struct ieee80211_hw *hw,
1178             struct ieee80211_vif *vif,
1179             struct ieee80211_ampdu_params *params)
1180 {
1181     struct wcn36xx *wcn = hw->priv;
1182     struct wcn36xx_sta *sta_priv = wcn36xx_sta_to_priv(params->sta);
1183     struct ieee80211_sta *sta = params->sta;
1184     enum ieee80211_ampdu_mlme_action action = params->action;
1185     u16 tid = params->tid;
1186     u16 *ssn = &params->ssn;
1187     int ret = 0;
1188     int session;
1189 
1190     wcn36xx_dbg(WCN36XX_DBG_MAC, "mac ampdu action action %d tid %d\n",
1191             action, tid);
1192 
1193     mutex_lock(&wcn->conf_mutex);
1194 
1195     switch (action) {
1196     case IEEE80211_AMPDU_RX_START:
1197         sta_priv->tid = tid;
1198         session = wcn36xx_smd_add_ba_session(wcn, sta, tid, ssn, 0,
1199                              get_sta_index(vif, sta_priv));
1200         if (session < 0) {
1201             ret = session;
1202             goto out;
1203         }
1204         wcn36xx_smd_add_ba(wcn, session);
1205         break;
1206     case IEEE80211_AMPDU_RX_STOP:
1207         wcn36xx_smd_del_ba(wcn, tid, 0, get_sta_index(vif, sta_priv));
1208         break;
1209     case IEEE80211_AMPDU_TX_START:
1210         spin_lock_bh(&sta_priv->ampdu_lock);
1211         sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_START;
1212         spin_unlock_bh(&sta_priv->ampdu_lock);
1213 
1214         /* Replace the mac80211 ssn with the firmware one */
1215         wcn36xx_dbg(WCN36XX_DBG_MAC, "mac ampdu ssn = %u\n", *ssn);
1216         wcn36xx_smd_trigger_ba(wcn, get_sta_index(vif, sta_priv), tid, ssn);
1217         wcn36xx_dbg(WCN36XX_DBG_MAC, "mac ampdu fw-ssn = %u\n", *ssn);
1218 
1219         /* Start BA session */
1220         session = wcn36xx_smd_add_ba_session(wcn, sta, tid, ssn, 1,
1221                              get_sta_index(vif, sta_priv));
1222         if (session < 0) {
1223             ret = session;
1224             goto out;
1225         }
1226         ret = IEEE80211_AMPDU_TX_START_IMMEDIATE;
1227         break;
1228     case IEEE80211_AMPDU_TX_OPERATIONAL:
1229         spin_lock_bh(&sta_priv->ampdu_lock);
1230         sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_OPERATIONAL;
1231         spin_unlock_bh(&sta_priv->ampdu_lock);
1232 
1233         break;
1234     case IEEE80211_AMPDU_TX_STOP_FLUSH:
1235     case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1236     case IEEE80211_AMPDU_TX_STOP_CONT:
1237         spin_lock_bh(&sta_priv->ampdu_lock);
1238         sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_NONE;
1239         spin_unlock_bh(&sta_priv->ampdu_lock);
1240 
1241         wcn36xx_smd_del_ba(wcn, tid, 1, get_sta_index(vif, sta_priv));
1242         ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1243         break;
1244     default:
1245         wcn36xx_err("Unknown AMPDU action\n");
1246     }
1247 
1248 out:
1249     mutex_unlock(&wcn->conf_mutex);
1250 
1251     return ret;
1252 }
1253 
1254 #if IS_ENABLED(CONFIG_IPV6)
1255 static void wcn36xx_ipv6_addr_change(struct ieee80211_hw *hw,
1256                      struct ieee80211_vif *vif,
1257                      struct inet6_dev *idev)
1258 {
1259     struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif);
1260     struct inet6_ifaddr *ifa;
1261     int idx = 0;
1262 
1263     memset(vif_priv->tentative_addrs, 0, sizeof(vif_priv->tentative_addrs));
1264 
1265     read_lock_bh(&idev->lock);
1266     list_for_each_entry(ifa, &idev->addr_list, if_list) {
1267         vif_priv->target_ipv6_addrs[idx] = ifa->addr;
1268         if (ifa->flags & IFA_F_TENTATIVE)
1269             __set_bit(idx, vif_priv->tentative_addrs);
1270         idx++;
1271         if (idx >= WCN36XX_HAL_IPV6_OFFLOAD_ADDR_MAX)
1272             break;
1273         wcn36xx_dbg(WCN36XX_DBG_MAC, "%pI6 %s\n", &ifa->addr,
1274                 (ifa->flags & IFA_F_TENTATIVE) ? "tentative" : NULL);
1275     }
1276     read_unlock_bh(&idev->lock);
1277 
1278     vif_priv->num_target_ipv6_addrs = idx;
1279 }
1280 #endif
1281 
1282 static void wcn36xx_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1283               u32 queues, bool drop)
1284 {
1285     struct wcn36xx *wcn = hw->priv;
1286 
1287     if (wcn36xx_dxe_tx_flush(wcn)) {
1288         wcn36xx_err("Failed to flush hardware tx queues\n");
1289     }
1290 }
1291 
1292 static int wcn36xx_get_survey(struct ieee80211_hw *hw, int idx,
1293                   struct survey_info *survey)
1294 {
1295     struct wcn36xx *wcn = hw->priv;
1296     struct ieee80211_supported_band *sband;
1297     struct wcn36xx_chan_survey *chan_survey;
1298     int band_idx;
1299     unsigned long flags;
1300 
1301     sband = wcn->hw->wiphy->bands[NL80211_BAND_2GHZ];
1302     band_idx = idx;
1303     if (band_idx >= sband->n_channels) {
1304         band_idx -= sband->n_channels;
1305         sband = wcn->hw->wiphy->bands[NL80211_BAND_5GHZ];
1306     }
1307 
1308     if (!sband || band_idx >= sband->n_channels)
1309         return -ENOENT;
1310 
1311     spin_lock_irqsave(&wcn->survey_lock, flags);
1312 
1313     chan_survey = &wcn->chan_survey[idx];
1314     survey->channel = &sband->channels[band_idx];
1315     survey->noise = chan_survey->rssi - chan_survey->snr;
1316     survey->filled = 0;
1317 
1318     if (chan_survey->rssi > -100 && chan_survey->rssi < 0)
1319         survey->filled |= SURVEY_INFO_NOISE_DBM;
1320 
1321     if (survey->channel == wcn->channel)
1322         survey->filled |= SURVEY_INFO_IN_USE;
1323 
1324     spin_unlock_irqrestore(&wcn->survey_lock, flags);
1325 
1326     wcn36xx_dbg(WCN36XX_DBG_MAC,
1327             "ch %d rssi %d snr %d noise %d filled %x freq %d\n",
1328             HW_VALUE_CHANNEL(survey->channel->hw_value),
1329             chan_survey->rssi, chan_survey->snr, survey->noise,
1330             survey->filled, survey->channel->center_freq);
1331 
1332     return 0;
1333 }
1334 
1335 static void wcn36xx_sta_statistics(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1336                    struct ieee80211_sta *sta, struct station_info *sinfo)
1337 {
1338     struct wcn36xx *wcn;
1339     u8 sta_index;
1340     int status;
1341 
1342     wcn = hw->priv;
1343     sta_index = get_sta_index(vif, wcn36xx_sta_to_priv(sta));
1344     status = wcn36xx_smd_get_stats(wcn, sta_index, HAL_GLOBAL_CLASS_A_STATS_INFO, sinfo);
1345 
1346     if (status)
1347         wcn36xx_err("wcn36xx_smd_get_stats failed\n");
1348 }
1349 
1350 static const struct ieee80211_ops wcn36xx_ops = {
1351     .start          = wcn36xx_start,
1352     .stop           = wcn36xx_stop,
1353     .add_interface      = wcn36xx_add_interface,
1354     .remove_interface   = wcn36xx_remove_interface,
1355 #ifdef CONFIG_PM
1356     .suspend        = wcn36xx_suspend,
1357     .resume         = wcn36xx_resume,
1358     .set_rekey_data     = wcn36xx_set_rekey_data,
1359 #endif
1360     .config         = wcn36xx_config,
1361     .prepare_multicast  = wcn36xx_prepare_multicast,
1362     .configure_filter       = wcn36xx_configure_filter,
1363     .tx         = wcn36xx_tx,
1364     .set_key        = wcn36xx_set_key,
1365     .hw_scan        = wcn36xx_hw_scan,
1366     .cancel_hw_scan     = wcn36xx_cancel_hw_scan,
1367     .sw_scan_start      = wcn36xx_sw_scan_start,
1368     .sw_scan_complete   = wcn36xx_sw_scan_complete,
1369     .bss_info_changed   = wcn36xx_bss_info_changed,
1370     .set_rts_threshold  = wcn36xx_set_rts_threshold,
1371     .sta_add        = wcn36xx_sta_add,
1372     .sta_remove     = wcn36xx_sta_remove,
1373     .sta_statistics     = wcn36xx_sta_statistics,
1374     .ampdu_action       = wcn36xx_ampdu_action,
1375 #if IS_ENABLED(CONFIG_IPV6)
1376     .ipv6_addr_change   = wcn36xx_ipv6_addr_change,
1377 #endif
1378     .flush          = wcn36xx_flush,
1379     .get_survey     = wcn36xx_get_survey,
1380 
1381     CFG80211_TESTMODE_CMD(wcn36xx_tm_cmd)
1382 };
1383 
1384 static void
1385 wcn36xx_set_ieee80211_vht_caps(struct ieee80211_sta_vht_cap *vht_cap)
1386 {
1387     vht_cap->vht_supported = true;
1388 
1389     vht_cap->cap = (IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895 |
1390             IEEE80211_VHT_CAP_SHORT_GI_80 |
1391             IEEE80211_VHT_CAP_RXSTBC_1 |
1392             IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
1393             IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE |
1394             3 << IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT |
1395             7 << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
1396 
1397     vht_cap->vht_mcs.rx_mcs_map =
1398         cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 |
1399                 IEEE80211_VHT_MCS_NOT_SUPPORTED << 2 |
1400                 IEEE80211_VHT_MCS_NOT_SUPPORTED << 4 |
1401                 IEEE80211_VHT_MCS_NOT_SUPPORTED << 6 |
1402                 IEEE80211_VHT_MCS_NOT_SUPPORTED << 8 |
1403                 IEEE80211_VHT_MCS_NOT_SUPPORTED << 10 |
1404                 IEEE80211_VHT_MCS_NOT_SUPPORTED << 12 |
1405                 IEEE80211_VHT_MCS_NOT_SUPPORTED << 14);
1406 
1407     vht_cap->vht_mcs.rx_highest = cpu_to_le16(433);
1408     vht_cap->vht_mcs.tx_highest = vht_cap->vht_mcs.rx_highest;
1409 
1410     vht_cap->vht_mcs.tx_mcs_map = vht_cap->vht_mcs.rx_mcs_map;
1411 }
1412 
1413 static int wcn36xx_init_ieee80211(struct wcn36xx *wcn)
1414 {
1415     static const u32 cipher_suites[] = {
1416         WLAN_CIPHER_SUITE_WEP40,
1417         WLAN_CIPHER_SUITE_WEP104,
1418         WLAN_CIPHER_SUITE_TKIP,
1419         WLAN_CIPHER_SUITE_CCMP,
1420     };
1421 
1422     ieee80211_hw_set(wcn->hw, TIMING_BEACON_ONLY);
1423     ieee80211_hw_set(wcn->hw, AMPDU_AGGREGATION);
1424     ieee80211_hw_set(wcn->hw, SUPPORTS_PS);
1425     ieee80211_hw_set(wcn->hw, SIGNAL_DBM);
1426     ieee80211_hw_set(wcn->hw, HAS_RATE_CONTROL);
1427     ieee80211_hw_set(wcn->hw, SINGLE_SCAN_ON_ALL_BANDS);
1428     ieee80211_hw_set(wcn->hw, REPORTS_TX_ACK_STATUS);
1429 
1430     wcn->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1431         BIT(NL80211_IFTYPE_AP) |
1432         BIT(NL80211_IFTYPE_ADHOC) |
1433         BIT(NL80211_IFTYPE_MESH_POINT);
1434 
1435     wcn->hw->wiphy->bands[NL80211_BAND_2GHZ] = &wcn_band_2ghz;
1436     if (wcn->rf_id != RF_IRIS_WCN3620)
1437         wcn->hw->wiphy->bands[NL80211_BAND_5GHZ] = &wcn_band_5ghz;
1438 
1439     if (wcn->rf_id == RF_IRIS_WCN3680)
1440         wcn36xx_set_ieee80211_vht_caps(&wcn_band_5ghz.vht_cap);
1441 
1442     wcn->hw->wiphy->max_scan_ssids = WCN36XX_MAX_SCAN_SSIDS;
1443     wcn->hw->wiphy->max_scan_ie_len = WCN36XX_MAX_SCAN_IE_LEN;
1444 
1445     wcn->hw->wiphy->cipher_suites = cipher_suites;
1446     wcn->hw->wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);
1447 
1448 #ifdef CONFIG_PM
1449     wcn->hw->wiphy->wowlan = &wowlan_support;
1450 #endif
1451 
1452     wcn->hw->max_listen_interval = 200;
1453 
1454     wcn->hw->queues = 4;
1455 
1456     SET_IEEE80211_DEV(wcn->hw, wcn->dev);
1457 
1458     wcn->hw->sta_data_size = sizeof(struct wcn36xx_sta);
1459     wcn->hw->vif_data_size = sizeof(struct wcn36xx_vif);
1460 
1461     wiphy_ext_feature_set(wcn->hw->wiphy,
1462                   NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1463 
1464     return 0;
1465 }
1466 
1467 static int wcn36xx_platform_get_resources(struct wcn36xx *wcn,
1468                       struct platform_device *pdev)
1469 {
1470     struct device_node *mmio_node;
1471     struct device_node *iris_node;
1472     int index;
1473     int ret;
1474 
1475     /* Set TX IRQ */
1476     ret = platform_get_irq_byname(pdev, "tx");
1477     if (ret < 0)
1478         return ret;
1479     wcn->tx_irq = ret;
1480 
1481     /* Set RX IRQ */
1482     ret = platform_get_irq_byname(pdev, "rx");
1483     if (ret < 0)
1484         return ret;
1485     wcn->rx_irq = ret;
1486 
1487     /* Acquire SMSM tx enable handle */
1488     wcn->tx_enable_state = qcom_smem_state_get(&pdev->dev,
1489             "tx-enable", &wcn->tx_enable_state_bit);
1490     if (IS_ERR(wcn->tx_enable_state)) {
1491         wcn36xx_err("failed to get tx-enable state\n");
1492         return PTR_ERR(wcn->tx_enable_state);
1493     }
1494 
1495     /* Acquire SMSM tx rings empty handle */
1496     wcn->tx_rings_empty_state = qcom_smem_state_get(&pdev->dev,
1497             "tx-rings-empty", &wcn->tx_rings_empty_state_bit);
1498     if (IS_ERR(wcn->tx_rings_empty_state)) {
1499         wcn36xx_err("failed to get tx-rings-empty state\n");
1500         return PTR_ERR(wcn->tx_rings_empty_state);
1501     }
1502 
1503     mmio_node = of_parse_phandle(pdev->dev.parent->of_node, "qcom,mmio", 0);
1504     if (!mmio_node) {
1505         wcn36xx_err("failed to acquire qcom,mmio reference\n");
1506         return -EINVAL;
1507     }
1508 
1509     wcn->is_pronto = !!of_device_is_compatible(mmio_node, "qcom,pronto");
1510 
1511     /* Map the CCU memory */
1512     index = of_property_match_string(mmio_node, "reg-names", "ccu");
1513     wcn->ccu_base = of_iomap(mmio_node, index);
1514     if (!wcn->ccu_base) {
1515         wcn36xx_err("failed to map ccu memory\n");
1516         ret = -ENOMEM;
1517         goto put_mmio_node;
1518     }
1519 
1520     /* Map the DXE memory */
1521     index = of_property_match_string(mmio_node, "reg-names", "dxe");
1522     wcn->dxe_base = of_iomap(mmio_node, index);
1523     if (!wcn->dxe_base) {
1524         wcn36xx_err("failed to map dxe memory\n");
1525         ret = -ENOMEM;
1526         goto unmap_ccu;
1527     }
1528 
1529     /* External RF module */
1530     iris_node = of_get_child_by_name(mmio_node, "iris");
1531     if (iris_node) {
1532         if (of_device_is_compatible(iris_node, "qcom,wcn3620"))
1533             wcn->rf_id = RF_IRIS_WCN3620;
1534         if (of_device_is_compatible(iris_node, "qcom,wcn3660") ||
1535             of_device_is_compatible(iris_node, "qcom,wcn3660b"))
1536             wcn->rf_id = RF_IRIS_WCN3660;
1537         if (of_device_is_compatible(iris_node, "qcom,wcn3680"))
1538             wcn->rf_id = RF_IRIS_WCN3680;
1539         of_node_put(iris_node);
1540     }
1541 
1542     of_node_put(mmio_node);
1543     return 0;
1544 
1545 unmap_ccu:
1546     iounmap(wcn->ccu_base);
1547 put_mmio_node:
1548     of_node_put(mmio_node);
1549     return ret;
1550 }
1551 
1552 static int wcn36xx_probe(struct platform_device *pdev)
1553 {
1554     struct ieee80211_hw *hw;
1555     struct wcn36xx *wcn;
1556     void *wcnss;
1557     int ret;
1558     const u8 *addr;
1559     int n_channels;
1560 
1561     wcn36xx_dbg(WCN36XX_DBG_MAC, "platform probe\n");
1562 
1563     wcnss = dev_get_drvdata(pdev->dev.parent);
1564 
1565     hw = ieee80211_alloc_hw(sizeof(struct wcn36xx), &wcn36xx_ops);
1566     if (!hw) {
1567         wcn36xx_err("failed to alloc hw\n");
1568         ret = -ENOMEM;
1569         goto out_err;
1570     }
1571     platform_set_drvdata(pdev, hw);
1572     wcn = hw->priv;
1573     wcn->hw = hw;
1574     wcn->dev = &pdev->dev;
1575     wcn->first_boot = true;
1576     mutex_init(&wcn->conf_mutex);
1577     mutex_init(&wcn->hal_mutex);
1578     mutex_init(&wcn->scan_lock);
1579     __skb_queue_head_init(&wcn->amsdu);
1580 
1581     wcn->hal_buf = devm_kmalloc(wcn->dev, WCN36XX_HAL_BUF_SIZE, GFP_KERNEL);
1582     if (!wcn->hal_buf) {
1583         ret = -ENOMEM;
1584         goto out_wq;
1585     }
1586 
1587     n_channels = wcn_band_2ghz.n_channels + wcn_band_5ghz.n_channels;
1588     wcn->chan_survey = devm_kmalloc(wcn->dev, n_channels, GFP_KERNEL);
1589     if (!wcn->chan_survey) {
1590         ret = -ENOMEM;
1591         goto out_wq;
1592     }
1593 
1594     ret = dma_set_mask_and_coherent(wcn->dev, DMA_BIT_MASK(32));
1595     if (ret < 0) {
1596         wcn36xx_err("failed to set DMA mask: %d\n", ret);
1597         goto out_wq;
1598     }
1599 
1600     wcn->nv_file = WLAN_NV_FILE;
1601     ret = of_property_read_string(wcn->dev->parent->of_node, "firmware-name", &wcn->nv_file);
1602     if (ret < 0 && ret != -EINVAL) {
1603         wcn36xx_err("failed to read \"firmware-name\" property: %d\n", ret);
1604         goto out_wq;
1605     }
1606 
1607     wcn->smd_channel = qcom_wcnss_open_channel(wcnss, "WLAN_CTRL", wcn36xx_smd_rsp_process, hw);
1608     if (IS_ERR(wcn->smd_channel)) {
1609         wcn36xx_err("failed to open WLAN_CTRL channel\n");
1610         ret = PTR_ERR(wcn->smd_channel);
1611         goto out_wq;
1612     }
1613 
1614     addr = of_get_property(pdev->dev.of_node, "local-mac-address", &ret);
1615     if (addr && ret != ETH_ALEN) {
1616         wcn36xx_err("invalid local-mac-address\n");
1617         ret = -EINVAL;
1618         goto out_destroy_ept;
1619     } else if (addr) {
1620         wcn36xx_info("mac address: %pM\n", addr);
1621         SET_IEEE80211_PERM_ADDR(wcn->hw, addr);
1622     }
1623 
1624     ret = wcn36xx_platform_get_resources(wcn, pdev);
1625     if (ret)
1626         goto out_destroy_ept;
1627 
1628     wcn36xx_init_ieee80211(wcn);
1629     ret = ieee80211_register_hw(wcn->hw);
1630     if (ret)
1631         goto out_unmap;
1632 
1633     return 0;
1634 
1635 out_unmap:
1636     iounmap(wcn->ccu_base);
1637     iounmap(wcn->dxe_base);
1638 out_destroy_ept:
1639     rpmsg_destroy_ept(wcn->smd_channel);
1640 out_wq:
1641     ieee80211_free_hw(hw);
1642 out_err:
1643     return ret;
1644 }
1645 
1646 static int wcn36xx_remove(struct platform_device *pdev)
1647 {
1648     struct ieee80211_hw *hw = platform_get_drvdata(pdev);
1649     struct wcn36xx *wcn = hw->priv;
1650     wcn36xx_dbg(WCN36XX_DBG_MAC, "platform remove\n");
1651 
1652     release_firmware(wcn->nv);
1653 
1654     ieee80211_unregister_hw(hw);
1655 
1656     qcom_smem_state_put(wcn->tx_enable_state);
1657     qcom_smem_state_put(wcn->tx_rings_empty_state);
1658 
1659     rpmsg_destroy_ept(wcn->smd_channel);
1660 
1661     iounmap(wcn->dxe_base);
1662     iounmap(wcn->ccu_base);
1663 
1664     __skb_queue_purge(&wcn->amsdu);
1665 
1666     mutex_destroy(&wcn->hal_mutex);
1667     ieee80211_free_hw(hw);
1668 
1669     return 0;
1670 }
1671 
1672 static const struct of_device_id wcn36xx_of_match[] = {
1673     { .compatible = "qcom,wcnss-wlan" },
1674     {}
1675 };
1676 MODULE_DEVICE_TABLE(of, wcn36xx_of_match);
1677 
1678 static struct platform_driver wcn36xx_driver = {
1679     .probe      = wcn36xx_probe,
1680     .remove     = wcn36xx_remove,
1681     .driver         = {
1682         .name   = "wcn36xx",
1683         .of_match_table = wcn36xx_of_match,
1684     },
1685 };
1686 
1687 module_platform_driver(wcn36xx_driver);
1688 
1689 MODULE_LICENSE("Dual BSD/GPL");
1690 MODULE_AUTHOR("Eugene Krasnikov k.eugene.e@gmail.com");
1691 MODULE_FIRMWARE(WLAN_NV_FILE);
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