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Date: Fri, 21 Jun 2024 15:51:50 +0800
From: David Lin <yu-hao.lin@....com>
To: linux-wireless@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
briannorris@...omium.org,
kvalo@...nel.org,
francesco@...cini.it,
tsung-hsien.hsieh@....com,
David Lin <yu-hao.lin@....com>
Subject: [PATCH 25/43] wifi: nxpwifi: add scan.c
Signed-off-by: David Lin <yu-hao.lin@....com>
---
drivers/net/wireless/nxp/nxpwifi/scan.c | 2894 +++++++++++++++++++++++
1 file changed, 2894 insertions(+)
create mode 100644 drivers/net/wireless/nxp/nxpwifi/scan.c
diff --git a/drivers/net/wireless/nxp/nxpwifi/scan.c b/drivers/net/wireless/nxp/nxpwifi/scan.c
new file mode 100644
index 000000000000..a41d561cfe57
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/scan.c
@@ -0,0 +1,2894 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: scan ioctl and command handling
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include "decl.h"
+#include "ioctl.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "cmdevt.h"
+#include "11n.h"
+#include "cfg80211.h"
+
+/* The maximum number of channels the firmware can scan per command */
+#define NXPWIFI_MAX_CHANNELS_PER_SPECIFIC_SCAN 14
+
+#define NXPWIFI_DEF_CHANNELS_PER_SCAN_CMD 4
+
+/* Memory needed to store a max sized Channel List TLV for a firmware scan */
+#define CHAN_TLV_MAX_SIZE (sizeof(struct nxpwifi_ie_types_header) \
+ + (NXPWIFI_MAX_CHANNELS_PER_SPECIFIC_SCAN \
+ * sizeof(struct nxpwifi_chan_scan_param_set)))
+
+/* Memory needed to store supported rate */
+#define RATE_TLV_MAX_SIZE (sizeof(struct nxpwifi_ie_types_rates_param_set) \
+ + HOSTCMD_SUPPORTED_RATES)
+
+/* Memory needed to store a max number/size WildCard SSID TLV for a firmware
+ * scan
+ */
+#define WILDCARD_SSID_TLV_MAX_SIZE \
+ (NXPWIFI_MAX_SSID_LIST_LENGTH * \
+ (sizeof(struct nxpwifi_ie_types_wildcard_ssid_params) \
+ + IEEE80211_MAX_SSID_LEN))
+
+/* Maximum memory needed for a nxpwifi_scan_cmd_config with all TLVs at max */
+#define MAX_SCAN_CFG_ALLOC (sizeof(struct nxpwifi_scan_cmd_config) \
+ + sizeof(struct nxpwifi_ie_types_num_probes) \
+ + sizeof(struct nxpwifi_ie_types_htcap) \
+ + CHAN_TLV_MAX_SIZE \
+ + RATE_TLV_MAX_SIZE \
+ + WILDCARD_SSID_TLV_MAX_SIZE)
+
+union nxpwifi_scan_cmd_config_tlv {
+ /* Scan configuration (variable length) */
+ struct nxpwifi_scan_cmd_config config;
+ /* Max allocated block */
+ u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
+};
+
+enum cipher_suite {
+ CIPHER_SUITE_TKIP,
+ CIPHER_SUITE_CCMP,
+ CIPHER_SUITE_MAX
+};
+
+static u8 nxpwifi_wpa_oui[CIPHER_SUITE_MAX][4] = {
+ { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */
+ { 0x00, 0x50, 0xf2, 0x04 }, /* AES */
+};
+
+static u8 nxpwifi_rsn_oui[CIPHER_SUITE_MAX][4] = {
+ { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */
+ { 0x00, 0x0f, 0xac, 0x04 }, /* AES */
+};
+
+static void
+_dbg_security_flags(int log_level, const char *func, const char *desc,
+ struct nxpwifi_private *priv,
+ struct nxpwifi_bssdescriptor *bss_desc)
+{
+ _nxpwifi_dbg(priv->adapter, log_level,
+ "info: %s: %s:\twpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\tEncMode=%#x privacy=%#x\n",
+ func, desc,
+ bss_desc->bcn_wpa_ie ?
+ bss_desc->bcn_wpa_ie->vend_hdr.element_id : 0,
+ bss_desc->bcn_rsn_ie ?
+ bss_desc->bcn_rsn_ie->ieee_hdr.element_id : 0,
+ priv->sec_info.wep_enabled ? "e" : "d",
+ priv->sec_info.wpa_enabled ? "e" : "d",
+ priv->sec_info.wpa2_enabled ? "e" : "d",
+ priv->sec_info.encryption_mode,
+ bss_desc->privacy);
+}
+
+#define dbg_security_flags(mask, desc, priv, bss_desc) \
+ _dbg_security_flags(NXPWIFI_DBG_##mask, desc, __func__, priv, bss_desc)
+
+static bool
+has_ieee_hdr(struct ieee_types_generic *ie, u8 key)
+{
+ return (ie && ie->ieee_hdr.element_id == key);
+}
+
+static bool
+has_vendor_hdr(struct ieee_types_vendor_specific *ie, u8 key)
+{
+ return (ie && ie->vend_hdr.element_id == key);
+}
+
+/* This function parses a given IE for a given OUI.
+ *
+ * This is used to parse a WPA/RSN IE to find if it has
+ * a given oui in PTK.
+ */
+static u8
+nxpwifi_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
+{
+ u8 count;
+
+ count = iebody->ptk_cnt[0];
+
+ /* There could be multiple OUIs for PTK hence
+ * 1) Take the length.
+ * 2) Check all the OUIs for AES.
+ * 3) If one of them is AES then pass success.
+ */
+ while (count) {
+ if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
+ return NXPWIFI_OUI_PRESENT;
+
+ --count;
+ if (count)
+ iebody = (struct ie_body *)((u8 *)iebody +
+ sizeof(iebody->ptk_body));
+ }
+
+ pr_debug("info: %s: OUI is not found in PTK\n", __func__);
+ return NXPWIFI_OUI_NOT_PRESENT;
+}
+
+/* This function checks if a given OUI is present in a RSN IE.
+ *
+ * The function first checks if a RSN IE is present or not in the
+ * BSS descriptor. It tries to locate the OUI only if such an IE is
+ * present.
+ */
+static u8
+nxpwifi_is_rsn_oui_present(struct nxpwifi_bssdescriptor *bss_desc, u32 cipher)
+{
+ u8 *oui;
+ struct ie_body *iebody;
+ u8 ret = NXPWIFI_OUI_NOT_PRESENT;
+
+ if (has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) {
+ iebody = (struct ie_body *)
+ (((u8 *)bss_desc->bcn_rsn_ie->data) +
+ RSN_GTK_OUI_OFFSET);
+ oui = &nxpwifi_rsn_oui[cipher][0];
+ ret = nxpwifi_search_oui_in_ie(iebody, oui);
+ if (ret)
+ return ret;
+ }
+ return ret;
+}
+
+/* This function checks if a given OUI is present in a WPA IE.
+ *
+ * The function first checks if a WPA IE is present or not in the
+ * BSS descriptor. It tries to locate the OUI only if such an IE is
+ * present.
+ */
+static u8
+nxpwifi_is_wpa_oui_present(struct nxpwifi_bssdescriptor *bss_desc, u32 cipher)
+{
+ u8 *oui;
+ struct ie_body *iebody;
+ u8 ret = NXPWIFI_OUI_NOT_PRESENT;
+
+ if (has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC)) {
+ iebody = (struct ie_body *)((u8 *)bss_desc->bcn_wpa_ie->data +
+ WPA_GTK_OUI_OFFSET);
+ oui = &nxpwifi_wpa_oui[cipher][0];
+ ret = nxpwifi_search_oui_in_ie(iebody, oui);
+ if (ret)
+ return ret;
+ }
+ return ret;
+}
+
+/* This function checks if driver is configured with no security mode and
+ * scanned network is compatible with it.
+ */
+static bool
+nxpwifi_is_bss_no_sec(struct nxpwifi_private *priv,
+ struct nxpwifi_bssdescriptor *bss_desc)
+{
+ if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
+ !priv->sec_info.wpa2_enabled &&
+ !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) &&
+ !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) &&
+ !priv->sec_info.encryption_mode && !bss_desc->privacy) {
+ return true;
+ }
+ return false;
+}
+
+/* This function checks if static WEP is enabled in driver and scanned network
+ * is compatible with it.
+ */
+static bool
+nxpwifi_is_bss_static_wep(struct nxpwifi_private *priv,
+ struct nxpwifi_bssdescriptor *bss_desc)
+{
+ if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
+ !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
+ return true;
+ }
+ return false;
+}
+
+/* This function checks if wpa is enabled in driver and scanned network is
+ * compatible with it.
+ */
+static bool
+nxpwifi_is_bss_wpa(struct nxpwifi_private *priv,
+ struct nxpwifi_bssdescriptor *bss_desc)
+{
+ if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
+ !priv->sec_info.wpa2_enabled &&
+ has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC)
+ /* Privacy bit may NOT be set in some APs like
+ * LinkSys WRT54G && bss_desc->privacy
+ */
+ ) {
+ dbg_security_flags(INFO, "WPA", priv, bss_desc);
+ return true;
+ }
+ return false;
+}
+
+/* This function checks if wpa2 is enabled in driver and scanned network is
+ * compatible with it.
+ */
+static bool
+nxpwifi_is_bss_wpa2(struct nxpwifi_private *priv,
+ struct nxpwifi_bssdescriptor *bss_desc)
+{
+ if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
+ priv->sec_info.wpa2_enabled &&
+ has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) {
+ /* Privacy bit may NOT be set in some APs like
+ * LinkSys WRT54G && bss_desc->privacy
+ */
+ dbg_security_flags(INFO, "WAP2", priv, bss_desc);
+ return true;
+ }
+ return false;
+}
+
+/* This function checks if dynamic WEP is enabled in driver and scanned network
+ * is compatible with it.
+ */
+static bool
+nxpwifi_is_bss_dynamic_wep(struct nxpwifi_private *priv,
+ struct nxpwifi_bssdescriptor *bss_desc)
+{
+ if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
+ !priv->sec_info.wpa2_enabled &&
+ !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) &&
+ !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) &&
+ priv->sec_info.encryption_mode && bss_desc->privacy) {
+ dbg_security_flags(INFO, "dynamic", priv, bss_desc);
+ return true;
+ }
+ return false;
+}
+
+/* This function checks if a scanned network is compatible with the driver
+ * settings.
+ *
+ * WEP WPA WPA2 encrypt Network
+ * -enabled -enabled -enabled mode Privacy WPA WPA2 Compatible
+ * 0 0 0 NONE 0 0 0 yes No security
+ * 0 1 0 x 1x 1 x yes WPA (disable
+ * HT if no AES)
+ * 0 0 1 x 1x x 1 yes WPA2 (disable
+ * HT if no AES)
+ * 1 0 0 NONE 1 0 0 yes Static WEP
+ * (disable HT)
+ * 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
+ *
+ * Compatibility is not matched while roaming, except for mode.
+ */
+static s32
+nxpwifi_is_network_compatible(struct nxpwifi_private *priv,
+ struct nxpwifi_bssdescriptor *bss_desc, u32 mode)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+
+ bss_desc->disable_11n = false;
+
+ /* Don't check for compatibility if roaming */
+ if (priv->media_connected &&
+ priv->bss_mode == NL80211_IFTYPE_STATION &&
+ bss_desc->bss_mode == NL80211_IFTYPE_STATION)
+ return 0;
+
+ if (priv->wps.session_enable) {
+ nxpwifi_dbg(adapter, IOCTL,
+ "info: return success directly in WPS period\n");
+ return 0;
+ }
+
+ if (bss_desc->chan_sw_ie_present) {
+ nxpwifi_dbg(adapter, INFO,
+ "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n");
+ return -1;
+ }
+
+ if (bss_desc->bss_mode == mode) {
+ if (nxpwifi_is_bss_no_sec(priv, bss_desc)) {
+ /* No security */
+ return 0;
+ } else if (nxpwifi_is_bss_static_wep(priv, bss_desc)) {
+ /* Static WEP enabled */
+ nxpwifi_dbg(adapter, INFO,
+ "info: Disable 11n in WEP mode.\n");
+ bss_desc->disable_11n = true;
+ return 0;
+ } else if (nxpwifi_is_bss_wpa(priv, bss_desc)) {
+ /* WPA enabled */
+ if (((priv->adapter->config_bands & BAND_GN ||
+ priv->adapter->config_bands & BAND_AN) &&
+ bss_desc->bcn_ht_cap) &&
+ !nxpwifi_is_wpa_oui_present(bss_desc,
+ CIPHER_SUITE_CCMP)) {
+ if (nxpwifi_is_wpa_oui_present
+ (bss_desc, CIPHER_SUITE_TKIP)) {
+ nxpwifi_dbg(adapter, INFO,
+ "info: Disable 11n if AES\t"
+ "is not supported by AP\n");
+ bss_desc->disable_11n = true;
+ } else {
+ return -1;
+ }
+ }
+ return 0;
+ } else if (nxpwifi_is_bss_wpa2(priv, bss_desc)) {
+ /* WPA2 enabled */
+ if (((priv->adapter->config_bands & BAND_GN ||
+ priv->adapter->config_bands & BAND_AN) &&
+ bss_desc->bcn_ht_cap) &&
+ !nxpwifi_is_rsn_oui_present(bss_desc,
+ CIPHER_SUITE_CCMP)) {
+ if (nxpwifi_is_rsn_oui_present
+ (bss_desc, CIPHER_SUITE_TKIP)) {
+ nxpwifi_dbg(adapter, INFO,
+ "info: Disable 11n if AES\t"
+ "is not supported by AP\n");
+ bss_desc->disable_11n = true;
+ } else {
+ return -1;
+ }
+ }
+ return 0;
+ } else if (nxpwifi_is_bss_dynamic_wep(priv, bss_desc)) {
+ /* Dynamic WEP enabled */
+ return 0;
+ }
+
+ /* Security doesn't match */
+ dbg_security_flags(ERROR, "failed", priv, bss_desc);
+ return -1;
+ }
+
+ /* Mode doesn't match */
+ return -1;
+}
+
+/* This function creates a channel list for the driver to scan, based
+ * on region/band information.
+ *
+ * This routine is used for any scan that is not provided with a
+ * specific channel list to scan.
+ */
+static int
+nxpwifi_scan_create_channel_list(struct nxpwifi_private *priv,
+ const struct nxpwifi_user_scan_cfg
+ *user_scan_in,
+ struct nxpwifi_chan_scan_param_set
+ *scan_chan_list,
+ u8 filtered_scan)
+{
+ enum nl80211_band band;
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_channel *ch;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ int chan_idx = 0, i;
+ u16 scan_time = 0;
+
+ if (user_scan_in)
+ scan_time = (u16)user_scan_in->chan_list[0].scan_time;
+
+ for (band = 0; (band < NUM_NL80211_BANDS) ; band++) {
+ if (!priv->wdev.wiphy->bands[band])
+ continue;
+
+ sband = priv->wdev.wiphy->bands[band];
+
+ for (i = 0; (i < sband->n_channels) ; i++) {
+ ch = &sband->channels[i];
+ if (ch->flags & IEEE80211_CHAN_DISABLED)
+ continue;
+ scan_chan_list[chan_idx].radio_type = band;
+
+ if (scan_time)
+ scan_chan_list[chan_idx].max_scan_time =
+ cpu_to_le16(scan_time);
+ else if ((ch->flags & IEEE80211_CHAN_NO_IR) ||
+ (ch->flags & IEEE80211_CHAN_RADAR))
+ scan_chan_list[chan_idx].max_scan_time =
+ cpu_to_le16(adapter->passive_scan_time);
+ else
+ scan_chan_list[chan_idx].max_scan_time =
+ cpu_to_le16(adapter->active_scan_time);
+
+ if (ch->flags & IEEE80211_CHAN_NO_IR)
+ scan_chan_list[chan_idx].chan_scan_mode_bmap |=
+ (NXPWIFI_PASSIVE_SCAN | NXPWIFI_HIDDEN_SSID_REPORT);
+ else
+ scan_chan_list[chan_idx].chan_scan_mode_bmap &=
+ ~NXPWIFI_PASSIVE_SCAN;
+
+ scan_chan_list[chan_idx].chan_number = (u32)ch->hw_value;
+ scan_chan_list[chan_idx].chan_scan_mode_bmap |=
+ NXPWIFI_DISABLE_CHAN_FILT;
+
+ if (filtered_scan &&
+ !((ch->flags & IEEE80211_CHAN_NO_IR) ||
+ (ch->flags & IEEE80211_CHAN_RADAR)))
+ scan_chan_list[chan_idx].max_scan_time =
+ cpu_to_le16(adapter->specific_scan_time);
+
+ chan_idx++;
+ }
+ }
+ return chan_idx;
+}
+
+/* This function creates a channel list tlv for bgscan config, based
+ * on region/band information.
+ */
+static int
+nxpwifi_bgscan_create_channel_list(struct nxpwifi_private *priv,
+ const struct nxpwifi_bg_scan_cfg
+ *bgscan_cfg_in,
+ struct nxpwifi_chan_scan_param_set
+ *scan_chan_list)
+{
+ enum nl80211_band band;
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_channel *ch;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ int chan_idx = 0, i;
+ u16 scan_time = 0, specific_scan_time = adapter->specific_scan_time;
+
+ if (bgscan_cfg_in)
+ scan_time = (u16)bgscan_cfg_in->chan_list[0].scan_time;
+
+ for (band = 0; (band < NUM_NL80211_BANDS); band++) {
+ if (!priv->wdev.wiphy->bands[band])
+ continue;
+
+ sband = priv->wdev.wiphy->bands[band];
+
+ for (i = 0; (i < sband->n_channels) ; i++) {
+ ch = &sband->channels[i];
+ if (ch->flags & IEEE80211_CHAN_DISABLED)
+ continue;
+ scan_chan_list[chan_idx].radio_type = band;
+
+ if (scan_time)
+ scan_chan_list[chan_idx].max_scan_time =
+ cpu_to_le16(scan_time);
+ else if (ch->flags & IEEE80211_CHAN_NO_IR)
+ scan_chan_list[chan_idx].max_scan_time =
+ cpu_to_le16(adapter->passive_scan_time);
+ else
+ scan_chan_list[chan_idx].max_scan_time =
+ cpu_to_le16(specific_scan_time);
+
+ if (ch->flags & IEEE80211_CHAN_NO_IR)
+ scan_chan_list[chan_idx].chan_scan_mode_bmap |=
+ NXPWIFI_PASSIVE_SCAN;
+ else
+ scan_chan_list[chan_idx].chan_scan_mode_bmap &=
+ ~NXPWIFI_PASSIVE_SCAN;
+
+ scan_chan_list[chan_idx].chan_number = (u32)ch->hw_value;
+ chan_idx++;
+ }
+ }
+ return chan_idx;
+}
+
+/* This function appends rate TLV to scan config command. */
+static int
+nxpwifi_append_rate_tlv(struct nxpwifi_private *priv,
+ struct nxpwifi_scan_cmd_config *scan_cfg_out,
+ u8 radio)
+{
+ struct nxpwifi_ie_types_rates_param_set *rates_tlv;
+ u8 rates[NXPWIFI_SUPPORTED_RATES], *tlv_pos;
+ u32 rates_size;
+
+ memset(rates, 0, sizeof(rates));
+
+ tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len;
+
+ if (priv->scan_request)
+ rates_size = nxpwifi_get_rates_from_cfg80211(priv, rates,
+ radio);
+ else
+ rates_size = nxpwifi_get_supported_rates(priv, rates);
+
+ nxpwifi_dbg(priv->adapter, CMD,
+ "info: SCAN_CMD: Rates size = %d\n",
+ rates_size);
+ rates_tlv = (struct nxpwifi_ie_types_rates_param_set *)tlv_pos;
+ rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
+ rates_tlv->header.len = cpu_to_le16((u16)rates_size);
+ memcpy(rates_tlv->rates, rates, rates_size);
+ scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size;
+
+ return rates_size;
+}
+
+/* This function constructs and sends multiple scan config commands to
+ * the firmware.
+ *
+ * Previous routines in the code flow have created a scan command configuration
+ * with any requested TLVs. This function splits the channel TLV into maximum
+ * channels supported per scan lists and sends the portion of the channel TLV,
+ * along with the other TLVs, to the firmware.
+ */
+static int
+nxpwifi_scan_channel_list(struct nxpwifi_private *priv,
+ u32 max_chan_per_scan, u8 filtered_scan,
+ struct nxpwifi_scan_cmd_config *scan_cfg_out,
+ struct nxpwifi_ie_types_chan_list_param_set *tlv_o,
+ struct nxpwifi_chan_scan_param_set *scan_chan_list)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ int ret = 0;
+ struct nxpwifi_chan_scan_param_set *tmp_chan_list;
+ u32 tlv_idx, rates_size, cmd_no;
+ u32 total_scan_time;
+ u32 done_early;
+ u8 radio_type;
+
+ if (!scan_cfg_out || !tlv_o || !scan_chan_list) {
+ nxpwifi_dbg(priv->adapter, ERROR,
+ "info: Scan: Null detect: %p, %p, %p\n",
+ scan_cfg_out, tlv_o, scan_chan_list);
+ return -1;
+ }
+
+ /* Check csa channel expiry before preparing scan list */
+ nxpwifi_11h_get_csa_closed_channel(priv);
+
+ tlv_o->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
+
+ /* Set the temp channel struct pointer to the start of the desired
+ * list
+ */
+ tmp_chan_list = scan_chan_list;
+
+ /* Loop through the desired channel list, sending a new firmware scan
+ * commands for each max_chan_per_scan channels (or for 1,6,11
+ * individually if configured accordingly)
+ */
+ while (tmp_chan_list->chan_number) {
+ tlv_idx = 0;
+ total_scan_time = 0;
+ radio_type = 0;
+ tlv_o->header.len = 0;
+ done_early = false;
+
+ /* Construct the Channel TLV for the scan command. Continue to
+ * insert channel TLVs until:
+ * - the tlv_idx hits the maximum configured per scan command
+ * - the next channel to insert is 0 (end of desired channel
+ * list)
+ * - done_early is set (controlling individual scanning of
+ * 1,6,11)
+ */
+ while (tlv_idx < max_chan_per_scan &&
+ tmp_chan_list->chan_number && !done_early) {
+ if (tmp_chan_list->chan_number == priv->csa_chan) {
+ tmp_chan_list++;
+ continue;
+ }
+
+ radio_type = tmp_chan_list->radio_type;
+ nxpwifi_dbg(priv->adapter, INFO,
+ "info: Scan: Chan(%3d), Radio(%d),\t"
+ "Mode(%d, %d), Dur(%d)\n",
+ tmp_chan_list->chan_number,
+ tmp_chan_list->radio_type,
+ tmp_chan_list->chan_scan_mode_bmap
+ & NXPWIFI_PASSIVE_SCAN,
+ (tmp_chan_list->chan_scan_mode_bmap
+ & NXPWIFI_DISABLE_CHAN_FILT) >> 1,
+ le16_to_cpu(tmp_chan_list->max_scan_time));
+
+ /* Copy the current channel TLV to the command being
+ * prepared
+ */
+ memcpy(&tlv_o->chan_scan_param[tlv_idx],
+ tmp_chan_list,
+ sizeof(*tlv_o->chan_scan_param));
+
+ /* Increment the TLV header length by the size
+ * appended
+ */
+ le16_unaligned_add_cpu(&tlv_o->header.len,
+ sizeof(*tlv_o->chan_scan_param));
+
+ /* The tlv buffer length is set to the number of bytes
+ * of the between the channel tlv pointer and the start
+ * of the tlv buffer. This compensates for any TLVs
+ * that were appended before the channel list.
+ */
+ scan_cfg_out->tlv_buf_len = (u32)((u8 *)tlv_o -
+ scan_cfg_out->tlv_buf);
+
+ /* Add the size of the channel tlv header and the data
+ * length
+ */
+ scan_cfg_out->tlv_buf_len +=
+ (sizeof(tlv_o->header)
+ + le16_to_cpu(tlv_o->header.len));
+
+ /* Increment the index to the channel tlv we are
+ * constructing
+ */
+ tlv_idx++;
+
+ /* Count the total scan time per command */
+ total_scan_time +=
+ le16_to_cpu(tmp_chan_list->max_scan_time);
+
+ done_early = false;
+
+ /* Stop the loop if the *current* channel is in the
+ * 1,6,11 set and we are not filtering on a BSSID
+ * or SSID.
+ */
+ if (!filtered_scan &&
+ (tmp_chan_list->chan_number == 1 ||
+ tmp_chan_list->chan_number == 6 ||
+ tmp_chan_list->chan_number == 11))
+ done_early = true;
+
+ /* Increment the tmp pointer to the next channel to
+ * be scanned
+ */
+ tmp_chan_list++;
+
+ /* Stop the loop if the *next* channel is in the 1,6,11
+ * set. This will cause it to be the only channel
+ * scanned on the next interation
+ */
+ if (!filtered_scan &&
+ (tmp_chan_list->chan_number == 1 ||
+ tmp_chan_list->chan_number == 6 ||
+ tmp_chan_list->chan_number == 11))
+ done_early = true;
+ }
+
+ /* The total scan time should be less than scan command timeout
+ * value
+ */
+ if (total_scan_time > NXPWIFI_MAX_TOTAL_SCAN_TIME) {
+ nxpwifi_dbg(priv->adapter, ERROR,
+ "total scan time %dms\t"
+ "is over limit (%dms), scan skipped\n",
+ total_scan_time,
+ NXPWIFI_MAX_TOTAL_SCAN_TIME);
+ ret = -1;
+ break;
+ }
+
+ rates_size = nxpwifi_append_rate_tlv(priv, scan_cfg_out,
+ radio_type);
+
+ /* Send the scan command to the firmware with the specified
+ * cfg
+ */
+ if (priv->adapter->ext_scan)
+ cmd_no = HOST_CMD_802_11_SCAN_EXT;
+ else
+ cmd_no = HOST_CMD_802_11_SCAN;
+
+ ret = nxpwifi_send_cmd(priv, cmd_no, HOST_ACT_GEN_SET,
+ 0, scan_cfg_out, false);
+
+ /* rate IE is updated per scan command but same starting
+ * pointer is used each time so that rate IE from earlier
+ * scan_cfg_out->buf is overwritten with new one.
+ */
+ scan_cfg_out->tlv_buf_len -=
+ sizeof(struct nxpwifi_ie_types_header) + rates_size;
+
+ if (ret) {
+ nxpwifi_cancel_pending_scan_cmd(adapter);
+ break;
+ }
+ }
+
+ if (ret)
+ return -1;
+
+ return 0;
+}
+
+/* This function constructs a scan command configuration structure to use
+ * in scan commands.
+ *
+ * Application layer or other functions can invoke network scanning
+ * with a scan configuration supplied in a user scan configuration structure.
+ * This structure is used as the basis of one or many scan command configuration
+ * commands that are sent to the command processing module and eventually to the
+ * firmware.
+ *
+ * This function creates a scan command configuration structure based on the
+ * following user supplied parameters (if present):
+ * - SSID filter
+ * - BSSID filter
+ * - Number of Probes to be sent
+ * - Channel list
+ *
+ * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
+ * If the number of probes is not set, adapter default setting is used.
+ */
+static void
+nxpwifi_config_scan(struct nxpwifi_private *priv,
+ const struct nxpwifi_user_scan_cfg *user_scan_in,
+ struct nxpwifi_scan_cmd_config *scan_cfg_out,
+ struct nxpwifi_ie_types_chan_list_param_set **chan_list_out,
+ struct nxpwifi_chan_scan_param_set *scan_chan_list,
+ u8 *max_chan_per_scan, u8 *filtered_scan,
+ u8 *scan_current_only)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct nxpwifi_ie_types_num_probes *num_probes_tlv;
+ struct nxpwifi_ie_types_scan_chan_gap *chan_gap_tlv;
+ struct nxpwifi_ie_types_random_mac *random_mac_tlv;
+ struct nxpwifi_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
+ struct nxpwifi_ie_types_bssid_list *bssid_tlv;
+ u8 *tlv_pos;
+ u32 num_probes;
+ u32 ssid_len;
+ u32 chan_idx;
+ u32 scan_time;
+ u32 scan_type;
+ u16 scan_dur;
+ u8 channel;
+ u8 radio_type;
+ int i;
+ u8 ssid_filter;
+ struct nxpwifi_ie_types_htcap *ht_cap;
+ struct nxpwifi_ie_types_bss_mode *bss_mode;
+
+ /* The tlv_buf_len is calculated for each scan command. The TLVs added
+ * in this routine will be preserved since the routine that sends the
+ * command will append channelTLVs at *chan_list_out. The difference
+ * between the *chan_list_out and the tlv_buf start will be used to
+ * calculate the size of anything we add in this routine.
+ */
+ scan_cfg_out->tlv_buf_len = 0;
+
+ /* Running tlv pointer. Assigned to chan_list_out at end of function
+ * so later routines know where channels can be added to the command
+ * buf
+ */
+ tlv_pos = scan_cfg_out->tlv_buf;
+
+ /* Initialize the scan as un-filtered; the flag is later set to TRUE
+ * below if a SSID or BSSID filter is sent in the command
+ */
+ *filtered_scan = false;
+
+ /* Initialize the scan as not being only on the current channel. If
+ * the channel list is customized, only contains one channel, and is
+ * the active channel, this is set true and data flow is not halted.
+ */
+ *scan_current_only = false;
+
+ if (user_scan_in) {
+ u8 tmpaddr[ETH_ALEN];
+
+ /* Default the ssid_filter flag to TRUE, set false under
+ * certain wildcard conditions and qualified by the existence
+ * of an SSID list before marking the scan as filtered
+ */
+ ssid_filter = true;
+
+ /* Set the BSS type scan filter, use Adapter setting if
+ * unset
+ */
+ scan_cfg_out->bss_mode =
+ (u8)(user_scan_in->bss_mode ?: adapter->scan_mode);
+
+ /* Set the number of probes to send, use Adapter setting
+ * if unset
+ */
+ num_probes = user_scan_in->num_probes ?: adapter->scan_probes;
+
+ /* Set the BSSID filter to the incoming configuration,
+ * if non-zero. If not set, it will remain disabled
+ * (all zeros).
+ */
+ memcpy(scan_cfg_out->specific_bssid,
+ user_scan_in->specific_bssid,
+ sizeof(scan_cfg_out->specific_bssid));
+
+ memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN);
+
+ if (adapter->ext_scan &&
+ !is_zero_ether_addr(tmpaddr)) {
+ bssid_tlv =
+ (struct nxpwifi_ie_types_bssid_list *)tlv_pos;
+ bssid_tlv->header.type = cpu_to_le16(TLV_TYPE_BSSID);
+ bssid_tlv->header.len = cpu_to_le16(ETH_ALEN);
+ memcpy(bssid_tlv->bssid, user_scan_in->specific_bssid,
+ ETH_ALEN);
+ tlv_pos += sizeof(struct nxpwifi_ie_types_bssid_list);
+ }
+
+ for (i = 0; i < user_scan_in->num_ssids; i++) {
+ ssid_len = user_scan_in->ssid_list[i].ssid_len;
+
+ wildcard_ssid_tlv =
+ (struct nxpwifi_ie_types_wildcard_ssid_params *)
+ tlv_pos;
+ wildcard_ssid_tlv->header.type =
+ cpu_to_le16(TLV_TYPE_WILDCARDSSID);
+ wildcard_ssid_tlv->header.len =
+ cpu_to_le16((u16)(ssid_len + sizeof(u8)));
+
+ /* max_ssid_length = 0 tells firmware to perform
+ * specific scan for the SSID filled, whereas
+ * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
+ * wildcard scan.
+ */
+ if (ssid_len)
+ wildcard_ssid_tlv->max_ssid_length = 0;
+ else
+ wildcard_ssid_tlv->max_ssid_length =
+ IEEE80211_MAX_SSID_LEN;
+
+ if (!memcmp(user_scan_in->ssid_list[i].ssid,
+ "DIRECT-", 7))
+ wildcard_ssid_tlv->max_ssid_length = 0xfe;
+
+ memcpy(wildcard_ssid_tlv->ssid,
+ user_scan_in->ssid_list[i].ssid, ssid_len);
+
+ tlv_pos += (sizeof(wildcard_ssid_tlv->header)
+ + le16_to_cpu(wildcard_ssid_tlv->header.len));
+
+ nxpwifi_dbg(adapter, INFO,
+ "info: scan: ssid[%d]: %s, %d\n",
+ i, wildcard_ssid_tlv->ssid,
+ wildcard_ssid_tlv->max_ssid_length);
+
+ /* Empty wildcard ssid with a maxlen will match many or
+ * potentially all SSIDs (maxlen == 32), therefore do
+ * not treat the scan as
+ * filtered.
+ */
+ if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
+ ssid_filter = false;
+ }
+
+ /* The default number of channels sent in the command is low to
+ * ensure the response buffer from the firmware does not
+ * truncate scan results. That is not an issue with an SSID
+ * or BSSID filter applied to the scan results in the firmware.
+ */
+ memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN);
+ if ((i && ssid_filter) ||
+ !is_zero_ether_addr(tmpaddr))
+ *filtered_scan = true;
+
+ if (user_scan_in->scan_chan_gap) {
+ nxpwifi_dbg(adapter, INFO,
+ "info: scan: channel gap = %d\n",
+ user_scan_in->scan_chan_gap);
+ *max_chan_per_scan =
+ NXPWIFI_MAX_CHANNELS_PER_SPECIFIC_SCAN;
+
+ chan_gap_tlv = (void *)tlv_pos;
+ chan_gap_tlv->header.type =
+ cpu_to_le16(TLV_TYPE_SCAN_CHANNEL_GAP);
+ chan_gap_tlv->header.len =
+ cpu_to_le16(sizeof(chan_gap_tlv->chan_gap));
+ chan_gap_tlv->chan_gap =
+ cpu_to_le16((user_scan_in->scan_chan_gap));
+ tlv_pos +=
+ sizeof(struct nxpwifi_ie_types_scan_chan_gap);
+ }
+
+ if (!is_zero_ether_addr(user_scan_in->random_mac)) {
+ random_mac_tlv = (void *)tlv_pos;
+ random_mac_tlv->header.type =
+ cpu_to_le16(TLV_TYPE_RANDOM_MAC);
+ random_mac_tlv->header.len =
+ cpu_to_le16(sizeof(random_mac_tlv->mac));
+ ether_addr_copy(random_mac_tlv->mac,
+ user_scan_in->random_mac);
+ tlv_pos +=
+ sizeof(struct nxpwifi_ie_types_random_mac);
+ }
+ } else {
+ scan_cfg_out->bss_mode = (u8)adapter->scan_mode;
+ num_probes = adapter->scan_probes;
+ }
+
+ /* If a specific BSSID or SSID is used, the number of channels in the
+ * scan command will be increased to the absolute maximum.
+ */
+ if (*filtered_scan) {
+ *max_chan_per_scan = NXPWIFI_MAX_CHANNELS_PER_SPECIFIC_SCAN;
+ } else {
+ if (!priv->media_connected)
+ *max_chan_per_scan = NXPWIFI_DEF_CHANNELS_PER_SCAN_CMD;
+ else
+ *max_chan_per_scan =
+ NXPWIFI_DEF_CHANNELS_PER_SCAN_CMD / 2;
+ }
+
+ if (adapter->ext_scan) {
+ bss_mode = (struct nxpwifi_ie_types_bss_mode *)tlv_pos;
+ bss_mode->header.type = cpu_to_le16(TLV_TYPE_BSS_MODE);
+ bss_mode->header.len = cpu_to_le16(sizeof(bss_mode->bss_mode));
+ bss_mode->bss_mode = scan_cfg_out->bss_mode;
+ tlv_pos += sizeof(bss_mode->header) +
+ le16_to_cpu(bss_mode->header.len);
+ }
+
+ /* If the input config or adapter has the number of Probes set,
+ * add tlv
+ */
+ if (num_probes) {
+ nxpwifi_dbg(adapter, INFO,
+ "info: scan: num_probes = %d\n",
+ num_probes);
+
+ num_probes_tlv = (struct nxpwifi_ie_types_num_probes *)tlv_pos;
+ num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
+ num_probes_tlv->header.len =
+ cpu_to_le16(sizeof(num_probes_tlv->num_probes));
+ num_probes_tlv->num_probes = cpu_to_le16((u16)num_probes);
+
+ tlv_pos += sizeof(num_probes_tlv->header) +
+ le16_to_cpu(num_probes_tlv->header.len);
+ }
+
+ if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
+ (priv->adapter->config_bands & BAND_GN ||
+ priv->adapter->config_bands & BAND_AN)) {
+ ht_cap = (struct nxpwifi_ie_types_htcap *)tlv_pos;
+ memset(ht_cap, 0, sizeof(struct nxpwifi_ie_types_htcap));
+ ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
+ ht_cap->header.len =
+ cpu_to_le16(sizeof(struct ieee80211_ht_cap));
+ radio_type =
+ nxpwifi_band_to_radio_type(priv->adapter->config_bands);
+ nxpwifi_fill_cap_info(priv, radio_type, &ht_cap->ht_cap);
+ tlv_pos += sizeof(struct nxpwifi_ie_types_htcap);
+ }
+
+ /* Append vendor specific IE TLV */
+ nxpwifi_cmd_append_vsie_tlv(priv, NXPWIFI_VSIE_MASK_SCAN, &tlv_pos);
+
+ /* Set the output for the channel TLV to the address in the tlv buffer
+ * past any TLVs that were added in this function (SSID, num_probes).
+ * Channel TLVs will be added past this for each scan command,
+ * preserving the TLVs that were previously added.
+ */
+ *chan_list_out =
+ (struct nxpwifi_ie_types_chan_list_param_set *)tlv_pos;
+
+ if (user_scan_in && user_scan_in->chan_list[0].chan_number) {
+ nxpwifi_dbg(adapter, INFO,
+ "info: Scan: Using supplied channel list\n");
+
+ for (chan_idx = 0;
+ chan_idx < NXPWIFI_USER_SCAN_CHAN_MAX &&
+ user_scan_in->chan_list[chan_idx].chan_number;
+ chan_idx++) {
+ channel = user_scan_in->chan_list[chan_idx].chan_number;
+ scan_chan_list[chan_idx].chan_number = channel;
+
+ radio_type =
+ user_scan_in->chan_list[chan_idx].radio_type;
+ scan_chan_list[chan_idx].radio_type = radio_type;
+
+ scan_type = user_scan_in->chan_list[chan_idx].scan_type;
+
+ if (scan_type == NXPWIFI_SCAN_TYPE_PASSIVE)
+ scan_chan_list[chan_idx].chan_scan_mode_bmap |=
+ (NXPWIFI_PASSIVE_SCAN |
+ NXPWIFI_HIDDEN_SSID_REPORT);
+ else
+ scan_chan_list[chan_idx].chan_scan_mode_bmap &=
+ ~NXPWIFI_PASSIVE_SCAN;
+
+ scan_chan_list[chan_idx].chan_scan_mode_bmap |=
+ NXPWIFI_DISABLE_CHAN_FILT;
+
+ scan_time = user_scan_in->chan_list[chan_idx].scan_time;
+
+ if (scan_time) {
+ scan_dur = (u16)scan_time;
+ } else {
+ if (scan_type == NXPWIFI_SCAN_TYPE_PASSIVE)
+ scan_dur = adapter->passive_scan_time;
+ else if (*filtered_scan)
+ scan_dur = adapter->specific_scan_time;
+ else
+ scan_dur = adapter->active_scan_time;
+ }
+
+ scan_chan_list[chan_idx].min_scan_time =
+ cpu_to_le16(scan_dur);
+ scan_chan_list[chan_idx].max_scan_time =
+ cpu_to_le16(scan_dur);
+ }
+
+ /* Check if we are only scanning the current channel */
+ if (chan_idx == 1 &&
+ user_scan_in->chan_list[0].chan_number ==
+ priv->curr_bss_params.bss_descriptor.channel) {
+ *scan_current_only = true;
+ nxpwifi_dbg(adapter, INFO,
+ "info: Scan: Scanning current channel only\n");
+ }
+ } else {
+ nxpwifi_dbg(adapter, INFO,
+ "info: Scan: Creating full region channel list\n");
+ nxpwifi_scan_create_channel_list(priv, user_scan_in,
+ scan_chan_list,
+ *filtered_scan);
+ }
+}
+
+/* This function inspects the scan response buffer for pointers to
+ * expected TLVs.
+ *
+ * TLVs can be included at the end of the scan response BSS information.
+ *
+ * Data in the buffer is parsed pointers to TLVs that can potentially
+ * be passed back in the response.
+ */
+static void
+nxpwifi_ret_802_11_scan_get_tlv_ptrs(struct nxpwifi_adapter *adapter,
+ struct nxpwifi_ie_types_data *tlv,
+ u32 tlv_buf_size, u32 req_tlv_type,
+ struct nxpwifi_ie_types_data **tlv_data)
+{
+ struct nxpwifi_ie_types_data *current_tlv;
+ u32 tlv_buf_left;
+ u32 tlv_type;
+ u32 tlv_len;
+
+ current_tlv = tlv;
+ tlv_buf_left = tlv_buf_size;
+ *tlv_data = NULL;
+
+ nxpwifi_dbg(adapter, INFO,
+ "info: SCAN_RESP: tlv_buf_size = %d\n",
+ tlv_buf_size);
+
+ while (tlv_buf_left >= sizeof(struct nxpwifi_ie_types_header)) {
+ tlv_type = le16_to_cpu(current_tlv->header.type);
+ tlv_len = le16_to_cpu(current_tlv->header.len);
+
+ if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
+ nxpwifi_dbg(adapter, ERROR,
+ "SCAN_RESP: TLV buffer corrupt\n");
+ break;
+ }
+
+ if (req_tlv_type == tlv_type) {
+ switch (tlv_type) {
+ case TLV_TYPE_TSFTIMESTAMP:
+ nxpwifi_dbg(adapter, INFO,
+ "info: SCAN_RESP: TSF\t"
+ "timestamp TLV, len = %d\n",
+ tlv_len);
+ *tlv_data = current_tlv;
+ break;
+ case TLV_TYPE_CHANNELBANDLIST:
+ nxpwifi_dbg(adapter, INFO,
+ "info: SCAN_RESP: channel\t"
+ "band list TLV, len = %d\n",
+ tlv_len);
+ *tlv_data = current_tlv;
+ break;
+ default:
+ nxpwifi_dbg(adapter, ERROR,
+ "SCAN_RESP: unhandled TLV = %d\n",
+ tlv_type);
+ /* Give up, this seems corrupted */
+ return;
+ }
+ }
+
+ if (*tlv_data)
+ break;
+
+ tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
+ current_tlv =
+ (struct nxpwifi_ie_types_data *)(current_tlv->data +
+ tlv_len);
+ } /* while */
+}
+
+/* This function parses provided beacon buffer and updates
+ * respective fields in bss descriptor structure.
+ */
+int nxpwifi_update_bss_desc_with_ie(struct nxpwifi_adapter *adapter,
+ struct nxpwifi_bssdescriptor *bss_entry)
+{
+ u8 element_id;
+ struct ieee_types_fh_param_set *fh_param_set;
+ struct ieee_types_ds_param_set *ds_param_set;
+ struct ieee_types_cf_param_set *cf_param_set;
+ struct ieee_types_ibss_param_set *ibss_param_set;
+ u8 *current_ptr;
+ u8 *rate;
+ u8 element_len;
+ u16 total_ie_len;
+ u8 bytes_to_copy;
+ u8 rate_size;
+ u8 found_data_rate_ie;
+ u32 bytes_left;
+ struct ieee_types_vendor_specific *vendor_ie;
+ const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
+ const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };
+
+ found_data_rate_ie = false;
+ rate_size = 0;
+ current_ptr = bss_entry->beacon_buf;
+ bytes_left = bss_entry->beacon_buf_size;
+
+ /* Process variable IE */
+ while (bytes_left >= 2) {
+ element_id = *current_ptr;
+ element_len = *(current_ptr + 1);
+ total_ie_len = element_len + sizeof(struct ieee_types_header);
+
+ if (bytes_left < total_ie_len) {
+ nxpwifi_dbg(adapter, ERROR,
+ "err: InterpretIE: in processing\t"
+ "IE, bytes left < IE length\n");
+ return -EINVAL;
+ }
+ switch (element_id) {
+ case WLAN_EID_SSID:
+ if (element_len > IEEE80211_MAX_SSID_LEN)
+ return -EINVAL;
+ bss_entry->ssid.ssid_len = element_len;
+ memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
+ element_len);
+ nxpwifi_dbg(adapter, INFO,
+ "info: InterpretIE: ssid: %-32s\n",
+ bss_entry->ssid.ssid);
+ break;
+
+ case WLAN_EID_SUPP_RATES:
+ if (element_len > NXPWIFI_SUPPORTED_RATES)
+ return -EINVAL;
+ memcpy(bss_entry->data_rates, current_ptr + 2,
+ element_len);
+ memcpy(bss_entry->supported_rates, current_ptr + 2,
+ element_len);
+ rate_size = element_len;
+ found_data_rate_ie = true;
+ break;
+
+ case WLAN_EID_FH_PARAMS:
+ if (total_ie_len < sizeof(*fh_param_set))
+ return -EINVAL;
+ fh_param_set =
+ (struct ieee_types_fh_param_set *)current_ptr;
+ memcpy(&bss_entry->phy_param_set.fh_param_set,
+ fh_param_set,
+ sizeof(struct ieee_types_fh_param_set));
+ break;
+
+ case WLAN_EID_DS_PARAMS:
+ if (total_ie_len < sizeof(*ds_param_set))
+ return -EINVAL;
+ ds_param_set =
+ (struct ieee_types_ds_param_set *)current_ptr;
+
+ bss_entry->channel = ds_param_set->current_chan;
+
+ memcpy(&bss_entry->phy_param_set.ds_param_set,
+ ds_param_set,
+ sizeof(struct ieee_types_ds_param_set));
+ break;
+
+ case WLAN_EID_CF_PARAMS:
+ if (total_ie_len < sizeof(*cf_param_set))
+ return -EINVAL;
+ cf_param_set =
+ (struct ieee_types_cf_param_set *)current_ptr;
+ memcpy(&bss_entry->ss_param_set.cf_param_set,
+ cf_param_set,
+ sizeof(struct ieee_types_cf_param_set));
+ break;
+
+ case WLAN_EID_IBSS_PARAMS:
+ if (total_ie_len < sizeof(*ibss_param_set))
+ return -EINVAL;
+ ibss_param_set =
+ (struct ieee_types_ibss_param_set *)
+ current_ptr;
+ memcpy(&bss_entry->ss_param_set.ibss_param_set,
+ ibss_param_set,
+ sizeof(struct ieee_types_ibss_param_set));
+ break;
+
+ case WLAN_EID_ERP_INFO:
+ if (!element_len)
+ return -EINVAL;
+ bss_entry->erp_flags = *(current_ptr + 2);
+ break;
+
+ case WLAN_EID_PWR_CONSTRAINT:
+ if (!element_len)
+ return -EINVAL;
+ bss_entry->local_constraint = *(current_ptr + 2);
+ bss_entry->sensed_11h = true;
+ break;
+
+ case WLAN_EID_CHANNEL_SWITCH:
+ bss_entry->chan_sw_ie_present = true;
+ fallthrough;
+ case WLAN_EID_PWR_CAPABILITY:
+ case WLAN_EID_TPC_REPORT:
+ case WLAN_EID_QUIET:
+ bss_entry->sensed_11h = true;
+ break;
+
+ case WLAN_EID_EXT_SUPP_RATES:
+ /* Only process extended supported rate
+ * if data rate is already found.
+ * Data rate IE should come before
+ * extended supported rate IE
+ */
+ if (found_data_rate_ie) {
+ if ((element_len + rate_size) >
+ NXPWIFI_SUPPORTED_RATES)
+ bytes_to_copy =
+ (NXPWIFI_SUPPORTED_RATES -
+ rate_size);
+ else
+ bytes_to_copy = element_len;
+
+ rate = (u8 *)bss_entry->data_rates;
+ rate += rate_size;
+ memcpy(rate, current_ptr + 2, bytes_to_copy);
+
+ rate = (u8 *)bss_entry->supported_rates;
+ rate += rate_size;
+ memcpy(rate, current_ptr + 2, bytes_to_copy);
+ }
+ break;
+
+ case WLAN_EID_VENDOR_SPECIFIC:
+ vendor_ie = (struct ieee_types_vendor_specific *)
+ current_ptr;
+
+ /* 802.11 requires at least 3-byte OUI. */
+ if (element_len < sizeof(vendor_ie->vend_hdr.oui.oui))
+ return -EINVAL;
+
+ /* Not long enough for a match? Skip it. */
+ if (element_len < sizeof(wpa_oui))
+ break;
+
+ if (!memcmp(&vendor_ie->vend_hdr.oui, wpa_oui,
+ sizeof(wpa_oui))) {
+ bss_entry->bcn_wpa_ie =
+ (struct ieee_types_vendor_specific *)
+ current_ptr;
+ bss_entry->wpa_offset = (u16)
+ (current_ptr - bss_entry->beacon_buf);
+ } else if (!memcmp(&vendor_ie->vend_hdr.oui, wmm_oui,
+ sizeof(wmm_oui))) {
+ if (total_ie_len ==
+ sizeof(struct ieee_types_wmm_parameter) ||
+ total_ie_len ==
+ sizeof(struct ieee_types_wmm_info))
+ /* Only accept and copy the WMM IE if
+ * it matches the size expected for the
+ * WMM Info IE or the WMM Parameter IE.
+ */
+ memcpy((u8 *)&bss_entry->wmm_ie,
+ current_ptr, total_ie_len);
+ }
+ break;
+ case WLAN_EID_RSN:
+ bss_entry->bcn_rsn_ie =
+ (struct ieee_types_generic *)current_ptr;
+ bss_entry->rsn_offset = (u16)(current_ptr -
+ bss_entry->beacon_buf);
+ break;
+ case WLAN_EID_RSNX:
+ bss_entry->bcn_rsnx_ie =
+ (struct ieee_types_generic *)current_ptr;
+ bss_entry->rsnx_offset =
+ (u16)(current_ptr - bss_entry->beacon_buf);
+ break;
+ case WLAN_EID_HT_CAPABILITY:
+ bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
+ (current_ptr +
+ sizeof(struct ieee_types_header));
+ bss_entry->ht_cap_offset = (u16)(current_ptr +
+ sizeof(struct ieee_types_header) -
+ bss_entry->beacon_buf);
+ break;
+ case WLAN_EID_HT_OPERATION:
+ bss_entry->bcn_ht_oper =
+ (struct ieee80211_ht_operation *)(current_ptr +
+ sizeof(struct ieee_types_header));
+ bss_entry->ht_info_offset = (u16)(current_ptr +
+ sizeof(struct ieee_types_header) -
+ bss_entry->beacon_buf);
+ break;
+ case WLAN_EID_VHT_CAPABILITY:
+ bss_entry->disable_11ac = false;
+ bss_entry->bcn_vht_cap =
+ (void *)(current_ptr +
+ sizeof(struct ieee_types_header));
+ bss_entry->vht_cap_offset =
+ (u16)((u8 *)bss_entry->bcn_vht_cap -
+ bss_entry->beacon_buf);
+ break;
+ case WLAN_EID_VHT_OPERATION:
+ bss_entry->bcn_vht_oper =
+ (void *)(current_ptr +
+ sizeof(struct ieee_types_header));
+ bss_entry->vht_info_offset =
+ (u16)((u8 *)bss_entry->bcn_vht_oper -
+ bss_entry->beacon_buf);
+ break;
+ case WLAN_EID_BSS_COEX_2040:
+ bss_entry->bcn_bss_co_2040 = current_ptr;
+ bss_entry->bss_co_2040_offset =
+ (u16)(current_ptr - bss_entry->beacon_buf);
+ break;
+ case WLAN_EID_EXT_CAPABILITY:
+ bss_entry->bcn_ext_cap = current_ptr;
+ bss_entry->ext_cap_offset =
+ (u16)(current_ptr - bss_entry->beacon_buf);
+ break;
+ case WLAN_EID_OPMODE_NOTIF:
+ bss_entry->oper_mode = (void *)current_ptr;
+ bss_entry->oper_mode_offset =
+ (u16)((u8 *)bss_entry->oper_mode -
+ bss_entry->beacon_buf);
+ break;
+ default:
+ break;
+ }
+
+ current_ptr += total_ie_len;
+ bytes_left -= total_ie_len;
+
+ } /* while (bytes_left > 2) */
+ return 0;
+}
+
+/* This function converts radio type scan parameter to a band configuration
+ * to be used in join command.
+ */
+static u8
+nxpwifi_radio_type_to_band(u8 radio_type)
+{
+ switch (radio_type) {
+ case HOST_SCAN_RADIO_TYPE_A:
+ return BAND_A;
+ case HOST_SCAN_RADIO_TYPE_BG:
+ default:
+ return BAND_G;
+ }
+}
+
+/* This is an internal function used to start a scan based on an input
+ * configuration.
+ *
+ * This uses the input user scan configuration information when provided in
+ * order to send the appropriate scan commands to firmware to populate or
+ * update the internal driver scan table.
+ */
+int nxpwifi_scan_networks(struct nxpwifi_private *priv,
+ const struct nxpwifi_user_scan_cfg *user_scan_in)
+{
+ int ret;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct cmd_ctrl_node *cmd_node;
+ union nxpwifi_scan_cmd_config_tlv *scan_cfg_out;
+ struct nxpwifi_ie_types_chan_list_param_set *chan_list_out;
+ struct nxpwifi_chan_scan_param_set *scan_chan_list;
+ u8 filtered_scan;
+ u8 scan_current_chan_only;
+ u8 max_chan_per_scan;
+
+ if (adapter->scan_processing) {
+ nxpwifi_dbg(adapter, WARN,
+ "cmd: Scan already in process...\n");
+ return -EBUSY;
+ }
+
+ if (priv->scan_block) {
+ nxpwifi_dbg(adapter, WARN,
+ "cmd: Scan is blocked during association...\n");
+ return -EBUSY;
+ }
+
+ if (test_bit(NXPWIFI_SURPRISE_REMOVED, &adapter->work_flags) ||
+ test_bit(NXPWIFI_IS_CMD_TIMEDOUT, &adapter->work_flags)) {
+ nxpwifi_dbg(adapter, ERROR,
+ "Ignore scan. Card removed or firmware in bad state\n");
+ return -EFAULT;
+ }
+
+ spin_lock_bh(&adapter->nxpwifi_cmd_lock);
+ adapter->scan_processing = true;
+ spin_unlock_bh(&adapter->nxpwifi_cmd_lock);
+
+ scan_cfg_out = kzalloc(sizeof(union nxpwifi_scan_cmd_config_tlv),
+ GFP_KERNEL);
+ if (!scan_cfg_out) {
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ scan_chan_list = kcalloc(NXPWIFI_USER_SCAN_CHAN_MAX,
+ sizeof(struct nxpwifi_chan_scan_param_set),
+ GFP_KERNEL);
+ if (!scan_chan_list) {
+ kfree(scan_cfg_out);
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ nxpwifi_config_scan(priv, user_scan_in, &scan_cfg_out->config,
+ &chan_list_out, scan_chan_list, &max_chan_per_scan,
+ &filtered_scan, &scan_current_chan_only);
+
+ ret = nxpwifi_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
+ &scan_cfg_out->config, chan_list_out,
+ scan_chan_list);
+
+ /* Get scan command from scan_pending_q and put to cmd_pending_q */
+ if (!ret) {
+ spin_lock_bh(&adapter->scan_pending_q_lock);
+ if (!list_empty(&adapter->scan_pending_q)) {
+ cmd_node = list_first_entry(&adapter->scan_pending_q,
+ struct cmd_ctrl_node, list);
+ list_del(&cmd_node->list);
+ spin_unlock_bh(&adapter->scan_pending_q_lock);
+ nxpwifi_insert_cmd_to_pending_q(adapter, cmd_node);
+ queue_work(adapter->workqueue, &adapter->main_work);
+
+ /* Perform internal scan synchronously */
+ if (!priv->scan_request) {
+ nxpwifi_dbg(adapter, INFO,
+ "wait internal scan\n");
+ nxpwifi_wait_queue_complete(adapter, cmd_node);
+ }
+ } else {
+ spin_unlock_bh(&adapter->scan_pending_q_lock);
+ }
+ }
+
+ kfree(scan_cfg_out);
+ kfree(scan_chan_list);
+done:
+ if (ret) {
+ spin_lock_bh(&adapter->nxpwifi_cmd_lock);
+ adapter->scan_processing = false;
+ spin_unlock_bh(&adapter->nxpwifi_cmd_lock);
+ }
+ return ret;
+}
+
+/* This function prepares a scan command to be sent to the firmware.
+ *
+ * This uses the scan command configuration sent to the command processing
+ * module in command preparation stage to configure a scan command structure
+ * to send to firmware.
+ *
+ * The fixed fields specifying the BSS type and BSSID filters as well as a
+ * variable number/length of TLVs are sent in the command to firmware.
+ *
+ * Preparation also includes -
+ * - Setting command ID, and proper size
+ * - Ensuring correct endian-ness
+ */
+int nxpwifi_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
+ struct nxpwifi_scan_cmd_config *scan_cfg)
+{
+ struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;
+
+ /* Set fixed field variables in scan command */
+ scan_cmd->bss_mode = scan_cfg->bss_mode;
+ memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
+ sizeof(scan_cmd->bssid));
+ memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
+
+ cmd->command = cpu_to_le16(HOST_CMD_802_11_SCAN);
+
+ /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
+ cmd->size = cpu_to_le16((u16)(sizeof(scan_cmd->bss_mode)
+ + sizeof(scan_cmd->bssid)
+ + scan_cfg->tlv_buf_len + S_DS_GEN));
+
+ return 0;
+}
+
+/* This function checks compatibility of requested network with current
+ * driver settings.
+ */
+int nxpwifi_check_network_compatibility(struct nxpwifi_private *priv,
+ struct nxpwifi_bssdescriptor *bss_desc)
+{
+ int ret = -1;
+
+ if (!bss_desc)
+ return -1;
+
+ if ((nxpwifi_get_cfp(priv, (u8)bss_desc->bss_band,
+ (u16)bss_desc->channel, 0))) {
+ switch (priv->bss_mode) {
+ case NL80211_IFTYPE_STATION:
+ ret = nxpwifi_is_network_compatible(priv, bss_desc,
+ priv->bss_mode);
+ if (ret)
+ nxpwifi_dbg(priv->adapter, ERROR,
+ "Incompatible network settings\n");
+ break;
+ default:
+ ret = 0;
+ }
+ }
+
+ return ret;
+}
+
+/* This function checks if SSID string contains all zeroes or length is zero */
+static bool nxpwifi_is_hidden_ssid(struct cfg80211_ssid *ssid)
+{
+ int idx;
+
+ for (idx = 0; idx < ssid->ssid_len; idx++) {
+ if (ssid->ssid[idx])
+ return false;
+ }
+
+ return true;
+}
+
+/* This function checks if any hidden SSID found in passive scan channels
+ * and save those channels for specific SSID active scan
+ */
+static int nxpwifi_save_hidden_ssid_channels(struct nxpwifi_private *priv,
+ struct cfg80211_bss *bss)
+{
+ struct nxpwifi_bssdescriptor *bss_desc;
+ int ret;
+ int chid;
+
+ /* Allocate and fill new bss descriptor */
+ bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL);
+ if (!bss_desc)
+ return -ENOMEM;
+
+ ret = nxpwifi_fill_new_bss_desc(priv, bss, bss_desc);
+ if (ret)
+ goto done;
+
+ if (nxpwifi_is_hidden_ssid(&bss_desc->ssid)) {
+ nxpwifi_dbg(priv->adapter, INFO, "found hidden SSID\n");
+ for (chid = 0 ; chid < NXPWIFI_USER_SCAN_CHAN_MAX; chid++) {
+ if (priv->hidden_chan[chid].chan_number ==
+ bss->channel->hw_value)
+ break;
+
+ if (!priv->hidden_chan[chid].chan_number) {
+ priv->hidden_chan[chid].chan_number =
+ bss->channel->hw_value;
+ priv->hidden_chan[chid].radio_type =
+ bss->channel->band;
+ priv->hidden_chan[chid].scan_type =
+ NXPWIFI_SCAN_TYPE_ACTIVE;
+ break;
+ }
+ }
+ }
+
+done:
+ /* beacon_ie buffer was allocated in function
+ * nxpwifi_fill_new_bss_desc(). Free it now.
+ */
+ kfree(bss_desc->beacon_buf);
+ kfree(bss_desc);
+ return 0;
+}
+
+static int nxpwifi_update_curr_bss_params(struct nxpwifi_private *priv,
+ struct cfg80211_bss *bss)
+{
+ struct nxpwifi_bssdescriptor *bss_desc;
+ int ret;
+
+ /* Allocate and fill new bss descriptor */
+ bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL);
+ if (!bss_desc)
+ return -ENOMEM;
+
+ ret = nxpwifi_fill_new_bss_desc(priv, bss, bss_desc);
+ if (ret)
+ goto done;
+
+ ret = nxpwifi_check_network_compatibility(priv, bss_desc);
+ if (ret)
+ goto done;
+
+ spin_lock_bh(&priv->curr_bcn_buf_lock);
+ /* Make a copy of current BSSID descriptor */
+ memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
+ sizeof(priv->curr_bss_params.bss_descriptor));
+
+ /* The contents of beacon_ie will be copied to its own buffer
+ * in nxpwifi_save_curr_bcn()
+ */
+ nxpwifi_save_curr_bcn(priv);
+ spin_unlock_bh(&priv->curr_bcn_buf_lock);
+
+done:
+ /* beacon_ie buffer was allocated in function
+ * nxpwifi_fill_new_bss_desc(). Free it now.
+ */
+ kfree(bss_desc->beacon_buf);
+ kfree(bss_desc);
+ return 0;
+}
+
+static int
+nxpwifi_parse_single_response_buf(struct nxpwifi_private *priv, u8 **bss_info,
+ u32 *bytes_left, u64 fw_tsf, u8 *radio_type,
+ bool ext_scan, s32 rssi_val)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct nxpwifi_chan_freq_power *cfp;
+ struct cfg80211_bss *bss;
+ u8 bssid[ETH_ALEN];
+ s32 rssi;
+ const u8 *ie_buf;
+ size_t ie_len;
+ u16 channel = 0;
+ u16 beacon_size = 0;
+ u32 curr_bcn_bytes;
+ u32 freq;
+ u16 beacon_period;
+ u16 cap_info_bitmap;
+ u8 *current_ptr;
+ u64 timestamp;
+ struct nxpwifi_fixed_bcn_param *bcn_param;
+ struct nxpwifi_bss_priv *bss_priv;
+
+ if (*bytes_left >= sizeof(beacon_size)) {
+ /* Extract & convert beacon size from command buffer */
+ beacon_size = get_unaligned_le16((*bss_info));
+ *bytes_left -= sizeof(beacon_size);
+ *bss_info += sizeof(beacon_size);
+ }
+
+ if (!beacon_size || beacon_size > *bytes_left) {
+ *bss_info += *bytes_left;
+ *bytes_left = 0;
+ return -EFAULT;
+ }
+
+ /* Initialize the current working beacon pointer for this BSS
+ * iteration
+ */
+ current_ptr = *bss_info;
+
+ /* Advance the return beacon pointer past the current beacon */
+ *bss_info += beacon_size;
+ *bytes_left -= beacon_size;
+
+ curr_bcn_bytes = beacon_size;
+
+ /* First 5 fields are bssid, RSSI(for legacy scan only),
+ * time stamp, beacon interval, and capability information
+ */
+ if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) +
+ sizeof(struct nxpwifi_fixed_bcn_param)) {
+ nxpwifi_dbg(adapter, ERROR,
+ "InterpretIE: not enough bytes left\n");
+ return -EFAULT;
+ }
+
+ memcpy(bssid, current_ptr, ETH_ALEN);
+ current_ptr += ETH_ALEN;
+ curr_bcn_bytes -= ETH_ALEN;
+
+ if (!ext_scan) {
+ rssi = (s32)*current_ptr;
+ rssi = (-rssi) * 100; /* Convert dBm to mBm */
+ current_ptr += sizeof(u8);
+ curr_bcn_bytes -= sizeof(u8);
+ nxpwifi_dbg(adapter, INFO,
+ "info: InterpretIE: RSSI=%d\n", rssi);
+ } else {
+ rssi = rssi_val;
+ }
+
+ bcn_param = (struct nxpwifi_fixed_bcn_param *)current_ptr;
+ current_ptr += sizeof(*bcn_param);
+ curr_bcn_bytes -= sizeof(*bcn_param);
+
+ timestamp = le64_to_cpu(bcn_param->timestamp);
+ beacon_period = le16_to_cpu(bcn_param->beacon_period);
+
+ cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
+ nxpwifi_dbg(adapter, INFO,
+ "info: InterpretIE: capabilities=0x%X\n",
+ cap_info_bitmap);
+
+ /* Rest of the current buffer are IE's */
+ ie_buf = current_ptr;
+ ie_len = curr_bcn_bytes;
+ nxpwifi_dbg(adapter, INFO,
+ "info: InterpretIE: IELength for this AP = %d\n",
+ curr_bcn_bytes);
+
+ while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
+ u8 element_id, element_len;
+
+ element_id = *current_ptr;
+ element_len = *(current_ptr + 1);
+ if (curr_bcn_bytes < element_len +
+ sizeof(struct ieee_types_header)) {
+ nxpwifi_dbg(adapter, ERROR,
+ "%s: bytes left < IE length\n", __func__);
+ return -EFAULT;
+ }
+ if (element_id == WLAN_EID_DS_PARAMS) {
+ channel = *(current_ptr +
+ sizeof(struct ieee_types_header));
+ break;
+ }
+
+ current_ptr += element_len + sizeof(struct ieee_types_header);
+ curr_bcn_bytes -= element_len +
+ sizeof(struct ieee_types_header);
+ }
+
+ if (channel) {
+ struct ieee80211_channel *chan;
+ struct nxpwifi_bssdescriptor *bss_desc;
+ u8 band;
+
+ /* Skip entry if on csa closed channel */
+ if (channel == priv->csa_chan) {
+ nxpwifi_dbg(adapter, WARN,
+ "Dropping entry on csa closed channel\n");
+ return 0;
+ }
+
+ band = BAND_G;
+ if (radio_type)
+ band = nxpwifi_radio_type_to_band(*radio_type &
+ (BIT(0) | BIT(1)));
+
+ cfp = nxpwifi_get_cfp(priv, band, channel, 0);
+
+ freq = cfp ? cfp->freq : 0;
+
+ chan = ieee80211_get_channel(priv->wdev.wiphy, freq);
+
+ if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
+ bss = cfg80211_inform_bss(priv->wdev.wiphy, chan,
+ CFG80211_BSS_FTYPE_UNKNOWN,
+ bssid, timestamp,
+ cap_info_bitmap,
+ beacon_period,
+ ie_buf, ie_len, rssi,
+ GFP_ATOMIC);
+ if (bss) {
+ bss_priv = (struct nxpwifi_bss_priv *)bss->priv;
+ bss_priv->band = band;
+ bss_priv->fw_tsf = fw_tsf;
+ bss_desc =
+ &priv->curr_bss_params.bss_descriptor;
+ if (priv->media_connected &&
+ !memcmp(bssid, bss_desc->mac_address,
+ ETH_ALEN))
+ nxpwifi_update_curr_bss_params(priv,
+ bss);
+
+ if ((chan->flags & IEEE80211_CHAN_RADAR) ||
+ (chan->flags & IEEE80211_CHAN_NO_IR)) {
+ nxpwifi_dbg(adapter, INFO,
+ "radar or passive channel %d\n",
+ channel);
+ nxpwifi_save_hidden_ssid_channels(priv,
+ bss);
+ }
+
+ cfg80211_put_bss(priv->wdev.wiphy, bss);
+ }
+ }
+ } else {
+ nxpwifi_dbg(adapter, WARN, "missing BSS channel IE\n");
+ }
+
+ return 0;
+}
+
+static void nxpwifi_complete_scan(struct nxpwifi_private *priv)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+
+ adapter->survey_idx = 0;
+ if (adapter->curr_cmd->wait_q_enabled) {
+ adapter->cmd_wait_q.status = 0;
+ if (!priv->scan_request) {
+ nxpwifi_dbg(adapter, INFO,
+ "complete internal scan\n");
+ nxpwifi_complete_cmd(adapter, adapter->curr_cmd);
+ }
+ }
+}
+
+/* This function checks if any hidden SSID found in passive scan channels
+ * and do specific SSID active scan for those channels
+ */
+static int
+nxpwifi_active_scan_req_for_passive_chan(struct nxpwifi_private *priv)
+{
+ int ret;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ u8 id = 0;
+ struct nxpwifi_user_scan_cfg *user_scan_cfg;
+
+ if (adapter->active_scan_triggered || !priv->scan_request ||
+ priv->scan_aborting) {
+ adapter->active_scan_triggered = false;
+ return 0;
+ }
+
+ if (!priv->hidden_chan[0].chan_number) {
+ nxpwifi_dbg(adapter, INFO, "No BSS with hidden SSID found on DFS channels\n");
+ return 0;
+ }
+ user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL);
+
+ if (!user_scan_cfg)
+ return -ENOMEM;
+
+ for (id = 0; id < NXPWIFI_USER_SCAN_CHAN_MAX; id++) {
+ if (!priv->hidden_chan[id].chan_number)
+ break;
+ memcpy(&user_scan_cfg->chan_list[id],
+ &priv->hidden_chan[id],
+ sizeof(struct nxpwifi_user_scan_chan));
+ }
+
+ adapter->active_scan_triggered = true;
+ if (priv->scan_request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
+ ether_addr_copy(user_scan_cfg->random_mac,
+ priv->scan_request->mac_addr);
+ user_scan_cfg->num_ssids = priv->scan_request->n_ssids;
+ user_scan_cfg->ssid_list = priv->scan_request->ssids;
+
+ ret = nxpwifi_scan_networks(priv, user_scan_cfg);
+ kfree(user_scan_cfg);
+
+ memset(&priv->hidden_chan, 0, sizeof(priv->hidden_chan));
+
+ if (ret) {
+ dev_err(priv->adapter->dev, "scan failed: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void nxpwifi_check_next_scan_command(struct nxpwifi_private *priv)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct cmd_ctrl_node *cmd_node;
+
+ spin_lock_bh(&adapter->scan_pending_q_lock);
+ if (list_empty(&adapter->scan_pending_q)) {
+ spin_unlock_bh(&adapter->scan_pending_q_lock);
+
+ spin_lock_bh(&adapter->nxpwifi_cmd_lock);
+ adapter->scan_processing = false;
+ spin_unlock_bh(&adapter->nxpwifi_cmd_lock);
+
+ nxpwifi_active_scan_req_for_passive_chan(priv);
+
+ if (!adapter->ext_scan)
+ nxpwifi_complete_scan(priv);
+
+ if (priv->scan_request) {
+ struct cfg80211_scan_info info = {
+ .aborted = false,
+ };
+
+ nxpwifi_dbg(adapter, INFO,
+ "info: notifying scan done\n");
+ cfg80211_scan_done(priv->scan_request, &info);
+ priv->scan_request = NULL;
+ priv->scan_aborting = false;
+ } else {
+ priv->scan_aborting = false;
+ nxpwifi_dbg(adapter, INFO,
+ "info: scan already aborted\n");
+ }
+ } else if ((priv->scan_aborting && !priv->scan_request) ||
+ priv->scan_block) {
+ spin_unlock_bh(&adapter->scan_pending_q_lock);
+
+ nxpwifi_cancel_pending_scan_cmd(adapter);
+
+ spin_lock_bh(&adapter->nxpwifi_cmd_lock);
+ adapter->scan_processing = false;
+ spin_unlock_bh(&adapter->nxpwifi_cmd_lock);
+
+ if (!adapter->active_scan_triggered) {
+ if (priv->scan_request) {
+ struct cfg80211_scan_info info = {
+ .aborted = true,
+ };
+
+ nxpwifi_dbg(adapter, INFO,
+ "info: aborting scan\n");
+ cfg80211_scan_done(priv->scan_request, &info);
+ priv->scan_request = NULL;
+ priv->scan_aborting = false;
+ } else {
+ priv->scan_aborting = false;
+ nxpwifi_dbg(adapter, INFO,
+ "info: scan already aborted\n");
+ }
+ }
+ } else {
+ /* Get scan command from scan_pending_q and put to
+ * cmd_pending_q
+ */
+ cmd_node = list_first_entry(&adapter->scan_pending_q,
+ struct cmd_ctrl_node, list);
+ list_del(&cmd_node->list);
+ spin_unlock_bh(&adapter->scan_pending_q_lock);
+ nxpwifi_insert_cmd_to_pending_q(adapter, cmd_node);
+ }
+}
+
+void nxpwifi_cancel_scan(struct nxpwifi_adapter *adapter)
+{
+ struct nxpwifi_private *priv;
+ int i;
+
+ nxpwifi_cancel_pending_scan_cmd(adapter);
+
+ if (adapter->scan_processing) {
+ spin_lock_bh(&adapter->nxpwifi_cmd_lock);
+ adapter->scan_processing = false;
+ spin_unlock_bh(&adapter->nxpwifi_cmd_lock);
+ for (i = 0; i < adapter->priv_num; i++) {
+ priv = adapter->priv[i];
+ if (!priv)
+ continue;
+ if (priv->scan_request) {
+ struct cfg80211_scan_info info = {
+ .aborted = true,
+ };
+
+ nxpwifi_dbg(adapter, INFO,
+ "info: aborting scan\n");
+ cfg80211_scan_done(priv->scan_request, &info);
+ priv->scan_request = NULL;
+ priv->scan_aborting = false;
+ }
+ }
+ }
+}
+
+/* This function handles the command response of scan.
+ *
+ * The response buffer for the scan command has the following
+ * memory layout:
+ *
+ * .-------------------------------------------------------------.
+ * | Header (4 * sizeof(t_u16)): Standard command response hdr |
+ * .-------------------------------------------------------------.
+ * | BufSize (t_u16) : sizeof the BSS Description data |
+ * .-------------------------------------------------------------.
+ * | NumOfSet (t_u8) : Number of BSS Descs returned |
+ * .-------------------------------------------------------------.
+ * | BSSDescription data (variable, size given in BufSize) |
+ * .-------------------------------------------------------------.
+ * | TLV data (variable, size calculated using Header->Size, |
+ * | BufSize and sizeof the fixed fields above) |
+ * .-------------------------------------------------------------.
+ */
+int nxpwifi_ret_802_11_scan(struct nxpwifi_private *priv,
+ struct host_cmd_ds_command *resp)
+{
+ int ret = 0;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
+ struct nxpwifi_ie_types_data *tlv_data;
+ struct nxpwifi_ie_types_tsf_timestamp *tsf_tlv;
+ u8 *bss_info;
+ u32 scan_resp_size;
+ u32 bytes_left;
+ u32 idx;
+ u32 tlv_buf_size;
+ struct nxpwifi_ie_types_chan_band_list_param_set *chan_band_tlv;
+ struct chan_band_param_set *chan_band;
+ u8 is_bgscan_resp;
+ __le64 fw_tsf = 0;
+ u8 *radio_type;
+ struct cfg80211_wowlan_nd_match *pmatch;
+ struct cfg80211_sched_scan_request *nd_config = NULL;
+
+ is_bgscan_resp = (le16_to_cpu(resp->command)
+ == HOST_CMD_802_11_BG_SCAN_QUERY);
+ if (is_bgscan_resp)
+ scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
+ else
+ scan_rsp = &resp->params.scan_resp;
+
+ if (scan_rsp->number_of_sets > NXPWIFI_MAX_AP) {
+ nxpwifi_dbg(adapter, ERROR,
+ "SCAN_RESP: too many AP returned (%d)\n",
+ scan_rsp->number_of_sets);
+ ret = -1;
+ goto check_next_scan;
+ }
+
+ /* Check csa channel expiry before parsing scan response */
+ nxpwifi_11h_get_csa_closed_channel(priv);
+
+ bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
+ nxpwifi_dbg(adapter, INFO,
+ "info: SCAN_RESP: bss_descript_size %d\n",
+ bytes_left);
+
+ scan_resp_size = le16_to_cpu(resp->size);
+
+ nxpwifi_dbg(adapter, INFO,
+ "info: SCAN_RESP: returned %d APs before parsing\n",
+ scan_rsp->number_of_sets);
+
+ bss_info = scan_rsp->bss_desc_and_tlv_buffer;
+
+ /* The size of the TLV buffer is equal to the entire command response
+ * size (scan_resp_size) minus the fixed fields (sizeof()'s), the
+ * BSS Descriptions (bss_descript_size as bytesLef) and the command
+ * response header (S_DS_GEN)
+ */
+ tlv_buf_size = scan_resp_size - (bytes_left
+ + sizeof(scan_rsp->bss_descript_size)
+ + sizeof(scan_rsp->number_of_sets)
+ + S_DS_GEN);
+
+ tlv_data = (struct nxpwifi_ie_types_data *)
+ (scan_rsp->bss_desc_and_tlv_buffer + bytes_left);
+
+ /* Search the TLV buffer space in the scan response for any valid
+ * TLVs
+ */
+ nxpwifi_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
+ TLV_TYPE_TSFTIMESTAMP,
+ (struct nxpwifi_ie_types_data **)
+ &tsf_tlv);
+
+ /* Search the TLV buffer space in the scan response for any valid
+ * TLVs
+ */
+ nxpwifi_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
+ TLV_TYPE_CHANNELBANDLIST,
+ (struct nxpwifi_ie_types_data **)
+ &chan_band_tlv);
+
+#ifdef CONFIG_PM
+ if (priv->wdev.wiphy->wowlan_config)
+ nd_config = priv->wdev.wiphy->wowlan_config->nd_config;
+#endif
+
+ if (nd_config) {
+ adapter->nd_info =
+ kzalloc(struct_size(adapter->nd_info, matches,
+ scan_rsp->number_of_sets),
+ GFP_ATOMIC);
+
+ if (adapter->nd_info)
+ adapter->nd_info->n_matches = scan_rsp->number_of_sets;
+ }
+
+ for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
+ /* If the TSF TLV was appended to the scan results, save this
+ * entry's TSF value in the fw_tsf field. It is the firmware's
+ * TSF value at the time the beacon or probe response was
+ * received.
+ */
+ if (tsf_tlv)
+ memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
+ sizeof(fw_tsf));
+
+ if (chan_band_tlv) {
+ chan_band = &chan_band_tlv->chan_band_param[idx];
+ radio_type = &chan_band->radio_type;
+ } else {
+ radio_type = NULL;
+ }
+
+ if (chan_band_tlv && adapter->nd_info) {
+ adapter->nd_info->matches[idx] =
+ kzalloc(sizeof(*pmatch) + sizeof(u32),
+ GFP_ATOMIC);
+
+ pmatch = adapter->nd_info->matches[idx];
+
+ if (pmatch) {
+ pmatch->n_channels = 1;
+ pmatch->channels[0] = chan_band->chan_number;
+ }
+ }
+
+ ret = nxpwifi_parse_single_response_buf(priv, &bss_info,
+ &bytes_left,
+ le64_to_cpu(fw_tsf),
+ radio_type, false, 0);
+ if (ret)
+ goto check_next_scan;
+ }
+
+check_next_scan:
+ nxpwifi_check_next_scan_command(priv);
+ return ret;
+}
+
+/* This function prepares an extended scan command to be sent to the firmware
+ *
+ * This uses the scan command configuration sent to the command processing
+ * module in command preparation stage to configure a extended scan command
+ * structure to send to firmware.
+ */
+int nxpwifi_cmd_802_11_scan_ext(struct nxpwifi_private *priv,
+ struct host_cmd_ds_command *cmd,
+ void *data_buf)
+{
+ struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan;
+ struct nxpwifi_scan_cmd_config *scan_cfg = data_buf;
+
+ memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);
+
+ cmd->command = cpu_to_le16(HOST_CMD_802_11_SCAN_EXT);
+
+ /* Size is equal to the sizeof(fixed portions) + the TLV len + header */
+ cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved)
+ + scan_cfg->tlv_buf_len + S_DS_GEN));
+
+ return 0;
+}
+
+/* This function prepares an background scan config command to be sent
+ * to the firmware
+ */
+int nxpwifi_cmd_802_11_bg_scan_config(struct nxpwifi_private *priv,
+ struct host_cmd_ds_command *cmd,
+ void *data_buf)
+{
+ struct host_cmd_ds_802_11_bg_scan_config *bgscan_config =
+ &cmd->params.bg_scan_config;
+ struct nxpwifi_bg_scan_cfg *bgscan_cfg_in = data_buf;
+ u8 *tlv_pos = bgscan_config->tlv;
+ u8 num_probes;
+ u32 ssid_len, chan_idx, scan_time, scan_type, scan_dur, chan_num;
+ int i;
+ struct nxpwifi_ie_types_num_probes *num_probes_tlv;
+ struct nxpwifi_ie_types_repeat_count *repeat_count_tlv;
+ struct nxpwifi_ie_types_min_rssi_threshold *rssi_threshold_tlv;
+ struct nxpwifi_ie_types_bgscan_start_later *start_later_tlv;
+ struct nxpwifi_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
+ struct nxpwifi_ie_types_chan_list_param_set *tlv_l;
+ struct nxpwifi_chan_scan_param_set *temp_chan;
+
+ cmd->command = cpu_to_le16(HOST_CMD_802_11_BG_SCAN_CONFIG);
+ cmd->size = cpu_to_le16(sizeof(*bgscan_config) + S_DS_GEN);
+
+ bgscan_config->action = cpu_to_le16(bgscan_cfg_in->action);
+ bgscan_config->enable = bgscan_cfg_in->enable;
+ bgscan_config->bss_type = bgscan_cfg_in->bss_type;
+ bgscan_config->scan_interval =
+ cpu_to_le32(bgscan_cfg_in->scan_interval);
+ bgscan_config->report_condition =
+ cpu_to_le32(bgscan_cfg_in->report_condition);
+
+ /* stop sched scan */
+ if (!bgscan_config->enable)
+ return 0;
+
+ bgscan_config->chan_per_scan = bgscan_cfg_in->chan_per_scan;
+
+ num_probes = (bgscan_cfg_in->num_probes ?
+ bgscan_cfg_in->num_probes : priv->adapter->scan_probes);
+
+ if (num_probes) {
+ num_probes_tlv = (struct nxpwifi_ie_types_num_probes *)tlv_pos;
+ num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
+ num_probes_tlv->header.len =
+ cpu_to_le16(sizeof(num_probes_tlv->num_probes));
+ num_probes_tlv->num_probes = cpu_to_le16((u16)num_probes);
+
+ tlv_pos += sizeof(num_probes_tlv->header) +
+ le16_to_cpu(num_probes_tlv->header.len);
+ }
+
+ if (bgscan_cfg_in->repeat_count) {
+ repeat_count_tlv =
+ (struct nxpwifi_ie_types_repeat_count *)tlv_pos;
+ repeat_count_tlv->header.type =
+ cpu_to_le16(TLV_TYPE_REPEAT_COUNT);
+ repeat_count_tlv->header.len =
+ cpu_to_le16(sizeof(repeat_count_tlv->repeat_count));
+ repeat_count_tlv->repeat_count =
+ cpu_to_le16(bgscan_cfg_in->repeat_count);
+
+ tlv_pos += sizeof(repeat_count_tlv->header) +
+ le16_to_cpu(repeat_count_tlv->header.len);
+ }
+
+ if (bgscan_cfg_in->rssi_threshold) {
+ rssi_threshold_tlv =
+ (struct nxpwifi_ie_types_min_rssi_threshold *)tlv_pos;
+ rssi_threshold_tlv->header.type =
+ cpu_to_le16(TLV_TYPE_RSSI_LOW);
+ rssi_threshold_tlv->header.len =
+ cpu_to_le16(sizeof(rssi_threshold_tlv->rssi_threshold));
+ rssi_threshold_tlv->rssi_threshold =
+ cpu_to_le16(bgscan_cfg_in->rssi_threshold);
+
+ tlv_pos += sizeof(rssi_threshold_tlv->header) +
+ le16_to_cpu(rssi_threshold_tlv->header.len);
+ }
+
+ for (i = 0; i < bgscan_cfg_in->num_ssids; i++) {
+ ssid_len = bgscan_cfg_in->ssid_list[i].ssid.ssid_len;
+
+ wildcard_ssid_tlv =
+ (struct nxpwifi_ie_types_wildcard_ssid_params *)tlv_pos;
+ wildcard_ssid_tlv->header.type =
+ cpu_to_le16(TLV_TYPE_WILDCARDSSID);
+ wildcard_ssid_tlv->header.len =
+ cpu_to_le16((u16)(ssid_len + sizeof(u8)));
+
+ /* max_ssid_length = 0 tells firmware to perform
+ * specific scan for the SSID filled, whereas
+ * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
+ * wildcard scan.
+ */
+ if (ssid_len)
+ wildcard_ssid_tlv->max_ssid_length = 0;
+ else
+ wildcard_ssid_tlv->max_ssid_length =
+ IEEE80211_MAX_SSID_LEN;
+
+ memcpy(wildcard_ssid_tlv->ssid,
+ bgscan_cfg_in->ssid_list[i].ssid.ssid, ssid_len);
+
+ tlv_pos += (sizeof(wildcard_ssid_tlv->header)
+ + le16_to_cpu(wildcard_ssid_tlv->header.len));
+ }
+
+ tlv_l = (struct nxpwifi_ie_types_chan_list_param_set *)tlv_pos;
+
+ if (bgscan_cfg_in->chan_list[0].chan_number) {
+ dev_dbg(priv->adapter->dev, "info: bgscan: Using supplied channel list\n");
+
+ tlv_l->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
+
+ for (chan_idx = 0;
+ chan_idx < NXPWIFI_BG_SCAN_CHAN_MAX &&
+ bgscan_cfg_in->chan_list[chan_idx].chan_number;
+ chan_idx++) {
+ temp_chan = &tlv_l->chan_scan_param[chan_idx];
+
+ /* Increment the TLV header length by size appended */
+ le16_unaligned_add_cpu(&tlv_l->header.len,
+ sizeof(*tlv_l->chan_scan_param));
+
+ temp_chan->chan_number =
+ bgscan_cfg_in->chan_list[chan_idx].chan_number;
+ temp_chan->radio_type =
+ bgscan_cfg_in->chan_list[chan_idx].radio_type;
+
+ scan_type =
+ bgscan_cfg_in->chan_list[chan_idx].scan_type;
+
+ if (scan_type == NXPWIFI_SCAN_TYPE_PASSIVE)
+ temp_chan->chan_scan_mode_bmap |=
+ NXPWIFI_PASSIVE_SCAN;
+ else
+ temp_chan->chan_scan_mode_bmap &=
+ ~NXPWIFI_PASSIVE_SCAN;
+
+ scan_time = bgscan_cfg_in->chan_list[chan_idx].scan_time;
+
+ if (scan_time) {
+ scan_dur = (u16)scan_time;
+ } else {
+ scan_dur = (scan_type ==
+ NXPWIFI_SCAN_TYPE_PASSIVE) ?
+ priv->adapter->passive_scan_time :
+ priv->adapter->specific_scan_time;
+ }
+
+ temp_chan->min_scan_time = cpu_to_le16(scan_dur);
+ temp_chan->max_scan_time = cpu_to_le16(scan_dur);
+ }
+ } else {
+ dev_dbg(priv->adapter->dev,
+ "info: bgscan: Creating full region channel list\n");
+ chan_num =
+ nxpwifi_bgscan_create_channel_list
+ (priv, bgscan_cfg_in,
+ tlv_l->chan_scan_param);
+ le16_unaligned_add_cpu(&tlv_l->header.len,
+ chan_num *
+ sizeof(*tlv_l->chan_scan_param));
+ }
+
+ tlv_pos += (sizeof(tlv_l->header)
+ + le16_to_cpu(tlv_l->header.len));
+
+ if (bgscan_cfg_in->start_later) {
+ start_later_tlv =
+ (struct nxpwifi_ie_types_bgscan_start_later *)tlv_pos;
+ start_later_tlv->header.type =
+ cpu_to_le16(TLV_TYPE_BGSCAN_START_LATER);
+ start_later_tlv->header.len =
+ cpu_to_le16(sizeof(start_later_tlv->start_later));
+ start_later_tlv->start_later =
+ cpu_to_le16(bgscan_cfg_in->start_later);
+
+ tlv_pos += sizeof(start_later_tlv->header) +
+ le16_to_cpu(start_later_tlv->header.len);
+ }
+
+ /* Append vendor specific IE TLV */
+ nxpwifi_cmd_append_vsie_tlv(priv, NXPWIFI_VSIE_MASK_BGSCAN, &tlv_pos);
+
+ le16_unaligned_add_cpu(&cmd->size, tlv_pos - bgscan_config->tlv);
+
+ return 0;
+}
+
+int nxpwifi_stop_bg_scan(struct nxpwifi_private *priv)
+{
+ struct nxpwifi_bg_scan_cfg *bgscan_cfg;
+
+ if (!priv->sched_scanning) {
+ dev_dbg(priv->adapter->dev, "bgscan already stopped!\n");
+ return 0;
+ }
+
+ bgscan_cfg = kzalloc(sizeof(*bgscan_cfg), GFP_KERNEL);
+ if (!bgscan_cfg)
+ return -ENOMEM;
+
+ bgscan_cfg->bss_type = NXPWIFI_BSS_MODE_INFRA;
+ bgscan_cfg->action = NXPWIFI_BGSCAN_ACT_SET;
+ bgscan_cfg->enable = false;
+
+ if (nxpwifi_send_cmd(priv, HOST_CMD_802_11_BG_SCAN_CONFIG,
+ HOST_ACT_GEN_SET, 0, bgscan_cfg, true)) {
+ kfree(bgscan_cfg);
+ return -EFAULT;
+ }
+
+ kfree(bgscan_cfg);
+ priv->sched_scanning = false;
+
+ return 0;
+}
+
+static void
+nxpwifi_update_chan_statistics(struct nxpwifi_private *priv,
+ struct nxpwifi_ietypes_chanstats *tlv_stat)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ u8 i, num_chan;
+ struct nxpwifi_fw_chan_stats *fw_chan_stats;
+ struct nxpwifi_chan_stats chan_stats;
+
+ fw_chan_stats = (void *)((u8 *)tlv_stat +
+ sizeof(struct nxpwifi_ie_types_header));
+ num_chan = le16_to_cpu(tlv_stat->header.len) /
+ sizeof(struct nxpwifi_chan_stats);
+
+ for (i = 0 ; i < num_chan; i++) {
+ if (adapter->survey_idx >= adapter->num_in_chan_stats) {
+ nxpwifi_dbg(adapter, WARN,
+ "FW reported too many channel results (max %d)\n",
+ adapter->num_in_chan_stats);
+ return;
+ }
+ chan_stats.chan_num = fw_chan_stats->chan_num;
+ chan_stats.bandcfg = fw_chan_stats->bandcfg;
+ chan_stats.flags = fw_chan_stats->flags;
+ chan_stats.noise = fw_chan_stats->noise;
+ chan_stats.total_bss = le16_to_cpu(fw_chan_stats->total_bss);
+ chan_stats.cca_scan_dur =
+ le16_to_cpu(fw_chan_stats->cca_scan_dur);
+ chan_stats.cca_busy_dur =
+ le16_to_cpu(fw_chan_stats->cca_busy_dur);
+ nxpwifi_dbg(adapter, INFO,
+ "chan=%d, noise=%d, total_network=%d scan_duration=%d, busy_duration=%d\n",
+ chan_stats.chan_num,
+ chan_stats.noise,
+ chan_stats.total_bss,
+ chan_stats.cca_scan_dur,
+ chan_stats.cca_busy_dur);
+ memcpy(&adapter->chan_stats[adapter->survey_idx++], &chan_stats,
+ sizeof(struct nxpwifi_chan_stats));
+ fw_chan_stats++;
+ }
+}
+
+/* This function handles the command response of extended scan */
+int nxpwifi_ret_802_11_scan_ext(struct nxpwifi_private *priv,
+ struct host_cmd_ds_command *resp)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct host_cmd_ds_802_11_scan_ext *ext_scan_resp;
+ struct nxpwifi_ie_types_header *tlv;
+ struct nxpwifi_ietypes_chanstats *tlv_stat;
+ u16 buf_left, type, len;
+
+ struct host_cmd_ds_command *cmd_ptr;
+ struct cmd_ctrl_node *cmd_node;
+ bool complete_scan = false;
+
+ nxpwifi_dbg(adapter, INFO, "info: EXT scan returns successfully\n");
+
+ ext_scan_resp = &resp->params.ext_scan;
+
+ tlv = (void *)ext_scan_resp->tlv_buffer;
+ buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN
+ - 1);
+
+ while (buf_left >= sizeof(struct nxpwifi_ie_types_header)) {
+ type = le16_to_cpu(tlv->type);
+ len = le16_to_cpu(tlv->len);
+
+ if (buf_left < (sizeof(struct nxpwifi_ie_types_header) + len)) {
+ nxpwifi_dbg(adapter, ERROR,
+ "error processing scan response TLVs");
+ break;
+ }
+
+ switch (type) {
+ case TLV_TYPE_CHANNEL_STATS:
+ tlv_stat = (void *)tlv;
+ nxpwifi_update_chan_statistics(priv, tlv_stat);
+ break;
+ default:
+ break;
+ }
+
+ buf_left -= len + sizeof(struct nxpwifi_ie_types_header);
+ tlv = (void *)((u8 *)tlv + len +
+ sizeof(struct nxpwifi_ie_types_header));
+ }
+
+ spin_lock_bh(&adapter->cmd_pending_q_lock);
+ spin_lock_bh(&adapter->scan_pending_q_lock);
+ if (list_empty(&adapter->scan_pending_q)) {
+ complete_scan = true;
+ list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) {
+ cmd_ptr = (void *)cmd_node->cmd_skb->data;
+ if (le16_to_cpu(cmd_ptr->command) ==
+ HOST_CMD_802_11_SCAN_EXT) {
+ nxpwifi_dbg(adapter, INFO,
+ "Scan pending in command pending list");
+ complete_scan = false;
+ break;
+ }
+ }
+ }
+ spin_unlock_bh(&adapter->scan_pending_q_lock);
+ spin_unlock_bh(&adapter->cmd_pending_q_lock);
+
+ if (complete_scan)
+ nxpwifi_complete_scan(priv);
+
+ return 0;
+}
+
+/* This function This function handles the event extended scan report. It
+ * parses extended scan results and informs to cfg80211 stack.
+ */
+int nxpwifi_handle_event_ext_scan_report(struct nxpwifi_private *priv,
+ void *buf)
+{
+ int ret = 0;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ u8 *bss_info;
+ u32 bytes_left, bytes_left_for_tlv, idx;
+ u16 type, len;
+ struct nxpwifi_ie_types_data *tlv;
+ struct nxpwifi_ie_types_bss_scan_rsp *scan_rsp_tlv;
+ struct nxpwifi_ie_types_bss_scan_info *scan_info_tlv;
+ u8 *radio_type;
+ u64 fw_tsf = 0;
+ s32 rssi = 0;
+ struct nxpwifi_event_scan_result *event_scan = buf;
+ u8 num_of_set = event_scan->num_of_set;
+ u8 *scan_resp = buf + sizeof(struct nxpwifi_event_scan_result);
+ u16 scan_resp_size = le16_to_cpu(event_scan->buf_size);
+
+ if (num_of_set > NXPWIFI_MAX_AP) {
+ nxpwifi_dbg(adapter, ERROR,
+ "EXT_SCAN: Invalid number of AP returned (%d)!!\n",
+ num_of_set);
+ ret = -1;
+ goto check_next_scan;
+ }
+
+ bytes_left = scan_resp_size;
+ nxpwifi_dbg(adapter, INFO,
+ "EXT_SCAN: size %d, returned %d APs...",
+ scan_resp_size, num_of_set);
+ nxpwifi_dbg_dump(adapter, CMD_D, "EXT_SCAN buffer:", buf,
+ scan_resp_size +
+ sizeof(struct nxpwifi_event_scan_result));
+
+ tlv = (struct nxpwifi_ie_types_data *)scan_resp;
+
+ for (idx = 0; idx < num_of_set && bytes_left; idx++) {
+ type = le16_to_cpu(tlv->header.type);
+ len = le16_to_cpu(tlv->header.len);
+ if (bytes_left < sizeof(struct nxpwifi_ie_types_header) + len) {
+ nxpwifi_dbg(adapter, ERROR,
+ "EXT_SCAN: Error bytes left < TLV length\n");
+ break;
+ }
+ scan_rsp_tlv = NULL;
+ scan_info_tlv = NULL;
+ bytes_left_for_tlv = bytes_left;
+
+ /* BSS response TLV with beacon or probe response buffer
+ * at the initial position of each descriptor
+ */
+ if (type != TLV_TYPE_BSS_SCAN_RSP)
+ break;
+
+ bss_info = (u8 *)tlv;
+ scan_rsp_tlv = (struct nxpwifi_ie_types_bss_scan_rsp *)tlv;
+ tlv = (struct nxpwifi_ie_types_data *)(tlv->data + len);
+ bytes_left_for_tlv -=
+ (len + sizeof(struct nxpwifi_ie_types_header));
+
+ while (bytes_left_for_tlv >=
+ sizeof(struct nxpwifi_ie_types_header) &&
+ le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) {
+ type = le16_to_cpu(tlv->header.type);
+ len = le16_to_cpu(tlv->header.len);
+ if (bytes_left_for_tlv <
+ sizeof(struct nxpwifi_ie_types_header) + len) {
+ nxpwifi_dbg(adapter, ERROR,
+ "EXT_SCAN: Error in processing TLV,\t"
+ "bytes left < TLV length\n");
+ scan_rsp_tlv = NULL;
+ bytes_left_for_tlv = 0;
+ continue;
+ }
+ switch (type) {
+ case TLV_TYPE_BSS_SCAN_INFO:
+ scan_info_tlv =
+ (struct nxpwifi_ie_types_bss_scan_info *)tlv;
+ if (len !=
+ sizeof(struct nxpwifi_ie_types_bss_scan_info) -
+ sizeof(struct nxpwifi_ie_types_header)) {
+ bytes_left_for_tlv = 0;
+ continue;
+ }
+ break;
+ default:
+ break;
+ }
+ tlv = (struct nxpwifi_ie_types_data *)(tlv->data + len);
+ bytes_left -=
+ (len + sizeof(struct nxpwifi_ie_types_header));
+ bytes_left_for_tlv -=
+ (len + sizeof(struct nxpwifi_ie_types_header));
+ }
+
+ if (!scan_rsp_tlv)
+ break;
+
+ /* Advance pointer to the beacon buffer length and
+ * update the bytes count so that the function
+ * wlan_interpret_bss_desc_with_ie() can handle the
+ * scan buffer withut any change
+ */
+ bss_info += sizeof(u16);
+ bytes_left -= sizeof(u16);
+
+ if (scan_info_tlv) {
+ rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi));
+ rssi *= 100; /* Convert dBm to mBm */
+ nxpwifi_dbg(adapter, INFO,
+ "info: InterpretIE: RSSI=%d\n", rssi);
+ fw_tsf = le64_to_cpu(scan_info_tlv->tsf);
+ radio_type = &scan_info_tlv->radio_type;
+ } else {
+ radio_type = NULL;
+ }
+ ret = nxpwifi_parse_single_response_buf(priv, &bss_info,
+ &bytes_left, fw_tsf,
+ radio_type, true, rssi);
+ if (ret)
+ goto check_next_scan;
+ }
+
+check_next_scan:
+ if (!event_scan->more_event)
+ nxpwifi_check_next_scan_command(priv);
+
+ return ret;
+}
+
+/* This function prepares command for background scan query.
+ *
+ * Preparation includes -
+ * - Setting command ID and proper size
+ * - Setting background scan flush parameter
+ * - Ensuring correct endian-ness
+ */
+int nxpwifi_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
+{
+ struct host_cmd_ds_802_11_bg_scan_query *bg_query =
+ &cmd->params.bg_scan_query;
+
+ cmd->command = cpu_to_le16(HOST_CMD_802_11_BG_SCAN_QUERY);
+ cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
+ + S_DS_GEN);
+
+ bg_query->flush = 1;
+
+ return 0;
+}
+
+/* This function inserts scan command node to the scan pending queue.
+ */
+void
+nxpwifi_queue_scan_cmd(struct nxpwifi_private *priv,
+ struct cmd_ctrl_node *cmd_node)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+
+ cmd_node->wait_q_enabled = true;
+ cmd_node->condition = &adapter->scan_wait_q_woken;
+ spin_lock_bh(&adapter->scan_pending_q_lock);
+ list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
+ spin_unlock_bh(&adapter->scan_pending_q_lock);
+}
+
+/* This function sends a scan command for all available channels to the
+ * firmware, filtered on a specific SSID.
+ */
+static int nxpwifi_scan_specific_ssid(struct nxpwifi_private *priv,
+ struct cfg80211_ssid *req_ssid)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ int ret;
+ struct nxpwifi_user_scan_cfg *scan_cfg;
+
+ if (adapter->scan_processing) {
+ nxpwifi_dbg(adapter, WARN,
+ "cmd: Scan already in process...\n");
+ return -EBUSY;
+ }
+
+ if (priv->scan_block) {
+ nxpwifi_dbg(adapter, WARN,
+ "cmd: Scan is blocked during association...\n");
+ return -EBUSY;
+ }
+
+ scan_cfg = kzalloc(sizeof(*scan_cfg), GFP_KERNEL);
+ if (!scan_cfg)
+ return -ENOMEM;
+
+ scan_cfg->ssid_list = req_ssid;
+ scan_cfg->num_ssids = 1;
+
+ ret = nxpwifi_scan_networks(priv, scan_cfg);
+
+ kfree(scan_cfg);
+ return ret;
+}
+
+/* Sends IOCTL request to start a scan.
+ *
+ * This function allocates the IOCTL request buffer, fills it
+ * with requisite parameters and calls the IOCTL handler.
+ *
+ * Scan command can be issued for both normal scan and specific SSID
+ * scan, depending upon whether an SSID is provided or not.
+ */
+int nxpwifi_request_scan(struct nxpwifi_private *priv,
+ struct cfg80211_ssid *req_ssid)
+{
+ int ret;
+
+ if (mutex_lock_interruptible(&priv->async_mutex)) {
+ nxpwifi_dbg(priv->adapter, ERROR,
+ "%s: acquire semaphore fail\n",
+ __func__);
+ return -1;
+ }
+
+ priv->adapter->scan_wait_q_woken = false;
+
+ if (req_ssid && req_ssid->ssid_len != 0)
+ /* Specific SSID scan */
+ ret = nxpwifi_scan_specific_ssid(priv, req_ssid);
+ else
+ /* Normal scan */
+ ret = nxpwifi_scan_networks(priv, NULL);
+
+ mutex_unlock(&priv->async_mutex);
+
+ return ret;
+}
+
+/* This function appends the vendor specific IE TLV to a buffer.
+ */
+int
+nxpwifi_cmd_append_vsie_tlv(struct nxpwifi_private *priv,
+ u16 vsie_mask, u8 **buffer)
+{
+ int id, ret_len = 0;
+ struct nxpwifi_ie_types_vendor_param_set *vs_param_set;
+
+ if (!buffer)
+ return 0;
+ if (!(*buffer))
+ return 0;
+
+ /* Traverse through the saved vendor specific IE array and append
+ * the selected(scan/assoc) IE as TLV to the command
+ */
+ for (id = 0; id < NXPWIFI_MAX_VSIE_NUM; id++) {
+ if (priv->vs_ie[id].mask & vsie_mask) {
+ vs_param_set =
+ (struct nxpwifi_ie_types_vendor_param_set *)
+ *buffer;
+ vs_param_set->header.type =
+ cpu_to_le16(TLV_TYPE_PASSTHROUGH);
+ vs_param_set->header.len =
+ cpu_to_le16((((u16)priv->vs_ie[id].ie[1])
+ & 0x00FF) + 2);
+ if (le16_to_cpu(vs_param_set->header.len) >
+ NXPWIFI_MAX_VSIE_LEN) {
+ nxpwifi_dbg(priv->adapter, ERROR,
+ "Invalid param length!\n");
+ break;
+ }
+
+ memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
+ le16_to_cpu(vs_param_set->header.len));
+ *buffer += le16_to_cpu(vs_param_set->header.len) +
+ sizeof(struct nxpwifi_ie_types_header);
+ ret_len += le16_to_cpu(vs_param_set->header.len) +
+ sizeof(struct nxpwifi_ie_types_header);
+ }
+ }
+ return ret_len;
+}
+
+/* This function saves a beacon buffer of the current BSS descriptor.
+ *
+ * The current beacon buffer is saved so that it can be restored in the
+ * following cases that makes the beacon buffer not to contain the current
+ * ssid's beacon buffer.
+ * - The current ssid was not found somehow in the last scan.
+ * - The current ssid was the last entry of the scan table and overloaded.
+ */
+void
+nxpwifi_save_curr_bcn(struct nxpwifi_private *priv)
+{
+ struct nxpwifi_bssdescriptor *curr_bss =
+ &priv->curr_bss_params.bss_descriptor;
+
+ if (!curr_bss->beacon_buf_size)
+ return;
+
+ /* allocate beacon buffer at 1st time; or if it's size has changed */
+ if (!priv->curr_bcn_buf ||
+ priv->curr_bcn_size != curr_bss->beacon_buf_size) {
+ priv->curr_bcn_size = curr_bss->beacon_buf_size;
+
+ kfree(priv->curr_bcn_buf);
+ priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
+ GFP_ATOMIC);
+ if (!priv->curr_bcn_buf)
+ return;
+ }
+
+ memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
+ curr_bss->beacon_buf_size);
+ nxpwifi_dbg(priv->adapter, INFO,
+ "info: current beacon saved %d\n",
+ priv->curr_bcn_size);
+
+ curr_bss->beacon_buf = priv->curr_bcn_buf;
+
+ /* adjust the pointers in the current BSS descriptor */
+ if (curr_bss->bcn_wpa_ie)
+ curr_bss->bcn_wpa_ie =
+ (struct ieee_types_vendor_specific *)
+ (curr_bss->beacon_buf +
+ curr_bss->wpa_offset);
+
+ if (curr_bss->bcn_rsn_ie)
+ curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
+ (curr_bss->beacon_buf +
+ curr_bss->rsn_offset);
+
+ if (curr_bss->bcn_ht_cap)
+ curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
+ (curr_bss->beacon_buf +
+ curr_bss->ht_cap_offset);
+
+ if (curr_bss->bcn_ht_oper)
+ curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *)
+ (curr_bss->beacon_buf +
+ curr_bss->ht_info_offset);
+
+ if (curr_bss->bcn_vht_cap)
+ curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf +
+ curr_bss->vht_cap_offset);
+
+ if (curr_bss->bcn_vht_oper)
+ curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf +
+ curr_bss->vht_info_offset);
+
+ if (curr_bss->bcn_bss_co_2040)
+ curr_bss->bcn_bss_co_2040 =
+ (curr_bss->beacon_buf + curr_bss->bss_co_2040_offset);
+
+ if (curr_bss->bcn_ext_cap)
+ curr_bss->bcn_ext_cap = curr_bss->beacon_buf +
+ curr_bss->ext_cap_offset;
+
+ if (curr_bss->oper_mode)
+ curr_bss->oper_mode = (void *)(curr_bss->beacon_buf +
+ curr_bss->oper_mode_offset);
+}
+
+/* This function frees the current BSS descriptor beacon buffer.
+ */
+void
+nxpwifi_free_curr_bcn(struct nxpwifi_private *priv)
+{
+ kfree(priv->curr_bcn_buf);
+ priv->curr_bcn_buf = NULL;
+}
--
2.34.1
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