+
+ return false;
+}
+#endif /* CONFIG_CARL9170FW_WOL_MAGIC_PACKET */
+
+#ifdef CONFIG_CARL9170FW_WOL_PROBE_REQUEST
+
+/*
+ * Note: CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID is not a real
+ * string. We have to be careful not to add a \0 at the end.
+ */
+static const struct {
+ u8 ssid_ie;
+ u8 ssid_len;
+ u8 ssid[sizeof(CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID) - 1];
+} __packed probe_req = {
+ .ssid_ie = WLAN_EID_SSID,
+ .ssid_len = sizeof(CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID) - 1,
+ .ssid = CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID,
+};
+
+static bool wlan_rx_wol_probe_ssid(struct ieee80211_hdr *hdr, unsigned int len)
+{
+ const unsigned char *data, *end, *scan = (void *) &probe_req;
+
+ /*
+ * IEEE 802.11-2007 7.3.2.1 specifies that the SSID is no
+ * longer than 32 octets.
+ */
+ BUILD_BUG_ON((sizeof(CONFIG_CARL9170FW_WOL_PROBE_REQUEST_SSID) - 1) > 32);
+
+ if (ieee80211_is_probe_req(hdr->frame_control)) {
+ unsigned int i;
+ end = (u8 *)((unsigned long)hdr + len);
+
+ /*
+ * The position of the SSID information element inside
+ * a probe request frame is more or less "fixed".
+ */
+ data = (u8 *)((struct ieee80211_mgmt *)hdr)->u.probe_req.variable;
+ for (i = 0; i < (unsigned int)(probe_req.ssid_len + 1); i++) {
+ if (scan[i] != data[i])
+ return false;
+ }
+
+ return true;
+ }
+
+ return false;
+}
+#endif /* CONFIG_CARL9170FW_WOL_PROBE_REQUEST */
+
+static void wlan_rx_wol(unsigned int rx_filter __unused, struct ieee80211_hdr *hdr __unused, unsigned int len __unused)
+{
+ bool __unused wake_up = false;
+
+#ifdef CONFIG_CARL9170FW_WOL_MAGIC_PACKET
+ if (rx_filter & CARL9170_RX_FILTER_DATA)
+ wake_up |= wlan_rx_wol_magic_packet(hdr, len);
+#endif /* CONFIG_CARL9170FW_WOL_MAGIC_PACKET */
+
+#ifdef CONFIG_CARL9170FW_WOL_PROBE_REQUEST
+ if (rx_filter & CARL9170_RX_FILTER_MGMT)
+ wake_up |= wlan_rx_wol_probe_ssid(hdr, len);
+#endif /* CONFIG_CARL9170FW_WOL_PROBE_REQUEST */
+
+ if (wake_up) {
+ fw.suspend_mode = CARL9170_AWAKE_HOST;
+ set(AR9170_USB_REG_WAKE_UP, AR9170_USB_WAKE_UP_WAKE);
+ }
+}
+#endif /* CONFIG_CARL9170FW_WOL */
+
+static unsigned int wlan_rx_filter(struct dma_desc *desc)
+{
+ struct ieee80211_hdr *hdr;
+ unsigned int data_len;
+ unsigned int rx_filter;
+ unsigned int mac_err;
+
+ data_len = ar9170_get_rx_mpdu_len(desc);
+ mac_err = ar9170_get_rx_macstatus_error(desc);
+
+#define AR9170_RX_ERROR_BAD (AR9170_RX_ERROR_FCS | AR9170_RX_ERROR_PLCP)
+
+ if (unlikely(data_len < (4 + 6 + FCS_LEN) ||
+ desc->totalLen > CONFIG_CARL9170FW_RX_FRAME_LEN) ||
+ mac_err & AR9170_RX_ERROR_BAD) {
+ /*
+ * This frame is too damaged to do anything
+ * useful with it.
+ */
+
+ return CARL9170_RX_FILTER_BAD;
+ }
+
+ rx_filter = 0;
+ if (mac_err & AR9170_RX_ERROR_WRONG_RA)
+ rx_filter |= CARL9170_RX_FILTER_OTHER_RA;
+
+ if (mac_err & AR9170_RX_ERROR_DECRYPT)
+ rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL;
+
+ hdr = ar9170_get_rx_i3e(desc);
+ if (likely(ieee80211_is_data(hdr->frame_control))) {
+ rx_filter |= CARL9170_RX_FILTER_DATA;
+ } else if (ieee80211_is_ctl(hdr->frame_control)) {
+ switch (le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_STYPE) {
+ case IEEE80211_STYPE_BACK_REQ:
+ handle_bar(desc, hdr, data_len, mac_err);
+ /* fallthrough */
+ rx_filter |= CARL9170_RX_FILTER_CTL_BACKR;
+ break;
+ case IEEE80211_STYPE_PSPOLL:
+ rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL;
+ break;
+ default:
+ rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
+ break;
+ }
+ } else {
+ /* ieee80211_is_mgmt */
+ rx_filter |= CARL9170_RX_FILTER_MGMT;
+ }
+
+#ifdef CONFIG_CARL9170FW_WOL
+ if (unlikely(fw.suspend_mode == CARL9170_HOST_SUSPENDED)) {
+ wlan_rx_wol(rx_filter, hdr, min(data_len,
+ (unsigned int)AR9170_BLOCK_SIZE));
+ }
+#endif /* CONFIG_CARL9170FW_WOL */
+
+#undef AR9170_RX_ERROR_BAD
+
+ return rx_filter;