qtnfmac: add support for scan flush

Notify firmware to flush cache before scanning when needed.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/quantenna/qtnfmac/commands.c b/drivers/net/wireless/quantenna/qtnfmac/commands.c
index 8dbd6c4..8fb15cb 100644 (file)
--- a/drivers/net/wireless/quantenna/qtnfmac/commands.c
+++ b/drivers/net/wireless/quantenna/qtnfmac/commands.c
@@ -2197,6 +2197,12 @@ int qtnf_cmd_send_scan(struct qtnf_wmac *mac)
                                         scan_req->mac_addr_mask);
        }
 
+       if (scan_req->flags & NL80211_SCAN_FLAG_FLUSH) {
+               pr_debug("MAC%u: flush cache before scan\n", mac->macid);
+
+               qtnf_cmd_skb_put_tlv_tag(cmd_skb, QTN_TLV_ID_SCAN_FLUSH);
+       }
+
        ret = qtnf_cmd_send(mac->bus, cmd_skb);
        if (ret)
                goto out;

diff --git a/drivers/net/wireless/quantenna/qtnfmac/qlink.h b/drivers/net/wireless/quantenna/qtnfmac/qlink.h
index c5ae4ea..6991571 100644 (file)
--- a/drivers/net/wireless/quantenna/qtnfmac/qlink.h
+++ b/drivers/net/wireless/quantenna/qtnfmac/qlink.h
@@ -1151,6 +1151,7 @@ enum qlink_tlv_id {
        QTN_TLV_ID_MAX_SCAN_SSIDS       = 0x0409,
        QTN_TLV_ID_WOWLAN_CAPAB         = 0x0410,
        QTN_TLV_ID_WOWLAN_PATTERN       = 0x0411,
+       QTN_TLV_ID_SCAN_FLUSH           = 0x0412,
 };
 
 struct qlink_tlv_hdr {

diff --git a/drivers/net/wireless/quantenna/qtnfmac/qlink_util.h b/drivers/net/wireless/quantenna/qtnfmac/qlink_util.h
index 54caeb3..960d5d9 100644 (file)
--- a/drivers/net/wireless/quantenna/qtnfmac/qlink_util.h
+++ b/drivers/net/wireless/quantenna/qtnfmac/qlink_util.h
@@ -40,6 +40,14 @@ static inline void qtnf_cmd_skb_put_tlv_arr(struct sk_buff *skb,
        memcpy(hdr->val, arr, arr_len);
 }
 
+static inline void qtnf_cmd_skb_put_tlv_tag(struct sk_buff *skb, u16 tlv_id)
+{
+       struct qlink_tlv_hdr *hdr = skb_put(skb, sizeof(*hdr));
+
+       hdr->type = cpu_to_le16(tlv_id);
+       hdr->len = cpu_to_le16(0);
+}
+
 static inline void qtnf_cmd_skb_put_tlv_u8(struct sk_buff *skb, u16 tlv_id,
                                           u8 value)
 {