ath11k: Designating channel frequency when sending management frames

In case of Passpoint, the WLAN interface may be requested to
remain on a specific channel and then to send some management
frames on that channel. Now chanfreq of wmi_mgmt_send_cmd is set
as 0, as a result firmware may choose a default but wrong channel.
Fix it by assigning chanfreq field with the designated channel.

This change only applies to WCN6855 and QCA6390, other chips are
not affected.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1
Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220506013614.1580274-4-quic_bqiang@quicinc.com

drivers/net/wireless/ath/ath11k/core.c

@@ -110,6 +110,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.dp_window_idx = 0,
 		.ce_window_idx = 0,
 		.fixed_fw_mem = false,
+		.support_off_channel_tx = false,
 	},
 	{
 		.hw_rev = ATH11K_HW_IPQ6018_HW10,
@@ -185,6 +186,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.dp_window_idx = 0,
 		.ce_window_idx = 0,
 		.fixed_fw_mem = false,
+		.support_off_channel_tx = false,
 	},
 	{
 		.name = "qca6390 hw2.0",
@@ -259,6 +261,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.dp_window_idx = 0,
 		.ce_window_idx = 0,
 		.fixed_fw_mem = false,
+		.support_off_channel_tx = true,
 	},
 	{
 		.name = "qcn9074 hw1.0",
@@ -333,6 +336,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.dp_window_idx = 3,
 		.ce_window_idx = 2,
 		.fixed_fw_mem = false,
+		.support_off_channel_tx = false,
 	},
 	{
 		.name = "wcn6855 hw2.0",
@@ -407,6 +411,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.dp_window_idx = 0,
 		.ce_window_idx = 0,
 		.fixed_fw_mem = false,
+		.support_off_channel_tx = true,
 	},
 	{
 		.name = "wcn6855 hw2.1",
@@ -480,6 +485,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.dp_window_idx = 0,
 		.ce_window_idx = 0,
 		.fixed_fw_mem = false,
+		.support_off_channel_tx = true,
 	},
 	{
 		.name = "wcn6750 hw1.0",
@@ -553,6 +559,7 @@ static const struct ath11k_hw_params ath11k_hw_params[] = {
 		.dp_window_idx = 1,
 		.ce_window_idx = 2,
 		.fixed_fw_mem = true,
+		.support_off_channel_tx = false,
 	},
 };
 

drivers/net/wireless/ath/ath11k/hw.h

@@ -204,6 +204,7 @@ struct ath11k_hw_params {
 	u8 dp_window_idx;
 	u8 ce_window_idx;
 	bool fixed_fw_mem;
+	bool support_off_channel_tx;
 };
 
 struct ath11k_hw_ops {

drivers/net/wireless/ath/ath11k/wmi.c

@@ -625,10 +625,25 @@ struct sk_buff *ath11k_wmi_alloc_skb(struct ath11k_wmi_base *wmi_sc, u32 len)
 	return skb;
 }
 
+static u32 ath11k_wmi_mgmt_get_freq(struct ath11k *ar,
+				    struct ieee80211_tx_info *info)
+{
+	struct ath11k_base *ab = ar->ab;
+	u32 freq = 0;
+
+	if (ab->hw_params.support_off_channel_tx &&
+	    ar->scan.is_roc &&
+	    (info->flags & IEEE80211_TX_CTL_TX_OFFCHAN))
+		freq = ar->scan.roc_freq;
+
+	return freq;
+}
+
 int ath11k_wmi_mgmt_send(struct ath11k *ar, u32 vdev_id, u32 buf_id,
 			 struct sk_buff *frame)
 {
 	struct ath11k_pdev_wmi *wmi = ar->wmi;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(frame);
 	struct wmi_mgmt_send_cmd *cmd;
 	struct wmi_tlv *frame_tlv;
 	struct sk_buff *skb;
@@ -649,7 +664,7 @@ int ath11k_wmi_mgmt_send(struct ath11k *ar, u32 vdev_id, u32 buf_id,
 			  FIELD_PREP(WMI_TLV_LEN, sizeof(*cmd) - TLV_HDR_SIZE);
 	cmd->vdev_id = vdev_id;
 	cmd->desc_id = buf_id;
-	cmd->chanfreq = 0;
+	cmd->chanfreq = ath11k_wmi_mgmt_get_freq(ar, info);
 	cmd->paddr_lo = lower_32_bits(ATH11K_SKB_CB(frame)->paddr);
 	cmd->paddr_hi = upper_32_bits(ATH11K_SKB_CB(frame)->paddr);
 	cmd->frame_len = frame->len;