[PATCH 13/13] wcn36xx: Add host resume request support

["Bryan O'Donoghue" <bryan.odonoghue@xxxxxxxxxx>]

This commit is the corresponding resume() path request to the firmware when
resuming. Unlike the suspend() version which is a unidirectional
indication, the resume version is a standard request/response.

Once the resume() request completes ipv4 ARP, ipv6 NS and GTK rekey offload
stop working and can subsequently be rolled back.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
---
 drivers/net/wireless/ath/wcn36xx/main.c |  1 +
 drivers/net/wireless/ath/wcn36xx/smd.c  | 35 +++++++++++++++++++++++++
 drivers/net/wireless/ath/wcn36xx/smd.h  |  2 ++
 3 files changed, 38 insertions(+)

diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c
index ec24b0cc5b8c..9a2a6399c8a0 100644
--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1158,6 +1158,7 @@ static int wcn36xx_resume(struct ieee80211_hw *hw)
 		if (!vif_priv->sta_assoc)
 			goto out;
 
+		wcn36xx_smd_host_resume(wcn);
 		wcn36xx_smd_set_power_params(wcn, false);
 		wcn36xx_smd_gtk_offload_get_info(wcn, vif);
 		wcn36xx_smd_gtk_offload(wcn, vif, false);
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index 5450d56d8e1c..83452d7f4634 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2989,6 +2989,40 @@ int wcn36xx_smd_wlan_host_suspend_ind(struct wcn36xx *wcn)
 	return ret;
 }
 
+int wcn36xx_smd_host_resume(struct wcn36xx *wcn)
+{
+	struct wcn36xx_hal_wlan_host_resume_req_msg msg_body;
+	struct wcn36xx_hal_host_resume_rsp_msg *rsp;
+	int ret;
+
+	mutex_lock(&wcn->hal_mutex);
+
+	INIT_HAL_MSG(msg_body, WCN36XX_HAL_HOST_RESUME_REQ);
+	msg_body.configured_mcst_bcst_filter_setting = 0;
+
+	PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
+
+	ret = wcn36xx_smd_send_and_wait(wcn, msg_body.header.len);
+	if (ret) {
+		wcn36xx_err("Sending wlan_host_resume failed\n");
+		goto out;
+	}
+	ret = wcn36xx_smd_rsp_status_check(wcn->hal_buf, wcn->hal_rsp_len);
+	if (ret) {
+		wcn36xx_err("wlan_host_resume err=%d\n", ret);
+		goto out;
+	}
+
+	rsp = (struct wcn36xx_hal_host_resume_rsp_msg *)wcn->hal_buf;
+	if (rsp->status)
+		wcn36xx_warn("wlan_host_resume status=%d\n", rsp->status);
+
+out:
+	mutex_unlock(&wcn->hal_mutex);
+
+	return ret;
+}
+
 int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
 			    void *buf, int len, void *priv, u32 addr)
 {
@@ -3040,6 +3074,7 @@ int wcn36xx_smd_rsp_process(struct rpmsg_device *rpdev,
 	case WCN36XX_HAL_HOST_OFFLOAD_RSP:
 	case WCN36XX_HAL_GTK_OFFLOAD_RSP:
 	case WCN36XX_HAL_GTK_OFFLOAD_GETINFO_RSP:
+	case WCN36XX_HAL_HOST_RESUME_RSP:
 		memcpy(wcn->hal_buf, buf, len);
 		wcn->hal_rsp_len = len;
 		complete(&wcn->hal_rsp_compl);
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.h b/drivers/net/wireless/ath/wcn36xx/smd.h
index 77efcfa145ec..6dfed8f386d9 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.h
+++ b/drivers/net/wireless/ath/wcn36xx/smd.h
@@ -163,4 +163,6 @@ bool wcn36xx_smd_is_scanning(struct wcn36xx *wcn);
 
 int wcn36xx_smd_wlan_host_suspend_ind(struct wcn36xx *wcn);
 
+int wcn36xx_smd_host_resume(struct wcn36xx *wcn);
+
 #endif	/* _SMD_H_ */
-- 
2.29.2