icnss: Add support for graceful shutdown

Add a QMI command to indicate graceful shutdown to the FW
and updating the QMI file.

Change-Id: I0360f6f5b49bc19ea4a7acbbd0e192e1596463d6
Signed-off-by: Sandeep Singh <sandsing@codeaurora.org>

drivers/soc/qcom/icnss.c

@@ -1,4 +1,4 @@
-/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2015-2019, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -1636,6 +1636,56 @@ out:
 	return ret;
 }
 
+static int wlfw_send_modem_shutdown_msg(void)
+{
+	int ret;
+	struct wlfw_shutdown_req_msg_v01 req;
+	struct wlfw_shutdown_resp_msg_v01 resp;
+	struct msg_desc req_desc, resp_desc;
+
+	if (!penv || !penv->wlfw_clnt)
+		return -ENODEV;
+
+	icnss_pr_dbg("Sending modem shutdown request, state: 0x%lx\n",
+		     penv->state);
+
+	memset(&req, 0, sizeof(req));
+	memset(&resp, 0, sizeof(resp));
+
+	req.shutdown_valid = 1;
+	req.shutdown = 1;
+
+	req_desc.max_msg_len = WLFW_SHUTDOWN_REQ_MSG_V01_MAX_MSG_LEN;
+	req_desc.msg_id = QMI_WLFW_SHUTDOWN_REQ_V01;
+	req_desc.ei_array = wlfw_shutdown_req_msg_v01_ei;
+
+	resp_desc.max_msg_len = WLFW_SHUTDOWN_RESP_MSG_V01_MAX_MSG_LEN;
+	resp_desc.msg_id = QMI_WLFW_SHUTDOWN_RESP_V01;
+	resp_desc.ei_array = wlfw_shutdown_resp_msg_v01_ei;
+
+	ret = qmi_send_req_wait(penv->wlfw_clnt, &req_desc, &req, sizeof(req),
+				&resp_desc, &resp, sizeof(resp),
+				WLFW_TIMEOUT_MS);
+	if (ret < 0) {
+		icnss_pr_err("Send modem shutdown req failed, ret: %d\n", ret);
+		goto out;
+	}
+
+	if (resp.resp.result != QMI_RESULT_SUCCESS_V01) {
+		icnss_pr_err("QMI modem shutdown request rejected result:%d error:%d\n",
+			     resp.resp.result, resp.resp.error);
+		ret = -resp.resp.result;
+		goto out;
+	}
+
+	icnss_pr_dbg("modem shutdown request sent successfully, state: 0x%lx\n",
+		     penv->state);
+	return 0;
+
+out:
+	return ret;
+}
+
 static int wlfw_athdiag_read_send_sync_msg(struct icnss_priv *priv,
 					   uint32_t offset, uint32_t mem_type,
 					   uint32_t data_len, uint8_t *data)
@@ -2534,6 +2584,13 @@ static int icnss_modem_notifier_nb(struct notifier_block *nb,
 	if (code != SUBSYS_BEFORE_SHUTDOWN)
 		return NOTIFY_OK;
 
+	if (code == SUBSYS_BEFORE_SHUTDOWN && !notif->crashed) {
+		ret = wlfw_send_modem_shutdown_msg();
+		if (ret)
+		icnss_pr_dbg("Fail to send modem shutdown Indication %d\n",
+		ret);
+	}
+
 	if (test_bit(ICNSS_PDR_REGISTERED, &priv->state)) {
 		set_bit(ICNSS_FW_DOWN, &priv->state);
 		icnss_ignore_qmi_timeout(true);