qcacld-3.0: Add feature of auto-generate mac address

Auto-generate mac address using device serial number when the mac
address that passed from WLAN FW is invalid and no mac address
specified in ini file and no user defined mac address in wlan_mac.bin .

CRs-Fixed: 1047629
Change-Id: I4ecc901558bc526c99f8b9bdb9442a4d288b313c

core/hdd/src/wlan_hdd_main.c

@@ -77,6 +77,7 @@
 #ifdef MSM_PLATFORM
 #include <soc/qcom/subsystem_restart.h>
 #endif
+#include <soc/qcom/socinfo.h>
 #include <wlan_hdd_hostapd.h>
 #include <wlan_hdd_softap_tx_rx.h>
 #include "cfg_api.h"
@@ -1342,6 +1343,38 @@ static void hdd_update_tgt_vht_cap(hdd_context_t *hdd_ctx,
 
 }
 
+/**
+ * hdd_generate_macaddr_auto() - Auto-generate mac address
+ * @hdd_ctx: Pointer to the HDD context
+ *
+ * Auto-generate mac address using device serial number.
+ * Keep the first 3 bytes of OUI as before and replace
+ * the last 3 bytes with the lower 3 bytes of serial number.
+ *
+ * Return: 0 for success
+ *         Non zero failure code for errors
+ */
+static int hdd_generate_macaddr_auto(hdd_context_t *hdd_ctx)
+{
+	unsigned int serialno = 0;
+	struct qdf_mac_addr mac_addr = {
+		{0x00, 0x0A, 0xF5, 0x00, 0x00, 0x00}
+	};
+
+	serialno = socinfo_get_serial_number();
+	if (serialno == 0)
+		return -EINVAL;
+
+	serialno &= 0x00ffffff;
+
+	mac_addr.bytes[3] = (serialno >> 16) & 0xff;
+	mac_addr.bytes[4] = (serialno >> 8) & 0xff;
+	mac_addr.bytes[5] = serialno & 0xff;
+
+	hdd_update_macaddr(hdd_ctx->config, mac_addr);
+	return 0;
+}
+
 void hdd_update_tgt_cfg(void *context, void *param)
 {
 	hdd_context_t *hdd_ctx = (hdd_context_t *) context;
@@ -1389,11 +1422,22 @@ void hdd_update_tgt_cfg(void *context, void *param)
 	if (!qdf_is_macaddr_zero(&cfg->hw_macaddr)) {
 		hdd_update_macaddr(hdd_ctx->config, cfg->hw_macaddr);
 	} else {
-		hddLog(QDF_TRACE_LEVEL_ERROR,
-		       FL(
-			  "Invalid MAC passed from target, using MAC from ini file"
-			  MAC_ADDRESS_STR),
-		       MAC_ADDR_ARRAY(hdd_ctx->config->intfMacAddr[0].bytes));
+		static struct qdf_mac_addr default_mac_addr = {
+			{0x00, 0x0A, 0xF5, 0x89, 0x89, 0xFF}
+		};
+		if (qdf_is_macaddr_equal(&hdd_ctx->config->intfMacAddr[0],
+					 &default_mac_addr)) {
+			if (hdd_generate_macaddr_auto(hdd_ctx) != 0)
+				hdd_err("Fail to auto-generate MAC, using MAC from ini file "
+					MAC_ADDRESS_STR,
+					MAC_ADDR_ARRAY(hdd_ctx->config->
+						       intfMacAddr[0].bytes));
+		} else {
+			hdd_err("Invalid MAC passed from target, using MAC from ini file "
+				MAC_ADDRESS_STR,
+				MAC_ADDR_ARRAY(hdd_ctx->config->
+					       intfMacAddr[0].bytes));
+		}
 	}
 
 	hdd_ctx->target_fw_version = cfg->target_fw_version;