Set the RPS configuration on Wi-Fi activate.

This patch enable RPS (Received packet steering) and specific CPUs
to process the packet for the receive queues of the wlan0 interface.

Change-Id: Ide73358ac99f49eb2c7254fe1a7026f491e58cfd
Signed-off-by: Mayank Haarit <mayank.h@samsung.com>

diff --git a/src/wifi-firmware.c b/src/wifi-firmware.c
index 2195913..60a7abe 100755 (executable)
--- a/src/wifi-firmware.c
+++ b/src/wifi-firmware.c
@@ -20,6 +20,8 @@
 #include <errno.h>
 #include <vconf.h>
 #include <vconf-keys.h>
+#include <stdio.h>
+#include <fcntl.h>
 
 #include "log.h"
 #include "util.h"
@@ -36,6 +38,9 @@
 #define WLAN_P2P_IFACE_NAME_TV                 "p2p0"
 #define WLAN_P2P_IFACE_NAME_COMMON                     "wlan0"
 #define WLAN_P2P_IFACE_NAME ((TIZEN_TV) ? (WLAN_P2P_IFACE_NAME_TV) : (WLAN_P2P_IFACE_NAME_COMMON))
+#define QUAD_CPUS_COUNT                        4
+#define TEMP_BUFFER_LEN                        100
+#define WIFI_MAC_ADD_PATH              "/sys/class/net/wlan0/address"
 
 static int __netconfig_sta_firmware_start(void)
 {
@@ -205,6 +210,69 @@ static int __netconfig_wifi_firmware_stop(enum netconfig_wifi_firmware type)
        return -ENXIO;
 }
 
+static int __netconfig_set_rps_cpus(void)
+{
+       int fd, i;
+       ssize_t count;
+       char t_buf[TEMP_BUFFER_LEN];
+       char r_buf[TEMP_BUFFER_LEN];
+
+       if (access(WIFI_MAC_ADD_PATH, F_OK) != 0) {
+               DBG("WiFi driver is not loaded... ");
+               return -1;
+       } else {
+               DBG("WiFi driver loaded... ");
+       }
+
+       for (i = 0; i < QUAD_CPUS_COUNT; i++) {
+               snprintf(t_buf, TEMP_BUFFER_LEN, "/sys/class/net/wlan0/queues/rx-%d/rps_cpus", i);
+               DBG("Command : [%s]", t_buf);
+               fd = open(t_buf, O_RDWR | O_CLOEXEC);
+
+               if (fd < 0) {
+                       DBG("failed to open rps file");
+                       return -1;
+               } else {
+                       count = read(fd, r_buf, 1);
+
+                       if (count < 0) {
+                               DBG("read failed");
+                               close(fd);
+                               return -1;
+                       } else {
+                               DBG("read size = %d", count);
+                       }
+
+                       if (r_buf[0] == 'e') {
+                               close(fd);
+                               continue;
+                       } else {
+                               DBG("e is already written");
+                       }
+
+                       if (lseek(fd, 0, SEEK_SET) < 0) {
+                               DBG("lseek failed");
+                               close(fd);
+                               return -1;
+                       }
+
+                       count = write(fd, "e", 1);
+
+                       if (count < 0) {
+                               DBG("write failed");
+                               close(fd);
+                               return -1;
+                       } else {
+                               DBG("write size = %d", count);
+                       }
+
+                       close(fd);
+               }
+       }
+
+       return 0;
+}
+
 int netconfig_wifi_firmware(enum netconfig_wifi_firmware type, gboolean enable)
 {
        int err;
@@ -244,6 +312,9 @@ int netconfig_wifi_firmware(enum netconfig_wifi_firmware type, gboolean enable)
        else
                current_driver = alias;
 
+       if (__netconfig_set_rps_cpus() < 0)
+               DBG("Failed to set rps_cpus");
+
        return err;
 }