staging: wilc1000: increase link speed

This patch increases throughput by enabling tcp ack filter base on checking
statistics and also handling tcp session.

Signed-off-by: Glen Lee <glen.lee@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/wilc1000/host_interface.c b/drivers/staging/wilc1000/host_interface.c
index 7e1b5a0..4bbf38c 100644 (file)
--- a/drivers/staging/wilc1000/host_interface.c
+++ b/drivers/staging/wilc1000/host_interface.c
@@ -57,6 +57,9 @@
 #define BLOCK_ACK_REQ_SIZE                      0x14
 #define FALSE_FRMWR_CHANNEL                    100
 
+#define TCP_ACK_FILTER_LINK_SPEED_THRESH       54
+#define DEFAULT_LINK_SPEED                     72
+
 struct cfg_param_attr {
        struct cfg_param_val cfg_attr_info;
 };
@@ -2187,7 +2190,14 @@ static s32 Handle_GetStatistics(struct wilc_vif *vif,
        if (result)
                PRINT_ER("Failed to send scan paramters config packet\n");
 
-       up(&hif_sema_wait_response);
+       if (pstrStatistics->link_speed > TCP_ACK_FILTER_LINK_SPEED_THRESH &&
+           pstrStatistics->link_speed != DEFAULT_LINK_SPEED)
+               wilc_enable_tcp_ack_filter(true);
+       else if (pstrStatistics->link_speed != DEFAULT_LINK_SPEED)
+               wilc_enable_tcp_ack_filter(false);
+
+       if (pstrStatistics != &vif->wilc->dummy_statistics)
+               up(&hif_sema_wait_response);
        return 0;
 }
 
@@ -3606,7 +3616,8 @@ int wilc_get_statistics(struct wilc_vif *vif, struct rf_info *stats)
                return -EFAULT;
        }
 
-       down(&hif_sema_wait_response);
+       if (stats != &vif->wilc->dummy_statistics)
+               down(&hif_sema_wait_response);
        return result;
 }
 
@@ -3698,21 +3709,9 @@ static void GetPeriodicRSSI(unsigned long arg)
                return;
        }
 
-       if (vif->hif_drv->hif_state == HOST_IF_CONNECTED) {
-               s32 result = 0;
-               struct host_if_msg msg;
-
-               memset(&msg, 0, sizeof(struct host_if_msg));
-
-               msg.id = HOST_IF_MSG_GET_RSSI;
-               msg.vif = vif;
+       if (vif->hif_drv->hif_state == HOST_IF_CONNECTED)
+               wilc_get_statistics(vif, &vif->wilc->dummy_statistics);
 
-               result = wilc_mq_send(&hif_msg_q, &msg, sizeof(struct host_if_msg));
-               if (result) {
-                       PRINT_ER("Failed to send get host channel param's message queue ");
-                       return;
-               }
-       }
        periodic_rssi.data = (unsigned long)vif;
        mod_timer(&periodic_rssi, jiffies + msecs_to_jiffies(5000));
 }

diff --git a/drivers/staging/wilc1000/wilc_wfi_netdevice.h b/drivers/staging/wilc1000/wilc_wfi_netdevice.h
index 54e762e..9f8c79e 100644 (file)
--- a/drivers/staging/wilc1000/wilc_wfi_netdevice.h
+++ b/drivers/staging/wilc1000/wilc_wfi_netdevice.h
@@ -217,6 +217,8 @@ struct wilc {
 
        struct device *dev;
        bool suspend_event;
+
+       struct rf_info dummy_statistics;
 };
 
 struct WILC_WFI_mon_priv {

diff --git a/drivers/staging/wilc1000/wilc_wlan.c b/drivers/staging/wilc1000/wilc_wlan.c
index 9442016..04d4c92 100644 (file)
--- a/drivers/staging/wilc1000/wilc_wlan.c
+++ b/drivers/staging/wilc1000/wilc_wlan.c
@@ -178,19 +178,21 @@ static inline int init_tcp_tracking(void)
 
 static inline int add_tcp_session(u32 src_prt, u32 dst_prt, u32 seq)
 {
-       ack_session_info[tcp_session].seq_num = seq;
-       ack_session_info[tcp_session].bigger_ack_num = 0;
-       ack_session_info[tcp_session].src_port = src_prt;
-       ack_session_info[tcp_session].dst_port = dst_prt;
-       tcp_session++;
-
+       if (tcp_session < 2 * MAX_TCP_SESSION) {
+               ack_session_info[tcp_session].seq_num = seq;
+               ack_session_info[tcp_session].bigger_ack_num = 0;
+               ack_session_info[tcp_session].src_port = src_prt;
+               ack_session_info[tcp_session].dst_port = dst_prt;
+               tcp_session++;
+       }
        PRINT_D(TCP_ENH, "TCP Session %d to Ack %d\n", tcp_session, seq);
        return 0;
 }
 
 static inline int update_tcp_session(u32 index, u32 ack)
 {
-       if (ack > ack_session_info[index].bigger_ack_num)
+       if (index < 2 * MAX_TCP_SESSION &&
+           ack > ack_session_info[index].bigger_ack_num)
                ack_session_info[index].bigger_ack_num = ack;
        return 0;
 }
@@ -198,7 +200,7 @@ static inline int update_tcp_session(u32 index, u32 ack)
 static inline int add_tcp_pending_ack(u32 ack, u32 session_index,
                                      struct txq_entry_t *txqe)
 {
-       if (pending_acks < MAX_PENDING_ACKS) {
+       if (pending_base + pending_acks < MAX_PENDING_ACKS) {
                pending_acks_info[pending_base + pending_acks].ack_num = ack;
                pending_acks_info[pending_base + pending_acks].txqe = txqe;
                pending_acks_info[pending_base + pending_acks].session_index = session_index;
@@ -265,7 +267,8 @@ static inline int tcp_process(struct net_device *dev, struct txq_entry_t *tqe)
                                         (u32)tcp_hdr_ptr[11];
 
                                for (i = 0; i < tcp_session; i++) {
-                                       if (ack_session_info[i].seq_num == seq_no) {
+                                       if (i < 2 * MAX_TCP_SESSION &&
+                                           ack_session_info[i].seq_num == seq_no) {
                                                update_tcp_session(i, ack_no);
                                                break;
                                        }
@@ -298,6 +301,9 @@ static int wilc_wlan_txq_filter_dup_tcp_ack(struct net_device *dev)
 
        spin_lock_irqsave(&wilc->txq_spinlock, wilc->txq_spinlock_flags);
        for (i = pending_base; i < (pending_base + pending_acks); i++) {
+               if (i >= MAX_PENDING_ACKS ||
+                   pending_acks_info[i].session_index >= 2 * MAX_TCP_SESSION)
+                       break;
                if (pending_acks_info[i].ack_num < ack_session_info[pending_acks_info[i].session_index].bigger_ack_num) {
                        struct txq_entry_t *tqe;
 
@@ -815,7 +821,8 @@ int wilc_wlan_handle_txq(struct net_device *dev, u32 *txq_count)
                                if (tqe->tx_complete_func)
                                        tqe->tx_complete_func(tqe->priv,
                                                              tqe->status);
-                               if (tqe->tcp_pending_ack_idx != NOT_TCP_ACK)
+                               if (tqe->tcp_pending_ack_idx != NOT_TCP_ACK &&
+                                   tqe->tcp_pending_ack_idx < MAX_PENDING_ACKS)
                                        pending_acks_info[tqe->tcp_pending_ack_idx].txqe = NULL;
                                kfree(tqe);
                        } else {