S2IO: Save/Restore unused buffer mappings in 2/3 buffer mode

- Save/Restore unused buffer mappings in 2/3 buffer mode to avoid
frequent mapping

- Save/Restore adapter reset count during adapter reset

  (Resending; forgot to cc netdev)

Signed-off-by: Santosh Rastapur <santosh.rastapur@neterion.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 16 insertions, 4 deletions

diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index 7309a178b1ac..049060cb6a05 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -84,7 +84,7 @@
 #include "s2io.h"
 #include "s2io-regs.h"
 
-#define DRV_VERSION "2.0.17.1"
+#define DRV_VERSION "2.0.19.1"
 
 /* S2io Driver name & version. */
 static char s2io_driver_name[] = "Neterion";
@@ -2242,6 +2242,7 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no)
         struct buffAdd *ba;
         unsigned long flags;
         struct RxD_t *first_rxdp = NULL;
+        u64 Buffer0_ptr = 0, Buffer1_ptr = 0;
 
         mac_control = &nic->mac_control;
         config = &nic->config;
@@ -2342,7 +2343,14 @@ static int fill_rx_buffers(struct s2io_nic *nic, int ring_no)
                          * payload
                          */
 
+                        /* save the buffer pointers to avoid frequent dma mapping */
+                        Buffer0_ptr = ((struct RxD3*)rxdp)->Buffer0_ptr;
+                        Buffer1_ptr = ((struct RxD3*)rxdp)->Buffer1_ptr;
                         memset(rxdp, 0, sizeof(struct RxD3));
+                        /* restore the buffer pointers for dma sync*/
+                        ((struct RxD3*)rxdp)->Buffer0_ptr = Buffer0_ptr;
+                        ((struct RxD3*)rxdp)->Buffer1_ptr = Buffer1_ptr;
+
                         ba = &mac_control->rings[ring_no].ba[block_no][off];
                         skb_reserve(skb, BUF0_LEN);
                         tmp = (u64)(unsigned long) skb->data;
@@ -3307,6 +3315,7 @@ static void s2io_reset(struct s2io_nic * sp)
         u16 subid, pci_cmd;
         int i;
         u16 val16;
+        unsigned long long reset_cnt = 0;
         DBG_PRINT(INIT_DBG,"%s - Resetting XFrame card %s\n",
                         __FUNCTION__, sp->dev->name);
 
@@ -3372,6 +3381,11 @@ new_way:
 
         /* Reset device statistics maintained by OS */
         memset(&sp->stats, 0, sizeof (struct net_device_stats));
+        /* save reset count */
+        reset_cnt = sp->mac_control.stats_info->sw_stat.soft_reset_cnt;
+        memset(sp->mac_control.stats_info, 0, sizeof(struct stat_block));
+        /* restore reset count */
+        sp->mac_control.stats_info->sw_stat.soft_reset_cnt = reset_cnt;
 
         /* SXE-002: Configure link and activity LED to turn it off */
         subid = sp->pdev->subsystem_device;
@@ -4279,9 +4293,7 @@ static void s2io_updt_stats(struct s2io_nic *sp)
                         if (cnt == 5)
                                 break; /* Updt failed */
                 } while(1);
-        } else {
-                memset(sp->mac_control.stats_info, 0, sizeof(struct stat_block));
-        }
+        } 
 }
 
 /**