via-velocity: Add ethtool interrupt coalescing support

(Partially from the upstream VIA driver). Tweaking the number of
frames-per-interrupt and timer-until-interrupt can reduce the amount of
CPU work quite a lot.

Signed-off-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/net/via-velocity.h b/drivers/net/via-velocity.h
index ce894ffa7c91..499da64773ee 100644
--- a/drivers/net/via-velocity.h
+++ b/drivers/net/via-velocity.h
@@ -1005,7 +1005,8 @@ struct mac_regs {
 
         volatile __le32 RDBaseLo;       /* 0x38 */
         volatile __le16 RDIdx;          /* 0x3C */
-        volatile __le16 reserved_3E;
+        volatile u8 TQETMR;             /* 0x3E, VT3216 and above only */
+        volatile u8 RQETMR;             /* 0x3F, VT3216 and above only */
 
         volatile __le32 TDBaseLo[4];    /* 0x40 */
 
@@ -1491,6 +1492,10 @@ struct velocity_opt {
         int rx_bandwidth_hi;
         int rx_bandwidth_lo;
         int rx_bandwidth_en;
+        int rxqueue_timer;
+        int txqueue_timer;
+        int tx_intsup;
+        int rx_intsup;
         u32 flags;
 };