[TG3]: Set minimal hw interrupt mitigation.
Even though we do software interrupt mitigation
via NAPI, it still helps to have some minimal
hw assisted mitigation.
This helps, particularly, on systems where register
I/O overhead is much greater than the CPU horsepower.
For example, it helps on NUMA systems. In such cases
the PIO overhead to disable interrupts for NAPI accounts
for the majority of the packet processing cost. The
CPU is fast enough such that only a single packet is
processed by each NAPI poll call.
Thanks to Michael Chan for reviewing this patch.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 44c6516..993f84c 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -876,10 +876,12 @@
#define HOSTCC_STATUS_ERROR_ATTN 0x00000004
#define HOSTCC_RXCOL_TICKS 0x00003c08
#define LOW_RXCOL_TICKS 0x00000032
+#define LOW_RXCOL_TICKS_CLRTCKS 0x00000014
#define DEFAULT_RXCOL_TICKS 0x00000048
#define HIGH_RXCOL_TICKS 0x00000096
#define HOSTCC_TXCOL_TICKS 0x00003c0c
#define LOW_TXCOL_TICKS 0x00000096
+#define LOW_TXCOL_TICKS_CLRTCKS 0x00000048
#define DEFAULT_TXCOL_TICKS 0x0000012c
#define HIGH_TXCOL_TICKS 0x00000145
#define HOSTCC_RXMAX_FRAMES 0x00003c10
@@ -892,8 +894,10 @@
#define HIGH_TXMAX_FRAMES 0x00000052
#define HOSTCC_RXCOAL_TICK_INT 0x00003c18
#define DEFAULT_RXCOAL_TICK_INT 0x00000019
+#define DEFAULT_RXCOAL_TICK_INT_CLRTCKS 0x00000014
#define HOSTCC_TXCOAL_TICK_INT 0x00003c1c
#define DEFAULT_TXCOAL_TICK_INT 0x00000019
+#define DEFAULT_TXCOAL_TICK_INT_CLRTCKS 0x00000014
#define HOSTCC_RXCOAL_MAXF_INT 0x00003c20
#define DEFAULT_RXCOAL_MAXF_INT 0x00000005
#define HOSTCC_TXCOAL_MAXF_INT 0x00003c24
@@ -2227,7 +2231,7 @@
#define SST_25VF0X0_PAGE_SIZE 4098
-
+ struct ethtool_coalesce coal;
};
#endif /* !(_T3_H) */