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authorDavid S. Miller <davem@davemloft.net>2005-05-18 22:49:26 -0700
committerDavid S. Miller <davem@davemloft.net>2005-05-18 22:49:26 -0700
commit15f9850d3c2d46f5851a424d2990a18b5bb5ebfd (patch)
treea96514f0f797e0a315e12450279d103a888d1083 /drivers/net/tg3.h
parentfac9b83ea79aa3112ed245d9a4fc2a5c3ec2b7ec (diff)
[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>
Diffstat (limited to 'drivers/net/tg3.h')
-rw-r--r--drivers/net/tg3.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 44c65160a20..993f84c93dc 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 @@ struct tg3 {
#define SST_25VF0X0_PAGE_SIZE 4098
-
+ struct ethtool_coalesce coal;
};
#endif /* !(_T3_H) */