diff options
| author | Stephen Hemminger <shemminger@linux-foundation.org> | 2007-04-11 14:48:01 -0700 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-04-19 15:01:17 -0400 |
| commit | b628ed986d681c708aec64418c2c7f6a6b715855 (patch) | |
| tree | 6ade1dbf518f3b1605046b8f3ee36bf988c393a6 /drivers/net/sky2.h | |
| parent | 4f44d8ba09280a7f0887ab60277940d6c72f2b43 (diff) | |
| download | lwn-b628ed986d681c708aec64418c2c7f6a6b715855.tar.gz lwn-b628ed986d681c708aec64418c2c7f6a6b715855.zip | |
sky2: EC-U performance and jumbo support
The Yukon EC Ultra chips have transmit settings for store and
forward and PCI buffering. By setting these appropriately, normal
performance goes from 750Mbytes/sec to 940Mbytes/sec (non-jumbo).
It is also possible to do Jumbo mode, but it means turning off
TSO and checksum offload so the performance gets worse. There isn't
enough buffering for checksum offload to work.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/sky2.h')
| -rw-r--r-- | drivers/net/sky2.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h index 9ca4a2c061c6..5efb5afc45ba 100644 --- a/drivers/net/sky2.h +++ b/drivers/net/sky2.h @@ -741,6 +741,11 @@ enum { TX_GMF_RP = 0x0d70,/* 32 bit Tx GMAC FIFO Read Pointer */ TX_GMF_RSTP = 0x0d74,/* 32 bit Tx GMAC FIFO Restart Pointer */ TX_GMF_RLEV = 0x0d78,/* 32 bit Tx GMAC FIFO Read Level */ + + /* Threshold values for Yukon-EC Ultra and Extreme */ + ECU_AE_THR = 0x0070, /* Almost Empty Threshold */ + ECU_TXFF_LEV = 0x01a0, /* Tx BMU FIFO Level */ + ECU_JUMBO_WM = 0x0080, /* Jumbo Mode Watermark */ }; /* Descriptor Poll Timer Registers */ @@ -1634,6 +1639,9 @@ enum { TX_VLAN_TAG_ON = 1<<25,/* enable VLAN tagging */ TX_VLAN_TAG_OFF = 1<<24,/* disable VLAN tagging */ + TX_JUMBO_ENA = 1<<23,/* PCI Jumbo Mode enable (Yukon-EC Ultra) */ + TX_JUMBO_DIS = 1<<22,/* PCI Jumbo Mode enable (Yukon-EC Ultra) */ + GMF_WSP_TST_ON = 1<<18,/* Write Shadow Pointer Test On */ GMF_WSP_TST_OFF = 1<<17,/* Write Shadow Pointer Test Off */ GMF_WSP_STEP = 1<<16,/* Write Shadow Pointer Step/Increment */ |