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>
diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index 9ca4a2c..5efb5af 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -741,6 +741,11 @@
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 @@
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 */