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authorStephen Hemminger <shemminger@osdl.org>2006-09-26 11:57:43 -0700
committerJeff Garzik <jeff@garzik.org>2006-09-27 17:56:31 -0400
commit14d0263fea0613d4f83dc5e3ad4631f363d1689f (patch)
treeb8c9976416cb1c031f10de3ba4107b251f3b7850 /drivers/net/sky2.h
parent2bb8c26242c2393b097a993ffe9b003ec9b85395 (diff)
downloadop-kernel-dev-14d0263fea0613d4f83dc5e3ad4631f363d1689f.zip
op-kernel-dev-14d0263fea0613d4f83dc5e3ad4631f363d1689f.tar.gz
[PATCH] sky2: fragmented receive for large MTU
Use hardware support for chained receive to break up large frames into multiple pages. This avoids having to do a mult-page allocation that can fail on a busy system due to fragmented memory. For normal size MTU, this code behaves the same. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/sky2.h')
-rw-r--r--drivers/net/sky2.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/net/sky2.h b/drivers/net/sky2.h
index 403486a..f66109a 100644
--- a/drivers/net/sky2.h
+++ b/drivers/net/sky2.h
@@ -4,6 +4,8 @@
#ifndef _SKY2_H
#define _SKY2_H
+#define ETH_JUMBO_MTU 9000 /* Maximum MTU supported */
+
/* PCI device specific config registers */
enum {
PCI_DEV_REG1 = 0x40,
@@ -1779,7 +1781,9 @@ struct tx_ring_info {
struct rx_ring_info {
struct sk_buff *skb;
- dma_addr_t mapaddr;
+ dma_addr_t data_addr;
+ DECLARE_PCI_UNMAP_ADDR(data_size);
+ dma_addr_t frag_addr[ETH_JUMBO_MTU >> PAGE_SHIFT];
};
struct sky2_port {
@@ -1804,7 +1808,9 @@ struct sky2_port {
u16 rx_next; /* next re to check */
u16 rx_put; /* next le index to use */
u16 rx_pending;
- u16 rx_bufsize;
+ u16 rx_data_size;
+ u16 rx_nfrags;
+
#ifdef SKY2_VLAN_TAG_USED
u16 rx_tag;
struct vlan_group *vlgrp;
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