lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

pasemi_mac: jumbo frame support

Browse Source 
First cut at jumbo frame support. To support large MTU, one or several
separate channels must be allocated to calculate the TCP/UDP checksum
separately, since the mac lacks enough buffers to hold a whole packet
while it's being calculated.

Furthermore, it seems that a single function channel is not quite
enough to feed one of the 10Gig links, so allocate two channels for
XAUI interfaces.

Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Olof Johansson
2008-03-05 16:34:16 -06:00
parent dda56df08a
commit 8d636d8bc5
3 changed files with 333 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/net/pasemi_mac.h
View File

@@ -27,6 +27,7 @@
#include <linux/phy.h>
#define MAX_LRO_DESCRIPTORS 8
#define MAX_CS 2
struct pasemi_mac_txring {
struct pasemi_dmachan chan; /* Must be first */
@@ -51,6 +52,15 @@ struct pasemi_mac_rxring {
struct pasemi_mac *mac; /* Needed in intr handler */
};
struct pasemi_mac_csring {
struct pasemi_dmachan chan;
unsigned int size;
unsigned int next_to_fill;
int events[2];
int last_event;
int fun;
};
struct pasemi_mac {
struct net_device *netdev;
struct pci_dev *pdev;
@@ -60,10 +70,12 @@ struct pasemi_mac {
struct napi_struct napi;
int bufsz; /* RX ring buffer size */
int last_cs;
int num_cs;
u32 dma_if;
u8 type;
#define MAC_TYPE_GMAC 1
#define MAC_TYPE_XAUI 2
u32 dma_if;
u8 mac_addr[6];
@@ -74,6 +86,7 @@ struct pasemi_mac {
struct pasemi_mac_txring *tx;
struct pasemi_mac_rxring *rx;
struct pasemi_mac_csring *cs[MAX_CS];
char tx_irq_name[10]; /* "eth%d tx" */
char rx_irq_name[10]; /* "eth%d rx" */
int link;