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| author | Olof Johansson <olof@lixom.net> | 2008-03-05 16:34:16 -0600 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2008-03-05 16:34:39 -0600 |
| commit | 8d636d8bc5ffcdbf49c72aafcda9ddab7ccb2f41 (patch) | |
| tree | 0f441b124752959ba723c87aa471df196f556013 /drivers/net/pasemi_mac.h | |
| parent | dda56df08a28404004bca313d2a1ba1597acd755 (diff) | |
| download | lwn-8d636d8bc5ffcdbf49c72aafcda9ddab7ccb2f41.tar.gz lwn-8d636d8bc5ffcdbf49c72aafcda9ddab7ccb2f41.zip | |
pasemi_mac: jumbo frame support
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>
Diffstat (limited to 'drivers/net/pasemi_mac.h')
| -rw-r--r-- | drivers/net/pasemi_mac.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/net/pasemi_mac.h b/drivers/net/pasemi_mac.h index 99e7b9329a6f..90c51670a1e7 100644 --- a/drivers/net/pasemi_mac.h +++ b/drivers/net/pasemi_mac.h @@ -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; |