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>

1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/net/pasemi_mac.h b/drivers/net/pasemi_mac.h
index 99e7b9329a6..90c51670a1e 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;