Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=bbfb86c5776ff481d246fcd5d8deb67701e05c00
Commit:     bbfb86c5776ff481d246fcd5d8deb67701e05c00
Parent:     c54f5c240239fb8391a3b541f916764dd496f2e6
Author:     Ralf Baechle <[EMAIL PROTECTED]>
AuthorDate: Wed Jul 25 12:31:57 2007 +0100
Committer:  David S. Miller <[EMAIL PROTECTED]>
CommitDate: Wed Oct 10 16:50:20 2007 -0700

    IOC3: Switch hw checksumming to ethtool configurable.
    
    Signed-off-by: Ralf Baechle <[EMAIL PROTECTED]>
    Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
---
 drivers/net/Kconfig    |   20 --------------------
 drivers/net/ioc3-eth.c |   48 ++++++++++++++++++++++++++++++++----------------
 2 files changed, 32 insertions(+), 36 deletions(-)

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 10ed28e..734f840 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -486,26 +486,6 @@ config SGI_IOC3_ETH
          the Ethernet-HOWTO, available from
          <http://www.tldp.org/docs.html#howto>.
 
-config SGI_IOC3_ETH_HW_RX_CSUM
-       bool "Receive hardware checksums"
-       depends on SGI_IOC3_ETH && INET
-       default y
-       help
-         The SGI IOC3 network adapter supports TCP and UDP checksums in
-         hardware to offload processing of these checksums from the CPU.  At
-         the moment only acceleration of IPv4 is supported.  This option
-         enables offloading for checksums on receive.  If unsure, say Y.
-
-config SGI_IOC3_ETH_HW_TX_CSUM
-       bool "Transmit hardware checksums"
-       depends on SGI_IOC3_ETH && INET
-       default y
-       help
-         The SGI IOC3 network adapter supports TCP and UDP checksums in
-         hardware to offload processing of these checksums from the CPU.  At
-         the moment only acceleration of IPv4 is supported.  This option
-         enables offloading for checksums on transmit.  If unsure, say Y.
-
 config MIPS_SIM_NET
        tristate "MIPS simulator Network device"
        depends on MIPS_SIM
diff --git a/drivers/net/ioc3-eth.c b/drivers/net/ioc3-eth.c
index 0834ef0..c030030 100644
--- a/drivers/net/ioc3-eth.c
+++ b/drivers/net/ioc3-eth.c
@@ -5,7 +5,7 @@
  *
  * Driver for SGI's IOC3 based Ethernet cards as found in the PCI card.
  *
- * Copyright (C) 1999, 2000, 2001, 2003 Ralf Baechle
+ * Copyright (C) 1999, 2000, 01, 03, 06 Ralf Baechle
  * Copyright (C) 1995, 1999, 2000, 2001 by Silicon Graphics, Inc.
  *
  * References:
@@ -62,12 +62,7 @@
 #include <asm/pgtable.h>
 #include <asm/uaccess.h>
 #include <asm/sn/types.h>
-#include <asm/sn/sn0/addrs.h>
-#include <asm/sn/sn0/hubni.h>
-#include <asm/sn/sn0/hubio.h>
-#include <asm/sn/klconfig.h>
 #include <asm/sn/ioc3.h>
-#include <asm/sn/sn0/ip27.h>
 #include <asm/pci/bridge.h>
 
 /*
@@ -95,6 +90,9 @@ struct ioc3_private {
        u32 emcr, ehar_h, ehar_l;
        spinlock_t ioc3_lock;
        struct mii_if_info mii;
+       unsigned long flags;
+#define IOC3_FLAG_RX_CHECKSUMS 1
+
        struct pci_dev *pdev;
 
        /* Members used by autonegotiation  */
@@ -521,8 +519,6 @@ static struct net_device_stats *ioc3_get_stats(struct 
net_device *dev)
        return &ip->stats;
 }
 
-#ifdef CONFIG_SGI_IOC3_ETH_HW_RX_CSUM
-
 static void ioc3_tcpudp_checksum(struct sk_buff *skb, uint32_t hwsum, int len)
 {
        struct ethhdr *eh = eth_hdr(skb);
@@ -590,7 +586,6 @@ static void ioc3_tcpudp_checksum(struct sk_buff *skb, 
uint32_t hwsum, int len)
        if (csum == 0xffff)
                skb->ip_summed = CHECKSUM_UNNECESSARY;
 }
-#endif /* CONFIG_SGI_IOC3_ETH_HW_RX_CSUM */
 
 static inline void ioc3_rx(struct ioc3_private *ip)
 {
@@ -625,9 +620,9 @@ static inline void ioc3_rx(struct ioc3_private *ip)
                                goto next;
                        }
 
-#ifdef CONFIG_SGI_IOC3_ETH_HW_RX_CSUM
-                       ioc3_tcpudp_checksum(skb, w0 & ERXBUF_IPCKSUM_MASK,len);
-#endif
+                       if (likely(ip->flags & IOC3_FLAG_RX_CHECKSUMS))
+                               ioc3_tcpudp_checksum(skb,
+                                       w0 & ERXBUF_IPCKSUM_MASK, len);
 
                        netif_rx(skb);
 
@@ -1338,9 +1333,7 @@ static int ioc3_probe(struct pci_dev *pdev, const struct 
pci_device_id *ent)
        dev->set_multicast_list = ioc3_set_multicast_list;
        dev->set_mac_address    = ioc3_set_mac_address;
        dev->ethtool_ops        = &ioc3_ethtool_ops;
-#ifdef CONFIG_SGI_IOC3_ETH_HW_TX_CSUM
        dev->features           = NETIF_F_IP_CSUM;
-#endif
 
        sw_physid1 = ioc3_mdio_read(dev, ip->mii.phy_id, MII_PHYSID1);
        sw_physid2 = ioc3_mdio_read(dev, ip->mii.phy_id, MII_PHYSID2);
@@ -1430,7 +1423,6 @@ static int ioc3_start_xmit(struct sk_buff *skb, struct 
net_device *dev)
        uint32_t w0 = 0;
        int produce;
 
-#ifdef CONFIG_SGI_IOC3_ETH_HW_TX_CSUM
        /*
         * IOC3 has a fairly simple minded checksumming hardware which simply
         * adds up the 1's complement checksum for the entire packet and
@@ -1478,7 +1470,6 @@ static int ioc3_start_xmit(struct sk_buff *skb, struct 
net_device *dev)
 
                w0 = ETXD_DOCHECKSUM | (csoff << ETXD_CHKOFF_SHIFT);
        }
-#endif /* CONFIG_SGI_IOC3_ETH_HW_TX_CSUM */
 
        spin_lock_irq(&ip->ioc3_lock);
 
@@ -1633,12 +1624,37 @@ static u32 ioc3_get_link(struct net_device *dev)
        return rc;
 }
 
+static u32 ioc3_get_rx_csum(struct net_device *dev)
+{
+       struct ioc3_private *ip = netdev_priv(dev);
+
+       return ip->flags & IOC3_FLAG_RX_CHECKSUMS;
+}
+
+static int ioc3_set_rx_csum(struct net_device *dev, u32 data)
+{
+       struct ioc3_private *ip = netdev_priv(dev);
+
+       spin_lock_bh(&ip->ioc3_lock);
+       if (data)
+               ip->flags |= IOC3_FLAG_RX_CHECKSUMS;
+       else
+               ip->flags &= ~IOC3_FLAG_RX_CHECKSUMS;
+       spin_unlock_bh(&ip->ioc3_lock);
+
+       return 0;
+}
+
 static const struct ethtool_ops ioc3_ethtool_ops = {
        .get_drvinfo            = ioc3_get_drvinfo,
        .get_settings           = ioc3_get_settings,
        .set_settings           = ioc3_set_settings,
        .nway_reset             = ioc3_nway_reset,
        .get_link               = ioc3_get_link,
+       .get_rx_csum            = ioc3_get_rx_csum,
+       .set_rx_csum            = ioc3_set_rx_csum,
+       .get_tx_csum            = ethtool_op_get_tx_csum,
+       .set_tx_csum            = ethtool_op_set_tx_csum
 };
 
 static int ioc3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-
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