The patch titled
Subject: rapidio/rionet: add capability to change MTU
has been added to the -mm tree. Its filename is
rapidio-rionet-add-capability-to-change-mtu.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/rapidio-rionet-add-capability-to-change-mtu.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/rapidio-rionet-add-capability-to-change-mtu.patch
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------------------------------------------------------
From: Aurelien Jacquiot <a-jacquiot@xxxxxx>
Subject: rapidio/rionet: add capability to change MTU
These patches are the result of extensive collaboration within the
RapidIO.org Software Task Group between Texas Instruments, Freescale,
Prodrive Technologies, Nokia Networks, BAE and IDT. Additional input was
received from other members of RapidIO.org. The objective was to create a
character mode driver interface which exposes the capabilities of RapidIO
devices directly to applications, in a manner that allows the numerous and
varied RapidIO implementations to interoperate.
The Software Task Group has also developed fabric management, Remote
Memory Access, and sockets applications which make use of these interfaces
in user space. Intensive testing with these applications prompted the
RapidIO subsystem updates provided within this set of patches.
This patch (of 29):
Replace default Ethernet-specific routine by the custom one to allow
setting of larger MTU supported by RapidIO messaging (max RIO packet size
is 4096 bytes).
Signed-off-by: Aurelien Jacquiot <a-jacquiot@xxxxxx>
Signed-off-by: Alexandre Bounine <alexandre.bounine@xxxxxxx>
Cc: Matt Porter <mporter@xxxxxxxxxxxxxxxxxxx>
Cc: Andre van Herk <andre.van.herk@xxxxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/net/rionet.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff -puN drivers/net/rionet.c~rapidio-rionet-add-capability-to-change-mtu drivers/net/rionet.c
--- a/drivers/net/rionet.c~rapidio-rionet-add-capability-to-change-mtu
+++ a/drivers/net/rionet.c
@@ -48,6 +48,8 @@ MODULE_LICENSE("GPL");
#define RIONET_TX_RING_SIZE CONFIG_RIONET_TX_SIZE
#define RIONET_RX_RING_SIZE CONFIG_RIONET_RX_SIZE
#define RIONET_MAX_NETS 8
+#define RIONET_MSG_SIZE RIO_MAX_MSG_SIZE
+#define RIONET_MAX_MTU (RIONET_MSG_SIZE - ETH_HLEN)
struct rionet_private {
struct rio_mport *mport;
@@ -443,6 +445,17 @@ static void rionet_set_msglevel(struct n
rnet->msg_enable = value;
}
+static int rionet_change_mtu(struct net_device *ndev, int new_mtu)
+{
+ if ((new_mtu < 68) || (new_mtu > RIONET_MAX_MTU)) {
+ printk(KERN_ERR "%s: Invalid MTU size %d\n",
+ ndev->name, new_mtu);
+ return -EINVAL;
+ }
+ ndev->mtu = new_mtu;
+ return 0;
+}
+
static const struct ethtool_ops rionet_ethtool_ops = {
.get_drvinfo = rionet_get_drvinfo,
.get_msglevel = rionet_get_msglevel,
@@ -454,7 +467,7 @@ static const struct net_device_ops rione
.ndo_open = rionet_open,
.ndo_stop = rionet_close,
.ndo_start_xmit = rionet_start_xmit,
- .ndo_change_mtu = eth_change_mtu,
+ .ndo_change_mtu = rionet_change_mtu,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
};
@@ -489,7 +502,7 @@ static int rionet_setup_netdev(struct ri
ndev->dev_addr[5] = device_id & 0xff;
ndev->netdev_ops = &rionet_netdev_ops;
- ndev->mtu = RIO_MAX_MSG_SIZE - 14;
+ ndev->mtu = RIONET_MAX_MTU;
ndev->features = NETIF_F_LLTX;
SET_NETDEV_DEV(ndev, &mport->dev);
ndev->ethtool_ops = &rionet_ethtool_ops;
_
Patches currently in -mm which might be from a-jacquiot@xxxxxx are
rapidio-rionet-fix-deadlock-on-smp.patch
rapidio-rionet-add-capability-to-change-mtu.patch
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