/* sunvnet.c: Sun LDOM Virtual Network Driver.
*
* Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/etherdevice.h>
#include <linux/mutex.h>
#include <linux/if_vlan.h>
#if IS_ENABLED(CONFIG_IPV6)
#include <linux/icmpv6.h>
#endif
#include <net/icmp.h>
#include <net/route.h>
#include <asm/vio.h>
#include <asm/ldc.h>
#include "sunvnet.h"
#define DRV_MODULE_NAME "sunvnet"
#define DRV_MODULE_VERSION "1.0"
#define DRV_MODULE_RELDATE "June 25, 2007"
static char version[] =
DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
MODULE_DESCRIPTION("Sun LDOM virtual network driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_MODULE_VERSION);
/* Heuristic for the number of times to exponentially backoff and
* retry sending an LDC trigger when EAGAIN is encountered
*/
#define VNET_MAX_RETRIES 10
static int __vnet_tx_trigger(struct vnet_port *port, u32 start);
/* Ordered from largest major to lowest */
static struct vio_version vnet_versions[] = {
{ .major = 1, .minor = 6 },
{ .major = 1, .minor = 0 },
};
static inline u32 vnet_tx_dring_avail(struct vio_dring_state *dr)
{
return vio_dring_avail(dr, VNET_TX_RING_SIZE);
}
static int vnet_handle_unknown(struct vnet_port *port, void *arg)
{
struct vio_msg_tag *pkt = arg;
pr_err("Received unknown msg [%02x:%02x:%04x:%08x]\n",
pkt->type, pkt->stype, pkt->stype_env, pkt->sid);
pr_err("Resetting connection\n");
ldc_disconnect(port->vio.lp);
return -ECONNRESET;
}
static int vnet_send_attr(struct vio_driver_state *vio)
{
struct vnet_port *port = to_vnet_port(vio);
struct net_device *dev = port->vp->dev;
struct vio_net_attr_info pkt;
int framelen = ETH_FRAME_LEN;
int i;
memset(&pkt, 0, sizeof(pkt));
pkt.tag.type = VIO_TYPE_CTRL;
pkt.tag.stype = VIO_SUBTYPE_INFO;
pkt.tag.stype_env = VIO_ATTR_INFO;
pkt.tag.sid = vio_send_sid(vio);
if (vio_version_before(vio, 1, 2))
pkt.xfer_mode = VIO_DRING_MODE;
else
pkt.xfer_mode = VIO_NEW_DRING_MODE;
pkt.addr_type = VNET_ADDR_ETHERMAC;
pkt.ack_freq = 0;
for (i = 0; i < 6; i++)
pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8);
if (vio_version_after(vio, 1, 3)) {
if (port->rmtu) {
port->rmtu = min(VNET_MAXPACKET, port->rmtu);
pkt.mtu = port->rmtu;
} else {
port->rmtu = VNET_MAXPACKET;
pkt.mtu = port->rmtu;
}
if (vio_version_after_eq(vio, 1, 6))
pkt.options = VIO_TX_DRING;
} else if (vio_version_before(vio, 1, 3)) {
pkt.mtu = framelen;
} else { /* v1.3 */
pkt.mtu = framelen + VLAN_HLEN;
}
pkt.plnk_updt = PHYSLINK_UPDATE_NONE;
pkt.cflags = 0;
viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] "
"ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] "
"cflags[0x%04x] lso_max[%u]\n",
pkt.xfer_mode, pkt.addr_type,
(unsigned long long)pkt.addr,
pkt.
| 