[deliverable/linux.git] / drivers / net / ethernet / sun / sunvnet.c

/* sunvnet.c: Sun LDOM Virtual Network Driver.
 *
 * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
 * Copyright (C) 2016 Oracle. All rights reserved.
 */

#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/highmem.h>
#include <linux/if_vlan.h>

#if IS_ENABLED(CONFIG_IPV6)
#include <linux/icmpv6.h>
#endif

#include <net/ip.h>
#include <net/icmp.h>
#include <net/route.h>

#include <asm/vio.h>
#include <asm/ldc.h>

#include "sunvnet_common.h"

/* length of time before we decide the hardware is borked,
 * and dev->tx_timeout() should be called to fix the problem
 */
#define VNET_TX_TIMEOUT			(5 * HZ)

#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);

/* Ordered from largest major to lowest */
static struct vio_version vnet_versions[] = {
	{ .major = 1, .minor = 8 },
	{ .major = 1, .minor = 7 },
	{ .major = 1, .minor = 6 },
	{ .major = 1, .minor = 0 },
};

static void vnet_get_drvinfo(struct net_device *dev,
			     struct ethtool_drvinfo *info)
{
	strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
	strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
}

static u32 vnet_get_msglevel(struct net_device *dev)
{
	struct vnet *vp = netdev_priv(dev);

	return vp->msg_enable;
}

static void vnet_set_msglevel(struct net_device *dev, u32 value)
{
	struct vnet *vp = netdev_priv(dev);

	vp->msg_enable = value;
}

static const struct ethtool_ops vnet_ethtool_ops = {
	.get_drvinfo		= vnet_get_drvinfo,
	.get_msglevel		= vnet_get_msglevel,
	.set_msglevel		= vnet_set_msglevel,
	.get_link		= ethtool_op_get_link,
};

static LIST_HEAD(vnet_list);
static DEFINE_MUTEX(vnet_list_mutex);

static struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
{
	unsigned int hash = vnet_hashfn(skb->data);
	struct hlist_head *hp = &vp->port_hash[hash];
	struct vnet_port *port;

	hlist_for_each_entry_rcu(port, hp, hash) {
		if (!sunvnet_port_is_up_common(port))
			continue;
		if (ether_addr_equal(port->raddr, skb->data))
			return port;
	}
	list_for_each_entry_rcu(port, &vp->port_list, list) {
		if (!port->switch_port)
			continue;
		if (!sunvnet_port_is_up_common(port))
			continue;
		return port;
	}
	return NULL;
}

/* func arg to vnet_start_xmit_common() to get the proper tx port */
static struct vnet_port *vnet_tx_port_find(struct sk_buff *skb,
					   struct net_device *dev)
{
	struct vnet *vp = netdev_priv(dev);

	return __tx_port_find(vp, skb);
}

static u16 vnet_select_queue(struct net_device *dev, struct sk_buff *skb,
			     void *accel_priv, select_queue_fallback_t fallback)
{
	struct vnet *vp = netdev_priv(dev);
	struct vnet_port *port = __tx_port_find(vp, skb);

	if (!port)
		return 0;

	return port->q_index;
}

/* Wrappers to common functions */
static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	return sunvnet_start_xmit_common(skb, dev, vnet_tx_port_find);
}

static void vnet_set_rx_mode(struct net_device *dev)
{
	struct vnet *vp = netdev_priv(dev);

	return sunvnet_set_rx_mode_common(dev, vp);
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void vnet_poll_controller(struct net_device *dev)
{
	struct vnet *vp = netdev_priv(dev);

	return sunvnet_poll_controller_common(dev, vp);
}
#endif

static const struct net_device_ops vnet_ops = {
	.ndo_open		= sunvnet_open_common,
	.ndo_stop		= sunvnet_close_common,
	.ndo_set_rx_mode	= vnet_set_rx_mode,
	.ndo_set_mac_address	= sunvnet_set_mac_addr_common,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_tx_timeout		= sunvnet_tx_timeout_common,
	.ndo_change_mtu		= sunvnet_change_mtu_common,
	.ndo_start_xmit		= vnet_start_xmit,
	.ndo_select_queue	= vnet_select_queue,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= vnet_poll_controller,
#endif
};

static struct vnet *vnet_new(const u64 *local_mac,
			     struct vio_dev *vdev)
{
	struct net_device *dev;
	struct vnet *vp;
	int err, i;

	dev = alloc_etherdev_mqs(sizeof(*vp), VNET_MAX_TXQS, 1);
	if (!dev)
		return ERR_PTR(-ENOMEM);
	dev->needed_headroom = VNET_PACKET_SKIP + 8;
	dev->needed_tailroom = 8;

	for (i = 0; i < ETH_ALEN; i++)
		dev->dev_addr[i] = (*local_mac >> (5 - i) * 8) & 0xff;

	vp = netdev_priv(dev);

	spin_lock_init(&vp->lock);
	vp->dev = dev;

	INIT_LIST_HEAD(&vp->port_list);
	for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
		INIT_HLIST_HEAD(&vp->port_hash[i]);
	INIT_LIST_HEAD(&vp->list);
	vp->local_mac = *local_mac;

	dev->netdev_ops = &vnet_ops;
	dev->ethtool_ops = &vnet_ethtool_ops;
	dev->watchdog_timeo = VNET_TX_TIMEOUT;

	dev->hw_features = NETIF_F_TSO | NETIF_F_GSO | NETIF_F_GSO_SOFTWARE |
			   NETIF_F_HW_CSUM | NETIF_F_SG;
	dev->features = dev->hw_features;

	SET_NETDEV_DEV(dev, &vdev->dev);

	err = register_netdev(dev);
	if (err) {
		pr_err("Cannot register net device, aborting\n");
		goto err_out_free_dev;
	}

	netdev_info(dev, "Sun LDOM vnet %pM\n", dev->dev_addr);

	list_add(&vp->list, &vnet_list);

	return vp;

err_out_free_dev:
	free_netdev(dev);

	return ERR_PTR(err);
}

static struct vnet *vnet_find_or_create(const u64 *local_mac,
					struct vio_dev *vdev)
{
	struct vnet *iter, *vp;

	mutex_lock(&vnet_list_mutex);
	vp = NULL;
	list_for_each_entry(iter, &vnet_list, list) {
		if (iter->local_mac == *local_mac) {
			vp = iter;
			break;
		}
	}
	if (!vp)
		vp = vnet_new(local_mac, vdev);
	mutex_unlock(&vnet_list_mutex);

	return vp;
}

static void vnet_cleanup(void)
{
	struct vnet *vp;
	struct net_device *dev;

	mutex_lock(&vnet_list_mutex);
	while (!list_empty(&vnet_list)) {
		vp = list_first_entry(&vnet_list, struct vnet, list);
		list_del(&vp->list);
		dev = vp->dev;
		/* vio_unregister_driver() should have cleaned up port_list */
		BUG_ON(!list_empty(&vp->port_list));
		unregister_netdev(dev);
		free_netdev(dev);
	}
	mutex_unlock(&vnet_list_mutex);
}

static const char *local_mac_prop = "local-mac-address";

static struct vnet *vnet_find_parent(struct mdesc_handle *hp,
				     u64 port_node,
				     struct vio_dev *vdev)
{
	const u64 *local_mac = NULL;
	u64 a;

	mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
		u64 target = mdesc_arc_target(hp, a);
		const char *name;

		name = mdesc_get_property(hp, target, "name", NULL);
		if (!name || strcmp(name, "network"))
			continue;

		local_mac = mdesc_get_property(hp, target,
					       local_mac_prop, NULL);
		if (local_mac)
			break;
	}
	if (!local_mac)
		return ERR_PTR(-ENODEV);

	return vnet_find_or_create(local_mac, vdev);
}

static struct ldc_channel_config vnet_ldc_cfg = {
	.event		= sunvnet_event_common,
	.mtu		= 64,
	.mode		= LDC_MODE_UNRELIABLE,
};

static struct vio_driver_ops vnet_vio_ops = {
	.send_attr		= sunvnet_send_attr_common,
	.handle_attr		= sunvnet_handle_attr_common,
	.handshake_complete	= sunvnet_handshake_complete_common,
};

static void print_version(void)
{
	printk_once(KERN_INFO "%s", version);
}

const char *remote_macaddr_prop = "remote-mac-address";

static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
{
	struct mdesc_handle *hp;
	struct vnet_port *port;
	unsigned long flags;
	struct vnet *vp;
	const u64 *rmac;
	int len, i, err, switch_port;

	print_version();

	hp = mdesc_grab();

	vp = vnet_find_parent(hp, vdev->mp, vdev);
	if (IS_ERR(vp)) {
		pr_err("Cannot find port parent vnet\n");
		err = PTR_ERR(vp);
		goto err_out_put_mdesc;
	}

	rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
	err = -ENODEV;
	if (!rmac) {
		pr_err("Port lacks %s property\n", remote_macaddr_prop);
		goto err_out_put_mdesc;
	}

	port = kzalloc(sizeof(*port), GFP_KERNEL);
	err = -ENOMEM;
	if (!port)
		goto err_out_put_mdesc;

	for (i = 0; i < ETH_ALEN; i++)
		port->raddr[i] = (*rmac >> (5 - i) * 8) & 0xff;

	port->vp = vp;

	err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
			      vnet_versions, ARRAY_SIZE(vnet_versions),
			      &vnet_vio_ops, vp->dev->name);
	if (err)
		goto err_out_free_port;

	err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port);
	if (err)
		goto err_out_free_port;

	netif_napi_add(port->vp->dev, &port->napi, sunvnet_poll_common,
		       NAPI_POLL_WEIGHT);

	INIT_HLIST_NODE(&port->hash);
	INIT_LIST_HEAD(&port->list);

	switch_port = 0;
	if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL))
		switch_port = 1;
	port->switch_port = switch_port;
	port->tso = true;
	port->tsolen = 0;

	spin_lock_irqsave(&vp->lock, flags);
	if (switch_port)
		list_add_rcu(&port->list, &vp->port_list);
	else
		list_add_tail_rcu(&port->list, &vp->port_list);
	hlist_add_head_rcu(&port->hash,
			   &vp->port_hash[vnet_hashfn(port->raddr)]);
	sunvnet_port_add_txq_common(port);
	spin_unlock_irqrestore(&vp->lock, flags);

	dev_set_drvdata(&vdev->dev, port);

	pr_info("%s: PORT ( remote-mac %pM%s )\n",
		vp->dev->name, port->raddr, switch_port ? " switch-port" : "");

	setup_timer(&port->clean_timer, sunvnet_clean_timer_expire_common,
		    (unsigned long)port);

	napi_enable(&port->napi);
	vio_port_up(&port->vio);

	mdesc_release(hp);

	return 0;

err_out_free_port:
	kfree(port);

err_out_put_mdesc:
	mdesc_release(hp);
	return err;
}

static int vnet_port_remove(struct vio_dev *vdev)
{
	struct vnet_port *port = dev_get_drvdata(&vdev->dev);

	if (port) {
		del_timer_sync(&port->vio.timer);

		napi_disable(&port->napi);

		list_del_rcu(&port->list);
		hlist_del_rcu(&port->hash);

		synchronize_rcu();
		del_timer_sync(&port->clean_timer);
		sunvnet_port_rm_txq_common(port);
		netif_napi_del(&port->napi);
		sunvnet_port_free_tx_bufs_common(port);
		vio_ldc_free(&port->vio);

		dev_set_drvdata(&vdev->dev, NULL);

		kfree(port);
	}
	return 0;
}

static const struct vio_device_id vnet_port_match[] = {
	{
		.type = "vnet-port",
	},
	{},
};
MODULE_DEVICE_TABLE(vio, vnet_port_match);

static struct vio_driver vnet_port_driver = {
	.id_table	= vnet_port_match,
	.probe		= vnet_port_probe,
	.remove		= vnet_port_remove,
	.name		= "vnet_port",
};

static int __init vnet_init(void)
{
	return vio_register_driver(&vnet_port_driver);
}

static void __exit vnet_exit(void)
{
	vio_unregister_driver(&vnet_port_driver);
	vnet_cleanup();
}

module_init(vnet_init);
module_exit(vnet_exit);
Commit	Line	Data
4c521e42 DM	1	/* sunvnet.c: Sun LDOM Virtual Network Driver.
4c521e42 DM	2	*
3d452e55	3	* Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
67d0719f	4	* Copyright (C) 2016 Oracle. All rights reserved.
4c521e42 DM	5	*/
4c521e42 DM	6
4d5870ec JP	7	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
4d5870ec JP	8
4c521e42 DM	9	#include <linux/module.h>
	10	#include <linux/kernel.h>
	11	#include <linux/types.h>
	12	#include <linux/slab.h>
	13	#include <linux/delay.h>
	14	#include <linux/init.h>
	15	#include <linux/netdevice.h>
	16	#include <linux/ethtool.h>
	17	#include <linux/etherdevice.h>
9184a046	18	#include <linux/mutex.h>
da38c564	19	#include <linux/highmem.h>
e4defc77	20	#include <linux/if_vlan.h>
4c521e42	21
a2b78e9b DS	22	#if IS_ENABLED(CONFIG_IPV6)
	23	#include <linux/icmpv6.h>
	24	#endif
	25
6d0ba919	26	#include <net/ip.h>
a2b78e9b DS	27	#include <net/icmp.h>
	28	#include <net/route.h>
	29
4c521e42 DM	30	#include <asm/vio.h>
	31	#include <asm/ldc.h>
	32
31762eaa AY	33	#include "sunvnet_common.h"
	34
	35	/* length of time before we decide the hardware is borked,
	36	* and dev->tx_timeout() should be called to fix the problem
	37	*/
	38	#define VNET_TX_TIMEOUT (5 * HZ)
4c521e42 DM	39
4c521e42 DM	40	#define DRV_MODULE_NAME "sunvnet"
4c521e42 DM	41	#define DRV_MODULE_VERSION "1.0"
	42	#define DRV_MODULE_RELDATE "June 25, 2007"
	43
f73d12bd	44	static char version[] =
4c521e42 DM	45	DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
	46	MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
	47	MODULE_DESCRIPTION("Sun LDOM virtual network driver");
	48	MODULE_LICENSE("GPL");
	49	MODULE_VERSION(DRV_MODULE_VERSION);
	50
	51	/* Ordered from largest major to lowest */
	52	static struct vio_version vnet_versions[] = {
6d0ba919 DS	53	{ .major = 1, .minor = 8 },
6d0ba919 DS	54	{ .major = 1, .minor = 7 },
e4defc77	55	{ .major = 1, .minor = 6 },
4c521e42 DM	56	{ .major = 1, .minor = 0 },
	57	};
	58
4c521e42 DM	59	static void vnet_get_drvinfo(struct net_device *dev,
	60	struct ethtool_drvinfo *info)
	61	{
7826d43f JP	62	strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
7826d43f JP	63	strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
4c521e42 DM	64	}
	65
	66	static u32 vnet_get_msglevel(struct net_device *dev)
	67	{
	68	struct vnet *vp = netdev_priv(dev);
dc153f85	69
4c521e42 DM	70	return vp->msg_enable;
	71	}
	72
	73	static void vnet_set_msglevel(struct net_device *dev, u32 value)
	74	{
	75	struct vnet *vp = netdev_priv(dev);
dc153f85	76
4c521e42 DM	77	vp->msg_enable = value;
	78	}
	79
	80	static const struct ethtool_ops vnet_ethtool_ops = {
	81	.get_drvinfo = vnet_get_drvinfo,
	82	.get_msglevel = vnet_get_msglevel,
	83	.set_msglevel = vnet_set_msglevel,
	84	.get_link = ethtool_op_get_link,
4c521e42 DM	85	};
4c521e42 DM	86
9184a046 DM	87	static LIST_HEAD(vnet_list);
	88	static DEFINE_MUTEX(vnet_list_mutex);
	89
67d0719f AY	90	static struct vnet_port __tx_port_find(struct vnet vp, struct sk_buff *skb)
	91	{
	92	unsigned int hash = vnet_hashfn(skb->data);
	93	struct hlist_head *hp = &vp->port_hash[hash];
	94	struct vnet_port *port;
	95
	96	hlist_for_each_entry_rcu(port, hp, hash) {
	97	if (!sunvnet_port_is_up_common(port))
	98	continue;
	99	if (ether_addr_equal(port->raddr, skb->data))
	100	return port;
	101	}
	102	list_for_each_entry_rcu(port, &vp->port_list, list) {
	103	if (!port->switch_port)
	104	continue;
	105	if (!sunvnet_port_is_up_common(port))
	106	continue;
	107	return port;
	108	}
	109	return NULL;
	110	}
	111
	112	/* func arg to vnet_start_xmit_common() to get the proper tx port */
	113	static struct vnet_port vnet_tx_port_find(struct sk_buff skb,
	114	struct net_device *dev)
	115	{
	116	struct vnet *vp = netdev_priv(dev);
	117
	118	return __tx_port_find(vp, skb);
	119	}
	120
	121	static u16 vnet_select_queue(struct net_device dev, struct sk_buff skb,
	122	void *accel_priv, select_queue_fallback_t fallback)
	123	{
	124	struct vnet *vp = netdev_priv(dev);
	125	struct vnet_port *port = __tx_port_find(vp, skb);
	126
	127	if (!port)
	128	return 0;
	129
	130	return port->q_index;
	131	}
	132
	133	/* Wrappers to common functions */
	134	static int vnet_start_xmit(struct sk_buff skb, struct net_device dev)
	135	{
	136	return sunvnet_start_xmit_common(skb, dev, vnet_tx_port_find);
	137	}
	138
	139	static void vnet_set_rx_mode(struct net_device *dev)
	140	{
	141	struct vnet *vp = netdev_priv(dev);
	142
	143	return sunvnet_set_rx_mode_common(dev, vp);
	144	}
	145
	146	#ifdef CONFIG_NET_POLL_CONTROLLER
	147	static void vnet_poll_controller(struct net_device *dev)
	148	{
	149	struct vnet *vp = netdev_priv(dev);
	150
	151	return sunvnet_poll_controller_common(dev, vp);
	152	}
	153	#endif
154
8fd17f2e	155	static const struct net_device_ops vnet_ops = {
31762eaa AY	156	.ndo_open = sunvnet_open_common,
31762eaa AY	157	.ndo_stop = sunvnet_close_common,
67d0719f	158	.ndo_set_rx_mode = vnet_set_rx_mode,
31762eaa	159	.ndo_set_mac_address = sunvnet_set_mac_addr_common,
240c102d	160	.ndo_validate_addr = eth_validate_addr,
31762eaa AY	161	.ndo_tx_timeout = sunvnet_tx_timeout_common,
31762eaa AY	162	.ndo_change_mtu = sunvnet_change_mtu_common,
67d0719f AY	163	.ndo_start_xmit = vnet_start_xmit,
67d0719f AY	164	.ndo_select_queue = vnet_select_queue,
69088822	165	#ifdef CONFIG_NET_POLL_CONTROLLER
67d0719f	166	.ndo_poll_controller = vnet_poll_controller,
69088822	167	#endif
8fd17f2e DM	168	};
8fd17f2e DM	169
4c5d283a SV	170	static struct vnet vnet_new(const u64 local_mac,
4c5d283a SV	171	struct vio_dev *vdev)
9184a046 DM	172	{
	173	struct net_device *dev;
	174	struct vnet *vp;
	175	int err, i;
	176
d51bffd1	177	dev = alloc_etherdev_mqs(sizeof(*vp), VNET_MAX_TXQS, 1);
41de8d4c	178	if (!dev)
9184a046	179	return ERR_PTR(-ENOMEM);
8e845f4c DS	180	dev->needed_headroom = VNET_PACKET_SKIP + 8;
8e845f4c DS	181	dev->needed_tailroom = 8;
9184a046 DM	182
	183	for (i = 0; i < ETH_ALEN; i++)
	184	dev->dev_addr[i] = (local_mac >> (5 - i) 8) & 0xff;
	185
9184a046 DM	186	vp = netdev_priv(dev);
	187
	188	spin_lock_init(&vp->lock);
	189	vp->dev = dev;
	190
	191	INIT_LIST_HEAD(&vp->port_list);
	192	for (i = 0; i < VNET_PORT_HASH_SIZE; i++)
	193	INIT_HLIST_HEAD(&vp->port_hash[i]);
	194	INIT_LIST_HEAD(&vp->list);
	195	vp->local_mac = *local_mac;
	196
8fd17f2e	197	dev->netdev_ops = &vnet_ops;
9184a046 DM	198	dev->ethtool_ops = &vnet_ethtool_ops;
9184a046 DM	199	dev->watchdog_timeo = VNET_TX_TIMEOUT;
9184a046	200
368e36ed	201	dev->hw_features = NETIF_F_TSO \| NETIF_F_GSO \| NETIF_F_GSO_SOFTWARE \|
9a72dd4d	202	NETIF_F_HW_CSUM \| NETIF_F_SG;
da38c564 DS	203	dev->features = dev->hw_features;
da38c564 DS	204
4c5d283a SV	205	SET_NETDEV_DEV(dev, &vdev->dev);
4c5d283a SV	206
9184a046 DM	207	err = register_netdev(dev);
9184a046 DM	208	if (err) {
4d5870ec	209	pr_err("Cannot register net device, aborting\n");
9184a046 DM	210	goto err_out_free_dev;
	211	}
	212
4d5870ec	213	netdev_info(dev, "Sun LDOM vnet %pM\n", dev->dev_addr);
9184a046 DM	214
	215	list_add(&vp->list, &vnet_list);
	216
	217	return vp;
	218
	219	err_out_free_dev:
	220	free_netdev(dev);
	221
	222	return ERR_PTR(err);
	223	}
	224
4c5d283a SV	225	static struct vnet vnet_find_or_create(const u64 local_mac,
4c5d283a SV	226	struct vio_dev *vdev)
9184a046 DM	227	{
	228	struct vnet iter, vp;
	229
	230	mutex_lock(&vnet_list_mutex);
	231	vp = NULL;
	232	list_for_each_entry(iter, &vnet_list, list) {
	233	if (iter->local_mac == *local_mac) {
	234	vp = iter;
	235	break;
	236	}
	237	}
	238	if (!vp)
4c5d283a	239	vp = vnet_new(local_mac, vdev);
9184a046 DM	240	mutex_unlock(&vnet_list_mutex);
	241
	242	return vp;
	243	}
	244
a4b70a07 SV	245	static void vnet_cleanup(void)
	246	{
	247	struct vnet *vp;
	248	struct net_device *dev;
	249
	250	mutex_lock(&vnet_list_mutex);
	251	while (!list_empty(&vnet_list)) {
	252	vp = list_first_entry(&vnet_list, struct vnet, list);
	253	list_del(&vp->list);
	254	dev = vp->dev;
	255	/* vio_unregister_driver() should have cleaned up port_list */
	256	BUG_ON(!list_empty(&vp->port_list));
	257	unregister_netdev(dev);
	258	free_netdev(dev);
	259	}
	260	mutex_unlock(&vnet_list_mutex);
	261	}
	262
9184a046 DM	263	static const char *local_mac_prop = "local-mac-address";
9184a046 DM	264
f73d12bd	265	static struct vnet vnet_find_parent(struct mdesc_handle hp,
4c5d283a SV	266	u64 port_node,
4c5d283a SV	267	struct vio_dev *vdev)
9184a046 DM	268	{
	269	const u64 *local_mac = NULL;
	270	u64 a;
	271
	272	mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
	273	u64 target = mdesc_arc_target(hp, a);
	274	const char *name;
	275
	276	name = mdesc_get_property(hp, target, "name", NULL);
	277	if (!name \|\| strcmp(name, "network"))
	278	continue;
	279
	280	local_mac = mdesc_get_property(hp, target,
	281	local_mac_prop, NULL);
	282	if (local_mac)
	283	break;
	284	}
	285	if (!local_mac)
	286	return ERR_PTR(-ENODEV);
	287
4c5d283a	288	return vnet_find_or_create(local_mac, vdev);
9184a046 DM	289	}
9184a046 DM	290
4c521e42	291	static struct ldc_channel_config vnet_ldc_cfg = {
31762eaa	292	.event = sunvnet_event_common,
4c521e42 DM	293	.mtu = 64,
	294	.mode = LDC_MODE_UNRELIABLE,
	295	};
	296
	297	static struct vio_driver_ops vnet_vio_ops = {
31762eaa AY	298	.send_attr = sunvnet_send_attr_common,
	299	.handle_attr = sunvnet_handle_attr_common,
	300	.handshake_complete = sunvnet_handshake_complete_common,
4c521e42 DM	301	};
4c521e42 DM	302
f73d12bd	303	static void print_version(void)
9184a046	304	{
4d5870ec	305	printk_once(KERN_INFO "%s", version);
9184a046 DM	306	}
9184a046 DM	307
4c521e42 DM	308	const char *remote_macaddr_prop = "remote-mac-address";
4c521e42 DM	309
1dd06ae8	310	static int vnet_port_probe(struct vio_dev vdev, const struct vio_device_id id)
4c521e42	311	{
43fdf274	312	struct mdesc_handle *hp;
4c521e42 DM	313	struct vnet_port *port;
	314	unsigned long flags;
	315	struct vnet *vp;
	316	const u64 *rmac;
	317	int len, i, err, switch_port;
	318
9184a046	319	print_version();
4c521e42	320
43fdf274 DM	321	hp = mdesc_grab();
43fdf274 DM	322
4c5d283a	323	vp = vnet_find_parent(hp, vdev->mp, vdev);
9184a046	324	if (IS_ERR(vp)) {
4d5870ec	325	pr_err("Cannot find port parent vnet\n");
9184a046 DM	326	err = PTR_ERR(vp);
	327	goto err_out_put_mdesc;
	328	}
	329
43fdf274 DM	330	rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
43fdf274 DM	331	err = -ENODEV;
4c521e42	332	if (!rmac) {
4d5870ec	333	pr_err("Port lacks %s property\n", remote_macaddr_prop);
43fdf274	334	goto err_out_put_mdesc;
4c521e42 DM	335	}
	336
	337	port = kzalloc(sizeof(*port), GFP_KERNEL);
43fdf274	338	err = -ENOMEM;
e404decb	339	if (!port)
43fdf274	340	goto err_out_put_mdesc;
4c521e42 DM	341
	342	for (i = 0; i < ETH_ALEN; i++)
	343	port->raddr[i] = (rmac >> (5 - i) 8) & 0xff;
	344
	345	port->vp = vp;
	346
43fdf274	347	err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
4c521e42 DM	348	vnet_versions, ARRAY_SIZE(vnet_versions),
	349	&vnet_vio_ops, vp->dev->name);
	350	if (err)
	351	goto err_out_free_port;
	352
	353	err = vio_ldc_alloc(&port->vio, &vnet_ldc_cfg, port);
	354	if (err)
	355	goto err_out_free_port;
	356
31762eaa AY	357	netif_napi_add(port->vp->dev, &port->napi, sunvnet_poll_common,
31762eaa AY	358	NAPI_POLL_WEIGHT);
69088822	359
4c521e42 DM	360	INIT_HLIST_NODE(&port->hash);
	361	INIT_LIST_HEAD(&port->list);
	362
	363	switch_port = 0;
dc153f85	364	if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL))
4c521e42	365	switch_port = 1;
028ebff2	366	port->switch_port = switch_port;
368e36ed DS	367	port->tso = true;
368e36ed DS	368	port->tsolen = 0;
4c521e42 DM	369
	370	spin_lock_irqsave(&vp->lock, flags);
	371	if (switch_port)
2a968dd8	372	list_add_rcu(&port->list, &vp->port_list);
4c521e42	373	else
2a968dd8 SV	374	list_add_tail_rcu(&port->list, &vp->port_list);
	375	hlist_add_head_rcu(&port->hash,
	376	&vp->port_hash[vnet_hashfn(port->raddr)]);
31762eaa	377	sunvnet_port_add_txq_common(port);
4c521e42 DM	378	spin_unlock_irqrestore(&vp->lock, flags);
	379
	380	dev_set_drvdata(&vdev->dev, port);
	381
4d5870ec JP	382	pr_info("%s: PORT ( remote-mac %pM%s )\n",
4d5870ec JP	383	vp->dev->name, port->raddr, switch_port ? " switch-port" : "");
4c521e42	384
31762eaa	385	setup_timer(&port->clean_timer, sunvnet_clean_timer_expire_common,
8e845f4c DS	386	(unsigned long)port);
8e845f4c DS	387
69088822	388	napi_enable(&port->napi);
4c521e42 DM	389	vio_port_up(&port->vio);
4c521e42 DM	390
43fdf274 DM	391	mdesc_release(hp);
43fdf274 DM	392
4c521e42 DM	393	return 0;
4c521e42 DM	394
4c521e42 DM	395	err_out_free_port:
	396	kfree(port);
	397
43fdf274 DM	398	err_out_put_mdesc:
43fdf274 DM	399	mdesc_release(hp);
4c521e42 DM	400	return err;
	401	}
	402
	403	static int vnet_port_remove(struct vio_dev *vdev)
	404	{
	405	struct vnet_port *port = dev_get_drvdata(&vdev->dev);
	406
	407	if (port) {
4c521e42 DM	408	del_timer_sync(&port->vio.timer);
4c521e42 DM	409
69088822	410	napi_disable(&port->napi);
4c521e42	411
2a968dd8 SV	412	list_del_rcu(&port->list);
	413	hlist_del_rcu(&port->hash);
	414
	415	synchronize_rcu();
	416	del_timer_sync(&port->clean_timer);
31762eaa	417	sunvnet_port_rm_txq_common(port);
69088822	418	netif_napi_del(&port->napi);
31762eaa	419	sunvnet_port_free_tx_bufs_common(port);
4c521e42 DM	420	vio_ldc_free(&port->vio);
	421
	422	dev_set_drvdata(&vdev->dev, NULL);
	423
	424	kfree(port);
	425	}
	426	return 0;
	427	}
	428
3d452e55	429	static const struct vio_device_id vnet_port_match[] = {
4c521e42 DM	430	{
	431	.type = "vnet-port",
	432	},
	433	{},
	434	};
da68e081	435	MODULE_DEVICE_TABLE(vio, vnet_port_match);
4c521e42 DM	436
	437	static struct vio_driver vnet_port_driver = {
	438	.id_table = vnet_port_match,
	439	.probe = vnet_port_probe,
	440	.remove = vnet_port_remove,
cb52d897	441	.name = "vnet_port",
4c521e42 DM	442	};
4c521e42 DM	443
4c521e42 DM	444	static int __init vnet_init(void)
4c521e42 DM	445	{
9184a046	446	return vio_register_driver(&vnet_port_driver);
4c521e42 DM	447	}
	448
	449	static void __exit vnet_exit(void)
	450	{
	451	vio_unregister_driver(&vnet_port_driver);
a4b70a07	452	vnet_cleanup();
4c521e42 DM	453	}
	454
	455	module_init(vnet_init);
	456	module_exit(vnet_exit);