[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / sun / ldmvsw.c

/* ldmvsw.c: Sun4v LDOM Virtual Switch Driver.
 *
 * Copyright (C) 2016 Oracle. All rights reserved.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/highmem.h>
#include <linux/if_vlan.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <linux/types.h>

#if defined(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>

/* This driver makes use of the common code in sunvnet_common.c */
#include "sunvnet_common.h"

/* Length of time before we decide the hardware is hung,
 * and dev->tx_timeout() should be called to fix the problem.
 */
#define VSW_TX_TIMEOUT			(10 * HZ)

/* Static HW Addr used for the network interfaces representing vsw ports */
static u8 vsw_port_hwaddr[ETH_ALEN] = {0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};

#define DRV_MODULE_NAME		"ldmvsw"
#define DRV_MODULE_VERSION	"1.0"
#define DRV_MODULE_RELDATE	"Jan 15, 2016"

static char version[] =
	DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
MODULE_AUTHOR("Oracle");
MODULE_DESCRIPTION("Sun4v LDOM Virtual Switch Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_MODULE_VERSION);

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

static void vsw_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 vsw_get_msglevel(struct net_device *dev)
{
	struct vnet_port *port = netdev_priv(dev);

	return port->vp->msg_enable;
}

static void vsw_set_msglevel(struct net_device *dev, u32 value)
{
	struct vnet_port *port = netdev_priv(dev);

	port->vp->msg_enable = value;
}

static const struct ethtool_ops vsw_ethtool_ops = {
	.get_drvinfo		= vsw_get_drvinfo,
	.get_msglevel		= vsw_get_msglevel,
	.set_msglevel		= vsw_set_msglevel,
	.get_link		= ethtool_op_get_link,
};

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

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

	return port;
}

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

	if (!port)
		return 0;

	return port->q_index;
}

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

static void vsw_set_rx_mode(struct net_device *dev)
{
	struct vnet_port *port = netdev_priv(dev);

	return sunvnet_set_rx_mode_common(dev, port->vp);
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static void vsw_poll_controller(struct net_device *dev)
{
	struct vnet_port *port = netdev_priv(dev);

	return sunvnet_poll_controller_common(dev, port->vp);
}
#endif

static const struct net_device_ops vsw_ops = {
	.ndo_open		= sunvnet_open_common,
	.ndo_stop		= sunvnet_close_common,
	.ndo_set_rx_mode	= vsw_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_start_xmit		= vsw_start_xmit,
	.ndo_select_queue	= vsw_select_queue,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller    = vsw_poll_controller,
#endif
};

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

static struct vnet *vsw_get_vnet(struct mdesc_handle *hp,
				 u64 port_node,
				 u64 *handle)
{
	struct vnet *vp;
	struct vnet *iter;
	const u64 *local_mac = NULL;
	const u64 *cfghandle = NULL;
	u64 a;

	/* Get the parent virtual-network-switch macaddr and cfghandle */
	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, "virtual-network-switch"))
			continue;

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

	/* find or create associated vnet */
	vp = NULL;
	mutex_lock(&vnet_list_mutex);
	list_for_each_entry(iter, &vnet_list, list) {
		if (iter->local_mac == *local_mac) {
			vp = iter;
			break;
		}
	}

	if (!vp) {
		vp = kzalloc(sizeof(*vp), GFP_KERNEL);
		if (unlikely(!vp)) {
			mutex_unlock(&vnet_list_mutex);
			return ERR_PTR(-ENOMEM);
		}

		spin_lock_init(&vp->lock);
		INIT_LIST_HEAD(&vp->port_list);
		INIT_LIST_HEAD(&vp->list);
		vp->local_mac = *local_mac;
		list_add(&vp->list, &vnet_list);
	}

	mutex_unlock(&vnet_list_mutex);

	*handle = (u64)*cfghandle;

	return vp;
}

static struct net_device *vsw_alloc_netdev(u8 hwaddr[],
					   struct vio_dev *vdev,
					   u64 handle,
					   u64 port_id)
{
	struct net_device *dev;
	struct vnet_port *port;
	int i;

	dev = alloc_etherdev_mqs(sizeof(*port), 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] = hwaddr[i];
		dev->perm_addr[i] = dev->dev_addr[i];
	}

	sprintf(dev->name, "vif%d.%d", (int)handle, (int)port_id);

	dev->netdev_ops = &vsw_ops;
	dev->ethtool_ops = &vsw_ethtool_ops;
	dev->watchdog_timeo = VSW_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;

	/* MTU range: 68 - 65535 */
	dev->min_mtu = ETH_MIN_MTU;
	dev->max_mtu = VNET_MAX_MTU;

	SET_NETDEV_DEV(dev, &vdev->dev);

	return dev;
}

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

static struct vio_driver_ops vsw_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);
}

static const char *remote_macaddr_prop = "remote-mac-address";
static const char *id_prop = "id";

static int vsw_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;
	struct net_device *dev;
	const u64 *rmac;
	int len, i, err;
	const u64 *port_id;
	u64 handle;

	print_version();

	hp = mdesc_grab();

	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);
		mdesc_release(hp);
		return err;
	}

	port_id = mdesc_get_property(hp, vdev->mp, id_prop, NULL);
	err = -ENODEV;
	if (!port_id) {
		pr_err("Port lacks %s property\n", id_prop);
		mdesc_release(hp);
		return err;
	}

	/* Get (or create) the vnet associated with this port */
	vp = vsw_get_vnet(hp, vdev->mp, &handle);
	if (unlikely(IS_ERR(vp))) {
		err = PTR_ERR(vp);
		pr_err("Failed to get vnet for vsw-port\n");
		mdesc_release(hp);
		return err;
	}

	mdesc_release(hp);

	dev = vsw_alloc_netdev(vsw_port_hwaddr, vdev, handle, *port_id);
	if (IS_ERR(dev)) {
		err = PTR_ERR(dev);
		pr_err("Failed to alloc netdev for vsw-port\n");
		return err;
	}

	port = netdev_priv(dev);

	INIT_LIST_HEAD(&port->list);

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

	port->vp = vp;
	port->dev = dev;
	port->switch_port = 1;
	port->tso = true;
	port->tsolen = 0;

	/* Mark the port as belonging to ldmvsw which directs the
	 * the common code to use the net_device in the vnet_port
	 * rather than the net_device in the vnet (which is used
	 * by sunvnet). This bit is used by the VNET_PORT_TO_NET_DEVICE
	 * macro.
	 */
	port->vsw = 1;

	err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
			      vsw_versions, ARRAY_SIZE(vsw_versions),
			      &vsw_vio_ops, dev->name);
	if (err)
		goto err_out_free_dev;

	err = vio_ldc_alloc(&port->vio, &vsw_ldc_cfg, port);
	if (err)
		goto err_out_free_dev;

	dev_set_drvdata(&vdev->dev, port);

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

	spin_lock_irqsave(&vp->lock, flags);
	list_add_rcu(&port->list, &vp->port_list);
	spin_unlock_irqrestore(&vp->lock, flags);

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

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

	spin_lock_irqsave(&vp->lock, flags);
	sunvnet_port_add_txq_common(port);
	spin_unlock_irqrestore(&vp->lock, flags);

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

	netdev_info(dev, "LDOM vsw-port %pM\n", dev->dev_addr);

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

	return 0;

err_out_del_timer:
	del_timer_sync(&port->clean_timer);
	list_del_rcu(&port->list);
	synchronize_rcu();
	netif_napi_del(&port->napi);
	dev_set_drvdata(&vdev->dev, NULL);
	vio_ldc_free(&port->vio);

err_out_free_dev:
	free_netdev(dev);
	return err;
}

static int vsw_port_remove(struct vio_dev *vdev)
{
	struct vnet_port *port = dev_get_drvdata(&vdev->dev);
	unsigned long flags;

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

		napi_disable(&port->napi);

		list_del_rcu(&port->list);

		synchronize_rcu();
		del_timer_sync(&port->clean_timer);
		spin_lock_irqsave(&port->vp->lock, flags);
		sunvnet_port_rm_txq_common(port);
		spin_unlock_irqrestore(&port->vp->lock, flags);
		netif_napi_del(&port->napi);
		sunvnet_port_free_tx_bufs_common(port);
		vio_ldc_free(&port->vio);

		dev_set_drvdata(&vdev->dev, NULL);

		unregister_netdev(port->dev);
		free_netdev(port->dev);
	}

	return 0;
}

static void vsw_cleanup(void)
{
	struct vnet *vp;

	/* just need to free up the vnet list */
	mutex_lock(&vnet_list_mutex);
	while (!list_empty(&vnet_list)) {
		vp = list_first_entry(&vnet_list, struct vnet, list);
		list_del(&vp->list);
		/* vio_unregister_driver() should have cleaned up port_list */
		if (!list_empty(&vp->port_list))
			pr_err("Ports not removed by VIO subsystem!\n");
		kfree(vp);
	}
	mutex_unlock(&vnet_list_mutex);
}

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

static struct vio_driver vsw_port_driver = {
	.id_table	= vsw_port_match,
	.probe		= vsw_port_probe,
	.remove		= vsw_port_remove,
	.name		= "vsw_port",
};

static int __init vsw_init(void)
{
	return vio_register_driver(&vsw_port_driver);
}

static void __exit vsw_exit(void)
{
	vio_unregister_driver(&vsw_port_driver);
	vsw_cleanup();
}

module_init(vsw_init);
module_exit(vsw_exit);
Commit	Line	Data
5d01fa0c AY	1	/* ldmvsw.c: Sun4v LDOM Virtual Switch Driver.
	2	*
	3	* Copyright (C) 2016 Oracle. All rights reserved.
	4	*/
	5
	6	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	7
	8	#include <linux/delay.h>
	9	#include <linux/etherdevice.h>
	10	#include <linux/ethtool.h>
	11	#include <linux/highmem.h>
	12	#include <linux/if_vlan.h>
	13	#include <linux/init.h>
5d01fa0c AY	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
	16	#include <linux/mutex.h>
	17	#include <linux/netdevice.h>
	18	#include <linux/slab.h>
	19	#include <linux/types.h>
	20
	21	#if defined(CONFIG_IPV6)
	22	#include <linux/icmpv6.h>
	23	#endif
	24
	25	#include <net/ip.h>
	26	#include <net/icmp.h>
	27	#include <net/route.h>
	28
	29	#include <asm/vio.h>
	30	#include <asm/ldc.h>
	31
	32	/* This driver makes use of the common code in sunvnet_common.c */
	33	#include "sunvnet_common.h"
	34
	35	/* Length of time before we decide the hardware is hung,
	36	* and dev->tx_timeout() should be called to fix the problem.
	37	*/
	38	#define VSW_TX_TIMEOUT (10 * HZ)
	39
	40	/* Static HW Addr used for the network interfaces representing vsw ports */
	41	static u8 vsw_port_hwaddr[ETH_ALEN] = {0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
	42
	43	#define DRV_MODULE_NAME "ldmvsw"
	44	#define DRV_MODULE_VERSION "1.0"
	45	#define DRV_MODULE_RELDATE "Jan 15, 2016"
	46
	47	static char version[] =
	48	DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
	49	MODULE_AUTHOR("Oracle");
	50	MODULE_DESCRIPTION("Sun4v LDOM Virtual Switch Driver");
	51	MODULE_LICENSE("GPL");
	52	MODULE_VERSION(DRV_MODULE_VERSION);
	53
	54	/* Ordered from largest major to lowest */
	55	static struct vio_version vsw_versions[] = {
	56	{ .major = 1, .minor = 8 },
	57	{ .major = 1, .minor = 7 },
	58	{ .major = 1, .minor = 6 },
	59	{ .major = 1, .minor = 0 },
	60	};
	61
	62	static void vsw_get_drvinfo(struct net_device *dev,
	63	struct ethtool_drvinfo *info)
	64	{
	65	strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
	66	strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
	67	}
	68
	69	static u32 vsw_get_msglevel(struct net_device *dev)
	70	{
	71	struct vnet_port *port = netdev_priv(dev);
	72
	73	return port->vp->msg_enable;
	74	}
	75
	76	static void vsw_set_msglevel(struct net_device *dev, u32 value)
	77	{
78	struct vnet_port *port = netdev_priv(dev);
79
80	port->vp->msg_enable = value;
81	}
82
83	static const struct ethtool_ops vsw_ethtool_ops = {
84	.get_drvinfo = vsw_get_drvinfo,
85	.get_msglevel = vsw_get_msglevel,
86	.set_msglevel = vsw_set_msglevel,
87	.get_link = ethtool_op_get_link,
88	};
89
90	static LIST_HEAD(vnet_list);
91	static DEFINE_MUTEX(vnet_list_mutex);
92
93	/* func arg to vnet_start_xmit_common() to get the proper tx port */
94	static struct vnet_port vsw_tx_port_find(struct sk_buff skb,
95	struct net_device *dev)
96	{
97	struct vnet_port *port = netdev_priv(dev);
98
99	return port;
100	}
101
102	static u16 vsw_select_queue(struct net_device dev, struct sk_buff skb,
103	void *accel_priv, select_queue_fallback_t fallback)
104	{
105	struct vnet_port *port = netdev_priv(dev);
106
107	if (!port)
108	return 0;
109
110	return port->q_index;
111	}
112
113	/* Wrappers to common functions */
114	static int vsw_start_xmit(struct sk_buff skb, struct net_device dev)
115	{
116	return sunvnet_start_xmit_common(skb, dev, vsw_tx_port_find);
117	}
118
119	static void vsw_set_rx_mode(struct net_device *dev)
120	{
121	struct vnet_port *port = netdev_priv(dev);
122
123	return sunvnet_set_rx_mode_common(dev, port->vp);
124	}
125
126	#ifdef CONFIG_NET_POLL_CONTROLLER
127	static void vsw_poll_controller(struct net_device *dev)
128	{
129	struct vnet_port *port = netdev_priv(dev);
130
131	return sunvnet_poll_controller_common(dev, port->vp);
132	}
133	#endif
134
135	static const struct net_device_ops vsw_ops = {
136	.ndo_open = sunvnet_open_common,
137	.ndo_stop = sunvnet_close_common,
138	.ndo_set_rx_mode = vsw_set_rx_mode,
139	.ndo_set_mac_address = sunvnet_set_mac_addr_common,
140	.ndo_validate_addr = eth_validate_addr,
141	.ndo_tx_timeout = sunvnet_tx_timeout_common,
5d01fa0c AY	142	.ndo_start_xmit = vsw_start_xmit,
	143	.ndo_select_queue = vsw_select_queue,
	144	#ifdef CONFIG_NET_POLL_CONTROLLER
	145	.ndo_poll_controller = vsw_poll_controller,
	146	#endif
	147	};
	148
	149	static const char *local_mac_prop = "local-mac-address";
	150	static const char *cfg_handle_prop = "cfg-handle";
	151
	152	static struct vnet vsw_get_vnet(struct mdesc_handle hp,
	153	u64 port_node,
	154	u64 *handle)
	155	{
	156	struct vnet *vp;
	157	struct vnet *iter;
	158	const u64 *local_mac = NULL;
	159	const u64 *cfghandle = NULL;
	160	u64 a;
	161
	162	/* Get the parent virtual-network-switch macaddr and cfghandle */
	163	mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
	164	u64 target = mdesc_arc_target(hp, a);
	165	const char *name;
	166
	167	name = mdesc_get_property(hp, target, "name", NULL);
	168	if (!name \|\| strcmp(name, "virtual-network-switch"))
	169	continue;
	170
	171	local_mac = mdesc_get_property(hp, target,
	172	local_mac_prop, NULL);
	173	cfghandle = mdesc_get_property(hp, target,
	174	cfg_handle_prop, NULL);
	175	break;
	176	}
	177	if (!local_mac \|\| !cfghandle)
	178	return ERR_PTR(-ENODEV);
	179
	180	/* find or create associated vnet */
	181	vp = NULL;
	182	mutex_lock(&vnet_list_mutex);
	183	list_for_each_entry(iter, &vnet_list, list) {
	184	if (iter->local_mac == *local_mac) {
	185	vp = iter;
	186	break;
	187	}
	188	}
	189
	190	if (!vp) {
	191	vp = kzalloc(sizeof(*vp), GFP_KERNEL);
	192	if (unlikely(!vp)) {
	193	mutex_unlock(&vnet_list_mutex);
	194	return ERR_PTR(-ENOMEM);
	195	}
	196
	197	spin_lock_init(&vp->lock);
	198	INIT_LIST_HEAD(&vp->port_list);
	199	INIT_LIST_HEAD(&vp->list);
	200	vp->local_mac = *local_mac;
	201	list_add(&vp->list, &vnet_list);
	202	}
	203
	204	mutex_unlock(&vnet_list_mutex);
	205
206	handle = (u64)cfghandle;
207
208	return vp;
209	}
210
211	static struct net_device *vsw_alloc_netdev(u8 hwaddr[],
212	struct vio_dev *vdev,
213	u64 handle,
214	u64 port_id)
215	{
216	struct net_device *dev;
217	struct vnet_port *port;
218	int i;
219
220	dev = alloc_etherdev_mqs(sizeof(*port), VNET_MAX_TXQS, 1);
221	if (!dev)
222	return ERR_PTR(-ENOMEM);
223	dev->needed_headroom = VNET_PACKET_SKIP + 8;
224	dev->needed_tailroom = 8;
225
226	for (i = 0; i < ETH_ALEN; i++) {
227	dev->dev_addr[i] = hwaddr[i];
228	dev->perm_addr[i] = dev->dev_addr[i];
229	}
230
231	sprintf(dev->name, "vif%d.%d", (int)handle, (int)port_id);
232
233	dev->netdev_ops = &vsw_ops;
234	dev->ethtool_ops = &vsw_ethtool_ops;
235	dev->watchdog_timeo = VSW_TX_TIMEOUT;
236
237	dev->hw_features = NETIF_F_TSO \| NETIF_F_GSO \| NETIF_F_GSO_SOFTWARE \|
238	NETIF_F_HW_CSUM \| NETIF_F_SG;
239	dev->features = dev->hw_features;
240
540bfe30 JW	241	/* MTU range: 68 - 65535 */
	242	dev->min_mtu = ETH_MIN_MTU;
	243	dev->max_mtu = VNET_MAX_MTU;
	244
5d01fa0c AY	245	SET_NETDEV_DEV(dev, &vdev->dev);
	246
	247	return dev;
	248	}
	249
	250	static struct ldc_channel_config vsw_ldc_cfg = {
	251	.event = sunvnet_event_common,
	252	.mtu = 64,
	253	.mode = LDC_MODE_UNRELIABLE,
	254	};
	255
	256	static struct vio_driver_ops vsw_vio_ops = {
	257	.send_attr = sunvnet_send_attr_common,
	258	.handle_attr = sunvnet_handle_attr_common,
	259	.handshake_complete = sunvnet_handshake_complete_common,
	260	};
	261
	262	static void print_version(void)
	263	{
	264	printk_once(KERN_INFO "%s", version);
	265	}
	266
	267	static const char *remote_macaddr_prop = "remote-mac-address";
	268	static const char *id_prop = "id";
	269
	270	static int vsw_port_probe(struct vio_dev vdev, const struct vio_device_id id)
	271	{
	272	struct mdesc_handle *hp;
	273	struct vnet_port *port;
	274	unsigned long flags;
	275	struct vnet *vp;
	276	struct net_device *dev;
	277	const u64 *rmac;
	278	int len, i, err;
	279	const u64 *port_id;
	280	u64 handle;
	281
	282	print_version();
	283
	284	hp = mdesc_grab();
	285
	286	rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
	287	err = -ENODEV;
	288	if (!rmac) {
	289	pr_err("Port lacks %s property\n", remote_macaddr_prop);
	290	mdesc_release(hp);
	291	return err;
	292	}
	293
	294	port_id = mdesc_get_property(hp, vdev->mp, id_prop, NULL);
	295	err = -ENODEV;
	296	if (!port_id) {
	297	pr_err("Port lacks %s property\n", id_prop);
	298	mdesc_release(hp);
	299	return err;
	300	}
	301
	302	/* Get (or create) the vnet associated with this port */
	303	vp = vsw_get_vnet(hp, vdev->mp, &handle);
	304	if (unlikely(IS_ERR(vp))) {
	305	err = PTR_ERR(vp);
	306	pr_err("Failed to get vnet for vsw-port\n");
	307	mdesc_release(hp);
	308	return err;
309	}
310
311	mdesc_release(hp);
312
313	dev = vsw_alloc_netdev(vsw_port_hwaddr, vdev, handle, *port_id);
314	if (IS_ERR(dev)) {
315	err = PTR_ERR(dev);
316	pr_err("Failed to alloc netdev for vsw-port\n");
317	return err;
318	}
319
320	port = netdev_priv(dev);
321
322	INIT_LIST_HEAD(&port->list);
323
324	for (i = 0; i < ETH_ALEN; i++)
325	port->raddr[i] = (rmac >> (5 - i) 8) & 0xff;
326
327	port->vp = vp;
328	port->dev = dev;
329	port->switch_port = 1;
330	port->tso = true;
331	port->tsolen = 0;
332
333	/* Mark the port as belonging to ldmvsw which directs the
334	* the common code to use the net_device in the vnet_port
335	* rather than the net_device in the vnet (which is used
336	* by sunvnet). This bit is used by the VNET_PORT_TO_NET_DEVICE
337	* macro.
338	*/
339	port->vsw = 1;
340
341	err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
342	vsw_versions, ARRAY_SIZE(vsw_versions),
343	&vsw_vio_ops, dev->name);
344	if (err)
345	goto err_out_free_dev;
346
347	err = vio_ldc_alloc(&port->vio, &vsw_ldc_cfg, port);
348	if (err)
349	goto err_out_free_dev;
350
351	dev_set_drvdata(&vdev->dev, port);
352
353	netif_napi_add(dev, &port->napi, sunvnet_poll_common,
354	NAPI_POLL_WEIGHT);
355
356	spin_lock_irqsave(&vp->lock, flags);
357	list_add_rcu(&port->list, &vp->port_list);
358	spin_unlock_irqrestore(&vp->lock, flags);
359
360	setup_timer(&port->clean_timer, sunvnet_clean_timer_expire_common,
361	(unsigned long)port);
362
363	err = register_netdev(dev);
364	if (err) {
365	pr_err("Cannot register net device, aborting\n");
366	goto err_out_del_timer;
367	}
368
369	spin_lock_irqsave(&vp->lock, flags);
370	sunvnet_port_add_txq_common(port);
371	spin_unlock_irqrestore(&vp->lock, flags);
372
373	napi_enable(&port->napi);
374	vio_port_up(&port->vio);
375
376	netdev_info(dev, "LDOM vsw-port %pM\n", dev->dev_addr);
377
378	pr_info("%s: PORT ( remote-mac %pM%s )\n", dev->name,
379	port->raddr, " switch-port");
380
381	return 0;
382
383	err_out_del_timer:
384	del_timer_sync(&port->clean_timer);
385	list_del_rcu(&port->list);
386	synchronize_rcu();
387	netif_napi_del(&port->napi);
388	dev_set_drvdata(&vdev->dev, NULL);
389	vio_ldc_free(&port->vio);
390
391	err_out_free_dev:
392	free_netdev(dev);
393	return err;
394	}
395
396	static int vsw_port_remove(struct vio_dev *vdev)
397	{
398	struct vnet_port *port = dev_get_drvdata(&vdev->dev);
399	unsigned long flags;
400
401	if (port) {
402	del_timer_sync(&port->vio.timer);
403
404	napi_disable(&port->napi);
405
406	list_del_rcu(&port->list);
407
408	synchronize_rcu();
409	del_timer_sync(&port->clean_timer);
410	spin_lock_irqsave(&port->vp->lock, flags);
411	sunvnet_port_rm_txq_common(port);
412	spin_unlock_irqrestore(&port->vp->lock, flags);
413	netif_napi_del(&port->napi);
414	sunvnet_port_free_tx_bufs_common(port);
415	vio_ldc_free(&port->vio);
416
417	dev_set_drvdata(&vdev->dev, NULL);
418
419	unregister_netdev(port->dev);
420	free_netdev(port->dev);
421	}
422
423	return 0;
424	}
425
426	static void vsw_cleanup(void)
427	{
428	struct vnet *vp;
429
430	/* just need to free up the vnet list */
431	mutex_lock(&vnet_list_mutex);
432	while (!list_empty(&vnet_list)) {
433	vp = list_first_entry(&vnet_list, struct vnet, list);
434	list_del(&vp->list);
435	/* vio_unregister_driver() should have cleaned up port_list */
436	if (!list_empty(&vp->port_list))
437	pr_err("Ports not removed by VIO subsystem!\n");
438	kfree(vp);
439	}
440	mutex_unlock(&vnet_list_mutex);
441	}
442
443	static const struct vio_device_id vsw_port_match[] = {
444	{
445	.type = "vsw-port",
446	},
447	{},
448	};
449	MODULE_DEVICE_TABLE(vio, vsw_port_match);
450
451	static struct vio_driver vsw_port_driver = {
452	.id_table = vsw_port_match,
453	.probe = vsw_port_probe,
454	.remove = vsw_port_remove,
455	.name = "vsw_port",
456	};
457
458	static int __init vsw_init(void)
459	{
460	return vio_register_driver(&vsw_port_driver);
461	}
462
463	static void __exit vsw_exit(void)
464	{
465	vio_unregister_driver(&vsw_port_driver);
466	vsw_cleanup();
467	}
468
469	module_init(vsw_init);
470	module_exit(vsw_exit);