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

/* ldmvsw.c: Sun4v LDOM Virtual Switch Driver.
 *
 * Copyright (C) 2016-2017 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	"1.2"
#define DRV_MODULE_RELDATE	"March 4, 2017"

static char version[] =
	DRV_MODULE_NAME " " DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")";
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);
}

int ldmvsw_open(struct net_device *dev)
{
	struct vnet_port *port = netdev_priv(dev);
	struct vio_driver_state *vio = &port->vio;

	/* reset the channel */
	vio_link_state_change(vio, LDC_EVENT_RESET);
	vnet_port_reset(port);
	vio_port_up(vio);

	return 0;
}
EXPORT_SYMBOL_GPL(ldmvsw_open);

#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		= ldmvsw_open,
	.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_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 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;

	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 = false; /* no tso in vsw, misbehaves in bridge */
	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);

	/* assure no carrier until we receive an LDC_EVENT_UP,
	 * even if the vsw config script tries to force us up
	 */
	netif_carrier_off(dev);

	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);
		del_timer_sync(&port->clean_timer);

		napi_disable(&port->napi);
		unregister_netdev(port->dev);

		list_del_rcu(&port->list);

		synchronize_rcu();
		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);

		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)
{
	pr_info("%s\n", version);
	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.
5d01fa0c AY	2	*
867fa150	3	* Copyright (C) 2016-2017 Oracle. All rights reserved.
5d01fa0c AY	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"
867fa150 SN	44	#define DRV_MODULE_VERSION "1.2"
867fa150 SN	45	#define DRV_MODULE_RELDATE "March 4, 2017"
5d01fa0c AY	46
5d01fa0c AY	47	static char version[] =
7602011f	48	DRV_MODULE_NAME " " DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")";
5d01fa0c AY	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
867fa150 SN	126	int ldmvsw_open(struct net_device *dev)
	127	{
	128	struct vnet_port *port = netdev_priv(dev);
	129	struct vio_driver_state *vio = &port->vio;
	130
	131	/* reset the channel */
	132	vio_link_state_change(vio, LDC_EVENT_RESET);
	133	vnet_port_reset(port);
	134	vio_port_up(vio);
	135
	136	return 0;
	137	}
	138	EXPORT_SYMBOL_GPL(ldmvsw_open);
	139
5d01fa0c AY	140	#ifdef CONFIG_NET_POLL_CONTROLLER
	141	static void vsw_poll_controller(struct net_device *dev)
	142	{
	143	struct vnet_port *port = netdev_priv(dev);
	144
	145	return sunvnet_poll_controller_common(dev, port->vp);
	146	}
	147	#endif
	148
	149	static const struct net_device_ops vsw_ops = {
867fa150	150	.ndo_open = ldmvsw_open,
5d01fa0c AY	151	.ndo_stop = sunvnet_close_common,
	152	.ndo_set_rx_mode = vsw_set_rx_mode,
	153	.ndo_set_mac_address = sunvnet_set_mac_addr_common,
	154	.ndo_validate_addr = eth_validate_addr,
	155	.ndo_tx_timeout = sunvnet_tx_timeout_common,
5d01fa0c AY	156	.ndo_start_xmit = vsw_start_xmit,
	157	.ndo_select_queue = vsw_select_queue,
	158	#ifdef CONFIG_NET_POLL_CONTROLLER
	159	.ndo_poll_controller = vsw_poll_controller,
	160	#endif
	161	};
	162
	163	static const char *local_mac_prop = "local-mac-address";
	164	static const char *cfg_handle_prop = "cfg-handle";
	165
	166	static struct vnet vsw_get_vnet(struct mdesc_handle hp,
	167	u64 port_node,
	168	u64 *handle)
	169	{
	170	struct vnet *vp;
	171	struct vnet *iter;
	172	const u64 *local_mac = NULL;
	173	const u64 *cfghandle = NULL;
	174	u64 a;
	175
	176	/* Get the parent virtual-network-switch macaddr and cfghandle */
	177	mdesc_for_each_arc(a, hp, port_node, MDESC_ARC_TYPE_BACK) {
	178	u64 target = mdesc_arc_target(hp, a);
	179	const char *name;
	180
	181	name = mdesc_get_property(hp, target, "name", NULL);
	182	if (!name \|\| strcmp(name, "virtual-network-switch"))
	183	continue;
	184
	185	local_mac = mdesc_get_property(hp, target,
	186	local_mac_prop, NULL);
	187	cfghandle = mdesc_get_property(hp, target,
	188	cfg_handle_prop, NULL);
	189	break;
	190	}
	191	if (!local_mac \|\| !cfghandle)
	192	return ERR_PTR(-ENODEV);
	193
	194	/* find or create associated vnet */
	195	vp = NULL;
	196	mutex_lock(&vnet_list_mutex);
	197	list_for_each_entry(iter, &vnet_list, list) {
	198	if (iter->local_mac == *local_mac) {
	199	vp = iter;
	200	break;
	201	}
	202	}
	203
	204	if (!vp) {
	205	vp = kzalloc(sizeof(*vp), GFP_KERNEL);
	206	if (unlikely(!vp)) {
	207	mutex_unlock(&vnet_list_mutex);
	208	return ERR_PTR(-ENOMEM);
	209	}
	210
	211	spin_lock_init(&vp->lock);
	212	INIT_LIST_HEAD(&vp->port_list);
	213	INIT_LIST_HEAD(&vp->list);
	214	vp->local_mac = *local_mac;
	215	list_add(&vp->list, &vnet_list);
	216	}
	217
	218	mutex_unlock(&vnet_list_mutex);
	219
220	handle = (u64)cfghandle;
221
222	return vp;
223	}
224
225	static struct net_device *vsw_alloc_netdev(u8 hwaddr[],
226	struct vio_dev *vdev,
227	u64 handle,
228	u64 port_id)
229	{
230	struct net_device *dev;
231	struct vnet_port *port;
232	int i;
233
234	dev = alloc_etherdev_mqs(sizeof(*port), VNET_MAX_TXQS, 1);
235	if (!dev)
236	return ERR_PTR(-ENOMEM);
237	dev->needed_headroom = VNET_PACKET_SKIP + 8;
238	dev->needed_tailroom = 8;
239
240	for (i = 0; i < ETH_ALEN; i++) {
241	dev->dev_addr[i] = hwaddr[i];
242	dev->perm_addr[i] = dev->dev_addr[i];
243	}
244
245	sprintf(dev->name, "vif%d.%d", (int)handle, (int)port_id);
246
247	dev->netdev_ops = &vsw_ops;
248	dev->ethtool_ops = &vsw_ethtool_ops;
249	dev->watchdog_timeo = VSW_TX_TIMEOUT;
250
bc221a34	251	dev->hw_features = NETIF_F_HW_CSUM \| NETIF_F_SG;
5d01fa0c AY	252	dev->features = dev->hw_features;
5d01fa0c AY	253
540bfe30 JW	254	/* MTU range: 68 - 65535 */
	255	dev->min_mtu = ETH_MIN_MTU;
	256	dev->max_mtu = VNET_MAX_MTU;
	257
5d01fa0c AY	258	SET_NETDEV_DEV(dev, &vdev->dev);
	259
	260	return dev;
	261	}
	262
	263	static struct ldc_channel_config vsw_ldc_cfg = {
	264	.event = sunvnet_event_common,
	265	.mtu = 64,
	266	.mode = LDC_MODE_UNRELIABLE,
	267	};
	268
	269	static struct vio_driver_ops vsw_vio_ops = {
	270	.send_attr = sunvnet_send_attr_common,
	271	.handle_attr = sunvnet_handle_attr_common,
	272	.handshake_complete = sunvnet_handshake_complete_common,
	273	};
	274
5d01fa0c AY	275	static const char *remote_macaddr_prop = "remote-mac-address";
	276	static const char *id_prop = "id";
	277
	278	static int vsw_port_probe(struct vio_dev vdev, const struct vio_device_id id)
	279	{
	280	struct mdesc_handle *hp;
	281	struct vnet_port *port;
	282	unsigned long flags;
	283	struct vnet *vp;
	284	struct net_device *dev;
	285	const u64 *rmac;
	286	int len, i, err;
	287	const u64 *port_id;
	288	u64 handle;
	289
5d01fa0c AY	290	hp = mdesc_grab();
	291
	292	rmac = mdesc_get_property(hp, vdev->mp, remote_macaddr_prop, &len);
	293	err = -ENODEV;
	294	if (!rmac) {
	295	pr_err("Port lacks %s property\n", remote_macaddr_prop);
	296	mdesc_release(hp);
	297	return err;
	298	}
	299
	300	port_id = mdesc_get_property(hp, vdev->mp, id_prop, NULL);
	301	err = -ENODEV;
	302	if (!port_id) {
	303	pr_err("Port lacks %s property\n", id_prop);
	304	mdesc_release(hp);
	305	return err;
	306	}
	307
	308	/* Get (or create) the vnet associated with this port */
	309	vp = vsw_get_vnet(hp, vdev->mp, &handle);
	310	if (unlikely(IS_ERR(vp))) {
	311	err = PTR_ERR(vp);
	312	pr_err("Failed to get vnet for vsw-port\n");
	313	mdesc_release(hp);
	314	return err;
	315	}
	316
	317	mdesc_release(hp);
	318
	319	dev = vsw_alloc_netdev(vsw_port_hwaddr, vdev, handle, *port_id);
	320	if (IS_ERR(dev)) {
	321	err = PTR_ERR(dev);
	322	pr_err("Failed to alloc netdev for vsw-port\n");
	323	return err;
	324	}
	325
	326	port = netdev_priv(dev);
	327
	328	INIT_LIST_HEAD(&port->list);
	329
	330	for (i = 0; i < ETH_ALEN; i++)
	331	port->raddr[i] = (rmac >> (5 - i) 8) & 0xff;
	332
	333	port->vp = vp;
	334	port->dev = dev;
	335	port->switch_port = 1;
bc221a34	336	port->tso = false; /* no tso in vsw, misbehaves in bridge */
5d01fa0c AY	337	port->tsolen = 0;
	338
	339	/* Mark the port as belonging to ldmvsw which directs the
	340	* the common code to use the net_device in the vnet_port
	341	* rather than the net_device in the vnet (which is used
	342	* by sunvnet). This bit is used by the VNET_PORT_TO_NET_DEVICE
	343	* macro.
	344	*/
	345	port->vsw = 1;
	346
	347	err = vio_driver_init(&port->vio, vdev, VDEV_NETWORK,
	348	vsw_versions, ARRAY_SIZE(vsw_versions),
	349	&vsw_vio_ops, dev->name);
	350	if (err)
	351	goto err_out_free_dev;
	352
	353	err = vio_ldc_alloc(&port->vio, &vsw_ldc_cfg, port);
	354	if (err)
	355	goto err_out_free_dev;
	356
	357	dev_set_drvdata(&vdev->dev, port);
	358
	359	netif_napi_add(dev, &port->napi, sunvnet_poll_common,
	360	NAPI_POLL_WEIGHT);
	361
	362	spin_lock_irqsave(&vp->lock, flags);
	363	list_add_rcu(&port->list, &vp->port_list);
	364	spin_unlock_irqrestore(&vp->lock, flags);
	365
	366	setup_timer(&port->clean_timer, sunvnet_clean_timer_expire_common,
	367	(unsigned long)port);
	368
	369	err = register_netdev(dev);
	370	if (err) {
	371	pr_err("Cannot register net device, aborting\n");
	372	goto err_out_del_timer;
	373	}
	374
	375	spin_lock_irqsave(&vp->lock, flags);
	376	sunvnet_port_add_txq_common(port);
	377	spin_unlock_irqrestore(&vp->lock, flags);
	378
	379	napi_enable(&port->napi);
	380	vio_port_up(&port->vio);
	381
867fa150 SN	382	/* assure no carrier until we receive an LDC_EVENT_UP,
	383	* even if the vsw config script tries to force us up
	384	*/
	385	netif_carrier_off(dev);
	386
5d01fa0c AY	387	netdev_info(dev, "LDOM vsw-port %pM\n", dev->dev_addr);
	388
	389	pr_info("%s: PORT ( remote-mac %pM%s )\n", dev->name,
	390	port->raddr, " switch-port");
	391
	392	return 0;
	393
	394	err_out_del_timer:
	395	del_timer_sync(&port->clean_timer);
	396	list_del_rcu(&port->list);
	397	synchronize_rcu();
	398	netif_napi_del(&port->napi);
	399	dev_set_drvdata(&vdev->dev, NULL);
	400	vio_ldc_free(&port->vio);
	401
	402	err_out_free_dev:
	403	free_netdev(dev);
	404	return err;
	405	}
	406
	407	static int vsw_port_remove(struct vio_dev *vdev)
	408	{
	409	struct vnet_port *port = dev_get_drvdata(&vdev->dev);
	410	unsigned long flags;
	411
	412	if (port) {
	413	del_timer_sync(&port->vio.timer);
8b671f90	414	del_timer_sync(&port->clean_timer);
5d01fa0c AY	415
5d01fa0c AY	416	napi_disable(&port->napi);
b18e5e86	417	unregister_netdev(port->dev);
5d01fa0c AY	418
	419	list_del_rcu(&port->list);
	420
	421	synchronize_rcu();
5d01fa0c AY	422	spin_lock_irqsave(&port->vp->lock, flags);
	423	sunvnet_port_rm_txq_common(port);
	424	spin_unlock_irqrestore(&port->vp->lock, flags);
	425	netif_napi_del(&port->napi);
	426	sunvnet_port_free_tx_bufs_common(port);
	427	vio_ldc_free(&port->vio);
	428
	429	dev_set_drvdata(&vdev->dev, NULL);
	430
5d01fa0c AY	431	free_netdev(port->dev);
	432	}
	433
	434	return 0;
	435	}
	436
	437	static void vsw_cleanup(void)
	438	{
	439	struct vnet *vp;
	440
	441	/* just need to free up the vnet list */
	442	mutex_lock(&vnet_list_mutex);
	443	while (!list_empty(&vnet_list)) {
	444	vp = list_first_entry(&vnet_list, struct vnet, list);
	445	list_del(&vp->list);
	446	/* vio_unregister_driver() should have cleaned up port_list */
	447	if (!list_empty(&vp->port_list))
	448	pr_err("Ports not removed by VIO subsystem!\n");
	449	kfree(vp);
	450	}
	451	mutex_unlock(&vnet_list_mutex);
	452	}
	453
	454	static const struct vio_device_id vsw_port_match[] = {
	455	{
	456	.type = "vsw-port",
	457	},
	458	{},
	459	};
	460	MODULE_DEVICE_TABLE(vio, vsw_port_match);
	461
	462	static struct vio_driver vsw_port_driver = {
	463	.id_table = vsw_port_match,
	464	.probe = vsw_port_probe,
	465	.remove = vsw_port_remove,
	466	.name = "vsw_port",
	467	};
	468
	469	static int __init vsw_init(void)
	470	{
7602011f	471	pr_info("%s\n", version);
5d01fa0c AY	472	return vio_register_driver(&vsw_port_driver);
	473	}
	474
	475	static void __exit vsw_exit(void)
	476	{
	477	vio_unregister_driver(&vsw_port_driver);
	478	vsw_cleanup();
	479	}
	480
	481	module_init(vsw_init);
	482	module_exit(vsw_exit);