1 /* ldmvsw.c: Sun4v LDOM Virtual Switch Driver.
3 * Copyright (C) 2016-2017 Oracle. All rights reserved.
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
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>
21 #if defined(CONFIG_IPV6)
22 #include <linux/icmpv6.h>
27 #include <net/route.h>
32 /* This driver makes use of the common code in sunvnet_common.c */
33 #include "sunvnet_common.h"
35 /* Length of time before we decide the hardware is hung,
36 * and dev->tx_timeout() should be called to fix the problem.
38 #define VSW_TX_TIMEOUT (10 * HZ)
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};
43 #define DRV_MODULE_NAME "ldmvsw"
44 #define DRV_MODULE_VERSION "1.2"
45 #define DRV_MODULE_RELDATE "March 4, 2017"
47 static char version
[] =
48 DRV_MODULE_NAME
" " DRV_MODULE_VERSION
" (" DRV_MODULE_RELDATE
")";
49 MODULE_AUTHOR("Oracle");
50 MODULE_DESCRIPTION("Sun4v LDOM Virtual Switch Driver");
51 MODULE_LICENSE("GPL");
52 MODULE_VERSION(DRV_MODULE_VERSION
);
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 },
62 static void vsw_get_drvinfo(struct net_device
*dev
,
63 struct ethtool_drvinfo
*info
)
65 strlcpy(info
->driver
, DRV_MODULE_NAME
, sizeof(info
->driver
));
66 strlcpy(info
->version
, DRV_MODULE_VERSION
, sizeof(info
->version
));
69 static u32
vsw_get_msglevel(struct net_device
*dev
)
71 struct vnet_port
*port
= netdev_priv(dev
);
73 return port
->vp
->msg_enable
;
76 static void vsw_set_msglevel(struct net_device
*dev
, u32 value
)
78 struct vnet_port
*port
= netdev_priv(dev
);
80 port
->vp
->msg_enable
= value
;
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
,
90 static LIST_HEAD(vnet_list
);
91 static DEFINE_MUTEX(vnet_list_mutex
);
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
)
97 struct vnet_port
*port
= netdev_priv(dev
);
102 static u16
vsw_select_queue(struct net_device
*dev
, struct sk_buff
*skb
,
103 void *accel_priv
, select_queue_fallback_t fallback
)
105 struct vnet_port
*port
= netdev_priv(dev
);
110 return port
->q_index
;
113 /* Wrappers to common functions */
114 static int vsw_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
116 return sunvnet_start_xmit_common(skb
, dev
, vsw_tx_port_find
);
119 static void vsw_set_rx_mode(struct net_device
*dev
)
121 struct vnet_port
*port
= netdev_priv(dev
);
123 return sunvnet_set_rx_mode_common(dev
, port
->vp
);
126 int ldmvsw_open(struct net_device
*dev
)
128 struct vnet_port
*port
= netdev_priv(dev
);
129 struct vio_driver_state
*vio
= &port
->vio
;
131 /* reset the channel */
132 vio_link_state_change(vio
, LDC_EVENT_RESET
);
133 vnet_port_reset(port
);
138 EXPORT_SYMBOL_GPL(ldmvsw_open
);
140 #ifdef CONFIG_NET_POLL_CONTROLLER
141 static void vsw_poll_controller(struct net_device
*dev
)
143 struct vnet_port
*port
= netdev_priv(dev
);
145 return sunvnet_poll_controller_common(dev
, port
->vp
);
149 static const struct net_device_ops vsw_ops
= {
150 .ndo_open
= ldmvsw_open
,
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
,
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
,
163 static const char *local_mac_prop
= "local-mac-address";
164 static const char *cfg_handle_prop
= "cfg-handle";
166 static struct vnet
*vsw_get_vnet(struct mdesc_handle
*hp
,
172 const u64
*local_mac
= NULL
;
173 const u64
*cfghandle
= NULL
;
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
);
181 name
= mdesc_get_property(hp
, target
, "name", NULL
);
182 if (!name
|| strcmp(name
, "virtual-network-switch"))
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
);
191 if (!local_mac
|| !cfghandle
)
192 return ERR_PTR(-ENODEV
);
194 /* find or create associated vnet */
196 mutex_lock(&vnet_list_mutex
);
197 list_for_each_entry(iter
, &vnet_list
, list
) {
198 if (iter
->local_mac
== *local_mac
) {
205 vp
= kzalloc(sizeof(*vp
), GFP_KERNEL
);
207 mutex_unlock(&vnet_list_mutex
);
208 return ERR_PTR(-ENOMEM
);
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
);
218 mutex_unlock(&vnet_list_mutex
);
220 *handle
= (u64
)*cfghandle
;
225 static struct net_device
*vsw_alloc_netdev(u8 hwaddr
[],
226 struct vio_dev
*vdev
,
230 struct net_device
*dev
;
231 struct vnet_port
*port
;
234 dev
= alloc_etherdev_mqs(sizeof(*port
), VNET_MAX_TXQS
, 1);
236 return ERR_PTR(-ENOMEM
);
237 dev
->needed_headroom
= VNET_PACKET_SKIP
+ 8;
238 dev
->needed_tailroom
= 8;
240 for (i
= 0; i
< ETH_ALEN
; i
++) {
241 dev
->dev_addr
[i
] = hwaddr
[i
];
242 dev
->perm_addr
[i
] = dev
->dev_addr
[i
];
245 sprintf(dev
->name
, "vif%d.%d", (int)handle
, (int)port_id
);
247 dev
->netdev_ops
= &vsw_ops
;
248 dev
->ethtool_ops
= &vsw_ethtool_ops
;
249 dev
->watchdog_timeo
= VSW_TX_TIMEOUT
;
251 dev
->hw_features
= NETIF_F_HW_CSUM
| NETIF_F_SG
;
252 dev
->features
= dev
->hw_features
;
254 /* MTU range: 68 - 65535 */
255 dev
->min_mtu
= ETH_MIN_MTU
;
256 dev
->max_mtu
= VNET_MAX_MTU
;
258 SET_NETDEV_DEV(dev
, &vdev
->dev
);
263 static struct ldc_channel_config vsw_ldc_cfg
= {
264 .event
= sunvnet_event_common
,
266 .mode
= LDC_MODE_UNRELIABLE
,
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
,
275 static const char *remote_macaddr_prop
= "remote-mac-address";
276 static const char *id_prop
= "id";
278 static int vsw_port_probe(struct vio_dev
*vdev
, const struct vio_device_id
*id
)
280 struct mdesc_handle
*hp
;
281 struct vnet_port
*port
;
284 struct net_device
*dev
;
292 rmac
= mdesc_get_property(hp
, vdev
->mp
, remote_macaddr_prop
, &len
);
295 pr_err("Port lacks %s property\n", remote_macaddr_prop
);
300 port_id
= mdesc_get_property(hp
, vdev
->mp
, id_prop
, NULL
);
303 pr_err("Port lacks %s property\n", id_prop
);
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
))) {
312 pr_err("Failed to get vnet for vsw-port\n");
319 dev
= vsw_alloc_netdev(vsw_port_hwaddr
, vdev
, handle
, *port_id
);
322 pr_err("Failed to alloc netdev for vsw-port\n");
326 port
= netdev_priv(dev
);
328 INIT_LIST_HEAD(&port
->list
);
330 for (i
= 0; i
< ETH_ALEN
; i
++)
331 port
->raddr
[i
] = (*rmac
>> (5 - i
) * 8) & 0xff;
335 port
->switch_port
= 1;
336 port
->tso
= false; /* no tso in vsw, misbehaves in bridge */
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
347 err
= vio_driver_init(&port
->vio
, vdev
, VDEV_NETWORK
,
348 vsw_versions
, ARRAY_SIZE(vsw_versions
),
349 &vsw_vio_ops
, dev
->name
);
351 goto err_out_free_dev
;
353 err
= vio_ldc_alloc(&port
->vio
, &vsw_ldc_cfg
, port
);
355 goto err_out_free_dev
;
357 dev_set_drvdata(&vdev
->dev
, port
);
359 netif_napi_add(dev
, &port
->napi
, sunvnet_poll_common
,
362 spin_lock_irqsave(&vp
->lock
, flags
);
363 list_add_rcu(&port
->list
, &vp
->port_list
);
364 spin_unlock_irqrestore(&vp
->lock
, flags
);
366 setup_timer(&port
->clean_timer
, sunvnet_clean_timer_expire_common
,
367 (unsigned long)port
);
369 err
= register_netdev(dev
);
371 pr_err("Cannot register net device, aborting\n");
372 goto err_out_del_timer
;
375 spin_lock_irqsave(&vp
->lock
, flags
);
376 sunvnet_port_add_txq_common(port
);
377 spin_unlock_irqrestore(&vp
->lock
, flags
);
379 napi_enable(&port
->napi
);
380 vio_port_up(&port
->vio
);
382 /* assure no carrier until we receive an LDC_EVENT_UP,
383 * even if the vsw config script tries to force us up
385 netif_carrier_off(dev
);
387 netdev_info(dev
, "LDOM vsw-port %pM\n", dev
->dev_addr
);
389 pr_info("%s: PORT ( remote-mac %pM%s )\n", dev
->name
,
390 port
->raddr
, " switch-port");
395 del_timer_sync(&port
->clean_timer
);
396 list_del_rcu(&port
->list
);
398 netif_napi_del(&port
->napi
);
399 dev_set_drvdata(&vdev
->dev
, NULL
);
400 vio_ldc_free(&port
->vio
);
407 static int vsw_port_remove(struct vio_dev
*vdev
)
409 struct vnet_port
*port
= dev_get_drvdata(&vdev
->dev
);
413 del_timer_sync(&port
->vio
.timer
);
415 napi_disable(&port
->napi
);
417 list_del_rcu(&port
->list
);
420 del_timer_sync(&port
->clean_timer
);
421 spin_lock_irqsave(&port
->vp
->lock
, flags
);
422 sunvnet_port_rm_txq_common(port
);
423 spin_unlock_irqrestore(&port
->vp
->lock
, flags
);
424 netif_napi_del(&port
->napi
);
425 sunvnet_port_free_tx_bufs_common(port
);
426 vio_ldc_free(&port
->vio
);
428 dev_set_drvdata(&vdev
->dev
, NULL
);
430 unregister_netdev(port
->dev
);
431 free_netdev(port
->dev
);
437 static void vsw_cleanup(void)
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
);
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");
451 mutex_unlock(&vnet_list_mutex
);
454 static const struct vio_device_id vsw_port_match
[] = {
460 MODULE_DEVICE_TABLE(vio
, vsw_port_match
);
462 static struct vio_driver vsw_port_driver
= {
463 .id_table
= vsw_port_match
,
464 .probe
= vsw_port_probe
,
465 .remove
= vsw_port_remove
,
469 static int __init
vsw_init(void)
471 pr_info("%s\n", version
);
472 return vio_register_driver(&vsw_port_driver
);
475 static void __exit
vsw_exit(void)
477 vio_unregister_driver(&vsw_port_driver
);
481 module_init(vsw_init
);
482 module_exit(vsw_exit
);