2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
4 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
38 #include <linux/list.h>
39 #include <linux/skbuff.h>
40 #include <linux/netdevice.h>
41 #include <linux/workqueue.h>
42 #include <linux/kref.h>
43 #include <linux/if_infiniband.h>
44 #include <linux/mutex.h>
46 #include <net/neighbour.h>
47 #include <net/sch_generic.h>
49 #include <linux/atomic.h>
51 #include <rdma/ib_verbs.h>
52 #include <rdma/ib_pack.h>
53 #include <rdma/ib_sa.h>
54 #include <linux/sched.h>
58 enum ipoib_flush_level {
67 IPOIB_UD_HEAD_SIZE = IB_GRH_BYTES + IPOIB_ENCAP_LEN,
68 IPOIB_UD_RX_SG = 2, /* max buffer needed for 4K mtu */
70 IPOIB_CM_MTU = 0x10000 - 0x10, /* padding to align header to 16 */
71 IPOIB_CM_BUF_SIZE = IPOIB_CM_MTU + IPOIB_ENCAP_LEN,
72 IPOIB_CM_HEAD_SIZE = IPOIB_CM_BUF_SIZE % PAGE_SIZE,
73 IPOIB_CM_RX_SG = ALIGN(IPOIB_CM_BUF_SIZE, PAGE_SIZE) / PAGE_SIZE,
74 IPOIB_RX_RING_SIZE = 256,
75 IPOIB_TX_RING_SIZE = 128,
76 IPOIB_MAX_QUEUE_SIZE = 8192,
77 IPOIB_MIN_QUEUE_SIZE = 2,
78 IPOIB_CM_MAX_CONN_QP = 4096,
82 IPOIB_MAX_PATH_REC_QUEUE = 3,
83 IPOIB_MAX_MCAST_QUEUE = 3,
85 IPOIB_FLAG_OPER_UP = 0,
86 IPOIB_FLAG_INITIALIZED = 1,
87 IPOIB_FLAG_ADMIN_UP = 2,
88 IPOIB_PKEY_ASSIGNED = 3,
90 IPOIB_FLAG_SUBINTERFACE = 5,
92 IPOIB_STOP_REAPER = 7,
93 IPOIB_FLAG_ADMIN_CM = 9,
94 IPOIB_FLAG_UMCAST = 10,
95 IPOIB_STOP_NEIGH_GC = 11,
96 IPOIB_NEIGH_TBL_FLUSH = 12,
98 IPOIB_MAX_BACKOFF_SECONDS = 16,
100 IPOIB_MCAST_FLAG_FOUND = 0, /* used in set_multicast_list */
101 IPOIB_MCAST_FLAG_SENDONLY = 1,
102 IPOIB_MCAST_FLAG_BUSY = 2, /* joining or already joined */
103 IPOIB_MCAST_FLAG_ATTACHED = 3,
106 IPOIB_CM_COPYBREAK = 256,
109 #define IPOIB_OP_RECV (1ul << 31)
110 #ifdef CONFIG_INFINIBAND_IPOIB_CM
111 #define IPOIB_OP_CM (1ul << 30)
113 #define IPOIB_OP_CM (0)
118 struct ipoib_header {
124 struct qdisc_skb_cb qdisc_cb;
125 u8 hwaddr[INFINIBAND_ALEN];
128 /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
130 struct ib_sa_mcmember_rec mcmember;
131 struct ib_sa_multicast *mc;
134 struct rb_node rb_node;
135 struct list_head list;
137 unsigned long created;
138 unsigned long backoff;
141 unsigned char logcount;
143 struct list_head neigh_list;
145 struct sk_buff_head pkt_queue;
147 struct net_device *dev;
150 struct ipoib_rx_buf {
152 u64 mapping[IPOIB_UD_RX_SG];
155 struct ipoib_tx_buf {
157 u64 mapping[MAX_SKB_FRAGS + 1];
160 struct ipoib_cm_tx_buf {
167 struct ipoib_cm_data {
168 __be32 qpn; /* High byte MUST be ignored on receive */
173 * Quoting 10.3.1 Queue Pair and EE Context States:
175 * Note, for QPs that are associated with an SRQ, the Consumer should take the
176 * QP through the Error State before invoking a Destroy QP or a Modify QP to the
177 * Reset State. The Consumer may invoke the Destroy QP without first performing
178 * a Modify QP to the Error State and waiting for the Affiliated Asynchronous
179 * Last WQE Reached Event. However, if the Consumer does not wait for the
180 * Affiliated Asynchronous Last WQE Reached Event, then WQE and Data Segment
181 * leakage may occur. Therefore, it is good programming practice to tear down a
182 * QP that is associated with an SRQ by using the following process:
184 * - Put the QP in the Error State
185 * - Wait for the Affiliated Asynchronous Last WQE Reached Event;
187 * drain the CQ by invoking the Poll CQ verb and either wait for CQ
188 * to be empty or the number of Poll CQ operations has exceeded
191 * post another WR that completes on the same CQ and wait for this
192 * WR to return as a WC;
193 * - and then invoke a Destroy QP or Reset QP.
195 * We use the second option and wait for a completion on the
196 * same CQ before destroying QPs attached to our SRQ.
199 enum ipoib_cm_state {
201 IPOIB_CM_RX_ERROR, /* Ignored by stale task */
202 IPOIB_CM_RX_FLUSH /* Last WQE Reached event observed */
208 struct ipoib_cm_rx_buf *rx_ring;
209 struct list_head list;
210 struct net_device *dev;
211 unsigned long jiffies;
212 enum ipoib_cm_state state;
219 struct list_head list;
220 struct net_device *dev;
221 struct ipoib_neigh *neigh;
222 struct ipoib_path *path;
223 struct ipoib_cm_tx_buf *tx_ring;
230 struct ipoib_cm_rx_buf {
232 u64 mapping[IPOIB_CM_RX_SG];
235 struct ipoib_cm_dev_priv {
237 struct ipoib_cm_rx_buf *srq_ring;
239 struct list_head passive_ids; /* state: LIVE */
240 struct list_head rx_error_list; /* state: ERROR */
241 struct list_head rx_flush_list; /* state: FLUSH, drain not started */
242 struct list_head rx_drain_list; /* state: FLUSH, drain started */
243 struct list_head rx_reap_list; /* state: FLUSH, drain done */
244 struct work_struct start_task;
245 struct work_struct reap_task;
246 struct work_struct skb_task;
247 struct work_struct rx_reap_task;
248 struct delayed_work stale_task;
249 struct sk_buff_head skb_queue;
250 struct list_head start_list;
251 struct list_head reap_list;
252 struct ib_wc ibwc[IPOIB_NUM_WC];
253 struct ib_sge rx_sge[IPOIB_CM_RX_SG];
254 struct ib_recv_wr rx_wr;
260 struct ipoib_ethtool_st {
262 u16 max_coalesced_frames;
265 struct ipoib_neigh_table;
267 struct ipoib_neigh_hash {
268 struct ipoib_neigh_table *ntbl;
269 struct ipoib_neigh __rcu **buckets;
275 struct ipoib_neigh_table {
276 struct ipoib_neigh_hash __rcu *htbl;
278 struct completion flushed;
279 struct completion deleted;
283 * Device private locking: network stack tx_lock protects members used
284 * in TX fast path, lock protects everything else. lock nests inside
285 * of tx_lock (ie tx_lock must be acquired first if needed).
287 struct ipoib_dev_priv {
290 struct net_device *dev;
292 struct napi_struct napi;
296 struct mutex vlan_mutex;
298 struct rb_root path_tree;
299 struct list_head path_list;
301 struct ipoib_neigh_table ntbl;
303 struct ipoib_mcast *broadcast;
304 struct list_head multicast_list;
305 struct rb_root multicast_tree;
307 struct delayed_work pkey_poll_task;
308 struct delayed_work mcast_task;
309 struct work_struct carrier_on_task;
310 struct work_struct flush_light;
311 struct work_struct flush_normal;
312 struct work_struct flush_heavy;
313 struct work_struct restart_task;
314 struct delayed_work ah_reap_task;
315 struct delayed_work neigh_reap_task;
316 struct ib_device *ca;
322 struct ib_cq *recv_cq;
323 struct ib_cq *send_cq;
327 union ib_gid local_gid;
330 unsigned int admin_mtu;
331 unsigned int mcast_mtu;
332 unsigned int max_ib_mtu;
334 struct ipoib_rx_buf *rx_ring;
336 struct ipoib_tx_buf *tx_ring;
339 struct ib_sge tx_sge[MAX_SKB_FRAGS + 1];
340 struct ib_send_wr tx_wr;
341 unsigned tx_outstanding;
342 struct ib_wc send_wc[MAX_SEND_CQE];
344 struct ib_recv_wr rx_wr;
345 struct ib_sge rx_sge[IPOIB_UD_RX_SG];
347 struct ib_wc ibwc[IPOIB_NUM_WC];
349 struct list_head dead_ahs;
351 struct ib_event_handler event_handler;
353 struct net_device *parent;
354 struct list_head child_intfs;
355 struct list_head list;
357 #ifdef CONFIG_INFINIBAND_IPOIB_CM
358 struct ipoib_cm_dev_priv cm;
361 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
362 struct list_head fs_list;
363 struct dentry *mcg_dentry;
364 struct dentry *path_dentry;
367 struct ipoib_ethtool_st ethtool;
368 struct timer_list poll_timer;
372 struct net_device *dev;
374 struct list_head list;
380 struct net_device *dev;
381 struct ib_sa_path_rec pathrec;
383 struct sk_buff_head queue;
385 struct list_head neigh_list;
388 struct ib_sa_query *query;
389 struct completion done;
391 struct rb_node rb_node;
392 struct list_head list;
398 #ifdef CONFIG_INFINIBAND_IPOIB_CM
399 struct ipoib_cm_tx *cm;
401 u8 daddr[INFINIBAND_ALEN];
402 struct sk_buff_head queue;
404 struct net_device *dev;
406 struct list_head list;
407 struct ipoib_neigh __rcu *hnext;
413 #define IPOIB_UD_MTU(ib_mtu) (ib_mtu - IPOIB_ENCAP_LEN)
414 #define IPOIB_UD_BUF_SIZE(ib_mtu) (ib_mtu + IB_GRH_BYTES)
416 static inline int ipoib_ud_need_sg(unsigned int ib_mtu)
418 return IPOIB_UD_BUF_SIZE(ib_mtu) > PAGE_SIZE;
421 void ipoib_neigh_dtor(struct ipoib_neigh *neigh);
422 static inline void ipoib_neigh_put(struct ipoib_neigh *neigh)
424 if (atomic_dec_and_test(&neigh->refcnt))
425 ipoib_neigh_dtor(neigh);
427 struct ipoib_neigh *ipoib_neigh_get(struct net_device *dev, u8 *daddr);
428 struct ipoib_neigh *ipoib_neigh_alloc(u8 *daddr,
429 struct net_device *dev);
430 void ipoib_neigh_free(struct ipoib_neigh *neigh);
431 void ipoib_del_neighs_by_gid(struct net_device *dev, u8 *gid);
433 extern struct workqueue_struct *ipoib_workqueue;
437 int ipoib_poll(struct napi_struct *napi, int budget);
438 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr);
439 void ipoib_send_comp_handler(struct ib_cq *cq, void *dev_ptr);
441 struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
442 struct ib_pd *pd, struct ib_ah_attr *attr);
443 void ipoib_free_ah(struct kref *kref);
444 static inline void ipoib_put_ah(struct ipoib_ah *ah)
446 kref_put(&ah->ref, ipoib_free_ah);
448 int ipoib_open(struct net_device *dev);
449 int ipoib_add_pkey_attr(struct net_device *dev);
450 int ipoib_add_umcast_attr(struct net_device *dev);
452 void ipoib_send(struct net_device *dev, struct sk_buff *skb,
453 struct ipoib_ah *address, u32 qpn);
454 void ipoib_reap_ah(struct work_struct *work);
456 void ipoib_mark_paths_invalid(struct net_device *dev);
457 void ipoib_flush_paths(struct net_device *dev);
458 struct ipoib_dev_priv *ipoib_intf_alloc(const char *format);
460 int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
461 void ipoib_ib_dev_flush_light(struct work_struct *work);
462 void ipoib_ib_dev_flush_normal(struct work_struct *work);
463 void ipoib_ib_dev_flush_heavy(struct work_struct *work);
464 void ipoib_pkey_event(struct work_struct *work);
465 void ipoib_ib_dev_cleanup(struct net_device *dev);
467 int ipoib_ib_dev_open(struct net_device *dev);
468 int ipoib_ib_dev_up(struct net_device *dev);
469 int ipoib_ib_dev_down(struct net_device *dev, int flush);
470 int ipoib_ib_dev_stop(struct net_device *dev, int flush);
472 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
473 void ipoib_dev_cleanup(struct net_device *dev);
475 void ipoib_mcast_join_task(struct work_struct *work);
476 void ipoib_mcast_carrier_on_task(struct work_struct *work);
477 void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb);
479 void ipoib_mcast_restart_task(struct work_struct *work);
480 int ipoib_mcast_start_thread(struct net_device *dev);
481 int ipoib_mcast_stop_thread(struct net_device *dev, int flush);
483 void ipoib_mcast_dev_down(struct net_device *dev);
484 void ipoib_mcast_dev_flush(struct net_device *dev);
486 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
487 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev);
488 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter);
489 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
491 unsigned long *created,
492 unsigned int *queuelen,
493 unsigned int *complete,
494 unsigned int *send_only);
496 struct ipoib_path_iter *ipoib_path_iter_init(struct net_device *dev);
497 int ipoib_path_iter_next(struct ipoib_path_iter *iter);
498 void ipoib_path_iter_read(struct ipoib_path_iter *iter,
499 struct ipoib_path *path);
502 int ipoib_mcast_attach(struct net_device *dev, u16 mlid,
503 union ib_gid *mgid, int set_qkey);
505 int ipoib_init_qp(struct net_device *dev);
506 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca);
507 void ipoib_transport_dev_cleanup(struct net_device *dev);
509 void ipoib_event(struct ib_event_handler *handler,
510 struct ib_event *record);
512 int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey);
513 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey);
515 void ipoib_pkey_poll(struct work_struct *work);
516 int ipoib_pkey_dev_delay_open(struct net_device *dev);
517 void ipoib_drain_cq(struct net_device *dev);
519 void ipoib_set_ethtool_ops(struct net_device *dev);
520 int ipoib_set_dev_features(struct ipoib_dev_priv *priv, struct ib_device *hca);
522 #ifdef CONFIG_INFINIBAND_IPOIB_CM
524 #define IPOIB_FLAGS_RC 0x80
525 #define IPOIB_FLAGS_UC 0x40
527 /* We don't support UC connections at the moment */
528 #define IPOIB_CM_SUPPORTED(ha) (ha[0] & (IPOIB_FLAGS_RC))
530 extern int ipoib_max_conn_qp;
532 static inline int ipoib_cm_admin_enabled(struct net_device *dev)
534 struct ipoib_dev_priv *priv = netdev_priv(dev);
535 return IPOIB_CM_SUPPORTED(dev->dev_addr) &&
536 test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
539 static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
541 struct ipoib_dev_priv *priv = netdev_priv(dev);
542 return IPOIB_CM_SUPPORTED(hwaddr) &&
543 test_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
546 static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
549 return test_bit(IPOIB_FLAG_OPER_UP, &neigh->cm->flags);
552 static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
557 static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
562 static inline int ipoib_cm_has_srq(struct net_device *dev)
564 struct ipoib_dev_priv *priv = netdev_priv(dev);
565 return !!priv->cm.srq;
568 static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
570 struct ipoib_dev_priv *priv = netdev_priv(dev);
571 return priv->cm.max_cm_mtu;
574 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx);
575 int ipoib_cm_dev_open(struct net_device *dev);
576 void ipoib_cm_dev_stop(struct net_device *dev);
577 int ipoib_cm_dev_init(struct net_device *dev);
578 int ipoib_cm_add_mode_attr(struct net_device *dev);
579 void ipoib_cm_dev_cleanup(struct net_device *dev);
580 struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
581 struct ipoib_neigh *neigh);
582 void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx);
583 void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
585 void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc);
586 void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc);
591 #define ipoib_max_conn_qp 0
593 static inline int ipoib_cm_admin_enabled(struct net_device *dev)
597 static inline int ipoib_cm_enabled(struct net_device *dev, u8 *hwaddr)
603 static inline int ipoib_cm_up(struct ipoib_neigh *neigh)
609 static inline struct ipoib_cm_tx *ipoib_cm_get(struct ipoib_neigh *neigh)
614 static inline void ipoib_cm_set(struct ipoib_neigh *neigh, struct ipoib_cm_tx *tx)
618 static inline int ipoib_cm_has_srq(struct net_device *dev)
623 static inline unsigned int ipoib_cm_max_mtu(struct net_device *dev)
629 void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx)
635 int ipoib_cm_dev_open(struct net_device *dev)
641 void ipoib_cm_dev_stop(struct net_device *dev)
647 int ipoib_cm_dev_init(struct net_device *dev)
653 void ipoib_cm_dev_cleanup(struct net_device *dev)
659 struct ipoib_cm_tx *ipoib_cm_create_tx(struct net_device *dev, struct ipoib_path *path,
660 struct ipoib_neigh *neigh)
666 void ipoib_cm_destroy_tx(struct ipoib_cm_tx *tx)
672 int ipoib_cm_add_mode_attr(struct net_device *dev)
677 static inline void ipoib_cm_skb_too_long(struct net_device *dev, struct sk_buff *skb,
680 dev_kfree_skb_any(skb);
683 static inline void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc)
687 static inline void ipoib_cm_handle_tx_wc(struct net_device *dev, struct ib_wc *wc)
692 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
693 void ipoib_create_debug_files(struct net_device *dev);
694 void ipoib_delete_debug_files(struct net_device *dev);
695 int ipoib_register_debugfs(void);
696 void ipoib_unregister_debugfs(void);
698 static inline void ipoib_create_debug_files(struct net_device *dev) { }
699 static inline void ipoib_delete_debug_files(struct net_device *dev) { }
700 static inline int ipoib_register_debugfs(void) { return 0; }
701 static inline void ipoib_unregister_debugfs(void) { }
704 #define ipoib_printk(level, priv, format, arg...) \
705 printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg)
706 #define ipoib_warn(priv, format, arg...) \
707 ipoib_printk(KERN_WARNING, priv, format , ## arg)
709 extern int ipoib_sendq_size;
710 extern int ipoib_recvq_size;
712 extern struct ib_sa_client ipoib_sa_client;
714 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
715 extern int ipoib_debug_level;
717 #define ipoib_dbg(priv, format, arg...) \
719 if (ipoib_debug_level > 0) \
720 ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
722 #define ipoib_dbg_mcast(priv, format, arg...) \
724 if (mcast_debug_level > 0) \
725 ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
727 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG */
728 #define ipoib_dbg(priv, format, arg...) \
729 do { (void) (priv); } while (0)
730 #define ipoib_dbg_mcast(priv, format, arg...) \
731 do { (void) (priv); } while (0)
732 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
734 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
735 #define ipoib_dbg_data(priv, format, arg...) \
737 if (data_debug_level > 0) \
738 ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
740 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
741 #define ipoib_dbg_data(priv, format, arg...) \
742 do { (void) (priv); } while (0)
743 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
745 #define IPOIB_QPN(ha) (be32_to_cpup((__be32 *) ha) & 0xffffff)
747 #endif /* _IPOIB_H */