drivers/infiniband/ulp/ipoib/ipoib.h

   1 /*
   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.
   5  *
   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:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  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.
  24  *
  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
  32  * SOFTWARE.
  33  *
  34  * $Id: ipoib.h 1358 2004-12-17 22:00:11Z roland $
  35  */
  36
  37 #ifndef _IPOIB_H
  38 #define _IPOIB_H
  39
  40 #include <linux/list.h>
  41 #include <linux/skbuff.h>
  42 #include <linux/netdevice.h>
  43 #include <linux/workqueue.h>
  44 #include <linux/pci.h>
  45 #include <linux/config.h>
  46 #include <linux/kref.h>
  47 #include <linux/if_infiniband.h>
  48
  49 #include <net/neighbour.h>
  50
  51 #include <asm/atomic.h>
  52 #include <asm/semaphore.h>
  53
  54 #include <rdma/ib_verbs.h>
  55 #include <rdma/ib_pack.h>
  56 #include <rdma/ib_sa.h>
  57
  58 /* constants */
  59
  60 enum {
  61         IPOIB_PACKET_SIZE         = 2048,
  62         IPOIB_BUF_SIZE            = IPOIB_PACKET_SIZE + IB_GRH_BYTES,
  63
  64         IPOIB_ENCAP_LEN           = 4,
  65
  66         IPOIB_RX_RING_SIZE        = 128,
  67         IPOIB_TX_RING_SIZE        = 64,
  68
  69         IPOIB_NUM_WC              = 4,
  70
  71         IPOIB_MAX_PATH_REC_QUEUE  = 3,
  72         IPOIB_MAX_MCAST_QUEUE     = 3,
  73
  74         IPOIB_FLAG_OPER_UP        = 0,
  75         IPOIB_FLAG_ADMIN_UP       = 1,
  76         IPOIB_PKEY_ASSIGNED       = 2,
  77         IPOIB_PKEY_STOP           = 3,
  78         IPOIB_FLAG_SUBINTERFACE   = 4,
  79         IPOIB_MCAST_RUN           = 5,
  80         IPOIB_STOP_REAPER         = 6,
  81
  82         IPOIB_MAX_BACKOFF_SECONDS = 16,
  83
  84         IPOIB_MCAST_FLAG_FOUND    = 0,  /* used in set_multicast_list */
  85         IPOIB_MCAST_FLAG_SENDONLY = 1,
  86         IPOIB_MCAST_FLAG_BUSY     = 2,  /* joining or already joined */
  87         IPOIB_MCAST_FLAG_ATTACHED = 3,
  88 };
  89
  90 /* structs */
  91
  92 struct ipoib_header {
  93         __be16  proto;
  94         u16     reserved;
  95 };
  96
  97 struct ipoib_pseudoheader {
  98         u8  hwaddr[INFINIBAND_ALEN];
  99 };
 100
 101 struct ipoib_mcast;
 102
 103 struct ipoib_rx_buf {
 104         struct sk_buff *skb;
 105         dma_addr_t      mapping;
 106 };
 107
 108 struct ipoib_tx_buf {
 109         struct sk_buff *skb;
 110         DECLARE_PCI_UNMAP_ADDR(mapping)
 111 };
 112
 113 /*
 114  * Device private locking: tx_lock protects members used in TX fast
 115  * path (and we use LLTX so upper layers don't do extra locking).
 116  * lock protects everything else.  lock nests inside of tx_lock (ie
 117  * tx_lock must be acquired first if needed).
 118  */
 119 struct ipoib_dev_priv {
 120         spinlock_t lock;
 121
 122         struct net_device *dev;
 123
 124         unsigned long flags;
 125
 126         struct semaphore mcast_mutex;
 127         struct semaphore vlan_mutex;
 128
 129         struct rb_root  path_tree;
 130         struct list_head path_list;
 131
 132         struct ipoib_mcast *broadcast;
 133         struct list_head multicast_list;
 134         struct rb_root multicast_tree;
 135
 136         struct work_struct pkey_task;
 137         struct work_struct mcast_task;
 138         struct work_struct flush_task;
 139         struct work_struct restart_task;
 140         struct work_struct ah_reap_task;
 141
 142         struct ib_device *ca;
 143         u8                port;
 144         u16               pkey;
 145         struct ib_pd     *pd;
 146         struct ib_mr     *mr;
 147         struct ib_cq     *cq;
 148         struct ib_qp     *qp;
 149         u32               qkey;
 150
 151         union ib_gid local_gid;
 152         u16          local_lid;
 153         u8           local_rate;
 154
 155         unsigned int admin_mtu;
 156         unsigned int mcast_mtu;
 157
 158         struct ipoib_rx_buf *rx_ring;
 159
 160         spinlock_t           tx_lock;
 161         struct ipoib_tx_buf *tx_ring;
 162         unsigned             tx_head;
 163         unsigned             tx_tail;
 164         struct ib_sge        tx_sge;
 165         struct ib_send_wr    tx_wr;
 166
 167         struct ib_wc ibwc[IPOIB_NUM_WC];
 168
 169         struct list_head dead_ahs;
 170
 171         struct ib_event_handler event_handler;
 172
 173         struct net_device_stats stats;
 174
 175         struct net_device *parent;
 176         struct list_head child_intfs;
 177         struct list_head list;
 178
 179 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
 180         struct list_head fs_list;
 181         struct dentry *mcg_dentry;
 182 #endif
 183 };
 184
 185 struct ipoib_ah {
 186         struct net_device *dev;
 187         struct ib_ah      *ah;
 188         struct list_head   list;
 189         struct kref        ref;
 190         unsigned           last_send;
 191 };
 192
 193 struct ipoib_path {
 194         struct net_device    *dev;
 195         struct ib_sa_path_rec pathrec;
 196         struct ipoib_ah      *ah;
 197         struct sk_buff_head   queue;
 198
 199         struct list_head      neigh_list;
 200
 201         int                   query_id;
 202         struct ib_sa_query   *query;
 203         struct completion     done;
 204
 205         struct rb_node        rb_node;
 206         struct list_head      list;
 207 };
 208
 209 struct ipoib_neigh {
 210         struct ipoib_ah    *ah;
 211         struct sk_buff_head queue;
 212
 213         struct neighbour   *neighbour;
 214
 215         struct list_head    list;
 216 };
 217
 218 static inline struct ipoib_neigh **to_ipoib_neigh(struct neighbour *neigh)
 219 {
 220         return (struct ipoib_neigh **) (neigh->ha + 24 -
 221                                         (offsetof(struct neighbour, ha) & 4));
 222 }
 223
 224 extern struct workqueue_struct *ipoib_workqueue;
 225
 226 /* functions */
 227
 228 void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr);
 229
 230 struct ipoib_ah *ipoib_create_ah(struct net_device *dev,
 231                                  struct ib_pd *pd, struct ib_ah_attr *attr);
 232 void ipoib_free_ah(struct kref *kref);
 233 static inline void ipoib_put_ah(struct ipoib_ah *ah)
 234 {
 235         kref_put(&ah->ref, ipoib_free_ah);
 236 }
 237
 238 int ipoib_open(struct net_device *dev);
 239 int ipoib_add_pkey_attr(struct net_device *dev);
 240
 241 void ipoib_send(struct net_device *dev, struct sk_buff *skb,
 242                 struct ipoib_ah *address, u32 qpn);
 243 void ipoib_reap_ah(void *dev_ptr);
 244
 245 void ipoib_flush_paths(struct net_device *dev);
 246 struct ipoib_dev_priv *ipoib_intf_alloc(const char *format);
 247
 248 int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
 249 void ipoib_ib_dev_flush(void *dev);
 250 void ipoib_ib_dev_cleanup(struct net_device *dev);
 251
 252 int ipoib_ib_dev_open(struct net_device *dev);
 253 int ipoib_ib_dev_up(struct net_device *dev);
 254 int ipoib_ib_dev_down(struct net_device *dev);
 255 int ipoib_ib_dev_stop(struct net_device *dev);
 256
 257 int ipoib_dev_init(struct net_device *dev, struct ib_device *ca, int port);
 258 void ipoib_dev_cleanup(struct net_device *dev);
 259
 260 void ipoib_mcast_join_task(void *dev_ptr);
 261 void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid,
 262                       struct sk_buff *skb);
 263
 264 void ipoib_mcast_restart_task(void *dev_ptr);
 265 int ipoib_mcast_start_thread(struct net_device *dev);
 266 int ipoib_mcast_stop_thread(struct net_device *dev, int flush);
 267
 268 void ipoib_mcast_dev_down(struct net_device *dev);
 269 void ipoib_mcast_dev_flush(struct net_device *dev);
 270
 271 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
 272 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev);
 273 void ipoib_mcast_iter_free(struct ipoib_mcast_iter *iter);
 274 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter);
 275 void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
 276                                   union ib_gid *gid,
 277                                   unsigned long *created,
 278                                   unsigned int *queuelen,
 279                                   unsigned int *complete,
 280                                   unsigned int *send_only);
 281 #endif
 282
 283 int ipoib_mcast_attach(struct net_device *dev, u16 mlid,
 284                        union ib_gid *mgid);
 285 int ipoib_mcast_detach(struct net_device *dev, u16 mlid,
 286                        union ib_gid *mgid);
 287
 288 int ipoib_init_qp(struct net_device *dev);
 289 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca);
 290 void ipoib_transport_dev_cleanup(struct net_device *dev);
 291
 292 void ipoib_event(struct ib_event_handler *handler,
 293                  struct ib_event *record);
 294
 295 int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey);
 296 int ipoib_vlan_delete(struct net_device *pdev, unsigned short pkey);
 297
 298 void ipoib_pkey_poll(void *dev);
 299 int ipoib_pkey_dev_delay_open(struct net_device *dev);
 300
 301 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
 302 int ipoib_create_debug_file(struct net_device *dev);
 303 void ipoib_delete_debug_file(struct net_device *dev);
 304 int ipoib_register_debugfs(void);
 305 void ipoib_unregister_debugfs(void);
 306 #else
 307 static inline int ipoib_create_debug_file(struct net_device *dev) { return 0; }
 308 static inline void ipoib_delete_debug_file(struct net_device *dev) { }
 309 static inline int ipoib_register_debugfs(void) { return 0; }
 310 static inline void ipoib_unregister_debugfs(void) { }
 311 #endif
 312
 313
 314 #define ipoib_printk(level, priv, format, arg...)       \
 315         printk(level "%s: " format, ((struct ipoib_dev_priv *) priv)->dev->name , ## arg)
 316 #define ipoib_warn(priv, format, arg...)                \
 317         ipoib_printk(KERN_WARNING, priv, format , ## arg)
 318
 319
 320 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
 321 extern int ipoib_debug_level;
 322
 323 #define ipoib_dbg(priv, format, arg...)                 \
 324         do {                                            \
 325                 if (ipoib_debug_level > 0)                      \
 326                         ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
 327         } while (0)
 328 #define ipoib_dbg_mcast(priv, format, arg...)           \
 329         do {                                            \
 330                 if (mcast_debug_level > 0)              \
 331                         ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
 332         } while (0)
 333 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG */
 334 #define ipoib_dbg(priv, format, arg...)                 \
 335         do { (void) (priv); } while (0)
 336 #define ipoib_dbg_mcast(priv, format, arg...)           \
 337         do { (void) (priv); } while (0)
 338 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */
 339
 340 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA
 341 #define ipoib_dbg_data(priv, format, arg...)            \
 342         do {                                            \
 343                 if (data_debug_level > 0)               \
 344                         ipoib_printk(KERN_DEBUG, priv, format , ## arg); \
 345         } while (0)
 346 #else /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
 347 #define ipoib_dbg_data(priv, format, arg...)            \
 348         do { (void) (priv); } while (0)
 349 #endif /* CONFIG_INFINIBAND_IPOIB_DEBUG_DATA */
 350
 351
 352 #define IPOIB_GID_FMT           "%x:%x:%x:%x:%x:%x:%x:%x"
 353
 354 #define IPOIB_GID_ARG(gid)      be16_to_cpup((__be16 *) ((gid).raw +  0)), \
 355                                 be16_to_cpup((__be16 *) ((gid).raw +  2)), \
 356                                 be16_to_cpup((__be16 *) ((gid).raw +  4)), \
 357                                 be16_to_cpup((__be16 *) ((gid).raw +  6)), \
 358                                 be16_to_cpup((__be16 *) ((gid).raw +  8)), \
 359                                 be16_to_cpup((__be16 *) ((gid).raw + 10)), \
 360                                 be16_to_cpup((__be16 *) ((gid).raw + 12)), \
 361                                 be16_to_cpup((__be16 *) ((gid).raw + 14))
 362
 363 #endif /* _IPOIB_H */