drivers/infiniband/hw/qib/qib_verbs.h

   1 /*
   2  * Copyright (c) 2012, 2013 Intel Corporation.  All rights reserved.
   3  * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
   4  * Copyright (c) 2005, 2006 PathScale, 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
  35 #ifndef QIB_VERBS_H
  36 #define QIB_VERBS_H
  37
  38 #include <linux/types.h>
  39 #include <linux/spinlock.h>
  40 #include <linux/kernel.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/kref.h>
  43 #include <linux/workqueue.h>
  44 #include <linux/kthread.h>
  45 #include <linux/completion.h>
  46 #include <rdma/ib_pack.h>
  47 #include <rdma/ib_user_verbs.h>
  48 #include <rdma/ib_hdrs.h>
  49 #include <rdma/rdma_vt.h>
  50 #include <rdma/rdmavt_cq.h>
  51
  52 struct qib_ctxtdata;
  53 struct qib_pportdata;
  54 struct qib_devdata;
  55 struct qib_verbs_txreq;
  56
  57 #define QIB_MAX_RDMA_ATOMIC     16
  58 #define QIB_GUIDS_PER_PORT      5
  59 #define QIB_PSN_SHIFT           8
  60
  61 /*
  62  * Increment this value if any changes that break userspace ABI
  63  * compatibility are made.
  64  */
  65 #define QIB_UVERBS_ABI_VERSION       2
  66
  67 /* IB Performance Manager status values */
  68 #define IB_PMA_SAMPLE_STATUS_DONE       0x00
  69 #define IB_PMA_SAMPLE_STATUS_STARTED    0x01
  70 #define IB_PMA_SAMPLE_STATUS_RUNNING    0x02
  71
  72 /* Mandatory IB performance counter select values. */
  73 #define IB_PMA_PORT_XMIT_DATA   cpu_to_be16(0x0001)
  74 #define IB_PMA_PORT_RCV_DATA    cpu_to_be16(0x0002)
  75 #define IB_PMA_PORT_XMIT_PKTS   cpu_to_be16(0x0003)
  76 #define IB_PMA_PORT_RCV_PKTS    cpu_to_be16(0x0004)
  77 #define IB_PMA_PORT_XMIT_WAIT   cpu_to_be16(0x0005)
  78
  79 #define QIB_VENDOR_IPG          cpu_to_be16(0xFFA0)
  80
  81 /* XXX Should be defined in ib_verbs.h enum ib_port_cap_flags */
  82 #define IB_PORT_OTHER_LOCAL_CHANGES_SUP (1 << 26)
  83
  84 #define IB_DEFAULT_GID_PREFIX   cpu_to_be64(0xfe80000000000000ULL)
  85
  86 /* Values for set/get portinfo VLCap OperationalVLs */
  87 #define IB_VL_VL0       1
  88 #define IB_VL_VL0_1     2
  89 #define IB_VL_VL0_3     3
  90 #define IB_VL_VL0_7     4
  91 #define IB_VL_VL0_14    5
  92
  93 static inline int qib_num_vls(int vls)
  94 {
  95         switch (vls) {
  96         default:
  97         case IB_VL_VL0:
  98                 return 1;
  99         case IB_VL_VL0_1:
 100                 return 2;
 101         case IB_VL_VL0_3:
 102                 return 4;
 103         case IB_VL_VL0_7:
 104                 return 8;
 105         case IB_VL_VL0_14:
 106                 return 15;
 107         }
 108 }
 109
 110 struct qib_pio_header {
 111         __le32 pbc[2];
 112         struct ib_header hdr;
 113 } __packed;
 114
 115 /*
 116  * qib specific data structure that will be hidden from rvt after the queue pair
 117  * is made common.
 118  */
 119 struct qib_qp_priv {
 120         struct ib_header *s_hdr;        /* next packet header to send */
 121         struct list_head iowait;        /* link for wait PIO buf */
 122         atomic_t s_dma_busy;
 123         struct qib_verbs_txreq *s_tx;
 124         struct work_struct s_work;
 125         wait_queue_head_t wait_dma;
 126         struct rvt_qp *owner;
 127 };
 128
 129 #define QIB_PSN_CREDIT  16
 130
 131 struct qib_opcode_stats {
 132         u64 n_packets;          /* number of packets */
 133         u64 n_bytes;            /* total number of bytes */
 134 };
 135
 136 struct qib_opcode_stats_perctx {
 137         struct qib_opcode_stats stats[128];
 138 };
 139
 140 struct qib_pma_counters {
 141         u64 n_unicast_xmit;     /* total unicast packets sent */
 142         u64 n_unicast_rcv;      /* total unicast packets received */
 143         u64 n_multicast_xmit;   /* total multicast packets sent */
 144         u64 n_multicast_rcv;    /* total multicast packets received */
 145 };
 146
 147 struct qib_ibport {
 148         struct rvt_ibport rvp;
 149         struct rvt_ah *smi_ah;
 150         __be64 guids[QIB_GUIDS_PER_PORT - 1];   /* writable GUIDs */
 151         struct qib_pma_counters __percpu *pmastats;
 152         u64 z_unicast_xmit;     /* starting count for PMA */
 153         u64 z_unicast_rcv;      /* starting count for PMA */
 154         u64 z_multicast_xmit;   /* starting count for PMA */
 155         u64 z_multicast_rcv;    /* starting count for PMA */
 156         u64 z_symbol_error_counter;             /* starting count for PMA */
 157         u64 z_link_error_recovery_counter;      /* starting count for PMA */
 158         u64 z_link_downed_counter;              /* starting count for PMA */
 159         u64 z_port_rcv_errors;                  /* starting count for PMA */
 160         u64 z_port_rcv_remphys_errors;          /* starting count for PMA */
 161         u64 z_port_xmit_discards;               /* starting count for PMA */
 162         u64 z_port_xmit_data;                   /* starting count for PMA */
 163         u64 z_port_rcv_data;                    /* starting count for PMA */
 164         u64 z_port_xmit_packets;                /* starting count for PMA */
 165         u64 z_port_rcv_packets;                 /* starting count for PMA */
 166         u32 z_local_link_integrity_errors;      /* starting count for PMA */
 167         u32 z_excessive_buffer_overrun_errors;  /* starting count for PMA */
 168         u32 z_vl15_dropped;                     /* starting count for PMA */
 169         u8 sl_to_vl[16];
 170 };
 171
 172 struct qib_ibdev {
 173         struct rvt_dev_info rdi;
 174
 175         struct list_head piowait;       /* list for wait PIO buf */
 176         struct list_head dmawait;       /* list for wait DMA */
 177         struct list_head txwait;        /* list for wait qib_verbs_txreq */
 178         struct list_head memwait;       /* list for wait kernel memory */
 179         struct list_head txreq_free;
 180         struct timer_list mem_timer;
 181         struct qib_pio_header *pio_hdrs;
 182         dma_addr_t pio_hdrs_phys;
 183         u32 qp_rnd; /* random bytes for hash */
 184
 185         u32 n_piowait;
 186         u32 n_txwait;
 187
 188 #ifdef CONFIG_DEBUG_FS
 189         /* per HCA debugfs */
 190         struct dentry *qib_ibdev_dbg;
 191 #endif
 192 };
 193
 194 struct qib_verbs_counters {
 195         u64 symbol_error_counter;
 196         u64 link_error_recovery_counter;
 197         u64 link_downed_counter;
 198         u64 port_rcv_errors;
 199         u64 port_rcv_remphys_errors;
 200         u64 port_xmit_discards;
 201         u64 port_xmit_data;
 202         u64 port_rcv_data;
 203         u64 port_xmit_packets;
 204         u64 port_rcv_packets;
 205         u32 local_link_integrity_errors;
 206         u32 excessive_buffer_overrun_errors;
 207         u32 vl15_dropped;
 208 };
 209
 210 static inline struct qib_ibdev *to_idev(struct ib_device *ibdev)
 211 {
 212         struct rvt_dev_info *rdi;
 213
 214         rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
 215         return container_of(rdi, struct qib_ibdev, rdi);
 216 }
 217
 218 /*
 219  * Send if not busy or waiting for I/O and either
 220  * a RC response is pending or we can process send work requests.
 221  */
 222 static inline int qib_send_ok(struct rvt_qp *qp)
 223 {
 224         return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) &&
 225                 (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) ||
 226                  !(qp->s_flags & RVT_S_ANY_WAIT_SEND));
 227 }
 228
 229 void _qib_schedule_send(struct rvt_qp *qp);
 230 void qib_schedule_send(struct rvt_qp *qp);
 231
 232 static inline int qib_pkey_ok(u16 pkey1, u16 pkey2)
 233 {
 234         u16 p1 = pkey1 & 0x7FFF;
 235         u16 p2 = pkey2 & 0x7FFF;
 236
 237         /*
 238          * Low 15 bits must be non-zero and match, and
 239          * one of the two must be a full member.
 240          */
 241         return p1 && p1 == p2 && ((__s16)pkey1 < 0 || (__s16)pkey2 < 0);
 242 }
 243
 244 void qib_bad_pqkey(struct qib_ibport *ibp, __be16 trap_num, u32 key, u32 sl,
 245                    u32 qp1, u32 qp2, __be16 lid1, __be16 lid2);
 246 void qib_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
 247 void qib_sys_guid_chg(struct qib_ibport *ibp);
 248 void qib_node_desc_chg(struct qib_ibport *ibp);
 249 int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 250                     const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 251                     const struct ib_mad_hdr *in, size_t in_mad_size,
 252                     struct ib_mad_hdr *out, size_t *out_mad_size,
 253                     u16 *out_mad_pkey_index);
 254 void qib_notify_create_mad_agent(struct rvt_dev_info *rdi, int port_idx);
 255 void qib_notify_free_mad_agent(struct rvt_dev_info *rdi, int port_idx);
 256
 257 /*
 258  * Compare the lower 24 bits of the two values.
 259  * Returns an integer <, ==, or > than zero.
 260  */
 261 static inline int qib_cmp24(u32 a, u32 b)
 262 {
 263         return (((int) a) - ((int) b)) << 8;
 264 }
 265
 266 int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords,
 267                           u64 *rwords, u64 *spkts, u64 *rpkts,
 268                           u64 *xmit_wait);
 269
 270 int qib_get_counters(struct qib_pportdata *ppd,
 271                      struct qib_verbs_counters *cntrs);
 272
 273 /*
 274  * Functions provided by qib driver for rdmavt to use
 275  */
 276 unsigned qib_free_all_qps(struct rvt_dev_info *rdi);
 277 void *qib_qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 278 void qib_qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 279 void qib_notify_qp_reset(struct rvt_qp *qp);
 280 int qib_alloc_qpn(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt,
 281                   enum ib_qp_type type, u8 port);
 282 void qib_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
 283 #ifdef CONFIG_DEBUG_FS
 284
 285 struct qib_qp_iter;
 286
 287 struct qib_qp_iter *qib_qp_iter_init(struct qib_ibdev *dev);
 288
 289 int qib_qp_iter_next(struct qib_qp_iter *iter);
 290
 291 void qib_qp_iter_print(struct seq_file *s, struct qib_qp_iter *iter);
 292
 293 #endif
 294
 295 unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult);
 296
 297 void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail);
 298
 299 void qib_put_txreq(struct qib_verbs_txreq *tx);
 300
 301 int qib_verbs_send(struct rvt_qp *qp, struct ib_header *hdr,
 302                    u32 hdrwords, struct rvt_sge_state *ss, u32 len);
 303
 304 void qib_copy_sge(struct rvt_sge_state *ss, void *data, u32 length,
 305                   int release);
 306
 307 void qib_uc_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
 308                 int has_grh, void *data, u32 tlen, struct rvt_qp *qp);
 309
 310 void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
 311                 int has_grh, void *data, u32 tlen, struct rvt_qp *qp);
 312
 313 int qib_check_ah(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
 314
 315 int qib_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe);
 316
 317 struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid);
 318
 319 void qib_rc_rnr_retry(unsigned long arg);
 320
 321 void qib_rc_send_complete(struct rvt_qp *qp, struct ib_header *hdr);
 322
 323 int qib_post_ud_send(struct rvt_qp *qp, struct ib_send_wr *wr);
 324
 325 void qib_ud_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
 326                 int has_grh, void *data, u32 tlen, struct rvt_qp *qp);
 327
 328 void mr_rcu_callback(struct rcu_head *list);
 329
 330 int qib_get_rwqe(struct rvt_qp *qp, int wr_id_only);
 331
 332 void qib_migrate_qp(struct rvt_qp *qp);
 333
 334 int qib_ruc_check_hdr(struct qib_ibport *ibp, struct ib_header *hdr,
 335                       int has_grh, struct rvt_qp *qp, u32 bth0);
 336
 337 u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr,
 338                  const struct ib_global_route *grh, u32 hwords, u32 nwords);
 339
 340 void qib_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
 341                          u32 bth0, u32 bth2);
 342
 343 void _qib_do_send(struct work_struct *work);
 344
 345 void qib_do_send(struct rvt_qp *qp);
 346
 347 void qib_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
 348                        enum ib_wc_status status);
 349
 350 void qib_send_rc_ack(struct rvt_qp *qp);
 351
 352 int qib_make_rc_req(struct rvt_qp *qp, unsigned long *flags);
 353
 354 int qib_make_uc_req(struct rvt_qp *qp, unsigned long *flags);
 355
 356 int qib_make_ud_req(struct rvt_qp *qp, unsigned long *flags);
 357
 358 int qib_register_ib_device(struct qib_devdata *);
 359
 360 void qib_unregister_ib_device(struct qib_devdata *);
 361
 362 void qib_ib_rcv(struct qib_ctxtdata *, void *, void *, u32);
 363
 364 void qib_ib_piobufavail(struct qib_devdata *);
 365
 366 unsigned qib_get_npkeys(struct qib_devdata *);
 367
 368 unsigned qib_get_pkey(struct qib_ibport *, unsigned);
 369
 370 extern const enum ib_wc_opcode ib_qib_wc_opcode[];
 371
 372 /*
 373  * Below  HCA-independent IB PhysPortState values, returned
 374  * by the f_ibphys_portstate() routine.
 375  */
 376 #define IB_PHYSPORTSTATE_SLEEP 1
 377 #define IB_PHYSPORTSTATE_POLL 2
 378 #define IB_PHYSPORTSTATE_DISABLED 3
 379 #define IB_PHYSPORTSTATE_CFG_TRAIN 4
 380 #define IB_PHYSPORTSTATE_LINKUP 5
 381 #define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6
 382 #define IB_PHYSPORTSTATE_CFG_DEBOUNCE 8
 383 #define IB_PHYSPORTSTATE_CFG_IDLE 0xB
 384 #define IB_PHYSPORTSTATE_RECOVERY_RETRAIN 0xC
 385 #define IB_PHYSPORTSTATE_RECOVERY_WAITRMT 0xE
 386 #define IB_PHYSPORTSTATE_RECOVERY_IDLE 0xF
 387 #define IB_PHYSPORTSTATE_CFG_ENH 0x10
 388 #define IB_PHYSPORTSTATE_CFG_WAIT_ENH 0x13
 389
 390 extern const int ib_rvt_state_ops[];
 391
 392 extern __be64 ib_qib_sys_image_guid;    /* in network order */
 393
 394 extern unsigned int ib_rvt_lkey_table_size;
 395
 396 extern unsigned int ib_qib_max_cqes;
 397
 398 extern unsigned int ib_qib_max_cqs;
 399
 400 extern unsigned int ib_qib_max_qp_wrs;
 401
 402 extern unsigned int ib_qib_max_qps;
 403
 404 extern unsigned int ib_qib_max_sges;
 405
 406 extern unsigned int ib_qib_max_mcast_grps;
 407
 408 extern unsigned int ib_qib_max_mcast_qp_attached;
 409
 410 extern unsigned int ib_qib_max_srqs;
 411
 412 extern unsigned int ib_qib_max_srq_sges;
 413
 414 extern unsigned int ib_qib_max_srq_wrs;
 415
 416 extern const u32 ib_qib_rnr_table[];
 417
 418 extern const struct rvt_operation_params qib_post_parms[];
 419
 420 #endif                          /* QIB_VERBS_H */