LXR linux/drivers/infiniband/hw/qib/qib

   1/*
   2 * Copyright (c) 2012 - 2017 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
  52struct qib_ctxtdata;
  53struct qib_pportdata;
  54struct qib_devdata;
  55struct 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
  93static 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
 110struct 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 */
 119struct 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
 131struct qib_opcode_stats {
 132        u64 n_packets;          /* number of packets */
 133        u64 n_bytes;            /* total number of bytes */
 134};
 135
 136struct qib_opcode_stats_perctx {
 137        struct qib_opcode_stats stats[128];
 138};
 139
 140struct 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
 147struct 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
 172struct 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
 194struct 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
 210static 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 */
 222static 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
 229void _qib_schedule_send(struct rvt_qp *qp);
 230void qib_schedule_send(struct rvt_qp *qp);
 231
 232static 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
 244void qib_bad_pkey(struct qib_ibport *ibp, u32 key, u32 sl,
 245                  u32 qp1, u32 qp2, __be16 lid1, __be16 lid2);
 246void qib_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
 247void qib_sys_guid_chg(struct qib_ibport *ibp);
 248void qib_node_desc_chg(struct qib_ibport *ibp);
 249int 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);
 254void qib_notify_create_mad_agent(struct rvt_dev_info *rdi, int port_idx);
 255void 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 */
 261static inline int qib_cmp24(u32 a, u32 b)
 262{
 263        return (((int) a) - ((int) b)) << 8;
 264}
 265
 266int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords,
 267                          u64 *rwords, u64 *spkts, u64 *rpkts,
 268                          u64 *xmit_wait);
 269
 270int 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 */
 276unsigned qib_free_all_qps(struct rvt_dev_info *rdi);
 277void *qib_qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 278void qib_qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 279void qib_notify_qp_reset(struct rvt_qp *qp);
 280int qib_alloc_qpn(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt,
 281                  enum ib_qp_type type, u8 port);
 282void qib_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
 283#ifdef CONFIG_DEBUG_FS
 284
 285void qib_qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter);
 286
 287#endif
 288
 289unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult);
 290
 291void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail);
 292
 293void qib_put_txreq(struct qib_verbs_txreq *tx);
 294
 295int qib_verbs_send(struct rvt_qp *qp, struct ib_header *hdr,
 296                   u32 hdrwords, struct rvt_sge_state *ss, u32 len);
 297
 298void qib_copy_sge(struct rvt_sge_state *ss, void *data, u32 length,
 299                  int release);
 300
 301void qib_uc_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
 302                int has_grh, void *data, u32 tlen, struct rvt_qp *qp);
 303
 304void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
 305                int has_grh, void *data, u32 tlen, struct rvt_qp *qp);
 306
 307int qib_check_ah(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
 308
 309int qib_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe);
 310
 311struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid);
 312
 313void qib_rc_rnr_retry(unsigned long arg);
 314
 315void qib_rc_send_complete(struct rvt_qp *qp, struct ib_header *hdr);
 316
 317int qib_post_ud_send(struct rvt_qp *qp, struct ib_send_wr *wr);
 318
 319void qib_ud_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
 320                int has_grh, void *data, u32 tlen, struct rvt_qp *qp);
 321
 322void mr_rcu_callback(struct rcu_head *list);
 323
 324int qib_get_rwqe(struct rvt_qp *qp, int wr_id_only);
 325
 326void qib_migrate_qp(struct rvt_qp *qp);
 327
 328int qib_ruc_check_hdr(struct qib_ibport *ibp, struct ib_header *hdr,
 329                      int has_grh, struct rvt_qp *qp, u32 bth0);
 330
 331u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr,
 332                 const struct ib_global_route *grh, u32 hwords, u32 nwords);
 333
 334void qib_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
 335                         u32 bth0, u32 bth2);
 336
 337void _qib_do_send(struct work_struct *work);
 338
 339void qib_do_send(struct rvt_qp *qp);
 340
 341void qib_send_complete(struct rvt_qp *qp, struct rvt_swqe *wqe,
 342                       enum ib_wc_status status);
 343
 344void qib_send_rc_ack(struct rvt_qp *qp);
 345
 346int qib_make_rc_req(struct rvt_qp *qp, unsigned long *flags);
 347
 348int qib_make_uc_req(struct rvt_qp *qp, unsigned long *flags);
 349
 350int qib_make_ud_req(struct rvt_qp *qp, unsigned long *flags);
 351
 352int qib_register_ib_device(struct qib_devdata *);
 353
 354void qib_unregister_ib_device(struct qib_devdata *);
 355
 356void qib_ib_rcv(struct qib_ctxtdata *, void *, void *, u32);
 357
 358void qib_ib_piobufavail(struct qib_devdata *);
 359
 360unsigned qib_get_npkeys(struct qib_devdata *);
 361
 362unsigned qib_get_pkey(struct qib_ibport *, unsigned);
 363
 364extern const enum ib_wc_opcode ib_qib_wc_opcode[];
 365
 366/*
 367 * Below  HCA-independent IB PhysPortState values, returned
 368 * by the f_ibphys_portstate() routine.
 369 */
 370#define IB_PHYSPORTSTATE_SLEEP 1
 371#define IB_PHYSPORTSTATE_POLL 2
 372#define IB_PHYSPORTSTATE_DISABLED 3
 373#define IB_PHYSPORTSTATE_CFG_TRAIN 4
 374#define IB_PHYSPORTSTATE_LINKUP 5
 375#define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6
 376#define IB_PHYSPORTSTATE_CFG_DEBOUNCE 8
 377#define IB_PHYSPORTSTATE_CFG_IDLE 0xB
 378#define IB_PHYSPORTSTATE_RECOVERY_RETRAIN 0xC
 379#define IB_PHYSPORTSTATE_RECOVERY_WAITRMT 0xE
 380#define IB_PHYSPORTSTATE_RECOVERY_IDLE 0xF
 381#define IB_PHYSPORTSTATE_CFG_ENH 0x10
 382#define IB_PHYSPORTSTATE_CFG_WAIT_ENH 0x13
 383
 384extern const int ib_rvt_state_ops[];
 385
 386extern __be64 ib_qib_sys_image_guid;    /* in network order */
 387
 388extern unsigned int ib_rvt_lkey_table_size;
 389
 390extern unsigned int ib_qib_max_cqes;
 391
 392extern unsigned int ib_qib_max_cqs;
 393
 394extern unsigned int ib_qib_max_qp_wrs;
 395
 396extern unsigned int ib_qib_max_qps;
 397
 398extern unsigned int ib_qib_max_sges;
 399
 400extern unsigned int ib_qib_max_mcast_grps;
 401
 402extern unsigned int ib_qib_max_mcast_qp_attached;
 403
 404extern unsigned int ib_qib_max_srqs;
 405
 406extern unsigned int ib_qib_max_srq_sges;
 407
 408extern unsigned int ib_qib_max_srq_wrs;
 409
 410extern const u32 ib_qib_rnr_table[];
 411
 412extern const struct rvt_operation_params qib_post_parms[];
 413
 414#endif                          /* QIB_VERBS_H */
 415