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

   1/*
   2 * Copyright (c) 2012 - 2018 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/rdmavt_qp.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#define IB_DEFAULT_GID_PREFIX   cpu_to_be64(0xfe80000000000000ULL)
  82
  83/* Values for set/get portinfo VLCap OperationalVLs */
  84#define IB_VL_VL0       1
  85#define IB_VL_VL0_1     2
  86#define IB_VL_VL0_3     3
  87#define IB_VL_VL0_7     4
  88#define IB_VL_VL0_14    5
  89
  90static inline int qib_num_vls(int vls)
  91{
  92        switch (vls) {
  93        default:
  94        case IB_VL_VL0:
  95                return 1;
  96        case IB_VL_VL0_1:
  97                return 2;
  98        case IB_VL_VL0_3:
  99                return 4;
 100        case IB_VL_VL0_7:
 101                return 8;
 102        case IB_VL_VL0_14:
 103                return 15;
 104        }
 105}
 106
 107struct qib_pio_header {
 108        __le32 pbc[2];
 109        struct ib_header hdr;
 110} __packed;
 111
 112/*
 113 * qib specific data structure that will be hidden from rvt after the queue pair
 114 * is made common.
 115 */
 116struct qib_qp_priv {
 117        struct ib_header *s_hdr;        /* next packet header to send */
 118        struct list_head iowait;        /* link for wait PIO buf */
 119        atomic_t s_dma_busy;
 120        struct qib_verbs_txreq *s_tx;
 121        struct work_struct s_work;
 122        wait_queue_head_t wait_dma;
 123        struct rvt_qp *owner;
 124};
 125
 126#define QIB_PSN_CREDIT  16
 127
 128struct qib_opcode_stats {
 129        u64 n_packets;          /* number of packets */
 130        u64 n_bytes;            /* total number of bytes */
 131};
 132
 133struct qib_opcode_stats_perctx {
 134        struct qib_opcode_stats stats[128];
 135};
 136
 137struct qib_pma_counters {
 138        u64 n_unicast_xmit;     /* total unicast packets sent */
 139        u64 n_unicast_rcv;      /* total unicast packets received */
 140        u64 n_multicast_xmit;   /* total multicast packets sent */
 141        u64 n_multicast_rcv;    /* total multicast packets received */
 142};
 143
 144struct qib_ibport {
 145        struct rvt_ibport rvp;
 146        struct rvt_ah *smi_ah;
 147        __be64 guids[QIB_GUIDS_PER_PORT - 1];   /* writable GUIDs */
 148        struct qib_pma_counters __percpu *pmastats;
 149        u64 z_unicast_xmit;     /* starting count for PMA */
 150        u64 z_unicast_rcv;      /* starting count for PMA */
 151        u64 z_multicast_xmit;   /* starting count for PMA */
 152        u64 z_multicast_rcv;    /* starting count for PMA */
 153        u64 z_symbol_error_counter;             /* starting count for PMA */
 154        u64 z_link_error_recovery_counter;      /* starting count for PMA */
 155        u64 z_link_downed_counter;              /* starting count for PMA */
 156        u64 z_port_rcv_errors;                  /* starting count for PMA */
 157        u64 z_port_rcv_remphys_errors;          /* starting count for PMA */
 158        u64 z_port_xmit_discards;               /* starting count for PMA */
 159        u64 z_port_xmit_data;                   /* starting count for PMA */
 160        u64 z_port_rcv_data;                    /* starting count for PMA */
 161        u64 z_port_xmit_packets;                /* starting count for PMA */
 162        u64 z_port_rcv_packets;                 /* starting count for PMA */
 163        u32 z_local_link_integrity_errors;      /* starting count for PMA */
 164        u32 z_excessive_buffer_overrun_errors;  /* starting count for PMA */
 165        u32 z_vl15_dropped;                     /* starting count for PMA */
 166        u8 sl_to_vl[16];
 167};
 168
 169struct qib_ibdev {
 170        struct rvt_dev_info rdi;
 171
 172        struct list_head piowait;       /* list for wait PIO buf */
 173        struct list_head dmawait;       /* list for wait DMA */
 174        struct list_head txwait;        /* list for wait qib_verbs_txreq */
 175        struct list_head memwait;       /* list for wait kernel memory */
 176        struct list_head txreq_free;
 177        struct timer_list mem_timer;
 178        struct qib_pio_header *pio_hdrs;
 179        dma_addr_t pio_hdrs_phys;
 180
 181        u32 n_piowait;
 182        u32 n_txwait;
 183
 184#ifdef CONFIG_DEBUG_FS
 185        /* per HCA debugfs */
 186        struct dentry *qib_ibdev_dbg;
 187#endif
 188};
 189
 190struct qib_verbs_counters {
 191        u64 symbol_error_counter;
 192        u64 link_error_recovery_counter;
 193        u64 link_downed_counter;
 194        u64 port_rcv_errors;
 195        u64 port_rcv_remphys_errors;
 196        u64 port_xmit_discards;
 197        u64 port_xmit_data;
 198        u64 port_rcv_data;
 199        u64 port_xmit_packets;
 200        u64 port_rcv_packets;
 201        u32 local_link_integrity_errors;
 202        u32 excessive_buffer_overrun_errors;
 203        u32 vl15_dropped;
 204};
 205
 206static inline struct qib_ibdev *to_idev(struct ib_device *ibdev)
 207{
 208        struct rvt_dev_info *rdi;
 209
 210        rdi = container_of(ibdev, struct rvt_dev_info, ibdev);
 211        return container_of(rdi, struct qib_ibdev, rdi);
 212}
 213
 214/*
 215 * Send if not busy or waiting for I/O and either
 216 * a RC response is pending or we can process send work requests.
 217 */
 218static inline int qib_send_ok(struct rvt_qp *qp)
 219{
 220        return !(qp->s_flags & (RVT_S_BUSY | RVT_S_ANY_WAIT_IO)) &&
 221                (qp->s_hdrwords || (qp->s_flags & RVT_S_RESP_PENDING) ||
 222                 !(qp->s_flags & RVT_S_ANY_WAIT_SEND));
 223}
 224
 225bool _qib_schedule_send(struct rvt_qp *qp);
 226bool qib_schedule_send(struct rvt_qp *qp);
 227
 228static inline int qib_pkey_ok(u16 pkey1, u16 pkey2)
 229{
 230        u16 p1 = pkey1 & 0x7FFF;
 231        u16 p2 = pkey2 & 0x7FFF;
 232
 233        /*
 234         * Low 15 bits must be non-zero and match, and
 235         * one of the two must be a full member.
 236         */
 237        return p1 && p1 == p2 && ((__s16)pkey1 < 0 || (__s16)pkey2 < 0);
 238}
 239
 240void qib_bad_pkey(struct qib_ibport *ibp, u32 key, u32 sl,
 241                  u32 qp1, u32 qp2, __be16 lid1, __be16 lid2);
 242void qib_cap_mask_chg(struct rvt_dev_info *rdi, u8 port_num);
 243void qib_sys_guid_chg(struct qib_ibport *ibp);
 244void qib_node_desc_chg(struct qib_ibport *ibp);
 245int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 246                    const struct ib_wc *in_wc, const struct ib_grh *in_grh,
 247                    const struct ib_mad *in, struct ib_mad *out,
 248                    size_t *out_mad_size, u16 *out_mad_pkey_index);
 249void qib_notify_create_mad_agent(struct rvt_dev_info *rdi, int port_idx);
 250void qib_notify_free_mad_agent(struct rvt_dev_info *rdi, int port_idx);
 251
 252/*
 253 * Compare the lower 24 bits of the two values.
 254 * Returns an integer <, ==, or > than zero.
 255 */
 256static inline int qib_cmp24(u32 a, u32 b)
 257{
 258        return (((int) a) - ((int) b)) << 8;
 259}
 260
 261int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords,
 262                          u64 *rwords, u64 *spkts, u64 *rpkts,
 263                          u64 *xmit_wait);
 264
 265int qib_get_counters(struct qib_pportdata *ppd,
 266                     struct qib_verbs_counters *cntrs);
 267
 268/*
 269 * Functions provided by qib driver for rdmavt to use
 270 */
 271unsigned qib_free_all_qps(struct rvt_dev_info *rdi);
 272void *qib_qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 273void qib_qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 274void qib_notify_qp_reset(struct rvt_qp *qp);
 275int qib_alloc_qpn(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt,
 276                  enum ib_qp_type type, u8 port);
 277void qib_restart_rc(struct rvt_qp *qp, u32 psn, int wait);
 278#ifdef CONFIG_DEBUG_FS
 279
 280void qib_qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter);
 281
 282#endif
 283
 284unsigned qib_pkt_delay(u32 plen, u8 snd_mult, u8 rcv_mult);
 285
 286void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail);
 287
 288void qib_put_txreq(struct qib_verbs_txreq *tx);
 289
 290int qib_verbs_send(struct rvt_qp *qp, struct ib_header *hdr,
 291                   u32 hdrwords, struct rvt_sge_state *ss, u32 len);
 292
 293void qib_uc_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
 294                int has_grh, void *data, u32 tlen, struct rvt_qp *qp);
 295
 296void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
 297                int has_grh, void *data, u32 tlen, struct rvt_qp *qp);
 298
 299int qib_check_ah(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);
 300
 301int qib_check_send_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe,
 302                       bool *call_send);
 303
 304struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid);
 305
 306void qib_rc_rnr_retry(unsigned long arg);
 307
 308void qib_rc_send_complete(struct rvt_qp *qp, struct ib_header *hdr);
 309
 310int qib_post_ud_send(struct rvt_qp *qp, const struct ib_send_wr *wr);
 311
 312void qib_ud_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
 313                int has_grh, void *data, u32 tlen, struct rvt_qp *qp);
 314
 315void mr_rcu_callback(struct rcu_head *list);
 316
 317void qib_migrate_qp(struct rvt_qp *qp);
 318
 319int qib_ruc_check_hdr(struct qib_ibport *ibp, struct ib_header *hdr,
 320                      int has_grh, struct rvt_qp *qp, u32 bth0);
 321
 322u32 qib_make_grh(struct qib_ibport *ibp, struct ib_grh *hdr,
 323                 const struct ib_global_route *grh, u32 hwords, u32 nwords);
 324
 325void qib_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,
 326                         u32 bth0, u32 bth2);
 327
 328void _qib_do_send(struct work_struct *work);
 329
 330void qib_do_send(struct rvt_qp *qp);
 331
 332void qib_send_rc_ack(struct rvt_qp *qp);
 333
 334int qib_make_rc_req(struct rvt_qp *qp, unsigned long *flags);
 335
 336int qib_make_uc_req(struct rvt_qp *qp, unsigned long *flags);
 337
 338int qib_make_ud_req(struct rvt_qp *qp, unsigned long *flags);
 339
 340int qib_register_ib_device(struct qib_devdata *);
 341
 342void qib_unregister_ib_device(struct qib_devdata *);
 343
 344void qib_ib_rcv(struct qib_ctxtdata *, void *, void *, u32);
 345
 346void qib_ib_piobufavail(struct qib_devdata *);
 347
 348unsigned qib_get_npkeys(struct qib_devdata *);
 349
 350unsigned qib_get_pkey(struct qib_ibport *, unsigned);
 351
 352extern const enum ib_wc_opcode ib_qib_wc_opcode[];
 353
 354/*
 355 * Below  HCA-independent IB PhysPortState values, returned
 356 * by the f_ibphys_portstate() routine.
 357 */
 358#define IB_PHYSPORTSTATE_SLEEP 1
 359#define IB_PHYSPORTSTATE_POLL 2
 360#define IB_PHYSPORTSTATE_DISABLED 3
 361#define IB_PHYSPORTSTATE_CFG_TRAIN 4
 362#define IB_PHYSPORTSTATE_LINKUP 5
 363#define IB_PHYSPORTSTATE_LINK_ERR_RECOVER 6
 364#define IB_PHYSPORTSTATE_CFG_DEBOUNCE 8
 365#define IB_PHYSPORTSTATE_CFG_IDLE 0xB
 366#define IB_PHYSPORTSTATE_RECOVERY_RETRAIN 0xC
 367#define IB_PHYSPORTSTATE_RECOVERY_WAITRMT 0xE
 368#define IB_PHYSPORTSTATE_RECOVERY_IDLE 0xF
 369#define IB_PHYSPORTSTATE_CFG_ENH 0x10
 370#define IB_PHYSPORTSTATE_CFG_WAIT_ENH 0x13
 371
 372extern const int ib_rvt_state_ops[];
 373
 374extern __be64 ib_qib_sys_image_guid;    /* in network order */
 375
 376extern unsigned int ib_rvt_lkey_table_size;
 377
 378extern unsigned int ib_qib_max_cqes;
 379
 380extern unsigned int ib_qib_max_cqs;
 381
 382extern unsigned int ib_qib_max_qp_wrs;
 383
 384extern unsigned int ib_qib_max_qps;
 385
 386extern unsigned int ib_qib_max_sges;
 387
 388extern unsigned int ib_qib_max_mcast_grps;
 389
 390extern unsigned int ib_qib_max_mcast_qp_attached;
 391
 392extern unsigned int ib_qib_max_srqs;
 393
 394extern unsigned int ib_qib_max_srq_sges;
 395
 396extern unsigned int ib_qib_max_srq_wrs;
 397
 398extern const u32 ib_qib_rnr_table[];
 399
 400extern const struct rvt_operation_params qib_post_parms[];
 401
 402#endif                          /* QIB_VERBS_H */
 403