drivers/infiniband/hw/mlx4/mlx4_ib.h

   1 /*
   2  * Copyright (c) 2006, 2007 Cisco Systems.  All rights reserved.
   3  * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #ifndef MLX4_IB_H
  35 #define MLX4_IB_H
  36
  37 #include <linux/compiler.h>
  38 #include <linux/list.h>
  39 #include <linux/mutex.h>
  40
  41 #include <rdma/ib_verbs.h>
  42 #include <rdma/ib_umem.h>
  43
  44 #include <linux/mlx4/device.h>
  45 #include <linux/mlx4/doorbell.h>
  46
  47 #define MLX4_IB_DRV_NAME        "mlx4_ib"
  48
  49 #ifdef pr_fmt
  50 #undef pr_fmt
  51 #endif
  52 #define pr_fmt(fmt)     "<" MLX4_IB_DRV_NAME "> %s: " fmt, __func__
  53
  54 #define mlx4_ib_warn(ibdev, format, arg...) \
  55         dev_warn((ibdev)->dma_device, MLX4_IB_DRV_NAME ": " format, ## arg)
  56
  57 enum {
  58         MLX4_IB_SQ_MIN_WQE_SHIFT = 6,
  59         MLX4_IB_MAX_HEADROOM     = 2048
  60 };
  61
  62 #define MLX4_IB_SQ_HEADROOM(shift)      ((MLX4_IB_MAX_HEADROOM >> (shift)) + 1)
  63 #define MLX4_IB_SQ_MAX_SPARE            (MLX4_IB_SQ_HEADROOM(MLX4_IB_SQ_MIN_WQE_SHIFT))
  64
  65 struct mlx4_ib_ucontext {
  66         struct ib_ucontext      ibucontext;
  67         struct mlx4_uar         uar;
  68         struct list_head        db_page_list;
  69         struct mutex            db_page_mutex;
  70 };
  71
  72 struct mlx4_ib_pd {
  73         struct ib_pd            ibpd;
  74         u32                     pdn;
  75 };
  76
  77 struct mlx4_ib_xrcd {
  78         struct ib_xrcd          ibxrcd;
  79         u32                     xrcdn;
  80         struct ib_pd           *pd;
  81         struct ib_cq           *cq;
  82 };
  83
  84 struct mlx4_ib_cq_buf {
  85         struct mlx4_buf         buf;
  86         struct mlx4_mtt         mtt;
  87 };
  88
  89 struct mlx4_ib_cq_resize {
  90         struct mlx4_ib_cq_buf   buf;
  91         int                     cqe;
  92 };
  93
  94 struct mlx4_ib_cq {
  95         struct ib_cq            ibcq;
  96         struct mlx4_cq          mcq;
  97         struct mlx4_ib_cq_buf   buf;
  98         struct mlx4_ib_cq_resize *resize_buf;
  99         struct mlx4_db          db;
 100         spinlock_t              lock;
 101         struct mutex            resize_mutex;
 102         struct ib_umem         *umem;
 103         struct ib_umem         *resize_umem;
 104 };
 105
 106 struct mlx4_ib_mr {
 107         struct ib_mr            ibmr;
 108         struct mlx4_mr          mmr;
 109         struct ib_umem         *umem;
 110 };
 111
 112 struct mlx4_ib_fast_reg_page_list {
 113         struct ib_fast_reg_page_list    ibfrpl;
 114         __be64                         *mapped_page_list;
 115         dma_addr_t                      map;
 116 };
 117
 118 struct mlx4_ib_fmr {
 119         struct ib_fmr           ibfmr;
 120         struct mlx4_fmr         mfmr;
 121 };
 122
 123 struct mlx4_ib_wq {
 124         u64                    *wrid;
 125         spinlock_t              lock;
 126         int                     wqe_cnt;
 127         int                     max_post;
 128         int                     max_gs;
 129         int                     offset;
 130         int                     wqe_shift;
 131         unsigned                head;
 132         unsigned                tail;
 133 };
 134
 135 enum mlx4_ib_qp_flags {
 136         MLX4_IB_QP_LSO = IB_QP_CREATE_IPOIB_UD_LSO,
 137         MLX4_IB_QP_BLOCK_MULTICAST_LOOPBACK = IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK,
 138         MLX4_IB_SRIOV_TUNNEL_QP = 1 << 30,
 139         MLX4_IB_SRIOV_SQP = 1 << 31,
 140 };
 141
 142 struct mlx4_ib_gid_entry {
 143         struct list_head        list;
 144         union ib_gid            gid;
 145         int                     added;
 146         u8                      port;
 147 };
 148
 149 enum mlx4_ib_qp_type {
 150         /*
 151          * IB_QPT_SMI and IB_QPT_GSI have to be the first two entries
 152          * here (and in that order) since the MAD layer uses them as
 153          * indices into a 2-entry table.
 154          */
 155         MLX4_IB_QPT_SMI = IB_QPT_SMI,
 156         MLX4_IB_QPT_GSI = IB_QPT_GSI,
 157
 158         MLX4_IB_QPT_RC = IB_QPT_RC,
 159         MLX4_IB_QPT_UC = IB_QPT_UC,
 160         MLX4_IB_QPT_UD = IB_QPT_UD,
 161         MLX4_IB_QPT_RAW_IPV6 = IB_QPT_RAW_IPV6,
 162         MLX4_IB_QPT_RAW_ETHERTYPE = IB_QPT_RAW_ETHERTYPE,
 163         MLX4_IB_QPT_RAW_PACKET = IB_QPT_RAW_PACKET,
 164         MLX4_IB_QPT_XRC_INI = IB_QPT_XRC_INI,
 165         MLX4_IB_QPT_XRC_TGT = IB_QPT_XRC_TGT,
 166
 167         MLX4_IB_QPT_PROXY_SMI_OWNER     = 1 << 16,
 168         MLX4_IB_QPT_PROXY_SMI           = 1 << 17,
 169         MLX4_IB_QPT_PROXY_GSI           = 1 << 18,
 170         MLX4_IB_QPT_TUN_SMI_OWNER       = 1 << 19,
 171         MLX4_IB_QPT_TUN_SMI             = 1 << 20,
 172         MLX4_IB_QPT_TUN_GSI             = 1 << 21,
 173 };
 174
 175 #define MLX4_IB_QPT_ANY_SRIOV   (MLX4_IB_QPT_PROXY_SMI_OWNER | \
 176         MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI | MLX4_IB_QPT_TUN_SMI_OWNER | \
 177         MLX4_IB_QPT_TUN_SMI | MLX4_IB_QPT_TUN_GSI)
 178
 179 struct mlx4_ib_tunnel_header {
 180         struct mlx4_av av;
 181         __be32 remote_qpn;
 182         __be32 qkey;
 183         __be16 vlan;
 184         u8 mac[6];
 185         __be16 pkey_index;
 186         u8 reserved[6];
 187 };
 188
 189 struct mlx4_ib_buf {
 190         void *addr;
 191         dma_addr_t map;
 192 };
 193
 194 struct mlx4_rcv_tunnel_hdr {
 195         __be32 flags_src_qp; /* flags[6:5] is defined for VLANs:
 196                               * 0x0 - no vlan was in the packet
 197                               * 0x01 - C-VLAN was in the packet */
 198         u8 g_ml_path; /* gid bit stands for ipv6/4 header in RoCE */
 199         u8 reserved;
 200         __be16 pkey_index;
 201         __be16 sl_vid;
 202         __be16 slid_mac_47_32;
 203         __be32 mac_31_0;
 204 };
 205
 206 struct mlx4_ib_proxy_sqp_hdr {
 207         struct ib_grh grh;
 208         struct mlx4_rcv_tunnel_hdr tun;
 209 }  __packed;
 210
 211 struct mlx4_ib_qp {
 212         struct ib_qp            ibqp;
 213         struct mlx4_qp          mqp;
 214         struct mlx4_buf         buf;
 215
 216         struct mlx4_db          db;
 217         struct mlx4_ib_wq       rq;
 218
 219         u32                     doorbell_qpn;
 220         __be32                  sq_signal_bits;
 221         unsigned                sq_next_wqe;
 222         int                     sq_max_wqes_per_wr;
 223         int                     sq_spare_wqes;
 224         struct mlx4_ib_wq       sq;
 225
 226         enum mlx4_ib_qp_type    mlx4_ib_qp_type;
 227         struct ib_umem         *umem;
 228         struct mlx4_mtt         mtt;
 229         int                     buf_size;
 230         struct mutex            mutex;
 231         u16                     xrcdn;
 232         u32                     flags;
 233         u8                      port;
 234         u8                      alt_port;
 235         u8                      atomic_rd_en;
 236         u8                      resp_depth;
 237         u8                      sq_no_prefetch;
 238         u8                      state;
 239         int                     mlx_type;
 240         struct list_head        gid_list;
 241         struct list_head        steering_rules;
 242         struct mlx4_ib_buf      *sqp_proxy_rcv;
 243
 244 };
 245
 246 struct mlx4_ib_srq {
 247         struct ib_srq           ibsrq;
 248         struct mlx4_srq         msrq;
 249         struct mlx4_buf         buf;
 250         struct mlx4_db          db;
 251         u64                    *wrid;
 252         spinlock_t              lock;
 253         int                     head;
 254         int                     tail;
 255         u16                     wqe_ctr;
 256         struct ib_umem         *umem;
 257         struct mlx4_mtt         mtt;
 258         struct mutex            mutex;
 259 };
 260
 261 struct mlx4_ib_ah {
 262         struct ib_ah            ibah;
 263         union mlx4_ext_av       av;
 264 };
 265
 266 struct mlx4_ib_tun_tx_buf {
 267         struct mlx4_ib_buf buf;
 268         struct ib_ah *ah;
 269 };
 270
 271 struct mlx4_ib_demux_pv_qp {
 272         struct ib_qp *qp;
 273         enum ib_qp_type proxy_qpt;
 274         struct mlx4_ib_buf *ring;
 275         struct mlx4_ib_tun_tx_buf *tx_ring;
 276         spinlock_t tx_lock;
 277         unsigned tx_ix_head;
 278         unsigned tx_ix_tail;
 279 };
 280
 281 struct mlx4_ib_demux_pv_ctx {
 282         int port;
 283         int slave;
 284         int has_smi;
 285         struct ib_device *ib_dev;
 286         struct ib_cq *cq;
 287         struct ib_pd *pd;
 288         struct ib_mr *mr;
 289         struct work_struct work;
 290         struct workqueue_struct *wq;
 291         struct mlx4_ib_demux_pv_qp qp[2];
 292 };
 293
 294 struct mlx4_ib_demux_ctx {
 295         struct ib_device *ib_dev;
 296         int port;
 297         struct workqueue_struct *wq;
 298         struct workqueue_struct *ud_wq;
 299         spinlock_t ud_lock;
 300         __be64 subnet_prefix;
 301         __be64 guid_cache[128];
 302         struct mlx4_ib_dev *dev;
 303         struct mlx4_ib_demux_pv_ctx **tun;
 304 };
 305
 306 struct mlx4_ib_sriov {
 307         struct mlx4_ib_demux_ctx demux[MLX4_MAX_PORTS];
 308         struct mlx4_ib_demux_pv_ctx *sqps[MLX4_MAX_PORTS];
 309         /* when using this spinlock you should use "irq" because
 310          * it may be called from interrupt context.*/
 311         spinlock_t going_down_lock;
 312         int is_going_down;
 313 };
 314
 315 struct mlx4_ib_iboe {
 316         spinlock_t              lock;
 317         struct net_device      *netdevs[MLX4_MAX_PORTS];
 318         struct notifier_block   nb;
 319         union ib_gid            gid_table[MLX4_MAX_PORTS][128];
 320 };
 321
 322 struct mlx4_ib_dev {
 323         struct ib_device        ib_dev;
 324         struct mlx4_dev        *dev;
 325         int                     num_ports;
 326         void __iomem           *uar_map;
 327
 328         struct mlx4_uar         priv_uar;
 329         u32                     priv_pdn;
 330         MLX4_DECLARE_DOORBELL_LOCK(uar_lock);
 331
 332         struct ib_mad_agent    *send_agent[MLX4_MAX_PORTS][2];
 333         struct ib_ah           *sm_ah[MLX4_MAX_PORTS];
 334         spinlock_t              sm_lock;
 335         struct mlx4_ib_sriov    sriov;
 336
 337         struct mutex            cap_mask_mutex;
 338         bool                    ib_active;
 339         struct mlx4_ib_iboe     iboe;
 340         int                     counters[MLX4_MAX_PORTS];
 341         int                    *eq_table;
 342         int                     eq_added;
 343 };
 344
 345 struct ib_event_work {
 346         struct work_struct      work;
 347         struct mlx4_ib_dev      *ib_dev;
 348         struct mlx4_eqe         ib_eqe;
 349 };
 350
 351 struct mlx4_ib_qp_tunnel_init_attr {
 352         struct ib_qp_init_attr init_attr;
 353         int slave;
 354         enum ib_qp_type proxy_qp_type;
 355         u8 port;
 356 };
 357
 358 static inline struct mlx4_ib_dev *to_mdev(struct ib_device *ibdev)
 359 {
 360         return container_of(ibdev, struct mlx4_ib_dev, ib_dev);
 361 }
 362
 363 static inline struct mlx4_ib_ucontext *to_mucontext(struct ib_ucontext *ibucontext)
 364 {
 365         return container_of(ibucontext, struct mlx4_ib_ucontext, ibucontext);
 366 }
 367
 368 static inline struct mlx4_ib_pd *to_mpd(struct ib_pd *ibpd)
 369 {
 370         return container_of(ibpd, struct mlx4_ib_pd, ibpd);
 371 }
 372
 373 static inline struct mlx4_ib_xrcd *to_mxrcd(struct ib_xrcd *ibxrcd)
 374 {
 375         return container_of(ibxrcd, struct mlx4_ib_xrcd, ibxrcd);
 376 }
 377
 378 static inline struct mlx4_ib_cq *to_mcq(struct ib_cq *ibcq)
 379 {
 380         return container_of(ibcq, struct mlx4_ib_cq, ibcq);
 381 }
 382
 383 static inline struct mlx4_ib_cq *to_mibcq(struct mlx4_cq *mcq)
 384 {
 385         return container_of(mcq, struct mlx4_ib_cq, mcq);
 386 }
 387
 388 static inline struct mlx4_ib_mr *to_mmr(struct ib_mr *ibmr)
 389 {
 390         return container_of(ibmr, struct mlx4_ib_mr, ibmr);
 391 }
 392
 393 static inline struct mlx4_ib_fast_reg_page_list *to_mfrpl(struct ib_fast_reg_page_list *ibfrpl)
 394 {
 395         return container_of(ibfrpl, struct mlx4_ib_fast_reg_page_list, ibfrpl);
 396 }
 397
 398 static inline struct mlx4_ib_fmr *to_mfmr(struct ib_fmr *ibfmr)
 399 {
 400         return container_of(ibfmr, struct mlx4_ib_fmr, ibfmr);
 401 }
 402 static inline struct mlx4_ib_qp *to_mqp(struct ib_qp *ibqp)
 403 {
 404         return container_of(ibqp, struct mlx4_ib_qp, ibqp);
 405 }
 406
 407 static inline struct mlx4_ib_qp *to_mibqp(struct mlx4_qp *mqp)
 408 {
 409         return container_of(mqp, struct mlx4_ib_qp, mqp);
 410 }
 411
 412 static inline struct mlx4_ib_srq *to_msrq(struct ib_srq *ibsrq)
 413 {
 414         return container_of(ibsrq, struct mlx4_ib_srq, ibsrq);
 415 }
 416
 417 static inline struct mlx4_ib_srq *to_mibsrq(struct mlx4_srq *msrq)
 418 {
 419         return container_of(msrq, struct mlx4_ib_srq, msrq);
 420 }
 421
 422 static inline struct mlx4_ib_ah *to_mah(struct ib_ah *ibah)
 423 {
 424         return container_of(ibah, struct mlx4_ib_ah, ibah);
 425 }
 426
 427 int mlx4_ib_db_map_user(struct mlx4_ib_ucontext *context, unsigned long virt,
 428                         struct mlx4_db *db);
 429 void mlx4_ib_db_unmap_user(struct mlx4_ib_ucontext *context, struct mlx4_db *db);
 430
 431 struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc);
 432 int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
 433                            struct ib_umem *umem);
 434 struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 435                                   u64 virt_addr, int access_flags,
 436                                   struct ib_udata *udata);
 437 int mlx4_ib_dereg_mr(struct ib_mr *mr);
 438 struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd,
 439                                         int max_page_list_len);
 440 struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
 441                                                                int page_list_len);
 442 void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list);
 443
 444 int mlx4_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
 445 int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata);
 446 struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector,
 447                                 struct ib_ucontext *context,
 448                                 struct ib_udata *udata);
 449 int mlx4_ib_destroy_cq(struct ib_cq *cq);
 450 int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
 451 int mlx4_ib_arm_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
 452 void __mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq);
 453 void mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq);
 454
 455 struct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr);
 456 int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr);
 457 int mlx4_ib_destroy_ah(struct ib_ah *ah);
 458
 459 struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
 460                                   struct ib_srq_init_attr *init_attr,
 461                                   struct ib_udata *udata);
 462 int mlx4_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
 463                        enum ib_srq_attr_mask attr_mask, struct ib_udata *udata);
 464 int mlx4_ib_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr);
 465 int mlx4_ib_destroy_srq(struct ib_srq *srq);
 466 void mlx4_ib_free_srq_wqe(struct mlx4_ib_srq *srq, int wqe_index);
 467 int mlx4_ib_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
 468                           struct ib_recv_wr **bad_wr);
 469
 470 struct ib_qp *mlx4_ib_create_qp(struct ib_pd *pd,
 471                                 struct ib_qp_init_attr *init_attr,
 472                                 struct ib_udata *udata);
 473 int mlx4_ib_destroy_qp(struct ib_qp *qp);
 474 int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 475                       int attr_mask, struct ib_udata *udata);
 476 int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask,
 477                      struct ib_qp_init_attr *qp_init_attr);
 478 int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 479                       struct ib_send_wr **bad_wr);
 480 int mlx4_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 481                       struct ib_recv_wr **bad_wr);
 482
 483 int mlx4_MAD_IFC(struct mlx4_ib_dev *dev, int ignore_mkey, int ignore_bkey,
 484                  int port, struct ib_wc *in_wc, struct ib_grh *in_grh,
 485                  void *in_mad, void *response_mad);
 486 int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 487                         struct ib_wc *in_wc, struct ib_grh *in_grh,
 488                         struct ib_mad *in_mad, struct ib_mad *out_mad);
 489 int mlx4_ib_mad_init(struct mlx4_ib_dev *dev);
 490 void mlx4_ib_mad_cleanup(struct mlx4_ib_dev *dev);
 491
 492 struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int mr_access_flags,
 493                                   struct ib_fmr_attr *fmr_attr);
 494 int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, int npages,
 495                          u64 iova);
 496 int mlx4_ib_unmap_fmr(struct list_head *fmr_list);
 497 int mlx4_ib_fmr_dealloc(struct ib_fmr *fmr);
 498
 499 int mlx4_ib_resolve_grh(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah_attr,
 500                         u8 *mac, int *is_mcast, u8 port);
 501
 502 static inline int mlx4_ib_ah_grh_present(struct mlx4_ib_ah *ah)
 503 {
 504         u8 port = be32_to_cpu(ah->av.ib.port_pd) >> 24 & 3;
 505
 506         if (rdma_port_get_link_layer(ah->ibah.device, port) == IB_LINK_LAYER_ETHERNET)
 507                 return 1;
 508
 509         return !!(ah->av.ib.g_slid & 0x80);
 510 }
 511
 512 int mlx4_ib_add_mc(struct mlx4_ib_dev *mdev, struct mlx4_ib_qp *mqp,
 513                    union ib_gid *gid);
 514
 515 void mlx4_ib_dispatch_event(struct mlx4_ib_dev *dev, u8 port_num,
 516                             enum ib_event_type type);
 517
 518 #endif /* MLX4_IB_H */