drivers/infiniband/hw/bnxt_re/qplib_fp.h

   1 /*
   2  * Broadcom NetXtreme-E RoCE driver.
   3  *
   4  * Copyright (c) 2016 - 2017, Broadcom. All rights reserved.  The term
   5  * Broadcom refers to Broadcom Limited and/or its subsidiaries.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * BSD license below:
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  *
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in
  21  *    the documentation and/or other materials provided with the
  22  *    distribution.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
  25  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  26  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  27  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
  28  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  31  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  32  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  33  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  34  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  * Description: Fast Path Operators (header)
  37  */
  38
  39 #ifndef __BNXT_QPLIB_FP_H__
  40 #define __BNXT_QPLIB_FP_H__
  41
  42 struct bnxt_qplib_sge {
  43         u64                             addr;
  44         u32                             lkey;
  45         u32                             size;
  46 };
  47
  48 #define BNXT_QPLIB_MAX_SQE_ENTRY_SIZE   sizeof(struct sq_send)
  49
  50 #define SQE_CNT_PER_PG          (PAGE_SIZE / BNXT_QPLIB_MAX_SQE_ENTRY_SIZE)
  51 #define SQE_MAX_IDX_PER_PG      (SQE_CNT_PER_PG - 1)
  52
  53 static inline u32 get_sqe_pg(u32 val)
  54 {
  55         return ((val & ~SQE_MAX_IDX_PER_PG) / SQE_CNT_PER_PG);
  56 }
  57
  58 static inline u32 get_sqe_idx(u32 val)
  59 {
  60         return (val & SQE_MAX_IDX_PER_PG);
  61 }
  62
  63 #define BNXT_QPLIB_MAX_PSNE_ENTRY_SIZE  sizeof(struct sq_psn_search)
  64
  65 #define PSNE_CNT_PER_PG         (PAGE_SIZE / BNXT_QPLIB_MAX_PSNE_ENTRY_SIZE)
  66 #define PSNE_MAX_IDX_PER_PG     (PSNE_CNT_PER_PG - 1)
  67
  68 static inline u32 get_psne_pg(u32 val)
  69 {
  70         return ((val & ~PSNE_MAX_IDX_PER_PG) / PSNE_CNT_PER_PG);
  71 }
  72
  73 static inline u32 get_psne_idx(u32 val)
  74 {
  75         return (val & PSNE_MAX_IDX_PER_PG);
  76 }
  77
  78 #define BNXT_QPLIB_QP_MAX_SGL   6
  79
  80 struct bnxt_qplib_swq {
  81         u64                             wr_id;
  82         u8                              type;
  83         u8                              flags;
  84         u32                             start_psn;
  85         u32                             next_psn;
  86         struct sq_psn_search            *psn_search;
  87 };
  88
  89 struct bnxt_qplib_swqe {
  90         /* General */
  91 #define BNXT_QPLIB_FENCE_WRID   0x46454E43      /* "FENC" */
  92         u64                             wr_id;
  93         u8                              reqs_type;
  94         u8                              type;
  95 #define BNXT_QPLIB_SWQE_TYPE_SEND                       0
  96 #define BNXT_QPLIB_SWQE_TYPE_SEND_WITH_IMM              1
  97 #define BNXT_QPLIB_SWQE_TYPE_SEND_WITH_INV              2
  98 #define BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE                 4
  99 #define BNXT_QPLIB_SWQE_TYPE_RDMA_WRITE_WITH_IMM        5
 100 #define BNXT_QPLIB_SWQE_TYPE_RDMA_READ                  6
 101 #define BNXT_QPLIB_SWQE_TYPE_ATOMIC_CMP_AND_SWP         8
 102 #define BNXT_QPLIB_SWQE_TYPE_ATOMIC_FETCH_AND_ADD       11
 103 #define BNXT_QPLIB_SWQE_TYPE_LOCAL_INV                  12
 104 #define BNXT_QPLIB_SWQE_TYPE_FAST_REG_MR                13
 105 #define BNXT_QPLIB_SWQE_TYPE_REG_MR                     13
 106 #define BNXT_QPLIB_SWQE_TYPE_BIND_MW                    14
 107 #define BNXT_QPLIB_SWQE_TYPE_RECV                       128
 108 #define BNXT_QPLIB_SWQE_TYPE_RECV_RDMA_IMM              129
 109         u8                              flags;
 110 #define BNXT_QPLIB_SWQE_FLAGS_SIGNAL_COMP               BIT(0)
 111 #define BNXT_QPLIB_SWQE_FLAGS_RD_ATOMIC_FENCE           BIT(1)
 112 #define BNXT_QPLIB_SWQE_FLAGS_UC_FENCE                  BIT(2)
 113 #define BNXT_QPLIB_SWQE_FLAGS_SOLICIT_EVENT             BIT(3)
 114 #define BNXT_QPLIB_SWQE_FLAGS_INLINE                    BIT(4)
 115         struct bnxt_qplib_sge           sg_list[BNXT_QPLIB_QP_MAX_SGL];
 116         int                             num_sge;
 117         /* Max inline data is 96 bytes */
 118         u32                             inline_len;
 119 #define BNXT_QPLIB_SWQE_MAX_INLINE_LENGTH               96
 120         u8              inline_data[BNXT_QPLIB_SWQE_MAX_INLINE_LENGTH];
 121
 122         union {
 123                 /* Send, with imm, inval key */
 124                 struct {
 125                         union {
 126                                 __be32  imm_data;
 127                                 u32     inv_key;
 128                         };
 129                         u32             q_key;
 130                         u32             dst_qp;
 131                         u16             avid;
 132                 } send;
 133
 134                 /* Send Raw Ethernet and QP1 */
 135                 struct {
 136                         u16             lflags;
 137                         u16             cfa_action;
 138                         u32             cfa_meta;
 139                 } rawqp1;
 140
 141                 /* RDMA write, with imm, read */
 142                 struct {
 143                         union {
 144                                 __be32  imm_data;
 145                                 u32     inv_key;
 146                         };
 147                         u64             remote_va;
 148                         u32             r_key;
 149                 } rdma;
 150
 151                 /* Atomic cmp/swap, fetch/add */
 152                 struct {
 153                         u64             remote_va;
 154                         u32             r_key;
 155                         u64             swap_data;
 156                         u64             cmp_data;
 157                 } atomic;
 158
 159                 /* Local Invalidate */
 160                 struct {
 161                         u32             inv_l_key;
 162                 } local_inv;
 163
 164                 /* FR-PMR */
 165                 struct {
 166                         u8              access_cntl;
 167                         u8              pg_sz_log;
 168                         bool            zero_based;
 169                         u32             l_key;
 170                         u32             length;
 171                         u8              pbl_pg_sz_log;
 172 #define BNXT_QPLIB_SWQE_PAGE_SIZE_4K                    0
 173 #define BNXT_QPLIB_SWQE_PAGE_SIZE_8K                    1
 174 #define BNXT_QPLIB_SWQE_PAGE_SIZE_64K                   4
 175 #define BNXT_QPLIB_SWQE_PAGE_SIZE_256K                  6
 176 #define BNXT_QPLIB_SWQE_PAGE_SIZE_1M                    8
 177 #define BNXT_QPLIB_SWQE_PAGE_SIZE_2M                    9
 178 #define BNXT_QPLIB_SWQE_PAGE_SIZE_4M                    10
 179 #define BNXT_QPLIB_SWQE_PAGE_SIZE_1G                    18
 180                         u8              levels;
 181 #define PAGE_SHIFT_4K   12
 182                         __le64          *pbl_ptr;
 183                         dma_addr_t      pbl_dma_ptr;
 184                         u64             *page_list;
 185                         u16             page_list_len;
 186                         u64             va;
 187                 } frmr;
 188
 189                 /* Bind */
 190                 struct {
 191                         u8              access_cntl;
 192 #define BNXT_QPLIB_BIND_SWQE_ACCESS_LOCAL_WRITE         BIT(0)
 193 #define BNXT_QPLIB_BIND_SWQE_ACCESS_REMOTE_READ         BIT(1)
 194 #define BNXT_QPLIB_BIND_SWQE_ACCESS_REMOTE_WRITE        BIT(2)
 195 #define BNXT_QPLIB_BIND_SWQE_ACCESS_REMOTE_ATOMIC       BIT(3)
 196 #define BNXT_QPLIB_BIND_SWQE_ACCESS_WINDOW_BIND         BIT(4)
 197                         bool            zero_based;
 198                         u8              mw_type;
 199                         u32             parent_l_key;
 200                         u32             r_key;
 201                         u64             va;
 202                         u32             length;
 203                 } bind;
 204         };
 205 };
 206
 207 #define BNXT_QPLIB_MAX_RQE_ENTRY_SIZE   sizeof(struct rq_wqe)
 208
 209 #define RQE_CNT_PER_PG          (PAGE_SIZE / BNXT_QPLIB_MAX_RQE_ENTRY_SIZE)
 210 #define RQE_MAX_IDX_PER_PG      (RQE_CNT_PER_PG - 1)
 211 #define RQE_PG(x)               (((x) & ~RQE_MAX_IDX_PER_PG) / RQE_CNT_PER_PG)
 212 #define RQE_IDX(x)              ((x) & RQE_MAX_IDX_PER_PG)
 213
 214 struct bnxt_qplib_q {
 215         struct bnxt_qplib_hwq           hwq;
 216         struct bnxt_qplib_swq           *swq;
 217         struct scatterlist              *sglist;
 218         u32                             nmap;
 219         u32                             max_wqe;
 220         u16                             q_full_delta;
 221         u16                             max_sge;
 222         u32                             psn;
 223         bool                            flush_in_progress;
 224         bool                            condition;
 225         bool                            single;
 226         bool                            send_phantom;
 227         u32                             phantom_wqe_cnt;
 228         u32                             phantom_cqe_cnt;
 229         u32                             next_cq_cons;
 230 };
 231
 232 struct bnxt_qplib_qp {
 233         struct bnxt_qplib_pd            *pd;
 234         struct bnxt_qplib_dpi           *dpi;
 235         u64                             qp_handle;
 236         u32                             id;
 237         u8                              type;
 238         u8                              sig_type;
 239         u32                             modify_flags;
 240         u8                              state;
 241         u8                              cur_qp_state;
 242         u32                             max_inline_data;
 243         u32                             mtu;
 244         u8                              path_mtu;
 245         bool                            en_sqd_async_notify;
 246         u16                             pkey_index;
 247         u32                             qkey;
 248         u32                             dest_qp_id;
 249         u8                              access;
 250         u8                              timeout;
 251         u8                              retry_cnt;
 252         u8                              rnr_retry;
 253         u64                             wqe_cnt;
 254         u32                             min_rnr_timer;
 255         u32                             max_rd_atomic;
 256         u32                             max_dest_rd_atomic;
 257         u32                             dest_qpn;
 258         u8                              smac[6];
 259         u16                             vlan_id;
 260         u8                              nw_type;
 261         struct bnxt_qplib_ah            ah;
 262
 263 #define BTH_PSN_MASK                    ((1 << 24) - 1)
 264         /* SQ */
 265         struct bnxt_qplib_q             sq;
 266         /* RQ */
 267         struct bnxt_qplib_q             rq;
 268         /* SRQ */
 269         struct bnxt_qplib_srq           *srq;
 270         /* CQ */
 271         struct bnxt_qplib_cq            *scq;
 272         struct bnxt_qplib_cq            *rcq;
 273         /* IRRQ and ORRQ */
 274         struct bnxt_qplib_hwq           irrq;
 275         struct bnxt_qplib_hwq           orrq;
 276         /* Header buffer for QP1 */
 277         int                             sq_hdr_buf_size;
 278         int                             rq_hdr_buf_size;
 279 /*
 280  * Buffer space for ETH(14), IP or GRH(40), UDP header(8)
 281  * and ib_bth + ib_deth (20).
 282  * Max required is 82 when RoCE V2 is enabled
 283  */
 284 #define BNXT_QPLIB_MAX_QP1_SQ_HDR_SIZE_V2       86
 285         /* Ethernet header      =  14 */
 286         /* ib_grh               =  40 (provided by MAD) */
 287         /* ib_bth + ib_deth     =  20 */
 288         /* MAD                  = 256 (provided by MAD) */
 289         /* iCRC                 =   4 */
 290 #define BNXT_QPLIB_MAX_QP1_RQ_ETH_HDR_SIZE      14
 291 #define BNXT_QPLIB_MAX_QP1_RQ_HDR_SIZE_V2       512
 292 #define BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV4        20
 293 #define BNXT_QPLIB_MAX_GRH_HDR_SIZE_IPV6        40
 294 #define BNXT_QPLIB_MAX_QP1_RQ_BDETH_HDR_SIZE    20
 295         void                            *sq_hdr_buf;
 296         dma_addr_t                      sq_hdr_buf_map;
 297         void                            *rq_hdr_buf;
 298         dma_addr_t                      rq_hdr_buf_map;
 299 };
 300
 301 #define BNXT_QPLIB_MAX_CQE_ENTRY_SIZE   sizeof(struct cq_base)
 302
 303 #define CQE_CNT_PER_PG          (PAGE_SIZE / BNXT_QPLIB_MAX_CQE_ENTRY_SIZE)
 304 #define CQE_MAX_IDX_PER_PG      (CQE_CNT_PER_PG - 1)
 305 #define CQE_PG(x)               (((x) & ~CQE_MAX_IDX_PER_PG) / CQE_CNT_PER_PG)
 306 #define CQE_IDX(x)              ((x) & CQE_MAX_IDX_PER_PG)
 307
 308 #define ROCE_CQE_CMP_V                  0
 309 #define CQE_CMP_VALID(hdr, raw_cons, cp_bit)                    \
 310         (!!((hdr)->cqe_type_toggle & CQ_BASE_TOGGLE) ==         \
 311            !((raw_cons) & (cp_bit)))
 312
 313 static inline bool bnxt_qplib_queue_full(struct bnxt_qplib_q *qplib_q)
 314 {
 315         return HWQ_CMP((qplib_q->hwq.prod + qplib_q->q_full_delta),
 316                        &qplib_q->hwq) == HWQ_CMP(qplib_q->hwq.cons,
 317                                                  &qplib_q->hwq);
 318 }
 319
 320 struct bnxt_qplib_cqe {
 321         u8                              status;
 322         u8                              type;
 323         u8                              opcode;
 324         u32                             length;
 325         u64                             wr_id;
 326         union {
 327                 __be32                  immdata;
 328                 u32                     invrkey;
 329         };
 330         u64                             qp_handle;
 331         u64                             mr_handle;
 332         u16                             flags;
 333         u8                              smac[6];
 334         u32                             src_qp;
 335         u16                             raweth_qp1_flags;
 336         u16                             raweth_qp1_errors;
 337         u16                             raweth_qp1_cfa_code;
 338         u32                             raweth_qp1_flags2;
 339         u32                             raweth_qp1_metadata;
 340         u8                              raweth_qp1_payload_offset;
 341         u16                             pkey_index;
 342 };
 343
 344 #define BNXT_QPLIB_QUEUE_START_PERIOD           0x01
 345 struct bnxt_qplib_cq {
 346         struct bnxt_qplib_dpi           *dpi;
 347         void __iomem                    *dbr_base;
 348         u32                             max_wqe;
 349         u32                             id;
 350         u16                             count;
 351         u16                             period;
 352         struct bnxt_qplib_hwq           hwq;
 353         u32                             cnq_hw_ring_id;
 354         bool                            resize_in_progress;
 355         struct scatterlist              *sghead;
 356         u32                             nmap;
 357         u64                             cq_handle;
 358
 359 #define CQ_RESIZE_WAIT_TIME_MS          500
 360         unsigned long                   flags;
 361 #define CQ_FLAGS_RESIZE_IN_PROG         1
 362         wait_queue_head_t               waitq;
 363 };
 364
 365 #define BNXT_QPLIB_MAX_IRRQE_ENTRY_SIZE sizeof(struct xrrq_irrq)
 366 #define BNXT_QPLIB_MAX_ORRQE_ENTRY_SIZE sizeof(struct xrrq_orrq)
 367 #define IRD_LIMIT_TO_IRRQ_SLOTS(x)      (2 * (x) + 2)
 368 #define IRRQ_SLOTS_TO_IRD_LIMIT(s)      (((s) >> 1) - 1)
 369 #define ORD_LIMIT_TO_ORRQ_SLOTS(x)      ((x) + 1)
 370 #define ORRQ_SLOTS_TO_ORD_LIMIT(s)      ((s) - 1)
 371
 372 #define BNXT_QPLIB_MAX_NQE_ENTRY_SIZE   sizeof(struct nq_base)
 373
 374 #define NQE_CNT_PER_PG          (PAGE_SIZE / BNXT_QPLIB_MAX_NQE_ENTRY_SIZE)
 375 #define NQE_MAX_IDX_PER_PG      (NQE_CNT_PER_PG - 1)
 376 #define NQE_PG(x)               (((x) & ~NQE_MAX_IDX_PER_PG) / NQE_CNT_PER_PG)
 377 #define NQE_IDX(x)              ((x) & NQE_MAX_IDX_PER_PG)
 378
 379 #define NQE_CMP_VALID(hdr, raw_cons, cp_bit)                    \
 380         (!!(le32_to_cpu((hdr)->info63_v[0]) & NQ_BASE_V) ==     \
 381            !((raw_cons) & (cp_bit)))
 382
 383 #define BNXT_QPLIB_NQE_MAX_CNT          (128 * 1024)
 384
 385 #define NQ_CONS_PCI_BAR_REGION          2
 386 #define NQ_DB_KEY_CP                    (0x2 << CMPL_DOORBELL_KEY_SFT)
 387 #define NQ_DB_IDX_VALID                 CMPL_DOORBELL_IDX_VALID
 388 #define NQ_DB_IRQ_DIS                   CMPL_DOORBELL_MASK
 389 #define NQ_DB_CP_FLAGS_REARM            (NQ_DB_KEY_CP |         \
 390                                          NQ_DB_IDX_VALID)
 391 #define NQ_DB_CP_FLAGS                  (NQ_DB_KEY_CP    |      \
 392                                          NQ_DB_IDX_VALID |      \
 393                                          NQ_DB_IRQ_DIS)
 394 #define NQ_DB_REARM(db, raw_cons, cp_bit)                       \
 395         writel(NQ_DB_CP_FLAGS_REARM | ((raw_cons) & ((cp_bit) - 1)), db)
 396 #define NQ_DB(db, raw_cons, cp_bit)                             \
 397         writel(NQ_DB_CP_FLAGS | ((raw_cons) & ((cp_bit) - 1)), db)
 398
 399 struct bnxt_qplib_nq {
 400         struct pci_dev                  *pdev;
 401
 402         int                             vector;
 403         int                             budget;
 404         bool                            requested;
 405         struct tasklet_struct           worker;
 406         struct bnxt_qplib_hwq           hwq;
 407
 408         u16                             bar_reg;
 409         u16                             bar_reg_off;
 410         u16                             ring_id;
 411         void __iomem                    *bar_reg_iomem;
 412
 413         int                             (*cqn_handler)
 414                                                 (struct bnxt_qplib_nq *nq,
 415                                                  struct bnxt_qplib_cq *cq);
 416         int                             (*srqn_handler)
 417                                                 (struct bnxt_qplib_nq *nq,
 418                                                  void *srq,
 419                                                  u8 event);
 420 };
 421
 422 void bnxt_qplib_disable_nq(struct bnxt_qplib_nq *nq);
 423 int bnxt_qplib_enable_nq(struct pci_dev *pdev, struct bnxt_qplib_nq *nq,
 424                          int msix_vector, int bar_reg_offset,
 425                          int (*cqn_handler)(struct bnxt_qplib_nq *nq,
 426                                             struct bnxt_qplib_cq *cq),
 427                          int (*srqn_handler)(struct bnxt_qplib_nq *nq,
 428                                              void *srq,
 429                                              u8 event));
 430 int bnxt_qplib_create_qp1(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp);
 431 int bnxt_qplib_create_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp);
 432 int bnxt_qplib_modify_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp);
 433 int bnxt_qplib_query_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp);
 434 int bnxt_qplib_destroy_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp);
 435 void *bnxt_qplib_get_qp1_sq_buf(struct bnxt_qplib_qp *qp,
 436                                 struct bnxt_qplib_sge *sge);
 437 void *bnxt_qplib_get_qp1_rq_buf(struct bnxt_qplib_qp *qp,
 438                                 struct bnxt_qplib_sge *sge);
 439 u32 bnxt_qplib_get_rq_prod_index(struct bnxt_qplib_qp *qp);
 440 dma_addr_t bnxt_qplib_get_qp_buf_from_index(struct bnxt_qplib_qp *qp,
 441                                             u32 index);
 442 void bnxt_qplib_post_send_db(struct bnxt_qplib_qp *qp);
 443 int bnxt_qplib_post_send(struct bnxt_qplib_qp *qp,
 444                          struct bnxt_qplib_swqe *wqe);
 445 void bnxt_qplib_post_recv_db(struct bnxt_qplib_qp *qp);
 446 int bnxt_qplib_post_recv(struct bnxt_qplib_qp *qp,
 447                          struct bnxt_qplib_swqe *wqe);
 448 int bnxt_qplib_create_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq);
 449 int bnxt_qplib_destroy_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq);
 450 int bnxt_qplib_poll_cq(struct bnxt_qplib_cq *cq, struct bnxt_qplib_cqe *cqe,
 451                        int num, struct bnxt_qplib_qp **qp);
 452 bool bnxt_qplib_is_cq_empty(struct bnxt_qplib_cq *cq);
 453 void bnxt_qplib_req_notify_cq(struct bnxt_qplib_cq *cq, u32 arm_type);
 454 void bnxt_qplib_free_nq(struct bnxt_qplib_nq *nq);
 455 int bnxt_qplib_alloc_nq(struct pci_dev *pdev, struct bnxt_qplib_nq *nq);
 456 #endif /* __BNXT_QPLIB_FP_H__ */