drivers/infiniband/hw/bnxt_re/ib_verbs.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: IB Verbs interpreter (header)
  37  */
  38
  39 #ifndef __BNXT_RE_IB_VERBS_H__
  40 #define __BNXT_RE_IB_VERBS_H__
  41
  42 struct bnxt_re_gid_ctx {
  43         u32                     idx;
  44         u32                     refcnt;
  45 };
  46
  47 #define BNXT_RE_FENCE_BYTES     64
  48 struct bnxt_re_fence_data {
  49         u32 size;
  50         u8 va[BNXT_RE_FENCE_BYTES];
  51         dma_addr_t dma_addr;
  52         struct bnxt_re_mr *mr;
  53         struct ib_mw *mw;
  54         struct bnxt_qplib_swqe bind_wqe;
  55         u32 bind_rkey;
  56 };
  57
  58 struct bnxt_re_pd {
  59         struct ib_pd            ib_pd;
  60         struct bnxt_re_dev      *rdev;
  61         struct bnxt_qplib_pd    qplib_pd;
  62         struct bnxt_re_fence_data fence;
  63         struct rdma_user_mmap_entry *pd_db_mmap;
  64         struct rdma_user_mmap_entry *pd_wcdb_mmap;
  65 };
  66
  67 struct bnxt_re_ah {
  68         struct ib_ah            ib_ah;
  69         struct bnxt_re_dev      *rdev;
  70         struct bnxt_qplib_ah    qplib_ah;
  71 };
  72
  73 struct bnxt_re_srq {
  74         struct ib_srq           ib_srq;
  75         struct bnxt_re_dev      *rdev;
  76         u32                     srq_limit;
  77         struct bnxt_qplib_srq   qplib_srq;
  78         struct ib_umem          *umem;
  79         spinlock_t              lock;           /* protect srq */
  80         void                    *uctx_srq_page;
  81         struct hlist_node       hash_entry;
  82 };
  83
  84 struct bnxt_re_qp {
  85         struct ib_qp            ib_qp;
  86         struct list_head        list;
  87         struct bnxt_re_dev      *rdev;
  88         spinlock_t              sq_lock;        /* protect sq */
  89         spinlock_t              rq_lock;        /* protect rq */
  90         struct bnxt_qplib_qp    qplib_qp;
  91         struct ib_umem          *sumem;
  92         struct ib_umem          *rumem;
  93         /* QP1 */
  94         u32                     send_psn;
  95         struct ib_ud_header     qp1_hdr;
  96         struct bnxt_re_cq       *scq;
  97         struct bnxt_re_cq       *rcq;
  98         struct dentry           *dentry;
  99 };
 100
 101 struct bnxt_re_cq {
 102         struct ib_cq            ib_cq;
 103         struct bnxt_re_dev      *rdev;
 104         spinlock_t              cq_lock;        /* protect cq */
 105         u16                     cq_count;
 106         u16                     cq_period;
 107         struct bnxt_qplib_cq    qplib_cq;
 108         struct bnxt_qplib_cqe   *cql;
 109 #define MAX_CQL_PER_POLL        1024
 110         u32                     max_cql;
 111         struct ib_umem          *umem;
 112         struct ib_umem          *resize_umem;
 113         int                     resize_cqe;
 114         void                    *uctx_cq_page;
 115         struct hlist_node       hash_entry;
 116 };
 117
 118 struct bnxt_re_mr {
 119         struct bnxt_re_dev      *rdev;
 120         struct ib_mr            ib_mr;
 121         struct ib_umem          *ib_umem;
 122         struct bnxt_qplib_mrw   qplib_mr;
 123         u32                     npages;
 124         u64                     *pages;
 125         struct bnxt_qplib_frpl  qplib_frpl;
 126 };
 127
 128 struct bnxt_re_frpl {
 129         struct bnxt_re_dev              *rdev;
 130         struct bnxt_qplib_frpl          qplib_frpl;
 131         u64                             *page_list;
 132 };
 133
 134 struct bnxt_re_mw {
 135         struct bnxt_re_dev      *rdev;
 136         struct ib_mw            ib_mw;
 137         struct bnxt_qplib_mrw   qplib_mw;
 138 };
 139
 140 struct bnxt_re_ucontext {
 141         struct ib_ucontext      ib_uctx;
 142         struct bnxt_re_dev      *rdev;
 143         struct bnxt_qplib_dpi   dpi;
 144         struct bnxt_qplib_dpi   wcdpi;
 145         void                    *shpg;
 146         spinlock_t              sh_lock;        /* protect shpg */
 147         struct rdma_user_mmap_entry *shpage_mmap;
 148         u64 cmask;
 149 };
 150
 151 enum bnxt_re_mmap_flag {
 152         BNXT_RE_MMAP_SH_PAGE,
 153         BNXT_RE_MMAP_UC_DB,
 154         BNXT_RE_MMAP_WC_DB,
 155         BNXT_RE_MMAP_DBR_PAGE,
 156         BNXT_RE_MMAP_DBR_BAR,
 157         BNXT_RE_MMAP_TOGGLE_PAGE,
 158 };
 159
 160 struct bnxt_re_user_mmap_entry {
 161         struct rdma_user_mmap_entry rdma_entry;
 162         struct bnxt_re_ucontext *uctx;
 163         u64 mem_offset;
 164         u8 mmap_flag;
 165 };
 166
 167 static inline u16 bnxt_re_get_swqe_size(int nsge)
 168 {
 169         return sizeof(struct sq_send_hdr) + nsge * sizeof(struct sq_sge);
 170 }
 171
 172 static inline u16 bnxt_re_get_rwqe_size(int nsge)
 173 {
 174         return sizeof(struct rq_wqe_hdr) + (nsge * sizeof(struct sq_sge));
 175 }
 176
 177 enum {
 178         BNXT_RE_UCNTX_CAP_POW2_DISABLED = 0x1ULL,
 179         BNXT_RE_UCNTX_CAP_VAR_WQE_ENABLED = 0x2ULL,
 180 };
 181
 182 static inline u32 bnxt_re_init_depth(u32 ent, struct bnxt_re_ucontext *uctx)
 183 {
 184         return uctx ? (uctx->cmask & BNXT_RE_UCNTX_CAP_POW2_DISABLED) ?
 185                 ent : roundup_pow_of_two(ent) : ent;
 186 }
 187
 188 static inline bool bnxt_re_is_var_size_supported(struct bnxt_re_dev *rdev,
 189                                                  struct bnxt_re_ucontext *uctx)
 190 {
 191         if (uctx)
 192                 return uctx->cmask & BNXT_RE_UCNTX_CAP_VAR_WQE_ENABLED;
 193         else
 194                 return rdev->chip_ctx->modes.wqe_mode;
 195 }
 196
 197 int bnxt_re_query_device(struct ib_device *ibdev,
 198                          struct ib_device_attr *ib_attr,
 199                          struct ib_udata *udata);
 200 int bnxt_re_modify_device(struct ib_device *ibdev,
 201                           int device_modify_mask,
 202                           struct ib_device_modify *device_modify);
 203 int bnxt_re_query_port(struct ib_device *ibdev, u32 port_num,
 204                        struct ib_port_attr *port_attr);
 205 int bnxt_re_get_port_immutable(struct ib_device *ibdev, u32 port_num,
 206                                struct ib_port_immutable *immutable);
 207 void bnxt_re_query_fw_str(struct ib_device *ibdev, char *str);
 208 int bnxt_re_query_pkey(struct ib_device *ibdev, u32 port_num,
 209                        u16 index, u16 *pkey);
 210 int bnxt_re_del_gid(const struct ib_gid_attr *attr, void **context);
 211 int bnxt_re_add_gid(const struct ib_gid_attr *attr, void **context);
 212 int bnxt_re_query_gid(struct ib_device *ibdev, u32 port_num,
 213                       int index, union ib_gid *gid);
 214 enum rdma_link_layer bnxt_re_get_link_layer(struct ib_device *ibdev,
 215                                             u32 port_num);
 216 int bnxt_re_alloc_pd(struct ib_pd *pd, struct ib_udata *udata);
 217 int bnxt_re_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata);
 218 int bnxt_re_create_ah(struct ib_ah *ah, struct rdma_ah_init_attr *init_attr,
 219                       struct ib_udata *udata);
 220 int bnxt_re_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr);
 221 int bnxt_re_destroy_ah(struct ib_ah *ah, u32 flags);
 222 int bnxt_re_create_srq(struct ib_srq *srq,
 223                        struct ib_srq_init_attr *srq_init_attr,
 224                        struct ib_udata *udata);
 225 int bnxt_re_modify_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr,
 226                        enum ib_srq_attr_mask srq_attr_mask,
 227                        struct ib_udata *udata);
 228 int bnxt_re_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr);
 229 int bnxt_re_destroy_srq(struct ib_srq *srq, struct ib_udata *udata);
 230 int bnxt_re_post_srq_recv(struct ib_srq *srq, const struct ib_recv_wr *recv_wr,
 231                           const struct ib_recv_wr **bad_recv_wr);
 232 int bnxt_re_create_qp(struct ib_qp *qp, struct ib_qp_init_attr *qp_init_attr,
 233                       struct ib_udata *udata);
 234 int bnxt_re_modify_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
 235                       int qp_attr_mask, struct ib_udata *udata);
 236 int bnxt_re_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
 237                      int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr);
 238 int bnxt_re_destroy_qp(struct ib_qp *qp, struct ib_udata *udata);
 239 int bnxt_re_post_send(struct ib_qp *qp, const struct ib_send_wr *send_wr,
 240                       const struct ib_send_wr **bad_send_wr);
 241 int bnxt_re_post_recv(struct ib_qp *qp, const struct ib_recv_wr *recv_wr,
 242                       const struct ib_recv_wr **bad_recv_wr);
 243 int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 244                       struct uverbs_attr_bundle *attrs);
 245 int bnxt_re_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
 246 int bnxt_re_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
 247 int bnxt_re_poll_cq(struct ib_cq *cq, int num_entries, struct ib_wc *wc);
 248 int bnxt_re_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
 249 struct ib_mr *bnxt_re_get_dma_mr(struct ib_pd *pd, int mr_access_flags);
 250
 251 int bnxt_re_map_mr_sg(struct ib_mr *ib_mr, struct scatterlist *sg, int sg_nents,
 252                       unsigned int *sg_offset);
 253 struct ib_mr *bnxt_re_alloc_mr(struct ib_pd *ib_pd, enum ib_mr_type mr_type,
 254                                u32 max_num_sg);
 255 int bnxt_re_dereg_mr(struct ib_mr *mr, struct ib_udata *udata);
 256 struct ib_mw *bnxt_re_alloc_mw(struct ib_pd *ib_pd, enum ib_mw_type type,
 257                                struct ib_udata *udata);
 258 int bnxt_re_dealloc_mw(struct ib_mw *mw);
 259 struct ib_mr *bnxt_re_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 260                                   u64 virt_addr, int mr_access_flags,
 261                                   struct ib_udata *udata);
 262 struct ib_mr *bnxt_re_reg_user_mr_dmabuf(struct ib_pd *ib_pd, u64 start,
 263                                          u64 length, u64 virt_addr,
 264                                          int fd, int mr_access_flags,
 265                                          struct uverbs_attr_bundle *attrs);
 266 int bnxt_re_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *udata);
 267 void bnxt_re_dealloc_ucontext(struct ib_ucontext *context);
 268 int bnxt_re_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
 269 void bnxt_re_mmap_free(struct rdma_user_mmap_entry *rdma_entry);
 270
 271
 272 unsigned long bnxt_re_lock_cqs(struct bnxt_re_qp *qp);
 273 void bnxt_re_unlock_cqs(struct bnxt_re_qp *qp, unsigned long flags);
 274 #endif /* __BNXT_RE_IB_VERBS_H__ */