drivers/infiniband/sw/rxe/rxe_loc.h

   1 /*
   2  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
   3  * Copyright (c) 2015 System Fabric Works, Inc. 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 RXE_LOC_H
  35 #define RXE_LOC_H
  36
  37 /* rxe_av.c */
  38
  39 int rxe_av_chk_attr(struct rxe_dev *rxe, struct ib_ah_attr *attr);
  40
  41 int rxe_av_from_attr(struct rxe_dev *rxe, u8 port_num,
  42                      struct rxe_av *av, struct ib_ah_attr *attr);
  43
  44 int rxe_av_to_attr(struct rxe_dev *rxe, struct rxe_av *av,
  45                    struct ib_ah_attr *attr);
  46
  47 int rxe_av_fill_ip_info(struct rxe_dev *rxe,
  48                         struct rxe_av *av,
  49                         struct ib_ah_attr *attr,
  50                         struct ib_gid_attr *sgid_attr,
  51                         union ib_gid *sgid);
  52
  53 struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt);
  54
  55 /* rxe_cq.c */
  56 int rxe_cq_chk_attr(struct rxe_dev *rxe, struct rxe_cq *cq,
  57                     int cqe, int comp_vector, struct ib_udata *udata);
  58
  59 int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe,
  60                      int comp_vector, struct ib_ucontext *context,
  61                      struct ib_udata *udata);
  62
  63 int rxe_cq_resize_queue(struct rxe_cq *cq, int new_cqe, struct ib_udata *udata);
  64
  65 int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited);
  66
  67 void rxe_cq_cleanup(void *arg);
  68
  69 /* rxe_mcast.c */
  70 int rxe_mcast_get_grp(struct rxe_dev *rxe, union ib_gid *mgid,
  71                       struct rxe_mc_grp **grp_p);
  72
  73 int rxe_mcast_add_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp,
  74                            struct rxe_mc_grp *grp);
  75
  76 int rxe_mcast_drop_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp,
  77                             union ib_gid *mgid);
  78
  79 void rxe_drop_all_mcast_groups(struct rxe_qp *qp);
  80
  81 void rxe_mc_cleanup(void *arg);
  82
  83 /* rxe_mmap.c */
  84 struct rxe_mmap_info {
  85         struct list_head        pending_mmaps;
  86         struct ib_ucontext      *context;
  87         struct kref             ref;
  88         void                    *obj;
  89
  90         struct mminfo info;
  91 };
  92
  93 void rxe_mmap_release(struct kref *ref);
  94
  95 struct rxe_mmap_info *rxe_create_mmap_info(struct rxe_dev *dev,
  96                                            u32 size,
  97                                            struct ib_ucontext *context,
  98                                            void *obj);
  99
 100 int rxe_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
 101
 102 /* rxe_mr.c */
 103 enum copy_direction {
 104         to_mem_obj,
 105         from_mem_obj,
 106 };
 107
 108 int rxe_mem_init_dma(struct rxe_dev *rxe, struct rxe_pd *pd,
 109                      int access, struct rxe_mem *mem);
 110
 111 int rxe_mem_init_user(struct rxe_dev *rxe, struct rxe_pd *pd, u64 start,
 112                       u64 length, u64 iova, int access, struct ib_udata *udata,
 113                       struct rxe_mem *mr);
 114
 115 int rxe_mem_init_fast(struct rxe_dev *rxe, struct rxe_pd *pd,
 116                       int max_pages, struct rxe_mem *mem);
 117
 118 int rxe_mem_copy(struct rxe_mem *mem, u64 iova, void *addr,
 119                  int length, enum copy_direction dir, u32 *crcp);
 120
 121 int copy_data(struct rxe_dev *rxe, struct rxe_pd *pd, int access,
 122               struct rxe_dma_info *dma, void *addr, int length,
 123               enum copy_direction dir, u32 *crcp);
 124
 125 void *iova_to_vaddr(struct rxe_mem *mem, u64 iova, int length);
 126
 127 enum lookup_type {
 128         lookup_local,
 129         lookup_remote,
 130 };
 131
 132 struct rxe_mem *lookup_mem(struct rxe_pd *pd, int access, u32 key,
 133                            enum lookup_type type);
 134
 135 int mem_check_range(struct rxe_mem *mem, u64 iova, size_t length);
 136
 137 int rxe_mem_map_pages(struct rxe_dev *rxe, struct rxe_mem *mem,
 138                       u64 *page, int num_pages, u64 iova);
 139
 140 void rxe_mem_cleanup(void *arg);
 141
 142 int advance_dma_data(struct rxe_dma_info *dma, unsigned int length);
 143
 144 /* rxe_qp.c */
 145 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init);
 146
 147 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 148                      struct ib_qp_init_attr *init, struct ib_udata *udata,
 149                      struct ib_pd *ibpd);
 150
 151 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init);
 152
 153 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 154                     struct ib_qp_attr *attr, int mask);
 155
 156 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr,
 157                      int mask, struct ib_udata *udata);
 158
 159 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask);
 160
 161 void rxe_qp_error(struct rxe_qp *qp);
 162
 163 void rxe_qp_destroy(struct rxe_qp *qp);
 164
 165 void rxe_qp_cleanup(void *arg);
 166
 167 static inline int qp_num(struct rxe_qp *qp)
 168 {
 169         return qp->ibqp.qp_num;
 170 }
 171
 172 static inline enum ib_qp_type qp_type(struct rxe_qp *qp)
 173 {
 174         return qp->ibqp.qp_type;
 175 }
 176
 177 static inline enum ib_qp_state qp_state(struct rxe_qp *qp)
 178 {
 179         return qp->attr.qp_state;
 180 }
 181
 182 static inline int qp_mtu(struct rxe_qp *qp)
 183 {
 184         if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC)
 185                 return qp->attr.path_mtu;
 186         else
 187                 return RXE_PORT_MAX_MTU;
 188 }
 189
 190 static inline int rcv_wqe_size(int max_sge)
 191 {
 192         return sizeof(struct rxe_recv_wqe) +
 193                 max_sge * sizeof(struct ib_sge);
 194 }
 195
 196 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res);
 197
 198 static inline void rxe_advance_resp_resource(struct rxe_qp *qp)
 199 {
 200         qp->resp.res_head++;
 201         if (unlikely(qp->resp.res_head == qp->attr.max_dest_rd_atomic))
 202                 qp->resp.res_head = 0;
 203 }
 204
 205 void retransmit_timer(unsigned long data);
 206 void rnr_nak_timer(unsigned long data);
 207
 208 void dump_qp(struct rxe_qp *qp);
 209
 210 /* rxe_srq.c */
 211 #define IB_SRQ_INIT_MASK (~IB_SRQ_LIMIT)
 212
 213 int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 214                      struct ib_srq_attr *attr, enum ib_srq_attr_mask mask);
 215
 216 int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq,
 217                       struct ib_srq_init_attr *init,
 218                       struct ib_ucontext *context, struct ib_udata *udata);
 219
 220 int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 221                       struct ib_srq_attr *attr, enum ib_srq_attr_mask mask,
 222                       struct ib_udata *udata);
 223
 224 extern struct ib_dma_mapping_ops rxe_dma_mapping_ops;
 225
 226 void rxe_release(struct kref *kref);
 227
 228 int rxe_completer(void *arg);
 229 int rxe_requester(void *arg);
 230 int rxe_responder(void *arg);
 231
 232 u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb);
 233
 234 void rxe_resp_queue_pkt(struct rxe_dev *rxe,
 235                         struct rxe_qp *qp, struct sk_buff *skb);
 236
 237 void rxe_comp_queue_pkt(struct rxe_dev *rxe,
 238                         struct rxe_qp *qp, struct sk_buff *skb);
 239
 240 static inline unsigned wr_opcode_mask(int opcode, struct rxe_qp *qp)
 241 {
 242         return rxe_wr_opcode_info[opcode].mask[qp->ibqp.qp_type];
 243 }
 244
 245 static inline int rxe_xmit_packet(struct rxe_dev *rxe, struct rxe_qp *qp,
 246                                   struct rxe_pkt_info *pkt, struct sk_buff *skb)
 247 {
 248         int err;
 249         int is_request = pkt->mask & RXE_REQ_MASK;
 250
 251         if ((is_request && (qp->req.state != QP_STATE_READY)) ||
 252             (!is_request && (qp->resp.state != QP_STATE_READY))) {
 253                 pr_info("Packet dropped. QP is not in ready state\n");
 254                 goto drop;
 255         }
 256
 257         if (pkt->mask & RXE_LOOPBACK_MASK) {
 258                 memcpy(SKB_TO_PKT(skb), pkt, sizeof(*pkt));
 259                 err = rxe->ifc_ops->loopback(skb);
 260         } else {
 261                 err = rxe->ifc_ops->send(rxe, pkt, skb);
 262         }
 263
 264         if (err) {
 265                 rxe->xmit_errors++;
 266                 return err;
 267         }
 268
 269         atomic_inc(&qp->skb_out);
 270
 271         if ((qp_type(qp) != IB_QPT_RC) &&
 272             (pkt->mask & RXE_END_MASK)) {
 273                 pkt->wqe->state = wqe_state_done;
 274                 rxe_run_task(&qp->comp.task, 1);
 275         }
 276
 277         goto done;
 278
 279 drop:
 280         kfree_skb(skb);
 281         err = 0;
 282 done:
 283         return err;
 284 }
 285
 286 #endif /* RXE_LOC_H */