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(struct rxe_pool_entry *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(struct rxe_pool_entry *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(struct rxe_pool_entry *arg);
 141
 142 int advance_dma_data(struct rxe_dma_info *dma, unsigned int length);
 143
 144 /* rxe_net.c */
 145 int rxe_loopback(struct sk_buff *skb);
 146 int rxe_send(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
 147              struct sk_buff *skb);
 148 __be64 rxe_port_guid(struct rxe_dev *rxe);
 149 struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av,
 150                                 int paylen, struct rxe_pkt_info *pkt);
 151 int rxe_prepare(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
 152                 struct sk_buff *skb, u32 *crc);
 153 enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num);
 154 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num);
 155 struct device *rxe_dma_device(struct rxe_dev *rxe);
 156 __be64 rxe_node_guid(struct rxe_dev *rxe);
 157 int rxe_mcast_add(struct rxe_dev *rxe, union ib_gid *mgid);
 158 int rxe_mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid);
 159
 160 /* rxe_qp.c */
 161 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init);
 162
 163 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 164                      struct ib_qp_init_attr *init, struct ib_udata *udata,
 165                      struct ib_pd *ibpd);
 166
 167 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init);
 168
 169 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 170                     struct ib_qp_attr *attr, int mask);
 171
 172 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr,
 173                      int mask, struct ib_udata *udata);
 174
 175 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask);
 176
 177 void rxe_qp_error(struct rxe_qp *qp);
 178
 179 void rxe_qp_destroy(struct rxe_qp *qp);
 180
 181 void rxe_qp_cleanup(struct rxe_pool_entry *arg);
 182
 183 static inline int qp_num(struct rxe_qp *qp)
 184 {
 185         return qp->ibqp.qp_num;
 186 }
 187
 188 static inline enum ib_qp_type qp_type(struct rxe_qp *qp)
 189 {
 190         return qp->ibqp.qp_type;
 191 }
 192
 193 static inline enum ib_qp_state qp_state(struct rxe_qp *qp)
 194 {
 195         return qp->attr.qp_state;
 196 }
 197
 198 static inline int qp_mtu(struct rxe_qp *qp)
 199 {
 200         if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC)
 201                 return qp->attr.path_mtu;
 202         else
 203                 return RXE_PORT_MAX_MTU;
 204 }
 205
 206 static inline int rcv_wqe_size(int max_sge)
 207 {
 208         return sizeof(struct rxe_recv_wqe) +
 209                 max_sge * sizeof(struct ib_sge);
 210 }
 211
 212 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res);
 213
 214 static inline void rxe_advance_resp_resource(struct rxe_qp *qp)
 215 {
 216         qp->resp.res_head++;
 217         if (unlikely(qp->resp.res_head == qp->attr.max_dest_rd_atomic))
 218                 qp->resp.res_head = 0;
 219 }
 220
 221 void retransmit_timer(unsigned long data);
 222 void rnr_nak_timer(unsigned long data);
 223
 224 void dump_qp(struct rxe_qp *qp);
 225
 226 /* rxe_srq.c */
 227 #define IB_SRQ_INIT_MASK (~IB_SRQ_LIMIT)
 228
 229 int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 230                      struct ib_srq_attr *attr, enum ib_srq_attr_mask mask);
 231
 232 int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq,
 233                       struct ib_srq_init_attr *init,
 234                       struct ib_ucontext *context, struct ib_udata *udata);
 235
 236 int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 237                       struct ib_srq_attr *attr, enum ib_srq_attr_mask mask,
 238                       struct ib_udata *udata);
 239
 240 void rxe_release(struct kref *kref);
 241
 242 void rxe_drain_req_pkts(struct rxe_qp *qp, bool notify);
 243 int rxe_completer(void *arg);
 244 int rxe_requester(void *arg);
 245 int rxe_responder(void *arg);
 246
 247 u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb);
 248
 249 void rxe_resp_queue_pkt(struct rxe_dev *rxe,
 250                         struct rxe_qp *qp, struct sk_buff *skb);
 251
 252 void rxe_comp_queue_pkt(struct rxe_dev *rxe,
 253                         struct rxe_qp *qp, struct sk_buff *skb);
 254
 255 static inline unsigned wr_opcode_mask(int opcode, struct rxe_qp *qp)
 256 {
 257         return rxe_wr_opcode_info[opcode].mask[qp->ibqp.qp_type];
 258 }
 259
 260 static inline int rxe_xmit_packet(struct rxe_dev *rxe, struct rxe_qp *qp,
 261                                   struct rxe_pkt_info *pkt, struct sk_buff *skb)
 262 {
 263         int err;
 264         int is_request = pkt->mask & RXE_REQ_MASK;
 265
 266         if ((is_request && (qp->req.state != QP_STATE_READY)) ||
 267             (!is_request && (qp->resp.state != QP_STATE_READY))) {
 268                 pr_info("Packet dropped. QP is not in ready state\n");
 269                 goto drop;
 270         }
 271
 272         if (pkt->mask & RXE_LOOPBACK_MASK) {
 273                 memcpy(SKB_TO_PKT(skb), pkt, sizeof(*pkt));
 274                 err = rxe_loopback(skb);
 275         } else {
 276                 err = rxe_send(rxe, pkt, skb);
 277         }
 278
 279         if (err) {
 280                 rxe->xmit_errors++;
 281                 return err;
 282         }
 283
 284         if ((qp_type(qp) != IB_QPT_RC) &&
 285             (pkt->mask & RXE_END_MASK)) {
 286                 pkt->wqe->state = wqe_state_done;
 287                 rxe_run_task(&qp->comp.task, 1);
 288         }
 289
 290         goto done;
 291
 292 drop:
 293         kfree_skb(skb);
 294         err = 0;
 295 done:
 296         return err;
 297 }
 298
 299 #endif /* RXE_LOC_H */