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 rdma_ah_attr *attr);
  40
  41 void rxe_av_from_attr(u8 port_num, struct rxe_av *av,
  42                      struct rdma_ah_attr *attr);
  43
  44 void rxe_av_to_attr(struct rxe_av *av, struct rdma_ah_attr *attr);
  45
  46 void rxe_av_fill_ip_info(struct rxe_av *av, struct rdma_ah_attr *attr);
  47
  48 struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt);
  49
  50 /* rxe_cq.c */
  51 int rxe_cq_chk_attr(struct rxe_dev *rxe, struct rxe_cq *cq,
  52                     int cqe, int comp_vector);
  53
  54 int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe,
  55                      int comp_vector, struct ib_ucontext *context,
  56                      struct rxe_create_cq_resp __user *uresp);
  57
  58 int rxe_cq_resize_queue(struct rxe_cq *cq, int new_cqe,
  59                         struct rxe_resize_cq_resp __user *uresp);
  60
  61 int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited);
  62
  63 void rxe_cq_disable(struct rxe_cq *cq);
  64
  65 void rxe_cq_cleanup(struct rxe_pool_entry *arg);
  66
  67 /* rxe_mcast.c */
  68 int rxe_mcast_get_grp(struct rxe_dev *rxe, union ib_gid *mgid,
  69                       struct rxe_mc_grp **grp_p);
  70
  71 int rxe_mcast_add_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp,
  72                            struct rxe_mc_grp *grp);
  73
  74 int rxe_mcast_drop_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp,
  75                             union ib_gid *mgid);
  76
  77 void rxe_drop_all_mcast_groups(struct rxe_qp *qp);
  78
  79 void rxe_mc_cleanup(struct rxe_pool_entry *arg);
  80
  81 /* rxe_mmap.c */
  82 struct rxe_mmap_info {
  83         struct list_head        pending_mmaps;
  84         struct ib_ucontext      *context;
  85         struct kref             ref;
  86         void                    *obj;
  87
  88         struct mminfo info;
  89 };
  90
  91 void rxe_mmap_release(struct kref *ref);
  92
  93 struct rxe_mmap_info *rxe_create_mmap_info(struct rxe_dev *dev,
  94                                            u32 size,
  95                                            struct ib_ucontext *context,
  96                                            void *obj);
  97
  98 int rxe_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
  99
 100 /* rxe_mr.c */
 101 enum copy_direction {
 102         to_mem_obj,
 103         from_mem_obj,
 104 };
 105
 106 int rxe_mem_init_dma(struct rxe_pd *pd,
 107                      int access, struct rxe_mem *mem);
 108
 109 int rxe_mem_init_user(struct rxe_pd *pd, u64 start,
 110                       u64 length, u64 iova, int access, struct ib_udata *udata,
 111                       struct rxe_mem *mr);
 112
 113 int rxe_mem_init_fast(struct rxe_pd *pd,
 114                       int max_pages, struct rxe_mem *mem);
 115
 116 int rxe_mem_copy(struct rxe_mem *mem, u64 iova, void *addr,
 117                  int length, enum copy_direction dir, u32 *crcp);
 118
 119 int copy_data(struct rxe_pd *pd, int access,
 120               struct rxe_dma_info *dma, void *addr, int length,
 121               enum copy_direction dir, u32 *crcp);
 122
 123 void *iova_to_vaddr(struct rxe_mem *mem, u64 iova, int length);
 124
 125 enum lookup_type {
 126         lookup_local,
 127         lookup_remote,
 128 };
 129
 130 struct rxe_mem *lookup_mem(struct rxe_pd *pd, int access, u32 key,
 131                            enum lookup_type type);
 132
 133 int mem_check_range(struct rxe_mem *mem, u64 iova, size_t length);
 134
 135 int rxe_mem_map_pages(struct rxe_dev *rxe, struct rxe_mem *mem,
 136                       u64 *page, int num_pages, u64 iova);
 137
 138 void rxe_mem_cleanup(struct rxe_pool_entry *arg);
 139
 140 int advance_dma_data(struct rxe_dma_info *dma, unsigned int length);
 141
 142 /* rxe_net.c */
 143 void rxe_loopback(struct sk_buff *skb);
 144 int rxe_send(struct rxe_pkt_info *pkt, struct sk_buff *skb);
 145 struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av,
 146                                 int paylen, struct rxe_pkt_info *pkt);
 147 int rxe_prepare(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
 148                 struct sk_buff *skb, u32 *crc);
 149 enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num);
 150 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num);
 151 struct device *rxe_dma_device(struct rxe_dev *rxe);
 152 int rxe_mcast_add(struct rxe_dev *rxe, union ib_gid *mgid);
 153 int rxe_mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid);
 154
 155 /* rxe_qp.c */
 156 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init);
 157
 158 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 159                      struct ib_qp_init_attr *init,
 160                      struct rxe_create_qp_resp __user *uresp,
 161                      struct ib_pd *ibpd);
 162
 163 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init);
 164
 165 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 166                     struct ib_qp_attr *attr, int mask);
 167
 168 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr,
 169                      int mask, struct ib_udata *udata);
 170
 171 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask);
 172
 173 void rxe_qp_error(struct rxe_qp *qp);
 174
 175 void rxe_qp_destroy(struct rxe_qp *qp);
 176
 177 void rxe_qp_cleanup(struct rxe_pool_entry *arg);
 178
 179 static inline int qp_num(struct rxe_qp *qp)
 180 {
 181         return qp->ibqp.qp_num;
 182 }
 183
 184 static inline enum ib_qp_type qp_type(struct rxe_qp *qp)
 185 {
 186         return qp->ibqp.qp_type;
 187 }
 188
 189 static inline enum ib_qp_state qp_state(struct rxe_qp *qp)
 190 {
 191         return qp->attr.qp_state;
 192 }
 193
 194 static inline int qp_mtu(struct rxe_qp *qp)
 195 {
 196         if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC)
 197                 return qp->attr.path_mtu;
 198         else
 199                 return RXE_PORT_MAX_MTU;
 200 }
 201
 202 static inline int rcv_wqe_size(int max_sge)
 203 {
 204         return sizeof(struct rxe_recv_wqe) +
 205                 max_sge * sizeof(struct ib_sge);
 206 }
 207
 208 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res);
 209
 210 static inline void rxe_advance_resp_resource(struct rxe_qp *qp)
 211 {
 212         qp->resp.res_head++;
 213         if (unlikely(qp->resp.res_head == qp->attr.max_dest_rd_atomic))
 214                 qp->resp.res_head = 0;
 215 }
 216
 217 void retransmit_timer(struct timer_list *t);
 218 void rnr_nak_timer(struct timer_list *t);
 219
 220 /* rxe_srq.c */
 221 #define IB_SRQ_INIT_MASK (~IB_SRQ_LIMIT)
 222
 223 int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 224                      struct ib_srq_attr *attr, enum ib_srq_attr_mask mask);
 225
 226 int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq,
 227                       struct ib_srq_init_attr *init,
 228                       struct ib_ucontext *context,
 229                       struct rxe_create_srq_resp __user *uresp);
 230
 231 int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 232                       struct ib_srq_attr *attr, enum ib_srq_attr_mask mask,
 233                       struct rxe_modify_srq_cmd *ucmd);
 234
 235 void rxe_release(struct kref *kref);
 236
 237 int rxe_completer(void *arg);
 238 int rxe_requester(void *arg);
 239 int rxe_responder(void *arg);
 240
 241 u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb);
 242
 243 void rxe_resp_queue_pkt(struct rxe_dev *rxe,
 244                         struct rxe_qp *qp, struct sk_buff *skb);
 245
 246 void rxe_comp_queue_pkt(struct rxe_dev *rxe,
 247                         struct rxe_qp *qp, struct sk_buff *skb);
 248
 249 static inline unsigned int wr_opcode_mask(int opcode, struct rxe_qp *qp)
 250 {
 251         return rxe_wr_opcode_info[opcode].mask[qp->ibqp.qp_type];
 252 }
 253
 254 static inline int rxe_xmit_packet(struct rxe_dev *rxe, struct rxe_qp *qp,
 255                                   struct rxe_pkt_info *pkt, struct sk_buff *skb)
 256 {
 257         int err;
 258         int is_request = pkt->mask & RXE_REQ_MASK;
 259
 260         if ((is_request && (qp->req.state != QP_STATE_READY)) ||
 261             (!is_request && (qp->resp.state != QP_STATE_READY))) {
 262                 pr_info("Packet dropped. QP is not in ready state\n");
 263                 goto drop;
 264         }
 265
 266         if (pkt->mask & RXE_LOOPBACK_MASK) {
 267                 memcpy(SKB_TO_PKT(skb), pkt, sizeof(*pkt));
 268                 rxe_loopback(skb);
 269                 err = 0;
 270         } else {
 271                 err = rxe_send(pkt, skb);
 272         }
 273
 274         if (err) {
 275                 rxe->xmit_errors++;
 276                 rxe_counter_inc(rxe, RXE_CNT_SEND_ERR);
 277                 return err;
 278         }
 279
 280         if ((qp_type(qp) != IB_QPT_RC) &&
 281             (pkt->mask & RXE_END_MASK)) {
 282                 pkt->wqe->state = wqe_state_done;
 283                 rxe_run_task(&qp->comp.task, 1);
 284         }
 285
 286         rxe_counter_inc(rxe, RXE_CNT_SENT_PKTS);
 287         goto done;
 288
 289 drop:
 290         kfree_skb(skb);
 291         err = 0;
 292 done:
 293         return err;
 294 }
 295
 296 #endif /* RXE_LOC_H */