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 void rxe_init_av(struct rdma_ah_attr *attr, struct rxe_av *av);
  39
  40 int rxe_av_chk_attr(struct rxe_dev *rxe, struct rdma_ah_attr *attr);
  41
  42 void rxe_av_from_attr(u8 port_num, struct rxe_av *av,
  43                      struct rdma_ah_attr *attr);
  44
  45 void rxe_av_to_attr(struct rxe_av *av, struct rdma_ah_attr *attr);
  46
  47 void rxe_av_fill_ip_info(struct rxe_av *av, struct rdma_ah_attr *attr);
  48
  49 struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt);
  50
  51 /* rxe_cq.c */
  52 int rxe_cq_chk_attr(struct rxe_dev *rxe, struct rxe_cq *cq,
  53                     int cqe, int comp_vector);
  54
  55 int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe,
  56                      int comp_vector, struct ib_udata *udata,
  57                      struct rxe_create_cq_resp __user *uresp);
  58
  59 int rxe_cq_resize_queue(struct rxe_cq *cq, int new_cqe,
  60                         struct rxe_resize_cq_resp __user *uresp,
  61                         struct ib_udata *udata);
  62
  63 int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited);
  64
  65 void rxe_cq_disable(struct rxe_cq *cq);
  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, u32 size,
  96                                            struct ib_udata *udata, 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_pkt_info *pkt, struct sk_buff *skb, u32 *crc);
 148 enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num);
 149 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num);
 150 struct device *rxe_dma_device(struct rxe_dev *rxe);
 151 int rxe_mcast_add(struct rxe_dev *rxe, union ib_gid *mgid);
 152 int rxe_mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid);
 153
 154 /* rxe_qp.c */
 155 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init);
 156
 157 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 158                      struct ib_qp_init_attr *init,
 159                      struct rxe_create_qp_resp __user *uresp,
 160                      struct ib_pd *ibpd, struct ib_udata *udata);
 161
 162 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init);
 163
 164 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 165                     struct ib_qp_attr *attr, int mask);
 166
 167 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr,
 168                      int mask, struct ib_udata *udata);
 169
 170 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask);
 171
 172 void rxe_qp_error(struct rxe_qp *qp);
 173
 174 void rxe_qp_destroy(struct rxe_qp *qp);
 175
 176 void rxe_qp_cleanup(struct rxe_pool_entry *arg);
 177
 178 static inline int qp_num(struct rxe_qp *qp)
 179 {
 180         return qp->ibqp.qp_num;
 181 }
 182
 183 static inline enum ib_qp_type qp_type(struct rxe_qp *qp)
 184 {
 185         return qp->ibqp.qp_type;
 186 }
 187
 188 static inline enum ib_qp_state qp_state(struct rxe_qp *qp)
 189 {
 190         return qp->attr.qp_state;
 191 }
 192
 193 static inline int qp_mtu(struct rxe_qp *qp)
 194 {
 195         if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC)
 196                 return qp->attr.path_mtu;
 197         else
 198                 return IB_MTU_4096;
 199 }
 200
 201 static inline int rcv_wqe_size(int max_sge)
 202 {
 203         return sizeof(struct rxe_recv_wqe) +
 204                 max_sge * sizeof(struct ib_sge);
 205 }
 206
 207 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res);
 208
 209 static inline void rxe_advance_resp_resource(struct rxe_qp *qp)
 210 {
 211         qp->resp.res_head++;
 212         if (unlikely(qp->resp.res_head == qp->attr.max_dest_rd_atomic))
 213                 qp->resp.res_head = 0;
 214 }
 215
 216 void retransmit_timer(struct timer_list *t);
 217 void rnr_nak_timer(struct timer_list *t);
 218
 219 /* rxe_srq.c */
 220 #define IB_SRQ_INIT_MASK (~IB_SRQ_LIMIT)
 221
 222 int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 223                      struct ib_srq_attr *attr, enum ib_srq_attr_mask mask);
 224
 225 int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq,
 226                       struct ib_srq_init_attr *init, struct ib_udata *udata,
 227                       struct rxe_create_srq_resp __user *uresp);
 228
 229 int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 230                       struct ib_srq_attr *attr, enum ib_srq_attr_mask mask,
 231                       struct rxe_modify_srq_cmd *ucmd, struct ib_udata *udata);
 232
 233 void rxe_dealloc(struct ib_device *ib_dev);
 234
 235 int rxe_completer(void *arg);
 236 int rxe_requester(void *arg);
 237 int rxe_responder(void *arg);
 238
 239 u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb);
 240
 241 void rxe_resp_queue_pkt(struct rxe_qp *qp, struct sk_buff *skb);
 242
 243 void rxe_comp_queue_pkt(struct rxe_qp *qp, struct sk_buff *skb);
 244
 245 static inline unsigned int wr_opcode_mask(int opcode, struct rxe_qp *qp)
 246 {
 247         return rxe_wr_opcode_info[opcode].mask[qp->ibqp.qp_type];
 248 }
 249
 250 static inline int rxe_xmit_packet(struct rxe_qp *qp, struct rxe_pkt_info *pkt,
 251                                   struct sk_buff *skb)
 252 {
 253         int err;
 254         int is_request = pkt->mask & RXE_REQ_MASK;
 255         struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 256
 257         if ((is_request && (qp->req.state != QP_STATE_READY)) ||
 258             (!is_request && (qp->resp.state != QP_STATE_READY))) {
 259                 pr_info("Packet dropped. QP is not in ready state\n");
 260                 goto drop;
 261         }
 262
 263         if (pkt->mask & RXE_LOOPBACK_MASK) {
 264                 memcpy(SKB_TO_PKT(skb), pkt, sizeof(*pkt));
 265                 rxe_loopback(skb);
 266                 err = 0;
 267         } else {
 268                 err = rxe_send(pkt, skb);
 269         }
 270
 271         if (err) {
 272                 rxe->xmit_errors++;
 273                 rxe_counter_inc(rxe, RXE_CNT_SEND_ERR);
 274                 return err;
 275         }
 276
 277         if ((qp_type(qp) != IB_QPT_RC) &&
 278             (pkt->mask & RXE_END_MASK)) {
 279                 pkt->wqe->state = wqe_state_done;
 280                 rxe_run_task(&qp->comp.task, 1);
 281         }
 282
 283         rxe_counter_inc(rxe, RXE_CNT_SENT_PKTS);
 284         goto done;
 285
 286 drop:
 287         kfree_skb(skb);
 288         err = 0;
 289 done:
 290         return err;
 291 }
 292
 293 #endif /* RXE_LOC_H */