LXR linux/drivers/infiniband/sw/rxe/rxe

   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
  39int rxe_av_chk_attr(struct rxe_dev *rxe, struct rdma_ah_attr *attr);
  40
  41int rxe_av_from_attr(struct rxe_dev *rxe, u8 port_num,
  42                     struct rxe_av *av, struct rdma_ah_attr *attr);
  43
  44int rxe_av_to_attr(struct rxe_dev *rxe, struct rxe_av *av,
  45                   struct rdma_ah_attr *attr);
  46
  47int rxe_av_fill_ip_info(struct rxe_dev *rxe,
  48                        struct rxe_av *av,
  49                        struct rdma_ah_attr *attr,
  50                        struct ib_gid_attr *sgid_attr,
  51                        union ib_gid *sgid);
  52
  53struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt);
  54
  55/* rxe_cq.c */
  56int rxe_cq_chk_attr(struct rxe_dev *rxe, struct rxe_cq *cq,
  57                    int cqe, int comp_vector, struct ib_udata *udata);
  58
  59int 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
  63int rxe_cq_resize_queue(struct rxe_cq *cq, int new_cqe, struct ib_udata *udata);
  64
  65int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited);
  66
  67void rxe_cq_disable(struct rxe_cq *cq);
  68
  69void rxe_cq_cleanup(struct rxe_pool_entry *arg);
  70
  71/* rxe_mcast.c */
  72int rxe_mcast_get_grp(struct rxe_dev *rxe, union ib_gid *mgid,
  73                      struct rxe_mc_grp **grp_p);
  74
  75int rxe_mcast_add_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp,
  76                           struct rxe_mc_grp *grp);
  77
  78int rxe_mcast_drop_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp,
  79                            union ib_gid *mgid);
  80
  81void rxe_drop_all_mcast_groups(struct rxe_qp *qp);
  82
  83void rxe_mc_cleanup(struct rxe_pool_entry *arg);
  84
  85/* rxe_mmap.c */
  86struct rxe_mmap_info {
  87        struct list_head        pending_mmaps;
  88        struct ib_ucontext      *context;
  89        struct kref             ref;
  90        void                    *obj;
  91
  92        struct mminfo info;
  93};
  94
  95void rxe_mmap_release(struct kref *ref);
  96
  97struct rxe_mmap_info *rxe_create_mmap_info(struct rxe_dev *dev,
  98                                           u32 size,
  99                                           struct ib_ucontext *context,
 100                                           void *obj);
 101
 102int rxe_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
 103
 104/* rxe_mr.c */
 105enum copy_direction {
 106        to_mem_obj,
 107        from_mem_obj,
 108};
 109
 110int rxe_mem_init_dma(struct rxe_dev *rxe, struct rxe_pd *pd,
 111                     int access, struct rxe_mem *mem);
 112
 113int rxe_mem_init_user(struct rxe_dev *rxe, struct rxe_pd *pd, u64 start,
 114                      u64 length, u64 iova, int access, struct ib_udata *udata,
 115                      struct rxe_mem *mr);
 116
 117int rxe_mem_init_fast(struct rxe_dev *rxe, struct rxe_pd *pd,
 118                      int max_pages, struct rxe_mem *mem);
 119
 120int rxe_mem_copy(struct rxe_mem *mem, u64 iova, void *addr,
 121                 int length, enum copy_direction dir, u32 *crcp);
 122
 123int copy_data(struct rxe_dev *rxe, struct rxe_pd *pd, int access,
 124              struct rxe_dma_info *dma, void *addr, int length,
 125              enum copy_direction dir, u32 *crcp);
 126
 127void *iova_to_vaddr(struct rxe_mem *mem, u64 iova, int length);
 128
 129enum lookup_type {
 130        lookup_local,
 131        lookup_remote,
 132};
 133
 134struct rxe_mem *lookup_mem(struct rxe_pd *pd, int access, u32 key,
 135                           enum lookup_type type);
 136
 137int mem_check_range(struct rxe_mem *mem, u64 iova, size_t length);
 138
 139int rxe_mem_map_pages(struct rxe_dev *rxe, struct rxe_mem *mem,
 140                      u64 *page, int num_pages, u64 iova);
 141
 142void rxe_mem_cleanup(struct rxe_pool_entry *arg);
 143
 144int advance_dma_data(struct rxe_dma_info *dma, unsigned int length);
 145
 146/* rxe_net.c */
 147int rxe_loopback(struct sk_buff *skb);
 148int rxe_send(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
 149             struct sk_buff *skb);
 150struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av,
 151                                int paylen, struct rxe_pkt_info *pkt);
 152int rxe_prepare(struct rxe_dev *rxe, struct rxe_pkt_info *pkt,
 153                struct sk_buff *skb, u32 *crc);
 154enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num);
 155const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num);
 156struct device *rxe_dma_device(struct rxe_dev *rxe);
 157int rxe_mcast_add(struct rxe_dev *rxe, union ib_gid *mgid);
 158int rxe_mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid);
 159
 160/* rxe_qp.c */
 161int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init);
 162
 163int 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
 167int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init);
 168
 169int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 170                    struct ib_qp_attr *attr, int mask);
 171
 172int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr,
 173                     int mask, struct ib_udata *udata);
 174
 175int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask);
 176
 177void rxe_qp_error(struct rxe_qp *qp);
 178
 179void rxe_qp_destroy(struct rxe_qp *qp);
 180
 181void rxe_qp_cleanup(struct rxe_pool_entry *arg);
 182
 183static inline int qp_num(struct rxe_qp *qp)
 184{
 185        return qp->ibqp.qp_num;
 186}
 187
 188static inline enum ib_qp_type qp_type(struct rxe_qp *qp)
 189{
 190        return qp->ibqp.qp_type;
 191}
 192
 193static inline enum ib_qp_state qp_state(struct rxe_qp *qp)
 194{
 195        return qp->attr.qp_state;
 196}
 197
 198static 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
 206static 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
 212void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res);
 213
 214static 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
 221void retransmit_timer(unsigned long data);
 222void rnr_nak_timer(unsigned long data);
 223
 224/* rxe_srq.c */
 225#define IB_SRQ_INIT_MASK (~IB_SRQ_LIMIT)
 226
 227int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 228                     struct ib_srq_attr *attr, enum ib_srq_attr_mask mask);
 229
 230int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq,
 231                      struct ib_srq_init_attr *init,
 232                      struct ib_ucontext *context, struct ib_udata *udata);
 233
 234int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 235                      struct ib_srq_attr *attr, enum ib_srq_attr_mask mask,
 236                      struct ib_udata *udata);
 237
 238void rxe_release(struct kref *kref);
 239
 240void rxe_drain_req_pkts(struct rxe_qp *qp, bool notify);
 241int rxe_completer(void *arg);
 242int rxe_requester(void *arg);
 243int rxe_responder(void *arg);
 244
 245u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb);
 246
 247void rxe_resp_queue_pkt(struct rxe_dev *rxe,
 248                        struct rxe_qp *qp, struct sk_buff *skb);
 249
 250void rxe_comp_queue_pkt(struct rxe_dev *rxe,
 251                        struct rxe_qp *qp, struct sk_buff *skb);
 252
 253static inline unsigned int wr_opcode_mask(int opcode, struct rxe_qp *qp)
 254{
 255        return rxe_wr_opcode_info[opcode].mask[qp->ibqp.qp_type];
 256}
 257
 258static inline int rxe_xmit_packet(struct rxe_dev *rxe, struct rxe_qp *qp,
 259                                  struct rxe_pkt_info *pkt, struct sk_buff *skb)
 260{
 261        int err;
 262        int is_request = pkt->mask & RXE_REQ_MASK;
 263
 264        if ((is_request && (qp->req.state != QP_STATE_READY)) ||
 265            (!is_request && (qp->resp.state != QP_STATE_READY))) {
 266                pr_info("Packet dropped. QP is not in ready state\n");
 267                goto drop;
 268        }
 269
 270        if (pkt->mask & RXE_LOOPBACK_MASK) {
 271                memcpy(SKB_TO_PKT(skb), pkt, sizeof(*pkt));
 272                err = rxe_loopback(skb);
 273        } else {
 274                err = rxe_send(rxe, pkt, skb);
 275        }
 276
 277        if (err) {
 278                rxe->xmit_errors++;
 279                rxe_counter_inc(rxe, RXE_CNT_SEND_ERR);
 280                return err;
 281        }
 282
 283        if ((qp_type(qp) != IB_QPT_RC) &&
 284            (pkt->mask & RXE_END_MASK)) {
 285                pkt->wqe->state = wqe_state_done;
 286                rxe_run_task(&qp->comp.task, 1);
 287        }
 288
 289        rxe_counter_inc(rxe, RXE_CNT_SENT_PKTS);
 290        goto done;
 291
 292drop:
 293        kfree_skb(skb);
 294        err = 0;
 295done:
 296        return err;
 297}
 298
 299#endif /* RXE_LOC_H */
 300