drivers/infiniband/core/uverbs_marshall.c

   1 /*
   2  * Copyright (c) 2005 Intel Corporation.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/export.h>
  34 #include <rdma/ib_marshall.h>
  35
  36 #define OPA_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)
  37 static int rdma_ah_conv_opa_to_ib(struct ib_device *dev,
  38                                   struct rdma_ah_attr *ib,
  39                                   struct rdma_ah_attr *opa)
  40 {
  41         struct ib_port_attr port_attr;
  42         int ret = 0;
  43
  44         /* Do structure copy and the over-write fields */
  45         *ib = *opa;
  46
  47         ib->type = RDMA_AH_ATTR_TYPE_IB;
  48         rdma_ah_set_grh(ib, NULL, 0, 0, 1, 0);
  49
  50         if (ib_query_port(dev, opa->port_num, &port_attr)) {
  51                 /* Set to default subnet to indicate error */
  52                 rdma_ah_set_subnet_prefix(ib, OPA_DEFAULT_GID_PREFIX);
  53                 ret = -EINVAL;
  54         } else {
  55                 rdma_ah_set_subnet_prefix(ib,
  56                                           cpu_to_be64(port_attr.subnet_prefix));
  57         }
  58         rdma_ah_set_interface_id(ib, OPA_MAKE_ID(rdma_ah_get_dlid(opa)));
  59         return ret;
  60 }
  61
  62 void ib_copy_ah_attr_to_user(struct ib_device *device,
  63                              struct ib_uverbs_ah_attr *dst,
  64                              struct rdma_ah_attr *ah_attr)
  65 {
  66         struct rdma_ah_attr *src = ah_attr;
  67         struct rdma_ah_attr conv_ah;
  68
  69         memset(&dst->grh.reserved, 0, sizeof(dst->grh.reserved));
  70
  71         if ((ah_attr->type == RDMA_AH_ATTR_TYPE_OPA) &&
  72             (rdma_ah_get_dlid(ah_attr) > be16_to_cpu(IB_LID_PERMISSIVE)) &&
  73             (!rdma_ah_conv_opa_to_ib(device, &conv_ah, ah_attr)))
  74                 src = &conv_ah;
  75
  76         dst->dlid                  = rdma_ah_get_dlid(src);
  77         dst->sl                    = rdma_ah_get_sl(src);
  78         dst->src_path_bits         = rdma_ah_get_path_bits(src);
  79         dst->static_rate           = rdma_ah_get_static_rate(src);
  80         dst->is_global             = rdma_ah_get_ah_flags(src) &
  81                                         IB_AH_GRH ? 1 : 0;
  82         if (dst->is_global) {
  83                 const struct ib_global_route *grh = rdma_ah_read_grh(src);
  84
  85                 memcpy(dst->grh.dgid, grh->dgid.raw, sizeof(grh->dgid));
  86                 dst->grh.flow_label        = grh->flow_label;
  87                 dst->grh.sgid_index        = grh->sgid_index;
  88                 dst->grh.hop_limit         = grh->hop_limit;
  89                 dst->grh.traffic_class     = grh->traffic_class;
  90         }
  91         dst->port_num              = rdma_ah_get_port_num(src);
  92         dst->reserved              = 0;
  93 }
  94 EXPORT_SYMBOL(ib_copy_ah_attr_to_user);
  95
  96 void ib_copy_qp_attr_to_user(struct ib_device *device,
  97                              struct ib_uverbs_qp_attr *dst,
  98                              struct ib_qp_attr *src)
  99 {
 100         dst->qp_state           = src->qp_state;
 101         dst->cur_qp_state       = src->cur_qp_state;
 102         dst->path_mtu           = src->path_mtu;
 103         dst->path_mig_state     = src->path_mig_state;
 104         dst->qkey               = src->qkey;
 105         dst->rq_psn             = src->rq_psn;
 106         dst->sq_psn             = src->sq_psn;
 107         dst->dest_qp_num        = src->dest_qp_num;
 108         dst->qp_access_flags    = src->qp_access_flags;
 109
 110         dst->max_send_wr        = src->cap.max_send_wr;
 111         dst->max_recv_wr        = src->cap.max_recv_wr;
 112         dst->max_send_sge       = src->cap.max_send_sge;
 113         dst->max_recv_sge       = src->cap.max_recv_sge;
 114         dst->max_inline_data    = src->cap.max_inline_data;
 115
 116         ib_copy_ah_attr_to_user(device, &dst->ah_attr, &src->ah_attr);
 117         ib_copy_ah_attr_to_user(device, &dst->alt_ah_attr, &src->alt_ah_attr);
 118
 119         dst->pkey_index         = src->pkey_index;
 120         dst->alt_pkey_index     = src->alt_pkey_index;
 121         dst->en_sqd_async_notify = src->en_sqd_async_notify;
 122         dst->sq_draining        = src->sq_draining;
 123         dst->max_rd_atomic      = src->max_rd_atomic;
 124         dst->max_dest_rd_atomic = src->max_dest_rd_atomic;
 125         dst->min_rnr_timer      = src->min_rnr_timer;
 126         dst->port_num           = src->port_num;
 127         dst->timeout            = src->timeout;
 128         dst->retry_cnt          = src->retry_cnt;
 129         dst->rnr_retry          = src->rnr_retry;
 130         dst->alt_port_num       = src->alt_port_num;
 131         dst->alt_timeout        = src->alt_timeout;
 132         memset(dst->reserved, 0, sizeof(dst->reserved));
 133 }
 134 EXPORT_SYMBOL(ib_copy_qp_attr_to_user);
 135
 136 static void __ib_copy_path_rec_to_user(struct ib_user_path_rec *dst,
 137                                        struct sa_path_rec *src)
 138 {
 139         memcpy(dst->dgid, src->dgid.raw, sizeof(src->dgid));
 140         memcpy(dst->sgid, src->sgid.raw, sizeof(src->sgid));
 141
 142         dst->dlid               = htons(ntohl(sa_path_get_dlid(src)));
 143         dst->slid               = htons(ntohl(sa_path_get_slid(src)));
 144         dst->raw_traffic        = sa_path_get_raw_traffic(src);
 145         dst->flow_label         = src->flow_label;
 146         dst->hop_limit          = src->hop_limit;
 147         dst->traffic_class      = src->traffic_class;
 148         dst->reversible         = src->reversible;
 149         dst->numb_path          = src->numb_path;
 150         dst->pkey               = src->pkey;
 151         dst->sl                 = src->sl;
 152         dst->mtu_selector       = src->mtu_selector;
 153         dst->mtu                = src->mtu;
 154         dst->rate_selector      = src->rate_selector;
 155         dst->rate               = src->rate;
 156         dst->packet_life_time   = src->packet_life_time;
 157         dst->preference         = src->preference;
 158         dst->packet_life_time_selector = src->packet_life_time_selector;
 159 }
 160
 161 void ib_copy_path_rec_to_user(struct ib_user_path_rec *dst,
 162                               struct sa_path_rec *src)
 163 {
 164         struct sa_path_rec rec;
 165
 166         if (src->rec_type == SA_PATH_REC_TYPE_OPA) {
 167                 sa_convert_path_opa_to_ib(&rec, src);
 168                 __ib_copy_path_rec_to_user(dst, &rec);
 169                 return;
 170         }
 171         __ib_copy_path_rec_to_user(dst, src);
 172 }
 173 EXPORT_SYMBOL(ib_copy_path_rec_to_user);
 174
 175 void ib_copy_path_rec_from_user(struct sa_path_rec *dst,
 176                                 struct ib_user_path_rec *src)
 177 {
 178         u32 slid, dlid;
 179
 180         memset(dst, 0, sizeof(*dst));
 181         if ((ib_is_opa_gid((union ib_gid *)src->sgid)) ||
 182             (ib_is_opa_gid((union ib_gid *)src->dgid))) {
 183                 dst->rec_type = SA_PATH_REC_TYPE_OPA;
 184                 slid = opa_get_lid_from_gid((union ib_gid *)src->sgid);
 185                 dlid = opa_get_lid_from_gid((union ib_gid *)src->dgid);
 186         } else {
 187                 dst->rec_type = SA_PATH_REC_TYPE_IB;
 188                 slid = ntohs(src->slid);
 189                 dlid = ntohs(src->dlid);
 190         }
 191         memcpy(dst->dgid.raw, src->dgid, sizeof dst->dgid);
 192         memcpy(dst->sgid.raw, src->sgid, sizeof dst->sgid);
 193
 194         sa_path_set_dlid(dst, dlid);
 195         sa_path_set_slid(dst, slid);
 196         sa_path_set_raw_traffic(dst, src->raw_traffic);
 197         dst->flow_label         = src->flow_label;
 198         dst->hop_limit          = src->hop_limit;
 199         dst->traffic_class      = src->traffic_class;
 200         dst->reversible         = src->reversible;
 201         dst->numb_path          = src->numb_path;
 202         dst->pkey               = src->pkey;
 203         dst->sl                 = src->sl;
 204         dst->mtu_selector       = src->mtu_selector;
 205         dst->mtu                = src->mtu;
 206         dst->rate_selector      = src->rate_selector;
 207         dst->rate               = src->rate;
 208         dst->packet_life_time   = src->packet_life_time;
 209         dst->preference         = src->preference;
 210         dst->packet_life_time_selector = src->packet_life_time_selector;
 211
 212         /* TODO: No need to set this */
 213         sa_path_set_dmac_zero(dst);
 214 }
 215 EXPORT_SYMBOL(ib_copy_path_rec_from_user);