drivers/infiniband/hw/cxgb4/restrack.c

   1 /*
   2  * Copyright (c) 2018 Chelsio, Inc. 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 <rdma/rdma_cm.h>
  34
  35 #include "iw_cxgb4.h"
  36 #include <rdma/restrack.h>
  37 #include <uapi/rdma/rdma_netlink.h>
  38
  39 static int fill_sq(struct sk_buff *msg, struct t4_wq *wq)
  40 {
  41         /* WQ+SQ */
  42         if (rdma_nl_put_driver_u32(msg, "sqid", wq->sq.qid))
  43                 goto err;
  44         if (rdma_nl_put_driver_u32(msg, "flushed", wq->flushed))
  45                 goto err;
  46         if (rdma_nl_put_driver_u32(msg, "memsize", wq->sq.memsize))
  47                 goto err;
  48         if (rdma_nl_put_driver_u32(msg, "cidx", wq->sq.cidx))
  49                 goto err;
  50         if (rdma_nl_put_driver_u32(msg, "pidx", wq->sq.pidx))
  51                 goto err;
  52         if (rdma_nl_put_driver_u32(msg, "wq_pidx", wq->sq.wq_pidx))
  53                 goto err;
  54         if (rdma_nl_put_driver_u32(msg, "flush_cidx", wq->sq.flush_cidx))
  55                 goto err;
  56         if (rdma_nl_put_driver_u32(msg, "in_use", wq->sq.in_use))
  57                 goto err;
  58         if (rdma_nl_put_driver_u32(msg, "size", wq->sq.size))
  59                 goto err;
  60         if (rdma_nl_put_driver_u32_hex(msg, "flags", wq->sq.flags))
  61                 goto err;
  62         return 0;
  63 err:
  64         return -EMSGSIZE;
  65 }
  66
  67 static int fill_rq(struct sk_buff *msg, struct t4_wq *wq)
  68 {
  69         /* RQ */
  70         if (rdma_nl_put_driver_u32(msg, "rqid", wq->rq.qid))
  71                 goto err;
  72         if (rdma_nl_put_driver_u32(msg, "memsize", wq->rq.memsize))
  73                 goto err;
  74         if (rdma_nl_put_driver_u32(msg, "cidx", wq->rq.cidx))
  75                 goto err;
  76         if (rdma_nl_put_driver_u32(msg, "pidx", wq->rq.pidx))
  77                 goto err;
  78         if (rdma_nl_put_driver_u32(msg, "wq_pidx", wq->rq.wq_pidx))
  79                 goto err;
  80         if (rdma_nl_put_driver_u32(msg, "msn", wq->rq.msn))
  81                 goto err;
  82         if (rdma_nl_put_driver_u32_hex(msg, "rqt_hwaddr", wq->rq.rqt_hwaddr))
  83                 goto err;
  84         if (rdma_nl_put_driver_u32(msg, "rqt_size", wq->rq.rqt_size))
  85                 goto err;
  86         if (rdma_nl_put_driver_u32(msg, "in_use", wq->rq.in_use))
  87                 goto err;
  88         if (rdma_nl_put_driver_u32(msg, "size", wq->rq.size))
  89                 goto err;
  90         return 0;
  91 err:
  92         return -EMSGSIZE;
  93 }
  94
  95 static int fill_swsqe(struct sk_buff *msg, struct t4_sq *sq, u16 idx,
  96                       struct t4_swsqe *sqe)
  97 {
  98         if (rdma_nl_put_driver_u32(msg, "idx", idx))
  99                 goto err;
 100         if (rdma_nl_put_driver_u32(msg, "opcode", sqe->opcode))
 101                 goto err;
 102         if (rdma_nl_put_driver_u32(msg, "complete", sqe->complete))
 103                 goto err;
 104         if (sqe->complete &&
 105             rdma_nl_put_driver_u32(msg, "cqe_status", CQE_STATUS(&sqe->cqe)))
 106                 goto err;
 107         if (rdma_nl_put_driver_u32(msg, "signaled", sqe->signaled))
 108                 goto err;
 109         if (rdma_nl_put_driver_u32(msg, "flushed", sqe->flushed))
 110                 goto err;
 111         return 0;
 112 err:
 113         return -EMSGSIZE;
 114 }
 115
 116 /*
 117  * Dump the first and last pending sqes.
 118  */
 119 static int fill_swsqes(struct sk_buff *msg, struct t4_sq *sq,
 120                        u16 first_idx, struct t4_swsqe *first_sqe,
 121                        u16 last_idx, struct t4_swsqe *last_sqe)
 122 {
 123         if (!first_sqe)
 124                 goto out;
 125         if (fill_swsqe(msg, sq, first_idx, first_sqe))
 126                 goto err;
 127         if (!last_sqe)
 128                 goto out;
 129         if (fill_swsqe(msg, sq, last_idx, last_sqe))
 130                 goto err;
 131 out:
 132         return 0;
 133 err:
 134         return -EMSGSIZE;
 135 }
 136
 137 static int fill_res_qp_entry(struct sk_buff *msg,
 138                              struct rdma_restrack_entry *res)
 139 {
 140         struct ib_qp *ibqp = container_of(res, struct ib_qp, res);
 141         struct t4_swsqe *fsp = NULL, *lsp = NULL;
 142         struct c4iw_qp *qhp = to_c4iw_qp(ibqp);
 143         u16 first_sq_idx = 0, last_sq_idx = 0;
 144         struct t4_swsqe first_sqe, last_sqe;
 145         struct nlattr *table_attr;
 146         struct t4_wq wq;
 147
 148         /* User qp state is not available, so don't dump user qps */
 149         if (qhp->ucontext)
 150                 return 0;
 151
 152         table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_DRIVER);
 153         if (!table_attr)
 154                 goto err;
 155
 156         /* Get a consistent snapshot */
 157         spin_lock_irq(&qhp->lock);
 158         wq = qhp->wq;
 159
 160         /* If there are any pending sqes, copy the first and last */
 161         if (wq.sq.cidx != wq.sq.pidx) {
 162                 first_sq_idx = wq.sq.cidx;
 163                 first_sqe = qhp->wq.sq.sw_sq[first_sq_idx];
 164                 fsp = &first_sqe;
 165                 last_sq_idx = wq.sq.pidx;
 166                 if (last_sq_idx-- == 0)
 167                         last_sq_idx = wq.sq.size - 1;
 168                 if (last_sq_idx != first_sq_idx) {
 169                         last_sqe = qhp->wq.sq.sw_sq[last_sq_idx];
 170                         lsp = &last_sqe;
 171                 }
 172         }
 173         spin_unlock_irq(&qhp->lock);
 174
 175         if (fill_sq(msg, &wq))
 176                 goto err_cancel_table;
 177
 178         if (fill_swsqes(msg, &wq.sq, first_sq_idx, fsp, last_sq_idx, lsp))
 179                 goto err_cancel_table;
 180
 181         if (fill_rq(msg, &wq))
 182                 goto err_cancel_table;
 183
 184         nla_nest_end(msg, table_attr);
 185         return 0;
 186
 187 err_cancel_table:
 188         nla_nest_cancel(msg, table_attr);
 189 err:
 190         return -EMSGSIZE;
 191 }
 192
 193 union union_ep {
 194         struct c4iw_listen_ep lep;
 195         struct c4iw_ep ep;
 196 };
 197
 198 static int fill_res_ep_entry(struct sk_buff *msg,
 199                              struct rdma_restrack_entry *res)
 200 {
 201         struct rdma_cm_id *cm_id = rdma_res_to_id(res);
 202         struct nlattr *table_attr;
 203         struct c4iw_ep_common *epcp;
 204         struct c4iw_listen_ep *listen_ep = NULL;
 205         struct c4iw_ep *ep = NULL;
 206         struct iw_cm_id *iw_cm_id;
 207         union union_ep *uep;
 208
 209         iw_cm_id = rdma_iw_cm_id(cm_id);
 210         if (!iw_cm_id)
 211                 return 0;
 212         epcp = (struct c4iw_ep_common *)iw_cm_id->provider_data;
 213         if (!epcp)
 214                 return 0;
 215         uep = kcalloc(1, sizeof(*uep), GFP_KERNEL);
 216         if (!uep)
 217                 return 0;
 218
 219         table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_DRIVER);
 220         if (!table_attr)
 221                 goto err_free_uep;
 222
 223         /* Get a consistent snapshot */
 224         mutex_lock(&epcp->mutex);
 225         if (epcp->state == LISTEN) {
 226                 uep->lep = *(struct c4iw_listen_ep *)epcp;
 227                 mutex_unlock(&epcp->mutex);
 228                 listen_ep = &uep->lep;
 229                 epcp = &listen_ep->com;
 230         } else {
 231                 uep->ep = *(struct c4iw_ep *)epcp;
 232                 mutex_unlock(&epcp->mutex);
 233                 ep = &uep->ep;
 234                 epcp = &ep->com;
 235         }
 236
 237         if (rdma_nl_put_driver_u32(msg, "state", epcp->state))
 238                 goto err_cancel_table;
 239         if (rdma_nl_put_driver_u64_hex(msg, "flags", epcp->flags))
 240                 goto err_cancel_table;
 241         if (rdma_nl_put_driver_u64_hex(msg, "history", epcp->history))
 242                 goto err_cancel_table;
 243
 244         if (epcp->state == LISTEN) {
 245                 if (rdma_nl_put_driver_u32(msg, "stid", listen_ep->stid))
 246                         goto err_cancel_table;
 247                 if (rdma_nl_put_driver_u32(msg, "backlog", listen_ep->backlog))
 248                         goto err_cancel_table;
 249         } else {
 250                 if (rdma_nl_put_driver_u32(msg, "hwtid", ep->hwtid))
 251                         goto err_cancel_table;
 252                 if (rdma_nl_put_driver_u32(msg, "ord", ep->ord))
 253                         goto err_cancel_table;
 254                 if (rdma_nl_put_driver_u32(msg, "ird", ep->ird))
 255                         goto err_cancel_table;
 256                 if (rdma_nl_put_driver_u32(msg, "emss", ep->emss))
 257                         goto err_cancel_table;
 258
 259                 if (!ep->parent_ep && rdma_nl_put_driver_u32(msg, "atid",
 260                                                              ep->atid))
 261                         goto err_cancel_table;
 262         }
 263         nla_nest_end(msg, table_attr);
 264         kfree(uep);
 265         return 0;
 266
 267 err_cancel_table:
 268         nla_nest_cancel(msg, table_attr);
 269 err_free_uep:
 270         kfree(uep);
 271         return -EMSGSIZE;
 272 }
 273
 274 c4iw_restrack_func *c4iw_restrack_funcs[RDMA_RESTRACK_MAX] = {
 275         [RDMA_RESTRACK_QP]      = fill_res_qp_entry,
 276         [RDMA_RESTRACK_CM_ID]   = fill_res_ep_entry,
 277 };