drivers/infiniband/sw/rxe/rxe

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This source file includes following definitions.
rxe_srq_chk_attr
rxe_srq_from_init
rxe_srq_from_attr
   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 #include <linux/vmalloc.h>
  35 #include "rxe.h"
  36 #include "rxe_loc.h"
  37 #include "rxe_queue.h"
  38 
  39 int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
  40                      struct ib_srq_attr *attr, enum ib_srq_attr_mask mask)
  41 {
  42         if (srq && srq->error) {
  43                 pr_warn("srq in error state\n");
  44                 goto err1;
  45         }
  46 
  47         if (mask & IB_SRQ_MAX_WR) {
  48                 if (attr->max_wr > rxe->attr.max_srq_wr) {
  49                         pr_warn("max_wr(%d) > max_srq_wr(%d)\n",
  50                                 attr->max_wr, rxe->attr.max_srq_wr);
  51                         goto err1;
  52                 }
  53 
  54                 if (attr->max_wr <= 0) {
  55                         pr_warn("max_wr(%d) <= 0\n", attr->max_wr);
  56                         goto err1;
  57                 }
  58 
  59                 if (srq && srq->limit && (attr->max_wr < srq->limit)) {
  60                         pr_warn("max_wr (%d) < srq->limit (%d)\n",
  61                                 attr->max_wr, srq->limit);
  62                         goto err1;
  63                 }
  64 
  65                 if (attr->max_wr < RXE_MIN_SRQ_WR)
  66                         attr->max_wr = RXE_MIN_SRQ_WR;
  67         }
  68 
  69         if (mask & IB_SRQ_LIMIT) {
  70                 if (attr->srq_limit > rxe->attr.max_srq_wr) {
  71                         pr_warn("srq_limit(%d) > max_srq_wr(%d)\n",
  72                                 attr->srq_limit, rxe->attr.max_srq_wr);
  73                         goto err1;
  74                 }
  75 
  76                 if (srq && (attr->srq_limit > srq->rq.queue->buf->index_mask)) {
  77                         pr_warn("srq_limit (%d) > cur limit(%d)\n",
  78                                 attr->srq_limit,
  79                                  srq->rq.queue->buf->index_mask);
  80                         goto err1;
  81                 }
  82         }
  83 
  84         if (mask == IB_SRQ_INIT_MASK) {
  85                 if (attr->max_sge > rxe->attr.max_srq_sge) {
  86                         pr_warn("max_sge(%d) > max_srq_sge(%d)\n",
  87                                 attr->max_sge, rxe->attr.max_srq_sge);
  88                         goto err1;
  89                 }
  90 
  91                 if (attr->max_sge < RXE_MIN_SRQ_SGE)
  92                         attr->max_sge = RXE_MIN_SRQ_SGE;
  93         }
  94 
  95         return 0;
  96 
  97 err1:
  98         return -EINVAL;
  99 }
 100 
 101 int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq,
 102                       struct ib_srq_init_attr *init, struct ib_udata *udata,
 103                       struct rxe_create_srq_resp __user *uresp)
 104 {
 105         int err;
 106         int srq_wqe_size;
 107         struct rxe_queue *q;
 108 
 109         srq->ibsrq.event_handler        = init->event_handler;
 110         srq->ibsrq.srq_context          = init->srq_context;
 111         srq->limit              = init->attr.srq_limit;
 112         srq->srq_num            = srq->pelem.index;
 113         srq->rq.max_wr          = init->attr.max_wr;
 114         srq->rq.max_sge         = init->attr.max_sge;
 115 
 116         srq_wqe_size            = rcv_wqe_size(srq->rq.max_sge);
 117 
 118         spin_lock_init(&srq->rq.producer_lock);
 119         spin_lock_init(&srq->rq.consumer_lock);
 120 
 121         q = rxe_queue_init(rxe, &srq->rq.max_wr,
 122                            srq_wqe_size);
 123         if (!q) {
 124                 pr_warn("unable to allocate queue for srq\n");
 125                 return -ENOMEM;
 126         }
 127 
 128         srq->rq.queue = q;
 129 
 130         err = do_mmap_info(rxe, uresp ? &uresp->mi : NULL, udata, q->buf,
 131                            q->buf_size, &q->ip);
 132         if (err) {
 133                 vfree(q->buf);
 134                 kfree(q);
 135                 return err;
 136         }
 137 
 138         if (uresp) {
 139                 if (copy_to_user(&uresp->srq_num, &srq->srq_num,
 140                                  sizeof(uresp->srq_num))) {
 141                         rxe_queue_cleanup(q);
 142                         return -EFAULT;
 143                 }
 144         }
 145 
 146         return 0;
 147 }
 148 
 149 int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 150                       struct ib_srq_attr *attr, enum ib_srq_attr_mask mask,
 151                       struct rxe_modify_srq_cmd *ucmd, struct ib_udata *udata)
 152 {
 153         int err;
 154         struct rxe_queue *q = srq->rq.queue;
 155         struct mminfo __user *mi = NULL;
 156 
 157         if (mask & IB_SRQ_MAX_WR) {
 158                 /*
 159                  * This is completely screwed up, the response is supposed to
 160                  * be in the outbuf not like this.
 161                  */
 162                 mi = u64_to_user_ptr(ucmd->mmap_info_addr);
 163 
 164                 err = rxe_queue_resize(q, &attr->max_wr,
 165                                        rcv_wqe_size(srq->rq.max_sge), udata, mi,
 166                                        &srq->rq.producer_lock,
 167                                        &srq->rq.consumer_lock);
 168                 if (err)
 169                         goto err2;
 170         }
 171 
 172         if (mask & IB_SRQ_LIMIT)
 173                 srq->limit = attr->srq_limit;
 174 
 175         return 0;
 176 
 177 err2:
 178         rxe_queue_cleanup(q);
 179         srq->rq.queue = NULL;
 180         return err;
 181 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/infiniband/sw/rxe/rxe_srq.c

DEFINITIONS
