drivers/infiniband/sw/rxe/rxe_srq.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
   4  * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
   5  */
   6
   7 #include <linux/vmalloc.h>
   8 #include "rxe.h"
   9 #include "rxe_queue.h"
  10
  11 int rxe_srq_chk_init(struct rxe_dev *rxe, struct ib_srq_init_attr *init)
  12 {
  13         struct ib_srq_attr *attr = &init->attr;
  14
  15         if (attr->max_wr > rxe->attr.max_srq_wr) {
  16                 rxe_dbg_dev(rxe, "max_wr(%d) > max_srq_wr(%d)\n",
  17                         attr->max_wr, rxe->attr.max_srq_wr);
  18                 goto err1;
  19         }
  20
  21         if (attr->max_wr <= 0) {
  22                 rxe_dbg_dev(rxe, "max_wr(%d) <= 0\n", attr->max_wr);
  23                 goto err1;
  24         }
  25
  26         if (attr->max_wr < RXE_MIN_SRQ_WR)
  27                 attr->max_wr = RXE_MIN_SRQ_WR;
  28
  29         if (attr->max_sge > rxe->attr.max_srq_sge) {
  30                 rxe_dbg_dev(rxe, "max_sge(%d) > max_srq_sge(%d)\n",
  31                         attr->max_sge, rxe->attr.max_srq_sge);
  32                 goto err1;
  33         }
  34
  35         if (attr->max_sge < RXE_MIN_SRQ_SGE)
  36                 attr->max_sge = RXE_MIN_SRQ_SGE;
  37
  38         return 0;
  39
  40 err1:
  41         return -EINVAL;
  42 }
  43
  44 int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq,
  45                       struct ib_srq_init_attr *init, struct ib_udata *udata,
  46                       struct rxe_create_srq_resp __user *uresp)
  47 {
  48         int err;
  49         int srq_wqe_size;
  50         struct rxe_queue *q;
  51         enum queue_type type;
  52
  53         srq->ibsrq.event_handler        = init->event_handler;
  54         srq->ibsrq.srq_context          = init->srq_context;
  55         srq->limit              = init->attr.srq_limit;
  56         srq->srq_num            = srq->elem.index;
  57         srq->rq.max_wr          = init->attr.max_wr;
  58         srq->rq.max_sge         = init->attr.max_sge;
  59
  60         srq_wqe_size            = rcv_wqe_size(srq->rq.max_sge);
  61
  62         spin_lock_init(&srq->rq.producer_lock);
  63         spin_lock_init(&srq->rq.consumer_lock);
  64
  65         type = QUEUE_TYPE_FROM_CLIENT;
  66         q = rxe_queue_init(rxe, &srq->rq.max_wr, srq_wqe_size, type);
  67         if (!q) {
  68                 rxe_dbg_srq(srq, "Unable to allocate queue\n");
  69                 return -ENOMEM;
  70         }
  71
  72         srq->rq.queue = q;
  73
  74         err = do_mmap_info(rxe, uresp ? &uresp->mi : NULL, udata, q->buf,
  75                            q->buf_size, &q->ip);
  76         if (err) {
  77                 vfree(q->buf);
  78                 kfree(q);
  79                 return err;
  80         }
  81
  82         if (uresp) {
  83                 if (copy_to_user(&uresp->srq_num, &srq->srq_num,
  84                                  sizeof(uresp->srq_num))) {
  85                         rxe_queue_cleanup(q);
  86                         return -EFAULT;
  87                 }
  88         }
  89
  90         return 0;
  91 }
  92
  93 int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
  94                      struct ib_srq_attr *attr, enum ib_srq_attr_mask mask)
  95 {
  96         if (srq->error) {
  97                 rxe_dbg_srq(srq, "in error state\n");
  98                 goto err1;
  99         }
 100
 101         if (mask & IB_SRQ_MAX_WR) {
 102                 if (attr->max_wr > rxe->attr.max_srq_wr) {
 103                         rxe_dbg_srq(srq, "max_wr(%d) > max_srq_wr(%d)\n",
 104                                 attr->max_wr, rxe->attr.max_srq_wr);
 105                         goto err1;
 106                 }
 107
 108                 if (attr->max_wr <= 0) {
 109                         rxe_dbg_srq(srq, "max_wr(%d) <= 0\n", attr->max_wr);
 110                         goto err1;
 111                 }
 112
 113                 if (srq->limit && (attr->max_wr < srq->limit)) {
 114                         rxe_dbg_srq(srq, "max_wr (%d) < srq->limit (%d)\n",
 115                                 attr->max_wr, srq->limit);
 116                         goto err1;
 117                 }
 118
 119                 if (attr->max_wr < RXE_MIN_SRQ_WR)
 120                         attr->max_wr = RXE_MIN_SRQ_WR;
 121         }
 122
 123         if (mask & IB_SRQ_LIMIT) {
 124                 if (attr->srq_limit > rxe->attr.max_srq_wr) {
 125                         rxe_dbg_srq(srq, "srq_limit(%d) > max_srq_wr(%d)\n",
 126                                 attr->srq_limit, rxe->attr.max_srq_wr);
 127                         goto err1;
 128                 }
 129
 130                 if (attr->srq_limit > srq->rq.queue->buf->index_mask) {
 131                         rxe_dbg_srq(srq, "srq_limit (%d) > cur limit(%d)\n",
 132                                 attr->srq_limit,
 133                                 srq->rq.queue->buf->index_mask);
 134                         goto err1;
 135                 }
 136         }
 137
 138         return 0;
 139
 140 err1:
 141         return -EINVAL;
 142 }
 143
 144 int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq,
 145                       struct ib_srq_attr *attr, enum ib_srq_attr_mask mask,
 146                       struct rxe_modify_srq_cmd *ucmd, struct ib_udata *udata)
 147 {
 148         int err;
 149         struct rxe_queue *q = srq->rq.queue;
 150         struct mminfo __user *mi = NULL;
 151
 152         if (mask & IB_SRQ_MAX_WR) {
 153                 /*
 154                  * This is completely screwed up, the response is supposed to
 155                  * be in the outbuf not like this.
 156                  */
 157                 mi = u64_to_user_ptr(ucmd->mmap_info_addr);
 158
 159                 err = rxe_queue_resize(q, &attr->max_wr,
 160                                        rcv_wqe_size(srq->rq.max_sge), udata, mi,
 161                                        &srq->rq.producer_lock,
 162                                        &srq->rq.consumer_lock);
 163                 if (err)
 164                         goto err2;
 165         }
 166
 167         if (mask & IB_SRQ_LIMIT)
 168                 srq->limit = attr->srq_limit;
 169
 170         return 0;
 171
 172 err2:
 173         rxe_queue_cleanup(q);
 174         srq->rq.queue = NULL;
 175         return err;
 176 }
 177
 178 void rxe_srq_cleanup(struct rxe_pool_elem *elem)
 179 {
 180         struct rxe_srq *srq = container_of(elem, typeof(*srq), elem);
 181
 182         if (srq->pd)
 183                 rxe_put(srq->pd);
 184
 185         if (srq->rq.queue)
 186                 rxe_queue_cleanup(srq->rq.queue);
 187 }