drivers/infiniband/hw/mthca/mthca_pd.c

   1 /*
   2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Cisco Systems.  All rights reserved.
   4  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  */
  34
  35 #include <linux/errno.h>
  36
  37 #include "mthca_dev.h"
  38
  39 int mthca_pd_alloc(struct mthca_dev *dev, int privileged, struct mthca_pd *pd)
  40 {
  41         int err = 0;
  42
  43         pd->privileged = privileged;
  44
  45         atomic_set(&pd->sqp_count, 0);
  46         pd->pd_num = mthca_alloc(&dev->pd_table.alloc);
  47         if (pd->pd_num == -1)
  48                 return -ENOMEM;
  49
  50         if (privileged) {
  51                 err = mthca_mr_alloc_notrans(dev, pd->pd_num,
  52                                              MTHCA_MPT_FLAG_LOCAL_READ |
  53                                              MTHCA_MPT_FLAG_LOCAL_WRITE,
  54                                              &pd->ntmr);
  55                 if (err)
  56                         mthca_free(&dev->pd_table.alloc, pd->pd_num);
  57         }
  58
  59         return err;
  60 }
  61
  62 void mthca_pd_free(struct mthca_dev *dev, struct mthca_pd *pd)
  63 {
  64         if (pd->privileged)
  65                 mthca_free_mr(dev, &pd->ntmr);
  66         mthca_free(&dev->pd_table.alloc, pd->pd_num);
  67 }
  68
  69 int mthca_init_pd_table(struct mthca_dev *dev)
  70 {
  71         return mthca_alloc_init(&dev->pd_table.alloc,
  72                                 dev->limits.num_pds,
  73                                 (1 << 24) - 1,
  74                                 dev->limits.reserved_pds);
  75 }
  76
  77 void mthca_cleanup_pd_table(struct mthca_dev *dev)
  78 {
  79         /* XXX check if any PDs are still allocated? */
  80         mthca_alloc_cleanup(&dev->pd_table.alloc);
  81 }