drivers/infiniband/hw/mthca/mthca_uar.c

   1 /*
   2  * Copyright (c) 2005 Topspin Communications.  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 <asm/page.h>           /* PAGE_SHIFT */
  34
  35 #include "mthca_dev.h"
  36 #include "mthca_memfree.h"
  37
  38 int mthca_uar_alloc(struct mthca_dev *dev, struct mthca_uar *uar)
  39 {
  40         uar->index = mthca_alloc(&dev->uar_table.alloc);
  41         if (uar->index == -1)
  42                 return -ENOMEM;
  43
  44         uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index;
  45
  46         return 0;
  47 }
  48
  49 void mthca_uar_free(struct mthca_dev *dev, struct mthca_uar *uar)
  50 {
  51         mthca_free(&dev->uar_table.alloc, uar->index);
  52 }
  53
  54 int mthca_init_uar_table(struct mthca_dev *dev)
  55 {
  56         int ret;
  57
  58         ret = mthca_alloc_init(&dev->uar_table.alloc,
  59                                dev->limits.num_uars,
  60                                dev->limits.num_uars - 1,
  61                                dev->limits.reserved_uars + 1);
  62         if (ret)
  63                 return ret;
  64
  65         ret = mthca_init_db_tab(dev);
  66         if (ret)
  67                 mthca_alloc_cleanup(&dev->uar_table.alloc);
  68
  69         return ret;
  70 }
  71
  72 void mthca_cleanup_uar_table(struct mthca_dev *dev)
  73 {
  74         mthca_cleanup_db_tab(dev);
  75
  76         /* XXX check if any UARs are still allocated? */
  77         mthca_alloc_cleanup(&dev->uar_table.alloc);
  78 }