LXR linux/drivers/infiniband/hw/mthca/mthca

   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
  38int 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
  49void mthca_uar_free(struct mthca_dev *dev, struct mthca_uar *uar)
  50{
  51        mthca_free(&dev->uar_table.alloc, uar->index);
  52}
  53
  54int 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
  72void 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}
  79