drivers/net/mlx4/pd.c

   1 /*
   2  * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright (c) 2005 Mellanox Technologies. 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/errno.h>
  35
  36 #include <asm/page.h>
  37
  38 #include "mlx4.h"
  39 #include "icm.h"
  40
  41 int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
  42 {
  43         struct mlx4_priv *priv = mlx4_priv(dev);
  44
  45         *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
  46         if (*pdn == -1)
  47                 return -ENOMEM;
  48
  49         return 0;
  50 }
  51 EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
  52
  53 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
  54 {
  55         mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
  56 }
  57 EXPORT_SYMBOL_GPL(mlx4_pd_free);
  58
  59 int mlx4_init_pd_table(struct mlx4_dev *dev)
  60 {
  61         struct mlx4_priv *priv = mlx4_priv(dev);
  62
  63         return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
  64                                 (1 << 24) - 1, dev->caps.reserved_pds, 0);
  65 }
  66
  67 void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
  68 {
  69         mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
  70 }
  71
  72
  73 int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
  74 {
  75         uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
  76         if (uar->index == -1)
  77                 return -ENOMEM;
  78
  79         uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index;
  80
  81         return 0;
  82 }
  83 EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
  84
  85 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
  86 {
  87         mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
  88 }
  89 EXPORT_SYMBOL_GPL(mlx4_uar_free);
  90
  91 int mlx4_init_uar_table(struct mlx4_dev *dev)
  92 {
  93         if (dev->caps.num_uars <= 128) {
  94                 mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
  95                          dev->caps.num_uars);
  96                 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
  97                 return -ENODEV;
  98         }
  99
 100         return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
 101                                 dev->caps.num_uars, dev->caps.num_uars - 1,
 102                                 max(128, dev->caps.reserved_uars), 0);
 103 }
 104
 105 void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
 106 {
 107         mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);
 108 }