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/init.h>
  35 #include <linux/errno.h>
  36
  37 #include <asm/page.h>
  38
  39 #include "mlx4.h"
  40 #include "icm.h"
  41
  42 int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
  43 {
  44         struct mlx4_priv *priv = mlx4_priv(dev);
  45
  46         *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
  47         if (*pdn == -1)
  48                 return -ENOMEM;
  49
  50         return 0;
  51 }
  52 EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
  53
  54 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
  55 {
  56         mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
  57 }
  58 EXPORT_SYMBOL_GPL(mlx4_pd_free);
  59
  60 int mlx4_init_pd_table(struct mlx4_dev *dev)
  61 {
  62         struct mlx4_priv *priv = mlx4_priv(dev);
  63
  64         return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
  65                                 (1 << 24) - 1, dev->caps.reserved_pds, 0);
  66 }
  67
  68 void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
  69 {
  70         mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
  71 }
  72
  73
  74 int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
  75 {
  76         uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
  77         if (uar->index == -1)
  78                 return -ENOMEM;
  79
  80         uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index;
  81
  82         return 0;
  83 }
  84 EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
  85
  86 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
  87 {
  88         mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
  89 }
  90 EXPORT_SYMBOL_GPL(mlx4_uar_free);
  91
  92 int mlx4_init_uar_table(struct mlx4_dev *dev)
  93 {
  94         if (dev->caps.num_uars <= 128) {
  95                 mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
  96                          dev->caps.num_uars);
  97                 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
  98                 return -ENODEV;
  99         }
 100
 101         return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
 102                                 dev->caps.num_uars, dev->caps.num_uars - 1,
 103                                 max(128, dev->caps.reserved_uars), 0);
 104 }
 105
 106 void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
 107 {
 108         mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);
 109 }