2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
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:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
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.
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
34 #include <linux/init.h>
35 #include <linux/errno.h>
36 #include <linux/io-mapping.h>
44 MLX4_NUM_RESERVED_UARS = 8
47 int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
49 struct mlx4_priv *priv = mlx4_priv(dev);
51 *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
57 EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
59 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
61 mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
63 EXPORT_SYMBOL_GPL(mlx4_pd_free);
65 int mlx4_init_pd_table(struct mlx4_dev *dev)
67 struct mlx4_priv *priv = mlx4_priv(dev);
69 return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
70 (1 << 24) - 1, dev->caps.reserved_pds, 0);
73 void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
75 mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
79 int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
81 uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
85 uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index;
90 EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
92 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
94 mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
96 EXPORT_SYMBOL_GPL(mlx4_uar_free);
98 int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf)
100 struct mlx4_priv *priv = mlx4_priv(dev);
101 struct mlx4_uar *uar;
105 if (!priv->bf_mapping)
108 mutex_lock(&priv->bf_mutex);
109 if (!list_empty(&priv->bf_list))
110 uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list);
112 if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) {
116 uar = kmalloc(sizeof *uar, GFP_KERNEL);
121 err = mlx4_uar_alloc(dev, uar);
125 uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE);
131 uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT);
136 uar->free_bf_bmap = 0;
137 list_add(&uar->bf_list, &priv->bf_list);
141 idx = ffz(uar->free_bf_bmap);
142 uar->free_bf_bmap |= 1 << idx;
145 bf->buf_size = dev->caps.bf_reg_size / 2;
146 bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size;
147 if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1)
148 list_del_init(&uar->bf_list);
157 mlx4_uar_free(dev, uar);
163 mutex_unlock(&priv->bf_mutex);
166 EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
168 void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf)
170 struct mlx4_priv *priv = mlx4_priv(dev);
173 if (!bf->uar || !bf->uar->bf_map)
176 mutex_lock(&priv->bf_mutex);
177 idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size;
178 bf->uar->free_bf_bmap &= ~(1 << idx);
179 if (!bf->uar->free_bf_bmap) {
180 if (!list_empty(&bf->uar->bf_list))
181 list_del(&bf->uar->bf_list);
183 io_mapping_unmap(bf->uar->bf_map);
184 iounmap(bf->uar->map);
185 mlx4_uar_free(dev, bf->uar);
187 } else if (list_empty(&bf->uar->bf_list))
188 list_add(&bf->uar->bf_list, &priv->bf_list);
190 mutex_unlock(&priv->bf_mutex);
192 EXPORT_SYMBOL_GPL(mlx4_bf_free);
194 int mlx4_init_uar_table(struct mlx4_dev *dev)
196 if (dev->caps.num_uars <= 128) {
197 mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
199 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
203 return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
204 dev->caps.num_uars, dev->caps.num_uars - 1,
205 max(128, dev->caps.reserved_uars), 0);
208 void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
210 mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);