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/errno.h>
35 #include <linux/io-mapping.h>
43 MLX4_NUM_RESERVED_UARS = 8
46 int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
48 struct mlx4_priv *priv = mlx4_priv(dev);
50 *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
56 EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
58 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
60 mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
62 EXPORT_SYMBOL_GPL(mlx4_pd_free);
64 int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
66 struct mlx4_priv *priv = mlx4_priv(dev);
68 *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap);
74 EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc);
76 void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
78 mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn);
80 EXPORT_SYMBOL_GPL(mlx4_xrcd_free);
82 int mlx4_init_pd_table(struct mlx4_dev *dev)
84 struct mlx4_priv *priv = mlx4_priv(dev);
86 return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
87 (1 << 24) - 1, dev->caps.reserved_pds, 0);
90 void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
92 mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
95 int mlx4_init_xrcd_table(struct mlx4_dev *dev)
97 struct mlx4_priv *priv = mlx4_priv(dev);
99 return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16),
100 (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0);
103 void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev)
105 mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap);
108 int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
110 uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
111 if (uar->index == -1)
114 uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + uar->index;
119 EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
121 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
123 mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
125 EXPORT_SYMBOL_GPL(mlx4_uar_free);
127 int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf)
129 struct mlx4_priv *priv = mlx4_priv(dev);
130 struct mlx4_uar *uar;
134 if (!priv->bf_mapping)
137 mutex_lock(&priv->bf_mutex);
138 if (!list_empty(&priv->bf_list))
139 uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list);
141 if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) {
145 uar = kmalloc(sizeof *uar, GFP_KERNEL);
150 err = mlx4_uar_alloc(dev, uar);
154 uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE);
160 uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT);
165 uar->free_bf_bmap = 0;
166 list_add(&uar->bf_list, &priv->bf_list);
170 idx = ffz(uar->free_bf_bmap);
171 uar->free_bf_bmap |= 1 << idx;
174 bf->buf_size = dev->caps.bf_reg_size / 2;
175 bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size;
176 if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1)
177 list_del_init(&uar->bf_list);
186 mlx4_uar_free(dev, uar);
192 mutex_unlock(&priv->bf_mutex);
195 EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
197 void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf)
199 struct mlx4_priv *priv = mlx4_priv(dev);
202 if (!bf->uar || !bf->uar->bf_map)
205 mutex_lock(&priv->bf_mutex);
206 idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size;
207 bf->uar->free_bf_bmap &= ~(1 << idx);
208 if (!bf->uar->free_bf_bmap) {
209 if (!list_empty(&bf->uar->bf_list))
210 list_del(&bf->uar->bf_list);
212 io_mapping_unmap(bf->uar->bf_map);
213 iounmap(bf->uar->map);
214 mlx4_uar_free(dev, bf->uar);
216 } else if (list_empty(&bf->uar->bf_list))
217 list_add(&bf->uar->bf_list, &priv->bf_list);
219 mutex_unlock(&priv->bf_mutex);
221 EXPORT_SYMBOL_GPL(mlx4_bf_free);
223 int mlx4_init_uar_table(struct mlx4_dev *dev)
225 if (dev->caps.num_uars <= 128) {
226 mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
228 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
232 return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
233 dev->caps.num_uars, dev->caps.num_uars - 1,
234 max(128, dev->caps.reserved_uars), 0);
237 void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
239 mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);