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/export.h>
37 #include <linux/io-mapping.h>
45 MLX4_NUM_RESERVED_UARS = 8
48 int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
50 struct mlx4_priv *priv = mlx4_priv(dev);
52 *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
55 if (mlx4_is_mfunc(dev))
56 *pdn |= (dev->caps.function + 1) << NOT_MASKED_PD_BITS;
59 EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
61 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
63 mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
65 EXPORT_SYMBOL_GPL(mlx4_pd_free);
67 int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
69 struct mlx4_priv *priv = mlx4_priv(dev);
71 *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap);
77 EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc);
79 void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
81 mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn);
83 EXPORT_SYMBOL_GPL(mlx4_xrcd_free);
85 int mlx4_init_pd_table(struct mlx4_dev *dev)
87 struct mlx4_priv *priv = mlx4_priv(dev);
89 return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
90 (1 << NOT_MASKED_PD_BITS) - 1,
91 dev->caps.reserved_pds, 0);
94 void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
96 mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
99 int mlx4_init_xrcd_table(struct mlx4_dev *dev)
101 struct mlx4_priv *priv = mlx4_priv(dev);
103 return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16),
104 (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0);
107 void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev)
109 mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap);
112 int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
116 uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
117 if (uar->index == -1)
120 if (mlx4_is_slave(dev))
121 offset = uar->index % ((int) pci_resource_len(dev->pdev, 2) /
122 dev->caps.uar_page_size);
125 uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + offset;
129 EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
131 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
133 mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
135 EXPORT_SYMBOL_GPL(mlx4_uar_free);
137 int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf)
139 struct mlx4_priv *priv = mlx4_priv(dev);
140 struct mlx4_uar *uar;
144 if (!priv->bf_mapping)
147 mutex_lock(&priv->bf_mutex);
148 if (!list_empty(&priv->bf_list))
149 uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list);
151 if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) {
155 uar = kmalloc(sizeof *uar, GFP_KERNEL);
160 err = mlx4_uar_alloc(dev, uar);
164 uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE);
170 uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT);
175 uar->free_bf_bmap = 0;
176 list_add(&uar->bf_list, &priv->bf_list);
180 idx = ffz(uar->free_bf_bmap);
181 uar->free_bf_bmap |= 1 << idx;
184 bf->buf_size = dev->caps.bf_reg_size / 2;
185 bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size;
186 if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1)
187 list_del_init(&uar->bf_list);
196 mlx4_uar_free(dev, uar);
202 mutex_unlock(&priv->bf_mutex);
205 EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
207 void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf)
209 struct mlx4_priv *priv = mlx4_priv(dev);
212 if (!bf->uar || !bf->uar->bf_map)
215 mutex_lock(&priv->bf_mutex);
216 idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size;
217 bf->uar->free_bf_bmap &= ~(1 << idx);
218 if (!bf->uar->free_bf_bmap) {
219 if (!list_empty(&bf->uar->bf_list))
220 list_del(&bf->uar->bf_list);
222 io_mapping_unmap(bf->uar->bf_map);
223 iounmap(bf->uar->map);
224 mlx4_uar_free(dev, bf->uar);
226 } else if (list_empty(&bf->uar->bf_list))
227 list_add(&bf->uar->bf_list, &priv->bf_list);
229 mutex_unlock(&priv->bf_mutex);
231 EXPORT_SYMBOL_GPL(mlx4_bf_free);
233 int mlx4_init_uar_table(struct mlx4_dev *dev)
235 if (dev->caps.num_uars <= 128) {
236 mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
238 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
242 return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
243 dev->caps.num_uars, dev->caps.num_uars - 1,
244 dev->caps.reserved_uars, 0);
247 void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
249 mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);