blob: 5c9a54df17aba89d233926d9f37710ac84c0e504 [file] [log] [blame]
Roland Dreier225c7b12007-05-08 18:00:38 -07001/*
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
Jack Morgensteinf5311ac2011-12-13 04:12:13 +000034#include <linux/init.h>
Roland Dreier225c7b12007-05-08 18:00:38 -070035#include <linux/errno.h>
Paul Gortmakeree40fa02011-05-27 16:14:23 -040036#include <linux/export.h>
Eli Cohenc1b43dc2011-03-22 22:38:41 +000037#include <linux/io-mapping.h>
Roland Dreier225c7b12007-05-08 18:00:38 -070038
39#include <asm/page.h>
40
41#include "mlx4.h"
42#include "icm.h"
43
Eli Cohen9ace5e02011-03-22 22:38:48 +000044enum {
45 MLX4_NUM_RESERVED_UARS = 8
46};
47
Roland Dreier225c7b12007-05-08 18:00:38 -070048int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
49{
50 struct mlx4_priv *priv = mlx4_priv(dev);
51
52 *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
53 if (*pdn == -1)
54 return -ENOMEM;
Jack Morgensteinf5311ac2011-12-13 04:12:13 +000055 if (mlx4_is_mfunc(dev))
56 *pdn |= (dev->caps.function + 1) << NOT_MASKED_PD_BITS;
Roland Dreier225c7b12007-05-08 18:00:38 -070057 return 0;
58}
59EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
60
61void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
62{
63 mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn);
64}
65EXPORT_SYMBOL_GPL(mlx4_pd_free);
66
Sean Hefty012a8ff2011-06-02 09:01:33 -070067int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
68{
69 struct mlx4_priv *priv = mlx4_priv(dev);
70
71 *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap);
72 if (*xrcdn == -1)
73 return -ENOMEM;
74
75 return 0;
76}
77EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc);
78
79void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
80{
81 mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn);
82}
83EXPORT_SYMBOL_GPL(mlx4_xrcd_free);
84
Roland Dreier3d73c282007-10-10 15:43:54 -070085int mlx4_init_pd_table(struct mlx4_dev *dev)
Roland Dreier225c7b12007-05-08 18:00:38 -070086{
87 struct mlx4_priv *priv = mlx4_priv(dev);
88
89 return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
Jack Morgensteinf5311ac2011-12-13 04:12:13 +000090 (1 << NOT_MASKED_PD_BITS) - 1,
91 dev->caps.reserved_pds, 0);
Roland Dreier225c7b12007-05-08 18:00:38 -070092}
93
94void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
95{
96 mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
97}
98
Sean Hefty012a8ff2011-06-02 09:01:33 -070099int mlx4_init_xrcd_table(struct mlx4_dev *dev)
100{
101 struct mlx4_priv *priv = mlx4_priv(dev);
102
103 return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16),
104 (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0);
105}
106
107void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev)
108{
109 mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap);
110}
Roland Dreier225c7b12007-05-08 18:00:38 -0700111
112int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
113{
Jack Morgensteinf5311ac2011-12-13 04:12:13 +0000114 int offset;
115
Roland Dreier225c7b12007-05-08 18:00:38 -0700116 uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
117 if (uar->index == -1)
118 return -ENOMEM;
119
Jack Morgensteinf5311ac2011-12-13 04:12:13 +0000120 if (mlx4_is_slave(dev))
121 offset = uar->index % ((int) pci_resource_len(dev->pdev, 2) /
122 dev->caps.uar_page_size);
123 else
124 offset = uar->index;
125 uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + offset;
Eli Cohenc1b43dc2011-03-22 22:38:41 +0000126 uar->map = NULL;
Roland Dreier225c7b12007-05-08 18:00:38 -0700127 return 0;
128}
129EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
130
131void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
132{
133 mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index);
134}
135EXPORT_SYMBOL_GPL(mlx4_uar_free);
136
Eli Cohenc1b43dc2011-03-22 22:38:41 +0000137int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf)
138{
139 struct mlx4_priv *priv = mlx4_priv(dev);
140 struct mlx4_uar *uar;
141 int err = 0;
142 int idx;
143
144 if (!priv->bf_mapping)
145 return -ENOMEM;
146
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);
150 else {
Eli Cohen9ace5e02011-03-22 22:38:48 +0000151 if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) {
152 err = -ENOMEM;
153 goto out;
154 }
Eli Cohenc1b43dc2011-03-22 22:38:41 +0000155 uar = kmalloc(sizeof *uar, GFP_KERNEL);
156 if (!uar) {
157 err = -ENOMEM;
158 goto out;
159 }
160 err = mlx4_uar_alloc(dev, uar);
161 if (err)
162 goto free_kmalloc;
163
164 uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE);
165 if (!uar->map) {
166 err = -ENOMEM;
167 goto free_uar;
168 }
169
170 uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT);
171 if (!uar->bf_map) {
172 err = -ENOMEM;
173 goto unamp_uar;
174 }
175 uar->free_bf_bmap = 0;
176 list_add(&uar->bf_list, &priv->bf_list);
177 }
178
179 bf->uar = uar;
180 idx = ffz(uar->free_bf_bmap);
181 uar->free_bf_bmap |= 1 << idx;
182 bf->uar = uar;
183 bf->offset = 0;
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);
188
189 goto out;
190
191unamp_uar:
192 bf->uar = NULL;
193 iounmap(uar->map);
194
195free_uar:
196 mlx4_uar_free(dev, uar);
197
198free_kmalloc:
199 kfree(uar);
200
201out:
202 mutex_unlock(&priv->bf_mutex);
203 return err;
204}
205EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
206
207void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf)
208{
209 struct mlx4_priv *priv = mlx4_priv(dev);
210 int idx;
211
212 if (!bf->uar || !bf->uar->bf_map)
213 return;
214
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);
221
222 io_mapping_unmap(bf->uar->bf_map);
223 iounmap(bf->uar->map);
224 mlx4_uar_free(dev, bf->uar);
225 kfree(bf->uar);
226 } else if (list_empty(&bf->uar->bf_list))
227 list_add(&bf->uar->bf_list, &priv->bf_list);
228
229 mutex_unlock(&priv->bf_mutex);
230}
231EXPORT_SYMBOL_GPL(mlx4_bf_free);
232
Roland Dreier225c7b12007-05-08 18:00:38 -0700233int mlx4_init_uar_table(struct mlx4_dev *dev)
234{
Roland Dreier76442642008-07-23 08:12:47 -0700235 if (dev->caps.num_uars <= 128) {
236 mlx4_err(dev, "Only %d UAR pages (need more than 128)\n",
237 dev->caps.num_uars);
238 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
239 return -ENODEV;
240 }
241
Roland Dreier225c7b12007-05-08 18:00:38 -0700242 return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
243 dev->caps.num_uars, dev->caps.num_uars - 1,
Jack Morgensteinf5311ac2011-12-13 04:12:13 +0000244 dev->caps.reserved_uars, 0);
Roland Dreier225c7b12007-05-08 18:00:38 -0700245}
246
247void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
248{
249 mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);
250}