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/errno.h>
35 #include <linux/export.h>
36 #include <linux/io-mapping.h>
37
38 #include <asm/page.h>
39
40 #include "mlx4.h"
41 #include "icm.h"
42
43 enum {
44 MLX4_NUM_RESERVED_UARS = 8
45 };
46
mlx4_pd_alloc(struct mlx4_dev * dev,u32 * pdn)47 int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn)
48 {
49 struct mlx4_priv *priv = mlx4_priv(dev);
50
51 *pdn = mlx4_bitmap_alloc(&priv->pd_bitmap);
52 if (*pdn == -1)
53 return -ENOMEM;
54
55 return 0;
56 }
57 EXPORT_SYMBOL_GPL(mlx4_pd_alloc);
58
mlx4_pd_free(struct mlx4_dev * dev,u32 pdn)59 void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn)
60 {
61 mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn, MLX4_USE_RR);
62 }
63 EXPORT_SYMBOL_GPL(mlx4_pd_free);
64
__mlx4_xrcd_alloc(struct mlx4_dev * dev,u32 * xrcdn)65 int __mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
66 {
67 struct mlx4_priv *priv = mlx4_priv(dev);
68
69 *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap);
70 if (*xrcdn == -1)
71 return -ENOMEM;
72
73 return 0;
74 }
75
mlx4_xrcd_alloc(struct mlx4_dev * dev,u32 * xrcdn)76 int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn)
77 {
78 u64 out_param;
79 int err;
80
81 if (mlx4_is_mfunc(dev)) {
82 err = mlx4_cmd_imm(dev, 0, &out_param,
83 RES_XRCD, RES_OP_RESERVE,
84 MLX4_CMD_ALLOC_RES,
85 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
86 if (err)
87 return err;
88
89 *xrcdn = get_param_l(&out_param);
90 return 0;
91 }
92 return __mlx4_xrcd_alloc(dev, xrcdn);
93 }
94 EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc);
95
__mlx4_xrcd_free(struct mlx4_dev * dev,u32 xrcdn)96 void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
97 {
98 mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn, MLX4_USE_RR);
99 }
100
mlx4_xrcd_free(struct mlx4_dev * dev,u32 xrcdn)101 void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
102 {
103 u64 in_param = 0;
104 int err;
105
106 if (mlx4_is_mfunc(dev)) {
107 set_param_l(&in_param, xrcdn);
108 err = mlx4_cmd(dev, in_param, RES_XRCD,
109 RES_OP_RESERVE, MLX4_CMD_FREE_RES,
110 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
111 if (err)
112 mlx4_warn(dev, "Failed to release xrcdn %d\n", xrcdn);
113 } else
114 __mlx4_xrcd_free(dev, xrcdn);
115 }
116 EXPORT_SYMBOL_GPL(mlx4_xrcd_free);
117
mlx4_init_pd_table(struct mlx4_dev * dev)118 int mlx4_init_pd_table(struct mlx4_dev *dev)
119 {
120 struct mlx4_priv *priv = mlx4_priv(dev);
121
122 return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds,
123 (1 << NOT_MASKED_PD_BITS) - 1,
124 dev->caps.reserved_pds, 0);
125 }
126
mlx4_cleanup_pd_table(struct mlx4_dev * dev)127 void mlx4_cleanup_pd_table(struct mlx4_dev *dev)
128 {
129 mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap);
130 }
131
mlx4_init_xrcd_table(struct mlx4_dev * dev)132 int mlx4_init_xrcd_table(struct mlx4_dev *dev)
133 {
134 struct mlx4_priv *priv = mlx4_priv(dev);
135
136 return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16),
137 (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0);
138 }
139
mlx4_cleanup_xrcd_table(struct mlx4_dev * dev)140 void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev)
141 {
142 mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap);
143 }
144
mlx4_uar_alloc(struct mlx4_dev * dev,struct mlx4_uar * uar)145 int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar)
146 {
147 int offset;
148
149 uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap);
150 if (uar->index == -1)
151 return -ENOMEM;
152
153 if (mlx4_is_slave(dev))
154 offset = uar->index % ((int)pci_resource_len(dev->persist->pdev,
155 2) /
156 dev->caps.uar_page_size);
157 else
158 offset = uar->index;
159 uar->pfn = (pci_resource_start(dev->persist->pdev, 2) >> PAGE_SHIFT)
160 + offset;
161 uar->map = NULL;
162 return 0;
163 }
164 EXPORT_SYMBOL_GPL(mlx4_uar_alloc);
165
mlx4_uar_free(struct mlx4_dev * dev,struct mlx4_uar * uar)166 void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar)
167 {
168 mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index, MLX4_USE_RR);
169 }
170 EXPORT_SYMBOL_GPL(mlx4_uar_free);
171
mlx4_bf_alloc(struct mlx4_dev * dev,struct mlx4_bf * bf,int node)172 int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf, int node)
173 {
174 struct mlx4_priv *priv = mlx4_priv(dev);
175 struct mlx4_uar *uar;
176 int err = 0;
177 int idx;
178
179 if (!priv->bf_mapping)
180 return -ENOMEM;
181
182 mutex_lock(&priv->bf_mutex);
183 if (!list_empty(&priv->bf_list))
184 uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list);
185 else {
186 if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) {
187 err = -ENOMEM;
188 goto out;
189 }
190 uar = kmalloc_node(sizeof(*uar), GFP_KERNEL, node);
191 if (!uar) {
192 uar = kmalloc(sizeof(*uar), GFP_KERNEL);
193 if (!uar) {
194 err = -ENOMEM;
195 goto out;
196 }
197 }
198 err = mlx4_uar_alloc(dev, uar);
199 if (err)
200 goto free_kmalloc;
201
202 uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE);
203 if (!uar->map) {
204 err = -ENOMEM;
205 goto free_uar;
206 }
207
208 uar->bf_map = io_mapping_map_wc(priv->bf_mapping,
209 uar->index << PAGE_SHIFT,
210 PAGE_SIZE);
211 if (!uar->bf_map) {
212 err = -ENOMEM;
213 goto unamp_uar;
214 }
215 uar->free_bf_bmap = 0;
216 list_add(&uar->bf_list, &priv->bf_list);
217 }
218
219 idx = ffz(uar->free_bf_bmap);
220 uar->free_bf_bmap |= 1 << idx;
221 bf->uar = uar;
222 bf->offset = 0;
223 bf->buf_size = dev->caps.bf_reg_size / 2;
224 bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size;
225 if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1)
226 list_del_init(&uar->bf_list);
227
228 goto out;
229
230 unamp_uar:
231 bf->uar = NULL;
232 iounmap(uar->map);
233
234 free_uar:
235 mlx4_uar_free(dev, uar);
236
237 free_kmalloc:
238 kfree(uar);
239
240 out:
241 mutex_unlock(&priv->bf_mutex);
242 return err;
243 }
244 EXPORT_SYMBOL_GPL(mlx4_bf_alloc);
245
mlx4_bf_free(struct mlx4_dev * dev,struct mlx4_bf * bf)246 void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf)
247 {
248 struct mlx4_priv *priv = mlx4_priv(dev);
249 int idx;
250
251 if (!bf->uar || !bf->uar->bf_map)
252 return;
253
254 mutex_lock(&priv->bf_mutex);
255 idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size;
256 bf->uar->free_bf_bmap &= ~(1 << idx);
257 if (!bf->uar->free_bf_bmap) {
258 if (!list_empty(&bf->uar->bf_list))
259 list_del(&bf->uar->bf_list);
260
261 io_mapping_unmap(bf->uar->bf_map);
262 iounmap(bf->uar->map);
263 mlx4_uar_free(dev, bf->uar);
264 kfree(bf->uar);
265 } else if (list_empty(&bf->uar->bf_list))
266 list_add(&bf->uar->bf_list, &priv->bf_list);
267
268 mutex_unlock(&priv->bf_mutex);
269 }
270 EXPORT_SYMBOL_GPL(mlx4_bf_free);
271
mlx4_init_uar_table(struct mlx4_dev * dev)272 int mlx4_init_uar_table(struct mlx4_dev *dev)
273 {
274 int num_reserved_uar = mlx4_get_num_reserved_uar(dev);
275
276 mlx4_dbg(dev, "uar_page_shift = %d", dev->uar_page_shift);
277 mlx4_dbg(dev, "Effective reserved_uars=%d", dev->caps.reserved_uars);
278
279 if (dev->caps.num_uars <= num_reserved_uar) {
280 mlx4_err(
281 dev, "Only %d UAR pages (need more than %d)\n",
282 dev->caps.num_uars, num_reserved_uar);
283 mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n");
284 return -ENODEV;
285 }
286
287 return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap,
288 dev->caps.num_uars, dev->caps.num_uars - 1,
289 dev->caps.reserved_uars, 0);
290 }
291
mlx4_cleanup_uar_table(struct mlx4_dev * dev)292 void mlx4_cleanup_uar_table(struct mlx4_dev *dev)
293 {
294 mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap);
295 }
296