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225c7b1f RD |
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 | ||
f5311ac1 | 34 | #include <linux/init.h> |
225c7b1f | 35 | #include <linux/errno.h> |
ee40fa06 | 36 | #include <linux/export.h> |
c1b43dca | 37 | #include <linux/io-mapping.h> |
225c7b1f RD |
38 | |
39 | #include <asm/page.h> | |
40 | ||
41 | #include "mlx4.h" | |
42 | #include "icm.h" | |
43 | ||
9ace5e01 EC |
44 | enum { |
45 | MLX4_NUM_RESERVED_UARS = 8 | |
46 | }; | |
47 | ||
225c7b1f RD |
48 | int 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; | |
eb41049f | 55 | |
225c7b1f RD |
56 | return 0; |
57 | } | |
58 | EXPORT_SYMBOL_GPL(mlx4_pd_alloc); | |
59 | ||
60 | void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn) | |
61 | { | |
62 | mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn); | |
63 | } | |
64 | EXPORT_SYMBOL_GPL(mlx4_pd_free); | |
65 | ||
ba062d52 | 66 | int __mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn) |
012a8ff5 SH |
67 | { |
68 | struct mlx4_priv *priv = mlx4_priv(dev); | |
69 | ||
70 | *xrcdn = mlx4_bitmap_alloc(&priv->xrcd_bitmap); | |
71 | if (*xrcdn == -1) | |
72 | return -ENOMEM; | |
73 | ||
74 | return 0; | |
75 | } | |
ba062d52 JM |
76 | |
77 | int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn) | |
78 | { | |
79 | u64 out_param; | |
80 | int err; | |
81 | ||
82 | if (mlx4_is_mfunc(dev)) { | |
83 | err = mlx4_cmd_imm(dev, 0, &out_param, | |
84 | RES_XRCD, RES_OP_RESERVE, | |
85 | MLX4_CMD_ALLOC_RES, | |
86 | MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); | |
87 | if (err) | |
88 | return err; | |
89 | ||
90 | *xrcdn = get_param_l(&out_param); | |
91 | return 0; | |
92 | } | |
93 | return __mlx4_xrcd_alloc(dev, xrcdn); | |
94 | } | |
012a8ff5 SH |
95 | EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc); |
96 | ||
ba062d52 | 97 | void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) |
012a8ff5 SH |
98 | { |
99 | mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn); | |
100 | } | |
ba062d52 JM |
101 | |
102 | void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) | |
103 | { | |
e7dbeba8 | 104 | u64 in_param = 0; |
ba062d52 JM |
105 | int err; |
106 | ||
107 | if (mlx4_is_mfunc(dev)) { | |
108 | set_param_l(&in_param, xrcdn); | |
109 | err = mlx4_cmd(dev, in_param, RES_XRCD, | |
110 | RES_OP_RESERVE, MLX4_CMD_FREE_RES, | |
111 | MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); | |
112 | if (err) | |
113 | mlx4_warn(dev, "Failed to release xrcdn %d\n", xrcdn); | |
114 | } else | |
115 | __mlx4_xrcd_free(dev, xrcdn); | |
116 | } | |
012a8ff5 SH |
117 | EXPORT_SYMBOL_GPL(mlx4_xrcd_free); |
118 | ||
3d73c288 | 119 | int mlx4_init_pd_table(struct mlx4_dev *dev) |
225c7b1f RD |
120 | { |
121 | struct mlx4_priv *priv = mlx4_priv(dev); | |
122 | ||
123 | return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds, | |
f5311ac1 JM |
124 | (1 << NOT_MASKED_PD_BITS) - 1, |
125 | dev->caps.reserved_pds, 0); | |
225c7b1f RD |
126 | } |
127 | ||
128 | void mlx4_cleanup_pd_table(struct mlx4_dev *dev) | |
129 | { | |
130 | mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap); | |
131 | } | |
132 | ||
012a8ff5 SH |
133 | int mlx4_init_xrcd_table(struct mlx4_dev *dev) |
134 | { | |
135 | struct mlx4_priv *priv = mlx4_priv(dev); | |
136 | ||
137 | return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16), | |
138 | (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0); | |
139 | } | |
140 | ||
141 | void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev) | |
142 | { | |
143 | mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap); | |
144 | } | |
225c7b1f RD |
145 | |
146 | int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar) | |
147 | { | |
f5311ac1 JM |
148 | int offset; |
149 | ||
225c7b1f RD |
150 | uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap); |
151 | if (uar->index == -1) | |
152 | return -ENOMEM; | |
153 | ||
f5311ac1 JM |
154 | if (mlx4_is_slave(dev)) |
155 | offset = uar->index % ((int) pci_resource_len(dev->pdev, 2) / | |
156 | dev->caps.uar_page_size); | |
157 | else | |
158 | offset = uar->index; | |
159 | uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + offset; | |
c1b43dca | 160 | uar->map = NULL; |
225c7b1f RD |
161 | return 0; |
162 | } | |
163 | EXPORT_SYMBOL_GPL(mlx4_uar_alloc); | |
164 | ||
165 | void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar) | |
166 | { | |
167 | mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index); | |
168 | } | |
169 | EXPORT_SYMBOL_GPL(mlx4_uar_free); | |
170 | ||
c1b43dca EC |
171 | int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf) |
172 | { | |
173 | struct mlx4_priv *priv = mlx4_priv(dev); | |
174 | struct mlx4_uar *uar; | |
175 | int err = 0; | |
176 | int idx; | |
177 | ||
178 | if (!priv->bf_mapping) | |
179 | return -ENOMEM; | |
180 | ||
181 | mutex_lock(&priv->bf_mutex); | |
182 | if (!list_empty(&priv->bf_list)) | |
183 | uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list); | |
184 | else { | |
9ace5e01 EC |
185 | if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) { |
186 | err = -ENOMEM; | |
187 | goto out; | |
188 | } | |
c1b43dca EC |
189 | uar = kmalloc(sizeof *uar, GFP_KERNEL); |
190 | if (!uar) { | |
191 | err = -ENOMEM; | |
192 | goto out; | |
193 | } | |
194 | err = mlx4_uar_alloc(dev, uar); | |
195 | if (err) | |
196 | goto free_kmalloc; | |
197 | ||
198 | uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE); | |
199 | if (!uar->map) { | |
200 | err = -ENOMEM; | |
201 | goto free_uar; | |
202 | } | |
203 | ||
204 | uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT); | |
205 | if (!uar->bf_map) { | |
206 | err = -ENOMEM; | |
207 | goto unamp_uar; | |
208 | } | |
209 | uar->free_bf_bmap = 0; | |
210 | list_add(&uar->bf_list, &priv->bf_list); | |
211 | } | |
212 | ||
213 | bf->uar = uar; | |
214 | idx = ffz(uar->free_bf_bmap); | |
215 | uar->free_bf_bmap |= 1 << idx; | |
216 | bf->uar = uar; | |
217 | bf->offset = 0; | |
218 | bf->buf_size = dev->caps.bf_reg_size / 2; | |
219 | bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size; | |
220 | if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1) | |
221 | list_del_init(&uar->bf_list); | |
222 | ||
223 | goto out; | |
224 | ||
225 | unamp_uar: | |
226 | bf->uar = NULL; | |
227 | iounmap(uar->map); | |
228 | ||
229 | free_uar: | |
230 | mlx4_uar_free(dev, uar); | |
231 | ||
232 | free_kmalloc: | |
233 | kfree(uar); | |
234 | ||
235 | out: | |
236 | mutex_unlock(&priv->bf_mutex); | |
237 | return err; | |
238 | } | |
239 | EXPORT_SYMBOL_GPL(mlx4_bf_alloc); | |
240 | ||
241 | void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf) | |
242 | { | |
243 | struct mlx4_priv *priv = mlx4_priv(dev); | |
244 | int idx; | |
245 | ||
246 | if (!bf->uar || !bf->uar->bf_map) | |
247 | return; | |
248 | ||
249 | mutex_lock(&priv->bf_mutex); | |
250 | idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size; | |
251 | bf->uar->free_bf_bmap &= ~(1 << idx); | |
252 | if (!bf->uar->free_bf_bmap) { | |
253 | if (!list_empty(&bf->uar->bf_list)) | |
254 | list_del(&bf->uar->bf_list); | |
255 | ||
256 | io_mapping_unmap(bf->uar->bf_map); | |
257 | iounmap(bf->uar->map); | |
258 | mlx4_uar_free(dev, bf->uar); | |
259 | kfree(bf->uar); | |
260 | } else if (list_empty(&bf->uar->bf_list)) | |
261 | list_add(&bf->uar->bf_list, &priv->bf_list); | |
262 | ||
263 | mutex_unlock(&priv->bf_mutex); | |
264 | } | |
265 | EXPORT_SYMBOL_GPL(mlx4_bf_free); | |
266 | ||
225c7b1f RD |
267 | int mlx4_init_uar_table(struct mlx4_dev *dev) |
268 | { | |
76442640 RD |
269 | if (dev->caps.num_uars <= 128) { |
270 | mlx4_err(dev, "Only %d UAR pages (need more than 128)\n", | |
271 | dev->caps.num_uars); | |
272 | mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n"); | |
273 | return -ENODEV; | |
274 | } | |
275 | ||
225c7b1f RD |
276 | return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap, |
277 | dev->caps.num_uars, dev->caps.num_uars - 1, | |
f5311ac1 | 278 | dev->caps.reserved_uars, 0); |
225c7b1f RD |
279 | } |
280 | ||
281 | void mlx4_cleanup_uar_table(struct mlx4_dev *dev) | |
282 | { | |
283 | mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap); | |
284 | } |