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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; | |
f5311ac1 JM |
55 | if (mlx4_is_mfunc(dev)) |
56 | *pdn |= (dev->caps.function + 1) << NOT_MASKED_PD_BITS; | |
225c7b1f RD |
57 | return 0; |
58 | } | |
59 | EXPORT_SYMBOL_GPL(mlx4_pd_alloc); | |
60 | ||
61 | void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn) | |
62 | { | |
63 | mlx4_bitmap_free(&mlx4_priv(dev)->pd_bitmap, pdn); | |
64 | } | |
65 | EXPORT_SYMBOL_GPL(mlx4_pd_free); | |
66 | ||
012a8ff5 SH |
67 | int 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 | } | |
77 | EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc); | |
78 | ||
79 | void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) | |
80 | { | |
81 | mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn); | |
82 | } | |
83 | EXPORT_SYMBOL_GPL(mlx4_xrcd_free); | |
84 | ||
3d73c288 | 85 | int mlx4_init_pd_table(struct mlx4_dev *dev) |
225c7b1f RD |
86 | { |
87 | struct mlx4_priv *priv = mlx4_priv(dev); | |
88 | ||
89 | return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds, | |
f5311ac1 JM |
90 | (1 << NOT_MASKED_PD_BITS) - 1, |
91 | dev->caps.reserved_pds, 0); | |
225c7b1f RD |
92 | } |
93 | ||
94 | void mlx4_cleanup_pd_table(struct mlx4_dev *dev) | |
95 | { | |
96 | mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap); | |
97 | } | |
98 | ||
012a8ff5 SH |
99 | int 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 | ||
107 | void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev) | |
108 | { | |
109 | mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap); | |
110 | } | |
225c7b1f RD |
111 | |
112 | int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar) | |
113 | { | |
f5311ac1 JM |
114 | int offset; |
115 | ||
225c7b1f RD |
116 | uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap); |
117 | if (uar->index == -1) | |
118 | return -ENOMEM; | |
119 | ||
f5311ac1 JM |
120 | 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; | |
c1b43dca | 126 | uar->map = NULL; |
225c7b1f RD |
127 | return 0; |
128 | } | |
129 | EXPORT_SYMBOL_GPL(mlx4_uar_alloc); | |
130 | ||
131 | void 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 | } | |
135 | EXPORT_SYMBOL_GPL(mlx4_uar_free); | |
136 | ||
c1b43dca EC |
137 | int 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 { | |
9ace5e01 EC |
151 | if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) { |
152 | err = -ENOMEM; | |
153 | goto out; | |
154 | } | |
c1b43dca EC |
155 | 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 | ||
191 | unamp_uar: | |
192 | bf->uar = NULL; | |
193 | iounmap(uar->map); | |
194 | ||
195 | free_uar: | |
196 | mlx4_uar_free(dev, uar); | |
197 | ||
198 | free_kmalloc: | |
199 | kfree(uar); | |
200 | ||
201 | out: | |
202 | mutex_unlock(&priv->bf_mutex); | |
203 | return err; | |
204 | } | |
205 | EXPORT_SYMBOL_GPL(mlx4_bf_alloc); | |
206 | ||
207 | void 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 | } | |
231 | EXPORT_SYMBOL_GPL(mlx4_bf_free); | |
232 | ||
225c7b1f RD |
233 | int mlx4_init_uar_table(struct mlx4_dev *dev) |
234 | { | |
76442640 RD |
235 | 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 | ||
225c7b1f RD |
242 | return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap, |
243 | dev->caps.num_uars, dev->caps.num_uars - 1, | |
f5311ac1 | 244 | dev->caps.reserved_uars, 0); |
225c7b1f RD |
245 | } |
246 | ||
247 | void mlx4_cleanup_uar_table(struct mlx4_dev *dev) | |
248 | { | |
249 | mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap); | |
250 | } |