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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 | ||
012a8ff5 SH |
66 | int mlx4_xrcd_alloc(struct mlx4_dev *dev, u32 *xrcdn) |
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 | } | |
76 | EXPORT_SYMBOL_GPL(mlx4_xrcd_alloc); | |
77 | ||
78 | void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn) | |
79 | { | |
80 | mlx4_bitmap_free(&mlx4_priv(dev)->xrcd_bitmap, xrcdn); | |
81 | } | |
82 | EXPORT_SYMBOL_GPL(mlx4_xrcd_free); | |
83 | ||
3d73c288 | 84 | int mlx4_init_pd_table(struct mlx4_dev *dev) |
225c7b1f RD |
85 | { |
86 | struct mlx4_priv *priv = mlx4_priv(dev); | |
87 | ||
88 | return mlx4_bitmap_init(&priv->pd_bitmap, dev->caps.num_pds, | |
f5311ac1 JM |
89 | (1 << NOT_MASKED_PD_BITS) - 1, |
90 | dev->caps.reserved_pds, 0); | |
225c7b1f RD |
91 | } |
92 | ||
93 | void mlx4_cleanup_pd_table(struct mlx4_dev *dev) | |
94 | { | |
95 | mlx4_bitmap_cleanup(&mlx4_priv(dev)->pd_bitmap); | |
96 | } | |
97 | ||
012a8ff5 SH |
98 | int mlx4_init_xrcd_table(struct mlx4_dev *dev) |
99 | { | |
100 | struct mlx4_priv *priv = mlx4_priv(dev); | |
101 | ||
102 | return mlx4_bitmap_init(&priv->xrcd_bitmap, (1 << 16), | |
103 | (1 << 16) - 1, dev->caps.reserved_xrcds + 1, 0); | |
104 | } | |
105 | ||
106 | void mlx4_cleanup_xrcd_table(struct mlx4_dev *dev) | |
107 | { | |
108 | mlx4_bitmap_cleanup(&mlx4_priv(dev)->xrcd_bitmap); | |
109 | } | |
225c7b1f RD |
110 | |
111 | int mlx4_uar_alloc(struct mlx4_dev *dev, struct mlx4_uar *uar) | |
112 | { | |
f5311ac1 JM |
113 | int offset; |
114 | ||
225c7b1f RD |
115 | uar->index = mlx4_bitmap_alloc(&mlx4_priv(dev)->uar_table.bitmap); |
116 | if (uar->index == -1) | |
117 | return -ENOMEM; | |
118 | ||
f5311ac1 JM |
119 | if (mlx4_is_slave(dev)) |
120 | offset = uar->index % ((int) pci_resource_len(dev->pdev, 2) / | |
121 | dev->caps.uar_page_size); | |
122 | else | |
123 | offset = uar->index; | |
124 | uar->pfn = (pci_resource_start(dev->pdev, 2) >> PAGE_SHIFT) + offset; | |
c1b43dca | 125 | uar->map = NULL; |
225c7b1f RD |
126 | return 0; |
127 | } | |
128 | EXPORT_SYMBOL_GPL(mlx4_uar_alloc); | |
129 | ||
130 | void mlx4_uar_free(struct mlx4_dev *dev, struct mlx4_uar *uar) | |
131 | { | |
132 | mlx4_bitmap_free(&mlx4_priv(dev)->uar_table.bitmap, uar->index); | |
133 | } | |
134 | EXPORT_SYMBOL_GPL(mlx4_uar_free); | |
135 | ||
c1b43dca EC |
136 | int mlx4_bf_alloc(struct mlx4_dev *dev, struct mlx4_bf *bf) |
137 | { | |
138 | struct mlx4_priv *priv = mlx4_priv(dev); | |
139 | struct mlx4_uar *uar; | |
140 | int err = 0; | |
141 | int idx; | |
142 | ||
143 | if (!priv->bf_mapping) | |
144 | return -ENOMEM; | |
145 | ||
146 | mutex_lock(&priv->bf_mutex); | |
147 | if (!list_empty(&priv->bf_list)) | |
148 | uar = list_entry(priv->bf_list.next, struct mlx4_uar, bf_list); | |
149 | else { | |
9ace5e01 EC |
150 | if (mlx4_bitmap_avail(&priv->uar_table.bitmap) < MLX4_NUM_RESERVED_UARS) { |
151 | err = -ENOMEM; | |
152 | goto out; | |
153 | } | |
c1b43dca EC |
154 | uar = kmalloc(sizeof *uar, GFP_KERNEL); |
155 | if (!uar) { | |
156 | err = -ENOMEM; | |
157 | goto out; | |
158 | } | |
159 | err = mlx4_uar_alloc(dev, uar); | |
160 | if (err) | |
161 | goto free_kmalloc; | |
162 | ||
163 | uar->map = ioremap(uar->pfn << PAGE_SHIFT, PAGE_SIZE); | |
164 | if (!uar->map) { | |
165 | err = -ENOMEM; | |
166 | goto free_uar; | |
167 | } | |
168 | ||
169 | uar->bf_map = io_mapping_map_wc(priv->bf_mapping, uar->index << PAGE_SHIFT); | |
170 | if (!uar->bf_map) { | |
171 | err = -ENOMEM; | |
172 | goto unamp_uar; | |
173 | } | |
174 | uar->free_bf_bmap = 0; | |
175 | list_add(&uar->bf_list, &priv->bf_list); | |
176 | } | |
177 | ||
178 | bf->uar = uar; | |
179 | idx = ffz(uar->free_bf_bmap); | |
180 | uar->free_bf_bmap |= 1 << idx; | |
181 | bf->uar = uar; | |
182 | bf->offset = 0; | |
183 | bf->buf_size = dev->caps.bf_reg_size / 2; | |
184 | bf->reg = uar->bf_map + idx * dev->caps.bf_reg_size; | |
185 | if (uar->free_bf_bmap == (1 << dev->caps.bf_regs_per_page) - 1) | |
186 | list_del_init(&uar->bf_list); | |
187 | ||
188 | goto out; | |
189 | ||
190 | unamp_uar: | |
191 | bf->uar = NULL; | |
192 | iounmap(uar->map); | |
193 | ||
194 | free_uar: | |
195 | mlx4_uar_free(dev, uar); | |
196 | ||
197 | free_kmalloc: | |
198 | kfree(uar); | |
199 | ||
200 | out: | |
201 | mutex_unlock(&priv->bf_mutex); | |
202 | return err; | |
203 | } | |
204 | EXPORT_SYMBOL_GPL(mlx4_bf_alloc); | |
205 | ||
206 | void mlx4_bf_free(struct mlx4_dev *dev, struct mlx4_bf *bf) | |
207 | { | |
208 | struct mlx4_priv *priv = mlx4_priv(dev); | |
209 | int idx; | |
210 | ||
211 | if (!bf->uar || !bf->uar->bf_map) | |
212 | return; | |
213 | ||
214 | mutex_lock(&priv->bf_mutex); | |
215 | idx = (bf->reg - bf->uar->bf_map) / dev->caps.bf_reg_size; | |
216 | bf->uar->free_bf_bmap &= ~(1 << idx); | |
217 | if (!bf->uar->free_bf_bmap) { | |
218 | if (!list_empty(&bf->uar->bf_list)) | |
219 | list_del(&bf->uar->bf_list); | |
220 | ||
221 | io_mapping_unmap(bf->uar->bf_map); | |
222 | iounmap(bf->uar->map); | |
223 | mlx4_uar_free(dev, bf->uar); | |
224 | kfree(bf->uar); | |
225 | } else if (list_empty(&bf->uar->bf_list)) | |
226 | list_add(&bf->uar->bf_list, &priv->bf_list); | |
227 | ||
228 | mutex_unlock(&priv->bf_mutex); | |
229 | } | |
230 | EXPORT_SYMBOL_GPL(mlx4_bf_free); | |
231 | ||
225c7b1f RD |
232 | int mlx4_init_uar_table(struct mlx4_dev *dev) |
233 | { | |
76442640 RD |
234 | if (dev->caps.num_uars <= 128) { |
235 | mlx4_err(dev, "Only %d UAR pages (need more than 128)\n", | |
236 | dev->caps.num_uars); | |
237 | mlx4_err(dev, "Increase firmware log2_uar_bar_megabytes?\n"); | |
238 | return -ENODEV; | |
239 | } | |
240 | ||
225c7b1f RD |
241 | return mlx4_bitmap_init(&mlx4_priv(dev)->uar_table.bitmap, |
242 | dev->caps.num_uars, dev->caps.num_uars - 1, | |
f5311ac1 | 243 | dev->caps.reserved_uars, 0); |
225c7b1f RD |
244 | } |
245 | ||
246 | void mlx4_cleanup_uar_table(struct mlx4_dev *dev) | |
247 | { | |
248 | mlx4_bitmap_cleanup(&mlx4_priv(dev)->uar_table.bitmap); | |
249 | } |