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1 | /* |
2 | * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. | |
3 | * | |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include "mlx4_ib.h" | |
34 | ||
35 | static u32 convert_access(int acc) | |
36 | { | |
37 | return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC : 0) | | |
38 | (acc & IB_ACCESS_REMOTE_WRITE ? MLX4_PERM_REMOTE_WRITE : 0) | | |
39 | (acc & IB_ACCESS_REMOTE_READ ? MLX4_PERM_REMOTE_READ : 0) | | |
40 | (acc & IB_ACCESS_LOCAL_WRITE ? MLX4_PERM_LOCAL_WRITE : 0) | | |
41 | MLX4_PERM_LOCAL_READ; | |
42 | } | |
43 | ||
44 | struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc) | |
45 | { | |
46 | struct mlx4_ib_mr *mr; | |
47 | int err; | |
48 | ||
49 | mr = kmalloc(sizeof *mr, GFP_KERNEL); | |
50 | if (!mr) | |
51 | return ERR_PTR(-ENOMEM); | |
52 | ||
53 | err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0, | |
54 | ~0ull, convert_access(acc), 0, 0, &mr->mmr); | |
55 | if (err) | |
56 | goto err_free; | |
57 | ||
58 | err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr); | |
59 | if (err) | |
60 | goto err_mr; | |
61 | ||
62 | mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; | |
63 | mr->umem = NULL; | |
64 | ||
65 | return &mr->ibmr; | |
66 | ||
67 | err_mr: | |
68 | mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); | |
69 | ||
70 | err_free: | |
71 | kfree(mr); | |
72 | ||
73 | return ERR_PTR(err); | |
74 | } | |
75 | ||
76 | int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt, | |
77 | struct ib_umem *umem) | |
78 | { | |
79 | u64 *pages; | |
80 | struct ib_umem_chunk *chunk; | |
81 | int i, j, k; | |
82 | int n; | |
83 | int len; | |
84 | int err = 0; | |
85 | ||
86 | pages = (u64 *) __get_free_page(GFP_KERNEL); | |
87 | if (!pages) | |
88 | return -ENOMEM; | |
89 | ||
90 | i = n = 0; | |
91 | ||
92 | list_for_each_entry(chunk, &umem->chunk_list, list) | |
93 | for (j = 0; j < chunk->nmap; ++j) { | |
94 | len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift; | |
95 | for (k = 0; k < len; ++k) { | |
96 | pages[i++] = sg_dma_address(&chunk->page_list[j]) + | |
97 | umem->page_size * k; | |
98 | /* | |
99 | * Be friendly to WRITE_MTT firmware | |
100 | * command, and pass it chunks of | |
101 | * appropriate size. | |
102 | */ | |
103 | if (i == PAGE_SIZE / sizeof (u64) - 2) { | |
104 | err = mlx4_write_mtt(dev->dev, mtt, n, | |
105 | i, pages); | |
106 | if (err) | |
107 | goto out; | |
108 | n += i; | |
109 | i = 0; | |
110 | } | |
111 | } | |
112 | } | |
113 | ||
114 | if (i) | |
115 | err = mlx4_write_mtt(dev->dev, mtt, n, i, pages); | |
116 | ||
117 | out: | |
118 | free_page((unsigned long) pages); | |
119 | return err; | |
120 | } | |
121 | ||
122 | struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, | |
123 | u64 virt_addr, int access_flags, | |
124 | struct ib_udata *udata) | |
125 | { | |
126 | struct mlx4_ib_dev *dev = to_mdev(pd->device); | |
127 | struct mlx4_ib_mr *mr; | |
128 | int shift; | |
129 | int err; | |
130 | int n; | |
131 | ||
132 | mr = kmalloc(sizeof *mr, GFP_KERNEL); | |
133 | if (!mr) | |
134 | return ERR_PTR(-ENOMEM); | |
135 | ||
136 | mr->umem = ib_umem_get(pd->uobject->context, start, length, access_flags); | |
137 | if (IS_ERR(mr->umem)) { | |
138 | err = PTR_ERR(mr->umem); | |
139 | goto err_free; | |
140 | } | |
141 | ||
142 | n = ib_umem_page_count(mr->umem); | |
143 | shift = ilog2(mr->umem->page_size); | |
144 | ||
145 | err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length, | |
146 | convert_access(access_flags), n, shift, &mr->mmr); | |
147 | if (err) | |
148 | goto err_umem; | |
149 | ||
150 | err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem); | |
151 | if (err) | |
152 | goto err_mr; | |
153 | ||
154 | err = mlx4_mr_enable(dev->dev, &mr->mmr); | |
155 | if (err) | |
156 | goto err_mr; | |
157 | ||
158 | mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; | |
159 | ||
160 | return &mr->ibmr; | |
161 | ||
162 | err_mr: | |
163 | mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); | |
164 | ||
165 | err_umem: | |
166 | ib_umem_release(mr->umem); | |
167 | ||
168 | err_free: | |
169 | kfree(mr); | |
170 | ||
171 | return ERR_PTR(err); | |
172 | } | |
173 | ||
174 | int mlx4_ib_dereg_mr(struct ib_mr *ibmr) | |
175 | { | |
176 | struct mlx4_ib_mr *mr = to_mmr(ibmr); | |
177 | ||
178 | mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr); | |
179 | if (mr->umem) | |
180 | ib_umem_release(mr->umem); | |
181 | kfree(mr); | |
182 | ||
183 | return 0; | |
184 | } |