2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
35 static u32 convert_access(int acc)
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) |
44 struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
46 struct mlx4_ib_mr *mr;
49 mr = kmalloc(sizeof *mr, GFP_KERNEL);
51 return ERR_PTR(-ENOMEM);
53 err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
54 ~0ull, convert_access(acc), 0, 0, &mr->mmr);
58 err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
62 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
68 mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
76 int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
80 struct ib_umem_chunk *chunk;
86 pages = (u64 *) __get_free_page(GFP_KERNEL);
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]) +
99 * Be friendly to WRITE_MTT firmware
100 * command, and pass it chunks of
103 if (i == PAGE_SIZE / sizeof (u64) - 2) {
104 err = mlx4_write_mtt(dev->dev, mtt, n,
115 err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
118 free_page((unsigned long) pages);
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)
126 struct mlx4_ib_dev *dev = to_mdev(pd->device);
127 struct mlx4_ib_mr *mr;
132 mr = kmalloc(sizeof *mr, GFP_KERNEL);
134 return ERR_PTR(-ENOMEM);
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);
142 n = ib_umem_page_count(mr->umem);
143 shift = ilog2(mr->umem->page_size);
145 err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
146 convert_access(access_flags), n, shift, &mr->mmr);
150 err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
154 err = mlx4_mr_enable(dev->dev, &mr->mmr);
158 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
163 mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
166 ib_umem_release(mr->umem);
174 int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
176 struct mlx4_ib_mr *mr = to_mmr(ibmr);
178 mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
180 ib_umem_release(mr->umem);