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6f231dda DW |
1 | /* |
2 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
3 | * redistributing this file, you may do so under either license. | |
4 | * | |
5 | * GPL LICENSE SUMMARY | |
6 | * | |
7 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of version 2 of the GNU General Public License as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | * The full GNU General Public License is included in this distribution | |
22 | * in the file called LICENSE.GPL. | |
23 | * | |
24 | * BSD LICENSE | |
25 | * | |
26 | * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. | |
27 | * All rights reserved. | |
28 | * | |
29 | * Redistribution and use in source and binary forms, with or without | |
30 | * modification, are permitted provided that the following conditions | |
31 | * are met: | |
32 | * | |
33 | * * Redistributions of source code must retain the above copyright | |
34 | * notice, this list of conditions and the following disclaimer. | |
35 | * * Redistributions in binary form must reproduce the above copyright | |
36 | * notice, this list of conditions and the following disclaimer in | |
37 | * the documentation and/or other materials provided with the | |
38 | * distribution. | |
39 | * * Neither the name of Intel Corporation nor the names of its | |
40 | * contributors may be used to endorse or promote products derived | |
41 | * from this software without specific prior written permission. | |
42 | * | |
43 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
44 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
45 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
46 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
47 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
48 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
49 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
50 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
51 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
52 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
53 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
54 | */ | |
55 | ||
103a00c2 | 56 | #include <linux/kernel.h> |
6f231dda | 57 | #include "sci_util.h" |
103a00c2 | 58 | #include "sci_environment.h" |
6f231dda | 59 | |
103a00c2 DJ |
60 | void *scic_request_get_virt_addr(struct scic_sds_request *sci_req, dma_addr_t phys_addr) |
61 | { | |
67ea838d | 62 | struct isci_request *ireq = sci_req_to_ireq(sci_req); |
103a00c2 DJ |
63 | dma_addr_t offset; |
64 | ||
65 | BUG_ON(phys_addr < ireq->request_daddr); | |
66 | ||
67 | offset = phys_addr - ireq->request_daddr; | |
68 | ||
67ea838d | 69 | BUG_ON(offset >= sizeof(*ireq)); |
103a00c2 DJ |
70 | |
71 | return (char *)ireq + offset; | |
72 | } | |
73 | ||
6389a775 DJ |
74 | dma_addr_t scic_io_request_get_dma_addr(struct scic_sds_request *sds_request, |
75 | void *virt_addr) | |
76 | { | |
67ea838d | 77 | struct isci_request *isci_request = sci_req_to_ireq(sds_request); |
6389a775 DJ |
78 | |
79 | char *requested_addr = (char *)virt_addr; | |
80 | char *base_addr = (char *)isci_request; | |
81 | ||
82 | BUG_ON(requested_addr < base_addr); | |
67ea838d | 83 | BUG_ON((requested_addr - base_addr) >= sizeof(*isci_request)); |
6389a775 DJ |
84 | |
85 | return isci_request->request_daddr + (requested_addr - base_addr); | |
86 | } |