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fab97220 HS |
1 | /* |
2 | * IBM eServer eHCA Infiniband device driver for Linux on POWER | |
3 | * | |
4 | * load store abstraction for ehca register access with tracing | |
5 | * | |
6 | * Authors: Christoph Raisch <raisch@de.ibm.com> | |
7 | * Hoang-Nam Nguyen <hnguyen@de.ibm.com> | |
8 | * | |
9 | * Copyright (c) 2005 IBM Corporation | |
10 | * | |
11 | * All rights reserved. | |
12 | * | |
13 | * This source code is distributed under a dual license of GPL v2.0 and OpenIB | |
14 | * BSD. | |
15 | * | |
16 | * OpenIB BSD License | |
17 | * | |
18 | * Redistribution and use in source and binary forms, with or without | |
19 | * modification, are permitted provided that the following conditions are met: | |
20 | * | |
21 | * Redistributions of source code must retain the above copyright notice, this | |
22 | * list of conditions and the following disclaimer. | |
23 | * | |
24 | * Redistributions in binary form must reproduce the above copyright notice, | |
25 | * this list of conditions and the following disclaimer in the documentation | |
26 | * and/or other materials | |
27 | * provided with the distribution. | |
28 | * | |
29 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
30 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
31 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
32 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
33 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
34 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
35 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
36 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | |
37 | * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
38 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
39 | * POSSIBILITY OF SUCH DAMAGE. | |
40 | */ | |
41 | ||
42 | #include "ehca_classes.h" | |
43 | #include "hipz_hw.h" | |
44 | ||
45 | int hcall_map_page(u64 physaddr, u64 *mapaddr) | |
46 | { | |
47 | *mapaddr = (u64)(ioremap(physaddr, EHCA_PAGESIZE)); | |
48 | return 0; | |
49 | } | |
50 | ||
51 | int hcall_unmap_page(u64 mapaddr) | |
52 | { | |
2b94397a | 53 | iounmap((volatile void __iomem *) mapaddr); |
fab97220 HS |
54 | return 0; |
55 | } | |
56 | ||
1988d1fa | 57 | int hcp_galpas_ctor(struct h_galpas *galpas, int is_user, |
fab97220 HS |
58 | u64 paddr_kernel, u64 paddr_user) |
59 | { | |
1988d1fa SR |
60 | if (!is_user) { |
61 | int ret = hcall_map_page(paddr_kernel, &galpas->kernel.fw_handle); | |
62 | if (ret) | |
63 | return ret; | |
64 | } else | |
65 | galpas->kernel.fw_handle = 0; | |
fab97220 HS |
66 | |
67 | galpas->user.fw_handle = paddr_user; | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
72 | int hcp_galpas_dtor(struct h_galpas *galpas) | |
73 | { | |
74 | if (galpas->kernel.fw_handle) { | |
75 | int ret = hcall_unmap_page(galpas->kernel.fw_handle); | |
76 | if (ret) | |
77 | return ret; | |
78 | } | |
79 | ||
80 | galpas->user.fw_handle = galpas->kernel.fw_handle = 0; | |
81 | ||
82 | return 0; | |
83 | } |