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
hcall_map_page(u64 physaddr)45 u64 hcall_map_page(u64 physaddr)
46 {
47 return (u64)ioremap(physaddr, EHCA_PAGESIZE);
48 }
49
hcall_unmap_page(u64 mapaddr)50 int hcall_unmap_page(u64 mapaddr)
51 {
52 iounmap((volatile void __iomem *) mapaddr);
53 return 0;
54 }
55
hcp_galpas_ctor(struct h_galpas * galpas,int is_user,u64 paddr_kernel,u64 paddr_user)56 int hcp_galpas_ctor(struct h_galpas *galpas, int is_user,
57 u64 paddr_kernel, u64 paddr_user)
58 {
59 if (!is_user) {
60 galpas->kernel.fw_handle = hcall_map_page(paddr_kernel);
61 if (!galpas->kernel.fw_handle)
62 return -ENOMEM;
63 } else
64 galpas->kernel.fw_handle = 0;
65
66 galpas->user.fw_handle = paddr_user;
67
68 return 0;
69 }
70
hcp_galpas_dtor(struct h_galpas * galpas)71 int hcp_galpas_dtor(struct h_galpas *galpas)
72 {
73 if (galpas->kernel.fw_handle) {
74 int ret = hcall_unmap_page(galpas->kernel.fw_handle);
75 if (ret)
76 return ret;
77 }
78
79 galpas->user.fw_handle = galpas->kernel.fw_handle = 0;
80
81 return 0;
82 }
83