hcp_phyp.c revision 1988d1fa1a9d642c5714a6afc9775fba0627f3ed 
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
45int hcall_map_page(u64 physaddr, u64 *mapaddr)
46{
47	*mapaddr = (u64)(ioremap(physaddr, EHCA_PAGESIZE));
48	return 0;
49}
50
51int hcall_unmap_page(u64 mapaddr)
52{
53	iounmap((volatile void __iomem *) mapaddr);
54	return 0;
55}
56
57int hcp_galpas_ctor(struct h_galpas *galpas, int is_user,
58		    u64 paddr_kernel, u64 paddr_user)
59{
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;
66
67	galpas->user.fw_handle = paddr_user;
68
69	return 0;
70}
71
72int 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}
84