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/drivers/infiniband/hw/ehca/hcp_phyp.c

https://bitbucket.org/ndreys/linux-sunxi
C | 82 lines | 33 code | 9 blank | 40 comment | 4 complexity | 2a977ad5154dd877d9ce1dec200a1a90 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
 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
45u64 hcall_map_page(u64 physaddr)
46{
47	return (u64)ioremap(physaddr, EHCA_PAGESIZE);
48}
49
50int hcall_unmap_page(u64 mapaddr)
51{
52	iounmap((volatile void __iomem *) mapaddr);
53	return 0;
54}
55
56int 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
71int 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}