aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/misc/sgi-xp/xp_uv.c
blob: d238576b26fa9b6c8f5d96b8f41760db444d43f1 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (c) 2008 Silicon Graphics, Inc.  All Rights Reserved.
 */

/*
 * Cross Partition (XP) uv-based functions.
 *
 *      Architecture specific implementation of common functions.
 *
 */

#include <linux/device.h>
#include <asm/uv/uv_hub.h>
#if defined CONFIG_X86_64
#include <asm/uv/bios.h>
#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
#include <asm/sn/sn_sal.h>
#endif
#include "../sgi-gru/grukservices.h"
#include "xp.h"

/*
 * Convert a virtual memory address to a physical memory address.
 */
static unsigned long
xp_pa_uv(void *addr)
{
	return uv_gpa(addr);
}

static enum xp_retval
xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
		    size_t len)
{
	int ret;

	ret = gru_copy_gpa(dst_gpa, src_gpa, len);
	if (ret == 0)
		return xpSuccess;

	dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
		"len=%ld\n", dst_gpa, src_gpa, len);
	return xpGruCopyError;
}

static int
xp_cpu_to_nasid_uv(int cpuid)
{
	/* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */
	return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid));
}

static enum xp_retval
xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size)
{
	int ret;

#if defined CONFIG_X86_64
	ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW);
	if (ret != BIOS_STATUS_SUCCESS) {
		dev_err(xp, "uv_bios_change_memprotect(,, "
			"UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret);
		return xpBiosError;
	}

#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
	u64 nasid_array;

	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_1,
				   &nasid_array);
	if (ret != 0) {
		dev_err(xp, "sn_change_memprotect(,, "
			"SN_MEMPROT_ACCESS_CLASS_1,) failed ret=%d\n", ret);
		return xpSalError;
	}
#else
	#error not a supported configuration
#endif
	return xpSuccess;
}

static enum xp_retval
xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size)
{
	int ret;

#if defined CONFIG_X86_64
	ret = uv_bios_change_memprotect(phys_addr, size,
					UV_MEMPROT_RESTRICT_ACCESS);
	if (ret != BIOS_STATUS_SUCCESS) {
		dev_err(xp, "uv_bios_change_memprotect(,, "
			"UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret);
		return xpBiosError;
	}

#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
	u64 nasid_array;

	ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_0,
				   &nasid_array);
	if (ret != 0) {
		dev_err(xp, "sn_change_memprotect(,, "
			"SN_MEMPROT_ACCESS_CLASS_0,) failed ret=%d\n", ret);
		return xpSalError;
	}
#else
	#error not a supported configuration
#endif
	return xpSuccess;
}

enum xp_retval
xp_init_uv(void)
{
	BUG_ON(!is_uv());

	xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
	xp_partition_id = sn_partition_id;
	xp_region_size = sn_region_size;

	xp_pa = xp_pa_uv;
	xp_remote_memcpy = xp_remote_memcpy_uv;
	xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
	xp_expand_memprotect = xp_expand_memprotect_uv;
	xp_restrict_memprotect = xp_restrict_memprotect_uv;

	return xpSuccess;
}

void
xp_exit_uv(void)
{
	BUG_ON(!is_uv());
}