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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* BIOS run time interface routines.
*
* Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved.
* Copyright (c) Russ Anderson <rja@sgi.com>
*/
#include <linux/efi.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <asm/efi.h>
#include <linux/io.h>
#include <asm/uv/bios.h>
#include <asm/uv/uv_hub.h>
unsigned long uv_systab_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
struct uv_systab *uv_systab;
static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
u64 a4, u64 a5)
{
struct uv_systab *tab = uv_systab;
s64 ret;
if (!tab || !tab->function)
/*
* BIOS does not support UV systab
*/
return BIOS_STATUS_UNIMPLEMENTED;
/*
* If EFI_OLD_MEMMAP is set, we need to fall back to using our old EFI
* callback method, which uses efi_call() directly, with the kernel page tables:
*/
if (unlikely(efi_enabled(EFI_OLD_MEMMAP)))
ret = efi_call((void *)__va(tab->function), (u64)which, a1, a2, a3, a4, a5);
else
ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5);
return ret;
}
s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
{
s64 ret;
if (down_interruptible(&__efi_uv_runtime_lock))
return BIOS_STATUS_ABORT;
ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
up(&__efi_uv_runtime_lock);
return ret;
}
EXPORT_SYMBOL_GPL(uv_bios_call);
s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
u64 a4, u64 a5)
{
unsigned long bios_flags;
s64 ret;
if (down_interruptible(&__efi_uv_runtime_lock))
return BIOS_STATUS_ABORT;
local_irq_save(bios_flags);
ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
local_irq_restore(bios_flags);
up(&__efi_uv_runtime_lock);
return ret;
}
long sn_partition_id;
EXPORT_SYMBOL_GPL(sn_partition_id);
long sn_coherency_id;
EXPORT_SYMBOL_GPL(sn_coherency_id);
long sn_region_size;
EXPORT_SYMBOL_GPL(sn_region_size);
long system_serial_number;
EXPORT_SYMBOL_GPL(system_serial_number);
int uv_type;
EXPORT_SYMBOL_GPL(uv_type);
s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
long *region, long *ssn)
{
s64 ret;
u64 v0, v1;
union partition_info_u part;
ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
(u64)(&v0), (u64)(&v1), 0, 0);
if (ret != BIOS_STATUS_SUCCESS)
return ret;
part.val = v0;
if (uvtype)
*uvtype = part.hub_version;
if (partid)
*partid = part.partition_id;
if (coher)
*coher = part.coherence_id;
if (region)
*region = part.region_size;
if (ssn)
*ssn = v1;
return ret;
}
EXPORT_SYMBOL_GPL(uv_bios_get_sn_info);
int
uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
unsigned long *intr_mmr_offset)
{
u64 watchlist;
s64 ret;
/*
* bios returns watchlist number or negative error number.
*/
ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
mq_size, (u64)intr_mmr_offset,
(u64)&watchlist, 0);
if (ret < BIOS_STATUS_SUCCESS)
return ret;
return watchlist;
}
EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
int
uv_bios_mq_watchlist_free(int blade, int watchlist_num)
{
return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
blade, watchlist_num, 0, 0, 0);
}
EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
s64
uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
{
return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
perms, 0, 0);
}
EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
s64
uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
{
return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
(u64)addr, buf, (u64)len, 0);
}
EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
{
return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
(u64)ticks_per_second, 0, 0, 0);
}
EXPORT_SYMBOL_GPL(uv_bios_freq_base);
/*
* uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
* @decode: true to enable target, false to disable target
* @domain: PCI domain number
* @bus: PCI bus number
*
* Returns:
* 0: Success
* -EINVAL: Invalid domain or bus number
* -ENOSYS: Capability not available
* -EBUSY: Legacy VGA I/O cannot be retargeted at this time
*/
int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
{
return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
(u64)decode, (u64)domain, (u64)bus, 0, 0);
}
EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target);
void uv_bios_init(void)
{
uv_systab = NULL;
if ((uv_systab_phys == EFI_INVALID_TABLE_ADDR) ||
!uv_systab_phys || efi_runtime_disabled()) {
pr_crit("UV: UVsystab: missing\n");
return;
}
uv_systab = ioremap(uv_systab_phys, sizeof(struct uv_systab));
if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) {
pr_err("UV: UVsystab: bad signature!\n");
iounmap(uv_systab);
return;
}
/* Starting with UV4 the UV systab size is variable */
if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) {
int size = uv_systab->size;
iounmap(uv_systab);
uv_systab = ioremap(uv_systab_phys, size);
if (!uv_systab) {
pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
return;
}
}
pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision);
}
|
