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
|
/*
* 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) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/vmalloc.h>
#include <asm/mca.h>
#include <asm/sal.h>
#include <asm/sn/sn_sal.h>
/*
* Interval for calling SAL to poll for errors that do NOT cause error
* interrupts. SAL will raise a CPEI if any errors are present that
* need to be logged.
*/
#define CPEI_INTERVAL (5*HZ)
struct timer_list sn_cpei_timer;
void sn_init_cpei_timer(void);
/* Printing oemdata from mca uses data that is not passed through SAL, it is
* global. Only one user at a time.
*/
static DECLARE_MUTEX(sn_oemdata_mutex);
static u8 **sn_oemdata;
static u64 *sn_oemdata_size, sn_oemdata_bufsize;
/*
* print_hook
*
* This function is the callback routine that SAL calls to log error
* info for platform errors. buf is appended to sn_oemdata, resizing as
* required.
* Note: this is a SAL to OS callback, running under the same rules as the SAL
* code. SAL calls are run with preempt disabled so this routine must not
* sleep. vmalloc can sleep so print_hook cannot resize the output buffer
* itself, instead it must set the required size and return to let the caller
* resize the buffer then redrive the SAL call.
*/
static int print_hook(const char *fmt, ...)
{
char buf[400];
int len;
va_list args;
va_start(args, fmt);
vsnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
len = strlen(buf);
if (*sn_oemdata_size + len <= sn_oemdata_bufsize)
memcpy(*sn_oemdata + *sn_oemdata_size, buf, len);
*sn_oemdata_size += len;
return 0;
}
static void sn_cpei_handler(int irq, void *devid, struct pt_regs *regs)
{
/*
* this function's sole purpose is to call SAL when we receive
* a CE interrupt from SHUB or when the timer routine decides
* we need to call SAL to check for CEs.
*/
/* CALL SAL_LOG_CE */
ia64_sn_plat_cpei_handler();
}
static void sn_cpei_timer_handler(unsigned long dummy)
{
sn_cpei_handler(-1, NULL, NULL);
mod_timer(&sn_cpei_timer, jiffies + CPEI_INTERVAL);
}
void sn_init_cpei_timer(void)
{
init_timer(&sn_cpei_timer);
sn_cpei_timer.expires = jiffies + CPEI_INTERVAL;
sn_cpei_timer.function = sn_cpei_timer_handler;
add_timer(&sn_cpei_timer);
}
static int
sn_platform_plat_specific_err_print(const u8 * sect_header, u8 ** oemdata,
u64 * oemdata_size)
{
down(&sn_oemdata_mutex);
sn_oemdata = oemdata;
sn_oemdata_size = oemdata_size;
sn_oemdata_bufsize = 0;
*sn_oemdata_size = PAGE_SIZE; /* first guess at how much data will be generated */
while (*sn_oemdata_size > sn_oemdata_bufsize) {
u8 *newbuf = vmalloc(*sn_oemdata_size);
if (!newbuf) {
printk(KERN_ERR "%s: unable to extend sn_oemdata\n",
__FUNCTION__);
return 1;
}
vfree(*sn_oemdata);
*sn_oemdata = newbuf;
sn_oemdata_bufsize = *sn_oemdata_size;
*sn_oemdata_size = 0;
ia64_sn_plat_specific_err_print(print_hook, (char *)sect_header);
}
up(&sn_oemdata_mutex);
return 0;
}
/* Callback when userspace salinfo wants to decode oem data via the platform
* kernel and/or prom.
*/
int sn_salinfo_platform_oemdata(const u8 *sect_header, u8 **oemdata, u64 *oemdata_size)
{
efi_guid_t guid = *(efi_guid_t *)sect_header;
int valid = 0;
*oemdata_size = 0;
vfree(*oemdata);
*oemdata = NULL;
if (efi_guidcmp(guid, SAL_PLAT_SPECIFIC_ERR_SECT_GUID) == 0) {
sal_log_plat_specific_err_info_t *psei = (sal_log_plat_specific_err_info_t *)sect_header;
valid = psei->valid.oem_data;
} else if (efi_guidcmp(guid, SAL_PLAT_MEM_DEV_ERR_SECT_GUID) == 0) {
sal_log_mem_dev_err_info_t *mdei = (sal_log_mem_dev_err_info_t *)sect_header;
valid = mdei->valid.oem_data;
}
if (valid)
return sn_platform_plat_specific_err_print(sect_header, oemdata, oemdata_size);
else
return 0;
}
static int __init sn_salinfo_init(void)
{
salinfo_platform_oemdata = &sn_salinfo_platform_oemdata;
return 0;
}
module_init(sn_salinfo_init)
|
