2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
9 #include <linux/types.h>
10 #include <linux/kernel.h>
11 #include <linux/timer.h>
12 #include <linux/vmalloc.h>
15 #include <asm/sn/sn_sal.h>
18 * Interval for calling SAL to poll for errors that do NOT cause error
19 * interrupts. SAL will raise a CPEI if any errors are present that
22 #define CPEI_INTERVAL (5*HZ)
24 struct timer_list sn_cpei_timer
;
25 void sn_init_cpei_timer(void);
27 /* Printing oemdata from mca uses data that is not passed through SAL, it is
28 * global. Only one user at a time.
30 static DECLARE_MUTEX(sn_oemdata_mutex
);
31 static u8
**sn_oemdata
;
32 static u64
*sn_oemdata_size
, sn_oemdata_bufsize
;
37 * This function is the callback routine that SAL calls to log error
38 * info for platform errors. buf is appended to sn_oemdata, resizing as
41 static int print_hook(const char *fmt
, ...)
47 vsnprintf(buf
, sizeof(buf
), fmt
, args
);
50 while (*sn_oemdata_size
+ len
+ 1 > sn_oemdata_bufsize
) {
51 u8
*newbuf
= vmalloc(sn_oemdata_bufsize
+= 1000);
53 printk(KERN_ERR
"%s: unable to extend sn_oemdata\n",
57 memcpy(newbuf
, *sn_oemdata
, *sn_oemdata_size
);
61 memcpy(*sn_oemdata
+ *sn_oemdata_size
, buf
, len
+ 1);
62 *sn_oemdata_size
+= len
;
66 static void sn_cpei_handler(int irq
, void *devid
, struct pt_regs
*regs
)
69 * this function's sole purpose is to call SAL when we receive
70 * a CE interrupt from SHUB or when the timer routine decides
71 * we need to call SAL to check for CEs.
76 ia64_sn_plat_cpei_handler();
79 static void sn_cpei_timer_handler(unsigned long dummy
)
81 sn_cpei_handler(-1, NULL
, NULL
);
82 mod_timer(&sn_cpei_timer
, jiffies
+ CPEI_INTERVAL
);
85 void sn_init_cpei_timer(void)
87 init_timer(&sn_cpei_timer
);
88 sn_cpei_timer
.expires
= jiffies
+ CPEI_INTERVAL
;
89 sn_cpei_timer
.function
= sn_cpei_timer_handler
;
90 add_timer(&sn_cpei_timer
);
94 sn_platform_plat_specific_err_print(const u8
* sect_header
, u8
** oemdata
,
97 down(&sn_oemdata_mutex
);
99 sn_oemdata_size
= oemdata_size
;
100 sn_oemdata_bufsize
= 0;
101 ia64_sn_plat_specific_err_print(print_hook
, (char *)sect_header
);
102 up(&sn_oemdata_mutex
);
106 /* Callback when userspace salinfo wants to decode oem data via the platform
107 * kernel and/or prom.
109 int sn_salinfo_platform_oemdata(const u8
*sect_header
, u8
**oemdata
, u64
*oemdata_size
)
111 efi_guid_t guid
= *(efi_guid_t
*)sect_header
;
116 if (efi_guidcmp(guid
, SAL_PLAT_SPECIFIC_ERR_SECT_GUID
) == 0) {
117 sal_log_plat_specific_err_info_t
*psei
= (sal_log_plat_specific_err_info_t
*)sect_header
;
118 valid
= psei
->valid
.oem_data
;
119 } else if (efi_guidcmp(guid
, SAL_PLAT_MEM_DEV_ERR_SECT_GUID
) == 0) {
120 sal_log_mem_dev_err_info_t
*mdei
= (sal_log_mem_dev_err_info_t
*)sect_header
;
121 valid
= mdei
->valid
.oem_data
;
124 return sn_platform_plat_specific_err_print(sect_header
, oemdata
, oemdata_size
);
129 static int __init
sn_salinfo_init(void)
131 salinfo_platform_oemdata
= &sn_salinfo_platform_oemdata
;
135 module_init(sn_salinfo_init
)