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) 2000-2006 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>
13 #include <linux/mutex.h>
16 #include <asm/sn/sn_sal.h>
19 * Interval for calling SAL to poll for errors that do NOT cause error
20 * interrupts. SAL will raise a CPEI if any errors are present that
23 #define CPEI_INTERVAL (5*HZ)
25 struct timer_list sn_cpei_timer;
26 void sn_init_cpei_timer(void);
28 /* Printing oemdata from mca uses data that is not passed through SAL, it is
29 * global. Only one user at a time.
31 static DEFINE_MUTEX(sn_oemdata_mutex);
32 static u8 **sn_oemdata;
33 static u64 *sn_oemdata_size, sn_oemdata_bufsize;
38 * This function is the callback routine that SAL calls to log error
39 * info for platform errors. buf is appended to sn_oemdata, resizing as
41 * Note: this is a SAL to OS callback, running under the same rules as the SAL
42 * code. SAL calls are run with preempt disabled so this routine must not
43 * sleep. vmalloc can sleep so print_hook cannot resize the output buffer
44 * itself, instead it must set the required size and return to let the caller
45 * resize the buffer then redrive the SAL call.
47 static int print_hook(const char *fmt, ...)
53 vsnprintf(buf, sizeof(buf), fmt, args);
56 if (*sn_oemdata_size + len <= sn_oemdata_bufsize)
57 memcpy(*sn_oemdata + *sn_oemdata_size, buf, len);
58 *sn_oemdata_size += len;
62 static void sn_cpei_handler(int irq, void *devid, struct pt_regs *regs)
65 * this function's sole purpose is to call SAL when we receive
66 * a CE interrupt from SHUB or when the timer routine decides
67 * we need to call SAL to check for CEs.
72 ia64_sn_plat_cpei_handler();
75 static void sn_cpei_timer_handler(unsigned long dummy)
77 sn_cpei_handler(-1, NULL, NULL);
78 mod_timer(&sn_cpei_timer, jiffies + CPEI_INTERVAL);
81 void sn_init_cpei_timer(void)
83 init_timer(&sn_cpei_timer);
84 sn_cpei_timer.expires = jiffies + CPEI_INTERVAL;
85 sn_cpei_timer.function = sn_cpei_timer_handler;
86 add_timer(&sn_cpei_timer);
90 sn_platform_plat_specific_err_print(const u8 * sect_header, u8 ** oemdata,
93 mutex_lock(&sn_oemdata_mutex);
95 sn_oemdata_size = oemdata_size;
96 sn_oemdata_bufsize = 0;
97 *sn_oemdata_size = PAGE_SIZE; /* first guess at how much data will be generated */
98 while (*sn_oemdata_size > sn_oemdata_bufsize) {
99 u8 *newbuf = vmalloc(*sn_oemdata_size);
101 printk(KERN_ERR "%s: unable to extend sn_oemdata\n",
106 *sn_oemdata = newbuf;
107 sn_oemdata_bufsize = *sn_oemdata_size;
108 *sn_oemdata_size = 0;
109 ia64_sn_plat_specific_err_print(print_hook, (char *)sect_header);
111 mutex_unlock(&sn_oemdata_mutex);
115 /* Callback when userspace salinfo wants to decode oem data via the platform
116 * kernel and/or prom.
118 int sn_salinfo_platform_oemdata(const u8 *sect_header, u8 **oemdata, u64 *oemdata_size)
120 efi_guid_t guid = *(efi_guid_t *)sect_header;
125 if (efi_guidcmp(guid, SAL_PLAT_SPECIFIC_ERR_SECT_GUID) == 0) {
126 sal_log_plat_specific_err_info_t *psei = (sal_log_plat_specific_err_info_t *)sect_header;
127 valid = psei->valid.oem_data;
128 } else if (efi_guidcmp(guid, SAL_PLAT_MEM_DEV_ERR_SECT_GUID) == 0) {
129 sal_log_mem_dev_err_info_t *mdei = (sal_log_mem_dev_err_info_t *)sect_header;
130 valid = mdei->valid.oem_data;
133 return sn_platform_plat_specific_err_print(sect_header, oemdata, oemdata_size);
138 static int __init sn_salinfo_init(void)
140 if (ia64_platform_is("sn2"))
141 salinfo_platform_oemdata = &sn_salinfo_platform_oemdata;
145 module_init(sn_salinfo_init)