Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/types.h> |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/timer.h> |
| 12 | #include <linux/vmalloc.h> |
| 13 | #include <asm/mca.h> |
| 14 | #include <asm/sal.h> |
| 15 | #include <asm/sn/sn_sal.h> |
| 16 | |
| 17 | /* |
| 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 |
| 20 | * need to be logged. |
| 21 | */ |
| 22 | #define CPEI_INTERVAL (5*HZ) |
| 23 | |
| 24 | struct timer_list sn_cpei_timer; |
| 25 | void sn_init_cpei_timer(void); |
| 26 | |
| 27 | /* Printing oemdata from mca uses data that is not passed through SAL, it is |
| 28 | * global. Only one user at a time. |
| 29 | */ |
| 30 | static DECLARE_MUTEX(sn_oemdata_mutex); |
| 31 | static u8 **sn_oemdata; |
| 32 | static u64 *sn_oemdata_size, sn_oemdata_bufsize; |
| 33 | |
| 34 | /* |
| 35 | * print_hook |
| 36 | * |
| 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 |
| 39 | * required. |
Keith Owens | 32709d8 | 2005-04-08 14:23:00 -0700 | [diff] [blame^] | 40 | * Note: this is a SAL to OS callback, running under the same rules as the SAL |
| 41 | * code. SAL calls are run with preempt disabled so this routine must not |
| 42 | * sleep. vmalloc can sleep so print_hook cannot resize the output buffer |
| 43 | * itself, instead it must set the required size and return to let the caller |
| 44 | * resize the buffer then redrive the SAL call. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | */ |
| 46 | static int print_hook(const char *fmt, ...) |
| 47 | { |
| 48 | char buf[400]; |
| 49 | int len; |
| 50 | va_list args; |
| 51 | va_start(args, fmt); |
| 52 | vsnprintf(buf, sizeof(buf), fmt, args); |
| 53 | va_end(args); |
| 54 | len = strlen(buf); |
Keith Owens | 32709d8 | 2005-04-08 14:23:00 -0700 | [diff] [blame^] | 55 | if (*sn_oemdata_size + len <= sn_oemdata_bufsize) |
| 56 | memcpy(*sn_oemdata + *sn_oemdata_size, buf, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | *sn_oemdata_size += len; |
| 58 | return 0; |
| 59 | } |
| 60 | |
| 61 | static void sn_cpei_handler(int irq, void *devid, struct pt_regs *regs) |
| 62 | { |
| 63 | /* |
| 64 | * this function's sole purpose is to call SAL when we receive |
| 65 | * a CE interrupt from SHUB or when the timer routine decides |
| 66 | * we need to call SAL to check for CEs. |
| 67 | */ |
| 68 | |
| 69 | /* CALL SAL_LOG_CE */ |
| 70 | |
| 71 | ia64_sn_plat_cpei_handler(); |
| 72 | } |
| 73 | |
| 74 | static void sn_cpei_timer_handler(unsigned long dummy) |
| 75 | { |
| 76 | sn_cpei_handler(-1, NULL, NULL); |
| 77 | mod_timer(&sn_cpei_timer, jiffies + CPEI_INTERVAL); |
| 78 | } |
| 79 | |
| 80 | void sn_init_cpei_timer(void) |
| 81 | { |
| 82 | init_timer(&sn_cpei_timer); |
| 83 | sn_cpei_timer.expires = jiffies + CPEI_INTERVAL; |
| 84 | sn_cpei_timer.function = sn_cpei_timer_handler; |
| 85 | add_timer(&sn_cpei_timer); |
| 86 | } |
| 87 | |
| 88 | static int |
| 89 | sn_platform_plat_specific_err_print(const u8 * sect_header, u8 ** oemdata, |
| 90 | u64 * oemdata_size) |
| 91 | { |
| 92 | down(&sn_oemdata_mutex); |
| 93 | sn_oemdata = oemdata; |
| 94 | sn_oemdata_size = oemdata_size; |
| 95 | sn_oemdata_bufsize = 0; |
Keith Owens | 32709d8 | 2005-04-08 14:23:00 -0700 | [diff] [blame^] | 96 | *sn_oemdata_size = PAGE_SIZE; /* first guess at how much data will be generated */ |
| 97 | while (*sn_oemdata_size > sn_oemdata_bufsize) { |
| 98 | u8 *newbuf = vmalloc(*sn_oemdata_size); |
| 99 | if (!newbuf) { |
| 100 | printk(KERN_ERR "%s: unable to extend sn_oemdata\n", |
| 101 | __FUNCTION__); |
| 102 | return 1; |
| 103 | } |
| 104 | vfree(*sn_oemdata); |
| 105 | *sn_oemdata = newbuf; |
| 106 | sn_oemdata_bufsize = *sn_oemdata_size; |
| 107 | *sn_oemdata_size = 0; |
| 108 | ia64_sn_plat_specific_err_print(print_hook, (char *)sect_header); |
| 109 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | up(&sn_oemdata_mutex); |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | /* Callback when userspace salinfo wants to decode oem data via the platform |
| 115 | * kernel and/or prom. |
| 116 | */ |
| 117 | int sn_salinfo_platform_oemdata(const u8 *sect_header, u8 **oemdata, u64 *oemdata_size) |
| 118 | { |
| 119 | efi_guid_t guid = *(efi_guid_t *)sect_header; |
| 120 | int valid = 0; |
| 121 | *oemdata_size = 0; |
| 122 | vfree(*oemdata); |
| 123 | *oemdata = NULL; |
| 124 | if (efi_guidcmp(guid, SAL_PLAT_SPECIFIC_ERR_SECT_GUID) == 0) { |
| 125 | sal_log_plat_specific_err_info_t *psei = (sal_log_plat_specific_err_info_t *)sect_header; |
| 126 | valid = psei->valid.oem_data; |
| 127 | } else if (efi_guidcmp(guid, SAL_PLAT_MEM_DEV_ERR_SECT_GUID) == 0) { |
| 128 | sal_log_mem_dev_err_info_t *mdei = (sal_log_mem_dev_err_info_t *)sect_header; |
| 129 | valid = mdei->valid.oem_data; |
| 130 | } |
| 131 | if (valid) |
| 132 | return sn_platform_plat_specific_err_print(sect_header, oemdata, oemdata_size); |
| 133 | else |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | static int __init sn_salinfo_init(void) |
| 138 | { |
| 139 | salinfo_platform_oemdata = &sn_salinfo_platform_oemdata; |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | module_init(sn_salinfo_init) |