From: Nathan Fontenot <nfont@austin.ibm.com>
Add log_rtas_error(), to be called in the event that a rtas call
returns a hardware error (-1) so we can log additional information
about the hardware error.
---
arch/ppc64/kernel/rtas.c | 39 +++++++++++++++++++++++++++++++++++++++
1 files changed, 39 insertions(+)
diff -puN arch/ppc64/kernel/rtas.c~ppc64-log-rtas-error arch/ppc64/kernel/rtas.c
--- 25/arch/ppc64/kernel/rtas.c~ppc64-log-rtas-error 2004-02-21 20:58:17.000000000 -0800
+++ 25-akpm/arch/ppc64/kernel/rtas.c 2004-02-21 20:58:17.000000000 -0800
@@ -59,6 +59,8 @@ struct rtas_t rtas = {
.lock = SPIN_LOCK_UNLOCKED
};
+char rtas_err_buf[RTAS_ERROR_LOG_MAX];
+
extern unsigned long reloc_offset(void);
spinlock_t rtas_data_buf_lock = SPIN_LOCK_UNLOCKED;
@@ -126,6 +128,34 @@ rtas_token(const char *service)
return tokp ? *tokp : RTAS_UNKNOWN_SERVICE;
}
+void
+log_rtas_error(struct rtas_args *rtas_args)
+{
+ struct rtas_args err_args;
+
+ err_args.token = rtas_token("rtas-last-error");
+ err_args.nargs = 2;
+ err_args.nret = 1;
+ err_args.rets = (rtas_arg_t *)&(err_args.args[2]);
+
+ err_args.args[0] = (rtas_arg_t)__pa(rtas_err_buf);
+ err_args.args[1] = RTAS_ERROR_LOG_MAX;
+ err_args.args[2] = 0;
+
+ get_paca()->xRtas = err_args;
+
+ PPCDBG(PPCDBG_RTAS, "\tentering rtas with 0x%lx\n",
+ (void *)__pa((unsigned long)&err_args));
+ enter_rtas((void *)__pa((unsigned long)&get_paca()->xRtas));
+ PPCDBG(PPCDBG_RTAS, "\treturned from rtas ...\n");
+
+ err_args = get_paca()->xRtas;
+ get_paca()->xRtas = *rtas_args;
+
+ if (err_args.rets[0] == 0)
+ log_error(rtas_err_buf, ERR_TYPE_RTAS_LOG, 0);
+}
+
long
rtas_call(int token, int nargs, int nret,
unsigned long *outputs, ...)
@@ -166,6 +196,10 @@ rtas_call(int token, int nargs, int nret
(void *)__pa((unsigned long)rtas_args));
enter_rtas((void *)__pa((unsigned long)rtas_args));
PPCDBG(PPCDBG_RTAS, "\treturned from rtas ...\n");
+
+ if (rtas_args->rets[0] == -1)
+ log_rtas_error(rtas_args);
+
#if 0 /* Gotta do something different here, use global lock for now... */
spin_unlock_irqrestore(&rtas_args->lock, s);
#else
@@ -410,9 +444,14 @@ asmlinkage int ppc_rtas(struct rtas_args
return -EFAULT;
spin_lock_irqsave(&rtas.lock, flags);
+
get_paca()->xRtas = args;
enter_rtas((void *)__pa((unsigned long)&get_paca()->xRtas));
args = get_paca()->xRtas;
+
+ if (args.rets[0] == -1)
+ log_rtas_error(&args);
+
spin_unlock_irqrestore(&rtas.lock, flags);
/* Copy out args. */
_