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powerpc/powernv: Fix OPAL_CONSOLE_FLUSH prototype and usages 

The recently added OPAL API call, OPAL_CONSOLE_FLUSH, originally took no
parameters and returned nothing.  The call was updated to accept the
terminal number to flush, and returned various values depending on the
state of the output buffer.

The prototype has been updated and its usage in the OPAL kmsg dumper has
been modified to support its new behaviour as an incremental flush.

Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Russell Currey 2016-01-13 12:04:32 +11:00 committed by Michael Ellerman
parent 2f10f1a788
commit c88c5d4373
2 changed files with 9 additions and 2 deletions
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2
arch/powerpc/include/asm/opal.h
View File

@ -35,7 +35,7 @@ int64_t opal_console_read(int64_t term_number, __be64 *length,
uint8_t *buffer);
int64_t opal_console_write_buffer_space(int64_t term_number,
__be64 *length);
void opal_console_flush(void);
int64_t opal_console_flush(int64_t term_number);
int64_t opal_rtc_read(__be32 *year_month_day,
__be64 *hour_minute_second_millisecond);
int64_t opal_rtc_write(uint32_t year_month_day,

9
arch/powerpc/platforms/powernv/opal-kmsg.c
View File

@ -27,6 +27,7 @@ static void force_opal_console_flush(struct kmsg_dumper *dumper,
enum kmsg_dump_reason reason)
{
int i;
int64_t ret;
/*
* Outside of a panic context the pollers will continue to run,
@ -36,7 +37,13 @@ static void force_opal_console_flush(struct kmsg_dumper *dumper,
return;
if (opal_check_token(OPAL_CONSOLE_FLUSH)) {
opal_console_flush();
ret = opal_console_flush(0);
if (ret == OPAL_UNSUPPORTED || ret == OPAL_PARAMETER)
return;
/* Incrementally flush until there's nothing left */
while (opal_console_flush(0) != OPAL_SUCCESS);
} else {
/*
* If OPAL_CONSOLE_FLUSH is not implemented in the firmware,