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powerpc/powernv: convert codes returned by OPAL calls

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OPAL has its own list of return codes. The patch provides a translation
of such codes in errnos for the opal_sensor_read call, and possibly
others if needed.

Signed-off-by: Cédric Le Goater <clg@fr.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Cédric Le Goater 2015-03-30 12:06:09 +02:00 committed by Michael Ellerman
parent acdb66857f
commit e3c5c2e0bc
3 changed files with 25 additions and 2 deletions
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2
arch/powerpc/include/asm/opal.h
View File

@ -247,6 +247,8 @@ struct opal_sg_list *opal_vmalloc_to_sg_list(void *vmalloc_addr,
unsigned long vmalloc_size);
void opal_free_sg_list(struct opal_sg_list *sg);
extern int opal_error_code(int rc);
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_OPAL_H */

6
arch/powerpc/platforms/powernv/opal-sensor.c
View File

@ -46,8 +46,10 @@ int opal_get_sensor_data(u32 sensor_hndl, u32 *sensor_data)
mutex_lock(&opal_sensor_mutex);
ret = opal_sensor_read(sensor_hndl, token, &data);
if (ret != OPAL_ASYNC_COMPLETION)
if (ret != OPAL_ASYNC_COMPLETION) {
ret = opal_error_code(ret);
goto out_token;
}
ret = opal_async_wait_response(token, &msg);
if (ret) {
@ -57,7 +59,7 @@ int opal_get_sensor_data(u32 sensor_hndl, u32 *sensor_data)
}
*sensor_data = be32_to_cpu(data);
ret = be64_to_cpu(msg.params[1]);
ret = opal_error_code(be64_to_cpu(msg.params[1]));
out_token:
mutex_unlock(&opal_sensor_mutex);

19
arch/powerpc/platforms/powernv/opal.c
View File

@ -931,6 +931,25 @@ void opal_free_sg_list(struct opal_sg_list *sg)
}
}
int opal_error_code(int rc)
{
switch (rc) {
case OPAL_SUCCESS: return 0;
case OPAL_PARAMETER: return -EINVAL;
case OPAL_ASYNC_COMPLETION: return -EINPROGRESS;
case OPAL_BUSY_EVENT: return -EBUSY;
case OPAL_NO_MEM: return -ENOMEM;
case OPAL_UNSUPPORTED: return -EIO;
case OPAL_HARDWARE: return -EIO;
case OPAL_INTERNAL_ERROR: return -EIO;
default:
pr_err("%s: unexpected OPAL error %d\n", __func__, rc);
return -EIO;
}
}
EXPORT_SYMBOL_GPL(opal_poll_events);
EXPORT_SYMBOL_GPL(opal_rtc_read);
EXPORT_SYMBOL_GPL(opal_rtc_write);