diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/misc/sgi-gru/gru_instructions.h | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/drivers/misc/sgi-gru/gru_instructions.h b/drivers/misc/sgi-gru/gru_instructions.h index eb9140d32e6..3c9c06618e6 100644 --- a/drivers/misc/sgi-gru/gru_instructions.h +++ b/drivers/misc/sgi-gru/gru_instructions.h @@ -623,9 +623,11 @@ static inline int gru_get_cb_substatus(void *cb) return cbs->isubstatus; } -/* Check the status of a CB. If the CB is in UPM mode, call the - * OS to handle the UPM status. - * Returns the CB status field value (0 for normal completion) +/* + * User interface to check an instruction status. UPM and exceptions + * are handled automatically. However, this function does NOT wait + * for an active instruction to complete. + * */ static inline int gru_check_status(void *cb) { @@ -633,34 +635,31 @@ static inline int gru_check_status(void *cb) int ret; ret = cbs->istatus; - if (ret == CBS_CALL_OS) + if (ret != CBS_ACTIVE) ret = gru_check_status_proc(cb); return ret; } -/* Wait for CB to complete. - * Returns the CB status field value (0 for normal completion) +/* + * User interface (via inline function) to wait for an instruction + * to complete. Completion status (IDLE or EXCEPTION is returned + * to the user. Exception due to hardware errors are automatically + * retried before returning an exception. + * */ static inline int gru_wait(void *cb) { - struct gru_control_block_status *cbs = (void *)cb; - int ret = cbs->istatus; - - if (ret != CBS_IDLE) - ret = gru_wait_proc(cb); - return ret; + return gru_wait_proc(cb); } -/* Wait for CB to complete. Aborts program if error. (Note: error does NOT +/* + * Wait for CB to complete. Aborts program if error. (Note: error does NOT * mean TLB mis - only fatal errors such as memory parity error or user * bugs will cause termination. */ static inline void gru_wait_abort(void *cb) { - struct gru_control_block_status *cbs = (void *)cb; - - if (cbs->istatus != CBS_IDLE) - gru_wait_abort_proc(cb); + gru_wait_abort_proc(cb); } |