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authorJack Steiner <steiner@sgi.com>2009-06-17 16:28:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-18 13:04:03 -0700
commit9f2501142bd3c496afa7efdf18583aab56fe3134 (patch)
treec805d705289c0dbfcb6aee9f15313f0a46340f7f /drivers/misc
parent6471cd4d6c2526f3df693895a6bfa70353fad3f7 (diff)
downloadop-kernel-dev-9f2501142bd3c496afa7efdf18583aab56fe3134.zip
op-kernel-dev-9f2501142bd3c496afa7efdf18583aab56fe3134.tar.gz
gru: cleanup gru inline functions
Cleanup of GRU inline functions to eliminate unnecessary inline code. Update function descriptions. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/sgi-gru/gru_instructions.h33
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 eb9140d..3c9c066 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);
}
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