Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-16 00:52:01 +00:00
Code Issues Packages Projects Releases Wiki Activity

[S390] qdio: move ACK to newest buffer for devices without QEBSM

Browse Source 
The ACKnowledgement state should be set on the newest SBAL so an
adapter interrupt surpression check needs to scan fewer SBALs.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Jan Glauber 2009-03-26 15:24:28 +01:00 committed by Martin Schwidefsky
parent 700e982f28
commit 3fdf1e18cb
1 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/s390/cio/qdio_main.c
View File

@ -440,12 +440,16 @@ static inline void inbound_primed(struct qdio_q *q, int count)
/* reset the previous ACK but first set the new one */
set_buf_state(q, new, SLSB_P_INPUT_ACK);
set_buf_state(q, q->last_move_ftc, SLSB_P_INPUT_NOT_INIT);
}
else {
} else {
q->u.in.polling = 1;
set_buf_state(q, q->first_to_check, SLSB_P_INPUT_ACK);
set_buf_state(q, new, SLSB_P_INPUT_ACK);
}
/*
* last_move_ftc points to the ACK'ed buffer and not to the last turns
* first_to_check like for qebsm. Since it is only used to check if
* the queue front moved in qdio_inbound_q_done this is not a problem.
*/
q->last_move_ftc = new;
count--;
if (!count)
@ -455,7 +459,7 @@ static inline void inbound_primed(struct qdio_q *q, int count)
* Need to change all PRIMED buffers to NOT_INIT, otherwise
* we're loosing initiative in the thinint code.
*/
set_buf_states(q, next_buf(q->first_to_check), SLSB_P_INPUT_NOT_INIT,
set_buf_states(q, q->first_to_check, SLSB_P_INPUT_NOT_INIT,
count);
}
@ -1480,7 +1484,6 @@ static void handle_inbound(struct qdio_q *q, unsigned int callflags,
if (q->u.in.ack_count <= 0) {
q->u.in.polling = 0;
q->u.in.ack_count = 0;
/* TODO: must we set last_move_ftc to something meaningful? */
goto set;
}
q->last_move_ftc = add_buf(q->last_move_ftc, diff);