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s390/vfio-ap: handle queue state change in progress on reset 

A new APQSW response code (0xA) indicating the designated queue is in the
process of being bound or associated to a configuration may be returned
from the PQAP(ZAPQ) command. This patch introduces code that will verify
when the PQAP(ZAPQ) command can be re-issued after receiving response code
0xA.

Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Tested-by: Viktor Mihajlovski <mihajlov@linux.ibm.com>
Link: https://lore.kernel.org/r/20230815184333.6554-9-akrowiak@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Tony Krowiak 2023-08-15 14:43:29 -04:00 committed by Heiko Carstens
parent 9261f04388
commit e1f17f8ea9
1 changed files with 3 additions and 1 deletions
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4
drivers/s390/crypto/vfio_ap_ops.c
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@ -1647,7 +1647,8 @@ static void apq_reset_check(struct work_struct *reset_work)
status.irq_enabled);
} else {
if (q->reset_status.response_code == AP_RESPONSE_RESET_IN_PROGRESS ||
q->reset_status.response_code == AP_RESPONSE_BUSY) {
q->reset_status.response_code == AP_RESPONSE_BUSY ||
q->reset_status.response_code == AP_RESPONSE_STATE_CHANGE_IN_PROGRESS) {
status = ap_zapq(q->apqn, 0);
memcpy(&q->reset_status, &status, sizeof(status));
continue;
@ -1679,6 +1680,7 @@ static void vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q)
case AP_RESPONSE_NORMAL:
case AP_RESPONSE_RESET_IN_PROGRESS:
case AP_RESPONSE_BUSY:
case AP_RESPONSE_STATE_CHANGE_IN_PROGRESS:
/*
* Let's verify whether the ZAPQ completed successfully on a work queue.
*/