s390/ap: add card/queue deconfig state

This patch adds a new config state to the ap card and queue
devices. This state reflects the response code
0x03 "AP deconfigured" on TQAP invocation and is tracked with
every ap bus scan.

Together with this new state now a card/queue device which
is 'deconfigured' is not disposed any more. However, for backward
compatibility the online state now needs to take this state into
account. So a card/queue is offline when the device is not configured.
Furthermore a device can't get switched from offline to online state
when not configured.

The config state is shown in sysfs at
  /sys/devices/ap/cardxx/config
for the card and
  /sys/devices/ap/cardxx/xx.yyyy/config
for each queue within each card.
It is a read-only attribute reflecting the negation of the
'AP deconfig' state as it is noted in the AP documents.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

1 files changed, 28 insertions, 18 deletions

diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c
index 223e1c233278..ab18e847cee7 100644
--- a/drivers/s390/crypto/zcrypt_api.c
+++ b/drivers/s390/crypto/zcrypt_api.c
@@ -663,8 +663,9 @@ static long zcrypt_rsa_modexpo(struct ap_perms *perms,
 	pref_zq = NULL;
 	spin_lock(&zcrypt_list_lock);
 	for_each_zcrypt_card(zc) {
-		/* Check for online accelarator and CCA cards */
-		if (!zc->online || !(zc->card->functions & 0x18000000))
+		/* Check for useable accelarator or CCA card */
+		if (!zc->online || !zc->card->config ||
+		    !(zc->card->functions & 0x18000000))
 			continue;
 		/* Check for size limits */
 		if (zc->min_mod_size > mex->inputdatalength ||
@@ -682,8 +683,9 @@ static long zcrypt_rsa_modexpo(struct ap_perms *perms,
 		if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 			continue;
 		for_each_zcrypt_queue(zq, zc) {
-			/* check if device is online and eligible */
-			if (!zq->online || !zq->ops->rsa_modexpo)
+			/* check if device is useable and eligible */
+			if (!zq->online || !zq->ops->rsa_modexpo ||
+			    !zq->queue->config)
 				continue;
 			/* check if device node has admission for this queue */
 			if (!zcrypt_check_queue(perms,
@@ -760,8 +762,9 @@ static long zcrypt_rsa_crt(struct ap_perms *perms,
 	pref_zq = NULL;
 	spin_lock(&zcrypt_list_lock);
 	for_each_zcrypt_card(zc) {
-		/* Check for online accelarator and CCA cards */
-		if (!zc->online || !(zc->card->functions & 0x18000000))
+		/* Check for useable accelarator or CCA card */
+		if (!zc->online || !zc->card->config ||
+		    !(zc->card->functions & 0x18000000))
 			continue;
 		/* Check for size limits */
 		if (zc->min_mod_size > crt->inputdatalength ||
@@ -779,8 +782,9 @@ static long zcrypt_rsa_crt(struct ap_perms *perms,
 		if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 			continue;
 		for_each_zcrypt_queue(zq, zc) {
-			/* check if device is online and eligible */
-			if (!zq->online || !zq->ops->rsa_modexpo_crt)
+			/* check if device is useable and eligible */
+			if (!zq->online || !zq->ops->rsa_modexpo_crt ||
+			    !zq->queue->config)
 				continue;
 			/* check if device node has admission for this queue */
 			if (!zcrypt_check_queue(perms,
@@ -859,8 +863,9 @@ static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
 	pref_zq = NULL;
 	spin_lock(&zcrypt_list_lock);
 	for_each_zcrypt_card(zc) {
-		/* Check for online CCA cards */
-		if (!zc->online || !(zc->card->functions & 0x10000000))
+		/* Check for useable CCA card */
+		if (!zc->online || !zc->card->config ||
+		    !(zc->card->functions & 0x10000000))
 			continue;
 		/* Check for user selected CCA card */
 		if (xcRB->user_defined != AUTOSELECT &&
@@ -878,9 +883,10 @@ static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
 		if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 			continue;
 		for_each_zcrypt_queue(zq, zc) {
-			/* check if device is online and eligible */
+			/* check for device useable and eligible */
 			if (!zq->online ||
 			    !zq->ops->send_cprb ||
+			    !zq->queue->config ||
 			    (tdom != AUTOSEL_DOM &&
 			     tdom != AP_QID_QUEUE(zq->queue->qid)))
 				continue;
@@ -1012,8 +1018,9 @@ static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
 	pref_zq = NULL;
 	spin_lock(&zcrypt_list_lock);
 	for_each_zcrypt_card(zc) {
-		/* Check for online EP11 cards */
-		if (!zc->online || !(zc->card->functions & 0x04000000))
+		/* Check for useable EP11 card */
+		if (!zc->online || !zc->card->config ||
+		    !(zc->card->functions & 0x04000000))
 			continue;
 		/* Check for user selected EP11 card */
 		if (targets &&
@@ -1031,9 +1038,10 @@ static long _zcrypt_send_ep11_cprb(bool userspace, struct ap_perms *perms,
 		if (!zcrypt_card_compare(zc, pref_zc, wgt + cpen, pref_wgt))
 			continue;
 		for_each_zcrypt_queue(zq, zc) {
-			/* check if device is online and eligible */
+			/* check if device is useable and eligible */
 			if (!zq->online ||
 			    !zq->ops->send_ep11_cprb ||
+			    !zq->queue->config ||
 			    (targets &&
 			     !is_desired_ep11_queue(zq->queue->qid,
 						    target_num, targets)))
@@ -1110,16 +1118,18 @@ static long zcrypt_rng(char *buffer)
 	pref_zq = NULL;
 	spin_lock(&zcrypt_list_lock);
 	for_each_zcrypt_card(zc) {
-		/* Check for online CCA cards */
-		if (!zc->online || !(zc->card->functions & 0x10000000))
+		/* Check for useable CCA card */
+		if (!zc->online || !zc->card->config ||
+		    !(zc->card->functions & 0x10000000))
 			continue;
 		/* get weight index of the card device	*/
 		wgt = zc->speed_rating[func_code];
 		if (!zcrypt_card_compare(zc, pref_zc, wgt, pref_wgt))
 			continue;
 		for_each_zcrypt_queue(zq, zc) {
-			/* check if device is online and eligible */
-			if (!zq->online || !zq->ops->rng)
+			/* check if device is useable and eligible */
+			if (!zq->online || !zq->ops->rng ||
+			    !zq->queue->config)
 				continue;
 			if (!zcrypt_queue_compare(zq, pref_zq, wgt, pref_wgt))
 				continue;