s390/zcrypt: support for extended number of ap domains

Extends the number of ap domains within the zcrypt device driver up to 256.
AP domains in the range 00..255 will be detected.

Signed-off-by: Ingo Tuchscherer <[e-mail]>
Signed-off-by: Martin Schwidefsky <[e-mail]>

drivers/s390/crypto/ap_bus.c

···
 	ap_qid_t qid;
 	int rc, i, j;
 
+	/* IF APXA isn't installed, only 16 domains could be defined */
+	if (!ap_configuration->ap_extended && (ap_domain_index > 15))
+		return -EINVAL;
+
 	/*
 	 * We want to use a single domain. Either the one specified with
 	 * the "domain=" parameter or the domain with the maximum number
···
 {
 	int i, j;
 
-	for (i = 0; i < AP_DOMAINS; i++)
-		for (j = 0; j < AP_DEVICES; j++)
+	for (i = 0; i < AP_DOMAINS; i++) {
+		if (!ap_test_config_domain(i))
+			continue;
+		for (j = 0; j < AP_DEVICES; j++) {
+			if (!ap_test_config_card_id(j))
+				continue;
 			ap_reset_queue(AP_MKQID(j, i));
+		}
+	}
 }
 
 static struct reset_call ap_reset_call = {

drivers/s390/crypto/ap_bus.h

···
 #include <linux/types.h>
 
 #define AP_DEVICES 64		/* Number of AP devices. */
-#define AP_DOMAINS 16		/* Number of AP domains. */
+#define AP_DOMAINS 256		/* Number of AP domains. */
 #define AP_MAX_RESET 90		/* Maximum number of resets. */
 #define AP_RESET_TIMEOUT (HZ*0.7)	/* Time in ticks for reset timeouts. */
 #define AP_CONFIG_TIME 30	/* Time in seconds between AP bus rescans. */
···
  */
 typedef unsigned int ap_qid_t;
 
-#define AP_MKQID(_device,_queue) (((_device) & 63) << 8 | ((_queue) & 15))
+#define AP_MKQID(_device, _queue) (((_device) & 63) << 8 | ((_queue) & 255))
 #define AP_QID_DEVICE(_qid) (((_qid) >> 8) & 63)
-#define AP_QID_QUEUE(_qid) ((_qid) & 15)
+#define AP_QID_QUEUE(_qid) ((_qid) & 255)
 
 /**
  * structy ap_queue_status - Holds the AP queue status.