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-rw-r--r--arch/s390/include/asm/ap.h64
-rw-r--r--drivers/s390/crypto/ap_bus.c28
-rw-r--r--drivers/s390/crypto/ap_bus.h36
-rw-r--r--drivers/s390/crypto/ap_queue.c2
4 files changed, 88 insertions, 42 deletions
diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h
new file mode 100644
index 000000000000..0f3e6f38db55
--- /dev/null
+++ b/arch/s390/include/asm/ap.h
@@ -0,0 +1,64 @@
+/*
+ * Adjunct processor (AP) interfaces
+ *
+ * Copyright IBM Corp. 2017
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2 only)
+ * as published by the Free Software Foundation.
+ *
+ * Author(s): Tony Krowiak <akrowia@linux.vnet.ibm.com>
+ * Martin Schwidefsky <schwidefsky@de.ibm.com>
+ * Harald Freudenberger <freude@de.ibm.com>
+ */
+
+#ifndef _ASM_S390_AP_H_
+#define _ASM_S390_AP_H_
+
+/**
+ * The ap_qid_t identifier of an ap queue.
+ * If the AP facilities test (APFT) facility is available,
+ * card and queue index are 8 bit values, otherwise
+ * card index is 6 bit and queue index a 4 bit value.
+ */
+typedef unsigned int ap_qid_t;
+
+#define AP_MKQID(_card, _queue) (((_card) & 63) << 8 | ((_queue) & 255))
+#define AP_QID_CARD(_qid) (((_qid) >> 8) & 63)
+#define AP_QID_QUEUE(_qid) ((_qid) & 255)
+
+/**
+ * struct ap_queue_status - Holds the AP queue status.
+ * @queue_empty: Shows if queue is empty
+ * @replies_waiting: Waiting replies
+ * @queue_full: Is 1 if the queue is full
+ * @irq_enabled: Shows if interrupts are enabled for the AP
+ * @response_code: Holds the 8 bit response code
+ *
+ * The ap queue status word is returned by all three AP functions
+ * (PQAP, NQAP and DQAP). There's a set of flags in the first
+ * byte, followed by a 1 byte response code.
+ */
+struct ap_queue_status {
+ unsigned int queue_empty : 1;
+ unsigned int replies_waiting : 1;
+ unsigned int queue_full : 1;
+ unsigned int _pad1 : 4;
+ unsigned int irq_enabled : 1;
+ unsigned int response_code : 8;
+ unsigned int _pad2 : 16;
+};
+
+/**
+ * ap_test_queue(): Test adjunct processor queue.
+ * @qid: The AP queue number
+ * @tbit: Test facilities bit
+ * @info: Pointer to queue descriptor
+ *
+ * Returns AP queue status structure.
+ */
+struct ap_queue_status ap_test_queue(ap_qid_t qid,
+ int tbit,
+ unsigned long *info);
+
+#endif /* _ASM_S390_AP_H_ */
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 6dee598979e7..4fcfa8d4e0b5 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -166,19 +166,33 @@ static int ap_configuration_available(void)
}
/**
+ * ap_apft_available(): Test if AP facilities test (APFT)
+ * facility is available.
+ *
+ * Returns 1 if APFT is is available.
+ */
+static int ap_apft_available(void)
+{
+ return test_facility(15);
+}
+
+/**
* ap_test_queue(): Test adjunct processor queue.
* @qid: The AP queue number
+ * @tbit: Test facilities bit
* @info: Pointer to queue descriptor
*
* Returns AP queue status structure.
*/
-static inline struct ap_queue_status
-ap_test_queue(ap_qid_t qid, unsigned long *info)
+struct ap_queue_status ap_test_queue(ap_qid_t qid,
+ int tbit,
+ unsigned long *info)
{
- if (test_facility(15))
- qid |= 1UL << 23; /* set APFT T bit*/
+ if (tbit)
+ qid |= 1UL << 23; /* set T bit*/
return ap_tapq(qid, info);
}
+EXPORT_SYMBOL(ap_test_queue);
static inline int ap_query_configuration(void)
{
@@ -261,7 +275,7 @@ static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type,
if (!ap_test_config_card_id(AP_QID_CARD(qid)))
return -ENODEV;
- status = ap_test_queue(qid, &info);
+ status = ap_test_queue(qid, ap_apft_available(), &info);
switch (status.response_code) {
case AP_RESPONSE_NORMAL:
*queue_depth = (int)(info & 0xff);
@@ -940,7 +954,9 @@ static int ap_select_domain(void)
for (j = 0; j < AP_DEVICES; j++) {
if (!ap_test_config_card_id(j))
continue;
- status = ap_test_queue(AP_MKQID(j, i), NULL);
+ status = ap_test_queue(AP_MKQID(j, i),
+ ap_apft_available(),
+ NULL);
if (status.response_code != AP_RESPONSE_NORMAL)
continue;
count++;
diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
index 4dc7c88fb054..f07698d41f77 100644
--- a/drivers/s390/crypto/ap_bus.h
+++ b/drivers/s390/crypto/ap_bus.h
@@ -28,6 +28,7 @@
#include <linux/device.h>
#include <linux/types.h>
+#include <asm/ap.h>
#define AP_DEVICES 64 /* Number of AP devices. */
#define AP_DOMAINS 256 /* Number of AP domains. */
@@ -40,41 +41,6 @@ extern int ap_domain_index;
extern spinlock_t ap_list_lock;
extern struct list_head ap_card_list;
-/**
- * The ap_qid_t identifier of an ap queue. It contains a
- * 6 bit card index and a 4 bit queue index (domain).
- */
-typedef unsigned int ap_qid_t;
-
-#define AP_MKQID(_card, _queue) (((_card) & 63) << 8 | ((_queue) & 255))
-#define AP_QID_CARD(_qid) (((_qid) >> 8) & 63)
-#define AP_QID_QUEUE(_qid) ((_qid) & 255)
-
-/**
- * structy ap_queue_status - Holds the AP queue status.
- * @queue_empty: Shows if queue is empty
- * @replies_waiting: Waiting replies
- * @queue_full: Is 1 if the queue is full
- * @pad: A 4 bit pad
- * @int_enabled: Shows if interrupts are enabled for the AP
- * @response_code: Holds the 8 bit response code
- * @pad2: A 16 bit pad
- *
- * The ap queue status word is returned by all three AP functions
- * (PQAP, NQAP and DQAP). There's a set of flags in the first
- * byte, followed by a 1 byte response code.
- */
-struct ap_queue_status {
- unsigned int queue_empty : 1;
- unsigned int replies_waiting : 1;
- unsigned int queue_full : 1;
- unsigned int pad1 : 4;
- unsigned int int_enabled : 1;
- unsigned int response_code : 8;
- unsigned int pad2 : 16;
-} __packed;
-
-
static inline int ap_test_bit(unsigned int *ptr, unsigned int nr)
{
return (*ptr & (0x80000000u >> nr)) != 0;
diff --git a/drivers/s390/crypto/ap_queue.c b/drivers/s390/crypto/ap_queue.c
index 0f1a5d02acb0..c906fb73a215 100644
--- a/drivers/s390/crypto/ap_queue.c
+++ b/drivers/s390/crypto/ap_queue.c
@@ -362,7 +362,7 @@ static enum ap_wait ap_sm_setirq_wait(struct ap_queue *aq)
/* Get the status with TAPQ */
status = ap_tapq(aq->qid, NULL);
- if (status.int_enabled == 1) {
+ if (status.irq_enabled == 1) {
/* Irqs are now enabled */
aq->interrupt = AP_INTR_ENABLED;
aq->state = (aq->queue_count > 0) ?

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