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path: root/drivers/s390/crypto/ap_queue.c
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Diffstat (limited to 'drivers/s390/crypto/ap_queue.c')
-rw-r--r--drivers/s390/crypto/ap_queue.c85
1 files changed, 72 insertions, 13 deletions
diff --git a/drivers/s390/crypto/ap_queue.c b/drivers/s390/crypto/ap_queue.c
index 2943b2529d..3934a0cc13 100644
--- a/drivers/s390/crypto/ap_queue.c
+++ b/drivers/s390/crypto/ap_queue.c
@@ -33,6 +33,11 @@ static inline bool ap_q_supports_assoc(struct ap_queue *aq)
return ap_test_bit(&aq->card->functions, AP_FUNC_EP11);
}
+static inline bool ap_q_needs_bind(struct ap_queue *aq)
+{
+ return ap_q_supports_bind(aq) && ap_sb_available();
+}
+
/**
* ap_queue_enable_irq(): Enable interrupt support on this AP queue.
* @aq: The AP queue
@@ -195,13 +200,13 @@ static enum ap_sm_wait ap_sm_read(struct ap_queue *aq)
return AP_SM_WAIT_AGAIN;
}
aq->sm_state = AP_SM_STATE_IDLE;
- return AP_SM_WAIT_NONE;
+ break;
case AP_RESPONSE_NO_PENDING_REPLY:
if (aq->queue_count > 0)
- return aq->interrupt ?
+ return status.irq_enabled ?
AP_SM_WAIT_INTERRUPT : AP_SM_WAIT_HIGH_TIMEOUT;
aq->sm_state = AP_SM_STATE_IDLE;
- return AP_SM_WAIT_NONE;
+ break;
default:
aq->dev_state = AP_DEV_STATE_ERROR;
aq->last_err_rc = status.response_code;
@@ -210,6 +215,16 @@ static enum ap_sm_wait ap_sm_read(struct ap_queue *aq)
AP_QID_CARD(aq->qid), AP_QID_QUEUE(aq->qid));
return AP_SM_WAIT_NONE;
}
+ /* Check and maybe enable irq support (again) on this queue */
+ if (!status.irq_enabled && status.queue_empty) {
+ void *lsi_ptr = ap_airq_ptr();
+
+ if (lsi_ptr && ap_queue_enable_irq(aq, lsi_ptr) == 0) {
+ aq->sm_state = AP_SM_STATE_SETIRQ_WAIT;
+ return AP_SM_WAIT_AGAIN;
+ }
+ }
+ return AP_SM_WAIT_NONE;
}
/**
@@ -249,7 +264,7 @@ static enum ap_sm_wait ap_sm_write(struct ap_queue *aq)
fallthrough;
case AP_RESPONSE_Q_FULL:
aq->sm_state = AP_SM_STATE_QUEUE_FULL;
- return aq->interrupt ?
+ return status.irq_enabled ?
AP_SM_WAIT_INTERRUPT : AP_SM_WAIT_HIGH_TIMEOUT;
case AP_RESPONSE_RESET_IN_PROGRESS:
aq->sm_state = AP_SM_STATE_RESET_WAIT;
@@ -302,8 +317,8 @@ static enum ap_sm_wait ap_sm_reset(struct ap_queue *aq)
case AP_RESPONSE_NORMAL:
case AP_RESPONSE_RESET_IN_PROGRESS:
aq->sm_state = AP_SM_STATE_RESET_WAIT;
- aq->interrupt = false;
aq->rapq_fbit = 0;
+ aq->se_bound = false;
return AP_SM_WAIT_LOW_TIMEOUT;
default:
aq->dev_state = AP_DEV_STATE_ERROR;
@@ -377,7 +392,6 @@ static enum ap_sm_wait ap_sm_setirq_wait(struct ap_queue *aq)
if (status.irq_enabled == 1) {
/* Irqs are now enabled */
- aq->interrupt = true;
aq->sm_state = (aq->queue_count > 0) ?
AP_SM_STATE_WORKING : AP_SM_STATE_IDLE;
}
@@ -620,16 +634,21 @@ static ssize_t interrupt_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_queue *aq = to_ap_queue(dev);
+ struct ap_queue_status status;
int rc = 0;
spin_lock_bh(&aq->lock);
- if (aq->sm_state == AP_SM_STATE_SETIRQ_WAIT)
+ if (aq->sm_state == AP_SM_STATE_SETIRQ_WAIT) {
rc = sysfs_emit(buf, "Enable Interrupt pending.\n");
- else if (aq->interrupt)
- rc = sysfs_emit(buf, "Interrupts enabled.\n");
- else
- rc = sysfs_emit(buf, "Interrupts disabled.\n");
+ } else {
+ status = ap_tapq(aq->qid, NULL);
+ if (status.irq_enabled)
+ rc = sysfs_emit(buf, "Interrupts enabled.\n");
+ else
+ rc = sysfs_emit(buf, "Interrupts disabled.\n");
+ }
spin_unlock_bh(&aq->lock);
+
return rc;
}
@@ -868,7 +887,12 @@ static ssize_t se_bind_store(struct device *dev,
}
status = ap_bapq(aq->qid);
spin_unlock_bh(&aq->lock);
- if (status.response_code) {
+ if (!status.response_code) {
+ aq->se_bound = true;
+ AP_DBF_INFO("%s bapq(0x%02x.%04x) success\n", __func__,
+ AP_QID_CARD(aq->qid),
+ AP_QID_QUEUE(aq->qid));
+ } else {
AP_DBF_WARN("%s RC 0x%02x on bapq(0x%02x.%04x)\n",
__func__, status.response_code,
AP_QID_CARD(aq->qid),
@@ -1021,7 +1045,6 @@ struct ap_queue *ap_queue_create(ap_qid_t qid, int device_type)
if (ap_sb_available() && is_prot_virt_guest())
aq->ap_dev.device.groups = ap_queue_dev_sb_attr_groups;
aq->qid = qid;
- aq->interrupt = false;
spin_lock_init(&aq->lock);
INIT_LIST_HEAD(&aq->pendingq);
INIT_LIST_HEAD(&aq->requestq);
@@ -1074,6 +1097,42 @@ int ap_queue_message(struct ap_queue *aq, struct ap_message *ap_msg)
EXPORT_SYMBOL(ap_queue_message);
/**
+ * ap_queue_usable(): Check if queue is usable just now.
+ * @aq: The AP queue device to test for usability.
+ * This function is intended for the scheduler to query if it makes
+ * sense to enqueue a message into this AP queue device by calling
+ * ap_queue_message(). The perspective is very short-term as the
+ * state machine and device state(s) may change at any time.
+ */
+bool ap_queue_usable(struct ap_queue *aq)
+{
+ bool rc = true;
+
+ spin_lock_bh(&aq->lock);
+
+ /* check for not configured or checkstopped */
+ if (!aq->config || aq->chkstop) {
+ rc = false;
+ goto unlock_and_out;
+ }
+
+ /* device state needs to be ok */
+ if (aq->dev_state != AP_DEV_STATE_OPERATING) {
+ rc = false;
+ goto unlock_and_out;
+ }
+
+ /* SE guest's queues additionally need to be bound */
+ if (ap_q_needs_bind(aq) && !aq->se_bound)
+ rc = false;
+
+unlock_and_out:
+ spin_unlock_bh(&aq->lock);
+ return rc;
+}
+EXPORT_SYMBOL(ap_queue_usable);
+
+/**
* ap_cancel_message(): Cancel a crypto request.
* @aq: The AP device that has the message queued
* @ap_msg: The message that is to be removed