s390/zcrypt: Toleration of new crypto hardware

The zcrypt device driver will accept the new crypto adapter
in toleration mode. A new sysfs attribute 'raw_hwtype' will
expose the raw hardware type.

Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@de.ibm.com>
Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>

2 files changed, 17 insertions, 0 deletions

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 51e6aa0e2e58..99485415dcc2 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -664,6 +664,17 @@ static ssize_t ap_hwtype_show(struct device *dev,
 }
 
 static DEVICE_ATTR(hwtype, 0444, ap_hwtype_show, NULL);
+
+static ssize_t ap_raw_hwtype_show(struct device *dev,
+                              struct device_attribute *attr, char *buf)
+{
+        struct ap_device *ap_dev = to_ap_dev(dev);
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->raw_hwtype);
+}
+
+static DEVICE_ATTR(raw_hwtype, 0444, ap_raw_hwtype_show, NULL);
+
 static ssize_t ap_depth_show(struct device *dev, struct device_attribute *attr,
                              char *buf)
 {
@@ -734,6 +745,7 @@ static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL);
 
 static struct attribute *ap_dev_attrs[] = {
         &dev_attr_hwtype.attr,
+        &dev_attr_raw_hwtype.attr,
         &dev_attr_depth.attr,
         &dev_attr_request_count.attr,
         &dev_attr_requestq_count.attr,
@@ -1417,9 +1429,13 @@ static void ap_scan_bus(struct work_struct *unused)
                                 continue;
                         }
                         break;
+                case 11:
+                        ap_dev->device_type = 10;
+                        break;
                 default:
                         ap_dev->device_type = device_type;
                 }
+                ap_dev->raw_hwtype = device_type;
 
                 rc = ap_query_functions(qid, &device_functions);
                 if (!rc)
diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h
index db92e9fa5c07..055a0f956d17 100644
--- a/drivers/s390/crypto/ap_bus.h
+++ b/drivers/s390/crypto/ap_bus.h
@@ -161,6 +161,7 @@ struct ap_device {
         ap_qid_t qid;                   /* AP queue id. */
         int queue_depth;                /* AP queue depth.*/
         int device_type;                /* AP device type. */
+        int raw_hwtype;                 /* AP raw hardware type. */
         unsigned int functions;         /* AP device function bitfield. */
         int unregistered;               /* marks AP device as unregistered */
         struct timer_list timeout;      /* Timer for request timeouts. */