linux-kernel - [PATCH] s390/zcrypt: Toleration of new crypto hardware

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Date:	Thu,  2 Oct 2014 14:45:01 +0200
From:	Ingo Tuchscherer <ingo.tuchscherer@...ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heicars2@...ux.vnet.ibm.com>,
	Gerald Schaefer <gerald.schaefer@...ibm.com>,
	Hendrik Brueckner <brueckner@...ibm.com>,
	Harald Freudenberger <freude@...ibm.com>,
	Ingo Tuchscherer <ingo.tuchscherer@...ibm.com>,
	Harald Freudenberger <freude@...ux.vnet.ibm.com>
Subject: [PATCH] s390/zcrypt: Toleration of new crypto hardware

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@...ibm.com>
Signed-off-by: Harald Freudenberger <freude@...ux.vnet.ibm.com>

Index: linux/drivers/s390/crypto/ap_bus.h
===================================================================
--- linux.orig/drivers/s390/crypto/ap_bus.h
+++ linux/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. */
Index: linux/drivers/s390/crypto/ap_bus.c
===================================================================
--- linux.orig/drivers/s390/crypto/ap_bus.c
+++ linux/drivers/s390/crypto/ap_bus.c
@@ -664,6 +664,17 @@ static ssize_t ap_hwtype_show(struct 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, a
 
 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_stru
 				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)

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