s390/ap: Support AP card SCLP config and deconfig operations (5caa2af9) · Commits · 戴 / test

Support SCLP AP adapter config and deconfig operations: The sysfs deconfig attribute /sys/devices/ap/cardxx/deconfig for each AP card is now read-write. Writing in a '1' triggers a synchronous SCLP request to configure the adapter, writing in a '0' sends a synchronous SCLP deconfigure request. Signed-off-by:

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

Vasily Gorbik <gor@linux.ibm.com>

drivers/s390/crypto/ap_card.c

+24 −1

Original line number	Diff line number	Diff line
		@@ -12,6 +12,7 @@
		#include <linux/init.h>
		#include <linux/slab.h>
		#include <asm/facility.h>
		#include <asm/sclp.h>

		#include "ap_bus.h"

		@@ -147,7 +148,29 @@ static ssize_t config_show(struct device *dev,
		return scnprintf(buf, PAGE_SIZE, "%d\n", ac->config ? 1 : 0);
		}

		static DEVICE_ATTR_RO(config);
		static ssize_t config_store(struct device *dev,
		struct device_attribute *attr,
		const char *buf, size_t count)
		{
		int rc = 0, cfg;
		struct ap_card *ac = to_ap_card(dev);

		if (sscanf(buf, "%d\n", &cfg) != 1 \|\| cfg < 0 \|\| cfg > 1)
		return -EINVAL;

		if (cfg && !ac->config)
		rc = sclp_ap_configure(ac->id);
		else if (!cfg && ac->config)
		rc = sclp_ap_deconfigure(ac->id);
		if (rc)
		return rc;

		ac->config = cfg ? true : false;

		return count;
		}

		static DEVICE_ATTR_RW(config);

		static struct attribute *ap_card_dev_attrs[] = {
		&dev_attr_hwtype.attr,

Admin message