From 5caa2af97118308c79f29cc9876aec3ed504f9b0 Mon Sep 17 00:00:00 2001 From: Harald Freudenberger Date: Mon, 27 Jul 2020 14:49:34 +0200 Subject: [PATCH] s390/ap: Support AP card SCLP config and deconfig operations 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 Signed-off-by: Vasily Gorbik --- drivers/s390/crypto/ap_card.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c index bf1e964b0048..d98bdd28d23e 100644 --- a/drivers/s390/crypto/ap_card.c +++ b/drivers/s390/crypto/ap_card.c @@ -12,6 +12,7 @@ #include #include #include +#include #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,