s390/pci: add report_error attribute

Provide an report_error attribute to send an adapter-error
notification associated with a PCI function.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/pci/pci_sysfs.c

@@ -12,6 +12,8 @@
 #include <linux/stat.h>
 #include <linux/pci.h>
 
+#include <asm/sclp.h>
+
 #define zpci_attr(name, fmt, member)					\
 static ssize_t name##_show(struct device *dev,				\
 			   struct device_attribute *attr, char *buf)	\
@@ -77,8 +79,29 @@ static ssize_t util_string_read(struct file *filp, struct kobject *kobj,
 				       sizeof(zdev->util_str));
 }
 static BIN_ATTR_RO(util_string, CLP_UTIL_STR_LEN);
+
+static ssize_t report_error_write(struct file *filp, struct kobject *kobj,
+				  struct bin_attribute *attr, char *buf,
+				  loff_t off, size_t count)
+{
+	struct zpci_report_error_header *report = (void *) buf;
+	struct device *dev = kobj_to_dev(kobj);
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct zpci_dev *zdev = to_zpci(pdev);
+	int ret;
+
+	if (off || (count < sizeof(*report)))
+		return -EINVAL;
+
+	ret = sclp_pci_report(report, zdev->fh, zdev->fid);
+
+	return ret ? ret : count;
+}
+static BIN_ATTR(report_error, S_IWUSR, NULL, report_error_write, PAGE_SIZE);
+
 static struct bin_attribute *zpci_bin_attrs[] = {
 	&bin_attr_util_string,
+	&bin_attr_report_error,
 	NULL,
 };