s390/pci: s390 specific PCI sysfs attributes
Add some s390 specific sysfs attributes to the PCI device directory.
The following attributes are introduced:
- function_id (PCI function ID)
- function_handle (PCI function handle)
- pchid (PCI channel ID)
- pfgid (PCI function group ID aka PCI root complex)
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/pci/pci_sysfs.c b/arch/s390/pci/pci_sysfs.c
new file mode 100644
index 0000000..a42cce6
--- /dev/null
+++ b/arch/s390/pci/pci_sysfs.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright IBM Corp. 2012
+ *
+ * Author(s):
+ * Jan Glauber <jang@linux.vnet.ibm.com>
+ */
+
+#define COMPONENT "zPCI"
+#define pr_fmt(fmt) COMPONENT ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/stat.h>
+#include <linux/pci.h>
+
+static ssize_t show_fid(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct zpci_dev *zdev = get_zdev(container_of(dev, struct pci_dev, dev));
+
+ sprintf(buf, "0x%08x\n", zdev->fid);
+ return strlen(buf);
+}
+static DEVICE_ATTR(function_id, S_IRUGO, show_fid, NULL);
+
+static ssize_t show_fh(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct zpci_dev *zdev = get_zdev(container_of(dev, struct pci_dev, dev));
+
+ sprintf(buf, "0x%08x\n", zdev->fh);
+ return strlen(buf);
+}
+static DEVICE_ATTR(function_handle, S_IRUGO, show_fh, NULL);
+
+static ssize_t show_pchid(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct zpci_dev *zdev = get_zdev(container_of(dev, struct pci_dev, dev));
+
+ sprintf(buf, "0x%04x\n", zdev->pchid);
+ return strlen(buf);
+}
+static DEVICE_ATTR(pchid, S_IRUGO, show_pchid, NULL);
+
+static ssize_t show_pfgid(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct zpci_dev *zdev = get_zdev(container_of(dev, struct pci_dev, dev));
+
+ sprintf(buf, "0x%02x\n", zdev->pfgid);
+ return strlen(buf);
+}
+static DEVICE_ATTR(pfgid, S_IRUGO, show_pfgid, NULL);
+
+static struct device_attribute *zpci_dev_attrs[] = {
+ &dev_attr_function_id,
+ &dev_attr_function_handle,
+ &dev_attr_pchid,
+ &dev_attr_pfgid,
+ NULL,
+};
+
+int zpci_sysfs_add_device(struct device *dev)
+{
+ int i, rc = 0;
+
+ for (i = 0; zpci_dev_attrs[i]; i++) {
+ rc = device_create_file(dev, zpci_dev_attrs[i]);
+ if (rc)
+ goto error;
+ }
+ return 0;
+
+error:
+ while (--i >= 0)
+ device_remove_file(dev, zpci_dev_attrs[i]);
+ return rc;
+}
+
+void zpci_sysfs_remove_device(struct device *dev)
+{
+ int i;
+
+ for (i = 0; zpci_dev_attrs[i]; i++)
+ device_remove_file(dev, zpci_dev_attrs[i]);
+}