Xen devel - Dec 2008 - [PATCH 1/4] dom0 linux: Expose HID, UID, SEG, BBN of PCI root bridge via sysfs.

This patch exposes HID,UID,SEG,BBN of PCI root bridge via sysfs. 

Thanks,
--
Yuji Shimada.


Signed-off-by: Yuji Shimada <shimada-yxb@necst.nec.co.jp>

diff -r 618fc299e2f1 -r 4769a6db78f5 drivers/acpi/pci_root.c
--- a/drivers/acpi/pci_root.c	Thu Dec 18 11:51:36 2008 +0000
+++ b/drivers/acpi/pci_root.c	Thu Dec 25 10:37:52 2008 +0900
@@ -151,6 +151,36 @@
 	return AE_OK;
 }
 
+ssize_t
+acpi_device_seg_show(struct acpi_device *acpi_dev, char *buf) 
+{
+	struct list_head *entry;
+
+	list_for_each(entry, &acpi_pci_roots) {
+		struct acpi_pci_root *root;
+		root = list_entry(entry, struct acpi_pci_root, node);
+		if (root->device == acpi_dev)
+			return sprintf(buf, "%04x\n", root->id.segment);
+	}
+	return 0;
+}
+ACPI_DEVICE_ATTR(seg, 0444, acpi_device_seg_show, NULL);
+
+ssize_t
+acpi_device_bbn_show(struct acpi_device *acpi_dev, char *buf) 
+{
+	struct list_head *entry;
+
+	list_for_each(entry, &acpi_pci_roots) {
+		struct acpi_pci_root *root;
+		root = list_entry(entry, struct acpi_pci_root, node);
+		if (root->device == acpi_dev)
+			return sprintf(buf, "%02x\n", root->id.bus);
+	}
+	return 0;
+}
+ACPI_DEVICE_ATTR(bbn, 0444, acpi_device_bbn_show, NULL);
+
 static int acpi_pci_root_add(struct acpi_device *device)
 {
 	int result = 0;
@@ -298,6 +328,12 @@
 	if (ACPI_SUCCESS(status))
 		result = acpi_pci_irq_add_prt(device->handle, root->id.segment,
 					      root->id.bus);
+	if (result)
+		goto end;
+
+	sysfs_create_file(&device->kobj, &acpi_device_attr_seg.attr);
+
+	sysfs_create_file(&device->kobj, &acpi_device_attr_bbn.attr);
 
       end:
 	if (result) {
diff -r 618fc299e2f1 -r 4769a6db78f5 drivers/acpi/scan.c
--- a/drivers/acpi/scan.c	Thu Dec 18 11:51:36 2008 +0000
+++ b/drivers/acpi/scan.c	Thu Dec 25 10:37:52 2008 +0900
@@ -31,12 +31,6 @@
 	kfree(dev->pnp.cid_list);
 	kfree(dev);
 }
-
-struct acpi_device_attribute {
-	struct attribute attr;
-	 ssize_t(*show) (struct acpi_device *, char *);
-	 ssize_t(*store) (struct acpi_device *, const char *, size_t);
-};
 
 typedef void acpi_device_sysfs_files(struct kobject *,
 				     const struct attribute *);
@@ -111,6 +105,42 @@
 	.uevent_ops = &namespace_uevent_ops,
 };
 
+static ssize_t
+acpi_device_hid_show(struct acpi_device *acpi_dev, char *buf) 
+{
+	return sprintf(buf, "%s\n", acpi_dev->pnp.hardware_id);
+}
+ACPI_DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL);
+
+static ssize_t
+acpi_device_uid_show(struct acpi_device *acpi_dev, char *buf) 
+{
+	return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id);
+}
+ACPI_DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL);
+
+static int acpi_device_setup_files(struct acpi_device *dev)
+{
+	int result = 0;
+
+	if (dev->flags.hardware_id) {
+		result = sysfs_create_file(&dev->kobj,
+					&acpi_device_attr_hid.attr);
+		if (result)
+			goto end;
+	}
+
+	if (dev->flags.unique_id) {
+		result = sysfs_create_file(&dev->kobj,
+					&acpi_device_attr_uid.attr);
+		if (result)
+			goto end;
+	}
+
+      end:
+	return result;
+}
+
 static void acpi_device_register(struct acpi_device *device,
 				 struct acpi_device *parent)
 {
@@ -146,6 +176,7 @@
 		printk(KERN_WARNING "%s: kobject_register error: %d\n",
 			__FUNCTION__, err);
 	create_sysfs_device_files(device);
+	acpi_device_setup_files(device);
 }
 
 static void acpi_device_unregister(struct acpi_device *device, int type)
@@ -343,10 +374,6 @@
    --------------------------------------------------------------------------
*/
 static ssize_t acpi_eject_store(struct acpi_device *device,
 				const char *buf, size_t count);
-
-#define ACPI_DEVICE_ATTR(_name,_mode,_show,_store) \
-static struct acpi_device_attribute acpi_device_attr_##_name = \
-		__ATTR(_name, _mode, _show, _store)
 
 ACPI_DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
 
diff -r 618fc299e2f1 -r 4769a6db78f5 include/acpi/acpi_bus.h
--- a/include/acpi/acpi_bus.h	Thu Dec 18 11:51:36 2008 +0000
+++ b/include/acpi/acpi_bus.h	Thu Dec 25 10:37:52 2008 +0900
@@ -359,6 +359,16 @@
 acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->firmware_data))
 
+#define ACPI_DEVICE_ATTR(_name,_mode,_show,_store) \
+static struct acpi_device_attribute acpi_device_attr_##_name = \
+		__ATTR(_name, _mode, _show, _store)
+
+struct acpi_device_attribute {
+	struct attribute attr;
+	ssize_t(*show) (struct acpi_device *, char *);
+	ssize_t(*store) (struct acpi_device *, const char *, size_t);
+};
+
 #endif /* CONFIG_ACPI */
 
 #endif /*__ACPI_BUS_H__*/


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