firewire: Implement ioctl to initiate bus reset.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

drivers/firewire/fw-device-cdev.c

@@ -433,6 +433,19 @@ static int ioctl_send_response(struct client *client, void __user *arg)
 	return 0;
 }
 
+static int ioctl_initiate_bus_reset(struct client *client, void __user *arg)
+{
+	struct fw_cdev_initiate_bus_reset request;
+	int short_reset;
+
+	if (copy_from_user(&request, arg, sizeof request))
+		return -EFAULT;
+
+	short_reset = (request.type == FW_CDEV_SHORT_RESET);
+
+	return fw_core_initiate_bus_reset(client->device->card, short_reset);
+}
+
 static void
 iso_callback(struct fw_iso_context *context, u32 cycle,
 	     size_t header_length, void *header, void *data)
@@ -606,6 +619,8 @@ dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg)
 		return ioctl_allocate(client, arg);
 	case FW_CDEV_IOC_SEND_RESPONSE:
 		return ioctl_send_response(client, arg);
+	case FW_CDEV_IOC_INITIATE_BUS_RESET:
+		return ioctl_initiate_bus_reset(client, arg);
 	case FW_CDEV_IOC_CREATE_ISO_CONTEXT:
 		return ioctl_create_iso_context(client, arg);
 	case FW_CDEV_IOC_QUEUE_ISO:

drivers/firewire/fw-device-cdev.h

@@ -108,10 +108,11 @@ struct fw_cdev_event_iso_interrupt {
 #define FW_CDEV_IOC_SEND_REQUEST	_IO('#', 0x01)
 #define FW_CDEV_IOC_ALLOCATE		_IO('#', 0x02)
 #define FW_CDEV_IOC_SEND_RESPONSE	_IO('#', 0x03)
-#define FW_CDEV_IOC_CREATE_ISO_CONTEXT	_IO('#', 0x04)
-#define FW_CDEV_IOC_QUEUE_ISO		_IO('#', 0x05)
-#define FW_CDEV_IOC_START_ISO		_IO('#', 0x06)
-#define FW_CDEV_IOC_STOP_ISO		_IO('#', 0x07)
+#define FW_CDEV_IOC_INITIATE_BUS_RESET	_IO('#', 0x04)
+#define FW_CDEV_IOC_CREATE_ISO_CONTEXT	_IO('#', 0x05)
+#define FW_CDEV_IOC_QUEUE_ISO		_IO('#', 0x06)
+#define FW_CDEV_IOC_START_ISO		_IO('#', 0x07)
+#define FW_CDEV_IOC_STOP_ISO		_IO('#', 0x08)
 
 struct fw_cdev_get_config_rom {
 	__u32 length;
@@ -139,6 +140,13 @@ struct fw_cdev_allocate {
 	__u32 length;
 };
 
+#define FW_CDEV_LONG_RESET	0
+#define FW_CDEV_SHORT_RESET	1
+
+struct fw_cdev_initiate_bus_reset {
+	__u32 type;
+};
+
 #define FW_CDEV_ISO_CONTEXT_TRANSMIT	0
 #define FW_CDEV_ISO_CONTEXT_RECEIVE	1