Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751888Ab0BULtM (ORCPT ); Sun, 21 Feb 2010 06:49:12 -0500 Received: from einhorn.in-berlin.de ([192.109.42.8]:56900 "EHLO einhorn.in-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751700Ab0BULtK (ORCPT ); Sun, 21 Feb 2010 06:49:10 -0500 X-Envelope-From: stefanr@s5r6.in-berlin.de Date: Sun, 21 Feb 2010 12:48:57 +0100 (CET) From: Stefan Richter Subject: [PATCH update] firewire: cdev: increment ABI version number To: linux1394-devel@lists.sourceforge.net, Pieter Palmers cc: linux-kernel@vger.kernel.org In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; CHARSET=us-ascii Content-Disposition: INLINE Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2100 Lines: 54 so that clients can detect whether the FW_CDEV_IOC_GET_CYCLE_TIMER ioctl is reliable (on all tested controllers, especially the widely used VIA controllers, also NEC controllers, see commits b677532b and 1c1517ef). Also add a comment on the 2.6.32 iso xmit enhancement and on dual-buffer IR having been disabled in 2.6.33. Signed-off-by: Stefan Richter --- Update: added the 2.6.33 item include/linux/firewire-cdev.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) Index: b/include/linux/firewire-cdev.h =================================================================== --- a/include/linux/firewire-cdev.h +++ b/include/linux/firewire-cdev.h @@ -256,8 +256,12 @@ union fw_cdev_event { * 1 (2.6.22) - initial version * 2 (2.6.30) - changed &fw_cdev_event_iso_interrupt.header if * &fw_cdev_create_iso_context.header_size is 8 or more + * (2.6.32) - added time stamp to xmit &fw_cdev_event_iso_interrupt + * (2.6.33) - IR has always packet-per-buffer semantics now, not one of + * dual-buffer or packet-per-buffer depending on hardware + * 3 (2.6.34) - made &fw_cdev_get_cycle_timer reliable */ -#define FW_CDEV_VERSION 2 +#define FW_CDEV_VERSION 3 /** * struct fw_cdev_get_info - General purpose information ioctl @@ -556,6 +560,9 @@ struct fw_cdev_stop_iso { * @cycle_timer consists of 7 bits cycleSeconds, 13 bits cycleCount, and * 12 bits cycleOffset, in host byte order. Cf. the Cycle Time register * per IEEE 1394 or Isochronous Cycle Timer register per OHCI-1394. + * + * In version 1 and 2 of the ABI, this ioctl returned unreliable (non- + * monotonic) @cycle_timer values on certain controllers. */ struct fw_cdev_get_cycle_timer { __u64 local_time; -- Stefan Richter -=====-==-=- --=- =-=-= http://arcgraph.de/sr/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/