Hi Raj, On Mon, Nov 05, 2018 at 07:05:53PM +0000, Mani, Rajmohan wrote: > Hi Sakari, > > > -----Original Message----- > > From: Sakari Ailus [mailto:sakari.ai...@linux.intel.com] > > Sent: Monday, November 05, 2018 12:28 AM > > To: Zhi, Yong <yong....@intel.com> > > Cc: linux-media@vger.kernel.org; tf...@chromium.org; mche...@kernel.org; > > hans.verk...@cisco.com; laurent.pinch...@ideasonboard.com; Mani, > > Rajmohan <rajmohan.m...@intel.com>; Zheng, Jian Xu > > <jian.xu.zh...@intel.com>; Hu, Jerry W <jerry.w...@intel.com>; Toivonen, > > Tuukka <tuukka.toivo...@intel.com>; Qiu, Tian Shu > > <tian.shu....@intel.com>; Cao, Bingbu <bingbu....@intel.com> > > Subject: Re: [PATCH v7 05/16] intel-ipu3: abi: Add structs > > > > Hi Yong, > > > > On Mon, Oct 29, 2018 at 03:22:59PM -0700, Yong Zhi wrote: > > > This add all the structs of IPU3 firmware ABI. > > > > > > Signed-off-by: Yong Zhi <yong....@intel.com> > > > Signed-off-by: Rajmohan Mani <rajmohan.m...@intel.com> > > > > ... > > > > > +struct imgu_abi_shd_intra_frame_operations_data { > > > + struct imgu_abi_acc_operation > > > + operation_list[IMGU_ABI_SHD_MAX_OPERATIONS] > > __attribute__((aligned(32))); > > > + struct imgu_abi_acc_process_lines_cmd_data > > > + process_lines_data[IMGU_ABI_SHD_MAX_PROCESS_LINES] > > __attribute__((aligned(32))); > > > + struct imgu_abi_shd_transfer_luts_set_data > > > + transfer_data[IMGU_ABI_SHD_MAX_TRANSFERS] > > > +__attribute__((aligned(32))); > > > > Could you replace this wth __aligned(32), please? The same for the rest of > > the > > header. > > > > Using __aligned(32) in the uAPI header resulted in compilation errors in > user space / camera HAL code. > > e.g > ../../../../../../../../usr/include/linux/intel-ipu3.h:464:57: error: > expected ';' > at end of declaration list > __u8 bayer_table[IPU3_UAPI_AWB_FR_BAYER_TABLE_MAX_SIZE] __aligned(32); > > So we ended up using __attribute__((aligned(32))) format in uAPI header and > to be consistent, we followed the same format in ABI header as well. > > Let us know if it's okay to deviate between uAPI and ABI header for this > alignment qualifier.
There's a reason for using __attribute__((aligned(32))) in the uAPI header, but not in the in-kernel headers where __aligned(32) is preferred. I have a patch for addressing this for the uAPI headers as well so __aligned(32) could be used there, too; I'll submit it soon. Let's see... there are kerneldoc issues still in this area. -- Regards, Sakari Ailus sakari.ai...@linux.intel.com
