Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161031Ab1FAC3E (ORCPT ); Tue, 31 May 2011 22:29:04 -0400 Received: from tx2ehsobe004.messaging.microsoft.com ([65.55.88.14]:46852 "EHLO TX2EHSOBE009.bigfish.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933152Ab1FAC3C (ORCPT ); Tue, 31 May 2011 22:29:02 -0400 X-SpamScore: -9 X-BigFish: VS-9(zz1432N98dKzz1202hzz8275dhz2dh2a8h668h839h61h) X-Spam-TCS-SCL: 0:0 X-Forefront-Antispam-Report: CIP:70.37.183.190;KIP:(null);UIP:(null);IPVD:NLI;H:mail.freescale.net;RD:none;EFVD:NLI Date: Wed, 1 Jun 2011 10:33:57 +0800 From: Shawn Guo To: CC: , , , Subject: Re: [PATCH 1/3] dmaengine: add new dma API for max_segment_number Message-ID: <20110601023356.GA1501@S2100-06.ap.freescale.net> References: <1306391493-29425-1-git-send-email-shawn.guo@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <1306391493-29425-1-git-send-email-shawn.guo@linaro.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-OriginatorOrg: freescale.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1931 Lines: 65 Hi Vinod, Thoughts? -- Regards, Shawn On Thu, May 26, 2011 at 02:31:31PM +0800, Shawn Guo wrote: > Like dma_set(get)_max_seg_size for max_segment_size, the patch adds > max_segment_number into device_dma_parameters and creates the > corresponding dmaengine API dma_set(get)_max_seg_number for it. > > Signed-off-by: Shawn Guo > --- > include/linux/device.h | 1 + > include/linux/dma-mapping.h | 15 +++++++++++++++ > 2 files changed, 16 insertions(+), 0 deletions(-) > > diff --git a/include/linux/device.h b/include/linux/device.h > index c66111a..44cb2528 100644 > --- a/include/linux/device.h > +++ b/include/linux/device.h > @@ -487,6 +487,7 @@ struct device_dma_parameters { > * sg limitations. > */ > unsigned int max_segment_size; > + unsigned int max_segment_number; > unsigned long segment_boundary_mask; > }; > > diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h > index ba8319a..fd314f4 100644 > --- a/include/linux/dma-mapping.h > +++ b/include/linux/dma-mapping.h > @@ -131,6 +131,21 @@ static inline unsigned int dma_set_max_seg_size(struct device *dev, > return -EIO; > } > > +static inline unsigned int dma_get_max_seg_number(struct device *dev) > +{ > + return dev->dma_parms ? dev->dma_parms->max_segment_number : 1; > +} > + > +static inline unsigned int dma_set_max_seg_number(struct device *dev, > + unsigned int number) > +{ > + if (dev->dma_parms) { > + dev->dma_parms->max_segment_number = number; > + return 0; > + } else > + return -EIO; > +} > + > static inline unsigned long dma_get_seg_boundary(struct device *dev) > { > return dev->dma_parms ? > -- > 1.7.4.1 -- 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/