Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936346AbcCQQnc (ORCPT ); Thu, 17 Mar 2016 12:43:32 -0400 Received: from galahad.ideasonboard.com ([185.26.127.97]:33806 "EHLO galahad.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936159AbcCQQnZ convert rfc822-to-8bit (ORCPT ); Thu, 17 Mar 2016 12:43:25 -0400 From: Laurent Pinchart To: Niklas =?ISO-8859-1?Q?S=F6derlund?= Cc: vinod.koul@intel.com, linux-renesas-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, iommu@lists.linux-foundation.org, robin.murphy@arm.com, geert+renesas@glider.be, linus.walleij@linaro.org, dan.j.williams@intel.com, arnd@arndb.de, linux-arch@vger.kernel.org Subject: Re: [PATCH v5 6/9] dmaengine: rcar-dmac: group slave configuration Date: Thu, 17 Mar 2016 13:28:50 +0200 Message-ID: <5083144.aEzMy68lFX@avalon> User-Agent: KMail/4.14.8 (Linux/4.1.15-gentoo-r1; KDE/4.14.8; x86_64; ; ) In-Reply-To: <1457404974-1800-7-git-send-email-niklas.soderlund+renesas@ragnatech.se> References: <1457404974-1800-1-git-send-email-niklas.soderlund+renesas@ragnatech.se> <1457404974-1800-7-git-send-email-niklas.soderlund+renesas@ragnatech.se> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="iso-8859-1" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4049 Lines: 119 Hi Niklas, Thank you for the patch. On Tuesday 08 March 2016 03:42:51 Niklas S?derlund wrote: > Group slave address and transfer size in own structs for source and > destination. This is in preparation for hooking up the dma-mapping API > to the slave addresses. > > Signed-off-by: Niklas S?derlund Reviewed-by: Laurent Pinchart > --- > drivers/dma/sh/rcar-dmac.c | 38 ++++++++++++++++++++++---------------- > 1 file changed, 22 insertions(+), 16 deletions(-) > > diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c > index 01cf82f..b3911fe 100644 > --- a/drivers/dma/sh/rcar-dmac.c > +++ b/drivers/dma/sh/rcar-dmac.c > @@ -118,14 +118,22 @@ struct rcar_dmac_desc_page { > sizeof(struct rcar_dmac_xfer_chunk)) > > /* > + * struct rcar_dmac_chan_slave - Slave configuration > + * @slave_addr: slave memory address > + * @xfer_size: size (in bytes) of hardware transfers > + */ > +struct rcar_dmac_chan_slave { > + phys_addr_t slave_addr; > + unsigned int xfer_size; > +}; > + > +/* > * struct rcar_dmac_chan - R-Car Gen2 DMA Controller Channel > * @chan: base DMA channel object > * @iomem: channel I/O memory base > * @index: index of this channel in the controller > - * @src_xfer_size: size (in bytes) of hardware transfers on the source side > - * @dst_xfer_size: size (in bytes) of hardware transfers on the > destination side - * @src_slave_addr: slave source memory address > - * @dst_slave_addr: slave destination memory address > + * @src: slave memory address and size on the source side > + * @dst: slave memory address and size on the destination side > * @mid_rid: hardware MID/RID for the DMA client using this channel > * @lock: protects the channel CHCR register and the desc members > * @desc.free: list of free descriptors > @@ -142,10 +150,8 @@ struct rcar_dmac_chan { > void __iomem *iomem; > unsigned int index; > > - unsigned int src_xfer_size; > - unsigned int dst_xfer_size; > - phys_addr_t src_slave_addr; > - phys_addr_t dst_slave_addr; > + struct rcar_dmac_chan_slave src; > + struct rcar_dmac_chan_slave dst; > int mid_rid; > > spinlock_t lock; > @@ -793,13 +799,13 @@ static void rcar_dmac_chan_configure_desc(struct > rcar_dmac_chan *chan, case DMA_DEV_TO_MEM: > chcr = RCAR_DMACHCR_DM_INC | RCAR_DMACHCR_SM_FIXED > > | RCAR_DMACHCR_RS_DMARS; > > - xfer_size = chan->src_xfer_size; > + xfer_size = chan->src.xfer_size; > break; > > case DMA_MEM_TO_DEV: > chcr = RCAR_DMACHCR_DM_FIXED | RCAR_DMACHCR_SM_INC > > | RCAR_DMACHCR_RS_DMARS; > > - xfer_size = chan->dst_xfer_size; > + xfer_size = chan->dst.xfer_size; > break; > > case DMA_MEM_TO_MEM: > @@ -1038,7 +1044,7 @@ rcar_dmac_prep_slave_sg(struct dma_chan *chan, struct > scatterlist *sgl, } > > dev_addr = dir == DMA_DEV_TO_MEM > - ? rchan->src_slave_addr : rchan->dst_slave_addr; > + ? rchan->src.slave_addr : rchan->dst.slave_addr; > return rcar_dmac_chan_prep_sg(rchan, sgl, sg_len, dev_addr, > dir, flags, false); > } > @@ -1093,7 +1099,7 @@ rcar_dmac_prep_dma_cyclic(struct dma_chan *chan, > dma_addr_t buf_addr, } > > dev_addr = dir == DMA_DEV_TO_MEM > - ? rchan->src_slave_addr : rchan->dst_slave_addr; > + ? rchan->src.slave_addr : rchan->dst.slave_addr; > desc = rcar_dmac_chan_prep_sg(rchan, sgl, sg_len, dev_addr, > dir, flags, true); > > @@ -1110,10 +1116,10 @@ static int rcar_dmac_device_config(struct dma_chan > *chan, * We could lock this, but you shouldn't be configuring the > * channel, while using it... > */ > - rchan->src_slave_addr = cfg->src_addr; > - rchan->dst_slave_addr = cfg->dst_addr; > - rchan->src_xfer_size = cfg->src_addr_width; > - rchan->dst_xfer_size = cfg->dst_addr_width; > + rchan->src.slave_addr = cfg->src_addr; > + rchan->dst.slave_addr = cfg->dst_addr; > + rchan->src.xfer_size = cfg->src_addr_width; > + rchan->dst.xfer_size = cfg->dst_addr_width; > > return 0; > } -- Regards, Laurent Pinchart