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dmaengine: rcar-dmac: group slave configuration 

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 Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Niklas Söderlund 2016-08-10 13:22:18 +02:00 коммит произвёл Vinod Koul
Родитель 24ed5d2c07
Коммит c5ed08e988
1 изменённых файлов: 22 добавлений и 16 удалений
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38
drivers/dma/sh/rcar-dmac.c
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@ -117,15 +117,23 @@ struct rcar_dmac_desc_page {
((PAGE_SIZE - offsetof(struct rcar_dmac_desc_page, chunks)) / \
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;
dma_addr_t src_slave_addr;
dma_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:
@ -1040,7 +1046,7 @@ 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);
}
@ -1095,7 +1101,7 @@ 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);
@ -1112,10 +1118,10 @@ 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;
}