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author | Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> | 2016-08-10 13:22:18 +0200 |
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committer | Vinod Koul <vinod.koul@intel.com> | 2016-09-26 22:16:41 +0530 |
commit | c5ed08e988a35b4b7f8c54dfd9edfb592991fae6 (patch) | |
tree | 82f90c595980c992c39980bed5c9f64e61e6144f /drivers/dma/sh | |
parent | 24ed5d2c07e36ebaf0e8ce483a41b8e44d7499d4 (diff) | |
download | blackbird-op-linux-c5ed08e988a35b4b7f8c54dfd9edfb592991fae6.tar.gz blackbird-op-linux-c5ed08e988a35b4b7f8c54dfd9edfb592991fae6.zip |
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>
Diffstat (limited to 'drivers/dma/sh')
-rw-r--r-- | drivers/dma/sh/rcar-dmac.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c index 0dd953884d1d..cf983a9df3f1 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; - 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; } |