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Commit c2da2340 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Vinod Koul
Browse files

dmaengine: edma: Store transfer data in edma_desc and edma_pset 



For granular accounting we need to store the direction and the
information for the individual psets:

- source or destination address, depending on direction
- length

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarJoel Fernandes <joelf@ti.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent b5088ad9

drivers/dma/edma.c

+9 −0
Original line number Diff line number Diff line
@@ -58,12 +58,15 @@ 
#define EDMA_DESCRIPTORS	16



struct edma_pset {

	u32				len;

	dma_addr_t			addr;

	struct edmacc_param		param;

};



struct edma_desc {

	struct virt_dma_desc		vdesc;

	struct list_head		node;

	enum dma_transfer_direction	direction;

	int				cyclic;

	int				absync;

	int				pset_nr;
@@ -376,16 +379,20 @@ static int edma_config_pset(struct dma_chan *chan, struct edma_pset *epset, 
		cidx = acnt * bcnt;

	}



	epset->len = dma_length;



	if (direction == DMA_MEM_TO_DEV) {

		src_bidx = acnt;

		src_cidx = cidx;

		dst_bidx = 0;

		dst_cidx = 0;

		epset->addr = src_addr;

	} else if (direction == DMA_DEV_TO_MEM)  {

		src_bidx = 0;

		src_cidx = 0;

		dst_bidx = acnt;

		dst_cidx = cidx;

		epset->addr = dst_addr;

	} else if (direction == DMA_MEM_TO_MEM)  {

		src_bidx = acnt;

		src_cidx = cidx;
@@ -463,6 +470,7 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg( 


	edesc->pset_nr = sg_len;

	edesc->residue = 0;

	edesc->direction = direction;



	/* Allocate a PaRAM slot, if needed */

	nslots = min_t(unsigned, MAX_NR_SG, sg_len);
@@ -615,6 +623,7 @@ static struct dma_async_tx_descriptor *edma_prep_dma_cyclic( 
	edesc->cyclic = 1;

	edesc->pset_nr = nslots;

	edesc->residue = buf_len;

	edesc->direction = direction;



	dev_dbg(dev, "%s: channel=%d nslots=%d period_len=%zu buf_len=%zu\n",

		__func__, echan->ch_num, nslots, period_len, buf_len);