Commit 74609e56 authored by Paul Cercueil's avatar Paul Cercueil Committed by Vinod Koul
Browse files

dmaengine: dma-axi-dmac: Implement device_prep_peripheral_dma_vec 



Add implementation of the .device_prep_peripheral_dma_vec() callback.

Signed-off-by: default avatarPaul Cercueil <paul@crapouillou.net>
Co-developed-by: default avatarNuno Sa <nuno.sa@analog.com>
Signed-off-by: default avatarNuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240620122726.41232-3-paul@crapouillou.net


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 5878853f

drivers/dma/dma-axi-dmac.c

+40 −0
Original line number Diff line number Diff line
@@ -620,6 +620,45 @@ static struct axi_dmac_sg *axi_dmac_fill_linear_sg(struct axi_dmac_chan *chan, 
	return sg;

}



static struct dma_async_tx_descriptor *

axi_dmac_prep_peripheral_dma_vec(struct dma_chan *c, const struct dma_vec *vecs,

				 size_t nb, enum dma_transfer_direction direction,

				 unsigned long flags)

{

	struct axi_dmac_chan *chan = to_axi_dmac_chan(c);

	struct axi_dmac_desc *desc;

	unsigned int num_sgs = 0;

	struct axi_dmac_sg *dsg;

	size_t i;



	if (direction != chan->direction)

		return NULL;



	for (i = 0; i < nb; i++)

		num_sgs += DIV_ROUND_UP(vecs[i].len, chan->max_length);



	desc = axi_dmac_alloc_desc(chan, num_sgs);

	if (!desc)

		return NULL;



	dsg = desc->sg;



	for (i = 0; i < nb; i++) {

		if (!axi_dmac_check_addr(chan, vecs[i].addr) ||

		    !axi_dmac_check_len(chan, vecs[i].len)) {

			kfree(desc);

			return NULL;

		}



		dsg = axi_dmac_fill_linear_sg(chan, direction, vecs[i].addr, 1,

					      vecs[i].len, dsg);

	}



	desc->cyclic = false;



	return vchan_tx_prep(&chan->vchan, &desc->vdesc, flags);

}



static struct dma_async_tx_descriptor *axi_dmac_prep_slave_sg(

	struct dma_chan *c, struct scatterlist *sgl,

	unsigned int sg_len, enum dma_transfer_direction direction,
@@ -1061,6 +1100,7 @@ static int axi_dmac_probe(struct platform_device *pdev) 
	dma_dev->device_tx_status = dma_cookie_status;

	dma_dev->device_issue_pending = axi_dmac_issue_pending;

	dma_dev->device_prep_slave_sg = axi_dmac_prep_slave_sg;

	dma_dev->device_prep_peripheral_dma_vec = axi_dmac_prep_peripheral_dma_vec;

	dma_dev->device_prep_dma_cyclic = axi_dmac_prep_dma_cyclic;

	dma_dev->device_prep_interleaved_dma = axi_dmac_prep_interleaved;

	dma_dev->device_terminate_all = axi_dmac_terminate_all;