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dmaengine: dma-axi-dmac: Implement device_prep_peripheral_dma_vec

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Add implementation of the .device_prep_peripheral_dma_vec() callback.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Co-developed-by: Nuno Sa <nuno.sa@analog.com>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240620122726.41232-3-paul@crapouillou.net
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Paul Cercueil 2024-06-20 14:27:21 +02:00 committed by Vinod Koul
parent 5878853fc9
commit 74609e5686
1 changed files with 40 additions and 0 deletions
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40
drivers/dma/dma-axi-dmac.c
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@ -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;