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dmaengine: dw-edma: Set status for callback_result

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[ Upstream commit 5e742de97c806a4048418237ef1283e7d71eaf4b ]

DMA Engine has support for the callback_result which provides
the status of the request and the residue. This helps in
determining the correct status of the request and in
efficient resource management of the request.
The 'callback_result' method is preferred over the deprecated
'callback' method.

Signed-off-by: Devendra K Verma <devverma@amd.com>
Link: https://lore.kernel.org/r/20250821121505.318179-1-devverma@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Devendra K Verma 2025-08-21 17:45:05 +05:30 • committed by Greg Kroah-Hartman
commit b8461af1f2
1 changed files with 22 additions and 0 deletions
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22
drivers/dma/dw-edma/dw-edma-core.c
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@ -474,6 +474,25 @@ dw_edma_device_prep_dma_cyclic(struct dma_chan *dchan, dma_addr_t paddr,
return dw_edma_device_transfer(&xfer);
}
static void dw_hdma_set_callback_result(struct virt_dma_desc *vd,
enum dmaengine_tx_result result)
{
u32 residue = 0;
struct dw_edma_desc *desc;
struct dmaengine_result *res;
if (!vd->tx.callback_result)
return;
desc = vd2dw_edma_desc(vd);
if (desc)
residue = desc->alloc_sz - desc->xfer_sz;
res = &vd->tx_result;
res->result = result;
res->residue = residue;
}
static void dw_edma_done_interrupt(struct dw_edma_chan *chan)
{
struct dw_edma_desc *desc;
@ -489,6 +508,8 @@ static void dw_edma_done_interrupt(struct dw_edma_chan *chan)
case EDMA_REQ_NONE:
desc = vd2dw_edma_desc(vd);
if (!desc->chunks_alloc) {
dw_hdma_set_callback_result(vd,
DMA_TRANS_NOERROR);
list_del(&vd->node);
vchan_cookie_complete(vd);
}
@ -527,6 +548,7 @@ static void dw_edma_abort_interrupt(struct dw_edma_chan *chan)
spin_lock_irqsave(&chan->vc.lock, flags);
vd = vchan_next_desc(&chan->vc);
if (vd) {
dw_hdma_set_callback_result(vd, DMA_TRANS_ABORTED);
list_del(&vd->node);
vchan_cookie_complete(vd);
}