superrob1500
/
mirror-linux
mirror of https://github.com/torvalds/linux
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

dmaengine: dw-edma: Set status for callback_result 

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>
pull/1354/merge
Devendra K Verma 2025-08-21 17:45:05 +05:30 committed by Vinod Koul
parent a33e3b667d
commit 5e742de97c
1 changed files with 22 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/dma/dw-edma/dw-edma-core.c
View File

@ -584,6 +584,25 @@ dw_edma_device_prep_interleaved_dma(struct dma_chan *dchan,
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;
@ -597,6 +616,8 @@ 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);
}
@ -633,6 +654,7 @@ 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);
}