Commit f2b816a1 authored by Swati Agarwal's avatar Swati Agarwal Committed by Vinod Koul
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dmaengine: zynqmp_dma: Add device_synchronize support 



dmaengine_synchronize implementation is required to synchronize proper
termination of current transfers so that any memory resources are not freed
while still in use.

Implement this callback in the driver so that framework can use the same
(in dmaengine_terminate_sync/ dmaengine_synchronize).

Signed-off-by: default avatarSwati Agarwal <swati.agarwal@amd.com>
Link: https://lore.kernel.org/r/20220915090516.5812-1-swati.agarwal@amd.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 41d8ffd7

drivers/dma/xilinx/zynqmp_dma.c

+12 −0
Original line number Diff line number Diff line
@@ -795,6 +795,17 @@ static int zynqmp_dma_device_terminate_all(struct dma_chan *dchan) 
	return 0;

}



/**

 * zynqmp_dma_synchronize - Synchronizes the termination of a transfers to the current context.

 * @dchan: DMA channel pointer

 */

static void zynqmp_dma_synchronize(struct dma_chan *dchan)

{

	struct zynqmp_dma_chan *chan = to_chan(dchan);



	tasklet_kill(&chan->tasklet);

}



/**

 * zynqmp_dma_prep_memcpy - prepare descriptors for memcpy transaction

 * @dchan: DMA channel
@@ -1057,6 +1068,7 @@ static int zynqmp_dma_probe(struct platform_device *pdev) 
	p = &zdev->common;

	p->device_prep_dma_memcpy = zynqmp_dma_prep_memcpy;

	p->device_terminate_all = zynqmp_dma_device_terminate_all;

	p->device_synchronize = zynqmp_dma_synchronize;

	p->device_issue_pending = zynqmp_dma_issue_pending;

	p->device_alloc_chan_resources = zynqmp_dma_alloc_chan_resources;

	p->device_free_chan_resources = zynqmp_dma_free_chan_resources;