From f2b816a1dfb8b4bbbecd1603e6c17c3d457e2c0a Mon Sep 17 00:00:00 2001 From: Swati Agarwal Date: Thu, 15 Sep 2022 14:35:16 +0530 Subject: 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: Swati Agarwal Link: https://lore.kernel.org/r/20220915090516.5812-1-swati.agarwal@amd.com Signed-off-by: Vinod Koul --- drivers/dma/xilinx/zynqmp_dma.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/dma') diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c index dc299ab36818..2fc675327ec9 100644 --- a/drivers/dma/xilinx/zynqmp_dma.c +++ b/drivers/dma/xilinx/zynqmp_dma.c @@ -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; -- cgit v1.2.3