[PATCH 1/3] dmaengine: add dmaengine_prep_dma_pq(_val)() API
From: <hidden>
Date: 2026-09-21 23:09:20
Also in:
dmaengine, imx, lkml
Subsystem:
dma generic offload engine subsystem, the rest · Maintainers:
Vinod Koul, Linus Torvalds
From: Frank Li <Frank.Li@nxp.com> Add dmaengine_prep_dma_pq() and dmaengine_prep_dma_pq_val as an inline wrapper around the device_prep_dma_pq() and device_prep_dma_pq_val() callback, consistent with how other dmaengine prep helpers like dmaengine_prep_dma_memcpy() are structured. Provide a clean public API that hides the direct callback access and add proper NULL-checks on chan, chan->device, and the callback pointer. Assisted-by: LLM Signed-off-by: Frank Li <Frank.Li@nxp.com> --- include/linux/dmaengine.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index c3a49a33307c6..e3b5c23d7cb0d 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h@@ -1232,6 +1232,31 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_memcpy( len, flags); } +static inline struct dma_async_tx_descriptor * +dmaengine_prep_dma_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src, + unsigned int src_cnt, const unsigned char *scf, + size_t len, unsigned long flags) +{ + if (!chan || !chan->device || !chan->device->device_prep_dma_pq) + return NULL; + + return chan->device->device_prep_dma_pq(chan, dst, src, + src_cnt, scf, len, flags); +} + +static inline struct dma_async_tx_descriptor * +dmaengine_prep_dma_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src, + unsigned int src_cnt, const unsigned char *scf, + size_t len, enum sum_check_flags *pqres, unsigned long flags) +{ + if (!chan || !chan->device || !chan->device->device_prep_dma_pq_val) + return NULL; + + return chan->device->device_prep_dma_pq_val(chan, pq, src, + src_cnt, scf, len, + pqres, flags); +} + static inline bool dmaengine_is_metadata_mode_supported(struct dma_chan *chan, enum dma_desc_metadata_mode mode) {
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2.43.0