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drivers: dma: atcdmac300: add flush chain_block when Data cache is enabled

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Add cache flush to ensure dma_chain is written back to memory
for DMA coherence

Signed-off-by: jacob kung <jacob.kung@egistec.com>
This commit is contained in:
jacob kung 2025-05-28 00:28:51 +08:00 • committed by Benjamin Cabé
commit 2fe357a592
1 changed files with 15 additions and 0 deletions
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15
drivers/dma/dma_andes_atcdmac300.c
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@ -12,6 +12,12 @@
#include <zephyr/init.h>
#include <zephyr/drivers/dma.h>
#ifdef CONFIG_DCACHE
#ifdef CONFIG_CACHE_MANAGEMENT
#include <zephyr/cache.h>
#endif
#endif
#define DT_DRV_COMPAT andestech_atcdmac300
#define LOG_LEVEL CONFIG_DMA_LOG_LEVEL
@ -393,6 +399,15 @@ static int dma_atcdmac300_config(const struct device *dev, uint32_t channel,
sys_write32(0, DMA_CH_LL_PTR_H(dev, channel));
}
#ifdef CONFIG_DCACHE
#ifdef CONFIG_CACHE_MANAGEMENT
cache_data_flush_range((void *)&dma_chain, sizeof(dma_chain));
#else
#error "Data cache is enabled; please flush the cache after \
setting dma_chain to ensure memory coherence."
#endif
#endif
end:
return ret;
}