1 // SPDX-License-Identifier: GPL-2.0-only
3  * RISC-V specific functions to support DMA for non-coherent devices
8 #include <linux/dma-direct.h>
9 #include <linux/dma-map-ops.h>
15 void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,  in arch_sync_dma_for_device()  argument
22 		ALT_CMO_OP(clean, vaddr, size, riscv_cbom_block_size);  in arch_sync_dma_for_device()
25 		ALT_CMO_OP(clean, vaddr, size, riscv_cbom_block_size);  in arch_sync_dma_for_device()
28 		ALT_CMO_OP(flush, vaddr, size, riscv_cbom_block_size);  in arch_sync_dma_for_device()
35 void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,  in arch_sync_dma_for_cpu()  argument
45 		ALT_CMO_OP(flush, vaddr, size, riscv_cbom_block_size);  in arch_sync_dma_for_cpu()
52 void arch_dma_prep_coherent(struct page *page, size_t size)  in arch_dma_prep_coherent()  argument
56 	ALT_CMO_OP(flush, flush_addr, size, riscv_cbom_block_size);  in arch_dma_prep_coherent()
59 void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,  in arch_setup_dma_ops()  argument
64 		   "%s %s: ARCH_DMA_MINALIGN smaller than riscv,cbom-block-size (%d < %d)",  in arch_setup_dma_ops()
69 		   "%s %s: device non-coherent but no non-coherent operations supported",  in arch_setup_dma_ops()
72 	dev->dma_coherent = coherent;  in arch_setup_dma_ops()
78 	     "Non-coherent DMA support enabled without a block size\n");  in riscv_noncoherent_supported()