riscv/mm/dma-noncoherent.c

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>
12 #include <asm/dma-noncoherent.h>
131 void arch_setup_dma_ops(struct device *dev, bool coherent)  in arch_setup_dma_ops()  argument
133 	WARN_TAINT(!coherent && riscv_cbom_block_size > ARCH_DMA_MINALIGN,  in arch_setup_dma_ops()
135 		   "%s %s: ARCH_DMA_MINALIGN smaller than riscv,cbom-block-size (%d < %d)",  in arch_setup_dma_ops()
139 	WARN_TAINT(!coherent && !noncoherent_supported, TAINT_CPU_OUT_OF_SPEC,  in arch_setup_dma_ops()
140 		   "%s %s: device non-coherent but no non-coherent operations supported",  in arch_setup_dma_ops()
143 	dev->dma_coherent = coherent;  in arch_setup_dma_ops()
149 	     "Non-coherent DMA support enabled without a block size\n");  in riscv_noncoherent_supported()