Lines Matching +full:dma +full:- +full:coherent

2  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
9 #include <linux/dma-noncoherent.h>
14  * ARCH specific callbacks for generic noncoherent DMA ops (dma/noncoherent.c)
15  *  - hardware IOC not available (or "dma-coherent" not set for device in DT)
16  *  - But still handle both coherent and non-coherent requests from caller
18  * For DMA coherent hardware (IOC) generic code suffices
31 	 * (in include/linux/dma-mapping.h) so we should never get a  in arch_dma_alloc()
46 	 * A coherent buffer needs MMU mapping to enforce non-cachability.  in arch_dma_alloc()
62 	 * Yeah this bit us - STAR 9000898266  in arch_dma_alloc()
94 	unsigned long off = vma->vm_pgoff;  in arch_dma_mmap()
95 	int ret = -ENXIO;  in arch_dma_mmap()
97 	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);  in arch_dma_mmap()
102 	if (off < count && user_count <= (count - off)) {  in arch_dma_mmap()
103 		ret = remap_pfn_range(vma, vma->vm_start,  in arch_dma_mmap()
106 				      vma->vm_page_prot);  in arch_dma_mmap()
116  * dma-mapping: provide a generic dma-noncoherent implementation)"
119  *          |----------------------------------------------------------------
127  * upper layer functions (in include/linux/dma-mapping.h)
170  * Plug in coherent or noncoherent dma ops
173 			const struct iommu_ops *iommu, bool coherent)  in arch_setup_dma_ops()  argument
176 	 * IOC hardware snoops all DMA traffic keeping the caches consistent  in arch_setup_dma_ops()
177 	 * with memory - eliding need for any explicit cache maintenance of  in arch_setup_dma_ops()
178 	 * DMA buffers - so we can use dma_direct cache ops.  in arch_setup_dma_ops()
180 	if (is_isa_arcv2() && ioc_enable && coherent) {  in arch_setup_dma_ops()