18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef ASM_ARM_DMA_DIRECT_H 38c2ecf20Sopenharmony_ci#define ASM_ARM_DMA_DIRECT_H 1 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci#include <asm/memory.h> 68c2ecf20Sopenharmony_ci 78c2ecf20Sopenharmony_ci/* 88c2ecf20Sopenharmony_ci * dma_to_pfn/pfn_to_dma/virt_to_dma are architecture private 98c2ecf20Sopenharmony_ci * functions used internally by the DMA-mapping API to provide DMA 108c2ecf20Sopenharmony_ci * addresses. They must not be used by drivers. 118c2ecf20Sopenharmony_ci */ 128c2ecf20Sopenharmony_cistatic inline dma_addr_t pfn_to_dma(struct device *dev, unsigned long pfn) 138c2ecf20Sopenharmony_ci{ 148c2ecf20Sopenharmony_ci if (dev && dev->dma_range_map) 158c2ecf20Sopenharmony_ci pfn = PFN_DOWN(translate_phys_to_dma(dev, PFN_PHYS(pfn))); 168c2ecf20Sopenharmony_ci return (dma_addr_t)__pfn_to_bus(pfn); 178c2ecf20Sopenharmony_ci} 188c2ecf20Sopenharmony_ci 198c2ecf20Sopenharmony_cistatic inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr) 208c2ecf20Sopenharmony_ci{ 218c2ecf20Sopenharmony_ci unsigned long pfn = __bus_to_pfn(addr); 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_ci if (dev && dev->dma_range_map) 248c2ecf20Sopenharmony_ci pfn = PFN_DOWN(translate_dma_to_phys(dev, PFN_PHYS(pfn))); 258c2ecf20Sopenharmony_ci return pfn; 268c2ecf20Sopenharmony_ci} 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_cistatic inline dma_addr_t virt_to_dma(struct device *dev, void *addr) 298c2ecf20Sopenharmony_ci{ 308c2ecf20Sopenharmony_ci if (dev) 318c2ecf20Sopenharmony_ci return pfn_to_dma(dev, virt_to_pfn(addr)); 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_ci return (dma_addr_t)__virt_to_bus((unsigned long)(addr)); 348c2ecf20Sopenharmony_ci} 358c2ecf20Sopenharmony_ci 368c2ecf20Sopenharmony_cistatic inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) 378c2ecf20Sopenharmony_ci{ 388c2ecf20Sopenharmony_ci unsigned int offset = paddr & ~PAGE_MASK; 398c2ecf20Sopenharmony_ci return pfn_to_dma(dev, __phys_to_pfn(paddr)) + offset; 408c2ecf20Sopenharmony_ci} 418c2ecf20Sopenharmony_ci 428c2ecf20Sopenharmony_cistatic inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) 438c2ecf20Sopenharmony_ci{ 448c2ecf20Sopenharmony_ci unsigned int offset = dev_addr & ~PAGE_MASK; 458c2ecf20Sopenharmony_ci return __pfn_to_phys(dma_to_pfn(dev, dev_addr)) + offset; 468c2ecf20Sopenharmony_ci} 478c2ecf20Sopenharmony_ci 488c2ecf20Sopenharmony_ci#endif /* ASM_ARM_DMA_DIRECT_H */ 49