1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations. 3 * 4 * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net) 5 */ 6 7 #ifndef _IOMMU_COMMON_H 8 #define _IOMMU_COMMON_H 9 10 #include <linux/kernel.h> 11 #include <linux/types.h> 12 #include <linux/sched.h> 13 #include <linux/mm.h> 14 #include <linux/scatterlist.h> 15 #include <linux/device.h> 16 #include <linux/iommu-helper.h> 17 18 #include <asm/iommu.h> 19 20 /* 21 * These give mapping size of each iommu pte/tlb. 22 */ 23 #define IO_PAGE_SHIFT 13 24 #define IO_PAGE_SIZE (1UL << IO_PAGE_SHIFT) 25 #define IO_PAGE_MASK (~(IO_PAGE_SIZE-1)) 26 #define IO_PAGE_ALIGN(addr) ALIGN(addr, IO_PAGE_SIZE) 27 28 #define IO_TSB_ENTRIES (128*1024) 29 #define IO_TSB_SIZE (IO_TSB_ENTRIES * 8) 30 31 /* 32 * This is the hardwired shift in the iotlb tag/data parts. 33 */ 34 #define IOMMU_PAGE_SHIFT 13 35 36 #define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG)))) 37 38 static inline int is_span_boundary(unsigned long entry, 39 unsigned long shift, 40 unsigned long boundary_size, 41 struct scatterlist *outs, 42 struct scatterlist *sg) 43 { 44 unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs); 45 int nr = iommu_num_pages(paddr, outs->dma_length + sg->length, 46 IO_PAGE_SIZE); 47 48 return iommu_is_span_boundary(entry, nr, shift, boundary_size); 49 } 50 51 #endif /* _IOMMU_COMMON_H */ 52