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51 lines
1.3 KiB
51 lines
1.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations. |
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* |
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* Copyright (C) 1999, 2008 David S. Miller ([email protected]) |
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*/ |
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#ifndef _IOMMU_COMMON_H |
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#define _IOMMU_COMMON_H |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/sched.h> |
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#include <linux/mm.h> |
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#include <linux/scatterlist.h> |
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#include <linux/device.h> |
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#include <linux/iommu-helper.h> |
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#include <asm/iommu.h> |
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/* |
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* These give mapping size of each iommu pte/tlb. |
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*/ |
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#define IO_PAGE_SHIFT 13 |
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#define IO_PAGE_SIZE (1UL << IO_PAGE_SHIFT) |
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#define IO_PAGE_MASK (~(IO_PAGE_SIZE-1)) |
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#define IO_PAGE_ALIGN(addr) ALIGN(addr, IO_PAGE_SIZE) |
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#define IO_TSB_ENTRIES (128*1024) |
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#define IO_TSB_SIZE (IO_TSB_ENTRIES * 8) |
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/* |
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* This is the hardwired shift in the iotlb tag/data parts. |
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*/ |
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#define IOMMU_PAGE_SHIFT 13 |
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#define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG)))) |
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static inline int is_span_boundary(unsigned long entry, |
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unsigned long shift, |
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unsigned long boundary_size, |
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struct scatterlist *outs, |
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struct scatterlist *sg) |
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{ |
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unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs); |
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int nr = iommu_num_pages(paddr, outs->dma_length + sg->length, |
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IO_PAGE_SIZE); |
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return iommu_is_span_boundary(entry, nr, shift, boundary_size); |
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} |
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#endif /* _IOMMU_COMMON_H */
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