From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/sparc/kernel/iommu_common.h | 51 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 arch/sparc/kernel/iommu_common.h (limited to 'arch/sparc/kernel/iommu_common.h') diff --git a/arch/sparc/kernel/iommu_common.h b/arch/sparc/kernel/iommu_common.h new file mode 100644 index 000000000..d62ed9c56 --- /dev/null +++ b/arch/sparc/kernel/iommu_common.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations. + * + * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net) + */ + +#ifndef _IOMMU_COMMON_H +#define _IOMMU_COMMON_H + +#include +#include +#include +#include +#include +#include +#include + +#include + +/* + * These give mapping size of each iommu pte/tlb. + */ +#define IO_PAGE_SHIFT 13 +#define IO_PAGE_SIZE (1UL << IO_PAGE_SHIFT) +#define IO_PAGE_MASK (~(IO_PAGE_SIZE-1)) +#define IO_PAGE_ALIGN(addr) ALIGN(addr, IO_PAGE_SIZE) + +#define IO_TSB_ENTRIES (128*1024) +#define IO_TSB_SIZE (IO_TSB_ENTRIES * 8) + +/* + * This is the hardwired shift in the iotlb tag/data parts. + */ +#define IOMMU_PAGE_SHIFT 13 + +#define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG)))) + +static inline int is_span_boundary(unsigned long entry, + unsigned long shift, + unsigned long boundary_size, + struct scatterlist *outs, + struct scatterlist *sg) +{ + unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs); + int nr = iommu_num_pages(paddr, outs->dma_length + sg->length, + IO_PAGE_SIZE); + + return iommu_is_span_boundary(entry, nr, shift, boundary_size); +} + +#endif /* _IOMMU_COMMON_H */ -- cgit v1.2.3