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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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d3ae4b5bc7
It is just used as a parent to encapsulate two PBM objects. But that layout is only really relevant and necessary for psycho PCI controllers, which unlike all the others share a single IOMMU instance between sibling PCI busses. Signed-off-by: David S. Miller <davem@davemloft.net>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/* iommu.h: Definitions for the sun5 IOMMU.
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*
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* Copyright (C) 1996, 1999, 2007 David S. Miller (davem@davemloft.net)
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*/
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#ifndef _SPARC64_IOMMU_H
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#define _SPARC64_IOMMU_H
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/* The format of an iopte in the page tables. */
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#define IOPTE_VALID 0x8000000000000000UL
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#define IOPTE_64K 0x2000000000000000UL
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#define IOPTE_STBUF 0x1000000000000000UL
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#define IOPTE_INTRA 0x0800000000000000UL
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#define IOPTE_CONTEXT 0x07ff800000000000UL
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#define IOPTE_PAGE 0x00007fffffffe000UL
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#define IOPTE_CACHE 0x0000000000000010UL
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#define IOPTE_WRITE 0x0000000000000002UL
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#define IOMMU_NUM_CTXS 4096
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struct iommu_arena {
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unsigned long *map;
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unsigned int hint;
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unsigned int limit;
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};
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struct iommu {
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spinlock_t lock;
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struct iommu_arena arena;
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void (*flush_all)(struct iommu *);
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iopte_t *page_table;
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u32 page_table_map_base;
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unsigned long iommu_control;
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unsigned long iommu_tsbbase;
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unsigned long iommu_flush;
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unsigned long iommu_flushinv;
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unsigned long iommu_tags;
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unsigned long iommu_ctxflush;
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unsigned long write_complete_reg;
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unsigned long dummy_page;
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unsigned long dummy_page_pa;
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unsigned long ctx_lowest_free;
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DECLARE_BITMAP(ctx_bitmap, IOMMU_NUM_CTXS);
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u32 dma_addr_mask;
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};
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struct strbuf {
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int strbuf_enabled;
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unsigned long strbuf_control;
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unsigned long strbuf_pflush;
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unsigned long strbuf_fsync;
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unsigned long strbuf_err_stat;
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unsigned long strbuf_tag_diag;
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unsigned long strbuf_line_diag;
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unsigned long strbuf_ctxflush;
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unsigned long strbuf_ctxmatch_base;
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unsigned long strbuf_flushflag_pa;
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volatile unsigned long *strbuf_flushflag;
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volatile unsigned long __flushflag_buf[(64+(64-1)) / sizeof(long)];
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};
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extern int iommu_table_init(struct iommu *iommu, int tsbsize,
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u32 dma_offset, u32 dma_addr_mask,
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int numa_node);
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#endif /* !(_SPARC64_IOMMU_H) */
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