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iommu_64.h

/* iommu.h: Definitions for the sun5 IOMMU.
 *
 * Copyright (C) 1996, 1999, 2007 David S. Miller (davem@davemloft.net)
 */
#ifndef _SPARC64_IOMMU_H
#define _SPARC64_IOMMU_H

/* The format of an iopte in the page tables. */
#define IOPTE_VALID   0x8000000000000000UL
#define IOPTE_64K     0x2000000000000000UL
#define IOPTE_STBUF   0x1000000000000000UL
#define IOPTE_INTRA   0x0800000000000000UL
#define IOPTE_CONTEXT 0x07ff800000000000UL
#define IOPTE_PAGE    0x00007fffffffe000UL
#define IOPTE_CACHE   0x0000000000000010UL
#define IOPTE_WRITE   0x0000000000000002UL

#define IOMMU_NUM_CTXS  4096

struct iommu_arena {
      unsigned long     *map;
      unsigned int      hint;
      unsigned int      limit;
};

struct iommu {
      spinlock_t        lock;
      struct iommu_arena      arena;
      void              (*flush_all)(struct iommu *);
      iopte_t                 *page_table;
      u32               page_table_map_base;
      unsigned long           iommu_control;
      unsigned long           iommu_tsbbase;
      unsigned long           iommu_flush;
      unsigned long           iommu_flushinv;
      unsigned long           iommu_tags;
      unsigned long           iommu_ctxflush;
      unsigned long           write_complete_reg;
      unsigned long           dummy_page;
      unsigned long           dummy_page_pa;
      unsigned long           ctx_lowest_free;
      DECLARE_BITMAP(ctx_bitmap, IOMMU_NUM_CTXS);
      u32               dma_addr_mask;
};

struct strbuf {
      int               strbuf_enabled;
      unsigned long           strbuf_control;
      unsigned long           strbuf_pflush;
      unsigned long           strbuf_fsync;
      unsigned long           strbuf_ctxflush;
      unsigned long           strbuf_ctxmatch_base;
      unsigned long           strbuf_flushflag_pa;
      volatile unsigned long *strbuf_flushflag;
      volatile unsigned long  __flushflag_buf[(64+(64-1)) / sizeof(long)];
};

extern int iommu_table_init(struct iommu *iommu, int tsbsize,
                      u32 dma_offset, u32 dma_addr_mask,
                      int numa_node);

#endif /* !(_SPARC64_IOMMU_H) */

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