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/* SPDX-License-Identifier: GPL-2.0 */
/* iommu.h: Definitions for the sun5 IOMMU.
*
* Copyright (C) 1996, 1999, 2007 David S. Miller ([email protected])
*/
#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
#include <asm/iommu-common.h>
struct iommu_arena {
unsigned long *map;
unsigned int hint;
unsigned int limit;
};
#define ATU_64_SPACE_SIZE 0x800000000 /* 32G */
/* Data structures for SPARC ATU architecture */
struct atu_iotsb {
void *table; /* IOTSB table base virtual addr*/
u64 ra; /* IOTSB table real addr */
u64 dvma_size; /* ranges[3].size or OS slected 32G size */
u64 dvma_base; /* ranges[3].base */
u64 table_size; /* IOTSB table size */
u64 page_size; /* IO PAGE size for IOTSB */
u32 iotsb_num; /* tsbnum is same as iotsb_handle */
};
struct atu_ranges {
u64 base;
u64 size;
};
struct atu {
struct atu_ranges *ranges;
struct atu_iotsb *iotsb;
struct iommu_map_table tbl;
u64 base;
u64 size;
u64 dma_addr_mask;
};
struct iommu {
struct iommu_map_table tbl;
struct atu *atu;
spinlock_t lock;
u32 dma_addr_mask;
iopte_t *page_table;
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);
};
struct strbuf {
int strbuf_enabled;
unsigned long strbuf_control;
unsigned long strbuf_pflush;
unsigned long strbuf_fsync;
unsigned long strbuf_err_stat;
unsigned long strbuf_tag_diag;
unsigned long strbuf_line_diag;
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)];
};
int iommu_table_init(struct iommu *iommu, int tsbsize,
u32 dma_offset, u32 dma_addr_mask,
int numa_node);
#endif /* !(_SPARC64_IOMMU_H) */