1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* iommu.h: Definitions for the sun5 IOMMU. 3 * 4 * Copyright (C) 1996, 1999, 2007 David S. Miller (davem@davemloft.net) 5 */ 6 #ifndef _SPARC64_IOMMU_H 7 #define _SPARC64_IOMMU_H 8 9 /* The format of an iopte in the page tables. */ 10 #define IOPTE_VALID 0x8000000000000000UL 11 #define IOPTE_64K 0x2000000000000000UL 12 #define IOPTE_STBUF 0x1000000000000000UL 13 #define IOPTE_INTRA 0x0800000000000000UL 14 #define IOPTE_CONTEXT 0x07ff800000000000UL 15 #define IOPTE_PAGE 0x00007fffffffe000UL 16 #define IOPTE_CACHE 0x0000000000000010UL 17 #define IOPTE_WRITE 0x0000000000000002UL 18 19 #define IOMMU_NUM_CTXS 4096 20 #include <asm/iommu-common.h> 21 22 struct iommu_arena { 23 unsigned long *map; 24 unsigned int hint; 25 unsigned int limit; 26 }; 27 28 #define ATU_64_SPACE_SIZE 0x800000000 /* 32G */ 29 30 /* Data structures for SPARC ATU architecture */ 31 struct atu_iotsb { 32 void *table; /* IOTSB table base virtual addr*/ 33 u64 ra; /* IOTSB table real addr */ 34 u64 dvma_size; /* ranges[3].size or OS slected 32G size */ 35 u64 dvma_base; /* ranges[3].base */ 36 u64 table_size; /* IOTSB table size */ 37 u64 page_size; /* IO PAGE size for IOTSB */ 38 u32 iotsb_num; /* tsbnum is same as iotsb_handle */ 39 }; 40 41 struct atu_ranges { 42 u64 base; 43 u64 size; 44 }; 45 46 struct atu { 47 struct atu_ranges *ranges; 48 struct atu_iotsb *iotsb; 49 struct iommu_map_table tbl; 50 u64 base; 51 u64 size; 52 u64 dma_addr_mask; 53 }; 54 55 struct iommu { 56 struct iommu_map_table tbl; 57 struct atu *atu; 58 spinlock_t lock; 59 u32 dma_addr_mask; 60 iopte_t *page_table; 61 unsigned long iommu_control; 62 unsigned long iommu_tsbbase; 63 unsigned long iommu_flush; 64 unsigned long iommu_flushinv; 65 unsigned long iommu_tags; 66 unsigned long iommu_ctxflush; 67 unsigned long write_complete_reg; 68 unsigned long dummy_page; 69 unsigned long dummy_page_pa; 70 unsigned long ctx_lowest_free; 71 DECLARE_BITMAP(ctx_bitmap, IOMMU_NUM_CTXS); 72 }; 73 74 struct strbuf { 75 int strbuf_enabled; 76 unsigned long strbuf_control; 77 unsigned long strbuf_pflush; 78 unsigned long strbuf_fsync; 79 unsigned long strbuf_err_stat; 80 unsigned long strbuf_tag_diag; 81 unsigned long strbuf_line_diag; 82 unsigned long strbuf_ctxflush; 83 unsigned long strbuf_ctxmatch_base; 84 unsigned long strbuf_flushflag_pa; 85 volatile unsigned long *strbuf_flushflag; 86 volatile unsigned long __flushflag_buf[(64+(64-1)) / sizeof(long)]; 87 }; 88 89 int iommu_table_init(struct iommu *iommu, int tsbsize, 90 u32 dma_offset, u32 dma_addr_mask, 91 int numa_node); 92 93 #endif /* !(_SPARC64_IOMMU_H) */ 94