Annotation of sys/arch/sparc64/dev/iommuvar.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: iommuvar.h,v 1.10 2007/05/29 09:53:59 sobrado Exp $ */
! 2: /* $NetBSD: iommuvar.h,v 1.9 2001/10/07 20:30:41 eeh Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 2003 Henric Jungheim
! 6: * Copyright (c) 1999 Matthew R. Green
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. The name of the author may not be used to endorse or promote products
! 18: * derived from this software without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 21: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 22: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 23: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 24: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
! 25: * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
! 26: * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
! 27: * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
! 28: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: */
! 32:
! 33: #ifndef _SPARC64_DEV_IOMMUVAR_H_
! 34: #define _SPARC64_DEV_IOMMUVAR_H_
! 35:
! 36: #ifndef _SYS_TREE_H_
! 37: #include <sys/tree.h>
! 38: #endif
! 39:
! 40: /*
! 41: * per-Streaming Buffer state
! 42: */
! 43: struct strbuf_ctl {
! 44: bus_space_tag_t sb_bustag; /* streaming buffer registers */
! 45: bus_space_handle_t sb_sb; /* Handle for our regs */
! 46: struct iommu_state *sb_iommu; /* Associated IOMMU */
! 47: /*
! 48: * Since implementing the per-map IOMMU state, these per-STC
! 49: * flush areas are not used other than as a boolean flag to indicate
! 50: * the presence of a working and enabled STC. For inconsistency's
! 51: * sake, the "sb" pointers of iommu_state are sometimes used for the
! 52: * same purpose. This should be consolidated.
! 53: */
! 54: paddr_t sb_flushpa; /* to flush streaming buffers */
! 55: volatile int64_t *sb_flush;
! 56: };
! 57:
! 58: /*
! 59: * per-map STC flush area
! 60: */
! 61: struct strbuf_flush {
! 62: char sbf_area[0x80]; /* Holds 64-byte long/aligned buffer */
! 63: void *sbf_flush; /* Kernel virtual address of buffer */
! 64: paddr_t sbf_flushpa; /* Physical address of buffer area */
! 65: };
! 66:
! 67: /*
! 68: * per-map DVMA page table
! 69: */
! 70: struct iommu_page_entry {
! 71: SPLAY_ENTRY(iommu_page_entry) ipe_node;
! 72: paddr_t ipe_pa;
! 73: vaddr_t ipe_va;
! 74: };
! 75: struct iommu_page_map {
! 76: SPLAY_HEAD(iommu_page_tree, iommu_page_entry) ipm_tree;
! 77: int ipm_maxpage; /* Size of allocated page map */
! 78: int ipm_pagecnt; /* Number of entries in use */
! 79: struct iommu_page_entry ipm_map[1];
! 80: };
! 81:
! 82: /*
! 83: * per-map IOMMU state
! 84: *
! 85: * This is what bus_dvmamap_t'c _dm_cookie should be pointing to.
! 86: */
! 87: struct iommu_map_state {
! 88: struct strbuf_flush ims_flush; /* flush should be first (alignment) */
! 89: struct strbuf_ctl *ims_sb; /* Link to parent */
! 90: int ims_flags;
! 91: struct iommu_page_map ims_map; /* map must be last (array at end) */
! 92: };
! 93: #define IOMMU_MAP_STREAM 1
! 94:
! 95: /*
! 96: * per-IOMMU state
! 97: */
! 98: struct iommu_state {
! 99: paddr_t is_ptsb; /* TSB physical address */
! 100: int64_t *is_tsb; /* TSB virtual address */
! 101: int is_tsbsize; /* 0 = 8K, ... */
! 102: u_int is_dvmabase;
! 103: u_int is_dvmaend;
! 104: int64_t is_cr; /* Control register value */
! 105: struct extent *is_dvmamap; /* DVMA map for this instance */
! 106:
! 107: struct strbuf_ctl *is_sb[2]; /* Streaming buffers if any */
! 108:
! 109: /* copies of our parents state, to allow us to be self contained */
! 110: bus_space_tag_t is_bustag; /* our bus tag */
! 111: bus_space_handle_t is_iommu; /* IOMMU registers */
! 112: };
! 113:
! 114: /* interfaces for PCI/SBus code */
! 115: void iommu_init(char *, struct iommu_state *, int, u_int32_t);
! 116: void iommu_reset(struct iommu_state *);
! 117: paddr_t iommu_extract(struct iommu_state *, vaddr_t);
! 118: int64_t iommu_lookup_tte(struct iommu_state *, vaddr_t);
! 119: int64_t iommu_fetch_tte(struct iommu_state *, paddr_t);
! 120: /* bus_dma_tag_t implementation functions */
! 121: int iommu_dvmamap_create(bus_dma_tag_t, bus_dma_tag_t, struct strbuf_ctl *,
! 122: bus_size_t, int, bus_size_t, bus_size_t, int, bus_dmamap_t *);
! 123: void iommu_dvmamap_destroy(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t);
! 124: int iommu_dvmamap_load(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t, void *,
! 125: bus_size_t, struct proc *, int);
! 126: void iommu_dvmamap_unload(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t);
! 127: int iommu_dvmamap_load_raw(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
! 128: bus_dma_segment_t *, int, bus_size_t, int);
! 129: void iommu_dvmamap_sync(bus_dma_tag_t, bus_dma_tag_t, bus_dmamap_t,
! 130: bus_addr_t, bus_size_t, int);
! 131: int iommu_dvmamem_alloc(bus_dma_tag_t, bus_dma_tag_t, bus_size_t,
! 132: bus_size_t, bus_size_t, bus_dma_segment_t *, int, int *, int);
! 133: void iommu_dvmamem_free(bus_dma_tag_t, bus_dma_tag_t, bus_dma_segment_t *,
! 134: int);
! 135: int iommu_dvmamem_map(bus_dma_tag_t, bus_dma_tag_t, bus_dma_segment_t *,
! 136: int, size_t, caddr_t *, int);
! 137: void iommu_dvmamem_unmap(bus_dma_tag_t, bus_dma_tag_t, caddr_t, size_t);
! 138:
! 139: #define IOMMUREG_READ(is, reg) \
! 140: bus_space_read_8((is)->is_bustag, \
! 141: (is)->is_iommu, \
! 142: IOMMUREG(reg))
! 143:
! 144: #define IOMMUREG_WRITE(is, reg, v) \
! 145: bus_space_write_8((is)->is_bustag, \
! 146: (is)->is_iommu, \
! 147: IOMMUREG(reg), \
! 148: (v))
! 149:
! 150: #endif /* _SPARC64_DEV_IOMMUVAR_H_ */
! 151:
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