1 /* $NetBSD: iommuvar.h,v 1.12 2002/06/20 18:26:24 eeh Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #ifndef _SPARC64_DEV_IOMMUVAR_H_ 32 #define _SPARC64_DEV_IOMMUVAR_H_ 33 34 /* 35 * Streaming buffer control 36 * 37 * It's easy to deal w/sysio since it has a single streaming buffer, and 38 * flushes are done on 8-byte boundaries. But psycho is a pain since it 39 * has two streaming buffers and the streaming buffer flush dumps 64 bytes 40 * of data. 41 */ 42 struct strbuf_ctl { 43 struct iommu_state *sb_is; /* Pointer to our iommu */ 44 bus_space_handle_t sb_sb; /* Handle for our regs */ 45 paddr_t sb_flushpa; /* to flush streaming buffers */ 46 volatile int64_t *sb_flush; 47 }; 48 49 /* 50 * per-IOMMU state 51 */ 52 struct iommu_state { 53 paddr_t is_ptsb; /* TSB physical address */ 54 int64_t *is_tsb; /* TSB virtual address */ 55 int is_tsbsize; /* 0 = 8K, ... */ 56 u_int is_dvmabase; 57 u_int is_dvmaend; 58 int64_t is_cr; /* IOMMU control regiter value */ 59 struct extent *is_dvmamap; /* DVMA map for this instance */ 60 61 struct strbuf_ctl *is_sb[2]; /* Streaming buffers if any */ 62 63 /* copies of our parents state, to allow us to be self contained */ 64 bus_space_tag_t is_bustag; /* our bus tag */ 65 bus_space_handle_t is_iommu; /* IOMMU registers */ 66 }; 67 68 /* interfaces for PCI/SBUS code */ 69 void iommu_init __P((char *, struct iommu_state *, int, u_int32_t)); 70 void iommu_reset __P((struct iommu_state *)); 71 void iommu_enter __P((struct strbuf_ctl *, vaddr_t, int64_t, int)); 72 void iommu_remove __P((struct iommu_state *, vaddr_t, size_t)); 73 paddr_t iommu_extract __P((struct iommu_state *, vaddr_t)); 74 75 int iommu_dvmamap_load __P((bus_dma_tag_t, struct strbuf_ctl *, 76 bus_dmamap_t, void *, bus_size_t, struct proc *, int)); 77 void iommu_dvmamap_unload __P((bus_dma_tag_t, struct strbuf_ctl *, 78 bus_dmamap_t)); 79 int iommu_dvmamap_load_raw __P((bus_dma_tag_t, struct strbuf_ctl *, 80 bus_dmamap_t, bus_dma_segment_t *, int, int, bus_size_t)); 81 void iommu_dvmamap_sync __P((bus_dma_tag_t, struct strbuf_ctl *, 82 bus_dmamap_t, bus_addr_t, bus_size_t, int)); 83 int iommu_dvmamem_alloc __P((bus_dma_tag_t, struct strbuf_ctl *, 84 bus_size_t, bus_size_t, bus_size_t, bus_dma_segment_t *, 85 int, int *, int)); 86 void iommu_dvmamem_free __P((bus_dma_tag_t, struct strbuf_ctl *, 87 bus_dma_segment_t *, int)); 88 int iommu_dvmamem_map __P((bus_dma_tag_t, struct strbuf_ctl *, 89 bus_dma_segment_t *, int, size_t, caddr_t *, int)); 90 void iommu_dvmamem_unmap __P((bus_dma_tag_t, struct strbuf_ctl *, 91 caddr_t, size_t)); 92 93 #endif /* _SPARC64_DEV_IOMMUVAR_H_ */ 94