1 /* $NetBSD: iommuvar.h,v 1.26 2023/12/01 06:47:59 thorpej 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef _SPARC64_DEV_IOMMUVAR_H_ 30 #define _SPARC64_DEV_IOMMUVAR_H_ 31 32 #include <sys/vmem.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 register value */ 59 vmem_t *is_dvmamap; /* DVMA map for this instance */ 60 int is_flags; 61 #define IOMMU_FLUSH_CACHE 0x00000001 62 #define IOMMU_TSBSIZE_IN_PTSB 0x00000002 /* PCIe */ 63 #define IOMMU_SYNC_BEFORE_UNMAP 0x00000004 64 65 struct strbuf_ctl *is_sb[2]; /* Streaming buffers if any */ 66 67 /* copies of our parents state, to allow us to be self contained */ 68 bus_space_tag_t is_bustag; /* our bus tag */ 69 bus_space_handle_t is_iommu; /* IOMMU registers */ 70 uint64_t is_devhandle; /* for sun4v hypervisor calls */ 71 }; 72 73 /* interfaces for PCI/SBUS code */ 74 void iommu_init(char *, struct iommu_state *, int, uint32_t); 75 void iommu_reset(struct iommu_state *); 76 paddr_t iommu_extract(struct iommu_state *, vaddr_t); 77 78 int iommu_dvmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t, 79 struct proc *, int); 80 void iommu_dvmamap_unload(bus_dma_tag_t, bus_dmamap_t); 81 int iommu_dvmamap_load_raw(bus_dma_tag_t, bus_dmamap_t, 82 bus_dma_segment_t *, int, bus_size_t, int); 83 void iommu_dvmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t, bus_size_t, 84 int); 85 int iommu_dvmamem_alloc(bus_dma_tag_t, bus_size_t, bus_size_t, bus_size_t, 86 bus_dma_segment_t *, int, int *, int); 87 void iommu_dvmamem_free(bus_dma_tag_t, bus_dma_segment_t *, int); 88 int iommu_dvmamem_map(bus_dma_tag_t, bus_dma_segment_t *, int, size_t, 89 void **, int); 90 void iommu_dvmamem_unmap(bus_dma_tag_t, void *, size_t); 91 92 #endif /* _SPARC64_DEV_IOMMUVAR_H_ */ 93