1 /* $OpenBSD: tc_dma_3000_500.c,v 1.7 2017/10/29 08:50:43 mpi Exp $ */ 2 /* $NetBSD: tc_dma_3000_500.c,v 1.13 2001/07/19 06:40:03 thorpej Exp $ */ 3 4 /*- 5 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 * NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #define _ALPHA_BUS_DMA_PRIVATE 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/device.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 42 #include <uvm/uvm_extern.h> 43 44 #include <machine/alpha_cpu.h> 45 #include <machine/bus.h> 46 47 #include <dev/tc/tcvar.h> 48 #include <alpha/tc/tc_conf.h> 49 #include <alpha/tc/tc_3000_500.h> 50 #include <alpha/tc/tc_sgmap.h> 51 #include <alpha/tc/tc_dma_3000_500.h> 52 53 #define KV(x) (ALPHA_PHYS_TO_K0SEG(x)) 54 55 struct alpha_sgmap tc_dma_sgmap; /* sgmap shared by all slots */ 56 57 struct alpha_bus_dma_tag tc_dmat_sgmap = { 58 NULL, /* _cookie, not used */ 59 0, /* _wbase */ 60 0x1000000, /* _wsize (256MB: 32K entries) */ 61 NULL, /* _next_window */ 62 0, /* _boundary */ 63 &tc_dma_sgmap, /* _sgmap */ 64 NULL, /* _get_tag, not used */ 65 alpha_sgmap_dmamap_create, 66 alpha_sgmap_dmamap_destroy, 67 tc_bus_dmamap_load_sgmap, 68 tc_bus_dmamap_load_mbuf_sgmap, 69 tc_bus_dmamap_load_uio_sgmap, 70 tc_bus_dmamap_load_raw_sgmap, 71 tc_bus_dmamap_unload_sgmap, 72 _bus_dmamap_sync, 73 _bus_dmamem_alloc, 74 _bus_dmamem_free, 75 _bus_dmamem_map, 76 _bus_dmamem_unmap, 77 _bus_dmamem_mmap, 78 }; 79 80 void 81 tc_dma_init_3000_500(nslots) 82 int nslots; 83 { 84 int i; 85 struct alpha_bus_dma_tag *t; 86 87 for (i = 0; i < nslots; i++) { 88 /* 89 * Note that the use of sgmap on a slot is global, so we 90 * can not afford reverting to direct dma (by making 91 * _next_window point to the direct tag). 92 * On the other hand, the sgmap allows for 256MB of 93 * DMA transfers being programmed at the same time for all 94 * the slots, which should not be a liability. 95 */ 96 tc_3000_500_ioslot(i, IOSLOT_S, !0); 97 } 98 /* 99 * The TURBOchannel sgmap is shared by all slots. 100 * We need a valid bus_dma_tag_t to pass alpha_sgmap_init() in order 101 * to allocate the sgmap fill page, so pick the first. 102 */ 103 t = &tc_dmat_sgmap; 104 alpha_sgmap_init(t, t->_sgmap, "tc_sgmap", 105 t->_wbase, 0, t->_wsize, 106 SGMAP_PTE_SPACING * sizeof(SGMAP_PTE_TYPE), 107 (void *)TC_3000_500_SCMAP, 0); 108 } 109 110 /* 111 * Return the DMA tag for the given slot. 112 */ 113 bus_dma_tag_t 114 tc_dma_get_tag_3000_500(slot) 115 int slot; 116 { 117 return &tc_dmat_sgmap; 118 } 119 120 /* 121 * Load a TURBOchannel SGMAP-mapped DMA map with a linear buffer. 122 */ 123 int 124 tc_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags) 125 bus_dma_tag_t t; 126 bus_dmamap_t map; 127 void *buf; 128 bus_size_t buflen; 129 struct proc *p; 130 int flags; 131 { 132 return (tc_sgmap_load(t, map, buf, buflen, p, flags, t->_sgmap)); 133 } 134 135 /* 136 * Load a TURBOchannel SGMAP-mapped DMA map with an mbuf chain. 137 */ 138 int 139 tc_bus_dmamap_load_mbuf_sgmap(t, map, m, flags) 140 bus_dma_tag_t t; 141 bus_dmamap_t map; 142 struct mbuf *m; 143 int flags; 144 { 145 return (tc_sgmap_load_mbuf(t, map, m, flags, t->_sgmap)); 146 } 147 148 /* 149 * Load a TURBOchannel SGMAP-mapped DMA map with a uio. 150 */ 151 int 152 tc_bus_dmamap_load_uio_sgmap(t, map, uio, flags) 153 bus_dma_tag_t t; 154 bus_dmamap_t map; 155 struct uio *uio; 156 int flags; 157 { 158 return (tc_sgmap_load_uio(t, map, uio, flags, t->_sgmap)); 159 } 160 161 /* 162 * Load a TURBOchannel SGMAP-mapped DMA map with raw memory. 163 */ 164 int 165 tc_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags) 166 bus_dma_tag_t t; 167 bus_dmamap_t map; 168 bus_dma_segment_t *segs; 169 int nsegs; 170 bus_size_t size; 171 int flags; 172 { 173 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, t->_sgmap)); 174 } 175 176 /* 177 * Unload a TURBOchannel SGMAP-mapped DMA map. 178 */ 179 void 180 tc_bus_dmamap_unload_sgmap(t, map) 181 bus_dma_tag_t t; 182 bus_dmamap_t map; 183 { 184 /* 185 * Invalidate any SGMAP page table entries used by this 186 * mapping. 187 */ 188 tc_sgmap_unload(t, map, t->_sgmap); 189 190 /* 191 * Do the generic bits of the unload. 192 */ 193 _bus_dmamap_unload(t, map); 194 } 195