1 /* $NetBSD: tc_dma_3000_500.c,v 1.15 2009/03/14 15:36:00 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 34 35 __KERNEL_RCSID(0, "$NetBSD: tc_dma_3000_500.c,v 1.15 2009/03/14 15:36:00 dsl Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/kernel.h> 41 #include <sys/malloc.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #define _ALPHA_BUS_DMA_PRIVATE 46 #include <machine/bus.h> 47 48 #include <dev/tc/tcvar.h> 49 #include <alpha/tc/tc_sgmap.h> 50 #include <alpha/tc/tc_dma_3000_500.h> 51 52 struct alpha_bus_dma_tag tc_dmat_sgmap = { 53 NULL, /* _cookie */ 54 0, /* _wbase */ 55 0, /* _wsize */ 56 NULL, /* _next_window */ 57 0, /* _boundary */ 58 NULL, /* _sgmap */ 59 0, /* _pfthresh */ 60 NULL, /* _get_tag */ 61 tc_bus_dmamap_create_sgmap, 62 tc_bus_dmamap_destroy_sgmap, 63 tc_bus_dmamap_load_sgmap, 64 tc_bus_dmamap_load_mbuf_sgmap, 65 tc_bus_dmamap_load_uio_sgmap, 66 tc_bus_dmamap_load_raw_sgmap, 67 tc_bus_dmamap_unload_sgmap, 68 _bus_dmamap_sync, 69 _bus_dmamem_alloc, 70 _bus_dmamem_free, 71 _bus_dmamem_map, 72 _bus_dmamem_unmap, 73 _bus_dmamem_mmap, 74 }; 75 76 struct tc_dma_slot_info { 77 struct alpha_sgmap tdsi_sgmap; /* sgmap for slot */ 78 struct alpha_bus_dma_tag tdsi_dmat; /* dma tag for slot */ 79 }; 80 struct tc_dma_slot_info *tc_dma_slot_info; 81 82 void 83 tc_dma_init_3000_500(int nslots) 84 { 85 extern struct alpha_bus_dma_tag tc_dmat_direct; 86 size_t sisize; 87 int i; 88 89 /* Allocate per-slot DMA info. */ 90 sisize = nslots * sizeof(struct tc_dma_slot_info); 91 tc_dma_slot_info = malloc(sisize, M_DEVBUF, M_NOWAIT); 92 if (tc_dma_slot_info == NULL) 93 panic("tc_dma_init: can't allocate per-slot DMA info"); 94 memset(tc_dma_slot_info, 0, sisize); 95 96 /* Default all slots to direct-mapped. */ 97 for (i = 0; i < nslots; i++) 98 memcpy(&tc_dma_slot_info[i].tdsi_dmat, &tc_dmat_direct, 99 sizeof(tc_dma_slot_info[i].tdsi_dmat)); 100 } 101 102 /* 103 * Return the DMA tag for the given slot. 104 */ 105 bus_dma_tag_t 106 tc_dma_get_tag_3000_500(int slot) 107 { 108 109 return (&tc_dma_slot_info[slot].tdsi_dmat); 110 } 111 112 /* 113 * Create a TurboChannel SGMAP-mapped DMA map. 114 */ 115 int 116 tc_bus_dmamap_create_sgmap(t, size, nsegments, maxsegsz, boundary, 117 flags, dmamp) 118 bus_dma_tag_t t; 119 bus_size_t size; 120 int nsegments; 121 bus_size_t maxsegsz; 122 bus_size_t boundary; 123 int flags; 124 bus_dmamap_t *dmamp; 125 { 126 bus_dmamap_t map; 127 int error; 128 129 error = _bus_dmamap_create(t, size, nsegments, maxsegsz, 130 boundary, flags, dmamp); 131 if (error) 132 return (error); 133 134 map = *dmamp; 135 136 /* XXX BUS_DMA_ALLOCNOW */ 137 138 return (error); 139 } 140 141 /* 142 * Destroy a TurboChannel SGMAP-mapped DMA map. 143 */ 144 void 145 tc_bus_dmamap_destroy_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 146 { 147 148 KASSERT(map->dm_mapsize == 0); 149 150 _bus_dmamap_destroy(t, map); 151 } 152 153 /* 154 * Load a TurboChannel SGMAP-mapped DMA map with a linear buffer. 155 */ 156 int 157 tc_bus_dmamap_load_sgmap(bus_dma_tag_t t, bus_dmamap_t map, void *buf, bus_size_t buflen, struct proc *p, int flags) 158 { 159 struct tc_dma_slot_info *tdsi = t->_cookie; 160 161 return (tc_sgmap_load(t, map, buf, buflen, p, flags, 162 &tdsi->tdsi_sgmap)); 163 } 164 165 /* 166 * Load a TurboChannel SGMAP-mapped DMA map with an mbuf chain. 167 */ 168 int 169 tc_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t t, bus_dmamap_t map, struct mbuf *m, int flags) 170 { 171 struct tc_dma_slot_info *tdsi = t->_cookie; 172 173 return (tc_sgmap_load_mbuf(t, map, m, flags, &tdsi->tdsi_sgmap)); 174 } 175 176 /* 177 * Load a TurboChannel SGMAP-mapped DMA map with a uio. 178 */ 179 int 180 tc_bus_dmamap_load_uio_sgmap(bus_dma_tag_t t, bus_dmamap_t map, struct uio *uio, int flags) 181 { 182 struct tc_dma_slot_info *tdsi = t->_cookie; 183 184 return (tc_sgmap_load_uio(t, map, uio, flags, &tdsi->tdsi_sgmap)); 185 } 186 187 /* 188 * Load a TurboChannel SGMAP-mapped DMA map with raw memory. 189 */ 190 int 191 tc_bus_dmamap_load_raw_sgmap(bus_dma_tag_t t, bus_dmamap_t map, bus_dma_segment_t *segs, int nsegs, bus_size_t size, int flags) 192 { 193 struct tc_dma_slot_info *tdsi = t->_cookie; 194 195 return (tc_sgmap_load_raw(t, map, segs, nsegs, size, flags, 196 &tdsi->tdsi_sgmap)); 197 } 198 199 /* 200 * Unload a TurboChannel SGMAP-mapped DMA map. 201 */ 202 void 203 tc_bus_dmamap_unload_sgmap(bus_dma_tag_t t, bus_dmamap_t map) 204 { 205 struct tc_dma_slot_info *tdsi = t->_cookie; 206 207 /* 208 * Invalidate any SGMAP page table entries used by this 209 * mapping. 210 */ 211 tc_sgmap_unload(t, map, &tdsi->tdsi_sgmap); 212 213 /* 214 * Do the generic bits of the unload. 215 */ 216 _bus_dmamap_unload(t, map); 217 } 218