1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1997, 1998 Justin T. Gibbs. 5 * Copyright (c) 2013 The FreeBSD Foundation 6 * All rights reserved. 7 * 8 * This software was developed by Konstantin Belousov <kib@FreeBSD.org> 9 * under sponsorship from the FreeBSD Foundation. 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 * without modification, immediately at the beginning of the file. 17 * 2. 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 AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 24 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, 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 #include <sys/cdefs.h> 34 #include "opt_acpi.h" 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/malloc.h> 39 #include <sys/bus.h> 40 #include <sys/kernel.h> 41 #include <sys/ktr.h> 42 #include <sys/lock.h> 43 #include <sys/memdesc.h> 44 #include <sys/mutex.h> 45 #include <sys/uio.h> 46 #include <sys/vmmeter.h> 47 #include <vm/vm.h> 48 #include <vm/vm_extern.h> 49 #include <vm/vm_param.h> 50 #include <vm/vm_page.h> 51 #include <vm/vm_phys.h> 52 #include <vm/pmap.h> 53 #include <machine/bus.h> 54 #include <x86/include/busdma_impl.h> 55 56 int 57 common_bus_dma_tag_create(struct bus_dma_tag_common *parent, 58 bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr, 59 bus_addr_t highaddr, bus_size_t maxsize, int nsegments, bus_size_t maxsegsz, 60 int flags, bus_dma_lock_t *lockfunc, void *lockfuncarg, size_t sz, 61 void **dmat) 62 { 63 void *newtag; 64 struct bus_dma_tag_common *common; 65 66 KASSERT(sz >= sizeof(struct bus_dma_tag_common), ("sz")); 67 /* Basic sanity checking */ 68 if (boundary != 0 && boundary < maxsegsz) 69 maxsegsz = boundary; 70 if (maxsegsz == 0) 71 return (EINVAL); 72 /* Return a NULL tag on failure */ 73 *dmat = NULL; 74 75 newtag = malloc(sz, M_DEVBUF, M_ZERO | M_NOWAIT); 76 if (newtag == NULL) { 77 CTR4(KTR_BUSDMA, "%s returned tag %p tag flags 0x%x error %d", 78 __func__, newtag, 0, ENOMEM); 79 return (ENOMEM); 80 } 81 82 common = newtag; 83 common->impl = &bus_dma_bounce_impl; 84 common->alignment = alignment; 85 common->boundary = boundary; 86 common->lowaddr = trunc_page((vm_paddr_t)lowaddr) + (PAGE_SIZE - 1); 87 common->highaddr = trunc_page((vm_paddr_t)highaddr) + (PAGE_SIZE - 1); 88 common->maxsize = maxsize; 89 common->nsegments = nsegments; 90 common->maxsegsz = maxsegsz; 91 common->flags = flags; 92 if (lockfunc != NULL) { 93 common->lockfunc = lockfunc; 94 common->lockfuncarg = lockfuncarg; 95 } else { 96 common->lockfunc = _busdma_dflt_lock; 97 common->lockfuncarg = NULL; 98 } 99 100 /* Take into account any restrictions imposed by our parent tag */ 101 if (parent != NULL) { 102 common->impl = parent->impl; 103 common->lowaddr = MIN(parent->lowaddr, common->lowaddr); 104 common->highaddr = MAX(parent->highaddr, common->highaddr); 105 if (common->boundary == 0) 106 common->boundary = parent->boundary; 107 else if (parent->boundary != 0) { 108 common->boundary = MIN(parent->boundary, 109 common->boundary); 110 } 111 112 common->domain = parent->domain; 113 } 114 common->domain = vm_phys_domain_match(common->domain, 0ul, 115 common->lowaddr); 116 *dmat = common; 117 return (0); 118 } 119 120 int 121 bus_dma_tag_set_domain(bus_dma_tag_t dmat, int domain) 122 { 123 struct bus_dma_tag_common *tc; 124 125 tc = (struct bus_dma_tag_common *)dmat; 126 domain = vm_phys_domain_match(domain, 0ul, tc->lowaddr); 127 /* Only call the callback if it changes. */ 128 if (domain == tc->domain) 129 return (0); 130 tc->domain = domain; 131 return (tc->impl->tag_set_domain(dmat)); 132 } 133 134 /* 135 * Allocate a device specific dma_tag. 136 */ 137 int 138 bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment, 139 bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr, 140 bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize, 141 int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc, 142 void *lockfuncarg, bus_dma_tag_t *dmat) 143 { 144 struct bus_dma_tag_common *tc; 145 int error; 146 147 /* Filters are no longer supported. */ 148 if (filter != NULL || filterarg != NULL) 149 return (EINVAL); 150 151 if (parent == NULL) { 152 error = bus_dma_bounce_impl.tag_create(parent, alignment, 153 boundary, lowaddr, highaddr, maxsize, nsegments, maxsegsz, 154 flags, lockfunc, lockfuncarg, dmat); 155 } else { 156 tc = (struct bus_dma_tag_common *)parent; 157 error = tc->impl->tag_create(parent, alignment, 158 boundary, lowaddr, highaddr, maxsize, nsegments, maxsegsz, 159 flags, lockfunc, lockfuncarg, dmat); 160 } 161 return (error); 162 } 163 164 void 165 bus_dma_template_clone(bus_dma_template_t *t, bus_dma_tag_t dmat) 166 { 167 struct bus_dma_tag_common *common; 168 169 if (t == NULL || dmat == NULL) 170 return; 171 172 common = (struct bus_dma_tag_common *)dmat; 173 174 t->alignment = common->alignment; 175 t->boundary = common->boundary; 176 t->lowaddr = common->lowaddr; 177 t->highaddr = common->highaddr; 178 t->maxsize = common->maxsize; 179 t->nsegments = common->nsegments; 180 t->maxsegsize = common->maxsegsz; 181 t->flags = common->flags; 182 t->lockfunc = common->lockfunc; 183 t->lockfuncarg = common->lockfuncarg; 184 } 185 186 int 187 bus_dma_tag_destroy(bus_dma_tag_t dmat) 188 { 189 struct bus_dma_tag_common *tc; 190 191 tc = (struct bus_dma_tag_common *)dmat; 192 return (tc->impl->tag_destroy(dmat)); 193 } 194