1 /*- 2 * Copyright (c) 1997, 1998 Justin T. Gibbs. 3 * Copyright (c) 2013, 2015 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * This software was developed by Konstantin Belousov <kib@FreeBSD.org> 7 * under sponsorship from the FreeBSD Foundation. 8 * 9 * Portions of this software were developed by Semihalf 10 * under sponsorship of the FreeBSD Foundation. 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 * without modification, immediately at the beginning of the file. 18 * 2. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 25 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/bus.h> 38 #include <sys/kernel.h> 39 #include <sys/ktr.h> 40 #include <sys/lock.h> 41 #include <sys/memdesc.h> 42 #include <sys/mutex.h> 43 #include <sys/uio.h> 44 #include <vm/vm.h> 45 #include <vm/vm_extern.h> 46 #include <vm/vm_phys.h> 47 #include <vm/pmap.h> 48 49 #include <machine/bus.h> 50 #include <arm64/include/bus_dma_impl.h> 51 52 int 53 common_bus_dma_tag_create(struct bus_dma_tag_common *parent, 54 bus_size_t alignment, bus_addr_t boundary, bus_addr_t lowaddr, 55 bus_addr_t highaddr, bus_size_t maxsize, int nsegments, 56 bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc, 57 void *lockfuncarg, size_t sz, void **dmat) 58 { 59 void *newtag; 60 struct bus_dma_tag_common *common; 61 62 KASSERT(sz >= sizeof(struct bus_dma_tag_common), ("sz")); 63 /* Return a NULL tag on failure */ 64 *dmat = NULL; 65 /* Basic sanity checking */ 66 if (boundary != 0 && boundary < maxsegsz) 67 maxsegsz = boundary; 68 if (maxsegsz == 0) 69 return (EINVAL); 70 71 newtag = malloc(sz, M_DEVBUF, M_ZERO | M_NOWAIT); 72 if (newtag == NULL) { 73 CTR4(KTR_BUSDMA, "%s returned tag %p tag flags 0x%x error %d", 74 __func__, newtag, 0, ENOMEM); 75 return (ENOMEM); 76 } 77 78 common = newtag; 79 common->impl = &bus_dma_bounce_impl; 80 common->alignment = alignment; 81 common->boundary = boundary; 82 common->lowaddr = trunc_page((vm_paddr_t)lowaddr) + (PAGE_SIZE - 1); 83 common->highaddr = trunc_page((vm_paddr_t)highaddr) + (PAGE_SIZE - 1); 84 common->maxsize = maxsize; 85 common->nsegments = nsegments; 86 common->maxsegsz = maxsegsz; 87 common->flags = flags; 88 if (lockfunc != NULL) { 89 common->lockfunc = lockfunc; 90 common->lockfuncarg = lockfuncarg; 91 } else { 92 common->lockfunc = _busdma_dflt_lock; 93 common->lockfuncarg = NULL; 94 } 95 96 /* Take into account any restrictions imposed by our parent tag */ 97 if (parent != NULL) { 98 common->impl = parent->impl; 99 common->lowaddr = MIN(parent->lowaddr, common->lowaddr); 100 common->highaddr = MAX(parent->highaddr, common->highaddr); 101 common->alignment = MAX(parent->alignment, common->alignment); 102 if (common->boundary == 0) 103 common->boundary = parent->boundary; 104 else if (parent->boundary != 0) { 105 common->boundary = MIN(parent->boundary, 106 common->boundary); 107 } 108 109 common->domain = parent->domain; 110 } 111 common->domain = vm_phys_domain_match(common->domain, 0ul, 112 common->lowaddr); 113 *dmat = common; 114 return (0); 115 } 116 117 /* 118 * Allocate a device specific dma_tag. 119 */ 120 int 121 bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment, 122 bus_addr_t boundary, bus_addr_t lowaddr, bus_addr_t highaddr, 123 bus_dma_filter_t *filter, void *filterarg, bus_size_t maxsize, 124 int nsegments, bus_size_t maxsegsz, int flags, bus_dma_lock_t *lockfunc, 125 void *lockfuncarg, bus_dma_tag_t *dmat) 126 { 127 struct bus_dma_tag_common *tc; 128 int error; 129 130 /* Filters are no longer supported. */ 131 if (filter != NULL || filterarg != NULL) 132 return (EINVAL); 133 134 if (parent == NULL) { 135 error = bus_dma_bounce_impl.tag_create(parent, alignment, 136 boundary, lowaddr, highaddr, maxsize, nsegments, maxsegsz, 137 flags, lockfunc, lockfuncarg, dmat); 138 } else { 139 tc = (struct bus_dma_tag_common *)parent; 140 error = tc->impl->tag_create(parent, alignment, 141 boundary, lowaddr, highaddr, maxsize, nsegments, maxsegsz, 142 flags, lockfunc, lockfuncarg, dmat); 143 } 144 return (error); 145 } 146 147 void 148 bus_dma_template_clone(bus_dma_template_t *t, bus_dma_tag_t dmat) 149 { 150 struct bus_dma_tag_common *common; 151 152 if (t == NULL || dmat == NULL) 153 return; 154 155 common = (struct bus_dma_tag_common *)dmat; 156 157 t->alignment = common->alignment; 158 t->boundary = common->boundary; 159 t->lowaddr = common->lowaddr; 160 t->highaddr = common->highaddr; 161 t->maxsize = common->maxsize; 162 t->nsegments = common->nsegments; 163 t->maxsegsize = common->maxsegsz; 164 t->flags = common->flags; 165 t->lockfunc = common->lockfunc; 166 t->lockfuncarg = common->lockfuncarg; 167 } 168 169 int 170 bus_dma_tag_destroy(bus_dma_tag_t dmat) 171 { 172 struct bus_dma_tag_common *tc; 173 174 tc = (struct bus_dma_tag_common *)dmat; 175 return (tc->impl->tag_destroy(dmat)); 176 } 177 178 int 179 bus_dma_tag_set_domain(bus_dma_tag_t dmat, int domain) 180 { 181 struct bus_dma_tag_common *tc; 182 183 tc = (struct bus_dma_tag_common *)dmat; 184 domain = vm_phys_domain_match(domain, 0ul, tc->lowaddr); 185 /* Only call the callback if it changes. */ 186 if (domain == tc->domain) 187 return (0); 188 tc->domain = domain; 189 return (tc->impl->tag_set_domain(dmat)); 190 } 191