hyperv_common.c revision 1.2.2.3
1 /* $NetBSD: hyperv_common.c,v 1.2.2.3 2020/04/08 14:08:05 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2009-2012,2016-2017 Microsoft Corp. 5 * Copyright (c) 2012 NetApp Inc. 6 * Copyright (c) 2012 Citrix Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice unmodified, this list of conditions, and the following 14 * disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: hyperv_common.c,v 1.2.2.3 2020/04/08 14:08:05 martin Exp $"); 33 34 #include "hyperv.h" 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/bus.h> 40 #include <sys/kmem.h> 41 42 #include <dev/hyperv/hypervreg.h> 43 #include <dev/hyperv/hypervvar.h> 44 45 hyperv_tc64_t hyperv_tc64; 46 47 int hyperv_nullop(void); 48 void hyperv_voidop(void); 49 uint64_t hyperv_hypercall_error(uint64_t, paddr_t, paddr_t); 50 51 __weak_alias(hyperv_hypercall, hyperv_hypercall_error); 52 __weak_alias(hyperv_hypercall_enabled, hyperv_nullop); 53 __weak_alias(hyperv_synic_supported, hyperv_nullop); 54 __weak_alias(hyperv_is_gen1, hyperv_nullop); 55 __weak_alias(hyperv_set_event_proc, hyperv_voidop); 56 __weak_alias(hyperv_set_message_proc, hyperv_voidop); 57 __weak_alias(hyperv_send_eom, hyperv_voidop); 58 __weak_alias(hyperv_intr, hyperv_voidop); 59 __weak_alias(hyperv_get_vcpuid, hyperv_nullop); 60 __weak_alias(vmbus_init_interrupts_md, hyperv_voidop); 61 __weak_alias(vmbus_deinit_interrupts_md, hyperv_voidop); 62 __weak_alias(vmbus_init_synic_md, hyperv_voidop); 63 __weak_alias(vmbus_deinit_synic_md, hyperv_voidop); 64 65 int 66 hyperv_nullop(void) 67 { 68 return 0; 69 } 70 71 void 72 hyperv_voidop(void) 73 { 74 } 75 76 uint64_t 77 hyperv_hypercall_error(uint64_t control, paddr_t in_paddr, paddr_t out_paddr) 78 { 79 return ~HYPERCALL_STATUS_SUCCESS; 80 } 81 82 uint64_t 83 hyperv_hypercall_post_message(paddr_t msg) 84 { 85 86 return hyperv_hypercall(HYPERCALL_POST_MESSAGE, msg, 0); 87 } 88 89 uint64_t 90 hyperv_hypercall_signal_event(paddr_t monprm) 91 { 92 93 return hyperv_hypercall(HYPERCALL_SIGNAL_EVENT, monprm, 0); 94 } 95 96 int 97 hyperv_guid2str(const struct hyperv_guid *guid, char *buf, size_t sz) 98 { 99 const uint8_t *d = guid->hv_guid; 100 101 return snprintf(buf, sz, "%02x%02x%02x%02x-" 102 "%02x%02x-%02x%02x-%02x%02x-" 103 "%02x%02x%02x%02x%02x%02x", 104 d[3], d[2], d[1], d[0], 105 d[5], d[4], d[7], d[6], d[8], d[9], 106 d[10], d[11], d[12], d[13], d[14], d[15]); 107 } 108 109 /* 110 * Hyper-V bus_dma utilities. 111 */ 112 void * 113 hyperv_dma_alloc(bus_dma_tag_t dmat, struct hyperv_dma *dma, bus_size_t size, 114 bus_size_t alignment, bus_size_t boundary, int nsegs, int flags) 115 { 116 const int waitok = (flags & HYPERV_DMA_NOSLEEP) != HYPERV_DMA_NOSLEEP; 117 const int kmemflags = waitok ? KM_SLEEP: KM_NOSLEEP; 118 const int dmaflags = waitok ? BUS_DMA_WAITOK : BUS_DMA_NOWAIT; 119 int rseg, error; 120 121 KASSERT(dma != NULL); 122 KASSERT(dma->segs == NULL); 123 KASSERT(nsegs > 0); 124 125 dma->segs = kmem_intr_zalloc(sizeof(*dma->segs) * nsegs, kmemflags); 126 if (dma->segs == NULL) 127 return NULL; 128 129 dma->nsegs = nsegs; 130 131 error = bus_dmamem_alloc(dmat, size, alignment, boundary, dma->segs, 132 nsegs, &rseg, dmaflags); 133 if (error) { 134 printf("%s: bus_dmamem_alloc failed: error=%d\n", 135 __func__, error); 136 goto fail1; 137 } 138 error = bus_dmamem_map(dmat, dma->segs, rseg, size, &dma->addr, 139 dmaflags); 140 if (error) { 141 printf("%s: bus_dmamem_map failed: error=%d\n", 142 __func__, error); 143 goto fail2; 144 } 145 error = bus_dmamap_create(dmat, size, rseg, size, boundary, dmaflags, 146 &dma->map); 147 if (error) { 148 printf("%s: bus_dmamap_create failed: error=%d\n", 149 __func__, error); 150 goto fail3; 151 } 152 error = bus_dmamap_load(dmat, dma->map, dma->addr, size, NULL, 153 BUS_DMA_READ | BUS_DMA_WRITE | dmaflags); 154 if (error) { 155 printf("%s: bus_dmamap_load failed: error=%d\n", 156 __func__, error); 157 goto fail4; 158 } 159 160 memset(dma->addr, 0, dma->map->dm_mapsize); 161 bus_dmamap_sync(dmat, dma->map, 0, dma->map->dm_mapsize, 162 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 163 164 return dma->addr; 165 166 fail4: bus_dmamap_destroy(dmat, dma->map); 167 fail3: bus_dmamem_unmap(dmat, dma->addr, size); 168 dma->addr = NULL; 169 fail2: bus_dmamem_free(dmat, dma->segs, rseg); 170 fail1: kmem_free(dma->segs, sizeof(*dma->segs) * nsegs); 171 dma->segs = NULL; 172 dma->nsegs = 0; 173 return NULL; 174 } 175 176 void 177 hyperv_dma_free(bus_dma_tag_t dmat, struct hyperv_dma *dma) 178 { 179 bus_size_t size = dma->map->dm_mapsize; 180 int rsegs = dma->map->dm_nsegs; 181 182 bus_dmamap_unload(dmat, dma->map); 183 bus_dmamap_destroy(dmat, dma->map); 184 bus_dmamem_unmap(dmat, dma->addr, size); 185 dma->addr = NULL; 186 bus_dmamem_free(dmat, dma->segs, rsegs); 187 kmem_free(dma->segs, sizeof(*dma->segs) * dma->nsegs); 188 dma->segs = NULL; 189 dma->nsegs = 0; 190 } 191
Indexes created Thu Sep 25 16:09:42 GMT 2025