1 /* $NetBSD: hyperv_common.c,v 1.6 2022/05/20 13:55:17 nonaka 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 1.6 2022/05/20 13:55:17 nonaka 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 u_int hyperv_ver_major; 46 hyperv_tc64_t hyperv_tc64; 47 48 int hyperv_nullop(void); 49 void hyperv_voidop(void); 50 uint64_t hyperv_hypercall_error(uint64_t, paddr_t, paddr_t); 51 52 __weak_alias(hyperv_hypercall, hyperv_hypercall_error); 53 __weak_alias(hyperv_hypercall_enabled, hyperv_nullop); 54 __weak_alias(hyperv_synic_supported, hyperv_nullop); 55 __weak_alias(hyperv_is_gen1, hyperv_nullop); 56 __weak_alias(hyperv_set_event_proc, hyperv_voidop); 57 __weak_alias(hyperv_set_message_proc, hyperv_voidop); 58 __weak_alias(hyperv_send_eom, hyperv_voidop); 59 __weak_alias(hyperv_intr, hyperv_voidop); 60 __weak_alias(hyperv_get_vcpuid, hyperv_nullop); 61 __weak_alias(vmbus_init_interrupts_md, hyperv_voidop); 62 __weak_alias(vmbus_deinit_interrupts_md, hyperv_voidop); 63 __weak_alias(vmbus_init_synic_md, hyperv_voidop); 64 __weak_alias(vmbus_deinit_synic_md, hyperv_voidop); 65 66 int 67 hyperv_nullop(void) 68 { 69 return 0; 70 } 71 72 void 73 hyperv_voidop(void) 74 { 75 } 76 77 uint64_t 78 hyperv_hypercall_error(uint64_t control, paddr_t in_paddr, paddr_t out_paddr) 79 { 80 return ~HYPERCALL_STATUS_SUCCESS; 81 } 82 83 uint64_t 84 hyperv_hypercall_post_message(paddr_t msg) 85 { 86 87 return hyperv_hypercall(HYPERCALL_POST_MESSAGE, msg, 0); 88 } 89 90 uint64_t 91 hyperv_hypercall_signal_event(paddr_t monprm) 92 { 93 94 return hyperv_hypercall(HYPERCALL_SIGNAL_EVENT, monprm, 0); 95 } 96 97 int 98 hyperv_guid2str(const struct hyperv_guid *guid, char *buf, size_t sz) 99 { 100 const uint8_t *d = guid->hv_guid; 101 102 return snprintf(buf, sz, "%02x%02x%02x%02x-" 103 "%02x%02x-%02x%02x-%02x%02x-" 104 "%02x%02x%02x%02x%02x%02x", 105 d[3], d[2], d[1], d[0], 106 d[5], d[4], d[7], d[6], d[8], d[9], 107 d[10], d[11], d[12], d[13], d[14], d[15]); 108 } 109 110 /* 111 * Hyper-V bus_dma utilities. 112 */ 113 void * 114 hyperv_dma_alloc(bus_dma_tag_t dmat, struct hyperv_dma *dma, bus_size_t size, 115 bus_size_t alignment, bus_size_t boundary, int nsegs) 116 { 117 int rseg, error; 118 119 KASSERT(dma != NULL); 120 KASSERT(dma->segs == NULL); 121 KASSERT(nsegs > 0); 122 123 dma->segs = kmem_zalloc(sizeof(*dma->segs) * nsegs, KM_SLEEP); 124 dma->nsegs = nsegs; 125 126 error = bus_dmamem_alloc(dmat, size, alignment, boundary, dma->segs, 127 nsegs, &rseg, BUS_DMA_WAITOK); 128 if (error) { 129 printf("%s: bus_dmamem_alloc failed: error=%d\n", 130 __func__, error); 131 goto fail1; 132 } 133 error = bus_dmamem_map(dmat, dma->segs, rseg, size, &dma->addr, 134 BUS_DMA_WAITOK); 135 if (error) { 136 printf("%s: bus_dmamem_map failed: error=%d\n", 137 __func__, error); 138 goto fail2; 139 } 140 error = bus_dmamap_create(dmat, size, rseg, size, boundary, 141 BUS_DMA_WAITOK, &dma->map); 142 if (error) { 143 printf("%s: bus_dmamap_create failed: error=%d\n", 144 __func__, error); 145 goto fail3; 146 } 147 error = bus_dmamap_load(dmat, dma->map, dma->addr, size, NULL, 148 BUS_DMA_READ | BUS_DMA_WRITE | BUS_DMA_WAITOK); 149 if (error) { 150 printf("%s: bus_dmamap_load failed: error=%d\n", 151 __func__, error); 152 goto fail4; 153 } 154 155 memset(dma->addr, 0, dma->map->dm_mapsize); 156 bus_dmamap_sync(dmat, dma->map, 0, dma->map->dm_mapsize, 157 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 158 159 return dma->addr; 160 161 fail4: bus_dmamap_destroy(dmat, dma->map); 162 fail3: bus_dmamem_unmap(dmat, dma->addr, size); 163 dma->addr = NULL; 164 fail2: bus_dmamem_free(dmat, dma->segs, rseg); 165 fail1: kmem_free(dma->segs, sizeof(*dma->segs) * nsegs); 166 dma->segs = NULL; 167 dma->nsegs = 0; 168 return NULL; 169 } 170 171 void 172 hyperv_dma_free(bus_dma_tag_t dmat, struct hyperv_dma *dma) 173 { 174 bus_size_t size = dma->map->dm_mapsize; 175 int rsegs = dma->map->dm_nsegs; 176 177 bus_dmamap_unload(dmat, dma->map); 178 bus_dmamap_destroy(dmat, dma->map); 179 bus_dmamem_unmap(dmat, dma->addr, size); 180 dma->addr = NULL; 181 bus_dmamem_free(dmat, dma->segs, rsegs); 182 kmem_free(dma->segs, sizeof(*dma->segs) * dma->nsegs); 183 dma->segs = NULL; 184 dma->nsegs = 0; 185 } 186
Indexes created Sat Sep 20 22:09:52 GMT 2025