hyperv_common.c revision 1.2
1 /* $NetBSD: hyperv_common.c,v 1.2 2019/05/31 04:23:19 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 1.2 2019/05/31 04:23:19 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 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(vmbus_init_interrupts_md, hyperv_voidop); 60 __weak_alias(vmbus_deinit_interrupts_md, hyperv_voidop); 61 __weak_alias(vmbus_init_synic_md, hyperv_voidop); 62 __weak_alias(vmbus_deinit_synic_md, hyperv_voidop); 63 64 int 65 hyperv_nullop(void) 66 { 67 return 0; 68 } 69 70 void 71 hyperv_voidop(void) 72 { 73 } 74 75 uint64_t 76 hyperv_hypercall_error(uint64_t control, paddr_t in_paddr, paddr_t out_paddr) 77 { 78 return ~HYPERCALL_STATUS_SUCCESS; 79 } 80 81 uint64_t 82 hyperv_hypercall_post_message(paddr_t msg) 83 { 84 85 return hyperv_hypercall(HYPERCALL_POST_MESSAGE, msg, 0); 86 } 87 88 uint64_t 89 hyperv_hypercall_signal_event(paddr_t monprm) 90 { 91 92 return hyperv_hypercall(HYPERCALL_SIGNAL_EVENT, monprm, 0); 93 } 94 95 int 96 hyperv_guid2str(const struct hyperv_guid *guid, char *buf, size_t sz) 97 { 98 const uint8_t *d = guid->hv_guid; 99 100 return snprintf(buf, sz, "%02x%02x%02x%02x-" 101 "%02x%02x-%02x%02x-%02x%02x-" 102 "%02x%02x%02x%02x%02x%02x", 103 d[3], d[2], d[1], d[0], 104 d[5], d[4], d[7], d[6], d[8], d[9], 105 d[10], d[11], d[12], d[13], d[14], d[15]); 106 } 107 108 /* 109 * Hyper-V bus_dma utilities. 110 */ 111 void * 112 hyperv_dma_alloc(bus_dma_tag_t dmat, struct hyperv_dma *dma, bus_size_t size, 113 bus_size_t alignment, bus_size_t boundary, int nsegs) 114 { 115 const int kmemflags = cold ? KM_NOSLEEP : KM_SLEEP; 116 const int dmaflags = cold ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK; 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, kmemflags); 124 if (dma->segs == NULL) 125 return NULL; 126 127 dma->nsegs = nsegs; 128 129 error = bus_dmamem_alloc(dmat, size, alignment, boundary, dma->segs, 130 nsegs, &rseg, dmaflags); 131 if (error) { 132 printf("%s: bus_dmamem_alloc failed: error=%d\n", 133 __func__, error); 134 goto fail1; 135 } 136 error = bus_dmamem_map(dmat, dma->segs, rseg, size, &dma->addr, 137 dmaflags); 138 if (error) { 139 printf("%s: bus_dmamem_map failed: error=%d\n", 140 __func__, error); 141 goto fail2; 142 } 143 error = bus_dmamap_create(dmat, size, rseg, size, boundary, dmaflags, 144 &dma->map); 145 if (error) { 146 printf("%s: bus_dmamap_create failed: error=%d\n", 147 __func__, error); 148 goto fail3; 149 } 150 error = bus_dmamap_load(dmat, dma->map, dma->addr, size, NULL, 151 BUS_DMA_READ | BUS_DMA_WRITE | dmaflags); 152 if (error) { 153 printf("%s: bus_dmamap_load failed: error=%d\n", 154 __func__, error); 155 goto fail4; 156 } 157 158 return dma->addr; 159 160 fail4: bus_dmamap_destroy(dmat, dma->map); 161 fail3: bus_dmamem_unmap(dmat, dma->addr, size); 162 dma->addr = NULL; 163 fail2: bus_dmamem_free(dmat, dma->segs, rseg); 164 fail1: kmem_free(dma->segs, sizeof(*dma->segs) * nsegs); 165 dma->segs = NULL; 166 dma->nsegs = 0; 167 return NULL; 168 } 169 170 void 171 hyperv_dma_free(bus_dma_tag_t dmat, struct hyperv_dma *dma) 172 { 173 bus_size_t size = dma->map->dm_mapsize; 174 int rsegs = dma->map->dm_nsegs; 175 176 bus_dmamap_unload(dmat, dma->map); 177 bus_dmamap_destroy(dmat, dma->map); 178 bus_dmamem_unmap(dmat, dma->addr, size); 179 dma->addr = NULL; 180 bus_dmamem_free(dmat, dma->segs, rsegs); 181 kmem_free(dma->segs, sizeof(*dma->segs) * dma->nsegs); 182 dma->segs = NULL; 183 dma->nsegs = 0; 184 } 185
Indexes created Mon Sep 22 05:09:51 GMT 2025