| File: | src/usr.sbin/vmd/virtio.c |
| Warning: | line 1562, column 4 Value stored to 'cmd' is never read |
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| 1 | /* $OpenBSD: virtio.c,v 1.97 2021/08/29 18:01:32 dv Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2015 Mike Larkin <mlarkin@openbsd.org> |
| 5 | * |
| 6 | * Permission to use, copy, modify, and distribute this software for any |
| 7 | * purpose with or without fee is hereby granted, provided that the above |
| 8 | * copyright notice and this permission notice appear in all copies. |
| 9 | * |
| 10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 17 | */ |
| 18 | |
| 19 | #include <sys/param.h> /* PAGE_SIZE */ |
| 20 | #include <sys/socket.h> |
| 21 | |
| 22 | #include <machine/vmmvar.h> |
| 23 | #include <dev/pci/pcireg.h> |
| 24 | #include <dev/pci/pcidevs.h> |
| 25 | #include <dev/pv/virtioreg.h> |
| 26 | #include <dev/pci/virtio_pcireg.h> |
| 27 | #include <dev/pv/vioblkreg.h> |
| 28 | #include <dev/pv/vioscsireg.h> |
| 29 | |
| 30 | #include <net/if.h> |
| 31 | #include <netinet/in.h> |
| 32 | #include <netinet/if_ether.h> |
| 33 | #include <netinet/ip.h> |
| 34 | |
| 35 | #include <errno(*__errno()).h> |
| 36 | #include <event.h> |
| 37 | #include <poll.h> |
| 38 | #include <stddef.h> |
| 39 | #include <stdlib.h> |
| 40 | #include <string.h> |
| 41 | #include <unistd.h> |
| 42 | |
| 43 | #include "atomicio.h" |
| 44 | #include "pci.h" |
| 45 | #include "vioscsi.h" |
| 46 | #include "virtio.h" |
| 47 | #include "vmd.h" |
| 48 | #include "vmm.h" |
| 49 | |
| 50 | extern char *__progname; |
| 51 | struct viornd_dev viornd; |
| 52 | struct vioblk_dev *vioblk; |
| 53 | struct vionet_dev *vionet; |
| 54 | struct vioscsi_dev *vioscsi; |
| 55 | struct vmmci_dev vmmci; |
| 56 | |
| 57 | int nr_vionet; |
| 58 | int nr_vioblk; |
| 59 | |
| 60 | #define MAXPHYS(64 * 1024) (64 * 1024) /* max raw I/O transfer size */ |
| 61 | |
| 62 | #define VIRTIO_NET_F_MAC(1<<5) (1<<5) |
| 63 | |
| 64 | #define VMMCI_F_TIMESYNC(1<<0) (1<<0) |
| 65 | #define VMMCI_F_ACK(1<<1) (1<<1) |
| 66 | #define VMMCI_F_SYNCRTC(1<<2) (1<<2) |
| 67 | |
| 68 | #define RXQ0 0 |
| 69 | #define TXQ1 1 |
| 70 | |
| 71 | const char * |
| 72 | vioblk_cmd_name(uint32_t type) |
| 73 | { |
| 74 | switch (type) { |
| 75 | case VIRTIO_BLK_T_IN0: return "read"; |
| 76 | case VIRTIO_BLK_T_OUT1: return "write"; |
| 77 | case VIRTIO_BLK_T_SCSI_CMD2: return "scsi read"; |
| 78 | case VIRTIO_BLK_T_SCSI_CMD_OUT3: return "scsi write"; |
| 79 | case VIRTIO_BLK_T_FLUSH4: return "flush"; |
| 80 | case VIRTIO_BLK_T_FLUSH_OUT5: return "flush out"; |
| 81 | case VIRTIO_BLK_T_GET_ID8: return "get id"; |
| 82 | default: return "unknown"; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | static const char * |
| 87 | virtio_reg_name(uint8_t reg) |
| 88 | { |
| 89 | switch (reg) { |
| 90 | case VIRTIO_CONFIG_DEVICE_FEATURES0: return "device feature"; |
| 91 | case VIRTIO_CONFIG_GUEST_FEATURES4: return "guest feature"; |
| 92 | case VIRTIO_CONFIG_QUEUE_ADDRESS8: return "queue address"; |
| 93 | case VIRTIO_CONFIG_QUEUE_SIZE12: return "queue size"; |
| 94 | case VIRTIO_CONFIG_QUEUE_SELECT14: return "queue select"; |
| 95 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: return "queue notify"; |
| 96 | case VIRTIO_CONFIG_DEVICE_STATUS18: return "device status"; |
| 97 | case VIRTIO_CONFIG_ISR_STATUS19: return "isr status"; |
| 98 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20: return "device config 0"; |
| 99 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 4: return "device config 1"; |
| 100 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 8: return "device config 2"; |
| 101 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 12: return "device config 3"; |
| 102 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 16: return "device config 4"; |
| 103 | default: return "unknown"; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | uint32_t |
| 108 | vring_size(uint32_t vq_size) |
| 109 | { |
| 110 | uint32_t allocsize1, allocsize2; |
| 111 | |
| 112 | /* allocsize1: descriptor table + avail ring + pad */ |
| 113 | allocsize1 = VIRTQUEUE_ALIGN(sizeof(struct vring_desc) * vq_size(((sizeof(struct vring_desc) * vq_size + sizeof(uint16_t) * ( 2 + vq_size))+((4096)-1))& ~((4096)-1)) |
| 114 | + sizeof(uint16_t) * (2 + vq_size))(((sizeof(struct vring_desc) * vq_size + sizeof(uint16_t) * ( 2 + vq_size))+((4096)-1))& ~((4096)-1)); |
| 115 | /* allocsize2: used ring + pad */ |
| 116 | allocsize2 = VIRTQUEUE_ALIGN(sizeof(uint16_t) * 2(((sizeof(uint16_t) * 2 + sizeof(struct vring_used_elem) * vq_size )+((4096)-1))& ~((4096)-1)) |
| 117 | + sizeof(struct vring_used_elem) * vq_size)(((sizeof(uint16_t) * 2 + sizeof(struct vring_used_elem) * vq_size )+((4096)-1))& ~((4096)-1)); |
| 118 | |
| 119 | return allocsize1 + allocsize2; |
| 120 | } |
| 121 | |
| 122 | /* Update queue select */ |
| 123 | void |
| 124 | viornd_update_qs(void) |
| 125 | { |
| 126 | /* Invalid queue? */ |
| 127 | if (viornd.cfg.queue_select > 0) { |
| 128 | viornd.cfg.queue_size = 0; |
| 129 | return; |
| 130 | } |
| 131 | |
| 132 | /* Update queue address/size based on queue select */ |
| 133 | viornd.cfg.queue_address = viornd.vq[viornd.cfg.queue_select].qa; |
| 134 | viornd.cfg.queue_size = viornd.vq[viornd.cfg.queue_select].qs; |
| 135 | } |
| 136 | |
| 137 | /* Update queue address */ |
| 138 | void |
| 139 | viornd_update_qa(void) |
| 140 | { |
| 141 | /* Invalid queue? */ |
| 142 | if (viornd.cfg.queue_select > 0) |
| 143 | return; |
| 144 | |
| 145 | viornd.vq[viornd.cfg.queue_select].qa = viornd.cfg.queue_address; |
| 146 | } |
| 147 | |
| 148 | int |
| 149 | viornd_notifyq(void) |
| 150 | { |
| 151 | uint64_t q_gpa; |
| 152 | uint32_t vr_sz; |
| 153 | size_t sz; |
| 154 | int dxx, ret; |
| 155 | uint16_t aidx, uidx; |
| 156 | char *buf, *rnd_data; |
| 157 | struct vring_desc *desc; |
| 158 | struct vring_avail *avail; |
| 159 | struct vring_used *used; |
| 160 | |
| 161 | ret = 0; |
| 162 | |
| 163 | /* Invalid queue? */ |
| 164 | if (viornd.cfg.queue_notify > 0) |
| 165 | return (0); |
| 166 | |
| 167 | vr_sz = vring_size(VIORND_QUEUE_SIZE64); |
| 168 | q_gpa = viornd.vq[viornd.cfg.queue_notify].qa; |
| 169 | q_gpa = q_gpa * VIRTIO_PAGE_SIZE(4096); |
| 170 | |
| 171 | buf = calloc(1, vr_sz); |
| 172 | if (buf == NULL((void*)0)) { |
| 173 | log_warn("calloc error getting viornd ring"); |
| 174 | return (0); |
| 175 | } |
| 176 | |
| 177 | if (read_mem(q_gpa, buf, vr_sz)) { |
| 178 | free(buf); |
| 179 | return (0); |
| 180 | } |
| 181 | |
| 182 | desc = (struct vring_desc *)(buf); |
| 183 | avail = (struct vring_avail *)(buf + |
| 184 | viornd.vq[viornd.cfg.queue_notify].vq_availoffset); |
| 185 | used = (struct vring_used *)(buf + |
| 186 | viornd.vq[viornd.cfg.queue_notify].vq_usedoffset); |
| 187 | |
| 188 | aidx = avail->idx & VIORND_QUEUE_MASK(64 - 1); |
| 189 | uidx = used->idx & VIORND_QUEUE_MASK(64 - 1); |
| 190 | |
| 191 | dxx = avail->ring[aidx] & VIORND_QUEUE_MASK(64 - 1); |
| 192 | |
| 193 | sz = desc[dxx].len; |
| 194 | if (sz > MAXPHYS(64 * 1024)) |
| 195 | fatalx("viornd descriptor size too large (%zu)", sz); |
| 196 | |
| 197 | rnd_data = malloc(sz); |
| 198 | |
| 199 | if (rnd_data != NULL((void*)0)) { |
| 200 | arc4random_buf(rnd_data, sz); |
| 201 | if (write_mem(desc[dxx].addr, rnd_data, sz)) { |
| 202 | log_warnx("viornd: can't write random data @ " |
| 203 | "0x%llx", |
| 204 | desc[dxx].addr); |
| 205 | } else { |
| 206 | /* ret == 1 -> interrupt needed */ |
| 207 | /* XXX check VIRTIO_F_NO_INTR */ |
| 208 | ret = 1; |
| 209 | viornd.cfg.isr_status = 1; |
| 210 | used->ring[uidx].id = dxx; |
| 211 | used->ring[uidx].len = sz; |
| 212 | used->idx++; |
| 213 | |
| 214 | if (write_mem(q_gpa, buf, vr_sz)) { |
| 215 | log_warnx("viornd: error writing vio ring"); |
| 216 | } |
| 217 | } |
| 218 | free(rnd_data); |
| 219 | } else |
| 220 | fatal("memory allocation error for viornd data"); |
| 221 | |
| 222 | free(buf); |
| 223 | |
| 224 | return (ret); |
| 225 | } |
| 226 | |
| 227 | int |
| 228 | virtio_rnd_io(int dir, uint16_t reg, uint32_t *data, uint8_t *intr, |
| 229 | void *unused, uint8_t sz) |
| 230 | { |
| 231 | *intr = 0xFF; |
| 232 | |
| 233 | if (dir == 0) { |
| 234 | switch (reg) { |
| 235 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 236 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 237 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 238 | log_warnx("%s: illegal write %x to %s", |
| 239 | __progname, *data, virtio_reg_name(reg)); |
| 240 | break; |
| 241 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 242 | viornd.cfg.guest_feature = *data; |
| 243 | break; |
| 244 | case VIRTIO_CONFIG_QUEUE_ADDRESS8: |
| 245 | viornd.cfg.queue_address = *data; |
| 246 | viornd_update_qa(); |
| 247 | break; |
| 248 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 249 | viornd.cfg.queue_select = *data; |
| 250 | viornd_update_qs(); |
| 251 | break; |
| 252 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 253 | viornd.cfg.queue_notify = *data; |
| 254 | if (viornd_notifyq()) |
| 255 | *intr = 1; |
| 256 | break; |
| 257 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 258 | viornd.cfg.device_status = *data; |
| 259 | break; |
| 260 | } |
| 261 | } else { |
| 262 | switch (reg) { |
| 263 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 264 | *data = viornd.cfg.device_feature; |
| 265 | break; |
| 266 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 267 | *data = viornd.cfg.guest_feature; |
| 268 | break; |
| 269 | case VIRTIO_CONFIG_QUEUE_ADDRESS8: |
| 270 | *data = viornd.cfg.queue_address; |
| 271 | break; |
| 272 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 273 | *data = viornd.cfg.queue_size; |
| 274 | break; |
| 275 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 276 | *data = viornd.cfg.queue_select; |
| 277 | break; |
| 278 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 279 | *data = viornd.cfg.queue_notify; |
| 280 | break; |
| 281 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 282 | *data = viornd.cfg.device_status; |
| 283 | break; |
| 284 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 285 | *data = viornd.cfg.isr_status; |
| 286 | viornd.cfg.isr_status = 0; |
| 287 | vcpu_deassert_pic_irq(viornd.vm_id, 0, viornd.irq); |
| 288 | break; |
| 289 | } |
| 290 | } |
| 291 | return (0); |
| 292 | } |
| 293 | |
| 294 | void |
| 295 | vioblk_update_qa(struct vioblk_dev *dev) |
| 296 | { |
| 297 | /* Invalid queue? */ |
| 298 | if (dev->cfg.queue_select > 0) |
| 299 | return; |
| 300 | |
| 301 | dev->vq[dev->cfg.queue_select].qa = dev->cfg.queue_address; |
| 302 | } |
| 303 | |
| 304 | void |
| 305 | vioblk_update_qs(struct vioblk_dev *dev) |
| 306 | { |
| 307 | /* Invalid queue? */ |
| 308 | if (dev->cfg.queue_select > 0) { |
| 309 | dev->cfg.queue_size = 0; |
| 310 | return; |
| 311 | } |
| 312 | |
| 313 | /* Update queue address/size based on queue select */ |
| 314 | dev->cfg.queue_address = dev->vq[dev->cfg.queue_select].qa; |
| 315 | dev->cfg.queue_size = dev->vq[dev->cfg.queue_select].qs; |
| 316 | } |
| 317 | |
| 318 | static void |
| 319 | vioblk_free_info(struct ioinfo *info) |
| 320 | { |
| 321 | if (!info) |
| 322 | return; |
| 323 | free(info->buf); |
| 324 | free(info); |
| 325 | } |
| 326 | |
| 327 | static struct ioinfo * |
| 328 | vioblk_start_read(struct vioblk_dev *dev, off_t sector, size_t sz) |
| 329 | { |
| 330 | struct ioinfo *info; |
| 331 | |
| 332 | /* Limit to 64M for now */ |
| 333 | if (sz > (1 << 26)) { |
| 334 | log_warnx("%s: read size exceeded 64M", __func__); |
| 335 | return (NULL((void*)0)); |
| 336 | } |
| 337 | |
| 338 | info = calloc(1, sizeof(*info)); |
| 339 | if (!info) |
| 340 | goto nomem; |
| 341 | info->buf = malloc(sz); |
| 342 | if (info->buf == NULL((void*)0)) |
| 343 | goto nomem; |
| 344 | info->len = sz; |
| 345 | info->offset = sector * VIRTIO_BLK_SECTOR_SIZE512; |
| 346 | info->file = &dev->file; |
| 347 | |
| 348 | return info; |
| 349 | |
| 350 | nomem: |
| 351 | free(info); |
| 352 | log_warn("malloc error vioblk read"); |
| 353 | return (NULL((void*)0)); |
| 354 | } |
| 355 | |
| 356 | |
| 357 | static const uint8_t * |
| 358 | vioblk_finish_read(struct ioinfo *info) |
| 359 | { |
| 360 | struct virtio_backing *file; |
| 361 | |
| 362 | file = info->file; |
| 363 | if (file->pread(file->p, info->buf, info->len, info->offset) != info->len) { |
| 364 | info->error = errno(*__errno()); |
| 365 | log_warn("vioblk read error"); |
| 366 | return NULL((void*)0); |
| 367 | } |
| 368 | |
| 369 | return info->buf; |
| 370 | } |
| 371 | |
| 372 | static struct ioinfo * |
| 373 | vioblk_start_write(struct vioblk_dev *dev, off_t sector, |
| 374 | paddr_t addr, size_t len) |
| 375 | { |
| 376 | struct ioinfo *info; |
| 377 | |
| 378 | /* Limit to 64M for now */ |
| 379 | if (len > (1 << 26)) { |
| 380 | log_warnx("%s: write size exceeded 64M", __func__); |
| 381 | return (NULL((void*)0)); |
| 382 | } |
| 383 | |
| 384 | info = calloc(1, sizeof(*info)); |
| 385 | if (!info) |
| 386 | goto nomem; |
| 387 | |
| 388 | info->buf = malloc(len); |
| 389 | if (info->buf == NULL((void*)0)) |
| 390 | goto nomem; |
| 391 | info->len = len; |
| 392 | info->offset = sector * VIRTIO_BLK_SECTOR_SIZE512; |
| 393 | info->file = &dev->file; |
| 394 | |
| 395 | if (read_mem(addr, info->buf, info->len)) { |
| 396 | vioblk_free_info(info); |
| 397 | return NULL((void*)0); |
| 398 | } |
| 399 | |
| 400 | return info; |
| 401 | |
| 402 | nomem: |
| 403 | free(info); |
| 404 | log_warn("malloc error vioblk write"); |
| 405 | return (NULL((void*)0)); |
| 406 | } |
| 407 | |
| 408 | static int |
| 409 | vioblk_finish_write(struct ioinfo *info) |
| 410 | { |
| 411 | struct virtio_backing *file; |
| 412 | |
| 413 | file = info->file; |
| 414 | if (file->pwrite(file->p, info->buf, info->len, info->offset) != info->len) { |
| 415 | log_warn("vioblk write error"); |
| 416 | return EIO5; |
| 417 | } |
| 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | /* |
| 422 | * XXX in various cases, ds should be set to VIRTIO_BLK_S_IOERR, if we can |
| 423 | */ |
| 424 | int |
| 425 | vioblk_notifyq(struct vioblk_dev *dev) |
| 426 | { |
| 427 | uint64_t q_gpa; |
| 428 | uint32_t vr_sz; |
| 429 | uint16_t idx, cmd_desc_idx, secdata_desc_idx, ds_desc_idx; |
| 430 | uint8_t ds; |
| 431 | int cnt, ret; |
| 432 | off_t secbias; |
| 433 | char *vr; |
| 434 | struct vring_desc *desc, *cmd_desc, *secdata_desc, *ds_desc; |
| 435 | struct vring_avail *avail; |
| 436 | struct vring_used *used; |
| 437 | struct virtio_blk_req_hdr cmd; |
| 438 | |
| 439 | ret = 0; |
| 440 | |
| 441 | /* Invalid queue? */ |
| 442 | if (dev->cfg.queue_notify > 0) |
| 443 | return (0); |
| 444 | |
| 445 | vr_sz = vring_size(VIOBLK_QUEUE_SIZE128); |
| 446 | q_gpa = dev->vq[dev->cfg.queue_notify].qa; |
| 447 | q_gpa = q_gpa * VIRTIO_PAGE_SIZE(4096); |
| 448 | |
| 449 | vr = calloc(1, vr_sz); |
| 450 | if (vr == NULL((void*)0)) { |
| 451 | log_warn("calloc error getting vioblk ring"); |
| 452 | return (0); |
| 453 | } |
| 454 | |
| 455 | if (read_mem(q_gpa, vr, vr_sz)) { |
| 456 | log_warnx("error reading gpa 0x%llx", q_gpa); |
| 457 | goto out; |
| 458 | } |
| 459 | |
| 460 | /* Compute offsets in ring of descriptors, avail ring, and used ring */ |
| 461 | desc = (struct vring_desc *)(vr); |
| 462 | avail = (struct vring_avail *)(vr + |
| 463 | dev->vq[dev->cfg.queue_notify].vq_availoffset); |
| 464 | used = (struct vring_used *)(vr + |
| 465 | dev->vq[dev->cfg.queue_notify].vq_usedoffset); |
| 466 | |
| 467 | idx = dev->vq[dev->cfg.queue_notify].last_avail & VIOBLK_QUEUE_MASK(128 - 1); |
| 468 | |
| 469 | if ((avail->idx & VIOBLK_QUEUE_MASK(128 - 1)) == idx) { |
| 470 | log_warnx("vioblk queue notify - nothing to do?"); |
| 471 | goto out; |
| 472 | } |
| 473 | |
| 474 | while (idx != (avail->idx & VIOBLK_QUEUE_MASK(128 - 1))) { |
| 475 | |
| 476 | cmd_desc_idx = avail->ring[idx] & VIOBLK_QUEUE_MASK(128 - 1); |
| 477 | cmd_desc = &desc[cmd_desc_idx]; |
| 478 | |
| 479 | if ((cmd_desc->flags & VRING_DESC_F_NEXT1) == 0) { |
| 480 | log_warnx("unchained vioblk cmd descriptor received " |
| 481 | "(idx %d)", cmd_desc_idx); |
| 482 | goto out; |
| 483 | } |
| 484 | |
| 485 | /* Read command from descriptor ring */ |
| 486 | if (cmd_desc->flags & VRING_DESC_F_WRITE2) { |
| 487 | log_warnx("vioblk: unexpected writable cmd descriptor " |
| 488 | "%d", cmd_desc_idx); |
| 489 | goto out; |
| 490 | } |
| 491 | if (read_mem(cmd_desc->addr, &cmd, sizeof(cmd))) { |
| 492 | log_warnx("vioblk: command read_mem error @ 0x%llx", |
| 493 | cmd_desc->addr); |
| 494 | goto out; |
| 495 | } |
| 496 | |
| 497 | switch (cmd.type) { |
| 498 | case VIRTIO_BLK_T_IN0: |
| 499 | /* first descriptor */ |
| 500 | secdata_desc_idx = cmd_desc->next & VIOBLK_QUEUE_MASK(128 - 1); |
| 501 | secdata_desc = &desc[secdata_desc_idx]; |
| 502 | |
| 503 | if ((secdata_desc->flags & VRING_DESC_F_NEXT1) == 0) { |
| 504 | log_warnx("unchained vioblk data descriptor " |
| 505 | "received (idx %d)", cmd_desc_idx); |
| 506 | goto out; |
| 507 | } |
| 508 | |
| 509 | cnt = 0; |
| 510 | secbias = 0; |
| 511 | do { |
| 512 | struct ioinfo *info; |
| 513 | const uint8_t *secdata; |
| 514 | |
| 515 | if ((secdata_desc->flags & VRING_DESC_F_WRITE2) |
| 516 | == 0) { |
| 517 | log_warnx("vioblk: unwritable data " |
| 518 | "descriptor %d", secdata_desc_idx); |
| 519 | goto out; |
| 520 | } |
| 521 | |
| 522 | info = vioblk_start_read(dev, |
| 523 | cmd.sector + secbias, secdata_desc->len); |
| 524 | |
| 525 | if (info == NULL((void*)0)) { |
| 526 | log_warnx("vioblk: can't start read"); |
| 527 | goto out; |
| 528 | } |
| 529 | |
| 530 | /* read the data, use current data descriptor */ |
| 531 | secdata = vioblk_finish_read(info); |
| 532 | if (secdata == NULL((void*)0)) { |
| 533 | vioblk_free_info(info); |
| 534 | log_warnx("vioblk: block read error, " |
| 535 | "sector %lld", cmd.sector); |
| 536 | goto out; |
| 537 | } |
| 538 | |
| 539 | if (write_mem(secdata_desc->addr, secdata, |
| 540 | secdata_desc->len)) { |
| 541 | log_warnx("can't write sector " |
| 542 | "data to gpa @ 0x%llx", |
| 543 | secdata_desc->addr); |
| 544 | vioblk_free_info(info); |
| 545 | goto out; |
| 546 | } |
| 547 | |
| 548 | vioblk_free_info(info); |
| 549 | |
| 550 | secbias += (secdata_desc->len / |
| 551 | VIRTIO_BLK_SECTOR_SIZE512); |
| 552 | secdata_desc_idx = secdata_desc->next & |
| 553 | VIOBLK_QUEUE_MASK(128 - 1); |
| 554 | secdata_desc = &desc[secdata_desc_idx]; |
| 555 | |
| 556 | /* Guard against infinite chains */ |
| 557 | if (++cnt >= VIOBLK_QUEUE_SIZE128) { |
| 558 | log_warnx("%s: descriptor table " |
| 559 | "invalid", __func__); |
| 560 | goto out; |
| 561 | } |
| 562 | } while (secdata_desc->flags & VRING_DESC_F_NEXT1); |
| 563 | |
| 564 | ds_desc_idx = secdata_desc_idx; |
| 565 | ds_desc = secdata_desc; |
| 566 | |
| 567 | ds = VIRTIO_BLK_S_OK0; |
| 568 | break; |
| 569 | case VIRTIO_BLK_T_OUT1: |
| 570 | secdata_desc_idx = cmd_desc->next & VIOBLK_QUEUE_MASK(128 - 1); |
| 571 | secdata_desc = &desc[secdata_desc_idx]; |
| 572 | |
| 573 | if ((secdata_desc->flags & VRING_DESC_F_NEXT1) == 0) { |
| 574 | log_warnx("wr vioblk: unchained vioblk data " |
| 575 | "descriptor received (idx %d)", |
| 576 | cmd_desc_idx); |
| 577 | goto out; |
| 578 | } |
| 579 | |
| 580 | if (secdata_desc->len > dev->max_xfer) { |
| 581 | log_warnx("%s: invalid read size %d requested", |
| 582 | __func__, secdata_desc->len); |
| 583 | goto out; |
| 584 | } |
| 585 | |
| 586 | cnt = 0; |
| 587 | secbias = 0; |
| 588 | do { |
| 589 | struct ioinfo *info; |
| 590 | |
| 591 | if (secdata_desc->flags & VRING_DESC_F_WRITE2) { |
| 592 | log_warnx("wr vioblk: unexpected " |
| 593 | "writable data descriptor %d", |
| 594 | secdata_desc_idx); |
| 595 | goto out; |
| 596 | } |
| 597 | |
| 598 | info = vioblk_start_write(dev, |
| 599 | cmd.sector + secbias, |
| 600 | secdata_desc->addr, secdata_desc->len); |
| 601 | |
| 602 | if (info == NULL((void*)0)) { |
| 603 | log_warnx("wr vioblk: can't read " |
| 604 | "sector data @ 0x%llx", |
| 605 | secdata_desc->addr); |
| 606 | goto out; |
| 607 | } |
| 608 | |
| 609 | if (vioblk_finish_write(info)) { |
| 610 | log_warnx("wr vioblk: disk write " |
| 611 | "error"); |
| 612 | vioblk_free_info(info); |
| 613 | goto out; |
| 614 | } |
| 615 | |
| 616 | vioblk_free_info(info); |
| 617 | |
| 618 | secbias += secdata_desc->len / |
| 619 | VIRTIO_BLK_SECTOR_SIZE512; |
| 620 | |
| 621 | secdata_desc_idx = secdata_desc->next & |
| 622 | VIOBLK_QUEUE_MASK(128 - 1); |
| 623 | secdata_desc = &desc[secdata_desc_idx]; |
| 624 | |
| 625 | /* Guard against infinite chains */ |
| 626 | if (++cnt >= VIOBLK_QUEUE_SIZE128) { |
| 627 | log_warnx("%s: descriptor table " |
| 628 | "invalid", __func__); |
| 629 | goto out; |
| 630 | } |
| 631 | } while (secdata_desc->flags & VRING_DESC_F_NEXT1); |
| 632 | |
| 633 | ds_desc_idx = secdata_desc_idx; |
| 634 | ds_desc = secdata_desc; |
| 635 | |
| 636 | ds = VIRTIO_BLK_S_OK0; |
| 637 | break; |
| 638 | case VIRTIO_BLK_T_FLUSH4: |
| 639 | case VIRTIO_BLK_T_FLUSH_OUT5: |
| 640 | ds_desc_idx = cmd_desc->next & VIOBLK_QUEUE_MASK(128 - 1); |
| 641 | ds_desc = &desc[ds_desc_idx]; |
| 642 | |
| 643 | ds = VIRTIO_BLK_S_UNSUPP2; |
| 644 | break; |
| 645 | case VIRTIO_BLK_T_GET_ID8: |
| 646 | secdata_desc_idx = cmd_desc->next & VIOBLK_QUEUE_MASK(128 - 1); |
| 647 | secdata_desc = &desc[secdata_desc_idx]; |
| 648 | |
| 649 | /* |
| 650 | * We don't support this command yet. While it's not |
| 651 | * officially part of the virtio spec (will be in v1.2) |
| 652 | * there's no feature to negotiate. Linux drivers will |
| 653 | * often send this command regardless. |
| 654 | * |
| 655 | * When the command is received, it should appear as a |
| 656 | * chain of 3 descriptors, similar to the IN/OUT |
| 657 | * commands. The middle descriptor should have have a |
| 658 | * length of VIRTIO_BLK_ID_BYTES bytes. |
| 659 | */ |
| 660 | if ((secdata_desc->flags & VRING_DESC_F_NEXT1) == 0) { |
| 661 | log_warnx("id vioblk: unchained vioblk data " |
| 662 | "descriptor received (idx %d)", |
| 663 | cmd_desc_idx); |
| 664 | goto out; |
| 665 | } |
| 666 | |
| 667 | /* Skip the data descriptor. */ |
| 668 | ds_desc_idx = secdata_desc->next & VIOBLK_QUEUE_MASK(128 - 1); |
| 669 | ds_desc = &desc[ds_desc_idx]; |
| 670 | |
| 671 | ds = VIRTIO_BLK_S_UNSUPP2; |
| 672 | break; |
| 673 | default: |
| 674 | log_warnx("%s: unsupported command 0x%x", __func__, |
| 675 | cmd.type); |
| 676 | ds_desc_idx = cmd_desc->next & VIOBLK_QUEUE_MASK(128 - 1); |
| 677 | ds_desc = &desc[ds_desc_idx]; |
| 678 | |
| 679 | ds = VIRTIO_BLK_S_UNSUPP2; |
| 680 | break; |
| 681 | } |
| 682 | |
| 683 | if ((ds_desc->flags & VRING_DESC_F_WRITE2) == 0) { |
| 684 | log_warnx("%s: ds descriptor %d unwritable", __func__, |
| 685 | ds_desc_idx); |
| 686 | goto out; |
| 687 | } |
| 688 | if (write_mem(ds_desc->addr, &ds, sizeof(ds))) { |
| 689 | log_warnx("%s: can't write device status data @ 0x%llx", |
| 690 | __func__, ds_desc->addr); |
| 691 | goto out; |
| 692 | } |
| 693 | |
| 694 | ret = 1; |
| 695 | dev->cfg.isr_status = 1; |
| 696 | used->ring[used->idx & VIOBLK_QUEUE_MASK(128 - 1)].id = cmd_desc_idx; |
| 697 | used->ring[used->idx & VIOBLK_QUEUE_MASK(128 - 1)].len = cmd_desc->len; |
| 698 | used->idx++; |
| 699 | |
| 700 | dev->vq[dev->cfg.queue_notify].last_avail = avail->idx & |
| 701 | VIOBLK_QUEUE_MASK(128 - 1); |
| 702 | if (write_mem(q_gpa, vr, vr_sz)) |
| 703 | log_warnx("%s: error writing vio ring", __func__); |
| 704 | |
| 705 | idx = (idx + 1) & VIOBLK_QUEUE_MASK(128 - 1); |
| 706 | } |
| 707 | out: |
| 708 | free(vr); |
| 709 | return (ret); |
| 710 | } |
| 711 | |
| 712 | int |
| 713 | virtio_blk_io(int dir, uint16_t reg, uint32_t *data, uint8_t *intr, |
| 714 | void *cookie, uint8_t sz) |
| 715 | { |
| 716 | struct vioblk_dev *dev = (struct vioblk_dev *)cookie; |
| 717 | |
| 718 | *intr = 0xFF; |
| 719 | |
| 720 | |
| 721 | if (dir == 0) { |
| 722 | switch (reg) { |
| 723 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 724 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 725 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 726 | log_warnx("%s: illegal write %x to %s", |
| 727 | __progname, *data, virtio_reg_name(reg)); |
| 728 | break; |
| 729 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 730 | dev->cfg.guest_feature = *data; |
| 731 | break; |
| 732 | case VIRTIO_CONFIG_QUEUE_ADDRESS8: |
| 733 | dev->cfg.queue_address = *data; |
| 734 | vioblk_update_qa(dev); |
| 735 | break; |
| 736 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 737 | dev->cfg.queue_select = *data; |
| 738 | vioblk_update_qs(dev); |
| 739 | break; |
| 740 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 741 | dev->cfg.queue_notify = *data; |
| 742 | if (vioblk_notifyq(dev)) |
| 743 | *intr = 1; |
| 744 | break; |
| 745 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 746 | dev->cfg.device_status = *data; |
| 747 | if (dev->cfg.device_status == 0) { |
| 748 | log_debug("%s: device reset", __func__); |
| 749 | dev->cfg.guest_feature = 0; |
| 750 | dev->cfg.queue_address = 0; |
| 751 | vioblk_update_qa(dev); |
| 752 | dev->cfg.queue_size = 0; |
| 753 | vioblk_update_qs(dev); |
| 754 | dev->cfg.queue_select = 0; |
| 755 | dev->cfg.queue_notify = 0; |
| 756 | dev->cfg.isr_status = 0; |
| 757 | dev->vq[0].last_avail = 0; |
| 758 | vcpu_deassert_pic_irq(dev->vm_id, 0, dev->irq); |
| 759 | } |
| 760 | break; |
| 761 | default: |
| 762 | break; |
| 763 | } |
| 764 | } else { |
| 765 | switch (reg) { |
| 766 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20: |
| 767 | switch (sz) { |
| 768 | case 4: |
| 769 | *data = (uint32_t)(dev->sz); |
| 770 | break; |
| 771 | case 2: |
| 772 | *data &= 0xFFFF0000; |
| 773 | *data |= (uint32_t)(dev->sz) & 0xFFFF; |
| 774 | break; |
| 775 | case 1: |
| 776 | *data &= 0xFFFFFF00; |
| 777 | *data |= (uint32_t)(dev->sz) & 0xFF; |
| 778 | break; |
| 779 | } |
| 780 | /* XXX handle invalid sz */ |
| 781 | break; |
| 782 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 1: |
| 783 | if (sz == 1) { |
| 784 | *data &= 0xFFFFFF00; |
| 785 | *data |= (uint32_t)(dev->sz >> 8) & 0xFF; |
| 786 | } |
| 787 | /* XXX handle invalid sz */ |
| 788 | break; |
| 789 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 2: |
| 790 | if (sz == 1) { |
| 791 | *data &= 0xFFFFFF00; |
| 792 | *data |= (uint32_t)(dev->sz >> 16) & 0xFF; |
| 793 | } else if (sz == 2) { |
| 794 | *data &= 0xFFFF0000; |
| 795 | *data |= (uint32_t)(dev->sz >> 16) & 0xFFFF; |
| 796 | } |
| 797 | /* XXX handle invalid sz */ |
| 798 | break; |
| 799 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 3: |
| 800 | if (sz == 1) { |
| 801 | *data &= 0xFFFFFF00; |
| 802 | *data |= (uint32_t)(dev->sz >> 24) & 0xFF; |
| 803 | } |
| 804 | /* XXX handle invalid sz */ |
| 805 | break; |
| 806 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 4: |
| 807 | switch (sz) { |
| 808 | case 4: |
| 809 | *data = (uint32_t)(dev->sz >> 32); |
| 810 | break; |
| 811 | case 2: |
| 812 | *data &= 0xFFFF0000; |
| 813 | *data |= (uint32_t)(dev->sz >> 32) & 0xFFFF; |
| 814 | break; |
| 815 | case 1: |
| 816 | *data &= 0xFFFFFF00; |
| 817 | *data |= (uint32_t)(dev->sz >> 32) & 0xFF; |
| 818 | break; |
| 819 | } |
| 820 | /* XXX handle invalid sz */ |
| 821 | break; |
| 822 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 5: |
| 823 | if (sz == 1) { |
| 824 | *data &= 0xFFFFFF00; |
| 825 | *data |= (uint32_t)(dev->sz >> 40) & 0xFF; |
| 826 | } |
| 827 | /* XXX handle invalid sz */ |
| 828 | break; |
| 829 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 6: |
| 830 | if (sz == 1) { |
| 831 | *data &= 0xFFFFFF00; |
| 832 | *data |= (uint32_t)(dev->sz >> 48) & 0xFF; |
| 833 | } else if (sz == 2) { |
| 834 | *data &= 0xFFFF0000; |
| 835 | *data |= (uint32_t)(dev->sz >> 48) & 0xFFFF; |
| 836 | } |
| 837 | /* XXX handle invalid sz */ |
| 838 | break; |
| 839 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 7: |
| 840 | if (sz == 1) { |
| 841 | *data &= 0xFFFFFF00; |
| 842 | *data |= (uint32_t)(dev->sz >> 56) & 0xFF; |
| 843 | } |
| 844 | /* XXX handle invalid sz */ |
| 845 | break; |
| 846 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 8: |
| 847 | switch (sz) { |
| 848 | case 4: |
| 849 | *data = (uint32_t)(dev->max_xfer); |
| 850 | break; |
| 851 | case 2: |
| 852 | *data &= 0xFFFF0000; |
| 853 | *data |= (uint32_t)(dev->max_xfer) & 0xFFFF; |
| 854 | break; |
| 855 | case 1: |
| 856 | *data &= 0xFFFFFF00; |
| 857 | *data |= (uint32_t)(dev->max_xfer) & 0xFF; |
| 858 | break; |
| 859 | } |
| 860 | /* XXX handle invalid sz */ |
| 861 | break; |
| 862 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 9: |
| 863 | if (sz == 1) { |
| 864 | *data &= 0xFFFFFF00; |
| 865 | *data |= (uint32_t)(dev->max_xfer >> 8) & 0xFF; |
| 866 | } |
| 867 | /* XXX handle invalid sz */ |
| 868 | break; |
| 869 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 10: |
| 870 | if (sz == 1) { |
| 871 | *data &= 0xFFFFFF00; |
| 872 | *data |= (uint32_t)(dev->max_xfer >> 16) & 0xFF; |
| 873 | } else if (sz == 2) { |
| 874 | *data &= 0xFFFF0000; |
| 875 | *data |= (uint32_t)(dev->max_xfer >> 16) |
| 876 | & 0xFFFF; |
| 877 | } |
| 878 | /* XXX handle invalid sz */ |
| 879 | break; |
| 880 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 11: |
| 881 | if (sz == 1) { |
| 882 | *data &= 0xFFFFFF00; |
| 883 | *data |= (uint32_t)(dev->max_xfer >> 24) & 0xFF; |
| 884 | } |
| 885 | /* XXX handle invalid sz */ |
| 886 | break; |
| 887 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 888 | *data = dev->cfg.device_feature; |
| 889 | break; |
| 890 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 891 | *data = dev->cfg.guest_feature; |
| 892 | break; |
| 893 | case VIRTIO_CONFIG_QUEUE_ADDRESS8: |
| 894 | *data = dev->cfg.queue_address; |
| 895 | break; |
| 896 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 897 | if (sz == 4) |
| 898 | *data = dev->cfg.queue_size; |
| 899 | else if (sz == 2) { |
| 900 | *data &= 0xFFFF0000; |
| 901 | *data |= (uint16_t)dev->cfg.queue_size; |
| 902 | } else if (sz == 1) { |
| 903 | *data &= 0xFFFFFF00; |
| 904 | *data |= (uint8_t)dev->cfg.queue_size; |
| 905 | } |
| 906 | break; |
| 907 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 908 | *data = dev->cfg.queue_select; |
| 909 | break; |
| 910 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 911 | *data = dev->cfg.queue_notify; |
| 912 | break; |
| 913 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 914 | if (sz == 4) |
| 915 | *data = dev->cfg.device_status; |
| 916 | else if (sz == 2) { |
| 917 | *data &= 0xFFFF0000; |
| 918 | *data |= (uint16_t)dev->cfg.device_status; |
| 919 | } else if (sz == 1) { |
| 920 | *data &= 0xFFFFFF00; |
| 921 | *data |= (uint8_t)dev->cfg.device_status; |
| 922 | } |
| 923 | break; |
| 924 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 925 | *data = dev->cfg.isr_status; |
| 926 | dev->cfg.isr_status = 0; |
| 927 | vcpu_deassert_pic_irq(dev->vm_id, 0, dev->irq); |
| 928 | break; |
| 929 | } |
| 930 | } |
| 931 | return (0); |
| 932 | } |
| 933 | |
| 934 | int |
| 935 | virtio_net_io(int dir, uint16_t reg, uint32_t *data, uint8_t *intr, |
| 936 | void *cookie, uint8_t sz) |
| 937 | { |
| 938 | struct vionet_dev *dev = (struct vionet_dev *)cookie; |
| 939 | |
| 940 | *intr = 0xFF; |
| 941 | mutex_lock(&dev->mutex); |
| 942 | |
| 943 | if (dir == 0) { |
| 944 | switch (reg) { |
| 945 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 946 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 947 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 948 | log_warnx("%s: illegal write %x to %s", |
| 949 | __progname, *data, virtio_reg_name(reg)); |
| 950 | break; |
| 951 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 952 | dev->cfg.guest_feature = *data; |
| 953 | break; |
| 954 | case VIRTIO_CONFIG_QUEUE_ADDRESS8: |
| 955 | dev->cfg.queue_address = *data; |
| 956 | vionet_update_qa(dev); |
| 957 | break; |
| 958 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 959 | dev->cfg.queue_select = *data; |
| 960 | vionet_update_qs(dev); |
| 961 | break; |
| 962 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 963 | dev->cfg.queue_notify = *data; |
| 964 | if (vionet_notifyq(dev)) |
| 965 | *intr = 1; |
| 966 | break; |
| 967 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 968 | dev->cfg.device_status = *data; |
| 969 | if (dev->cfg.device_status == 0) { |
| 970 | log_debug("%s: device reset", __func__); |
| 971 | dev->cfg.guest_feature = 0; |
| 972 | dev->cfg.queue_address = 0; |
| 973 | vionet_update_qa(dev); |
| 974 | dev->cfg.queue_size = 0; |
| 975 | vionet_update_qs(dev); |
| 976 | dev->cfg.queue_select = 0; |
| 977 | dev->cfg.queue_notify = 0; |
| 978 | dev->cfg.isr_status = 0; |
| 979 | dev->vq[RXQ0].last_avail = 0; |
| 980 | dev->vq[RXQ0].notified_avail = 0; |
| 981 | dev->vq[TXQ1].last_avail = 0; |
| 982 | dev->vq[TXQ1].notified_avail = 0; |
| 983 | vcpu_deassert_pic_irq(dev->vm_id, 0, dev->irq); |
| 984 | } |
| 985 | break; |
| 986 | default: |
| 987 | break; |
| 988 | } |
| 989 | } else { |
| 990 | switch (reg) { |
| 991 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20: |
| 992 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 1: |
| 993 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 2: |
| 994 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 3: |
| 995 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 4: |
| 996 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 5: |
| 997 | *data = dev->mac[reg - |
| 998 | VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20]; |
| 999 | break; |
| 1000 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 1001 | *data = dev->cfg.device_feature; |
| 1002 | break; |
| 1003 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 1004 | *data = dev->cfg.guest_feature; |
| 1005 | break; |
| 1006 | case VIRTIO_CONFIG_QUEUE_ADDRESS8: |
| 1007 | *data = dev->cfg.queue_address; |
| 1008 | break; |
| 1009 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 1010 | *data = dev->cfg.queue_size; |
| 1011 | break; |
| 1012 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 1013 | *data = dev->cfg.queue_select; |
| 1014 | break; |
| 1015 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 1016 | *data = dev->cfg.queue_notify; |
| 1017 | break; |
| 1018 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 1019 | *data = dev->cfg.device_status; |
| 1020 | break; |
| 1021 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 1022 | *data = dev->cfg.isr_status; |
| 1023 | dev->cfg.isr_status = 0; |
| 1024 | vcpu_deassert_pic_irq(dev->vm_id, 0, dev->irq); |
| 1025 | break; |
| 1026 | } |
| 1027 | } |
| 1028 | |
| 1029 | mutex_unlock(&dev->mutex); |
| 1030 | return (0); |
| 1031 | } |
| 1032 | |
| 1033 | /* |
| 1034 | * Must be called with dev->mutex acquired. |
| 1035 | */ |
| 1036 | void |
| 1037 | vionet_update_qa(struct vionet_dev *dev) |
| 1038 | { |
| 1039 | /* Invalid queue? */ |
| 1040 | if (dev->cfg.queue_select > 1) |
| 1041 | return; |
| 1042 | |
| 1043 | dev->vq[dev->cfg.queue_select].qa = dev->cfg.queue_address; |
| 1044 | } |
| 1045 | |
| 1046 | /* |
| 1047 | * Must be called with dev->mutex acquired. |
| 1048 | */ |
| 1049 | void |
| 1050 | vionet_update_qs(struct vionet_dev *dev) |
| 1051 | { |
| 1052 | /* Invalid queue? */ |
| 1053 | if (dev->cfg.queue_select > 1) { |
| 1054 | dev->cfg.queue_size = 0; |
| 1055 | return; |
| 1056 | } |
| 1057 | |
| 1058 | /* Update queue address/size based on queue select */ |
| 1059 | dev->cfg.queue_address = dev->vq[dev->cfg.queue_select].qa; |
| 1060 | dev->cfg.queue_size = dev->vq[dev->cfg.queue_select].qs; |
| 1061 | } |
| 1062 | |
| 1063 | /* |
| 1064 | * vionet_enq_rx |
| 1065 | * |
| 1066 | * Take a given packet from the host-side tap and copy it into the guest's |
| 1067 | * buffers utilizing the rx virtio ring. If the packet length is invalid |
| 1068 | * (too small or too large) or if there are not enough buffers available, |
| 1069 | * the packet is dropped. |
| 1070 | * |
| 1071 | * Must be called with dev->mutex acquired. |
| 1072 | */ |
| 1073 | int |
| 1074 | vionet_enq_rx(struct vionet_dev *dev, char *pkt, size_t sz, int *spc) |
| 1075 | { |
| 1076 | uint64_t q_gpa; |
| 1077 | uint32_t vr_sz; |
| 1078 | uint16_t dxx, idx, hdr_desc_idx, chain_hdr_idx; |
| 1079 | int ret = 0; |
| 1080 | char *vr = NULL((void*)0); |
| 1081 | size_t bufsz = 0, off = 0, pkt_offset = 0, chunk_size = 0; |
| 1082 | size_t chain_len = 0; |
| 1083 | struct vring_desc *desc, *pkt_desc, *hdr_desc; |
| 1084 | struct vring_avail *avail; |
| 1085 | struct vring_used *used; |
| 1086 | struct vring_used_elem *ue; |
| 1087 | struct virtio_net_hdr hdr; |
| 1088 | size_t hdr_sz; |
| 1089 | |
| 1090 | if (sz < VIONET_MIN_TXLEN((6 * 2) + 2) || sz > VIONET_MAX_TXLEN16384 + ((6 * 2) + 2)) { |
| 1091 | log_warn("%s: invalid packet size", __func__); |
| 1092 | return (0); |
| 1093 | } |
| 1094 | |
| 1095 | hdr_sz = sizeof(hdr); |
| 1096 | |
| 1097 | if (!(dev->cfg.device_status & VIRTIO_CONFIG_DEVICE_STATUS_DRIVER_OK4)) |
| 1098 | return ret; |
| 1099 | |
| 1100 | vr_sz = vring_size(VIONET_QUEUE_SIZE256); |
| 1101 | q_gpa = dev->vq[RXQ0].qa; |
| 1102 | q_gpa = q_gpa * VIRTIO_PAGE_SIZE(4096); |
| 1103 | |
| 1104 | vr = calloc(1, vr_sz); |
| 1105 | if (vr == NULL((void*)0)) { |
| 1106 | log_warn("rx enq: calloc error getting vionet ring"); |
| 1107 | return (0); |
| 1108 | } |
| 1109 | |
| 1110 | if (read_mem(q_gpa, vr, vr_sz)) { |
| 1111 | log_warnx("rx enq: error reading gpa 0x%llx", q_gpa); |
| 1112 | goto out; |
| 1113 | } |
| 1114 | |
| 1115 | /* Compute offsets in ring of descriptors, avail ring, and used ring */ |
| 1116 | desc = (struct vring_desc *)(vr); |
| 1117 | avail = (struct vring_avail *)(vr + dev->vq[RXQ0].vq_availoffset); |
| 1118 | used = (struct vring_used *)(vr + dev->vq[RXQ0].vq_usedoffset); |
| 1119 | |
| 1120 | idx = dev->vq[RXQ0].last_avail & VIONET_QUEUE_MASK(256 - 1); |
| 1121 | if ((dev->vq[RXQ0].notified_avail & VIONET_QUEUE_MASK(256 - 1)) == idx) { |
| 1122 | log_debug("%s: insufficient available buffer capacity, " |
| 1123 | "dropping packet.", __func__); |
| 1124 | goto out; |
| 1125 | } |
| 1126 | |
| 1127 | hdr_desc_idx = avail->ring[idx] & VIONET_QUEUE_MASK(256 - 1); |
| 1128 | hdr_desc = &desc[hdr_desc_idx]; |
| 1129 | |
| 1130 | dxx = hdr_desc_idx; |
| 1131 | chain_hdr_idx = dxx; |
| 1132 | chain_len = 0; |
| 1133 | |
| 1134 | /* Process the descriptor and walk any potential chain. */ |
| 1135 | do { |
| 1136 | off = 0; |
| 1137 | pkt_desc = &desc[dxx]; |
| 1138 | if (!(pkt_desc->flags & VRING_DESC_F_WRITE2)) { |
| 1139 | log_warnx("%s: invalid descriptor, not writable", |
| 1140 | __func__); |
| 1141 | goto out; |
| 1142 | } |
| 1143 | |
| 1144 | /* How much data do we get to write? */ |
| 1145 | if (sz - bufsz > pkt_desc->len) |
| 1146 | chunk_size = pkt_desc->len; |
| 1147 | else |
| 1148 | chunk_size = sz - bufsz; |
| 1149 | |
| 1150 | if (chain_len == 0) { |
| 1151 | off = hdr_sz; |
| 1152 | if (chunk_size == pkt_desc->len) |
| 1153 | chunk_size -= off; |
| 1154 | } |
| 1155 | |
| 1156 | /* Write a chunk of data if we need to */ |
| 1157 | if (chunk_size && write_mem(pkt_desc->addr + off, |
| 1158 | pkt + pkt_offset, chunk_size)) { |
| 1159 | log_warnx("%s: failed to write to buffer 0x%llx", |
| 1160 | __func__, pkt_desc->addr); |
| 1161 | goto out; |
| 1162 | } |
| 1163 | |
| 1164 | chain_len += chunk_size + off; |
| 1165 | bufsz += chunk_size; |
| 1166 | pkt_offset += chunk_size; |
| 1167 | |
| 1168 | dxx = pkt_desc->next & VIONET_QUEUE_MASK(256 - 1); |
| 1169 | } while (bufsz < sz && pkt_desc->flags & VRING_DESC_F_NEXT1); |
| 1170 | |
| 1171 | /* Update the list of used buffers. */ |
| 1172 | ue = &used->ring[(used->idx) & VIONET_QUEUE_MASK(256 - 1)]; |
| 1173 | ue->id = chain_hdr_idx; |
| 1174 | ue->len = chain_len; |
| 1175 | off = ((char *)ue - vr); |
| 1176 | if (write_mem(q_gpa + off, ue, sizeof(*ue))) { |
| 1177 | log_warnx("%s: error updating rx used ring", __func__); |
| 1178 | goto out; |
| 1179 | } |
| 1180 | |
| 1181 | /* Move our marker in the ring...*/ |
| 1182 | used->idx++; |
| 1183 | dev->vq[RXQ0].last_avail = (dev->vq[RXQ0].last_avail + 1) & |
| 1184 | VIONET_QUEUE_MASK(256 - 1); |
| 1185 | |
| 1186 | /* Prepend the virtio net header in the first buffer. */ |
| 1187 | memset(&hdr, 0, sizeof(hdr)); |
| 1188 | hdr.hdr_len = hdr_sz; |
| 1189 | if (write_mem(hdr_desc->addr, &hdr, hdr_sz)) { |
| 1190 | log_warnx("vionet: rx enq header write_mem error @ 0x%llx", |
| 1191 | hdr_desc->addr); |
| 1192 | goto out; |
| 1193 | } |
| 1194 | |
| 1195 | /* Update the index field in the used ring. This must be done last. */ |
| 1196 | dev->cfg.isr_status = 1; |
| 1197 | off = (char *)&used->idx - vr; |
| 1198 | *spc = (dev->vq[RXQ0].notified_avail - dev->vq[RXQ0].last_avail) & |
| 1199 | VIONET_QUEUE_MASK(256 - 1); |
| 1200 | |
| 1201 | if (write_mem(q_gpa + off, &used->idx, sizeof(used->idx))) |
| 1202 | log_warnx("vionet: error writing vio ring"); |
| 1203 | |
| 1204 | ret = 1; |
| 1205 | |
| 1206 | out: |
| 1207 | free(vr); |
| 1208 | return (ret); |
| 1209 | } |
| 1210 | |
| 1211 | /* |
| 1212 | * vionet_rx |
| 1213 | * |
| 1214 | * Enqueue data that was received on a tap file descriptor |
| 1215 | * to the vionet device queue. |
| 1216 | * |
| 1217 | * Must be called with dev->mutex acquired. |
| 1218 | */ |
| 1219 | static int |
| 1220 | vionet_rx(struct vionet_dev *dev) |
| 1221 | { |
| 1222 | char buf[PAGE_SIZE(1 << 12)]; |
| 1223 | int num_enq = 0, spc = 0; |
| 1224 | struct ether_header *eh; |
| 1225 | ssize_t sz; |
| 1226 | |
| 1227 | do { |
| 1228 | sz = read(dev->fd, buf, sizeof(buf)); |
| 1229 | if (sz == -1) { |
| 1230 | /* |
| 1231 | * If we get EAGAIN, No data is currently available. |
| 1232 | * Do not treat this as an error. |
| 1233 | */ |
| 1234 | if (errno(*__errno()) != EAGAIN35) |
| 1235 | log_warn("unexpected read error on vionet " |
| 1236 | "device"); |
| 1237 | } else if (sz > 0) { |
| 1238 | eh = (struct ether_header *)buf; |
| 1239 | if (!dev->lockedmac || |
| 1240 | ETHER_IS_MULTICAST(eh->ether_dhost)(*(eh->ether_dhost) & 0x01) || |
| 1241 | memcmp(eh->ether_dhost, dev->mac, |
| 1242 | sizeof(eh->ether_dhost)) == 0) |
| 1243 | num_enq += vionet_enq_rx(dev, buf, sz, &spc); |
| 1244 | } else if (sz == 0) { |
| 1245 | log_debug("process_rx: no data"); |
| 1246 | break; |
| 1247 | } |
| 1248 | } while (spc > 0 && sz > 0); |
| 1249 | |
| 1250 | return (num_enq); |
| 1251 | } |
| 1252 | |
| 1253 | /* |
| 1254 | * vionet_rx_event |
| 1255 | * |
| 1256 | * Called from the event handling thread when new data can be |
| 1257 | * received on the tap fd of a vionet device. |
| 1258 | */ |
| 1259 | static void |
| 1260 | vionet_rx_event(int fd, short kind, void *arg) |
| 1261 | { |
| 1262 | struct vionet_dev *dev = arg; |
| 1263 | |
| 1264 | mutex_lock(&dev->mutex); |
| 1265 | |
| 1266 | if (vionet_rx(dev) > 0) { |
| 1267 | /* XXX: vcpu_id */ |
| 1268 | vcpu_assert_pic_irq(dev->vm_id, 0, dev->irq); |
| 1269 | } |
| 1270 | |
| 1271 | mutex_unlock(&dev->mutex); |
| 1272 | } |
| 1273 | |
| 1274 | /* |
| 1275 | * Must be called with dev->mutex acquired. |
| 1276 | */ |
| 1277 | void |
| 1278 | vionet_notify_rx(struct vionet_dev *dev) |
| 1279 | { |
| 1280 | uint64_t q_gpa; |
| 1281 | uint32_t vr_sz; |
| 1282 | char *vr; |
| 1283 | struct vring_avail *avail; |
| 1284 | |
| 1285 | vr_sz = vring_size(VIONET_QUEUE_SIZE256); |
| 1286 | q_gpa = dev->vq[RXQ0].qa; |
| 1287 | q_gpa = q_gpa * VIRTIO_PAGE_SIZE(4096); |
| 1288 | |
| 1289 | vr = malloc(vr_sz); |
| 1290 | if (vr == NULL((void*)0)) { |
| 1291 | log_warn("malloc error getting vionet ring"); |
| 1292 | return; |
| 1293 | } |
| 1294 | |
| 1295 | if (read_mem(q_gpa, vr, vr_sz)) { |
| 1296 | log_warnx("error reading gpa 0x%llx", q_gpa); |
| 1297 | free(vr); |
| 1298 | return; |
| 1299 | } |
| 1300 | |
| 1301 | /* Compute offset into avail ring */ |
| 1302 | avail = (struct vring_avail *)(vr + dev->vq[RXQ0].vq_availoffset); |
| 1303 | |
| 1304 | dev->vq[RXQ0].notified_avail = avail->idx - 1; |
| 1305 | |
| 1306 | free(vr); |
| 1307 | } |
| 1308 | |
| 1309 | /* |
| 1310 | * Must be called with dev->mutex acquired. |
| 1311 | */ |
| 1312 | int |
| 1313 | vionet_notifyq(struct vionet_dev *dev) |
| 1314 | { |
| 1315 | int ret; |
| 1316 | |
| 1317 | switch (dev->cfg.queue_notify) { |
| 1318 | case RXQ0: |
| 1319 | vionet_notify_rx(dev); |
| 1320 | ret = 0; |
| 1321 | break; |
| 1322 | case TXQ1: |
| 1323 | ret = vionet_notify_tx(dev); |
| 1324 | break; |
| 1325 | default: |
| 1326 | /* |
| 1327 | * Catch the unimplemented queue ID 2 (control queue) as |
| 1328 | * well as any bogus queue IDs. |
| 1329 | */ |
| 1330 | log_debug("%s: notify for unimplemented queue ID %d", |
| 1331 | __func__, dev->cfg.queue_notify); |
| 1332 | ret = 0; |
| 1333 | break; |
| 1334 | } |
| 1335 | |
| 1336 | return (ret); |
| 1337 | } |
| 1338 | |
| 1339 | /* |
| 1340 | * Must be called with dev->mutex acquired. |
| 1341 | */ |
| 1342 | int |
| 1343 | vionet_notify_tx(struct vionet_dev *dev) |
| 1344 | { |
| 1345 | uint64_t q_gpa; |
| 1346 | uint32_t vr_sz; |
| 1347 | uint16_t idx, pkt_desc_idx, hdr_desc_idx, dxx, cnt; |
| 1348 | size_t pktsz, chunk_size = 0; |
| 1349 | ssize_t dhcpsz; |
| 1350 | int ret, num_enq, ofs, spc; |
| 1351 | char *vr, *pkt, *dhcppkt; |
| 1352 | struct vring_desc *desc, *pkt_desc, *hdr_desc; |
| 1353 | struct vring_avail *avail; |
| 1354 | struct vring_used *used; |
| 1355 | struct ether_header *eh; |
| 1356 | |
| 1357 | dhcpsz = 0; |
| 1358 | vr = pkt = dhcppkt = NULL((void*)0); |
| 1359 | ret = spc = 0; |
| 1360 | |
| 1361 | vr_sz = vring_size(VIONET_QUEUE_SIZE256); |
| 1362 | q_gpa = dev->vq[TXQ1].qa; |
| 1363 | q_gpa = q_gpa * VIRTIO_PAGE_SIZE(4096); |
| 1364 | |
| 1365 | vr = calloc(1, vr_sz); |
| 1366 | if (vr == NULL((void*)0)) { |
| 1367 | log_warn("calloc error getting vionet ring"); |
| 1368 | goto out; |
| 1369 | } |
| 1370 | |
| 1371 | if (read_mem(q_gpa, vr, vr_sz)) { |
| 1372 | log_warnx("error reading gpa 0x%llx", q_gpa); |
| 1373 | goto out; |
| 1374 | } |
| 1375 | |
| 1376 | /* Compute offsets in ring of descriptors, avail ring, and used ring */ |
| 1377 | desc = (struct vring_desc *)(vr); |
| 1378 | avail = (struct vring_avail *)(vr + dev->vq[TXQ1].vq_availoffset); |
| 1379 | used = (struct vring_used *)(vr + dev->vq[TXQ1].vq_usedoffset); |
| 1380 | |
| 1381 | num_enq = 0; |
| 1382 | |
| 1383 | idx = dev->vq[TXQ1].last_avail & VIONET_QUEUE_MASK(256 - 1); |
| 1384 | |
| 1385 | if ((avail->idx & VIONET_QUEUE_MASK(256 - 1)) == idx) { |
| 1386 | log_warnx("vionet tx queue notify - nothing to do?"); |
| 1387 | goto out; |
| 1388 | } |
| 1389 | |
| 1390 | while ((avail->idx & VIONET_QUEUE_MASK(256 - 1)) != idx) { |
| 1391 | hdr_desc_idx = avail->ring[idx] & VIONET_QUEUE_MASK(256 - 1); |
| 1392 | hdr_desc = &desc[hdr_desc_idx]; |
| 1393 | pktsz = 0; |
| 1394 | |
| 1395 | cnt = 0; |
| 1396 | dxx = hdr_desc_idx; |
| 1397 | do { |
| 1398 | pktsz += desc[dxx].len; |
| 1399 | dxx = desc[dxx].next & VIONET_QUEUE_MASK(256 - 1); |
| 1400 | |
| 1401 | /* |
| 1402 | * Virtio 1.0, cs04, section 2.4.5: |
| 1403 | * "The number of descriptors in the table is defined |
| 1404 | * by the queue size for this virtqueue: this is the |
| 1405 | * maximum possible descriptor chain length." |
| 1406 | */ |
| 1407 | if (++cnt >= VIONET_QUEUE_SIZE256) { |
| 1408 | log_warnx("%s: descriptor table invalid", |
| 1409 | __func__); |
| 1410 | goto out; |
| 1411 | } |
| 1412 | } while (desc[dxx].flags & VRING_DESC_F_NEXT1); |
| 1413 | |
| 1414 | pktsz += desc[dxx].len; |
| 1415 | |
| 1416 | /* Remove virtio header descriptor len */ |
| 1417 | pktsz -= hdr_desc->len; |
| 1418 | |
| 1419 | /* Drop packets violating device MTU-based limits */ |
| 1420 | if (pktsz < VIONET_MIN_TXLEN((6 * 2) + 2) || pktsz > VIONET_MAX_TXLEN16384 + ((6 * 2) + 2)) { |
| 1421 | log_warnx("%s: invalid packet size %lu", __func__, |
| 1422 | pktsz); |
| 1423 | goto drop_packet; |
| 1424 | } |
| 1425 | pkt = malloc(pktsz); |
| 1426 | if (pkt == NULL((void*)0)) { |
| 1427 | log_warn("malloc error alloc packet buf"); |
| 1428 | goto out; |
| 1429 | } |
| 1430 | |
| 1431 | ofs = 0; |
| 1432 | pkt_desc_idx = hdr_desc->next & VIONET_QUEUE_MASK(256 - 1); |
| 1433 | pkt_desc = &desc[pkt_desc_idx]; |
| 1434 | |
| 1435 | while (pkt_desc->flags & VRING_DESC_F_NEXT1) { |
| 1436 | /* must be not writable */ |
| 1437 | if (pkt_desc->flags & VRING_DESC_F_WRITE2) { |
| 1438 | log_warnx("unexpected writable tx desc " |
| 1439 | "%d", pkt_desc_idx); |
| 1440 | goto out; |
| 1441 | } |
| 1442 | |
| 1443 | /* Check we don't read beyond allocated pktsz */ |
| 1444 | if (pkt_desc->len > pktsz - ofs) { |
| 1445 | log_warnx("%s: descriptor len past pkt len", |
| 1446 | __func__); |
| 1447 | chunk_size = pktsz - ofs; |
| 1448 | } else |
| 1449 | chunk_size = pkt_desc->len; |
| 1450 | |
| 1451 | /* Read packet from descriptor ring */ |
| 1452 | if (read_mem(pkt_desc->addr, pkt + ofs, chunk_size)) { |
| 1453 | log_warnx("vionet: packet read_mem error " |
| 1454 | "@ 0x%llx", pkt_desc->addr); |
| 1455 | goto out; |
| 1456 | } |
| 1457 | |
| 1458 | ofs += pkt_desc->len; |
| 1459 | pkt_desc_idx = pkt_desc->next & VIONET_QUEUE_MASK(256 - 1); |
| 1460 | pkt_desc = &desc[pkt_desc_idx]; |
| 1461 | } |
| 1462 | |
| 1463 | /* Now handle tail descriptor - must be not writable */ |
| 1464 | if (pkt_desc->flags & VRING_DESC_F_WRITE2) { |
| 1465 | log_warnx("unexpected writable tx descriptor %d", |
| 1466 | pkt_desc_idx); |
| 1467 | goto out; |
| 1468 | } |
| 1469 | |
| 1470 | /* Check we don't read beyond allocated pktsz */ |
| 1471 | if (pkt_desc->len > pktsz - ofs) { |
| 1472 | log_warnx("%s: descriptor len past pkt len", __func__); |
| 1473 | chunk_size = pktsz - ofs - pkt_desc->len; |
| 1474 | } else |
| 1475 | chunk_size = pkt_desc->len; |
| 1476 | |
| 1477 | /* Read packet from descriptor ring */ |
| 1478 | if (read_mem(pkt_desc->addr, pkt + ofs, chunk_size)) { |
| 1479 | log_warnx("vionet: packet read_mem error @ " |
| 1480 | "0x%llx", pkt_desc->addr); |
| 1481 | goto out; |
| 1482 | } |
| 1483 | |
| 1484 | /* reject other source addresses */ |
| 1485 | if (dev->lockedmac && pktsz >= ETHER_HDR_LEN((6 * 2) + 2) && |
| 1486 | (eh = (struct ether_header *)pkt) && |
| 1487 | memcmp(eh->ether_shost, dev->mac, |
| 1488 | sizeof(eh->ether_shost)) != 0) |
| 1489 | log_debug("vionet: wrong source address %s for vm %d", |
| 1490 | ether_ntoa((struct ether_addr *) |
| 1491 | eh->ether_shost), dev->vm_id); |
| 1492 | else if (dev->local && |
| 1493 | (dhcpsz = dhcp_request(dev, pkt, pktsz, &dhcppkt)) != -1) { |
| 1494 | log_debug("vionet: dhcp request," |
| 1495 | " local response size %zd", dhcpsz); |
| 1496 | |
| 1497 | /* XXX signed vs unsigned here, funky cast */ |
| 1498 | } else if (write(dev->fd, pkt, pktsz) != (int)pktsz) { |
| 1499 | log_warnx("vionet: tx failed writing to tap: " |
| 1500 | "%d", errno(*__errno())); |
| 1501 | goto out; |
| 1502 | } |
| 1503 | |
| 1504 | drop_packet: |
| 1505 | ret = 1; |
| 1506 | dev->cfg.isr_status = 1; |
| 1507 | used->ring[used->idx & VIONET_QUEUE_MASK(256 - 1)].id = hdr_desc_idx; |
| 1508 | used->ring[used->idx & VIONET_QUEUE_MASK(256 - 1)].len = hdr_desc->len; |
| 1509 | used->idx++; |
| 1510 | |
| 1511 | dev->vq[TXQ1].last_avail++; |
| 1512 | num_enq++; |
| 1513 | |
| 1514 | idx = dev->vq[TXQ1].last_avail & VIONET_QUEUE_MASK(256 - 1); |
| 1515 | |
| 1516 | free(pkt); |
| 1517 | pkt = NULL((void*)0); |
| 1518 | } |
| 1519 | |
| 1520 | if (write_mem(q_gpa, vr, vr_sz)) { |
| 1521 | log_warnx("vionet: tx error writing vio ring"); |
| 1522 | } |
| 1523 | |
| 1524 | if (dhcpsz > 0) { |
| 1525 | if (vionet_enq_rx(dev, dhcppkt, dhcpsz, &spc)) |
| 1526 | ret = 1; |
| 1527 | } |
| 1528 | |
| 1529 | out: |
| 1530 | free(vr); |
| 1531 | free(pkt); |
| 1532 | free(dhcppkt); |
| 1533 | |
| 1534 | return (ret); |
| 1535 | } |
| 1536 | |
| 1537 | int |
| 1538 | vmmci_ctl(unsigned int cmd) |
| 1539 | { |
| 1540 | struct timeval tv = { 0, 0 }; |
| 1541 | |
| 1542 | if ((vmmci.cfg.device_status & |
| 1543 | VIRTIO_CONFIG_DEVICE_STATUS_DRIVER_OK4) == 0) |
| 1544 | return (-1); |
| 1545 | |
| 1546 | if (cmd == vmmci.cmd) |
| 1547 | return (0); |
| 1548 | |
| 1549 | switch (cmd) { |
| 1550 | case VMMCI_NONE: |
| 1551 | break; |
| 1552 | case VMMCI_SHUTDOWN: |
| 1553 | case VMMCI_REBOOT: |
| 1554 | /* Update command */ |
| 1555 | vmmci.cmd = cmd; |
| 1556 | |
| 1557 | /* |
| 1558 | * vmm VMs do not support powerdown, send a reboot request |
| 1559 | * instead and turn it off after the triple fault. |
| 1560 | */ |
| 1561 | if (cmd == VMMCI_SHUTDOWN) |
| 1562 | cmd = VMMCI_REBOOT; |
Value stored to 'cmd' is never read | |
| 1563 | |
| 1564 | /* Trigger interrupt */ |
| 1565 | vmmci.cfg.isr_status = VIRTIO_CONFIG_ISR_CONFIG_CHANGE2; |
| 1566 | vcpu_assert_pic_irq(vmmci.vm_id, 0, vmmci.irq); |
| 1567 | |
| 1568 | /* Add ACK timeout */ |
| 1569 | tv.tv_sec = VMMCI_TIMEOUT3; |
| 1570 | evtimer_add(&vmmci.timeout, &tv)event_add(&vmmci.timeout, &tv); |
| 1571 | break; |
| 1572 | case VMMCI_SYNCRTC: |
| 1573 | if (vmmci.cfg.guest_feature & VMMCI_F_SYNCRTC(1<<2)) { |
| 1574 | /* RTC updated, request guest VM resync of its RTC */ |
| 1575 | vmmci.cmd = cmd; |
| 1576 | |
| 1577 | vmmci.cfg.isr_status = VIRTIO_CONFIG_ISR_CONFIG_CHANGE2; |
| 1578 | vcpu_assert_pic_irq(vmmci.vm_id, 0, vmmci.irq); |
| 1579 | } else { |
| 1580 | log_debug("%s: RTC sync skipped (guest does not " |
| 1581 | "support RTC sync)\n", __func__); |
| 1582 | } |
| 1583 | break; |
| 1584 | default: |
| 1585 | fatalx("invalid vmmci command: %d", cmd); |
| 1586 | } |
| 1587 | |
| 1588 | return (0); |
| 1589 | } |
| 1590 | |
| 1591 | void |
| 1592 | vmmci_ack(unsigned int cmd) |
| 1593 | { |
| 1594 | struct timeval tv = { 0, 0 }; |
| 1595 | |
| 1596 | switch (cmd) { |
| 1597 | case VMMCI_NONE: |
| 1598 | break; |
| 1599 | case VMMCI_SHUTDOWN: |
| 1600 | /* |
| 1601 | * The shutdown was requested by the VM if we don't have |
| 1602 | * a pending shutdown request. In this case add a short |
| 1603 | * timeout to give the VM a chance to reboot before the |
| 1604 | * timer is expired. |
| 1605 | */ |
| 1606 | if (vmmci.cmd == 0) { |
| 1607 | log_debug("%s: vm %u requested shutdown", __func__, |
| 1608 | vmmci.vm_id); |
| 1609 | tv.tv_sec = VMMCI_TIMEOUT3; |
| 1610 | evtimer_add(&vmmci.timeout, &tv)event_add(&vmmci.timeout, &tv); |
| 1611 | return; |
| 1612 | } |
| 1613 | /* FALLTHROUGH */ |
| 1614 | case VMMCI_REBOOT: |
| 1615 | /* |
| 1616 | * If the VM acknowleged our shutdown request, give it |
| 1617 | * enough time to shutdown or reboot gracefully. This |
| 1618 | * might take a considerable amount of time (running |
| 1619 | * rc.shutdown on the VM), so increase the timeout before |
| 1620 | * killing it forcefully. |
| 1621 | */ |
| 1622 | if (cmd == vmmci.cmd && |
| 1623 | evtimer_pending(&vmmci.timeout, NULL)event_pending(&vmmci.timeout, 0x01, ((void*)0))) { |
| 1624 | log_debug("%s: vm %u acknowledged shutdown request", |
| 1625 | __func__, vmmci.vm_id); |
| 1626 | tv.tv_sec = VMMCI_SHUTDOWN_TIMEOUT120; |
| 1627 | evtimer_add(&vmmci.timeout, &tv)event_add(&vmmci.timeout, &tv); |
| 1628 | } |
| 1629 | break; |
| 1630 | case VMMCI_SYNCRTC: |
| 1631 | log_debug("%s: vm %u acknowledged RTC sync request", |
| 1632 | __func__, vmmci.vm_id); |
| 1633 | vmmci.cmd = VMMCI_NONE; |
| 1634 | break; |
| 1635 | default: |
| 1636 | log_warnx("%s: illegal request %u", __func__, cmd); |
| 1637 | break; |
| 1638 | } |
| 1639 | } |
| 1640 | |
| 1641 | void |
| 1642 | vmmci_timeout(int fd, short type, void *arg) |
| 1643 | { |
| 1644 | log_debug("%s: vm %u shutdown", __progname, vmmci.vm_id); |
| 1645 | vm_shutdown(vmmci.cmd == VMMCI_REBOOT ? VMMCI_REBOOT : VMMCI_SHUTDOWN); |
| 1646 | } |
| 1647 | |
| 1648 | int |
| 1649 | vmmci_io(int dir, uint16_t reg, uint32_t *data, uint8_t *intr, |
| 1650 | void *unused, uint8_t sz) |
| 1651 | { |
| 1652 | *intr = 0xFF; |
| 1653 | |
| 1654 | if (dir == 0) { |
| 1655 | switch (reg) { |
| 1656 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 1657 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 1658 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 1659 | log_warnx("%s: illegal write %x to %s", |
| 1660 | __progname, *data, virtio_reg_name(reg)); |
| 1661 | break; |
| 1662 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 1663 | vmmci.cfg.guest_feature = *data; |
| 1664 | break; |
| 1665 | case VIRTIO_CONFIG_QUEUE_ADDRESS8: |
| 1666 | vmmci.cfg.queue_address = *data; |
| 1667 | break; |
| 1668 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 1669 | vmmci.cfg.queue_select = *data; |
| 1670 | break; |
| 1671 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 1672 | vmmci.cfg.queue_notify = *data; |
| 1673 | break; |
| 1674 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 1675 | vmmci.cfg.device_status = *data; |
| 1676 | break; |
| 1677 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20: |
| 1678 | vmmci_ack(*data); |
| 1679 | break; |
| 1680 | } |
| 1681 | } else { |
| 1682 | switch (reg) { |
| 1683 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20: |
| 1684 | *data = vmmci.cmd; |
| 1685 | break; |
| 1686 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 4: |
| 1687 | /* Update time once when reading the first register */ |
| 1688 | gettimeofday(&vmmci.time, NULL((void*)0)); |
| 1689 | *data = (uint64_t)vmmci.time.tv_sec; |
| 1690 | break; |
| 1691 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 8: |
| 1692 | *data = (uint64_t)vmmci.time.tv_sec << 32; |
| 1693 | break; |
| 1694 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 12: |
| 1695 | *data = (uint64_t)vmmci.time.tv_usec; |
| 1696 | break; |
| 1697 | case VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI20 + 16: |
| 1698 | *data = (uint64_t)vmmci.time.tv_usec << 32; |
| 1699 | break; |
| 1700 | case VIRTIO_CONFIG_DEVICE_FEATURES0: |
| 1701 | *data = vmmci.cfg.device_feature; |
| 1702 | break; |
| 1703 | case VIRTIO_CONFIG_GUEST_FEATURES4: |
| 1704 | *data = vmmci.cfg.guest_feature; |
| 1705 | break; |
| 1706 | case VIRTIO_CONFIG_QUEUE_ADDRESS8: |
| 1707 | *data = vmmci.cfg.queue_address; |
| 1708 | break; |
| 1709 | case VIRTIO_CONFIG_QUEUE_SIZE12: |
| 1710 | *data = vmmci.cfg.queue_size; |
| 1711 | break; |
| 1712 | case VIRTIO_CONFIG_QUEUE_SELECT14: |
| 1713 | *data = vmmci.cfg.queue_select; |
| 1714 | break; |
| 1715 | case VIRTIO_CONFIG_QUEUE_NOTIFY16: |
| 1716 | *data = vmmci.cfg.queue_notify; |
| 1717 | break; |
| 1718 | case VIRTIO_CONFIG_DEVICE_STATUS18: |
| 1719 | *data = vmmci.cfg.device_status; |
| 1720 | break; |
| 1721 | case VIRTIO_CONFIG_ISR_STATUS19: |
| 1722 | *data = vmmci.cfg.isr_status; |
| 1723 | vmmci.cfg.isr_status = 0; |
| 1724 | vcpu_deassert_pic_irq(vmmci.vm_id, 0, vmmci.irq); |
| 1725 | break; |
| 1726 | } |
| 1727 | } |
| 1728 | return (0); |
| 1729 | } |
| 1730 | |
| 1731 | int |
| 1732 | virtio_get_base(int fd, char *path, size_t npath, int type, const char *dpath) |
| 1733 | { |
| 1734 | switch (type) { |
| 1735 | case VMDF_RAW0x01: |
| 1736 | return 0; |
| 1737 | case VMDF_QCOW20x02: |
| 1738 | return virtio_qcow2_get_base(fd, path, npath, dpath); |
| 1739 | } |
| 1740 | log_warnx("%s: invalid disk format", __func__); |
| 1741 | return -1; |
| 1742 | } |
| 1743 | |
| 1744 | /* |
| 1745 | * Initializes a struct virtio_backing using the list of fds. |
| 1746 | */ |
| 1747 | static int |
| 1748 | virtio_init_disk(struct virtio_backing *file, off_t *sz, |
| 1749 | int *fd, size_t nfd, int type) |
| 1750 | { |
| 1751 | /* |
| 1752 | * probe disk types in order of preference, first one to work wins. |
| 1753 | * TODO: provide a way of specifying the type and options. |
| 1754 | */ |
| 1755 | switch (type) { |
| 1756 | case VMDF_RAW0x01: |
| 1757 | return virtio_raw_init(file, sz, fd, nfd); |
| 1758 | case VMDF_QCOW20x02: |
| 1759 | return virtio_qcow2_init(file, sz, fd, nfd); |
| 1760 | } |
| 1761 | log_warnx("%s: invalid disk format", __func__); |
| 1762 | return -1; |
| 1763 | } |
| 1764 | |
| 1765 | void |
| 1766 | virtio_init(struct vmd_vm *vm, int child_cdrom, |
| 1767 | int child_disks[][VM_MAX_BASE_PER_DISK4], int *child_taps) |
| 1768 | { |
| 1769 | struct vmop_create_params *vmc = &vm->vm_params; |
| 1770 | struct vm_create_params *vcp = &vmc->vmc_params; |
| 1771 | uint8_t id; |
| 1772 | uint8_t i; |
| 1773 | int ret; |
| 1774 | |
| 1775 | /* Virtio entropy device */ |
| 1776 | if (pci_add_device(&id, PCI_VENDOR_QUMRANET0x1af4, |
| 1777 | PCI_PRODUCT_QUMRANET_VIO_RNG0x1005, PCI_CLASS_SYSTEM0x08, |
| 1778 | PCI_SUBCLASS_SYSTEM_MISC0x80, |
| 1779 | PCI_VENDOR_OPENBSD0x0b5d, |
| 1780 | PCI_PRODUCT_VIRTIO_ENTROPY4, 1, NULL((void*)0))) { |
| 1781 | log_warnx("%s: can't add PCI virtio rng device", |
| 1782 | __progname); |
| 1783 | return; |
| 1784 | } |
| 1785 | |
| 1786 | if (pci_add_bar(id, PCI_MAPREG_TYPE_IO0x00000001, virtio_rnd_io, NULL((void*)0))) { |
| 1787 | log_warnx("%s: can't add bar for virtio rng device", |
| 1788 | __progname); |
| 1789 | return; |
| 1790 | } |
| 1791 | |
| 1792 | memset(&viornd, 0, sizeof(viornd)); |
| 1793 | viornd.vq[0].qs = VIORND_QUEUE_SIZE64; |
| 1794 | viornd.vq[0].vq_availoffset = sizeof(struct vring_desc) * |
| 1795 | VIORND_QUEUE_SIZE64; |
| 1796 | viornd.vq[0].vq_usedoffset = VIRTQUEUE_ALIGN((((sizeof(struct vring_desc) * 64 + sizeof(uint16_t) * (2 + 64 ))+((4096)-1))& ~((4096)-1)) |
| 1797 | sizeof(struct vring_desc) * VIORND_QUEUE_SIZE(((sizeof(struct vring_desc) * 64 + sizeof(uint16_t) * (2 + 64 ))+((4096)-1))& ~((4096)-1)) |
| 1798 | + sizeof(uint16_t) * (2 + VIORND_QUEUE_SIZE))(((sizeof(struct vring_desc) * 64 + sizeof(uint16_t) * (2 + 64 ))+((4096)-1))& ~((4096)-1)); |
| 1799 | viornd.pci_id = id; |
| 1800 | viornd.irq = pci_get_dev_irq(id); |
| 1801 | viornd.vm_id = vcp->vcp_id; |
| 1802 | |
| 1803 | if (vcp->vcp_nnics > 0) { |
| 1804 | vionet = calloc(vcp->vcp_nnics, sizeof(struct vionet_dev)); |
| 1805 | if (vionet == NULL((void*)0)) { |
| 1806 | log_warn("%s: calloc failure allocating vionets", |
| 1807 | __progname); |
| 1808 | return; |
| 1809 | } |
| 1810 | |
| 1811 | nr_vionet = vcp->vcp_nnics; |
| 1812 | /* Virtio network */ |
| 1813 | for (i = 0; i < vcp->vcp_nnics; i++) { |
| 1814 | if (pci_add_device(&id, PCI_VENDOR_QUMRANET0x1af4, |
| 1815 | PCI_PRODUCT_QUMRANET_VIO_NET0x1000, PCI_CLASS_SYSTEM0x08, |
| 1816 | PCI_SUBCLASS_SYSTEM_MISC0x80, |
| 1817 | PCI_VENDOR_OPENBSD0x0b5d, |
| 1818 | PCI_PRODUCT_VIRTIO_NETWORK1, 1, NULL((void*)0))) { |
| 1819 | log_warnx("%s: can't add PCI virtio net device", |
| 1820 | __progname); |
| 1821 | return; |
| 1822 | } |
| 1823 | |
| 1824 | if (pci_add_bar(id, PCI_MAPREG_TYPE_IO0x00000001, virtio_net_io, |
| 1825 | &vionet[i])) { |
| 1826 | log_warnx("%s: can't add bar for virtio net " |
| 1827 | "device", __progname); |
| 1828 | return; |
| 1829 | } |
| 1830 | |
| 1831 | ret = pthread_mutex_init(&vionet[i].mutex, NULL((void*)0)); |
| 1832 | if (ret) { |
| 1833 | errno(*__errno()) = ret; |
| 1834 | log_warn("%s: could not initialize mutex " |
| 1835 | "for vionet device", __progname); |
| 1836 | return; |
| 1837 | } |
| 1838 | |
| 1839 | vionet[i].vq[RXQ0].qs = VIONET_QUEUE_SIZE256; |
| 1840 | vionet[i].vq[RXQ0].vq_availoffset = |
| 1841 | sizeof(struct vring_desc) * VIONET_QUEUE_SIZE256; |
| 1842 | vionet[i].vq[RXQ0].vq_usedoffset = VIRTQUEUE_ALIGN((((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)) |
| 1843 | sizeof(struct vring_desc) * VIONET_QUEUE_SIZE(((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)) |
| 1844 | + sizeof(uint16_t) * (2 + VIONET_QUEUE_SIZE))(((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)); |
| 1845 | vionet[i].vq[RXQ0].last_avail = 0; |
| 1846 | vionet[i].vq[RXQ0].notified_avail = 0; |
| 1847 | |
| 1848 | vionet[i].vq[TXQ1].qs = VIONET_QUEUE_SIZE256; |
| 1849 | vionet[i].vq[TXQ1].vq_availoffset = |
| 1850 | sizeof(struct vring_desc) * VIONET_QUEUE_SIZE256; |
| 1851 | vionet[i].vq[TXQ1].vq_usedoffset = VIRTQUEUE_ALIGN((((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)) |
| 1852 | sizeof(struct vring_desc) * VIONET_QUEUE_SIZE(((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)) |
| 1853 | + sizeof(uint16_t) * (2 + VIONET_QUEUE_SIZE))(((sizeof(struct vring_desc) * 256 + sizeof(uint16_t) * (2 + 256 ))+((4096)-1))& ~((4096)-1)); |
| 1854 | vionet[i].vq[TXQ1].last_avail = 0; |
| 1855 | vionet[i].vq[TXQ1].notified_avail = 0; |
| 1856 | vionet[i].fd = child_taps[i]; |
| 1857 | vionet[i].vm_id = vcp->vcp_id; |
| 1858 | vionet[i].vm_vmid = vm->vm_vmid; |
| 1859 | vionet[i].irq = pci_get_dev_irq(id); |
| 1860 | |
| 1861 | event_set(&vionet[i].event, vionet[i].fd, |
| 1862 | EV_READ0x02 | EV_PERSIST0x10, vionet_rx_event, &vionet[i]); |
| 1863 | if (event_add(&vionet[i].event, NULL((void*)0))) { |
| 1864 | log_warn("could not initialize vionet event " |
| 1865 | "handler"); |
| 1866 | return; |
| 1867 | } |
| 1868 | |
| 1869 | /* MAC address has been assigned by the parent */ |
| 1870 | memcpy(&vionet[i].mac, &vcp->vcp_macs[i], 6); |
| 1871 | vionet[i].cfg.device_feature = VIRTIO_NET_F_MAC(1<<5); |
| 1872 | |
| 1873 | vionet[i].lockedmac = |
| 1874 | vmc->vmc_ifflags[i] & VMIFF_LOCKED0x02 ? 1 : 0; |
| 1875 | vionet[i].local = |
| 1876 | vmc->vmc_ifflags[i] & VMIFF_LOCAL0x04 ? 1 : 0; |
| 1877 | if (i == 0 && vmc->vmc_bootdevice & VMBOOTDEV_NET3) |
| 1878 | vionet[i].pxeboot = 1; |
| 1879 | vionet[i].idx = i; |
| 1880 | vionet[i].pci_id = id; |
| 1881 | |
| 1882 | log_debug("%s: vm \"%s\" vio%u lladdr %s%s%s%s", |
| 1883 | __func__, vcp->vcp_name, i, |
| 1884 | ether_ntoa((void *)vionet[i].mac), |
| 1885 | vionet[i].lockedmac ? ", locked" : "", |
| 1886 | vionet[i].local ? ", local" : "", |
| 1887 | vionet[i].pxeboot ? ", pxeboot" : ""); |
| 1888 | } |
| 1889 | } |
| 1890 | |
| 1891 | if (vcp->vcp_ndisks > 0) { |
| 1892 | nr_vioblk = vcp->vcp_ndisks; |
| 1893 | vioblk = calloc(vcp->vcp_ndisks, sizeof(struct vioblk_dev)); |
| 1894 | if (vioblk == NULL((void*)0)) { |
| 1895 | log_warn("%s: calloc failure allocating vioblks", |
| 1896 | __progname); |
| 1897 | return; |
| 1898 | } |
| 1899 | |
| 1900 | /* One virtio block device for each disk defined in vcp */ |
| 1901 | for (i = 0; i < vcp->vcp_ndisks; i++) { |
| 1902 | if (pci_add_device(&id, PCI_VENDOR_QUMRANET0x1af4, |
| 1903 | PCI_PRODUCT_QUMRANET_VIO_BLOCK0x1001, |
| 1904 | PCI_CLASS_MASS_STORAGE0x01, |
| 1905 | PCI_SUBCLASS_MASS_STORAGE_SCSI0x00, |
| 1906 | PCI_VENDOR_OPENBSD0x0b5d, |
| 1907 | PCI_PRODUCT_VIRTIO_BLOCK2, 1, NULL((void*)0))) { |
| 1908 | log_warnx("%s: can't add PCI virtio block " |
| 1909 | "device", __progname); |
| 1910 | return; |
| 1911 | } |
| 1912 | if (pci_add_bar(id, PCI_MAPREG_TYPE_IO0x00000001, virtio_blk_io, |
| 1913 | &vioblk[i])) { |
| 1914 | log_warnx("%s: can't add bar for virtio block " |
| 1915 | "device", __progname); |
| 1916 | return; |
| 1917 | } |
| 1918 | vioblk[i].vq[0].qs = VIOBLK_QUEUE_SIZE128; |
| 1919 | vioblk[i].vq[0].vq_availoffset = |
| 1920 | sizeof(struct vring_desc) * VIOBLK_QUEUE_SIZE128; |
| 1921 | vioblk[i].vq[0].vq_usedoffset = VIRTQUEUE_ALIGN((((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)) |
| 1922 | sizeof(struct vring_desc) * VIOBLK_QUEUE_SIZE(((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)) |
| 1923 | + sizeof(uint16_t) * (2 + VIOBLK_QUEUE_SIZE))(((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)); |
| 1924 | vioblk[i].vq[0].last_avail = 0; |
| 1925 | vioblk[i].cfg.device_feature = VIRTIO_BLK_F_SIZE_MAX(1ULL<<1); |
| 1926 | vioblk[i].max_xfer = 1048576; |
| 1927 | vioblk[i].pci_id = id; |
| 1928 | vioblk[i].vm_id = vcp->vcp_id; |
| 1929 | vioblk[i].irq = pci_get_dev_irq(id); |
| 1930 | if (virtio_init_disk(&vioblk[i].file, &vioblk[i].sz, |
| 1931 | child_disks[i], vmc->vmc_diskbases[i], |
| 1932 | vmc->vmc_disktypes[i]) == -1) { |
| 1933 | log_warnx("%s: unable to determine disk format", |
| 1934 | __func__); |
| 1935 | return; |
| 1936 | } |
| 1937 | vioblk[i].sz /= 512; |
| 1938 | } |
| 1939 | } |
| 1940 | |
| 1941 | /* vioscsi cdrom */ |
| 1942 | if (strlen(vcp->vcp_cdrom)) { |
| 1943 | vioscsi = calloc(1, sizeof(struct vioscsi_dev)); |
| 1944 | if (vioscsi == NULL((void*)0)) { |
| 1945 | log_warn("%s: calloc failure allocating vioscsi", |
| 1946 | __progname); |
| 1947 | return; |
| 1948 | } |
| 1949 | |
| 1950 | if (pci_add_device(&id, PCI_VENDOR_QUMRANET0x1af4, |
| 1951 | PCI_PRODUCT_QUMRANET_VIO_SCSI0x1004, |
| 1952 | PCI_CLASS_MASS_STORAGE0x01, |
| 1953 | PCI_SUBCLASS_MASS_STORAGE_SCSI0x00, |
| 1954 | PCI_VENDOR_OPENBSD0x0b5d, |
| 1955 | PCI_PRODUCT_VIRTIO_SCSI8, 1, NULL((void*)0))) { |
| 1956 | log_warnx("%s: can't add PCI vioscsi device", |
| 1957 | __progname); |
| 1958 | return; |
| 1959 | } |
| 1960 | |
| 1961 | if (pci_add_bar(id, PCI_MAPREG_TYPE_IO0x00000001, vioscsi_io, vioscsi)) { |
| 1962 | log_warnx("%s: can't add bar for vioscsi device", |
| 1963 | __progname); |
| 1964 | return; |
| 1965 | } |
| 1966 | |
| 1967 | for ( i = 0; i < VIRTIO_MAX_QUEUES3; i++) { |
| 1968 | vioscsi->vq[i].qs = VIOSCSI_QUEUE_SIZE128; |
| 1969 | vioscsi->vq[i].vq_availoffset = |
| 1970 | sizeof(struct vring_desc) * VIOSCSI_QUEUE_SIZE128; |
| 1971 | vioscsi->vq[i].vq_usedoffset = VIRTQUEUE_ALIGN((((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)) |
| 1972 | sizeof(struct vring_desc) * VIOSCSI_QUEUE_SIZE(((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)) |
| 1973 | + sizeof(uint16_t) * (2 + VIOSCSI_QUEUE_SIZE))(((sizeof(struct vring_desc) * 128 + sizeof(uint16_t) * (2 + 128 ))+((4096)-1))& ~((4096)-1)); |
| 1974 | vioscsi->vq[i].last_avail = 0; |
| 1975 | } |
| 1976 | if (virtio_init_disk(&vioscsi->file, &vioscsi->sz, |
| 1977 | &child_cdrom, 1, VMDF_RAW0x01) == -1) { |
| 1978 | log_warnx("%s: unable to determine iso format", |
| 1979 | __func__); |
| 1980 | return; |
| 1981 | } |
| 1982 | vioscsi->locked = 0; |
| 1983 | vioscsi->lba = 0; |
| 1984 | vioscsi->n_blocks = vioscsi->sz >> 11; /* num of 2048 blocks in file */ |
| 1985 | vioscsi->max_xfer = VIOSCSI_BLOCK_SIZE_CDROM2048; |
| 1986 | vioscsi->pci_id = id; |
| 1987 | vioscsi->vm_id = vcp->vcp_id; |
| 1988 | vioscsi->irq = pci_get_dev_irq(id); |
| 1989 | } |
| 1990 | |
| 1991 | /* virtio control device */ |
| 1992 | if (pci_add_device(&id, PCI_VENDOR_OPENBSD0x0b5d, |
| 1993 | PCI_PRODUCT_OPENBSD_CONTROL0x0777, |
| 1994 | PCI_CLASS_COMMUNICATIONS0x07, |
| 1995 | PCI_SUBCLASS_COMMUNICATIONS_MISC0x80, |
| 1996 | PCI_VENDOR_OPENBSD0x0b5d, |
| 1997 | PCI_PRODUCT_VIRTIO_VMMCI65535, 1, NULL((void*)0))) { |
| 1998 | log_warnx("%s: can't add PCI vmm control device", |
| 1999 | __progname); |
| 2000 | return; |
| 2001 | } |
| 2002 | |
| 2003 | if (pci_add_bar(id, PCI_MAPREG_TYPE_IO0x00000001, vmmci_io, NULL((void*)0))) { |
| 2004 | log_warnx("%s: can't add bar for vmm control device", |
| 2005 | __progname); |
| 2006 | return; |
| 2007 | } |
| 2008 | |
| 2009 | memset(&vmmci, 0, sizeof(vmmci)); |
| 2010 | vmmci.cfg.device_feature = VMMCI_F_TIMESYNC(1<<0) | VMMCI_F_ACK(1<<1) | |
| 2011 | VMMCI_F_SYNCRTC(1<<2); |
| 2012 | vmmci.vm_id = vcp->vcp_id; |
| 2013 | vmmci.irq = pci_get_dev_irq(id); |
| 2014 | vmmci.pci_id = id; |
| 2015 | |
| 2016 | evtimer_set(&vmmci.timeout, vmmci_timeout, NULL)event_set(&vmmci.timeout, -1, 0, vmmci_timeout, ((void*)0 )); |
| 2017 | } |
| 2018 | |
| 2019 | /* |
| 2020 | * vionet_set_hostmac |
| 2021 | * |
| 2022 | * Sets the hardware address for the host-side tap(4) on a vionet_dev. |
| 2023 | * |
| 2024 | * This should only be called from the event-loop thread |
| 2025 | * |
| 2026 | * vm: pointer to the current vmd_vm instance |
| 2027 | * idx: index into the array of vionet_dev's for the target vionet_dev |
| 2028 | * addr: ethernet address to set |
| 2029 | */ |
| 2030 | void |
| 2031 | vionet_set_hostmac(struct vmd_vm *vm, unsigned int idx, uint8_t *addr) |
| 2032 | { |
| 2033 | struct vmop_create_params *vmc = &vm->vm_params; |
| 2034 | struct vm_create_params *vcp = &vmc->vmc_params; |
| 2035 | struct vionet_dev *dev; |
| 2036 | |
| 2037 | if (idx > vcp->vcp_nnics) |
| 2038 | fatalx("vionet_set_hostmac"); |
| 2039 | |
| 2040 | dev = &vionet[idx]; |
| 2041 | memcpy(dev->hostmac, addr, sizeof(dev->hostmac)); |
| 2042 | } |
| 2043 | |
| 2044 | void |
| 2045 | virtio_shutdown(struct vmd_vm *vm) |
| 2046 | { |
| 2047 | int i; |
| 2048 | |
| 2049 | /* ensure that our disks are synced */ |
| 2050 | if (vioscsi != NULL((void*)0)) |
| 2051 | vioscsi->file.close(vioscsi->file.p, 0); |
| 2052 | |
| 2053 | for (i = 0; i < nr_vioblk; i++) |
| 2054 | vioblk[i].file.close(vioblk[i].file.p, 0); |
| 2055 | } |
| 2056 | |
| 2057 | int |
| 2058 | vmmci_restore(int fd, uint32_t vm_id) |
| 2059 | { |
| 2060 | log_debug("%s: receiving vmmci", __func__); |
| 2061 | if (atomicio(read, fd, &vmmci, sizeof(vmmci)) != sizeof(vmmci)) { |
| 2062 | log_warnx("%s: error reading vmmci from fd", __func__); |
| 2063 | return (-1); |
| 2064 | } |
| 2065 | |
| 2066 | if (pci_set_bar_fn(vmmci.pci_id, 0, vmmci_io, NULL((void*)0))) { |
| 2067 | log_warnx("%s: can't set bar fn for vmm control device", |
| 2068 | __progname); |
| 2069 | return (-1); |
| 2070 | } |
| 2071 | vmmci.vm_id = vm_id; |
| 2072 | vmmci.irq = pci_get_dev_irq(vmmci.pci_id); |
| 2073 | memset(&vmmci.timeout, 0, sizeof(struct event)); |
| 2074 | evtimer_set(&vmmci.timeout, vmmci_timeout, NULL)event_set(&vmmci.timeout, -1, 0, vmmci_timeout, ((void*)0 )); |
| 2075 | return (0); |
| 2076 | } |
| 2077 | |
| 2078 | int |
| 2079 | viornd_restore(int fd, struct vm_create_params *vcp) |
| 2080 | { |
| 2081 | log_debug("%s: receiving viornd", __func__); |
| 2082 | if (atomicio(read, fd, &viornd, sizeof(viornd)) != sizeof(viornd)) { |
| 2083 | log_warnx("%s: error reading viornd from fd", __func__); |
| 2084 | return (-1); |
| 2085 | } |
| 2086 | if (pci_set_bar_fn(viornd.pci_id, 0, virtio_rnd_io, NULL((void*)0))) { |
| 2087 | log_warnx("%s: can't set bar fn for virtio rng device", |
| 2088 | __progname); |
| 2089 | return (-1); |
| 2090 | } |
| 2091 | viornd.vm_id = vcp->vcp_id; |
| 2092 | viornd.irq = pci_get_dev_irq(viornd.pci_id); |
| 2093 | |
| 2094 | return (0); |
| 2095 | } |
| 2096 | |
| 2097 | int |
| 2098 | vionet_restore(int fd, struct vmd_vm *vm, int *child_taps) |
| 2099 | { |
| 2100 | struct vmop_create_params *vmc = &vm->vm_params; |
| 2101 | struct vm_create_params *vcp = &vmc->vmc_params; |
| 2102 | uint8_t i; |
| 2103 | int ret; |
| 2104 | |
| 2105 | nr_vionet = vcp->vcp_nnics; |
| 2106 | if (vcp->vcp_nnics > 0) { |
| 2107 | vionet = calloc(vcp->vcp_nnics, sizeof(struct vionet_dev)); |
| 2108 | if (vionet == NULL((void*)0)) { |
| 2109 | log_warn("%s: calloc failure allocating vionets", |
| 2110 | __progname); |
| 2111 | return (-1); |
| 2112 | } |
| 2113 | log_debug("%s: receiving vionet", __func__); |
| 2114 | if (atomicio(read, fd, vionet, |
| 2115 | vcp->vcp_nnics * sizeof(struct vionet_dev)) != |
| 2116 | vcp->vcp_nnics * sizeof(struct vionet_dev)) { |
| 2117 | log_warnx("%s: error reading vionet from fd", |
| 2118 | __func__); |
| 2119 | return (-1); |
| 2120 | } |
| 2121 | |
| 2122 | /* Virtio network */ |
| 2123 | for (i = 0; i < vcp->vcp_nnics; i++) { |
| 2124 | if (pci_set_bar_fn(vionet[i].pci_id, 0, virtio_net_io, |
| 2125 | &vionet[i])) { |
| 2126 | log_warnx("%s: can't set bar fn for virtio net " |
| 2127 | "device", __progname); |
| 2128 | return (-1); |
| 2129 | } |
| 2130 | |
| 2131 | memset(&vionet[i].mutex, 0, sizeof(pthread_mutex_t)); |
| 2132 | ret = pthread_mutex_init(&vionet[i].mutex, NULL((void*)0)); |
| 2133 | |
| 2134 | if (ret) { |
| 2135 | errno(*__errno()) = ret; |
| 2136 | log_warn("%s: could not initialize mutex " |
| 2137 | "for vionet device", __progname); |
| 2138 | return (-1); |
| 2139 | } |
| 2140 | vionet[i].fd = child_taps[i]; |
| 2141 | vionet[i].vm_id = vcp->vcp_id; |
| 2142 | vionet[i].vm_vmid = vm->vm_vmid; |
| 2143 | vionet[i].irq = pci_get_dev_irq(vionet[i].pci_id); |
| 2144 | |
| 2145 | memset(&vionet[i].event, 0, sizeof(struct event)); |
| 2146 | event_set(&vionet[i].event, vionet[i].fd, |
| 2147 | EV_READ0x02 | EV_PERSIST0x10, vionet_rx_event, &vionet[i]); |
| 2148 | } |
| 2149 | } |
| 2150 | return (0); |
| 2151 | } |
| 2152 | |
| 2153 | int |
| 2154 | vioblk_restore(int fd, struct vmop_create_params *vmc, |
| 2155 | int child_disks[][VM_MAX_BASE_PER_DISK4]) |
| 2156 | { |
| 2157 | struct vm_create_params *vcp = &vmc->vmc_params; |
| 2158 | uint8_t i; |
| 2159 | |
| 2160 | nr_vioblk = vcp->vcp_ndisks; |
| 2161 | vioblk = calloc(vcp->vcp_ndisks, sizeof(struct vioblk_dev)); |
| 2162 | if (vioblk == NULL((void*)0)) { |
| 2163 | log_warn("%s: calloc failure allocating vioblks", __progname); |
| 2164 | return (-1); |
| 2165 | } |
| 2166 | log_debug("%s: receiving vioblk", __func__); |
| 2167 | if (atomicio(read, fd, vioblk, |
| 2168 | nr_vioblk * sizeof(struct vioblk_dev)) != |
| 2169 | nr_vioblk * sizeof(struct vioblk_dev)) { |
| 2170 | log_warnx("%s: error reading vioblk from fd", __func__); |
| 2171 | return (-1); |
| 2172 | } |
| 2173 | for (i = 0; i < vcp->vcp_ndisks; i++) { |
| 2174 | if (pci_set_bar_fn(vioblk[i].pci_id, 0, virtio_blk_io, |
| 2175 | &vioblk[i])) { |
| 2176 | log_warnx("%s: can't set bar fn for virtio block " |
| 2177 | "device", __progname); |
| 2178 | return (-1); |
| 2179 | } |
| 2180 | if (virtio_init_disk(&vioblk[i].file, &vioblk[i].sz, |
| 2181 | child_disks[i], vmc->vmc_diskbases[i], |
| 2182 | vmc->vmc_disktypes[i]) == -1) { |
| 2183 | log_warnx("%s: unable to determine disk format", |
| 2184 | __func__); |
| 2185 | return (-1); |
| 2186 | } |
| 2187 | vioblk[i].vm_id = vcp->vcp_id; |
| 2188 | vioblk[i].irq = pci_get_dev_irq(vioblk[i].pci_id); |
| 2189 | } |
| 2190 | return (0); |
| 2191 | } |
| 2192 | |
| 2193 | int |
| 2194 | vioscsi_restore(int fd, struct vm_create_params *vcp, int child_cdrom) |
| 2195 | { |
| 2196 | if (!strlen(vcp->vcp_cdrom)) |
| 2197 | return (0); |
| 2198 | |
| 2199 | vioscsi = calloc(1, sizeof(struct vioscsi_dev)); |
| 2200 | if (vioscsi == NULL((void*)0)) { |
| 2201 | log_warn("%s: calloc failure allocating vioscsi", __progname); |
| 2202 | return (-1); |
| 2203 | } |
| 2204 | |
| 2205 | log_debug("%s: receiving vioscsi", __func__); |
| 2206 | |
| 2207 | if (atomicio(read, fd, vioscsi, sizeof(struct vioscsi_dev)) != |
| 2208 | sizeof(struct vioscsi_dev)) { |
| 2209 | log_warnx("%s: error reading vioscsi from fd", __func__); |
| 2210 | return (-1); |
| 2211 | } |
| 2212 | |
| 2213 | if (pci_set_bar_fn(vioscsi->pci_id, 0, vioscsi_io, vioscsi)) { |
| 2214 | log_warnx("%s: can't set bar fn for vmm control device", |
| 2215 | __progname); |
| 2216 | return (-1); |
| 2217 | } |
| 2218 | |
| 2219 | if (virtio_init_disk(&vioscsi->file, &vioscsi->sz, &child_cdrom, 1, |
| 2220 | VMDF_RAW0x01) == -1) { |
| 2221 | log_warnx("%s: unable to determine iso format", __func__); |
| 2222 | return (-1); |
| 2223 | } |
| 2224 | vioscsi->vm_id = vcp->vcp_id; |
| 2225 | vioscsi->irq = pci_get_dev_irq(vioscsi->pci_id); |
| 2226 | |
| 2227 | return (0); |
| 2228 | } |
| 2229 | |
| 2230 | int |
| 2231 | virtio_restore(int fd, struct vmd_vm *vm, int child_cdrom, |
| 2232 | int child_disks[][VM_MAX_BASE_PER_DISK4], int *child_taps) |
| 2233 | { |
| 2234 | struct vmop_create_params *vmc = &vm->vm_params; |
| 2235 | struct vm_create_params *vcp = &vmc->vmc_params; |
| 2236 | int ret; |
| 2237 | |
| 2238 | if ((ret = viornd_restore(fd, vcp)) == -1) |
| 2239 | return ret; |
| 2240 | |
| 2241 | if ((ret = vioblk_restore(fd, vmc, child_disks)) == -1) |
| 2242 | return ret; |
| 2243 | |
| 2244 | if ((ret = vioscsi_restore(fd, vcp, child_cdrom)) == -1) |
| 2245 | return ret; |
| 2246 | |
| 2247 | if ((ret = vionet_restore(fd, vm, child_taps)) == -1) |
| 2248 | return ret; |
| 2249 | |
| 2250 | if ((ret = vmmci_restore(fd, vcp->vcp_id)) == -1) |
| 2251 | return ret; |
| 2252 | |
| 2253 | return (0); |
| 2254 | } |
| 2255 | |
| 2256 | int |
| 2257 | viornd_dump(int fd) |
| 2258 | { |
| 2259 | log_debug("%s: sending viornd", __func__); |
| 2260 | if (atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, fd, &viornd, sizeof(viornd)) != sizeof(viornd)) { |
| 2261 | log_warnx("%s: error writing viornd to fd", __func__); |
| 2262 | return (-1); |
| 2263 | } |
| 2264 | return (0); |
| 2265 | } |
| 2266 | |
| 2267 | int |
| 2268 | vmmci_dump(int fd) |
| 2269 | { |
| 2270 | log_debug("%s: sending vmmci", __func__); |
| 2271 | if (atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, fd, &vmmci, sizeof(vmmci)) != sizeof(vmmci)) { |
| 2272 | log_warnx("%s: error writing vmmci to fd", __func__); |
| 2273 | return (-1); |
| 2274 | } |
| 2275 | return (0); |
| 2276 | } |
| 2277 | |
| 2278 | int |
| 2279 | vionet_dump(int fd) |
| 2280 | { |
| 2281 | log_debug("%s: sending vionet", __func__); |
| 2282 | if (atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, fd, vionet, |
| 2283 | nr_vionet * sizeof(struct vionet_dev)) != |
| 2284 | nr_vionet * sizeof(struct vionet_dev)) { |
| 2285 | log_warnx("%s: error writing vionet to fd", __func__); |
| 2286 | return (-1); |
| 2287 | } |
| 2288 | return (0); |
| 2289 | } |
| 2290 | |
| 2291 | int |
| 2292 | vioblk_dump(int fd) |
| 2293 | { |
| 2294 | log_debug("%s: sending vioblk", __func__); |
| 2295 | if (atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, fd, vioblk, |
| 2296 | nr_vioblk * sizeof(struct vioblk_dev)) != |
| 2297 | nr_vioblk * sizeof(struct vioblk_dev)) { |
| 2298 | log_warnx("%s: error writing vioblk to fd", __func__); |
| 2299 | return (-1); |
| 2300 | } |
| 2301 | return (0); |
| 2302 | } |
| 2303 | |
| 2304 | int |
| 2305 | vioscsi_dump(int fd) |
| 2306 | { |
| 2307 | if (vioscsi == NULL((void*)0)) |
| 2308 | return (0); |
| 2309 | |
| 2310 | log_debug("%s: sending vioscsi", __func__); |
| 2311 | if (atomicio(vwrite(ssize_t (*)(int, void *, size_t))write, fd, vioscsi, sizeof(struct vioscsi_dev)) != |
| 2312 | sizeof(struct vioscsi_dev)) { |
| 2313 | log_warnx("%s: error writing vioscsi to fd", __func__); |
| 2314 | return (-1); |
| 2315 | } |
| 2316 | return (0); |
| 2317 | } |
| 2318 | |
| 2319 | int |
| 2320 | virtio_dump(int fd) |
| 2321 | { |
| 2322 | int ret; |
| 2323 | |
| 2324 | if ((ret = viornd_dump(fd)) == -1) |
| 2325 | return ret; |
| 2326 | |
| 2327 | if ((ret = vioblk_dump(fd)) == -1) |
| 2328 | return ret; |
| 2329 | |
| 2330 | if ((ret = vioscsi_dump(fd)) == -1) |
| 2331 | return ret; |
| 2332 | |
| 2333 | if ((ret = vionet_dump(fd)) == -1) |
| 2334 | return ret; |
| 2335 | |
| 2336 | if ((ret = vmmci_dump(fd)) == -1) |
| 2337 | return ret; |
| 2338 | |
| 2339 | return (0); |
| 2340 | } |
| 2341 | |
| 2342 | void |
| 2343 | virtio_stop(struct vm_create_params *vcp) |
| 2344 | { |
| 2345 | uint8_t i; |
| 2346 | for (i = 0; i < vcp->vcp_nnics; i++) { |
| 2347 | if (event_del(&vionet[i].event)) { |
| 2348 | log_warn("could not initialize vionet event " |
| 2349 | "handler"); |
| 2350 | return; |
| 2351 | } |
| 2352 | } |
| 2353 | } |
| 2354 | |
| 2355 | void |
| 2356 | virtio_start(struct vm_create_params *vcp) |
| 2357 | { |
| 2358 | uint8_t i; |
| 2359 | for (i = 0; i < vcp->vcp_nnics; i++) { |
| 2360 | if (event_add(&vionet[i].event, NULL((void*)0))) { |
| 2361 | log_warn("could not initialize vionet event " |
| 2362 | "handler"); |
| 2363 | return; |
| 2364 | } |
| 2365 | } |
| 2366 | } |