usr.sbin/bhyve/pci_fbuf.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   3  *
   4  * Copyright (c) 2015 Nahanni Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 #include <sys/types.h>
  31 #include <sys/mman.h>
  32
  33 #include <machine/vmm.h>
  34 #include <machine/vmm_snapshot.h>
  35 #include <vmmapi.h>
  36
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40
  41 #include <errno.h>
  42 #include <unistd.h>
  43
  44 #include "bhyvegc.h"
  45 #include "bhyverun.h"
  46 #include "config.h"
  47 #include "debug.h"
  48 #include "console.h"
  49 #include "inout.h"
  50 #include "pci_emul.h"
  51 #include "rfb.h"
  52 #include "vga.h"
  53
  54 /*
  55  * bhyve Framebuffer device emulation.
  56  * BAR0 points to the current mode information.
  57  * BAR1 is the 32-bit framebuffer address.
  58  *
  59  *  -s <b>,fbuf,wait,vga=on|io|off,rfb=<ip>:port,w=width,h=height
  60  */
  61
  62 static int fbuf_debug = 1;
  63 #define DEBUG_INFO      1
  64 #define DEBUG_VERBOSE   4
  65 #define DPRINTF(level, params)  if (level <= fbuf_debug) PRINTLN params
  66
  67
  68 #define KB      (1024UL)
  69 #define MB      (1024 * 1024UL)
  70
  71 #define DMEMSZ  128
  72
  73 #define FB_SIZE         (16*MB)
  74
  75 #define COLS_MAX        1920
  76 #define ROWS_MAX        1200
  77
  78 #define COLS_DEFAULT    1024
  79 #define ROWS_DEFAULT    768
  80
  81 #define COLS_MIN        640
  82 #define ROWS_MIN        480
  83
  84 struct pci_fbuf_softc {
  85         struct pci_devinst *fsc_pi;
  86         struct {
  87                 uint32_t fbsize;
  88                 uint16_t width;
  89                 uint16_t height;
  90                 uint16_t depth;
  91                 uint16_t refreshrate;
  92                 uint8_t  reserved[116];
  93         } __packed memregs;
  94
  95         /* rfb server */
  96         char      *rfb_host;
  97         char      *rfb_password;
  98         int       rfb_port;
  99         int       rfb_wait;
 100         int       vga_enabled;
 101         int       vga_full;
 102
 103         uint32_t  fbaddr;
 104         char      *fb_base;
 105         uint16_t  gc_width;
 106         uint16_t  gc_height;
 107         void      *vgasc;
 108         struct bhyvegc_image *gc_image;
 109 };
 110
 111 static struct pci_fbuf_softc *fbuf_sc;
 112
 113 #define PCI_FBUF_MSI_MSGS        4
 114
 115 static void
 116 pci_fbuf_write(struct pci_devinst *pi, int baridx, uint64_t offset, int size,
 117     uint64_t value)
 118 {
 119         struct pci_fbuf_softc *sc;
 120         uint8_t *p;
 121
 122         assert(baridx == 0);
 123
 124         sc = pi->pi_arg;
 125
 126         DPRINTF(DEBUG_VERBOSE,
 127             ("fbuf wr: offset 0x%lx, size: %d, value: 0x%lx",
 128             offset, size, value));
 129
 130         if (offset + size > DMEMSZ) {
 131                 printf("fbuf: write too large, offset %ld size %d\n",
 132                        offset, size);
 133                 return;
 134         }
 135
 136         p = (uint8_t *)&sc->memregs + offset;
 137
 138         switch (size) {
 139         case 1:
 140                 *p = value;
 141                 break;
 142         case 2:
 143                 *(uint16_t *)p = value;
 144                 break;
 145         case 4:
 146                 *(uint32_t *)p = value;
 147                 break;
 148         case 8:
 149                 *(uint64_t *)p = value;
 150                 break;
 151         default:
 152                 printf("fbuf: write unknown size %d\n", size);
 153                 break;
 154         }
 155
 156         if (!sc->gc_image->vgamode && sc->memregs.width == 0 &&
 157             sc->memregs.height == 0) {
 158                 DPRINTF(DEBUG_INFO, ("switching to VGA mode"));
 159                 sc->gc_image->vgamode = 1;
 160                 sc->gc_width = 0;
 161                 sc->gc_height = 0;
 162         } else if (sc->gc_image->vgamode && sc->memregs.width != 0 &&
 163             sc->memregs.height != 0) {
 164                 DPRINTF(DEBUG_INFO, ("switching to VESA mode"));
 165                 sc->gc_image->vgamode = 0;
 166         }
 167 }
 168
 169 static uint64_t
 170 pci_fbuf_read(struct pci_devinst *pi, int baridx, uint64_t offset, int size)
 171 {
 172         struct pci_fbuf_softc *sc;
 173         uint8_t *p;
 174         uint64_t value;
 175
 176         assert(baridx == 0);
 177
 178         sc = pi->pi_arg;
 179
 180
 181         if (offset + size > DMEMSZ) {
 182                 printf("fbuf: read too large, offset %ld size %d\n",
 183                        offset, size);
 184                 return (0);
 185         }
 186
 187         p = (uint8_t *)&sc->memregs + offset;
 188         value = 0;
 189         switch (size) {
 190         case 1:
 191                 value = *p;
 192                 break;
 193         case 2:
 194                 value = *(uint16_t *)p;
 195                 break;
 196         case 4:
 197                 value = *(uint32_t *)p;
 198                 break;
 199         case 8:
 200                 value = *(uint64_t *)p;
 201                 break;
 202         default:
 203                 printf("fbuf: read unknown size %d\n", size);
 204                 break;
 205         }
 206
 207         DPRINTF(DEBUG_VERBOSE,
 208             ("fbuf rd: offset 0x%lx, size: %d, value: 0x%lx",
 209              offset, size, value));
 210
 211         return (value);
 212 }
 213
 214 static void
 215 pci_fbuf_baraddr(struct pci_devinst *pi, int baridx, int enabled,
 216     uint64_t address)
 217 {
 218         struct pci_fbuf_softc *sc;
 219         int prot;
 220
 221         if (baridx != 1)
 222                 return;
 223
 224         sc = pi->pi_arg;
 225         if (!enabled) {
 226                 if (vm_munmap_memseg(pi->pi_vmctx, sc->fbaddr, FB_SIZE) != 0)
 227                         EPRINTLN("pci_fbuf: munmap_memseg failed");
 228                 sc->fbaddr = 0;
 229         } else {
 230                 prot = PROT_READ | PROT_WRITE;
 231                 if (vm_mmap_memseg(pi->pi_vmctx, address, VM_FRAMEBUFFER, 0,
 232                     FB_SIZE, prot) != 0)
 233                         EPRINTLN("pci_fbuf: mmap_memseg failed");
 234                 sc->fbaddr = address;
 235         }
 236 }
 237
 238
 239 static int
 240 pci_fbuf_parse_config(struct pci_fbuf_softc *sc, nvlist_t *nvl)
 241 {
 242         const char *value;
 243         char *cp;
 244
 245         sc->rfb_wait = get_config_bool_node_default(nvl, "wait", false);
 246
 247         /* Prefer "rfb" to "tcp". */
 248         value = get_config_value_node(nvl, "rfb");
 249         if (value == NULL)
 250                 value = get_config_value_node(nvl, "tcp");
 251         if (value != NULL) {
 252                 /*
 253                  * IPv4 -- host-ip:port
 254                  * IPv6 -- [host-ip%zone]:port
 255                  * XXX for now port is mandatory for IPv4.
 256                  */
 257                 if (value[0] == '[') {
 258                         cp = strchr(value + 1, ']');
 259                         if (cp == NULL || cp == value + 1) {
 260                                 EPRINTLN("fbuf: Invalid IPv6 address: \"%s\"",
 261                                     value);
 262                                 return (-1);
 263                         }
 264                         sc->rfb_host = strndup(value + 1, cp - (value + 1));
 265                         cp++;
 266                         if (*cp == ':') {
 267                                 cp++;
 268                                 if (*cp == '\0') {
 269                                         EPRINTLN(
 270                                             "fbuf: Missing port number: \"%s\"",
 271                                             value);
 272                                         return (-1);
 273                                 }
 274                                 sc->rfb_port = atoi(cp);
 275                         } else if (*cp != '\0') {
 276                                 EPRINTLN("fbuf: Invalid IPv6 address: \"%s\"",
 277                                     value);
 278                                 return (-1);
 279                         }
 280                 } else {
 281                         cp = strchr(value, ':');
 282                         if (cp == NULL) {
 283                                 sc->rfb_port = atoi(value);
 284                         } else {
 285                                 sc->rfb_host = strndup(value, cp - value);
 286                                 cp++;
 287                                 if (*cp == '\0') {
 288                                         EPRINTLN(
 289                                             "fbuf: Missing port number: \"%s\"",
 290                                             value);
 291                                         return (-1);
 292                                 }
 293                                 sc->rfb_port = atoi(cp);
 294                         }
 295                 }
 296         }
 297
 298         value = get_config_value_node(nvl, "vga");
 299         if (value != NULL) {
 300                 if (strcmp(value, "off") == 0) {
 301                         sc->vga_enabled = 0;
 302                 } else if (strcmp(value, "io") == 0) {
 303                         sc->vga_enabled = 1;
 304                         sc->vga_full = 0;
 305                 } else if (strcmp(value, "on") == 0) {
 306                         sc->vga_enabled = 1;
 307                         sc->vga_full = 1;
 308                 } else {
 309                         EPRINTLN("fbuf: Invalid vga setting: \"%s\"", value);
 310                         return (-1);
 311                 }
 312         }
 313
 314         value = get_config_value_node(nvl, "w");
 315         if (value != NULL) {
 316                 sc->memregs.width = atoi(value);
 317                 if (sc->memregs.width > COLS_MAX) {
 318                         EPRINTLN("fbuf: width %d too large", sc->memregs.width);
 319                         return (-1);
 320                 }
 321                 if (sc->memregs.width == 0)
 322                         sc->memregs.width = 1920;
 323         }
 324
 325         value = get_config_value_node(nvl, "h");
 326         if (value != NULL) {
 327                 sc->memregs.height = atoi(value);
 328                 if (sc->memregs.height > ROWS_MAX) {
 329                         EPRINTLN("fbuf: height %d too large",
 330                             sc->memregs.height);
 331                         return (-1);
 332                 }
 333                 if (sc->memregs.height == 0)
 334                         sc->memregs.height = 1080;
 335         }
 336
 337         value = get_config_value_node(nvl, "password");
 338         if (value != NULL)
 339                 sc->rfb_password = strdup(value);
 340
 341         return (0);
 342 }
 343
 344 static void
 345 pci_fbuf_render(struct bhyvegc *gc, void *arg)
 346 {
 347         struct pci_fbuf_softc *sc;
 348
 349         sc = arg;
 350
 351         if (sc->vga_full && sc->gc_image->vgamode) {
 352                 /* TODO: mode switching to vga and vesa should use the special
 353                  *      EFI-bhyve protocol port.
 354                  */
 355                 vga_render(gc, sc->vgasc);
 356                 return;
 357         }
 358         if (sc->gc_width != sc->memregs.width ||
 359             sc->gc_height != sc->memregs.height) {
 360                 bhyvegc_resize(gc, sc->memregs.width, sc->memregs.height);
 361                 sc->gc_width = sc->memregs.width;
 362                 sc->gc_height = sc->memregs.height;
 363         }
 364 }
 365
 366 static int
 367 pci_fbuf_init(struct pci_devinst *pi, nvlist_t *nvl)
 368 {
 369         int error;
 370         struct pci_fbuf_softc *sc;
 371
 372         if (fbuf_sc != NULL) {
 373                 EPRINTLN("Only one frame buffer device is allowed.");
 374                 return (-1);
 375         }
 376
 377         sc = calloc(1, sizeof(struct pci_fbuf_softc));
 378
 379         pi->pi_arg = sc;
 380
 381         /* initialize config space */
 382         pci_set_cfgdata16(pi, PCIR_DEVICE, 0x40FB);
 383         pci_set_cfgdata16(pi, PCIR_VENDOR, 0xFB5D);
 384         pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_DISPLAY);
 385         pci_set_cfgdata8(pi, PCIR_SUBCLASS, PCIS_DISPLAY_VGA);
 386
 387         sc->fb_base = vm_create_devmem(pi->pi_vmctx, VM_FRAMEBUFFER,
 388             "framebuffer", FB_SIZE);
 389         if (sc->fb_base == MAP_FAILED) {
 390                 error = -1;
 391                 goto done;
 392         }
 393
 394         error = pci_emul_alloc_bar(pi, 0, PCIBAR_MEM32, DMEMSZ);
 395         assert(error == 0);
 396
 397         error = pci_emul_alloc_bar(pi, 1, PCIBAR_MEM32, FB_SIZE);
 398         assert(error == 0);
 399
 400         error = pci_emul_add_msicap(pi, PCI_FBUF_MSI_MSGS);
 401         assert(error == 0);
 402
 403         sc->memregs.fbsize = FB_SIZE;
 404         sc->memregs.width  = COLS_DEFAULT;
 405         sc->memregs.height = ROWS_DEFAULT;
 406         sc->memregs.depth  = 32;
 407
 408         sc->vga_enabled = 1;
 409         sc->vga_full = 0;
 410
 411         sc->fsc_pi = pi;
 412
 413         error = pci_fbuf_parse_config(sc, nvl);
 414         if (error != 0)
 415                 goto done;
 416
 417         /* XXX until VGA rendering is enabled */
 418         if (sc->vga_full != 0) {
 419                 EPRINTLN("pci_fbuf: VGA rendering not enabled");
 420                 goto done;
 421         }
 422
 423         DPRINTF(DEBUG_INFO, ("fbuf frame buffer base: %p [sz %lu]",
 424                 sc->fb_base, FB_SIZE));
 425
 426         console_init(sc->memregs.width, sc->memregs.height, sc->fb_base);
 427         console_fb_register(pci_fbuf_render, sc);
 428
 429         if (sc->vga_enabled)
 430                 sc->vgasc = vga_init(!sc->vga_full);
 431         sc->gc_image = console_get_image();
 432
 433         fbuf_sc = sc;
 434
 435         memset((void *)sc->fb_base, 0, FB_SIZE);
 436
 437         error = rfb_init(sc->rfb_host, sc->rfb_port, sc->rfb_wait, sc->rfb_password);
 438 done:
 439         if (error)
 440                 free(sc);
 441
 442         return (error);
 443 }
 444
 445 #ifdef BHYVE_SNAPSHOT
 446 static int
 447 pci_fbuf_snapshot(struct vm_snapshot_meta *meta)
 448 {
 449         int ret;
 450
 451         SNAPSHOT_BUF_OR_LEAVE(fbuf_sc->fb_base, FB_SIZE, meta, ret, err);
 452
 453 err:
 454         return (ret);
 455 }
 456 #endif
 457
 458 static const struct pci_devemu pci_fbuf = {
 459         .pe_emu =       "fbuf",
 460         .pe_init =      pci_fbuf_init,
 461         .pe_barwrite =  pci_fbuf_write,
 462         .pe_barread =   pci_fbuf_read,
 463         .pe_baraddr =   pci_fbuf_baraddr,
 464 #ifdef BHYVE_SNAPSHOT
 465         .pe_snapshot =  pci_fbuf_snapshot,
 466 #endif
 467 };
 468 PCI_EMUL_SET(pci_fbuf);