usr.sbin/bhyve/pci_fbuf.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   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  * $FreeBSD$
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/types.h>
  35 #include <sys/mman.h>
  36
  37 #include <machine/vmm.h>
  38 #include <machine/vmm_snapshot.h>
  39 #include <vmmapi.h>
  40
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44
  45 #include <errno.h>
  46 #include <unistd.h>
  47
  48 #include "bhyvegc.h"
  49 #include "bhyverun.h"
  50 #include "config.h"
  51 #include "debug.h"
  52 #include "console.h"
  53 #include "inout.h"
  54 #include "pci_emul.h"
  55 #include "rfb.h"
  56 #include "vga.h"
  57
  58 /*
  59  * bhyve Framebuffer device emulation.
  60  * BAR0 points to the current mode information.
  61  * BAR1 is the 32-bit framebuffer address.
  62  *
  63  *  -s <b>,fbuf,wait,vga=on|io|off,rfb=<ip>:port,w=width,h=height
  64  */
  65
  66 static int fbuf_debug = 1;
  67 #define DEBUG_INFO      1
  68 #define DEBUG_VERBOSE   4
  69 #define DPRINTF(level, params)  if (level <= fbuf_debug) PRINTLN params
  70
  71
  72 #define KB      (1024UL)
  73 #define MB      (1024 * 1024UL)
  74
  75 #define DMEMSZ  128
  76
  77 #define FB_SIZE         (16*MB)
  78
  79 #define COLS_MAX        1920
  80 #define ROWS_MAX        1200
  81
  82 #define COLS_DEFAULT    1024
  83 #define ROWS_DEFAULT    768
  84
  85 #define COLS_MIN        640
  86 #define ROWS_MIN        480
  87
  88 struct pci_fbuf_softc {
  89         struct pci_devinst *fsc_pi;
  90         struct {
  91                 uint32_t fbsize;
  92                 uint16_t width;
  93                 uint16_t height;
  94                 uint16_t depth;
  95                 uint16_t refreshrate;
  96                 uint8_t  reserved[116];
  97         } __packed memregs;
  98
  99         /* rfb server */
 100         char      *rfb_host;
 101         char      *rfb_password;
 102         int       rfb_port;
 103         int       rfb_wait;
 104         int       vga_enabled;
 105         int       vga_full;
 106
 107         uint32_t  fbaddr;
 108         char      *fb_base;
 109         uint16_t  gc_width;
 110         uint16_t  gc_height;
 111         void      *vgasc;
 112         struct bhyvegc_image *gc_image;
 113 };
 114
 115 static struct pci_fbuf_softc *fbuf_sc;
 116
 117 #define PCI_FBUF_MSI_MSGS        4
 118
 119 static void
 120 pci_fbuf_write(struct pci_devinst *pi, int baridx, uint64_t offset, int size,
 121     uint64_t value)
 122 {
 123         struct pci_fbuf_softc *sc;
 124         uint8_t *p;
 125
 126         assert(baridx == 0);
 127
 128         sc = pi->pi_arg;
 129
 130         DPRINTF(DEBUG_VERBOSE,
 131             ("fbuf wr: offset 0x%lx, size: %d, value: 0x%lx",
 132             offset, size, value));
 133
 134         if (offset + size > DMEMSZ) {
 135                 printf("fbuf: write too large, offset %ld size %d\n",
 136                        offset, size);
 137                 return;
 138         }
 139
 140         p = (uint8_t *)&sc->memregs + offset;
 141
 142         switch (size) {
 143         case 1:
 144                 *p = value;
 145                 break;
 146         case 2:
 147                 *(uint16_t *)p = value;
 148                 break;
 149         case 4:
 150                 *(uint32_t *)p = value;
 151                 break;
 152         case 8:
 153                 *(uint64_t *)p = value;
 154                 break;
 155         default:
 156                 printf("fbuf: write unknown size %d\n", size);
 157                 break;
 158         }
 159
 160         if (!sc->gc_image->vgamode && sc->memregs.width == 0 &&
 161             sc->memregs.height == 0) {
 162                 DPRINTF(DEBUG_INFO, ("switching to VGA mode"));
 163                 sc->gc_image->vgamode = 1;
 164                 sc->gc_width = 0;
 165                 sc->gc_height = 0;
 166         } else if (sc->gc_image->vgamode && sc->memregs.width != 0 &&
 167             sc->memregs.height != 0) {
 168                 DPRINTF(DEBUG_INFO, ("switching to VESA mode"));
 169                 sc->gc_image->vgamode = 0;
 170         }
 171 }
 172
 173 static uint64_t
 174 pci_fbuf_read(struct pci_devinst *pi, int baridx, uint64_t offset, int size)
 175 {
 176         struct pci_fbuf_softc *sc;
 177         uint8_t *p;
 178         uint64_t value;
 179
 180         assert(baridx == 0);
 181
 182         sc = pi->pi_arg;
 183
 184
 185         if (offset + size > DMEMSZ) {
 186                 printf("fbuf: read too large, offset %ld size %d\n",
 187                        offset, size);
 188                 return (0);
 189         }
 190
 191         p = (uint8_t *)&sc->memregs + offset;
 192         value = 0;
 193         switch (size) {
 194         case 1:
 195                 value = *p;
 196                 break;
 197         case 2:
 198                 value = *(uint16_t *)p;
 199                 break;
 200         case 4:
 201                 value = *(uint32_t *)p;
 202                 break;
 203         case 8:
 204                 value = *(uint64_t *)p;
 205                 break;
 206         default:
 207                 printf("fbuf: read unknown size %d\n", size);
 208                 break;
 209         }
 210
 211         DPRINTF(DEBUG_VERBOSE,
 212             ("fbuf rd: offset 0x%lx, size: %d, value: 0x%lx",
 213              offset, size, value));
 214
 215         return (value);
 216 }
 217
 218 static void
 219 pci_fbuf_baraddr(struct pci_devinst *pi, int baridx, int enabled,
 220     uint64_t address)
 221 {
 222         struct pci_fbuf_softc *sc;
 223         int prot;
 224
 225         if (baridx != 1)
 226                 return;
 227
 228         sc = pi->pi_arg;
 229         if (!enabled) {
 230                 if (vm_munmap_memseg(pi->pi_vmctx, sc->fbaddr, FB_SIZE) != 0)
 231                         EPRINTLN("pci_fbuf: munmap_memseg failed");
 232                 sc->fbaddr = 0;
 233         } else {
 234                 prot = PROT_READ | PROT_WRITE;
 235                 if (vm_mmap_memseg(pi->pi_vmctx, address, VM_FRAMEBUFFER, 0,
 236                     FB_SIZE, prot) != 0)
 237                         EPRINTLN("pci_fbuf: mmap_memseg failed");
 238                 sc->fbaddr = address;
 239         }
 240 }
 241
 242
 243 static int
 244 pci_fbuf_parse_config(struct pci_fbuf_softc *sc, nvlist_t *nvl)
 245 {
 246         const char *value;
 247         char *cp;
 248
 249         sc->rfb_wait = get_config_bool_node_default(nvl, "wait", false);
 250
 251         /* Prefer "rfb" to "tcp". */
 252         value = get_config_value_node(nvl, "rfb");
 253         if (value == NULL)
 254                 value = get_config_value_node(nvl, "tcp");
 255         if (value != NULL) {
 256                 /*
 257                  * IPv4 -- host-ip:port
 258                  * IPv6 -- [host-ip%zone]:port
 259                  * XXX for now port is mandatory for IPv4.
 260                  */
 261                 if (value[0] == '[') {
 262                         cp = strchr(value + 1, ']');
 263                         if (cp == NULL || cp == value + 1) {
 264                                 EPRINTLN("fbuf: Invalid IPv6 address: \"%s\"",
 265                                     value);
 266                                 return (-1);
 267                         }
 268                         sc->rfb_host = strndup(value + 1, cp - (value + 1));
 269                         cp++;
 270                         if (*cp == ':') {
 271                                 cp++;
 272                                 if (*cp == '\0') {
 273                                         EPRINTLN(
 274                                             "fbuf: Missing port number: \"%s\"",
 275                                             value);
 276                                         return (-1);
 277                                 }
 278                                 sc->rfb_port = atoi(cp);
 279                         } else if (*cp != '\0') {
 280                                 EPRINTLN("fbuf: Invalid IPv6 address: \"%s\"",
 281                                     value);
 282                                 return (-1);
 283                         }
 284                 } else {
 285                         cp = strchr(value, ':');
 286                         if (cp == NULL) {
 287                                 sc->rfb_port = atoi(value);
 288                         } else {
 289                                 sc->rfb_host = strndup(value, cp - value);
 290                                 cp++;
 291                                 if (*cp == '\0') {
 292                                         EPRINTLN(
 293                                             "fbuf: Missing port number: \"%s\"",
 294                                             value);
 295                                         return (-1);
 296                                 }
 297                                 sc->rfb_port = atoi(cp);
 298                         }
 299                 }
 300         }
 301
 302         value = get_config_value_node(nvl, "vga");
 303         if (value != NULL) {
 304                 if (strcmp(value, "off") == 0) {
 305                         sc->vga_enabled = 0;
 306                 } else if (strcmp(value, "io") == 0) {
 307                         sc->vga_enabled = 1;
 308                         sc->vga_full = 0;
 309                 } else if (strcmp(value, "on") == 0) {
 310                         sc->vga_enabled = 1;
 311                         sc->vga_full = 1;
 312                 } else {
 313                         EPRINTLN("fbuf: Invalid vga setting: \"%s\"", value);
 314                         return (-1);
 315                 }
 316         }
 317
 318         value = get_config_value_node(nvl, "w");
 319         if (value != NULL) {
 320                 sc->memregs.width = atoi(value);
 321                 if (sc->memregs.width > COLS_MAX) {
 322                         EPRINTLN("fbuf: width %d too large", sc->memregs.width);
 323                         return (-1);
 324                 }
 325                 if (sc->memregs.width == 0)
 326                         sc->memregs.width = 1920;
 327         }
 328
 329         value = get_config_value_node(nvl, "h");
 330         if (value != NULL) {
 331                 sc->memregs.height = atoi(value);
 332                 if (sc->memregs.height > ROWS_MAX) {
 333                         EPRINTLN("fbuf: height %d too large",
 334                             sc->memregs.height);
 335                         return (-1);
 336                 }
 337                 if (sc->memregs.height == 0)
 338                         sc->memregs.height = 1080;
 339         }
 340
 341         value = get_config_value_node(nvl, "password");
 342         if (value != NULL)
 343                 sc->rfb_password = strdup(value);
 344
 345         return (0);
 346 }
 347
 348 static void
 349 pci_fbuf_render(struct bhyvegc *gc, void *arg)
 350 {
 351         struct pci_fbuf_softc *sc;
 352
 353         sc = arg;
 354
 355         if (sc->vga_full && sc->gc_image->vgamode) {
 356                 /* TODO: mode switching to vga and vesa should use the special
 357                  *      EFI-bhyve protocol port.
 358                  */
 359                 vga_render(gc, sc->vgasc);
 360                 return;
 361         }
 362         if (sc->gc_width != sc->memregs.width ||
 363             sc->gc_height != sc->memregs.height) {
 364                 bhyvegc_resize(gc, sc->memregs.width, sc->memregs.height);
 365                 sc->gc_width = sc->memregs.width;
 366                 sc->gc_height = sc->memregs.height;
 367         }
 368
 369         return;
 370 }
 371
 372 static int
 373 pci_fbuf_init(struct pci_devinst *pi, nvlist_t *nvl)
 374 {
 375         int error;
 376         struct pci_fbuf_softc *sc;
 377
 378         if (fbuf_sc != NULL) {
 379                 EPRINTLN("Only one frame buffer device is allowed.");
 380                 return (-1);
 381         }
 382
 383         sc = calloc(1, sizeof(struct pci_fbuf_softc));
 384
 385         pi->pi_arg = sc;
 386
 387         /* initialize config space */
 388         pci_set_cfgdata16(pi, PCIR_DEVICE, 0x40FB);
 389         pci_set_cfgdata16(pi, PCIR_VENDOR, 0xFB5D);
 390         pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_DISPLAY);
 391         pci_set_cfgdata8(pi, PCIR_SUBCLASS, PCIS_DISPLAY_VGA);
 392
 393         sc->fb_base = vm_create_devmem(pi->pi_vmctx, VM_FRAMEBUFFER,
 394             "framebuffer", FB_SIZE);
 395         if (sc->fb_base == MAP_FAILED) {
 396                 error = -1;
 397                 goto done;
 398         }
 399
 400         error = pci_emul_alloc_bar(pi, 0, PCIBAR_MEM32, DMEMSZ);
 401         assert(error == 0);
 402
 403         error = pci_emul_alloc_bar(pi, 1, PCIBAR_MEM32, FB_SIZE);
 404         assert(error == 0);
 405
 406         error = pci_emul_add_msicap(pi, PCI_FBUF_MSI_MSGS);
 407         assert(error == 0);
 408
 409         sc->memregs.fbsize = FB_SIZE;
 410         sc->memregs.width  = COLS_DEFAULT;
 411         sc->memregs.height = ROWS_DEFAULT;
 412         sc->memregs.depth  = 32;
 413
 414         sc->vga_enabled = 1;
 415         sc->vga_full = 0;
 416
 417         sc->fsc_pi = pi;
 418
 419         error = pci_fbuf_parse_config(sc, nvl);
 420         if (error != 0)
 421                 goto done;
 422
 423         /* XXX until VGA rendering is enabled */
 424         if (sc->vga_full != 0) {
 425                 EPRINTLN("pci_fbuf: VGA rendering not enabled");
 426                 goto done;
 427         }
 428
 429         DPRINTF(DEBUG_INFO, ("fbuf frame buffer base: %p [sz %lu]",
 430                 sc->fb_base, FB_SIZE));
 431
 432         console_init(sc->memregs.width, sc->memregs.height, sc->fb_base);
 433         console_fb_register(pci_fbuf_render, sc);
 434
 435         if (sc->vga_enabled)
 436                 sc->vgasc = vga_init(!sc->vga_full);
 437         sc->gc_image = console_get_image();
 438
 439         fbuf_sc = sc;
 440
 441         memset((void *)sc->fb_base, 0, FB_SIZE);
 442
 443         error = rfb_init(sc->rfb_host, sc->rfb_port, sc->rfb_wait, sc->rfb_password);
 444 done:
 445         if (error)
 446                 free(sc);
 447
 448         return (error);
 449 }
 450
 451 #ifdef BHYVE_SNAPSHOT
 452 static int
 453 pci_fbuf_snapshot(struct vm_snapshot_meta *meta)
 454 {
 455         int ret;
 456
 457         SNAPSHOT_BUF_OR_LEAVE(fbuf_sc->fb_base, FB_SIZE, meta, ret, err);
 458
 459 err:
 460         return (ret);
 461 }
 462 #endif
 463
 464 static const struct pci_devemu pci_fbuf = {
 465         .pe_emu =       "fbuf",
 466         .pe_init =      pci_fbuf_init,
 467         .pe_barwrite =  pci_fbuf_write,
 468         .pe_barread =   pci_fbuf_read,
 469         .pe_baraddr =   pci_fbuf_baraddr,
 470 #ifdef BHYVE_SNAPSHOT
 471         .pe_snapshot =  pci_fbuf_snapshot,
 472 #endif
 473 };
 474 PCI_EMUL_SET(pci_fbuf);