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