1 /*- 2 * Copyright (c) 2013 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Benno Rice under sponsorship from 6 * the FreeBSD Foundation. 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 AND CONTRIBUTORS ``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 __FBSDID("$FreeBSD$"); 31 32 #include <bootstrap.h> 33 #include <sys/endian.h> 34 #include <stand.h> 35 36 #include <efi.h> 37 #include <efilib.h> 38 #include <efiuga.h> 39 #include <efipciio.h> 40 #include <machine/metadata.h> 41 42 #include "framebuffer.h" 43 44 static EFI_GUID gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID; 45 static EFI_GUID pciio_guid = EFI_PCI_IO_PROTOCOL_GUID; 46 static EFI_GUID uga_guid = EFI_UGA_DRAW_PROTOCOL_GUID; 47 48 static u_int 49 efifb_color_depth(struct efi_fb *efifb) 50 { 51 uint32_t mask; 52 u_int depth; 53 54 mask = efifb->fb_mask_red | efifb->fb_mask_green | 55 efifb->fb_mask_blue | efifb->fb_mask_reserved; 56 if (mask == 0) 57 return (0); 58 for (depth = 1; mask != 1; depth++) 59 mask >>= 1; 60 return (depth); 61 } 62 63 static int 64 efifb_mask_from_pixfmt(struct efi_fb *efifb, EFI_GRAPHICS_PIXEL_FORMAT pixfmt, 65 EFI_PIXEL_BITMASK *pixinfo) 66 { 67 int result; 68 69 result = 0; 70 switch (pixfmt) { 71 case PixelRedGreenBlueReserved8BitPerColor: 72 efifb->fb_mask_red = 0x000000ff; 73 efifb->fb_mask_green = 0x0000ff00; 74 efifb->fb_mask_blue = 0x00ff0000; 75 efifb->fb_mask_reserved = 0xff000000; 76 break; 77 case PixelBlueGreenRedReserved8BitPerColor: 78 efifb->fb_mask_red = 0x00ff0000; 79 efifb->fb_mask_green = 0x0000ff00; 80 efifb->fb_mask_blue = 0x000000ff; 81 efifb->fb_mask_reserved = 0xff000000; 82 break; 83 case PixelBitMask: 84 efifb->fb_mask_red = pixinfo->RedMask; 85 efifb->fb_mask_green = pixinfo->GreenMask; 86 efifb->fb_mask_blue = pixinfo->BlueMask; 87 efifb->fb_mask_reserved = pixinfo->ReservedMask; 88 break; 89 default: 90 result = 1; 91 break; 92 } 93 return (result); 94 } 95 96 static int 97 efifb_from_gop(struct efi_fb *efifb, EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *mode, 98 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info) 99 { 100 int result; 101 102 efifb->fb_addr = mode->FrameBufferBase; 103 efifb->fb_size = mode->FrameBufferSize; 104 efifb->fb_height = info->VerticalResolution; 105 efifb->fb_width = info->HorizontalResolution; 106 efifb->fb_stride = info->PixelsPerScanLine; 107 result = efifb_mask_from_pixfmt(efifb, info->PixelFormat, 108 &info->PixelInformation); 109 return (result); 110 } 111 112 static ssize_t 113 efifb_uga_find_pixel(EFI_UGA_DRAW_PROTOCOL *uga, u_int line, 114 EFI_PCI_IO_PROTOCOL *pciio, uint64_t addr, uint64_t size) 115 { 116 EFI_UGA_PIXEL pix0, pix1; 117 uint8_t *data1, *data2; 118 size_t count, maxcount = 1024; 119 ssize_t ofs; 120 EFI_STATUS status; 121 u_int idx; 122 123 status = uga->Blt(uga, &pix0, EfiUgaVideoToBltBuffer, 124 0, line, 0, 0, 1, 1, 0); 125 if (EFI_ERROR(status)) { 126 printf("UGA BLT operation failed (video->buffer)"); 127 return (-1); 128 } 129 pix1.Red = ~pix0.Red; 130 pix1.Green = ~pix0.Green; 131 pix1.Blue = ~pix0.Blue; 132 pix1.Reserved = 0; 133 134 data1 = calloc(maxcount, 2); 135 if (data1 == NULL) { 136 printf("Unable to allocate memory"); 137 return (-1); 138 } 139 data2 = data1 + maxcount; 140 141 ofs = 0; 142 while (size > 0) { 143 count = min(size, maxcount); 144 145 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32, 146 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2, 147 data1); 148 if (EFI_ERROR(status)) { 149 printf("Error reading frame buffer (before)"); 150 goto fail; 151 } 152 status = uga->Blt(uga, &pix1, EfiUgaBltBufferToVideo, 153 0, 0, 0, line, 1, 1, 0); 154 if (EFI_ERROR(status)) { 155 printf("UGA BLT operation failed (modify)"); 156 goto fail; 157 } 158 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32, 159 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2, 160 data2); 161 if (EFI_ERROR(status)) { 162 printf("Error reading frame buffer (after)"); 163 goto fail; 164 } 165 status = uga->Blt(uga, &pix0, EfiUgaBltBufferToVideo, 166 0, 0, 0, line, 1, 1, 0); 167 if (EFI_ERROR(status)) { 168 printf("UGA BLT operation failed (restore)"); 169 goto fail; 170 } 171 for (idx = 0; idx < count; idx++) { 172 if (data1[idx] != data2[idx]) { 173 free(data1); 174 return (ofs + (idx & ~3)); 175 } 176 } 177 ofs += count; 178 size -= count; 179 } 180 printf("No change detected in frame buffer"); 181 182 fail: 183 printf(" -- error %lu\n", EFI_ERROR_CODE(status)); 184 free(data1); 185 return (-1); 186 } 187 188 static EFI_PCI_IO_PROTOCOL * 189 efifb_uga_get_pciio(void) 190 { 191 EFI_PCI_IO_PROTOCOL *pciio; 192 EFI_HANDLE *buf, *hp; 193 EFI_STATUS status; 194 UINTN bufsz; 195 196 /* Get all handles that support the UGA protocol. */ 197 bufsz = 0; 198 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, NULL); 199 if (status != EFI_BUFFER_TOO_SMALL) 200 return (NULL); 201 buf = malloc(bufsz); 202 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, buf); 203 if (status != EFI_SUCCESS) { 204 free(buf); 205 return (NULL); 206 } 207 bufsz /= sizeof(EFI_HANDLE); 208 209 /* Get the PCI I/O interface of the first handle that supports it. */ 210 pciio = NULL; 211 for (hp = buf; hp < buf + bufsz; hp++) { 212 status = BS->HandleProtocol(*hp, &pciio_guid, (void **)&pciio); 213 if (status == EFI_SUCCESS) { 214 free(buf); 215 return (pciio); 216 } 217 } 218 free(buf); 219 return (NULL); 220 } 221 222 static EFI_STATUS 223 efifb_uga_locate_framebuffer(EFI_PCI_IO_PROTOCOL *pciio, uint64_t *addrp, 224 uint64_t *sizep) 225 { 226 uint8_t *resattr; 227 uint64_t addr, size; 228 EFI_STATUS status; 229 u_int bar; 230 231 if (pciio == NULL) 232 return (EFI_DEVICE_ERROR); 233 234 /* Attempt to get the frame buffer address (imprecise). */ 235 *addrp = 0; 236 *sizep = 0; 237 for (bar = 0; bar < 6; bar++) { 238 status = pciio->GetBarAttributes(pciio, bar, NULL, 239 (void **)&resattr); 240 if (status != EFI_SUCCESS) 241 continue; 242 /* XXX magic offsets and constants. */ 243 if (resattr[0] == 0x87 && resattr[3] == 0) { 244 /* 32-bit address space descriptor (MEMIO) */ 245 addr = le32dec(resattr + 10); 246 size = le32dec(resattr + 22); 247 } else if (resattr[0] == 0x8a && resattr[3] == 0) { 248 /* 64-bit address space descriptor (MEMIO) */ 249 addr = le64dec(resattr + 14); 250 size = le64dec(resattr + 38); 251 } else { 252 addr = 0; 253 size = 0; 254 } 255 BS->FreePool(resattr); 256 if (addr == 0 || size == 0) 257 continue; 258 259 /* We assume the largest BAR is the frame buffer. */ 260 if (size > *sizep) { 261 *addrp = addr; 262 *sizep = size; 263 } 264 } 265 return ((*addrp == 0 || *sizep == 0) ? EFI_DEVICE_ERROR : 0); 266 } 267 268 static int 269 efifb_from_uga(struct efi_fb *efifb, EFI_UGA_DRAW_PROTOCOL *uga) 270 { 271 EFI_PCI_IO_PROTOCOL *pciio; 272 char *ev, *p; 273 EFI_STATUS status; 274 ssize_t offset; 275 uint64_t fbaddr; 276 uint32_t horiz, vert, stride; 277 uint32_t np, depth, refresh; 278 279 status = uga->GetMode(uga, &horiz, &vert, &depth, &refresh); 280 if (EFI_ERROR(status)) 281 return (1); 282 efifb->fb_height = vert; 283 efifb->fb_width = horiz; 284 /* Paranoia... */ 285 if (efifb->fb_height == 0 || efifb->fb_width == 0) 286 return (1); 287 288 /* The color masks are fixed AFAICT. */ 289 efifb_mask_from_pixfmt(efifb, PixelBlueGreenRedReserved8BitPerColor, 290 NULL); 291 292 /* pciio can be NULL on return! */ 293 pciio = efifb_uga_get_pciio(); 294 295 /* Try to find the frame buffer. */ 296 status = efifb_uga_locate_framebuffer(pciio, &efifb->fb_addr, 297 &efifb->fb_size); 298 if (EFI_ERROR(status)) { 299 efifb->fb_addr = 0; 300 efifb->fb_size = 0; 301 } 302 303 /* 304 * There's no reliable way to detect the frame buffer or the 305 * offset within the frame buffer of the visible region, nor 306 * the stride. Our only option is to look at the system and 307 * fill in the blanks based on that. Luckily, UGA was mostly 308 * only used on Apple hardware. 309 */ 310 offset = -1; 311 ev = getenv("smbios.system.maker"); 312 if (ev != NULL && !strcmp(ev, "Apple Inc.")) { 313 ev = getenv("smbios.system.product"); 314 if (ev != NULL && !strcmp(ev, "iMac7,1")) { 315 /* These are the expected values we should have. */ 316 horiz = 1680; 317 vert = 1050; 318 fbaddr = 0xc0000000; 319 /* These are the missing bits. */ 320 offset = 0x10000; 321 stride = 1728; 322 } else if (ev != NULL && !strcmp(ev, "MacBook3,1")) { 323 /* These are the expected values we should have. */ 324 horiz = 1280; 325 vert = 800; 326 fbaddr = 0xc0000000; 327 /* These are the missing bits. */ 328 offset = 0x0; 329 stride = 2048; 330 } 331 } 332 333 /* 334 * If this is hardware we know, make sure that it looks familiar 335 * before we accept our hardcoded values. 336 */ 337 if (offset >= 0 && efifb->fb_width == horiz && 338 efifb->fb_height == vert && efifb->fb_addr == fbaddr) { 339 efifb->fb_addr += offset; 340 efifb->fb_size -= offset; 341 efifb->fb_stride = stride; 342 return (0); 343 } else if (offset >= 0) { 344 printf("Hardware make/model known, but graphics not " 345 "as expected.\n"); 346 printf("Console may not work!\n"); 347 } 348 349 /* 350 * The stride is equal or larger to the width. Often it's the 351 * next larger power of two. We'll start with that... 352 */ 353 efifb->fb_stride = efifb->fb_width; 354 do { 355 np = efifb->fb_stride & (efifb->fb_stride - 1); 356 if (np) { 357 efifb->fb_stride |= (np - 1); 358 efifb->fb_stride++; 359 } 360 } while (np); 361 362 ev = getenv("hw.efifb.address"); 363 if (ev == NULL) { 364 if (efifb->fb_addr == 0) { 365 printf("Please set hw.efifb.address and " 366 "hw.efifb.stride.\n"); 367 return (1); 368 } 369 370 /* 371 * The visible part of the frame buffer may not start at 372 * offset 0, so try to detect it. Note that we may not 373 * always be able to read from the frame buffer, which 374 * means that we may not be able to detect anything. In 375 * that case, we would take a long time scanning for a 376 * pixel change in the frame buffer, which would have it 377 * appear that we're hanging, so we limit the scan to 378 * 1/256th of the frame buffer. This number is mostly 379 * based on PR 202730 and the fact that on a MacBoook, 380 * where we can't read from the frame buffer the offset 381 * of the visible region is 0. In short: we want to scan 382 * enough to handle all adapters that have an offset 383 * larger than 0 and we want to scan as little as we can 384 * to not appear to hang when we can't read from the 385 * frame buffer. 386 */ 387 offset = efifb_uga_find_pixel(uga, 0, pciio, efifb->fb_addr, 388 efifb->fb_size >> 8); 389 if (offset == -1) { 390 printf("Unable to reliably detect frame buffer.\n"); 391 } else if (offset > 0) { 392 efifb->fb_addr += offset; 393 efifb->fb_size -= offset; 394 } 395 } else { 396 offset = 0; 397 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4; 398 efifb->fb_addr = strtoul(ev, &p, 0); 399 if (*p != '\0') 400 return (1); 401 } 402 403 ev = getenv("hw.efifb.stride"); 404 if (ev == NULL) { 405 if (pciio != NULL && offset != -1) { 406 /* Determine the stride. */ 407 offset = efifb_uga_find_pixel(uga, 1, pciio, 408 efifb->fb_addr, horiz * 8); 409 if (offset != -1) 410 efifb->fb_stride = offset >> 2; 411 } else { 412 printf("Unable to reliably detect the stride.\n"); 413 } 414 } else { 415 efifb->fb_stride = strtoul(ev, &p, 0); 416 if (*p != '\0') 417 return (1); 418 } 419 420 /* 421 * We finalized on the stride, so recalculate the size of the 422 * frame buffer. 423 */ 424 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4; 425 return (0); 426 } 427 428 int 429 efi_find_framebuffer(struct efi_fb *efifb) 430 { 431 EFI_GRAPHICS_OUTPUT *gop; 432 EFI_UGA_DRAW_PROTOCOL *uga; 433 EFI_STATUS status; 434 435 status = BS->LocateProtocol(&gop_guid, NULL, (VOID **)&gop); 436 if (status == EFI_SUCCESS) 437 return (efifb_from_gop(efifb, gop->Mode, gop->Mode->Info)); 438 439 status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga); 440 if (status == EFI_SUCCESS) 441 return (efifb_from_uga(efifb, uga)); 442 443 return (1); 444 } 445 446 static void 447 print_efifb(int mode, struct efi_fb *efifb, int verbose) 448 { 449 u_int depth; 450 451 if (mode >= 0) 452 printf("mode %d: ", mode); 453 depth = efifb_color_depth(efifb); 454 printf("%ux%ux%u, stride=%u", efifb->fb_width, efifb->fb_height, 455 depth, efifb->fb_stride); 456 if (verbose) { 457 printf("\n frame buffer: address=%jx, size=%jx", 458 (uintmax_t)efifb->fb_addr, (uintmax_t)efifb->fb_size); 459 printf("\n color mask: R=%08x, G=%08x, B=%08x\n", 460 efifb->fb_mask_red, efifb->fb_mask_green, 461 efifb->fb_mask_blue); 462 } 463 } 464 465 COMMAND_SET(gop, "gop", "graphics output protocol", command_gop); 466 467 static int 468 command_gop(int argc, char *argv[]) 469 { 470 struct efi_fb efifb; 471 EFI_GRAPHICS_OUTPUT *gop; 472 EFI_STATUS status; 473 u_int mode; 474 475 status = BS->LocateProtocol(&gop_guid, NULL, (VOID **)&gop); 476 if (EFI_ERROR(status)) { 477 snprintf(command_errbuf, sizeof(command_errbuf), 478 "%s: Graphics Output Protocol not present (error=%lu)", 479 argv[0], EFI_ERROR_CODE(status)); 480 return (CMD_ERROR); 481 } 482 483 if (argc < 2) 484 goto usage; 485 486 if (!strcmp(argv[1], "set")) { 487 char *cp; 488 489 if (argc != 3) 490 goto usage; 491 mode = strtol(argv[2], &cp, 0); 492 if (cp[0] != '\0') { 493 sprintf(command_errbuf, "mode is an integer"); 494 return (CMD_ERROR); 495 } 496 status = gop->SetMode(gop, mode); 497 if (EFI_ERROR(status)) { 498 snprintf(command_errbuf, sizeof(command_errbuf), 499 "%s: Unable to set mode to %u (error=%lu)", 500 argv[0], mode, EFI_ERROR_CODE(status)); 501 return (CMD_ERROR); 502 } 503 } else if (!strcmp(argv[1], "get")) { 504 if (argc != 2) 505 goto usage; 506 efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info); 507 print_efifb(gop->Mode->Mode, &efifb, 1); 508 printf("\n"); 509 } else if (!strcmp(argv[1], "list")) { 510 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info; 511 UINTN infosz; 512 513 if (argc != 2) 514 goto usage; 515 pager_open(); 516 for (mode = 0; mode < gop->Mode->MaxMode; mode++) { 517 status = gop->QueryMode(gop, mode, &infosz, &info); 518 if (EFI_ERROR(status)) 519 continue; 520 efifb_from_gop(&efifb, gop->Mode, info); 521 print_efifb(mode, &efifb, 0); 522 if (pager_output("\n")) 523 break; 524 } 525 pager_close(); 526 } 527 return (CMD_OK); 528 529 usage: 530 snprintf(command_errbuf, sizeof(command_errbuf), 531 "usage: %s [list | get | set <mode>]", argv[0]); 532 return (CMD_ERROR); 533 } 534 535 COMMAND_SET(uga, "uga", "universal graphics adapter", command_uga); 536 537 static int 538 command_uga(int argc, char *argv[]) 539 { 540 struct efi_fb efifb; 541 EFI_UGA_DRAW_PROTOCOL *uga; 542 EFI_STATUS status; 543 544 status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga); 545 if (EFI_ERROR(status)) { 546 snprintf(command_errbuf, sizeof(command_errbuf), 547 "%s: UGA Protocol not present (error=%lu)", 548 argv[0], EFI_ERROR_CODE(status)); 549 return (CMD_ERROR); 550 } 551 552 if (argc != 1) 553 goto usage; 554 555 if (efifb_from_uga(&efifb, uga) != CMD_OK) { 556 snprintf(command_errbuf, sizeof(command_errbuf), 557 "%s: Unable to get UGA information", argv[0]); 558 return (CMD_ERROR); 559 } 560 561 print_efifb(-1, &efifb, 1); 562 printf("\n"); 563 return (CMD_OK); 564 565 usage: 566 snprintf(command_errbuf, sizeof(command_errbuf), "usage: %s", argv[0]); 567 return (CMD_ERROR); 568 } 569