2 * Copyright (c) 2013 The FreeBSD Foundation
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
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.
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
28 * $FreeBSD: head/sys/boot/efi/loader/arch/amd64/framebuffer.c 304532 2016-08-20 16:23:19Z tsoome $
31 #include <bootstrap.h>
32 #include <sys/endian.h>
38 #include <machine/metadata.h>
40 #include "framebuffer.h"
42 static EFI_GUID gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
43 static EFI_GUID pciio_guid = EFI_PCI_IO_PROTOCOL_GUID;
44 static EFI_GUID uga_guid = EFI_UGA_DRAW_PROTOCOL_GUID;
47 efi_framebuffer_bpp(struct efi_fb *efifb)
52 mask = efifb->fb_mask_red | efifb->fb_mask_green |
53 efifb->fb_mask_blue | efifb->fb_mask_reserved;
56 for (depth = 1; mask != 1; depth++)
62 efifb_mask_from_pixfmt(struct efi_fb *efifb, EFI_GRAPHICS_PIXEL_FORMAT pixfmt,
63 EFI_PIXEL_BITMASK *pixinfo)
69 case PixelRedGreenBlueReserved8BitPerColor:
70 efifb->fb_mask_red = 0x000000ff;
71 efifb->fb_mask_green = 0x0000ff00;
72 efifb->fb_mask_blue = 0x00ff0000;
73 efifb->fb_mask_reserved = 0xff000000;
75 case PixelBlueGreenRedReserved8BitPerColor:
76 efifb->fb_mask_red = 0x00ff0000;
77 efifb->fb_mask_green = 0x0000ff00;
78 efifb->fb_mask_blue = 0x000000ff;
79 efifb->fb_mask_reserved = 0xff000000;
82 efifb->fb_mask_red = pixinfo->RedMask;
83 efifb->fb_mask_green = pixinfo->GreenMask;
84 efifb->fb_mask_blue = pixinfo->BlueMask;
85 efifb->fb_mask_reserved = pixinfo->ReservedMask;
95 efifb_from_gop(struct efi_fb *efifb, EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *mode,
96 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info)
100 efifb->fb_addr = mode->FrameBufferBase;
101 efifb->fb_size = mode->FrameBufferSize;
102 efifb->fb_height = info->VerticalResolution;
103 efifb->fb_width = info->HorizontalResolution;
104 efifb->fb_stride = info->PixelsPerScanLine;
105 result = efifb_mask_from_pixfmt(efifb, info->PixelFormat,
106 &info->PixelInformation);
111 efifb_uga_find_pixel(EFI_UGA_DRAW_PROTOCOL *uga, u_int line,
112 EFI_PCI_IO_PROTOCOL *pciio, uint64_t addr, uint64_t size)
114 EFI_UGA_PIXEL pix0, pix1;
115 uint8_t *data1, *data2;
116 size_t count, maxcount = 1024;
121 status = uga->Blt(uga, &pix0, EfiUgaVideoToBltBuffer,
122 0, line, 0, 0, 1, 1, 0);
123 if (EFI_ERROR(status)) {
124 printf("UGA BLT operation failed (video->buffer)");
127 pix1.Red = ~pix0.Red;
128 pix1.Green = ~pix0.Green;
129 pix1.Blue = ~pix0.Blue;
132 data1 = calloc(maxcount, 2);
134 printf("Unable to allocate memory");
137 data2 = data1 + maxcount;
141 count = min(size, maxcount);
143 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
144 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
146 if (EFI_ERROR(status)) {
147 printf("Error reading frame buffer (before)");
150 status = uga->Blt(uga, &pix1, EfiUgaBltBufferToVideo,
151 0, 0, 0, line, 1, 1, 0);
152 if (EFI_ERROR(status)) {
153 printf("UGA BLT operation failed (modify)");
156 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
157 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
159 if (EFI_ERROR(status)) {
160 printf("Error reading frame buffer (after)");
163 status = uga->Blt(uga, &pix0, EfiUgaBltBufferToVideo,
164 0, 0, 0, line, 1, 1, 0);
165 if (EFI_ERROR(status)) {
166 printf("UGA BLT operation failed (restore)");
169 for (idx = 0; idx < count; idx++) {
170 if (data1[idx] != data2[idx]) {
172 return (ofs + (idx & ~3));
178 printf("No change detected in frame buffer");
181 printf(" -- error %llu\n", status);
186 static EFI_PCI_IO_PROTOCOL *
187 efifb_uga_get_pciio(void)
189 EFI_PCI_IO_PROTOCOL *pciio;
190 EFI_HANDLE *buf, *hp;
194 /* Get all handles that support the UGA protocol. */
196 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, NULL);
197 if (status != EFI_BUFFER_TOO_SMALL)
200 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, buf);
201 if (status != EFI_SUCCESS) {
205 bufsz /= sizeof(EFI_HANDLE);
207 /* Get the PCI I/O interface of the first handle that supports it. */
209 for (hp = buf; hp < buf + bufsz; hp++) {
210 status = BS->HandleProtocol(*hp, &pciio_guid, (void **)&pciio);
211 if (status == EFI_SUCCESS) {
221 efifb_uga_locate_framebuffer(EFI_PCI_IO_PROTOCOL *pciio, uint64_t *addrp,
230 return (EFI_DEVICE_ERROR);
232 /* Attempt to get the frame buffer address (imprecise). */
235 for (bar = 0; bar < 6; bar++) {
236 status = pciio->GetBarAttributes(pciio, bar, NULL,
238 if (status != EFI_SUCCESS)
240 /* XXX magic offsets and constants. */
241 if (resattr[0] == 0x87 && resattr[3] == 0) {
242 /* 32-bit address space descriptor (MEMIO) */
243 addr = le32dec(resattr + 10);
244 size = le32dec(resattr + 22);
245 } else if (resattr[0] == 0x8a && resattr[3] == 0) {
246 /* 64-bit address space descriptor (MEMIO) */
247 addr = le64dec(resattr + 14);
248 size = le64dec(resattr + 38);
253 BS->FreePool(resattr);
254 if (addr == 0 || size == 0)
257 /* We assume the largest BAR is the frame buffer. */
263 return ((*addrp == 0 || *sizep == 0) ? EFI_DEVICE_ERROR : 0);
267 efifb_from_uga(struct efi_fb *efifb, EFI_UGA_DRAW_PROTOCOL *uga)
269 EFI_PCI_IO_PROTOCOL *pciio;
274 uint32_t horiz, vert, stride;
275 uint32_t np, depth, refresh;
277 status = uga->GetMode(uga, &horiz, &vert, &depth, &refresh);
278 if (EFI_ERROR(status))
280 efifb->fb_height = vert;
281 efifb->fb_width = horiz;
283 if (efifb->fb_height == 0 || efifb->fb_width == 0)
286 /* The color masks are fixed AFAICT. */
287 efifb_mask_from_pixfmt(efifb, PixelBlueGreenRedReserved8BitPerColor,
290 /* pciio can be NULL on return! */
291 pciio = efifb_uga_get_pciio();
293 /* Try to find the frame buffer. */
294 status = efifb_uga_locate_framebuffer(pciio, &efifb->fb_addr,
296 if (EFI_ERROR(status)) {
302 * There's no reliable way to detect the frame buffer or the
303 * offset within the frame buffer of the visible region, nor
304 * the stride. Our only option is to look at the system and
305 * fill in the blanks based on that. Luckily, UGA was mostly
306 * only used on Apple hardware.
309 ev = getenv("smbios.system.maker");
310 if (ev != NULL && !strcmp(ev, "Apple Inc.")) {
311 ev = getenv("smbios.system.product");
312 if (ev != NULL && !strcmp(ev, "iMac7,1")) {
313 /* These are the expected values we should have. */
317 /* These are the missing bits. */
320 } else if (ev != NULL && !strcmp(ev, "MacBook3,1")) {
321 /* These are the expected values we should have. */
325 /* These are the missing bits. */
332 * If this is hardware we know, make sure that it looks familiar
333 * before we accept our hardcoded values.
335 if (offset >= 0 && efifb->fb_width == horiz &&
336 efifb->fb_height == vert && efifb->fb_addr == fbaddr) {
337 efifb->fb_addr += offset;
338 efifb->fb_size -= offset;
339 efifb->fb_stride = stride;
341 } else if (offset >= 0) {
342 printf("Hardware make/model known, but graphics not "
344 printf("Console may not work!\n");
348 * The stride is equal or larger to the width. Often it's the
349 * next larger power of two. We'll start with that...
351 efifb->fb_stride = efifb->fb_width;
353 np = efifb->fb_stride & (efifb->fb_stride - 1);
355 efifb->fb_stride |= (np - 1);
360 ev = getenv("hw.efifb.address");
362 if (efifb->fb_addr == 0) {
363 printf("Please set hw.efifb.address and "
364 "hw.efifb.stride.\n");
369 * The visible part of the frame buffer may not start at
370 * offset 0, so try to detect it. Note that we may not
371 * always be able to read from the frame buffer, which
372 * means that we may not be able to detect anything. In
373 * that case, we would take a long time scanning for a
374 * pixel change in the frame buffer, which would have it
375 * appear that we're hanging, so we limit the scan to
376 * 1/256th of the frame buffer. This number is mostly
377 * based on PR 202730 and the fact that on a MacBoook,
378 * where we can't read from the frame buffer the offset
379 * of the visible region is 0. In short: we want to scan
380 * enough to handle all adapters that have an offset
381 * larger than 0 and we want to scan as little as we can
382 * to not appear to hang when we can't read from the
385 offset = efifb_uga_find_pixel(uga, 0, pciio, efifb->fb_addr,
386 efifb->fb_size >> 8);
388 printf("Unable to reliably detect frame buffer.\n");
389 } else if (offset > 0) {
390 efifb->fb_addr += offset;
391 efifb->fb_size -= offset;
395 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
396 efifb->fb_addr = strtoul(ev, &p, 0);
401 ev = getenv("hw.efifb.stride");
403 if (pciio != NULL && offset != -1) {
404 /* Determine the stride. */
405 offset = efifb_uga_find_pixel(uga, 1, pciio,
406 efifb->fb_addr, horiz * 8);
408 efifb->fb_stride = offset >> 2;
410 printf("Unable to reliably detect the stride.\n");
413 efifb->fb_stride = strtoul(ev, &p, 0);
419 * We finalized on the stride, so recalculate the size of the
422 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
427 efi_find_framebuffer(struct efi_fb *efifb)
429 EFI_GRAPHICS_OUTPUT_PROTOCOL *gop;
430 EFI_UGA_DRAW_PROTOCOL *uga;
433 status = BS->LocateProtocol(&gop_guid, NULL, (VOID **)&gop);
434 if (status == EFI_SUCCESS)
435 return (efifb_from_gop(efifb, gop->Mode, gop->Mode->Info));
437 status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga);
438 if (status == EFI_SUCCESS)
439 return (efifb_from_uga(efifb, uga));
445 print_efifb(int mode, struct efi_fb *efifb, int verbose)
450 printf("mode %d: ", mode);
451 depth = efi_framebuffer_bpp(efifb);
452 printf("%ux%ux%u, stride=%u", efifb->fb_width, efifb->fb_height,
453 depth, efifb->fb_stride);
455 printf("\n frame buffer: address=%jx, size=%jx",
456 (uintmax_t)efifb->fb_addr, (uintmax_t)efifb->fb_size);
457 printf("\n color mask: R=%08x, G=%08x, B=%08x\n",
458 efifb->fb_mask_red, efifb->fb_mask_green,
459 efifb->fb_mask_blue);
463 COMMAND_SET(gop, "gop", "graphics output protocol", command_gop);
466 command_gop(int argc, char *argv[])
469 EFI_GRAPHICS_OUTPUT_PROTOCOL *gop;
473 status = BS->LocateProtocol(&gop_guid, NULL, (VOID **)&gop);
474 if (EFI_ERROR(status)) {
475 snprintf(command_errbuf, sizeof(command_errbuf),
476 "%s: Graphics Output Protocol not present (error=%llu)",
484 if (!strcmp(argv[1], "set")) {
489 mode = strtol(argv[2], &cp, 0);
491 sprintf(command_errbuf, "mode is an integer");
494 status = gop->SetMode(gop, mode);
495 if (EFI_ERROR(status)) {
496 snprintf(command_errbuf, sizeof(command_errbuf),
497 "%s: Unable to set mode to %u (error=%llu)",
498 argv[0], mode, status);
501 } else if (!strcmp(argv[1], "get")) {
504 efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info);
505 print_efifb(gop->Mode->Mode, &efifb, 1);
507 } else if (!strcmp(argv[1], "list")) {
508 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
514 for (mode = 0; mode < gop->Mode->MaxMode; mode++) {
515 status = gop->QueryMode(gop, mode, &infosz, &info);
516 if (EFI_ERROR(status))
518 efifb_from_gop(&efifb, gop->Mode, info);
519 print_efifb(mode, &efifb, 0);
520 if (pager_output("\n"))
528 snprintf(command_errbuf, sizeof(command_errbuf),
529 "usage: %s [list | get | set <mode>]", argv[0]);
533 COMMAND_SET(uga, "uga", "universal graphics adapter", command_uga);
536 command_uga(int argc, char *argv[])
539 EFI_UGA_DRAW_PROTOCOL *uga;
542 status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga);
543 if (EFI_ERROR(status)) {
544 snprintf(command_errbuf, sizeof(command_errbuf),
545 "%s: UGA Protocol not present (error=%llu)",
553 if (efifb_from_uga(&efifb, uga) != CMD_OK) {
554 snprintf(command_errbuf, sizeof(command_errbuf),
555 "%s: Unable to get UGA information", argv[0]);
559 print_efifb(-1, &efifb, 1);
564 snprintf(command_errbuf, sizeof(command_errbuf), "usage: %s", argv[0]);