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 <sys/param.h>
35 #include <stand.h>
36
37 #include <efi.h>
38 #include <efilib.h>
39 #include <efiuga.h>
40 #include <efipciio.h>
41 #include <Protocol/EdidActive.h>
42 #include <Protocol/EdidDiscovered.h>
43 #include <machine/metadata.h>
44
45 #include "bootstrap.h"
46 #include "framebuffer.h"
47
48 static EFI_GUID conout_guid = EFI_CONSOLE_OUT_DEVICE_GUID;
49 EFI_GUID gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
50 static EFI_GUID pciio_guid = EFI_PCI_IO_PROTOCOL_GUID;
51 static EFI_GUID uga_guid = EFI_UGA_DRAW_PROTOCOL_GUID;
52 static EFI_GUID active_edid_guid = EFI_EDID_ACTIVE_PROTOCOL_GUID;
53 static EFI_GUID discovered_edid_guid = EFI_EDID_DISCOVERED_PROTOCOL_GUID;
54 static EFI_HANDLE gop_handle;
55
56 /* Cached EDID. */
57 struct vesa_edid_info *edid_info = NULL;
58
59 static EFI_GRAPHICS_OUTPUT *gop;
60 static EFI_UGA_DRAW_PROTOCOL *uga;
61
62 static struct named_resolution {
63 const char *name;
64 const char *alias;
65 unsigned int width;
66 unsigned int height;
67 } resolutions[] = {
68 {
69 .name = "480p",
70 .width = 640,
71 .height = 480,
72 },
73 {
74 .name = "720p",
75 .width = 1280,
76 .height = 720,
77 },
78 {
79 .name = "1080p",
80 .width = 1920,
81 .height = 1080,
82 },
83 {
84 .name = "2160p",
85 .alias = "4k",
86 .width = 3840,
87 .height = 2160,
88 },
89 {
90 .name = "5k",
91 .width = 5120,
92 .height = 2880,
93 }
94 };
95
96 static u_int
efifb_color_depth(struct efi_fb * efifb)97 efifb_color_depth(struct efi_fb *efifb)
98 {
99 uint32_t mask;
100 u_int depth;
101
102 mask = efifb->fb_mask_red | efifb->fb_mask_green |
103 efifb->fb_mask_blue | efifb->fb_mask_reserved;
104 if (mask == 0)
105 return (0);
106 for (depth = 1; mask != 1; depth++)
107 mask >>= 1;
108 return (depth);
109 }
110
111 static int
efifb_mask_from_pixfmt(struct efi_fb * efifb,EFI_GRAPHICS_PIXEL_FORMAT pixfmt,EFI_PIXEL_BITMASK * pixinfo)112 efifb_mask_from_pixfmt(struct efi_fb *efifb, EFI_GRAPHICS_PIXEL_FORMAT pixfmt,
113 EFI_PIXEL_BITMASK *pixinfo)
114 {
115 int result;
116
117 result = 0;
118 switch (pixfmt) {
119 case PixelRedGreenBlueReserved8BitPerColor:
120 case PixelBltOnly:
121 efifb->fb_mask_red = 0x000000ff;
122 efifb->fb_mask_green = 0x0000ff00;
123 efifb->fb_mask_blue = 0x00ff0000;
124 efifb->fb_mask_reserved = 0xff000000;
125 break;
126 case PixelBlueGreenRedReserved8BitPerColor:
127 efifb->fb_mask_red = 0x00ff0000;
128 efifb->fb_mask_green = 0x0000ff00;
129 efifb->fb_mask_blue = 0x000000ff;
130 efifb->fb_mask_reserved = 0xff000000;
131 break;
132 case PixelBitMask:
133 efifb->fb_mask_red = pixinfo->RedMask;
134 efifb->fb_mask_green = pixinfo->GreenMask;
135 efifb->fb_mask_blue = pixinfo->BlueMask;
136 efifb->fb_mask_reserved = pixinfo->ReservedMask;
137 break;
138 default:
139 result = 1;
140 break;
141 }
142 return (result);
143 }
144
145 static int
efifb_from_gop(struct efi_fb * efifb,EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE * mode,EFI_GRAPHICS_OUTPUT_MODE_INFORMATION * info)146 efifb_from_gop(struct efi_fb *efifb, EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *mode,
147 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info)
148 {
149 int result;
150
151 efifb->fb_addr = mode->FrameBufferBase;
152 efifb->fb_size = mode->FrameBufferSize;
153 efifb->fb_height = info->VerticalResolution;
154 efifb->fb_width = info->HorizontalResolution;
155 efifb->fb_stride = info->PixelsPerScanLine;
156 result = efifb_mask_from_pixfmt(efifb, info->PixelFormat,
157 &info->PixelInformation);
158 return (result);
159 }
160
161 static ssize_t
efifb_uga_find_pixel(EFI_UGA_DRAW_PROTOCOL * uga,u_int line,EFI_PCI_IO_PROTOCOL * pciio,uint64_t addr,uint64_t size)162 efifb_uga_find_pixel(EFI_UGA_DRAW_PROTOCOL *uga, u_int line,
163 EFI_PCI_IO_PROTOCOL *pciio, uint64_t addr, uint64_t size)
164 {
165 EFI_UGA_PIXEL pix0, pix1;
166 uint8_t *data1, *data2;
167 size_t count, maxcount = 1024;
168 ssize_t ofs;
169 EFI_STATUS status;
170 u_int idx;
171
172 status = uga->Blt(uga, &pix0, EfiUgaVideoToBltBuffer,
173 0, line, 0, 0, 1, 1, 0);
174 if (EFI_ERROR(status)) {
175 printf("UGA BLT operation failed (video->buffer)");
176 return (-1);
177 }
178 pix1.Red = ~pix0.Red;
179 pix1.Green = ~pix0.Green;
180 pix1.Blue = ~pix0.Blue;
181 pix1.Reserved = 0;
182
183 data1 = calloc(maxcount, 2);
184 if (data1 == NULL) {
185 printf("Unable to allocate memory");
186 return (-1);
187 }
188 data2 = data1 + maxcount;
189
190 ofs = 0;
191 while (size > 0) {
192 count = min(size, maxcount);
193
194 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
195 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
196 data1);
197 if (EFI_ERROR(status)) {
198 printf("Error reading frame buffer (before)");
199 goto fail;
200 }
201 status = uga->Blt(uga, &pix1, EfiUgaBltBufferToVideo,
202 0, 0, 0, line, 1, 1, 0);
203 if (EFI_ERROR(status)) {
204 printf("UGA BLT operation failed (modify)");
205 goto fail;
206 }
207 status = pciio->Mem.Read(pciio, EfiPciIoWidthUint32,
208 EFI_PCI_IO_PASS_THROUGH_BAR, addr + ofs, count >> 2,
209 data2);
210 if (EFI_ERROR(status)) {
211 printf("Error reading frame buffer (after)");
212 goto fail;
213 }
214 status = uga->Blt(uga, &pix0, EfiUgaBltBufferToVideo,
215 0, 0, 0, line, 1, 1, 0);
216 if (EFI_ERROR(status)) {
217 printf("UGA BLT operation failed (restore)");
218 goto fail;
219 }
220 for (idx = 0; idx < count; idx++) {
221 if (data1[idx] != data2[idx]) {
222 free(data1);
223 return (ofs + (idx & ~3));
224 }
225 }
226 ofs += count;
227 size -= count;
228 }
229 printf("No change detected in frame buffer");
230
231 fail:
232 printf(" -- error %lu\n", EFI_ERROR_CODE(status));
233 free(data1);
234 return (-1);
235 }
236
237 static EFI_PCI_IO_PROTOCOL *
efifb_uga_get_pciio(void)238 efifb_uga_get_pciio(void)
239 {
240 EFI_PCI_IO_PROTOCOL *pciio;
241 EFI_HANDLE *buf, *hp;
242 EFI_STATUS status;
243 UINTN bufsz;
244
245 /* Get all handles that support the UGA protocol. */
246 bufsz = 0;
247 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, NULL);
248 if (status != EFI_BUFFER_TOO_SMALL)
249 return (NULL);
250 buf = malloc(bufsz);
251 status = BS->LocateHandle(ByProtocol, &uga_guid, NULL, &bufsz, buf);
252 if (status != EFI_SUCCESS) {
253 free(buf);
254 return (NULL);
255 }
256 bufsz /= sizeof(EFI_HANDLE);
257
258 /* Get the PCI I/O interface of the first handle that supports it. */
259 pciio = NULL;
260 for (hp = buf; hp < buf + bufsz; hp++) {
261 status = OpenProtocolByHandle(*hp, &pciio_guid,
262 (void **)&pciio);
263 if (status == EFI_SUCCESS) {
264 free(buf);
265 return (pciio);
266 }
267 }
268 free(buf);
269 return (NULL);
270 }
271
272 static EFI_STATUS
efifb_uga_locate_framebuffer(EFI_PCI_IO_PROTOCOL * pciio,uint64_t * addrp,uint64_t * sizep)273 efifb_uga_locate_framebuffer(EFI_PCI_IO_PROTOCOL *pciio, uint64_t *addrp,
274 uint64_t *sizep)
275 {
276 uint8_t *resattr;
277 uint64_t addr, size;
278 EFI_STATUS status;
279 u_int bar;
280
281 if (pciio == NULL)
282 return (EFI_DEVICE_ERROR);
283
284 /* Attempt to get the frame buffer address (imprecise). */
285 *addrp = 0;
286 *sizep = 0;
287 for (bar = 0; bar < 6; bar++) {
288 status = pciio->GetBarAttributes(pciio, bar, NULL,
289 (void **)&resattr);
290 if (status != EFI_SUCCESS)
291 continue;
292 /* XXX magic offsets and constants. */
293 if (resattr[0] == 0x87 && resattr[3] == 0) {
294 /* 32-bit address space descriptor (MEMIO) */
295 addr = le32dec(resattr + 10);
296 size = le32dec(resattr + 22);
297 } else if (resattr[0] == 0x8a && resattr[3] == 0) {
298 /* 64-bit address space descriptor (MEMIO) */
299 addr = le64dec(resattr + 14);
300 size = le64dec(resattr + 38);
301 } else {
302 addr = 0;
303 size = 0;
304 }
305 BS->FreePool(resattr);
306 if (addr == 0 || size == 0)
307 continue;
308
309 /* We assume the largest BAR is the frame buffer. */
310 if (size > *sizep) {
311 *addrp = addr;
312 *sizep = size;
313 }
314 }
315 return ((*addrp == 0 || *sizep == 0) ? EFI_DEVICE_ERROR : 0);
316 }
317
318 static int
efifb_from_uga(struct efi_fb * efifb)319 efifb_from_uga(struct efi_fb *efifb)
320 {
321 EFI_PCI_IO_PROTOCOL *pciio;
322 char *ev, *p;
323 EFI_STATUS status;
324 ssize_t offset;
325 uint64_t fbaddr;
326 uint32_t horiz, vert, stride;
327 uint32_t np, depth, refresh;
328
329 status = uga->GetMode(uga, &horiz, &vert, &depth, &refresh);
330 if (EFI_ERROR(status))
331 return (1);
332 efifb->fb_height = vert;
333 efifb->fb_width = horiz;
334 /* Paranoia... */
335 if (efifb->fb_height == 0 || efifb->fb_width == 0)
336 return (1);
337
338 /* The color masks are fixed AFAICT. */
339 efifb_mask_from_pixfmt(efifb, PixelBlueGreenRedReserved8BitPerColor,
340 NULL);
341
342 /* pciio can be NULL on return! */
343 pciio = efifb_uga_get_pciio();
344
345 /* Try to find the frame buffer. */
346 status = efifb_uga_locate_framebuffer(pciio, &efifb->fb_addr,
347 &efifb->fb_size);
348 if (EFI_ERROR(status)) {
349 efifb->fb_addr = 0;
350 efifb->fb_size = 0;
351 }
352
353 /*
354 * There's no reliable way to detect the frame buffer or the
355 * offset within the frame buffer of the visible region, nor
356 * the stride. Our only option is to look at the system and
357 * fill in the blanks based on that. Luckily, UGA was mostly
358 * only used on Apple hardware.
359 */
360 offset = -1;
361 ev = getenv("smbios.system.maker");
362 if (ev != NULL && !strcmp(ev, "Apple Inc.")) {
363 ev = getenv("smbios.system.product");
364 if (ev != NULL && !strcmp(ev, "iMac7,1")) {
365 /* These are the expected values we should have. */
366 horiz = 1680;
367 vert = 1050;
368 fbaddr = 0xc0000000;
369 /* These are the missing bits. */
370 offset = 0x10000;
371 stride = 1728;
372 } else if (ev != NULL && !strcmp(ev, "MacBook3,1")) {
373 /* These are the expected values we should have. */
374 horiz = 1280;
375 vert = 800;
376 fbaddr = 0xc0000000;
377 /* These are the missing bits. */
378 offset = 0x0;
379 stride = 2048;
380 }
381 }
382
383 /*
384 * If this is hardware we know, make sure that it looks familiar
385 * before we accept our hardcoded values.
386 */
387 if (offset >= 0 && efifb->fb_width == horiz &&
388 efifb->fb_height == vert && efifb->fb_addr == fbaddr) {
389 efifb->fb_addr += offset;
390 efifb->fb_size -= offset;
391 efifb->fb_stride = stride;
392 return (0);
393 } else if (offset >= 0) {
394 printf("Hardware make/model known, but graphics not "
395 "as expected.\n");
396 printf("Console may not work!\n");
397 }
398
399 /*
400 * The stride is equal or larger to the width. Often it's the
401 * next larger power of two. We'll start with that...
402 */
403 efifb->fb_stride = efifb->fb_width;
404 do {
405 np = efifb->fb_stride & (efifb->fb_stride - 1);
406 if (np) {
407 efifb->fb_stride |= (np - 1);
408 efifb->fb_stride++;
409 }
410 } while (np);
411
412 ev = getenv("hw.efifb.address");
413 if (ev == NULL) {
414 if (efifb->fb_addr == 0) {
415 printf("Please set hw.efifb.address and "
416 "hw.efifb.stride.\n");
417 return (1);
418 }
419
420 /*
421 * The visible part of the frame buffer may not start at
422 * offset 0, so try to detect it. Note that we may not
423 * always be able to read from the frame buffer, which
424 * means that we may not be able to detect anything. In
425 * that case, we would take a long time scanning for a
426 * pixel change in the frame buffer, which would have it
427 * appear that we're hanging, so we limit the scan to
428 * 1/256th of the frame buffer. This number is mostly
429 * based on PR 202730 and the fact that on a MacBoook,
430 * where we can't read from the frame buffer the offset
431 * of the visible region is 0. In short: we want to scan
432 * enough to handle all adapters that have an offset
433 * larger than 0 and we want to scan as little as we can
434 * to not appear to hang when we can't read from the
435 * frame buffer.
436 */
437 offset = efifb_uga_find_pixel(uga, 0, pciio, efifb->fb_addr,
438 efifb->fb_size >> 8);
439 if (offset == -1) {
440 printf("Unable to reliably detect frame buffer.\n");
441 } else if (offset > 0) {
442 efifb->fb_addr += offset;
443 efifb->fb_size -= offset;
444 }
445 } else {
446 offset = 0;
447 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
448 efifb->fb_addr = strtoul(ev, &p, 0);
449 if (*p != '\0')
450 return (1);
451 }
452
453 ev = getenv("hw.efifb.stride");
454 if (ev == NULL) {
455 if (pciio != NULL && offset != -1) {
456 /* Determine the stride. */
457 offset = efifb_uga_find_pixel(uga, 1, pciio,
458 efifb->fb_addr, horiz * 8);
459 if (offset != -1)
460 efifb->fb_stride = offset >> 2;
461 } else {
462 printf("Unable to reliably detect the stride.\n");
463 }
464 } else {
465 efifb->fb_stride = strtoul(ev, &p, 0);
466 if (*p != '\0')
467 return (1);
468 }
469
470 /*
471 * We finalized on the stride, so recalculate the size of the
472 * frame buffer.
473 */
474 efifb->fb_size = efifb->fb_height * efifb->fb_stride * 4;
475 return (0);
476 }
477
478 /*
479 * Fetch EDID info. Caller must free the buffer.
480 */
481 static struct vesa_edid_info *
efifb_gop_get_edid(EFI_HANDLE h)482 efifb_gop_get_edid(EFI_HANDLE h)
483 {
484 const uint8_t magic[] = EDID_MAGIC;
485 EFI_EDID_ACTIVE_PROTOCOL *edid;
486 struct vesa_edid_info *edid_infop;
487 EFI_GUID *guid;
488 EFI_STATUS status;
489 size_t size;
490
491 guid = &active_edid_guid;
492 status = BS->OpenProtocol(h, guid, (void **)&edid, IH, NULL,
493 EFI_OPEN_PROTOCOL_GET_PROTOCOL);
494 if (status != EFI_SUCCESS ||
495 edid->SizeOfEdid == 0) {
496 guid = &discovered_edid_guid;
497 status = BS->OpenProtocol(h, guid, (void **)&edid, IH, NULL,
498 EFI_OPEN_PROTOCOL_GET_PROTOCOL);
499 if (status != EFI_SUCCESS ||
500 edid->SizeOfEdid == 0)
501 return (NULL);
502 }
503
504 size = MAX(sizeof(*edid_infop), edid->SizeOfEdid);
505
506 edid_infop = calloc(1, size);
507 if (edid_infop == NULL)
508 return (NULL);
509
510 memcpy(edid_infop, edid->Edid, edid->SizeOfEdid);
511
512 /* Validate EDID */
513 if (memcmp(edid_infop, magic, sizeof (magic)) != 0)
514 goto error;
515
516 if (edid_infop->header.version != 1)
517 goto error;
518
519 return (edid_infop);
520 error:
521 free(edid_infop);
522 return (NULL);
523 }
524
525 static bool
efifb_get_edid(edid_res_list_t * res)526 efifb_get_edid(edid_res_list_t *res)
527 {
528 bool rv = false;
529
530 if (edid_info == NULL)
531 edid_info = efifb_gop_get_edid(gop_handle);
532
533 if (edid_info != NULL)
534 rv = gfx_get_edid_resolution(edid_info, res);
535
536 return (rv);
537 }
538
539 int
efi_find_framebuffer(teken_gfx_t * gfx_state)540 efi_find_framebuffer(teken_gfx_t *gfx_state)
541 {
542 EFI_HANDLE *hlist;
543 UINTN nhandles, i, hsize;
544 struct efi_fb efifb;
545 EFI_STATUS status;
546 int rv;
547
548 gfx_state->tg_fb_type = FB_TEXT;
549
550 hsize = 0;
551 hlist = NULL;
552 status = BS->LocateHandle(ByProtocol, &gop_guid, NULL, &hsize, hlist);
553 if (status == EFI_BUFFER_TOO_SMALL) {
554 hlist = malloc(hsize);
555 if (hlist == NULL)
556 return (ENOMEM);
557 status = BS->LocateHandle(ByProtocol, &gop_guid, NULL, &hsize,
558 hlist);
559 if (EFI_ERROR(status))
560 free(hlist);
561 }
562 if (EFI_ERROR(status))
563 return (efi_status_to_errno(status));
564
565 nhandles = hsize / sizeof(*hlist);
566
567 /*
568 * Search for ConOut protocol, if not found, use first handle.
569 */
570 gop_handle = NULL;
571 for (i = 0; i < nhandles; i++) {
572 EFI_GRAPHICS_OUTPUT *tgop;
573 void *dummy;
574
575 status = OpenProtocolByHandle(hlist[i], &gop_guid, (void **)&tgop);
576 if (status != EFI_SUCCESS)
577 continue;
578
579 if (tgop->Mode->Info->PixelFormat == PixelBltOnly ||
580 tgop->Mode->Info->PixelFormat >= PixelFormatMax)
581 continue;
582
583 status = OpenProtocolByHandle(hlist[i], &conout_guid, &dummy);
584 if (status == EFI_SUCCESS) {
585 gop_handle = hlist[i];
586 gop = tgop;
587 break;
588 } else if (gop_handle == NULL) {
589 gop_handle = hlist[i];
590 gop = tgop;
591 }
592 }
593
594 free(hlist);
595
596 if (gop_handle != NULL) {
597 gfx_state->tg_fb_type = FB_GOP;
598 gfx_state->tg_private = gop;
599 if (edid_info == NULL)
600 edid_info = efifb_gop_get_edid(gop_handle);
601 } else {
602 status = BS->LocateProtocol(&uga_guid, NULL, (VOID **)&uga);
603 if (status == EFI_SUCCESS) {
604 gfx_state->tg_fb_type = FB_UGA;
605 gfx_state->tg_private = uga;
606 } else {
607 return (1);
608 }
609 }
610
611 switch (gfx_state->tg_fb_type) {
612 case FB_GOP:
613 rv = efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info);
614 break;
615
616 case FB_UGA:
617 rv = efifb_from_uga(&efifb);
618 break;
619
620 default:
621 return (1);
622 }
623
624 gfx_state->tg_fb.fb_addr = efifb.fb_addr;
625 gfx_state->tg_fb.fb_size = efifb.fb_size;
626 gfx_state->tg_fb.fb_height = efifb.fb_height;
627 gfx_state->tg_fb.fb_width = efifb.fb_width;
628 gfx_state->tg_fb.fb_stride = efifb.fb_stride;
629 gfx_state->tg_fb.fb_mask_red = efifb.fb_mask_red;
630 gfx_state->tg_fb.fb_mask_green = efifb.fb_mask_green;
631 gfx_state->tg_fb.fb_mask_blue = efifb.fb_mask_blue;
632 gfx_state->tg_fb.fb_mask_reserved = efifb.fb_mask_reserved;
633
634 gfx_state->tg_fb.fb_bpp = fls(efifb.fb_mask_red | efifb.fb_mask_green |
635 efifb.fb_mask_blue | efifb.fb_mask_reserved);
636
637 if (gfx_state->tg_shadow_fb != NULL)
638 BS->FreePages((EFI_PHYSICAL_ADDRESS)gfx_state->tg_shadow_fb,
639 gfx_state->tg_shadow_sz);
640 gfx_state->tg_shadow_sz =
641 EFI_SIZE_TO_PAGES(efifb.fb_height * efifb.fb_width *
642 sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL));
643 status = BS->AllocatePages(AllocateMaxAddress, EfiLoaderData,
644 gfx_state->tg_shadow_sz,
645 (EFI_PHYSICAL_ADDRESS *)&gfx_state->tg_shadow_fb);
646 if (status != EFI_SUCCESS)
647 gfx_state->tg_shadow_fb = NULL;
648
649 return (0);
650 }
651
652 static void
print_efifb(int mode,struct efi_fb * efifb,int verbose)653 print_efifb(int mode, struct efi_fb *efifb, int verbose)
654 {
655 u_int depth;
656
657 if (mode >= 0)
658 printf("mode %d: ", mode);
659 depth = efifb_color_depth(efifb);
660 printf("%ux%ux%u, stride=%u", efifb->fb_width, efifb->fb_height,
661 depth, efifb->fb_stride);
662 if (verbose) {
663 printf("\n frame buffer: address=%jx, size=%jx",
664 (uintmax_t)efifb->fb_addr, (uintmax_t)efifb->fb_size);
665 printf("\n color mask: R=%08x, G=%08x, B=%08x\n",
666 efifb->fb_mask_red, efifb->fb_mask_green,
667 efifb->fb_mask_blue);
668 }
669 }
670
671 static bool
efi_resolution_compare(struct named_resolution * res,const char * cmp)672 efi_resolution_compare(struct named_resolution *res, const char *cmp)
673 {
674
675 if (strcasecmp(res->name, cmp) == 0)
676 return (true);
677 if (res->alias != NULL && strcasecmp(res->alias, cmp) == 0)
678 return (true);
679 return (false);
680 }
681
682
683 static void
efi_get_max_resolution(int * width,int * height)684 efi_get_max_resolution(int *width, int *height)
685 {
686 struct named_resolution *res;
687 char *maxres;
688 char *height_start, *width_start;
689 int idx;
690
691 *width = *height = 0;
692 maxres = getenv("efi_max_resolution");
693 /* No max_resolution set? Bail out; choose highest resolution */
694 if (maxres == NULL)
695 return;
696 /* See if it matches one of our known resolutions */
697 for (idx = 0; idx < nitems(resolutions); ++idx) {
698 res = &resolutions[idx];
699 if (efi_resolution_compare(res, maxres)) {
700 *width = res->width;
701 *height = res->height;
702 return;
703 }
704 }
705 /* Not a known resolution, try to parse it; make a copy we can modify */
706 maxres = strdup(maxres);
707 if (maxres == NULL)
708 return;
709 height_start = strchr(maxres, 'x');
710 if (height_start == NULL) {
711 free(maxres);
712 return;
713 }
714 width_start = maxres;
715 *height_start++ = 0;
716 /* Errors from this will effectively mean "no max" */
717 *width = (int)strtol(width_start, NULL, 0);
718 *height = (int)strtol(height_start, NULL, 0);
719 free(maxres);
720 }
721
722 static int
gop_autoresize(void)723 gop_autoresize(void)
724 {
725 struct efi_fb efifb;
726 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
727 EFI_STATUS status;
728 UINTN infosz;
729 UINT32 best_mode, currdim, maxdim, mode;
730 int height, max_height, max_width, width;
731
732 best_mode = maxdim = 0;
733 efi_get_max_resolution(&max_width, &max_height);
734 for (mode = 0; mode < gop->Mode->MaxMode; mode++) {
735 status = gop->QueryMode(gop, mode, &infosz, &info);
736 if (EFI_ERROR(status))
737 continue;
738 efifb_from_gop(&efifb, gop->Mode, info);
739 width = info->HorizontalResolution;
740 height = info->VerticalResolution;
741 currdim = width * height;
742 if (currdim > maxdim) {
743 if ((max_width != 0 && width > max_width) ||
744 (max_height != 0 && height > max_height))
745 continue;
746 maxdim = currdim;
747 best_mode = mode;
748 }
749 }
750
751 if (maxdim != 0) {
752 status = gop->SetMode(gop, best_mode);
753 if (EFI_ERROR(status)) {
754 snprintf(command_errbuf, sizeof(command_errbuf),
755 "gop_autoresize: Unable to set mode to %u (error=%lu)",
756 mode, EFI_ERROR_CODE(status));
757 return (CMD_ERROR);
758 }
759 (void) cons_update_mode(true);
760 }
761 return (CMD_OK);
762 }
763
764 static int
text_autoresize()765 text_autoresize()
766 {
767 SIMPLE_TEXT_OUTPUT_INTERFACE *conout;
768 EFI_STATUS status;
769 UINTN i, max_dim, best_mode, cols, rows;
770
771 conout = ST->ConOut;
772 max_dim = best_mode = 0;
773 for (i = 0; i < conout->Mode->MaxMode; i++) {
774 status = conout->QueryMode(conout, i, &cols, &rows);
775 if (EFI_ERROR(status))
776 continue;
777 if (cols * rows > max_dim) {
778 max_dim = cols * rows;
779 best_mode = i;
780 }
781 }
782 if (max_dim > 0)
783 conout->SetMode(conout, best_mode);
784 (void) cons_update_mode(true);
785 return (CMD_OK);
786 }
787
788 static int
uga_autoresize(void)789 uga_autoresize(void)
790 {
791
792 return (text_autoresize());
793 }
794
795 COMMAND_SET(efi_autoresize, "efi-autoresizecons", "EFI Auto-resize Console", command_autoresize);
796
797 static int
command_autoresize(int argc,char * argv[])798 command_autoresize(int argc, char *argv[])
799 {
800 char *textmode;
801
802 textmode = getenv("hw.vga.textmode");
803 /* If it's set and non-zero, we'll select a console mode instead */
804 if (textmode != NULL && strcmp(textmode, "0") != 0)
805 return (text_autoresize());
806
807 if (gop != NULL)
808 return (gop_autoresize());
809
810 if (uga != NULL)
811 return (uga_autoresize());
812
813 snprintf(command_errbuf, sizeof(command_errbuf),
814 "%s: Neither Graphics Output Protocol nor Universal Graphics Adapter present",
815 argv[0]);
816
817 /*
818 * Default to text_autoresize if we have neither GOP or UGA. This won't
819 * give us the most ideal resolution, but it will at least leave us
820 * functional rather than failing the boot for an objectively bad
821 * reason.
822 */
823 return (text_autoresize());
824 }
825
826 COMMAND_SET(gop, "gop", "graphics output protocol", command_gop);
827
828 static int
command_gop(int argc,char * argv[])829 command_gop(int argc, char *argv[])
830 {
831 struct efi_fb efifb;
832 EFI_STATUS status;
833 u_int mode;
834
835 if (gop == NULL) {
836 snprintf(command_errbuf, sizeof(command_errbuf),
837 "%s: Graphics Output Protocol not present", argv[0]);
838 return (CMD_ERROR);
839 }
840
841 if (argc < 2)
842 goto usage;
843
844 if (!strcmp(argv[1], "set")) {
845 char *cp;
846
847 if (argc != 3)
848 goto usage;
849 mode = strtol(argv[2], &cp, 0);
850 if (cp[0] != '\0') {
851 sprintf(command_errbuf, "mode is an integer");
852 return (CMD_ERROR);
853 }
854 status = gop->SetMode(gop, mode);
855 if (EFI_ERROR(status)) {
856 snprintf(command_errbuf, sizeof(command_errbuf),
857 "%s: Unable to set mode to %u (error=%lu)",
858 argv[0], mode, EFI_ERROR_CODE(status));
859 return (CMD_ERROR);
860 }
861 (void) cons_update_mode(true);
862 } else if (strcmp(argv[1], "off") == 0) {
863 (void) cons_update_mode(false);
864 } else if (strcmp(argv[1], "get") == 0) {
865 edid_res_list_t res;
866
867 if (argc != 2)
868 goto usage;
869 TAILQ_INIT(&res);
870 efifb_from_gop(&efifb, gop->Mode, gop->Mode->Info);
871 if (efifb_get_edid(&res)) {
872 struct resolution *rp;
873
874 printf("EDID");
875 while ((rp = TAILQ_FIRST(&res)) != NULL) {
876 printf(" %dx%d", rp->width, rp->height);
877 TAILQ_REMOVE(&res, rp, next);
878 free(rp);
879 }
880 printf("\n");
881 } else {
882 printf("no EDID information\n");
883 }
884 print_efifb(gop->Mode->Mode, &efifb, 1);
885 printf("\n");
886 } else if (!strcmp(argv[1], "list")) {
887 EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *info;
888 UINTN infosz;
889
890 if (argc != 2)
891 goto usage;
892
893 pager_open();
894 for (mode = 0; mode < gop->Mode->MaxMode; mode++) {
895 status = gop->QueryMode(gop, mode, &infosz, &info);
896 if (EFI_ERROR(status))
897 continue;
898 efifb_from_gop(&efifb, gop->Mode, info);
899 print_efifb(mode, &efifb, 0);
900 if (pager_output("\n"))
901 break;
902 }
903 pager_close();
904 }
905 return (CMD_OK);
906
907 usage:
908 snprintf(command_errbuf, sizeof(command_errbuf),
909 "usage: %s [list | get | set <mode> | off]", argv[0]);
910 return (CMD_ERROR);
911 }
912
913 COMMAND_SET(uga, "uga", "universal graphics adapter", command_uga);
914
915 static int
command_uga(int argc,char * argv[])916 command_uga(int argc, char *argv[])
917 {
918 struct efi_fb efifb;
919
920 if (uga == NULL) {
921 snprintf(command_errbuf, sizeof(command_errbuf),
922 "%s: UGA Protocol not present", argv[0]);
923 return (CMD_ERROR);
924 }
925
926 if (argc != 1)
927 goto usage;
928
929 if (efifb_from_uga(&efifb) != CMD_OK) {
930 snprintf(command_errbuf, sizeof(command_errbuf),
931 "%s: Unable to get UGA information", argv[0]);
932 return (CMD_ERROR);
933 }
934
935 print_efifb(-1, &efifb, 1);
936 printf("\n");
937 return (CMD_OK);
938
939 usage:
940 snprintf(command_errbuf, sizeof(command_errbuf), "usage: %s", argv[0]);
941 return (CMD_ERROR);
942 }
943