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1// SPDX-License-Identifier: GPL-2.0
2/* -----------------------------------------------------------------------
3 *
4 * Copyright 2011 Intel Corporation; author Matt Fleming
5 *
6 * ----------------------------------------------------------------------- */
7
8#include <linux/bitops.h>
9#include <linux/ctype.h>
10#include <linux/efi.h>
11#include <linux/screen_info.h>
12#include <linux/string.h>
13#include <asm/efi.h>
14#include <asm/setup.h>
15
16#include "efistub.h"
17
18enum efi_cmdline_option {
19 EFI_CMDLINE_NONE,
20 EFI_CMDLINE_MODE_NUM,
21 EFI_CMDLINE_RES,
22 EFI_CMDLINE_AUTO,
23 EFI_CMDLINE_LIST
24};
25
26static struct {
27 enum efi_cmdline_option option;
28 union {
29 u32 mode;
30 struct {
31 u32 width, height;
32 int format;
33 u8 depth;
34 } res;
35 };
36} cmdline = { .option = EFI_CMDLINE_NONE };
37
38static bool parse_modenum(char *option, char **next)
39{
40 u32 m;
41
42 if (!strstarts(option, "mode="))
43 return false;
44 option += strlen("mode=");
45 m = simple_strtoull(option, &option, 0);
46 if (*option && *option++ != ',')
47 return false;
48 cmdline.option = EFI_CMDLINE_MODE_NUM;
49 cmdline.mode = m;
50
51 *next = option;
52 return true;
53}
54
55static bool parse_res(char *option, char **next)
56{
57 u32 w, h, d = 0;
58 int pf = -1;
59
60 if (!isdigit(*option))
61 return false;
62 w = simple_strtoull(option, &option, 10);
63 if (*option++ != 'x' || !isdigit(*option))
64 return false;
65 h = simple_strtoull(option, &option, 10);
66 if (*option == '-') {
67 option++;
68 if (strstarts(option, "rgb")) {
69 option += strlen("rgb");
70 pf = PIXEL_RGB_RESERVED_8BIT_PER_COLOR;
71 } else if (strstarts(option, "bgr")) {
72 option += strlen("bgr");
73 pf = PIXEL_BGR_RESERVED_8BIT_PER_COLOR;
74 } else if (isdigit(*option))
75 d = simple_strtoull(option, &option, 10);
76 else
77 return false;
78 }
79 if (*option && *option++ != ',')
80 return false;
81 cmdline.option = EFI_CMDLINE_RES;
82 cmdline.res.width = w;
83 cmdline.res.height = h;
84 cmdline.res.format = pf;
85 cmdline.res.depth = d;
86
87 *next = option;
88 return true;
89}
90
91static bool parse_auto(char *option, char **next)
92{
93 if (!strstarts(option, "auto"))
94 return false;
95 option += strlen("auto");
96 if (*option && *option++ != ',')
97 return false;
98 cmdline.option = EFI_CMDLINE_AUTO;
99
100 *next = option;
101 return true;
102}
103
104static bool parse_list(char *option, char **next)
105{
106 if (!strstarts(option, "list"))
107 return false;
108 option += strlen("list");
109 if (*option && *option++ != ',')
110 return false;
111 cmdline.option = EFI_CMDLINE_LIST;
112
113 *next = option;
114 return true;
115}
116
117void efi_parse_option_graphics(char *option)
118{
119 while (*option) {
120 if (parse_modenum(option, &option))
121 continue;
122 if (parse_res(option, &option))
123 continue;
124 if (parse_auto(option, &option))
125 continue;
126 if (parse_list(option, &option))
127 continue;
128
129 while (*option && *option++ != ',')
130 ;
131 }
132}
133
134static u32 choose_mode_modenum(efi_graphics_output_protocol_t *gop)
135{
136 efi_status_t status;
137
138 efi_graphics_output_protocol_mode_t *mode;
139 efi_graphics_output_mode_info_t *info;
140 unsigned long info_size;
141
142 u32 max_mode, cur_mode;
143 int pf;
144
145 mode = efi_table_attr(gop, mode);
146
147 cur_mode = efi_table_attr(mode, mode);
148 if (cmdline.mode == cur_mode)
149 return cur_mode;
150
151 max_mode = efi_table_attr(mode, max_mode);
152 if (cmdline.mode >= max_mode) {
153 efi_err("Requested mode is invalid\n");
154 return cur_mode;
155 }
156
157 status = efi_call_proto(gop, query_mode, cmdline.mode,
158 &info_size, &info);
159 if (status != EFI_SUCCESS) {
160 efi_err("Couldn't get mode information\n");
161 return cur_mode;
162 }
163
164 pf = info->pixel_format;
165
166 efi_bs_call(free_pool, info);
167
168 if (pf == PIXEL_BLT_ONLY || pf >= PIXEL_FORMAT_MAX) {
169 efi_err("Invalid PixelFormat\n");
170 return cur_mode;
171 }
172
173 return cmdline.mode;
174}
175
176static u8 pixel_bpp(int pixel_format, efi_pixel_bitmask_t pixel_info)
177{
178 if (pixel_format == PIXEL_BIT_MASK) {
179 u32 mask = pixel_info.red_mask | pixel_info.green_mask |
180 pixel_info.blue_mask | pixel_info.reserved_mask;
181 if (!mask)
182 return 0;
183 return __fls(mask) - __ffs(mask) + 1;
184 } else
185 return 32;
186}
187
188static u32 choose_mode_res(efi_graphics_output_protocol_t *gop)
189{
190 efi_status_t status;
191
192 efi_graphics_output_protocol_mode_t *mode;
193 efi_graphics_output_mode_info_t *info;
194 unsigned long info_size;
195
196 u32 max_mode, cur_mode;
197 int pf;
198 efi_pixel_bitmask_t pi;
199 u32 m, w, h;
200
201 mode = efi_table_attr(gop, mode);
202
203 cur_mode = efi_table_attr(mode, mode);
204 info = efi_table_attr(mode, info);
205 pf = info->pixel_format;
206 pi = info->pixel_information;
207 w = info->horizontal_resolution;
208 h = info->vertical_resolution;
209
210 if (w == cmdline.res.width && h == cmdline.res.height &&
211 (cmdline.res.format < 0 || cmdline.res.format == pf) &&
212 (!cmdline.res.depth || cmdline.res.depth == pixel_bpp(pf, pi)))
213 return cur_mode;
214
215 max_mode = efi_table_attr(mode, max_mode);
216
217 for (m = 0; m < max_mode; m++) {
218 if (m == cur_mode)
219 continue;
220
221 status = efi_call_proto(gop, query_mode, m,
222 &info_size, &info);
223 if (status != EFI_SUCCESS)
224 continue;
225
226 pf = info->pixel_format;
227 pi = info->pixel_information;
228 w = info->horizontal_resolution;
229 h = info->vertical_resolution;
230
231 efi_bs_call(free_pool, info);
232
233 if (pf == PIXEL_BLT_ONLY || pf >= PIXEL_FORMAT_MAX)
234 continue;
235 if (w == cmdline.res.width && h == cmdline.res.height &&
236 (cmdline.res.format < 0 || cmdline.res.format == pf) &&
237 (!cmdline.res.depth || cmdline.res.depth == pixel_bpp(pf, pi)))
238 return m;
239 }
240
241 efi_err("Couldn't find requested mode\n");
242
243 return cur_mode;
244}
245
246static u32 choose_mode_auto(efi_graphics_output_protocol_t *gop)
247{
248 efi_status_t status;
249
250 efi_graphics_output_protocol_mode_t *mode;
251 efi_graphics_output_mode_info_t *info;
252 unsigned long info_size;
253
254 u32 max_mode, cur_mode, best_mode, area;
255 u8 depth;
256 int pf;
257 efi_pixel_bitmask_t pi;
258 u32 m, w, h, a;
259 u8 d;
260
261 mode = efi_table_attr(gop, mode);
262
263 cur_mode = efi_table_attr(mode, mode);
264 max_mode = efi_table_attr(mode, max_mode);
265
266 info = efi_table_attr(mode, info);
267
268 pf = info->pixel_format;
269 pi = info->pixel_information;
270 w = info->horizontal_resolution;
271 h = info->vertical_resolution;
272
273 best_mode = cur_mode;
274 area = w * h;
275 depth = pixel_bpp(pf, pi);
276
277 for (m = 0; m < max_mode; m++) {
278 if (m == cur_mode)
279 continue;
280
281 status = efi_call_proto(gop, query_mode, m,
282 &info_size, &info);
283 if (status != EFI_SUCCESS)
284 continue;
285
286 pf = info->pixel_format;
287 pi = info->pixel_information;
288 w = info->horizontal_resolution;
289 h = info->vertical_resolution;
290
291 efi_bs_call(free_pool, info);
292
293 if (pf == PIXEL_BLT_ONLY || pf >= PIXEL_FORMAT_MAX)
294 continue;
295 a = w * h;
296 if (a < area)
297 continue;
298 d = pixel_bpp(pf, pi);
299 if (a > area || d > depth) {
300 best_mode = m;
301 area = a;
302 depth = d;
303 }
304 }
305
306 return best_mode;
307}
308
309static u32 choose_mode_list(efi_graphics_output_protocol_t *gop)
310{
311 efi_status_t status;
312
313 efi_graphics_output_protocol_mode_t *mode;
314 efi_graphics_output_mode_info_t *info;
315 unsigned long info_size;
316
317 u32 max_mode, cur_mode;
318 int pf;
319 efi_pixel_bitmask_t pi;
320 u32 m, w, h;
321 u8 d;
322 const char *dstr;
323 bool valid;
324 efi_input_key_t key;
325
326 mode = efi_table_attr(gop, mode);
327
328 cur_mode = efi_table_attr(mode, mode);
329 max_mode = efi_table_attr(mode, max_mode);
330
331 efi_printk("Available graphics modes are 0-%u\n", max_mode-1);
332 efi_puts(" * = current mode\n"
333 " - = unusable mode\n");
334 for (m = 0; m < max_mode; m++) {
335 status = efi_call_proto(gop, query_mode, m,
336 &info_size, &info);
337 if (status != EFI_SUCCESS)
338 continue;
339
340 pf = info->pixel_format;
341 pi = info->pixel_information;
342 w = info->horizontal_resolution;
343 h = info->vertical_resolution;
344
345 efi_bs_call(free_pool, info);
346
347 valid = !(pf == PIXEL_BLT_ONLY || pf >= PIXEL_FORMAT_MAX);
348 d = 0;
349 switch (pf) {
350 case PIXEL_RGB_RESERVED_8BIT_PER_COLOR:
351 dstr = "rgb";
352 break;
353 case PIXEL_BGR_RESERVED_8BIT_PER_COLOR:
354 dstr = "bgr";
355 break;
356 case PIXEL_BIT_MASK:
357 dstr = "";
358 d = pixel_bpp(pf, pi);
359 break;
360 case PIXEL_BLT_ONLY:
361 dstr = "blt";
362 break;
363 default:
364 dstr = "xxx";
365 break;
366 }
367
368 efi_printk("Mode %3u %c%c: Resolution %ux%u-%s%.0hhu\n",
369 m,
370 m == cur_mode ? '*' : ' ',
371 !valid ? '-' : ' ',
372 w, h, dstr, d);
373 }
374
375 efi_puts("\nPress any key to continue (or wait 10 seconds)\n");
376 status = efi_wait_for_key(10 * EFI_USEC_PER_SEC, &key);
377 if (status != EFI_SUCCESS && status != EFI_TIMEOUT) {
378 efi_err("Unable to read key, continuing in 10 seconds\n");
379 efi_bs_call(stall, 10 * EFI_USEC_PER_SEC);
380 }
381
382 return cur_mode;
383}
384
385static void set_mode(efi_graphics_output_protocol_t *gop)
386{
387 efi_graphics_output_protocol_mode_t *mode;
388 u32 cur_mode, new_mode;
389
390 switch (cmdline.option) {
391 case EFI_CMDLINE_MODE_NUM:
392 new_mode = choose_mode_modenum(gop);
393 break;
394 case EFI_CMDLINE_RES:
395 new_mode = choose_mode_res(gop);
396 break;
397 case EFI_CMDLINE_AUTO:
398 new_mode = choose_mode_auto(gop);
399 break;
400 case EFI_CMDLINE_LIST:
401 new_mode = choose_mode_list(gop);
402 break;
403 default:
404 return;
405 }
406
407 mode = efi_table_attr(gop, mode);
408 cur_mode = efi_table_attr(mode, mode);
409
410 if (new_mode == cur_mode)
411 return;
412
413 if (efi_call_proto(gop, set_mode, new_mode) != EFI_SUCCESS)
414 efi_err("Failed to set requested mode\n");
415}
416
417static void find_bits(u32 mask, u8 *pos, u8 *size)
418{
419 if (!mask) {
420 *pos = *size = 0;
421 return;
422 }
423
424 /* UEFI spec guarantees that the set bits are contiguous */
425 *pos = __ffs(mask);
426 *size = __fls(mask) - *pos + 1;
427}
428
429static void
430setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
431 efi_pixel_bitmask_t pixel_info, int pixel_format)
432{
433 if (pixel_format == PIXEL_BIT_MASK) {
434 find_bits(pixel_info.red_mask,
435 &si->red_pos, &si->red_size);
436 find_bits(pixel_info.green_mask,
437 &si->green_pos, &si->green_size);
438 find_bits(pixel_info.blue_mask,
439 &si->blue_pos, &si->blue_size);
440 find_bits(pixel_info.reserved_mask,
441 &si->rsvd_pos, &si->rsvd_size);
442 si->lfb_depth = si->red_size + si->green_size +
443 si->blue_size + si->rsvd_size;
444 si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
445 } else {
446 if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
447 si->red_pos = 0;
448 si->blue_pos = 16;
449 } else /* PIXEL_BGR_RESERVED_8BIT_PER_COLOR */ {
450 si->blue_pos = 0;
451 si->red_pos = 16;
452 }
453
454 si->green_pos = 8;
455 si->rsvd_pos = 24;
456 si->red_size = si->green_size =
457 si->blue_size = si->rsvd_size = 8;
458
459 si->lfb_depth = 32;
460 si->lfb_linelength = pixels_per_scan_line * 4;
461 }
462}
463
464static efi_graphics_output_protocol_t *
465find_gop(efi_guid_t *proto, unsigned long size, void **handles)
466{
467 efi_graphics_output_protocol_t *first_gop;
468 efi_handle_t h;
469 int i;
470
471 first_gop = NULL;
472
473 for_each_efi_handle(h, handles, size, i) {
474 efi_status_t status;
475
476 efi_graphics_output_protocol_t *gop;
477 efi_graphics_output_protocol_mode_t *mode;
478 efi_graphics_output_mode_info_t *info;
479
480 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
481 void *dummy = NULL;
482
483 status = efi_bs_call(handle_protocol, h, proto, (void **)&gop);
484 if (status != EFI_SUCCESS)
485 continue;
486
487 mode = efi_table_attr(gop, mode);
488 info = efi_table_attr(mode, info);
489 if (info->pixel_format == PIXEL_BLT_ONLY ||
490 info->pixel_format >= PIXEL_FORMAT_MAX)
491 continue;
492
493 /*
494 * Systems that use the UEFI Console Splitter may
495 * provide multiple GOP devices, not all of which are
496 * backed by real hardware. The workaround is to search
497 * for a GOP implementing the ConOut protocol, and if
498 * one isn't found, to just fall back to the first GOP.
499 *
500 * Once we've found a GOP supporting ConOut,
501 * don't bother looking any further.
502 */
503 status = efi_bs_call(handle_protocol, h, &conout_proto, &dummy);
504 if (status == EFI_SUCCESS)
505 return gop;
506
507 if (!first_gop)
508 first_gop = gop;
509 }
510
511 return first_gop;
512}
513
514static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
515 unsigned long size, void **handles)
516{
517 efi_graphics_output_protocol_t *gop;
518 efi_graphics_output_protocol_mode_t *mode;
519 efi_graphics_output_mode_info_t *info;
520
521 gop = find_gop(proto, size, handles);
522
523 /* Did we find any GOPs? */
524 if (!gop)
525 return EFI_NOT_FOUND;
526
527 /* Change mode if requested */
528 set_mode(gop);
529
530 /* EFI framebuffer */
531 mode = efi_table_attr(gop, mode);
532 info = efi_table_attr(mode, info);
533
534 si->orig_video_isVGA = VIDEO_TYPE_EFI;
535
536 si->lfb_width = info->horizontal_resolution;
537 si->lfb_height = info->vertical_resolution;
538
539 efi_set_u64_split(efi_table_attr(mode, frame_buffer_base),
540 &si->lfb_base, &si->ext_lfb_base);
541 if (si->ext_lfb_base)
542 si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
543
544 si->pages = 1;
545
546 setup_pixel_info(si, info->pixels_per_scan_line,
547 info->pixel_information, info->pixel_format);
548
549 si->lfb_size = si->lfb_linelength * si->lfb_height;
550
551 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
552
553 return EFI_SUCCESS;
554}
555
556/*
557 * See if we have Graphics Output Protocol
558 */
559efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto,
560 unsigned long size)
561{
562 efi_status_t status;
563 void **gop_handle = NULL;
564
565 status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size,
566 (void **)&gop_handle);
567 if (status != EFI_SUCCESS)
568 return status;
569
570 status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, proto, NULL,
571 &size, gop_handle);
572 if (status != EFI_SUCCESS)
573 goto free_handle;
574
575 status = setup_gop(si, proto, size, gop_handle);
576
577free_handle:
578 efi_bs_call(free_pool, gop_handle);
579 return status;
580}
1/* -----------------------------------------------------------------------
2 *
3 * Copyright 2011 Intel Corporation; author Matt Fleming
4 *
5 * This file is part of the Linux kernel, and is made available under
6 * the terms of the GNU General Public License version 2.
7 *
8 * ----------------------------------------------------------------------- */
9
10#include <linux/efi.h>
11#include <linux/screen_info.h>
12#include <asm/efi.h>
13#include <asm/setup.h>
14
15static void find_bits(unsigned long mask, u8 *pos, u8 *size)
16{
17 u8 first, len;
18
19 first = 0;
20 len = 0;
21
22 if (mask) {
23 while (!(mask & 0x1)) {
24 mask = mask >> 1;
25 first++;
26 }
27
28 while (mask & 0x1) {
29 mask = mask >> 1;
30 len++;
31 }
32 }
33
34 *pos = first;
35 *size = len;
36}
37
38static void
39setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
40 struct efi_pixel_bitmask pixel_info, int pixel_format)
41{
42 if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
43 si->lfb_depth = 32;
44 si->lfb_linelength = pixels_per_scan_line * 4;
45 si->red_size = 8;
46 si->red_pos = 0;
47 si->green_size = 8;
48 si->green_pos = 8;
49 si->blue_size = 8;
50 si->blue_pos = 16;
51 si->rsvd_size = 8;
52 si->rsvd_pos = 24;
53 } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
54 si->lfb_depth = 32;
55 si->lfb_linelength = pixels_per_scan_line * 4;
56 si->red_size = 8;
57 si->red_pos = 16;
58 si->green_size = 8;
59 si->green_pos = 8;
60 si->blue_size = 8;
61 si->blue_pos = 0;
62 si->rsvd_size = 8;
63 si->rsvd_pos = 24;
64 } else if (pixel_format == PIXEL_BIT_MASK) {
65 find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
66 find_bits(pixel_info.green_mask, &si->green_pos,
67 &si->green_size);
68 find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
69 find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
70 &si->rsvd_size);
71 si->lfb_depth = si->red_size + si->green_size +
72 si->blue_size + si->rsvd_size;
73 si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
74 } else {
75 si->lfb_depth = 4;
76 si->lfb_linelength = si->lfb_width / 2;
77 si->red_size = 0;
78 si->red_pos = 0;
79 si->green_size = 0;
80 si->green_pos = 0;
81 si->blue_size = 0;
82 si->blue_pos = 0;
83 si->rsvd_size = 0;
84 si->rsvd_pos = 0;
85 }
86}
87
88static efi_status_t
89__gop_query32(efi_system_table_t *sys_table_arg,
90 struct efi_graphics_output_protocol_32 *gop32,
91 struct efi_graphics_output_mode_info **info,
92 unsigned long *size, u64 *fb_base)
93{
94 struct efi_graphics_output_protocol_mode_32 *mode;
95 efi_graphics_output_protocol_query_mode query_mode;
96 efi_status_t status;
97 unsigned long m;
98
99 m = gop32->mode;
100 mode = (struct efi_graphics_output_protocol_mode_32 *)m;
101 query_mode = (void *)(unsigned long)gop32->query_mode;
102
103 status = __efi_call_early(query_mode, (void *)gop32, mode->mode, size,
104 info);
105 if (status != EFI_SUCCESS)
106 return status;
107
108 *fb_base = mode->frame_buffer_base;
109 return status;
110}
111
112static efi_status_t
113setup_gop32(efi_system_table_t *sys_table_arg, struct screen_info *si,
114 efi_guid_t *proto, unsigned long size, void **gop_handle)
115{
116 struct efi_graphics_output_protocol_32 *gop32, *first_gop;
117 unsigned long nr_gops;
118 u16 width, height;
119 u32 pixels_per_scan_line;
120 u32 ext_lfb_base;
121 u64 fb_base;
122 struct efi_pixel_bitmask pixel_info;
123 int pixel_format;
124 efi_status_t status = EFI_NOT_FOUND;
125 u32 *handles = (u32 *)(unsigned long)gop_handle;
126 int i;
127
128 first_gop = NULL;
129 gop32 = NULL;
130
131 nr_gops = size / sizeof(u32);
132 for (i = 0; i < nr_gops; i++) {
133 struct efi_graphics_output_mode_info *info = NULL;
134 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
135 bool conout_found = false;
136 void *dummy = NULL;
137 efi_handle_t h = (efi_handle_t)(unsigned long)handles[i];
138 u64 current_fb_base;
139
140 status = efi_call_early(handle_protocol, h,
141 proto, (void **)&gop32);
142 if (status != EFI_SUCCESS)
143 continue;
144
145 status = efi_call_early(handle_protocol, h,
146 &conout_proto, &dummy);
147 if (status == EFI_SUCCESS)
148 conout_found = true;
149
150 status = __gop_query32(sys_table_arg, gop32, &info, &size,
151 ¤t_fb_base);
152 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
153 /*
154 * Systems that use the UEFI Console Splitter may
155 * provide multiple GOP devices, not all of which are
156 * backed by real hardware. The workaround is to search
157 * for a GOP implementing the ConOut protocol, and if
158 * one isn't found, to just fall back to the first GOP.
159 */
160 width = info->horizontal_resolution;
161 height = info->vertical_resolution;
162 pixel_format = info->pixel_format;
163 pixel_info = info->pixel_information;
164 pixels_per_scan_line = info->pixels_per_scan_line;
165 fb_base = current_fb_base;
166
167 /*
168 * Once we've found a GOP supporting ConOut,
169 * don't bother looking any further.
170 */
171 first_gop = gop32;
172 if (conout_found)
173 break;
174 }
175 }
176
177 /* Did we find any GOPs? */
178 if (!first_gop)
179 goto out;
180
181 /* EFI framebuffer */
182 si->orig_video_isVGA = VIDEO_TYPE_EFI;
183
184 si->lfb_width = width;
185 si->lfb_height = height;
186 si->lfb_base = fb_base;
187
188 ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
189 if (ext_lfb_base) {
190 si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
191 si->ext_lfb_base = ext_lfb_base;
192 }
193
194 si->pages = 1;
195
196 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
197
198 si->lfb_size = si->lfb_linelength * si->lfb_height;
199
200 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
201out:
202 return status;
203}
204
205static efi_status_t
206__gop_query64(efi_system_table_t *sys_table_arg,
207 struct efi_graphics_output_protocol_64 *gop64,
208 struct efi_graphics_output_mode_info **info,
209 unsigned long *size, u64 *fb_base)
210{
211 struct efi_graphics_output_protocol_mode_64 *mode;
212 efi_graphics_output_protocol_query_mode query_mode;
213 efi_status_t status;
214 unsigned long m;
215
216 m = gop64->mode;
217 mode = (struct efi_graphics_output_protocol_mode_64 *)m;
218 query_mode = (void *)(unsigned long)gop64->query_mode;
219
220 status = __efi_call_early(query_mode, (void *)gop64, mode->mode, size,
221 info);
222 if (status != EFI_SUCCESS)
223 return status;
224
225 *fb_base = mode->frame_buffer_base;
226 return status;
227}
228
229static efi_status_t
230setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,
231 efi_guid_t *proto, unsigned long size, void **gop_handle)
232{
233 struct efi_graphics_output_protocol_64 *gop64, *first_gop;
234 unsigned long nr_gops;
235 u16 width, height;
236 u32 pixels_per_scan_line;
237 u32 ext_lfb_base;
238 u64 fb_base;
239 struct efi_pixel_bitmask pixel_info;
240 int pixel_format;
241 efi_status_t status = EFI_NOT_FOUND;
242 u64 *handles = (u64 *)(unsigned long)gop_handle;
243 int i;
244
245 first_gop = NULL;
246 gop64 = NULL;
247
248 nr_gops = size / sizeof(u64);
249 for (i = 0; i < nr_gops; i++) {
250 struct efi_graphics_output_mode_info *info = NULL;
251 efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
252 bool conout_found = false;
253 void *dummy = NULL;
254 efi_handle_t h = (efi_handle_t)(unsigned long)handles[i];
255 u64 current_fb_base;
256
257 status = efi_call_early(handle_protocol, h,
258 proto, (void **)&gop64);
259 if (status != EFI_SUCCESS)
260 continue;
261
262 status = efi_call_early(handle_protocol, h,
263 &conout_proto, &dummy);
264 if (status == EFI_SUCCESS)
265 conout_found = true;
266
267 status = __gop_query64(sys_table_arg, gop64, &info, &size,
268 ¤t_fb_base);
269 if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
270 /*
271 * Systems that use the UEFI Console Splitter may
272 * provide multiple GOP devices, not all of which are
273 * backed by real hardware. The workaround is to search
274 * for a GOP implementing the ConOut protocol, and if
275 * one isn't found, to just fall back to the first GOP.
276 */
277 width = info->horizontal_resolution;
278 height = info->vertical_resolution;
279 pixel_format = info->pixel_format;
280 pixel_info = info->pixel_information;
281 pixels_per_scan_line = info->pixels_per_scan_line;
282 fb_base = current_fb_base;
283
284 /*
285 * Once we've found a GOP supporting ConOut,
286 * don't bother looking any further.
287 */
288 first_gop = gop64;
289 if (conout_found)
290 break;
291 }
292 }
293
294 /* Did we find any GOPs? */
295 if (!first_gop)
296 goto out;
297
298 /* EFI framebuffer */
299 si->orig_video_isVGA = VIDEO_TYPE_EFI;
300
301 si->lfb_width = width;
302 si->lfb_height = height;
303 si->lfb_base = fb_base;
304
305 ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
306 if (ext_lfb_base) {
307 si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
308 si->ext_lfb_base = ext_lfb_base;
309 }
310
311 si->pages = 1;
312
313 setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
314
315 si->lfb_size = si->lfb_linelength * si->lfb_height;
316
317 si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
318out:
319 return status;
320}
321
322/*
323 * See if we have Graphics Output Protocol
324 */
325efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
326 struct screen_info *si, efi_guid_t *proto,
327 unsigned long size)
328{
329 efi_status_t status;
330 void **gop_handle = NULL;
331
332 status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
333 size, (void **)&gop_handle);
334 if (status != EFI_SUCCESS)
335 return status;
336
337 status = efi_call_early(locate_handle,
338 EFI_LOCATE_BY_PROTOCOL,
339 proto, NULL, &size, gop_handle);
340 if (status != EFI_SUCCESS)
341 goto free_handle;
342
343 if (efi_is_64bit()) {
344 status = setup_gop64(sys_table_arg, si, proto, size,
345 gop_handle);
346 } else {
347 status = setup_gop32(sys_table_arg, si, proto, size,
348 gop_handle);
349 }
350
351free_handle:
352 efi_call_early(free_pool, gop_handle);
353 return status;
354}