summaryrefslogtreecommitdiff
path: root/lib/efi_loader/efi_gop.c
blob: c44a1cfc471b7642c7b27e482dedc0e8d3902132 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
// SPDX-License-Identifier: GPL-2.0+
/*
 *  EFI application disk support
 *
 *  Copyright (c) 2016 Alexander Graf
 */

#include <common.h>
#include <dm.h>
#include <efi_loader.h>
#include <lcd.h>
#include <malloc.h>
#include <video.h>

DECLARE_GLOBAL_DATA_PTR;

static const efi_guid_t efi_gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;

/**
 * struct efi_gop_obj - graphical output protocol object
 *
 * @header:	EFI object header
 * @ops:	graphical output protocol interface
 * @info:	graphical output mode information
 * @mode:	graphical output mode
 * @bpix:	bits per pixel
 * @fb:		frame buffer
 */
struct efi_gop_obj {
	struct efi_object header;
	struct efi_gop ops;
	struct efi_gop_mode_info info;
	struct efi_gop_mode mode;
	/* Fields we only have access to during init */
	u32 bpix;
	void *fb;
};

static efi_status_t EFIAPI gop_query_mode(struct efi_gop *this, u32 mode_number,
					  efi_uintn_t *size_of_info,
					  struct efi_gop_mode_info **info)
{
	struct efi_gop_obj *gopobj;
	efi_status_t ret = EFI_SUCCESS;

	EFI_ENTRY("%p, %x, %p, %p", this, mode_number, size_of_info, info);

	if (!this || !size_of_info || !info || mode_number) {
		ret = EFI_INVALID_PARAMETER;
		goto out;
	}

	gopobj = container_of(this, struct efi_gop_obj, ops);
	*size_of_info = sizeof(gopobj->info);
	*info = &gopobj->info;

out:
	return EFI_EXIT(ret);
}

static efi_status_t EFIAPI gop_set_mode(struct efi_gop *this, u32 mode_number)
{
	EFI_ENTRY("%p, %x", this, mode_number);

	if (mode_number != 0)
		return EFI_EXIT(EFI_INVALID_PARAMETER);

	return EFI_EXIT(EFI_SUCCESS);
}

static __always_inline struct efi_gop_pixel efi_vid16_to_blt_col(u16 vid)
{
	struct efi_gop_pixel blt = {
		.reserved = 0,
	};

	blt.blue  = (vid & 0x1f) << 3;
	vid >>= 5;
	blt.green = (vid & 0x3f) << 2;
	vid >>= 6;
	blt.red   = (vid & 0x1f) << 3;
	return blt;
}

static __always_inline u16 efi_blt_col_to_vid16(struct efi_gop_pixel *blt)
{
	return (u16)(blt->red   >> 3) << 11 |
	       (u16)(blt->green >> 2) <<  5 |
	       (u16)(blt->blue  >> 3);
}

static __always_inline efi_status_t gop_blt_int(struct efi_gop *this,
						struct efi_gop_pixel *bufferp,
						u32 operation, efi_uintn_t sx,
						efi_uintn_t sy, efi_uintn_t dx,
						efi_uintn_t dy,
						efi_uintn_t width,
						efi_uintn_t height,
						efi_uintn_t delta,
						efi_uintn_t vid_bpp)
{
	struct efi_gop_obj *gopobj = container_of(this, struct efi_gop_obj, ops);
	efi_uintn_t i, j, linelen, slineoff = 0, dlineoff, swidth, dwidth;
	u32 *fb32 = gopobj->fb;
	u16 *fb16 = gopobj->fb;
	struct efi_gop_pixel *buffer = __builtin_assume_aligned(bufferp, 4);

	if (delta) {
		/* Check for 4 byte alignment */
		if (delta & 3)
			return EFI_INVALID_PARAMETER;
		linelen = delta >> 2;
	} else {
		linelen = width;
	}

	/* Check source rectangle */
	switch (operation) {
	case EFI_BLT_VIDEO_FILL:
		break;
	case EFI_BLT_BUFFER_TO_VIDEO:
		if (sx + width > linelen)
			return EFI_INVALID_PARAMETER;
		break;
	case EFI_BLT_VIDEO_TO_BLT_BUFFER:
	case EFI_BLT_VIDEO_TO_VIDEO:
		if (sx + width > gopobj->info.width ||
		    sy + height > gopobj->info.height)
			return EFI_INVALID_PARAMETER;
		break;
	default:
		return EFI_INVALID_PARAMETER;
	}

	/* Check destination rectangle */
	switch (operation) {
	case EFI_BLT_VIDEO_FILL:
	case EFI_BLT_BUFFER_TO_VIDEO:
	case EFI_BLT_VIDEO_TO_VIDEO:
		if (dx + width > gopobj->info.width ||
		    dy + height > gopobj->info.height)
			return EFI_INVALID_PARAMETER;
		break;
	case EFI_BLT_VIDEO_TO_BLT_BUFFER:
		if (dx + width > linelen)
			return EFI_INVALID_PARAMETER;
		break;
	}

	/* Calculate line width */
	switch (operation) {
	case EFI_BLT_BUFFER_TO_VIDEO:
		swidth = linelen;
		break;
	case EFI_BLT_VIDEO_TO_BLT_BUFFER:
	case EFI_BLT_VIDEO_TO_VIDEO:
		swidth = gopobj->info.width;
		if (!vid_bpp)
			return EFI_UNSUPPORTED;
		break;
	case EFI_BLT_VIDEO_FILL:
		swidth = 0;
		break;
	}

	switch (operation) {
	case EFI_BLT_BUFFER_TO_VIDEO:
	case EFI_BLT_VIDEO_FILL:
	case EFI_BLT_VIDEO_TO_VIDEO:
		dwidth = gopobj->info.width;
		if (!vid_bpp)
			return EFI_UNSUPPORTED;
		break;
	case EFI_BLT_VIDEO_TO_BLT_BUFFER:
		dwidth = linelen;
		break;
	}

	slineoff = swidth * sy;
	dlineoff = dwidth * dy;
	for (i = 0; i < height; i++) {
		for (j = 0; j < width; j++) {
			struct efi_gop_pixel pix;

			/* Read source pixel */
			switch (operation) {
			case EFI_BLT_VIDEO_FILL:
				pix = *buffer;
				break;
			case EFI_BLT_BUFFER_TO_VIDEO:
				pix = buffer[slineoff + j + sx];
				break;
			case EFI_BLT_VIDEO_TO_BLT_BUFFER:
			case EFI_BLT_VIDEO_TO_VIDEO:
				if (vid_bpp == 32)
					pix = *(struct efi_gop_pixel *)&fb32[
						slineoff + j + sx];
				else
					pix = efi_vid16_to_blt_col(fb16[
						slineoff + j + sx]);
				break;
			}

			/* Write destination pixel */
			switch (operation) {
			case EFI_BLT_VIDEO_TO_BLT_BUFFER:
				buffer[dlineoff + j + dx] = pix;
				break;
			case EFI_BLT_BUFFER_TO_VIDEO:
			case EFI_BLT_VIDEO_FILL:
			case EFI_BLT_VIDEO_TO_VIDEO:
				if (vid_bpp == 32)
					fb32[dlineoff + j + dx] = *(u32 *)&pix;
				else
					fb16[dlineoff + j + dx] =
						efi_blt_col_to_vid16(&pix);
				break;
			}
		}
		slineoff += swidth;
		dlineoff += dwidth;
	}

	return EFI_SUCCESS;
}

static efi_uintn_t gop_get_bpp(struct efi_gop *this)
{
	struct efi_gop_obj *gopobj = container_of(this, struct efi_gop_obj, ops);
	efi_uintn_t vid_bpp = 0;

	switch (gopobj->bpix) {
#ifdef CONFIG_DM_VIDEO
	case VIDEO_BPP32:
#else
	case LCD_COLOR32:
#endif
		vid_bpp = 32;
		break;
#ifdef CONFIG_DM_VIDEO
	case VIDEO_BPP16:
#else
	case LCD_COLOR16:
#endif
		vid_bpp = 16;
		break;
	}

	return vid_bpp;
}

/*
 * GCC can't optimize our BLT function well, but we need to make sure that
 * our 2-dimensional loop gets executed very quickly, otherwise the system
 * will feel slow.
 *
 * By manually putting all obvious branch targets into functions which call
 * our generic BLT function with constants, the compiler can successfully
 * optimize for speed.
 */
static efi_status_t gop_blt_video_fill(struct efi_gop *this,
				       struct efi_gop_pixel *buffer,
				       u32 foo, efi_uintn_t sx,
				       efi_uintn_t sy, efi_uintn_t dx,
				       efi_uintn_t dy, efi_uintn_t width,
				       efi_uintn_t height, efi_uintn_t delta,
				       efi_uintn_t vid_bpp)
{
	return gop_blt_int(this, buffer, EFI_BLT_VIDEO_FILL, sx, sy, dx,
			   dy, width, height, delta, vid_bpp);
}

static efi_status_t gop_blt_buf_to_vid16(struct efi_gop *this,
					 struct efi_gop_pixel *buffer,
					 u32 foo, efi_uintn_t sx,
					 efi_uintn_t sy, efi_uintn_t dx,
					 efi_uintn_t dy, efi_uintn_t width,
					 efi_uintn_t height, efi_uintn_t delta)
{
	return gop_blt_int(this, buffer, EFI_BLT_BUFFER_TO_VIDEO, sx, sy, dx,
			   dy, width, height, delta, 16);
}

static efi_status_t gop_blt_buf_to_vid32(struct efi_gop *this,
					 struct efi_gop_pixel *buffer,
					 u32 foo, efi_uintn_t sx,
					 efi_uintn_t sy, efi_uintn_t dx,
					 efi_uintn_t dy, efi_uintn_t width,
					 efi_uintn_t height, efi_uintn_t delta)
{
	return gop_blt_int(this, buffer, EFI_BLT_BUFFER_TO_VIDEO, sx, sy, dx,
			   dy, width, height, delta, 32);
}

static efi_status_t gop_blt_vid_to_vid(struct efi_gop *this,
				       struct efi_gop_pixel *buffer,
				       u32 foo, efi_uintn_t sx,
				       efi_uintn_t sy, efi_uintn_t dx,
				       efi_uintn_t dy, efi_uintn_t width,
				       efi_uintn_t height, efi_uintn_t delta,
				       efi_uintn_t vid_bpp)
{
	return gop_blt_int(this, buffer, EFI_BLT_VIDEO_TO_VIDEO, sx, sy, dx,
			   dy, width, height, delta, vid_bpp);
}

static efi_status_t gop_blt_vid_to_buf(struct efi_gop *this,
				       struct efi_gop_pixel *buffer,
				       u32 foo, efi_uintn_t sx,
				       efi_uintn_t sy, efi_uintn_t dx,
				       efi_uintn_t dy, efi_uintn_t width,
				       efi_uintn_t height, efi_uintn_t delta,
				       efi_uintn_t vid_bpp)
{
	return gop_blt_int(this, buffer, EFI_BLT_VIDEO_TO_BLT_BUFFER, sx, sy,
			   dx, dy, width, height, delta, vid_bpp);
}

/*
 * Copy rectangle.
 *
 * This function implements the Blt service of the EFI_GRAPHICS_OUTPUT_PROTOCOL.
 * See the Unified Extensible Firmware Interface (UEFI) specification for
 * details.
 *
 * @this:	EFI_GRAPHICS_OUTPUT_PROTOCOL
 * @buffer:	pixel buffer
 * @sx:		source x-coordinate
 * @sy:		source y-coordinate
 * @dx:		destination x-coordinate
 * @dy:		destination y-coordinate
 * @width:	width of rectangle
 * @height:	height of rectangle
 * @delta:	length in bytes of a line in the pixel buffer (optional)
 * @return:	status code
 */
efi_status_t EFIAPI gop_blt(struct efi_gop *this, struct efi_gop_pixel *buffer,
			    u32 operation, efi_uintn_t sx,
			    efi_uintn_t sy, efi_uintn_t dx,
			    efi_uintn_t dy, efi_uintn_t width,
			    efi_uintn_t height, efi_uintn_t delta)
{
	efi_status_t ret = EFI_INVALID_PARAMETER;
	efi_uintn_t vid_bpp;

	EFI_ENTRY("%p, %p, %u, %zu, %zu, %zu, %zu, %zu, %zu, %zu", this,
		  buffer, operation, sx, sy, dx, dy, width, height, delta);

	vid_bpp = gop_get_bpp(this);

	/* Allow for compiler optimization */
	switch (operation) {
	case EFI_BLT_VIDEO_FILL:
		ret = gop_blt_video_fill(this, buffer, operation, sx, sy, dx,
					 dy, width, height, delta, vid_bpp);
		break;
	case EFI_BLT_BUFFER_TO_VIDEO:
		/* This needs to be super-fast, so duplicate for 16/32bpp */
		if (vid_bpp == 32)
			ret = gop_blt_buf_to_vid32(this, buffer, operation, sx,
						   sy, dx, dy, width, height,
						   delta);
		else
			ret = gop_blt_buf_to_vid16(this, buffer, operation, sx,
						   sy, dx, dy, width, height,
						   delta);
		break;
	case EFI_BLT_VIDEO_TO_VIDEO:
		ret = gop_blt_vid_to_vid(this, buffer, operation, sx, sy, dx,
					 dy, width, height, delta, vid_bpp);
		break;
	case EFI_BLT_VIDEO_TO_BLT_BUFFER:
		ret = gop_blt_vid_to_buf(this, buffer, operation, sx, sy, dx,
					 dy, width, height, delta, vid_bpp);
		break;
	default:
		ret = EFI_INVALID_PARAMETER;
	}

	if (ret != EFI_SUCCESS)
		return EFI_EXIT(ret);

#ifdef CONFIG_DM_VIDEO
	video_sync_all();
#else
	lcd_sync();
#endif

	return EFI_EXIT(EFI_SUCCESS);
}

/*
 * Install graphical output protocol.
 *
 * If no supported video device exists this is not considered as an
 * error.
 */
efi_status_t efi_gop_register(void)
{
	struct efi_gop_obj *gopobj;
	u32 bpix, col, row;
	u64 fb_base, fb_size;
	void *fb;
	efi_status_t ret;

#ifdef CONFIG_DM_VIDEO
	struct udevice *vdev;
	struct video_priv *priv;

	/* We only support a single video output device for now */
	if (uclass_first_device(UCLASS_VIDEO, &vdev) || !vdev) {
		debug("WARNING: No video device\n");
		return EFI_SUCCESS;
	}

	priv = dev_get_uclass_priv(vdev);
	bpix = priv->bpix;
	col = video_get_xsize(vdev);
	row = video_get_ysize(vdev);
	fb_base = (uintptr_t)priv->fb;
	fb_size = priv->fb_size;
	fb = priv->fb;
#else
	int line_len;

	bpix = panel_info.vl_bpix;
	col = panel_info.vl_col;
	row = panel_info.vl_row;
	fb_base = gd->fb_base;
	fb_size = lcd_get_size(&line_len);
	fb = (void*)gd->fb_base;
#endif

	switch (bpix) {
#ifdef CONFIG_DM_VIDEO
	case VIDEO_BPP16:
	case VIDEO_BPP32:
#else
	case LCD_COLOR32:
	case LCD_COLOR16:
#endif
		break;
	default:
		/* So far, we only work in 16 or 32 bit mode */
		debug("WARNING: Unsupported video mode\n");
		return EFI_SUCCESS;
	}

	gopobj = calloc(1, sizeof(*gopobj));
	if (!gopobj) {
		printf("ERROR: Out of memory\n");
		return EFI_OUT_OF_RESOURCES;
	}

	/* Hook up to the device list */
	efi_add_handle(&gopobj->header);

	/* Fill in object data */
	ret = efi_add_protocol(&gopobj->header, &efi_gop_guid,
			       &gopobj->ops);
	if (ret != EFI_SUCCESS) {
		printf("ERROR: Failure adding GOP protocol\n");
		return ret;
	}
	gopobj->ops.query_mode = gop_query_mode;
	gopobj->ops.set_mode = gop_set_mode;
	gopobj->ops.blt = gop_blt;
	gopobj->ops.mode = &gopobj->mode;

	gopobj->mode.max_mode = 1;
	gopobj->mode.info = &gopobj->info;
	gopobj->mode.info_size = sizeof(gopobj->info);

#ifdef CONFIG_DM_VIDEO
	if (bpix == VIDEO_BPP32)
#else
	if (bpix == LCD_COLOR32)
#endif
	{
		/*
		 * With 32bit color space we can directly expose the frame
		 * buffer
		 */
		gopobj->mode.fb_base = fb_base;
		gopobj->mode.fb_size = fb_size;
	}

	gopobj->info.version = 0;
	gopobj->info.width = col;
	gopobj->info.height = row;
	gopobj->info.pixel_format = EFI_GOT_BGRA8;
	gopobj->info.pixels_per_scanline = col;

	gopobj->bpix = bpix;
	gopobj->fb = fb;

	return EFI_SUCCESS;
}