xref: /openbmc/u-boot/lib/efi_loader/efi_gop.c (revision 93f33627)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  *  EFI application disk support
4  *
5  *  Copyright (c) 2016 Alexander Graf
6  */
7 
8 #include <common.h>
9 #include <dm.h>
10 #include <efi_loader.h>
11 #include <lcd.h>
12 #include <malloc.h>
13 #include <video.h>
14 
15 DECLARE_GLOBAL_DATA_PTR;
16 
17 static const efi_guid_t efi_gop_guid = EFI_GOP_GUID;
18 
19 struct efi_gop_obj {
20 	/* Generic EFI object parent class data */
21 	struct efi_object parent;
22 	/* EFI Interface callback struct for gop */
23 	struct efi_gop ops;
24 	/* The only mode we support */
25 	struct efi_gop_mode_info info;
26 	struct efi_gop_mode mode;
27 	/* Fields we only have acces to during init */
28 	u32 bpix;
29 	void *fb;
30 };
31 
32 static efi_status_t EFIAPI gop_query_mode(struct efi_gop *this, u32 mode_number,
33 					  efi_uintn_t *size_of_info,
34 					  struct efi_gop_mode_info **info)
35 {
36 	struct efi_gop_obj *gopobj;
37 
38 	EFI_ENTRY("%p, %x, %p, %p", this, mode_number, size_of_info, info);
39 
40 	gopobj = container_of(this, struct efi_gop_obj, ops);
41 	*size_of_info = sizeof(gopobj->info);
42 	*info = &gopobj->info;
43 
44 	return EFI_EXIT(EFI_SUCCESS);
45 }
46 
47 static efi_status_t EFIAPI gop_set_mode(struct efi_gop *this, u32 mode_number)
48 {
49 	EFI_ENTRY("%p, %x", this, mode_number);
50 
51 	if (mode_number != 0)
52 		return EFI_EXIT(EFI_INVALID_PARAMETER);
53 
54 	return EFI_EXIT(EFI_SUCCESS);
55 }
56 
57 static __always_inline struct efi_gop_pixel efi_vid16_to_blt_col(u16 vid)
58 {
59 	struct efi_gop_pixel blt = {
60 		.reserved = 0,
61 	};
62 
63 	blt.blue  = (vid & 0x1f) << 3;
64 	vid >>= 5;
65 	blt.green = (vid & 0x3f) << 2;
66 	vid >>= 6;
67 	blt.red   = (vid & 0x1f) << 3;
68 	return blt;
69 }
70 
71 static __always_inline u16 efi_blt_col_to_vid16(struct efi_gop_pixel *blt)
72 {
73 	return (u16)(blt->red   >> 3) << 11 |
74 	       (u16)(blt->green >> 2) <<  5 |
75 	       (u16)(blt->blue  >> 3);
76 }
77 
78 static __always_inline efi_status_t gop_blt_int(struct efi_gop *this,
79 						struct efi_gop_pixel *bufferp,
80 						u32 operation, efi_uintn_t sx,
81 						efi_uintn_t sy, efi_uintn_t dx,
82 						efi_uintn_t dy,
83 						efi_uintn_t width,
84 						efi_uintn_t height,
85 						efi_uintn_t delta,
86 						efi_uintn_t vid_bpp)
87 {
88 	struct efi_gop_obj *gopobj = container_of(this, struct efi_gop_obj, ops);
89 	efi_uintn_t i, j, linelen, slineoff = 0, dlineoff, swidth, dwidth;
90 	u32 *fb32 = gopobj->fb;
91 	u16 *fb16 = gopobj->fb;
92 	struct efi_gop_pixel *buffer = __builtin_assume_aligned(bufferp, 4);
93 
94 	if (delta) {
95 		/* Check for 4 byte alignment */
96 		if (delta & 3)
97 			return EFI_INVALID_PARAMETER;
98 		linelen = delta >> 2;
99 	} else {
100 		linelen = width;
101 	}
102 
103 	/* Check source rectangle */
104 	switch (operation) {
105 	case EFI_BLT_VIDEO_FILL:
106 		break;
107 	case EFI_BLT_BUFFER_TO_VIDEO:
108 		if (sx + width > linelen)
109 			return EFI_INVALID_PARAMETER;
110 		break;
111 	case EFI_BLT_VIDEO_TO_BLT_BUFFER:
112 	case EFI_BLT_VIDEO_TO_VIDEO:
113 		if (sx + width > gopobj->info.width ||
114 		    sy + height > gopobj->info.height)
115 			return EFI_INVALID_PARAMETER;
116 		break;
117 	default:
118 		return EFI_INVALID_PARAMETER;
119 	}
120 
121 	/* Check destination rectangle */
122 	switch (operation) {
123 	case EFI_BLT_VIDEO_FILL:
124 	case EFI_BLT_BUFFER_TO_VIDEO:
125 	case EFI_BLT_VIDEO_TO_VIDEO:
126 		if (dx + width > gopobj->info.width ||
127 		    dy + height > gopobj->info.height)
128 			return EFI_INVALID_PARAMETER;
129 		break;
130 	case EFI_BLT_VIDEO_TO_BLT_BUFFER:
131 		if (dx + width > linelen)
132 			return EFI_INVALID_PARAMETER;
133 		break;
134 	}
135 
136 	/* Calculate line width */
137 	switch (operation) {
138 	case EFI_BLT_BUFFER_TO_VIDEO:
139 		swidth = linelen;
140 		break;
141 	case EFI_BLT_VIDEO_TO_BLT_BUFFER:
142 	case EFI_BLT_VIDEO_TO_VIDEO:
143 		swidth = gopobj->info.width;
144 		if (!vid_bpp)
145 			return EFI_UNSUPPORTED;
146 		break;
147 	case EFI_BLT_VIDEO_FILL:
148 		swidth = 0;
149 		break;
150 	}
151 
152 	switch (operation) {
153 	case EFI_BLT_BUFFER_TO_VIDEO:
154 	case EFI_BLT_VIDEO_FILL:
155 	case EFI_BLT_VIDEO_TO_VIDEO:
156 		dwidth = gopobj->info.width;
157 		if (!vid_bpp)
158 			return EFI_UNSUPPORTED;
159 		break;
160 	case EFI_BLT_VIDEO_TO_BLT_BUFFER:
161 		dwidth = linelen;
162 		break;
163 	}
164 
165 	slineoff = swidth * sy;
166 	dlineoff = dwidth * dy;
167 	for (i = 0; i < height; i++) {
168 		for (j = 0; j < width; j++) {
169 			struct efi_gop_pixel pix;
170 
171 			/* Read source pixel */
172 			switch (operation) {
173 			case EFI_BLT_VIDEO_FILL:
174 				pix = *buffer;
175 				break;
176 			case EFI_BLT_BUFFER_TO_VIDEO:
177 				pix = buffer[slineoff + j + sx];
178 				break;
179 			case EFI_BLT_VIDEO_TO_BLT_BUFFER:
180 			case EFI_BLT_VIDEO_TO_VIDEO:
181 				if (vid_bpp == 32)
182 					pix = *(struct efi_gop_pixel *)&fb32[
183 						slineoff + j + sx];
184 				else
185 					pix = efi_vid16_to_blt_col(fb16[
186 						slineoff + j + sx]);
187 				break;
188 			}
189 
190 			/* Write destination pixel */
191 			switch (operation) {
192 			case EFI_BLT_VIDEO_TO_BLT_BUFFER:
193 				buffer[dlineoff + j + dx] = pix;
194 				break;
195 			case EFI_BLT_BUFFER_TO_VIDEO:
196 			case EFI_BLT_VIDEO_FILL:
197 			case EFI_BLT_VIDEO_TO_VIDEO:
198 				if (vid_bpp == 32)
199 					fb32[dlineoff + j + dx] = *(u32 *)&pix;
200 				else
201 					fb16[dlineoff + j + dx] =
202 						efi_blt_col_to_vid16(&pix);
203 				break;
204 			}
205 		}
206 		slineoff += swidth;
207 		dlineoff += dwidth;
208 	}
209 
210 	return EFI_SUCCESS;
211 }
212 
213 static efi_uintn_t gop_get_bpp(struct efi_gop *this)
214 {
215 	struct efi_gop_obj *gopobj = container_of(this, struct efi_gop_obj, ops);
216 	efi_uintn_t vid_bpp = 0;
217 
218 	switch (gopobj->bpix) {
219 #ifdef CONFIG_DM_VIDEO
220 	case VIDEO_BPP32:
221 #else
222 	case LCD_COLOR32:
223 #endif
224 		vid_bpp = 32;
225 		break;
226 #ifdef CONFIG_DM_VIDEO
227 	case VIDEO_BPP16:
228 #else
229 	case LCD_COLOR16:
230 #endif
231 		vid_bpp = 16;
232 		break;
233 	}
234 
235 	return vid_bpp;
236 }
237 
238 /*
239  * Gcc can't optimize our BLT function well, but we need to make sure that
240  * our 2-dimensional loop gets executed very quickly, otherwise the system
241  * will feel slow.
242  *
243  * By manually putting all obvious branch targets into functions which call
244  * our generic blt function with constants, the compiler can successfully
245  * optimize for speed.
246  */
247 static efi_status_t gop_blt_video_fill(struct efi_gop *this,
248 				       struct efi_gop_pixel *buffer,
249 				       u32 foo, efi_uintn_t sx,
250 				       efi_uintn_t sy, efi_uintn_t dx,
251 				       efi_uintn_t dy, efi_uintn_t width,
252 				       efi_uintn_t height, efi_uintn_t delta,
253 				       efi_uintn_t vid_bpp)
254 {
255 	return gop_blt_int(this, buffer, EFI_BLT_VIDEO_FILL, sx, sy, dx,
256 			   dy, width, height, delta, vid_bpp);
257 }
258 
259 static efi_status_t gop_blt_buf_to_vid16(struct efi_gop *this,
260 					 struct efi_gop_pixel *buffer,
261 					 u32 foo, efi_uintn_t sx,
262 					 efi_uintn_t sy, efi_uintn_t dx,
263 					 efi_uintn_t dy, efi_uintn_t width,
264 					 efi_uintn_t height, efi_uintn_t delta)
265 {
266 	return gop_blt_int(this, buffer, EFI_BLT_BUFFER_TO_VIDEO, sx, sy, dx,
267 			   dy, width, height, delta, 16);
268 }
269 
270 static efi_status_t gop_blt_buf_to_vid32(struct efi_gop *this,
271 					 struct efi_gop_pixel *buffer,
272 					 u32 foo, efi_uintn_t sx,
273 					 efi_uintn_t sy, efi_uintn_t dx,
274 					 efi_uintn_t dy, efi_uintn_t width,
275 					 efi_uintn_t height, efi_uintn_t delta)
276 {
277 	return gop_blt_int(this, buffer, EFI_BLT_BUFFER_TO_VIDEO, sx, sy, dx,
278 			   dy, width, height, delta, 32);
279 }
280 
281 static efi_status_t gop_blt_vid_to_vid(struct efi_gop *this,
282 				       struct efi_gop_pixel *buffer,
283 				       u32 foo, efi_uintn_t sx,
284 				       efi_uintn_t sy, efi_uintn_t dx,
285 				       efi_uintn_t dy, efi_uintn_t width,
286 				       efi_uintn_t height, efi_uintn_t delta,
287 				       efi_uintn_t vid_bpp)
288 {
289 	return gop_blt_int(this, buffer, EFI_BLT_VIDEO_TO_VIDEO, sx, sy, dx,
290 			   dy, width, height, delta, vid_bpp);
291 }
292 
293 static efi_status_t gop_blt_vid_to_buf(struct efi_gop *this,
294 				       struct efi_gop_pixel *buffer,
295 				       u32 foo, efi_uintn_t sx,
296 				       efi_uintn_t sy, efi_uintn_t dx,
297 				       efi_uintn_t dy, efi_uintn_t width,
298 				       efi_uintn_t height, efi_uintn_t delta,
299 				       efi_uintn_t vid_bpp)
300 {
301 	return gop_blt_int(this, buffer, EFI_BLT_VIDEO_TO_BLT_BUFFER, sx, sy,
302 			   dx, dy, width, height, delta, vid_bpp);
303 }
304 
305 /*
306  * Copy rectangle.
307  *
308  * This function implements the Blt service of the EFI_GRAPHICS_OUTPUT_PROTOCOL.
309  * See the Unified Extensible Firmware Interface (UEFI) specification for
310  * details.
311  *
312  * @this:	EFI_GRAPHICS_OUTPUT_PROTOCOL
313  * @buffer:	pixel buffer
314  * @sx:		source x-coordinate
315  * @sy:		source y-coordinate
316  * @dx:		destination x-coordinate
317  * @dy:		destination y-coordinate
318  * @width:	width of rectangle
319  * @height:	height of rectangle
320  * @delta:	length in bytes of a line in the pixel buffer (optional)
321  * @return:	status code
322  */
323 efi_status_t EFIAPI gop_blt(struct efi_gop *this, struct efi_gop_pixel *buffer,
324 			    u32 operation, efi_uintn_t sx,
325 			    efi_uintn_t sy, efi_uintn_t dx,
326 			    efi_uintn_t dy, efi_uintn_t width,
327 			    efi_uintn_t height, efi_uintn_t delta)
328 {
329 	efi_status_t ret = EFI_INVALID_PARAMETER;
330 	efi_uintn_t vid_bpp;
331 
332 	EFI_ENTRY("%p, %p, %u, %zu, %zu, %zu, %zu, %zu, %zu, %zu", this,
333 		  buffer, operation, sx, sy, dx, dy, width, height, delta);
334 
335 	vid_bpp = gop_get_bpp(this);
336 
337 	/* Allow for compiler optimization */
338 	switch (operation) {
339 	case EFI_BLT_VIDEO_FILL:
340 		ret = gop_blt_video_fill(this, buffer, operation, sx, sy, dx,
341 					 dy, width, height, delta, vid_bpp);
342 		break;
343 	case EFI_BLT_BUFFER_TO_VIDEO:
344 		/* This needs to be super-fast, so duplicate for 16/32bpp */
345 		if (vid_bpp == 32)
346 			ret = gop_blt_buf_to_vid32(this, buffer, operation, sx,
347 						   sy, dx, dy, width, height,
348 						   delta);
349 		else
350 			ret = gop_blt_buf_to_vid16(this, buffer, operation, sx,
351 						   sy, dx, dy, width, height,
352 						   delta);
353 		break;
354 	case EFI_BLT_VIDEO_TO_VIDEO:
355 		ret = gop_blt_vid_to_vid(this, buffer, operation, sx, sy, dx,
356 					 dy, width, height, delta, vid_bpp);
357 		break;
358 	case EFI_BLT_VIDEO_TO_BLT_BUFFER:
359 		ret = gop_blt_vid_to_buf(this, buffer, operation, sx, sy, dx,
360 					 dy, width, height, delta, vid_bpp);
361 		break;
362 	default:
363 		ret = EFI_UNSUPPORTED;
364 	}
365 
366 	if (ret != EFI_SUCCESS)
367 		return EFI_EXIT(ret);
368 
369 #ifdef CONFIG_DM_VIDEO
370 	video_sync_all();
371 #else
372 	lcd_sync();
373 #endif
374 
375 	return EFI_EXIT(EFI_SUCCESS);
376 }
377 
378 /*
379  * Install graphical output protocol.
380  *
381  * If no supported video device exists this is not considered as an
382  * error.
383  */
384 efi_status_t efi_gop_register(void)
385 {
386 	struct efi_gop_obj *gopobj;
387 	u32 bpix, col, row;
388 	u64 fb_base, fb_size;
389 	void *fb;
390 	efi_status_t ret;
391 
392 #ifdef CONFIG_DM_VIDEO
393 	struct udevice *vdev;
394 	struct video_priv *priv;
395 
396 	/* We only support a single video output device for now */
397 	if (uclass_first_device(UCLASS_VIDEO, &vdev) || !vdev) {
398 		debug("WARNING: No video device\n");
399 		return EFI_SUCCESS;
400 	}
401 
402 	priv = dev_get_uclass_priv(vdev);
403 	bpix = priv->bpix;
404 	col = video_get_xsize(vdev);
405 	row = video_get_ysize(vdev);
406 	fb_base = (uintptr_t)priv->fb;
407 	fb_size = priv->fb_size;
408 	fb = priv->fb;
409 #else
410 	int line_len;
411 
412 	bpix = panel_info.vl_bpix;
413 	col = panel_info.vl_col;
414 	row = panel_info.vl_row;
415 	fb_base = gd->fb_base;
416 	fb_size = lcd_get_size(&line_len);
417 	fb = (void*)gd->fb_base;
418 #endif
419 
420 	switch (bpix) {
421 #ifdef CONFIG_DM_VIDEO
422 	case VIDEO_BPP16:
423 	case VIDEO_BPP32:
424 #else
425 	case LCD_COLOR32:
426 	case LCD_COLOR16:
427 #endif
428 		break;
429 	default:
430 		/* So far, we only work in 16 or 32 bit mode */
431 		debug("WARNING: Unsupported video mode\n");
432 		return EFI_SUCCESS;
433 	}
434 
435 	gopobj = calloc(1, sizeof(*gopobj));
436 	if (!gopobj) {
437 		printf("ERROR: Out of memory\n");
438 		return EFI_OUT_OF_RESOURCES;
439 	}
440 
441 	/* Hook up to the device list */
442 	efi_add_handle(&gopobj->parent);
443 
444 	/* Fill in object data */
445 	ret = efi_add_protocol(gopobj->parent.handle, &efi_gop_guid,
446 			       &gopobj->ops);
447 	if (ret != EFI_SUCCESS) {
448 		printf("ERROR: Failure adding gop protocol\n");
449 		return ret;
450 	}
451 	gopobj->ops.query_mode = gop_query_mode;
452 	gopobj->ops.set_mode = gop_set_mode;
453 	gopobj->ops.blt = gop_blt;
454 	gopobj->ops.mode = &gopobj->mode;
455 
456 	gopobj->mode.max_mode = 1;
457 	gopobj->mode.info = &gopobj->info;
458 	gopobj->mode.info_size = sizeof(gopobj->info);
459 
460 #ifdef CONFIG_DM_VIDEO
461 	if (bpix == VIDEO_BPP32)
462 #else
463 	if (bpix == LCD_COLOR32)
464 #endif
465 	{
466 		/* With 32bit color space we can directly expose the fb */
467 		gopobj->mode.fb_base = fb_base;
468 		gopobj->mode.fb_size = fb_size;
469 	}
470 
471 	gopobj->info.version = 0;
472 	gopobj->info.width = col;
473 	gopobj->info.height = row;
474 	gopobj->info.pixel_format = EFI_GOT_BGRA8;
475 	gopobj->info.pixels_per_scanline = col;
476 
477 	gopobj->bpix = bpix;
478 	gopobj->fb = fb;
479 
480 	return EFI_SUCCESS;
481 }
482