1 // SPDX-License-Identifier: GPL-2.0 or MIT
13 #include <linux/iosys-map.h>
67  * It's intended for end-user, so have minimal technical/debug information.
84 #define PANIC_LINE(s) {.len = sizeof(s) - 1, .txt = s}
97 	PANIC_LINE("     .--.        _"),
117 	if (!logo || logo->type != LINUX_LOGO_MONO)  in drm_panic_setup_logo()
121 	logo_data = kmemdup(logo->data,  in drm_panic_setup_logo()
122 			    size_mul(DIV_ROUND_UP(logo->width, BITS_PER_BYTE), logo->height),  in drm_panic_setup_logo()
125 		return -ENOMEM;  in drm_panic_setup_logo()
130 		return -ENOMEM;  in drm_panic_setup_logo()
133 	logo_dup->data = logo_data;  in drm_panic_setup_logo()
151 	unsigned int y, x;  in drm_panic_blit_pixel()  local
153 	for (y = 0; y < drm_rect_height(clip); y++)  in drm_panic_blit_pixel()
155 			if (drm_draw_is_pixel_fg(sbuf8, spitch, x / scale, y / scale))  in drm_panic_blit_pixel()
156 				sb->set_pixel(sb, clip->x1 + x, clip->y1 + y, fg_color);  in drm_panic_blit_pixel()
159 static void drm_panic_write_pixel16(void *vaddr, unsigned int offset, u16 color)  in drm_panic_write_pixel16()  argument
161 	u16 *p = vaddr + offset;  in drm_panic_write_pixel16()
166 static void drm_panic_write_pixel24(void *vaddr, unsigned int offset, u32 color)  in drm_panic_write_pixel24()  argument
168 	u8 *p = vaddr + offset;  in drm_panic_write_pixel24()
181 					  unsigned int offset, u32 color)  in drm_panic_write_pixel24_xpage()  argument
184 	u8 *p = vaddr + offset;  in drm_panic_write_pixel24_xpage()
191 	if (offset == PAGE_SIZE - 1)  in drm_panic_write_pixel24_xpage()
197 	if (offset == PAGE_SIZE - 2)  in drm_panic_write_pixel24_xpage()
204 static void drm_panic_write_pixel32(void *vaddr, unsigned int offset, u32 color)  in drm_panic_write_pixel32()  argument
206 	u32 *p = vaddr + offset;  in drm_panic_write_pixel32()
211 static void drm_panic_write_pixel(void *vaddr, unsigned int offset, u32 color, unsigned int cpp)  in drm_panic_write_pixel()  argument
215 		drm_panic_write_pixel16(vaddr, offset, color);  in drm_panic_write_pixel()
218 		drm_panic_write_pixel24(vaddr, offset, color);  in drm_panic_write_pixel()
221 		drm_panic_write_pixel32(vaddr, offset, color);  in drm_panic_write_pixel()
238 	unsigned int y, x;  in drm_panic_blit_page()  local
244 	for (y = 0; y < height; y++) {  in drm_panic_blit_page()
246 			if (drm_draw_is_pixel_fg(sbuf8, spitch, x / scale, y / scale)) {  in drm_panic_blit_page()
248 				unsigned int offset;  in drm_panic_blit_page()  local
250 				offset = (y + clip->y1) * dpitch + (x + clip->x1) * cpp;  in drm_panic_blit_page()
251 				new_page = offset >> PAGE_SHIFT;  in drm_panic_blit_page()
252 				offset = offset % PAGE_SIZE;  in drm_panic_blit_page()
265 				if (cpp == 3 && offset + 3 > PAGE_SIZE)  in drm_panic_blit_page()
267 								      offset, fg32);  in drm_panic_blit_page()
269 					drm_panic_write_pixel(vaddr, offset, fg32, cpp);  in drm_panic_blit_page()
278  * drm_panic_blit - convert a monochrome image to a linear framebuffer
297 	if (sb->set_pixel)  in drm_panic_blit()
300 	if (sb->pages)  in drm_panic_blit()
301 		return drm_panic_blit_page(sb->pages, sb->pitch[0], sb->format->cpp[0],  in drm_panic_blit()
304 	map = sb->map[0];  in drm_panic_blit()
305 	iosys_map_incr(&map, clip->y1 * sb->pitch[0] + clip->x1 * sb->format->cpp[0]);  in drm_panic_blit()
307 	switch (sb->format->cpp[0]) {  in drm_panic_blit()
309 		drm_draw_blit16(&map, sb->pitch[0], sbuf8, spitch,  in drm_panic_blit()
313 		drm_draw_blit24(&map, sb->pitch[0], sbuf8, spitch,  in drm_panic_blit()
317 		drm_draw_blit32(&map, sb->pitch[0], sbuf8, spitch,  in drm_panic_blit()
321 		WARN_ONCE(1, "Can't blit with pixel width %d\n", sb->format->cpp[0]);  in drm_panic_blit()
329 	unsigned int y, x;  in drm_panic_fill_pixel()  local
331 	for (y = 0; y < drm_rect_height(clip); y++)  in drm_panic_fill_pixel()
333 			sb->set_pixel(sb, clip->x1 + x, clip->y1 + y, color);  in drm_panic_fill_pixel()
340 	unsigned int y, x;  in drm_panic_fill_page()  local
344 	for (y = clip->y1; y < clip->y2; y++) {  in drm_panic_fill_page()
345 		for (x = clip->x1; x < clip->x2; x++) {  in drm_panic_fill_page()
347 			unsigned int offset;  in drm_panic_fill_page()  local
349 			offset = y * dpitch + x * cpp;  in drm_panic_fill_page()
350 			new_page = offset >> PAGE_SHIFT;  in drm_panic_fill_page()
351 			offset = offset % PAGE_SIZE;  in drm_panic_fill_page()
362 			if (cpp == 3 && offset + 3 > PAGE_SIZE)  in drm_panic_fill_page()
364 							      offset, color);  in drm_panic_fill_page()
366 				drm_panic_write_pixel(vaddr, offset, color, cpp);  in drm_panic_fill_page()
374  * drm_panic_fill - Fill a rectangle with a color
386 	if (sb->set_pixel)  in drm_panic_fill()
389 	if (sb->pages)  in drm_panic_fill()
390 		return drm_panic_fill_page(sb->pages, sb->pitch[0], sb->format->cpp[0],  in drm_panic_fill()
393 	map = sb->map[0];  in drm_panic_fill()
394 	iosys_map_incr(&map, clip->y1 * sb->pitch[0] + clip->x1 * sb->format->cpp[0]);  in drm_panic_fill()
396 	switch (sb->format->cpp[0]) {  in drm_panic_fill()
398 		drm_draw_fill16(&map, sb->pitch[0], drm_rect_height(clip),  in drm_panic_fill()
402 		drm_draw_fill24(&map, sb->pitch[0], drm_rect_height(clip),  in drm_panic_fill()
406 		drm_draw_fill32(&map, sb->pitch[0], drm_rect_height(clip),  in drm_panic_fill()
410 		WARN_ONCE(1, "Can't fill with pixel width %d\n", sb->format->cpp[0]);  in drm_panic_fill()
437 	size_t font_pitch = DIV_ROUND_UP(font->width, 8);  in draw_txt_rectangle()
440 	msg_lines = min(msg_lines,  drm_rect_height(clip) / font->height);  in draw_txt_rectangle()
442 		size_t line_len = min(msg[i].len, drm_rect_width(clip) / font->width);  in draw_txt_rectangle()
444 		rec.y1 = clip->y1 +  i * font->height;  in draw_txt_rectangle()
445 		rec.y2 = rec.y1 + font->height;  in draw_txt_rectangle()
446 		rec.x1 = clip->x1;  in draw_txt_rectangle()
449 			rec.x1 += (drm_rect_width(clip) - (line_len * font->width)) / 2;  in draw_txt_rectangle()
453 			rec.x2 = rec.x1 + font->width;  in draw_txt_rectangle()
455 			rec.x1 += font->width;  in draw_txt_rectangle()
463 		drm_rect_init(rect, 0, 0, logo_mono->width, logo_mono->height);  in drm_panic_logo_rect()
465 		int logo_width = get_max_line_len(logo_ascii, logo_ascii_lines) * font->width;  in drm_panic_logo_rect()
467 		drm_rect_init(rect, 0, 0, logo_width, logo_ascii_lines * font->height);  in drm_panic_logo_rect()
474 	if (rect->x2 > sb->width || rect->y2 > sb->height)  in drm_panic_logo_draw()
478 		drm_panic_blit(sb, rect, logo_mono->data,  in drm_panic_logo_draw()
488 						    sb->format->format);  in draw_panic_static_user()
490 						    sb->format->format);  in draw_panic_static_user()
491 	const struct font_desc *font = get_default_font(sb->width, sb->height, NULL, NULL);  in draw_panic_static_user()
498 	r_screen = DRM_RECT_INIT(0, 0, sb->width, sb->height);  in draw_panic_static_user()
501 	msg_width = min(get_max_line_len(panic_msg, panic_msg_lines) * font->width, sb->width);  in draw_panic_static_user()
502 	msg_height = min(panic_msg_lines * font->height, sb->height);  in draw_panic_static_user()
506 	drm_rect_translate(&r_msg, (sb->width - r_msg.x2) / 2, (sb->height - r_msg.y2) / 2);  in draw_panic_static_user()
519  * Return the y-offset of the next line.
524 	int chars_per_row = sb->width / font->width;  in draw_line_with_wrap()
525 	struct drm_rect r_txt = DRM_RECT_INIT(0, yoffset, sb->width, font->height);  in draw_line_with_wrap()
528 	if (line->len > chars_per_row) {  in draw_line_with_wrap()
529 		line_wrap.len = line->len % chars_per_row;  in draw_line_with_wrap()
530 		line_wrap.txt = line->txt + line->len - line_wrap.len;  in draw_line_with_wrap()
532 		r_txt.y1 -= font->height;  in draw_line_with_wrap()
535 		while (line_wrap.txt > line->txt) {  in draw_line_with_wrap()
536 			line_wrap.txt -= chars_per_row;  in draw_line_with_wrap()
539 			r_txt.y1 -= font->height;  in draw_line_with_wrap()
545 		r_txt.y1 -= font->height;  in draw_line_with_wrap()
557 						    sb->format->format);  in draw_panic_static_kmsg()
559 						    sb->format->format);  in draw_panic_static_kmsg()
560 	const struct font_desc *font = get_default_font(sb->width, sb->height, NULL, NULL);  in draw_panic_static_kmsg()
561 	struct drm_rect r_screen = DRM_RECT_INIT(0, 0, sb->width, sb->height);  in draw_panic_static_kmsg()
568 	if (!font || font->width > sb->width)  in draw_panic_static_kmsg()
571 	yoffset = sb->height - font->height - (sb->height % font->height) / 2;  in draw_panic_static_kmsg()
582 		start = kmsg_buf + kmsg_len - 2;  in draw_panic_static_kmsg()
583 		end = kmsg_buf + kmsg_len - 1;  in draw_panic_static_kmsg()
586 				start--;  in draw_panic_static_kmsg()
589 			line.len = end - line.txt;  in draw_panic_static_kmsg()
593 			start--;  in draw_panic_static_kmsg()
601  * pre-allocated. Only 2 buffers and the zlib workspace are needed.
604  * 2) kmsg is zlib-compressed into buffer2
605  * 3) compressed kmsg is encoded as QR-code Numeric stream in buffer1
606  * 4) QR-code image is generated in buffer2
611  * a V40 QR-code (177x177).
617  * 3) QR-code image is generated in buffer1
666 			   utsname()->machine, utsname()->release);  in drm_panic_get_qr_code_url()
676 		return -ENODATA;  in drm_panic_get_qr_code_url()
682 		return -EINVAL;  in drm_panic_get_qr_code_url()
692 		return -EINVAL;  in drm_panic_get_qr_code_url()
695 		return -EINVAL;  in drm_panic_get_qr_code_url()
701 			return -EINVAL;  in drm_panic_get_qr_code_url()
724 		return -ENODATA;  in drm_panic_get_qr_code_raw()
745 						    sb->format->format);  in _draw_panic_static_qr_code()
747 						    sb->format->format);  in _draw_panic_static_qr_code()
748 	const struct font_desc *font = get_default_font(sb->width, sb->height, NULL, NULL);  in _draw_panic_static_qr_code()
756 		return -ENOMEM;  in _draw_panic_static_qr_code()
758 	r_screen = DRM_RECT_INIT(0, 0, sb->width, sb->height);  in _draw_panic_static_qr_code()
762 	msg_width = min(get_max_line_len(panic_msg, panic_msg_lines) * font->width, sb->width);  in _draw_panic_static_qr_code()
763 	msg_height = min(panic_msg_lines * font->height, sb->height);  in _draw_panic_static_qr_code()
766 	max_qr_size = min(3 * sb->width / 4, 3 * sb->height / 4);  in _draw_panic_static_qr_code()
770 		return -ENOSPC;  in _draw_panic_static_qr_code()
776 		return -ENOSPC;  in _draw_panic_static_qr_code()
781 	v_margin = sb->height - drm_rect_height(&r_qr_canvas) - drm_rect_height(&r_msg);  in _draw_panic_static_qr_code()
783 		return -ENOSPC;  in _draw_panic_static_qr_code()
786 	drm_rect_translate(&r_qr_canvas, (sb->width - r_qr_canvas.x2) / 2, 2 * v_margin);  in _draw_panic_static_qr_code()
791 	drm_rect_translate(&r_msg, (sb->width - r_msg.x2) / 2,  in _draw_panic_static_qr_code()
834 	if (format->num_planes != 1)  in drm_panic_is_format_supported()
836 	return drm_draw_color_from_xrgb8888(0xffffff, format->format) != 0;  in drm_panic_is_format_supported()
855 		struct drm_panic_line *desc_line = &panic_msg[panic_msg_lines - 1];  in drm_panic_set_description()
857 		desc_line->txt = description;  in drm_panic_set_description()
860 		if (len && description[len - 1] == '\n')  in drm_panic_set_description()
861 			len -= 1;  in drm_panic_set_description()
862 		desc_line->len = len;  in drm_panic_set_description()
868 	struct drm_panic_line *desc_line = &panic_msg[panic_msg_lines - 1];  in drm_panic_clear_description()
870 	desc_line->len = 0;  in drm_panic_clear_description()
871 	desc_line->txt = NULL;  in drm_panic_clear_description()
880 	if (!drm_panic_trylock(plane->dev, flags))  in draw_panic_plane()
883 	ret = plane->helper_private->get_scanout_buffer(plane, &sb);  in draw_panic_plane()
895 	if (plane->helper_private->panic_flush)  in draw_panic_plane()
896 		plane->helper_private->panic_flush(plane);  in draw_panic_plane()
901 	drm_panic_unlock(plane->dev, flags);  in draw_panic_plane()
913 	if (detail->reason == KMSG_DUMP_PANIC)  in drm_panic()
914 		draw_panic_plane(plane, detail->description);  in drm_panic()
932 		struct drm_plane *plane = file->private_data;  in debugfs_trigger_write()
950 	debugfs_create_file(fname, 0200, plane->dev->debugfs_root,  in debugfs_register_plane()
967 	if (!dev->mode_config.num_total_plane)  in drm_panic_is_enabled()
971 		if (plane->helper_private && plane->helper_private->get_scanout_buffer)  in drm_panic_is_enabled()
978  * drm_panic_register() - Initialize DRM panic for a device
986 	if (!dev->mode_config.num_total_plane)  in drm_panic_register()
990 		if (!plane->helper_private || !plane->helper_private->get_scanout_buffer)  in drm_panic_register()
992 		plane->kmsg_panic.dump = drm_panic;  in drm_panic_register()
993 		plane->kmsg_panic.max_reason = KMSG_DUMP_PANIC;  in drm_panic_register()
994 		if (kmsg_dump_register(&plane->kmsg_panic))  in drm_panic_register()
1013 	if (!dev->mode_config.num_total_plane)  in drm_panic_unregister()
1017 		if (!plane->helper_private || !plane->helper_private->get_scanout_buffer)  in drm_panic_unregister()
1019 		kmsg_dump_unregister(&plane->kmsg_panic);  in drm_panic_unregister()
1024  * drm_panic_init() - initialize DRM panic.
1032  * drm_panic_exit() - Free the resources taken by drm_panic_exit()