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14#include <linux/module.h>
15
16#include <linux/compat.h>
17#include <linux/types.h>
18#include <linux/errno.h>
19#include <linux/kernel.h>
20#include <linux/major.h>
21#include <linux/slab.h>
22#include <linux/mm.h>
23#include <linux/mman.h>
24#include <linux/vt.h>
25#include <linux/init.h>
26#include <linux/linux_logo.h>
27#include <linux/proc_fs.h>
28#include <linux/seq_file.h>
29#include <linux/console.h>
30#include <linux/kmod.h>
31#include <linux/err.h>
32#include <linux/device.h>
33#include <linux/efi.h>
34#include <linux/fb.h>
35#include <linux/fbcon.h>
36#include <linux/mem_encrypt.h>
37#include <linux/pci.h>
38
39#include <asm/fb.h>
40
41
42
43
44
45
46#define FBPIXMAPSIZE (1024 * 8)
47
48static DEFINE_MUTEX(registration_lock);
49
50struct fb_info *registered_fb[FB_MAX] __read_mostly;
51EXPORT_SYMBOL(registered_fb);
52
53int num_registered_fb __read_mostly;
54EXPORT_SYMBOL(num_registered_fb);
55
56bool fb_center_logo __read_mostly;
57
58int fb_logo_count __read_mostly = -1;
59
60static struct fb_info *get_fb_info(unsigned int idx)
61{
62 struct fb_info *fb_info;
63
64 if (idx >= FB_MAX)
65 return ERR_PTR(-ENODEV);
66
67 mutex_lock(®istration_lock);
68 fb_info = registered_fb[idx];
69 if (fb_info)
70 atomic_inc(&fb_info->count);
71 mutex_unlock(®istration_lock);
72
73 return fb_info;
74}
75
76static void put_fb_info(struct fb_info *fb_info)
77{
78 if (!atomic_dec_and_test(&fb_info->count))
79 return;
80 if (fb_info->fbops->fb_destroy)
81 fb_info->fbops->fb_destroy(fb_info);
82}
83
84
85
86
87
88int fb_get_color_depth(struct fb_var_screeninfo *var,
89 struct fb_fix_screeninfo *fix)
90{
91 int depth = 0;
92
93 if (fix->visual == FB_VISUAL_MONO01 ||
94 fix->visual == FB_VISUAL_MONO10)
95 depth = 1;
96 else {
97 if (var->green.length == var->blue.length &&
98 var->green.length == var->red.length &&
99 var->green.offset == var->blue.offset &&
100 var->green.offset == var->red.offset)
101 depth = var->green.length;
102 else
103 depth = var->green.length + var->red.length +
104 var->blue.length;
105 }
106
107 return depth;
108}
109EXPORT_SYMBOL(fb_get_color_depth);
110
111
112
113
114void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
115{
116 __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
117}
118EXPORT_SYMBOL(fb_pad_aligned_buffer);
119
120void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
121 u32 shift_high, u32 shift_low, u32 mod)
122{
123 u8 mask = (u8) (0xfff << shift_high), tmp;
124 int i, j;
125
126 for (i = height; i--; ) {
127 for (j = 0; j < idx; j++) {
128 tmp = dst[j];
129 tmp &= mask;
130 tmp |= *src >> shift_low;
131 dst[j] = tmp;
132 tmp = *src << shift_high;
133 dst[j+1] = tmp;
134 src++;
135 }
136 tmp = dst[idx];
137 tmp &= mask;
138 tmp |= *src >> shift_low;
139 dst[idx] = tmp;
140 if (shift_high < mod) {
141 tmp = *src << shift_high;
142 dst[idx+1] = tmp;
143 }
144 src++;
145 dst += d_pitch;
146 }
147}
148EXPORT_SYMBOL(fb_pad_unaligned_buffer);
149
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153
154char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
155{
156 u32 align = buf->buf_align - 1, offset;
157 char *addr = buf->addr;
158
159
160
161
162 if (buf->flags & FB_PIXMAP_IO) {
163 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
164 info->fbops->fb_sync(info);
165 return addr;
166 }
167
168
169 offset = buf->offset + align;
170 offset &= ~align;
171 if (offset + size > buf->size) {
172
173
174
175
176 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
177 info->fbops->fb_sync(info);
178 offset = 0;
179 }
180 buf->offset = offset + size;
181 addr += offset;
182
183 return addr;
184}
185EXPORT_SYMBOL(fb_get_buffer_offset);
186
187#ifdef CONFIG_LOGO
188
189static inline unsigned safe_shift(unsigned d, int n)
190{
191 return n < 0 ? d >> -n : d << n;
192}
193
194static void fb_set_logocmap(struct fb_info *info,
195 const struct linux_logo *logo)
196{
197 struct fb_cmap palette_cmap;
198 u16 palette_green[16];
199 u16 palette_blue[16];
200 u16 palette_red[16];
201 int i, j, n;
202 const unsigned char *clut = logo->clut;
203
204 palette_cmap.start = 0;
205 palette_cmap.len = 16;
206 palette_cmap.red = palette_red;
207 palette_cmap.green = palette_green;
208 palette_cmap.blue = palette_blue;
209 palette_cmap.transp = NULL;
210
211 for (i = 0; i < logo->clutsize; i += n) {
212 n = logo->clutsize - i;
213
214 if (n > 16)
215 n = 16;
216 palette_cmap.start = 32 + i;
217 palette_cmap.len = n;
218 for (j = 0; j < n; ++j) {
219 palette_cmap.red[j] = clut[0] << 8 | clut[0];
220 palette_cmap.green[j] = clut[1] << 8 | clut[1];
221 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
222 clut += 3;
223 }
224 fb_set_cmap(&palette_cmap, info);
225 }
226}
227
228static void fb_set_logo_truepalette(struct fb_info *info,
229 const struct linux_logo *logo,
230 u32 *palette)
231{
232 static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
233 unsigned char redmask, greenmask, bluemask;
234 int redshift, greenshift, blueshift;
235 int i;
236 const unsigned char *clut = logo->clut;
237
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242
243 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
244 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
245 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
246 redshift = info->var.red.offset - (8 - info->var.red.length);
247 greenshift = info->var.green.offset - (8 - info->var.green.length);
248 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
249
250 for ( i = 0; i < logo->clutsize; i++) {
251 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
252 safe_shift((clut[1] & greenmask), greenshift) |
253 safe_shift((clut[2] & bluemask), blueshift));
254 clut += 3;
255 }
256}
257
258static void fb_set_logo_directpalette(struct fb_info *info,
259 const struct linux_logo *logo,
260 u32 *palette)
261{
262 int redshift, greenshift, blueshift;
263 int i;
264
265 redshift = info->var.red.offset;
266 greenshift = info->var.green.offset;
267 blueshift = info->var.blue.offset;
268
269 for (i = 32; i < 32 + logo->clutsize; i++)
270 palette[i] = i << redshift | i << greenshift | i << blueshift;
271}
272
273static void fb_set_logo(struct fb_info *info,
274 const struct linux_logo *logo, u8 *dst,
275 int depth)
276{
277 int i, j, k;
278 const u8 *src = logo->data;
279 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
280 u8 fg = 1, d;
281
282 switch (fb_get_color_depth(&info->var, &info->fix)) {
283 case 1:
284 fg = 1;
285 break;
286 case 2:
287 fg = 3;
288 break;
289 default:
290 fg = 7;
291 break;
292 }
293
294 if (info->fix.visual == FB_VISUAL_MONO01 ||
295 info->fix.visual == FB_VISUAL_MONO10)
296 fg = ~((u8) (0xfff << info->var.green.length));
297
298 switch (depth) {
299 case 4:
300 for (i = 0; i < logo->height; i++)
301 for (j = 0; j < logo->width; src++) {
302 *dst++ = *src >> 4;
303 j++;
304 if (j < logo->width) {
305 *dst++ = *src & 0x0f;
306 j++;
307 }
308 }
309 break;
310 case 1:
311 for (i = 0; i < logo->height; i++) {
312 for (j = 0; j < logo->width; src++) {
313 d = *src ^ xor;
314 for (k = 7; k >= 0 && j < logo->width; k--) {
315 *dst++ = ((d >> k) & 1) ? fg : 0;
316 j++;
317 }
318 }
319 }
320 break;
321 }
322}
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350static struct logo_data {
351 int depth;
352 int needs_directpalette;
353 int needs_truepalette;
354 int needs_cmapreset;
355 const struct linux_logo *logo;
356} fb_logo __read_mostly;
357
358static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
359{
360 u32 size = width * height, i;
361
362 out += size - 1;
363
364 for (i = size; i--; )
365 *out-- = *in++;
366}
367
368static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
369{
370 int i, j, h = height - 1;
371
372 for (i = 0; i < height; i++)
373 for (j = 0; j < width; j++)
374 out[height * j + h - i] = *in++;
375}
376
377static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
378{
379 int i, j, w = width - 1;
380
381 for (i = 0; i < height; i++)
382 for (j = 0; j < width; j++)
383 out[height * (w - j) + i] = *in++;
384}
385
386static void fb_rotate_logo(struct fb_info *info, u8 *dst,
387 struct fb_image *image, int rotate)
388{
389 u32 tmp;
390
391 if (rotate == FB_ROTATE_UD) {
392 fb_rotate_logo_ud(image->data, dst, image->width,
393 image->height);
394 image->dx = info->var.xres - image->width - image->dx;
395 image->dy = info->var.yres - image->height - image->dy;
396 } else if (rotate == FB_ROTATE_CW) {
397 fb_rotate_logo_cw(image->data, dst, image->width,
398 image->height);
399 tmp = image->width;
400 image->width = image->height;
401 image->height = tmp;
402 tmp = image->dy;
403 image->dy = image->dx;
404 image->dx = info->var.xres - image->width - tmp;
405 } else if (rotate == FB_ROTATE_CCW) {
406 fb_rotate_logo_ccw(image->data, dst, image->width,
407 image->height);
408 tmp = image->width;
409 image->width = image->height;
410 image->height = tmp;
411 tmp = image->dx;
412 image->dx = image->dy;
413 image->dy = info->var.yres - image->height - tmp;
414 }
415
416 image->data = dst;
417}
418
419static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
420 int rotate, unsigned int num)
421{
422 unsigned int x;
423
424 if (image->width > info->var.xres || image->height > info->var.yres)
425 return;
426
427 if (rotate == FB_ROTATE_UR) {
428 for (x = 0;
429 x < num && image->dx + image->width <= info->var.xres;
430 x++) {
431 info->fbops->fb_imageblit(info, image);
432 image->dx += image->width + 8;
433 }
434 } else if (rotate == FB_ROTATE_UD) {
435 u32 dx = image->dx;
436
437 for (x = 0; x < num && image->dx <= dx; x++) {
438 info->fbops->fb_imageblit(info, image);
439 image->dx -= image->width + 8;
440 }
441 } else if (rotate == FB_ROTATE_CW) {
442 for (x = 0;
443 x < num && image->dy + image->height <= info->var.yres;
444 x++) {
445 info->fbops->fb_imageblit(info, image);
446 image->dy += image->height + 8;
447 }
448 } else if (rotate == FB_ROTATE_CCW) {
449 u32 dy = image->dy;
450
451 for (x = 0; x < num && image->dy <= dy; x++) {
452 info->fbops->fb_imageblit(info, image);
453 image->dy -= image->height + 8;
454 }
455 }
456}
457
458static int fb_show_logo_line(struct fb_info *info, int rotate,
459 const struct linux_logo *logo, int y,
460 unsigned int n)
461{
462 u32 *palette = NULL, *saved_pseudo_palette = NULL;
463 unsigned char *logo_new = NULL, *logo_rotate = NULL;
464 struct fb_image image;
465
466
467 if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
468 info->fbops->owner)
469 return 0;
470
471 image.depth = 8;
472 image.data = logo->data;
473
474 if (fb_logo.needs_cmapreset)
475 fb_set_logocmap(info, logo);
476
477 if (fb_logo.needs_truepalette ||
478 fb_logo.needs_directpalette) {
479 palette = kmalloc(256 * 4, GFP_KERNEL);
480 if (palette == NULL)
481 return 0;
482
483 if (fb_logo.needs_truepalette)
484 fb_set_logo_truepalette(info, logo, palette);
485 else
486 fb_set_logo_directpalette(info, logo, palette);
487
488 saved_pseudo_palette = info->pseudo_palette;
489 info->pseudo_palette = palette;
490 }
491
492 if (fb_logo.depth <= 4) {
493 logo_new = kmalloc_array(logo->width, logo->height,
494 GFP_KERNEL);
495 if (logo_new == NULL) {
496 kfree(palette);
497 if (saved_pseudo_palette)
498 info->pseudo_palette = saved_pseudo_palette;
499 return 0;
500 }
501 image.data = logo_new;
502 fb_set_logo(info, logo, logo_new, fb_logo.depth);
503 }
504
505 if (fb_center_logo) {
506 int xres = info->var.xres;
507 int yres = info->var.yres;
508
509 if (rotate == FB_ROTATE_CW || rotate == FB_ROTATE_CCW) {
510 xres = info->var.yres;
511 yres = info->var.xres;
512 }
513
514 while (n && (n * (logo->width + 8) - 8 > xres))
515 --n;
516 image.dx = (xres - n * (logo->width + 8) - 8) / 2;
517 image.dy = y ?: (yres - logo->height) / 2;
518 } else {
519 image.dx = 0;
520 image.dy = y;
521 }
522
523 image.width = logo->width;
524 image.height = logo->height;
525
526 if (rotate) {
527 logo_rotate = kmalloc_array(logo->width, logo->height,
528 GFP_KERNEL);
529 if (logo_rotate)
530 fb_rotate_logo(info, logo_rotate, &image, rotate);
531 }
532
533 fb_do_show_logo(info, &image, rotate, n);
534
535 kfree(palette);
536 if (saved_pseudo_palette != NULL)
537 info->pseudo_palette = saved_pseudo_palette;
538 kfree(logo_new);
539 kfree(logo_rotate);
540 return image.dy + logo->height;
541}
542
543
544#ifdef CONFIG_FB_LOGO_EXTRA
545
546#define FB_LOGO_EX_NUM_MAX 10
547static struct logo_data_extra {
548 const struct linux_logo *logo;
549 unsigned int n;
550} fb_logo_ex[FB_LOGO_EX_NUM_MAX];
551static unsigned int fb_logo_ex_num;
552
553void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
554{
555 if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
556 return;
557
558 fb_logo_ex[fb_logo_ex_num].logo = logo;
559 fb_logo_ex[fb_logo_ex_num].n = n;
560 fb_logo_ex_num++;
561}
562
563static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
564 unsigned int yres)
565{
566 unsigned int i;
567
568
569 if (info->fix.visual != FB_VISUAL_TRUECOLOR)
570 fb_logo_ex_num = 0;
571
572 for (i = 0; i < fb_logo_ex_num; i++) {
573 if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
574 fb_logo_ex[i].logo = NULL;
575 continue;
576 }
577 height += fb_logo_ex[i].logo->height;
578 if (height > yres) {
579 height -= fb_logo_ex[i].logo->height;
580 fb_logo_ex_num = i;
581 break;
582 }
583 }
584 return height;
585}
586
587static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
588{
589 unsigned int i;
590
591 for (i = 0; i < fb_logo_ex_num; i++)
592 y = fb_show_logo_line(info, rotate,
593 fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
594
595 return y;
596}
597
598#else
599
600static inline int fb_prepare_extra_logos(struct fb_info *info,
601 unsigned int height,
602 unsigned int yres)
603{
604 return height;
605}
606
607static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
608{
609 return y;
610}
611
612#endif
613
614
615int fb_prepare_logo(struct fb_info *info, int rotate)
616{
617 int depth = fb_get_color_depth(&info->var, &info->fix);
618 unsigned int yres;
619 int height;
620
621 memset(&fb_logo, 0, sizeof(struct logo_data));
622
623 if (info->flags & FBINFO_MISC_TILEBLITTING ||
624 info->fbops->owner || !fb_logo_count)
625 return 0;
626
627 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
628 depth = info->var.blue.length;
629 if (info->var.red.length < depth)
630 depth = info->var.red.length;
631 if (info->var.green.length < depth)
632 depth = info->var.green.length;
633 }
634
635 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
636
637 depth = 4;
638 }
639
640
641 fb_logo.logo = fb_find_logo(depth);
642
643 if (!fb_logo.logo) {
644 return 0;
645 }
646
647 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
648 yres = info->var.yres;
649 else
650 yres = info->var.xres;
651
652 if (fb_logo.logo->height > yres) {
653 fb_logo.logo = NULL;
654 return 0;
655 }
656
657
658 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
659 fb_logo.depth = 8;
660 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
661 fb_logo.depth = 4;
662 else
663 fb_logo.depth = 1;
664
665
666 if (fb_logo.depth > 4 && depth > 4) {
667 switch (info->fix.visual) {
668 case FB_VISUAL_TRUECOLOR:
669 fb_logo.needs_truepalette = 1;
670 break;
671 case FB_VISUAL_DIRECTCOLOR:
672 fb_logo.needs_directpalette = 1;
673 fb_logo.needs_cmapreset = 1;
674 break;
675 case FB_VISUAL_PSEUDOCOLOR:
676 fb_logo.needs_cmapreset = 1;
677 break;
678 }
679 }
680
681 height = fb_logo.logo->height;
682 if (fb_center_logo)
683 height += (yres - fb_logo.logo->height) / 2;
684
685 return fb_prepare_extra_logos(info, height, yres);
686}
687
688int fb_show_logo(struct fb_info *info, int rotate)
689{
690 unsigned int count;
691 int y;
692
693 if (!fb_logo_count)
694 return 0;
695
696 count = fb_logo_count < 0 ? num_online_cpus() : fb_logo_count;
697 y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, count);
698 y = fb_show_extra_logos(info, y, rotate);
699
700 return y;
701}
702#else
703int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
704int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
705#endif
706EXPORT_SYMBOL(fb_prepare_logo);
707EXPORT_SYMBOL(fb_show_logo);
708
709static void *fb_seq_start(struct seq_file *m, loff_t *pos)
710{
711 mutex_lock(®istration_lock);
712 return (*pos < FB_MAX) ? pos : NULL;
713}
714
715static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
716{
717 (*pos)++;
718 return (*pos < FB_MAX) ? pos : NULL;
719}
720
721static void fb_seq_stop(struct seq_file *m, void *v)
722{
723 mutex_unlock(®istration_lock);
724}
725
726static int fb_seq_show(struct seq_file *m, void *v)
727{
728 int i = *(loff_t *)v;
729 struct fb_info *fi = registered_fb[i];
730
731 if (fi)
732 seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
733 return 0;
734}
735
736static const struct seq_operations proc_fb_seq_ops = {
737 .start = fb_seq_start,
738 .next = fb_seq_next,
739 .stop = fb_seq_stop,
740 .show = fb_seq_show,
741};
742
743
744
745
746
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749
750
751static struct fb_info *file_fb_info(struct file *file)
752{
753 struct inode *inode = file_inode(file);
754 int fbidx = iminor(inode);
755 struct fb_info *info = registered_fb[fbidx];
756
757 if (info != file->private_data)
758 info = NULL;
759 return info;
760}
761
762static ssize_t
763fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
764{
765 unsigned long p = *ppos;
766 struct fb_info *info = file_fb_info(file);
767 u8 *buffer, *dst;
768 u8 __iomem *src;
769 int c, cnt = 0, err = 0;
770 unsigned long total_size;
771
772 if (!info || ! info->screen_base)
773 return -ENODEV;
774
775 if (info->state != FBINFO_STATE_RUNNING)
776 return -EPERM;
777
778 if (info->fbops->fb_read)
779 return info->fbops->fb_read(info, buf, count, ppos);
780
781 total_size = info->screen_size;
782
783 if (total_size == 0)
784 total_size = info->fix.smem_len;
785
786 if (p >= total_size)
787 return 0;
788
789 if (count >= total_size)
790 count = total_size;
791
792 if (count + p > total_size)
793 count = total_size - p;
794
795 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
796 GFP_KERNEL);
797 if (!buffer)
798 return -ENOMEM;
799
800 src = (u8 __iomem *) (info->screen_base + p);
801
802 if (info->fbops->fb_sync)
803 info->fbops->fb_sync(info);
804
805 while (count) {
806 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
807 dst = buffer;
808 fb_memcpy_fromfb(dst, src, c);
809 dst += c;
810 src += c;
811
812 if (copy_to_user(buf, buffer, c)) {
813 err = -EFAULT;
814 break;
815 }
816 *ppos += c;
817 buf += c;
818 cnt += c;
819 count -= c;
820 }
821
822 kfree(buffer);
823
824 return (err) ? err : cnt;
825}
826
827static ssize_t
828fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
829{
830 unsigned long p = *ppos;
831 struct fb_info *info = file_fb_info(file);
832 u8 *buffer, *src;
833 u8 __iomem *dst;
834 int c, cnt = 0, err = 0;
835 unsigned long total_size;
836
837 if (!info || !info->screen_base)
838 return -ENODEV;
839
840 if (info->state != FBINFO_STATE_RUNNING)
841 return -EPERM;
842
843 if (info->fbops->fb_write)
844 return info->fbops->fb_write(info, buf, count, ppos);
845
846 total_size = info->screen_size;
847
848 if (total_size == 0)
849 total_size = info->fix.smem_len;
850
851 if (p > total_size)
852 return -EFBIG;
853
854 if (count > total_size) {
855 err = -EFBIG;
856 count = total_size;
857 }
858
859 if (count + p > total_size) {
860 if (!err)
861 err = -ENOSPC;
862
863 count = total_size - p;
864 }
865
866 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
867 GFP_KERNEL);
868 if (!buffer)
869 return -ENOMEM;
870
871 dst = (u8 __iomem *) (info->screen_base + p);
872
873 if (info->fbops->fb_sync)
874 info->fbops->fb_sync(info);
875
876 while (count) {
877 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
878 src = buffer;
879
880 if (copy_from_user(src, buf, c)) {
881 err = -EFAULT;
882 break;
883 }
884
885 fb_memcpy_tofb(dst, src, c);
886 dst += c;
887 src += c;
888 *ppos += c;
889 buf += c;
890 cnt += c;
891 count -= c;
892 }
893
894 kfree(buffer);
895
896 return (cnt) ? cnt : err;
897}
898
899int
900fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
901{
902 struct fb_fix_screeninfo *fix = &info->fix;
903 unsigned int yres = info->var.yres;
904 int err = 0;
905
906 if (var->yoffset > 0) {
907 if (var->vmode & FB_VMODE_YWRAP) {
908 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
909 err = -EINVAL;
910 else
911 yres = 0;
912 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
913 err = -EINVAL;
914 }
915
916 if (var->xoffset > 0 && (!fix->xpanstep ||
917 (var->xoffset % fix->xpanstep)))
918 err = -EINVAL;
919
920 if (err || !info->fbops->fb_pan_display ||
921 var->yoffset > info->var.yres_virtual - yres ||
922 var->xoffset > info->var.xres_virtual - info->var.xres)
923 return -EINVAL;
924
925 if ((err = info->fbops->fb_pan_display(var, info)))
926 return err;
927 info->var.xoffset = var->xoffset;
928 info->var.yoffset = var->yoffset;
929 if (var->vmode & FB_VMODE_YWRAP)
930 info->var.vmode |= FB_VMODE_YWRAP;
931 else
932 info->var.vmode &= ~FB_VMODE_YWRAP;
933 return 0;
934}
935EXPORT_SYMBOL(fb_pan_display);
936
937static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
938 u32 activate)
939{
940 struct fb_blit_caps caps, fbcaps;
941 int err = 0;
942
943 memset(&caps, 0, sizeof(caps));
944 memset(&fbcaps, 0, sizeof(fbcaps));
945 caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
946 fbcon_get_requirement(info, &caps);
947 info->fbops->fb_get_caps(info, &fbcaps, var);
948
949 if (((fbcaps.x ^ caps.x) & caps.x) ||
950 ((fbcaps.y ^ caps.y) & caps.y) ||
951 (fbcaps.len < caps.len))
952 err = -EINVAL;
953
954 return err;
955}
956
957int
958fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
959{
960 int ret = 0;
961 u32 activate;
962 struct fb_var_screeninfo old_var;
963 struct fb_videomode mode;
964 struct fb_event event;
965
966 if (var->activate & FB_ACTIVATE_INV_MODE) {
967 struct fb_videomode mode1, mode2;
968
969 fb_var_to_videomode(&mode1, var);
970 fb_var_to_videomode(&mode2, &info->var);
971
972 ret = fb_mode_is_equal(&mode1, &mode2);
973
974 if (!ret)
975 fbcon_mode_deleted(info, &mode1);
976
977 if (!ret)
978 fb_delete_videomode(&mode1, &info->modelist);
979
980
981 return ret ? -EINVAL : 0;
982 }
983
984 if (!(var->activate & FB_ACTIVATE_FORCE) &&
985 !memcmp(&info->var, var, sizeof(struct fb_var_screeninfo)))
986 return 0;
987
988 activate = var->activate;
989
990
991
992
993 if ((info->fix.capabilities & FB_CAP_FOURCC) &&
994 var->grayscale > 1) {
995 if (var->red.offset || var->green.offset ||
996 var->blue.offset || var->transp.offset ||
997 var->red.length || var->green.length ||
998 var->blue.length || var->transp.length ||
999 var->red.msb_right || var->green.msb_right ||
1000 var->blue.msb_right || var->transp.msb_right)
1001 return -EINVAL;
1002 }
1003
1004 if (!info->fbops->fb_check_var) {
1005 *var = info->var;
1006 return 0;
1007 }
1008
1009 ret = info->fbops->fb_check_var(var, info);
1010
1011 if (ret)
1012 return ret;
1013
1014 if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW)
1015 return 0;
1016
1017 if (info->fbops->fb_get_caps) {
1018 ret = fb_check_caps(info, var, activate);
1019
1020 if (ret)
1021 return ret;
1022 }
1023
1024 old_var = info->var;
1025 info->var = *var;
1026
1027 if (info->fbops->fb_set_par) {
1028 ret = info->fbops->fb_set_par(info);
1029
1030 if (ret) {
1031 info->var = old_var;
1032 printk(KERN_WARNING "detected "
1033 "fb_set_par error, "
1034 "error code: %d\n", ret);
1035 return ret;
1036 }
1037 }
1038
1039 fb_pan_display(info, &info->var);
1040 fb_set_cmap(&info->cmap, info);
1041 fb_var_to_videomode(&mode, &info->var);
1042
1043 if (info->modelist.prev && info->modelist.next &&
1044 !list_empty(&info->modelist))
1045 ret = fb_add_videomode(&mode, &info->modelist);
1046
1047 if (ret)
1048 return ret;
1049
1050 event.info = info;
1051 event.data = &mode;
1052 fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event);
1053
1054 return 0;
1055}
1056EXPORT_SYMBOL(fb_set_var);
1057
1058int
1059fb_blank(struct fb_info *info, int blank)
1060{
1061 struct fb_event event;
1062 int ret = -EINVAL;
1063
1064 if (blank > FB_BLANK_POWERDOWN)
1065 blank = FB_BLANK_POWERDOWN;
1066
1067 event.info = info;
1068 event.data = ␣
1069
1070 if (info->fbops->fb_blank)
1071 ret = info->fbops->fb_blank(blank, info);
1072
1073 if (!ret)
1074 fb_notifier_call_chain(FB_EVENT_BLANK, &event);
1075
1076 return ret;
1077}
1078EXPORT_SYMBOL(fb_blank);
1079
1080static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
1081 unsigned long arg)
1082{
1083 const struct fb_ops *fb;
1084 struct fb_var_screeninfo var;
1085 struct fb_fix_screeninfo fix;
1086 struct fb_cmap cmap_from;
1087 struct fb_cmap_user cmap;
1088 void __user *argp = (void __user *)arg;
1089 long ret = 0;
1090
1091 switch (cmd) {
1092 case FBIOGET_VSCREENINFO:
1093 lock_fb_info(info);
1094 var = info->var;
1095 unlock_fb_info(info);
1096
1097 ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0;
1098 break;
1099 case FBIOPUT_VSCREENINFO:
1100 if (copy_from_user(&var, argp, sizeof(var)))
1101 return -EFAULT;
1102 console_lock();
1103 lock_fb_info(info);
1104 ret = fb_set_var(info, &var);
1105 if (!ret)
1106 fbcon_update_vcs(info, var.activate & FB_ACTIVATE_ALL);
1107 unlock_fb_info(info);
1108 console_unlock();
1109 if (!ret && copy_to_user(argp, &var, sizeof(var)))
1110 ret = -EFAULT;
1111 break;
1112 case FBIOGET_FSCREENINFO:
1113 lock_fb_info(info);
1114 memcpy(&fix, &info->fix, sizeof(fix));
1115 if (info->flags & FBINFO_HIDE_SMEM_START)
1116 fix.smem_start = 0;
1117 unlock_fb_info(info);
1118
1119 ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0;
1120 break;
1121 case FBIOPUTCMAP:
1122 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1123 return -EFAULT;
1124 ret = fb_set_user_cmap(&cmap, info);
1125 break;
1126 case FBIOGETCMAP:
1127 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1128 return -EFAULT;
1129 lock_fb_info(info);
1130 cmap_from = info->cmap;
1131 unlock_fb_info(info);
1132 ret = fb_cmap_to_user(&cmap_from, &cmap);
1133 break;
1134 case FBIOPAN_DISPLAY:
1135 if (copy_from_user(&var, argp, sizeof(var)))
1136 return -EFAULT;
1137 console_lock();
1138 lock_fb_info(info);
1139 ret = fb_pan_display(info, &var);
1140 unlock_fb_info(info);
1141 console_unlock();
1142 if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
1143 return -EFAULT;
1144 break;
1145 case FBIO_CURSOR:
1146 ret = -EINVAL;
1147 break;
1148 case FBIOGET_CON2FBMAP:
1149 ret = fbcon_get_con2fb_map_ioctl(argp);
1150 break;
1151 case FBIOPUT_CON2FBMAP:
1152 ret = fbcon_set_con2fb_map_ioctl(argp);
1153 break;
1154 case FBIOBLANK:
1155 console_lock();
1156 lock_fb_info(info);
1157 ret = fb_blank(info, arg);
1158
1159 fbcon_fb_blanked(info, arg);
1160 unlock_fb_info(info);
1161 console_unlock();
1162 break;
1163 default:
1164 lock_fb_info(info);
1165 fb = info->fbops;
1166 if (fb->fb_ioctl)
1167 ret = fb->fb_ioctl(info, cmd, arg);
1168 else
1169 ret = -ENOTTY;
1170 unlock_fb_info(info);
1171 }
1172 return ret;
1173}
1174
1175static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1176{
1177 struct fb_info *info = file_fb_info(file);
1178
1179 if (!info)
1180 return -ENODEV;
1181 return do_fb_ioctl(info, cmd, arg);
1182}
1183
1184#ifdef CONFIG_COMPAT
1185struct fb_fix_screeninfo32 {
1186 char id[16];
1187 compat_caddr_t smem_start;
1188 u32 smem_len;
1189 u32 type;
1190 u32 type_aux;
1191 u32 visual;
1192 u16 xpanstep;
1193 u16 ypanstep;
1194 u16 ywrapstep;
1195 u32 line_length;
1196 compat_caddr_t mmio_start;
1197 u32 mmio_len;
1198 u32 accel;
1199 u16 reserved[3];
1200};
1201
1202struct fb_cmap32 {
1203 u32 start;
1204 u32 len;
1205 compat_caddr_t red;
1206 compat_caddr_t green;
1207 compat_caddr_t blue;
1208 compat_caddr_t transp;
1209};
1210
1211static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
1212 unsigned long arg)
1213{
1214 struct fb_cmap_user __user *cmap;
1215 struct fb_cmap32 __user *cmap32;
1216 __u32 data;
1217 int err;
1218
1219 cmap = compat_alloc_user_space(sizeof(*cmap));
1220 cmap32 = compat_ptr(arg);
1221
1222 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1223 return -EFAULT;
1224
1225 if (get_user(data, &cmap32->red) ||
1226 put_user(compat_ptr(data), &cmap->red) ||
1227 get_user(data, &cmap32->green) ||
1228 put_user(compat_ptr(data), &cmap->green) ||
1229 get_user(data, &cmap32->blue) ||
1230 put_user(compat_ptr(data), &cmap->blue) ||
1231 get_user(data, &cmap32->transp) ||
1232 put_user(compat_ptr(data), &cmap->transp))
1233 return -EFAULT;
1234
1235 err = do_fb_ioctl(info, cmd, (unsigned long) cmap);
1236
1237 if (!err) {
1238 if (copy_in_user(&cmap32->start,
1239 &cmap->start,
1240 2 * sizeof(__u32)))
1241 err = -EFAULT;
1242 }
1243 return err;
1244}
1245
1246static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1247 struct fb_fix_screeninfo32 __user *fix32)
1248{
1249 __u32 data;
1250 int err;
1251
1252 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1253
1254 data = (__u32) (unsigned long) fix->smem_start;
1255 err |= put_user(data, &fix32->smem_start);
1256
1257 err |= put_user(fix->smem_len, &fix32->smem_len);
1258 err |= put_user(fix->type, &fix32->type);
1259 err |= put_user(fix->type_aux, &fix32->type_aux);
1260 err |= put_user(fix->visual, &fix32->visual);
1261 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1262 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1263 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1264 err |= put_user(fix->line_length, &fix32->line_length);
1265
1266 data = (__u32) (unsigned long) fix->mmio_start;
1267 err |= put_user(data, &fix32->mmio_start);
1268
1269 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1270 err |= put_user(fix->accel, &fix32->accel);
1271 err |= copy_to_user(fix32->reserved, fix->reserved,
1272 sizeof(fix->reserved));
1273
1274 if (err)
1275 return -EFAULT;
1276 return 0;
1277}
1278
1279static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
1280 unsigned long arg)
1281{
1282 struct fb_fix_screeninfo fix;
1283
1284 lock_fb_info(info);
1285 fix = info->fix;
1286 if (info->flags & FBINFO_HIDE_SMEM_START)
1287 fix.smem_start = 0;
1288 unlock_fb_info(info);
1289 return do_fscreeninfo_to_user(&fix, compat_ptr(arg));
1290}
1291
1292static long fb_compat_ioctl(struct file *file, unsigned int cmd,
1293 unsigned long arg)
1294{
1295 struct fb_info *info = file_fb_info(file);
1296 const struct fb_ops *fb;
1297 long ret = -ENOIOCTLCMD;
1298
1299 if (!info)
1300 return -ENODEV;
1301 fb = info->fbops;
1302 switch(cmd) {
1303 case FBIOGET_VSCREENINFO:
1304 case FBIOPUT_VSCREENINFO:
1305 case FBIOPAN_DISPLAY:
1306 case FBIOGET_CON2FBMAP:
1307 case FBIOPUT_CON2FBMAP:
1308 arg = (unsigned long) compat_ptr(arg);
1309 fallthrough;
1310 case FBIOBLANK:
1311 ret = do_fb_ioctl(info, cmd, arg);
1312 break;
1313
1314 case FBIOGET_FSCREENINFO:
1315 ret = fb_get_fscreeninfo(info, cmd, arg);
1316 break;
1317
1318 case FBIOGETCMAP:
1319 case FBIOPUTCMAP:
1320 ret = fb_getput_cmap(info, cmd, arg);
1321 break;
1322
1323 default:
1324 if (fb->fb_compat_ioctl)
1325 ret = fb->fb_compat_ioctl(info, cmd, arg);
1326 break;
1327 }
1328 return ret;
1329}
1330#endif
1331
1332static int
1333fb_mmap(struct file *file, struct vm_area_struct * vma)
1334{
1335 struct fb_info *info = file_fb_info(file);
1336 int (*fb_mmap_fn)(struct fb_info *info, struct vm_area_struct *vma);
1337 unsigned long mmio_pgoff;
1338 unsigned long start;
1339 u32 len;
1340
1341 if (!info)
1342 return -ENODEV;
1343 mutex_lock(&info->mm_lock);
1344
1345 fb_mmap_fn = info->fbops->fb_mmap;
1346
1347#if IS_ENABLED(CONFIG_FB_DEFERRED_IO)
1348 if (info->fbdefio)
1349 fb_mmap_fn = fb_deferred_io_mmap;
1350#endif
1351
1352 if (fb_mmap_fn) {
1353 int res;
1354
1355
1356
1357
1358
1359 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
1360 res = fb_mmap_fn(info, vma);
1361 mutex_unlock(&info->mm_lock);
1362 return res;
1363 }
1364
1365
1366
1367
1368
1369 start = info->fix.smem_start;
1370 len = info->fix.smem_len;
1371 mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT;
1372 if (vma->vm_pgoff >= mmio_pgoff) {
1373 if (info->var.accel_flags) {
1374 mutex_unlock(&info->mm_lock);
1375 return -EINVAL;
1376 }
1377
1378 vma->vm_pgoff -= mmio_pgoff;
1379 start = info->fix.mmio_start;
1380 len = info->fix.mmio_len;
1381 }
1382 mutex_unlock(&info->mm_lock);
1383
1384 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
1385
1386
1387
1388
1389 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
1390 fb_pgprotect(file, vma, start);
1391
1392 return vm_iomap_memory(vma, start, len);
1393}
1394
1395static int
1396fb_open(struct inode *inode, struct file *file)
1397__acquires(&info->lock)
1398__releases(&info->lock)
1399{
1400 int fbidx = iminor(inode);
1401 struct fb_info *info;
1402 int res = 0;
1403
1404 info = get_fb_info(fbidx);
1405 if (!info) {
1406 request_module("fb%d", fbidx);
1407 info = get_fb_info(fbidx);
1408 if (!info)
1409 return -ENODEV;
1410 }
1411 if (IS_ERR(info))
1412 return PTR_ERR(info);
1413
1414 lock_fb_info(info);
1415 if (!try_module_get(info->fbops->owner)) {
1416 res = -ENODEV;
1417 goto out;
1418 }
1419 file->private_data = info;
1420 if (info->fbops->fb_open) {
1421 res = info->fbops->fb_open(info,1);
1422 if (res)
1423 module_put(info->fbops->owner);
1424 }
1425#ifdef CONFIG_FB_DEFERRED_IO
1426 if (info->fbdefio)
1427 fb_deferred_io_open(info, inode, file);
1428#endif
1429out:
1430 unlock_fb_info(info);
1431 if (res)
1432 put_fb_info(info);
1433 return res;
1434}
1435
1436static int
1437fb_release(struct inode *inode, struct file *file)
1438__acquires(&info->lock)
1439__releases(&info->lock)
1440{
1441 struct fb_info * const info = file->private_data;
1442
1443 lock_fb_info(info);
1444 if (info->fbops->fb_release)
1445 info->fbops->fb_release(info,1);
1446 module_put(info->fbops->owner);
1447 unlock_fb_info(info);
1448 put_fb_info(info);
1449 return 0;
1450}
1451
1452#if defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && !defined(CONFIG_MMU)
1453unsigned long get_fb_unmapped_area(struct file *filp,
1454 unsigned long addr, unsigned long len,
1455 unsigned long pgoff, unsigned long flags)
1456{
1457 struct fb_info * const info = filp->private_data;
1458 unsigned long fb_size = PAGE_ALIGN(info->fix.smem_len);
1459
1460 if (pgoff > fb_size || len > fb_size - pgoff)
1461 return -EINVAL;
1462
1463 return (unsigned long)info->screen_base + pgoff;
1464}
1465#endif
1466
1467static const struct file_operations fb_fops = {
1468 .owner = THIS_MODULE,
1469 .read = fb_read,
1470 .write = fb_write,
1471 .unlocked_ioctl = fb_ioctl,
1472#ifdef CONFIG_COMPAT
1473 .compat_ioctl = fb_compat_ioctl,
1474#endif
1475 .mmap = fb_mmap,
1476 .open = fb_open,
1477 .release = fb_release,
1478#if defined(HAVE_ARCH_FB_UNMAPPED_AREA) || \
1479 (defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && \
1480 !defined(CONFIG_MMU))
1481 .get_unmapped_area = get_fb_unmapped_area,
1482#endif
1483#ifdef CONFIG_FB_DEFERRED_IO
1484 .fsync = fb_deferred_io_fsync,
1485#endif
1486 .llseek = default_llseek,
1487};
1488
1489struct class *fb_class;
1490EXPORT_SYMBOL(fb_class);
1491
1492static int fb_check_foreignness(struct fb_info *fi)
1493{
1494 const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
1495
1496 fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
1497
1498#ifdef __BIG_ENDIAN
1499 fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
1500#else
1501 fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
1502#endif
1503
1504 if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
1505 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1506 "support this framebuffer\n", fi->fix.id);
1507 return -ENOSYS;
1508 } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
1509 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1510 "support this framebuffer\n", fi->fix.id);
1511 return -ENOSYS;
1512 }
1513
1514 return 0;
1515}
1516
1517static bool apertures_overlap(struct aperture *gen, struct aperture *hw)
1518{
1519
1520 if (gen->base == hw->base)
1521 return true;
1522
1523 if (gen->base > hw->base && gen->base < hw->base + hw->size)
1524 return true;
1525 return false;
1526}
1527
1528static bool fb_do_apertures_overlap(struct apertures_struct *gena,
1529 struct apertures_struct *hwa)
1530{
1531 int i, j;
1532 if (!hwa || !gena)
1533 return false;
1534
1535 for (i = 0; i < hwa->count; ++i) {
1536 struct aperture *h = &hwa->ranges[i];
1537 for (j = 0; j < gena->count; ++j) {
1538 struct aperture *g = &gena->ranges[j];
1539 printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n",
1540 (unsigned long long)g->base,
1541 (unsigned long long)g->size,
1542 (unsigned long long)h->base,
1543 (unsigned long long)h->size);
1544 if (apertures_overlap(g, h))
1545 return true;
1546 }
1547 }
1548
1549 return false;
1550}
1551
1552static void do_unregister_framebuffer(struct fb_info *fb_info);
1553
1554#define VGA_FB_PHYS 0xA0000
1555static void do_remove_conflicting_framebuffers(struct apertures_struct *a,
1556 const char *name, bool primary)
1557{
1558 int i;
1559
1560
1561 for_each_registered_fb(i) {
1562 struct apertures_struct *gen_aper;
1563
1564 if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE))
1565 continue;
1566
1567 gen_aper = registered_fb[i]->apertures;
1568 if (fb_do_apertures_overlap(gen_aper, a) ||
1569 (primary && gen_aper && gen_aper->count &&
1570 gen_aper->ranges[0].base == VGA_FB_PHYS)) {
1571
1572 printk(KERN_INFO "fb%d: switching to %s from %s\n",
1573 i, name, registered_fb[i]->fix.id);
1574 do_unregister_framebuffer(registered_fb[i]);
1575 }
1576 }
1577}
1578
1579static bool lockless_register_fb;
1580module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400);
1581MODULE_PARM_DESC(lockless_register_fb,
1582 "Lockless framebuffer registration for debugging [default=off]");
1583
1584static int do_register_framebuffer(struct fb_info *fb_info)
1585{
1586 int i, ret;
1587 struct fb_videomode mode;
1588
1589 if (fb_check_foreignness(fb_info))
1590 return -ENOSYS;
1591
1592 do_remove_conflicting_framebuffers(fb_info->apertures,
1593 fb_info->fix.id,
1594 fb_is_primary_device(fb_info));
1595
1596 if (num_registered_fb == FB_MAX)
1597 return -ENXIO;
1598
1599 num_registered_fb++;
1600 for (i = 0 ; i < FB_MAX; i++)
1601 if (!registered_fb[i])
1602 break;
1603 fb_info->node = i;
1604 atomic_set(&fb_info->count, 1);
1605 mutex_init(&fb_info->lock);
1606 mutex_init(&fb_info->mm_lock);
1607
1608 fb_info->dev = device_create(fb_class, fb_info->device,
1609 MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1610 if (IS_ERR(fb_info->dev)) {
1611
1612 printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1613 fb_info->dev = NULL;
1614 } else
1615 fb_init_device(fb_info);
1616
1617 if (fb_info->pixmap.addr == NULL) {
1618 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1619 if (fb_info->pixmap.addr) {
1620 fb_info->pixmap.size = FBPIXMAPSIZE;
1621 fb_info->pixmap.buf_align = 1;
1622 fb_info->pixmap.scan_align = 1;
1623 fb_info->pixmap.access_align = 32;
1624 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1625 }
1626 }
1627 fb_info->pixmap.offset = 0;
1628
1629 if (!fb_info->pixmap.blit_x)
1630 fb_info->pixmap.blit_x = ~(u32)0;
1631
1632 if (!fb_info->pixmap.blit_y)
1633 fb_info->pixmap.blit_y = ~(u32)0;
1634
1635 if (!fb_info->modelist.prev || !fb_info->modelist.next)
1636 INIT_LIST_HEAD(&fb_info->modelist);
1637
1638 if (fb_info->skip_vt_switch)
1639 pm_vt_switch_required(fb_info->dev, false);
1640 else
1641 pm_vt_switch_required(fb_info->dev, true);
1642
1643 fb_var_to_videomode(&mode, &fb_info->var);
1644 fb_add_videomode(&mode, &fb_info->modelist);
1645 registered_fb[i] = fb_info;
1646
1647#ifdef CONFIG_GUMSTIX_AM200EPD
1648 {
1649 struct fb_event event;
1650 event.info = fb_info;
1651 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
1652 }
1653#endif
1654
1655 if (!lockless_register_fb)
1656 console_lock();
1657 else
1658 atomic_inc(&ignore_console_lock_warning);
1659 lock_fb_info(fb_info);
1660 ret = fbcon_fb_registered(fb_info);
1661 unlock_fb_info(fb_info);
1662
1663 if (!lockless_register_fb)
1664 console_unlock();
1665 else
1666 atomic_dec(&ignore_console_lock_warning);
1667 return ret;
1668}
1669
1670static void unbind_console(struct fb_info *fb_info)
1671{
1672 int i = fb_info->node;
1673
1674 if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
1675 return;
1676
1677 console_lock();
1678 lock_fb_info(fb_info);
1679 fbcon_fb_unbind(fb_info);
1680 unlock_fb_info(fb_info);
1681 console_unlock();
1682}
1683
1684static void unlink_framebuffer(struct fb_info *fb_info)
1685{
1686 int i;
1687
1688 i = fb_info->node;
1689 if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
1690 return;
1691
1692 if (!fb_info->dev)
1693 return;
1694
1695 device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1696
1697 pm_vt_switch_unregister(fb_info->dev);
1698
1699 unbind_console(fb_info);
1700
1701 fb_info->dev = NULL;
1702}
1703
1704static void do_unregister_framebuffer(struct fb_info *fb_info)
1705{
1706 unlink_framebuffer(fb_info);
1707 if (fb_info->pixmap.addr &&
1708 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1709 kfree(fb_info->pixmap.addr);
1710 fb_destroy_modelist(&fb_info->modelist);
1711 registered_fb[fb_info->node] = NULL;
1712 num_registered_fb--;
1713 fb_cleanup_device(fb_info);
1714#ifdef CONFIG_GUMSTIX_AM200EPD
1715 {
1716 struct fb_event event;
1717 event.info = fb_info;
1718 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
1719 }
1720#endif
1721 console_lock();
1722 fbcon_fb_unregistered(fb_info);
1723 console_unlock();
1724
1725
1726 put_fb_info(fb_info);
1727}
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739int remove_conflicting_framebuffers(struct apertures_struct *a,
1740 const char *name, bool primary)
1741{
1742 bool do_free = false;
1743
1744 if (!a) {
1745 a = alloc_apertures(1);
1746 if (!a)
1747 return -ENOMEM;
1748
1749 a->ranges[0].base = 0;
1750 a->ranges[0].size = ~0;
1751 do_free = true;
1752 }
1753
1754 mutex_lock(®istration_lock);
1755 do_remove_conflicting_framebuffers(a, name, primary);
1756 mutex_unlock(®istration_lock);
1757
1758 if (do_free)
1759 kfree(a);
1760
1761 return 0;
1762}
1763EXPORT_SYMBOL(remove_conflicting_framebuffers);
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, const char *name)
1777{
1778 struct apertures_struct *ap;
1779 bool primary = false;
1780 int err, idx, bar;
1781
1782 for (idx = 0, bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
1783 if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM))
1784 continue;
1785 idx++;
1786 }
1787
1788 ap = alloc_apertures(idx);
1789 if (!ap)
1790 return -ENOMEM;
1791
1792 for (idx = 0, bar = 0; bar < PCI_STD_NUM_BARS; bar++) {
1793 if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM))
1794 continue;
1795 ap->ranges[idx].base = pci_resource_start(pdev, bar);
1796 ap->ranges[idx].size = pci_resource_len(pdev, bar);
1797 pci_dbg(pdev, "%s: bar %d: 0x%lx -> 0x%lx\n", __func__, bar,
1798 (unsigned long)pci_resource_start(pdev, bar),
1799 (unsigned long)pci_resource_end(pdev, bar));
1800 idx++;
1801 }
1802
1803#ifdef CONFIG_X86
1804 primary = pdev->resource[PCI_ROM_RESOURCE].flags &
1805 IORESOURCE_ROM_SHADOW;
1806#endif
1807 err = remove_conflicting_framebuffers(ap, name, primary);
1808 kfree(ap);
1809 return err;
1810}
1811EXPORT_SYMBOL(remove_conflicting_pci_framebuffers);
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822int
1823register_framebuffer(struct fb_info *fb_info)
1824{
1825 int ret;
1826
1827 mutex_lock(®istration_lock);
1828 ret = do_register_framebuffer(fb_info);
1829 mutex_unlock(®istration_lock);
1830
1831 return ret;
1832}
1833EXPORT_SYMBOL(register_framebuffer);
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851void
1852unregister_framebuffer(struct fb_info *fb_info)
1853{
1854 mutex_lock(®istration_lock);
1855 do_unregister_framebuffer(fb_info);
1856 mutex_unlock(®istration_lock);
1857}
1858EXPORT_SYMBOL(unregister_framebuffer);
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869void fb_set_suspend(struct fb_info *info, int state)
1870{
1871 WARN_CONSOLE_UNLOCKED();
1872
1873 if (state) {
1874 fbcon_suspended(info);
1875 info->state = FBINFO_STATE_SUSPENDED;
1876 } else {
1877 info->state = FBINFO_STATE_RUNNING;
1878 fbcon_resumed(info);
1879 }
1880}
1881EXPORT_SYMBOL(fb_set_suspend);
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892static int __init
1893fbmem_init(void)
1894{
1895 int ret;
1896
1897 if (!proc_create_seq("fb", 0, NULL, &proc_fb_seq_ops))
1898 return -ENOMEM;
1899
1900 ret = register_chrdev(FB_MAJOR, "fb", &fb_fops);
1901 if (ret) {
1902 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1903 goto err_chrdev;
1904 }
1905
1906 fb_class = class_create(THIS_MODULE, "graphics");
1907 if (IS_ERR(fb_class)) {
1908 ret = PTR_ERR(fb_class);
1909 pr_warn("Unable to create fb class; errno = %d\n", ret);
1910 fb_class = NULL;
1911 goto err_class;
1912 }
1913
1914 fb_console_init();
1915
1916 return 0;
1917
1918err_class:
1919 unregister_chrdev(FB_MAJOR, "fb");
1920err_chrdev:
1921 remove_proc_entry("fb", NULL);
1922 return ret;
1923}
1924
1925#ifdef MODULE
1926module_init(fbmem_init);
1927static void __exit
1928fbmem_exit(void)
1929{
1930 fb_console_exit();
1931
1932 remove_proc_entry("fb", NULL);
1933 class_destroy(fb_class);
1934 unregister_chrdev(FB_MAJOR, "fb");
1935}
1936
1937module_exit(fbmem_exit);
1938MODULE_LICENSE("GPL");
1939MODULE_DESCRIPTION("Framebuffer base");
1940#else
1941subsys_initcall(fbmem_init);
1942#endif
1943
1944int fb_new_modelist(struct fb_info *info)
1945{
1946 struct fb_var_screeninfo var = info->var;
1947 struct list_head *pos, *n;
1948 struct fb_modelist *modelist;
1949 struct fb_videomode *m, mode;
1950 int err;
1951
1952 list_for_each_safe(pos, n, &info->modelist) {
1953 modelist = list_entry(pos, struct fb_modelist, list);
1954 m = &modelist->mode;
1955 fb_videomode_to_var(&var, m);
1956 var.activate = FB_ACTIVATE_TEST;
1957 err = fb_set_var(info, &var);
1958 fb_var_to_videomode(&mode, &var);
1959 if (err || !fb_mode_is_equal(m, &mode)) {
1960 list_del(pos);
1961 kfree(pos);
1962 }
1963 }
1964
1965 if (list_empty(&info->modelist))
1966 return 1;
1967
1968 fbcon_new_modelist(info);
1969
1970 return 0;
1971}
1972
1973MODULE_LICENSE("GPL");
1974