1
2
3
4
5
6
7
8
9
10
11
12
13
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;
57EXPORT_SYMBOL(fb_center_logo);
58
59static struct fb_info *get_fb_info(unsigned int idx)
60{
61 struct fb_info *fb_info;
62
63 if (idx >= FB_MAX)
64 return ERR_PTR(-ENODEV);
65
66 mutex_lock(®istration_lock);
67 fb_info = registered_fb[idx];
68 if (fb_info)
69 atomic_inc(&fb_info->count);
70 mutex_unlock(®istration_lock);
71
72 return fb_info;
73}
74
75static void put_fb_info(struct fb_info *fb_info)
76{
77 if (!atomic_dec_and_test(&fb_info->count))
78 return;
79 if (fb_info->fbops->fb_destroy)
80 fb_info->fbops->fb_destroy(fb_info);
81}
82
83int lock_fb_info(struct fb_info *info)
84{
85 mutex_lock(&info->lock);
86 if (!info->fbops) {
87 mutex_unlock(&info->lock);
88 return 0;
89 }
90 return 1;
91}
92EXPORT_SYMBOL(lock_fb_info);
93
94
95
96
97
98int fb_get_color_depth(struct fb_var_screeninfo *var,
99 struct fb_fix_screeninfo *fix)
100{
101 int depth = 0;
102
103 if (fix->visual == FB_VISUAL_MONO01 ||
104 fix->visual == FB_VISUAL_MONO10)
105 depth = 1;
106 else {
107 if (var->green.length == var->blue.length &&
108 var->green.length == var->red.length &&
109 var->green.offset == var->blue.offset &&
110 var->green.offset == var->red.offset)
111 depth = var->green.length;
112 else
113 depth = var->green.length + var->red.length +
114 var->blue.length;
115 }
116
117 return depth;
118}
119EXPORT_SYMBOL(fb_get_color_depth);
120
121
122
123
124void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
125{
126 __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
127}
128EXPORT_SYMBOL(fb_pad_aligned_buffer);
129
130void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
131 u32 shift_high, u32 shift_low, u32 mod)
132{
133 u8 mask = (u8) (0xfff << shift_high), tmp;
134 int i, j;
135
136 for (i = height; i--; ) {
137 for (j = 0; j < idx; j++) {
138 tmp = dst[j];
139 tmp &= mask;
140 tmp |= *src >> shift_low;
141 dst[j] = tmp;
142 tmp = *src << shift_high;
143 dst[j+1] = tmp;
144 src++;
145 }
146 tmp = dst[idx];
147 tmp &= mask;
148 tmp |= *src >> shift_low;
149 dst[idx] = tmp;
150 if (shift_high < mod) {
151 tmp = *src << shift_high;
152 dst[idx+1] = tmp;
153 }
154 src++;
155 dst += d_pitch;
156 }
157}
158EXPORT_SYMBOL(fb_pad_unaligned_buffer);
159
160
161
162
163
164char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
165{
166 u32 align = buf->buf_align - 1, offset;
167 char *addr = buf->addr;
168
169
170
171
172 if (buf->flags & FB_PIXMAP_IO) {
173 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
174 info->fbops->fb_sync(info);
175 return addr;
176 }
177
178
179 offset = buf->offset + align;
180 offset &= ~align;
181 if (offset + size > buf->size) {
182
183
184
185
186 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
187 info->fbops->fb_sync(info);
188 offset = 0;
189 }
190 buf->offset = offset + size;
191 addr += offset;
192
193 return addr;
194}
195EXPORT_SYMBOL(fb_get_buffer_offset);
196
197#ifdef CONFIG_LOGO
198
199static inline unsigned safe_shift(unsigned d, int n)
200{
201 return n < 0 ? d >> -n : d << n;
202}
203
204static void fb_set_logocmap(struct fb_info *info,
205 const struct linux_logo *logo)
206{
207 struct fb_cmap palette_cmap;
208 u16 palette_green[16];
209 u16 palette_blue[16];
210 u16 palette_red[16];
211 int i, j, n;
212 const unsigned char *clut = logo->clut;
213
214 palette_cmap.start = 0;
215 palette_cmap.len = 16;
216 palette_cmap.red = palette_red;
217 palette_cmap.green = palette_green;
218 palette_cmap.blue = palette_blue;
219 palette_cmap.transp = NULL;
220
221 for (i = 0; i < logo->clutsize; i += n) {
222 n = logo->clutsize - i;
223
224 if (n > 16)
225 n = 16;
226 palette_cmap.start = 32 + i;
227 palette_cmap.len = n;
228 for (j = 0; j < n; ++j) {
229 palette_cmap.red[j] = clut[0] << 8 | clut[0];
230 palette_cmap.green[j] = clut[1] << 8 | clut[1];
231 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
232 clut += 3;
233 }
234 fb_set_cmap(&palette_cmap, info);
235 }
236}
237
238static void fb_set_logo_truepalette(struct fb_info *info,
239 const struct linux_logo *logo,
240 u32 *palette)
241{
242 static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
243 unsigned char redmask, greenmask, bluemask;
244 int redshift, greenshift, blueshift;
245 int i;
246 const unsigned char *clut = logo->clut;
247
248
249
250
251
252
253 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
254 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
255 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
256 redshift = info->var.red.offset - (8 - info->var.red.length);
257 greenshift = info->var.green.offset - (8 - info->var.green.length);
258 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
259
260 for ( i = 0; i < logo->clutsize; i++) {
261 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
262 safe_shift((clut[1] & greenmask), greenshift) |
263 safe_shift((clut[2] & bluemask), blueshift));
264 clut += 3;
265 }
266}
267
268static void fb_set_logo_directpalette(struct fb_info *info,
269 const struct linux_logo *logo,
270 u32 *palette)
271{
272 int redshift, greenshift, blueshift;
273 int i;
274
275 redshift = info->var.red.offset;
276 greenshift = info->var.green.offset;
277 blueshift = info->var.blue.offset;
278
279 for (i = 32; i < 32 + logo->clutsize; i++)
280 palette[i] = i << redshift | i << greenshift | i << blueshift;
281}
282
283static void fb_set_logo(struct fb_info *info,
284 const struct linux_logo *logo, u8 *dst,
285 int depth)
286{
287 int i, j, k;
288 const u8 *src = logo->data;
289 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
290 u8 fg = 1, d;
291
292 switch (fb_get_color_depth(&info->var, &info->fix)) {
293 case 1:
294 fg = 1;
295 break;
296 case 2:
297 fg = 3;
298 break;
299 default:
300 fg = 7;
301 break;
302 }
303
304 if (info->fix.visual == FB_VISUAL_MONO01 ||
305 info->fix.visual == FB_VISUAL_MONO10)
306 fg = ~((u8) (0xfff << info->var.green.length));
307
308 switch (depth) {
309 case 4:
310 for (i = 0; i < logo->height; i++)
311 for (j = 0; j < logo->width; src++) {
312 *dst++ = *src >> 4;
313 j++;
314 if (j < logo->width) {
315 *dst++ = *src & 0x0f;
316 j++;
317 }
318 }
319 break;
320 case 1:
321 for (i = 0; i < logo->height; i++) {
322 for (j = 0; j < logo->width; src++) {
323 d = *src ^ xor;
324 for (k = 7; k >= 0 && j < logo->width; k--) {
325 *dst++ = ((d >> k) & 1) ? fg : 0;
326 j++;
327 }
328 }
329 }
330 break;
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
360static struct logo_data {
361 int depth;
362 int needs_directpalette;
363 int needs_truepalette;
364 int needs_cmapreset;
365 const struct linux_logo *logo;
366} fb_logo __read_mostly;
367
368static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
369{
370 u32 size = width * height, i;
371
372 out += size - 1;
373
374 for (i = size; i--; )
375 *out-- = *in++;
376}
377
378static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
379{
380 int i, j, h = height - 1;
381
382 for (i = 0; i < height; i++)
383 for (j = 0; j < width; j++)
384 out[height * j + h - i] = *in++;
385}
386
387static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
388{
389 int i, j, w = width - 1;
390
391 for (i = 0; i < height; i++)
392 for (j = 0; j < width; j++)
393 out[height * (w - j) + i] = *in++;
394}
395
396static void fb_rotate_logo(struct fb_info *info, u8 *dst,
397 struct fb_image *image, int rotate)
398{
399 u32 tmp;
400
401 if (rotate == FB_ROTATE_UD) {
402 fb_rotate_logo_ud(image->data, dst, image->width,
403 image->height);
404 image->dx = info->var.xres - image->width - image->dx;
405 image->dy = info->var.yres - image->height - image->dy;
406 } else if (rotate == FB_ROTATE_CW) {
407 fb_rotate_logo_cw(image->data, dst, image->width,
408 image->height);
409 tmp = image->width;
410 image->width = image->height;
411 image->height = tmp;
412 tmp = image->dy;
413 image->dy = image->dx;
414 image->dx = info->var.xres - image->width - tmp;
415 } else if (rotate == FB_ROTATE_CCW) {
416 fb_rotate_logo_ccw(image->data, dst, image->width,
417 image->height);
418 tmp = image->width;
419 image->width = image->height;
420 image->height = tmp;
421 tmp = image->dx;
422 image->dx = image->dy;
423 image->dy = info->var.yres - image->height - tmp;
424 }
425
426 image->data = dst;
427}
428
429static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
430 int rotate, unsigned int num)
431{
432 unsigned int x;
433
434 if (image->width > info->var.xres || image->height > info->var.yres)
435 return;
436
437 if (rotate == FB_ROTATE_UR) {
438 for (x = 0;
439 x < num && image->dx + image->width <= info->var.xres;
440 x++) {
441 info->fbops->fb_imageblit(info, image);
442 image->dx += image->width + 8;
443 }
444 } else if (rotate == FB_ROTATE_UD) {
445 u32 dx = image->dx;
446
447 for (x = 0; x < num && image->dx <= dx; x++) {
448 info->fbops->fb_imageblit(info, image);
449 image->dx -= image->width + 8;
450 }
451 } else if (rotate == FB_ROTATE_CW) {
452 for (x = 0;
453 x < num && image->dy + image->height <= info->var.yres;
454 x++) {
455 info->fbops->fb_imageblit(info, image);
456 image->dy += image->height + 8;
457 }
458 } else if (rotate == FB_ROTATE_CCW) {
459 u32 dy = image->dy;
460
461 for (x = 0; x < num && image->dy <= dy; x++) {
462 info->fbops->fb_imageblit(info, image);
463 image->dy -= image->height + 8;
464 }
465 }
466}
467
468static int fb_show_logo_line(struct fb_info *info, int rotate,
469 const struct linux_logo *logo, int y,
470 unsigned int n)
471{
472 u32 *palette = NULL, *saved_pseudo_palette = NULL;
473 unsigned char *logo_new = NULL, *logo_rotate = NULL;
474 struct fb_image image;
475
476
477 if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
478 info->fbops->owner)
479 return 0;
480
481 image.depth = 8;
482 image.data = logo->data;
483
484 if (fb_logo.needs_cmapreset)
485 fb_set_logocmap(info, logo);
486
487 if (fb_logo.needs_truepalette ||
488 fb_logo.needs_directpalette) {
489 palette = kmalloc(256 * 4, GFP_KERNEL);
490 if (palette == NULL)
491 return 0;
492
493 if (fb_logo.needs_truepalette)
494 fb_set_logo_truepalette(info, logo, palette);
495 else
496 fb_set_logo_directpalette(info, logo, palette);
497
498 saved_pseudo_palette = info->pseudo_palette;
499 info->pseudo_palette = palette;
500 }
501
502 if (fb_logo.depth <= 4) {
503 logo_new = kmalloc_array(logo->width, logo->height,
504 GFP_KERNEL);
505 if (logo_new == NULL) {
506 kfree(palette);
507 if (saved_pseudo_palette)
508 info->pseudo_palette = saved_pseudo_palette;
509 return 0;
510 }
511 image.data = logo_new;
512 fb_set_logo(info, logo, logo_new, fb_logo.depth);
513 }
514
515 if (fb_center_logo) {
516 int xres = info->var.xres;
517 int yres = info->var.yres;
518
519 if (rotate == FB_ROTATE_CW || rotate == FB_ROTATE_CCW) {
520 xres = info->var.yres;
521 yres = info->var.xres;
522 }
523
524 while (n && (n * (logo->width + 8) - 8 > xres))
525 --n;
526 image.dx = (xres - n * (logo->width + 8) - 8) / 2;
527 image.dy = y ?: (yres - logo->height) / 2;
528 } else {
529 image.dx = 0;
530 image.dy = y;
531 }
532
533 image.width = logo->width;
534 image.height = logo->height;
535
536 if (rotate) {
537 logo_rotate = kmalloc_array(logo->width, logo->height,
538 GFP_KERNEL);
539 if (logo_rotate)
540 fb_rotate_logo(info, logo_rotate, &image, rotate);
541 }
542
543 fb_do_show_logo(info, &image, rotate, n);
544
545 kfree(palette);
546 if (saved_pseudo_palette != NULL)
547 info->pseudo_palette = saved_pseudo_palette;
548 kfree(logo_new);
549 kfree(logo_rotate);
550 return image.dy + logo->height;
551}
552
553
554#ifdef CONFIG_FB_LOGO_EXTRA
555
556#define FB_LOGO_EX_NUM_MAX 10
557static struct logo_data_extra {
558 const struct linux_logo *logo;
559 unsigned int n;
560} fb_logo_ex[FB_LOGO_EX_NUM_MAX];
561static unsigned int fb_logo_ex_num;
562
563void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
564{
565 if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
566 return;
567
568 fb_logo_ex[fb_logo_ex_num].logo = logo;
569 fb_logo_ex[fb_logo_ex_num].n = n;
570 fb_logo_ex_num++;
571}
572
573static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
574 unsigned int yres)
575{
576 unsigned int i;
577
578
579 if (info->fix.visual != FB_VISUAL_TRUECOLOR)
580 fb_logo_ex_num = 0;
581
582 for (i = 0; i < fb_logo_ex_num; i++) {
583 if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
584 fb_logo_ex[i].logo = NULL;
585 continue;
586 }
587 height += fb_logo_ex[i].logo->height;
588 if (height > yres) {
589 height -= fb_logo_ex[i].logo->height;
590 fb_logo_ex_num = i;
591 break;
592 }
593 }
594 return height;
595}
596
597static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
598{
599 unsigned int i;
600
601 for (i = 0; i < fb_logo_ex_num; i++)
602 y = fb_show_logo_line(info, rotate,
603 fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
604
605 return y;
606}
607
608#else
609
610static inline int fb_prepare_extra_logos(struct fb_info *info,
611 unsigned int height,
612 unsigned int yres)
613{
614 return height;
615}
616
617static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
618{
619 return y;
620}
621
622#endif
623
624
625int fb_prepare_logo(struct fb_info *info, int rotate)
626{
627 int depth = fb_get_color_depth(&info->var, &info->fix);
628 unsigned int yres;
629 int height;
630
631 memset(&fb_logo, 0, sizeof(struct logo_data));
632
633 if (info->flags & FBINFO_MISC_TILEBLITTING ||
634 info->fbops->owner)
635 return 0;
636
637 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
638 depth = info->var.blue.length;
639 if (info->var.red.length < depth)
640 depth = info->var.red.length;
641 if (info->var.green.length < depth)
642 depth = info->var.green.length;
643 }
644
645 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
646
647 depth = 4;
648 }
649
650
651 fb_logo.logo = fb_find_logo(depth);
652
653 if (!fb_logo.logo) {
654 return 0;
655 }
656
657 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
658 yres = info->var.yres;
659 else
660 yres = info->var.xres;
661
662 if (fb_logo.logo->height > yres) {
663 fb_logo.logo = NULL;
664 return 0;
665 }
666
667
668 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
669 fb_logo.depth = 8;
670 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
671 fb_logo.depth = 4;
672 else
673 fb_logo.depth = 1;
674
675
676 if (fb_logo.depth > 4 && depth > 4) {
677 switch (info->fix.visual) {
678 case FB_VISUAL_TRUECOLOR:
679 fb_logo.needs_truepalette = 1;
680 break;
681 case FB_VISUAL_DIRECTCOLOR:
682 fb_logo.needs_directpalette = 1;
683 fb_logo.needs_cmapreset = 1;
684 break;
685 case FB_VISUAL_PSEUDOCOLOR:
686 fb_logo.needs_cmapreset = 1;
687 break;
688 }
689 }
690
691 height = fb_logo.logo->height;
692 if (fb_center_logo)
693 height += (yres - fb_logo.logo->height) / 2;
694
695 return fb_prepare_extra_logos(info, height, yres);
696}
697
698int fb_show_logo(struct fb_info *info, int rotate)
699{
700 int y;
701
702 y = fb_show_logo_line(info, rotate, fb_logo.logo, 0,
703 num_online_cpus());
704 y = fb_show_extra_logos(info, y, rotate);
705
706 return y;
707}
708#else
709int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
710int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
711#endif
712EXPORT_SYMBOL(fb_prepare_logo);
713EXPORT_SYMBOL(fb_show_logo);
714
715static void *fb_seq_start(struct seq_file *m, loff_t *pos)
716{
717 mutex_lock(®istration_lock);
718 return (*pos < FB_MAX) ? pos : NULL;
719}
720
721static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
722{
723 (*pos)++;
724 return (*pos < FB_MAX) ? pos : NULL;
725}
726
727static void fb_seq_stop(struct seq_file *m, void *v)
728{
729 mutex_unlock(®istration_lock);
730}
731
732static int fb_seq_show(struct seq_file *m, void *v)
733{
734 int i = *(loff_t *)v;
735 struct fb_info *fi = registered_fb[i];
736
737 if (fi)
738 seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
739 return 0;
740}
741
742static const struct seq_operations proc_fb_seq_ops = {
743 .start = fb_seq_start,
744 .next = fb_seq_next,
745 .stop = fb_seq_stop,
746 .show = fb_seq_show,
747};
748
749
750
751
752
753
754
755
756
757static struct fb_info *file_fb_info(struct file *file)
758{
759 struct inode *inode = file_inode(file);
760 int fbidx = iminor(inode);
761 struct fb_info *info = registered_fb[fbidx];
762
763 if (info != file->private_data)
764 info = NULL;
765 return info;
766}
767
768static ssize_t
769fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
770{
771 unsigned long p = *ppos;
772 struct fb_info *info = file_fb_info(file);
773 u8 *buffer, *dst;
774 u8 __iomem *src;
775 int c, cnt = 0, err = 0;
776 unsigned long total_size;
777
778 if (!info || ! info->screen_base)
779 return -ENODEV;
780
781 if (info->state != FBINFO_STATE_RUNNING)
782 return -EPERM;
783
784 if (info->fbops->fb_read)
785 return info->fbops->fb_read(info, buf, count, ppos);
786
787 total_size = info->screen_size;
788
789 if (total_size == 0)
790 total_size = info->fix.smem_len;
791
792 if (p >= total_size)
793 return 0;
794
795 if (count >= total_size)
796 count = total_size;
797
798 if (count + p > total_size)
799 count = total_size - p;
800
801 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
802 GFP_KERNEL);
803 if (!buffer)
804 return -ENOMEM;
805
806 src = (u8 __iomem *) (info->screen_base + p);
807
808 if (info->fbops->fb_sync)
809 info->fbops->fb_sync(info);
810
811 while (count) {
812 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
813 dst = buffer;
814 fb_memcpy_fromfb(dst, src, c);
815 dst += c;
816 src += c;
817
818 if (copy_to_user(buf, buffer, c)) {
819 err = -EFAULT;
820 break;
821 }
822 *ppos += c;
823 buf += c;
824 cnt += c;
825 count -= c;
826 }
827
828 kfree(buffer);
829
830 return (err) ? err : cnt;
831}
832
833static ssize_t
834fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
835{
836 unsigned long p = *ppos;
837 struct fb_info *info = file_fb_info(file);
838 u8 *buffer, *src;
839 u8 __iomem *dst;
840 int c, cnt = 0, err = 0;
841 unsigned long total_size;
842
843 if (!info || !info->screen_base)
844 return -ENODEV;
845
846 if (info->state != FBINFO_STATE_RUNNING)
847 return -EPERM;
848
849 if (info->fbops->fb_write)
850 return info->fbops->fb_write(info, buf, count, ppos);
851
852 total_size = info->screen_size;
853
854 if (total_size == 0)
855 total_size = info->fix.smem_len;
856
857 if (p > total_size)
858 return -EFBIG;
859
860 if (count > total_size) {
861 err = -EFBIG;
862 count = total_size;
863 }
864
865 if (count + p > total_size) {
866 if (!err)
867 err = -ENOSPC;
868
869 count = total_size - p;
870 }
871
872 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
873 GFP_KERNEL);
874 if (!buffer)
875 return -ENOMEM;
876
877 dst = (u8 __iomem *) (info->screen_base + p);
878
879 if (info->fbops->fb_sync)
880 info->fbops->fb_sync(info);
881
882 while (count) {
883 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
884 src = buffer;
885
886 if (copy_from_user(src, buf, c)) {
887 err = -EFAULT;
888 break;
889 }
890
891 fb_memcpy_tofb(dst, src, c);
892 dst += c;
893 src += c;
894 *ppos += c;
895 buf += c;
896 cnt += c;
897 count -= c;
898 }
899
900 kfree(buffer);
901
902 return (cnt) ? cnt : err;
903}
904
905int
906fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
907{
908 struct fb_fix_screeninfo *fix = &info->fix;
909 unsigned int yres = info->var.yres;
910 int err = 0;
911
912 if (var->yoffset > 0) {
913 if (var->vmode & FB_VMODE_YWRAP) {
914 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
915 err = -EINVAL;
916 else
917 yres = 0;
918 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
919 err = -EINVAL;
920 }
921
922 if (var->xoffset > 0 && (!fix->xpanstep ||
923 (var->xoffset % fix->xpanstep)))
924 err = -EINVAL;
925
926 if (err || !info->fbops->fb_pan_display ||
927 var->yoffset > info->var.yres_virtual - yres ||
928 var->xoffset > info->var.xres_virtual - info->var.xres)
929 return -EINVAL;
930
931 if ((err = info->fbops->fb_pan_display(var, info)))
932 return err;
933 info->var.xoffset = var->xoffset;
934 info->var.yoffset = var->yoffset;
935 if (var->vmode & FB_VMODE_YWRAP)
936 info->var.vmode |= FB_VMODE_YWRAP;
937 else
938 info->var.vmode &= ~FB_VMODE_YWRAP;
939 return 0;
940}
941EXPORT_SYMBOL(fb_pan_display);
942
943static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
944 u32 activate)
945{
946 struct fb_event event;
947 struct fb_blit_caps caps, fbcaps;
948 int err = 0;
949
950 memset(&caps, 0, sizeof(caps));
951 memset(&fbcaps, 0, sizeof(fbcaps));
952 caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
953 event.info = info;
954 event.data = ∩︀
955 fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
956 info->fbops->fb_get_caps(info, &fbcaps, var);
957
958 if (((fbcaps.x ^ caps.x) & caps.x) ||
959 ((fbcaps.y ^ caps.y) & caps.y) ||
960 (fbcaps.len < caps.len))
961 err = -EINVAL;
962
963 return err;
964}
965
966int
967fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
968{
969 int flags = info->flags;
970 int ret = 0;
971
972 if (var->activate & FB_ACTIVATE_INV_MODE) {
973 struct fb_videomode mode1, mode2;
974
975 fb_var_to_videomode(&mode1, var);
976 fb_var_to_videomode(&mode2, &info->var);
977
978 ret = fb_mode_is_equal(&mode1, &mode2);
979
980 if (!ret) {
981 struct fb_event event;
982
983 event.info = info;
984 event.data = &mode1;
985 ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
986 }
987
988 if (!ret)
989 fb_delete_videomode(&mode1, &info->modelist);
990
991
992 ret = (ret) ? -EINVAL : 0;
993 goto done;
994 }
995
996 if ((var->activate & FB_ACTIVATE_FORCE) ||
997 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
998 u32 activate = var->activate;
999
1000
1001
1002
1003 if ((info->fix.capabilities & FB_CAP_FOURCC) &&
1004 var->grayscale > 1) {
1005 if (var->red.offset || var->green.offset ||
1006 var->blue.offset || var->transp.offset ||
1007 var->red.length || var->green.length ||
1008 var->blue.length || var->transp.length ||
1009 var->red.msb_right || var->green.msb_right ||
1010 var->blue.msb_right || var->transp.msb_right)
1011 return -EINVAL;
1012 }
1013
1014 if (!info->fbops->fb_check_var) {
1015 *var = info->var;
1016 goto done;
1017 }
1018
1019 ret = info->fbops->fb_check_var(var, info);
1020
1021 if (ret)
1022 goto done;
1023
1024 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
1025 struct fb_var_screeninfo old_var;
1026 struct fb_videomode mode;
1027
1028 if (info->fbops->fb_get_caps) {
1029 ret = fb_check_caps(info, var, activate);
1030
1031 if (ret)
1032 goto done;
1033 }
1034
1035 old_var = info->var;
1036 info->var = *var;
1037
1038 if (info->fbops->fb_set_par) {
1039 ret = info->fbops->fb_set_par(info);
1040
1041 if (ret) {
1042 info->var = old_var;
1043 printk(KERN_WARNING "detected "
1044 "fb_set_par error, "
1045 "error code: %d\n", ret);
1046 goto done;
1047 }
1048 }
1049
1050 fb_pan_display(info, &info->var);
1051 fb_set_cmap(&info->cmap, info);
1052 fb_var_to_videomode(&mode, &info->var);
1053
1054 if (info->modelist.prev && info->modelist.next &&
1055 !list_empty(&info->modelist))
1056 ret = fb_add_videomode(&mode, &info->modelist);
1057
1058 if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
1059 struct fb_event event;
1060 int evnt = (activate & FB_ACTIVATE_ALL) ?
1061 FB_EVENT_MODE_CHANGE_ALL :
1062 FB_EVENT_MODE_CHANGE;
1063
1064 info->flags &= ~FBINFO_MISC_USEREVENT;
1065 event.info = info;
1066 event.data = &mode;
1067 fb_notifier_call_chain(evnt, &event);
1068 }
1069 }
1070 }
1071
1072 done:
1073 return ret;
1074}
1075EXPORT_SYMBOL(fb_set_var);
1076
1077int
1078fb_blank(struct fb_info *info, int blank)
1079{
1080 struct fb_event event;
1081 int ret = -EINVAL, early_ret;
1082
1083 if (blank > FB_BLANK_POWERDOWN)
1084 blank = FB_BLANK_POWERDOWN;
1085
1086 event.info = info;
1087 event.data = ␣
1088
1089 early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
1090
1091 if (info->fbops->fb_blank)
1092 ret = info->fbops->fb_blank(blank, info);
1093
1094 if (!ret)
1095 fb_notifier_call_chain(FB_EVENT_BLANK, &event);
1096 else {
1097
1098
1099
1100
1101 if (!early_ret)
1102 fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK, &event);
1103 }
1104
1105 return ret;
1106}
1107EXPORT_SYMBOL(fb_blank);
1108
1109static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
1110 unsigned long arg)
1111{
1112 struct fb_ops *fb;
1113 struct fb_var_screeninfo var;
1114 struct fb_fix_screeninfo fix;
1115 struct fb_con2fbmap con2fb;
1116 struct fb_cmap cmap_from;
1117 struct fb_cmap_user cmap;
1118 struct fb_event event;
1119 void __user *argp = (void __user *)arg;
1120 long ret = 0;
1121
1122 switch (cmd) {
1123 case FBIOGET_VSCREENINFO:
1124 if (!lock_fb_info(info))
1125 return -ENODEV;
1126 var = info->var;
1127 unlock_fb_info(info);
1128
1129 ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0;
1130 break;
1131 case FBIOPUT_VSCREENINFO:
1132 if (copy_from_user(&var, argp, sizeof(var)))
1133 return -EFAULT;
1134 console_lock();
1135 if (!lock_fb_info(info)) {
1136 console_unlock();
1137 return -ENODEV;
1138 }
1139 info->flags |= FBINFO_MISC_USEREVENT;
1140 ret = fb_set_var(info, &var);
1141 info->flags &= ~FBINFO_MISC_USEREVENT;
1142 unlock_fb_info(info);
1143 console_unlock();
1144 if (!ret && copy_to_user(argp, &var, sizeof(var)))
1145 ret = -EFAULT;
1146 break;
1147 case FBIOGET_FSCREENINFO:
1148 if (!lock_fb_info(info))
1149 return -ENODEV;
1150 fix = info->fix;
1151 if (info->flags & FBINFO_HIDE_SMEM_START)
1152 fix.smem_start = 0;
1153 unlock_fb_info(info);
1154
1155 ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0;
1156 break;
1157 case FBIOPUTCMAP:
1158 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1159 return -EFAULT;
1160 ret = fb_set_user_cmap(&cmap, info);
1161 break;
1162 case FBIOGETCMAP:
1163 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1164 return -EFAULT;
1165 if (!lock_fb_info(info))
1166 return -ENODEV;
1167 cmap_from = info->cmap;
1168 unlock_fb_info(info);
1169 ret = fb_cmap_to_user(&cmap_from, &cmap);
1170 break;
1171 case FBIOPAN_DISPLAY:
1172 if (copy_from_user(&var, argp, sizeof(var)))
1173 return -EFAULT;
1174 console_lock();
1175 if (!lock_fb_info(info)) {
1176 console_unlock();
1177 return -ENODEV;
1178 }
1179 ret = fb_pan_display(info, &var);
1180 unlock_fb_info(info);
1181 console_unlock();
1182 if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
1183 return -EFAULT;
1184 break;
1185 case FBIO_CURSOR:
1186 ret = -EINVAL;
1187 break;
1188 case FBIOGET_CON2FBMAP:
1189 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1190 return -EFAULT;
1191 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1192 return -EINVAL;
1193 con2fb.framebuffer = -1;
1194 event.data = &con2fb;
1195 if (!lock_fb_info(info))
1196 return -ENODEV;
1197 event.info = info;
1198 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
1199 unlock_fb_info(info);
1200 ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
1201 break;
1202 case FBIOPUT_CON2FBMAP:
1203 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1204 return -EFAULT;
1205 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1206 return -EINVAL;
1207 if (con2fb.framebuffer >= FB_MAX)
1208 return -EINVAL;
1209 if (!registered_fb[con2fb.framebuffer])
1210 request_module("fb%d", con2fb.framebuffer);
1211 if (!registered_fb[con2fb.framebuffer]) {
1212 ret = -EINVAL;
1213 break;
1214 }
1215 event.data = &con2fb;
1216 console_lock();
1217 if (!lock_fb_info(info)) {
1218 console_unlock();
1219 return -ENODEV;
1220 }
1221 event.info = info;
1222 ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
1223 unlock_fb_info(info);
1224 console_unlock();
1225 break;
1226 case FBIOBLANK:
1227 console_lock();
1228 if (!lock_fb_info(info)) {
1229 console_unlock();
1230 return -ENODEV;
1231 }
1232 info->flags |= FBINFO_MISC_USEREVENT;
1233 ret = fb_blank(info, arg);
1234 info->flags &= ~FBINFO_MISC_USEREVENT;
1235 unlock_fb_info(info);
1236 console_unlock();
1237 break;
1238 default:
1239 if (!lock_fb_info(info))
1240 return -ENODEV;
1241 fb = info->fbops;
1242 if (fb->fb_ioctl)
1243 ret = fb->fb_ioctl(info, cmd, arg);
1244 else
1245 ret = -ENOTTY;
1246 unlock_fb_info(info);
1247 }
1248 return ret;
1249}
1250
1251static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1252{
1253 struct fb_info *info = file_fb_info(file);
1254
1255 if (!info)
1256 return -ENODEV;
1257 return do_fb_ioctl(info, cmd, arg);
1258}
1259
1260#ifdef CONFIG_COMPAT
1261struct fb_fix_screeninfo32 {
1262 char id[16];
1263 compat_caddr_t smem_start;
1264 u32 smem_len;
1265 u32 type;
1266 u32 type_aux;
1267 u32 visual;
1268 u16 xpanstep;
1269 u16 ypanstep;
1270 u16 ywrapstep;
1271 u32 line_length;
1272 compat_caddr_t mmio_start;
1273 u32 mmio_len;
1274 u32 accel;
1275 u16 reserved[3];
1276};
1277
1278struct fb_cmap32 {
1279 u32 start;
1280 u32 len;
1281 compat_caddr_t red;
1282 compat_caddr_t green;
1283 compat_caddr_t blue;
1284 compat_caddr_t transp;
1285};
1286
1287static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
1288 unsigned long arg)
1289{
1290 struct fb_cmap_user __user *cmap;
1291 struct fb_cmap32 __user *cmap32;
1292 __u32 data;
1293 int err;
1294
1295 cmap = compat_alloc_user_space(sizeof(*cmap));
1296 cmap32 = compat_ptr(arg);
1297
1298 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1299 return -EFAULT;
1300
1301 if (get_user(data, &cmap32->red) ||
1302 put_user(compat_ptr(data), &cmap->red) ||
1303 get_user(data, &cmap32->green) ||
1304 put_user(compat_ptr(data), &cmap->green) ||
1305 get_user(data, &cmap32->blue) ||
1306 put_user(compat_ptr(data), &cmap->blue) ||
1307 get_user(data, &cmap32->transp) ||
1308 put_user(compat_ptr(data), &cmap->transp))
1309 return -EFAULT;
1310
1311 err = do_fb_ioctl(info, cmd, (unsigned long) cmap);
1312
1313 if (!err) {
1314 if (copy_in_user(&cmap32->start,
1315 &cmap->start,
1316 2 * sizeof(__u32)))
1317 err = -EFAULT;
1318 }
1319 return err;
1320}
1321
1322static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1323 struct fb_fix_screeninfo32 __user *fix32)
1324{
1325 __u32 data;
1326 int err;
1327
1328 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1329
1330 data = (__u32) (unsigned long) fix->smem_start;
1331 err |= put_user(data, &fix32->smem_start);
1332
1333 err |= put_user(fix->smem_len, &fix32->smem_len);
1334 err |= put_user(fix->type, &fix32->type);
1335 err |= put_user(fix->type_aux, &fix32->type_aux);
1336 err |= put_user(fix->visual, &fix32->visual);
1337 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1338 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1339 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1340 err |= put_user(fix->line_length, &fix32->line_length);
1341
1342 data = (__u32) (unsigned long) fix->mmio_start;
1343 err |= put_user(data, &fix32->mmio_start);
1344
1345 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1346 err |= put_user(fix->accel, &fix32->accel);
1347 err |= copy_to_user(fix32->reserved, fix->reserved,
1348 sizeof(fix->reserved));
1349
1350 if (err)
1351 return -EFAULT;
1352 return 0;
1353}
1354
1355static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
1356 unsigned long arg)
1357{
1358 struct fb_fix_screeninfo fix;
1359
1360 if (!lock_fb_info(info))
1361 return -ENODEV;
1362 fix = info->fix;
1363 if (info->flags & FBINFO_HIDE_SMEM_START)
1364 fix.smem_start = 0;
1365 unlock_fb_info(info);
1366 return do_fscreeninfo_to_user(&fix, compat_ptr(arg));
1367}
1368
1369static long fb_compat_ioctl(struct file *file, unsigned int cmd,
1370 unsigned long arg)
1371{
1372 struct fb_info *info = file_fb_info(file);
1373 struct fb_ops *fb;
1374 long ret = -ENOIOCTLCMD;
1375
1376 if (!info)
1377 return -ENODEV;
1378 fb = info->fbops;
1379 switch(cmd) {
1380 case FBIOGET_VSCREENINFO:
1381 case FBIOPUT_VSCREENINFO:
1382 case FBIOPAN_DISPLAY:
1383 case FBIOGET_CON2FBMAP:
1384 case FBIOPUT_CON2FBMAP:
1385 arg = (unsigned long) compat_ptr(arg);
1386
1387 case FBIOBLANK:
1388 ret = do_fb_ioctl(info, cmd, arg);
1389 break;
1390
1391 case FBIOGET_FSCREENINFO:
1392 ret = fb_get_fscreeninfo(info, cmd, arg);
1393 break;
1394
1395 case FBIOGETCMAP:
1396 case FBIOPUTCMAP:
1397 ret = fb_getput_cmap(info, cmd, arg);
1398 break;
1399
1400 default:
1401 if (fb->fb_compat_ioctl)
1402 ret = fb->fb_compat_ioctl(info, cmd, arg);
1403 break;
1404 }
1405 return ret;
1406}
1407#endif
1408
1409static int
1410fb_mmap(struct file *file, struct vm_area_struct * vma)
1411{
1412 struct fb_info *info = file_fb_info(file);
1413 struct fb_ops *fb;
1414 unsigned long mmio_pgoff;
1415 unsigned long start;
1416 u32 len;
1417
1418 if (!info)
1419 return -ENODEV;
1420 fb = info->fbops;
1421 if (!fb)
1422 return -ENODEV;
1423 mutex_lock(&info->mm_lock);
1424 if (fb->fb_mmap) {
1425 int res;
1426
1427
1428
1429
1430
1431 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
1432 res = fb->fb_mmap(info, vma);
1433 mutex_unlock(&info->mm_lock);
1434 return res;
1435 }
1436
1437
1438
1439
1440
1441 start = info->fix.smem_start;
1442 len = info->fix.smem_len;
1443 mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT;
1444 if (vma->vm_pgoff >= mmio_pgoff) {
1445 if (info->var.accel_flags) {
1446 mutex_unlock(&info->mm_lock);
1447 return -EINVAL;
1448 }
1449
1450 vma->vm_pgoff -= mmio_pgoff;
1451 start = info->fix.mmio_start;
1452 len = info->fix.mmio_len;
1453 }
1454 mutex_unlock(&info->mm_lock);
1455
1456 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
1457
1458
1459
1460
1461 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
1462 fb_pgprotect(file, vma, start);
1463
1464 return vm_iomap_memory(vma, start, len);
1465}
1466
1467static int
1468fb_open(struct inode *inode, struct file *file)
1469__acquires(&info->lock)
1470__releases(&info->lock)
1471{
1472 int fbidx = iminor(inode);
1473 struct fb_info *info;
1474 int res = 0;
1475
1476 info = get_fb_info(fbidx);
1477 if (!info) {
1478 request_module("fb%d", fbidx);
1479 info = get_fb_info(fbidx);
1480 if (!info)
1481 return -ENODEV;
1482 }
1483 if (IS_ERR(info))
1484 return PTR_ERR(info);
1485
1486 mutex_lock(&info->lock);
1487 if (!try_module_get(info->fbops->owner)) {
1488 res = -ENODEV;
1489 goto out;
1490 }
1491 file->private_data = info;
1492 if (info->fbops->fb_open) {
1493 res = info->fbops->fb_open(info,1);
1494 if (res)
1495 module_put(info->fbops->owner);
1496 }
1497#ifdef CONFIG_FB_DEFERRED_IO
1498 if (info->fbdefio)
1499 fb_deferred_io_open(info, inode, file);
1500#endif
1501out:
1502 mutex_unlock(&info->lock);
1503 if (res)
1504 put_fb_info(info);
1505 return res;
1506}
1507
1508static int
1509fb_release(struct inode *inode, struct file *file)
1510__acquires(&info->lock)
1511__releases(&info->lock)
1512{
1513 struct fb_info * const info = file->private_data;
1514
1515 mutex_lock(&info->lock);
1516 if (info->fbops->fb_release)
1517 info->fbops->fb_release(info,1);
1518 module_put(info->fbops->owner);
1519 mutex_unlock(&info->lock);
1520 put_fb_info(info);
1521 return 0;
1522}
1523
1524#if defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && !defined(CONFIG_MMU)
1525unsigned long get_fb_unmapped_area(struct file *filp,
1526 unsigned long addr, unsigned long len,
1527 unsigned long pgoff, unsigned long flags)
1528{
1529 struct fb_info * const info = filp->private_data;
1530 unsigned long fb_size = PAGE_ALIGN(info->fix.smem_len);
1531
1532 if (pgoff > fb_size || len > fb_size - pgoff)
1533 return -EINVAL;
1534
1535 return (unsigned long)info->screen_base + pgoff;
1536}
1537#endif
1538
1539static const struct file_operations fb_fops = {
1540 .owner = THIS_MODULE,
1541 .read = fb_read,
1542 .write = fb_write,
1543 .unlocked_ioctl = fb_ioctl,
1544#ifdef CONFIG_COMPAT
1545 .compat_ioctl = fb_compat_ioctl,
1546#endif
1547 .mmap = fb_mmap,
1548 .open = fb_open,
1549 .release = fb_release,
1550#if defined(HAVE_ARCH_FB_UNMAPPED_AREA) || \
1551 (defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && \
1552 !defined(CONFIG_MMU))
1553 .get_unmapped_area = get_fb_unmapped_area,
1554#endif
1555#ifdef CONFIG_FB_DEFERRED_IO
1556 .fsync = fb_deferred_io_fsync,
1557#endif
1558 .llseek = default_llseek,
1559};
1560
1561struct class *fb_class;
1562EXPORT_SYMBOL(fb_class);
1563
1564static int fb_check_foreignness(struct fb_info *fi)
1565{
1566 const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
1567
1568 fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
1569
1570#ifdef __BIG_ENDIAN
1571 fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
1572#else
1573 fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
1574#endif
1575
1576 if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
1577 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1578 "support this framebuffer\n", fi->fix.id);
1579 return -ENOSYS;
1580 } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
1581 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1582 "support this framebuffer\n", fi->fix.id);
1583 return -ENOSYS;
1584 }
1585
1586 return 0;
1587}
1588
1589static bool apertures_overlap(struct aperture *gen, struct aperture *hw)
1590{
1591
1592 if (gen->base == hw->base)
1593 return true;
1594
1595 if (gen->base > hw->base && gen->base < hw->base + hw->size)
1596 return true;
1597 return false;
1598}
1599
1600static bool fb_do_apertures_overlap(struct apertures_struct *gena,
1601 struct apertures_struct *hwa)
1602{
1603 int i, j;
1604 if (!hwa || !gena)
1605 return false;
1606
1607 for (i = 0; i < hwa->count; ++i) {
1608 struct aperture *h = &hwa->ranges[i];
1609 for (j = 0; j < gena->count; ++j) {
1610 struct aperture *g = &gena->ranges[j];
1611 printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n",
1612 (unsigned long long)g->base,
1613 (unsigned long long)g->size,
1614 (unsigned long long)h->base,
1615 (unsigned long long)h->size);
1616 if (apertures_overlap(g, h))
1617 return true;
1618 }
1619 }
1620
1621 return false;
1622}
1623
1624static int do_unregister_framebuffer(struct fb_info *fb_info);
1625
1626#define VGA_FB_PHYS 0xA0000
1627static int do_remove_conflicting_framebuffers(struct apertures_struct *a,
1628 const char *name, bool primary)
1629{
1630 int i, ret;
1631
1632
1633 for_each_registered_fb(i) {
1634 struct apertures_struct *gen_aper;
1635
1636 if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE))
1637 continue;
1638
1639 gen_aper = registered_fb[i]->apertures;
1640 if (fb_do_apertures_overlap(gen_aper, a) ||
1641 (primary && gen_aper && gen_aper->count &&
1642 gen_aper->ranges[0].base == VGA_FB_PHYS)) {
1643
1644 printk(KERN_INFO "fb%d: switching to %s from %s\n",
1645 i, name, registered_fb[i]->fix.id);
1646 ret = do_unregister_framebuffer(registered_fb[i]);
1647 if (ret)
1648 return ret;
1649 }
1650 }
1651
1652 return 0;
1653}
1654
1655static bool lockless_register_fb;
1656module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400);
1657MODULE_PARM_DESC(lockless_register_fb,
1658 "Lockless framebuffer registration for debugging [default=off]");
1659
1660static int do_register_framebuffer(struct fb_info *fb_info)
1661{
1662 int i, ret;
1663 struct fb_event event;
1664 struct fb_videomode mode;
1665
1666 if (fb_check_foreignness(fb_info))
1667 return -ENOSYS;
1668
1669 ret = do_remove_conflicting_framebuffers(fb_info->apertures,
1670 fb_info->fix.id,
1671 fb_is_primary_device(fb_info));
1672 if (ret)
1673 return ret;
1674
1675 if (num_registered_fb == FB_MAX)
1676 return -ENXIO;
1677
1678 num_registered_fb++;
1679 for (i = 0 ; i < FB_MAX; i++)
1680 if (!registered_fb[i])
1681 break;
1682 fb_info->node = i;
1683 atomic_set(&fb_info->count, 1);
1684 mutex_init(&fb_info->lock);
1685 mutex_init(&fb_info->mm_lock);
1686
1687 fb_info->dev = device_create(fb_class, fb_info->device,
1688 MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1689 if (IS_ERR(fb_info->dev)) {
1690
1691 printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1692 fb_info->dev = NULL;
1693 } else
1694 fb_init_device(fb_info);
1695
1696 if (fb_info->pixmap.addr == NULL) {
1697 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1698 if (fb_info->pixmap.addr) {
1699 fb_info->pixmap.size = FBPIXMAPSIZE;
1700 fb_info->pixmap.buf_align = 1;
1701 fb_info->pixmap.scan_align = 1;
1702 fb_info->pixmap.access_align = 32;
1703 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1704 }
1705 }
1706 fb_info->pixmap.offset = 0;
1707
1708 if (!fb_info->pixmap.blit_x)
1709 fb_info->pixmap.blit_x = ~(u32)0;
1710
1711 if (!fb_info->pixmap.blit_y)
1712 fb_info->pixmap.blit_y = ~(u32)0;
1713
1714 if (!fb_info->modelist.prev || !fb_info->modelist.next)
1715 INIT_LIST_HEAD(&fb_info->modelist);
1716
1717 if (fb_info->skip_vt_switch)
1718 pm_vt_switch_required(fb_info->dev, false);
1719 else
1720 pm_vt_switch_required(fb_info->dev, true);
1721
1722 fb_var_to_videomode(&mode, &fb_info->var);
1723 fb_add_videomode(&mode, &fb_info->modelist);
1724 registered_fb[i] = fb_info;
1725
1726 event.info = fb_info;
1727 if (!lockless_register_fb)
1728 console_lock();
1729 else
1730 atomic_inc(&ignore_console_lock_warning);
1731 if (!lock_fb_info(fb_info)) {
1732 ret = -ENODEV;
1733 goto unlock_console;
1734 }
1735 ret = 0;
1736
1737 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
1738 unlock_fb_info(fb_info);
1739unlock_console:
1740 if (!lockless_register_fb)
1741 console_unlock();
1742 else
1743 atomic_dec(&ignore_console_lock_warning);
1744 return ret;
1745}
1746
1747static int unbind_console(struct fb_info *fb_info)
1748{
1749 struct fb_event event;
1750 int ret;
1751 int i = fb_info->node;
1752
1753 if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
1754 return -EINVAL;
1755
1756 console_lock();
1757 if (!lock_fb_info(fb_info)) {
1758 console_unlock();
1759 return -ENODEV;
1760 }
1761
1762 event.info = fb_info;
1763 ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
1764 unlock_fb_info(fb_info);
1765 console_unlock();
1766
1767 return ret;
1768}
1769
1770static int __unlink_framebuffer(struct fb_info *fb_info);
1771
1772static int do_unregister_framebuffer(struct fb_info *fb_info)
1773{
1774 struct fb_event event;
1775 int ret;
1776
1777 ret = unbind_console(fb_info);
1778
1779 if (ret)
1780 return -EINVAL;
1781
1782 pm_vt_switch_unregister(fb_info->dev);
1783
1784 __unlink_framebuffer(fb_info);
1785 if (fb_info->pixmap.addr &&
1786 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1787 kfree(fb_info->pixmap.addr);
1788 fb_destroy_modelist(&fb_info->modelist);
1789 registered_fb[fb_info->node] = NULL;
1790 num_registered_fb--;
1791 fb_cleanup_device(fb_info);
1792 event.info = fb_info;
1793 console_lock();
1794 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
1795 console_unlock();
1796
1797
1798 put_fb_info(fb_info);
1799 return 0;
1800}
1801
1802static int __unlink_framebuffer(struct fb_info *fb_info)
1803{
1804 int i;
1805
1806 i = fb_info->node;
1807 if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
1808 return -EINVAL;
1809
1810 if (fb_info->dev) {
1811 device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1812 fb_info->dev = NULL;
1813 }
1814
1815 return 0;
1816}
1817
1818int unlink_framebuffer(struct fb_info *fb_info)
1819{
1820 int ret;
1821
1822 ret = __unlink_framebuffer(fb_info);
1823 if (ret)
1824 return ret;
1825
1826 unbind_console(fb_info);
1827
1828 return 0;
1829}
1830EXPORT_SYMBOL(unlink_framebuffer);
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842int remove_conflicting_framebuffers(struct apertures_struct *a,
1843 const char *name, bool primary)
1844{
1845 int ret;
1846 bool do_free = false;
1847
1848 if (!a) {
1849 a = alloc_apertures(1);
1850 if (!a)
1851 return -ENOMEM;
1852
1853 a->ranges[0].base = 0;
1854 a->ranges[0].size = ~0;
1855 do_free = true;
1856 }
1857
1858 mutex_lock(®istration_lock);
1859 ret = do_remove_conflicting_framebuffers(a, name, primary);
1860 mutex_unlock(®istration_lock);
1861
1862 if (do_free)
1863 kfree(a);
1864
1865 return ret;
1866}
1867EXPORT_SYMBOL(remove_conflicting_framebuffers);
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id, const char *name)
1882{
1883 struct apertures_struct *ap;
1884 bool primary = false;
1885 int err;
1886
1887 ap = alloc_apertures(1);
1888 if (!ap)
1889 return -ENOMEM;
1890
1891 ap->ranges[0].base = pci_resource_start(pdev, res_id);
1892 ap->ranges[0].size = pci_resource_len(pdev, res_id);
1893#ifdef CONFIG_X86
1894 primary = pdev->resource[PCI_ROM_RESOURCE].flags &
1895 IORESOURCE_ROM_SHADOW;
1896#endif
1897 err = remove_conflicting_framebuffers(ap, name, primary);
1898 kfree(ap);
1899 return err;
1900}
1901EXPORT_SYMBOL(remove_conflicting_pci_framebuffers);
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912int
1913register_framebuffer(struct fb_info *fb_info)
1914{
1915 int ret;
1916
1917 mutex_lock(®istration_lock);
1918 ret = do_register_framebuffer(fb_info);
1919 mutex_unlock(®istration_lock);
1920
1921 return ret;
1922}
1923EXPORT_SYMBOL(register_framebuffer);
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941int
1942unregister_framebuffer(struct fb_info *fb_info)
1943{
1944 int ret;
1945
1946 mutex_lock(®istration_lock);
1947 ret = do_unregister_framebuffer(fb_info);
1948 mutex_unlock(®istration_lock);
1949
1950 return ret;
1951}
1952EXPORT_SYMBOL(unregister_framebuffer);
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963void fb_set_suspend(struct fb_info *info, int state)
1964{
1965 struct fb_event event;
1966
1967 event.info = info;
1968 if (state) {
1969 fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
1970 info->state = FBINFO_STATE_SUSPENDED;
1971 } else {
1972 info->state = FBINFO_STATE_RUNNING;
1973 fb_notifier_call_chain(FB_EVENT_RESUME, &event);
1974 }
1975}
1976EXPORT_SYMBOL(fb_set_suspend);
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987static int __init
1988fbmem_init(void)
1989{
1990 int ret;
1991
1992 if (!proc_create_seq("fb", 0, NULL, &proc_fb_seq_ops))
1993 return -ENOMEM;
1994
1995 ret = register_chrdev(FB_MAJOR, "fb", &fb_fops);
1996 if (ret) {
1997 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1998 goto err_chrdev;
1999 }
2000
2001 fb_class = class_create(THIS_MODULE, "graphics");
2002 if (IS_ERR(fb_class)) {
2003 ret = PTR_ERR(fb_class);
2004 pr_warn("Unable to create fb class; errno = %d\n", ret);
2005 fb_class = NULL;
2006 goto err_class;
2007 }
2008
2009 fb_console_init();
2010
2011 return 0;
2012
2013err_class:
2014 unregister_chrdev(FB_MAJOR, "fb");
2015err_chrdev:
2016 remove_proc_entry("fb", NULL);
2017 return ret;
2018}
2019
2020#ifdef MODULE
2021module_init(fbmem_init);
2022static void __exit
2023fbmem_exit(void)
2024{
2025 fb_console_exit();
2026
2027 remove_proc_entry("fb", NULL);
2028 class_destroy(fb_class);
2029 unregister_chrdev(FB_MAJOR, "fb");
2030}
2031
2032module_exit(fbmem_exit);
2033MODULE_LICENSE("GPL");
2034MODULE_DESCRIPTION("Framebuffer base");
2035#else
2036subsys_initcall(fbmem_init);
2037#endif
2038
2039int fb_new_modelist(struct fb_info *info)
2040{
2041 struct fb_event event;
2042 struct fb_var_screeninfo var = info->var;
2043 struct list_head *pos, *n;
2044 struct fb_modelist *modelist;
2045 struct fb_videomode *m, mode;
2046 int err = 1;
2047
2048 list_for_each_safe(pos, n, &info->modelist) {
2049 modelist = list_entry(pos, struct fb_modelist, list);
2050 m = &modelist->mode;
2051 fb_videomode_to_var(&var, m);
2052 var.activate = FB_ACTIVATE_TEST;
2053 err = fb_set_var(info, &var);
2054 fb_var_to_videomode(&mode, &var);
2055 if (err || !fb_mode_is_equal(m, &mode)) {
2056 list_del(pos);
2057 kfree(pos);
2058 }
2059 }
2060
2061 err = 1;
2062
2063 if (!list_empty(&info->modelist)) {
2064 event.info = info;
2065 err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
2066 }
2067
2068 return err;
2069}
2070
2071MODULE_LICENSE("GPL");
2072