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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;
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
83
84
85
86
87int fb_get_color_depth(struct fb_var_screeninfo *var,
88 struct fb_fix_screeninfo *fix)
89{
90 int depth = 0;
91
92 if (fix->visual == FB_VISUAL_MONO01 ||
93 fix->visual == FB_VISUAL_MONO10)
94 depth = 1;
95 else {
96 if (var->green.length == var->blue.length &&
97 var->green.length == var->red.length &&
98 var->green.offset == var->blue.offset &&
99 var->green.offset == var->red.offset)
100 depth = var->green.length;
101 else
102 depth = var->green.length + var->red.length +
103 var->blue.length;
104 }
105
106 return depth;
107}
108EXPORT_SYMBOL(fb_get_color_depth);
109
110
111
112
113void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
114{
115 __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
116}
117EXPORT_SYMBOL(fb_pad_aligned_buffer);
118
119void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
120 u32 shift_high, u32 shift_low, u32 mod)
121{
122 u8 mask = (u8) (0xfff << shift_high), tmp;
123 int i, j;
124
125 for (i = height; i--; ) {
126 for (j = 0; j < idx; j++) {
127 tmp = dst[j];
128 tmp &= mask;
129 tmp |= *src >> shift_low;
130 dst[j] = tmp;
131 tmp = *src << shift_high;
132 dst[j+1] = tmp;
133 src++;
134 }
135 tmp = dst[idx];
136 tmp &= mask;
137 tmp |= *src >> shift_low;
138 dst[idx] = tmp;
139 if (shift_high < mod) {
140 tmp = *src << shift_high;
141 dst[idx+1] = tmp;
142 }
143 src++;
144 dst += d_pitch;
145 }
146}
147EXPORT_SYMBOL(fb_pad_unaligned_buffer);
148
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152
153char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
154{
155 u32 align = buf->buf_align - 1, offset;
156 char *addr = buf->addr;
157
158
159
160
161 if (buf->flags & FB_PIXMAP_IO) {
162 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
163 info->fbops->fb_sync(info);
164 return addr;
165 }
166
167
168 offset = buf->offset + align;
169 offset &= ~align;
170 if (offset + size > buf->size) {
171
172
173
174
175 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
176 info->fbops->fb_sync(info);
177 offset = 0;
178 }
179 buf->offset = offset + size;
180 addr += offset;
181
182 return addr;
183}
184EXPORT_SYMBOL(fb_get_buffer_offset);
185
186#ifdef CONFIG_LOGO
187
188static inline unsigned safe_shift(unsigned d, int n)
189{
190 return n < 0 ? d >> -n : d << n;
191}
192
193static void fb_set_logocmap(struct fb_info *info,
194 const struct linux_logo *logo)
195{
196 struct fb_cmap palette_cmap;
197 u16 palette_green[16];
198 u16 palette_blue[16];
199 u16 palette_red[16];
200 int i, j, n;
201 const unsigned char *clut = logo->clut;
202
203 palette_cmap.start = 0;
204 palette_cmap.len = 16;
205 palette_cmap.red = palette_red;
206 palette_cmap.green = palette_green;
207 palette_cmap.blue = palette_blue;
208 palette_cmap.transp = NULL;
209
210 for (i = 0; i < logo->clutsize; i += n) {
211 n = logo->clutsize - i;
212
213 if (n > 16)
214 n = 16;
215 palette_cmap.start = 32 + i;
216 palette_cmap.len = n;
217 for (j = 0; j < n; ++j) {
218 palette_cmap.red[j] = clut[0] << 8 | clut[0];
219 palette_cmap.green[j] = clut[1] << 8 | clut[1];
220 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
221 clut += 3;
222 }
223 fb_set_cmap(&palette_cmap, info);
224 }
225}
226
227static void fb_set_logo_truepalette(struct fb_info *info,
228 const struct linux_logo *logo,
229 u32 *palette)
230{
231 static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
232 unsigned char redmask, greenmask, bluemask;
233 int redshift, greenshift, blueshift;
234 int i;
235 const unsigned char *clut = logo->clut;
236
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241
242 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
243 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
244 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
245 redshift = info->var.red.offset - (8 - info->var.red.length);
246 greenshift = info->var.green.offset - (8 - info->var.green.length);
247 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
248
249 for ( i = 0; i < logo->clutsize; i++) {
250 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
251 safe_shift((clut[1] & greenmask), greenshift) |
252 safe_shift((clut[2] & bluemask), blueshift));
253 clut += 3;
254 }
255}
256
257static void fb_set_logo_directpalette(struct fb_info *info,
258 const struct linux_logo *logo,
259 u32 *palette)
260{
261 int redshift, greenshift, blueshift;
262 int i;
263
264 redshift = info->var.red.offset;
265 greenshift = info->var.green.offset;
266 blueshift = info->var.blue.offset;
267
268 for (i = 32; i < 32 + logo->clutsize; i++)
269 palette[i] = i << redshift | i << greenshift | i << blueshift;
270}
271
272static void fb_set_logo(struct fb_info *info,
273 const struct linux_logo *logo, u8 *dst,
274 int depth)
275{
276 int i, j, k;
277 const u8 *src = logo->data;
278 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
279 u8 fg = 1, d;
280
281 switch (fb_get_color_depth(&info->var, &info->fix)) {
282 case 1:
283 fg = 1;
284 break;
285 case 2:
286 fg = 3;
287 break;
288 default:
289 fg = 7;
290 break;
291 }
292
293 if (info->fix.visual == FB_VISUAL_MONO01 ||
294 info->fix.visual == FB_VISUAL_MONO10)
295 fg = ~((u8) (0xfff << info->var.green.length));
296
297 switch (depth) {
298 case 4:
299 for (i = 0; i < logo->height; i++)
300 for (j = 0; j < logo->width; src++) {
301 *dst++ = *src >> 4;
302 j++;
303 if (j < logo->width) {
304 *dst++ = *src & 0x0f;
305 j++;
306 }
307 }
308 break;
309 case 1:
310 for (i = 0; i < logo->height; i++) {
311 for (j = 0; j < logo->width; src++) {
312 d = *src ^ xor;
313 for (k = 7; k >= 0 && j < logo->width; k--) {
314 *dst++ = ((d >> k) & 1) ? fg : 0;
315 j++;
316 }
317 }
318 }
319 break;
320 }
321}
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349static struct logo_data {
350 int depth;
351 int needs_directpalette;
352 int needs_truepalette;
353 int needs_cmapreset;
354 const struct linux_logo *logo;
355} fb_logo __read_mostly;
356
357static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
358{
359 u32 size = width * height, i;
360
361 out += size - 1;
362
363 for (i = size; i--; )
364 *out-- = *in++;
365}
366
367static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
368{
369 int i, j, h = height - 1;
370
371 for (i = 0; i < height; i++)
372 for (j = 0; j < width; j++)
373 out[height * j + h - i] = *in++;
374}
375
376static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
377{
378 int i, j, w = width - 1;
379
380 for (i = 0; i < height; i++)
381 for (j = 0; j < width; j++)
382 out[height * (w - j) + i] = *in++;
383}
384
385static void fb_rotate_logo(struct fb_info *info, u8 *dst,
386 struct fb_image *image, int rotate)
387{
388 u32 tmp;
389
390 if (rotate == FB_ROTATE_UD) {
391 fb_rotate_logo_ud(image->data, dst, image->width,
392 image->height);
393 image->dx = info->var.xres - image->width - image->dx;
394 image->dy = info->var.yres - image->height - image->dy;
395 } else if (rotate == FB_ROTATE_CW) {
396 fb_rotate_logo_cw(image->data, dst, image->width,
397 image->height);
398 tmp = image->width;
399 image->width = image->height;
400 image->height = tmp;
401 tmp = image->dy;
402 image->dy = image->dx;
403 image->dx = info->var.xres - image->width - tmp;
404 } else if (rotate == FB_ROTATE_CCW) {
405 fb_rotate_logo_ccw(image->data, dst, image->width,
406 image->height);
407 tmp = image->width;
408 image->width = image->height;
409 image->height = tmp;
410 tmp = image->dx;
411 image->dx = image->dy;
412 image->dy = info->var.yres - image->height - tmp;
413 }
414
415 image->data = dst;
416}
417
418static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
419 int rotate, unsigned int num)
420{
421 unsigned int x;
422
423 if (image->width > info->var.xres || image->height > info->var.yres)
424 return;
425
426 if (rotate == FB_ROTATE_UR) {
427 for (x = 0;
428 x < num && image->dx + image->width <= info->var.xres;
429 x++) {
430 info->fbops->fb_imageblit(info, image);
431 image->dx += image->width + 8;
432 }
433 } else if (rotate == FB_ROTATE_UD) {
434 u32 dx = image->dx;
435
436 for (x = 0; x < num && image->dx <= dx; x++) {
437 info->fbops->fb_imageblit(info, image);
438 image->dx -= image->width + 8;
439 }
440 } else if (rotate == FB_ROTATE_CW) {
441 for (x = 0;
442 x < num && image->dy + image->height <= info->var.yres;
443 x++) {
444 info->fbops->fb_imageblit(info, image);
445 image->dy += image->height + 8;
446 }
447 } else if (rotate == FB_ROTATE_CCW) {
448 u32 dy = image->dy;
449
450 for (x = 0; x < num && image->dy <= dy; x++) {
451 info->fbops->fb_imageblit(info, image);
452 image->dy -= image->height + 8;
453 }
454 }
455}
456
457static int fb_show_logo_line(struct fb_info *info, int rotate,
458 const struct linux_logo *logo, int y,
459 unsigned int n)
460{
461 u32 *palette = NULL, *saved_pseudo_palette = NULL;
462 unsigned char *logo_new = NULL, *logo_rotate = NULL;
463 struct fb_image image;
464
465
466 if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
467 info->fbops->owner)
468 return 0;
469
470 image.depth = 8;
471 image.data = logo->data;
472
473 if (fb_logo.needs_cmapreset)
474 fb_set_logocmap(info, logo);
475
476 if (fb_logo.needs_truepalette ||
477 fb_logo.needs_directpalette) {
478 palette = kmalloc(256 * 4, GFP_KERNEL);
479 if (palette == NULL)
480 return 0;
481
482 if (fb_logo.needs_truepalette)
483 fb_set_logo_truepalette(info, logo, palette);
484 else
485 fb_set_logo_directpalette(info, logo, palette);
486
487 saved_pseudo_palette = info->pseudo_palette;
488 info->pseudo_palette = palette;
489 }
490
491 if (fb_logo.depth <= 4) {
492 logo_new = kmalloc_array(logo->width, logo->height,
493 GFP_KERNEL);
494 if (logo_new == NULL) {
495 kfree(palette);
496 if (saved_pseudo_palette)
497 info->pseudo_palette = saved_pseudo_palette;
498 return 0;
499 }
500 image.data = logo_new;
501 fb_set_logo(info, logo, logo_new, fb_logo.depth);
502 }
503
504 if (fb_center_logo) {
505 int xres = info->var.xres;
506 int yres = info->var.yres;
507
508 if (rotate == FB_ROTATE_CW || rotate == FB_ROTATE_CCW) {
509 xres = info->var.yres;
510 yres = info->var.xres;
511 }
512
513 while (n && (n * (logo->width + 8) - 8 > xres))
514 --n;
515 image.dx = (xres - n * (logo->width + 8) - 8) / 2;
516 image.dy = y ?: (yres - logo->height) / 2;
517 } else {
518 image.dx = 0;
519 image.dy = y;
520 }
521
522 image.width = logo->width;
523 image.height = logo->height;
524
525 if (rotate) {
526 logo_rotate = kmalloc_array(logo->width, logo->height,
527 GFP_KERNEL);
528 if (logo_rotate)
529 fb_rotate_logo(info, logo_rotate, &image, rotate);
530 }
531
532 fb_do_show_logo(info, &image, rotate, n);
533
534 kfree(palette);
535 if (saved_pseudo_palette != NULL)
536 info->pseudo_palette = saved_pseudo_palette;
537 kfree(logo_new);
538 kfree(logo_rotate);
539 return image.dy + logo->height;
540}
541
542
543#ifdef CONFIG_FB_LOGO_EXTRA
544
545#define FB_LOGO_EX_NUM_MAX 10
546static struct logo_data_extra {
547 const struct linux_logo *logo;
548 unsigned int n;
549} fb_logo_ex[FB_LOGO_EX_NUM_MAX];
550static unsigned int fb_logo_ex_num;
551
552void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
553{
554 if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
555 return;
556
557 fb_logo_ex[fb_logo_ex_num].logo = logo;
558 fb_logo_ex[fb_logo_ex_num].n = n;
559 fb_logo_ex_num++;
560}
561
562static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
563 unsigned int yres)
564{
565 unsigned int i;
566
567
568 if (info->fix.visual != FB_VISUAL_TRUECOLOR)
569 fb_logo_ex_num = 0;
570
571 for (i = 0; i < fb_logo_ex_num; i++) {
572 if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
573 fb_logo_ex[i].logo = NULL;
574 continue;
575 }
576 height += fb_logo_ex[i].logo->height;
577 if (height > yres) {
578 height -= fb_logo_ex[i].logo->height;
579 fb_logo_ex_num = i;
580 break;
581 }
582 }
583 return height;
584}
585
586static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
587{
588 unsigned int i;
589
590 for (i = 0; i < fb_logo_ex_num; i++)
591 y = fb_show_logo_line(info, rotate,
592 fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
593
594 return y;
595}
596
597#else
598
599static inline int fb_prepare_extra_logos(struct fb_info *info,
600 unsigned int height,
601 unsigned int yres)
602{
603 return height;
604}
605
606static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
607{
608 return y;
609}
610
611#endif
612
613
614int fb_prepare_logo(struct fb_info *info, int rotate)
615{
616 int depth = fb_get_color_depth(&info->var, &info->fix);
617 unsigned int yres;
618 int height;
619
620 memset(&fb_logo, 0, sizeof(struct logo_data));
621
622 if (info->flags & FBINFO_MISC_TILEBLITTING ||
623 info->fbops->owner)
624 return 0;
625
626 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
627 depth = info->var.blue.length;
628 if (info->var.red.length < depth)
629 depth = info->var.red.length;
630 if (info->var.green.length < depth)
631 depth = info->var.green.length;
632 }
633
634 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
635
636 depth = 4;
637 }
638
639
640 fb_logo.logo = fb_find_logo(depth);
641
642 if (!fb_logo.logo) {
643 return 0;
644 }
645
646 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
647 yres = info->var.yres;
648 else
649 yres = info->var.xres;
650
651 if (fb_logo.logo->height > yres) {
652 fb_logo.logo = NULL;
653 return 0;
654 }
655
656
657 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
658 fb_logo.depth = 8;
659 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
660 fb_logo.depth = 4;
661 else
662 fb_logo.depth = 1;
663
664
665 if (fb_logo.depth > 4 && depth > 4) {
666 switch (info->fix.visual) {
667 case FB_VISUAL_TRUECOLOR:
668 fb_logo.needs_truepalette = 1;
669 break;
670 case FB_VISUAL_DIRECTCOLOR:
671 fb_logo.needs_directpalette = 1;
672 fb_logo.needs_cmapreset = 1;
673 break;
674 case FB_VISUAL_PSEUDOCOLOR:
675 fb_logo.needs_cmapreset = 1;
676 break;
677 }
678 }
679
680 height = fb_logo.logo->height;
681 if (fb_center_logo)
682 height += (yres - fb_logo.logo->height) / 2;
683
684 return fb_prepare_extra_logos(info, height, yres);
685}
686
687int fb_show_logo(struct fb_info *info, int rotate)
688{
689 int y;
690
691 y = fb_show_logo_line(info, rotate, fb_logo.logo, 0,
692 num_online_cpus());
693 y = fb_show_extra_logos(info, y, rotate);
694
695 return y;
696}
697#else
698int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
699int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
700#endif
701EXPORT_SYMBOL(fb_prepare_logo);
702EXPORT_SYMBOL(fb_show_logo);
703
704static void *fb_seq_start(struct seq_file *m, loff_t *pos)
705{
706 mutex_lock(®istration_lock);
707 return (*pos < FB_MAX) ? pos : NULL;
708}
709
710static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
711{
712 (*pos)++;
713 return (*pos < FB_MAX) ? pos : NULL;
714}
715
716static void fb_seq_stop(struct seq_file *m, void *v)
717{
718 mutex_unlock(®istration_lock);
719}
720
721static int fb_seq_show(struct seq_file *m, void *v)
722{
723 int i = *(loff_t *)v;
724 struct fb_info *fi = registered_fb[i];
725
726 if (fi)
727 seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
728 return 0;
729}
730
731static const struct seq_operations proc_fb_seq_ops = {
732 .start = fb_seq_start,
733 .next = fb_seq_next,
734 .stop = fb_seq_stop,
735 .show = fb_seq_show,
736};
737
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744
745
746static struct fb_info *file_fb_info(struct file *file)
747{
748 struct inode *inode = file_inode(file);
749 int fbidx = iminor(inode);
750 struct fb_info *info = registered_fb[fbidx];
751
752 if (info != file->private_data)
753 info = NULL;
754 return info;
755}
756
757static ssize_t
758fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
759{
760 unsigned long p = *ppos;
761 struct fb_info *info = file_fb_info(file);
762 u8 *buffer, *dst;
763 u8 __iomem *src;
764 int c, cnt = 0, err = 0;
765 unsigned long total_size;
766
767 if (!info || ! info->screen_base)
768 return -ENODEV;
769
770 if (info->state != FBINFO_STATE_RUNNING)
771 return -EPERM;
772
773 if (info->fbops->fb_read)
774 return info->fbops->fb_read(info, buf, count, ppos);
775
776 total_size = info->screen_size;
777
778 if (total_size == 0)
779 total_size = info->fix.smem_len;
780
781 if (p >= total_size)
782 return 0;
783
784 if (count >= total_size)
785 count = total_size;
786
787 if (count + p > total_size)
788 count = total_size - p;
789
790 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
791 GFP_KERNEL);
792 if (!buffer)
793 return -ENOMEM;
794
795 src = (u8 __iomem *) (info->screen_base + p);
796
797 if (info->fbops->fb_sync)
798 info->fbops->fb_sync(info);
799
800 while (count) {
801 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
802 dst = buffer;
803 fb_memcpy_fromfb(dst, src, c);
804 dst += c;
805 src += c;
806
807 if (copy_to_user(buf, buffer, c)) {
808 err = -EFAULT;
809 break;
810 }
811 *ppos += c;
812 buf += c;
813 cnt += c;
814 count -= c;
815 }
816
817 kfree(buffer);
818
819 return (err) ? err : cnt;
820}
821
822static ssize_t
823fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
824{
825 unsigned long p = *ppos;
826 struct fb_info *info = file_fb_info(file);
827 u8 *buffer, *src;
828 u8 __iomem *dst;
829 int c, cnt = 0, err = 0;
830 unsigned long total_size;
831
832 if (!info || !info->screen_base)
833 return -ENODEV;
834
835 if (info->state != FBINFO_STATE_RUNNING)
836 return -EPERM;
837
838 if (info->fbops->fb_write)
839 return info->fbops->fb_write(info, buf, count, ppos);
840
841 total_size = info->screen_size;
842
843 if (total_size == 0)
844 total_size = info->fix.smem_len;
845
846 if (p > total_size)
847 return -EFBIG;
848
849 if (count > total_size) {
850 err = -EFBIG;
851 count = total_size;
852 }
853
854 if (count + p > total_size) {
855 if (!err)
856 err = -ENOSPC;
857
858 count = total_size - p;
859 }
860
861 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
862 GFP_KERNEL);
863 if (!buffer)
864 return -ENOMEM;
865
866 dst = (u8 __iomem *) (info->screen_base + p);
867
868 if (info->fbops->fb_sync)
869 info->fbops->fb_sync(info);
870
871 while (count) {
872 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
873 src = buffer;
874
875 if (copy_from_user(src, buf, c)) {
876 err = -EFAULT;
877 break;
878 }
879
880 fb_memcpy_tofb(dst, src, c);
881 dst += c;
882 src += c;
883 *ppos += c;
884 buf += c;
885 cnt += c;
886 count -= c;
887 }
888
889 kfree(buffer);
890
891 return (cnt) ? cnt : err;
892}
893
894int
895fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
896{
897 struct fb_fix_screeninfo *fix = &info->fix;
898 unsigned int yres = info->var.yres;
899 int err = 0;
900
901 if (var->yoffset > 0) {
902 if (var->vmode & FB_VMODE_YWRAP) {
903 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
904 err = -EINVAL;
905 else
906 yres = 0;
907 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
908 err = -EINVAL;
909 }
910
911 if (var->xoffset > 0 && (!fix->xpanstep ||
912 (var->xoffset % fix->xpanstep)))
913 err = -EINVAL;
914
915 if (err || !info->fbops->fb_pan_display ||
916 var->yoffset > info->var.yres_virtual - yres ||
917 var->xoffset > info->var.xres_virtual - info->var.xres)
918 return -EINVAL;
919
920 if ((err = info->fbops->fb_pan_display(var, info)))
921 return err;
922 info->var.xoffset = var->xoffset;
923 info->var.yoffset = var->yoffset;
924 if (var->vmode & FB_VMODE_YWRAP)
925 info->var.vmode |= FB_VMODE_YWRAP;
926 else
927 info->var.vmode &= ~FB_VMODE_YWRAP;
928 return 0;
929}
930EXPORT_SYMBOL(fb_pan_display);
931
932static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
933 u32 activate)
934{
935 struct fb_blit_caps caps, fbcaps;
936 int err = 0;
937
938 memset(&caps, 0, sizeof(caps));
939 memset(&fbcaps, 0, sizeof(fbcaps));
940 caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
941 fbcon_get_requirement(info, &caps);
942 info->fbops->fb_get_caps(info, &fbcaps, var);
943
944 if (((fbcaps.x ^ caps.x) & caps.x) ||
945 ((fbcaps.y ^ caps.y) & caps.y) ||
946 (fbcaps.len < caps.len))
947 err = -EINVAL;
948
949 return err;
950}
951
952int
953fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
954{
955 int flags = info->flags;
956 int ret = 0;
957 u32 activate;
958 struct fb_var_screeninfo old_var;
959 struct fb_videomode mode;
960 struct fb_event event;
961
962 if (var->activate & FB_ACTIVATE_INV_MODE) {
963 struct fb_videomode mode1, mode2;
964
965 fb_var_to_videomode(&mode1, var);
966 fb_var_to_videomode(&mode2, &info->var);
967
968 ret = fb_mode_is_equal(&mode1, &mode2);
969
970 if (!ret)
971 fbcon_mode_deleted(info, &mode1);
972
973 if (!ret)
974 fb_delete_videomode(&mode1, &info->modelist);
975
976
977 return ret ? -EINVAL : 0;
978 }
979
980 if (!(var->activate & FB_ACTIVATE_FORCE) &&
981 !memcmp(&info->var, var, sizeof(struct fb_var_screeninfo)))
982 return 0;
983
984 activate = var->activate;
985
986
987
988
989 if ((info->fix.capabilities & FB_CAP_FOURCC) &&
990 var->grayscale > 1) {
991 if (var->red.offset || var->green.offset ||
992 var->blue.offset || var->transp.offset ||
993 var->red.length || var->green.length ||
994 var->blue.length || var->transp.length ||
995 var->red.msb_right || var->green.msb_right ||
996 var->blue.msb_right || var->transp.msb_right)
997 return -EINVAL;
998 }
999
1000 if (!info->fbops->fb_check_var) {
1001 *var = info->var;
1002 return 0;
1003 }
1004
1005 ret = info->fbops->fb_check_var(var, info);
1006
1007 if (ret)
1008 return ret;
1009
1010 if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW)
1011 return 0;
1012
1013 if (info->fbops->fb_get_caps) {
1014 ret = fb_check_caps(info, var, activate);
1015
1016 if (ret)
1017 return ret;
1018 }
1019
1020 old_var = info->var;
1021 info->var = *var;
1022
1023 if (info->fbops->fb_set_par) {
1024 ret = info->fbops->fb_set_par(info);
1025
1026 if (ret) {
1027 info->var = old_var;
1028 printk(KERN_WARNING "detected "
1029 "fb_set_par error, "
1030 "error code: %d\n", ret);
1031 return ret;
1032 }
1033 }
1034
1035 fb_pan_display(info, &info->var);
1036 fb_set_cmap(&info->cmap, info);
1037 fb_var_to_videomode(&mode, &info->var);
1038
1039 if (info->modelist.prev && info->modelist.next &&
1040 !list_empty(&info->modelist))
1041 ret = fb_add_videomode(&mode, &info->modelist);
1042
1043 if (ret)
1044 return ret;
1045
1046 event.info = info;
1047 event.data = &mode;
1048 fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event);
1049
1050 if (flags & FBINFO_MISC_USEREVENT)
1051 fbcon_update_vcs(info, activate & FB_ACTIVATE_ALL);
1052
1053 return 0;
1054}
1055EXPORT_SYMBOL(fb_set_var);
1056
1057int
1058fb_blank(struct fb_info *info, int blank)
1059{
1060 struct fb_event event;
1061 int ret = -EINVAL, early_ret;
1062
1063 if (blank > FB_BLANK_POWERDOWN)
1064 blank = FB_BLANK_POWERDOWN;
1065
1066 event.info = info;
1067 event.data = ␣
1068
1069 early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
1070
1071 if (info->fbops->fb_blank)
1072 ret = info->fbops->fb_blank(blank, info);
1073
1074 if (!ret)
1075 fb_notifier_call_chain(FB_EVENT_BLANK, &event);
1076 else {
1077
1078
1079
1080
1081 if (!early_ret)
1082 fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK, &event);
1083 }
1084
1085 return ret;
1086}
1087EXPORT_SYMBOL(fb_blank);
1088
1089static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
1090 unsigned long arg)
1091{
1092 struct fb_ops *fb;
1093 struct fb_var_screeninfo var;
1094 struct fb_fix_screeninfo fix;
1095 struct fb_cmap cmap_from;
1096 struct fb_cmap_user cmap;
1097 void __user *argp = (void __user *)arg;
1098 long ret = 0;
1099
1100 switch (cmd) {
1101 case FBIOGET_VSCREENINFO:
1102 lock_fb_info(info);
1103 var = info->var;
1104 unlock_fb_info(info);
1105
1106 ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0;
1107 break;
1108 case FBIOPUT_VSCREENINFO:
1109 if (copy_from_user(&var, argp, sizeof(var)))
1110 return -EFAULT;
1111 console_lock();
1112 lock_fb_info(info);
1113 info->flags |= FBINFO_MISC_USEREVENT;
1114 ret = fb_set_var(info, &var);
1115 info->flags &= ~FBINFO_MISC_USEREVENT;
1116 unlock_fb_info(info);
1117 console_unlock();
1118 if (!ret && copy_to_user(argp, &var, sizeof(var)))
1119 ret = -EFAULT;
1120 break;
1121 case FBIOGET_FSCREENINFO:
1122 lock_fb_info(info);
1123 fix = info->fix;
1124 if (info->flags & FBINFO_HIDE_SMEM_START)
1125 fix.smem_start = 0;
1126 unlock_fb_info(info);
1127
1128 ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0;
1129 break;
1130 case FBIOPUTCMAP:
1131 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1132 return -EFAULT;
1133 ret = fb_set_user_cmap(&cmap, info);
1134 break;
1135 case FBIOGETCMAP:
1136 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1137 return -EFAULT;
1138 lock_fb_info(info);
1139 cmap_from = info->cmap;
1140 unlock_fb_info(info);
1141 ret = fb_cmap_to_user(&cmap_from, &cmap);
1142 break;
1143 case FBIOPAN_DISPLAY:
1144 if (copy_from_user(&var, argp, sizeof(var)))
1145 return -EFAULT;
1146 console_lock();
1147 lock_fb_info(info);
1148 ret = fb_pan_display(info, &var);
1149 unlock_fb_info(info);
1150 console_unlock();
1151 if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
1152 return -EFAULT;
1153 break;
1154 case FBIO_CURSOR:
1155 ret = -EINVAL;
1156 break;
1157 case FBIOGET_CON2FBMAP:
1158 ret = fbcon_get_con2fb_map_ioctl(argp);
1159 break;
1160 case FBIOPUT_CON2FBMAP:
1161 ret = fbcon_set_con2fb_map_ioctl(argp);
1162 break;
1163 case FBIOBLANK:
1164 console_lock();
1165 lock_fb_info(info);
1166 ret = fb_blank(info, arg);
1167
1168 fbcon_fb_blanked(info, arg);
1169 unlock_fb_info(info);
1170 console_unlock();
1171 break;
1172 default:
1173 lock_fb_info(info);
1174 fb = info->fbops;
1175 if (fb->fb_ioctl)
1176 ret = fb->fb_ioctl(info, cmd, arg);
1177 else
1178 ret = -ENOTTY;
1179 unlock_fb_info(info);
1180 }
1181 return ret;
1182}
1183
1184static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1185{
1186 struct fb_info *info = file_fb_info(file);
1187
1188 if (!info)
1189 return -ENODEV;
1190 return do_fb_ioctl(info, cmd, arg);
1191}
1192
1193#ifdef CONFIG_COMPAT
1194struct fb_fix_screeninfo32 {
1195 char id[16];
1196 compat_caddr_t smem_start;
1197 u32 smem_len;
1198 u32 type;
1199 u32 type_aux;
1200 u32 visual;
1201 u16 xpanstep;
1202 u16 ypanstep;
1203 u16 ywrapstep;
1204 u32 line_length;
1205 compat_caddr_t mmio_start;
1206 u32 mmio_len;
1207 u32 accel;
1208 u16 reserved[3];
1209};
1210
1211struct fb_cmap32 {
1212 u32 start;
1213 u32 len;
1214 compat_caddr_t red;
1215 compat_caddr_t green;
1216 compat_caddr_t blue;
1217 compat_caddr_t transp;
1218};
1219
1220static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
1221 unsigned long arg)
1222{
1223 struct fb_cmap_user __user *cmap;
1224 struct fb_cmap32 __user *cmap32;
1225 __u32 data;
1226 int err;
1227
1228 cmap = compat_alloc_user_space(sizeof(*cmap));
1229 cmap32 = compat_ptr(arg);
1230
1231 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1232 return -EFAULT;
1233
1234 if (get_user(data, &cmap32->red) ||
1235 put_user(compat_ptr(data), &cmap->red) ||
1236 get_user(data, &cmap32->green) ||
1237 put_user(compat_ptr(data), &cmap->green) ||
1238 get_user(data, &cmap32->blue) ||
1239 put_user(compat_ptr(data), &cmap->blue) ||
1240 get_user(data, &cmap32->transp) ||
1241 put_user(compat_ptr(data), &cmap->transp))
1242 return -EFAULT;
1243
1244 err = do_fb_ioctl(info, cmd, (unsigned long) cmap);
1245
1246 if (!err) {
1247 if (copy_in_user(&cmap32->start,
1248 &cmap->start,
1249 2 * sizeof(__u32)))
1250 err = -EFAULT;
1251 }
1252 return err;
1253}
1254
1255static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1256 struct fb_fix_screeninfo32 __user *fix32)
1257{
1258 __u32 data;
1259 int err;
1260
1261 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1262
1263 data = (__u32) (unsigned long) fix->smem_start;
1264 err |= put_user(data, &fix32->smem_start);
1265
1266 err |= put_user(fix->smem_len, &fix32->smem_len);
1267 err |= put_user(fix->type, &fix32->type);
1268 err |= put_user(fix->type_aux, &fix32->type_aux);
1269 err |= put_user(fix->visual, &fix32->visual);
1270 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1271 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1272 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1273 err |= put_user(fix->line_length, &fix32->line_length);
1274
1275 data = (__u32) (unsigned long) fix->mmio_start;
1276 err |= put_user(data, &fix32->mmio_start);
1277
1278 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1279 err |= put_user(fix->accel, &fix32->accel);
1280 err |= copy_to_user(fix32->reserved, fix->reserved,
1281 sizeof(fix->reserved));
1282
1283 if (err)
1284 return -EFAULT;
1285 return 0;
1286}
1287
1288static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
1289 unsigned long arg)
1290{
1291 struct fb_fix_screeninfo fix;
1292
1293 lock_fb_info(info);
1294 fix = info->fix;
1295 if (info->flags & FBINFO_HIDE_SMEM_START)
1296 fix.smem_start = 0;
1297 unlock_fb_info(info);
1298 return do_fscreeninfo_to_user(&fix, compat_ptr(arg));
1299}
1300
1301static long fb_compat_ioctl(struct file *file, unsigned int cmd,
1302 unsigned long arg)
1303{
1304 struct fb_info *info = file_fb_info(file);
1305 struct fb_ops *fb;
1306 long ret = -ENOIOCTLCMD;
1307
1308 if (!info)
1309 return -ENODEV;
1310 fb = info->fbops;
1311 switch(cmd) {
1312 case FBIOGET_VSCREENINFO:
1313 case FBIOPUT_VSCREENINFO:
1314 case FBIOPAN_DISPLAY:
1315 case FBIOGET_CON2FBMAP:
1316 case FBIOPUT_CON2FBMAP:
1317 arg = (unsigned long) compat_ptr(arg);
1318
1319 case FBIOBLANK:
1320 ret = do_fb_ioctl(info, cmd, arg);
1321 break;
1322
1323 case FBIOGET_FSCREENINFO:
1324 ret = fb_get_fscreeninfo(info, cmd, arg);
1325 break;
1326
1327 case FBIOGETCMAP:
1328 case FBIOPUTCMAP:
1329 ret = fb_getput_cmap(info, cmd, arg);
1330 break;
1331
1332 default:
1333 if (fb->fb_compat_ioctl)
1334 ret = fb->fb_compat_ioctl(info, cmd, arg);
1335 break;
1336 }
1337 return ret;
1338}
1339#endif
1340
1341static int
1342fb_mmap(struct file *file, struct vm_area_struct * vma)
1343{
1344 struct fb_info *info = file_fb_info(file);
1345 struct fb_ops *fb;
1346 unsigned long mmio_pgoff;
1347 unsigned long start;
1348 u32 len;
1349
1350 if (!info)
1351 return -ENODEV;
1352 fb = info->fbops;
1353 mutex_lock(&info->mm_lock);
1354 if (fb->fb_mmap) {
1355 int res;
1356
1357
1358
1359
1360
1361 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
1362 res = fb->fb_mmap(info, vma);
1363 mutex_unlock(&info->mm_lock);
1364 return res;
1365 }
1366
1367
1368
1369
1370
1371 start = info->fix.smem_start;
1372 len = info->fix.smem_len;
1373 mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT;
1374 if (vma->vm_pgoff >= mmio_pgoff) {
1375 if (info->var.accel_flags) {
1376 mutex_unlock(&info->mm_lock);
1377 return -EINVAL;
1378 }
1379
1380 vma->vm_pgoff -= mmio_pgoff;
1381 start = info->fix.mmio_start;
1382 len = info->fix.mmio_len;
1383 }
1384 mutex_unlock(&info->mm_lock);
1385
1386 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
1387
1388
1389
1390
1391 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
1392 fb_pgprotect(file, vma, start);
1393
1394 return vm_iomap_memory(vma, start, len);
1395}
1396
1397static int
1398fb_open(struct inode *inode, struct file *file)
1399__acquires(&info->lock)
1400__releases(&info->lock)
1401{
1402 int fbidx = iminor(inode);
1403 struct fb_info *info;
1404 int res = 0;
1405
1406 info = get_fb_info(fbidx);
1407 if (!info) {
1408 request_module("fb%d", fbidx);
1409 info = get_fb_info(fbidx);
1410 if (!info)
1411 return -ENODEV;
1412 }
1413 if (IS_ERR(info))
1414 return PTR_ERR(info);
1415
1416 lock_fb_info(info);
1417 if (!try_module_get(info->fbops->owner)) {
1418 res = -ENODEV;
1419 goto out;
1420 }
1421 file->private_data = info;
1422 if (info->fbops->fb_open) {
1423 res = info->fbops->fb_open(info,1);
1424 if (res)
1425 module_put(info->fbops->owner);
1426 }
1427#ifdef CONFIG_FB_DEFERRED_IO
1428 if (info->fbdefio)
1429 fb_deferred_io_open(info, inode, file);
1430#endif
1431out:
1432 unlock_fb_info(info);
1433 if (res)
1434 put_fb_info(info);
1435 return res;
1436}
1437
1438static int
1439fb_release(struct inode *inode, struct file *file)
1440__acquires(&info->lock)
1441__releases(&info->lock)
1442{
1443 struct fb_info * const info = file->private_data;
1444
1445 lock_fb_info(info);
1446 if (info->fbops->fb_release)
1447 info->fbops->fb_release(info,1);
1448 module_put(info->fbops->owner);
1449 unlock_fb_info(info);
1450 put_fb_info(info);
1451 return 0;
1452}
1453
1454#if defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && !defined(CONFIG_MMU)
1455unsigned long get_fb_unmapped_area(struct file *filp,
1456 unsigned long addr, unsigned long len,
1457 unsigned long pgoff, unsigned long flags)
1458{
1459 struct fb_info * const info = filp->private_data;
1460 unsigned long fb_size = PAGE_ALIGN(info->fix.smem_len);
1461
1462 if (pgoff > fb_size || len > fb_size - pgoff)
1463 return -EINVAL;
1464
1465 return (unsigned long)info->screen_base + pgoff;
1466}
1467#endif
1468
1469static const struct file_operations fb_fops = {
1470 .owner = THIS_MODULE,
1471 .read = fb_read,
1472 .write = fb_write,
1473 .unlocked_ioctl = fb_ioctl,
1474#ifdef CONFIG_COMPAT
1475 .compat_ioctl = fb_compat_ioctl,
1476#endif
1477 .mmap = fb_mmap,
1478 .open = fb_open,
1479 .release = fb_release,
1480#if defined(HAVE_ARCH_FB_UNMAPPED_AREA) || \
1481 (defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && \
1482 !defined(CONFIG_MMU))
1483 .get_unmapped_area = get_fb_unmapped_area,
1484#endif
1485#ifdef CONFIG_FB_DEFERRED_IO
1486 .fsync = fb_deferred_io_fsync,
1487#endif
1488 .llseek = default_llseek,
1489};
1490
1491struct class *fb_class;
1492EXPORT_SYMBOL(fb_class);
1493
1494static int fb_check_foreignness(struct fb_info *fi)
1495{
1496 const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
1497
1498 fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
1499
1500#ifdef __BIG_ENDIAN
1501 fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
1502#else
1503 fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
1504#endif
1505
1506 if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
1507 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1508 "support this framebuffer\n", fi->fix.id);
1509 return -ENOSYS;
1510 } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
1511 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1512 "support this framebuffer\n", fi->fix.id);
1513 return -ENOSYS;
1514 }
1515
1516 return 0;
1517}
1518
1519static bool apertures_overlap(struct aperture *gen, struct aperture *hw)
1520{
1521
1522 if (gen->base == hw->base)
1523 return true;
1524
1525 if (gen->base > hw->base && gen->base < hw->base + hw->size)
1526 return true;
1527 return false;
1528}
1529
1530static bool fb_do_apertures_overlap(struct apertures_struct *gena,
1531 struct apertures_struct *hwa)
1532{
1533 int i, j;
1534 if (!hwa || !gena)
1535 return false;
1536
1537 for (i = 0; i < hwa->count; ++i) {
1538 struct aperture *h = &hwa->ranges[i];
1539 for (j = 0; j < gena->count; ++j) {
1540 struct aperture *g = &gena->ranges[j];
1541 printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n",
1542 (unsigned long long)g->base,
1543 (unsigned long long)g->size,
1544 (unsigned long long)h->base,
1545 (unsigned long long)h->size);
1546 if (apertures_overlap(g, h))
1547 return true;
1548 }
1549 }
1550
1551 return false;
1552}
1553
1554static void do_unregister_framebuffer(struct fb_info *fb_info);
1555
1556#define VGA_FB_PHYS 0xA0000
1557static void do_remove_conflicting_framebuffers(struct apertures_struct *a,
1558 const char *name, bool primary)
1559{
1560 int i;
1561
1562
1563 for_each_registered_fb(i) {
1564 struct apertures_struct *gen_aper;
1565
1566 if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE))
1567 continue;
1568
1569 gen_aper = registered_fb[i]->apertures;
1570 if (fb_do_apertures_overlap(gen_aper, a) ||
1571 (primary && gen_aper && gen_aper->count &&
1572 gen_aper->ranges[0].base == VGA_FB_PHYS)) {
1573
1574 printk(KERN_INFO "fb%d: switching to %s from %s\n",
1575 i, name, registered_fb[i]->fix.id);
1576 do_unregister_framebuffer(registered_fb[i]);
1577 }
1578 }
1579}
1580
1581static bool lockless_register_fb;
1582module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400);
1583MODULE_PARM_DESC(lockless_register_fb,
1584 "Lockless framebuffer registration for debugging [default=off]");
1585
1586static int do_register_framebuffer(struct fb_info *fb_info)
1587{
1588 int i, ret;
1589 struct fb_videomode mode;
1590
1591 if (fb_check_foreignness(fb_info))
1592 return -ENOSYS;
1593
1594 do_remove_conflicting_framebuffers(fb_info->apertures,
1595 fb_info->fix.id,
1596 fb_is_primary_device(fb_info));
1597
1598 if (num_registered_fb == FB_MAX)
1599 return -ENXIO;
1600
1601 num_registered_fb++;
1602 for (i = 0 ; i < FB_MAX; i++)
1603 if (!registered_fb[i])
1604 break;
1605 fb_info->node = i;
1606 atomic_set(&fb_info->count, 1);
1607 mutex_init(&fb_info->lock);
1608 mutex_init(&fb_info->mm_lock);
1609
1610 fb_info->dev = device_create(fb_class, fb_info->device,
1611 MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1612 if (IS_ERR(fb_info->dev)) {
1613
1614 printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1615 fb_info->dev = NULL;
1616 } else
1617 fb_init_device(fb_info);
1618
1619 if (fb_info->pixmap.addr == NULL) {
1620 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1621 if (fb_info->pixmap.addr) {
1622 fb_info->pixmap.size = FBPIXMAPSIZE;
1623 fb_info->pixmap.buf_align = 1;
1624 fb_info->pixmap.scan_align = 1;
1625 fb_info->pixmap.access_align = 32;
1626 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1627 }
1628 }
1629 fb_info->pixmap.offset = 0;
1630
1631 if (!fb_info->pixmap.blit_x)
1632 fb_info->pixmap.blit_x = ~(u32)0;
1633
1634 if (!fb_info->pixmap.blit_y)
1635 fb_info->pixmap.blit_y = ~(u32)0;
1636
1637 if (!fb_info->modelist.prev || !fb_info->modelist.next)
1638 INIT_LIST_HEAD(&fb_info->modelist);
1639
1640 if (fb_info->skip_vt_switch)
1641 pm_vt_switch_required(fb_info->dev, false);
1642 else
1643 pm_vt_switch_required(fb_info->dev, true);
1644
1645 fb_var_to_videomode(&mode, &fb_info->var);
1646 fb_add_videomode(&mode, &fb_info->modelist);
1647 registered_fb[i] = fb_info;
1648
1649#ifdef CONFIG_GUMSTIX_AM200EPD
1650 {
1651 struct fb_event event;
1652 event.info = fb_info;
1653 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
1654 }
1655#endif
1656
1657 if (!lockless_register_fb)
1658 console_lock();
1659 else
1660 atomic_inc(&ignore_console_lock_warning);
1661 lock_fb_info(fb_info);
1662 ret = fbcon_fb_registered(fb_info);
1663 unlock_fb_info(fb_info);
1664
1665 if (!lockless_register_fb)
1666 console_unlock();
1667 else
1668 atomic_dec(&ignore_console_lock_warning);
1669 return ret;
1670}
1671
1672static void unbind_console(struct fb_info *fb_info)
1673{
1674 int i = fb_info->node;
1675
1676 if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
1677 return;
1678
1679 console_lock();
1680 lock_fb_info(fb_info);
1681 fbcon_fb_unbind(fb_info);
1682 unlock_fb_info(fb_info);
1683 console_unlock();
1684}
1685
1686void unlink_framebuffer(struct fb_info *fb_info)
1687{
1688 int i;
1689
1690 i = fb_info->node;
1691 if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
1692 return;
1693
1694 if (!fb_info->dev)
1695 return;
1696
1697 device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1698
1699 pm_vt_switch_unregister(fb_info->dev);
1700
1701 unbind_console(fb_info);
1702
1703 fb_info->dev = NULL;
1704}
1705EXPORT_SYMBOL(unlink_framebuffer);
1706
1707static void do_unregister_framebuffer(struct fb_info *fb_info)
1708{
1709 unlink_framebuffer(fb_info);
1710 if (fb_info->pixmap.addr &&
1711 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1712 kfree(fb_info->pixmap.addr);
1713 fb_destroy_modelist(&fb_info->modelist);
1714 registered_fb[fb_info->node] = NULL;
1715 num_registered_fb--;
1716 fb_cleanup_device(fb_info);
1717#ifdef CONFIG_GUMSTIX_AM200EPD
1718 {
1719 struct fb_event event;
1720 event.info = fb_info;
1721 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
1722 }
1723#endif
1724 console_lock();
1725 fbcon_fb_unregistered(fb_info);
1726 console_unlock();
1727
1728
1729 put_fb_info(fb_info);
1730}
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742int remove_conflicting_framebuffers(struct apertures_struct *a,
1743 const char *name, bool primary)
1744{
1745 bool do_free = false;
1746
1747 if (!a) {
1748 a = alloc_apertures(1);
1749 if (!a)
1750 return -ENOMEM;
1751
1752 a->ranges[0].base = 0;
1753 a->ranges[0].size = ~0;
1754 do_free = true;
1755 }
1756
1757 mutex_lock(®istration_lock);
1758 do_remove_conflicting_framebuffers(a, name, primary);
1759 mutex_unlock(®istration_lock);
1760
1761 if (do_free)
1762 kfree(a);
1763
1764 return 0;
1765}
1766EXPORT_SYMBOL(remove_conflicting_framebuffers);
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id, const char *name)
1781{
1782 struct apertures_struct *ap;
1783 bool primary = false;
1784 int err, idx, bar;
1785 bool res_id_found = false;
1786
1787 for (idx = 0, bar = 0; bar < PCI_ROM_RESOURCE; bar++) {
1788 if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM))
1789 continue;
1790 idx++;
1791 }
1792
1793 ap = alloc_apertures(idx);
1794 if (!ap)
1795 return -ENOMEM;
1796
1797 for (idx = 0, bar = 0; bar < PCI_ROM_RESOURCE; bar++) {
1798 if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM))
1799 continue;
1800 ap->ranges[idx].base = pci_resource_start(pdev, bar);
1801 ap->ranges[idx].size = pci_resource_len(pdev, bar);
1802 pci_info(pdev, "%s: bar %d: 0x%lx -> 0x%lx\n", __func__, bar,
1803 (unsigned long)pci_resource_start(pdev, bar),
1804 (unsigned long)pci_resource_end(pdev, bar));
1805 idx++;
1806 if (res_id == bar)
1807 res_id_found = true;
1808 }
1809 if (!res_id_found)
1810 pci_warn(pdev, "%s: passed res_id (%d) is not a memory bar\n",
1811 __func__, res_id);
1812
1813#ifdef CONFIG_X86
1814 primary = pdev->resource[PCI_ROM_RESOURCE].flags &
1815 IORESOURCE_ROM_SHADOW;
1816#endif
1817 err = remove_conflicting_framebuffers(ap, name, primary);
1818 kfree(ap);
1819 return err;
1820}
1821EXPORT_SYMBOL(remove_conflicting_pci_framebuffers);
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832int
1833register_framebuffer(struct fb_info *fb_info)
1834{
1835 int ret;
1836
1837 mutex_lock(®istration_lock);
1838 ret = do_register_framebuffer(fb_info);
1839 mutex_unlock(®istration_lock);
1840
1841 return ret;
1842}
1843EXPORT_SYMBOL(register_framebuffer);
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861void
1862unregister_framebuffer(struct fb_info *fb_info)
1863{
1864 mutex_lock(®istration_lock);
1865 do_unregister_framebuffer(fb_info);
1866 mutex_unlock(®istration_lock);
1867}
1868EXPORT_SYMBOL(unregister_framebuffer);
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879void fb_set_suspend(struct fb_info *info, int state)
1880{
1881 WARN_CONSOLE_UNLOCKED();
1882
1883 if (state) {
1884 fbcon_suspended(info);
1885 info->state = FBINFO_STATE_SUSPENDED;
1886 } else {
1887 info->state = FBINFO_STATE_RUNNING;
1888 fbcon_resumed(info);
1889 }
1890}
1891EXPORT_SYMBOL(fb_set_suspend);
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902static int __init
1903fbmem_init(void)
1904{
1905 int ret;
1906
1907 if (!proc_create_seq("fb", 0, NULL, &proc_fb_seq_ops))
1908 return -ENOMEM;
1909
1910 ret = register_chrdev(FB_MAJOR, "fb", &fb_fops);
1911 if (ret) {
1912 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1913 goto err_chrdev;
1914 }
1915
1916 fb_class = class_create(THIS_MODULE, "graphics");
1917 if (IS_ERR(fb_class)) {
1918 ret = PTR_ERR(fb_class);
1919 pr_warn("Unable to create fb class; errno = %d\n", ret);
1920 fb_class = NULL;
1921 goto err_class;
1922 }
1923
1924 fb_console_init();
1925
1926 return 0;
1927
1928err_class:
1929 unregister_chrdev(FB_MAJOR, "fb");
1930err_chrdev:
1931 remove_proc_entry("fb", NULL);
1932 return ret;
1933}
1934
1935#ifdef MODULE
1936module_init(fbmem_init);
1937static void __exit
1938fbmem_exit(void)
1939{
1940 fb_console_exit();
1941
1942 remove_proc_entry("fb", NULL);
1943 class_destroy(fb_class);
1944 unregister_chrdev(FB_MAJOR, "fb");
1945}
1946
1947module_exit(fbmem_exit);
1948MODULE_LICENSE("GPL");
1949MODULE_DESCRIPTION("Framebuffer base");
1950#else
1951subsys_initcall(fbmem_init);
1952#endif
1953
1954int fb_new_modelist(struct fb_info *info)
1955{
1956 struct fb_var_screeninfo var = info->var;
1957 struct list_head *pos, *n;
1958 struct fb_modelist *modelist;
1959 struct fb_videomode *m, mode;
1960 int err = 1;
1961
1962 list_for_each_safe(pos, n, &info->modelist) {
1963 modelist = list_entry(pos, struct fb_modelist, list);
1964 m = &modelist->mode;
1965 fb_videomode_to_var(&var, m);
1966 var.activate = FB_ACTIVATE_TEST;
1967 err = fb_set_var(info, &var);
1968 fb_var_to_videomode(&mode, &var);
1969 if (err || !fb_mode_is_equal(m, &mode)) {
1970 list_del(pos);
1971 kfree(pos);
1972 }
1973 }
1974
1975 if (list_empty(&info->modelist))
1976 return 1;
1977
1978 fbcon_new_modelist(info);
1979
1980 return 0;
1981}
1982
1983MODULE_LICENSE("GPL");
1984