Line data Source code
1 : /*
2 : * linux/drivers/video/fbmem.c
3 : *
4 : * Copyright (C) 1994 Martin Schaller
5 : *
6 : * 2001 - Documented with DocBook
7 : * - Brad Douglas <brad@neruo.com>
8 : *
9 : * This file is subject to the terms and conditions of the GNU General Public
10 : * License. See the file COPYING in the main directory of this archive
11 : * for more details.
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 :
36 : #include <asm/fb.h>
37 :
38 :
39 : /*
40 : * Frame buffer device initialization and setup routines
41 : */
42 :
43 : #define FBPIXMAPSIZE (1024 * 8)
44 :
45 : struct fb_info *registered_fb[FB_MAX] __read_mostly;
46 : int num_registered_fb __read_mostly;
47 :
48 : int lock_fb_info(struct fb_info *info)
49 : {
50 62 : mutex_lock(&info->lock);
51 186 : if (!info->fbops) {
52 62 : mutex_unlock(&info->lock);
53 62 : return 0;
54 : }
55 62 : return 1;
56 : }
57 : EXPORT_SYMBOL(lock_fb_info);
58 :
59 : /*
60 : * Helpers
61 : */
62 :
63 : int fb_get_color_depth(struct fb_var_screeninfo *var,
64 : struct fb_fix_screeninfo *fix)
65 0 : {
66 0 : int depth = 0;
67 :
68 0 : if (fix->visual == FB_VISUAL_MONO01 ||
69 : fix->visual == FB_VISUAL_MONO10)
70 0 : depth = 1;
71 : else {
72 0 : if (var->green.length == var->blue.length &&
73 : var->green.length == var->red.length &&
74 : var->green.offset == var->blue.offset &&
75 : var->green.offset == var->red.offset)
76 0 : depth = var->green.length;
77 : else
78 0 : depth = var->green.length + var->red.length +
79 : var->blue.length;
80 : }
81 :
82 0 : return depth;
83 : }
84 : EXPORT_SYMBOL(fb_get_color_depth);
85 :
86 : /*
87 : * Data padding functions.
88 : */
89 : void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
90 : {
91 0 : __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
92 0 : }
93 : EXPORT_SYMBOL(fb_pad_aligned_buffer);
94 :
95 : void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
96 : u32 shift_high, u32 shift_low, u32 mod)
97 : {
98 0 : u8 mask = (u8) (0xfff << shift_high), tmp;
99 0 : int i, j;
100 0 :
101 0 : for (i = height; i--; ) {
102 0 : for (j = 0; j < idx; j++) {
103 0 : tmp = dst[j];
104 0 : tmp &= mask;
105 0 : tmp |= *src >> shift_low;
106 0 : dst[j] = tmp;
107 0 : tmp = *src << shift_high;
108 0 : dst[j+1] = tmp;
109 0 : src++;
110 : }
111 0 : tmp = dst[idx];
112 0 : tmp &= mask;
113 0 : tmp |= *src >> shift_low;
114 0 : dst[idx] = tmp;
115 0 : if (shift_high < mod) {
116 0 : tmp = *src << shift_high;
117 0 : dst[idx+1] = tmp;
118 : }
119 0 : src++;
120 0 : dst += d_pitch;
121 0 : }
122 : }
123 : EXPORT_SYMBOL(fb_pad_unaligned_buffer);
124 :
125 : /*
126 : * we need to lock this section since fb_cursor
127 : * may use fb_imageblit()
128 : */
129 : char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
130 : {
131 0 : u32 align = buf->buf_align - 1, offset;
132 0 : char *addr = buf->addr;
133 0 :
134 : /* If IO mapped, we need to sync before access, no sharing of
135 : * the pixmap is done
136 : */
137 0 : if (buf->flags & FB_PIXMAP_IO) {
138 0 : if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
139 0 : info->fbops->fb_sync(info);
140 0 : return addr;
141 : }
142 :
143 : /* See if we fit in the remaining pixmap space */
144 0 : offset = buf->offset + align;
145 0 : offset &= ~align;
146 0 : if (offset + size > buf->size) {
147 : /* We do not fit. In order to be able to re-use the buffer,
148 : * we must ensure no asynchronous DMA'ing or whatever operation
149 : * is in progress, we sync for that.
150 : */
151 0 : if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
152 0 : info->fbops->fb_sync(info);
153 0 : offset = 0;
154 : }
155 0 : buf->offset = offset + size;
156 0 : addr += offset;
157 :
158 0 : return addr;
159 : }
160 :
161 : #ifdef CONFIG_LOGO
162 :
163 : static inline unsigned safe_shift(unsigned d, int n)
164 : {
165 : return n < 0 ? d >> -n : d << n;
166 : }
167 :
168 : static void fb_set_logocmap(struct fb_info *info,
169 : const struct linux_logo *logo)
170 : {
171 : struct fb_cmap palette_cmap;
172 : u16 palette_green[16];
173 : u16 palette_blue[16];
174 : u16 palette_red[16];
175 : int i, j, n;
176 : const unsigned char *clut = logo->clut;
177 :
178 : palette_cmap.start = 0;
179 : palette_cmap.len = 16;
180 : palette_cmap.red = palette_red;
181 : palette_cmap.green = palette_green;
182 : palette_cmap.blue = palette_blue;
183 : palette_cmap.transp = NULL;
184 :
185 : for (i = 0; i < logo->clutsize; i += n) {
186 : n = logo->clutsize - i;
187 : /* palette_cmap provides space for only 16 colors at once */
188 : if (n > 16)
189 : n = 16;
190 : palette_cmap.start = 32 + i;
191 : palette_cmap.len = n;
192 : for (j = 0; j < n; ++j) {
193 : palette_cmap.red[j] = clut[0] << 8 | clut[0];
194 : palette_cmap.green[j] = clut[1] << 8 | clut[1];
195 : palette_cmap.blue[j] = clut[2] << 8 | clut[2];
196 : clut += 3;
197 : }
198 : fb_set_cmap(&palette_cmap, info);
199 : }
200 : }
201 :
202 : static void fb_set_logo_truepalette(struct fb_info *info,
203 : const struct linux_logo *logo,
204 : u32 *palette)
205 : {
206 : static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
207 : unsigned char redmask, greenmask, bluemask;
208 : int redshift, greenshift, blueshift;
209 : int i;
210 : const unsigned char *clut = logo->clut;
211 :
212 : /*
213 : * We have to create a temporary palette since console palette is only
214 : * 16 colors long.
215 : */
216 : /* Bug: Doesn't obey msb_right ... (who needs that?) */
217 : redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
218 : greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
219 : bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
220 : redshift = info->var.red.offset - (8 - info->var.red.length);
221 : greenshift = info->var.green.offset - (8 - info->var.green.length);
222 : blueshift = info->var.blue.offset - (8 - info->var.blue.length);
223 :
224 : for ( i = 0; i < logo->clutsize; i++) {
225 : palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
226 : safe_shift((clut[1] & greenmask), greenshift) |
227 : safe_shift((clut[2] & bluemask), blueshift));
228 : clut += 3;
229 : }
230 : }
231 :
232 : static void fb_set_logo_directpalette(struct fb_info *info,
233 : const struct linux_logo *logo,
234 : u32 *palette)
235 : {
236 : int redshift, greenshift, blueshift;
237 : int i;
238 :
239 : redshift = info->var.red.offset;
240 : greenshift = info->var.green.offset;
241 : blueshift = info->var.blue.offset;
242 :
243 : for (i = 32; i < 32 + logo->clutsize; i++)
244 : palette[i] = i << redshift | i << greenshift | i << blueshift;
245 : }
246 :
247 : static void fb_set_logo(struct fb_info *info,
248 : const struct linux_logo *logo, u8 *dst,
249 : int depth)
250 : {
251 : int i, j, k;
252 : const u8 *src = logo->data;
253 : u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
254 : u8 fg = 1, d;
255 :
256 : switch (fb_get_color_depth(&info->var, &info->fix)) {
257 : case 1:
258 : fg = 1;
259 : break;
260 : case 2:
261 : fg = 3;
262 : break;
263 : default:
264 : fg = 7;
265 : break;
266 : }
267 :
268 : if (info->fix.visual == FB_VISUAL_MONO01 ||
269 : info->fix.visual == FB_VISUAL_MONO10)
270 : fg = ~((u8) (0xfff << info->var.green.length));
271 :
272 : switch (depth) {
273 : case 4:
274 : for (i = 0; i < logo->height; i++)
275 : for (j = 0; j < logo->width; src++) {
276 : *dst++ = *src >> 4;
277 : j++;
278 : if (j < logo->width) {
279 : *dst++ = *src & 0x0f;
280 : j++;
281 : }
282 : }
283 : break;
284 : case 1:
285 : for (i = 0; i < logo->height; i++) {
286 : for (j = 0; j < logo->width; src++) {
287 : d = *src ^ xor;
288 : for (k = 7; k >= 0; k--) {
289 : *dst++ = ((d >> k) & 1) ? fg : 0;
290 : j++;
291 : }
292 : }
293 : }
294 : break;
295 : }
296 : }
297 :
298 : /*
299 : * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
300 : * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
301 : * the visual format and color depth of the framebuffer, the DAC, the
302 : * pseudo_palette, and the logo data will be adjusted accordingly.
303 : *
304 : * Case 1 - linux_logo_clut224:
305 : * Color exceeds the number of console colors (16), thus we set the hardware DAC
306 : * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
307 : *
308 : * For visuals that require color info from the pseudo_palette, we also construct
309 : * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
310 : * will be set.
311 : *
312 : * Case 2 - linux_logo_vga16:
313 : * The number of colors just matches the console colors, thus there is no need
314 : * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
315 : * each byte contains color information for two pixels (upper and lower nibble).
316 : * To be consistent with fb_imageblit() usage, we therefore separate the two
317 : * nibbles into separate bytes. The "depth" flag will be set to 4.
318 : *
319 : * Case 3 - linux_logo_mono:
320 : * This is similar with Case 2. Each byte contains information for 8 pixels.
321 : * We isolate each bit and expand each into a byte. The "depth" flag will
322 : * be set to 1.
323 : */
324 : static struct logo_data {
325 : int depth;
326 : int needs_directpalette;
327 : int needs_truepalette;
328 : int needs_cmapreset;
329 : const struct linux_logo *logo;
330 : } fb_logo __read_mostly;
331 :
332 : static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
333 : {
334 : u32 size = width * height, i;
335 :
336 : out += size - 1;
337 :
338 : for (i = size; i--; )
339 : *out-- = *in++;
340 : }
341 :
342 : static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
343 : {
344 : int i, j, h = height - 1;
345 :
346 : for (i = 0; i < height; i++)
347 : for (j = 0; j < width; j++)
348 : out[height * j + h - i] = *in++;
349 : }
350 :
351 : static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
352 : {
353 : int i, j, w = width - 1;
354 :
355 : for (i = 0; i < height; i++)
356 : for (j = 0; j < width; j++)
357 : out[height * (w - j) + i] = *in++;
358 : }
359 :
360 : static void fb_rotate_logo(struct fb_info *info, u8 *dst,
361 : struct fb_image *image, int rotate)
362 : {
363 : u32 tmp;
364 :
365 : if (rotate == FB_ROTATE_UD) {
366 : fb_rotate_logo_ud(image->data, dst, image->width,
367 : image->height);
368 : image->dx = info->var.xres - image->width - image->dx;
369 : image->dy = info->var.yres - image->height - image->dy;
370 : } else if (rotate == FB_ROTATE_CW) {
371 : fb_rotate_logo_cw(image->data, dst, image->width,
372 : image->height);
373 : tmp = image->width;
374 : image->width = image->height;
375 : image->height = tmp;
376 : tmp = image->dy;
377 : image->dy = image->dx;
378 : image->dx = info->var.xres - image->width - tmp;
379 : } else if (rotate == FB_ROTATE_CCW) {
380 : fb_rotate_logo_ccw(image->data, dst, image->width,
381 : image->height);
382 : tmp = image->width;
383 : image->width = image->height;
384 : image->height = tmp;
385 : tmp = image->dx;
386 : image->dx = image->dy;
387 : image->dy = info->var.yres - image->height - tmp;
388 : }
389 :
390 : image->data = dst;
391 : }
392 :
393 : static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
394 : int rotate, unsigned int num)
395 : {
396 : unsigned int x;
397 :
398 : if (rotate == FB_ROTATE_UR) {
399 : for (x = 0;
400 : x < num && image->dx + image->width <= info->var.xres;
401 : x++) {
402 : info->fbops->fb_imageblit(info, image);
403 : image->dx += image->width + 8;
404 : }
405 : } else if (rotate == FB_ROTATE_UD) {
406 : for (x = 0; x < num && image->dx >= 0; x++) {
407 : info->fbops->fb_imageblit(info, image);
408 : image->dx -= image->width + 8;
409 : }
410 : } else if (rotate == FB_ROTATE_CW) {
411 : for (x = 0;
412 : x < num && image->dy + image->height <= info->var.yres;
413 : x++) {
414 : info->fbops->fb_imageblit(info, image);
415 : image->dy += image->height + 8;
416 : }
417 : } else if (rotate == FB_ROTATE_CCW) {
418 : for (x = 0; x < num && image->dy >= 0; x++) {
419 : info->fbops->fb_imageblit(info, image);
420 : image->dy -= image->height + 8;
421 : }
422 : }
423 : }
424 :
425 : static int fb_show_logo_line(struct fb_info *info, int rotate,
426 : const struct linux_logo *logo, int y,
427 : unsigned int n)
428 : {
429 : u32 *palette = NULL, *saved_pseudo_palette = NULL;
430 : unsigned char *logo_new = NULL, *logo_rotate = NULL;
431 : struct fb_image image;
432 :
433 : /* Return if the frame buffer is not mapped or suspended */
434 : if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
435 : info->flags & FBINFO_MODULE)
436 : return 0;
437 :
438 : image.depth = 8;
439 : image.data = logo->data;
440 :
441 : if (fb_logo.needs_cmapreset)
442 : fb_set_logocmap(info, logo);
443 :
444 : if (fb_logo.needs_truepalette ||
445 : fb_logo.needs_directpalette) {
446 : palette = kmalloc(256 * 4, GFP_KERNEL);
447 : if (palette == NULL)
448 : return 0;
449 :
450 : if (fb_logo.needs_truepalette)
451 : fb_set_logo_truepalette(info, logo, palette);
452 : else
453 : fb_set_logo_directpalette(info, logo, palette);
454 :
455 : saved_pseudo_palette = info->pseudo_palette;
456 : info->pseudo_palette = palette;
457 : }
458 :
459 : if (fb_logo.depth <= 4) {
460 : logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL);
461 : if (logo_new == NULL) {
462 : kfree(palette);
463 : if (saved_pseudo_palette)
464 : info->pseudo_palette = saved_pseudo_palette;
465 : return 0;
466 : }
467 : image.data = logo_new;
468 : fb_set_logo(info, logo, logo_new, fb_logo.depth);
469 : }
470 :
471 : image.dx = 0;
472 : image.dy = y;
473 : image.width = logo->width;
474 : image.height = logo->height;
475 :
476 : if (rotate) {
477 : logo_rotate = kmalloc(logo->width *
478 : logo->height, GFP_KERNEL);
479 : if (logo_rotate)
480 : fb_rotate_logo(info, logo_rotate, &image, rotate);
481 : }
482 :
483 : fb_do_show_logo(info, &image, rotate, n);
484 :
485 : kfree(palette);
486 : if (saved_pseudo_palette != NULL)
487 : info->pseudo_palette = saved_pseudo_palette;
488 : kfree(logo_new);
489 : kfree(logo_rotate);
490 : return logo->height;
491 : }
492 :
493 :
494 : #ifdef CONFIG_FB_LOGO_EXTRA
495 :
496 : #define FB_LOGO_EX_NUM_MAX 10
497 : static struct logo_data_extra {
498 : const struct linux_logo *logo;
499 : unsigned int n;
500 : } fb_logo_ex[FB_LOGO_EX_NUM_MAX];
501 : static unsigned int fb_logo_ex_num;
502 :
503 : void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
504 : {
505 : if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
506 : return;
507 :
508 : fb_logo_ex[fb_logo_ex_num].logo = logo;
509 : fb_logo_ex[fb_logo_ex_num].n = n;
510 : fb_logo_ex_num++;
511 : }
512 :
513 : static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
514 : unsigned int yres)
515 : {
516 : unsigned int i;
517 :
518 : /* FIXME: logo_ex supports only truecolor fb. */
519 : if (info->fix.visual != FB_VISUAL_TRUECOLOR)
520 : fb_logo_ex_num = 0;
521 :
522 : for (i = 0; i < fb_logo_ex_num; i++) {
523 : if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
524 : fb_logo_ex[i].logo = NULL;
525 : continue;
526 : }
527 : height += fb_logo_ex[i].logo->height;
528 : if (height > yres) {
529 : height -= fb_logo_ex[i].logo->height;
530 : fb_logo_ex_num = i;
531 : break;
532 : }
533 : }
534 : return height;
535 : }
536 :
537 : static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
538 : {
539 : unsigned int i;
540 :
541 : for (i = 0; i < fb_logo_ex_num; i++)
542 : y += fb_show_logo_line(info, rotate,
543 : fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
544 :
545 : return y;
546 : }
547 :
548 : #else /* !CONFIG_FB_LOGO_EXTRA */
549 :
550 : static inline int fb_prepare_extra_logos(struct fb_info *info,
551 : unsigned int height,
552 : unsigned int yres)
553 : {
554 : return height;
555 : }
556 :
557 : static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
558 : {
559 : return y;
560 : }
561 :
562 : #endif /* CONFIG_FB_LOGO_EXTRA */
563 :
564 :
565 : int fb_prepare_logo(struct fb_info *info, int rotate)
566 : {
567 : int depth = fb_get_color_depth(&info->var, &info->fix);
568 : unsigned int yres;
569 :
570 : memset(&fb_logo, 0, sizeof(struct logo_data));
571 :
572 : if (info->flags & FBINFO_MISC_TILEBLITTING ||
573 : info->flags & FBINFO_MODULE)
574 : return 0;
575 :
576 : if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
577 : depth = info->var.blue.length;
578 : if (info->var.red.length < depth)
579 : depth = info->var.red.length;
580 : if (info->var.green.length < depth)
581 : depth = info->var.green.length;
582 : }
583 :
584 : if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
585 : /* assume console colormap */
586 : depth = 4;
587 : }
588 :
589 : /* Return if no suitable logo was found */
590 : fb_logo.logo = fb_find_logo(depth);
591 :
592 : if (!fb_logo.logo) {
593 : return 0;
594 : }
595 :
596 : if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
597 : yres = info->var.yres;
598 : else
599 : yres = info->var.xres;
600 :
601 : if (fb_logo.logo->height > yres) {
602 : fb_logo.logo = NULL;
603 : return 0;
604 : }
605 :
606 : /* What depth we asked for might be different from what we get */
607 : if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
608 : fb_logo.depth = 8;
609 : else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
610 : fb_logo.depth = 4;
611 : else
612 : fb_logo.depth = 1;
613 :
614 :
615 : if (fb_logo.depth > 4 && depth > 4) {
616 : switch (info->fix.visual) {
617 : case FB_VISUAL_TRUECOLOR:
618 : fb_logo.needs_truepalette = 1;
619 : break;
620 : case FB_VISUAL_DIRECTCOLOR:
621 : fb_logo.needs_directpalette = 1;
622 : fb_logo.needs_cmapreset = 1;
623 : break;
624 : case FB_VISUAL_PSEUDOCOLOR:
625 : fb_logo.needs_cmapreset = 1;
626 : break;
627 : }
628 : }
629 :
630 : return fb_prepare_extra_logos(info, fb_logo.logo->height, yres);
631 : }
632 :
633 : int fb_show_logo(struct fb_info *info, int rotate)
634 : {
635 : int y;
636 :
637 : y = fb_show_logo_line(info, rotate, fb_logo.logo, 0,
638 : num_online_cpus());
639 : y = fb_show_extra_logos(info, y, rotate);
640 :
641 : return y;
642 : }
643 : #else
644 0 : int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
645 0 : int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
646 : #endif /* CONFIG_LOGO */
647 :
648 : static void *fb_seq_start(struct seq_file *m, loff_t *pos)
649 : {
650 6 : return (*pos < FB_MAX) ? pos : NULL;
651 : }
652 :
653 : static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
654 : {
655 1 : (*pos)++;
656 6 : return (*pos < FB_MAX) ? pos : NULL;
657 : }
658 :
659 : static void fb_seq_stop(struct seq_file *m, void *v)
660 : {
661 1 : }
662 :
663 : static int fb_seq_show(struct seq_file *m, void *v)
664 : {
665 2 : int i = *(loff_t *)v;
666 2 : struct fb_info *fi = registered_fb[i];
667 :
668 2 : if (fi)
669 1 : seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
670 1 : return 0;
671 : }
672 :
673 1 : static const struct seq_operations proc_fb_seq_ops = {
674 : .start = fb_seq_start,
675 : .next = fb_seq_next,
676 : .stop = fb_seq_stop,
677 : .show = fb_seq_show,
678 : };
679 :
680 : static int proc_fb_open(struct inode *inode, struct file *file)
681 : {
682 4 : return seq_open(file, &proc_fb_seq_ops);
683 : }
684 :
685 1 : static const struct file_operations fb_proc_fops = {
686 : .owner = THIS_MODULE,
687 : .open = proc_fb_open,
688 : .read = seq_read,
689 : .llseek = seq_lseek,
690 : .release = seq_release,
691 : };
692 :
693 : static ssize_t
694 : fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
695 : {
696 2 : unsigned long p = *ppos;
697 2 : struct inode *inode = file->f_path.dentry->d_inode;
698 4 : int fbidx = iminor(inode);
699 2 : struct fb_info *info = registered_fb[fbidx];
700 1 : u32 *buffer, *dst;
701 1 : u32 __iomem *src;
702 3 : int c, i, cnt = 0, err = 0;
703 1 : unsigned long total_size;
704 1 :
705 6 : if (!info || ! info->screen_base)
706 2 : return -ENODEV;
707 1 :
708 3 : if (info->state != FBINFO_STATE_RUNNING)
709 2 : return -EPERM;
710 1 :
711 4 : if (info->fbops->fb_read)
712 3 : return info->fbops->fb_read(info, buf, count, ppos);
713 1 :
714 2 : total_size = info->screen_size;
715 1 :
716 3 : if (total_size == 0)
717 2 : total_size = info->fix.smem_len;
718 1 :
719 3 : if (p >= total_size)
720 1 : return 0;
721 :
722 2 : if (count >= total_size)
723 1 : count = total_size;
724 :
725 2 : if (count + p > total_size)
726 1 : count = total_size - p;
727 :
728 8 : buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
729 : GFP_KERNEL);
730 2 : if (!buffer)
731 1 : return -ENOMEM;
732 :
733 1 : src = (u32 __iomem *) (info->screen_base + p);
734 :
735 3 : if (info->fbops->fb_sync)
736 1 : info->fbops->fb_sync(info);
737 :
738 3 : while (count) {
739 7 : c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
740 2 : dst = buffer;
741 6 : for (i = c >> 2; i--; )
742 7 : *dst++ = fb_readl(src++);
743 3 : if (c & 3) {
744 3 : u8 *dst8 = (u8 *) dst;
745 1 : u8 __iomem *src8 = (u8 __iomem *) src;
746 :
747 6 : for (i = c & 3; i--;)
748 7 : *dst8++ = fb_readb(src8++);
749 1 :
750 2 : src = (u32 __iomem *) src8;
751 : }
752 :
753 6 : if (copy_to_user(buf, buffer, c)) {
754 1 : err = -EFAULT;
755 1 : break;
756 : }
757 1 : *ppos += c;
758 1 : buf += c;
759 1 : cnt += c;
760 1 : count -= c;
761 1 : }
762 :
763 2 : kfree(buffer);
764 :
765 12 : return (err) ? err : cnt;
766 : }
767 :
768 : static ssize_t
769 : fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
770 : {
771 2 : unsigned long p = *ppos;
772 2 : struct inode *inode = file->f_path.dentry->d_inode;
773 4 : int fbidx = iminor(inode);
774 2 : struct fb_info *info = registered_fb[fbidx];
775 1 : u32 *buffer, *src;
776 1 : u32 __iomem *dst;
777 3 : int c, i, cnt = 0, err = 0;
778 1 : unsigned long total_size;
779 1 :
780 6 : if (!info || !info->screen_base)
781 2 : return -ENODEV;
782 1 :
783 3 : if (info->state != FBINFO_STATE_RUNNING)
784 2 : return -EPERM;
785 1 :
786 4 : if (info->fbops->fb_write)
787 3 : return info->fbops->fb_write(info, buf, count, ppos);
788 1 :
789 2 : total_size = info->screen_size;
790 1 :
791 3 : if (total_size == 0)
792 2 : total_size = info->fix.smem_len;
793 1 :
794 3 : if (p > total_size)
795 1 : return -EFBIG;
796 :
797 2 : if (count > total_size) {
798 1 : err = -EFBIG;
799 1 : count = total_size;
800 : }
801 :
802 2 : if (count + p > total_size) {
803 2 : if (!err)
804 1 : err = -ENOSPC;
805 :
806 1 : count = total_size - p;
807 : }
808 :
809 8 : buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
810 : GFP_KERNEL);
811 2 : if (!buffer)
812 1 : return -ENOMEM;
813 :
814 1 : dst = (u32 __iomem *) (info->screen_base + p);
815 :
816 3 : if (info->fbops->fb_sync)
817 1 : info->fbops->fb_sync(info);
818 :
819 3 : while (count) {
820 7 : c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
821 2 : src = buffer;
822 :
823 5 : if (copy_from_user(src, buf, c)) {
824 1 : err = -EFAULT;
825 2 : break;
826 : }
827 :
828 6 : for (i = c >> 2; i--; )
829 7 : fb_writel(*src++, dst++);
830 1 :
831 3 : if (c & 3) {
832 1 : u8 *src8 = (u8 *) src;
833 1 : u8 __iomem *dst8 = (u8 __iomem *) dst;
834 :
835 6 : for (i = c & 3; i--; )
836 7 : fb_writeb(*src8++, dst8++);
837 1 :
838 2 : dst = (u32 __iomem *) dst8;
839 : }
840 :
841 2 : *ppos += c;
842 2 : buf += c;
843 2 : cnt += c;
844 2 : count -= c;
845 2 : }
846 :
847 2 : kfree(buffer);
848 :
849 12 : return (cnt) ? cnt : err;
850 : }
851 :
852 : int
853 : fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
854 : {
855 60 : struct fb_fix_screeninfo *fix = &info->fix;
856 60 : unsigned int yres = info->var.yres;
857 60 : int err = 0;
858 :
859 60 : if (var->yoffset > 0) {
860 60 : if (var->vmode & FB_VMODE_YWRAP) {
861 180 : if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
862 30 : err = -EINVAL;
863 : else
864 30 : yres = 0;
865 180 : } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
866 30 : err = -EINVAL;
867 : }
868 :
869 240 : if (var->xoffset > 0 && (!fix->xpanstep ||
870 : (var->xoffset % fix->xpanstep)))
871 30 : err = -EINVAL;
872 :
873 270 : if (err || !info->fbops->fb_pan_display ||
874 : var->yoffset > info->var.yres_virtual - yres ||
875 : var->xoffset > info->var.xres_virtual - info->var.xres)
876 30 : return -EINVAL;
877 :
878 90 : if ((err = info->fbops->fb_pan_display(var, info)))
879 30 : return err;
880 30 : info->var.xoffset = var->xoffset;
881 30 : info->var.yoffset = var->yoffset;
882 60 : if (var->vmode & FB_VMODE_YWRAP)
883 30 : info->var.vmode |= FB_VMODE_YWRAP;
884 : else
885 30 : info->var.vmode &= ~FB_VMODE_YWRAP;
886 30 : return 0;
887 : }
888 :
889 : static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
890 : u32 activate)
891 12 : {
892 12 : struct fb_event event;
893 12 : struct fb_blit_caps caps, fbcaps;
894 24 : int err = 0;
895 :
896 12 : memset(&caps, 0, sizeof(caps));
897 12 : memset(&fbcaps, 0, sizeof(fbcaps));
898 12 : caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
899 12 : event.info = info;
900 12 : event.data = ∩︀
901 12 : fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
902 12 : info->fbops->fb_get_caps(info, &fbcaps, var);
903 :
904 72 : if (((fbcaps.x ^ caps.x) & caps.x) ||
905 : ((fbcaps.y ^ caps.y) & caps.y) ||
906 : (fbcaps.len < caps.len))
907 12 : err = -EINVAL;
908 :
909 12 : return err;
910 : }
911 :
912 : int
913 : fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
914 : {
915 24 : int flags = info->flags;
916 24 : int ret = 0;
917 12 :
918 36 : if (var->activate & FB_ACTIVATE_INV_MODE) {
919 12 : struct fb_videomode mode1, mode2;
920 12 :
921 36 : fb_var_to_videomode(&mode1, var);
922 36 : fb_var_to_videomode(&mode2, &info->var);
923 12 : /* make sure we don't delete the videomode of current var */
924 36 : ret = fb_mode_is_equal(&mode1, &mode2);
925 12 :
926 36 : if (!ret) {
927 : struct fb_event event;
928 :
929 12 : event.info = info;
930 12 : event.data = &mode1;
931 12 : ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
932 : }
933 :
934 24 : if (!ret)
935 24 : fb_delete_videomode(&mode1, &info->modelist);
936 :
937 :
938 144 : ret = (ret) ? -EINVAL : 0;
939 24 : goto done;
940 : }
941 :
942 72 : if ((var->activate & FB_ACTIVATE_FORCE) ||
943 12 : memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
944 12 : u32 activate = var->activate;
945 :
946 36 : if (!info->fbops->fb_check_var) {
947 12 : *var = info->var;
948 12 : goto done;
949 : }
950 :
951 12 : ret = info->fbops->fb_check_var(var, info);
952 :
953 24 : if (ret)
954 12 : goto done;
955 :
956 24 : if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
957 : struct fb_var_screeninfo old_var;
958 : struct fb_videomode mode;
959 :
960 36 : if (info->fbops->fb_get_caps) {
961 24 : ret = fb_check_caps(info, var, activate);
962 :
963 24 : if (ret)
964 12 : goto done;
965 : }
966 :
967 24 : old_var = info->var;
968 24 : info->var = *var;
969 :
970 72 : if (info->fbops->fb_set_par) {
971 24 : ret = info->fbops->fb_set_par(info);
972 :
973 48 : if (ret) {
974 24 : info->var = old_var;
975 24 : printk(KERN_WARNING "detected "
976 : "fb_set_par error, "
977 : "error code: %d\n", ret);
978 24 : goto done;
979 : }
980 : }
981 :
982 48 : fb_pan_display(info, &info->var);
983 48 : fb_set_cmap(&info->cmap, info);
984 24 : fb_var_to_videomode(&mode, &info->var);
985 :
986 96 : if (info->modelist.prev && info->modelist.next &&
987 : !list_empty(&info->modelist))
988 60 : ret = fb_add_videomode(&mode, &info->modelist);
989 :
990 144 : if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
991 : struct fb_event event;
992 216 : int evnt = (activate & FB_ACTIVATE_ALL) ?
993 : FB_EVENT_MODE_CHANGE_ALL :
994 : FB_EVENT_MODE_CHANGE;
995 :
996 36 : info->flags &= ~FBINFO_MISC_USEREVENT;
997 36 : event.info = info;
998 36 : event.data = &mode;
999 36 : fb_notifier_call_chain(evnt, &event);
1000 : }
1001 : }
1002 : }
1003 :
1004 : done:
1005 84 : return ret;
1006 : }
1007 :
1008 : int
1009 : fb_blank(struct fb_info *info, int blank)
1010 : {
1011 60 : int ret = -EINVAL;
1012 6 :
1013 12 : if (blank > FB_BLANK_POWERDOWN)
1014 6 : blank = FB_BLANK_POWERDOWN;
1015 :
1016 18 : if (info->fbops->fb_blank)
1017 6 : ret = info->fbops->fb_blank(blank, info);
1018 :
1019 12 : if (!ret) {
1020 : struct fb_event event;
1021 :
1022 6 : event.info = info;
1023 6 : event.data = ␣
1024 6 : fb_notifier_call_chain(FB_EVENT_BLANK, &event);
1025 : }
1026 :
1027 6 : return ret;
1028 : }
1029 :
1030 : static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
1031 : unsigned long arg)
1032 5 : {
1033 5 : struct fb_ops *fb;
1034 5 : struct fb_var_screeninfo var;
1035 5 : struct fb_fix_screeninfo fix;
1036 5 : struct fb_con2fbmap con2fb;
1037 5 : struct fb_cmap cmap_from;
1038 5 : struct fb_cmap_user cmap;
1039 5 : struct fb_event event;
1040 10 : void __user *argp = (void __user *)arg;
1041 10 : long ret = 0;
1042 5 :
1043 5 : switch (cmd) {
1044 20 : case FBIOGET_VSCREENINFO:
1045 25 : if (!lock_fb_info(info))
1046 10 : return -ENODEV;
1047 10 : var = info->var;
1048 15 : unlock_fb_info(info);
1049 5 :
1050 45 : ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0;
1051 10 : break;
1052 25 : case FBIOPUT_VSCREENINFO:
1053 30 : if (copy_from_user(&var, argp, sizeof(var)))
1054 10 : return -EFAULT;
1055 25 : if (!lock_fb_info(info))
1056 10 : return -ENODEV;
1057 10 : acquire_console_sem();
1058 10 : info->flags |= FBINFO_MISC_USEREVENT;
1059 50 : ret = fb_set_var(info, &var);
1060 10 : info->flags &= ~FBINFO_MISC_USEREVENT;
1061 10 : release_console_sem();
1062 15 : unlock_fb_info(info);
1063 35 : if (!ret && copy_to_user(argp, &var, sizeof(var)))
1064 10 : ret = -EFAULT;
1065 15 : break;
1066 25 : case FBIOGET_FSCREENINFO:
1067 25 : if (!lock_fb_info(info))
1068 5 : return -ENODEV;
1069 5 : fix = info->fix;
1070 10 : unlock_fb_info(info);
1071 :
1072 40 : ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0;
1073 5 : break;
1074 20 : case FBIOPUTCMAP:
1075 25 : if (copy_from_user(&cmap, argp, sizeof(cmap)))
1076 5 : return -EFAULT;
1077 20 : ret = fb_set_user_cmap(&cmap, info);
1078 5 : break;
1079 20 : case FBIOGETCMAP:
1080 25 : if (copy_from_user(&cmap, argp, sizeof(cmap)))
1081 5 : return -EFAULT;
1082 20 : if (!lock_fb_info(info))
1083 5 : return -ENODEV;
1084 5 : cmap_from = info->cmap;
1085 10 : unlock_fb_info(info);
1086 35 : ret = fb_cmap_to_user(&cmap_from, &cmap);
1087 5 : break;
1088 20 : case FBIOPAN_DISPLAY:
1089 25 : if (copy_from_user(&var, argp, sizeof(var)))
1090 5 : return -EFAULT;
1091 20 : if (!lock_fb_info(info))
1092 5 : return -ENODEV;
1093 5 : acquire_console_sem();
1094 15 : ret = fb_pan_display(info, &var);
1095 5 : release_console_sem();
1096 10 : unlock_fb_info(info);
1097 30 : if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
1098 5 : return -EFAULT;
1099 10 : break;
1100 20 : case FBIO_CURSOR:
1101 5 : ret = -EINVAL;
1102 5 : break;
1103 20 : case FBIOGET_CON2FBMAP:
1104 25 : if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1105 5 : return -EFAULT;
1106 10 : if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1107 5 : return -EINVAL;
1108 5 : con2fb.framebuffer = -1;
1109 5 : event.data = &con2fb;
1110 20 : if (!lock_fb_info(info))
1111 5 : return -ENODEV;
1112 5 : event.info = info;
1113 5 : fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
1114 10 : unlock_fb_info(info);
1115 40 : ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
1116 5 : break;
1117 20 : case FBIOPUT_CON2FBMAP:
1118 25 : if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1119 5 : return -EFAULT;
1120 10 : if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1121 5 : return -EINVAL;
1122 10 : if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
1123 5 : return -EINVAL;
1124 10 : if (!registered_fb[con2fb.framebuffer])
1125 10 : request_module("fb%d", con2fb.framebuffer);
1126 20 : if (!registered_fb[con2fb.framebuffer]) {
1127 10 : ret = -EINVAL;
1128 10 : break;
1129 : }
1130 10 : event.data = &con2fb;
1131 30 : if (!lock_fb_info(info))
1132 5 : return -ENODEV;
1133 5 : event.info = info;
1134 10 : ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
1135 10 : unlock_fb_info(info);
1136 5 : break;
1137 20 : case FBIOBLANK:
1138 20 : if (!lock_fb_info(info))
1139 5 : return -ENODEV;
1140 5 : acquire_console_sem();
1141 5 : info->flags |= FBINFO_MISC_USEREVENT;
1142 15 : ret = fb_blank(info, arg);
1143 5 : info->flags &= ~FBINFO_MISC_USEREVENT;
1144 5 : release_console_sem();
1145 10 : unlock_fb_info(info);
1146 5 : break;
1147 10 : default:
1148 25 : if (!lock_fb_info(info))
1149 5 : return -ENODEV;
1150 5 : fb = info->fbops;
1151 15 : if (fb->fb_ioctl)
1152 10 : ret = fb->fb_ioctl(info, cmd, arg);
1153 : else
1154 5 : ret = -ENOTTY;
1155 10 : unlock_fb_info(info);
1156 : }
1157 80 : return ret;
1158 : }
1159 5 :
1160 : static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1161 : {
1162 2 : struct inode *inode = file->f_path.dentry->d_inode;
1163 4 : int fbidx = iminor(inode);
1164 2 : struct fb_info *info = registered_fb[fbidx];
1165 1 :
1166 32 : return do_fb_ioctl(info, cmd, arg);
1167 : }
1168 1 :
1169 : #ifdef CONFIG_COMPAT
1170 : struct fb_fix_screeninfo32 {
1171 : char id[16];
1172 : compat_caddr_t smem_start;
1173 : u32 smem_len;
1174 : u32 type;
1175 : u32 type_aux;
1176 : u32 visual;
1177 : u16 xpanstep;
1178 : u16 ypanstep;
1179 : u16 ywrapstep;
1180 : u32 line_length;
1181 : compat_caddr_t mmio_start;
1182 : u32 mmio_len;
1183 : u32 accel;
1184 : u16 reserved[3];
1185 : };
1186 1 :
1187 : struct fb_cmap32 {
1188 : u32 start;
1189 : u32 len;
1190 : compat_caddr_t red;
1191 : compat_caddr_t green;
1192 : compat_caddr_t blue;
1193 : compat_caddr_t transp;
1194 : };
1195 :
1196 : static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
1197 : unsigned long arg)
1198 1 : {
1199 1 : struct fb_cmap_user __user *cmap;
1200 1 : struct fb_cmap32 __user *cmap32;
1201 1 : __u32 data;
1202 1 : int err;
1203 1 :
1204 3 : cmap = compat_alloc_user_space(sizeof(*cmap));
1205 4 : cmap32 = compat_ptr(arg);
1206 1 :
1207 4 : if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1208 2 : return -EFAULT;
1209 1 :
1210 10 : if (get_user(data, &cmap32->red) ||
1211 14 : put_user(compat_ptr(data), &cmap->red) ||
1212 11 : get_user(data, &cmap32->green) ||
1213 14 : put_user(compat_ptr(data), &cmap->green) ||
1214 11 : get_user(data, &cmap32->blue) ||
1215 14 : put_user(compat_ptr(data), &cmap->blue) ||
1216 11 : get_user(data, &cmap32->transp) ||
1217 30 : put_user(compat_ptr(data), &cmap->transp))
1218 10 : return -EFAULT;
1219 1 :
1220 32 : err = do_fb_ioctl(info, cmd, (unsigned long) cmap);
1221 1 :
1222 3 : if (!err) {
1223 4 : if (copy_in_user(&cmap32->start,
1224 1 : &cmap->start,
1225 1 : 2 * sizeof(__u32)))
1226 2 : err = -EFAULT;
1227 : }
1228 1 : return err;
1229 : }
1230 :
1231 : static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1232 : struct fb_fix_screeninfo32 __user *fix32)
1233 1 : {
1234 1 : __u32 data;
1235 1 : int err;
1236 1 :
1237 3 : err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1238 1 :
1239 3 : data = (__u32) (unsigned long) fix->smem_start;
1240 11 : err |= put_user(data, &fix32->smem_start);
1241 2 :
1242 11 : err |= put_user(fix->smem_len, &fix32->smem_len);
1243 12 : err |= put_user(fix->type, &fix32->type);
1244 12 : err |= put_user(fix->type_aux, &fix32->type_aux);
1245 12 : err |= put_user(fix->visual, &fix32->visual);
1246 11 : err |= put_user(fix->xpanstep, &fix32->xpanstep);
1247 11 : err |= put_user(fix->ypanstep, &fix32->ypanstep);
1248 11 : err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1249 12 : err |= put_user(fix->line_length, &fix32->line_length);
1250 2 :
1251 3 : data = (__u32) (unsigned long) fix->mmio_start;
1252 11 : err |= put_user(data, &fix32->mmio_start);
1253 2 :
1254 11 : err |= put_user(fix->mmio_len, &fix32->mmio_len);
1255 12 : err |= put_user(fix->accel, &fix32->accel);
1256 5 : err |= copy_to_user(fix32->reserved, fix->reserved,
1257 1 : sizeof(fix->reserved));
1258 1 :
1259 2 : return err;
1260 : }
1261 :
1262 : static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
1263 : unsigned long arg)
1264 1 : {
1265 1 : mm_segment_t old_fs;
1266 1 : struct fb_fix_screeninfo fix;
1267 1 : struct fb_fix_screeninfo32 __user *fix32;
1268 1 : int err;
1269 1 :
1270 4 : fix32 = compat_ptr(arg);
1271 1 :
1272 4 : old_fs = get_fs();
1273 5 : set_fs(KERNEL_DS);
1274 31 : err = do_fb_ioctl(info, cmd, (unsigned long) &fix);
1275 3 : set_fs(old_fs);
1276 :
1277 2 : if (!err)
1278 2 : err = do_fscreeninfo_to_user(&fix, fix32);
1279 :
1280 2 : return err;
1281 : }
1282 :
1283 : static long fb_compat_ioctl(struct file *file, unsigned int cmd,
1284 : unsigned long arg)
1285 1 : {
1286 2 : struct inode *inode = file->f_path.dentry->d_inode;
1287 4 : int fbidx = iminor(inode);
1288 2 : struct fb_info *info = registered_fb[fbidx];
1289 2 : struct fb_ops *fb = info->fbops;
1290 2 : long ret = -ENOIOCTLCMD;
1291 1 :
1292 1 : switch(cmd) {
1293 4 : case FBIOGET_VSCREENINFO:
1294 4 : case FBIOPUT_VSCREENINFO:
1295 3 : case FBIOPAN_DISPLAY:
1296 3 : case FBIOGET_CON2FBMAP:
1297 3 : case FBIOPUT_CON2FBMAP:
1298 3 : arg = (unsigned long) compat_ptr(arg);
1299 3 : case FBIOBLANK:
1300 61 : ret = do_fb_ioctl(info, cmd, arg);
1301 1 : break;
1302 1 :
1303 3 : case FBIOGET_FSCREENINFO:
1304 4 : ret = fb_get_fscreeninfo(info, cmd, arg);
1305 1 : break;
1306 1 :
1307 4 : case FBIOGETCMAP:
1308 3 : case FBIOPUTCMAP:
1309 12 : ret = fb_getput_cmap(info, cmd, arg);
1310 1 : break;
1311 1 :
1312 1 : default:
1313 4 : if (fb->fb_compat_ioctl)
1314 3 : ret = fb->fb_compat_ioctl(info, cmd, arg);
1315 2 : break;
1316 1 : }
1317 5 : return ret;
1318 : }
1319 : #endif
1320 :
1321 : static int
1322 : fb_mmap(struct file *file, struct vm_area_struct * vma)
1323 : {
1324 5 : int fbidx = iminor(file->f_path.dentry->d_inode);
1325 2 : struct fb_info *info = registered_fb[fbidx];
1326 2 : struct fb_ops *fb = info->fbops;
1327 1 : unsigned long off;
1328 1 : unsigned long start;
1329 1 : u32 len;
1330 1 :
1331 3 : if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1332 2 : return -EINVAL;
1333 1 : off = vma->vm_pgoff << PAGE_SHIFT;
1334 2 : if (!fb)
1335 1 : return -ENODEV;
1336 1 : mutex_lock(&info->mm_lock);
1337 3 : if (fb->fb_mmap) {
1338 : int res;
1339 1 : res = fb->fb_mmap(info, vma);
1340 1 : mutex_unlock(&info->mm_lock);
1341 1 : return res;
1342 : }
1343 :
1344 : /* frame buffer memory */
1345 1 : start = info->fix.smem_start;
1346 1 : len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1347 2 : if (off >= len) {
1348 : /* memory mapped io */
1349 1 : off -= len;
1350 2 : if (info->var.accel_flags) {
1351 1 : mutex_unlock(&info->mm_lock);
1352 1 : return -EINVAL;
1353 : }
1354 1 : start = info->fix.mmio_start;
1355 1 : len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1356 : }
1357 1 : mutex_unlock(&info->mm_lock);
1358 1 : start &= PAGE_MASK;
1359 2 : if ((vma->vm_end - vma->vm_start + off) > len)
1360 1 : return -EINVAL;
1361 1 : off += start;
1362 1 : vma->vm_pgoff = off >> PAGE_SHIFT;
1363 : /* This is an IO map - tell maydump to skip this VMA */
1364 1 : vma->vm_flags |= VM_IO | VM_RESERVED;
1365 2 : fb_pgprotect(file, vma, off);
1366 3 : if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
1367 : vma->vm_end - vma->vm_start, vma->vm_page_prot))
1368 1 : return -EAGAIN;
1369 1 : return 0;
1370 : }
1371 :
1372 : static int
1373 : fb_open(struct inode *inode, struct file *file)
1374 : __acquires(&info->lock)
1375 1 : __releases(&info->lock)
1376 1 : {
1377 4 : int fbidx = iminor(inode);
1378 1 : struct fb_info *info;
1379 2 : int res = 0;
1380 :
1381 2 : if (fbidx >= FB_MAX)
1382 1 : return -ENODEV;
1383 1 : info = registered_fb[fbidx];
1384 2 : if (!info)
1385 2 : request_module("fb%d", fbidx);
1386 2 : info = registered_fb[fbidx];
1387 4 : if (!info)
1388 2 : return -ENODEV;
1389 2 : mutex_lock(&info->lock);
1390 6 : if (!try_module_get(info->fbops->owner)) {
1391 1 : res = -ENODEV;
1392 1 : goto out;
1393 : }
1394 1 : file->private_data = info;
1395 3 : if (info->fbops->fb_open) {
1396 1 : res = info->fbops->fb_open(info,1);
1397 2 : if (res)
1398 2 : module_put(info->fbops->owner);
1399 : }
1400 : #ifdef CONFIG_FB_DEFERRED_IO
1401 : if (info->fbdefio)
1402 : fb_deferred_io_open(info, inode, file);
1403 : #endif
1404 : out:
1405 2 : mutex_unlock(&info->lock);
1406 4 : return res;
1407 : }
1408 :
1409 : static int
1410 : fb_release(struct inode *inode, struct file *file)
1411 : __acquires(&info->lock)
1412 1 : __releases(&info->lock)
1413 : {
1414 2 : struct fb_info * const info = file->private_data;
1415 :
1416 1 : mutex_lock(&info->lock);
1417 3 : if (info->fbops->fb_release)
1418 1 : info->fbops->fb_release(info,1);
1419 2 : module_put(info->fbops->owner);
1420 1 : mutex_unlock(&info->lock);
1421 1 : return 0;
1422 : }
1423 :
1424 1 : static const struct file_operations fb_fops = {
1425 : .owner = THIS_MODULE,
1426 : .read = fb_read,
1427 : .write = fb_write,
1428 : .unlocked_ioctl = fb_ioctl,
1429 : #ifdef CONFIG_COMPAT
1430 : .compat_ioctl = fb_compat_ioctl,
1431 : #endif
1432 : .mmap = fb_mmap,
1433 : .open = fb_open,
1434 : .release = fb_release,
1435 : #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1436 : .get_unmapped_area = get_fb_unmapped_area,
1437 : #endif
1438 : #ifdef CONFIG_FB_DEFERRED_IO
1439 : .fsync = fb_deferred_io_fsync,
1440 : #endif
1441 : };
1442 :
1443 : struct class *fb_class;
1444 : EXPORT_SYMBOL(fb_class);
1445 :
1446 : static int fb_check_foreignness(struct fb_info *fi)
1447 : {
1448 0 : const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
1449 0 :
1450 0 : fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
1451 0 :
1452 : #ifdef __BIG_ENDIAN
1453 : fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
1454 : #else
1455 0 : fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
1456 : #endif /* __BIG_ENDIAN */
1457 :
1458 0 : if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
1459 0 : pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1460 : "support this framebuffer\n", fi->fix.id);
1461 0 : return -ENOSYS;
1462 0 : } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
1463 0 : pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1464 : "support this framebuffer\n", fi->fix.id);
1465 0 : return -ENOSYS;
1466 : }
1467 :
1468 0 : return 0;
1469 : }
1470 :
1471 : static bool fb_do_apertures_overlap(struct fb_info *gen, struct fb_info *hw)
1472 : {
1473 : /* is the generic aperture base the same as the HW one */
1474 0 : if (gen->aperture_base == hw->aperture_base)
1475 0 : return true;
1476 : /* is the generic aperture base inside the hw base->hw base+size */
1477 0 : if (gen->aperture_base > hw->aperture_base && gen->aperture_base <= hw->aperture_base + hw->aperture_size)
1478 0 : return true;
1479 0 : return false;
1480 : }
1481 : /**
1482 : * register_framebuffer - registers a frame buffer device
1483 : * @fb_info: frame buffer info structure
1484 : *
1485 : * Registers a frame buffer device @fb_info.
1486 : *
1487 : * Returns negative errno on error, or zero for success.
1488 : *
1489 : */
1490 :
1491 : int
1492 : register_framebuffer(struct fb_info *fb_info)
1493 : {
1494 0 : int i;
1495 0 : struct fb_event event;
1496 0 : struct fb_videomode mode;
1497 0 :
1498 0 : if (num_registered_fb == FB_MAX)
1499 0 : return -ENXIO;
1500 0 :
1501 0 : if (fb_check_foreignness(fb_info))
1502 0 : return -ENOSYS;
1503 0 :
1504 0 : /* check all firmware fbs and kick off if the base addr overlaps */
1505 0 : for (i = 0 ; i < FB_MAX; i++) {
1506 0 : if (!registered_fb[i])
1507 0 : continue;
1508 :
1509 0 : if (registered_fb[i]->flags & FBINFO_MISC_FIRMWARE) {
1510 0 : if (fb_do_apertures_overlap(registered_fb[i], fb_info)) {
1511 0 : printk(KERN_ERR "fb: conflicting fb hw usage "
1512 : "%s vs %s - removing generic driver\n",
1513 : fb_info->fix.id,
1514 : registered_fb[i]->fix.id);
1515 0 : unregister_framebuffer(registered_fb[i]);
1516 0 : break;
1517 : }
1518 : }
1519 : }
1520 :
1521 0 : num_registered_fb++;
1522 0 : for (i = 0 ; i < FB_MAX; i++)
1523 0 : if (!registered_fb[i])
1524 0 : break;
1525 0 : fb_info->node = i;
1526 0 : mutex_init(&fb_info->lock);
1527 0 : mutex_init(&fb_info->mm_lock);
1528 0 :
1529 0 : fb_info->dev = device_create(fb_class, fb_info->device,
1530 : MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1531 0 : if (IS_ERR(fb_info->dev)) {
1532 : /* Not fatal */
1533 0 : printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1534 0 : fb_info->dev = NULL;
1535 : } else
1536 0 : fb_init_device(fb_info);
1537 :
1538 0 : if (fb_info->pixmap.addr == NULL) {
1539 0 : fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1540 0 : if (fb_info->pixmap.addr) {
1541 0 : fb_info->pixmap.size = FBPIXMAPSIZE;
1542 0 : fb_info->pixmap.buf_align = 1;
1543 0 : fb_info->pixmap.scan_align = 1;
1544 0 : fb_info->pixmap.access_align = 32;
1545 0 : fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1546 : }
1547 : }
1548 0 : fb_info->pixmap.offset = 0;
1549 :
1550 0 : if (!fb_info->pixmap.blit_x)
1551 0 : fb_info->pixmap.blit_x = ~(u32)0;
1552 :
1553 0 : if (!fb_info->pixmap.blit_y)
1554 0 : fb_info->pixmap.blit_y = ~(u32)0;
1555 :
1556 0 : if (!fb_info->modelist.prev || !fb_info->modelist.next)
1557 0 : INIT_LIST_HEAD(&fb_info->modelist);
1558 :
1559 0 : fb_var_to_videomode(&mode, &fb_info->var);
1560 0 : fb_add_videomode(&mode, &fb_info->modelist);
1561 0 : registered_fb[i] = fb_info;
1562 :
1563 0 : event.info = fb_info;
1564 0 : if (!lock_fb_info(fb_info))
1565 0 : return -ENODEV;
1566 0 : fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
1567 0 : unlock_fb_info(fb_info);
1568 0 : return 0;
1569 : }
1570 :
1571 :
1572 : /**
1573 : * unregister_framebuffer - releases a frame buffer device
1574 : * @fb_info: frame buffer info structure
1575 : *
1576 : * Unregisters a frame buffer device @fb_info.
1577 : *
1578 : * Returns negative errno on error, or zero for success.
1579 : *
1580 : * This function will also notify the framebuffer console
1581 : * to release the driver.
1582 : *
1583 : * This is meant to be called within a driver's module_exit()
1584 : * function. If this is called outside module_exit(), ensure
1585 : * that the driver implements fb_open() and fb_release() to
1586 : * check that no processes are using the device.
1587 : */
1588 :
1589 : int
1590 : unregister_framebuffer(struct fb_info *fb_info)
1591 : {
1592 0 : struct fb_event event;
1593 0 : int i, ret = 0;
1594 0 :
1595 0 : i = fb_info->node;
1596 0 : if (!registered_fb[i]) {
1597 0 : ret = -EINVAL;
1598 0 : goto done;
1599 : }
1600 :
1601 :
1602 0 : if (!lock_fb_info(fb_info))
1603 0 : return -ENODEV;
1604 0 : event.info = fb_info;
1605 0 : ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
1606 0 : unlock_fb_info(fb_info);
1607 :
1608 0 : if (ret) {
1609 0 : ret = -EINVAL;
1610 0 : goto done;
1611 : }
1612 :
1613 0 : if (fb_info->pixmap.addr &&
1614 : (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1615 0 : kfree(fb_info->pixmap.addr);
1616 0 : fb_destroy_modelist(&fb_info->modelist);
1617 0 : registered_fb[i]=NULL;
1618 0 : num_registered_fb--;
1619 0 : fb_cleanup_device(fb_info);
1620 0 : device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1621 0 : event.info = fb_info;
1622 0 : fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
1623 :
1624 : /* this may free fb info */
1625 0 : if (fb_info->fbops->fb_destroy)
1626 0 : fb_info->fbops->fb_destroy(fb_info);
1627 : done:
1628 0 : return ret;
1629 : }
1630 :
1631 0 : /**
1632 : * fb_set_suspend - low level driver signals suspend
1633 : * @info: framebuffer affected
1634 : * @state: 0 = resuming, !=0 = suspending
1635 : *
1636 : * This is meant to be used by low level drivers to
1637 : * signal suspend/resume to the core & clients.
1638 : * It must be called with the console semaphore held
1639 : */
1640 : void fb_set_suspend(struct fb_info *info, int state)
1641 : {
1642 1 : struct fb_event event;
1643 1 :
1644 4 : if (!lock_fb_info(info))
1645 1 : return;
1646 1 : event.info = info;
1647 2 : if (state) {
1648 1 : fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
1649 1 : info->state = FBINFO_STATE_SUSPENDED;
1650 : } else {
1651 1 : info->state = FBINFO_STATE_RUNNING;
1652 1 : fb_notifier_call_chain(FB_EVENT_RESUME, &event);
1653 : }
1654 2 : unlock_fb_info(info);
1655 1 : }
1656 :
1657 : /**
1658 : * fbmem_init - init frame buffer subsystem
1659 : *
1660 : * Initialize the frame buffer subsystem.
1661 : *
1662 : * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1663 : *
1664 : */
1665 :
1666 : static int __init
1667 : fbmem_init(void)
1668 : {
1669 3 : proc_create("fb", 0, NULL, &fb_proc_fops);
1670 1 :
1671 5 : if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1672 2 : printk("unable to get major %d for fb devs\n", FB_MAJOR);
1673 1 :
1674 2 : fb_class = class_create(THIS_MODULE, "graphics");
1675 4 : if (IS_ERR(fb_class)) {
1676 3 : printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1677 1 : fb_class = NULL;
1678 : }
1679 2 : return 0;
1680 : }
1681 :
1682 : #ifdef MODULE
1683 : module_init(fbmem_init);
1684 : static void __exit
1685 : fbmem_exit(void)
1686 : {
1687 : remove_proc_entry("fb", NULL);
1688 : class_destroy(fb_class);
1689 : unregister_chrdev(FB_MAJOR, "fb");
1690 : }
1691 :
1692 : module_exit(fbmem_exit);
1693 : MODULE_LICENSE("GPL");
1694 : MODULE_DESCRIPTION("Framebuffer base");
1695 : #else
1696 : subsys_initcall(fbmem_init);
1697 : #endif
1698 :
1699 : int fb_new_modelist(struct fb_info *info)
1700 : {
1701 1 : struct fb_event event;
1702 2 : struct fb_var_screeninfo var = info->var;
1703 1 : struct list_head *pos, *n;
1704 1 : struct fb_modelist *modelist;
1705 1 : struct fb_videomode *m, mode;
1706 2 : int err = 1;
1707 1 :
1708 12 : list_for_each_safe(pos, n, &info->modelist) {
1709 7 : modelist = list_entry(pos, struct fb_modelist, list);
1710 3 : m = &modelist->mode;
1711 3 : fb_videomode_to_var(&var, m);
1712 2 : var.activate = FB_ACTIVATE_TEST;
1713 8 : err = fb_set_var(info, &var);
1714 2 : fb_var_to_videomode(&mode, &var);
1715 6 : if (err || !fb_mode_is_equal(m, &mode)) {
1716 4 : list_del(pos);
1717 2 : kfree(pos);
1718 : }
1719 : }
1720 :
1721 1 : err = 1;
1722 :
1723 4 : if (!list_empty(&info->modelist)) {
1724 4 : if (!lock_fb_info(info))
1725 1 : return -ENODEV;
1726 1 : event.info = info;
1727 1 : err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
1728 2 : unlock_fb_info(info);
1729 : }
1730 :
1731 2 : return err;
1732 : }
1733 :
1734 1 : static char *video_options[FB_MAX] __read_mostly;
1735 1 : static int ofonly __read_mostly;
1736 :
1737 : /**
1738 : * fb_get_options - get kernel boot parameters
1739 : * @name: framebuffer name as it would appear in
1740 : * the boot parameter line
1741 : * (video=<name>:<options>)
1742 : * @option: the option will be stored here
1743 : *
1744 : * NOTE: Needed to maintain backwards compatibility
1745 : */
1746 : int fb_get_options(char *name, char **option)
1747 : {
1748 0 : char *opt, *options = NULL;
1749 0 : int opt_len, retval = 0;
1750 0 : int name_len = strlen(name), i;
1751 0 :
1752 0 : if (name_len && ofonly && strncmp(name, "offb", 4))
1753 0 : retval = 1;
1754 0 :
1755 0 : if (name_len && !retval) {
1756 0 : for (i = 0; i < FB_MAX; i++) {
1757 0 : if (video_options[i] == NULL)
1758 0 : continue;
1759 0 : opt_len = strlen(video_options[i]);
1760 0 : if (!opt_len)
1761 0 : continue;
1762 0 : opt = video_options[i];
1763 0 : if (!strncmp(name, opt, name_len) &&
1764 : opt[name_len] == ':')
1765 0 : options = opt + name_len + 1;
1766 : }
1767 : }
1768 0 : if (options && !strncmp(options, "off", 3))
1769 0 : retval = 1;
1770 :
1771 0 : if (option)
1772 0 : *option = options;
1773 :
1774 0 : return retval;
1775 : }
1776 :
1777 : #ifndef MODULE
1778 : /**
1779 : * video_setup - process command line options
1780 : * @options: string of options
1781 : *
1782 : * Process command line options for frame buffer subsystem.
1783 : *
1784 : * NOTE: This function is a __setup and __init function.
1785 : * It only stores the options. Drivers have to call
1786 : * fb_get_options() as necessary.
1787 : *
1788 : * Returns zero.
1789 : *
1790 : */
1791 : static int __init video_setup(char *options)
1792 : {
1793 2 : int i, global = 0;
1794 1 :
1795 5 : if (!options || !*options)
1796 2 : global = 1;
1797 :
1798 5 : if (!global && !strncmp(options, "ofonly", 6)) {
1799 1 : ofonly = 1;
1800 1 : global = 1;
1801 : }
1802 :
1803 5 : if (!global && !strchr(options, ':')) {
1804 1 : fb_mode_option = options;
1805 1 : global = 1;
1806 : }
1807 :
1808 2 : if (!global) {
1809 5 : for (i = 0; i < FB_MAX; i++) {
1810 4 : if (video_options[i] == NULL) {
1811 2 : video_options[i] = options;
1812 1 : break;
1813 : }
1814 :
1815 1 : }
1816 : }
1817 :
1818 2 : return 1;
1819 : }
1820 : __setup("video=", video_setup);
1821 1 : #endif
1822 :
1823 : /*
1824 : * Visible symbols for modules
1825 : */
1826 :
1827 : EXPORT_SYMBOL(register_framebuffer);
1828 : EXPORT_SYMBOL(unregister_framebuffer);
1829 : EXPORT_SYMBOL(num_registered_fb);
1830 : EXPORT_SYMBOL(registered_fb);
1831 : EXPORT_SYMBOL(fb_show_logo);
1832 : EXPORT_SYMBOL(fb_set_var);
1833 : EXPORT_SYMBOL(fb_blank);
1834 : EXPORT_SYMBOL(fb_pan_display);
1835 : EXPORT_SYMBOL(fb_get_buffer_offset);
1836 : EXPORT_SYMBOL(fb_set_suspend);
1837 : EXPORT_SYMBOL(fb_get_options);
1838 :
1839 : MODULE_LICENSE("GPL");
|