fbmem.c 45.3 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
/*
 *  linux/drivers/video/fbmem.c
 *
 *  Copyright (C) 1994 Martin Schaller
 *
 *	2001 - Documented with DocBook
 *	- Brad Douglas <brad@neruo.com>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

#include <linux/module.h>

16
#include <linux/compat.h>
Linus Torvalds's avatar
Linus Torvalds committed
17 18 19 20 21 22 23
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/mman.h>
24
#include <linux/vt.h>
Linus Torvalds's avatar
Linus Torvalds committed
25 26 27
#include <linux/init.h>
#include <linux/linux_logo.h>
#include <linux/proc_fs.h>
28
#include <linux/seq_file.h>
Linus Torvalds's avatar
Linus Torvalds committed
29 30 31 32 33
#include <linux/console.h>
#include <linux/kmod.h>
#include <linux/err.h>
#include <linux/device.h>
#include <linux/efi.h>
34
#include <linux/fb.h>
Linus Torvalds's avatar
Linus Torvalds committed
35

36
#include <asm/fb.h>
Linus Torvalds's avatar
Linus Torvalds committed
37 38 39 40 41 42 43 44


    /*
     *  Frame buffer device initialization and setup routines
     */

#define FBPIXMAPSIZE	(1024 * 8)

45
static DEFINE_MUTEX(registration_lock);
46 47
struct fb_info *registered_fb[FB_MAX] __read_mostly;
int num_registered_fb __read_mostly;
Linus Torvalds's avatar
Linus Torvalds committed
48

49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
static struct fb_info *get_fb_info(unsigned int idx)
{
	struct fb_info *fb_info;

	if (idx >= FB_MAX)
		return ERR_PTR(-ENODEV);

	mutex_lock(&registration_lock);
	fb_info = registered_fb[idx];
	if (fb_info)
		atomic_inc(&fb_info->count);
	mutex_unlock(&registration_lock);

	return fb_info;
}

static void put_fb_info(struct fb_info *fb_info)
{
	if (!atomic_dec_and_test(&fb_info->count))
		return;
	if (fb_info->fbops->fb_destroy)
		fb_info->fbops->fb_destroy(fb_info);
}

Andrew Morton's avatar
Andrew Morton committed
73 74 75 76 77 78 79 80 81 82 83
int lock_fb_info(struct fb_info *info)
{
	mutex_lock(&info->lock);
	if (!info->fbops) {
		mutex_unlock(&info->lock);
		return 0;
	}
	return 1;
}
EXPORT_SYMBOL(lock_fb_info);

Linus Torvalds's avatar
Linus Torvalds committed
84 85 86 87
/*
 * Helpers
 */

88 89
int fb_get_color_depth(struct fb_var_screeninfo *var,
		       struct fb_fix_screeninfo *fix)
Linus Torvalds's avatar
Linus Torvalds committed
90
{
91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107
	int depth = 0;

	if (fix->visual == FB_VISUAL_MONO01 ||
	    fix->visual == FB_VISUAL_MONO10)
		depth = 1;
	else {
		if (var->green.length == var->blue.length &&
		    var->green.length == var->red.length &&
		    var->green.offset == var->blue.offset &&
		    var->green.offset == var->red.offset)
			depth = var->green.length;
		else
			depth = var->green.length + var->red.length +
				var->blue.length;
	}

	return depth;
Linus Torvalds's avatar
Linus Torvalds committed
108 109 110 111
}
EXPORT_SYMBOL(fb_get_color_depth);

/*
James Simmons's avatar
James Simmons committed
112
 * Data padding functions.
Linus Torvalds's avatar
Linus Torvalds committed
113
 */
James Simmons's avatar
James Simmons committed
114
void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
Linus Torvalds's avatar
Linus Torvalds committed
115
{
116
	__fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
Linus Torvalds's avatar
Linus Torvalds committed
117
}
James Simmons's avatar
James Simmons committed
118
EXPORT_SYMBOL(fb_pad_aligned_buffer);
Linus Torvalds's avatar
Linus Torvalds committed
119

James Simmons's avatar
James Simmons committed
120 121
void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
				u32 shift_high, u32 shift_low, u32 mod)
Linus Torvalds's avatar
Linus Torvalds committed
122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147
{
	u8 mask = (u8) (0xfff << shift_high), tmp;
	int i, j;

	for (i = height; i--; ) {
		for (j = 0; j < idx; j++) {
			tmp = dst[j];
			tmp &= mask;
			tmp |= *src >> shift_low;
			dst[j] = tmp;
			tmp = *src << shift_high;
			dst[j+1] = tmp;
			src++;
		}
		tmp = dst[idx];
		tmp &= mask;
		tmp |= *src >> shift_low;
		dst[idx] = tmp;
		if (shift_high < mod) {
			tmp = *src << shift_high;
			dst[idx+1] = tmp;
		}
		src++;
		dst += d_pitch;
	}
}
James Simmons's avatar
James Simmons committed
148
EXPORT_SYMBOL(fb_pad_unaligned_buffer);
Linus Torvalds's avatar
Linus Torvalds committed
149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230

/*
 * we need to lock this section since fb_cursor
 * may use fb_imageblit()
 */
char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
{
	u32 align = buf->buf_align - 1, offset;
	char *addr = buf->addr;

	/* If IO mapped, we need to sync before access, no sharing of
	 * the pixmap is done
	 */
	if (buf->flags & FB_PIXMAP_IO) {
		if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
			info->fbops->fb_sync(info);
		return addr;
	}

	/* See if we fit in the remaining pixmap space */
	offset = buf->offset + align;
	offset &= ~align;
	if (offset + size > buf->size) {
		/* We do not fit. In order to be able to re-use the buffer,
		 * we must ensure no asynchronous DMA'ing or whatever operation
		 * is in progress, we sync for that.
		 */
		if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
			info->fbops->fb_sync(info);
		offset = 0;
	}
	buf->offset = offset + size;
	addr += offset;

	return addr;
}

#ifdef CONFIG_LOGO

static inline unsigned safe_shift(unsigned d, int n)
{
	return n < 0 ? d >> -n : d << n;
}

static void fb_set_logocmap(struct fb_info *info,
				   const struct linux_logo *logo)
{
	struct fb_cmap palette_cmap;
	u16 palette_green[16];
	u16 palette_blue[16];
	u16 palette_red[16];
	int i, j, n;
	const unsigned char *clut = logo->clut;

	palette_cmap.start = 0;
	palette_cmap.len = 16;
	palette_cmap.red = palette_red;
	palette_cmap.green = palette_green;
	palette_cmap.blue = palette_blue;
	palette_cmap.transp = NULL;

	for (i = 0; i < logo->clutsize; i += n) {
		n = logo->clutsize - i;
		/* palette_cmap provides space for only 16 colors at once */
		if (n > 16)
			n = 16;
		palette_cmap.start = 32 + i;
		palette_cmap.len = n;
		for (j = 0; j < n; ++j) {
			palette_cmap.red[j] = clut[0] << 8 | clut[0];
			palette_cmap.green[j] = clut[1] << 8 | clut[1];
			palette_cmap.blue[j] = clut[2] << 8 | clut[2];
			clut += 3;
		}
		fb_set_cmap(&palette_cmap, info);
	}
}

static void  fb_set_logo_truepalette(struct fb_info *info,
					    const struct linux_logo *logo,
					    u32 *palette)
{
231
	static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
Linus Torvalds's avatar
Linus Torvalds committed
232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267
	unsigned char redmask, greenmask, bluemask;
	int redshift, greenshift, blueshift;
	int i;
	const unsigned char *clut = logo->clut;

	/*
	 * We have to create a temporary palette since console palette is only
	 * 16 colors long.
	 */
	/* Bug: Doesn't obey msb_right ... (who needs that?) */
	redmask   = mask[info->var.red.length   < 8 ? info->var.red.length   : 8];
	greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
	bluemask  = mask[info->var.blue.length  < 8 ? info->var.blue.length  : 8];
	redshift   = info->var.red.offset   - (8 - info->var.red.length);
	greenshift = info->var.green.offset - (8 - info->var.green.length);
	blueshift  = info->var.blue.offset  - (8 - info->var.blue.length);

	for ( i = 0; i < logo->clutsize; i++) {
		palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
				 safe_shift((clut[1] & greenmask), greenshift) |
				 safe_shift((clut[2] & bluemask), blueshift));
		clut += 3;
	}
}

static void fb_set_logo_directpalette(struct fb_info *info,
					     const struct linux_logo *logo,
					     u32 *palette)
{
	int redshift, greenshift, blueshift;
	int i;

	redshift = info->var.red.offset;
	greenshift = info->var.green.offset;
	blueshift = info->var.blue.offset;

268
	for (i = 32; i < 32 + logo->clutsize; i++)
Linus Torvalds's avatar
Linus Torvalds committed
269 270 271 272 273 274 275
		palette[i] = i << redshift | i << greenshift | i << blueshift;
}

static void fb_set_logo(struct fb_info *info,
			       const struct linux_logo *logo, u8 *dst,
			       int depth)
{
276
	int i, j, k;
Linus Torvalds's avatar
Linus Torvalds committed
277
	const u8 *src = logo->data;
278 279
	u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
	u8 fg = 1, d;
Linus Torvalds's avatar
Linus Torvalds committed
280

281 282 283 284 285 286 287 288
	switch (fb_get_color_depth(&info->var, &info->fix)) {
	case 1:
		fg = 1;
		break;
	case 2:
		fg = 3;
		break;
	default:
Linus Torvalds's avatar
Linus Torvalds committed
289
		fg = 7;
290 291
		break;
	}
Linus Torvalds's avatar
Linus Torvalds committed
292

293 294 295 296
	if (info->fix.visual == FB_VISUAL_MONO01 ||
	    info->fix.visual == FB_VISUAL_MONO10)
		fg = ~((u8) (0xfff << info->var.green.length));

Linus Torvalds's avatar
Linus Torvalds committed
297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354
	switch (depth) {
	case 4:
		for (i = 0; i < logo->height; i++)
			for (j = 0; j < logo->width; src++) {
				*dst++ = *src >> 4;
				j++;
				if (j < logo->width) {
					*dst++ = *src & 0x0f;
					j++;
				}
			}
		break;
	case 1:
		for (i = 0; i < logo->height; i++) {
			for (j = 0; j < logo->width; src++) {
				d = *src ^ xor;
				for (k = 7; k >= 0; k--) {
					*dst++ = ((d >> k) & 1) ? fg : 0;
					j++;
				}
			}
		}
		break;
	}
}

/*
 * Three (3) kinds of logo maps exist.  linux_logo_clut224 (>16 colors),
 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors).  Depending on
 * the visual format and color depth of the framebuffer, the DAC, the
 * pseudo_palette, and the logo data will be adjusted accordingly.
 *
 * Case 1 - linux_logo_clut224:
 * Color exceeds the number of console colors (16), thus we set the hardware DAC
 * using fb_set_cmap() appropriately.  The "needs_cmapreset"  flag will be set.
 *
 * For visuals that require color info from the pseudo_palette, we also construct
 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
 * will be set.
 *
 * Case 2 - linux_logo_vga16:
 * The number of colors just matches the console colors, thus there is no need
 * to set the DAC or the pseudo_palette.  However, the bitmap is packed, ie,
 * each byte contains color information for two pixels (upper and lower nibble).
 * To be consistent with fb_imageblit() usage, we therefore separate the two
 * nibbles into separate bytes. The "depth" flag will be set to 4.
 *
 * Case 3 - linux_logo_mono:
 * This is similar with Case 2.  Each byte contains information for 8 pixels.
 * We isolate each bit and expand each into a byte. The "depth" flag will
 * be set to 1.
 */
static struct logo_data {
	int depth;
	int needs_directpalette;
	int needs_truepalette;
	int needs_cmapreset;
	const struct linux_logo *logo;
355
} fb_logo __read_mostly;
Linus Torvalds's avatar
Linus Torvalds committed
356

357 358 359 360 361 362 363 364 365 366 367 368
static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
{
	u32 size = width * height, i;

	out += size - 1;

	for (i = size; i--; )
		*out-- = *in++;
}

static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
{
369
	int i, j, h = height - 1;
370 371 372

	for (i = 0; i < height; i++)
		for (j = 0; j < width; j++)
373
				out[height * j + h - i] = *in++;
374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392
}

static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
{
	int i, j, w = width - 1;

	for (i = 0; i < height; i++)
		for (j = 0; j < width; j++)
			out[height * (w - j) + i] = *in++;
}

static void fb_rotate_logo(struct fb_info *info, u8 *dst,
			   struct fb_image *image, int rotate)
{
	u32 tmp;

	if (rotate == FB_ROTATE_UD) {
		fb_rotate_logo_ud(image->data, dst, image->width,
				  image->height);
393 394
		image->dx = info->var.xres - image->width - image->dx;
		image->dy = info->var.yres - image->height - image->dy;
395 396 397 398 399 400
	} else if (rotate == FB_ROTATE_CW) {
		fb_rotate_logo_cw(image->data, dst, image->width,
				  image->height);
		tmp = image->width;
		image->width = image->height;
		image->height = tmp;
401 402 403
		tmp = image->dy;
		image->dy = image->dx;
		image->dx = info->var.xres - image->width - tmp;
404
	} else if (rotate == FB_ROTATE_CCW) {
405 406
		fb_rotate_logo_ccw(image->data, dst, image->width,
				   image->height);
407 408 409
		tmp = image->width;
		image->width = image->height;
		image->height = tmp;
410 411 412
		tmp = image->dx;
		image->dx = image->dy;
		image->dy = info->var.yres - image->height - tmp;
413 414 415 416 417 418
	}

	image->data = dst;
}

static 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 (rotate == FB_ROTATE_UR) {
424 425 426
		for (x = 0;
		     x < num && image->dx + image->width <= info->var.xres;
		     x++) {
427
			info->fbops->fb_imageblit(info, image);
428
			image->dx += image->width + 8;
429 430
		}
	} else if (rotate == FB_ROTATE_UD) {
431
		for (x = 0; x < num && image->dx >= 0; x++) {
432
			info->fbops->fb_imageblit(info, image);
433
			image->dx -= image->width + 8;
434 435
		}
	} else if (rotate == FB_ROTATE_CW) {
436 437 438
		for (x = 0;
		     x < num && image->dy + image->height <= info->var.yres;
		     x++) {
439
			info->fbops->fb_imageblit(info, image);
440
			image->dy += image->height + 8;
441 442
		}
	} else if (rotate == FB_ROTATE_CCW) {
443
		for (x = 0; x < num && image->dy >= 0; x++) {
444
			info->fbops->fb_imageblit(info, image);
445
			image->dy -= image->height + 8;
446 447 448 449
		}
	}
}

450 451 452
static int fb_show_logo_line(struct fb_info *info, int rotate,
			     const struct linux_logo *logo, int y,
			     unsigned int n)
Linus Torvalds's avatar
Linus Torvalds committed
453 454
{
	u32 *palette = NULL, *saved_pseudo_palette = NULL;
455
	unsigned char *logo_new = NULL, *logo_rotate = NULL;
Linus Torvalds's avatar
Linus Torvalds committed
456 457 458
	struct fb_image image;

	/* Return if the frame buffer is not mapped or suspended */
459
	if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
460
	    info->flags & FBINFO_MODULE)
Linus Torvalds's avatar
Linus Torvalds committed
461 462 463
		return 0;

	image.depth = 8;
464
	image.data = logo->data;
Linus Torvalds's avatar
Linus Torvalds committed
465 466

	if (fb_logo.needs_cmapreset)
467
		fb_set_logocmap(info, logo);
Linus Torvalds's avatar
Linus Torvalds committed
468

469
	if (fb_logo.needs_truepalette ||
Linus Torvalds's avatar
Linus Torvalds committed
470 471 472 473 474 475
	    fb_logo.needs_directpalette) {
		palette = kmalloc(256 * 4, GFP_KERNEL);
		if (palette == NULL)
			return 0;

		if (fb_logo.needs_truepalette)
476
			fb_set_logo_truepalette(info, logo, palette);
Linus Torvalds's avatar
Linus Torvalds committed
477
		else
478
			fb_set_logo_directpalette(info, logo, palette);
Linus Torvalds's avatar
Linus Torvalds committed
479 480 481 482 483 484

		saved_pseudo_palette = info->pseudo_palette;
		info->pseudo_palette = palette;
	}

	if (fb_logo.depth <= 4) {
485
		logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL);
Linus Torvalds's avatar
Linus Torvalds committed
486 487 488 489 490 491 492
		if (logo_new == NULL) {
			kfree(palette);
			if (saved_pseudo_palette)
				info->pseudo_palette = saved_pseudo_palette;
			return 0;
		}
		image.data = logo_new;
493
		fb_set_logo(info, logo, logo_new, fb_logo.depth);
Linus Torvalds's avatar
Linus Torvalds committed
494 495
	}

496
	image.dx = 0;
497 498 499
	image.dy = y;
	image.width = logo->width;
	image.height = logo->height;
Linus Torvalds's avatar
Linus Torvalds committed
500

501
	if (rotate) {
502 503
		logo_rotate = kmalloc(logo->width *
				      logo->height, GFP_KERNEL);
504 505
		if (logo_rotate)
			fb_rotate_logo(info, logo_rotate, &image, rotate);
Linus Torvalds's avatar
Linus Torvalds committed
506
	}
507

508
	fb_do_show_logo(info, &image, rotate, n);
509

Linus Torvalds's avatar
Linus Torvalds committed
510 511 512 513
	kfree(palette);
	if (saved_pseudo_palette != NULL)
		info->pseudo_palette = saved_pseudo_palette;
	kfree(logo_new);
514
	kfree(logo_rotate);
515 516 517
	return logo->height;
}

518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547

#ifdef CONFIG_FB_LOGO_EXTRA

#define FB_LOGO_EX_NUM_MAX 10
static struct logo_data_extra {
	const struct linux_logo *logo;
	unsigned int n;
} fb_logo_ex[FB_LOGO_EX_NUM_MAX];
static unsigned int fb_logo_ex_num;

void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
{
	if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
		return;

	fb_logo_ex[fb_logo_ex_num].logo = logo;
	fb_logo_ex[fb_logo_ex_num].n = n;
	fb_logo_ex_num++;
}

static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
				  unsigned int yres)
{
	unsigned int i;

	/* FIXME: logo_ex supports only truecolor fb. */
	if (info->fix.visual != FB_VISUAL_TRUECOLOR)
		fb_logo_ex_num = 0;

	for (i = 0; i < fb_logo_ex_num; i++) {
548 549 550 551
		if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
			fb_logo_ex[i].logo = NULL;
			continue;
		}
552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638
		height += fb_logo_ex[i].logo->height;
		if (height > yres) {
			height -= fb_logo_ex[i].logo->height;
			fb_logo_ex_num = i;
			break;
		}
	}
	return height;
}

static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
{
	unsigned int i;

	for (i = 0; i < fb_logo_ex_num; i++)
		y += fb_show_logo_line(info, rotate,
				       fb_logo_ex[i].logo, y, fb_logo_ex[i].n);

	return y;
}

#else /* !CONFIG_FB_LOGO_EXTRA */

static inline int fb_prepare_extra_logos(struct fb_info *info,
					 unsigned int height,
					 unsigned int yres)
{
	return height;
}

static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
{
	return y;
}

#endif /* CONFIG_FB_LOGO_EXTRA */


int fb_prepare_logo(struct fb_info *info, int rotate)
{
	int depth = fb_get_color_depth(&info->var, &info->fix);
	unsigned int yres;

	memset(&fb_logo, 0, sizeof(struct logo_data));

	if (info->flags & FBINFO_MISC_TILEBLITTING ||
	    info->flags & FBINFO_MODULE)
		return 0;

	if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
		depth = info->var.blue.length;
		if (info->var.red.length < depth)
			depth = info->var.red.length;
		if (info->var.green.length < depth)
			depth = info->var.green.length;
	}

	if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
		/* assume console colormap */
		depth = 4;
	}

	/* Return if no suitable logo was found */
	fb_logo.logo = fb_find_logo(depth);

	if (!fb_logo.logo) {
		return 0;
	}

	if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
		yres = info->var.yres;
	else
		yres = info->var.xres;

	if (fb_logo.logo->height > yres) {
		fb_logo.logo = NULL;
		return 0;
	}

	/* What depth we asked for might be different from what we get */
	if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
		fb_logo.depth = 8;
	else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
		fb_logo.depth = 4;
	else
		fb_logo.depth = 1;

639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654

 	if (fb_logo.depth > 4 && depth > 4) {
 		switch (info->fix.visual) {
 		case FB_VISUAL_TRUECOLOR:
 			fb_logo.needs_truepalette = 1;
 			break;
 		case FB_VISUAL_DIRECTCOLOR:
 			fb_logo.needs_directpalette = 1;
 			fb_logo.needs_cmapreset = 1;
 			break;
 		case FB_VISUAL_PSEUDOCOLOR:
 			fb_logo.needs_cmapreset = 1;
 			break;
 		}
 	}

655 656 657
	return fb_prepare_extra_logos(info, fb_logo.logo->height, yres);
}

658 659
int fb_show_logo(struct fb_info *info, int rotate)
{
660 661 662 663 664 665 666
	int y;

	y = fb_show_logo_line(info, rotate, fb_logo.logo, 0,
			      num_online_cpus());
	y = fb_show_extra_logos(info, y, rotate);

	return y;
Linus Torvalds's avatar
Linus Torvalds committed
667 668
}
#else
669 670
int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
Linus Torvalds's avatar
Linus Torvalds committed
671 672
#endif /* CONFIG_LOGO */

673 674
static void *fb_seq_start(struct seq_file *m, loff_t *pos)
{
675
	mutex_lock(&registration_lock);
676 677 678 679 680 681 682 683 684 685
	return (*pos < FB_MAX) ? pos : NULL;
}

static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
{
	(*pos)++;
	return (*pos < FB_MAX) ? pos : NULL;
}

static void fb_seq_stop(struct seq_file *m, void *v)
Linus Torvalds's avatar
Linus Torvalds committed
686
{
687
	mutex_unlock(&registration_lock);
Linus Torvalds's avatar
Linus Torvalds committed
688 689
}

690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719
static int fb_seq_show(struct seq_file *m, void *v)
{
	int i = *(loff_t *)v;
	struct fb_info *fi = registered_fb[i];

	if (fi)
		seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
	return 0;
}

static const struct seq_operations proc_fb_seq_ops = {
	.start	= fb_seq_start,
	.next	= fb_seq_next,
	.stop	= fb_seq_stop,
	.show	= fb_seq_show,
};

static int proc_fb_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &proc_fb_seq_ops);
}

static const struct file_operations fb_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= proc_fb_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release,
};

720 721 722 723 724 725 726 727 728
/*
 * We hold a reference to the fb_info in file->private_data,
 * but if the current registered fb has changed, we don't
 * actually want to use it.
 *
 * So look up the fb_info using the inode minor number,
 * and just verify it against the reference we have.
 */
static struct fb_info *file_fb_info(struct file *file)
Linus Torvalds's avatar
Linus Torvalds committed
729
{
Al Viro's avatar
Al Viro committed
730
	struct inode *inode = file_inode(file);
Linus Torvalds's avatar
Linus Torvalds committed
731 732
	int fbidx = iminor(inode);
	struct fb_info *info = registered_fb[fbidx];
733 734 735 736 737 738 739 740 741 742 743

	if (info != file->private_data)
		info = NULL;
	return info;
}

static ssize_t
fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
	unsigned long p = *ppos;
	struct fb_info *info = file_fb_info(file);
744 745 746
	u8 *buffer, *dst;
	u8 __iomem *src;
	int c, cnt = 0, err = 0;
Linus Torvalds's avatar
Linus Torvalds committed
747 748 749 750 751 752 753 754 755
	unsigned long total_size;

	if (!info || ! info->screen_base)
		return -ENODEV;

	if (info->state != FBINFO_STATE_RUNNING)
		return -EPERM;

	if (info->fbops->fb_read)
756
		return info->fbops->fb_read(info, buf, count, ppos);
Linus Torvalds's avatar
Linus Torvalds committed
757 758
	
	total_size = info->screen_size;
759

Linus Torvalds's avatar
Linus Torvalds committed
760 761 762 763
	if (total_size == 0)
		total_size = info->fix.smem_len;

	if (p >= total_size)
764 765
		return 0;

Linus Torvalds's avatar
Linus Torvalds committed
766
	if (count >= total_size)
767 768
		count = total_size;

Linus Torvalds's avatar
Linus Torvalds committed
769 770 771 772 773 774 775 776
	if (count + p > total_size)
		count = total_size - p;

	buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
			 GFP_KERNEL);
	if (!buffer)
		return -ENOMEM;

777
	src = (u8 __iomem *) (info->screen_base + p);
Linus Torvalds's avatar
Linus Torvalds committed
778 779 780 781 782 783 784

	if (info->fbops->fb_sync)
		info->fbops->fb_sync(info);

	while (count) {
		c  = (count > PAGE_SIZE) ? PAGE_SIZE : count;
		dst = buffer;
785 786 787
		fb_memcpy_fromfb(dst, src, c);
		dst += c;
		src += c;
Linus Torvalds's avatar
Linus Torvalds committed
788 789 790 791 792 793 794 795 796 797 798 799

		if (copy_to_user(buf, buffer, c)) {
			err = -EFAULT;
			break;
		}
		*ppos += c;
		buf += c;
		cnt += c;
		count -= c;
	}

	kfree(buffer);
800

Linus Torvalds's avatar
Linus Torvalds committed
801 802 803 804 805 806 807
	return (err) ? err : cnt;
}

static ssize_t
fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
{
	unsigned long p = *ppos;
808
	struct fb_info *info = file_fb_info(file);
809 810 811
	u8 *buffer, *src;
	u8 __iomem *dst;
	int c, cnt = 0, err = 0;
Linus Torvalds's avatar
Linus Torvalds committed
812 813 814 815 816 817 818 819 820
	unsigned long total_size;

	if (!info || !info->screen_base)
		return -ENODEV;

	if (info->state != FBINFO_STATE_RUNNING)
		return -EPERM;

	if (info->fbops->fb_write)
821
		return info->fbops->fb_write(info, buf, count, ppos);
Linus Torvalds's avatar
Linus Torvalds committed
822 823
	
	total_size = info->screen_size;
824

Linus Torvalds's avatar
Linus Torvalds committed
825 826 827 828
	if (total_size == 0)
		total_size = info->fix.smem_len;

	if (p > total_size)
829
		return -EFBIG;
830

831 832
	if (count > total_size) {
		err = -EFBIG;
833
		count = total_size;
834 835 836 837 838
	}

	if (count + p > total_size) {
		if (!err)
			err = -ENOSPC;
839 840

		count = total_size - p;
841
	}
842

Linus Torvalds's avatar
Linus Torvalds committed
843 844 845 846 847
	buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
			 GFP_KERNEL);
	if (!buffer)
		return -ENOMEM;

848
	dst = (u8 __iomem *) (info->screen_base + p);
Linus Torvalds's avatar
Linus Torvalds committed
849 850 851 852 853 854 855

	if (info->fbops->fb_sync)
		info->fbops->fb_sync(info);

	while (count) {
		c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
		src = buffer;
856

Linus Torvalds's avatar
Linus Torvalds committed
857 858 859 860
		if (copy_from_user(src, buf, c)) {
			err = -EFAULT;
			break;
		}
861

862 863 864
		fb_memcpy_tofb(dst, src, c);
		dst += c;
		src += c;
Linus Torvalds's avatar
Linus Torvalds committed
865 866 867 868 869
		*ppos += c;
		buf += c;
		cnt += c;
		count -= c;
	}
870

Linus Torvalds's avatar
Linus Torvalds committed
871 872
	kfree(buffer);

873
	return (cnt) ? cnt : err;
Linus Torvalds's avatar
Linus Torvalds committed
874 875 876 877 878
}

int
fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
{
879
	struct fb_fix_screeninfo *fix = &info->fix;
880 881
	unsigned int yres = info->var.yres;
	int err = 0;
882 883 884 885 886 887 888 889 890 891 892 893 894 895 896

	if (var->yoffset > 0) {
		if (var->vmode & FB_VMODE_YWRAP) {
			if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
				err = -EINVAL;
			else
				yres = 0;
		} else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
			err = -EINVAL;
	}

	if (var->xoffset > 0 && (!fix->xpanstep ||
				 (var->xoffset % fix->xpanstep)))
		err = -EINVAL;

897
	if (err || !info->fbops->fb_pan_display ||
898 899
	    var->yoffset > info->var.yres_virtual - yres ||
	    var->xoffset > info->var.xres_virtual - info->var.xres)
900
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
901 902 903

	if ((err = info->fbops->fb_pan_display(var, info)))
		return err;
James Hogan's avatar
James Hogan committed
904 905 906 907 908 909 910
	info->var.xoffset = var->xoffset;
	info->var.yoffset = var->yoffset;
	if (var->vmode & FB_VMODE_YWRAP)
		info->var.vmode |= FB_VMODE_YWRAP;
	else
		info->var.vmode &= ~FB_VMODE_YWRAP;
	return 0;
Linus Torvalds's avatar
Linus Torvalds committed
911 912
}

913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935
static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
			 u32 activate)
{
	struct fb_event event;
	struct fb_blit_caps caps, fbcaps;
	int err = 0;

	memset(&caps, 0, sizeof(caps));
	memset(&fbcaps, 0, sizeof(fbcaps));
	caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
	event.info = info;
	event.data = &caps;
	fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
	info->fbops->fb_get_caps(info, &fbcaps, var);

	if (((fbcaps.x ^ caps.x) & caps.x) ||
	    ((fbcaps.y ^ caps.y) & caps.y) ||
	    (fbcaps.len < caps.len))
		err = -EINVAL;

	return err;
}

Linus Torvalds's avatar
Linus Torvalds committed
936 937 938
int
fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
{
939 940
	int flags = info->flags;
	int ret = 0;
Linus Torvalds's avatar
Linus Torvalds committed
941 942 943 944 945 946 947 948 949 950 951 952 953 954

	if (var->activate & FB_ACTIVATE_INV_MODE) {
		struct fb_videomode mode1, mode2;

		fb_var_to_videomode(&mode1, var);
		fb_var_to_videomode(&mode2, &info->var);
		/* make sure we don't delete the videomode of current var */
		ret = fb_mode_is_equal(&mode1, &mode2);

		if (!ret) {
		    struct fb_event event;

		    event.info = info;
		    event.data = &mode1;
955
		    ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
Linus Torvalds's avatar
Linus Torvalds committed
956 957 958 959 960
		}

		if (!ret)
		    fb_delete_videomode(&mode1, &info->modelist);

961 962 963

		ret = (ret) ? -EINVAL : 0;
		goto done;
Linus Torvalds's avatar
Linus Torvalds committed
964 965 966 967
	}

	if ((var->activate & FB_ACTIVATE_FORCE) ||
	    memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
968 969
		u32 activate = var->activate;

970 971 972 973 974 975 976 977 978 979 980 981 982 983
		/* When using FOURCC mode, make sure the red, green, blue and
		 * transp fields are set to 0.
		 */
		if ((info->fix.capabilities & FB_CAP_FOURCC) &&
		    var->grayscale > 1) {
			if (var->red.offset     || var->green.offset    ||
			    var->blue.offset    || var->transp.offset   ||
			    var->red.length     || var->green.length    ||
			    var->blue.length    || var->transp.length   ||
			    var->red.msb_right  || var->green.msb_right ||
			    var->blue.msb_right || var->transp.msb_right)
				return -EINVAL;
		}

Linus Torvalds's avatar
Linus Torvalds committed
984 985
		if (!info->fbops->fb_check_var) {
			*var = info->var;
986
			goto done;
Linus Torvalds's avatar
Linus Torvalds committed
987 988
		}

989 990 991 992
		ret = info->fbops->fb_check_var(var, info);

		if (ret)
			goto done;
Linus Torvalds's avatar
Linus Torvalds committed
993 994

		if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
995
			struct fb_var_screeninfo old_var;
Linus Torvalds's avatar
Linus Torvalds committed
996 997
			struct fb_videomode mode;

998
			if (info->fbops->fb_get_caps) {
999
				ret = fb_check_caps(info, var, activate);
1000

1001
				if (ret)
1002 1003 1004
					goto done;
			}

1005
			old_var = info->var;
Linus Torvalds's avatar
Linus Torvalds committed
1006
			info->var = *var;
1007

1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018
			if (info->fbops->fb_set_par) {
				ret = info->fbops->fb_set_par(info);

				if (ret) {
					info->var = old_var;
					printk(KERN_WARNING "detected "
						"fb_set_par error, "
						"error code: %d\n", ret);
					goto done;
				}
			}
Linus Torvalds's avatar
Linus Torvalds committed
1019 1020 1021 1022 1023 1024 1025

			fb_pan_display(info, &info->var);
			fb_set_cmap(&info->cmap, info);
			fb_var_to_videomode(&mode, &info->var);

			if (info->modelist.prev && info->modelist.next &&
			    !list_empty(&info->modelist))
1026
				ret = fb_add_videomode(&mode, &info->modelist);
Linus Torvalds's avatar
Linus Torvalds committed
1027

1028
			if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
Linus Torvalds's avatar
Linus Torvalds committed
1029
				struct fb_event event;
1030
				int evnt = (activate & FB_ACTIVATE_ALL) ?
1031 1032
					FB_EVENT_MODE_CHANGE_ALL :
					FB_EVENT_MODE_CHANGE;
Linus Torvalds's avatar
Linus Torvalds committed
1033 1034 1035

				info->flags &= ~FBINFO_MISC_USEREVENT;
				event.info = info;
1036
				event.data = &mode;
1037
				fb_notifier_call_chain(evnt, &event);
Linus Torvalds's avatar
Linus Torvalds committed
1038 1039 1040
			}
		}
	}
1041 1042

 done:
1043
	return ret;
Linus Torvalds's avatar
Linus Torvalds committed
1044 1045 1046 1047 1048
}

int
fb_blank(struct fb_info *info, int blank)
{	
1049 1050
	struct fb_event event;
	int ret = -EINVAL, early_ret;
Linus Torvalds's avatar
Linus Torvalds committed
1051 1052 1053 1054

 	if (blank > FB_BLANK_POWERDOWN)
 		blank = FB_BLANK_POWERDOWN;

1055 1056 1057 1058 1059
	event.info = info;
	event.data = &blank;

	early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);

Linus Torvalds's avatar
Linus Torvalds committed
1060 1061 1062
	if (info->fbops->fb_blank)
 		ret = info->fbops->fb_blank(blank, info);

1063
	if (!ret)
1064
		fb_notifier_call_chain(FB_EVENT_BLANK, &event);
1065 1066 1067 1068 1069 1070 1071
	else {
		/*
		 * if fb_blank is failed then revert effects of
		 * the early blank event.
		 */
		if (!early_ret)
			fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK, &event);
Linus Torvalds's avatar
Linus Torvalds committed
1072 1073 1074 1075 1076
	}

 	return ret;
}

1077 1078
static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
			unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
1079
{
1080
	struct fb_ops *fb;
Linus Torvalds's avatar
Linus Torvalds committed
1081 1082 1083
	struct fb_var_screeninfo var;
	struct fb_fix_screeninfo fix;
	struct fb_con2fbmap con2fb;
1084
	struct fb_cmap cmap_from;
Linus Torvalds's avatar
Linus Torvalds committed
1085 1086 1087
	struct fb_cmap_user cmap;
	struct fb_event event;
	void __user *argp = (void __user *)arg;
1088 1089
	long ret = 0;

Linus Torvalds's avatar
Linus Torvalds committed
1090 1091
	switch (cmd) {
	case FBIOGET_VSCREENINFO:
1092 1093 1094 1095 1096 1097
		if (!lock_fb_info(info))
			return -ENODEV;
		var = info->var;
		unlock_fb_info(info);

		ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0;
1098
		break;
Linus Torvalds's avatar
Linus Torvalds committed
1099
	case FBIOPUT_VSCREENINFO:
1100 1101 1102 1103
		if (copy_from_user(&var, argp, sizeof(var)))
			return -EFAULT;
		if (!lock_fb_info(info))
			return -ENODEV;
1104
		console_lock();
Linus Torvalds's avatar
Linus Torvalds committed
1105
		info->flags |= FBINFO_MISC_USEREVENT;
1106
		ret = fb_set_var(info, &var);
Linus Torvalds's avatar
Linus Torvalds committed
1107
		info->flags &= ~FBINFO_MISC_USEREVENT;
1108
		console_unlock();
1109 1110
		unlock_fb_info(info);
		if (!ret && copy_to_user(argp, &var, sizeof(var)))
1111 1112
			ret = -EFAULT;
		break;
Linus Torvalds's avatar
Linus Torvalds committed
1113
	case FBIOGET_FSCREENINFO:
1114 1115 1116 1117 1118 1119
		if (!lock_fb_info(info))
			return -ENODEV;
		fix = info->fix;
		unlock_fb_info(info);

		ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0;
1120
		break;
Linus Torvalds's avatar
Linus Torvalds committed
1121 1122
	case FBIOPUTCMAP:
		if (copy_from_user(&cmap, argp, sizeof(cmap)))
1123 1124
			return -EFAULT;
		ret = fb_set_user_cmap(&cmap, info);
1125
		break;
Linus Torvalds's avatar
Linus Torvalds committed
1126 1127
	case FBIOGETCMAP:
		if (copy_from_user(&cmap, argp, sizeof(cmap)))
1128 1129 1130 1131 1132 1133
			return -EFAULT;
		if (!lock_fb_info(info))
			return -ENODEV;
		cmap_from = info->cmap;
		unlock_fb_info(info);
		ret = fb_cmap_to_user(&cmap_from, &cmap);
1134
		break;
Linus Torvalds's avatar
Linus Torvalds committed
1135
	case FBIOPAN_DISPLAY:
1136 1137 1138 1139
		if (copy_from_user(&var, argp, sizeof(var)))
			return -EFAULT;
		if (!lock_fb_info(info))
			return -ENODEV;
1140
		console_lock();
1141
		ret = fb_pan_display(info, &var);
1142
		console_unlock();
1143
		unlock_fb_info(info);
1144
		if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
1145
			return -EFAULT;
1146
		break;
Linus Torvalds's avatar
Linus Torvalds committed
1147
	case FBIO_CURSOR:
1148 1149
		ret = -EINVAL;
		break;
Linus Torvalds's avatar
Linus Torvalds committed
1150 1151
	case FBIOGET_CON2FBMAP:
		if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1152 1153 1154 1155 1156
			return -EFAULT;
		if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
			return -EINVAL;
		con2fb.framebuffer = -1;
		event.data = &con2fb;
1157 1158
		if (!lock_fb_info(info))
			return -ENODEV;
1159 1160
		event.info = info;
		fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
1161
		unlock_fb_info(info);
1162
		ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
1163
		break;
Linus Torvalds's avatar
Linus Torvalds committed
1164
	case FBIOPUT_CON2FBMAP:
1165 1166 1167 1168 1169 1170
		if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
			return -EFAULT;
		if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
			return -EINVAL;
		if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
			return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
1171
		if (!registered_fb[con2fb.framebuffer])
1172 1173 1174 1175 1176
			request_module("fb%d", con2fb.framebuffer);
		if (!registered_fb[con2fb.framebuffer]) {
			ret = -EINVAL;
			break;
		}
Linus Torvalds's avatar
Linus Torvalds committed
1177
		event.data = &con2fb;
1178 1179
		if (!lock_fb_info(info))
			return -ENODEV;
Dave Airlie's avatar
Dave Airlie committed
1180
		console_lock();
1181
		event.info = info;
1182
		ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
Dave Airlie's avatar
Dave Airlie committed
1183
		console_unlock();
1184
		unlock_fb_info(info);
1185
		break;
Linus Torvalds's avatar
Linus Torvalds committed
1186
	case FBIOBLANK:
1187 1188
		if (!lock_fb_info(info))
			return -ENODEV;
1189
		console_lock();
Linus Torvalds's avatar
Linus Torvalds committed
1190
		info->flags |= FBINFO_MISC_USEREVENT;
1191
		ret = fb_blank(info, arg);
Linus Torvalds's avatar
Linus Torvalds committed
1192
		info->flags &= ~FBINFO_MISC_USEREVENT;
1193
		console_unlock();
1194 1195
		unlock_fb_info(info);
		break;
Linus Torvalds's avatar
Linus Torvalds committed
1196
	default:
1197 1198 1199 1200
		if (!lock_fb_info(info))
			return -ENODEV;
		fb = info->fbops;
		if (fb->fb_ioctl)
1201
			ret = fb->fb_ioctl(info, cmd, arg);
1202 1203 1204
		else
			ret = -ENOTTY;
		unlock_fb_info(info);
Linus Torvalds's avatar
Linus Torvalds committed
1205
	}
1206 1207 1208 1209 1210
	return ret;
}

static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
1211
	struct fb_info *info = file_fb_info(file);
1212

1213 1214
	if (!info)
		return -ENODEV;
1215
	return do_fb_ioctl(info, cmd, arg);
Linus Torvalds's avatar
Linus Torvalds committed
1216 1217 1218
}

#ifdef CONFIG_COMPAT
1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244
struct fb_fix_screeninfo32 {
	char			id[16];
	compat_caddr_t		smem_start;
	u32			smem_len;
	u32			type;
	u32			type_aux;
	u32			visual;
	u16			xpanstep;
	u16			ypanstep;
	u16			ywrapstep;
	u32			line_length;
	compat_caddr_t		mmio_start;
	u32			mmio_len;
	u32			accel;
	u16			reserved[3];
};

struct fb_cmap32 {
	u32			start;
	u32			len;
	compat_caddr_t	red;
	compat_caddr_t	green;
	compat_caddr_t	blue;
	compat_caddr_t	transp;
};

1245 1246
static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
			  unsigned long arg)
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268
{
	struct fb_cmap_user __user *cmap;
	struct fb_cmap32 __user *cmap32;
	__u32 data;
	int err;

	cmap = compat_alloc_user_space(sizeof(*cmap));
	cmap32 = compat_ptr(arg);

	if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
		return -EFAULT;

	if (get_user(data, &cmap32->red) ||
	    put_user(compat_ptr(data), &cmap->red) ||
	    get_user(data, &cmap32->green) ||
	    put_user(compat_ptr(data), &cmap->green) ||
	    get_user(data, &cmap32->blue) ||
	    put_user(compat_ptr(data), &cmap->blue) ||
	    get_user(data, &cmap32->transp) ||
	    put_user(compat_ptr(data), &cmap->transp))
		return -EFAULT;

1269
	err = do_fb_ioctl(info, cmd, (unsigned long) cmap);
1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310

	if (!err) {
		if (copy_in_user(&cmap32->start,
				 &cmap->start,
				 2 * sizeof(__u32)))
			err = -EFAULT;
	}
	return err;
}

static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
				  struct fb_fix_screeninfo32 __user *fix32)
{
	__u32 data;
	int err;

	err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));

	data = (__u32) (unsigned long) fix->smem_start;
	err |= put_user(data, &fix32->smem_start);

	err |= put_user(fix->smem_len, &fix32->smem_len);
	err |= put_user(fix->type, &fix32->type);
	err |= put_user(fix->type_aux, &fix32->type_aux);
	err |= put_user(fix->visual, &fix32->visual);
	err |= put_user(fix->xpanstep, &fix32->xpanstep);
	err |= put_user(fix->ypanstep, &fix32->ypanstep);
	err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
	err |= put_user(fix->line_length, &fix32->line_length);

	data = (__u32) (unsigned long) fix->mmio_start;
	err |= put_user(data, &fix32->mmio_start);

	err |= put_user(fix->mmio_len, &fix32->mmio_len);
	err |= put_user(fix->accel, &fix32->accel);
	err |= copy_to_user(fix32->reserved, fix->reserved,
			    sizeof(fix->reserved));

	return err;
}

1311 1312
static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
			      unsigned long arg)
1313 1314 1315 1316 1317 1318 1319 1320 1321 1322
{
	mm_segment_t old_fs;
	struct fb_fix_screeninfo fix;
	struct fb_fix_screeninfo32 __user *fix32;
	int err;

	fix32 = compat_ptr(arg);

	old_fs = get_fs();
	set_fs(KERNEL_DS);
1323
	err = do_fb_ioctl(info, cmd, (unsigned long) &fix);
1324 1325 1326 1327 1328 1329 1330 1331
	set_fs(old_fs);

	if (!err)
		err = do_fscreeninfo_to_user(&fix, fix32);

	return err;
}

1332 1333
static long fb_compat_ioctl(struct file *file, unsigned int cmd,
			    unsigned long arg)
Linus Torvalds's avatar
Linus Torvalds committed
1334
{
1335 1336
	struct fb_info *info = file_fb_info(file);
	struct fb_ops *fb;
1337
	long ret = -ENOIOCTLCMD;
Linus Torvalds's avatar
Linus Torvalds committed
1338

Linus Torvalds's avatar