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1da177e4 LT |
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 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | ||
c7f82d9c | 16 | #include <linux/compat.h> |
1da177e4 LT |
17 | #include <linux/types.h> |
18 | #include <linux/errno.h> | |
1da177e4 LT |
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> | |
a8f340e3 | 24 | #include <linux/vt.h> |
1da177e4 LT |
25 | #include <linux/init.h> |
26 | #include <linux/linux_logo.h> | |
27 | #include <linux/proc_fs.h> | |
0aa16341 | 28 | #include <linux/seq_file.h> |
1da177e4 | 29 | #include <linux/console.h> |
1da177e4 | 30 | #include <linux/kmod.h> |
1da177e4 | 31 | #include <linux/err.h> |
1da177e4 LT |
32 | #include <linux/device.h> |
33 | #include <linux/efi.h> | |
10eb2659 | 34 | #include <linux/fb.h> |
1da177e4 | 35 | |
10eb2659 | 36 | #include <asm/fb.h> |
1da177e4 | 37 | |
1da177e4 LT |
38 | |
39 | /* | |
40 | * Frame buffer device initialization and setup routines | |
41 | */ | |
42 | ||
43 | #define FBPIXMAPSIZE (1024 * 8) | |
44 | ||
698b3682 | 45 | static DEFINE_MUTEX(registration_lock); |
9c29fba1 | 46 | |
0128beee | 47 | struct fb_info *registered_fb[FB_MAX] __read_mostly; |
9c29fba1 DM |
48 | EXPORT_SYMBOL(registered_fb); |
49 | ||
0128beee | 50 | int num_registered_fb __read_mostly; |
9c29fba1 | 51 | EXPORT_SYMBOL(num_registered_fb); |
1da177e4 | 52 | |
698b3682 LT |
53 | static struct fb_info *get_fb_info(unsigned int idx) |
54 | { | |
55 | struct fb_info *fb_info; | |
56 | ||
57 | if (idx >= FB_MAX) | |
58 | return ERR_PTR(-ENODEV); | |
59 | ||
60 | mutex_lock(®istration_lock); | |
61 | fb_info = registered_fb[idx]; | |
62 | if (fb_info) | |
63 | atomic_inc(&fb_info->count); | |
64 | mutex_unlock(®istration_lock); | |
65 | ||
66 | return fb_info; | |
67 | } | |
68 | ||
69 | static void put_fb_info(struct fb_info *fb_info) | |
70 | { | |
71 | if (!atomic_dec_and_test(&fb_info->count)) | |
72 | return; | |
73 | if (fb_info->fbops->fb_destroy) | |
74 | fb_info->fbops->fb_destroy(fb_info); | |
75 | } | |
76 | ||
6a7f2829 AM |
77 | int lock_fb_info(struct fb_info *info) |
78 | { | |
79 | mutex_lock(&info->lock); | |
80 | if (!info->fbops) { | |
81 | mutex_unlock(&info->lock); | |
82 | return 0; | |
83 | } | |
84 | return 1; | |
85 | } | |
86 | EXPORT_SYMBOL(lock_fb_info); | |
87 | ||
1da177e4 LT |
88 | /* |
89 | * Helpers | |
90 | */ | |
91 | ||
b8c90945 AD |
92 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
93 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 94 | { |
b8c90945 AD |
95 | int depth = 0; |
96 | ||
97 | if (fix->visual == FB_VISUAL_MONO01 || | |
98 | fix->visual == FB_VISUAL_MONO10) | |
99 | depth = 1; | |
100 | else { | |
101 | if (var->green.length == var->blue.length && | |
102 | var->green.length == var->red.length && | |
103 | var->green.offset == var->blue.offset && | |
104 | var->green.offset == var->red.offset) | |
105 | depth = var->green.length; | |
106 | else | |
107 | depth = var->green.length + var->red.length + | |
108 | var->blue.length; | |
109 | } | |
110 | ||
111 | return depth; | |
1da177e4 LT |
112 | } |
113 | EXPORT_SYMBOL(fb_get_color_depth); | |
114 | ||
115 | /* | |
f5a9951c | 116 | * Data padding functions. |
1da177e4 | 117 | */ |
f1ab5dac | 118 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 119 | { |
829e79b6 | 120 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 121 | } |
f1ab5dac | 122 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 123 | |
f1ab5dac JS |
124 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
125 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
126 | { |
127 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
128 | int i, j; | |
129 | ||
130 | for (i = height; i--; ) { | |
131 | for (j = 0; j < idx; j++) { | |
132 | tmp = dst[j]; | |
133 | tmp &= mask; | |
134 | tmp |= *src >> shift_low; | |
135 | dst[j] = tmp; | |
136 | tmp = *src << shift_high; | |
137 | dst[j+1] = tmp; | |
138 | src++; | |
139 | } | |
140 | tmp = dst[idx]; | |
141 | tmp &= mask; | |
142 | tmp |= *src >> shift_low; | |
143 | dst[idx] = tmp; | |
144 | if (shift_high < mod) { | |
145 | tmp = *src << shift_high; | |
146 | dst[idx+1] = tmp; | |
147 | } | |
148 | src++; | |
149 | dst += d_pitch; | |
150 | } | |
151 | } | |
f1ab5dac | 152 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
153 | |
154 | /* | |
155 | * we need to lock this section since fb_cursor | |
156 | * may use fb_imageblit() | |
157 | */ | |
158 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
159 | { | |
160 | u32 align = buf->buf_align - 1, offset; | |
161 | char *addr = buf->addr; | |
162 | ||
163 | /* If IO mapped, we need to sync before access, no sharing of | |
164 | * the pixmap is done | |
165 | */ | |
166 | if (buf->flags & FB_PIXMAP_IO) { | |
167 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
168 | info->fbops->fb_sync(info); | |
169 | return addr; | |
170 | } | |
171 | ||
172 | /* See if we fit in the remaining pixmap space */ | |
173 | offset = buf->offset + align; | |
174 | offset &= ~align; | |
175 | if (offset + size > buf->size) { | |
176 | /* We do not fit. In order to be able to re-use the buffer, | |
177 | * we must ensure no asynchronous DMA'ing or whatever operation | |
178 | * is in progress, we sync for that. | |
179 | */ | |
180 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
181 | info->fbops->fb_sync(info); | |
182 | offset = 0; | |
183 | } | |
184 | buf->offset = offset + size; | |
185 | addr += offset; | |
186 | ||
187 | return addr; | |
188 | } | |
9c29fba1 | 189 | EXPORT_SYMBOL(fb_get_buffer_offset); |
1da177e4 LT |
190 | |
191 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
192 | |
193 | static inline unsigned safe_shift(unsigned d, int n) | |
194 | { | |
195 | return n < 0 ? d >> -n : d << n; | |
196 | } | |
197 | ||
198 | static void fb_set_logocmap(struct fb_info *info, | |
199 | const struct linux_logo *logo) | |
200 | { | |
201 | struct fb_cmap palette_cmap; | |
202 | u16 palette_green[16]; | |
203 | u16 palette_blue[16]; | |
204 | u16 palette_red[16]; | |
205 | int i, j, n; | |
206 | const unsigned char *clut = logo->clut; | |
207 | ||
208 | palette_cmap.start = 0; | |
209 | palette_cmap.len = 16; | |
210 | palette_cmap.red = palette_red; | |
211 | palette_cmap.green = palette_green; | |
212 | palette_cmap.blue = palette_blue; | |
213 | palette_cmap.transp = NULL; | |
214 | ||
215 | for (i = 0; i < logo->clutsize; i += n) { | |
216 | n = logo->clutsize - i; | |
217 | /* palette_cmap provides space for only 16 colors at once */ | |
218 | if (n > 16) | |
219 | n = 16; | |
220 | palette_cmap.start = 32 + i; | |
221 | palette_cmap.len = n; | |
222 | for (j = 0; j < n; ++j) { | |
223 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
224 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
225 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
226 | clut += 3; | |
227 | } | |
228 | fb_set_cmap(&palette_cmap, info); | |
229 | } | |
230 | } | |
231 | ||
232 | static void fb_set_logo_truepalette(struct fb_info *info, | |
233 | const struct linux_logo *logo, | |
234 | u32 *palette) | |
235 | { | |
0128beee | 236 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
1da177e4 LT |
237 | unsigned char redmask, greenmask, bluemask; |
238 | int redshift, greenshift, blueshift; | |
239 | int i; | |
240 | const unsigned char *clut = logo->clut; | |
241 | ||
242 | /* | |
243 | * We have to create a temporary palette since console palette is only | |
244 | * 16 colors long. | |
245 | */ | |
246 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
247 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
248 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
249 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
250 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
251 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
252 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
253 | ||
254 | for ( i = 0; i < logo->clutsize; i++) { | |
255 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
256 | safe_shift((clut[1] & greenmask), greenshift) | | |
257 | safe_shift((clut[2] & bluemask), blueshift)); | |
258 | clut += 3; | |
259 | } | |
260 | } | |
261 | ||
262 | static void fb_set_logo_directpalette(struct fb_info *info, | |
263 | const struct linux_logo *logo, | |
264 | u32 *palette) | |
265 | { | |
266 | int redshift, greenshift, blueshift; | |
267 | int i; | |
268 | ||
269 | redshift = info->var.red.offset; | |
270 | greenshift = info->var.green.offset; | |
271 | blueshift = info->var.blue.offset; | |
272 | ||
cf7ee554 | 273 | for (i = 32; i < 32 + logo->clutsize; i++) |
1da177e4 LT |
274 | palette[i] = i << redshift | i << greenshift | i << blueshift; |
275 | } | |
276 | ||
277 | static void fb_set_logo(struct fb_info *info, | |
278 | const struct linux_logo *logo, u8 *dst, | |
279 | int depth) | |
280 | { | |
b8c90945 | 281 | int i, j, k; |
1da177e4 | 282 | const u8 *src = logo->data; |
b8c90945 AD |
283 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
284 | u8 fg = 1, d; | |
1da177e4 | 285 | |
1692b37c AD |
286 | switch (fb_get_color_depth(&info->var, &info->fix)) { |
287 | case 1: | |
288 | fg = 1; | |
289 | break; | |
290 | case 2: | |
291 | fg = 3; | |
292 | break; | |
293 | default: | |
1da177e4 | 294 | fg = 7; |
1692b37c AD |
295 | break; |
296 | } | |
1da177e4 | 297 | |
b8c90945 AD |
298 | if (info->fix.visual == FB_VISUAL_MONO01 || |
299 | info->fix.visual == FB_VISUAL_MONO10) | |
300 | fg = ~((u8) (0xfff << info->var.green.length)); | |
301 | ||
1da177e4 LT |
302 | switch (depth) { |
303 | case 4: | |
304 | for (i = 0; i < logo->height; i++) | |
305 | for (j = 0; j < logo->width; src++) { | |
306 | *dst++ = *src >> 4; | |
307 | j++; | |
308 | if (j < logo->width) { | |
309 | *dst++ = *src & 0x0f; | |
310 | j++; | |
311 | } | |
312 | } | |
313 | break; | |
314 | case 1: | |
315 | for (i = 0; i < logo->height; i++) { | |
316 | for (j = 0; j < logo->width; src++) { | |
317 | d = *src ^ xor; | |
318 | for (k = 7; k >= 0; k--) { | |
319 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
320 | j++; | |
321 | } | |
322 | } | |
323 | } | |
324 | break; | |
325 | } | |
326 | } | |
327 | ||
328 | /* | |
329 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
330 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
331 | * the visual format and color depth of the framebuffer, the DAC, the | |
332 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
333 | * | |
334 | * Case 1 - linux_logo_clut224: | |
335 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
336 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
337 | * | |
338 | * For visuals that require color info from the pseudo_palette, we also construct | |
339 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
340 | * will be set. | |
341 | * | |
342 | * Case 2 - linux_logo_vga16: | |
343 | * The number of colors just matches the console colors, thus there is no need | |
344 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
345 | * each byte contains color information for two pixels (upper and lower nibble). | |
346 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
347 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
348 | * | |
349 | * Case 3 - linux_logo_mono: | |
350 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
351 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
352 | * be set to 1. | |
353 | */ | |
354 | static struct logo_data { | |
355 | int depth; | |
356 | int needs_directpalette; | |
357 | int needs_truepalette; | |
358 | int needs_cmapreset; | |
359 | const struct linux_logo *logo; | |
0128beee | 360 | } fb_logo __read_mostly; |
1da177e4 | 361 | |
9c44e5f6 AD |
362 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
363 | { | |
364 | u32 size = width * height, i; | |
365 | ||
366 | out += size - 1; | |
367 | ||
368 | for (i = size; i--; ) | |
369 | *out-- = *in++; | |
370 | } | |
371 | ||
372 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
373 | { | |
f837e6f7 | 374 | int i, j, h = height - 1; |
9c44e5f6 AD |
375 | |
376 | for (i = 0; i < height; i++) | |
377 | for (j = 0; j < width; j++) | |
f837e6f7 | 378 | out[height * j + h - i] = *in++; |
9c44e5f6 AD |
379 | } |
380 | ||
381 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
382 | { | |
383 | int i, j, w = width - 1; | |
384 | ||
385 | for (i = 0; i < height; i++) | |
386 | for (j = 0; j < width; j++) | |
387 | out[height * (w - j) + i] = *in++; | |
388 | } | |
389 | ||
390 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
391 | struct fb_image *image, int rotate) | |
392 | { | |
393 | u32 tmp; | |
394 | ||
395 | if (rotate == FB_ROTATE_UD) { | |
9c44e5f6 AD |
396 | fb_rotate_logo_ud(image->data, dst, image->width, |
397 | image->height); | |
abed5d15 GU |
398 | image->dx = info->var.xres - image->width - image->dx; |
399 | image->dy = info->var.yres - image->height - image->dy; | |
9c44e5f6 | 400 | } else if (rotate == FB_ROTATE_CW) { |
9c44e5f6 AD |
401 | fb_rotate_logo_cw(image->data, dst, image->width, |
402 | image->height); | |
9c44e5f6 AD |
403 | tmp = image->width; |
404 | image->width = image->height; | |
405 | image->height = tmp; | |
abed5d15 GU |
406 | tmp = image->dy; |
407 | image->dy = image->dx; | |
408 | image->dx = info->var.xres - image->width - tmp; | |
f837e6f7 | 409 | } else if (rotate == FB_ROTATE_CCW) { |
9c44e5f6 AD |
410 | fb_rotate_logo_ccw(image->data, dst, image->width, |
411 | image->height); | |
f837e6f7 AD |
412 | tmp = image->width; |
413 | image->width = image->height; | |
414 | image->height = tmp; | |
abed5d15 GU |
415 | tmp = image->dx; |
416 | image->dx = image->dy; | |
417 | image->dy = info->var.yres - image->height - tmp; | |
9c44e5f6 AD |
418 | } |
419 | ||
420 | image->data = dst; | |
421 | } | |
422 | ||
423 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
448d4797 | 424 | int rotate, unsigned int num) |
9c44e5f6 | 425 | { |
448d4797 | 426 | unsigned int x; |
9c44e5f6 AD |
427 | |
428 | if (rotate == FB_ROTATE_UR) { | |
448d4797 GU |
429 | for (x = 0; |
430 | x < num && image->dx + image->width <= info->var.xres; | |
431 | x++) { | |
9c44e5f6 | 432 | info->fbops->fb_imageblit(info, image); |
448d4797 | 433 | image->dx += image->width + 8; |
9c44e5f6 AD |
434 | } |
435 | } else if (rotate == FB_ROTATE_UD) { | |
34bdb666 | 436 | for (x = 0; x < num; x++) { |
9c44e5f6 | 437 | info->fbops->fb_imageblit(info, image); |
448d4797 | 438 | image->dx -= image->width + 8; |
9c44e5f6 AD |
439 | } |
440 | } else if (rotate == FB_ROTATE_CW) { | |
448d4797 GU |
441 | for (x = 0; |
442 | x < num && image->dy + image->height <= info->var.yres; | |
443 | x++) { | |
9c44e5f6 | 444 | info->fbops->fb_imageblit(info, image); |
448d4797 | 445 | image->dy += image->height + 8; |
9c44e5f6 AD |
446 | } |
447 | } else if (rotate == FB_ROTATE_CCW) { | |
34bdb666 | 448 | for (x = 0; x < num; x++) { |
9c44e5f6 | 449 | info->fbops->fb_imageblit(info, image); |
448d4797 | 450 | image->dy -= image->height + 8; |
9c44e5f6 AD |
451 | } |
452 | } | |
453 | } | |
454 | ||
90da63e5 GU |
455 | static int fb_show_logo_line(struct fb_info *info, int rotate, |
456 | const struct linux_logo *logo, int y, | |
457 | unsigned int n) | |
1da177e4 LT |
458 | { |
459 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 460 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 461 | struct fb_image image; |
1da177e4 LT |
462 | |
463 | /* Return if the frame buffer is not mapped or suspended */ | |
90da63e5 | 464 | if (logo == NULL || info->state != FBINFO_STATE_RUNNING || |
70802c60 | 465 | info->flags & FBINFO_MODULE) |
1da177e4 LT |
466 | return 0; |
467 | ||
468 | image.depth = 8; | |
90da63e5 | 469 | image.data = logo->data; |
1da177e4 LT |
470 | |
471 | if (fb_logo.needs_cmapreset) | |
90da63e5 | 472 | fb_set_logocmap(info, logo); |
1da177e4 | 473 | |
9900abfb | 474 | if (fb_logo.needs_truepalette || |
1da177e4 LT |
475 | fb_logo.needs_directpalette) { |
476 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
477 | if (palette == NULL) | |
478 | return 0; | |
479 | ||
480 | if (fb_logo.needs_truepalette) | |
90da63e5 | 481 | fb_set_logo_truepalette(info, logo, palette); |
1da177e4 | 482 | else |
90da63e5 | 483 | fb_set_logo_directpalette(info, logo, palette); |
1da177e4 LT |
484 | |
485 | saved_pseudo_palette = info->pseudo_palette; | |
486 | info->pseudo_palette = palette; | |
487 | } | |
488 | ||
489 | if (fb_logo.depth <= 4) { | |
90da63e5 | 490 | logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL); |
1da177e4 LT |
491 | if (logo_new == NULL) { |
492 | kfree(palette); | |
493 | if (saved_pseudo_palette) | |
494 | info->pseudo_palette = saved_pseudo_palette; | |
495 | return 0; | |
496 | } | |
497 | image.data = logo_new; | |
90da63e5 | 498 | fb_set_logo(info, logo, logo_new, fb_logo.depth); |
1da177e4 LT |
499 | } |
500 | ||
9c44e5f6 | 501 | image.dx = 0; |
90da63e5 GU |
502 | image.dy = y; |
503 | image.width = logo->width; | |
504 | image.height = logo->height; | |
1da177e4 | 505 | |
9c44e5f6 | 506 | if (rotate) { |
90da63e5 GU |
507 | logo_rotate = kmalloc(logo->width * |
508 | logo->height, GFP_KERNEL); | |
9c44e5f6 AD |
509 | if (logo_rotate) |
510 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 511 | } |
9c44e5f6 | 512 | |
90da63e5 | 513 | fb_do_show_logo(info, &image, rotate, n); |
9c44e5f6 | 514 | |
1da177e4 LT |
515 | kfree(palette); |
516 | if (saved_pseudo_palette != NULL) | |
517 | info->pseudo_palette = saved_pseudo_palette; | |
518 | kfree(logo_new); | |
9c44e5f6 | 519 | kfree(logo_rotate); |
90da63e5 GU |
520 | return logo->height; |
521 | } | |
522 | ||
9900abfb GU |
523 | |
524 | #ifdef CONFIG_FB_LOGO_EXTRA | |
525 | ||
526 | #define FB_LOGO_EX_NUM_MAX 10 | |
527 | static struct logo_data_extra { | |
528 | const struct linux_logo *logo; | |
529 | unsigned int n; | |
530 | } fb_logo_ex[FB_LOGO_EX_NUM_MAX]; | |
531 | static unsigned int fb_logo_ex_num; | |
532 | ||
533 | void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n) | |
534 | { | |
535 | if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX) | |
536 | return; | |
537 | ||
538 | fb_logo_ex[fb_logo_ex_num].logo = logo; | |
539 | fb_logo_ex[fb_logo_ex_num].n = n; | |
540 | fb_logo_ex_num++; | |
541 | } | |
542 | ||
543 | static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height, | |
544 | unsigned int yres) | |
545 | { | |
546 | unsigned int i; | |
547 | ||
548 | /* FIXME: logo_ex supports only truecolor fb. */ | |
549 | if (info->fix.visual != FB_VISUAL_TRUECOLOR) | |
550 | fb_logo_ex_num = 0; | |
551 | ||
552 | for (i = 0; i < fb_logo_ex_num; i++) { | |
4fb6de25 GU |
553 | if (fb_logo_ex[i].logo->type != fb_logo.logo->type) { |
554 | fb_logo_ex[i].logo = NULL; | |
555 | continue; | |
556 | } | |
9900abfb GU |
557 | height += fb_logo_ex[i].logo->height; |
558 | if (height > yres) { | |
559 | height -= fb_logo_ex[i].logo->height; | |
560 | fb_logo_ex_num = i; | |
561 | break; | |
562 | } | |
563 | } | |
564 | return height; | |
565 | } | |
566 | ||
567 | static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
568 | { | |
569 | unsigned int i; | |
570 | ||
571 | for (i = 0; i < fb_logo_ex_num; i++) | |
572 | y += fb_show_logo_line(info, rotate, | |
573 | fb_logo_ex[i].logo, y, fb_logo_ex[i].n); | |
574 | ||
575 | return y; | |
576 | } | |
577 | ||
578 | #else /* !CONFIG_FB_LOGO_EXTRA */ | |
579 | ||
580 | static inline int fb_prepare_extra_logos(struct fb_info *info, | |
581 | unsigned int height, | |
582 | unsigned int yres) | |
583 | { | |
584 | return height; | |
585 | } | |
586 | ||
587 | static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
588 | { | |
589 | return y; | |
590 | } | |
591 | ||
592 | #endif /* CONFIG_FB_LOGO_EXTRA */ | |
593 | ||
594 | ||
595 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
596 | { | |
597 | int depth = fb_get_color_depth(&info->var, &info->fix); | |
598 | unsigned int yres; | |
599 | ||
600 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
601 | ||
602 | if (info->flags & FBINFO_MISC_TILEBLITTING || | |
603 | info->flags & FBINFO_MODULE) | |
604 | return 0; | |
605 | ||
606 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
607 | depth = info->var.blue.length; | |
608 | if (info->var.red.length < depth) | |
609 | depth = info->var.red.length; | |
610 | if (info->var.green.length < depth) | |
611 | depth = info->var.green.length; | |
612 | } | |
613 | ||
614 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { | |
615 | /* assume console colormap */ | |
616 | depth = 4; | |
617 | } | |
618 | ||
9900abfb GU |
619 | /* Return if no suitable logo was found */ |
620 | fb_logo.logo = fb_find_logo(depth); | |
621 | ||
622 | if (!fb_logo.logo) { | |
623 | return 0; | |
624 | } | |
625 | ||
626 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) | |
627 | yres = info->var.yres; | |
628 | else | |
629 | yres = info->var.xres; | |
630 | ||
631 | if (fb_logo.logo->height > yres) { | |
632 | fb_logo.logo = NULL; | |
633 | return 0; | |
634 | } | |
635 | ||
636 | /* What depth we asked for might be different from what we get */ | |
637 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
638 | fb_logo.depth = 8; | |
639 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
640 | fb_logo.depth = 4; | |
641 | else | |
642 | fb_logo.depth = 1; | |
643 | ||
1692b37c AD |
644 | |
645 | if (fb_logo.depth > 4 && depth > 4) { | |
646 | switch (info->fix.visual) { | |
647 | case FB_VISUAL_TRUECOLOR: | |
648 | fb_logo.needs_truepalette = 1; | |
649 | break; | |
650 | case FB_VISUAL_DIRECTCOLOR: | |
651 | fb_logo.needs_directpalette = 1; | |
652 | fb_logo.needs_cmapreset = 1; | |
653 | break; | |
654 | case FB_VISUAL_PSEUDOCOLOR: | |
655 | fb_logo.needs_cmapreset = 1; | |
656 | break; | |
657 | } | |
658 | } | |
659 | ||
9900abfb GU |
660 | return fb_prepare_extra_logos(info, fb_logo.logo->height, yres); |
661 | } | |
662 | ||
90da63e5 GU |
663 | int fb_show_logo(struct fb_info *info, int rotate) |
664 | { | |
9900abfb GU |
665 | int y; |
666 | ||
667 | y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, | |
668 | num_online_cpus()); | |
669 | y = fb_show_extra_logos(info, y, rotate); | |
670 | ||
671 | return y; | |
1da177e4 LT |
672 | } |
673 | #else | |
9c44e5f6 AD |
674 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
675 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 | 676 | #endif /* CONFIG_LOGO */ |
23e51f87 | 677 | EXPORT_SYMBOL(fb_prepare_logo); |
9c29fba1 | 678 | EXPORT_SYMBOL(fb_show_logo); |
1da177e4 | 679 | |
0aa16341 AD |
680 | static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
681 | { | |
698b3682 | 682 | mutex_lock(®istration_lock); |
0aa16341 AD |
683 | return (*pos < FB_MAX) ? pos : NULL; |
684 | } | |
685 | ||
686 | static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) | |
687 | { | |
688 | (*pos)++; | |
689 | return (*pos < FB_MAX) ? pos : NULL; | |
690 | } | |
691 | ||
692 | static void fb_seq_stop(struct seq_file *m, void *v) | |
1da177e4 | 693 | { |
698b3682 | 694 | mutex_unlock(®istration_lock); |
1da177e4 LT |
695 | } |
696 | ||
0aa16341 AD |
697 | static int fb_seq_show(struct seq_file *m, void *v) |
698 | { | |
699 | int i = *(loff_t *)v; | |
700 | struct fb_info *fi = registered_fb[i]; | |
701 | ||
702 | if (fi) | |
703 | seq_printf(m, "%d %s\n", fi->node, fi->fix.id); | |
704 | return 0; | |
705 | } | |
706 | ||
707 | static const struct seq_operations proc_fb_seq_ops = { | |
708 | .start = fb_seq_start, | |
709 | .next = fb_seq_next, | |
710 | .stop = fb_seq_stop, | |
711 | .show = fb_seq_show, | |
712 | }; | |
713 | ||
714 | static int proc_fb_open(struct inode *inode, struct file *file) | |
715 | { | |
716 | return seq_open(file, &proc_fb_seq_ops); | |
717 | } | |
718 | ||
719 | static const struct file_operations fb_proc_fops = { | |
720 | .owner = THIS_MODULE, | |
721 | .open = proc_fb_open, | |
722 | .read = seq_read, | |
723 | .llseek = seq_lseek, | |
724 | .release = seq_release, | |
725 | }; | |
726 | ||
c47747fd LT |
727 | /* |
728 | * We hold a reference to the fb_info in file->private_data, | |
729 | * but if the current registered fb has changed, we don't | |
730 | * actually want to use it. | |
731 | * | |
732 | * So look up the fb_info using the inode minor number, | |
733 | * and just verify it against the reference we have. | |
734 | */ | |
735 | static struct fb_info *file_fb_info(struct file *file) | |
1da177e4 | 736 | { |
496ad9aa | 737 | struct inode *inode = file_inode(file); |
1da177e4 LT |
738 | int fbidx = iminor(inode); |
739 | struct fb_info *info = registered_fb[fbidx]; | |
c47747fd LT |
740 | |
741 | if (info != file->private_data) | |
742 | info = NULL; | |
743 | return info; | |
744 | } | |
745 | ||
746 | static ssize_t | |
747 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
748 | { | |
749 | unsigned long p = *ppos; | |
750 | struct fb_info *info = file_fb_info(file); | |
f11b478d JH |
751 | u8 *buffer, *dst; |
752 | u8 __iomem *src; | |
753 | int c, cnt = 0, err = 0; | |
1da177e4 LT |
754 | unsigned long total_size; |
755 | ||
756 | if (!info || ! info->screen_base) | |
757 | return -ENODEV; | |
758 | ||
759 | if (info->state != FBINFO_STATE_RUNNING) | |
760 | return -EPERM; | |
761 | ||
762 | if (info->fbops->fb_read) | |
3f9b0880 | 763 | return info->fbops->fb_read(info, buf, count, ppos); |
1da177e4 LT |
764 | |
765 | total_size = info->screen_size; | |
0a484a3a | 766 | |
1da177e4 LT |
767 | if (total_size == 0) |
768 | total_size = info->fix.smem_len; | |
769 | ||
770 | if (p >= total_size) | |
0a484a3a AD |
771 | return 0; |
772 | ||
1da177e4 | 773 | if (count >= total_size) |
0a484a3a AD |
774 | count = total_size; |
775 | ||
1da177e4 LT |
776 | if (count + p > total_size) |
777 | count = total_size - p; | |
778 | ||
1da177e4 LT |
779 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
780 | GFP_KERNEL); | |
781 | if (!buffer) | |
782 | return -ENOMEM; | |
783 | ||
f11b478d | 784 | src = (u8 __iomem *) (info->screen_base + p); |
1da177e4 LT |
785 | |
786 | if (info->fbops->fb_sync) | |
787 | info->fbops->fb_sync(info); | |
788 | ||
789 | while (count) { | |
790 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
791 | dst = buffer; | |
f11b478d JH |
792 | fb_memcpy_fromfb(dst, src, c); |
793 | dst += c; | |
794 | src += c; | |
1da177e4 LT |
795 | |
796 | if (copy_to_user(buf, buffer, c)) { | |
797 | err = -EFAULT; | |
798 | break; | |
799 | } | |
800 | *ppos += c; | |
801 | buf += c; | |
802 | cnt += c; | |
803 | count -= c; | |
804 | } | |
805 | ||
806 | kfree(buffer); | |
0a484a3a | 807 | |
1da177e4 LT |
808 | return (err) ? err : cnt; |
809 | } | |
810 | ||
811 | static ssize_t | |
812 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
813 | { | |
814 | unsigned long p = *ppos; | |
c47747fd | 815 | struct fb_info *info = file_fb_info(file); |
f11b478d JH |
816 | u8 *buffer, *src; |
817 | u8 __iomem *dst; | |
818 | int c, cnt = 0, err = 0; | |
1da177e4 LT |
819 | unsigned long total_size; |
820 | ||
821 | if (!info || !info->screen_base) | |
822 | return -ENODEV; | |
823 | ||
824 | if (info->state != FBINFO_STATE_RUNNING) | |
825 | return -EPERM; | |
826 | ||
827 | if (info->fbops->fb_write) | |
3f9b0880 | 828 | return info->fbops->fb_write(info, buf, count, ppos); |
1da177e4 LT |
829 | |
830 | total_size = info->screen_size; | |
0a484a3a | 831 | |
1da177e4 LT |
832 | if (total_size == 0) |
833 | total_size = info->fix.smem_len; | |
834 | ||
835 | if (p > total_size) | |
6a2a8866 | 836 | return -EFBIG; |
0a484a3a | 837 | |
6a2a8866 AD |
838 | if (count > total_size) { |
839 | err = -EFBIG; | |
0a484a3a | 840 | count = total_size; |
6a2a8866 AD |
841 | } |
842 | ||
843 | if (count + p > total_size) { | |
844 | if (!err) | |
845 | err = -ENOSPC; | |
0a484a3a | 846 | |
0a484a3a | 847 | count = total_size - p; |
6a2a8866 | 848 | } |
0a484a3a | 849 | |
1da177e4 LT |
850 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
851 | GFP_KERNEL); | |
852 | if (!buffer) | |
853 | return -ENOMEM; | |
854 | ||
f11b478d | 855 | dst = (u8 __iomem *) (info->screen_base + p); |
1da177e4 LT |
856 | |
857 | if (info->fbops->fb_sync) | |
858 | info->fbops->fb_sync(info); | |
859 | ||
860 | while (count) { | |
861 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
862 | src = buffer; | |
0a484a3a | 863 | |
1da177e4 LT |
864 | if (copy_from_user(src, buf, c)) { |
865 | err = -EFAULT; | |
866 | break; | |
867 | } | |
0a484a3a | 868 | |
f11b478d JH |
869 | fb_memcpy_tofb(dst, src, c); |
870 | dst += c; | |
871 | src += c; | |
1da177e4 LT |
872 | *ppos += c; |
873 | buf += c; | |
874 | cnt += c; | |
875 | count -= c; | |
876 | } | |
0a484a3a | 877 | |
1da177e4 LT |
878 | kfree(buffer); |
879 | ||
6a2a8866 | 880 | return (cnt) ? cnt : err; |
1da177e4 LT |
881 | } |
882 | ||
1da177e4 LT |
883 | int |
884 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
885 | { | |
1207069f | 886 | struct fb_fix_screeninfo *fix = &info->fix; |
7572a1ea VS |
887 | unsigned int yres = info->var.yres; |
888 | int err = 0; | |
1207069f AD |
889 | |
890 | if (var->yoffset > 0) { | |
891 | if (var->vmode & FB_VMODE_YWRAP) { | |
892 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
893 | err = -EINVAL; | |
894 | else | |
895 | yres = 0; | |
896 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
897 | err = -EINVAL; | |
898 | } | |
899 | ||
900 | if (var->xoffset > 0 && (!fix->xpanstep || | |
901 | (var->xoffset % fix->xpanstep))) | |
902 | err = -EINVAL; | |
903 | ||
7572a1ea | 904 | if (err || !info->fbops->fb_pan_display || |
99e9e7d6 FTS |
905 | var->yoffset > info->var.yres_virtual - yres || |
906 | var->xoffset > info->var.xres_virtual - info->var.xres) | |
1207069f | 907 | return -EINVAL; |
1da177e4 | 908 | |
1da177e4 LT |
909 | if ((err = info->fbops->fb_pan_display(var, info))) |
910 | return err; | |
c9c62dce JH |
911 | info->var.xoffset = var->xoffset; |
912 | info->var.yoffset = var->yoffset; | |
913 | if (var->vmode & FB_VMODE_YWRAP) | |
914 | info->var.vmode |= FB_VMODE_YWRAP; | |
915 | else | |
916 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
917 | return 0; | |
1da177e4 | 918 | } |
9c29fba1 | 919 | EXPORT_SYMBOL(fb_pan_display); |
1da177e4 | 920 | |
38a3dc51 AD |
921 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
922 | u32 activate) | |
923 | { | |
924 | struct fb_event event; | |
925 | struct fb_blit_caps caps, fbcaps; | |
926 | int err = 0; | |
927 | ||
928 | memset(&caps, 0, sizeof(caps)); | |
929 | memset(&fbcaps, 0, sizeof(fbcaps)); | |
930 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; | |
931 | event.info = info; | |
932 | event.data = ∩︀ | |
933 | fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); | |
934 | info->fbops->fb_get_caps(info, &fbcaps, var); | |
935 | ||
936 | if (((fbcaps.x ^ caps.x) & caps.x) || | |
937 | ((fbcaps.y ^ caps.y) & caps.y) || | |
938 | (fbcaps.len < caps.len)) | |
939 | err = -EINVAL; | |
940 | ||
941 | return err; | |
942 | } | |
943 | ||
1da177e4 LT |
944 | int |
945 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
946 | { | |
b1e7223f AD |
947 | int flags = info->flags; |
948 | int ret = 0; | |
1da177e4 LT |
949 | |
950 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
951 | struct fb_videomode mode1, mode2; | |
1da177e4 LT |
952 | |
953 | fb_var_to_videomode(&mode1, var); | |
954 | fb_var_to_videomode(&mode2, &info->var); | |
955 | /* make sure we don't delete the videomode of current var */ | |
956 | ret = fb_mode_is_equal(&mode1, &mode2); | |
957 | ||
958 | if (!ret) { | |
959 | struct fb_event event; | |
960 | ||
961 | event.info = info; | |
962 | event.data = &mode1; | |
256154fb | 963 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
1da177e4 LT |
964 | } |
965 | ||
966 | if (!ret) | |
967 | fb_delete_videomode(&mode1, &info->modelist); | |
968 | ||
b1e7223f AD |
969 | |
970 | ret = (ret) ? -EINVAL : 0; | |
971 | goto done; | |
1da177e4 LT |
972 | } |
973 | ||
974 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
975 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
4941cb7a AD |
976 | u32 activate = var->activate; |
977 | ||
fb21c2f4 LP |
978 | /* When using FOURCC mode, make sure the red, green, blue and |
979 | * transp fields are set to 0. | |
980 | */ | |
981 | if ((info->fix.capabilities & FB_CAP_FOURCC) && | |
982 | var->grayscale > 1) { | |
983 | if (var->red.offset || var->green.offset || | |
984 | var->blue.offset || var->transp.offset || | |
985 | var->red.length || var->green.length || | |
986 | var->blue.length || var->transp.length || | |
987 | var->red.msb_right || var->green.msb_right || | |
988 | var->blue.msb_right || var->transp.msb_right) | |
989 | return -EINVAL; | |
990 | } | |
991 | ||
1da177e4 LT |
992 | if (!info->fbops->fb_check_var) { |
993 | *var = info->var; | |
b1e7223f | 994 | goto done; |
1da177e4 LT |
995 | } |
996 | ||
b1e7223f AD |
997 | ret = info->fbops->fb_check_var(var, info); |
998 | ||
999 | if (ret) | |
1000 | goto done; | |
1da177e4 LT |
1001 | |
1002 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
0fcf6ada | 1003 | struct fb_var_screeninfo old_var; |
1da177e4 | 1004 | struct fb_videomode mode; |
1da177e4 | 1005 | |
38a3dc51 | 1006 | if (info->fbops->fb_get_caps) { |
b1e7223f | 1007 | ret = fb_check_caps(info, var, activate); |
38a3dc51 | 1008 | |
b1e7223f | 1009 | if (ret) |
38a3dc51 AD |
1010 | goto done; |
1011 | } | |
1012 | ||
0fcf6ada | 1013 | old_var = info->var; |
1da177e4 | 1014 | info->var = *var; |
38a3dc51 | 1015 | |
0fcf6ada FTS |
1016 | if (info->fbops->fb_set_par) { |
1017 | ret = info->fbops->fb_set_par(info); | |
1018 | ||
1019 | if (ret) { | |
1020 | info->var = old_var; | |
1021 | printk(KERN_WARNING "detected " | |
1022 | "fb_set_par error, " | |
1023 | "error code: %d\n", ret); | |
1024 | goto done; | |
1025 | } | |
1026 | } | |
1da177e4 LT |
1027 | |
1028 | fb_pan_display(info, &info->var); | |
1da177e4 | 1029 | fb_set_cmap(&info->cmap, info); |
1da177e4 LT |
1030 | fb_var_to_videomode(&mode, &info->var); |
1031 | ||
1032 | if (info->modelist.prev && info->modelist.next && | |
1033 | !list_empty(&info->modelist)) | |
b1e7223f | 1034 | ret = fb_add_videomode(&mode, &info->modelist); |
1da177e4 | 1035 | |
b1e7223f | 1036 | if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 1037 | struct fb_event event; |
4941cb7a | 1038 | int evnt = (activate & FB_ACTIVATE_ALL) ? |
7726e9e1 AD |
1039 | FB_EVENT_MODE_CHANGE_ALL : |
1040 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
1041 | |
1042 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
1043 | event.info = info; | |
faa312da | 1044 | event.data = &mode; |
256154fb | 1045 | fb_notifier_call_chain(evnt, &event); |
1da177e4 LT |
1046 | } |
1047 | } | |
1048 | } | |
38a3dc51 AD |
1049 | |
1050 | done: | |
b1e7223f | 1051 | return ret; |
1da177e4 | 1052 | } |
9c29fba1 | 1053 | EXPORT_SYMBOL(fb_set_var); |
1da177e4 LT |
1054 | |
1055 | int | |
1056 | fb_blank(struct fb_info *info, int blank) | |
1057 | { | |
bf05929f ID |
1058 | struct fb_event event; |
1059 | int ret = -EINVAL, early_ret; | |
1da177e4 LT |
1060 | |
1061 | if (blank > FB_BLANK_POWERDOWN) | |
1062 | blank = FB_BLANK_POWERDOWN; | |
1063 | ||
bf05929f ID |
1064 | event.info = info; |
1065 | event.data = ␣ | |
1066 | ||
1067 | early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event); | |
1068 | ||
1da177e4 LT |
1069 | if (info->fbops->fb_blank) |
1070 | ret = info->fbops->fb_blank(blank, info); | |
1071 | ||
bf05929f | 1072 | if (!ret) |
256154fb | 1073 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
bf05929f ID |
1074 | else { |
1075 | /* | |
1076 | * if fb_blank is failed then revert effects of | |
1077 | * the early blank event. | |
1078 | */ | |
1079 | if (!early_ret) | |
1080 | fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK, &event); | |
1da177e4 LT |
1081 | } |
1082 | ||
1083 | return ret; | |
1084 | } | |
9c29fba1 | 1085 | EXPORT_SYMBOL(fb_blank); |
1da177e4 | 1086 | |
a684e7d3 GU |
1087 | static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, |
1088 | unsigned long arg) | |
1da177e4 | 1089 | { |
e5367711 | 1090 | struct fb_ops *fb; |
1da177e4 LT |
1091 | struct fb_var_screeninfo var; |
1092 | struct fb_fix_screeninfo fix; | |
1093 | struct fb_con2fbmap con2fb; | |
1f5e31d7 | 1094 | struct fb_cmap cmap_from; |
1da177e4 LT |
1095 | struct fb_cmap_user cmap; |
1096 | struct fb_event event; | |
1097 | void __user *argp = (void __user *)arg; | |
e5367711 AC |
1098 | long ret = 0; |
1099 | ||
1da177e4 LT |
1100 | switch (cmd) { |
1101 | case FBIOGET_VSCREENINFO: | |
1f5e31d7 AR |
1102 | if (!lock_fb_info(info)) |
1103 | return -ENODEV; | |
1104 | var = info->var; | |
1105 | unlock_fb_info(info); | |
1106 | ||
1107 | ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0; | |
e5367711 | 1108 | break; |
1da177e4 | 1109 | case FBIOPUT_VSCREENINFO: |
1f5e31d7 AR |
1110 | if (copy_from_user(&var, argp, sizeof(var))) |
1111 | return -EFAULT; | |
ac751efa | 1112 | console_lock(); |
3a41c5db GZ |
1113 | if (!lock_fb_info(info)) { |
1114 | console_unlock(); | |
1115 | return -ENODEV; | |
1116 | } | |
1da177e4 | 1117 | info->flags |= FBINFO_MISC_USEREVENT; |
e5367711 | 1118 | ret = fb_set_var(info, &var); |
1da177e4 | 1119 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1f5e31d7 | 1120 | unlock_fb_info(info); |
3a41c5db | 1121 | console_unlock(); |
1f5e31d7 | 1122 | if (!ret && copy_to_user(argp, &var, sizeof(var))) |
e5367711 AC |
1123 | ret = -EFAULT; |
1124 | break; | |
1da177e4 | 1125 | case FBIOGET_FSCREENINFO: |
1f5e31d7 AR |
1126 | if (!lock_fb_info(info)) |
1127 | return -ENODEV; | |
1128 | fix = info->fix; | |
1129 | unlock_fb_info(info); | |
1130 | ||
1131 | ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0; | |
e5367711 | 1132 | break; |
1da177e4 LT |
1133 | case FBIOPUTCMAP: |
1134 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1f5e31d7 AR |
1135 | return -EFAULT; |
1136 | ret = fb_set_user_cmap(&cmap, info); | |
e5367711 | 1137 | break; |
1da177e4 LT |
1138 | case FBIOGETCMAP: |
1139 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1f5e31d7 AR |
1140 | return -EFAULT; |
1141 | if (!lock_fb_info(info)) | |
1142 | return -ENODEV; | |
1143 | cmap_from = info->cmap; | |
1144 | unlock_fb_info(info); | |
1145 | ret = fb_cmap_to_user(&cmap_from, &cmap); | |
e5367711 | 1146 | break; |
1da177e4 | 1147 | case FBIOPAN_DISPLAY: |
1f5e31d7 AR |
1148 | if (copy_from_user(&var, argp, sizeof(var))) |
1149 | return -EFAULT; | |
ac751efa | 1150 | console_lock(); |
3a41c5db GZ |
1151 | if (!lock_fb_info(info)) { |
1152 | console_unlock(); | |
1153 | return -ENODEV; | |
1154 | } | |
e5367711 | 1155 | ret = fb_pan_display(info, &var); |
1f5e31d7 | 1156 | unlock_fb_info(info); |
3a41c5db | 1157 | console_unlock(); |
e5367711 | 1158 | if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
1f5e31d7 | 1159 | return -EFAULT; |
e5367711 | 1160 | break; |
1da177e4 | 1161 | case FBIO_CURSOR: |
e5367711 AC |
1162 | ret = -EINVAL; |
1163 | break; | |
1da177e4 LT |
1164 | case FBIOGET_CON2FBMAP: |
1165 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
1f5e31d7 AR |
1166 | return -EFAULT; |
1167 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
1168 | return -EINVAL; | |
1169 | con2fb.framebuffer = -1; | |
1170 | event.data = &con2fb; | |
513adb58 AR |
1171 | if (!lock_fb_info(info)) |
1172 | return -ENODEV; | |
1f5e31d7 AR |
1173 | event.info = info; |
1174 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); | |
513adb58 | 1175 | unlock_fb_info(info); |
1f5e31d7 | 1176 | ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; |
e5367711 | 1177 | break; |
1da177e4 | 1178 | case FBIOPUT_CON2FBMAP: |
1f5e31d7 AR |
1179 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) |
1180 | return -EFAULT; | |
1181 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
1182 | return -EINVAL; | |
34bdb666 | 1183 | if (con2fb.framebuffer >= FB_MAX) |
1f5e31d7 | 1184 | return -EINVAL; |
1da177e4 | 1185 | if (!registered_fb[con2fb.framebuffer]) |
e5367711 AC |
1186 | request_module("fb%d", con2fb.framebuffer); |
1187 | if (!registered_fb[con2fb.framebuffer]) { | |
1188 | ret = -EINVAL; | |
1189 | break; | |
1190 | } | |
1da177e4 | 1191 | event.data = &con2fb; |
054430e7 | 1192 | console_lock(); |
3a41c5db GZ |
1193 | if (!lock_fb_info(info)) { |
1194 | console_unlock(); | |
1195 | return -ENODEV; | |
1196 | } | |
1f5e31d7 | 1197 | event.info = info; |
66c1ca01 | 1198 | ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event); |
513adb58 | 1199 | unlock_fb_info(info); |
3a41c5db | 1200 | console_unlock(); |
e5367711 | 1201 | break; |
1da177e4 | 1202 | case FBIOBLANK: |
ac751efa | 1203 | console_lock(); |
3a41c5db GZ |
1204 | if (!lock_fb_info(info)) { |
1205 | console_unlock(); | |
1206 | return -ENODEV; | |
1207 | } | |
1da177e4 | 1208 | info->flags |= FBINFO_MISC_USEREVENT; |
e5367711 | 1209 | ret = fb_blank(info, arg); |
1da177e4 | 1210 | info->flags &= ~FBINFO_MISC_USEREVENT; |
1f5e31d7 | 1211 | unlock_fb_info(info); |
3a41c5db | 1212 | console_unlock(); |
1f5e31d7 | 1213 | break; |
1da177e4 | 1214 | default: |
1f5e31d7 AR |
1215 | if (!lock_fb_info(info)) |
1216 | return -ENODEV; | |
1217 | fb = info->fbops; | |
1218 | if (fb->fb_ioctl) | |
e5367711 | 1219 | ret = fb->fb_ioctl(info, cmd, arg); |
1f5e31d7 AR |
1220 | else |
1221 | ret = -ENOTTY; | |
1222 | unlock_fb_info(info); | |
1da177e4 | 1223 | } |
a684e7d3 GU |
1224 | return ret; |
1225 | } | |
1226 | ||
1227 | static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
a684e7d3 | 1228 | { |
c47747fd | 1229 | struct fb_info *info = file_fb_info(file); |
a684e7d3 | 1230 | |
c47747fd LT |
1231 | if (!info) |
1232 | return -ENODEV; | |
1f5e31d7 | 1233 | return do_fb_ioctl(info, cmd, arg); |
1da177e4 LT |
1234 | } |
1235 | ||
1236 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
1237 | struct fb_fix_screeninfo32 { |
1238 | char id[16]; | |
1239 | compat_caddr_t smem_start; | |
1240 | u32 smem_len; | |
1241 | u32 type; | |
1242 | u32 type_aux; | |
1243 | u32 visual; | |
1244 | u16 xpanstep; | |
1245 | u16 ypanstep; | |
1246 | u16 ywrapstep; | |
1247 | u32 line_length; | |
1248 | compat_caddr_t mmio_start; | |
1249 | u32 mmio_len; | |
1250 | u32 accel; | |
1251 | u16 reserved[3]; | |
1252 | }; | |
1253 | ||
1254 | struct fb_cmap32 { | |
1255 | u32 start; | |
1256 | u32 len; | |
1257 | compat_caddr_t red; | |
1258 | compat_caddr_t green; | |
1259 | compat_caddr_t blue; | |
1260 | compat_caddr_t transp; | |
1261 | }; | |
1262 | ||
a684e7d3 GU |
1263 | static int fb_getput_cmap(struct fb_info *info, unsigned int cmd, |
1264 | unsigned long arg) | |
c7f82d9c AB |
1265 | { |
1266 | struct fb_cmap_user __user *cmap; | |
1267 | struct fb_cmap32 __user *cmap32; | |
1268 | __u32 data; | |
1269 | int err; | |
1270 | ||
1271 | cmap = compat_alloc_user_space(sizeof(*cmap)); | |
1272 | cmap32 = compat_ptr(arg); | |
1273 | ||
1274 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) | |
1275 | return -EFAULT; | |
1276 | ||
1277 | if (get_user(data, &cmap32->red) || | |
1278 | put_user(compat_ptr(data), &cmap->red) || | |
1279 | get_user(data, &cmap32->green) || | |
1280 | put_user(compat_ptr(data), &cmap->green) || | |
1281 | get_user(data, &cmap32->blue) || | |
1282 | put_user(compat_ptr(data), &cmap->blue) || | |
1283 | get_user(data, &cmap32->transp) || | |
1284 | put_user(compat_ptr(data), &cmap->transp)) | |
1285 | return -EFAULT; | |
1286 | ||
a684e7d3 | 1287 | err = do_fb_ioctl(info, cmd, (unsigned long) cmap); |
c7f82d9c AB |
1288 | |
1289 | if (!err) { | |
1290 | if (copy_in_user(&cmap32->start, | |
1291 | &cmap->start, | |
1292 | 2 * sizeof(__u32))) | |
1293 | err = -EFAULT; | |
1294 | } | |
1295 | return err; | |
1296 | } | |
1297 | ||
1298 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1299 | struct fb_fix_screeninfo32 __user *fix32) | |
1300 | { | |
1301 | __u32 data; | |
1302 | int err; | |
1303 | ||
1304 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1305 | ||
1306 | data = (__u32) (unsigned long) fix->smem_start; | |
1307 | err |= put_user(data, &fix32->smem_start); | |
1308 | ||
1309 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1310 | err |= put_user(fix->type, &fix32->type); | |
1311 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1312 | err |= put_user(fix->visual, &fix32->visual); | |
1313 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1314 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1315 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1316 | err |= put_user(fix->line_length, &fix32->line_length); | |
1317 | ||
1318 | data = (__u32) (unsigned long) fix->mmio_start; | |
1319 | err |= put_user(data, &fix32->mmio_start); | |
1320 | ||
1321 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1322 | err |= put_user(fix->accel, &fix32->accel); | |
1323 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1324 | sizeof(fix->reserved)); | |
1325 | ||
2c30aba2 DC |
1326 | if (err) |
1327 | return -EFAULT; | |
1328 | return 0; | |
c7f82d9c AB |
1329 | } |
1330 | ||
a684e7d3 GU |
1331 | static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, |
1332 | unsigned long arg) | |
c7f82d9c AB |
1333 | { |
1334 | mm_segment_t old_fs; | |
1335 | struct fb_fix_screeninfo fix; | |
1336 | struct fb_fix_screeninfo32 __user *fix32; | |
1337 | int err; | |
1338 | ||
1339 | fix32 = compat_ptr(arg); | |
1340 | ||
1341 | old_fs = get_fs(); | |
1342 | set_fs(KERNEL_DS); | |
a684e7d3 | 1343 | err = do_fb_ioctl(info, cmd, (unsigned long) &fix); |
c7f82d9c AB |
1344 | set_fs(old_fs); |
1345 | ||
1346 | if (!err) | |
1347 | err = do_fscreeninfo_to_user(&fix, fix32); | |
1348 | ||
1349 | return err; | |
1350 | } | |
1351 | ||
a684e7d3 GU |
1352 | static long fb_compat_ioctl(struct file *file, unsigned int cmd, |
1353 | unsigned long arg) | |
1da177e4 | 1354 | { |
c47747fd LT |
1355 | struct fb_info *info = file_fb_info(file); |
1356 | struct fb_ops *fb; | |
c7f82d9c | 1357 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1358 | |
c47747fd LT |
1359 | if (!info) |
1360 | return -ENODEV; | |
1361 | fb = info->fbops; | |
c7f82d9c AB |
1362 | switch(cmd) { |
1363 | case FBIOGET_VSCREENINFO: | |
1364 | case FBIOPUT_VSCREENINFO: | |
1365 | case FBIOPAN_DISPLAY: | |
1366 | case FBIOGET_CON2FBMAP: | |
1367 | case FBIOPUT_CON2FBMAP: | |
1368 | arg = (unsigned long) compat_ptr(arg); | |
1369 | case FBIOBLANK: | |
a684e7d3 GU |
1370 | ret = do_fb_ioctl(info, cmd, arg); |
1371 | break; | |
c7f82d9c AB |
1372 | |
1373 | case FBIOGET_FSCREENINFO: | |
a684e7d3 | 1374 | ret = fb_get_fscreeninfo(info, cmd, arg); |
c7f82d9c AB |
1375 | break; |
1376 | ||
1377 | case FBIOGETCMAP: | |
1378 | case FBIOPUTCMAP: | |
a684e7d3 | 1379 | ret = fb_getput_cmap(info, cmd, arg); |
c7f82d9c AB |
1380 | break; |
1381 | ||
1382 | default: | |
1383 | if (fb->fb_compat_ioctl) | |
67a6680d | 1384 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1385 | break; |
1386 | } | |
1da177e4 LT |
1387 | return ret; |
1388 | } | |
1389 | #endif | |
1390 | ||
10eb2659 | 1391 | static int |
1da177e4 LT |
1392 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
1393 | { | |
c47747fd LT |
1394 | struct fb_info *info = file_fb_info(file); |
1395 | struct fb_ops *fb; | |
fc9bbca8 | 1396 | unsigned long mmio_pgoff; |
1da177e4 LT |
1397 | unsigned long start; |
1398 | u32 len; | |
1da177e4 | 1399 | |
c47747fd LT |
1400 | if (!info) |
1401 | return -ENODEV; | |
c47747fd | 1402 | fb = info->fbops; |
1da177e4 LT |
1403 | if (!fb) |
1404 | return -ENODEV; | |
537a1bf0 | 1405 | mutex_lock(&info->mm_lock); |
1da177e4 LT |
1406 | if (fb->fb_mmap) { |
1407 | int res; | |
216d526c | 1408 | res = fb->fb_mmap(info, vma); |
537a1bf0 | 1409 | mutex_unlock(&info->mm_lock); |
1da177e4 LT |
1410 | return res; |
1411 | } | |
1412 | ||
fc9bbca8 LT |
1413 | /* |
1414 | * Ugh. This can be either the frame buffer mapping, or | |
1415 | * if pgoff points past it, the mmio mapping. | |
1416 | */ | |
1da177e4 | 1417 | start = info->fix.smem_start; |
fc9bbca8 LT |
1418 | len = info->fix.smem_len; |
1419 | mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT; | |
1420 | if (vma->vm_pgoff >= mmio_pgoff) { | |
138f296e TV |
1421 | if (info->var.accel_flags) { |
1422 | mutex_unlock(&info->mm_lock); | |
1423 | return -EINVAL; | |
1424 | } | |
1425 | ||
fc9bbca8 | 1426 | vma->vm_pgoff -= mmio_pgoff; |
1da177e4 | 1427 | start = info->fix.mmio_start; |
fc9bbca8 | 1428 | len = info->fix.mmio_len; |
1da177e4 | 1429 | } |
537a1bf0 | 1430 | mutex_unlock(&info->mm_lock); |
fc9bbca8 | 1431 | |
c07fbfd1 | 1432 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
fc9bbca8 LT |
1433 | fb_pgprotect(file, vma, start); |
1434 | ||
1435 | return vm_iomap_memory(vma, start, len); | |
1da177e4 LT |
1436 | } |
1437 | ||
1438 | static int | |
1439 | fb_open(struct inode *inode, struct file *file) | |
a684e7d3 GU |
1440 | __acquires(&info->lock) |
1441 | __releases(&info->lock) | |
1da177e4 LT |
1442 | { |
1443 | int fbidx = iminor(inode); | |
1444 | struct fb_info *info; | |
1445 | int res = 0; | |
1446 | ||
698b3682 LT |
1447 | info = get_fb_info(fbidx); |
1448 | if (!info) { | |
a65e5d78 | 1449 | request_module("fb%d", fbidx); |
698b3682 LT |
1450 | info = get_fb_info(fbidx); |
1451 | if (!info) | |
1452 | return -ENODEV; | |
1453 | } | |
1454 | if (IS_ERR(info)) | |
1455 | return PTR_ERR(info); | |
1456 | ||
3e680aae | 1457 | mutex_lock(&info->lock); |
fc7f687a JC |
1458 | if (!try_module_get(info->fbops->owner)) { |
1459 | res = -ENODEV; | |
1460 | goto out; | |
1461 | } | |
cae8a12f | 1462 | file->private_data = info; |
1da177e4 LT |
1463 | if (info->fbops->fb_open) { |
1464 | res = info->fbops->fb_open(info,1); | |
1465 | if (res) | |
1466 | module_put(info->fbops->owner); | |
1467 | } | |
d847471d IC |
1468 | #ifdef CONFIG_FB_DEFERRED_IO |
1469 | if (info->fbdefio) | |
1470 | fb_deferred_io_open(info, inode, file); | |
1471 | #endif | |
fc7f687a | 1472 | out: |
3e680aae | 1473 | mutex_unlock(&info->lock); |
698b3682 LT |
1474 | if (res) |
1475 | put_fb_info(info); | |
1da177e4 LT |
1476 | return res; |
1477 | } | |
1478 | ||
1479 | static int | |
1480 | fb_release(struct inode *inode, struct file *file) | |
a684e7d3 GU |
1481 | __acquires(&info->lock) |
1482 | __releases(&info->lock) | |
1da177e4 | 1483 | { |
cae8a12f | 1484 | struct fb_info * const info = file->private_data; |
1da177e4 | 1485 | |
3e680aae | 1486 | mutex_lock(&info->lock); |
1da177e4 LT |
1487 | if (info->fbops->fb_release) |
1488 | info->fbops->fb_release(info,1); | |
1489 | module_put(info->fbops->owner); | |
3e680aae | 1490 | mutex_unlock(&info->lock); |
698b3682 | 1491 | put_fb_info(info); |
1da177e4 LT |
1492 | return 0; |
1493 | } | |
1494 | ||
4c99ceda | 1495 | #if defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && !defined(CONFIG_MMU) |
82f42e4c BG |
1496 | unsigned long get_fb_unmapped_area(struct file *filp, |
1497 | unsigned long addr, unsigned long len, | |
1498 | unsigned long pgoff, unsigned long flags) | |
1499 | { | |
1500 | struct fb_info * const info = filp->private_data; | |
1501 | unsigned long fb_size = PAGE_ALIGN(info->fix.smem_len); | |
1502 | ||
1503 | if (pgoff > fb_size || len > fb_size - pgoff) | |
1504 | return -EINVAL; | |
1505 | ||
1506 | return (unsigned long)info->screen_base + pgoff; | |
1507 | } | |
1508 | #endif | |
1509 | ||
0128beee | 1510 | static const struct file_operations fb_fops = { |
1da177e4 LT |
1511 | .owner = THIS_MODULE, |
1512 | .read = fb_read, | |
1513 | .write = fb_write, | |
e5367711 | 1514 | .unlocked_ioctl = fb_ioctl, |
1da177e4 LT |
1515 | #ifdef CONFIG_COMPAT |
1516 | .compat_ioctl = fb_compat_ioctl, | |
1517 | #endif | |
1518 | .mmap = fb_mmap, | |
1519 | .open = fb_open, | |
1520 | .release = fb_release, | |
82f42e4c | 1521 | #if defined(HAVE_ARCH_FB_UNMAPPED_AREA) || \ |
4c99ceda BG |
1522 | (defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && \ |
1523 | !defined(CONFIG_MMU)) | |
1da177e4 LT |
1524 | .get_unmapped_area = get_fb_unmapped_area, |
1525 | #endif | |
5e841b88 PM |
1526 | #ifdef CONFIG_FB_DEFERRED_IO |
1527 | .fsync = fb_deferred_io_fsync, | |
1528 | #endif | |
6038f373 | 1529 | .llseek = default_llseek, |
1da177e4 LT |
1530 | }; |
1531 | ||
9a179176 AD |
1532 | struct class *fb_class; |
1533 | EXPORT_SYMBOL(fb_class); | |
e4c690e0 AV |
1534 | |
1535 | static int fb_check_foreignness(struct fb_info *fi) | |
1536 | { | |
1537 | const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; | |
1538 | ||
1539 | fi->flags &= ~FBINFO_FOREIGN_ENDIAN; | |
1540 | ||
1541 | #ifdef __BIG_ENDIAN | |
1542 | fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; | |
1543 | #else | |
1544 | fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; | |
1545 | #endif /* __BIG_ENDIAN */ | |
1546 | ||
1547 | if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { | |
1548 | pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " | |
1549 | "support this framebuffer\n", fi->fix.id); | |
1550 | return -ENOSYS; | |
1551 | } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { | |
1552 | pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " | |
1553 | "support this framebuffer\n", fi->fix.id); | |
1554 | return -ENOSYS; | |
1555 | } | |
1556 | ||
1557 | return 0; | |
1558 | } | |
1559 | ||
1471ca9a | 1560 | static bool apertures_overlap(struct aperture *gen, struct aperture *hw) |
4410f391 DA |
1561 | { |
1562 | /* is the generic aperture base the same as the HW one */ | |
1471ca9a | 1563 | if (gen->base == hw->base) |
4410f391 DA |
1564 | return true; |
1565 | /* is the generic aperture base inside the hw base->hw base+size */ | |
acd0acb6 | 1566 | if (gen->base > hw->base && gen->base < hw->base + hw->size) |
4410f391 DA |
1567 | return true; |
1568 | return false; | |
1569 | } | |
1471ca9a | 1570 | |
06415c56 MS |
1571 | static bool fb_do_apertures_overlap(struct apertures_struct *gena, |
1572 | struct apertures_struct *hwa) | |
1471ca9a MS |
1573 | { |
1574 | int i, j; | |
1471ca9a MS |
1575 | if (!hwa || !gena) |
1576 | return false; | |
1577 | ||
1578 | for (i = 0; i < hwa->count; ++i) { | |
1579 | struct aperture *h = &hwa->ranges[i]; | |
1580 | for (j = 0; j < gena->count; ++j) { | |
1581 | struct aperture *g = &gena->ranges[j]; | |
1582 | printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n", | |
f4b87dee RD |
1583 | (unsigned long long)g->base, |
1584 | (unsigned long long)g->size, | |
1585 | (unsigned long long)h->base, | |
1586 | (unsigned long long)h->size); | |
1471ca9a MS |
1587 | if (apertures_overlap(g, h)) |
1588 | return true; | |
1589 | } | |
1590 | } | |
1591 | ||
1592 | return false; | |
1593 | } | |
1594 | ||
712f3147 LT |
1595 | static int do_unregister_framebuffer(struct fb_info *fb_info); |
1596 | ||
3b9676e7 | 1597 | #define VGA_FB_PHYS 0xA0000 |
46eeb2c1 CW |
1598 | static int do_remove_conflicting_framebuffers(struct apertures_struct *a, |
1599 | const char *name, bool primary) | |
06415c56 | 1600 | { |
46eeb2c1 | 1601 | int i, ret; |
06415c56 MS |
1602 | |
1603 | /* check all firmware fbs and kick off if the base addr overlaps */ | |
1604 | for (i = 0 ; i < FB_MAX; i++) { | |
3b9676e7 | 1605 | struct apertures_struct *gen_aper; |
06415c56 MS |
1606 | if (!registered_fb[i]) |
1607 | continue; | |
1608 | ||
1609 | if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE)) | |
1610 | continue; | |
1611 | ||
3b9676e7 MS |
1612 | gen_aper = registered_fb[i]->apertures; |
1613 | if (fb_do_apertures_overlap(gen_aper, a) || | |
1614 | (primary && gen_aper && gen_aper->count && | |
1615 | gen_aper->ranges[0].base == VGA_FB_PHYS)) { | |
1616 | ||
13ba0ad4 | 1617 | printk(KERN_INFO "fb: switching to %s from %s\n", |
06415c56 | 1618 | name, registered_fb[i]->fix.id); |
46eeb2c1 CW |
1619 | ret = do_unregister_framebuffer(registered_fb[i]); |
1620 | if (ret) | |
1621 | return ret; | |
06415c56 MS |
1622 | } |
1623 | } | |
46eeb2c1 CW |
1624 | |
1625 | return 0; | |
06415c56 | 1626 | } |
1da177e4 | 1627 | |
c3c296b0 DV |
1628 | static bool lockless_register_fb; |
1629 | module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); | |
1630 | MODULE_PARM_DESC(lockless_register_fb, | |
1631 | "Lockless framebuffer registration for debugging [default=off]"); | |
1632 | ||
712f3147 | 1633 | static int do_register_framebuffer(struct fb_info *fb_info) |
1da177e4 | 1634 | { |
46eeb2c1 | 1635 | int i, ret; |
1da177e4 | 1636 | struct fb_event event; |
96fe6a21 | 1637 | struct fb_videomode mode; |
1da177e4 | 1638 | |
e4c690e0 AV |
1639 | if (fb_check_foreignness(fb_info)) |
1640 | return -ENOSYS; | |
1641 | ||
46eeb2c1 CW |
1642 | ret = do_remove_conflicting_framebuffers(fb_info->apertures, |
1643 | fb_info->fix.id, | |
1644 | fb_is_primary_device(fb_info)); | |
1645 | if (ret) | |
1646 | return ret; | |
4410f391 | 1647 | |
c590cece BP |
1648 | if (num_registered_fb == FB_MAX) |
1649 | return -ENXIO; | |
1650 | ||
1da177e4 LT |
1651 | num_registered_fb++; |
1652 | for (i = 0 ; i < FB_MAX; i++) | |
1653 | if (!registered_fb[i]) | |
1654 | break; | |
1655 | fb_info->node = i; | |
698b3682 | 1656 | atomic_set(&fb_info->count, 1); |
6c96895e LT |
1657 | mutex_init(&fb_info->lock); |
1658 | mutex_init(&fb_info->mm_lock); | |
1da177e4 | 1659 | |
77997aaa GKH |
1660 | fb_info->dev = device_create(fb_class, fb_info->device, |
1661 | MKDEV(FB_MAJOR, i), NULL, "fb%d", i); | |
78cde088 | 1662 | if (IS_ERR(fb_info->dev)) { |
1da177e4 | 1663 | /* Not fatal */ |
78cde088 GKH |
1664 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1665 | fb_info->dev = NULL; | |
1da177e4 | 1666 | } else |
78cde088 | 1667 | fb_init_device(fb_info); |
1da177e4 LT |
1668 | |
1669 | if (fb_info->pixmap.addr == NULL) { | |
1670 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1671 | if (fb_info->pixmap.addr) { | |
1672 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1673 | fb_info->pixmap.buf_align = 1; | |
1674 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1675 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1676 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1677 | } | |
1678 | } | |
1679 | fb_info->pixmap.offset = 0; | |
1680 | ||
bf26ad72 AD |
1681 | if (!fb_info->pixmap.blit_x) |
1682 | fb_info->pixmap.blit_x = ~(u32)0; | |
1683 | ||
1684 | if (!fb_info->pixmap.blit_y) | |
1685 | fb_info->pixmap.blit_y = ~(u32)0; | |
1686 | ||
96fe6a21 | 1687 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1688 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1689 | |
3cf2667b JB |
1690 | if (fb_info->skip_vt_switch) |
1691 | pm_vt_switch_required(fb_info->dev, false); | |
1692 | else | |
1693 | pm_vt_switch_required(fb_info->dev, true); | |
1694 | ||
96fe6a21 AD |
1695 | fb_var_to_videomode(&mode, &fb_info->var); |
1696 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1697 | registered_fb[i] = fb_info; |
1698 | ||
1da177e4 | 1699 | event.info = fb_info; |
c3c296b0 DV |
1700 | if (!lockless_register_fb) |
1701 | console_lock(); | |
3a41c5db | 1702 | if (!lock_fb_info(fb_info)) { |
c3c296b0 DV |
1703 | if (!lockless_register_fb) |
1704 | console_unlock(); | |
3a41c5db GZ |
1705 | return -ENODEV; |
1706 | } | |
1707 | ||
256154fb | 1708 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
513adb58 | 1709 | unlock_fb_info(fb_info); |
c3c296b0 DV |
1710 | if (!lockless_register_fb) |
1711 | console_unlock(); | |
1da177e4 LT |
1712 | return 0; |
1713 | } | |
1714 | ||
712f3147 | 1715 | static int do_unregister_framebuffer(struct fb_info *fb_info) |
1da177e4 | 1716 | { |
e614b18d | 1717 | struct fb_event event; |
cfafca80 | 1718 | int i, ret = 0; |
1da177e4 LT |
1719 | |
1720 | i = fb_info->node; | |
c590cece | 1721 | if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info) |
712f3147 | 1722 | return -EINVAL; |
513adb58 | 1723 | |
e93a9a86 | 1724 | console_lock(); |
3a41c5db GZ |
1725 | if (!lock_fb_info(fb_info)) { |
1726 | console_unlock(); | |
1727 | return -ENODEV; | |
1728 | } | |
1729 | ||
cfafca80 JB |
1730 | event.info = fb_info; |
1731 | ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); | |
513adb58 | 1732 | unlock_fb_info(fb_info); |
3a41c5db | 1733 | console_unlock(); |
cfafca80 | 1734 | |
712f3147 LT |
1735 | if (ret) |
1736 | return -EINVAL; | |
1da177e4 | 1737 | |
3cf2667b JB |
1738 | pm_vt_switch_unregister(fb_info->dev); |
1739 | ||
ce880cb8 | 1740 | unlink_framebuffer(fb_info); |
e614b18d AD |
1741 | if (fb_info->pixmap.addr && |
1742 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1da177e4 LT |
1743 | kfree(fb_info->pixmap.addr); |
1744 | fb_destroy_modelist(&fb_info->modelist); | |
698b3682 | 1745 | registered_fb[i] = NULL; |
1da177e4 | 1746 | num_registered_fb--; |
78cde088 | 1747 | fb_cleanup_device(fb_info); |
e614b18d | 1748 | event.info = fb_info; |
e93a9a86 | 1749 | console_lock(); |
256154fb | 1750 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
e93a9a86 | 1751 | console_unlock(); |
4410f391 DA |
1752 | |
1753 | /* this may free fb info */ | |
698b3682 | 1754 | put_fb_info(fb_info); |
712f3147 LT |
1755 | return 0; |
1756 | } | |
1757 | ||
ce880cb8 KS |
1758 | int unlink_framebuffer(struct fb_info *fb_info) |
1759 | { | |
1760 | int i; | |
1761 | ||
1762 | i = fb_info->node; | |
1763 | if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info) | |
1764 | return -EINVAL; | |
1765 | ||
1766 | if (fb_info->dev) { | |
1767 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); | |
1768 | fb_info->dev = NULL; | |
1769 | } | |
1770 | return 0; | |
1771 | } | |
1772 | EXPORT_SYMBOL(unlink_framebuffer); | |
1773 | ||
46eeb2c1 CW |
1774 | int remove_conflicting_framebuffers(struct apertures_struct *a, |
1775 | const char *name, bool primary) | |
712f3147 | 1776 | { |
46eeb2c1 CW |
1777 | int ret; |
1778 | ||
712f3147 | 1779 | mutex_lock(®istration_lock); |
46eeb2c1 | 1780 | ret = do_remove_conflicting_framebuffers(a, name, primary); |
698b3682 | 1781 | mutex_unlock(®istration_lock); |
46eeb2c1 CW |
1782 | |
1783 | return ret; | |
712f3147 LT |
1784 | } |
1785 | EXPORT_SYMBOL(remove_conflicting_framebuffers); | |
1786 | ||
1787 | /** | |
1788 | * register_framebuffer - registers a frame buffer device | |
1789 | * @fb_info: frame buffer info structure | |
1790 | * | |
1791 | * Registers a frame buffer device @fb_info. | |
1792 | * | |
1793 | * Returns negative errno on error, or zero for success. | |
1794 | * | |
1795 | */ | |
1796 | int | |
1797 | register_framebuffer(struct fb_info *fb_info) | |
1798 | { | |
1799 | int ret; | |
1800 | ||
1801 | mutex_lock(®istration_lock); | |
1802 | ret = do_register_framebuffer(fb_info); | |
1803 | mutex_unlock(®istration_lock); | |
1804 | ||
1805 | return ret; | |
1806 | } | |
9c29fba1 | 1807 | EXPORT_SYMBOL(register_framebuffer); |
712f3147 LT |
1808 | |
1809 | /** | |
1810 | * unregister_framebuffer - releases a frame buffer device | |
1811 | * @fb_info: frame buffer info structure | |
1812 | * | |
1813 | * Unregisters a frame buffer device @fb_info. | |
1814 | * | |
1815 | * Returns negative errno on error, or zero for success. | |
1816 | * | |
1817 | * This function will also notify the framebuffer console | |
1818 | * to release the driver. | |
1819 | * | |
1820 | * This is meant to be called within a driver's module_exit() | |
1821 | * function. If this is called outside module_exit(), ensure | |
1822 | * that the driver implements fb_open() and fb_release() to | |
1823 | * check that no processes are using the device. | |
1824 | */ | |
1825 | int | |
1826 | unregister_framebuffer(struct fb_info *fb_info) | |
1827 | { | |
1828 | int ret; | |
1829 | ||
1830 | mutex_lock(®istration_lock); | |
1831 | ret = do_unregister_framebuffer(fb_info); | |
1832 | mutex_unlock(®istration_lock); | |
1833 | ||
cfafca80 | 1834 | return ret; |
1da177e4 | 1835 | } |
9c29fba1 | 1836 | EXPORT_SYMBOL(unregister_framebuffer); |
1da177e4 | 1837 | |
1da177e4 LT |
1838 | /** |
1839 | * fb_set_suspend - low level driver signals suspend | |
1840 | * @info: framebuffer affected | |
1841 | * @state: 0 = resuming, !=0 = suspending | |
1842 | * | |
1843 | * This is meant to be used by low level drivers to | |
1844 | * signal suspend/resume to the core & clients. | |
1845 | * It must be called with the console semaphore held | |
1846 | */ | |
1847 | void fb_set_suspend(struct fb_info *info, int state) | |
1848 | { | |
1849 | struct fb_event event; | |
1850 | ||
1851 | event.info = info; | |
1852 | if (state) { | |
256154fb | 1853 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
1da177e4 LT |
1854 | info->state = FBINFO_STATE_SUSPENDED; |
1855 | } else { | |
1856 | info->state = FBINFO_STATE_RUNNING; | |
256154fb | 1857 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
1da177e4 LT |
1858 | } |
1859 | } | |
9c29fba1 | 1860 | EXPORT_SYMBOL(fb_set_suspend); |
1da177e4 LT |
1861 | |
1862 | /** | |
1863 | * fbmem_init - init frame buffer subsystem | |
1864 | * | |
1865 | * Initialize the frame buffer subsystem. | |
1866 | * | |
1867 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1868 | * | |
1869 | */ | |
1870 | ||
1871 | static int __init | |
1872 | fbmem_init(void) | |
1873 | { | |
524edf38 AK |
1874 | int ret; |
1875 | ||
1876 | if (!proc_create("fb", 0, NULL, &fb_proc_fops)) | |
1877 | return -ENOMEM; | |
1da177e4 | 1878 | |
524edf38 AK |
1879 | ret = register_chrdev(FB_MAJOR, "fb", &fb_fops); |
1880 | if (ret) { | |
1da177e4 | 1881 | printk("unable to get major %d for fb devs\n", FB_MAJOR); |
524edf38 AK |
1882 | goto err_chrdev; |
1883 | } | |
1da177e4 | 1884 | |
56b22935 | 1885 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 | 1886 | if (IS_ERR(fb_class)) { |
524edf38 AK |
1887 | ret = PTR_ERR(fb_class); |
1888 | pr_warn("Unable to create fb class; errno = %d\n", ret); | |
1da177e4 | 1889 | fb_class = NULL; |
524edf38 | 1890 | goto err_class; |
1da177e4 LT |
1891 | } |
1892 | return 0; | |
524edf38 AK |
1893 | |
1894 | err_class: | |
1895 | unregister_chrdev(FB_MAJOR, "fb"); | |
1896 | err_chrdev: | |
1897 | remove_proc_entry("fb", NULL); | |
1898 | return ret; | |
1da177e4 LT |
1899 | } |
1900 | ||
1901 | #ifdef MODULE | |
1902 | module_init(fbmem_init); | |
1903 | static void __exit | |
1904 | fbmem_exit(void) | |
1905 | { | |
c43f89c2 | 1906 | remove_proc_entry("fb", NULL); |
56b22935 | 1907 | class_destroy(fb_class); |
5a340cce | 1908 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1909 | } |
1910 | ||
1911 | module_exit(fbmem_exit); | |
1912 | MODULE_LICENSE("GPL"); | |
1913 | MODULE_DESCRIPTION("Framebuffer base"); | |
1914 | #else | |
1915 | subsys_initcall(fbmem_init); | |
1916 | #endif | |
1917 | ||
1918 | int fb_new_modelist(struct fb_info *info) | |
1919 | { | |
1920 | struct fb_event event; | |
1921 | struct fb_var_screeninfo var = info->var; | |
1922 | struct list_head *pos, *n; | |
1923 | struct fb_modelist *modelist; | |
1924 | struct fb_videomode *m, mode; | |
1925 | int err = 1; | |
1926 | ||
1927 | list_for_each_safe(pos, n, &info->modelist) { | |
1928 | modelist = list_entry(pos, struct fb_modelist, list); | |
1929 | m = &modelist->mode; | |
1930 | fb_videomode_to_var(&var, m); | |
1931 | var.activate = FB_ACTIVATE_TEST; | |
1932 | err = fb_set_var(info, &var); | |
1933 | fb_var_to_videomode(&mode, &var); | |
1934 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1935 | list_del(pos); | |
1936 | kfree(pos); | |
1937 | } | |
1938 | } | |
1939 | ||
1940 | err = 1; | |
1941 | ||
1942 | if (!list_empty(&info->modelist)) { | |
1943 | event.info = info; | |
256154fb | 1944 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
1da177e4 LT |
1945 | } |
1946 | ||
1947 | return err; | |
1948 | } | |
1949 | ||
1da177e4 | 1950 | MODULE_LICENSE("GPL"); |