/* * 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> #include <linux/compat.h> #include <linux/types.h> #include <linux/errno.h> #include <linux/smp_lock.h> #include <linux/kernel.h> #include <linux/major.h> #include <linux/slab.h> #include <linux/mm.h> #include <linux/mman.h> #include <linux/vt.h> #include <linux/init.h> #include <linux/linux_logo.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/console.h> #include <linux/kmod.h> #include <linux/err.h> #include <linux/device.h> #include <linux/efi.h> #include <linux/fb.h> #include <asm/fb.h> /* * Frame buffer device initialization and setup routines */ #define FBPIXMAPSIZE (1024 * 8) struct fb_info *registered_fb[FB_MAX] __read_mostly; int num_registered_fb __read_mostly; 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); /* * Helpers */ int fb_get_color_depth(struct fb_var_screeninfo *var, struct fb_fix_screeninfo *fix) { 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; } EXPORT_SYMBOL(fb_get_color_depth); /* * Data padding functions. */ void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) { __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); } EXPORT_SYMBOL(fb_pad_aligned_buffer); void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, u32 shift_high, u32 shift_low, u32 mod) { 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; } } EXPORT_SYMBOL(fb_pad_unaligned_buffer); /* * 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) { static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; 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; for (i = 32; i < 32 + logo->clutsize; i++) 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) { int i, j, k; const u8 *src = logo->data; u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; u8 fg = 1, d; switch (fb_get_color_depth(&info->var, &info->fix)) { case 1: fg = 1; break; case 2: fg = 3; break; default: fg = 7; break; } if (info->fix.visual == FB_VISUAL_MONO01 || info->fix.visual == FB_VISUAL_MONO10) fg = ~((u8) (0xfff << info->var.green.length)); 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; } fb_logo __read_mostly; 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) { int i, j, h = height - 1; for (i = 0; i < height; i++) for (j = 0; j < width; j++) out[height * j + h - i] = *in++; } 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); image->dx = info->var.xres - image->width - image->dx; image->dy = info->var.yres - image->height - image->dy; } 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; tmp = image->dy; image->dy = image->dx; image->dx = info->var.xres - image->width - tmp; } else if (rotate == FB_ROTATE_CCW) { fb_rotate_logo_ccw(image->data, dst, image->width, image->height); tmp = image->width; image->width = image->height; image->height = tmp; tmp = image->dx; image->dx = image->dy; image->dy = info->var.yres - image->height - tmp; } image->data = dst; } static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, int rotate, unsigned int num) { unsigned int x; if (rotate == FB_ROTATE_UR) { for (x = 0; x < num && image->dx + image->width <= info->var.xres; x++) { info->fbops->fb_imageblit(info, image); image->dx += image->width + 8; } } else if (rotate == FB_ROTATE_UD) { for (x = 0; x < num && image->dx >= 0; x++) { info->fbops->fb_imageblit(info, image); image->dx -= image->width + 8; } } else if (rotate == FB_ROTATE_CW) { for (x = 0; x < num && image->dy + image->height <= info->var.yres; x++) { info->fbops->fb_imageblit(info, image); image->dy += image->height + 8; } } else if (rotate == FB_ROTATE_CCW) { for (x = 0; x < num && image->dy >= 0; x++) { info->fbops->fb_imageblit(info, image); image->dy -= image->height + 8; } } } static int fb_show_logo_line(struct fb_info *info, int rotate, const struct linux_logo *logo, int y, unsigned int n) { u32 *palette = NULL, *saved_pseudo_palette = NULL; unsigned char *logo_new = NULL, *logo_rotate = NULL; struct fb_image image; /* Return if the frame buffer is not mapped or suspended */ if (logo == NULL || info->state != FBINFO_STATE_RUNNING || info->flags & FBINFO_MODULE) return 0; image.depth = 8; image.data = logo->data; if (fb_logo.needs_cmapreset) fb_set_logocmap(info, logo); if (fb_logo.needs_truepalette || fb_logo.needs_directpalette) { palette = kmalloc(256 * 4, GFP_KERNEL); if (palette == NULL) return 0; if (fb_logo.needs_truepalette) fb_set_logo_truepalette(info, logo, palette); else fb_set_logo_directpalette(info, logo, palette); saved_pseudo_palette = info->pseudo_palette; info->pseudo_palette = palette; } if (fb_logo.depth <= 4) { logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL); if (logo_new == NULL) { kfree(palette); if (saved_pseudo_palette) info->pseudo_palette = saved_pseudo_palette; return 0; } image.data = logo_new; fb_set_logo(info, logo, logo_new, fb_logo.depth); } image.dx = 0; image.dy = y; image.width = logo->width; image.height = logo->height; if (rotate) { logo_rotate = kmalloc(logo->width * logo->height, GFP_KERNEL); if (logo_rotate) fb_rotate_logo(info, logo_rotate, &image, rotate); } fb_do_show_logo(info, &image, rotate, n); kfree(palette); if (saved_pseudo_palette != NULL) info->pseudo_palette = saved_pseudo_palette; kfree(logo_new); kfree(logo_rotate); return logo->height; } #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++) { if (fb_logo_ex[i].logo->type != fb_logo.logo->type) { fb_logo_ex[i].logo = NULL; continue; } 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; 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; } } return fb_prepare_extra_logos(info, fb_logo.logo->height, yres); } int fb_show_logo(struct fb_info *info, int rotate) { 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; } #else int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } int fb_show_logo(struct fb_info *info, int rotate) { return 0; } #endif /* CONFIG_LOGO */ static void *fb_seq_start(struct seq_file *m, loff_t *pos) { 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) { } 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, }; static ssize_t fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { unsigned long p = *ppos; struct inode *inode = file->f_path.dentry->d_inode; int fbidx = iminor(inode); struct fb_info *info = registered_fb[fbidx]; u32 *buffer, *dst; u32 __iomem *src; int c, i, cnt = 0, err = 0; unsigned long total_size; if (!info || ! info->screen_base) return -ENODEV; if (info->state != FBINFO_STATE_RUNNING) return -EPERM; if (info->fbops->fb_read) return info->fbops->fb_read(info, buf, count, ppos); total_size = info->screen_size; if (total_size == 0) total_size = info->fix.smem_len; if (p >= total_size) return 0; if (count >= total_size) count = total_size; if (count + p > total_size) count = total_size - p; buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, GFP_KERNEL); if (!buffer) return -ENOMEM; src = (u32 __iomem *) (info->screen_base + p); if (info->fbops->fb_sync) info->fbops->fb_sync(info); while (count) { c = (count > PAGE_SIZE) ? PAGE_SIZE : count; dst = buffer; for (i = c >> 2; i--; ) *dst++ = fb_readl(src++); if (c & 3) { u8 *dst8 = (u8 *) dst; u8 __iomem *src8 = (u8 __iomem *) src; for (i = c & 3; i--;) *dst8++ = fb_readb(src8++); src = (u32 __iomem *) src8; } if (copy_to_user(buf, buffer, c)) { err = -EFAULT; break; } *ppos += c; buf += c; cnt += c; count -= c; } kfree(buffer); 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; struct inode *inode = file->f_path.dentry->d_inode; int fbidx = iminor(inode); struct fb_info *info = registered_fb[fbidx]; u32 *buffer, *src; u32 __iomem *dst; int c, i, cnt = 0, err = 0; unsigned long total_size; if (!info || !info->screen_base) return -ENODEV; if (info->state != FBINFO_STATE_RUNNING) return -EPERM; if (info->fbops->fb_write) return info->fbops->fb_write(info, buf, count, ppos); total_size = info->screen_size; if (total_size == 0) total_size = info->fix.smem_len; if (p > total_size) return -EFBIG; if (count > total_size) { err = -EFBIG; count = total_size; } if (count + p > total_size) { if (!err) err = -ENOSPC; count = total_size - p; } buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, GFP_KERNEL); if (!buffer) return -ENOMEM; dst = (u32 __iomem *) (info->screen_base + p); if (info->fbops->fb_sync) info->fbops->fb_sync(info); while (count) { c = (count > PAGE_SIZE) ? PAGE_SIZE : count; src = buffer; if (copy_from_user(src, buf, c)) { err = -EFAULT; break; } for (i = c >> 2; i--; ) fb_writel(*src++, dst++); if (c & 3) { u8 *src8 = (u8 *) src; u8 __iomem *dst8 = (u8 __iomem *) dst; for (i = c & 3; i--; ) fb_writeb(*src8++, dst8++); dst = (u32 __iomem *) dst8; } *ppos += c; buf += c; cnt += c; count -= c; } kfree(buffer); return (cnt) ? cnt : err; } int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) { struct fb_fix_screeninfo *fix = &info->fix; unsigned int yres = info->var.yres; int err = 0; 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; if (err || !info->fbops->fb_pan_display || var->yoffset + yres > info->var.yres_virtual || var->xoffset + info->var.xres > info->var.xres_virtual) return -EINVAL; if ((err = info->fbops->fb_pan_display(var, info))) return err; 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; } 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 = ∩︀ 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; } int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) { int flags = info->flags; int ret = 0; 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; ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); } if (!ret) fb_delete_videomode(&mode1, &info->modelist); ret = (ret) ? -EINVAL : 0; goto done; } if ((var->activate & FB_ACTIVATE_FORCE) || memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { u32 activate = var->activate; if (!info->fbops->fb_check_var) { *var = info->var; goto done; } ret = info->fbops->fb_check_var(var, info); if (ret) goto done; if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { struct fb_videomode mode; if (info->fbops->fb_get_caps) { ret = fb_check_caps(info, var, activate); if (ret) goto done; } info->var = *var; if (info->fbops->fb_set_par) info->fbops->fb_set_par(info); 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)) ret = fb_add_videomode(&mode, &info->modelist); if (!ret && (flags & FBINFO_MISC_USEREVENT)) { struct fb_event event; int evnt = (activate & FB_ACTIVATE_ALL) ? FB_EVENT_MODE_CHANGE_ALL : FB_EVENT_MODE_CHANGE; info->flags &= ~FBINFO_MISC_USEREVENT; event.info = info; event.data = &mode; fb_notifier_call_chain(evnt, &event); } } } done: return ret; } int fb_blank(struct fb_info *info, int blank) { int ret = -EINVAL; if (blank > FB_BLANK_POWERDOWN) blank = FB_BLANK_POWERDOWN; if (info->fbops->fb_blank) ret = info->fbops->fb_blank(blank, info); if (!ret) { struct fb_event event; event.info = info; event.data = ␣ fb_notifier_call_chain(FB_EVENT_BLANK, &event); } return ret; } static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) { struct fb_ops *fb; struct fb_var_screeninfo var; struct fb_fix_screeninfo fix; struct fb_con2fbmap con2fb; struct fb_cmap cmap_from; struct fb_cmap_user cmap; struct fb_event event; void __user *argp = (void __user *)arg; long ret = 0; switch (cmd) { case FBIOGET_VSCREENINFO: if (!lock_fb_info(info)) return -ENODEV; var = info->var; unlock_fb_info(info); ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0; break; case FBIOPUT_VSCREENINFO: if (copy_from_user(&var, argp, sizeof(var))) return -EFAULT; if (!lock_fb_info(info)) return -ENODEV; acquire_console_sem(); info->flags |= FBINFO_MISC_USEREVENT; ret = fb_set_var(info, &var); info->flags &= ~FBINFO_MISC_USEREVENT; release_console_sem(); unlock_fb_info(info); if (!ret && copy_to_user(argp, &var, sizeof(var))) ret = -EFAULT; break; case FBIOGET_FSCREENINFO: if (!lock_fb_info(info)) return -ENODEV; fix = info->fix; unlock_fb_info(info); ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0; break; case FBIOPUTCMAP: if (copy_from_user(&cmap, argp, sizeof(cmap))) return -EFAULT; ret = fb_set_user_cmap(&cmap, info); break; case FBIOGETCMAP: if (copy_from_user(&cmap, argp, sizeof(cmap))) 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); break; case FBIOPAN_DISPLAY: if (copy_from_user(&var, argp, sizeof(var))) return -EFAULT; if (!lock_fb_info(info)) return -ENODEV; acquire_console_sem(); ret = fb_pan_display(info, &var); release_console_sem(); unlock_fb_info(info); if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) return -EFAULT; break; case FBIO_CURSOR: ret = -EINVAL; break; case FBIOGET_CON2FBMAP: if (copy_from_user(&con2fb, argp, sizeof(con2fb))) return -EFAULT; if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) return -EINVAL; con2fb.framebuffer = -1; event.data = &con2fb; if (!lock_fb_info(info)) return -ENODEV; event.info = info; fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); unlock_fb_info(info); ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; break; case FBIOPUT_CON2FBMAP: 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; if (!registered_fb[con2fb.framebuffer]) request_module("fb%d", con2fb.framebuffer); if (!registered_fb[con2fb.framebuffer]) { ret = -EINVAL; break; } event.data = &con2fb; if (!lock_fb_info(info)) return -ENODEV; event.info = info; ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event); unlock_fb_info(info); break; case FBIOBLANK: if (!lock_fb_info(info)) return -ENODEV; acquire_console_sem(); info->flags |= FBINFO_MISC_USEREVENT; ret = fb_blank(info, arg); info->flags &= ~FBINFO_MISC_USEREVENT; release_console_sem(); unlock_fb_info(info); break; default: if (!lock_fb_info(info)) return -ENODEV; fb = info->fbops; if (fb->fb_ioctl) ret = fb->fb_ioctl(info, cmd, arg); else ret = -ENOTTY; unlock_fb_info(info); } return ret; } static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct inode *inode = file->f_path.dentry->d_inode; int fbidx = iminor(inode); struct fb_info *info = registered_fb[fbidx]; return do_fb_ioctl(info, cmd, arg); } #ifdef CONFIG_COMPAT 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; }; static int fb_getput_cmap(struct fb_info *info, unsigned int cmd, unsigned long arg) { 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; err = do_fb_ioctl(info, cmd, (unsigned long) cmap); 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; } static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, unsigned long arg) { 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); err = do_fb_ioctl(info, cmd, (unsigned long) &fix); set_fs(old_fs); if (!err) err = do_fscreeninfo_to_user(&fix, fix32); return err; } static long fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct inode *inode = file->f_path.dentry->d_inode; int fbidx = iminor(inode); struct fb_info *info = registered_fb[fbidx]; struct fb_ops *fb = info->fbops; long ret = -ENOIOCTLCMD; switch(cmd) { case FBIOGET_VSCREENINFO: case FBIOPUT_VSCREENINFO: case FBIOPAN_DISPLAY: case FBIOGET_CON2FBMAP: case FBIOPUT_CON2FBMAP: arg = (unsigned long) compat_ptr(arg); case FBIOBLANK: ret = do_fb_ioctl(info, cmd, arg); break; case FBIOGET_FSCREENINFO: ret = fb_get_fscreeninfo(info, cmd, arg); break; case FBIOGETCMAP: case FBIOPUTCMAP: ret = fb_getput_cmap(info, cmd, arg); break; default: if (fb->fb_compat_ioctl) ret = fb->fb_compat_ioctl(info, cmd, arg); break; } return ret; } #endif static int fb_mmap(struct file *file, struct vm_area_struct * vma) __acquires(&info->lock) __releases(&info->lock) { int fbidx = iminor(file->f_path.dentry->d_inode); struct fb_info *info = registered_fb[fbidx]; struct fb_ops *fb = info->fbops; unsigned long off; unsigned long start; u32 len; if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) return -EINVAL; off = vma->vm_pgoff << PAGE_SHIFT; if (!fb) return -ENODEV; if (fb->fb_mmap) { int res; mutex_lock(&info->lock); res = fb->fb_mmap(info, vma); mutex_unlock(&info->lock); return res; } mutex_lock(&info->lock); /* frame buffer memory */ start = info->fix.smem_start; len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); if (off >= len) { /* memory mapped io */ off -= len; if (info->var.accel_flags) { mutex_unlock(&info->lock); return -EINVAL; } start = info->fix.mmio_start; len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); } mutex_unlock(&info->lock); start &= PAGE_MASK; if ((vma->vm_end - vma->vm_start + off) > len) return -EINVAL; off += start; vma->vm_pgoff = off >> PAGE_SHIFT; /* This is an IO map - tell maydump to skip this VMA */ vma->vm_flags |= VM_IO | VM_RESERVED; fb_pgprotect(file, vma, off); if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, vma->vm_end - vma->vm_start, vma->vm_page_prot)) return -EAGAIN; return 0; } static int fb_open(struct inode *inode, struct file *file) __acquires(&info->lock) __releases(&info->lock) { int fbidx = iminor(inode); struct fb_info *info; int res = 0; if (fbidx >= FB_MAX) return -ENODEV; info = registered_fb[fbidx]; if (!info) request_module("fb%d", fbidx); info = registered_fb[fbidx]; if (!info) return -ENODEV; mutex_lock(&info->lock); if (!try_module_get(info->fbops->owner)) { res = -ENODEV; goto out; } file->private_data = info; if (info->fbops->fb_open) { res = info->fbops->fb_open(info,1); if (res) module_put(info->fbops->owner); } #ifdef CONFIG_FB_DEFERRED_IO if (info->fbdefio) fb_deferred_io_open(info, inode, file); #endif out: mutex_unlock(&info->lock); return res; } static int fb_release(struct inode *inode, struct file *file) __acquires(&info->lock) __releases(&info->lock) { struct fb_info * const info = file->private_data; mutex_lock(&info->lock); if (info->fbops->fb_release) info->fbops->fb_release(info,1); module_put(info->fbops->owner); mutex_unlock(&info->lock); return 0; } static const struct file_operations fb_fops = { .owner = THIS_MODULE, .read = fb_read, .write = fb_write, .unlocked_ioctl = fb_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = fb_compat_ioctl, #endif .mmap = fb_mmap, .open = fb_open, .release = fb_release, #ifdef HAVE_ARCH_FB_UNMAPPED_AREA .get_unmapped_area = get_fb_unmapped_area, #endif #ifdef CONFIG_FB_DEFERRED_IO .fsync = fb_deferred_io_fsync, #endif }; struct class *fb_class; EXPORT_SYMBOL(fb_class); static int fb_check_foreignness(struct fb_info *fi) { const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; fi->flags &= ~FBINFO_FOREIGN_ENDIAN; #ifdef __BIG_ENDIAN fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; #else fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; #endif /* __BIG_ENDIAN */ if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " "support this framebuffer\n", fi->fix.id); return -ENOSYS; } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " "support this framebuffer\n", fi->fix.id); return -ENOSYS; } return 0; } static bool fb_do_apertures_overlap(struct fb_info *gen, struct fb_info *hw) { /* is the generic aperture base the same as the HW one */ if (gen->aperture_base == hw->aperture_base) return true; /* is the generic aperture base inside the hw base->hw base+size */ if (gen->aperture_base > hw->aperture_base && gen->aperture_base <= hw->aperture_base + hw->aperture_size) return true; return false; } /** * register_framebuffer - registers a frame buffer device * @fb_info: frame buffer info structure * * Registers a frame buffer device @fb_info. * * Returns negative errno on error, or zero for success. * */ int register_framebuffer(struct fb_info *fb_info) { int i; struct fb_event event; struct fb_videomode mode; if (num_registered_fb == FB_MAX) return -ENXIO; if (fb_check_foreignness(fb_info)) return -ENOSYS; /* check all firmware fbs and kick off if the base addr overlaps */ for (i = 0 ; i < FB_MAX; i++) { if (!registered_fb[i]) continue; if (registered_fb[i]->flags & FBINFO_MISC_FIRMWARE) { if (fb_do_apertures_overlap(registered_fb[i], fb_info)) { printk(KERN_ERR "fb: conflicting fb hw usage " "%s vs %s - removing generic driver\n", fb_info->fix.id, registered_fb[i]->fix.id); unregister_framebuffer(registered_fb[i]); break; } } } num_registered_fb++; for (i = 0 ; i < FB_MAX; i++) if (!registered_fb[i]) break; fb_info->node = i; mutex_init(&fb_info->lock); fb_info->dev = device_create(fb_class, fb_info->device, MKDEV(FB_MAJOR, i), NULL, "fb%d", i); if (IS_ERR(fb_info->dev)) { /* Not fatal */ printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); fb_info->dev = NULL; } else fb_init_device(fb_info); if (fb_info->pixmap.addr == NULL) { fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); if (fb_info->pixmap.addr) { fb_info->pixmap.size = FBPIXMAPSIZE; fb_info->pixmap.buf_align = 1; fb_info->pixmap.scan_align = 1; fb_info->pixmap.access_align = 32; fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; } } fb_info->pixmap.offset = 0; if (!fb_info->pixmap.blit_x) fb_info->pixmap.blit_x = ~(u32)0; if (!fb_info->pixmap.blit_y) fb_info->pixmap.blit_y = ~(u32)0; if (!fb_info->modelist.prev || !fb_info->modelist.next) INIT_LIST_HEAD(&fb_info->modelist); fb_var_to_videomode(&mode, &fb_info->var); fb_add_videomode(&mode, &fb_info->modelist); registered_fb[i] = fb_info; event.info = fb_info; if (!lock_fb_info(fb_info)) return -ENODEV; fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); unlock_fb_info(fb_info); return 0; } /** * unregister_framebuffer - releases a frame buffer device * @fb_info: frame buffer info structure * * Unregisters a frame buffer device @fb_info. * * Returns negative errno on error, or zero for success. * * This function will also notify the framebuffer console * to release the driver. * * This is meant to be called within a driver's module_exit() * function. If this is called outside module_exit(), ensure * that the driver implements fb_open() and fb_release() to * check that no processes are using the device. */ int unregister_framebuffer(struct fb_info *fb_info) { struct fb_event event; int i, ret = 0; i = fb_info->node; if (!registered_fb[i]) { ret = -EINVAL; goto done; } if (!lock_fb_info(fb_info)) return -ENODEV; event.info = fb_info; ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); unlock_fb_info(fb_info); if (ret) { ret = -EINVAL; goto done; } if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) kfree(fb_info->pixmap.addr); fb_destroy_modelist(&fb_info->modelist); registered_fb[i]=NULL; num_registered_fb--; fb_cleanup_device(fb_info); device_destroy(fb_class, MKDEV(FB_MAJOR, i)); event.info = fb_info; fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); /* this may free fb info */ if (fb_info->fbops->fb_destroy) fb_info->fbops->fb_destroy(fb_info); done: return ret; } /** * fb_set_suspend - low level driver signals suspend * @info: framebuffer affected * @state: 0 = resuming, !=0 = suspending * * This is meant to be used by low level drivers to * signal suspend/resume to the core & clients. * It must be called with the console semaphore held */ void fb_set_suspend(struct fb_info *info, int state) { struct fb_event event; if (!lock_fb_info(info)) return; event.info = info; if (state) { fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); info->state = FBINFO_STATE_SUSPENDED; } else { info->state = FBINFO_STATE_RUNNING; fb_notifier_call_chain(FB_EVENT_RESUME, &event); } unlock_fb_info(info); } /** * fbmem_init - init frame buffer subsystem * * Initialize the frame buffer subsystem. * * NOTE: This function is _only_ to be called by drivers/char/mem.c. * */ static int __init fbmem_init(void) { proc_create("fb", 0, NULL, &fb_proc_fops); if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) printk("unable to get major %d for fb devs\n", FB_MAJOR); fb_class = class_create(THIS_MODULE, "graphics"); if (IS_ERR(fb_class)) { printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); fb_class = NULL; } return 0; } #ifdef MODULE module_init(fbmem_init); static void __exit fbmem_exit(void) { remove_proc_entry("fb", NULL); class_destroy(fb_class); unregister_chrdev(FB_MAJOR, "fb"); } module_exit(fbmem_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Framebuffer base"); #else subsys_initcall(fbmem_init); #endif int fb_new_modelist(struct fb_info *info) { struct fb_event event; struct fb_var_screeninfo var = info->var; struct list_head *pos, *n; struct fb_modelist *modelist; struct fb_videomode *m, mode; int err = 1; list_for_each_safe(pos, n, &info->modelist) { modelist = list_entry(pos, struct fb_modelist, list); m = &modelist->mode; fb_videomode_to_var(&var, m); var.activate = FB_ACTIVATE_TEST; err = fb_set_var(info, &var); fb_var_to_videomode(&mode, &var); if (err || !fb_mode_is_equal(m, &mode)) { list_del(pos); kfree(pos); } } err = 1; if (!list_empty(&info->modelist)) { if (!lock_fb_info(info)) return -ENODEV; event.info = info; err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); unlock_fb_info(info); } return err; } static char *video_options[FB_MAX] __read_mostly; static int ofonly __read_mostly; /** * fb_get_options - get kernel boot parameters * @name: framebuffer name as it would appear in * the boot parameter line * (video=<name>:<options>) * @option: the option will be stored here * * NOTE: Needed to maintain backwards compatibility */ int fb_get_options(char *name, char **option) { char *opt, *options = NULL; int opt_len, retval = 0; int name_len = strlen(name), i; if (name_len && ofonly && strncmp(name, "offb", 4)) retval = 1; if (name_len && !retval) { for (i = 0; i < FB_MAX; i++) { if (video_options[i] == NULL) continue; opt_len = strlen(video_options[i]); if (!opt_len) continue; opt = video_options[i]; if (!strncmp(name, opt, name_len) && opt[name_len] == ':') options = opt + name_len + 1; } } if (options && !strncmp(options, "off", 3)) retval = 1; if (option) *option = options; return retval; } #ifndef MODULE /** * video_setup - process command line options * @options: string of options * * Process command line options for frame buffer subsystem. * * NOTE: This function is a __setup and __init function. * It only stores the options. Drivers have to call * fb_get_options() as necessary. * * Returns zero. * */ static int __init video_setup(char *options) { int i, global = 0; if (!options || !*options) global = 1; if (!global && !strncmp(options, "ofonly", 6)) { ofonly = 1; global = 1; } if (!global && !strstr(options, "fb:")) { fb_mode_option = options; global = 1; } if (!global) { for (i = 0; i < FB_MAX; i++) { if (video_options[i] == NULL) { video_options[i] = options; break; } } } return 1; } __setup("video=", video_setup); #endif /* * Visible symbols for modules */ EXPORT_SYMBOL(register_framebuffer); EXPORT_SYMBOL(unregister_framebuffer); EXPORT_SYMBOL(num_registered_fb); EXPORT_SYMBOL(registered_fb); EXPORT_SYMBOL(fb_show_logo); EXPORT_SYMBOL(fb_set_var); EXPORT_SYMBOL(fb_blank); EXPORT_SYMBOL(fb_pan_display); EXPORT_SYMBOL(fb_get_buffer_offset); EXPORT_SYMBOL(fb_set_suspend); EXPORT_SYMBOL(fb_get_options); MODULE_LICENSE("GPL");