| /* |
| * 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/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 <linux/fbcon.h> |
| #include <linux/mem_encrypt.h> |
| #include <linux/pci.h> |
| |
| #include <asm/fb.h> |
| |
| |
| /* |
| * Frame buffer device initialization and setup routines |
| */ |
| |
| #define FBPIXMAPSIZE (1024 * 8) |
| |
| static DEFINE_MUTEX(registration_lock); |
| |
| struct fb_info *registered_fb[FB_MAX] __read_mostly; |
| EXPORT_SYMBOL(registered_fb); |
| |
| int num_registered_fb __read_mostly; |
| EXPORT_SYMBOL(num_registered_fb); |
| |
| bool fb_center_logo __read_mostly; |
| |
| int fb_logo_count __read_mostly = -1; |
| |
| static struct fb_info *get_fb_info(unsigned int idx) |
| { |
| struct fb_info *fb_info; |
| |
| if (idx >= FB_MAX) |
| return ERR_PTR(-ENODEV); |
| |
| mutex_lock(®istration_lock); |
| fb_info = registered_fb[idx]; |
| if (fb_info) |
| atomic_inc(&fb_info->count); |
| mutex_unlock(®istration_lock); |
| |
| return fb_info; |
| } |
| |
| static void put_fb_info(struct fb_info *fb_info) |
| { |
| if (!atomic_dec_and_test(&fb_info->count)) |
| return; |
| if (fb_info->fbops->fb_destroy) |
| fb_info->fbops->fb_destroy(fb_info); |
| } |
| |
| /* |
| * 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; |
| } |
| EXPORT_SYMBOL(fb_get_buffer_offset); |
| |
| #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 && j < logo->width; 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 (image->width > info->var.xres || image->height > info->var.yres) |
| return; |
| |
| 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) { |
| u32 dx = image->dx; |
| |
| for (x = 0; x < num && image->dx <= dx; 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) { |
| u32 dy = image->dy; |
| |
| for (x = 0; x < num && image->dy <= dy; 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->fbops->owner) |
| 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_array(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); |
| } |
| |
| if (fb_center_logo) { |
| int xres = info->var.xres; |
| int yres = info->var.yres; |
| |
| if (rotate == FB_ROTATE_CW || rotate == FB_ROTATE_CCW) { |
| xres = info->var.yres; |
| yres = info->var.xres; |
| } |
| |
| while (n && (n * (logo->width + 8) - 8 > xres)) |
| --n; |
| image.dx = (xres - n * (logo->width + 8) - 8) / 2; |
| image.dy = y ?: (yres - logo->height) / 2; |
| } else { |
| image.dx = 0; |
| image.dy = y; |
| } |
| |
| image.width = logo->width; |
| image.height = logo->height; |
| |
| if (rotate) { |
| logo_rotate = kmalloc_array(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 image.dy + 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; |
| int height; |
| |
| memset(&fb_logo, 0, sizeof(struct logo_data)); |
| |
| if (info->flags & FBINFO_MISC_TILEBLITTING || |
| info->fbops->owner || !fb_logo_count) |
| 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; |
| } |
| } |
| |
| height = fb_logo.logo->height; |
| if (fb_center_logo) |
| height += (yres - fb_logo.logo->height) / 2; |
| |
| return fb_prepare_extra_logos(info, height, yres); |
| } |
| |
| int fb_show_logo(struct fb_info *info, int rotate) |
| { |
| unsigned int count; |
| int y; |
| |
| if (!fb_logo_count) |
| return 0; |
| |
| count = fb_logo_count < 0 ? num_online_cpus() : fb_logo_count; |
| y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, count); |
| 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 */ |
| EXPORT_SYMBOL(fb_prepare_logo); |
| EXPORT_SYMBOL(fb_show_logo); |
| |
| static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
| { |
| mutex_lock(®istration_lock); |
| 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) |
| { |
| mutex_unlock(®istration_lock); |
| } |
| |
| 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 __maybe_unused proc_fb_seq_ops = { |
| .start = fb_seq_start, |
| .next = fb_seq_next, |
| .stop = fb_seq_stop, |
| .show = fb_seq_show, |
| }; |
| |
| /* |
| * We hold a reference to the fb_info in file->private_data, |
| * but if the current registered fb has changed, we don't |
| * actually want to use it. |
| * |
| * So look up the fb_info using the inode minor number, |
| * and just verify it against the reference we have. |
| */ |
| static struct fb_info *file_fb_info(struct file *file) |
| { |
| struct inode *inode = file_inode(file); |
| int fbidx = iminor(inode); |
| struct fb_info *info = registered_fb[fbidx]; |
| |
| if (info != file->private_data) |
| info = NULL; |
| return info; |
| } |
| |
| static ssize_t |
| fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
| { |
| unsigned long p = *ppos; |
| struct fb_info *info = file_fb_info(file); |
| u8 *buffer, *dst; |
| u8 __iomem *src; |
| int c, 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 = (u8 __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; |
| fb_memcpy_fromfb(dst, src, c); |
| dst += c; |
| src += c; |
| |
| 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 fb_info *info = file_fb_info(file); |
| u8 *buffer, *src; |
| u8 __iomem *dst; |
| int c, 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 = (u8 __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; |
| } |
| |
| fb_memcpy_tofb(dst, src, c); |
| dst += c; |
| src += c; |
| *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 > info->var.yres_virtual - yres || |
| var->xoffset > info->var.xres_virtual - info->var.xres) |
| 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; |
| } |
| EXPORT_SYMBOL(fb_pan_display); |
| |
| static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
| u32 activate) |
| { |
| 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; |
| fbcon_get_requirement(info, &caps); |
| 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 ret = 0; |
| u32 activate; |
| struct fb_var_screeninfo old_var; |
| struct fb_videomode mode; |
| struct fb_event event; |
| |
| 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) |
| fbcon_mode_deleted(info, &mode1); |
| |
| if (!ret) |
| fb_delete_videomode(&mode1, &info->modelist); |
| |
| |
| return ret ? -EINVAL : 0; |
| } |
| |
| if (!(var->activate & FB_ACTIVATE_FORCE) && |
| !memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) |
| return 0; |
| |
| activate = var->activate; |
| |
| /* When using FOURCC mode, make sure the red, green, blue and |
| * transp fields are set to 0. |
| */ |
| if ((info->fix.capabilities & FB_CAP_FOURCC) && |
| var->grayscale > 1) { |
| if (var->red.offset || var->green.offset || |
| var->blue.offset || var->transp.offset || |
| var->red.length || var->green.length || |
| var->blue.length || var->transp.length || |
| var->red.msb_right || var->green.msb_right || |
| var->blue.msb_right || var->transp.msb_right) |
| return -EINVAL; |
| } |
| |
| if (!info->fbops->fb_check_var) { |
| *var = info->var; |
| return 0; |
| } |
| |
| /* bitfill_aligned() assumes that it's at least 8x8 */ |
| if (var->xres < 8 || var->yres < 8) |
| return -EINVAL; |
| |
| ret = info->fbops->fb_check_var(var, info); |
| |
| if (ret) |
| return ret; |
| |
| if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW) |
| return 0; |
| |
| if (info->fbops->fb_get_caps) { |
| ret = fb_check_caps(info, var, activate); |
| |
| if (ret) |
| return ret; |
| } |
| |
| old_var = info->var; |
| info->var = *var; |
| |
| if (info->fbops->fb_set_par) { |
| ret = info->fbops->fb_set_par(info); |
| |
| if (ret) { |
| info->var = old_var; |
| printk(KERN_WARNING "detected " |
| "fb_set_par error, " |
| "error code: %d\n", ret); |
| return ret; |
| } |
| } |
| |
| 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) |
| return ret; |
| |
| event.info = info; |
| event.data = &mode; |
| fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(fb_set_var); |
| |
| int |
| fb_blank(struct fb_info *info, int blank) |
| { |
| struct fb_event event; |
| int ret = -EINVAL; |
| |
| if (blank > FB_BLANK_POWERDOWN) |
| blank = FB_BLANK_POWERDOWN; |
| |
| event.info = info; |
| event.data = ␣ |
| |
| if (info->fbops->fb_blank) |
| ret = info->fbops->fb_blank(blank, info); |
| |
| if (!ret) |
| fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(fb_blank); |
| |
| static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, |
| unsigned long arg) |
| { |
| const struct fb_ops *fb; |
| struct fb_var_screeninfo var; |
| struct fb_fix_screeninfo fix; |
| struct fb_cmap cmap_from; |
| struct fb_cmap_user cmap; |
| void __user *argp = (void __user *)arg; |
| long ret = 0; |
| |
| switch (cmd) { |
| case FBIOGET_VSCREENINFO: |
| lock_fb_info(info); |
| 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; |
| console_lock(); |
| lock_fb_info(info); |
| ret = fb_set_var(info, &var); |
| if (!ret) |
| fbcon_update_vcs(info, var.activate & FB_ACTIVATE_ALL); |
| unlock_fb_info(info); |
| console_unlock(); |
| if (!ret && copy_to_user(argp, &var, sizeof(var))) |
| ret = -EFAULT; |
| break; |
| case FBIOGET_FSCREENINFO: |
| lock_fb_info(info); |
| memcpy(&fix, &info->fix, sizeof(fix)); |
| if (info->flags & FBINFO_HIDE_SMEM_START) |
| fix.smem_start = 0; |
| 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; |
| lock_fb_info(info); |
| 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; |
| console_lock(); |
| lock_fb_info(info); |
| ret = fb_pan_display(info, &var); |
| unlock_fb_info(info); |
| console_unlock(); |
| if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
| return -EFAULT; |
| break; |
| case FBIO_CURSOR: |
| ret = -EINVAL; |
| break; |
| case FBIOGET_CON2FBMAP: |
| ret = fbcon_get_con2fb_map_ioctl(argp); |
| break; |
| case FBIOPUT_CON2FBMAP: |
| ret = fbcon_set_con2fb_map_ioctl(argp); |
| break; |
| case FBIOBLANK: |
| console_lock(); |
| lock_fb_info(info); |
| ret = fb_blank(info, arg); |
| /* might again call into fb_blank */ |
| fbcon_fb_blanked(info, arg); |
| unlock_fb_info(info); |
| console_unlock(); |
| break; |
| default: |
| lock_fb_info(info); |
| 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 fb_info *info = file_fb_info(file); |
| |
| if (!info) |
| return -ENODEV; |
| 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_cmap32 cmap32; |
| struct fb_cmap cmap_from; |
| struct fb_cmap_user cmap; |
| |
| if (copy_from_user(&cmap32, compat_ptr(arg), sizeof(cmap32))) |
| return -EFAULT; |
| |
| cmap = (struct fb_cmap_user) { |
| .start = cmap32.start, |
| .len = cmap32.len, |
| .red = compat_ptr(cmap32.red), |
| .green = compat_ptr(cmap32.green), |
| .blue = compat_ptr(cmap32.blue), |
| .transp = compat_ptr(cmap32.transp), |
| }; |
| |
| if (cmd == FBIOPUTCMAP) |
| return fb_set_user_cmap(&cmap, info); |
| |
| lock_fb_info(info); |
| cmap_from = info->cmap; |
| unlock_fb_info(info); |
| |
| return fb_cmap_to_user(&cmap_from, &cmap); |
| } |
| |
| 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)); |
| |
| if (err) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct fb_fix_screeninfo fix; |
| |
| lock_fb_info(info); |
| fix = info->fix; |
| if (info->flags & FBINFO_HIDE_SMEM_START) |
| fix.smem_start = 0; |
| unlock_fb_info(info); |
| return do_fscreeninfo_to_user(&fix, compat_ptr(arg)); |
| } |
| |
| static long fb_compat_ioctl(struct file *file, unsigned int cmd, |
| unsigned long arg) |
| { |
| struct fb_info *info = file_fb_info(file); |
| const struct fb_ops *fb; |
| long ret = -ENOIOCTLCMD; |
| |
| if (!info) |
| return -ENODEV; |
| fb = info->fbops; |
| switch(cmd) { |
| case FBIOGET_VSCREENINFO: |
| case FBIOPUT_VSCREENINFO: |
| case FBIOPAN_DISPLAY: |
| case FBIOGET_CON2FBMAP: |
| case FBIOPUT_CON2FBMAP: |
| arg = (unsigned long) compat_ptr(arg); |
| fallthrough; |
| 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) |
| { |
| struct fb_info *info = file_fb_info(file); |
| int (*fb_mmap_fn)(struct fb_info *info, struct vm_area_struct *vma); |
| unsigned long mmio_pgoff; |
| unsigned long start; |
| u32 len; |
| |
| if (!info) |
| return -ENODEV; |
| mutex_lock(&info->mm_lock); |
| |
| fb_mmap_fn = info->fbops->fb_mmap; |
| |
| #if IS_ENABLED(CONFIG_FB_DEFERRED_IO) |
| if (info->fbdefio) |
| fb_mmap_fn = fb_deferred_io_mmap; |
| #endif |
| |
| if (fb_mmap_fn) { |
| int res; |
| |
| /* |
| * The framebuffer needs to be accessed decrypted, be sure |
| * SME protection is removed ahead of the call |
| */ |
| vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); |
| res = fb_mmap_fn(info, vma); |
| mutex_unlock(&info->mm_lock); |
| return res; |
| } |
| |
| /* |
| * Ugh. This can be either the frame buffer mapping, or |
| * if pgoff points past it, the mmio mapping. |
| */ |
| start = info->fix.smem_start; |
| len = info->fix.smem_len; |
| mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT; |
| if (vma->vm_pgoff >= mmio_pgoff) { |
| if (info->var.accel_flags) { |
| mutex_unlock(&info->mm_lock); |
| return -EINVAL; |
| } |
| |
| vma->vm_pgoff -= mmio_pgoff; |
| start = info->fix.mmio_start; |
| len = info->fix.mmio_len; |
| } |
| mutex_unlock(&info->mm_lock); |
| |
| vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
| fb_pgprotect(file, vma, start); |
| |
| return vm_iomap_memory(vma, start, len); |
| } |
| |
| 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; |
| |
| info = get_fb_info(fbidx); |
| if (!info) { |
| request_module("fb%d", fbidx); |
| info = get_fb_info(fbidx); |
| if (!info) |
| return -ENODEV; |
| } |
| if (IS_ERR(info)) |
| return PTR_ERR(info); |
| |
| lock_fb_info(info); |
| 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: |
| unlock_fb_info(info); |
| if (res) |
| put_fb_info(info); |
| 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; |
| |
| lock_fb_info(info); |
| if (info->fbops->fb_release) |
| info->fbops->fb_release(info,1); |
| module_put(info->fbops->owner); |
| unlock_fb_info(info); |
| put_fb_info(info); |
| return 0; |
| } |
| |
| #if defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && !defined(CONFIG_MMU) |
| unsigned long get_fb_unmapped_area(struct file *filp, |
| unsigned long addr, unsigned long len, |
| unsigned long pgoff, unsigned long flags) |
| { |
| struct fb_info * const info = filp->private_data; |
| unsigned long fb_size = PAGE_ALIGN(info->fix.smem_len); |
| |
| if (pgoff > fb_size || len > fb_size - pgoff) |
| return -EINVAL; |
| |
| return (unsigned long)info->screen_base + pgoff; |
| } |
| #endif |
| |
| 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, |
| #if defined(HAVE_ARCH_FB_UNMAPPED_AREA) || \ |
| (defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && \ |
| !defined(CONFIG_MMU)) |
| .get_unmapped_area = get_fb_unmapped_area, |
| #endif |
| #ifdef CONFIG_FB_DEFERRED_IO |
| .fsync = fb_deferred_io_fsync, |
| #endif |
| .llseek = default_llseek, |
| }; |
| |
| 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 apertures_overlap(struct aperture *gen, struct aperture *hw) |
| { |
| /* is the generic aperture base the same as the HW one */ |
| if (gen->base == hw->base) |
| return true; |
| /* is the generic aperture base inside the hw base->hw base+size */ |
| if (gen->base > hw->base && gen->base < hw->base + hw->size) |
| return true; |
| return false; |
| } |
| |
| static bool fb_do_apertures_overlap(struct apertures_struct *gena, |
| struct apertures_struct *hwa) |
| { |
| int i, j; |
| if (!hwa || !gena) |
| return false; |
| |
| for (i = 0; i < hwa->count; ++i) { |
| struct aperture *h = &hwa->ranges[i]; |
| for (j = 0; j < gena->count; ++j) { |
| struct aperture *g = &gena->ranges[j]; |
| printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n", |
| (unsigned long long)g->base, |
| (unsigned long long)g->size, |
| (unsigned long long)h->base, |
| (unsigned long long)h->size); |
| if (apertures_overlap(g, h)) |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| static void do_unregister_framebuffer(struct fb_info *fb_info); |
| |
| #define VGA_FB_PHYS 0xA0000 |
| static void do_remove_conflicting_framebuffers(struct apertures_struct *a, |
| const char *name, bool primary) |
| { |
| int i; |
| |
| /* check all firmware fbs and kick off if the base addr overlaps */ |
| for_each_registered_fb(i) { |
| struct apertures_struct *gen_aper; |
| |
| if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE)) |
| continue; |
| |
| gen_aper = registered_fb[i]->apertures; |
| if (fb_do_apertures_overlap(gen_aper, a) || |
| (primary && gen_aper && gen_aper->count && |
| gen_aper->ranges[0].base == VGA_FB_PHYS)) { |
| |
| printk(KERN_INFO "fb%d: switching to %s from %s\n", |
| i, name, registered_fb[i]->fix.id); |
| do_unregister_framebuffer(registered_fb[i]); |
| } |
| } |
| } |
| |
| static bool lockless_register_fb; |
| module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); |
| MODULE_PARM_DESC(lockless_register_fb, |
| "Lockless framebuffer registration for debugging [default=off]"); |
| |
| static int do_register_framebuffer(struct fb_info *fb_info) |
| { |
| int i, ret; |
| struct fb_videomode mode; |
| |
| if (fb_check_foreignness(fb_info)) |
| return -ENOSYS; |
| |
| do_remove_conflicting_framebuffers(fb_info->apertures, |
| fb_info->fix.id, |
| fb_is_primary_device(fb_info)); |
| |
| if (num_registered_fb == FB_MAX) |
| return -ENXIO; |
| |
| num_registered_fb++; |
| for (i = 0 ; i < FB_MAX; i++) |
| if (!registered_fb[i]) |
| break; |
| fb_info->node = i; |
| atomic_set(&fb_info->count, 1); |
| mutex_init(&fb_info->lock); |
| mutex_init(&fb_info->mm_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); |
| |
| if (fb_info->skip_vt_switch) |
| pm_vt_switch_required(fb_info->dev, false); |
| else |
| pm_vt_switch_required(fb_info->dev, true); |
| |
| fb_var_to_videomode(&mode, &fb_info->var); |
| fb_add_videomode(&mode, &fb_info->modelist); |
| registered_fb[i] = fb_info; |
| |
| #ifdef CONFIG_GUMSTIX_AM200EPD |
| { |
| struct fb_event event; |
| event.info = fb_info; |
| fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
| } |
| #endif |
| |
| if (!lockless_register_fb) |
| console_lock(); |
| else |
| atomic_inc(&ignore_console_lock_warning); |
| lock_fb_info(fb_info); |
| ret = fbcon_fb_registered(fb_info); |
| unlock_fb_info(fb_info); |
| |
| if (!lockless_register_fb) |
| console_unlock(); |
| else |
| atomic_dec(&ignore_console_lock_warning); |
| return ret; |
| } |
| |
| static void unbind_console(struct fb_info *fb_info) |
| { |
| int i = fb_info->node; |
| |
| if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)) |
| return; |
| |
| console_lock(); |
| lock_fb_info(fb_info); |
| fbcon_fb_unbind(fb_info); |
| unlock_fb_info(fb_info); |
| console_unlock(); |
| } |
| |
| static void unlink_framebuffer(struct fb_info *fb_info) |
| { |
| int i; |
| |
| i = fb_info->node; |
| if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)) |
| return; |
| |
| if (!fb_info->dev) |
| return; |
| |
| device_destroy(fb_class, MKDEV(FB_MAJOR, i)); |
| |
| pm_vt_switch_unregister(fb_info->dev); |
| |
| unbind_console(fb_info); |
| |
| fb_info->dev = NULL; |
| } |
| |
| static void do_unregister_framebuffer(struct fb_info *fb_info) |
| { |
| unlink_framebuffer(fb_info); |
| 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[fb_info->node] = NULL; |
| num_registered_fb--; |
| fb_cleanup_device(fb_info); |
| #ifdef CONFIG_GUMSTIX_AM200EPD |
| { |
| struct fb_event event; |
| event.info = fb_info; |
| fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
| } |
| #endif |
| console_lock(); |
| fbcon_fb_unregistered(fb_info); |
| console_unlock(); |
| |
| /* this may free fb info */ |
| put_fb_info(fb_info); |
| } |
| |
| /** |
| * remove_conflicting_framebuffers - remove firmware-configured framebuffers |
| * @a: memory range, users of which are to be removed |
| * @name: requesting driver name |
| * @primary: also kick vga16fb if present |
| * |
| * This function removes framebuffer devices (initialized by firmware/bootloader) |
| * which use memory range described by @a. If @a is NULL all such devices are |
| * removed. |
| */ |
| int remove_conflicting_framebuffers(struct apertures_struct *a, |
| const char *name, bool primary) |
| { |
| bool do_free = false; |
| |
| if (!a) { |
| a = alloc_apertures(1); |
| if (!a) |
| return -ENOMEM; |
| |
| a->ranges[0].base = 0; |
| a->ranges[0].size = ~0; |
| do_free = true; |
| } |
| |
| mutex_lock(®istration_lock); |
| do_remove_conflicting_framebuffers(a, name, primary); |
| mutex_unlock(®istration_lock); |
| |
| if (do_free) |
| kfree(a); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(remove_conflicting_framebuffers); |
| |
| /** |
| * remove_conflicting_pci_framebuffers - remove firmware-configured framebuffers for PCI devices |
| * @pdev: PCI device |
| * @name: requesting driver name |
| * |
| * This function removes framebuffer devices (eg. initialized by firmware) |
| * using memory range configured for any of @pdev's memory bars. |
| * |
| * The function assumes that PCI device with shadowed ROM drives a primary |
| * display and so kicks out vga16fb. |
| */ |
| int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, const char *name) |
| { |
| struct apertures_struct *ap; |
| bool primary = false; |
| int err, idx, bar; |
| |
| for (idx = 0, bar = 0; bar < PCI_STD_NUM_BARS; bar++) { |
| if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) |
| continue; |
| idx++; |
| } |
| |
| ap = alloc_apertures(idx); |
| if (!ap) |
| return -ENOMEM; |
| |
| for (idx = 0, bar = 0; bar < PCI_STD_NUM_BARS; bar++) { |
| if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) |
| continue; |
| ap->ranges[idx].base = pci_resource_start(pdev, bar); |
| ap->ranges[idx].size = pci_resource_len(pdev, bar); |
| pci_dbg(pdev, "%s: bar %d: 0x%lx -> 0x%lx\n", __func__, bar, |
| (unsigned long)pci_resource_start(pdev, bar), |
| (unsigned long)pci_resource_end(pdev, bar)); |
| idx++; |
| } |
| |
| #ifdef CONFIG_X86 |
| primary = pdev->resource[PCI_ROM_RESOURCE].flags & |
| IORESOURCE_ROM_SHADOW; |
| #endif |
| err = remove_conflicting_framebuffers(ap, name, primary); |
| kfree(ap); |
| return err; |
| } |
| EXPORT_SYMBOL(remove_conflicting_pci_framebuffers); |
| |
| /** |
| * 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 ret; |
| |
| mutex_lock(®istration_lock); |
| ret = do_register_framebuffer(fb_info); |
| mutex_unlock(®istration_lock); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(register_framebuffer); |
| |
| /** |
| * 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. |
| */ |
| void |
| unregister_framebuffer(struct fb_info *fb_info) |
| { |
| mutex_lock(®istration_lock); |
| do_unregister_framebuffer(fb_info); |
| mutex_unlock(®istration_lock); |
| } |
| EXPORT_SYMBOL(unregister_framebuffer); |
| |
| /** |
| * 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) |
| { |
| WARN_CONSOLE_UNLOCKED(); |
| |
| if (state) { |
| fbcon_suspended(info); |
| info->state = FBINFO_STATE_SUSPENDED; |
| } else { |
| info->state = FBINFO_STATE_RUNNING; |
| fbcon_resumed(info); |
| } |
| } |
| EXPORT_SYMBOL(fb_set_suspend); |
| |
| /** |
| * 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) |
| { |
| int ret; |
| |
| if (!proc_create_seq("fb", 0, NULL, &proc_fb_seq_ops)) |
| return -ENOMEM; |
| |
| ret = register_chrdev(FB_MAJOR, "fb", &fb_fops); |
| if (ret) { |
| printk("unable to get major %d for fb devs\n", FB_MAJOR); |
| goto err_chrdev; |
| } |
| |
| fb_class = class_create(THIS_MODULE, "graphics"); |
| if (IS_ERR(fb_class)) { |
| ret = PTR_ERR(fb_class); |
| pr_warn("Unable to create fb class; errno = %d\n", ret); |
| fb_class = NULL; |
| goto err_class; |
| } |
| |
| fb_console_init(); |
| |
| return 0; |
| |
| err_class: |
| unregister_chrdev(FB_MAJOR, "fb"); |
| err_chrdev: |
| remove_proc_entry("fb", NULL); |
| return ret; |
| } |
| |
| #ifdef MODULE |
| module_init(fbmem_init); |
| static void __exit |
| fbmem_exit(void) |
| { |
| fb_console_exit(); |
| |
| 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_var_screeninfo var = info->var; |
| struct list_head *pos, *n; |
| struct fb_modelist *modelist; |
| struct fb_videomode *m, mode; |
| int err; |
| |
| 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); |
| } |
| } |
| |
| if (list_empty(&info->modelist)) |
| return 1; |
| |
| fbcon_new_modelist(info); |
| |
| return 0; |
| } |
| |
| MODULE_LICENSE("GPL"); |