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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <linux/compat.h>#include <linux/export.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/string.h>#include <linux/fb.h>#include <linux/mm.h>#include <linux/uaccess.h>#include <linux/of.h>
#include <asm/fbio.h>
#include "sbuslib.h"
void sbusfb_fill_var(struct fb_var_screeninfo *var, struct device_node *dp, int bpp){ memset(var, 0, sizeof(*var));
var->xres = of_getintprop_default(dp, "width", 1152); var->yres = of_getintprop_default(dp, "height", 900); var->xres_virtual = var->xres; var->yres_virtual = var->yres; var->bits_per_pixel = bpp;}
EXPORT_SYMBOL(sbusfb_fill_var);
static unsigned long sbusfb_mmapsize(long size, unsigned long fbsize){ if (size == SBUS_MMAP_EMPTY) return 0; if (size >= 0) return size; return fbsize * (-size);}
int sbusfb_mmap_helper(const struct sbus_mmap_map *map, unsigned long physbase, unsigned long fbsize, unsigned long iospace, struct vm_area_struct *vma){ unsigned int size, page, r, map_size; unsigned long map_offset = 0; unsigned long off; int i;
if (!(vma->vm_flags & (VM_SHARED | VM_MAYSHARE))) return -EINVAL;
size = vma->vm_end - vma->vm_start; if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) return -EINVAL;
off = vma->vm_pgoff << PAGE_SHIFT;
/* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */
vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
/* Each page, see which map applies */ for (page = 0; page < size; ){ map_size = 0; for (i = 0; map[i].size; i++) if (map[i].voff == off+page) { map_size = sbusfb_mmapsize(map[i].size, fbsize);#ifdef __sparc_v9__#define POFF_MASK (PAGE_MASK|0x1UL)#else#define POFF_MASK (PAGE_MASK)#endif map_offset = (physbase + map[i].poff) & POFF_MASK; break; } if (!map_size) { page += PAGE_SIZE; continue; } if (page + map_size > size) map_size = size - page; r = io_remap_pfn_range(vma, vma->vm_start + page, MK_IOSPACE_PFN(iospace, map_offset >> PAGE_SHIFT), map_size, vma->vm_page_prot); if (r) return -EAGAIN; page += map_size; }
return 0;}EXPORT_SYMBOL(sbusfb_mmap_helper);
int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg, struct fb_info *info, int type, int fb_depth, unsigned long fb_size){ switch(cmd) { case FBIOGTYPE: { struct fbtype __user *f = (struct fbtype __user *) arg;
if (put_user(type, &f->fb_type) || put_user(info->var.yres, &f->fb_height) || put_user(info->var.xres, &f->fb_width) || put_user(fb_depth, &f->fb_depth) || put_user(0, &f->fb_cmsize) || put_user(fb_size, &f->fb_cmsize)) return -EFAULT; return 0; } case FBIOPUTCMAP_SPARC: { struct fbcmap __user *c = (struct fbcmap __user *) arg; struct fb_cmap cmap; u16 red, green, blue; u8 red8, green8, blue8; unsigned char __user *ured; unsigned char __user *ugreen; unsigned char __user *ublue; unsigned int index, count, i;
if (get_user(index, &c->index) || get_user(count, &c->count) || get_user(ured, &c->red) || get_user(ugreen, &c->green) || get_user(ublue, &c->blue)) return -EFAULT;
cmap.len = 1; cmap.red = &red; cmap.green = &green; cmap.blue = &blue; cmap.transp = NULL; for (i = 0; i < count; i++) { int err;
if (get_user(red8, &ured[i]) || get_user(green8, &ugreen[i]) || get_user(blue8, &ublue[i])) return -EFAULT;
red = red8 << 8; green = green8 << 8; blue = blue8 << 8;
cmap.start = index + i; err = fb_set_cmap(&cmap, info); if (err) return err; } return 0; } case FBIOGETCMAP_SPARC: { struct fbcmap __user *c = (struct fbcmap __user *) arg; unsigned char __user *ured; unsigned char __user *ugreen; unsigned char __user *ublue; struct fb_cmap *cmap = &info->cmap; unsigned int index, count, i; u8 red, green, blue;
if (get_user(index, &c->index) || get_user(count, &c->count) || get_user(ured, &c->red) || get_user(ugreen, &c->green) || get_user(ublue, &c->blue)) return -EFAULT;
if (index > cmap->len || count > cmap->len - index) return -EINVAL;
for (i = 0; i < count; i++) { red = cmap->red[index + i] >> 8; green = cmap->green[index + i] >> 8; blue = cmap->blue[index + i] >> 8; if (put_user(red, &ured[i]) || put_user(green, &ugreen[i]) || put_user(blue, &ublue[i])) return -EFAULT; } return 0; } default: return -EINVAL; }}EXPORT_SYMBOL(sbusfb_ioctl_helper);
#ifdef CONFIG_COMPATint sbusfb_compat_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg){ switch (cmd) { case FBIOGTYPE: case FBIOSATTR: case FBIOGATTR: case FBIOSVIDEO: case FBIOGVIDEO: case FBIOSCURSOR32: case FBIOGCURSOR32: /* This is not implemented yet. Later it should be converted... */ case FBIOSCURPOS: case FBIOGCURPOS: case FBIOGCURMAX: return info->fbops->fb_ioctl(info, cmd, arg); case FBIOPUTCMAP32: case FBIOPUTCMAP_SPARC: { struct fbcmap32 c; struct fb_cmap cmap; u16 red, green, blue; u8 red8, green8, blue8; unsigned char __user *ured; unsigned char __user *ugreen; unsigned char __user *ublue; unsigned int i;
if (copy_from_user(&c, compat_ptr(arg), sizeof(c))) return -EFAULT; ured = compat_ptr(c.red); ugreen = compat_ptr(c.green); ublue = compat_ptr(c.blue);
cmap.len = 1; cmap.red = &red; cmap.green = &green; cmap.blue = &blue; cmap.transp = NULL; for (i = 0; i < c.count; i++) { int err;
if (get_user(red8, &ured[i]) || get_user(green8, &ugreen[i]) || get_user(blue8, &ublue[i])) return -EFAULT;
red = red8 << 8; green = green8 << 8; blue = blue8 << 8;
cmap.start = c.index + i; err = fb_set_cmap(&cmap, info); if (err) return err; } return 0; } case FBIOGETCMAP32: { struct fbcmap32 c; unsigned char __user *ured; unsigned char __user *ugreen; unsigned char __user *ublue; struct fb_cmap *cmap = &info->cmap; unsigned int index, i; u8 red, green, blue;
if (copy_from_user(&c, compat_ptr(arg), sizeof(c))) return -EFAULT; index = c.index; ured = compat_ptr(c.red); ugreen = compat_ptr(c.green); ublue = compat_ptr(c.blue);
if (index > cmap->len || c.count > cmap->len - index) return -EINVAL;
for (i = 0; i < c.count; i++) { red = cmap->red[index + i] >> 8; green = cmap->green[index + i] >> 8; blue = cmap->blue[index + i] >> 8; if (put_user(red, &ured[i]) || put_user(green, &ugreen[i]) || put_user(blue, &ublue[i])) return -EFAULT; } return 0; } default: return -ENOIOCTLCMD; }}EXPORT_SYMBOL(sbusfb_compat_ioctl);#endif