Merge master.kernel.org:/home/rmk/linux-2.6-arm

[linux-2.6] / drivers / video / fbmem.c

diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 7a2a8fa50b3b83a0e6a27493a6c14f117029b6aa..9f180096c896f6330678adc74c78316aef458b0e 100644 (file)
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -14,6 +14,7 @@
 #include <linux/config.h>
 #include <linux/module.h>
 
+#include <linux/compat.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
@@ -933,18 +934,154 @@ fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 }
 
 #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 inode *inode, struct file *file,
+                       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 = fb_ioctl(inode, file, 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 inode *inode, struct file *file,
+                               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 = fb_ioctl(inode, file, 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)
 {
-       int fbidx = iminor(file->f_dentry->d_inode);
+       struct inode *inode = file->f_dentry->d_inode;
+       int fbidx = iminor(inode);
        struct fb_info *info = registered_fb[fbidx];
        struct fb_ops *fb = info->fbops;
-       long ret;
+       long ret = -ENOIOCTLCMD;
 
-       if (fb->fb_compat_ioctl == NULL)
-               return -ENOIOCTLCMD;
        lock_kernel();
-       ret = fb->fb_compat_ioctl(file, cmd, arg, info);
+       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 = fb_ioctl(inode, file, cmd, arg);
+               break;
+
+       case FBIOGET_FSCREENINFO:
+               ret = fb_get_fscreeninfo(inode, file, cmd, arg);
+               break;
+
+       case FBIOGETCMAP:
+       case FBIOPUTCMAP:
+               ret = fb_getput_cmap(inode, file, cmd, arg);
+               break;
+
+       default:
+               if (fb->fb_compat_ioctl)
+                       ret = fb->fb_compat_ioctl(file, cmd, arg, info);
+               break;
+       }
        unlock_kernel();
        return ret;
 }
@@ -1319,6 +1456,28 @@ int fb_new_modelist(struct fb_info *info)
        return err;
 }
 
+/**
+ * fb_con_duit - user<->fbcon passthrough
+ * @info: struct fb_info
+ * @event: notification event to be passed to fbcon
+ * @data: private data
+ *
+ * DESCRIPTION
+ * This function is an fbcon-user event passing channel
+ * which bypasses fbdev.  This is hopefully temporary
+ * until a user interface for fbcon is created
+ */
+int fb_con_duit(struct fb_info *info, int event, void *data)
+{
+       struct fb_event evnt;
+
+       evnt.info = info;
+       evnt.data = data;
+
+       return notifier_call_chain(&fb_notifier_list, event, &evnt);
+}
+EXPORT_SYMBOL(fb_con_duit);
+
 static char *video_options[FB_MAX];
 static int ofonly;