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authorAntonino A. Daplas <adaplas@gmail.com>2007-05-08 00:39:03 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:15:30 -0700
commit09aaf268eb1d22eee690d26a913f660e2081597f (patch)
tree9179447608d1c7ee23af266d2bae2eef6d05a1c9 /include/linux
parent3f9b0880e4a96b02bc0131451f2f6231cd90bd94 (diff)
fbdev: add fb_read/fb_write functions for framebuffers in system RAM
The functions fb_read() and fb_write in fbmem.c assume that the framebuffer is in IO memory. However, we have 3 drivers (hecubafb, arcfb, and vfb) where the framebuffer is allocated from system RAM (via vmalloc). Using __raw_read/__raw_write (fb_readl/fb_writel) for these drivers is illegal, especially in other platforms. Create file read and write methods for these types of drivers. These are named fb_sys_read() and fb_sys_write(). Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/fb.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/fb.h b/include/linux/fb.h
index acb6ddb68fa..70d154a02c5 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -903,6 +903,10 @@ extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
+extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
+ size_t count, loff_t *ppos);
+extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
+ size_t count, loff_t *ppos);
/* drivers/video/fbmem.c */
extern int register_framebuffer(struct fb_info *fb_info);