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| author | Antonino A. Daplas <adaplas@gmail.com> | 2007-05-08 00:39:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:30 -0700 |
| commit | 09aaf268eb1d22eee690d26a913f660e2081597f (patch) | |
| tree | 9179447608d1c7ee23af266d2bae2eef6d05a1c9 /include/linux/fb.h | |
| parent | 3f9b0880e4a96b02bc0131451f2f6231cd90bd94 (diff) | |
| download | linux-09aaf268eb1d22eee690d26a913f660e2081597f.tar.gz linux-09aaf268eb1d22eee690d26a913f660e2081597f.tar.bz2 linux-09aaf268eb1d22eee690d26a913f660e2081597f.zip | |
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/fb.h')
| -rw-r--r-- | include/linux/fb.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/fb.h b/include/linux/fb.h index acb6ddb68fa2..70d154a02c5c 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); |