91 lines
2.8 KiB
Diff
91 lines
2.8 KiB
Diff
From d0f5437f8fcabde286fcb89427ef79b93dc4c50d Mon Sep 17 00:00:00 2001
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From: Siarhei Siamashka <siarhei.siamashka@gmail.com>
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Date: Mon, 17 Jun 2013 13:32:11 +0300
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Subject: [PATCH 25/54] fbdev: add FBIOCOPYAREA ioctl
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Based on the patch authored by Ali Gholami Rudi at
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https://lkml.org/lkml/2009/7/13/153
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Provide an ioctl for userspace applications, but only if this operation
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is hardware accelerated (otherwide it does not make any sense).
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Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
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---
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drivers/video/fbmem.c | 30 ++++++++++++++++++++++++++++++
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include/uapi/linux/fb.h | 5 +++++
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2 files changed, 35 insertions(+)
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--- a/drivers/video/fbmem.c
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+++ b/drivers/video/fbmem.c
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@@ -1083,6 +1083,25 @@ fb_blank(struct fb_info *info, int blank
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}
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EXPORT_SYMBOL(fb_blank);
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+static int fb_copyarea_user(struct fb_info *info,
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+ struct fb_copyarea *copy)
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+{
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+ int ret = 0;
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+ if (!lock_fb_info(info))
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+ return -ENODEV;
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+ if (copy->dx + copy->width > info->var.xres ||
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+ copy->sx + copy->width > info->var.xres ||
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+ copy->dy + copy->height > info->var.yres ||
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+ copy->sy + copy->height > info->var.yres) {
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+ ret = -EINVAL;
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+ goto out;
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+ }
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+ info->fbops->fb_copyarea(info, copy);
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+out:
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+ unlock_fb_info(info);
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+ return ret;
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+}
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+
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static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
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unsigned long arg)
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{
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@@ -1093,6 +1112,7 @@ static long do_fb_ioctl(struct fb_info *
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struct fb_cmap cmap_from;
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struct fb_cmap_user cmap;
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struct fb_event event;
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+ struct fb_copyarea copy;
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void __user *argp = (void __user *)arg;
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long ret = 0;
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@@ -1210,6 +1230,15 @@ static long do_fb_ioctl(struct fb_info *
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unlock_fb_info(info);
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console_unlock();
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break;
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+ case FBIOCOPYAREA:
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+ if (info->flags & FBINFO_HWACCEL_COPYAREA) {
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+ /* only provide this ioctl if it is accelerated */
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+ if (copy_from_user(©, argp, sizeof(copy)))
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+ return -EFAULT;
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+ ret = fb_copyarea_user(info, ©);
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+ break;
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+ }
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+ /* fall through */
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default:
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if (!lock_fb_info(info))
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return -ENODEV;
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@@ -1364,6 +1393,7 @@ static long fb_compat_ioctl(struct file
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case FBIOPAN_DISPLAY:
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case FBIOGET_CON2FBMAP:
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case FBIOPUT_CON2FBMAP:
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+ case FBIOCOPYAREA:
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arg = (unsigned long) compat_ptr(arg);
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case FBIOBLANK:
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ret = do_fb_ioctl(info, cmd, arg);
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--- a/include/uapi/linux/fb.h
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+++ b/include/uapi/linux/fb.h
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@@ -34,6 +34,11 @@
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#define FBIOPUT_MODEINFO 0x4617
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#define FBIOGET_DISPINFO 0x4618
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#define FBIO_WAITFORVSYNC _IOW('F', 0x20, __u32)
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+/*
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+ * HACK: use 'z' in order not to clash with any other ioctl numbers which might
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+ * be concurrently added to the mainline kernel
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+ */
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+#define FBIOCOPYAREA _IOW('z', 0x21, struct fb_copyarea)
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#define FB_TYPE_PACKED_PIXELS 0 /* Packed Pixels */
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#define FB_TYPE_PLANES 1 /* Non interleaved planes */
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