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authorTvrtko Ursulin <tvrtko.ursulin@intel.com>2015-07-14 11:13:08 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2015-07-15 11:38:38 +0200
commitc631d5f90e7ee246536c72f80ade86e9ef4d2f13 (patch)
tree8ab907fe4017aad8a8afe3e2e0d0f141216316da
parentd4acc1651588835b802a2049f4f3a2adcc1af750 (diff)
drm: Provide compat ioctl for addfb2.1topic/drm-fixes-2015-07-16
Frame buffer modifiers extensions provided in; commit e3eb3250d84ef97b766312345774367b6a310db8 Author: Rob Clark <robdclark@gmail.com> Date: Thu Feb 5 14:41:52 2015 +0000 drm: add support for tiled/compressed/etc modifier in addfb2 Missed the structure packing/alignment problem where 64-bit members were added after the odd number of 32-bit ones. This makes the compiler produce structures of different sizes under 32- and 64-bit x86 targets and makes the ioctl need explicit compat handling. v2: Removed the typedef. (Daniel Vetter) Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: dri-devel@lists.freedesktop.org Cc: Rob Clark <robdclark@gmail.com> Cc: Daniel Stone <daniels@collabora.com> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: stable@vger.kernel.org [danvet: Squash in compile fix from Mika.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
-rw-r--r--drivers/gpu/drm/drm_ioc32.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_ioc32.c b/drivers/gpu/drm/drm_ioc32.c
index aa8bbb460c57..9cfcd0aef0df 100644
--- a/drivers/gpu/drm/drm_ioc32.c
+++ b/drivers/gpu/drm/drm_ioc32.c
@@ -70,6 +70,8 @@
#define DRM_IOCTL_WAIT_VBLANK32 DRM_IOWR(0x3a, drm_wait_vblank32_t)
+#define DRM_IOCTL_MODE_ADDFB232 DRM_IOWR(0xb8, drm_mode_fb_cmd232_t)
+
typedef struct drm_version_32 {
int version_major; /**< Major version */
int version_minor; /**< Minor version */
@@ -1016,6 +1018,63 @@ static int compat_drm_wait_vblank(struct file *file, unsigned int cmd,
return 0;
}
+typedef struct drm_mode_fb_cmd232 {
+ u32 fb_id;
+ u32 width;
+ u32 height;
+ u32 pixel_format;
+ u32 flags;
+ u32 handles[4];
+ u32 pitches[4];
+ u32 offsets[4];
+ u64 modifier[4];
+} __attribute__((packed)) drm_mode_fb_cmd232_t;
+
+static int compat_drm_mode_addfb2(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct drm_mode_fb_cmd232 __user *argp = (void __user *)arg;
+ struct drm_mode_fb_cmd232 req32;
+ struct drm_mode_fb_cmd2 __user *req64;
+ int i;
+ int err;
+
+ if (copy_from_user(&req32, argp, sizeof(req32)))
+ return -EFAULT;
+
+ req64 = compat_alloc_user_space(sizeof(*req64));
+
+ if (!access_ok(VERIFY_WRITE, req64, sizeof(*req64))
+ || __put_user(req32.width, &req64->width)
+ || __put_user(req32.height, &req64->height)
+ || __put_user(req32.pixel_format, &req64->pixel_format)
+ || __put_user(req32.flags, &req64->flags))
+ return -EFAULT;
+
+ for (i = 0; i < 4; i++) {
+ if (__put_user(req32.handles[i], &req64->handles[i]))
+ return -EFAULT;
+ if (__put_user(req32.pitches[i], &req64->pitches[i]))
+ return -EFAULT;
+ if (__put_user(req32.offsets[i], &req64->offsets[i]))
+ return -EFAULT;
+ if (__put_user(req32.modifier[i], &req64->modifier[i]))
+ return -EFAULT;
+ }
+
+ err = drm_ioctl(file, DRM_IOCTL_MODE_ADDFB2, (unsigned long)req64);
+ if (err)
+ return err;
+
+ if (__get_user(req32.fb_id, &req64->fb_id))
+ return -EFAULT;
+
+ if (copy_to_user(argp, &req32, sizeof(req32)))
+ return -EFAULT;
+
+ return 0;
+}
+
static drm_ioctl_compat_t *drm_compat_ioctls[] = {
[DRM_IOCTL_NR(DRM_IOCTL_VERSION32)] = compat_drm_version,
[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE32)] = compat_drm_getunique,
@@ -1048,6 +1107,7 @@ static drm_ioctl_compat_t *drm_compat_ioctls[] = {
[DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW32)] = compat_drm_update_draw,
#endif
[DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK32)] = compat_drm_wait_vblank,
+ [DRM_IOCTL_NR(DRM_IOCTL_MODE_ADDFB232)] = compat_drm_mode_addfb2,
};
/**

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