Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1202 insertions, 0 deletions

diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
new file mode 100644
index 000000000..f3bed3785
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -0,0 +1,1202 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ioctl32.c: Conversion between 32bit and 64bit native ioctls.
+ *	Separated from fs stuff by Arnd Bergmann <arnd@arndb.de>
+ *
+ * Copyright (C) 1997-2000  Jakub Jelinek  (jakub@redhat.com)
+ * Copyright (C) 1998  Eddie C. Dost  (ecd@skynet.be)
+ * Copyright (C) 2001,2002  Andi Kleen, SuSE Labs
+ * Copyright (C) 2003       Pavel Machek (pavel@ucw.cz)
+ * Copyright (C) 2005       Philippe De Muyter (phdm@macqel.be)
+ * Copyright (C) 2008       Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ * These routines maintain argument size conversion between 32bit and 64bit
+ * ioctls.
+ */
+
+#include <linux/compat.h>
+#include <linux/module.h>
+#include <linux/videodev2.h>
+#include <linux/v4l2-subdev.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-ioctl.h>
+
+/*
+ * Per-ioctl data copy handlers.
+ *
+ * Those come in pairs, with a get_v4l2_foo() and a put_v4l2_foo() routine,
+ * where "v4l2_foo" is the name of the V4L2 struct.
+ *
+ * They basically get two __user pointers, one with a 32-bits struct that
+ * came from the userspace call and a 64-bits struct, also allocated as
+ * userspace, but filled internally by do_video_ioctl().
+ *
+ * For ioctls that have pointers inside it, the functions will also
+ * receive an ancillary buffer with extra space, used to pass extra
+ * data to the routine.
+ */
+
+struct v4l2_window32 {
+	struct v4l2_rect        w;
+	__u32			field;	/* enum v4l2_field */
+	__u32			chromakey;
+	compat_caddr_t		clips; /* always NULL */
+	__u32			clipcount; /* always 0 */
+	compat_caddr_t		bitmap; /* always NULL */
+	__u8                    global_alpha;
+};
+
+static int get_v4l2_window32(struct v4l2_window *p64,
+			     struct v4l2_window32 __user *p32)
+{
+	struct v4l2_window32 w32;
+
+	if (copy_from_user(&w32, p32, sizeof(w32)))
+		return -EFAULT;
+
+	*p64 = (struct v4l2_window) {
+		.w		= w32.w,
+		.field		= w32.field,
+		.chromakey	= w32.chromakey,
+		.clips		= NULL,
+		.clipcount	= 0,
+		.bitmap		= NULL,
+		.global_alpha	= w32.global_alpha,
+	};
+
+	return 0;
+}
+
+static int put_v4l2_window32(struct v4l2_window *p64,
+			     struct v4l2_window32 __user *p32)
+{
+	struct v4l2_window32 w32;
+
+	memset(&w32, 0, sizeof(w32));
+	w32 = (struct v4l2_window32) {
+		.w		= p64->w,
+		.field		= p64->field,
+		.chromakey	= p64->chromakey,
+		.clips		= 0,
+		.clipcount	= 0,
+		.bitmap		= 0,
+		.global_alpha	= p64->global_alpha,
+	};
+
+	if (copy_to_user(p32, &w32, sizeof(w32)))
+		return -EFAULT;
+
+	return 0;
+}
+
+struct v4l2_format32 {
+	__u32	type;	/* enum v4l2_buf_type */
+	union {
+		struct v4l2_pix_format	pix;
+		struct v4l2_pix_format_mplane	pix_mp;
+		struct v4l2_window32	win;
+		struct v4l2_vbi_format	vbi;
+		struct v4l2_sliced_vbi_format	sliced;
+		struct v4l2_sdr_format	sdr;
+		struct v4l2_meta_format	meta;
+		__u8	raw_data[200];        /* user-defined */
+	} fmt;
+};
+
+/**
+ * struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument
+ * @index:	on return, index of the first created buffer
+ * @count:	entry: number of requested buffers,
+ *		return: number of created buffers
+ * @memory:	buffer memory type
+ * @format:	frame format, for which buffers are requested
+ * @capabilities: capabilities of this buffer type.
+ * @flags:	additional buffer management attributes (ignored unless the
+ *		queue has V4L2_BUF_CAP_SUPPORTS_MMAP_CACHE_HINTS capability and
+ *		configured for MMAP streaming I/O).
+ * @reserved:	future extensions
+ */
+struct v4l2_create_buffers32 {
+	__u32			index;
+	__u32			count;
+	__u32			memory;	/* enum v4l2_memory */
+	struct v4l2_format32	format;
+	__u32			capabilities;
+	__u32			flags;
+	__u32			reserved[6];
+};
+
+static int get_v4l2_format32(struct v4l2_format *p64,
+			     struct v4l2_format32 __user *p32)
+{
+	if (get_user(p64->type, &p32->type))
+		return -EFAULT;
+
+	switch (p64->type) {
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+		return copy_from_user(&p64->fmt.pix, &p32->fmt.pix,
+				      sizeof(p64->fmt.pix)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		return copy_from_user(&p64->fmt.pix_mp, &p32->fmt.pix_mp,
+				      sizeof(p64->fmt.pix_mp)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
+		return get_v4l2_window32(&p64->fmt.win, &p32->fmt.win);
+	case V4L2_BUF_TYPE_VBI_CAPTURE:
+	case V4L2_BUF_TYPE_VBI_OUTPUT:
+		return copy_from_user(&p64->fmt.vbi, &p32->fmt.vbi,
+				      sizeof(p64->fmt.vbi)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
+	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
+		return copy_from_user(&p64->fmt.sliced, &p32->fmt.sliced,
+				      sizeof(p64->fmt.sliced)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_SDR_CAPTURE:
+	case V4L2_BUF_TYPE_SDR_OUTPUT:
+		return copy_from_user(&p64->fmt.sdr, &p32->fmt.sdr,
+				      sizeof(p64->fmt.sdr)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_META_CAPTURE:
+	case V4L2_BUF_TYPE_META_OUTPUT:
+		return copy_from_user(&p64->fmt.meta, &p32->fmt.meta,
+				      sizeof(p64->fmt.meta)) ? -EFAULT : 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int get_v4l2_create32(struct v4l2_create_buffers *p64,
+			     struct v4l2_create_buffers32 __user *p32)
+{
+	if (copy_from_user(p64, p32,
+			   offsetof(struct v4l2_create_buffers32, format)))
+		return -EFAULT;
+	if (copy_from_user(&p64->flags, &p32->flags, sizeof(p32->flags)))
+		return -EFAULT;
+	return get_v4l2_format32(&p64->format, &p32->format);
+}
+
+static int put_v4l2_format32(struct v4l2_format *p64,
+			     struct v4l2_format32 __user *p32)
+{
+	switch (p64->type) {
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
+		return copy_to_user(&p32->fmt.pix, &p64->fmt.pix,
+				    sizeof(p64->fmt.pix)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
+		return copy_to_user(&p32->fmt.pix_mp, &p64->fmt.pix_mp,
+				    sizeof(p64->fmt.pix_mp)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
+	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
+		return put_v4l2_window32(&p64->fmt.win, &p32->fmt.win);
+	case V4L2_BUF_TYPE_VBI_CAPTURE:
+	case V4L2_BUF_TYPE_VBI_OUTPUT:
+		return copy_to_user(&p32->fmt.vbi, &p64->fmt.vbi,
+				    sizeof(p64->fmt.vbi)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
+	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
+		return copy_to_user(&p32->fmt.sliced, &p64->fmt.sliced,
+				    sizeof(p64->fmt.sliced)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_SDR_CAPTURE:
+	case V4L2_BUF_TYPE_SDR_OUTPUT:
+		return copy_to_user(&p32->fmt.sdr, &p64->fmt.sdr,
+				    sizeof(p64->fmt.sdr)) ? -EFAULT : 0;
+	case V4L2_BUF_TYPE_META_CAPTURE:
+	case V4L2_BUF_TYPE_META_OUTPUT:
+		return copy_to_user(&p32->fmt.meta, &p64->fmt.meta,
+				    sizeof(p64->fmt.meta)) ? -EFAULT : 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int put_v4l2_create32(struct v4l2_create_buffers *p64,
+			     struct v4l2_create_buffers32 __user *p32)
+{
+	if (copy_to_user(p32, p64,
+			 offsetof(struct v4l2_create_buffers32, format)) ||
+	    put_user(p64->capabilities, &p32->capabilities) ||
+	    put_user(p64->flags, &p32->flags) ||
+	    copy_to_user(p32->reserved, p64->reserved, sizeof(p64->reserved)))
+		return -EFAULT;
+	return put_v4l2_format32(&p64->format, &p32->format);
+}
+
+struct v4l2_standard32 {
+	__u32		     index;
+	compat_u64	     id;
+	__u8		     name[24];
+	struct v4l2_fract    frameperiod; /* Frames, not fields */
+	__u32		     framelines;
+	__u32		     reserved[4];
+};
+
+static int get_v4l2_standard32(struct v4l2_standard *p64,
+			       struct v4l2_standard32 __user *p32)
+{
+	/* other fields are not set by the user, nor used by the driver */
+	return get_user(p64->index, &p32->index);
+}
+
+static int put_v4l2_standard32(struct v4l2_standard *p64,
+			       struct v4l2_standard32 __user *p32)
+{
+	if (put_user(p64->index, &p32->index) ||
+	    put_user(p64->id, &p32->id) ||
+	    copy_to_user(p32->name, p64->name, sizeof(p32->name)) ||
+	    copy_to_user(&p32->frameperiod, &p64->frameperiod,
+			 sizeof(p32->frameperiod)) ||
+	    put_user(p64->framelines, &p32->framelines) ||
+	    copy_to_user(p32->reserved, p64->reserved, sizeof(p32->reserved)))
+		return -EFAULT;
+	return 0;
+}
+
+struct v4l2_plane32 {
+	__u32			bytesused;
+	__u32			length;
+	union {
+		__u32		mem_offset;
+		compat_long_t	userptr;
+		__s32		fd;
+	} m;
+	__u32			data_offset;
+	__u32			reserved[11];
+};
+
+/*
+ * This is correct for all architectures including i386, but not x32,
+ * which has different alignment requirements for timestamp
+ */
+struct v4l2_buffer32 {
+	__u32			index;
+	__u32			type;	/* enum v4l2_buf_type */
+	__u32			bytesused;
+	__u32			flags;
+	__u32			field;	/* enum v4l2_field */
+	struct {
+		compat_s64	tv_sec;
+		compat_s64	tv_usec;
+	}			timestamp;
+	struct v4l2_timecode	timecode;
+	__u32			sequence;
+
+	/* memory location */
+	__u32			memory;	/* enum v4l2_memory */
+	union {
+		__u32           offset;
+		compat_long_t   userptr;
+		compat_caddr_t  planes;
+		__s32		fd;
+	} m;
+	__u32			length;
+	__u32			reserved2;
+	__s32			request_fd;
+};
+
+#ifdef CONFIG_COMPAT_32BIT_TIME
+struct v4l2_buffer32_time32 {
+	__u32			index;
+	__u32			type;	/* enum v4l2_buf_type */
+	__u32			bytesused;
+	__u32			flags;
+	__u32			field;	/* enum v4l2_field */
+	struct old_timeval32	timestamp;
+	struct v4l2_timecode	timecode;
+	__u32			sequence;
+
+	/* memory location */
+	__u32			memory;	/* enum v4l2_memory */
+	union {
+		__u32           offset;
+		compat_long_t   userptr;
+		compat_caddr_t  planes;
+		__s32		fd;
+	} m;
+	__u32			length;
+	__u32			reserved2;
+	__s32			request_fd;
+};
+#endif
+
+static int get_v4l2_plane32(struct v4l2_plane *p64,
+			    struct v4l2_plane32 __user *p32,
+			    enum v4l2_memory memory)
+{
+	struct v4l2_plane32 plane32;
+	typeof(p64->m) m = {};
+
+	if (copy_from_user(&plane32, p32, sizeof(plane32)))
+		return -EFAULT;
+
+	switch (memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		m.mem_offset = plane32.m.mem_offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		m.userptr = (unsigned long)compat_ptr(plane32.m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		m.fd = plane32.m.fd;
+		break;
+	}
+
+	memset(p64, 0, sizeof(*p64));
+	*p64 = (struct v4l2_plane) {
+		.bytesused	= plane32.bytesused,
+		.length		= plane32.length,
+		.m		= m,
+		.data_offset	= plane32.data_offset,
+	};
+
+	return 0;
+}
+
+static int put_v4l2_plane32(struct v4l2_plane *p64,
+			    struct v4l2_plane32 __user *p32,
+			    enum v4l2_memory memory)
+{
+	struct v4l2_plane32 plane32;
+
+	memset(&plane32, 0, sizeof(plane32));
+	plane32 = (struct v4l2_plane32) {
+		.bytesused	= p64->bytesused,
+		.length		= p64->length,
+		.data_offset	= p64->data_offset,
+	};
+
+	switch (memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		plane32.m.mem_offset = p64->m.mem_offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		plane32.m.userptr = (uintptr_t)(p64->m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		plane32.m.fd = p64->m.fd;
+		break;
+	}
+
+	if (copy_to_user(p32, &plane32, sizeof(plane32)))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int get_v4l2_buffer32(struct v4l2_buffer *vb,
+			     struct v4l2_buffer32 __user *arg)
+{
+	struct v4l2_buffer32 vb32;
+
+	if (copy_from_user(&vb32, arg, sizeof(vb32)))
+		return -EFAULT;
+
+	memset(vb, 0, sizeof(*vb));
+	*vb = (struct v4l2_buffer) {
+		.index		= vb32.index,
+		.type		= vb32.type,
+		.bytesused	= vb32.bytesused,
+		.flags		= vb32.flags,
+		.field		= vb32.field,
+		.timestamp.tv_sec	= vb32.timestamp.tv_sec,
+		.timestamp.tv_usec	= vb32.timestamp.tv_usec,
+		.timecode	= vb32.timecode,
+		.sequence	= vb32.sequence,
+		.memory		= vb32.memory,
+		.m.offset	= vb32.m.offset,
+		.length		= vb32.length,
+		.request_fd	= vb32.request_fd,
+	};
+
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		vb->m.offset = vb32.m.offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		vb->m.userptr = (unsigned long)compat_ptr(vb32.m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		vb->m.fd = vb32.m.fd;
+		break;
+	}
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
+		vb->m.planes = (void __force *)
+				compat_ptr(vb32.m.planes);
+
+	return 0;
+}
+
+#ifdef CONFIG_COMPAT_32BIT_TIME
+static int get_v4l2_buffer32_time32(struct v4l2_buffer *vb,
+				    struct v4l2_buffer32_time32 __user *arg)
+{
+	struct v4l2_buffer32_time32 vb32;
+
+	if (copy_from_user(&vb32, arg, sizeof(vb32)))
+		return -EFAULT;
+
+	*vb = (struct v4l2_buffer) {
+		.index		= vb32.index,
+		.type		= vb32.type,
+		.bytesused	= vb32.bytesused,
+		.flags		= vb32.flags,
+		.field		= vb32.field,
+		.timestamp.tv_sec	= vb32.timestamp.tv_sec,
+		.timestamp.tv_usec	= vb32.timestamp.tv_usec,
+		.timecode	= vb32.timecode,
+		.sequence	= vb32.sequence,
+		.memory		= vb32.memory,
+		.m.offset	= vb32.m.offset,
+		.length		= vb32.length,
+		.request_fd	= vb32.request_fd,
+	};
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		vb->m.offset = vb32.m.offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		vb->m.userptr = (unsigned long)compat_ptr(vb32.m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		vb->m.fd = vb32.m.fd;
+		break;
+	}
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
+		vb->m.planes = (void __force *)
+				compat_ptr(vb32.m.planes);
+
+	return 0;
+}
+#endif
+
+static int put_v4l2_buffer32(struct v4l2_buffer *vb,
+			     struct v4l2_buffer32 __user *arg)
+{
+	struct v4l2_buffer32 vb32;
+
+	memset(&vb32, 0, sizeof(vb32));
+	vb32 = (struct v4l2_buffer32) {
+		.index		= vb->index,
+		.type		= vb->type,
+		.bytesused	= vb->bytesused,
+		.flags		= vb->flags,
+		.field		= vb->field,
+		.timestamp.tv_sec	= vb->timestamp.tv_sec,
+		.timestamp.tv_usec	= vb->timestamp.tv_usec,
+		.timecode	= vb->timecode,
+		.sequence	= vb->sequence,
+		.memory		= vb->memory,
+		.m.offset	= vb->m.offset,
+		.length		= vb->length,
+		.request_fd	= vb->request_fd,
+	};
+
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		vb32.m.offset = vb->m.offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		vb32.m.userptr = (uintptr_t)(vb->m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		vb32.m.fd = vb->m.fd;
+		break;
+	}
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
+		vb32.m.planes = (uintptr_t)vb->m.planes;
+
+	if (copy_to_user(arg, &vb32, sizeof(vb32)))
+		return -EFAULT;
+
+	return 0;
+}
+
+#ifdef CONFIG_COMPAT_32BIT_TIME
+static int put_v4l2_buffer32_time32(struct v4l2_buffer *vb,
+				    struct v4l2_buffer32_time32 __user *arg)
+{
+	struct v4l2_buffer32_time32 vb32;
+
+	memset(&vb32, 0, sizeof(vb32));
+	vb32 = (struct v4l2_buffer32_time32) {
+		.index		= vb->index,
+		.type		= vb->type,
+		.bytesused	= vb->bytesused,
+		.flags		= vb->flags,
+		.field		= vb->field,
+		.timestamp.tv_sec	= vb->timestamp.tv_sec,
+		.timestamp.tv_usec	= vb->timestamp.tv_usec,
+		.timecode	= vb->timecode,
+		.sequence	= vb->sequence,
+		.memory		= vb->memory,
+		.m.offset	= vb->m.offset,
+		.length		= vb->length,
+		.request_fd	= vb->request_fd,
+	};
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+	case V4L2_MEMORY_OVERLAY:
+		vb32.m.offset = vb->m.offset;
+		break;
+	case V4L2_MEMORY_USERPTR:
+		vb32.m.userptr = (uintptr_t)(vb->m.userptr);
+		break;
+	case V4L2_MEMORY_DMABUF:
+		vb32.m.fd = vb->m.fd;
+		break;
+	}
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(vb->type))
+		vb32.m.planes = (uintptr_t)vb->m.planes;
+
+	if (copy_to_user(arg, &vb32, sizeof(vb32)))
+		return -EFAULT;
+
+	return 0;
+}
+#endif
+
+struct v4l2_framebuffer32 {
+	__u32			capability;
+	__u32			flags;
+	compat_caddr_t		base;
+	struct {
+		__u32		width;
+		__u32		height;
+		__u32		pixelformat;
+		__u32		field;
+		__u32		bytesperline;
+		__u32		sizeimage;
+		__u32		colorspace;
+		__u32		priv;
+	} fmt;
+};
+
+static int get_v4l2_framebuffer32(struct v4l2_framebuffer *p64,
+				  struct v4l2_framebuffer32 __user *p32)
+{
+	if (get_user(p64->capability, &p32->capability) ||
+	    get_user(p64->flags, &p32->flags) ||
+	    copy_from_user(&p64->fmt, &p32->fmt, sizeof(p64->fmt)))
+		return -EFAULT;
+	p64->base = NULL;
+
+	return 0;
+}
+
+static int put_v4l2_framebuffer32(struct v4l2_framebuffer *p64,
+				  struct v4l2_framebuffer32 __user *p32)
+{
+	if (put_user((uintptr_t)p64->base, &p32->base) ||
+	    put_user(p64->capability, &p32->capability) ||
+	    put_user(p64->flags, &p32->flags) ||
+	    copy_to_user(&p32->fmt, &p64->fmt, sizeof(p64->fmt)))
+		return -EFAULT;
+
+	return 0;
+}
+
+struct v4l2_input32 {
+	__u32	     index;		/*  Which input */
+	__u8	     name[32];		/*  Label */
+	__u32	     type;		/*  Type of input */
+	__u32	     audioset;		/*  Associated audios (bitfield) */
+	__u32        tuner;             /*  Associated tuner */
+	compat_u64   std;
+	__u32	     status;
+	__u32	     capabilities;
+	__u32	     reserved[3];
+};
+
+/*
+ * The 64-bit v4l2_input struct has extra padding at the end of the struct.
+ * Otherwise it is identical to the 32-bit version.
+ */
+static inline int get_v4l2_input32(struct v4l2_input *p64,
+				   struct v4l2_input32 __user *p32)
+{
+	if (copy_from_user(p64, p32, sizeof(*p32)))
+		return -EFAULT;
+	return 0;
+}
+
+static inline int put_v4l2_input32(struct v4l2_input *p64,
+				   struct v4l2_input32 __user *p32)
+{
+	if (copy_to_user(p32, p64, sizeof(*p32)))
+		return -EFAULT;
+	return 0;
+}
+
+struct v4l2_ext_controls32 {
+	__u32 which;
+	__u32 count;
+	__u32 error_idx;
+	__s32 request_fd;
+	__u32 reserved[1];
+	compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */
+};
+
+struct v4l2_ext_control32 {
+	__u32 id;
+	__u32 size;
+	__u32 reserved2[1];
+	union {
+		__s32 value;
+		__s64 value64;
+		compat_caddr_t string; /* actually char * */
+	};
+} __attribute__ ((packed));
+
+/* Return true if this control is a pointer type. */
+static inline bool ctrl_is_pointer(struct file *file, u32 id)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct v4l2_fh *fh = NULL;
+	struct v4l2_ctrl_handler *hdl = NULL;
+	struct v4l2_query_ext_ctrl qec = { id };
+	const struct v4l2_ioctl_ops *ops = vdev->ioctl_ops;
+
+	if (test_bit(V4L2_FL_USES_V4L2_FH, &vdev->flags))
+		fh = file->private_data;
+
+	if (fh && fh->ctrl_handler)
+		hdl = fh->ctrl_handler;
+	else if (vdev->ctrl_handler)
+		hdl = vdev->ctrl_handler;
+
+	if (hdl) {
+		struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, id);
+
+		return ctrl && ctrl->is_ptr;
+	}
+
+	if (!ops || !ops->vidioc_query_ext_ctrl)
+		return false;
+
+	return !ops->vidioc_query_ext_ctrl(file, fh, &qec) &&
+		(qec.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD);
+}
+
+static int get_v4l2_ext_controls32(struct v4l2_ext_controls *p64,
+				   struct v4l2_ext_controls32 __user *p32)
+{
+	struct v4l2_ext_controls32 ec32;
+
+	if (copy_from_user(&ec32, p32, sizeof(ec32)))
+		return -EFAULT;
+
+	*p64 = (struct v4l2_ext_controls) {
+		.which		= ec32.which,
+		.count		= ec32.count,
+		.error_idx	= ec32.error_idx,
+		.request_fd	= ec32.request_fd,
+		.reserved[0]	= ec32.reserved[0],
+		.controls	= (void __force *)compat_ptr(ec32.controls),
+	};
+
+	return 0;
+}
+
+static int put_v4l2_ext_controls32(struct v4l2_ext_controls *p64,
+				   struct v4l2_ext_controls32 __user *p32)
+{
+	struct v4l2_ext_controls32 ec32;
+
+	memset(&ec32, 0, sizeof(ec32));
+	ec32 = (struct v4l2_ext_controls32) {
+		.which		= p64->which,
+		.count		= p64->count,
+		.error_idx	= p64->error_idx,
+		.request_fd	= p64->request_fd,
+		.reserved[0]	= p64->reserved[0],
+		.controls	= (uintptr_t)p64->controls,
+	};
+
+	if (copy_to_user(p32, &ec32, sizeof(ec32)))
+		return -EFAULT;
+
+	return 0;
+}
+
+#ifdef CONFIG_X86_64
+/*
+ * x86 is the only compat architecture with different struct alignment
+ * between 32-bit and 64-bit tasks.
+ */
+struct v4l2_event32 {
+	__u32				type;
+	union {
+		compat_s64		value64;
+		__u8			data[64];
+	} u;
+	__u32				pending;
+	__u32				sequence;
+	struct {
+		compat_s64		tv_sec;
+		compat_s64		tv_nsec;
+	} timestamp;
+	__u32				id;
+	__u32				reserved[8];
+};
+
+static int put_v4l2_event32(struct v4l2_event *p64,
+			    struct v4l2_event32 __user *p32)
+{
+	if (put_user(p64->type, &p32->type) ||
+	    copy_to_user(&p32->u, &p64->u, sizeof(p64->u)) ||
+	    put_user(p64->pending, &p32->pending) ||
+	    put_user(p64->sequence, &p32->sequence) ||
+	    put_user(p64->timestamp.tv_sec, &p32->timestamp.tv_sec) ||
+	    put_user(p64->timestamp.tv_nsec, &p32->timestamp.tv_nsec) ||
+	    put_user(p64->id, &p32->id) ||
+	    copy_to_user(p32->reserved, p64->reserved, sizeof(p32->reserved)))
+		return -EFAULT;
+	return 0;
+}
+
+#endif
+
+#ifdef CONFIG_COMPAT_32BIT_TIME
+struct v4l2_event32_time32 {
+	__u32				type;
+	union {
+		compat_s64		value64;
+		__u8			data[64];
+	} u;
+	__u32				pending;
+	__u32				sequence;
+	struct old_timespec32		timestamp;
+	__u32				id;
+	__u32				reserved[8];
+};
+
+static int put_v4l2_event32_time32(struct v4l2_event *p64,
+				   struct v4l2_event32_time32 __user *p32)
+{
+	if (put_user(p64->type, &p32->type) ||
+	    copy_to_user(&p32->u, &p64->u, sizeof(p64->u)) ||
+	    put_user(p64->pending, &p32->pending) ||
+	    put_user(p64->sequence, &p32->sequence) ||
+	    put_user(p64->timestamp.tv_sec, &p32->timestamp.tv_sec) ||
+	    put_user(p64->timestamp.tv_nsec, &p32->timestamp.tv_nsec) ||
+	    put_user(p64->id, &p32->id) ||
+	    copy_to_user(p32->reserved, p64->reserved, sizeof(p32->reserved)))
+		return -EFAULT;
+	return 0;
+}
+#endif
+
+struct v4l2_edid32 {
+	__u32 pad;
+	__u32 start_block;
+	__u32 blocks;
+	__u32 reserved[5];
+	compat_caddr_t edid;
+};
+
+static int get_v4l2_edid32(struct v4l2_edid *p64,
+			   struct v4l2_edid32 __user *p32)
+{
+	compat_uptr_t edid;
+
+	if (copy_from_user(p64, p32, offsetof(struct v4l2_edid32, edid)) ||
+	    get_user(edid, &p32->edid))
+		return -EFAULT;
+
+	p64->edid = (void __force *)compat_ptr(edid);
+	return 0;
+}
+
+static int put_v4l2_edid32(struct v4l2_edid *p64,
+			   struct v4l2_edid32 __user *p32)
+{
+	if (copy_to_user(p32, p64, offsetof(struct v4l2_edid32, edid)))
+		return -EFAULT;
+	return 0;
+}
+
+/*
+ * List of ioctls that require 32-bits/64-bits conversion
+ *
+ * The V4L2 ioctls that aren't listed there don't have pointer arguments
+ * and the struct size is identical for both 32 and 64 bits versions, so
+ * they don't need translations.
+ */
+
+#define VIDIOC_G_FMT32		_IOWR('V',  4, struct v4l2_format32)
+#define VIDIOC_S_FMT32		_IOWR('V',  5, struct v4l2_format32)
+#define VIDIOC_QUERYBUF32	_IOWR('V',  9, struct v4l2_buffer32)
+#define VIDIOC_G_FBUF32		_IOR ('V', 10, struct v4l2_framebuffer32)
+#define VIDIOC_S_FBUF32		_IOW ('V', 11, struct v4l2_framebuffer32)
+#define VIDIOC_QBUF32		_IOWR('V', 15, struct v4l2_buffer32)
+#define VIDIOC_DQBUF32		_IOWR('V', 17, struct v4l2_buffer32)
+#define VIDIOC_ENUMSTD32	_IOWR('V', 25, struct v4l2_standard32)
+#define VIDIOC_ENUMINPUT32	_IOWR('V', 26, struct v4l2_input32)
+#define VIDIOC_G_EDID32		_IOWR('V', 40, struct v4l2_edid32)
+#define VIDIOC_S_EDID32		_IOWR('V', 41, struct v4l2_edid32)
+#define VIDIOC_TRY_FMT32	_IOWR('V', 64, struct v4l2_format32)
+#define VIDIOC_G_EXT_CTRLS32    _IOWR('V', 71, struct v4l2_ext_controls32)
+#define VIDIOC_S_EXT_CTRLS32    _IOWR('V', 72, struct v4l2_ext_controls32)
+#define VIDIOC_TRY_EXT_CTRLS32  _IOWR('V', 73, struct v4l2_ext_controls32)
+#define	VIDIOC_DQEVENT32	_IOR ('V', 89, struct v4l2_event32)
+#define VIDIOC_CREATE_BUFS32	_IOWR('V', 92, struct v4l2_create_buffers32)
+#define VIDIOC_PREPARE_BUF32	_IOWR('V', 93, struct v4l2_buffer32)
+
+#ifdef CONFIG_COMPAT_32BIT_TIME
+#define VIDIOC_QUERYBUF32_TIME32	_IOWR('V',  9, struct v4l2_buffer32_time32)
+#define VIDIOC_QBUF32_TIME32		_IOWR('V', 15, struct v4l2_buffer32_time32)
+#define VIDIOC_DQBUF32_TIME32		_IOWR('V', 17, struct v4l2_buffer32_time32)
+#define	VIDIOC_DQEVENT32_TIME32		_IOR ('V', 89, struct v4l2_event32_time32)
+#define VIDIOC_PREPARE_BUF32_TIME32	_IOWR('V', 93, struct v4l2_buffer32_time32)
+#endif
+
+unsigned int v4l2_compat_translate_cmd(unsigned int cmd)
+{
+	switch (cmd) {
+	case VIDIOC_G_FMT32:
+		return VIDIOC_G_FMT;
+	case VIDIOC_S_FMT32:
+		return VIDIOC_S_FMT;
+	case VIDIOC_TRY_FMT32:
+		return VIDIOC_TRY_FMT;
+	case VIDIOC_G_FBUF32:
+		return VIDIOC_G_FBUF;
+	case VIDIOC_S_FBUF32:
+		return VIDIOC_S_FBUF;
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_QUERYBUF32_TIME32:
+		return VIDIOC_QUERYBUF;
+	case VIDIOC_QBUF32_TIME32:
+		return VIDIOC_QBUF;
+	case VIDIOC_DQBUF32_TIME32:
+		return VIDIOC_DQBUF;
+	case VIDIOC_PREPARE_BUF32_TIME32:
+		return VIDIOC_PREPARE_BUF;
+#endif
+	case VIDIOC_QUERYBUF32:
+		return VIDIOC_QUERYBUF;
+	case VIDIOC_QBUF32:
+		return VIDIOC_QBUF;
+	case VIDIOC_DQBUF32:
+		return VIDIOC_DQBUF;
+	case VIDIOC_CREATE_BUFS32:
+		return VIDIOC_CREATE_BUFS;
+	case VIDIOC_G_EXT_CTRLS32:
+		return VIDIOC_G_EXT_CTRLS;
+	case VIDIOC_S_EXT_CTRLS32:
+		return VIDIOC_S_EXT_CTRLS;
+	case VIDIOC_TRY_EXT_CTRLS32:
+		return VIDIOC_TRY_EXT_CTRLS;
+	case VIDIOC_PREPARE_BUF32:
+		return VIDIOC_PREPARE_BUF;
+	case VIDIOC_ENUMSTD32:
+		return VIDIOC_ENUMSTD;
+	case VIDIOC_ENUMINPUT32:
+		return VIDIOC_ENUMINPUT;
+	case VIDIOC_G_EDID32:
+		return VIDIOC_G_EDID;
+	case VIDIOC_S_EDID32:
+		return VIDIOC_S_EDID;
+#ifdef CONFIG_X86_64
+	case VIDIOC_DQEVENT32:
+		return VIDIOC_DQEVENT;
+#endif
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_DQEVENT32_TIME32:
+		return VIDIOC_DQEVENT;
+#endif
+	}
+	return cmd;
+}
+
+int v4l2_compat_get_user(void __user *arg, void *parg, unsigned int cmd)
+{
+	switch (cmd) {
+	case VIDIOC_G_FMT32:
+	case VIDIOC_S_FMT32:
+	case VIDIOC_TRY_FMT32:
+		return get_v4l2_format32(parg, arg);
+
+	case VIDIOC_S_FBUF32:
+		return get_v4l2_framebuffer32(parg, arg);
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_QUERYBUF32_TIME32:
+	case VIDIOC_QBUF32_TIME32:
+	case VIDIOC_DQBUF32_TIME32:
+	case VIDIOC_PREPARE_BUF32_TIME32:
+		return get_v4l2_buffer32_time32(parg, arg);
+#endif
+	case VIDIOC_QUERYBUF32:
+	case VIDIOC_QBUF32:
+	case VIDIOC_DQBUF32:
+	case VIDIOC_PREPARE_BUF32:
+		return get_v4l2_buffer32(parg, arg);
+
+	case VIDIOC_G_EXT_CTRLS32:
+	case VIDIOC_S_EXT_CTRLS32:
+	case VIDIOC_TRY_EXT_CTRLS32:
+		return get_v4l2_ext_controls32(parg, arg);
+
+	case VIDIOC_CREATE_BUFS32:
+		return get_v4l2_create32(parg, arg);
+
+	case VIDIOC_ENUMSTD32:
+		return get_v4l2_standard32(parg, arg);
+
+	case VIDIOC_ENUMINPUT32:
+		return get_v4l2_input32(parg, arg);
+
+	case VIDIOC_G_EDID32:
+	case VIDIOC_S_EDID32:
+		return get_v4l2_edid32(parg, arg);
+	}
+	return 0;
+}
+
+int v4l2_compat_put_user(void __user *arg, void *parg, unsigned int cmd)
+{
+	switch (cmd) {
+	case VIDIOC_G_FMT32:
+	case VIDIOC_S_FMT32:
+	case VIDIOC_TRY_FMT32:
+		return put_v4l2_format32(parg, arg);
+
+	case VIDIOC_G_FBUF32:
+		return put_v4l2_framebuffer32(parg, arg);
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_QUERYBUF32_TIME32:
+	case VIDIOC_QBUF32_TIME32:
+	case VIDIOC_DQBUF32_TIME32:
+	case VIDIOC_PREPARE_BUF32_TIME32:
+		return put_v4l2_buffer32_time32(parg, arg);
+#endif
+	case VIDIOC_QUERYBUF32:
+	case VIDIOC_QBUF32:
+	case VIDIOC_DQBUF32:
+	case VIDIOC_PREPARE_BUF32:
+		return put_v4l2_buffer32(parg, arg);
+
+	case VIDIOC_G_EXT_CTRLS32:
+	case VIDIOC_S_EXT_CTRLS32:
+	case VIDIOC_TRY_EXT_CTRLS32:
+		return put_v4l2_ext_controls32(parg, arg);
+
+	case VIDIOC_CREATE_BUFS32:
+		return put_v4l2_create32(parg, arg);
+
+	case VIDIOC_ENUMSTD32:
+		return put_v4l2_standard32(parg, arg);
+
+	case VIDIOC_ENUMINPUT32:
+		return put_v4l2_input32(parg, arg);
+
+	case VIDIOC_G_EDID32:
+	case VIDIOC_S_EDID32:
+		return put_v4l2_edid32(parg, arg);
+#ifdef CONFIG_X86_64
+	case VIDIOC_DQEVENT32:
+		return put_v4l2_event32(parg, arg);
+#endif
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_DQEVENT32_TIME32:
+		return put_v4l2_event32_time32(parg, arg);
+#endif
+	}
+	return 0;
+}
+
+int v4l2_compat_get_array_args(struct file *file, void *mbuf,
+			       void __user *user_ptr, size_t array_size,
+			       unsigned int cmd, void *arg)
+{
+	int err = 0;
+
+	memset(mbuf, 0, array_size);
+
+	switch (cmd) {
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_QUERYBUF32_TIME32:
+	case VIDIOC_QBUF32_TIME32:
+	case VIDIOC_DQBUF32_TIME32:
+	case VIDIOC_PREPARE_BUF32_TIME32:
+#endif
+	case VIDIOC_QUERYBUF32:
+	case VIDIOC_QBUF32:
+	case VIDIOC_DQBUF32:
+	case VIDIOC_PREPARE_BUF32: {
+		struct v4l2_buffer *b64 = arg;
+		struct v4l2_plane *p64 = mbuf;
+		struct v4l2_plane32 __user *p32 = user_ptr;
+
+		if (V4L2_TYPE_IS_MULTIPLANAR(b64->type)) {
+			u32 num_planes = b64->length;
+
+			if (num_planes == 0)
+				return 0;
+
+			while (num_planes--) {
+				err = get_v4l2_plane32(p64, p32, b64->memory);
+				if (err)
+					return err;
+				++p64;
+				++p32;
+			}
+		}
+		break;
+	}
+	case VIDIOC_G_EXT_CTRLS32:
+	case VIDIOC_S_EXT_CTRLS32:
+	case VIDIOC_TRY_EXT_CTRLS32: {
+		struct v4l2_ext_controls *ecs64 = arg;
+		struct v4l2_ext_control *ec64 = mbuf;
+		struct v4l2_ext_control32 __user *ec32 = user_ptr;
+		int n;
+
+		for (n = 0; n < ecs64->count; n++) {
+			if (copy_from_user(ec64, ec32, sizeof(*ec32)))
+				return -EFAULT;
+
+			if (ctrl_is_pointer(file, ec64->id)) {
+				compat_uptr_t p;
+
+				if (get_user(p, &ec32->string))
+					return -EFAULT;
+				ec64->string = compat_ptr(p);
+			}
+			ec32++;
+			ec64++;
+		}
+		break;
+	}
+	default:
+		if (copy_from_user(mbuf, user_ptr, array_size))
+			err = -EFAULT;
+		break;
+	}
+
+	return err;
+}
+
+int v4l2_compat_put_array_args(struct file *file, void __user *user_ptr,
+			       void *mbuf, size_t array_size,
+			       unsigned int cmd, void *arg)
+{
+	int err = 0;
+
+	switch (cmd) {
+#ifdef CONFIG_COMPAT_32BIT_TIME
+	case VIDIOC_QUERYBUF32_TIME32:
+	case VIDIOC_QBUF32_TIME32:
+	case VIDIOC_DQBUF32_TIME32:
+	case VIDIOC_PREPARE_BUF32_TIME32:
+#endif
+	case VIDIOC_QUERYBUF32:
+	case VIDIOC_QBUF32:
+	case VIDIOC_DQBUF32:
+	case VIDIOC_PREPARE_BUF32: {
+		struct v4l2_buffer *b64 = arg;
+		struct v4l2_plane *p64 = mbuf;
+		struct v4l2_plane32 __user *p32 = user_ptr;
+
+		if (V4L2_TYPE_IS_MULTIPLANAR(b64->type)) {
+			u32 num_planes = b64->length;
+
+			if (num_planes == 0)
+				return 0;
+
+			while (num_planes--) {
+				err = put_v4l2_plane32(p64, p32, b64->memory);
+				if (err)
+					return err;
+				++p64;
+				++p32;
+			}
+		}
+		break;
+	}
+	case VIDIOC_G_EXT_CTRLS32:
+	case VIDIOC_S_EXT_CTRLS32:
+	case VIDIOC_TRY_EXT_CTRLS32: {
+		struct v4l2_ext_controls *ecs64 = arg;
+		struct v4l2_ext_control *ec64 = mbuf;
+		struct v4l2_ext_control32 __user *ec32 = user_ptr;
+		int n;
+
+		for (n = 0; n < ecs64->count; n++) {
+			unsigned int size = sizeof(*ec32);
+			/*
+			 * Do not modify the pointer when copying a pointer
+			 * control.  The contents of the pointer was changed,
+			 * not the pointer itself.
+			 * The structures are otherwise compatible.
+			 */
+			if (ctrl_is_pointer(file, ec64->id))
+				size -= sizeof(ec32->value64);
+
+			if (copy_to_user(ec32, ec64, size))
+				return -EFAULT;
+
+			ec32++;
+			ec64++;
+		}
+		break;
+	}
+	default:
+		if (copy_to_user(user_ptr, mbuf, array_size))
+			err = -EFAULT;
+		break;
+	}
+
+	return err;
+}
+
+/**
+ * v4l2_compat_ioctl32() - Handles a compat32 ioctl call
+ *
+ * @file: pointer to &struct file with the file handler
+ * @cmd: ioctl to be called
+ * @arg: arguments passed from/to the ioctl handler
+ *
+ * This function is meant to be used as .compat_ioctl fops at v4l2-dev.c
+ * in order to deal with 32-bit calls on a 64-bits Kernel.
+ *
+ * This function calls do_video_ioctl() for non-private V4L2 ioctls.
+ * If the function is a private one it calls vdev->fops->compat_ioctl32
+ * instead.
+ */
+long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct video_device *vdev = video_devdata(file);
+	long ret = -ENOIOCTLCMD;
+
+	if (!file->f_op->unlocked_ioctl)
+		return ret;
+
+	if (!video_is_registered(vdev))
+		return -ENODEV;
+
+	if (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE)
+		ret = file->f_op->unlocked_ioctl(file, cmd,
+					(unsigned long)compat_ptr(arg));
+	else if (vdev->fops->compat_ioctl32)
+		ret = vdev->fops->compat_ioctl32(file, cmd, arg);
+
+	if (ret == -ENOIOCTLCMD)
+		pr_debug("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n",
+			 _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32);