Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 1557 insertions, 0 deletions

diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
new file mode 100644
index 000000000..f4d4c33b6
--- /dev/null
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -0,0 +1,1557 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *      uvc_v4l2.c  --  USB Video Class driver - V4L2 API
+ *
+ *      Copyright (C) 2005-2010
+ *          Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ */
+
+#include <linux/compat.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/videodev2.h>
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+#include <linux/wait.h>
+#include <linux/atomic.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+
+#include "uvcvideo.h"
+
+/* ------------------------------------------------------------------------
+ * UVC ioctls
+ */
+static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
+	struct uvc_xu_control_mapping *xmap)
+{
+	struct uvc_control_mapping *map;
+	unsigned int size;
+	int ret;
+
+	map = kzalloc(sizeof(*map), GFP_KERNEL);
+	if (map == NULL)
+		return -ENOMEM;
+
+	map->id = xmap->id;
+	/* Non standard control id. */
+	if (v4l2_ctrl_get_name(map->id) == NULL) {
+		if (xmap->name[0] == '\0') {
+			ret = -EINVAL;
+			goto free_map;
+		}
+		xmap->name[sizeof(xmap->name) - 1] = '\0';
+		map->name = xmap->name;
+	}
+	memcpy(map->entity, xmap->entity, sizeof(map->entity));
+	map->selector = xmap->selector;
+	map->size = xmap->size;
+	map->offset = xmap->offset;
+	map->v4l2_type = xmap->v4l2_type;
+	map->data_type = xmap->data_type;
+
+	switch (xmap->v4l2_type) {
+	case V4L2_CTRL_TYPE_INTEGER:
+	case V4L2_CTRL_TYPE_BOOLEAN:
+	case V4L2_CTRL_TYPE_BUTTON:
+		break;
+
+	case V4L2_CTRL_TYPE_MENU:
+		/*
+		 * Prevent excessive memory consumption, as well as integer
+		 * overflows.
+		 */
+		if (xmap->menu_count == 0 ||
+		    xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) {
+			ret = -EINVAL;
+			goto free_map;
+		}
+
+		size = xmap->menu_count * sizeof(*map->menu_info);
+		map->menu_info = memdup_user(xmap->menu_info, size);
+		if (IS_ERR(map->menu_info)) {
+			ret = PTR_ERR(map->menu_info);
+			goto free_map;
+		}
+
+		map->menu_count = xmap->menu_count;
+		break;
+
+	default:
+		uvc_dbg(chain->dev, CONTROL,
+			"Unsupported V4L2 control type %u\n", xmap->v4l2_type);
+		ret = -ENOTTY;
+		goto free_map;
+	}
+
+	ret = uvc_ctrl_add_mapping(chain, map);
+
+	kfree(map->menu_info);
+free_map:
+	kfree(map);
+
+	return ret;
+}
+
+/* ------------------------------------------------------------------------
+ * V4L2 interface
+ */
+
+/*
+ * Find the frame interval closest to the requested frame interval for the
+ * given frame format and size. This should be done by the device as part of
+ * the Video Probe and Commit negotiation, but some hardware don't implement
+ * that feature.
+ */
+static u32 uvc_try_frame_interval(struct uvc_frame *frame, u32 interval)
+{
+	unsigned int i;
+
+	if (frame->bFrameIntervalType) {
+		u32 best = -1, dist;
+
+		for (i = 0; i < frame->bFrameIntervalType; ++i) {
+			dist = interval > frame->dwFrameInterval[i]
+			     ? interval - frame->dwFrameInterval[i]
+			     : frame->dwFrameInterval[i] - interval;
+
+			if (dist > best)
+				break;
+
+			best = dist;
+		}
+
+		interval = frame->dwFrameInterval[i-1];
+	} else {
+		const u32 min = frame->dwFrameInterval[0];
+		const u32 max = frame->dwFrameInterval[1];
+		const u32 step = frame->dwFrameInterval[2];
+
+		interval = min + (interval - min + step/2) / step * step;
+		if (interval > max)
+			interval = max;
+	}
+
+	return interval;
+}
+
+static u32 uvc_v4l2_get_bytesperline(const struct uvc_format *format,
+	const struct uvc_frame *frame)
+{
+	switch (format->fcc) {
+	case V4L2_PIX_FMT_NV12:
+	case V4L2_PIX_FMT_YVU420:
+	case V4L2_PIX_FMT_YUV420:
+	case V4L2_PIX_FMT_M420:
+		return frame->wWidth;
+
+	default:
+		return format->bpp * frame->wWidth / 8;
+	}
+}
+
+static int uvc_v4l2_try_format(struct uvc_streaming *stream,
+	struct v4l2_format *fmt, struct uvc_streaming_control *probe,
+	struct uvc_format **uvc_format, struct uvc_frame **uvc_frame)
+{
+	struct uvc_format *format = NULL;
+	struct uvc_frame *frame = NULL;
+	u16 rw, rh;
+	unsigned int d, maxd;
+	unsigned int i;
+	u32 interval;
+	int ret = 0;
+	u8 *fcc;
+
+	if (fmt->type != stream->type)
+		return -EINVAL;
+
+	fcc = (u8 *)&fmt->fmt.pix.pixelformat;
+	uvc_dbg(stream->dev, FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u\n",
+		fmt->fmt.pix.pixelformat,
+		fcc[0], fcc[1], fcc[2], fcc[3],
+		fmt->fmt.pix.width, fmt->fmt.pix.height);
+
+	/*
+	 * Check if the hardware supports the requested format, use the default
+	 * format otherwise.
+	 */
+	for (i = 0; i < stream->nformats; ++i) {
+		format = &stream->format[i];
+		if (format->fcc == fmt->fmt.pix.pixelformat)
+			break;
+	}
+
+	if (i == stream->nformats) {
+		format = stream->def_format;
+		fmt->fmt.pix.pixelformat = format->fcc;
+	}
+
+	/*
+	 * Find the closest image size. The distance between image sizes is
+	 * the size in pixels of the non-overlapping regions between the
+	 * requested size and the frame-specified size.
+	 */
+	rw = fmt->fmt.pix.width;
+	rh = fmt->fmt.pix.height;
+	maxd = (unsigned int)-1;
+
+	for (i = 0; i < format->nframes; ++i) {
+		u16 w = format->frame[i].wWidth;
+		u16 h = format->frame[i].wHeight;
+
+		d = min(w, rw) * min(h, rh);
+		d = w*h + rw*rh - 2*d;
+		if (d < maxd) {
+			maxd = d;
+			frame = &format->frame[i];
+		}
+
+		if (maxd == 0)
+			break;
+	}
+
+	if (frame == NULL) {
+		uvc_dbg(stream->dev, FORMAT, "Unsupported size %ux%u\n",
+			fmt->fmt.pix.width, fmt->fmt.pix.height);
+		return -EINVAL;
+	}
+
+	/* Use the default frame interval. */
+	interval = frame->dwDefaultFrameInterval;
+	uvc_dbg(stream->dev, FORMAT,
+		"Using default frame interval %u.%u us (%u.%u fps)\n",
+		interval / 10, interval % 10, 10000000 / interval,
+		(100000000 / interval) % 10);
+
+	/* Set the format index, frame index and frame interval. */
+	memset(probe, 0, sizeof(*probe));
+	probe->bmHint = 1;	/* dwFrameInterval */
+	probe->bFormatIndex = format->index;
+	probe->bFrameIndex = frame->bFrameIndex;
+	probe->dwFrameInterval = uvc_try_frame_interval(frame, interval);
+	/*
+	 * Some webcams stall the probe control set request when the
+	 * dwMaxVideoFrameSize field is set to zero. The UVC specification
+	 * clearly states that the field is read-only from the host, so this
+	 * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by
+	 * the webcam to work around the problem.
+	 *
+	 * The workaround could probably be enabled for all webcams, so the
+	 * quirk can be removed if needed. It's currently useful to detect
+	 * webcam bugs and fix them before they hit the market (providing
+	 * developers test their webcams with the Linux driver as well as with
+	 * the Windows driver).
+	 */
+	mutex_lock(&stream->mutex);
+	if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS)
+		probe->dwMaxVideoFrameSize =
+			stream->ctrl.dwMaxVideoFrameSize;
+
+	/* Probe the device. */
+	ret = uvc_probe_video(stream, probe);
+	mutex_unlock(&stream->mutex);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * After the probe, update fmt with the values returned from
+	 * negotiation with the device. Some devices return invalid bFormatIndex
+	 * and bFrameIndex values, in which case we can only assume they have
+	 * accepted the requested format as-is.
+	 */
+	for (i = 0; i < stream->nformats; ++i) {
+		if (probe->bFormatIndex == stream->format[i].index) {
+			format = &stream->format[i];
+			break;
+		}
+	}
+
+	if (i == stream->nformats)
+		uvc_dbg(stream->dev, FORMAT,
+			"Unknown bFormatIndex %u, using default\n",
+			probe->bFormatIndex);
+
+	for (i = 0; i < format->nframes; ++i) {
+		if (probe->bFrameIndex == format->frame[i].bFrameIndex) {
+			frame = &format->frame[i];
+			break;
+		}
+	}
+
+	if (i == format->nframes)
+		uvc_dbg(stream->dev, FORMAT,
+			"Unknown bFrameIndex %u, using default\n",
+			probe->bFrameIndex);
+
+	fmt->fmt.pix.width = frame->wWidth;
+	fmt->fmt.pix.height = frame->wHeight;
+	fmt->fmt.pix.field = V4L2_FIELD_NONE;
+	fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame);
+	fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize;
+	fmt->fmt.pix.pixelformat = format->fcc;
+	fmt->fmt.pix.colorspace = format->colorspace;
+	fmt->fmt.pix.xfer_func = format->xfer_func;
+	fmt->fmt.pix.ycbcr_enc = format->ycbcr_enc;
+
+	if (uvc_format != NULL)
+		*uvc_format = format;
+	if (uvc_frame != NULL)
+		*uvc_frame = frame;
+
+	return ret;
+}
+
+static int uvc_v4l2_get_format(struct uvc_streaming *stream,
+	struct v4l2_format *fmt)
+{
+	struct uvc_format *format;
+	struct uvc_frame *frame;
+	int ret = 0;
+
+	if (fmt->type != stream->type)
+		return -EINVAL;
+
+	mutex_lock(&stream->mutex);
+	format = stream->cur_format;
+	frame = stream->cur_frame;
+
+	if (format == NULL || frame == NULL) {
+		ret = -EINVAL;
+		goto done;
+	}
+
+	fmt->fmt.pix.pixelformat = format->fcc;
+	fmt->fmt.pix.width = frame->wWidth;
+	fmt->fmt.pix.height = frame->wHeight;
+	fmt->fmt.pix.field = V4L2_FIELD_NONE;
+	fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame);
+	fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize;
+	fmt->fmt.pix.colorspace = format->colorspace;
+	fmt->fmt.pix.xfer_func = format->xfer_func;
+	fmt->fmt.pix.ycbcr_enc = format->ycbcr_enc;
+
+done:
+	mutex_unlock(&stream->mutex);
+	return ret;
+}
+
+static int uvc_v4l2_set_format(struct uvc_streaming *stream,
+	struct v4l2_format *fmt)
+{
+	struct uvc_streaming_control probe;
+	struct uvc_format *format;
+	struct uvc_frame *frame;
+	int ret;
+
+	if (fmt->type != stream->type)
+		return -EINVAL;
+
+	ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame);
+	if (ret < 0)
+		return ret;
+
+	mutex_lock(&stream->mutex);
+
+	if (uvc_queue_allocated(&stream->queue)) {
+		ret = -EBUSY;
+		goto done;
+	}
+
+	stream->ctrl = probe;
+	stream->cur_format = format;
+	stream->cur_frame = frame;
+
+done:
+	mutex_unlock(&stream->mutex);
+	return ret;
+}
+
+static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
+		struct v4l2_streamparm *parm)
+{
+	u32 numerator, denominator;
+
+	if (parm->type != stream->type)
+		return -EINVAL;
+
+	mutex_lock(&stream->mutex);
+	numerator = stream->ctrl.dwFrameInterval;
+	mutex_unlock(&stream->mutex);
+
+	denominator = 10000000;
+	v4l2_simplify_fraction(&numerator, &denominator, 8, 333);
+
+	memset(parm, 0, sizeof(*parm));
+	parm->type = stream->type;
+
+	if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+		parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+		parm->parm.capture.capturemode = 0;
+		parm->parm.capture.timeperframe.numerator = numerator;
+		parm->parm.capture.timeperframe.denominator = denominator;
+		parm->parm.capture.extendedmode = 0;
+		parm->parm.capture.readbuffers = 0;
+	} else {
+		parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
+		parm->parm.output.outputmode = 0;
+		parm->parm.output.timeperframe.numerator = numerator;
+		parm->parm.output.timeperframe.denominator = denominator;
+	}
+
+	return 0;
+}
+
+static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
+		struct v4l2_streamparm *parm)
+{
+	struct uvc_streaming_control probe;
+	struct v4l2_fract timeperframe;
+	struct uvc_format *format;
+	struct uvc_frame *frame;
+	u32 interval, maxd;
+	unsigned int i;
+	int ret;
+
+	if (parm->type != stream->type)
+		return -EINVAL;
+
+	if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		timeperframe = parm->parm.capture.timeperframe;
+	else
+		timeperframe = parm->parm.output.timeperframe;
+
+	interval = v4l2_fraction_to_interval(timeperframe.numerator,
+		timeperframe.denominator);
+	uvc_dbg(stream->dev, FORMAT, "Setting frame interval to %u/%u (%u)\n",
+		timeperframe.numerator, timeperframe.denominator, interval);
+
+	mutex_lock(&stream->mutex);
+
+	if (uvc_queue_streaming(&stream->queue)) {
+		mutex_unlock(&stream->mutex);
+		return -EBUSY;
+	}
+
+	format = stream->cur_format;
+	frame = stream->cur_frame;
+	probe = stream->ctrl;
+	probe.dwFrameInterval = uvc_try_frame_interval(frame, interval);
+	maxd = abs((s32)probe.dwFrameInterval - interval);
+
+	/* Try frames with matching size to find the best frame interval. */
+	for (i = 0; i < format->nframes && maxd != 0; i++) {
+		u32 d, ival;
+
+		if (&format->frame[i] == stream->cur_frame)
+			continue;
+
+		if (format->frame[i].wWidth != stream->cur_frame->wWidth ||
+		    format->frame[i].wHeight != stream->cur_frame->wHeight)
+			continue;
+
+		ival = uvc_try_frame_interval(&format->frame[i], interval);
+		d = abs((s32)ival - interval);
+		if (d >= maxd)
+			continue;
+
+		frame = &format->frame[i];
+		probe.bFrameIndex = frame->bFrameIndex;
+		probe.dwFrameInterval = ival;
+		maxd = d;
+	}
+
+	/* Probe the device with the new settings. */
+	ret = uvc_probe_video(stream, &probe);
+	if (ret < 0) {
+		mutex_unlock(&stream->mutex);
+		return ret;
+	}
+
+	stream->ctrl = probe;
+	stream->cur_frame = frame;
+	mutex_unlock(&stream->mutex);
+
+	/* Return the actual frame period. */
+	timeperframe.numerator = probe.dwFrameInterval;
+	timeperframe.denominator = 10000000;
+	v4l2_simplify_fraction(&timeperframe.numerator,
+		&timeperframe.denominator, 8, 333);
+
+	if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+		parm->parm.capture.timeperframe = timeperframe;
+		parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+	} else {
+		parm->parm.output.timeperframe = timeperframe;
+		parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
+	}
+
+	return 0;
+}
+
+/* ------------------------------------------------------------------------
+ * Privilege management
+ */
+
+/*
+ * Privilege management is the multiple-open implementation basis. The current
+ * implementation is completely transparent for the end-user and doesn't
+ * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls.
+ * Those ioctls enable finer control on the device (by making possible for a
+ * user to request exclusive access to a device), but are not mature yet.
+ * Switching to the V4L2 priority mechanism might be considered in the future
+ * if this situation changes.
+ *
+ * Each open instance of a UVC device can either be in a privileged or
+ * unprivileged state. Only a single instance can be in a privileged state at
+ * a given time. Trying to perform an operation that requires privileges will
+ * automatically acquire the required privileges if possible, or return -EBUSY
+ * otherwise. Privileges are dismissed when closing the instance or when
+ * freeing the video buffers using VIDIOC_REQBUFS.
+ *
+ * Operations that require privileges are:
+ *
+ * - VIDIOC_S_INPUT
+ * - VIDIOC_S_PARM
+ * - VIDIOC_S_FMT
+ * - VIDIOC_REQBUFS
+ */
+static int uvc_acquire_privileges(struct uvc_fh *handle)
+{
+	/* Always succeed if the handle is already privileged. */
+	if (handle->state == UVC_HANDLE_ACTIVE)
+		return 0;
+
+	/* Check if the device already has a privileged handle. */
+	if (atomic_inc_return(&handle->stream->active) != 1) {
+		atomic_dec(&handle->stream->active);
+		return -EBUSY;
+	}
+
+	handle->state = UVC_HANDLE_ACTIVE;
+	return 0;
+}
+
+static void uvc_dismiss_privileges(struct uvc_fh *handle)
+{
+	if (handle->state == UVC_HANDLE_ACTIVE)
+		atomic_dec(&handle->stream->active);
+
+	handle->state = UVC_HANDLE_PASSIVE;
+}
+
+static int uvc_has_privileges(struct uvc_fh *handle)
+{
+	return handle->state == UVC_HANDLE_ACTIVE;
+}
+
+/* ------------------------------------------------------------------------
+ * V4L2 file operations
+ */
+
+static int uvc_v4l2_open(struct file *file)
+{
+	struct uvc_streaming *stream;
+	struct uvc_fh *handle;
+	int ret = 0;
+
+	stream = video_drvdata(file);
+	uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
+
+	ret = usb_autopm_get_interface(stream->dev->intf);
+	if (ret < 0)
+		return ret;
+
+	/* Create the device handle. */
+	handle = kzalloc(sizeof(*handle), GFP_KERNEL);
+	if (handle == NULL) {
+		usb_autopm_put_interface(stream->dev->intf);
+		return -ENOMEM;
+	}
+
+	mutex_lock(&stream->dev->lock);
+	if (stream->dev->users == 0) {
+		ret = uvc_status_start(stream->dev, GFP_KERNEL);
+		if (ret < 0) {
+			mutex_unlock(&stream->dev->lock);
+			usb_autopm_put_interface(stream->dev->intf);
+			kfree(handle);
+			return ret;
+		}
+	}
+
+	stream->dev->users++;
+	mutex_unlock(&stream->dev->lock);
+
+	v4l2_fh_init(&handle->vfh, &stream->vdev);
+	v4l2_fh_add(&handle->vfh);
+	handle->chain = stream->chain;
+	handle->stream = stream;
+	handle->state = UVC_HANDLE_PASSIVE;
+	file->private_data = handle;
+
+	return 0;
+}
+
+static int uvc_v4l2_release(struct file *file)
+{
+	struct uvc_fh *handle = file->private_data;
+	struct uvc_streaming *stream = handle->stream;
+
+	uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
+
+	/* Only free resources if this is a privileged handle. */
+	if (uvc_has_privileges(handle))
+		uvc_queue_release(&stream->queue);
+
+	/* Release the file handle. */
+	uvc_dismiss_privileges(handle);
+	v4l2_fh_del(&handle->vfh);
+	v4l2_fh_exit(&handle->vfh);
+	kfree(handle);
+	file->private_data = NULL;
+
+	mutex_lock(&stream->dev->lock);
+	if (--stream->dev->users == 0)
+		uvc_status_stop(stream->dev);
+	mutex_unlock(&stream->dev->lock);
+
+	usb_autopm_put_interface(stream->dev->intf);
+	return 0;
+}
+
+static int uvc_ioctl_querycap(struct file *file, void *fh,
+			      struct v4l2_capability *cap)
+{
+	struct uvc_fh *handle = file->private_data;
+	struct uvc_video_chain *chain = handle->chain;
+	struct uvc_streaming *stream = handle->stream;
+
+	strscpy(cap->driver, "uvcvideo", sizeof(cap->driver));
+	strscpy(cap->card, handle->stream->dev->name, sizeof(cap->card));
+	usb_make_path(stream->dev->udev, cap->bus_info, sizeof(cap->bus_info));
+	cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
+			  | chain->caps;
+
+	return 0;
+}
+
+static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream,
+			      struct v4l2_fmtdesc *fmt)
+{
+	struct uvc_format *format;
+	enum v4l2_buf_type type = fmt->type;
+	u32 index = fmt->index;
+
+	if (fmt->type != stream->type || fmt->index >= stream->nformats)
+		return -EINVAL;
+
+	memset(fmt, 0, sizeof(*fmt));
+	fmt->index = index;
+	fmt->type = type;
+
+	format = &stream->format[fmt->index];
+	fmt->flags = 0;
+	if (format->flags & UVC_FMT_FLAG_COMPRESSED)
+		fmt->flags |= V4L2_FMT_FLAG_COMPRESSED;
+	strscpy(fmt->description, format->name, sizeof(fmt->description));
+	fmt->description[sizeof(fmt->description) - 1] = 0;
+	fmt->pixelformat = format->fcc;
+	return 0;
+}
+
+static int uvc_ioctl_enum_fmt_vid_cap(struct file *file, void *fh,
+				      struct v4l2_fmtdesc *fmt)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	return uvc_ioctl_enum_fmt(stream, fmt);
+}
+
+static int uvc_ioctl_enum_fmt_vid_out(struct file *file, void *fh,
+				      struct v4l2_fmtdesc *fmt)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	return uvc_ioctl_enum_fmt(stream, fmt);
+}
+
+static int uvc_ioctl_g_fmt_vid_cap(struct file *file, void *fh,
+				   struct v4l2_format *fmt)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	return uvc_v4l2_get_format(stream, fmt);
+}
+
+static int uvc_ioctl_g_fmt_vid_out(struct file *file, void *fh,
+				   struct v4l2_format *fmt)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	return uvc_v4l2_get_format(stream, fmt);
+}
+
+static int uvc_ioctl_s_fmt_vid_cap(struct file *file, void *fh,
+				   struct v4l2_format *fmt)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+	int ret;
+
+	ret = uvc_acquire_privileges(handle);
+	if (ret < 0)
+		return ret;
+
+	return uvc_v4l2_set_format(stream, fmt);
+}
+
+static int uvc_ioctl_s_fmt_vid_out(struct file *file, void *fh,
+				   struct v4l2_format *fmt)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+	int ret;
+
+	ret = uvc_acquire_privileges(handle);
+	if (ret < 0)
+		return ret;
+
+	return uvc_v4l2_set_format(stream, fmt);
+}
+
+static int uvc_ioctl_try_fmt_vid_cap(struct file *file, void *fh,
+				     struct v4l2_format *fmt)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+	struct uvc_streaming_control probe;
+
+	return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
+}
+
+static int uvc_ioctl_try_fmt_vid_out(struct file *file, void *fh,
+				     struct v4l2_format *fmt)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+	struct uvc_streaming_control probe;
+
+	return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
+}
+
+static int uvc_ioctl_reqbufs(struct file *file, void *fh,
+			     struct v4l2_requestbuffers *rb)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+	int ret;
+
+	ret = uvc_acquire_privileges(handle);
+	if (ret < 0)
+		return ret;
+
+	mutex_lock(&stream->mutex);
+	ret = uvc_request_buffers(&stream->queue, rb);
+	mutex_unlock(&stream->mutex);
+	if (ret < 0)
+		return ret;
+
+	if (ret == 0)
+		uvc_dismiss_privileges(handle);
+
+	return 0;
+}
+
+static int uvc_ioctl_querybuf(struct file *file, void *fh,
+			      struct v4l2_buffer *buf)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	if (!uvc_has_privileges(handle))
+		return -EBUSY;
+
+	return uvc_query_buffer(&stream->queue, buf);
+}
+
+static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	if (!uvc_has_privileges(handle))
+		return -EBUSY;
+
+	return uvc_queue_buffer(&stream->queue,
+				stream->vdev.v4l2_dev->mdev, buf);
+}
+
+static int uvc_ioctl_expbuf(struct file *file, void *fh,
+			    struct v4l2_exportbuffer *exp)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	if (!uvc_has_privileges(handle))
+		return -EBUSY;
+
+	return uvc_export_buffer(&stream->queue, exp);
+}
+
+static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	if (!uvc_has_privileges(handle))
+		return -EBUSY;
+
+	return uvc_dequeue_buffer(&stream->queue, buf,
+				  file->f_flags & O_NONBLOCK);
+}
+
+static int uvc_ioctl_create_bufs(struct file *file, void *fh,
+				  struct v4l2_create_buffers *cb)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+	int ret;
+
+	ret = uvc_acquire_privileges(handle);
+	if (ret < 0)
+		return ret;
+
+	return uvc_create_buffers(&stream->queue, cb);
+}
+
+static int uvc_ioctl_streamon(struct file *file, void *fh,
+			      enum v4l2_buf_type type)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+	int ret;
+
+	if (!uvc_has_privileges(handle))
+		return -EBUSY;
+
+	mutex_lock(&stream->mutex);
+	ret = uvc_queue_streamon(&stream->queue, type);
+	mutex_unlock(&stream->mutex);
+
+	return ret;
+}
+
+static int uvc_ioctl_streamoff(struct file *file, void *fh,
+			       enum v4l2_buf_type type)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	if (!uvc_has_privileges(handle))
+		return -EBUSY;
+
+	mutex_lock(&stream->mutex);
+	uvc_queue_streamoff(&stream->queue, type);
+	mutex_unlock(&stream->mutex);
+
+	return 0;
+}
+
+static int uvc_ioctl_enum_input(struct file *file, void *fh,
+				struct v4l2_input *input)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_video_chain *chain = handle->chain;
+	const struct uvc_entity *selector = chain->selector;
+	struct uvc_entity *iterm = NULL;
+	struct uvc_entity *it;
+	u32 index = input->index;
+
+	if (selector == NULL ||
+	    (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
+		if (index != 0)
+			return -EINVAL;
+		list_for_each_entry(it, &chain->entities, chain) {
+			if (UVC_ENTITY_IS_ITERM(it)) {
+				iterm = it;
+				break;
+			}
+		}
+	} else if (index < selector->bNrInPins) {
+		list_for_each_entry(it, &chain->entities, chain) {
+			if (!UVC_ENTITY_IS_ITERM(it))
+				continue;
+			if (it->id == selector->baSourceID[index]) {
+				iterm = it;
+				break;
+			}
+		}
+	}
+
+	if (iterm == NULL)
+		return -EINVAL;
+
+	memset(input, 0, sizeof(*input));
+	input->index = index;
+	strscpy(input->name, iterm->name, sizeof(input->name));
+	if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA)
+		input->type = V4L2_INPUT_TYPE_CAMERA;
+
+	return 0;
+}
+
+static int uvc_ioctl_g_input(struct file *file, void *fh, unsigned int *input)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_video_chain *chain = handle->chain;
+	u8 *buf;
+	int ret;
+
+	if (chain->selector == NULL ||
+	    (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
+		*input = 0;
+		return 0;
+	}
+
+	buf = kmalloc(1, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, chain->selector->id,
+			     chain->dev->intfnum,  UVC_SU_INPUT_SELECT_CONTROL,
+			     buf, 1);
+	if (!ret)
+		*input = *buf - 1;
+
+	kfree(buf);
+
+	return ret;
+}
+
+static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_video_chain *chain = handle->chain;
+	u8 *buf;
+	int ret;
+
+	ret = uvc_acquire_privileges(handle);
+	if (ret < 0)
+		return ret;
+
+	if (chain->selector == NULL ||
+	    (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
+		if (input)
+			return -EINVAL;
+		return 0;
+	}
+
+	if (input >= chain->selector->bNrInPins)
+		return -EINVAL;
+
+	buf = kmalloc(1, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	*buf = input + 1;
+	ret = uvc_query_ctrl(chain->dev, UVC_SET_CUR, chain->selector->id,
+			     chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL,
+			     buf, 1);
+	kfree(buf);
+
+	return ret;
+}
+
+static int uvc_ioctl_queryctrl(struct file *file, void *fh,
+			       struct v4l2_queryctrl *qc)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_video_chain *chain = handle->chain;
+
+	return uvc_query_v4l2_ctrl(chain, qc);
+}
+
+static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh,
+				    struct v4l2_query_ext_ctrl *qec)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_video_chain *chain = handle->chain;
+	struct v4l2_queryctrl qc = { qec->id };
+	int ret;
+
+	ret = uvc_query_v4l2_ctrl(chain, &qc);
+	if (ret)
+		return ret;
+
+	qec->id = qc.id;
+	qec->type = qc.type;
+	strscpy(qec->name, qc.name, sizeof(qec->name));
+	qec->minimum = qc.minimum;
+	qec->maximum = qc.maximum;
+	qec->step = qc.step;
+	qec->default_value = qc.default_value;
+	qec->flags = qc.flags;
+	qec->elem_size = 4;
+	qec->elems = 1;
+	qec->nr_of_dims = 0;
+	memset(qec->dims, 0, sizeof(qec->dims));
+	memset(qec->reserved, 0, sizeof(qec->reserved));
+
+	return 0;
+}
+
+static int uvc_ctrl_check_access(struct uvc_video_chain *chain,
+				 struct v4l2_ext_controls *ctrls,
+				 unsigned long ioctl)
+{
+	struct v4l2_ext_control *ctrl = ctrls->controls;
+	unsigned int i;
+	int ret = 0;
+
+	for (i = 0; i < ctrls->count; ++ctrl, ++i) {
+		ret = uvc_ctrl_is_accessible(chain, ctrl->id,
+					    ioctl == VIDIOC_G_EXT_CTRLS);
+		if (ret)
+			break;
+	}
+
+	ctrls->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : ctrls->count;
+
+	return ret;
+}
+
+static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
+				 struct v4l2_ext_controls *ctrls)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_video_chain *chain = handle->chain;
+	struct v4l2_ext_control *ctrl = ctrls->controls;
+	unsigned int i;
+	int ret;
+
+	ret = uvc_ctrl_check_access(chain, ctrls, VIDIOC_G_EXT_CTRLS);
+	if (ret < 0)
+		return ret;
+
+	if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) {
+		for (i = 0; i < ctrls->count; ++ctrl, ++i) {
+			struct v4l2_queryctrl qc = { .id = ctrl->id };
+
+			ret = uvc_query_v4l2_ctrl(chain, &qc);
+			if (ret < 0) {
+				ctrls->error_idx = i;
+				return ret;
+			}
+
+			ctrl->value = qc.default_value;
+		}
+
+		return 0;
+	}
+
+	ret = uvc_ctrl_begin(chain);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < ctrls->count; ++ctrl, ++i) {
+		ret = uvc_ctrl_get(chain, ctrl);
+		if (ret < 0) {
+			uvc_ctrl_rollback(handle);
+			ctrls->error_idx = i;
+			return ret;
+		}
+	}
+
+	ctrls->error_idx = 0;
+
+	return uvc_ctrl_rollback(handle);
+}
+
+static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
+				     struct v4l2_ext_controls *ctrls,
+				     unsigned long ioctl)
+{
+	struct v4l2_ext_control *ctrl = ctrls->controls;
+	struct uvc_video_chain *chain = handle->chain;
+	unsigned int i;
+	int ret;
+
+	ret = uvc_ctrl_check_access(chain, ctrls, ioctl);
+	if (ret < 0)
+		return ret;
+
+	ret = uvc_ctrl_begin(chain);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < ctrls->count; ++ctrl, ++i) {
+		ret = uvc_ctrl_set(handle, ctrl);
+		if (ret < 0) {
+			uvc_ctrl_rollback(handle);
+			ctrls->error_idx = ioctl == VIDIOC_S_EXT_CTRLS ?
+						    ctrls->count : i;
+			return ret;
+		}
+	}
+
+	ctrls->error_idx = 0;
+
+	if (ioctl == VIDIOC_S_EXT_CTRLS)
+		return uvc_ctrl_commit(handle, ctrls);
+	else
+		return uvc_ctrl_rollback(handle);
+}
+
+static int uvc_ioctl_s_ext_ctrls(struct file *file, void *fh,
+				 struct v4l2_ext_controls *ctrls)
+{
+	struct uvc_fh *handle = fh;
+
+	return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, VIDIOC_S_EXT_CTRLS);
+}
+
+static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh,
+				   struct v4l2_ext_controls *ctrls)
+{
+	struct uvc_fh *handle = fh;
+
+	return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, VIDIOC_TRY_EXT_CTRLS);
+}
+
+static int uvc_ioctl_querymenu(struct file *file, void *fh,
+			       struct v4l2_querymenu *qm)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_video_chain *chain = handle->chain;
+
+	return uvc_query_v4l2_menu(chain, qm);
+}
+
+static int uvc_ioctl_g_selection(struct file *file, void *fh,
+				 struct v4l2_selection *sel)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	if (sel->type != stream->type)
+		return -EINVAL;
+
+	switch (sel->target) {
+	case V4L2_SEL_TGT_CROP_DEFAULT:
+	case V4L2_SEL_TGT_CROP_BOUNDS:
+		if (stream->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+			return -EINVAL;
+		break;
+	case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+	case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+		if (stream->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
+			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	sel->r.left = 0;
+	sel->r.top = 0;
+	mutex_lock(&stream->mutex);
+	sel->r.width = stream->cur_frame->wWidth;
+	sel->r.height = stream->cur_frame->wHeight;
+	mutex_unlock(&stream->mutex);
+
+	return 0;
+}
+
+static int uvc_ioctl_g_parm(struct file *file, void *fh,
+			    struct v4l2_streamparm *parm)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+
+	return uvc_v4l2_get_streamparm(stream, parm);
+}
+
+static int uvc_ioctl_s_parm(struct file *file, void *fh,
+			    struct v4l2_streamparm *parm)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+	int ret;
+
+	ret = uvc_acquire_privileges(handle);
+	if (ret < 0)
+		return ret;
+
+	return uvc_v4l2_set_streamparm(stream, parm);
+}
+
+static int uvc_ioctl_enum_framesizes(struct file *file, void *fh,
+				     struct v4l2_frmsizeenum *fsize)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+	struct uvc_format *format = NULL;
+	struct uvc_frame *frame = NULL;
+	unsigned int index;
+	unsigned int i;
+
+	/* Look for the given pixel format */
+	for (i = 0; i < stream->nformats; i++) {
+		if (stream->format[i].fcc == fsize->pixel_format) {
+			format = &stream->format[i];
+			break;
+		}
+	}
+	if (format == NULL)
+		return -EINVAL;
+
+	/* Skip duplicate frame sizes */
+	for (i = 0, index = 0; i < format->nframes; i++) {
+		if (frame && frame->wWidth == format->frame[i].wWidth &&
+		    frame->wHeight == format->frame[i].wHeight)
+			continue;
+		frame = &format->frame[i];
+		if (index == fsize->index)
+			break;
+		index++;
+	}
+
+	if (i == format->nframes)
+		return -EINVAL;
+
+	fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+	fsize->discrete.width = frame->wWidth;
+	fsize->discrete.height = frame->wHeight;
+	return 0;
+}
+
+static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh,
+					 struct v4l2_frmivalenum *fival)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_streaming *stream = handle->stream;
+	struct uvc_format *format = NULL;
+	struct uvc_frame *frame = NULL;
+	unsigned int nintervals;
+	unsigned int index;
+	unsigned int i;
+
+	/* Look for the given pixel format and frame size */
+	for (i = 0; i < stream->nformats; i++) {
+		if (stream->format[i].fcc == fival->pixel_format) {
+			format = &stream->format[i];
+			break;
+		}
+	}
+	if (format == NULL)
+		return -EINVAL;
+
+	index = fival->index;
+	for (i = 0; i < format->nframes; i++) {
+		if (format->frame[i].wWidth == fival->width &&
+		    format->frame[i].wHeight == fival->height) {
+			frame = &format->frame[i];
+			nintervals = frame->bFrameIntervalType ?: 1;
+			if (index < nintervals)
+				break;
+			index -= nintervals;
+		}
+	}
+	if (i == format->nframes)
+		return -EINVAL;
+
+	if (frame->bFrameIntervalType) {
+		fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+		fival->discrete.numerator =
+			frame->dwFrameInterval[index];
+		fival->discrete.denominator = 10000000;
+		v4l2_simplify_fraction(&fival->discrete.numerator,
+			&fival->discrete.denominator, 8, 333);
+	} else {
+		fival->type = V4L2_FRMIVAL_TYPE_STEPWISE;
+		fival->stepwise.min.numerator = frame->dwFrameInterval[0];
+		fival->stepwise.min.denominator = 10000000;
+		fival->stepwise.max.numerator = frame->dwFrameInterval[1];
+		fival->stepwise.max.denominator = 10000000;
+		fival->stepwise.step.numerator = frame->dwFrameInterval[2];
+		fival->stepwise.step.denominator = 10000000;
+		v4l2_simplify_fraction(&fival->stepwise.min.numerator,
+			&fival->stepwise.min.denominator, 8, 333);
+		v4l2_simplify_fraction(&fival->stepwise.max.numerator,
+			&fival->stepwise.max.denominator, 8, 333);
+		v4l2_simplify_fraction(&fival->stepwise.step.numerator,
+			&fival->stepwise.step.denominator, 8, 333);
+	}
+
+	return 0;
+}
+
+static int uvc_ioctl_subscribe_event(struct v4l2_fh *fh,
+				     const struct v4l2_event_subscription *sub)
+{
+	switch (sub->type) {
+	case V4L2_EVENT_CTRL:
+		return v4l2_event_subscribe(fh, sub, 0, &uvc_ctrl_sub_ev_ops);
+	default:
+		return -EINVAL;
+	}
+}
+
+static long uvc_ioctl_default(struct file *file, void *fh, bool valid_prio,
+			      unsigned int cmd, void *arg)
+{
+	struct uvc_fh *handle = fh;
+	struct uvc_video_chain *chain = handle->chain;
+
+	switch (cmd) {
+	/* Dynamic controls. */
+	case UVCIOC_CTRL_MAP:
+		return uvc_ioctl_ctrl_map(chain, arg);
+
+	case UVCIOC_CTRL_QUERY:
+		return uvc_xu_ctrl_query(chain, arg);
+
+	default:
+		return -ENOTTY;
+	}
+}
+
+#ifdef CONFIG_COMPAT
+struct uvc_xu_control_mapping32 {
+	u32 id;
+	u8 name[32];
+	u8 entity[16];
+	u8 selector;
+
+	u8 size;
+	u8 offset;
+	u32 v4l2_type;
+	u32 data_type;
+
+	compat_caddr_t menu_info;
+	u32 menu_count;
+
+	u32 reserved[4];
+};
+
+static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp,
+			const struct uvc_xu_control_mapping32 __user *up)
+{
+	struct uvc_xu_control_mapping32 *p = (void *)kp;
+	compat_caddr_t info;
+	u32 count;
+
+	if (copy_from_user(p, up, sizeof(*p)))
+		return -EFAULT;
+
+	count = p->menu_count;
+	info = p->menu_info;
+
+	memset(kp->reserved, 0, sizeof(kp->reserved));
+	kp->menu_info = count ? compat_ptr(info) : NULL;
+	kp->menu_count = count;
+	return 0;
+}
+
+static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp,
+			struct uvc_xu_control_mapping32 __user *up)
+{
+	if (copy_to_user(up, kp, offsetof(typeof(*up), menu_info)) ||
+	    put_user(kp->menu_count, &up->menu_count))
+		return -EFAULT;
+
+	if (clear_user(up->reserved, sizeof(up->reserved)))
+		return -EFAULT;
+
+	return 0;
+}
+
+struct uvc_xu_control_query32 {
+	u8 unit;
+	u8 selector;
+	u8 query;
+	u16 size;
+	compat_caddr_t data;
+};
+
+static int uvc_v4l2_get_xu_query(struct uvc_xu_control_query *kp,
+			const struct uvc_xu_control_query32 __user *up)
+{
+	struct uvc_xu_control_query32 v;
+
+	if (copy_from_user(&v, up, sizeof(v)))
+		return -EFAULT;
+
+	*kp = (struct uvc_xu_control_query){
+		.unit = v.unit,
+		.selector = v.selector,
+		.query = v.query,
+		.size = v.size,
+		.data = v.size ? compat_ptr(v.data) : NULL
+	};
+	return 0;
+}
+
+static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp,
+			struct uvc_xu_control_query32 __user *up)
+{
+	if (copy_to_user(up, kp, offsetof(typeof(*up), data)))
+		return -EFAULT;
+	return 0;
+}
+
+#define UVCIOC_CTRL_MAP32	_IOWR('u', 0x20, struct uvc_xu_control_mapping32)
+#define UVCIOC_CTRL_QUERY32	_IOWR('u', 0x21, struct uvc_xu_control_query32)
+
+static long uvc_v4l2_compat_ioctl32(struct file *file,
+		     unsigned int cmd, unsigned long arg)
+{
+	struct uvc_fh *handle = file->private_data;
+	union {
+		struct uvc_xu_control_mapping xmap;
+		struct uvc_xu_control_query xqry;
+	} karg;
+	void __user *up = compat_ptr(arg);
+	long ret;
+
+	switch (cmd) {
+	case UVCIOC_CTRL_MAP32:
+		ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up);
+		if (ret)
+			return ret;
+		ret = uvc_ioctl_ctrl_map(handle->chain, &karg.xmap);
+		if (ret)
+			return ret;
+		ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up);
+		if (ret)
+			return ret;
+
+		break;
+
+	case UVCIOC_CTRL_QUERY32:
+		ret = uvc_v4l2_get_xu_query(&karg.xqry, up);
+		if (ret)
+			return ret;
+		ret = uvc_xu_ctrl_query(handle->chain, &karg.xqry);
+		if (ret)
+			return ret;
+		ret = uvc_v4l2_put_xu_query(&karg.xqry, up);
+		if (ret)
+			return ret;
+		break;
+
+	default:
+		return -ENOIOCTLCMD;
+	}
+
+	return ret;
+}
+#endif
+
+static ssize_t uvc_v4l2_read(struct file *file, char __user *data,
+		    size_t count, loff_t *ppos)
+{
+	struct uvc_fh *handle = file->private_data;
+	struct uvc_streaming *stream = handle->stream;
+
+	uvc_dbg(stream->dev, CALLS, "%s: not implemented\n", __func__);
+	return -EINVAL;
+}
+
+static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct uvc_fh *handle = file->private_data;
+	struct uvc_streaming *stream = handle->stream;
+
+	uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
+
+	return uvc_queue_mmap(&stream->queue, vma);
+}
+
+static __poll_t uvc_v4l2_poll(struct file *file, poll_table *wait)
+{
+	struct uvc_fh *handle = file->private_data;
+	struct uvc_streaming *stream = handle->stream;
+
+	uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
+
+	return uvc_queue_poll(&stream->queue, file, wait);
+}
+
+#ifndef CONFIG_MMU
+static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,
+		unsigned long addr, unsigned long len, unsigned long pgoff,
+		unsigned long flags)
+{
+	struct uvc_fh *handle = file->private_data;
+	struct uvc_streaming *stream = handle->stream;
+
+	uvc_dbg(stream->dev, CALLS, "%s\n", __func__);
+
+	return uvc_queue_get_unmapped_area(&stream->queue, pgoff);
+}
+#endif
+
+const struct v4l2_ioctl_ops uvc_ioctl_ops = {
+	.vidioc_querycap = uvc_ioctl_querycap,
+	.vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap,
+	.vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt_vid_out,
+	.vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt_vid_cap,
+	.vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt_vid_out,
+	.vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt_vid_cap,
+	.vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out,
+	.vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap,
+	.vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out,
+	.vidioc_reqbufs = uvc_ioctl_reqbufs,
+	.vidioc_querybuf = uvc_ioctl_querybuf,
+	.vidioc_qbuf = uvc_ioctl_qbuf,
+	.vidioc_expbuf = uvc_ioctl_expbuf,
+	.vidioc_dqbuf = uvc_ioctl_dqbuf,
+	.vidioc_create_bufs = uvc_ioctl_create_bufs,
+	.vidioc_streamon = uvc_ioctl_streamon,
+	.vidioc_streamoff = uvc_ioctl_streamoff,
+	.vidioc_enum_input = uvc_ioctl_enum_input,
+	.vidioc_g_input = uvc_ioctl_g_input,
+	.vidioc_s_input = uvc_ioctl_s_input,
+	.vidioc_queryctrl = uvc_ioctl_queryctrl,
+	.vidioc_query_ext_ctrl = uvc_ioctl_query_ext_ctrl,
+	.vidioc_g_ext_ctrls = uvc_ioctl_g_ext_ctrls,
+	.vidioc_s_ext_ctrls = uvc_ioctl_s_ext_ctrls,
+	.vidioc_try_ext_ctrls = uvc_ioctl_try_ext_ctrls,
+	.vidioc_querymenu = uvc_ioctl_querymenu,
+	.vidioc_g_selection = uvc_ioctl_g_selection,
+	.vidioc_g_parm = uvc_ioctl_g_parm,
+	.vidioc_s_parm = uvc_ioctl_s_parm,
+	.vidioc_enum_framesizes = uvc_ioctl_enum_framesizes,
+	.vidioc_enum_frameintervals = uvc_ioctl_enum_frameintervals,
+	.vidioc_subscribe_event = uvc_ioctl_subscribe_event,
+	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+	.vidioc_default = uvc_ioctl_default,
+};
+
+const struct v4l2_file_operations uvc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= uvc_v4l2_open,
+	.release	= uvc_v4l2_release,
+	.unlocked_ioctl	= video_ioctl2,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl32	= uvc_v4l2_compat_ioctl32,
+#endif
+	.read		= uvc_v4l2_read,
+	.mmap		= uvc_v4l2_mmap,
+	.poll		= uvc_v4l2_poll,
+#ifndef CONFIG_MMU
+	.get_unmapped_area = uvc_v4l2_get_unmapped_area,
+#endif
+};
+