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, 500 insertions, 0 deletions

diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c
new file mode 100644
index 000000000..aa944270e
--- /dev/null
+++ b/drivers/media/test-drivers/vimc/vimc-capture.c
@@ -0,0 +1,500 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * vimc-capture.c Virtual Media Controller Driver
+ *
+ * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
+ */
+
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-core.h>
+#include <media/videobuf2-dma-contig.h>
+#include <media/videobuf2-vmalloc.h>
+
+#include "vimc-common.h"
+#include "vimc-streamer.h"
+
+struct vimc_capture_device {
+	struct vimc_ent_device ved;
+	struct video_device vdev;
+	struct v4l2_pix_format format;
+	struct vb2_queue queue;
+	struct list_head buf_list;
+	/*
+	 * NOTE: in a real driver, a spin lock must be used to access the
+	 * queue because the frames are generated from a hardware interruption
+	 * and the isr is not allowed to sleep.
+	 * Even if it is not necessary a spinlock in the vimc driver, we
+	 * use it here as a code reference
+	 */
+	spinlock_t qlock;
+	struct mutex lock;
+	u32 sequence;
+	struct vimc_stream stream;
+	struct media_pad pad;
+};
+
+static const struct v4l2_pix_format fmt_default = {
+	.width = 640,
+	.height = 480,
+	.pixelformat = V4L2_PIX_FMT_RGB24,
+	.field = V4L2_FIELD_NONE,
+	.colorspace = V4L2_COLORSPACE_SRGB,
+};
+
+struct vimc_capture_buffer {
+	/*
+	 * struct vb2_v4l2_buffer must be the first element
+	 * the videobuf2 framework will allocate this struct based on
+	 * buf_struct_size and use the first sizeof(struct vb2_buffer) bytes of
+	 * memory as a vb2_buffer
+	 */
+	struct vb2_v4l2_buffer vb2;
+	struct list_head list;
+};
+
+static int vimc_capture_querycap(struct file *file, void *priv,
+			     struct v4l2_capability *cap)
+{
+	strscpy(cap->driver, VIMC_PDEV_NAME, sizeof(cap->driver));
+	strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card));
+	snprintf(cap->bus_info, sizeof(cap->bus_info),
+		 "platform:%s", VIMC_PDEV_NAME);
+
+	return 0;
+}
+
+static void vimc_capture_get_format(struct vimc_ent_device *ved,
+				struct v4l2_pix_format *fmt)
+{
+	struct vimc_capture_device *vcapture = container_of(ved, struct vimc_capture_device,
+						    ved);
+
+	*fmt = vcapture->format;
+}
+
+static int vimc_capture_g_fmt_vid_cap(struct file *file, void *priv,
+				  struct v4l2_format *f)
+{
+	struct vimc_capture_device *vcapture = video_drvdata(file);
+
+	f->fmt.pix = vcapture->format;
+
+	return 0;
+}
+
+static int vimc_capture_try_fmt_vid_cap(struct file *file, void *priv,
+				    struct v4l2_format *f)
+{
+	struct v4l2_pix_format *format = &f->fmt.pix;
+	const struct vimc_pix_map *vpix;
+
+	format->width = clamp_t(u32, format->width, VIMC_FRAME_MIN_WIDTH,
+				VIMC_FRAME_MAX_WIDTH) & ~1;
+	format->height = clamp_t(u32, format->height, VIMC_FRAME_MIN_HEIGHT,
+				 VIMC_FRAME_MAX_HEIGHT) & ~1;
+
+	/* Don't accept a pixelformat that is not on the table */
+	vpix = vimc_pix_map_by_pixelformat(format->pixelformat);
+	if (!vpix) {
+		format->pixelformat = fmt_default.pixelformat;
+		vpix = vimc_pix_map_by_pixelformat(format->pixelformat);
+	}
+	/* TODO: Add support for custom bytesperline values */
+	format->bytesperline = format->width * vpix->bpp;
+	format->sizeimage = format->bytesperline * format->height;
+
+	if (format->field == V4L2_FIELD_ANY)
+		format->field = fmt_default.field;
+
+	vimc_colorimetry_clamp(format);
+
+	if (format->colorspace == V4L2_COLORSPACE_DEFAULT)
+		format->colorspace = fmt_default.colorspace;
+
+	return 0;
+}
+
+static int vimc_capture_s_fmt_vid_cap(struct file *file, void *priv,
+				  struct v4l2_format *f)
+{
+	struct vimc_capture_device *vcapture = video_drvdata(file);
+	int ret;
+
+	/* Do not change the format while stream is on */
+	if (vb2_is_busy(&vcapture->queue))
+		return -EBUSY;
+
+	ret = vimc_capture_try_fmt_vid_cap(file, priv, f);
+	if (ret)
+		return ret;
+
+	dev_dbg(vcapture->ved.dev, "%s: format update: "
+		"old:%dx%d (0x%x, %d, %d, %d, %d) "
+		"new:%dx%d (0x%x, %d, %d, %d, %d)\n", vcapture->vdev.name,
+		/* old */
+		vcapture->format.width, vcapture->format.height,
+		vcapture->format.pixelformat, vcapture->format.colorspace,
+		vcapture->format.quantization, vcapture->format.xfer_func,
+		vcapture->format.ycbcr_enc,
+		/* new */
+		f->fmt.pix.width, f->fmt.pix.height,
+		f->fmt.pix.pixelformat,	f->fmt.pix.colorspace,
+		f->fmt.pix.quantization, f->fmt.pix.xfer_func,
+		f->fmt.pix.ycbcr_enc);
+
+	vcapture->format = f->fmt.pix;
+
+	return 0;
+}
+
+static int vimc_capture_enum_fmt_vid_cap(struct file *file, void *priv,
+				     struct v4l2_fmtdesc *f)
+{
+	const struct vimc_pix_map *vpix;
+
+	if (f->mbus_code) {
+		if (f->index > 0)
+			return -EINVAL;
+
+		vpix = vimc_pix_map_by_code(f->mbus_code);
+	} else {
+		vpix = vimc_pix_map_by_index(f->index);
+	}
+
+	if (!vpix)
+		return -EINVAL;
+
+	f->pixelformat = vpix->pixelformat;
+
+	return 0;
+}
+
+static int vimc_capture_enum_framesizes(struct file *file, void *fh,
+				    struct v4l2_frmsizeenum *fsize)
+{
+	const struct vimc_pix_map *vpix;
+
+	if (fsize->index)
+		return -EINVAL;
+
+	/* Only accept code in the pix map table */
+	vpix = vimc_pix_map_by_code(fsize->pixel_format);
+	if (!vpix)
+		return -EINVAL;
+
+	fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
+	fsize->stepwise.min_width = VIMC_FRAME_MIN_WIDTH;
+	fsize->stepwise.max_width = VIMC_FRAME_MAX_WIDTH;
+	fsize->stepwise.min_height = VIMC_FRAME_MIN_HEIGHT;
+	fsize->stepwise.max_height = VIMC_FRAME_MAX_HEIGHT;
+	fsize->stepwise.step_width = 1;
+	fsize->stepwise.step_height = 1;
+
+	return 0;
+}
+
+static const struct v4l2_file_operations vimc_capture_fops = {
+	.owner		= THIS_MODULE,
+	.open		= v4l2_fh_open,
+	.release	= vb2_fop_release,
+	.read           = vb2_fop_read,
+	.poll		= vb2_fop_poll,
+	.unlocked_ioctl = video_ioctl2,
+	.mmap           = vb2_fop_mmap,
+};
+
+static const struct v4l2_ioctl_ops vimc_capture_ioctl_ops = {
+	.vidioc_querycap = vimc_capture_querycap,
+
+	.vidioc_g_fmt_vid_cap = vimc_capture_g_fmt_vid_cap,
+	.vidioc_s_fmt_vid_cap = vimc_capture_s_fmt_vid_cap,
+	.vidioc_try_fmt_vid_cap = vimc_capture_try_fmt_vid_cap,
+	.vidioc_enum_fmt_vid_cap = vimc_capture_enum_fmt_vid_cap,
+	.vidioc_enum_framesizes = vimc_capture_enum_framesizes,
+
+	.vidioc_reqbufs = vb2_ioctl_reqbufs,
+	.vidioc_create_bufs = vb2_ioctl_create_bufs,
+	.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+	.vidioc_querybuf = vb2_ioctl_querybuf,
+	.vidioc_qbuf = vb2_ioctl_qbuf,
+	.vidioc_dqbuf = vb2_ioctl_dqbuf,
+	.vidioc_expbuf = vb2_ioctl_expbuf,
+	.vidioc_streamon = vb2_ioctl_streamon,
+	.vidioc_streamoff = vb2_ioctl_streamoff,
+};
+
+static void vimc_capture_return_all_buffers(struct vimc_capture_device *vcapture,
+					enum vb2_buffer_state state)
+{
+	struct vimc_capture_buffer *vbuf, *node;
+
+	spin_lock(&vcapture->qlock);
+
+	list_for_each_entry_safe(vbuf, node, &vcapture->buf_list, list) {
+		list_del(&vbuf->list);
+		vb2_buffer_done(&vbuf->vb2.vb2_buf, state);
+	}
+
+	spin_unlock(&vcapture->qlock);
+}
+
+static int vimc_capture_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+	struct vimc_capture_device *vcapture = vb2_get_drv_priv(vq);
+	int ret;
+
+	vcapture->sequence = 0;
+
+	/* Start the media pipeline */
+	ret = video_device_pipeline_start(&vcapture->vdev, &vcapture->stream.pipe);
+	if (ret) {
+		vimc_capture_return_all_buffers(vcapture, VB2_BUF_STATE_QUEUED);
+		return ret;
+	}
+
+	ret = vimc_streamer_s_stream(&vcapture->stream, &vcapture->ved, 1);
+	if (ret) {
+		video_device_pipeline_stop(&vcapture->vdev);
+		vimc_capture_return_all_buffers(vcapture, VB2_BUF_STATE_QUEUED);
+		return ret;
+	}
+
+	return 0;
+}
+
+/*
+ * Stop the stream engine. Any remaining buffers in the stream queue are
+ * dequeued and passed on to the vb2 framework marked as STATE_ERROR.
+ */
+static void vimc_capture_stop_streaming(struct vb2_queue *vq)
+{
+	struct vimc_capture_device *vcapture = vb2_get_drv_priv(vq);
+
+	vimc_streamer_s_stream(&vcapture->stream, &vcapture->ved, 0);
+
+	/* Stop the media pipeline */
+	video_device_pipeline_stop(&vcapture->vdev);
+
+	/* Release all active buffers */
+	vimc_capture_return_all_buffers(vcapture, VB2_BUF_STATE_ERROR);
+}
+
+static void vimc_capture_buf_queue(struct vb2_buffer *vb2_buf)
+{
+	struct vimc_capture_device *vcapture = vb2_get_drv_priv(vb2_buf->vb2_queue);
+	struct vimc_capture_buffer *buf = container_of(vb2_buf,
+						   struct vimc_capture_buffer,
+						   vb2.vb2_buf);
+
+	spin_lock(&vcapture->qlock);
+	list_add_tail(&buf->list, &vcapture->buf_list);
+	spin_unlock(&vcapture->qlock);
+}
+
+static int vimc_capture_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
+				unsigned int *nplanes, unsigned int sizes[],
+				struct device *alloc_devs[])
+{
+	struct vimc_capture_device *vcapture = vb2_get_drv_priv(vq);
+
+	if (*nplanes)
+		return sizes[0] < vcapture->format.sizeimage ? -EINVAL : 0;
+	/* We don't support multiplanes for now */
+	*nplanes = 1;
+	sizes[0] = vcapture->format.sizeimage;
+
+	return 0;
+}
+
+static int vimc_capture_buffer_prepare(struct vb2_buffer *vb)
+{
+	struct vimc_capture_device *vcapture = vb2_get_drv_priv(vb->vb2_queue);
+	unsigned long size = vcapture->format.sizeimage;
+
+	if (vb2_plane_size(vb, 0) < size) {
+		dev_err(vcapture->ved.dev, "%s: buffer too small (%lu < %lu)\n",
+			vcapture->vdev.name, vb2_plane_size(vb, 0), size);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static const struct vb2_ops vimc_capture_qops = {
+	.start_streaming	= vimc_capture_start_streaming,
+	.stop_streaming		= vimc_capture_stop_streaming,
+	.buf_queue		= vimc_capture_buf_queue,
+	.queue_setup		= vimc_capture_queue_setup,
+	.buf_prepare		= vimc_capture_buffer_prepare,
+	/*
+	 * Since q->lock is set we can use the standard
+	 * vb2_ops_wait_prepare/finish helper functions.
+	 */
+	.wait_prepare		= vb2_ops_wait_prepare,
+	.wait_finish		= vb2_ops_wait_finish,
+};
+
+static const struct media_entity_operations vimc_capture_mops = {
+	.link_validate		= vimc_vdev_link_validate,
+};
+
+static void vimc_capture_release(struct vimc_ent_device *ved)
+{
+	struct vimc_capture_device *vcapture =
+		container_of(ved, struct vimc_capture_device, ved);
+
+	media_entity_cleanup(vcapture->ved.ent);
+	kfree(vcapture);
+}
+
+static void vimc_capture_unregister(struct vimc_ent_device *ved)
+{
+	struct vimc_capture_device *vcapture =
+		container_of(ved, struct vimc_capture_device, ved);
+
+	vb2_video_unregister_device(&vcapture->vdev);
+}
+
+static void *vimc_capture_process_frame(struct vimc_ent_device *ved,
+				    const void *frame)
+{
+	struct vimc_capture_device *vcapture = container_of(ved, struct vimc_capture_device,
+						    ved);
+	struct vimc_capture_buffer *vimc_buf;
+	void *vbuf;
+
+	spin_lock(&vcapture->qlock);
+
+	/* Get the first entry of the list */
+	vimc_buf = list_first_entry_or_null(&vcapture->buf_list,
+					    typeof(*vimc_buf), list);
+	if (!vimc_buf) {
+		spin_unlock(&vcapture->qlock);
+		return ERR_PTR(-EAGAIN);
+	}
+
+	/* Remove this entry from the list */
+	list_del(&vimc_buf->list);
+
+	spin_unlock(&vcapture->qlock);
+
+	/* Fill the buffer */
+	vimc_buf->vb2.vb2_buf.timestamp = ktime_get_ns();
+	vimc_buf->vb2.sequence = vcapture->sequence++;
+	vimc_buf->vb2.field = vcapture->format.field;
+
+	vbuf = vb2_plane_vaddr(&vimc_buf->vb2.vb2_buf, 0);
+
+	memcpy(vbuf, frame, vcapture->format.sizeimage);
+
+	/* Set it as ready */
+	vb2_set_plane_payload(&vimc_buf->vb2.vb2_buf, 0,
+			      vcapture->format.sizeimage);
+	vb2_buffer_done(&vimc_buf->vb2.vb2_buf, VB2_BUF_STATE_DONE);
+	return NULL;
+}
+
+static struct vimc_ent_device *vimc_capture_add(struct vimc_device *vimc,
+					    const char *vcfg_name)
+{
+	struct v4l2_device *v4l2_dev = &vimc->v4l2_dev;
+	const struct vimc_pix_map *vpix;
+	struct vimc_capture_device *vcapture;
+	struct video_device *vdev;
+	struct vb2_queue *q;
+	int ret;
+
+	/* Allocate the vimc_capture_device struct */
+	vcapture = kzalloc(sizeof(*vcapture), GFP_KERNEL);
+	if (!vcapture)
+		return ERR_PTR(-ENOMEM);
+
+	/* Initialize the media entity */
+	vcapture->vdev.entity.name = vcfg_name;
+	vcapture->vdev.entity.function = MEDIA_ENT_F_IO_V4L;
+	vcapture->pad.flags = MEDIA_PAD_FL_SINK;
+	ret = media_entity_pads_init(&vcapture->vdev.entity,
+				     1, &vcapture->pad);
+	if (ret)
+		goto err_free_vcapture;
+
+	/* Initialize the lock */
+	mutex_init(&vcapture->lock);
+
+	/* Initialize the vb2 queue */
+	q = &vcapture->queue;
+	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	q->io_modes = VB2_MMAP | VB2_DMABUF;
+	if (vimc_allocator == VIMC_ALLOCATOR_VMALLOC)
+		q->io_modes |= VB2_USERPTR;
+	q->drv_priv = vcapture;
+	q->buf_struct_size = sizeof(struct vimc_capture_buffer);
+	q->ops = &vimc_capture_qops;
+	q->mem_ops = vimc_allocator == VIMC_ALLOCATOR_DMA_CONTIG
+		   ? &vb2_dma_contig_memops : &vb2_vmalloc_memops;
+	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+	q->min_buffers_needed = 2;
+	q->lock = &vcapture->lock;
+	q->dev = v4l2_dev->dev;
+
+	ret = vb2_queue_init(q);
+	if (ret) {
+		dev_err(vimc->mdev.dev, "%s: vb2 queue init failed (err=%d)\n",
+			vcfg_name, ret);
+		goto err_clean_m_ent;
+	}
+
+	/* Initialize buffer list and its lock */
+	INIT_LIST_HEAD(&vcapture->buf_list);
+	spin_lock_init(&vcapture->qlock);
+
+	/* Set default frame format */
+	vcapture->format = fmt_default;
+	vpix = vimc_pix_map_by_pixelformat(vcapture->format.pixelformat);
+	vcapture->format.bytesperline = vcapture->format.width * vpix->bpp;
+	vcapture->format.sizeimage = vcapture->format.bytesperline *
+				 vcapture->format.height;
+
+	/* Fill the vimc_ent_device struct */
+	vcapture->ved.ent = &vcapture->vdev.entity;
+	vcapture->ved.process_frame = vimc_capture_process_frame;
+	vcapture->ved.vdev_get_format = vimc_capture_get_format;
+	vcapture->ved.dev = vimc->mdev.dev;
+
+	/* Initialize the video_device struct */
+	vdev = &vcapture->vdev;
+	vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING
+			  | V4L2_CAP_IO_MC;
+	vdev->entity.ops = &vimc_capture_mops;
+	vdev->release = video_device_release_empty;
+	vdev->fops = &vimc_capture_fops;
+	vdev->ioctl_ops = &vimc_capture_ioctl_ops;
+	vdev->lock = &vcapture->lock;
+	vdev->queue = q;
+	vdev->v4l2_dev = v4l2_dev;
+	vdev->vfl_dir = VFL_DIR_RX;
+	strscpy(vdev->name, vcfg_name, sizeof(vdev->name));
+	video_set_drvdata(vdev, &vcapture->ved);
+
+	/* Register the video_device with the v4l2 and the media framework */
+	ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
+	if (ret) {
+		dev_err(vimc->mdev.dev, "%s: video register failed (err=%d)\n",
+			vcapture->vdev.name, ret);
+		goto err_clean_m_ent;
+	}
+
+	return &vcapture->ved;
+
+err_clean_m_ent:
+	media_entity_cleanup(&vcapture->vdev.entity);
+err_free_vcapture:
+	kfree(vcapture);
+
+	return ERR_PTR(ret);
+}
+
+struct vimc_ent_type vimc_capture_type = {
+	.add = vimc_capture_add,
+	.unregister = vimc_capture_unregister,
+	.release = vimc_capture_release
+};