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, 444 insertions, 0 deletions

diff --git a/drivers/media/test-drivers/vimc/vimc-scaler.c b/drivers/media/test-drivers/vimc/vimc-scaler.c
new file mode 100644
index 000000000..b671774e2
--- /dev/null
+++ b/drivers/media/test-drivers/vimc/vimc-scaler.c
@@ -0,0 +1,444 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * vimc-scaler.c Virtual Media Controller Driver
+ *
+ * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.com>
+ */
+
+#include <linux/moduleparam.h>
+#include <linux/string.h>
+#include <linux/vmalloc.h>
+#include <linux/v4l2-mediabus.h>
+#include <media/v4l2-rect.h>
+#include <media/v4l2-subdev.h>
+
+#include "vimc-common.h"
+
+/* Pad identifier */
+enum vic_sca_pad {
+	VIMC_SCALER_SINK = 0,
+	VIMC_SCALER_SRC = 1,
+};
+
+#define VIMC_SCALER_FMT_WIDTH_DEFAULT  640
+#define VIMC_SCALER_FMT_HEIGHT_DEFAULT 480
+
+struct vimc_scaler_device {
+	struct vimc_ent_device ved;
+	struct v4l2_subdev sd;
+	struct v4l2_rect crop_rect;
+	/* Frame format for both sink and src pad */
+	struct v4l2_mbus_framefmt fmt[2];
+	/* Values calculated when the stream starts */
+	u8 *src_frame;
+	unsigned int bpp;
+	struct media_pad pads[2];
+};
+
+static const struct v4l2_mbus_framefmt fmt_default = {
+	.width = VIMC_SCALER_FMT_WIDTH_DEFAULT,
+	.height = VIMC_SCALER_FMT_HEIGHT_DEFAULT,
+	.code = MEDIA_BUS_FMT_RGB888_1X24,
+	.field = V4L2_FIELD_NONE,
+	.colorspace = V4L2_COLORSPACE_SRGB,
+};
+
+static const struct v4l2_rect crop_rect_default = {
+	.width = VIMC_SCALER_FMT_WIDTH_DEFAULT,
+	.height = VIMC_SCALER_FMT_HEIGHT_DEFAULT,
+	.top = 0,
+	.left = 0,
+};
+
+static const struct v4l2_rect crop_rect_min = {
+	.width = VIMC_FRAME_MIN_WIDTH,
+	.height = VIMC_FRAME_MIN_HEIGHT,
+	.top = 0,
+	.left = 0,
+};
+
+static struct v4l2_rect
+vimc_scaler_get_crop_bound_sink(const struct v4l2_mbus_framefmt *sink_fmt)
+{
+	/* Get the crop bounds to clamp the crop rectangle correctly */
+	struct v4l2_rect r = {
+		.left = 0,
+		.top = 0,
+		.width = sink_fmt->width,
+		.height = sink_fmt->height,
+	};
+	return r;
+}
+
+static int vimc_scaler_init_cfg(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_state *sd_state)
+{
+	struct v4l2_mbus_framefmt *mf;
+	struct v4l2_rect *r;
+	unsigned int i;
+
+	for (i = 0; i < sd->entity.num_pads; i++) {
+		mf = v4l2_subdev_get_try_format(sd, sd_state, i);
+		*mf = fmt_default;
+	}
+
+	r = v4l2_subdev_get_try_crop(sd, sd_state, VIMC_SCALER_SINK);
+	*r = crop_rect_default;
+
+	return 0;
+}
+
+static int vimc_scaler_enum_mbus_code(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_state *sd_state,
+				   struct v4l2_subdev_mbus_code_enum *code)
+{
+	u32 mbus_code = vimc_mbus_code_by_index(code->index);
+	const struct vimc_pix_map *vpix;
+
+	if (!mbus_code)
+		return -EINVAL;
+
+	vpix = vimc_pix_map_by_code(mbus_code);
+
+	/* We don't support bayer format */
+	if (!vpix || vpix->bayer)
+		return -EINVAL;
+
+	code->code = mbus_code;
+
+	return 0;
+}
+
+static int vimc_scaler_enum_frame_size(struct v4l2_subdev *sd,
+				    struct v4l2_subdev_state *sd_state,
+				    struct v4l2_subdev_frame_size_enum *fse)
+{
+	const struct vimc_pix_map *vpix;
+
+	if (fse->index)
+		return -EINVAL;
+
+	/* Only accept code in the pix map table in non bayer format */
+	vpix = vimc_pix_map_by_code(fse->code);
+	if (!vpix || vpix->bayer)
+		return -EINVAL;
+
+	fse->min_width = VIMC_FRAME_MIN_WIDTH;
+	fse->min_height = VIMC_FRAME_MIN_HEIGHT;
+
+	fse->max_width = VIMC_FRAME_MAX_WIDTH;
+	fse->max_height = VIMC_FRAME_MAX_HEIGHT;
+
+	return 0;
+}
+
+static struct v4l2_mbus_framefmt *
+vimc_scaler_pad_format(struct vimc_scaler_device *vscaler,
+		    struct v4l2_subdev_state *sd_state, u32 pad,
+		    enum v4l2_subdev_format_whence which)
+{
+	if (which == V4L2_SUBDEV_FORMAT_TRY)
+		return v4l2_subdev_get_try_format(&vscaler->sd, sd_state, pad);
+	else
+		return &vscaler->fmt[pad];
+}
+
+static struct v4l2_rect *
+vimc_scaler_pad_crop(struct vimc_scaler_device *vscaler,
+		  struct v4l2_subdev_state *sd_state,
+		  enum v4l2_subdev_format_whence which)
+{
+	if (which == V4L2_SUBDEV_FORMAT_TRY)
+		return v4l2_subdev_get_try_crop(&vscaler->sd, sd_state,
+						VIMC_SCALER_SINK);
+	else
+		return &vscaler->crop_rect;
+}
+
+static int vimc_scaler_get_fmt(struct v4l2_subdev *sd,
+			    struct v4l2_subdev_state *sd_state,
+			    struct v4l2_subdev_format *format)
+{
+	struct vimc_scaler_device *vscaler = v4l2_get_subdevdata(sd);
+
+	format->format = *vimc_scaler_pad_format(vscaler, sd_state, format->pad,
+					      format->which);
+	return 0;
+}
+
+static int vimc_scaler_set_fmt(struct v4l2_subdev *sd,
+			    struct v4l2_subdev_state *sd_state,
+			    struct v4l2_subdev_format *format)
+{
+	struct vimc_scaler_device *vscaler = v4l2_get_subdevdata(sd);
+	struct v4l2_mbus_framefmt *fmt;
+
+	/* Do not change the active format while stream is on */
+	if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE && vscaler->src_frame)
+		return -EBUSY;
+
+	fmt = vimc_scaler_pad_format(vscaler, sd_state, format->pad, format->which);
+
+	/*
+	 * The media bus code and colorspace can only be changed on the sink
+	 * pad, the source pad only follows.
+	 */
+	if (format->pad == VIMC_SCALER_SINK) {
+		const struct vimc_pix_map *vpix;
+
+		/* Only accept code in the pix map table in non bayer format. */
+		vpix = vimc_pix_map_by_code(format->format.code);
+		if (vpix && !vpix->bayer)
+			fmt->code = format->format.code;
+		else
+			fmt->code = fmt_default.code;
+
+		/* Clamp the colorspace to valid values. */
+		fmt->colorspace = format->format.colorspace;
+		fmt->ycbcr_enc = format->format.ycbcr_enc;
+		fmt->quantization = format->format.quantization;
+		fmt->xfer_func = format->format.xfer_func;
+		vimc_colorimetry_clamp(fmt);
+	}
+
+	/* Clamp and align the width and height */
+	fmt->width = clamp_t(u32, format->format.width, VIMC_FRAME_MIN_WIDTH,
+			     VIMC_FRAME_MAX_WIDTH) & ~1;
+	fmt->height = clamp_t(u32, format->format.height, VIMC_FRAME_MIN_HEIGHT,
+			      VIMC_FRAME_MAX_HEIGHT) & ~1;
+
+	/*
+	 * Propagate the sink pad format to the crop rectangle and the source
+	 * pad.
+	 */
+	if (format->pad == VIMC_SCALER_SINK) {
+		struct v4l2_mbus_framefmt *src_fmt;
+		struct v4l2_rect *crop;
+
+		crop = vimc_scaler_pad_crop(vscaler, sd_state, format->which);
+		crop->width = fmt->width;
+		crop->height = fmt->height;
+		crop->top = 0;
+		crop->left = 0;
+
+		src_fmt = vimc_scaler_pad_format(vscaler, sd_state, VIMC_SCALER_SRC,
+					      format->which);
+		*src_fmt = *fmt;
+	}
+
+	format->format = *fmt;
+
+	return 0;
+}
+
+static int vimc_scaler_get_selection(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *sd_state,
+				  struct v4l2_subdev_selection *sel)
+{
+	struct vimc_scaler_device *vscaler = v4l2_get_subdevdata(sd);
+	struct v4l2_mbus_framefmt *sink_fmt;
+
+	if (VIMC_IS_SRC(sel->pad))
+		return -EINVAL;
+
+	switch (sel->target) {
+	case V4L2_SEL_TGT_CROP:
+		sel->r = *vimc_scaler_pad_crop(vscaler, sd_state, sel->which);
+		break;
+	case V4L2_SEL_TGT_CROP_BOUNDS:
+		sink_fmt = vimc_scaler_pad_format(vscaler, sd_state, VIMC_SCALER_SINK,
+					       sel->which);
+		sel->r = vimc_scaler_get_crop_bound_sink(sink_fmt);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void vimc_scaler_adjust_sink_crop(struct v4l2_rect *r,
+				      const struct v4l2_mbus_framefmt *sink_fmt)
+{
+	const struct v4l2_rect sink_rect =
+		vimc_scaler_get_crop_bound_sink(sink_fmt);
+
+	/* Disallow rectangles smaller than the minimal one. */
+	v4l2_rect_set_min_size(r, &crop_rect_min);
+	v4l2_rect_map_inside(r, &sink_rect);
+}
+
+static int vimc_scaler_set_selection(struct v4l2_subdev *sd,
+				  struct v4l2_subdev_state *sd_state,
+				  struct v4l2_subdev_selection *sel)
+{
+	struct vimc_scaler_device *vscaler = v4l2_get_subdevdata(sd);
+	struct v4l2_mbus_framefmt *sink_fmt;
+	struct v4l2_rect *crop_rect;
+
+	/* Only support setting the crop of the sink pad */
+	if (VIMC_IS_SRC(sel->pad) || sel->target != V4L2_SEL_TGT_CROP)
+		return -EINVAL;
+
+	if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE && vscaler->src_frame)
+		return -EBUSY;
+
+	crop_rect = vimc_scaler_pad_crop(vscaler, sd_state, sel->which);
+	sink_fmt = vimc_scaler_pad_format(vscaler, sd_state, VIMC_SCALER_SINK,
+				       sel->which);
+	vimc_scaler_adjust_sink_crop(&sel->r, sink_fmt);
+	*crop_rect = sel->r;
+
+	return 0;
+}
+
+static const struct v4l2_subdev_pad_ops vimc_scaler_pad_ops = {
+	.init_cfg		= vimc_scaler_init_cfg,
+	.enum_mbus_code		= vimc_scaler_enum_mbus_code,
+	.enum_frame_size	= vimc_scaler_enum_frame_size,
+	.get_fmt		= vimc_scaler_get_fmt,
+	.set_fmt		= vimc_scaler_set_fmt,
+	.get_selection		= vimc_scaler_get_selection,
+	.set_selection		= vimc_scaler_set_selection,
+};
+
+static int vimc_scaler_s_stream(struct v4l2_subdev *sd, int enable)
+{
+	struct vimc_scaler_device *vscaler = v4l2_get_subdevdata(sd);
+
+	if (enable) {
+		const struct vimc_pix_map *vpix;
+		unsigned int frame_size;
+
+		if (vscaler->src_frame)
+			return 0;
+
+		/* Save the bytes per pixel of the sink */
+		vpix = vimc_pix_map_by_code(vscaler->fmt[VIMC_SCALER_SINK].code);
+		vscaler->bpp = vpix->bpp;
+
+		/* Calculate the frame size of the source pad */
+		frame_size = vscaler->fmt[VIMC_SCALER_SRC].width
+			   * vscaler->fmt[VIMC_SCALER_SRC].height * vscaler->bpp;
+
+		/* Allocate the frame buffer. Use vmalloc to be able to
+		 * allocate a large amount of memory
+		 */
+		vscaler->src_frame = vmalloc(frame_size);
+		if (!vscaler->src_frame)
+			return -ENOMEM;
+
+	} else {
+		if (!vscaler->src_frame)
+			return 0;
+
+		vfree(vscaler->src_frame);
+		vscaler->src_frame = NULL;
+	}
+
+	return 0;
+}
+
+static const struct v4l2_subdev_video_ops vimc_scaler_video_ops = {
+	.s_stream = vimc_scaler_s_stream,
+};
+
+static const struct v4l2_subdev_ops vimc_scaler_ops = {
+	.pad = &vimc_scaler_pad_ops,
+	.video = &vimc_scaler_video_ops,
+};
+
+static void vimc_scaler_fill_src_frame(const struct vimc_scaler_device *const vscaler,
+				    const u8 *const sink_frame)
+{
+	const struct v4l2_mbus_framefmt *src_fmt = &vscaler->fmt[VIMC_SCALER_SRC];
+	const struct v4l2_rect *r = &vscaler->crop_rect;
+	unsigned int snk_width = vscaler->fmt[VIMC_SCALER_SINK].width;
+	unsigned int src_x, src_y;
+	u8 *walker = vscaler->src_frame;
+
+	/* Set each pixel at the src_frame to its sink_frame equivalent */
+	for (src_y = 0; src_y < src_fmt->height; src_y++) {
+		unsigned int snk_y, y_offset;
+
+		snk_y = (src_y * r->height) / src_fmt->height + r->top;
+		y_offset = snk_y * snk_width * vscaler->bpp;
+
+		for (src_x = 0; src_x < src_fmt->width; src_x++) {
+			unsigned int snk_x, x_offset, index;
+
+			snk_x = (src_x * r->width) / src_fmt->width + r->left;
+			x_offset = snk_x * vscaler->bpp;
+			index = y_offset + x_offset;
+			memcpy(walker, &sink_frame[index], vscaler->bpp);
+			walker += vscaler->bpp;
+		}
+	}
+}
+
+static void *vimc_scaler_process_frame(struct vimc_ent_device *ved,
+				    const void *sink_frame)
+{
+	struct vimc_scaler_device *vscaler = container_of(ved, struct vimc_scaler_device,
+						    ved);
+
+	/* If the stream in this node is not active, just return */
+	if (!vscaler->src_frame)
+		return ERR_PTR(-EINVAL);
+
+	vimc_scaler_fill_src_frame(vscaler, sink_frame);
+
+	return vscaler->src_frame;
+};
+
+static void vimc_scaler_release(struct vimc_ent_device *ved)
+{
+	struct vimc_scaler_device *vscaler =
+		container_of(ved, struct vimc_scaler_device, ved);
+
+	media_entity_cleanup(vscaler->ved.ent);
+	kfree(vscaler);
+}
+
+static struct vimc_ent_device *vimc_scaler_add(struct vimc_device *vimc,
+					    const char *vcfg_name)
+{
+	struct v4l2_device *v4l2_dev = &vimc->v4l2_dev;
+	struct vimc_scaler_device *vscaler;
+	int ret;
+
+	/* Allocate the vscaler struct */
+	vscaler = kzalloc(sizeof(*vscaler), GFP_KERNEL);
+	if (!vscaler)
+		return ERR_PTR(-ENOMEM);
+
+	/* Initialize ved and sd */
+	vscaler->pads[VIMC_SCALER_SINK].flags = MEDIA_PAD_FL_SINK;
+	vscaler->pads[VIMC_SCALER_SRC].flags = MEDIA_PAD_FL_SOURCE;
+
+	ret = vimc_ent_sd_register(&vscaler->ved, &vscaler->sd, v4l2_dev,
+				   vcfg_name,
+				   MEDIA_ENT_F_PROC_VIDEO_SCALER, 2,
+				   vscaler->pads, &vimc_scaler_ops);
+	if (ret) {
+		kfree(vscaler);
+		return ERR_PTR(ret);
+	}
+
+	vscaler->ved.process_frame = vimc_scaler_process_frame;
+	vscaler->ved.dev = vimc->mdev.dev;
+
+	/* Initialize the frame format */
+	vscaler->fmt[VIMC_SCALER_SINK] = fmt_default;
+	vscaler->fmt[VIMC_SCALER_SRC] = fmt_default;
+
+	/* Initialize the crop selection */
+	vscaler->crop_rect = crop_rect_default;
+
+	return &vscaler->ved;
+}
+
+struct vimc_ent_type vimc_scaler_type = {
+	.add = vimc_scaler_add,
+	.release = vimc_scaler_release
+};