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, 337 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c
new file mode 100644
index 000000000..0b769ee71
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dccg.c
@@ -0,0 +1,337 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright 2022 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "reg_helper.h"
+#include "core_types.h"
+
+#include "dcn31/dcn31_dccg.h"
+#include "dcn314_dccg.h"
+
+#define TO_DCN_DCCG(dccg)\
+	container_of(dccg, struct dcn_dccg, base)
+
+#define REG(reg) \
+	(dccg_dcn->regs->reg)
+
+#undef FN
+#define FN(reg_name, field_name) \
+	dccg_dcn->dccg_shift->field_name, dccg_dcn->dccg_mask->field_name
+
+#define CTX \
+	dccg_dcn->base.ctx
+#define DC_LOGGER \
+	dccg->ctx->logger
+
+static void dccg314_get_pixel_rate_div(
+		struct dccg *dccg,
+		uint32_t otg_inst,
+		enum pixel_rate_div *k1,
+		enum pixel_rate_div *k2)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+	uint32_t val_k1 = PIXEL_RATE_DIV_NA, val_k2 = PIXEL_RATE_DIV_NA;
+
+	*k1 = PIXEL_RATE_DIV_NA;
+	*k2 = PIXEL_RATE_DIV_NA;
+
+	switch (otg_inst) {
+	case 0:
+		REG_GET_2(OTG_PIXEL_RATE_DIV,
+			OTG0_PIXEL_RATE_DIVK1, &val_k1,
+			OTG0_PIXEL_RATE_DIVK2, &val_k2);
+		break;
+	case 1:
+		REG_GET_2(OTG_PIXEL_RATE_DIV,
+			OTG1_PIXEL_RATE_DIVK1, &val_k1,
+			OTG1_PIXEL_RATE_DIVK2, &val_k2);
+		break;
+	case 2:
+		REG_GET_2(OTG_PIXEL_RATE_DIV,
+			OTG2_PIXEL_RATE_DIVK1, &val_k1,
+			OTG2_PIXEL_RATE_DIVK2, &val_k2);
+		break;
+	case 3:
+		REG_GET_2(OTG_PIXEL_RATE_DIV,
+			OTG3_PIXEL_RATE_DIVK1, &val_k1,
+			OTG3_PIXEL_RATE_DIVK2, &val_k2);
+		break;
+	default:
+		BREAK_TO_DEBUGGER();
+		return;
+	}
+
+	*k1 = (enum pixel_rate_div)val_k1;
+	*k2 = (enum pixel_rate_div)val_k2;
+}
+
+static void dccg314_set_pixel_rate_div(
+		struct dccg *dccg,
+		uint32_t otg_inst,
+		enum pixel_rate_div k1,
+		enum pixel_rate_div k2)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+	enum pixel_rate_div cur_k1 = PIXEL_RATE_DIV_NA, cur_k2 = PIXEL_RATE_DIV_NA;
+
+	// Don't program 0xF into the register field. Not valid since
+	// K1 / K2 field is only 1 / 2 bits wide
+	if (k1 == PIXEL_RATE_DIV_NA || k2 == PIXEL_RATE_DIV_NA) {
+		BREAK_TO_DEBUGGER();
+		return;
+	}
+
+	dccg314_get_pixel_rate_div(dccg, otg_inst, &cur_k1, &cur_k2);
+	if (k1 == cur_k1 && k2 == cur_k2)
+		return;
+
+	switch (otg_inst) {
+	case 0:
+		REG_UPDATE_2(OTG_PIXEL_RATE_DIV,
+				OTG0_PIXEL_RATE_DIVK1, k1,
+				OTG0_PIXEL_RATE_DIVK2, k2);
+		break;
+	case 1:
+		REG_UPDATE_2(OTG_PIXEL_RATE_DIV,
+				OTG1_PIXEL_RATE_DIVK1, k1,
+				OTG1_PIXEL_RATE_DIVK2, k2);
+		break;
+	case 2:
+		REG_UPDATE_2(OTG_PIXEL_RATE_DIV,
+				OTG2_PIXEL_RATE_DIVK1, k1,
+				OTG2_PIXEL_RATE_DIVK2, k2);
+		break;
+	case 3:
+		REG_UPDATE_2(OTG_PIXEL_RATE_DIV,
+				OTG3_PIXEL_RATE_DIVK1, k1,
+				OTG3_PIXEL_RATE_DIVK2, k2);
+		break;
+	default:
+		BREAK_TO_DEBUGGER();
+		return;
+	}
+}
+
+static void dccg314_set_dtbclk_p_src(
+		struct dccg *dccg,
+		enum streamclk_source src,
+		uint32_t otg_inst)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+
+	uint32_t p_src_sel = 0; /* selects dprefclk */
+
+	if (src == DTBCLK0)
+		p_src_sel = 2;  /* selects dtbclk0 */
+
+	switch (otg_inst) {
+	case 0:
+		if (src == REFCLK)
+			REG_UPDATE(DTBCLK_P_CNTL,
+					DTBCLK_P0_EN, 0);
+		else
+			REG_UPDATE_2(DTBCLK_P_CNTL,
+					DTBCLK_P0_SRC_SEL, p_src_sel,
+					DTBCLK_P0_EN, 1);
+		break;
+	case 1:
+		if (src == REFCLK)
+			REG_UPDATE(DTBCLK_P_CNTL,
+					DTBCLK_P1_EN, 0);
+		else
+			REG_UPDATE_2(DTBCLK_P_CNTL,
+					DTBCLK_P1_SRC_SEL, p_src_sel,
+					DTBCLK_P1_EN, 1);
+		break;
+	case 2:
+		if (src == REFCLK)
+			REG_UPDATE(DTBCLK_P_CNTL,
+					DTBCLK_P2_EN, 0);
+		else
+			REG_UPDATE_2(DTBCLK_P_CNTL,
+					DTBCLK_P2_SRC_SEL, p_src_sel,
+					DTBCLK_P2_EN, 1);
+		break;
+	case 3:
+		if (src == REFCLK)
+			REG_UPDATE(DTBCLK_P_CNTL,
+					DTBCLK_P3_EN, 0);
+		else
+			REG_UPDATE_2(DTBCLK_P_CNTL,
+					DTBCLK_P3_SRC_SEL, p_src_sel,
+					DTBCLK_P3_EN, 1);
+		break;
+	default:
+		BREAK_TO_DEBUGGER();
+		return;
+	}
+
+}
+
+/* Controls the generation of pixel valid for OTG in (OTG -> HPO case) */
+static void dccg314_set_dtbclk_dto(
+		struct dccg *dccg,
+		const struct dtbclk_dto_params *params)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+	/* DTO Output Rate / Pixel Rate = 1/4 */
+	int req_dtbclk_khz = params->pixclk_khz / 4;
+
+	if (params->ref_dtbclk_khz && req_dtbclk_khz) {
+		uint32_t modulo, phase;
+
+		// phase / modulo = dtbclk / dtbclk ref
+		modulo = params->ref_dtbclk_khz * 1000;
+		phase = req_dtbclk_khz * 1000;
+
+		REG_WRITE(DTBCLK_DTO_MODULO[params->otg_inst], modulo);
+		REG_WRITE(DTBCLK_DTO_PHASE[params->otg_inst], phase);
+
+		REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst],
+				DTBCLK_DTO_ENABLE[params->otg_inst], 1);
+
+		REG_WAIT(OTG_PIXEL_RATE_CNTL[params->otg_inst],
+				DTBCLKDTO_ENABLE_STATUS[params->otg_inst], 1,
+				1, 100);
+
+		/* program OTG_PIXEL_RATE_DIV for DIVK1 and DIVK2 fields */
+		dccg314_set_pixel_rate_div(dccg, params->otg_inst, PIXEL_RATE_DIV_BY_1, PIXEL_RATE_DIV_BY_1);
+
+		/* The recommended programming sequence to enable DTBCLK DTO to generate
+		 * valid pixel HPO DPSTREAM ENCODER, specifies that DTO source select should
+		 * be set only after DTO is enabled
+		 */
+		REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst],
+				PIPE_DTO_SRC_SEL[params->otg_inst], 2);
+	} else {
+		REG_UPDATE_2(OTG_PIXEL_RATE_CNTL[params->otg_inst],
+				DTBCLK_DTO_ENABLE[params->otg_inst], 0,
+				PIPE_DTO_SRC_SEL[params->otg_inst], 1);
+
+		REG_WRITE(DTBCLK_DTO_MODULO[params->otg_inst], 0);
+		REG_WRITE(DTBCLK_DTO_PHASE[params->otg_inst], 0);
+	}
+}
+
+static void dccg314_set_dpstreamclk(
+		struct dccg *dccg,
+		enum streamclk_source src,
+		int otg_inst,
+		int dp_hpo_inst)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+
+	/* set the dtbclk_p source */
+	dccg314_set_dtbclk_p_src(dccg, src, otg_inst);
+
+	/* enabled to select one of the DTBCLKs for pipe */
+	switch (dp_hpo_inst) {
+	case 0:
+		REG_UPDATE_2(DPSTREAMCLK_CNTL,
+					DPSTREAMCLK0_EN, (src == REFCLK) ? 0 : 1,
+					DPSTREAMCLK0_SRC_SEL, otg_inst);
+		break;
+	case 1:
+		REG_UPDATE_2(DPSTREAMCLK_CNTL,
+					DPSTREAMCLK1_EN, (src == REFCLK) ? 0 : 1,
+					DPSTREAMCLK1_SRC_SEL, otg_inst);
+		break;
+	case 2:
+		REG_UPDATE_2(DPSTREAMCLK_CNTL,
+					DPSTREAMCLK2_EN, (src == REFCLK) ? 0 : 1,
+					DPSTREAMCLK2_SRC_SEL, otg_inst);
+		break;
+	case 3:
+		REG_UPDATE_2(DPSTREAMCLK_CNTL,
+					DPSTREAMCLK3_EN, (src == REFCLK) ? 0 : 1,
+					DPSTREAMCLK3_SRC_SEL, otg_inst);
+		break;
+	default:
+		BREAK_TO_DEBUGGER();
+		return;
+	}
+}
+
+static void dccg314_set_valid_pixel_rate(
+		struct dccg *dccg,
+		int ref_dtbclk_khz,
+		int otg_inst,
+		int pixclk_khz)
+{
+	struct dtbclk_dto_params dto_params = {0};
+
+	dto_params.ref_dtbclk_khz = ref_dtbclk_khz;
+	dto_params.otg_inst = otg_inst;
+	dto_params.pixclk_khz = pixclk_khz;
+
+	dccg314_set_dtbclk_dto(dccg, &dto_params);
+}
+
+static const struct dccg_funcs dccg314_funcs = {
+	.update_dpp_dto = dccg31_update_dpp_dto,
+	.get_dccg_ref_freq = dccg31_get_dccg_ref_freq,
+	.dccg_init = dccg31_init,
+	.set_dpstreamclk = dccg314_set_dpstreamclk,
+	.enable_symclk32_se = dccg31_enable_symclk32_se,
+	.disable_symclk32_se = dccg31_disable_symclk32_se,
+	.enable_symclk32_le = dccg31_enable_symclk32_le,
+	.disable_symclk32_le = dccg31_disable_symclk32_le,
+	.set_physymclk = dccg31_set_physymclk,
+	.set_dtbclk_dto = dccg314_set_dtbclk_dto,
+	.set_audio_dtbclk_dto = dccg31_set_audio_dtbclk_dto,
+	.set_fifo_errdet_ovr_en = dccg2_set_fifo_errdet_ovr_en,
+	.otg_add_pixel = dccg31_otg_add_pixel,
+	.otg_drop_pixel = dccg31_otg_drop_pixel,
+	.set_dispclk_change_mode = dccg31_set_dispclk_change_mode,
+	.disable_dsc = dccg31_disable_dscclk,
+	.enable_dsc = dccg31_enable_dscclk,
+	.set_pixel_rate_div = dccg314_set_pixel_rate_div,
+	.set_valid_pixel_rate = dccg314_set_valid_pixel_rate,
+};
+
+struct dccg *dccg314_create(
+	struct dc_context *ctx,
+	const struct dccg_registers *regs,
+	const struct dccg_shift *dccg_shift,
+	const struct dccg_mask *dccg_mask)
+{
+	struct dcn_dccg *dccg_dcn = kzalloc(sizeof(*dccg_dcn), GFP_KERNEL);
+	struct dccg *base;
+
+	if (dccg_dcn == NULL) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	base = &dccg_dcn->base;
+	base->ctx = ctx;
+	base->funcs = &dccg314_funcs;
+
+	dccg_dcn->regs = regs;
+	dccg_dcn->dccg_shift = dccg_shift;
+	dccg_dcn->dccg_mask = dccg_mask;
+
+	return &dccg_dcn->base;
+}