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, 538 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc.c b/drivers/gpu/drm/i915/gt/uc/intel_huc.c
new file mode 100644
index 000000000..410905da8
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc.c
@@ -0,0 +1,538 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2016-2019 Intel Corporation
+ */
+
+#include <linux/types.h>
+
+#include "gt/intel_gt.h"
+#include "intel_guc_reg.h"
+#include "intel_huc.h"
+#include "i915_drv.h"
+
+#include <linux/device/bus.h>
+#include <linux/mei_aux.h>
+
+/**
+ * DOC: HuC
+ *
+ * The HuC is a dedicated microcontroller for usage in media HEVC (High
+ * Efficiency Video Coding) operations. Userspace can directly use the firmware
+ * capabilities by adding HuC specific commands to batch buffers.
+ *
+ * The kernel driver is only responsible for loading the HuC firmware and
+ * triggering its security authentication, which is performed by the GuC on
+ * older platforms and by the GSC on newer ones. For the GuC to correctly
+ * perform the authentication, the HuC binary must be loaded before the GuC one.
+ * Loading the HuC is optional; however, not using the HuC might negatively
+ * impact power usage and/or performance of media workloads, depending on the
+ * use-cases.
+ * HuC must be reloaded on events that cause the WOPCM to lose its contents
+ * (S3/S4, FLR); GuC-authenticated HuC must also be reloaded on GuC/GT reset,
+ * while GSC-managed HuC will survive that.
+ *
+ * See https://github.com/intel/media-driver for the latest details on HuC
+ * functionality.
+ */
+
+/**
+ * DOC: HuC Memory Management
+ *
+ * Similarly to the GuC, the HuC can't do any memory allocations on its own,
+ * with the difference being that the allocations for HuC usage are handled by
+ * the userspace driver instead of the kernel one. The HuC accesses the memory
+ * via the PPGTT belonging to the context loaded on the VCS executing the
+ * HuC-specific commands.
+ */
+
+/*
+ * MEI-GSC load is an async process. The probing of the exposed aux device
+ * (see intel_gsc.c) usually happens a few seconds after i915 probe, depending
+ * on when the kernel schedules it. Unless something goes terribly wrong, we're
+ * guaranteed for this to happen during boot, so the big timeout is a safety net
+ * that we never expect to need.
+ * MEI-PXP + HuC load usually takes ~300ms, but if the GSC needs to be resumed
+ * and/or reset, this can take longer. Note that the kernel might schedule
+ * other work between the i915 init/resume and the MEI one, which can add to
+ * the delay.
+ */
+#define GSC_INIT_TIMEOUT_MS 10000
+#define PXP_INIT_TIMEOUT_MS 5000
+
+static int sw_fence_dummy_notify(struct i915_sw_fence *sf,
+				 enum i915_sw_fence_notify state)
+{
+	return NOTIFY_DONE;
+}
+
+static void __delayed_huc_load_complete(struct intel_huc *huc)
+{
+	if (!i915_sw_fence_done(&huc->delayed_load.fence))
+		i915_sw_fence_complete(&huc->delayed_load.fence);
+}
+
+static void delayed_huc_load_complete(struct intel_huc *huc)
+{
+	hrtimer_cancel(&huc->delayed_load.timer);
+	__delayed_huc_load_complete(huc);
+}
+
+static void __gsc_init_error(struct intel_huc *huc)
+{
+	huc->delayed_load.status = INTEL_HUC_DELAYED_LOAD_ERROR;
+	__delayed_huc_load_complete(huc);
+}
+
+static void gsc_init_error(struct intel_huc *huc)
+{
+	hrtimer_cancel(&huc->delayed_load.timer);
+	__gsc_init_error(huc);
+}
+
+static void gsc_init_done(struct intel_huc *huc)
+{
+	hrtimer_cancel(&huc->delayed_load.timer);
+
+	/* MEI-GSC init is done, now we wait for MEI-PXP to bind */
+	huc->delayed_load.status = INTEL_HUC_WAITING_ON_PXP;
+	if (!i915_sw_fence_done(&huc->delayed_load.fence))
+		hrtimer_start(&huc->delayed_load.timer,
+			      ms_to_ktime(PXP_INIT_TIMEOUT_MS),
+			      HRTIMER_MODE_REL);
+}
+
+static enum hrtimer_restart huc_delayed_load_timer_callback(struct hrtimer *hrtimer)
+{
+	struct intel_huc *huc = container_of(hrtimer, struct intel_huc, delayed_load.timer);
+
+	if (!intel_huc_is_authenticated(huc)) {
+		if (huc->delayed_load.status == INTEL_HUC_WAITING_ON_GSC)
+			drm_notice(&huc_to_gt(huc)->i915->drm,
+				   "timed out waiting for MEI GSC init to load HuC\n");
+		else if (huc->delayed_load.status == INTEL_HUC_WAITING_ON_PXP)
+			drm_notice(&huc_to_gt(huc)->i915->drm,
+				   "timed out waiting for MEI PXP init to load HuC\n");
+		else
+			MISSING_CASE(huc->delayed_load.status);
+
+		__gsc_init_error(huc);
+	}
+
+	return HRTIMER_NORESTART;
+}
+
+static void huc_delayed_load_start(struct intel_huc *huc)
+{
+	ktime_t delay;
+
+	GEM_BUG_ON(intel_huc_is_authenticated(huc));
+
+	/*
+	 * On resume we don't have to wait for MEI-GSC to be re-probed, but we
+	 * do need to wait for MEI-PXP to reset & re-bind
+	 */
+	switch (huc->delayed_load.status) {
+	case INTEL_HUC_WAITING_ON_GSC:
+		delay = ms_to_ktime(GSC_INIT_TIMEOUT_MS);
+		break;
+	case INTEL_HUC_WAITING_ON_PXP:
+		delay = ms_to_ktime(PXP_INIT_TIMEOUT_MS);
+		break;
+	default:
+		gsc_init_error(huc);
+		return;
+	}
+
+	/*
+	 * This fence is always complete unless we're waiting for the
+	 * GSC device to come up to load the HuC. We arm the fence here
+	 * and complete it when we confirm that the HuC is loaded from
+	 * the PXP bind callback.
+	 */
+	GEM_BUG_ON(!i915_sw_fence_done(&huc->delayed_load.fence));
+	i915_sw_fence_fini(&huc->delayed_load.fence);
+	i915_sw_fence_reinit(&huc->delayed_load.fence);
+	i915_sw_fence_await(&huc->delayed_load.fence);
+	i915_sw_fence_commit(&huc->delayed_load.fence);
+
+	hrtimer_start(&huc->delayed_load.timer, delay, HRTIMER_MODE_REL);
+}
+
+static int gsc_notifier(struct notifier_block *nb, unsigned long action, void *data)
+{
+	struct device *dev = data;
+	struct intel_huc *huc = container_of(nb, struct intel_huc, delayed_load.nb);
+	struct intel_gsc_intf *intf = &huc_to_gt(huc)->gsc.intf[0];
+
+	if (!intf->adev || &intf->adev->aux_dev.dev != dev)
+		return 0;
+
+	switch (action) {
+	case BUS_NOTIFY_BOUND_DRIVER: /* mei driver bound to aux device */
+		gsc_init_done(huc);
+		break;
+
+	case BUS_NOTIFY_DRIVER_NOT_BOUND: /* mei driver fails to be bound */
+	case BUS_NOTIFY_UNBIND_DRIVER: /* mei driver about to be unbound */
+		drm_info(&huc_to_gt(huc)->i915->drm,
+			 "mei driver not bound, disabling HuC load\n");
+		gsc_init_error(huc);
+		break;
+	}
+
+	return 0;
+}
+
+void intel_huc_register_gsc_notifier(struct intel_huc *huc, struct bus_type *bus)
+{
+	int ret;
+
+	if (!intel_huc_is_loaded_by_gsc(huc))
+		return;
+
+	huc->delayed_load.nb.notifier_call = gsc_notifier;
+	ret = bus_register_notifier(bus, &huc->delayed_load.nb);
+	if (ret) {
+		drm_err(&huc_to_gt(huc)->i915->drm,
+			"failed to register GSC notifier\n");
+		huc->delayed_load.nb.notifier_call = NULL;
+		gsc_init_error(huc);
+	}
+}
+
+void intel_huc_unregister_gsc_notifier(struct intel_huc *huc, struct bus_type *bus)
+{
+	if (!huc->delayed_load.nb.notifier_call)
+		return;
+
+	delayed_huc_load_complete(huc);
+
+	bus_unregister_notifier(bus, &huc->delayed_load.nb);
+	huc->delayed_load.nb.notifier_call = NULL;
+}
+
+static void delayed_huc_load_init(struct intel_huc *huc)
+{
+	/*
+	 * Initialize fence to be complete as this is expected to be complete
+	 * unless there is a delayed HuC load in progress.
+	 */
+	i915_sw_fence_init(&huc->delayed_load.fence,
+			   sw_fence_dummy_notify);
+	i915_sw_fence_commit(&huc->delayed_load.fence);
+
+	hrtimer_init(&huc->delayed_load.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+	huc->delayed_load.timer.function = huc_delayed_load_timer_callback;
+}
+
+static void delayed_huc_load_fini(struct intel_huc *huc)
+{
+	/*
+	 * the fence is initialized in init_early, so we need to clean it up
+	 * even if HuC loading is off.
+	 */
+	delayed_huc_load_complete(huc);
+	i915_sw_fence_fini(&huc->delayed_load.fence);
+}
+
+static bool vcs_supported(struct intel_gt *gt)
+{
+	intel_engine_mask_t mask = gt->info.engine_mask;
+
+	/*
+	 * We reach here from i915_driver_early_probe for the primary GT before
+	 * its engine mask is set, so we use the device info engine mask for it;
+	 * this means we're not taking VCS fusing into account, but if the
+	 * primary GT supports VCS engines we expect at least one of them to
+	 * remain unfused so we're fine.
+	 * For other GTs we expect the GT-specific mask to be set before we
+	 * call this function.
+	 */
+	GEM_BUG_ON(!gt_is_root(gt) && !gt->info.engine_mask);
+
+	if (gt_is_root(gt))
+		mask = RUNTIME_INFO(gt->i915)->platform_engine_mask;
+	else
+		mask = gt->info.engine_mask;
+
+	return __ENGINE_INSTANCES_MASK(mask, VCS0, I915_MAX_VCS);
+}
+
+void intel_huc_init_early(struct intel_huc *huc)
+{
+	struct drm_i915_private *i915 = huc_to_gt(huc)->i915;
+	struct intel_gt *gt = huc_to_gt(huc);
+
+	intel_uc_fw_init_early(&huc->fw, INTEL_UC_FW_TYPE_HUC);
+
+	/*
+	 * we always init the fence as already completed, even if HuC is not
+	 * supported. This way we don't have to distinguish between HuC not
+	 * supported/disabled or already loaded, and can focus on if the load
+	 * is currently in progress (fence not complete) or not, which is what
+	 * we care about for stalling userspace submissions.
+	 */
+	delayed_huc_load_init(huc);
+
+	if (!vcs_supported(gt)) {
+		intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_NOT_SUPPORTED);
+		return;
+	}
+
+	if (GRAPHICS_VER(i915) >= 11) {
+		huc->status.reg = GEN11_HUC_KERNEL_LOAD_INFO;
+		huc->status.mask = HUC_LOAD_SUCCESSFUL;
+		huc->status.value = HUC_LOAD_SUCCESSFUL;
+	} else {
+		huc->status.reg = HUC_STATUS2;
+		huc->status.mask = HUC_FW_VERIFIED;
+		huc->status.value = HUC_FW_VERIFIED;
+	}
+}
+
+#define HUC_LOAD_MODE_STRING(x) (x ? "GSC" : "legacy")
+static int check_huc_loading_mode(struct intel_huc *huc)
+{
+	struct intel_gt *gt = huc_to_gt(huc);
+	bool fw_needs_gsc = intel_huc_is_loaded_by_gsc(huc);
+	bool hw_uses_gsc = false;
+
+	/*
+	 * The fuse for HuC load via GSC is only valid on platforms that have
+	 * GuC deprivilege.
+	 */
+	if (HAS_GUC_DEPRIVILEGE(gt->i915))
+		hw_uses_gsc = intel_uncore_read(gt->uncore, GUC_SHIM_CONTROL2) &
+			      GSC_LOADS_HUC;
+
+	if (fw_needs_gsc != hw_uses_gsc) {
+		drm_err(&gt->i915->drm,
+			"mismatch between HuC FW (%s) and HW (%s) load modes\n",
+			HUC_LOAD_MODE_STRING(fw_needs_gsc),
+			HUC_LOAD_MODE_STRING(hw_uses_gsc));
+		return -ENOEXEC;
+	}
+
+	/* make sure we can access the GSC via the mei driver if we need it */
+	if (!(IS_ENABLED(CONFIG_INTEL_MEI_PXP) && IS_ENABLED(CONFIG_INTEL_MEI_GSC)) &&
+	    fw_needs_gsc) {
+		drm_info(&gt->i915->drm,
+			 "Can't load HuC due to missing MEI modules\n");
+		return -EIO;
+	}
+
+	drm_dbg(&gt->i915->drm, "GSC loads huc=%s\n", str_yes_no(fw_needs_gsc));
+
+	return 0;
+}
+
+int intel_huc_init(struct intel_huc *huc)
+{
+	struct drm_i915_private *i915 = huc_to_gt(huc)->i915;
+	int err;
+
+	err = check_huc_loading_mode(huc);
+	if (err)
+		goto out;
+
+	err = intel_uc_fw_init(&huc->fw);
+	if (err)
+		goto out;
+
+	intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_LOADABLE);
+
+	return 0;
+
+out:
+	intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_INIT_FAIL);
+	drm_info(&i915->drm, "HuC init failed with %d\n", err);
+	return err;
+}
+
+void intel_huc_fini(struct intel_huc *huc)
+{
+	/*
+	 * the fence is initialized in init_early, so we need to clean it up
+	 * even if HuC loading is off.
+	 */
+	delayed_huc_load_fini(huc);
+
+	if (intel_uc_fw_is_loadable(&huc->fw))
+		intel_uc_fw_fini(&huc->fw);
+}
+
+void intel_huc_suspend(struct intel_huc *huc)
+{
+	if (!intel_uc_fw_is_loadable(&huc->fw))
+		return;
+
+	/*
+	 * in the unlikely case that we're suspending before the GSC has
+	 * completed its loading sequence, just stop waiting. We'll restart
+	 * on resume.
+	 */
+	delayed_huc_load_complete(huc);
+}
+
+int intel_huc_wait_for_auth_complete(struct intel_huc *huc)
+{
+	struct intel_gt *gt = huc_to_gt(huc);
+	int ret;
+
+	ret = __intel_wait_for_register(gt->uncore,
+					huc->status.reg,
+					huc->status.mask,
+					huc->status.value,
+					2, 50, NULL);
+
+	/* mark the load process as complete even if the wait failed */
+	delayed_huc_load_complete(huc);
+
+	if (ret) {
+		drm_err(&gt->i915->drm, "HuC: Firmware not verified %d\n", ret);
+		intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_LOAD_FAIL);
+		return ret;
+	}
+
+	intel_uc_fw_change_status(&huc->fw, INTEL_UC_FIRMWARE_RUNNING);
+	drm_info(&gt->i915->drm, "HuC authenticated\n");
+	return 0;
+}
+
+/**
+ * intel_huc_auth() - Authenticate HuC uCode
+ * @huc: intel_huc structure
+ *
+ * Called after HuC and GuC firmware loading during intel_uc_init_hw().
+ *
+ * This function invokes the GuC action to authenticate the HuC firmware,
+ * passing the offset of the RSA signature to intel_guc_auth_huc(). It then
+ * waits for up to 50ms for firmware verification ACK.
+ */
+int intel_huc_auth(struct intel_huc *huc)
+{
+	struct intel_gt *gt = huc_to_gt(huc);
+	struct intel_guc *guc = &gt->uc.guc;
+	int ret;
+
+	if (!intel_uc_fw_is_loaded(&huc->fw))
+		return -ENOEXEC;
+
+	/* GSC will do the auth */
+	if (intel_huc_is_loaded_by_gsc(huc))
+		return -ENODEV;
+
+	ret = i915_inject_probe_error(gt->i915, -ENXIO);
+	if (ret)
+		goto fail;
+
+	GEM_BUG_ON(intel_uc_fw_is_running(&huc->fw));
+
+	ret = intel_guc_auth_huc(guc, intel_guc_ggtt_offset(guc, huc->fw.rsa_data));
+	if (ret) {
+		DRM_ERROR("HuC: GuC did not ack Auth request %d\n", ret);
+		goto fail;
+	}
+
+	/* Check authentication status, it should be done by now */
+	ret = intel_huc_wait_for_auth_complete(huc);
+	if (ret)
+		goto fail;
+
+	return 0;
+
+fail:
+	i915_probe_error(gt->i915, "HuC: Authentication failed %d\n", ret);
+	return ret;
+}
+
+bool intel_huc_is_authenticated(struct intel_huc *huc)
+{
+	struct intel_gt *gt = huc_to_gt(huc);
+	intel_wakeref_t wakeref;
+	u32 status = 0;
+
+	with_intel_runtime_pm(gt->uncore->rpm, wakeref)
+		status = intel_uncore_read(gt->uncore, huc->status.reg);
+
+	return (status & huc->status.mask) == huc->status.value;
+}
+
+/**
+ * intel_huc_check_status() - check HuC status
+ * @huc: intel_huc structure
+ *
+ * This function reads status register to verify if HuC
+ * firmware was successfully loaded.
+ *
+ * The return values match what is expected for the I915_PARAM_HUC_STATUS
+ * getparam.
+ */
+int intel_huc_check_status(struct intel_huc *huc)
+{
+	switch (__intel_uc_fw_status(&huc->fw)) {
+	case INTEL_UC_FIRMWARE_NOT_SUPPORTED:
+		return -ENODEV;
+	case INTEL_UC_FIRMWARE_DISABLED:
+		return -EOPNOTSUPP;
+	case INTEL_UC_FIRMWARE_MISSING:
+		return -ENOPKG;
+	case INTEL_UC_FIRMWARE_ERROR:
+		return -ENOEXEC;
+	case INTEL_UC_FIRMWARE_INIT_FAIL:
+		return -ENOMEM;
+	case INTEL_UC_FIRMWARE_LOAD_FAIL:
+		return -EIO;
+	default:
+		break;
+	}
+
+	return intel_huc_is_authenticated(huc);
+}
+
+static bool huc_has_delayed_load(struct intel_huc *huc)
+{
+	return intel_huc_is_loaded_by_gsc(huc) &&
+	       (huc->delayed_load.status != INTEL_HUC_DELAYED_LOAD_ERROR);
+}
+
+void intel_huc_update_auth_status(struct intel_huc *huc)
+{
+	if (!intel_uc_fw_is_loadable(&huc->fw))
+		return;
+
+	if (intel_huc_is_authenticated(huc))
+		intel_uc_fw_change_status(&huc->fw,
+					  INTEL_UC_FIRMWARE_RUNNING);
+	else if (huc_has_delayed_load(huc))
+		huc_delayed_load_start(huc);
+}
+
+/**
+ * intel_huc_load_status - dump information about HuC load status
+ * @huc: the HuC
+ * @p: the &drm_printer
+ *
+ * Pretty printer for HuC load status.
+ */
+void intel_huc_load_status(struct intel_huc *huc, struct drm_printer *p)
+{
+	struct intel_gt *gt = huc_to_gt(huc);
+	intel_wakeref_t wakeref;
+
+	if (!intel_huc_is_supported(huc)) {
+		drm_printf(p, "HuC not supported\n");
+		return;
+	}
+
+	if (!intel_huc_is_wanted(huc)) {
+		drm_printf(p, "HuC disabled\n");
+		return;
+	}
+
+	intel_uc_fw_dump(&huc->fw, p);
+
+	with_intel_runtime_pm(gt->uncore->rpm, wakeref)
+		drm_printf(p, "HuC status: 0x%08x\n",
+			   intel_uncore_read(gt->uncore, huc->status.reg));
+}