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, 348 insertions, 0 deletions

diff --git a/drivers/crypto/qat/qat_common/adf_pfvf_pf_proto.c b/drivers/crypto/qat/qat_common/adf_pfvf_pf_proto.c
new file mode 100644
index 000000000..388e58bcb
--- /dev/null
+++ b/drivers/crypto/qat/qat_common/adf_pfvf_pf_proto.c
@@ -0,0 +1,348 @@
+// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
+/* Copyright(c) 2015 - 2021 Intel Corporation */
+#include <linux/bitfield.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include "adf_accel_devices.h"
+#include "adf_common_drv.h"
+#include "adf_pfvf_msg.h"
+#include "adf_pfvf_pf_msg.h"
+#include "adf_pfvf_pf_proto.h"
+#include "adf_pfvf_utils.h"
+
+typedef u8 (*pf2vf_blkmsg_data_getter_fn)(u8 const *blkmsg, u8 byte);
+
+static const adf_pf2vf_blkmsg_provider pf2vf_blkmsg_providers[] = {
+	NULL,				  /* no message type defined for value 0 */
+	NULL,				  /* no message type defined for value 1 */
+	adf_pf_capabilities_msg_provider, /* ADF_VF2PF_BLKMSG_REQ_CAP_SUMMARY */
+	adf_pf_ring_to_svc_msg_provider,  /* ADF_VF2PF_BLKMSG_REQ_RING_SVC_MAP */
+};
+
+/**
+ * adf_send_pf2vf_msg() - send PF to VF message
+ * @accel_dev:	Pointer to acceleration device
+ * @vf_nr:	VF number to which the message will be sent
+ * @msg:	Message to send
+ *
+ * This function allows the PF to send a message to a specific VF.
+ *
+ * Return: 0 on success, error code otherwise.
+ */
+int adf_send_pf2vf_msg(struct adf_accel_dev *accel_dev, u8 vf_nr, struct pfvf_message msg)
+{
+	struct adf_pfvf_ops *pfvf_ops = GET_PFVF_OPS(accel_dev);
+	u32 pfvf_offset = pfvf_ops->get_pf2vf_offset(vf_nr);
+
+	return pfvf_ops->send_msg(accel_dev, msg, pfvf_offset,
+				  &accel_dev->pf.vf_info[vf_nr].pf2vf_lock);
+}
+
+/**
+ * adf_recv_vf2pf_msg() - receive a VF to PF message
+ * @accel_dev:	Pointer to acceleration device
+ * @vf_nr:	Number of the VF from where the message will be received
+ *
+ * This function allows the PF to receive a message from a specific VF.
+ *
+ * Return: a valid message on success, zero otherwise.
+ */
+static struct pfvf_message adf_recv_vf2pf_msg(struct adf_accel_dev *accel_dev, u8 vf_nr)
+{
+	struct adf_accel_vf_info *vf_info = &accel_dev->pf.vf_info[vf_nr];
+	struct adf_pfvf_ops *pfvf_ops = GET_PFVF_OPS(accel_dev);
+	u32 pfvf_offset = pfvf_ops->get_vf2pf_offset(vf_nr);
+
+	return pfvf_ops->recv_msg(accel_dev, pfvf_offset, vf_info->vf_compat_ver);
+}
+
+static adf_pf2vf_blkmsg_provider get_blkmsg_response_provider(u8 type)
+{
+	if (type >= ARRAY_SIZE(pf2vf_blkmsg_providers))
+		return NULL;
+
+	return pf2vf_blkmsg_providers[type];
+}
+
+/* Byte pf2vf_blkmsg_data_getter_fn callback */
+static u8 adf_pf2vf_blkmsg_get_byte(u8 const *blkmsg, u8 index)
+{
+	return blkmsg[index];
+}
+
+/* CRC pf2vf_blkmsg_data_getter_fn callback */
+static u8 adf_pf2vf_blkmsg_get_crc(u8 const *blkmsg, u8 count)
+{
+	/* count is 0-based, turn it into a length */
+	return adf_pfvf_calc_blkmsg_crc(blkmsg, count + 1);
+}
+
+static int adf_pf2vf_blkmsg_get_data(struct adf_accel_vf_info *vf_info,
+				     u8 type, u8 byte, u8 max_size, u8 *data,
+				     pf2vf_blkmsg_data_getter_fn data_getter)
+{
+	u8 blkmsg[ADF_PFVF_BLKMSG_MSG_MAX_SIZE] = { 0 };
+	struct adf_accel_dev *accel_dev = vf_info->accel_dev;
+	adf_pf2vf_blkmsg_provider provider;
+	u8 msg_size;
+
+	provider = get_blkmsg_response_provider(type);
+
+	if (unlikely(!provider)) {
+		pr_err("QAT: No registered provider for message %d\n", type);
+		*data = ADF_PF2VF_INVALID_BLOCK_TYPE;
+		return -EINVAL;
+	}
+
+	if (unlikely((*provider)(accel_dev, blkmsg, vf_info->vf_compat_ver))) {
+		pr_err("QAT: unknown error from provider for message %d\n", type);
+		*data = ADF_PF2VF_UNSPECIFIED_ERROR;
+		return -EINVAL;
+	}
+
+	msg_size = ADF_PFVF_BLKMSG_HEADER_SIZE + blkmsg[ADF_PFVF_BLKMSG_LEN_BYTE];
+
+	if (unlikely(msg_size >= max_size)) {
+		pr_err("QAT: Invalid size %d provided for message type %d\n",
+		       msg_size, type);
+		*data = ADF_PF2VF_PAYLOAD_TRUNCATED;
+		return -EINVAL;
+	}
+
+	if (unlikely(byte >= msg_size)) {
+		pr_err("QAT: Out-of-bound byte number %d (msg size %d)\n",
+		       byte, msg_size);
+		*data = ADF_PF2VF_INVALID_BYTE_NUM_REQ;
+		return -EINVAL;
+	}
+
+	*data = data_getter(blkmsg, byte);
+	return 0;
+}
+
+static struct pfvf_message handle_blkmsg_req(struct adf_accel_vf_info *vf_info,
+					     struct pfvf_message req)
+{
+	u8 resp_type = ADF_PF2VF_BLKMSG_RESP_TYPE_ERROR;
+	struct pfvf_message resp = { 0 };
+	u8 resp_data = 0;
+	u8 blk_type;
+	u8 blk_byte;
+	u8 byte_max;
+
+	switch (req.type) {
+	case ADF_VF2PF_MSGTYPE_LARGE_BLOCK_REQ:
+		blk_type = FIELD_GET(ADF_VF2PF_LARGE_BLOCK_TYPE_MASK, req.data)
+			   + ADF_VF2PF_MEDIUM_BLOCK_TYPE_MAX + 1;
+		blk_byte = FIELD_GET(ADF_VF2PF_LARGE_BLOCK_BYTE_MASK, req.data);
+		byte_max = ADF_VF2PF_LARGE_BLOCK_BYTE_MAX;
+		break;
+	case ADF_VF2PF_MSGTYPE_MEDIUM_BLOCK_REQ:
+		blk_type = FIELD_GET(ADF_VF2PF_MEDIUM_BLOCK_TYPE_MASK, req.data)
+			   + ADF_VF2PF_SMALL_BLOCK_TYPE_MAX + 1;
+		blk_byte = FIELD_GET(ADF_VF2PF_MEDIUM_BLOCK_BYTE_MASK, req.data);
+		byte_max = ADF_VF2PF_MEDIUM_BLOCK_BYTE_MAX;
+		break;
+	case ADF_VF2PF_MSGTYPE_SMALL_BLOCK_REQ:
+		blk_type = FIELD_GET(ADF_VF2PF_SMALL_BLOCK_TYPE_MASK, req.data);
+		blk_byte = FIELD_GET(ADF_VF2PF_SMALL_BLOCK_BYTE_MASK, req.data);
+		byte_max = ADF_VF2PF_SMALL_BLOCK_BYTE_MAX;
+		break;
+	}
+
+	/* Is this a request for CRC or data? */
+	if (FIELD_GET(ADF_VF2PF_BLOCK_CRC_REQ_MASK, req.data)) {
+		dev_dbg(&GET_DEV(vf_info->accel_dev),
+			"BlockMsg of type %d for CRC over %d bytes received from VF%d\n",
+			blk_type, blk_byte + 1, vf_info->vf_nr);
+
+		if (!adf_pf2vf_blkmsg_get_data(vf_info, blk_type, blk_byte,
+					       byte_max, &resp_data,
+					       adf_pf2vf_blkmsg_get_crc))
+			resp_type = ADF_PF2VF_BLKMSG_RESP_TYPE_CRC;
+	} else {
+		dev_dbg(&GET_DEV(vf_info->accel_dev),
+			"BlockMsg of type %d for data byte %d received from VF%d\n",
+			blk_type, blk_byte, vf_info->vf_nr);
+
+		if (!adf_pf2vf_blkmsg_get_data(vf_info, blk_type, blk_byte,
+					       byte_max, &resp_data,
+					       adf_pf2vf_blkmsg_get_byte))
+			resp_type = ADF_PF2VF_BLKMSG_RESP_TYPE_DATA;
+	}
+
+	resp.type = ADF_PF2VF_MSGTYPE_BLKMSG_RESP;
+	resp.data = FIELD_PREP(ADF_PF2VF_BLKMSG_RESP_TYPE_MASK, resp_type) |
+		    FIELD_PREP(ADF_PF2VF_BLKMSG_RESP_DATA_MASK, resp_data);
+
+	return resp;
+}
+
+static struct pfvf_message handle_rp_reset_req(struct adf_accel_dev *accel_dev, u8 vf_nr,
+					       struct pfvf_message req)
+{
+	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
+	struct pfvf_message resp = {
+		.type = ADF_PF2VF_MSGTYPE_RP_RESET_RESP,
+		.data = RPRESET_SUCCESS
+	};
+	u32 bank_number;
+	u32 rsvd_field;
+
+	bank_number = FIELD_GET(ADF_VF2PF_RNG_RESET_RP_MASK, req.data);
+	rsvd_field = FIELD_GET(ADF_VF2PF_RNG_RESET_RSVD_MASK, req.data);
+
+	dev_dbg(&GET_DEV(accel_dev),
+		"Ring Pair Reset Message received from VF%d for bank 0x%x\n",
+		vf_nr, bank_number);
+
+	if (!hw_data->ring_pair_reset || rsvd_field) {
+		dev_dbg(&GET_DEV(accel_dev),
+			"Ring Pair Reset for VF%d is not supported\n", vf_nr);
+		resp.data = RPRESET_NOT_SUPPORTED;
+		goto out;
+	}
+
+	if (bank_number >= hw_data->num_banks_per_vf) {
+		dev_err(&GET_DEV(accel_dev),
+			"Invalid bank number (0x%x) from VF%d for Ring Reset\n",
+			bank_number, vf_nr);
+		resp.data = RPRESET_INVAL_BANK;
+		goto out;
+	}
+
+	/* Convert the VF provided value to PF bank number */
+	bank_number = vf_nr * hw_data->num_banks_per_vf + bank_number;
+	if (hw_data->ring_pair_reset(accel_dev, bank_number)) {
+		dev_dbg(&GET_DEV(accel_dev),
+			"Ring pair reset for VF%d failure\n", vf_nr);
+		resp.data = RPRESET_TIMEOUT;
+		goto out;
+	}
+
+	dev_dbg(&GET_DEV(accel_dev),
+		"Ring pair reset for VF%d successfully\n", vf_nr);
+
+out:
+	return resp;
+}
+
+static int adf_handle_vf2pf_msg(struct adf_accel_dev *accel_dev, u8 vf_nr,
+				struct pfvf_message msg, struct pfvf_message *resp)
+{
+	struct adf_accel_vf_info *vf_info = &accel_dev->pf.vf_info[vf_nr];
+
+	switch (msg.type) {
+	case ADF_VF2PF_MSGTYPE_COMPAT_VER_REQ:
+		{
+		u8 vf_compat_ver = msg.data;
+		u8 compat;
+
+		dev_dbg(&GET_DEV(accel_dev),
+			"VersionRequest received from VF%d (vers %d) to PF (vers %d)\n",
+			vf_nr, vf_compat_ver, ADF_PFVF_COMPAT_THIS_VERSION);
+
+		if (vf_compat_ver == 0)
+			compat = ADF_PF2VF_VF_INCOMPATIBLE;
+		else if (vf_compat_ver <= ADF_PFVF_COMPAT_THIS_VERSION)
+			compat = ADF_PF2VF_VF_COMPATIBLE;
+		else
+			compat = ADF_PF2VF_VF_COMPAT_UNKNOWN;
+
+		vf_info->vf_compat_ver = vf_compat_ver;
+
+		resp->type = ADF_PF2VF_MSGTYPE_VERSION_RESP;
+		resp->data = FIELD_PREP(ADF_PF2VF_VERSION_RESP_VERS_MASK,
+					ADF_PFVF_COMPAT_THIS_VERSION) |
+			     FIELD_PREP(ADF_PF2VF_VERSION_RESP_RESULT_MASK, compat);
+		}
+		break;
+	case ADF_VF2PF_MSGTYPE_VERSION_REQ:
+		{
+		u8 compat;
+
+		dev_dbg(&GET_DEV(accel_dev),
+			"Legacy VersionRequest received from VF%d to PF (vers 1.1)\n",
+			vf_nr);
+
+		/* legacy driver, VF compat_ver is 0 */
+		vf_info->vf_compat_ver = 0;
+
+		/* PF always newer than legacy VF */
+		compat = ADF_PF2VF_VF_COMPATIBLE;
+
+		/* Set legacy major and minor version to the latest, 1.1 */
+		resp->type = ADF_PF2VF_MSGTYPE_VERSION_RESP;
+		resp->data = FIELD_PREP(ADF_PF2VF_VERSION_RESP_VERS_MASK, 0x11) |
+			     FIELD_PREP(ADF_PF2VF_VERSION_RESP_RESULT_MASK, compat);
+		}
+		break;
+	case ADF_VF2PF_MSGTYPE_INIT:
+		{
+		dev_dbg(&GET_DEV(accel_dev),
+			"Init message received from VF%d\n", vf_nr);
+		vf_info->init = true;
+		}
+		break;
+	case ADF_VF2PF_MSGTYPE_SHUTDOWN:
+		{
+		dev_dbg(&GET_DEV(accel_dev),
+			"Shutdown message received from VF%d\n", vf_nr);
+		vf_info->init = false;
+		}
+		break;
+	case ADF_VF2PF_MSGTYPE_LARGE_BLOCK_REQ:
+	case ADF_VF2PF_MSGTYPE_MEDIUM_BLOCK_REQ:
+	case ADF_VF2PF_MSGTYPE_SMALL_BLOCK_REQ:
+		*resp = handle_blkmsg_req(vf_info, msg);
+		break;
+	case ADF_VF2PF_MSGTYPE_RP_RESET:
+		*resp = handle_rp_reset_req(accel_dev, vf_nr, msg);
+		break;
+	default:
+		dev_dbg(&GET_DEV(accel_dev),
+			"Unknown message from VF%d (type 0x%.4x, data: 0x%.4x)\n",
+			vf_nr, msg.type, msg.data);
+		return -ENOMSG;
+	}
+
+	return 0;
+}
+
+bool adf_recv_and_handle_vf2pf_msg(struct adf_accel_dev *accel_dev, u32 vf_nr)
+{
+	struct pfvf_message req;
+	struct pfvf_message resp = {0};
+
+	req = adf_recv_vf2pf_msg(accel_dev, vf_nr);
+	if (!req.type)  /* Legacy or no message */
+		return true;
+
+	if (adf_handle_vf2pf_msg(accel_dev, vf_nr, req, &resp))
+		return false;
+
+	if (resp.type && adf_send_pf2vf_msg(accel_dev, vf_nr, resp))
+		dev_err(&GET_DEV(accel_dev),
+			"Failed to send response to VF%d\n", vf_nr);
+
+	return true;
+}
+
+/**
+ * adf_enable_pf2vf_comms() - Function enables communication from pf to vf
+ *
+ * @accel_dev: Pointer to acceleration device virtual function.
+ *
+ * This function carries out the necessary steps to setup and start the PFVF
+ * communication channel, if any.
+ *
+ * Return: 0 on success, error code otherwise.
+ */
+int adf_enable_pf2vf_comms(struct adf_accel_dev *accel_dev)
+{
+	adf_pfvf_crc_init();
+	spin_lock_init(&accel_dev->pf.vf2pf_ints_lock);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(adf_enable_pf2vf_comms);