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, 368 insertions, 0 deletions

diff --git a/drivers/crypto/qat/qat_common/adf_pfvf_vf_proto.c b/drivers/crypto/qat/qat_common/adf_pfvf_vf_proto.c
new file mode 100644
index 000000000..1015155b6
--- /dev/null
+++ b/drivers/crypto/qat/qat_common/adf_pfvf_vf_proto.c
@@ -0,0 +1,368 @@
+// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
+/* Copyright(c) 2015 - 2021 Intel Corporation */
+#include <linux/bitfield.h>
+#include <linux/completion.h>
+#include <linux/minmax.h>
+#include <linux/types.h>
+#include "adf_accel_devices.h"
+#include "adf_common_drv.h"
+#include "adf_pfvf_msg.h"
+#include "adf_pfvf_utils.h"
+#include "adf_pfvf_vf_msg.h"
+#include "adf_pfvf_vf_proto.h"
+
+#define ADF_PFVF_MSG_COLLISION_DETECT_DELAY	10
+#define ADF_PFVF_MSG_ACK_DELAY			2
+#define ADF_PFVF_MSG_ACK_MAX_RETRY		100
+
+/* How often to retry if there is no response */
+#define ADF_PFVF_MSG_RESP_RETRIES	5
+#define ADF_PFVF_MSG_RESP_TIMEOUT	(ADF_PFVF_MSG_ACK_DELAY * \
+					 ADF_PFVF_MSG_ACK_MAX_RETRY + \
+					 ADF_PFVF_MSG_COLLISION_DETECT_DELAY)
+
+/**
+ * adf_send_vf2pf_msg() - send VF to PF message
+ * @accel_dev:	Pointer to acceleration device
+ * @msg:	Message to send
+ *
+ * This function allows the VF to send a message to the PF.
+ *
+ * Return: 0 on success, error code otherwise.
+ */
+int adf_send_vf2pf_msg(struct adf_accel_dev *accel_dev, struct pfvf_message msg)
+{
+	struct adf_pfvf_ops *pfvf_ops = GET_PFVF_OPS(accel_dev);
+	u32 pfvf_offset = pfvf_ops->get_vf2pf_offset(0);
+
+	return pfvf_ops->send_msg(accel_dev, msg, pfvf_offset,
+				  &accel_dev->vf.vf2pf_lock);
+}
+
+/**
+ * adf_recv_pf2vf_msg() - receive a PF to VF message
+ * @accel_dev:	Pointer to acceleration device
+ *
+ * This function allows the VF to receive a message from the PF.
+ *
+ * Return: a valid message on success, zero otherwise.
+ */
+static struct pfvf_message adf_recv_pf2vf_msg(struct adf_accel_dev *accel_dev)
+{
+	struct adf_pfvf_ops *pfvf_ops = GET_PFVF_OPS(accel_dev);
+	u32 pfvf_offset = pfvf_ops->get_pf2vf_offset(0);
+
+	return pfvf_ops->recv_msg(accel_dev, pfvf_offset, accel_dev->vf.pf_compat_ver);
+}
+
+/**
+ * adf_send_vf2pf_req() - send VF2PF request message
+ * @accel_dev:	Pointer to acceleration device.
+ * @msg:	Request message to send
+ * @resp:	Returned PF response
+ *
+ * This function sends a message that requires a response from the VF to the PF
+ * and waits for a reply.
+ *
+ * Return: 0 on success, error code otherwise.
+ */
+int adf_send_vf2pf_req(struct adf_accel_dev *accel_dev, struct pfvf_message msg,
+		       struct pfvf_message *resp)
+{
+	unsigned long timeout = msecs_to_jiffies(ADF_PFVF_MSG_RESP_TIMEOUT);
+	unsigned int retries = ADF_PFVF_MSG_RESP_RETRIES;
+	int ret;
+
+	reinit_completion(&accel_dev->vf.msg_received);
+
+	/* Send request from VF to PF */
+	do {
+		ret = adf_send_vf2pf_msg(accel_dev, msg);
+		if (ret) {
+			dev_err(&GET_DEV(accel_dev),
+				"Failed to send request msg to PF\n");
+			return ret;
+		}
+
+		/* Wait for response, if it times out retry */
+		ret = wait_for_completion_timeout(&accel_dev->vf.msg_received,
+						  timeout);
+		if (ret) {
+			if (likely(resp))
+				*resp = accel_dev->vf.response;
+
+			/* Once copied, set to an invalid value */
+			accel_dev->vf.response.type = 0;
+
+			return 0;
+		}
+
+		dev_err(&GET_DEV(accel_dev), "PFVF response message timeout\n");
+	} while (--retries);
+
+	return -EIO;
+}
+
+static int adf_vf2pf_blkmsg_data_req(struct adf_accel_dev *accel_dev, bool crc,
+				     u8 *type, u8 *data)
+{
+	struct pfvf_message req = { 0 };
+	struct pfvf_message resp = { 0 };
+	u8 blk_type;
+	u8 blk_byte;
+	u8 msg_type;
+	u8 max_data;
+	int err;
+
+	/* Convert the block type to {small, medium, large} size category */
+	if (*type <= ADF_VF2PF_SMALL_BLOCK_TYPE_MAX) {
+		msg_type = ADF_VF2PF_MSGTYPE_SMALL_BLOCK_REQ;
+		blk_type = FIELD_PREP(ADF_VF2PF_SMALL_BLOCK_TYPE_MASK, *type);
+		blk_byte = FIELD_PREP(ADF_VF2PF_SMALL_BLOCK_BYTE_MASK, *data);
+		max_data = ADF_VF2PF_SMALL_BLOCK_BYTE_MAX;
+	} else if (*type <= ADF_VF2PF_MEDIUM_BLOCK_TYPE_MAX) {
+		msg_type = ADF_VF2PF_MSGTYPE_MEDIUM_BLOCK_REQ;
+		blk_type = FIELD_PREP(ADF_VF2PF_MEDIUM_BLOCK_TYPE_MASK,
+				      *type - ADF_VF2PF_SMALL_BLOCK_TYPE_MAX);
+		blk_byte = FIELD_PREP(ADF_VF2PF_MEDIUM_BLOCK_BYTE_MASK, *data);
+		max_data = ADF_VF2PF_MEDIUM_BLOCK_BYTE_MAX;
+	} else if (*type <= ADF_VF2PF_LARGE_BLOCK_TYPE_MAX) {
+		msg_type = ADF_VF2PF_MSGTYPE_LARGE_BLOCK_REQ;
+		blk_type = FIELD_PREP(ADF_VF2PF_LARGE_BLOCK_TYPE_MASK,
+				      *type - ADF_VF2PF_MEDIUM_BLOCK_TYPE_MAX);
+		blk_byte = FIELD_PREP(ADF_VF2PF_LARGE_BLOCK_BYTE_MASK, *data);
+		max_data = ADF_VF2PF_LARGE_BLOCK_BYTE_MAX;
+	} else {
+		dev_err(&GET_DEV(accel_dev), "Invalid message type %u\n", *type);
+		return -EINVAL;
+	}
+
+	/* Sanity check */
+	if (*data > max_data) {
+		dev_err(&GET_DEV(accel_dev),
+			"Invalid byte %s %u for message type %u\n",
+			crc ? "count" : "index", *data, *type);
+		return -EINVAL;
+	}
+
+	/* Build the block message */
+	req.type = msg_type;
+	req.data = blk_type | blk_byte | FIELD_PREP(ADF_VF2PF_BLOCK_CRC_REQ_MASK, crc);
+
+	err = adf_send_vf2pf_req(accel_dev, req, &resp);
+	if (err)
+		return err;
+
+	*type = FIELD_GET(ADF_PF2VF_BLKMSG_RESP_TYPE_MASK, resp.data);
+	*data = FIELD_GET(ADF_PF2VF_BLKMSG_RESP_DATA_MASK, resp.data);
+
+	return 0;
+}
+
+static int adf_vf2pf_blkmsg_get_byte(struct adf_accel_dev *accel_dev, u8 type,
+				     u8 index, u8 *data)
+{
+	int ret;
+
+	ret = adf_vf2pf_blkmsg_data_req(accel_dev, false, &type, &index);
+	if (ret < 0)
+		return ret;
+
+	if (unlikely(type != ADF_PF2VF_BLKMSG_RESP_TYPE_DATA)) {
+		dev_err(&GET_DEV(accel_dev),
+			"Unexpected BLKMSG response type %u, byte 0x%x\n",
+			type, index);
+		return -EFAULT;
+	}
+
+	*data = index;
+	return 0;
+}
+
+static int adf_vf2pf_blkmsg_get_crc(struct adf_accel_dev *accel_dev, u8 type,
+				    u8 bytes, u8 *crc)
+{
+	int ret;
+
+	/* The count of bytes refers to a length, however shift it to a 0-based
+	 * count to avoid overflows. Thus, a request for 0 bytes is technically
+	 * valid.
+	 */
+	--bytes;
+
+	ret = adf_vf2pf_blkmsg_data_req(accel_dev, true, &type, &bytes);
+	if (ret < 0)
+		return ret;
+
+	if (unlikely(type != ADF_PF2VF_BLKMSG_RESP_TYPE_CRC)) {
+		dev_err(&GET_DEV(accel_dev),
+			"Unexpected CRC BLKMSG response type %u, crc 0x%x\n",
+			type, bytes);
+		return  -EFAULT;
+	}
+
+	*crc = bytes;
+	return 0;
+}
+
+/**
+ * adf_send_vf2pf_blkmsg_req() - retrieve block message
+ * @accel_dev:	Pointer to acceleration VF device.
+ * @type:	The block message type, see adf_pfvf_msg.h for allowed values
+ * @buffer:	input buffer where to place the received data
+ * @buffer_len:	buffer length as input, the amount of written bytes on output
+ *
+ * Request a message of type 'type' over the block message transport.
+ * This function will send the required amount block message requests and
+ * return the overall content back to the caller through the provided buffer.
+ * The buffer should be large enough to contain the requested message type,
+ * otherwise the response will be truncated.
+ *
+ * Return: 0 on success, error code otherwise.
+ */
+int adf_send_vf2pf_blkmsg_req(struct adf_accel_dev *accel_dev, u8 type,
+			      u8 *buffer, unsigned int *buffer_len)
+{
+	unsigned int index;
+	unsigned int msg_len;
+	int ret;
+	u8 remote_crc;
+	u8 local_crc;
+
+	if (unlikely(type > ADF_VF2PF_LARGE_BLOCK_TYPE_MAX)) {
+		dev_err(&GET_DEV(accel_dev), "Invalid block message type %d\n",
+			type);
+		return -EINVAL;
+	}
+
+	if (unlikely(*buffer_len < ADF_PFVF_BLKMSG_HEADER_SIZE)) {
+		dev_err(&GET_DEV(accel_dev),
+			"Buffer size too small for a block message\n");
+		return -EINVAL;
+	}
+
+	ret = adf_vf2pf_blkmsg_get_byte(accel_dev, type,
+					ADF_PFVF_BLKMSG_VER_BYTE,
+					&buffer[ADF_PFVF_BLKMSG_VER_BYTE]);
+	if (unlikely(ret))
+		return ret;
+
+	if (unlikely(!buffer[ADF_PFVF_BLKMSG_VER_BYTE])) {
+		dev_err(&GET_DEV(accel_dev),
+			"Invalid version 0 received for block request %u", type);
+		return -EFAULT;
+	}
+
+	ret = adf_vf2pf_blkmsg_get_byte(accel_dev, type,
+					ADF_PFVF_BLKMSG_LEN_BYTE,
+					&buffer[ADF_PFVF_BLKMSG_LEN_BYTE]);
+	if (unlikely(ret))
+		return ret;
+
+	if (unlikely(!buffer[ADF_PFVF_BLKMSG_LEN_BYTE])) {
+		dev_err(&GET_DEV(accel_dev),
+			"Invalid size 0 received for block request %u", type);
+		return -EFAULT;
+	}
+
+	/* We need to pick the minimum since there is no way to request a
+	 * specific version. As a consequence any scenario is possible:
+	 * - PF has a newer (longer) version which doesn't fit in the buffer
+	 * - VF expects a newer (longer) version, so we must not ask for
+	 *   bytes in excess
+	 * - PF and VF share the same version, no problem
+	 */
+	msg_len = ADF_PFVF_BLKMSG_HEADER_SIZE + buffer[ADF_PFVF_BLKMSG_LEN_BYTE];
+	msg_len = min(*buffer_len, msg_len);
+
+	/* Get the payload */
+	for (index = ADF_PFVF_BLKMSG_HEADER_SIZE; index < msg_len; index++) {
+		ret = adf_vf2pf_blkmsg_get_byte(accel_dev, type, index,
+						&buffer[index]);
+		if (unlikely(ret))
+			return ret;
+	}
+
+	ret = adf_vf2pf_blkmsg_get_crc(accel_dev, type, msg_len, &remote_crc);
+	if (unlikely(ret))
+		return ret;
+
+	local_crc = adf_pfvf_calc_blkmsg_crc(buffer, msg_len);
+	if (unlikely(local_crc != remote_crc)) {
+		dev_err(&GET_DEV(accel_dev),
+			"CRC error on msg type %d. Local %02X, remote %02X\n",
+			type, local_crc, remote_crc);
+		return -EIO;
+	}
+
+	*buffer_len = msg_len;
+	return 0;
+}
+
+static bool adf_handle_pf2vf_msg(struct adf_accel_dev *accel_dev,
+				 struct pfvf_message msg)
+{
+	switch (msg.type) {
+	case ADF_PF2VF_MSGTYPE_RESTARTING:
+		dev_dbg(&GET_DEV(accel_dev), "Restarting message received from PF\n");
+
+		adf_pf2vf_handle_pf_restarting(accel_dev);
+		return false;
+	case ADF_PF2VF_MSGTYPE_VERSION_RESP:
+	case ADF_PF2VF_MSGTYPE_BLKMSG_RESP:
+	case ADF_PF2VF_MSGTYPE_RP_RESET_RESP:
+		dev_dbg(&GET_DEV(accel_dev),
+			"Response Message received from PF (type 0x%.4x, data 0x%.4x)\n",
+			msg.type, msg.data);
+		accel_dev->vf.response = msg;
+		complete(&accel_dev->vf.msg_received);
+		return true;
+	default:
+		dev_err(&GET_DEV(accel_dev),
+			"Unknown message from PF (type 0x%.4x, data: 0x%.4x)\n",
+			msg.type, msg.data);
+	}
+
+	return false;
+}
+
+bool adf_recv_and_handle_pf2vf_msg(struct adf_accel_dev *accel_dev)
+{
+	struct pfvf_message msg;
+
+	msg = adf_recv_pf2vf_msg(accel_dev);
+	if (msg.type)  /* Invalid or no message */
+		return adf_handle_pf2vf_msg(accel_dev, msg);
+
+	/* No replies for PF->VF messages at present */
+
+	return true;
+}
+
+/**
+ * adf_enable_vf2pf_comms() - Function enables communication from vf to pf
+ *
+ * @accel_dev:	Pointer to acceleration device virtual function.
+ *
+ * Return: 0 on success, error code otherwise.
+ */
+int adf_enable_vf2pf_comms(struct adf_accel_dev *accel_dev)
+{
+	int ret;
+
+	adf_pfvf_crc_init();
+	adf_enable_pf2vf_interrupts(accel_dev);
+
+	ret = adf_vf2pf_request_version(accel_dev);
+	if (ret)
+		return ret;
+
+	ret = adf_vf2pf_get_capabilities(accel_dev);
+	if (ret)
+		return ret;
+
+	ret = adf_vf2pf_get_ring_to_svc(accel_dev);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(adf_enable_vf2pf_comms);