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, 681 insertions, 0 deletions

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c
new file mode 100644
index 000000000..4aa1f433e
--- /dev/null
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_mgmt.c
@@ -0,0 +1,681 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Huawei HiNIC PCI Express Linux driver
+ * Copyright(c) 2017 Huawei Technologies Co., Ltd
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/device.h>
+#include <linux/semaphore.h>
+#include <linux/completion.h>
+#include <linux/slab.h>
+#include <net/devlink.h>
+#include <asm/barrier.h>
+
+#include "hinic_devlink.h"
+#include "hinic_hw_if.h"
+#include "hinic_hw_eqs.h"
+#include "hinic_hw_api_cmd.h"
+#include "hinic_hw_mgmt.h"
+#include "hinic_hw_dev.h"
+
+#define SYNC_MSG_ID_MASK                0x1FF
+
+#define SYNC_MSG_ID(pf_to_mgmt)         ((pf_to_mgmt)->sync_msg_id)
+
+#define SYNC_MSG_ID_INC(pf_to_mgmt)     (SYNC_MSG_ID(pf_to_mgmt) = \
+					((SYNC_MSG_ID(pf_to_mgmt) + 1) & \
+					 SYNC_MSG_ID_MASK))
+
+#define MSG_SZ_IS_VALID(in_size)        ((in_size) <= MAX_MSG_LEN)
+
+#define MGMT_MSG_LEN_MIN                20
+#define MGMT_MSG_LEN_STEP               16
+#define MGMT_MSG_RSVD_FOR_DEV           8
+
+#define SEGMENT_LEN                     48
+
+#define MAX_PF_MGMT_BUF_SIZE            2048
+
+/* Data should be SEG LEN size aligned */
+#define MAX_MSG_LEN                     2016
+
+#define MSG_NOT_RESP                    0xFFFF
+
+#define MGMT_MSG_TIMEOUT                5000
+
+#define SET_FUNC_PORT_MBOX_TIMEOUT	30000
+
+#define SET_FUNC_PORT_MGMT_TIMEOUT	25000
+
+#define UPDATE_FW_MGMT_TIMEOUT		20000
+
+#define mgmt_to_pfhwdev(pf_mgmt)        \
+		container_of(pf_mgmt, struct hinic_pfhwdev, pf_to_mgmt)
+
+enum msg_segment_type {
+	NOT_LAST_SEGMENT = 0,
+	LAST_SEGMENT     = 1,
+};
+
+enum mgmt_direction_type {
+	MGMT_DIRECT_SEND = 0,
+	MGMT_RESP        = 1,
+};
+
+enum msg_ack_type {
+	MSG_ACK         = 0,
+	MSG_NO_ACK      = 1,
+};
+
+/**
+ * hinic_register_mgmt_msg_cb - register msg handler for a msg from a module
+ * @pf_to_mgmt: PF to MGMT channel
+ * @mod: module in the chip that this handler will handle its messages
+ * @handle: private data for the callback
+ * @callback: the handler that will handle messages
+ **/
+void hinic_register_mgmt_msg_cb(struct hinic_pf_to_mgmt *pf_to_mgmt,
+				enum hinic_mod_type mod,
+				void *handle,
+				void (*callback)(void *handle,
+						 u8 cmd, void *buf_in,
+						 u16 in_size, void *buf_out,
+						 u16 *out_size))
+{
+	struct hinic_mgmt_cb *mgmt_cb = &pf_to_mgmt->mgmt_cb[mod];
+
+	mgmt_cb->cb = callback;
+	mgmt_cb->handle = handle;
+	mgmt_cb->state = HINIC_MGMT_CB_ENABLED;
+}
+
+/**
+ * hinic_unregister_mgmt_msg_cb - unregister msg handler for a msg from a module
+ * @pf_to_mgmt: PF to MGMT channel
+ * @mod: module in the chip that this handler handles its messages
+ **/
+void hinic_unregister_mgmt_msg_cb(struct hinic_pf_to_mgmt *pf_to_mgmt,
+				  enum hinic_mod_type mod)
+{
+	struct hinic_mgmt_cb *mgmt_cb = &pf_to_mgmt->mgmt_cb[mod];
+
+	mgmt_cb->state &= ~HINIC_MGMT_CB_ENABLED;
+
+	while (mgmt_cb->state & HINIC_MGMT_CB_RUNNING)
+		schedule();
+
+	mgmt_cb->cb = NULL;
+}
+
+/**
+ * prepare_header - prepare the header of the message
+ * @pf_to_mgmt: PF to MGMT channel
+ * @msg_len: the length of the message
+ * @mod: module in the chip that will get the message
+ * @ack_type: ask for response
+ * @direction: the direction of the message
+ * @cmd: command of the message
+ * @msg_id: message id
+ *
+ * Return the prepared header value
+ **/
+static u64 prepare_header(struct hinic_pf_to_mgmt *pf_to_mgmt,
+			  u16 msg_len, enum hinic_mod_type mod,
+			  enum msg_ack_type ack_type,
+			  enum mgmt_direction_type direction,
+			  u16 cmd, u16 msg_id)
+{
+	struct hinic_hwif *hwif = pf_to_mgmt->hwif;
+
+	return HINIC_MSG_HEADER_SET(msg_len, MSG_LEN)           |
+	       HINIC_MSG_HEADER_SET(mod, MODULE)                |
+	       HINIC_MSG_HEADER_SET(SEGMENT_LEN, SEG_LEN)       |
+	       HINIC_MSG_HEADER_SET(ack_type, NO_ACK)           |
+	       HINIC_MSG_HEADER_SET(0, ASYNC_MGMT_TO_PF)        |
+	       HINIC_MSG_HEADER_SET(0, SEQID)                   |
+	       HINIC_MSG_HEADER_SET(LAST_SEGMENT, LAST)         |
+	       HINIC_MSG_HEADER_SET(direction, DIRECTION)       |
+	       HINIC_MSG_HEADER_SET(cmd, CMD)                   |
+	       HINIC_MSG_HEADER_SET(HINIC_HWIF_PCI_INTF(hwif), PCI_INTF) |
+	       HINIC_MSG_HEADER_SET(HINIC_HWIF_PF_IDX(hwif), PF_IDX)     |
+	       HINIC_MSG_HEADER_SET(msg_id, MSG_ID);
+}
+
+/**
+ * prepare_mgmt_cmd - prepare the mgmt command
+ * @mgmt_cmd: pointer to the command to prepare
+ * @header: pointer of the header for the message
+ * @msg: the data of the message
+ * @msg_len: the length of the message
+ **/
+static void prepare_mgmt_cmd(u8 *mgmt_cmd, u64 *header, u8 *msg, u16 msg_len)
+{
+	memset(mgmt_cmd, 0, MGMT_MSG_RSVD_FOR_DEV);
+
+	mgmt_cmd += MGMT_MSG_RSVD_FOR_DEV;
+	memcpy(mgmt_cmd, header, sizeof(*header));
+
+	mgmt_cmd += sizeof(*header);
+	memcpy(mgmt_cmd, msg, msg_len);
+}
+
+/**
+ * mgmt_msg_len - calculate the total message length
+ * @msg_data_len: the length of the message data
+ *
+ * Return the total message length
+ **/
+static u16 mgmt_msg_len(u16 msg_data_len)
+{
+	/* RSVD + HEADER_SIZE + DATA_LEN */
+	u16 msg_len = MGMT_MSG_RSVD_FOR_DEV + sizeof(u64) + msg_data_len;
+
+	if (msg_len > MGMT_MSG_LEN_MIN)
+		msg_len = MGMT_MSG_LEN_MIN +
+			   ALIGN((msg_len - MGMT_MSG_LEN_MIN),
+				 MGMT_MSG_LEN_STEP);
+	else
+		msg_len = MGMT_MSG_LEN_MIN;
+
+	return msg_len;
+}
+
+/**
+ * send_msg_to_mgmt - send message to mgmt by API CMD
+ * @pf_to_mgmt: PF to MGMT channel
+ * @mod: module in the chip that will get the message
+ * @cmd: command of the message
+ * @data: the msg data
+ * @data_len: the msg data length
+ * @ack_type: ask for response
+ * @direction: the direction of the original message
+ * @resp_msg_id: msg id to response for
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int send_msg_to_mgmt(struct hinic_pf_to_mgmt *pf_to_mgmt,
+			    enum hinic_mod_type mod, u8 cmd,
+			    u8 *data, u16 data_len,
+			    enum msg_ack_type ack_type,
+			    enum mgmt_direction_type direction,
+			    u16 resp_msg_id)
+{
+	struct hinic_api_cmd_chain *chain;
+	u64 header;
+	u16 msg_id;
+
+	msg_id = SYNC_MSG_ID(pf_to_mgmt);
+
+	if (direction == MGMT_RESP) {
+		header = prepare_header(pf_to_mgmt, data_len, mod, ack_type,
+					direction, cmd, resp_msg_id);
+	} else {
+		SYNC_MSG_ID_INC(pf_to_mgmt);
+		header = prepare_header(pf_to_mgmt, data_len, mod, ack_type,
+					direction, cmd, msg_id);
+	}
+
+	prepare_mgmt_cmd(pf_to_mgmt->sync_msg_buf, &header, data, data_len);
+
+	chain = pf_to_mgmt->cmd_chain[HINIC_API_CMD_WRITE_TO_MGMT_CPU];
+	return hinic_api_cmd_write(chain, HINIC_NODE_ID_MGMT,
+				   pf_to_mgmt->sync_msg_buf,
+				   mgmt_msg_len(data_len));
+}
+
+/**
+ * msg_to_mgmt_sync - send sync message to mgmt
+ * @pf_to_mgmt: PF to MGMT channel
+ * @mod: module in the chip that will get the message
+ * @cmd: command of the message
+ * @buf_in: the msg data
+ * @in_size: the msg data length
+ * @buf_out: response
+ * @out_size: response length
+ * @direction: the direction of the original message
+ * @resp_msg_id: msg id to response for
+ * @timeout: time-out period of waiting for response
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int msg_to_mgmt_sync(struct hinic_pf_to_mgmt *pf_to_mgmt,
+			    enum hinic_mod_type mod, u8 cmd,
+			    u8 *buf_in, u16 in_size,
+			    u8 *buf_out, u16 *out_size,
+			    enum mgmt_direction_type direction,
+			    u16 resp_msg_id, u32 timeout)
+{
+	struct hinic_hwif *hwif = pf_to_mgmt->hwif;
+	struct pci_dev *pdev = hwif->pdev;
+	struct hinic_recv_msg *recv_msg;
+	struct completion *recv_done;
+	unsigned long timeo;
+	u16 msg_id;
+	int err;
+
+	/* Lock the sync_msg_buf */
+	down(&pf_to_mgmt->sync_msg_lock);
+
+	recv_msg = &pf_to_mgmt->recv_resp_msg_from_mgmt;
+	recv_done = &recv_msg->recv_done;
+
+	if (resp_msg_id == MSG_NOT_RESP)
+		msg_id = SYNC_MSG_ID(pf_to_mgmt);
+	else
+		msg_id = resp_msg_id;
+
+	init_completion(recv_done);
+
+	err = send_msg_to_mgmt(pf_to_mgmt, mod, cmd, buf_in, in_size,
+			       MSG_ACK, direction, resp_msg_id);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to send sync msg to mgmt\n");
+		goto unlock_sync_msg;
+	}
+
+	timeo = msecs_to_jiffies(timeout ? timeout : MGMT_MSG_TIMEOUT);
+
+	if (!wait_for_completion_timeout(recv_done, timeo)) {
+		dev_err(&pdev->dev, "MGMT timeout, MSG id = %d\n", msg_id);
+		hinic_dump_aeq_info(pf_to_mgmt->hwdev);
+		err = -ETIMEDOUT;
+		goto unlock_sync_msg;
+	}
+
+	smp_rmb();      /* verify reading after completion */
+
+	if (recv_msg->msg_id != msg_id) {
+		dev_err(&pdev->dev, "incorrect MSG for id = %d\n", msg_id);
+		err = -EFAULT;
+		goto unlock_sync_msg;
+	}
+
+	if (buf_out && recv_msg->msg_len <= MAX_PF_MGMT_BUF_SIZE) {
+		memcpy(buf_out, recv_msg->msg, recv_msg->msg_len);
+		*out_size = recv_msg->msg_len;
+	}
+
+unlock_sync_msg:
+	up(&pf_to_mgmt->sync_msg_lock);
+	return err;
+}
+
+/**
+ * msg_to_mgmt_async - send message to mgmt without response
+ * @pf_to_mgmt: PF to MGMT channel
+ * @mod: module in the chip that will get the message
+ * @cmd: command of the message
+ * @buf_in: the msg data
+ * @in_size: the msg data length
+ * @direction: the direction of the original message
+ * @resp_msg_id: msg id to response for
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int msg_to_mgmt_async(struct hinic_pf_to_mgmt *pf_to_mgmt,
+			     enum hinic_mod_type mod, u8 cmd,
+			     u8 *buf_in, u16 in_size,
+			     enum mgmt_direction_type direction,
+			     u16 resp_msg_id)
+{
+	int err;
+
+	/* Lock the sync_msg_buf */
+	down(&pf_to_mgmt->sync_msg_lock);
+
+	err = send_msg_to_mgmt(pf_to_mgmt, mod, cmd, buf_in, in_size,
+			       MSG_NO_ACK, direction, resp_msg_id);
+
+	up(&pf_to_mgmt->sync_msg_lock);
+	return err;
+}
+
+/**
+ * hinic_msg_to_mgmt - send message to mgmt
+ * @pf_to_mgmt: PF to MGMT channel
+ * @mod: module in the chip that will get the message
+ * @cmd: command of the message
+ * @buf_in: the msg data
+ * @in_size: the msg data length
+ * @buf_out: response
+ * @out_size: returned response length
+ * @sync: sync msg or async msg
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+int hinic_msg_to_mgmt(struct hinic_pf_to_mgmt *pf_to_mgmt,
+		      enum hinic_mod_type mod, u8 cmd,
+		      void *buf_in, u16 in_size, void *buf_out, u16 *out_size,
+		      enum hinic_mgmt_msg_type sync)
+{
+	struct hinic_hwif *hwif = pf_to_mgmt->hwif;
+	struct pci_dev *pdev = hwif->pdev;
+	u32 timeout = 0;
+
+	if (sync != HINIC_MGMT_MSG_SYNC) {
+		dev_err(&pdev->dev, "Invalid MGMT msg type\n");
+		return -EINVAL;
+	}
+
+	if (!MSG_SZ_IS_VALID(in_size)) {
+		dev_err(&pdev->dev, "Invalid MGMT msg buffer size\n");
+		return -EINVAL;
+	}
+
+	if (HINIC_IS_VF(hwif)) {
+		if (cmd == HINIC_PORT_CMD_SET_FUNC_STATE)
+			timeout = SET_FUNC_PORT_MBOX_TIMEOUT;
+
+		return hinic_mbox_to_pf(pf_to_mgmt->hwdev, mod, cmd, buf_in,
+					in_size, buf_out, out_size, timeout);
+	} else {
+		if (cmd == HINIC_PORT_CMD_SET_FUNC_STATE)
+			timeout = SET_FUNC_PORT_MGMT_TIMEOUT;
+		else if (cmd == HINIC_PORT_CMD_UPDATE_FW)
+			timeout = UPDATE_FW_MGMT_TIMEOUT;
+
+		return msg_to_mgmt_sync(pf_to_mgmt, mod, cmd, buf_in, in_size,
+				buf_out, out_size, MGMT_DIRECT_SEND,
+				MSG_NOT_RESP, timeout);
+	}
+}
+
+static void recv_mgmt_msg_work_handler(struct work_struct *work)
+{
+	struct hinic_mgmt_msg_handle_work *mgmt_work =
+		container_of(work, struct hinic_mgmt_msg_handle_work, work);
+	struct hinic_pf_to_mgmt *pf_to_mgmt = mgmt_work->pf_to_mgmt;
+	struct pci_dev *pdev = pf_to_mgmt->hwif->pdev;
+	u8 *buf_out = pf_to_mgmt->mgmt_ack_buf;
+	struct hinic_mgmt_cb *mgmt_cb;
+	unsigned long cb_state;
+	u16 out_size = 0;
+
+	memset(buf_out, 0, MAX_PF_MGMT_BUF_SIZE);
+
+	if (mgmt_work->mod >= HINIC_MOD_MAX) {
+		dev_err(&pdev->dev, "Unknown MGMT MSG module = %d\n",
+			mgmt_work->mod);
+		kfree(mgmt_work->msg);
+		kfree(mgmt_work);
+		return;
+	}
+
+	mgmt_cb = &pf_to_mgmt->mgmt_cb[mgmt_work->mod];
+
+	cb_state = cmpxchg(&mgmt_cb->state,
+			   HINIC_MGMT_CB_ENABLED,
+			   HINIC_MGMT_CB_ENABLED | HINIC_MGMT_CB_RUNNING);
+
+	if (cb_state == HINIC_MGMT_CB_ENABLED && mgmt_cb->cb)
+		mgmt_cb->cb(mgmt_cb->handle, mgmt_work->cmd,
+			    mgmt_work->msg, mgmt_work->msg_len,
+			    buf_out, &out_size);
+	else
+		dev_err(&pdev->dev, "No MGMT msg handler, mod: %d, cmd: %d\n",
+			mgmt_work->mod, mgmt_work->cmd);
+
+	mgmt_cb->state &= ~HINIC_MGMT_CB_RUNNING;
+
+	if (!mgmt_work->async_mgmt_to_pf)
+		/* MGMT sent sync msg, send the response */
+		msg_to_mgmt_async(pf_to_mgmt, mgmt_work->mod, mgmt_work->cmd,
+				  buf_out, out_size, MGMT_RESP,
+				  mgmt_work->msg_id);
+
+	kfree(mgmt_work->msg);
+	kfree(mgmt_work);
+}
+
+/**
+ * mgmt_recv_msg_handler - handler for message from mgmt cpu
+ * @pf_to_mgmt: PF to MGMT channel
+ * @recv_msg: received message details
+ **/
+static void mgmt_recv_msg_handler(struct hinic_pf_to_mgmt *pf_to_mgmt,
+				  struct hinic_recv_msg *recv_msg)
+{
+	struct hinic_mgmt_msg_handle_work *mgmt_work = NULL;
+
+	mgmt_work = kzalloc(sizeof(*mgmt_work), GFP_KERNEL);
+	if (!mgmt_work)
+		return;
+
+	if (recv_msg->msg_len) {
+		mgmt_work->msg = kzalloc(recv_msg->msg_len, GFP_KERNEL);
+		if (!mgmt_work->msg) {
+			kfree(mgmt_work);
+			return;
+		}
+	}
+
+	mgmt_work->pf_to_mgmt = pf_to_mgmt;
+	mgmt_work->msg_len = recv_msg->msg_len;
+	memcpy(mgmt_work->msg, recv_msg->msg, recv_msg->msg_len);
+	mgmt_work->msg_id = recv_msg->msg_id;
+	mgmt_work->mod = recv_msg->mod;
+	mgmt_work->cmd = recv_msg->cmd;
+	mgmt_work->async_mgmt_to_pf = recv_msg->async_mgmt_to_pf;
+
+	INIT_WORK(&mgmt_work->work, recv_mgmt_msg_work_handler);
+	queue_work(pf_to_mgmt->workq, &mgmt_work->work);
+}
+
+/**
+ * mgmt_resp_msg_handler - handler for a response message from mgmt cpu
+ * @pf_to_mgmt: PF to MGMT channel
+ * @recv_msg: received message details
+ **/
+static void mgmt_resp_msg_handler(struct hinic_pf_to_mgmt *pf_to_mgmt,
+				  struct hinic_recv_msg *recv_msg)
+{
+	wmb();  /* verify writing all, before reading */
+
+	complete(&recv_msg->recv_done);
+}
+
+/**
+ * recv_mgmt_msg_handler - handler for a message from mgmt cpu
+ * @pf_to_mgmt: PF to MGMT channel
+ * @header: the header of the message
+ * @recv_msg: received message details
+ **/
+static void recv_mgmt_msg_handler(struct hinic_pf_to_mgmt *pf_to_mgmt,
+				  u64 *header, struct hinic_recv_msg *recv_msg)
+{
+	struct hinic_hwif *hwif = pf_to_mgmt->hwif;
+	struct pci_dev *pdev = hwif->pdev;
+	int seq_id, seg_len;
+	u8 *msg_body;
+
+	seq_id = HINIC_MSG_HEADER_GET(*header, SEQID);
+	seg_len = HINIC_MSG_HEADER_GET(*header, SEG_LEN);
+
+	if (seq_id >= (MAX_MSG_LEN / SEGMENT_LEN)) {
+		dev_err(&pdev->dev, "recv big mgmt msg\n");
+		return;
+	}
+
+	msg_body = (u8 *)header + sizeof(*header);
+	memcpy(recv_msg->msg + seq_id * SEGMENT_LEN, msg_body, seg_len);
+
+	if (!HINIC_MSG_HEADER_GET(*header, LAST))
+		return;
+
+	recv_msg->cmd = HINIC_MSG_HEADER_GET(*header, CMD);
+	recv_msg->mod = HINIC_MSG_HEADER_GET(*header, MODULE);
+	recv_msg->async_mgmt_to_pf = HINIC_MSG_HEADER_GET(*header,
+							  ASYNC_MGMT_TO_PF);
+	recv_msg->msg_len = HINIC_MSG_HEADER_GET(*header, MSG_LEN);
+	recv_msg->msg_id = HINIC_MSG_HEADER_GET(*header, MSG_ID);
+
+	if (HINIC_MSG_HEADER_GET(*header, DIRECTION) == MGMT_RESP)
+		mgmt_resp_msg_handler(pf_to_mgmt, recv_msg);
+	else
+		mgmt_recv_msg_handler(pf_to_mgmt, recv_msg);
+}
+
+/**
+ * mgmt_msg_aeqe_handler - handler for a mgmt message event
+ * @handle: PF to MGMT channel
+ * @data: the header of the message
+ * @size: unused
+ **/
+static void mgmt_msg_aeqe_handler(void *handle, void *data, u8 size)
+{
+	struct hinic_pf_to_mgmt *pf_to_mgmt = handle;
+	struct hinic_recv_msg *recv_msg;
+	u64 *header = (u64 *)data;
+
+	recv_msg = HINIC_MSG_HEADER_GET(*header, DIRECTION) ==
+		   MGMT_DIRECT_SEND ?
+		   &pf_to_mgmt->recv_msg_from_mgmt :
+		   &pf_to_mgmt->recv_resp_msg_from_mgmt;
+
+	recv_mgmt_msg_handler(pf_to_mgmt, header, recv_msg);
+}
+
+/**
+ * alloc_recv_msg - allocate receive message memory
+ * @pf_to_mgmt: PF to MGMT channel
+ * @recv_msg: pointer that will hold the allocated data
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int alloc_recv_msg(struct hinic_pf_to_mgmt *pf_to_mgmt,
+			  struct hinic_recv_msg *recv_msg)
+{
+	struct hinic_hwif *hwif = pf_to_mgmt->hwif;
+	struct pci_dev *pdev = hwif->pdev;
+
+	recv_msg->msg = devm_kzalloc(&pdev->dev, MAX_PF_MGMT_BUF_SIZE,
+				     GFP_KERNEL);
+	if (!recv_msg->msg)
+		return -ENOMEM;
+
+	recv_msg->buf_out = devm_kzalloc(&pdev->dev, MAX_PF_MGMT_BUF_SIZE,
+					 GFP_KERNEL);
+	if (!recv_msg->buf_out)
+		return -ENOMEM;
+
+	return 0;
+}
+
+/**
+ * alloc_msg_buf - allocate all the message buffers of PF to MGMT channel
+ * @pf_to_mgmt: PF to MGMT channel
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+static int alloc_msg_buf(struct hinic_pf_to_mgmt *pf_to_mgmt)
+{
+	struct hinic_hwif *hwif = pf_to_mgmt->hwif;
+	struct pci_dev *pdev = hwif->pdev;
+	int err;
+
+	err = alloc_recv_msg(pf_to_mgmt,
+			     &pf_to_mgmt->recv_msg_from_mgmt);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to allocate recv msg\n");
+		return err;
+	}
+
+	err = alloc_recv_msg(pf_to_mgmt,
+			     &pf_to_mgmt->recv_resp_msg_from_mgmt);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to allocate resp recv msg\n");
+		return err;
+	}
+
+	pf_to_mgmt->sync_msg_buf = devm_kzalloc(&pdev->dev,
+						MAX_PF_MGMT_BUF_SIZE,
+						GFP_KERNEL);
+	if (!pf_to_mgmt->sync_msg_buf)
+		return -ENOMEM;
+
+	pf_to_mgmt->mgmt_ack_buf = devm_kzalloc(&pdev->dev,
+						MAX_PF_MGMT_BUF_SIZE,
+						GFP_KERNEL);
+	if (!pf_to_mgmt->mgmt_ack_buf)
+		return -ENOMEM;
+
+	return 0;
+}
+
+/**
+ * hinic_pf_to_mgmt_init - initialize PF to MGMT channel
+ * @pf_to_mgmt: PF to MGMT channel
+ * @hwif: HW interface the PF to MGMT will use for accessing HW
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+int hinic_pf_to_mgmt_init(struct hinic_pf_to_mgmt *pf_to_mgmt,
+			  struct hinic_hwif *hwif)
+{
+	struct hinic_pfhwdev *pfhwdev = mgmt_to_pfhwdev(pf_to_mgmt);
+	struct hinic_hwdev *hwdev = &pfhwdev->hwdev;
+	struct pci_dev *pdev = hwif->pdev;
+	int err;
+
+	pf_to_mgmt->hwif = hwif;
+	pf_to_mgmt->hwdev = hwdev;
+
+	if (HINIC_IS_VF(hwif))
+		return 0;
+
+	err = hinic_health_reporters_create(hwdev->devlink_dev);
+	if (err)
+		return err;
+
+	sema_init(&pf_to_mgmt->sync_msg_lock, 1);
+	pf_to_mgmt->workq = create_singlethread_workqueue("hinic_mgmt");
+	if (!pf_to_mgmt->workq) {
+		dev_err(&pdev->dev, "Failed to initialize MGMT workqueue\n");
+		hinic_health_reporters_destroy(hwdev->devlink_dev);
+		return -ENOMEM;
+	}
+	pf_to_mgmt->sync_msg_id = 0;
+
+	err = alloc_msg_buf(pf_to_mgmt);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to allocate msg buffers\n");
+		destroy_workqueue(pf_to_mgmt->workq);
+		hinic_health_reporters_destroy(hwdev->devlink_dev);
+		return err;
+	}
+
+	err = hinic_api_cmd_init(pf_to_mgmt->cmd_chain, hwif);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to initialize cmd chains\n");
+		destroy_workqueue(pf_to_mgmt->workq);
+		hinic_health_reporters_destroy(hwdev->devlink_dev);
+		return err;
+	}
+
+	hinic_aeq_register_hw_cb(&hwdev->aeqs, HINIC_MSG_FROM_MGMT_CPU,
+				 pf_to_mgmt,
+				 mgmt_msg_aeqe_handler);
+	return 0;
+}
+
+/**
+ * hinic_pf_to_mgmt_free - free PF to MGMT channel
+ * @pf_to_mgmt: PF to MGMT channel
+ **/
+void hinic_pf_to_mgmt_free(struct hinic_pf_to_mgmt *pf_to_mgmt)
+{
+	struct hinic_pfhwdev *pfhwdev = mgmt_to_pfhwdev(pf_to_mgmt);
+	struct hinic_hwdev *hwdev = &pfhwdev->hwdev;
+
+	if (HINIC_IS_VF(hwdev->hwif))
+		return;
+
+	hinic_aeq_unregister_hw_cb(&hwdev->aeqs, HINIC_MSG_FROM_MGMT_CPU);
+	hinic_api_cmd_free(pf_to_mgmt->cmd_chain);
+	destroy_workqueue(pf_to_mgmt->workq);
+	hinic_health_reporters_destroy(hwdev->devlink_dev);
+}