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, 742 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw89/ser.c b/drivers/net/wireless/realtek/rtw89/ser.c
new file mode 100644
index 000000000..61db7189f
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw89/ser.c
@@ -0,0 +1,742 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright(c) 2019-2020  Realtek Corporation
+ */
+
+#include <linux/devcoredump.h>
+
+#include "cam.h"
+#include "chan.h"
+#include "debug.h"
+#include "fw.h"
+#include "mac.h"
+#include "ps.h"
+#include "reg.h"
+#include "ser.h"
+#include "util.h"
+
+#define SER_RECFG_TIMEOUT 1000
+
+enum ser_evt {
+	SER_EV_NONE,
+	SER_EV_STATE_IN,
+	SER_EV_STATE_OUT,
+	SER_EV_L1_RESET, /* M1 */
+	SER_EV_DO_RECOVERY, /* M3 */
+	SER_EV_MAC_RESET_DONE, /* M5 */
+	SER_EV_L2_RESET,
+	SER_EV_L2_RECFG_DONE,
+	SER_EV_L2_RECFG_TIMEOUT,
+	SER_EV_M3_TIMEOUT,
+	SER_EV_FW_M5_TIMEOUT,
+	SER_EV_L0_RESET,
+	SER_EV_MAXX
+};
+
+enum ser_state {
+	SER_IDLE_ST,
+	SER_RESET_TRX_ST,
+	SER_DO_HCI_ST,
+	SER_L2_RESET_ST,
+	SER_ST_MAX_ST
+};
+
+struct ser_msg {
+	struct list_head list;
+	u8 event;
+};
+
+struct state_ent {
+	u8 state;
+	char *name;
+	void (*st_func)(struct rtw89_ser *ser, u8 event);
+};
+
+struct event_ent {
+	u8 event;
+	char *name;
+};
+
+static char *ser_ev_name(struct rtw89_ser *ser, u8 event)
+{
+	if (event < SER_EV_MAXX)
+		return ser->ev_tbl[event].name;
+
+	return "err_ev_name";
+}
+
+static char *ser_st_name(struct rtw89_ser *ser)
+{
+	if (ser->state < SER_ST_MAX_ST)
+		return ser->st_tbl[ser->state].name;
+
+	return "err_st_name";
+}
+
+#define RTW89_DEF_SER_CD_TYPE(_name, _type, _size) \
+struct ser_cd_ ## _name { \
+	u32 type; \
+	u32 type_size; \
+	u64 padding; \
+	u8 data[_size]; \
+} __packed; \
+static void ser_cd_ ## _name ## _init(struct ser_cd_ ## _name *p) \
+{ \
+	p->type = _type; \
+	p->type_size = sizeof(p->data); \
+	p->padding = 0x0123456789abcdef; \
+}
+
+enum rtw89_ser_cd_type {
+	RTW89_SER_CD_FW_RSVD_PLE	= 0,
+	RTW89_SER_CD_FW_BACKTRACE	= 1,
+};
+
+RTW89_DEF_SER_CD_TYPE(fw_rsvd_ple,
+		      RTW89_SER_CD_FW_RSVD_PLE,
+		      RTW89_FW_RSVD_PLE_SIZE);
+
+RTW89_DEF_SER_CD_TYPE(fw_backtrace,
+		      RTW89_SER_CD_FW_BACKTRACE,
+		      RTW89_FW_BACKTRACE_MAX_SIZE);
+
+struct rtw89_ser_cd_buffer {
+	struct ser_cd_fw_rsvd_ple fwple;
+	struct ser_cd_fw_backtrace fwbt;
+} __packed;
+
+static struct rtw89_ser_cd_buffer *rtw89_ser_cd_prep(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_ser_cd_buffer *buf;
+
+	buf = vzalloc(sizeof(*buf));
+	if (!buf)
+		return NULL;
+
+	ser_cd_fw_rsvd_ple_init(&buf->fwple);
+	ser_cd_fw_backtrace_init(&buf->fwbt);
+
+	return buf;
+}
+
+static void rtw89_ser_cd_send(struct rtw89_dev *rtwdev,
+			      struct rtw89_ser_cd_buffer *buf)
+{
+	rtw89_debug(rtwdev, RTW89_DBG_SER, "SER sends core dump\n");
+
+	/* After calling dev_coredump, buf's lifetime is supposed to be
+	 * handled by the device coredump framework. Note that a new dump
+	 * will be discarded if a previous one hasn't been released by
+	 * framework yet.
+	 */
+	dev_coredumpv(rtwdev->dev, buf, sizeof(*buf), GFP_KERNEL);
+}
+
+static void rtw89_ser_cd_free(struct rtw89_dev *rtwdev,
+			      struct rtw89_ser_cd_buffer *buf, bool free_self)
+{
+	if (!free_self)
+		return;
+
+	rtw89_debug(rtwdev, RTW89_DBG_SER, "SER frees core dump by self\n");
+
+	/* When some problems happen during filling data of core dump,
+	 * we won't send it to device coredump framework. Instead, we
+	 * free buf by ourselves.
+	 */
+	vfree(buf);
+}
+
+static void ser_state_run(struct rtw89_ser *ser, u8 evt)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	rtw89_debug(rtwdev, RTW89_DBG_SER, "ser: %s receive %s\n",
+		    ser_st_name(ser), ser_ev_name(ser, evt));
+
+	mutex_lock(&rtwdev->mutex);
+	rtw89_leave_lps(rtwdev);
+	mutex_unlock(&rtwdev->mutex);
+
+	ser->st_tbl[ser->state].st_func(ser, evt);
+}
+
+static void ser_state_goto(struct rtw89_ser *ser, u8 new_state)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	if (ser->state == new_state || new_state >= SER_ST_MAX_ST)
+		return;
+	ser_state_run(ser, SER_EV_STATE_OUT);
+
+	rtw89_debug(rtwdev, RTW89_DBG_SER, "ser: %s goto -> %s\n",
+		    ser_st_name(ser), ser->st_tbl[new_state].name);
+
+	ser->state = new_state;
+	ser_state_run(ser, SER_EV_STATE_IN);
+}
+
+static struct ser_msg *__rtw89_ser_dequeue_msg(struct rtw89_ser *ser)
+{
+	struct ser_msg *msg;
+
+	spin_lock_irq(&ser->msg_q_lock);
+	msg = list_first_entry_or_null(&ser->msg_q, struct ser_msg, list);
+	if (msg)
+		list_del(&msg->list);
+	spin_unlock_irq(&ser->msg_q_lock);
+
+	return msg;
+}
+
+static void rtw89_ser_hdl_work(struct work_struct *work)
+{
+	struct ser_msg *msg;
+	struct rtw89_ser *ser = container_of(work, struct rtw89_ser,
+					     ser_hdl_work);
+
+	while ((msg = __rtw89_ser_dequeue_msg(ser))) {
+		ser_state_run(ser, msg->event);
+		kfree(msg);
+	}
+}
+
+static int ser_send_msg(struct rtw89_ser *ser, u8 event)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+	struct ser_msg *msg = NULL;
+
+	if (test_bit(RTW89_SER_DRV_STOP_RUN, ser->flags))
+		return -EIO;
+
+	msg = kmalloc(sizeof(*msg), GFP_ATOMIC);
+	if (!msg)
+		return -ENOMEM;
+
+	msg->event = event;
+
+	spin_lock_irq(&ser->msg_q_lock);
+	list_add(&msg->list, &ser->msg_q);
+	spin_unlock_irq(&ser->msg_q_lock);
+
+	ieee80211_queue_work(rtwdev->hw, &ser->ser_hdl_work);
+	return 0;
+}
+
+static void rtw89_ser_alarm_work(struct work_struct *work)
+{
+	struct rtw89_ser *ser = container_of(work, struct rtw89_ser,
+					     ser_alarm_work.work);
+
+	ser_send_msg(ser, ser->alarm_event);
+	ser->alarm_event = SER_EV_NONE;
+}
+
+static void ser_set_alarm(struct rtw89_ser *ser, u32 ms, u8 event)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	if (test_bit(RTW89_SER_DRV_STOP_RUN, ser->flags))
+		return;
+
+	ser->alarm_event = event;
+	ieee80211_queue_delayed_work(rtwdev->hw, &ser->ser_alarm_work,
+				     msecs_to_jiffies(ms));
+}
+
+static void ser_del_alarm(struct rtw89_ser *ser)
+{
+	cancel_delayed_work(&ser->ser_alarm_work);
+	ser->alarm_event = SER_EV_NONE;
+}
+
+/* driver function */
+static void drv_stop_tx(struct rtw89_ser *ser)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	ieee80211_stop_queues(rtwdev->hw);
+	set_bit(RTW89_SER_DRV_STOP_TX, ser->flags);
+}
+
+static void drv_stop_rx(struct rtw89_ser *ser)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	clear_bit(RTW89_FLAG_RUNNING, rtwdev->flags);
+	set_bit(RTW89_SER_DRV_STOP_RX, ser->flags);
+}
+
+static void drv_trx_reset(struct rtw89_ser *ser)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	rtw89_hci_reset(rtwdev);
+}
+
+static void drv_resume_tx(struct rtw89_ser *ser)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	if (!test_bit(RTW89_SER_DRV_STOP_TX, ser->flags))
+		return;
+
+	ieee80211_wake_queues(rtwdev->hw);
+	clear_bit(RTW89_SER_DRV_STOP_TX, ser->flags);
+}
+
+static void drv_resume_rx(struct rtw89_ser *ser)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	if (!test_bit(RTW89_SER_DRV_STOP_RX, ser->flags))
+		return;
+
+	set_bit(RTW89_FLAG_RUNNING, rtwdev->flags);
+	clear_bit(RTW89_SER_DRV_STOP_RX, ser->flags);
+}
+
+static void ser_reset_vif(struct rtw89_dev *rtwdev, struct rtw89_vif *rtwvif)
+{
+	rtw89_core_release_bit_map(rtwdev->hw_port, rtwvif->port);
+	rtwvif->net_type = RTW89_NET_TYPE_NO_LINK;
+	rtwvif->trigger = false;
+}
+
+static void ser_sta_deinit_cam_iter(void *data, struct ieee80211_sta *sta)
+{
+	struct rtw89_vif *rtwvif = (struct rtw89_vif *)data;
+	struct rtw89_dev *rtwdev = rtwvif->rtwdev;
+	struct rtw89_sta *rtwsta = (struct rtw89_sta *)sta->drv_priv;
+
+	if (rtwvif->net_type == RTW89_NET_TYPE_AP_MODE || sta->tdls)
+		rtw89_cam_deinit_addr_cam(rtwdev, &rtwsta->addr_cam);
+	if (sta->tdls)
+		rtw89_cam_deinit_bssid_cam(rtwdev, &rtwsta->bssid_cam);
+
+	INIT_LIST_HEAD(&rtwsta->ba_cam_list);
+}
+
+static void ser_deinit_cam(struct rtw89_dev *rtwdev, struct rtw89_vif *rtwvif)
+{
+	ieee80211_iterate_stations_atomic(rtwdev->hw,
+					  ser_sta_deinit_cam_iter,
+					  rtwvif);
+
+	rtw89_cam_deinit(rtwdev, rtwvif);
+
+	bitmap_zero(rtwdev->cam_info.ba_cam_map, RTW89_MAX_BA_CAM_NUM);
+}
+
+static void ser_reset_mac_binding(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_vif *rtwvif;
+
+	rtw89_cam_reset_keys(rtwdev);
+	rtw89_for_each_rtwvif(rtwdev, rtwvif)
+		ser_deinit_cam(rtwdev, rtwvif);
+
+	rtw89_core_release_all_bits_map(rtwdev->mac_id_map, RTW89_MAX_MAC_ID_NUM);
+	rtw89_for_each_rtwvif(rtwdev, rtwvif)
+		ser_reset_vif(rtwdev, rtwvif);
+}
+
+/* hal function */
+static int hal_enable_dma(struct rtw89_ser *ser)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+	int ret;
+
+	if (!test_bit(RTW89_SER_HAL_STOP_DMA, ser->flags))
+		return 0;
+
+	if (!rtwdev->hci.ops->mac_lv1_rcvy)
+		return -EIO;
+
+	ret = rtwdev->hci.ops->mac_lv1_rcvy(rtwdev, RTW89_LV1_RCVY_STEP_2);
+	if (!ret)
+		clear_bit(RTW89_SER_HAL_STOP_DMA, ser->flags);
+
+	return ret;
+}
+
+static int hal_stop_dma(struct rtw89_ser *ser)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+	int ret;
+
+	if (!rtwdev->hci.ops->mac_lv1_rcvy)
+		return -EIO;
+
+	ret = rtwdev->hci.ops->mac_lv1_rcvy(rtwdev, RTW89_LV1_RCVY_STEP_1);
+	if (!ret)
+		set_bit(RTW89_SER_HAL_STOP_DMA, ser->flags);
+
+	return ret;
+}
+
+static void hal_send_m2_event(struct rtw89_ser *ser)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	rtw89_mac_set_err_status(rtwdev, MAC_AX_ERR_L1_DISABLE_EN);
+}
+
+static void hal_send_m4_event(struct rtw89_ser *ser)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	rtw89_mac_set_err_status(rtwdev, MAC_AX_ERR_L1_RCVY_EN);
+}
+
+/* state handler */
+static void ser_idle_st_hdl(struct rtw89_ser *ser, u8 evt)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	switch (evt) {
+	case SER_EV_STATE_IN:
+		rtw89_hci_recovery_complete(rtwdev);
+		clear_bit(RTW89_FLAG_CRASH_SIMULATING, rtwdev->flags);
+		break;
+	case SER_EV_L1_RESET:
+		ser_state_goto(ser, SER_RESET_TRX_ST);
+		break;
+	case SER_EV_L2_RESET:
+		ser_state_goto(ser, SER_L2_RESET_ST);
+		break;
+	case SER_EV_STATE_OUT:
+		rtw89_hci_recovery_start(rtwdev);
+		break;
+	default:
+		break;
+	}
+}
+
+static void ser_reset_trx_st_hdl(struct rtw89_ser *ser, u8 evt)
+{
+	switch (evt) {
+	case SER_EV_STATE_IN:
+		drv_stop_tx(ser);
+
+		if (hal_stop_dma(ser)) {
+			ser_state_goto(ser, SER_L2_RESET_ST);
+			break;
+		}
+
+		drv_stop_rx(ser);
+		drv_trx_reset(ser);
+
+		/* wait m3 */
+		hal_send_m2_event(ser);
+
+		/* set alarm to prevent FW response timeout */
+		ser_set_alarm(ser, 1000, SER_EV_M3_TIMEOUT);
+		break;
+
+	case SER_EV_DO_RECOVERY:
+		ser_state_goto(ser, SER_DO_HCI_ST);
+		break;
+
+	case SER_EV_M3_TIMEOUT:
+		ser_state_goto(ser, SER_L2_RESET_ST);
+		break;
+
+	case SER_EV_STATE_OUT:
+		ser_del_alarm(ser);
+		hal_enable_dma(ser);
+		drv_resume_rx(ser);
+		drv_resume_tx(ser);
+		break;
+
+	default:
+		break;
+	}
+}
+
+static void ser_do_hci_st_hdl(struct rtw89_ser *ser, u8 evt)
+{
+	switch (evt) {
+	case SER_EV_STATE_IN:
+		/* wait m5 */
+		hal_send_m4_event(ser);
+
+		/* prevent FW response timeout */
+		ser_set_alarm(ser, 1000, SER_EV_FW_M5_TIMEOUT);
+		break;
+
+	case SER_EV_FW_M5_TIMEOUT:
+		ser_state_goto(ser, SER_L2_RESET_ST);
+		break;
+
+	case SER_EV_MAC_RESET_DONE:
+		ser_state_goto(ser, SER_IDLE_ST);
+		break;
+
+	case SER_EV_STATE_OUT:
+		ser_del_alarm(ser);
+		break;
+
+	default:
+		break;
+	}
+}
+
+static void ser_mac_mem_dump(struct rtw89_dev *rtwdev, u8 *buf,
+			     u8 sel, u32 start_addr, u32 len)
+{
+	u32 *ptr = (u32 *)buf;
+	u32 base_addr, start_page, residue;
+	u32 cnt = 0;
+	u32 i;
+
+	start_page = start_addr / MAC_MEM_DUMP_PAGE_SIZE;
+	residue = start_addr % MAC_MEM_DUMP_PAGE_SIZE;
+	base_addr = rtw89_mac_mem_base_addrs[sel];
+	base_addr += start_page * MAC_MEM_DUMP_PAGE_SIZE;
+
+	while (cnt < len) {
+		rtw89_write32(rtwdev, R_AX_FILTER_MODEL_ADDR, base_addr);
+
+		for (i = R_AX_INDIR_ACCESS_ENTRY + residue;
+		     i < R_AX_INDIR_ACCESS_ENTRY + MAC_MEM_DUMP_PAGE_SIZE;
+		     i += 4, ptr++) {
+			*ptr = rtw89_read32(rtwdev, i);
+			cnt += 4;
+			if (cnt >= len)
+				break;
+		}
+
+		residue = 0;
+		base_addr += MAC_MEM_DUMP_PAGE_SIZE;
+	}
+}
+
+static void rtw89_ser_fw_rsvd_ple_dump(struct rtw89_dev *rtwdev, u8 *buf)
+{
+	u32 start_addr = rtwdev->chip->rsvd_ple_ofst;
+
+	rtw89_debug(rtwdev, RTW89_DBG_SER,
+		    "dump mem for fw rsvd payload engine (start addr: 0x%x)\n",
+		    start_addr);
+	ser_mac_mem_dump(rtwdev, buf, RTW89_MAC_MEM_SHARED_BUF, start_addr,
+			 RTW89_FW_RSVD_PLE_SIZE);
+}
+
+struct __fw_backtrace_entry {
+	u32 wcpu_addr;
+	u32 size;
+	u32 key;
+} __packed;
+
+struct __fw_backtrace_info {
+	u32 ra;
+	u32 sp;
+} __packed;
+
+static_assert(RTW89_FW_BACKTRACE_INFO_SIZE ==
+	      sizeof(struct __fw_backtrace_info));
+
+static int rtw89_ser_fw_backtrace_dump(struct rtw89_dev *rtwdev, u8 *buf,
+				       const struct __fw_backtrace_entry *ent)
+{
+	struct __fw_backtrace_info *ptr = (struct __fw_backtrace_info *)buf;
+	u32 fwbt_addr = ent->wcpu_addr & RTW89_WCPU_BASE_MASK;
+	u32 fwbt_size = ent->size;
+	u32 fwbt_key = ent->key;
+	u32 i;
+
+	if (fwbt_addr == 0) {
+		rtw89_warn(rtwdev, "FW backtrace invalid address: 0x%x\n",
+			   fwbt_addr);
+		return -EINVAL;
+	}
+
+	if (fwbt_key != RTW89_FW_BACKTRACE_KEY) {
+		rtw89_warn(rtwdev, "FW backtrace invalid key: 0x%x\n",
+			   fwbt_key);
+		return -EINVAL;
+	}
+
+	if (fwbt_size == 0 || !RTW89_VALID_FW_BACKTRACE_SIZE(fwbt_size) ||
+	    fwbt_size > RTW89_FW_BACKTRACE_MAX_SIZE) {
+		rtw89_warn(rtwdev, "FW backtrace invalid size: 0x%x\n",
+			   fwbt_size);
+		return -EINVAL;
+	}
+
+	rtw89_debug(rtwdev, RTW89_DBG_SER, "dump fw backtrace start\n");
+	rtw89_write32(rtwdev, R_AX_FILTER_MODEL_ADDR, fwbt_addr);
+
+	for (i = R_AX_INDIR_ACCESS_ENTRY;
+	     i < R_AX_INDIR_ACCESS_ENTRY + fwbt_size;
+	     i += RTW89_FW_BACKTRACE_INFO_SIZE, ptr++) {
+		*ptr = (struct __fw_backtrace_info){
+			.ra = rtw89_read32(rtwdev, i),
+			.sp = rtw89_read32(rtwdev, i + 4),
+		};
+		rtw89_debug(rtwdev, RTW89_DBG_SER,
+			    "next sp: 0x%x, next ra: 0x%x\n",
+			    ptr->sp, ptr->ra);
+	}
+
+	rtw89_debug(rtwdev, RTW89_DBG_SER, "dump fw backtrace end\n");
+	return 0;
+}
+
+static void ser_l2_reset_st_pre_hdl(struct rtw89_ser *ser)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+	struct rtw89_ser_cd_buffer *buf;
+	struct __fw_backtrace_entry fwbt_ent;
+	int ret = 0;
+
+	buf = rtw89_ser_cd_prep(rtwdev);
+	if (!buf) {
+		ret = -ENOMEM;
+		goto bottom;
+	}
+
+	rtw89_ser_fw_rsvd_ple_dump(rtwdev, buf->fwple.data);
+
+	fwbt_ent = *(struct __fw_backtrace_entry *)buf->fwple.data;
+	ret = rtw89_ser_fw_backtrace_dump(rtwdev, buf->fwbt.data, &fwbt_ent);
+	if (ret)
+		goto bottom;
+
+	rtw89_ser_cd_send(rtwdev, buf);
+
+bottom:
+	rtw89_ser_cd_free(rtwdev, buf, !!ret);
+
+	ser_reset_mac_binding(rtwdev);
+	rtw89_core_stop(rtwdev);
+	rtw89_entity_init(rtwdev);
+	rtw89_fw_release_general_pkt_list(rtwdev, false);
+	INIT_LIST_HEAD(&rtwdev->rtwvifs_list);
+}
+
+static void ser_l2_reset_st_hdl(struct rtw89_ser *ser, u8 evt)
+{
+	struct rtw89_dev *rtwdev = container_of(ser, struct rtw89_dev, ser);
+
+	switch (evt) {
+	case SER_EV_STATE_IN:
+		mutex_lock(&rtwdev->mutex);
+		ser_l2_reset_st_pre_hdl(ser);
+		mutex_unlock(&rtwdev->mutex);
+
+		ieee80211_restart_hw(rtwdev->hw);
+		ser_set_alarm(ser, SER_RECFG_TIMEOUT, SER_EV_L2_RECFG_TIMEOUT);
+		break;
+
+	case SER_EV_L2_RECFG_TIMEOUT:
+		rtw89_info(rtwdev, "Err: ser L2 re-config timeout\n");
+		fallthrough;
+	case SER_EV_L2_RECFG_DONE:
+		ser_state_goto(ser, SER_IDLE_ST);
+		break;
+
+	case SER_EV_STATE_OUT:
+		ser_del_alarm(ser);
+		break;
+
+	default:
+		break;
+	}
+}
+
+static const struct event_ent ser_ev_tbl[] = {
+	{SER_EV_NONE, "SER_EV_NONE"},
+	{SER_EV_STATE_IN, "SER_EV_STATE_IN"},
+	{SER_EV_STATE_OUT, "SER_EV_STATE_OUT"},
+	{SER_EV_L1_RESET, "SER_EV_L1_RESET"},
+	{SER_EV_DO_RECOVERY, "SER_EV_DO_RECOVERY m3"},
+	{SER_EV_MAC_RESET_DONE, "SER_EV_MAC_RESET_DONE m5"},
+	{SER_EV_L2_RESET, "SER_EV_L2_RESET"},
+	{SER_EV_L2_RECFG_DONE, "SER_EV_L2_RECFG_DONE"},
+	{SER_EV_L2_RECFG_TIMEOUT, "SER_EV_L2_RECFG_TIMEOUT"},
+	{SER_EV_M3_TIMEOUT, "SER_EV_M3_TIMEOUT"},
+	{SER_EV_FW_M5_TIMEOUT, "SER_EV_FW_M5_TIMEOUT"},
+	{SER_EV_L0_RESET, "SER_EV_L0_RESET"},
+	{SER_EV_MAXX, "SER_EV_MAX"}
+};
+
+static const struct state_ent ser_st_tbl[] = {
+	{SER_IDLE_ST, "SER_IDLE_ST", ser_idle_st_hdl},
+	{SER_RESET_TRX_ST, "SER_RESET_TRX_ST", ser_reset_trx_st_hdl},
+	{SER_DO_HCI_ST, "SER_DO_HCI_ST", ser_do_hci_st_hdl},
+	{SER_L2_RESET_ST, "SER_L2_RESET_ST", ser_l2_reset_st_hdl}
+};
+
+int rtw89_ser_init(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_ser *ser = &rtwdev->ser;
+
+	memset(ser, 0, sizeof(*ser));
+	INIT_LIST_HEAD(&ser->msg_q);
+	ser->state = SER_IDLE_ST;
+	ser->st_tbl = ser_st_tbl;
+	ser->ev_tbl = ser_ev_tbl;
+
+	bitmap_zero(ser->flags, RTW89_NUM_OF_SER_FLAGS);
+	spin_lock_init(&ser->msg_q_lock);
+	INIT_WORK(&ser->ser_hdl_work, rtw89_ser_hdl_work);
+	INIT_DELAYED_WORK(&ser->ser_alarm_work, rtw89_ser_alarm_work);
+	return 0;
+}
+
+int rtw89_ser_deinit(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_ser *ser = (struct rtw89_ser *)&rtwdev->ser;
+
+	set_bit(RTW89_SER_DRV_STOP_RUN, ser->flags);
+	cancel_delayed_work_sync(&ser->ser_alarm_work);
+	cancel_work_sync(&ser->ser_hdl_work);
+	clear_bit(RTW89_SER_DRV_STOP_RUN, ser->flags);
+	return 0;
+}
+
+void rtw89_ser_recfg_done(struct rtw89_dev *rtwdev)
+{
+	ser_send_msg(&rtwdev->ser, SER_EV_L2_RECFG_DONE);
+}
+
+int rtw89_ser_notify(struct rtw89_dev *rtwdev, u32 err)
+{
+	u8 event = SER_EV_NONE;
+
+	rtw89_info(rtwdev, "SER catches error: 0x%x\n", err);
+
+	switch (err) {
+	case MAC_AX_ERR_L1_ERR_DMAC:
+	case MAC_AX_ERR_L0_PROMOTE_TO_L1:
+		event = SER_EV_L1_RESET; /* M1 */
+		break;
+	case MAC_AX_ERR_L1_RESET_DISABLE_DMAC_DONE:
+		event = SER_EV_DO_RECOVERY; /* M3 */
+		break;
+	case MAC_AX_ERR_L1_RESET_RECOVERY_DONE:
+		event = SER_EV_MAC_RESET_DONE; /* M5 */
+		break;
+	case MAC_AX_ERR_L0_ERR_CMAC0:
+	case MAC_AX_ERR_L0_ERR_CMAC1:
+	case MAC_AX_ERR_L0_RESET_DONE:
+		event = SER_EV_L0_RESET;
+		break;
+	default:
+		if (err == MAC_AX_ERR_L1_PROMOTE_TO_L2 ||
+		    (err >= MAC_AX_ERR_L2_ERR_AH_DMA &&
+		     err <= MAC_AX_GET_ERR_MAX))
+			event = SER_EV_L2_RESET;
+		break;
+	}
+
+	if (event == SER_EV_NONE) {
+		rtw89_warn(rtwdev, "SER cannot recognize error: 0x%x\n", err);
+		return -EINVAL;
+	}
+
+	ser_send_msg(&rtwdev->ser, event);
+	return 0;
+}
+EXPORT_SYMBOL(rtw89_ser_notify);