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, 452 insertions, 0 deletions

diff --git a/drivers/usb/common/usb-otg-fsm.c b/drivers/usb/common/usb-otg-fsm.c
new file mode 100644
index 000000000..0697fde51
--- /dev/null
+++ b/drivers/usb/common/usb-otg-fsm.c
@@ -0,0 +1,452 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * OTG Finite State Machine from OTG spec
+ *
+ * Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
+ *
+ * Author:	Li Yang <LeoLi@freescale.com>
+ *		Jerry Huang <Chang-Ming.Huang@freescale.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/usb.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/otg-fsm.h>
+
+#ifdef VERBOSE
+#define VDBG(fmt, args...) pr_debug("[%s]  " fmt, \
+				 __func__, ## args)
+#else
+#define VDBG(stuff...)	do {} while (0)
+#endif
+
+/* Change USB protocol when there is a protocol change */
+static int otg_set_protocol(struct otg_fsm *fsm, int protocol)
+{
+	int ret = 0;
+
+	if (fsm->protocol != protocol) {
+		VDBG("Changing role fsm->protocol= %d; new protocol= %d\n",
+			fsm->protocol, protocol);
+		/* stop old protocol */
+		if (fsm->protocol == PROTO_HOST)
+			ret = otg_start_host(fsm, 0);
+		else if (fsm->protocol == PROTO_GADGET)
+			ret = otg_start_gadget(fsm, 0);
+		if (ret)
+			return ret;
+
+		/* start new protocol */
+		if (protocol == PROTO_HOST)
+			ret = otg_start_host(fsm, 1);
+		else if (protocol == PROTO_GADGET)
+			ret = otg_start_gadget(fsm, 1);
+		if (ret)
+			return ret;
+
+		fsm->protocol = protocol;
+		return 0;
+	}
+
+	return 0;
+}
+
+/* Called when leaving a state.  Do state clean up jobs here */
+static void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
+{
+	switch (old_state) {
+	case OTG_STATE_B_IDLE:
+		otg_del_timer(fsm, B_SE0_SRP);
+		fsm->b_se0_srp = 0;
+		fsm->adp_sns = 0;
+		fsm->adp_prb = 0;
+		break;
+	case OTG_STATE_B_SRP_INIT:
+		fsm->data_pulse = 0;
+		fsm->b_srp_done = 0;
+		break;
+	case OTG_STATE_B_PERIPHERAL:
+		if (fsm->otg->gadget)
+			fsm->otg->gadget->host_request_flag = 0;
+		break;
+	case OTG_STATE_B_WAIT_ACON:
+		otg_del_timer(fsm, B_ASE0_BRST);
+		fsm->b_ase0_brst_tmout = 0;
+		break;
+	case OTG_STATE_B_HOST:
+		break;
+	case OTG_STATE_A_IDLE:
+		fsm->adp_prb = 0;
+		break;
+	case OTG_STATE_A_WAIT_VRISE:
+		otg_del_timer(fsm, A_WAIT_VRISE);
+		fsm->a_wait_vrise_tmout = 0;
+		break;
+	case OTG_STATE_A_WAIT_BCON:
+		otg_del_timer(fsm, A_WAIT_BCON);
+		fsm->a_wait_bcon_tmout = 0;
+		break;
+	case OTG_STATE_A_HOST:
+		otg_del_timer(fsm, A_WAIT_ENUM);
+		break;
+	case OTG_STATE_A_SUSPEND:
+		otg_del_timer(fsm, A_AIDL_BDIS);
+		fsm->a_aidl_bdis_tmout = 0;
+		fsm->a_suspend_req_inf = 0;
+		break;
+	case OTG_STATE_A_PERIPHERAL:
+		otg_del_timer(fsm, A_BIDL_ADIS);
+		fsm->a_bidl_adis_tmout = 0;
+		if (fsm->otg->gadget)
+			fsm->otg->gadget->host_request_flag = 0;
+		break;
+	case OTG_STATE_A_WAIT_VFALL:
+		otg_del_timer(fsm, A_WAIT_VFALL);
+		fsm->a_wait_vfall_tmout = 0;
+		otg_del_timer(fsm, A_WAIT_VRISE);
+		break;
+	case OTG_STATE_A_VBUS_ERR:
+		break;
+	default:
+		break;
+	}
+}
+
+static void otg_hnp_polling_work(struct work_struct *work)
+{
+	struct otg_fsm *fsm = container_of(to_delayed_work(work),
+				struct otg_fsm, hnp_polling_work);
+	struct usb_device *udev;
+	enum usb_otg_state state = fsm->otg->state;
+	u8 flag;
+	int retval;
+
+	if (state != OTG_STATE_A_HOST && state != OTG_STATE_B_HOST)
+		return;
+
+	udev = usb_hub_find_child(fsm->otg->host->root_hub, 1);
+	if (!udev) {
+		dev_err(fsm->otg->host->controller,
+			"no usb dev connected, can't start HNP polling\n");
+		return;
+	}
+
+	*fsm->host_req_flag = 0;
+	/* Get host request flag from connected USB device */
+	retval = usb_control_msg(udev,
+				usb_rcvctrlpipe(udev, 0),
+				USB_REQ_GET_STATUS,
+				USB_DIR_IN | USB_RECIP_DEVICE,
+				0,
+				OTG_STS_SELECTOR,
+				fsm->host_req_flag,
+				1,
+				USB_CTRL_GET_TIMEOUT);
+	if (retval != 1) {
+		dev_err(&udev->dev, "Get one byte OTG status failed\n");
+		return;
+	}
+
+	flag = *fsm->host_req_flag;
+	if (flag == 0) {
+		/* Continue HNP polling */
+		schedule_delayed_work(&fsm->hnp_polling_work,
+					msecs_to_jiffies(T_HOST_REQ_POLL));
+		return;
+	} else if (flag != HOST_REQUEST_FLAG) {
+		dev_err(&udev->dev, "host request flag %d is invalid\n", flag);
+		return;
+	}
+
+	/* Host request flag is set */
+	if (state == OTG_STATE_A_HOST) {
+		/* Set b_hnp_enable */
+		if (!fsm->otg->host->b_hnp_enable) {
+			retval = usb_control_msg(udev,
+					usb_sndctrlpipe(udev, 0),
+					USB_REQ_SET_FEATURE, 0,
+					USB_DEVICE_B_HNP_ENABLE,
+					0, NULL, 0,
+					USB_CTRL_SET_TIMEOUT);
+			if (retval >= 0)
+				fsm->otg->host->b_hnp_enable = 1;
+		}
+		fsm->a_bus_req = 0;
+	} else if (state == OTG_STATE_B_HOST) {
+		fsm->b_bus_req = 0;
+	}
+
+	otg_statemachine(fsm);
+}
+
+static void otg_start_hnp_polling(struct otg_fsm *fsm)
+{
+	/*
+	 * The memory of host_req_flag should be allocated by
+	 * controller driver, otherwise, hnp polling is not started.
+	 */
+	if (!fsm->host_req_flag)
+		return;
+
+	if (!fsm->hnp_work_inited) {
+		INIT_DELAYED_WORK(&fsm->hnp_polling_work, otg_hnp_polling_work);
+		fsm->hnp_work_inited = true;
+	}
+
+	schedule_delayed_work(&fsm->hnp_polling_work,
+					msecs_to_jiffies(T_HOST_REQ_POLL));
+}
+
+/* Called when entering a state */
+static int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
+{
+	if (fsm->otg->state == new_state)
+		return 0;
+	VDBG("Set state: %s\n", usb_otg_state_string(new_state));
+	otg_leave_state(fsm, fsm->otg->state);
+	switch (new_state) {
+	case OTG_STATE_B_IDLE:
+		otg_drv_vbus(fsm, 0);
+		otg_chrg_vbus(fsm, 0);
+		otg_loc_conn(fsm, 0);
+		otg_loc_sof(fsm, 0);
+		/*
+		 * Driver is responsible for starting ADP probing
+		 * if ADP sensing times out.
+		 */
+		otg_start_adp_sns(fsm);
+		otg_set_protocol(fsm, PROTO_UNDEF);
+		otg_add_timer(fsm, B_SE0_SRP);
+		break;
+	case OTG_STATE_B_SRP_INIT:
+		otg_start_pulse(fsm);
+		otg_loc_sof(fsm, 0);
+		otg_set_protocol(fsm, PROTO_UNDEF);
+		otg_add_timer(fsm, B_SRP_FAIL);
+		break;
+	case OTG_STATE_B_PERIPHERAL:
+		otg_chrg_vbus(fsm, 0);
+		otg_loc_sof(fsm, 0);
+		otg_set_protocol(fsm, PROTO_GADGET);
+		otg_loc_conn(fsm, 1);
+		break;
+	case OTG_STATE_B_WAIT_ACON:
+		otg_chrg_vbus(fsm, 0);
+		otg_loc_conn(fsm, 0);
+		otg_loc_sof(fsm, 0);
+		otg_set_protocol(fsm, PROTO_HOST);
+		otg_add_timer(fsm, B_ASE0_BRST);
+		fsm->a_bus_suspend = 0;
+		break;
+	case OTG_STATE_B_HOST:
+		otg_chrg_vbus(fsm, 0);
+		otg_loc_conn(fsm, 0);
+		otg_loc_sof(fsm, 1);
+		otg_set_protocol(fsm, PROTO_HOST);
+		usb_bus_start_enum(fsm->otg->host,
+				fsm->otg->host->otg_port);
+		otg_start_hnp_polling(fsm);
+		break;
+	case OTG_STATE_A_IDLE:
+		otg_drv_vbus(fsm, 0);
+		otg_chrg_vbus(fsm, 0);
+		otg_loc_conn(fsm, 0);
+		otg_loc_sof(fsm, 0);
+		otg_start_adp_prb(fsm);
+		otg_set_protocol(fsm, PROTO_HOST);
+		break;
+	case OTG_STATE_A_WAIT_VRISE:
+		otg_drv_vbus(fsm, 1);
+		otg_loc_conn(fsm, 0);
+		otg_loc_sof(fsm, 0);
+		otg_set_protocol(fsm, PROTO_HOST);
+		otg_add_timer(fsm, A_WAIT_VRISE);
+		break;
+	case OTG_STATE_A_WAIT_BCON:
+		otg_drv_vbus(fsm, 1);
+		otg_loc_conn(fsm, 0);
+		otg_loc_sof(fsm, 0);
+		otg_set_protocol(fsm, PROTO_HOST);
+		otg_add_timer(fsm, A_WAIT_BCON);
+		break;
+	case OTG_STATE_A_HOST:
+		otg_drv_vbus(fsm, 1);
+		otg_loc_conn(fsm, 0);
+		otg_loc_sof(fsm, 1);
+		otg_set_protocol(fsm, PROTO_HOST);
+		/*
+		 * When HNP is triggered while a_bus_req = 0, a_host will
+		 * suspend too fast to complete a_set_b_hnp_en
+		 */
+		if (!fsm->a_bus_req || fsm->a_suspend_req_inf)
+			otg_add_timer(fsm, A_WAIT_ENUM);
+		otg_start_hnp_polling(fsm);
+		break;
+	case OTG_STATE_A_SUSPEND:
+		otg_drv_vbus(fsm, 1);
+		otg_loc_conn(fsm, 0);
+		otg_loc_sof(fsm, 0);
+		otg_set_protocol(fsm, PROTO_HOST);
+		otg_add_timer(fsm, A_AIDL_BDIS);
+
+		break;
+	case OTG_STATE_A_PERIPHERAL:
+		otg_loc_sof(fsm, 0);
+		otg_set_protocol(fsm, PROTO_GADGET);
+		otg_drv_vbus(fsm, 1);
+		otg_loc_conn(fsm, 1);
+		otg_add_timer(fsm, A_BIDL_ADIS);
+		break;
+	case OTG_STATE_A_WAIT_VFALL:
+		otg_drv_vbus(fsm, 0);
+		otg_loc_conn(fsm, 0);
+		otg_loc_sof(fsm, 0);
+		otg_set_protocol(fsm, PROTO_HOST);
+		otg_add_timer(fsm, A_WAIT_VFALL);
+		break;
+	case OTG_STATE_A_VBUS_ERR:
+		otg_drv_vbus(fsm, 0);
+		otg_loc_conn(fsm, 0);
+		otg_loc_sof(fsm, 0);
+		otg_set_protocol(fsm, PROTO_UNDEF);
+		break;
+	default:
+		break;
+	}
+
+	fsm->otg->state = new_state;
+	fsm->state_changed = 1;
+	return 0;
+}
+
+/* State change judgement */
+int otg_statemachine(struct otg_fsm *fsm)
+{
+	enum usb_otg_state state;
+
+	mutex_lock(&fsm->lock);
+
+	state = fsm->otg->state;
+	fsm->state_changed = 0;
+	/* State machine state change judgement */
+
+	switch (state) {
+	case OTG_STATE_UNDEFINED:
+		VDBG("fsm->id = %d\n", fsm->id);
+		if (fsm->id)
+			otg_set_state(fsm, OTG_STATE_B_IDLE);
+		else
+			otg_set_state(fsm, OTG_STATE_A_IDLE);
+		break;
+	case OTG_STATE_B_IDLE:
+		if (!fsm->id)
+			otg_set_state(fsm, OTG_STATE_A_IDLE);
+		else if (fsm->b_sess_vld && fsm->otg->gadget)
+			otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
+		else if ((fsm->b_bus_req || fsm->adp_change || fsm->power_up) &&
+				fsm->b_ssend_srp && fsm->b_se0_srp)
+			otg_set_state(fsm, OTG_STATE_B_SRP_INIT);
+		break;
+	case OTG_STATE_B_SRP_INIT:
+		if (!fsm->id || fsm->b_srp_done)
+			otg_set_state(fsm, OTG_STATE_B_IDLE);
+		break;
+	case OTG_STATE_B_PERIPHERAL:
+		if (!fsm->id || !fsm->b_sess_vld)
+			otg_set_state(fsm, OTG_STATE_B_IDLE);
+		else if (fsm->b_bus_req && fsm->otg->
+				gadget->b_hnp_enable && fsm->a_bus_suspend)
+			otg_set_state(fsm, OTG_STATE_B_WAIT_ACON);
+		break;
+	case OTG_STATE_B_WAIT_ACON:
+		if (fsm->a_conn)
+			otg_set_state(fsm, OTG_STATE_B_HOST);
+		else if (!fsm->id || !fsm->b_sess_vld)
+			otg_set_state(fsm, OTG_STATE_B_IDLE);
+		else if (fsm->a_bus_resume || fsm->b_ase0_brst_tmout) {
+			fsm->b_ase0_brst_tmout = 0;
+			otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
+		}
+		break;
+	case OTG_STATE_B_HOST:
+		if (!fsm->id || !fsm->b_sess_vld)
+			otg_set_state(fsm, OTG_STATE_B_IDLE);
+		else if (!fsm->b_bus_req || !fsm->a_conn || fsm->test_device)
+			otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
+		break;
+	case OTG_STATE_A_IDLE:
+		if (fsm->id)
+			otg_set_state(fsm, OTG_STATE_B_IDLE);
+		else if (!fsm->a_bus_drop && (fsm->a_bus_req ||
+			  fsm->a_srp_det || fsm->adp_change || fsm->power_up))
+			otg_set_state(fsm, OTG_STATE_A_WAIT_VRISE);
+		break;
+	case OTG_STATE_A_WAIT_VRISE:
+		if (fsm->a_vbus_vld)
+			otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+		else if (fsm->id || fsm->a_bus_drop ||
+				fsm->a_wait_vrise_tmout)
+			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+		break;
+	case OTG_STATE_A_WAIT_BCON:
+		if (!fsm->a_vbus_vld)
+			otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+		else if (fsm->b_conn)
+			otg_set_state(fsm, OTG_STATE_A_HOST);
+		else if (fsm->id || fsm->a_bus_drop || fsm->a_wait_bcon_tmout)
+			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+		break;
+	case OTG_STATE_A_HOST:
+		if (fsm->id || fsm->a_bus_drop)
+			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+		else if ((!fsm->a_bus_req || fsm->a_suspend_req_inf) &&
+				fsm->otg->host->b_hnp_enable)
+			otg_set_state(fsm, OTG_STATE_A_SUSPEND);
+		else if (!fsm->b_conn)
+			otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+		else if (!fsm->a_vbus_vld)
+			otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+		break;
+	case OTG_STATE_A_SUSPEND:
+		if (!fsm->b_conn && fsm->otg->host->b_hnp_enable)
+			otg_set_state(fsm, OTG_STATE_A_PERIPHERAL);
+		else if (!fsm->b_conn && !fsm->otg->host->b_hnp_enable)
+			otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+		else if (fsm->a_bus_req || fsm->b_bus_resume)
+			otg_set_state(fsm, OTG_STATE_A_HOST);
+		else if (fsm->id || fsm->a_bus_drop || fsm->a_aidl_bdis_tmout)
+			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+		else if (!fsm->a_vbus_vld)
+			otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+		break;
+	case OTG_STATE_A_PERIPHERAL:
+		if (fsm->id || fsm->a_bus_drop)
+			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+		else if (fsm->a_bidl_adis_tmout || fsm->b_bus_suspend)
+			otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+		else if (!fsm->a_vbus_vld)
+			otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+		break;
+	case OTG_STATE_A_WAIT_VFALL:
+		if (fsm->a_wait_vfall_tmout)
+			otg_set_state(fsm, OTG_STATE_A_IDLE);
+		break;
+	case OTG_STATE_A_VBUS_ERR:
+		if (fsm->id || fsm->a_bus_drop || fsm->a_clr_err)
+			otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+		break;
+	default:
+		break;
+	}
+	mutex_unlock(&fsm->lock);
+
+	VDBG("quit statemachine, changed = %d\n", fsm->state_changed);
+	return fsm->state_changed;
+}
+EXPORT_SYMBOL_GPL(otg_statemachine);
+MODULE_LICENSE("GPL");