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, 489 insertions, 0 deletions

diff --git a/drivers/usb/cdns3/cdnsp-ep0.c b/drivers/usb/cdns3/cdnsp-ep0.c
new file mode 100644
index 000000000..9b8325f82
--- /dev/null
+++ b/drivers/usb/cdns3/cdnsp-ep0.c
@@ -0,0 +1,489 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence CDNSP DRD Driver.
+ *
+ * Copyright (C) 2020 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ *
+ */
+
+#include <linux/usb/composite.h>
+#include <linux/usb/gadget.h>
+#include <linux/list.h>
+
+#include "cdnsp-gadget.h"
+#include "cdnsp-trace.h"
+
+static void cdnsp_ep0_stall(struct cdnsp_device *pdev)
+{
+	struct cdnsp_request *preq;
+	struct cdnsp_ep *pep;
+
+	pep = &pdev->eps[0];
+	preq = next_request(&pep->pending_list);
+
+	if (pdev->three_stage_setup) {
+		cdnsp_halt_endpoint(pdev, pep, true);
+
+		if (preq)
+			cdnsp_gadget_giveback(pep, preq, -ECONNRESET);
+	} else {
+		pep->ep_state |= EP0_HALTED_STATUS;
+
+		if (preq)
+			list_del(&preq->list);
+
+		cdnsp_status_stage(pdev);
+	}
+}
+
+static int cdnsp_ep0_delegate_req(struct cdnsp_device *pdev,
+				  struct usb_ctrlrequest *ctrl)
+{
+	int ret;
+
+	spin_unlock(&pdev->lock);
+	ret = pdev->gadget_driver->setup(&pdev->gadget, ctrl);
+	spin_lock(&pdev->lock);
+
+	return ret;
+}
+
+static int cdnsp_ep0_set_config(struct cdnsp_device *pdev,
+				struct usb_ctrlrequest *ctrl)
+{
+	enum usb_device_state state = pdev->gadget.state;
+	u32 cfg;
+	int ret;
+
+	cfg = le16_to_cpu(ctrl->wValue);
+
+	switch (state) {
+	case USB_STATE_ADDRESS:
+		trace_cdnsp_ep0_set_config("from Address state");
+		break;
+	case USB_STATE_CONFIGURED:
+		trace_cdnsp_ep0_set_config("from Configured state");
+		break;
+	default:
+		dev_err(pdev->dev, "Set Configuration - bad device state\n");
+		return -EINVAL;
+	}
+
+	ret = cdnsp_ep0_delegate_req(pdev, ctrl);
+	if (ret)
+		return ret;
+
+	if (!cfg)
+		usb_gadget_set_state(&pdev->gadget, USB_STATE_ADDRESS);
+
+	return 0;
+}
+
+static int cdnsp_ep0_set_address(struct cdnsp_device *pdev,
+				 struct usb_ctrlrequest *ctrl)
+{
+	enum usb_device_state state = pdev->gadget.state;
+	struct cdnsp_slot_ctx *slot_ctx;
+	unsigned int slot_state;
+	int ret;
+	u32 addr;
+
+	addr = le16_to_cpu(ctrl->wValue);
+
+	if (addr > 127) {
+		dev_err(pdev->dev, "Invalid device address %d\n", addr);
+		return -EINVAL;
+	}
+
+	slot_ctx = cdnsp_get_slot_ctx(&pdev->out_ctx);
+
+	if (state == USB_STATE_CONFIGURED) {
+		dev_err(pdev->dev, "Can't Set Address from Configured State\n");
+		return -EINVAL;
+	}
+
+	pdev->device_address = le16_to_cpu(ctrl->wValue);
+
+	slot_ctx = cdnsp_get_slot_ctx(&pdev->out_ctx);
+	slot_state = GET_SLOT_STATE(le32_to_cpu(slot_ctx->dev_state));
+	if (slot_state == SLOT_STATE_ADDRESSED)
+		cdnsp_reset_device(pdev);
+
+	/*set device address*/
+	ret = cdnsp_setup_device(pdev, SETUP_CONTEXT_ADDRESS);
+	if (ret)
+		return ret;
+
+	if (addr)
+		usb_gadget_set_state(&pdev->gadget, USB_STATE_ADDRESS);
+	else
+		usb_gadget_set_state(&pdev->gadget, USB_STATE_DEFAULT);
+
+	return 0;
+}
+
+int cdnsp_status_stage(struct cdnsp_device *pdev)
+{
+	pdev->ep0_stage = CDNSP_STATUS_STAGE;
+	pdev->ep0_preq.request.length = 0;
+
+	return cdnsp_ep_enqueue(pdev->ep0_preq.pep, &pdev->ep0_preq);
+}
+
+static int cdnsp_w_index_to_ep_index(u16 wIndex)
+{
+	if (!(wIndex & USB_ENDPOINT_NUMBER_MASK))
+		return 0;
+
+	return ((wIndex & USB_ENDPOINT_NUMBER_MASK) * 2) +
+		(wIndex & USB_ENDPOINT_DIR_MASK ? 1 : 0) - 1;
+}
+
+static int cdnsp_ep0_handle_status(struct cdnsp_device *pdev,
+				   struct usb_ctrlrequest *ctrl)
+{
+	struct cdnsp_ep *pep;
+	__le16 *response;
+	int ep_sts = 0;
+	u16 status = 0;
+	u32 recipient;
+
+	recipient = ctrl->bRequestType & USB_RECIP_MASK;
+
+	switch (recipient) {
+	case USB_RECIP_DEVICE:
+		status = pdev->gadget.is_selfpowered;
+		status |= pdev->may_wakeup << USB_DEVICE_REMOTE_WAKEUP;
+
+		if (pdev->gadget.speed >= USB_SPEED_SUPER) {
+			status |= pdev->u1_allowed << USB_DEV_STAT_U1_ENABLED;
+			status |= pdev->u2_allowed << USB_DEV_STAT_U2_ENABLED;
+		}
+		break;
+	case USB_RECIP_INTERFACE:
+		/*
+		 * Function Remote Wake Capable	D0
+		 * Function Remote Wakeup	D1
+		 */
+		return cdnsp_ep0_delegate_req(pdev, ctrl);
+	case USB_RECIP_ENDPOINT:
+		ep_sts = cdnsp_w_index_to_ep_index(le16_to_cpu(ctrl->wIndex));
+		pep = &pdev->eps[ep_sts];
+		ep_sts = GET_EP_CTX_STATE(pep->out_ctx);
+
+		/* check if endpoint is stalled */
+		if (ep_sts == EP_STATE_HALTED)
+			status =  BIT(USB_ENDPOINT_HALT);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	response = (__le16 *)pdev->setup_buf;
+	*response = cpu_to_le16(status);
+
+	pdev->ep0_preq.request.length = sizeof(*response);
+	pdev->ep0_preq.request.buf = pdev->setup_buf;
+
+	return cdnsp_ep_enqueue(pdev->ep0_preq.pep, &pdev->ep0_preq);
+}
+
+static void cdnsp_enter_test_mode(struct cdnsp_device *pdev)
+{
+	u32 temp;
+
+	temp = readl(&pdev->active_port->regs->portpmsc) & ~GENMASK(31, 28);
+	temp |= PORT_TEST_MODE(pdev->test_mode);
+	writel(temp, &pdev->active_port->regs->portpmsc);
+}
+
+static int cdnsp_ep0_handle_feature_device(struct cdnsp_device *pdev,
+					   struct usb_ctrlrequest *ctrl,
+					   int set)
+{
+	enum usb_device_state state;
+	enum usb_device_speed speed;
+	u16 tmode;
+
+	state = pdev->gadget.state;
+	speed = pdev->gadget.speed;
+
+	switch (le16_to_cpu(ctrl->wValue)) {
+	case USB_DEVICE_REMOTE_WAKEUP:
+		pdev->may_wakeup = !!set;
+		trace_cdnsp_may_wakeup(set);
+		break;
+	case USB_DEVICE_U1_ENABLE:
+		if (state != USB_STATE_CONFIGURED || speed < USB_SPEED_SUPER)
+			return -EINVAL;
+
+		pdev->u1_allowed = !!set;
+		trace_cdnsp_u1(set);
+		break;
+	case USB_DEVICE_U2_ENABLE:
+		if (state != USB_STATE_CONFIGURED || speed < USB_SPEED_SUPER)
+			return -EINVAL;
+
+		pdev->u2_allowed = !!set;
+		trace_cdnsp_u2(set);
+		break;
+	case USB_DEVICE_LTM_ENABLE:
+		return -EINVAL;
+	case USB_DEVICE_TEST_MODE:
+		if (state != USB_STATE_CONFIGURED || speed > USB_SPEED_HIGH)
+			return -EINVAL;
+
+		tmode = le16_to_cpu(ctrl->wIndex);
+
+		if (!set || (tmode & 0xff) != 0)
+			return -EINVAL;
+
+		tmode = tmode >> 8;
+
+		if (tmode > USB_TEST_FORCE_ENABLE || tmode < USB_TEST_J)
+			return -EINVAL;
+
+		pdev->test_mode = tmode;
+
+		/*
+		 * Test mode must be set before Status Stage but controller
+		 * will start testing sequence after Status Stage.
+		 */
+		cdnsp_enter_test_mode(pdev);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int cdnsp_ep0_handle_feature_intf(struct cdnsp_device *pdev,
+					 struct usb_ctrlrequest *ctrl,
+					 int set)
+{
+	u16 wValue, wIndex;
+	int ret;
+
+	wValue = le16_to_cpu(ctrl->wValue);
+	wIndex = le16_to_cpu(ctrl->wIndex);
+
+	switch (wValue) {
+	case USB_INTRF_FUNC_SUSPEND:
+		ret = cdnsp_ep0_delegate_req(pdev, ctrl);
+		if (ret)
+			return ret;
+
+		/*
+		 * Remote wakeup is enabled when any function within a device
+		 * is enabled for function remote wakeup.
+		 */
+		if (wIndex & USB_INTRF_FUNC_SUSPEND_RW)
+			pdev->may_wakeup++;
+		else
+			if (pdev->may_wakeup > 0)
+				pdev->may_wakeup--;
+
+		return 0;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int cdnsp_ep0_handle_feature_endpoint(struct cdnsp_device *pdev,
+					     struct usb_ctrlrequest *ctrl,
+					     int set)
+{
+	struct cdnsp_ep *pep;
+	u16 wValue;
+
+	wValue = le16_to_cpu(ctrl->wValue);
+	pep = &pdev->eps[cdnsp_w_index_to_ep_index(le16_to_cpu(ctrl->wIndex))];
+
+	switch (wValue) {
+	case USB_ENDPOINT_HALT:
+		if (!set && (pep->ep_state & EP_WEDGE)) {
+			/* Resets Sequence Number */
+			cdnsp_halt_endpoint(pdev, pep, 0);
+			cdnsp_halt_endpoint(pdev, pep, 1);
+			break;
+		}
+
+		return cdnsp_halt_endpoint(pdev, pep, set);
+	default:
+		dev_warn(pdev->dev, "WARN Incorrect wValue %04x\n", wValue);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int cdnsp_ep0_handle_feature(struct cdnsp_device *pdev,
+				    struct usb_ctrlrequest *ctrl,
+				    int set)
+{
+	switch (ctrl->bRequestType & USB_RECIP_MASK) {
+	case USB_RECIP_DEVICE:
+		return cdnsp_ep0_handle_feature_device(pdev, ctrl, set);
+	case USB_RECIP_INTERFACE:
+		return cdnsp_ep0_handle_feature_intf(pdev, ctrl, set);
+	case USB_RECIP_ENDPOINT:
+		return cdnsp_ep0_handle_feature_endpoint(pdev, ctrl, set);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int cdnsp_ep0_set_sel(struct cdnsp_device *pdev,
+			     struct usb_ctrlrequest *ctrl)
+{
+	enum usb_device_state state = pdev->gadget.state;
+	u16 wLength;
+
+	if (state == USB_STATE_DEFAULT)
+		return -EINVAL;
+
+	wLength = le16_to_cpu(ctrl->wLength);
+
+	if (wLength != 6) {
+		dev_err(pdev->dev, "Set SEL should be 6 bytes, got %d\n",
+			wLength);
+		return -EINVAL;
+	}
+
+	/*
+	 * To handle Set SEL we need to receive 6 bytes from Host. So let's
+	 * queue a usb_request for 6 bytes.
+	 */
+	pdev->ep0_preq.request.length = 6;
+	pdev->ep0_preq.request.buf = pdev->setup_buf;
+
+	return cdnsp_ep_enqueue(pdev->ep0_preq.pep, &pdev->ep0_preq);
+}
+
+static int cdnsp_ep0_set_isoch_delay(struct cdnsp_device *pdev,
+				     struct usb_ctrlrequest *ctrl)
+{
+	if (le16_to_cpu(ctrl->wIndex) || le16_to_cpu(ctrl->wLength))
+		return -EINVAL;
+
+	pdev->gadget.isoch_delay = le16_to_cpu(ctrl->wValue);
+
+	return 0;
+}
+
+static int cdnsp_ep0_std_request(struct cdnsp_device *pdev,
+				 struct usb_ctrlrequest *ctrl)
+{
+	int ret;
+
+	switch (ctrl->bRequest) {
+	case USB_REQ_GET_STATUS:
+		ret = cdnsp_ep0_handle_status(pdev, ctrl);
+		break;
+	case USB_REQ_CLEAR_FEATURE:
+		ret = cdnsp_ep0_handle_feature(pdev, ctrl, 0);
+		break;
+	case USB_REQ_SET_FEATURE:
+		ret = cdnsp_ep0_handle_feature(pdev, ctrl, 1);
+		break;
+	case USB_REQ_SET_ADDRESS:
+		ret = cdnsp_ep0_set_address(pdev, ctrl);
+		break;
+	case USB_REQ_SET_CONFIGURATION:
+		ret = cdnsp_ep0_set_config(pdev, ctrl);
+		break;
+	case USB_REQ_SET_SEL:
+		ret = cdnsp_ep0_set_sel(pdev, ctrl);
+		break;
+	case USB_REQ_SET_ISOCH_DELAY:
+		ret = cdnsp_ep0_set_isoch_delay(pdev, ctrl);
+		break;
+	case USB_REQ_SET_INTERFACE:
+		/*
+		 * Add request into pending list to block sending status stage
+		 * by libcomposite.
+		 */
+		list_add_tail(&pdev->ep0_preq.list,
+			      &pdev->ep0_preq.pep->pending_list);
+
+		ret = cdnsp_ep0_delegate_req(pdev, ctrl);
+		if (ret == -EBUSY)
+			ret = 0;
+
+		list_del(&pdev->ep0_preq.list);
+		break;
+	default:
+		ret = cdnsp_ep0_delegate_req(pdev, ctrl);
+		break;
+	}
+
+	return ret;
+}
+
+void cdnsp_setup_analyze(struct cdnsp_device *pdev)
+{
+	struct usb_ctrlrequest *ctrl = &pdev->setup;
+	int ret = 0;
+	u16 len;
+
+	trace_cdnsp_ctrl_req(ctrl);
+
+	if (!pdev->gadget_driver)
+		goto out;
+
+	if (pdev->gadget.state == USB_STATE_NOTATTACHED) {
+		dev_err(pdev->dev, "ERR: Setup detected in unattached state\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/* Restore the ep0 to Stopped/Running state. */
+	if (pdev->eps[0].ep_state & EP_HALTED) {
+		trace_cdnsp_ep0_halted("Restore to normal state");
+		cdnsp_halt_endpoint(pdev, &pdev->eps[0], 0);
+	}
+
+	/*
+	 * Finishing previous SETUP transfer by removing request from
+	 * list and informing upper layer
+	 */
+	if (!list_empty(&pdev->eps[0].pending_list)) {
+		struct cdnsp_request	*req;
+
+		trace_cdnsp_ep0_request("Remove previous");
+		req = next_request(&pdev->eps[0].pending_list);
+		cdnsp_ep_dequeue(&pdev->eps[0], req);
+	}
+
+	len = le16_to_cpu(ctrl->wLength);
+	if (!len) {
+		pdev->three_stage_setup = false;
+		pdev->ep0_expect_in = false;
+	} else {
+		pdev->three_stage_setup = true;
+		pdev->ep0_expect_in = !!(ctrl->bRequestType & USB_DIR_IN);
+	}
+
+	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
+		ret = cdnsp_ep0_std_request(pdev, ctrl);
+	else
+		ret = cdnsp_ep0_delegate_req(pdev, ctrl);
+
+	if (!len)
+		pdev->ep0_stage = CDNSP_STATUS_STAGE;
+
+	if (ret == USB_GADGET_DELAYED_STATUS) {
+		trace_cdnsp_ep0_status_stage("delayed");
+		return;
+	}
+out:
+	if (ret < 0)
+		cdnsp_ep0_stall(pdev);
+	else if (pdev->ep0_stage == CDNSP_STATUS_STAGE)
+		cdnsp_status_stage(pdev);
+}