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, 899 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw88/usb.c b/drivers/net/wireless/realtek/rtw88/usb.c
new file mode 100644
index 000000000..2a8336b18
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/usb.c
@@ -0,0 +1,899 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright(c) 2018-2019  Realtek Corporation
+ */
+
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/mutex.h>
+#include "main.h"
+#include "debug.h"
+#include "reg.h"
+#include "tx.h"
+#include "rx.h"
+#include "fw.h"
+#include "ps.h"
+#include "usb.h"
+
+#define RTW_USB_MAX_RXQ_LEN	512
+
+struct rtw_usb_txcb {
+	struct rtw_dev *rtwdev;
+	struct sk_buff_head tx_ack_queue;
+};
+
+static void rtw_usb_fill_tx_checksum(struct rtw_usb *rtwusb,
+				     struct sk_buff *skb, int agg_num)
+{
+	struct rtw_dev *rtwdev = rtwusb->rtwdev;
+	struct rtw_tx_pkt_info pkt_info;
+
+	SET_TX_DESC_DMA_TXAGG_NUM(skb->data, agg_num);
+	pkt_info.pkt_offset = GET_TX_DESC_PKT_OFFSET(skb->data);
+	rtw_tx_fill_txdesc_checksum(rtwdev, &pkt_info, skb->data);
+}
+
+static u32 rtw_usb_read(struct rtw_dev *rtwdev, u32 addr, u16 len)
+{
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+	struct usb_device *udev = rtwusb->udev;
+	__le32 *data;
+	unsigned long flags;
+	int idx, ret;
+	static int count;
+
+	spin_lock_irqsave(&rtwusb->usb_lock, flags);
+
+	idx = rtwusb->usb_data_index;
+	rtwusb->usb_data_index = (idx + 1) & (RTW_USB_MAX_RXTX_COUNT - 1);
+
+	spin_unlock_irqrestore(&rtwusb->usb_lock, flags);
+
+	data = &rtwusb->usb_data[idx];
+
+	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+			      RTW_USB_CMD_REQ, RTW_USB_CMD_READ, addr,
+			      RTW_USB_VENQT_CMD_IDX, data, len, 1000);
+	if (ret < 0 && ret != -ENODEV && count++ < 4)
+		rtw_err(rtwdev, "read register 0x%x failed with %d\n",
+			addr, ret);
+
+	return le32_to_cpu(*data);
+}
+
+static u8 rtw_usb_read8(struct rtw_dev *rtwdev, u32 addr)
+{
+	return (u8)rtw_usb_read(rtwdev, addr, 1);
+}
+
+static u16 rtw_usb_read16(struct rtw_dev *rtwdev, u32 addr)
+{
+	return (u16)rtw_usb_read(rtwdev, addr, 2);
+}
+
+static u32 rtw_usb_read32(struct rtw_dev *rtwdev, u32 addr)
+{
+	return (u32)rtw_usb_read(rtwdev, addr, 4);
+}
+
+static void rtw_usb_write(struct rtw_dev *rtwdev, u32 addr, u32 val, int len)
+{
+	struct rtw_usb *rtwusb = (struct rtw_usb *)rtwdev->priv;
+	struct usb_device *udev = rtwusb->udev;
+	unsigned long flags;
+	__le32 *data;
+	int idx, ret;
+	static int count;
+
+	spin_lock_irqsave(&rtwusb->usb_lock, flags);
+
+	idx = rtwusb->usb_data_index;
+	rtwusb->usb_data_index = (idx + 1) & (RTW_USB_MAX_RXTX_COUNT - 1);
+
+	spin_unlock_irqrestore(&rtwusb->usb_lock, flags);
+
+	data = &rtwusb->usb_data[idx];
+
+	*data = cpu_to_le32(val);
+
+	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+			      RTW_USB_CMD_REQ, RTW_USB_CMD_WRITE,
+			      addr, 0, data, len, 30000);
+	if (ret < 0 && ret != -ENODEV && count++ < 4)
+		rtw_err(rtwdev, "write register 0x%x failed with %d\n",
+			addr, ret);
+}
+
+static void rtw_usb_write8(struct rtw_dev *rtwdev, u32 addr, u8 val)
+{
+	rtw_usb_write(rtwdev, addr, val, 1);
+}
+
+static void rtw_usb_write16(struct rtw_dev *rtwdev, u32 addr, u16 val)
+{
+	rtw_usb_write(rtwdev, addr, val, 2);
+}
+
+static void rtw_usb_write32(struct rtw_dev *rtwdev, u32 addr, u32 val)
+{
+	rtw_usb_write(rtwdev, addr, val, 4);
+}
+
+static int rtw_usb_parse(struct rtw_dev *rtwdev,
+			 struct usb_interface *interface)
+{
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+	struct usb_host_interface *host_interface = &interface->altsetting[0];
+	struct usb_interface_descriptor *interface_desc = &host_interface->desc;
+	struct usb_endpoint_descriptor *endpoint;
+	struct usb_device *usbd = interface_to_usbdev(interface);
+	int num_out_pipes = 0;
+	int i;
+	u8 num;
+
+	for (i = 0; i < interface_desc->bNumEndpoints; i++) {
+		endpoint = &host_interface->endpoint[i].desc;
+		num = usb_endpoint_num(endpoint);
+
+		if (usb_endpoint_dir_in(endpoint) &&
+		    usb_endpoint_xfer_bulk(endpoint)) {
+			if (rtwusb->pipe_in) {
+				rtw_err(rtwdev, "IN pipes overflow\n");
+				return -EINVAL;
+			}
+
+			rtwusb->pipe_in = num;
+		}
+
+		if (usb_endpoint_dir_in(endpoint) &&
+		    usb_endpoint_xfer_int(endpoint)) {
+			if (rtwusb->pipe_interrupt) {
+				rtw_err(rtwdev, "INT pipes overflow\n");
+				return -EINVAL;
+			}
+
+			rtwusb->pipe_interrupt = num;
+		}
+
+		if (usb_endpoint_dir_out(endpoint) &&
+		    usb_endpoint_xfer_bulk(endpoint)) {
+			if (num_out_pipes >= ARRAY_SIZE(rtwusb->out_ep)) {
+				rtw_err(rtwdev, "OUT pipes overflow\n");
+				return -EINVAL;
+			}
+
+			rtwusb->out_ep[num_out_pipes++] = num;
+		}
+	}
+
+	switch (usbd->speed) {
+	case USB_SPEED_LOW:
+	case USB_SPEED_FULL:
+		rtwusb->bulkout_size = RTW_USB_FULL_SPEED_BULK_SIZE;
+		break;
+	case USB_SPEED_HIGH:
+		rtwusb->bulkout_size = RTW_USB_HIGH_SPEED_BULK_SIZE;
+		break;
+	case USB_SPEED_SUPER:
+		rtwusb->bulkout_size = RTW_USB_SUPER_SPEED_BULK_SIZE;
+		break;
+	default:
+		rtw_err(rtwdev, "failed to detect usb speed\n");
+		return -EINVAL;
+	}
+
+	rtwdev->hci.bulkout_num = num_out_pipes;
+
+	switch (num_out_pipes) {
+	case 4:
+	case 3:
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID0] = 2;
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID1] = 2;
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID2] = 2;
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID3] = 2;
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID4] = 1;
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID5] = 1;
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID6] = 0;
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID7] = 0;
+		break;
+	case 2:
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID0] = 1;
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID1] = 1;
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID2] = 1;
+		rtwusb->qsel_to_ep[TX_DESC_QSEL_TID3] = 1;
+		break;
+	case 1:
+		break;
+	default:
+		rtw_err(rtwdev, "failed to get out_pipes(%d)\n", num_out_pipes);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void rtw_usb_write_port_tx_complete(struct urb *urb)
+{
+	struct rtw_usb_txcb *txcb = urb->context;
+	struct rtw_dev *rtwdev = txcb->rtwdev;
+	struct ieee80211_hw *hw = rtwdev->hw;
+
+	while (true) {
+		struct sk_buff *skb = skb_dequeue(&txcb->tx_ack_queue);
+		struct ieee80211_tx_info *info;
+		struct rtw_usb_tx_data *tx_data;
+
+		if (!skb)
+			break;
+
+		info = IEEE80211_SKB_CB(skb);
+		tx_data = rtw_usb_get_tx_data(skb);
+
+		/* enqueue to wait for tx report */
+		if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) {
+			rtw_tx_report_enqueue(rtwdev, skb, tx_data->sn);
+			continue;
+		}
+
+		/* always ACK for others, then they won't be marked as drop */
+		ieee80211_tx_info_clear_status(info);
+		if (info->flags & IEEE80211_TX_CTL_NO_ACK)
+			info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
+		else
+			info->flags |= IEEE80211_TX_STAT_ACK;
+
+		ieee80211_tx_status_irqsafe(hw, skb);
+	}
+
+	kfree(txcb);
+}
+
+static int qsel_to_ep(struct rtw_usb *rtwusb, unsigned int qsel)
+{
+	if (qsel >= ARRAY_SIZE(rtwusb->qsel_to_ep))
+		return 0;
+
+	return rtwusb->qsel_to_ep[qsel];
+}
+
+static int rtw_usb_write_port(struct rtw_dev *rtwdev, u8 qsel, struct sk_buff *skb,
+			      usb_complete_t cb, void *context)
+{
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+	struct usb_device *usbd = rtwusb->udev;
+	struct urb *urb;
+	unsigned int pipe;
+	int ret;
+	int ep = qsel_to_ep(rtwusb, qsel);
+
+	pipe = usb_sndbulkpipe(usbd, rtwusb->out_ep[ep]);
+	urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (!urb)
+		return -ENOMEM;
+
+	usb_fill_bulk_urb(urb, usbd, pipe, skb->data, skb->len, cb, context);
+	urb->transfer_flags |= URB_ZERO_PACKET;
+	ret = usb_submit_urb(urb, GFP_ATOMIC);
+
+	usb_free_urb(urb);
+
+	return ret;
+}
+
+static bool rtw_usb_tx_agg_skb(struct rtw_usb *rtwusb, struct sk_buff_head *list)
+{
+	struct rtw_dev *rtwdev = rtwusb->rtwdev;
+	struct rtw_usb_txcb *txcb;
+	struct sk_buff *skb_head;
+	struct sk_buff *skb_iter;
+	int agg_num = 0;
+	unsigned int align_next = 0;
+
+	if (skb_queue_empty(list))
+		return false;
+
+	txcb = kmalloc(sizeof(*txcb), GFP_ATOMIC);
+	if (!txcb)
+		return false;
+
+	txcb->rtwdev = rtwdev;
+	skb_queue_head_init(&txcb->tx_ack_queue);
+
+	skb_iter = skb_dequeue(list);
+
+	if (skb_queue_empty(list)) {
+		skb_head = skb_iter;
+		goto queue;
+	}
+
+	skb_head = dev_alloc_skb(RTW_USB_MAX_XMITBUF_SZ);
+	if (!skb_head) {
+		skb_head = skb_iter;
+		goto queue;
+	}
+
+	while (skb_iter) {
+		unsigned long flags;
+
+		skb_put(skb_head, align_next);
+		skb_put_data(skb_head, skb_iter->data, skb_iter->len);
+
+		align_next = ALIGN(skb_iter->len, 8) - skb_iter->len;
+
+		agg_num++;
+
+		skb_queue_tail(&txcb->tx_ack_queue, skb_iter);
+
+		spin_lock_irqsave(&list->lock, flags);
+
+		skb_iter = skb_peek(list);
+
+		if (skb_iter && skb_iter->len + skb_head->len <= RTW_USB_MAX_XMITBUF_SZ)
+			__skb_unlink(skb_iter, list);
+		else
+			skb_iter = NULL;
+		spin_unlock_irqrestore(&list->lock, flags);
+	}
+
+	if (agg_num > 1)
+		rtw_usb_fill_tx_checksum(rtwusb, skb_head, agg_num);
+
+queue:
+	skb_queue_tail(&txcb->tx_ack_queue, skb_head);
+
+	rtw_usb_write_port(rtwdev, GET_TX_DESC_QSEL(skb_head->data), skb_head,
+			   rtw_usb_write_port_tx_complete, txcb);
+
+	return true;
+}
+
+static void rtw_usb_tx_handler(struct work_struct *work)
+{
+	struct rtw_usb *rtwusb = container_of(work, struct rtw_usb, tx_work);
+	int i, limit;
+
+	for (i = ARRAY_SIZE(rtwusb->tx_queue) - 1; i >= 0; i--) {
+		for (limit = 0; limit < 200; limit++) {
+			struct sk_buff_head *list = &rtwusb->tx_queue[i];
+
+			if (!rtw_usb_tx_agg_skb(rtwusb, list))
+				break;
+		}
+	}
+}
+
+static void rtw_usb_tx_queue_purge(struct rtw_usb *rtwusb)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(rtwusb->tx_queue); i++)
+		skb_queue_purge(&rtwusb->tx_queue[i]);
+}
+
+static void rtw_usb_write_port_complete(struct urb *urb)
+{
+	struct sk_buff *skb = urb->context;
+
+	dev_kfree_skb_any(skb);
+}
+
+static int rtw_usb_write_data(struct rtw_dev *rtwdev,
+			      struct rtw_tx_pkt_info *pkt_info,
+			      u8 *buf)
+{
+	const struct rtw_chip_info *chip = rtwdev->chip;
+	struct sk_buff *skb;
+	unsigned int desclen, headsize, size;
+	u8 qsel;
+	int ret = 0;
+
+	size = pkt_info->tx_pkt_size;
+	qsel = pkt_info->qsel;
+	desclen = chip->tx_pkt_desc_sz;
+	headsize = pkt_info->offset ? pkt_info->offset : desclen;
+
+	skb = dev_alloc_skb(headsize + size);
+	if (unlikely(!skb))
+		return -ENOMEM;
+
+	skb_reserve(skb, headsize);
+	skb_put_data(skb, buf, size);
+	skb_push(skb, headsize);
+	memset(skb->data, 0, headsize);
+	rtw_tx_fill_tx_desc(pkt_info, skb);
+	rtw_tx_fill_txdesc_checksum(rtwdev, pkt_info, skb->data);
+
+	ret = rtw_usb_write_port(rtwdev, qsel, skb,
+				 rtw_usb_write_port_complete, skb);
+	if (unlikely(ret))
+		rtw_err(rtwdev, "failed to do USB write, ret=%d\n", ret);
+
+	return ret;
+}
+
+static int rtw_usb_write_data_rsvd_page(struct rtw_dev *rtwdev, u8 *buf,
+					u32 size)
+{
+	const struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_tx_pkt_info pkt_info = {0};
+
+	pkt_info.tx_pkt_size = size;
+	pkt_info.qsel = TX_DESC_QSEL_BEACON;
+	pkt_info.offset = chip->tx_pkt_desc_sz;
+
+	return rtw_usb_write_data(rtwdev, &pkt_info, buf);
+}
+
+static int rtw_usb_write_data_h2c(struct rtw_dev *rtwdev, u8 *buf, u32 size)
+{
+	struct rtw_tx_pkt_info pkt_info = {0};
+
+	pkt_info.tx_pkt_size = size;
+	pkt_info.qsel = TX_DESC_QSEL_H2C;
+
+	return rtw_usb_write_data(rtwdev, &pkt_info, buf);
+}
+
+static u8 rtw_usb_tx_queue_mapping_to_qsel(struct sk_buff *skb)
+{
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+	__le16 fc = hdr->frame_control;
+	u8 qsel;
+
+	if (unlikely(ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc)))
+		qsel = TX_DESC_QSEL_MGMT;
+	else if (skb_get_queue_mapping(skb) <= IEEE80211_AC_BK)
+		qsel = skb->priority;
+	else
+		qsel = TX_DESC_QSEL_BEACON;
+
+	return qsel;
+}
+
+static int rtw_usb_tx_write(struct rtw_dev *rtwdev,
+			    struct rtw_tx_pkt_info *pkt_info,
+			    struct sk_buff *skb)
+{
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+	const struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_usb_tx_data *tx_data;
+	u8 *pkt_desc;
+	int ep;
+
+	pkt_info->qsel = rtw_usb_tx_queue_mapping_to_qsel(skb);
+	pkt_desc = skb_push(skb, chip->tx_pkt_desc_sz);
+	memset(pkt_desc, 0, chip->tx_pkt_desc_sz);
+	ep = qsel_to_ep(rtwusb, pkt_info->qsel);
+	rtw_tx_fill_tx_desc(pkt_info, skb);
+	rtw_tx_fill_txdesc_checksum(rtwdev, pkt_info, skb->data);
+	tx_data = rtw_usb_get_tx_data(skb);
+	tx_data->sn = pkt_info->sn;
+
+	skb_queue_tail(&rtwusb->tx_queue[ep], skb);
+
+	return 0;
+}
+
+static void rtw_usb_tx_kick_off(struct rtw_dev *rtwdev)
+{
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+
+	queue_work(rtwusb->txwq, &rtwusb->tx_work);
+}
+
+static void rtw_usb_rx_handler(struct work_struct *work)
+{
+	struct rtw_usb *rtwusb = container_of(work, struct rtw_usb, rx_work);
+	struct rtw_dev *rtwdev = rtwusb->rtwdev;
+	const struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_rx_pkt_stat pkt_stat;
+	struct ieee80211_rx_status rx_status;
+	struct sk_buff *skb;
+	u32 pkt_desc_sz = chip->rx_pkt_desc_sz;
+	u32 pkt_offset;
+	u8 *rx_desc;
+	int limit;
+
+	for (limit = 0; limit < 200; limit++) {
+		skb = skb_dequeue(&rtwusb->rx_queue);
+		if (!skb)
+			break;
+
+		rx_desc = skb->data;
+		chip->ops->query_rx_desc(rtwdev, rx_desc, &pkt_stat,
+					 &rx_status);
+		pkt_offset = pkt_desc_sz + pkt_stat.drv_info_sz +
+			     pkt_stat.shift;
+
+		if (pkt_stat.is_c2h) {
+			skb_put(skb, pkt_stat.pkt_len + pkt_offset);
+			rtw_fw_c2h_cmd_rx_irqsafe(rtwdev, pkt_offset, skb);
+			continue;
+		}
+
+		if (skb_queue_len(&rtwusb->rx_queue) >= RTW_USB_MAX_RXQ_LEN) {
+			rtw_err(rtwdev, "failed to get rx_queue, overflow\n");
+			dev_kfree_skb_any(skb);
+			continue;
+		}
+
+		skb_put(skb, pkt_stat.pkt_len);
+		skb_reserve(skb, pkt_offset);
+		memcpy(skb->cb, &rx_status, sizeof(rx_status));
+		ieee80211_rx_irqsafe(rtwdev->hw, skb);
+	}
+}
+
+static void rtw_usb_read_port_complete(struct urb *urb);
+
+static void rtw_usb_rx_resubmit(struct rtw_usb *rtwusb, struct rx_usb_ctrl_block *rxcb)
+{
+	struct rtw_dev *rtwdev = rtwusb->rtwdev;
+	int error;
+
+	rxcb->rx_skb = alloc_skb(RTW_USB_MAX_RECVBUF_SZ, GFP_ATOMIC);
+	if (!rxcb->rx_skb)
+		return;
+
+	usb_fill_bulk_urb(rxcb->rx_urb, rtwusb->udev,
+			  usb_rcvbulkpipe(rtwusb->udev, rtwusb->pipe_in),
+			  rxcb->rx_skb->data, RTW_USB_MAX_RECVBUF_SZ,
+			  rtw_usb_read_port_complete, rxcb);
+
+	error = usb_submit_urb(rxcb->rx_urb, GFP_ATOMIC);
+	if (error) {
+		kfree_skb(rxcb->rx_skb);
+		if (error != -ENODEV)
+			rtw_err(rtwdev, "Err sending rx data urb %d\n",
+				error);
+	}
+}
+
+static void rtw_usb_read_port_complete(struct urb *urb)
+{
+	struct rx_usb_ctrl_block *rxcb = urb->context;
+	struct rtw_dev *rtwdev = rxcb->rtwdev;
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+	struct sk_buff *skb = rxcb->rx_skb;
+
+	if (urb->status == 0) {
+		if (urb->actual_length >= RTW_USB_MAX_RECVBUF_SZ ||
+		    urb->actual_length < 24) {
+			rtw_err(rtwdev, "failed to get urb length:%d\n",
+				urb->actual_length);
+			if (skb)
+				dev_kfree_skb_any(skb);
+		} else {
+			skb_queue_tail(&rtwusb->rx_queue, skb);
+			queue_work(rtwusb->rxwq, &rtwusb->rx_work);
+		}
+		rtw_usb_rx_resubmit(rtwusb, rxcb);
+	} else {
+		switch (urb->status) {
+		case -EINVAL:
+		case -EPIPE:
+		case -ENODEV:
+		case -ESHUTDOWN:
+		case -ENOENT:
+		case -EPROTO:
+		case -EILSEQ:
+		case -ETIME:
+		case -ECOMM:
+		case -EOVERFLOW:
+		case -EINPROGRESS:
+			break;
+		default:
+			rtw_err(rtwdev, "status %d\n", urb->status);
+			break;
+		}
+		if (skb)
+			dev_kfree_skb_any(skb);
+	}
+}
+
+static void rtw_usb_cancel_rx_bufs(struct rtw_usb *rtwusb)
+{
+	struct rx_usb_ctrl_block *rxcb;
+	int i;
+
+	for (i = 0; i < RTW_USB_RXCB_NUM; i++) {
+		rxcb = &rtwusb->rx_cb[i];
+		if (rxcb->rx_urb)
+			usb_kill_urb(rxcb->rx_urb);
+	}
+}
+
+static void rtw_usb_free_rx_bufs(struct rtw_usb *rtwusb)
+{
+	struct rx_usb_ctrl_block *rxcb;
+	int i;
+
+	for (i = 0; i < RTW_USB_RXCB_NUM; i++) {
+		rxcb = &rtwusb->rx_cb[i];
+		if (rxcb->rx_urb) {
+			usb_kill_urb(rxcb->rx_urb);
+			usb_free_urb(rxcb->rx_urb);
+		}
+	}
+}
+
+static int rtw_usb_alloc_rx_bufs(struct rtw_usb *rtwusb)
+{
+	int i;
+
+	for (i = 0; i < RTW_USB_RXCB_NUM; i++) {
+		struct rx_usb_ctrl_block *rxcb = &rtwusb->rx_cb[i];
+
+		rxcb->n = i;
+		rxcb->rtwdev = rtwusb->rtwdev;
+		rxcb->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
+		if (!rxcb->rx_urb)
+			goto err;
+	}
+
+	return 0;
+err:
+	rtw_usb_free_rx_bufs(rtwusb);
+	return -ENOMEM;
+}
+
+static int rtw_usb_setup(struct rtw_dev *rtwdev)
+{
+	/* empty function for rtw_hci_ops */
+	return 0;
+}
+
+static int rtw_usb_start(struct rtw_dev *rtwdev)
+{
+	return 0;
+}
+
+static void rtw_usb_stop(struct rtw_dev *rtwdev)
+{
+}
+
+static void rtw_usb_deep_ps(struct rtw_dev *rtwdev, bool enter)
+{
+	/* empty function for rtw_hci_ops */
+}
+
+static void rtw_usb_link_ps(struct rtw_dev *rtwdev, bool enter)
+{
+	/* empty function for rtw_hci_ops */
+}
+
+static void rtw_usb_interface_cfg(struct rtw_dev *rtwdev)
+{
+	/* empty function for rtw_hci_ops */
+}
+
+static struct rtw_hci_ops rtw_usb_ops = {
+	.tx_write = rtw_usb_tx_write,
+	.tx_kick_off = rtw_usb_tx_kick_off,
+	.setup = rtw_usb_setup,
+	.start = rtw_usb_start,
+	.stop = rtw_usb_stop,
+	.deep_ps = rtw_usb_deep_ps,
+	.link_ps = rtw_usb_link_ps,
+	.interface_cfg = rtw_usb_interface_cfg,
+
+	.write8  = rtw_usb_write8,
+	.write16 = rtw_usb_write16,
+	.write32 = rtw_usb_write32,
+	.read8	= rtw_usb_read8,
+	.read16 = rtw_usb_read16,
+	.read32 = rtw_usb_read32,
+
+	.write_data_rsvd_page = rtw_usb_write_data_rsvd_page,
+	.write_data_h2c = rtw_usb_write_data_h2c,
+};
+
+static int rtw_usb_init_rx(struct rtw_dev *rtwdev)
+{
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+	int i;
+
+	rtwusb->rxwq = create_singlethread_workqueue("rtw88_usb: rx wq");
+	if (!rtwusb->rxwq) {
+		rtw_err(rtwdev, "failed to create RX work queue\n");
+		return -ENOMEM;
+	}
+
+	skb_queue_head_init(&rtwusb->rx_queue);
+
+	INIT_WORK(&rtwusb->rx_work, rtw_usb_rx_handler);
+
+	for (i = 0; i < RTW_USB_RXCB_NUM; i++) {
+		struct rx_usb_ctrl_block *rxcb = &rtwusb->rx_cb[i];
+
+		rtw_usb_rx_resubmit(rtwusb, rxcb);
+	}
+
+	return 0;
+}
+
+static void rtw_usb_deinit_rx(struct rtw_dev *rtwdev)
+{
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+
+	skb_queue_purge(&rtwusb->rx_queue);
+
+	flush_workqueue(rtwusb->rxwq);
+	destroy_workqueue(rtwusb->rxwq);
+}
+
+static int rtw_usb_init_tx(struct rtw_dev *rtwdev)
+{
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+	int i;
+
+	rtwusb->txwq = create_singlethread_workqueue("rtw88_usb: tx wq");
+	if (!rtwusb->txwq) {
+		rtw_err(rtwdev, "failed to create TX work queue\n");
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(rtwusb->tx_queue); i++)
+		skb_queue_head_init(&rtwusb->tx_queue[i]);
+
+	INIT_WORK(&rtwusb->tx_work, rtw_usb_tx_handler);
+
+	return 0;
+}
+
+static void rtw_usb_deinit_tx(struct rtw_dev *rtwdev)
+{
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+
+	rtw_usb_tx_queue_purge(rtwusb);
+	flush_workqueue(rtwusb->txwq);
+	destroy_workqueue(rtwusb->txwq);
+}
+
+static int rtw_usb_intf_init(struct rtw_dev *rtwdev,
+			     struct usb_interface *intf)
+{
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+	struct usb_device *udev = usb_get_dev(interface_to_usbdev(intf));
+	int ret;
+
+	rtwusb->udev = udev;
+	ret = rtw_usb_parse(rtwdev, intf);
+	if (ret)
+		return ret;
+
+	rtwusb->usb_data = kcalloc(RTW_USB_MAX_RXTX_COUNT, sizeof(u32),
+				   GFP_KERNEL);
+	if (!rtwusb->usb_data)
+		return -ENOMEM;
+
+	usb_set_intfdata(intf, rtwdev->hw);
+
+	SET_IEEE80211_DEV(rtwdev->hw, &intf->dev);
+	spin_lock_init(&rtwusb->usb_lock);
+
+	return 0;
+}
+
+static void rtw_usb_intf_deinit(struct rtw_dev *rtwdev,
+				struct usb_interface *intf)
+{
+	struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
+
+	usb_put_dev(rtwusb->udev);
+	usb_set_intfdata(intf, NULL);
+}
+
+int rtw_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+	struct rtw_dev *rtwdev;
+	struct ieee80211_hw *hw;
+	struct rtw_usb *rtwusb;
+	int drv_data_size;
+	int ret;
+
+	drv_data_size = sizeof(struct rtw_dev) + sizeof(struct rtw_usb);
+	hw = ieee80211_alloc_hw(drv_data_size, &rtw_ops);
+	if (!hw)
+		return -ENOMEM;
+
+	rtwdev = hw->priv;
+	rtwdev->hw = hw;
+	rtwdev->dev = &intf->dev;
+	rtwdev->chip = (struct rtw_chip_info *)id->driver_info;
+	rtwdev->hci.ops = &rtw_usb_ops;
+	rtwdev->hci.type = RTW_HCI_TYPE_USB;
+
+	rtwusb = rtw_get_usb_priv(rtwdev);
+	rtwusb->rtwdev = rtwdev;
+
+	ret = rtw_usb_alloc_rx_bufs(rtwusb);
+	if (ret)
+		return ret;
+
+	ret = rtw_core_init(rtwdev);
+	if (ret)
+		goto err_release_hw;
+
+	ret = rtw_usb_intf_init(rtwdev, intf);
+	if (ret) {
+		rtw_err(rtwdev, "failed to init USB interface\n");
+		goto err_deinit_core;
+	}
+
+	ret = rtw_usb_init_tx(rtwdev);
+	if (ret) {
+		rtw_err(rtwdev, "failed to init USB TX\n");
+		goto err_destroy_usb;
+	}
+
+	ret = rtw_usb_init_rx(rtwdev);
+	if (ret) {
+		rtw_err(rtwdev, "failed to init USB RX\n");
+		goto err_destroy_txwq;
+	}
+
+	ret = rtw_chip_info_setup(rtwdev);
+	if (ret) {
+		rtw_err(rtwdev, "failed to setup chip information\n");
+		goto err_destroy_rxwq;
+	}
+
+	ret = rtw_register_hw(rtwdev, rtwdev->hw);
+	if (ret) {
+		rtw_err(rtwdev, "failed to register hw\n");
+		goto err_destroy_rxwq;
+	}
+
+	return 0;
+
+err_destroy_rxwq:
+	rtw_usb_deinit_rx(rtwdev);
+
+err_destroy_txwq:
+	rtw_usb_deinit_tx(rtwdev);
+
+err_destroy_usb:
+	rtw_usb_intf_deinit(rtwdev, intf);
+
+err_deinit_core:
+	rtw_core_deinit(rtwdev);
+
+err_release_hw:
+	ieee80211_free_hw(hw);
+
+	return ret;
+}
+EXPORT_SYMBOL(rtw_usb_probe);
+
+void rtw_usb_disconnect(struct usb_interface *intf)
+{
+	struct ieee80211_hw *hw = usb_get_intfdata(intf);
+	struct rtw_dev *rtwdev;
+	struct rtw_usb *rtwusb;
+
+	if (!hw)
+		return;
+
+	rtwdev = hw->priv;
+	rtwusb = rtw_get_usb_priv(rtwdev);
+
+	rtw_usb_cancel_rx_bufs(rtwusb);
+
+	rtw_unregister_hw(rtwdev, hw);
+	rtw_usb_deinit_tx(rtwdev);
+	rtw_usb_deinit_rx(rtwdev);
+
+	if (rtwusb->udev->state != USB_STATE_NOTATTACHED)
+		usb_reset_device(rtwusb->udev);
+
+	rtw_usb_free_rx_bufs(rtwusb);
+
+	rtw_usb_intf_deinit(rtwdev, intf);
+	rtw_core_deinit(rtwdev);
+	ieee80211_free_hw(hw);
+}
+EXPORT_SYMBOL(rtw_usb_disconnect);
+
+MODULE_AUTHOR("Realtek Corporation");
+MODULE_DESCRIPTION("Realtek 802.11ac wireless USB driver");
+MODULE_LICENSE("Dual BSD/GPL");