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, 516 insertions, 0 deletions

diff --git a/drivers/net/wwan/t7xx/t7xx_netdev.c b/drivers/net/wwan/t7xx/t7xx_netdev.c
new file mode 100644
index 000000000..3ef4a8a4f
--- /dev/null
+++ b/drivers/net/wwan/t7xx/t7xx_netdev.c
@@ -0,0 +1,516 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2021, MediaTek Inc.
+ * Copyright (c) 2021-2022, Intel Corporation.
+ *
+ * Authors:
+ *  Chandrashekar Devegowda <chandrashekar.devegowda@intel.com>
+ *  Haijun Liu <haijun.liu@mediatek.com>
+ *  Ricardo Martinez <ricardo.martinez@linux.intel.com>
+ *
+ * Contributors:
+ *  Amir Hanania <amir.hanania@intel.com>
+ *  Andy Shevchenko <andriy.shevchenko@linux.intel.com>
+ *  Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com>
+ *  Eliot Lee <eliot.lee@intel.com>
+ *  Moises Veleta <moises.veleta@intel.com>
+ *  Sreehari Kancharla <sreehari.kancharla@intel.com>
+ */
+
+#include <linux/atomic.h>
+#include <linux/device.h>
+#include <linux/gfp.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/ip.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/netdev_features.h>
+#include <linux/netdevice.h>
+#include <linux/pm_runtime.h>
+#include <linux/skbuff.h>
+#include <linux/types.h>
+#include <linux/wwan.h>
+#include <net/ipv6.h>
+#include <net/pkt_sched.h>
+
+#include "t7xx_hif_dpmaif_rx.h"
+#include "t7xx_hif_dpmaif_tx.h"
+#include "t7xx_netdev.h"
+#include "t7xx_pci.h"
+#include "t7xx_port_proxy.h"
+#include "t7xx_state_monitor.h"
+
+#define IP_MUX_SESSION_DEFAULT	0
+#define SBD_PACKET_TYPE_MASK	GENMASK(7, 4)
+
+static void t7xx_ccmni_enable_napi(struct t7xx_ccmni_ctrl *ctlb)
+{
+	struct dpmaif_ctrl *ctrl;
+	int i, ret;
+
+	ctrl =  ctlb->hif_ctrl;
+
+	if (ctlb->is_napi_en)
+		return;
+
+	for (i = 0; i < RXQ_NUM; i++) {
+		/* The usage count has to be bumped every time before calling
+		 * napi_schedule. It will be decresed in the poll routine,
+		 * right after napi_complete_done is called.
+		 */
+		ret = pm_runtime_resume_and_get(ctrl->dev);
+		if (ret < 0) {
+			dev_err(ctrl->dev, "Failed to resume device: %d\n",
+				ret);
+			return;
+		}
+		napi_enable(ctlb->napi[i]);
+		napi_schedule(ctlb->napi[i]);
+	}
+	ctlb->is_napi_en = true;
+}
+
+static void t7xx_ccmni_disable_napi(struct t7xx_ccmni_ctrl *ctlb)
+{
+	int i;
+
+	if (!ctlb->is_napi_en)
+		return;
+
+	for (i = 0; i < RXQ_NUM; i++) {
+		napi_synchronize(ctlb->napi[i]);
+		napi_disable(ctlb->napi[i]);
+	}
+
+	ctlb->is_napi_en = false;
+}
+
+static int t7xx_ccmni_open(struct net_device *dev)
+{
+	struct t7xx_ccmni *ccmni = wwan_netdev_drvpriv(dev);
+	struct t7xx_ccmni_ctrl *ccmni_ctl = ccmni->ctlb;
+
+	netif_carrier_on(dev);
+	netif_tx_start_all_queues(dev);
+	if (!atomic_fetch_inc(&ccmni_ctl->napi_usr_refcnt))
+		t7xx_ccmni_enable_napi(ccmni_ctl);
+
+	atomic_inc(&ccmni->usage);
+	return 0;
+}
+
+static int t7xx_ccmni_close(struct net_device *dev)
+{
+	struct t7xx_ccmni *ccmni = wwan_netdev_drvpriv(dev);
+	struct t7xx_ccmni_ctrl *ccmni_ctl = ccmni->ctlb;
+
+	atomic_dec(&ccmni->usage);
+	if (atomic_dec_and_test(&ccmni_ctl->napi_usr_refcnt))
+		t7xx_ccmni_disable_napi(ccmni_ctl);
+
+	netif_carrier_off(dev);
+	netif_tx_disable(dev);
+	return 0;
+}
+
+static int t7xx_ccmni_send_packet(struct t7xx_ccmni *ccmni, struct sk_buff *skb,
+				  unsigned int txq_number)
+{
+	struct t7xx_ccmni_ctrl *ctlb = ccmni->ctlb;
+	struct t7xx_skb_cb *skb_cb = T7XX_SKB_CB(skb);
+
+	skb_cb->netif_idx = ccmni->index;
+
+	if (t7xx_dpmaif_tx_send_skb(ctlb->hif_ctrl, txq_number, skb))
+		return NETDEV_TX_BUSY;
+
+	return 0;
+}
+
+static netdev_tx_t t7xx_ccmni_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct t7xx_ccmni *ccmni = wwan_netdev_drvpriv(dev);
+	int skb_len = skb->len;
+
+	/* If MTU is changed or there is no headroom, drop the packet */
+	if (skb->len > dev->mtu || skb_headroom(skb) < sizeof(struct ccci_header)) {
+		dev_kfree_skb(skb);
+		dev->stats.tx_dropped++;
+		return NETDEV_TX_OK;
+	}
+
+	if (t7xx_ccmni_send_packet(ccmni, skb, DPMAIF_TX_DEFAULT_QUEUE))
+		return NETDEV_TX_BUSY;
+
+	dev->stats.tx_packets++;
+	dev->stats.tx_bytes += skb_len;
+
+	return NETDEV_TX_OK;
+}
+
+static void t7xx_ccmni_tx_timeout(struct net_device *dev, unsigned int __always_unused txqueue)
+{
+	struct t7xx_ccmni *ccmni = netdev_priv(dev);
+
+	dev->stats.tx_errors++;
+
+	if (atomic_read(&ccmni->usage) > 0)
+		netif_tx_wake_all_queues(dev);
+}
+
+static const struct net_device_ops ccmni_netdev_ops = {
+	.ndo_open	  = t7xx_ccmni_open,
+	.ndo_stop	  = t7xx_ccmni_close,
+	.ndo_start_xmit   = t7xx_ccmni_start_xmit,
+	.ndo_tx_timeout   = t7xx_ccmni_tx_timeout,
+};
+
+static void t7xx_ccmni_start(struct t7xx_ccmni_ctrl *ctlb)
+{
+	struct t7xx_ccmni *ccmni;
+	int i;
+
+	for (i = 0; i < ctlb->nic_dev_num; i++) {
+		ccmni = ctlb->ccmni_inst[i];
+		if (!ccmni)
+			continue;
+
+		if (atomic_read(&ccmni->usage) > 0) {
+			netif_tx_start_all_queues(ccmni->dev);
+			netif_carrier_on(ccmni->dev);
+		}
+	}
+
+	if (atomic_read(&ctlb->napi_usr_refcnt))
+		t7xx_ccmni_enable_napi(ctlb);
+}
+
+static void t7xx_ccmni_pre_stop(struct t7xx_ccmni_ctrl *ctlb)
+{
+	struct t7xx_ccmni *ccmni;
+	int i;
+
+	for (i = 0; i < ctlb->nic_dev_num; i++) {
+		ccmni = ctlb->ccmni_inst[i];
+		if (!ccmni)
+			continue;
+
+		if (atomic_read(&ccmni->usage) > 0)
+			netif_tx_disable(ccmni->dev);
+	}
+}
+
+static void t7xx_ccmni_post_stop(struct t7xx_ccmni_ctrl *ctlb)
+{
+	struct t7xx_ccmni *ccmni;
+	int i;
+
+	if (atomic_read(&ctlb->napi_usr_refcnt))
+		t7xx_ccmni_disable_napi(ctlb);
+
+	for (i = 0; i < ctlb->nic_dev_num; i++) {
+		ccmni = ctlb->ccmni_inst[i];
+		if (!ccmni)
+			continue;
+
+		if (atomic_read(&ccmni->usage) > 0)
+			netif_carrier_off(ccmni->dev);
+	}
+}
+
+static void t7xx_ccmni_wwan_setup(struct net_device *dev)
+{
+	dev->needed_headroom += sizeof(struct ccci_header);
+
+	dev->mtu = ETH_DATA_LEN;
+	dev->max_mtu = CCMNI_MTU_MAX;
+	BUILD_BUG_ON(CCMNI_MTU_MAX > DPMAIF_HW_MTU_SIZE);
+
+	dev->tx_queue_len = DEFAULT_TX_QUEUE_LEN;
+	dev->watchdog_timeo = CCMNI_NETDEV_WDT_TO;
+
+	dev->flags = IFF_POINTOPOINT | IFF_NOARP;
+
+	dev->features = NETIF_F_VLAN_CHALLENGED;
+
+	dev->features |= NETIF_F_SG;
+	dev->hw_features |= NETIF_F_SG;
+
+	dev->features |= NETIF_F_HW_CSUM;
+	dev->hw_features |= NETIF_F_HW_CSUM;
+
+	dev->features |= NETIF_F_RXCSUM;
+	dev->hw_features |= NETIF_F_RXCSUM;
+
+	dev->features |= NETIF_F_GRO;
+	dev->hw_features |= NETIF_F_GRO;
+
+	dev->needs_free_netdev = true;
+
+	dev->type = ARPHRD_NONE;
+
+	dev->netdev_ops = &ccmni_netdev_ops;
+}
+
+static void t7xx_init_netdev_napi(struct t7xx_ccmni_ctrl *ctlb)
+{
+	int i;
+
+	/* one HW, but shared with multiple net devices,
+	 * so add a dummy device for NAPI.
+	 */
+	init_dummy_netdev(&ctlb->dummy_dev);
+	atomic_set(&ctlb->napi_usr_refcnt, 0);
+	ctlb->is_napi_en = false;
+
+	for (i = 0; i < RXQ_NUM; i++) {
+		ctlb->napi[i] = &ctlb->hif_ctrl->rxq[i].napi;
+		netif_napi_add_weight(&ctlb->dummy_dev, ctlb->napi[i], t7xx_dpmaif_napi_rx_poll,
+				      NIC_NAPI_POLL_BUDGET);
+	}
+}
+
+static void t7xx_uninit_netdev_napi(struct t7xx_ccmni_ctrl *ctlb)
+{
+	int i;
+
+	for (i = 0; i < RXQ_NUM; i++) {
+		netif_napi_del(ctlb->napi[i]);
+		ctlb->napi[i] = NULL;
+	}
+}
+
+static int t7xx_ccmni_wwan_newlink(void *ctxt, struct net_device *dev, u32 if_id,
+				   struct netlink_ext_ack *extack)
+{
+	struct t7xx_ccmni_ctrl *ctlb = ctxt;
+	struct t7xx_ccmni *ccmni;
+	int ret;
+
+	if (if_id >= ARRAY_SIZE(ctlb->ccmni_inst))
+		return -EINVAL;
+
+	ccmni = wwan_netdev_drvpriv(dev);
+	ccmni->index = if_id;
+	ccmni->ctlb = ctlb;
+	ccmni->dev = dev;
+	atomic_set(&ccmni->usage, 0);
+	ctlb->ccmni_inst[if_id] = ccmni;
+
+	ret = register_netdevice(dev);
+	if (ret)
+		return ret;
+
+	netif_device_attach(dev);
+	return 0;
+}
+
+static void t7xx_ccmni_wwan_dellink(void *ctxt, struct net_device *dev, struct list_head *head)
+{
+	struct t7xx_ccmni *ccmni = wwan_netdev_drvpriv(dev);
+	struct t7xx_ccmni_ctrl *ctlb = ctxt;
+	u8 if_id = ccmni->index;
+
+	if (if_id >= ARRAY_SIZE(ctlb->ccmni_inst))
+		return;
+
+	if (WARN_ON(ctlb->ccmni_inst[if_id] != ccmni))
+		return;
+
+	unregister_netdevice(dev);
+}
+
+static const struct wwan_ops ccmni_wwan_ops = {
+	.priv_size = sizeof(struct t7xx_ccmni),
+	.setup     = t7xx_ccmni_wwan_setup,
+	.newlink   = t7xx_ccmni_wwan_newlink,
+	.dellink   = t7xx_ccmni_wwan_dellink,
+};
+
+static int t7xx_ccmni_register_wwan(struct t7xx_ccmni_ctrl *ctlb)
+{
+	struct device *dev = ctlb->hif_ctrl->dev;
+	int ret;
+
+	if (ctlb->wwan_is_registered)
+		return 0;
+
+	/* WWAN core will create a netdev for the default IP MUX channel */
+	ret = wwan_register_ops(dev, &ccmni_wwan_ops, ctlb, IP_MUX_SESSION_DEFAULT);
+	if (ret < 0) {
+		dev_err(dev, "Unable to register WWAN ops, %d\n", ret);
+		return ret;
+	}
+
+	ctlb->wwan_is_registered = true;
+	return 0;
+}
+
+static int t7xx_ccmni_md_state_callback(enum md_state state, void *para)
+{
+	struct t7xx_ccmni_ctrl *ctlb = para;
+	struct device *dev;
+	int ret = 0;
+
+	dev = ctlb->hif_ctrl->dev;
+	ctlb->md_sta = state;
+
+	switch (state) {
+	case MD_STATE_READY:
+		ret = t7xx_ccmni_register_wwan(ctlb);
+		if (!ret)
+			t7xx_ccmni_start(ctlb);
+		break;
+
+	case MD_STATE_EXCEPTION:
+	case MD_STATE_STOPPED:
+		t7xx_ccmni_pre_stop(ctlb);
+
+		ret = t7xx_dpmaif_md_state_callback(ctlb->hif_ctrl, state);
+		if (ret < 0)
+			dev_err(dev, "DPMAIF md state callback err, state=%d\n", state);
+
+		t7xx_ccmni_post_stop(ctlb);
+		break;
+
+	case MD_STATE_WAITING_FOR_HS1:
+	case MD_STATE_WAITING_TO_STOP:
+		ret = t7xx_dpmaif_md_state_callback(ctlb->hif_ctrl, state);
+		if (ret < 0)
+			dev_err(dev, "DPMAIF md state callback err, state=%d\n", state);
+
+		break;
+
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+static void init_md_status_notifier(struct t7xx_pci_dev *t7xx_dev)
+{
+	struct t7xx_ccmni_ctrl	*ctlb = t7xx_dev->ccmni_ctlb;
+	struct t7xx_fsm_notifier *md_status_notifier;
+
+	md_status_notifier = &ctlb->md_status_notify;
+	INIT_LIST_HEAD(&md_status_notifier->entry);
+	md_status_notifier->notifier_fn = t7xx_ccmni_md_state_callback;
+	md_status_notifier->data = ctlb;
+
+	t7xx_fsm_notifier_register(t7xx_dev->md, md_status_notifier);
+}
+
+static void t7xx_ccmni_recv_skb(struct t7xx_ccmni_ctrl *ccmni_ctlb, struct sk_buff *skb,
+				struct napi_struct *napi)
+{
+	struct t7xx_skb_cb *skb_cb;
+	struct net_device *net_dev;
+	struct t7xx_ccmni *ccmni;
+	int pkt_type, skb_len;
+	u8 netif_id;
+
+	skb_cb = T7XX_SKB_CB(skb);
+	netif_id = skb_cb->netif_idx;
+	ccmni = ccmni_ctlb->ccmni_inst[netif_id];
+	if (!ccmni) {
+		dev_kfree_skb(skb);
+		return;
+	}
+
+	net_dev = ccmni->dev;
+	pkt_type = skb_cb->rx_pkt_type;
+	skb->dev = net_dev;
+	if (pkt_type == PKT_TYPE_IP6)
+		skb->protocol = htons(ETH_P_IPV6);
+	else
+		skb->protocol = htons(ETH_P_IP);
+
+	skb_len = skb->len;
+	napi_gro_receive(napi, skb);
+	net_dev->stats.rx_packets++;
+	net_dev->stats.rx_bytes += skb_len;
+}
+
+static void t7xx_ccmni_queue_tx_irq_notify(struct t7xx_ccmni_ctrl *ctlb, int qno)
+{
+	struct t7xx_ccmni *ccmni = ctlb->ccmni_inst[0];
+	struct netdev_queue *net_queue;
+
+	if (netif_running(ccmni->dev) && atomic_read(&ccmni->usage) > 0) {
+		net_queue = netdev_get_tx_queue(ccmni->dev, qno);
+		if (netif_tx_queue_stopped(net_queue))
+			netif_tx_wake_queue(net_queue);
+	}
+}
+
+static void t7xx_ccmni_queue_tx_full_notify(struct t7xx_ccmni_ctrl *ctlb, int qno)
+{
+	struct t7xx_ccmni *ccmni = ctlb->ccmni_inst[0];
+	struct netdev_queue *net_queue;
+
+	if (atomic_read(&ccmni->usage) > 0) {
+		netdev_err(ccmni->dev, "TX queue %d is full\n", qno);
+		net_queue = netdev_get_tx_queue(ccmni->dev, qno);
+		netif_tx_stop_queue(net_queue);
+	}
+}
+
+static void t7xx_ccmni_queue_state_notify(struct t7xx_pci_dev *t7xx_dev,
+					  enum dpmaif_txq_state state, int qno)
+{
+	struct t7xx_ccmni_ctrl *ctlb = t7xx_dev->ccmni_ctlb;
+
+	if (ctlb->md_sta != MD_STATE_READY)
+		return;
+
+	if (!ctlb->ccmni_inst[0]) {
+		dev_warn(&t7xx_dev->pdev->dev, "No netdev registered yet\n");
+		return;
+	}
+
+	if (state == DMPAIF_TXQ_STATE_IRQ)
+		t7xx_ccmni_queue_tx_irq_notify(ctlb, qno);
+	else if (state == DMPAIF_TXQ_STATE_FULL)
+		t7xx_ccmni_queue_tx_full_notify(ctlb, qno);
+}
+
+int t7xx_ccmni_init(struct t7xx_pci_dev *t7xx_dev)
+{
+	struct device *dev = &t7xx_dev->pdev->dev;
+	struct t7xx_ccmni_ctrl *ctlb;
+
+	ctlb = devm_kzalloc(dev, sizeof(*ctlb), GFP_KERNEL);
+	if (!ctlb)
+		return -ENOMEM;
+
+	t7xx_dev->ccmni_ctlb = ctlb;
+	ctlb->t7xx_dev = t7xx_dev;
+	ctlb->callbacks.state_notify = t7xx_ccmni_queue_state_notify;
+	ctlb->callbacks.recv_skb = t7xx_ccmni_recv_skb;
+	ctlb->nic_dev_num = NIC_DEV_DEFAULT;
+
+	ctlb->hif_ctrl = t7xx_dpmaif_hif_init(t7xx_dev, &ctlb->callbacks);
+	if (!ctlb->hif_ctrl)
+		return -ENOMEM;
+
+	t7xx_init_netdev_napi(ctlb);
+	init_md_status_notifier(t7xx_dev);
+	return 0;
+}
+
+void t7xx_ccmni_exit(struct t7xx_pci_dev *t7xx_dev)
+{
+	struct t7xx_ccmni_ctrl *ctlb = t7xx_dev->ccmni_ctlb;
+
+	t7xx_fsm_notifier_unregister(t7xx_dev->md, &ctlb->md_status_notify);
+
+	if (ctlb->wwan_is_registered) {
+		wwan_unregister_ops(&t7xx_dev->pdev->dev);
+		ctlb->wwan_is_registered = false;
+	}
+
+	t7xx_uninit_netdev_napi(ctlb);
+	t7xx_dpmaif_hif_exit(ctlb->hif_ctrl);
+}