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, 336 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-cp2615.c b/drivers/i2c/busses/i2c-cp2615.c
new file mode 100644
index 000000000..3ded28632
--- /dev/null
+++ b/drivers/i2c/busses/i2c-cp2615.c
@@ -0,0 +1,336 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * i2c support for Silicon Labs' CP2615 Digital Audio Bridge
+ *
+ * (c) 2021, Bence Csókás <bence98@sch.bme.hu>
+ */
+
+#include <linux/errno.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/usb.h>
+
+/** CP2615 I/O Protocol implementation */
+
+#define CP2615_VID 0x10c4
+#define CP2615_PID 0xeac1
+
+#define IOP_EP_IN  0x82
+#define IOP_EP_OUT 0x02
+#define IOP_IFN 1
+#define IOP_ALTSETTING 2
+
+#define MAX_IOP_SIZE 64
+#define MAX_IOP_PAYLOAD_SIZE (MAX_IOP_SIZE - 6)
+#define MAX_I2C_SIZE (MAX_IOP_PAYLOAD_SIZE - 4)
+
+enum cp2615_iop_msg_type {
+	iop_GetAccessoryInfo = 0xD100,
+	iop_AccessoryInfo = 0xA100,
+	iop_GetPortConfiguration = 0xD203,
+	iop_PortConfiguration = 0xA203,
+	iop_DoI2cTransfer = 0xD400,
+	iop_I2cTransferResult = 0xA400,
+	iop_GetSerialState = 0xD501,
+	iop_SerialState = 0xA501
+};
+
+struct __packed cp2615_iop_msg {
+	__be16 preamble, length, msg;
+	u8 data[MAX_IOP_PAYLOAD_SIZE];
+};
+
+#define PART_ID_A01 0x1400
+#define PART_ID_A02 0x1500
+
+struct __packed cp2615_iop_accessory_info {
+	__be16 part_id, option_id, proto_ver;
+};
+
+struct __packed cp2615_i2c_transfer {
+	u8 tag, i2caddr, read_len, write_len;
+	u8 data[MAX_I2C_SIZE];
+};
+
+/* Possible values for struct cp2615_i2c_transfer_result.status */
+enum cp2615_i2c_status {
+	/* Writing to the internal EEPROM failed, because it is locked */
+	CP2615_CFG_LOCKED = -6,
+	/* read_len or write_len out of range */
+	CP2615_INVALID_PARAM = -4,
+	/* I2C slave did not ACK in time */
+	CP2615_TIMEOUT,
+	/* I2C bus busy */
+	CP2615_BUS_BUSY,
+	/* I2C bus error (ie. device NAK'd the request) */
+	CP2615_BUS_ERROR,
+	CP2615_SUCCESS
+};
+
+struct __packed cp2615_i2c_transfer_result {
+	u8 tag, i2caddr;
+	s8 status;
+	u8 read_len;
+	u8 data[MAX_I2C_SIZE];
+};
+
+static int cp2615_init_iop_msg(struct cp2615_iop_msg *ret, enum cp2615_iop_msg_type msg,
+			const void *data, size_t data_len)
+{
+	if (data_len > MAX_IOP_PAYLOAD_SIZE)
+		return -EFBIG;
+
+	if (!ret)
+		return -EINVAL;
+
+	ret->preamble = 0x2A2A;
+	ret->length = htons(data_len + 6);
+	ret->msg = htons(msg);
+	if (data && data_len)
+		memcpy(&ret->data, data, data_len);
+	return 0;
+}
+
+static int cp2615_init_i2c_msg(struct cp2615_iop_msg *ret, const struct cp2615_i2c_transfer *data)
+{
+	return cp2615_init_iop_msg(ret, iop_DoI2cTransfer, data, 4 + data->write_len);
+}
+
+/* Translates status codes to Linux errno's */
+static int cp2615_check_status(enum cp2615_i2c_status status)
+{
+	switch (status) {
+	case CP2615_SUCCESS:
+			return 0;
+	case CP2615_BUS_ERROR:
+		return -ENXIO;
+	case CP2615_BUS_BUSY:
+		return -EAGAIN;
+	case CP2615_TIMEOUT:
+		return -ETIMEDOUT;
+	case CP2615_INVALID_PARAM:
+		return -EINVAL;
+	case CP2615_CFG_LOCKED:
+		return -EPERM;
+	}
+	/* Unknown error code */
+	return -EPROTO;
+}
+
+/** Driver code */
+
+static int
+cp2615_i2c_send(struct usb_interface *usbif, struct cp2615_i2c_transfer *i2c_w)
+{
+	struct cp2615_iop_msg *msg = kzalloc(sizeof(*msg), GFP_KERNEL);
+	struct usb_device *usbdev = interface_to_usbdev(usbif);
+	int res = cp2615_init_i2c_msg(msg, i2c_w);
+
+	if (!res)
+		res = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, IOP_EP_OUT),
+				   msg, ntohs(msg->length), NULL, 0);
+	kfree(msg);
+	return res;
+}
+
+static int
+cp2615_i2c_recv(struct usb_interface *usbif, unsigned char tag, void *buf)
+{
+	struct usb_device *usbdev = interface_to_usbdev(usbif);
+	struct cp2615_iop_msg *msg;
+	struct cp2615_i2c_transfer_result *i2c_r;
+	int res;
+
+	msg = kzalloc(sizeof(*msg), GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	res = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, IOP_EP_IN), msg,
+			   sizeof(struct cp2615_iop_msg), NULL, 0);
+	if (res < 0) {
+		kfree(msg);
+		return res;
+	}
+
+	i2c_r = (struct cp2615_i2c_transfer_result *)&msg->data;
+	if (msg->msg != htons(iop_I2cTransferResult) || i2c_r->tag != tag) {
+		kfree(msg);
+		return -EIO;
+	}
+
+	res = cp2615_check_status(i2c_r->status);
+	if (!res)
+		memcpy(buf, &i2c_r->data, i2c_r->read_len);
+
+	kfree(msg);
+	return res;
+}
+
+/* Checks if the IOP is functional by querying the part's ID */
+static int cp2615_check_iop(struct usb_interface *usbif)
+{
+	struct cp2615_iop_msg *msg = kzalloc(sizeof(*msg), GFP_KERNEL);
+	struct cp2615_iop_accessory_info *info = (struct cp2615_iop_accessory_info *)&msg->data;
+	struct usb_device *usbdev = interface_to_usbdev(usbif);
+	int res = cp2615_init_iop_msg(msg, iop_GetAccessoryInfo, NULL, 0);
+
+	if (res)
+		goto out;
+
+	res = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, IOP_EP_OUT),
+				   msg, ntohs(msg->length), NULL, 0);
+	if (res)
+		goto out;
+
+	res = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, IOP_EP_IN),
+			       msg, sizeof(struct cp2615_iop_msg), NULL, 0);
+	if (res)
+		goto out;
+
+	if (msg->msg != htons(iop_AccessoryInfo)) {
+		res = -EIO;
+		goto out;
+	}
+
+	switch (ntohs(info->part_id)) {
+	case PART_ID_A01:
+		dev_dbg(&usbif->dev, "Found A01 part. (WARNING: errata exists!)\n");
+		break;
+	case PART_ID_A02:
+		dev_dbg(&usbif->dev, "Found good A02 part.\n");
+		break;
+	default:
+		dev_warn(&usbif->dev, "Unknown part ID %04X\n", ntohs(info->part_id));
+	}
+
+out:
+	kfree(msg);
+	return res;
+}
+
+static int
+cp2615_i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
+{
+	struct usb_interface *usbif = adap->algo_data;
+	int i = 0, ret = 0;
+	struct i2c_msg *msg;
+	struct cp2615_i2c_transfer i2c_w = {0};
+
+	dev_dbg(&usbif->dev, "Doing %d I2C transactions\n", num);
+
+	for (; !ret && i < num; i++) {
+		msg = &msgs[i];
+
+		i2c_w.tag = 0xdd;
+		i2c_w.i2caddr = i2c_8bit_addr_from_msg(msg);
+		if (msg->flags & I2C_M_RD) {
+			i2c_w.read_len = msg->len;
+			i2c_w.write_len = 0;
+		} else {
+			i2c_w.read_len = 0;
+			i2c_w.write_len = msg->len;
+			memcpy(&i2c_w.data, msg->buf, i2c_w.write_len);
+		}
+		ret = cp2615_i2c_send(usbif, &i2c_w);
+		if (ret)
+			break;
+		ret = cp2615_i2c_recv(usbif, i2c_w.tag, msg->buf);
+	}
+	if (ret < 0)
+		return ret;
+	return i;
+}
+
+static u32
+cp2615_i2c_func(struct i2c_adapter *adap)
+{
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm cp2615_i2c_algo = {
+	.master_xfer	= cp2615_i2c_master_xfer,
+	.functionality	= cp2615_i2c_func,
+};
+
+/*
+ * This chip has some limitations: one is that the USB endpoint
+ * can only receive 64 bytes/transfer, that leaves 54 bytes for
+ * the I2C transfer. On top of that, EITHER read_len OR write_len
+ * may be zero, but not both. If both are non-zero, the adapter
+ * issues a write followed by a read. And the chip does not
+ * support repeated START between the write and read phases.
+ */
+static struct i2c_adapter_quirks cp2615_i2c_quirks = {
+	.max_write_len = MAX_I2C_SIZE,
+	.max_read_len = MAX_I2C_SIZE,
+	.flags = I2C_AQ_COMB_WRITE_THEN_READ | I2C_AQ_NO_ZERO_LEN | I2C_AQ_NO_REP_START,
+	.max_comb_1st_msg_len = MAX_I2C_SIZE,
+	.max_comb_2nd_msg_len = MAX_I2C_SIZE
+};
+
+static void
+cp2615_i2c_remove(struct usb_interface *usbif)
+{
+	struct i2c_adapter *adap = usb_get_intfdata(usbif);
+
+	usb_set_intfdata(usbif, NULL);
+	i2c_del_adapter(adap);
+}
+
+static int
+cp2615_i2c_probe(struct usb_interface *usbif, const struct usb_device_id *id)
+{
+	int ret = 0;
+	struct i2c_adapter *adap;
+	struct usb_device *usbdev = interface_to_usbdev(usbif);
+
+	ret = usb_set_interface(usbdev, IOP_IFN, IOP_ALTSETTING);
+	if (ret)
+		return ret;
+
+	ret = cp2615_check_iop(usbif);
+	if (ret)
+		return ret;
+
+	adap = devm_kzalloc(&usbif->dev, sizeof(struct i2c_adapter), GFP_KERNEL);
+	if (!adap)
+		return -ENOMEM;
+
+	strncpy(adap->name, usbdev->serial, sizeof(adap->name) - 1);
+	adap->owner = THIS_MODULE;
+	adap->dev.parent = &usbif->dev;
+	adap->dev.of_node = usbif->dev.of_node;
+	adap->timeout = HZ;
+	adap->algo = &cp2615_i2c_algo;
+	adap->quirks = &cp2615_i2c_quirks;
+	adap->algo_data = usbif;
+
+	ret = i2c_add_adapter(adap);
+	if (ret)
+		return ret;
+
+	usb_set_intfdata(usbif, adap);
+	return 0;
+}
+
+static const struct usb_device_id id_table[] = {
+	{ USB_DEVICE_INTERFACE_NUMBER(CP2615_VID, CP2615_PID, IOP_IFN) },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(usb, id_table);
+
+static struct usb_driver cp2615_i2c_driver = {
+	.name = "i2c-cp2615",
+	.probe = cp2615_i2c_probe,
+	.disconnect = cp2615_i2c_remove,
+	.id_table = id_table,
+};
+
+module_usb_driver(cp2615_i2c_driver);
+
+MODULE_AUTHOR("Bence Csókás <bence98@sch.bme.hu>");
+MODULE_DESCRIPTION("CP2615 I2C bus driver");
+MODULE_LICENSE("GPL");