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, 374 insertions, 0 deletions

diff --git a/sound/drivers/serial-generic.c b/sound/drivers/serial-generic.c
new file mode 100644
index 000000000..e1f864dc7
--- /dev/null
+++ b/sound/drivers/serial-generic.c
@@ -0,0 +1,374 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *   serial-generic.c
+ *   Copyright (c) by Daniel Kaehn <kaehndan@gmail.com
+ *   Based on serial-u16550.c by Jaroslav Kysela <perex@perex.cz>,
+ *		                 Isaku Yamahata <yamahata@private.email.ne.jp>,
+ *		                 George Hansper <ghansper@apana.org.au>,
+ *		                 Hannu Savolainen
+ *
+ * Generic serial MIDI driver using the serdev serial bus API for hardware interaction
+ */
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/serdev.h>
+#include <linux/serial_reg.h>
+#include <linux/slab.h>
+#include <linux/dev_printk.h>
+
+#include <sound/core.h>
+#include <sound/rawmidi.h>
+#include <sound/initval.h>
+
+MODULE_DESCRIPTION("Generic serial MIDI driver");
+MODULE_LICENSE("GPL");
+
+#define SERIAL_MODE_INPUT_OPEN		1
+#define SERIAL_MODE_OUTPUT_OPEN	2
+#define SERIAL_MODE_INPUT_TRIGGERED	3
+#define SERIAL_MODE_OUTPUT_TRIGGERED	4
+
+#define SERIAL_TX_STATE_ACTIVE	1
+#define SERIAL_TX_STATE_WAKEUP	2
+
+struct snd_serial_generic {
+	struct serdev_device *serdev;
+
+	struct snd_card *card;
+	struct snd_rawmidi *rmidi;
+	struct snd_rawmidi_substream *midi_output;
+	struct snd_rawmidi_substream *midi_input;
+
+	unsigned int baudrate;
+
+	unsigned long filemode;		/* open status of file */
+	struct work_struct tx_work;
+	unsigned long tx_state;
+
+};
+
+static void snd_serial_generic_tx_wakeup(struct snd_serial_generic *drvdata)
+{
+	if (test_and_set_bit(SERIAL_TX_STATE_ACTIVE, &drvdata->tx_state))
+		set_bit(SERIAL_TX_STATE_WAKEUP, &drvdata->tx_state);
+
+	schedule_work(&drvdata->tx_work);
+}
+
+#define INTERNAL_BUF_SIZE 256
+
+static void snd_serial_generic_tx_work(struct work_struct *work)
+{
+	static char buf[INTERNAL_BUF_SIZE];
+	int num_bytes;
+	struct snd_serial_generic *drvdata = container_of(work, struct snd_serial_generic,
+						   tx_work);
+	struct snd_rawmidi_substream *substream = drvdata->midi_output;
+
+	clear_bit(SERIAL_TX_STATE_WAKEUP, &drvdata->tx_state);
+
+	while (!snd_rawmidi_transmit_empty(substream)) {
+
+		if (!test_bit(SERIAL_MODE_OUTPUT_OPEN, &drvdata->filemode))
+			break;
+
+		num_bytes = snd_rawmidi_transmit_peek(substream, buf, INTERNAL_BUF_SIZE);
+		num_bytes = serdev_device_write_buf(drvdata->serdev, buf, num_bytes);
+
+		if (!num_bytes)
+			break;
+
+		snd_rawmidi_transmit_ack(substream, num_bytes);
+
+		if (!test_bit(SERIAL_TX_STATE_WAKEUP, &drvdata->tx_state))
+			break;
+	}
+
+	clear_bit(SERIAL_TX_STATE_ACTIVE, &drvdata->tx_state);
+}
+
+static void snd_serial_generic_write_wakeup(struct serdev_device *serdev)
+{
+	struct snd_serial_generic *drvdata = serdev_device_get_drvdata(serdev);
+
+	snd_serial_generic_tx_wakeup(drvdata);
+}
+
+static int snd_serial_generic_receive_buf(struct serdev_device *serdev,
+				const unsigned char *buf, size_t count)
+{
+	int ret;
+	struct snd_serial_generic *drvdata = serdev_device_get_drvdata(serdev);
+
+	if (!test_bit(SERIAL_MODE_INPUT_OPEN, &drvdata->filemode))
+		return 0;
+
+	ret = snd_rawmidi_receive(drvdata->midi_input, buf, count);
+	return ret < 0 ? 0 : ret;
+}
+
+static const struct serdev_device_ops snd_serial_generic_serdev_device_ops = {
+	.receive_buf = snd_serial_generic_receive_buf,
+	.write_wakeup = snd_serial_generic_write_wakeup
+};
+
+static int snd_serial_generic_ensure_serdev_open(struct snd_serial_generic *drvdata)
+{
+	int err;
+	unsigned int actual_baud;
+
+	if (drvdata->filemode)
+		return 0;
+
+	dev_dbg(drvdata->card->dev, "Opening serial port for card %s\n",
+		drvdata->card->shortname);
+	err = serdev_device_open(drvdata->serdev);
+	if (err < 0)
+		return err;
+
+	actual_baud = serdev_device_set_baudrate(drvdata->serdev,
+		drvdata->baudrate);
+	if (actual_baud != drvdata->baudrate) {
+		dev_warn(drvdata->card->dev, "requested %d baud for card %s but it was actually set to %d\n",
+			drvdata->baudrate, drvdata->card->shortname, actual_baud);
+	}
+
+	return 0;
+}
+
+static int snd_serial_generic_input_open(struct snd_rawmidi_substream *substream)
+{
+	int err;
+	struct snd_serial_generic *drvdata = substream->rmidi->card->private_data;
+
+	dev_dbg(drvdata->card->dev, "Opening input for card %s\n",
+		drvdata->card->shortname);
+
+	err = snd_serial_generic_ensure_serdev_open(drvdata);
+	if (err < 0)
+		return err;
+
+	set_bit(SERIAL_MODE_INPUT_OPEN, &drvdata->filemode);
+	drvdata->midi_input = substream;
+	return 0;
+}
+
+static int snd_serial_generic_input_close(struct snd_rawmidi_substream *substream)
+{
+	struct snd_serial_generic *drvdata = substream->rmidi->card->private_data;
+
+	dev_dbg(drvdata->card->dev, "Closing input for card %s\n",
+		drvdata->card->shortname);
+
+	clear_bit(SERIAL_MODE_INPUT_OPEN, &drvdata->filemode);
+	clear_bit(SERIAL_MODE_INPUT_TRIGGERED, &drvdata->filemode);
+
+	drvdata->midi_input = NULL;
+
+	if (!drvdata->filemode)
+		serdev_device_close(drvdata->serdev);
+	return 0;
+}
+
+static void snd_serial_generic_input_trigger(struct snd_rawmidi_substream *substream,
+					int up)
+{
+	struct snd_serial_generic *drvdata = substream->rmidi->card->private_data;
+
+	if (up)
+		set_bit(SERIAL_MODE_INPUT_TRIGGERED, &drvdata->filemode);
+	else
+		clear_bit(SERIAL_MODE_INPUT_TRIGGERED, &drvdata->filemode);
+}
+
+static int snd_serial_generic_output_open(struct snd_rawmidi_substream *substream)
+{
+	struct snd_serial_generic *drvdata = substream->rmidi->card->private_data;
+	int err;
+
+	dev_dbg(drvdata->card->dev, "Opening output for card %s\n",
+		drvdata->card->shortname);
+
+	err = snd_serial_generic_ensure_serdev_open(drvdata);
+	if (err < 0)
+		return err;
+
+	set_bit(SERIAL_MODE_OUTPUT_OPEN, &drvdata->filemode);
+
+	drvdata->midi_output = substream;
+	return 0;
+};
+
+static int snd_serial_generic_output_close(struct snd_rawmidi_substream *substream)
+{
+	struct snd_serial_generic *drvdata = substream->rmidi->card->private_data;
+
+	dev_dbg(drvdata->card->dev, "Closing output for card %s\n",
+		drvdata->card->shortname);
+
+	clear_bit(SERIAL_MODE_OUTPUT_OPEN, &drvdata->filemode);
+	clear_bit(SERIAL_MODE_OUTPUT_TRIGGERED, &drvdata->filemode);
+
+	if (!drvdata->filemode)
+		serdev_device_close(drvdata->serdev);
+
+	drvdata->midi_output = NULL;
+
+	return 0;
+};
+
+static void snd_serial_generic_output_trigger(struct snd_rawmidi_substream *substream,
+					 int up)
+{
+	struct snd_serial_generic *drvdata = substream->rmidi->card->private_data;
+
+	if (up)
+		set_bit(SERIAL_MODE_OUTPUT_TRIGGERED, &drvdata->filemode);
+	else
+		clear_bit(SERIAL_MODE_OUTPUT_TRIGGERED, &drvdata->filemode);
+
+	if (up)
+		snd_serial_generic_tx_wakeup(drvdata);
+}
+
+static void snd_serial_generic_output_drain(struct snd_rawmidi_substream *substream)
+{
+	struct snd_serial_generic *drvdata = substream->rmidi->card->private_data;
+
+	/* Flush any pending characters */
+	serdev_device_write_flush(drvdata->serdev);
+	cancel_work_sync(&drvdata->tx_work);
+}
+
+static const struct snd_rawmidi_ops snd_serial_generic_output = {
+	.open =		snd_serial_generic_output_open,
+	.close =	snd_serial_generic_output_close,
+	.trigger =	snd_serial_generic_output_trigger,
+	.drain =	snd_serial_generic_output_drain,
+};
+
+static const struct snd_rawmidi_ops snd_serial_generic_input = {
+	.open =		snd_serial_generic_input_open,
+	.close =	snd_serial_generic_input_close,
+	.trigger =	snd_serial_generic_input_trigger,
+};
+
+static void snd_serial_generic_parse_dt(struct serdev_device *serdev,
+				struct snd_serial_generic *drvdata)
+{
+	int err;
+
+	err = of_property_read_u32(serdev->dev.of_node, "current-speed",
+		&drvdata->baudrate);
+	if (err < 0) {
+		dev_dbg(drvdata->card->dev,
+			"MIDI device reading of current-speed DT param failed with error %d, using default of 38400\n",
+			err);
+		drvdata->baudrate = 38400;
+	}
+
+}
+
+static void snd_serial_generic_substreams(struct snd_rawmidi_str *stream, int dev_num)
+{
+	struct snd_rawmidi_substream *substream;
+
+	list_for_each_entry(substream, &stream->substreams, list) {
+		sprintf(substream->name, "Serial MIDI %d-%d", dev_num, substream->number);
+	}
+}
+
+static int snd_serial_generic_rmidi(struct snd_serial_generic *drvdata,
+				int outs, int ins, struct snd_rawmidi **rmidi)
+{
+	struct snd_rawmidi *rrawmidi;
+	int err;
+
+	err = snd_rawmidi_new(drvdata->card, drvdata->card->driver, 0,
+				outs, ins, &rrawmidi);
+
+	if (err < 0)
+		return err;
+
+	snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_INPUT,
+				&snd_serial_generic_input);
+	snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
+				&snd_serial_generic_output);
+	strcpy(rrawmidi->name, drvdata->card->shortname);
+
+	snd_serial_generic_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
+					drvdata->serdev->ctrl->nr);
+	snd_serial_generic_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
+					drvdata->serdev->ctrl->nr);
+
+	rrawmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
+			       SNDRV_RAWMIDI_INFO_INPUT |
+			       SNDRV_RAWMIDI_INFO_DUPLEX;
+
+	if (rmidi)
+		*rmidi = rrawmidi;
+	return 0;
+}
+
+static int snd_serial_generic_probe(struct serdev_device *serdev)
+{
+	struct snd_card *card;
+	struct snd_serial_generic *drvdata;
+	int err;
+
+	err  = snd_devm_card_new(&serdev->dev, SNDRV_DEFAULT_IDX1,
+				SNDRV_DEFAULT_STR1, THIS_MODULE,
+				sizeof(struct snd_serial_generic), &card);
+
+	if (err < 0)
+		return err;
+
+	strcpy(card->driver, "SerialMIDI");
+	sprintf(card->shortname, "SerialMIDI-%d", serdev->ctrl->nr);
+	sprintf(card->longname, "Serial MIDI device at serial%d", serdev->ctrl->nr);
+
+	drvdata = card->private_data;
+
+	drvdata->serdev = serdev;
+	drvdata->card = card;
+
+	snd_serial_generic_parse_dt(serdev, drvdata);
+
+	INIT_WORK(&drvdata->tx_work, snd_serial_generic_tx_work);
+
+	err = snd_serial_generic_rmidi(drvdata, 1, 1, &drvdata->rmidi);
+	if (err < 0)
+		return err;
+
+	serdev_device_set_client_ops(serdev, &snd_serial_generic_serdev_device_ops);
+	serdev_device_set_drvdata(drvdata->serdev, drvdata);
+
+	err = snd_card_register(card);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static const struct of_device_id snd_serial_generic_dt_ids[] = {
+	{ .compatible = "serial-midi" },
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, snd_serial_generic_dt_ids);
+
+static struct serdev_device_driver snd_serial_generic_driver = {
+	.driver	= {
+		.name		= "snd-serial-generic",
+		.of_match_table	= of_match_ptr(snd_serial_generic_dt_ids),
+	},
+	.probe	= snd_serial_generic_probe,
+};
+
+module_serdev_device_driver(snd_serial_generic_driver);