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, 378 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-digicolor.c b/drivers/i2c/busses/i2c-digicolor.c
new file mode 100644
index 000000000..50925d97f
--- /dev/null
+++ b/drivers/i2c/busses/i2c-digicolor.c
@@ -0,0 +1,378 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * I2C bus driver for Conexant Digicolor SoCs
+ *
+ * Author: Baruch Siach <baruch@tkos.co.il>
+ *
+ * Copyright (C) 2015 Paradox Innovation Ltd.
+ */
+
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#define TIMEOUT_MS		100
+
+#define II_CONTROL		0x0
+#define II_CONTROL_LOCAL_RESET	BIT(0)
+
+#define II_CLOCKTIME		0x1
+
+#define II_COMMAND		0x2
+#define II_CMD_START		1
+#define II_CMD_RESTART		2
+#define II_CMD_SEND_ACK		3
+#define II_CMD_GET_ACK		6
+#define II_CMD_GET_NOACK	7
+#define II_CMD_STOP		10
+#define II_COMMAND_GO		BIT(7)
+#define II_COMMAND_COMPLETION_STATUS(r)	(((r) >> 5) & 3)
+#define II_CMD_STATUS_NORMAL	0
+#define II_CMD_STATUS_ACK_GOOD	1
+#define II_CMD_STATUS_ACK_BAD	2
+#define II_CMD_STATUS_ABORT	3
+
+#define II_DATA			0x3
+#define II_INTFLAG_CLEAR	0x8
+#define II_INTENABLE		0xa
+
+struct dc_i2c {
+	struct i2c_adapter	adap;
+	struct device		*dev;
+	void __iomem		*regs;
+	struct clk		*clk;
+	unsigned int		frequency;
+
+	struct i2c_msg		*msg;
+	unsigned int		msgbuf_ptr;
+	int			last;
+	spinlock_t		lock;
+	struct completion	done;
+	int			state;
+	int			error;
+};
+
+enum {
+	STATE_IDLE,
+	STATE_START,
+	STATE_ADDR,
+	STATE_WRITE,
+	STATE_READ,
+	STATE_STOP,
+};
+
+static void dc_i2c_cmd(struct dc_i2c *i2c, u8 cmd)
+{
+	writeb_relaxed(cmd | II_COMMAND_GO, i2c->regs + II_COMMAND);
+}
+
+static u8 dc_i2c_addr_cmd(struct i2c_msg *msg)
+{
+	u8 addr = (msg->addr & 0x7f) << 1;
+
+	if (msg->flags & I2C_M_RD)
+		addr |= 1;
+
+	return addr;
+}
+
+static void dc_i2c_data(struct dc_i2c *i2c, u8 data)
+{
+	writeb_relaxed(data, i2c->regs + II_DATA);
+}
+
+static void dc_i2c_write_byte(struct dc_i2c *i2c, u8 byte)
+{
+	dc_i2c_data(i2c, byte);
+	dc_i2c_cmd(i2c, II_CMD_SEND_ACK);
+}
+
+static void dc_i2c_write_buf(struct dc_i2c *i2c)
+{
+	dc_i2c_write_byte(i2c, i2c->msg->buf[i2c->msgbuf_ptr++]);
+}
+
+static void dc_i2c_next_read(struct dc_i2c *i2c)
+{
+	bool last = (i2c->msgbuf_ptr + 1 == i2c->msg->len);
+
+	dc_i2c_cmd(i2c, last ? II_CMD_GET_NOACK : II_CMD_GET_ACK);
+}
+
+static void dc_i2c_stop(struct dc_i2c *i2c)
+{
+	i2c->state = STATE_STOP;
+	if (i2c->last)
+		dc_i2c_cmd(i2c, II_CMD_STOP);
+	else
+		complete(&i2c->done);
+}
+
+static u8 dc_i2c_read_byte(struct dc_i2c *i2c)
+{
+	return readb_relaxed(i2c->regs + II_DATA);
+}
+
+static void dc_i2c_read_buf(struct dc_i2c *i2c)
+{
+	i2c->msg->buf[i2c->msgbuf_ptr++] = dc_i2c_read_byte(i2c);
+	dc_i2c_next_read(i2c);
+}
+
+static void dc_i2c_set_irq(struct dc_i2c *i2c, int enable)
+{
+	if (enable)
+		writeb_relaxed(1, i2c->regs + II_INTFLAG_CLEAR);
+	writeb_relaxed(!!enable, i2c->regs + II_INTENABLE);
+}
+
+static int dc_i2c_cmd_status(struct dc_i2c *i2c)
+{
+	u8 cmd = readb_relaxed(i2c->regs + II_COMMAND);
+
+	return II_COMMAND_COMPLETION_STATUS(cmd);
+}
+
+static void dc_i2c_start_msg(struct dc_i2c *i2c, int first)
+{
+	struct i2c_msg *msg = i2c->msg;
+
+	if (!(msg->flags & I2C_M_NOSTART)) {
+		i2c->state = STATE_START;
+		dc_i2c_cmd(i2c, first ? II_CMD_START : II_CMD_RESTART);
+	} else if (msg->flags & I2C_M_RD) {
+		i2c->state = STATE_READ;
+		dc_i2c_next_read(i2c);
+	} else {
+		i2c->state = STATE_WRITE;
+		dc_i2c_write_buf(i2c);
+	}
+}
+
+static irqreturn_t dc_i2c_irq(int irq, void *dev_id)
+{
+	struct dc_i2c *i2c = dev_id;
+	int cmd_status = dc_i2c_cmd_status(i2c);
+	u8 addr_cmd;
+
+	writeb_relaxed(1, i2c->regs + II_INTFLAG_CLEAR);
+
+	spin_lock(&i2c->lock);
+
+	if (cmd_status == II_CMD_STATUS_ACK_BAD
+	    || cmd_status == II_CMD_STATUS_ABORT) {
+		i2c->error = -EIO;
+		complete(&i2c->done);
+		goto out;
+	}
+
+	switch (i2c->state) {
+	case STATE_START:
+		addr_cmd = dc_i2c_addr_cmd(i2c->msg);
+		dc_i2c_write_byte(i2c, addr_cmd);
+		i2c->state = STATE_ADDR;
+		break;
+	case STATE_ADDR:
+		if (i2c->msg->flags & I2C_M_RD) {
+			dc_i2c_next_read(i2c);
+			i2c->state = STATE_READ;
+			break;
+		}
+		i2c->state = STATE_WRITE;
+		fallthrough;
+	case STATE_WRITE:
+		if (i2c->msgbuf_ptr < i2c->msg->len)
+			dc_i2c_write_buf(i2c);
+		else
+			dc_i2c_stop(i2c);
+		break;
+	case STATE_READ:
+		if (i2c->msgbuf_ptr < i2c->msg->len)
+			dc_i2c_read_buf(i2c);
+		else
+			dc_i2c_stop(i2c);
+		break;
+	case STATE_STOP:
+		i2c->state = STATE_IDLE;
+		complete(&i2c->done);
+		break;
+	}
+
+out:
+	spin_unlock(&i2c->lock);
+	return IRQ_HANDLED;
+}
+
+static int dc_i2c_xfer_msg(struct dc_i2c *i2c, struct i2c_msg *msg, int first,
+			   int last)
+{
+	unsigned long timeout = msecs_to_jiffies(TIMEOUT_MS);
+	unsigned long flags;
+
+	spin_lock_irqsave(&i2c->lock, flags);
+	i2c->msg = msg;
+	i2c->msgbuf_ptr = 0;
+	i2c->last = last;
+	i2c->error = 0;
+
+	reinit_completion(&i2c->done);
+	dc_i2c_set_irq(i2c, 1);
+	dc_i2c_start_msg(i2c, first);
+	spin_unlock_irqrestore(&i2c->lock, flags);
+
+	timeout = wait_for_completion_timeout(&i2c->done, timeout);
+	dc_i2c_set_irq(i2c, 0);
+	if (timeout == 0) {
+		i2c->state = STATE_IDLE;
+		return -ETIMEDOUT;
+	}
+
+	if (i2c->error)
+		return i2c->error;
+
+	return 0;
+}
+
+static int dc_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
+{
+	struct dc_i2c *i2c = adap->algo_data;
+	int i, ret;
+
+	for (i = 0; i < num; i++) {
+		ret = dc_i2c_xfer_msg(i2c, &msgs[i], i == 0, i == num - 1);
+		if (ret)
+			return ret;
+	}
+
+	return num;
+}
+
+static int dc_i2c_init_hw(struct dc_i2c *i2c)
+{
+	unsigned long clk_rate = clk_get_rate(i2c->clk);
+	unsigned int clocktime;
+
+	writeb_relaxed(II_CONTROL_LOCAL_RESET, i2c->regs + II_CONTROL);
+	udelay(100);
+	writeb_relaxed(0, i2c->regs + II_CONTROL);
+	udelay(100);
+
+	clocktime = DIV_ROUND_UP(clk_rate, 64 * i2c->frequency);
+	if (clocktime < 1 || clocktime > 0xff) {
+		dev_err(i2c->dev, "can't set bus speed of %u Hz\n",
+			i2c->frequency);
+		return -EINVAL;
+	}
+	writeb_relaxed(clocktime - 1, i2c->regs + II_CLOCKTIME);
+
+	return 0;
+}
+
+static u32 dc_i2c_func(struct i2c_adapter *adap)
+{
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_NOSTART;
+}
+
+static const struct i2c_algorithm dc_i2c_algorithm = {
+	.master_xfer	= dc_i2c_xfer,
+	.functionality	= dc_i2c_func,
+};
+
+static int dc_i2c_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct dc_i2c *i2c;
+	int ret = 0, irq;
+
+	i2c = devm_kzalloc(&pdev->dev, sizeof(struct dc_i2c), GFP_KERNEL);
+	if (!i2c)
+		return -ENOMEM;
+
+	if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
+				 &i2c->frequency))
+		i2c->frequency = I2C_MAX_STANDARD_MODE_FREQ;
+
+	i2c->dev = &pdev->dev;
+	platform_set_drvdata(pdev, i2c);
+
+	spin_lock_init(&i2c->lock);
+	init_completion(&i2c->done);
+
+	i2c->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(i2c->clk))
+		return PTR_ERR(i2c->clk);
+
+	i2c->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(i2c->regs))
+		return PTR_ERR(i2c->regs);
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	ret = devm_request_irq(&pdev->dev, irq, dc_i2c_irq, 0,
+			       dev_name(&pdev->dev), i2c);
+	if (ret < 0)
+		return ret;
+
+	strscpy(i2c->adap.name, "Conexant Digicolor I2C adapter",
+		sizeof(i2c->adap.name));
+	i2c->adap.owner = THIS_MODULE;
+	i2c->adap.algo = &dc_i2c_algorithm;
+	i2c->adap.dev.parent = &pdev->dev;
+	i2c->adap.dev.of_node = np;
+	i2c->adap.algo_data = i2c;
+
+	ret = dc_i2c_init_hw(i2c);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(i2c->clk);
+	if (ret < 0)
+		return ret;
+
+	ret = i2c_add_adapter(&i2c->adap);
+	if (ret < 0) {
+		clk_disable_unprepare(i2c->clk);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int dc_i2c_remove(struct platform_device *pdev)
+{
+	struct dc_i2c *i2c = platform_get_drvdata(pdev);
+
+	i2c_del_adapter(&i2c->adap);
+	clk_disable_unprepare(i2c->clk);
+
+	return 0;
+}
+
+static const struct of_device_id dc_i2c_match[] = {
+	{ .compatible = "cnxt,cx92755-i2c" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, dc_i2c_match);
+
+static struct platform_driver dc_i2c_driver = {
+	.probe   = dc_i2c_probe,
+	.remove  = dc_i2c_remove,
+	.driver  = {
+		.name  = "digicolor-i2c",
+		.of_match_table = dc_i2c_match,
+	},
+};
+module_platform_driver(dc_i2c_driver);
+
+MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
+MODULE_DESCRIPTION("Conexant Digicolor I2C master driver");
+MODULE_LICENSE("GPL v2");