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, 339 insertions, 0 deletions

diff --git a/drivers/misc/bcm-vk/bcm_vk_tty.c b/drivers/misc/bcm-vk/bcm_vk_tty.c
new file mode 100644
index 000000000..6669625ba
--- /dev/null
+++ b/drivers/misc/bcm-vk/bcm_vk_tty.c
@@ -0,0 +1,339 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2018-2020 Broadcom.
+ */
+
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+
+#include "bcm_vk.h"
+
+/* TTYVK base offset is 0x30000 into BAR1 */
+#define BAR1_TTYVK_BASE_OFFSET	0x300000
+/* Each TTYVK channel (TO or FROM) is 0x10000 */
+#define BAR1_TTYVK_CHAN_OFFSET	0x100000
+/* Each TTYVK channel has TO and FROM, hence the * 2 */
+#define BAR1_TTYVK_BASE(index)	(BAR1_TTYVK_BASE_OFFSET + \
+				 ((index) * BAR1_TTYVK_CHAN_OFFSET * 2))
+/* TO TTYVK channel base comes before FROM for each index */
+#define TO_TTYK_BASE(index)	BAR1_TTYVK_BASE(index)
+#define FROM_TTYK_BASE(index)	(BAR1_TTYVK_BASE(index) + \
+				 BAR1_TTYVK_CHAN_OFFSET)
+
+struct bcm_vk_tty_chan {
+	u32 reserved;
+	u32 size;
+	u32 wr;
+	u32 rd;
+	u32 *data;
+};
+
+#define VK_BAR_CHAN(v, DIR, e)	((v)->DIR##_offset \
+				 + offsetof(struct bcm_vk_tty_chan, e))
+#define VK_BAR_CHAN_SIZE(v, DIR)	VK_BAR_CHAN(v, DIR, size)
+#define VK_BAR_CHAN_WR(v, DIR)		VK_BAR_CHAN(v, DIR, wr)
+#define VK_BAR_CHAN_RD(v, DIR)		VK_BAR_CHAN(v, DIR, rd)
+#define VK_BAR_CHAN_DATA(v, DIR, off)	(VK_BAR_CHAN(v, DIR, data) + (off))
+
+#define VK_BAR0_REGSEG_TTY_DB_OFFSET	0x86c
+
+/* Poll every 1/10 of second - temp hack till we use MSI interrupt */
+#define SERIAL_TIMER_VALUE (HZ / 10)
+
+static void bcm_vk_tty_poll(struct timer_list *t)
+{
+	struct bcm_vk *vk = from_timer(vk, t, serial_timer);
+
+	queue_work(vk->tty_wq_thread, &vk->tty_wq_work);
+	mod_timer(&vk->serial_timer, jiffies + SERIAL_TIMER_VALUE);
+}
+
+irqreturn_t bcm_vk_tty_irqhandler(int irq, void *dev_id)
+{
+	struct bcm_vk *vk = dev_id;
+
+	queue_work(vk->tty_wq_thread, &vk->tty_wq_work);
+
+	return IRQ_HANDLED;
+}
+
+static void bcm_vk_tty_wq_handler(struct work_struct *work)
+{
+	struct bcm_vk *vk = container_of(work, struct bcm_vk, tty_wq_work);
+	struct bcm_vk_tty *vktty;
+	int card_status;
+	int count;
+	unsigned char c;
+	int i;
+	int wr;
+
+	card_status = vkread32(vk, BAR_0, BAR_CARD_STATUS);
+	if (BCM_VK_INTF_IS_DOWN(card_status))
+		return;
+
+	for (i = 0; i < BCM_VK_NUM_TTY; i++) {
+		count = 0;
+		/* Check the card status that the tty channel is ready */
+		if ((card_status & BIT(i)) == 0)
+			continue;
+
+		vktty = &vk->tty[i];
+
+		/* Don't increment read index if tty app is closed */
+		if (!vktty->is_opened)
+			continue;
+
+		/* Fetch the wr offset in buffer from VK */
+		wr = vkread32(vk, BAR_1, VK_BAR_CHAN_WR(vktty, from));
+
+		/* safe to ignore until bar read gives proper size */
+		if (vktty->from_size == 0)
+			continue;
+
+		if (wr >= vktty->from_size) {
+			dev_err(&vk->pdev->dev,
+				"ERROR: wq handler ttyVK%d wr:0x%x > 0x%x\n",
+				i, wr, vktty->from_size);
+			/* Need to signal and close device in this case */
+			continue;
+		}
+
+		/*
+		 * Simple read of circular buffer and
+		 * insert into tty flip buffer
+		 */
+		while (vk->tty[i].rd != wr) {
+			c = vkread8(vk, BAR_1,
+				    VK_BAR_CHAN_DATA(vktty, from, vktty->rd));
+			vktty->rd++;
+			if (vktty->rd >= vktty->from_size)
+				vktty->rd = 0;
+			tty_insert_flip_char(&vktty->port, c, TTY_NORMAL);
+			count++;
+		}
+
+		if (count) {
+			tty_flip_buffer_push(&vktty->port);
+
+			/* Update read offset from shadow register to card */
+			vkwrite32(vk, vktty->rd, BAR_1,
+				  VK_BAR_CHAN_RD(vktty, from));
+		}
+	}
+}
+
+static int bcm_vk_tty_open(struct tty_struct *tty, struct file *file)
+{
+	int card_status;
+	struct bcm_vk *vk;
+	struct bcm_vk_tty *vktty;
+	int index;
+
+	/* initialize the pointer in case something fails */
+	tty->driver_data = NULL;
+
+	vk = (struct bcm_vk *)dev_get_drvdata(tty->dev);
+	index = tty->index;
+
+	if (index >= BCM_VK_NUM_TTY)
+		return -EINVAL;
+
+	vktty = &vk->tty[index];
+
+	vktty->pid = task_pid_nr(current);
+	vktty->to_offset = TO_TTYK_BASE(index);
+	vktty->from_offset = FROM_TTYK_BASE(index);
+
+	/* Do not allow tty device to be opened if tty on card not ready */
+	card_status = vkread32(vk, BAR_0, BAR_CARD_STATUS);
+	if (BCM_VK_INTF_IS_DOWN(card_status) || ((card_status & BIT(index)) == 0))
+		return -EBUSY;
+
+	/*
+	 * Get shadow registers of the buffer sizes and the "to" write offset
+	 * and "from" read offset
+	 */
+	vktty->to_size = vkread32(vk, BAR_1, VK_BAR_CHAN_SIZE(vktty, to));
+	vktty->wr = vkread32(vk, BAR_1,  VK_BAR_CHAN_WR(vktty, to));
+	vktty->from_size = vkread32(vk, BAR_1, VK_BAR_CHAN_SIZE(vktty, from));
+	vktty->rd = vkread32(vk, BAR_1,  VK_BAR_CHAN_RD(vktty, from));
+	vktty->is_opened = true;
+
+	if (tty->count == 1 && !vktty->irq_enabled) {
+		timer_setup(&vk->serial_timer, bcm_vk_tty_poll, 0);
+		mod_timer(&vk->serial_timer, jiffies + SERIAL_TIMER_VALUE);
+	}
+	return 0;
+}
+
+static void bcm_vk_tty_close(struct tty_struct *tty, struct file *file)
+{
+	struct bcm_vk *vk = dev_get_drvdata(tty->dev);
+
+	if (tty->index >= BCM_VK_NUM_TTY)
+		return;
+
+	vk->tty[tty->index].is_opened = false;
+
+	if (tty->count == 1)
+		del_timer_sync(&vk->serial_timer);
+}
+
+static void bcm_vk_tty_doorbell(struct bcm_vk *vk, u32 db_val)
+{
+	vkwrite32(vk, db_val, BAR_0,
+		  VK_BAR0_REGSEG_DB_BASE + VK_BAR0_REGSEG_TTY_DB_OFFSET);
+}
+
+static int bcm_vk_tty_write(struct tty_struct *tty,
+			    const unsigned char *buffer,
+			    int count)
+{
+	int index;
+	struct bcm_vk *vk;
+	struct bcm_vk_tty *vktty;
+	int i;
+
+	index = tty->index;
+	vk = dev_get_drvdata(tty->dev);
+	vktty = &vk->tty[index];
+
+	/* Simple write each byte to circular buffer */
+	for (i = 0; i < count; i++) {
+		vkwrite8(vk, buffer[i], BAR_1,
+			 VK_BAR_CHAN_DATA(vktty, to, vktty->wr));
+		vktty->wr++;
+		if (vktty->wr >= vktty->to_size)
+			vktty->wr = 0;
+	}
+	/* Update write offset from shadow register to card */
+	vkwrite32(vk, vktty->wr, BAR_1, VK_BAR_CHAN_WR(vktty, to));
+	bcm_vk_tty_doorbell(vk, 0);
+
+	return count;
+}
+
+static unsigned int bcm_vk_tty_write_room(struct tty_struct *tty)
+{
+	struct bcm_vk *vk = dev_get_drvdata(tty->dev);
+
+	return vk->tty[tty->index].to_size - 1;
+}
+
+static const struct tty_operations serial_ops = {
+	.open = bcm_vk_tty_open,
+	.close = bcm_vk_tty_close,
+	.write = bcm_vk_tty_write,
+	.write_room = bcm_vk_tty_write_room,
+};
+
+int bcm_vk_tty_init(struct bcm_vk *vk, char *name)
+{
+	int i;
+	int err;
+	struct tty_driver *tty_drv;
+	struct device *dev = &vk->pdev->dev;
+
+	tty_drv = tty_alloc_driver
+				(BCM_VK_NUM_TTY,
+				 TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV);
+	if (IS_ERR(tty_drv))
+		return PTR_ERR(tty_drv);
+
+	/* Save struct tty_driver for uninstalling the device */
+	vk->tty_drv = tty_drv;
+
+	/* initialize the tty driver */
+	tty_drv->driver_name = KBUILD_MODNAME;
+	tty_drv->name = kstrdup(name, GFP_KERNEL);
+	if (!tty_drv->name) {
+		err = -ENOMEM;
+		goto err_tty_driver_kref_put;
+	}
+	tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
+	tty_drv->subtype = SERIAL_TYPE_NORMAL;
+	tty_drv->init_termios = tty_std_termios;
+	tty_set_operations(tty_drv, &serial_ops);
+
+	/* register the tty driver */
+	err = tty_register_driver(tty_drv);
+	if (err) {
+		dev_err(dev, "tty_register_driver failed\n");
+		goto err_kfree_tty_name;
+	}
+
+	for (i = 0; i < BCM_VK_NUM_TTY; i++) {
+		struct device *tty_dev;
+
+		tty_port_init(&vk->tty[i].port);
+		tty_dev = tty_port_register_device_attr(&vk->tty[i].port,
+							tty_drv, i, dev, vk,
+							NULL);
+		if (IS_ERR(tty_dev)) {
+			err = PTR_ERR(tty_dev);
+			goto unwind;
+		}
+		vk->tty[i].is_opened = false;
+	}
+
+	INIT_WORK(&vk->tty_wq_work, bcm_vk_tty_wq_handler);
+	vk->tty_wq_thread = create_singlethread_workqueue("tty");
+	if (!vk->tty_wq_thread) {
+		dev_err(dev, "Fail to create tty workqueue thread\n");
+		err = -ENOMEM;
+		goto unwind;
+	}
+	return 0;
+
+unwind:
+	while (--i >= 0)
+		tty_port_unregister_device(&vk->tty[i].port, tty_drv, i);
+	tty_unregister_driver(tty_drv);
+
+err_kfree_tty_name:
+	kfree(tty_drv->name);
+	tty_drv->name = NULL;
+
+err_tty_driver_kref_put:
+	tty_driver_kref_put(tty_drv);
+
+	return err;
+}
+
+void bcm_vk_tty_exit(struct bcm_vk *vk)
+{
+	int i;
+
+	del_timer_sync(&vk->serial_timer);
+	for (i = 0; i < BCM_VK_NUM_TTY; ++i) {
+		tty_port_unregister_device(&vk->tty[i].port,
+					   vk->tty_drv,
+					   i);
+		tty_port_destroy(&vk->tty[i].port);
+	}
+	tty_unregister_driver(vk->tty_drv);
+
+	kfree(vk->tty_drv->name);
+	vk->tty_drv->name = NULL;
+
+	tty_driver_kref_put(vk->tty_drv);
+}
+
+void bcm_vk_tty_terminate_tty_user(struct bcm_vk *vk)
+{
+	struct bcm_vk_tty *vktty;
+	int i;
+
+	for (i = 0; i < BCM_VK_NUM_TTY; ++i) {
+		vktty = &vk->tty[i];
+		if (vktty->pid)
+			kill_pid(find_vpid(vktty->pid), SIGKILL, 1);
+	}
+}
+
+void bcm_vk_tty_wq_exit(struct bcm_vk *vk)
+{
+	cancel_work_sync(&vk->tty_wq_work);
+	destroy_workqueue(vk->tty_wq_thread);
+}