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, 886 insertions, 0 deletions

diff --git a/drivers/net/phy/bcm54140.c b/drivers/net/phy/bcm54140.c
new file mode 100644
index 000000000..d8f302486
--- /dev/null
+++ b/drivers/net/phy/bcm54140.c
@@ -0,0 +1,886 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Broadcom BCM54140 Quad SGMII/QSGMII Copper/Fiber Gigabit PHY
+ *
+ * Copyright (c) 2020 Michael Walle <michael@walle.cc>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/brcmphy.h>
+#include <linux/hwmon.h>
+#include <linux/module.h>
+#include <linux/phy.h>
+
+#include "bcm-phy-lib.h"
+
+/* RDB per-port registers
+ */
+#define BCM54140_RDB_ISR		0x00a	/* interrupt status */
+#define BCM54140_RDB_IMR		0x00b	/* interrupt mask */
+#define  BCM54140_RDB_INT_LINK		BIT(1)	/* link status changed */
+#define  BCM54140_RDB_INT_SPEED		BIT(2)	/* link speed change */
+#define  BCM54140_RDB_INT_DUPLEX	BIT(3)	/* duplex mode changed */
+#define BCM54140_RDB_SPARE1		0x012	/* spare control 1 */
+#define  BCM54140_RDB_SPARE1_LSLM	BIT(2)	/* link speed LED mode */
+#define BCM54140_RDB_SPARE2		0x014	/* spare control 2 */
+#define  BCM54140_RDB_SPARE2_WS_RTRY_DIS BIT(8) /* wirespeed retry disable */
+#define  BCM54140_RDB_SPARE2_WS_RTRY_LIMIT GENMASK(4, 2) /* retry limit */
+#define BCM54140_RDB_SPARE3		0x015	/* spare control 3 */
+#define  BCM54140_RDB_SPARE3_BIT0	BIT(0)
+#define BCM54140_RDB_LED_CTRL		0x019	/* LED control */
+#define  BCM54140_RDB_LED_CTRL_ACTLINK0	BIT(4)
+#define  BCM54140_RDB_LED_CTRL_ACTLINK1	BIT(8)
+#define BCM54140_RDB_C_APWR		0x01a	/* auto power down control */
+#define  BCM54140_RDB_C_APWR_SINGLE_PULSE	BIT(8)	/* single pulse */
+#define  BCM54140_RDB_C_APWR_APD_MODE_DIS	0 /* ADP disable */
+#define  BCM54140_RDB_C_APWR_APD_MODE_EN	1 /* ADP enable */
+#define  BCM54140_RDB_C_APWR_APD_MODE_DIS2	2 /* ADP disable */
+#define  BCM54140_RDB_C_APWR_APD_MODE_EN_ANEG	3 /* ADP enable w/ aneg */
+#define  BCM54140_RDB_C_APWR_APD_MODE_MASK	GENMASK(6, 5)
+#define  BCM54140_RDB_C_APWR_SLP_TIM_MASK BIT(4)/* sleep timer */
+#define  BCM54140_RDB_C_APWR_SLP_TIM_2_7 0	/* 2.7s */
+#define  BCM54140_RDB_C_APWR_SLP_TIM_5_4 1	/* 5.4s */
+#define BCM54140_RDB_C_PWR		0x02a	/* copper power control */
+#define  BCM54140_RDB_C_PWR_ISOLATE	BIT(5)	/* super isolate mode */
+#define BCM54140_RDB_C_MISC_CTRL	0x02f	/* misc copper control */
+#define  BCM54140_RDB_C_MISC_CTRL_WS_EN BIT(4)	/* wirespeed enable */
+
+/* RDB global registers
+ */
+#define BCM54140_RDB_TOP_IMR		0x82d	/* interrupt mask */
+#define  BCM54140_RDB_TOP_IMR_PORT0	BIT(4)
+#define  BCM54140_RDB_TOP_IMR_PORT1	BIT(5)
+#define  BCM54140_RDB_TOP_IMR_PORT2	BIT(6)
+#define  BCM54140_RDB_TOP_IMR_PORT3	BIT(7)
+#define BCM54140_RDB_MON_CTRL		0x831	/* monitor control */
+#define  BCM54140_RDB_MON_CTRL_V_MODE	BIT(3)	/* voltage mode */
+#define  BCM54140_RDB_MON_CTRL_SEL_MASK	GENMASK(2, 1)
+#define  BCM54140_RDB_MON_CTRL_SEL_TEMP	0	/* meassure temperature */
+#define  BCM54140_RDB_MON_CTRL_SEL_1V0	1	/* meassure AVDDL 1.0V */
+#define  BCM54140_RDB_MON_CTRL_SEL_3V3	2	/* meassure AVDDH 3.3V */
+#define  BCM54140_RDB_MON_CTRL_SEL_RR	3	/* meassure all round-robin */
+#define  BCM54140_RDB_MON_CTRL_PWR_DOWN	BIT(0)	/* power-down monitor */
+#define BCM54140_RDB_MON_TEMP_VAL	0x832	/* temperature value */
+#define BCM54140_RDB_MON_TEMP_MAX	0x833	/* temperature high thresh */
+#define BCM54140_RDB_MON_TEMP_MIN	0x834	/* temperature low thresh */
+#define  BCM54140_RDB_MON_TEMP_DATA_MASK GENMASK(9, 0)
+#define BCM54140_RDB_MON_1V0_VAL	0x835	/* AVDDL 1.0V value */
+#define BCM54140_RDB_MON_1V0_MAX	0x836	/* AVDDL 1.0V high thresh */
+#define BCM54140_RDB_MON_1V0_MIN	0x837	/* AVDDL 1.0V low thresh */
+#define  BCM54140_RDB_MON_1V0_DATA_MASK	GENMASK(10, 0)
+#define BCM54140_RDB_MON_3V3_VAL	0x838	/* AVDDH 3.3V value */
+#define BCM54140_RDB_MON_3V3_MAX	0x839	/* AVDDH 3.3V high thresh */
+#define BCM54140_RDB_MON_3V3_MIN	0x83a	/* AVDDH 3.3V low thresh */
+#define  BCM54140_RDB_MON_3V3_DATA_MASK	GENMASK(11, 0)
+#define BCM54140_RDB_MON_ISR		0x83b	/* interrupt status */
+#define  BCM54140_RDB_MON_ISR_3V3	BIT(2)	/* AVDDH 3.3V alarm */
+#define  BCM54140_RDB_MON_ISR_1V0	BIT(1)	/* AVDDL 1.0V alarm */
+#define  BCM54140_RDB_MON_ISR_TEMP	BIT(0)	/* temperature alarm */
+
+/* According to the datasheet the formula is:
+ *   T = 413.35 - (0.49055 * bits[9:0])
+ */
+#define BCM54140_HWMON_TO_TEMP(v) (413350L - (v) * 491)
+#define BCM54140_HWMON_FROM_TEMP(v) DIV_ROUND_CLOSEST_ULL(413350L - (v), 491)
+
+/* According to the datasheet the formula is:
+ *   U = bits[11:0] / 1024 * 220 / 0.2
+ *
+ * Normalized:
+ *   U = bits[11:0] / 4096 * 2514
+ */
+#define BCM54140_HWMON_TO_IN_1V0(v) ((v) * 2514 >> 11)
+#define BCM54140_HWMON_FROM_IN_1V0(v) DIV_ROUND_CLOSEST_ULL(((v) << 11), 2514)
+
+/* According to the datasheet the formula is:
+ *   U = bits[10:0] / 1024 * 880 / 0.7
+ *
+ * Normalized:
+ *   U = bits[10:0] / 2048 * 4400
+ */
+#define BCM54140_HWMON_TO_IN_3V3(v) ((v) * 4400 >> 12)
+#define BCM54140_HWMON_FROM_IN_3V3(v) DIV_ROUND_CLOSEST_ULL(((v) << 12), 4400)
+
+#define BCM54140_HWMON_TO_IN(ch, v) ((ch) ? BCM54140_HWMON_TO_IN_3V3(v) \
+					  : BCM54140_HWMON_TO_IN_1V0(v))
+#define BCM54140_HWMON_FROM_IN(ch, v) ((ch) ? BCM54140_HWMON_FROM_IN_3V3(v) \
+					    : BCM54140_HWMON_FROM_IN_1V0(v))
+#define BCM54140_HWMON_IN_MASK(ch) ((ch) ? BCM54140_RDB_MON_3V3_DATA_MASK \
+					 : BCM54140_RDB_MON_1V0_DATA_MASK)
+#define BCM54140_HWMON_IN_VAL_REG(ch) ((ch) ? BCM54140_RDB_MON_3V3_VAL \
+					    : BCM54140_RDB_MON_1V0_VAL)
+#define BCM54140_HWMON_IN_MIN_REG(ch) ((ch) ? BCM54140_RDB_MON_3V3_MIN \
+					    : BCM54140_RDB_MON_1V0_MIN)
+#define BCM54140_HWMON_IN_MAX_REG(ch) ((ch) ? BCM54140_RDB_MON_3V3_MAX \
+					    : BCM54140_RDB_MON_1V0_MAX)
+#define BCM54140_HWMON_IN_ALARM_BIT(ch) ((ch) ? BCM54140_RDB_MON_ISR_3V3 \
+					      : BCM54140_RDB_MON_ISR_1V0)
+
+/* This PHY has two different PHY IDs depening on its MODE_SEL pin. This
+ * pin choses between 4x SGMII and QSGMII mode:
+ *   AE02_5009 4x SGMII
+ *   AE02_5019 QSGMII
+ */
+#define BCM54140_PHY_ID_MASK	0xffffffe8
+
+#define BCM54140_PHY_ID_REV(phy_id)	((phy_id) & 0x7)
+#define BCM54140_REV_B0			1
+
+#define BCM54140_DEFAULT_DOWNSHIFT 5
+#define BCM54140_MAX_DOWNSHIFT 9
+
+struct bcm54140_priv {
+	int port;
+	int base_addr;
+#if IS_ENABLED(CONFIG_HWMON)
+	/* protect the alarm bits */
+	struct mutex alarm_lock;
+	u16 alarm;
+#endif
+};
+
+#if IS_ENABLED(CONFIG_HWMON)
+static umode_t bcm54140_hwmon_is_visible(const void *data,
+					 enum hwmon_sensor_types type,
+					 u32 attr, int channel)
+{
+	switch (type) {
+	case hwmon_in:
+		switch (attr) {
+		case hwmon_in_min:
+		case hwmon_in_max:
+			return 0644;
+		case hwmon_in_label:
+		case hwmon_in_input:
+		case hwmon_in_alarm:
+			return 0444;
+		default:
+			return 0;
+		}
+	case hwmon_temp:
+		switch (attr) {
+		case hwmon_temp_min:
+		case hwmon_temp_max:
+			return 0644;
+		case hwmon_temp_input:
+		case hwmon_temp_alarm:
+			return 0444;
+		default:
+			return 0;
+		}
+	default:
+		return 0;
+	}
+}
+
+static int bcm54140_hwmon_read_alarm(struct device *dev, unsigned int bit,
+				     long *val)
+{
+	struct phy_device *phydev = dev_get_drvdata(dev);
+	struct bcm54140_priv *priv = phydev->priv;
+	int tmp, ret = 0;
+
+	mutex_lock(&priv->alarm_lock);
+
+	/* latch any alarm bits */
+	tmp = bcm_phy_read_rdb(phydev, BCM54140_RDB_MON_ISR);
+	if (tmp < 0) {
+		ret = tmp;
+		goto out;
+	}
+	priv->alarm |= tmp;
+
+	*val = !!(priv->alarm & bit);
+	priv->alarm &= ~bit;
+
+out:
+	mutex_unlock(&priv->alarm_lock);
+	return ret;
+}
+
+static int bcm54140_hwmon_read_temp(struct device *dev, u32 attr, long *val)
+{
+	struct phy_device *phydev = dev_get_drvdata(dev);
+	u16 reg;
+	int tmp;
+
+	switch (attr) {
+	case hwmon_temp_input:
+		reg = BCM54140_RDB_MON_TEMP_VAL;
+		break;
+	case hwmon_temp_min:
+		reg = BCM54140_RDB_MON_TEMP_MIN;
+		break;
+	case hwmon_temp_max:
+		reg = BCM54140_RDB_MON_TEMP_MAX;
+		break;
+	case hwmon_temp_alarm:
+		return bcm54140_hwmon_read_alarm(dev,
+						 BCM54140_RDB_MON_ISR_TEMP,
+						 val);
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	tmp = bcm_phy_read_rdb(phydev, reg);
+	if (tmp < 0)
+		return tmp;
+
+	*val = BCM54140_HWMON_TO_TEMP(tmp & BCM54140_RDB_MON_TEMP_DATA_MASK);
+
+	return 0;
+}
+
+static int bcm54140_hwmon_read_in(struct device *dev, u32 attr,
+				  int channel, long *val)
+{
+	struct phy_device *phydev = dev_get_drvdata(dev);
+	u16 bit, reg;
+	int tmp;
+
+	switch (attr) {
+	case hwmon_in_input:
+		reg = BCM54140_HWMON_IN_VAL_REG(channel);
+		break;
+	case hwmon_in_min:
+		reg = BCM54140_HWMON_IN_MIN_REG(channel);
+		break;
+	case hwmon_in_max:
+		reg = BCM54140_HWMON_IN_MAX_REG(channel);
+		break;
+	case hwmon_in_alarm:
+		bit = BCM54140_HWMON_IN_ALARM_BIT(channel);
+		return bcm54140_hwmon_read_alarm(dev, bit, val);
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	tmp = bcm_phy_read_rdb(phydev, reg);
+	if (tmp < 0)
+		return tmp;
+
+	tmp &= BCM54140_HWMON_IN_MASK(channel);
+	*val = BCM54140_HWMON_TO_IN(channel, tmp);
+
+	return 0;
+}
+
+static int bcm54140_hwmon_read(struct device *dev,
+			       enum hwmon_sensor_types type, u32 attr,
+			       int channel, long *val)
+{
+	switch (type) {
+	case hwmon_temp:
+		return bcm54140_hwmon_read_temp(dev, attr, val);
+	case hwmon_in:
+		return bcm54140_hwmon_read_in(dev, attr, channel, val);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static const char *const bcm54140_hwmon_in_labels[] = {
+	"AVDDL",
+	"AVDDH",
+};
+
+static int bcm54140_hwmon_read_string(struct device *dev,
+				      enum hwmon_sensor_types type, u32 attr,
+				      int channel, const char **str)
+{
+	switch (type) {
+	case hwmon_in:
+		switch (attr) {
+		case hwmon_in_label:
+			*str = bcm54140_hwmon_in_labels[channel];
+			return 0;
+		default:
+			return -EOPNOTSUPP;
+		}
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int bcm54140_hwmon_write_temp(struct device *dev, u32 attr,
+				     int channel, long val)
+{
+	struct phy_device *phydev = dev_get_drvdata(dev);
+	u16 mask = BCM54140_RDB_MON_TEMP_DATA_MASK;
+	u16 reg;
+
+	val = clamp_val(val, BCM54140_HWMON_TO_TEMP(mask),
+			BCM54140_HWMON_TO_TEMP(0));
+
+	switch (attr) {
+	case hwmon_temp_min:
+		reg = BCM54140_RDB_MON_TEMP_MIN;
+		break;
+	case hwmon_temp_max:
+		reg = BCM54140_RDB_MON_TEMP_MAX;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return bcm_phy_modify_rdb(phydev, reg, mask,
+				  BCM54140_HWMON_FROM_TEMP(val));
+}
+
+static int bcm54140_hwmon_write_in(struct device *dev, u32 attr,
+				   int channel, long val)
+{
+	struct phy_device *phydev = dev_get_drvdata(dev);
+	u16 mask = BCM54140_HWMON_IN_MASK(channel);
+	u16 reg;
+
+	val = clamp_val(val, 0, BCM54140_HWMON_TO_IN(channel, mask));
+
+	switch (attr) {
+	case hwmon_in_min:
+		reg = BCM54140_HWMON_IN_MIN_REG(channel);
+		break;
+	case hwmon_in_max:
+		reg = BCM54140_HWMON_IN_MAX_REG(channel);
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return bcm_phy_modify_rdb(phydev, reg, mask,
+				  BCM54140_HWMON_FROM_IN(channel, val));
+}
+
+static int bcm54140_hwmon_write(struct device *dev,
+				enum hwmon_sensor_types type, u32 attr,
+				int channel, long val)
+{
+	switch (type) {
+	case hwmon_temp:
+		return bcm54140_hwmon_write_temp(dev, attr, channel, val);
+	case hwmon_in:
+		return bcm54140_hwmon_write_in(dev, attr, channel, val);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static const struct hwmon_channel_info *bcm54140_hwmon_info[] = {
+	HWMON_CHANNEL_INFO(temp,
+			   HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
+			   HWMON_T_ALARM),
+	HWMON_CHANNEL_INFO(in,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM | HWMON_I_LABEL,
+			   HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX |
+			   HWMON_I_ALARM | HWMON_I_LABEL),
+	NULL
+};
+
+static const struct hwmon_ops bcm54140_hwmon_ops = {
+	.is_visible = bcm54140_hwmon_is_visible,
+	.read = bcm54140_hwmon_read,
+	.read_string = bcm54140_hwmon_read_string,
+	.write = bcm54140_hwmon_write,
+};
+
+static const struct hwmon_chip_info bcm54140_chip_info = {
+	.ops = &bcm54140_hwmon_ops,
+	.info = bcm54140_hwmon_info,
+};
+
+static int bcm54140_enable_monitoring(struct phy_device *phydev)
+{
+	u16 mask, set;
+
+	/* 3.3V voltage mode */
+	set = BCM54140_RDB_MON_CTRL_V_MODE;
+
+	/* select round-robin */
+	mask = BCM54140_RDB_MON_CTRL_SEL_MASK;
+	set |= FIELD_PREP(BCM54140_RDB_MON_CTRL_SEL_MASK,
+			  BCM54140_RDB_MON_CTRL_SEL_RR);
+
+	/* remove power-down bit */
+	mask |= BCM54140_RDB_MON_CTRL_PWR_DOWN;
+
+	return bcm_phy_modify_rdb(phydev, BCM54140_RDB_MON_CTRL, mask, set);
+}
+
+static int bcm54140_probe_once(struct phy_device *phydev)
+{
+	struct device *hwmon;
+	int ret;
+
+	/* enable hardware monitoring */
+	ret = bcm54140_enable_monitoring(phydev);
+	if (ret)
+		return ret;
+
+	hwmon = devm_hwmon_device_register_with_info(&phydev->mdio.dev,
+						     "BCM54140", phydev,
+						     &bcm54140_chip_info,
+						     NULL);
+	return PTR_ERR_OR_ZERO(hwmon);
+}
+#endif
+
+static int bcm54140_base_read_rdb(struct phy_device *phydev, u16 rdb)
+{
+	int ret;
+
+	phy_lock_mdio_bus(phydev);
+	ret = __phy_package_write(phydev, MII_BCM54XX_RDB_ADDR, rdb);
+	if (ret < 0)
+		goto out;
+
+	ret = __phy_package_read(phydev, MII_BCM54XX_RDB_DATA);
+
+out:
+	phy_unlock_mdio_bus(phydev);
+	return ret;
+}
+
+static int bcm54140_base_write_rdb(struct phy_device *phydev,
+				   u16 rdb, u16 val)
+{
+	int ret;
+
+	phy_lock_mdio_bus(phydev);
+	ret = __phy_package_write(phydev, MII_BCM54XX_RDB_ADDR, rdb);
+	if (ret < 0)
+		goto out;
+
+	ret = __phy_package_write(phydev, MII_BCM54XX_RDB_DATA, val);
+
+out:
+	phy_unlock_mdio_bus(phydev);
+	return ret;
+}
+
+/* Under some circumstances a core PLL may not lock, this will then prevent
+ * a successful link establishment. Restart the PLL after the voltages are
+ * stable to workaround this issue.
+ */
+static int bcm54140_b0_workaround(struct phy_device *phydev)
+{
+	int spare3;
+	int ret;
+
+	spare3 = bcm_phy_read_rdb(phydev, BCM54140_RDB_SPARE3);
+	if (spare3 < 0)
+		return spare3;
+
+	spare3 &= ~BCM54140_RDB_SPARE3_BIT0;
+
+	ret = bcm_phy_write_rdb(phydev, BCM54140_RDB_SPARE3, spare3);
+	if (ret)
+		return ret;
+
+	ret = phy_modify(phydev, MII_BMCR, 0, BMCR_PDOWN);
+	if (ret)
+		return ret;
+
+	ret = phy_modify(phydev, MII_BMCR, BMCR_PDOWN, 0);
+	if (ret)
+		return ret;
+
+	spare3 |= BCM54140_RDB_SPARE3_BIT0;
+
+	return bcm_phy_write_rdb(phydev, BCM54140_RDB_SPARE3, spare3);
+}
+
+/* The BCM54140 is a quad PHY where only the first port has access to the
+ * global register. Thus we need to find out its PHY address.
+ *
+ */
+static int bcm54140_get_base_addr_and_port(struct phy_device *phydev)
+{
+	struct bcm54140_priv *priv = phydev->priv;
+	struct mii_bus *bus = phydev->mdio.bus;
+	int addr, min_addr, max_addr;
+	int step = 1;
+	u32 phy_id;
+	int tmp;
+
+	min_addr = phydev->mdio.addr;
+	max_addr = phydev->mdio.addr;
+	addr = phydev->mdio.addr;
+
+	/* We scan forward and backwards and look for PHYs which have the
+	 * same phy_id like we do. Step 1 will scan forward, step 2
+	 * backwards. Once we are finished, we have a min_addr and
+	 * max_addr which resembles the range of PHY addresses of the same
+	 * type of PHY. There is one caveat; there may be many PHYs of
+	 * the same type, but we know that each PHY takes exactly 4
+	 * consecutive addresses. Therefore we can deduce our offset
+	 * to the base address of this quad PHY.
+	 */
+
+	while (1) {
+		if (step == 3) {
+			break;
+		} else if (step == 1) {
+			max_addr = addr;
+			addr++;
+		} else {
+			min_addr = addr;
+			addr--;
+		}
+
+		if (addr < 0 || addr >= PHY_MAX_ADDR) {
+			addr = phydev->mdio.addr;
+			step++;
+			continue;
+		}
+
+		/* read the PHY id */
+		tmp = mdiobus_read(bus, addr, MII_PHYSID1);
+		if (tmp < 0)
+			return tmp;
+		phy_id = tmp << 16;
+		tmp = mdiobus_read(bus, addr, MII_PHYSID2);
+		if (tmp < 0)
+			return tmp;
+		phy_id |= tmp;
+
+		/* see if it is still the same PHY */
+		if ((phy_id & phydev->drv->phy_id_mask) !=
+		    (phydev->drv->phy_id & phydev->drv->phy_id_mask)) {
+			addr = phydev->mdio.addr;
+			step++;
+		}
+	}
+
+	/* The range we get should be a multiple of four. Please note that both
+	 * the min_addr and max_addr are inclusive. So we have to add one if we
+	 * subtract them.
+	 */
+	if ((max_addr - min_addr + 1) % 4) {
+		dev_err(&phydev->mdio.dev,
+			"Detected Quad PHY IDs %d..%d doesn't make sense.\n",
+			min_addr, max_addr);
+		return -EINVAL;
+	}
+
+	priv->port = (phydev->mdio.addr - min_addr) % 4;
+	priv->base_addr = phydev->mdio.addr - priv->port;
+
+	return 0;
+}
+
+static int bcm54140_probe(struct phy_device *phydev)
+{
+	struct bcm54140_priv *priv;
+	int ret;
+
+	priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	phydev->priv = priv;
+
+	ret = bcm54140_get_base_addr_and_port(phydev);
+	if (ret)
+		return ret;
+
+	devm_phy_package_join(&phydev->mdio.dev, phydev, priv->base_addr, 0);
+
+#if IS_ENABLED(CONFIG_HWMON)
+	mutex_init(&priv->alarm_lock);
+
+	if (phy_package_init_once(phydev)) {
+		ret = bcm54140_probe_once(phydev);
+		if (ret)
+			return ret;
+	}
+#endif
+
+	phydev_dbg(phydev, "probed (port %d, base PHY address %d)\n",
+		   priv->port, priv->base_addr);
+
+	return 0;
+}
+
+static int bcm54140_config_init(struct phy_device *phydev)
+{
+	u16 reg = 0xffff;
+	int ret;
+
+	/* Apply hardware errata */
+	if (BCM54140_PHY_ID_REV(phydev->phy_id) == BCM54140_REV_B0) {
+		ret = bcm54140_b0_workaround(phydev);
+		if (ret)
+			return ret;
+	}
+
+	/* Unmask events we are interested in. */
+	reg &= ~(BCM54140_RDB_INT_DUPLEX |
+		 BCM54140_RDB_INT_SPEED |
+		 BCM54140_RDB_INT_LINK);
+	ret = bcm_phy_write_rdb(phydev, BCM54140_RDB_IMR, reg);
+	if (ret)
+		return ret;
+
+	/* LED1=LINKSPD[1], LED2=LINKSPD[2], LED3=LINK/ACTIVITY */
+	ret = bcm_phy_modify_rdb(phydev, BCM54140_RDB_SPARE1,
+				 0, BCM54140_RDB_SPARE1_LSLM);
+	if (ret)
+		return ret;
+
+	ret = bcm_phy_modify_rdb(phydev, BCM54140_RDB_LED_CTRL,
+				 0, BCM54140_RDB_LED_CTRL_ACTLINK0);
+	if (ret)
+		return ret;
+
+	/* disable super isolate mode */
+	return bcm_phy_modify_rdb(phydev, BCM54140_RDB_C_PWR,
+				  BCM54140_RDB_C_PWR_ISOLATE, 0);
+}
+
+static irqreturn_t bcm54140_handle_interrupt(struct phy_device *phydev)
+{
+	int irq_status, irq_mask;
+
+	irq_status = bcm_phy_read_rdb(phydev, BCM54140_RDB_ISR);
+	if (irq_status < 0) {
+		phy_error(phydev);
+		return IRQ_NONE;
+	}
+
+	irq_mask = bcm_phy_read_rdb(phydev, BCM54140_RDB_IMR);
+	if (irq_mask < 0) {
+		phy_error(phydev);
+		return IRQ_NONE;
+	}
+	irq_mask = ~irq_mask;
+
+	if (!(irq_status & irq_mask))
+		return IRQ_NONE;
+
+	phy_trigger_machine(phydev);
+
+	return IRQ_HANDLED;
+}
+
+static int bcm54140_ack_intr(struct phy_device *phydev)
+{
+	int reg;
+
+	/* clear pending interrupts */
+	reg = bcm_phy_read_rdb(phydev, BCM54140_RDB_ISR);
+	if (reg < 0)
+		return reg;
+
+	return 0;
+}
+
+static int bcm54140_config_intr(struct phy_device *phydev)
+{
+	struct bcm54140_priv *priv = phydev->priv;
+	static const u16 port_to_imr_bit[] = {
+		BCM54140_RDB_TOP_IMR_PORT0, BCM54140_RDB_TOP_IMR_PORT1,
+		BCM54140_RDB_TOP_IMR_PORT2, BCM54140_RDB_TOP_IMR_PORT3,
+	};
+	int reg, err;
+
+	if (priv->port >= ARRAY_SIZE(port_to_imr_bit))
+		return -EINVAL;
+
+	reg = bcm54140_base_read_rdb(phydev, BCM54140_RDB_TOP_IMR);
+	if (reg < 0)
+		return reg;
+
+	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
+		err = bcm54140_ack_intr(phydev);
+		if (err)
+			return err;
+
+		reg &= ~port_to_imr_bit[priv->port];
+		err = bcm54140_base_write_rdb(phydev, BCM54140_RDB_TOP_IMR, reg);
+	} else {
+		reg |= port_to_imr_bit[priv->port];
+		err = bcm54140_base_write_rdb(phydev, BCM54140_RDB_TOP_IMR, reg);
+		if (err)
+			return err;
+
+		err = bcm54140_ack_intr(phydev);
+	}
+
+	return err;
+}
+
+static int bcm54140_get_downshift(struct phy_device *phydev, u8 *data)
+{
+	int val;
+
+	val = bcm_phy_read_rdb(phydev, BCM54140_RDB_C_MISC_CTRL);
+	if (val < 0)
+		return val;
+
+	if (!(val & BCM54140_RDB_C_MISC_CTRL_WS_EN)) {
+		*data = DOWNSHIFT_DEV_DISABLE;
+		return 0;
+	}
+
+	val = bcm_phy_read_rdb(phydev, BCM54140_RDB_SPARE2);
+	if (val < 0)
+		return val;
+
+	if (val & BCM54140_RDB_SPARE2_WS_RTRY_DIS)
+		*data = 1;
+	else
+		*data = FIELD_GET(BCM54140_RDB_SPARE2_WS_RTRY_LIMIT, val) + 2;
+
+	return 0;
+}
+
+static int bcm54140_set_downshift(struct phy_device *phydev, u8 cnt)
+{
+	u16 mask, set;
+	int ret;
+
+	if (cnt > BCM54140_MAX_DOWNSHIFT && cnt != DOWNSHIFT_DEV_DEFAULT_COUNT)
+		return -EINVAL;
+
+	if (!cnt)
+		return bcm_phy_modify_rdb(phydev, BCM54140_RDB_C_MISC_CTRL,
+					  BCM54140_RDB_C_MISC_CTRL_WS_EN, 0);
+
+	if (cnt == DOWNSHIFT_DEV_DEFAULT_COUNT)
+		cnt = BCM54140_DEFAULT_DOWNSHIFT;
+
+	if (cnt == 1) {
+		mask = 0;
+		set = BCM54140_RDB_SPARE2_WS_RTRY_DIS;
+	} else {
+		mask = BCM54140_RDB_SPARE2_WS_RTRY_DIS;
+		mask |= BCM54140_RDB_SPARE2_WS_RTRY_LIMIT;
+		set = FIELD_PREP(BCM54140_RDB_SPARE2_WS_RTRY_LIMIT, cnt - 2);
+	}
+	ret = bcm_phy_modify_rdb(phydev, BCM54140_RDB_SPARE2,
+				 mask, set);
+	if (ret)
+		return ret;
+
+	return bcm_phy_modify_rdb(phydev, BCM54140_RDB_C_MISC_CTRL,
+				  0, BCM54140_RDB_C_MISC_CTRL_WS_EN);
+}
+
+static int bcm54140_get_edpd(struct phy_device *phydev, u16 *tx_interval)
+{
+	int val;
+
+	val = bcm_phy_read_rdb(phydev, BCM54140_RDB_C_APWR);
+	if (val < 0)
+		return val;
+
+	switch (FIELD_GET(BCM54140_RDB_C_APWR_APD_MODE_MASK, val)) {
+	case BCM54140_RDB_C_APWR_APD_MODE_DIS:
+	case BCM54140_RDB_C_APWR_APD_MODE_DIS2:
+		*tx_interval = ETHTOOL_PHY_EDPD_DISABLE;
+		break;
+	case BCM54140_RDB_C_APWR_APD_MODE_EN:
+	case BCM54140_RDB_C_APWR_APD_MODE_EN_ANEG:
+		switch (FIELD_GET(BCM54140_RDB_C_APWR_SLP_TIM_MASK, val)) {
+		case BCM54140_RDB_C_APWR_SLP_TIM_2_7:
+			*tx_interval = 2700;
+			break;
+		case BCM54140_RDB_C_APWR_SLP_TIM_5_4:
+			*tx_interval = 5400;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static int bcm54140_set_edpd(struct phy_device *phydev, u16 tx_interval)
+{
+	u16 mask, set;
+
+	mask = BCM54140_RDB_C_APWR_APD_MODE_MASK;
+	if (tx_interval == ETHTOOL_PHY_EDPD_DISABLE)
+		set = FIELD_PREP(BCM54140_RDB_C_APWR_APD_MODE_MASK,
+				 BCM54140_RDB_C_APWR_APD_MODE_DIS);
+	else
+		set = FIELD_PREP(BCM54140_RDB_C_APWR_APD_MODE_MASK,
+				 BCM54140_RDB_C_APWR_APD_MODE_EN_ANEG);
+
+	/* enable single pulse mode */
+	set |= BCM54140_RDB_C_APWR_SINGLE_PULSE;
+
+	/* set sleep timer */
+	mask |= BCM54140_RDB_C_APWR_SLP_TIM_MASK;
+	switch (tx_interval) {
+	case ETHTOOL_PHY_EDPD_DFLT_TX_MSECS:
+	case ETHTOOL_PHY_EDPD_DISABLE:
+	case 2700:
+		set |= BCM54140_RDB_C_APWR_SLP_TIM_2_7;
+		break;
+	case 5400:
+		set |= BCM54140_RDB_C_APWR_SLP_TIM_5_4;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return bcm_phy_modify_rdb(phydev, BCM54140_RDB_C_APWR, mask, set);
+}
+
+static int bcm54140_get_tunable(struct phy_device *phydev,
+				struct ethtool_tunable *tuna, void *data)
+{
+	switch (tuna->id) {
+	case ETHTOOL_PHY_DOWNSHIFT:
+		return bcm54140_get_downshift(phydev, data);
+	case ETHTOOL_PHY_EDPD:
+		return bcm54140_get_edpd(phydev, data);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int bcm54140_set_tunable(struct phy_device *phydev,
+				struct ethtool_tunable *tuna, const void *data)
+{
+	switch (tuna->id) {
+	case ETHTOOL_PHY_DOWNSHIFT:
+		return bcm54140_set_downshift(phydev, *(const u8 *)data);
+	case ETHTOOL_PHY_EDPD:
+		return bcm54140_set_edpd(phydev, *(const u16 *)data);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static struct phy_driver bcm54140_drivers[] = {
+	{
+		.phy_id         = PHY_ID_BCM54140,
+		.phy_id_mask    = BCM54140_PHY_ID_MASK,
+		.name           = "Broadcom BCM54140",
+		.flags		= PHY_POLL_CABLE_TEST,
+		.features       = PHY_GBIT_FEATURES,
+		.config_init    = bcm54140_config_init,
+		.handle_interrupt = bcm54140_handle_interrupt,
+		.config_intr    = bcm54140_config_intr,
+		.probe		= bcm54140_probe,
+		.suspend	= genphy_suspend,
+		.resume		= genphy_resume,
+		.soft_reset	= genphy_soft_reset,
+		.get_tunable	= bcm54140_get_tunable,
+		.set_tunable	= bcm54140_set_tunable,
+		.cable_test_start = bcm_phy_cable_test_start_rdb,
+		.cable_test_get_status = bcm_phy_cable_test_get_status_rdb,
+	},
+};
+module_phy_driver(bcm54140_drivers);
+
+static struct mdio_device_id __maybe_unused bcm54140_tbl[] = {
+	{ PHY_ID_BCM54140, BCM54140_PHY_ID_MASK },
+	{ }
+};
+
+MODULE_AUTHOR("Michael Walle");
+MODULE_DESCRIPTION("Broadcom BCM54140 PHY driver");
+MODULE_DEVICE_TABLE(mdio, bcm54140_tbl);
+MODULE_LICENSE("GPL");