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, 708 insertions, 0 deletions

diff --git a/drivers/usb/typec/pd.c b/drivers/usb/typec/pd.c
new file mode 100644
index 000000000..dc72005d6
--- /dev/null
+++ b/drivers/usb/typec/pd.c
@@ -0,0 +1,708 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * USB Power Delivery sysfs entries
+ *
+ * Copyright (C) 2022, Intel Corporation
+ * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
+ */
+
+#include <linux/slab.h>
+#include <linux/usb/pd.h>
+
+#include "pd.h"
+
+static DEFINE_IDA(pd_ida);
+
+static struct class pd_class = {
+	.name = "usb_power_delivery",
+	.owner = THIS_MODULE,
+};
+
+#define to_pdo(o) container_of(o, struct pdo, dev)
+
+struct pdo {
+	struct device dev;
+	int object_position;
+	u32 pdo;
+};
+
+static void pdo_release(struct device *dev)
+{
+	kfree(to_pdo(dev));
+}
+
+/* -------------------------------------------------------------------------- */
+/* Fixed Supply */
+
+static ssize_t
+dual_role_power_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%u\n", !!(to_pdo(dev)->pdo & PDO_FIXED_DUAL_ROLE));
+}
+static DEVICE_ATTR_RO(dual_role_power);
+
+static ssize_t
+usb_suspend_supported_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%u\n", !!(to_pdo(dev)->pdo & PDO_FIXED_SUSPEND));
+}
+static DEVICE_ATTR_RO(usb_suspend_supported);
+
+static ssize_t
+unconstrained_power_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%u\n", !!(to_pdo(dev)->pdo & PDO_FIXED_EXTPOWER));
+}
+static DEVICE_ATTR_RO(unconstrained_power);
+
+static ssize_t
+usb_communication_capable_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%u\n", !!(to_pdo(dev)->pdo & PDO_FIXED_USB_COMM));
+}
+static DEVICE_ATTR_RO(usb_communication_capable);
+
+static ssize_t
+dual_role_data_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%u\n", !!(to_pdo(dev)->pdo & PDO_FIXED_DATA_SWAP));
+}
+static DEVICE_ATTR_RO(dual_role_data);
+
+static ssize_t
+unchunked_extended_messages_supported_show(struct device *dev,
+					   struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%u\n", !!(to_pdo(dev)->pdo & PDO_FIXED_UNCHUNK_EXT));
+}
+static DEVICE_ATTR_RO(unchunked_extended_messages_supported);
+
+/*
+ * REVISIT: Peak Current requires access also to the RDO.
+static ssize_t
+peak_current_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	...
+}
+*/
+
+static ssize_t
+fast_role_swap_current_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%u\n", to_pdo(dev)->pdo >> PDO_FIXED_FRS_CURR_SHIFT) & 3;
+}
+static DEVICE_ATTR_RO(fast_role_swap_current);
+
+static ssize_t voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%umV\n", pdo_fixed_voltage(to_pdo(dev)->pdo));
+}
+static DEVICE_ATTR_RO(voltage);
+
+/* Shared with Variable supplies, both source and sink */
+static ssize_t current_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%umA\n", pdo_max_current(to_pdo(dev)->pdo));
+}
+
+/* Shared with Variable type supplies */
+static struct device_attribute maximum_current_attr = {
+	.attr = {
+		.name = "maximum_current",
+		.mode = 0444,
+	},
+	.show = current_show,
+};
+
+static struct device_attribute operational_current_attr = {
+	.attr = {
+		.name = "operational_current",
+		.mode = 0444,
+	},
+	.show = current_show,
+};
+
+static struct attribute *source_fixed_supply_attrs[] = {
+	&dev_attr_dual_role_power.attr,
+	&dev_attr_usb_suspend_supported.attr,
+	&dev_attr_unconstrained_power.attr,
+	&dev_attr_usb_communication_capable.attr,
+	&dev_attr_dual_role_data.attr,
+	&dev_attr_unchunked_extended_messages_supported.attr,
+	/*&dev_attr_peak_current.attr,*/
+	&dev_attr_voltage.attr,
+	&maximum_current_attr.attr,
+	NULL
+};
+
+static umode_t fixed_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n)
+{
+	if (to_pdo(kobj_to_dev(kobj))->object_position &&
+	    /*attr != &dev_attr_peak_current.attr &&*/
+	    attr != &dev_attr_voltage.attr &&
+	    attr != &maximum_current_attr.attr &&
+	    attr != &operational_current_attr.attr)
+		return 0;
+
+	return attr->mode;
+}
+
+static const struct attribute_group source_fixed_supply_group = {
+	.is_visible = fixed_attr_is_visible,
+	.attrs = source_fixed_supply_attrs,
+};
+__ATTRIBUTE_GROUPS(source_fixed_supply);
+
+static struct device_type source_fixed_supply_type = {
+	.name = "pdo",
+	.release = pdo_release,
+	.groups = source_fixed_supply_groups,
+};
+
+static struct attribute *sink_fixed_supply_attrs[] = {
+	&dev_attr_dual_role_power.attr,
+	&dev_attr_usb_suspend_supported.attr,
+	&dev_attr_unconstrained_power.attr,
+	&dev_attr_usb_communication_capable.attr,
+	&dev_attr_dual_role_data.attr,
+	&dev_attr_unchunked_extended_messages_supported.attr,
+	&dev_attr_fast_role_swap_current.attr,
+	&dev_attr_voltage.attr,
+	&operational_current_attr.attr,
+	NULL
+};
+
+static const struct attribute_group sink_fixed_supply_group = {
+	.is_visible = fixed_attr_is_visible,
+	.attrs = sink_fixed_supply_attrs,
+};
+__ATTRIBUTE_GROUPS(sink_fixed_supply);
+
+static struct device_type sink_fixed_supply_type = {
+	.name = "pdo",
+	.release = pdo_release,
+	.groups = sink_fixed_supply_groups,
+};
+
+/* -------------------------------------------------------------------------- */
+/* Variable Supply */
+
+static ssize_t
+maximum_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%umV\n", pdo_max_voltage(to_pdo(dev)->pdo));
+}
+static DEVICE_ATTR_RO(maximum_voltage);
+
+static ssize_t
+minimum_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%umV\n", pdo_min_voltage(to_pdo(dev)->pdo));
+}
+static DEVICE_ATTR_RO(minimum_voltage);
+
+static struct attribute *source_variable_supply_attrs[] = {
+	&dev_attr_maximum_voltage.attr,
+	&dev_attr_minimum_voltage.attr,
+	&maximum_current_attr.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(source_variable_supply);
+
+static struct device_type source_variable_supply_type = {
+	.name = "pdo",
+	.release = pdo_release,
+	.groups = source_variable_supply_groups,
+};
+
+static struct attribute *sink_variable_supply_attrs[] = {
+	&dev_attr_maximum_voltage.attr,
+	&dev_attr_minimum_voltage.attr,
+	&operational_current_attr.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(sink_variable_supply);
+
+static struct device_type sink_variable_supply_type = {
+	.name = "pdo",
+	.release = pdo_release,
+	.groups = sink_variable_supply_groups,
+};
+
+/* -------------------------------------------------------------------------- */
+/* Battery */
+
+static ssize_t
+maximum_power_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%umW\n", pdo_max_power(to_pdo(dev)->pdo));
+}
+static DEVICE_ATTR_RO(maximum_power);
+
+static ssize_t
+operational_power_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%umW\n", pdo_max_power(to_pdo(dev)->pdo));
+}
+static DEVICE_ATTR_RO(operational_power);
+
+static struct attribute *source_battery_attrs[] = {
+	&dev_attr_maximum_voltage.attr,
+	&dev_attr_minimum_voltage.attr,
+	&dev_attr_maximum_power.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(source_battery);
+
+static struct device_type source_battery_type = {
+	.name = "pdo",
+	.release = pdo_release,
+	.groups = source_battery_groups,
+};
+
+static struct attribute *sink_battery_attrs[] = {
+	&dev_attr_maximum_voltage.attr,
+	&dev_attr_minimum_voltage.attr,
+	&dev_attr_operational_power.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(sink_battery);
+
+static struct device_type sink_battery_type = {
+	.name = "pdo",
+	.release = pdo_release,
+	.groups = sink_battery_groups,
+};
+
+/* -------------------------------------------------------------------------- */
+/* Standard Power Range (SPR) Programmable Power Supply (PPS) */
+
+static ssize_t
+pps_power_limited_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%u\n", !!(to_pdo(dev)->pdo & BIT(27)));
+}
+static DEVICE_ATTR_RO(pps_power_limited);
+
+static ssize_t
+pps_max_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%umV\n", pdo_pps_apdo_max_voltage(to_pdo(dev)->pdo));
+}
+
+static ssize_t
+pps_min_voltage_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%umV\n", pdo_pps_apdo_min_voltage(to_pdo(dev)->pdo));
+}
+
+static ssize_t
+pps_max_current_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	return sysfs_emit(buf, "%umA\n", pdo_pps_apdo_max_current(to_pdo(dev)->pdo));
+}
+
+static struct device_attribute pps_max_voltage_attr = {
+	.attr = {
+		.name = "maximum_voltage",
+		.mode = 0444,
+	},
+	.show = pps_max_voltage_show,
+};
+
+static struct device_attribute pps_min_voltage_attr = {
+	.attr = {
+		.name = "minimum_voltage",
+		.mode = 0444,
+	},
+	.show = pps_min_voltage_show,
+};
+
+static struct device_attribute pps_max_current_attr = {
+	.attr = {
+		.name = "maximum_current",
+		.mode = 0444,
+	},
+	.show = pps_max_current_show,
+};
+
+static struct attribute *source_pps_attrs[] = {
+	&dev_attr_pps_power_limited.attr,
+	&pps_max_voltage_attr.attr,
+	&pps_min_voltage_attr.attr,
+	&pps_max_current_attr.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(source_pps);
+
+static struct device_type source_pps_type = {
+	.name = "pdo",
+	.release = pdo_release,
+	.groups = source_pps_groups,
+};
+
+static struct attribute *sink_pps_attrs[] = {
+	&pps_max_voltage_attr.attr,
+	&pps_min_voltage_attr.attr,
+	&pps_max_current_attr.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(sink_pps);
+
+static struct device_type sink_pps_type = {
+	.name = "pdo",
+	.release = pdo_release,
+	.groups = sink_pps_groups,
+};
+
+/* -------------------------------------------------------------------------- */
+
+static const char * const supply_name[] = {
+	[PDO_TYPE_FIXED] = "fixed_supply",
+	[PDO_TYPE_BATT]  = "battery",
+	[PDO_TYPE_VAR]	 = "variable_supply",
+};
+
+static const char * const apdo_supply_name[] = {
+	[APDO_TYPE_PPS]  = "programmable_supply",
+};
+
+static struct device_type *source_type[] = {
+	[PDO_TYPE_FIXED] = &source_fixed_supply_type,
+	[PDO_TYPE_BATT]  = &source_battery_type,
+	[PDO_TYPE_VAR]   = &source_variable_supply_type,
+};
+
+static struct device_type *source_apdo_type[] = {
+	[APDO_TYPE_PPS]  = &source_pps_type,
+};
+
+static struct device_type *sink_type[] = {
+	[PDO_TYPE_FIXED] = &sink_fixed_supply_type,
+	[PDO_TYPE_BATT]  = &sink_battery_type,
+	[PDO_TYPE_VAR]   = &sink_variable_supply_type,
+};
+
+static struct device_type *sink_apdo_type[] = {
+	[APDO_TYPE_PPS]  = &sink_pps_type,
+};
+
+/* REVISIT: Export when EPR_*_Capabilities need to be supported. */
+static int add_pdo(struct usb_power_delivery_capabilities *cap, u32 pdo, int position)
+{
+	struct device_type *type;
+	const char *name;
+	struct pdo *p;
+	int ret;
+
+	p = kzalloc(sizeof(*p), GFP_KERNEL);
+	if (!p)
+		return -ENOMEM;
+
+	p->pdo = pdo;
+	p->object_position = position;
+
+	if (pdo_type(pdo) == PDO_TYPE_APDO) {
+		/* FIXME: Only PPS supported for now! Skipping others. */
+		if (pdo_apdo_type(pdo) > APDO_TYPE_PPS) {
+			dev_warn(&cap->dev, "Unknown APDO type. PDO 0x%08x\n", pdo);
+			kfree(p);
+			return 0;
+		}
+
+		if (is_source(cap->role))
+			type = source_apdo_type[pdo_apdo_type(pdo)];
+		else
+			type = sink_apdo_type[pdo_apdo_type(pdo)];
+
+		name = apdo_supply_name[pdo_apdo_type(pdo)];
+	} else {
+		if (is_source(cap->role))
+			type = source_type[pdo_type(pdo)];
+		else
+			type = sink_type[pdo_type(pdo)];
+
+		name = supply_name[pdo_type(pdo)];
+	}
+
+	p->dev.parent = &cap->dev;
+	p->dev.type = type;
+	dev_set_name(&p->dev, "%u:%s", position + 1, name);
+
+	ret = device_register(&p->dev);
+	if (ret) {
+		put_device(&p->dev);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int remove_pdo(struct device *dev, void *data)
+{
+	device_unregister(dev);
+	return 0;
+}
+
+/* -------------------------------------------------------------------------- */
+
+static const char * const cap_name[] = {
+	[TYPEC_SINK]    = "sink-capabilities",
+	[TYPEC_SOURCE]  = "source-capabilities",
+};
+
+static void pd_capabilities_release(struct device *dev)
+{
+	kfree(to_usb_power_delivery_capabilities(dev));
+}
+
+static struct device_type pd_capabilities_type = {
+	.name = "capabilities",
+	.release = pd_capabilities_release,
+};
+
+/**
+ * usb_power_delivery_register_capabilities - Register a set of capabilities.
+ * @pd: The USB PD instance that the capabilities belong to.
+ * @desc: Description of the Capablities Message.
+ *
+ * This function registers a Capabilities Message described in @desc. The
+ * capabilities will have their own sub-directory under @pd in sysfs.
+ *
+ * The function returns pointer to struct usb_power_delivery_capabilities, or
+ * ERR_PRT(errno).
+ */
+struct usb_power_delivery_capabilities *
+usb_power_delivery_register_capabilities(struct usb_power_delivery *pd,
+					 struct usb_power_delivery_capabilities_desc *desc)
+{
+	struct usb_power_delivery_capabilities *cap;
+	int ret;
+	int i;
+
+	cap = kzalloc(sizeof(*cap), GFP_KERNEL);
+	if (!cap)
+		return ERR_PTR(-ENOMEM);
+
+	cap->pd = pd;
+	cap->role = desc->role;
+
+	cap->dev.parent = &pd->dev;
+	cap->dev.type = &pd_capabilities_type;
+	dev_set_name(&cap->dev, "%s", cap_name[cap->role]);
+
+	ret = device_register(&cap->dev);
+	if (ret) {
+		put_device(&cap->dev);
+		return ERR_PTR(ret);
+	}
+
+	for (i = 0; i < PDO_MAX_OBJECTS && desc->pdo[i]; i++) {
+		ret = add_pdo(cap, desc->pdo[i], i);
+		if (ret) {
+			usb_power_delivery_unregister_capabilities(cap);
+			return ERR_PTR(ret);
+		}
+	}
+
+	return cap;
+}
+EXPORT_SYMBOL_GPL(usb_power_delivery_register_capabilities);
+
+/**
+ * usb_power_delivery_unregister_capabilities - Unregister a set of capabilities
+ * @cap: The capabilities
+ */
+void usb_power_delivery_unregister_capabilities(struct usb_power_delivery_capabilities *cap)
+{
+	if (!cap)
+		return;
+
+	device_for_each_child(&cap->dev, NULL, remove_pdo);
+	device_unregister(&cap->dev);
+}
+EXPORT_SYMBOL_GPL(usb_power_delivery_unregister_capabilities);
+
+/* -------------------------------------------------------------------------- */
+
+static ssize_t revision_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct usb_power_delivery *pd = to_usb_power_delivery(dev);
+
+	return sysfs_emit(buf, "%u.%u\n", (pd->revision >> 8) & 0xff, (pd->revision >> 4) & 0xf);
+}
+static DEVICE_ATTR_RO(revision);
+
+static ssize_t version_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct usb_power_delivery *pd = to_usb_power_delivery(dev);
+
+	return sysfs_emit(buf, "%u.%u\n", (pd->version >> 8) & 0xff, (pd->version >> 4) & 0xf);
+}
+static DEVICE_ATTR_RO(version);
+
+static struct attribute *pd_attrs[] = {
+	&dev_attr_revision.attr,
+	&dev_attr_version.attr,
+	NULL
+};
+
+static umode_t pd_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n)
+{
+	struct usb_power_delivery *pd = to_usb_power_delivery(kobj_to_dev(kobj));
+
+	if (attr == &dev_attr_version.attr && !pd->version)
+		return 0;
+
+	return attr->mode;
+}
+
+static const struct attribute_group pd_group = {
+	.is_visible = pd_attr_is_visible,
+	.attrs = pd_attrs,
+};
+__ATTRIBUTE_GROUPS(pd);
+
+static void pd_release(struct device *dev)
+{
+	struct usb_power_delivery *pd = to_usb_power_delivery(dev);
+
+	ida_simple_remove(&pd_ida, pd->id);
+	kfree(pd);
+}
+
+static struct device_type pd_type = {
+	.name = "usb_power_delivery",
+	.release = pd_release,
+	.groups = pd_groups,
+};
+
+struct usb_power_delivery *usb_power_delivery_find(const char *name)
+{
+	struct device *dev;
+
+	dev = class_find_device_by_name(&pd_class, name);
+
+	return dev ? to_usb_power_delivery(dev) : NULL;
+}
+
+/**
+ * usb_power_delivery_register - Register USB Power Delivery Support.
+ * @parent: Parent device.
+ * @desc: Description of the USB PD contract.
+ *
+ * This routine can be used to register USB Power Delivery capabilities that a
+ * device or devices can support. These capabilities represent all the
+ * capabilities that can be negotiated with a partner, so not only the Power
+ * Capabilities that are negotiated using the USB PD Capabilities Message.
+ *
+ * The USB Power Delivery Support object that this routine generates can be used
+ * as the parent object for all the actual USB Power Delivery Messages and
+ * objects that can be negotiated with the partner.
+ *
+ * Returns handle to struct usb_power_delivery or ERR_PTR.
+ */
+struct usb_power_delivery *
+usb_power_delivery_register(struct device *parent, struct usb_power_delivery_desc *desc)
+{
+	struct usb_power_delivery *pd;
+	int ret;
+
+	pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+	if (!pd)
+		return ERR_PTR(-ENOMEM);
+
+	ret = ida_simple_get(&pd_ida, 0, 0, GFP_KERNEL);
+	if (ret < 0) {
+		kfree(pd);
+		return ERR_PTR(ret);
+	}
+
+	pd->id = ret;
+	pd->revision = desc->revision;
+	pd->version = desc->version;
+
+	pd->dev.parent = parent;
+	pd->dev.type = &pd_type;
+	pd->dev.class = &pd_class;
+	dev_set_name(&pd->dev, "pd%d", pd->id);
+
+	ret = device_register(&pd->dev);
+	if (ret) {
+		put_device(&pd->dev);
+		return ERR_PTR(ret);
+	}
+
+	return pd;
+}
+EXPORT_SYMBOL_GPL(usb_power_delivery_register);
+
+/**
+ * usb_power_delivery_unregister - Unregister USB Power Delivery Support.
+ * @pd: The USB PD contract.
+ */
+void usb_power_delivery_unregister(struct usb_power_delivery *pd)
+{
+	if (IS_ERR_OR_NULL(pd))
+		return;
+
+	device_unregister(&pd->dev);
+}
+EXPORT_SYMBOL_GPL(usb_power_delivery_unregister);
+
+/**
+ * usb_power_delivery_link_device - Link device to its USB PD object.
+ * @pd: The USB PD instance.
+ * @dev: The device.
+ *
+ * This function can be used to create a symlink named "usb_power_delivery" for
+ * @dev that points to @pd.
+ */
+int usb_power_delivery_link_device(struct usb_power_delivery *pd, struct device *dev)
+{
+	int ret;
+
+	if (IS_ERR_OR_NULL(pd) || !dev)
+		return 0;
+
+	ret = sysfs_create_link(&dev->kobj, &pd->dev.kobj, "usb_power_delivery");
+	if (ret)
+		return ret;
+
+	get_device(&pd->dev);
+	get_device(dev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(usb_power_delivery_link_device);
+
+/**
+ * usb_power_delivery_unlink_device - Unlink device from its USB PD object.
+ * @pd: The USB PD instance.
+ * @dev: The device.
+ *
+ * Remove the symlink that was previously created with pd_link_device().
+ */
+void usb_power_delivery_unlink_device(struct usb_power_delivery *pd, struct device *dev)
+{
+	if (IS_ERR_OR_NULL(pd) || !dev)
+		return;
+
+	sysfs_remove_link(&dev->kobj, "usb_power_delivery");
+	put_device(&pd->dev);
+	put_device(dev);
+}
+EXPORT_SYMBOL_GPL(usb_power_delivery_unlink_device);
+
+/* -------------------------------------------------------------------------- */
+
+int __init usb_power_delivery_init(void)
+{
+	return class_register(&pd_class);
+}
+
+void __exit usb_power_delivery_exit(void)
+{
+	ida_destroy(&pd_ida);
+	class_unregister(&pd_class);
+}