From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- drivers/greybus/core.c | 349 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 349 insertions(+) create mode 100644 drivers/greybus/core.c (limited to 'drivers/greybus/core.c') diff --git a/drivers/greybus/core.c b/drivers/greybus/core.c new file mode 100644 index 000000000..e546c6431 --- /dev/null +++ b/drivers/greybus/core.c @@ -0,0 +1,349 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Greybus "Core" + * + * Copyright 2014-2015 Google Inc. + * Copyright 2014-2015 Linaro Ltd. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#define CREATE_TRACE_POINTS +#include +#include "greybus_trace.h" + +#define GB_BUNDLE_AUTOSUSPEND_MS 3000 + +/* Allow greybus to be disabled at boot if needed */ +static bool nogreybus; +#ifdef MODULE +module_param(nogreybus, bool, 0444); +#else +core_param(nogreybus, nogreybus, bool, 0444); +#endif +int greybus_disabled(void) +{ + return nogreybus; +} +EXPORT_SYMBOL_GPL(greybus_disabled); + +static bool greybus_match_one_id(struct gb_bundle *bundle, + const struct greybus_bundle_id *id) +{ + if ((id->match_flags & GREYBUS_ID_MATCH_VENDOR) && + (id->vendor != bundle->intf->vendor_id)) + return false; + + if ((id->match_flags & GREYBUS_ID_MATCH_PRODUCT) && + (id->product != bundle->intf->product_id)) + return false; + + if ((id->match_flags & GREYBUS_ID_MATCH_CLASS) && + (id->class != bundle->class)) + return false; + + return true; +} + +static const struct greybus_bundle_id * +greybus_match_id(struct gb_bundle *bundle, const struct greybus_bundle_id *id) +{ + if (!id) + return NULL; + + for (; id->vendor || id->product || id->class || id->driver_info; + id++) { + if (greybus_match_one_id(bundle, id)) + return id; + } + + return NULL; +} + +static int greybus_match_device(struct device *dev, struct device_driver *drv) +{ + struct greybus_driver *driver = to_greybus_driver(drv); + struct gb_bundle *bundle; + const struct greybus_bundle_id *id; + + if (!is_gb_bundle(dev)) + return 0; + + bundle = to_gb_bundle(dev); + + id = greybus_match_id(bundle, driver->id_table); + if (id) + return 1; + /* FIXME - Dynamic ids? */ + return 0; +} + +static int greybus_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct gb_host_device *hd; + struct gb_module *module = NULL; + struct gb_interface *intf = NULL; + struct gb_control *control = NULL; + struct gb_bundle *bundle = NULL; + struct gb_svc *svc = NULL; + + if (is_gb_host_device(dev)) { + hd = to_gb_host_device(dev); + } else if (is_gb_module(dev)) { + module = to_gb_module(dev); + hd = module->hd; + } else if (is_gb_interface(dev)) { + intf = to_gb_interface(dev); + module = intf->module; + hd = intf->hd; + } else if (is_gb_control(dev)) { + control = to_gb_control(dev); + intf = control->intf; + module = intf->module; + hd = intf->hd; + } else if (is_gb_bundle(dev)) { + bundle = to_gb_bundle(dev); + intf = bundle->intf; + module = intf->module; + hd = intf->hd; + } else if (is_gb_svc(dev)) { + svc = to_gb_svc(dev); + hd = svc->hd; + } else { + dev_WARN(dev, "uevent for unknown greybus device \"type\"!\n"); + return -EINVAL; + } + + if (add_uevent_var(env, "BUS=%u", hd->bus_id)) + return -ENOMEM; + + if (module) { + if (add_uevent_var(env, "MODULE=%u", module->module_id)) + return -ENOMEM; + } + + if (intf) { + if (add_uevent_var(env, "INTERFACE=%u", intf->interface_id)) + return -ENOMEM; + if (add_uevent_var(env, "GREYBUS_ID=%08x/%08x", + intf->vendor_id, intf->product_id)) + return -ENOMEM; + } + + if (bundle) { + // FIXME + // add a uevent that can "load" a bundle type + // This is what we need to bind a driver to so use the info + // in gmod here as well + + if (add_uevent_var(env, "BUNDLE=%u", bundle->id)) + return -ENOMEM; + if (add_uevent_var(env, "BUNDLE_CLASS=%02x", bundle->class)) + return -ENOMEM; + } + + return 0; +} + +static void greybus_shutdown(struct device *dev) +{ + if (is_gb_host_device(dev)) { + struct gb_host_device *hd; + + hd = to_gb_host_device(dev); + gb_hd_shutdown(hd); + } +} + +struct bus_type greybus_bus_type = { + .name = "greybus", + .match = greybus_match_device, + .uevent = greybus_uevent, + .shutdown = greybus_shutdown, +}; + +static int greybus_probe(struct device *dev) +{ + struct greybus_driver *driver = to_greybus_driver(dev->driver); + struct gb_bundle *bundle = to_gb_bundle(dev); + const struct greybus_bundle_id *id; + int retval; + + /* match id */ + id = greybus_match_id(bundle, driver->id_table); + if (!id) + return -ENODEV; + + retval = pm_runtime_get_sync(&bundle->intf->dev); + if (retval < 0) { + pm_runtime_put_noidle(&bundle->intf->dev); + return retval; + } + + retval = gb_control_bundle_activate(bundle->intf->control, bundle->id); + if (retval) { + pm_runtime_put(&bundle->intf->dev); + return retval; + } + + /* + * Unbound bundle devices are always deactivated. During probe, the + * Runtime PM is set to enabled and active and the usage count is + * incremented. If the driver supports runtime PM, it should call + * pm_runtime_put() in its probe routine and pm_runtime_get_sync() + * in remove routine. + */ + pm_runtime_set_autosuspend_delay(dev, GB_BUNDLE_AUTOSUSPEND_MS); + pm_runtime_use_autosuspend(dev); + pm_runtime_get_noresume(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + retval = driver->probe(bundle, id); + if (retval) { + /* + * Catch buggy drivers that fail to destroy their connections. + */ + WARN_ON(!list_empty(&bundle->connections)); + + gb_control_bundle_deactivate(bundle->intf->control, bundle->id); + + pm_runtime_disable(dev); + pm_runtime_set_suspended(dev); + pm_runtime_put_noidle(dev); + pm_runtime_dont_use_autosuspend(dev); + pm_runtime_put(&bundle->intf->dev); + + return retval; + } + + pm_runtime_put(&bundle->intf->dev); + + return 0; +} + +static int greybus_remove(struct device *dev) +{ + struct greybus_driver *driver = to_greybus_driver(dev->driver); + struct gb_bundle *bundle = to_gb_bundle(dev); + struct gb_connection *connection; + int retval; + + retval = pm_runtime_get_sync(dev); + if (retval < 0) + dev_err(dev, "failed to resume bundle: %d\n", retval); + + /* + * Disable (non-offloaded) connections early in case the interface is + * already gone to avoid unceccessary operation timeouts during + * driver disconnect. Otherwise, only disable incoming requests. + */ + list_for_each_entry(connection, &bundle->connections, bundle_links) { + if (gb_connection_is_offloaded(connection)) + continue; + + if (bundle->intf->disconnected) + gb_connection_disable_forced(connection); + else + gb_connection_disable_rx(connection); + } + + driver->disconnect(bundle); + + /* Catch buggy drivers that fail to destroy their connections. */ + WARN_ON(!list_empty(&bundle->connections)); + + if (!bundle->intf->disconnected) + gb_control_bundle_deactivate(bundle->intf->control, bundle->id); + + pm_runtime_put_noidle(dev); + pm_runtime_disable(dev); + pm_runtime_set_suspended(dev); + pm_runtime_dont_use_autosuspend(dev); + pm_runtime_put_noidle(dev); + + return 0; +} + +int greybus_register_driver(struct greybus_driver *driver, struct module *owner, + const char *mod_name) +{ + int retval; + + if (greybus_disabled()) + return -ENODEV; + + driver->driver.bus = &greybus_bus_type; + driver->driver.name = driver->name; + driver->driver.probe = greybus_probe; + driver->driver.remove = greybus_remove; + driver->driver.owner = owner; + driver->driver.mod_name = mod_name; + + retval = driver_register(&driver->driver); + if (retval) + return retval; + + pr_info("registered new driver %s\n", driver->name); + return 0; +} +EXPORT_SYMBOL_GPL(greybus_register_driver); + +void greybus_deregister_driver(struct greybus_driver *driver) +{ + driver_unregister(&driver->driver); +} +EXPORT_SYMBOL_GPL(greybus_deregister_driver); + +static int __init gb_init(void) +{ + int retval; + + if (greybus_disabled()) + return -ENODEV; + + BUILD_BUG_ON(CPORT_ID_MAX >= (long)CPORT_ID_BAD); + + gb_debugfs_init(); + + retval = bus_register(&greybus_bus_type); + if (retval) { + pr_err("bus_register failed (%d)\n", retval); + goto error_bus; + } + + retval = gb_hd_init(); + if (retval) { + pr_err("gb_hd_init failed (%d)\n", retval); + goto error_hd; + } + + retval = gb_operation_init(); + if (retval) { + pr_err("gb_operation_init failed (%d)\n", retval); + goto error_operation; + } + return 0; /* Success */ + +error_operation: + gb_hd_exit(); +error_hd: + bus_unregister(&greybus_bus_type); +error_bus: + gb_debugfs_cleanup(); + + return retval; +} +module_init(gb_init); + +static void __exit gb_exit(void) +{ + gb_operation_exit(); + gb_hd_exit(); + bus_unregister(&greybus_bus_type); + gb_debugfs_cleanup(); + tracepoint_synchronize_unregister(); +} +module_exit(gb_exit); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Greg Kroah-Hartman "); -- cgit v1.2.3