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/net/ipa/ipa_uc.c | 261 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 261 insertions(+) create mode 100644 drivers/net/ipa/ipa_uc.c (limited to 'drivers/net/ipa/ipa_uc.c') diff --git a/drivers/net/ipa/ipa_uc.c b/drivers/net/ipa/ipa_uc.c new file mode 100644 index 000000000..7eaa0b4eb --- /dev/null +++ b/drivers/net/ipa/ipa_uc.c @@ -0,0 +1,261 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. + * Copyright (C) 2018-2022 Linaro Ltd. + */ + +#include +#include +#include +#include + +#include "ipa.h" +#include "ipa_uc.h" +#include "ipa_power.h" + +/** + * DOC: The IPA embedded microcontroller + * + * The IPA incorporates a microcontroller that is able to do some additional + * handling/offloading of network activity. The current code makes + * essentially no use of the microcontroller, but it still requires some + * initialization. It needs to be notified in the event the AP crashes. + * + * The microcontroller can generate two interrupts to the AP. One interrupt + * is used to indicate that a response to a request from the AP is available. + * The other is used to notify the AP of the occurrence of an event. In + * addition, the AP can interrupt the microcontroller by writing a register. + * + * A 128 byte block of structured memory within the IPA SRAM is used together + * with these interrupts to implement the communication interface between the + * AP and the IPA microcontroller. Each side writes data to the shared area + * before interrupting its peer, which will read the written data in response + * to the interrupt. Some information found in the shared area is currently + * unused. All remaining space in the shared area is reserved, and must not + * be read or written by the AP. + */ +/* Supports hardware interface version 0x2000 */ + +/* Delay to allow a the microcontroller to save state when crashing */ +#define IPA_SEND_DELAY 100 /* microseconds */ + +/** + * struct ipa_uc_mem_area - AP/microcontroller shared memory area + * @command: command code (AP->microcontroller) + * @reserved0: reserved bytes; avoid reading or writing + * @command_param: low 32 bits of command parameter (AP->microcontroller) + * @command_param_hi: high 32 bits of command parameter (AP->microcontroller) + * + * @response: response code (microcontroller->AP) + * @reserved1: reserved bytes; avoid reading or writing + * @response_param: response parameter (microcontroller->AP) + * + * @event: event code (microcontroller->AP) + * @reserved2: reserved bytes; avoid reading or writing + * @event_param: event parameter (microcontroller->AP) + * + * @first_error_address: address of first error-source on SNOC + * @hw_state: state of hardware (including error type information) + * @warning_counter: counter of non-fatal hardware errors + * @reserved3: reserved bytes; avoid reading or writing + * @interface_version: hardware-reported interface version + * @reserved4: reserved bytes; avoid reading or writing + * + * A shared memory area at the base of IPA resident memory is used for + * communication with the microcontroller. The region is 128 bytes in + * size, but only the first 40 bytes (structured this way) are used. + */ +struct ipa_uc_mem_area { + u8 command; /* enum ipa_uc_command */ + u8 reserved0[3]; + __le32 command_param; + __le32 command_param_hi; + u8 response; /* enum ipa_uc_response */ + u8 reserved1[3]; + __le32 response_param; + u8 event; /* enum ipa_uc_event */ + u8 reserved2[3]; + + __le32 event_param; + __le32 first_error_address; + u8 hw_state; + u8 warning_counter; + __le16 reserved3; + __le16 interface_version; + __le16 reserved4; +}; + +/** enum ipa_uc_command - commands from the AP to the microcontroller */ +enum ipa_uc_command { + IPA_UC_COMMAND_NO_OP = 0x0, + IPA_UC_COMMAND_UPDATE_FLAGS = 0x1, + IPA_UC_COMMAND_DEBUG_RUN_TEST = 0x2, + IPA_UC_COMMAND_DEBUG_GET_INFO = 0x3, + IPA_UC_COMMAND_ERR_FATAL = 0x4, + IPA_UC_COMMAND_CLK_GATE = 0x5, + IPA_UC_COMMAND_CLK_UNGATE = 0x6, + IPA_UC_COMMAND_MEMCPY = 0x7, + IPA_UC_COMMAND_RESET_PIPE = 0x8, + IPA_UC_COMMAND_REG_WRITE = 0x9, + IPA_UC_COMMAND_GSI_CH_EMPTY = 0xa, +}; + +/** enum ipa_uc_response - microcontroller response codes */ +enum ipa_uc_response { + IPA_UC_RESPONSE_NO_OP = 0x0, + IPA_UC_RESPONSE_INIT_COMPLETED = 0x1, + IPA_UC_RESPONSE_CMD_COMPLETED = 0x2, + IPA_UC_RESPONSE_DEBUG_GET_INFO = 0x3, +}; + +/** enum ipa_uc_event - common cpu events reported by the microcontroller */ +enum ipa_uc_event { + IPA_UC_EVENT_NO_OP = 0x0, + IPA_UC_EVENT_ERROR = 0x1, + IPA_UC_EVENT_LOG_INFO = 0x2, +}; + +static struct ipa_uc_mem_area *ipa_uc_shared(struct ipa *ipa) +{ + const struct ipa_mem *mem = ipa_mem_find(ipa, IPA_MEM_UC_SHARED); + u32 offset = ipa->mem_offset + mem->offset; + + return ipa->mem_virt + offset; +} + +/* Microcontroller event IPA interrupt handler */ +static void ipa_uc_event_handler(struct ipa *ipa) +{ + struct ipa_uc_mem_area *shared = ipa_uc_shared(ipa); + struct device *dev = &ipa->pdev->dev; + + if (shared->event == IPA_UC_EVENT_ERROR) + dev_err(dev, "microcontroller error event\n"); + else if (shared->event != IPA_UC_EVENT_LOG_INFO) + dev_err(dev, "unsupported microcontroller event %u\n", + shared->event); + /* The LOG_INFO event can be safely ignored */ +} + +/* Microcontroller response IPA interrupt handler */ +static void ipa_uc_response_hdlr(struct ipa *ipa) +{ + struct ipa_uc_mem_area *shared = ipa_uc_shared(ipa); + struct device *dev = &ipa->pdev->dev; + + /* An INIT_COMPLETED response message is sent to the AP by the + * microcontroller when it is operational. Other than this, the AP + * should only receive responses from the microcontroller when it has + * sent it a request message. + * + * We can drop the power reference taken in ipa_uc_power() once we + * know the microcontroller has finished its initialization. + */ + switch (shared->response) { + case IPA_UC_RESPONSE_INIT_COMPLETED: + if (ipa->uc_powered) { + ipa->uc_loaded = true; + ipa_power_retention(ipa, true); + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); + ipa->uc_powered = false; + } else { + dev_warn(dev, "unexpected init_completed response\n"); + } + break; + default: + dev_warn(dev, "unsupported microcontroller response %u\n", + shared->response); + break; + } +} + +void ipa_uc_interrupt_handler(struct ipa *ipa, enum ipa_irq_id irq_id) +{ + /* Silently ignore anything unrecognized */ + if (irq_id == IPA_IRQ_UC_0) + ipa_uc_event_handler(ipa); + else if (irq_id == IPA_IRQ_UC_1) + ipa_uc_response_hdlr(ipa); +} + +/* Configure the IPA microcontroller subsystem */ +void ipa_uc_config(struct ipa *ipa) +{ + ipa->uc_powered = false; + ipa->uc_loaded = false; + ipa_interrupt_enable(ipa, IPA_IRQ_UC_0); + ipa_interrupt_enable(ipa, IPA_IRQ_UC_1); +} + +/* Inverse of ipa_uc_config() */ +void ipa_uc_deconfig(struct ipa *ipa) +{ + struct device *dev = &ipa->pdev->dev; + + ipa_interrupt_disable(ipa, IPA_IRQ_UC_1); + ipa_interrupt_disable(ipa, IPA_IRQ_UC_0); + if (ipa->uc_loaded) + ipa_power_retention(ipa, false); + + if (!ipa->uc_powered) + return; + + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); +} + +/* Take a proxy power reference for the microcontroller */ +void ipa_uc_power(struct ipa *ipa) +{ + static bool already; + struct device *dev; + int ret; + + if (already) + return; + already = true; /* Only do this on first boot */ + + /* This power reference dropped in ipa_uc_response_hdlr() above */ + dev = &ipa->pdev->dev; + ret = pm_runtime_get_sync(dev); + if (ret < 0) { + pm_runtime_put_noidle(dev); + dev_err(dev, "error %d getting proxy power\n", ret); + } else { + ipa->uc_powered = true; + } +} + +/* Send a command to the microcontroller */ +static void send_uc_command(struct ipa *ipa, u32 command, u32 command_param) +{ + struct ipa_uc_mem_area *shared = ipa_uc_shared(ipa); + const struct reg *reg; + u32 val; + + /* Fill in the command data */ + shared->command = command; + shared->command_param = cpu_to_le32(command_param); + shared->command_param_hi = 0; + shared->response = 0; + shared->response_param = 0; + + /* Use an interrupt to tell the microcontroller the command is ready */ + reg = ipa_reg(ipa, IPA_IRQ_UC); + val = reg_bit(reg, UC_INTR); + + iowrite32(val, ipa->reg_virt + reg_offset(reg)); +} + +/* Tell the microcontroller the AP is shutting down */ +void ipa_uc_panic_notifier(struct ipa *ipa) +{ + if (!ipa->uc_loaded) + return; + + send_uc_command(ipa, IPA_UC_COMMAND_ERR_FATAL, 0); + + /* give uc enough time to save state */ + udelay(IPA_SEND_DELAY); +} -- cgit v1.2.3