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/misc/mei/init.c | 418 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 418 insertions(+) create mode 100644 drivers/misc/mei/init.c (limited to 'drivers/misc/mei/init.c') diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c new file mode 100644 index 000000000..bac8852aa --- /dev/null +++ b/drivers/misc/mei/init.c @@ -0,0 +1,418 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2012-2022, Intel Corporation. All rights reserved. + * Intel Management Engine Interface (Intel MEI) Linux driver + */ + +#include +#include +#include +#include + +#include + +#include "mei_dev.h" +#include "hbm.h" +#include "client.h" + +const char *mei_dev_state_str(int state) +{ +#define MEI_DEV_STATE(state) case MEI_DEV_##state: return #state + switch (state) { + MEI_DEV_STATE(INITIALIZING); + MEI_DEV_STATE(INIT_CLIENTS); + MEI_DEV_STATE(ENABLED); + MEI_DEV_STATE(RESETTING); + MEI_DEV_STATE(DISABLED); + MEI_DEV_STATE(POWERING_DOWN); + MEI_DEV_STATE(POWER_DOWN); + MEI_DEV_STATE(POWER_UP); + default: + return "unknown"; + } +#undef MEI_DEV_STATE +} + +const char *mei_pg_state_str(enum mei_pg_state state) +{ +#define MEI_PG_STATE(state) case MEI_PG_##state: return #state + switch (state) { + MEI_PG_STATE(OFF); + MEI_PG_STATE(ON); + default: + return "unknown"; + } +#undef MEI_PG_STATE +} + +/** + * mei_fw_status2str - convert fw status registers to printable string + * + * @fw_status: firmware status + * @buf: string buffer at minimal size MEI_FW_STATUS_STR_SZ + * @len: buffer len must be >= MEI_FW_STATUS_STR_SZ + * + * Return: number of bytes written or -EINVAL if buffer is to small + */ +ssize_t mei_fw_status2str(struct mei_fw_status *fw_status, + char *buf, size_t len) +{ + ssize_t cnt = 0; + int i; + + buf[0] = '\0'; + + if (len < MEI_FW_STATUS_STR_SZ) + return -EINVAL; + + for (i = 0; i < fw_status->count; i++) + cnt += scnprintf(buf + cnt, len - cnt, "%08X ", + fw_status->status[i]); + + /* drop last space */ + buf[cnt] = '\0'; + return cnt; +} +EXPORT_SYMBOL_GPL(mei_fw_status2str); + +/** + * mei_cancel_work - Cancel mei background jobs + * + * @dev: the device structure + */ +void mei_cancel_work(struct mei_device *dev) +{ + cancel_work_sync(&dev->reset_work); + cancel_work_sync(&dev->bus_rescan_work); + + cancel_delayed_work_sync(&dev->timer_work); +} +EXPORT_SYMBOL_GPL(mei_cancel_work); + +/** + * mei_reset - resets host and fw. + * + * @dev: the device structure + * + * Return: 0 on success or < 0 if the reset hasn't succeeded + */ +int mei_reset(struct mei_device *dev) +{ + enum mei_dev_state state = dev->dev_state; + bool interrupts_enabled; + int ret; + + if (state != MEI_DEV_INITIALIZING && + state != MEI_DEV_DISABLED && + state != MEI_DEV_POWER_DOWN && + state != MEI_DEV_POWER_UP) { + char fw_sts_str[MEI_FW_STATUS_STR_SZ]; + + mei_fw_status_str(dev, fw_sts_str, MEI_FW_STATUS_STR_SZ); + dev_warn(dev->dev, "unexpected reset: dev_state = %s fw status = %s\n", + mei_dev_state_str(state), fw_sts_str); + } + + mei_clear_interrupts(dev); + + /* we're already in reset, cancel the init timer + * if the reset was called due the hbm protocol error + * we need to call it before hw start + * so the hbm watchdog won't kick in + */ + mei_hbm_idle(dev); + + /* enter reset flow */ + interrupts_enabled = state != MEI_DEV_POWER_DOWN; + mei_set_devstate(dev, MEI_DEV_RESETTING); + + dev->reset_count++; + if (dev->reset_count > MEI_MAX_CONSEC_RESET) { + dev_err(dev->dev, "reset: reached maximal consecutive resets: disabling the device\n"); + mei_set_devstate(dev, MEI_DEV_DISABLED); + return -ENODEV; + } + + ret = mei_hw_reset(dev, interrupts_enabled); + /* fall through and remove the sw state even if hw reset has failed */ + + /* no need to clean up software state in case of power up */ + if (state != MEI_DEV_INITIALIZING && state != MEI_DEV_POWER_UP) + mei_cl_all_disconnect(dev); + + mei_hbm_reset(dev); + + memset(dev->rd_msg_hdr, 0, sizeof(dev->rd_msg_hdr)); + + if (ret) { + dev_err(dev->dev, "hw_reset failed ret = %d\n", ret); + return ret; + } + + if (state == MEI_DEV_POWER_DOWN) { + dev_dbg(dev->dev, "powering down: end of reset\n"); + mei_set_devstate(dev, MEI_DEV_DISABLED); + return 0; + } + + ret = mei_hw_start(dev); + if (ret) { + dev_err(dev->dev, "hw_start failed ret = %d\n", ret); + return ret; + } + + if (dev->dev_state != MEI_DEV_RESETTING) { + dev_dbg(dev->dev, "wrong state = %d on link start\n", dev->dev_state); + return 0; + } + + dev_dbg(dev->dev, "link is established start sending messages.\n"); + + mei_set_devstate(dev, MEI_DEV_INIT_CLIENTS); + ret = mei_hbm_start_req(dev); + if (ret) { + dev_err(dev->dev, "hbm_start failed ret = %d\n", ret); + mei_set_devstate(dev, MEI_DEV_RESETTING); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(mei_reset); + +/** + * mei_start - initializes host and fw to start work. + * + * @dev: the device structure + * + * Return: 0 on success, <0 on failure. + */ +int mei_start(struct mei_device *dev) +{ + int ret; + + mutex_lock(&dev->device_lock); + + /* acknowledge interrupt and stop interrupts */ + mei_clear_interrupts(dev); + + ret = mei_hw_config(dev); + if (ret) + goto err; + + dev_dbg(dev->dev, "reset in start the mei device.\n"); + + dev->reset_count = 0; + do { + mei_set_devstate(dev, MEI_DEV_INITIALIZING); + ret = mei_reset(dev); + + if (ret == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) { + dev_err(dev->dev, "reset failed ret = %d", ret); + goto err; + } + } while (ret); + + if (mei_hbm_start_wait(dev)) { + dev_err(dev->dev, "HBM haven't started"); + goto err; + } + + if (!mei_hbm_version_is_supported(dev)) { + dev_dbg(dev->dev, "MEI start failed.\n"); + goto err; + } + + dev_dbg(dev->dev, "link layer has been established.\n"); + + mutex_unlock(&dev->device_lock); + return 0; +err: + dev_err(dev->dev, "link layer initialization failed.\n"); + mei_set_devstate(dev, MEI_DEV_DISABLED); + mutex_unlock(&dev->device_lock); + return -ENODEV; +} +EXPORT_SYMBOL_GPL(mei_start); + +/** + * mei_restart - restart device after suspend + * + * @dev: the device structure + * + * Return: 0 on success or -ENODEV if the restart hasn't succeeded + */ +int mei_restart(struct mei_device *dev) +{ + int err; + + mutex_lock(&dev->device_lock); + + mei_set_devstate(dev, MEI_DEV_POWER_UP); + dev->reset_count = 0; + + err = mei_reset(dev); + + mutex_unlock(&dev->device_lock); + + if (err == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) { + dev_err(dev->dev, "device disabled = %d\n", err); + return -ENODEV; + } + + /* try to start again */ + if (err) + schedule_work(&dev->reset_work); + + + return 0; +} +EXPORT_SYMBOL_GPL(mei_restart); + +static void mei_reset_work(struct work_struct *work) +{ + struct mei_device *dev = + container_of(work, struct mei_device, reset_work); + int ret; + + mei_clear_interrupts(dev); + mei_synchronize_irq(dev); + + mutex_lock(&dev->device_lock); + + ret = mei_reset(dev); + + mutex_unlock(&dev->device_lock); + + if (dev->dev_state == MEI_DEV_DISABLED) { + dev_err(dev->dev, "device disabled = %d\n", ret); + return; + } + + /* retry reset in case of failure */ + if (ret) + schedule_work(&dev->reset_work); +} + +void mei_stop(struct mei_device *dev) +{ + dev_dbg(dev->dev, "stopping the device.\n"); + + mutex_lock(&dev->device_lock); + mei_set_devstate(dev, MEI_DEV_POWERING_DOWN); + mutex_unlock(&dev->device_lock); + mei_cl_bus_remove_devices(dev); + mutex_lock(&dev->device_lock); + mei_set_devstate(dev, MEI_DEV_POWER_DOWN); + mutex_unlock(&dev->device_lock); + + mei_cancel_work(dev); + + mei_clear_interrupts(dev); + mei_synchronize_irq(dev); + /* to catch HW-initiated reset */ + mei_cancel_work(dev); + + mutex_lock(&dev->device_lock); + + mei_reset(dev); + /* move device to disabled state unconditionally */ + mei_set_devstate(dev, MEI_DEV_DISABLED); + + mutex_unlock(&dev->device_lock); +} +EXPORT_SYMBOL_GPL(mei_stop); + +/** + * mei_write_is_idle - check if the write queues are idle + * + * @dev: the device structure + * + * Return: true of there is no pending write + */ +bool mei_write_is_idle(struct mei_device *dev) +{ + bool idle = (dev->dev_state == MEI_DEV_ENABLED && + list_empty(&dev->ctrl_wr_list) && + list_empty(&dev->write_list) && + list_empty(&dev->write_waiting_list)); + + dev_dbg(dev->dev, "write pg: is idle[%d] state=%s ctrl=%01d write=%01d wwait=%01d\n", + idle, + mei_dev_state_str(dev->dev_state), + list_empty(&dev->ctrl_wr_list), + list_empty(&dev->write_list), + list_empty(&dev->write_waiting_list)); + + return idle; +} +EXPORT_SYMBOL_GPL(mei_write_is_idle); + +/** + * mei_device_init - initialize mei_device structure + * + * @dev: the mei device + * @device: the device structure + * @slow_fw: configure longer timeouts as FW is slow + * @hw_ops: hw operations + */ +void mei_device_init(struct mei_device *dev, + struct device *device, + bool slow_fw, + const struct mei_hw_ops *hw_ops) +{ + /* setup our list array */ + INIT_LIST_HEAD(&dev->file_list); + INIT_LIST_HEAD(&dev->device_list); + INIT_LIST_HEAD(&dev->me_clients); + mutex_init(&dev->device_lock); + init_rwsem(&dev->me_clients_rwsem); + mutex_init(&dev->cl_bus_lock); + init_waitqueue_head(&dev->wait_hw_ready); + init_waitqueue_head(&dev->wait_pg); + init_waitqueue_head(&dev->wait_hbm_start); + dev->dev_state = MEI_DEV_INITIALIZING; + dev->reset_count = 0; + + INIT_LIST_HEAD(&dev->write_list); + INIT_LIST_HEAD(&dev->write_waiting_list); + INIT_LIST_HEAD(&dev->ctrl_wr_list); + INIT_LIST_HEAD(&dev->ctrl_rd_list); + dev->tx_queue_limit = MEI_TX_QUEUE_LIMIT_DEFAULT; + + INIT_DELAYED_WORK(&dev->timer_work, mei_timer); + INIT_WORK(&dev->reset_work, mei_reset_work); + INIT_WORK(&dev->bus_rescan_work, mei_cl_bus_rescan_work); + + bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX); + dev->open_handle_count = 0; + + dev->pxp_mode = MEI_DEV_PXP_DEFAULT; + + /* + * Reserving the first client ID + * 0: Reserved for MEI Bus Message communications + */ + bitmap_set(dev->host_clients_map, 0, 1); + + dev->pg_event = MEI_PG_EVENT_IDLE; + dev->ops = hw_ops; + dev->dev = device; + + dev->timeouts.hw_ready = mei_secs_to_jiffies(MEI_HW_READY_TIMEOUT); + dev->timeouts.connect = MEI_CONNECT_TIMEOUT; + dev->timeouts.client_init = MEI_CLIENTS_INIT_TIMEOUT; + dev->timeouts.pgi = mei_secs_to_jiffies(MEI_PGI_TIMEOUT); + dev->timeouts.d0i3 = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT); + if (slow_fw) { + dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT_SLOW); + dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT_SLOW); + dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT_SLOW); + } else { + dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT); + dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT); + dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT); + } +} +EXPORT_SYMBOL_GPL(mei_device_init); + -- cgit v1.2.3