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/wwan/iosm/iosm_ipc_pm.c | 333 ++++++++++++++++++++++++++++++++++++ 1 file changed, 333 insertions(+) create mode 100644 drivers/net/wwan/iosm/iosm_ipc_pm.c (limited to 'drivers/net/wwan/iosm/iosm_ipc_pm.c') diff --git a/drivers/net/wwan/iosm/iosm_ipc_pm.c b/drivers/net/wwan/iosm/iosm_ipc_pm.c new file mode 100644 index 000000000..413601c72 --- /dev/null +++ b/drivers/net/wwan/iosm/iosm_ipc_pm.c @@ -0,0 +1,333 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020-21 Intel Corporation. + */ + +#include "iosm_ipc_protocol.h" + +/* Timeout value in MS for the PM to wait for device to reach active state */ +#define IPC_PM_ACTIVE_TIMEOUT_MS (500) + +/* Note that here "active" has the value 1, as compared to the enums + * ipc_mem_host_pm_state or ipc_mem_dev_pm_state, where "active" is 0 + */ +#define IPC_PM_SLEEP (0) +#define CONSUME_STATE (0) +#define IPC_PM_ACTIVE (1) + +void ipc_pm_signal_hpda_doorbell(struct iosm_pm *ipc_pm, u32 identifier, + bool host_slp_check) +{ + if (host_slp_check && ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE && + ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE_WAIT) { + ipc_pm->pending_hpda_update = true; + dev_dbg(ipc_pm->dev, + "Pend HPDA update set. Host PM_State: %d identifier:%d", + ipc_pm->host_pm_state, identifier); + return; + } + + if (!ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_IRQ, true)) { + ipc_pm->pending_hpda_update = true; + dev_dbg(ipc_pm->dev, "Pending HPDA update set. identifier:%d", + identifier); + return; + } + ipc_pm->pending_hpda_update = false; + + /* Trigger the irq towards CP */ + ipc_cp_irq_hpda_update(ipc_pm->pcie, identifier); + + ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_IRQ, false); +} + +/* Wake up the device if it is in low power mode. */ +static bool ipc_pm_link_activate(struct iosm_pm *ipc_pm) +{ + if (ipc_pm->cp_state == IPC_MEM_DEV_PM_ACTIVE) + return true; + + if (ipc_pm->cp_state == IPC_MEM_DEV_PM_SLEEP) { + if (ipc_pm->ap_state == IPC_MEM_DEV_PM_SLEEP) { + /* Wake up the device. */ + ipc_cp_irq_sleep_control(ipc_pm->pcie, + IPC_MEM_DEV_PM_WAKEUP); + ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE_WAIT; + + goto not_active; + } + + if (ipc_pm->ap_state == IPC_MEM_DEV_PM_ACTIVE_WAIT) + goto not_active; + + return true; + } + +not_active: + /* link is not ready */ + return false; +} + +bool ipc_pm_wait_for_device_active(struct iosm_pm *ipc_pm) +{ + bool ret_val = false; + + if (ipc_pm->ap_state != IPC_MEM_DEV_PM_ACTIVE) { + /* Complete all memory stores before setting bit */ + smp_mb__before_atomic(); + + /* Wait for IPC_PM_ACTIVE_TIMEOUT_MS for Device sleep state + * machine to enter ACTIVE state. + */ + set_bit(0, &ipc_pm->host_sleep_pend); + + /* Complete all memory stores after setting bit */ + smp_mb__after_atomic(); + + if (!wait_for_completion_interruptible_timeout + (&ipc_pm->host_sleep_complete, + msecs_to_jiffies(IPC_PM_ACTIVE_TIMEOUT_MS))) { + dev_err(ipc_pm->dev, + "PM timeout. Expected State:%d. Actual: %d", + IPC_MEM_DEV_PM_ACTIVE, ipc_pm->ap_state); + goto active_timeout; + } + } + + ret_val = true; +active_timeout: + /* Complete all memory stores before clearing bit */ + smp_mb__before_atomic(); + + /* Reset the atomic variable in any case as device sleep + * state machine change is no longer of interest. + */ + clear_bit(0, &ipc_pm->host_sleep_pend); + + /* Complete all memory stores after clearing bit */ + smp_mb__after_atomic(); + + return ret_val; +} + +static void ipc_pm_on_link_sleep(struct iosm_pm *ipc_pm) +{ + /* pending sleep ack and all conditions are cleared + * -> signal SLEEP__ACK to CP + */ + ipc_pm->cp_state = IPC_MEM_DEV_PM_SLEEP; + ipc_pm->ap_state = IPC_MEM_DEV_PM_SLEEP; + + ipc_cp_irq_sleep_control(ipc_pm->pcie, IPC_MEM_DEV_PM_SLEEP); +} + +static void ipc_pm_on_link_wake(struct iosm_pm *ipc_pm, bool ack) +{ + ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE; + + if (ack) { + ipc_pm->cp_state = IPC_MEM_DEV_PM_ACTIVE; + + ipc_cp_irq_sleep_control(ipc_pm->pcie, IPC_MEM_DEV_PM_ACTIVE); + + /* check the consume state !!! */ + if (test_bit(CONSUME_STATE, &ipc_pm->host_sleep_pend)) + complete(&ipc_pm->host_sleep_complete); + } + + /* Check for pending HPDA update. + * Pending HP update could be because of sending message was + * put on hold due to Device sleep state or due to TD update + * which could be because of Device Sleep and Host Sleep + * states. + */ + if (ipc_pm->pending_hpda_update && + ipc_pm->host_pm_state == IPC_MEM_HOST_PM_ACTIVE) + ipc_pm_signal_hpda_doorbell(ipc_pm, IPC_HP_PM_TRIGGER, true); +} + +bool ipc_pm_trigger(struct iosm_pm *ipc_pm, enum ipc_pm_unit unit, bool active) +{ + union ipc_pm_cond old_cond; + union ipc_pm_cond new_cond; + bool link_active; + + /* Save the current D3 state. */ + new_cond = ipc_pm->pm_cond; + old_cond = ipc_pm->pm_cond; + + /* Calculate the power state only in the runtime phase. */ + switch (unit) { + case IPC_PM_UNIT_IRQ: /* CP irq */ + new_cond.irq = active; + break; + + case IPC_PM_UNIT_LINK: /* Device link state. */ + new_cond.link = active; + break; + + case IPC_PM_UNIT_HS: /* Host sleep trigger requires Link. */ + new_cond.hs = active; + break; + + default: + break; + } + + /* Something changed ? */ + if (old_cond.raw == new_cond.raw) { + /* Stay in the current PM state. */ + link_active = old_cond.link == IPC_PM_ACTIVE; + goto ret; + } + + ipc_pm->pm_cond = new_cond; + + if (new_cond.link) + ipc_pm_on_link_wake(ipc_pm, unit == IPC_PM_UNIT_LINK); + else if (unit == IPC_PM_UNIT_LINK) + ipc_pm_on_link_sleep(ipc_pm); + + if (old_cond.link == IPC_PM_SLEEP && new_cond.raw) { + link_active = ipc_pm_link_activate(ipc_pm); + goto ret; + } + + link_active = old_cond.link == IPC_PM_ACTIVE; + +ret: + return link_active; +} + +bool ipc_pm_prepare_host_sleep(struct iosm_pm *ipc_pm) +{ + /* suspend not allowed if host_pm_state is not IPC_MEM_HOST_PM_ACTIVE */ + if (ipc_pm->host_pm_state != IPC_MEM_HOST_PM_ACTIVE) { + dev_err(ipc_pm->dev, "host_pm_state=%d\tExpected to be: %d", + ipc_pm->host_pm_state, IPC_MEM_HOST_PM_ACTIVE); + return false; + } + + ipc_pm->host_pm_state = IPC_MEM_HOST_PM_SLEEP_WAIT_D3; + + return true; +} + +bool ipc_pm_prepare_host_active(struct iosm_pm *ipc_pm) +{ + if (ipc_pm->host_pm_state != IPC_MEM_HOST_PM_SLEEP) { + dev_err(ipc_pm->dev, "host_pm_state=%d\tExpected to be: %d", + ipc_pm->host_pm_state, IPC_MEM_HOST_PM_SLEEP); + return false; + } + + /* Sending Sleep Exit message to CP. Update the state */ + ipc_pm->host_pm_state = IPC_MEM_HOST_PM_ACTIVE_WAIT; + + return true; +} + +void ipc_pm_set_s2idle_sleep(struct iosm_pm *ipc_pm, bool sleep) +{ + if (sleep) { + ipc_pm->ap_state = IPC_MEM_DEV_PM_SLEEP; + ipc_pm->cp_state = IPC_MEM_DEV_PM_SLEEP; + ipc_pm->device_sleep_notification = IPC_MEM_DEV_PM_SLEEP; + } else { + ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE; + ipc_pm->cp_state = IPC_MEM_DEV_PM_ACTIVE; + ipc_pm->device_sleep_notification = IPC_MEM_DEV_PM_ACTIVE; + ipc_pm->pm_cond.link = IPC_PM_ACTIVE; + } +} + +bool ipc_pm_dev_slp_notification(struct iosm_pm *ipc_pm, u32 cp_pm_req) +{ + if (cp_pm_req == ipc_pm->device_sleep_notification) + return false; + + ipc_pm->device_sleep_notification = cp_pm_req; + + /* Evaluate the PM request. */ + switch (ipc_pm->cp_state) { + case IPC_MEM_DEV_PM_ACTIVE: + switch (cp_pm_req) { + case IPC_MEM_DEV_PM_ACTIVE: + break; + + case IPC_MEM_DEV_PM_SLEEP: + /* Inform the PM that the device link can go down. */ + ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_LINK, false); + return true; + + default: + dev_err(ipc_pm->dev, + "loc-pm=%d active: confused req-pm=%d", + ipc_pm->cp_state, cp_pm_req); + break; + } + break; + + case IPC_MEM_DEV_PM_SLEEP: + switch (cp_pm_req) { + case IPC_MEM_DEV_PM_ACTIVE: + /* Inform the PM that the device link is active. */ + ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_LINK, true); + break; + + case IPC_MEM_DEV_PM_SLEEP: + break; + + default: + dev_err(ipc_pm->dev, + "loc-pm=%d sleep: confused req-pm=%d", + ipc_pm->cp_state, cp_pm_req); + break; + } + break; + + default: + dev_err(ipc_pm->dev, "confused loc-pm=%d, req-pm=%d", + ipc_pm->cp_state, cp_pm_req); + break; + } + + return false; +} + +void ipc_pm_init(struct iosm_protocol *ipc_protocol) +{ + struct iosm_imem *ipc_imem = ipc_protocol->imem; + struct iosm_pm *ipc_pm = &ipc_protocol->pm; + + ipc_pm->pcie = ipc_imem->pcie; + ipc_pm->dev = ipc_imem->dev; + + ipc_pm->pm_cond.irq = IPC_PM_SLEEP; + ipc_pm->pm_cond.hs = IPC_PM_SLEEP; + ipc_pm->pm_cond.link = IPC_PM_ACTIVE; + + ipc_pm->cp_state = IPC_MEM_DEV_PM_ACTIVE; + ipc_pm->ap_state = IPC_MEM_DEV_PM_ACTIVE; + ipc_pm->host_pm_state = IPC_MEM_HOST_PM_ACTIVE; + + /* Create generic wait-for-completion handler for Host Sleep + * and device sleep coordination. + */ + init_completion(&ipc_pm->host_sleep_complete); + + /* Complete all memory stores before clearing bit */ + smp_mb__before_atomic(); + + clear_bit(0, &ipc_pm->host_sleep_pend); + + /* Complete all memory stores after clearing bit */ + smp_mb__after_atomic(); +} + +void ipc_pm_deinit(struct iosm_protocol *proto) +{ + struct iosm_pm *ipc_pm = &proto->pm; + + complete(&ipc_pm->host_sleep_complete); +} -- cgit v1.2.3