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_protocol.c | 283 ++++++++++++++++++++++++++++++ 1 file changed, 283 insertions(+) create mode 100644 drivers/net/wwan/iosm/iosm_ipc_protocol.c (limited to 'drivers/net/wwan/iosm/iosm_ipc_protocol.c') diff --git a/drivers/net/wwan/iosm/iosm_ipc_protocol.c b/drivers/net/wwan/iosm/iosm_ipc_protocol.c new file mode 100644 index 000000000..63fc7012f --- /dev/null +++ b/drivers/net/wwan/iosm/iosm_ipc_protocol.c @@ -0,0 +1,283 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020-21 Intel Corporation. + */ + +#include "iosm_ipc_imem.h" +#include "iosm_ipc_protocol.h" +#include "iosm_ipc_protocol_ops.h" +#include "iosm_ipc_pm.h" +#include "iosm_ipc_task_queue.h" + +int ipc_protocol_tq_msg_send(struct iosm_protocol *ipc_protocol, + enum ipc_msg_prep_type msg_type, + union ipc_msg_prep_args *prep_args, + struct ipc_rsp *response) +{ + int index = ipc_protocol_msg_prep(ipc_protocol->imem, msg_type, + prep_args); + + /* Store reference towards caller specified response in response ring + * and signal CP + */ + if (index >= 0 && index < IPC_MEM_MSG_ENTRIES) { + ipc_protocol->rsp_ring[index] = response; + ipc_protocol_msg_hp_update(ipc_protocol->imem); + } + + return index; +} + +/* Callback for message send */ +static int ipc_protocol_tq_msg_send_cb(struct iosm_imem *ipc_imem, int arg, + void *msg, size_t size) +{ + struct ipc_call_msg_send_args *send_args = msg; + struct iosm_protocol *ipc_protocol = ipc_imem->ipc_protocol; + + return ipc_protocol_tq_msg_send(ipc_protocol, send_args->msg_type, + send_args->prep_args, + send_args->response); +} + +/* Remove reference to a response. This is typically used when a requestor timed + * out and is no longer interested in the response. + */ +static int ipc_protocol_tq_msg_remove(struct iosm_imem *ipc_imem, int arg, + void *msg, size_t size) +{ + struct iosm_protocol *ipc_protocol = ipc_imem->ipc_protocol; + + ipc_protocol->rsp_ring[arg] = NULL; + return 0; +} + +int ipc_protocol_msg_send(struct iosm_protocol *ipc_protocol, + enum ipc_msg_prep_type prep, + union ipc_msg_prep_args *prep_args) +{ + struct ipc_call_msg_send_args send_args; + unsigned int exec_timeout; + struct ipc_rsp response; + int index; + + exec_timeout = (ipc_protocol_get_ap_exec_stage(ipc_protocol) == + IPC_MEM_EXEC_STAGE_RUN ? + IPC_MSG_COMPLETE_RUN_DEFAULT_TIMEOUT : + IPC_MSG_COMPLETE_BOOT_DEFAULT_TIMEOUT); + + /* Trap if called from non-preemptible context */ + might_sleep(); + + response.status = IPC_MEM_MSG_CS_INVALID; + init_completion(&response.completion); + + send_args.msg_type = prep; + send_args.prep_args = prep_args; + send_args.response = &response; + + /* Allocate and prepare message to be sent in tasklet context. + * A positive index returned form tasklet_call references the message + * in case it needs to be cancelled when there is a timeout. + */ + index = ipc_task_queue_send_task(ipc_protocol->imem, + ipc_protocol_tq_msg_send_cb, 0, + &send_args, 0, true); + + if (index < 0) { + dev_err(ipc_protocol->dev, "msg %d failed", prep); + return index; + } + + /* Wait for the device to respond to the message */ + switch (wait_for_completion_timeout(&response.completion, + msecs_to_jiffies(exec_timeout))) { + case 0: + /* Timeout, there was no response from the device. + * Remove the reference to the local response completion + * object as we are no longer interested in the response. + */ + ipc_task_queue_send_task(ipc_protocol->imem, + ipc_protocol_tq_msg_remove, index, + NULL, 0, true); + dev_err(ipc_protocol->dev, "msg timeout"); + ipc_uevent_send(ipc_protocol->pcie->dev, UEVENT_MDM_TIMEOUT); + break; + default: + /* We got a response in time; check completion status: */ + if (response.status != IPC_MEM_MSG_CS_SUCCESS) { + dev_err(ipc_protocol->dev, + "msg completion status error %d", + response.status); + return -EIO; + } + } + + return 0; +} + +static int ipc_protocol_msg_send_host_sleep(struct iosm_protocol *ipc_protocol, + u32 state) +{ + union ipc_msg_prep_args prep_args = { + .sleep.target = 0, + .sleep.state = state, + }; + + return ipc_protocol_msg_send(ipc_protocol, IPC_MSG_PREP_SLEEP, + &prep_args); +} + +void ipc_protocol_doorbell_trigger(struct iosm_protocol *ipc_protocol, + u32 identifier) +{ + ipc_pm_signal_hpda_doorbell(&ipc_protocol->pm, identifier, true); +} + +bool ipc_protocol_pm_dev_sleep_handle(struct iosm_protocol *ipc_protocol) +{ + u32 ipc_status = ipc_protocol_get_ipc_status(ipc_protocol); + u32 requested; + + if (ipc_status != IPC_MEM_DEVICE_IPC_RUNNING) { + dev_err(ipc_protocol->dev, + "irq ignored, CP IPC state is %d, should be RUNNING", + ipc_status); + + /* Stop further processing. */ + return false; + } + + /* Get a copy of the requested PM state by the device and the local + * device PM state. + */ + requested = ipc_protocol_pm_dev_get_sleep_notification(ipc_protocol); + + return ipc_pm_dev_slp_notification(&ipc_protocol->pm, requested); +} + +static int ipc_protocol_tq_wakeup_dev_slp(struct iosm_imem *ipc_imem, int arg, + void *msg, size_t size) +{ + struct iosm_pm *ipc_pm = &ipc_imem->ipc_protocol->pm; + + /* Wakeup from device sleep if it is not ACTIVE */ + ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_HS, true); + + ipc_pm_trigger(ipc_pm, IPC_PM_UNIT_HS, false); + + return 0; +} + +void ipc_protocol_s2idle_sleep(struct iosm_protocol *ipc_protocol, bool sleep) +{ + ipc_pm_set_s2idle_sleep(&ipc_protocol->pm, sleep); +} + +bool ipc_protocol_suspend(struct iosm_protocol *ipc_protocol) +{ + if (!ipc_pm_prepare_host_sleep(&ipc_protocol->pm)) + goto err; + + ipc_task_queue_send_task(ipc_protocol->imem, + ipc_protocol_tq_wakeup_dev_slp, 0, NULL, 0, + true); + + if (!ipc_pm_wait_for_device_active(&ipc_protocol->pm)) { + ipc_uevent_send(ipc_protocol->pcie->dev, UEVENT_MDM_TIMEOUT); + goto err; + } + + /* Send the sleep message for sync sys calls. */ + dev_dbg(ipc_protocol->dev, "send TARGET_HOST, ENTER_SLEEP"); + if (ipc_protocol_msg_send_host_sleep(ipc_protocol, + IPC_HOST_SLEEP_ENTER_SLEEP)) { + /* Sending ENTER_SLEEP message failed, we are still active */ + ipc_protocol->pm.host_pm_state = IPC_MEM_HOST_PM_ACTIVE; + goto err; + } + + ipc_protocol->pm.host_pm_state = IPC_MEM_HOST_PM_SLEEP; + return true; +err: + return false; +} + +bool ipc_protocol_resume(struct iosm_protocol *ipc_protocol) +{ + if (!ipc_pm_prepare_host_active(&ipc_protocol->pm)) + return false; + + dev_dbg(ipc_protocol->dev, "send TARGET_HOST, EXIT_SLEEP"); + if (ipc_protocol_msg_send_host_sleep(ipc_protocol, + IPC_HOST_SLEEP_EXIT_SLEEP)) { + ipc_protocol->pm.host_pm_state = IPC_MEM_HOST_PM_SLEEP; + return false; + } + + ipc_protocol->pm.host_pm_state = IPC_MEM_HOST_PM_ACTIVE; + + return true; +} + +struct iosm_protocol *ipc_protocol_init(struct iosm_imem *ipc_imem) +{ + struct iosm_protocol *ipc_protocol = + kzalloc(sizeof(*ipc_protocol), GFP_KERNEL); + struct ipc_protocol_context_info *p_ci; + u64 addr; + + if (!ipc_protocol) + return NULL; + + ipc_protocol->dev = ipc_imem->dev; + ipc_protocol->pcie = ipc_imem->pcie; + ipc_protocol->imem = ipc_imem; + ipc_protocol->p_ap_shm = NULL; + ipc_protocol->phy_ap_shm = 0; + + ipc_protocol->old_msg_tail = 0; + + ipc_protocol->p_ap_shm = + dma_alloc_coherent(&ipc_protocol->pcie->pci->dev, + sizeof(*ipc_protocol->p_ap_shm), + &ipc_protocol->phy_ap_shm, GFP_KERNEL); + + if (!ipc_protocol->p_ap_shm) { + dev_err(ipc_protocol->dev, "pci shm alloc error"); + kfree(ipc_protocol); + return NULL; + } + + /* Prepare the context info for CP. */ + addr = ipc_protocol->phy_ap_shm; + p_ci = &ipc_protocol->p_ap_shm->ci; + p_ci->device_info_addr = + addr + offsetof(struct ipc_protocol_ap_shm, device_info); + p_ci->head_array = + addr + offsetof(struct ipc_protocol_ap_shm, head_array); + p_ci->tail_array = + addr + offsetof(struct ipc_protocol_ap_shm, tail_array); + p_ci->msg_head = addr + offsetof(struct ipc_protocol_ap_shm, msg_head); + p_ci->msg_tail = addr + offsetof(struct ipc_protocol_ap_shm, msg_tail); + p_ci->msg_ring_addr = + addr + offsetof(struct ipc_protocol_ap_shm, msg_ring); + p_ci->msg_ring_entries = cpu_to_le16(IPC_MEM_MSG_ENTRIES); + p_ci->msg_irq_vector = IPC_MSG_IRQ_VECTOR; + p_ci->device_info_irq_vector = IPC_DEVICE_IRQ_VECTOR; + + ipc_mmio_set_contex_info_addr(ipc_imem->mmio, addr); + + ipc_pm_init(ipc_protocol); + + return ipc_protocol; +} + +void ipc_protocol_deinit(struct iosm_protocol *proto) +{ + dma_free_coherent(&proto->pcie->pci->dev, sizeof(*proto->p_ap_shm), + proto->p_ap_shm, proto->phy_ap_shm); + + ipc_pm_deinit(proto); + kfree(proto); +} -- cgit v1.2.3