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/mailbox/qcom-ipcc.c | 371 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 371 insertions(+) create mode 100644 drivers/mailbox/qcom-ipcc.c (limited to 'drivers/mailbox/qcom-ipcc.c') diff --git a/drivers/mailbox/qcom-ipcc.c b/drivers/mailbox/qcom-ipcc.c new file mode 100644 index 000000000..7e27acf6c --- /dev/null +++ b/drivers/mailbox/qcom-ipcc.c @@ -0,0 +1,371 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +/* IPCC Register offsets */ +#define IPCC_REG_SEND_ID 0x0c +#define IPCC_REG_RECV_ID 0x10 +#define IPCC_REG_RECV_SIGNAL_ENABLE 0x14 +#define IPCC_REG_RECV_SIGNAL_DISABLE 0x18 +#define IPCC_REG_RECV_SIGNAL_CLEAR 0x1c +#define IPCC_REG_CLIENT_CLEAR 0x38 + +#define IPCC_SIGNAL_ID_MASK GENMASK(15, 0) +#define IPCC_CLIENT_ID_MASK GENMASK(31, 16) + +#define IPCC_NO_PENDING_IRQ GENMASK(31, 0) + +/** + * struct qcom_ipcc_chan_info - Per-mailbox-channel info + * @client_id: The client-id to which the interrupt has to be triggered + * @signal_id: The signal-id to which the interrupt has to be triggered + */ +struct qcom_ipcc_chan_info { + u16 client_id; + u16 signal_id; +}; + +/** + * struct qcom_ipcc - Holder for the mailbox driver + * @dev: Device associated with this instance + * @base: Base address of the IPCC frame associated to APSS + * @irq_domain: The irq_domain associated with this instance + * @chans: The mailbox channels array + * @mchan: The per-mailbox channel info array + * @mbox: The mailbox controller + * @num_chans: Number of @chans elements + * @irq: Summary irq + */ +struct qcom_ipcc { + struct device *dev; + void __iomem *base; + struct irq_domain *irq_domain; + struct mbox_chan *chans; + struct qcom_ipcc_chan_info *mchan; + struct mbox_controller mbox; + int num_chans; + int irq; +}; + +static inline struct qcom_ipcc *to_qcom_ipcc(struct mbox_controller *mbox) +{ + return container_of(mbox, struct qcom_ipcc, mbox); +} + +static inline u32 qcom_ipcc_get_hwirq(u16 client_id, u16 signal_id) +{ + return FIELD_PREP(IPCC_CLIENT_ID_MASK, client_id) | + FIELD_PREP(IPCC_SIGNAL_ID_MASK, signal_id); +} + +static irqreturn_t qcom_ipcc_irq_fn(int irq, void *data) +{ + struct qcom_ipcc *ipcc = data; + u32 hwirq; + int virq; + + for (;;) { + hwirq = readl(ipcc->base + IPCC_REG_RECV_ID); + if (hwirq == IPCC_NO_PENDING_IRQ) + break; + + virq = irq_find_mapping(ipcc->irq_domain, hwirq); + writel(hwirq, ipcc->base + IPCC_REG_RECV_SIGNAL_CLEAR); + generic_handle_irq(virq); + } + + return IRQ_HANDLED; +} + +static void qcom_ipcc_mask_irq(struct irq_data *irqd) +{ + struct qcom_ipcc *ipcc = irq_data_get_irq_chip_data(irqd); + irq_hw_number_t hwirq = irqd_to_hwirq(irqd); + + writel(hwirq, ipcc->base + IPCC_REG_RECV_SIGNAL_DISABLE); +} + +static void qcom_ipcc_unmask_irq(struct irq_data *irqd) +{ + struct qcom_ipcc *ipcc = irq_data_get_irq_chip_data(irqd); + irq_hw_number_t hwirq = irqd_to_hwirq(irqd); + + writel(hwirq, ipcc->base + IPCC_REG_RECV_SIGNAL_ENABLE); +} + +static struct irq_chip qcom_ipcc_irq_chip = { + .name = "ipcc", + .irq_mask = qcom_ipcc_mask_irq, + .irq_unmask = qcom_ipcc_unmask_irq, + .flags = IRQCHIP_SKIP_SET_WAKE, +}; + +static int qcom_ipcc_domain_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hw) +{ + struct qcom_ipcc *ipcc = d->host_data; + + irq_set_chip_and_handler(irq, &qcom_ipcc_irq_chip, handle_level_irq); + irq_set_chip_data(irq, ipcc); + irq_set_noprobe(irq); + + return 0; +} + +static int qcom_ipcc_domain_xlate(struct irq_domain *d, + struct device_node *node, const u32 *intspec, + unsigned int intsize, + unsigned long *out_hwirq, + unsigned int *out_type) +{ + if (intsize != 3) + return -EINVAL; + + *out_hwirq = qcom_ipcc_get_hwirq(intspec[0], intspec[1]); + *out_type = intspec[2] & IRQ_TYPE_SENSE_MASK; + + return 0; +} + +static const struct irq_domain_ops qcom_ipcc_irq_ops = { + .map = qcom_ipcc_domain_map, + .xlate = qcom_ipcc_domain_xlate, +}; + +static int qcom_ipcc_mbox_send_data(struct mbox_chan *chan, void *data) +{ + struct qcom_ipcc *ipcc = to_qcom_ipcc(chan->mbox); + struct qcom_ipcc_chan_info *mchan = chan->con_priv; + u32 hwirq; + + hwirq = qcom_ipcc_get_hwirq(mchan->client_id, mchan->signal_id); + writel(hwirq, ipcc->base + IPCC_REG_SEND_ID); + + return 0; +} + +static void qcom_ipcc_mbox_shutdown(struct mbox_chan *chan) +{ + chan->con_priv = NULL; +} + +static struct mbox_chan *qcom_ipcc_mbox_xlate(struct mbox_controller *mbox, + const struct of_phandle_args *ph) +{ + struct qcom_ipcc *ipcc = to_qcom_ipcc(mbox); + struct qcom_ipcc_chan_info *mchan; + struct mbox_chan *chan; + struct device *dev; + int chan_id; + + dev = ipcc->dev; + + if (ph->args_count != 2) + return ERR_PTR(-EINVAL); + + for (chan_id = 0; chan_id < mbox->num_chans; chan_id++) { + chan = &ipcc->chans[chan_id]; + mchan = chan->con_priv; + + if (!mchan) + break; + else if (mchan->client_id == ph->args[0] && + mchan->signal_id == ph->args[1]) + return ERR_PTR(-EBUSY); + } + + if (chan_id >= mbox->num_chans) + return ERR_PTR(-EBUSY); + + mchan = devm_kzalloc(dev, sizeof(*mchan), GFP_KERNEL); + if (!mchan) + return ERR_PTR(-ENOMEM); + + mchan->client_id = ph->args[0]; + mchan->signal_id = ph->args[1]; + chan->con_priv = mchan; + + return chan; +} + +static const struct mbox_chan_ops ipcc_mbox_chan_ops = { + .send_data = qcom_ipcc_mbox_send_data, + .shutdown = qcom_ipcc_mbox_shutdown, +}; + +static int qcom_ipcc_setup_mbox(struct qcom_ipcc *ipcc, + struct device_node *controller_dn) +{ + struct of_phandle_args curr_ph; + struct device_node *client_dn; + struct mbox_controller *mbox; + struct device *dev = ipcc->dev; + int i, j, ret; + + /* + * Find out the number of clients interested in this mailbox + * and create channels accordingly. + */ + ipcc->num_chans = 0; + for_each_node_with_property(client_dn, "mboxes") { + if (!of_device_is_available(client_dn)) + continue; + i = of_count_phandle_with_args(client_dn, + "mboxes", "#mbox-cells"); + for (j = 0; j < i; j++) { + ret = of_parse_phandle_with_args(client_dn, "mboxes", + "#mbox-cells", j, &curr_ph); + of_node_put(curr_ph.np); + if (!ret && curr_ph.np == controller_dn) { + ipcc->num_chans++; + break; + } + } + } + + /* If no clients are found, skip registering as a mbox controller */ + if (!ipcc->num_chans) + return 0; + + ipcc->chans = devm_kcalloc(dev, ipcc->num_chans, + sizeof(struct mbox_chan), GFP_KERNEL); + if (!ipcc->chans) + return -ENOMEM; + + mbox = &ipcc->mbox; + mbox->dev = dev; + mbox->num_chans = ipcc->num_chans; + mbox->chans = ipcc->chans; + mbox->ops = &ipcc_mbox_chan_ops; + mbox->of_xlate = qcom_ipcc_mbox_xlate; + mbox->txdone_irq = false; + mbox->txdone_poll = false; + + return devm_mbox_controller_register(dev, mbox); +} + +static int qcom_ipcc_pm_resume(struct device *dev) +{ + struct qcom_ipcc *ipcc = dev_get_drvdata(dev); + u32 hwirq; + int virq; + + hwirq = readl(ipcc->base + IPCC_REG_RECV_ID); + if (hwirq == IPCC_NO_PENDING_IRQ) + return 0; + + virq = irq_find_mapping(ipcc->irq_domain, hwirq); + + dev_dbg(dev, "virq: %d triggered client-id: %ld; signal-id: %ld\n", virq, + FIELD_GET(IPCC_CLIENT_ID_MASK, hwirq), FIELD_GET(IPCC_SIGNAL_ID_MASK, hwirq)); + + return 0; +} + +static int qcom_ipcc_probe(struct platform_device *pdev) +{ + struct qcom_ipcc *ipcc; + static int id; + char *name; + int ret; + + ipcc = devm_kzalloc(&pdev->dev, sizeof(*ipcc), GFP_KERNEL); + if (!ipcc) + return -ENOMEM; + + ipcc->dev = &pdev->dev; + + ipcc->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(ipcc->base)) + return PTR_ERR(ipcc->base); + + ipcc->irq = platform_get_irq(pdev, 0); + if (ipcc->irq < 0) + return ipcc->irq; + + name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "ipcc_%d", id++); + if (!name) + return -ENOMEM; + + ipcc->irq_domain = irq_domain_add_tree(pdev->dev.of_node, + &qcom_ipcc_irq_ops, ipcc); + if (!ipcc->irq_domain) + return -ENOMEM; + + ret = qcom_ipcc_setup_mbox(ipcc, pdev->dev.of_node); + if (ret) + goto err_mbox; + + ret = devm_request_irq(&pdev->dev, ipcc->irq, qcom_ipcc_irq_fn, + IRQF_TRIGGER_HIGH | IRQF_NO_SUSPEND | + IRQF_NO_THREAD, name, ipcc); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to register the irq: %d\n", ret); + goto err_req_irq; + } + + platform_set_drvdata(pdev, ipcc); + + return 0; + +err_req_irq: + if (ipcc->num_chans) + mbox_controller_unregister(&ipcc->mbox); +err_mbox: + irq_domain_remove(ipcc->irq_domain); + + return ret; +} + +static int qcom_ipcc_remove(struct platform_device *pdev) +{ + struct qcom_ipcc *ipcc = platform_get_drvdata(pdev); + + disable_irq_wake(ipcc->irq); + irq_domain_remove(ipcc->irq_domain); + + return 0; +} + +static const struct of_device_id qcom_ipcc_of_match[] = { + { .compatible = "qcom,ipcc"}, + {} +}; +MODULE_DEVICE_TABLE(of, qcom_ipcc_of_match); + +static const struct dev_pm_ops qcom_ipcc_dev_pm_ops = { + NOIRQ_SYSTEM_SLEEP_PM_OPS(NULL, qcom_ipcc_pm_resume) +}; + +static struct platform_driver qcom_ipcc_driver = { + .probe = qcom_ipcc_probe, + .remove = qcom_ipcc_remove, + .driver = { + .name = "qcom-ipcc", + .of_match_table = qcom_ipcc_of_match, + .suppress_bind_attrs = true, + .pm = pm_sleep_ptr(&qcom_ipcc_dev_pm_ops), + }, +}; + +static int __init qcom_ipcc_init(void) +{ + return platform_driver_register(&qcom_ipcc_driver); +} +arch_initcall(qcom_ipcc_init); + +MODULE_AUTHOR("Venkata Narendra Kumar Gutta "); +MODULE_AUTHOR("Manivannan Sadhasivam "); +MODULE_DESCRIPTION("Qualcomm Technologies, Inc. IPCC driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3