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/usb/misc/qcom_eud.c | 251 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 251 insertions(+) create mode 100644 drivers/usb/misc/qcom_eud.c (limited to 'drivers/usb/misc/qcom_eud.c') diff --git a/drivers/usb/misc/qcom_eud.c b/drivers/usb/misc/qcom_eud.c new file mode 100644 index 000000000..b7f13df00 --- /dev/null +++ b/drivers/usb/misc/qcom_eud.c @@ -0,0 +1,251 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2015-2021, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define EUD_REG_INT1_EN_MASK 0x0024 +#define EUD_REG_INT_STATUS_1 0x0044 +#define EUD_REG_CTL_OUT_1 0x0074 +#define EUD_REG_VBUS_INT_CLR 0x0080 +#define EUD_REG_CSR_EUD_EN 0x1014 +#define EUD_REG_SW_ATTACH_DET 0x1018 +#define EUD_REG_EUD_EN2 0x0000 + +#define EUD_ENABLE BIT(0) +#define EUD_INT_PET_EUD BIT(0) +#define EUD_INT_VBUS BIT(2) +#define EUD_INT_SAFE_MODE BIT(4) +#define EUD_INT_ALL (EUD_INT_VBUS | EUD_INT_SAFE_MODE) + +struct eud_chip { + struct device *dev; + struct usb_role_switch *role_sw; + void __iomem *base; + void __iomem *mode_mgr; + unsigned int int_status; + int irq; + bool enabled; + bool usb_attached; +}; + +static int enable_eud(struct eud_chip *priv) +{ + writel(EUD_ENABLE, priv->base + EUD_REG_CSR_EUD_EN); + writel(EUD_INT_VBUS | EUD_INT_SAFE_MODE, + priv->base + EUD_REG_INT1_EN_MASK); + writel(1, priv->mode_mgr + EUD_REG_EUD_EN2); + + return usb_role_switch_set_role(priv->role_sw, USB_ROLE_DEVICE); +} + +static void disable_eud(struct eud_chip *priv) +{ + writel(0, priv->base + EUD_REG_CSR_EUD_EN); + writel(0, priv->mode_mgr + EUD_REG_EUD_EN2); +} + +static ssize_t enable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct eud_chip *chip = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%d\n", chip->enabled); +} + +static ssize_t enable_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct eud_chip *chip = dev_get_drvdata(dev); + bool enable; + int ret; + + if (kstrtobool(buf, &enable)) + return -EINVAL; + + if (enable) { + ret = enable_eud(chip); + if (!ret) + chip->enabled = enable; + else + disable_eud(chip); + } else { + disable_eud(chip); + } + + return count; +} + +static DEVICE_ATTR_RW(enable); + +static struct attribute *eud_attrs[] = { + &dev_attr_enable.attr, + NULL, +}; +ATTRIBUTE_GROUPS(eud); + +static void usb_attach_detach(struct eud_chip *chip) +{ + u32 reg; + + /* read ctl_out_1[4] to find USB attach or detach event */ + reg = readl(chip->base + EUD_REG_CTL_OUT_1); + chip->usb_attached = reg & EUD_INT_SAFE_MODE; +} + +static void pet_eud(struct eud_chip *chip) +{ + u32 reg; + int ret; + + /* When the EUD_INT_PET_EUD in SW_ATTACH_DET is set, the cable has been + * disconnected and we need to detach the pet to check if EUD is in safe + * mode before attaching again. + */ + reg = readl(chip->base + EUD_REG_SW_ATTACH_DET); + if (reg & EUD_INT_PET_EUD) { + /* Detach & Attach pet for EUD */ + writel(0, chip->base + EUD_REG_SW_ATTACH_DET); + /* Delay to make sure detach pet is done before attach pet */ + ret = readl_poll_timeout(chip->base + EUD_REG_SW_ATTACH_DET, + reg, (reg == 0), 1, 100); + if (ret) { + dev_err(chip->dev, "Detach pet failed\n"); + return; + } + } + /* Attach pet for EUD */ + writel(EUD_INT_PET_EUD, chip->base + EUD_REG_SW_ATTACH_DET); +} + +static irqreturn_t handle_eud_irq(int irq, void *data) +{ + struct eud_chip *chip = data; + u32 reg; + + reg = readl(chip->base + EUD_REG_INT_STATUS_1); + switch (reg & EUD_INT_ALL) { + case EUD_INT_VBUS: + usb_attach_detach(chip); + return IRQ_WAKE_THREAD; + case EUD_INT_SAFE_MODE: + pet_eud(chip); + return IRQ_HANDLED; + default: + return IRQ_NONE; + } +} + +static irqreturn_t handle_eud_irq_thread(int irq, void *data) +{ + struct eud_chip *chip = data; + int ret; + + if (chip->usb_attached) + ret = usb_role_switch_set_role(chip->role_sw, USB_ROLE_DEVICE); + else + ret = usb_role_switch_set_role(chip->role_sw, USB_ROLE_HOST); + if (ret) + dev_err(chip->dev, "failed to set role switch\n"); + + /* set and clear vbus_int_clr[0] to clear interrupt */ + writel(BIT(0), chip->base + EUD_REG_VBUS_INT_CLR); + writel(0, chip->base + EUD_REG_VBUS_INT_CLR); + + return IRQ_HANDLED; +} + +static void eud_role_switch_release(void *data) +{ + struct eud_chip *chip = data; + + usb_role_switch_put(chip->role_sw); +} + +static int eud_probe(struct platform_device *pdev) +{ + struct eud_chip *chip; + int ret; + + chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->dev = &pdev->dev; + + chip->role_sw = usb_role_switch_get(&pdev->dev); + if (IS_ERR(chip->role_sw)) + return dev_err_probe(chip->dev, PTR_ERR(chip->role_sw), + "failed to get role switch\n"); + + ret = devm_add_action_or_reset(chip->dev, eud_role_switch_release, chip); + if (ret) + return dev_err_probe(chip->dev, ret, + "failed to add role switch release action\n"); + + chip->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(chip->base)) + return PTR_ERR(chip->base); + + chip->mode_mgr = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(chip->mode_mgr)) + return PTR_ERR(chip->mode_mgr); + + chip->irq = platform_get_irq(pdev, 0); + ret = devm_request_threaded_irq(&pdev->dev, chip->irq, handle_eud_irq, + handle_eud_irq_thread, IRQF_ONESHOT, NULL, chip); + if (ret) + return dev_err_probe(chip->dev, ret, "failed to allocate irq\n"); + + enable_irq_wake(chip->irq); + + platform_set_drvdata(pdev, chip); + + return 0; +} + +static int eud_remove(struct platform_device *pdev) +{ + struct eud_chip *chip = platform_get_drvdata(pdev); + + if (chip->enabled) + disable_eud(chip); + + device_init_wakeup(&pdev->dev, false); + disable_irq_wake(chip->irq); + + return 0; +} + +static const struct of_device_id eud_dt_match[] = { + { .compatible = "qcom,sc7280-eud" }, + { } +}; +MODULE_DEVICE_TABLE(of, eud_dt_match); + +static struct platform_driver eud_driver = { + .probe = eud_probe, + .remove = eud_remove, + .driver = { + .name = "qcom_eud", + .dev_groups = eud_groups, + .of_match_table = eud_dt_match, + }, +}; +module_platform_driver(eud_driver); + +MODULE_DESCRIPTION("QTI EUD driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3