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/bluetooth/hci_serdev.c | 418 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 418 insertions(+) create mode 100644 drivers/bluetooth/hci_serdev.c (limited to 'drivers/bluetooth/hci_serdev.c') diff --git a/drivers/bluetooth/hci_serdev.c b/drivers/bluetooth/hci_serdev.c new file mode 100644 index 000000000..f16fd79bc --- /dev/null +++ b/drivers/bluetooth/hci_serdev.c @@ -0,0 +1,418 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Bluetooth HCI serdev driver lib + * + * Copyright (C) 2017 Linaro, Ltd., Rob Herring + * + * Based on hci_ldisc.c: + * + * Copyright (C) 2000-2001 Qualcomm Incorporated + * Copyright (C) 2002-2003 Maxim Krasnyansky + * Copyright (C) 2004-2005 Marcel Holtmann + */ + +#include +#include +#include +#include + +#include +#include + +#include "hci_uart.h" + +static inline void hci_uart_tx_complete(struct hci_uart *hu, int pkt_type) +{ + struct hci_dev *hdev = hu->hdev; + + /* Update HCI stat counters */ + switch (pkt_type) { + case HCI_COMMAND_PKT: + hdev->stat.cmd_tx++; + break; + + case HCI_ACLDATA_PKT: + hdev->stat.acl_tx++; + break; + + case HCI_SCODATA_PKT: + hdev->stat.sco_tx++; + break; + } +} + +static inline struct sk_buff *hci_uart_dequeue(struct hci_uart *hu) +{ + struct sk_buff *skb = hu->tx_skb; + + if (!skb) { + if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) + skb = hu->proto->dequeue(hu); + } else + hu->tx_skb = NULL; + + return skb; +} + +static void hci_uart_write_work(struct work_struct *work) +{ + struct hci_uart *hu = container_of(work, struct hci_uart, write_work); + struct serdev_device *serdev = hu->serdev; + struct hci_dev *hdev = hu->hdev; + struct sk_buff *skb; + + /* REVISIT: + * should we cope with bad skbs or ->write() returning an error value? + */ + do { + clear_bit(HCI_UART_TX_WAKEUP, &hu->tx_state); + + while ((skb = hci_uart_dequeue(hu))) { + int len; + + len = serdev_device_write_buf(serdev, + skb->data, skb->len); + hdev->stat.byte_tx += len; + + skb_pull(skb, len); + if (skb->len) { + hu->tx_skb = skb; + break; + } + + hci_uart_tx_complete(hu, hci_skb_pkt_type(skb)); + kfree_skb(skb); + } + + clear_bit(HCI_UART_SENDING, &hu->tx_state); + } while (test_bit(HCI_UART_TX_WAKEUP, &hu->tx_state)); +} + +/* ------- Interface to HCI layer ------ */ + +/* Reset device */ +static int hci_uart_flush(struct hci_dev *hdev) +{ + struct hci_uart *hu = hci_get_drvdata(hdev); + + BT_DBG("hdev %p serdev %p", hdev, hu->serdev); + + if (hu->tx_skb) { + kfree_skb(hu->tx_skb); hu->tx_skb = NULL; + } + + /* Flush any pending characters in the driver and discipline. */ + serdev_device_write_flush(hu->serdev); + + if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) + hu->proto->flush(hu); + + return 0; +} + +/* Initialize device */ +static int hci_uart_open(struct hci_dev *hdev) +{ + struct hci_uart *hu = hci_get_drvdata(hdev); + int err; + + BT_DBG("%s %p", hdev->name, hdev); + + /* When Quirk HCI_QUIRK_NON_PERSISTENT_SETUP is set by + * driver, BT SoC is completely turned OFF during + * BT OFF. Upon next BT ON UART port should be opened. + */ + if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) { + err = serdev_device_open(hu->serdev); + if (err) + return err; + set_bit(HCI_UART_PROTO_READY, &hu->flags); + } + + /* Undo clearing this from hci_uart_close() */ + hdev->flush = hci_uart_flush; + + return 0; +} + +/* Close device */ +static int hci_uart_close(struct hci_dev *hdev) +{ + struct hci_uart *hu = hci_get_drvdata(hdev); + + BT_DBG("hdev %p", hdev); + + if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) + return 0; + + hci_uart_flush(hdev); + hdev->flush = NULL; + + /* When QUIRK HCI_QUIRK_NON_PERSISTENT_SETUP is set by driver, + * BT SOC is completely powered OFF during BT OFF, holding port + * open may drain the battery. + */ + if (test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) { + clear_bit(HCI_UART_PROTO_READY, &hu->flags); + serdev_device_close(hu->serdev); + } + + return 0; +} + +/* Send frames from HCI layer */ +static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb) +{ + struct hci_uart *hu = hci_get_drvdata(hdev); + + BT_DBG("%s: type %d len %d", hdev->name, hci_skb_pkt_type(skb), + skb->len); + + hu->proto->enqueue(hu, skb); + + hci_uart_tx_wakeup(hu); + + return 0; +} + +static int hci_uart_setup(struct hci_dev *hdev) +{ + struct hci_uart *hu = hci_get_drvdata(hdev); + struct hci_rp_read_local_version *ver; + struct sk_buff *skb; + unsigned int speed; + int err; + + /* Init speed if any */ + if (hu->init_speed) + speed = hu->init_speed; + else if (hu->proto->init_speed) + speed = hu->proto->init_speed; + else + speed = 0; + + if (speed) + serdev_device_set_baudrate(hu->serdev, speed); + + /* Operational speed if any */ + if (hu->oper_speed) + speed = hu->oper_speed; + else if (hu->proto->oper_speed) + speed = hu->proto->oper_speed; + else + speed = 0; + + if (hu->proto->set_baudrate && speed) { + err = hu->proto->set_baudrate(hu, speed); + if (err) + bt_dev_err(hdev, "Failed to set baudrate"); + else + serdev_device_set_baudrate(hu->serdev, speed); + } + + if (hu->proto->setup) + return hu->proto->setup(hu); + + if (!test_bit(HCI_UART_VND_DETECT, &hu->hdev_flags)) + return 0; + + skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL, + HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + bt_dev_err(hdev, "Reading local version info failed (%ld)", + PTR_ERR(skb)); + return 0; + } + + if (skb->len != sizeof(*ver)) + bt_dev_err(hdev, "Event length mismatch for version info"); + + kfree_skb(skb); + return 0; +} + +/* Check if the device is wakeable */ +static bool hci_uart_wakeup(struct hci_dev *hdev) +{ + /* HCI UART devices are assumed to be wakeable by default. + * Implement wakeup callback to override this behavior. + */ + return true; +} + +/** hci_uart_write_wakeup - transmit buffer wakeup + * @serdev: serial device + * + * This function is called by the serdev framework when it accepts + * more data being sent. + */ +static void hci_uart_write_wakeup(struct serdev_device *serdev) +{ + struct hci_uart *hu = serdev_device_get_drvdata(serdev); + + BT_DBG(""); + + if (!hu || serdev != hu->serdev) { + WARN_ON(1); + return; + } + + if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) + hci_uart_tx_wakeup(hu); +} + +/** hci_uart_receive_buf - receive buffer wakeup + * @serdev: serial device + * @data: pointer to received data + * @count: count of received data in bytes + * + * This function is called by the serdev framework when it received data + * in the RX buffer. + * + * Return: number of processed bytes + */ +static int hci_uart_receive_buf(struct serdev_device *serdev, const u8 *data, + size_t count) +{ + struct hci_uart *hu = serdev_device_get_drvdata(serdev); + + if (!hu || serdev != hu->serdev) { + WARN_ON(1); + return 0; + } + + if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) + return 0; + + /* It does not need a lock here as it is already protected by a mutex in + * tty caller + */ + hu->proto->recv(hu, data, count); + + if (hu->hdev) + hu->hdev->stat.byte_rx += count; + + return count; +} + +static const struct serdev_device_ops hci_serdev_client_ops = { + .receive_buf = hci_uart_receive_buf, + .write_wakeup = hci_uart_write_wakeup, +}; + +int hci_uart_register_device(struct hci_uart *hu, + const struct hci_uart_proto *p) +{ + int err; + struct hci_dev *hdev; + + BT_DBG(""); + + serdev_device_set_client_ops(hu->serdev, &hci_serdev_client_ops); + + if (percpu_init_rwsem(&hu->proto_lock)) + return -ENOMEM; + + err = serdev_device_open(hu->serdev); + if (err) + goto err_rwsem; + + err = p->open(hu); + if (err) + goto err_open; + + hu->proto = p; + set_bit(HCI_UART_PROTO_READY, &hu->flags); + + /* Initialize and register HCI device */ + hdev = hci_alloc_dev(); + if (!hdev) { + BT_ERR("Can't allocate HCI device"); + err = -ENOMEM; + goto err_alloc; + } + + hu->hdev = hdev; + + hdev->bus = HCI_UART; + hci_set_drvdata(hdev, hu); + + INIT_WORK(&hu->init_ready, hci_uart_init_work); + INIT_WORK(&hu->write_work, hci_uart_write_work); + + /* Only when vendor specific setup callback is provided, consider + * the manufacturer information valid. This avoids filling in the + * value for Ericsson when nothing is specified. + */ + if (hu->proto->setup) + hdev->manufacturer = hu->proto->manufacturer; + + hdev->open = hci_uart_open; + hdev->close = hci_uart_close; + hdev->flush = hci_uart_flush; + hdev->send = hci_uart_send_frame; + hdev->setup = hci_uart_setup; + if (!hdev->wakeup) + hdev->wakeup = hci_uart_wakeup; + SET_HCIDEV_DEV(hdev, &hu->serdev->dev); + + if (test_bit(HCI_UART_NO_SUSPEND_NOTIFIER, &hu->flags)) + set_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks); + + if (test_bit(HCI_UART_RAW_DEVICE, &hu->hdev_flags)) + set_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks); + + if (test_bit(HCI_UART_EXT_CONFIG, &hu->hdev_flags)) + set_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks); + + if (test_bit(HCI_UART_CREATE_AMP, &hu->hdev_flags)) + hdev->dev_type = HCI_AMP; + else + hdev->dev_type = HCI_PRIMARY; + + if (test_bit(HCI_UART_INIT_PENDING, &hu->hdev_flags)) + return 0; + + if (hci_register_dev(hdev) < 0) { + BT_ERR("Can't register HCI device"); + err = -ENODEV; + goto err_register; + } + + set_bit(HCI_UART_REGISTERED, &hu->flags); + + return 0; + +err_register: + hci_free_dev(hdev); +err_alloc: + clear_bit(HCI_UART_PROTO_READY, &hu->flags); + p->close(hu); +err_open: + serdev_device_close(hu->serdev); +err_rwsem: + percpu_free_rwsem(&hu->proto_lock); + return err; +} +EXPORT_SYMBOL_GPL(hci_uart_register_device); + +void hci_uart_unregister_device(struct hci_uart *hu) +{ + struct hci_dev *hdev = hu->hdev; + + cancel_work_sync(&hu->init_ready); + if (test_bit(HCI_UART_REGISTERED, &hu->flags)) + hci_unregister_dev(hdev); + hci_free_dev(hdev); + + cancel_work_sync(&hu->write_work); + + hu->proto->close(hu); + + if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) { + clear_bit(HCI_UART_PROTO_READY, &hu->flags); + serdev_device_close(hu->serdev); + } + percpu_free_rwsem(&hu->proto_lock); +} +EXPORT_SYMBOL_GPL(hci_uart_unregister_device); -- cgit v1.2.3