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/virtio_bt.c | 432 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 432 insertions(+) create mode 100644 drivers/bluetooth/virtio_bt.c (limited to 'drivers/bluetooth/virtio_bt.c') diff --git a/drivers/bluetooth/virtio_bt.c b/drivers/bluetooth/virtio_bt.c new file mode 100644 index 000000000..c570c45d1 --- /dev/null +++ b/drivers/bluetooth/virtio_bt.c @@ -0,0 +1,432 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include +#include +#include + +#include +#include + +#include +#include + +#define VERSION "0.1" + +enum { + VIRTBT_VQ_TX, + VIRTBT_VQ_RX, + VIRTBT_NUM_VQS, +}; + +struct virtio_bluetooth { + struct virtio_device *vdev; + struct virtqueue *vqs[VIRTBT_NUM_VQS]; + struct work_struct rx; + struct hci_dev *hdev; +}; + +static int virtbt_add_inbuf(struct virtio_bluetooth *vbt) +{ + struct virtqueue *vq = vbt->vqs[VIRTBT_VQ_RX]; + struct scatterlist sg[1]; + struct sk_buff *skb; + int err; + + skb = alloc_skb(1000, GFP_KERNEL); + if (!skb) + return -ENOMEM; + + sg_init_one(sg, skb->data, 1000); + + err = virtqueue_add_inbuf(vq, sg, 1, skb, GFP_KERNEL); + if (err < 0) { + kfree_skb(skb); + return err; + } + + return 0; +} + +static int virtbt_open(struct hci_dev *hdev) +{ + return 0; +} + +static int virtbt_open_vdev(struct virtio_bluetooth *vbt) +{ + if (virtbt_add_inbuf(vbt) < 0) + return -EIO; + + virtqueue_kick(vbt->vqs[VIRTBT_VQ_RX]); + return 0; +} + +static int virtbt_close(struct hci_dev *hdev) +{ + return 0; +} + +static int virtbt_close_vdev(struct virtio_bluetooth *vbt) +{ + int i; + + cancel_work_sync(&vbt->rx); + + for (i = 0; i < ARRAY_SIZE(vbt->vqs); i++) { + struct virtqueue *vq = vbt->vqs[i]; + struct sk_buff *skb; + + while ((skb = virtqueue_detach_unused_buf(vq))) + kfree_skb(skb); + } + + return 0; +} + +static int virtbt_flush(struct hci_dev *hdev) +{ + return 0; +} + +static int virtbt_send_frame(struct hci_dev *hdev, struct sk_buff *skb) +{ + struct virtio_bluetooth *vbt = hci_get_drvdata(hdev); + struct scatterlist sg[1]; + int err; + + memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); + + sg_init_one(sg, skb->data, skb->len); + err = virtqueue_add_outbuf(vbt->vqs[VIRTBT_VQ_TX], sg, 1, skb, + GFP_KERNEL); + if (err) { + kfree_skb(skb); + return err; + } + + virtqueue_kick(vbt->vqs[VIRTBT_VQ_TX]); + return 0; +} + +static int virtbt_setup_zephyr(struct hci_dev *hdev) +{ + struct sk_buff *skb; + + /* Read Build Information */ + skb = __hci_cmd_sync(hdev, 0xfc08, 0, NULL, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) + return PTR_ERR(skb); + + bt_dev_info(hdev, "%s", (char *)(skb->data + 1)); + + hci_set_fw_info(hdev, "%s", skb->data + 1); + + kfree_skb(skb); + return 0; +} + +static int virtbt_set_bdaddr_zephyr(struct hci_dev *hdev, + const bdaddr_t *bdaddr) +{ + struct sk_buff *skb; + + /* Write BD_ADDR */ + skb = __hci_cmd_sync(hdev, 0xfc06, 6, bdaddr, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) + return PTR_ERR(skb); + + kfree_skb(skb); + return 0; +} + +static int virtbt_setup_intel(struct hci_dev *hdev) +{ + struct sk_buff *skb; + + /* Intel Read Version */ + skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_CMD_TIMEOUT); + if (IS_ERR(skb)) + return PTR_ERR(skb); + + kfree_skb(skb); + return 0; +} + +static int virtbt_set_bdaddr_intel(struct hci_dev *hdev, const bdaddr_t *bdaddr) +{ + struct sk_buff *skb; + + /* Intel Write BD Address */ + skb = __hci_cmd_sync(hdev, 0xfc31, 6, bdaddr, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) + return PTR_ERR(skb); + + kfree_skb(skb); + return 0; +} + +static int virtbt_setup_realtek(struct hci_dev *hdev) +{ + struct sk_buff *skb; + + /* Read ROM Version */ + skb = __hci_cmd_sync(hdev, 0xfc6d, 0, NULL, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) + return PTR_ERR(skb); + + bt_dev_info(hdev, "ROM version %u", *((__u8 *) (skb->data + 1))); + + kfree_skb(skb); + return 0; +} + +static int virtbt_shutdown_generic(struct hci_dev *hdev) +{ + struct sk_buff *skb; + + /* Reset */ + skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) + return PTR_ERR(skb); + + kfree_skb(skb); + return 0; +} + +static void virtbt_rx_handle(struct virtio_bluetooth *vbt, struct sk_buff *skb) +{ + __u8 pkt_type; + + pkt_type = *((__u8 *) skb->data); + skb_pull(skb, 1); + + switch (pkt_type) { + case HCI_EVENT_PKT: + case HCI_ACLDATA_PKT: + case HCI_SCODATA_PKT: + case HCI_ISODATA_PKT: + hci_skb_pkt_type(skb) = pkt_type; + hci_recv_frame(vbt->hdev, skb); + break; + default: + kfree_skb(skb); + break; + } +} + +static void virtbt_rx_work(struct work_struct *work) +{ + struct virtio_bluetooth *vbt = container_of(work, + struct virtio_bluetooth, rx); + struct sk_buff *skb; + unsigned int len; + + skb = virtqueue_get_buf(vbt->vqs[VIRTBT_VQ_RX], &len); + if (!skb) + return; + + skb_put(skb, len); + virtbt_rx_handle(vbt, skb); + + if (virtbt_add_inbuf(vbt) < 0) + return; + + virtqueue_kick(vbt->vqs[VIRTBT_VQ_RX]); +} + +static void virtbt_tx_done(struct virtqueue *vq) +{ + struct sk_buff *skb; + unsigned int len; + + while ((skb = virtqueue_get_buf(vq, &len))) + kfree_skb(skb); +} + +static void virtbt_rx_done(struct virtqueue *vq) +{ + struct virtio_bluetooth *vbt = vq->vdev->priv; + + schedule_work(&vbt->rx); +} + +static int virtbt_probe(struct virtio_device *vdev) +{ + vq_callback_t *callbacks[VIRTBT_NUM_VQS] = { + [VIRTBT_VQ_TX] = virtbt_tx_done, + [VIRTBT_VQ_RX] = virtbt_rx_done, + }; + const char *names[VIRTBT_NUM_VQS] = { + [VIRTBT_VQ_TX] = "tx", + [VIRTBT_VQ_RX] = "rx", + }; + struct virtio_bluetooth *vbt; + struct hci_dev *hdev; + int err; + __u8 type; + + if (!virtio_has_feature(vdev, VIRTIO_F_VERSION_1)) + return -ENODEV; + + type = virtio_cread8(vdev, offsetof(struct virtio_bt_config, type)); + + switch (type) { + case VIRTIO_BT_CONFIG_TYPE_PRIMARY: + case VIRTIO_BT_CONFIG_TYPE_AMP: + break; + default: + return -EINVAL; + } + + vbt = kzalloc(sizeof(*vbt), GFP_KERNEL); + if (!vbt) + return -ENOMEM; + + vdev->priv = vbt; + vbt->vdev = vdev; + + INIT_WORK(&vbt->rx, virtbt_rx_work); + + err = virtio_find_vqs(vdev, VIRTBT_NUM_VQS, vbt->vqs, callbacks, + names, NULL); + if (err) + return err; + + hdev = hci_alloc_dev(); + if (!hdev) { + err = -ENOMEM; + goto failed; + } + + vbt->hdev = hdev; + + hdev->bus = HCI_VIRTIO; + hdev->dev_type = type; + hci_set_drvdata(hdev, vbt); + + hdev->open = virtbt_open; + hdev->close = virtbt_close; + hdev->flush = virtbt_flush; + hdev->send = virtbt_send_frame; + + if (virtio_has_feature(vdev, VIRTIO_BT_F_VND_HCI)) { + __u16 vendor; + + if (virtio_has_feature(vdev, VIRTIO_BT_F_CONFIG_V2)) + virtio_cread(vdev, struct virtio_bt_config_v2, + vendor, &vendor); + else + virtio_cread(vdev, struct virtio_bt_config, + vendor, &vendor); + + switch (vendor) { + case VIRTIO_BT_CONFIG_VENDOR_ZEPHYR: + hdev->manufacturer = 1521; + hdev->setup = virtbt_setup_zephyr; + hdev->shutdown = virtbt_shutdown_generic; + hdev->set_bdaddr = virtbt_set_bdaddr_zephyr; + break; + + case VIRTIO_BT_CONFIG_VENDOR_INTEL: + hdev->manufacturer = 2; + hdev->setup = virtbt_setup_intel; + hdev->shutdown = virtbt_shutdown_generic; + hdev->set_bdaddr = virtbt_set_bdaddr_intel; + set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks); + set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks); + set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks); + break; + + case VIRTIO_BT_CONFIG_VENDOR_REALTEK: + hdev->manufacturer = 93; + hdev->setup = virtbt_setup_realtek; + hdev->shutdown = virtbt_shutdown_generic; + set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks); + set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks); + break; + } + } + + if (virtio_has_feature(vdev, VIRTIO_BT_F_MSFT_EXT)) { + __u16 msft_opcode; + + if (virtio_has_feature(vdev, VIRTIO_BT_F_CONFIG_V2)) + virtio_cread(vdev, struct virtio_bt_config_v2, + msft_opcode, &msft_opcode); + else + virtio_cread(vdev, struct virtio_bt_config, + msft_opcode, &msft_opcode); + + hci_set_msft_opcode(hdev, msft_opcode); + } + + if (virtio_has_feature(vdev, VIRTIO_BT_F_AOSP_EXT)) + hci_set_aosp_capable(hdev); + + if (hci_register_dev(hdev) < 0) { + hci_free_dev(hdev); + err = -EBUSY; + goto failed; + } + + virtio_device_ready(vdev); + err = virtbt_open_vdev(vbt); + if (err) + goto open_failed; + + return 0; + +open_failed: + hci_free_dev(hdev); +failed: + vdev->config->del_vqs(vdev); + return err; +} + +static void virtbt_remove(struct virtio_device *vdev) +{ + struct virtio_bluetooth *vbt = vdev->priv; + struct hci_dev *hdev = vbt->hdev; + + hci_unregister_dev(hdev); + virtio_reset_device(vdev); + virtbt_close_vdev(vbt); + + hci_free_dev(hdev); + vbt->hdev = NULL; + + vdev->config->del_vqs(vdev); + kfree(vbt); +} + +static struct virtio_device_id virtbt_table[] = { + { VIRTIO_ID_BT, VIRTIO_DEV_ANY_ID }, + { 0 }, +}; + +MODULE_DEVICE_TABLE(virtio, virtbt_table); + +static const unsigned int virtbt_features[] = { + VIRTIO_BT_F_VND_HCI, + VIRTIO_BT_F_MSFT_EXT, + VIRTIO_BT_F_AOSP_EXT, + VIRTIO_BT_F_CONFIG_V2, +}; + +static struct virtio_driver virtbt_driver = { + .driver.name = KBUILD_MODNAME, + .driver.owner = THIS_MODULE, + .feature_table = virtbt_features, + .feature_table_size = ARRAY_SIZE(virtbt_features), + .id_table = virtbt_table, + .probe = virtbt_probe, + .remove = virtbt_remove, +}; + +module_virtio_driver(virtbt_driver); + +MODULE_AUTHOR("Marcel Holtmann "); +MODULE_DESCRIPTION("Generic Bluetooth VIRTIO driver ver " VERSION); +MODULE_VERSION(VERSION); +MODULE_LICENSE("GPL"); -- cgit v1.2.3