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/tty/serial/tegra-tcu.c | 303 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 303 insertions(+) create mode 100644 drivers/tty/serial/tegra-tcu.c (limited to 'drivers/tty/serial/tegra-tcu.c') diff --git a/drivers/tty/serial/tegra-tcu.c b/drivers/tty/serial/tegra-tcu.c new file mode 100644 index 000000000..23500b342 --- /dev/null +++ b/drivers/tty/serial/tegra-tcu.c @@ -0,0 +1,303 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define TCU_MBOX_BYTE(i, x) ((x) << (i * 8)) +#define TCU_MBOX_BYTE_V(x, i) (((x) >> (i * 8)) & 0xff) +#define TCU_MBOX_NUM_BYTES(x) ((x) << 24) +#define TCU_MBOX_NUM_BYTES_V(x) (((x) >> 24) & 0x3) + +struct tegra_tcu { + struct uart_driver driver; +#if IS_ENABLED(CONFIG_SERIAL_TEGRA_TCU_CONSOLE) + struct console console; +#endif + struct uart_port port; + + struct mbox_client tx_client, rx_client; + struct mbox_chan *tx, *rx; +}; + +static unsigned int tegra_tcu_uart_tx_empty(struct uart_port *port) +{ + return TIOCSER_TEMT; +} + +static void tegra_tcu_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ +} + +static unsigned int tegra_tcu_uart_get_mctrl(struct uart_port *port) +{ + return 0; +} + +static void tegra_tcu_uart_stop_tx(struct uart_port *port) +{ +} + +static void tegra_tcu_write_one(struct tegra_tcu *tcu, u32 value, + unsigned int count) +{ + void *msg; + + value |= TCU_MBOX_NUM_BYTES(count); + msg = (void *)(unsigned long)value; + mbox_send_message(tcu->tx, msg); + mbox_flush(tcu->tx, 1000); +} + +static void tegra_tcu_write(struct tegra_tcu *tcu, const char *s, + unsigned int count) +{ + unsigned int written = 0, i = 0; + bool insert_nl = false; + u32 value = 0; + + while (i < count) { + if (insert_nl) { + value |= TCU_MBOX_BYTE(written++, '\n'); + insert_nl = false; + i++; + } else if (s[i] == '\n') { + value |= TCU_MBOX_BYTE(written++, '\r'); + insert_nl = true; + } else { + value |= TCU_MBOX_BYTE(written++, s[i++]); + } + + if (written == 3) { + tegra_tcu_write_one(tcu, value, 3); + value = written = 0; + } + } + + if (written) + tegra_tcu_write_one(tcu, value, written); +} + +static void tegra_tcu_uart_start_tx(struct uart_port *port) +{ + struct tegra_tcu *tcu = port->private_data; + struct circ_buf *xmit = &port->state->xmit; + unsigned long count; + + for (;;) { + count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); + if (!count) + break; + + tegra_tcu_write(tcu, &xmit->buf[xmit->tail], count); + uart_xmit_advance(port, count); + } + + uart_write_wakeup(port); +} + +static void tegra_tcu_uart_stop_rx(struct uart_port *port) +{ +} + +static void tegra_tcu_uart_break_ctl(struct uart_port *port, int ctl) +{ +} + +static int tegra_tcu_uart_startup(struct uart_port *port) +{ + return 0; +} + +static void tegra_tcu_uart_shutdown(struct uart_port *port) +{ +} + +static void tegra_tcu_uart_set_termios(struct uart_port *port, + struct ktermios *new, + const struct ktermios *old) +{ +} + +static const struct uart_ops tegra_tcu_uart_ops = { + .tx_empty = tegra_tcu_uart_tx_empty, + .set_mctrl = tegra_tcu_uart_set_mctrl, + .get_mctrl = tegra_tcu_uart_get_mctrl, + .stop_tx = tegra_tcu_uart_stop_tx, + .start_tx = tegra_tcu_uart_start_tx, + .stop_rx = tegra_tcu_uart_stop_rx, + .break_ctl = tegra_tcu_uart_break_ctl, + .startup = tegra_tcu_uart_startup, + .shutdown = tegra_tcu_uart_shutdown, + .set_termios = tegra_tcu_uart_set_termios, +}; + +#if IS_ENABLED(CONFIG_SERIAL_TEGRA_TCU_CONSOLE) +static void tegra_tcu_console_write(struct console *cons, const char *s, + unsigned int count) +{ + struct tegra_tcu *tcu = container_of(cons, struct tegra_tcu, console); + + tegra_tcu_write(tcu, s, count); +} + +static int tegra_tcu_console_setup(struct console *cons, char *options) +{ + return 0; +} +#endif + +static void tegra_tcu_receive(struct mbox_client *cl, void *msg) +{ + struct tegra_tcu *tcu = container_of(cl, struct tegra_tcu, rx_client); + struct tty_port *port = &tcu->port.state->port; + u32 value = (u32)(unsigned long)msg; + unsigned int num_bytes, i; + + num_bytes = TCU_MBOX_NUM_BYTES_V(value); + + for (i = 0; i < num_bytes; i++) + tty_insert_flip_char(port, TCU_MBOX_BYTE_V(value, i), + TTY_NORMAL); + + tty_flip_buffer_push(port); +} + +static int tegra_tcu_probe(struct platform_device *pdev) +{ + struct uart_port *port; + struct tegra_tcu *tcu; + int err; + + tcu = devm_kzalloc(&pdev->dev, sizeof(*tcu), GFP_KERNEL); + if (!tcu) + return -ENOMEM; + + tcu->tx_client.dev = &pdev->dev; + tcu->rx_client.dev = &pdev->dev; + tcu->rx_client.rx_callback = tegra_tcu_receive; + + tcu->tx = mbox_request_channel_byname(&tcu->tx_client, "tx"); + if (IS_ERR(tcu->tx)) { + err = PTR_ERR(tcu->tx); + dev_err(&pdev->dev, "failed to get tx mailbox: %d\n", err); + return err; + } + +#if IS_ENABLED(CONFIG_SERIAL_TEGRA_TCU_CONSOLE) + /* setup the console */ + strcpy(tcu->console.name, "ttyTCU"); + tcu->console.device = uart_console_device; + tcu->console.flags = CON_PRINTBUFFER | CON_ANYTIME; + tcu->console.index = -1; + tcu->console.write = tegra_tcu_console_write; + tcu->console.setup = tegra_tcu_console_setup; + tcu->console.data = &tcu->driver; +#endif + + /* setup the driver */ + tcu->driver.owner = THIS_MODULE; + tcu->driver.driver_name = "tegra-tcu"; + tcu->driver.dev_name = "ttyTCU"; +#if IS_ENABLED(CONFIG_SERIAL_TEGRA_TCU_CONSOLE) + tcu->driver.cons = &tcu->console; +#endif + tcu->driver.nr = 1; + + err = uart_register_driver(&tcu->driver); + if (err) { + dev_err(&pdev->dev, "failed to register UART driver: %d\n", + err); + goto free_tx; + } + + /* setup the port */ + port = &tcu->port; + spin_lock_init(&port->lock); + port->dev = &pdev->dev; + port->type = PORT_TEGRA_TCU; + port->ops = &tegra_tcu_uart_ops; + port->fifosize = 1; + port->iotype = UPIO_MEM; + port->flags = UPF_BOOT_AUTOCONF; + port->private_data = tcu; + + err = uart_add_one_port(&tcu->driver, port); + if (err) { + dev_err(&pdev->dev, "failed to add UART port: %d\n", err); + goto unregister_uart; + } + + /* + * Request RX channel after creating port to ensure tcu->port + * is ready for any immediate incoming bytes. + */ + tcu->rx = mbox_request_channel_byname(&tcu->rx_client, "rx"); + if (IS_ERR(tcu->rx)) { + err = PTR_ERR(tcu->rx); + dev_err(&pdev->dev, "failed to get rx mailbox: %d\n", err); + goto remove_uart_port; + } + + platform_set_drvdata(pdev, tcu); +#if IS_ENABLED(CONFIG_SERIAL_TEGRA_TCU_CONSOLE) + register_console(&tcu->console); +#endif + + return 0; + +remove_uart_port: + uart_remove_one_port(&tcu->driver, &tcu->port); +unregister_uart: + uart_unregister_driver(&tcu->driver); +free_tx: + mbox_free_channel(tcu->tx); + + return err; +} + +static int tegra_tcu_remove(struct platform_device *pdev) +{ + struct tegra_tcu *tcu = platform_get_drvdata(pdev); + +#if IS_ENABLED(CONFIG_SERIAL_TEGRA_TCU_CONSOLE) + unregister_console(&tcu->console); +#endif + mbox_free_channel(tcu->rx); + uart_remove_one_port(&tcu->driver, &tcu->port); + uart_unregister_driver(&tcu->driver); + mbox_free_channel(tcu->tx); + + return 0; +} + +static const struct of_device_id tegra_tcu_match[] = { + { .compatible = "nvidia,tegra194-tcu" }, + { } +}; +MODULE_DEVICE_TABLE(of, tegra_tcu_match); + +static struct platform_driver tegra_tcu_driver = { + .driver = { + .name = "tegra-tcu", + .of_match_table = tegra_tcu_match, + }, + .probe = tegra_tcu_probe, + .remove = tegra_tcu_remove, +}; +module_platform_driver(tegra_tcu_driver); + +MODULE_AUTHOR("Mikko Perttunen "); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("NVIDIA Tegra Combined UART driver"); -- cgit v1.2.3