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/mailbox-test.c | 445 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 445 insertions(+) create mode 100644 drivers/mailbox/mailbox-test.c (limited to 'drivers/mailbox/mailbox-test.c') diff --git a/drivers/mailbox/mailbox-test.c b/drivers/mailbox/mailbox-test.c new file mode 100644 index 000000000..4555d678f --- /dev/null +++ b/drivers/mailbox/mailbox-test.c @@ -0,0 +1,445 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2015 ST Microelectronics + * + * Author: Lee Jones + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MBOX_MAX_SIG_LEN 8 +#define MBOX_MAX_MSG_LEN 128 +#define MBOX_BYTES_PER_LINE 16 +#define MBOX_HEXDUMP_LINE_LEN ((MBOX_BYTES_PER_LINE * 4) + 2) +#define MBOX_HEXDUMP_MAX_LEN (MBOX_HEXDUMP_LINE_LEN * \ + (MBOX_MAX_MSG_LEN / MBOX_BYTES_PER_LINE)) + +static bool mbox_data_ready; + +struct mbox_test_device { + struct device *dev; + void __iomem *tx_mmio; + void __iomem *rx_mmio; + struct mbox_chan *tx_channel; + struct mbox_chan *rx_channel; + char *rx_buffer; + char *signal; + char *message; + spinlock_t lock; + wait_queue_head_t waitq; + struct fasync_struct *async_queue; + struct dentry *root_debugfs_dir; +}; + +static ssize_t mbox_test_signal_write(struct file *filp, + const char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct mbox_test_device *tdev = filp->private_data; + + if (!tdev->tx_channel) { + dev_err(tdev->dev, "Channel cannot do Tx\n"); + return -EINVAL; + } + + if (count > MBOX_MAX_SIG_LEN) { + dev_err(tdev->dev, + "Signal length %zd greater than max allowed %d\n", + count, MBOX_MAX_SIG_LEN); + return -EINVAL; + } + + /* Only allocate memory if we need to */ + if (!tdev->signal) { + tdev->signal = kzalloc(MBOX_MAX_SIG_LEN, GFP_KERNEL); + if (!tdev->signal) + return -ENOMEM; + } + + if (copy_from_user(tdev->signal, userbuf, count)) { + kfree(tdev->signal); + tdev->signal = NULL; + return -EFAULT; + } + + return count; +} + +static const struct file_operations mbox_test_signal_ops = { + .write = mbox_test_signal_write, + .open = simple_open, + .llseek = generic_file_llseek, +}; + +static int mbox_test_message_fasync(int fd, struct file *filp, int on) +{ + struct mbox_test_device *tdev = filp->private_data; + + return fasync_helper(fd, filp, on, &tdev->async_queue); +} + +static ssize_t mbox_test_message_write(struct file *filp, + const char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct mbox_test_device *tdev = filp->private_data; + void *data; + int ret; + + if (!tdev->tx_channel) { + dev_err(tdev->dev, "Channel cannot do Tx\n"); + return -EINVAL; + } + + if (count > MBOX_MAX_MSG_LEN) { + dev_err(tdev->dev, + "Message length %zd greater than max allowed %d\n", + count, MBOX_MAX_MSG_LEN); + return -EINVAL; + } + + tdev->message = kzalloc(MBOX_MAX_MSG_LEN, GFP_KERNEL); + if (!tdev->message) + return -ENOMEM; + + ret = copy_from_user(tdev->message, userbuf, count); + if (ret) { + ret = -EFAULT; + goto out; + } + + /* + * A separate signal is only of use if there is + * MMIO to subsequently pass the message through + */ + if (tdev->tx_mmio && tdev->signal) { + print_hex_dump_bytes("Client: Sending: Signal: ", DUMP_PREFIX_ADDRESS, + tdev->signal, MBOX_MAX_SIG_LEN); + + data = tdev->signal; + } else + data = tdev->message; + + print_hex_dump_bytes("Client: Sending: Message: ", DUMP_PREFIX_ADDRESS, + tdev->message, MBOX_MAX_MSG_LEN); + + ret = mbox_send_message(tdev->tx_channel, data); + if (ret < 0) + dev_err(tdev->dev, "Failed to send message via mailbox\n"); + +out: + kfree(tdev->signal); + kfree(tdev->message); + tdev->signal = NULL; + + return ret < 0 ? ret : count; +} + +static bool mbox_test_message_data_ready(struct mbox_test_device *tdev) +{ + bool data_ready; + unsigned long flags; + + spin_lock_irqsave(&tdev->lock, flags); + data_ready = mbox_data_ready; + spin_unlock_irqrestore(&tdev->lock, flags); + + return data_ready; +} + +static ssize_t mbox_test_message_read(struct file *filp, char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct mbox_test_device *tdev = filp->private_data; + unsigned long flags; + char *touser, *ptr; + int l = 0; + int ret; + + DECLARE_WAITQUEUE(wait, current); + + touser = kzalloc(MBOX_HEXDUMP_MAX_LEN + 1, GFP_KERNEL); + if (!touser) + return -ENOMEM; + + if (!tdev->rx_channel) { + ret = snprintf(touser, 20, "\n"); + ret = simple_read_from_buffer(userbuf, count, ppos, + touser, ret); + goto kfree_err; + } + + add_wait_queue(&tdev->waitq, &wait); + + do { + __set_current_state(TASK_INTERRUPTIBLE); + + if (mbox_test_message_data_ready(tdev)) + break; + + if (filp->f_flags & O_NONBLOCK) { + ret = -EAGAIN; + goto waitq_err; + } + + if (signal_pending(current)) { + ret = -ERESTARTSYS; + goto waitq_err; + } + schedule(); + + } while (1); + + spin_lock_irqsave(&tdev->lock, flags); + + ptr = tdev->rx_buffer; + while (l < MBOX_HEXDUMP_MAX_LEN) { + hex_dump_to_buffer(ptr, + MBOX_BYTES_PER_LINE, + MBOX_BYTES_PER_LINE, 1, touser + l, + MBOX_HEXDUMP_LINE_LEN, true); + + ptr += MBOX_BYTES_PER_LINE; + l += MBOX_HEXDUMP_LINE_LEN; + *(touser + (l - 1)) = '\n'; + } + *(touser + l) = '\0'; + + memset(tdev->rx_buffer, 0, MBOX_MAX_MSG_LEN); + mbox_data_ready = false; + + spin_unlock_irqrestore(&tdev->lock, flags); + + ret = simple_read_from_buffer(userbuf, count, ppos, touser, MBOX_HEXDUMP_MAX_LEN); +waitq_err: + __set_current_state(TASK_RUNNING); + remove_wait_queue(&tdev->waitq, &wait); +kfree_err: + kfree(touser); + return ret; +} + +static __poll_t +mbox_test_message_poll(struct file *filp, struct poll_table_struct *wait) +{ + struct mbox_test_device *tdev = filp->private_data; + + poll_wait(filp, &tdev->waitq, wait); + + if (mbox_test_message_data_ready(tdev)) + return EPOLLIN | EPOLLRDNORM; + return 0; +} + +static const struct file_operations mbox_test_message_ops = { + .write = mbox_test_message_write, + .read = mbox_test_message_read, + .fasync = mbox_test_message_fasync, + .poll = mbox_test_message_poll, + .open = simple_open, + .llseek = generic_file_llseek, +}; + +static int mbox_test_add_debugfs(struct platform_device *pdev, + struct mbox_test_device *tdev) +{ + if (!debugfs_initialized()) + return 0; + + tdev->root_debugfs_dir = debugfs_create_dir(dev_name(&pdev->dev), NULL); + if (!tdev->root_debugfs_dir) { + dev_err(&pdev->dev, "Failed to create Mailbox debugfs\n"); + return -EINVAL; + } + + debugfs_create_file("message", 0600, tdev->root_debugfs_dir, + tdev, &mbox_test_message_ops); + + debugfs_create_file("signal", 0200, tdev->root_debugfs_dir, + tdev, &mbox_test_signal_ops); + + return 0; +} + +static void mbox_test_receive_message(struct mbox_client *client, void *message) +{ + struct mbox_test_device *tdev = dev_get_drvdata(client->dev); + unsigned long flags; + + spin_lock_irqsave(&tdev->lock, flags); + if (tdev->rx_mmio) { + memcpy_fromio(tdev->rx_buffer, tdev->rx_mmio, MBOX_MAX_MSG_LEN); + print_hex_dump_bytes("Client: Received [MMIO]: ", DUMP_PREFIX_ADDRESS, + tdev->rx_buffer, MBOX_MAX_MSG_LEN); + } else if (message) { + print_hex_dump_bytes("Client: Received [API]: ", DUMP_PREFIX_ADDRESS, + message, MBOX_MAX_MSG_LEN); + memcpy(tdev->rx_buffer, message, MBOX_MAX_MSG_LEN); + } + mbox_data_ready = true; + spin_unlock_irqrestore(&tdev->lock, flags); + + wake_up_interruptible(&tdev->waitq); + + kill_fasync(&tdev->async_queue, SIGIO, POLL_IN); +} + +static void mbox_test_prepare_message(struct mbox_client *client, void *message) +{ + struct mbox_test_device *tdev = dev_get_drvdata(client->dev); + + if (tdev->tx_mmio) { + if (tdev->signal) + memcpy_toio(tdev->tx_mmio, tdev->message, MBOX_MAX_MSG_LEN); + else + memcpy_toio(tdev->tx_mmio, message, MBOX_MAX_MSG_LEN); + } +} + +static void mbox_test_message_sent(struct mbox_client *client, + void *message, int r) +{ + if (r) + dev_warn(client->dev, + "Client: Message could not be sent: %d\n", r); + else + dev_info(client->dev, + "Client: Message sent\n"); +} + +static struct mbox_chan * +mbox_test_request_channel(struct platform_device *pdev, const char *name) +{ + struct mbox_client *client; + struct mbox_chan *channel; + + client = devm_kzalloc(&pdev->dev, sizeof(*client), GFP_KERNEL); + if (!client) + return ERR_PTR(-ENOMEM); + + client->dev = &pdev->dev; + client->rx_callback = mbox_test_receive_message; + client->tx_prepare = mbox_test_prepare_message; + client->tx_done = mbox_test_message_sent; + client->tx_block = true; + client->knows_txdone = false; + client->tx_tout = 500; + + channel = mbox_request_channel_byname(client, name); + if (IS_ERR(channel)) { + dev_warn(&pdev->dev, "Failed to request %s channel\n", name); + return NULL; + } + + return channel; +} + +static int mbox_test_probe(struct platform_device *pdev) +{ + struct mbox_test_device *tdev; + struct resource *res; + resource_size_t size; + int ret; + + tdev = devm_kzalloc(&pdev->dev, sizeof(*tdev), GFP_KERNEL); + if (!tdev) + return -ENOMEM; + + /* It's okay for MMIO to be NULL */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + tdev->tx_mmio = devm_ioremap_resource(&pdev->dev, res); + if (PTR_ERR(tdev->tx_mmio) == -EBUSY) { + /* if reserved area in SRAM, try just ioremap */ + size = resource_size(res); + tdev->tx_mmio = devm_ioremap(&pdev->dev, res->start, size); + } else if (IS_ERR(tdev->tx_mmio)) { + tdev->tx_mmio = NULL; + } + + /* If specified, second reg entry is Rx MMIO */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + tdev->rx_mmio = devm_ioremap_resource(&pdev->dev, res); + if (PTR_ERR(tdev->rx_mmio) == -EBUSY) { + size = resource_size(res); + tdev->rx_mmio = devm_ioremap(&pdev->dev, res->start, size); + } else if (IS_ERR(tdev->rx_mmio)) { + tdev->rx_mmio = tdev->tx_mmio; + } + + tdev->tx_channel = mbox_test_request_channel(pdev, "tx"); + tdev->rx_channel = mbox_test_request_channel(pdev, "rx"); + + if (!tdev->tx_channel && !tdev->rx_channel) + return -EPROBE_DEFER; + + /* If Rx is not specified but has Rx MMIO, then Rx = Tx */ + if (!tdev->rx_channel && (tdev->rx_mmio != tdev->tx_mmio)) + tdev->rx_channel = tdev->tx_channel; + + tdev->dev = &pdev->dev; + platform_set_drvdata(pdev, tdev); + + spin_lock_init(&tdev->lock); + + if (tdev->rx_channel) { + tdev->rx_buffer = devm_kzalloc(&pdev->dev, + MBOX_MAX_MSG_LEN, GFP_KERNEL); + if (!tdev->rx_buffer) + return -ENOMEM; + } + + ret = mbox_test_add_debugfs(pdev, tdev); + if (ret) + return ret; + + init_waitqueue_head(&tdev->waitq); + dev_info(&pdev->dev, "Successfully registered\n"); + + return 0; +} + +static int mbox_test_remove(struct platform_device *pdev) +{ + struct mbox_test_device *tdev = platform_get_drvdata(pdev); + + debugfs_remove_recursive(tdev->root_debugfs_dir); + + if (tdev->tx_channel) + mbox_free_channel(tdev->tx_channel); + if (tdev->rx_channel) + mbox_free_channel(tdev->rx_channel); + + return 0; +} + +static const struct of_device_id mbox_test_match[] = { + { .compatible = "mailbox-test" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mbox_test_match); + +static struct platform_driver mbox_test_driver = { + .driver = { + .name = "mailbox_test", + .of_match_table = mbox_test_match, + }, + .probe = mbox_test_probe, + .remove = mbox_test_remove, +}; +module_platform_driver(mbox_test_driver); + +MODULE_DESCRIPTION("Generic Mailbox Testing Facility"); +MODULE_AUTHOR("Lee Jones