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/net/wan/c101.c | 440 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 440 insertions(+) create mode 100644 drivers/net/wan/c101.c (limited to 'drivers/net/wan/c101.c') diff --git a/drivers/net/wan/c101.c b/drivers/net/wan/c101.c new file mode 100644 index 000000000..8dd14d916 --- /dev/null +++ b/drivers/net/wan/c101.c @@ -0,0 +1,440 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Moxa C101 synchronous serial card driver for Linux + * + * Copyright (C) 2000-2003 Krzysztof Halasa + * + * For information see + * + * Sources of information: + * Hitachi HD64570 SCA User's Manual + * Moxa C101 User's Manual + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "hd64570.h" + +static const char *version = "Moxa C101 driver version: 1.15"; +static const char *devname = "C101"; + +#undef DEBUG_PKT +#define DEBUG_RINGS + +#define C101_PAGE 0x1D00 +#define C101_DTR 0x1E00 +#define C101_SCA 0x1F00 +#define C101_WINDOW_SIZE 0x2000 +#define C101_MAPPED_RAM_SIZE 0x4000 + +#define RAM_SIZE (256 * 1024) +#define TX_RING_BUFFERS 10 +#define RX_RING_BUFFERS ((RAM_SIZE - C101_WINDOW_SIZE) / \ + (sizeof(pkt_desc) + HDLC_MAX_MRU) - TX_RING_BUFFERS) + +#define CLOCK_BASE 9830400 /* 9.8304 MHz */ +#define PAGE0_ALWAYS_MAPPED + +static char *hw; /* pointer to hw=xxx command line string */ + +typedef struct card_s { + struct net_device *dev; + spinlock_t lock; /* TX lock */ + u8 __iomem *win0base; /* ISA window base address */ + u32 phy_winbase; /* ISA physical base address */ + sync_serial_settings settings; + int rxpart; /* partial frame received, next frame invalid*/ + unsigned short encoding; + unsigned short parity; + u16 rx_ring_buffers; /* number of buffers in a ring */ + u16 tx_ring_buffers; + u16 buff_offset; /* offset of first buffer of first channel */ + u16 rxin; /* rx ring buffer 'in' pointer */ + u16 txin; /* tx ring buffer 'in' and 'last' pointers */ + u16 txlast; + u8 rxs, txs, tmc; /* SCA registers */ + u8 irq; /* IRQ (3-15) */ + u8 page; + + struct card_s *next_card; +} card_t; + +typedef card_t port_t; + +static card_t *first_card; +static card_t **new_card = &first_card; + +#define sca_in(reg, card) readb((card)->win0base + C101_SCA + (reg)) +#define sca_out(value, reg, card) writeb(value, (card)->win0base + C101_SCA + (reg)) +#define sca_inw(reg, card) readw((card)->win0base + C101_SCA + (reg)) + +/* EDA address register must be set in EDAL, EDAH order - 8 bit ISA bus */ +#define sca_outw(value, reg, card) do { \ + writeb(value & 0xFF, (card)->win0base + C101_SCA + (reg)); \ + writeb((value >> 8) & 0xFF, (card)->win0base + C101_SCA + (reg + 1));\ +} while (0) + +#define port_to_card(port) (port) +#define log_node(port) (0) +#define phy_node(port) (0) +#define winsize(card) (C101_WINDOW_SIZE) +#define win0base(card) ((card)->win0base) +#define winbase(card) ((card)->win0base + 0x2000) +#define get_port(card, port) (card) +static void sca_msci_intr(port_t *port); + +static inline u8 sca_get_page(card_t *card) +{ + return card->page; +} + +static inline void openwin(card_t *card, u8 page) +{ + card->page = page; + writeb(page, card->win0base + C101_PAGE); +} + +#include "hd64570.c" + +static inline void set_carrier(port_t *port) +{ + if (!(sca_in(MSCI1_OFFSET + ST3, port) & ST3_DCD)) + netif_carrier_on(port_to_dev(port)); + else + netif_carrier_off(port_to_dev(port)); +} + +static void sca_msci_intr(port_t *port) +{ + u8 stat = sca_in(MSCI0_OFFSET + ST1, port); /* read MSCI ST1 status */ + + /* Reset MSCI TX underrun and CDCD (ignored) status bit */ + sca_out(stat & (ST1_UDRN | ST1_CDCD), MSCI0_OFFSET + ST1, port); + + if (stat & ST1_UDRN) { + /* TX Underrun error detected */ + port_to_dev(port)->stats.tx_errors++; + port_to_dev(port)->stats.tx_fifo_errors++; + } + + stat = sca_in(MSCI1_OFFSET + ST1, port); /* read MSCI1 ST1 status */ + /* Reset MSCI CDCD status bit - uses ch#2 DCD input */ + sca_out(stat & ST1_CDCD, MSCI1_OFFSET + ST1, port); + + if (stat & ST1_CDCD) + set_carrier(port); +} + +static void c101_set_iface(port_t *port) +{ + u8 rxs = port->rxs & CLK_BRG_MASK; + u8 txs = port->txs & CLK_BRG_MASK; + + switch (port->settings.clock_type) { + case CLOCK_INT: + rxs |= CLK_BRG_RX; /* TX clock */ + txs |= CLK_RXCLK_TX; /* BRG output */ + break; + + case CLOCK_TXINT: + rxs |= CLK_LINE_RX; /* RXC input */ + txs |= CLK_BRG_TX; /* BRG output */ + break; + + case CLOCK_TXFROMRX: + rxs |= CLK_LINE_RX; /* RXC input */ + txs |= CLK_RXCLK_TX; /* RX clock */ + break; + + default: /* EXTernal clock */ + rxs |= CLK_LINE_RX; /* RXC input */ + txs |= CLK_LINE_TX; /* TXC input */ + } + + port->rxs = rxs; + port->txs = txs; + sca_out(rxs, MSCI1_OFFSET + RXS, port); + sca_out(txs, MSCI1_OFFSET + TXS, port); + sca_set_port(port); +} + +static int c101_open(struct net_device *dev) +{ + port_t *port = dev_to_port(dev); + int result; + + result = hdlc_open(dev); + if (result) + return result; + + writeb(1, port->win0base + C101_DTR); + sca_out(0, MSCI1_OFFSET + CTL, port); /* RTS uses ch#2 output */ + sca_open(dev); + /* DCD is connected to port 2 !@#$%^& - disable MSCI0 CDCD interrupt */ + sca_out(IE1_UDRN, MSCI0_OFFSET + IE1, port); + sca_out(IE0_TXINT, MSCI0_OFFSET + IE0, port); + + set_carrier(port); + + /* enable MSCI1 CDCD interrupt */ + sca_out(IE1_CDCD, MSCI1_OFFSET + IE1, port); + sca_out(IE0_RXINTA, MSCI1_OFFSET + IE0, port); + sca_out(0x48, IER0, port); /* TXINT #0 and RXINT #1 */ + c101_set_iface(port); + return 0; +} + +static int c101_close(struct net_device *dev) +{ + port_t *port = dev_to_port(dev); + + sca_close(dev); + writeb(0, port->win0base + C101_DTR); + sca_out(CTL_NORTS, MSCI1_OFFSET + CTL, port); + hdlc_close(dev); + return 0; +} + +static int c101_siocdevprivate(struct net_device *dev, struct ifreq *ifr, + void __user *data, int cmd) +{ +#ifdef DEBUG_RINGS + port_t *port = dev_to_port(dev); + + if (cmd == SIOCDEVPRIVATE) { + sca_dump_rings(dev); + printk(KERN_DEBUG "MSCI1: ST: %02x %02x %02x %02x\n", + sca_in(MSCI1_OFFSET + ST0, port), + sca_in(MSCI1_OFFSET + ST1, port), + sca_in(MSCI1_OFFSET + ST2, port), + sca_in(MSCI1_OFFSET + ST3, port)); + return 0; + } +#endif + + return -EOPNOTSUPP; +} + +static int c101_ioctl(struct net_device *dev, struct if_settings *ifs) +{ + const size_t size = sizeof(sync_serial_settings); + sync_serial_settings new_line; + sync_serial_settings __user *line = ifs->ifs_ifsu.sync; + port_t *port = dev_to_port(dev); + + switch (ifs->type) { + case IF_GET_IFACE: + ifs->type = IF_IFACE_SYNC_SERIAL; + if (ifs->size < size) { + ifs->size = size; /* data size wanted */ + return -ENOBUFS; + } + if (copy_to_user(line, &port->settings, size)) + return -EFAULT; + return 0; + + case IF_IFACE_SYNC_SERIAL: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + if (copy_from_user(&new_line, line, size)) + return -EFAULT; + + if (new_line.clock_type != CLOCK_EXT && + new_line.clock_type != CLOCK_TXFROMRX && + new_line.clock_type != CLOCK_INT && + new_line.clock_type != CLOCK_TXINT) + return -EINVAL; /* No such clock setting */ + + if (new_line.loopback != 0 && new_line.loopback != 1) + return -EINVAL; + + memcpy(&port->settings, &new_line, size); /* Update settings */ + c101_set_iface(port); + return 0; + + default: + return hdlc_ioctl(dev, ifs); + } +} + +static void c101_destroy_card(card_t *card) +{ + readb(card->win0base + C101_PAGE); /* Resets SCA? */ + + if (card->irq) + free_irq(card->irq, card); + + if (card->win0base) { + iounmap(card->win0base); + release_mem_region(card->phy_winbase, C101_MAPPED_RAM_SIZE); + } + + free_netdev(card->dev); + + kfree(card); +} + +static const struct net_device_ops c101_ops = { + .ndo_open = c101_open, + .ndo_stop = c101_close, + .ndo_start_xmit = hdlc_start_xmit, + .ndo_siocwandev = c101_ioctl, + .ndo_siocdevprivate = c101_siocdevprivate, +}; + +static int __init c101_run(unsigned long irq, unsigned long winbase) +{ + struct net_device *dev; + hdlc_device *hdlc; + card_t *card; + int result; + + if (irq < 3 || irq > 15 || irq == 6) /* FIXME */ { + pr_err("invalid IRQ value\n"); + return -ENODEV; + } + + if (winbase < 0xC0000 || winbase > 0xDFFFF || (winbase & 0x3FFF) != 0) { + pr_err("invalid RAM value\n"); + return -ENODEV; + } + + card = kzalloc(sizeof(card_t), GFP_KERNEL); + if (!card) + return -ENOBUFS; + + card->dev = alloc_hdlcdev(card); + if (!card->dev) { + pr_err("unable to allocate memory\n"); + kfree(card); + return -ENOBUFS; + } + + if (request_irq(irq, sca_intr, 0, devname, card)) { + pr_err("could not allocate IRQ\n"); + c101_destroy_card(card); + return -EBUSY; + } + card->irq = irq; + + if (!request_mem_region(winbase, C101_MAPPED_RAM_SIZE, devname)) { + pr_err("could not request RAM window\n"); + c101_destroy_card(card); + return -EBUSY; + } + card->phy_winbase = winbase; + card->win0base = ioremap(winbase, C101_MAPPED_RAM_SIZE); + if (!card->win0base) { + pr_err("could not map I/O address\n"); + c101_destroy_card(card); + return -EFAULT; + } + + card->tx_ring_buffers = TX_RING_BUFFERS; + card->rx_ring_buffers = RX_RING_BUFFERS; + card->buff_offset = C101_WINDOW_SIZE; /* Bytes 1D00-1FFF reserved */ + + readb(card->win0base + C101_PAGE); /* Resets SCA? */ + udelay(100); + writeb(0, card->win0base + C101_PAGE); + writeb(0, card->win0base + C101_DTR); /* Power-up for RAM? */ + + sca_init(card, 0); + + dev = port_to_dev(card); + hdlc = dev_to_hdlc(dev); + + spin_lock_init(&card->lock); + dev->irq = irq; + dev->mem_start = winbase; + dev->mem_end = winbase + C101_MAPPED_RAM_SIZE - 1; + dev->tx_queue_len = 50; + dev->netdev_ops = &c101_ops; + hdlc->attach = sca_attach; + hdlc->xmit = sca_xmit; + card->settings.clock_type = CLOCK_EXT; + + result = register_hdlc_device(dev); + if (result) { + pr_warn("unable to register hdlc device\n"); + c101_destroy_card(card); + return result; + } + + sca_init_port(card); /* Set up C101 memory */ + set_carrier(card); + + netdev_info(dev, "Moxa C101 on IRQ%u, using %u TX + %u RX packets rings\n", + card->irq, card->tx_ring_buffers, card->rx_ring_buffers); + + *new_card = card; + new_card = &card->next_card; + return 0; +} + +static int __init c101_init(void) +{ + if (!hw) { +#ifdef MODULE + pr_info("no card initialized\n"); +#endif + return -EINVAL; /* no parameters specified, abort */ + } + + pr_info("%s\n", version); + + do { + unsigned long irq, ram; + + irq = simple_strtoul(hw, &hw, 0); + + if (*hw++ != ',') + break; + ram = simple_strtoul(hw, &hw, 0); + + if (*hw == ':' || *hw == '\x0') + c101_run(irq, ram); + + if (*hw == '\x0') + return first_card ? 0 : -EINVAL; + } while (*hw++ == ':'); + + pr_err("invalid hardware parameters\n"); + return first_card ? 0 : -EINVAL; +} + +static void __exit c101_cleanup(void) +{ + card_t *card = first_card; + + while (card) { + card_t *ptr = card; + + card = card->next_card; + unregister_hdlc_device(port_to_dev(ptr)); + c101_destroy_card(ptr); + } +} + +module_init(c101_init); +module_exit(c101_cleanup); + +MODULE_AUTHOR("Krzysztof Halasa "); +MODULE_DESCRIPTION("Moxa C101 serial port driver"); +MODULE_LICENSE("GPL v2"); +module_param(hw, charp, 0444); +MODULE_PARM_DESC(hw, "irq,ram:irq,..."); -- cgit v1.2.3