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/parport/parport_gsc.c | 426 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 426 insertions(+) create mode 100644 drivers/parport/parport_gsc.c (limited to 'drivers/parport/parport_gsc.c') diff --git a/drivers/parport/parport_gsc.c b/drivers/parport/parport_gsc.c new file mode 100644 index 000000000..0dcc497b0 --- /dev/null +++ b/drivers/parport/parport_gsc.c @@ -0,0 +1,426 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Low-level parallel-support for PC-style hardware integrated in the + * LASI-Controller (on GSC-Bus) for HP-PARISC Workstations + * + * (C) 1999-2001 by Helge Deller + * + * based on parport_pc.c by + * Grant Guenther + * Phil Blundell + * Tim Waugh + * Jose Renau + * David Campbell + * Andrea Arcangeli + */ + +#undef DEBUG /* undef for production */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include +#include +#include +#include +#include "parport_gsc.h" + + +MODULE_AUTHOR("Helge Deller "); +MODULE_DESCRIPTION("HP-PARISC PC-style parallel port driver"); +MODULE_LICENSE("GPL"); + + +/* + * Clear TIMEOUT BIT in EPP MODE + * + * This is also used in SPP detection. + */ +static int clear_epp_timeout(struct parport *pb) +{ + unsigned char r; + + if (!(parport_gsc_read_status(pb) & 0x01)) + return 1; + + /* To clear timeout some chips require double read */ + parport_gsc_read_status(pb); + r = parport_gsc_read_status(pb); + parport_writeb (r | 0x01, STATUS (pb)); /* Some reset by writing 1 */ + parport_writeb (r & 0xfe, STATUS (pb)); /* Others by writing 0 */ + r = parport_gsc_read_status(pb); + + return !(r & 0x01); +} + +/* + * Access functions. + * + * Most of these aren't static because they may be used by the + * parport_xxx_yyy macros. extern __inline__ versions of several + * of these are in parport_gsc.h. + */ + +void parport_gsc_init_state(struct pardevice *dev, struct parport_state *s) +{ + s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0); +} + +void parport_gsc_save_state(struct parport *p, struct parport_state *s) +{ + s->u.pc.ctr = parport_readb (CONTROL (p)); +} + +void parport_gsc_restore_state(struct parport *p, struct parport_state *s) +{ + parport_writeb (s->u.pc.ctr, CONTROL (p)); +} + +struct parport_operations parport_gsc_ops = +{ + .write_data = parport_gsc_write_data, + .read_data = parport_gsc_read_data, + + .write_control = parport_gsc_write_control, + .read_control = parport_gsc_read_control, + .frob_control = parport_gsc_frob_control, + + .read_status = parport_gsc_read_status, + + .enable_irq = parport_gsc_enable_irq, + .disable_irq = parport_gsc_disable_irq, + + .data_forward = parport_gsc_data_forward, + .data_reverse = parport_gsc_data_reverse, + + .init_state = parport_gsc_init_state, + .save_state = parport_gsc_save_state, + .restore_state = parport_gsc_restore_state, + + .epp_write_data = parport_ieee1284_epp_write_data, + .epp_read_data = parport_ieee1284_epp_read_data, + .epp_write_addr = parport_ieee1284_epp_write_addr, + .epp_read_addr = parport_ieee1284_epp_read_addr, + + .ecp_write_data = parport_ieee1284_ecp_write_data, + .ecp_read_data = parport_ieee1284_ecp_read_data, + .ecp_write_addr = parport_ieee1284_ecp_write_addr, + + .compat_write_data = parport_ieee1284_write_compat, + .nibble_read_data = parport_ieee1284_read_nibble, + .byte_read_data = parport_ieee1284_read_byte, + + .owner = THIS_MODULE, +}; + +/* --- Mode detection ------------------------------------- */ + +/* + * Checks for port existence, all ports support SPP MODE + */ +static int parport_SPP_supported(struct parport *pb) +{ + unsigned char r, w; + + /* + * first clear an eventually pending EPP timeout + * I (sailer@ife.ee.ethz.ch) have an SMSC chipset + * that does not even respond to SPP cycles if an EPP + * timeout is pending + */ + clear_epp_timeout(pb); + + /* Do a simple read-write test to make sure the port exists. */ + w = 0xc; + parport_writeb (w, CONTROL (pb)); + + /* Is there a control register that we can read from? Some + * ports don't allow reads, so read_control just returns a + * software copy. Some ports _do_ allow reads, so bypass the + * software copy here. In addition, some bits aren't + * writable. */ + r = parport_readb (CONTROL (pb)); + if ((r & 0xf) == w) { + w = 0xe; + parport_writeb (w, CONTROL (pb)); + r = parport_readb (CONTROL (pb)); + parport_writeb (0xc, CONTROL (pb)); + if ((r & 0xf) == w) + return PARPORT_MODE_PCSPP; + } + + /* Try the data register. The data lines aren't tri-stated at + * this stage, so we expect back what we wrote. */ + w = 0xaa; + parport_gsc_write_data (pb, w); + r = parport_gsc_read_data (pb); + if (r == w) { + w = 0x55; + parport_gsc_write_data (pb, w); + r = parport_gsc_read_data (pb); + if (r == w) + return PARPORT_MODE_PCSPP; + } + + return 0; +} + +/* Detect PS/2 support. + * + * Bit 5 (0x20) sets the PS/2 data direction; setting this high + * allows us to read data from the data lines. In theory we would get back + * 0xff but any peripheral attached to the port may drag some or all of the + * lines down to zero. So if we get back anything that isn't the contents + * of the data register we deem PS/2 support to be present. + * + * Some SPP ports have "half PS/2" ability - you can't turn off the line + * drivers, but an external peripheral with sufficiently beefy drivers of + * its own can overpower them and assert its own levels onto the bus, from + * where they can then be read back as normal. Ports with this property + * and the right type of device attached are likely to fail the SPP test, + * (as they will appear to have stuck bits) and so the fact that they might + * be misdetected here is rather academic. + */ + +static int parport_PS2_supported(struct parport *pb) +{ + int ok = 0; + + clear_epp_timeout(pb); + + /* try to tri-state the buffer */ + parport_gsc_data_reverse (pb); + + parport_gsc_write_data(pb, 0x55); + if (parport_gsc_read_data(pb) != 0x55) ok++; + + parport_gsc_write_data(pb, 0xaa); + if (parport_gsc_read_data(pb) != 0xaa) ok++; + + /* cancel input mode */ + parport_gsc_data_forward (pb); + + if (ok) { + pb->modes |= PARPORT_MODE_TRISTATE; + } else { + struct parport_gsc_private *priv = pb->private_data; + priv->ctr_writable &= ~0x20; + } + + return ok; +} + + +/* --- Initialisation code -------------------------------- */ + +struct parport *parport_gsc_probe_port(unsigned long base, + unsigned long base_hi, int irq, + int dma, struct parisc_device *padev) +{ + struct parport_gsc_private *priv; + struct parport_operations *ops; + struct parport tmp; + struct parport *p = &tmp; + + priv = kzalloc (sizeof (struct parport_gsc_private), GFP_KERNEL); + if (!priv) { + printk(KERN_DEBUG "parport (0x%lx): no memory!\n", base); + return NULL; + } + ops = kmemdup(&parport_gsc_ops, sizeof(struct parport_operations), + GFP_KERNEL); + if (!ops) { + printk(KERN_DEBUG "parport (0x%lx): no memory for ops!\n", + base); + kfree (priv); + return NULL; + } + priv->ctr = 0xc; + priv->ctr_writable = 0xff; + priv->dma_buf = NULL; + priv->dma_handle = 0; + p->base = base; + p->base_hi = base_hi; + p->irq = irq; + p->dma = dma; + p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT; + p->ops = ops; + p->private_data = priv; + p->physport = p; + if (!parport_SPP_supported (p)) { + /* No port. */ + kfree (priv); + kfree(ops); + return NULL; + } + parport_PS2_supported (p); + + if (!(p = parport_register_port(base, PARPORT_IRQ_NONE, + PARPORT_DMA_NONE, ops))) { + kfree (priv); + kfree (ops); + return NULL; + } + + p->dev = &padev->dev; + p->base_hi = base_hi; + p->modes = tmp.modes; + p->size = (p->modes & PARPORT_MODE_EPP)?8:3; + p->private_data = priv; + + pr_info("%s: PC-style at 0x%lx", p->name, p->base); + p->irq = irq; + if (p->irq == PARPORT_IRQ_AUTO) { + p->irq = PARPORT_IRQ_NONE; + } + if (p->irq != PARPORT_IRQ_NONE) { + pr_cont(", irq %d", p->irq); + + if (p->dma == PARPORT_DMA_AUTO) { + p->dma = PARPORT_DMA_NONE; + } + } + if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq + is mandatory (see above) */ + p->dma = PARPORT_DMA_NONE; + + pr_cont(" ["); +#define printmode(x) \ +do { \ + if (p->modes & PARPORT_MODE_##x) \ + pr_cont("%s%s", f++ ? "," : "", #x); \ +} while (0) + { + int f = 0; + printmode(PCSPP); + printmode(TRISTATE); + printmode(COMPAT); + printmode(EPP); +// printmode(ECP); +// printmode(DMA); + } +#undef printmode + pr_cont("]\n"); + + if (p->irq != PARPORT_IRQ_NONE) { + if (request_irq (p->irq, parport_irq_handler, + 0, p->name, p)) { + pr_warn("%s: irq %d in use, resorting to polled operation\n", + p->name, p->irq); + p->irq = PARPORT_IRQ_NONE; + p->dma = PARPORT_DMA_NONE; + } + } + + /* Done probing. Now put the port into a sensible start-up state. */ + + parport_gsc_write_data(p, 0); + parport_gsc_data_forward (p); + + /* Now that we've told the sharing engine about the port, and + found out its characteristics, let the high-level drivers + know about it. */ + parport_announce_port (p); + + return p; +} + + +#define PARPORT_GSC_OFFSET 0x800 + +static int parport_count; + +static int __init parport_init_chip(struct parisc_device *dev) +{ + struct parport *p; + unsigned long port; + + if (!dev->irq) { + pr_warn("IRQ not found for parallel device at 0x%llx\n", + (unsigned long long)dev->hpa.start); + return -ENODEV; + } + + port = dev->hpa.start + PARPORT_GSC_OFFSET; + + /* some older machines with ASP-chip don't support + * the enhanced parport modes. + */ + if (boot_cpu_data.cpu_type > pcxt && !pdc_add_valid(port+4)) { + + /* Initialize bidirectional-mode (0x10) & data-tranfer-mode #1 (0x20) */ + pr_info("%s: initialize bidirectional-mode\n", __func__); + parport_writeb ( (0x10 + 0x20), port + 4); + + } else { + pr_info("%s: enhanced parport-modes not supported\n", __func__); + } + + p = parport_gsc_probe_port(port, 0, dev->irq, + /* PARPORT_IRQ_NONE */ PARPORT_DMA_NONE, dev); + if (p) + parport_count++; + dev_set_drvdata(&dev->dev, p); + + return 0; +} + +static void __exit parport_remove_chip(struct parisc_device *dev) +{ + struct parport *p = dev_get_drvdata(&dev->dev); + if (p) { + struct parport_gsc_private *priv = p->private_data; + struct parport_operations *ops = p->ops; + parport_remove_port(p); + if (p->dma != PARPORT_DMA_NONE) + free_dma(p->dma); + if (p->irq != PARPORT_IRQ_NONE) + free_irq(p->irq, p); + if (priv->dma_buf) + dma_free_coherent(&priv->dev->dev, PAGE_SIZE, + priv->dma_buf, priv->dma_handle); + kfree (p->private_data); + parport_put_port(p); + kfree (ops); /* hope no-one cached it */ + } +} + +static const struct parisc_device_id parport_tbl[] __initconst = { + { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x74 }, + { 0, } +}; + +MODULE_DEVICE_TABLE(parisc, parport_tbl); + +static struct parisc_driver parport_driver __refdata = { + .name = "Parallel", + .id_table = parport_tbl, + .probe = parport_init_chip, + .remove = __exit_p(parport_remove_chip), +}; + +int parport_gsc_init(void) +{ + return register_parisc_driver(&parport_driver); +} + +static void parport_gsc_exit(void) +{ + unregister_parisc_driver(&parport_driver); +} + +module_init(parport_gsc_init); +module_exit(parport_gsc_exit); -- cgit v1.2.3