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(). ... --- arch/mips/sgi-ip27/ip27-hubio.c | 185 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 185 insertions(+) create mode 100644 arch/mips/sgi-ip27/ip27-hubio.c (limited to 'arch/mips/sgi-ip27/ip27-hubio.c') diff --git a/arch/mips/sgi-ip27/ip27-hubio.c b/arch/mips/sgi-ip27/ip27-hubio.c new file mode 100644 index 000000000..8352eb640 --- /dev/null +++ b/arch/mips/sgi-ip27/ip27-hubio.c @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 1992-1997, 2000-2003 Silicon Graphics, Inc. + * Copyright (C) 2004 Christoph Hellwig. + * + * Support functions for the HUB ASIC - mostly PIO mapping related. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + + +static int force_fire_and_forget = 1; + +/** + * hub_pio_map - establish a HUB PIO mapping + * + * @hub: hub to perform PIO mapping on + * @widget: widget ID to perform PIO mapping for + * @xtalk_addr: xtalk_address that needs to be mapped + * @size: size of the PIO mapping + * + **/ +unsigned long hub_pio_map(nasid_t nasid, xwidgetnum_t widget, + unsigned long xtalk_addr, size_t size) +{ + unsigned i; + + /* use small-window mapping if possible */ + if ((xtalk_addr % SWIN_SIZE) + size <= SWIN_SIZE) + return NODE_SWIN_BASE(nasid, widget) + (xtalk_addr % SWIN_SIZE); + + if ((xtalk_addr % BWIN_SIZE) + size > BWIN_SIZE) { + printk(KERN_WARNING "PIO mapping at hub %d widget %d addr 0x%lx" + " too big (%ld)\n", + nasid, widget, xtalk_addr, size); + return 0; + } + + xtalk_addr &= ~(BWIN_SIZE-1); + for (i = 0; i < HUB_NUM_BIG_WINDOW; i++) { + if (test_and_set_bit(i, hub_data(nasid)->h_bigwin_used)) + continue; + + /* + * The code below does a PIO write to setup an ITTE entry. + * + * We need to prevent other CPUs from seeing our updated + * memory shadow of the ITTE (in the piomap) until the ITTE + * entry is actually set up; otherwise, another CPU might + * attempt a PIO prematurely. + * + * Also, the only way we can know that an entry has been + * received by the hub and can be used by future PIO reads/ + * writes is by reading back the ITTE entry after writing it. + * + * For these two reasons, we PIO read back the ITTE entry + * after we write it. + */ + IIO_ITTE_PUT(nasid, i, HUB_PIO_MAP_TO_MEM, widget, xtalk_addr); + __raw_readq(IIO_ITTE_GET(nasid, i)); + + return NODE_BWIN_BASE(nasid, widget) + (xtalk_addr % BWIN_SIZE); + } + + printk(KERN_WARNING "unable to establish PIO mapping for at" + " hub %d widget %d addr 0x%lx\n", + nasid, widget, xtalk_addr); + return 0; +} + + +/* + * hub_setup_prb(nasid, prbnum, credits, conveyor) + * + * Put a PRB into fire-and-forget mode if conveyor isn't set. Otherwise, + * put it into conveyor belt mode with the specified number of credits. + */ +static void hub_setup_prb(nasid_t nasid, int prbnum, int credits) +{ + union iprb_u prb; + int prb_offset; + + /* + * Get the current register value. + */ + prb_offset = IIO_IOPRB(prbnum); + prb.iprb_regval = REMOTE_HUB_L(nasid, prb_offset); + + /* + * Clear out some fields. + */ + prb.iprb_ovflow = 1; + prb.iprb_bnakctr = 0; + prb.iprb_anakctr = 0; + + /* + * Enable or disable fire-and-forget mode. + */ + prb.iprb_ff = force_fire_and_forget ? 1 : 0; + + /* + * Set the appropriate number of PIO credits for the widget. + */ + prb.iprb_xtalkctr = credits; + + /* + * Store the new value to the register. + */ + REMOTE_HUB_S(nasid, prb_offset, prb.iprb_regval); +} + +/** + * hub_set_piomode - set pio mode for a given hub + * + * @nasid: physical node ID for the hub in question + * + * Put the hub into either "PIO conveyor belt" mode or "fire-and-forget" mode. + * To do this, we have to make absolutely sure that no PIOs are in progress + * so we turn off access to all widgets for the duration of the function. + * + * XXX - This code should really check what kind of widget we're talking + * to. Bridges can only handle three requests, but XG will do more. + * How many can crossbow handle to widget 0? We're assuming 1. + * + * XXX - There is a bug in the crossbow that link reset PIOs do not + * return write responses. The easiest solution to this problem is to + * leave widget 0 (xbow) in fire-and-forget mode at all times. This + * only affects pio's to xbow registers, which should be rare. + **/ +static void hub_set_piomode(nasid_t nasid) +{ + u64 ii_iowa; + union hubii_wcr_u ii_wcr; + unsigned i; + + ii_iowa = REMOTE_HUB_L(nasid, IIO_OUTWIDGET_ACCESS); + REMOTE_HUB_S(nasid, IIO_OUTWIDGET_ACCESS, 0); + + ii_wcr.wcr_reg_value = REMOTE_HUB_L(nasid, IIO_WCR); + + if (ii_wcr.iwcr_dir_con) { + /* + * Assume a bridge here. + */ + hub_setup_prb(nasid, 0, 3); + } else { + /* + * Assume a crossbow here. + */ + hub_setup_prb(nasid, 0, 1); + } + + /* + * XXX - Here's where we should take the widget type into + * when account assigning credits. + */ + for (i = HUB_WIDGET_ID_MIN; i <= HUB_WIDGET_ID_MAX; i++) + hub_setup_prb(nasid, i, 3); + + REMOTE_HUB_S(nasid, IIO_OUTWIDGET_ACCESS, ii_iowa); +} + +/* + * hub_pio_init - PIO-related hub initialization + * + * @hub: hubinfo structure for our hub + */ +void hub_pio_init(nasid_t nasid) +{ + unsigned i; + + /* initialize big window piomaps for this hub */ + bitmap_zero(hub_data(nasid)->h_bigwin_used, HUB_NUM_BIG_WINDOW); + for (i = 0; i < HUB_NUM_BIG_WINDOW; i++) + IIO_ITTE_DISABLE(nasid, i); + + hub_set_piomode(nasid); +} -- cgit v1.2.3