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/powerpc/kernel/pci_dn.c | 496 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 496 insertions(+) create mode 100644 arch/powerpc/kernel/pci_dn.c (limited to 'arch/powerpc/kernel/pci_dn.c') diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c new file mode 100644 index 000000000..38561d6a2 --- /dev/null +++ b/arch/powerpc/kernel/pci_dn.c @@ -0,0 +1,496 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * pci_dn.c + * + * Copyright (C) 2001 Todd Inglett, IBM Corporation + * + * PCI manipulation via device_nodes. + */ +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +/* + * The function is used to find the firmware data of one + * specific PCI device, which is attached to the indicated + * PCI bus. For VFs, their firmware data is linked to that + * one of PF's bridge. For other devices, their firmware + * data is linked to that of their bridge. + */ +static struct pci_dn *pci_bus_to_pdn(struct pci_bus *bus) +{ + struct pci_bus *pbus; + struct device_node *dn; + struct pci_dn *pdn; + + /* + * We probably have virtual bus which doesn't + * have associated bridge. + */ + pbus = bus; + while (pbus) { + if (pci_is_root_bus(pbus) || pbus->self) + break; + + pbus = pbus->parent; + } + + /* + * Except virtual bus, all PCI buses should + * have device nodes. + */ + dn = pci_bus_to_OF_node(pbus); + pdn = dn ? PCI_DN(dn) : NULL; + + return pdn; +} + +struct pci_dn *pci_get_pdn_by_devfn(struct pci_bus *bus, + int devfn) +{ + struct device_node *dn = NULL; + struct pci_dn *parent, *pdn; + struct pci_dev *pdev = NULL; + + /* Fast path: fetch from PCI device */ + list_for_each_entry(pdev, &bus->devices, bus_list) { + if (pdev->devfn == devfn) { + if (pdev->dev.archdata.pci_data) + return pdev->dev.archdata.pci_data; + + dn = pci_device_to_OF_node(pdev); + break; + } + } + + /* Fast path: fetch from device node */ + pdn = dn ? PCI_DN(dn) : NULL; + if (pdn) + return pdn; + + /* Slow path: fetch from firmware data hierarchy */ + parent = pci_bus_to_pdn(bus); + if (!parent) + return NULL; + + list_for_each_entry(pdn, &parent->child_list, list) { + if (pdn->busno == bus->number && + pdn->devfn == devfn) + return pdn; + } + + return NULL; +} + +struct pci_dn *pci_get_pdn(struct pci_dev *pdev) +{ + struct device_node *dn; + struct pci_dn *parent, *pdn; + + /* Search device directly */ + if (pdev->dev.archdata.pci_data) + return pdev->dev.archdata.pci_data; + + /* Check device node */ + dn = pci_device_to_OF_node(pdev); + pdn = dn ? PCI_DN(dn) : NULL; + if (pdn) + return pdn; + + /* + * VFs don't have device nodes. We hook their + * firmware data to PF's bridge. + */ + parent = pci_bus_to_pdn(pdev->bus); + if (!parent) + return NULL; + + list_for_each_entry(pdn, &parent->child_list, list) { + if (pdn->busno == pdev->bus->number && + pdn->devfn == pdev->devfn) + return pdn; + } + + return NULL; +} + +#ifdef CONFIG_EEH +static struct eeh_dev *eeh_dev_init(struct pci_dn *pdn) +{ + struct eeh_dev *edev; + + /* Allocate EEH device */ + edev = kzalloc(sizeof(*edev), GFP_KERNEL); + if (!edev) + return NULL; + + /* Associate EEH device with OF node */ + pdn->edev = edev; + edev->pdn = pdn; + edev->bdfn = (pdn->busno << 8) | pdn->devfn; + edev->controller = pdn->phb; + + return edev; +} +#endif /* CONFIG_EEH */ + +#ifdef CONFIG_PCI_IOV +static struct pci_dn *add_one_sriov_vf_pdn(struct pci_dn *parent, + int busno, int devfn) +{ + struct pci_dn *pdn; + + /* Except PHB, we always have the parent */ + if (!parent) + return NULL; + + pdn = kzalloc(sizeof(*pdn), GFP_KERNEL); + if (!pdn) + return NULL; + + pdn->phb = parent->phb; + pdn->parent = parent; + pdn->busno = busno; + pdn->devfn = devfn; + pdn->pe_number = IODA_INVALID_PE; + INIT_LIST_HEAD(&pdn->child_list); + INIT_LIST_HEAD(&pdn->list); + list_add_tail(&pdn->list, &parent->child_list); + + return pdn; +} + +struct pci_dn *add_sriov_vf_pdns(struct pci_dev *pdev) +{ + struct pci_dn *parent, *pdn; + int i; + + /* Only support IOV for now */ + if (WARN_ON(!pdev->is_physfn)) + return NULL; + + /* Check if VFs have been populated */ + pdn = pci_get_pdn(pdev); + if (!pdn || (pdn->flags & PCI_DN_FLAG_IOV_VF)) + return NULL; + + pdn->flags |= PCI_DN_FLAG_IOV_VF; + parent = pci_bus_to_pdn(pdev->bus); + if (!parent) + return NULL; + + for (i = 0; i < pci_sriov_get_totalvfs(pdev); i++) { + struct eeh_dev *edev __maybe_unused; + + pdn = add_one_sriov_vf_pdn(parent, + pci_iov_virtfn_bus(pdev, i), + pci_iov_virtfn_devfn(pdev, i)); + if (!pdn) { + dev_warn(&pdev->dev, "%s: Cannot create firmware data for VF#%d\n", + __func__, i); + return NULL; + } + +#ifdef CONFIG_EEH + /* Create the EEH device for the VF */ + edev = eeh_dev_init(pdn); + BUG_ON(!edev); + + /* FIXME: these should probably be populated by the EEH probe */ + edev->physfn = pdev; + edev->vf_index = i; +#endif /* CONFIG_EEH */ + } + return pci_get_pdn(pdev); +} + +void remove_sriov_vf_pdns(struct pci_dev *pdev) +{ + struct pci_dn *parent; + struct pci_dn *pdn, *tmp; + int i; + + /* Only support IOV PF for now */ + if (WARN_ON(!pdev->is_physfn)) + return; + + /* Check if VFs have been populated */ + pdn = pci_get_pdn(pdev); + if (!pdn || !(pdn->flags & PCI_DN_FLAG_IOV_VF)) + return; + + pdn->flags &= ~PCI_DN_FLAG_IOV_VF; + parent = pci_bus_to_pdn(pdev->bus); + if (!parent) + return; + + /* + * We might introduce flag to pci_dn in future + * so that we can release VF's firmware data in + * a batch mode. + */ + for (i = 0; i < pci_sriov_get_totalvfs(pdev); i++) { + struct eeh_dev *edev __maybe_unused; + + list_for_each_entry_safe(pdn, tmp, + &parent->child_list, list) { + if (pdn->busno != pci_iov_virtfn_bus(pdev, i) || + pdn->devfn != pci_iov_virtfn_devfn(pdev, i)) + continue; + +#ifdef CONFIG_EEH + /* + * Release EEH state for this VF. The PCI core + * has already torn down the pci_dev for this VF, but + * we're responsible to removing the eeh_dev since it + * has the same lifetime as the pci_dn that spawned it. + */ + edev = pdn_to_eeh_dev(pdn); + if (edev) { + /* + * We allocate pci_dn's for the totalvfs count, + * but only the vfs that were activated + * have a configured PE. + */ + if (edev->pe) + eeh_pe_tree_remove(edev); + + pdn->edev = NULL; + kfree(edev); + } +#endif /* CONFIG_EEH */ + + if (!list_empty(&pdn->list)) + list_del(&pdn->list); + + kfree(pdn); + } + } +} +#endif /* CONFIG_PCI_IOV */ + +struct pci_dn *pci_add_device_node_info(struct pci_controller *hose, + struct device_node *dn) +{ + const __be32 *type = of_get_property(dn, "ibm,pci-config-space-type", NULL); + const __be32 *regs; + struct device_node *parent; + struct pci_dn *pdn; +#ifdef CONFIG_EEH + struct eeh_dev *edev; +#endif + + pdn = kzalloc(sizeof(*pdn), GFP_KERNEL); + if (pdn == NULL) + return NULL; + dn->data = pdn; + pdn->phb = hose; + pdn->pe_number = IODA_INVALID_PE; + regs = of_get_property(dn, "reg", NULL); + if (regs) { + u32 addr = of_read_number(regs, 1); + + /* First register entry is addr (00BBSS00) */ + pdn->busno = (addr >> 16) & 0xff; + pdn->devfn = (addr >> 8) & 0xff; + } + + /* vendor/device IDs and class code */ + regs = of_get_property(dn, "vendor-id", NULL); + pdn->vendor_id = regs ? of_read_number(regs, 1) : 0; + regs = of_get_property(dn, "device-id", NULL); + pdn->device_id = regs ? of_read_number(regs, 1) : 0; + regs = of_get_property(dn, "class-code", NULL); + pdn->class_code = regs ? of_read_number(regs, 1) : 0; + + /* Extended config space */ + pdn->pci_ext_config_space = (type && of_read_number(type, 1) == 1); + + /* Create EEH device */ +#ifdef CONFIG_EEH + edev = eeh_dev_init(pdn); + if (!edev) { + kfree(pdn); + return NULL; + } +#endif + + /* Attach to parent node */ + INIT_LIST_HEAD(&pdn->child_list); + INIT_LIST_HEAD(&pdn->list); + parent = of_get_parent(dn); + pdn->parent = parent ? PCI_DN(parent) : NULL; + of_node_put(parent); + if (pdn->parent) + list_add_tail(&pdn->list, &pdn->parent->child_list); + + return pdn; +} +EXPORT_SYMBOL_GPL(pci_add_device_node_info); + +void pci_remove_device_node_info(struct device_node *dn) +{ + struct pci_dn *pdn = dn ? PCI_DN(dn) : NULL; + struct device_node *parent; + struct pci_dev *pdev; +#ifdef CONFIG_EEH + struct eeh_dev *edev = pdn_to_eeh_dev(pdn); + + if (edev) + edev->pdn = NULL; +#endif + + if (!pdn) + return; + + WARN_ON(!list_empty(&pdn->child_list)); + list_del(&pdn->list); + + /* Drop the parent pci_dn's ref to our backing dt node */ + parent = of_get_parent(dn); + if (parent) + of_node_put(parent); + + /* + * At this point we *might* still have a pci_dev that was + * instantiated from this pci_dn. So defer free()ing it until + * the pci_dev's release function is called. + */ + pdev = pci_get_domain_bus_and_slot(pdn->phb->global_number, + pdn->busno, pdn->devfn); + if (pdev) { + /* NB: pdev has a ref to dn */ + pci_dbg(pdev, "marked pdn (from %pOF) as dead\n", dn); + pdn->flags |= PCI_DN_FLAG_DEAD; + } else { + dn->data = NULL; + kfree(pdn); + } + + pci_dev_put(pdev); +} +EXPORT_SYMBOL_GPL(pci_remove_device_node_info); + +/* + * Traverse a device tree stopping each PCI device in the tree. + * This is done depth first. As each node is processed, a "pre" + * function is called and the children are processed recursively. + * + * The "pre" func returns a value. If non-zero is returned from + * the "pre" func, the traversal stops and this value is returned. + * This return value is useful when using traverse as a method of + * finding a device. + * + * NOTE: we do not run the func for devices that do not appear to + * be PCI except for the start node which we assume (this is good + * because the start node is often a phb which may be missing PCI + * properties). + * We use the class-code as an indicator. If we run into + * one of these nodes we also assume its siblings are non-pci for + * performance. + */ +void *pci_traverse_device_nodes(struct device_node *start, + void *(*fn)(struct device_node *, void *), + void *data) +{ + struct device_node *dn, *nextdn; + void *ret; + + /* We started with a phb, iterate all childs */ + for (dn = start->child; dn; dn = nextdn) { + const __be32 *classp; + u32 class = 0; + + nextdn = NULL; + classp = of_get_property(dn, "class-code", NULL); + if (classp) + class = of_read_number(classp, 1); + + if (fn) { + ret = fn(dn, data); + if (ret) + return ret; + } + + /* If we are a PCI bridge, go down */ + if (dn->child && ((class >> 8) == PCI_CLASS_BRIDGE_PCI || + (class >> 8) == PCI_CLASS_BRIDGE_CARDBUS)) + /* Depth first...do children */ + nextdn = dn->child; + else if (dn->sibling) + /* ok, try next sibling instead. */ + nextdn = dn->sibling; + if (!nextdn) { + /* Walk up to next valid sibling. */ + do { + dn = dn->parent; + if (dn == start) + return NULL; + } while (dn->sibling == NULL); + nextdn = dn->sibling; + } + } + return NULL; +} +EXPORT_SYMBOL_GPL(pci_traverse_device_nodes); + +static void *add_pdn(struct device_node *dn, void *data) +{ + struct pci_controller *hose = data; + struct pci_dn *pdn; + + pdn = pci_add_device_node_info(hose, dn); + if (!pdn) + return ERR_PTR(-ENOMEM); + + return NULL; +} + +/** + * pci_devs_phb_init_dynamic - setup pci devices under this PHB + * phb: pci-to-host bridge (top-level bridge connecting to cpu) + * + * This routine is called both during boot, (before the memory + * subsystem is set up, before kmalloc is valid) and during the + * dynamic lpar operation of adding a PHB to a running system. + */ +void pci_devs_phb_init_dynamic(struct pci_controller *phb) +{ + struct device_node *dn = phb->dn; + struct pci_dn *pdn; + + /* PHB nodes themselves must not match */ + pdn = pci_add_device_node_info(phb, dn); + if (pdn) { + pdn->devfn = pdn->busno = -1; + pdn->vendor_id = pdn->device_id = pdn->class_code = 0; + pdn->phb = phb; + phb->pci_data = pdn; + } + + /* Update dn->phb ptrs for new phb and children devices */ + pci_traverse_device_nodes(dn, add_pdn, phb); +} + +static void pci_dev_pdn_setup(struct pci_dev *pdev) +{ + struct pci_dn *pdn; + + if (pdev->dev.archdata.pci_data) + return; + + /* Setup the fast path */ + pdn = pci_get_pdn(pdev); + pdev->dev.archdata.pci_data = pdn; +} +DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, pci_dev_pdn_setup); -- cgit v1.2.3