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/pci/pci-label.c | 231 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 231 insertions(+) create mode 100644 drivers/pci/pci-label.c (limited to 'drivers/pci/pci-label.c') diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c new file mode 100644 index 000000000..0c6446519 --- /dev/null +++ b/drivers/pci/pci-label.c @@ -0,0 +1,231 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Export the firmware instance and label associated with a PCI device to + * sysfs + * + * Copyright (C) 2010 Dell Inc. + * by Narendra K , + * Jordan Hargrave + * + * PCI Firmware Specification Revision 3.1 section 4.6.7 (DSM for Naming a + * PCI or PCI Express Device Under Operating Systems) defines an instance + * number and string name. This code retrieves them and exports them to sysfs. + * If the system firmware does not provide the ACPI _DSM (Device Specific + * Method), then the SMBIOS type 41 instance number and string is exported to + * sysfs. + * + * SMBIOS defines type 41 for onboard pci devices. This code retrieves + * the instance number and string from the type 41 record and exports + * it to sysfs. + * + * Please see https://linux.dell.com/files/biosdevname/ for more + * information. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "pci.h" + +static bool device_has_acpi_name(struct device *dev) +{ +#ifdef CONFIG_ACPI + acpi_handle handle = ACPI_HANDLE(dev); + + if (!handle) + return false; + + return acpi_check_dsm(handle, &pci_acpi_dsm_guid, 0x2, + 1 << DSM_PCI_DEVICE_NAME); +#else + return false; +#endif +} + +#ifdef CONFIG_DMI +enum smbios_attr_enum { + SMBIOS_ATTR_NONE = 0, + SMBIOS_ATTR_LABEL_SHOW, + SMBIOS_ATTR_INSTANCE_SHOW, +}; + +static size_t find_smbios_instance_string(struct pci_dev *pdev, char *buf, + enum smbios_attr_enum attribute) +{ + const struct dmi_device *dmi; + struct dmi_dev_onboard *donboard; + int domain_nr = pci_domain_nr(pdev->bus); + int bus = pdev->bus->number; + int devfn = pdev->devfn; + + dmi = NULL; + while ((dmi = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, + NULL, dmi)) != NULL) { + donboard = dmi->device_data; + if (donboard && donboard->segment == domain_nr && + donboard->bus == bus && + donboard->devfn == devfn) { + if (buf) { + if (attribute == SMBIOS_ATTR_INSTANCE_SHOW) + return sysfs_emit(buf, "%d\n", + donboard->instance); + else if (attribute == SMBIOS_ATTR_LABEL_SHOW) + return sysfs_emit(buf, "%s\n", + dmi->name); + } + return strlen(dmi->name); + } + } + return 0; +} + +static ssize_t smbios_label_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + return find_smbios_instance_string(pdev, buf, + SMBIOS_ATTR_LABEL_SHOW); +} +static struct device_attribute dev_attr_smbios_label = __ATTR(label, 0444, + smbios_label_show, NULL); + +static ssize_t index_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev); + + return find_smbios_instance_string(pdev, buf, + SMBIOS_ATTR_INSTANCE_SHOW); +} +static DEVICE_ATTR_RO(index); + +static struct attribute *smbios_attrs[] = { + &dev_attr_smbios_label.attr, + &dev_attr_index.attr, + NULL, +}; + +static umode_t smbios_attr_is_visible(struct kobject *kobj, struct attribute *a, + int n) +{ + struct device *dev = kobj_to_dev(kobj); + struct pci_dev *pdev = to_pci_dev(dev); + + if (device_has_acpi_name(dev)) + return 0; + + if (!find_smbios_instance_string(pdev, NULL, SMBIOS_ATTR_NONE)) + return 0; + + return a->mode; +} + +const struct attribute_group pci_dev_smbios_attr_group = { + .attrs = smbios_attrs, + .is_visible = smbios_attr_is_visible, +}; +#endif + +#ifdef CONFIG_ACPI +enum acpi_attr_enum { + ACPI_ATTR_LABEL_SHOW, + ACPI_ATTR_INDEX_SHOW, +}; + +static int dsm_label_utf16s_to_utf8s(union acpi_object *obj, char *buf) +{ + int len; + + len = utf16s_to_utf8s((const wchar_t *)obj->buffer.pointer, + obj->buffer.length, + UTF16_LITTLE_ENDIAN, + buf, PAGE_SIZE - 1); + buf[len++] = '\n'; + + return len; +} + +static int dsm_get_label(struct device *dev, char *buf, + enum acpi_attr_enum attr) +{ + acpi_handle handle = ACPI_HANDLE(dev); + union acpi_object *obj, *tmp; + int len = 0; + + if (!handle) + return -1; + + obj = acpi_evaluate_dsm(handle, &pci_acpi_dsm_guid, 0x2, + DSM_PCI_DEVICE_NAME, NULL); + if (!obj) + return -1; + + tmp = obj->package.elements; + if (obj->type == ACPI_TYPE_PACKAGE && obj->package.count == 2 && + tmp[0].type == ACPI_TYPE_INTEGER && + (tmp[1].type == ACPI_TYPE_STRING || + tmp[1].type == ACPI_TYPE_BUFFER)) { + /* + * The second string element is optional even when + * this _DSM is implemented; when not implemented, + * this entry must return a null string. + */ + if (attr == ACPI_ATTR_INDEX_SHOW) { + len = sysfs_emit(buf, "%llu\n", tmp->integer.value); + } else if (attr == ACPI_ATTR_LABEL_SHOW) { + if (tmp[1].type == ACPI_TYPE_STRING) + len = sysfs_emit(buf, "%s\n", + tmp[1].string.pointer); + else if (tmp[1].type == ACPI_TYPE_BUFFER) + len = dsm_label_utf16s_to_utf8s(tmp + 1, buf); + } + } + + ACPI_FREE(obj); + + return len > 0 ? len : -1; +} + +static ssize_t label_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + return dsm_get_label(dev, buf, ACPI_ATTR_LABEL_SHOW); +} +static DEVICE_ATTR_RO(label); + +static ssize_t acpi_index_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return dsm_get_label(dev, buf, ACPI_ATTR_INDEX_SHOW); +} +static DEVICE_ATTR_RO(acpi_index); + +static struct attribute *acpi_attrs[] = { + &dev_attr_label.attr, + &dev_attr_acpi_index.attr, + NULL, +}; + +static umode_t acpi_attr_is_visible(struct kobject *kobj, struct attribute *a, + int n) +{ + struct device *dev = kobj_to_dev(kobj); + + if (!device_has_acpi_name(dev)) + return 0; + + return a->mode; +} + +const struct attribute_group pci_dev_acpi_attr_group = { + .attrs = acpi_attrs, + .is_visible = acpi_attr_is_visible, +}; +#endif -- cgit v1.2.3