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/firmware/google/vpd.c | 320 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 320 insertions(+) create mode 100644 drivers/firmware/google/vpd.c (limited to 'drivers/firmware/google/vpd.c') diff --git a/drivers/firmware/google/vpd.c b/drivers/firmware/google/vpd.c new file mode 100644 index 000000000..ee6e08c05 --- /dev/null +++ b/drivers/firmware/google/vpd.c @@ -0,0 +1,320 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * vpd.c + * + * Driver for exporting VPD content to sysfs. + * + * Copyright 2017 Google Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "coreboot_table.h" +#include "vpd_decode.h" + +#define CB_TAG_VPD 0x2c +#define VPD_CBMEM_MAGIC 0x43524f53 + +static struct kobject *vpd_kobj; + +struct vpd_cbmem { + u32 magic; + u32 version; + u32 ro_size; + u32 rw_size; + u8 blob[]; +}; + +struct vpd_section { + bool enabled; + const char *name; + char *raw_name; /* the string name_raw */ + struct kobject *kobj; /* vpd/name directory */ + char *baseaddr; + struct bin_attribute bin_attr; /* vpd/name_raw bin_attribute */ + struct list_head attribs; /* key/value in vpd_attrib_info list */ +}; + +struct vpd_attrib_info { + char *key; + const char *value; + struct bin_attribute bin_attr; + struct list_head list; +}; + +static struct vpd_section ro_vpd; +static struct vpd_section rw_vpd; + +static ssize_t vpd_attrib_read(struct file *filp, struct kobject *kobp, + struct bin_attribute *bin_attr, char *buf, + loff_t pos, size_t count) +{ + struct vpd_attrib_info *info = bin_attr->private; + + return memory_read_from_buffer(buf, count, &pos, info->value, + info->bin_attr.size); +} + +/* + * vpd_section_check_key_name() + * + * The VPD specification supports only [a-zA-Z0-9_]+ characters in key names but + * old firmware versions may have entries like "S/N" which are problematic when + * exporting them as sysfs attributes. These keys present in old firmwares are + * ignored. + * + * Returns VPD_OK for a valid key name, VPD_FAIL otherwise. + * + * @key: The key name to check + * @key_len: key name length + */ +static int vpd_section_check_key_name(const u8 *key, s32 key_len) +{ + int c; + + while (key_len-- > 0) { + c = *key++; + + if (!isalnum(c) && c != '_') + return VPD_FAIL; + } + + return VPD_OK; +} + +static int vpd_section_attrib_add(const u8 *key, u32 key_len, + const u8 *value, u32 value_len, + void *arg) +{ + int ret; + struct vpd_section *sec = arg; + struct vpd_attrib_info *info; + + /* + * Return VPD_OK immediately to decode next entry if the current key + * name contains invalid characters. + */ + if (vpd_section_check_key_name(key, key_len) != VPD_OK) + return VPD_OK; + + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->key = kstrndup(key, key_len, GFP_KERNEL); + if (!info->key) { + ret = -ENOMEM; + goto free_info; + } + + sysfs_bin_attr_init(&info->bin_attr); + info->bin_attr.attr.name = info->key; + info->bin_attr.attr.mode = 0444; + info->bin_attr.size = value_len; + info->bin_attr.read = vpd_attrib_read; + info->bin_attr.private = info; + + info->value = value; + + INIT_LIST_HEAD(&info->list); + + ret = sysfs_create_bin_file(sec->kobj, &info->bin_attr); + if (ret) + goto free_info_key; + + list_add_tail(&info->list, &sec->attribs); + return 0; + +free_info_key: + kfree(info->key); +free_info: + kfree(info); + + return ret; +} + +static void vpd_section_attrib_destroy(struct vpd_section *sec) +{ + struct vpd_attrib_info *info; + struct vpd_attrib_info *temp; + + list_for_each_entry_safe(info, temp, &sec->attribs, list) { + sysfs_remove_bin_file(sec->kobj, &info->bin_attr); + kfree(info->key); + kfree(info); + } +} + +static ssize_t vpd_section_read(struct file *filp, struct kobject *kobp, + struct bin_attribute *bin_attr, char *buf, + loff_t pos, size_t count) +{ + struct vpd_section *sec = bin_attr->private; + + return memory_read_from_buffer(buf, count, &pos, sec->baseaddr, + sec->bin_attr.size); +} + +static int vpd_section_create_attribs(struct vpd_section *sec) +{ + s32 consumed; + int ret; + + consumed = 0; + do { + ret = vpd_decode_string(sec->bin_attr.size, sec->baseaddr, + &consumed, vpd_section_attrib_add, sec); + } while (ret == VPD_OK); + + return 0; +} + +static int vpd_section_init(const char *name, struct vpd_section *sec, + phys_addr_t physaddr, size_t size) +{ + int err; + + sec->baseaddr = memremap(physaddr, size, MEMREMAP_WB); + if (!sec->baseaddr) + return -ENOMEM; + + sec->name = name; + + /* We want to export the raw partition with name ${name}_raw */ + sec->raw_name = kasprintf(GFP_KERNEL, "%s_raw", name); + if (!sec->raw_name) { + err = -ENOMEM; + goto err_memunmap; + } + + sysfs_bin_attr_init(&sec->bin_attr); + sec->bin_attr.attr.name = sec->raw_name; + sec->bin_attr.attr.mode = 0444; + sec->bin_attr.size = size; + sec->bin_attr.read = vpd_section_read; + sec->bin_attr.private = sec; + + err = sysfs_create_bin_file(vpd_kobj, &sec->bin_attr); + if (err) + goto err_free_raw_name; + + sec->kobj = kobject_create_and_add(name, vpd_kobj); + if (!sec->kobj) { + err = -EINVAL; + goto err_sysfs_remove; + } + + INIT_LIST_HEAD(&sec->attribs); + vpd_section_create_attribs(sec); + + sec->enabled = true; + + return 0; + +err_sysfs_remove: + sysfs_remove_bin_file(vpd_kobj, &sec->bin_attr); +err_free_raw_name: + kfree(sec->raw_name); +err_memunmap: + memunmap(sec->baseaddr); + return err; +} + +static int vpd_section_destroy(struct vpd_section *sec) +{ + if (sec->enabled) { + vpd_section_attrib_destroy(sec); + kobject_put(sec->kobj); + sysfs_remove_bin_file(vpd_kobj, &sec->bin_attr); + kfree(sec->raw_name); + memunmap(sec->baseaddr); + sec->enabled = false; + } + + return 0; +} + +static int vpd_sections_init(phys_addr_t physaddr) +{ + struct vpd_cbmem *temp; + struct vpd_cbmem header; + int ret = 0; + + temp = memremap(physaddr, sizeof(struct vpd_cbmem), MEMREMAP_WB); + if (!temp) + return -ENOMEM; + + memcpy(&header, temp, sizeof(struct vpd_cbmem)); + memunmap(temp); + + if (header.magic != VPD_CBMEM_MAGIC) + return -ENODEV; + + if (header.ro_size) { + ret = vpd_section_init("ro", &ro_vpd, + physaddr + sizeof(struct vpd_cbmem), + header.ro_size); + if (ret) + return ret; + } + + if (header.rw_size) { + ret = vpd_section_init("rw", &rw_vpd, + physaddr + sizeof(struct vpd_cbmem) + + header.ro_size, header.rw_size); + if (ret) { + vpd_section_destroy(&ro_vpd); + return ret; + } + } + + return 0; +} + +static int vpd_probe(struct coreboot_device *dev) +{ + int ret; + + vpd_kobj = kobject_create_and_add("vpd", firmware_kobj); + if (!vpd_kobj) + return -ENOMEM; + + ret = vpd_sections_init(dev->cbmem_ref.cbmem_addr); + if (ret) { + kobject_put(vpd_kobj); + return ret; + } + + return 0; +} + +static void vpd_remove(struct coreboot_device *dev) +{ + vpd_section_destroy(&ro_vpd); + vpd_section_destroy(&rw_vpd); + + kobject_put(vpd_kobj); +} + +static struct coreboot_driver vpd_driver = { + .probe = vpd_probe, + .remove = vpd_remove, + .drv = { + .name = "vpd", + }, + .tag = CB_TAG_VPD, +}; +module_coreboot_driver(vpd_driver); + +MODULE_AUTHOR("Google, Inc."); +MODULE_LICENSE("GPL"); -- cgit v1.2.3