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(). ... --- net/ncsi/ncsi-cmd.c | 407 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 407 insertions(+) create mode 100644 net/ncsi/ncsi-cmd.c (limited to 'net/ncsi/ncsi-cmd.c') diff --git a/net/ncsi/ncsi-cmd.c b/net/ncsi/ncsi-cmd.c new file mode 100644 index 000000000..fd2236ee9 --- /dev/null +++ b/net/ncsi/ncsi-cmd.c @@ -0,0 +1,407 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright Gavin Shan, IBM Corporation 2016. + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include "internal.h" +#include "ncsi-pkt.h" + +static const int padding_bytes = 26; + +u32 ncsi_calculate_checksum(unsigned char *data, int len) +{ + u32 checksum = 0; + int i; + + for (i = 0; i < len; i += 2) + checksum += (((u32)data[i] << 8) | data[i + 1]); + + checksum = (~checksum + 1); + return checksum; +} + +/* This function should be called after the data area has been + * populated completely. + */ +static void ncsi_cmd_build_header(struct ncsi_pkt_hdr *h, + struct ncsi_cmd_arg *nca) +{ + u32 checksum; + __be32 *pchecksum; + + h->mc_id = 0; + h->revision = NCSI_PKT_REVISION; + h->reserved = 0; + h->id = nca->id; + h->type = nca->type; + h->channel = NCSI_TO_CHANNEL(nca->package, + nca->channel); + h->length = htons(nca->payload); + h->reserved1[0] = 0; + h->reserved1[1] = 0; + + /* Fill with calculated checksum */ + checksum = ncsi_calculate_checksum((unsigned char *)h, + sizeof(*h) + nca->payload); + pchecksum = (__be32 *)((void *)h + sizeof(struct ncsi_pkt_hdr) + + ALIGN(nca->payload, 4)); + *pchecksum = htonl(checksum); +} + +static int ncsi_cmd_handler_default(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_pkt *cmd; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_sp(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_sp_pkt *cmd; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + cmd->hw_arbitration = nca->bytes[0]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_dc(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_dc_pkt *cmd; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + cmd->ald = nca->bytes[0]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_rc(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_rc_pkt *cmd; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_ae(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_ae_pkt *cmd; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + cmd->mc_id = nca->bytes[0]; + cmd->mode = htonl(nca->dwords[1]); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_sl(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_sl_pkt *cmd; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + cmd->mode = htonl(nca->dwords[0]); + cmd->oem_mode = htonl(nca->dwords[1]); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_svf(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_svf_pkt *cmd; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + cmd->vlan = htons(nca->words[1]); + cmd->index = nca->bytes[6]; + cmd->enable = nca->bytes[7]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_ev(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_ev_pkt *cmd; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + cmd->mode = nca->bytes[3]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_sma(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_sma_pkt *cmd; + int i; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + for (i = 0; i < 6; i++) + cmd->mac[i] = nca->bytes[i]; + cmd->index = nca->bytes[6]; + cmd->at_e = nca->bytes[7]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_ebf(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_ebf_pkt *cmd; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + cmd->mode = htonl(nca->dwords[0]); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_egmf(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_egmf_pkt *cmd; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + cmd->mode = htonl(nca->dwords[0]); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_snfc(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_snfc_pkt *cmd; + + cmd = skb_put_zero(skb, sizeof(*cmd)); + cmd->mode = nca->bytes[0]; + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static int ncsi_cmd_handler_oem(struct sk_buff *skb, + struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_oem_pkt *cmd; + unsigned int len; + int payload; + /* NC-SI spec DSP_0222_1.2.0, section 8.2.2.2 + * requires payload to be padded with 0 to + * 32-bit boundary before the checksum field. + * Ensure the padding bytes are accounted for in + * skb allocation + */ + + payload = ALIGN(nca->payload, 4); + len = sizeof(struct ncsi_cmd_pkt_hdr) + 4; + len += max(payload, padding_bytes); + + cmd = skb_put_zero(skb, len); + unsafe_memcpy(&cmd->mfr_id, nca->data, nca->payload, + /* skb allocated with enough to load the payload */); + ncsi_cmd_build_header(&cmd->cmd.common, nca); + + return 0; +} + +static struct ncsi_cmd_handler { + unsigned char type; + int payload; + int (*handler)(struct sk_buff *skb, + struct ncsi_cmd_arg *nca); +} ncsi_cmd_handlers[] = { + { NCSI_PKT_CMD_CIS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_SP, 4, ncsi_cmd_handler_sp }, + { NCSI_PKT_CMD_DP, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_EC, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_DC, 4, ncsi_cmd_handler_dc }, + { NCSI_PKT_CMD_RC, 4, ncsi_cmd_handler_rc }, + { NCSI_PKT_CMD_ECNT, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_DCNT, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_AE, 8, ncsi_cmd_handler_ae }, + { NCSI_PKT_CMD_SL, 8, ncsi_cmd_handler_sl }, + { NCSI_PKT_CMD_GLS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_SVF, 8, ncsi_cmd_handler_svf }, + { NCSI_PKT_CMD_EV, 4, ncsi_cmd_handler_ev }, + { NCSI_PKT_CMD_DV, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_SMA, 8, ncsi_cmd_handler_sma }, + { NCSI_PKT_CMD_EBF, 4, ncsi_cmd_handler_ebf }, + { NCSI_PKT_CMD_DBF, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_EGMF, 4, ncsi_cmd_handler_egmf }, + { NCSI_PKT_CMD_DGMF, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_SNFC, 4, ncsi_cmd_handler_snfc }, + { NCSI_PKT_CMD_GVI, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GC, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GP, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GCPS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GNS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GNPTS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_GPS, 0, ncsi_cmd_handler_default }, + { NCSI_PKT_CMD_OEM, -1, ncsi_cmd_handler_oem }, + { NCSI_PKT_CMD_PLDM, 0, NULL }, + { NCSI_PKT_CMD_GPUUID, 0, ncsi_cmd_handler_default } +}; + +static struct ncsi_request *ncsi_alloc_command(struct ncsi_cmd_arg *nca) +{ + struct ncsi_dev_priv *ndp = nca->ndp; + struct ncsi_dev *nd = &ndp->ndev; + struct net_device *dev = nd->dev; + int hlen = LL_RESERVED_SPACE(dev); + int tlen = dev->needed_tailroom; + int payload; + int len = hlen + tlen; + struct sk_buff *skb; + struct ncsi_request *nr; + + nr = ncsi_alloc_request(ndp, nca->req_flags); + if (!nr) + return NULL; + + /* NCSI command packet has 16-bytes header, payload, 4 bytes checksum. + * Payload needs padding so that the checksum field following payload is + * aligned to 32-bit boundary. + * The packet needs padding if its payload is less than 26 bytes to + * meet 64 bytes minimal ethernet frame length. + */ + len += sizeof(struct ncsi_cmd_pkt_hdr) + 4; + payload = ALIGN(nca->payload, 4); + len += max(payload, padding_bytes); + + /* Allocate skb */ + skb = alloc_skb(len, GFP_ATOMIC); + if (!skb) { + ncsi_free_request(nr); + return NULL; + } + + nr->cmd = skb; + skb_reserve(skb, hlen); + skb_reset_network_header(skb); + + skb->dev = dev; + skb->protocol = htons(ETH_P_NCSI); + + return nr; +} + +int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca) +{ + struct ncsi_cmd_handler *nch = NULL; + struct ncsi_request *nr; + unsigned char type; + struct ethhdr *eh; + int i, ret; + + /* Use OEM generic handler for Netlink request */ + if (nca->req_flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) + type = NCSI_PKT_CMD_OEM; + else + type = nca->type; + + /* Search for the handler */ + for (i = 0; i < ARRAY_SIZE(ncsi_cmd_handlers); i++) { + if (ncsi_cmd_handlers[i].type == type) { + if (ncsi_cmd_handlers[i].handler) + nch = &ncsi_cmd_handlers[i]; + else + nch = NULL; + + break; + } + } + + if (!nch) { + netdev_err(nca->ndp->ndev.dev, + "Cannot send packet with type 0x%02x\n", nca->type); + return -ENOENT; + } + + /* Get packet payload length and allocate the request + * It is expected that if length set as negative in + * handler structure means caller is initializing it + * and setting length in nca before calling xmit function + */ + if (nch->payload >= 0) + nca->payload = nch->payload; + nr = ncsi_alloc_command(nca); + if (!nr) + return -ENOMEM; + + /* track netlink information */ + if (nca->req_flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) { + nr->snd_seq = nca->info->snd_seq; + nr->snd_portid = nca->info->snd_portid; + nr->nlhdr = *nca->info->nlhdr; + } + + /* Prepare the packet */ + nca->id = nr->id; + ret = nch->handler(nr->cmd, nca); + if (ret) { + ncsi_free_request(nr); + return ret; + } + + /* Fill the ethernet header */ + eh = skb_push(nr->cmd, sizeof(*eh)); + eh->h_proto = htons(ETH_P_NCSI); + eth_broadcast_addr(eh->h_dest); + + /* If mac address received from device then use it for + * source address as unicast address else use broadcast + * address as source address + */ + if (nca->ndp->gma_flag == 1) + memcpy(eh->h_source, nca->ndp->ndev.dev->dev_addr, ETH_ALEN); + else + eth_broadcast_addr(eh->h_source); + + /* Start the timer for the request that might not have + * corresponding response. Given NCSI is an internal + * connection a 1 second delay should be sufficient. + */ + nr->enabled = true; + mod_timer(&nr->timer, jiffies + 1 * HZ); + + /* Send NCSI packet */ + skb_get(nr->cmd); + ret = dev_queue_xmit(nr->cmd); + if (ret < 0) { + ncsi_free_request(nr); + return ret; + } + + return 0; +} -- cgit v1.2.3