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/net/ethernet/sfc/vfdi.h | 252 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 252 insertions(+) create mode 100644 drivers/net/ethernet/sfc/vfdi.h (limited to 'drivers/net/ethernet/sfc/vfdi.h') diff --git a/drivers/net/ethernet/sfc/vfdi.h b/drivers/net/ethernet/sfc/vfdi.h new file mode 100644 index 000000000..480b872eb --- /dev/null +++ b/drivers/net/ethernet/sfc/vfdi.h @@ -0,0 +1,252 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/**************************************************************************** + * Driver for Solarflare network controllers and boards + * Copyright 2010-2012 Solarflare Communications Inc. + */ +#ifndef _VFDI_H +#define _VFDI_H + +/** + * DOC: Virtual Function Driver Interface + * + * This file contains software structures used to form a two way + * communication channel between the VF driver and the PF driver, + * named Virtual Function Driver Interface (VFDI). + * + * For the purposes of VFDI, a page is a memory region with size and + * alignment of 4K. All addresses are DMA addresses to be used within + * the domain of the relevant VF. + * + * The only hardware-defined channels for a VF driver to communicate + * with the PF driver are the event mailboxes (%FR_CZ_USR_EV + * registers). Writing to these registers generates an event with + * EV_CODE = EV_CODE_USR_EV, USER_QID set to the index of the mailbox + * and USER_EV_REG_VALUE set to the value written. The PF driver may + * direct or disable delivery of these events by setting + * %FR_CZ_USR_EV_CFG. + * + * The PF driver can send arbitrary events to arbitrary event queues. + * However, for consistency, VFDI events from the PF are defined to + * follow the same form and be sent to the first event queue assigned + * to the VF while that queue is enabled by the VF driver. + * + * The general form of the variable bits of VFDI events is: + * + * 0 16 24 31 + * | DATA | TYPE | SEQ | + * + * SEQ is a sequence number which should be incremented by 1 (modulo + * 256) for each event. The sequence numbers used in each direction + * are independent. + * + * The VF submits requests of type &struct vfdi_req by sending the + * address of the request (ADDR) in a series of 4 events: + * + * 0 16 24 31 + * | ADDR[0:15] | VFDI_EV_TYPE_REQ_WORD0 | SEQ | + * | ADDR[16:31] | VFDI_EV_TYPE_REQ_WORD1 | SEQ+1 | + * | ADDR[32:47] | VFDI_EV_TYPE_REQ_WORD2 | SEQ+2 | + * | ADDR[48:63] | VFDI_EV_TYPE_REQ_WORD3 | SEQ+3 | + * + * The address must be page-aligned. After receiving such a valid + * series of events, the PF driver will attempt to read the request + * and write a response to the same address. In case of an invalid + * sequence of events or a DMA error, there will be no response. + * + * The VF driver may request that the PF driver writes status + * information into its domain asynchronously. After writing the + * status, the PF driver will send an event of the form: + * + * 0 16 24 31 + * | reserved | VFDI_EV_TYPE_STATUS | SEQ | + * + * In case the VF must be reset for any reason, the PF driver will + * send an event of the form: + * + * 0 16 24 31 + * | reserved | VFDI_EV_TYPE_RESET | SEQ | + * + * It is then the responsibility of the VF driver to request + * reinitialisation of its queues. + */ +#define VFDI_EV_SEQ_LBN 24 +#define VFDI_EV_SEQ_WIDTH 8 +#define VFDI_EV_TYPE_LBN 16 +#define VFDI_EV_TYPE_WIDTH 8 +#define VFDI_EV_TYPE_REQ_WORD0 0 +#define VFDI_EV_TYPE_REQ_WORD1 1 +#define VFDI_EV_TYPE_REQ_WORD2 2 +#define VFDI_EV_TYPE_REQ_WORD3 3 +#define VFDI_EV_TYPE_STATUS 4 +#define VFDI_EV_TYPE_RESET 5 +#define VFDI_EV_DATA_LBN 0 +#define VFDI_EV_DATA_WIDTH 16 + +struct vfdi_endpoint { + u8 mac_addr[ETH_ALEN]; + __be16 tci; +}; + +/** + * enum vfdi_op - VFDI operation enumeration + * @VFDI_OP_RESPONSE: Indicates a response to the request. + * @VFDI_OP_INIT_EVQ: Initialize SRAM entries and initialize an EVQ. + * @VFDI_OP_INIT_RXQ: Initialize SRAM entries and initialize an RXQ. + * @VFDI_OP_INIT_TXQ: Initialize SRAM entries and initialize a TXQ. + * @VFDI_OP_FINI_ALL_QUEUES: Flush all queues, finalize all queues, then + * finalize the SRAM entries. + * @VFDI_OP_INSERT_FILTER: Insert a MAC filter targeting the given RXQ. + * @VFDI_OP_REMOVE_ALL_FILTERS: Remove all filters. + * @VFDI_OP_SET_STATUS_PAGE: Set the DMA page(s) used for status updates + * from PF and write the initial status. + * @VFDI_OP_CLEAR_STATUS_PAGE: Clear the DMA page(s) used for status + * updates from PF. + */ +enum vfdi_op { + VFDI_OP_RESPONSE = 0, + VFDI_OP_INIT_EVQ = 1, + VFDI_OP_INIT_RXQ = 2, + VFDI_OP_INIT_TXQ = 3, + VFDI_OP_FINI_ALL_QUEUES = 4, + VFDI_OP_INSERT_FILTER = 5, + VFDI_OP_REMOVE_ALL_FILTERS = 6, + VFDI_OP_SET_STATUS_PAGE = 7, + VFDI_OP_CLEAR_STATUS_PAGE = 8, + VFDI_OP_LIMIT, +}; + +/* Response codes for VFDI operations. Other values may be used in future. */ +#define VFDI_RC_SUCCESS 0 +#define VFDI_RC_ENOMEM (-12) +#define VFDI_RC_EINVAL (-22) +#define VFDI_RC_EOPNOTSUPP (-95) +#define VFDI_RC_ETIMEDOUT (-110) + +/** + * struct vfdi_req - Request from VF driver to PF driver + * @op: Operation code or response indicator, taken from &enum vfdi_op. + * @rc: Response code. Set to 0 on success or a negative error code on failure. + * @u.init_evq.index: Index of event queue to create. + * @u.init_evq.buf_count: Number of 4k buffers backing event queue. + * @u.init_evq.addr: Array of length %u.init_evq.buf_count containing DMA + * address of each page backing the event queue. + * @u.init_rxq.index: Index of receive queue to create. + * @u.init_rxq.buf_count: Number of 4k buffers backing receive queue. + * @u.init_rxq.evq: Instance of event queue to target receive events at. + * @u.init_rxq.label: Label used in receive events. + * @u.init_rxq.flags: Unused. + * @u.init_rxq.addr: Array of length %u.init_rxq.buf_count containing DMA + * address of each page backing the receive queue. + * @u.init_txq.index: Index of transmit queue to create. + * @u.init_txq.buf_count: Number of 4k buffers backing transmit queue. + * @u.init_txq.evq: Instance of event queue to target transmit completion + * events at. + * @u.init_txq.label: Label used in transmit completion events. + * @u.init_txq.flags: Checksum offload flags. + * @u.init_txq.addr: Array of length %u.init_txq.buf_count containing DMA + * address of each page backing the transmit queue. + * @u.mac_filter.rxq: Insert MAC filter at VF local address/VLAN targeting + * all traffic at this receive queue. + * @u.mac_filter.flags: MAC filter flags. + * @u.set_status_page.dma_addr: Base address for the &struct vfdi_status. + * This address must be page-aligned and the PF may write up to a + * whole page (allowing for extension of the structure). + * @u.set_status_page.peer_page_count: Number of additional pages the VF + * has provided into which peer addresses may be DMAd. + * @u.set_status_page.peer_page_addr: Array of DMA addresses of pages. + * If the number of peers exceeds 256, then the VF must provide + * additional pages in this array. The PF will then DMA up to + * 512 vfdi_endpoint structures into each page. These addresses + * must be page-aligned. + */ +struct vfdi_req { + u32 op; + u32 reserved1; + s32 rc; + u32 reserved2; + union { + struct { + u32 index; + u32 buf_count; + u64 addr[]; + } init_evq; + struct { + u32 index; + u32 buf_count; + u32 evq; + u32 label; + u32 flags; +#define VFDI_RXQ_FLAG_SCATTER_EN 1 + u32 reserved; + u64 addr[]; + } init_rxq; + struct { + u32 index; + u32 buf_count; + u32 evq; + u32 label; + u32 flags; +#define VFDI_TXQ_FLAG_IP_CSUM_DIS 1 +#define VFDI_TXQ_FLAG_TCPUDP_CSUM_DIS 2 + u32 reserved; + u64 addr[]; + } init_txq; + struct { + u32 rxq; + u32 flags; +#define VFDI_MAC_FILTER_FLAG_RSS 1 +#define VFDI_MAC_FILTER_FLAG_SCATTER 2 + } mac_filter; + struct { + u64 dma_addr; + u64 peer_page_count; + u64 peer_page_addr[]; + } set_status_page; + } u; +}; + +/** + * struct vfdi_status - Status provided by PF driver to VF driver + * @generation_start: A generation count DMA'd to VF *before* the + * rest of the structure. + * @generation_end: A generation count DMA'd to VF *after* the + * rest of the structure. + * @version: Version of this structure; currently set to 1. Later + * versions must either be layout-compatible or only be sent to VFs + * that specifically request them. + * @length: Total length of this structure including embedded tables + * @vi_scale: log2 the number of VIs available on this VF. This quantity + * is used by the hardware for register decoding. + * @max_tx_channels: The maximum number of transmit queues the VF can use. + * @rss_rxq_count: The number of receive queues present in the shared RSS + * indirection table. + * @peer_count: Total number of peers in the complete peer list. If larger + * than ARRAY_SIZE(%peers), then the VF must provide sufficient + * additional pages each of which is filled with vfdi_endpoint structures. + * @local: The MAC address and outer VLAN tag of *this* VF + * @peers: Table of peer addresses. The @tci fields in these structures + * are currently unused and must be ignored. Additional peers are + * written into any additional pages provided by the VF. + * @timer_quantum_ns: Timer quantum (nominal period between timer ticks) + * for interrupt moderation timers, in nanoseconds. This member is only + * present if @length is sufficiently large. + */ +struct vfdi_status { + u32 generation_start; + u32 generation_end; + u32 version; + u32 length; + u8 vi_scale; + u8 max_tx_channels; + u8 rss_rxq_count; + u8 reserved1; + u16 peer_count; + u16 reserved2; + struct vfdi_endpoint local; + struct vfdi_endpoint peers[256]; + + /* Members below here extend version 1 of this structure */ + u32 timer_quantum_ns; +}; + +#endif -- cgit v1.2.3