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(). ... --- Documentation/PCI/endpoint/pci-test-howto.rst | 235 ++++++++++++++++++++++++++ 1 file changed, 235 insertions(+) create mode 100644 Documentation/PCI/endpoint/pci-test-howto.rst (limited to 'Documentation/PCI/endpoint/pci-test-howto.rst') diff --git a/Documentation/PCI/endpoint/pci-test-howto.rst b/Documentation/PCI/endpoint/pci-test-howto.rst new file mode 100644 index 000000000..909f770a0 --- /dev/null +++ b/Documentation/PCI/endpoint/pci-test-howto.rst @@ -0,0 +1,235 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=================== +PCI Test User Guide +=================== + +:Author: Kishon Vijay Abraham I + +This document is a guide to help users use pci-epf-test function driver +and pci_endpoint_test host driver for testing PCI. The list of steps to +be followed in the host side and EP side is given below. + +Endpoint Device +=============== + +Endpoint Controller Devices +--------------------------- + +To find the list of endpoint controller devices in the system:: + + # ls /sys/class/pci_epc/ + 51000000.pcie_ep + +If PCI_ENDPOINT_CONFIGFS is enabled:: + + # ls /sys/kernel/config/pci_ep/controllers + 51000000.pcie_ep + + +Endpoint Function Drivers +------------------------- + +To find the list of endpoint function drivers in the system:: + + # ls /sys/bus/pci-epf/drivers + pci_epf_test + +If PCI_ENDPOINT_CONFIGFS is enabled:: + + # ls /sys/kernel/config/pci_ep/functions + pci_epf_test + + +Creating pci-epf-test Device +---------------------------- + +PCI endpoint function device can be created using the configfs. To create +pci-epf-test device, the following commands can be used:: + + # mount -t configfs none /sys/kernel/config + # cd /sys/kernel/config/pci_ep/ + # mkdir functions/pci_epf_test/func1 + +The "mkdir func1" above creates the pci-epf-test function device that will +be probed by pci_epf_test driver. + +The PCI endpoint framework populates the directory with the following +configurable fields:: + + # ls functions/pci_epf_test/func1 + baseclass_code interrupt_pin progif_code subsys_id + cache_line_size msi_interrupts revid subsys_vendorid + deviceid msix_interrupts subclass_code vendorid + +The PCI endpoint function driver populates these entries with default values +when the device is bound to the driver. The pci-epf-test driver populates +vendorid with 0xffff and interrupt_pin with 0x0001:: + + # cat functions/pci_epf_test/func1/vendorid + 0xffff + # cat functions/pci_epf_test/func1/interrupt_pin + 0x0001 + + +Configuring pci-epf-test Device +------------------------------- + +The user can configure the pci-epf-test device using configfs entry. In order +to change the vendorid and the number of MSI interrupts used by the function +device, the following commands can be used:: + + # echo 0x104c > functions/pci_epf_test/func1/vendorid + # echo 0xb500 > functions/pci_epf_test/func1/deviceid + # echo 16 > functions/pci_epf_test/func1/msi_interrupts + # echo 8 > functions/pci_epf_test/func1/msix_interrupts + + +Binding pci-epf-test Device to EP Controller +-------------------------------------------- + +In order for the endpoint function device to be useful, it has to be bound to +a PCI endpoint controller driver. Use the configfs to bind the function +device to one of the controller driver present in the system:: + + # ln -s functions/pci_epf_test/func1 controllers/51000000.pcie_ep/ + +Once the above step is completed, the PCI endpoint is ready to establish a link +with the host. + + +Start the Link +-------------- + +In order for the endpoint device to establish a link with the host, the _start_ +field should be populated with '1':: + + # echo 1 > controllers/51000000.pcie_ep/start + + +RootComplex Device +================== + +lspci Output +------------ + +Note that the devices listed here correspond to the value populated in 1.4 +above:: + + 00:00.0 PCI bridge: Texas Instruments Device 8888 (rev 01) + 01:00.0 Unassigned class [ff00]: Texas Instruments Device b500 + + +Using Endpoint Test function Device +----------------------------------- + +pcitest.sh added in tools/pci/ can be used to run all the default PCI endpoint +tests. To compile this tool the following commands should be used:: + + # cd + # make -C tools/pci + +or if you desire to compile and install in your system:: + + # cd + # make -C tools/pci install + +The tool and script will be located in /usr/bin/ + + +pcitest.sh Output +~~~~~~~~~~~~~~~~~ +:: + + # pcitest.sh + BAR tests + + BAR0: OKAY + BAR1: OKAY + BAR2: OKAY + BAR3: OKAY + BAR4: NOT OKAY + BAR5: NOT OKAY + + Interrupt tests + + SET IRQ TYPE TO LEGACY: OKAY + LEGACY IRQ: NOT OKAY + SET IRQ TYPE TO MSI: OKAY + MSI1: OKAY + MSI2: OKAY + MSI3: OKAY + MSI4: OKAY + MSI5: OKAY + MSI6: OKAY + MSI7: OKAY + MSI8: OKAY + MSI9: OKAY + MSI10: OKAY + MSI11: OKAY + MSI12: OKAY + MSI13: OKAY + MSI14: OKAY + MSI15: OKAY + MSI16: OKAY + MSI17: NOT OKAY + MSI18: NOT OKAY + MSI19: NOT OKAY + MSI20: NOT OKAY + MSI21: NOT OKAY + MSI22: NOT OKAY + MSI23: NOT OKAY + MSI24: NOT OKAY + MSI25: NOT OKAY + MSI26: NOT OKAY + MSI27: NOT OKAY + MSI28: NOT OKAY + MSI29: NOT OKAY + MSI30: NOT OKAY + MSI31: NOT OKAY + MSI32: NOT OKAY + SET IRQ TYPE TO MSI-X: OKAY + MSI-X1: OKAY + MSI-X2: OKAY + MSI-X3: OKAY + MSI-X4: OKAY + MSI-X5: OKAY + MSI-X6: OKAY + MSI-X7: OKAY + MSI-X8: OKAY + MSI-X9: NOT OKAY + MSI-X10: NOT OKAY + MSI-X11: NOT OKAY + MSI-X12: NOT OKAY + MSI-X13: NOT OKAY + MSI-X14: NOT OKAY + MSI-X15: NOT OKAY + MSI-X16: NOT OKAY + [...] + MSI-X2047: NOT OKAY + MSI-X2048: NOT OKAY + + Read Tests + + SET IRQ TYPE TO MSI: OKAY + READ ( 1 bytes): OKAY + READ ( 1024 bytes): OKAY + READ ( 1025 bytes): OKAY + READ (1024000 bytes): OKAY + READ (1024001 bytes): OKAY + + Write Tests + + WRITE ( 1 bytes): OKAY + WRITE ( 1024 bytes): OKAY + WRITE ( 1025 bytes): OKAY + WRITE (1024000 bytes): OKAY + WRITE (1024001 bytes): OKAY + + Copy Tests + + COPY ( 1 bytes): OKAY + COPY ( 1024 bytes): OKAY + COPY ( 1025 bytes): OKAY + COPY (1024000 bytes): OKAY + COPY (1024001 bytes): OKAY -- cgit v1.2.3