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(). ... --- crypto/async_tx/async_tx.c | 281 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 281 insertions(+) create mode 100644 crypto/async_tx/async_tx.c (limited to 'crypto/async_tx/async_tx.c') diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c new file mode 100644 index 000000000..925693431 --- /dev/null +++ b/crypto/async_tx/async_tx.c @@ -0,0 +1,281 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * core routines for the asynchronous memory transfer/transform api + * + * Copyright © 2006, Intel Corporation. + * + * Dan Williams + * + * with architecture considerations by: + * Neil Brown + * Jeff Garzik + */ +#include +#include +#include +#include + +#ifdef CONFIG_DMA_ENGINE +static int __init async_tx_init(void) +{ + async_dmaengine_get(); + + printk(KERN_INFO "async_tx: api initialized (async)\n"); + + return 0; +} + +static void __exit async_tx_exit(void) +{ + async_dmaengine_put(); +} + +module_init(async_tx_init); +module_exit(async_tx_exit); + +/** + * __async_tx_find_channel - find a channel to carry out the operation or let + * the transaction execute synchronously + * @submit: transaction dependency and submission modifiers + * @tx_type: transaction type + */ +struct dma_chan * +__async_tx_find_channel(struct async_submit_ctl *submit, + enum dma_transaction_type tx_type) +{ + struct dma_async_tx_descriptor *depend_tx = submit->depend_tx; + + /* see if we can keep the chain on one channel */ + if (depend_tx && + dma_has_cap(tx_type, depend_tx->chan->device->cap_mask)) + return depend_tx->chan; + return async_dma_find_channel(tx_type); +} +EXPORT_SYMBOL_GPL(__async_tx_find_channel); +#endif + + +/** + * async_tx_channel_switch - queue an interrupt descriptor with a dependency + * pre-attached. + * @depend_tx: the operation that must finish before the new operation runs + * @tx: the new operation + */ +static void +async_tx_channel_switch(struct dma_async_tx_descriptor *depend_tx, + struct dma_async_tx_descriptor *tx) +{ + struct dma_chan *chan = depend_tx->chan; + struct dma_device *device = chan->device; + struct dma_async_tx_descriptor *intr_tx = (void *) ~0; + + /* first check to see if we can still append to depend_tx */ + txd_lock(depend_tx); + if (txd_parent(depend_tx) && depend_tx->chan == tx->chan) { + txd_chain(depend_tx, tx); + intr_tx = NULL; + } + txd_unlock(depend_tx); + + /* attached dependency, flush the parent channel */ + if (!intr_tx) { + device->device_issue_pending(chan); + return; + } + + /* see if we can schedule an interrupt + * otherwise poll for completion + */ + if (dma_has_cap(DMA_INTERRUPT, device->cap_mask)) + intr_tx = device->device_prep_dma_interrupt(chan, 0); + else + intr_tx = NULL; + + if (intr_tx) { + intr_tx->callback = NULL; + intr_tx->callback_param = NULL; + /* safe to chain outside the lock since we know we are + * not submitted yet + */ + txd_chain(intr_tx, tx); + + /* check if we need to append */ + txd_lock(depend_tx); + if (txd_parent(depend_tx)) { + txd_chain(depend_tx, intr_tx); + async_tx_ack(intr_tx); + intr_tx = NULL; + } + txd_unlock(depend_tx); + + if (intr_tx) { + txd_clear_parent(intr_tx); + intr_tx->tx_submit(intr_tx); + async_tx_ack(intr_tx); + } + device->device_issue_pending(chan); + } else { + if (dma_wait_for_async_tx(depend_tx) != DMA_COMPLETE) + panic("%s: DMA error waiting for depend_tx\n", + __func__); + tx->tx_submit(tx); + } +} + + +/** + * submit_disposition - flags for routing an incoming operation + * @ASYNC_TX_SUBMITTED: we were able to append the new operation under the lock + * @ASYNC_TX_CHANNEL_SWITCH: when the lock is dropped schedule a channel switch + * @ASYNC_TX_DIRECT_SUBMIT: when the lock is dropped submit directly + * + * while holding depend_tx->lock we must avoid submitting new operations + * to prevent a circular locking dependency with drivers that already + * hold a channel lock when calling async_tx_run_dependencies. + */ +enum submit_disposition { + ASYNC_TX_SUBMITTED, + ASYNC_TX_CHANNEL_SWITCH, + ASYNC_TX_DIRECT_SUBMIT, +}; + +void +async_tx_submit(struct dma_chan *chan, struct dma_async_tx_descriptor *tx, + struct async_submit_ctl *submit) +{ + struct dma_async_tx_descriptor *depend_tx = submit->depend_tx; + + tx->callback = submit->cb_fn; + tx->callback_param = submit->cb_param; + + if (depend_tx) { + enum submit_disposition s; + + /* sanity check the dependency chain: + * 1/ if ack is already set then we cannot be sure + * we are referring to the correct operation + * 2/ dependencies are 1:1 i.e. two transactions can + * not depend on the same parent + */ + BUG_ON(async_tx_test_ack(depend_tx) || txd_next(depend_tx) || + txd_parent(tx)); + + /* the lock prevents async_tx_run_dependencies from missing + * the setting of ->next when ->parent != NULL + */ + txd_lock(depend_tx); + if (txd_parent(depend_tx)) { + /* we have a parent so we can not submit directly + * if we are staying on the same channel: append + * else: channel switch + */ + if (depend_tx->chan == chan) { + txd_chain(depend_tx, tx); + s = ASYNC_TX_SUBMITTED; + } else + s = ASYNC_TX_CHANNEL_SWITCH; + } else { + /* we do not have a parent so we may be able to submit + * directly if we are staying on the same channel + */ + if (depend_tx->chan == chan) + s = ASYNC_TX_DIRECT_SUBMIT; + else + s = ASYNC_TX_CHANNEL_SWITCH; + } + txd_unlock(depend_tx); + + switch (s) { + case ASYNC_TX_SUBMITTED: + break; + case ASYNC_TX_CHANNEL_SWITCH: + async_tx_channel_switch(depend_tx, tx); + break; + case ASYNC_TX_DIRECT_SUBMIT: + txd_clear_parent(tx); + tx->tx_submit(tx); + break; + } + } else { + txd_clear_parent(tx); + tx->tx_submit(tx); + } + + if (submit->flags & ASYNC_TX_ACK) + async_tx_ack(tx); + + if (depend_tx) + async_tx_ack(depend_tx); +} +EXPORT_SYMBOL_GPL(async_tx_submit); + +/** + * async_trigger_callback - schedules the callback function to be run + * @submit: submission and completion parameters + * + * honored flags: ASYNC_TX_ACK + * + * The callback is run after any dependent operations have completed. + */ +struct dma_async_tx_descriptor * +async_trigger_callback(struct async_submit_ctl *submit) +{ + struct dma_chan *chan; + struct dma_device *device; + struct dma_async_tx_descriptor *tx; + struct dma_async_tx_descriptor *depend_tx = submit->depend_tx; + + if (depend_tx) { + chan = depend_tx->chan; + device = chan->device; + + /* see if we can schedule an interrupt + * otherwise poll for completion + */ + if (device && !dma_has_cap(DMA_INTERRUPT, device->cap_mask)) + device = NULL; + + tx = device ? device->device_prep_dma_interrupt(chan, 0) : NULL; + } else + tx = NULL; + + if (tx) { + pr_debug("%s: (async)\n", __func__); + + async_tx_submit(chan, tx, submit); + } else { + pr_debug("%s: (sync)\n", __func__); + + /* wait for any prerequisite operations */ + async_tx_quiesce(&submit->depend_tx); + + async_tx_sync_epilog(submit); + } + + return tx; +} +EXPORT_SYMBOL_GPL(async_trigger_callback); + +/** + * async_tx_quiesce - ensure tx is complete and freeable upon return + * @tx - transaction to quiesce + */ +void async_tx_quiesce(struct dma_async_tx_descriptor **tx) +{ + if (*tx) { + /* if ack is already set then we cannot be sure + * we are referring to the correct operation + */ + BUG_ON(async_tx_test_ack(*tx)); + if (dma_wait_for_async_tx(*tx) != DMA_COMPLETE) + panic("%s: DMA error waiting for transaction\n", + __func__); + async_tx_ack(*tx); + *tx = NULL; + } +} +EXPORT_SYMBOL_GPL(async_tx_quiesce); + +MODULE_AUTHOR("Intel Corporation"); +MODULE_DESCRIPTION("Asynchronous Bulk Memory Transactions API"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3