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(). ... --- arch/alpha/lib/csum_partial_copy.c | 363 +++++++++++++++++++++++++++++++++++++ 1 file changed, 363 insertions(+) create mode 100644 arch/alpha/lib/csum_partial_copy.c (limited to 'arch/alpha/lib/csum_partial_copy.c') diff --git a/arch/alpha/lib/csum_partial_copy.c b/arch/alpha/lib/csum_partial_copy.c new file mode 100644 index 000000000..4d180d96f --- /dev/null +++ b/arch/alpha/lib/csum_partial_copy.c @@ -0,0 +1,363 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * csum_partial_copy - do IP checksumming and copy + * + * (C) Copyright 1996 Linus Torvalds + * accelerated versions (and 21264 assembly versions ) contributed by + * Rick Gorton + * + * Don't look at this too closely - you'll go mad. The things + * we do for performance.. + */ + +#include +#include +#include +#include + + +#define ldq_u(x,y) \ +__asm__ __volatile__("ldq_u %0,%1":"=r" (x):"m" (*(const unsigned long *)(y))) + +#define stq_u(x,y) \ +__asm__ __volatile__("stq_u %1,%0":"=m" (*(unsigned long *)(y)):"r" (x)) + +#define extql(x,y,z) \ +__asm__ __volatile__("extql %1,%2,%0":"=r" (z):"r" (x),"r" (y)) + +#define extqh(x,y,z) \ +__asm__ __volatile__("extqh %1,%2,%0":"=r" (z):"r" (x),"r" (y)) + +#define mskql(x,y,z) \ +__asm__ __volatile__("mskql %1,%2,%0":"=r" (z):"r" (x),"r" (y)) + +#define mskqh(x,y,z) \ +__asm__ __volatile__("mskqh %1,%2,%0":"=r" (z):"r" (x),"r" (y)) + +#define insql(x,y,z) \ +__asm__ __volatile__("insql %1,%2,%0":"=r" (z):"r" (x),"r" (y)) + +#define insqh(x,y,z) \ +__asm__ __volatile__("insqh %1,%2,%0":"=r" (z):"r" (x),"r" (y)) + +#define __get_word(insn,x,ptr) \ +({ \ + long __guu_err; \ + __asm__ __volatile__( \ + "1: "#insn" %0,%2\n" \ + "2:\n" \ + EXC(1b,2b,%0,%1) \ + : "=r"(x), "=r"(__guu_err) \ + : "m"(__m(ptr)), "1"(0)); \ + __guu_err; \ +}) + +static inline unsigned short from64to16(unsigned long x) +{ + /* Using extract instructions is a bit more efficient + than the original shift/bitmask version. */ + + union { + unsigned long ul; + unsigned int ui[2]; + unsigned short us[4]; + } in_v, tmp_v, out_v; + + in_v.ul = x; + tmp_v.ul = (unsigned long) in_v.ui[0] + (unsigned long) in_v.ui[1]; + + /* Since the bits of tmp_v.sh[3] are going to always be zero, + we don't have to bother to add that in. */ + out_v.ul = (unsigned long) tmp_v.us[0] + (unsigned long) tmp_v.us[1] + + (unsigned long) tmp_v.us[2]; + + /* Similarly, out_v.us[2] is always zero for the final add. */ + return out_v.us[0] + out_v.us[1]; +} + + + +/* + * Ok. This isn't fun, but this is the EASY case. + */ +static inline unsigned long +csum_partial_cfu_aligned(const unsigned long __user *src, unsigned long *dst, + long len) +{ + unsigned long checksum = ~0U; + unsigned long carry = 0; + + while (len >= 0) { + unsigned long word; + if (__get_word(ldq, word, src)) + return 0; + checksum += carry; + src++; + checksum += word; + len -= 8; + carry = checksum < word; + *dst = word; + dst++; + } + len += 8; + checksum += carry; + if (len) { + unsigned long word, tmp; + if (__get_word(ldq, word, src)) + return 0; + tmp = *dst; + mskql(word, len, word); + checksum += word; + mskqh(tmp, len, tmp); + carry = checksum < word; + *dst = word | tmp; + checksum += carry; + } + return checksum; +} + +/* + * This is even less fun, but this is still reasonably + * easy. + */ +static inline unsigned long +csum_partial_cfu_dest_aligned(const unsigned long __user *src, + unsigned long *dst, + unsigned long soff, + long len) +{ + unsigned long first; + unsigned long word, carry; + unsigned long lastsrc = 7+len+(unsigned long)src; + unsigned long checksum = ~0U; + + if (__get_word(ldq_u, first,src)) + return 0; + carry = 0; + while (len >= 0) { + unsigned long second; + + if (__get_word(ldq_u, second, src+1)) + return 0; + extql(first, soff, word); + len -= 8; + src++; + extqh(second, soff, first); + checksum += carry; + word |= first; + first = second; + checksum += word; + *dst = word; + dst++; + carry = checksum < word; + } + len += 8; + checksum += carry; + if (len) { + unsigned long tmp; + unsigned long second; + if (__get_word(ldq_u, second, lastsrc)) + return 0; + tmp = *dst; + extql(first, soff, word); + extqh(second, soff, first); + word |= first; + mskql(word, len, word); + checksum += word; + mskqh(tmp, len, tmp); + carry = checksum < word; + *dst = word | tmp; + checksum += carry; + } + return checksum; +} + +/* + * This is slightly less fun than the above.. + */ +static inline unsigned long +csum_partial_cfu_src_aligned(const unsigned long __user *src, + unsigned long *dst, + unsigned long doff, + long len, + unsigned long partial_dest) +{ + unsigned long carry = 0; + unsigned long word; + unsigned long second_dest; + unsigned long checksum = ~0U; + + mskql(partial_dest, doff, partial_dest); + while (len >= 0) { + if (__get_word(ldq, word, src)) + return 0; + len -= 8; + insql(word, doff, second_dest); + checksum += carry; + stq_u(partial_dest | second_dest, dst); + src++; + checksum += word; + insqh(word, doff, partial_dest); + carry = checksum < word; + dst++; + } + len += 8; + if (len) { + checksum += carry; + if (__get_word(ldq, word, src)) + return 0; + mskql(word, len, word); + len -= 8; + checksum += word; + insql(word, doff, second_dest); + len += doff; + carry = checksum < word; + partial_dest |= second_dest; + if (len >= 0) { + stq_u(partial_dest, dst); + if (!len) goto out; + dst++; + insqh(word, doff, partial_dest); + } + doff = len; + } + ldq_u(second_dest, dst); + mskqh(second_dest, doff, second_dest); + stq_u(partial_dest | second_dest, dst); +out: + checksum += carry; + return checksum; +} + +/* + * This is so totally un-fun that it's frightening. Don't + * look at this too closely, you'll go blind. + */ +static inline unsigned long +csum_partial_cfu_unaligned(const unsigned long __user * src, + unsigned long * dst, + unsigned long soff, unsigned long doff, + long len, unsigned long partial_dest) +{ + unsigned long carry = 0; + unsigned long first; + unsigned long lastsrc; + unsigned long checksum = ~0U; + + if (__get_word(ldq_u, first, src)) + return 0; + lastsrc = 7+len+(unsigned long)src; + mskql(partial_dest, doff, partial_dest); + while (len >= 0) { + unsigned long second, word; + unsigned long second_dest; + + if (__get_word(ldq_u, second, src+1)) + return 0; + extql(first, soff, word); + checksum += carry; + len -= 8; + extqh(second, soff, first); + src++; + word |= first; + first = second; + insql(word, doff, second_dest); + checksum += word; + stq_u(partial_dest | second_dest, dst); + carry = checksum < word; + insqh(word, doff, partial_dest); + dst++; + } + len += doff; + checksum += carry; + if (len >= 0) { + unsigned long second, word; + unsigned long second_dest; + + if (__get_word(ldq_u, second, lastsrc)) + return 0; + extql(first, soff, word); + extqh(second, soff, first); + word |= first; + first = second; + mskql(word, len-doff, word); + checksum += word; + insql(word, doff, second_dest); + carry = checksum < word; + stq_u(partial_dest | second_dest, dst); + if (len) { + ldq_u(second_dest, dst+1); + insqh(word, doff, partial_dest); + mskqh(second_dest, len, second_dest); + stq_u(partial_dest | second_dest, dst+1); + } + checksum += carry; + } else { + unsigned long second, word; + unsigned long second_dest; + + if (__get_word(ldq_u, second, lastsrc)) + return 0; + extql(first, soff, word); + extqh(second, soff, first); + word |= first; + ldq_u(second_dest, dst); + mskql(word, len-doff, word); + checksum += word; + mskqh(second_dest, len, second_dest); + carry = checksum < word; + insql(word, doff, word); + stq_u(partial_dest | word | second_dest, dst); + checksum += carry; + } + return checksum; +} + +static __wsum __csum_and_copy(const void __user *src, void *dst, int len) +{ + unsigned long soff = 7 & (unsigned long) src; + unsigned long doff = 7 & (unsigned long) dst; + unsigned long checksum; + + if (!doff) { + if (!soff) + checksum = csum_partial_cfu_aligned( + (const unsigned long __user *) src, + (unsigned long *) dst, len-8); + else + checksum = csum_partial_cfu_dest_aligned( + (const unsigned long __user *) src, + (unsigned long *) dst, + soff, len-8); + } else { + unsigned long partial_dest; + ldq_u(partial_dest, dst); + if (!soff) + checksum = csum_partial_cfu_src_aligned( + (const unsigned long __user *) src, + (unsigned long *) dst, + doff, len-8, partial_dest); + else + checksum = csum_partial_cfu_unaligned( + (const unsigned long __user *) src, + (unsigned long *) dst, + soff, doff, len-8, partial_dest); + } + return (__force __wsum)from64to16 (checksum); +} + +__wsum +csum_and_copy_from_user(const void __user *src, void *dst, int len) +{ + if (!access_ok(src, len)) + return 0; + return __csum_and_copy(src, dst, len); +} + +__wsum +csum_partial_copy_nocheck(const void *src, void *dst, int len) +{ + return __csum_and_copy((__force const void __user *)src, + dst, len); +} +EXPORT_SYMBOL(csum_partial_copy_nocheck); -- cgit v1.2.3