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(). ... --- .../broadcom/brcm80211/brcmsmac/phy/phy_qmath.c | 298 +++++++++++++++++++++ 1 file changed, 298 insertions(+) create mode 100644 drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c (limited to 'drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c') diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c new file mode 100644 index 000000000..45dcd277a --- /dev/null +++ b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_qmath.c @@ -0,0 +1,298 @@ +// SPDX-License-Identifier: ISC +/* + * Copyright (c) 2010 Broadcom Corporation + */ + +#include "phy_qmath.h" + +/* + * Description: This function make 16 bit unsigned multiplication. + * To fit the output into 16 bits the 32 bit multiplication result is right + * shifted by 16 bits. + */ +u16 qm_mulu16(u16 op1, u16 op2) +{ + return (u16) (((u32) op1 * (u32) op2) >> 16); +} + +/* + * Description: This function make 16 bit multiplication and return the result + * in 16 bits. To fit the multiplication result into 16 bits the multiplication + * result is right shifted by 15 bits. Right shifting 15 bits instead of 16 bits + * is done to remove the extra sign bit formed due to the multiplication. + * When both the 16bit inputs are 0x8000 then the output is saturated to + * 0x7fffffff. + */ +s16 qm_muls16(s16 op1, s16 op2) +{ + s32 result; + if (op1 == (s16) 0x8000 && op2 == (s16) 0x8000) + result = 0x7fffffff; + else + result = ((s32) (op1) * (s32) (op2)); + + return (s16) (result >> 15); +} + +/* + * Description: This function add two 32 bit numbers and return the 32bit + * result. If the result overflow 32 bits, the output will be saturated to + * 32bits. + */ +s32 qm_add32(s32 op1, s32 op2) +{ + s32 result; + result = op1 + op2; + if (op1 < 0 && op2 < 0 && result > 0) + result = 0x80000000; + else if (op1 > 0 && op2 > 0 && result < 0) + result = 0x7fffffff; + + return result; +} + +/* + * Description: This function add two 16 bit numbers and return the 16bit + * result. If the result overflow 16 bits, the output will be saturated to + * 16bits. + */ +s16 qm_add16(s16 op1, s16 op2) +{ + s16 result; + s32 temp = (s32) op1 + (s32) op2; + if (temp > (s32) 0x7fff) + result = (s16) 0x7fff; + else if (temp < (s32) 0xffff8000) + result = (s16) 0xffff8000; + else + result = (s16) temp; + + return result; +} + +/* + * Description: This function make 16 bit subtraction and return the 16bit + * result. If the result overflow 16 bits, the output will be saturated to + * 16bits. + */ +s16 qm_sub16(s16 op1, s16 op2) +{ + s16 result; + s32 temp = (s32) op1 - (s32) op2; + if (temp > (s32) 0x7fff) + result = (s16) 0x7fff; + else if (temp < (s32) 0xffff8000) + result = (s16) 0xffff8000; + else + result = (s16) temp; + + return result; +} + +/* + * Description: This function make a 32 bit saturated left shift when the + * specified shift is +ve. This function will make a 32 bit right shift when + * the specified shift is -ve. This function return the result after shifting + * operation. + */ +s32 qm_shl32(s32 op, int shift) +{ + int i; + s32 result; + result = op; + if (shift > 31) + shift = 31; + else if (shift < -31) + shift = -31; + if (shift >= 0) { + for (i = 0; i < shift; i++) + result = qm_add32(result, result); + } else { + result = result >> (-shift); + } + + return result; +} + +/* + * Description: This function make a 16 bit saturated left shift when the + * specified shift is +ve. This function will make a 16 bit right shift when + * the specified shift is -ve. This function return the result after shifting + * operation. + */ +s16 qm_shl16(s16 op, int shift) +{ + int i; + s16 result; + result = op; + if (shift > 15) + shift = 15; + else if (shift < -15) + shift = -15; + if (shift > 0) { + for (i = 0; i < shift; i++) + result = qm_add16(result, result); + } else { + result = result >> (-shift); + } + + return result; +} + +/* + * Description: This function make a 16 bit right shift when shift is +ve. + * This function make a 16 bit saturated left shift when shift is -ve. This + * function return the result of the shift operation. + */ +s16 qm_shr16(s16 op, int shift) +{ + return qm_shl16(op, -shift); +} + +/* + * Description: This function return the number of redundant sign bits in a + * 32 bit number. Example: qm_norm32(0x00000080) = 23 + */ +s16 qm_norm32(s32 op) +{ + u16 u16extraSignBits; + if (op == 0) { + return 31; + } else { + u16extraSignBits = 0; + while ((op >> 31) == (op >> 30)) { + u16extraSignBits++; + op = op << 1; + } + } + return u16extraSignBits; +} + +/* This table is log2(1+(i/32)) where i=[0:1:32], in q.15 format */ +static const s16 log_table[] = { + 0, + 1455, + 2866, + 4236, + 5568, + 6863, + 8124, + 9352, + 10549, + 11716, + 12855, + 13968, + 15055, + 16117, + 17156, + 18173, + 19168, + 20143, + 21098, + 22034, + 22952, + 23852, + 24736, + 25604, + 26455, + 27292, + 28114, + 28922, + 29717, + 30498, + 31267, + 32024, + 32767 +}; + +#define LOG_TABLE_SIZE 32 /* log_table size */ +#define LOG2_LOG_TABLE_SIZE 5 /* log2(log_table size) */ +#define Q_LOG_TABLE 15 /* qformat of log_table */ +#define LOG10_2 19728 /* log10(2) in q.16 */ + +/* + * Description: + * This routine takes the input number N and its q format qN and compute + * the log10(N). This routine first normalizes the input no N. Then N is in + * mag*(2^x) format. mag is any number in the range 2^30-(2^31 - 1). + * Then log2(mag * 2^x) = log2(mag) + x is computed. From that + * log10(mag * 2^x) = log2(mag * 2^x) * log10(2) is computed. + * This routine looks the log2 value in the table considering + * LOG2_LOG_TABLE_SIZE+1 MSBs. As the MSB is always 1, only next + * LOG2_OF_LOG_TABLE_SIZE MSBs are used for table lookup. Next 16 MSBs are used + * for interpolation. + * Inputs: + * N - number to which log10 has to be found. + * qN - q format of N + * log10N - address where log10(N) will be written. + * qLog10N - address where log10N qformat will be written. + * Note/Problem: + * For accurate results input should be in normalized or near normalized form. + */ +void qm_log10(s32 N, s16 qN, s16 *log10N, s16 *qLog10N) +{ + s16 s16norm, s16tableIndex, s16errorApproximation; + u16 u16offset; + s32 s32log; + + /* normalize the N. */ + s16norm = qm_norm32(N); + N = N << s16norm; + + /* The qformat of N after normalization. + * -30 is added to treat the no as between 1.0 to 2.0 + * i.e. after adding the -30 to the qformat the decimal point will be + * just rigtht of the MSB. (i.e. after sign bit and 1st MSB). i.e. + * at the right side of 30th bit. + */ + qN = qN + s16norm - 30; + + /* take the table index as the LOG2_OF_LOG_TABLE_SIZE bits right of the + * MSB */ + s16tableIndex = (s16) (N >> (32 - (2 + LOG2_LOG_TABLE_SIZE))); + + /* remove the MSB. the MSB is always 1 after normalization. */ + s16tableIndex = + s16tableIndex & (s16) ((1 << LOG2_LOG_TABLE_SIZE) - 1); + + /* remove the (1+LOG2_OF_LOG_TABLE_SIZE) MSBs in the N. */ + N = N & ((1 << (32 - (2 + LOG2_LOG_TABLE_SIZE))) - 1); + + /* take the offset as the 16 MSBS after table index. + */ + u16offset = (u16) (N >> (32 - (2 + LOG2_LOG_TABLE_SIZE + 16))); + + /* look the log value in the table. */ + s32log = log_table[s16tableIndex]; /* q.15 format */ + + /* interpolate using the offset. q.15 format. */ + s16errorApproximation = (s16) qm_mulu16(u16offset, + (u16) (log_table[s16tableIndex + 1] - + log_table[s16tableIndex])); + + /* q.15 format */ + s32log = qm_add16((s16) s32log, s16errorApproximation); + + /* adjust for the qformat of the N as + * log2(mag * 2^x) = log2(mag) + x + */ + s32log = qm_add32(s32log, ((s32) -qN) << 15); /* q.15 format */ + + /* normalize the result. */ + s16norm = qm_norm32(s32log); + + /* bring all the important bits into lower 16 bits */ + /* q.15+s16norm-16 format */ + s32log = qm_shl32(s32log, s16norm - 16); + + /* compute the log10(N) by multiplying log2(N) with log10(2). + * as log10(mag * 2^x) = log2(mag * 2^x) * log10(2) + * log10N in q.15+s16norm-16+1 (LOG10_2 is in q.16) + */ + *log10N = qm_muls16((s16) s32log, (s16) LOG10_2); + + /* write the q format of the result. */ + *qLog10N = 15 + s16norm - 16 + 1; + + return; +} -- cgit v1.2.3