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author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /arch/ia64/lib/copy_page_mck.S | |
download | linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip |
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
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().
...
Diffstat (limited to 'arch/ia64/lib/copy_page_mck.S')
-rw-r--r-- | arch/ia64/lib/copy_page_mck.S | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/arch/ia64/lib/copy_page_mck.S b/arch/ia64/lib/copy_page_mck.S new file mode 100644 index 000000000..d6fd56e4f --- /dev/null +++ b/arch/ia64/lib/copy_page_mck.S @@ -0,0 +1,188 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * McKinley-optimized version of copy_page(). + * + * Copyright (C) 2002 Hewlett-Packard Co + * David Mosberger <davidm@hpl.hp.com> + * + * Inputs: + * in0: address of target page + * in1: address of source page + * Output: + * no return value + * + * General idea: + * - use regular loads and stores to prefetch data to avoid consuming M-slot just for + * lfetches => good for in-cache performance + * - avoid l2 bank-conflicts by not storing into the same 16-byte bank within a single + * cycle + * + * Principle of operation: + * First, note that L1 has a line-size of 64 bytes and L2 a line-size of 128 bytes. + * To avoid secondary misses in L2, we prefetch both source and destination with a line-size + * of 128 bytes. When both of these lines are in the L2 and the first half of the + * source line is in L1, we start copying the remaining words. The second half of the + * source line is prefetched in an earlier iteration, so that by the time we start + * accessing it, it's also present in the L1. + * + * We use a software-pipelined loop to control the overall operation. The pipeline + * has 2*PREFETCH_DIST+K stages. The first PREFETCH_DIST stages are used for prefetching + * source cache-lines. The second PREFETCH_DIST stages are used for prefetching destination + * cache-lines, the last K stages are used to copy the cache-line words not copied by + * the prefetches. The four relevant points in the pipelined are called A, B, C, D: + * p[A] is TRUE if a source-line should be prefetched, p[B] is TRUE if a destination-line + * should be prefetched, p[C] is TRUE if the second half of an L2 line should be brought + * into L1D and p[D] is TRUE if a cacheline needs to be copied. + * + * This all sounds very complicated, but thanks to the modulo-scheduled loop support, + * the resulting code is very regular and quite easy to follow (once you get the idea). + * + * As a secondary optimization, the first 2*PREFETCH_DIST iterations are implemented + * as the separate .prefetch_loop. Logically, this loop performs exactly like the + * main-loop (.line_copy), but has all known-to-be-predicated-off instructions removed, + * so that each loop iteration is faster (again, good for cached case). + * + * When reading the code, it helps to keep the following picture in mind: + * + * word 0 word 1 + * +------+------+--- + * | v[x] | t1 | ^ + * | t2 | t3 | | + * | t4 | t5 | | + * | t6 | t7 | | 128 bytes + * | n[y] | t9 | | (L2 cache line) + * | t10 | t11 | | + * | t12 | t13 | | + * | t14 | t15 | v + * +------+------+--- + * + * Here, v[x] is copied by the (memory) prefetch. n[y] is loaded at p[C] + * to fetch the second-half of the L2 cache line into L1, and the tX words are copied in + * an order that avoids bank conflicts. + */ +#include <asm/asmmacro.h> +#include <asm/page.h> +#include <asm/export.h> + +#define PREFETCH_DIST 8 // McKinley sustains 16 outstanding L2 misses (8 ld, 8 st) + +#define src0 r2 +#define src1 r3 +#define dst0 r9 +#define dst1 r10 +#define src_pre_mem r11 +#define dst_pre_mem r14 +#define src_pre_l2 r15 +#define dst_pre_l2 r16 +#define t1 r17 +#define t2 r18 +#define t3 r19 +#define t4 r20 +#define t5 t1 // alias! +#define t6 t2 // alias! +#define t7 t3 // alias! +#define t9 t5 // alias! +#define t10 t4 // alias! +#define t11 t7 // alias! +#define t12 t6 // alias! +#define t14 t10 // alias! +#define t13 r21 +#define t15 r22 + +#define saved_lc r23 +#define saved_pr r24 + +#define A 0 +#define B (PREFETCH_DIST) +#define C (B + PREFETCH_DIST) +#define D (C + 3) +#define N (D + 1) +#define Nrot ((N + 7) & ~7) + +GLOBAL_ENTRY(copy_page) + .prologue + alloc r8 = ar.pfs, 2, Nrot-2, 0, Nrot + + .rotr v[2*PREFETCH_DIST], n[D-C+1] + .rotp p[N] + + .save ar.lc, saved_lc + mov saved_lc = ar.lc + .save pr, saved_pr + mov saved_pr = pr + .body + + mov src_pre_mem = in1 + mov pr.rot = 0x10000 + mov ar.ec = 1 // special unrolled loop + + mov dst_pre_mem = in0 + mov ar.lc = 2*PREFETCH_DIST - 1 + + add src_pre_l2 = 8*8, in1 + add dst_pre_l2 = 8*8, in0 + add src0 = 8, in1 // first t1 src + add src1 = 3*8, in1 // first t3 src + add dst0 = 8, in0 // first t1 dst + add dst1 = 3*8, in0 // first t3 dst + mov t1 = (PAGE_SIZE/128) - (2*PREFETCH_DIST) - 1 + nop.m 0 + nop.i 0 + ;; + // same as .line_copy loop, but with all predicated-off instructions removed: +.prefetch_loop: +(p[A]) ld8 v[A] = [src_pre_mem], 128 // M0 +(p[B]) st8 [dst_pre_mem] = v[B], 128 // M2 + br.ctop.sptk .prefetch_loop + ;; + cmp.eq p16, p0 = r0, r0 // reset p16 to 1 (br.ctop cleared it to zero) + mov ar.lc = t1 // with 64KB pages, t1 is too big to fit in 8 bits! + mov ar.ec = N // # of stages in pipeline + ;; +.line_copy: +(p[D]) ld8 t2 = [src0], 3*8 // M0 +(p[D]) ld8 t4 = [src1], 3*8 // M1 +(p[B]) st8 [dst_pre_mem] = v[B], 128 // M2 prefetch dst from memory +(p[D]) st8 [dst_pre_l2] = n[D-C], 128 // M3 prefetch dst from L2 + ;; +(p[A]) ld8 v[A] = [src_pre_mem], 128 // M0 prefetch src from memory +(p[C]) ld8 n[0] = [src_pre_l2], 128 // M1 prefetch src from L2 +(p[D]) st8 [dst0] = t1, 8 // M2 +(p[D]) st8 [dst1] = t3, 8 // M3 + ;; +(p[D]) ld8 t5 = [src0], 8 +(p[D]) ld8 t7 = [src1], 3*8 +(p[D]) st8 [dst0] = t2, 3*8 +(p[D]) st8 [dst1] = t4, 3*8 + ;; +(p[D]) ld8 t6 = [src0], 3*8 +(p[D]) ld8 t10 = [src1], 8 +(p[D]) st8 [dst0] = t5, 8 +(p[D]) st8 [dst1] = t7, 3*8 + ;; +(p[D]) ld8 t9 = [src0], 3*8 +(p[D]) ld8 t11 = [src1], 3*8 +(p[D]) st8 [dst0] = t6, 3*8 +(p[D]) st8 [dst1] = t10, 8 + ;; +(p[D]) ld8 t12 = [src0], 8 +(p[D]) ld8 t14 = [src1], 8 +(p[D]) st8 [dst0] = t9, 3*8 +(p[D]) st8 [dst1] = t11, 3*8 + ;; +(p[D]) ld8 t13 = [src0], 4*8 +(p[D]) ld8 t15 = [src1], 4*8 +(p[D]) st8 [dst0] = t12, 8 +(p[D]) st8 [dst1] = t14, 8 + ;; +(p[D-1])ld8 t1 = [src0], 8 +(p[D-1])ld8 t3 = [src1], 8 +(p[D]) st8 [dst0] = t13, 4*8 +(p[D]) st8 [dst1] = t15, 4*8 + br.ctop.sptk .line_copy + ;; + mov ar.lc = saved_lc + mov pr = saved_pr, -1 + br.ret.sptk.many rp +END(copy_page) +EXPORT_SYMBOL(copy_page) |