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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/include/asm/bitops.h | |
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/include/asm/bitops.h')
-rw-r--r-- | arch/ia64/include/asm/bitops.h | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/bitops.h b/arch/ia64/include/asm/bitops.h new file mode 100644 index 000000000..1accb7842 --- /dev/null +++ b/arch/ia64/include/asm/bitops.h @@ -0,0 +1,453 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_IA64_BITOPS_H +#define _ASM_IA64_BITOPS_H + +/* + * Copyright (C) 1998-2003 Hewlett-Packard Co + * David Mosberger-Tang <davidm@hpl.hp.com> + * + * 02/06/02 find_next_bit() and find_first_bit() added from Erich Focht's ia64 + * O(1) scheduler patch + */ + +#ifndef _LINUX_BITOPS_H +#error only <linux/bitops.h> can be included directly +#endif + +#include <linux/compiler.h> +#include <linux/types.h> +#include <asm/intrinsics.h> +#include <asm/barrier.h> + +/** + * set_bit - Atomically set a bit in memory + * @nr: the bit to set + * @addr: the address to start counting from + * + * This function is atomic and may not be reordered. See __set_bit() + * if you do not require the atomic guarantees. + * Note that @nr may be almost arbitrarily large; this function is not + * restricted to acting on a single-word quantity. + * + * The address must be (at least) "long" aligned. + * Note that there are driver (e.g., eepro100) which use these operations to + * operate on hw-defined data-structures, so we can't easily change these + * operations to force a bigger alignment. + * + * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1). + */ +static __inline__ void +set_bit (int nr, volatile void *addr) +{ + __u32 bit, old, new; + volatile __u32 *m; + CMPXCHG_BUGCHECK_DECL + + m = (volatile __u32 *) addr + (nr >> 5); + bit = 1 << (nr & 31); + do { + CMPXCHG_BUGCHECK(m); + old = *m; + new = old | bit; + } while (cmpxchg_acq(m, old, new) != old); +} + +/** + * arch___set_bit - Set a bit in memory + * @nr: the bit to set + * @addr: the address to start counting from + * + * Unlike set_bit(), this function is non-atomic and may be reordered. + * If it's called on the same region of memory simultaneously, the effect + * may be that only one operation succeeds. + */ +static __always_inline void +arch___set_bit(unsigned long nr, volatile unsigned long *addr) +{ + *((__u32 *) addr + (nr >> 5)) |= (1 << (nr & 31)); +} + +/** + * clear_bit - Clears a bit in memory + * @nr: Bit to clear + * @addr: Address to start counting from + * + * clear_bit() is atomic and may not be reordered. However, it does + * not contain a memory barrier, so if it is used for locking purposes, + * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic() + * in order to ensure changes are visible on other processors. + */ +static __inline__ void +clear_bit (int nr, volatile void *addr) +{ + __u32 mask, old, new; + volatile __u32 *m; + CMPXCHG_BUGCHECK_DECL + + m = (volatile __u32 *) addr + (nr >> 5); + mask = ~(1 << (nr & 31)); + do { + CMPXCHG_BUGCHECK(m); + old = *m; + new = old & mask; + } while (cmpxchg_acq(m, old, new) != old); +} + +/** + * clear_bit_unlock - Clears a bit in memory with release + * @nr: Bit to clear + * @addr: Address to start counting from + * + * clear_bit_unlock() is atomic and may not be reordered. It does + * contain a memory barrier suitable for unlock type operations. + */ +static __inline__ void +clear_bit_unlock (int nr, volatile void *addr) +{ + __u32 mask, old, new; + volatile __u32 *m; + CMPXCHG_BUGCHECK_DECL + + m = (volatile __u32 *) addr + (nr >> 5); + mask = ~(1 << (nr & 31)); + do { + CMPXCHG_BUGCHECK(m); + old = *m; + new = old & mask; + } while (cmpxchg_rel(m, old, new) != old); +} + +/** + * __clear_bit_unlock - Non-atomically clears a bit in memory with release + * @nr: Bit to clear + * @addr: Address to start counting from + * + * Similarly to clear_bit_unlock, the implementation uses a store + * with release semantics. See also arch_spin_unlock(). + */ +static __inline__ void +__clear_bit_unlock(int nr, void *addr) +{ + __u32 * const m = (__u32 *) addr + (nr >> 5); + __u32 const new = *m & ~(1 << (nr & 31)); + + ia64_st4_rel_nta(m, new); +} + +/** + * arch___clear_bit - Clears a bit in memory (non-atomic version) + * @nr: the bit to clear + * @addr: the address to start counting from + * + * Unlike clear_bit(), this function is non-atomic and may be reordered. + * If it's called on the same region of memory simultaneously, the effect + * may be that only one operation succeeds. + */ +static __always_inline void +arch___clear_bit(unsigned long nr, volatile unsigned long *addr) +{ + *((__u32 *) addr + (nr >> 5)) &= ~(1 << (nr & 31)); +} + +/** + * change_bit - Toggle a bit in memory + * @nr: Bit to toggle + * @addr: Address to start counting from + * + * change_bit() is atomic and may not be reordered. + * Note that @nr may be almost arbitrarily large; this function is not + * restricted to acting on a single-word quantity. + */ +static __inline__ void +change_bit (int nr, volatile void *addr) +{ + __u32 bit, old, new; + volatile __u32 *m; + CMPXCHG_BUGCHECK_DECL + + m = (volatile __u32 *) addr + (nr >> 5); + bit = (1 << (nr & 31)); + do { + CMPXCHG_BUGCHECK(m); + old = *m; + new = old ^ bit; + } while (cmpxchg_acq(m, old, new) != old); +} + +/** + * arch___change_bit - Toggle a bit in memory + * @nr: the bit to toggle + * @addr: the address to start counting from + * + * Unlike change_bit(), this function is non-atomic and may be reordered. + * If it's called on the same region of memory simultaneously, the effect + * may be that only one operation succeeds. + */ +static __always_inline void +arch___change_bit(unsigned long nr, volatile unsigned long *addr) +{ + *((__u32 *) addr + (nr >> 5)) ^= (1 << (nr & 31)); +} + +/** + * test_and_set_bit - Set a bit and return its old value + * @nr: Bit to set + * @addr: Address to count from + * + * This operation is atomic and cannot be reordered. + * It also implies the acquisition side of the memory barrier. + */ +static __inline__ int +test_and_set_bit (int nr, volatile void *addr) +{ + __u32 bit, old, new; + volatile __u32 *m; + CMPXCHG_BUGCHECK_DECL + + m = (volatile __u32 *) addr + (nr >> 5); + bit = 1 << (nr & 31); + do { + CMPXCHG_BUGCHECK(m); + old = *m; + new = old | bit; + } while (cmpxchg_acq(m, old, new) != old); + return (old & bit) != 0; +} + +/** + * test_and_set_bit_lock - Set a bit and return its old value for lock + * @nr: Bit to set + * @addr: Address to count from + * + * This is the same as test_and_set_bit on ia64 + */ +#define test_and_set_bit_lock test_and_set_bit + +/** + * arch___test_and_set_bit - Set a bit and return its old value + * @nr: Bit to set + * @addr: Address to count from + * + * This operation is non-atomic and can be reordered. + * If two examples of this operation race, one can appear to succeed + * but actually fail. You must protect multiple accesses with a lock. + */ +static __always_inline bool +arch___test_and_set_bit(unsigned long nr, volatile unsigned long *addr) +{ + __u32 *p = (__u32 *) addr + (nr >> 5); + __u32 m = 1 << (nr & 31); + int oldbitset = (*p & m) != 0; + + *p |= m; + return oldbitset; +} + +/** + * test_and_clear_bit - Clear a bit and return its old value + * @nr: Bit to clear + * @addr: Address to count from + * + * This operation is atomic and cannot be reordered. + * It also implies the acquisition side of the memory barrier. + */ +static __inline__ int +test_and_clear_bit (int nr, volatile void *addr) +{ + __u32 mask, old, new; + volatile __u32 *m; + CMPXCHG_BUGCHECK_DECL + + m = (volatile __u32 *) addr + (nr >> 5); + mask = ~(1 << (nr & 31)); + do { + CMPXCHG_BUGCHECK(m); + old = *m; + new = old & mask; + } while (cmpxchg_acq(m, old, new) != old); + return (old & ~mask) != 0; +} + +/** + * arch___test_and_clear_bit - Clear a bit and return its old value + * @nr: Bit to clear + * @addr: Address to count from + * + * This operation is non-atomic and can be reordered. + * If two examples of this operation race, one can appear to succeed + * but actually fail. You must protect multiple accesses with a lock. + */ +static __always_inline bool +arch___test_and_clear_bit(unsigned long nr, volatile unsigned long *addr) +{ + __u32 *p = (__u32 *) addr + (nr >> 5); + __u32 m = 1 << (nr & 31); + int oldbitset = (*p & m) != 0; + + *p &= ~m; + return oldbitset; +} + +/** + * test_and_change_bit - Change a bit and return its old value + * @nr: Bit to change + * @addr: Address to count from + * + * This operation is atomic and cannot be reordered. + * It also implies the acquisition side of the memory barrier. + */ +static __inline__ int +test_and_change_bit (int nr, volatile void *addr) +{ + __u32 bit, old, new; + volatile __u32 *m; + CMPXCHG_BUGCHECK_DECL + + m = (volatile __u32 *) addr + (nr >> 5); + bit = (1 << (nr & 31)); + do { + CMPXCHG_BUGCHECK(m); + old = *m; + new = old ^ bit; + } while (cmpxchg_acq(m, old, new) != old); + return (old & bit) != 0; +} + +/** + * arch___test_and_change_bit - Change a bit and return its old value + * @nr: Bit to change + * @addr: Address to count from + * + * This operation is non-atomic and can be reordered. + */ +static __always_inline bool +arch___test_and_change_bit(unsigned long nr, volatile unsigned long *addr) +{ + __u32 old, bit = (1 << (nr & 31)); + __u32 *m = (__u32 *) addr + (nr >> 5); + + old = *m; + *m = old ^ bit; + return (old & bit) != 0; +} + +#define arch_test_bit generic_test_bit +#define arch_test_bit_acquire generic_test_bit_acquire + +/** + * ffz - find the first zero bit in a long word + * @x: The long word to find the bit in + * + * Returns the bit-number (0..63) of the first (least significant) zero bit. + * Undefined if no zero exists, so code should check against ~0UL first... + */ +static inline unsigned long +ffz (unsigned long x) +{ + unsigned long result; + + result = ia64_popcnt(x & (~x - 1)); + return result; +} + +/** + * __ffs - find first bit in word. + * @x: The word to search + * + * Undefined if no bit exists, so code should check against 0 first. + */ +static __inline__ unsigned long +__ffs (unsigned long x) +{ + unsigned long result; + + result = ia64_popcnt((x-1) & ~x); + return result; +} + +#ifdef __KERNEL__ + +/* + * Return bit number of last (most-significant) bit set. Undefined + * for x==0. Bits are numbered from 0..63 (e.g., ia64_fls(9) == 3). + */ +static inline unsigned long +ia64_fls (unsigned long x) +{ + long double d = x; + long exp; + + exp = ia64_getf_exp(d); + return exp - 0xffff; +} + +/* + * Find the last (most significant) bit set. Returns 0 for x==0 and + * bits are numbered from 1..32 (e.g., fls(9) == 4). + */ +static inline int fls(unsigned int t) +{ + unsigned long x = t & 0xffffffffu; + + if (!x) + return 0; + x |= x >> 1; + x |= x >> 2; + x |= x >> 4; + x |= x >> 8; + x |= x >> 16; + return ia64_popcnt(x); +} + +/* + * Find the last (most significant) bit set. Undefined for x==0. + * Bits are numbered from 0..63 (e.g., __fls(9) == 3). + */ +static inline unsigned long +__fls (unsigned long x) +{ + x |= x >> 1; + x |= x >> 2; + x |= x >> 4; + x |= x >> 8; + x |= x >> 16; + x |= x >> 32; + return ia64_popcnt(x) - 1; +} + +#include <asm-generic/bitops/fls64.h> + +#include <asm-generic/bitops/builtin-ffs.h> + +/* + * hweightN: returns the hamming weight (i.e. the number + * of bits set) of a N-bit word + */ +static __inline__ unsigned long __arch_hweight64(unsigned long x) +{ + unsigned long result; + result = ia64_popcnt(x); + return result; +} + +#define __arch_hweight32(x) ((unsigned int) __arch_hweight64((x) & 0xfffffffful)) +#define __arch_hweight16(x) ((unsigned int) __arch_hweight64((x) & 0xfffful)) +#define __arch_hweight8(x) ((unsigned int) __arch_hweight64((x) & 0xfful)) + +#include <asm-generic/bitops/const_hweight.h> + +#endif /* __KERNEL__ */ + +#ifdef __KERNEL__ + +#include <asm-generic/bitops/non-instrumented-non-atomic.h> + +#include <asm-generic/bitops/le.h> + +#include <asm-generic/bitops/ext2-atomic-setbit.h> + +#include <asm-generic/bitops/sched.h> + +#endif /* __KERNEL__ */ + +#endif /* _ASM_IA64_BITOPS_H */ |