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(). ... --- sound/usb/line6/midibuf.c | 257 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 257 insertions(+) create mode 100644 sound/usb/line6/midibuf.c (limited to 'sound/usb/line6/midibuf.c') diff --git a/sound/usb/line6/midibuf.c b/sound/usb/line6/midibuf.c new file mode 100644 index 000000000..e7f830f75 --- /dev/null +++ b/sound/usb/line6/midibuf.c @@ -0,0 +1,257 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Line 6 Linux USB driver + * + * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) + */ + +#include + +#include "midibuf.h" + + +static int midibuf_message_length(unsigned char code) +{ + int message_length; + + if (code < 0x80) + message_length = -1; + else if (code < 0xf0) { + static const int length[] = { 3, 3, 3, 3, 2, 2, 3 }; + + message_length = length[(code >> 4) - 8]; + } else { + static const int length[] = { -1, 2, 2, 2, -1, -1, 1, 1, 1, -1, + 1, 1, 1, -1, 1, 1 + }; + message_length = length[code & 0x0f]; + } + + return message_length; +} + +static int midibuf_is_empty(struct midi_buffer *this) +{ + return (this->pos_read == this->pos_write) && !this->full; +} + +static int midibuf_is_full(struct midi_buffer *this) +{ + return this->full; +} + +void line6_midibuf_reset(struct midi_buffer *this) +{ + this->pos_read = this->pos_write = this->full = 0; + this->command_prev = -1; +} + +int line6_midibuf_init(struct midi_buffer *this, int size, int split) +{ + this->buf = kmalloc(size, GFP_KERNEL); + + if (this->buf == NULL) + return -ENOMEM; + + this->size = size; + this->split = split; + line6_midibuf_reset(this); + return 0; +} + +int line6_midibuf_bytes_free(struct midi_buffer *this) +{ + return + midibuf_is_full(this) ? + 0 : + (this->pos_read - this->pos_write + this->size - 1) % this->size + + 1; +} + +int line6_midibuf_bytes_used(struct midi_buffer *this) +{ + return + midibuf_is_empty(this) ? + 0 : + (this->pos_write - this->pos_read + this->size - 1) % this->size + + 1; +} + +int line6_midibuf_write(struct midi_buffer *this, unsigned char *data, + int length) +{ + int bytes_free; + int length1, length2; + int skip_active_sense = 0; + + if (midibuf_is_full(this) || (length <= 0)) + return 0; + + /* skip trailing active sense */ + if (data[length - 1] == 0xfe) { + --length; + skip_active_sense = 1; + } + + bytes_free = line6_midibuf_bytes_free(this); + + if (length > bytes_free) + length = bytes_free; + + if (length > 0) { + length1 = this->size - this->pos_write; + + if (length < length1) { + /* no buffer wraparound */ + memcpy(this->buf + this->pos_write, data, length); + this->pos_write += length; + } else { + /* buffer wraparound */ + length2 = length - length1; + memcpy(this->buf + this->pos_write, data, length1); + memcpy(this->buf, data + length1, length2); + this->pos_write = length2; + } + + if (this->pos_write == this->pos_read) + this->full = 1; + } + + return length + skip_active_sense; +} + +int line6_midibuf_read(struct midi_buffer *this, unsigned char *data, + int length, int read_type) +{ + int bytes_used; + int length1, length2; + int command; + int midi_length; + int repeat = 0; + int i; + + /* we need to be able to store at least a 3 byte MIDI message */ + if (length < 3) + return -EINVAL; + + if (midibuf_is_empty(this)) + return 0; + + bytes_used = line6_midibuf_bytes_used(this); + + if (length > bytes_used) + length = bytes_used; + + length1 = this->size - this->pos_read; + + command = this->buf[this->pos_read]; + /* + PODxt always has status byte lower nibble set to 0010, + when it means to send 0000, so we correct if here so + that control/program changes come on channel 1 and + sysex message status byte is correct + */ + if (read_type == LINE6_MIDIBUF_READ_RX) { + if (command == 0xb2 || command == 0xc2 || command == 0xf2) { + unsigned char fixed = command & 0xf0; + this->buf[this->pos_read] = fixed; + command = fixed; + } + } + + /* check MIDI command length */ + if (command & 0x80) { + midi_length = midibuf_message_length(command); + this->command_prev = command; + } else { + if (this->command_prev > 0) { + int midi_length_prev = + midibuf_message_length(this->command_prev); + + if (midi_length_prev > 1) { + midi_length = midi_length_prev - 1; + repeat = 1; + } else + midi_length = -1; + } else + midi_length = -1; + } + + if (midi_length < 0) { + /* search for end of message */ + if (length < length1) { + /* no buffer wraparound */ + for (i = 1; i < length; ++i) + if (this->buf[this->pos_read + i] & 0x80) + break; + + midi_length = i; + } else { + /* buffer wraparound */ + length2 = length - length1; + + for (i = 1; i < length1; ++i) + if (this->buf[this->pos_read + i] & 0x80) + break; + + if (i < length1) + midi_length = i; + else { + for (i = 0; i < length2; ++i) + if (this->buf[i] & 0x80) + break; + + midi_length = length1 + i; + } + } + + if (midi_length == length) + midi_length = -1; /* end of message not found */ + } + + if (midi_length < 0) { + if (!this->split) + return 0; /* command is not yet complete */ + } else { + if (length < midi_length) + return 0; /* command is not yet complete */ + + length = midi_length; + } + + if (length < length1) { + /* no buffer wraparound */ + memcpy(data + repeat, this->buf + this->pos_read, length); + this->pos_read += length; + } else { + /* buffer wraparound */ + length2 = length - length1; + memcpy(data + repeat, this->buf + this->pos_read, length1); + memcpy(data + repeat + length1, this->buf, length2); + this->pos_read = length2; + } + + if (repeat) + data[0] = this->command_prev; + + this->full = 0; + return length + repeat; +} + +int line6_midibuf_ignore(struct midi_buffer *this, int length) +{ + int bytes_used = line6_midibuf_bytes_used(this); + + if (length > bytes_used) + length = bytes_used; + + this->pos_read = (this->pos_read + length) % this->size; + this->full = 0; + return length; +} + +void line6_midibuf_destroy(struct midi_buffer *this) +{ + kfree(this->buf); + this->buf = NULL; +} -- cgit v1.2.3