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/core/seq/seq_memory.c | 507 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 507 insertions(+) create mode 100644 sound/core/seq/seq_memory.c (limited to 'sound/core/seq/seq_memory.c') diff --git a/sound/core/seq/seq_memory.c b/sound/core/seq/seq_memory.c new file mode 100644 index 000000000..47ef6bc30 --- /dev/null +++ b/sound/core/seq/seq_memory.c @@ -0,0 +1,507 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * ALSA sequencer Memory Manager + * Copyright (c) 1998 by Frank van de Pol + * Jaroslav Kysela + * 2000 by Takashi Iwai + */ + +#include +#include +#include +#include +#include +#include + +#include +#include "seq_memory.h" +#include "seq_queue.h" +#include "seq_info.h" +#include "seq_lock.h" + +static inline int snd_seq_pool_available(struct snd_seq_pool *pool) +{ + return pool->total_elements - atomic_read(&pool->counter); +} + +static inline int snd_seq_output_ok(struct snd_seq_pool *pool) +{ + return snd_seq_pool_available(pool) >= pool->room; +} + +/* + * Variable length event: + * The event like sysex uses variable length type. + * The external data may be stored in three different formats. + * 1) kernel space + * This is the normal case. + * ext.data.len = length + * ext.data.ptr = buffer pointer + * 2) user space + * When an event is generated via read(), the external data is + * kept in user space until expanded. + * ext.data.len = length | SNDRV_SEQ_EXT_USRPTR + * ext.data.ptr = userspace pointer + * 3) chained cells + * When the variable length event is enqueued (in prioq or fifo), + * the external data is decomposed to several cells. + * ext.data.len = length | SNDRV_SEQ_EXT_CHAINED + * ext.data.ptr = the additiona cell head + * -> cell.next -> cell.next -> .. + */ + +/* + * exported: + * call dump function to expand external data. + */ + +static int get_var_len(const struct snd_seq_event *event) +{ + if ((event->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) != SNDRV_SEQ_EVENT_LENGTH_VARIABLE) + return -EINVAL; + + return event->data.ext.len & ~SNDRV_SEQ_EXT_MASK; +} + +int snd_seq_dump_var_event(const struct snd_seq_event *event, + snd_seq_dump_func_t func, void *private_data) +{ + int len, err; + struct snd_seq_event_cell *cell; + + len = get_var_len(event); + if (len <= 0) + return len; + + if (event->data.ext.len & SNDRV_SEQ_EXT_USRPTR) { + char buf[32]; + char __user *curptr = (char __force __user *)event->data.ext.ptr; + while (len > 0) { + int size = sizeof(buf); + if (len < size) + size = len; + if (copy_from_user(buf, curptr, size)) + return -EFAULT; + err = func(private_data, buf, size); + if (err < 0) + return err; + curptr += size; + len -= size; + } + return 0; + } + if (!(event->data.ext.len & SNDRV_SEQ_EXT_CHAINED)) + return func(private_data, event->data.ext.ptr, len); + + cell = (struct snd_seq_event_cell *)event->data.ext.ptr; + for (; len > 0 && cell; cell = cell->next) { + int size = sizeof(struct snd_seq_event); + if (len < size) + size = len; + err = func(private_data, &cell->event, size); + if (err < 0) + return err; + len -= size; + } + return 0; +} +EXPORT_SYMBOL(snd_seq_dump_var_event); + + +/* + * exported: + * expand the variable length event to linear buffer space. + */ + +static int seq_copy_in_kernel(void *ptr, void *src, int size) +{ + char **bufptr = ptr; + + memcpy(*bufptr, src, size); + *bufptr += size; + return 0; +} + +static int seq_copy_in_user(void *ptr, void *src, int size) +{ + char __user **bufptr = ptr; + + if (copy_to_user(*bufptr, src, size)) + return -EFAULT; + *bufptr += size; + return 0; +} + +int snd_seq_expand_var_event(const struct snd_seq_event *event, int count, char *buf, + int in_kernel, int size_aligned) +{ + int len, newlen; + int err; + + len = get_var_len(event); + if (len < 0) + return len; + newlen = len; + if (size_aligned > 0) + newlen = roundup(len, size_aligned); + if (count < newlen) + return -EAGAIN; + + if (event->data.ext.len & SNDRV_SEQ_EXT_USRPTR) { + if (! in_kernel) + return -EINVAL; + if (copy_from_user(buf, (void __force __user *)event->data.ext.ptr, len)) + return -EFAULT; + return newlen; + } + err = snd_seq_dump_var_event(event, + in_kernel ? seq_copy_in_kernel : seq_copy_in_user, + &buf); + return err < 0 ? err : newlen; +} +EXPORT_SYMBOL(snd_seq_expand_var_event); + +/* + * release this cell, free extended data if available + */ + +static inline void free_cell(struct snd_seq_pool *pool, + struct snd_seq_event_cell *cell) +{ + cell->next = pool->free; + pool->free = cell; + atomic_dec(&pool->counter); +} + +void snd_seq_cell_free(struct snd_seq_event_cell * cell) +{ + unsigned long flags; + struct snd_seq_pool *pool; + + if (snd_BUG_ON(!cell)) + return; + pool = cell->pool; + if (snd_BUG_ON(!pool)) + return; + + spin_lock_irqsave(&pool->lock, flags); + free_cell(pool, cell); + if (snd_seq_ev_is_variable(&cell->event)) { + if (cell->event.data.ext.len & SNDRV_SEQ_EXT_CHAINED) { + struct snd_seq_event_cell *curp, *nextptr; + curp = cell->event.data.ext.ptr; + for (; curp; curp = nextptr) { + nextptr = curp->next; + curp->next = pool->free; + free_cell(pool, curp); + } + } + } + if (waitqueue_active(&pool->output_sleep)) { + /* has enough space now? */ + if (snd_seq_output_ok(pool)) + wake_up(&pool->output_sleep); + } + spin_unlock_irqrestore(&pool->lock, flags); +} + + +/* + * allocate an event cell. + */ +static int snd_seq_cell_alloc(struct snd_seq_pool *pool, + struct snd_seq_event_cell **cellp, + int nonblock, struct file *file, + struct mutex *mutexp) +{ + struct snd_seq_event_cell *cell; + unsigned long flags; + int err = -EAGAIN; + wait_queue_entry_t wait; + + if (pool == NULL) + return -EINVAL; + + *cellp = NULL; + + init_waitqueue_entry(&wait, current); + spin_lock_irqsave(&pool->lock, flags); + if (pool->ptr == NULL) { /* not initialized */ + pr_debug("ALSA: seq: pool is not initialized\n"); + err = -EINVAL; + goto __error; + } + while (pool->free == NULL && ! nonblock && ! pool->closing) { + + set_current_state(TASK_INTERRUPTIBLE); + add_wait_queue(&pool->output_sleep, &wait); + spin_unlock_irqrestore(&pool->lock, flags); + if (mutexp) + mutex_unlock(mutexp); + schedule(); + if (mutexp) + mutex_lock(mutexp); + spin_lock_irqsave(&pool->lock, flags); + remove_wait_queue(&pool->output_sleep, &wait); + /* interrupted? */ + if (signal_pending(current)) { + err = -ERESTARTSYS; + goto __error; + } + } + if (pool->closing) { /* closing.. */ + err = -ENOMEM; + goto __error; + } + + cell = pool->free; + if (cell) { + int used; + pool->free = cell->next; + atomic_inc(&pool->counter); + used = atomic_read(&pool->counter); + if (pool->max_used < used) + pool->max_used = used; + pool->event_alloc_success++; + /* clear cell pointers */ + cell->next = NULL; + err = 0; + } else + pool->event_alloc_failures++; + *cellp = cell; + +__error: + spin_unlock_irqrestore(&pool->lock, flags); + return err; +} + + +/* + * duplicate the event to a cell. + * if the event has external data, the data is decomposed to additional + * cells. + */ +int snd_seq_event_dup(struct snd_seq_pool *pool, struct snd_seq_event *event, + struct snd_seq_event_cell **cellp, int nonblock, + struct file *file, struct mutex *mutexp) +{ + int ncells, err; + unsigned int extlen; + struct snd_seq_event_cell *cell; + + *cellp = NULL; + + ncells = 0; + extlen = 0; + if (snd_seq_ev_is_variable(event)) { + extlen = event->data.ext.len & ~SNDRV_SEQ_EXT_MASK; + ncells = DIV_ROUND_UP(extlen, sizeof(struct snd_seq_event)); + } + if (ncells >= pool->total_elements) + return -ENOMEM; + + err = snd_seq_cell_alloc(pool, &cell, nonblock, file, mutexp); + if (err < 0) + return err; + + /* copy the event */ + cell->event = *event; + + /* decompose */ + if (snd_seq_ev_is_variable(event)) { + int len = extlen; + int is_chained = event->data.ext.len & SNDRV_SEQ_EXT_CHAINED; + int is_usrptr = event->data.ext.len & SNDRV_SEQ_EXT_USRPTR; + struct snd_seq_event_cell *src, *tmp, *tail; + char *buf; + + cell->event.data.ext.len = extlen | SNDRV_SEQ_EXT_CHAINED; + cell->event.data.ext.ptr = NULL; + + src = (struct snd_seq_event_cell *)event->data.ext.ptr; + buf = (char *)event->data.ext.ptr; + tail = NULL; + + while (ncells-- > 0) { + int size = sizeof(struct snd_seq_event); + if (len < size) + size = len; + err = snd_seq_cell_alloc(pool, &tmp, nonblock, file, + mutexp); + if (err < 0) + goto __error; + if (cell->event.data.ext.ptr == NULL) + cell->event.data.ext.ptr = tmp; + if (tail) + tail->next = tmp; + tail = tmp; + /* copy chunk */ + if (is_chained && src) { + tmp->event = src->event; + src = src->next; + } else if (is_usrptr) { + if (copy_from_user(&tmp->event, (char __force __user *)buf, size)) { + err = -EFAULT; + goto __error; + } + } else { + memcpy(&tmp->event, buf, size); + } + buf += size; + len -= size; + } + } + + *cellp = cell; + return 0; + +__error: + snd_seq_cell_free(cell); + return err; +} + + +/* poll wait */ +int snd_seq_pool_poll_wait(struct snd_seq_pool *pool, struct file *file, + poll_table *wait) +{ + poll_wait(file, &pool->output_sleep, wait); + return snd_seq_output_ok(pool); +} + + +/* allocate room specified number of events */ +int snd_seq_pool_init(struct snd_seq_pool *pool) +{ + int cell; + struct snd_seq_event_cell *cellptr; + + if (snd_BUG_ON(!pool)) + return -EINVAL; + + cellptr = kvmalloc_array(sizeof(struct snd_seq_event_cell), pool->size, + GFP_KERNEL); + if (!cellptr) + return -ENOMEM; + + /* add new cells to the free cell list */ + spin_lock_irq(&pool->lock); + if (pool->ptr) { + spin_unlock_irq(&pool->lock); + kvfree(cellptr); + return 0; + } + + pool->ptr = cellptr; + pool->free = NULL; + + for (cell = 0; cell < pool->size; cell++) { + cellptr = pool->ptr + cell; + cellptr->pool = pool; + cellptr->next = pool->free; + pool->free = cellptr; + } + pool->room = (pool->size + 1) / 2; + + /* init statistics */ + pool->max_used = 0; + pool->total_elements = pool->size; + spin_unlock_irq(&pool->lock); + return 0; +} + +/* refuse the further insertion to the pool */ +void snd_seq_pool_mark_closing(struct snd_seq_pool *pool) +{ + unsigned long flags; + + if (snd_BUG_ON(!pool)) + return; + spin_lock_irqsave(&pool->lock, flags); + pool->closing = 1; + spin_unlock_irqrestore(&pool->lock, flags); +} + +/* remove events */ +int snd_seq_pool_done(struct snd_seq_pool *pool) +{ + struct snd_seq_event_cell *ptr; + + if (snd_BUG_ON(!pool)) + return -EINVAL; + + /* wait for closing all threads */ + if (waitqueue_active(&pool->output_sleep)) + wake_up(&pool->output_sleep); + + while (atomic_read(&pool->counter) > 0) + schedule_timeout_uninterruptible(1); + + /* release all resources */ + spin_lock_irq(&pool->lock); + ptr = pool->ptr; + pool->ptr = NULL; + pool->free = NULL; + pool->total_elements = 0; + spin_unlock_irq(&pool->lock); + + kvfree(ptr); + + spin_lock_irq(&pool->lock); + pool->closing = 0; + spin_unlock_irq(&pool->lock); + + return 0; +} + + +/* init new memory pool */ +struct snd_seq_pool *snd_seq_pool_new(int poolsize) +{ + struct snd_seq_pool *pool; + + /* create pool block */ + pool = kzalloc(sizeof(*pool), GFP_KERNEL); + if (!pool) + return NULL; + spin_lock_init(&pool->lock); + pool->ptr = NULL; + pool->free = NULL; + pool->total_elements = 0; + atomic_set(&pool->counter, 0); + pool->closing = 0; + init_waitqueue_head(&pool->output_sleep); + + pool->size = poolsize; + + /* init statistics */ + pool->max_used = 0; + return pool; +} + +/* remove memory pool */ +int snd_seq_pool_delete(struct snd_seq_pool **ppool) +{ + struct snd_seq_pool *pool = *ppool; + + *ppool = NULL; + if (pool == NULL) + return 0; + snd_seq_pool_mark_closing(pool); + snd_seq_pool_done(pool); + kfree(pool); + return 0; +} + +/* exported to seq_clientmgr.c */ +void snd_seq_info_pool(struct snd_info_buffer *buffer, + struct snd_seq_pool *pool, char *space) +{ + if (pool == NULL) + return; + snd_iprintf(buffer, "%sPool size : %d\n", space, pool->total_elements); + snd_iprintf(buffer, "%sCells in use : %d\n", space, atomic_read(&pool->counter)); + snd_iprintf(buffer, "%sPeak cells in use : %d\n", space, pool->max_used); + snd_iprintf(buffer, "%sAlloc success : %d\n", space, pool->event_alloc_success); + snd_iprintf(buffer, "%sAlloc failures : %d\n", space, pool->event_alloc_failures); +} -- 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