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(). ... --- drivers/media/pci/cx18/cx18-alsa-pcm.c | 272 +++++++++++++++++++++++++++++++++ 1 file changed, 272 insertions(+) create mode 100644 drivers/media/pci/cx18/cx18-alsa-pcm.c (limited to 'drivers/media/pci/cx18/cx18-alsa-pcm.c') diff --git a/drivers/media/pci/cx18/cx18-alsa-pcm.c b/drivers/media/pci/cx18/cx18-alsa-pcm.c new file mode 100644 index 000000000..bed28b4b4 --- /dev/null +++ b/drivers/media/pci/cx18/cx18-alsa-pcm.c @@ -0,0 +1,272 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * ALSA PCM device for the + * ALSA interface to cx18 PCM capture streams + * + * Copyright (C) 2009 Andy Walls + * Copyright (C) 2009 Devin Heitmueller + * + * Portions of this work were sponsored by ONELAN Limited. + */ + +#include +#include + +#include + +#include +#include + +#include "cx18-driver.h" +#include "cx18-queue.h" +#include "cx18-streams.h" +#include "cx18-fileops.h" +#include "cx18-alsa.h" +#include "cx18-alsa-pcm.h" + +static unsigned int pcm_debug; +module_param(pcm_debug, int, 0644); +MODULE_PARM_DESC(pcm_debug, "enable debug messages for pcm"); + +#define dprintk(fmt, arg...) do { \ + if (pcm_debug) \ + printk(KERN_INFO "cx18-alsa-pcm %s: " fmt, \ + __func__, ##arg); \ + } while (0) + +static const struct snd_pcm_hardware snd_cx18_hw_capture = { + .info = SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_MMAP_VALID, + + .formats = SNDRV_PCM_FMTBIT_S16_LE, + + .rates = SNDRV_PCM_RATE_48000, + + .rate_min = 48000, + .rate_max = 48000, + .channels_min = 2, + .channels_max = 2, + .buffer_bytes_max = 62720 * 8, /* just about the value in usbaudio.c */ + .period_bytes_min = 64, /* 12544/2, */ + .period_bytes_max = 12544, + .periods_min = 2, + .periods_max = 98, /* 12544, */ +}; + +void cx18_alsa_announce_pcm_data(struct snd_cx18_card *cxsc, u8 *pcm_data, + size_t num_bytes) +{ + struct snd_pcm_substream *substream; + struct snd_pcm_runtime *runtime; + unsigned int oldptr; + unsigned int stride; + int period_elapsed = 0; + int length; + + dprintk("cx18 alsa announce ptr=%p data=%p num_bytes=%zu\n", cxsc, + pcm_data, num_bytes); + + substream = cxsc->capture_pcm_substream; + if (substream == NULL) { + dprintk("substream was NULL\n"); + return; + } + + runtime = substream->runtime; + if (runtime == NULL) { + dprintk("runtime was NULL\n"); + return; + } + + stride = runtime->frame_bits >> 3; + if (stride == 0) { + dprintk("stride is zero\n"); + return; + } + + length = num_bytes / stride; + if (length == 0) { + dprintk("%s: length was zero\n", __func__); + return; + } + + if (runtime->dma_area == NULL) { + dprintk("dma area was NULL - ignoring\n"); + return; + } + + oldptr = cxsc->hwptr_done_capture; + if (oldptr + length >= runtime->buffer_size) { + unsigned int cnt = + runtime->buffer_size - oldptr; + memcpy(runtime->dma_area + oldptr * stride, pcm_data, + cnt * stride); + memcpy(runtime->dma_area, pcm_data + cnt * stride, + length * stride - cnt * stride); + } else { + memcpy(runtime->dma_area + oldptr * stride, pcm_data, + length * stride); + } + snd_pcm_stream_lock(substream); + + cxsc->hwptr_done_capture += length; + if (cxsc->hwptr_done_capture >= + runtime->buffer_size) + cxsc->hwptr_done_capture -= + runtime->buffer_size; + + cxsc->capture_transfer_done += length; + if (cxsc->capture_transfer_done >= + runtime->period_size) { + cxsc->capture_transfer_done -= + runtime->period_size; + period_elapsed = 1; + } + + snd_pcm_stream_unlock(substream); + + if (period_elapsed) + snd_pcm_period_elapsed(substream); +} + +static int snd_cx18_pcm_capture_open(struct snd_pcm_substream *substream) +{ + struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + struct v4l2_device *v4l2_dev = cxsc->v4l2_dev; + struct cx18 *cx = to_cx18(v4l2_dev); + struct cx18_stream *s; + struct cx18_open_id item; + int ret; + + /* Instruct the cx18 to start sending packets */ + snd_cx18_lock(cxsc); + s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM]; + + item.cx = cx; + item.type = s->type; + item.open_id = cx->open_id++; + + /* See if the stream is available */ + if (cx18_claim_stream(&item, item.type)) { + /* No, it's already in use */ + snd_cx18_unlock(cxsc); + return -EBUSY; + } + + if (test_bit(CX18_F_S_STREAMOFF, &s->s_flags) || + test_and_set_bit(CX18_F_S_STREAMING, &s->s_flags)) { + /* We're already streaming. No additional action required */ + snd_cx18_unlock(cxsc); + return 0; + } + + + runtime->hw = snd_cx18_hw_capture; + snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + cxsc->capture_pcm_substream = substream; + runtime->private_data = cx; + + cx->pcm_announce_callback = cx18_alsa_announce_pcm_data; + + /* Not currently streaming, so start it up */ + set_bit(CX18_F_S_STREAMING, &s->s_flags); + ret = cx18_start_v4l2_encode_stream(s); + snd_cx18_unlock(cxsc); + + return ret; +} + +static int snd_cx18_pcm_capture_close(struct snd_pcm_substream *substream) +{ + struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream); + struct v4l2_device *v4l2_dev = cxsc->v4l2_dev; + struct cx18 *cx = to_cx18(v4l2_dev); + struct cx18_stream *s; + + /* Instruct the cx18 to stop sending packets */ + snd_cx18_lock(cxsc); + s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM]; + cx18_stop_v4l2_encode_stream(s, 0); + clear_bit(CX18_F_S_STREAMING, &s->s_flags); + + cx18_release_stream(s); + + cx->pcm_announce_callback = NULL; + snd_cx18_unlock(cxsc); + + return 0; +} + +static int snd_cx18_pcm_prepare(struct snd_pcm_substream *substream) +{ + struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream); + + cxsc->hwptr_done_capture = 0; + cxsc->capture_transfer_done = 0; + + return 0; +} + +static int snd_cx18_pcm_trigger(struct snd_pcm_substream *substream, int cmd) +{ + return 0; +} + +static +snd_pcm_uframes_t snd_cx18_pcm_pointer(struct snd_pcm_substream *substream) +{ + unsigned long flags; + snd_pcm_uframes_t hwptr_done; + struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream); + + spin_lock_irqsave(&cxsc->slock, flags); + hwptr_done = cxsc->hwptr_done_capture; + spin_unlock_irqrestore(&cxsc->slock, flags); + + return hwptr_done; +} + +static const struct snd_pcm_ops snd_cx18_pcm_capture_ops = { + .open = snd_cx18_pcm_capture_open, + .close = snd_cx18_pcm_capture_close, + .prepare = snd_cx18_pcm_prepare, + .trigger = snd_cx18_pcm_trigger, + .pointer = snd_cx18_pcm_pointer, +}; + +int snd_cx18_pcm_create(struct snd_cx18_card *cxsc) +{ + struct snd_pcm *sp; + struct snd_card *sc = cxsc->sc; + struct v4l2_device *v4l2_dev = cxsc->v4l2_dev; + struct cx18 *cx = to_cx18(v4l2_dev); + int ret; + + ret = snd_pcm_new(sc, "CX23418 PCM", + 0, /* PCM device 0, the only one for this card */ + 0, /* 0 playback substreams */ + 1, /* 1 capture substream */ + &sp); + if (ret) { + CX18_ALSA_ERR("%s: snd_cx18_pcm_create() failed with err %d\n", + __func__, ret); + goto err_exit; + } + + spin_lock_init(&cxsc->slock); + + snd_pcm_set_ops(sp, SNDRV_PCM_STREAM_CAPTURE, + &snd_cx18_pcm_capture_ops); + snd_pcm_set_managed_buffer_all(sp, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0); + sp->info_flags = 0; + sp->private_data = cxsc; + strscpy(sp->name, cx->card_name, sizeof(sp->name)); + + return 0; + +err_exit: + return ret; +} -- cgit v1.2.3