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/cx23885/cx23885-vbi.c | 256 ++++++++++++++++++++++++++++++++ 1 file changed, 256 insertions(+) create mode 100644 drivers/media/pci/cx23885/cx23885-vbi.c (limited to 'drivers/media/pci/cx23885/cx23885-vbi.c') diff --git a/drivers/media/pci/cx23885/cx23885-vbi.c b/drivers/media/pci/cx23885/cx23885-vbi.c new file mode 100644 index 000000000..4bdd2bea3 --- /dev/null +++ b/drivers/media/pci/cx23885/cx23885-vbi.c @@ -0,0 +1,256 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for the Conexant CX23885 PCIe bridge + * + * Copyright (c) 2007 Steven Toth + */ + +#include "cx23885.h" + +#include +#include +#include +#include + +static unsigned int vbibufs = 4; +module_param(vbibufs, int, 0644); +MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32"); + +static unsigned int vbi_debug; +module_param(vbi_debug, int, 0644); +MODULE_PARM_DESC(vbi_debug, "enable debug messages [vbi]"); + +#define dprintk(level, fmt, arg...)\ + do { if (vbi_debug >= level)\ + printk(KERN_DEBUG pr_fmt("%s: vbi:" fmt), \ + __func__, ##arg); \ + } while (0) + +/* ------------------------------------------------------------------ */ + +#define VBI_LINE_LENGTH 1440 +#define VBI_NTSC_LINE_COUNT 12 +#define VBI_PAL_LINE_COUNT 18 + + +int cx23885_vbi_fmt(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct cx23885_dev *dev = video_drvdata(file); + + f->fmt.vbi.sampling_rate = 27000000; + f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH; + f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; + f->fmt.vbi.offset = 0; + f->fmt.vbi.flags = 0; + if (dev->tvnorm & V4L2_STD_525_60) { + /* ntsc */ + f->fmt.vbi.start[0] = V4L2_VBI_ITU_525_F1_START + 9; + f->fmt.vbi.start[1] = V4L2_VBI_ITU_525_F2_START + 9; + f->fmt.vbi.count[0] = VBI_NTSC_LINE_COUNT; + f->fmt.vbi.count[1] = VBI_NTSC_LINE_COUNT; + } else if (dev->tvnorm & V4L2_STD_625_50) { + /* pal */ + f->fmt.vbi.start[0] = V4L2_VBI_ITU_625_F1_START + 5; + f->fmt.vbi.start[1] = V4L2_VBI_ITU_625_F2_START + 5; + f->fmt.vbi.count[0] = VBI_PAL_LINE_COUNT; + f->fmt.vbi.count[1] = VBI_PAL_LINE_COUNT; + } + + return 0; +} + +/* We're given the Video Interrupt status register. + * The cx23885_video_irq() func has already validated + * the potential error bits, we just need to + * deal with vbi payload and return indication if + * we actually processed any payload. + */ +int cx23885_vbi_irq(struct cx23885_dev *dev, u32 status) +{ + u32 count; + int handled = 0; + + if (status & VID_BC_MSK_VBI_RISCI1) { + dprintk(1, "%s() VID_BC_MSK_VBI_RISCI1\n", __func__); + spin_lock(&dev->slock); + count = cx_read(VBI_A_GPCNT); + cx23885_video_wakeup(dev, &dev->vbiq, count); + spin_unlock(&dev->slock); + handled++; + } + + return handled; +} + +static int cx23885_start_vbi_dma(struct cx23885_dev *dev, + struct cx23885_dmaqueue *q, + struct cx23885_buffer *buf) +{ + dprintk(1, "%s()\n", __func__); + + /* setup fifo + format */ + cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02], + VBI_LINE_LENGTH, buf->risc.dma); + + /* reset counter */ + cx_write(VID_A_VBI_CTRL, 3); + cx_write(VBI_A_GPCNT_CTL, 3); + q->count = 0; + + /* enable irq */ + cx23885_irq_add_enable(dev, 0x01); + cx_set(VID_A_INT_MSK, 0x000022); + + /* start dma */ + cx_set(DEV_CNTRL2, (1<<5)); + cx_set(VID_A_DMA_CTL, 0x22); /* FIFO and RISC enable */ + + return 0; +} + +/* ------------------------------------------------------------------ */ + +static int queue_setup(struct vb2_queue *q, + unsigned int *num_buffers, unsigned int *num_planes, + unsigned int sizes[], struct device *alloc_devs[]) +{ + struct cx23885_dev *dev = q->drv_priv; + unsigned lines = VBI_PAL_LINE_COUNT; + + if (dev->tvnorm & V4L2_STD_525_60) + lines = VBI_NTSC_LINE_COUNT; + *num_planes = 1; + sizes[0] = lines * VBI_LINE_LENGTH * 2; + return 0; +} + +static int buffer_prepare(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct cx23885_dev *dev = vb->vb2_queue->drv_priv; + struct cx23885_buffer *buf = container_of(vbuf, + struct cx23885_buffer, vb); + struct sg_table *sgt = vb2_dma_sg_plane_desc(vb, 0); + unsigned lines = VBI_PAL_LINE_COUNT; + + if (dev->tvnorm & V4L2_STD_525_60) + lines = VBI_NTSC_LINE_COUNT; + + if (vb2_plane_size(vb, 0) < lines * VBI_LINE_LENGTH * 2) + return -EINVAL; + vb2_set_plane_payload(vb, 0, lines * VBI_LINE_LENGTH * 2); + + cx23885_risc_vbibuffer(dev->pci, &buf->risc, + sgt->sgl, + 0, VBI_LINE_LENGTH * lines, + VBI_LINE_LENGTH, 0, + lines); + return 0; +} + +static void buffer_finish(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct cx23885_buffer *buf = container_of(vbuf, + struct cx23885_buffer, vb); + + cx23885_free_buffer(vb->vb2_queue->drv_priv, buf); +} + +/* + * The risc program for each buffer works as follows: it starts with a simple + * 'JUMP to addr + 12', which is effectively a NOP. Then the code to DMA the + * buffer follows and at the end we have a JUMP back to the start + 12 (skipping + * the initial JUMP). + * + * This is the risc program of the first buffer to be queued if the active list + * is empty and it just keeps DMAing this buffer without generating any + * interrupts. + * + * If a new buffer is added then the initial JUMP in the code for that buffer + * will generate an interrupt which signals that the previous buffer has been + * DMAed successfully and that it can be returned to userspace. + * + * It also sets the final jump of the previous buffer to the start of the new + * buffer, thus chaining the new buffer into the DMA chain. This is a single + * atomic u32 write, so there is no race condition. + * + * The end-result of all this that you only get an interrupt when a buffer + * is ready, so the control flow is very easy. + */ +static void buffer_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct cx23885_dev *dev = vb->vb2_queue->drv_priv; + struct cx23885_buffer *buf = container_of(vbuf, + struct cx23885_buffer, vb); + struct cx23885_buffer *prev; + struct cx23885_dmaqueue *q = &dev->vbiq; + unsigned long flags; + + buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 12); + buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC); + buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 12); + buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ + + if (list_empty(&q->active)) { + spin_lock_irqsave(&dev->slock, flags); + list_add_tail(&buf->queue, &q->active); + spin_unlock_irqrestore(&dev->slock, flags); + dprintk(2, "[%p/%d] vbi_queue - first active\n", + buf, buf->vb.vb2_buf.index); + + } else { + buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1); + prev = list_entry(q->active.prev, struct cx23885_buffer, + queue); + spin_lock_irqsave(&dev->slock, flags); + list_add_tail(&buf->queue, &q->active); + spin_unlock_irqrestore(&dev->slock, flags); + prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma); + dprintk(2, "[%p/%d] buffer_queue - append to active\n", + buf, buf->vb.vb2_buf.index); + } +} + +static int cx23885_start_streaming(struct vb2_queue *q, unsigned int count) +{ + struct cx23885_dev *dev = q->drv_priv; + struct cx23885_dmaqueue *dmaq = &dev->vbiq; + struct cx23885_buffer *buf = list_entry(dmaq->active.next, + struct cx23885_buffer, queue); + + cx23885_start_vbi_dma(dev, dmaq, buf); + return 0; +} + +static void cx23885_stop_streaming(struct vb2_queue *q) +{ + struct cx23885_dev *dev = q->drv_priv; + struct cx23885_dmaqueue *dmaq = &dev->vbiq; + unsigned long flags; + + cx_clear(VID_A_DMA_CTL, 0x22); /* FIFO and RISC enable */ + spin_lock_irqsave(&dev->slock, flags); + while (!list_empty(&dmaq->active)) { + struct cx23885_buffer *buf = list_entry(dmaq->active.next, + struct cx23885_buffer, queue); + + list_del(&buf->queue); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + } + spin_unlock_irqrestore(&dev->slock, flags); +} + + +const struct vb2_ops cx23885_vbi_qops = { + .queue_setup = queue_setup, + .buf_prepare = buffer_prepare, + .buf_finish = buffer_finish, + .buf_queue = buffer_queue, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .start_streaming = cx23885_start_streaming, + .stop_streaming = cx23885_stop_streaming, +}; -- cgit v1.2.3