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/mantis/mantis_dma.c | 216 ++++++++++++++++++++++++++++++++++ 1 file changed, 216 insertions(+) create mode 100644 drivers/media/pci/mantis/mantis_dma.c (limited to 'drivers/media/pci/mantis/mantis_dma.c') diff --git a/drivers/media/pci/mantis/mantis_dma.c b/drivers/media/pci/mantis/mantis_dma.c new file mode 100644 index 000000000..80c843936 --- /dev/null +++ b/drivers/media/pci/mantis/mantis_dma.c @@ -0,0 +1,216 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + Mantis PCI bridge driver + + Copyright (C) Manu Abraham (abraham.manu@gmail.com) + +*/ + +#include +#include +#include +#include + +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include "mantis_common.h" +#include "mantis_reg.h" +#include "mantis_dma.h" + +#define RISC_WRITE (0x01 << 28) +#define RISC_JUMP (0x07 << 28) +#define RISC_IRQ (0x01 << 24) + +#define RISC_STATUS(status) ((((~status) & 0x0f) << 20) | ((status & 0x0f) << 16)) +#define RISC_FLUSH(risc_pos) (risc_pos = 0) +#define RISC_INSTR(risc_pos, opcode) (mantis->risc_cpu[risc_pos++] = cpu_to_le32(opcode)) + +#define MANTIS_BUF_SIZE (64 * 1024) +#define MANTIS_BLOCK_BYTES (MANTIS_BUF_SIZE / 4) +#define MANTIS_DMA_TR_BYTES (2 * 1024) /* upper limit: 4095 bytes. */ +#define MANTIS_BLOCK_COUNT (MANTIS_BUF_SIZE / MANTIS_BLOCK_BYTES) + +#define MANTIS_DMA_TR_UNITS (MANTIS_BLOCK_BYTES / MANTIS_DMA_TR_BYTES) +/* MANTIS_BUF_SIZE / MANTIS_DMA_TR_UNITS must not exceed MANTIS_RISC_SIZE (4k RISC cmd buffer) */ +#define MANTIS_RISC_SIZE PAGE_SIZE /* RISC program must fit here. */ + +int mantis_dma_exit(struct mantis_pci *mantis) +{ + if (mantis->buf_cpu) { + dprintk(MANTIS_ERROR, 1, + "DMA=0x%lx cpu=0x%p size=%d", + (unsigned long) mantis->buf_dma, + mantis->buf_cpu, + MANTIS_BUF_SIZE); + + dma_free_coherent(&mantis->pdev->dev, MANTIS_BUF_SIZE, + mantis->buf_cpu, mantis->buf_dma); + + mantis->buf_cpu = NULL; + } + if (mantis->risc_cpu) { + dprintk(MANTIS_ERROR, 1, + "RISC=0x%lx cpu=0x%p size=%lx", + (unsigned long) mantis->risc_dma, + mantis->risc_cpu, + MANTIS_RISC_SIZE); + + dma_free_coherent(&mantis->pdev->dev, MANTIS_RISC_SIZE, + mantis->risc_cpu, mantis->risc_dma); + + mantis->risc_cpu = NULL; + } + + return 0; +} +EXPORT_SYMBOL_GPL(mantis_dma_exit); + +static inline int mantis_alloc_buffers(struct mantis_pci *mantis) +{ + if (!mantis->buf_cpu) { + mantis->buf_cpu = dma_alloc_coherent(&mantis->pdev->dev, + MANTIS_BUF_SIZE, + &mantis->buf_dma, GFP_KERNEL); + if (!mantis->buf_cpu) { + dprintk(MANTIS_ERROR, 1, + "DMA buffer allocation failed"); + + goto err; + } + dprintk(MANTIS_ERROR, 1, + "DMA=0x%lx cpu=0x%p size=%d", + (unsigned long) mantis->buf_dma, + mantis->buf_cpu, MANTIS_BUF_SIZE); + } + if (!mantis->risc_cpu) { + mantis->risc_cpu = dma_alloc_coherent(&mantis->pdev->dev, + MANTIS_RISC_SIZE, + &mantis->risc_dma, GFP_KERNEL); + + if (!mantis->risc_cpu) { + dprintk(MANTIS_ERROR, 1, + "RISC program allocation failed"); + + mantis_dma_exit(mantis); + + goto err; + } + dprintk(MANTIS_ERROR, 1, + "RISC=0x%lx cpu=0x%p size=%lx", + (unsigned long) mantis->risc_dma, + mantis->risc_cpu, MANTIS_RISC_SIZE); + } + + return 0; +err: + dprintk(MANTIS_ERROR, 1, "Out of memory (?) ....."); + return -ENOMEM; +} + +int mantis_dma_init(struct mantis_pci *mantis) +{ + int err; + + dprintk(MANTIS_DEBUG, 1, "Mantis DMA init"); + err = mantis_alloc_buffers(mantis); + if (err < 0) { + dprintk(MANTIS_ERROR, 1, "Error allocating DMA buffer"); + + /* Stop RISC Engine */ + mmwrite(0, MANTIS_DMA_CTL); + + return err; + } + + return 0; +} +EXPORT_SYMBOL_GPL(mantis_dma_init); + +static inline void mantis_risc_program(struct mantis_pci *mantis) +{ + u32 buf_pos = 0; + u32 line, step; + u32 risc_pos; + + dprintk(MANTIS_DEBUG, 1, "Mantis create RISC program"); + RISC_FLUSH(risc_pos); + + dprintk(MANTIS_DEBUG, 1, "risc len lines %u, bytes per line %u, bytes per DMA tr %u", + MANTIS_BLOCK_COUNT, MANTIS_BLOCK_BYTES, MANTIS_DMA_TR_BYTES); + + for (line = 0; line < MANTIS_BLOCK_COUNT; line++) { + for (step = 0; step < MANTIS_DMA_TR_UNITS; step++) { + dprintk(MANTIS_DEBUG, 1, "RISC PROG line=[%d], step=[%d]", line, step); + if (step == 0) { + RISC_INSTR(risc_pos, RISC_WRITE | + RISC_IRQ | + RISC_STATUS(line) | + MANTIS_DMA_TR_BYTES); + } else { + RISC_INSTR(risc_pos, RISC_WRITE | MANTIS_DMA_TR_BYTES); + } + RISC_INSTR(risc_pos, mantis->buf_dma + buf_pos); + buf_pos += MANTIS_DMA_TR_BYTES; + } + } + RISC_INSTR(risc_pos, RISC_JUMP); + RISC_INSTR(risc_pos, mantis->risc_dma); +} + +void mantis_dma_start(struct mantis_pci *mantis) +{ + dprintk(MANTIS_DEBUG, 1, "Mantis Start DMA engine"); + + mantis_risc_program(mantis); + mmwrite(mantis->risc_dma, MANTIS_RISC_START); + mmwrite(mmread(MANTIS_GPIF_ADDR) | MANTIS_GPIF_HIFRDWRN, MANTIS_GPIF_ADDR); + + mmwrite(0, MANTIS_DMA_CTL); + mantis->last_block = mantis->busy_block = 0; + + mantis_unmask_ints(mantis, MANTIS_INT_RISCI); + + mmwrite(MANTIS_FIFO_EN | MANTIS_DCAP_EN + | MANTIS_RISC_EN, MANTIS_DMA_CTL); + +} + +void mantis_dma_stop(struct mantis_pci *mantis) +{ + dprintk(MANTIS_DEBUG, 1, "Mantis Stop DMA engine"); + + mmwrite((mmread(MANTIS_GPIF_ADDR) & (~(MANTIS_GPIF_HIFRDWRN))), MANTIS_GPIF_ADDR); + + mmwrite((mmread(MANTIS_DMA_CTL) & ~(MANTIS_FIFO_EN | + MANTIS_DCAP_EN | + MANTIS_RISC_EN)), MANTIS_DMA_CTL); + + mmwrite(mmread(MANTIS_INT_STAT), MANTIS_INT_STAT); + + mantis_mask_ints(mantis, MANTIS_INT_RISCI | MANTIS_INT_RISCEN); +} + + +void mantis_dma_xfer(struct tasklet_struct *t) +{ + struct mantis_pci *mantis = from_tasklet(mantis, t, tasklet); + struct mantis_hwconfig *config = mantis->hwconfig; + + while (mantis->last_block != mantis->busy_block) { + dprintk(MANTIS_DEBUG, 1, "last block=[%d] finished block=[%d]", + mantis->last_block, mantis->busy_block); + + (config->ts_size ? dvb_dmx_swfilter_204 : dvb_dmx_swfilter) + (&mantis->demux, &mantis->buf_cpu[mantis->last_block * MANTIS_BLOCK_BYTES], MANTIS_BLOCK_BYTES); + mantis->last_block = (mantis->last_block + 1) % MANTIS_BLOCK_COUNT; + } +} -- cgit v1.2.3