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/gpu/drm/nouveau/nvkm/core/event.c | 214 ++++++++++++++++++++++++++++++ 1 file changed, 214 insertions(+) create mode 100644 drivers/gpu/drm/nouveau/nvkm/core/event.c (limited to 'drivers/gpu/drm/nouveau/nvkm/core/event.c') diff --git a/drivers/gpu/drm/nouveau/nvkm/core/event.c b/drivers/gpu/drm/nouveau/nvkm/core/event.c new file mode 100644 index 000000000..a6c877135 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/core/event.c @@ -0,0 +1,214 @@ +/* + * Copyright 2013-2014 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ +#include +#include + +static void +nvkm_event_put(struct nvkm_event *event, u32 types, int index) +{ + assert_spin_locked(&event->refs_lock); + + nvkm_trace(event->subdev, "event: decr %08x on %d\n", types, index); + + while (types) { + int type = __ffs(types); types &= ~(1 << type); + if (--event->refs[index * event->types_nr + type] == 0) { + nvkm_trace(event->subdev, "event: blocking %d on %d\n", type, index); + if (event->func->fini) + event->func->fini(event, 1 << type, index); + } + } +} + +static void +nvkm_event_get(struct nvkm_event *event, u32 types, int index) +{ + assert_spin_locked(&event->refs_lock); + + nvkm_trace(event->subdev, "event: incr %08x on %d\n", types, index); + + while (types) { + int type = __ffs(types); types &= ~(1 << type); + if (++event->refs[index * event->types_nr + type] == 1) { + nvkm_trace(event->subdev, "event: allowing %d on %d\n", type, index); + if (event->func->init) + event->func->init(event, 1 << type, index); + } + } +} + +static void +nvkm_event_ntfy_state(struct nvkm_event_ntfy *ntfy) +{ + struct nvkm_event *event = ntfy->event; + unsigned long flags; + + nvkm_trace(event->subdev, "event: ntfy state changed\n"); + spin_lock_irqsave(&event->refs_lock, flags); + + if (atomic_read(&ntfy->allowed) != ntfy->running) { + if (ntfy->running) { + nvkm_event_put(ntfy->event, ntfy->bits, ntfy->id); + ntfy->running = false; + } else { + nvkm_event_get(ntfy->event, ntfy->bits, ntfy->id); + ntfy->running = true; + } + } + + spin_unlock_irqrestore(&event->refs_lock, flags); +} + +static void +nvkm_event_ntfy_remove(struct nvkm_event_ntfy *ntfy) +{ + spin_lock_irq(&ntfy->event->list_lock); + list_del_init(&ntfy->head); + spin_unlock_irq(&ntfy->event->list_lock); +} + +static void +nvkm_event_ntfy_insert(struct nvkm_event_ntfy *ntfy) +{ + spin_lock_irq(&ntfy->event->list_lock); + list_add_tail(&ntfy->head, &ntfy->event->ntfy); + spin_unlock_irq(&ntfy->event->list_lock); +} + +static void +nvkm_event_ntfy_block_(struct nvkm_event_ntfy *ntfy, bool wait) +{ + struct nvkm_subdev *subdev = ntfy->event->subdev; + + nvkm_trace(subdev, "event: ntfy block %08x on %d wait:%d\n", ntfy->bits, ntfy->id, wait); + + if (atomic_xchg(&ntfy->allowed, 0) == 1) { + nvkm_event_ntfy_state(ntfy); + if (wait) + nvkm_event_ntfy_remove(ntfy); + } +} + +void +nvkm_event_ntfy_block(struct nvkm_event_ntfy *ntfy) +{ + if (ntfy->event) + nvkm_event_ntfy_block_(ntfy, ntfy->wait); +} + +void +nvkm_event_ntfy_allow(struct nvkm_event_ntfy *ntfy) +{ + nvkm_trace(ntfy->event->subdev, "event: ntfy allow %08x on %d\n", ntfy->bits, ntfy->id); + + if (atomic_xchg(&ntfy->allowed, 1) == 0) { + nvkm_event_ntfy_state(ntfy); + if (ntfy->wait) + nvkm_event_ntfy_insert(ntfy); + } +} + +void +nvkm_event_ntfy_del(struct nvkm_event_ntfy *ntfy) +{ + struct nvkm_event *event = ntfy->event; + + if (!event) + return; + + nvkm_trace(event->subdev, "event: ntfy del %08x on %d\n", ntfy->bits, ntfy->id); + + nvkm_event_ntfy_block_(ntfy, false); + nvkm_event_ntfy_remove(ntfy); + ntfy->event = NULL; +} + +void +nvkm_event_ntfy_add(struct nvkm_event *event, int id, u32 bits, bool wait, nvkm_event_func func, + struct nvkm_event_ntfy *ntfy) +{ + nvkm_trace(event->subdev, "event: ntfy add %08x on %d wait:%d\n", id, bits, wait); + + ntfy->event = event; + ntfy->id = id; + ntfy->bits = bits; + ntfy->wait = wait; + ntfy->func = func; + atomic_set(&ntfy->allowed, 0); + ntfy->running = false; + INIT_LIST_HEAD(&ntfy->head); + if (!ntfy->wait) + nvkm_event_ntfy_insert(ntfy); +} + +bool +nvkm_event_ntfy_valid(struct nvkm_event *event, int id, u32 bits) +{ + return true; +} + +void +nvkm_event_ntfy(struct nvkm_event *event, int id, u32 bits) +{ + struct nvkm_event_ntfy *ntfy, *ntmp; + unsigned long flags; + + if (!event->refs || WARN_ON(id >= event->index_nr)) + return; + + nvkm_trace(event->subdev, "event: ntfy %08x on %d\n", bits, id); + spin_lock_irqsave(&event->list_lock, flags); + + list_for_each_entry_safe(ntfy, ntmp, &event->ntfy, head) { + if (ntfy->id == id && ntfy->bits & bits) { + if (atomic_read(&ntfy->allowed)) + ntfy->func(ntfy, ntfy->bits & bits); + } + } + + spin_unlock_irqrestore(&event->list_lock, flags); +} + +void +nvkm_event_fini(struct nvkm_event *event) +{ + if (event->refs) { + kfree(event->refs); + event->refs = NULL; + } +} + +int +__nvkm_event_init(const struct nvkm_event_func *func, struct nvkm_subdev *subdev, + int types_nr, int index_nr, struct nvkm_event *event) +{ + event->refs = kzalloc(array3_size(index_nr, types_nr, sizeof(*event->refs)), GFP_KERNEL); + if (!event->refs) + return -ENOMEM; + + event->func = func; + event->subdev = subdev; + event->types_nr = types_nr; + event->index_nr = index_nr; + INIT_LIST_HEAD(&event->ntfy); + return 0; +} -- cgit v1.2.3