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/engine/fifo/runl.c | 430 ++++++++++++++++++++++++ 1 file changed, 430 insertions(+) create mode 100644 drivers/gpu/drm/nouveau/nvkm/engine/fifo/runl.c (limited to 'drivers/gpu/drm/nouveau/nvkm/engine/fifo/runl.c') diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/runl.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/runl.c new file mode 100644 index 000000000..b5836cbc2 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/runl.c @@ -0,0 +1,430 @@ +/* + * Copyright 2021 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 "runl.h" +#include "cgrp.h" +#include "chan.h" +#include "chid.h" +#include "priv.h" +#include "runq.h" + +#include +#include +#include + +struct nvkm_cgrp * +nvkm_engn_cgrp_get(struct nvkm_engn *engn, unsigned long *pirqflags) +{ + struct nvkm_cgrp *cgrp = NULL; + struct nvkm_chan *chan; + bool cgid; + int id; + + id = engn->func->cxid(engn, &cgid); + if (id < 0) + return NULL; + + if (!cgid) { + chan = nvkm_runl_chan_get_chid(engn->runl, id, pirqflags); + if (chan) + cgrp = chan->cgrp; + } else { + cgrp = nvkm_runl_cgrp_get_cgid(engn->runl, id, pirqflags); + } + + WARN_ON(!cgrp); + return cgrp; +} + +static void +nvkm_runl_rc(struct nvkm_runl *runl) +{ + struct nvkm_fifo *fifo = runl->fifo; + struct nvkm_cgrp *cgrp, *gtmp; + struct nvkm_chan *chan, *ctmp; + struct nvkm_engn *engn; + unsigned long flags; + int rc, state, i; + bool reset; + + /* Runlist is blocked before scheduling recovery - fetch count. */ + BUG_ON(!mutex_is_locked(&runl->mutex)); + rc = atomic_xchg(&runl->rc_pending, 0); + if (!rc) + return; + + /* Look for channel groups flagged for RC. */ + nvkm_runl_foreach_cgrp_safe(cgrp, gtmp, runl) { + state = atomic_cmpxchg(&cgrp->rc, NVKM_CGRP_RC_PENDING, NVKM_CGRP_RC_RUNNING); + if (state == NVKM_CGRP_RC_PENDING) { + /* Disable all channels in them, and remove from runlist. */ + nvkm_cgrp_foreach_chan_safe(chan, ctmp, cgrp) { + nvkm_chan_error(chan, false); + nvkm_chan_remove_locked(chan); + } + } + } + + /* On GPUs with runlist preempt, wait for PBDMA(s) servicing runlist to go idle. */ + if (runl->func->preempt) { + for (i = 0; i < runl->runq_nr; i++) { + struct nvkm_runq *runq = runl->runq[i]; + + if (runq) { + nvkm_msec(fifo->engine.subdev.device, 2000, + if (runq->func->idle(runq)) + break; + ); + } + } + } + + /* Look for engines that are still on flagged channel groups - reset them. */ + nvkm_runl_foreach_engn_cond(engn, runl, engn->func->cxid) { + cgrp = nvkm_engn_cgrp_get(engn, &flags); + if (!cgrp) { + ENGN_DEBUG(engn, "cxid not valid"); + continue; + } + + reset = atomic_read(&cgrp->rc) == NVKM_CGRP_RC_RUNNING; + nvkm_cgrp_put(&cgrp, flags); + if (!reset) { + ENGN_DEBUG(engn, "cxid not in recovery"); + continue; + } + + ENGN_DEBUG(engn, "resetting..."); + /*TODO: can we do something less of a potential catastrophe on failure? */ + WARN_ON(nvkm_engine_reset(engn->engine)); + } + + /* Submit runlist update, and clear any remaining exception state. */ + runl->func->update(runl); + if (runl->func->fault_clear) + runl->func->fault_clear(runl); + + /* Unblock runlist processing. */ + while (rc--) + nvkm_runl_allow(runl); + runl->func->wait(runl); +} + +static void +nvkm_runl_rc_runl(struct nvkm_runl *runl) +{ + RUNL_ERROR(runl, "rc scheduled"); + + nvkm_runl_block(runl); + if (runl->func->preempt) + runl->func->preempt(runl); + + atomic_inc(&runl->rc_pending); + schedule_work(&runl->work); +} + +void +nvkm_runl_rc_cgrp(struct nvkm_cgrp *cgrp) +{ + if (atomic_cmpxchg(&cgrp->rc, NVKM_CGRP_RC_NONE, NVKM_CGRP_RC_PENDING) != NVKM_CGRP_RC_NONE) + return; + + CGRP_ERROR(cgrp, "rc scheduled"); + nvkm_runl_rc_runl(cgrp->runl); +} + +void +nvkm_runl_rc_engn(struct nvkm_runl *runl, struct nvkm_engn *engn) +{ + struct nvkm_cgrp *cgrp; + unsigned long flags; + + /* Lookup channel group currently on engine. */ + cgrp = nvkm_engn_cgrp_get(engn, &flags); + if (!cgrp) { + ENGN_DEBUG(engn, "rc skipped, not on channel"); + return; + } + + nvkm_runl_rc_cgrp(cgrp); + nvkm_cgrp_put(&cgrp, flags); +} + +static void +nvkm_runl_work(struct work_struct *work) +{ + struct nvkm_runl *runl = container_of(work, typeof(*runl), work); + + mutex_lock(&runl->mutex); + nvkm_runl_rc(runl); + mutex_unlock(&runl->mutex); + +} + +struct nvkm_chan * +nvkm_runl_chan_get_inst(struct nvkm_runl *runl, u64 inst, unsigned long *pirqflags) +{ + struct nvkm_chid *chid = runl->chid; + struct nvkm_chan *chan; + unsigned long flags; + int id; + + spin_lock_irqsave(&chid->lock, flags); + for_each_set_bit(id, chid->used, chid->nr) { + chan = chid->data[id]; + if (likely(chan)) { + if (chan->inst->addr == inst) { + spin_lock(&chan->cgrp->lock); + *pirqflags = flags; + spin_unlock(&chid->lock); + return chan; + } + } + } + spin_unlock_irqrestore(&chid->lock, flags); + return NULL; +} + +struct nvkm_chan * +nvkm_runl_chan_get_chid(struct nvkm_runl *runl, int id, unsigned long *pirqflags) +{ + struct nvkm_chid *chid = runl->chid; + struct nvkm_chan *chan; + unsigned long flags; + + spin_lock_irqsave(&chid->lock, flags); + if (!WARN_ON(id >= chid->nr)) { + chan = chid->data[id]; + if (likely(chan)) { + spin_lock(&chan->cgrp->lock); + *pirqflags = flags; + spin_unlock(&chid->lock); + return chan; + } + } + spin_unlock_irqrestore(&chid->lock, flags); + return NULL; +} + +struct nvkm_cgrp * +nvkm_runl_cgrp_get_cgid(struct nvkm_runl *runl, int id, unsigned long *pirqflags) +{ + struct nvkm_chid *cgid = runl->cgid; + struct nvkm_cgrp *cgrp; + unsigned long flags; + + spin_lock_irqsave(&cgid->lock, flags); + if (!WARN_ON(id >= cgid->nr)) { + cgrp = cgid->data[id]; + if (likely(cgrp)) { + spin_lock(&cgrp->lock); + *pirqflags = flags; + spin_unlock(&cgid->lock); + return cgrp; + } + } + spin_unlock_irqrestore(&cgid->lock, flags); + return NULL; +} + +int +nvkm_runl_preempt_wait(struct nvkm_runl *runl) +{ + return nvkm_msec(runl->fifo->engine.subdev.device, runl->fifo->timeout.chan_msec, + if (!runl->func->preempt_pending(runl)) + break; + + nvkm_runl_rc(runl); + usleep_range(1, 2); + ) < 0 ? -ETIMEDOUT : 0; +} + +bool +nvkm_runl_update_pending(struct nvkm_runl *runl) +{ + if (!runl->func->pending(runl)) + return false; + + nvkm_runl_rc(runl); + return true; +} + +void +nvkm_runl_update_locked(struct nvkm_runl *runl, bool wait) +{ + if (atomic_xchg(&runl->changed, 0) && runl->func->update) { + runl->func->update(runl); + if (wait) + runl->func->wait(runl); + } +} + +void +nvkm_runl_allow(struct nvkm_runl *runl) +{ + struct nvkm_fifo *fifo = runl->fifo; + unsigned long flags; + + spin_lock_irqsave(&fifo->lock, flags); + if (!--runl->blocked) { + RUNL_TRACE(runl, "running"); + runl->func->allow(runl, ~0); + } + spin_unlock_irqrestore(&fifo->lock, flags); +} + +void +nvkm_runl_block(struct nvkm_runl *runl) +{ + struct nvkm_fifo *fifo = runl->fifo; + unsigned long flags; + + spin_lock_irqsave(&fifo->lock, flags); + if (!runl->blocked++) { + RUNL_TRACE(runl, "stopped"); + runl->func->block(runl, ~0); + } + spin_unlock_irqrestore(&fifo->lock, flags); +} + +void +nvkm_runl_fini(struct nvkm_runl *runl) +{ + if (runl->func->fini) + runl->func->fini(runl); + + flush_work(&runl->work); +} + +void +nvkm_runl_del(struct nvkm_runl *runl) +{ + struct nvkm_engn *engn, *engt; + + nvkm_memory_unref(&runl->mem); + + list_for_each_entry_safe(engn, engt, &runl->engns, head) { + list_del(&engn->head); + kfree(engn); + } + + nvkm_chid_unref(&runl->chid); + nvkm_chid_unref(&runl->cgid); + + list_del(&runl->head); + mutex_destroy(&runl->mutex); + kfree(runl); +} + +struct nvkm_engn * +nvkm_runl_add(struct nvkm_runl *runl, int engi, const struct nvkm_engn_func *func, + enum nvkm_subdev_type type, int inst) +{ + struct nvkm_fifo *fifo = runl->fifo; + struct nvkm_device *device = fifo->engine.subdev.device; + struct nvkm_engine *engine; + struct nvkm_engn *engn; + + engine = nvkm_device_engine(device, type, inst); + if (!engine) { + RUNL_DEBUG(runl, "engn %d.%d[%s] not found", engi, inst, nvkm_subdev_type[type]); + return NULL; + } + + if (!(engn = kzalloc(sizeof(*engn), GFP_KERNEL))) + return NULL; + + engn->func = func; + engn->runl = runl; + engn->id = engi; + engn->engine = engine; + engn->fault = -1; + list_add_tail(&engn->head, &runl->engns); + + /* Lookup MMU engine ID for fault handling. */ + if (device->top) + engn->fault = nvkm_top_fault_id(device, engine->subdev.type, engine->subdev.inst); + + if (engn->fault < 0 && fifo->func->mmu_fault) { + const struct nvkm_enum *map = fifo->func->mmu_fault->engine; + + while (map->name) { + if (map->data2 == engine->subdev.type && map->inst == engine->subdev.inst) { + engn->fault = map->value; + break; + } + map++; + } + } + + return engn; +} + +struct nvkm_runl * +nvkm_runl_get(struct nvkm_fifo *fifo, int runi, u32 addr) +{ + struct nvkm_runl *runl; + + nvkm_runl_foreach(runl, fifo) { + if ((runi >= 0 && runl->id == runi) || (runi < 0 && runl->addr == addr)) + return runl; + } + + return NULL; +} + +struct nvkm_runl * +nvkm_runl_new(struct nvkm_fifo *fifo, int runi, u32 addr, int id_nr) +{ + struct nvkm_subdev *subdev = &fifo->engine.subdev; + struct nvkm_runl *runl; + int ret; + + if (!(runl = kzalloc(sizeof(*runl), GFP_KERNEL))) + return NULL; + + runl->func = fifo->func->runl; + runl->fifo = fifo; + runl->id = runi; + runl->addr = addr; + INIT_LIST_HEAD(&runl->engns); + INIT_LIST_HEAD(&runl->cgrps); + atomic_set(&runl->changed, 0); + mutex_init(&runl->mutex); + INIT_WORK(&runl->work, nvkm_runl_work); + atomic_set(&runl->rc_triggered, 0); + atomic_set(&runl->rc_pending, 0); + list_add_tail(&runl->head, &fifo->runls); + + if (!fifo->chid) { + if ((ret = nvkm_chid_new(&nvkm_chan_event, subdev, id_nr, 0, id_nr, &runl->cgid)) || + (ret = nvkm_chid_new(&nvkm_chan_event, subdev, id_nr, 0, id_nr, &runl->chid))) { + RUNL_ERROR(runl, "cgid/chid: %d", ret); + nvkm_runl_del(runl); + return NULL; + } + } else { + runl->cgid = nvkm_chid_ref(fifo->cgid); + runl->chid = nvkm_chid_ref(fifo->chid); + } + + return runl; +} -- cgit v1.2.3