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/amd/amdgpu/amdgpu_sync.c | 460 +++++++++++++++++++++++++++++++ 1 file changed, 460 insertions(+) create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c new file mode 100644 index 000000000..dcd8c066b --- /dev/null +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c @@ -0,0 +1,460 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright 2014 Advanced Micro Devices, Inc. + * All Rights Reserved. + * + * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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. + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + */ +/* + * Authors: + * Christian König + */ + +#include + +#include "amdgpu.h" +#include "amdgpu_trace.h" +#include "amdgpu_amdkfd.h" + +struct amdgpu_sync_entry { + struct hlist_node node; + struct dma_fence *fence; +}; + +static struct kmem_cache *amdgpu_sync_slab; + +/** + * amdgpu_sync_create - zero init sync object + * + * @sync: sync object to initialize + * + * Just clear the sync object for now. + */ +void amdgpu_sync_create(struct amdgpu_sync *sync) +{ + hash_init(sync->fences); +} + +/** + * amdgpu_sync_same_dev - test if fence belong to us + * + * @adev: amdgpu device to use for the test + * @f: fence to test + * + * Test if the fence was issued by us. + */ +static bool amdgpu_sync_same_dev(struct amdgpu_device *adev, + struct dma_fence *f) +{ + struct drm_sched_fence *s_fence = to_drm_sched_fence(f); + + if (s_fence) { + struct amdgpu_ring *ring; + + ring = container_of(s_fence->sched, struct amdgpu_ring, sched); + return ring->adev == adev; + } + + return false; +} + +/** + * amdgpu_sync_get_owner - extract the owner of a fence + * + * @f: fence get the owner from + * + * Extract who originally created the fence. + */ +static void *amdgpu_sync_get_owner(struct dma_fence *f) +{ + struct drm_sched_fence *s_fence; + struct amdgpu_amdkfd_fence *kfd_fence; + + if (!f) + return AMDGPU_FENCE_OWNER_UNDEFINED; + + s_fence = to_drm_sched_fence(f); + if (s_fence) + return s_fence->owner; + + kfd_fence = to_amdgpu_amdkfd_fence(f); + if (kfd_fence) + return AMDGPU_FENCE_OWNER_KFD; + + return AMDGPU_FENCE_OWNER_UNDEFINED; +} + +/** + * amdgpu_sync_keep_later - Keep the later fence + * + * @keep: existing fence to test + * @fence: new fence + * + * Either keep the existing fence or the new one, depending which one is later. + */ +static void amdgpu_sync_keep_later(struct dma_fence **keep, + struct dma_fence *fence) +{ + if (*keep && dma_fence_is_later(*keep, fence)) + return; + + dma_fence_put(*keep); + *keep = dma_fence_get(fence); +} + +/** + * amdgpu_sync_add_later - add the fence to the hash + * + * @sync: sync object to add the fence to + * @f: fence to add + * + * Tries to add the fence to an existing hash entry. Returns true when an entry + * was found, false otherwise. + */ +static bool amdgpu_sync_add_later(struct amdgpu_sync *sync, struct dma_fence *f) +{ + struct amdgpu_sync_entry *e; + + hash_for_each_possible(sync->fences, e, node, f->context) { + if (unlikely(e->fence->context != f->context)) + continue; + + amdgpu_sync_keep_later(&e->fence, f); + return true; + } + return false; +} + +/** + * amdgpu_sync_fence - remember to sync to this fence + * + * @sync: sync object to add fence to + * @f: fence to sync to + * + * Add the fence to the sync object. + */ +int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f) +{ + struct amdgpu_sync_entry *e; + + if (!f) + return 0; + + if (amdgpu_sync_add_later(sync, f)) + return 0; + + e = kmem_cache_alloc(amdgpu_sync_slab, GFP_KERNEL); + if (!e) + return -ENOMEM; + + hash_add(sync->fences, &e->node, f->context); + e->fence = dma_fence_get(f); + return 0; +} + +/* Determine based on the owner and mode if we should sync to a fence or not */ +static bool amdgpu_sync_test_fence(struct amdgpu_device *adev, + enum amdgpu_sync_mode mode, + void *owner, struct dma_fence *f) +{ + void *fence_owner = amdgpu_sync_get_owner(f); + + /* Always sync to moves, no matter what */ + if (fence_owner == AMDGPU_FENCE_OWNER_UNDEFINED) + return true; + + /* We only want to trigger KFD eviction fences on + * evict or move jobs. Skip KFD fences otherwise. + */ + if (fence_owner == AMDGPU_FENCE_OWNER_KFD && + owner != AMDGPU_FENCE_OWNER_UNDEFINED) + return false; + + /* Never sync to VM updates either. */ + if (fence_owner == AMDGPU_FENCE_OWNER_VM && + owner != AMDGPU_FENCE_OWNER_UNDEFINED) + return false; + + /* Ignore fences depending on the sync mode */ + switch (mode) { + case AMDGPU_SYNC_ALWAYS: + return true; + + case AMDGPU_SYNC_NE_OWNER: + if (amdgpu_sync_same_dev(adev, f) && + fence_owner == owner) + return false; + break; + + case AMDGPU_SYNC_EQ_OWNER: + if (amdgpu_sync_same_dev(adev, f) && + fence_owner != owner) + return false; + break; + + case AMDGPU_SYNC_EXPLICIT: + return false; + } + + WARN(debug_evictions && fence_owner == AMDGPU_FENCE_OWNER_KFD, + "Adding eviction fence to sync obj"); + return true; +} + +/** + * amdgpu_sync_resv - sync to a reservation object + * + * @adev: amdgpu device + * @sync: sync object to add fences from reservation object to + * @resv: reservation object with embedded fence + * @mode: how owner affects which fences we sync to + * @owner: owner of the planned job submission + * + * Sync to the fence + */ +int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync, + struct dma_resv *resv, enum amdgpu_sync_mode mode, + void *owner) +{ + struct dma_resv_iter cursor; + struct dma_fence *f; + int r; + + if (resv == NULL) + return -EINVAL; + + /* TODO: Use DMA_RESV_USAGE_READ here */ + dma_resv_for_each_fence(&cursor, resv, DMA_RESV_USAGE_BOOKKEEP, f) { + dma_fence_chain_for_each(f, f) { + struct dma_fence *tmp = dma_fence_chain_contained(f); + + if (amdgpu_sync_test_fence(adev, mode, owner, tmp)) { + r = amdgpu_sync_fence(sync, f); + dma_fence_put(f); + if (r) + return r; + break; + } + } + } + return 0; +} + +/* Free the entry back to the slab */ +static void amdgpu_sync_entry_free(struct amdgpu_sync_entry *e) +{ + hash_del(&e->node); + dma_fence_put(e->fence); + kmem_cache_free(amdgpu_sync_slab, e); +} + +/** + * amdgpu_sync_peek_fence - get the next fence not signaled yet + * + * @sync: the sync object + * @ring: optional ring to use for test + * + * Returns the next fence not signaled yet without removing it from the sync + * object. + */ +struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync, + struct amdgpu_ring *ring) +{ + struct amdgpu_sync_entry *e; + struct hlist_node *tmp; + int i; + + hash_for_each_safe(sync->fences, i, tmp, e, node) { + struct dma_fence *f = e->fence; + struct drm_sched_fence *s_fence = to_drm_sched_fence(f); + + if (dma_fence_is_signaled(f)) { + amdgpu_sync_entry_free(e); + continue; + } + if (ring && s_fence) { + /* For fences from the same ring it is sufficient + * when they are scheduled. + */ + if (s_fence->sched == &ring->sched) { + if (dma_fence_is_signaled(&s_fence->scheduled)) + continue; + + return &s_fence->scheduled; + } + } + + return f; + } + + return NULL; +} + +/** + * amdgpu_sync_get_fence - get the next fence from the sync object + * + * @sync: sync object to use + * + * Get and removes the next fence from the sync object not signaled yet. + */ +struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync) +{ + struct amdgpu_sync_entry *e; + struct hlist_node *tmp; + struct dma_fence *f; + int i; + + hash_for_each_safe(sync->fences, i, tmp, e, node) { + + f = e->fence; + + hash_del(&e->node); + kmem_cache_free(amdgpu_sync_slab, e); + + if (!dma_fence_is_signaled(f)) + return f; + + dma_fence_put(f); + } + return NULL; +} + +/** + * amdgpu_sync_clone - clone a sync object + * + * @source: sync object to clone + * @clone: pointer to destination sync object + * + * Adds references to all unsignaled fences in @source to @clone. Also + * removes signaled fences from @source while at it. + */ +int amdgpu_sync_clone(struct amdgpu_sync *source, struct amdgpu_sync *clone) +{ + struct amdgpu_sync_entry *e; + struct hlist_node *tmp; + struct dma_fence *f; + int i, r; + + hash_for_each_safe(source->fences, i, tmp, e, node) { + f = e->fence; + if (!dma_fence_is_signaled(f)) { + r = amdgpu_sync_fence(clone, f); + if (r) + return r; + } else { + amdgpu_sync_entry_free(e); + } + } + + return 0; +} + +/** + * amdgpu_sync_push_to_job - push fences into job + * @sync: sync object to get the fences from + * @job: job to push the fences into + * + * Add all unsignaled fences from sync to job. + */ +int amdgpu_sync_push_to_job(struct amdgpu_sync *sync, struct amdgpu_job *job) +{ + struct amdgpu_sync_entry *e; + struct hlist_node *tmp; + struct dma_fence *f; + int i, r; + + hash_for_each_safe(sync->fences, i, tmp, e, node) { + f = e->fence; + if (dma_fence_is_signaled(f)) { + amdgpu_sync_entry_free(e); + continue; + } + + dma_fence_get(f); + r = drm_sched_job_add_dependency(&job->base, f); + if (r) { + dma_fence_put(f); + return r; + } + } + return 0; +} + +int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr) +{ + struct amdgpu_sync_entry *e; + struct hlist_node *tmp; + int i, r; + + hash_for_each_safe(sync->fences, i, tmp, e, node) { + r = dma_fence_wait(e->fence, intr); + if (r) + return r; + + amdgpu_sync_entry_free(e); + } + + return 0; +} + +/** + * amdgpu_sync_free - free the sync object + * + * @sync: sync object to use + * + * Free the sync object. + */ +void amdgpu_sync_free(struct amdgpu_sync *sync) +{ + struct amdgpu_sync_entry *e; + struct hlist_node *tmp; + unsigned int i; + + hash_for_each_safe(sync->fences, i, tmp, e, node) + amdgpu_sync_entry_free(e); +} + +/** + * amdgpu_sync_init - init sync object subsystem + * + * Allocate the slab allocator. + */ +int amdgpu_sync_init(void) +{ + amdgpu_sync_slab = kmem_cache_create( + "amdgpu_sync", sizeof(struct amdgpu_sync_entry), 0, + SLAB_HWCACHE_ALIGN, NULL); + if (!amdgpu_sync_slab) + return -ENOMEM; + + return 0; +} + +/** + * amdgpu_sync_fini - fini sync object subsystem + * + * Free the slab allocator. + */ +void amdgpu_sync_fini(void) +{ + kmem_cache_destroy(amdgpu_sync_slab); +} -- cgit v1.2.3