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/mm.c | 307 +++++++++++++++++++++++++++++++++ 1 file changed, 307 insertions(+) create mode 100644 drivers/gpu/drm/nouveau/nvkm/core/mm.c (limited to 'drivers/gpu/drm/nouveau/nvkm/core/mm.c') diff --git a/drivers/gpu/drm/nouveau/nvkm/core/mm.c b/drivers/gpu/drm/nouveau/nvkm/core/mm.c new file mode 100644 index 000000000..f78a06a6b --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/core/mm.c @@ -0,0 +1,307 @@ +/* + * Copyright 2012 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. + * + * Authors: Ben Skeggs + */ +#include + +#define node(root, dir) ((root)->nl_entry.dir == &mm->nodes) ? NULL : \ + list_entry((root)->nl_entry.dir, struct nvkm_mm_node, nl_entry) + +void +nvkm_mm_dump(struct nvkm_mm *mm, const char *header) +{ + struct nvkm_mm_node *node; + + pr_err("nvkm: %s\n", header); + pr_err("nvkm: node list:\n"); + list_for_each_entry(node, &mm->nodes, nl_entry) { + pr_err("nvkm: \t%08x %08x %d\n", + node->offset, node->length, node->type); + } + pr_err("nvkm: free list:\n"); + list_for_each_entry(node, &mm->free, fl_entry) { + pr_err("nvkm: \t%08x %08x %d\n", + node->offset, node->length, node->type); + } +} + +void +nvkm_mm_free(struct nvkm_mm *mm, struct nvkm_mm_node **pthis) +{ + struct nvkm_mm_node *this = *pthis; + + if (this) { + struct nvkm_mm_node *prev = node(this, prev); + struct nvkm_mm_node *next = node(this, next); + + if (prev && prev->type == NVKM_MM_TYPE_NONE) { + prev->length += this->length; + list_del(&this->nl_entry); + kfree(this); this = prev; + } + + if (next && next->type == NVKM_MM_TYPE_NONE) { + next->offset = this->offset; + next->length += this->length; + if (this->type == NVKM_MM_TYPE_NONE) + list_del(&this->fl_entry); + list_del(&this->nl_entry); + kfree(this); this = NULL; + } + + if (this && this->type != NVKM_MM_TYPE_NONE) { + list_for_each_entry(prev, &mm->free, fl_entry) { + if (this->offset < prev->offset) + break; + } + + list_add_tail(&this->fl_entry, &prev->fl_entry); + this->type = NVKM_MM_TYPE_NONE; + } + } + + *pthis = NULL; +} + +static struct nvkm_mm_node * +region_head(struct nvkm_mm *mm, struct nvkm_mm_node *a, u32 size) +{ + struct nvkm_mm_node *b; + + if (a->length == size) + return a; + + b = kmalloc(sizeof(*b), GFP_KERNEL); + if (unlikely(b == NULL)) + return NULL; + + b->offset = a->offset; + b->length = size; + b->heap = a->heap; + b->type = a->type; + a->offset += size; + a->length -= size; + list_add_tail(&b->nl_entry, &a->nl_entry); + if (b->type == NVKM_MM_TYPE_NONE) + list_add_tail(&b->fl_entry, &a->fl_entry); + + return b; +} + +int +nvkm_mm_head(struct nvkm_mm *mm, u8 heap, u8 type, u32 size_max, u32 size_min, + u32 align, struct nvkm_mm_node **pnode) +{ + struct nvkm_mm_node *prev, *this, *next; + u32 mask = align - 1; + u32 splitoff; + u32 s, e; + + BUG_ON(type == NVKM_MM_TYPE_NONE || type == NVKM_MM_TYPE_HOLE); + + list_for_each_entry(this, &mm->free, fl_entry) { + if (unlikely(heap != NVKM_MM_HEAP_ANY)) { + if (this->heap != heap) + continue; + } + e = this->offset + this->length; + s = this->offset; + + prev = node(this, prev); + if (prev && prev->type != type) + s = roundup(s, mm->block_size); + + next = node(this, next); + if (next && next->type != type) + e = rounddown(e, mm->block_size); + + s = (s + mask) & ~mask; + e &= ~mask; + if (s > e || e - s < size_min) + continue; + + splitoff = s - this->offset; + if (splitoff && !region_head(mm, this, splitoff)) + return -ENOMEM; + + this = region_head(mm, this, min(size_max, e - s)); + if (!this) + return -ENOMEM; + + this->next = NULL; + this->type = type; + list_del(&this->fl_entry); + *pnode = this; + return 0; + } + + return -ENOSPC; +} + +static struct nvkm_mm_node * +region_tail(struct nvkm_mm *mm, struct nvkm_mm_node *a, u32 size) +{ + struct nvkm_mm_node *b; + + if (a->length == size) + return a; + + b = kmalloc(sizeof(*b), GFP_KERNEL); + if (unlikely(b == NULL)) + return NULL; + + a->length -= size; + b->offset = a->offset + a->length; + b->length = size; + b->heap = a->heap; + b->type = a->type; + + list_add(&b->nl_entry, &a->nl_entry); + if (b->type == NVKM_MM_TYPE_NONE) + list_add(&b->fl_entry, &a->fl_entry); + + return b; +} + +int +nvkm_mm_tail(struct nvkm_mm *mm, u8 heap, u8 type, u32 size_max, u32 size_min, + u32 align, struct nvkm_mm_node **pnode) +{ + struct nvkm_mm_node *prev, *this, *next; + u32 mask = align - 1; + + BUG_ON(type == NVKM_MM_TYPE_NONE || type == NVKM_MM_TYPE_HOLE); + + list_for_each_entry_reverse(this, &mm->free, fl_entry) { + u32 e = this->offset + this->length; + u32 s = this->offset; + u32 c = 0, a; + if (unlikely(heap != NVKM_MM_HEAP_ANY)) { + if (this->heap != heap) + continue; + } + + prev = node(this, prev); + if (prev && prev->type != type) + s = roundup(s, mm->block_size); + + next = node(this, next); + if (next && next->type != type) { + e = rounddown(e, mm->block_size); + c = next->offset - e; + } + + s = (s + mask) & ~mask; + a = e - s; + if (s > e || a < size_min) + continue; + + a = min(a, size_max); + s = (e - a) & ~mask; + c += (e - s) - a; + + if (c && !region_tail(mm, this, c)) + return -ENOMEM; + + this = region_tail(mm, this, a); + if (!this) + return -ENOMEM; + + this->next = NULL; + this->type = type; + list_del(&this->fl_entry); + *pnode = this; + return 0; + } + + return -ENOSPC; +} + +int +nvkm_mm_init(struct nvkm_mm *mm, u8 heap, u32 offset, u32 length, u32 block) +{ + struct nvkm_mm_node *node, *prev; + u32 next; + + if (nvkm_mm_initialised(mm)) { + prev = list_last_entry(&mm->nodes, typeof(*node), nl_entry); + next = prev->offset + prev->length; + if (next != offset) { + BUG_ON(next > offset); + if (!(node = kzalloc(sizeof(*node), GFP_KERNEL))) + return -ENOMEM; + node->type = NVKM_MM_TYPE_HOLE; + node->offset = next; + node->length = offset - next; + list_add_tail(&node->nl_entry, &mm->nodes); + } + BUG_ON(block != mm->block_size); + } else { + INIT_LIST_HEAD(&mm->nodes); + INIT_LIST_HEAD(&mm->free); + mm->block_size = block; + mm->heap_nodes = 0; + } + + node = kzalloc(sizeof(*node), GFP_KERNEL); + if (!node) + return -ENOMEM; + + if (length) { + node->offset = roundup(offset, mm->block_size); + node->length = rounddown(offset + length, mm->block_size); + node->length -= node->offset; + } + + list_add_tail(&node->nl_entry, &mm->nodes); + list_add_tail(&node->fl_entry, &mm->free); + node->heap = heap; + mm->heap_nodes++; + return 0; +} + +int +nvkm_mm_fini(struct nvkm_mm *mm) +{ + struct nvkm_mm_node *node, *temp; + int nodes = 0; + + if (!nvkm_mm_initialised(mm)) + return 0; + + list_for_each_entry(node, &mm->nodes, nl_entry) { + if (node->type != NVKM_MM_TYPE_HOLE) { + if (++nodes > mm->heap_nodes) { + nvkm_mm_dump(mm, "mm not clean!"); + return -EBUSY; + } + } + } + + list_for_each_entry_safe(node, temp, &mm->nodes, nl_entry) { + list_del(&node->nl_entry); + kfree(node); + } + + mm->heap_nodes = 0; + return 0; +} -- cgit v1.2.3