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/net/ethernet/mellanox/mlx5/core/alloc.c | 250 ++++++++++++++++++++++++ 1 file changed, 250 insertions(+) create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/alloc.c (limited to 'drivers/net/ethernet/mellanox/mlx5/core/alloc.c') diff --git a/drivers/net/ethernet/mellanox/mlx5/core/alloc.c b/drivers/net/ethernet/mellanox/mlx5/core/alloc.c new file mode 100644 index 000000000..6aca004e8 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/alloc.c @@ -0,0 +1,250 @@ +/* + * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * 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 AUTHORS OR COPYRIGHT HOLDERS + * 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 +#include +#include +#include +#include +#include +#include + +#include "mlx5_core.h" + +struct mlx5_db_pgdir { + struct list_head list; + unsigned long *bitmap; + __be32 *db_page; + dma_addr_t db_dma; +}; + +/* Handling for queue buffers -- we allocate a bunch of memory and + * register it in a memory region at HCA virtual address 0. + */ + +static void *mlx5_dma_zalloc_coherent_node(struct mlx5_core_dev *dev, + size_t size, dma_addr_t *dma_handle, + int node) +{ + struct device *device = mlx5_core_dma_dev(dev); + struct mlx5_priv *priv = &dev->priv; + int original_node; + void *cpu_handle; + + mutex_lock(&priv->alloc_mutex); + original_node = dev_to_node(device); + set_dev_node(device, node); + cpu_handle = dma_alloc_coherent(device, size, dma_handle, + GFP_KERNEL); + set_dev_node(device, original_node); + mutex_unlock(&priv->alloc_mutex); + return cpu_handle; +} + +int mlx5_frag_buf_alloc_node(struct mlx5_core_dev *dev, int size, + struct mlx5_frag_buf *buf, int node) +{ + int i; + + buf->size = size; + buf->npages = DIV_ROUND_UP(size, PAGE_SIZE); + buf->page_shift = PAGE_SHIFT; + buf->frags = kcalloc(buf->npages, sizeof(struct mlx5_buf_list), + GFP_KERNEL); + if (!buf->frags) + goto err_out; + + for (i = 0; i < buf->npages; i++) { + struct mlx5_buf_list *frag = &buf->frags[i]; + int frag_sz = min_t(int, size, PAGE_SIZE); + + frag->buf = mlx5_dma_zalloc_coherent_node(dev, frag_sz, + &frag->map, node); + if (!frag->buf) + goto err_free_buf; + if (frag->map & ((1 << buf->page_shift) - 1)) { + dma_free_coherent(mlx5_core_dma_dev(dev), frag_sz, + buf->frags[i].buf, buf->frags[i].map); + mlx5_core_warn(dev, "unexpected map alignment: %pad, page_shift=%d\n", + &frag->map, buf->page_shift); + goto err_free_buf; + } + size -= frag_sz; + } + + return 0; + +err_free_buf: + while (i--) + dma_free_coherent(mlx5_core_dma_dev(dev), PAGE_SIZE, buf->frags[i].buf, + buf->frags[i].map); + kfree(buf->frags); +err_out: + return -ENOMEM; +} +EXPORT_SYMBOL_GPL(mlx5_frag_buf_alloc_node); + +void mlx5_frag_buf_free(struct mlx5_core_dev *dev, struct mlx5_frag_buf *buf) +{ + int size = buf->size; + int i; + + for (i = 0; i < buf->npages; i++) { + int frag_sz = min_t(int, size, PAGE_SIZE); + + dma_free_coherent(mlx5_core_dma_dev(dev), frag_sz, buf->frags[i].buf, + buf->frags[i].map); + size -= frag_sz; + } + kfree(buf->frags); +} +EXPORT_SYMBOL_GPL(mlx5_frag_buf_free); + +static struct mlx5_db_pgdir *mlx5_alloc_db_pgdir(struct mlx5_core_dev *dev, + int node) +{ + u32 db_per_page = PAGE_SIZE / cache_line_size(); + struct mlx5_db_pgdir *pgdir; + + pgdir = kzalloc_node(sizeof(*pgdir), GFP_KERNEL, node); + if (!pgdir) + return NULL; + + pgdir->bitmap = bitmap_zalloc_node(db_per_page, GFP_KERNEL, node); + if (!pgdir->bitmap) { + kfree(pgdir); + return NULL; + } + + bitmap_fill(pgdir->bitmap, db_per_page); + + pgdir->db_page = mlx5_dma_zalloc_coherent_node(dev, PAGE_SIZE, + &pgdir->db_dma, node); + if (!pgdir->db_page) { + bitmap_free(pgdir->bitmap); + kfree(pgdir); + return NULL; + } + + return pgdir; +} + +static int mlx5_alloc_db_from_pgdir(struct mlx5_db_pgdir *pgdir, + struct mlx5_db *db) +{ + u32 db_per_page = PAGE_SIZE / cache_line_size(); + int offset; + int i; + + i = find_first_bit(pgdir->bitmap, db_per_page); + if (i >= db_per_page) + return -ENOMEM; + + __clear_bit(i, pgdir->bitmap); + + db->u.pgdir = pgdir; + db->index = i; + offset = db->index * cache_line_size(); + db->db = pgdir->db_page + offset / sizeof(*pgdir->db_page); + db->dma = pgdir->db_dma + offset; + + db->db[0] = 0; + db->db[1] = 0; + + return 0; +} + +int mlx5_db_alloc_node(struct mlx5_core_dev *dev, struct mlx5_db *db, int node) +{ + struct mlx5_db_pgdir *pgdir; + int ret = 0; + + mutex_lock(&dev->priv.pgdir_mutex); + + list_for_each_entry(pgdir, &dev->priv.pgdir_list, list) + if (!mlx5_alloc_db_from_pgdir(pgdir, db)) + goto out; + + pgdir = mlx5_alloc_db_pgdir(dev, node); + if (!pgdir) { + ret = -ENOMEM; + goto out; + } + + list_add(&pgdir->list, &dev->priv.pgdir_list); + + /* This should never fail -- we just allocated an empty page: */ + WARN_ON(mlx5_alloc_db_from_pgdir(pgdir, db)); + +out: + mutex_unlock(&dev->priv.pgdir_mutex); + + return ret; +} +EXPORT_SYMBOL_GPL(mlx5_db_alloc_node); + +void mlx5_db_free(struct mlx5_core_dev *dev, struct mlx5_db *db) +{ + u32 db_per_page = PAGE_SIZE / cache_line_size(); + + mutex_lock(&dev->priv.pgdir_mutex); + + __set_bit(db->index, db->u.pgdir->bitmap); + + if (bitmap_full(db->u.pgdir->bitmap, db_per_page)) { + dma_free_coherent(mlx5_core_dma_dev(dev), PAGE_SIZE, + db->u.pgdir->db_page, db->u.pgdir->db_dma); + list_del(&db->u.pgdir->list); + bitmap_free(db->u.pgdir->bitmap); + kfree(db->u.pgdir); + } + + mutex_unlock(&dev->priv.pgdir_mutex); +} +EXPORT_SYMBOL_GPL(mlx5_db_free); + +void mlx5_fill_page_frag_array_perm(struct mlx5_frag_buf *buf, __be64 *pas, u8 perm) +{ + int i; + + WARN_ON(perm & 0xfc); + for (i = 0; i < buf->npages; i++) + pas[i] = cpu_to_be64(buf->frags[i].map | perm); +} +EXPORT_SYMBOL_GPL(mlx5_fill_page_frag_array_perm); + +void mlx5_fill_page_frag_array(struct mlx5_frag_buf *buf, __be64 *pas) +{ + mlx5_fill_page_frag_array_perm(buf, pas, 0); +} +EXPORT_SYMBOL_GPL(mlx5_fill_page_frag_array); -- cgit v1.2.3