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/ttm/ttm_device.c | 307 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 307 insertions(+) create mode 100644 drivers/gpu/drm/ttm/ttm_device.c (limited to 'drivers/gpu/drm/ttm/ttm_device.c') diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c new file mode 100644 index 000000000..e7147e304 --- /dev/null +++ b/drivers/gpu/drm/ttm/ttm_device.c @@ -0,0 +1,307 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ + +/* + * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA + * Copyright 2020 Advanced Micro Devices, 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: Christian König + */ + +#define pr_fmt(fmt) "[TTM DEVICE] " fmt + +#include + +#include +#include +#include +#include + +#include "ttm_module.h" + +/* + * ttm_global_mutex - protecting the global state + */ +static DEFINE_MUTEX(ttm_global_mutex); +static unsigned ttm_glob_use_count; +struct ttm_global ttm_glob; +EXPORT_SYMBOL(ttm_glob); + +struct dentry *ttm_debugfs_root; + +static void ttm_global_release(void) +{ + struct ttm_global *glob = &ttm_glob; + + mutex_lock(&ttm_global_mutex); + if (--ttm_glob_use_count > 0) + goto out; + + ttm_pool_mgr_fini(); + debugfs_remove(ttm_debugfs_root); + + __free_page(glob->dummy_read_page); + memset(glob, 0, sizeof(*glob)); +out: + mutex_unlock(&ttm_global_mutex); +} + +static int ttm_global_init(void) +{ + struct ttm_global *glob = &ttm_glob; + unsigned long num_pages, num_dma32; + struct sysinfo si; + int ret = 0; + + mutex_lock(&ttm_global_mutex); + if (++ttm_glob_use_count > 1) + goto out; + + si_meminfo(&si); + + ttm_debugfs_root = debugfs_create_dir("ttm", NULL); + if (IS_ERR(ttm_debugfs_root)) { + ttm_debugfs_root = NULL; + } + + /* Limit the number of pages in the pool to about 50% of the total + * system memory. + */ + num_pages = ((u64)si.totalram * si.mem_unit) >> PAGE_SHIFT; + num_pages /= 2; + + /* But for DMA32 we limit ourself to only use 2GiB maximum. */ + num_dma32 = (u64)(si.totalram - si.totalhigh) * si.mem_unit + >> PAGE_SHIFT; + num_dma32 = min(num_dma32, 2UL << (30 - PAGE_SHIFT)); + + ttm_pool_mgr_init(num_pages); + ttm_tt_mgr_init(num_pages, num_dma32); + + glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); + + if (unlikely(glob->dummy_read_page == NULL)) { + ret = -ENOMEM; + goto out; + } + + INIT_LIST_HEAD(&glob->device_list); + atomic_set(&glob->bo_count, 0); + + debugfs_create_atomic_t("buffer_objects", 0444, ttm_debugfs_root, + &glob->bo_count); +out: + if (ret && ttm_debugfs_root) + debugfs_remove(ttm_debugfs_root); + if (ret) + --ttm_glob_use_count; + mutex_unlock(&ttm_global_mutex); + return ret; +} + +/* + * A buffer object shrink method that tries to swap out the first + * buffer object on the global::swap_lru list. + */ +int ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t gfp_flags) +{ + struct ttm_global *glob = &ttm_glob; + struct ttm_device *bdev; + int ret = 0; + + mutex_lock(&ttm_global_mutex); + list_for_each_entry(bdev, &glob->device_list, device_list) { + ret = ttm_device_swapout(bdev, ctx, gfp_flags); + if (ret > 0) { + list_move_tail(&bdev->device_list, &glob->device_list); + break; + } + } + mutex_unlock(&ttm_global_mutex); + return ret; +} +EXPORT_SYMBOL(ttm_global_swapout); + +int ttm_device_swapout(struct ttm_device *bdev, struct ttm_operation_ctx *ctx, + gfp_t gfp_flags) +{ + struct ttm_resource_cursor cursor; + struct ttm_resource_manager *man; + struct ttm_resource *res; + unsigned i; + int ret; + + spin_lock(&bdev->lru_lock); + for (i = TTM_PL_SYSTEM; i < TTM_NUM_MEM_TYPES; ++i) { + man = ttm_manager_type(bdev, i); + if (!man || !man->use_tt) + continue; + + ttm_resource_manager_for_each_res(man, &cursor, res) { + struct ttm_buffer_object *bo = res->bo; + uint32_t num_pages; + + if (!bo) + continue; + + num_pages = PFN_UP(bo->base.size); + ret = ttm_bo_swapout(bo, ctx, gfp_flags); + /* ttm_bo_swapout has dropped the lru_lock */ + if (!ret) + return num_pages; + if (ret != -EBUSY) + return ret; + } + } + spin_unlock(&bdev->lru_lock); + return 0; +} +EXPORT_SYMBOL(ttm_device_swapout); + +static void ttm_device_delayed_workqueue(struct work_struct *work) +{ + struct ttm_device *bdev = + container_of(work, struct ttm_device, wq.work); + + if (!ttm_bo_delayed_delete(bdev, false)) + schedule_delayed_work(&bdev->wq, + ((HZ / 100) < 1) ? 1 : HZ / 100); +} + +/** + * ttm_device_init + * + * @bdev: A pointer to a struct ttm_device to initialize. + * @funcs: Function table for the device. + * @dev: The core kernel device pointer for DMA mappings and allocations. + * @mapping: The address space to use for this bo. + * @vma_manager: A pointer to a vma manager. + * @use_dma_alloc: If coherent DMA allocation API should be used. + * @use_dma32: If we should use GFP_DMA32 for device memory allocations. + * + * Initializes a struct ttm_device: + * Returns: + * !0: Failure. + */ +int ttm_device_init(struct ttm_device *bdev, struct ttm_device_funcs *funcs, + struct device *dev, struct address_space *mapping, + struct drm_vma_offset_manager *vma_manager, + bool use_dma_alloc, bool use_dma32) +{ + struct ttm_global *glob = &ttm_glob; + int ret; + + if (WARN_ON(vma_manager == NULL)) + return -EINVAL; + + ret = ttm_global_init(); + if (ret) + return ret; + + bdev->funcs = funcs; + + ttm_sys_man_init(bdev); + ttm_pool_init(&bdev->pool, dev, use_dma_alloc, use_dma32); + + bdev->vma_manager = vma_manager; + INIT_DELAYED_WORK(&bdev->wq, ttm_device_delayed_workqueue); + spin_lock_init(&bdev->lru_lock); + INIT_LIST_HEAD(&bdev->ddestroy); + INIT_LIST_HEAD(&bdev->pinned); + bdev->dev_mapping = mapping; + mutex_lock(&ttm_global_mutex); + list_add_tail(&bdev->device_list, &glob->device_list); + mutex_unlock(&ttm_global_mutex); + + return 0; +} +EXPORT_SYMBOL(ttm_device_init); + +void ttm_device_fini(struct ttm_device *bdev) +{ + struct ttm_resource_manager *man; + unsigned i; + + man = ttm_manager_type(bdev, TTM_PL_SYSTEM); + ttm_resource_manager_set_used(man, false); + ttm_set_driver_manager(bdev, TTM_PL_SYSTEM, NULL); + + mutex_lock(&ttm_global_mutex); + list_del(&bdev->device_list); + mutex_unlock(&ttm_global_mutex); + + cancel_delayed_work_sync(&bdev->wq); + + if (ttm_bo_delayed_delete(bdev, true)) + pr_debug("Delayed destroy list was clean\n"); + + spin_lock(&bdev->lru_lock); + for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) + if (list_empty(&man->lru[0])) + pr_debug("Swap list %d was clean\n", i); + spin_unlock(&bdev->lru_lock); + + ttm_pool_fini(&bdev->pool); + ttm_global_release(); +} +EXPORT_SYMBOL(ttm_device_fini); + +static void ttm_device_clear_lru_dma_mappings(struct ttm_device *bdev, + struct list_head *list) +{ + struct ttm_resource *res; + + spin_lock(&bdev->lru_lock); + while ((res = list_first_entry_or_null(list, typeof(*res), lru))) { + struct ttm_buffer_object *bo = res->bo; + + /* Take ref against racing releases once lru_lock is unlocked */ + if (!ttm_bo_get_unless_zero(bo)) + continue; + + list_del_init(&res->lru); + spin_unlock(&bdev->lru_lock); + + if (bo->ttm) + ttm_tt_unpopulate(bo->bdev, bo->ttm); + + ttm_bo_put(bo); + spin_lock(&bdev->lru_lock); + } + spin_unlock(&bdev->lru_lock); +} + +void ttm_device_clear_dma_mappings(struct ttm_device *bdev) +{ + struct ttm_resource_manager *man; + unsigned int i, j; + + ttm_device_clear_lru_dma_mappings(bdev, &bdev->pinned); + + for (i = TTM_PL_SYSTEM; i < TTM_NUM_MEM_TYPES; ++i) { + man = ttm_manager_type(bdev, i); + if (!man || !man->use_tt) + continue; + + for (j = 0; j < TTM_MAX_BO_PRIORITY; ++j) + ttm_device_clear_lru_dma_mappings(bdev, &man->lru[j]); + } +} +EXPORT_SYMBOL(ttm_device_clear_dma_mappings); -- cgit v1.2.3