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/iommu/s390-iommu.c | 451 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 451 insertions(+) create mode 100644 drivers/iommu/s390-iommu.c (limited to 'drivers/iommu/s390-iommu.c') diff --git a/drivers/iommu/s390-iommu.c b/drivers/iommu/s390-iommu.c new file mode 100644 index 000000000..ed33c6cce --- /dev/null +++ b/drivers/iommu/s390-iommu.c @@ -0,0 +1,451 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * IOMMU API for s390 PCI devices + * + * Copyright IBM Corp. 2015 + * Author(s): Gerald Schaefer + */ + +#include +#include +#include +#include +#include +#include +#include + +static const struct iommu_ops s390_iommu_ops; + +struct s390_domain { + struct iommu_domain domain; + struct list_head devices; + unsigned long *dma_table; + spinlock_t list_lock; + struct rcu_head rcu; +}; + +static struct s390_domain *to_s390_domain(struct iommu_domain *dom) +{ + return container_of(dom, struct s390_domain, domain); +} + +static bool s390_iommu_capable(struct device *dev, enum iommu_cap cap) +{ + switch (cap) { + case IOMMU_CAP_CACHE_COHERENCY: + return true; + case IOMMU_CAP_INTR_REMAP: + return true; + default: + return false; + } +} + +static struct iommu_domain *s390_domain_alloc(unsigned domain_type) +{ + struct s390_domain *s390_domain; + + if (domain_type != IOMMU_DOMAIN_UNMANAGED) + return NULL; + + s390_domain = kzalloc(sizeof(*s390_domain), GFP_KERNEL); + if (!s390_domain) + return NULL; + + s390_domain->dma_table = dma_alloc_cpu_table(); + if (!s390_domain->dma_table) { + kfree(s390_domain); + return NULL; + } + s390_domain->domain.geometry.force_aperture = true; + s390_domain->domain.geometry.aperture_start = 0; + s390_domain->domain.geometry.aperture_end = ZPCI_TABLE_SIZE_RT - 1; + + spin_lock_init(&s390_domain->list_lock); + INIT_LIST_HEAD_RCU(&s390_domain->devices); + + return &s390_domain->domain; +} + +static void s390_iommu_rcu_free_domain(struct rcu_head *head) +{ + struct s390_domain *s390_domain = container_of(head, struct s390_domain, rcu); + + dma_cleanup_tables(s390_domain->dma_table); + kfree(s390_domain); +} + +static void s390_domain_free(struct iommu_domain *domain) +{ + struct s390_domain *s390_domain = to_s390_domain(domain); + + rcu_read_lock(); + WARN_ON(!list_empty(&s390_domain->devices)); + rcu_read_unlock(); + + call_rcu(&s390_domain->rcu, s390_iommu_rcu_free_domain); +} + +static void __s390_iommu_detach_device(struct zpci_dev *zdev) +{ + struct s390_domain *s390_domain = zdev->s390_domain; + unsigned long flags; + + if (!s390_domain) + return; + + spin_lock_irqsave(&s390_domain->list_lock, flags); + list_del_rcu(&zdev->iommu_list); + spin_unlock_irqrestore(&s390_domain->list_lock, flags); + + zpci_unregister_ioat(zdev, 0); + zdev->s390_domain = NULL; + zdev->dma_table = NULL; +} + +static int s390_iommu_attach_device(struct iommu_domain *domain, + struct device *dev) +{ + struct s390_domain *s390_domain = to_s390_domain(domain); + struct zpci_dev *zdev = to_zpci_dev(dev); + unsigned long flags; + u8 status; + int cc; + + if (!zdev) + return -ENODEV; + + if (WARN_ON(domain->geometry.aperture_start > zdev->end_dma || + domain->geometry.aperture_end < zdev->start_dma)) + return -EINVAL; + + if (zdev->s390_domain) + __s390_iommu_detach_device(zdev); + else if (zdev->dma_table) + zpci_dma_exit_device(zdev); + + cc = zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma, + virt_to_phys(s390_domain->dma_table), &status); + /* + * If the device is undergoing error recovery the reset code + * will re-establish the new domain. + */ + if (cc && status != ZPCI_PCI_ST_FUNC_NOT_AVAIL) + return -EIO; + zdev->dma_table = s390_domain->dma_table; + + zdev->dma_table = s390_domain->dma_table; + zdev->s390_domain = s390_domain; + + spin_lock_irqsave(&s390_domain->list_lock, flags); + list_add_rcu(&zdev->iommu_list, &s390_domain->devices); + spin_unlock_irqrestore(&s390_domain->list_lock, flags); + + return 0; +} + +static void s390_iommu_detach_device(struct iommu_domain *domain, + struct device *dev) +{ + struct zpci_dev *zdev = to_zpci_dev(dev); + + WARN_ON(zdev->s390_domain != to_s390_domain(domain)); + + __s390_iommu_detach_device(zdev); + zpci_dma_init_device(zdev); +} + +static void s390_iommu_get_resv_regions(struct device *dev, + struct list_head *list) +{ + struct zpci_dev *zdev = to_zpci_dev(dev); + struct iommu_resv_region *region; + + if (zdev->start_dma) { + region = iommu_alloc_resv_region(0, zdev->start_dma, 0, + IOMMU_RESV_RESERVED, GFP_KERNEL); + if (!region) + return; + list_add_tail(®ion->list, list); + } + + if (zdev->end_dma < ZPCI_TABLE_SIZE_RT - 1) { + region = iommu_alloc_resv_region(zdev->end_dma + 1, + ZPCI_TABLE_SIZE_RT - zdev->end_dma - 1, + 0, IOMMU_RESV_RESERVED, GFP_KERNEL); + if (!region) + return; + list_add_tail(®ion->list, list); + } +} + +static struct iommu_device *s390_iommu_probe_device(struct device *dev) +{ + struct zpci_dev *zdev; + + if (!dev_is_pci(dev)) + return ERR_PTR(-ENODEV); + + zdev = to_zpci_dev(dev); + + if (zdev->start_dma > zdev->end_dma || + zdev->start_dma > ZPCI_TABLE_SIZE_RT - 1) + return ERR_PTR(-EINVAL); + + if (zdev->end_dma > ZPCI_TABLE_SIZE_RT - 1) + zdev->end_dma = ZPCI_TABLE_SIZE_RT - 1; + + return &zdev->iommu_dev; +} + +static void s390_iommu_release_device(struct device *dev) +{ + struct zpci_dev *zdev = to_zpci_dev(dev); + + /* + * release_device is expected to detach any domain currently attached + * to the device, but keep it attached to other devices in the group. + */ + if (zdev) + __s390_iommu_detach_device(zdev); +} + +static void s390_iommu_flush_iotlb_all(struct iommu_domain *domain) +{ + struct s390_domain *s390_domain = to_s390_domain(domain); + struct zpci_dev *zdev; + + rcu_read_lock(); + list_for_each_entry_rcu(zdev, &s390_domain->devices, iommu_list) { + zpci_refresh_trans((u64)zdev->fh << 32, zdev->start_dma, + zdev->end_dma - zdev->start_dma + 1); + } + rcu_read_unlock(); +} + +static void s390_iommu_iotlb_sync(struct iommu_domain *domain, + struct iommu_iotlb_gather *gather) +{ + struct s390_domain *s390_domain = to_s390_domain(domain); + size_t size = gather->end - gather->start + 1; + struct zpci_dev *zdev; + + /* If gather was never added to there is nothing to flush */ + if (!gather->end) + return; + + rcu_read_lock(); + list_for_each_entry_rcu(zdev, &s390_domain->devices, iommu_list) { + zpci_refresh_trans((u64)zdev->fh << 32, gather->start, + size); + } + rcu_read_unlock(); +} + +static void s390_iommu_iotlb_sync_map(struct iommu_domain *domain, + unsigned long iova, size_t size) +{ + struct s390_domain *s390_domain = to_s390_domain(domain); + struct zpci_dev *zdev; + + rcu_read_lock(); + list_for_each_entry_rcu(zdev, &s390_domain->devices, iommu_list) { + if (!zdev->tlb_refresh) + continue; + zpci_refresh_trans((u64)zdev->fh << 32, + iova, size); + } + rcu_read_unlock(); +} + +static int s390_iommu_validate_trans(struct s390_domain *s390_domain, + phys_addr_t pa, dma_addr_t dma_addr, + unsigned long nr_pages, int flags) +{ + phys_addr_t page_addr = pa & PAGE_MASK; + unsigned long *entry; + unsigned long i; + int rc; + + for (i = 0; i < nr_pages; i++) { + entry = dma_walk_cpu_trans(s390_domain->dma_table, dma_addr); + if (unlikely(!entry)) { + rc = -ENOMEM; + goto undo_cpu_trans; + } + dma_update_cpu_trans(entry, page_addr, flags); + page_addr += PAGE_SIZE; + dma_addr += PAGE_SIZE; + } + + return 0; + +undo_cpu_trans: + while (i-- > 0) { + dma_addr -= PAGE_SIZE; + entry = dma_walk_cpu_trans(s390_domain->dma_table, + dma_addr); + if (!entry) + break; + dma_update_cpu_trans(entry, 0, ZPCI_PTE_INVALID); + } + + return rc; +} + +static int s390_iommu_invalidate_trans(struct s390_domain *s390_domain, + dma_addr_t dma_addr, unsigned long nr_pages) +{ + unsigned long *entry; + unsigned long i; + int rc = 0; + + for (i = 0; i < nr_pages; i++) { + entry = dma_walk_cpu_trans(s390_domain->dma_table, dma_addr); + if (unlikely(!entry)) { + rc = -EINVAL; + break; + } + dma_update_cpu_trans(entry, 0, ZPCI_PTE_INVALID); + dma_addr += PAGE_SIZE; + } + + return rc; +} + +static int s390_iommu_map_pages(struct iommu_domain *domain, + unsigned long iova, phys_addr_t paddr, + size_t pgsize, size_t pgcount, + int prot, gfp_t gfp, size_t *mapped) +{ + struct s390_domain *s390_domain = to_s390_domain(domain); + size_t size = pgcount << __ffs(pgsize); + int flags = ZPCI_PTE_VALID, rc = 0; + + if (pgsize != SZ_4K) + return -EINVAL; + + if (iova < s390_domain->domain.geometry.aperture_start || + (iova + size - 1) > s390_domain->domain.geometry.aperture_end) + return -EINVAL; + + if (!IS_ALIGNED(iova | paddr, pgsize)) + return -EINVAL; + + if (!(prot & IOMMU_READ)) + return -EINVAL; + + if (!(prot & IOMMU_WRITE)) + flags |= ZPCI_TABLE_PROTECTED; + + rc = s390_iommu_validate_trans(s390_domain, paddr, iova, + pgcount, flags); + if (!rc) + *mapped = size; + + return rc; +} + +static phys_addr_t s390_iommu_iova_to_phys(struct iommu_domain *domain, + dma_addr_t iova) +{ + struct s390_domain *s390_domain = to_s390_domain(domain); + unsigned long *rto, *sto, *pto; + unsigned long ste, pte, rte; + unsigned int rtx, sx, px; + phys_addr_t phys = 0; + + if (iova < domain->geometry.aperture_start || + iova > domain->geometry.aperture_end) + return 0; + + rtx = calc_rtx(iova); + sx = calc_sx(iova); + px = calc_px(iova); + rto = s390_domain->dma_table; + + rte = READ_ONCE(rto[rtx]); + if (reg_entry_isvalid(rte)) { + sto = get_rt_sto(rte); + ste = READ_ONCE(sto[sx]); + if (reg_entry_isvalid(ste)) { + pto = get_st_pto(ste); + pte = READ_ONCE(pto[px]); + if (pt_entry_isvalid(pte)) + phys = pte & ZPCI_PTE_ADDR_MASK; + } + } + + return phys; +} + +static size_t s390_iommu_unmap_pages(struct iommu_domain *domain, + unsigned long iova, + size_t pgsize, size_t pgcount, + struct iommu_iotlb_gather *gather) +{ + struct s390_domain *s390_domain = to_s390_domain(domain); + size_t size = pgcount << __ffs(pgsize); + int rc; + + if (WARN_ON(iova < s390_domain->domain.geometry.aperture_start || + (iova + size - 1) > s390_domain->domain.geometry.aperture_end)) + return 0; + + rc = s390_iommu_invalidate_trans(s390_domain, iova, pgcount); + if (rc) + return 0; + + iommu_iotlb_gather_add_range(gather, iova, size); + + return size; +} + +int zpci_init_iommu(struct zpci_dev *zdev) +{ + int rc = 0; + + rc = iommu_device_sysfs_add(&zdev->iommu_dev, NULL, NULL, + "s390-iommu.%08x", zdev->fid); + if (rc) + goto out_err; + + rc = iommu_device_register(&zdev->iommu_dev, &s390_iommu_ops, NULL); + if (rc) + goto out_sysfs; + + return 0; + +out_sysfs: + iommu_device_sysfs_remove(&zdev->iommu_dev); + +out_err: + return rc; +} + +void zpci_destroy_iommu(struct zpci_dev *zdev) +{ + iommu_device_unregister(&zdev->iommu_dev); + iommu_device_sysfs_remove(&zdev->iommu_dev); +} + +static const struct iommu_ops s390_iommu_ops = { + .capable = s390_iommu_capable, + .domain_alloc = s390_domain_alloc, + .probe_device = s390_iommu_probe_device, + .release_device = s390_iommu_release_device, + .device_group = generic_device_group, + .pgsize_bitmap = SZ_4K, + .get_resv_regions = s390_iommu_get_resv_regions, + .default_domain_ops = &(const struct iommu_domain_ops) { + .attach_dev = s390_iommu_attach_device, + .detach_dev = s390_iommu_detach_device, + .map_pages = s390_iommu_map_pages, + .unmap_pages = s390_iommu_unmap_pages, + .flush_iotlb_all = s390_iommu_flush_iotlb_all, + .iotlb_sync = s390_iommu_iotlb_sync, + .iotlb_sync_map = s390_iommu_iotlb_sync_map, + .iova_to_phys = s390_iommu_iova_to_phys, + .free = s390_domain_free, + } +}; -- cgit v1.2.3