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/scsi/libsas/sas_port.c | 373 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 373 insertions(+) create mode 100644 drivers/scsi/libsas/sas_port.c (limited to 'drivers/scsi/libsas/sas_port.c') diff --git a/drivers/scsi/libsas/sas_port.c b/drivers/scsi/libsas/sas_port.c new file mode 100644 index 000000000..11599c0e3 --- /dev/null +++ b/drivers/scsi/libsas/sas_port.c @@ -0,0 +1,373 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Serial Attached SCSI (SAS) Port class + * + * Copyright (C) 2005 Adaptec, Inc. All rights reserved. + * Copyright (C) 2005 Luben Tuikov + */ + +#include "sas_internal.h" + +#include +#include +#include "scsi_sas_internal.h" + +static bool phy_is_wideport_member(struct asd_sas_port *port, struct asd_sas_phy *phy) +{ + struct sas_ha_struct *sas_ha = phy->ha; + + if (memcmp(port->attached_sas_addr, phy->attached_sas_addr, + SAS_ADDR_SIZE) != 0 || (sas_ha->strict_wide_ports && + memcmp(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE) != 0)) + return false; + return true; +} + +static void sas_resume_port(struct asd_sas_phy *phy) +{ + struct domain_device *dev, *n; + struct asd_sas_port *port = phy->port; + struct sas_ha_struct *sas_ha = phy->ha; + struct sas_internal *si = to_sas_internal(sas_ha->core.shost->transportt); + + if (si->dft->lldd_port_formed) + si->dft->lldd_port_formed(phy); + + if (port->suspended) + port->suspended = 0; + else { + /* we only need to handle "link returned" actions once */ + return; + } + + /* if the port came back: + * 1/ presume every device came back + * 2/ force the next revalidation to check all expander phys + */ + list_for_each_entry_safe(dev, n, &port->dev_list, dev_list_node) { + int i, rc; + + rc = sas_notify_lldd_dev_found(dev); + if (rc) { + sas_unregister_dev(port, dev); + sas_destruct_devices(port); + continue; + } + + if (dev_is_expander(dev->dev_type)) { + dev->ex_dev.ex_change_count = -1; + for (i = 0; i < dev->ex_dev.num_phys; i++) { + struct ex_phy *phy = &dev->ex_dev.ex_phy[i]; + + phy->phy_change_count = -1; + } + } + } + + sas_discover_event(port, DISCE_RESUME); +} + +static void sas_form_port_add_phy(struct asd_sas_port *port, + struct asd_sas_phy *phy, bool wideport) +{ + list_add_tail(&phy->port_phy_el, &port->phy_list); + sas_phy_set_target(phy, port->port_dev); + phy->port = port; + port->num_phys++; + port->phy_mask |= (1U << phy->id); + + if (wideport) + pr_debug("phy%d matched wide port%d\n", phy->id, + port->id); + else + memcpy(port->sas_addr, phy->sas_addr, SAS_ADDR_SIZE); + + if (*(u64 *)port->attached_sas_addr == 0) { + port->class = phy->class; + memcpy(port->attached_sas_addr, phy->attached_sas_addr, + SAS_ADDR_SIZE); + port->iproto = phy->iproto; + port->tproto = phy->tproto; + port->oob_mode = phy->oob_mode; + port->linkrate = phy->linkrate; + } else { + port->linkrate = max(port->linkrate, phy->linkrate); + } +} + +/** + * sas_form_port - add this phy to a port + * @phy: the phy of interest + * + * This function adds this phy to an existing port, thus creating a wide + * port, or it creates a port and adds the phy to the port. + */ +static void sas_form_port(struct asd_sas_phy *phy) +{ + int i; + struct sas_ha_struct *sas_ha = phy->ha; + struct asd_sas_port *port = phy->port; + struct domain_device *port_dev = NULL; + struct sas_internal *si = + to_sas_internal(sas_ha->core.shost->transportt); + unsigned long flags; + + if (port) { + if (!phy_is_wideport_member(port, phy)) + sas_deform_port(phy, 0); + else if (phy->suspended) { + phy->suspended = 0; + sas_resume_port(phy); + + /* phy came back, try to cancel the timeout */ + wake_up(&sas_ha->eh_wait_q); + return; + } else { + pr_info("%s: phy%d belongs to port%d already(%d)!\n", + __func__, phy->id, phy->port->id, + phy->port->num_phys); + return; + } + } + + /* see if the phy should be part of a wide port */ + spin_lock_irqsave(&sas_ha->phy_port_lock, flags); + for (i = 0; i < sas_ha->num_phys; i++) { + port = sas_ha->sas_port[i]; + spin_lock(&port->phy_list_lock); + if (*(u64 *) port->sas_addr && + phy_is_wideport_member(port, phy) && port->num_phys > 0) { + /* wide port */ + port_dev = port->port_dev; + sas_form_port_add_phy(port, phy, true); + spin_unlock(&port->phy_list_lock); + break; + } + spin_unlock(&port->phy_list_lock); + } + /* The phy does not match any existing port, create a new one */ + if (i == sas_ha->num_phys) { + for (i = 0; i < sas_ha->num_phys; i++) { + port = sas_ha->sas_port[i]; + spin_lock(&port->phy_list_lock); + if (*(u64 *)port->sas_addr == 0 + && port->num_phys == 0) { + port_dev = port->port_dev; + sas_form_port_add_phy(port, phy, false); + spin_unlock(&port->phy_list_lock); + break; + } + spin_unlock(&port->phy_list_lock); + } + + if (i >= sas_ha->num_phys) { + pr_err("%s: couldn't find a free port, bug?\n", + __func__); + spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); + return; + } + } + spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); + + if (!port->port) { + port->port = sas_port_alloc(phy->phy->dev.parent, port->id); + BUG_ON(!port->port); + sas_port_add(port->port); + } + sas_port_add_phy(port->port, phy->phy); + + pr_debug("%s added to %s, phy_mask:0x%x (%016llx)\n", + dev_name(&phy->phy->dev), dev_name(&port->port->dev), + port->phy_mask, + SAS_ADDR(port->attached_sas_addr)); + + if (port_dev) + port_dev->pathways = port->num_phys; + + /* Tell the LLDD about this port formation. */ + if (si->dft->lldd_port_formed) + si->dft->lldd_port_formed(phy); + + sas_discover_event(phy->port, DISCE_DISCOVER_DOMAIN); + /* Only insert a revalidate event after initial discovery */ + if (port_dev && dev_is_expander(port_dev->dev_type)) { + struct expander_device *ex_dev = &port_dev->ex_dev; + + ex_dev->ex_change_count = -1; + sas_discover_event(port, DISCE_REVALIDATE_DOMAIN); + } + flush_workqueue(sas_ha->disco_q); +} + +/** + * sas_deform_port - remove this phy from the port it belongs to + * @phy: the phy of interest + * @gone: whether or not the PHY is gone + * + * This is called when the physical link to the other phy has been + * lost (on this phy), in Event thread context. We cannot delay here. + */ +void sas_deform_port(struct asd_sas_phy *phy, int gone) +{ + struct sas_ha_struct *sas_ha = phy->ha; + struct asd_sas_port *port = phy->port; + struct sas_internal *si = + to_sas_internal(sas_ha->core.shost->transportt); + struct domain_device *dev; + unsigned long flags; + + if (!port) + return; /* done by a phy event */ + + dev = port->port_dev; + if (dev) + dev->pathways--; + + if (port->num_phys == 1) { + sas_unregister_domain_devices(port, gone); + sas_destruct_devices(port); + sas_port_delete(port->port); + port->port = NULL; + } else { + sas_port_delete_phy(port->port, phy->phy); + sas_device_set_phy(dev, port->port); + } + + if (si->dft->lldd_port_deformed) + si->dft->lldd_port_deformed(phy); + + spin_lock_irqsave(&sas_ha->phy_port_lock, flags); + spin_lock(&port->phy_list_lock); + + list_del_init(&phy->port_phy_el); + sas_phy_set_target(phy, NULL); + phy->port = NULL; + port->num_phys--; + port->phy_mask &= ~(1U << phy->id); + + if (port->num_phys == 0) { + INIT_LIST_HEAD(&port->phy_list); + memset(port->sas_addr, 0, SAS_ADDR_SIZE); + memset(port->attached_sas_addr, 0, SAS_ADDR_SIZE); + port->class = 0; + port->iproto = 0; + port->tproto = 0; + port->oob_mode = 0; + port->phy_mask = 0; + } + spin_unlock(&port->phy_list_lock); + spin_unlock_irqrestore(&sas_ha->phy_port_lock, flags); + + /* Only insert revalidate event if the port still has members */ + if (port->port && dev && dev_is_expander(dev->dev_type)) { + struct expander_device *ex_dev = &dev->ex_dev; + + ex_dev->ex_change_count = -1; + sas_discover_event(port, DISCE_REVALIDATE_DOMAIN); + } + flush_workqueue(sas_ha->disco_q); + + return; +} + +/* ---------- SAS port events ---------- */ + +void sas_porte_bytes_dmaed(struct work_struct *work) +{ + struct asd_sas_event *ev = to_asd_sas_event(work); + struct asd_sas_phy *phy = ev->phy; + + sas_form_port(phy); +} + +void sas_porte_broadcast_rcvd(struct work_struct *work) +{ + struct asd_sas_event *ev = to_asd_sas_event(work); + struct asd_sas_phy *phy = ev->phy; + unsigned long flags; + u32 prim; + + spin_lock_irqsave(&phy->sas_prim_lock, flags); + prim = phy->sas_prim; + spin_unlock_irqrestore(&phy->sas_prim_lock, flags); + + pr_debug("broadcast received: %d\n", prim); + sas_discover_event(phy->port, DISCE_REVALIDATE_DOMAIN); + + if (phy->port) + flush_workqueue(phy->port->ha->disco_q); +} + +void sas_porte_link_reset_err(struct work_struct *work) +{ + struct asd_sas_event *ev = to_asd_sas_event(work); + struct asd_sas_phy *phy = ev->phy; + + sas_deform_port(phy, 1); +} + +void sas_porte_timer_event(struct work_struct *work) +{ + struct asd_sas_event *ev = to_asd_sas_event(work); + struct asd_sas_phy *phy = ev->phy; + + sas_deform_port(phy, 1); +} + +void sas_porte_hard_reset(struct work_struct *work) +{ + struct asd_sas_event *ev = to_asd_sas_event(work); + struct asd_sas_phy *phy = ev->phy; + + sas_deform_port(phy, 1); +} + +/* ---------- SAS port registration ---------- */ + +static void sas_init_port(struct asd_sas_port *port, + struct sas_ha_struct *sas_ha, int i) +{ + memset(port, 0, sizeof(*port)); + port->id = i; + INIT_LIST_HEAD(&port->dev_list); + INIT_LIST_HEAD(&port->disco_list); + INIT_LIST_HEAD(&port->destroy_list); + INIT_LIST_HEAD(&port->sas_port_del_list); + spin_lock_init(&port->phy_list_lock); + INIT_LIST_HEAD(&port->phy_list); + port->ha = sas_ha; + + spin_lock_init(&port->dev_list_lock); +} + +int sas_register_ports(struct sas_ha_struct *sas_ha) +{ + int i; + + /* initialize the ports and discovery */ + for (i = 0; i < sas_ha->num_phys; i++) { + struct asd_sas_port *port = sas_ha->sas_port[i]; + + sas_init_port(port, sas_ha, i); + sas_init_disc(&port->disc, port); + } + return 0; +} + +void sas_unregister_ports(struct sas_ha_struct *sas_ha) +{ + int i; + + for (i = 0; i < sas_ha->num_phys; i++) + if (sas_ha->sas_phy[i]->port) + sas_deform_port(sas_ha->sas_phy[i], 0); + +} + +const work_func_t sas_port_event_fns[PORT_NUM_EVENTS] = { + [PORTE_BYTES_DMAED] = sas_porte_bytes_dmaed, + [PORTE_BROADCAST_RCVD] = sas_porte_broadcast_rcvd, + [PORTE_LINK_RESET_ERR] = sas_porte_link_reset_err, + [PORTE_TIMER_EVENT] = sas_porte_timer_event, + [PORTE_HARD_RESET] = sas_porte_hard_reset, +}; -- cgit v1.2.3