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/usb/host/uhci-hub.c | 421 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 421 insertions(+) create mode 100644 drivers/usb/host/uhci-hub.c (limited to 'drivers/usb/host/uhci-hub.c') diff --git a/drivers/usb/host/uhci-hub.c b/drivers/usb/host/uhci-hub.c new file mode 100644 index 000000000..47106dd8c --- /dev/null +++ b/drivers/usb/host/uhci-hub.c @@ -0,0 +1,421 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Universal Host Controller Interface driver for USB. + * + * Maintainer: Alan Stern + * + * (C) Copyright 1999 Linus Torvalds + * (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com + * (C) Copyright 1999 Randy Dunlap + * (C) Copyright 1999 Georg Acher, acher@in.tum.de + * (C) Copyright 1999 Deti Fliegl, deti@fliegl.de + * (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch + * (C) Copyright 2004 Alan Stern, stern@rowland.harvard.edu + */ + +static const __u8 root_hub_hub_des[] = +{ + 0x09, /* __u8 bLength; */ + USB_DT_HUB, /* __u8 bDescriptorType; Hub-descriptor */ + 0x02, /* __u8 bNbrPorts; */ + HUB_CHAR_NO_LPSM | /* __u16 wHubCharacteristics; */ + HUB_CHAR_INDV_PORT_OCPM, /* (per-port OC, no power switching) */ + 0x00, + 0x01, /* __u8 bPwrOn2pwrGood; 2ms */ + 0x00, /* __u8 bHubContrCurrent; 0 mA */ + 0x00, /* __u8 DeviceRemovable; *** 7 Ports max */ + 0xff /* __u8 PortPwrCtrlMask; *** 7 ports max */ +}; + +#define UHCI_RH_MAXCHILD 7 + +/* must write as zeroes */ +#define WZ_BITS (USBPORTSC_RES2 | USBPORTSC_RES3 | USBPORTSC_RES4) + +/* status change bits: nonzero writes will clear */ +#define RWC_BITS (USBPORTSC_OCC | USBPORTSC_PEC | USBPORTSC_CSC) + +/* suspend/resume bits: port suspended or port resuming */ +#define SUSPEND_BITS (USBPORTSC_SUSP | USBPORTSC_RD) + +/* A port that either is connected or has a changed-bit set will prevent + * us from AUTO_STOPPING. + */ +static int any_ports_active(struct uhci_hcd *uhci) +{ + int port; + + for (port = 0; port < uhci->rh_numports; ++port) { + if ((uhci_readw(uhci, USBPORTSC1 + port * 2) & + (USBPORTSC_CCS | RWC_BITS)) || + test_bit(port, &uhci->port_c_suspend)) + return 1; + } + return 0; +} + +static inline int get_hub_status_data(struct uhci_hcd *uhci, char *buf) +{ + int port; + int mask = RWC_BITS; + + /* Some boards (both VIA and Intel apparently) report bogus + * overcurrent indications, causing massive log spam unless + * we completely ignore them. This doesn't seem to be a problem + * with the chipset so much as with the way it is connected on + * the motherboard; if the overcurrent input is left to float + * then it may constantly register false positives. */ + if (ignore_oc) + mask &= ~USBPORTSC_OCC; + + *buf = 0; + for (port = 0; port < uhci->rh_numports; ++port) { + if ((uhci_readw(uhci, USBPORTSC1 + port * 2) & mask) || + test_bit(port, &uhci->port_c_suspend)) + *buf |= (1 << (port + 1)); + } + return !!*buf; +} + +#define CLR_RH_PORTSTAT(x) \ + status = uhci_readw(uhci, port_addr); \ + status &= ~(RWC_BITS|WZ_BITS); \ + status &= ~(x); \ + status |= RWC_BITS & (x); \ + uhci_writew(uhci, status, port_addr) + +#define SET_RH_PORTSTAT(x) \ + status = uhci_readw(uhci, port_addr); \ + status |= (x); \ + status &= ~(RWC_BITS|WZ_BITS); \ + uhci_writew(uhci, status, port_addr) + +/* UHCI controllers don't automatically stop resume signalling after 20 msec, + * so we have to poll and check timeouts in order to take care of it. + */ +static void uhci_finish_suspend(struct uhci_hcd *uhci, int port, + unsigned long port_addr) +{ + int status; + int i; + + if (uhci_readw(uhci, port_addr) & SUSPEND_BITS) { + CLR_RH_PORTSTAT(SUSPEND_BITS); + if (test_bit(port, &uhci->resuming_ports)) + set_bit(port, &uhci->port_c_suspend); + + /* The controller won't actually turn off the RD bit until + * it has had a chance to send a low-speed EOP sequence, + * which is supposed to take 3 bit times (= 2 microseconds). + * Experiments show that some controllers take longer, so + * we'll poll for completion. */ + for (i = 0; i < 10; ++i) { + if (!(uhci_readw(uhci, port_addr) & SUSPEND_BITS)) + break; + udelay(1); + } + } + clear_bit(port, &uhci->resuming_ports); + usb_hcd_end_port_resume(&uhci_to_hcd(uhci)->self, port); +} + +/* Wait for the UHCI controller in HP's iLO2 server management chip. + * It can take up to 250 us to finish a reset and set the CSC bit. + */ +static void wait_for_HP(struct uhci_hcd *uhci, unsigned long port_addr) +{ + int i; + + for (i = 10; i < 250; i += 10) { + if (uhci_readw(uhci, port_addr) & USBPORTSC_CSC) + return; + udelay(10); + } + /* Log a warning? */ +} + +static void uhci_check_ports(struct uhci_hcd *uhci) +{ + unsigned int port; + unsigned long port_addr; + int status; + + for (port = 0; port < uhci->rh_numports; ++port) { + port_addr = USBPORTSC1 + 2 * port; + status = uhci_readw(uhci, port_addr); + if (unlikely(status & USBPORTSC_PR)) { + if (time_after_eq(jiffies, uhci->ports_timeout)) { + CLR_RH_PORTSTAT(USBPORTSC_PR); + udelay(10); + + /* HP's server management chip requires + * a longer delay. */ + if (uhci->wait_for_hp) + wait_for_HP(uhci, port_addr); + + /* If the port was enabled before, turning + * reset on caused a port enable change. + * Turning reset off causes a port connect + * status change. Clear these changes. */ + CLR_RH_PORTSTAT(USBPORTSC_CSC | USBPORTSC_PEC); + SET_RH_PORTSTAT(USBPORTSC_PE); + } + } + if (unlikely(status & USBPORTSC_RD)) { + if (!test_bit(port, &uhci->resuming_ports)) { + + /* Port received a wakeup request */ + set_bit(port, &uhci->resuming_ports); + uhci->ports_timeout = jiffies + + msecs_to_jiffies(USB_RESUME_TIMEOUT); + usb_hcd_start_port_resume( + &uhci_to_hcd(uhci)->self, port); + + /* Make sure we see the port again + * after the resuming period is over. */ + mod_timer(&uhci_to_hcd(uhci)->rh_timer, + uhci->ports_timeout); + } else if (time_after_eq(jiffies, + uhci->ports_timeout)) { + uhci_finish_suspend(uhci, port, port_addr); + } + } + } +} + +static int uhci_hub_status_data(struct usb_hcd *hcd, char *buf) +{ + struct uhci_hcd *uhci = hcd_to_uhci(hcd); + unsigned long flags; + int status = 0; + + spin_lock_irqsave(&uhci->lock, flags); + + uhci_scan_schedule(uhci); + if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead) + goto done; + uhci_check_ports(uhci); + + status = get_hub_status_data(uhci, buf); + + switch (uhci->rh_state) { + case UHCI_RH_SUSPENDED: + /* if port change, ask to be resumed */ + if (status || uhci->resuming_ports) { + status = 1; + usb_hcd_resume_root_hub(hcd); + } + break; + + case UHCI_RH_AUTO_STOPPED: + /* if port change, auto start */ + if (status) + wakeup_rh(uhci); + break; + + case UHCI_RH_RUNNING: + /* are any devices attached? */ + if (!any_ports_active(uhci)) { + uhci->rh_state = UHCI_RH_RUNNING_NODEVS; + uhci->auto_stop_time = jiffies + HZ; + } + break; + + case UHCI_RH_RUNNING_NODEVS: + /* auto-stop if nothing connected for 1 second */ + if (any_ports_active(uhci)) + uhci->rh_state = UHCI_RH_RUNNING; + else if (time_after_eq(jiffies, uhci->auto_stop_time) && + !uhci->wait_for_hp) + suspend_rh(uhci, UHCI_RH_AUTO_STOPPED); + break; + + default: + break; + } + +done: + spin_unlock_irqrestore(&uhci->lock, flags); + return status; +} + +/* size of returned buffer is part of USB spec */ +static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, + u16 wIndex, char *buf, u16 wLength) +{ + struct uhci_hcd *uhci = hcd_to_uhci(hcd); + int status, lstatus, retval = 0; + unsigned int port = wIndex - 1; + unsigned long port_addr = USBPORTSC1 + 2 * port; + u16 wPortChange, wPortStatus; + unsigned long flags; + + if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead) + return -ETIMEDOUT; + + spin_lock_irqsave(&uhci->lock, flags); + switch (typeReq) { + + case GetHubStatus: + *(__le32 *)buf = cpu_to_le32(0); + retval = 4; /* hub power */ + break; + case GetPortStatus: + if (port >= uhci->rh_numports) + goto err; + + uhci_check_ports(uhci); + status = uhci_readw(uhci, port_addr); + + /* Intel controllers report the OverCurrent bit active on. + * VIA controllers report it active off, so we'll adjust the + * bit value. (It's not standardized in the UHCI spec.) + */ + if (uhci->oc_low) + status ^= USBPORTSC_OC; + + /* UHCI doesn't support C_RESET (always false) */ + wPortChange = lstatus = 0; + if (status & USBPORTSC_CSC) + wPortChange |= USB_PORT_STAT_C_CONNECTION; + if (status & USBPORTSC_PEC) + wPortChange |= USB_PORT_STAT_C_ENABLE; + if ((status & USBPORTSC_OCC) && !ignore_oc) + wPortChange |= USB_PORT_STAT_C_OVERCURRENT; + + if (test_bit(port, &uhci->port_c_suspend)) { + wPortChange |= USB_PORT_STAT_C_SUSPEND; + lstatus |= 1; + } + if (test_bit(port, &uhci->resuming_ports)) + lstatus |= 4; + + /* UHCI has no power switching (always on) */ + wPortStatus = USB_PORT_STAT_POWER; + if (status & USBPORTSC_CCS) + wPortStatus |= USB_PORT_STAT_CONNECTION; + if (status & USBPORTSC_PE) { + wPortStatus |= USB_PORT_STAT_ENABLE; + if (status & SUSPEND_BITS) + wPortStatus |= USB_PORT_STAT_SUSPEND; + } + if (status & USBPORTSC_OC) + wPortStatus |= USB_PORT_STAT_OVERCURRENT; + if (status & USBPORTSC_PR) + wPortStatus |= USB_PORT_STAT_RESET; + if (status & USBPORTSC_LSDA) + wPortStatus |= USB_PORT_STAT_LOW_SPEED; + + if (wPortChange) + dev_dbg(uhci_dev(uhci), "port %d portsc %04x,%02x\n", + wIndex, status, lstatus); + + *(__le16 *)buf = cpu_to_le16(wPortStatus); + *(__le16 *)(buf + 2) = cpu_to_le16(wPortChange); + retval = 4; + break; + case SetHubFeature: /* We don't implement these */ + case ClearHubFeature: + switch (wValue) { + case C_HUB_OVER_CURRENT: + case C_HUB_LOCAL_POWER: + break; + default: + goto err; + } + break; + case SetPortFeature: + if (port >= uhci->rh_numports) + goto err; + + switch (wValue) { + case USB_PORT_FEAT_SUSPEND: + SET_RH_PORTSTAT(USBPORTSC_SUSP); + break; + case USB_PORT_FEAT_RESET: + SET_RH_PORTSTAT(USBPORTSC_PR); + + /* Reset terminates Resume signalling */ + uhci_finish_suspend(uhci, port, port_addr); + + /* USB v2.0 7.1.7.5 */ + uhci->ports_timeout = jiffies + + msecs_to_jiffies(USB_RESUME_TIMEOUT); + break; + case USB_PORT_FEAT_POWER: + /* UHCI has no power switching */ + break; + default: + goto err; + } + break; + case ClearPortFeature: + if (port >= uhci->rh_numports) + goto err; + + switch (wValue) { + case USB_PORT_FEAT_ENABLE: + CLR_RH_PORTSTAT(USBPORTSC_PE); + + /* Disable terminates Resume signalling */ + uhci_finish_suspend(uhci, port, port_addr); + break; + case USB_PORT_FEAT_C_ENABLE: + CLR_RH_PORTSTAT(USBPORTSC_PEC); + break; + case USB_PORT_FEAT_SUSPEND: + if (!(uhci_readw(uhci, port_addr) & USBPORTSC_SUSP)) { + + /* Make certain the port isn't suspended */ + uhci_finish_suspend(uhci, port, port_addr); + } else if (!test_and_set_bit(port, + &uhci->resuming_ports)) { + SET_RH_PORTSTAT(USBPORTSC_RD); + + /* The controller won't allow RD to be set + * if the port is disabled. When this happens + * just skip the Resume signalling. + */ + if (!(uhci_readw(uhci, port_addr) & + USBPORTSC_RD)) + uhci_finish_suspend(uhci, port, + port_addr); + else + /* USB v2.0 7.1.7.7 */ + uhci->ports_timeout = jiffies + + msecs_to_jiffies(20); + } + break; + case USB_PORT_FEAT_C_SUSPEND: + clear_bit(port, &uhci->port_c_suspend); + break; + case USB_PORT_FEAT_POWER: + /* UHCI has no power switching */ + goto err; + case USB_PORT_FEAT_C_CONNECTION: + CLR_RH_PORTSTAT(USBPORTSC_CSC); + break; + case USB_PORT_FEAT_C_OVER_CURRENT: + CLR_RH_PORTSTAT(USBPORTSC_OCC); + break; + case USB_PORT_FEAT_C_RESET: + /* this driver won't report these */ + break; + default: + goto err; + } + break; + case GetHubDescriptor: + retval = min_t(unsigned int, sizeof(root_hub_hub_des), wLength); + memcpy(buf, root_hub_hub_des, retval); + if (retval > 2) + buf[2] = uhci->rh_numports; + break; + default: +err: + retval = -EPIPE; + } + spin_unlock_irqrestore(&uhci->lock, flags); + + return retval; +} -- cgit v1.2.3