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/parport/probe.c | 274 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 274 insertions(+) create mode 100644 drivers/parport/probe.c (limited to 'drivers/parport/probe.c') diff --git a/drivers/parport/probe.c b/drivers/parport/probe.c new file mode 100644 index 000000000..5d1b9aacb --- /dev/null +++ b/drivers/parport/probe.c @@ -0,0 +1,274 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Parallel port device probing code + * + * Authors: Carsten Gross, carsten@sol.wohnheim.uni-ulm.de + * Philip Blundell + */ + +#include +#include +#include +#include +#include +#include + +static const struct { + const char *token; + const char *descr; +} classes[] = { + { "", "Legacy device" }, + { "PRINTER", "Printer" }, + { "MODEM", "Modem" }, + { "NET", "Network device" }, + { "HDC", "Hard disk" }, + { "PCMCIA", "PCMCIA" }, + { "MEDIA", "Multimedia device" }, + { "FDC", "Floppy disk" }, + { "PORTS", "Ports" }, + { "SCANNER", "Scanner" }, + { "DIGICAM", "Digital camera" }, + { "", "Unknown device" }, + { "", "Unspecified" }, + { "SCSIADAPTER", "SCSI adapter" }, + { NULL, NULL } +}; + +static void pretty_print(struct parport *port, int device) +{ + struct parport_device_info *info = &port->probe_info[device + 1]; + + pr_info("%s", port->name); + + if (device >= 0) + pr_cont(" (addr %d)", device); + + pr_cont(": %s", classes[info->class].descr); + if (info->class) + pr_cont(", %s %s", info->mfr, info->model); + + pr_cont("\n"); +} + +static void parse_data(struct parport *port, int device, char *str) +{ + char *txt = kmalloc(strlen(str)+1, GFP_KERNEL); + char *p = txt, *q; + int guessed_class = PARPORT_CLASS_UNSPEC; + struct parport_device_info *info = &port->probe_info[device + 1]; + + if (!txt) { + pr_warn("%s probe: memory squeeze\n", port->name); + return; + } + strcpy(txt, str); + while (p) { + char *sep; + q = strchr(p, ';'); + if (q) *q = 0; + sep = strchr(p, ':'); + if (sep) { + char *u; + *(sep++) = 0; + /* Get rid of trailing blanks */ + u = sep + strlen (sep) - 1; + while (u >= p && *u == ' ') + *u-- = '\0'; + string_upper(p, p); + if (!strcmp(p, "MFG") || !strcmp(p, "MANUFACTURER")) { + kfree(info->mfr); + info->mfr = kstrdup(sep, GFP_KERNEL); + } else if (!strcmp(p, "MDL") || !strcmp(p, "MODEL")) { + kfree(info->model); + info->model = kstrdup(sep, GFP_KERNEL); + } else if (!strcmp(p, "CLS") || !strcmp(p, "CLASS")) { + int i; + + kfree(info->class_name); + info->class_name = kstrdup(sep, GFP_KERNEL); + string_upper(sep, sep); + for (i = 0; classes[i].token; i++) { + if (!strcmp(classes[i].token, sep)) { + info->class = i; + goto rock_on; + } + } + pr_warn("%s probe: warning, class '%s' not understood\n", + port->name, sep); + info->class = PARPORT_CLASS_OTHER; + } else if (!strcmp(p, "CMD") || + !strcmp(p, "COMMAND SET")) { + kfree(info->cmdset); + info->cmdset = kstrdup(sep, GFP_KERNEL); + /* if it speaks printer language, it's + probably a printer */ + if (strstr(sep, "PJL") || strstr(sep, "PCL")) + guessed_class = PARPORT_CLASS_PRINTER; + } else if (!strcmp(p, "DES") || !strcmp(p, "DESCRIPTION")) { + kfree(info->description); + info->description = kstrdup(sep, GFP_KERNEL); + } + } + rock_on: + if (q) + p = q + 1; + else + p = NULL; + } + + /* If the device didn't tell us its class, maybe we have managed to + guess one from the things it did say. */ + if (info->class == PARPORT_CLASS_UNSPEC) + info->class = guessed_class; + + pretty_print (port, device); + + kfree(txt); +} + +/* Read up to count-1 bytes of device id. Terminate buffer with + * '\0'. Buffer begins with two Device ID length bytes as given by + * device. */ +static ssize_t parport_read_device_id (struct parport *port, char *buffer, + size_t count) +{ + unsigned char length[2]; + unsigned lelen, belen; + size_t idlens[4]; + unsigned numidlens; + unsigned current_idlen; + ssize_t retval; + size_t len; + + /* First two bytes are MSB,LSB of inclusive length. */ + retval = parport_read (port, length, 2); + + if (retval < 0) + return retval; + if (retval != 2) + return -EIO; + + if (count < 2) + return 0; + memcpy(buffer, length, 2); + len = 2; + + /* Some devices wrongly send LE length, and some send it two + * bytes short. Construct a sorted array of lengths to try. */ + belen = (length[0] << 8) + length[1]; + lelen = (length[1] << 8) + length[0]; + idlens[0] = min(belen, lelen); + idlens[1] = idlens[0]+2; + if (belen != lelen) { + int off = 2; + /* Don't try lengths of 0x100 and 0x200 as 1 and 2 */ + if (idlens[0] <= 2) + off = 0; + idlens[off] = max(belen, lelen); + idlens[off+1] = idlens[off]+2; + numidlens = off+2; + } + else { + /* Some devices don't truly implement Device ID, but + * just return constant nibble forever. This catches + * also those cases. */ + if (idlens[0] == 0 || idlens[0] > 0xFFF) { + printk(KERN_DEBUG "%s: reported broken Device ID length of %#zX bytes\n", + port->name, idlens[0]); + return -EIO; + } + numidlens = 2; + } + + /* Try to respect the given ID length despite all the bugs in + * the ID length. Read according to shortest possible ID + * first. */ + for (current_idlen = 0; current_idlen < numidlens; ++current_idlen) { + size_t idlen = idlens[current_idlen]; + if (idlen+1 >= count) + break; + + retval = parport_read (port, buffer+len, idlen-len); + + if (retval < 0) + return retval; + len += retval; + + if (port->physport->ieee1284.phase != IEEE1284_PH_HBUSY_DAVAIL) { + if (belen != len) { + printk(KERN_DEBUG "%s: Device ID was %zd bytes while device told it would be %d bytes\n", + port->name, len, belen); + } + goto done; + } + + /* This might end reading the Device ID too + * soon. Hopefully the needed fields were already in + * the first 256 bytes or so that we must have read so + * far. */ + if (buffer[len-1] == ';') { + printk(KERN_DEBUG "%s: Device ID reading stopped before device told data not available. Current idlen %u of %u, len bytes %02X %02X\n", + port->name, current_idlen, numidlens, + length[0], length[1]); + goto done; + } + } + if (current_idlen < numidlens) { + /* Buffer not large enough, read to end of buffer. */ + size_t idlen, len2; + if (len+1 < count) { + retval = parport_read (port, buffer+len, count-len-1); + if (retval < 0) + return retval; + len += retval; + } + /* Read the whole ID since some devices would not + * otherwise give back the Device ID from beginning + * next time when asked. */ + idlen = idlens[current_idlen]; + len2 = len; + while(len2 < idlen && retval > 0) { + char tmp[4]; + retval = parport_read (port, tmp, + min(sizeof tmp, idlen-len2)); + if (retval < 0) + return retval; + len2 += retval; + } + } + /* In addition, there are broken devices out there that don't + even finish off with a semi-colon. We do not need to care + about those at this time. */ + done: + buffer[len] = '\0'; + return len; +} + +/* Get Std 1284 Device ID. */ +ssize_t parport_device_id (int devnum, char *buffer, size_t count) +{ + ssize_t retval = -ENXIO; + struct pardevice *dev = parport_open(devnum, daisy_dev_name); + if (!dev) + return -ENXIO; + + parport_claim_or_block (dev); + + /* Negotiate to compatibility mode, and then to device ID + * mode. (This so that we start form beginning of device ID if + * already in device ID mode.) */ + parport_negotiate (dev->port, IEEE1284_MODE_COMPAT); + retval = parport_negotiate (dev->port, + IEEE1284_MODE_NIBBLE | IEEE1284_DEVICEID); + + if (!retval) { + retval = parport_read_device_id (dev->port, buffer, count); + parport_negotiate (dev->port, IEEE1284_MODE_COMPAT); + if (retval > 2) + parse_data (dev->port, dev->daisy, buffer+2); + } + + parport_release (dev); + parport_close (dev); + return retval; +} -- cgit v1.2.3