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/sbus/char/bbc_i2c.c | 425 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 425 insertions(+) create mode 100644 drivers/sbus/char/bbc_i2c.c (limited to 'drivers/sbus/char/bbc_i2c.c') diff --git a/drivers/sbus/char/bbc_i2c.c b/drivers/sbus/char/bbc_i2c.c new file mode 100644 index 000000000..537e55cd0 --- /dev/null +++ b/drivers/sbus/char/bbc_i2c.c @@ -0,0 +1,425 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* bbc_i2c.c: I2C low-level driver for BBC device on UltraSPARC-III + * platforms. + * + * Copyright (C) 2001, 2008 David S. Miller (davem@davemloft.net) + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "bbc_i2c.h" + +/* Convert this driver to use i2c bus layer someday... */ +#define I2C_PCF_PIN 0x80 +#define I2C_PCF_ESO 0x40 +#define I2C_PCF_ES1 0x20 +#define I2C_PCF_ES2 0x10 +#define I2C_PCF_ENI 0x08 +#define I2C_PCF_STA 0x04 +#define I2C_PCF_STO 0x02 +#define I2C_PCF_ACK 0x01 + +#define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ENI | I2C_PCF_STA | I2C_PCF_ACK) +#define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK) +#define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK) +#define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK) + +#define I2C_PCF_INI 0x40 /* 1 if not initialized */ +#define I2C_PCF_STS 0x20 +#define I2C_PCF_BER 0x10 +#define I2C_PCF_AD0 0x08 +#define I2C_PCF_LRB 0x08 +#define I2C_PCF_AAS 0x04 +#define I2C_PCF_LAB 0x02 +#define I2C_PCF_BB 0x01 + +/* The BBC devices have two I2C controllers. The first I2C controller + * connects mainly to configuration proms (NVRAM, cpu configuration, + * dimm types, etc.). Whereas the second I2C controller connects to + * environmental control devices such as fans and temperature sensors. + * The second controller also connects to the smartcard reader, if present. + */ + +static void set_device_claimage(struct bbc_i2c_bus *bp, struct platform_device *op, int val) +{ + int i; + + for (i = 0; i < NUM_CHILDREN; i++) { + if (bp->devs[i].device == op) { + bp->devs[i].client_claimed = val; + return; + } + } +} + +#define claim_device(BP,ECHILD) set_device_claimage(BP,ECHILD,1) +#define release_device(BP,ECHILD) set_device_claimage(BP,ECHILD,0) + +struct platform_device *bbc_i2c_getdev(struct bbc_i2c_bus *bp, int index) +{ + struct platform_device *op = NULL; + int curidx = 0, i; + + for (i = 0; i < NUM_CHILDREN; i++) { + if (!(op = bp->devs[i].device)) + break; + if (curidx == index) + goto out; + op = NULL; + curidx++; + } + +out: + if (curidx == index) + return op; + return NULL; +} + +struct bbc_i2c_client *bbc_i2c_attach(struct bbc_i2c_bus *bp, struct platform_device *op) +{ + struct bbc_i2c_client *client; + const u32 *reg; + + client = kzalloc(sizeof(*client), GFP_KERNEL); + if (!client) + return NULL; + client->bp = bp; + client->op = op; + + reg = of_get_property(op->dev.of_node, "reg", NULL); + if (!reg) { + kfree(client); + return NULL; + } + + client->bus = reg[0]; + client->address = reg[1]; + + claim_device(bp, op); + + return client; +} + +void bbc_i2c_detach(struct bbc_i2c_client *client) +{ + struct bbc_i2c_bus *bp = client->bp; + struct platform_device *op = client->op; + + release_device(bp, op); + kfree(client); +} + +static int wait_for_pin(struct bbc_i2c_bus *bp, u8 *status) +{ + DECLARE_WAITQUEUE(wait, current); + int limit = 32; + int ret = 1; + + bp->waiting = 1; + add_wait_queue(&bp->wq, &wait); + while (limit-- > 0) { + long val; + + val = wait_event_interruptible_timeout( + bp->wq, + (((*status = readb(bp->i2c_control_regs + 0)) + & I2C_PCF_PIN) == 0), + msecs_to_jiffies(250)); + if (val > 0) { + ret = 0; + break; + } + } + remove_wait_queue(&bp->wq, &wait); + bp->waiting = 0; + + return ret; +} + +int bbc_i2c_writeb(struct bbc_i2c_client *client, unsigned char val, int off) +{ + struct bbc_i2c_bus *bp = client->bp; + int address = client->address; + u8 status; + int ret = -1; + + if (bp->i2c_bussel_reg != NULL) + writeb(client->bus, bp->i2c_bussel_reg); + + writeb(address, bp->i2c_control_regs + 0x1); + writeb(I2C_PCF_START, bp->i2c_control_regs + 0x0); + if (wait_for_pin(bp, &status)) + goto out; + + writeb(off, bp->i2c_control_regs + 0x1); + if (wait_for_pin(bp, &status) || + (status & I2C_PCF_LRB) != 0) + goto out; + + writeb(val, bp->i2c_control_regs + 0x1); + if (wait_for_pin(bp, &status)) + goto out; + + ret = 0; + +out: + writeb(I2C_PCF_STOP, bp->i2c_control_regs + 0x0); + return ret; +} + +int bbc_i2c_readb(struct bbc_i2c_client *client, unsigned char *byte, int off) +{ + struct bbc_i2c_bus *bp = client->bp; + unsigned char address = client->address, status; + int ret = -1; + + if (bp->i2c_bussel_reg != NULL) + writeb(client->bus, bp->i2c_bussel_reg); + + writeb(address, bp->i2c_control_regs + 0x1); + writeb(I2C_PCF_START, bp->i2c_control_regs + 0x0); + if (wait_for_pin(bp, &status)) + goto out; + + writeb(off, bp->i2c_control_regs + 0x1); + if (wait_for_pin(bp, &status) || + (status & I2C_PCF_LRB) != 0) + goto out; + + writeb(I2C_PCF_STOP, bp->i2c_control_regs + 0x0); + + address |= 0x1; /* READ */ + + writeb(address, bp->i2c_control_regs + 0x1); + writeb(I2C_PCF_START, bp->i2c_control_regs + 0x0); + if (wait_for_pin(bp, &status)) + goto out; + + /* Set PIN back to one so the device sends the first + * byte. + */ + (void) readb(bp->i2c_control_regs + 0x1); + if (wait_for_pin(bp, &status)) + goto out; + + writeb(I2C_PCF_ESO | I2C_PCF_ENI, bp->i2c_control_regs + 0x0); + *byte = readb(bp->i2c_control_regs + 0x1); + if (wait_for_pin(bp, &status)) + goto out; + + ret = 0; + +out: + writeb(I2C_PCF_STOP, bp->i2c_control_regs + 0x0); + (void) readb(bp->i2c_control_regs + 0x1); + + return ret; +} + +int bbc_i2c_write_buf(struct bbc_i2c_client *client, + char *buf, int len, int off) +{ + int ret = 0; + + while (len > 0) { + ret = bbc_i2c_writeb(client, *buf, off); + if (ret < 0) + break; + len--; + buf++; + off++; + } + return ret; +} + +int bbc_i2c_read_buf(struct bbc_i2c_client *client, + char *buf, int len, int off) +{ + int ret = 0; + + while (len > 0) { + ret = bbc_i2c_readb(client, buf, off); + if (ret < 0) + break; + len--; + buf++; + off++; + } + + return ret; +} + +EXPORT_SYMBOL(bbc_i2c_getdev); +EXPORT_SYMBOL(bbc_i2c_attach); +EXPORT_SYMBOL(bbc_i2c_detach); +EXPORT_SYMBOL(bbc_i2c_writeb); +EXPORT_SYMBOL(bbc_i2c_readb); +EXPORT_SYMBOL(bbc_i2c_write_buf); +EXPORT_SYMBOL(bbc_i2c_read_buf); + +static irqreturn_t bbc_i2c_interrupt(int irq, void *dev_id) +{ + struct bbc_i2c_bus *bp = dev_id; + + /* PIN going from set to clear is the only event which + * makes the i2c assert an interrupt. + */ + if (bp->waiting && + !(readb(bp->i2c_control_regs + 0x0) & I2C_PCF_PIN)) + wake_up_interruptible(&bp->wq); + + return IRQ_HANDLED; +} + +static void reset_one_i2c(struct bbc_i2c_bus *bp) +{ + writeb(I2C_PCF_PIN, bp->i2c_control_regs + 0x0); + writeb(bp->own, bp->i2c_control_regs + 0x1); + writeb(I2C_PCF_PIN | I2C_PCF_ES1, bp->i2c_control_regs + 0x0); + writeb(bp->clock, bp->i2c_control_regs + 0x1); + writeb(I2C_PCF_IDLE, bp->i2c_control_regs + 0x0); +} + +static struct bbc_i2c_bus * attach_one_i2c(struct platform_device *op, int index) +{ + struct bbc_i2c_bus *bp; + struct device_node *dp; + int entry; + + bp = kzalloc(sizeof(*bp), GFP_KERNEL); + if (!bp) + return NULL; + + INIT_LIST_HEAD(&bp->temps); + INIT_LIST_HEAD(&bp->fans); + + bp->i2c_control_regs = of_ioremap(&op->resource[0], 0, 0x2, "bbc_i2c_regs"); + if (!bp->i2c_control_regs) + goto fail; + + if (op->num_resources == 2) { + bp->i2c_bussel_reg = of_ioremap(&op->resource[1], 0, 0x1, "bbc_i2c_bussel"); + if (!bp->i2c_bussel_reg) + goto fail; + } + + bp->waiting = 0; + init_waitqueue_head(&bp->wq); + if (request_irq(op->archdata.irqs[0], bbc_i2c_interrupt, + IRQF_SHARED, "bbc_i2c", bp)) + goto fail; + + bp->index = index; + bp->op = op; + + spin_lock_init(&bp->lock); + + entry = 0; + for (dp = op->dev.of_node->child; + dp && entry < 8; + dp = dp->sibling, entry++) { + struct platform_device *child_op; + + child_op = of_find_device_by_node(dp); + bp->devs[entry].device = child_op; + bp->devs[entry].client_claimed = 0; + } + + writeb(I2C_PCF_PIN, bp->i2c_control_regs + 0x0); + bp->own = readb(bp->i2c_control_regs + 0x01); + writeb(I2C_PCF_PIN | I2C_PCF_ES1, bp->i2c_control_regs + 0x0); + bp->clock = readb(bp->i2c_control_regs + 0x01); + + printk(KERN_INFO "i2c-%d: Regs at %p, %d devices, own %02x, clock %02x.\n", + bp->index, bp->i2c_control_regs, entry, bp->own, bp->clock); + + reset_one_i2c(bp); + + return bp; + +fail: + if (bp->i2c_bussel_reg) + of_iounmap(&op->resource[1], bp->i2c_bussel_reg, 1); + if (bp->i2c_control_regs) + of_iounmap(&op->resource[0], bp->i2c_control_regs, 2); + kfree(bp); + return NULL; +} + +extern int bbc_envctrl_init(struct bbc_i2c_bus *bp); +extern void bbc_envctrl_cleanup(struct bbc_i2c_bus *bp); + +static int bbc_i2c_probe(struct platform_device *op) +{ + struct bbc_i2c_bus *bp; + int err, index = 0; + + bp = attach_one_i2c(op, index); + if (!bp) + return -EINVAL; + + err = bbc_envctrl_init(bp); + if (err) { + free_irq(op->archdata.irqs[0], bp); + if (bp->i2c_bussel_reg) + of_iounmap(&op->resource[0], bp->i2c_bussel_reg, 1); + if (bp->i2c_control_regs) + of_iounmap(&op->resource[1], bp->i2c_control_regs, 2); + kfree(bp); + } else { + dev_set_drvdata(&op->dev, bp); + } + + return err; +} + +static int bbc_i2c_remove(struct platform_device *op) +{ + struct bbc_i2c_bus *bp = dev_get_drvdata(&op->dev); + + bbc_envctrl_cleanup(bp); + + free_irq(op->archdata.irqs[0], bp); + + if (bp->i2c_bussel_reg) + of_iounmap(&op->resource[0], bp->i2c_bussel_reg, 1); + if (bp->i2c_control_regs) + of_iounmap(&op->resource[1], bp->i2c_control_regs, 2); + + kfree(bp); + + return 0; +} + +static const struct of_device_id bbc_i2c_match[] = { + { + .name = "i2c", + .compatible = "SUNW,bbc-i2c", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, bbc_i2c_match); + +static struct platform_driver bbc_i2c_driver = { + .driver = { + .name = "bbc_i2c", + .of_match_table = bbc_i2c_match, + }, + .probe = bbc_i2c_probe, + .remove = bbc_i2c_remove, +}; + +module_platform_driver(bbc_i2c_driver); + +MODULE_LICENSE("GPL"); -- cgit v1.2.3