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/char/hw_random/ks-sa-rng.c | 285 +++++++++++++++++++++++++++++++++++++ 1 file changed, 285 insertions(+) create mode 100644 drivers/char/hw_random/ks-sa-rng.c (limited to 'drivers/char/hw_random/ks-sa-rng.c') diff --git a/drivers/char/hw_random/ks-sa-rng.c b/drivers/char/hw_random/ks-sa-rng.c new file mode 100644 index 000000000..2f2f21f1b --- /dev/null +++ b/drivers/char/hw_random/ks-sa-rng.c @@ -0,0 +1,285 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Random Number Generator driver for the Keystone SOC + * + * Copyright (C) 2016 Texas Instruments Incorporated - https://www.ti.com + * + * Authors: Sandeep Nair + * Vitaly Andrianov + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define SA_CMD_STATUS_OFS 0x8 + +/* TRNG enable control in SA System module*/ +#define SA_CMD_STATUS_REG_TRNG_ENABLE BIT(3) + +/* TRNG start control in TRNG module */ +#define TRNG_CNTL_REG_TRNG_ENABLE BIT(10) + +/* Data ready indicator in STATUS register */ +#define TRNG_STATUS_REG_READY BIT(0) + +/* Data ready clear control in INTACK register */ +#define TRNG_INTACK_REG_READY BIT(0) + +/* + * Number of samples taken to gather entropy during startup. + * If value is 0, the number of samples is 2^24 else + * equals value times 2^8. + */ +#define TRNG_DEF_STARTUP_CYCLES 0 +#define TRNG_CNTL_REG_STARTUP_CYCLES_SHIFT 16 + +/* + * Minimum number of samples taken to regenerate entropy + * If value is 0, the number of samples is 2^24 else + * equals value times 2^6. + */ +#define TRNG_DEF_MIN_REFILL_CYCLES 1 +#define TRNG_CFG_REG_MIN_REFILL_CYCLES_SHIFT 0 + +/* + * Maximum number of samples taken to regenerate entropy + * If value is 0, the number of samples is 2^24 else + * equals value times 2^8. + */ +#define TRNG_DEF_MAX_REFILL_CYCLES 0 +#define TRNG_CFG_REG_MAX_REFILL_CYCLES_SHIFT 16 + +/* Number of CLK input cycles between samples */ +#define TRNG_DEF_CLK_DIV_CYCLES 0 +#define TRNG_CFG_REG_SAMPLE_DIV_SHIFT 8 + +/* Maximum retries to get rng data */ +#define SA_MAX_RNG_DATA_RETRIES 5 +/* Delay between retries (in usecs) */ +#define SA_RNG_DATA_RETRY_DELAY 5 + +struct trng_regs { + u32 output_l; + u32 output_h; + u32 status; + u32 intmask; + u32 intack; + u32 control; + u32 config; +}; + +struct ks_sa_rng { + struct device *dev; + struct hwrng rng; + struct clk *clk; + struct regmap *regmap_cfg; + struct trng_regs __iomem *reg_rng; + u64 ready_ts; + unsigned int refill_delay_ns; +}; + +static unsigned int cycles_to_ns(unsigned long clk_rate, unsigned int cycles) +{ + return DIV_ROUND_UP_ULL((TRNG_DEF_CLK_DIV_CYCLES + 1) * 1000000000ull * + cycles, clk_rate); +} + +static unsigned int startup_delay_ns(unsigned long clk_rate) +{ + if (!TRNG_DEF_STARTUP_CYCLES) + return cycles_to_ns(clk_rate, BIT(24)); + return cycles_to_ns(clk_rate, 256 * TRNG_DEF_STARTUP_CYCLES); +} + +static unsigned int refill_delay_ns(unsigned long clk_rate) +{ + if (!TRNG_DEF_MAX_REFILL_CYCLES) + return cycles_to_ns(clk_rate, BIT(24)); + return cycles_to_ns(clk_rate, 256 * TRNG_DEF_MAX_REFILL_CYCLES); +} + +static int ks_sa_rng_init(struct hwrng *rng) +{ + u32 value; + struct device *dev = (struct device *)rng->priv; + struct ks_sa_rng *ks_sa_rng = dev_get_drvdata(dev); + unsigned long clk_rate = clk_get_rate(ks_sa_rng->clk); + + /* Enable RNG module */ + regmap_write_bits(ks_sa_rng->regmap_cfg, SA_CMD_STATUS_OFS, + SA_CMD_STATUS_REG_TRNG_ENABLE, + SA_CMD_STATUS_REG_TRNG_ENABLE); + + /* Configure RNG module */ + writel(0, &ks_sa_rng->reg_rng->control); + value = TRNG_DEF_STARTUP_CYCLES << TRNG_CNTL_REG_STARTUP_CYCLES_SHIFT; + writel(value, &ks_sa_rng->reg_rng->control); + + value = (TRNG_DEF_MIN_REFILL_CYCLES << + TRNG_CFG_REG_MIN_REFILL_CYCLES_SHIFT) | + (TRNG_DEF_MAX_REFILL_CYCLES << + TRNG_CFG_REG_MAX_REFILL_CYCLES_SHIFT) | + (TRNG_DEF_CLK_DIV_CYCLES << + TRNG_CFG_REG_SAMPLE_DIV_SHIFT); + + writel(value, &ks_sa_rng->reg_rng->config); + + /* Disable all interrupts from TRNG */ + writel(0, &ks_sa_rng->reg_rng->intmask); + + /* Enable RNG */ + value = readl(&ks_sa_rng->reg_rng->control); + value |= TRNG_CNTL_REG_TRNG_ENABLE; + writel(value, &ks_sa_rng->reg_rng->control); + + ks_sa_rng->refill_delay_ns = refill_delay_ns(clk_rate); + ks_sa_rng->ready_ts = ktime_get_ns() + + startup_delay_ns(clk_rate); + + return 0; +} + +static void ks_sa_rng_cleanup(struct hwrng *rng) +{ + struct device *dev = (struct device *)rng->priv; + struct ks_sa_rng *ks_sa_rng = dev_get_drvdata(dev); + + /* Disable RNG */ + writel(0, &ks_sa_rng->reg_rng->control); + regmap_write_bits(ks_sa_rng->regmap_cfg, SA_CMD_STATUS_OFS, + SA_CMD_STATUS_REG_TRNG_ENABLE, 0); +} + +static int ks_sa_rng_data_read(struct hwrng *rng, u32 *data) +{ + struct device *dev = (struct device *)rng->priv; + struct ks_sa_rng *ks_sa_rng = dev_get_drvdata(dev); + + /* Read random data */ + data[0] = readl(&ks_sa_rng->reg_rng->output_l); + data[1] = readl(&ks_sa_rng->reg_rng->output_h); + + writel(TRNG_INTACK_REG_READY, &ks_sa_rng->reg_rng->intack); + ks_sa_rng->ready_ts = ktime_get_ns() + ks_sa_rng->refill_delay_ns; + + return sizeof(u32) * 2; +} + +static int ks_sa_rng_data_present(struct hwrng *rng, int wait) +{ + struct device *dev = (struct device *)rng->priv; + struct ks_sa_rng *ks_sa_rng = dev_get_drvdata(dev); + u64 now = ktime_get_ns(); + + u32 ready; + int j; + + if (wait && now < ks_sa_rng->ready_ts) { + /* Max delay expected here is 81920000 ns */ + unsigned long min_delay = + DIV_ROUND_UP((u32)(ks_sa_rng->ready_ts - now), 1000); + + usleep_range(min_delay, min_delay + SA_RNG_DATA_RETRY_DELAY); + } + + for (j = 0; j < SA_MAX_RNG_DATA_RETRIES; j++) { + ready = readl(&ks_sa_rng->reg_rng->status); + ready &= TRNG_STATUS_REG_READY; + + if (ready || !wait) + break; + + udelay(SA_RNG_DATA_RETRY_DELAY); + } + + return ready; +} + +static int ks_sa_rng_probe(struct platform_device *pdev) +{ + struct ks_sa_rng *ks_sa_rng; + struct device *dev = &pdev->dev; + int ret; + + ks_sa_rng = devm_kzalloc(dev, sizeof(*ks_sa_rng), GFP_KERNEL); + if (!ks_sa_rng) + return -ENOMEM; + + ks_sa_rng->dev = dev; + ks_sa_rng->rng = (struct hwrng) { + .name = "ks_sa_hwrng", + .init = ks_sa_rng_init, + .data_read = ks_sa_rng_data_read, + .data_present = ks_sa_rng_data_present, + .cleanup = ks_sa_rng_cleanup, + }; + ks_sa_rng->rng.priv = (unsigned long)dev; + + ks_sa_rng->reg_rng = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(ks_sa_rng->reg_rng)) + return PTR_ERR(ks_sa_rng->reg_rng); + + ks_sa_rng->regmap_cfg = + syscon_regmap_lookup_by_phandle(dev->of_node, + "ti,syscon-sa-cfg"); + + if (IS_ERR(ks_sa_rng->regmap_cfg)) { + dev_err(dev, "syscon_node_to_regmap failed\n"); + return -EINVAL; + } + + pm_runtime_enable(dev); + ret = pm_runtime_resume_and_get(dev); + if (ret < 0) { + dev_err(dev, "Failed to enable SA power-domain\n"); + pm_runtime_disable(dev); + return ret; + } + + platform_set_drvdata(pdev, ks_sa_rng); + + return devm_hwrng_register(&pdev->dev, &ks_sa_rng->rng); +} + +static int ks_sa_rng_remove(struct platform_device *pdev) +{ + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static const struct of_device_id ks_sa_rng_dt_match[] = { + { + .compatible = "ti,keystone-rng", + }, + { }, +}; +MODULE_DEVICE_TABLE(of, ks_sa_rng_dt_match); + +static struct platform_driver ks_sa_rng_driver = { + .driver = { + .name = "ks-sa-rng", + .of_match_table = ks_sa_rng_dt_match, + }, + .probe = ks_sa_rng_probe, + .remove = ks_sa_rng_remove, +}; + +module_platform_driver(ks_sa_rng_driver); + +MODULE_DESCRIPTION("Keystone NETCP SA H/W Random Number Generator driver"); +MODULE_AUTHOR("Vitaly Andrianov "); +MODULE_LICENSE("GPL"); -- cgit v1.2.3