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/crypto/hisilicon/trng/trng.c | 341 +++++++++++++++++++++++++++++++++++ 1 file changed, 341 insertions(+) create mode 100644 drivers/crypto/hisilicon/trng/trng.c (limited to 'drivers/crypto/hisilicon/trng/trng.c') diff --git a/drivers/crypto/hisilicon/trng/trng.c b/drivers/crypto/hisilicon/trng/trng.c new file mode 100644 index 000000000..97e500db0 --- /dev/null +++ b/drivers/crypto/hisilicon/trng/trng.c @@ -0,0 +1,341 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2019 HiSilicon Limited. */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define HISI_TRNG_REG 0x00F0 +#define HISI_TRNG_BYTES 4 +#define HISI_TRNG_QUALITY 512 +#define HISI_TRNG_VERSION 0x01B8 +#define HISI_TRNG_VER_V1 GENMASK(31, 0) +#define SLEEP_US 10 +#define TIMEOUT_US 10000 +#define SW_DRBG_NUM_SHIFT 2 +#define SW_DRBG_KEY_BASE 0x082C +#define SW_DRBG_SEED(n) (SW_DRBG_KEY_BASE - ((n) << SW_DRBG_NUM_SHIFT)) +#define SW_DRBG_SEED_REGS_NUM 12 +#define SW_DRBG_SEED_SIZE 48 +#define SW_DRBG_BLOCKS 0x0830 +#define SW_DRBG_INIT 0x0834 +#define SW_DRBG_GEN 0x083c +#define SW_DRBG_STATUS 0x0840 +#define SW_DRBG_BLOCKS_NUM 4095 +#define SW_DRBG_DATA_BASE 0x0850 +#define SW_DRBG_DATA_NUM 4 +#define SW_DRBG_DATA(n) (SW_DRBG_DATA_BASE - ((n) << SW_DRBG_NUM_SHIFT)) +#define SW_DRBG_BYTES 16 +#define SW_DRBG_ENABLE_SHIFT 12 +#define SEED_SHIFT_24 24 +#define SEED_SHIFT_16 16 +#define SEED_SHIFT_8 8 + +struct hisi_trng_list { + struct mutex lock; + struct list_head list; + bool is_init; +}; + +struct hisi_trng { + void __iomem *base; + struct hisi_trng_list *trng_list; + struct list_head list; + struct hwrng rng; + u32 ver; + bool is_used; + struct mutex mutex; +}; + +struct hisi_trng_ctx { + struct hisi_trng *trng; +}; + +static atomic_t trng_active_devs; +static struct hisi_trng_list trng_devices; + +static void hisi_trng_set_seed(struct hisi_trng *trng, const u8 *seed) +{ + u32 val, seed_reg, i; + + for (i = 0; i < SW_DRBG_SEED_SIZE; + i += SW_DRBG_SEED_SIZE / SW_DRBG_SEED_REGS_NUM) { + val = seed[i] << SEED_SHIFT_24; + val |= seed[i + 1UL] << SEED_SHIFT_16; + val |= seed[i + 2UL] << SEED_SHIFT_8; + val |= seed[i + 3UL]; + + seed_reg = (i >> SW_DRBG_NUM_SHIFT) % SW_DRBG_SEED_REGS_NUM; + writel(val, trng->base + SW_DRBG_SEED(seed_reg)); + } +} + +static int hisi_trng_seed(struct crypto_rng *tfm, const u8 *seed, + unsigned int slen) +{ + struct hisi_trng_ctx *ctx = crypto_rng_ctx(tfm); + struct hisi_trng *trng = ctx->trng; + u32 val = 0; + int ret = 0; + + if (slen < SW_DRBG_SEED_SIZE) { + pr_err("slen(%u) is not matched with trng(%d)\n", slen, + SW_DRBG_SEED_SIZE); + return -EINVAL; + } + + writel(0x0, trng->base + SW_DRBG_BLOCKS); + hisi_trng_set_seed(trng, seed); + + writel(SW_DRBG_BLOCKS_NUM | (0x1 << SW_DRBG_ENABLE_SHIFT), + trng->base + SW_DRBG_BLOCKS); + writel(0x1, trng->base + SW_DRBG_INIT); + + ret = readl_relaxed_poll_timeout(trng->base + SW_DRBG_STATUS, + val, val & BIT(0), SLEEP_US, TIMEOUT_US); + if (ret) + pr_err("fail to init trng(%d)\n", ret); + + return ret; +} + +static int hisi_trng_generate(struct crypto_rng *tfm, const u8 *src, + unsigned int slen, u8 *dstn, unsigned int dlen) +{ + struct hisi_trng_ctx *ctx = crypto_rng_ctx(tfm); + struct hisi_trng *trng = ctx->trng; + u32 data[SW_DRBG_DATA_NUM]; + u32 currsize = 0; + u32 val = 0; + int ret; + u32 i; + + if (dlen > SW_DRBG_BLOCKS_NUM * SW_DRBG_BYTES || dlen == 0) { + pr_err("dlen(%d) exceeds limit(%d)!\n", dlen, + SW_DRBG_BLOCKS_NUM * SW_DRBG_BYTES); + return -EINVAL; + } + + do { + ret = readl_relaxed_poll_timeout(trng->base + SW_DRBG_STATUS, + val, val & BIT(1), SLEEP_US, TIMEOUT_US); + if (ret) { + pr_err("fail to generate random number(%d)!\n", ret); + break; + } + + for (i = 0; i < SW_DRBG_DATA_NUM; i++) + data[i] = readl(trng->base + SW_DRBG_DATA(i)); + + if (dlen - currsize >= SW_DRBG_BYTES) { + memcpy(dstn + currsize, data, SW_DRBG_BYTES); + currsize += SW_DRBG_BYTES; + } else { + memcpy(dstn + currsize, data, dlen - currsize); + currsize = dlen; + } + + writel(0x1, trng->base + SW_DRBG_GEN); + } while (currsize < dlen); + + return ret; +} + +static int hisi_trng_init(struct crypto_tfm *tfm) +{ + struct hisi_trng_ctx *ctx = crypto_tfm_ctx(tfm); + struct hisi_trng *trng; + int ret = -EBUSY; + + mutex_lock(&trng_devices.lock); + list_for_each_entry(trng, &trng_devices.list, list) { + if (!trng->is_used) { + trng->is_used = true; + ctx->trng = trng; + ret = 0; + break; + } + } + mutex_unlock(&trng_devices.lock); + + return ret; +} + +static void hisi_trng_exit(struct crypto_tfm *tfm) +{ + struct hisi_trng_ctx *ctx = crypto_tfm_ctx(tfm); + + mutex_lock(&trng_devices.lock); + ctx->trng->is_used = false; + mutex_unlock(&trng_devices.lock); +} + +static int hisi_trng_read(struct hwrng *rng, void *buf, size_t max, bool wait) +{ + struct hisi_trng *trng; + int currsize = 0; + u32 val = 0; + int ret; + + trng = container_of(rng, struct hisi_trng, rng); + + do { + ret = readl_poll_timeout(trng->base + HISI_TRNG_REG, val, + val, SLEEP_US, TIMEOUT_US); + if (ret) + return currsize; + + if (max - currsize >= HISI_TRNG_BYTES) { + memcpy(buf + currsize, &val, HISI_TRNG_BYTES); + currsize += HISI_TRNG_BYTES; + if (currsize == max) + return currsize; + continue; + } + + /* copy remaining bytes */ + memcpy(buf + currsize, &val, max - currsize); + currsize = max; + } while (currsize < max); + + return currsize; +} + +static struct rng_alg hisi_trng_alg = { + .generate = hisi_trng_generate, + .seed = hisi_trng_seed, + .seedsize = SW_DRBG_SEED_SIZE, + .base = { + .cra_name = "stdrng", + .cra_driver_name = "hisi_stdrng", + .cra_priority = 300, + .cra_ctxsize = sizeof(struct hisi_trng_ctx), + .cra_module = THIS_MODULE, + .cra_init = hisi_trng_init, + .cra_exit = hisi_trng_exit, + }, +}; + +static void hisi_trng_add_to_list(struct hisi_trng *trng) +{ + mutex_lock(&trng_devices.lock); + list_add_tail(&trng->list, &trng_devices.list); + mutex_unlock(&trng_devices.lock); +} + +static int hisi_trng_del_from_list(struct hisi_trng *trng) +{ + int ret = -EBUSY; + + mutex_lock(&trng_devices.lock); + if (!trng->is_used) { + list_del(&trng->list); + ret = 0; + } + mutex_unlock(&trng_devices.lock); + + return ret; +} + +static int hisi_trng_probe(struct platform_device *pdev) +{ + struct hisi_trng *trng; + int ret; + + trng = devm_kzalloc(&pdev->dev, sizeof(*trng), GFP_KERNEL); + if (!trng) + return -ENOMEM; + + platform_set_drvdata(pdev, trng); + + trng->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(trng->base)) + return PTR_ERR(trng->base); + + trng->is_used = false; + trng->ver = readl(trng->base + HISI_TRNG_VERSION); + if (!trng_devices.is_init) { + INIT_LIST_HEAD(&trng_devices.list); + mutex_init(&trng_devices.lock); + trng_devices.is_init = true; + } + + hisi_trng_add_to_list(trng); + if (trng->ver != HISI_TRNG_VER_V1 && + atomic_inc_return(&trng_active_devs) == 1) { + ret = crypto_register_rng(&hisi_trng_alg); + if (ret) { + dev_err(&pdev->dev, + "failed to register crypto(%d)\n", ret); + atomic_dec_return(&trng_active_devs); + goto err_remove_from_list; + } + } + + trng->rng.name = pdev->name; + trng->rng.read = hisi_trng_read; + trng->rng.quality = HISI_TRNG_QUALITY; + ret = devm_hwrng_register(&pdev->dev, &trng->rng); + if (ret) { + dev_err(&pdev->dev, "failed to register hwrng: %d!\n", ret); + goto err_crypto_unregister; + } + + return ret; + +err_crypto_unregister: + if (trng->ver != HISI_TRNG_VER_V1 && + atomic_dec_return(&trng_active_devs) == 0) + crypto_unregister_rng(&hisi_trng_alg); + +err_remove_from_list: + hisi_trng_del_from_list(trng); + return ret; +} + +static int hisi_trng_remove(struct platform_device *pdev) +{ + struct hisi_trng *trng = platform_get_drvdata(pdev); + + /* Wait until the task is finished */ + while (hisi_trng_del_from_list(trng)) + ; + + if (trng->ver != HISI_TRNG_VER_V1 && + atomic_dec_return(&trng_active_devs) == 0) + crypto_unregister_rng(&hisi_trng_alg); + + return 0; +} + +static const struct acpi_device_id hisi_trng_acpi_match[] = { + { "HISI02B3", 0 }, + { } +}; +MODULE_DEVICE_TABLE(acpi, hisi_trng_acpi_match); + +static struct platform_driver hisi_trng_driver = { + .probe = hisi_trng_probe, + .remove = hisi_trng_remove, + .driver = { + .name = "hisi-trng-v2", + .acpi_match_table = ACPI_PTR(hisi_trng_acpi_match), + }, +}; + +module_platform_driver(hisi_trng_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Weili Qian "); +MODULE_AUTHOR("Zaibo Xu "); +MODULE_DESCRIPTION("HiSilicon true random number generator V2 driver"); -- cgit v1.2.3