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/nvmem/sprd-efuse.c | 441 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 441 insertions(+) create mode 100644 drivers/nvmem/sprd-efuse.c (limited to 'drivers/nvmem/sprd-efuse.c') diff --git a/drivers/nvmem/sprd-efuse.c b/drivers/nvmem/sprd-efuse.c new file mode 100644 index 000000000..4f1fcbfec --- /dev/null +++ b/drivers/nvmem/sprd-efuse.c @@ -0,0 +1,441 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2019 Spreadtrum Communications Inc. + +#include +#include +#include +#include +#include +#include +#include +#include + +#define SPRD_EFUSE_ENABLE 0x20 +#define SPRD_EFUSE_ERR_FLAG 0x24 +#define SPRD_EFUSE_ERR_CLR 0x28 +#define SPRD_EFUSE_MAGIC_NUM 0x2c +#define SPRD_EFUSE_FW_CFG 0x50 +#define SPRD_EFUSE_PW_SWT 0x54 +#define SPRD_EFUSE_MEM(val) (0x1000 + ((val) << 2)) + +#define SPRD_EFUSE_VDD_EN BIT(0) +#define SPRD_EFUSE_AUTO_CHECK_EN BIT(1) +#define SPRD_EFUSE_DOUBLE_EN BIT(2) +#define SPRD_EFUSE_MARGIN_RD_EN BIT(3) +#define SPRD_EFUSE_LOCK_WR_EN BIT(4) + +#define SPRD_EFUSE_ERR_CLR_MASK GENMASK(13, 0) + +#define SPRD_EFUSE_ENK1_ON BIT(0) +#define SPRD_EFUSE_ENK2_ON BIT(1) +#define SPRD_EFUSE_PROG_EN BIT(2) + +#define SPRD_EFUSE_MAGIC_NUMBER 0x8810 + +/* Block width (bytes) definitions */ +#define SPRD_EFUSE_BLOCK_WIDTH 4 + +/* + * The Spreadtrum AP efuse contains 2 parts: normal efuse and secure efuse, + * and we can only access the normal efuse in kernel. So define the normal + * block offset index and normal block numbers. + */ +#define SPRD_EFUSE_NORMAL_BLOCK_NUMS 24 +#define SPRD_EFUSE_NORMAL_BLOCK_OFFSET 72 + +/* Timeout (ms) for the trylock of hardware spinlocks */ +#define SPRD_EFUSE_HWLOCK_TIMEOUT 5000 + +/* + * Since different Spreadtrum SoC chip can have different normal block numbers + * and offset. And some SoC can support block double feature, which means + * when reading or writing data to efuse memory, the controller can save double + * data in case one data become incorrect after a long period. + * + * Thus we should save them in the device data structure. + */ +struct sprd_efuse_variant_data { + u32 blk_nums; + u32 blk_offset; + bool blk_double; +}; + +struct sprd_efuse { + struct device *dev; + struct clk *clk; + struct hwspinlock *hwlock; + struct mutex mutex; + void __iomem *base; + const struct sprd_efuse_variant_data *data; +}; + +static const struct sprd_efuse_variant_data ums312_data = { + .blk_nums = SPRD_EFUSE_NORMAL_BLOCK_NUMS, + .blk_offset = SPRD_EFUSE_NORMAL_BLOCK_OFFSET, + .blk_double = false, +}; + +/* + * On Spreadtrum platform, we have multi-subsystems will access the unique + * efuse controller, so we need one hardware spinlock to synchronize between + * the multiple subsystems. + */ +static int sprd_efuse_lock(struct sprd_efuse *efuse) +{ + int ret; + + mutex_lock(&efuse->mutex); + + ret = hwspin_lock_timeout_raw(efuse->hwlock, + SPRD_EFUSE_HWLOCK_TIMEOUT); + if (ret) { + dev_err(efuse->dev, "timeout get the hwspinlock\n"); + mutex_unlock(&efuse->mutex); + return ret; + } + + return 0; +} + +static void sprd_efuse_unlock(struct sprd_efuse *efuse) +{ + hwspin_unlock_raw(efuse->hwlock); + mutex_unlock(&efuse->mutex); +} + +static void sprd_efuse_set_prog_power(struct sprd_efuse *efuse, bool en) +{ + u32 val = readl(efuse->base + SPRD_EFUSE_PW_SWT); + + if (en) + val &= ~SPRD_EFUSE_ENK2_ON; + else + val &= ~SPRD_EFUSE_ENK1_ON; + + writel(val, efuse->base + SPRD_EFUSE_PW_SWT); + + /* Open or close efuse power need wait 1000us to make power stable. */ + usleep_range(1000, 1200); + + if (en) + val |= SPRD_EFUSE_ENK1_ON; + else + val |= SPRD_EFUSE_ENK2_ON; + + writel(val, efuse->base + SPRD_EFUSE_PW_SWT); + + /* Open or close efuse power need wait 1000us to make power stable. */ + usleep_range(1000, 1200); +} + +static void sprd_efuse_set_read_power(struct sprd_efuse *efuse, bool en) +{ + u32 val = readl(efuse->base + SPRD_EFUSE_ENABLE); + + if (en) + val |= SPRD_EFUSE_VDD_EN; + else + val &= ~SPRD_EFUSE_VDD_EN; + + writel(val, efuse->base + SPRD_EFUSE_ENABLE); + + /* Open or close efuse power need wait 1000us to make power stable. */ + usleep_range(1000, 1200); +} + +static void sprd_efuse_set_prog_lock(struct sprd_efuse *efuse, bool en) +{ + u32 val = readl(efuse->base + SPRD_EFUSE_ENABLE); + + if (en) + val |= SPRD_EFUSE_LOCK_WR_EN; + else + val &= ~SPRD_EFUSE_LOCK_WR_EN; + + writel(val, efuse->base + SPRD_EFUSE_ENABLE); +} + +static void sprd_efuse_set_auto_check(struct sprd_efuse *efuse, bool en) +{ + u32 val = readl(efuse->base + SPRD_EFUSE_ENABLE); + + if (en) + val |= SPRD_EFUSE_AUTO_CHECK_EN; + else + val &= ~SPRD_EFUSE_AUTO_CHECK_EN; + + writel(val, efuse->base + SPRD_EFUSE_ENABLE); +} + +static void sprd_efuse_set_data_double(struct sprd_efuse *efuse, bool en) +{ + u32 val = readl(efuse->base + SPRD_EFUSE_ENABLE); + + if (en) + val |= SPRD_EFUSE_DOUBLE_EN; + else + val &= ~SPRD_EFUSE_DOUBLE_EN; + + writel(val, efuse->base + SPRD_EFUSE_ENABLE); +} + +static void sprd_efuse_set_prog_en(struct sprd_efuse *efuse, bool en) +{ + u32 val = readl(efuse->base + SPRD_EFUSE_PW_SWT); + + if (en) + val |= SPRD_EFUSE_PROG_EN; + else + val &= ~SPRD_EFUSE_PROG_EN; + + writel(val, efuse->base + SPRD_EFUSE_PW_SWT); +} + +static int sprd_efuse_raw_prog(struct sprd_efuse *efuse, u32 blk, bool doub, + bool lock, u32 *data) +{ + u32 status; + int ret = 0; + + /* + * We need set the correct magic number before writing the efuse to + * allow programming, and block other programming until we clear the + * magic number. + */ + writel(SPRD_EFUSE_MAGIC_NUMBER, + efuse->base + SPRD_EFUSE_MAGIC_NUM); + + /* + * Power on the efuse, enable programme and enable double data + * if asked. + */ + sprd_efuse_set_prog_power(efuse, true); + sprd_efuse_set_prog_en(efuse, true); + sprd_efuse_set_data_double(efuse, doub); + + /* + * Enable the auto-check function to validate if the programming is + * successful. + */ + if (lock) + sprd_efuse_set_auto_check(efuse, true); + + writel(*data, efuse->base + SPRD_EFUSE_MEM(blk)); + + /* Disable auto-check and data double after programming */ + if (lock) + sprd_efuse_set_auto_check(efuse, false); + sprd_efuse_set_data_double(efuse, false); + + /* + * Check the efuse error status, if the programming is successful, + * we should lock this efuse block to avoid programming again. + */ + status = readl(efuse->base + SPRD_EFUSE_ERR_FLAG); + if (status) { + dev_err(efuse->dev, + "write error status %u of block %d\n", status, blk); + + writel(SPRD_EFUSE_ERR_CLR_MASK, + efuse->base + SPRD_EFUSE_ERR_CLR); + ret = -EBUSY; + } else if (lock) { + sprd_efuse_set_prog_lock(efuse, lock); + writel(0, efuse->base + SPRD_EFUSE_MEM(blk)); + sprd_efuse_set_prog_lock(efuse, false); + } + + sprd_efuse_set_prog_power(efuse, false); + writel(0, efuse->base + SPRD_EFUSE_MAGIC_NUM); + + return ret; +} + +static int sprd_efuse_raw_read(struct sprd_efuse *efuse, int blk, u32 *val, + bool doub) +{ + u32 status; + + /* + * Need power on the efuse before reading data from efuse, and will + * power off the efuse after reading process. + */ + sprd_efuse_set_read_power(efuse, true); + + /* Enable double data if asked */ + sprd_efuse_set_data_double(efuse, doub); + + /* Start to read data from efuse block */ + *val = readl(efuse->base + SPRD_EFUSE_MEM(blk)); + + /* Disable double data */ + sprd_efuse_set_data_double(efuse, false); + + /* Power off the efuse */ + sprd_efuse_set_read_power(efuse, false); + + /* + * Check the efuse error status and clear them if there are some + * errors occurred. + */ + status = readl(efuse->base + SPRD_EFUSE_ERR_FLAG); + if (status) { + dev_err(efuse->dev, + "read error status %d of block %d\n", status, blk); + + writel(SPRD_EFUSE_ERR_CLR_MASK, + efuse->base + SPRD_EFUSE_ERR_CLR); + return -EBUSY; + } + + return 0; +} + +static int sprd_efuse_read(void *context, u32 offset, void *val, size_t bytes) +{ + struct sprd_efuse *efuse = context; + bool blk_double = efuse->data->blk_double; + u32 index = offset / SPRD_EFUSE_BLOCK_WIDTH + efuse->data->blk_offset; + u32 blk_offset = (offset % SPRD_EFUSE_BLOCK_WIDTH) * BITS_PER_BYTE; + u32 data; + int ret; + + ret = sprd_efuse_lock(efuse); + if (ret) + return ret; + + ret = clk_prepare_enable(efuse->clk); + if (ret) + goto unlock; + + ret = sprd_efuse_raw_read(efuse, index, &data, blk_double); + if (!ret) { + data >>= blk_offset; + memcpy(val, &data, bytes); + } + + clk_disable_unprepare(efuse->clk); + +unlock: + sprd_efuse_unlock(efuse); + return ret; +} + +static int sprd_efuse_write(void *context, u32 offset, void *val, size_t bytes) +{ + struct sprd_efuse *efuse = context; + bool blk_double = efuse->data->blk_double; + bool lock; + int ret; + + ret = sprd_efuse_lock(efuse); + if (ret) + return ret; + + ret = clk_prepare_enable(efuse->clk); + if (ret) + goto unlock; + + /* + * If the writing bytes are equal with the block width, which means the + * whole block will be programmed. For this case, we should not allow + * this block to be programmed again by locking this block. + * + * If the block was programmed partially, we should allow this block to + * be programmed again. + */ + if (bytes < SPRD_EFUSE_BLOCK_WIDTH) + lock = false; + else + lock = true; + + ret = sprd_efuse_raw_prog(efuse, offset, blk_double, lock, val); + + clk_disable_unprepare(efuse->clk); + +unlock: + sprd_efuse_unlock(efuse); + return ret; +} + +static int sprd_efuse_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct nvmem_device *nvmem; + struct nvmem_config econfig = { }; + struct sprd_efuse *efuse; + const struct sprd_efuse_variant_data *pdata; + int ret; + + pdata = of_device_get_match_data(&pdev->dev); + if (!pdata) { + dev_err(&pdev->dev, "No matching driver data found\n"); + return -EINVAL; + } + + efuse = devm_kzalloc(&pdev->dev, sizeof(*efuse), GFP_KERNEL); + if (!efuse) + return -ENOMEM; + + efuse->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(efuse->base)) + return PTR_ERR(efuse->base); + + ret = of_hwspin_lock_get_id(np, 0); + if (ret < 0) { + dev_err(&pdev->dev, "failed to get hwlock id\n"); + return ret; + } + + efuse->hwlock = devm_hwspin_lock_request_specific(&pdev->dev, ret); + if (!efuse->hwlock) { + dev_err(&pdev->dev, "failed to request hwlock\n"); + return -ENXIO; + } + + efuse->clk = devm_clk_get(&pdev->dev, "enable"); + if (IS_ERR(efuse->clk)) { + dev_err(&pdev->dev, "failed to get enable clock\n"); + return PTR_ERR(efuse->clk); + } + + mutex_init(&efuse->mutex); + efuse->dev = &pdev->dev; + efuse->data = pdata; + + econfig.stride = 1; + econfig.word_size = 1; + econfig.read_only = false; + econfig.name = "sprd-efuse"; + econfig.size = efuse->data->blk_nums * SPRD_EFUSE_BLOCK_WIDTH; + econfig.reg_read = sprd_efuse_read; + econfig.reg_write = sprd_efuse_write; + econfig.priv = efuse; + econfig.dev = &pdev->dev; + nvmem = devm_nvmem_register(&pdev->dev, &econfig); + if (IS_ERR(nvmem)) { + dev_err(&pdev->dev, "failed to register nvmem\n"); + return PTR_ERR(nvmem); + } + + return 0; +} + +static const struct of_device_id sprd_efuse_of_match[] = { + { .compatible = "sprd,ums312-efuse", .data = &ums312_data }, + { } +}; + +static struct platform_driver sprd_efuse_driver = { + .probe = sprd_efuse_probe, + .driver = { + .name = "sprd-efuse", + .of_match_table = sprd_efuse_of_match, + }, +}; + +module_platform_driver(sprd_efuse_driver); + +MODULE_AUTHOR("Freeman Liu "); +MODULE_DESCRIPTION("Spreadtrum AP efuse driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3