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/firmware/imx/imx-scu.c | 361 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 361 insertions(+) create mode 100644 drivers/firmware/imx/imx-scu.c (limited to 'drivers/firmware/imx/imx-scu.c') diff --git a/drivers/firmware/imx/imx-scu.c b/drivers/firmware/imx/imx-scu.c new file mode 100644 index 000000000..dca79cacc --- /dev/null +++ b/drivers/firmware/imx/imx-scu.c @@ -0,0 +1,361 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2018 NXP + * Author: Dong Aisheng + * + * Implementation of the SCU IPC functions using MUs (client side). + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define SCU_MU_CHAN_NUM 8 +#define MAX_RX_TIMEOUT (msecs_to_jiffies(30)) + +struct imx_sc_chan { + struct imx_sc_ipc *sc_ipc; + + struct mbox_client cl; + struct mbox_chan *ch; + int idx; + struct completion tx_done; +}; + +struct imx_sc_ipc { + /* SCU uses 4 Tx and 4 Rx channels */ + struct imx_sc_chan chans[SCU_MU_CHAN_NUM]; + struct device *dev; + struct mutex lock; + struct completion done; + bool fast_ipc; + + /* temporarily store the SCU msg */ + u32 *msg; + u8 rx_size; + u8 count; +}; + +/* + * This type is used to indicate error response for most functions. + */ +enum imx_sc_error_codes { + IMX_SC_ERR_NONE = 0, /* Success */ + IMX_SC_ERR_VERSION = 1, /* Incompatible API version */ + IMX_SC_ERR_CONFIG = 2, /* Configuration error */ + IMX_SC_ERR_PARM = 3, /* Bad parameter */ + IMX_SC_ERR_NOACCESS = 4, /* Permission error (no access) */ + IMX_SC_ERR_LOCKED = 5, /* Permission error (locked) */ + IMX_SC_ERR_UNAVAILABLE = 6, /* Unavailable (out of resources) */ + IMX_SC_ERR_NOTFOUND = 7, /* Not found */ + IMX_SC_ERR_NOPOWER = 8, /* No power */ + IMX_SC_ERR_IPC = 9, /* Generic IPC error */ + IMX_SC_ERR_BUSY = 10, /* Resource is currently busy/active */ + IMX_SC_ERR_FAIL = 11, /* General I/O failure */ + IMX_SC_ERR_LAST +}; + +static int imx_sc_linux_errmap[IMX_SC_ERR_LAST] = { + 0, /* IMX_SC_ERR_NONE */ + -EINVAL, /* IMX_SC_ERR_VERSION */ + -EINVAL, /* IMX_SC_ERR_CONFIG */ + -EINVAL, /* IMX_SC_ERR_PARM */ + -EACCES, /* IMX_SC_ERR_NOACCESS */ + -EACCES, /* IMX_SC_ERR_LOCKED */ + -ERANGE, /* IMX_SC_ERR_UNAVAILABLE */ + -EEXIST, /* IMX_SC_ERR_NOTFOUND */ + -EPERM, /* IMX_SC_ERR_NOPOWER */ + -EPIPE, /* IMX_SC_ERR_IPC */ + -EBUSY, /* IMX_SC_ERR_BUSY */ + -EIO, /* IMX_SC_ERR_FAIL */ +}; + +static struct imx_sc_ipc *imx_sc_ipc_handle; + +static inline int imx_sc_to_linux_errno(int errno) +{ + if (errno >= IMX_SC_ERR_NONE && errno < IMX_SC_ERR_LAST) + return imx_sc_linux_errmap[errno]; + return -EIO; +} + +/* + * Get the default handle used by SCU + */ +int imx_scu_get_handle(struct imx_sc_ipc **ipc) +{ + if (!imx_sc_ipc_handle) + return -EPROBE_DEFER; + + *ipc = imx_sc_ipc_handle; + return 0; +} +EXPORT_SYMBOL(imx_scu_get_handle); + +/* Callback called when the word of a message is ack-ed, eg read by SCU */ +static void imx_scu_tx_done(struct mbox_client *cl, void *mssg, int r) +{ + struct imx_sc_chan *sc_chan = container_of(cl, struct imx_sc_chan, cl); + + complete(&sc_chan->tx_done); +} + +static void imx_scu_rx_callback(struct mbox_client *c, void *msg) +{ + struct imx_sc_chan *sc_chan = container_of(c, struct imx_sc_chan, cl); + struct imx_sc_ipc *sc_ipc = sc_chan->sc_ipc; + struct imx_sc_rpc_msg *hdr; + u32 *data = msg; + int i; + + if (!sc_ipc->msg) { + dev_warn(sc_ipc->dev, "unexpected rx idx %d 0x%08x, ignore!\n", + sc_chan->idx, *data); + return; + } + + if (sc_ipc->fast_ipc) { + hdr = msg; + sc_ipc->rx_size = hdr->size; + sc_ipc->msg[0] = *data++; + + for (i = 1; i < sc_ipc->rx_size; i++) + sc_ipc->msg[i] = *data++; + + complete(&sc_ipc->done); + + return; + } + + if (sc_chan->idx == 0) { + hdr = msg; + sc_ipc->rx_size = hdr->size; + dev_dbg(sc_ipc->dev, "msg rx size %u\n", sc_ipc->rx_size); + if (sc_ipc->rx_size > 4) + dev_warn(sc_ipc->dev, "RPC does not support receiving over 4 words: %u\n", + sc_ipc->rx_size); + } + + sc_ipc->msg[sc_chan->idx] = *data; + sc_ipc->count++; + + dev_dbg(sc_ipc->dev, "mu %u msg %u 0x%x\n", sc_chan->idx, + sc_ipc->count, *data); + + if ((sc_ipc->rx_size != 0) && (sc_ipc->count == sc_ipc->rx_size)) + complete(&sc_ipc->done); +} + +static int imx_scu_ipc_write(struct imx_sc_ipc *sc_ipc, void *msg) +{ + struct imx_sc_rpc_msg hdr = *(struct imx_sc_rpc_msg *)msg; + struct imx_sc_chan *sc_chan; + u32 *data = msg; + int ret; + int size; + int i; + + /* Check size */ + if (hdr.size > IMX_SC_RPC_MAX_MSG) + return -EINVAL; + + dev_dbg(sc_ipc->dev, "RPC SVC %u FUNC %u SIZE %u\n", hdr.svc, + hdr.func, hdr.size); + + size = sc_ipc->fast_ipc ? 1 : hdr.size; + for (i = 0; i < size; i++) { + sc_chan = &sc_ipc->chans[i % 4]; + + /* + * SCU requires that all messages words are written + * sequentially but linux MU driver implements multiple + * independent channels for each register so ordering between + * different channels must be ensured by SCU API interface. + * + * Wait for tx_done before every send to ensure that no + * queueing happens at the mailbox channel level. + */ + if (!sc_ipc->fast_ipc) { + wait_for_completion(&sc_chan->tx_done); + reinit_completion(&sc_chan->tx_done); + } + + ret = mbox_send_message(sc_chan->ch, &data[i]); + if (ret < 0) + return ret; + } + + return 0; +} + +/* + * RPC command/response + */ +int imx_scu_call_rpc(struct imx_sc_ipc *sc_ipc, void *msg, bool have_resp) +{ + uint8_t saved_svc, saved_func; + struct imx_sc_rpc_msg *hdr; + int ret; + + if (WARN_ON(!sc_ipc || !msg)) + return -EINVAL; + + mutex_lock(&sc_ipc->lock); + reinit_completion(&sc_ipc->done); + + if (have_resp) { + sc_ipc->msg = msg; + saved_svc = ((struct imx_sc_rpc_msg *)msg)->svc; + saved_func = ((struct imx_sc_rpc_msg *)msg)->func; + } + sc_ipc->count = 0; + ret = imx_scu_ipc_write(sc_ipc, msg); + if (ret < 0) { + dev_err(sc_ipc->dev, "RPC send msg failed: %d\n", ret); + goto out; + } + + if (have_resp) { + if (!wait_for_completion_timeout(&sc_ipc->done, + MAX_RX_TIMEOUT)) { + dev_err(sc_ipc->dev, "RPC send msg timeout\n"); + mutex_unlock(&sc_ipc->lock); + return -ETIMEDOUT; + } + + /* response status is stored in hdr->func field */ + hdr = msg; + ret = hdr->func; + /* + * Some special SCU firmware APIs do NOT have return value + * in hdr->func, but they do have response data, those special + * APIs are defined as void function in SCU firmware, so they + * should be treated as return success always. + */ + if ((saved_svc == IMX_SC_RPC_SVC_MISC) && + (saved_func == IMX_SC_MISC_FUNC_UNIQUE_ID || + saved_func == IMX_SC_MISC_FUNC_GET_BUTTON_STATUS)) + ret = 0; + } + +out: + sc_ipc->msg = NULL; + mutex_unlock(&sc_ipc->lock); + + dev_dbg(sc_ipc->dev, "RPC SVC done\n"); + + return imx_sc_to_linux_errno(ret); +} +EXPORT_SYMBOL(imx_scu_call_rpc); + +static int imx_scu_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct imx_sc_ipc *sc_ipc; + struct imx_sc_chan *sc_chan; + struct mbox_client *cl; + char *chan_name; + struct of_phandle_args args; + int num_channel; + int ret; + int i; + + sc_ipc = devm_kzalloc(dev, sizeof(*sc_ipc), GFP_KERNEL); + if (!sc_ipc) + return -ENOMEM; + + ret = of_parse_phandle_with_args(pdev->dev.of_node, "mboxes", + "#mbox-cells", 0, &args); + if (ret) + return ret; + + sc_ipc->fast_ipc = of_device_is_compatible(args.np, "fsl,imx8-mu-scu"); + + num_channel = sc_ipc->fast_ipc ? 2 : SCU_MU_CHAN_NUM; + for (i = 0; i < num_channel; i++) { + if (i < num_channel / 2) + chan_name = kasprintf(GFP_KERNEL, "tx%d", i); + else + chan_name = kasprintf(GFP_KERNEL, "rx%d", + i - num_channel / 2); + + if (!chan_name) + return -ENOMEM; + + sc_chan = &sc_ipc->chans[i]; + cl = &sc_chan->cl; + cl->dev = dev; + cl->tx_block = false; + cl->knows_txdone = true; + cl->rx_callback = imx_scu_rx_callback; + + if (!sc_ipc->fast_ipc) { + /* Initial tx_done completion as "done" */ + cl->tx_done = imx_scu_tx_done; + init_completion(&sc_chan->tx_done); + complete(&sc_chan->tx_done); + } + + sc_chan->sc_ipc = sc_ipc; + sc_chan->idx = i % (num_channel / 2); + sc_chan->ch = mbox_request_channel_byname(cl, chan_name); + if (IS_ERR(sc_chan->ch)) { + ret = PTR_ERR(sc_chan->ch); + if (ret != -EPROBE_DEFER) + dev_err(dev, "Failed to request mbox chan %s ret %d\n", + chan_name, ret); + kfree(chan_name); + return ret; + } + + dev_dbg(dev, "request mbox chan %s\n", chan_name); + /* chan_name is not used anymore by framework */ + kfree(chan_name); + } + + sc_ipc->dev = dev; + mutex_init(&sc_ipc->lock); + init_completion(&sc_ipc->done); + + imx_sc_ipc_handle = sc_ipc; + + ret = imx_scu_soc_init(dev); + if (ret) + dev_warn(dev, "failed to initialize SoC info: %d\n", ret); + + ret = imx_scu_enable_general_irq_channel(dev); + if (ret) + dev_warn(dev, + "failed to enable general irq channel: %d\n", ret); + + dev_info(dev, "NXP i.MX SCU Initialized\n"); + + return devm_of_platform_populate(dev); +} + +static const struct of_device_id imx_scu_match[] = { + { .compatible = "fsl,imx-scu", }, + { /* Sentinel */ } +}; + +static struct platform_driver imx_scu_driver = { + .driver = { + .name = "imx-scu", + .of_match_table = imx_scu_match, + }, + .probe = imx_scu_probe, +}; +builtin_platform_driver(imx_scu_driver); + +MODULE_AUTHOR("Dong Aisheng "); +MODULE_DESCRIPTION("IMX SCU firmware protocol driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3