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/rpmsg/qcom_glink_rpm.c | 351 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 351 insertions(+) create mode 100644 drivers/rpmsg/qcom_glink_rpm.c (limited to 'drivers/rpmsg/qcom_glink_rpm.c') diff --git a/drivers/rpmsg/qcom_glink_rpm.c b/drivers/rpmsg/qcom_glink_rpm.c new file mode 100644 index 000000000..f64f45d1a --- /dev/null +++ b/drivers/rpmsg/qcom_glink_rpm.c @@ -0,0 +1,351 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2016-2017, Linaro Ltd + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "rpmsg_internal.h" +#include "qcom_glink_native.h" + +#define RPM_TOC_SIZE 256 +#define RPM_TOC_MAGIC 0x67727430 /* grt0 */ +#define RPM_TOC_MAX_ENTRIES ((RPM_TOC_SIZE - sizeof(struct rpm_toc)) / \ + sizeof(struct rpm_toc_entry)) + +#define RPM_TX_FIFO_ID 0x61703272 /* ap2r */ +#define RPM_RX_FIFO_ID 0x72326170 /* r2ap */ + +#define to_rpm_pipe(p) container_of(p, struct glink_rpm_pipe, native) + +struct rpm_toc_entry { + __le32 id; + __le32 offset; + __le32 size; +} __packed; + +struct rpm_toc { + __le32 magic; + __le32 count; + + struct rpm_toc_entry entries[]; +} __packed; + +struct glink_rpm_pipe { + struct qcom_glink_pipe native; + + void __iomem *tail; + void __iomem *head; + + void __iomem *fifo; +}; + +static size_t glink_rpm_rx_avail(struct qcom_glink_pipe *glink_pipe) +{ + struct glink_rpm_pipe *pipe = to_rpm_pipe(glink_pipe); + unsigned int head; + unsigned int tail; + + head = readl(pipe->head); + tail = readl(pipe->tail); + + if (head < tail) + return pipe->native.length - tail + head; + else + return head - tail; +} + +static void glink_rpm_rx_peak(struct qcom_glink_pipe *glink_pipe, + void *data, unsigned int offset, size_t count) +{ + struct glink_rpm_pipe *pipe = to_rpm_pipe(glink_pipe); + unsigned int tail; + size_t len; + + tail = readl(pipe->tail); + tail += offset; + if (tail >= pipe->native.length) + tail -= pipe->native.length; + + len = min_t(size_t, count, pipe->native.length - tail); + if (len) { + __ioread32_copy(data, pipe->fifo + tail, + len / sizeof(u32)); + } + + if (len != count) { + __ioread32_copy(data + len, pipe->fifo, + (count - len) / sizeof(u32)); + } +} + +static void glink_rpm_rx_advance(struct qcom_glink_pipe *glink_pipe, + size_t count) +{ + struct glink_rpm_pipe *pipe = to_rpm_pipe(glink_pipe); + unsigned int tail; + + tail = readl(pipe->tail); + + tail += count; + if (tail >= pipe->native.length) + tail -= pipe->native.length; + + writel(tail, pipe->tail); +} + +static size_t glink_rpm_tx_avail(struct qcom_glink_pipe *glink_pipe) +{ + struct glink_rpm_pipe *pipe = to_rpm_pipe(glink_pipe); + unsigned int head; + unsigned int tail; + + head = readl(pipe->head); + tail = readl(pipe->tail); + + if (tail <= head) + return pipe->native.length - head + tail; + else + return tail - head; +} + +static unsigned int glink_rpm_tx_write_one(struct glink_rpm_pipe *pipe, + unsigned int head, + const void *data, size_t count) +{ + size_t len; + + len = min_t(size_t, count, pipe->native.length - head); + if (len) { + __iowrite32_copy(pipe->fifo + head, data, + len / sizeof(u32)); + } + + if (len != count) { + __iowrite32_copy(pipe->fifo, data + len, + (count - len) / sizeof(u32)); + } + + head += count; + if (head >= pipe->native.length) + head -= pipe->native.length; + + return head; +} + +static void glink_rpm_tx_write(struct qcom_glink_pipe *glink_pipe, + const void *hdr, size_t hlen, + const void *data, size_t dlen) +{ + struct glink_rpm_pipe *pipe = to_rpm_pipe(glink_pipe); + size_t tlen = hlen + dlen; + size_t aligned_dlen; + unsigned int head; + char padding[8] = {0}; + size_t pad; + + /* Header length comes from glink native and is always 4 byte aligned */ + if (WARN(hlen % 4, "Glink Header length must be 4 bytes aligned\n")) + return; + + /* + * Move the unaligned tail of the message to the padding chunk, to + * ensure word aligned accesses + */ + aligned_dlen = ALIGN_DOWN(dlen, 4); + if (aligned_dlen != dlen) + memcpy(padding, data + aligned_dlen, dlen - aligned_dlen); + + head = readl(pipe->head); + head = glink_rpm_tx_write_one(pipe, head, hdr, hlen); + head = glink_rpm_tx_write_one(pipe, head, data, aligned_dlen); + + pad = ALIGN(tlen, 8) - ALIGN_DOWN(tlen, 4); + if (pad) + head = glink_rpm_tx_write_one(pipe, head, padding, pad); + writel(head, pipe->head); +} + +static int glink_rpm_parse_toc(struct device *dev, + void __iomem *msg_ram, + size_t msg_ram_size, + struct glink_rpm_pipe *rx, + struct glink_rpm_pipe *tx) +{ + struct rpm_toc *toc; + int num_entries; + unsigned int id; + size_t offset; + size_t size; + void *buf; + int i; + + buf = kzalloc(RPM_TOC_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + __ioread32_copy(buf, msg_ram + msg_ram_size - RPM_TOC_SIZE, + RPM_TOC_SIZE / sizeof(u32)); + + toc = buf; + + if (le32_to_cpu(toc->magic) != RPM_TOC_MAGIC) { + dev_err(dev, "RPM TOC has invalid magic\n"); + goto err_inval; + } + + num_entries = le32_to_cpu(toc->count); + if (num_entries > RPM_TOC_MAX_ENTRIES) { + dev_err(dev, "Invalid number of toc entries\n"); + goto err_inval; + } + + for (i = 0; i < num_entries; i++) { + id = le32_to_cpu(toc->entries[i].id); + offset = le32_to_cpu(toc->entries[i].offset); + size = le32_to_cpu(toc->entries[i].size); + + if (offset > msg_ram_size || offset + size > msg_ram_size) { + dev_err(dev, "TOC entry with invalid size\n"); + continue; + } + + switch (id) { + case RPM_RX_FIFO_ID: + rx->native.length = size; + + rx->tail = msg_ram + offset; + rx->head = msg_ram + offset + sizeof(u32); + rx->fifo = msg_ram + offset + 2 * sizeof(u32); + break; + case RPM_TX_FIFO_ID: + tx->native.length = size; + + tx->tail = msg_ram + offset; + tx->head = msg_ram + offset + sizeof(u32); + tx->fifo = msg_ram + offset + 2 * sizeof(u32); + break; + } + } + + if (!rx->fifo || !tx->fifo) { + dev_err(dev, "Unable to find rx and tx descriptors\n"); + goto err_inval; + } + + kfree(buf); + return 0; + +err_inval: + kfree(buf); + return -EINVAL; +} + +static int glink_rpm_probe(struct platform_device *pdev) +{ + struct qcom_glink *glink; + struct glink_rpm_pipe *rx_pipe; + struct glink_rpm_pipe *tx_pipe; + struct device_node *np; + void __iomem *msg_ram; + size_t msg_ram_size; + struct device *dev = &pdev->dev; + struct resource r; + int ret; + + rx_pipe = devm_kzalloc(&pdev->dev, sizeof(*rx_pipe), GFP_KERNEL); + tx_pipe = devm_kzalloc(&pdev->dev, sizeof(*tx_pipe), GFP_KERNEL); + if (!rx_pipe || !tx_pipe) + return -ENOMEM; + + np = of_parse_phandle(dev->of_node, "qcom,rpm-msg-ram", 0); + ret = of_address_to_resource(np, 0, &r); + of_node_put(np); + if (ret) + return ret; + + msg_ram = devm_ioremap(dev, r.start, resource_size(&r)); + msg_ram_size = resource_size(&r); + if (!msg_ram) + return -ENOMEM; + + ret = glink_rpm_parse_toc(dev, msg_ram, msg_ram_size, + rx_pipe, tx_pipe); + if (ret) + return ret; + + /* Pipe specific accessors */ + rx_pipe->native.avail = glink_rpm_rx_avail; + rx_pipe->native.peak = glink_rpm_rx_peak; + rx_pipe->native.advance = glink_rpm_rx_advance; + tx_pipe->native.avail = glink_rpm_tx_avail; + tx_pipe->native.write = glink_rpm_tx_write; + + writel(0, tx_pipe->head); + writel(0, rx_pipe->tail); + + glink = qcom_glink_native_probe(&pdev->dev, + 0, + &rx_pipe->native, + &tx_pipe->native, + true); + if (IS_ERR(glink)) + return PTR_ERR(glink); + + platform_set_drvdata(pdev, glink); + + return 0; +} + +static int glink_rpm_remove(struct platform_device *pdev) +{ + struct qcom_glink *glink = platform_get_drvdata(pdev); + + qcom_glink_native_remove(glink); + + return 0; +} + +static const struct of_device_id glink_rpm_of_match[] = { + { .compatible = "qcom,glink-rpm" }, + {} +}; +MODULE_DEVICE_TABLE(of, glink_rpm_of_match); + +static struct platform_driver glink_rpm_driver = { + .probe = glink_rpm_probe, + .remove = glink_rpm_remove, + .driver = { + .name = "qcom_glink_rpm", + .of_match_table = glink_rpm_of_match, + }, +}; + +static int __init glink_rpm_init(void) +{ + return platform_driver_register(&glink_rpm_driver); +} +subsys_initcall(glink_rpm_init); + +static void __exit glink_rpm_exit(void) +{ + platform_driver_unregister(&glink_rpm_driver); +} +module_exit(glink_rpm_exit); + +MODULE_AUTHOR("Bjorn Andersson "); +MODULE_DESCRIPTION("Qualcomm GLINK RPM driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3