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/mmc/core/sdio_bus.c | 398 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 398 insertions(+) create mode 100644 drivers/mmc/core/sdio_bus.c (limited to 'drivers/mmc/core/sdio_bus.c') diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c new file mode 100644 index 000000000..f191a2a76 --- /dev/null +++ b/drivers/mmc/core/sdio_bus.c @@ -0,0 +1,398 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * linux/drivers/mmc/core/sdio_bus.c + * + * Copyright 2007 Pierre Ossman + * + * SDIO function driver model + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include "core.h" +#include "card.h" +#include "sdio_cis.h" +#include "sdio_bus.h" + +#define to_sdio_driver(d) container_of(d, struct sdio_driver, drv) + +/* show configuration fields */ +#define sdio_config_attr(field, format_string, args...) \ +static ssize_t \ +field##_show(struct device *dev, struct device_attribute *attr, char *buf) \ +{ \ + struct sdio_func *func; \ + \ + func = dev_to_sdio_func (dev); \ + return sysfs_emit(buf, format_string, args); \ +} \ +static DEVICE_ATTR_RO(field) + +sdio_config_attr(class, "0x%02x\n", func->class); +sdio_config_attr(vendor, "0x%04x\n", func->vendor); +sdio_config_attr(device, "0x%04x\n", func->device); +sdio_config_attr(revision, "%u.%u\n", func->major_rev, func->minor_rev); +sdio_config_attr(modalias, "sdio:c%02Xv%04Xd%04X\n", func->class, func->vendor, func->device); + +#define sdio_info_attr(num) \ +static ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf) \ +{ \ + struct sdio_func *func = dev_to_sdio_func(dev); \ + \ + if (num > func->num_info) \ + return -ENODATA; \ + if (!func->info[num - 1][0]) \ + return 0; \ + return sysfs_emit(buf, "%s\n", func->info[num - 1]); \ +} \ +static DEVICE_ATTR_RO(info##num) + +sdio_info_attr(1); +sdio_info_attr(2); +sdio_info_attr(3); +sdio_info_attr(4); + +static struct attribute *sdio_dev_attrs[] = { + &dev_attr_class.attr, + &dev_attr_vendor.attr, + &dev_attr_device.attr, + &dev_attr_revision.attr, + &dev_attr_info1.attr, + &dev_attr_info2.attr, + &dev_attr_info3.attr, + &dev_attr_info4.attr, + &dev_attr_modalias.attr, + NULL, +}; +ATTRIBUTE_GROUPS(sdio_dev); + +static const struct sdio_device_id *sdio_match_one(struct sdio_func *func, + const struct sdio_device_id *id) +{ + if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class) + return NULL; + if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor) + return NULL; + if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device) + return NULL; + return id; +} + +static const struct sdio_device_id *sdio_match_device(struct sdio_func *func, + struct sdio_driver *sdrv) +{ + const struct sdio_device_id *ids; + + ids = sdrv->id_table; + + if (ids) { + while (ids->class || ids->vendor || ids->device) { + if (sdio_match_one(func, ids)) + return ids; + ids++; + } + } + + return NULL; +} + +static int sdio_bus_match(struct device *dev, struct device_driver *drv) +{ + struct sdio_func *func = dev_to_sdio_func(dev); + struct sdio_driver *sdrv = to_sdio_driver(drv); + + if (sdio_match_device(func, sdrv)) + return 1; + + return 0; +} + +static int +sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct sdio_func *func = dev_to_sdio_func(dev); + unsigned int i; + + if (add_uevent_var(env, + "SDIO_CLASS=%02X", func->class)) + return -ENOMEM; + + if (add_uevent_var(env, + "SDIO_ID=%04X:%04X", func->vendor, func->device)) + return -ENOMEM; + + if (add_uevent_var(env, + "SDIO_REVISION=%u.%u", func->major_rev, func->minor_rev)) + return -ENOMEM; + + for (i = 0; i < func->num_info; i++) { + if (add_uevent_var(env, "SDIO_INFO%u=%s", i+1, func->info[i])) + return -ENOMEM; + } + + if (add_uevent_var(env, + "MODALIAS=sdio:c%02Xv%04Xd%04X", + func->class, func->vendor, func->device)) + return -ENOMEM; + + return 0; +} + +static int sdio_bus_probe(struct device *dev) +{ + struct sdio_driver *drv = to_sdio_driver(dev->driver); + struct sdio_func *func = dev_to_sdio_func(dev); + const struct sdio_device_id *id; + int ret; + + id = sdio_match_device(func, drv); + if (!id) + return -ENODEV; + + ret = dev_pm_domain_attach(dev, false); + if (ret) + return ret; + + atomic_inc(&func->card->sdio_funcs_probed); + + /* Unbound SDIO functions are always suspended. + * During probe, the function is set active and the usage count + * is incremented. If the driver supports runtime PM, + * it should call pm_runtime_put_noidle() in its probe routine and + * pm_runtime_get_noresume() in its remove routine. + */ + if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) { + ret = pm_runtime_get_sync(dev); + if (ret < 0) + goto disable_runtimepm; + } + + /* Set the default block size so the driver is sure it's something + * sensible. */ + sdio_claim_host(func); + if (mmc_card_removed(func->card)) + ret = -ENOMEDIUM; + else + ret = sdio_set_block_size(func, 0); + sdio_release_host(func); + if (ret) + goto disable_runtimepm; + + ret = drv->probe(func, id); + if (ret) + goto disable_runtimepm; + + return 0; + +disable_runtimepm: + atomic_dec(&func->card->sdio_funcs_probed); + if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) + pm_runtime_put_noidle(dev); + dev_pm_domain_detach(dev, false); + return ret; +} + +static void sdio_bus_remove(struct device *dev) +{ + struct sdio_driver *drv = to_sdio_driver(dev->driver); + struct sdio_func *func = dev_to_sdio_func(dev); + + /* Make sure card is powered before invoking ->remove() */ + if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) + pm_runtime_get_sync(dev); + + drv->remove(func); + atomic_dec(&func->card->sdio_funcs_probed); + + if (func->irq_handler) { + pr_warn("WARNING: driver %s did not remove its interrupt handler!\n", + drv->name); + sdio_claim_host(func); + sdio_release_irq(func); + sdio_release_host(func); + } + + /* First, undo the increment made directly above */ + if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) + pm_runtime_put_noidle(dev); + + /* Then undo the runtime PM settings in sdio_bus_probe() */ + if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) + pm_runtime_put_sync(dev); + + dev_pm_domain_detach(dev, false); +} + +static const struct dev_pm_ops sdio_bus_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_generic_suspend, pm_generic_resume) + SET_RUNTIME_PM_OPS( + pm_generic_runtime_suspend, + pm_generic_runtime_resume, + NULL + ) +}; + +static struct bus_type sdio_bus_type = { + .name = "sdio", + .dev_groups = sdio_dev_groups, + .match = sdio_bus_match, + .uevent = sdio_bus_uevent, + .probe = sdio_bus_probe, + .remove = sdio_bus_remove, + .pm = &sdio_bus_pm_ops, +}; + +int sdio_register_bus(void) +{ + return bus_register(&sdio_bus_type); +} + +void sdio_unregister_bus(void) +{ + bus_unregister(&sdio_bus_type); +} + +/** + * sdio_register_driver - register a function driver + * @drv: SDIO function driver + */ +int sdio_register_driver(struct sdio_driver *drv) +{ + drv->drv.name = drv->name; + drv->drv.bus = &sdio_bus_type; + return driver_register(&drv->drv); +} +EXPORT_SYMBOL_GPL(sdio_register_driver); + +/** + * sdio_unregister_driver - unregister a function driver + * @drv: SDIO function driver + */ +void sdio_unregister_driver(struct sdio_driver *drv) +{ + drv->drv.bus = &sdio_bus_type; + driver_unregister(&drv->drv); +} +EXPORT_SYMBOL_GPL(sdio_unregister_driver); + +static void sdio_release_func(struct device *dev) +{ + struct sdio_func *func = dev_to_sdio_func(dev); + + if (!(func->card->quirks & MMC_QUIRK_NONSTD_SDIO)) + sdio_free_func_cis(func); + + /* + * We have now removed the link to the tuples in the + * card structure, so remove the reference. + */ + put_device(&func->card->dev); + + kfree(func->info); + kfree(func->tmpbuf); + kfree(func); +} + +/* + * Allocate and initialise a new SDIO function structure. + */ +struct sdio_func *sdio_alloc_func(struct mmc_card *card) +{ + struct sdio_func *func; + + func = kzalloc(sizeof(struct sdio_func), GFP_KERNEL); + if (!func) + return ERR_PTR(-ENOMEM); + + /* + * allocate buffer separately to make sure it's properly aligned for + * DMA usage (incl. 64 bit DMA) + */ + func->tmpbuf = kmalloc(4, GFP_KERNEL); + if (!func->tmpbuf) { + kfree(func); + return ERR_PTR(-ENOMEM); + } + + func->card = card; + + device_initialize(&func->dev); + + /* + * We may link to tuples in the card structure, + * we need make sure we have a reference to it. + */ + get_device(&func->card->dev); + + func->dev.parent = &card->dev; + func->dev.bus = &sdio_bus_type; + func->dev.release = sdio_release_func; + + return func; +} + +#ifdef CONFIG_ACPI +static void sdio_acpi_set_handle(struct sdio_func *func) +{ + struct mmc_host *host = func->card->host; + u64 addr = ((u64)host->slotno << 16) | func->num; + + acpi_preset_companion(&func->dev, ACPI_COMPANION(host->parent), addr); +} +#else +static inline void sdio_acpi_set_handle(struct sdio_func *func) {} +#endif + +static void sdio_set_of_node(struct sdio_func *func) +{ + struct mmc_host *host = func->card->host; + + func->dev.of_node = mmc_of_find_child_device(host, func->num); +} + +/* + * Register a new SDIO function with the driver model. + */ +int sdio_add_func(struct sdio_func *func) +{ + int ret; + + dev_set_name(&func->dev, "%s:%d", mmc_card_id(func->card), func->num); + + sdio_set_of_node(func); + sdio_acpi_set_handle(func); + device_enable_async_suspend(&func->dev); + ret = device_add(&func->dev); + if (ret == 0) + sdio_func_set_present(func); + + return ret; +} + +/* + * Unregister a SDIO function with the driver model, and + * (eventually) free it. + * This function can be called through error paths where sdio_add_func() was + * never executed (because a failure occurred at an earlier point). + */ +void sdio_remove_func(struct sdio_func *func) +{ + if (sdio_func_present(func)) + device_del(&func->dev); + + of_node_put(func->dev.of_node); + put_device(&func->dev); +} + -- cgit v1.2.3