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/bus.c | 404 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 404 insertions(+) create mode 100644 drivers/mmc/core/bus.c (limited to 'drivers/mmc/core/bus.c') diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c new file mode 100644 index 000000000..36679f4e9 --- /dev/null +++ b/drivers/mmc/core/bus.c @@ -0,0 +1,404 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/mmc/core/bus.c + * + * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright (C) 2007 Pierre Ossman + * + * MMC card bus driver model + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "core.h" +#include "card.h" +#include "host.h" +#include "sdio_cis.h" +#include "bus.h" + +#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv) + +static ssize_t type_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct mmc_card *card = mmc_dev_to_card(dev); + + switch (card->type) { + case MMC_TYPE_MMC: + return sysfs_emit(buf, "MMC\n"); + case MMC_TYPE_SD: + return sysfs_emit(buf, "SD\n"); + case MMC_TYPE_SDIO: + return sysfs_emit(buf, "SDIO\n"); + case MMC_TYPE_SD_COMBO: + return sysfs_emit(buf, "SDcombo\n"); + default: + return -EFAULT; + } +} +static DEVICE_ATTR_RO(type); + +static struct attribute *mmc_dev_attrs[] = { + &dev_attr_type.attr, + NULL, +}; +ATTRIBUTE_GROUPS(mmc_dev); + +static int +mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct mmc_card *card = mmc_dev_to_card(dev); + const char *type; + unsigned int i; + int retval = 0; + + switch (card->type) { + case MMC_TYPE_MMC: + type = "MMC"; + break; + case MMC_TYPE_SD: + type = "SD"; + break; + case MMC_TYPE_SDIO: + type = "SDIO"; + break; + case MMC_TYPE_SD_COMBO: + type = "SDcombo"; + break; + default: + type = NULL; + } + + if (type) { + retval = add_uevent_var(env, "MMC_TYPE=%s", type); + if (retval) + return retval; + } + + if (mmc_card_sdio(card) || mmc_card_sd_combo(card)) { + retval = add_uevent_var(env, "SDIO_ID=%04X:%04X", + card->cis.vendor, card->cis.device); + if (retval) + return retval; + + retval = add_uevent_var(env, "SDIO_REVISION=%u.%u", + card->major_rev, card->minor_rev); + if (retval) + return retval; + + for (i = 0; i < card->num_info; i++) { + retval = add_uevent_var(env, "SDIO_INFO%u=%s", i+1, card->info[i]); + if (retval) + return retval; + } + } + + /* + * SDIO (non-combo) cards are not handled by mmc_block driver and do not + * have accessible CID register which used by mmc_card_name() function. + */ + if (mmc_card_sdio(card)) + return 0; + + retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card)); + if (retval) + return retval; + + /* + * Request the mmc_block device. Note: that this is a direct request + * for the module it carries no information as to what is inserted. + */ + retval = add_uevent_var(env, "MODALIAS=mmc:block"); + + return retval; +} + +static int mmc_bus_probe(struct device *dev) +{ + struct mmc_driver *drv = to_mmc_driver(dev->driver); + struct mmc_card *card = mmc_dev_to_card(dev); + + return drv->probe(card); +} + +static void mmc_bus_remove(struct device *dev) +{ + struct mmc_driver *drv = to_mmc_driver(dev->driver); + struct mmc_card *card = mmc_dev_to_card(dev); + + drv->remove(card); +} + +static void mmc_bus_shutdown(struct device *dev) +{ + struct mmc_driver *drv = to_mmc_driver(dev->driver); + struct mmc_card *card = mmc_dev_to_card(dev); + struct mmc_host *host = card->host; + int ret; + + if (dev->driver && drv->shutdown) + drv->shutdown(card); + + if (host->bus_ops->shutdown) { + ret = host->bus_ops->shutdown(host); + if (ret) + pr_warn("%s: error %d during shutdown\n", + mmc_hostname(host), ret); + } +} + +#ifdef CONFIG_PM_SLEEP +static int mmc_bus_suspend(struct device *dev) +{ + struct mmc_card *card = mmc_dev_to_card(dev); + struct mmc_host *host = card->host; + int ret; + + ret = pm_generic_suspend(dev); + if (ret) + return ret; + + ret = host->bus_ops->suspend(host); + if (ret) + pm_generic_resume(dev); + + return ret; +} + +static int mmc_bus_resume(struct device *dev) +{ + struct mmc_card *card = mmc_dev_to_card(dev); + struct mmc_host *host = card->host; + int ret; + + ret = host->bus_ops->resume(host); + if (ret) + pr_warn("%s: error %d during resume (card was removed?)\n", + mmc_hostname(host), ret); + + ret = pm_generic_resume(dev); + return ret; +} +#endif + +#ifdef CONFIG_PM +static int mmc_runtime_suspend(struct device *dev) +{ + struct mmc_card *card = mmc_dev_to_card(dev); + struct mmc_host *host = card->host; + + return host->bus_ops->runtime_suspend(host); +} + +static int mmc_runtime_resume(struct device *dev) +{ + struct mmc_card *card = mmc_dev_to_card(dev); + struct mmc_host *host = card->host; + + return host->bus_ops->runtime_resume(host); +} +#endif /* !CONFIG_PM */ + +static const struct dev_pm_ops mmc_bus_pm_ops = { + SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume) +}; + +static struct bus_type mmc_bus_type = { + .name = "mmc", + .dev_groups = mmc_dev_groups, + .uevent = mmc_bus_uevent, + .probe = mmc_bus_probe, + .remove = mmc_bus_remove, + .shutdown = mmc_bus_shutdown, + .pm = &mmc_bus_pm_ops, +}; + +int mmc_register_bus(void) +{ + return bus_register(&mmc_bus_type); +} + +void mmc_unregister_bus(void) +{ + bus_unregister(&mmc_bus_type); +} + +/** + * mmc_register_driver - register a media driver + * @drv: MMC media driver + */ +int mmc_register_driver(struct mmc_driver *drv) +{ + drv->drv.bus = &mmc_bus_type; + return driver_register(&drv->drv); +} + +EXPORT_SYMBOL(mmc_register_driver); + +/** + * mmc_unregister_driver - unregister a media driver + * @drv: MMC media driver + */ +void mmc_unregister_driver(struct mmc_driver *drv) +{ + drv->drv.bus = &mmc_bus_type; + driver_unregister(&drv->drv); +} + +EXPORT_SYMBOL(mmc_unregister_driver); + +static void mmc_release_card(struct device *dev) +{ + struct mmc_card *card = mmc_dev_to_card(dev); + + sdio_free_common_cis(card); + + kfree(card->info); + + kfree(card); +} + +/* + * Allocate and initialise a new MMC card structure. + */ +struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type) +{ + struct mmc_card *card; + + card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL); + if (!card) + return ERR_PTR(-ENOMEM); + + card->host = host; + + device_initialize(&card->dev); + + card->dev.parent = mmc_classdev(host); + card->dev.bus = &mmc_bus_type; + card->dev.release = mmc_release_card; + card->dev.type = type; + + return card; +} + +/* + * Register a new MMC card with the driver model. + */ +int mmc_add_card(struct mmc_card *card) +{ + int ret; + const char *type; + const char *uhs_bus_speed_mode = ""; + static const char *const uhs_speeds[] = { + [UHS_SDR12_BUS_SPEED] = "SDR12 ", + [UHS_SDR25_BUS_SPEED] = "SDR25 ", + [UHS_SDR50_BUS_SPEED] = "SDR50 ", + [UHS_SDR104_BUS_SPEED] = "SDR104 ", + [UHS_DDR50_BUS_SPEED] = "DDR50 ", + }; + + + dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca); + + switch (card->type) { + case MMC_TYPE_MMC: + type = "MMC"; + break; + case MMC_TYPE_SD: + type = "SD"; + if (mmc_card_blockaddr(card)) { + if (mmc_card_ext_capacity(card)) + type = "SDXC"; + else + type = "SDHC"; + } + break; + case MMC_TYPE_SDIO: + type = "SDIO"; + break; + case MMC_TYPE_SD_COMBO: + type = "SD-combo"; + if (mmc_card_blockaddr(card)) + type = "SDHC-combo"; + break; + default: + type = "?"; + break; + } + + if (mmc_card_uhs(card) && + (card->sd_bus_speed < ARRAY_SIZE(uhs_speeds))) + uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed]; + + if (mmc_host_is_spi(card->host)) { + pr_info("%s: new %s%s%s card on SPI\n", + mmc_hostname(card->host), + mmc_card_hs(card) ? "high speed " : "", + mmc_card_ddr52(card) ? "DDR " : "", + type); + } else { + pr_info("%s: new %s%s%s%s%s%s card at address %04x\n", + mmc_hostname(card->host), + mmc_card_uhs(card) ? "ultra high speed " : + (mmc_card_hs(card) ? "high speed " : ""), + mmc_card_hs400(card) ? "HS400 " : + (mmc_card_hs200(card) ? "HS200 " : ""), + mmc_card_hs400es(card) ? "Enhanced strobe " : "", + mmc_card_ddr52(card) ? "DDR " : "", + uhs_bus_speed_mode, type, card->rca); + } + + mmc_add_card_debugfs(card); + card->dev.of_node = mmc_of_find_child_device(card->host, 0); + + device_enable_async_suspend(&card->dev); + + ret = device_add(&card->dev); + if (ret) + return ret; + + mmc_card_set_present(card); + + return 0; +} + +/* + * Unregister a new MMC card with the driver model, and + * (eventually) free it. + */ +void mmc_remove_card(struct mmc_card *card) +{ + struct mmc_host *host = card->host; + + mmc_remove_card_debugfs(card); + + if (mmc_card_present(card)) { + if (mmc_host_is_spi(card->host)) { + pr_info("%s: SPI card removed\n", + mmc_hostname(card->host)); + } else { + pr_info("%s: card %04x removed\n", + mmc_hostname(card->host), card->rca); + } + device_del(&card->dev); + of_node_put(card->dev.of_node); + } + + if (host->cqe_enabled) { + host->cqe_ops->cqe_disable(host); + host->cqe_enabled = false; + } + + put_device(&card->dev); +} -- cgit v1.2.3