Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

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().
  ...

1 files changed, 673 insertions, 0 deletions

diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
new file mode 100644
index 000000000..d17eda753
--- /dev/null
+++ b/drivers/mmc/core/host.c
@@ -0,0 +1,673 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  linux/drivers/mmc/core/host.c
+ *
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *  Copyright (C) 2007-2008 Pierre Ossman
+ *  Copyright (C) 2010 Linus Walleij
+ *
+ *  MMC host class device management
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/idr.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/pagemap.h>
+#include <linux/pm_wakeup.h>
+#include <linux/export.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/slot-gpio.h>
+
+#include "core.h"
+#include "crypto.h"
+#include "host.h"
+#include "slot-gpio.h"
+#include "pwrseq.h"
+#include "sdio_ops.h"
+
+#define cls_dev_to_mmc_host(d)	container_of(d, struct mmc_host, class_dev)
+
+static DEFINE_IDA(mmc_host_ida);
+
+#ifdef CONFIG_PM_SLEEP
+static int mmc_host_class_prepare(struct device *dev)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+
+	/*
+	 * It's safe to access the bus_ops pointer, as both userspace and the
+	 * workqueue for detecting cards are frozen at this point.
+	 */
+	if (!host->bus_ops)
+		return 0;
+
+	/* Validate conditions for system suspend. */
+	if (host->bus_ops->pre_suspend)
+		return host->bus_ops->pre_suspend(host);
+
+	return 0;
+}
+
+static void mmc_host_class_complete(struct device *dev)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+
+	_mmc_detect_change(host, 0, false);
+}
+
+static const struct dev_pm_ops mmc_host_class_dev_pm_ops = {
+	.prepare = mmc_host_class_prepare,
+	.complete = mmc_host_class_complete,
+};
+
+#define MMC_HOST_CLASS_DEV_PM_OPS (&mmc_host_class_dev_pm_ops)
+#else
+#define MMC_HOST_CLASS_DEV_PM_OPS NULL
+#endif
+
+static void mmc_host_classdev_release(struct device *dev)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+	wakeup_source_unregister(host->ws);
+	if (of_alias_get_id(host->parent->of_node, "mmc") < 0)
+		ida_simple_remove(&mmc_host_ida, host->index);
+	kfree(host);
+}
+
+static int mmc_host_classdev_shutdown(struct device *dev)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+
+	__mmc_stop_host(host);
+	return 0;
+}
+
+static struct class mmc_host_class = {
+	.name		= "mmc_host",
+	.dev_release	= mmc_host_classdev_release,
+	.shutdown_pre	= mmc_host_classdev_shutdown,
+	.pm		= MMC_HOST_CLASS_DEV_PM_OPS,
+};
+
+int mmc_register_host_class(void)
+{
+	return class_register(&mmc_host_class);
+}
+
+void mmc_unregister_host_class(void)
+{
+	class_unregister(&mmc_host_class);
+}
+
+/**
+ * mmc_retune_enable() - enter a transfer mode that requires retuning
+ * @host: host which should retune now
+ */
+void mmc_retune_enable(struct mmc_host *host)
+{
+	host->can_retune = 1;
+	if (host->retune_period)
+		mod_timer(&host->retune_timer,
+			  jiffies + host->retune_period * HZ);
+}
+
+/*
+ * Pause re-tuning for a small set of operations.  The pause begins after the
+ * next command and after first doing re-tuning.
+ */
+void mmc_retune_pause(struct mmc_host *host)
+{
+	if (!host->retune_paused) {
+		host->retune_paused = 1;
+		mmc_retune_needed(host);
+		mmc_retune_hold(host);
+	}
+}
+EXPORT_SYMBOL(mmc_retune_pause);
+
+void mmc_retune_unpause(struct mmc_host *host)
+{
+	if (host->retune_paused) {
+		host->retune_paused = 0;
+		mmc_retune_release(host);
+	}
+}
+EXPORT_SYMBOL(mmc_retune_unpause);
+
+/**
+ * mmc_retune_disable() - exit a transfer mode that requires retuning
+ * @host: host which should not retune anymore
+ *
+ * It is not meant for temporarily preventing retuning!
+ */
+void mmc_retune_disable(struct mmc_host *host)
+{
+	mmc_retune_unpause(host);
+	host->can_retune = 0;
+	del_timer_sync(&host->retune_timer);
+	mmc_retune_clear(host);
+}
+
+void mmc_retune_timer_stop(struct mmc_host *host)
+{
+	del_timer_sync(&host->retune_timer);
+}
+EXPORT_SYMBOL(mmc_retune_timer_stop);
+
+void mmc_retune_hold(struct mmc_host *host)
+{
+	if (!host->hold_retune)
+		host->retune_now = 1;
+	host->hold_retune += 1;
+}
+
+void mmc_retune_release(struct mmc_host *host)
+{
+	if (host->hold_retune)
+		host->hold_retune -= 1;
+	else
+		WARN_ON(1);
+}
+EXPORT_SYMBOL(mmc_retune_release);
+
+int mmc_retune(struct mmc_host *host)
+{
+	bool return_to_hs400 = false;
+	int err;
+
+	if (host->retune_now)
+		host->retune_now = 0;
+	else
+		return 0;
+
+	if (!host->need_retune || host->doing_retune || !host->card)
+		return 0;
+
+	host->need_retune = 0;
+
+	host->doing_retune = 1;
+
+	if (host->ios.timing == MMC_TIMING_MMC_HS400) {
+		err = mmc_hs400_to_hs200(host->card);
+		if (err)
+			goto out;
+
+		return_to_hs400 = true;
+	}
+
+	err = mmc_execute_tuning(host->card);
+	if (err)
+		goto out;
+
+	if (return_to_hs400)
+		err = mmc_hs200_to_hs400(host->card);
+out:
+	host->doing_retune = 0;
+
+	return err;
+}
+
+static void mmc_retune_timer(struct timer_list *t)
+{
+	struct mmc_host *host = from_timer(host, t, retune_timer);
+
+	mmc_retune_needed(host);
+}
+
+static void mmc_of_parse_timing_phase(struct device *dev, const char *prop,
+				      struct mmc_clk_phase *phase)
+{
+	int degrees[2] = {0};
+	int rc;
+
+	rc = device_property_read_u32_array(dev, prop, degrees, 2);
+	phase->valid = !rc;
+	if (phase->valid) {
+		phase->in_deg = degrees[0];
+		phase->out_deg = degrees[1];
+	}
+}
+
+void
+mmc_of_parse_clk_phase(struct mmc_host *host, struct mmc_clk_phase_map *map)
+{
+	struct device *dev = host->parent;
+
+	mmc_of_parse_timing_phase(dev, "clk-phase-legacy",
+				  &map->phase[MMC_TIMING_LEGACY]);
+	mmc_of_parse_timing_phase(dev, "clk-phase-mmc-hs",
+				  &map->phase[MMC_TIMING_MMC_HS]);
+	mmc_of_parse_timing_phase(dev, "clk-phase-sd-hs",
+				  &map->phase[MMC_TIMING_SD_HS]);
+	mmc_of_parse_timing_phase(dev, "clk-phase-uhs-sdr12",
+				  &map->phase[MMC_TIMING_UHS_SDR12]);
+	mmc_of_parse_timing_phase(dev, "clk-phase-uhs-sdr25",
+				  &map->phase[MMC_TIMING_UHS_SDR25]);
+	mmc_of_parse_timing_phase(dev, "clk-phase-uhs-sdr50",
+				  &map->phase[MMC_TIMING_UHS_SDR50]);
+	mmc_of_parse_timing_phase(dev, "clk-phase-uhs-sdr104",
+				  &map->phase[MMC_TIMING_UHS_SDR104]);
+	mmc_of_parse_timing_phase(dev, "clk-phase-uhs-ddr50",
+				  &map->phase[MMC_TIMING_UHS_DDR50]);
+	mmc_of_parse_timing_phase(dev, "clk-phase-mmc-ddr52",
+				  &map->phase[MMC_TIMING_MMC_DDR52]);
+	mmc_of_parse_timing_phase(dev, "clk-phase-mmc-hs200",
+				  &map->phase[MMC_TIMING_MMC_HS200]);
+	mmc_of_parse_timing_phase(dev, "clk-phase-mmc-hs400",
+				  &map->phase[MMC_TIMING_MMC_HS400]);
+}
+EXPORT_SYMBOL(mmc_of_parse_clk_phase);
+
+/**
+ * mmc_of_parse() - parse host's device properties
+ * @host: host whose properties should be parsed.
+ *
+ * To keep the rest of the MMC subsystem unaware of whether DT has been
+ * used to instantiate and configure this host instance or not, we
+ * parse the properties and set respective generic mmc-host flags and
+ * parameters.
+ */
+int mmc_of_parse(struct mmc_host *host)
+{
+	struct device *dev = host->parent;
+	u32 bus_width, drv_type, cd_debounce_delay_ms;
+	int ret;
+
+	if (!dev || !dev_fwnode(dev))
+		return 0;
+
+	/* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */
+	if (device_property_read_u32(dev, "bus-width", &bus_width) < 0) {
+		dev_dbg(host->parent,
+			"\"bus-width\" property is missing, assuming 1 bit.\n");
+		bus_width = 1;
+	}
+
+	switch (bus_width) {
+	case 8:
+		host->caps |= MMC_CAP_8_BIT_DATA;
+		fallthrough;	/* Hosts capable of 8-bit can also do 4 bits */
+	case 4:
+		host->caps |= MMC_CAP_4_BIT_DATA;
+		break;
+	case 1:
+		break;
+	default:
+		dev_err(host->parent,
+			"Invalid \"bus-width\" value %u!\n", bus_width);
+		return -EINVAL;
+	}
+
+	/* f_max is obtained from the optional "max-frequency" property */
+	device_property_read_u32(dev, "max-frequency", &host->f_max);
+
+	/*
+	 * Configure CD and WP pins. They are both by default active low to
+	 * match the SDHCI spec. If GPIOs are provided for CD and / or WP, the
+	 * mmc-gpio helpers are used to attach, configure and use them. If
+	 * polarity inversion is specified in DT, one of MMC_CAP2_CD_ACTIVE_HIGH
+	 * and MMC_CAP2_RO_ACTIVE_HIGH capability-2 flags is set. If the
+	 * "broken-cd" property is provided, the MMC_CAP_NEEDS_POLL capability
+	 * is set. If the "non-removable" property is found, the
+	 * MMC_CAP_NONREMOVABLE capability is set and no card-detection
+	 * configuration is performed.
+	 */
+
+	/* Parse Card Detection */
+
+	if (device_property_read_bool(dev, "non-removable")) {
+		host->caps |= MMC_CAP_NONREMOVABLE;
+	} else {
+		if (device_property_read_bool(dev, "cd-inverted"))
+			host->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
+
+		if (device_property_read_u32(dev, "cd-debounce-delay-ms",
+					     &cd_debounce_delay_ms))
+			cd_debounce_delay_ms = 200;
+
+		if (device_property_read_bool(dev, "broken-cd"))
+			host->caps |= MMC_CAP_NEEDS_POLL;
+
+		ret = mmc_gpiod_request_cd(host, "cd", 0, false,
+					   cd_debounce_delay_ms * 1000);
+		if (!ret)
+			dev_info(host->parent, "Got CD GPIO\n");
+		else if (ret != -ENOENT && ret != -ENOSYS)
+			return ret;
+	}
+
+	/* Parse Write Protection */
+
+	if (device_property_read_bool(dev, "wp-inverted"))
+		host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
+
+	ret = mmc_gpiod_request_ro(host, "wp", 0, 0);
+	if (!ret)
+		dev_info(host->parent, "Got WP GPIO\n");
+	else if (ret != -ENOENT && ret != -ENOSYS)
+		return ret;
+
+	if (device_property_read_bool(dev, "disable-wp"))
+		host->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;
+
+	if (device_property_read_bool(dev, "cap-sd-highspeed"))
+		host->caps |= MMC_CAP_SD_HIGHSPEED;
+	if (device_property_read_bool(dev, "cap-mmc-highspeed"))
+		host->caps |= MMC_CAP_MMC_HIGHSPEED;
+	if (device_property_read_bool(dev, "sd-uhs-sdr12"))
+		host->caps |= MMC_CAP_UHS_SDR12;
+	if (device_property_read_bool(dev, "sd-uhs-sdr25"))
+		host->caps |= MMC_CAP_UHS_SDR25;
+	if (device_property_read_bool(dev, "sd-uhs-sdr50"))
+		host->caps |= MMC_CAP_UHS_SDR50;
+	if (device_property_read_bool(dev, "sd-uhs-sdr104"))
+		host->caps |= MMC_CAP_UHS_SDR104;
+	if (device_property_read_bool(dev, "sd-uhs-ddr50"))
+		host->caps |= MMC_CAP_UHS_DDR50;
+	if (device_property_read_bool(dev, "cap-power-off-card"))
+		host->caps |= MMC_CAP_POWER_OFF_CARD;
+	if (device_property_read_bool(dev, "cap-mmc-hw-reset"))
+		host->caps |= MMC_CAP_HW_RESET;
+	if (device_property_read_bool(dev, "cap-sdio-irq"))
+		host->caps |= MMC_CAP_SDIO_IRQ;
+	if (device_property_read_bool(dev, "full-pwr-cycle"))
+		host->caps2 |= MMC_CAP2_FULL_PWR_CYCLE;
+	if (device_property_read_bool(dev, "full-pwr-cycle-in-suspend"))
+		host->caps2 |= MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND;
+	if (device_property_read_bool(dev, "keep-power-in-suspend"))
+		host->pm_caps |= MMC_PM_KEEP_POWER;
+	if (device_property_read_bool(dev, "wakeup-source") ||
+	    device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */
+		host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
+	if (device_property_read_bool(dev, "mmc-ddr-3_3v"))
+		host->caps |= MMC_CAP_3_3V_DDR;
+	if (device_property_read_bool(dev, "mmc-ddr-1_8v"))
+		host->caps |= MMC_CAP_1_8V_DDR;
+	if (device_property_read_bool(dev, "mmc-ddr-1_2v"))
+		host->caps |= MMC_CAP_1_2V_DDR;
+	if (device_property_read_bool(dev, "mmc-hs200-1_8v"))
+		host->caps2 |= MMC_CAP2_HS200_1_8V_SDR;
+	if (device_property_read_bool(dev, "mmc-hs200-1_2v"))
+		host->caps2 |= MMC_CAP2_HS200_1_2V_SDR;
+	if (device_property_read_bool(dev, "mmc-hs400-1_8v"))
+		host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR;
+	if (device_property_read_bool(dev, "mmc-hs400-1_2v"))
+		host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR;
+	if (device_property_read_bool(dev, "mmc-hs400-enhanced-strobe"))
+		host->caps2 |= MMC_CAP2_HS400_ES;
+	if (device_property_read_bool(dev, "no-sdio"))
+		host->caps2 |= MMC_CAP2_NO_SDIO;
+	if (device_property_read_bool(dev, "no-sd"))
+		host->caps2 |= MMC_CAP2_NO_SD;
+	if (device_property_read_bool(dev, "no-mmc"))
+		host->caps2 |= MMC_CAP2_NO_MMC;
+	if (device_property_read_bool(dev, "no-mmc-hs400"))
+		host->caps2 &= ~(MMC_CAP2_HS400_1_8V | MMC_CAP2_HS400_1_2V |
+				 MMC_CAP2_HS400_ES);
+
+	/* Must be after "non-removable" check */
+	if (device_property_read_u32(dev, "fixed-emmc-driver-type", &drv_type) == 0) {
+		if (host->caps & MMC_CAP_NONREMOVABLE)
+			host->fixed_drv_type = drv_type;
+		else
+			dev_err(host->parent,
+				"can't use fixed driver type, media is removable\n");
+	}
+
+	host->dsr_req = !device_property_read_u32(dev, "dsr", &host->dsr);
+	if (host->dsr_req && (host->dsr & ~0xffff)) {
+		dev_err(host->parent,
+			"device tree specified broken value for DSR: 0x%x, ignoring\n",
+			host->dsr);
+		host->dsr_req = 0;
+	}
+
+	device_property_read_u32(dev, "post-power-on-delay-ms",
+				 &host->ios.power_delay_ms);
+
+	return mmc_pwrseq_alloc(host);
+}
+
+EXPORT_SYMBOL(mmc_of_parse);
+
+/**
+ * mmc_of_parse_voltage - return mask of supported voltages
+ * @host: host whose properties should be parsed.
+ * @mask: mask of voltages available for MMC/SD/SDIO
+ *
+ * Parse the "voltage-ranges" property, returning zero if it is not
+ * found, negative errno if the voltage-range specification is invalid,
+ * or one if the voltage-range is specified and successfully parsed.
+ */
+int mmc_of_parse_voltage(struct mmc_host *host, u32 *mask)
+{
+	const char *prop = "voltage-ranges";
+	struct device *dev = host->parent;
+	u32 *voltage_ranges;
+	int num_ranges, i;
+	int ret;
+
+	if (!device_property_present(dev, prop)) {
+		dev_dbg(dev, "%s unspecified\n", prop);
+		return 0;
+	}
+
+	ret = device_property_count_u32(dev, prop);
+	if (ret < 0)
+		return ret;
+
+	num_ranges = ret / 2;
+	if (!num_ranges) {
+		dev_err(dev, "%s empty\n", prop);
+		return -EINVAL;
+	}
+
+	voltage_ranges = kcalloc(2 * num_ranges, sizeof(*voltage_ranges), GFP_KERNEL);
+	if (!voltage_ranges)
+		return -ENOMEM;
+
+	ret = device_property_read_u32_array(dev, prop, voltage_ranges, 2 * num_ranges);
+	if (ret) {
+		kfree(voltage_ranges);
+		return ret;
+	}
+
+	for (i = 0; i < num_ranges; i++) {
+		const int j = i * 2;
+		u32 ocr_mask;
+
+		ocr_mask = mmc_vddrange_to_ocrmask(voltage_ranges[j + 0],
+						   voltage_ranges[j + 1]);
+		if (!ocr_mask) {
+			dev_err(dev, "range #%d in %s is invalid\n", i, prop);
+			kfree(voltage_ranges);
+			return -EINVAL;
+		}
+		*mask |= ocr_mask;
+	}
+
+	kfree(voltage_ranges);
+
+	return 1;
+}
+EXPORT_SYMBOL(mmc_of_parse_voltage);
+
+/**
+ * mmc_first_nonreserved_index() - get the first index that is not reserved
+ */
+static int mmc_first_nonreserved_index(void)
+{
+	int max;
+
+	max = of_alias_get_highest_id("mmc");
+	if (max < 0)
+		return 0;
+
+	return max + 1;
+}
+
+/**
+ *	mmc_alloc_host - initialise the per-host structure.
+ *	@extra: sizeof private data structure
+ *	@dev: pointer to host device model structure
+ *
+ *	Initialise the per-host structure.
+ */
+struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
+{
+	int index;
+	struct mmc_host *host;
+	int alias_id, min_idx, max_idx;
+
+	host = kzalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
+	if (!host)
+		return NULL;
+
+	/* scanning will be enabled when we're ready */
+	host->rescan_disable = 1;
+
+	alias_id = of_alias_get_id(dev->of_node, "mmc");
+	if (alias_id >= 0) {
+		index = alias_id;
+	} else {
+		min_idx = mmc_first_nonreserved_index();
+		max_idx = 0;
+
+		index = ida_simple_get(&mmc_host_ida, min_idx, max_idx, GFP_KERNEL);
+		if (index < 0) {
+			kfree(host);
+			return NULL;
+		}
+	}
+
+	host->index = index;
+
+	dev_set_name(&host->class_dev, "mmc%d", host->index);
+	host->ws = wakeup_source_register(NULL, dev_name(&host->class_dev));
+
+	host->parent = dev;
+	host->class_dev.parent = dev;
+	host->class_dev.class = &mmc_host_class;
+	device_initialize(&host->class_dev);
+	device_enable_async_suspend(&host->class_dev);
+
+	if (mmc_gpio_alloc(host)) {
+		put_device(&host->class_dev);
+		return NULL;
+	}
+
+	spin_lock_init(&host->lock);
+	init_waitqueue_head(&host->wq);
+	INIT_DELAYED_WORK(&host->detect, mmc_rescan);
+	INIT_WORK(&host->sdio_irq_work, sdio_irq_work);
+	timer_setup(&host->retune_timer, mmc_retune_timer, 0);
+
+	/*
+	 * By default, hosts do not support SGIO or large requests.
+	 * They have to set these according to their abilities.
+	 */
+	host->max_segs = 1;
+	host->max_seg_size = PAGE_SIZE;
+
+	host->max_req_size = PAGE_SIZE;
+	host->max_blk_size = 512;
+	host->max_blk_count = PAGE_SIZE / 512;
+
+	host->fixed_drv_type = -EINVAL;
+	host->ios.power_delay_ms = 10;
+	host->ios.power_mode = MMC_POWER_UNDEFINED;
+
+	return host;
+}
+
+EXPORT_SYMBOL(mmc_alloc_host);
+
+static int mmc_validate_host_caps(struct mmc_host *host)
+{
+	struct device *dev = host->parent;
+	u32 caps = host->caps, caps2 = host->caps2;
+
+	if (caps & MMC_CAP_SDIO_IRQ && !host->ops->enable_sdio_irq) {
+		dev_warn(dev, "missing ->enable_sdio_irq() ops\n");
+		return -EINVAL;
+	}
+
+	if (caps2 & (MMC_CAP2_HS400_ES | MMC_CAP2_HS400) &&
+	    !(caps & MMC_CAP_8_BIT_DATA) && !(caps2 & MMC_CAP2_NO_MMC)) {
+		dev_warn(dev, "drop HS400 support since no 8-bit bus\n");
+		host->caps2 = caps2 & ~MMC_CAP2_HS400_ES & ~MMC_CAP2_HS400;
+	}
+
+	return 0;
+}
+
+/**
+ *	mmc_add_host - initialise host hardware
+ *	@host: mmc host
+ *
+ *	Register the host with the driver model. The host must be
+ *	prepared to start servicing requests before this function
+ *	completes.
+ */
+int mmc_add_host(struct mmc_host *host)
+{
+	int err;
+
+	err = mmc_validate_host_caps(host);
+	if (err)
+		return err;
+
+	err = device_add(&host->class_dev);
+	if (err)
+		return err;
+
+	led_trigger_register_simple(dev_name(&host->class_dev), &host->led);
+
+	mmc_add_host_debugfs(host);
+
+	mmc_start_host(host);
+	return 0;
+}
+
+EXPORT_SYMBOL(mmc_add_host);
+
+/**
+ *	mmc_remove_host - remove host hardware
+ *	@host: mmc host
+ *
+ *	Unregister and remove all cards associated with this host,
+ *	and power down the MMC bus. No new requests will be issued
+ *	after this function has returned.
+ */
+void mmc_remove_host(struct mmc_host *host)
+{
+	mmc_stop_host(host);
+
+	mmc_remove_host_debugfs(host);
+
+	device_del(&host->class_dev);
+
+	led_trigger_unregister_simple(host->led);
+}
+
+EXPORT_SYMBOL(mmc_remove_host);
+
+/**
+ *	mmc_free_host - free the host structure
+ *	@host: mmc host
+ *
+ *	Free the host once all references to it have been dropped.
+ */
+void mmc_free_host(struct mmc_host *host)
+{
+	mmc_pwrseq_free(host);
+	put_device(&host->class_dev);
+}
+
+EXPORT_SYMBOL(mmc_free_host);