Merge tag 'staging-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging/IIO updates from Greg KH:
 "Here is the big Staging and IIO driver patches for 4.16-rc1.

  There is the normal amount of new IIO drivers added, like all
  releases.

  The networking IPX and the ncpfs filesystem are moved into the staging
  tree, as they are on their way out of the kernel due to lack of use
  anymore.

  The visorbus subsystem finall has started moving out of the staging
  tree to the "real" part of the kernel, and the most and fsl-mc
  codebases are almost ready to move out, that will probably happen for
  4.17-rc1 if all goes well.

  Other than that, there is a bunch of license header cleanups in the
  tree, along with the normal amount of coding style churn that we all
  know and love for this codebase. I also got frustrated at the
  Meltdown/Spectre mess and took it out on the dgnc tty driver, deleting
  huge chunks of it that were never even being used.

  Full details of everything is in the shortlog.

  All of these patches have been in linux-next for a while with no
  reported issues"

* tag 'staging-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (627 commits)
  staging: rtlwifi: remove redundant initialization of 'cfg_cmd'
  staging: rtl8723bs: remove a couple of redundant initializations
  staging: comedi: reformat lines to 80 chars or less
  staging: lustre: separate a connection destroy from free struct kib_conn
  Staging: rtl8723bs: Use !x instead of NULL comparison
  Staging: rtl8723bs: Remove dead code
  Staging: rtl8723bs: Change names to conform to the kernel code
  staging: ccree: Fix missing blank line after declaration
  staging: rtl8188eu: remove redundant initialization of 'pwrcfgcmd'
  staging: rtlwifi: remove unused RTLHALMAC_ST and RTLPHYDM_ST
  staging: fbtft: remove unused FB_TFT_SSD1325 kconfig
  staging: comedi: dt2811: remove redundant initialization of 'ns'
  staging: wilc1000: fix alignments to match open parenthesis
  staging: wilc1000: removed unnecessary defined enums typedef
  staging: wilc1000: remove unnecessary use of parentheses
  staging: rtl8192u: remove redundant initialization of 'timeout'
  staging: sm750fb: fix CamelCase for dispSet var
  staging: lustre: lnet/selftest: fix compile error on UP build
  staging: rtl8723bs: hal_com_phycfg: Remove unneeded semicolons
  staging: rts5208: Fix "seg_no" calculation in reset_ms_card()
  ...

4 files changed, 355 insertions, 3 deletions

diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index f12a61be1ede..11579fd4126e 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -578,8 +578,8 @@ const struct iio_chan_spec
  * iio_device_register() - register a device with the IIO subsystem
  * @indio_dev:		Device structure filled by the device driver
  **/
-#define iio_device_register(iio_dev) \
-	__iio_device_register((iio_dev), THIS_MODULE)
+#define iio_device_register(indio_dev) \
+	__iio_device_register((indio_dev), THIS_MODULE)
 int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod);
 void iio_device_unregister(struct iio_dev *indio_dev);
 /**
diff --git a/include/linux/iio/machine.h b/include/linux/iio/machine.h
index 1601a2a63a72..5e1cfa75f652 100644
--- a/include/linux/iio/machine.h
+++ b/include/linux/iio/machine.h
@@ -28,4 +28,11 @@ struct iio_map {
 	void *consumer_data;
 };
 
+#define IIO_MAP(_provider_channel, _consumer_dev_name, _consumer_channel) \
+{									  \
+	.adc_channel_label = _provider_channel,				  \
+	.consumer_dev_name = _consumer_dev_name,			  \
+	.consumer_channel  = _consumer_channel,				  \
+}
+
 #endif
diff --git a/include/linux/iio/trigger.h b/include/linux/iio/trigger.h
index 7d5e44518379..b19b7204ef84 100644
--- a/include/linux/iio/trigger.h
+++ b/include/linux/iio/trigger.h
@@ -43,12 +43,13 @@ struct iio_trigger_ops {
 /**
  * struct iio_trigger - industrial I/O trigger device
  * @ops:		[DRIVER] operations structure
+ * @owner:		[INTERN] owner of this driver module
  * @id:			[INTERN] unique id number
  * @name:		[DRIVER] unique name
  * @dev:		[DRIVER] associated device (if relevant)
  * @list:		[INTERN] used in maintenance of global trigger list
  * @alloc_list:		[DRIVER] used for driver specific trigger list
- * @use_count:		use count for the trigger
+ * @use_count:		[INTERN] use count for the trigger.
  * @subirq_chip:	[INTERN] associate 'virtual' irq chip.
  * @subirq_base:	[INTERN] base number for irqs provided by trigger.
  * @subirqs:		[INTERN] information about the 'child' irqs.
diff --git a/include/linux/visorbus.h b/include/linux/visorbus.h
new file mode 100644
index 000000000000..0d8bd6769b13
--- /dev/null
+++ b/include/linux/visorbus.h
@@ -0,0 +1,344 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2010 - 2013 UNISYS CORPORATION
+ * All rights reserved.
+ */
+
+/*
+ *  This header file is to be included by other kernel mode components that
+ *  implement a particular kind of visor_device.  Each of these other kernel
+ *  mode components is called a visor device driver.  Refer to visortemplate
+ *  for a minimal sample visor device driver.
+ *
+ *  There should be nothing in this file that is private to the visorbus
+ *  bus implementation itself.
+ */
+
+#ifndef __VISORBUS_H__
+#define __VISORBUS_H__
+
+#include <linux/device.h>
+
+#define VISOR_CHANNEL_SIGNATURE ('L' << 24 | 'N' << 16 | 'C' << 8 | 'E')
+
+/*
+ * enum channel_serverstate
+ * @CHANNELSRV_UNINITIALIZED: Channel is in an undefined state.
+ * @CHANNELSRV_READY:	      Channel has been initialized by server.
+ */
+enum channel_serverstate {
+	CHANNELSRV_UNINITIALIZED = 0,
+	CHANNELSRV_READY = 1
+};
+
+/*
+ * enum channel_clientstate
+ * @CHANNELCLI_DETACHED:
+ * @CHANNELCLI_DISABLED:  Client can see channel but is NOT allowed to use it
+ *			  unless given TBD* explicit request
+ *			  (should actually be < DETACHED).
+ * @CHANNELCLI_ATTACHING: Legacy EFI client request for EFI server to attach.
+ * @CHANNELCLI_ATTACHED:  Idle, but client may want to use channel any time.
+ * @CHANNELCLI_BUSY:	  Client either wants to use or is using channel.
+ * @CHANNELCLI_OWNED:	  "No worries" state - client can access channel
+ *			  anytime.
+ */
+enum channel_clientstate {
+	CHANNELCLI_DETACHED = 0,
+	CHANNELCLI_DISABLED = 1,
+	CHANNELCLI_ATTACHING = 2,
+	CHANNELCLI_ATTACHED = 3,
+	CHANNELCLI_BUSY = 4,
+	CHANNELCLI_OWNED = 5
+};
+
+/*
+ * Values for VISOR_CHANNEL_PROTOCOL.Features: This define exists so that
+ * a guest can look at the FeatureFlags in the io channel, and configure the
+ * driver to use interrupts or not based on this setting. All feature bits for
+ * all channels should be defined here. The io channel feature bits are defined
+ * below.
+ */
+#define VISOR_DRIVER_ENABLES_INTS (0x1ULL << 1)
+#define VISOR_CHANNEL_IS_POLLING (0x1ULL << 3)
+#define VISOR_IOVM_OK_DRIVER_DISABLING_INTS (0x1ULL << 4)
+#define VISOR_DRIVER_DISABLES_INTS (0x1ULL << 5)
+#define VISOR_DRIVER_ENHANCED_RCVBUF_CHECKING (0x1ULL << 6)
+
+/*
+ * struct channel_header - Common Channel Header
+ * @signature:	       Signature.
+ * @legacy_state:      DEPRECATED - being replaced by.
+ * @header_size:       sizeof(struct channel_header).
+ * @size:	       Total size of this channel in bytes.
+ * @features:	       Flags to modify behavior.
+ * @chtype:	       Channel type: data, bus, control, etc..
+ * @partition_handle:  ID of guest partition.
+ * @handle:	       Device number of this channel in client.
+ * @ch_space_offset:   Offset in bytes to channel specific area.
+ * @version_id:	       Struct channel_header Version ID.
+ * @partition_index:   Index of guest partition.
+ * @zone_uuid:	       Guid of Channel's zone.
+ * @cli_str_offset:    Offset from channel header to null-terminated
+ *		       ClientString (0 if ClientString not present).
+ * @cli_state_boot:    CHANNEL_CLIENTSTATE of pre-boot EFI client of this
+ *		       channel.
+ * @cmd_state_cli:     CHANNEL_COMMANDSTATE (overloaded in Windows drivers, see
+ *		       ServerStateUp, ServerStateDown, etc).
+ * @cli_state_os:      CHANNEL_CLIENTSTATE of Guest OS client of this channel.
+ * @ch_characteristic: CHANNEL_CHARACTERISTIC_<xxx>.
+ * @cmd_state_srv:     CHANNEL_COMMANDSTATE (overloaded in Windows drivers, see
+ *		       ServerStateUp, ServerStateDown, etc).
+ * @srv_state:	       CHANNEL_SERVERSTATE.
+ * @cli_error_boot:    Bits to indicate err states for boot clients, so err
+ *		       messages can be throttled.
+ * @cli_error_os:      Bits to indicate err states for OS clients, so err
+ *		       messages can be throttled.
+ * @filler:	       Pad out to 128 byte cacheline.
+ * @recover_channel:   Please add all new single-byte values below here.
+ */
+struct channel_header {
+	u64 signature;
+	u32 legacy_state;
+	/* SrvState, CliStateBoot, and CliStateOS below */
+	u32 header_size;
+	u64 size;
+	u64 features;
+	guid_t chtype;
+	u64 partition_handle;
+	u64 handle;
+	u64 ch_space_offset;
+	u32 version_id;
+	u32 partition_index;
+	guid_t zone_guid;
+	u32 cli_str_offset;
+	u32 cli_state_boot;
+	u32 cmd_state_cli;
+	u32 cli_state_os;
+	u32 ch_characteristic;
+	u32 cmd_state_srv;
+	u32 srv_state;
+	u8 cli_error_boot;
+	u8 cli_error_os;
+	u8 filler[1];
+	u8 recover_channel;
+} __packed;
+
+#define VISOR_CHANNEL_ENABLE_INTS (0x1ULL << 0)
+
+/*
+ * struct signal_queue_header - Subheader for the Signal Type variation of the
+ *                              Common Channel.
+ * @version:	      SIGNAL_QUEUE_HEADER Version ID.
+ * @chtype:	      Queue type: storage, network.
+ * @size:	      Total size of this queue in bytes.
+ * @sig_base_offset:  Offset to signal queue area.
+ * @features:	      Flags to modify behavior.
+ * @num_sent:	      Total # of signals placed in this queue.
+ * @num_overflows:    Total # of inserts failed due to full queue.
+ * @signal_size:      Total size of a signal for this queue.
+ * @max_slots:        Max # of slots in queue, 1 slot is always empty.
+ * @max_signals:      Max # of signals in queue (MaxSignalSlots-1).
+ * @head:	      Queue head signal #.
+ * @num_received:     Total # of signals removed from this queue.
+ * @tail:	      Queue tail signal.
+ * @reserved1:	      Reserved field.
+ * @reserved2:	      Reserved field.
+ * @client_queue:
+ * @num_irq_received: Total # of Interrupts received. This is incremented by the
+ *		      ISR in the guest windows driver.
+ * @num_empty:	      Number of times that visor_signal_remove is called and
+ *		      returned Empty Status.
+ * @errorflags:	      Error bits set during SignalReinit to denote trouble with
+ *		      client's fields.
+ * @filler:	      Pad out to 64 byte cacheline.
+ */
+struct signal_queue_header {
+	/* 1st cache line */
+	u32 version;
+	u32 chtype;
+	u64 size;
+	u64 sig_base_offset;
+	u64 features;
+	u64 num_sent;
+	u64 num_overflows;
+	u32 signal_size;
+	u32 max_slots;
+	u32 max_signals;
+	u32 head;
+	/* 2nd cache line */
+	u64 num_received;
+	u32 tail;
+	u32 reserved1;
+	u64 reserved2;
+	u64 client_queue;
+	u64 num_irq_received;
+	u64 num_empty;
+	u32 errorflags;
+	u8 filler[12];
+} __packed;
+
+/* VISORCHANNEL Guids */
+/* {414815ed-c58c-11da-95a9-00e08161165f} */
+#define VISOR_VHBA_CHANNEL_GUID \
+	GUID_INIT(0x414815ed, 0xc58c, 0x11da, \
+		  0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f)
+#define VISOR_VHBA_CHANNEL_GUID_STR \
+	"414815ed-c58c-11da-95a9-00e08161165f"
+struct visorchipset_state {
+	u32 created:1;
+	u32 attached:1;
+	u32 configured:1;
+	u32 running:1;
+	/* Remaining bits in this 32-bit word are reserved. */
+};
+
+/**
+ * struct visor_device - A device type for things "plugged" into the visorbus
+ *                       bus
+ * @visorchannel:		Points to the channel that the device is
+ *				associated with.
+ * @channel_type_guid:		Identifies the channel type to the bus driver.
+ * @device:			Device struct meant for use by the bus driver
+ *				only.
+ * @list_all:			Used by the bus driver to enumerate devices.
+ * @timer:		        Timer fired periodically to do interrupt-type
+ *				activity.
+ * @being_removed:		Indicates that the device is being removed from
+ *				the bus. Private bus driver use only.
+ * @visordriver_callback_lock:	Used by the bus driver to lock when adding and
+ *				removing devices.
+ * @pausing:			Indicates that a change towards a paused state.
+ *				is in progress. Only modified by the bus driver.
+ * @resuming:			Indicates that a change towards a running state
+ *				is in progress. Only modified by the bus driver.
+ * @chipset_bus_no:		Private field used by the bus driver.
+ * @chipset_dev_no:		Private field used the bus driver.
+ * @state:			Used to indicate the current state of the
+ *				device.
+ * @inst:			Unique GUID for this instance of the device.
+ * @name:			Name of the device.
+ * @pending_msg_hdr:		For private use by bus driver to respond to
+ *				hypervisor requests.
+ * @vbus_hdr_info:		A pointer to header info. Private use by bus
+ *				driver.
+ * @partition_guid:		Indicates client partion id. This should be the
+ *				same across all visor_devices in the current
+ *				guest. Private use by bus driver only.
+ */
+struct visor_device {
+	struct visorchannel *visorchannel;
+	guid_t channel_type_guid;
+	/* These fields are for private use by the bus driver only. */
+	struct device device;
+	struct list_head list_all;
+	struct timer_list timer;
+	bool timer_active;
+	bool being_removed;
+	struct mutex visordriver_callback_lock; /* synchronize probe/remove */
+	bool pausing;
+	bool resuming;
+	u32 chipset_bus_no;
+	u32 chipset_dev_no;
+	struct visorchipset_state state;
+	guid_t inst;
+	u8 *name;
+	struct controlvm_message_header *pending_msg_hdr;
+	void *vbus_hdr_info;
+	guid_t partition_guid;
+	struct dentry *debugfs_dir;
+	struct dentry *debugfs_bus_info;
+};
+
+#define to_visor_device(x) container_of(x, struct visor_device, device)
+
+typedef void (*visorbus_state_complete_func) (struct visor_device *dev,
+					      int status);
+
+/*
+ * This struct describes a specific visor channel, by providing its GUID, name,
+ * and sizes.
+ */
+struct visor_channeltype_descriptor {
+	const guid_t guid;
+	const char *name;
+	u64 min_bytes;
+	u32 version;
+};
+
+/**
+ * struct visor_driver - Information provided by each visor driver when it
+ *                       registers with the visorbus driver
+ * @name:		Name of the visor driver.
+ * @owner:		The module owner.
+ * @channel_types:	Types of channels handled by this driver, ending with
+ *			a zero GUID. Our specialized BUS.match() method knows
+ *			about this list, and uses it to determine whether this
+ *			driver will in fact handle a new device that it has
+ *			detected.
+ * @probe:		Called when a new device comes online, by our probe()
+ *			function specified by driver.probe() (triggered
+ *			ultimately by some call to driver_register(),
+ *			bus_add_driver(), or driver_attach()).
+ * @remove:		Called when a new device is removed, by our remove()
+ *			function specified by driver.remove() (triggered
+ *			ultimately by some call to device_release_driver()).
+ * @channel_interrupt:	Called periodically, whenever there is a possiblity
+ *			that "something interesting" may have happened to the
+ *			channel.
+ * @pause:		Called to initiate a change of the device's state.  If
+ *			the return valu`e is < 0, there was an error and the
+ *			state transition will NOT occur.  If the return value
+ *			is >= 0, then the state transition was INITIATED
+ *			successfully, and complete_func() will be called (or
+ *			was just called) with the final status when either the
+ *			state transition fails or completes successfully.
+ * @resume:		Behaves similar to pause.
+ * @driver:		Private reference to the device driver. For use by bus
+ *			driver only.
+ */
+struct visor_driver {
+	const char *name;
+	struct module *owner;
+	struct visor_channeltype_descriptor *channel_types;
+	int (*probe)(struct visor_device *dev);
+	void (*remove)(struct visor_device *dev);
+	void (*channel_interrupt)(struct visor_device *dev);
+	int (*pause)(struct visor_device *dev,
+		     visorbus_state_complete_func complete_func);
+	int (*resume)(struct visor_device *dev,
+		      visorbus_state_complete_func complete_func);
+
+	/* These fields are for private use by the bus driver only. */
+	struct device_driver driver;
+};
+
+#define to_visor_driver(x) (container_of(x, struct visor_driver, driver))
+
+int visor_check_channel(struct channel_header *ch, struct device *dev,
+			const guid_t *expected_uuid, char *chname,
+			u64 expected_min_bytes,	u32 expected_version,
+			u64 expected_signature);
+
+int visorbus_register_visor_driver(struct visor_driver *drv);
+void visorbus_unregister_visor_driver(struct visor_driver *drv);
+int visorbus_read_channel(struct visor_device *dev,
+			  unsigned long offset, void *dest,
+			  unsigned long nbytes);
+int visorbus_write_channel(struct visor_device *dev,
+			   unsigned long offset, void *src,
+			   unsigned long nbytes);
+int visorbus_enable_channel_interrupts(struct visor_device *dev);
+void visorbus_disable_channel_interrupts(struct visor_device *dev);
+
+int visorchannel_signalremove(struct visorchannel *channel, u32 queue,
+			      void *msg);
+int visorchannel_signalinsert(struct visorchannel *channel, u32 queue,
+			      void *msg);
+bool visorchannel_signalempty(struct visorchannel *channel, u32 queue);
+const guid_t *visorchannel_get_guid(struct visorchannel *channel);
+
+#define BUS_ROOT_DEVICE UINT_MAX
+struct visor_device *visorbus_get_device_by_id(u32 bus_no, u32 dev_no,
+					       struct visor_device *from);
+#endif