7 files changed, 388 insertions, 101 deletions

diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index fcb51c88319f..21c59af1150b 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -51,10 +51,10 @@
 enum extcon_cable_name {
         EXTCON_USB = 0,
         EXTCON_USB_HOST,
-        EXTCON_TA, /* Travel Adaptor */
+        EXTCON_TA,                      /* Travel Adaptor */
         EXTCON_FAST_CHARGER,
         EXTCON_SLOW_CHARGER,
-        EXTCON_CHARGE_DOWNSTREAM, /* Charging an external device */
+        EXTCON_CHARGE_DOWNSTREAM,       /* Charging an external device */
         EXTCON_HDMI,
         EXTCON_MHL,
         EXTCON_DVI,
@@ -76,8 +76,8 @@ struct extcon_cable;
 
 /**
  * struct extcon_dev - An extcon device represents one external connector.
- * @name:       The name of this extcon device. Parent device name is used
- *              if NULL.
+ * @name:               The name of this extcon device. Parent device name is
+ *                      used if NULL.
  * @supported_cable:    Array of supported cable names ending with NULL.
  *                      If supported_cable is NULL, cable name related APIs
  *                      are disabled.
@@ -89,21 +89,21 @@ struct extcon_cable;
  *                      be attached simulataneously. {0x7, 0} is equivalent to
  *                      {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
  *                      can be no simultaneous connections.
- * @print_name: An optional callback to override the method to print the
- *              name of the extcon device.
+ * @print_name:         An optional callback to override the method to print the
+ *                      name of the extcon device.
  * @print_state:        An optional callback to override the method to print the
- *              status of the extcon device.
- * @dev:        Device of this extcon. Do not provide at register-time.
- * @state:      Attach/detach state of this extcon. Do not provide at
- *              register-time
- * @nh: Notifier for the state change events from this extcon
- * @entry:      To support list of extcon devices so that users can search
- *              for extcon devices based on the extcon name.
+ *                      status of the extcon device.
+ * @dev:                Device of this extcon.
+ * @state:              Attach/detach state of this extcon. Do not provide at
+ *                      register-time.
+ * @nh:                 Notifier for the state change events from this extcon
+ * @entry:              To support list of extcon devices so that users can search
+ *                      for extcon devices based on the extcon name.
  * @lock:
  * @max_supported:      Internal value to store the number of cables.
  * @extcon_dev_type:    Device_type struct to provide attribute_groups
  *                      customized for each extcon device.
- * @cables:     Sysfs subdirectories. Each represents one cable.
+ * @cables:             Sysfs subdirectories. Each represents one cable.
  *
  * In most cases, users only need to provide "User initializing data" of
  * this struct when registering an extcon. In some exceptional cases,
@@ -111,26 +111,27 @@ struct extcon_cable;
  * are overwritten by register function.
  */
 struct extcon_dev {
-        /* --- Optional user initializing data --- */
-        const char      *name;
+        /* Optional user initializing data */
+        const char *name;
         const char **supported_cable;
-        const u32       *mutually_exclusive;
+        const u32 *mutually_exclusive;
 
-        /* --- Optional callbacks to override class functions --- */
+        /* Optional callbacks to override class functions */
         ssize_t (*print_name)(struct extcon_dev *edev, char *buf);
         ssize_t (*print_state)(struct extcon_dev *edev, char *buf);
 
-        /* --- Internal data. Please do not set. --- */
-        struct device   *dev;
-        u32             state;
+        /* Internal data. Please do not set. */
+        struct device dev;
         struct raw_notifier_head nh;
         struct list_head entry;
-        spinlock_t lock; /* could be called by irq handler */
         int max_supported;
+        spinlock_t lock;        /* could be called by irq handler */
+        u32 state;
 
         /* /sys/class/extcon/.../cable.n/... */
         struct device_type extcon_dev_type;
         struct extcon_cable *cables;
+
         /* /sys/class/extcon/.../mutually_exclusive/... */
         struct attribute_group attr_g_muex;
         struct attribute **attrs_muex;
@@ -138,13 +139,13 @@ struct extcon_dev {
 };
 
 /**
- * struct extcon_cable  - An internal data for each cable of extcon device.
- * @edev:       The extcon device
+ * struct extcon_cable - An internal data for each cable of extcon device.
+ * @edev:               The extcon device
  * @cable_index:        Index of this cable in the edev
- * @attr_g:     Attribute group for the cable
- * @attr_name:  "name" sysfs entry
- * @attr_state: "state" sysfs entry
- * @attrs:      Array pointing to attr_name and attr_state for attr_g
+ * @attr_g:             Attribute group for the cable
+ * @attr_name:          "name" sysfs entry
+ * @attr_state:         "state" sysfs entry
+ * @attrs:              Array pointing to attr_name and attr_state for attr_g
  */
 struct extcon_cable {
         struct extcon_dev *edev;
@@ -159,11 +160,13 @@ struct extcon_cable {
 
 /**
  * struct extcon_specific_cable_nb - An internal data for
- *                              extcon_register_interest().
- * @internal_nb:        a notifier block bridging extcon notifier and cable notifier.
- * @user_nb:    user provided notifier block for events from a specific cable.
+ *                                   extcon_register_interest().
+ * @internal_nb:        A notifier block bridging extcon notifier
+ *                      and cable notifier.
+ * @user_nb:            user provided notifier block for events from
+ *                      a specific cable.
  * @cable_index:        the target cable.
- * @edev:       the target extcon device.
+ * @edev:               the target extcon device.
  * @previous_value:     the saved previous event value.
  */
 struct extcon_specific_cable_nb {
@@ -180,7 +183,7 @@ struct extcon_specific_cable_nb {
  * Following APIs are for notifiers or configurations.
  * Notifiers are the external port and connection devices.
  */
-extern int extcon_dev_register(struct extcon_dev *edev, struct device *dev);
+extern int extcon_dev_register(struct extcon_dev *edev);
 extern void extcon_dev_unregister(struct extcon_dev *edev);
 extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
 
@@ -238,8 +241,7 @@ extern int extcon_register_notifier(struct extcon_dev *edev,
 extern int extcon_unregister_notifier(struct extcon_dev *edev,
                                       struct notifier_block *nb);
 #else /* CONFIG_EXTCON */
-static inline int extcon_dev_register(struct extcon_dev *edev,
-                                      struct device *dev)
+static inline int extcon_dev_register(struct extcon_dev *edev)
 {
         return 0;
 }
diff --git a/include/linux/extcon/extcon-adc-jack.h b/include/linux/extcon/extcon-adc-jack.h
index 20e9eef25d4c..9ca958c4e94c 100644
--- a/include/linux/extcon/extcon-adc-jack.h
+++ b/include/linux/extcon/extcon-adc-jack.h
@@ -20,10 +20,10 @@
 
 /**
  * struct adc_jack_cond - condition to use an extcon state
- * @state      - the corresponding extcon state (if 0, this struct denotes
- *             the last adc_jack_cond element among the array)
- * @min_adc    - min adc value for this condition
- * @max_adc    - max adc value for this condition
+ * @state:              the corresponding extcon state (if 0, this struct
+ *                      denotes the last adc_jack_cond element among the array)
+ * @min_adc:            min adc value for this condition
+ * @max_adc:            max adc value for this condition
  *
  * For example, if { .state = 0x3, .min_adc = 100, .max_adc = 200}, it means
  * that if ADC value is between (inclusive) 100 and 200, than the cable 0 and
@@ -33,34 +33,34 @@
  * because when no adc_jack_cond is met, state = 0 is automatically chosen.
  */
 struct adc_jack_cond {
-        u32 state; /* extcon state value. 0 if invalid */
+        u32 state;      /* extcon state value. 0 if invalid */
         u32 min_adc;
         u32 max_adc;
 };
 
 /**
  * struct adc_jack_pdata - platform data for adc jack device.
- * @name       - name of the extcon device. If null, "adc-jack" is used.
- * @consumer_channel - Unique name to identify the channel on the consumer
- *                   side. This typically describes the channels used within
- *                   the consumer. E.g. 'battery_voltage'
- * @cable_names        - array of cable names ending with null.
- * @adc_contitions     - array of struct adc_jack_cond conditions ending
- *                     with .state = 0 entry. This describes how to decode
- *                     adc values into extcon state.
- * @irq_flags  - irq flags used for the @irq
- * @handling_delay_ms  - in some devices, we need to read ADC value some
- *                     milli-seconds after the interrupt occurs. You may
- *                     describe such delays with @handling_delay_ms, which
- *                     is rounded-off by jiffies.
+ * @name:               name of the extcon device. If null, "adc-jack" is used.
+ * @consumer_channel:   Unique name to identify the channel on the consumer
+ *                      side. This typically describes the channels used within
+ *                      the consumer. E.g. 'battery_voltage'
+ * @cable_names:        array of cable names ending with null.
+ * @adc_contitions:     array of struct adc_jack_cond conditions ending
+ *                      with .state = 0 entry. This describes how to decode
+ *                      adc values into extcon state.
+ * @irq_flags:          irq flags used for the @irq
+ * @handling_delay_ms:  in some devices, we need to read ADC value some
+ *                      milli-seconds after the interrupt occurs. You may
+ *                      describe such delays with @handling_delay_ms, which
+ *                      is rounded-off by jiffies.
  */
 struct adc_jack_pdata {
         const char *name;
         const char *consumer_channel;
-        /*
-         * The last entry should be NULL
-         */
+
+        /* The last entry should be NULL */
         const char **cable_names;
+
         /* The last entry's state should be 0 */
         struct adc_jack_cond *adc_conditions;
 
diff --git a/include/linux/extcon/extcon-gpio.h b/include/linux/extcon/extcon-gpio.h
index 2d8307f7d67d..4195810f87fe 100644
--- a/include/linux/extcon/extcon-gpio.h
+++ b/include/linux/extcon/extcon-gpio.h
@@ -25,14 +25,17 @@
 
 /**
  * struct gpio_extcon_platform_data - A simple GPIO-controlled extcon device.
- * @name        The name of this GPIO extcon device.
- * @gpio        Corresponding GPIO.
- * @debounce    Debounce time for GPIO IRQ in ms.
- * @irq_flags   IRQ Flags (e.g., IRQF_TRIGGER_LOW).
- * @state_on    print_state is overriden with state_on if attached. If Null,
- *              default method of extcon class is used.
- * @state_off   print_state is overriden with state_on if detached. If Null,
- *              default method of extcon class is used.
+ * @name:               The name of this GPIO extcon device.
+ * @gpio:               Corresponding GPIO.
+ * @gpio_active_low:    Boolean describing whether gpio active state is 1 or 0
+ *                      If true, low state of gpio means active.
+ *                      If false, high state of gpio means active.
+ * @debounce:           Debounce time for GPIO IRQ in ms.
+ * @irq_flags:          IRQ Flags (e.g., IRQF_TRIGGER_LOW).
+ * @state_on:           print_state is overriden with state_on if attached.
+ *                      If NULL, default method of extcon class is used.
+ * @state_off:          print_state is overriden with state_on if detached.
+ *                      If NUll, default method of extcon class is used.
  *
  * Note that in order for state_on or state_off to be valid, both state_on
  * and state_off should be not NULL. If at least one of them is NULL,
@@ -41,6 +44,7 @@
 struct gpio_extcon_platform_data {
         const char *name;
         unsigned gpio;
+        bool gpio_active_low;
         unsigned long debounce;
         unsigned long irq_flags;
 
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index d98503bde7e9..15da677478dd 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -432,15 +432,6 @@ struct hv_ring_buffer_info {
         u32 ring_data_startoffset;
 };
 
-struct hv_ring_buffer_debug_info {
-        u32 current_interrupt_mask;
-        u32 current_read_index;
-        u32 current_write_index;
-        u32 bytes_avail_toread;
-        u32 bytes_avail_towrite;
-};
-
-
 /*
  *
  * hv_get_ringbuffer_availbytes()
@@ -902,23 +893,6 @@ enum vmbus_channel_state {
         CHANNEL_OPENED_STATE,
 };
 
-struct vmbus_channel_debug_info {
-        u32 relid;
-        enum vmbus_channel_state state;
-        uuid_le interfacetype;
-        uuid_le interface_instance;
-        u32 monitorid;
-        u32 servermonitor_pending;
-        u32 servermonitor_latency;
-        u32 servermonitor_connectionid;
-        u32 clientmonitor_pending;
-        u32 clientmonitor_latency;
-        u32 clientmonitor_connectionid;
-
-        struct hv_ring_buffer_debug_info inbound;
-        struct hv_ring_buffer_debug_info outbound;
-};
-
 /*
  * Represents each channel msg on the vmbus connection This is a
  * variable-size data structure depending on the msg type itself
@@ -1184,19 +1158,8 @@ extern int vmbus_recvpacket_raw(struct vmbus_channel *channel,
                                      u64 *requestid);
 
 
-extern void vmbus_get_debug_info(struct vmbus_channel *channel,
-                                     struct vmbus_channel_debug_info *debug);
-
 extern void vmbus_ontimer(unsigned long data);
 
-struct hv_dev_port_info {
-        u32 int_mask;
-        u32 read_idx;
-        u32 write_idx;
-        u32 bytes_avail_toread;
-        u32 bytes_avail_towrite;
-};
-
 /* Base driver object */
 struct hv_driver {
         const char *name;
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 115add2515aa..33d2b8fe166d 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -241,6 +241,8 @@ header-y += media.h
 header-y += mei.h
 header-y += mempolicy.h
 header-y += meye.h
+header-y += mic_common.h
+header-y += mic_ioctl.h
 header-y += mii.h
 header-y += minix_fs.h
 header-y += mman.h
diff --git a/include/uapi/linux/mic_common.h b/include/uapi/linux/mic_common.h
new file mode 100644
index 000000000000..17e7d95e4f53
--- /dev/null
+++ b/include/uapi/linux/mic_common.h
@@ -0,0 +1,240 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2013 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC driver.
+ *
+ */
+#ifndef __MIC_COMMON_H_
+#define __MIC_COMMON_H_
+
+#include <linux/virtio_ring.h>
+
+#ifndef __KERNEL__
+#define ALIGN(a, x)     (((a) + (x) - 1) & ~((x) - 1))
+#define __aligned(x)    __attribute__ ((aligned(x)))
+#endif
+
+#define mic_aligned_size(x) ALIGN(sizeof(x), 8)
+
+/**
+ * struct mic_device_desc: Virtio device information shared between the
+ * virtio driver and userspace backend
+ *
+ * @type: Device type: console/network/disk etc.  Type 0/-1 terminates.
+ * @num_vq: Number of virtqueues.
+ * @feature_len: Number of bytes of feature bits.  Multiply by 2: one for
+   host features and one for guest acknowledgements.
+ * @config_len: Number of bytes of the config array after virtqueues.
+ * @status: A status byte, written by the Guest.
+ * @config: Start of the following variable length config.
+ */
+struct mic_device_desc {
+        __s8 type;
+        __u8 num_vq;
+        __u8 feature_len;
+        __u8 config_len;
+        __u8 status;
+        __u64 config[0];
+} __aligned(8);
+
+/**
+ * struct mic_device_ctrl: Per virtio device information in the device page
+ * used internally by the host and card side drivers.
+ *
+ * @vdev: Used for storing MIC vdev information by the guest.
+ * @config_change: Set to 1 by host when a config change is requested.
+ * @vdev_reset: Set to 1 by guest to indicate virtio device has been reset.
+ * @guest_ack: Set to 1 by guest to ack a command.
+ * @host_ack: Set to 1 by host to ack a command.
+ * @used_address_updated: Set to 1 by guest when the used address should be
+ * updated.
+ * @c2h_vdev_db: The doorbell number to be used by guest. Set by host.
+ * @h2c_vdev_db: The doorbell number to be used by host. Set by guest.
+ */
+struct mic_device_ctrl {
+        __u64 vdev;
+        __u8 config_change;
+        __u8 vdev_reset;
+        __u8 guest_ack;
+        __u8 host_ack;
+        __u8 used_address_updated;
+        __s8 c2h_vdev_db;
+        __s8 h2c_vdev_db;
+} __aligned(8);
+
+/**
+ * struct mic_bootparam: Virtio device independent information in device page
+ *
+ * @magic: A magic value used by the card to ensure it can see the host
+ * @c2h_shutdown_db: Card to Host shutdown doorbell set by host
+ * @h2c_shutdown_db: Host to Card shutdown doorbell set by card
+ * @h2c_config_db: Host to Card Virtio config doorbell set by card
+ * @shutdown_status: Card shutdown status set by card
+ * @shutdown_card: Set to 1 by the host when a card shutdown is initiated
+ */
+struct mic_bootparam {
+        __u32 magic;
+        __s8 c2h_shutdown_db;
+        __s8 h2c_shutdown_db;
+        __s8 h2c_config_db;
+        __u8 shutdown_status;
+        __u8 shutdown_card;
+} __aligned(8);
+
+/**
+ * struct mic_device_page: High level representation of the device page
+ *
+ * @bootparam: The bootparam structure is used for sharing information and
+ * status updates between MIC host and card drivers.
+ * @desc: Array of MIC virtio device descriptors.
+ */
+struct mic_device_page {
+        struct mic_bootparam bootparam;
+        struct mic_device_desc desc[0];
+};
+/**
+ * struct mic_vqconfig: This is how we expect the device configuration field
+ * for a virtqueue to be laid out in config space.
+ *
+ * @address: Guest/MIC physical address of the virtio ring
+ * (avail and desc rings)
+ * @used_address: Guest/MIC physical address of the used ring
+ * @num: The number of entries in the virtio_ring
+ */
+struct mic_vqconfig {
+        __u64 address;
+        __u64 used_address;
+        __u16 num;
+} __aligned(8);
+
+/*
+ * The alignment to use between consumer and producer parts of vring.
+ * This is pagesize for historical reasons.
+ */
+#define MIC_VIRTIO_RING_ALIGN           4096
+
+#define MIC_MAX_VRINGS                  4
+#define MIC_VRING_ENTRIES               128
+
+/*
+ * Max vring entries (power of 2) to ensure desc and avail rings
+ * fit in a single page
+ */
+#define MIC_MAX_VRING_ENTRIES           128
+
+/**
+ * Max size of the desc block in bytes: includes:
+ *      - struct mic_device_desc
+ *      - struct mic_vqconfig (num_vq of these)
+ *      - host and guest features
+ *      - virtio device config space
+ */
+#define MIC_MAX_DESC_BLK_SIZE           256
+
+/**
+ * struct _mic_vring_info - Host vring info exposed to userspace backend
+ * for the avail index and magic for the card.
+ *
+ * @avail_idx: host avail idx
+ * @magic: A magic debug cookie.
+ */
+struct _mic_vring_info {
+        __u16 avail_idx;
+        int magic;
+};
+
+/**
+ * struct mic_vring - Vring information.
+ *
+ * @vr: The virtio ring.
+ * @info: Host vring information exposed to the userspace backend for the
+ * avail index and magic for the card.
+ * @va: The va for the buffer allocated for vr and info.
+ * @len: The length of the buffer required for allocating vr and info.
+ */
+struct mic_vring {
+        struct vring vr;
+        struct _mic_vring_info *info;
+        void *va;
+        int len;
+};
+
+#define mic_aligned_desc_size(d) ALIGN(mic_desc_size(d), 8)
+
+#ifndef INTEL_MIC_CARD
+static inline unsigned mic_desc_size(const struct mic_device_desc *desc)
+{
+        return mic_aligned_size(*desc)
+                + desc->num_vq * mic_aligned_size(struct mic_vqconfig)
+                + desc->feature_len * 2
+                + desc->config_len;
+}
+
+static inline struct mic_vqconfig *
+mic_vq_config(const struct mic_device_desc *desc)
+{
+        return (struct mic_vqconfig *)(desc + 1);
+}
+
+static inline __u8 *mic_vq_features(const struct mic_device_desc *desc)
+{
+        return (__u8 *)(mic_vq_config(desc) + desc->num_vq);
+}
+
+static inline __u8 *mic_vq_configspace(const struct mic_device_desc *desc)
+{
+        return mic_vq_features(desc) + desc->feature_len * 2;
+}
+static inline unsigned mic_total_desc_size(struct mic_device_desc *desc)
+{
+        return mic_aligned_desc_size(desc) +
+                mic_aligned_size(struct mic_device_ctrl);
+}
+#endif
+
+/* Device page size */
+#define MIC_DP_SIZE 4096
+
+#define MIC_MAGIC 0xc0ffee00
+
+/**
+ * enum mic_states - MIC states.
+ */
+enum mic_states {
+        MIC_OFFLINE = 0,
+        MIC_ONLINE,
+        MIC_SHUTTING_DOWN,
+        MIC_RESET_FAILED,
+        MIC_SUSPENDING,
+        MIC_SUSPENDED,
+        MIC_LAST
+};
+
+/**
+ * enum mic_status - MIC status reported by card after
+ * a host or card initiated shutdown or a card crash.
+ */
+enum mic_status {
+        MIC_NOP = 0,
+        MIC_CRASHED,
+        MIC_HALTED,
+        MIC_POWER_OFF,
+        MIC_RESTART,
+        MIC_STATUS_LAST
+};
+
+#endif
diff --git a/include/uapi/linux/mic_ioctl.h b/include/uapi/linux/mic_ioctl.h
new file mode 100644
index 000000000000..7fabba5059cf
--- /dev/null
+++ b/include/uapi/linux/mic_ioctl.h
@@ -0,0 +1,76 @@
+/*
+ * Intel MIC Platform Software Stack (MPSS)
+ *
+ * Copyright(c) 2013 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * Intel MIC Host driver.
+ *
+ */
+#ifndef _MIC_IOCTL_H_
+#define _MIC_IOCTL_H_
+
+#include <linux/types.h>
+
+/*
+ * mic_copy - MIC virtio descriptor copy.
+ *
+ * @iov: An array of IOVEC structures containing user space buffers.
+ * @iovcnt: Number of IOVEC structures in iov.
+ * @vr_idx: The vring index.
+ * @update_used: A non zero value results in used index being updated.
+ * @out_len: The aggregate of the total length written to or read from
+ *      the virtio device.
+ */
+struct mic_copy_desc {
+#ifdef __KERNEL__
+        struct iovec __user *iov;
+#else
+        struct iovec *iov;
+#endif
+        int iovcnt;
+        __u8 vr_idx;
+        __u8 update_used;
+        __u32 out_len;
+};
+
+/*
+ * Add a new virtio device
+ * The (struct mic_device_desc *) pointer points to a device page entry
+ *      for the virtio device consisting of:
+ *      - struct mic_device_desc
+ *      - struct mic_vqconfig (num_vq of these)
+ *      - host and guest features
+ *      - virtio device config space
+ * The total size referenced by the pointer should equal the size returned
+ * by desc_size() in mic_common.h
+ */
+#define MIC_VIRTIO_ADD_DEVICE _IOWR('s', 1, struct mic_device_desc *)
+
+/*
+ * Copy the number of entries in the iovec and update the used index
+ * if requested by the user.
+ */
+#define MIC_VIRTIO_COPY_DESC    _IOWR('s', 2, struct mic_copy_desc *)
+
+/*
+ * Notify virtio device of a config change
+ * The (__u8 *) pointer points to config space values for the device
+ * as they should be written into the device page. The total size
+ * referenced by the pointer should equal the config_len field of struct
+ * mic_device_desc.
+ */
+#define MIC_VIRTIO_CONFIG_CHANGE _IOWR('s', 5, __u8 *)
+
+#endif