229 lines
5.9 KiB
C
229 lines
5.9 KiB
C
|
/*
|
||
|
* Copyright (C) 2018 Intel Corporation. All rights reserved.
|
||
|
*
|
||
|
* Redistribution and use in source and binary forms, with or without
|
||
|
* modification, are permitted provided that the following conditions
|
||
|
* are met:
|
||
|
*
|
||
|
* * Redistributions of source code must retain the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer.
|
||
|
* * Redistributions in binary form must reproduce the above copyright
|
||
|
* notice, this list of conditions and the following disclaimer in
|
||
|
* the documentation and/or other materials provided with the
|
||
|
* distribution.
|
||
|
* * Neither the name of Intel Corporation nor the names of its
|
||
|
* contributors may be used to endorse or promote products derived
|
||
|
* from this software without specific prior written permission.
|
||
|
*
|
||
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
*
|
||
|
*/
|
||
|
|
||
|
#include <sys/cdefs.h>
|
||
|
#include <sys/param.h>
|
||
|
#include <sys/types.h>
|
||
|
#include <err.h>
|
||
|
#include <errno.h>
|
||
|
#include <fcntl.h>
|
||
|
#include <stdio.h>
|
||
|
#include <stdlib.h>
|
||
|
#include <stddef.h>
|
||
|
#include <stdbool.h>
|
||
|
#include <string.h>
|
||
|
#include <unistd.h>
|
||
|
#include <assert.h>
|
||
|
#include <pthread.h>
|
||
|
|
||
|
#include "dm.h"
|
||
|
#include "pci_core.h"
|
||
|
#include "virtio.h"
|
||
|
#include "mevent.h"
|
||
|
#include <linux/input.h>
|
||
|
|
||
|
static int virtio_input_debug;
|
||
|
#define DPRINTF(params) do { if (virtio_input_debug) printf params; } while (0)
|
||
|
#define WPRINTF(params) (printf params)
|
||
|
|
||
|
/*
|
||
|
* Queue definitions.
|
||
|
*/
|
||
|
#define VIRTIO_INPUT_EVENT_QUEUE 0
|
||
|
#define VIRTIO_INPUT_STATUS_QUEUE 1
|
||
|
#define VIRTIO_INPUT_MAXQ 2
|
||
|
|
||
|
/*
|
||
|
* Virtqueue size.
|
||
|
*/
|
||
|
#define VIRTIO_INPUT_RINGSZ 64
|
||
|
|
||
|
/*
|
||
|
* Default size of the buffer used to hold events between SYN
|
||
|
*/
|
||
|
#define VIRTIO_INPUT_PACKET_SIZE 10
|
||
|
|
||
|
/*
|
||
|
* Host capabilities
|
||
|
*/
|
||
|
#define VIRTIO_INPUT_S_HOSTCAPS (VIRTIO_F_VERSION_1)
|
||
|
|
||
|
enum virtio_input_config_select {
|
||
|
VIRTIO_INPUT_CFG_UNSET = 0x00,
|
||
|
VIRTIO_INPUT_CFG_ID_NAME = 0x01,
|
||
|
VIRTIO_INPUT_CFG_ID_SERIAL = 0x02,
|
||
|
VIRTIO_INPUT_CFG_ID_DEVIDS = 0x03,
|
||
|
VIRTIO_INPUT_CFG_PROP_BITS = 0x10,
|
||
|
VIRTIO_INPUT_CFG_EV_BITS = 0x11,
|
||
|
VIRTIO_INPUT_CFG_ABS_INFO = 0x12,
|
||
|
};
|
||
|
|
||
|
struct virtio_input_absinfo {
|
||
|
uint32_t min;
|
||
|
uint32_t max;
|
||
|
uint32_t fuzz;
|
||
|
uint32_t flat;
|
||
|
uint32_t res;
|
||
|
};
|
||
|
|
||
|
struct virtio_input_devids {
|
||
|
uint16_t bustype;
|
||
|
uint16_t vendor;
|
||
|
uint16_t product;
|
||
|
uint16_t version;
|
||
|
};
|
||
|
|
||
|
struct virtio_input_event {
|
||
|
uint16_t type;
|
||
|
uint16_t code;
|
||
|
uint32_t value;
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* Device-specific configuration registers
|
||
|
* To query a specific piece of configuration information FE driver sets
|
||
|
* "select" and "subsel" accordingly, information size is returned in "size"
|
||
|
* and information data is returned in union "u"
|
||
|
*/
|
||
|
struct virtio_input_config {
|
||
|
uint8_t select;
|
||
|
uint8_t subsel;
|
||
|
uint8_t size;
|
||
|
uint8_t reserved[5];
|
||
|
union {
|
||
|
char string[128];
|
||
|
uint8_t bitmap[128];
|
||
|
struct virtio_input_absinfo abs;
|
||
|
struct virtio_input_devids ids;
|
||
|
} u;
|
||
|
};
|
||
|
|
||
|
struct virtio_input_event_elem {
|
||
|
struct virtio_input_event event;
|
||
|
struct iovec iov;
|
||
|
uint16_t idx;
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* Per-device struct
|
||
|
*/
|
||
|
struct virtio_input {
|
||
|
struct virtio_base base;
|
||
|
struct virtio_vq_info queues[VIRTIO_INPUT_MAXQ];
|
||
|
pthread_mutex_t mtx;
|
||
|
struct mevent *mevp;
|
||
|
uint64_t features;
|
||
|
struct virtio_input_config cfg;
|
||
|
char *evdev;
|
||
|
char *serial;
|
||
|
int fd;
|
||
|
bool ready;
|
||
|
|
||
|
struct virtio_input_event_elem *event_queue;
|
||
|
uint32_t event_qsize;
|
||
|
uint32_t event_qindex;
|
||
|
};
|
||
|
|
||
|
static void virtio_input_reset(void *);
|
||
|
static void virtio_input_neg_features(void *, uint64_t);
|
||
|
static void virtio_input_set_status(void *, uint64_t);
|
||
|
static int virtio_input_cfgread(void *, int, int, uint32_t *);
|
||
|
static int virtio_input_cfgwrite(void *, int, int, uint32_t);
|
||
|
|
||
|
static struct virtio_ops virtio_input_ops = {
|
||
|
"virtio_input", /* our name */
|
||
|
VIRTIO_INPUT_MAXQ, /* we support VTCON_MAXQ virtqueues */
|
||
|
sizeof(struct virtio_input_config), /* config reg size */
|
||
|
virtio_input_reset, /* reset */
|
||
|
NULL, /* device-wide qnotify */
|
||
|
virtio_input_cfgread, /* read virtio config */
|
||
|
virtio_input_cfgwrite, /* write virtio config */
|
||
|
virtio_input_neg_features, /* apply negotiated features */
|
||
|
virtio_input_set_status, /* called on guest set status */
|
||
|
VIRTIO_INPUT_S_HOSTCAPS, /* our capabilities */
|
||
|
};
|
||
|
|
||
|
static void
|
||
|
virtio_input_reset(void *vdev)
|
||
|
{
|
||
|
/* to be implemented */
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
virtio_input_neg_features(void *vdev, uint64_t negotiated_features)
|
||
|
{
|
||
|
/* to be implemented */
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
virtio_input_set_status(void *vdev, uint64_t status)
|
||
|
{
|
||
|
/* to be implemented */
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
virtio_input_cfgread(void *vdev, int offset, int size, uint32_t *retval)
|
||
|
{
|
||
|
/* to be implemented */
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
virtio_input_cfgwrite(void *vdev, int offset, int size, uint32_t val)
|
||
|
{
|
||
|
/* to be implemented */
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
virtio_input_init(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
|
||
|
{
|
||
|
/* to be implemented */
|
||
|
DPRINTF(("%s\n", __func__));
|
||
|
(void)virtio_input_ops;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
virtio_input_deinit(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
|
||
|
{
|
||
|
/* to be implemented */
|
||
|
}
|
||
|
|
||
|
struct pci_vdev_ops pci_ops_virtio_input = {
|
||
|
.class_name = "virtio-input",
|
||
|
.vdev_init = virtio_input_init,
|
||
|
.vdev_deinit = virtio_input_deinit,
|
||
|
.vdev_barwrite = virtio_pci_write,
|
||
|
.vdev_barread = virtio_pci_read
|
||
|
};
|
||
|
DEFINE_PCI_DEVTYPE(pci_ops_virtio_input);
|