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qemu-e2k/hw/usb/host-libusb.c
Miroslav Rezanina 5ab8ba977d host-libusb: Remove unused variable 
Variable unconnected used in usb_host_auto_check function is only incremented
but never read as line where it is read was disabled since introducing the code.
This causes 'Unused but set variable' warning on Clang 15.0.1 compiler.

Removing the variable and disabled code to prevent the warning.

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <00df0db69ff9167d38bac81f6d03281955bd861a.1668009030.git.mrezanin@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2022-11-11 09:12:10 +01:00

1965 lines
58 KiB
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/*
* Linux host USB redirector
*
* Copyright (c) 2005 Fabrice Bellard
*
* Copyright (c) 2008 Max Krasnyansky
* Support for host device auto connect & disconnect
* Major rewrite to support fully async operation
*
* Copyright 2008 TJ <linux@tjworld.net>
* Added flexible support for /dev/bus/usb /sys/bus/usb/devices in addition
* to the legacy /proc/bus/usb USB device discovery and handling
*
* (c) 2012 Gerd Hoffmann <kraxel@redhat.com>
* Completely rewritten to use libusb instead of usbfs ioctls.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qom/object.h"
#ifndef CONFIG_WIN32
#include <poll.h>
#endif
#include <libusb.h>
#ifdef CONFIG_LINUX
#include <sys/ioctl.h>
#include <linux/usbdevice_fs.h>
#endif
#include "qapi/error.h"
#include "migration/vmstate.h"
#include "monitor/monitor.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "sysemu/runstate.h"
#include "sysemu/sysemu.h"
#include "trace.h"
#include "hw/qdev-properties.h"
#include "hw/usb.h"
/* ------------------------------------------------------------------------ */
#define TYPE_USB_HOST_DEVICE "usb-host"
OBJECT_DECLARE_SIMPLE_TYPE(USBHostDevice, USB_HOST_DEVICE)
typedef struct USBHostRequest USBHostRequest;
typedef struct USBHostIsoXfer USBHostIsoXfer;
typedef struct USBHostIsoRing USBHostIsoRing;
struct USBAutoFilter {
uint32_t bus_num;
uint32_t addr;
char *port;
uint32_t vendor_id;
uint32_t product_id;
};
enum USBHostDeviceOptions {
USB_HOST_OPT_PIPELINE,
};
struct USBHostDevice {
USBDevice parent_obj;
/* properties */
struct USBAutoFilter match;
char *hostdevice;
int32_t bootindex;
uint32_t iso_urb_count;
uint32_t iso_urb_frames;
uint32_t options;
uint32_t loglevel;
bool needs_autoscan;
bool allow_one_guest_reset;
bool allow_all_guest_resets;
bool suppress_remote_wake;
/* state */
QTAILQ_ENTRY(USBHostDevice) next;
int seen, errcount;
int bus_num;
int addr;
char port[16];
int hostfd;
libusb_device *dev;
libusb_device_handle *dh;
struct libusb_device_descriptor ddesc;
struct {
bool detached;
bool claimed;
} ifs[USB_MAX_INTERFACES];
/* callbacks & friends */
QEMUBH *bh_nodev;
QEMUBH *bh_postld;
bool bh_postld_pending;
Notifier exit;
/* request queues */
QTAILQ_HEAD(, USBHostRequest) requests;
QTAILQ_HEAD(, USBHostIsoRing) isorings;
};
struct USBHostRequest {
USBHostDevice *host;
USBPacket *p;
bool in;
struct libusb_transfer *xfer;
unsigned char *buffer;
unsigned char *cbuf;
unsigned int clen;
bool usb3ep0quirk;
QTAILQ_ENTRY(USBHostRequest) next;
};
struct USBHostIsoXfer {
USBHostIsoRing *ring;
struct libusb_transfer *xfer;
bool copy_complete;
unsigned int packet;
QTAILQ_ENTRY(USBHostIsoXfer) next;
};
struct USBHostIsoRing {
USBHostDevice *host;
USBEndpoint *ep;
QTAILQ_HEAD(, USBHostIsoXfer) unused;
QTAILQ_HEAD(, USBHostIsoXfer) inflight;
QTAILQ_HEAD(, USBHostIsoXfer) copy;
QTAILQ_ENTRY(USBHostIsoRing) next;
};
static QTAILQ_HEAD(, USBHostDevice) hostdevs =
QTAILQ_HEAD_INITIALIZER(hostdevs);
static void usb_host_auto_check(void *unused);
static void usb_host_release_interfaces(USBHostDevice *s);
static void usb_host_nodev(USBHostDevice *s);
static void usb_host_detach_kernel(USBHostDevice *s);
static void usb_host_attach_kernel(USBHostDevice *s);
/* ------------------------------------------------------------------------ */
#ifndef LIBUSB_LOG_LEVEL_WARNING /* older libusb didn't define these */
#define LIBUSB_LOG_LEVEL_WARNING 2
#endif
/* ------------------------------------------------------------------------ */
#define CONTROL_TIMEOUT 10000 /* 10 sec */
#define BULK_TIMEOUT 0 /* unlimited */
#define INTR_TIMEOUT 0 /* unlimited */
#ifndef LIBUSB_API_VERSION
# define LIBUSB_API_VERSION LIBUSBX_API_VERSION
#endif
#if LIBUSB_API_VERSION >= 0x01000103
# define HAVE_STREAMS 1
#endif
#if LIBUSB_API_VERSION >= 0x01000106
# define HAVE_SUPER_PLUS 1
#endif
static const char *speed_name[] = {
[LIBUSB_SPEED_UNKNOWN] = "?",
[LIBUSB_SPEED_LOW] = "1.5",
[LIBUSB_SPEED_FULL] = "12",
[LIBUSB_SPEED_HIGH] = "480",
[LIBUSB_SPEED_SUPER] = "5000",
#ifdef HAVE_SUPER_PLUS
[LIBUSB_SPEED_SUPER_PLUS] = "5000+",
#endif
};
static const unsigned int speed_map[] = {
[LIBUSB_SPEED_LOW] = USB_SPEED_LOW,
[LIBUSB_SPEED_FULL] = USB_SPEED_FULL,
[LIBUSB_SPEED_HIGH] = USB_SPEED_HIGH,
[LIBUSB_SPEED_SUPER] = USB_SPEED_SUPER,
#ifdef HAVE_SUPER_PLUS
[LIBUSB_SPEED_SUPER_PLUS] = USB_SPEED_SUPER,
#endif
};
static const unsigned int status_map[] = {
[LIBUSB_TRANSFER_COMPLETED] = USB_RET_SUCCESS,
[LIBUSB_TRANSFER_ERROR] = USB_RET_IOERROR,
[LIBUSB_TRANSFER_TIMED_OUT] = USB_RET_IOERROR,
[LIBUSB_TRANSFER_CANCELLED] = USB_RET_IOERROR,
[LIBUSB_TRANSFER_STALL] = USB_RET_STALL,
[LIBUSB_TRANSFER_NO_DEVICE] = USB_RET_NODEV,
[LIBUSB_TRANSFER_OVERFLOW] = USB_RET_BABBLE,
};
static const char *err_names[] = {
[-LIBUSB_ERROR_IO] = "IO",
[-LIBUSB_ERROR_INVALID_PARAM] = "INVALID_PARAM",
[-LIBUSB_ERROR_ACCESS] = "ACCESS",
[-LIBUSB_ERROR_NO_DEVICE] = "NO_DEVICE",
[-LIBUSB_ERROR_NOT_FOUND] = "NOT_FOUND",
[-LIBUSB_ERROR_BUSY] = "BUSY",
[-LIBUSB_ERROR_TIMEOUT] = "TIMEOUT",
[-LIBUSB_ERROR_OVERFLOW] = "OVERFLOW",
[-LIBUSB_ERROR_PIPE] = "PIPE",
[-LIBUSB_ERROR_INTERRUPTED] = "INTERRUPTED",
[-LIBUSB_ERROR_NO_MEM] = "NO_MEM",
[-LIBUSB_ERROR_NOT_SUPPORTED] = "NOT_SUPPORTED",
[-LIBUSB_ERROR_OTHER] = "OTHER",
};
static libusb_context *ctx;
static uint32_t loglevel;
#ifndef CONFIG_WIN32
static void usb_host_handle_fd(void *opaque)
{
struct timeval tv = { 0, 0 };
libusb_handle_events_timeout(ctx, &tv);
}
static void usb_host_add_fd(int fd, short events, void *user_data)
{
qemu_set_fd_handler(fd,
(events & POLLIN) ? usb_host_handle_fd : NULL,
(events & POLLOUT) ? usb_host_handle_fd : NULL,
ctx);
}
static void usb_host_del_fd(int fd, void *user_data)
{
qemu_set_fd_handler(fd, NULL, NULL, NULL);
}
#else
static QEMUTimer *poll_timer;
static uint32_t request_count;
static void usb_host_timer_kick(void)
{
int64_t delay_ns;
delay_ns = request_count
? (NANOSECONDS_PER_SECOND / 100) /* 10 ms interval with active req */
: (NANOSECONDS_PER_SECOND); /* 1 sec interval otherwise */
timer_mod(poll_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + delay_ns);
}
static void usb_host_timer(void *opaque)
{
struct timeval tv = { 0, 0 };
libusb_handle_events_timeout(ctx, &tv);
usb_host_timer_kick();
}
#endif /* !CONFIG_WIN32 */
static int usb_host_init(void)
{
#ifndef CONFIG_WIN32
const struct libusb_pollfd **poll;
#endif
int rc;
if (ctx) {
return 0;
}
rc = libusb_init(&ctx);
if (rc != 0) {
return -1;
}
#if LIBUSB_API_VERSION >= 0x01000106
libusb_set_option(ctx, LIBUSB_OPTION_LOG_LEVEL, loglevel);
#else
libusb_set_debug(ctx, loglevel);
#endif
#ifdef CONFIG_WIN32
poll_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, usb_host_timer, NULL);
usb_host_timer_kick();
#else
libusb_set_pollfd_notifiers(ctx, usb_host_add_fd,
usb_host_del_fd,
ctx);
poll = libusb_get_pollfds(ctx);
if (poll) {
int i;
for (i = 0; poll[i] != NULL; i++) {
usb_host_add_fd(poll[i]->fd, poll[i]->events, ctx);
}
}
free(poll);
#endif
return 0;
}
static int usb_host_get_port(libusb_device *dev, char *port, size_t len)
{
uint8_t path[7];
size_t off;
int rc, i;
#if LIBUSB_API_VERSION >= 0x01000102
rc = libusb_get_port_numbers(dev, path, 7);
#else
rc = libusb_get_port_path(ctx, dev, path, 7);
#endif
if (rc < 0) {
return 0;
}
off = snprintf(port, len, "%d", path[0]);
for (i = 1; i < rc; i++) {
off += snprintf(port+off, len-off, ".%d", path[i]);
}
return off;
}
static void usb_host_libusb_error(const char *func, int rc)
{
const char *errname;
if (rc >= 0) {
return;
}
if (-rc < ARRAY_SIZE(err_names) && err_names[-rc]) {
errname = err_names[-rc];
} else {
errname = "?";
}
error_report("%s: %d [%s]", func, rc, errname);
}
/* ------------------------------------------------------------------------ */
static bool usb_host_use_combining(USBEndpoint *ep)
{
int type;
if (!ep->pipeline) {
return false;
}
if (ep->pid != USB_TOKEN_IN) {
return false;
}
type = usb_ep_get_type(ep->dev, ep->pid, ep->nr);
if (type != USB_ENDPOINT_XFER_BULK) {
return false;
}
return true;
}
/* ------------------------------------------------------------------------ */
static USBHostRequest *usb_host_req_alloc(USBHostDevice *s, USBPacket *p,
bool in, size_t bufsize)
{
USBHostRequest *r = g_new0(USBHostRequest, 1);
r->host = s;
r->p = p;
r->in = in;
r->xfer = libusb_alloc_transfer(0);
if (bufsize) {
r->buffer = g_malloc(bufsize);
}
QTAILQ_INSERT_TAIL(&s->requests, r, next);
#ifdef CONFIG_WIN32
request_count++;
usb_host_timer_kick();
#endif
return r;
}
static void usb_host_req_free(USBHostRequest *r)
{
#ifdef CONFIG_WIN32
request_count--;
#endif
QTAILQ_REMOVE(&r->host->requests, r, next);
libusb_free_transfer(r->xfer);
g_free(r->buffer);
g_free(r);
}
static USBHostRequest *usb_host_req_find(USBHostDevice *s, USBPacket *p)
{
USBHostRequest *r;
QTAILQ_FOREACH(r, &s->requests, next) {
if (r->p == p) {
return r;
}
}
return NULL;
}
static void LIBUSB_CALL usb_host_req_complete_ctrl(struct libusb_transfer *xfer)
{
USBHostRequest *r = xfer->user_data;
USBHostDevice *s = r->host;
bool disconnect = (xfer->status == LIBUSB_TRANSFER_NO_DEVICE);
if (r->p == NULL) {
goto out; /* request was canceled */
}
r->p->status = status_map[xfer->status];
r->p->actual_length = xfer->actual_length;
if (r->in && xfer->actual_length) {
USBDevice *udev = USB_DEVICE(s);
struct libusb_config_descriptor *conf = (void *)r->cbuf;
memcpy(r->cbuf, r->buffer + 8, xfer->actual_length);
/* Fix up USB-3 ep0 maxpacket size to allow superspeed connected devices
* to work redirected to a not superspeed capable hcd */
if (r->usb3ep0quirk && xfer->actual_length >= 18 &&
r->cbuf[7] == 9) {
r->cbuf[7] = 64;
}
/*
*If this is GET_DESCRIPTOR request for configuration descriptor,
* remove 'remote wakeup' flag from it to prevent idle power down
* in Windows guest
*/
if (s->suppress_remote_wake &&
udev->setup_buf[0] == USB_DIR_IN &&
udev->setup_buf[1] == USB_REQ_GET_DESCRIPTOR &&
udev->setup_buf[3] == USB_DT_CONFIG && udev->setup_buf[2] == 0 &&
xfer->actual_length >
offsetof(struct libusb_config_descriptor, bmAttributes) &&
(conf->bmAttributes & USB_CFG_ATT_WAKEUP)) {
trace_usb_host_remote_wakeup_removed(s->bus_num, s->addr);
conf->bmAttributes &= ~USB_CFG_ATT_WAKEUP;
}
}
trace_usb_host_req_complete(s->bus_num, s->addr, r->p,
r->p->status, r->p->actual_length);
usb_generic_async_ctrl_complete(USB_DEVICE(s), r->p);
out:
usb_host_req_free(r);
if (disconnect) {
usb_host_nodev(s);
}
}
static void LIBUSB_CALL usb_host_req_complete_data(struct libusb_transfer *xfer)
{
USBHostRequest *r = xfer->user_data;
USBHostDevice *s = r->host;
bool disconnect = (xfer->status == LIBUSB_TRANSFER_NO_DEVICE);
if (r->p == NULL) {
goto out; /* request was canceled */
}
r->p->status = status_map[xfer->status];
if (r->in && xfer->actual_length) {
usb_packet_copy(r->p, r->buffer, xfer->actual_length);
}
trace_usb_host_req_complete(s->bus_num, s->addr, r->p,
r->p->status, r->p->actual_length);
if (usb_host_use_combining(r->p->ep)) {
usb_combined_input_packet_complete(USB_DEVICE(s), r->p);
} else {
usb_packet_complete(USB_DEVICE(s), r->p);
}
out:
usb_host_req_free(r);
if (disconnect) {
usb_host_nodev(s);
}
}
static void usb_host_req_abort(USBHostRequest *r)
{
USBHostDevice *s = r->host;
bool inflight = (r->p && r->p->state == USB_PACKET_ASYNC);
if (inflight) {
r->p->status = USB_RET_NODEV;
trace_usb_host_req_complete(s->bus_num, s->addr, r->p,
r->p->status, r->p->actual_length);
if (r->p->ep->nr == 0) {
usb_generic_async_ctrl_complete(USB_DEVICE(s), r->p);
} else {
usb_packet_complete(USB_DEVICE(s), r->p);
}
r->p = NULL;
libusb_cancel_transfer(r->xfer);
}
}
/* ------------------------------------------------------------------------ */
static void LIBUSB_CALL
usb_host_req_complete_iso(struct libusb_transfer *transfer)
{
USBHostIsoXfer *xfer = transfer->user_data;
if (!xfer) {
/* USBHostIsoXfer released while inflight */
g_free(transfer->buffer);
libusb_free_transfer(transfer);
return;
}
QTAILQ_REMOVE(&xfer->ring->inflight, xfer, next);
if (QTAILQ_EMPTY(&xfer->ring->inflight)) {
USBHostDevice *s = xfer->ring->host;
trace_usb_host_iso_stop(s->bus_num, s->addr, xfer->ring->ep->nr);
}
if (xfer->ring->ep->pid == USB_TOKEN_IN) {
QTAILQ_INSERT_TAIL(&xfer->ring->copy, xfer, next);
usb_wakeup(xfer->ring->ep, 0);
} else {
QTAILQ_INSERT_TAIL(&xfer->ring->unused, xfer, next);
}
}
static USBHostIsoRing *usb_host_iso_alloc(USBHostDevice *s, USBEndpoint *ep)
{
USBHostIsoRing *ring = g_new0(USBHostIsoRing, 1);
USBHostIsoXfer *xfer;
/* FIXME: check interval (for now assume one xfer per frame) */
int packets = s->iso_urb_frames;
int i;
ring->host = s;
ring->ep = ep;
QTAILQ_INIT(&ring->unused);
QTAILQ_INIT(&ring->inflight);
QTAILQ_INIT(&ring->copy);
QTAILQ_INSERT_TAIL(&s->isorings, ring, next);
for (i = 0; i < s->iso_urb_count; i++) {
xfer = g_new0(USBHostIsoXfer, 1);
xfer->ring = ring;
xfer->xfer = libusb_alloc_transfer(packets);
xfer->xfer->dev_handle = s->dh;
xfer->xfer->type = LIBUSB_TRANSFER_TYPE_ISOCHRONOUS;
xfer->xfer->endpoint = ring->ep->nr;
if (ring->ep->pid == USB_TOKEN_IN) {
xfer->xfer->endpoint |= USB_DIR_IN;
}
xfer->xfer->callback = usb_host_req_complete_iso;
xfer->xfer->user_data = xfer;
xfer->xfer->num_iso_packets = packets;
xfer->xfer->length = ring->ep->max_packet_size * packets;
xfer->xfer->buffer = g_malloc0(xfer->xfer->length);
QTAILQ_INSERT_TAIL(&ring->unused, xfer, next);
}
return ring;
}
static USBHostIsoRing *usb_host_iso_find(USBHostDevice *s, USBEndpoint *ep)
{
USBHostIsoRing *ring;
QTAILQ_FOREACH(ring, &s->isorings, next) {
if (ring->ep == ep) {
return ring;
}
}
return NULL;
}
static void usb_host_iso_reset_xfer(USBHostIsoXfer *xfer)
{
libusb_set_iso_packet_lengths(xfer->xfer,
xfer->ring->ep->max_packet_size);
xfer->packet = 0;
xfer->copy_complete = false;
}
static void usb_host_iso_free_xfer(USBHostIsoXfer *xfer, bool inflight)
{
if (inflight) {
xfer->xfer->user_data = NULL;
} else {
g_free(xfer->xfer->buffer);
libusb_free_transfer(xfer->xfer);
}
g_free(xfer);
}
static void usb_host_iso_free(USBHostIsoRing *ring)
{
USBHostIsoXfer *xfer;
while ((xfer = QTAILQ_FIRST(&ring->inflight)) != NULL) {
QTAILQ_REMOVE(&ring->inflight, xfer, next);
usb_host_iso_free_xfer(xfer, true);
}
while ((xfer = QTAILQ_FIRST(&ring->unused)) != NULL) {
QTAILQ_REMOVE(&ring->unused, xfer, next);
usb_host_iso_free_xfer(xfer, false);
}
while ((xfer = QTAILQ_FIRST(&ring->copy)) != NULL) {
QTAILQ_REMOVE(&ring->copy, xfer, next);
usb_host_iso_free_xfer(xfer, false);
}
QTAILQ_REMOVE(&ring->host->isorings, ring, next);
g_free(ring);
}
static void usb_host_iso_free_all(USBHostDevice *s)
{
USBHostIsoRing *ring;
while ((ring = QTAILQ_FIRST(&s->isorings)) != NULL) {
usb_host_iso_free(ring);
}
}
static bool usb_host_iso_data_copy(USBHostIsoXfer *xfer, USBPacket *p)
{
unsigned int psize;
unsigned char *buf;
buf = libusb_get_iso_packet_buffer_simple(xfer->xfer, xfer->packet);
if (p->pid == USB_TOKEN_OUT) {
psize = p->iov.size;
if (psize > xfer->ring->ep->max_packet_size) {
/* should not happen (guest bug) */
psize = xfer->ring->ep->max_packet_size;
}
xfer->xfer->iso_packet_desc[xfer->packet].length = psize;
} else {
psize = xfer->xfer->iso_packet_desc[xfer->packet].actual_length;
if (psize > p->iov.size) {
/* should not happen (guest bug) */
psize = p->iov.size;
}
}
usb_packet_copy(p, buf, psize);
xfer->packet++;
xfer->copy_complete = (xfer->packet == xfer->xfer->num_iso_packets);
return xfer->copy_complete;
}
static void usb_host_iso_data_in(USBHostDevice *s, USBPacket *p)
{
USBHostIsoRing *ring;
USBHostIsoXfer *xfer;
bool disconnect = false;
int rc;
ring = usb_host_iso_find(s, p->ep);
if (ring == NULL) {
ring = usb_host_iso_alloc(s, p->ep);
}
/* copy data to guest */
xfer = QTAILQ_FIRST(&ring->copy);
if (xfer != NULL) {
if (usb_host_iso_data_copy(xfer, p)) {
QTAILQ_REMOVE(&ring->copy, xfer, next);
QTAILQ_INSERT_TAIL(&ring->unused, xfer, next);
}
}
/* submit empty bufs to host */
while ((xfer = QTAILQ_FIRST(&ring->unused)) != NULL) {
QTAILQ_REMOVE(&ring->unused, xfer, next);
usb_host_iso_reset_xfer(xfer);
rc = libusb_submit_transfer(xfer->xfer);
if (rc != 0) {
usb_host_libusb_error("libusb_submit_transfer [iso]", rc);
QTAILQ_INSERT_TAIL(&ring->unused, xfer, next);
if (rc == LIBUSB_ERROR_NO_DEVICE) {
disconnect = true;
}
break;
}
if (QTAILQ_EMPTY(&ring->inflight)) {
trace_usb_host_iso_start(s->bus_num, s->addr, p->ep->nr);
}
QTAILQ_INSERT_TAIL(&ring->inflight, xfer, next);
}
if (disconnect) {
usb_host_nodev(s);
}
}
static void usb_host_iso_data_out(USBHostDevice *s, USBPacket *p)
{
USBHostIsoRing *ring;
USBHostIsoXfer *xfer;
bool disconnect = false;
int rc, filled = 0;
ring = usb_host_iso_find(s, p->ep);
if (ring == NULL) {
ring = usb_host_iso_alloc(s, p->ep);
}
/* copy data from guest */
xfer = QTAILQ_FIRST(&ring->copy);
while (xfer != NULL && xfer->copy_complete) {
filled++;
xfer = QTAILQ_NEXT(xfer, next);
}
if (xfer == NULL) {
xfer = QTAILQ_FIRST(&ring->unused);
if (xfer == NULL) {
trace_usb_host_iso_out_of_bufs(s->bus_num, s->addr, p->ep->nr);
return;
}
QTAILQ_REMOVE(&ring->unused, xfer, next);
usb_host_iso_reset_xfer(xfer);
QTAILQ_INSERT_TAIL(&ring->copy, xfer, next);
}
usb_host_iso_data_copy(xfer, p);
if (QTAILQ_EMPTY(&ring->inflight)) {
/* wait until half of our buffers are filled
before kicking the iso out stream */
if (filled*2 < s->iso_urb_count) {
return;
}
}
/* submit filled bufs to host */
while ((xfer = QTAILQ_FIRST(&ring->copy)) != NULL &&
xfer->copy_complete) {
QTAILQ_REMOVE(&ring->copy, xfer, next);
rc = libusb_submit_transfer(xfer->xfer);
if (rc != 0) {
usb_host_libusb_error("libusb_submit_transfer [iso]", rc);
QTAILQ_INSERT_TAIL(&ring->unused, xfer, next);
if (rc == LIBUSB_ERROR_NO_DEVICE) {
disconnect = true;
}
break;
}
if (QTAILQ_EMPTY(&ring->inflight)) {
trace_usb_host_iso_start(s->bus_num, s->addr, p->ep->nr);
}
QTAILQ_INSERT_TAIL(&ring->inflight, xfer, next);
}
if (disconnect) {
usb_host_nodev(s);
}
}
/* ------------------------------------------------------------------------ */
static void usb_host_speed_compat(USBHostDevice *s)
{
USBDevice *udev = USB_DEVICE(s);
struct libusb_config_descriptor *conf;
const struct libusb_interface_descriptor *intf;
const struct libusb_endpoint_descriptor *endp;
#ifdef HAVE_STREAMS
struct libusb_ss_endpoint_companion_descriptor *endp_ss_comp;
#endif
bool compat_high = true;
bool compat_full = true;
uint8_t type;
int rc, c, i, a, e;
for (c = 0;; c++) {
rc = libusb_get_config_descriptor(s->dev, c, &conf);
if (rc != 0) {
break;
}
for (i = 0; i < conf->bNumInterfaces; i++) {
for (a = 0; a < conf->interface[i].num_altsetting; a++) {
intf = &conf->interface[i].altsetting[a];
if (intf->bInterfaceClass == LIBUSB_CLASS_MASS_STORAGE &&
intf->bInterfaceSubClass == 6) { /* SCSI */
udev->flags |= (1 << USB_DEV_FLAG_IS_SCSI_STORAGE);
break;
}
for (e = 0; e < intf->bNumEndpoints; e++) {
endp = &intf->endpoint[e];
type = endp->bmAttributes & 0x3;
switch (type) {
case 0x01: /* ISO */
compat_full = false;
compat_high = false;
break;
case 0x02: /* BULK */
#ifdef HAVE_STREAMS
rc = libusb_get_ss_endpoint_companion_descriptor
(ctx, endp, &endp_ss_comp);
if (rc == LIBUSB_SUCCESS) {
int streams = endp_ss_comp->bmAttributes & 0x1f;
if (streams) {
compat_full = false;
compat_high = false;
}
libusb_free_ss_endpoint_companion_descriptor
(endp_ss_comp);
}
#endif
break;
case 0x03: /* INTERRUPT */
if (endp->wMaxPacketSize > 64) {
compat_full = false;
}
if (endp->wMaxPacketSize > 1024) {
compat_high = false;
}
break;
}
}
}
}
libusb_free_config_descriptor(conf);
}
udev->speedmask = (1 << udev->speed);
if (udev->speed == USB_SPEED_SUPER && compat_high) {
udev->speedmask |= USB_SPEED_MASK_HIGH;
}
if (udev->speed == USB_SPEED_SUPER && compat_full) {
udev->speedmask |= USB_SPEED_MASK_FULL;
}
if (udev->speed == USB_SPEED_HIGH && compat_full) {
udev->speedmask |= USB_SPEED_MASK_FULL;
}
}
static void usb_host_ep_update(USBHostDevice *s)
{
static const char *tname[] = {
[USB_ENDPOINT_XFER_CONTROL] = "control",
[USB_ENDPOINT_XFER_ISOC] = "isoc",
[USB_ENDPOINT_XFER_BULK] = "bulk",
[USB_ENDPOINT_XFER_INT] = "int",
};
USBDevice *udev = USB_DEVICE(s);
struct libusb_config_descriptor *conf;
const struct libusb_interface_descriptor *intf;
const struct libusb_endpoint_descriptor *endp;
#ifdef HAVE_STREAMS
struct libusb_ss_endpoint_companion_descriptor *endp_ss_comp;
#endif
uint8_t devep, type;
int pid, ep, alt;
int rc, i, e;
usb_ep_reset(udev);
rc = libusb_get_active_config_descriptor(s->dev, &conf);
if (rc != 0) {
return;
}
trace_usb_host_parse_config(s->bus_num, s->addr,
conf->bConfigurationValue, true);
for (i = 0; i < conf->bNumInterfaces; i++) {
/*
* The udev->altsetting array indexes alternate settings
* by the interface number. Get the 0th alternate setting
* first so that we can grab the interface number, and
* then correct the alternate setting value if necessary.
*/
intf = &conf->interface[i].altsetting[0];
alt = udev->altsetting[intf->bInterfaceNumber];
if (alt != 0) {
assert(alt < conf->interface[i].num_altsetting);
intf = &conf->interface[i].altsetting[alt];
}
trace_usb_host_parse_interface(s->bus_num, s->addr,
intf->bInterfaceNumber,
intf->bAlternateSetting, true);
for (e = 0; e < intf->bNumEndpoints; e++) {
endp = &intf->endpoint[e];
devep = endp->bEndpointAddress;
pid = (devep & USB_DIR_IN) ? USB_TOKEN_IN : USB_TOKEN_OUT;
ep = devep & 0xf;
type = endp->bmAttributes & 0x3;
if (ep == 0) {
trace_usb_host_parse_error(s->bus_num, s->addr,
"invalid endpoint address");
return;
}
if (usb_ep_get_type(udev, pid, ep) != USB_ENDPOINT_XFER_INVALID) {
trace_usb_host_parse_error(s->bus_num, s->addr,
"duplicate endpoint address");
return;
}
trace_usb_host_parse_endpoint(s->bus_num, s->addr, ep,
(devep & USB_DIR_IN) ? "in" : "out",
tname[type], true);
usb_ep_set_max_packet_size(udev, pid, ep,
endp->wMaxPacketSize);
usb_ep_set_type(udev, pid, ep, type);
usb_ep_set_ifnum(udev, pid, ep, i);
usb_ep_set_halted(udev, pid, ep, 0);
#ifdef HAVE_STREAMS
if (type == LIBUSB_TRANSFER_TYPE_BULK &&
libusb_get_ss_endpoint_companion_descriptor(ctx, endp,
&endp_ss_comp) == LIBUSB_SUCCESS) {
usb_ep_set_max_streams(udev, pid, ep,
endp_ss_comp->bmAttributes);
libusb_free_ss_endpoint_companion_descriptor(endp_ss_comp);
}
#endif
}
}
libusb_free_config_descriptor(conf);
}
static int usb_host_open(USBHostDevice *s, libusb_device *dev, int hostfd)
{
USBDevice *udev = USB_DEVICE(s);
int libusb_speed;
int bus_num = 0;
int addr = 0;
int rc;
Error *local_err = NULL;
if (s->bh_postld_pending) {
return -1;
}
if (s->dh != NULL) {
goto fail;
}
if (dev) {
bus_num = libusb_get_bus_number(dev);
addr = libusb_get_device_address(dev);
trace_usb_host_open_started(bus_num, addr);
rc = libusb_open(dev, &s->dh);
if (rc != 0) {
goto fail;
}
} else {
#if LIBUSB_API_VERSION >= 0x01000107 && !defined(CONFIG_WIN32)
trace_usb_host_open_hostfd(hostfd);
rc = libusb_wrap_sys_device(ctx, hostfd, &s->dh);
if (rc != 0) {
goto fail;
}
s->hostfd = hostfd;
dev = libusb_get_device(s->dh);
bus_num = libusb_get_bus_number(dev);
addr = libusb_get_device_address(dev);
#else
g_assert_not_reached();
#endif
}
s->dev = dev;
s->bus_num = bus_num;
s->addr = addr;
usb_host_detach_kernel(s);
libusb_get_device_descriptor(dev, &s->ddesc);
usb_host_get_port(s->dev, s->port, sizeof(s->port));
usb_ep_init(udev);
usb_host_ep_update(s);
libusb_speed = libusb_get_device_speed(dev);
#if LIBUSB_API_VERSION >= 0x01000107 && defined(CONFIG_LINUX) && \
defined(USBDEVFS_GET_SPEED)
if (hostfd && libusb_speed == 0) {
/*
* Workaround libusb bug: libusb_get_device_speed() does not
* work for libusb_wrap_sys_device() devices in v1.0.23.
*
* Speeds are defined in linux/usb/ch9.h, file not included
* due to name conflicts.
*/
int rc = ioctl(hostfd, USBDEVFS_GET_SPEED, NULL);
switch (rc) {
case 1: /* low */
libusb_speed = LIBUSB_SPEED_LOW;
break;
case 2: /* full */
libusb_speed = LIBUSB_SPEED_FULL;
break;
case 3: /* high */
case 4: /* wireless */
libusb_speed = LIBUSB_SPEED_HIGH;
break;
case 5: /* super */
libusb_speed = LIBUSB_SPEED_SUPER;
break;
case 6: /* super plus */
#ifdef HAVE_SUPER_PLUS
libusb_speed = LIBUSB_SPEED_SUPER_PLUS;
#else
libusb_speed = LIBUSB_SPEED_SUPER;
#endif
break;
}
}
#endif
udev->speed = speed_map[libusb_speed];
usb_host_speed_compat(s);
if (s->ddesc.iProduct) {
libusb_get_string_descriptor_ascii(s->dh, s->ddesc.iProduct,
(unsigned char *)udev->product_desc,
sizeof(udev->product_desc));
} else {
snprintf(udev->product_desc, sizeof(udev->product_desc),
"host:%d.%d", bus_num, addr);
}
usb_device_attach(udev, &local_err);
if (local_err) {
error_report_err(local_err);
goto fail;
}
trace_usb_host_open_success(bus_num, addr);
return 0;
fail:
trace_usb_host_open_failure(bus_num, addr);
if (s->dh != NULL) {
usb_host_release_interfaces(s);
libusb_reset_device(s->dh);
usb_host_attach_kernel(s);
libusb_close(s->dh);
s->dh = NULL;
s->dev = NULL;
}
return -1;
}
static void usb_host_abort_xfers(USBHostDevice *s)
{
USBHostRequest *r, *rtmp;
int limit = 100;
QTAILQ_FOREACH_SAFE(r, &s->requests, next, rtmp) {
usb_host_req_abort(r);
}
while (QTAILQ_FIRST(&s->requests) != NULL) {
struct timeval tv;
memset(&tv, 0, sizeof(tv));
tv.tv_usec = 2500;
libusb_handle_events_timeout(ctx, &tv);
if (--limit == 0) {
/*
* Don't wait forever for libusb calling the complete
* callback (which will unlink and free the request).
*
* Leaking memory here, to make sure libusb will not
* access memory which we have released already.
*/
QTAILQ_FOREACH_SAFE(r, &s->requests, next, rtmp) {
QTAILQ_REMOVE(&s->requests, r, next);
}
return;
}
}
}
static int usb_host_close(USBHostDevice *s)
{
USBDevice *udev = USB_DEVICE(s);
if (s->dh == NULL) {
return -1;
}
trace_usb_host_close(s->bus_num, s->addr);
usb_host_abort_xfers(s);
usb_host_iso_free_all(s);
if (udev->attached) {
usb_device_detach(udev);
}
usb_host_release_interfaces(s);
libusb_reset_device(s->dh);
usb_host_attach_kernel(s);
libusb_close(s->dh);
s->dh = NULL;
s->dev = NULL;
if (s->hostfd != -1) {
close(s->hostfd);
s->hostfd = -1;
}
usb_host_auto_check(NULL);
return 0;
}
static void usb_host_nodev_bh(void *opaque)
{
USBHostDevice *s = opaque;
usb_host_close(s);
}
static void usb_host_nodev(USBHostDevice *s)
{
if (!s->bh_nodev) {
s->bh_nodev = qemu_bh_new(usb_host_nodev_bh, s);
}
qemu_bh_schedule(s->bh_nodev);
}
static void usb_host_exit_notifier(struct Notifier *n, void *data)
{
USBHostDevice *s = container_of(n, USBHostDevice, exit);
if (s->dh) {
usb_host_abort_xfers(s);
usb_host_release_interfaces(s);
libusb_reset_device(s->dh);
usb_host_attach_kernel(s);
libusb_close(s->dh);
}
}
static libusb_device *usb_host_find_ref(int bus, int addr)
{
libusb_device **devs = NULL;
libusb_device *ret = NULL;
int i, n;
n = libusb_get_device_list(ctx, &devs);
for (i = 0; i < n; i++) {
if (libusb_get_bus_number(devs[i]) == bus &&
libusb_get_device_address(devs[i]) == addr) {
ret = libusb_ref_device(devs[i]);
break;
}
}
libusb_free_device_list(devs, 1);
return ret;
}
static void usb_host_realize(USBDevice *udev, Error **errp)
{
USBHostDevice *s = USB_HOST_DEVICE(udev);
libusb_device *ldev;
int rc;
if (usb_host_init() != 0) {
error_setg(errp, "failed to init libusb");
return;
}
if (s->match.vendor_id > 0xffff) {
error_setg(errp, "vendorid out of range");
return;
}
if (s->match.product_id > 0xffff) {
error_setg(errp, "productid out of range");
return;
}
if (s->match.addr > 127) {
error_setg(errp, "hostaddr out of range");
return;
}
loglevel = s->loglevel;
udev->flags |= (1 << USB_DEV_FLAG_IS_HOST);
udev->auto_attach = 0;
QTAILQ_INIT(&s->requests);
QTAILQ_INIT(&s->isorings);
s->hostfd = -1;
#if LIBUSB_API_VERSION >= 0x01000107 && !defined(CONFIG_WIN32)
if (s->hostdevice) {
int fd;
s->needs_autoscan = false;
fd = qemu_open_old(s->hostdevice, O_RDWR);
if (fd < 0) {
error_setg_errno(errp, errno, "failed to open %s", s->hostdevice);
return;
}
rc = usb_host_open(s, NULL, fd);
if (rc < 0) {
error_setg(errp, "failed to open host usb device %s", s->hostdevice);
return;
}
} else
#endif
if (s->match.addr && s->match.bus_num &&
!s->match.vendor_id &&
!s->match.product_id &&
!s->match.port) {
s->needs_autoscan = false;
ldev = usb_host_find_ref(s->match.bus_num,
s->match.addr);
if (!ldev) {
error_setg(errp, "failed to find host usb device %d:%d",
s->match.bus_num, s->match.addr);
return;
}
rc = usb_host_open(s, ldev, 0);
libusb_unref_device(ldev);
if (rc < 0) {
error_setg(errp, "failed to open host usb device %d:%d",
s->match.bus_num, s->match.addr);
return;
}
} else {
s->needs_autoscan = true;
QTAILQ_INSERT_TAIL(&hostdevs, s, next);
usb_host_auto_check(NULL);
}
s->exit.notify = usb_host_exit_notifier;
qemu_add_exit_notifier(&s->exit);
}
static void usb_host_instance_init(Object *obj)
{
USBDevice *udev = USB_DEVICE(obj);
USBHostDevice *s = USB_HOST_DEVICE(udev);
device_add_bootindex_property(obj, &s->bootindex,
"bootindex", NULL,
&udev->qdev);
}
static void usb_host_unrealize(USBDevice *udev)
{
USBHostDevice *s = USB_HOST_DEVICE(udev);
qemu_remove_exit_notifier(&s->exit);
if (s->needs_autoscan) {
QTAILQ_REMOVE(&hostdevs, s, next);
}
usb_host_close(s);
}
static void usb_host_cancel_packet(USBDevice *udev, USBPacket *p)
{
USBHostDevice *s = USB_HOST_DEVICE(udev);
USBHostRequest *r;
if (p->combined) {
usb_combined_packet_cancel(udev, p);
return;
}
trace_usb_host_req_canceled(s->bus_num, s->addr, p);
r = usb_host_req_find(s, p);
if (r && r->p) {
r->p = NULL; /* mark as dead */
libusb_cancel_transfer(r->xfer);
}
}
static void usb_host_detach_kernel(USBHostDevice *s)
{
struct libusb_config_descriptor *conf;
int rc, i;
rc = libusb_get_active_config_descriptor(s->dev, &conf);
if (rc != 0) {
return;
}
for (i = 0; i < USB_MAX_INTERFACES; i++) {
rc = libusb_kernel_driver_active(s->dh, i);
usb_host_libusb_error("libusb_kernel_driver_active", rc);
if (rc != 1) {
if (rc == 0) {
s->ifs[i].detached = true;
}
continue;
}
trace_usb_host_detach_kernel(s->bus_num, s->addr, i);
rc = libusb_detach_kernel_driver(s->dh, i);
usb_host_libusb_error("libusb_detach_kernel_driver", rc);
s->ifs[i].detached = true;
}
libusb_free_config_descriptor(conf);
}
static void usb_host_attach_kernel(USBHostDevice *s)
{
struct libusb_config_descriptor *conf;
int rc, i;
rc = libusb_get_active_config_descriptor(s->dev, &conf);
if (rc != 0) {
return;
}
for (i = 0; i < USB_MAX_INTERFACES; i++) {
if (!s->ifs[i].detached) {
continue;
}
trace_usb_host_attach_kernel(s->bus_num, s->addr, i);
libusb_attach_kernel_driver(s->dh, i);
s->ifs[i].detached = false;
}
libusb_free_config_descriptor(conf);
}
static int usb_host_claim_interfaces(USBHostDevice *s, int configuration)
{
USBDevice *udev = USB_DEVICE(s);
struct libusb_config_descriptor *conf;
int rc, i, claimed;
for (i = 0; i < USB_MAX_INTERFACES; i++) {
udev->altsetting[i] = 0;
}
udev->ninterfaces = 0;
udev->configuration = 0;
usb_host_detach_kernel(s);
rc = libusb_get_active_config_descriptor(s->dev, &conf);
if (rc != 0) {
if (rc == LIBUSB_ERROR_NOT_FOUND) {
/* address state - ignore */
return USB_RET_SUCCESS;
}
return USB_RET_STALL;
}
claimed = 0;
for (i = 0; i < USB_MAX_INTERFACES; i++) {
trace_usb_host_claim_interface(s->bus_num, s->addr, configuration, i);
rc = libusb_claim_interface(s->dh, i);
if (rc == 0) {
s->ifs[i].claimed = true;
if (++claimed == conf->bNumInterfaces) {
break;
}
}
}
if (claimed != conf->bNumInterfaces) {
return USB_RET_STALL;
}
udev->ninterfaces = conf->bNumInterfaces;
udev->configuration = configuration;
libusb_free_config_descriptor(conf);
return USB_RET_SUCCESS;
}
static void usb_host_release_interfaces(USBHostDevice *s)
{
int i, rc;
for (i = 0; i < USB_MAX_INTERFACES; i++) {
if (!s->ifs[i].claimed) {
continue;
}
trace_usb_host_release_interface(s->bus_num, s->addr, i);
rc = libusb_release_interface(s->dh, i);
usb_host_libusb_error("libusb_release_interface", rc);
s->ifs[i].claimed = false;
}
}
static void usb_host_set_address(USBHostDevice *s, int addr)
{
USBDevice *udev = USB_DEVICE(s);
trace_usb_host_set_address(s->bus_num, s->addr, addr);
udev->addr = addr;
}
static void usb_host_set_config(USBHostDevice *s, int config, USBPacket *p)
{
int rc = 0;
trace_usb_host_set_config(s->bus_num, s->addr, config);
usb_host_release_interfaces(s);
if (s->ddesc.bNumConfigurations != 1) {
rc = libusb_set_configuration(s->dh, config);
if (rc != 0) {
usb_host_libusb_error("libusb_set_configuration", rc);
p->status = USB_RET_STALL;
if (rc == LIBUSB_ERROR_NO_DEVICE) {
usb_host_nodev(s);
}
return;
}
}
p->status = usb_host_claim_interfaces(s, config);
if (p->status != USB_RET_SUCCESS) {
return;
}
usb_host_ep_update(s);
}
static void usb_host_set_interface(USBHostDevice *s, int iface, int alt,
USBPacket *p)
{
USBDevice *udev = USB_DEVICE(s);
int rc;
trace_usb_host_set_interface(s->bus_num, s->addr, iface, alt);
usb_host_iso_free_all(s);
if (iface >= USB_MAX_INTERFACES) {
p->status = USB_RET_STALL;
return;
}
rc = libusb_set_interface_alt_setting(s->dh, iface, alt);
if (rc != 0) {
usb_host_libusb_error("libusb_set_interface_alt_setting", rc);
p->status = USB_RET_STALL;
if (rc == LIBUSB_ERROR_NO_DEVICE) {
usb_host_nodev(s);
}
return;
}
udev->altsetting[iface] = alt;
usb_host_ep_update(s);
}
static void usb_host_handle_control(USBDevice *udev, USBPacket *p,
int request, int value, int index,
int length, uint8_t *data)
{
USBHostDevice *s = USB_HOST_DEVICE(udev);
USBHostRequest *r;
int rc;
trace_usb_host_req_control(s->bus_num, s->addr, p, request, value, index);
if (s->dh == NULL) {
p->status = USB_RET_NODEV;
trace_usb_host_req_emulated(s->bus_num, s->addr, p, p->status);
return;
}
switch (request) {
case DeviceOutRequest | USB_REQ_SET_ADDRESS:
usb_host_set_address(s, value);
trace_usb_host_req_emulated(s->bus_num, s->addr, p, p->status);
return;
case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
usb_host_set_config(s, value & 0xff, p);
trace_usb_host_req_emulated(s->bus_num, s->addr, p, p->status);
return;
case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
usb_host_set_interface(s, index, value, p);
trace_usb_host_req_emulated(s->bus_num, s->addr, p, p->status);
return;
case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
if (value == 0) { /* clear halt */
int pid = (index & USB_DIR_IN) ? USB_TOKEN_IN : USB_TOKEN_OUT;
libusb_clear_halt(s->dh, index);
usb_ep_set_halted(udev, pid, index & 0x0f, 0);
trace_usb_host_req_emulated(s->bus_num, s->addr, p, p->status);
return;
}
}
r = usb_host_req_alloc(s, p, (request >> 8) & USB_DIR_IN, length + 8);
r->cbuf = data;
r->clen = length;
memcpy(r->buffer, udev->setup_buf, 8);
if (!r->in) {
memcpy(r->buffer + 8, r->cbuf, r->clen);
}
/* Fix up USB-3 ep0 maxpacket size to allow superspeed connected devices
* to work redirected to a not superspeed capable hcd */
if ((udev->speedmask & USB_SPEED_MASK_SUPER) &&
!(udev->port->speedmask & USB_SPEED_MASK_SUPER) &&
request == 0x8006 && value == 0x100 && index == 0) {
r->usb3ep0quirk = true;
}
libusb_fill_control_transfer(r->xfer, s->dh, r->buffer,
usb_host_req_complete_ctrl, r,
CONTROL_TIMEOUT);
rc = libusb_submit_transfer(r->xfer);
if (rc != 0) {
p->status = USB_RET_NODEV;
trace_usb_host_req_complete(s->bus_num, s->addr, p,
p->status, p->actual_length);
if (rc == LIBUSB_ERROR_NO_DEVICE) {
usb_host_nodev(s);
}
return;
}
p->status = USB_RET_ASYNC;
}
static void usb_host_handle_data(USBDevice *udev, USBPacket *p)
{
USBHostDevice *s = USB_HOST_DEVICE(udev);
USBHostRequest *r;
size_t size;
int ep, rc;
if (usb_host_use_combining(p->ep) && p->state == USB_PACKET_SETUP) {
p->status = USB_RET_ADD_TO_QUEUE;
return;
}
trace_usb_host_req_data(s->bus_num, s->addr, p,
p->pid == USB_TOKEN_IN,
p->ep->nr, p->iov.size);
if (s->dh == NULL) {
p->status = USB_RET_NODEV;
trace_usb_host_req_emulated(s->bus_num, s->addr, p, p->status);
return;
}
if (p->ep->halted) {
p->status = USB_RET_STALL;
trace_usb_host_req_emulated(s->bus_num, s->addr, p, p->status);
return;
}
switch (usb_ep_get_type(udev, p->pid, p->ep->nr)) {
case USB_ENDPOINT_XFER_BULK:
size = usb_packet_size(p);
r = usb_host_req_alloc(s, p, p->pid == USB_TOKEN_IN, size);
if (!r->in) {
usb_packet_copy(p, r->buffer, size);
}
ep = p->ep->nr | (r->in ? USB_DIR_IN : 0);
if (p->stream) {
#ifdef HAVE_STREAMS
libusb_fill_bulk_stream_transfer(r->xfer, s->dh, ep, p->stream,
r->buffer, size,
usb_host_req_complete_data, r,
BULK_TIMEOUT);
#else
usb_host_req_free(r);
p->status = USB_RET_STALL;
return;
#endif
} else {
libusb_fill_bulk_transfer(r->xfer, s->dh, ep,
r->buffer, size,
usb_host_req_complete_data, r,
BULK_TIMEOUT);
}
break;
case USB_ENDPOINT_XFER_INT:
r = usb_host_req_alloc(s, p, p->pid == USB_TOKEN_IN, p->iov.size);
if (!r->in) {
usb_packet_copy(p, r->buffer, p->iov.size);
}
ep = p->ep->nr | (r->in ? USB_DIR_IN : 0);
libusb_fill_interrupt_transfer(r->xfer, s->dh, ep,
r->buffer, p->iov.size,
usb_host_req_complete_data, r,
INTR_TIMEOUT);
break;
case USB_ENDPOINT_XFER_ISOC:
if (p->pid == USB_TOKEN_IN) {
usb_host_iso_data_in(s, p);
} else {
usb_host_iso_data_out(s, p);
}
trace_usb_host_req_complete(s->bus_num, s->addr, p,
p->status, p->actual_length);
return;
default:
p->status = USB_RET_STALL;
trace_usb_host_req_complete(s->bus_num, s->addr, p,
p->status, p->actual_length);
return;
}
rc = libusb_submit_transfer(r->xfer);
if (rc != 0) {
p->status = USB_RET_NODEV;
trace_usb_host_req_complete(s->bus_num, s->addr, p,
p->status, p->actual_length);
if (rc == LIBUSB_ERROR_NO_DEVICE) {
usb_host_nodev(s);
}
return;
}
p->status = USB_RET_ASYNC;
}
static void usb_host_flush_ep_queue(USBDevice *dev, USBEndpoint *ep)
{
if (usb_host_use_combining(ep)) {
usb_ep_combine_input_packets(ep);
}
}
static void usb_host_handle_reset(USBDevice *udev)
{
USBHostDevice *s = USB_HOST_DEVICE(udev);
int rc;
if (!s->allow_one_guest_reset && !s->allow_all_guest_resets) {
return;
}
if (!s->allow_all_guest_resets && udev->addr == 0) {
return;
}
trace_usb_host_reset(s->bus_num, s->addr);
rc = libusb_reset_device(s->dh);
if (rc != 0) {
usb_host_nodev(s);
}
}
static int usb_host_alloc_streams(USBDevice *udev, USBEndpoint **eps,
int nr_eps, int streams)
{
#ifdef HAVE_STREAMS
USBHostDevice *s = USB_HOST_DEVICE(udev);
unsigned char endpoints[30];
int i, rc;
for (i = 0; i < nr_eps; i++) {
endpoints[i] = eps[i]->nr;
if (eps[i]->pid == USB_TOKEN_IN) {
endpoints[i] |= 0x80;
}
}
rc = libusb_alloc_streams(s->dh, streams, endpoints, nr_eps);
if (rc < 0) {
usb_host_libusb_error("libusb_alloc_streams", rc);
} else if (rc != streams) {
error_report("libusb_alloc_streams: got less streams "
"then requested %d < %d", rc, streams);
}
return (rc == streams) ? 0 : -1;
#else
error_report("libusb_alloc_streams: error not implemented");
return -1;
#endif
}
static void usb_host_free_streams(USBDevice *udev, USBEndpoint **eps,
int nr_eps)
{
#ifdef HAVE_STREAMS
USBHostDevice *s = USB_HOST_DEVICE(udev);
unsigned char endpoints[30];
int i;
for (i = 0; i < nr_eps; i++) {
endpoints[i] = eps[i]->nr;
if (eps[i]->pid == USB_TOKEN_IN) {
endpoints[i] |= 0x80;
}
}
libusb_free_streams(s->dh, endpoints, nr_eps);
#endif
}
/*
* This is *NOT* about restoring state. We have absolutely no idea
* what state the host device is in at the moment and whenever it is
* still present in the first place. Attempting to continue where we
* left off is impossible.
*
* What we are going to do here is emulate a surprise removal of
* the usb device passed through, then kick host scan so the device
* will get re-attached (and re-initialized by the guest) in case it
* is still present.
*
* As the device removal will change the state of other devices (usb
* host controller, most likely interrupt controller too) we have to
* wait with it until *all* vmstate is loaded. Thus post_load just
* kicks a bottom half which then does the actual work.
*/
static void usb_host_post_load_bh(void *opaque)
{
USBHostDevice *dev = opaque;
USBDevice *udev = USB_DEVICE(dev);
if (dev->dh != NULL) {
usb_host_close(dev);
}
if (udev->attached) {
usb_device_detach(udev);
}
dev->bh_postld_pending = false;
usb_host_auto_check(NULL);
}
static int usb_host_post_load(void *opaque, int version_id)
{
USBHostDevice *dev = opaque;
if (!dev->bh_postld) {
dev->bh_postld = qemu_bh_new(usb_host_post_load_bh, dev);
}
qemu_bh_schedule(dev->bh_postld);
dev->bh_postld_pending = true;
return 0;
}
static const VMStateDescription vmstate_usb_host = {
.name = "usb-host",
.version_id = 1,
.minimum_version_id = 1,
.post_load = usb_host_post_load,
.fields = (VMStateField[]) {
VMSTATE_USB_DEVICE(parent_obj, USBHostDevice),
VMSTATE_END_OF_LIST()
}
};
static Property usb_host_dev_properties[] = {
DEFINE_PROP_UINT32("hostbus", USBHostDevice, match.bus_num, 0),
DEFINE_PROP_UINT32("hostaddr", USBHostDevice, match.addr, 0),
DEFINE_PROP_STRING("hostport", USBHostDevice, match.port),
DEFINE_PROP_UINT32("vendorid", USBHostDevice, match.vendor_id, 0),
DEFINE_PROP_UINT32("productid", USBHostDevice, match.product_id, 0),
#if LIBUSB_API_VERSION >= 0x01000107
DEFINE_PROP_STRING("hostdevice", USBHostDevice, hostdevice),
#endif
DEFINE_PROP_UINT32("isobufs", USBHostDevice, iso_urb_count, 4),
DEFINE_PROP_UINT32("isobsize", USBHostDevice, iso_urb_frames, 32),
DEFINE_PROP_BOOL("guest-reset", USBHostDevice,
allow_one_guest_reset, true),
DEFINE_PROP_BOOL("guest-resets-all", USBHostDevice,
allow_all_guest_resets, false),
DEFINE_PROP_UINT32("loglevel", USBHostDevice, loglevel,
LIBUSB_LOG_LEVEL_WARNING),
DEFINE_PROP_BIT("pipeline", USBHostDevice, options,
USB_HOST_OPT_PIPELINE, true),
DEFINE_PROP_BOOL("suppress-remote-wake", USBHostDevice,
suppress_remote_wake, true),
DEFINE_PROP_END_OF_LIST(),
};
static void usb_host_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
uc->realize = usb_host_realize;
uc->product_desc = "USB Host Device";
uc->cancel_packet = usb_host_cancel_packet;
uc->handle_data = usb_host_handle_data;
uc->handle_control = usb_host_handle_control;
uc->handle_reset = usb_host_handle_reset;
uc->unrealize = usb_host_unrealize;
uc->flush_ep_queue = usb_host_flush_ep_queue;
uc->alloc_streams = usb_host_alloc_streams;
uc->free_streams = usb_host_free_streams;
dc->vmsd = &vmstate_usb_host;
device_class_set_props(dc, usb_host_dev_properties);
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
}
static const TypeInfo usb_host_dev_info = {
.name = TYPE_USB_HOST_DEVICE,
.parent = TYPE_USB_DEVICE,
.instance_size = sizeof(USBHostDevice),
.class_init = usb_host_class_initfn,
.instance_init = usb_host_instance_init,
};
module_obj(TYPE_USB_HOST_DEVICE);
module_kconfig(USB);
static void usb_host_register_types(void)
{
type_register_static(&usb_host_dev_info);
monitor_register_hmp("usbhost", true, hmp_info_usbhost);
}
type_init(usb_host_register_types)
/* ------------------------------------------------------------------------ */
static QEMUTimer *usb_auto_timer;
static VMChangeStateEntry *usb_vmstate;
static void usb_host_vm_state(void *unused, bool running, RunState state)
{
if (running) {
usb_host_auto_check(unused);
}
}
static void usb_host_auto_check(void *unused)
{
struct USBHostDevice *s;
struct USBAutoFilter *f;
libusb_device **devs = NULL;
struct libusb_device_descriptor ddesc;
int i, n;
if (usb_host_init() != 0) {
return;
}
if (runstate_is_running()) {
n = libusb_get_device_list(ctx, &devs);
for (i = 0; i < n; i++) {
if (libusb_get_device_descriptor(devs[i], &ddesc) != 0) {
continue;
}
if (ddesc.bDeviceClass == LIBUSB_CLASS_HUB) {
continue;
}
QTAILQ_FOREACH(s, &hostdevs, next) {
f = &s->match;
if (f->bus_num > 0 &&
f->bus_num != libusb_get_bus_number(devs[i])) {
continue;
}
if (f->addr > 0 &&
f->addr != libusb_get_device_address(devs[i])) {
continue;
}
if (f->port != NULL) {
char port[16] = "-";
usb_host_get_port(devs[i], port, sizeof(port));
if (strcmp(f->port, port) != 0) {
continue;
}
}
if (f->vendor_id > 0 &&
f->vendor_id != ddesc.idVendor) {
continue;
}
if (f->product_id > 0 &&
f->product_id != ddesc.idProduct) {
continue;
}
/* We got a match */
s->seen++;
if (s->errcount >= 3) {
continue;
}
if (s->dh != NULL) {
continue;
}
if (usb_host_open(s, devs[i], 0) < 0) {
s->errcount++;
continue;
}
break;
}
}
libusb_free_device_list(devs, 1);
QTAILQ_FOREACH(s, &hostdevs, next) {
if (s->seen == 0) {
if (s->dh) {
usb_host_close(s);
}
s->errcount = 0;
}
s->seen = 0;
}
}
if (!usb_vmstate) {
usb_vmstate = qemu_add_vm_change_state_handler(usb_host_vm_state, NULL);
}
if (!usb_auto_timer) {
usb_auto_timer = timer_new_ms(QEMU_CLOCK_REALTIME, usb_host_auto_check, NULL);
if (!usb_auto_timer) {
return;
}
trace_usb_host_auto_scan_enabled();
}
timer_mod(usb_auto_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 2000);
}
void hmp_info_usbhost(Monitor *mon, const QDict *qdict)
{
libusb_device **devs = NULL;
struct libusb_device_descriptor ddesc;
char port[16];
int i, n;
if (usb_host_init() != 0) {
return;
}
n = libusb_get_device_list(ctx, &devs);
for (i = 0; i < n; i++) {
if (libusb_get_device_descriptor(devs[i], &ddesc) != 0) {
continue;
}
if (ddesc.bDeviceClass == LIBUSB_CLASS_HUB) {
continue;
}
usb_host_get_port(devs[i], port, sizeof(port));
monitor_printf(mon, " Bus %d, Addr %d, Port %s, Speed %s Mb/s\n",
libusb_get_bus_number(devs[i]),
libusb_get_device_address(devs[i]),
port,
speed_name[libusb_get_device_speed(devs[i])]);
monitor_printf(mon, " Class %02x:", ddesc.bDeviceClass);
monitor_printf(mon, " USB device %04x:%04x",
ddesc.idVendor, ddesc.idProduct);
if (ddesc.iProduct) {
libusb_device_handle *handle;
if (libusb_open(devs[i], &handle) == 0) {
unsigned char name[64] = "";
libusb_get_string_descriptor_ascii(handle,
ddesc.iProduct,
name, sizeof(name));
libusb_close(handle);
monitor_printf(mon, ", %s", name);
}
}
monitor_printf(mon, "\n");
}
libusb_free_device_list(devs, 1);
}
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