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qemu-e2k/hw/usb/host-libusb.c
Hans de Goede f34d5c7508 usb-host-libusb: Detach kernel drivers earlier 
If we detach the kernel drivers on the first set_config, then they will
be still attached when the device gets its initial reset. Causing the drivers
to re-initialize the device after the reset, dirtying the device state.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2013-10-22 16:28:49 +02:00

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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 <poll.h>
#include <libusb.h>
#include "qemu-common.h"
#include "monitor/monitor.h"
#include "sysemu/sysemu.h"
#include "trace.h"
#include "hw/usb.h"
/* ------------------------------------------------------------------------ */
#define TYPE_USB_HOST_DEVICE "usb-host"
#define USB_HOST_DEVICE(obj) \
OBJECT_CHECK(USBHostDevice, (obj), TYPE_USB_HOST_DEVICE)
typedef struct USBHostDevice USBHostDevice;
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;
int32_t bootindex;
uint32_t iso_urb_count;
uint32_t iso_urb_frames;
uint32_t options;
uint32_t loglevel;
/* state */
QTAILQ_ENTRY(USBHostDevice) next;
int seen, errcount;
int bus_num;
int addr;
char port[16];
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;
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;
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);
/* ------------------------------------------------------------------------ */
#define CONTROL_TIMEOUT 10000 /* 10 sec */
#define BULK_TIMEOUT 0 /* unlimited */
#define INTR_TIMEOUT 0 /* unlimited */
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",
};
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,
};
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;
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);
}
static int usb_host_init(void)
{
const struct libusb_pollfd **poll;
int i, rc;
if (ctx) {
return 0;
}
rc = libusb_init(&ctx);
if (rc != 0) {
return -1;
}
libusb_set_debug(ctx, loglevel);
libusb_set_pollfd_notifiers(ctx, usb_host_add_fd,
usb_host_del_fd,
ctx);
poll = libusb_get_pollfds(ctx);
if (poll) {
for (i = 0; poll[i] != NULL; i++) {
usb_host_add_fd(poll[i]->fd, poll[i]->events, ctx);
}
}
free(poll);
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 LIBUSBX_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 = "?";
}
fprintf(stderr, "%s: %d [%s]\n", 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);
return r;
}
static void usb_host_req_free(USBHostRequest *r)
{
if (r->host) {
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 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) {
memcpy(r->cbuf, r->buffer + 8, xfer->actual_length);
}
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 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;
}
QTAILQ_REMOVE(&r->host->requests, r, next);
r->host = NULL;
if (inflight) {
libusb_cancel_transfer(r->xfer);
}
}
/* ------------------------------------------------------------------------ */
static void 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);
} 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 bool usb_host_full_speed_compat(USBHostDevice *s)
{
struct libusb_config_descriptor *conf;
const struct libusb_interface_descriptor *intf;
const struct libusb_endpoint_descriptor *endp;
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];
for (e = 0; e < intf->bNumEndpoints; e++) {
endp = &intf->endpoint[e];
type = endp->bmAttributes & 0x3;
switch (type) {
case 0x01: /* ISO */
return false;
case 0x03: /* INTERRUPT */
if (endp->wMaxPacketSize > 64) {
return false;
}
break;
}
}
}
}
libusb_free_config_descriptor(conf);
}
return true;
}
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;
uint8_t devep, type;
int pid, ep;
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++) {
assert(udev->altsetting[i] < conf->interface[i].num_altsetting);
intf = &conf->interface[i].altsetting[udev->altsetting[i]];
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);
}
}
libusb_free_config_descriptor(conf);
}
static int usb_host_open(USBHostDevice *s, libusb_device *dev)
{
USBDevice *udev = USB_DEVICE(s);
int bus_num = libusb_get_bus_number(dev);
int addr = libusb_get_device_address(dev);
int rc;
trace_usb_host_open_started(bus_num, addr);
if (s->dh != NULL) {
goto fail;
}
rc = libusb_open(dev, &s->dh);
if (rc != 0) {
goto fail;
}
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);
udev->speed = speed_map[libusb_get_device_speed(dev)];
udev->speedmask = (1 << udev->speed);
if (udev->speed == USB_SPEED_HIGH && usb_host_full_speed_compat(s)) {
udev->speedmask |= USB_SPEED_MASK_FULL;
}
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);
}
rc = usb_device_attach(udev);
if (rc) {
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) {
libusb_close(s->dh);
s->dh = NULL;
s->dev = NULL;
}
return -1;
}
static void usb_host_abort_xfers(USBHostDevice *s)
{
USBHostRequest *r, *rtmp;
QTAILQ_FOREACH_SAFE(r, &s->requests, next, rtmp) {
usb_host_req_abort(r);
}
}
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;
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_release_interfaces(s);
usb_host_attach_kernel(s);
}
}
static int usb_host_initfn(USBDevice *udev)
{
USBHostDevice *s = USB_HOST_DEVICE(udev);
loglevel = s->loglevel;
udev->flags |= (1 << USB_DEV_FLAG_IS_HOST);
udev->auto_attach = 0;
QTAILQ_INIT(&s->requests);
QTAILQ_INIT(&s->isorings);
s->exit.notify = usb_host_exit_notifier;
qemu_add_exit_notifier(&s->exit);
QTAILQ_INSERT_TAIL(&hostdevs, s, next);
add_boot_device_path(s->bootindex, &udev->qdev, NULL);
usb_host_auto_check(NULL);
return 0;
}
static void usb_host_handle_destroy(USBDevice *udev)
{
USBHostDevice *s = USB_HOST_DEVICE(udev);
qemu_remove_exit_notifier(&s->exit);
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 < conf->bNumInterfaces; i++) {
rc = libusb_kernel_driver_active(s->dh, i);
usb_host_libusb_error("libusb_kernel_driver_active", rc);
if (rc != 1) {
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 < conf->bNumInterfaces; 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;
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;
}
for (i = 0; i < conf->bNumInterfaces; i++) {
trace_usb_host_claim_interface(s->bus_num, s->addr, configuration, i);
rc = libusb_claim_interface(s->dh, i);
usb_host_libusb_error("libusb_claim_interface", rc);
if (rc != 0) {
return USB_RET_STALL;
}
s->ifs[i].claimed = true;
}
udev->ninterfaces = conf->bNumInterfaces;
udev->configuration = configuration;
libusb_free_config_descriptor(conf);
return USB_RET_SUCCESS;
}
static void usb_host_release_interfaces(USBHostDevice *s)
{
USBDevice *udev = USB_DEVICE(s);
int i, rc;
for (i = 0; i < udev->ninterfaces; 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;
trace_usb_host_set_config(s->bus_num, s->addr, config);
usb_host_release_interfaces(s);
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);
}
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);
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;
trace_usb_host_reset(s->bus_num, s->addr);
rc = libusb_reset_device(s->dh);
if (rc != 0) {
usb_host_nodev(s);
}
}
/*
* 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. Attemping to contine where we
* left off is impossible.
*
* What we are going to to to 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);
}
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);
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_HEX32("vendorid", USBHostDevice, match.vendor_id, 0),
DEFINE_PROP_HEX32("productid", USBHostDevice, match.product_id, 0),
DEFINE_PROP_UINT32("isobufs", USBHostDevice, iso_urb_count, 4),
DEFINE_PROP_UINT32("isobsize", USBHostDevice, iso_urb_frames, 32),
DEFINE_PROP_INT32("bootindex", USBHostDevice, bootindex, -1),
DEFINE_PROP_UINT32("loglevel", USBHostDevice, loglevel,
LIBUSB_LOG_LEVEL_WARNING),
DEFINE_PROP_BIT("pipeline", USBHostDevice, options,
USB_HOST_OPT_PIPELINE, 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->init = usb_host_initfn;
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->handle_destroy = usb_host_handle_destroy;
uc->flush_ep_queue = usb_host_flush_ep_queue;
dc->vmsd = &vmstate_usb_host;
dc->props = usb_host_dev_properties;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
}
static TypeInfo usb_host_dev_info = {
.name = TYPE_USB_HOST_DEVICE,
.parent = TYPE_USB_DEVICE,
.instance_size = sizeof(USBHostDevice),
.class_init = usb_host_class_initfn,
};
static void usb_host_register_types(void)
{
type_register_static(&usb_host_dev_info);
}
type_init(usb_host_register_types)
/* ------------------------------------------------------------------------ */
static QEMUTimer *usb_auto_timer;
static VMChangeStateEntry *usb_vmstate;
static void usb_host_vm_state(void *unused, int 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;
struct libusb_device_descriptor ddesc;
int unconnected = 0;
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) {
s->errcount++;
continue;
}
break;
}
}
libusb_free_device_list(devs, 1);
QTAILQ_FOREACH(s, &hostdevs, next) {
if (s->dh == NULL) {
unconnected++;
}
if (s->seen == 0) {
if (s->dh) {
usb_host_close(s);
}
s->errcount = 0;
}
s->seen = 0;
}
#if 0
if (unconnected == 0) {
/* nothing to watch */
if (usb_auto_timer) {
timer_del(usb_auto_timer);
trace_usb_host_auto_scan_disabled();
}
return;
}
#endif
}
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 usb_host_info(Monitor *mon, const QDict *qdict)
{
libusb_device **devs;
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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