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usb: add hostdevice property to usb-host
The new property allows to specify usb host device name. Uses standard qemu_open(), so both file system path (/dev/bus/usb/$bus/$dev on linux) and file descriptor passing can be used. Requires libusb 1.0.23 or newer. The hostdevice property is only present in case qemu is compiled against a new enough library version, so the presence of the property can be used for feature detection. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-Id: <20200605125952.13113-1-kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann
parent
5c24bce305
commit
9f815e83e9
@ -80,6 +80,7 @@ struct USBHostDevice {
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/* properties */
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struct USBAutoFilter match;
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char *hostdevice;
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int32_t bootindex;
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uint32_t iso_urb_count;
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uint32_t iso_urb_frames;
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@ -97,6 +98,7 @@ struct USBHostDevice {
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int addr;
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char port[16];
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int hostfd;
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libusb_device *dev;
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libusb_device_handle *dh;
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struct libusb_device_descriptor ddesc;
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@ -880,26 +882,45 @@ static void usb_host_ep_update(USBHostDevice *s)
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libusb_free_config_descriptor(conf);
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}
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static int usb_host_open(USBHostDevice *s, libusb_device *dev)
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static int usb_host_open(USBHostDevice *s, libusb_device *dev, int hostfd)
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{
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USBDevice *udev = USB_DEVICE(s);
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int bus_num = libusb_get_bus_number(dev);
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int addr = libusb_get_device_address(dev);
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int bus_num = 0;
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int addr = 0;
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int rc;
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Error *local_err = NULL;
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if (s->bh_postld_pending) {
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return -1;
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}
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trace_usb_host_open_started(bus_num, addr);
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if (s->dh != NULL) {
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goto fail;
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}
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rc = libusb_open(dev, &s->dh);
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if (rc != 0) {
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goto fail;
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if (dev) {
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bus_num = libusb_get_bus_number(dev);
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addr = libusb_get_device_address(dev);
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trace_usb_host_open_started(bus_num, addr);
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rc = libusb_open(dev, &s->dh);
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if (rc != 0) {
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goto fail;
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}
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} else {
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#if LIBUSB_API_VERSION >= 0x01000107
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trace_usb_host_open_hostfd(hostfd);
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rc = libusb_wrap_sys_device(ctx, hostfd, &s->dh);
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if (rc != 0) {
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goto fail;
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}
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s->hostfd = hostfd;
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dev = libusb_get_device(s->dh);
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bus_num = libusb_get_bus_number(dev);
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addr = libusb_get_device_address(dev);
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#else
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g_assert_not_reached();
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#endif
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}
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s->dev = dev;
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@ -988,6 +1009,11 @@ static int usb_host_close(USBHostDevice *s)
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s->dh = NULL;
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s->dev = NULL;
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if (s->hostfd != -1) {
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close(s->hostfd);
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s->hostfd = -1;
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}
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usb_host_auto_check(NULL);
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return 0;
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}
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@ -1025,9 +1051,6 @@ static libusb_device *usb_host_find_ref(int bus, int addr)
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libusb_device *ret = NULL;
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int i, n;
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if (usb_host_init() != 0) {
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return NULL;
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}
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n = libusb_get_device_list(ctx, &devs);
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for (i = 0; i < n; i++) {
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if (libusb_get_bus_number(devs[i]) == bus &&
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@ -1046,6 +1069,10 @@ static void usb_host_realize(USBDevice *udev, Error **errp)
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libusb_device *ldev;
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int rc;
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if (usb_host_init() != 0) {
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error_setg(errp, "failed to init libusb");
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return;
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}
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if (s->match.vendor_id > 0xffff) {
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error_setg(errp, "vendorid out of range");
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return;
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@ -1064,7 +1091,24 @@ static void usb_host_realize(USBDevice *udev, Error **errp)
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udev->auto_attach = 0;
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QTAILQ_INIT(&s->requests);
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QTAILQ_INIT(&s->isorings);
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s->hostfd = -1;
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#if LIBUSB_API_VERSION >= 0x01000107
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if (s->hostdevice) {
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int fd;
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s->needs_autoscan = false;
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fd = qemu_open(s->hostdevice, O_RDWR);
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if (fd < 0) {
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error_setg_errno(errp, errno, "failed to open %s", s->hostdevice);
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return;
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}
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rc = usb_host_open(s, NULL, fd);
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if (rc < 0) {
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error_setg(errp, "failed to open host usb device %s", s->hostdevice);
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return;
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}
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} else
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#endif
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if (s->match.addr && s->match.bus_num &&
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!s->match.vendor_id &&
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!s->match.product_id &&
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@ -1077,7 +1121,7 @@ static void usb_host_realize(USBDevice *udev, Error **errp)
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s->match.bus_num, s->match.addr);
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return;
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}
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rc = usb_host_open(s, ldev);
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rc = usb_host_open(s, ldev, 0);
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libusb_unref_device(ldev);
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if (rc < 0) {
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error_setg(errp, "failed to open host usb device %d:%d",
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@ -1605,6 +1649,9 @@ static Property usb_host_dev_properties[] = {
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DEFINE_PROP_STRING("hostport", USBHostDevice, match.port),
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DEFINE_PROP_UINT32("vendorid", USBHostDevice, match.vendor_id, 0),
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DEFINE_PROP_UINT32("productid", USBHostDevice, match.product_id, 0),
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#if LIBUSB_API_VERSION >= 0x01000107
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DEFINE_PROP_STRING("hostdevice", USBHostDevice, hostdevice),
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#endif
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DEFINE_PROP_UINT32("isobufs", USBHostDevice, iso_urb_count, 4),
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DEFINE_PROP_UINT32("isobsize", USBHostDevice, iso_urb_frames, 32),
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DEFINE_PROP_BOOL("guest-reset", USBHostDevice,
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@ -1723,7 +1770,7 @@ static void usb_host_auto_check(void *unused)
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if (s->dh != NULL) {
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continue;
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}
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if (usb_host_open(s, devs[i]) < 0) {
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if (usb_host_open(s, devs[i], 0) < 0) {
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s->errcount++;
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continue;
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}
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@ -291,6 +291,7 @@ usb_mtp_file_monitor_event(int dev, const char *path, const char *s) "dev %d, pa
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# host-libusb.c
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usb_host_open_started(int bus, int addr) "dev %d:%d"
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usb_host_open_hostfd(int hostfd) "hostfd %d"
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usb_host_open_success(int bus, int addr) "dev %d:%d"
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usb_host_open_failure(int bus, int addr) "dev %d:%d"
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usb_host_close(int bus, int addr) "dev %d:%d"
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