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d64e9217c4
on USB HUBs by moving the code into the USB explore threads. The deadlock happens because child devices of the USB HUB don't have the expected reference count when called from outside the explore thread. Only the HUB device itself, which the IOCTL interface locks, gets the correct reference count. MFC after: 3 days
81 lines
2.9 KiB
C
81 lines
2.9 KiB
C
/* $FreeBSD$ */
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/*-
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* Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _USB_HUB_H_
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#define _USB_HUB_H_
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/*
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* The following structure defines an USB port.
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*/
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struct usb_port {
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uint8_t restartcnt;
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#define USB_RESTART_MAX 5
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uint8_t device_index; /* zero means not valid */
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enum usb_hc_mode usb_mode; /* host or device mode */
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#if USB_HAVE_TT_SUPPORT
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struct usb_device_request req_reset_tt __aligned(4);
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#endif
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};
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/*
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* The following structure defines an USB HUB.
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*/
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struct usb_hub {
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struct usb_device *hubudev; /* the HUB device */
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usb_error_t (*explore) (struct usb_device *hub);
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void *hubsoftc;
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#if USB_HAVE_TT_SUPPORT
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struct usb_udev_msg tt_msg[2];
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#endif
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usb_size_t uframe_usage[USB_HS_MICRO_FRAMES_MAX];
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uint16_t portpower; /* mA per USB port */
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uint8_t isoc_last_time;
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uint8_t nports;
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#if (USB_HAVE_FIXED_PORT == 0)
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struct usb_port ports[0];
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#else
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struct usb_port ports[USB_MAX_PORTS];
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#endif
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};
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/* function prototypes */
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void usb_hs_bandwidth_alloc(struct usb_xfer *xfer);
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void usb_hs_bandwidth_free(struct usb_xfer *xfer);
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void usb_bus_port_set_device(struct usb_bus *bus, struct usb_port *up,
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struct usb_device *udev, uint8_t device_index);
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struct usb_device *usb_bus_port_get_device(struct usb_bus *bus,
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struct usb_port *up);
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void usb_needs_explore(struct usb_bus *bus, uint8_t do_probe);
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void usb_needs_explore_all(void);
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void usb_bus_power_update(struct usb_bus *bus);
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void usb_bus_powerd(struct usb_bus *bus);
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void uhub_root_intr(struct usb_bus *, const uint8_t *, uint8_t);
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usb_error_t uhub_query_info(struct usb_device *, uint8_t *, uint8_t *);
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void uhub_explore_handle_re_enumerate(struct usb_device *);
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#endif /* _USB_HUB_H_ */
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