0eb8d46232
mutexes or using any callouts when active. Trying to lock a mutex when KDB is active or the scheduler is stopped can result in infinite wait loops. The same goes for calling callout related functions which in turn lock mutexes. If the USB controller at which a USB keyboard is connected is idle when KDB is entered, polling the USB keyboard via USB will always succeed. Else polling may fail depending on which state the USB subsystem and USB interrupt handler is in. This is unavoidable unless KDB can wait for USB interrupt threads to complete before stalling the CPU(s). Tested by: Bruce Evans <bde@freebsd.org> MFC after: 4 weeks
105 lines
3.9 KiB
C
105 lines
3.9 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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/*
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* Including this file is mandatory for all USB related c-files in the kernel.
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*/
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#ifndef _USB_FREEBSD_H_
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#define _USB_FREEBSD_H_
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/* Default USB configuration */
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#define USB_HAVE_UGEN 1
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#define USB_HAVE_DEVCTL 1
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#define USB_HAVE_BUSDMA 1
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#define USB_HAVE_COMPAT_LINUX 1
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#define USB_HAVE_USER_IO 1
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#define USB_HAVE_MBUF 1
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#define USB_HAVE_TT_SUPPORT 1
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#define USB_HAVE_POWERD 1
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#define USB_HAVE_MSCTEST 1
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#define USB_HAVE_MSCTEST_DETACH 1
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#define USB_HAVE_PF 1
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#define USB_HAVE_ROOT_MOUNT_HOLD 1
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#define USB_HAVE_ID_SECTION 1
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#define USB_HAVE_PER_BUS_PROCESS 1
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#define USB_HAVE_FIXED_ENDPOINT 0
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#define USB_HAVE_FIXED_IFACE 0
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#define USB_HAVE_FIXED_CONFIG 0
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#define USB_HAVE_FIXED_PORT 0
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#define USB_HAVE_DISABLE_ENUM 1
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/* define zero ticks callout value */
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#define USB_CALLOUT_ZERO_TICKS 1
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#define USB_TD_GET_PROC(td) (td)->td_proc
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#define USB_PROC_GET_GID(td) (td)->p_pgid
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#if (!defined(USB_HOST_ALIGN)) || (USB_HOST_ALIGN <= 0)
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/* Use default value. */
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#undef USB_HOST_ALIGN
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#if defined(__arm__) || defined(__mips__) || defined(__powerpc__)
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#define USB_HOST_ALIGN 32 /* Arm and MIPS need at least this much, if not more */
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#else
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#define USB_HOST_ALIGN 8 /* bytes, must be power of two */
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#endif
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#endif
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/* Sanity check for USB_HOST_ALIGN: Verify power of two. */
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#if ((-USB_HOST_ALIGN) & USB_HOST_ALIGN) != USB_HOST_ALIGN
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#error "USB_HOST_ALIGN is not power of two."
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#endif
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#define USB_FS_ISOC_UFRAME_MAX 4 /* exclusive unit */
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#define USB_BUS_MAX 256 /* units */
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#define USB_MAX_DEVICES 128 /* units */
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#define USB_CONFIG_MAX 65535 /* bytes */
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#define USB_IFACE_MAX 32 /* units */
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#define USB_FIFO_MAX 128 /* units */
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#define USB_MAX_EP_STREAMS 8 /* units */
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#define USB_MAX_EP_UNITS 32 /* units */
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#define USB_MAX_PORTS 255 /* units */
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#define USB_MAX_FS_ISOC_FRAMES_PER_XFER (120) /* units */
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#define USB_MAX_HS_ISOC_FRAMES_PER_XFER (8*120) /* units */
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#define USB_HUB_MAX_DEPTH 5
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#define USB_EP0_BUFSIZE 1024 /* bytes */
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#define USB_CS_RESET_LIMIT 20 /* failures = 20 * 50 ms = 1sec */
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#define USB_MAX_AUTO_QUIRK 8 /* maximum number of dynamic quirks */
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#define USB_IN_POLLING_MODE_FUNC() usbd_in_polling_mode()
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#define USB_IN_POLLING_MODE_VALUE() (SCHEDULER_STOPPED() || kdb_active)
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typedef uint32_t usb_timeout_t; /* milliseconds */
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typedef uint32_t usb_frlength_t; /* bytes */
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typedef uint32_t usb_frcount_t; /* units */
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typedef uint32_t usb_size_t; /* bytes */
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typedef uint32_t usb_ticks_t; /* system defined */
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typedef uint16_t usb_power_mask_t; /* see "USB_HW_POWER_XXX" */
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typedef uint16_t usb_stream_t; /* stream ID */
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#endif /* _USB_FREEBSD_H_ */
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