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43ea03d756
like RPI-B and RPI-2. Description of problem: USB transfers can process data in their callbacks sometimes causing unacceptable latency for other USB transfers. Separate BULK completion callbacks from CONTROL, INTERRUPT and ISOCHRONOUS callbacks, and give BULK completion callbacks lesser execution priority than the others. This way USB audio won't be interfered by heavy USB ethernet usage for example. Further serve USB transfer completion in a round robin fashion, instead of only serving the most CPU hungry. This has been done by adding a third flag to USB transfer queue structure which keeps track of looping callbacks. The "command" callback function then decides what to do when looping. MFC after: 2 weeks
93 lines
3.0 KiB
C
93 lines
3.0 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_PROCESS_H_
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#define _USB_PROCESS_H_
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#ifndef USB_GLOBAL_INCLUDE_FILE
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#include <sys/interrupt.h>
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#include <sys/priority.h>
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#include <sys/runq.h>
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#endif
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/* defines */
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#define USB_PRI_HIGHEST PI_SWI(SWI_TTY)
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#define USB_PRI_HIGH PI_SWI(SWI_NET)
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#define USB_PRI_MED PI_SWI(SWI_CAMBIO)
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#define USB_PROC_WAIT_TIMEOUT 2
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#define USB_PROC_WAIT_DRAIN 1
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#define USB_PROC_WAIT_NORMAL 0
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/* structure prototypes */
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struct usb_proc_msg;
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struct usb_device;
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/*
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* The following structure defines the USB process.
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*/
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struct usb_process {
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TAILQ_HEAD(, usb_proc_msg) up_qhead;
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struct cv up_cv;
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struct cv up_drain;
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#if (__FreeBSD_version >= 800000)
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struct thread *up_ptr;
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#else
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struct proc *up_ptr;
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#endif
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struct thread *up_curtd;
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struct mtx *up_mtx;
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usb_size_t up_msg_num;
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uint8_t up_prio;
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uint8_t up_gone;
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uint8_t up_msleep;
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uint8_t up_csleep;
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uint8_t up_dsleep;
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};
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/* prototypes */
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uint8_t usb_proc_is_gone(struct usb_process *up);
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int usb_proc_create(struct usb_process *up, struct mtx *p_mtx,
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const char *pmesg, uint8_t prio);
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void usb_proc_drain(struct usb_process *up);
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void usb_proc_mwait(struct usb_process *up, void *pm0, void *pm1);
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void usb_proc_free(struct usb_process *up);
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void *usb_proc_msignal(struct usb_process *up, void *pm0, void *pm1);
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void usb_proc_rewakeup(struct usb_process *up);
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int usb_proc_is_called_from(struct usb_process *up);
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void usb_proc_explore_mwait(struct usb_device *, void *, void *);
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void *usb_proc_explore_msignal(struct usb_device *, void *, void *);
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void usb_proc_explore_lock(struct usb_device *);
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void usb_proc_explore_unlock(struct usb_device *);
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#endif /* _USB_PROCESS_H_ */
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