freebsd-skq/sys/dev/usb/usb_ethersubr.h
Alfred Perlstein b262697660 Add the following functions to abstract away the creation of task threads
for usb.  I hope that this will eventually be used for generic devices
that need full fledged blocking threads for event processing.

Create a taskqueue:
void usb_ether_task_init(device_t, int, struct usb_taskqueue *);

Enqueue a task:
void usb_ether_task_enqueue(struct usb_taskqueue *, struct task *);

Wait for all tasks queued to complete:
void usb_ether_task_drain(struct usb_taskqueue *, struct task *);

Destroy the taskqueue:
void usb_ether_task_destroy(struct usb_taskqueue *);
2007-01-08 23:21:06 +00:00

92 lines
3.1 KiB
C

/*-
* Copyright (c) 1997, 1998, 1999, 2000
* Bill Paul <wpaul@ee.columbia.edu>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _USB_ETHERSUBR_H_
#define _USB_ETHERSUBR_H_
#include <sys/bus.h>
#include <sys/module.h>
#include <dev/usb/usbdi.h>
#define UE_TX_LIST_CNT 1
#define UE_RX_LIST_CNT 1
#define UE_BUFSZ 1536
struct usb_qdat {
struct ifnet *ifp;
void (*if_rxstart) (struct ifnet *);
};
struct ue_chain {
void *ue_sc;
usbd_xfer_handle ue_xfer;
char *ue_buf;
struct mbuf *ue_mbuf;
int ue_idx;
usbd_status ue_status;
};
struct ue_cdata {
struct ue_chain ue_tx_chain[UE_TX_LIST_CNT];
struct ue_chain ue_rx_chain[UE_RX_LIST_CNT];
void *ue_ibuf;
int ue_tx_prod;
int ue_tx_cons;
int ue_tx_cnt;
int ue_rx_prod;
};
void usb_register_netisr (void);
void usb_ether_input (struct mbuf *);
void usb_tx_done (struct mbuf *);
struct mbuf *usb_ether_newbuf (void);
int usb_ether_rx_list_init (void *, struct ue_cdata *,
usbd_device_handle);
int usb_ether_tx_list_init (void *, struct ue_cdata *,
usbd_device_handle);
void usb_ether_rx_list_free (struct ue_cdata *);
void usb_ether_tx_list_free (struct ue_cdata *);
struct usb_taskqueue {
int dummy;
};
void usb_ether_task_init(device_t, int, struct usb_taskqueue *);
void usb_ether_task_enqueue(struct usb_taskqueue *, struct task *);
void usb_ether_task_drain(struct usb_taskqueue *, struct task *);
void usb_ether_task_destroy(struct usb_taskqueue *);
#endif /* _USB_ETHERSUBR_H_ */