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if_xennetvar.h revision 1.5 
      1 /*	$NetBSD: if_xennetvar.h,v 1.5 2005/04/16 22:49:37 bouyer Exp $	*/
      2 
      3 /*
      4  *
      5  * Copyright (c) 2004 Christian Limpach.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *      This product includes software developed by Christian Limpach.
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 
     35 #ifndef _XEN_IF_XENNETVAR_H_
     36 #define _XEN_IF_XENNETVAR_H_
     37 
     38 #include <machine/xen.h>
     39 
     40 union xennet_bufarray {
     41 	struct {
     42 		struct mbuf *xbtx_m;
     43 	} xb_tx;
     44 	struct {
     45 		vaddr_t xbrx_va;
     46 		paddr_t xbrx_pa;
     47 		struct xennet_softc *xbrx_sc;
     48 	} xb_rx;
     49 	int xb_next;
     50 };
     51 
     52 struct xennet_txbuf {
     53 	SLIST_ENTRY(xennet_txbuf)	xt_next;
     54 	struct xennet_softc		*xt_sc;
     55 	paddr_t				xt_pa;
     56 	u_char				xt_buf[0];
     57 };
     58 #define	TXBUF_PER_PAGE 2
     59 #define	TXBUF_BUFSIZE	(PAGE_SIZE / TXBUF_PER_PAGE) - sizeof(struct xennet_txbuf)
     60 
     61 struct xennet_softc {
     62 	struct device		sc_dev;		/* base device glue */
     63 	struct ethercom		sc_ethercom;	/* Ethernet common part */
     64 
     65 	int			sc_ifno;
     66 
     67 	uint8_t			sc_enaddr[6];
     68 
     69 #ifdef mediacode
     70 	struct ifmedia		sc_media;
     71 #endif
     72 
     73 	/* What is the status of our connection to the remote backend? */
     74 #define BEST_CLOSED       0
     75 #define BEST_DISCONNECTED 1
     76 #define BEST_CONNECTED    2
     77 	unsigned int		sc_backend_state;
     78 
     79 	unsigned int		sc_evtchn;
     80 
     81 	netif_tx_interface_t	*sc_tx;
     82 	netif_rx_interface_t	*sc_rx;
     83 	struct vm_page		*sc_pg_tx;
     84 	struct vm_page		*sc_pg_rx;
     85 
     86 	uint32_t		sc_tx_entries;
     87 	uint32_t		sc_tx_resp_cons;
     88 
     89 	uint32_t		sc_rx_resp_cons;
     90 	uint32_t		sc_rx_bufs_to_notify;
     91 
     92 	union xennet_bufarray	sc_tx_bufa[NETIF_TX_RING_SIZE];
     93 	union xennet_bufarray	sc_rx_bufa[NETIF_TX_RING_SIZE];
     94 
     95 	SLIST_HEAD(, xennet_txbuf)	sc_tx_bufs;
     96 
     97 #if NRND > 0
     98 	rndsource_element_t	sc_rnd_source;
     99 #endif
    100 };
    101 
    102 struct xennet_attach_args {
    103 	const char 		*xa_device;
    104 	int			xa_handle;
    105 };
    106 
    107 struct nfs_diskless;
    108 
    109 int xennet_scan(struct device *, struct xennet_attach_args *, cfprint_t);
    110 void xennet_scan_finish(struct device *);
    111 void xennet_start(struct ifnet *);
    112 int xennet_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
    113 void xennet_watchdog(struct ifnet *ifp);
    114 int xennet_bootstatic_callback(struct nfs_diskless *);
    115 
    116 #endif /* _XEN_IF_XENNETVAR_H_ */
    117