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twevar.h revision 1.9 
      1 /*	$NetBSD: twevar.h,v 1.9 2001/10/10 09:33:36 ad Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _PCI_TWEVAR_H_
     40 #define	_PCI_TWEVAR_H_
     41 
     42 #include "locators.h"
     43 
     44 #define	TWE_MAX_QUEUECNT	129
     45 
     46 /* XXX NBPG */
     47 #if TWE_SG_SIZE > (((MAXPHYS + NBPG - 1) / NBPG) + 1)
     48 #define	TWE_MAX_SEGS	(((MAXPHYS + NBPG - 1) / NBPG) + 1)
     49 #else
     50 #define	TWE_MAX_SEGS	TWE_SG_SIZE
     51 #endif
     52 #define	TWE_MAX_XFER	((TWE_MAX_SEGS - 1) * NBPG)
     53 
     54 /* Per-controller state. */
     55 struct twe_softc {
     56 	struct device		sc_dv;
     57 	bus_space_tag_t		sc_iot;
     58 	bus_space_handle_t	sc_ioh;
     59 	bus_dma_tag_t		sc_dmat;
     60 	bus_dmamap_t		sc_dmamap;
     61 	void			*sc_ih;
     62 	caddr_t			sc_cmds;
     63 	bus_addr_t		sc_cmds_paddr;
     64 	int			sc_nccbs;
     65 	struct twe_ccb		*sc_ccbs;
     66 	SIMPLEQ_HEAD(, twe_ccb)	sc_ccb_queue;
     67 	SLIST_HEAD(, twe_ccb)	sc_ccb_freelist;
     68 	int			sc_flags;
     69 	int			sc_nunits;
     70 	u_int			sc_dsize[TWE_MAX_UNITS];
     71 };
     72 #define	TWEF_AEN	0x01	/* retrieving an AEN */
     73 
     74 /* Optional per-command context. */
     75 struct twe_context {
     76 	void	(*tx_handler)(struct twe_ccb *, int);
     77 	void 	*tx_context;
     78 	struct	device	*tx_dv;
     79 };
     80 
     81 /* Command control block. */
     82 struct twe_ccb {
     83 	union {
     84 		SIMPLEQ_ENTRY(twe_ccb) simpleq;
     85 		SLIST_ENTRY(twe_ccb) slist;
     86 	} ccb_chain;
     87 	struct twe_cmd	*ccb_cmd;
     88 	int		ccb_cmdid;
     89 	int		ccb_flags;
     90 	void		*ccb_data;
     91 	int		ccb_datasize;
     92 	vaddr_t		ccb_abuf;
     93 	bus_dmamap_t	ccb_dmamap_xfer;
     94 	struct twe_context ccb_tx;
     95 };
     96 #define	TWE_CCB_DATA_IN		0x01	/* Map describes inbound xfer */
     97 #define	TWE_CCB_DATA_OUT	0x02	/* Map describes outbound xfer */
     98 #define	TWE_CCB_COMPLETE	0x04	/* Command completed */
     99 #define	TWE_CCB_ACTIVE		0x08	/* Command active */
    100 #define	TWE_CCB_PARAM		0x10	/* For parameter retrieval */
    101 #define	TWE_CCB_ALLOCED		0x20	/* CCB allocated */
    102 
    103 struct twe_attach_args {
    104 	int		twea_unit;
    105 };
    106 
    107 #define	tweacf_unit	cf_loc[TWECF_UNIT]
    108 
    109 int	twe_ccb_alloc(struct twe_softc *, struct twe_ccb **, int);
    110 void	twe_ccb_enqueue(struct twe_softc *sc, struct twe_ccb *ccb);
    111 void	twe_ccb_free(struct twe_softc *sc, struct twe_ccb *);
    112 int	twe_ccb_map(struct twe_softc *, struct twe_ccb *);
    113 int	twe_ccb_poll(struct twe_softc *, struct twe_ccb *, int);
    114 int	twe_ccb_submit(struct twe_softc *, struct twe_ccb *);
    115 void	twe_ccb_unmap(struct twe_softc *, struct twe_ccb *);
    116 
    117 #endif	/* !_PCI_TWEVAR_H_ */
    118