NetBSD/sys/dev/pci/twevar.h

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/* $NetBSD: twevar.h,v 1.13 2002/12/13 23:31:33 christos Exp $ */
/*-
* Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 THE FOUNDATION OR CONTRIBUTORS
* 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.
*/
#ifndef _PCI_TWEVAR_H_
#define _PCI_TWEVAR_H_
#include "locators.h"
#define TWE_MAX_QUEUECNT 129
/* Per-controller state. */
struct twe_softc {
struct device sc_dv;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
bus_dma_tag_t sc_dmat;
bus_dmamap_t sc_dmamap;
void *sc_ih;
caddr_t sc_cmds;
bus_addr_t sc_cmds_paddr;
int sc_nccbs;
struct twe_ccb *sc_ccbs;
SIMPLEQ_HEAD(, twe_ccb) sc_ccb_queue;
SLIST_HEAD(, twe_ccb) sc_ccb_freelist;
int sc_flags;
int sc_nunits;
u_int sc_dsize[TWE_MAX_UNITS];
};
#define TWEF_AEN 0x01 /* retrieving an AEN */
#define TWEF_OPEN 0x02 /* control device is opened */
/* Optional per-command context. */
struct twe_context {
void (*tx_handler)(struct twe_ccb *, int);
void *tx_context;
struct device *tx_dv;
};
/* Command control block. */
struct twe_ccb {
union {
SIMPLEQ_ENTRY(twe_ccb) simpleq;
SLIST_ENTRY(twe_ccb) slist;
} ccb_chain;
struct twe_cmd *ccb_cmd;
int ccb_cmdid;
int ccb_flags;
void *ccb_data;
int ccb_datasize;
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vaddr_t ccb_abuf;
bus_dmamap_t ccb_dmamap_xfer;
struct twe_context ccb_tx;
};
#define TWE_CCB_DATA_IN 0x01 /* Map describes inbound xfer */
#define TWE_CCB_DATA_OUT 0x02 /* Map describes outbound xfer */
#define TWE_CCB_COMPLETE 0x04 /* Command completed */
#define TWE_CCB_ACTIVE 0x08 /* Command active */
#define TWE_CCB_PARAM 0x10 /* For parameter retrieval */
#define TWE_CCB_ALLOCED 0x20 /* CCB allocated */
struct twe_attach_args {
int twea_unit;
};
#define tweacf_unit cf_loc[TWECF_UNIT]
int twe_ccb_alloc(struct twe_softc *, struct twe_ccb **, int);
void twe_ccb_enqueue(struct twe_softc *sc, struct twe_ccb *ccb);
void twe_ccb_free(struct twe_softc *sc, struct twe_ccb *);
int twe_ccb_map(struct twe_softc *, struct twe_ccb *);
int twe_ccb_poll(struct twe_softc *, struct twe_ccb *, int);
int twe_ccb_submit(struct twe_softc *, struct twe_ccb *);
void twe_ccb_unmap(struct twe_softc *, struct twe_ccb *);
static __inline__ size_t twe_get_maxsegs(void) {
size_t max_segs = ((MAXPHYS + PAGE_SIZE - 1) / PAGE_SIZE) + 1;
#ifdef TWE_SG_SIZE
if (TWE_SG_SIZE < max_segs)
max_segs = TWE_SG_SIZE;
#endif
return max_segs;
}
static __inline__ size_t twe_get_maxxfer(size_t maxsegs) {
return (maxsegs - 1) * PAGE_SIZE;
}
#endif /* !_PCI_TWEVAR_H_ */