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/*-
* Copyright (c) 2012 Robert N. M. Watson
* Copyright (c) 2012 SRI International
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _DEV_ISF_H_
#define _DEV_ISF_H_
struct isf_range {
off_t ir_off; /* Offset of range to delete (set to 0xFF) */
size_t ir_size; /* Size of range */
};
#define ISF_ERASE _IOW('I', 1, struct isf_range)
/*
* Ordinary read and write operations are limited to 512 bytes.
* We support erasing 128K blocks and ignore the fact that portions of the
* flash are in fact divided into 32K blocks.
*/
#define ISF_SECTORSIZE (512)
#define ISF_ERASE_BLOCK (128 * 1024)
#ifdef _KERNEL
MALLOC_DECLARE(M_ISF);
enum bstate {
BS_STEADY = 0,
BS_ERASING
};
struct isf_softc {
device_t isf_dev;
int isf_unit;
struct resource *isf_res;
int isf_rid;
struct mtx isf_lock;
struct disk *isf_disk;
struct proc *isf_proc;
int isf_doomed;
/*
* Fields relating to in-progress and pending I/O, if any.
*/
struct bio_queue_head isf_bioq;
uint16_t isf_rbuf[ISF_SECTORSIZE / 2];
int isf_erasing;
enum bstate *isf_bstate;
};
#define ISF_LOCK(sc) mtx_lock(&(sc)->isf_lock)
#define ISF_LOCK_ASSERT(sc) mtx_assert(&(sc)->isf_lock, MA_OWNED)
#define ISF_LOCK_DESTROY(sc) mtx_destroy(&(sc)->isf_lock)
#define ISF_LOCK_INIT(sc) mtx_init(&(sc)->isf_lock, "isf", NULL, \
MTX_DEF)
#define ISF_SLEEP(sc, wait, timo) mtx_sleep((wait), \
&(sc)->isf_lock, PRIBIO, \
"isf", (timo))
#define ISF_UNLOCK(sc) mtx_unlock(&(sc)->isf_lock)
#define ISF_WAKEUP(sc) wakeup((sc))
int isf_attach(struct isf_softc *sc);
void isf_detach(struct isf_softc *sc);
extern devclass_t isf_devclass;
#endif /* _KERNEL */
#endif /* _DEV_ISF_H_ */
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