86 lines
3.6 KiB
C
86 lines
3.6 KiB
C
/*-
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* Copyright (c) 1998 - 2003 Søren Schmidt <sos@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/* structure describing an ATA disk request */
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struct ad_request {
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struct ad_softc *softc; /* ptr to parent device */
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u_int32_t blockaddr; /* block number */
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u_int32_t bytecount; /* bytes to transfer */
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u_int32_t donecount; /* bytes transferred */
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u_int32_t currentsize; /* size of current transfer */
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struct callout_handle timeout_handle; /* handle for untimeout */
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int retries; /* retry count */
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int flags;
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#define ADR_F_READ 0x0001
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#define ADR_F_ERROR 0x0002
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#define ADR_F_DMA_USED 0x0004
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#define ADR_F_QUEUED 0x0008
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#define ADR_F_FORCE_PIO 0x0010
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caddr_t data; /* pointer to data buf */
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struct bio *bp; /* associated bio ptr */
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u_int8_t tag; /* tag ID of this request */
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int serv; /* request had service */
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TAILQ_ENTRY(ad_request) chain; /* list management */
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};
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/* structure describing an ATA disk */
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struct ad_softc {
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struct ata_device *device; /* ptr to device softc */
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int lun; /* logical unit number */
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u_int64_t total_secs; /* total # of sectors (LBA) */
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u_int8_t heads;
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u_int8_t sectors;
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u_int32_t transfersize; /* size of each transfer */
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int num_tags; /* number of tags supported */
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int max_iosize; /* max size of transfer */
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int flags; /* drive flags */
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#define AD_F_LABELLING 0x0001
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#define AD_F_CHS_USED 0x0002
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#define AD_F_32B_ENABLED 0x0004
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#define AD_F_TAG_ENABLED 0x0008
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#define AD_F_RAID_SUBDISK 0x0010
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struct ad_request *tags[32]; /* tag array of requests */
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int outstanding; /* tags not serviced yet */
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struct bio_queue_head queue; /* head of request queue */
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struct devstat stats; /* devstat entry */
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struct disk disk; /* disklabel/slice stuff */
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};
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void ad_attach(struct ata_device *);
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void ad_detach(struct ata_device *, int);
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void ad_reinit(struct ata_device *);
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void ad_start(struct ata_device *);
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int ad_transfer(struct ad_request *);
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int ad_interrupt(struct ad_request *);
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int ad_service(struct ad_softc *, int);
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void ad_print(struct ad_softc *);
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