diff options
Diffstat (limited to 'sys/dev/ata/ata-disk.h')
| -rw-r--r-- | sys/dev/ata/ata-disk.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/sys/dev/ata/ata-disk.h b/sys/dev/ata/ata-disk.h new file mode 100644 index 0000000..0c190d1 --- /dev/null +++ b/sys/dev/ata/ata-disk.h @@ -0,0 +1,86 @@ +/*- + * Copyright (c) 1998,1999,2000,2001,2002 Søren Schmidt <sos@FreeBSD.org> + * All rights reserved. + * + * 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, + * without modification, immediately at the beginning of the file. + * 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. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. + * + * $FreeBSD$ + */ + +/* structure describing an ATA disk request */ +struct ad_request { + struct ad_softc *softc; /* ptr to parent device */ + u_int32_t blockaddr; /* block number */ + u_int32_t bytecount; /* bytes to transfer */ + u_int32_t donecount; /* bytes transferred */ + u_int32_t currentsize; /* size of current transfer */ + struct callout_handle timeout_handle; /* handle for untimeout */ + int retries; /* retry count */ + int flags; +#define ADR_F_READ 0x0001 +#define ADR_F_ERROR 0x0002 +#define ADR_F_DMA_USED 0x0004 +#define ADR_F_QUEUED 0x0008 +#define ADR_F_FORCE_PIO 0x0010 + + caddr_t data; /* pointer to data buf */ + struct bio *bp; /* associated bio ptr */ + u_int8_t tag; /* tag ID of this request */ + int serv; /* request had service */ + TAILQ_ENTRY(ad_request) chain; /* list management */ +}; + +/* structure describing an ATA disk */ +struct ad_softc { + struct ata_device *device; /* ptr to device softc */ + int lun; /* logical unit number */ + u_int64_t total_secs; /* total # of sectors (LBA) */ + u_int8_t heads; + u_int8_t sectors; + u_int32_t transfersize; /* size of each transfer */ + int num_tags; /* number of tags supported */ + int max_iosize; /* max size of transfer */ + int flags; /* drive flags */ +#define AD_F_LABELLING 0x0001 +#define AD_F_CHS_USED 0x0002 +#define AD_F_32B_ENABLED 0x0004 +#define AD_F_TAG_ENABLED 0x0008 +#define AD_F_RAID_SUBDISK 0x0010 + + struct ad_request *tags[32]; /* tag array of requests */ + int outstanding; /* tags not serviced yet */ + struct bio_queue_head queue; /* head of request queue */ + struct devstat stats; /* devstat entry */ + struct disk disk; /* disklabel/slice stuff */ + dev_t dev; /* device place holder */ +}; + +void ad_attach(struct ata_device *); +void ad_detach(struct ata_device *, int); +void ad_reinit(struct ata_device *); +void ad_start(struct ata_device *); +int ad_transfer(struct ad_request *); +int ad_interrupt(struct ad_request *); +int ad_service(struct ad_softc *, int); +void ad_print(struct ad_softc *); |
