7800211b08
Initial work & code by tmm. Lots of changes and rearrangements by yours truely to make busdma be a little less a PITA (but I still dont like it).
86 lines
3.6 KiB
C
86 lines
3.6 KiB
C
/*-
|
|
* 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 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 *);
|