2 * Copyright (c) 1998,1999,2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer,
10 * without modification, immediately at the beginning of the file.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 /* structure describing an ATA disk request */
33 struct ad_softc *softc; /* ptr to parent device */
34 u_int32_t blockaddr; /* block number */
35 u_int32_t bytecount; /* bytes to transfer */
36 u_int32_t donecount; /* bytes transferred */
37 u_int32_t currentsize; /* size of current transfer */
38 struct callout_handle timeout_handle; /* handle for untimeout */
39 int retries; /* retry count */
41 #define ADR_F_READ 0x0001
42 #define ADR_F_ERROR 0x0002
43 #define ADR_F_DMA_USED 0x0004
44 #define ADR_F_QUEUED 0x0008
45 #define ADR_F_FORCE_PIO 0x0010
47 caddr_t data; /* pointer to data buf */
48 struct bio *bp; /* associated bio ptr */
49 u_int8_t tag; /* tag ID of this request */
50 int serv; /* request had service */
51 TAILQ_ENTRY(ad_request) chain; /* list management */
54 /* structure describing an ATA disk */
56 struct ata_device *device; /* ptr to device softc */
57 int lun; /* logical unit number */
58 u_int64_t total_secs; /* total # of sectors (LBA) */
61 u_int32_t transfersize; /* size of each transfer */
62 int num_tags; /* number of tags supported */
63 int max_iosize; /* max size of transfer */
64 int flags; /* drive flags */
65 #define AD_F_LABELLING 0x0001
66 #define AD_F_CHS_USED 0x0002
67 #define AD_F_32B_ENABLED 0x0004
68 #define AD_F_TAG_ENABLED 0x0008
69 #define AD_F_RAID_SUBDISK 0x0010
71 struct ad_request *tags[32]; /* tag array of requests */
72 int outstanding; /* tags not serviced yet */
73 struct bio_queue_head queue; /* head of request queue */
74 struct devstat stats; /* devstat entry */
75 struct disk disk; /* disklabel/slice stuff */
76 dev_t dev; /* device place holder */
79 void ad_attach(struct ata_device *);
80 void ad_detach(struct ata_device *, int);
81 void ad_reinit(struct ata_device *);
82 void ad_start(struct ata_device *);
83 int ad_transfer(struct ad_request *);
84 int ad_interrupt(struct ad_request *);
85 int ad_service(struct ad_softc *, int);
86 void ad_print(struct ad_softc *);