/*- * Copyright (c) 2000 Michael Smith * Copyright (c) 2000 BSDi * 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. * 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. * * $FreeBSD$ */ #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Interface to parent. */ static int aac_disk_probe(device_t dev); static int aac_disk_attach(device_t dev); static int aac_disk_detach(device_t dev); /* * Interface to the device switch. */ static d_open_t aac_disk_open; static d_close_t aac_disk_close; static d_strategy_t aac_disk_strategy; #define AAC_DISK_CDEV_MAJOR 151 static struct cdevsw aac_disk_cdevsw = { /* open */ aac_disk_open, /* close */ aac_disk_close, /* read */ physread, /* write */ physwrite, /* ioctl */ noioctl, /* poll */ nopoll, /* mmap */ nommap, /* strategy */ aac_disk_strategy, /* name */ "aacd", /* maj */ AAC_DISK_CDEV_MAJOR, /* dump */ nodump, /* psize */ nopsize, /* flags */ D_DISK, /* bmaj */ -1 }; devclass_t aac_disk_devclass; static struct cdevsw aac_disk_disk_cdevsw; #ifdef FREEBSD_4 static int disks_registered = 0; #endif static device_method_t aac_disk_methods[] = { DEVMETHOD(device_probe, aac_disk_probe), DEVMETHOD(device_attach, aac_disk_attach), DEVMETHOD(device_detach, aac_disk_detach), { 0, 0 } }; static driver_t aac_disk_driver = { "aacd", aac_disk_methods, sizeof(struct aac_disk) }; DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0); /******************************************************************************** * Handle open from generic layer. * * This is called by the diskslice code on first open in order to get the * basic device geometry paramters. */ static int aac_disk_open(dev_t dev, int flags, int fmt, struct proc *p) { struct aac_disk *sc = (struct aac_disk *)dev->si_drv1; struct disklabel *label; debug_called(4); if (sc == NULL) return (ENXIO); /* check that the controller is up and running */ if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) return(ENXIO); /* build synthetic label */ label = &sc->ad_disk.d_label; bzero(label, sizeof(*label)); label->d_type = DTYPE_ESDI; label->d_secsize = AAC_BLOCK_SIZE; label->d_nsectors = sc->ad_sectors; label->d_ntracks = sc->ad_heads; label->d_ncylinders = sc->ad_cylinders; label->d_secpercyl = sc->ad_sectors * sc->ad_heads; label->d_secperunit = sc->ad_size; sc->ad_flags |= AAC_DISK_OPEN; return (0); } /******************************************************************************** * Handle last close of the disk device. */ static int aac_disk_close(dev_t dev, int flags, int fmt, struct proc *p) { struct aac_disk *sc = (struct aac_disk *)dev->si_drv1; debug_called(4); if (sc == NULL) return (ENXIO); sc->ad_flags &= ~AAC_DISK_OPEN; return (0); } /******************************************************************************** * Handle an I/O request. */ static void aac_disk_strategy(struct bio *bp) { struct aac_disk *sc = (struct aac_disk *)bp->bio_dev->si_drv1; debug_called(4); /* bogus disk? */ if (sc == NULL) { bp->bio_flags |= BIO_ERROR; bp->bio_error = EINVAL; biodone(bp); return; } /* do-nothing operation? */ if (bp->bio_bcount == 0) { bp->bio_resid = bp->bio_bcount; biodone(bp); return; } /* perform accounting */ devstat_start_transaction(&sc->ad_stats); /* pass the bio to the controller - it can work out who we are */ aac_submit_bio(bp); return; } /******************************************************************************** * Handle completion of an I/O request. */ void aac_complete_bio(struct bio *bp) { struct aac_disk *sc = (struct aac_disk *)bp->bio_dev->si_drv1; debug_called(4); devstat_end_transaction_bio(&sc->ad_stats, bp); biodone(bp); } /******************************************************************************** * Stub only. */ static int aac_disk_probe(device_t dev) { debug_called(4); return (0); } /******************************************************************************** * Attach a unit to the controller. */ static int aac_disk_attach(device_t dev) { struct aac_disk *sc = (struct aac_disk *)device_get_softc(dev); int sgspace; int maxsg; debug_called(4); /* initialise our softc */ sc->ad_controller = (struct aac_softc *)device_get_softc(device_get_parent(dev)); sc->ad_container = device_get_ivars(dev); sc->ad_dev = dev; /* require that extended translation be enabled XXX document! */ sc->ad_size = sc->ad_container->co_mntobj.Capacity; if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */ sc->ad_heads = 255; sc->ad_sectors = 63; } else if (sc->ad_size >= (2 * 1024 * 1024)) { /* 1GB */ sc->ad_heads = 128; sc->ad_sectors = 32; } else { sc->ad_heads = 64; sc->ad_sectors = 32; } sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors)); device_printf(dev, "%uMB (%u sectors)\n", sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE), sc->ad_size); devstat_add_entry(&sc->ad_stats, "aacd", device_get_unit(dev), AAC_BLOCK_SIZE, DEVSTAT_NO_ORDERED_TAGS, DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, DEVSTAT_PRIORITY_ARRAY); /* attach a generic disk device to ourselves */ sc->ad_dev_t = disk_create(device_get_unit(dev), &sc->ad_disk, 0, &aac_disk_cdevsw, &aac_disk_disk_cdevsw); sc->ad_dev_t->si_drv1 = sc; #ifdef FREEBSD_4 disks_registered++; #endif /* * We can calculate the maximum number of s/g entries based on the size of the * FIB and the command structures packed within it. */ sgspace = (sizeof(struct aac_fib) - sizeof(struct aac_fib_header) - imax(sizeof(struct aac_blockwrite), sizeof(struct aac_blockread))); maxsg = (sgspace - sizeof(struct aac_sg_table)) / sizeof(struct aac_sg_entry); /* set the maximum I/O size to the theoretical worst maximum allowed by the S/G list size */ sc->ad_dev_t->si_iosize_max = (maxsg - 1) * PAGE_SIZE; return (0); } /******************************************************************************** * Disconnect ourselves from the system. */ static int aac_disk_detach(device_t dev) { struct aac_disk *sc = (struct aac_disk *)device_get_softc(dev); debug_called(4); if (sc->ad_flags & AAC_DISK_OPEN) return(EBUSY); devstat_remove_entry(&sc->ad_stats); #ifdef FREEBSD_4 if (--disks_registered == 0) cdevsw_remove(&aac_disk_disk_cdevsw); #else disk_destroy(sc->ad_dev_t); #endif return(0); }