399 lines
9.1 KiB
C
399 lines
9.1 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2001 Scott Long
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* Copyright (c) 2000 BSDi
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* Copyright (c) 2001 Adaptec, Inc.
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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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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_aac.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/sysctl.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/disk.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/md_var.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <dev/aac/aacreg.h>
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#include <dev/aac/aac_ioctl.h>
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#include <dev/aac/aacvar.h>
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/*
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* Interface to parent.
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*/
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static int aac_disk_probe(device_t dev);
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static int aac_disk_attach(device_t dev);
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static int aac_disk_detach(device_t dev);
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/*
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* Interface to the device switch.
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*/
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static disk_open_t aac_disk_open;
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static disk_close_t aac_disk_close;
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static disk_strategy_t aac_disk_strategy;
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static dumper_t aac_disk_dump;
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static devclass_t aac_disk_devclass;
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static device_method_t aac_disk_methods[] = {
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DEVMETHOD(device_probe, aac_disk_probe),
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DEVMETHOD(device_attach, aac_disk_attach),
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DEVMETHOD(device_detach, aac_disk_detach),
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{ 0, 0 }
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};
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static driver_t aac_disk_driver = {
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"aacd",
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aac_disk_methods,
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sizeof(struct aac_disk)
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};
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#define AAC_MAXIO 65536
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DRIVER_MODULE(aacd, aac, aac_disk_driver, aac_disk_devclass, 0, 0);
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/* sysctl tunables */
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static unsigned int aac_iosize_max = AAC_MAXIO; /* due to limits of the card */
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TUNABLE_INT("hw.aac.iosize_max", &aac_iosize_max);
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SYSCTL_DECL(_hw_aac);
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SYSCTL_UINT(_hw_aac, OID_AUTO, iosize_max, CTLFLAG_RDTUN, &aac_iosize_max, 0,
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"Max I/O size per transfer to an array");
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/*
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* Handle open from generic layer.
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*
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* This is called by the diskslice code on first open in order to get the
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* basic device geometry paramters.
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*/
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static int
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aac_disk_open(struct disk *dp)
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{
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struct aac_disk *sc;
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debug_called(4);
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sc = (struct aac_disk *)dp->d_drv1;
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if (sc == NULL) {
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printf("aac_disk_open: No Softc\n");
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return (ENXIO);
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}
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/* check that the controller is up and running */
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if (sc->ad_controller->aac_state & AAC_STATE_SUSPEND) {
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printf("Controller Suspended controller state = 0x%x\n",
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sc->ad_controller->aac_state);
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return(ENXIO);
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}
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sc->ad_flags |= AAC_DISK_OPEN;
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return (0);
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}
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/*
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* Handle last close of the disk device.
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*/
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static int
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aac_disk_close(struct disk *dp)
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{
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struct aac_disk *sc;
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debug_called(4);
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sc = (struct aac_disk *)dp->d_drv1;
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if (sc == NULL)
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return (ENXIO);
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sc->ad_flags &= ~AAC_DISK_OPEN;
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return (0);
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}
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/*
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* Handle an I/O request.
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*/
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static void
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aac_disk_strategy(struct bio *bp)
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{
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struct aac_disk *sc;
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debug_called(4);
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sc = (struct aac_disk *)bp->bio_disk->d_drv1;
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/* bogus disk? */
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if (sc == NULL) {
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bp->bio_flags |= BIO_ERROR;
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bp->bio_error = EINVAL;
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biodone(bp);
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return;
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}
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/* do-nothing operation? */
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if (bp->bio_bcount == 0) {
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bp->bio_resid = bp->bio_bcount;
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biodone(bp);
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return;
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}
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/* perform accounting */
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/* pass the bio to the controller - it can work out who we are */
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mtx_lock(&sc->ad_controller->aac_io_lock);
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aac_submit_bio(bp);
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mtx_unlock(&sc->ad_controller->aac_io_lock);
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return;
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}
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/*
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* Map the S/G elements for doing a dump.
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*
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* XXX This does not handle >4GB of RAM. Fixing it is possible except on
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* adapters that cannot do 64bit s/g lists.
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*/
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static void
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aac_dump_map_sg(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
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{
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struct aac_fib *fib;
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struct aac_blockwrite *bw;
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struct aac_sg_table *sg;
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int i;
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fib = (struct aac_fib *)arg;
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bw = (struct aac_blockwrite *)&fib->data[0];
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sg = &bw->SgMap;
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if (sg != NULL) {
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sg->SgCount = nsegs;
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for (i = 0; i < nsegs; i++) {
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if (segs[i].ds_addr >= BUS_SPACE_MAXADDR_32BIT)
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return;
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sg->SgEntry[i].SgAddress = segs[i].ds_addr;
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sg->SgEntry[i].SgByteCount = segs[i].ds_len;
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}
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fib->Header.Size = nsegs * sizeof(struct aac_sg_entry);
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}
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}
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/*
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* Dump memory out to an array
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*
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* Send out one command at a time with up to AAC_MAXIO of data.
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*/
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static int
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aac_disk_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
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{
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struct aac_disk *ad;
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struct aac_softc *sc;
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struct aac_fib *fib;
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struct aac_blockwrite *bw;
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size_t len;
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int size;
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static bus_dmamap_t dump_datamap;
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static int first = 0;
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struct disk *dp;
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dp = arg;
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ad = dp->d_drv1;
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if (ad == NULL)
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return (EINVAL);
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sc= ad->ad_controller;
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if (!first) {
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first = 1;
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if (bus_dmamap_create(sc->aac_buffer_dmat, 0, &dump_datamap)) {
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printf("bus_dmamap_create failed\n");
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return (ENOMEM);
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}
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}
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/* Skip aac_alloc_sync_fib(). We don't want to mess with sleep locks */
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fib = &sc->aac_common->ac_sync_fib;
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bw = (struct aac_blockwrite *)&fib->data[0];
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while (length > 0) {
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len = (length > AAC_MAXIO) ? AAC_MAXIO : length;
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bw->Command = VM_CtBlockWrite;
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bw->ContainerId = ad->ad_container->co_mntobj.ObjectId;
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bw->BlockNumber = offset / AAC_BLOCK_SIZE;
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bw->ByteCount = len;
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bw->Stable = CUNSTABLE;
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/*
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* There really isn't any way to recover from errors or
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* resource shortages here. Oh well. Because of that, don't
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* bother trying to send the command from the callback; there
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* is too much required context.
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*/
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if (bus_dmamap_load(sc->aac_buffer_dmat, dump_datamap, virtual,
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len, aac_dump_map_sg, fib, 0) != 0)
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return (EIO);
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bus_dmamap_sync(sc->aac_buffer_dmat, dump_datamap,
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BUS_DMASYNC_PREWRITE);
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/* fib->Header.Size is set in aac_dump_map_sg */
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size = fib->Header.Size + sizeof(struct aac_blockwrite);
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if (aac_sync_fib(sc, ContainerCommand, 0, fib, size)) {
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printf("Error dumping block 0x%jx\n",
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(uintmax_t)physical);
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return (EIO);
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}
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length -= len;
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offset += len;
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virtual = (uint8_t *)virtual + len;
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}
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return (0);
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}
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/*
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* Handle completion of an I/O request.
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*/
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void
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aac_biodone(struct bio *bp)
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{
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struct aac_disk *sc;
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debug_called(4);
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sc = (struct aac_disk *)bp->bio_disk->d_drv1;
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if (bp->bio_flags & BIO_ERROR)
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disk_err(bp, "hard error", -1, 1);
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biodone(bp);
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}
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/*
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* Stub only.
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*/
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static int
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aac_disk_probe(device_t dev)
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{
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debug_called(2);
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return (0);
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}
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/*
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* Attach a unit to the controller.
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*/
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static int
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aac_disk_attach(device_t dev)
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{
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struct aac_disk *sc;
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debug_called(1);
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sc = (struct aac_disk *)device_get_softc(dev);
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/* initialise our softc */
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sc->ad_controller =
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(struct aac_softc *)device_get_softc(device_get_parent(dev));
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sc->ad_container = device_get_ivars(dev);
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sc->ad_dev = dev;
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/*
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* require that extended translation be enabled - other drivers read the
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* disk!
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*/
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sc->ad_size = sc->ad_container->co_mntobj.Capacity;
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if (sc->ad_size >= (2 * 1024 * 1024)) { /* 2GB */
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sc->ad_heads = 255;
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sc->ad_sectors = 63;
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} else if (sc->ad_size >= (1 * 1024 * 1024)) { /* 1GB */
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sc->ad_heads = 128;
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sc->ad_sectors = 32;
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} else {
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sc->ad_heads = 64;
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sc->ad_sectors = 32;
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}
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sc->ad_cylinders = (sc->ad_size / (sc->ad_heads * sc->ad_sectors));
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device_printf(dev, "%uMB (%u sectors)\n",
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sc->ad_size / ((1024 * 1024) / AAC_BLOCK_SIZE),
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sc->ad_size);
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/* attach a generic disk device to ourselves */
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sc->unit = device_get_unit(dev);
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sc->ad_disk = disk_alloc();
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sc->ad_disk->d_drv1 = sc;
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sc->ad_disk->d_name = "aacd";
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sc->ad_disk->d_maxsize = aac_iosize_max;
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sc->ad_disk->d_open = aac_disk_open;
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sc->ad_disk->d_close = aac_disk_close;
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sc->ad_disk->d_strategy = aac_disk_strategy;
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sc->ad_disk->d_dump = aac_disk_dump;
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sc->ad_disk->d_sectorsize = AAC_BLOCK_SIZE;
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sc->ad_disk->d_mediasize = (off_t)sc->ad_size * AAC_BLOCK_SIZE;
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sc->ad_disk->d_fwsectors = sc->ad_sectors;
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sc->ad_disk->d_fwheads = sc->ad_heads;
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sc->ad_disk->d_unit = sc->unit;
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disk_create(sc->ad_disk, DISK_VERSION);
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return (0);
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}
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/*
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* Disconnect ourselves from the system.
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*/
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static int
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aac_disk_detach(device_t dev)
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{
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struct aac_disk *sc;
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debug_called(2);
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sc = (struct aac_disk *)device_get_softc(dev);
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if (sc->ad_flags & AAC_DISK_OPEN)
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return(EBUSY);
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disk_destroy(sc->ad_disk);
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return(0);
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}
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