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-rw-r--r--sys/dev/ata/ata-disk.c738
1 files changed, 738 insertions, 0 deletions
diff --git a/sys/dev/ata/ata-disk.c b/sys/dev/ata/ata-disk.c
new file mode 100644
index 0000000..ec25bf3
--- /dev/null
+++ b/sys/dev/ata/ata-disk.c
@@ -0,0 +1,738 @@
+/*-
+ * Copyright (c) 1998,1999 Søren Schmidt
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#include "apm.h"
+#include "opt_global.h"
+#include "opt_ata.h"
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/proc.h>
+#include <sys/malloc.h>
+#include <sys/buf.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/disk.h>
+#include <sys/devicestat.h>
+#include <sys/cons.h>
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_page.h>
+#include <vm/vm_object.h>
+#include <machine/clock.h>
+#include <machine/md_var.h>
+#if NAPM > 0
+#include <machine/apm_bios.h>
+#endif
+#include <dev/ata/ata-all.h>
+#include <dev/ata/ata-disk.h>
+
+static d_open_t adopen;
+static d_strategy_t adstrategy;
+static d_dump_t addump;
+
+static struct cdevsw ad_cdevsw = {
+ /* open */ adopen,
+ /* close */ nullclose,
+ /* read */ physread,
+ /* write */ physwrite,
+ /* ioctl */ noioctl,
+ /* poll */ nopoll,
+ /* mmap */ nommap,
+ /* strategy */ adstrategy,
+ /* name */ "ad",
+ /* maj */ 116,
+ /* dump */ addump,
+ /* psize */ nopsize,
+ /* flags */ D_DISK,
+ /* bmaj */ 30,
+};
+static struct cdevsw addisk_cdevsw;
+static struct cdevsw fakewd_cdevsw;
+static struct cdevsw fakewddisk_cdevsw;
+
+/* prototypes */
+static void ad_attach(void *);
+static int32_t ad_getparam(struct ad_softc *);
+static void ad_start(struct ad_softc *);
+static void ad_timeout(struct ad_request *);
+static int32_t ad_version(u_int16_t);
+static void ad_drvinit(void);
+
+/* internal vars */
+static struct intr_config_hook *ad_attach_hook;
+MALLOC_DEFINE(M_AD, "AD driver", "ATA disk driver");
+
+/* defines */
+#define AD_MAX_RETRIES 3
+
+static __inline int
+apiomode(struct ata_params *ap)
+{
+ if (ap->atavalid & 2) {
+ if (ap->apiomodes & 2) return 4;
+ if (ap->apiomodes & 1) return 3;
+ }
+ return -1;
+}
+
+static __inline int
+wdmamode(struct ata_params *ap)
+{
+ if (ap->atavalid & 2) {
+ if (ap->wdmamodes & 4) return 2;
+ if (ap->wdmamodes & 2) return 1;
+ if (ap->wdmamodes & 1) return 0;
+ }
+ return -1;
+}
+
+static __inline int
+udmamode(struct ata_params *ap)
+{
+ if ((ap->atavalid & 4) && ad_version(ap->versmajor) >= 3) {
+ if (ap->udmamodes & 0x10) return (ap->cblid ? 4 : 2);
+ if (ap->udmamodes & 0x08) return (ap->cblid ? 3 : 2);
+ if (ap->udmamodes & 0x04) return 2;
+ if (ap->udmamodes & 0x02) return 1;
+ if (ap->udmamodes & 0x01) return 0;
+ }
+ return -1;
+}
+
+static void
+ad_attach(void *notused)
+{
+ struct ad_softc *adp;
+ int32_t ctlr, dev, secsperint;
+ int8_t model_buf[40+1];
+ int8_t revision_buf[8+1];
+ dev_t dev1;
+ static int32_t adnlun = 0;
+
+ /* now, run through atadevices and look for ATA disks */
+ for (ctlr=0; ctlr<MAXATA; ctlr++) {
+ if (!atadevices[ctlr]) continue;
+ for (dev=0; dev<2; dev++) {
+ if (atadevices[ctlr]->devices &
+ (dev ? ATA_ATA_SLAVE : ATA_ATA_MASTER)) {
+#ifdef ATA_STATIC_ID
+ adnlun = dev + ctlr * 2;
+#endif
+ if (!(adp = malloc(sizeof(struct ad_softc),
+ M_AD, M_NOWAIT))) {
+ printf("ad%d: failed to allocate driver storage\n", adnlun);
+ continue;
+ }
+ bzero(adp, sizeof(struct ad_softc));
+ adp->controller = atadevices[ctlr];
+ adp->unit = (dev == 0) ? ATA_MASTER : ATA_SLAVE;
+ adp->lun = adnlun++;
+ if (ad_getparam(adp)) {
+ free(adp, M_AD);
+ continue;
+ }
+ adp->controller->dev_softc[(adp->unit==ATA_MASTER)?0:1] = adp;
+ adp->heads = adp->ata_parm->heads;
+ adp->sectors = adp->ata_parm->sectors;
+ adp->total_secs =
+ adp->ata_parm->cylinders * adp->heads * adp->sectors;
+ if (adp->ata_parm->cylinders == 16383 &&
+ adp->total_secs < adp->ata_parm->lbasize) {
+ adp->total_secs = adp->ata_parm->lbasize;
+ }
+ if (adp->ata_parm->atavalid & ATA_FLAG_54_58 &&
+ adp->ata_parm->lbasize)
+ adp->flags |= AD_F_LBA_ENABLED;
+
+ /* use multiple sectors/interrupt if device supports it */
+ adp->transfersize = DEV_BSIZE;
+ secsperint = max(1, min(adp->ata_parm->nsecperint, 16));
+ if (!ata_command(adp->controller, adp->unit, ATA_C_SET_MULTI,
+ 0, 0, 0, secsperint, 0, ATA_WAIT_INTR) &&
+ ata_wait(adp->controller, adp->unit, ATA_S_READY) >= 0)
+ adp->transfersize *= secsperint;
+
+ /* enable read/write cacheing if not default on device */
+ if (ata_command(adp->controller, adp->unit, ATA_C_SETFEATURES,
+ 0, 0, 0, 0, ATA_C_F_ENAB_RCACHE, ATA_WAIT_INTR))
+ printf("ad%d: enabling readahead cache failed\n", adp->lun);
+
+ if (ata_command(adp->controller, adp->unit, ATA_C_SETFEATURES,
+ 0, 0, 0, 0, ATA_C_F_ENAB_WCACHE, ATA_WAIT_INTR))
+ printf("ad%d: enabling write cache failed\n", adp->lun);
+
+ /* use DMA if drive & controller supports it */
+ if (!ata_dmainit(adp->controller, adp->unit,
+ apiomode(adp->ata_parm),
+ wdmamode(adp->ata_parm),
+ udmamode(adp->ata_parm)))
+ adp->flags |= AD_F_DMA_ENABLED;
+
+ /* use tagged queueing if supported (not yet) */
+ if ((adp->num_tags = (adp->ata_parm->queuelen & 0x1f) + 1))
+ adp->flags |= AD_F_TAG_ENABLED;
+
+ bpack(adp->ata_parm->model, model_buf, sizeof(model_buf));
+ bpack(adp->ata_parm->revision, revision_buf,
+ sizeof(revision_buf));
+
+ if (bootverbose)
+ printf("ad%d: piomode=%d dmamode=%d udmamode=%d cblid=%d\n",
+ adp->lun, apiomode(adp->ata_parm),
+ wdmamode(adp->ata_parm), udmamode(adp->ata_parm),
+ adp->ata_parm->cblid);
+
+ printf("ad%d: <%s/%s> ATA-%d disk at ata%d as %s\n",
+ adp->lun, model_buf, revision_buf,
+ ad_version(adp->ata_parm->versmajor), ctlr,
+ (adp->unit == ATA_MASTER) ? "master" : "slave ");
+
+ printf("ad%d: %luMB (%u sectors), "
+ "%u cyls, %u heads, %u S/T, %u B/S\n",
+ adp->lun, adp->total_secs / ((1024L * 1024L)/DEV_BSIZE),
+ adp->total_secs,
+ adp->total_secs / (adp->heads * adp->sectors),
+ adp->heads, adp->sectors, DEV_BSIZE);
+
+ printf("ad%d: %d secs/int, %d depth queue, %s\n",
+ adp->lun, adp->transfersize / DEV_BSIZE, adp->num_tags,
+ ata_mode2str(adp->controller->mode[
+ (adp->unit == ATA_MASTER) ? 0 : 1]));
+
+ devstat_add_entry(&adp->stats, "ad", adp->lun, DEV_BSIZE,
+ DEVSTAT_NO_ORDERED_TAGS,
+ DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_IDE,
+ DEVSTAT_PRIORITY_DISK);
+
+ dev1 = disk_create(adp->lun, &adp->disk, 0, &ad_cdevsw,
+ &addisk_cdevsw);
+ dev1->si_drv1 = adp;
+ dev1->si_iosize_max = 256 * DEV_BSIZE;
+
+ dev1 = disk_create(adp->lun, &adp->disk, 0, &fakewd_cdevsw,
+ &fakewddisk_cdevsw);
+ dev1->si_drv1 = adp;
+ dev1->si_iosize_max = 256 * DEV_BSIZE;
+
+ bufq_init(&adp->queue);
+ }
+ }
+ }
+ config_intrhook_disestablish(ad_attach_hook);
+}
+
+static int32_t
+ad_getparam(struct ad_softc *adp)
+{
+ struct ata_params *ata_parm;
+ int8_t buffer[DEV_BSIZE];
+
+ /* select drive */
+ outb(adp->controller->ioaddr + ATA_DRIVE, ATA_D_IBM | adp->unit);
+ DELAY(1);
+ if (ata_command(adp->controller, adp->unit, ATA_C_ATA_IDENTIFY,
+ 0, 0, 0, 0, 0, ATA_WAIT_INTR))
+ return -1;
+ if (ata_wait(adp->controller, adp->unit,
+ ATA_S_READY | ATA_S_DSC | ATA_S_DRQ))
+ return -1;
+ insw(adp->controller->ioaddr + ATA_DATA, buffer,
+ sizeof(buffer)/sizeof(int16_t));
+ ata_parm = malloc(sizeof(struct ata_params), M_AD, M_NOWAIT);
+ if (!ata_parm)
+ return -1;
+ bcopy(buffer, ata_parm, sizeof(struct ata_params));
+ bswap(ata_parm->model, sizeof(ata_parm->model));
+ btrim(ata_parm->model, sizeof(ata_parm->model));
+ bswap(ata_parm->revision, sizeof(ata_parm->revision));
+ btrim(ata_parm->revision, sizeof(ata_parm->revision));
+ adp->ata_parm = ata_parm;
+ return 0;
+}
+
+static int
+adopen(dev_t dev, int32_t flags, int32_t fmt, struct proc *p)
+{
+ struct ad_softc *adp = dev->si_drv1;
+ struct disklabel *dl;
+
+ dl = &adp->disk.d_label;
+ bzero(dl, sizeof *dl);
+ dl->d_secsize = DEV_BSIZE;
+ dl->d_nsectors = adp->sectors;
+ dl->d_ntracks = adp->heads;
+ dl->d_ncylinders = adp->total_secs / (adp->heads * adp->sectors);
+ dl->d_secpercyl = adp->sectors * adp->heads;
+ dl->d_secperunit = adp->total_secs;
+ return 0;
+}
+
+static void
+adstrategy(struct buf *bp)
+{
+ struct ad_softc *adp = bp->b_dev->si_drv1;
+ int32_t s;
+
+#ifdef AD_DEBUG
+ printf("adstrategy: entered count=%d\n", bp->b_bcount);
+#endif
+ s = splbio();
+ bufqdisksort(&adp->queue, bp);
+ ad_start(adp);
+ splx(s);
+#ifdef AD_DEBUG
+ printf("adstrategy: leaving\n");
+#endif
+}
+
+int
+addump(dev_t dev)
+{
+ struct ad_softc *adp = dev->si_drv1;
+ struct ad_request request;
+ u_int count, blkno, secsize;
+ vm_offset_t addr = 0;
+ int error;
+
+ if ((error = disk_dumpcheck(dev, &count, &blkno, &secsize)))
+ return error;
+
+ if (!adp)
+ return ENXIO;
+
+ ata_reinit(adp->controller);
+ adp->flags &= ~AD_F_DMA_ENABLED;
+
+ while (count > 0) {
+ DELAY(1000);
+ if (is_physical_memory(addr))
+ pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
+ trunc_page(addr), VM_PROT_READ, TRUE);
+ else
+ pmap_enter(kernel_pmap, (vm_offset_t)CADDR1,
+ trunc_page(0), VM_PROT_READ, TRUE);
+
+ bzero(&request, sizeof(struct ad_request));
+ request.device = adp;
+ request.blockaddr = blkno;
+ request.bytecount = PAGE_SIZE;
+ request.data = CADDR1;
+
+ while (request.bytecount > 0) {
+ ad_transfer(&request);
+ if (request.flags & AR_F_ERROR)
+ return EIO;
+ request.donecount += request.currentsize;
+ DELAY(20);
+ }
+
+ if (addr % (1024 * 1024) == 0) {
+#ifdef HW_WDOG
+ if (wdog_tickler)
+ (*wdog_tickler)();
+#endif
+ printf("%ld ", (long)(count * DEV_BSIZE) / (1024 * 1024));
+ }
+
+ blkno += howmany(PAGE_SIZE, secsize);
+ count -= howmany(PAGE_SIZE, secsize);
+ addr += PAGE_SIZE;
+ if (cncheckc() != -1)
+ return EINTR;
+ }
+
+ if (ata_wait(adp->controller, adp->unit, ATA_S_READY | ATA_S_DSC) < 0)
+ printf("addump: timeout waiting for final ready\n");
+
+ return 0;
+}
+
+static void
+ad_start(struct ad_softc *adp)
+{
+ struct buf *bp = bufq_first(&adp->queue);
+ struct ad_request *request;
+
+#ifdef AD_DEBUG
+ printf("ad_start:\n");
+#endif
+ if (!bp)
+ return;
+
+ if (!(request = malloc(sizeof(struct ad_request), M_AD, M_NOWAIT))) {
+ printf("ad_start: out of memory\n");
+ return;
+ }
+
+ /* setup request */
+ bzero(request, sizeof(struct ad_request));
+ request->device = adp;
+ request->bp = bp;
+ request->blockaddr = bp->b_pblkno;
+ request->bytecount = bp->b_bcount;
+ request->data = bp->b_data;
+ request->flags = (bp->b_flags & B_READ) ? AR_F_READ : 0;
+
+ /* remove from drive queue */
+ bufq_remove(&adp->queue, bp);
+
+ /* link onto controller queue */
+ TAILQ_INSERT_TAIL(&adp->controller->ata_queue, request, chain);
+
+ /* try to start controller */
+ if (adp->controller->active == ATA_IDLE)
+ ata_start(adp->controller);
+}
+
+void
+ad_transfer(struct ad_request *request)
+{
+ struct ad_softc *adp;
+ u_int32_t blkno, secsprcyl;
+ u_int32_t cylinder, head, sector, count, cmd;
+
+ /* get request params */
+ adp = request->device;
+
+ /* calculate transfer details */
+ blkno = request->blockaddr + (request->donecount / DEV_BSIZE);
+
+#ifdef AD_DEBUG
+ printf("ad_transfer: blkno=%d\n", blkno);
+#endif
+ if (request->donecount == 0) {
+
+ /* start timeout for this transfer */
+ if (panicstr)
+ request->timeout_handle.callout = NULL;
+ else
+ request->timeout_handle =
+ timeout((timeout_t*)ad_timeout, request, 10 * hz);
+
+ /* setup transfer parameters */
+ count = howmany(request->bytecount, DEV_BSIZE);
+ if (count > 256) {
+ count = 256;
+ printf("ad_transfer: count=%d not supported\n", count);
+ }
+
+ if (adp->flags & AD_F_LBA_ENABLED) {
+ sector = (blkno >> 0) & 0xff;
+ cylinder = (blkno >> 8) & 0xffff;
+ head = ((blkno >> 24) & 0xf) | ATA_D_LBA;
+ }
+ else {
+ secsprcyl = adp->sectors * adp->heads;
+ cylinder = blkno / secsprcyl;
+ head = (blkno % secsprcyl) / adp->sectors;
+ sector = (blkno % adp->sectors) + 1;
+ }
+
+ /* setup first transfer length */
+ request->currentsize = min(request->bytecount, adp->transfersize);
+
+ devstat_start_transaction(&adp->stats);
+
+ /* does this drive & transfer work with DMA ? */
+ request->flags &= ~AR_F_DMA_USED;
+ if ((adp->flags & AD_F_DMA_ENABLED) &&
+ !ata_dmasetup(adp->controller, adp->unit,
+ (void *)request->data, request->bytecount,
+ (request->flags & AR_F_READ))) {
+ request->flags |= AR_F_DMA_USED;
+ cmd = request->flags & AR_F_READ ? ATA_C_READ_DMA : ATA_C_WRITE_DMA;
+ request->currentsize = request->bytecount;
+ }
+ /* does this drive support multi sector transfers ? */
+ else if (request->currentsize > DEV_BSIZE)
+ cmd = request->flags & AR_F_READ?ATA_C_READ_MULTI:ATA_C_WRITE_MULTI;
+ else
+ cmd = request->flags & AR_F_READ ? ATA_C_READ : ATA_C_WRITE;
+
+ if (ata_command(adp->controller, adp->unit, cmd,
+ cylinder, head, sector, count, 0, ATA_IMMEDIATE))
+ printf("ad%d: wouldn't take transfer command\n", adp->lun);
+ }
+
+ /* if this is a DMA transaction start it, return and wait for interrupt */
+ if (request->flags & AR_F_DMA_USED) {
+ ata_dmastart(adp->controller);
+#ifdef AD_DEBUG
+ printf("ad_transfer: return waiting for DMA interrupt\n");
+#endif
+ return;
+ }
+
+ /* calculate this transfer length */
+ request->currentsize = min(request->bytecount, adp->transfersize);
+
+ /* if this is a PIO read operation, return and wait for interrupt */
+ if (request->flags & AR_F_READ) {
+#ifdef AD_DEBUG
+ printf("ad_transfer: return waiting for PIO read interrupt\n");
+#endif
+ return;
+ }
+
+ /* ready to write PIO data ? */
+ if (ata_wait(adp->controller, adp->unit,
+ (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) < 0)
+ printf("ad_transfer: timeout waiting for DRQ");
+
+ /* output the data */
+#ifdef ATA_16BIT_ONLY
+ outsw(adp->controller->ioaddr + ATA_DATA,
+ (void *)((uintptr_t)request->data + request->donecount),
+ request->currentsize / sizeof(int16_t));
+#else
+ outsl(adp->controller->ioaddr + ATA_DATA,
+ (void *)((uintptr_t)request->data + request->donecount),
+ request->currentsize / sizeof(int32_t));
+#endif
+ request->bytecount -= request->currentsize;
+#ifdef AD_DEBUG
+ printf("ad_transfer: return wrote data\n");
+#endif
+}
+
+int32_t
+ad_interrupt(struct ad_request *request)
+{
+ struct ad_softc *adp = request->device;
+ int32_t dma_stat = 0;
+
+ /* finish DMA transfer */
+ if (request->flags & AR_F_DMA_USED)
+ dma_stat = ata_dmadone(adp->controller);
+
+ /* get drive status */
+ if (ata_wait(adp->controller, adp->unit, 0) < 0)
+ printf("ad_interrupt: timeout waiting for status");
+
+ if (adp->controller->status & ATA_S_CORR)
+ printf("ad%d: soft error ECC corrected\n", adp->lun);
+
+ if ((adp->controller->status & ATA_S_ERROR) ||
+ (request->flags & AR_F_DMA_USED && dma_stat != ATA_BMSTAT_INTERRUPT)) {
+oops:
+ printf("ad%d: %s %s ERROR blk# %d", adp->lun,
+ (adp->controller->error & ATA_E_ICRC) ? "UDMA CRC" : "HARD",
+ (request->flags & AR_F_READ) ? "READ" : "WRITE",
+ request->blockaddr + (request->donecount / DEV_BSIZE));
+
+ /* if this is a UDMA CRC error, reinject request */
+ if (adp->controller->error & ATA_E_ICRC) {
+ untimeout((timeout_t *)ad_timeout, request,request->timeout_handle);
+
+ if (request->retries++ < AD_MAX_RETRIES)
+ printf(" retrying\n");
+ else {
+ ata_dmainit(adp->controller, adp->unit,
+ apiomode(adp->ata_parm), -1, -1);
+ adp->flags &= ~AD_F_DMA_ENABLED;
+ printf(" falling back to PIO mode\n");
+ }
+ TAILQ_INSERT_HEAD(&adp->controller->ata_queue, request, chain);
+ return ATA_OP_FINISHED;
+ }
+
+ /* if using DMA, try once again in PIO mode */
+ if (request->flags & AR_F_DMA_USED) {
+ untimeout((timeout_t *)ad_timeout, request,request->timeout_handle);
+ ata_dmainit(adp->controller, adp->unit,
+ apiomode(adp->ata_parm), -1, -1);
+ request->flags |= AR_F_FORCE_PIO;
+ adp->flags &= ~AD_F_DMA_ENABLED;
+ TAILQ_INSERT_HEAD(&adp->controller->ata_queue, request, chain);
+ return ATA_OP_FINISHED;
+ }
+
+ request->flags |= AR_F_ERROR;
+ printf(" status=%02x error=%02x\n",
+ adp->controller->status, adp->controller->error);
+ }
+
+ /* if we arrived here with forced PIO mode, DMA doesn't work right */
+ if (request->flags & AR_F_FORCE_PIO) {
+ printf("ad%d: DMA problem encountered, fallback to PIO mode\n",
+ adp->lun);
+ }
+
+ /* if this was a PIO read operation, get the data */
+ if (!(request->flags & AR_F_DMA_USED) &&
+ ((request->flags & (AR_F_READ | AR_F_ERROR)) == AR_F_READ)) {
+
+ /* ready to receive data? */
+ if ((adp->controller->status & (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ))
+ != (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ))
+ printf("ad_interrupt: read interrupt arrived early");
+
+ if (ata_wait(adp->controller, adp->unit,
+ (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) != 0) {
+ printf("ad_interrupt: read error detected late");
+ goto oops;
+ }
+
+ /* data ready, read in */
+#ifdef ATA_16BIT_ONLY
+ insw(adp->controller->ioaddr + ATA_DATA,
+ (void *)((uintptr_t)request->data + request->donecount),
+ request->currentsize / sizeof(int16_t));
+#else
+ insl(adp->controller->ioaddr + ATA_DATA,
+ (void *)((uintptr_t)request->data + request->donecount),
+ request->currentsize / sizeof(int32_t));
+#endif
+ request->bytecount -= request->currentsize;
+#ifdef AD_DEBUG
+ printf("ad_interrupt: read in data\n");
+#endif
+ }
+
+ /* if this was a DMA operation finish up */
+ if ((request->flags & AR_F_DMA_USED) && !(request->flags & AR_F_ERROR))
+ request->bytecount -= request->currentsize;
+
+ /* finish up this tranfer, check for more work on this buffer */
+ if (adp->controller->active == ATA_ACTIVE_ATA) {
+ if (request->flags & AR_F_ERROR) {
+ request->bp->b_error = EIO;
+ request->bp->b_flags |= B_ERROR;
+ }
+ else {
+ request->donecount += request->currentsize;
+#ifdef AD_DEBUG
+ printf("ad_interrupt: %s cmd OK\n",
+ (request->flags & AR_F_READ) ? "read" : "write");
+#endif
+ if (request->bytecount > 0) {
+ ad_transfer(request);
+ return ATA_OP_CONTINUES;
+ }
+ }
+
+ request->bp->b_resid = request->bytecount;
+ devstat_end_transaction_buf(&adp->stats, request->bp);
+ biodone(request->bp);
+ }
+ /* disarm timeout for this transfer */
+ untimeout((timeout_t *)ad_timeout, request, request->timeout_handle);
+
+ free(request, M_AD);
+ ad_start(adp);
+#ifdef AD_DEBUG
+ printf("ad_interrupt: completed\n");
+#endif
+ return ATA_OP_FINISHED;
+}
+
+void
+ad_reinit(struct ad_softc *adp)
+{
+ /* reinit disk parameters */
+ ata_command(adp->controller, adp->unit, ATA_C_SET_MULTI, 0, 0, 0,
+ adp->transfersize / DEV_BSIZE, 0, ATA_IMMEDIATE);
+ ata_wait(adp->controller, adp->unit, ATA_S_READY);
+ ata_dmainit(adp->controller, adp->unit, apiomode(adp->ata_parm),
+ wdmamode(adp->ata_parm), udmamode(adp->ata_parm));
+}
+
+static void
+ad_timeout(struct ad_request *request)
+{
+ struct ad_softc *adp = request->device;
+
+ adp->controller->running = NULL;
+ printf("ad%d: ad_timeout: lost disk contact - resetting\n", adp->lun);
+
+ if (request->flags & AR_F_DMA_USED) {
+ ata_dmadone(adp->controller);
+ if (request->retries == AD_MAX_RETRIES) {
+ ata_dmainit(adp->controller, adp->unit,
+ apiomode(adp->ata_parm), -1, -1);
+ adp->flags &= ~AD_F_DMA_ENABLED;
+ printf("ad%d: ad_timeout: trying fallback to PIO mode\n", adp->lun);
+ request->retries = 0;
+ }
+ }
+
+ /* if retries still permit, reinject this request */
+ if (request->retries++ < AD_MAX_RETRIES)
+ TAILQ_INSERT_HEAD(&adp->controller->ata_queue, request, chain);
+ else {
+ /* retries all used up, return error */
+ request->bp->b_error = EIO;
+ request->bp->b_flags |= B_ERROR;
+ devstat_end_transaction_buf(&adp->stats, request->bp);
+ biodone(request->bp);
+ free(request, M_AD);
+ }
+ ata_reinit(adp->controller);
+}
+
+static int32_t
+ad_version(u_int16_t version)
+{
+ int32_t bit;
+
+ if (version == 0xffff)
+ return 0;
+ for (bit = 15; bit >= 0; bit--)
+ if (version & (1<<bit))
+ return bit;
+ return 0;
+}
+
+static void
+ad_drvinit(void)
+{
+ fakewd_cdevsw = ad_cdevsw;
+ fakewd_cdevsw.d_maj = 3;
+ fakewd_cdevsw.d_bmaj = 0;
+ fakewd_cdevsw.d_name = "wd";
+
+ /* register callback for when interrupts are enabled */
+ if (!(ad_attach_hook =
+ (struct intr_config_hook *)malloc(sizeof(struct intr_config_hook),
+ M_TEMP, M_NOWAIT))) {
+ printf("ad: malloc attach_hook failed\n");
+ return;
+ }
+ bzero(ad_attach_hook, sizeof(struct intr_config_hook));
+
+ ad_attach_hook->ich_func = ad_attach;
+ if (config_intrhook_establish(ad_attach_hook) != 0) {
+ printf("ad: config_intrhook_establish failed\n");
+ free(ad_attach_hook, M_TEMP);
+ }
+}
+
+SYSINIT(addev, SI_SUB_DRIVERS, SI_ORDER_SECOND, ad_drvinit, NULL)
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