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Add kernel dumping support. Works fine with sdhci controller driver.

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This commit is contained in:
Alexander Motin 2009-02-17 19:17:25 +00:00
parent bea2dca299
commit a1fda318a8
1 changed files with 30 additions and 1 deletions
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31
sys/dev/mmc/mmcsd.c
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@ -91,6 +91,8 @@ static int mmcsd_detach(device_t dev);
static int mmcsd_open(struct disk *dp);
static int mmcsd_close(struct disk *dp);
static void mmcsd_strategy(struct bio *bp);
static int mmcsd_dump(void *arg, void *virtual, vm_offset_t physical,
off_t offset, size_t length);
static void mmcsd_task(void *arg);
static const char *mmcsd_card_name(device_t dev);
@ -130,7 +132,7 @@ mmcsd_attach(device_t dev)
d->d_open = mmcsd_open;
d->d_close = mmcsd_close;
d->d_strategy = mmcsd_strategy;
// d->d_dump = mmcsd_dump; Need polling mmc layer
d->d_dump = mmcsd_dump;
d->d_name = "mmcsd";
d->d_drv1 = sc;
d->d_maxsize = 4*1024*1024; /* Maximum defined SD card AU size. */
@ -415,6 +417,33 @@ mmcsd_delete(struct mmcsd_softc *sc, struct bio *bp)
return (end);
}
static int
mmcsd_dump(void *arg, void *virtual, vm_offset_t physical,
off_t offset, size_t length)
{
struct disk *disk = arg;
struct mmcsd_softc *sc = (struct mmcsd_softc *)disk->d_drv1;
device_t dev = sc->dev;
struct bio bp;
daddr_t block, end;
/* length zero is special and really means flush buffers to media */
if (!length)
return (0);
bzero(&bp, sizeof(struct bio));
bp.bio_disk = disk;
bp.bio_pblkno = offset / disk->d_sectorsize;
bp.bio_bcount = length;
bp.bio_data = virtual;
bp.bio_cmd = BIO_WRITE;
end = bp.bio_pblkno + bp.bio_bcount / sc->disk->d_sectorsize;
MMCBUS_ACQUIRE_BUS(device_get_parent(dev), dev);
block = mmcsd_rw(sc, &bp);
MMCBUS_RELEASE_BUS(device_get_parent(dev), dev);
return ((end < block) ? EIO : 0);
}
static void
mmcsd_task(void *arg)
{