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dbdma: warn when using unassigned channel

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With this, it's easier to know if a guest uses an invalid and/or unimplemented
DMA channel.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Hervé Poussineau 2016-02-25 13:02:11 +01:00 • committed by David Gibson
parent cba0e7796b
commit 2d7d06d847
1 changed files with 23 additions and 2 deletions
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25
hw/misc/macio/mac_dbdma.c
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@ -557,11 +557,13 @@ void DBDMA_register_channel(void *dbdma, int nchan, qemu_irq irq,
DBDMA_DPRINTF("DBDMA_register_channel 0x%x\n", nchan); DBDMA_DPRINTF("DBDMA_register_channel 0x%x\n", nchan);
assert(rw);
assert(flush);
ch->irq = irq; ch->irq = irq;
ch->rw = rw; ch->rw = rw;
ch->flush = flush; ch->flush = flush;
ch->io.opaque = opaque; ch->io.opaque = opaque;
ch->io.channel = ch;
} }
static void static void
@ -775,6 +777,20 @@ static void dbdma_reset(void *opaque)
memset(s->channels[i].regs, 0, DBDMA_SIZE); memset(s->channels[i].regs, 0, DBDMA_SIZE);
} }
static void dbdma_unassigned_rw(DBDMA_io *io)
{
DBDMA_channel *ch = io->channel;
qemu_log_mask(LOG_GUEST_ERROR, "%s: use of unassigned channel %d\n",
__func__, ch->channel);
}
static void dbdma_unassigned_flush(DBDMA_io *io)
{
DBDMA_channel *ch = io->channel;
qemu_log_mask(LOG_GUEST_ERROR, "%s: use of unassigned channel %d\n",
__func__, ch->channel);
}
void* DBDMA_init (MemoryRegion **dbdma_mem) void* DBDMA_init (MemoryRegion **dbdma_mem)
{ {
DBDMAState *s; DBDMAState *s;
@ -784,8 +800,13 @@ void* DBDMA_init (MemoryRegion **dbdma_mem)
for (i = 0; i < DBDMA_CHANNELS; i++) { for (i = 0; i < DBDMA_CHANNELS; i++) {
DBDMA_io *io = &s->channels[i].io; DBDMA_io *io = &s->channels[i].io;
DBDMA_channel *ch = &s->channels[i];
qemu_iovec_init(&io->iov, 1); qemu_iovec_init(&io->iov, 1);
s->channels[i].channel = i;
ch->rw = dbdma_unassigned_rw;
ch->flush = dbdma_unassigned_flush;
ch->channel = i;
ch->io.channel = ch;
} }
memory_region_init_io(&s->mem, NULL, &dbdma_ops, s, "dbdma", 0x1000); memory_region_init_io(&s->mem, NULL, &dbdma_ops, s, "dbdma", 0x1000);