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dma: keep a device alive while it has SGLists

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Reviewed-by: Anthony Liguori <aliguori@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-06-03 14:17:19 +02:00
parent cac3c384bb
commit f487b677c2
7 changed files with 25 additions and 12 deletions
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6
dma-helpers.c
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@ -34,13 +34,16 @@ int dma_memory_set(AddressSpace *as, dma_addr_t addr, uint8_t c, dma_addr_t len)
return error;
}
void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint, AddressSpace *as)
void qemu_sglist_init(QEMUSGList *qsg, DeviceState *dev, int alloc_hint,
AddressSpace *as)
{
qsg->sg = g_malloc(alloc_hint * sizeof(ScatterGatherEntry));
qsg->nsg = 0;
qsg->nalloc = alloc_hint;
qsg->size = 0;
qsg->as = as;
qsg->dev = dev;
object_ref(OBJECT(dev));
}
void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len)
@ -57,6 +60,7 @@ void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len)
void qemu_sglist_destroy(QEMUSGList *qsg)
{
object_unref(OBJECT(qsg->dev));
g_free(qsg->sg);
memset(qsg, 0, sizeof(*qsg));
}