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ide: move restart callback to common code

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With BMDMA specific excised from the restart functions,
create a HBA-agnostic restart callback to be shared
between the different HBAs.

Change the callback registered with the vmstate_change
handler to always point to ide_restart_cb instead of
relying on the IDEDMAOps.restart_cb() member.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1424708286-16483-7-git-send-email-jsnow@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-02-23 11:17:55 -05:00 • committed by Kevin Wolf
parent d34fceda8f
commit 9898586d89
4 changed files with 81 additions and 81 deletions
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80
hw/ide/core.c
View file

@ -2314,6 +2314,10 @@ static int ide_nop_int(IDEDMA *dma, int x)
return 0;
}
static void ide_nop(IDEDMA *dma)
{
}
static int32_t ide_nop_int32(IDEDMA *dma, int x)
{
return 0;
@ -2325,14 +2329,88 @@ static void ide_nop_restart(void *opaque, int x, RunState y)
static const IDEDMAOps ide_dma_nop_ops = {
.prepare_buf = ide_nop_int32,
.restart_dma = ide_nop,
.rw_buf = ide_nop_int,
.set_unit = ide_nop_int,
.restart_cb = ide_nop_restart,
};
static void ide_restart_dma(IDEState *s, enum ide_dma_cmd dma_cmd)
{
s->bus->dma->ops->restart_dma(s->bus->dma);
s->io_buffer_index = 0;
s->io_buffer_size = 0;
s->dma_cmd = dma_cmd;
ide_start_dma(s, ide_dma_cb);
}
static void ide_restart_bh(void *opaque)
{
IDEBus *bus = opaque;
IDEState *s;
bool is_read;
int error_status;
qemu_bh_delete(bus->bh);
bus->bh = NULL;
error_status = bus->error_status;
if (bus->error_status == 0) {
return;
}
s = idebus_active_if(bus);
is_read = (bus->error_status & IDE_RETRY_READ) != 0;
/* The error status must be cleared before resubmitting the request: The
* request may fail again, and this case can only be distinguished if the
* called function can set a new error status. */
bus->error_status = 0;
if (error_status & IDE_RETRY_DMA) {
if (error_status & IDE_RETRY_TRIM) {
ide_restart_dma(s, IDE_DMA_TRIM);
} else {
ide_restart_dma(s, is_read ? IDE_DMA_READ : IDE_DMA_WRITE);
}
} else if (error_status & IDE_RETRY_PIO) {
if (is_read) {
ide_sector_read(s);
} else {
ide_sector_write(s);
}
} else if (error_status & IDE_RETRY_FLUSH) {
ide_flush_cache(s);
} else {
/*
* We've not got any bits to tell us about ATAPI - but
* we do have the end_transfer_func that tells us what
* we're trying to do.
*/
if (s->end_transfer_func == ide_atapi_cmd) {
ide_atapi_dma_restart(s);
}
}
}
static void ide_restart_cb(void *opaque, int running, RunState state)
{
IDEBus *bus = opaque;
if (!running)
return;
if (!bus->bh) {
bus->bh = qemu_bh_new(ide_restart_bh, bus);
qemu_bh_schedule(bus->bh);
}
}
void ide_register_restart_cb(IDEBus *bus)
{
qemu_add_vm_change_state_handler(bus->dma->ops->restart_cb, bus);
if (bus->dma->ops->restart_dma) {
qemu_add_vm_change_state_handler(ide_restart_cb, bus);
}
}
static IDEDMA ide_dma_nop = {