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ide: fix migration in the middle of pio operation

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Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Juan Quintela 2010-07-26 21:38:44 +02:00 committed by Anthony Liguori
parent 811814bd28
commit 50641c5ce2
2 changed files with 94 additions and 1 deletions
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90
hw/ide/core.c
View file

@ -2664,6 +2664,7 @@ static void ide_init1(IDEBus *bus, int unit)
s->unit = unit;
s->drive_serial = drive_serial++;
s->io_buffer = qemu_blockalign(s->bs, IDE_DMA_BUF_SECTORS*512 + 4);
s->io_buffer_total_len = IDE_DMA_BUF_SECTORS*512 + 4;
s->smart_selftest_data = qemu_blockalign(s->bs, 512);
s->sector_write_timer = qemu_new_timer(vm_clock,
ide_sector_write_timer_cb, s);
@ -2726,6 +2727,26 @@ static bool is_identify_set(void *opaque, int version_id)
return s->identify_set != 0;
}
static EndTransferFunc* transfer_end_table[] = {
ide_sector_read,
ide_sector_write,
ide_transfer_stop,
ide_atapi_cmd_reply_end,
ide_atapi_cmd,
ide_dummy_transfer_stop,
};
static int transfer_end_table_idx(EndTransferFunc *fn)
{
int i;
for (i = 0; i < ARRAY_SIZE(transfer_end_table); i++)
if (transfer_end_table[i] == fn)
return i;
return -1;
}
static int ide_drive_post_load(void *opaque, int version_id)
{
IDEState *s = opaque;
@ -2739,6 +2760,66 @@ static int ide_drive_post_load(void *opaque, int version_id)
return 0;
}
static int ide_drive_pio_post_load(void *opaque, int version_id)
{
IDEState *s = opaque;
if (s->end_transfer_fn_idx < 0 ||
s->end_transfer_fn_idx > ARRAY_SIZE(transfer_end_table)) {
return -EINVAL;
}
s->end_transfer_func = transfer_end_table[s->end_transfer_fn_idx];
s->data_ptr = s->io_buffer + s->cur_io_buffer_offset;
s->data_end = s->data_ptr + s->cur_io_buffer_len;
return 0;
}
static void ide_drive_pio_pre_save(void *opaque)
{
IDEState *s = opaque;
int idx;
s->cur_io_buffer_offset = s->data_ptr - s->io_buffer;
s->cur_io_buffer_len = s->data_end - s->data_ptr;
idx = transfer_end_table_idx(s->end_transfer_func);
if (idx == -1) {
fprintf(stderr, "%s: invalid end_transfer_func for DRQ_STAT\n",
__func__);
s->end_transfer_fn_idx = 2;
} else {
s->end_transfer_fn_idx = idx;
}
}
static bool ide_drive_pio_state_needed(void *opaque)
{
IDEState *s = opaque;
return (s->status & DRQ_STAT) != 0;
}
const VMStateDescription vmstate_ide_drive_pio_state = {
.name = "ide_drive/pio_state",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.pre_save = ide_drive_pio_pre_save,
.post_load = ide_drive_pio_post_load,
.fields = (VMStateField []) {
VMSTATE_INT32(req_nb_sectors, IDEState),
VMSTATE_VARRAY_INT32(io_buffer, IDEState, io_buffer_total_len, 1,
vmstate_info_uint8, uint8_t),
VMSTATE_INT32(cur_io_buffer_offset, IDEState),
VMSTATE_INT32(cur_io_buffer_len, IDEState),
VMSTATE_UINT8(end_transfer_fn_idx, IDEState),
VMSTATE_INT32(elementary_transfer_size, IDEState),
VMSTATE_INT32(packet_transfer_size, IDEState),
VMSTATE_END_OF_LIST()
}
};
const VMStateDescription vmstate_ide_drive = {
.name = "ide_drive",
.version_id = 3,
@ -2766,8 +2847,15 @@ const VMStateDescription vmstate_ide_drive = {
VMSTATE_UINT8(sense_key, IDEState),
VMSTATE_UINT8(asc, IDEState),
VMSTATE_UINT8_V(cdrom_changed, IDEState, 3),
/* XXX: if a transfer is pending, we do not save it yet */
VMSTATE_END_OF_LIST()
},
.subsections = (VMStateSubsection []) {
{
.vmsd = &vmstate_ide_drive_pio_state,
.needed = ide_drive_pio_state_needed,
}, {
/* empty */
}
}
};

5
hw/ide/internal.h
View file

@ -419,6 +419,11 @@ struct IDEState {
uint8_t *data_ptr;
uint8_t *data_end;
uint8_t *io_buffer;
/* PIO save/restore */
int32_t io_buffer_total_len;
int cur_io_buffer_offset;
int cur_io_buffer_len;
uint8_t end_transfer_fn_idx;
QEMUTimer *sector_write_timer; /* only used for win2k install hack */
uint32_t irq_count; /* counts IRQs when using win2k install hack */
/* CF-ATA extended error */