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authorJuan Quintela <quintela@redhat.com>2010-07-26 21:38:44 +0200
committerAnthony Liguori <aliguori@us.ibm.com>2010-07-26 16:19:51 -0500
commit50641c5ce258220fc63ba5be1afd1a37f023aba9 (patch)
tree94daed3438036d8665344a86a0036fbec2e32789 /hw/ide
parent811814bd2859ff272320f0c5765b0605f90ce7b3 (diff)
ide: fix migration in the middle of pio operation
Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw/ide')
-rw-r--r--hw/ide/core.c90
-rw-r--r--hw/ide/internal.h5
2 files changed, 94 insertions, 1 deletions
diff --git a/hw/ide/core.c b/hw/ide/core.c
index ccb7d329b1..db000831e8 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -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 */
+ }
}
};
diff --git a/hw/ide/internal.h b/hw/ide/internal.h
index 75745eee83..416554324c 100644
--- a/hw/ide/internal.h
+++ b/hw/ide/internal.h
@@ -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 */