From: David Gibson <da...@gibson.dropbear.id.au>
This patch adds the necessary support for saving the state of the PAPR VIO
virtual SCSI device. This also saves and restores active SCSI requests.
[aik: implemented vscsi_req save/restore]
Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
Cc: David Gibson <da...@gibson.dropbear.id.au>
---
hw/scsi/spapr_vscsi.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 81 insertions(+), 1 deletion(-)
diff --git a/hw/scsi/spapr_vscsi.c b/hw/scsi/spapr_vscsi.c
index e2740fb..a86199b 100644
--- a/hw/scsi/spapr_vscsi.c
+++ b/hw/scsi/spapr_vscsi.c
@@ -578,6 +578,69 @@ static void vscsi_request_cancelled(SCSIRequest *sreq)
vscsi_put_req(req);
}
+static const VMStateDescription vmstate_spapr_vscsi_req = {
+ .name = "spapr_vscsi_req",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField []) {
+ VMSTATE_BUFFER(crq.raw, vscsi_req),
+ VMSTATE_BUFFER(iu.srp.reserved, vscsi_req),
+ VMSTATE_UINT32(qtag, vscsi_req),
+ VMSTATE_BOOL(active, vscsi_req),
+ VMSTATE_UINT32(data_len, vscsi_req),
+ VMSTATE_BOOL(writing, vscsi_req),
+ VMSTATE_UINT32(senselen, vscsi_req),
+ VMSTATE_BUFFER(sense, vscsi_req),
+ VMSTATE_UINT8(dma_fmt, vscsi_req),
+ VMSTATE_UINT16(local_desc, vscsi_req),
+ VMSTATE_UINT16(total_desc, vscsi_req),
+ VMSTATE_UINT16(cdb_offset, vscsi_req),
+ /*Restart SCSI request from the beginning for now */
+ /*VMSTATE_UINT16(cur_desc_num, vscsi_req),
+ VMSTATE_UINT16(cur_desc_offset, vscsi_req),*/
+ VMSTATE_END_OF_LIST()
+ },
+};
+
+static void vscsi_save_request(QEMUFile *f, SCSIRequest *sreq)
+{
+ vscsi_req *req = sreq->hba_private;
+ assert(req->active);
+
+ vmstate_save_state(f, &vmstate_spapr_vscsi_req, req);
+
+ dprintf("VSCSI: saving tag=%u, current desc#%d, offset=%x\n",
+ req->qtag, req->cur_desc_num, req->cur_desc_offset);
+}
+
+static void *vscsi_load_request(QEMUFile *f, SCSIRequest *sreq)
+{
+ SCSIBus *bus = sreq->bus;
+ VSCSIState *s = VIO_SPAPR_VSCSI_DEVICE(bus->qbus.parent);
+ vscsi_req *req;
+ int rc;
+
+ assert(sreq->tag < VSCSI_REQ_LIMIT);
+ req = &s->reqs[sreq->tag];
+ assert(!req->active);
+
+ memset(req, 0, sizeof(*req));
+ rc = vmstate_load_state(f, &vmstate_spapr_vscsi_req, req, 1);
+ if (rc) {
+ fprintf(stderr, "VSCSI: failed loading request tag#%u\n", sreq->tag);
+ return NULL;
+ }
+ assert(req->active);
+
+ req->sreq = scsi_req_ref(sreq);
+
+ dprintf("VSCSI: restoring tag=%u, current desc#%d, offset=%x\n",
+ req->qtag, req->cur_desc_num, req->cur_desc_offset);
+
+ return req;
+}
+
static void vscsi_process_login(VSCSIState *s, vscsi_req *req)
{
union viosrp_iu *iu = &req->iu;
@@ -932,7 +995,9 @@ static const struct SCSIBusInfo vscsi_scsi_info = {
.transfer_data = vscsi_transfer_data,
.complete = vscsi_command_complete,
- .cancel = vscsi_request_cancelled
+ .cancel = vscsi_request_cancelled,
+ .save_request = vscsi_save_request,
+ .load_request = vscsi_load_request,
};
static void spapr_vscsi_reset(VIOsPAPRDevice *dev)
@@ -991,6 +1056,20 @@ static Property spapr_vscsi_properties[] = {
DEFINE_PROP_END_OF_LIST(),
};
+static const VMStateDescription vmstate_spapr_vscsi = {
+ .name = "spapr_vscsi",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField []) {
+ VMSTATE_SPAPR_VIO(vdev, VSCSIState),
+ /* VSCSI state */
+ /* ???? */
+
+ VMSTATE_END_OF_LIST()
+ },
+};
+
static void spapr_vscsi_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@@ -1005,6 +1084,7 @@ static void spapr_vscsi_class_init(ObjectClass *klass,
void *data)
k->signal_mask = 0x00000001;
dc->props = spapr_vscsi_properties;
k->rtce_window_size = 0x10000000;
+ dc->vmsd = &vmstate_spapr_vscsi;
}
static const TypeInfo spapr_vscsi_info = {
--
1.8.0
