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pseries: savevm support for PAPR virtual SCSI

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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 <aik@ozlabs.ru>
Message-id: 1374175984-8930-8-git-send-email-aliguori@us.ibm.com
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
David Gibson 2013-07-18 14:33:00 -05:00 committed by Anthony Liguori
parent 8ca8a17c9a
commit 1168ec7da1
1 changed files with 81 additions and 1 deletions
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82
hw/scsi/spapr_vscsi.c
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@ -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)
@ -996,6 +1061,20 @@ 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);
@ -1010,6 +1089,7 @@ 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 = {