haraldwolff/qemu-patch-raspberry4
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scsi-disk: add migration support

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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2011-12-15 07:24:47 -05:00
parent 56b1fc4823
commit 43b978b932
1 changed files with 55 additions and 4 deletions
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59
hw/scsi-disk.c
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@ -111,12 +111,12 @@ static void scsi_cancel_io(SCSIRequest *req)
r->req.aiocb = NULL;
}
static uint32_t scsi_init_iovec(SCSIDiskReq *r)
static uint32_t scsi_init_iovec(SCSIDiskReq *r, size_t size)
{
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, r->req.dev);
if (!r->iov.iov_base) {
r->buflen = SCSI_DMA_BUF_SIZE;
r->buflen = size;
r->iov.iov_base = qemu_blockalign(s->qdev.conf.bs, r->buflen);
}
r->iov.iov_len = MIN(r->sector_count * 512, r->buflen);
@ -124,6 +124,35 @@ static uint32_t scsi_init_iovec(SCSIDiskReq *r)
return r->qiov.size / 512;
}
static void scsi_disk_save_request(QEMUFile *f, SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
qemu_put_be64s(f, &r->sector);
qemu_put_be32s(f, &r->sector_count);
qemu_put_be32s(f, &r->buflen);
if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
qemu_put_buffer(f, r->iov.iov_base, r->iov.iov_len);
}
}
static void scsi_disk_load_request(QEMUFile *f, SCSIRequest *req)
{
SCSIDiskReq *r = DO_UPCAST(SCSIDiskReq, req, req);
qemu_get_be64s(f, &r->sector);
qemu_get_be32s(f, &r->sector_count);
qemu_get_be32s(f, &r->buflen);
if (r->buflen) {
scsi_init_iovec(r, r->buflen);
if (r->req.cmd.mode == SCSI_XFER_TO_DEV) {
qemu_get_buffer(f, r->iov.iov_base, r->iov.iov_len);
}
}
qemu_iovec_init_external(&r->qiov, &r->iov, 1);
}
static void scsi_dma_complete(void *opaque, int ret)
{
SCSIDiskReq *r = (SCSIDiskReq *)opaque;
@ -241,7 +270,7 @@ static void scsi_read_data(SCSIRequest *req)
r->req.aiocb = dma_bdrv_read(s->qdev.conf.bs, r->req.sg, r->sector,
scsi_dma_complete, r);
} else {
n = scsi_init_iovec(r);
n = scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
bdrv_acct_start(s->qdev.conf.bs, &r->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_READ);
r->req.aiocb = bdrv_aio_readv(s->qdev.conf.bs, r->sector, &r->qiov, n,
scsi_read_complete, r);
@ -316,7 +345,7 @@ static void scsi_write_complete(void * opaque, int ret)
if (r->sector_count == 0) {
scsi_req_complete(&r->req, GOOD);
} else {
scsi_init_iovec(r);
scsi_init_iovec(r, SCSI_DMA_BUF_SIZE);
DPRINTF("Write complete tag=0x%x more=%d\n", r->req.tag, r->qiov.size);
scsi_req_data(&r->req, r->qiov.size);
}
@ -1621,6 +1650,8 @@ static const SCSIReqOps scsi_disk_reqops = {
.write_data = scsi_write_data,
.cancel_io = scsi_cancel_io,
.get_buf = scsi_get_buf,
.load_request = scsi_disk_load_request,
.save_request = scsi_disk_save_request,
};
static SCSIRequest *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun,
@ -1755,6 +1786,22 @@ static Property scsi_hd_properties[] = {
DEFINE_PROP_END_OF_LIST(),
};
static const VMStateDescription vmstate_scsi_disk_state = {
.name = "scsi-disk",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_SCSI_DEVICE(qdev, SCSIDiskState),
VMSTATE_BOOL(media_changed, SCSIDiskState),
VMSTATE_BOOL(media_event, SCSIDiskState),
VMSTATE_BOOL(eject_request, SCSIDiskState),
VMSTATE_BOOL(tray_open, SCSIDiskState),
VMSTATE_BOOL(tray_locked, SCSIDiskState),
VMSTATE_END_OF_LIST()
}
};
static void scsi_hd_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@ -1768,6 +1815,7 @@ static void scsi_hd_class_initfn(ObjectClass *klass, void *data)
dc->desc = "virtual SCSI disk";
dc->reset = scsi_disk_reset;
dc->props = scsi_hd_properties;
dc->vmsd = &vmstate_scsi_disk_state;
}
static TypeInfo scsi_hd_info = {
@ -1795,6 +1843,7 @@ static void scsi_cd_class_initfn(ObjectClass *klass, void *data)
dc->desc = "virtual SCSI CD-ROM";
dc->reset = scsi_disk_reset;
dc->props = scsi_cd_properties;
dc->vmsd = &vmstate_scsi_disk_state;
}
static TypeInfo scsi_cd_info = {
@ -1822,6 +1871,7 @@ static void scsi_block_class_initfn(ObjectClass *klass, void *data)
dc->desc = "SCSI block device passthrough";
dc->reset = scsi_disk_reset;
dc->props = scsi_block_properties;
dc->vmsd = &vmstate_scsi_disk_state;
}
static TypeInfo scsi_block_info = {
@ -1851,6 +1901,7 @@ static void scsi_disk_class_initfn(ObjectClass *klass, void *data)
dc->desc = "virtual SCSI disk or CD-ROM (legacy)";
dc->reset = scsi_disk_reset;
dc->props = scsi_disk_properties;
dc->vmsd = &vmstate_scsi_disk_state;
}
static TypeInfo scsi_disk_info = {