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virtio-blk: add the virtio-blk device. 

Create virtio-blk which extends virtio-device, so it can be connected on
virtio-bus.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1363624648-16906-6-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
KONRAD Frederic 2013-03-18 17:37:22 +01:00 committed by Anthony Liguori
parent da3dcefa64
commit 1c028ddfb0
3 changed files with 115 additions and 12 deletions
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98
hw/virtio-blk.c
View File

@ -21,7 +21,11 @@
#ifdef __linux__
# include <scsi/sg.h>
#endif
#include "hw/virtio-bus.h"
/*
* Moving to QOM later in this series.
*/
static VirtIOBlock *to_virtio_blk(VirtIODevice *vdev)
{
return (VirtIOBlock *)vdev;
@ -620,9 +624,16 @@ static const BlockDevOps virtio_block_ops = {
.resize_cb = virtio_blk_resize,
};
VirtIODevice *virtio_blk_init(DeviceState *dev, VirtIOBlkConf *blk)
void virtio_blk_set_conf(DeviceState *dev, VirtIOBlkConf *blk)
{
VirtIOBlock *s;
VirtIOBlock *s = VIRTIO_BLK(dev);
memcpy(&(s->blk), blk, sizeof(struct VirtIOBlkConf));
}
static VirtIODevice *virtio_blk_common_init(DeviceState *dev,
VirtIOBlkConf *blk, VirtIOBlock **ps)
{
VirtIOBlock *s = *ps;
static int virtio_blk_id;
if (!blk->conf.bs) {
@ -639,9 +650,20 @@ VirtIODevice *virtio_blk_init(DeviceState *dev, VirtIOBlkConf *blk)
return NULL;
}
s = (VirtIOBlock *)virtio_common_init("virtio-blk", VIRTIO_ID_BLOCK,
sizeof(struct virtio_blk_config),
sizeof(VirtIOBlock));
/*
* We have two cases here: the old virtio-blk-pci device, and the
* refactored virtio-blk.
*/
if (s == NULL) {
/* virtio-blk-pci */
s = (VirtIOBlock *)virtio_common_init("virtio-blk", VIRTIO_ID_BLOCK,
sizeof(struct virtio_blk_config),
sizeof(VirtIOBlock));
} else {
/* virtio-blk */
virtio_init(VIRTIO_DEVICE(s), "virtio-blk", VIRTIO_ID_BLOCK,
sizeof(struct virtio_blk_config));
}
s->vdev.get_config = virtio_blk_update_config;
s->vdev.set_config = virtio_blk_set_config;
@ -675,6 +697,12 @@ VirtIODevice *virtio_blk_init(DeviceState *dev, VirtIOBlkConf *blk)
return &s->vdev;
}
VirtIODevice *virtio_blk_init(DeviceState *dev, VirtIOBlkConf *blk)
{
VirtIOBlock *s = NULL;
return virtio_blk_common_init(dev, blk, &s);
}
void virtio_blk_exit(VirtIODevice *vdev)
{
VirtIOBlock *s = to_virtio_blk(vdev);
@ -688,3 +716,63 @@ void virtio_blk_exit(VirtIODevice *vdev)
blockdev_mark_auto_del(s->bs);
virtio_cleanup(vdev);
}
static int virtio_blk_device_init(VirtIODevice *vdev)
{
DeviceState *qdev = DEVICE(vdev);
VirtIOBlock *s = VIRTIO_BLK(vdev);
VirtIOBlkConf *blk = &(s->blk);
if (virtio_blk_common_init(qdev, blk, &s) == NULL) {
return -1;
}
return 0;
}
static int virtio_blk_device_exit(DeviceState *dev)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIOBlock *s = VIRTIO_BLK(dev);
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
virtio_blk_data_plane_destroy(s->dataplane);
s->dataplane = NULL;
#endif
qemu_del_vm_change_state_handler(s->change);
unregister_savevm(s->qdev, "virtio-blk", s);
blockdev_mark_auto_del(s->bs);
virtio_common_cleanup(vdev);
return 0;
}
static Property virtio_blk_properties[] = {
DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlock, blk),
DEFINE_PROP_END_OF_LIST(),
};
static void virtio_blk_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
dc->exit = virtio_blk_device_exit;
dc->props = virtio_blk_properties;
vdc->init = virtio_blk_device_init;
vdc->get_config = virtio_blk_update_config;
vdc->set_config = virtio_blk_set_config;
vdc->get_features = virtio_blk_get_features;
vdc->set_status = virtio_blk_set_status;
vdc->reset = virtio_blk_reset;
}
static const TypeInfo virtio_device_info = {
.name = TYPE_VIRTIO_BLK,
.parent = TYPE_VIRTIO_DEVICE,
.instance_size = sizeof(VirtIOBlock),
.class_init = virtio_blk_class_init,
};
static void virtio_register_types(void)
{
type_register_static(&virtio_device_info);
}
type_init(virtio_register_types)

21
hw/virtio-blk.h
View File

@ -20,6 +20,10 @@
#include "dataplane/virtio-blk.h"
#endif
#define TYPE_VIRTIO_BLK "virtio-blk"
#define VIRTIO_BLK(obj) \
OBJECT_CHECK(VirtIOBlock, (obj), TYPE_VIRTIO_BLK)
/* from Linux's linux/virtio_blk.h */
/* The ID for virtio_block */
@ -130,4 +134,21 @@ typedef struct VirtIOBlock {
#define DEFINE_VIRTIO_BLK_FEATURES(_state, _field) \
DEFINE_VIRTIO_COMMON_FEATURES(_state, _field)
#ifdef __linux__
#define DEFINE_VIRTIO_BLK_PROPERTIES(_state, _field) \
DEFINE_BLOCK_PROPERTIES(_state, _field.conf), \
DEFINE_BLOCK_CHS_PROPERTIES(_state, _field.conf), \
DEFINE_PROP_STRING("serial", _state, _field.serial), \
DEFINE_PROP_BIT("config-wce", _state, _field.config_wce, 0, true), \
DEFINE_PROP_BIT("scsi", _state, _field.scsi, 0, true)
#else
#define DEFINE_VIRTIO_BLK_PROPERTIES(_state, _field) \
DEFINE_BLOCK_PROPERTIES(_state, _field.conf), \
DEFINE_BLOCK_CHS_PROPERTIES(_state, _field.conf), \
DEFINE_PROP_STRING("serial", _state, _field.serial), \
DEFINE_PROP_BIT("config-wce", _state, _field.config_wce, 0, true)
#endif /* __linux__ */
void virtio_blk_set_conf(DeviceState *dev, VirtIOBlkConf *blk);
#endif

8
hw/virtio-pci.c
View File

@ -1084,19 +1084,13 @@ static void virtio_rng_exit_pci(PCIDevice *pci_dev)
static Property virtio_blk_properties[] = {
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, blk.conf),
DEFINE_BLOCK_CHS_PROPERTIES(VirtIOPCIProxy, blk.conf),
DEFINE_PROP_STRING("serial", VirtIOPCIProxy, blk.serial),
#ifdef __linux__
DEFINE_PROP_BIT("scsi", VirtIOPCIProxy, blk.scsi, 0, true),
#endif
DEFINE_PROP_BIT("config-wce", VirtIOPCIProxy, blk.config_wce, 0, true),
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
DEFINE_PROP_BIT("x-data-plane", VirtIOPCIProxy, blk.data_plane, 0, false),
#endif
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOPCIProxy, blk),
DEFINE_PROP_END_OF_LIST(),
};