[qemu.git] / hw / scsi / vhost-scsi.c

/*
 * vhost_scsi host device
 *
 * Copyright IBM, Corp. 2011
 *
 * Authors:
 *  Stefan Hajnoczi   <[email protected]>
 *
 * Changes for QEMU mainline + tcm_vhost kernel upstream:
 *  Nicholas Bellinger <[email protected]>
 *
 * This work is licensed under the terms of the GNU LGPL, version 2 or later.
 * See the COPYING.LIB file in the top-level directory.
 *
 */

#include <sys/ioctl.h>
#include "config.h"
#include "qemu/queue.h"
#include "monitor/monitor.h"
#include "migration/migration.h"
#include "hw/virtio/vhost-scsi.h"
#include "hw/virtio/vhost.h"
#include "hw/virtio/virtio-scsi.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio-access.h"
#include "hw/fw-path-provider.h"

/* Features supported by host kernel. */
static const int kernel_feature_bits[] = {
    VIRTIO_F_NOTIFY_ON_EMPTY,
    VIRTIO_RING_F_INDIRECT_DESC,
    VIRTIO_RING_F_EVENT_IDX,
    VIRTIO_SCSI_F_HOTPLUG,
    VHOST_INVALID_FEATURE_BIT
};

static int vhost_scsi_set_endpoint(VHostSCSI *s)
{
    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
    const VhostOps *vhost_ops = s->dev.vhost_ops;
    struct vhost_scsi_target backend;
    int ret;

    memset(&backend, 0, sizeof(backend));
    pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
    ret = vhost_ops->vhost_call(&s->dev, VHOST_SCSI_SET_ENDPOINT, &backend);
    if (ret < 0) {
        return -errno;
    }
    return 0;
}

static void vhost_scsi_clear_endpoint(VHostSCSI *s)
{
    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
    struct vhost_scsi_target backend;
    const VhostOps *vhost_ops = s->dev.vhost_ops;

    memset(&backend, 0, sizeof(backend));
    pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
    vhost_ops->vhost_call(&s->dev, VHOST_SCSI_CLEAR_ENDPOINT, &backend);
}

static int vhost_scsi_start(VHostSCSI *s)
{
    int ret, abi_version, i;
    VirtIODevice *vdev = VIRTIO_DEVICE(s);
    BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
    const VhostOps *vhost_ops = s->dev.vhost_ops;

    if (!k->set_guest_notifiers) {
        error_report("binding does not support guest notifiers");
        return -ENOSYS;
    }

    ret = vhost_ops->vhost_call(&s->dev,
                                VHOST_SCSI_GET_ABI_VERSION, &abi_version);
    if (ret < 0) {
        return -errno;
    }
    if (abi_version > VHOST_SCSI_ABI_VERSION) {
        error_report("vhost-scsi: The running tcm_vhost kernel abi_version:"
                     " %d is greater than vhost_scsi userspace supports: %d, please"
                     " upgrade your version of QEMU", abi_version,
                     VHOST_SCSI_ABI_VERSION);
        return -ENOSYS;
    }

    ret = vhost_dev_enable_notifiers(&s->dev, vdev);
    if (ret < 0) {
        return ret;
    }

    s->dev.acked_features = vdev->guest_features;
    ret = vhost_dev_start(&s->dev, vdev);
    if (ret < 0) {
        error_report("Error start vhost dev");
        goto err_notifiers;
    }

    ret = vhost_scsi_set_endpoint(s);
    if (ret < 0) {
        error_report("Error set vhost-scsi endpoint");
        goto err_vhost_stop;
    }

    ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, true);
    if (ret < 0) {
        error_report("Error binding guest notifier");
        goto err_endpoint;
    }

    /* guest_notifier_mask/pending not used yet, so just unmask
     * everything here.  virtio-pci will do the right thing by
     * enabling/disabling irqfd.
     */
    for (i = 0; i < s->dev.nvqs; i++) {
        vhost_virtqueue_mask(&s->dev, vdev, i, false);
    }

    return ret;

err_endpoint:
    vhost_scsi_clear_endpoint(s);
err_vhost_stop:
    vhost_dev_stop(&s->dev, vdev);
err_notifiers:
    vhost_dev_disable_notifiers(&s->dev, vdev);
    return ret;
}

static void vhost_scsi_stop(VHostSCSI *s)
{
    VirtIODevice *vdev = VIRTIO_DEVICE(s);
    BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
    VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
    int ret = 0;

    if (k->set_guest_notifiers) {
        ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false);
        if (ret < 0) {
                error_report("vhost guest notifier cleanup failed: %d", ret);
        }
    }
    assert(ret >= 0);

    vhost_scsi_clear_endpoint(s);
    vhost_dev_stop(&s->dev, vdev);
    vhost_dev_disable_notifiers(&s->dev, vdev);
}

static uint64_t vhost_scsi_get_features(VirtIODevice *vdev,
                                        uint64_t features)
{
    VHostSCSI *s = VHOST_SCSI(vdev);

    return vhost_get_features(&s->dev, kernel_feature_bits, features);
}

static void vhost_scsi_set_config(VirtIODevice *vdev,
                                  const uint8_t *config)
{
    VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config;
    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);

    if ((uint32_t) virtio_ldl_p(vdev, &scsiconf->sense_size) != vs->sense_size ||
        (uint32_t) virtio_ldl_p(vdev, &scsiconf->cdb_size) != vs->cdb_size) {
        error_report("vhost-scsi does not support changing the sense data and CDB sizes");
        exit(1);
    }
}

static void vhost_scsi_set_status(VirtIODevice *vdev, uint8_t val)
{
    VHostSCSI *s = (VHostSCSI *)vdev;
    bool start = (val & VIRTIO_CONFIG_S_DRIVER_OK);

    if (s->dev.started == start) {
        return;
    }

    if (start) {
        int ret;

        ret = vhost_scsi_start(s);
        if (ret < 0) {
            error_report("virtio-scsi: unable to start vhost: %s",
                         strerror(-ret));

            /* There is no userspace virtio-scsi fallback so exit */
            exit(1);
        }
    } else {
        vhost_scsi_stop(s);
    }
}

static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
{
}

static void vhost_scsi_realize(DeviceState *dev, Error **errp)
{
    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
    VHostSCSI *s = VHOST_SCSI(dev);
    Error *err = NULL;
    int vhostfd = -1;
    int ret;

    if (!vs->conf.wwpn) {
        error_setg(errp, "vhost-scsi: missing wwpn");
        return;
    }

    if (vs->conf.vhostfd) {
        vhostfd = monitor_fd_param(cur_mon, vs->conf.vhostfd, &err);
        if (vhostfd == -1) {
            error_setg(errp, "vhost-scsi: unable to parse vhostfd: %s",
                       error_get_pretty(err));
            error_free(err);
            return;
        }
    } else {
        vhostfd = open("/dev/vhost-scsi", O_RDWR);
        if (vhostfd < 0) {
            error_setg(errp, "vhost-scsi: open vhost char device failed: %s",
                       strerror(errno));
            return;
        }
    }

    virtio_scsi_common_realize(dev, &err, vhost_dummy_handle_output,
                               vhost_dummy_handle_output,
                               vhost_dummy_handle_output);
    if (err != NULL) {
        error_propagate(errp, err);
        close(vhostfd);
        return;
    }

    s->dev.nvqs = VHOST_SCSI_VQ_NUM_FIXED + vs->conf.num_queues;
    s->dev.vqs = g_new(struct vhost_virtqueue, s->dev.nvqs);
    s->dev.vq_index = 0;
    s->dev.backend_features = 0;

    ret = vhost_dev_init(&s->dev, (void *)(uintptr_t)vhostfd,
                         VHOST_BACKEND_TYPE_KERNEL);
    if (ret < 0) {
        error_setg(errp, "vhost-scsi: vhost initialization failed: %s",
                   strerror(-ret));
        return;
    }

    /* At present, channel and lun both are 0 for bootable vhost-scsi disk */
    s->channel = 0;
    s->lun = 0;
    /* Note: we can also get the minimum tpgt from kernel */
    s->target = vs->conf.boot_tpgt;

    error_setg(&s->migration_blocker,
            "vhost-scsi does not support migration");
    migrate_add_blocker(s->migration_blocker);
}

static void vhost_scsi_unrealize(DeviceState *dev, Error **errp)
{
    VirtIODevice *vdev = VIRTIO_DEVICE(dev);
    VHostSCSI *s = VHOST_SCSI(dev);

    migrate_del_blocker(s->migration_blocker);
    error_free(s->migration_blocker);

    /* This will stop vhost backend. */
    vhost_scsi_set_status(vdev, 0);

    g_free(s->dev.vqs);

    virtio_scsi_common_unrealize(dev, errp);
}

/*
 * Implementation of an interface to adjust firmware path
 * for the bootindex property handling.
 */
static char *vhost_scsi_get_fw_dev_path(FWPathProvider *p, BusState *bus,
                                        DeviceState *dev)
{
    VHostSCSI *s = VHOST_SCSI(dev);
    /* format: channel@channel/vhost-scsi@target,lun */
    return g_strdup_printf("channel@%x/%s@%x,%x", s->channel,
                           qdev_fw_name(dev), s->target, s->lun);
}

static Property vhost_scsi_properties[] = {
    DEFINE_PROP_STRING("vhostfd", VHostSCSI, parent_obj.conf.vhostfd),
    DEFINE_PROP_STRING("wwpn", VHostSCSI, parent_obj.conf.wwpn),
    DEFINE_PROP_UINT32("boot_tpgt", VHostSCSI, parent_obj.conf.boot_tpgt, 0),
    DEFINE_PROP_UINT32("num_queues", VHostSCSI, parent_obj.conf.num_queues, 1),
    DEFINE_PROP_UINT32("max_sectors", VHostSCSI, parent_obj.conf.max_sectors,
                                                 0xFFFF),
    DEFINE_PROP_UINT32("cmd_per_lun", VHostSCSI, parent_obj.conf.cmd_per_lun,
                                                 128),
    DEFINE_PROP_END_OF_LIST(),
};

static void vhost_scsi_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
    FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);

    dc->props = vhost_scsi_properties;
    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
    vdc->realize = vhost_scsi_realize;
    vdc->unrealize = vhost_scsi_unrealize;
    vdc->get_features = vhost_scsi_get_features;
    vdc->set_config = vhost_scsi_set_config;
    vdc->set_status = vhost_scsi_set_status;
    fwc->get_dev_path = vhost_scsi_get_fw_dev_path;
}

static void vhost_scsi_instance_init(Object *obj)
{
    VHostSCSI *dev = VHOST_SCSI(obj);

    device_add_bootindex_property(obj, &dev->bootindex, "bootindex", NULL,
                                  DEVICE(dev), NULL);
}

static const TypeInfo vhost_scsi_info = {
    .name = TYPE_VHOST_SCSI,
    .parent = TYPE_VIRTIO_SCSI_COMMON,
    .instance_size = sizeof(VHostSCSI),
    .class_init = vhost_scsi_class_init,
    .instance_init = vhost_scsi_instance_init,
    .interfaces = (InterfaceInfo[]) {
        { TYPE_FW_PATH_PROVIDER },
        { }
    },
};

static void virtio_register_types(void)
{
    type_register_static(&vhost_scsi_info);
}

type_init(virtio_register_types)
Commit	Line	Data
5e9be92d NB	1	/*
	2	* vhost_scsi host device
	3	*
	4	* Copyright IBM, Corp. 2011
	5	*
	6	* Authors:
	7	* Stefan Hajnoczi <[email protected]>
	8	*
	9	* Changes for QEMU mainline + tcm_vhost kernel upstream:
	10	* Nicholas Bellinger <[email protected]>
	11	*
	12	* This work is licensed under the terms of the GNU LGPL, version 2 or later.
	13	* See the COPYING.LIB file in the top-level directory.
	14	*
	15	*/
	16
	17	#include <sys/ioctl.h>
	18	#include "config.h"
	19	#include "qemu/queue.h"
	20	#include "monitor/monitor.h"
	21	#include "migration/migration.h"
	22	#include "hw/virtio/vhost-scsi.h"
	23	#include "hw/virtio/vhost.h"
	24	#include "hw/virtio/virtio-scsi.h"
1c819449	25	#include "hw/virtio/virtio-bus.h"
7ce04255	26	#include "hw/virtio/virtio-access.h"
1956cf6f	27	#include "hw/fw-path-provider.h"
5e9be92d	28
2e6d46d7 NN	29	/* Features supported by host kernel. */
	30	static const int kernel_feature_bits[] = {
	31	VIRTIO_F_NOTIFY_ON_EMPTY,
	32	VIRTIO_RING_F_INDIRECT_DESC,
	33	VIRTIO_RING_F_EVENT_IDX,
	34	VIRTIO_SCSI_F_HOTPLUG,
	35	VHOST_INVALID_FEATURE_BIT
	36	};
	37
5e9be92d NB	38	static int vhost_scsi_set_endpoint(VHostSCSI *s)
	39	{
	40	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
24d1eb33	41	const VhostOps *vhost_ops = s->dev.vhost_ops;
5e9be92d NB	42	struct vhost_scsi_target backend;
	43	int ret;
	44
	45	memset(&backend, 0, sizeof(backend));
	46	pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
24d1eb33	47	ret = vhost_ops->vhost_call(&s->dev, VHOST_SCSI_SET_ENDPOINT, &backend);
5e9be92d NB	48	if (ret < 0) {
	49	return -errno;
	50	}
	51	return 0;
	52	}
	53
	54	static void vhost_scsi_clear_endpoint(VHostSCSI *s)
	55	{
	56	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
	57	struct vhost_scsi_target backend;
24d1eb33	58	const VhostOps *vhost_ops = s->dev.vhost_ops;
5e9be92d NB	59
	60	memset(&backend, 0, sizeof(backend));
	61	pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
24d1eb33	62	vhost_ops->vhost_call(&s->dev, VHOST_SCSI_CLEAR_ENDPOINT, &backend);
5e9be92d NB	63	}
	64
	65	static int vhost_scsi_start(VHostSCSI *s)
	66	{
	67	int ret, abi_version, i;
	68	VirtIODevice *vdev = VIRTIO_DEVICE(s);
1c819449 FK	69	BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
1c819449 FK	70	VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
24d1eb33	71	const VhostOps *vhost_ops = s->dev.vhost_ops;
5e9be92d	72
1c819449	73	if (!k->set_guest_notifiers) {
5e9be92d NB	74	error_report("binding does not support guest notifiers");
	75	return -ENOSYS;
	76	}
	77
24d1eb33 NN	78	ret = vhost_ops->vhost_call(&s->dev,
24d1eb33 NN	79	VHOST_SCSI_GET_ABI_VERSION, &abi_version);
5e9be92d NB	80	if (ret < 0) {
	81	return -errno;
	82	}
	83	if (abi_version > VHOST_SCSI_ABI_VERSION) {
	84	error_report("vhost-scsi: The running tcm_vhost kernel abi_version:"
	85	" %d is greater than vhost_scsi userspace supports: %d, please"
f6a16175	86	" upgrade your version of QEMU", abi_version,
5e9be92d NB	87	VHOST_SCSI_ABI_VERSION);
	88	return -ENOSYS;
	89	}
	90
	91	ret = vhost_dev_enable_notifiers(&s->dev, vdev);
	92	if (ret < 0) {
	93	return ret;
	94	}
	95
	96	s->dev.acked_features = vdev->guest_features;
	97	ret = vhost_dev_start(&s->dev, vdev);
	98	if (ret < 0) {
	99	error_report("Error start vhost dev");
	100	goto err_notifiers;
	101	}
	102
	103	ret = vhost_scsi_set_endpoint(s);
	104	if (ret < 0) {
	105	error_report("Error set vhost-scsi endpoint");
	106	goto err_vhost_stop;
	107	}
	108
1c819449	109	ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, true);
5e9be92d NB	110	if (ret < 0) {
	111	error_report("Error binding guest notifier");
	112	goto err_endpoint;
	113	}
	114
	115	/* guest_notifier_mask/pending not used yet, so just unmask
	116	* everything here. virtio-pci will do the right thing by
	117	* enabling/disabling irqfd.
	118	*/
	119	for (i = 0; i < s->dev.nvqs; i++) {
	120	vhost_virtqueue_mask(&s->dev, vdev, i, false);
	121	}
	122
	123	return ret;
	124
	125	err_endpoint:
	126	vhost_scsi_clear_endpoint(s);
	127	err_vhost_stop:
	128	vhost_dev_stop(&s->dev, vdev);
	129	err_notifiers:
	130	vhost_dev_disable_notifiers(&s->dev, vdev);
	131	return ret;
	132	}
	133
	134	static void vhost_scsi_stop(VHostSCSI *s)
	135	{
	136	VirtIODevice *vdev = VIRTIO_DEVICE(s);
1c819449 FK	137	BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
1c819449 FK	138	VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
5e9be92d NB	139	int ret = 0;
5e9be92d NB	140
0e22a2d1	141	if (k->set_guest_notifiers) {
1c819449	142	ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false);
5e9be92d	143	if (ret < 0) {
f6a16175	144	error_report("vhost guest notifier cleanup failed: %d", ret);
5e9be92d NB	145	}
	146	}
	147	assert(ret >= 0);
	148
	149	vhost_scsi_clear_endpoint(s);
	150	vhost_dev_stop(&s->dev, vdev);
	151	vhost_dev_disable_notifiers(&s->dev, vdev);
	152	}
	153
019a3edb GH	154	static uint64_t vhost_scsi_get_features(VirtIODevice *vdev,
019a3edb GH	155	uint64_t features)
5e9be92d NB	156	{
	157	VHostSCSI *s = VHOST_SCSI(vdev);
	158
2e6d46d7	159	return vhost_get_features(&s->dev, kernel_feature_bits, features);
5e9be92d NB	160	}
	161
	162	static void vhost_scsi_set_config(VirtIODevice *vdev,
	163	const uint8_t *config)
	164	{
	165	VirtIOSCSIConfig scsiconf = (VirtIOSCSIConfig )config;
	166	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
	167
7ce04255 PB	168	if ((uint32_t) virtio_ldl_p(vdev, &scsiconf->sense_size) != vs->sense_size \|\|
7ce04255 PB	169	(uint32_t) virtio_ldl_p(vdev, &scsiconf->cdb_size) != vs->cdb_size) {
5e9be92d NB	170	error_report("vhost-scsi does not support changing the sense data and CDB sizes");
	171	exit(1);
	172	}
	173	}
	174
	175	static void vhost_scsi_set_status(VirtIODevice *vdev, uint8_t val)
	176	{
	177	VHostSCSI s = (VHostSCSI )vdev;
	178	bool start = (val & VIRTIO_CONFIG_S_DRIVER_OK);
	179
	180	if (s->dev.started == start) {
	181	return;
	182	}
	183
	184	if (start) {
	185	int ret;
	186
	187	ret = vhost_scsi_start(s);
	188	if (ret < 0) {
f6a16175	189	error_report("virtio-scsi: unable to start vhost: %s",
5e9be92d NB	190	strerror(-ret));
	191
	192	/* There is no userspace virtio-scsi fallback so exit */
	193	exit(1);
	194	}
	195	} else {
	196	vhost_scsi_stop(s);
	197	}
	198	}
	199
91d670fb ML	200	static void vhost_dummy_handle_output(VirtIODevice vdev, VirtQueue vq)
	201	{
	202	}
	203
71a6520b	204	static void vhost_scsi_realize(DeviceState dev, Error *errp)
5e9be92d	205	{
71a6520b AF	206	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
	207	VHostSCSI *s = VHOST_SCSI(dev);
	208	Error *err = NULL;
5e9be92d NB	209	int vhostfd = -1;
	210	int ret;
	211
	212	if (!vs->conf.wwpn) {
71a6520b AF	213	error_setg(errp, "vhost-scsi: missing wwpn");
71a6520b AF	214	return;
5e9be92d NB	215	}
	216
	217	if (vs->conf.vhostfd) {
1677f4c6	218	vhostfd = monitor_fd_param(cur_mon, vs->conf.vhostfd, &err);
5e9be92d	219	if (vhostfd == -1) {
248337e1 MA	220	error_setg(errp, "vhost-scsi: unable to parse vhostfd: %s",
	221	error_get_pretty(err));
	222	error_free(err);
71a6520b	223	return;
5e9be92d	224	}
81647a65 NN	225	} else {
	226	vhostfd = open("/dev/vhost-scsi", O_RDWR);
	227	if (vhostfd < 0) {
	228	error_setg(errp, "vhost-scsi: open vhost char device failed: %s",
	229	strerror(errno));
	230	return;
	231	}
5e9be92d NB	232	}
5e9be92d NB	233
91d670fb ML	234	virtio_scsi_common_realize(dev, &err, vhost_dummy_handle_output,
	235	vhost_dummy_handle_output,
	236	vhost_dummy_handle_output);
71a6520b AF	237	if (err != NULL) {
71a6520b AF	238	error_propagate(errp, err);
b19ca188	239	close(vhostfd);
71a6520b	240	return;
5e9be92d NB	241	}
5e9be92d NB	242
5e9be92d NB	243	s->dev.nvqs = VHOST_SCSI_VQ_NUM_FIXED + vs->conf.num_queues;
	244	s->dev.vqs = g_new(struct vhost_virtqueue, s->dev.nvqs);
	245	s->dev.vq_index = 0;
3a1655fc	246	s->dev.backend_features = 0;
5e9be92d	247
81647a65	248	ret = vhost_dev_init(&s->dev, (void *)(uintptr_t)vhostfd,
1e7398a1	249	VHOST_BACKEND_TYPE_KERNEL);
5e9be92d	250	if (ret < 0) {
71a6520b AF	251	error_setg(errp, "vhost-scsi: vhost initialization failed: %s",
	252	strerror(-ret));
	253	return;
5e9be92d	254	}
5e9be92d	255
444c7e0d GA	256	/* At present, channel and lun both are 0 for bootable vhost-scsi disk */
	257	s->channel = 0;
	258	s->lun = 0;
	259	/* Note: we can also get the minimum tpgt from kernel */
	260	s->target = vs->conf.boot_tpgt;
	261
5e9be92d NB	262	error_setg(&s->migration_blocker,
	263	"vhost-scsi does not support migration");
	264	migrate_add_blocker(s->migration_blocker);
5e9be92d NB	265	}
5e9be92d NB	266
306ec6c3	267	static void vhost_scsi_unrealize(DeviceState dev, Error *errp)
5e9be92d	268	{
306ec6c3 AF	269	VirtIODevice *vdev = VIRTIO_DEVICE(dev);
306ec6c3 AF	270	VHostSCSI *s = VHOST_SCSI(dev);
5e9be92d NB	271
	272	migrate_del_blocker(s->migration_blocker);
	273	error_free(s->migration_blocker);
	274
	275	/* This will stop vhost backend. */
	276	vhost_scsi_set_status(vdev, 0);
	277
	278	g_free(s->dev.vqs);
306ec6c3 AF	279
306ec6c3 AF	280	virtio_scsi_common_unrealize(dev, errp);
5e9be92d NB	281	}
5e9be92d NB	282
1956cf6f GA	283	/*
	284	* Implementation of an interface to adjust firmware path
	285	* for the bootindex property handling.
	286	*/
	287	static char vhost_scsi_get_fw_dev_path(FWPathProvider p, BusState *bus,
	288	DeviceState *dev)
	289	{
	290	VHostSCSI *s = VHOST_SCSI(dev);
	291	/* format: channel@channel/vhost-scsi@target,lun */
	292	return g_strdup_printf("channel@%x/%s@%x,%x", s->channel,
	293	qdev_fw_name(dev), s->target, s->lun);
	294	}
	295
5e9be92d	296	static Property vhost_scsi_properties[] = {
21549a46 SZ	297	DEFINE_PROP_STRING("vhostfd", VHostSCSI, parent_obj.conf.vhostfd),
	298	DEFINE_PROP_STRING("wwpn", VHostSCSI, parent_obj.conf.wwpn),
	299	DEFINE_PROP_UINT32("boot_tpgt", VHostSCSI, parent_obj.conf.boot_tpgt, 0),
	300	DEFINE_PROP_UINT32("num_queues", VHostSCSI, parent_obj.conf.num_queues, 1),
	301	DEFINE_PROP_UINT32("max_sectors", VHostSCSI, parent_obj.conf.max_sectors,
	302	0xFFFF),
	303	DEFINE_PROP_UINT32("cmd_per_lun", VHostSCSI, parent_obj.conf.cmd_per_lun,
	304	128),
5e9be92d NB	305	DEFINE_PROP_END_OF_LIST(),
	306	};
	307
	308	static void vhost_scsi_class_init(ObjectClass klass, void data)
	309	{
	310	DeviceClass *dc = DEVICE_CLASS(klass);
	311	VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
1956cf6f	312	FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
71a6520b	313
5e9be92d	314	dc->props = vhost_scsi_properties;
125ee0ed	315	set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
71a6520b	316	vdc->realize = vhost_scsi_realize;
306ec6c3	317	vdc->unrealize = vhost_scsi_unrealize;
5e9be92d NB	318	vdc->get_features = vhost_scsi_get_features;
	319	vdc->set_config = vhost_scsi_set_config;
	320	vdc->set_status = vhost_scsi_set_status;
1956cf6f	321	fwc->get_dev_path = vhost_scsi_get_fw_dev_path;
5e9be92d NB	322	}
5e9be92d NB	323
d4433f32 GA	324	static void vhost_scsi_instance_init(Object *obj)
	325	{
	326	VHostSCSI *dev = VHOST_SCSI(obj);
	327
	328	device_add_bootindex_property(obj, &dev->bootindex, "bootindex", NULL,
	329	DEVICE(dev), NULL);
	330	}
	331
5e9be92d NB	332	static const TypeInfo vhost_scsi_info = {
	333	.name = TYPE_VHOST_SCSI,
	334	.parent = TYPE_VIRTIO_SCSI_COMMON,
	335	.instance_size = sizeof(VHostSCSI),
	336	.class_init = vhost_scsi_class_init,
d4433f32	337	.instance_init = vhost_scsi_instance_init,
1956cf6f GA	338	.interfaces = (InterfaceInfo[]) {
	339	{ TYPE_FW_PATH_PROVIDER },
	340	{ }
	341	},
5e9be92d NB	342	};
	343
	344	static void virtio_register_types(void)
	345	{
	346	type_register_static(&vhost_scsi_info);
	347	}
	348
	349	type_init(virtio_register_types)