[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/error-report.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, s->dev.vq_index + 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,
                                        Error **errp)
{
    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);

    vhost_dev_cleanup(&s->dev);
    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"
d49b6836	19	#include "qemu/error-report.h"
5e9be92d NB	20	#include "qemu/queue.h"
	21	#include "monitor/monitor.h"
	22	#include "migration/migration.h"
	23	#include "hw/virtio/vhost-scsi.h"
	24	#include "hw/virtio/vhost.h"
	25	#include "hw/virtio/virtio-scsi.h"
1c819449	26	#include "hw/virtio/virtio-bus.h"
7ce04255	27	#include "hw/virtio/virtio-access.h"
1956cf6f	28	#include "hw/fw-path-provider.h"
5e9be92d	29
2e6d46d7 NN	30	/* Features supported by host kernel. */
	31	static const int kernel_feature_bits[] = {
	32	VIRTIO_F_NOTIFY_ON_EMPTY,
	33	VIRTIO_RING_F_INDIRECT_DESC,
	34	VIRTIO_RING_F_EVENT_IDX,
	35	VIRTIO_SCSI_F_HOTPLUG,
	36	VHOST_INVALID_FEATURE_BIT
	37	};
	38
5e9be92d NB	39	static int vhost_scsi_set_endpoint(VHostSCSI *s)
	40	{
	41	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
24d1eb33	42	const VhostOps *vhost_ops = s->dev.vhost_ops;
5e9be92d NB	43	struct vhost_scsi_target backend;
	44	int ret;
	45
	46	memset(&backend, 0, sizeof(backend));
	47	pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
24d1eb33	48	ret = vhost_ops->vhost_call(&s->dev, VHOST_SCSI_SET_ENDPOINT, &backend);
5e9be92d NB	49	if (ret < 0) {
	50	return -errno;
	51	}
	52	return 0;
	53	}
	54
	55	static void vhost_scsi_clear_endpoint(VHostSCSI *s)
	56	{
	57	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
	58	struct vhost_scsi_target backend;
24d1eb33	59	const VhostOps *vhost_ops = s->dev.vhost_ops;
5e9be92d NB	60
	61	memset(&backend, 0, sizeof(backend));
	62	pstrcpy(backend.vhost_wwpn, sizeof(backend.vhost_wwpn), vs->conf.wwpn);
24d1eb33	63	vhost_ops->vhost_call(&s->dev, VHOST_SCSI_CLEAR_ENDPOINT, &backend);
5e9be92d NB	64	}
	65
	66	static int vhost_scsi_start(VHostSCSI *s)
	67	{
	68	int ret, abi_version, i;
	69	VirtIODevice *vdev = VIRTIO_DEVICE(s);
1c819449 FK	70	BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
1c819449 FK	71	VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
24d1eb33	72	const VhostOps *vhost_ops = s->dev.vhost_ops;
5e9be92d	73
1c819449	74	if (!k->set_guest_notifiers) {
5e9be92d NB	75	error_report("binding does not support guest notifiers");
	76	return -ENOSYS;
	77	}
	78
24d1eb33 NN	79	ret = vhost_ops->vhost_call(&s->dev,
24d1eb33 NN	80	VHOST_SCSI_GET_ABI_VERSION, &abi_version);
5e9be92d NB	81	if (ret < 0) {
	82	return -errno;
	83	}
	84	if (abi_version > VHOST_SCSI_ABI_VERSION) {
	85	error_report("vhost-scsi: The running tcm_vhost kernel abi_version:"
	86	" %d is greater than vhost_scsi userspace supports: %d, please"
f6a16175	87	" upgrade your version of QEMU", abi_version,
5e9be92d NB	88	VHOST_SCSI_ABI_VERSION);
	89	return -ENOSYS;
	90	}
	91
	92	ret = vhost_dev_enable_notifiers(&s->dev, vdev);
	93	if (ret < 0) {
	94	return ret;
	95	}
	96
	97	s->dev.acked_features = vdev->guest_features;
	98	ret = vhost_dev_start(&s->dev, vdev);
	99	if (ret < 0) {
	100	error_report("Error start vhost dev");
	101	goto err_notifiers;
	102	}
	103
	104	ret = vhost_scsi_set_endpoint(s);
	105	if (ret < 0) {
	106	error_report("Error set vhost-scsi endpoint");
	107	goto err_vhost_stop;
	108	}
	109
1c819449	110	ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, true);
5e9be92d NB	111	if (ret < 0) {
	112	error_report("Error binding guest notifier");
	113	goto err_endpoint;
	114	}
	115
	116	/* guest_notifier_mask/pending not used yet, so just unmask
	117	* everything here. virtio-pci will do the right thing by
	118	* enabling/disabling irqfd.
	119	*/
	120	for (i = 0; i < s->dev.nvqs; i++) {
fe2d1a81	121	vhost_virtqueue_mask(&s->dev, vdev, s->dev.vq_index + i, false);
5e9be92d NB	122	}
	123
	124	return ret;
	125
	126	err_endpoint:
	127	vhost_scsi_clear_endpoint(s);
	128	err_vhost_stop:
	129	vhost_dev_stop(&s->dev, vdev);
	130	err_notifiers:
	131	vhost_dev_disable_notifiers(&s->dev, vdev);
	132	return ret;
	133	}
	134
	135	static void vhost_scsi_stop(VHostSCSI *s)
	136	{
	137	VirtIODevice *vdev = VIRTIO_DEVICE(s);
1c819449 FK	138	BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
1c819449 FK	139	VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
5e9be92d NB	140	int ret = 0;
5e9be92d NB	141
0e22a2d1	142	if (k->set_guest_notifiers) {
1c819449	143	ret = k->set_guest_notifiers(qbus->parent, s->dev.nvqs, false);
5e9be92d	144	if (ret < 0) {
f6a16175	145	error_report("vhost guest notifier cleanup failed: %d", ret);
5e9be92d NB	146	}
	147	}
	148	assert(ret >= 0);
	149
	150	vhost_scsi_clear_endpoint(s);
	151	vhost_dev_stop(&s->dev, vdev);
	152	vhost_dev_disable_notifiers(&s->dev, vdev);
	153	}
	154
019a3edb	155	static uint64_t vhost_scsi_get_features(VirtIODevice *vdev,
9d5b731d JW	156	uint64_t features,
9d5b731d JW	157	Error **errp)
5e9be92d NB	158	{
	159	VHostSCSI *s = VHOST_SCSI(vdev);
	160
2e6d46d7	161	return vhost_get_features(&s->dev, kernel_feature_bits, features);
5e9be92d NB	162	}
	163
	164	static void vhost_scsi_set_config(VirtIODevice *vdev,
	165	const uint8_t *config)
	166	{
	167	VirtIOSCSIConfig scsiconf = (VirtIOSCSIConfig )config;
	168	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev);
	169
7ce04255 PB	170	if ((uint32_t) virtio_ldl_p(vdev, &scsiconf->sense_size) != vs->sense_size \|\|
7ce04255 PB	171	(uint32_t) virtio_ldl_p(vdev, &scsiconf->cdb_size) != vs->cdb_size) {
5e9be92d NB	172	error_report("vhost-scsi does not support changing the sense data and CDB sizes");
	173	exit(1);
	174	}
	175	}
	176
	177	static void vhost_scsi_set_status(VirtIODevice *vdev, uint8_t val)
	178	{
	179	VHostSCSI s = (VHostSCSI )vdev;
	180	bool start = (val & VIRTIO_CONFIG_S_DRIVER_OK);
	181
	182	if (s->dev.started == start) {
	183	return;
	184	}
	185
	186	if (start) {
	187	int ret;
	188
	189	ret = vhost_scsi_start(s);
	190	if (ret < 0) {
f6a16175	191	error_report("virtio-scsi: unable to start vhost: %s",
5e9be92d NB	192	strerror(-ret));
	193
	194	/* There is no userspace virtio-scsi fallback so exit */
	195	exit(1);
	196	}
	197	} else {
	198	vhost_scsi_stop(s);
	199	}
	200	}
	201
91d670fb ML	202	static void vhost_dummy_handle_output(VirtIODevice vdev, VirtQueue vq)
	203	{
	204	}
	205
71a6520b	206	static void vhost_scsi_realize(DeviceState dev, Error *errp)
5e9be92d	207	{
71a6520b AF	208	VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
	209	VHostSCSI *s = VHOST_SCSI(dev);
	210	Error *err = NULL;
5e9be92d NB	211	int vhostfd = -1;
	212	int ret;
	213
	214	if (!vs->conf.wwpn) {
71a6520b AF	215	error_setg(errp, "vhost-scsi: missing wwpn");
71a6520b AF	216	return;
5e9be92d NB	217	}
	218
	219	if (vs->conf.vhostfd) {
1677f4c6	220	vhostfd = monitor_fd_param(cur_mon, vs->conf.vhostfd, &err);
5e9be92d	221	if (vhostfd == -1) {
248337e1 MA	222	error_setg(errp, "vhost-scsi: unable to parse vhostfd: %s",
	223	error_get_pretty(err));
	224	error_free(err);
71a6520b	225	return;
5e9be92d	226	}
81647a65 NN	227	} else {
	228	vhostfd = open("/dev/vhost-scsi", O_RDWR);
	229	if (vhostfd < 0) {
	230	error_setg(errp, "vhost-scsi: open vhost char device failed: %s",
	231	strerror(errno));
	232	return;
	233	}
5e9be92d NB	234	}
5e9be92d NB	235
91d670fb ML	236	virtio_scsi_common_realize(dev, &err, vhost_dummy_handle_output,
	237	vhost_dummy_handle_output,
	238	vhost_dummy_handle_output);
71a6520b AF	239	if (err != NULL) {
71a6520b AF	240	error_propagate(errp, err);
b19ca188	241	close(vhostfd);
71a6520b	242	return;
5e9be92d NB	243	}
5e9be92d NB	244
5e9be92d NB	245	s->dev.nvqs = VHOST_SCSI_VQ_NUM_FIXED + vs->conf.num_queues;
	246	s->dev.vqs = g_new(struct vhost_virtqueue, s->dev.nvqs);
	247	s->dev.vq_index = 0;
3a1655fc	248	s->dev.backend_features = 0;
5e9be92d	249
81647a65	250	ret = vhost_dev_init(&s->dev, (void *)(uintptr_t)vhostfd,
1e7398a1	251	VHOST_BACKEND_TYPE_KERNEL);
5e9be92d	252	if (ret < 0) {
71a6520b AF	253	error_setg(errp, "vhost-scsi: vhost initialization failed: %s",
	254	strerror(-ret));
	255	return;
5e9be92d	256	}
5e9be92d	257
444c7e0d GA	258	/* At present, channel and lun both are 0 for bootable vhost-scsi disk */
	259	s->channel = 0;
	260	s->lun = 0;
	261	/* Note: we can also get the minimum tpgt from kernel */
	262	s->target = vs->conf.boot_tpgt;
	263
5e9be92d NB	264	error_setg(&s->migration_blocker,
	265	"vhost-scsi does not support migration");
	266	migrate_add_blocker(s->migration_blocker);
5e9be92d NB	267	}
5e9be92d NB	268
306ec6c3	269	static void vhost_scsi_unrealize(DeviceState dev, Error *errp)
5e9be92d	270	{
306ec6c3 AF	271	VirtIODevice *vdev = VIRTIO_DEVICE(dev);
306ec6c3 AF	272	VHostSCSI *s = VHOST_SCSI(dev);
5e9be92d NB	273
	274	migrate_del_blocker(s->migration_blocker);
	275	error_free(s->migration_blocker);
	276
	277	/* This will stop vhost backend. */
	278	vhost_scsi_set_status(vdev, 0);
	279
af103c93	280	vhost_dev_cleanup(&s->dev);
5e9be92d	281	g_free(s->dev.vqs);
306ec6c3 AF	282
306ec6c3 AF	283	virtio_scsi_common_unrealize(dev, errp);
5e9be92d NB	284	}
5e9be92d NB	285
1956cf6f GA	286	/*
	287	* Implementation of an interface to adjust firmware path
	288	* for the bootindex property handling.
	289	*/
	290	static char vhost_scsi_get_fw_dev_path(FWPathProvider p, BusState *bus,
	291	DeviceState *dev)
	292	{
	293	VHostSCSI *s = VHOST_SCSI(dev);
	294	/* format: channel@channel/vhost-scsi@target,lun */
	295	return g_strdup_printf("channel@%x/%s@%x,%x", s->channel,
	296	qdev_fw_name(dev), s->target, s->lun);
	297	}
	298
5e9be92d	299	static Property vhost_scsi_properties[] = {
21549a46 SZ	300	DEFINE_PROP_STRING("vhostfd", VHostSCSI, parent_obj.conf.vhostfd),
	301	DEFINE_PROP_STRING("wwpn", VHostSCSI, parent_obj.conf.wwpn),
	302	DEFINE_PROP_UINT32("boot_tpgt", VHostSCSI, parent_obj.conf.boot_tpgt, 0),
	303	DEFINE_PROP_UINT32("num_queues", VHostSCSI, parent_obj.conf.num_queues, 1),
	304	DEFINE_PROP_UINT32("max_sectors", VHostSCSI, parent_obj.conf.max_sectors,
	305	0xFFFF),
	306	DEFINE_PROP_UINT32("cmd_per_lun", VHostSCSI, parent_obj.conf.cmd_per_lun,
	307	128),
5e9be92d NB	308	DEFINE_PROP_END_OF_LIST(),
	309	};
	310
	311	static void vhost_scsi_class_init(ObjectClass klass, void data)
	312	{
	313	DeviceClass *dc = DEVICE_CLASS(klass);
	314	VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
1956cf6f	315	FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
71a6520b	316
5e9be92d	317	dc->props = vhost_scsi_properties;
125ee0ed	318	set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
71a6520b	319	vdc->realize = vhost_scsi_realize;
306ec6c3	320	vdc->unrealize = vhost_scsi_unrealize;
5e9be92d NB	321	vdc->get_features = vhost_scsi_get_features;
	322	vdc->set_config = vhost_scsi_set_config;
	323	vdc->set_status = vhost_scsi_set_status;
1956cf6f	324	fwc->get_dev_path = vhost_scsi_get_fw_dev_path;
5e9be92d NB	325	}
5e9be92d NB	326
d4433f32 GA	327	static void vhost_scsi_instance_init(Object *obj)
	328	{
	329	VHostSCSI *dev = VHOST_SCSI(obj);
	330
	331	device_add_bootindex_property(obj, &dev->bootindex, "bootindex", NULL,
	332	DEVICE(dev), NULL);
	333	}
	334
5e9be92d NB	335	static const TypeInfo vhost_scsi_info = {
	336	.name = TYPE_VHOST_SCSI,
	337	.parent = TYPE_VIRTIO_SCSI_COMMON,
	338	.instance_size = sizeof(VHostSCSI),
	339	.class_init = vhost_scsi_class_init,
d4433f32	340	.instance_init = vhost_scsi_instance_init,
1956cf6f GA	341	.interfaces = (InterfaceInfo[]) {
	342	{ TYPE_FW_PATH_PROVIDER },
	343	{ }
	344	},
5e9be92d NB	345	};
	346
	347	static void virtio_register_types(void)
	348	{
	349	type_register_static(&vhost_scsi_info);
	350	}
	351
	352	type_init(virtio_register_types)