diff options
author | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-03-29 01:08:16 +0000 |
---|---|---|
committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-04-19 16:18:11 +0200 |
commit | 5e9be92d775208cf6cc9bf9a592853888046239e (patch) | |
tree | aa68fa1d02ed674c04888f3300bb628637dabcc2 /include/hw | |
parent | e9cd423fa833533612beaa7674f988954bccb801 (diff) | |
download | hqemu-5e9be92d775208cf6cc9bf9a592853888046239e.zip hqemu-5e9be92d775208cf6cc9bf9a592853888046239e.tar.gz |
vhost-scsi: new device supporting the tcm_vhost Linux kernel module
The WWPN specified in configfs is passed to "-device vhost-scsi-pci".
The tgpt field of the SET_ENDPOINT ioctl is obsolete now, so it is not
available from the QEMU command-line. Instead, I hardcode it to zero.
Changes in Patch-v2:
- Add vhost_scsi_get_features() in order to determine feature bits
supports by host kernel (mst + nab)
- Re-enable usage of DEFINE_VIRTIO_COMMON_FEATURES, and allow
EVENT_IDX to be disabled by host in vhost_scsi_get_features()
- Drop unused hotplug bit in DEFINE_VHOST_SCSI_PROPERTIES
Changes in Patch-v1:
- Set event_idx=off by default (nab, thanks asias)
- Disable hotplug feature bit for v3.9 tcm_vhost kernel code, need to
re-enable in v3.10 (nab)
- Update to latest qemu.git/master HEAD
Changes in WIP-V3:
- Drop ioeventfd vhost_scsi_properties (asias, thanks stefanha)
- Add CONFIG_VHOST_SCSI (asias, thanks stefanha)
- Add hotplug feature bit
Changes in WIP-V2:
- Add backend guest masking support (nab)
- Bump ABI_VERSION to 1 (nab)
- Set up set_guest_notifiers (asias)
- Set up vs->dev.vq_index (asias)
- Drop vs->vs.vdev.{set,clear}_vhost_endpoint (asias)
- Drop VIRTIO_CONFIG_S_DRIVER check in vhost_scsi_set_status (asias)
Howto:
Use the latest seabios, at least commit b44a7be17b
git clone git://git.seabios.org/seabios.git
make
cp out/bios.bin /usr/share/qemu/bios.bin
qemu -device vhost-scsi-pci,wwpn=naa.6001405bd4e8476d,event_idx=off
...
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Asias He <asias@redhat.com>
[ Rebase on top of VirtIOSCSICommon patch, fix bugs in feature
negotiation and irqfd masking - Paolo ]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/hw')
-rw-r--r-- | include/hw/virtio/vhost-scsi.h | 73 | ||||
-rw-r--r-- | include/hw/virtio/virtio-scsi.h | 2 |
2 files changed, 75 insertions, 0 deletions
diff --git a/include/hw/virtio/vhost-scsi.h b/include/hw/virtio/vhost-scsi.h new file mode 100644 index 0000000..85cc031 --- /dev/null +++ b/include/hw/virtio/vhost-scsi.h @@ -0,0 +1,73 @@ +/* + * vhost_scsi host device + * + * Copyright IBM, Corp. 2011 + * + * Authors: + * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> + * + * 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. + * + */ + +#ifndef VHOST_SCSI_H +#define VHOST_SCSI_H + +#include "qemu-common.h" +#include "hw/qdev.h" +#include "hw/virtio/virtio-scsi.h" +#include "hw/virtio/vhost.h" + +/* + * Used by QEMU userspace to ensure a consistent vhost-scsi ABI. + * + * ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate + + * RFC-v2 vhost-scsi userspace. Add GET_ABI_VERSION ioctl usage + * ABI Rev 1: January 2013. Ignore vhost_tpgt filed in struct vhost_scsi_target. + * All the targets under vhost_wwpn can be seen and used by guest. + */ + +#define VHOST_SCSI_ABI_VERSION 1 + +/* TODO #include <linux/vhost.h> properly */ +/* For VHOST_SCSI_SET_ENDPOINT/VHOST_SCSI_CLEAR_ENDPOINT ioctl */ +struct vhost_scsi_target { + int abi_version; + char vhost_wwpn[224]; + unsigned short vhost_tpgt; + unsigned short reserved; +}; + +enum vhost_scsi_vq_list { + VHOST_SCSI_VQ_CONTROL = 0, + VHOST_SCSI_VQ_EVENT = 1, + VHOST_SCSI_VQ_NUM_FIXED = 2, +}; + +#define VHOST_VIRTIO 0xAF +#define VHOST_SCSI_SET_ENDPOINT _IOW(VHOST_VIRTIO, 0x40, struct vhost_scsi_target) +#define VHOST_SCSI_CLEAR_ENDPOINT _IOW(VHOST_VIRTIO, 0x41, struct vhost_scsi_target) +#define VHOST_SCSI_GET_ABI_VERSION _IOW(VHOST_VIRTIO, 0x42, int) + +#define TYPE_VHOST_SCSI "vhost-scsi" +#define VHOST_SCSI(obj) \ + OBJECT_CHECK(VHostSCSI, (obj), TYPE_VHOST_SCSI) + +typedef struct VHostSCSI { + VirtIOSCSICommon parent_obj; + + Error *migration_blocker; + + struct vhost_dev dev; +} VHostSCSI; + +#define DEFINE_VHOST_SCSI_PROPERTIES(_state, _conf_field) \ + DEFINE_PROP_STRING("vhostfd", _state, _conf_field.vhostfd), \ + DEFINE_PROP_STRING("wwpn", _state, _conf_field.wwpn), \ + DEFINE_PROP_UINT32("num_queues", _state, _conf_field.num_queues, 1), \ + DEFINE_PROP_UINT32("max_sectors", _state, _conf_field.max_sectors, 0xFFFF), \ + DEFINE_PROP_UINT32("cmd_per_lun", _state, _conf_field.cmd_per_lun, 128) + + +#endif diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h index 4a961b9..4db346b 100644 --- a/include/hw/virtio/virtio-scsi.h +++ b/include/hw/virtio/virtio-scsi.h @@ -151,6 +151,8 @@ struct VirtIOSCSIConf { uint32_t num_queues; uint32_t max_sectors; uint32_t cmd_per_lun; + char *vhostfd; + char *wwpn; }; typedef struct VirtIOSCSICommon { |