2011-02-11 09:40:59 +01:00
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/*
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* Virtio SCSI HBA
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*
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* Copyright IBM, Corp. 2010
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*
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* Authors:
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* Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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2016-06-29 13:47:03 +02:00
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#ifndef QEMU_VIRTIO_SCSI_H
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#define QEMU_VIRTIO_SCSI_H
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2011-02-11 09:40:59 +01:00
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2015-03-11 14:31:29 +01:00
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/* Override CDB/sense data size: they are dynamic (guest controlled) in QEMU */
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#define VIRTIO_SCSI_CDB_SIZE 0
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#define VIRTIO_SCSI_SENSE_SIZE 0
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2015-02-16 22:36:20 +01:00
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#include "standard-headers/linux/virtio_scsi.h"
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2013-02-05 17:06:20 +01:00
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#include "hw/virtio/virtio.h"
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2013-02-04 15:40:22 +01:00
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#include "hw/pci/pci.h"
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2013-02-05 17:06:20 +01:00
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#include "hw/scsi/scsi.h"
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2017-03-02 19:25:52 +01:00
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#include "chardev/char-fe.h"
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2014-09-24 09:21:41 +02:00
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#include "sysemu/iothread.h"
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2011-02-11 09:40:59 +01:00
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2013-03-29 02:08:15 +01:00
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#define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common"
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#define VIRTIO_SCSI_COMMON(obj) \
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OBJECT_CHECK(VirtIOSCSICommon, (obj), TYPE_VIRTIO_SCSI_COMMON)
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2013-04-09 12:04:48 +02:00
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#define TYPE_VIRTIO_SCSI "virtio-scsi-device"
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2013-03-21 15:15:14 +01:00
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#define VIRTIO_SCSI(obj) \
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OBJECT_CHECK(VirtIOSCSI, (obj), TYPE_VIRTIO_SCSI)
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2013-03-29 02:08:15 +01:00
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#define VIRTIO_SCSI_MAX_CHANNEL 0
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#define VIRTIO_SCSI_MAX_TARGET 255
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#define VIRTIO_SCSI_MAX_LUN 16383
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2015-02-16 22:36:20 +01:00
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typedef struct virtio_scsi_cmd_req VirtIOSCSICmdReq;
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typedef struct virtio_scsi_cmd_resp VirtIOSCSICmdResp;
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typedef struct virtio_scsi_ctrl_tmf_req VirtIOSCSICtrlTMFReq;
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typedef struct virtio_scsi_ctrl_tmf_resp VirtIOSCSICtrlTMFResp;
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typedef struct virtio_scsi_ctrl_an_req VirtIOSCSICtrlANReq;
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typedef struct virtio_scsi_ctrl_an_resp VirtIOSCSICtrlANResp;
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typedef struct virtio_scsi_event VirtIOSCSIEvent;
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typedef struct virtio_scsi_config VirtIOSCSIConfig;
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2013-03-29 02:08:15 +01:00
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2011-02-11 09:40:59 +01:00
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struct VirtIOSCSIConf {
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uint32_t num_queues;
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2017-08-10 18:52:55 +02:00
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uint32_t virtqueue_size;
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2011-02-11 09:40:59 +01:00
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uint32_t max_sectors;
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uint32_t cmd_per_lun;
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2017-03-02 19:25:51 +01:00
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#ifdef CONFIG_VHOST_SCSI
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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>
2013-03-29 02:08:16 +01:00
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char *vhostfd;
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char *wwpn;
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2017-03-02 19:25:51 +01:00
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#endif
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2017-03-02 19:25:52 +01:00
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CharBackend chardev;
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2015-01-29 08:08:54 +01:00
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uint32_t boot_tpgt;
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2014-08-06 07:35:06 +02:00
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IOThread *iothread;
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2011-02-11 09:40:59 +01:00
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};
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2014-09-24 09:21:41 +02:00
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struct VirtIOSCSI;
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2013-03-29 02:08:15 +01:00
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typedef struct VirtIOSCSICommon {
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2013-03-21 15:15:18 +01:00
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VirtIODevice parent_obj;
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2013-03-21 15:15:11 +01:00
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VirtIOSCSIConf conf;
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2013-03-18 17:37:18 +01:00
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uint32_t sense_size;
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uint32_t cdb_size;
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VirtQueue *ctrl_vq;
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VirtQueue *event_vq;
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2013-03-21 15:15:12 +01:00
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VirtQueue **cmd_vqs;
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2013-03-29 02:08:15 +01:00
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} VirtIOSCSICommon;
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2014-09-24 09:21:41 +02:00
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typedef struct VirtIOSCSI {
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2013-03-29 02:08:15 +01:00
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VirtIOSCSICommon parent_obj;
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SCSIBus bus;
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int resetting;
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bool events_dropped;
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2014-09-23 09:49:24 +02:00
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/* Fields for dataplane below */
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AioContext *ctx; /* one iothread per virtio-scsi-pci for now */
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bool dataplane_started;
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bool dataplane_starting;
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bool dataplane_stopping;
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2014-10-15 15:15:26 +02:00
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bool dataplane_fenced;
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2015-04-28 13:51:13 +02:00
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uint32_t host_features;
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2013-03-18 17:37:18 +01:00
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} VirtIOSCSI;
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2014-08-06 07:35:00 +02:00
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typedef struct VirtIOSCSIReq {
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2016-01-31 11:28:57 +01:00
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/* Note:
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* - fields up to resp_iov are initialized by virtio_scsi_init_req;
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* - fields starting at vring are zeroed by virtio_scsi_init_req.
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* */
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VirtQueueElement elem;
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2014-08-06 07:35:00 +02:00
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VirtIOSCSI *dev;
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VirtQueue *vq;
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QEMUSGList qsgl;
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QEMUIOVector resp_iov;
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2014-09-30 05:40:23 +02:00
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union {
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/* Used for two-stage request submission */
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QTAILQ_ENTRY(VirtIOSCSIReq) next;
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/* Used for cancellation of request during TMFs */
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int remaining;
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};
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2014-09-23 09:49:28 +02:00
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2014-08-06 07:35:00 +02:00
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SCSIRequest *sreq;
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size_t resp_size;
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enum SCSIXferMode mode;
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union {
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VirtIOSCSICmdResp cmd;
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VirtIOSCSICtrlTMFResp tmf;
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VirtIOSCSICtrlANResp an;
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VirtIOSCSIEvent event;
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} resp;
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union {
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2015-03-11 15:10:09 +01:00
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VirtIOSCSICmdReq cmd;
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2014-08-06 07:35:00 +02:00
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VirtIOSCSICtrlTMFReq tmf;
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VirtIOSCSICtrlANReq an;
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} req;
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} VirtIOSCSIReq;
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2017-03-17 07:14:46 +01:00
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static inline void virtio_scsi_acquire(VirtIOSCSI *s)
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{
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if (s->ctx) {
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aio_context_acquire(s->ctx);
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}
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}
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static inline void virtio_scsi_release(VirtIOSCSI *s)
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{
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if (s->ctx) {
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aio_context_release(s->ctx);
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}
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}
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2017-04-21 14:27:07 +02:00
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void virtio_scsi_common_realize(DeviceState *dev,
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VirtIOHandleOutput ctrl,
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VirtIOHandleOutput evt,
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VirtIOHandleOutput cmd,
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Error **errp);
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2014-06-19 10:12:00 +02:00
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2019-07-17 11:46:50 +02:00
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void virtio_scsi_common_unrealize(DeviceState *dev);
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2017-02-09 09:40:47 +01:00
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bool virtio_scsi_handle_event_vq(VirtIOSCSI *s, VirtQueue *vq);
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bool virtio_scsi_handle_cmd_vq(VirtIOSCSI *s, VirtQueue *vq);
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bool virtio_scsi_handle_ctrl_vq(VirtIOSCSI *s, VirtQueue *vq);
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2016-02-04 15:26:51 +01:00
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void virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq, VirtIOSCSIReq *req);
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2014-08-06 07:35:04 +02:00
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void virtio_scsi_free_req(VirtIOSCSIReq *req);
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2014-08-06 07:35:05 +02:00
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void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
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uint32_t event, uint32_t reason);
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2013-03-29 02:08:15 +01:00
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2016-10-21 22:48:10 +02:00
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void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp);
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int virtio_scsi_dataplane_start(VirtIODevice *s);
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void virtio_scsi_dataplane_stop(VirtIODevice *s);
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2014-09-23 09:49:24 +02:00
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2016-06-29 13:47:03 +02:00
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#endif /* QEMU_VIRTIO_SCSI_H */
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