122 lines
3.1 KiB
C
122 lines
3.1 KiB
C
/*
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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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#ifndef QEMU_VIRTIO_SCSI_H
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#define QEMU_VIRTIO_SCSI_H
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#include "qom/object.h"
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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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#include "standard-headers/linux/virtio_scsi.h"
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#include "hw/virtio/virtio.h"
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#include "hw/pci/pci.h"
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#include "hw/scsi/scsi.h"
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#include "chardev/char-fe.h"
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#include "sysemu/iothread.h"
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#define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common"
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OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSCSICommon, VIRTIO_SCSI_COMMON)
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#define TYPE_VIRTIO_SCSI "virtio-scsi-device"
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OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSCSI, VIRTIO_SCSI)
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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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/* Number of virtqueues that are always present */
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#define VIRTIO_SCSI_VQ_NUM_FIXED 2
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#define VIRTIO_SCSI_AUTO_NUM_QUEUES UINT32_MAX
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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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struct VirtIOSCSIConf {
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uint32_t num_queues;
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uint32_t virtqueue_size;
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bool seg_max_adjust;
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uint32_t max_sectors;
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uint32_t cmd_per_lun;
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char *vhostfd;
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char *wwpn;
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CharBackend chardev;
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uint32_t boot_tpgt;
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IOThread *iothread;
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};
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struct VirtIOSCSI;
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struct VirtIOSCSICommon {
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VirtIODevice parent_obj;
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VirtIOSCSIConf conf;
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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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VirtQueue **cmd_vqs;
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};
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struct VirtIOSCSI {
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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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/* 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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bool dataplane_fenced;
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uint32_t host_features;
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};
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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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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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void virtio_scsi_common_unrealize(DeviceState *dev);
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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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#endif /* QEMU_VIRTIO_SCSI_H */
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