19d339f11d
Similar to this property in virtio-blk for dataplane, add it as a QOM link in virtio-scsi and an alias in virtio-scsi-pci and virtio-scsi-ccw, in order to assign an iothread to the device. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
239 lines
7.4 KiB
C
239 lines
7.4 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 "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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#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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#define TYPE_VIRTIO_SCSI "virtio-scsi-device"
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#define VIRTIO_SCSI(obj) \
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OBJECT_CHECK(VirtIOSCSI, (obj), TYPE_VIRTIO_SCSI)
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/* The ID for virtio_scsi */
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#define VIRTIO_ID_SCSI 8
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/* Feature Bits */
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#define VIRTIO_SCSI_F_INOUT 0
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#define VIRTIO_SCSI_F_HOTPLUG 1
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#define VIRTIO_SCSI_F_CHANGE 2
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#define VIRTIO_SCSI_VQ_SIZE 128
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#define VIRTIO_SCSI_CDB_SIZE 32
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#define VIRTIO_SCSI_SENSE_SIZE 96
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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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/* Response codes */
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#define VIRTIO_SCSI_S_OK 0
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#define VIRTIO_SCSI_S_OVERRUN 1
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#define VIRTIO_SCSI_S_ABORTED 2
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#define VIRTIO_SCSI_S_BAD_TARGET 3
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#define VIRTIO_SCSI_S_RESET 4
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#define VIRTIO_SCSI_S_BUSY 5
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#define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6
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#define VIRTIO_SCSI_S_TARGET_FAILURE 7
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#define VIRTIO_SCSI_S_NEXUS_FAILURE 8
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#define VIRTIO_SCSI_S_FAILURE 9
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#define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10
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#define VIRTIO_SCSI_S_FUNCTION_REJECTED 11
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#define VIRTIO_SCSI_S_INCORRECT_LUN 12
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/* Controlq type codes. */
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#define VIRTIO_SCSI_T_TMF 0
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#define VIRTIO_SCSI_T_AN_QUERY 1
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#define VIRTIO_SCSI_T_AN_SUBSCRIBE 2
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/* Valid TMF subtypes. */
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#define VIRTIO_SCSI_T_TMF_ABORT_TASK 0
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#define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1
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#define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2
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#define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3
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#define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4
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#define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5
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#define VIRTIO_SCSI_T_TMF_QUERY_TASK 6
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#define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7
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/* Events. */
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#define VIRTIO_SCSI_T_EVENTS_MISSED 0x80000000
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#define VIRTIO_SCSI_T_NO_EVENT 0
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#define VIRTIO_SCSI_T_TRANSPORT_RESET 1
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#define VIRTIO_SCSI_T_ASYNC_NOTIFY 2
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#define VIRTIO_SCSI_T_PARAM_CHANGE 3
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/* Reasons for transport reset event */
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#define VIRTIO_SCSI_EVT_RESET_HARD 0
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#define VIRTIO_SCSI_EVT_RESET_RESCAN 1
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#define VIRTIO_SCSI_EVT_RESET_REMOVED 2
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/* SCSI command request, followed by CDB and data-out */
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typedef struct {
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uint8_t lun[8]; /* Logical Unit Number */
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uint64_t tag; /* Command identifier */
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uint8_t task_attr; /* Task attribute */
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uint8_t prio;
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uint8_t crn;
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} QEMU_PACKED VirtIOSCSICmdReq;
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/* Response, followed by sense data and data-in */
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typedef struct {
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uint32_t sense_len; /* Sense data length */
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uint32_t resid; /* Residual bytes in data buffer */
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uint16_t status_qualifier; /* Status qualifier */
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uint8_t status; /* Command completion status */
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uint8_t response; /* Response values */
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} QEMU_PACKED VirtIOSCSICmdResp;
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/* Task Management Request */
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typedef struct {
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uint32_t type;
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uint32_t subtype;
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uint8_t lun[8];
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uint64_t tag;
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} QEMU_PACKED VirtIOSCSICtrlTMFReq;
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typedef struct {
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uint8_t response;
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} QEMU_PACKED VirtIOSCSICtrlTMFResp;
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/* Asynchronous notification query/subscription */
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typedef struct {
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uint32_t type;
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uint8_t lun[8];
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uint32_t event_requested;
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} QEMU_PACKED VirtIOSCSICtrlANReq;
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typedef struct {
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uint32_t event_actual;
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uint8_t response;
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} QEMU_PACKED VirtIOSCSICtrlANResp;
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typedef struct {
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uint32_t event;
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uint8_t lun[8];
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uint32_t reason;
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} QEMU_PACKED VirtIOSCSIEvent;
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typedef struct {
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uint32_t num_queues;
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uint32_t seg_max;
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uint32_t max_sectors;
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uint32_t cmd_per_lun;
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uint32_t event_info_size;
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uint32_t sense_size;
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uint32_t cdb_size;
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uint16_t max_channel;
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uint16_t max_target;
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uint32_t max_lun;
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} QEMU_PACKED VirtIOSCSIConfig;
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struct VirtIOSCSIConf {
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uint32_t num_queues;
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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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IOThread *iothread;
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};
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typedef 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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} VirtIOSCSICommon;
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typedef struct {
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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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} VirtIOSCSI;
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typedef struct VirtIOSCSIReq {
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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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/* Note:
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* - fields before elem are initialized by virtio_scsi_init_req;
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* - elem is uninitialized at the time of allocation.
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* - fields after elem are zeroed by virtio_scsi_init_req.
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* */
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VirtQueueElement elem;
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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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struct {
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VirtIOSCSICmdReq cmd;
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uint8_t cdb[];
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} QEMU_PACKED;
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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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QEMU_BUILD_BUG_ON(offsetof(VirtIOSCSIReq, req.cdb) !=
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offsetof(VirtIOSCSIReq, req.cmd) + sizeof(VirtIOSCSICmdReq));
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#define DEFINE_VIRTIO_SCSI_PROPERTIES(_state, _conf_field) \
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DEFINE_PROP_UINT32("num_queues", _state, _conf_field.num_queues, 1), \
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DEFINE_PROP_UINT32("max_sectors", _state, _conf_field.max_sectors, 0xFFFF),\
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DEFINE_PROP_UINT32("cmd_per_lun", _state, _conf_field.cmd_per_lun, 128)
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#define DEFINE_VIRTIO_SCSI_FEATURES(_state, _feature_field) \
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DEFINE_PROP_BIT("any_layout", _state, _feature_field, \
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VIRTIO_F_ANY_LAYOUT, true), \
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DEFINE_PROP_BIT("hotplug", _state, _feature_field, VIRTIO_SCSI_F_HOTPLUG, \
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true), \
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DEFINE_PROP_BIT("param_change", _state, _feature_field, \
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VIRTIO_SCSI_F_CHANGE, true)
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typedef void (*HandleOutput)(VirtIODevice *, VirtQueue *);
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void virtio_scsi_common_realize(DeviceState *dev, Error **errp,
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HandleOutput ctrl, HandleOutput evt,
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HandleOutput cmd);
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void virtio_scsi_common_unrealize(DeviceState *dev, Error **errp);
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void virtio_scsi_handle_ctrl_req(VirtIOSCSI *s, VirtIOSCSIReq *req);
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void virtio_scsi_handle_cmd_req(VirtIOSCSI *s, VirtIOSCSIReq *req);
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VirtIOSCSIReq *virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq);
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void virtio_scsi_free_req(VirtIOSCSIReq *req);
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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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#endif /* _QEMU_VIRTIO_SCSI_H */
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