1 /* 2 * Virtio SCSI HBA 3 * 4 * Copyright IBM, Corp. 2010 5 * 6 * Authors: 7 * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2. See 10 * the COPYING file in the top-level directory. 11 * 12 */ 13 14 #ifndef QEMU_VIRTIO_SCSI_H 15 #define QEMU_VIRTIO_SCSI_H 16 #include "qom/object.h" 17 18 /* Override CDB/sense data size: they are dynamic (guest controlled) in QEMU */ 19 #define VIRTIO_SCSI_CDB_SIZE 0 20 #define VIRTIO_SCSI_SENSE_SIZE 0 21 #include "standard-headers/linux/virtio_scsi.h" 22 #include "hw/virtio/virtio.h" 23 #include "hw/scsi/scsi.h" 24 #include "chardev/char-fe.h" 25 #include "qapi/qapi-types-virtio.h" 26 #include "system/iothread.h" 27 28 #define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common" 29 OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSCSICommon, VIRTIO_SCSI_COMMON) 30 31 #define TYPE_VIRTIO_SCSI "virtio-scsi-device" 32 OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSCSI, VIRTIO_SCSI) 33 34 #define VIRTIO_SCSI_MAX_CHANNEL 0 35 #define VIRTIO_SCSI_MAX_TARGET 255 36 #define VIRTIO_SCSI_MAX_LUN 16383 37 38 /* Number of virtqueues that are always present */ 39 #define VIRTIO_SCSI_VQ_NUM_FIXED 2 40 41 #define VIRTIO_SCSI_AUTO_NUM_QUEUES UINT32_MAX 42 43 typedef struct virtio_scsi_cmd_req VirtIOSCSICmdReq; 44 typedef struct virtio_scsi_cmd_resp VirtIOSCSICmdResp; 45 typedef struct virtio_scsi_ctrl_tmf_req VirtIOSCSICtrlTMFReq; 46 typedef struct virtio_scsi_ctrl_tmf_resp VirtIOSCSICtrlTMFResp; 47 typedef struct virtio_scsi_ctrl_an_req VirtIOSCSICtrlANReq; 48 typedef struct virtio_scsi_ctrl_an_resp VirtIOSCSICtrlANResp; 49 typedef struct virtio_scsi_event VirtIOSCSIEvent; 50 typedef struct virtio_scsi_config VirtIOSCSIConfig; 51 52 struct VirtIOSCSIConf { 53 uint32_t num_queues; 54 uint32_t virtqueue_size; 55 bool worker_per_virtqueue; 56 bool seg_max_adjust; 57 uint32_t max_sectors; 58 uint32_t cmd_per_lun; 59 char *vhostfd; 60 char *wwpn; 61 CharBackend chardev; 62 uint32_t boot_tpgt; 63 IOThread *iothread; 64 IOThreadVirtQueueMappingList *iothread_vq_mapping_list; 65 }; 66 67 struct VirtIOSCSI; 68 69 struct VirtIOSCSICommon { 70 VirtIODevice parent_obj; 71 VirtIOSCSIConf conf; 72 73 uint32_t sense_size; 74 uint32_t cdb_size; 75 VirtQueue *ctrl_vq; 76 VirtQueue *event_vq; 77 VirtQueue **cmd_vqs; 78 }; 79 80 struct VirtIOSCSIReq; 81 82 struct VirtIOSCSI { 83 VirtIOSCSICommon parent_obj; 84 85 SCSIBus bus; 86 int resetting; /* written from main loop thread, read from any thread */ 87 88 QemuMutex event_lock; /* protects event_vq and events_dropped */ 89 bool events_dropped; 90 91 QemuMutex ctrl_lock; /* protects ctrl_vq */ 92 93 /* Fields for dataplane below */ 94 AioContext **vq_aio_context; /* per-virtqueue AioContext pointer */ 95 96 bool dataplane_started; 97 bool dataplane_starting; 98 bool dataplane_stopping; 99 bool dataplane_fenced; 100 uint32_t host_features; 101 }; 102 103 void virtio_scsi_common_realize(DeviceState *dev, 104 VirtIOHandleOutput ctrl, 105 VirtIOHandleOutput evt, 106 VirtIOHandleOutput cmd, 107 Error **errp); 108 109 void virtio_scsi_common_unrealize(DeviceState *dev); 110 111 void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp); 112 void virtio_scsi_dataplane_cleanup(VirtIOSCSI *s); 113 int virtio_scsi_dataplane_start(VirtIODevice *s); 114 void virtio_scsi_dataplane_stop(VirtIODevice *s); 115 116 #endif /* QEMU_VIRTIO_SCSI_H */ 117