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 "sysemu/iothread.h" 26 27 #define TYPE_VIRTIO_SCSI_COMMON "virtio-scsi-common" 28 OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSCSICommon, VIRTIO_SCSI_COMMON) 29 30 #define TYPE_VIRTIO_SCSI "virtio-scsi-device" 31 OBJECT_DECLARE_SIMPLE_TYPE(VirtIOSCSI, VIRTIO_SCSI) 32 33 #define VIRTIO_SCSI_MAX_CHANNEL 0 34 #define VIRTIO_SCSI_MAX_TARGET 255 35 #define VIRTIO_SCSI_MAX_LUN 16383 36 37 /* Number of virtqueues that are always present */ 38 #define VIRTIO_SCSI_VQ_NUM_FIXED 2 39 40 #define VIRTIO_SCSI_AUTO_NUM_QUEUES UINT32_MAX 41 42 typedef struct virtio_scsi_cmd_req VirtIOSCSICmdReq; 43 typedef struct virtio_scsi_cmd_resp VirtIOSCSICmdResp; 44 typedef struct virtio_scsi_ctrl_tmf_req VirtIOSCSICtrlTMFReq; 45 typedef struct virtio_scsi_ctrl_tmf_resp VirtIOSCSICtrlTMFResp; 46 typedef struct virtio_scsi_ctrl_an_req VirtIOSCSICtrlANReq; 47 typedef struct virtio_scsi_ctrl_an_resp VirtIOSCSICtrlANResp; 48 typedef struct virtio_scsi_event VirtIOSCSIEvent; 49 typedef struct virtio_scsi_config VirtIOSCSIConfig; 50 51 struct VirtIOSCSIConf { 52 uint32_t num_queues; 53 uint32_t virtqueue_size; 54 bool worker_per_virtqueue; 55 bool seg_max_adjust; 56 uint32_t max_sectors; 57 uint32_t cmd_per_lun; 58 char *vhostfd; 59 char *wwpn; 60 CharBackend chardev; 61 uint32_t boot_tpgt; 62 IOThread *iothread; 63 }; 64 65 struct VirtIOSCSI; 66 67 struct VirtIOSCSICommon { 68 VirtIODevice parent_obj; 69 VirtIOSCSIConf conf; 70 71 uint32_t sense_size; 72 uint32_t cdb_size; 73 VirtQueue *ctrl_vq; 74 VirtQueue *event_vq; 75 VirtQueue **cmd_vqs; 76 }; 77 78 struct VirtIOSCSIReq; 79 80 struct VirtIOSCSI { 81 VirtIOSCSICommon parent_obj; 82 83 SCSIBus bus; 84 int resetting; /* written from main loop thread, read from any thread */ 85 bool events_dropped; 86 87 /* 88 * TMFs deferred to main loop BH. These fields are protected by 89 * tmf_bh_lock. 90 */ 91 QemuMutex tmf_bh_lock; 92 QEMUBH *tmf_bh; 93 QTAILQ_HEAD(, VirtIOSCSIReq) tmf_bh_list; 94 95 /* Fields for dataplane below */ 96 AioContext *ctx; /* one iothread per virtio-scsi-pci for now */ 97 98 bool dataplane_started; 99 bool dataplane_starting; 100 bool dataplane_stopping; 101 bool dataplane_fenced; 102 uint32_t host_features; 103 }; 104 105 void virtio_scsi_common_realize(DeviceState *dev, 106 VirtIOHandleOutput ctrl, 107 VirtIOHandleOutput evt, 108 VirtIOHandleOutput cmd, 109 Error **errp); 110 111 void virtio_scsi_common_unrealize(DeviceState *dev); 112 113 void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp); 114 int virtio_scsi_dataplane_start(VirtIODevice *s); 115 void virtio_scsi_dataplane_stop(VirtIODevice *s); 116 117 #endif /* QEMU_VIRTIO_SCSI_H */ 118