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/pci/pci.h" 24 #include "hw/scsi/scsi.h" 25 #include "chardev/char-fe.h" 26 #include "sysemu/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 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 VirtIOSCSI { 79 VirtIOSCSICommon parent_obj; 80 81 SCSIBus bus; 82 int resetting; 83 bool events_dropped; 84 85 /* Fields for dataplane below */ 86 AioContext *ctx; /* one iothread per virtio-scsi-pci for now */ 87 88 bool dataplane_started; 89 bool dataplane_starting; 90 bool dataplane_stopping; 91 bool dataplane_fenced; 92 uint32_t host_features; 93 }; 94 95 static inline void virtio_scsi_acquire(VirtIOSCSI *s) 96 { 97 if (s->ctx) { 98 aio_context_acquire(s->ctx); 99 } 100 } 101 102 static inline void virtio_scsi_release(VirtIOSCSI *s) 103 { 104 if (s->ctx) { 105 aio_context_release(s->ctx); 106 } 107 } 108 109 void virtio_scsi_common_realize(DeviceState *dev, 110 VirtIOHandleOutput ctrl, 111 VirtIOHandleOutput evt, 112 VirtIOHandleOutput cmd, 113 Error **errp); 114 115 void virtio_scsi_common_unrealize(DeviceState *dev); 116 117 void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp); 118 int virtio_scsi_dataplane_start(VirtIODevice *s); 119 void virtio_scsi_dataplane_stop(VirtIODevice *s); 120 121 #endif /* QEMU_VIRTIO_SCSI_H */ 122