From 292c8e50d540735c601886acc13eb0c117ee94f8 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 29 Mar 2013 01:08:15 +0000 Subject: virtio-scsi: create VirtIOSCSICommon This patch refactors existing virtio-scsi code into VirtIOSCSICommon in order to allow virtio_scsi_init_common() to be used by both internal virtio_scsi_init() and external vhost-scsi-pci code. Cc: Michael S. Tsirkin Cc: Asias He Signed-off-by: Paolo Bonzini --- hw/scsi/virtio-scsi.c | 212 +++++++++++++++++--------------------------------- 1 file changed, 72 insertions(+), 140 deletions(-) (limited to 'hw/scsi/virtio-scsi.c') diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index ead7cda13d..051daeac55 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -19,118 +19,6 @@ #include #include -#define VIRTIO_SCSI_VQ_SIZE 128 -#define VIRTIO_SCSI_CDB_SIZE 32 -#define VIRTIO_SCSI_SENSE_SIZE 96 -#define VIRTIO_SCSI_MAX_CHANNEL 0 -#define VIRTIO_SCSI_MAX_TARGET 255 -#define VIRTIO_SCSI_MAX_LUN 16383 - -/* Response codes */ -#define VIRTIO_SCSI_S_OK 0 -#define VIRTIO_SCSI_S_OVERRUN 1 -#define VIRTIO_SCSI_S_ABORTED 2 -#define VIRTIO_SCSI_S_BAD_TARGET 3 -#define VIRTIO_SCSI_S_RESET 4 -#define VIRTIO_SCSI_S_BUSY 5 -#define VIRTIO_SCSI_S_TRANSPORT_FAILURE 6 -#define VIRTIO_SCSI_S_TARGET_FAILURE 7 -#define VIRTIO_SCSI_S_NEXUS_FAILURE 8 -#define VIRTIO_SCSI_S_FAILURE 9 -#define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED 10 -#define VIRTIO_SCSI_S_FUNCTION_REJECTED 11 -#define VIRTIO_SCSI_S_INCORRECT_LUN 12 - -/* Controlq type codes. */ -#define VIRTIO_SCSI_T_TMF 0 -#define VIRTIO_SCSI_T_AN_QUERY 1 -#define VIRTIO_SCSI_T_AN_SUBSCRIBE 2 - -/* Valid TMF subtypes. */ -#define VIRTIO_SCSI_T_TMF_ABORT_TASK 0 -#define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET 1 -#define VIRTIO_SCSI_T_TMF_CLEAR_ACA 2 -#define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET 3 -#define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET 4 -#define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET 5 -#define VIRTIO_SCSI_T_TMF_QUERY_TASK 6 -#define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET 7 - -/* Events. */ -#define VIRTIO_SCSI_T_EVENTS_MISSED 0x80000000 -#define VIRTIO_SCSI_T_NO_EVENT 0 -#define VIRTIO_SCSI_T_TRANSPORT_RESET 1 -#define VIRTIO_SCSI_T_ASYNC_NOTIFY 2 -#define VIRTIO_SCSI_T_PARAM_CHANGE 3 - -/* Reasons for transport reset event */ -#define VIRTIO_SCSI_EVT_RESET_HARD 0 -#define VIRTIO_SCSI_EVT_RESET_RESCAN 1 -#define VIRTIO_SCSI_EVT_RESET_REMOVED 2 - -/* SCSI command request, followed by data-out */ -typedef struct { - uint8_t lun[8]; /* Logical Unit Number */ - uint64_t tag; /* Command identifier */ - uint8_t task_attr; /* Task attribute */ - uint8_t prio; - uint8_t crn; - uint8_t cdb[]; -} QEMU_PACKED VirtIOSCSICmdReq; - -/* Response, followed by sense data and data-in */ -typedef struct { - uint32_t sense_len; /* Sense data length */ - uint32_t resid; /* Residual bytes in data buffer */ - uint16_t status_qualifier; /* Status qualifier */ - uint8_t status; /* Command completion status */ - uint8_t response; /* Response values */ - uint8_t sense[]; -} QEMU_PACKED VirtIOSCSICmdResp; - -/* Task Management Request */ -typedef struct { - uint32_t type; - uint32_t subtype; - uint8_t lun[8]; - uint64_t tag; -} QEMU_PACKED VirtIOSCSICtrlTMFReq; - -typedef struct { - uint8_t response; -} QEMU_PACKED VirtIOSCSICtrlTMFResp; - -/* Asynchronous notification query/subscription */ -typedef struct { - uint32_t type; - uint8_t lun[8]; - uint32_t event_requested; -} QEMU_PACKED VirtIOSCSICtrlANReq; - -typedef struct { - uint32_t event_actual; - uint8_t response; -} QEMU_PACKED VirtIOSCSICtrlANResp; - -typedef struct { - uint32_t event; - uint8_t lun[8]; - uint32_t reason; -} QEMU_PACKED VirtIOSCSIEvent; - -typedef struct { - uint32_t num_queues; - uint32_t seg_max; - uint32_t max_sectors; - uint32_t cmd_per_lun; - uint32_t event_info_size; - uint32_t sense_size; - uint32_t cdb_size; - uint16_t max_channel; - uint16_t max_target; - uint32_t max_lun; -} QEMU_PACKED VirtIOSCSIConfig; - typedef struct VirtIOSCSIReq { VirtIOSCSI *dev; VirtQueue *vq; @@ -237,9 +125,10 @@ static VirtIOSCSIReq *virtio_scsi_pop_req(VirtIOSCSI *s, VirtQueue *vq) static void virtio_scsi_save_request(QEMUFile *f, SCSIRequest *sreq) { VirtIOSCSIReq *req = sreq->hba_private; + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(req->dev); uint32_t n = virtio_queue_get_id(req->vq) - 2; - assert(n < req->dev->conf.num_queues); + assert(n < vs->conf.num_queues); qemu_put_be32s(f, &n); qemu_put_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem)); } @@ -248,14 +137,15 @@ static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq) { SCSIBus *bus = sreq->bus; VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); VirtIOSCSIReq *req; uint32_t n; req = g_malloc(sizeof(*req)); qemu_get_be32s(f, &n); - assert(n < s->conf.num_queues); + assert(n < vs->conf.num_queues); qemu_get_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem)); - virtio_scsi_parse_req(s, s->cmd_vqs[n], req); + virtio_scsi_parse_req(s, vs->cmd_vqs[n], req); scsi_req_ref(sreq); req->sreq = sreq; @@ -457,7 +347,10 @@ static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req) static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq) { + /* use non-QOM casts in the data path */ VirtIOSCSI *s = (VirtIOSCSI *)vdev; + VirtIOSCSICommon *vs = &s->parent_obj; + VirtIOSCSIReq *req; int n; @@ -470,8 +363,8 @@ static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq) out_size = req->elem.out_sg[0].iov_len; in_size = req->elem.in_sg[0].iov_len; - if (out_size < sizeof(VirtIOSCSICmdReq) + s->cdb_size || - in_size < sizeof(VirtIOSCSICmdResp) + s->sense_size) { + if (out_size < sizeof(VirtIOSCSICmdReq) + vs->cdb_size || + in_size < sizeof(VirtIOSCSICmdResp) + vs->sense_size) { virtio_scsi_bad_req(); } @@ -513,7 +406,7 @@ static void virtio_scsi_get_config(VirtIODevice *vdev, uint8_t *config) { VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; - VirtIOSCSI *s = (VirtIOSCSI *)vdev; + VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(vdev); stl_raw(&scsiconf->num_queues, s->conf.num_queues); stl_raw(&scsiconf->seg_max, 128 - 2); @@ -531,7 +424,7 @@ static void virtio_scsi_set_config(VirtIODevice *vdev, const uint8_t *config) { VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; - VirtIOSCSI *s = (VirtIOSCSI *)vdev; + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); if ((uint32_t) ldl_raw(&scsiconf->sense_size) >= 65536 || (uint32_t) ldl_raw(&scsiconf->cdb_size) >= 256) { @@ -539,8 +432,8 @@ static void virtio_scsi_set_config(VirtIODevice *vdev, exit(1); } - s->sense_size = ldl_raw(&scsiconf->sense_size); - s->cdb_size = ldl_raw(&scsiconf->cdb_size); + vs->sense_size = ldl_raw(&scsiconf->sense_size); + vs->cdb_size = ldl_raw(&scsiconf->cdb_size); } static uint32_t virtio_scsi_get_features(VirtIODevice *vdev, @@ -551,14 +444,15 @@ static uint32_t virtio_scsi_get_features(VirtIODevice *vdev, static void virtio_scsi_reset(VirtIODevice *vdev) { - VirtIOSCSI *s = (VirtIOSCSI *)vdev; + VirtIOSCSI *s = VIRTIO_SCSI(vdev); + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); s->resetting++; qbus_reset_all(&s->bus.qbus); s->resetting--; - s->sense_size = VIRTIO_SCSI_SENSE_SIZE; - s->cdb_size = VIRTIO_SCSI_CDB_SIZE; + vs->sense_size = VIRTIO_SCSI_SENSE_SIZE; + vs->cdb_size = VIRTIO_SCSI_CDB_SIZE; s->events_dropped = false; } @@ -586,7 +480,8 @@ static int virtio_scsi_load(QEMUFile *f, void *opaque, int version_id) static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev, uint32_t event, uint32_t reason) { - VirtIOSCSIReq *req = virtio_scsi_pop_req(s, s->event_vq); + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s); + VirtIOSCSIReq *req = virtio_scsi_pop_req(s, vs->event_vq); VirtIOSCSIEvent *evt; VirtIODevice *vdev = VIRTIO_DEVICE(s); int in_size; @@ -692,23 +587,19 @@ static struct SCSIBusInfo virtio_scsi_scsi_info = { .load_request = virtio_scsi_load_request, }; -static int virtio_scsi_device_init(VirtIODevice *vdev) +int virtio_scsi_common_init(VirtIOSCSICommon *s) { - DeviceState *qdev = DEVICE(vdev); - VirtIOSCSI *s = VIRTIO_SCSI(vdev); - static int virtio_scsi_id; + VirtIODevice *vdev = VIRTIO_DEVICE(s); int i; virtio_init(VIRTIO_DEVICE(s), "virtio-scsi", VIRTIO_ID_SCSI, sizeof(VirtIOSCSIConfig)); s->cmd_vqs = g_malloc0(s->conf.num_queues * sizeof(VirtQueue *)); + s->sense_size = VIRTIO_SCSI_SENSE_SIZE; + s->cdb_size = VIRTIO_SCSI_CDB_SIZE; - /* TODO set up vdev function pointers */ vdev->get_config = virtio_scsi_get_config; - vdev->set_config = virtio_scsi_set_config; - vdev->get_features = virtio_scsi_get_features; - vdev->reset = virtio_scsi_reset; s->ctrl_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, virtio_scsi_handle_ctrl); @@ -719,6 +610,26 @@ static int virtio_scsi_device_init(VirtIODevice *vdev) virtio_scsi_handle_cmd); } + return 0; +} + +static int virtio_scsi_device_init(VirtIODevice *vdev) +{ + DeviceState *qdev = DEVICE(vdev); + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(vdev); + VirtIOSCSI *s = VIRTIO_SCSI(vdev); + static int virtio_scsi_id; + int ret; + + ret = virtio_scsi_common_init(vs); + if (ret < 0) { + return ret; + } + + vdev->get_features = virtio_scsi_get_features; + vdev->set_config = virtio_scsi_set_config; + vdev->reset = virtio_scsi_reset; + scsi_bus_new(&s->bus, qdev, &virtio_scsi_scsi_info); if (!qdev->hotplugged) { scsi_bus_legacy_handle_cmdline(&s->bus); @@ -730,22 +641,36 @@ static int virtio_scsi_device_init(VirtIODevice *vdev) return 0; } +int virtio_scsi_common_exit(VirtIOSCSICommon *vs) +{ + VirtIODevice *vdev = VIRTIO_DEVICE(vs); + + g_free(vs->cmd_vqs); + virtio_common_cleanup(vdev); + return 0; +} + static int virtio_scsi_device_exit(DeviceState *qdev) { VirtIOSCSI *s = VIRTIO_SCSI(qdev); - VirtIODevice *vdev = VIRTIO_DEVICE(qdev); + VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(qdev); unregister_savevm(qdev, "virtio-scsi", s); - g_free(s->cmd_vqs); - virtio_common_cleanup(vdev); - return 0; + return virtio_scsi_common_exit(vs); } static Property virtio_scsi_properties[] = { - DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSI, conf), + DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSI, parent_obj.conf), DEFINE_PROP_END_OF_LIST(), }; +static void virtio_scsi_common_class_init(ObjectClass *klass, void *data) +{ + VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); + + vdc->get_config = virtio_scsi_get_config; +} + static void virtio_scsi_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); @@ -753,21 +678,28 @@ static void virtio_scsi_class_init(ObjectClass *klass, void *data) dc->exit = virtio_scsi_device_exit; dc->props = virtio_scsi_properties; vdc->init = virtio_scsi_device_init; - vdc->get_config = virtio_scsi_get_config; vdc->set_config = virtio_scsi_set_config; vdc->get_features = virtio_scsi_get_features; vdc->reset = virtio_scsi_reset; } +static const TypeInfo virtio_scsi_common_info = { + .name = TYPE_VIRTIO_SCSI_COMMON, + .parent = TYPE_VIRTIO_DEVICE, + .instance_size = sizeof(VirtIOSCSICommon), + .class_init = virtio_scsi_common_class_init, +}; + static const TypeInfo virtio_scsi_info = { .name = TYPE_VIRTIO_SCSI, - .parent = TYPE_VIRTIO_DEVICE, + .parent = TYPE_VIRTIO_SCSI_COMMON, .instance_size = sizeof(VirtIOSCSI), .class_init = virtio_scsi_class_init, }; static void virtio_register_types(void) { + type_register_static(&virtio_scsi_common_info); type_register_static(&virtio_scsi_info); } -- cgit v1.2.1