diff options
Diffstat (limited to 'hw/virtio-scsi.c')
| -rw-r--r-- | hw/virtio-scsi.c | 774 |
1 files changed, 0 insertions, 774 deletions
diff --git a/hw/virtio-scsi.c b/hw/virtio-scsi.c deleted file mode 100644 index 06a58a6..0000000 --- a/hw/virtio-scsi.c +++ /dev/null @@ -1,774 +0,0 @@ -/* - * Virtio SCSI HBA - * - * Copyright IBM, Corp. 2010 - * Copyright Red Hat, Inc. 2011 - * - * Authors: - * Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> - * Paolo Bonzini <pbonzini@redhat.com> - * - * This work is licensed under the terms of the GNU GPL, version 2 or later. - * See the COPYING file in the top-level directory. - * - */ - -#include "hw/virtio-scsi.h" -#include "qemu/error-report.h" -#include <hw/scsi.h> -#include <hw/scsi-defs.h> -#include "hw/virtio-bus.h" - -#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; - VirtQueueElement elem; - QEMUSGList qsgl; - SCSIRequest *sreq; - union { - char *buf; - VirtIOSCSICmdReq *cmd; - VirtIOSCSICtrlTMFReq *tmf; - VirtIOSCSICtrlANReq *an; - } req; - union { - char *buf; - VirtIOSCSICmdResp *cmd; - VirtIOSCSICtrlTMFResp *tmf; - VirtIOSCSICtrlANResp *an; - VirtIOSCSIEvent *event; - } resp; -} VirtIOSCSIReq; - -static inline int virtio_scsi_get_lun(uint8_t *lun) -{ - return ((lun[2] << 8) | lun[3]) & 0x3FFF; -} - -static inline SCSIDevice *virtio_scsi_device_find(VirtIOSCSI *s, uint8_t *lun) -{ - if (lun[0] != 1) { - return NULL; - } - if (lun[2] != 0 && !(lun[2] >= 0x40 && lun[2] < 0x80)) { - return NULL; - } - return scsi_device_find(&s->bus, 0, lun[1], virtio_scsi_get_lun(lun)); -} - -static void virtio_scsi_complete_req(VirtIOSCSIReq *req) -{ - VirtIOSCSI *s = req->dev; - VirtQueue *vq = req->vq; - VirtIODevice *vdev = VIRTIO_DEVICE(s); - virtqueue_push(vq, &req->elem, req->qsgl.size + req->elem.in_sg[0].iov_len); - qemu_sglist_destroy(&req->qsgl); - if (req->sreq) { - req->sreq->hba_private = NULL; - scsi_req_unref(req->sreq); - } - g_free(req); - virtio_notify(vdev, vq); -} - -static void virtio_scsi_bad_req(void) -{ - error_report("wrong size for virtio-scsi headers"); - exit(1); -} - -static void qemu_sgl_init_external(QEMUSGList *qsgl, struct iovec *sg, - hwaddr *addr, int num) -{ - qemu_sglist_init(qsgl, num, &dma_context_memory); - while (num--) { - qemu_sglist_add(qsgl, *(addr++), (sg++)->iov_len); - } -} - -static void virtio_scsi_parse_req(VirtIOSCSI *s, VirtQueue *vq, - VirtIOSCSIReq *req) -{ - assert(req->elem.in_num); - req->vq = vq; - req->dev = s; - req->sreq = NULL; - if (req->elem.out_num) { - req->req.buf = req->elem.out_sg[0].iov_base; - } - req->resp.buf = req->elem.in_sg[0].iov_base; - - if (req->elem.out_num > 1) { - qemu_sgl_init_external(&req->qsgl, &req->elem.out_sg[1], - &req->elem.out_addr[1], - req->elem.out_num - 1); - } else { - qemu_sgl_init_external(&req->qsgl, &req->elem.in_sg[1], - &req->elem.in_addr[1], - req->elem.in_num - 1); - } -} - -static VirtIOSCSIReq *virtio_scsi_pop_req(VirtIOSCSI *s, VirtQueue *vq) -{ - VirtIOSCSIReq *req; - req = g_malloc(sizeof(*req)); - if (!virtqueue_pop(vq, &req->elem)) { - g_free(req); - return NULL; - } - - virtio_scsi_parse_req(s, vq, req); - return req; -} - -static void virtio_scsi_save_request(QEMUFile *f, SCSIRequest *sreq) -{ - VirtIOSCSIReq *req = sreq->hba_private; - uint32_t n = virtio_queue_get_id(req->vq) - 2; - - assert(n < req->dev->conf.num_queues); - qemu_put_be32s(f, &n); - qemu_put_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem)); -} - -static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq) -{ - SCSIBus *bus = sreq->bus; - VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); - VirtIOSCSIReq *req; - uint32_t n; - - req = g_malloc(sizeof(*req)); - qemu_get_be32s(f, &n); - assert(n < s->conf.num_queues); - qemu_get_buffer(f, (unsigned char *)&req->elem, sizeof(req->elem)); - virtio_scsi_parse_req(s, s->cmd_vqs[n], req); - - scsi_req_ref(sreq); - req->sreq = sreq; - if (req->sreq->cmd.mode != SCSI_XFER_NONE) { - int req_mode = - (req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV); - - assert(req->sreq->cmd.mode == req_mode); - } - return req; -} - -static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req) -{ - SCSIDevice *d = virtio_scsi_device_find(s, req->req.tmf->lun); - SCSIRequest *r, *next; - BusChild *kid; - int target; - - /* Here VIRTIO_SCSI_S_OK means "FUNCTION COMPLETE". */ - req->resp.tmf->response = VIRTIO_SCSI_S_OK; - - switch (req->req.tmf->subtype) { - case VIRTIO_SCSI_T_TMF_ABORT_TASK: - case VIRTIO_SCSI_T_TMF_QUERY_TASK: - if (!d) { - goto fail; - } - if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) { - goto incorrect_lun; - } - QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { - VirtIOSCSIReq *cmd_req = r->hba_private; - if (cmd_req && cmd_req->req.cmd->tag == req->req.tmf->tag) { - break; - } - } - if (r) { - /* - * Assert that the request has not been completed yet, we - * check for it in the loop above. - */ - assert(r->hba_private); - if (req->req.tmf->subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK) { - /* "If the specified command is present in the task set, then - * return a service response set to FUNCTION SUCCEEDED". - */ - req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; - } else { - scsi_req_cancel(r); - } - } - break; - - case VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET: - if (!d) { - goto fail; - } - if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) { - goto incorrect_lun; - } - s->resetting++; - qdev_reset_all(&d->qdev); - s->resetting--; - break; - - case VIRTIO_SCSI_T_TMF_ABORT_TASK_SET: - case VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET: - case VIRTIO_SCSI_T_TMF_QUERY_TASK_SET: - if (!d) { - goto fail; - } - if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) { - goto incorrect_lun; - } - QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) { - if (r->hba_private) { - if (req->req.tmf->subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK_SET) { - /* "If there is any command present in the task set, then - * return a service response set to FUNCTION SUCCEEDED". - */ - req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED; - break; - } else { - scsi_req_cancel(r); - } - } - } - break; - - case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET: - target = req->req.tmf->lun[1]; - s->resetting++; - QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) { - d = DO_UPCAST(SCSIDevice, qdev, kid->child); - if (d->channel == 0 && d->id == target) { - qdev_reset_all(&d->qdev); - } - } - s->resetting--; - break; - - case VIRTIO_SCSI_T_TMF_CLEAR_ACA: - default: - req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_REJECTED; - break; - } - - return; - -incorrect_lun: - req->resp.tmf->response = VIRTIO_SCSI_S_INCORRECT_LUN; - return; - -fail: - req->resp.tmf->response = VIRTIO_SCSI_S_BAD_TARGET; -} - -static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) -{ - VirtIOSCSI *s = (VirtIOSCSI *)vdev; - VirtIOSCSIReq *req; - - while ((req = virtio_scsi_pop_req(s, vq))) { - int out_size, in_size; - if (req->elem.out_num < 1 || req->elem.in_num < 1) { - virtio_scsi_bad_req(); - continue; - } - - out_size = req->elem.out_sg[0].iov_len; - in_size = req->elem.in_sg[0].iov_len; - if (req->req.tmf->type == VIRTIO_SCSI_T_TMF) { - if (out_size < sizeof(VirtIOSCSICtrlTMFReq) || - in_size < sizeof(VirtIOSCSICtrlTMFResp)) { - virtio_scsi_bad_req(); - } - virtio_scsi_do_tmf(s, req); - - } else if (req->req.tmf->type == VIRTIO_SCSI_T_AN_QUERY || - req->req.tmf->type == VIRTIO_SCSI_T_AN_SUBSCRIBE) { - if (out_size < sizeof(VirtIOSCSICtrlANReq) || - in_size < sizeof(VirtIOSCSICtrlANResp)) { - virtio_scsi_bad_req(); - } - req->resp.an->event_actual = 0; - req->resp.an->response = VIRTIO_SCSI_S_OK; - } - virtio_scsi_complete_req(req); - } -} - -static void virtio_scsi_command_complete(SCSIRequest *r, uint32_t status, - size_t resid) -{ - VirtIOSCSIReq *req = r->hba_private; - uint32_t sense_len; - - req->resp.cmd->response = VIRTIO_SCSI_S_OK; - req->resp.cmd->status = status; - if (req->resp.cmd->status == GOOD) { - req->resp.cmd->resid = tswap32(resid); - } else { - req->resp.cmd->resid = 0; - sense_len = scsi_req_get_sense(r, req->resp.cmd->sense, - VIRTIO_SCSI_SENSE_SIZE); - req->resp.cmd->sense_len = tswap32(sense_len); - } - virtio_scsi_complete_req(req); -} - -static QEMUSGList *virtio_scsi_get_sg_list(SCSIRequest *r) -{ - VirtIOSCSIReq *req = r->hba_private; - - return &req->qsgl; -} - -static void virtio_scsi_request_cancelled(SCSIRequest *r) -{ - VirtIOSCSIReq *req = r->hba_private; - - if (!req) { - return; - } - if (req->dev->resetting) { - req->resp.cmd->response = VIRTIO_SCSI_S_RESET; - } else { - req->resp.cmd->response = VIRTIO_SCSI_S_ABORTED; - } - virtio_scsi_complete_req(req); -} - -static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req) -{ - req->resp.cmd->response = VIRTIO_SCSI_S_FAILURE; - virtio_scsi_complete_req(req); -} - -static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq) -{ - VirtIOSCSI *s = (VirtIOSCSI *)vdev; - VirtIOSCSIReq *req; - int n; - - while ((req = virtio_scsi_pop_req(s, vq))) { - SCSIDevice *d; - int out_size, in_size; - if (req->elem.out_num < 1 || req->elem.in_num < 1) { - virtio_scsi_bad_req(); - } - - 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) { - virtio_scsi_bad_req(); - } - - if (req->elem.out_num > 1 && req->elem.in_num > 1) { - virtio_scsi_fail_cmd_req(req); - continue; - } - - d = virtio_scsi_device_find(s, req->req.cmd->lun); - if (!d) { - req->resp.cmd->response = VIRTIO_SCSI_S_BAD_TARGET; - virtio_scsi_complete_req(req); - continue; - } - req->sreq = scsi_req_new(d, req->req.cmd->tag, - virtio_scsi_get_lun(req->req.cmd->lun), - req->req.cmd->cdb, req); - - if (req->sreq->cmd.mode != SCSI_XFER_NONE) { - int req_mode = - (req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV); - - if (req->sreq->cmd.mode != req_mode || - req->sreq->cmd.xfer > req->qsgl.size) { - req->resp.cmd->response = VIRTIO_SCSI_S_OVERRUN; - virtio_scsi_complete_req(req); - continue; - } - } - - n = scsi_req_enqueue(req->sreq); - if (n) { - scsi_req_continue(req->sreq); - } - } -} - -static void virtio_scsi_get_config(VirtIODevice *vdev, - uint8_t *config) -{ - VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; - VirtIOSCSI *s = (VirtIOSCSI *)vdev; - - stl_raw(&scsiconf->num_queues, s->conf.num_queues); - stl_raw(&scsiconf->seg_max, 128 - 2); - stl_raw(&scsiconf->max_sectors, s->conf.max_sectors); - stl_raw(&scsiconf->cmd_per_lun, s->conf.cmd_per_lun); - stl_raw(&scsiconf->event_info_size, sizeof(VirtIOSCSIEvent)); - stl_raw(&scsiconf->sense_size, s->sense_size); - stl_raw(&scsiconf->cdb_size, s->cdb_size); - stw_raw(&scsiconf->max_channel, VIRTIO_SCSI_MAX_CHANNEL); - stw_raw(&scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET); - stl_raw(&scsiconf->max_lun, VIRTIO_SCSI_MAX_LUN); -} - -static void virtio_scsi_set_config(VirtIODevice *vdev, - const uint8_t *config) -{ - VirtIOSCSIConfig *scsiconf = (VirtIOSCSIConfig *)config; - VirtIOSCSI *s = (VirtIOSCSI *)vdev; - - if ((uint32_t) ldl_raw(&scsiconf->sense_size) >= 65536 || - (uint32_t) ldl_raw(&scsiconf->cdb_size) >= 256) { - error_report("bad data written to virtio-scsi configuration space"); - exit(1); - } - - s->sense_size = ldl_raw(&scsiconf->sense_size); - s->cdb_size = ldl_raw(&scsiconf->cdb_size); -} - -static uint32_t virtio_scsi_get_features(VirtIODevice *vdev, - uint32_t requested_features) -{ - return requested_features; -} - -static void virtio_scsi_reset(VirtIODevice *vdev) -{ - VirtIOSCSI *s = (VirtIOSCSI *)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; - s->events_dropped = false; -} - -/* The device does not have anything to save beyond the virtio data. - * Request data is saved with callbacks from SCSI devices. - */ -static void virtio_scsi_save(QEMUFile *f, void *opaque) -{ - VirtIODevice *vdev = VIRTIO_DEVICE(opaque); - virtio_save(vdev, f); -} - -static int virtio_scsi_load(QEMUFile *f, void *opaque, int version_id) -{ - VirtIODevice *vdev = VIRTIO_DEVICE(opaque); - int ret; - - ret = virtio_load(vdev, f); - if (ret) { - return ret; - } - return 0; -} - -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); - VirtIOSCSIEvent *evt; - VirtIODevice *vdev = VIRTIO_DEVICE(s); - int in_size; - - if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) { - return; - } - - if (!req) { - s->events_dropped = true; - return; - } - - if (req->elem.out_num || req->elem.in_num != 1) { - virtio_scsi_bad_req(); - } - - if (s->events_dropped) { - event |= VIRTIO_SCSI_T_EVENTS_MISSED; - s->events_dropped = false; - } - - in_size = req->elem.in_sg[0].iov_len; - if (in_size < sizeof(VirtIOSCSIEvent)) { - virtio_scsi_bad_req(); - } - - evt = req->resp.event; - memset(evt, 0, sizeof(VirtIOSCSIEvent)); - evt->event = event; - evt->reason = reason; - if (!dev) { - assert(event == VIRTIO_SCSI_T_NO_EVENT); - } else { - evt->lun[0] = 1; - evt->lun[1] = dev->id; - - /* Linux wants us to keep the same encoding we use for REPORT LUNS. */ - if (dev->lun >= 256) { - evt->lun[2] = (dev->lun >> 8) | 0x40; - } - evt->lun[3] = dev->lun & 0xFF; - } - virtio_scsi_complete_req(req); -} - -static void virtio_scsi_handle_event(VirtIODevice *vdev, VirtQueue *vq) -{ - VirtIOSCSI *s = VIRTIO_SCSI(vdev); - - if (s->events_dropped) { - virtio_scsi_push_event(s, NULL, VIRTIO_SCSI_T_NO_EVENT, 0); - } -} - -static void virtio_scsi_change(SCSIBus *bus, SCSIDevice *dev, SCSISense sense) -{ - VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); - VirtIODevice *vdev = VIRTIO_DEVICE(s); - - if (((vdev->guest_features >> VIRTIO_SCSI_F_CHANGE) & 1) && - dev->type != TYPE_ROM) { - virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_PARAM_CHANGE, - sense.asc | (sense.ascq << 8)); - } -} - -static void virtio_scsi_hotplug(SCSIBus *bus, SCSIDevice *dev) -{ - VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); - VirtIODevice *vdev = VIRTIO_DEVICE(s); - - if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) { - virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_TRANSPORT_RESET, - VIRTIO_SCSI_EVT_RESET_RESCAN); - } -} - -static void virtio_scsi_hot_unplug(SCSIBus *bus, SCSIDevice *dev) -{ - VirtIOSCSI *s = container_of(bus, VirtIOSCSI, bus); - VirtIODevice *vdev = VIRTIO_DEVICE(s); - - if ((vdev->guest_features >> VIRTIO_SCSI_F_HOTPLUG) & 1) { - virtio_scsi_push_event(s, dev, VIRTIO_SCSI_T_TRANSPORT_RESET, - VIRTIO_SCSI_EVT_RESET_REMOVED); - } -} - -static struct SCSIBusInfo virtio_scsi_scsi_info = { - .tcq = true, - .max_channel = VIRTIO_SCSI_MAX_CHANNEL, - .max_target = VIRTIO_SCSI_MAX_TARGET, - .max_lun = VIRTIO_SCSI_MAX_LUN, - - .complete = virtio_scsi_command_complete, - .cancel = virtio_scsi_request_cancelled, - .change = virtio_scsi_change, - .hotplug = virtio_scsi_hotplug, - .hot_unplug = virtio_scsi_hot_unplug, - .get_sg_list = virtio_scsi_get_sg_list, - .save_request = virtio_scsi_save_request, - .load_request = virtio_scsi_load_request, -}; - -static int virtio_scsi_device_init(VirtIODevice *vdev) -{ - DeviceState *qdev = DEVICE(vdev); - VirtIOSCSI *s = VIRTIO_SCSI(vdev); - static int virtio_scsi_id; - 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 *)); - - /* 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); - s->event_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, - virtio_scsi_handle_event); - for (i = 0; i < s->conf.num_queues; i++) { - s->cmd_vqs[i] = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, - virtio_scsi_handle_cmd); - } - - scsi_bus_new(&s->bus, qdev, &virtio_scsi_scsi_info); - if (!qdev->hotplugged) { - scsi_bus_legacy_handle_cmdline(&s->bus); - } - - register_savevm(qdev, "virtio-scsi", virtio_scsi_id++, 1, - virtio_scsi_save, virtio_scsi_load, s); - - return 0; -} - -static int virtio_scsi_device_exit(DeviceState *qdev) -{ - VirtIOSCSI *s = VIRTIO_SCSI(qdev); - VirtIODevice *vdev = VIRTIO_DEVICE(qdev); - - unregister_savevm(qdev, "virtio-scsi", s); - g_free(s->cmd_vqs); - virtio_common_cleanup(vdev); - return 0; -} - -static Property virtio_scsi_properties[] = { - DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSI, conf), - DEFINE_PROP_END_OF_LIST(), -}; - -static void virtio_scsi_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); - 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_info = { - .name = TYPE_VIRTIO_SCSI, - .parent = TYPE_VIRTIO_DEVICE, - .instance_size = sizeof(VirtIOSCSI), - .class_init = virtio_scsi_class_init, -}; - -static void virtio_register_types(void) -{ - type_register_static(&virtio_scsi_info); -} - -type_init(virtio_register_types) |
