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2012 lines
54 KiB
C
2012 lines
54 KiB
C
#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu/error-report.h"
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#include "qemu/module.h"
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#include "qemu/option.h"
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#include "qemu/hw-version.h"
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#include "hw/qdev-properties.h"
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#include "hw/scsi/scsi.h"
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#include "migration/qemu-file-types.h"
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#include "migration/vmstate.h"
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#include "scsi/constants.h"
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#include "sysemu/block-backend.h"
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#include "sysemu/blockdev.h"
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#include "sysemu/sysemu.h"
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#include "sysemu/runstate.h"
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#include "trace.h"
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#include "sysemu/dma.h"
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#include "qemu/cutils.h"
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static char *scsibus_get_dev_path(DeviceState *dev);
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static char *scsibus_get_fw_dev_path(DeviceState *dev);
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static void scsi_req_dequeue(SCSIRequest *req);
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static uint8_t *scsi_target_alloc_buf(SCSIRequest *req, size_t len);
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static void scsi_target_free_buf(SCSIRequest *req);
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static void scsi_clear_reported_luns_changed(SCSIRequest *req);
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static int next_scsi_bus;
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static SCSIDevice *do_scsi_device_find(SCSIBus *bus,
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int channel, int id, int lun,
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bool include_unrealized)
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{
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BusChild *kid;
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SCSIDevice *retval = NULL;
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QTAILQ_FOREACH_RCU(kid, &bus->qbus.children, sibling) {
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DeviceState *qdev = kid->child;
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SCSIDevice *dev = SCSI_DEVICE(qdev);
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if (dev->channel == channel && dev->id == id) {
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if (dev->lun == lun) {
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retval = dev;
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break;
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}
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/*
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* If we don't find exact match (channel/bus/lun),
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* we will return the first device which matches channel/bus
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*/
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if (!retval) {
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retval = dev;
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}
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}
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}
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/*
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* This function might run on the IO thread and we might race against
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* main thread hot-plugging the device.
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* We assume that as soon as .realized is set to true we can let
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* the user access the device.
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*/
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if (retval && !include_unrealized && !qdev_is_realized(&retval->qdev)) {
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retval = NULL;
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}
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return retval;
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}
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SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun)
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{
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RCU_READ_LOCK_GUARD();
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return do_scsi_device_find(bus, channel, id, lun, false);
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}
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SCSIDevice *scsi_device_get(SCSIBus *bus, int channel, int id, int lun)
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{
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SCSIDevice *d;
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RCU_READ_LOCK_GUARD();
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d = do_scsi_device_find(bus, channel, id, lun, false);
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if (d) {
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object_ref(d);
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}
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return d;
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}
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/*
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* Invoke @fn() for each enqueued request in device @s. Must be called from the
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* main loop thread while the guest is stopped. This is only suitable for
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* vmstate ->put(), use scsi_device_for_each_req_async() for other cases.
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*/
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static void scsi_device_for_each_req_sync(SCSIDevice *s,
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void (*fn)(SCSIRequest *, void *),
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void *opaque)
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{
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SCSIRequest *req;
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SCSIRequest *next_req;
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assert(!runstate_is_running());
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assert(qemu_in_main_thread());
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QTAILQ_FOREACH_SAFE(req, &s->requests, next, next_req) {
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fn(req, opaque);
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}
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}
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typedef struct {
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SCSIDevice *s;
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void (*fn)(SCSIRequest *, void *);
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void *fn_opaque;
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} SCSIDeviceForEachReqAsyncData;
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static void scsi_device_for_each_req_async_bh(void *opaque)
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{
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g_autofree SCSIDeviceForEachReqAsyncData *data = opaque;
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SCSIDevice *s = data->s;
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AioContext *ctx;
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SCSIRequest *req;
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SCSIRequest *next;
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/*
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* The BB cannot have changed contexts between this BH being scheduled and
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* now: BBs' AioContexts, when they have a node attached, can only be
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* changed via bdrv_try_change_aio_context(), in a drained section. While
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* we have the in-flight counter incremented, that drain must block.
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*/
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ctx = blk_get_aio_context(s->conf.blk);
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assert(ctx == qemu_get_current_aio_context());
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QTAILQ_FOREACH_SAFE(req, &s->requests, next, next) {
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data->fn(req, data->fn_opaque);
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}
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/* Drop the reference taken by scsi_device_for_each_req_async() */
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object_unref(OBJECT(s));
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/* Paired with blk_inc_in_flight() in scsi_device_for_each_req_async() */
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blk_dec_in_flight(s->conf.blk);
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}
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/*
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* Schedule @fn() to be invoked for each enqueued request in device @s. @fn()
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* runs in the AioContext that is executing the request.
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* Keeps the BlockBackend's in-flight counter incremented until everything is
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* done, so draining it will settle all scheduled @fn() calls.
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*/
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static void scsi_device_for_each_req_async(SCSIDevice *s,
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void (*fn)(SCSIRequest *, void *),
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void *opaque)
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{
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assert(qemu_in_main_thread());
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SCSIDeviceForEachReqAsyncData *data =
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g_new(SCSIDeviceForEachReqAsyncData, 1);
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data->s = s;
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data->fn = fn;
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data->fn_opaque = opaque;
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/*
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* Hold a reference to the SCSIDevice until
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* scsi_device_for_each_req_async_bh() finishes.
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*/
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object_ref(OBJECT(s));
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/* Paired with blk_dec_in_flight() in scsi_device_for_each_req_async_bh() */
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blk_inc_in_flight(s->conf.blk);
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aio_bh_schedule_oneshot(blk_get_aio_context(s->conf.blk),
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scsi_device_for_each_req_async_bh,
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data);
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}
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static void scsi_device_realize(SCSIDevice *s, Error **errp)
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{
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SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
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if (sc->realize) {
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sc->realize(s, errp);
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}
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}
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static void scsi_device_unrealize(SCSIDevice *s)
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{
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SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
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if (sc->unrealize) {
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sc->unrealize(s);
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}
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}
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int scsi_bus_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
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size_t buf_len, void *hba_private)
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{
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SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
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int rc;
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assert(cmd->len == 0);
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rc = scsi_req_parse_cdb(dev, cmd, buf, buf_len);
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if (bus->info->parse_cdb) {
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rc = bus->info->parse_cdb(dev, cmd, buf, buf_len, hba_private);
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}
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return rc;
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}
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static SCSIRequest *scsi_device_alloc_req(SCSIDevice *s, uint32_t tag, uint32_t lun,
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uint8_t *buf, void *hba_private)
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{
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SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
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if (sc->alloc_req) {
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return sc->alloc_req(s, tag, lun, buf, hba_private);
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}
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return NULL;
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}
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void scsi_device_unit_attention_reported(SCSIDevice *s)
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{
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SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(s);
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if (sc->unit_attention_reported) {
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sc->unit_attention_reported(s);
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}
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}
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/* Create a scsi bus, and attach devices to it. */
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void scsi_bus_init_named(SCSIBus *bus, size_t bus_size, DeviceState *host,
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const SCSIBusInfo *info, const char *bus_name)
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{
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qbus_init(bus, bus_size, TYPE_SCSI_BUS, host, bus_name);
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bus->busnr = next_scsi_bus++;
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bus->info = info;
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qbus_set_bus_hotplug_handler(BUS(bus));
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}
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void scsi_req_retry(SCSIRequest *req)
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{
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req->retry = true;
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}
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/* Called in the AioContext that is executing the request */
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static void scsi_dma_restart_req(SCSIRequest *req, void *opaque)
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{
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scsi_req_ref(req);
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if (req->retry) {
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req->retry = false;
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switch (req->cmd.mode) {
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case SCSI_XFER_FROM_DEV:
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case SCSI_XFER_TO_DEV:
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scsi_req_continue(req);
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break;
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case SCSI_XFER_NONE:
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scsi_req_dequeue(req);
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scsi_req_enqueue(req);
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break;
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}
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}
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scsi_req_unref(req);
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}
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static void scsi_dma_restart_cb(void *opaque, bool running, RunState state)
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{
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SCSIDevice *s = opaque;
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assert(qemu_in_main_thread());
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if (!running) {
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return;
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}
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scsi_device_for_each_req_async(s, scsi_dma_restart_req, NULL);
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}
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static bool scsi_bus_is_address_free(SCSIBus *bus,
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int channel, int target, int lun,
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SCSIDevice **p_dev)
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{
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SCSIDevice *d;
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RCU_READ_LOCK_GUARD();
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d = do_scsi_device_find(bus, channel, target, lun, true);
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if (d && d->lun == lun) {
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if (p_dev) {
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*p_dev = d;
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}
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return false;
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}
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if (p_dev) {
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*p_dev = NULL;
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}
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return true;
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}
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static bool scsi_bus_check_address(BusState *qbus, DeviceState *qdev, Error **errp)
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{
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SCSIDevice *dev = SCSI_DEVICE(qdev);
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SCSIBus *bus = SCSI_BUS(qbus);
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if (dev->channel > bus->info->max_channel) {
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error_setg(errp, "bad scsi channel id: %d", dev->channel);
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return false;
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}
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if (dev->id != -1 && dev->id > bus->info->max_target) {
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error_setg(errp, "bad scsi device id: %d", dev->id);
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return false;
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}
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if (dev->lun != -1 && dev->lun > bus->info->max_lun) {
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error_setg(errp, "bad scsi device lun: %d", dev->lun);
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return false;
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}
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if (dev->id != -1 && dev->lun != -1) {
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SCSIDevice *d;
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if (!scsi_bus_is_address_free(bus, dev->channel, dev->id, dev->lun, &d)) {
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error_setg(errp, "lun already used by '%s'", d->qdev.id);
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return false;
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}
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}
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return true;
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}
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static void scsi_qdev_realize(DeviceState *qdev, Error **errp)
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{
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SCSIDevice *dev = SCSI_DEVICE(qdev);
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SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
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bool is_free;
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Error *local_err = NULL;
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if (dev->id == -1) {
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int id = -1;
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if (dev->lun == -1) {
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dev->lun = 0;
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}
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do {
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is_free = scsi_bus_is_address_free(bus, dev->channel, ++id, dev->lun, NULL);
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} while (!is_free && id < bus->info->max_target);
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if (!is_free) {
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error_setg(errp, "no free target");
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return;
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}
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dev->id = id;
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} else if (dev->lun == -1) {
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int lun = -1;
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do {
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is_free = scsi_bus_is_address_free(bus, dev->channel, dev->id, ++lun, NULL);
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} while (!is_free && lun < bus->info->max_lun);
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if (!is_free) {
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error_setg(errp, "no free lun");
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return;
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}
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dev->lun = lun;
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}
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QTAILQ_INIT(&dev->requests);
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scsi_device_realize(dev, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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return;
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}
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dev->vmsentry = qdev_add_vm_change_state_handler(DEVICE(dev),
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scsi_dma_restart_cb, dev);
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}
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static void scsi_qdev_unrealize(DeviceState *qdev)
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{
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SCSIDevice *dev = SCSI_DEVICE(qdev);
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if (dev->vmsentry) {
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qemu_del_vm_change_state_handler(dev->vmsentry);
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}
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scsi_device_purge_requests(dev, SENSE_CODE(NO_SENSE));
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scsi_device_unrealize(dev);
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blockdev_mark_auto_del(dev->conf.blk);
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}
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/* handle legacy '-drive if=scsi,...' cmd line args */
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SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockBackend *blk,
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int unit, bool removable, BlockConf *conf,
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const char *serial, Error **errp)
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{
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const char *driver;
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char *name;
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DeviceState *dev;
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SCSIDevice *s;
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DriveInfo *dinfo;
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Error *local_err = NULL;
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if (blk_is_sg(blk)) {
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driver = "scsi-generic";
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} else {
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dinfo = blk_legacy_dinfo(blk);
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if (dinfo && dinfo->media_cd) {
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driver = "scsi-cd";
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} else {
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driver = "scsi-hd";
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}
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}
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dev = qdev_new(driver);
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name = g_strdup_printf("legacy[%d]", unit);
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object_property_add_child(OBJECT(bus), name, OBJECT(dev));
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g_free(name);
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s = SCSI_DEVICE(dev);
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s->conf = *conf;
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check_boot_index(conf->bootindex, &local_err);
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if (local_err) {
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object_unparent(OBJECT(dev));
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error_propagate(errp, local_err);
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return NULL;
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}
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add_boot_device_path(conf->bootindex, dev, NULL);
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qdev_prop_set_uint32(dev, "scsi-id", unit);
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if (object_property_find(OBJECT(dev), "removable")) {
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qdev_prop_set_bit(dev, "removable", removable);
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}
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if (serial && object_property_find(OBJECT(dev), "serial")) {
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qdev_prop_set_string(dev, "serial", serial);
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}
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if (!qdev_prop_set_drive_err(dev, "drive", blk, errp)) {
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object_unparent(OBJECT(dev));
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return NULL;
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}
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if (!qdev_realize_and_unref(dev, &bus->qbus, errp)) {
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object_unparent(OBJECT(dev));
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return NULL;
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}
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return s;
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}
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void scsi_bus_legacy_handle_cmdline(SCSIBus *bus)
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{
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Location loc;
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DriveInfo *dinfo;
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int unit;
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BlockConf conf = {
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.bootindex = -1,
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.share_rw = false,
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.rerror = BLOCKDEV_ON_ERROR_AUTO,
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.werror = BLOCKDEV_ON_ERROR_AUTO,
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};
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loc_push_none(&loc);
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for (unit = 0; unit <= bus->info->max_target; unit++) {
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dinfo = drive_get(IF_SCSI, bus->busnr, unit);
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if (dinfo == NULL) {
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continue;
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}
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qemu_opts_loc_restore(dinfo->opts);
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scsi_bus_legacy_add_drive(bus, blk_by_legacy_dinfo(dinfo),
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unit, false, &conf, NULL, &error_fatal);
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}
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loc_pop(&loc);
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}
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static int32_t scsi_invalid_field(SCSIRequest *req, uint8_t *buf)
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{
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scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD));
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scsi_req_complete(req, CHECK_CONDITION);
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return 0;
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}
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static const struct SCSIReqOps reqops_invalid_field = {
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.size = sizeof(SCSIRequest),
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.send_command = scsi_invalid_field
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};
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/* SCSIReqOps implementation for invalid commands. */
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static int32_t scsi_invalid_command(SCSIRequest *req, uint8_t *buf)
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{
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scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE));
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scsi_req_complete(req, CHECK_CONDITION);
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return 0;
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}
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static const struct SCSIReqOps reqops_invalid_opcode = {
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.size = sizeof(SCSIRequest),
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.send_command = scsi_invalid_command
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};
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/* SCSIReqOps implementation for unit attention conditions. */
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static void scsi_fetch_unit_attention_sense(SCSIRequest *req)
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{
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SCSISense *ua = NULL;
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if (req->dev->unit_attention.key == UNIT_ATTENTION) {
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ua = &req->dev->unit_attention;
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} else if (req->bus->unit_attention.key == UNIT_ATTENTION) {
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ua = &req->bus->unit_attention;
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}
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/*
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* Fetch the unit attention sense immediately so that another
|
|
* scsi_req_new does not use reqops_unit_attention.
|
|
*/
|
|
if (ua) {
|
|
scsi_req_build_sense(req, *ua);
|
|
*ua = SENSE_CODE(NO_SENSE);
|
|
}
|
|
}
|
|
|
|
static int32_t scsi_unit_attention(SCSIRequest *req, uint8_t *buf)
|
|
{
|
|
scsi_req_complete(req, CHECK_CONDITION);
|
|
return 0;
|
|
}
|
|
|
|
static const struct SCSIReqOps reqops_unit_attention = {
|
|
.size = sizeof(SCSIRequest),
|
|
.init_req = scsi_fetch_unit_attention_sense,
|
|
.send_command = scsi_unit_attention
|
|
};
|
|
|
|
/* SCSIReqOps implementation for REPORT LUNS and for commands sent to
|
|
an invalid LUN. */
|
|
|
|
typedef struct SCSITargetReq SCSITargetReq;
|
|
|
|
struct SCSITargetReq {
|
|
SCSIRequest req;
|
|
int len;
|
|
uint8_t *buf;
|
|
int buf_len;
|
|
};
|
|
|
|
static void store_lun(uint8_t *outbuf, int lun)
|
|
{
|
|
if (lun < 256) {
|
|
/* Simple logical unit addressing method*/
|
|
outbuf[0] = 0;
|
|
outbuf[1] = lun;
|
|
} else {
|
|
/* Flat space addressing method */
|
|
outbuf[0] = 0x40 | (lun >> 8);
|
|
outbuf[1] = (lun & 255);
|
|
}
|
|
}
|
|
|
|
static bool scsi_target_emulate_report_luns(SCSITargetReq *r)
|
|
{
|
|
BusChild *kid;
|
|
int channel, id;
|
|
uint8_t tmp[8] = {0};
|
|
int len = 0;
|
|
GByteArray *buf;
|
|
|
|
if (r->req.cmd.xfer < 16) {
|
|
return false;
|
|
}
|
|
if (r->req.cmd.buf[2] > 2) {
|
|
return false;
|
|
}
|
|
|
|
/* reserve space for 63 LUNs*/
|
|
buf = g_byte_array_sized_new(512);
|
|
|
|
channel = r->req.dev->channel;
|
|
id = r->req.dev->id;
|
|
|
|
/* add size (will be updated later to correct value */
|
|
g_byte_array_append(buf, tmp, 8);
|
|
len += 8;
|
|
|
|
/* add LUN0 */
|
|
g_byte_array_append(buf, tmp, 8);
|
|
len += 8;
|
|
|
|
WITH_RCU_READ_LOCK_GUARD() {
|
|
QTAILQ_FOREACH_RCU(kid, &r->req.bus->qbus.children, sibling) {
|
|
DeviceState *qdev = kid->child;
|
|
SCSIDevice *dev = SCSI_DEVICE(qdev);
|
|
|
|
if (dev->channel == channel && dev->id == id && dev->lun != 0 &&
|
|
qdev_is_realized(&dev->qdev)) {
|
|
store_lun(tmp, dev->lun);
|
|
g_byte_array_append(buf, tmp, 8);
|
|
len += 8;
|
|
}
|
|
}
|
|
}
|
|
|
|
r->buf_len = len;
|
|
r->buf = g_byte_array_free(buf, FALSE);
|
|
r->len = MIN(len, r->req.cmd.xfer & ~7);
|
|
|
|
/* store the LUN list length */
|
|
stl_be_p(&r->buf[0], len - 8);
|
|
|
|
/*
|
|
* If a REPORT LUNS command enters the enabled command state, [...]
|
|
* the device server shall clear any pending unit attention condition
|
|
* with an additional sense code of REPORTED LUNS DATA HAS CHANGED.
|
|
*/
|
|
scsi_clear_reported_luns_changed(&r->req);
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool scsi_target_emulate_inquiry(SCSITargetReq *r)
|
|
{
|
|
assert(r->req.dev->lun != r->req.lun);
|
|
|
|
scsi_target_alloc_buf(&r->req, SCSI_INQUIRY_LEN);
|
|
|
|
if (r->req.cmd.buf[1] & 0x2) {
|
|
/* Command support data - optional, not implemented */
|
|
return false;
|
|
}
|
|
|
|
if (r->req.cmd.buf[1] & 0x1) {
|
|
/* Vital product data */
|
|
uint8_t page_code = r->req.cmd.buf[2];
|
|
r->buf[r->len++] = page_code ; /* this page */
|
|
r->buf[r->len++] = 0x00;
|
|
|
|
switch (page_code) {
|
|
case 0x00: /* Supported page codes, mandatory */
|
|
{
|
|
int pages;
|
|
pages = r->len++;
|
|
r->buf[r->len++] = 0x00; /* list of supported pages (this page) */
|
|
r->buf[pages] = r->len - pages - 1; /* number of pages */
|
|
break;
|
|
}
|
|
default:
|
|
return false;
|
|
}
|
|
/* done with EVPD */
|
|
assert(r->len < r->buf_len);
|
|
r->len = MIN(r->req.cmd.xfer, r->len);
|
|
return true;
|
|
}
|
|
|
|
/* Standard INQUIRY data */
|
|
if (r->req.cmd.buf[2] != 0) {
|
|
return false;
|
|
}
|
|
|
|
/* PAGE CODE == 0 */
|
|
r->len = MIN(r->req.cmd.xfer, SCSI_INQUIRY_LEN);
|
|
memset(r->buf, 0, r->len);
|
|
if (r->req.lun != 0) {
|
|
r->buf[0] = TYPE_NO_LUN;
|
|
} else {
|
|
r->buf[0] = TYPE_NOT_PRESENT | TYPE_INACTIVE;
|
|
r->buf[2] = 5; /* Version */
|
|
r->buf[3] = 2 | 0x10; /* HiSup, response data format */
|
|
r->buf[4] = r->len - 5; /* Additional Length = (Len - 1) - 4 */
|
|
r->buf[7] = 0x10 | (r->req.bus->info->tcq ? 0x02 : 0); /* Sync, TCQ. */
|
|
memcpy(&r->buf[8], "QEMU ", 8);
|
|
memcpy(&r->buf[16], "QEMU TARGET ", 16);
|
|
pstrcpy((char *) &r->buf[32], 4, qemu_hw_version());
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static size_t scsi_sense_len(SCSIRequest *req)
|
|
{
|
|
if (req->dev->type == TYPE_SCANNER)
|
|
return SCSI_SENSE_LEN_SCANNER;
|
|
else
|
|
return SCSI_SENSE_LEN;
|
|
}
|
|
|
|
static int32_t scsi_target_send_command(SCSIRequest *req, uint8_t *buf)
|
|
{
|
|
SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
|
|
int fixed_sense = (req->cmd.buf[1] & 1) == 0;
|
|
|
|
if (req->lun != 0 &&
|
|
buf[0] != INQUIRY && buf[0] != REQUEST_SENSE) {
|
|
scsi_req_build_sense(req, SENSE_CODE(LUN_NOT_SUPPORTED));
|
|
scsi_req_complete(req, CHECK_CONDITION);
|
|
return 0;
|
|
}
|
|
switch (buf[0]) {
|
|
case REPORT_LUNS:
|
|
if (!scsi_target_emulate_report_luns(r)) {
|
|
goto illegal_request;
|
|
}
|
|
break;
|
|
case INQUIRY:
|
|
if (!scsi_target_emulate_inquiry(r)) {
|
|
goto illegal_request;
|
|
}
|
|
break;
|
|
case REQUEST_SENSE:
|
|
scsi_target_alloc_buf(&r->req, scsi_sense_len(req));
|
|
if (req->lun != 0) {
|
|
const struct SCSISense sense = SENSE_CODE(LUN_NOT_SUPPORTED);
|
|
|
|
r->len = scsi_build_sense_buf(r->buf, req->cmd.xfer,
|
|
sense, fixed_sense);
|
|
} else {
|
|
r->len = scsi_device_get_sense(r->req.dev, r->buf,
|
|
MIN(req->cmd.xfer, r->buf_len),
|
|
fixed_sense);
|
|
}
|
|
if (r->req.dev->sense_is_ua) {
|
|
scsi_device_unit_attention_reported(req->dev);
|
|
r->req.dev->sense_len = 0;
|
|
r->req.dev->sense_is_ua = false;
|
|
}
|
|
break;
|
|
case TEST_UNIT_READY:
|
|
break;
|
|
default:
|
|
scsi_req_build_sense(req, SENSE_CODE(INVALID_OPCODE));
|
|
scsi_req_complete(req, CHECK_CONDITION);
|
|
return 0;
|
|
illegal_request:
|
|
scsi_req_build_sense(req, SENSE_CODE(INVALID_FIELD));
|
|
scsi_req_complete(req, CHECK_CONDITION);
|
|
return 0;
|
|
}
|
|
|
|
if (!r->len) {
|
|
scsi_req_complete(req, GOOD);
|
|
}
|
|
return r->len;
|
|
}
|
|
|
|
static void scsi_target_read_data(SCSIRequest *req)
|
|
{
|
|
SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
|
|
uint32_t n;
|
|
|
|
n = r->len;
|
|
if (n > 0) {
|
|
r->len = 0;
|
|
scsi_req_data(&r->req, n);
|
|
} else {
|
|
scsi_req_complete(&r->req, GOOD);
|
|
}
|
|
}
|
|
|
|
static uint8_t *scsi_target_get_buf(SCSIRequest *req)
|
|
{
|
|
SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
|
|
|
|
return r->buf;
|
|
}
|
|
|
|
static uint8_t *scsi_target_alloc_buf(SCSIRequest *req, size_t len)
|
|
{
|
|
SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
|
|
|
|
r->buf = g_malloc(len);
|
|
r->buf_len = len;
|
|
|
|
return r->buf;
|
|
}
|
|
|
|
static void scsi_target_free_buf(SCSIRequest *req)
|
|
{
|
|
SCSITargetReq *r = DO_UPCAST(SCSITargetReq, req, req);
|
|
|
|
g_free(r->buf);
|
|
}
|
|
|
|
static const struct SCSIReqOps reqops_target_command = {
|
|
.size = sizeof(SCSITargetReq),
|
|
.send_command = scsi_target_send_command,
|
|
.read_data = scsi_target_read_data,
|
|
.get_buf = scsi_target_get_buf,
|
|
.free_req = scsi_target_free_buf,
|
|
};
|
|
|
|
|
|
SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
|
|
uint32_t tag, uint32_t lun, void *hba_private)
|
|
{
|
|
SCSIRequest *req;
|
|
SCSIBus *bus = scsi_bus_from_device(d);
|
|
BusState *qbus = BUS(bus);
|
|
const int memset_off = offsetof(SCSIRequest, sense)
|
|
+ sizeof(req->sense);
|
|
|
|
req = g_malloc(reqops->size);
|
|
memset((uint8_t *)req + memset_off, 0, reqops->size - memset_off);
|
|
req->refcount = 1;
|
|
req->bus = bus;
|
|
req->dev = d;
|
|
req->tag = tag;
|
|
req->lun = lun;
|
|
req->hba_private = hba_private;
|
|
req->status = -1;
|
|
req->host_status = -1;
|
|
req->ops = reqops;
|
|
object_ref(OBJECT(d));
|
|
object_ref(OBJECT(qbus->parent));
|
|
notifier_list_init(&req->cancel_notifiers);
|
|
|
|
if (reqops->init_req) {
|
|
reqops->init_req(req);
|
|
}
|
|
|
|
trace_scsi_req_alloc(req->dev->id, req->lun, req->tag);
|
|
return req;
|
|
}
|
|
|
|
SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
|
|
uint8_t *buf, size_t buf_len, void *hba_private)
|
|
{
|
|
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, d->qdev.parent_bus);
|
|
const SCSIReqOps *ops;
|
|
SCSIDeviceClass *sc = SCSI_DEVICE_GET_CLASS(d);
|
|
SCSIRequest *req;
|
|
SCSICommand cmd = { .len = 0 };
|
|
int ret;
|
|
|
|
if (buf_len == 0) {
|
|
trace_scsi_req_parse_bad(d->id, lun, tag, 0);
|
|
goto invalid_opcode;
|
|
}
|
|
|
|
if ((d->unit_attention.key == UNIT_ATTENTION ||
|
|
bus->unit_attention.key == UNIT_ATTENTION) &&
|
|
(buf[0] != INQUIRY &&
|
|
buf[0] != REPORT_LUNS &&
|
|
buf[0] != GET_CONFIGURATION &&
|
|
buf[0] != GET_EVENT_STATUS_NOTIFICATION &&
|
|
|
|
/*
|
|
* If we already have a pending unit attention condition,
|
|
* report this one before triggering another one.
|
|
*/
|
|
!(buf[0] == REQUEST_SENSE && d->sense_is_ua))) {
|
|
ops = &reqops_unit_attention;
|
|
} else if (lun != d->lun ||
|
|
buf[0] == REPORT_LUNS ||
|
|
(buf[0] == REQUEST_SENSE && d->sense_len)) {
|
|
ops = &reqops_target_command;
|
|
} else {
|
|
ops = NULL;
|
|
}
|
|
|
|
if (ops != NULL || !sc->parse_cdb) {
|
|
ret = scsi_req_parse_cdb(d, &cmd, buf, buf_len);
|
|
} else {
|
|
ret = sc->parse_cdb(d, &cmd, buf, buf_len, hba_private);
|
|
}
|
|
|
|
if (ret != 0) {
|
|
trace_scsi_req_parse_bad(d->id, lun, tag, buf[0]);
|
|
invalid_opcode:
|
|
req = scsi_req_alloc(&reqops_invalid_opcode, d, tag, lun, hba_private);
|
|
} else {
|
|
assert(cmd.len != 0);
|
|
trace_scsi_req_parsed(d->id, lun, tag, buf[0],
|
|
cmd.mode, cmd.xfer);
|
|
if (cmd.lba != -1) {
|
|
trace_scsi_req_parsed_lba(d->id, lun, tag, buf[0],
|
|
cmd.lba);
|
|
}
|
|
|
|
if (cmd.xfer > INT32_MAX) {
|
|
req = scsi_req_alloc(&reqops_invalid_field, d, tag, lun, hba_private);
|
|
} else if (ops) {
|
|
req = scsi_req_alloc(ops, d, tag, lun, hba_private);
|
|
} else {
|
|
req = scsi_device_alloc_req(d, tag, lun, buf, hba_private);
|
|
}
|
|
}
|
|
|
|
req->cmd = cmd;
|
|
req->residual = req->cmd.xfer;
|
|
|
|
switch (buf[0]) {
|
|
case INQUIRY:
|
|
trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]);
|
|
break;
|
|
case TEST_UNIT_READY:
|
|
trace_scsi_test_unit_ready(d->id, lun, tag);
|
|
break;
|
|
case REPORT_LUNS:
|
|
trace_scsi_report_luns(d->id, lun, tag);
|
|
break;
|
|
case REQUEST_SENSE:
|
|
trace_scsi_request_sense(d->id, lun, tag);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return req;
|
|
}
|
|
|
|
uint8_t *scsi_req_get_buf(SCSIRequest *req)
|
|
{
|
|
return req->ops->get_buf(req);
|
|
}
|
|
|
|
static void scsi_clear_reported_luns_changed(SCSIRequest *req)
|
|
{
|
|
SCSISense *ua;
|
|
|
|
if (req->dev->unit_attention.key == UNIT_ATTENTION) {
|
|
ua = &req->dev->unit_attention;
|
|
} else if (req->bus->unit_attention.key == UNIT_ATTENTION) {
|
|
ua = &req->bus->unit_attention;
|
|
} else {
|
|
return;
|
|
}
|
|
|
|
if (ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc &&
|
|
ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq) {
|
|
*ua = SENSE_CODE(NO_SENSE);
|
|
}
|
|
}
|
|
|
|
int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len)
|
|
{
|
|
int ret;
|
|
|
|
assert(len >= 14);
|
|
if (!req->sense_len) {
|
|
return 0;
|
|
}
|
|
|
|
ret = scsi_convert_sense(req->sense, req->sense_len, buf, len, true);
|
|
|
|
/*
|
|
* FIXME: clearing unit attention conditions upon autosense should be done
|
|
* only if the UA_INTLCK_CTRL field in the Control mode page is set to 00b
|
|
* (SAM-5, 5.14).
|
|
*
|
|
* We assume UA_INTLCK_CTRL to be 00b for HBAs that support autosense, and
|
|
* 10b for HBAs that do not support it (do not call scsi_req_get_sense).
|
|
* Here we handle unit attention clearing for UA_INTLCK_CTRL == 00b.
|
|
*/
|
|
if (req->dev->sense_is_ua) {
|
|
scsi_device_unit_attention_reported(req->dev);
|
|
req->dev->sense_len = 0;
|
|
req->dev->sense_is_ua = false;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int scsi_device_get_sense(SCSIDevice *dev, uint8_t *buf, int len, bool fixed)
|
|
{
|
|
return scsi_convert_sense(dev->sense, dev->sense_len, buf, len, fixed);
|
|
}
|
|
|
|
void scsi_req_build_sense(SCSIRequest *req, SCSISense sense)
|
|
{
|
|
trace_scsi_req_build_sense(req->dev->id, req->lun, req->tag,
|
|
sense.key, sense.asc, sense.ascq);
|
|
req->sense_len = scsi_build_sense(req->sense, sense);
|
|
}
|
|
|
|
static void scsi_req_enqueue_internal(SCSIRequest *req)
|
|
{
|
|
assert(!req->enqueued);
|
|
scsi_req_ref(req);
|
|
if (req->bus->info->get_sg_list) {
|
|
req->sg = req->bus->info->get_sg_list(req);
|
|
} else {
|
|
req->sg = NULL;
|
|
}
|
|
req->enqueued = true;
|
|
QTAILQ_INSERT_TAIL(&req->dev->requests, req, next);
|
|
}
|
|
|
|
int32_t scsi_req_enqueue(SCSIRequest *req)
|
|
{
|
|
int32_t rc;
|
|
|
|
assert(!req->retry);
|
|
scsi_req_enqueue_internal(req);
|
|
scsi_req_ref(req);
|
|
rc = req->ops->send_command(req, req->cmd.buf);
|
|
scsi_req_unref(req);
|
|
return rc;
|
|
}
|
|
|
|
static void scsi_req_dequeue(SCSIRequest *req)
|
|
{
|
|
trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag);
|
|
req->retry = false;
|
|
if (req->enqueued) {
|
|
QTAILQ_REMOVE(&req->dev->requests, req, next);
|
|
req->enqueued = false;
|
|
scsi_req_unref(req);
|
|
}
|
|
}
|
|
|
|
static int scsi_get_performance_length(int num_desc, int type, int data_type)
|
|
{
|
|
/* MMC-6, paragraph 6.7. */
|
|
switch (type) {
|
|
case 0:
|
|
if ((data_type & 3) == 0) {
|
|
/* Each descriptor is as in Table 295 - Nominal performance. */
|
|
return 16 * num_desc + 8;
|
|
} else {
|
|
/* Each descriptor is as in Table 296 - Exceptions. */
|
|
return 6 * num_desc + 8;
|
|
}
|
|
case 1:
|
|
case 4:
|
|
case 5:
|
|
return 8 * num_desc + 8;
|
|
case 2:
|
|
return 2048 * num_desc + 8;
|
|
case 3:
|
|
return 16 * num_desc + 8;
|
|
default:
|
|
return 8;
|
|
}
|
|
}
|
|
|
|
static int ata_passthrough_xfer_unit(SCSIDevice *dev, uint8_t *buf)
|
|
{
|
|
int byte_block = (buf[2] >> 2) & 0x1;
|
|
int type = (buf[2] >> 4) & 0x1;
|
|
int xfer_unit;
|
|
|
|
if (byte_block) {
|
|
if (type) {
|
|
xfer_unit = dev->blocksize;
|
|
} else {
|
|
xfer_unit = 512;
|
|
}
|
|
} else {
|
|
xfer_unit = 1;
|
|
}
|
|
|
|
return xfer_unit;
|
|
}
|
|
|
|
static int ata_passthrough_12_xfer(SCSIDevice *dev, uint8_t *buf)
|
|
{
|
|
int length = buf[2] & 0x3;
|
|
int xfer;
|
|
int unit = ata_passthrough_xfer_unit(dev, buf);
|
|
|
|
switch (length) {
|
|
case 0:
|
|
case 3: /* USB-specific. */
|
|
default:
|
|
xfer = 0;
|
|
break;
|
|
case 1:
|
|
xfer = buf[3];
|
|
break;
|
|
case 2:
|
|
xfer = buf[4];
|
|
break;
|
|
}
|
|
|
|
return xfer * unit;
|
|
}
|
|
|
|
static int ata_passthrough_16_xfer(SCSIDevice *dev, uint8_t *buf)
|
|
{
|
|
int extend = buf[1] & 0x1;
|
|
int length = buf[2] & 0x3;
|
|
int xfer;
|
|
int unit = ata_passthrough_xfer_unit(dev, buf);
|
|
|
|
switch (length) {
|
|
case 0:
|
|
case 3: /* USB-specific. */
|
|
default:
|
|
xfer = 0;
|
|
break;
|
|
case 1:
|
|
xfer = buf[4];
|
|
xfer |= (extend ? buf[3] << 8 : 0);
|
|
break;
|
|
case 2:
|
|
xfer = buf[6];
|
|
xfer |= (extend ? buf[5] << 8 : 0);
|
|
break;
|
|
}
|
|
|
|
return xfer * unit;
|
|
}
|
|
|
|
static int scsi_req_xfer(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
|
|
{
|
|
cmd->xfer = scsi_cdb_xfer(buf);
|
|
switch (buf[0]) {
|
|
case TEST_UNIT_READY:
|
|
case REWIND:
|
|
case START_STOP:
|
|
case SET_CAPACITY:
|
|
case WRITE_FILEMARKS:
|
|
case WRITE_FILEMARKS_16:
|
|
case SPACE:
|
|
case RESERVE:
|
|
case RELEASE:
|
|
case ERASE:
|
|
case ALLOW_MEDIUM_REMOVAL:
|
|
case SEEK_10:
|
|
case SYNCHRONIZE_CACHE:
|
|
case SYNCHRONIZE_CACHE_16:
|
|
case LOCATE_16:
|
|
case LOCK_UNLOCK_CACHE:
|
|
case SET_CD_SPEED:
|
|
case SET_LIMITS:
|
|
case WRITE_LONG_10:
|
|
case UPDATE_BLOCK:
|
|
case RESERVE_TRACK:
|
|
case SET_READ_AHEAD:
|
|
case PRE_FETCH:
|
|
case PRE_FETCH_16:
|
|
case ALLOW_OVERWRITE:
|
|
cmd->xfer = 0;
|
|
break;
|
|
case VERIFY_10:
|
|
case VERIFY_12:
|
|
case VERIFY_16:
|
|
if ((buf[1] & 2) == 0) {
|
|
cmd->xfer = 0;
|
|
} else if ((buf[1] & 4) != 0) {
|
|
cmd->xfer = 1;
|
|
}
|
|
cmd->xfer *= dev->blocksize;
|
|
break;
|
|
case MODE_SENSE:
|
|
break;
|
|
case WRITE_SAME_10:
|
|
case WRITE_SAME_16:
|
|
cmd->xfer = buf[1] & 1 ? 0 : dev->blocksize;
|
|
break;
|
|
case READ_CAPACITY_10:
|
|
cmd->xfer = 8;
|
|
break;
|
|
case READ_BLOCK_LIMITS:
|
|
cmd->xfer = 6;
|
|
break;
|
|
case SEND_VOLUME_TAG:
|
|
/* GPCMD_SET_STREAMING from multimedia commands. */
|
|
if (dev->type == TYPE_ROM) {
|
|
cmd->xfer = buf[10] | (buf[9] << 8);
|
|
} else {
|
|
cmd->xfer = buf[9] | (buf[8] << 8);
|
|
}
|
|
break;
|
|
case WRITE_6:
|
|
/* length 0 means 256 blocks */
|
|
if (cmd->xfer == 0) {
|
|
cmd->xfer = 256;
|
|
}
|
|
/* fall through */
|
|
case WRITE_10:
|
|
case WRITE_VERIFY_10:
|
|
case WRITE_12:
|
|
case WRITE_VERIFY_12:
|
|
case WRITE_16:
|
|
case WRITE_VERIFY_16:
|
|
cmd->xfer *= dev->blocksize;
|
|
break;
|
|
case READ_6:
|
|
case READ_REVERSE:
|
|
/* length 0 means 256 blocks */
|
|
if (cmd->xfer == 0) {
|
|
cmd->xfer = 256;
|
|
}
|
|
/* fall through */
|
|
case READ_10:
|
|
case READ_12:
|
|
case READ_16:
|
|
cmd->xfer *= dev->blocksize;
|
|
break;
|
|
case FORMAT_UNIT:
|
|
/* MMC mandates the parameter list to be 12-bytes long. Parameters
|
|
* for block devices are restricted to the header right now. */
|
|
if (dev->type == TYPE_ROM && (buf[1] & 16)) {
|
|
cmd->xfer = 12;
|
|
} else {
|
|
cmd->xfer = (buf[1] & 16) == 0 ? 0 : (buf[1] & 32 ? 8 : 4);
|
|
}
|
|
break;
|
|
case INQUIRY:
|
|
case RECEIVE_DIAGNOSTIC:
|
|
case SEND_DIAGNOSTIC:
|
|
cmd->xfer = buf[4] | (buf[3] << 8);
|
|
break;
|
|
case READ_CD:
|
|
case READ_BUFFER:
|
|
case WRITE_BUFFER:
|
|
case SEND_CUE_SHEET:
|
|
cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16);
|
|
break;
|
|
case PERSISTENT_RESERVE_OUT:
|
|
cmd->xfer = ldl_be_p(&buf[5]) & 0xffffffffULL;
|
|
break;
|
|
case ERASE_12:
|
|
if (dev->type == TYPE_ROM) {
|
|
/* MMC command GET PERFORMANCE. */
|
|
cmd->xfer = scsi_get_performance_length(buf[9] | (buf[8] << 8),
|
|
buf[10], buf[1] & 0x1f);
|
|
}
|
|
break;
|
|
case MECHANISM_STATUS:
|
|
case READ_DVD_STRUCTURE:
|
|
case SEND_DVD_STRUCTURE:
|
|
case MAINTENANCE_OUT:
|
|
case MAINTENANCE_IN:
|
|
if (dev->type == TYPE_ROM) {
|
|
/* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */
|
|
cmd->xfer = buf[9] | (buf[8] << 8);
|
|
}
|
|
break;
|
|
case ATA_PASSTHROUGH_12:
|
|
if (dev->type == TYPE_ROM) {
|
|
/* BLANK command of MMC */
|
|
cmd->xfer = 0;
|
|
} else {
|
|
cmd->xfer = ata_passthrough_12_xfer(dev, buf);
|
|
}
|
|
break;
|
|
case ATA_PASSTHROUGH_16:
|
|
cmd->xfer = ata_passthrough_16_xfer(dev, buf);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int scsi_req_stream_xfer(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
|
|
{
|
|
switch (buf[0]) {
|
|
/* stream commands */
|
|
case ERASE_12:
|
|
case ERASE_16:
|
|
cmd->xfer = 0;
|
|
break;
|
|
case READ_6:
|
|
case READ_REVERSE:
|
|
case RECOVER_BUFFERED_DATA:
|
|
case WRITE_6:
|
|
cmd->xfer = buf[4] | (buf[3] << 8) | (buf[2] << 16);
|
|
if (buf[1] & 0x01) { /* fixed */
|
|
cmd->xfer *= dev->blocksize;
|
|
}
|
|
break;
|
|
case READ_16:
|
|
case READ_REVERSE_16:
|
|
case VERIFY_16:
|
|
case WRITE_16:
|
|
cmd->xfer = buf[14] | (buf[13] << 8) | (buf[12] << 16);
|
|
if (buf[1] & 0x01) { /* fixed */
|
|
cmd->xfer *= dev->blocksize;
|
|
}
|
|
break;
|
|
case REWIND:
|
|
case LOAD_UNLOAD:
|
|
cmd->xfer = 0;
|
|
break;
|
|
case SPACE_16:
|
|
cmd->xfer = buf[13] | (buf[12] << 8);
|
|
break;
|
|
case READ_POSITION:
|
|
switch (buf[1] & 0x1f) /* operation code */ {
|
|
case SHORT_FORM_BLOCK_ID:
|
|
case SHORT_FORM_VENDOR_SPECIFIC:
|
|
cmd->xfer = 20;
|
|
break;
|
|
case LONG_FORM:
|
|
cmd->xfer = 32;
|
|
break;
|
|
case EXTENDED_FORM:
|
|
cmd->xfer = buf[8] | (buf[7] << 8);
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
break;
|
|
case FORMAT_UNIT:
|
|
cmd->xfer = buf[4] | (buf[3] << 8);
|
|
break;
|
|
/* generic commands */
|
|
default:
|
|
return scsi_req_xfer(cmd, dev, buf);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int scsi_req_medium_changer_xfer(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
|
|
{
|
|
switch (buf[0]) {
|
|
/* medium changer commands */
|
|
case EXCHANGE_MEDIUM:
|
|
case INITIALIZE_ELEMENT_STATUS:
|
|
case INITIALIZE_ELEMENT_STATUS_WITH_RANGE:
|
|
case MOVE_MEDIUM:
|
|
case POSITION_TO_ELEMENT:
|
|
cmd->xfer = 0;
|
|
break;
|
|
case READ_ELEMENT_STATUS:
|
|
cmd->xfer = buf[9] | (buf[8] << 8) | (buf[7] << 16);
|
|
break;
|
|
|
|
/* generic commands */
|
|
default:
|
|
return scsi_req_xfer(cmd, dev, buf);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int scsi_req_scanner_length(SCSICommand *cmd, SCSIDevice *dev, uint8_t *buf)
|
|
{
|
|
switch (buf[0]) {
|
|
/* Scanner commands */
|
|
case OBJECT_POSITION:
|
|
cmd->xfer = 0;
|
|
break;
|
|
case SCAN:
|
|
cmd->xfer = buf[4];
|
|
break;
|
|
case READ_10:
|
|
case SEND:
|
|
case GET_WINDOW:
|
|
case SET_WINDOW:
|
|
cmd->xfer = buf[8] | (buf[7] << 8) | (buf[6] << 16);
|
|
break;
|
|
default:
|
|
/* GET_DATA_BUFFER_STATUS xfer handled by scsi_req_xfer */
|
|
return scsi_req_xfer(cmd, dev, buf);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void scsi_cmd_xfer_mode(SCSICommand *cmd)
|
|
{
|
|
if (!cmd->xfer) {
|
|
cmd->mode = SCSI_XFER_NONE;
|
|
return;
|
|
}
|
|
switch (cmd->buf[0]) {
|
|
case WRITE_6:
|
|
case WRITE_10:
|
|
case WRITE_VERIFY_10:
|
|
case WRITE_12:
|
|
case WRITE_VERIFY_12:
|
|
case WRITE_16:
|
|
case WRITE_VERIFY_16:
|
|
case VERIFY_10:
|
|
case VERIFY_12:
|
|
case VERIFY_16:
|
|
case COPY:
|
|
case COPY_VERIFY:
|
|
case COMPARE:
|
|
case CHANGE_DEFINITION:
|
|
case LOG_SELECT:
|
|
case MODE_SELECT:
|
|
case MODE_SELECT_10:
|
|
case SEND_DIAGNOSTIC:
|
|
case WRITE_BUFFER:
|
|
case FORMAT_UNIT:
|
|
case REASSIGN_BLOCKS:
|
|
case SEARCH_EQUAL:
|
|
case SEARCH_HIGH:
|
|
case SEARCH_LOW:
|
|
case UPDATE_BLOCK:
|
|
case WRITE_LONG_10:
|
|
case WRITE_SAME_10:
|
|
case WRITE_SAME_16:
|
|
case UNMAP:
|
|
case SEARCH_HIGH_12:
|
|
case SEARCH_EQUAL_12:
|
|
case SEARCH_LOW_12:
|
|
case MEDIUM_SCAN:
|
|
case SEND_VOLUME_TAG:
|
|
case SEND_CUE_SHEET:
|
|
case SEND_DVD_STRUCTURE:
|
|
case PERSISTENT_RESERVE_OUT:
|
|
case MAINTENANCE_OUT:
|
|
case SET_WINDOW:
|
|
case SCAN:
|
|
/* SCAN conflicts with START_STOP. START_STOP has cmd->xfer set to 0 for
|
|
* non-scanner devices, so we only get here for SCAN and not for START_STOP.
|
|
*/
|
|
cmd->mode = SCSI_XFER_TO_DEV;
|
|
break;
|
|
case ATA_PASSTHROUGH_12:
|
|
case ATA_PASSTHROUGH_16:
|
|
/* T_DIR */
|
|
cmd->mode = (cmd->buf[2] & 0x8) ?
|
|
SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV;
|
|
break;
|
|
default:
|
|
cmd->mode = SCSI_XFER_FROM_DEV;
|
|
break;
|
|
}
|
|
}
|
|
|
|
int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf,
|
|
size_t buf_len)
|
|
{
|
|
int rc;
|
|
int len;
|
|
|
|
cmd->lba = -1;
|
|
len = scsi_cdb_length(buf);
|
|
if (len < 0 || len > buf_len) {
|
|
return -1;
|
|
}
|
|
|
|
cmd->len = len;
|
|
switch (dev->type) {
|
|
case TYPE_TAPE:
|
|
rc = scsi_req_stream_xfer(cmd, dev, buf);
|
|
break;
|
|
case TYPE_MEDIUM_CHANGER:
|
|
rc = scsi_req_medium_changer_xfer(cmd, dev, buf);
|
|
break;
|
|
case TYPE_SCANNER:
|
|
rc = scsi_req_scanner_length(cmd, dev, buf);
|
|
break;
|
|
default:
|
|
rc = scsi_req_xfer(cmd, dev, buf);
|
|
break;
|
|
}
|
|
|
|
if (rc != 0)
|
|
return rc;
|
|
|
|
memcpy(cmd->buf, buf, cmd->len);
|
|
scsi_cmd_xfer_mode(cmd);
|
|
cmd->lba = scsi_cmd_lba(cmd);
|
|
return 0;
|
|
}
|
|
|
|
void scsi_device_report_change(SCSIDevice *dev, SCSISense sense)
|
|
{
|
|
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus);
|
|
|
|
scsi_device_set_ua(dev, sense);
|
|
if (bus->info->change) {
|
|
bus->info->change(bus, dev, sense);
|
|
}
|
|
}
|
|
|
|
SCSIRequest *scsi_req_ref(SCSIRequest *req)
|
|
{
|
|
assert(req->refcount > 0);
|
|
req->refcount++;
|
|
return req;
|
|
}
|
|
|
|
void scsi_req_unref(SCSIRequest *req)
|
|
{
|
|
assert(req->refcount > 0);
|
|
if (--req->refcount == 0) {
|
|
BusState *qbus = req->dev->qdev.parent_bus;
|
|
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, qbus);
|
|
|
|
if (bus->info->free_request && req->hba_private) {
|
|
bus->info->free_request(bus, req->hba_private);
|
|
}
|
|
if (req->ops->free_req) {
|
|
req->ops->free_req(req);
|
|
}
|
|
object_unref(OBJECT(req->dev));
|
|
object_unref(OBJECT(qbus->parent));
|
|
g_free(req);
|
|
}
|
|
}
|
|
|
|
/* Tell the device that we finished processing this chunk of I/O. It
|
|
will start the next chunk or complete the command. */
|
|
void scsi_req_continue(SCSIRequest *req)
|
|
{
|
|
if (req->io_canceled) {
|
|
trace_scsi_req_continue_canceled(req->dev->id, req->lun, req->tag);
|
|
return;
|
|
}
|
|
trace_scsi_req_continue(req->dev->id, req->lun, req->tag);
|
|
if (req->cmd.mode == SCSI_XFER_TO_DEV) {
|
|
req->ops->write_data(req);
|
|
} else {
|
|
req->ops->read_data(req);
|
|
}
|
|
}
|
|
|
|
/* Called by the devices when data is ready for the HBA. The HBA should
|
|
start a DMA operation to read or fill the device's data buffer.
|
|
Once it completes, calling scsi_req_continue will restart I/O. */
|
|
void scsi_req_data(SCSIRequest *req, int len)
|
|
{
|
|
uint8_t *buf;
|
|
if (req->io_canceled) {
|
|
trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len);
|
|
return;
|
|
}
|
|
trace_scsi_req_data(req->dev->id, req->lun, req->tag, len);
|
|
assert(req->cmd.mode != SCSI_XFER_NONE);
|
|
if (!req->sg) {
|
|
req->residual -= len;
|
|
req->bus->info->transfer_data(req, len);
|
|
return;
|
|
}
|
|
|
|
/* If the device calls scsi_req_data and the HBA specified a
|
|
* scatter/gather list, the transfer has to happen in a single
|
|
* step. */
|
|
assert(!req->dma_started);
|
|
req->dma_started = true;
|
|
|
|
buf = scsi_req_get_buf(req);
|
|
if (req->cmd.mode == SCSI_XFER_FROM_DEV) {
|
|
dma_buf_read(buf, len, &req->residual, req->sg,
|
|
MEMTXATTRS_UNSPECIFIED);
|
|
} else {
|
|
dma_buf_write(buf, len, &req->residual, req->sg,
|
|
MEMTXATTRS_UNSPECIFIED);
|
|
}
|
|
scsi_req_continue(req);
|
|
}
|
|
|
|
void scsi_req_print(SCSIRequest *req)
|
|
{
|
|
FILE *fp = stderr;
|
|
int i;
|
|
|
|
fprintf(fp, "[%s id=%d] %s",
|
|
req->dev->qdev.parent_bus->name,
|
|
req->dev->id,
|
|
scsi_command_name(req->cmd.buf[0]));
|
|
for (i = 1; i < req->cmd.len; i++) {
|
|
fprintf(fp, " 0x%02x", req->cmd.buf[i]);
|
|
}
|
|
switch (req->cmd.mode) {
|
|
case SCSI_XFER_NONE:
|
|
fprintf(fp, " - none\n");
|
|
break;
|
|
case SCSI_XFER_FROM_DEV:
|
|
fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer);
|
|
break;
|
|
case SCSI_XFER_TO_DEV:
|
|
fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer);
|
|
break;
|
|
default:
|
|
fprintf(fp, " - Oops\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
void scsi_req_complete_failed(SCSIRequest *req, int host_status)
|
|
{
|
|
SCSISense sense;
|
|
int status;
|
|
|
|
assert(req->status == -1 && req->host_status == -1);
|
|
assert(req->ops != &reqops_unit_attention);
|
|
|
|
if (!req->bus->info->fail) {
|
|
status = scsi_sense_from_host_status(req->host_status, &sense);
|
|
if (status == CHECK_CONDITION) {
|
|
scsi_req_build_sense(req, sense);
|
|
}
|
|
scsi_req_complete(req, status);
|
|
return;
|
|
}
|
|
|
|
req->host_status = host_status;
|
|
scsi_req_ref(req);
|
|
scsi_req_dequeue(req);
|
|
req->bus->info->fail(req);
|
|
|
|
/* Cancelled requests might end up being completed instead of cancelled */
|
|
notifier_list_notify(&req->cancel_notifiers, req);
|
|
scsi_req_unref(req);
|
|
}
|
|
|
|
void scsi_req_complete(SCSIRequest *req, int status)
|
|
{
|
|
assert(req->status == -1 && req->host_status == -1);
|
|
req->status = status;
|
|
req->host_status = SCSI_HOST_OK;
|
|
|
|
assert(req->sense_len <= sizeof(req->sense));
|
|
if (status == GOOD) {
|
|
req->sense_len = 0;
|
|
}
|
|
|
|
if (req->sense_len) {
|
|
memcpy(req->dev->sense, req->sense, req->sense_len);
|
|
req->dev->sense_len = req->sense_len;
|
|
req->dev->sense_is_ua = (req->ops == &reqops_unit_attention);
|
|
} else {
|
|
req->dev->sense_len = 0;
|
|
req->dev->sense_is_ua = false;
|
|
}
|
|
|
|
scsi_req_ref(req);
|
|
scsi_req_dequeue(req);
|
|
req->bus->info->complete(req, req->residual);
|
|
|
|
/* Cancelled requests might end up being completed instead of cancelled */
|
|
notifier_list_notify(&req->cancel_notifiers, req);
|
|
scsi_req_unref(req);
|
|
}
|
|
|
|
/* Called by the devices when the request is canceled. */
|
|
void scsi_req_cancel_complete(SCSIRequest *req)
|
|
{
|
|
assert(req->io_canceled);
|
|
if (req->bus->info->cancel) {
|
|
req->bus->info->cancel(req);
|
|
}
|
|
notifier_list_notify(&req->cancel_notifiers, req);
|
|
scsi_req_unref(req);
|
|
}
|
|
|
|
/* Cancel @req asynchronously. @notifier is added to @req's cancellation
|
|
* notifier list, the bus will be notified the requests cancellation is
|
|
* completed.
|
|
* */
|
|
void scsi_req_cancel_async(SCSIRequest *req, Notifier *notifier)
|
|
{
|
|
trace_scsi_req_cancel(req->dev->id, req->lun, req->tag);
|
|
if (notifier) {
|
|
notifier_list_add(&req->cancel_notifiers, notifier);
|
|
}
|
|
if (req->io_canceled) {
|
|
/* A blk_aio_cancel_async is pending; when it finishes,
|
|
* scsi_req_cancel_complete will be called and will
|
|
* call the notifier we just added. Just wait for that.
|
|
*/
|
|
assert(req->aiocb);
|
|
return;
|
|
}
|
|
/* Dropped in scsi_req_cancel_complete. */
|
|
scsi_req_ref(req);
|
|
scsi_req_dequeue(req);
|
|
req->io_canceled = true;
|
|
if (req->aiocb) {
|
|
blk_aio_cancel_async(req->aiocb);
|
|
} else {
|
|
scsi_req_cancel_complete(req);
|
|
}
|
|
}
|
|
|
|
void scsi_req_cancel(SCSIRequest *req)
|
|
{
|
|
trace_scsi_req_cancel(req->dev->id, req->lun, req->tag);
|
|
if (!req->enqueued) {
|
|
return;
|
|
}
|
|
assert(!req->io_canceled);
|
|
/* Dropped in scsi_req_cancel_complete. */
|
|
scsi_req_ref(req);
|
|
scsi_req_dequeue(req);
|
|
req->io_canceled = true;
|
|
if (req->aiocb) {
|
|
blk_aio_cancel(req->aiocb);
|
|
} else {
|
|
scsi_req_cancel_complete(req);
|
|
}
|
|
}
|
|
|
|
static int scsi_ua_precedence(SCSISense sense)
|
|
{
|
|
if (sense.key != UNIT_ATTENTION) {
|
|
return INT_MAX;
|
|
}
|
|
if (sense.asc == 0x29 && sense.ascq == 0x04) {
|
|
/* DEVICE INTERNAL RESET goes with POWER ON OCCURRED */
|
|
return 1;
|
|
} else if (sense.asc == 0x3F && sense.ascq == 0x01) {
|
|
/* MICROCODE HAS BEEN CHANGED goes with SCSI BUS RESET OCCURRED */
|
|
return 2;
|
|
} else if (sense.asc == 0x29 && (sense.ascq == 0x05 || sense.ascq == 0x06)) {
|
|
/* These two go with "all others". */
|
|
;
|
|
} else if (sense.asc == 0x29 && sense.ascq <= 0x07) {
|
|
/* POWER ON, RESET OR BUS DEVICE RESET OCCURRED = 0
|
|
* POWER ON OCCURRED = 1
|
|
* SCSI BUS RESET OCCURRED = 2
|
|
* BUS DEVICE RESET FUNCTION OCCURRED = 3
|
|
* I_T NEXUS LOSS OCCURRED = 7
|
|
*/
|
|
return sense.ascq;
|
|
} else if (sense.asc == 0x2F && sense.ascq == 0x01) {
|
|
/* COMMANDS CLEARED BY POWER LOSS NOTIFICATION */
|
|
return 8;
|
|
}
|
|
return (sense.asc << 8) | sense.ascq;
|
|
}
|
|
|
|
void scsi_bus_set_ua(SCSIBus *bus, SCSISense sense)
|
|
{
|
|
int prec1, prec2;
|
|
if (sense.key != UNIT_ATTENTION) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Override a pre-existing unit attention condition, except for a more
|
|
* important reset condition.
|
|
*/
|
|
prec1 = scsi_ua_precedence(bus->unit_attention);
|
|
prec2 = scsi_ua_precedence(sense);
|
|
if (prec2 < prec1) {
|
|
bus->unit_attention = sense;
|
|
}
|
|
}
|
|
|
|
void scsi_device_set_ua(SCSIDevice *sdev, SCSISense sense)
|
|
{
|
|
int prec1, prec2;
|
|
if (sense.key != UNIT_ATTENTION) {
|
|
return;
|
|
}
|
|
trace_scsi_device_set_ua(sdev->id, sdev->lun, sense.key,
|
|
sense.asc, sense.ascq);
|
|
|
|
/*
|
|
* Override a pre-existing unit attention condition, except for a more
|
|
* important reset condition.
|
|
*/
|
|
prec1 = scsi_ua_precedence(sdev->unit_attention);
|
|
prec2 = scsi_ua_precedence(sense);
|
|
if (prec2 < prec1) {
|
|
sdev->unit_attention = sense;
|
|
}
|
|
}
|
|
|
|
static void scsi_device_purge_one_req(SCSIRequest *req, void *opaque)
|
|
{
|
|
scsi_req_cancel_async(req, NULL);
|
|
}
|
|
|
|
/**
|
|
* Cancel all requests, and block until they are deleted.
|
|
*/
|
|
void scsi_device_purge_requests(SCSIDevice *sdev, SCSISense sense)
|
|
{
|
|
scsi_device_for_each_req_async(sdev, scsi_device_purge_one_req, NULL);
|
|
|
|
/*
|
|
* Await all the scsi_device_purge_one_req() calls scheduled by
|
|
* scsi_device_for_each_req_async(), and all I/O requests that were
|
|
* cancelled this way, but may still take a bit of time to settle.
|
|
*/
|
|
blk_drain(sdev->conf.blk);
|
|
|
|
scsi_device_set_ua(sdev, sense);
|
|
}
|
|
|
|
void scsi_device_drained_begin(SCSIDevice *sdev)
|
|
{
|
|
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, sdev->qdev.parent_bus);
|
|
if (!bus) {
|
|
return;
|
|
}
|
|
|
|
assert(qemu_get_current_aio_context() == qemu_get_aio_context());
|
|
assert(bus->drain_count < INT_MAX);
|
|
|
|
/*
|
|
* Multiple BlockBackends can be on a SCSIBus and each may begin/end
|
|
* draining at any time. Keep a counter so HBAs only see begin/end once.
|
|
*/
|
|
if (bus->drain_count++ == 0) {
|
|
trace_scsi_bus_drained_begin(bus, sdev);
|
|
if (bus->info->drained_begin) {
|
|
bus->info->drained_begin(bus);
|
|
}
|
|
}
|
|
}
|
|
|
|
void scsi_device_drained_end(SCSIDevice *sdev)
|
|
{
|
|
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, sdev->qdev.parent_bus);
|
|
if (!bus) {
|
|
return;
|
|
}
|
|
|
|
assert(qemu_get_current_aio_context() == qemu_get_aio_context());
|
|
assert(bus->drain_count > 0);
|
|
|
|
if (bus->drain_count-- == 1) {
|
|
trace_scsi_bus_drained_end(bus, sdev);
|
|
if (bus->info->drained_end) {
|
|
bus->info->drained_end(bus);
|
|
}
|
|
}
|
|
}
|
|
|
|
static char *scsibus_get_dev_path(DeviceState *dev)
|
|
{
|
|
SCSIDevice *d = SCSI_DEVICE(dev);
|
|
DeviceState *hba = dev->parent_bus->parent;
|
|
char *id;
|
|
char *path;
|
|
|
|
id = qdev_get_dev_path(hba);
|
|
if (id) {
|
|
path = g_strdup_printf("%s/%d:%d:%d", id, d->channel, d->id, d->lun);
|
|
} else {
|
|
path = g_strdup_printf("%d:%d:%d", d->channel, d->id, d->lun);
|
|
}
|
|
g_free(id);
|
|
return path;
|
|
}
|
|
|
|
static char *scsibus_get_fw_dev_path(DeviceState *dev)
|
|
{
|
|
SCSIDevice *d = SCSI_DEVICE(dev);
|
|
return g_strdup_printf("channel@%x/%s@%x,%x", d->channel,
|
|
qdev_fw_name(dev), d->id, d->lun);
|
|
}
|
|
|
|
/* SCSI request list. For simplicity, pv points to the whole device */
|
|
|
|
static void put_scsi_req(SCSIRequest *req, void *opaque)
|
|
{
|
|
QEMUFile *f = opaque;
|
|
|
|
assert(!req->io_canceled);
|
|
assert(req->status == -1 && req->host_status == -1);
|
|
assert(req->enqueued);
|
|
|
|
qemu_put_sbyte(f, req->retry ? 1 : 2);
|
|
qemu_put_buffer(f, req->cmd.buf, sizeof(req->cmd.buf));
|
|
qemu_put_be32s(f, &req->tag);
|
|
qemu_put_be32s(f, &req->lun);
|
|
if (req->bus->info->save_request) {
|
|
req->bus->info->save_request(f, req);
|
|
}
|
|
if (req->ops->save_request) {
|
|
req->ops->save_request(f, req);
|
|
}
|
|
}
|
|
|
|
static int put_scsi_requests(QEMUFile *f, void *pv, size_t size,
|
|
const VMStateField *field, JSONWriter *vmdesc)
|
|
{
|
|
SCSIDevice *s = pv;
|
|
|
|
scsi_device_for_each_req_sync(s, put_scsi_req, f);
|
|
qemu_put_sbyte(f, 0);
|
|
return 0;
|
|
}
|
|
|
|
static int get_scsi_requests(QEMUFile *f, void *pv, size_t size,
|
|
const VMStateField *field)
|
|
{
|
|
SCSIDevice *s = pv;
|
|
SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, s->qdev.parent_bus);
|
|
int8_t sbyte;
|
|
|
|
while ((sbyte = qemu_get_sbyte(f)) > 0) {
|
|
uint8_t buf[SCSI_CMD_BUF_SIZE];
|
|
uint32_t tag;
|
|
uint32_t lun;
|
|
SCSIRequest *req;
|
|
|
|
qemu_get_buffer(f, buf, sizeof(buf));
|
|
qemu_get_be32s(f, &tag);
|
|
qemu_get_be32s(f, &lun);
|
|
/*
|
|
* A too-short CDB would have been rejected by scsi_req_new, so just use
|
|
* SCSI_CMD_BUF_SIZE as the CDB length.
|
|
*/
|
|
req = scsi_req_new(s, tag, lun, buf, sizeof(buf), NULL);
|
|
req->retry = (sbyte == 1);
|
|
if (bus->info->load_request) {
|
|
req->hba_private = bus->info->load_request(f, req);
|
|
}
|
|
if (req->ops->load_request) {
|
|
req->ops->load_request(f, req);
|
|
}
|
|
|
|
/* Just restart it later. */
|
|
scsi_req_enqueue_internal(req);
|
|
|
|
/* At this point, the request will be kept alive by the reference
|
|
* added by scsi_req_enqueue_internal, so we can release our reference.
|
|
* The HBA of course will add its own reference in the load_request
|
|
* callback if it needs to hold on the SCSIRequest.
|
|
*/
|
|
scsi_req_unref(req);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const VMStateInfo vmstate_info_scsi_requests = {
|
|
.name = "scsi-requests",
|
|
.get = get_scsi_requests,
|
|
.put = put_scsi_requests,
|
|
};
|
|
|
|
static bool scsi_sense_state_needed(void *opaque)
|
|
{
|
|
SCSIDevice *s = opaque;
|
|
|
|
return s->sense_len > SCSI_SENSE_BUF_SIZE_OLD;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_scsi_sense_state = {
|
|
.name = "SCSIDevice/sense",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.needed = scsi_sense_state_needed,
|
|
.fields = (const VMStateField[]) {
|
|
VMSTATE_UINT8_SUB_ARRAY(sense, SCSIDevice,
|
|
SCSI_SENSE_BUF_SIZE_OLD,
|
|
SCSI_SENSE_BUF_SIZE - SCSI_SENSE_BUF_SIZE_OLD),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
const VMStateDescription vmstate_scsi_device = {
|
|
.name = "SCSIDevice",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (const VMStateField[]) {
|
|
VMSTATE_UINT8(unit_attention.key, SCSIDevice),
|
|
VMSTATE_UINT8(unit_attention.asc, SCSIDevice),
|
|
VMSTATE_UINT8(unit_attention.ascq, SCSIDevice),
|
|
VMSTATE_BOOL(sense_is_ua, SCSIDevice),
|
|
VMSTATE_UINT8_SUB_ARRAY(sense, SCSIDevice, 0, SCSI_SENSE_BUF_SIZE_OLD),
|
|
VMSTATE_UINT32(sense_len, SCSIDevice),
|
|
{
|
|
.name = "requests",
|
|
.version_id = 0,
|
|
.field_exists = NULL,
|
|
.size = 0, /* ouch */
|
|
.info = &vmstate_info_scsi_requests,
|
|
.flags = VMS_SINGLE,
|
|
.offset = 0,
|
|
},
|
|
VMSTATE_END_OF_LIST()
|
|
},
|
|
.subsections = (const VMStateDescription * const []) {
|
|
&vmstate_scsi_sense_state,
|
|
NULL
|
|
}
|
|
};
|
|
|
|
static Property scsi_props[] = {
|
|
DEFINE_PROP_UINT32("channel", SCSIDevice, channel, 0),
|
|
DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1),
|
|
DEFINE_PROP_UINT32("lun", SCSIDevice, lun, -1),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void scsi_device_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *k = DEVICE_CLASS(klass);
|
|
set_bit(DEVICE_CATEGORY_STORAGE, k->categories);
|
|
k->bus_type = TYPE_SCSI_BUS;
|
|
k->realize = scsi_qdev_realize;
|
|
k->unrealize = scsi_qdev_unrealize;
|
|
device_class_set_props(k, scsi_props);
|
|
}
|
|
|
|
static void scsi_dev_instance_init(Object *obj)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
SCSIDevice *s = SCSI_DEVICE(dev);
|
|
|
|
device_add_bootindex_property(obj, &s->conf.bootindex,
|
|
"bootindex", NULL,
|
|
&s->qdev);
|
|
}
|
|
|
|
static const TypeInfo scsi_device_type_info = {
|
|
.name = TYPE_SCSI_DEVICE,
|
|
.parent = TYPE_DEVICE,
|
|
.instance_size = sizeof(SCSIDevice),
|
|
.abstract = true,
|
|
.class_size = sizeof(SCSIDeviceClass),
|
|
.class_init = scsi_device_class_init,
|
|
.instance_init = scsi_dev_instance_init,
|
|
};
|
|
|
|
static void scsi_bus_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
BusClass *k = BUS_CLASS(klass);
|
|
HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
|
|
|
|
k->get_dev_path = scsibus_get_dev_path;
|
|
k->get_fw_dev_path = scsibus_get_fw_dev_path;
|
|
k->check_address = scsi_bus_check_address;
|
|
hc->unplug = qdev_simple_device_unplug_cb;
|
|
}
|
|
|
|
static const TypeInfo scsi_bus_info = {
|
|
.name = TYPE_SCSI_BUS,
|
|
.parent = TYPE_BUS,
|
|
.instance_size = sizeof(SCSIBus),
|
|
.class_init = scsi_bus_class_init,
|
|
.interfaces = (InterfaceInfo[]) {
|
|
{ TYPE_HOTPLUG_HANDLER },
|
|
{ }
|
|
}
|
|
};
|
|
|
|
static void scsi_register_types(void)
|
|
{
|
|
type_register_static(&scsi_bus_info);
|
|
type_register_static(&scsi_device_type_info);
|
|
}
|
|
|
|
type_init(scsi_register_types)
|