root / hw / scsi-bus.c @ 74382217
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#include "hw.h" |
---|---|
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#include "qemu-error.h" |
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#include "scsi.h" |
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#include "scsi-defs.h" |
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#include "qdev.h" |
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#include "blockdev.h" |
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#include "trace.h" |
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|
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static char *scsibus_get_fw_dev_path(DeviceState *dev); |
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|
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static struct BusInfo scsi_bus_info = { |
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.name = "SCSI",
|
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.size = sizeof(SCSIBus),
|
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.get_fw_dev_path = scsibus_get_fw_dev_path, |
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.props = (Property[]) { |
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DEFINE_PROP_UINT32("scsi-id", SCSIDevice, id, -1), |
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DEFINE_PROP_END_OF_LIST(), |
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}, |
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}; |
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static int next_scsi_bus; |
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|
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/* Create a scsi bus, and attach devices to it. */
|
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void scsi_bus_new(SCSIBus *bus, DeviceState *host, int tcq, int ndev, |
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const SCSIBusOps *ops)
|
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{ |
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qbus_create_inplace(&bus->qbus, &scsi_bus_info, host, NULL);
|
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bus->busnr = next_scsi_bus++; |
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bus->tcq = tcq; |
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bus->ndev = ndev; |
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bus->ops = ops; |
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bus->qbus.allow_hotplug = 1;
|
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} |
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|
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static int scsi_qdev_init(DeviceState *qdev, DeviceInfo *base) |
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{ |
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SCSIDevice *dev = DO_UPCAST(SCSIDevice, qdev, qdev); |
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SCSIDeviceInfo *info = DO_UPCAST(SCSIDeviceInfo, qdev, base); |
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SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); |
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int rc = -1; |
40 |
|
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if (dev->id == -1) { |
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for (dev->id = 0; dev->id < bus->ndev; dev->id++) { |
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if (bus->devs[dev->id] == NULL) |
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break;
|
45 |
} |
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} |
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if (dev->id >= bus->ndev) {
|
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error_report("bad scsi device id: %d", dev->id);
|
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goto err;
|
50 |
} |
51 |
|
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if (bus->devs[dev->id]) {
|
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qdev_free(&bus->devs[dev->id]->qdev); |
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} |
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bus->devs[dev->id] = dev; |
56 |
|
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dev->info = info; |
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QTAILQ_INIT(&dev->requests); |
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rc = dev->info->init(dev); |
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if (rc != 0) { |
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bus->devs[dev->id] = NULL;
|
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} |
63 |
|
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err:
|
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return rc;
|
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} |
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|
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static int scsi_qdev_exit(DeviceState *qdev) |
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{ |
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SCSIDevice *dev = DO_UPCAST(SCSIDevice, qdev, qdev); |
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SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, dev->qdev.parent_bus); |
72 |
|
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assert(bus->devs[dev->id] != NULL);
|
74 |
if (bus->devs[dev->id]->info->destroy) {
|
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bus->devs[dev->id]->info->destroy(bus->devs[dev->id]); |
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} |
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bus->devs[dev->id] = NULL;
|
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return 0; |
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} |
80 |
|
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void scsi_qdev_register(SCSIDeviceInfo *info)
|
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{ |
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info->qdev.bus_info = &scsi_bus_info; |
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info->qdev.init = scsi_qdev_init; |
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info->qdev.unplug = qdev_simple_unplug_cb; |
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info->qdev.exit = scsi_qdev_exit; |
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qdev_register(&info->qdev); |
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} |
89 |
|
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/* handle legacy '-drive if=scsi,...' cmd line args */
|
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SCSIDevice *scsi_bus_legacy_add_drive(SCSIBus *bus, BlockDriverState *bdrv, |
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int unit, bool removable) |
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{ |
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const char *driver; |
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DeviceState *dev; |
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|
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driver = bdrv_is_sg(bdrv) ? "scsi-generic" : "scsi-disk"; |
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dev = qdev_create(&bus->qbus, driver); |
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qdev_prop_set_uint32(dev, "scsi-id", unit);
|
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if (qdev_prop_exists(dev, "removable")) { |
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qdev_prop_set_bit(dev, "removable", removable);
|
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} |
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if (qdev_prop_set_drive(dev, "drive", bdrv) < 0) { |
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qdev_free(dev); |
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return NULL; |
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} |
107 |
if (qdev_init(dev) < 0) |
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return NULL; |
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return DO_UPCAST(SCSIDevice, qdev, dev);
|
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} |
111 |
|
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int 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 res = 0, unit; |
117 |
|
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loc_push_none(&loc); |
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for (unit = 0; unit < bus->ndev; unit++) { |
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dinfo = drive_get(IF_SCSI, bus->busnr, unit); |
121 |
if (dinfo == NULL) { |
122 |
continue;
|
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} |
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qemu_opts_loc_restore(dinfo->opts); |
125 |
if (!scsi_bus_legacy_add_drive(bus, dinfo->bdrv, unit, false)) { |
126 |
res = -1;
|
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break;
|
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} |
129 |
} |
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loc_pop(&loc); |
131 |
return res;
|
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} |
133 |
|
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SCSIRequest *scsi_req_alloc(size_t size, SCSIDevice *d, uint32_t tag, uint32_t lun) |
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{ |
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SCSIRequest *req; |
137 |
|
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req = qemu_mallocz(size); |
139 |
req->refcount = 1;
|
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req->bus = scsi_bus_from_device(d); |
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req->dev = d; |
142 |
req->tag = tag; |
143 |
req->lun = lun; |
144 |
req->status = -1;
|
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trace_scsi_req_alloc(req->dev->id, req->lun, req->tag); |
146 |
return req;
|
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} |
148 |
|
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SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun) |
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{ |
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return d->info->alloc_req(d, tag, lun);
|
152 |
} |
153 |
|
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uint8_t *scsi_req_get_buf(SCSIRequest *req) |
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{ |
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return req->dev->info->get_buf(req);
|
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} |
158 |
|
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int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len) |
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{ |
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if (req->dev->info->get_sense) {
|
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return req->dev->info->get_sense(req, buf, len);
|
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} else {
|
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return 0; |
165 |
} |
166 |
} |
167 |
|
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int32_t scsi_req_enqueue(SCSIRequest *req, uint8_t *buf) |
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{ |
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int32_t rc; |
171 |
|
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assert(!req->enqueued); |
173 |
scsi_req_ref(req); |
174 |
req->enqueued = true;
|
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QTAILQ_INSERT_TAIL(&req->dev->requests, req, next); |
176 |
|
177 |
scsi_req_ref(req); |
178 |
rc = req->dev->info->send_command(req, buf); |
179 |
scsi_req_unref(req); |
180 |
return rc;
|
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} |
182 |
|
183 |
static void scsi_req_dequeue(SCSIRequest *req) |
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{ |
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trace_scsi_req_dequeue(req->dev->id, req->lun, req->tag); |
186 |
if (req->enqueued) {
|
187 |
QTAILQ_REMOVE(&req->dev->requests, req, next); |
188 |
req->enqueued = false;
|
189 |
scsi_req_unref(req); |
190 |
} |
191 |
} |
192 |
|
193 |
static int scsi_req_length(SCSIRequest *req, uint8_t *cmd) |
194 |
{ |
195 |
switch (cmd[0] >> 5) { |
196 |
case 0: |
197 |
req->cmd.xfer = cmd[4];
|
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req->cmd.len = 6;
|
199 |
/* length 0 means 256 blocks */
|
200 |
if (req->cmd.xfer == 0) |
201 |
req->cmd.xfer = 256;
|
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break;
|
203 |
case 1: |
204 |
case 2: |
205 |
req->cmd.xfer = cmd[8] | (cmd[7] << 8); |
206 |
req->cmd.len = 10;
|
207 |
break;
|
208 |
case 4: |
209 |
req->cmd.xfer = cmd[13] | (cmd[12] << 8) | (cmd[11] << 16) | (cmd[10] << 24); |
210 |
req->cmd.len = 16;
|
211 |
break;
|
212 |
case 5: |
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req->cmd.xfer = cmd[9] | (cmd[8] << 8) | (cmd[7] << 16) | (cmd[6] << 24); |
214 |
req->cmd.len = 12;
|
215 |
break;
|
216 |
default:
|
217 |
trace_scsi_req_parse_bad(req->dev->id, req->lun, req->tag, cmd[0]);
|
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return -1; |
219 |
} |
220 |
|
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switch(cmd[0]) { |
222 |
case TEST_UNIT_READY:
|
223 |
case REZERO_UNIT:
|
224 |
case START_STOP:
|
225 |
case SEEK_6:
|
226 |
case WRITE_FILEMARKS:
|
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case SPACE:
|
228 |
case RESERVE:
|
229 |
case RELEASE:
|
230 |
case ERASE:
|
231 |
case ALLOW_MEDIUM_REMOVAL:
|
232 |
case VERIFY:
|
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case SEEK_10:
|
234 |
case SYNCHRONIZE_CACHE:
|
235 |
case LOCK_UNLOCK_CACHE:
|
236 |
case LOAD_UNLOAD:
|
237 |
case SET_CD_SPEED:
|
238 |
case SET_LIMITS:
|
239 |
case WRITE_LONG:
|
240 |
case MOVE_MEDIUM:
|
241 |
case UPDATE_BLOCK:
|
242 |
req->cmd.xfer = 0;
|
243 |
break;
|
244 |
case MODE_SENSE:
|
245 |
break;
|
246 |
case WRITE_SAME:
|
247 |
req->cmd.xfer = 1;
|
248 |
break;
|
249 |
case READ_CAPACITY:
|
250 |
req->cmd.xfer = 8;
|
251 |
break;
|
252 |
case READ_BLOCK_LIMITS:
|
253 |
req->cmd.xfer = 6;
|
254 |
break;
|
255 |
case READ_POSITION:
|
256 |
req->cmd.xfer = 20;
|
257 |
break;
|
258 |
case SEND_VOLUME_TAG:
|
259 |
req->cmd.xfer *= 40;
|
260 |
break;
|
261 |
case MEDIUM_SCAN:
|
262 |
req->cmd.xfer *= 8;
|
263 |
break;
|
264 |
case WRITE_10:
|
265 |
case WRITE_VERIFY:
|
266 |
case WRITE_6:
|
267 |
case WRITE_12:
|
268 |
case WRITE_VERIFY_12:
|
269 |
case WRITE_16:
|
270 |
case WRITE_VERIFY_16:
|
271 |
req->cmd.xfer *= req->dev->blocksize; |
272 |
break;
|
273 |
case READ_10:
|
274 |
case READ_6:
|
275 |
case READ_REVERSE:
|
276 |
case RECOVER_BUFFERED_DATA:
|
277 |
case READ_12:
|
278 |
case READ_16:
|
279 |
req->cmd.xfer *= req->dev->blocksize; |
280 |
break;
|
281 |
case INQUIRY:
|
282 |
req->cmd.xfer = cmd[4] | (cmd[3] << 8); |
283 |
break;
|
284 |
case MAINTENANCE_OUT:
|
285 |
case MAINTENANCE_IN:
|
286 |
if (req->dev->type == TYPE_ROM) {
|
287 |
/* GPCMD_REPORT_KEY and GPCMD_SEND_KEY from multi media commands */
|
288 |
req->cmd.xfer = cmd[9] | (cmd[8] << 8); |
289 |
} |
290 |
break;
|
291 |
} |
292 |
return 0; |
293 |
} |
294 |
|
295 |
static int scsi_req_stream_length(SCSIRequest *req, uint8_t *cmd) |
296 |
{ |
297 |
switch(cmd[0]) { |
298 |
/* stream commands */
|
299 |
case READ_6:
|
300 |
case READ_REVERSE:
|
301 |
case RECOVER_BUFFERED_DATA:
|
302 |
case WRITE_6:
|
303 |
req->cmd.len = 6;
|
304 |
req->cmd.xfer = cmd[4] | (cmd[3] << 8) | (cmd[2] << 16); |
305 |
if (cmd[1] & 0x01) /* fixed */ |
306 |
req->cmd.xfer *= req->dev->blocksize; |
307 |
break;
|
308 |
case REWIND:
|
309 |
case START_STOP:
|
310 |
req->cmd.len = 6;
|
311 |
req->cmd.xfer = 0;
|
312 |
break;
|
313 |
/* generic commands */
|
314 |
default:
|
315 |
return scsi_req_length(req, cmd);
|
316 |
} |
317 |
return 0; |
318 |
} |
319 |
|
320 |
static void scsi_req_xfer_mode(SCSIRequest *req) |
321 |
{ |
322 |
switch (req->cmd.buf[0]) { |
323 |
case WRITE_6:
|
324 |
case WRITE_10:
|
325 |
case WRITE_VERIFY:
|
326 |
case WRITE_12:
|
327 |
case WRITE_VERIFY_12:
|
328 |
case WRITE_16:
|
329 |
case WRITE_VERIFY_16:
|
330 |
case COPY:
|
331 |
case COPY_VERIFY:
|
332 |
case COMPARE:
|
333 |
case CHANGE_DEFINITION:
|
334 |
case LOG_SELECT:
|
335 |
case MODE_SELECT:
|
336 |
case MODE_SELECT_10:
|
337 |
case SEND_DIAGNOSTIC:
|
338 |
case WRITE_BUFFER:
|
339 |
case FORMAT_UNIT:
|
340 |
case REASSIGN_BLOCKS:
|
341 |
case SEARCH_EQUAL:
|
342 |
case SEARCH_HIGH:
|
343 |
case SEARCH_LOW:
|
344 |
case UPDATE_BLOCK:
|
345 |
case WRITE_LONG:
|
346 |
case WRITE_SAME:
|
347 |
case SEARCH_HIGH_12:
|
348 |
case SEARCH_EQUAL_12:
|
349 |
case SEARCH_LOW_12:
|
350 |
case SET_WINDOW:
|
351 |
case MEDIUM_SCAN:
|
352 |
case SEND_VOLUME_TAG:
|
353 |
case WRITE_LONG_2:
|
354 |
case PERSISTENT_RESERVE_OUT:
|
355 |
case MAINTENANCE_OUT:
|
356 |
req->cmd.mode = SCSI_XFER_TO_DEV; |
357 |
break;
|
358 |
default:
|
359 |
if (req->cmd.xfer)
|
360 |
req->cmd.mode = SCSI_XFER_FROM_DEV; |
361 |
else {
|
362 |
req->cmd.mode = SCSI_XFER_NONE; |
363 |
} |
364 |
break;
|
365 |
} |
366 |
} |
367 |
|
368 |
static uint64_t scsi_req_lba(SCSIRequest *req)
|
369 |
{ |
370 |
uint8_t *buf = req->cmd.buf; |
371 |
uint64_t lba; |
372 |
|
373 |
switch (buf[0] >> 5) { |
374 |
case 0: |
375 |
lba = (uint64_t) buf[3] | ((uint64_t) buf[2] << 8) | |
376 |
(((uint64_t) buf[1] & 0x1f) << 16); |
377 |
break;
|
378 |
case 1: |
379 |
case 2: |
380 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
381 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
382 |
break;
|
383 |
case 4: |
384 |
lba = (uint64_t) buf[9] | ((uint64_t) buf[8] << 8) | |
385 |
((uint64_t) buf[7] << 16) | ((uint64_t) buf[6] << 24) | |
386 |
((uint64_t) buf[5] << 32) | ((uint64_t) buf[4] << 40) | |
387 |
((uint64_t) buf[3] << 48) | ((uint64_t) buf[2] << 56); |
388 |
break;
|
389 |
case 5: |
390 |
lba = (uint64_t) buf[5] | ((uint64_t) buf[4] << 8) | |
391 |
((uint64_t) buf[3] << 16) | ((uint64_t) buf[2] << 24); |
392 |
break;
|
393 |
default:
|
394 |
lba = -1;
|
395 |
|
396 |
} |
397 |
return lba;
|
398 |
} |
399 |
|
400 |
int scsi_req_parse(SCSIRequest *req, uint8_t *buf)
|
401 |
{ |
402 |
int rc;
|
403 |
|
404 |
if (req->dev->type == TYPE_TAPE) {
|
405 |
rc = scsi_req_stream_length(req, buf); |
406 |
} else {
|
407 |
rc = scsi_req_length(req, buf); |
408 |
} |
409 |
if (rc != 0) |
410 |
return rc;
|
411 |
|
412 |
memcpy(req->cmd.buf, buf, req->cmd.len); |
413 |
scsi_req_xfer_mode(req); |
414 |
req->cmd.lba = scsi_req_lba(req); |
415 |
trace_scsi_req_parsed(req->dev->id, req->lun, req->tag, buf[0],
|
416 |
req->cmd.mode, req->cmd.xfer, req->cmd.lba); |
417 |
return 0; |
418 |
} |
419 |
|
420 |
/*
|
421 |
* Predefined sense codes
|
422 |
*/
|
423 |
|
424 |
/* No sense data available */
|
425 |
const struct SCSISense sense_code_NO_SENSE = { |
426 |
.key = NO_SENSE , .asc = 0x00 , .ascq = 0x00 |
427 |
}; |
428 |
|
429 |
/* LUN not ready, Manual intervention required */
|
430 |
const struct SCSISense sense_code_LUN_NOT_READY = { |
431 |
.key = NOT_READY, .asc = 0x04, .ascq = 0x03 |
432 |
}; |
433 |
|
434 |
/* LUN not ready, Medium not present */
|
435 |
const struct SCSISense sense_code_NO_MEDIUM = { |
436 |
.key = NOT_READY, .asc = 0x3a, .ascq = 0x00 |
437 |
}; |
438 |
|
439 |
/* Hardware error, internal target failure */
|
440 |
const struct SCSISense sense_code_TARGET_FAILURE = { |
441 |
.key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00 |
442 |
}; |
443 |
|
444 |
/* Illegal request, invalid command operation code */
|
445 |
const struct SCSISense sense_code_INVALID_OPCODE = { |
446 |
.key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00 |
447 |
}; |
448 |
|
449 |
/* Illegal request, LBA out of range */
|
450 |
const struct SCSISense sense_code_LBA_OUT_OF_RANGE = { |
451 |
.key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00 |
452 |
}; |
453 |
|
454 |
/* Illegal request, Invalid field in CDB */
|
455 |
const struct SCSISense sense_code_INVALID_FIELD = { |
456 |
.key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00 |
457 |
}; |
458 |
|
459 |
/* Illegal request, LUN not supported */
|
460 |
const struct SCSISense sense_code_LUN_NOT_SUPPORTED = { |
461 |
.key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00 |
462 |
}; |
463 |
|
464 |
/* Command aborted, I/O process terminated */
|
465 |
const struct SCSISense sense_code_IO_ERROR = { |
466 |
.key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06 |
467 |
}; |
468 |
|
469 |
/* Command aborted, I_T Nexus loss occurred */
|
470 |
const struct SCSISense sense_code_I_T_NEXUS_LOSS = { |
471 |
.key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07 |
472 |
}; |
473 |
|
474 |
/* Command aborted, Logical Unit failure */
|
475 |
const struct SCSISense sense_code_LUN_FAILURE = { |
476 |
.key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01 |
477 |
}; |
478 |
|
479 |
/*
|
480 |
* scsi_build_sense
|
481 |
*
|
482 |
* Build a sense buffer
|
483 |
*/
|
484 |
int scsi_build_sense(SCSISense sense, uint8_t *buf, int len, int fixed) |
485 |
{ |
486 |
if (!fixed && len < 8) { |
487 |
return 0; |
488 |
} |
489 |
|
490 |
memset(buf, 0, len);
|
491 |
if (fixed) {
|
492 |
/* Return fixed format sense buffer */
|
493 |
buf[0] = 0xf0; |
494 |
buf[2] = sense.key;
|
495 |
buf[7] = 7; |
496 |
buf[12] = sense.asc;
|
497 |
buf[13] = sense.ascq;
|
498 |
return MIN(len, 18); |
499 |
} else {
|
500 |
/* Return descriptor format sense buffer */
|
501 |
buf[0] = 0x72; |
502 |
buf[1] = sense.key;
|
503 |
buf[2] = sense.asc;
|
504 |
buf[3] = sense.ascq;
|
505 |
return 8; |
506 |
} |
507 |
} |
508 |
|
509 |
static const char *scsi_command_name(uint8_t cmd) |
510 |
{ |
511 |
static const char *names[] = { |
512 |
[ TEST_UNIT_READY ] = "TEST_UNIT_READY",
|
513 |
[ REZERO_UNIT ] = "REZERO_UNIT",
|
514 |
/* REWIND and REZERO_UNIT use the same operation code */
|
515 |
[ REQUEST_SENSE ] = "REQUEST_SENSE",
|
516 |
[ FORMAT_UNIT ] = "FORMAT_UNIT",
|
517 |
[ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS",
|
518 |
[ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS",
|
519 |
[ READ_6 ] = "READ_6",
|
520 |
[ WRITE_6 ] = "WRITE_6",
|
521 |
[ SEEK_6 ] = "SEEK_6",
|
522 |
[ READ_REVERSE ] = "READ_REVERSE",
|
523 |
[ WRITE_FILEMARKS ] = "WRITE_FILEMARKS",
|
524 |
[ SPACE ] = "SPACE",
|
525 |
[ INQUIRY ] = "INQUIRY",
|
526 |
[ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA",
|
527 |
[ MAINTENANCE_IN ] = "MAINTENANCE_IN",
|
528 |
[ MAINTENANCE_OUT ] = "MAINTENANCE_OUT",
|
529 |
[ MODE_SELECT ] = "MODE_SELECT",
|
530 |
[ RESERVE ] = "RESERVE",
|
531 |
[ RELEASE ] = "RELEASE",
|
532 |
[ COPY ] = "COPY",
|
533 |
[ ERASE ] = "ERASE",
|
534 |
[ MODE_SENSE ] = "MODE_SENSE",
|
535 |
[ START_STOP ] = "START_STOP",
|
536 |
[ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC",
|
537 |
[ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC",
|
538 |
[ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL",
|
539 |
|
540 |
[ SET_WINDOW ] = "SET_WINDOW",
|
541 |
[ READ_CAPACITY ] = "READ_CAPACITY",
|
542 |
[ READ_10 ] = "READ_10",
|
543 |
[ WRITE_10 ] = "WRITE_10",
|
544 |
[ SEEK_10 ] = "SEEK_10",
|
545 |
[ WRITE_VERIFY ] = "WRITE_VERIFY",
|
546 |
[ VERIFY ] = "VERIFY",
|
547 |
[ SEARCH_HIGH ] = "SEARCH_HIGH",
|
548 |
[ SEARCH_EQUAL ] = "SEARCH_EQUAL",
|
549 |
[ SEARCH_LOW ] = "SEARCH_LOW",
|
550 |
[ SET_LIMITS ] = "SET_LIMITS",
|
551 |
[ PRE_FETCH ] = "PRE_FETCH",
|
552 |
/* READ_POSITION and PRE_FETCH use the same operation code */
|
553 |
[ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE",
|
554 |
[ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE",
|
555 |
[ READ_DEFECT_DATA ] = "READ_DEFECT_DATA",
|
556 |
[ MEDIUM_SCAN ] = "MEDIUM_SCAN",
|
557 |
[ COMPARE ] = "COMPARE",
|
558 |
[ COPY_VERIFY ] = "COPY_VERIFY",
|
559 |
[ WRITE_BUFFER ] = "WRITE_BUFFER",
|
560 |
[ READ_BUFFER ] = "READ_BUFFER",
|
561 |
[ UPDATE_BLOCK ] = "UPDATE_BLOCK",
|
562 |
[ READ_LONG ] = "READ_LONG",
|
563 |
[ WRITE_LONG ] = "WRITE_LONG",
|
564 |
[ CHANGE_DEFINITION ] = "CHANGE_DEFINITION",
|
565 |
[ WRITE_SAME ] = "WRITE_SAME",
|
566 |
[ READ_TOC ] = "READ_TOC",
|
567 |
[ LOG_SELECT ] = "LOG_SELECT",
|
568 |
[ LOG_SENSE ] = "LOG_SENSE",
|
569 |
[ MODE_SELECT_10 ] = "MODE_SELECT_10",
|
570 |
[ RESERVE_10 ] = "RESERVE_10",
|
571 |
[ RELEASE_10 ] = "RELEASE_10",
|
572 |
[ MODE_SENSE_10 ] = "MODE_SENSE_10",
|
573 |
[ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN",
|
574 |
[ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT",
|
575 |
[ MOVE_MEDIUM ] = "MOVE_MEDIUM",
|
576 |
[ READ_12 ] = "READ_12",
|
577 |
[ WRITE_12 ] = "WRITE_12",
|
578 |
[ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12",
|
579 |
[ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12",
|
580 |
[ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12",
|
581 |
[ SEARCH_LOW_12 ] = "SEARCH_LOW_12",
|
582 |
[ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS",
|
583 |
[ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG",
|
584 |
[ WRITE_LONG_2 ] = "WRITE_LONG_2",
|
585 |
|
586 |
[ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT",
|
587 |
[ GET_CONFIGURATION ] = "GET_CONFIGURATION",
|
588 |
[ READ_16 ] = "READ_16",
|
589 |
[ WRITE_16 ] = "WRITE_16",
|
590 |
[ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16",
|
591 |
[ SERVICE_ACTION_IN ] = "SERVICE_ACTION_IN",
|
592 |
[ REPORT_LUNS ] = "REPORT_LUNS",
|
593 |
[ LOAD_UNLOAD ] = "LOAD_UNLOAD",
|
594 |
[ SET_CD_SPEED ] = "SET_CD_SPEED",
|
595 |
[ BLANK ] = "BLANK",
|
596 |
}; |
597 |
|
598 |
if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) |
599 |
return "*UNKNOWN*"; |
600 |
return names[cmd];
|
601 |
} |
602 |
|
603 |
SCSIRequest *scsi_req_ref(SCSIRequest *req) |
604 |
{ |
605 |
req->refcount++; |
606 |
return req;
|
607 |
} |
608 |
|
609 |
void scsi_req_unref(SCSIRequest *req)
|
610 |
{ |
611 |
if (--req->refcount == 0) { |
612 |
if (req->dev->info->free_req) {
|
613 |
req->dev->info->free_req(req); |
614 |
} |
615 |
qemu_free(req); |
616 |
} |
617 |
} |
618 |
|
619 |
/* Tell the device that we finished processing this chunk of I/O. It
|
620 |
will start the next chunk or complete the command. */
|
621 |
void scsi_req_continue(SCSIRequest *req)
|
622 |
{ |
623 |
trace_scsi_req_continue(req->dev->id, req->lun, req->tag); |
624 |
if (req->cmd.mode == SCSI_XFER_TO_DEV) {
|
625 |
req->dev->info->write_data(req); |
626 |
} else {
|
627 |
req->dev->info->read_data(req); |
628 |
} |
629 |
} |
630 |
|
631 |
/* Called by the devices when data is ready for the HBA. The HBA should
|
632 |
start a DMA operation to read or fill the device's data buffer.
|
633 |
Once it completes, calling scsi_req_continue will restart I/O. */
|
634 |
void scsi_req_data(SCSIRequest *req, int len) |
635 |
{ |
636 |
trace_scsi_req_data(req->dev->id, req->lun, req->tag, len); |
637 |
req->bus->ops->complete(req, SCSI_REASON_DATA, len); |
638 |
} |
639 |
|
640 |
void scsi_req_print(SCSIRequest *req)
|
641 |
{ |
642 |
FILE *fp = stderr; |
643 |
int i;
|
644 |
|
645 |
fprintf(fp, "[%s id=%d] %s",
|
646 |
req->dev->qdev.parent_bus->name, |
647 |
req->dev->id, |
648 |
scsi_command_name(req->cmd.buf[0]));
|
649 |
for (i = 1; i < req->cmd.len; i++) { |
650 |
fprintf(fp, " 0x%02x", req->cmd.buf[i]);
|
651 |
} |
652 |
switch (req->cmd.mode) {
|
653 |
case SCSI_XFER_NONE:
|
654 |
fprintf(fp, " - none\n");
|
655 |
break;
|
656 |
case SCSI_XFER_FROM_DEV:
|
657 |
fprintf(fp, " - from-dev len=%zd\n", req->cmd.xfer);
|
658 |
break;
|
659 |
case SCSI_XFER_TO_DEV:
|
660 |
fprintf(fp, " - to-dev len=%zd\n", req->cmd.xfer);
|
661 |
break;
|
662 |
default:
|
663 |
fprintf(fp, " - Oops\n");
|
664 |
break;
|
665 |
} |
666 |
} |
667 |
|
668 |
void scsi_req_complete(SCSIRequest *req)
|
669 |
{ |
670 |
assert(req->status != -1);
|
671 |
scsi_req_ref(req); |
672 |
scsi_req_dequeue(req); |
673 |
req->bus->ops->complete(req, SCSI_REASON_DONE, req->status); |
674 |
scsi_req_unref(req); |
675 |
} |
676 |
|
677 |
void scsi_req_cancel(SCSIRequest *req)
|
678 |
{ |
679 |
if (req->dev && req->dev->info->cancel_io) {
|
680 |
req->dev->info->cancel_io(req); |
681 |
} |
682 |
scsi_req_ref(req); |
683 |
scsi_req_dequeue(req); |
684 |
if (req->bus->ops->cancel) {
|
685 |
req->bus->ops->cancel(req); |
686 |
} |
687 |
scsi_req_unref(req); |
688 |
} |
689 |
|
690 |
void scsi_req_abort(SCSIRequest *req, int status) |
691 |
{ |
692 |
req->status = status; |
693 |
if (req->dev && req->dev->info->cancel_io) {
|
694 |
req->dev->info->cancel_io(req); |
695 |
} |
696 |
scsi_req_complete(req); |
697 |
} |
698 |
|
699 |
void scsi_device_purge_requests(SCSIDevice *sdev)
|
700 |
{ |
701 |
SCSIRequest *req; |
702 |
|
703 |
while (!QTAILQ_EMPTY(&sdev->requests)) {
|
704 |
req = QTAILQ_FIRST(&sdev->requests); |
705 |
scsi_req_cancel(req); |
706 |
} |
707 |
} |
708 |
|
709 |
static char *scsibus_get_fw_dev_path(DeviceState *dev) |
710 |
{ |
711 |
SCSIDevice *d = (SCSIDevice*)dev; |
712 |
SCSIBus *bus = scsi_bus_from_device(d); |
713 |
char path[100]; |
714 |
int i;
|
715 |
|
716 |
for (i = 0; i < bus->ndev; i++) { |
717 |
if (bus->devs[i] == d) {
|
718 |
break;
|
719 |
} |
720 |
} |
721 |
|
722 |
assert(i != bus->ndev); |
723 |
|
724 |
snprintf(path, sizeof(path), "%s@%x", qdev_fw_name(dev), i); |
725 |
|
726 |
return strdup(path);
|
727 |
} |