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Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20150702-v3' into staging
[qemu/ar7.git] / hw / usb / dev-uas.c
blob38b26c586d3ca06add6e744db3706231a99ddc87
1 /*
2 * UAS (USB Attached SCSI) emulation
3 *
4 * Copyright Red Hat, Inc. 2012
5 *
6 * Author: Gerd Hoffmann <kraxel@redhat.com>
7 *
8 * This work is licensed under the terms of the GNU GPL, version 2 or later.
9 * See the COPYING file in the top-level directory.
10 */
11
12 #include "qemu-common.h"
13 #include "qemu/option.h"
14 #include "qemu/config-file.h"
15 #include "trace.h"
16 #include "qemu/error-report.h"
17
18 #include "hw/usb.h"
19 #include "hw/usb/desc.h"
20 #include "hw/scsi/scsi.h"
21 #include "block/scsi.h"
22
23 /* --------------------------------------------------------------------- */
24
25 #define UAS_UI_COMMAND 0x01
26 #define UAS_UI_SENSE 0x03
27 #define UAS_UI_RESPONSE 0x04
28 #define UAS_UI_TASK_MGMT 0x05
29 #define UAS_UI_READ_READY 0x06
30 #define UAS_UI_WRITE_READY 0x07
31
32 #define UAS_RC_TMF_COMPLETE 0x00
33 #define UAS_RC_INVALID_INFO_UNIT 0x02
34 #define UAS_RC_TMF_NOT_SUPPORTED 0x04
35 #define UAS_RC_TMF_FAILED 0x05
36 #define UAS_RC_TMF_SUCCEEDED 0x08
37 #define UAS_RC_INCORRECT_LUN 0x09
38 #define UAS_RC_OVERLAPPED_TAG 0x0a
39
40 #define UAS_TMF_ABORT_TASK 0x01
41 #define UAS_TMF_ABORT_TASK_SET 0x02
42 #define UAS_TMF_CLEAR_TASK_SET 0x04
43 #define UAS_TMF_LOGICAL_UNIT_RESET 0x08
44 #define UAS_TMF_I_T_NEXUS_RESET 0x10
45 #define UAS_TMF_CLEAR_ACA 0x40
46 #define UAS_TMF_QUERY_TASK 0x80
47 #define UAS_TMF_QUERY_TASK_SET 0x81
48 #define UAS_TMF_QUERY_ASYNC_EVENT 0x82
49
50 #define UAS_PIPE_ID_COMMAND 0x01
51 #define UAS_PIPE_ID_STATUS 0x02
52 #define UAS_PIPE_ID_DATA_IN 0x03
53 #define UAS_PIPE_ID_DATA_OUT 0x04
54
55 typedef struct {
56 uint8_t id;
57 uint8_t reserved;
58 uint16_t tag;
59 } QEMU_PACKED uas_iu_header;
60
61 typedef struct {
62 uint8_t prio_taskattr; /* 6:3 priority, 2:0 task attribute */
63 uint8_t reserved_1;
64 uint8_t add_cdb_length; /* 7:2 additional adb length (dwords) */
65 uint8_t reserved_2;
66 uint64_t lun;
67 uint8_t cdb[16];
68 uint8_t add_cdb[];
69 } QEMU_PACKED uas_iu_command;
70
71 typedef struct {
72 uint16_t status_qualifier;
73 uint8_t status;
74 uint8_t reserved[7];
75 uint16_t sense_length;
76 uint8_t sense_data[18];
77 } QEMU_PACKED uas_iu_sense;
78
79 typedef struct {
80 uint8_t add_response_info[3];
81 uint8_t response_code;
82 } QEMU_PACKED uas_iu_response;
83
84 typedef struct {
85 uint8_t function;
86 uint8_t reserved;
87 uint16_t task_tag;
88 uint64_t lun;
89 } QEMU_PACKED uas_iu_task_mgmt;
90
91 typedef struct {
92 uas_iu_header hdr;
93 union {
94 uas_iu_command command;
95 uas_iu_sense sense;
96 uas_iu_task_mgmt task;
97 uas_iu_response response;
98 };
99 } QEMU_PACKED uas_iu;
100
101 /* --------------------------------------------------------------------- */
102
103 #define UAS_STREAM_BM_ATTR 4
104 #define UAS_MAX_STREAMS (1 << UAS_STREAM_BM_ATTR)
105
106 typedef struct UASDevice UASDevice;
107 typedef struct UASRequest UASRequest;
108 typedef struct UASStatus UASStatus;
109
110 struct UASDevice {
111 USBDevice dev;
112 SCSIBus bus;
113 QEMUBH *status_bh;
114 QTAILQ_HEAD(, UASStatus) results;
115 QTAILQ_HEAD(, UASRequest) requests;
116
117 /* properties */
118 uint32_t requestlog;
119
120 /* usb 2.0 only */
121 USBPacket *status2;
122 UASRequest *datain2;
123 UASRequest *dataout2;
124
125 /* usb 3.0 only */
126 USBPacket *data3[UAS_MAX_STREAMS + 1];
127 USBPacket *status3[UAS_MAX_STREAMS + 1];
128 };
129
130 #define TYPE_USB_UAS "usb-uas"
131 #define USB_UAS(obj) OBJECT_CHECK(UASDevice, (obj), TYPE_USB_UAS)
132
133 struct UASRequest {
134 uint16_t tag;
135 uint64_t lun;
136 UASDevice *uas;
137 SCSIDevice *dev;
138 SCSIRequest *req;
139 USBPacket *data;
140 bool data_async;
141 bool active;
142 bool complete;
143 uint32_t buf_off;
144 uint32_t buf_size;
145 uint32_t data_off;
146 uint32_t data_size;
147 QTAILQ_ENTRY(UASRequest) next;
148 };
149
150 struct UASStatus {
151 uint32_t stream;
152 uas_iu status;
153 uint32_t length;
154 QTAILQ_ENTRY(UASStatus) next;
155 };
156
157 /* --------------------------------------------------------------------- */
158
159 enum {
160 STR_MANUFACTURER = 1,
161 STR_PRODUCT,
162 STR_SERIALNUMBER,
163 STR_CONFIG_HIGH,
164 STR_CONFIG_SUPER,
165 };
166
167 static const USBDescStrings desc_strings = {
168 [STR_MANUFACTURER] = "QEMU",
169 [STR_PRODUCT] = "USB Attached SCSI HBA",
170 [STR_SERIALNUMBER] = "27842",
171 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
172 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)",
173 };
174
175 static const USBDescIface desc_iface_high = {
176 .bInterfaceNumber = 0,
177 .bNumEndpoints = 4,
178 .bInterfaceClass = USB_CLASS_MASS_STORAGE,
179 .bInterfaceSubClass = 0x06, /* SCSI */
180 .bInterfaceProtocol = 0x62, /* UAS */
181 .eps = (USBDescEndpoint[]) {
182 {
183 .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_COMMAND,
184 .bmAttributes = USB_ENDPOINT_XFER_BULK,
185 .wMaxPacketSize = 512,
186 .extra = (uint8_t[]) {
187 0x04, /* u8 bLength */
188 0x24, /* u8 bDescriptorType */
189 UAS_PIPE_ID_COMMAND,
190 0x00, /* u8 bReserved */
191 },
192 },{
193 .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_STATUS,
194 .bmAttributes = USB_ENDPOINT_XFER_BULK,
195 .wMaxPacketSize = 512,
196 .extra = (uint8_t[]) {
197 0x04, /* u8 bLength */
198 0x24, /* u8 bDescriptorType */
199 UAS_PIPE_ID_STATUS,
200 0x00, /* u8 bReserved */
201 },
202 },{
203 .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_DATA_IN,
204 .bmAttributes = USB_ENDPOINT_XFER_BULK,
205 .wMaxPacketSize = 512,
206 .extra = (uint8_t[]) {
207 0x04, /* u8 bLength */
208 0x24, /* u8 bDescriptorType */
209 UAS_PIPE_ID_DATA_IN,
210 0x00, /* u8 bReserved */
211 },
212 },{
213 .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_DATA_OUT,
214 .bmAttributes = USB_ENDPOINT_XFER_BULK,
215 .wMaxPacketSize = 512,
216 .extra = (uint8_t[]) {
217 0x04, /* u8 bLength */
218 0x24, /* u8 bDescriptorType */
219 UAS_PIPE_ID_DATA_OUT,
220 0x00, /* u8 bReserved */
221 },
222 },
223 }
224 };
225
226 static const USBDescIface desc_iface_super = {
227 .bInterfaceNumber = 0,
228 .bNumEndpoints = 4,
229 .bInterfaceClass = USB_CLASS_MASS_STORAGE,
230 .bInterfaceSubClass = 0x06, /* SCSI */
231 .bInterfaceProtocol = 0x62, /* UAS */
232 .eps = (USBDescEndpoint[]) {
233 {
234 .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_COMMAND,
235 .bmAttributes = USB_ENDPOINT_XFER_BULK,
236 .wMaxPacketSize = 1024,
237 .bMaxBurst = 15,
238 .extra = (uint8_t[]) {
239 0x04, /* u8 bLength */
240 0x24, /* u8 bDescriptorType */
241 UAS_PIPE_ID_COMMAND,
242 0x00, /* u8 bReserved */
243 },
244 },{
245 .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_STATUS,
246 .bmAttributes = USB_ENDPOINT_XFER_BULK,
247 .wMaxPacketSize = 1024,
248 .bMaxBurst = 15,
249 .bmAttributes_super = UAS_STREAM_BM_ATTR,
250 .extra = (uint8_t[]) {
251 0x04, /* u8 bLength */
252 0x24, /* u8 bDescriptorType */
253 UAS_PIPE_ID_STATUS,
254 0x00, /* u8 bReserved */
255 },
256 },{
257 .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_DATA_IN,
258 .bmAttributes = USB_ENDPOINT_XFER_BULK,
259 .wMaxPacketSize = 1024,
260 .bMaxBurst = 15,
261 .bmAttributes_super = UAS_STREAM_BM_ATTR,
262 .extra = (uint8_t[]) {
263 0x04, /* u8 bLength */
264 0x24, /* u8 bDescriptorType */
265 UAS_PIPE_ID_DATA_IN,
266 0x00, /* u8 bReserved */
267 },
268 },{
269 .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_DATA_OUT,
270 .bmAttributes = USB_ENDPOINT_XFER_BULK,
271 .wMaxPacketSize = 1024,
272 .bMaxBurst = 15,
273 .bmAttributes_super = UAS_STREAM_BM_ATTR,
274 .extra = (uint8_t[]) {
275 0x04, /* u8 bLength */
276 0x24, /* u8 bDescriptorType */
277 UAS_PIPE_ID_DATA_OUT,
278 0x00, /* u8 bReserved */
279 },
280 },
281 }
282 };
283
284 static const USBDescDevice desc_device_high = {
285 .bcdUSB = 0x0200,
286 .bMaxPacketSize0 = 64,
287 .bNumConfigurations = 1,
288 .confs = (USBDescConfig[]) {
289 {
290 .bNumInterfaces = 1,
291 .bConfigurationValue = 1,
292 .iConfiguration = STR_CONFIG_HIGH,
293 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER,
294 .nif = 1,
295 .ifs = &desc_iface_high,
296 },
297 },
298 };
299
300 static const USBDescDevice desc_device_super = {
301 .bcdUSB = 0x0300,
302 .bMaxPacketSize0 = 64,
303 .bNumConfigurations = 1,
304 .confs = (USBDescConfig[]) {
305 {
306 .bNumInterfaces = 1,
307 .bConfigurationValue = 1,
308 .iConfiguration = STR_CONFIG_SUPER,
309 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER,
310 .nif = 1,
311 .ifs = &desc_iface_super,
312 },
313 },
314 };
315
316 static const USBDesc desc = {
317 .id = {
318 .idVendor = 0x46f4, /* CRC16() of "QEMU" */
319 .idProduct = 0x0003,
320 .bcdDevice = 0,
321 .iManufacturer = STR_MANUFACTURER,
322 .iProduct = STR_PRODUCT,
323 .iSerialNumber = STR_SERIALNUMBER,
324 },
325 .high = &desc_device_high,
326 .super = &desc_device_super,
327 .str = desc_strings,
328 };
329
330 /* --------------------------------------------------------------------- */
331
332 static bool uas_using_streams(UASDevice *uas)
333 {
334 return uas->dev.speed == USB_SPEED_SUPER;
335 }
336
337 /* --------------------------------------------------------------------- */
338
339 static UASStatus *usb_uas_alloc_status(UASDevice *uas, uint8_t id, uint16_t tag)
340 {
341 UASStatus *st = g_new0(UASStatus, 1);
342
343 st->status.hdr.id = id;
344 st->status.hdr.tag = cpu_to_be16(tag);
345 st->length = sizeof(uas_iu_header);
346 if (uas_using_streams(uas)) {
347 st->stream = tag;
348 }
349 return st;
350 }
351
352 static void usb_uas_send_status_bh(void *opaque)
353 {
354 UASDevice *uas = opaque;
355 UASStatus *st;
356 USBPacket *p;
357
358 while ((st = QTAILQ_FIRST(&uas->results)) != NULL) {
359 if (uas_using_streams(uas)) {
360 p = uas->status3[st->stream];
361 uas->status3[st->stream] = NULL;
362 } else {
363 p = uas->status2;
364 uas->status2 = NULL;
365 }
366 if (p == NULL) {
367 break;
368 }
369
370 usb_packet_copy(p, &st->status, st->length);
371 QTAILQ_REMOVE(&uas->results, st, next);
372 g_free(st);
373
374 p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */
375 usb_packet_complete(&uas->dev, p);
376 }
377 }
378
379 static void usb_uas_queue_status(UASDevice *uas, UASStatus *st, int length)
380 {
381 USBPacket *p = uas_using_streams(uas) ?
382 uas->status3[st->stream] : uas->status2;
383
384 st->length += length;
385 QTAILQ_INSERT_TAIL(&uas->results, st, next);
386 if (p) {
387 /*
388 * Just schedule bh make sure any in-flight data transaction
389 * is finished before completing (sending) the status packet.
390 */
391 qemu_bh_schedule(uas->status_bh);
392 } else {
393 USBEndpoint *ep = usb_ep_get(&uas->dev, USB_TOKEN_IN,
394 UAS_PIPE_ID_STATUS);
395 usb_wakeup(ep, st->stream);
396 }
397 }
398
399 static void usb_uas_queue_response(UASDevice *uas, uint16_t tag, uint8_t code)
400 {
401 UASStatus *st = usb_uas_alloc_status(uas, UAS_UI_RESPONSE, tag);
402
403 trace_usb_uas_response(uas->dev.addr, tag, code);
404 st->status.response.response_code = code;
405 usb_uas_queue_status(uas, st, sizeof(uas_iu_response));
406 }
407
408 static void usb_uas_queue_sense(UASRequest *req, uint8_t status)
409 {
410 UASStatus *st = usb_uas_alloc_status(req->uas, UAS_UI_SENSE, req->tag);
411 int len, slen = 0;
412
413 trace_usb_uas_sense(req->uas->dev.addr, req->tag, status);
414 st->status.sense.status = status;
415 st->status.sense.status_qualifier = cpu_to_be16(0);
416 if (status != GOOD) {
417 slen = scsi_req_get_sense(req->req, st->status.sense.sense_data,
418 sizeof(st->status.sense.sense_data));
419 st->status.sense.sense_length = cpu_to_be16(slen);
420 }
421 len = sizeof(uas_iu_sense) - sizeof(st->status.sense.sense_data) + slen;
422 usb_uas_queue_status(req->uas, st, len);
423 }
424
425 static void usb_uas_queue_fake_sense(UASDevice *uas, uint16_t tag,
426 struct SCSISense sense)
427 {
428 UASStatus *st = usb_uas_alloc_status(uas, UAS_UI_SENSE, tag);
429 int len, slen = 0;
430
431 st->status.sense.status = CHECK_CONDITION;
432 st->status.sense.status_qualifier = cpu_to_be16(0);
433 st->status.sense.sense_data[0] = 0x70;
434 st->status.sense.sense_data[2] = sense.key;
435 st->status.sense.sense_data[7] = 10;
436 st->status.sense.sense_data[12] = sense.asc;
437 st->status.sense.sense_data[13] = sense.ascq;
438 slen = 18;
439 len = sizeof(uas_iu_sense) - sizeof(st->status.sense.sense_data) + slen;
440 usb_uas_queue_status(uas, st, len);
441 }
442
443 static void usb_uas_queue_read_ready(UASRequest *req)
444 {
445 UASStatus *st = usb_uas_alloc_status(req->uas, UAS_UI_READ_READY,
446 req->tag);
447
448 trace_usb_uas_read_ready(req->uas->dev.addr, req->tag);
449 usb_uas_queue_status(req->uas, st, 0);
450 }
451
452 static void usb_uas_queue_write_ready(UASRequest *req)
453 {
454 UASStatus *st = usb_uas_alloc_status(req->uas, UAS_UI_WRITE_READY,
455 req->tag);
456
457 trace_usb_uas_write_ready(req->uas->dev.addr, req->tag);
458 usb_uas_queue_status(req->uas, st, 0);
459 }
460
461 /* --------------------------------------------------------------------- */
462
463 static int usb_uas_get_lun(uint64_t lun64)
464 {
465 return (lun64 >> 48) & 0xff;
466 }
467
468 static SCSIDevice *usb_uas_get_dev(UASDevice *uas, uint64_t lun64)
469 {
470 if ((lun64 >> 56) != 0x00) {
471 return NULL;
472 }
473 return scsi_device_find(&uas->bus, 0, 0, usb_uas_get_lun(lun64));
474 }
475
476 static void usb_uas_complete_data_packet(UASRequest *req)
477 {
478 USBPacket *p;
479
480 if (!req->data_async) {
481 return;
482 }
483 p = req->data;
484 req->data = NULL;
485 req->data_async = false;
486 p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */
487 usb_packet_complete(&req->uas->dev, p);
488 }
489
490 static void usb_uas_copy_data(UASRequest *req)
491 {
492 uint32_t length;
493
494 length = MIN(req->buf_size - req->buf_off,
495 req->data->iov.size - req->data->actual_length);
496 trace_usb_uas_xfer_data(req->uas->dev.addr, req->tag, length,
497 req->data->actual_length, req->data->iov.size,
498 req->buf_off, req->buf_size);
499 usb_packet_copy(req->data, scsi_req_get_buf(req->req) + req->buf_off,
500 length);
501 req->buf_off += length;
502 req->data_off += length;
503
504 if (req->data->actual_length == req->data->iov.size) {
505 usb_uas_complete_data_packet(req);
506 }
507 if (req->buf_size && req->buf_off == req->buf_size) {
508 req->buf_off = 0;
509 req->buf_size = 0;
510 scsi_req_continue(req->req);
511 }
512 }
513
514 static void usb_uas_start_next_transfer(UASDevice *uas)
515 {
516 UASRequest *req;
517
518 if (uas_using_streams(uas)) {
519 return;
520 }
521
522 QTAILQ_FOREACH(req, &uas->requests, next) {
523 if (req->active || req->complete) {
524 continue;
525 }
526 if (req->req->cmd.mode == SCSI_XFER_FROM_DEV && uas->datain2 == NULL) {
527 uas->datain2 = req;
528 usb_uas_queue_read_ready(req);
529 req->active = true;
530 return;
531 }
532 if (req->req->cmd.mode == SCSI_XFER_TO_DEV && uas->dataout2 == NULL) {
533 uas->dataout2 = req;
534 usb_uas_queue_write_ready(req);
535 req->active = true;
536 return;
537 }
538 }
539 }
540
541 static UASRequest *usb_uas_alloc_request(UASDevice *uas, uas_iu *iu)
542 {
543 UASRequest *req;
544
545 req = g_new0(UASRequest, 1);
546 req->uas = uas;
547 req->tag = be16_to_cpu(iu->hdr.tag);
548 req->lun = be64_to_cpu(iu->command.lun);
549 req->dev = usb_uas_get_dev(req->uas, req->lun);
550 return req;
551 }
552
553 static void usb_uas_scsi_free_request(SCSIBus *bus, void *priv)
554 {
555 UASRequest *req = priv;
556 UASDevice *uas = req->uas;
557
558 if (req == uas->datain2) {
559 uas->datain2 = NULL;
560 }
561 if (req == uas->dataout2) {
562 uas->dataout2 = NULL;
563 }
564 QTAILQ_REMOVE(&uas->requests, req, next);
565 g_free(req);
566 usb_uas_start_next_transfer(uas);
567 }
568
569 static UASRequest *usb_uas_find_request(UASDevice *uas, uint16_t tag)
570 {
571 UASRequest *req;
572
573 QTAILQ_FOREACH(req, &uas->requests, next) {
574 if (req->tag == tag) {
575 return req;
576 }
577 }
578 return NULL;
579 }
580
581 static void usb_uas_scsi_transfer_data(SCSIRequest *r, uint32_t len)
582 {
583 UASRequest *req = r->hba_private;
584
585 trace_usb_uas_scsi_data(req->uas->dev.addr, req->tag, len);
586 req->buf_off = 0;
587 req->buf_size = len;
588 if (req->data) {
589 usb_uas_copy_data(req);
590 } else {
591 usb_uas_start_next_transfer(req->uas);
592 }
593 }
594
595 static void usb_uas_scsi_command_complete(SCSIRequest *r,
596 uint32_t status, size_t resid)
597 {
598 UASRequest *req = r->hba_private;
599
600 trace_usb_uas_scsi_complete(req->uas->dev.addr, req->tag, status, resid);
601 req->complete = true;
602 if (req->data) {
603 usb_uas_complete_data_packet(req);
604 }
605 usb_uas_queue_sense(req, status);
606 scsi_req_unref(req->req);
607 }
608
609 static void usb_uas_scsi_request_cancelled(SCSIRequest *r)
610 {
611 UASRequest *req = r->hba_private;
612
613 /* FIXME: queue notification to status pipe? */
614 scsi_req_unref(req->req);
615 }
616
617 static const struct SCSIBusInfo usb_uas_scsi_info = {
618 .tcq = true,
619 .max_target = 0,
620 .max_lun = 255,
621
622 .transfer_data = usb_uas_scsi_transfer_data,
623 .complete = usb_uas_scsi_command_complete,
624 .cancel = usb_uas_scsi_request_cancelled,
625 .free_request = usb_uas_scsi_free_request,
626 };
627
628 /* --------------------------------------------------------------------- */
629
630 static void usb_uas_handle_reset(USBDevice *dev)
631 {
632 UASDevice *uas = USB_UAS(dev);
633 UASRequest *req, *nreq;
634 UASStatus *st, *nst;
635
636 trace_usb_uas_reset(dev->addr);
637 QTAILQ_FOREACH_SAFE(req, &uas->requests, next, nreq) {
638 scsi_req_cancel(req->req);
639 }
640 QTAILQ_FOREACH_SAFE(st, &uas->results, next, nst) {
641 QTAILQ_REMOVE(&uas->results, st, next);
642 g_free(st);
643 }
644 }
645
646 static void usb_uas_handle_control(USBDevice *dev, USBPacket *p,
647 int request, int value, int index, int length, uint8_t *data)
648 {
649 int ret;
650
651 ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
652 if (ret >= 0) {
653 return;
654 }
655 error_report("%s: unhandled control request", __func__);
656 p->status = USB_RET_STALL;
657 }
658
659 static void usb_uas_cancel_io(USBDevice *dev, USBPacket *p)
660 {
661 UASDevice *uas = USB_UAS(dev);
662 UASRequest *req, *nreq;
663 int i;
664
665 if (uas->status2 == p) {
666 uas->status2 = NULL;
667 qemu_bh_cancel(uas->status_bh);
668 return;
669 }
670 if (uas_using_streams(uas)) {
671 for (i = 0; i <= UAS_MAX_STREAMS; i++) {
672 if (uas->status3[i] == p) {
673 uas->status3[i] = NULL;
674 return;
675 }
676 if (uas->data3[i] == p) {
677 uas->data3[i] = NULL;
678 return;
679 }
680 }
681 }
682 QTAILQ_FOREACH_SAFE(req, &uas->requests, next, nreq) {
683 if (req->data == p) {
684 req->data = NULL;
685 return;
686 }
687 }
688 assert(!"canceled usb packet not found");
689 }
690
691 static void usb_uas_command(UASDevice *uas, uas_iu *iu)
692 {
693 UASRequest *req;
694 uint32_t len;
695 uint16_t tag = be16_to_cpu(iu->hdr.tag);
696
697 if (uas_using_streams(uas) && tag > UAS_MAX_STREAMS) {
698 goto invalid_tag;
699 }
700 req = usb_uas_find_request(uas, tag);
701 if (req) {
702 goto overlapped_tag;
703 }
704 req = usb_uas_alloc_request(uas, iu);
705 if (req->dev == NULL) {
706 goto bad_target;
707 }
708
709 trace_usb_uas_command(uas->dev.addr, req->tag,
710 usb_uas_get_lun(req->lun),
711 req->lun >> 32, req->lun & 0xffffffff);
712 QTAILQ_INSERT_TAIL(&uas->requests, req, next);
713 if (uas_using_streams(uas) && uas->data3[req->tag] != NULL) {
714 req->data = uas->data3[req->tag];
715 req->data_async = true;
716 uas->data3[req->tag] = NULL;
717 }
718
719 req->req = scsi_req_new(req->dev, req->tag,
720 usb_uas_get_lun(req->lun),
721 iu->command.cdb, req);
722 if (uas->requestlog) {
723 scsi_req_print(req->req);
724 }
725 len = scsi_req_enqueue(req->req);
726 if (len) {
727 req->data_size = len;
728 scsi_req_continue(req->req);
729 }
730 return;
731
732 invalid_tag:
733 usb_uas_queue_fake_sense(uas, tag, sense_code_INVALID_TAG);
734 return;
735
736 overlapped_tag:
737 usb_uas_queue_fake_sense(uas, tag, sense_code_OVERLAPPED_COMMANDS);
738 return;
739
740 bad_target:
741 usb_uas_queue_fake_sense(uas, tag, sense_code_LUN_NOT_SUPPORTED);
742 g_free(req);
743 }
744
745 static void usb_uas_task(UASDevice *uas, uas_iu *iu)
746 {
747 uint16_t tag = be16_to_cpu(iu->hdr.tag);
748 uint64_t lun64 = be64_to_cpu(iu->task.lun);
749 SCSIDevice *dev = usb_uas_get_dev(uas, lun64);
750 int lun = usb_uas_get_lun(lun64);
751 UASRequest *req;
752 uint16_t task_tag;
753
754 if (uas_using_streams(uas) && tag > UAS_MAX_STREAMS) {
755 goto invalid_tag;
756 }
757 req = usb_uas_find_request(uas, be16_to_cpu(iu->hdr.tag));
758 if (req) {
759 goto overlapped_tag;
760 }
761 if (dev == NULL) {
762 goto incorrect_lun;
763 }
764
765 switch (iu->task.function) {
766 case UAS_TMF_ABORT_TASK:
767 task_tag = be16_to_cpu(iu->task.task_tag);
768 trace_usb_uas_tmf_abort_task(uas->dev.addr, tag, task_tag);
769 req = usb_uas_find_request(uas, task_tag);
770 if (req && req->dev == dev) {
771 scsi_req_cancel(req->req);
772 }
773 usb_uas_queue_response(uas, tag, UAS_RC_TMF_COMPLETE);
774 break;
775
776 case UAS_TMF_LOGICAL_UNIT_RESET:
777 trace_usb_uas_tmf_logical_unit_reset(uas->dev.addr, tag, lun);
778 qdev_reset_all(&dev->qdev);
779 usb_uas_queue_response(uas, tag, UAS_RC_TMF_COMPLETE);
780 break;
781
782 default:
783 trace_usb_uas_tmf_unsupported(uas->dev.addr, tag, iu->task.function);
784 usb_uas_queue_response(uas, tag, UAS_RC_TMF_NOT_SUPPORTED);
785 break;
786 }
787 return;
788
789 invalid_tag:
790 usb_uas_queue_response(uas, tag, UAS_RC_INVALID_INFO_UNIT);
791 return;
792
793 overlapped_tag:
794 usb_uas_queue_response(uas, req->tag, UAS_RC_OVERLAPPED_TAG);
795 return;
796
797 incorrect_lun:
798 usb_uas_queue_response(uas, tag, UAS_RC_INCORRECT_LUN);
799 }
800
801 static void usb_uas_handle_data(USBDevice *dev, USBPacket *p)
802 {
803 UASDevice *uas = USB_UAS(dev);
804 uas_iu iu;
805 UASStatus *st;
806 UASRequest *req;
807 int length;
808
809 switch (p->ep->nr) {
810 case UAS_PIPE_ID_COMMAND:
811 length = MIN(sizeof(iu), p->iov.size);
812 usb_packet_copy(p, &iu, length);
813 switch (iu.hdr.id) {
814 case UAS_UI_COMMAND:
815 usb_uas_command(uas, &iu);
816 break;
817 case UAS_UI_TASK_MGMT:
818 usb_uas_task(uas, &iu);
819 break;
820 default:
821 error_report("%s: unknown command iu: id 0x%x",
822 __func__, iu.hdr.id);
823 p->status = USB_RET_STALL;
824 break;
825 }
826 break;
827 case UAS_PIPE_ID_STATUS:
828 if (p->stream) {
829 QTAILQ_FOREACH(st, &uas->results, next) {
830 if (st->stream == p->stream) {
831 break;
832 }
833 }
834 if (st == NULL) {
835 assert(uas->status3[p->stream] == NULL);
836 uas->status3[p->stream] = p;
837 p->status = USB_RET_ASYNC;
838 break;
839 }
840 } else {
841 st = QTAILQ_FIRST(&uas->results);
842 if (st == NULL) {
843 assert(uas->status2 == NULL);
844 uas->status2 = p;
845 p->status = USB_RET_ASYNC;
846 break;
847 }
848 }
849 usb_packet_copy(p, &st->status, st->length);
850 QTAILQ_REMOVE(&uas->results, st, next);
851 g_free(st);
852 break;
853 case UAS_PIPE_ID_DATA_IN:
854 case UAS_PIPE_ID_DATA_OUT:
855 if (p->stream) {
856 req = usb_uas_find_request(uas, p->stream);
857 } else {
858 req = (p->ep->nr == UAS_PIPE_ID_DATA_IN)
859 ? uas->datain2 : uas->dataout2;
860 }
861 if (req == NULL) {
862 if (p->stream) {
863 assert(uas->data3[p->stream] == NULL);
864 uas->data3[p->stream] = p;
865 p->status = USB_RET_ASYNC;
866 break;
867 } else {
868 error_report("%s: no inflight request", __func__);
869 p->status = USB_RET_STALL;
870 break;
871 }
872 }
873 scsi_req_ref(req->req);
874 req->data = p;
875 usb_uas_copy_data(req);
876 if (p->actual_length == p->iov.size || req->complete) {
877 req->data = NULL;
878 } else {
879 req->data_async = true;
880 p->status = USB_RET_ASYNC;
881 }
882 scsi_req_unref(req->req);
883 usb_uas_start_next_transfer(uas);
884 break;
885 default:
886 error_report("%s: invalid endpoint %d", __func__, p->ep->nr);
887 p->status = USB_RET_STALL;
888 break;
889 }
890 }
891
892 static void usb_uas_handle_destroy(USBDevice *dev)
893 {
894 UASDevice *uas = USB_UAS(dev);
895
896 qemu_bh_delete(uas->status_bh);
897 }
898
899 static void usb_uas_realize(USBDevice *dev, Error **errp)
900 {
901 UASDevice *uas = USB_UAS(dev);
902
903 usb_desc_create_serial(dev);
904 usb_desc_init(dev);
905
906 QTAILQ_INIT(&uas->results);
907 QTAILQ_INIT(&uas->requests);
908 uas->status_bh = qemu_bh_new(usb_uas_send_status_bh, uas);
909
910 scsi_bus_new(&uas->bus, sizeof(uas->bus), DEVICE(dev),
911 &usb_uas_scsi_info, NULL);
912 }
913
914 static const VMStateDescription vmstate_usb_uas = {
915 .name = "usb-uas",
916 .unmigratable = 1,
917 .fields = (VMStateField[]) {
918 VMSTATE_USB_DEVICE(dev, UASDevice),
919 VMSTATE_END_OF_LIST()
920 }
921 };
922
923 static Property uas_properties[] = {
924 DEFINE_PROP_UINT32("log-scsi-req", UASDevice, requestlog, 0),
925 DEFINE_PROP_END_OF_LIST(),
926 };
927
928 static void usb_uas_class_initfn(ObjectClass *klass, void *data)
929 {
930 DeviceClass *dc = DEVICE_CLASS(klass);
931 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
932
933 uc->realize = usb_uas_realize;
934 uc->product_desc = desc_strings[STR_PRODUCT];
935 uc->usb_desc = &desc;
936 uc->cancel_packet = usb_uas_cancel_io;
937 uc->handle_attach = usb_desc_attach;
938 uc->handle_reset = usb_uas_handle_reset;
939 uc->handle_control = usb_uas_handle_control;
940 uc->handle_data = usb_uas_handle_data;
941 uc->handle_destroy = usb_uas_handle_destroy;
942 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
943 dc->fw_name = "storage";
944 dc->vmsd = &vmstate_usb_uas;
945 dc->props = uas_properties;
946 }
947
948 static const TypeInfo uas_info = {
949 .name = TYPE_USB_UAS,
950 .parent = TYPE_USB_DEVICE,
951 .instance_size = sizeof(UASDevice),
952 .class_init = usb_uas_class_initfn,
953 };
954
955 static void usb_uas_register_types(void)
956 {
957 type_register_static(&uas_info);
958 }
959
960 type_init(usb_uas_register_types)
AR7 emulation for QEMU