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[thirdparty/qemu.git] / hw / usb / dev-uas.c
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/osdep.h"
13 #include "qemu/option.h"
14 #include "qemu/config-file.h"
15 #include "trace.h"
16 #include "qemu/error-report.h"
17 #include "qemu/main-loop.h"
18 #include "qemu/module.h"
19
20 #include "hw/usb.h"
21 #include "migration/vmstate.h"
22 #include "desc.h"
23 #include "hw/qdev-properties.h"
24 #include "hw/scsi/scsi.h"
25 #include "scsi/constants.h"
26 #include "qom/object.h"
27
28 /* --------------------------------------------------------------------- */
29
30 #define UAS_UI_COMMAND 0x01
31 #define UAS_UI_SENSE 0x03
32 #define UAS_UI_RESPONSE 0x04
33 #define UAS_UI_TASK_MGMT 0x05
34 #define UAS_UI_READ_READY 0x06
35 #define UAS_UI_WRITE_READY 0x07
36
37 #define UAS_RC_TMF_COMPLETE 0x00
38 #define UAS_RC_INVALID_INFO_UNIT 0x02
39 #define UAS_RC_TMF_NOT_SUPPORTED 0x04
40 #define UAS_RC_TMF_FAILED 0x05
41 #define UAS_RC_TMF_SUCCEEDED 0x08
42 #define UAS_RC_INCORRECT_LUN 0x09
43 #define UAS_RC_OVERLAPPED_TAG 0x0a
44
45 #define UAS_TMF_ABORT_TASK 0x01
46 #define UAS_TMF_ABORT_TASK_SET 0x02
47 #define UAS_TMF_CLEAR_TASK_SET 0x04
48 #define UAS_TMF_LOGICAL_UNIT_RESET 0x08
49 #define UAS_TMF_I_T_NEXUS_RESET 0x10
50 #define UAS_TMF_CLEAR_ACA 0x40
51 #define UAS_TMF_QUERY_TASK 0x80
52 #define UAS_TMF_QUERY_TASK_SET 0x81
53 #define UAS_TMF_QUERY_ASYNC_EVENT 0x82
54
55 #define UAS_PIPE_ID_COMMAND 0x01
56 #define UAS_PIPE_ID_STATUS 0x02
57 #define UAS_PIPE_ID_DATA_IN 0x03
58 #define UAS_PIPE_ID_DATA_OUT 0x04
59
60 typedef struct {
61 uint8_t id;
62 uint8_t reserved;
63 uint16_t tag;
64 } QEMU_PACKED uas_iu_header;
65
66 typedef struct {
67 uint8_t prio_taskattr; /* 6:3 priority, 2:0 task attribute */
68 uint8_t reserved_1;
69 uint8_t add_cdb_length; /* 7:2 additional adb length (dwords) */
70 uint8_t reserved_2;
71 uint64_t lun;
72 uint8_t cdb[16];
73 uint8_t add_cdb[];
74 } QEMU_PACKED uas_iu_command;
75
76 typedef struct {
77 uint16_t status_qualifier;
78 uint8_t status;
79 uint8_t reserved[7];
80 uint16_t sense_length;
81 uint8_t sense_data[18];
82 } QEMU_PACKED uas_iu_sense;
83
84 typedef struct {
85 uint8_t add_response_info[3];
86 uint8_t response_code;
87 } QEMU_PACKED uas_iu_response;
88
89 typedef struct {
90 uint8_t function;
91 uint8_t reserved;
92 uint16_t task_tag;
93 uint64_t lun;
94 } QEMU_PACKED uas_iu_task_mgmt;
95
96 typedef struct {
97 uas_iu_header hdr;
98 union {
99 uas_iu_command command;
100 uas_iu_sense sense;
101 uas_iu_task_mgmt task;
102 uas_iu_response response;
103 };
104 } QEMU_PACKED uas_iu;
105
106 /* --------------------------------------------------------------------- */
107
108 #define UAS_STREAM_BM_ATTR 4
109 #define UAS_MAX_STREAMS (1 << UAS_STREAM_BM_ATTR)
110
111 typedef struct UASDevice UASDevice;
112 typedef struct UASRequest UASRequest;
113 typedef struct UASStatus UASStatus;
114
115 struct UASDevice {
116 USBDevice dev;
117 SCSIBus bus;
118 QEMUBH *status_bh;
119 QTAILQ_HEAD(, UASStatus) results;
120 QTAILQ_HEAD(, UASRequest) requests;
121
122 /* properties */
123 uint32_t requestlog;
124
125 /* usb 2.0 only */
126 USBPacket *status2;
127 UASRequest *datain2;
128 UASRequest *dataout2;
129
130 /* usb 3.0 only */
131 USBPacket *data3[UAS_MAX_STREAMS + 1];
132 USBPacket *status3[UAS_MAX_STREAMS + 1];
133 };
134
135 #define TYPE_USB_UAS "usb-uas"
136 OBJECT_DECLARE_SIMPLE_TYPE(UASDevice, USB_UAS)
137
138 struct UASRequest {
139 uint16_t tag;
140 uint64_t lun;
141 UASDevice *uas;
142 SCSIDevice *dev;
143 SCSIRequest *req;
144 USBPacket *data;
145 bool data_async;
146 bool active;
147 bool complete;
148 uint32_t buf_off;
149 uint32_t buf_size;
150 uint32_t data_off;
151 uint32_t data_size;
152 QTAILQ_ENTRY(UASRequest) next;
153 };
154
155 struct UASStatus {
156 uint32_t stream;
157 uas_iu status;
158 uint32_t length;
159 QTAILQ_ENTRY(UASStatus) next;
160 };
161
162 /* --------------------------------------------------------------------- */
163
164 enum {
165 STR_MANUFACTURER = 1,
166 STR_PRODUCT,
167 STR_SERIALNUMBER,
168 STR_CONFIG_HIGH,
169 STR_CONFIG_SUPER,
170 };
171
172 static const USBDescStrings desc_strings = {
173 [STR_MANUFACTURER] = "QEMU",
174 [STR_PRODUCT] = "USB Attached SCSI HBA",
175 [STR_SERIALNUMBER] = "27842",
176 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
177 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)",
178 };
179
180 static const USBDescIface desc_iface_high = {
181 .bInterfaceNumber = 0,
182 .bNumEndpoints = 4,
183 .bInterfaceClass = USB_CLASS_MASS_STORAGE,
184 .bInterfaceSubClass = 0x06, /* SCSI */
185 .bInterfaceProtocol = 0x62, /* UAS */
186 .eps = (USBDescEndpoint[]) {
187 {
188 .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_COMMAND,
189 .bmAttributes = USB_ENDPOINT_XFER_BULK,
190 .wMaxPacketSize = 512,
191 .extra = (uint8_t[]) {
192 0x04, /* u8 bLength */
193 0x24, /* u8 bDescriptorType */
194 UAS_PIPE_ID_COMMAND,
195 0x00, /* u8 bReserved */
196 },
197 },{
198 .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_STATUS,
199 .bmAttributes = USB_ENDPOINT_XFER_BULK,
200 .wMaxPacketSize = 512,
201 .extra = (uint8_t[]) {
202 0x04, /* u8 bLength */
203 0x24, /* u8 bDescriptorType */
204 UAS_PIPE_ID_STATUS,
205 0x00, /* u8 bReserved */
206 },
207 },{
208 .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_DATA_IN,
209 .bmAttributes = USB_ENDPOINT_XFER_BULK,
210 .wMaxPacketSize = 512,
211 .extra = (uint8_t[]) {
212 0x04, /* u8 bLength */
213 0x24, /* u8 bDescriptorType */
214 UAS_PIPE_ID_DATA_IN,
215 0x00, /* u8 bReserved */
216 },
217 },{
218 .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_DATA_OUT,
219 .bmAttributes = USB_ENDPOINT_XFER_BULK,
220 .wMaxPacketSize = 512,
221 .extra = (uint8_t[]) {
222 0x04, /* u8 bLength */
223 0x24, /* u8 bDescriptorType */
224 UAS_PIPE_ID_DATA_OUT,
225 0x00, /* u8 bReserved */
226 },
227 },
228 }
229 };
230
231 static const USBDescIface desc_iface_super = {
232 .bInterfaceNumber = 0,
233 .bNumEndpoints = 4,
234 .bInterfaceClass = USB_CLASS_MASS_STORAGE,
235 .bInterfaceSubClass = 0x06, /* SCSI */
236 .bInterfaceProtocol = 0x62, /* UAS */
237 .eps = (USBDescEndpoint[]) {
238 {
239 .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_COMMAND,
240 .bmAttributes = USB_ENDPOINT_XFER_BULK,
241 .wMaxPacketSize = 1024,
242 .bMaxBurst = 15,
243 .extra = (uint8_t[]) {
244 0x04, /* u8 bLength */
245 0x24, /* u8 bDescriptorType */
246 UAS_PIPE_ID_COMMAND,
247 0x00, /* u8 bReserved */
248 },
249 },{
250 .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_STATUS,
251 .bmAttributes = USB_ENDPOINT_XFER_BULK,
252 .wMaxPacketSize = 1024,
253 .bMaxBurst = 15,
254 .bmAttributes_super = UAS_STREAM_BM_ATTR,
255 .extra = (uint8_t[]) {
256 0x04, /* u8 bLength */
257 0x24, /* u8 bDescriptorType */
258 UAS_PIPE_ID_STATUS,
259 0x00, /* u8 bReserved */
260 },
261 },{
262 .bEndpointAddress = USB_DIR_IN | UAS_PIPE_ID_DATA_IN,
263 .bmAttributes = USB_ENDPOINT_XFER_BULK,
264 .wMaxPacketSize = 1024,
265 .bMaxBurst = 15,
266 .bmAttributes_super = UAS_STREAM_BM_ATTR,
267 .extra = (uint8_t[]) {
268 0x04, /* u8 bLength */
269 0x24, /* u8 bDescriptorType */
270 UAS_PIPE_ID_DATA_IN,
271 0x00, /* u8 bReserved */
272 },
273 },{
274 .bEndpointAddress = USB_DIR_OUT | UAS_PIPE_ID_DATA_OUT,
275 .bmAttributes = USB_ENDPOINT_XFER_BULK,
276 .wMaxPacketSize = 1024,
277 .bMaxBurst = 15,
278 .bmAttributes_super = UAS_STREAM_BM_ATTR,
279 .extra = (uint8_t[]) {
280 0x04, /* u8 bLength */
281 0x24, /* u8 bDescriptorType */
282 UAS_PIPE_ID_DATA_OUT,
283 0x00, /* u8 bReserved */
284 },
285 },
286 }
287 };
288
289 static const USBDescDevice desc_device_high = {
290 .bcdUSB = 0x0200,
291 .bMaxPacketSize0 = 64,
292 .bNumConfigurations = 1,
293 .confs = (USBDescConfig[]) {
294 {
295 .bNumInterfaces = 1,
296 .bConfigurationValue = 1,
297 .iConfiguration = STR_CONFIG_HIGH,
298 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER,
299 .nif = 1,
300 .ifs = &desc_iface_high,
301 },
302 },
303 };
304
305 static const USBDescDevice desc_device_super = {
306 .bcdUSB = 0x0300,
307 .bMaxPacketSize0 = 9,
308 .bNumConfigurations = 1,
309 .confs = (USBDescConfig[]) {
310 {
311 .bNumInterfaces = 1,
312 .bConfigurationValue = 1,
313 .iConfiguration = STR_CONFIG_SUPER,
314 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER,
315 .nif = 1,
316 .ifs = &desc_iface_super,
317 },
318 },
319 };
320
321 static const USBDesc desc = {
322 .id = {
323 .idVendor = 0x46f4, /* CRC16() of "QEMU" */
324 .idProduct = 0x0003,
325 .bcdDevice = 0,
326 .iManufacturer = STR_MANUFACTURER,
327 .iProduct = STR_PRODUCT,
328 .iSerialNumber = STR_SERIALNUMBER,
329 },
330 .high = &desc_device_high,
331 .super = &desc_device_super,
332 .str = desc_strings,
333 };
334
335 /* --------------------------------------------------------------------- */
336
337 static bool uas_using_streams(UASDevice *uas)
338 {
339 return uas->dev.speed == USB_SPEED_SUPER;
340 }
341
342 /* --------------------------------------------------------------------- */
343
344 static UASStatus *usb_uas_alloc_status(UASDevice *uas, uint8_t id, uint16_t tag)
345 {
346 UASStatus *st = g_new0(UASStatus, 1);
347
348 st->status.hdr.id = id;
349 st->status.hdr.tag = cpu_to_be16(tag);
350 st->length = sizeof(uas_iu_header);
351 if (uas_using_streams(uas)) {
352 st->stream = tag;
353 }
354 return st;
355 }
356
357 static void usb_uas_send_status_bh(void *opaque)
358 {
359 UASDevice *uas = opaque;
360 UASStatus *st;
361 USBPacket *p;
362
363 while ((st = QTAILQ_FIRST(&uas->results)) != NULL) {
364 if (uas_using_streams(uas)) {
365 p = uas->status3[st->stream];
366 uas->status3[st->stream] = NULL;
367 } else {
368 p = uas->status2;
369 uas->status2 = NULL;
370 }
371 if (p == NULL) {
372 break;
373 }
374
375 usb_packet_copy(p, &st->status, st->length);
376 QTAILQ_REMOVE(&uas->results, st, next);
377 g_free(st);
378
379 p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */
380 usb_packet_complete(&uas->dev, p);
381 }
382 }
383
384 static void usb_uas_queue_status(UASDevice *uas, UASStatus *st, int length)
385 {
386 USBPacket *p = uas_using_streams(uas) ?
387 uas->status3[st->stream] : uas->status2;
388
389 st->length += length;
390 QTAILQ_INSERT_TAIL(&uas->results, st, next);
391 if (p) {
392 /*
393 * Just schedule bh make sure any in-flight data transaction
394 * is finished before completing (sending) the status packet.
395 */
396 qemu_bh_schedule(uas->status_bh);
397 } else {
398 USBEndpoint *ep = usb_ep_get(&uas->dev, USB_TOKEN_IN,
399 UAS_PIPE_ID_STATUS);
400 usb_wakeup(ep, st->stream);
401 }
402 }
403
404 static void usb_uas_queue_response(UASDevice *uas, uint16_t tag, uint8_t code)
405 {
406 UASStatus *st = usb_uas_alloc_status(uas, UAS_UI_RESPONSE, tag);
407
408 trace_usb_uas_response(uas->dev.addr, tag, code);
409 st->status.response.response_code = code;
410 usb_uas_queue_status(uas, st, sizeof(uas_iu_response));
411 }
412
413 static void usb_uas_queue_sense(UASRequest *req, uint8_t status)
414 {
415 UASStatus *st = usb_uas_alloc_status(req->uas, UAS_UI_SENSE, req->tag);
416 int len, slen = 0;
417
418 trace_usb_uas_sense(req->uas->dev.addr, req->tag, status);
419 st->status.sense.status = status;
420 st->status.sense.status_qualifier = cpu_to_be16(0);
421 if (status != GOOD) {
422 slen = scsi_req_get_sense(req->req, st->status.sense.sense_data,
423 sizeof(st->status.sense.sense_data));
424 st->status.sense.sense_length = cpu_to_be16(slen);
425 }
426 len = sizeof(uas_iu_sense) - sizeof(st->status.sense.sense_data) + slen;
427 usb_uas_queue_status(req->uas, st, len);
428 }
429
430 static void usb_uas_queue_fake_sense(UASDevice *uas, uint16_t tag,
431 struct SCSISense sense)
432 {
433 UASStatus *st = usb_uas_alloc_status(uas, UAS_UI_SENSE, tag);
434 int len, slen = 0;
435
436 st->status.sense.status = CHECK_CONDITION;
437 st->status.sense.status_qualifier = cpu_to_be16(0);
438 st->status.sense.sense_data[0] = 0x70;
439 st->status.sense.sense_data[2] = sense.key;
440 st->status.sense.sense_data[7] = 10;
441 st->status.sense.sense_data[12] = sense.asc;
442 st->status.sense.sense_data[13] = sense.ascq;
443 slen = 18;
444 len = sizeof(uas_iu_sense) - sizeof(st->status.sense.sense_data) + slen;
445 usb_uas_queue_status(uas, st, len);
446 }
447
448 static void usb_uas_queue_read_ready(UASRequest *req)
449 {
450 UASStatus *st = usb_uas_alloc_status(req->uas, UAS_UI_READ_READY,
451 req->tag);
452
453 trace_usb_uas_read_ready(req->uas->dev.addr, req->tag);
454 usb_uas_queue_status(req->uas, st, 0);
455 }
456
457 static void usb_uas_queue_write_ready(UASRequest *req)
458 {
459 UASStatus *st = usb_uas_alloc_status(req->uas, UAS_UI_WRITE_READY,
460 req->tag);
461
462 trace_usb_uas_write_ready(req->uas->dev.addr, req->tag);
463 usb_uas_queue_status(req->uas, st, 0);
464 }
465
466 /* --------------------------------------------------------------------- */
467
468 static int usb_uas_get_lun(uint64_t lun64)
469 {
470 return (lun64 >> 48) & 0xff;
471 }
472
473 static SCSIDevice *usb_uas_get_dev(UASDevice *uas, uint64_t lun64)
474 {
475 if ((lun64 >> 56) != 0x00) {
476 return NULL;
477 }
478 return scsi_device_find(&uas->bus, 0, 0, usb_uas_get_lun(lun64));
479 }
480
481 static void usb_uas_complete_data_packet(UASRequest *req)
482 {
483 USBPacket *p;
484
485 if (!req->data_async) {
486 return;
487 }
488 p = req->data;
489 req->data = NULL;
490 req->data_async = false;
491 p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */
492 usb_packet_complete(&req->uas->dev, p);
493 }
494
495 static void usb_uas_copy_data(UASRequest *req)
496 {
497 uint32_t length;
498
499 length = MIN(req->buf_size - req->buf_off,
500 req->data->iov.size - req->data->actual_length);
501 trace_usb_uas_xfer_data(req->uas->dev.addr, req->tag, length,
502 req->data->actual_length, req->data->iov.size,
503 req->buf_off, req->buf_size);
504 usb_packet_copy(req->data, scsi_req_get_buf(req->req) + req->buf_off,
505 length);
506 req->buf_off += length;
507 req->data_off += length;
508
509 if (req->data->actual_length == req->data->iov.size) {
510 usb_uas_complete_data_packet(req);
511 }
512 if (req->buf_size && req->buf_off == req->buf_size) {
513 req->buf_off = 0;
514 req->buf_size = 0;
515 scsi_req_continue(req->req);
516 }
517 }
518
519 static void usb_uas_start_next_transfer(UASDevice *uas)
520 {
521 UASRequest *req;
522
523 if (uas_using_streams(uas)) {
524 return;
525 }
526
527 QTAILQ_FOREACH(req, &uas->requests, next) {
528 if (req->active || req->complete) {
529 continue;
530 }
531 if (req->req->cmd.mode == SCSI_XFER_FROM_DEV && uas->datain2 == NULL) {
532 uas->datain2 = req;
533 usb_uas_queue_read_ready(req);
534 req->active = true;
535 return;
536 }
537 if (req->req->cmd.mode == SCSI_XFER_TO_DEV && uas->dataout2 == NULL) {
538 uas->dataout2 = req;
539 usb_uas_queue_write_ready(req);
540 req->active = true;
541 return;
542 }
543 }
544 }
545
546 static UASRequest *usb_uas_alloc_request(UASDevice *uas, uas_iu *iu)
547 {
548 UASRequest *req;
549
550 req = g_new0(UASRequest, 1);
551 req->uas = uas;
552 req->tag = be16_to_cpu(iu->hdr.tag);
553 req->lun = be64_to_cpu(iu->command.lun);
554 req->dev = usb_uas_get_dev(req->uas, req->lun);
555 return req;
556 }
557
558 static void usb_uas_scsi_free_request(SCSIBus *bus, void *priv)
559 {
560 UASRequest *req = priv;
561 UASDevice *uas = req->uas;
562
563 if (req == uas->datain2) {
564 uas->datain2 = NULL;
565 }
566 if (req == uas->dataout2) {
567 uas->dataout2 = NULL;
568 }
569 QTAILQ_REMOVE(&uas->requests, req, next);
570 g_free(req);
571 usb_uas_start_next_transfer(uas);
572 }
573
574 static UASRequest *usb_uas_find_request(UASDevice *uas, uint16_t tag)
575 {
576 UASRequest *req;
577
578 QTAILQ_FOREACH(req, &uas->requests, next) {
579 if (req->tag == tag) {
580 return req;
581 }
582 }
583 return NULL;
584 }
585
586 static void usb_uas_scsi_transfer_data(SCSIRequest *r, uint32_t len)
587 {
588 UASRequest *req = r->hba_private;
589
590 trace_usb_uas_scsi_data(req->uas->dev.addr, req->tag, len);
591 req->buf_off = 0;
592 req->buf_size = len;
593 if (req->data) {
594 usb_uas_copy_data(req);
595 } else {
596 usb_uas_start_next_transfer(req->uas);
597 }
598 }
599
600 static void usb_uas_scsi_command_complete(SCSIRequest *r,
601 uint32_t status, size_t resid)
602 {
603 UASRequest *req = r->hba_private;
604
605 trace_usb_uas_scsi_complete(req->uas->dev.addr, req->tag, status, resid);
606 req->complete = true;
607 if (req->data) {
608 usb_uas_complete_data_packet(req);
609 }
610 usb_uas_queue_sense(req, status);
611 scsi_req_unref(req->req);
612 }
613
614 static void usb_uas_scsi_request_cancelled(SCSIRequest *r)
615 {
616 UASRequest *req = r->hba_private;
617
618 /* FIXME: queue notification to status pipe? */
619 scsi_req_unref(req->req);
620 }
621
622 static const struct SCSIBusInfo usb_uas_scsi_info = {
623 .tcq = true,
624 .max_target = 0,
625 .max_lun = 255,
626
627 .transfer_data = usb_uas_scsi_transfer_data,
628 .complete = usb_uas_scsi_command_complete,
629 .cancel = usb_uas_scsi_request_cancelled,
630 .free_request = usb_uas_scsi_free_request,
631 };
632
633 /* --------------------------------------------------------------------- */
634
635 static void usb_uas_handle_reset(USBDevice *dev)
636 {
637 UASDevice *uas = USB_UAS(dev);
638 UASRequest *req, *nreq;
639 UASStatus *st, *nst;
640
641 trace_usb_uas_reset(dev->addr);
642 QTAILQ_FOREACH_SAFE(req, &uas->requests, next, nreq) {
643 scsi_req_cancel(req->req);
644 }
645 QTAILQ_FOREACH_SAFE(st, &uas->results, next, nst) {
646 QTAILQ_REMOVE(&uas->results, st, next);
647 g_free(st);
648 }
649 }
650
651 static void usb_uas_handle_control(USBDevice *dev, USBPacket *p,
652 int request, int value, int index, int length, uint8_t *data)
653 {
654 int ret;
655
656 ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
657 if (ret >= 0) {
658 return;
659 }
660 error_report("%s: unhandled control request (req 0x%x, val 0x%x, idx 0x%x",
661 __func__, request, value, index);
662 p->status = USB_RET_STALL;
663 }
664
665 static void usb_uas_cancel_io(USBDevice *dev, USBPacket *p)
666 {
667 UASDevice *uas = USB_UAS(dev);
668 UASRequest *req, *nreq;
669 int i;
670
671 if (uas->status2 == p) {
672 uas->status2 = NULL;
673 qemu_bh_cancel(uas->status_bh);
674 return;
675 }
676 if (uas_using_streams(uas)) {
677 for (i = 0; i <= UAS_MAX_STREAMS; i++) {
678 if (uas->status3[i] == p) {
679 uas->status3[i] = NULL;
680 return;
681 }
682 if (uas->data3[i] == p) {
683 uas->data3[i] = NULL;
684 return;
685 }
686 }
687 }
688 QTAILQ_FOREACH_SAFE(req, &uas->requests, next, nreq) {
689 if (req->data == p) {
690 req->data = NULL;
691 return;
692 }
693 }
694 assert(!"canceled usb packet not found");
695 }
696
697 static void usb_uas_command(UASDevice *uas, uas_iu *iu)
698 {
699 UASRequest *req;
700 uint32_t len;
701 uint16_t tag = be16_to_cpu(iu->hdr.tag);
702
703 if (uas_using_streams(uas) && tag > UAS_MAX_STREAMS) {
704 goto invalid_tag;
705 }
706 req = usb_uas_find_request(uas, tag);
707 if (req) {
708 goto overlapped_tag;
709 }
710 req = usb_uas_alloc_request(uas, iu);
711 if (req->dev == NULL) {
712 goto bad_target;
713 }
714
715 trace_usb_uas_command(uas->dev.addr, req->tag,
716 usb_uas_get_lun(req->lun),
717 req->lun >> 32, req->lun & 0xffffffff);
718 QTAILQ_INSERT_TAIL(&uas->requests, req, next);
719 if (uas_using_streams(uas) && uas->data3[req->tag] != NULL) {
720 req->data = uas->data3[req->tag];
721 req->data_async = true;
722 uas->data3[req->tag] = NULL;
723 }
724
725 req->req = scsi_req_new(req->dev, req->tag,
726 usb_uas_get_lun(req->lun),
727 iu->command.cdb, req);
728 if (uas->requestlog) {
729 scsi_req_print(req->req);
730 }
731 len = scsi_req_enqueue(req->req);
732 if (len) {
733 req->data_size = len;
734 scsi_req_continue(req->req);
735 }
736 return;
737
738 invalid_tag:
739 usb_uas_queue_fake_sense(uas, tag, sense_code_INVALID_TAG);
740 return;
741
742 overlapped_tag:
743 usb_uas_queue_fake_sense(uas, tag, sense_code_OVERLAPPED_COMMANDS);
744 return;
745
746 bad_target:
747 usb_uas_queue_fake_sense(uas, tag, sense_code_LUN_NOT_SUPPORTED);
748 g_free(req);
749 }
750
751 static void usb_uas_task(UASDevice *uas, uas_iu *iu)
752 {
753 uint16_t tag = be16_to_cpu(iu->hdr.tag);
754 uint64_t lun64 = be64_to_cpu(iu->task.lun);
755 SCSIDevice *dev = usb_uas_get_dev(uas, lun64);
756 int lun = usb_uas_get_lun(lun64);
757 UASRequest *req;
758 uint16_t task_tag;
759
760 if (uas_using_streams(uas) && tag > UAS_MAX_STREAMS) {
761 goto invalid_tag;
762 }
763 req = usb_uas_find_request(uas, be16_to_cpu(iu->hdr.tag));
764 if (req) {
765 goto overlapped_tag;
766 }
767 if (dev == NULL) {
768 goto incorrect_lun;
769 }
770
771 switch (iu->task.function) {
772 case UAS_TMF_ABORT_TASK:
773 task_tag = be16_to_cpu(iu->task.task_tag);
774 trace_usb_uas_tmf_abort_task(uas->dev.addr, tag, task_tag);
775 req = usb_uas_find_request(uas, task_tag);
776 if (req && req->dev == dev) {
777 scsi_req_cancel(req->req);
778 }
779 usb_uas_queue_response(uas, tag, UAS_RC_TMF_COMPLETE);
780 break;
781
782 case UAS_TMF_LOGICAL_UNIT_RESET:
783 trace_usb_uas_tmf_logical_unit_reset(uas->dev.addr, tag, lun);
784 qdev_reset_all(&dev->qdev);
785 usb_uas_queue_response(uas, tag, UAS_RC_TMF_COMPLETE);
786 break;
787
788 default:
789 trace_usb_uas_tmf_unsupported(uas->dev.addr, tag, iu->task.function);
790 usb_uas_queue_response(uas, tag, UAS_RC_TMF_NOT_SUPPORTED);
791 break;
792 }
793 return;
794
795 invalid_tag:
796 usb_uas_queue_response(uas, tag, UAS_RC_INVALID_INFO_UNIT);
797 return;
798
799 overlapped_tag:
800 usb_uas_queue_response(uas, req->tag, UAS_RC_OVERLAPPED_TAG);
801 return;
802
803 incorrect_lun:
804 usb_uas_queue_response(uas, tag, UAS_RC_INCORRECT_LUN);
805 }
806
807 static void usb_uas_handle_data(USBDevice *dev, USBPacket *p)
808 {
809 UASDevice *uas = USB_UAS(dev);
810 uas_iu iu;
811 UASStatus *st;
812 UASRequest *req;
813 int length;
814
815 switch (p->ep->nr) {
816 case UAS_PIPE_ID_COMMAND:
817 length = MIN(sizeof(iu), p->iov.size);
818 usb_packet_copy(p, &iu, length);
819 switch (iu.hdr.id) {
820 case UAS_UI_COMMAND:
821 usb_uas_command(uas, &iu);
822 break;
823 case UAS_UI_TASK_MGMT:
824 usb_uas_task(uas, &iu);
825 break;
826 default:
827 error_report("%s: unknown command iu: id 0x%x",
828 __func__, iu.hdr.id);
829 p->status = USB_RET_STALL;
830 break;
831 }
832 break;
833 case UAS_PIPE_ID_STATUS:
834 if (p->stream) {
835 QTAILQ_FOREACH(st, &uas->results, next) {
836 if (st->stream == p->stream) {
837 break;
838 }
839 }
840 if (st == NULL) {
841 assert(uas->status3[p->stream] == NULL);
842 uas->status3[p->stream] = p;
843 p->status = USB_RET_ASYNC;
844 break;
845 }
846 } else {
847 st = QTAILQ_FIRST(&uas->results);
848 if (st == NULL) {
849 assert(uas->status2 == NULL);
850 uas->status2 = p;
851 p->status = USB_RET_ASYNC;
852 break;
853 }
854 }
855 usb_packet_copy(p, &st->status, st->length);
856 QTAILQ_REMOVE(&uas->results, st, next);
857 g_free(st);
858 break;
859 case UAS_PIPE_ID_DATA_IN:
860 case UAS_PIPE_ID_DATA_OUT:
861 if (p->stream) {
862 req = usb_uas_find_request(uas, p->stream);
863 } else {
864 req = (p->ep->nr == UAS_PIPE_ID_DATA_IN)
865 ? uas->datain2 : uas->dataout2;
866 }
867 if (req == NULL) {
868 if (p->stream) {
869 assert(uas->data3[p->stream] == NULL);
870 uas->data3[p->stream] = p;
871 p->status = USB_RET_ASYNC;
872 break;
873 } else {
874 error_report("%s: no inflight request", __func__);
875 p->status = USB_RET_STALL;
876 break;
877 }
878 }
879 scsi_req_ref(req->req);
880 req->data = p;
881 usb_uas_copy_data(req);
882 if (p->actual_length == p->iov.size || req->complete) {
883 req->data = NULL;
884 } else {
885 req->data_async = true;
886 p->status = USB_RET_ASYNC;
887 }
888 scsi_req_unref(req->req);
889 usb_uas_start_next_transfer(uas);
890 break;
891 default:
892 error_report("%s: invalid endpoint %d", __func__, p->ep->nr);
893 p->status = USB_RET_STALL;
894 break;
895 }
896 }
897
898 static void usb_uas_unrealize(USBDevice *dev)
899 {
900 UASDevice *uas = USB_UAS(dev);
901
902 qemu_bh_delete(uas->status_bh);
903 }
904
905 static void usb_uas_realize(USBDevice *dev, Error **errp)
906 {
907 UASDevice *uas = USB_UAS(dev);
908 DeviceState *d = DEVICE(dev);
909
910 usb_desc_create_serial(dev);
911 usb_desc_init(dev);
912 if (d->hotplugged) {
913 uas->dev.auto_attach = 0;
914 }
915
916 QTAILQ_INIT(&uas->results);
917 QTAILQ_INIT(&uas->requests);
918 uas->status_bh = qemu_bh_new(usb_uas_send_status_bh, uas);
919
920 scsi_bus_new(&uas->bus, sizeof(uas->bus), DEVICE(dev),
921 &usb_uas_scsi_info, NULL);
922 }
923
924 static const VMStateDescription vmstate_usb_uas = {
925 .name = "usb-uas",
926 .unmigratable = 1,
927 .fields = (VMStateField[]) {
928 VMSTATE_USB_DEVICE(dev, UASDevice),
929 VMSTATE_END_OF_LIST()
930 }
931 };
932
933 static Property uas_properties[] = {
934 DEFINE_PROP_UINT32("log-scsi-req", UASDevice, requestlog, 0),
935 DEFINE_PROP_END_OF_LIST(),
936 };
937
938 static void usb_uas_class_initfn(ObjectClass *klass, void *data)
939 {
940 DeviceClass *dc = DEVICE_CLASS(klass);
941 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
942
943 uc->realize = usb_uas_realize;
944 uc->product_desc = desc_strings[STR_PRODUCT];
945 uc->usb_desc = &desc;
946 uc->cancel_packet = usb_uas_cancel_io;
947 uc->handle_attach = usb_desc_attach;
948 uc->handle_reset = usb_uas_handle_reset;
949 uc->handle_control = usb_uas_handle_control;
950 uc->handle_data = usb_uas_handle_data;
951 uc->unrealize = usb_uas_unrealize;
952 uc->attached_settable = true;
953 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
954 dc->fw_name = "storage";
955 dc->vmsd = &vmstate_usb_uas;
956 device_class_set_props(dc, uas_properties);
957 }
958
959 static const TypeInfo uas_info = {
960 .name = TYPE_USB_UAS,
961 .parent = TYPE_USB_DEVICE,
962 .instance_size = sizeof(UASDevice),
963 .class_init = usb_uas_class_initfn,
964 };
965
966 static void usb_uas_register_types(void)
967 {
968 type_register_static(&uas_info);
969 }
970
971 type_init(usb_uas_register_types)
Mirror of https://git.qemu.org/git/qemu.git