1 /* Target based USB-Gadget
3 * UAS protocol handling, target callbacks, configfs handling,
4 * BBB (USB Mass Storage Class Bulk-Only (BBB) and Transport protocol handling.
6 * Author: Sebastian Andrzej Siewior <bigeasy at linutronix dot de>
7 * License: GPLv2 as published by FSF.
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/types.h>
12 #include <linux/string.h>
13 #include <linux/configfs.h>
14 #include <linux/ctype.h>
15 #include <linux/usb/ch9.h>
16 #include <linux/usb/composite.h>
17 #include <linux/usb/gadget.h>
18 #include <linux/usb/storage.h>
19 #include <scsi/scsi.h>
20 #include <scsi/scsi_tcq.h>
21 #include <target/target_core_base.h>
22 #include <target/target_core_fabric.h>
23 #include <target/target_core_fabric_configfs.h>
24 #include <target/target_core_configfs.h>
25 #include <target/configfs_macros.h>
26 #include <asm/unaligned.h>
28 #include "usbstring.c"
29 #include "epautoconf.c"
31 #include "composite.c"
33 #include "tcm_usb_gadget.h"
35 static struct target_fabric_configfs
*usbg_fabric_configfs
;
37 static inline struct f_uas
*to_f_uas(struct usb_function
*f
)
39 return container_of(f
, struct f_uas
, function
);
42 static void usbg_cmd_release(struct kref
*);
44 static inline void usbg_cleanup_cmd(struct usbg_cmd
*cmd
)
46 kref_put(&cmd
->ref
, usbg_cmd_release
);
49 /* Start bot.c code */
51 static int bot_enqueue_cmd_cbw(struct f_uas
*fu
)
55 if (fu
->flags
& USBG_BOT_CMD_PEND
)
58 ret
= usb_ep_queue(fu
->ep_out
, fu
->cmd
.req
, GFP_ATOMIC
);
60 fu
->flags
|= USBG_BOT_CMD_PEND
;
64 static void bot_status_complete(struct usb_ep
*ep
, struct usb_request
*req
)
66 struct usbg_cmd
*cmd
= req
->context
;
67 struct f_uas
*fu
= cmd
->fu
;
69 usbg_cleanup_cmd(cmd
);
70 if (req
->status
< 0) {
71 pr_err("ERR %s(%d)\n", __func__
, __LINE__
);
75 /* CSW completed, wait for next CBW */
76 bot_enqueue_cmd_cbw(fu
);
79 static void bot_enqueue_sense_code(struct f_uas
*fu
, struct usbg_cmd
*cmd
)
81 struct bulk_cs_wrap
*csw
= &fu
->bot_status
.csw
;
84 unsigned int csw_stat
;
86 csw_stat
= cmd
->csw_code
;
89 * We can't send SENSE as a response. So we take ASC & ASCQ from our
90 * sense buffer and queue it and hope the host sends a REQUEST_SENSE
91 * command where it learns why we failed.
93 sense
= cmd
->sense_iu
.sense
;
95 csw
->Tag
= cmd
->bot_tag
;
96 csw
->Status
= csw_stat
;
97 fu
->bot_status
.req
->context
= cmd
;
98 ret
= usb_ep_queue(fu
->ep_in
, fu
->bot_status
.req
, GFP_ATOMIC
);
100 pr_err("%s(%d) ERR: %d\n", __func__
, __LINE__
, ret
);
103 static void bot_err_compl(struct usb_ep
*ep
, struct usb_request
*req
)
105 struct usbg_cmd
*cmd
= req
->context
;
106 struct f_uas
*fu
= cmd
->fu
;
109 pr_err("ERR %s(%d)\n", __func__
, __LINE__
);
112 if (cmd
->data_len
> ep
->maxpacket
) {
113 req
->length
= ep
->maxpacket
;
114 cmd
->data_len
-= ep
->maxpacket
;
116 req
->length
= cmd
->data_len
;
120 usb_ep_queue(ep
, req
, GFP_ATOMIC
);
123 bot_enqueue_sense_code(fu
, cmd
);
126 static void bot_send_bad_status(struct usbg_cmd
*cmd
)
128 struct f_uas
*fu
= cmd
->fu
;
129 struct bulk_cs_wrap
*csw
= &fu
->bot_status
.csw
;
130 struct usb_request
*req
;
133 csw
->Residue
= cpu_to_le32(cmd
->data_len
);
138 req
= fu
->bot_req_in
;
141 req
= fu
->bot_req_out
;
144 if (cmd
->data_len
> fu
->ep_in
->maxpacket
) {
145 req
->length
= ep
->maxpacket
;
146 cmd
->data_len
-= ep
->maxpacket
;
148 req
->length
= cmd
->data_len
;
151 req
->complete
= bot_err_compl
;
153 req
->buf
= fu
->cmd
.buf
;
154 usb_ep_queue(ep
, req
, GFP_KERNEL
);
156 bot_enqueue_sense_code(fu
, cmd
);
160 static int bot_send_status(struct usbg_cmd
*cmd
, bool moved_data
)
162 struct f_uas
*fu
= cmd
->fu
;
163 struct bulk_cs_wrap
*csw
= &fu
->bot_status
.csw
;
166 if (cmd
->se_cmd
.scsi_status
== SAM_STAT_GOOD
) {
167 if (!moved_data
&& cmd
->data_len
) {
169 * the host wants to move data, we don't. Fill / empty
170 * the pipe and then send the csw with reside set.
172 cmd
->csw_code
= US_BULK_STAT_OK
;
173 bot_send_bad_status(cmd
);
177 csw
->Tag
= cmd
->bot_tag
;
178 csw
->Residue
= cpu_to_le32(0);
179 csw
->Status
= US_BULK_STAT_OK
;
180 fu
->bot_status
.req
->context
= cmd
;
182 ret
= usb_ep_queue(fu
->ep_in
, fu
->bot_status
.req
, GFP_KERNEL
);
184 pr_err("%s(%d) ERR: %d\n", __func__
, __LINE__
, ret
);
186 cmd
->csw_code
= US_BULK_STAT_FAIL
;
187 bot_send_bad_status(cmd
);
193 * Called after command (no data transfer) or after the write (to device)
194 * operation is completed
196 static int bot_send_status_response(struct usbg_cmd
*cmd
)
198 bool moved_data
= false;
202 return bot_send_status(cmd
, moved_data
);
205 /* Read request completed, now we have to send the CSW */
206 static void bot_read_compl(struct usb_ep
*ep
, struct usb_request
*req
)
208 struct usbg_cmd
*cmd
= req
->context
;
211 pr_err("ERR %s(%d)\n", __func__
, __LINE__
);
213 bot_send_status(cmd
, true);
216 static int bot_send_read_response(struct usbg_cmd
*cmd
)
218 struct f_uas
*fu
= cmd
->fu
;
219 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
220 struct usb_gadget
*gadget
= fuas_to_gadget(fu
);
223 if (!cmd
->data_len
) {
224 cmd
->csw_code
= US_BULK_STAT_PHASE
;
225 bot_send_bad_status(cmd
);
229 if (!gadget
->sg_supported
) {
230 cmd
->data_buf
= kmalloc(se_cmd
->data_length
, GFP_ATOMIC
);
234 sg_copy_to_buffer(se_cmd
->t_data_sg
,
235 se_cmd
->t_data_nents
,
237 se_cmd
->data_length
);
239 fu
->bot_req_in
->buf
= cmd
->data_buf
;
241 fu
->bot_req_in
->buf
= NULL
;
242 fu
->bot_req_in
->num_sgs
= se_cmd
->t_data_nents
;
243 fu
->bot_req_in
->sg
= se_cmd
->t_data_sg
;
246 fu
->bot_req_in
->complete
= bot_read_compl
;
247 fu
->bot_req_in
->length
= se_cmd
->data_length
;
248 fu
->bot_req_in
->context
= cmd
;
249 ret
= usb_ep_queue(fu
->ep_in
, fu
->bot_req_in
, GFP_ATOMIC
);
251 pr_err("%s(%d)\n", __func__
, __LINE__
);
255 static void usbg_data_write_cmpl(struct usb_ep
*, struct usb_request
*);
256 static int usbg_prepare_w_request(struct usbg_cmd
*, struct usb_request
*);
258 static int bot_send_write_request(struct usbg_cmd
*cmd
)
260 struct f_uas
*fu
= cmd
->fu
;
261 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
262 struct usb_gadget
*gadget
= fuas_to_gadget(fu
);
265 init_completion(&cmd
->write_complete
);
268 if (!cmd
->data_len
) {
269 cmd
->csw_code
= US_BULK_STAT_PHASE
;
273 if (!gadget
->sg_supported
) {
274 cmd
->data_buf
= kmalloc(se_cmd
->data_length
, GFP_KERNEL
);
278 fu
->bot_req_out
->buf
= cmd
->data_buf
;
280 fu
->bot_req_out
->buf
= NULL
;
281 fu
->bot_req_out
->num_sgs
= se_cmd
->t_data_nents
;
282 fu
->bot_req_out
->sg
= se_cmd
->t_data_sg
;
285 fu
->bot_req_out
->complete
= usbg_data_write_cmpl
;
286 fu
->bot_req_out
->length
= se_cmd
->data_length
;
287 fu
->bot_req_out
->context
= cmd
;
289 ret
= usbg_prepare_w_request(cmd
, fu
->bot_req_out
);
292 ret
= usb_ep_queue(fu
->ep_out
, fu
->bot_req_out
, GFP_KERNEL
);
294 pr_err("%s(%d)\n", __func__
, __LINE__
);
296 wait_for_completion(&cmd
->write_complete
);
297 target_execute_cmd(se_cmd
);
302 static int bot_submit_command(struct f_uas
*, void *, unsigned int);
304 static void bot_cmd_complete(struct usb_ep
*ep
, struct usb_request
*req
)
306 struct f_uas
*fu
= req
->context
;
309 fu
->flags
&= ~USBG_BOT_CMD_PEND
;
314 ret
= bot_submit_command(fu
, req
->buf
, req
->actual
);
316 pr_err("%s(%d): %d\n", __func__
, __LINE__
, ret
);
319 static int bot_prepare_reqs(struct f_uas
*fu
)
323 fu
->bot_req_in
= usb_ep_alloc_request(fu
->ep_in
, GFP_KERNEL
);
327 fu
->bot_req_out
= usb_ep_alloc_request(fu
->ep_out
, GFP_KERNEL
);
328 if (!fu
->bot_req_out
)
331 fu
->cmd
.req
= usb_ep_alloc_request(fu
->ep_out
, GFP_KERNEL
);
335 fu
->bot_status
.req
= usb_ep_alloc_request(fu
->ep_in
, GFP_KERNEL
);
336 if (!fu
->bot_status
.req
)
339 fu
->bot_status
.req
->buf
= &fu
->bot_status
.csw
;
340 fu
->bot_status
.req
->length
= US_BULK_CS_WRAP_LEN
;
341 fu
->bot_status
.req
->complete
= bot_status_complete
;
342 fu
->bot_status
.csw
.Signature
= cpu_to_le32(US_BULK_CS_SIGN
);
344 fu
->cmd
.buf
= kmalloc(fu
->ep_out
->maxpacket
, GFP_KERNEL
);
348 fu
->cmd
.req
->complete
= bot_cmd_complete
;
349 fu
->cmd
.req
->buf
= fu
->cmd
.buf
;
350 fu
->cmd
.req
->length
= fu
->ep_out
->maxpacket
;
351 fu
->cmd
.req
->context
= fu
;
353 ret
= bot_enqueue_cmd_cbw(fu
);
361 usb_ep_free_request(fu
->ep_in
, fu
->bot_status
.req
);
363 usb_ep_free_request(fu
->ep_out
, fu
->cmd
.req
);
366 usb_ep_free_request(fu
->ep_out
, fu
->bot_req_out
);
367 fu
->bot_req_out
= NULL
;
369 usb_ep_free_request(fu
->ep_in
, fu
->bot_req_in
);
370 fu
->bot_req_in
= NULL
;
372 pr_err("BOT: endpoint setup failed\n");
376 void bot_cleanup_old_alt(struct f_uas
*fu
)
378 if (!(fu
->flags
& USBG_ENABLED
))
381 usb_ep_disable(fu
->ep_in
);
382 usb_ep_disable(fu
->ep_out
);
387 usb_ep_free_request(fu
->ep_in
, fu
->bot_req_in
);
388 usb_ep_free_request(fu
->ep_out
, fu
->bot_req_out
);
389 usb_ep_free_request(fu
->ep_out
, fu
->cmd
.req
);
390 usb_ep_free_request(fu
->ep_out
, fu
->bot_status
.req
);
394 fu
->bot_req_in
= NULL
;
395 fu
->bot_req_out
= NULL
;
397 fu
->bot_status
.req
= NULL
;
401 static void bot_set_alt(struct f_uas
*fu
)
403 struct usb_function
*f
= &fu
->function
;
404 struct usb_gadget
*gadget
= f
->config
->cdev
->gadget
;
407 fu
->flags
= USBG_IS_BOT
;
409 config_ep_by_speed(gadget
, f
, fu
->ep_in
);
410 ret
= usb_ep_enable(fu
->ep_in
);
414 config_ep_by_speed(gadget
, f
, fu
->ep_out
);
415 ret
= usb_ep_enable(fu
->ep_out
);
419 ret
= bot_prepare_reqs(fu
);
422 fu
->flags
|= USBG_ENABLED
;
423 pr_info("Using the BOT protocol\n");
426 usb_ep_disable(fu
->ep_out
);
428 usb_ep_disable(fu
->ep_in
);
430 fu
->flags
= USBG_IS_BOT
;
433 static int usbg_bot_setup(struct usb_function
*f
,
434 const struct usb_ctrlrequest
*ctrl
)
436 struct f_uas
*fu
= to_f_uas(f
);
437 struct usb_composite_dev
*cdev
= f
->config
->cdev
;
438 u16 w_value
= le16_to_cpu(ctrl
->wValue
);
439 u16 w_length
= le16_to_cpu(ctrl
->wLength
);
443 switch (ctrl
->bRequest
) {
444 case US_BULK_GET_MAX_LUN
:
445 if (ctrl
->bRequestType
!= (USB_DIR_IN
| USB_TYPE_CLASS
|
446 USB_RECIP_INTERFACE
))
453 luns
= atomic_read(&fu
->tpg
->tpg_port_count
);
455 pr_err("No LUNs configured?\n");
459 * If 4 LUNs are present we return 3 i.e. LUN 0..3 can be
460 * accessed. The upper limit is 0xf
464 pr_info_once("Limiting the number of luns to 16\n");
467 ret_lun
= cdev
->req
->buf
;
469 cdev
->req
->length
= 1;
470 return usb_ep_queue(cdev
->gadget
->ep0
, cdev
->req
, GFP_ATOMIC
);
473 case US_BULK_RESET_REQUEST
:
474 /* XXX maybe we should remove previous requests for IN + OUT */
475 bot_enqueue_cmd_cbw(fu
);
482 /* Start uas.c code */
484 static void uasp_cleanup_one_stream(struct f_uas
*fu
, struct uas_stream
*stream
)
486 /* We have either all three allocated or none */
490 usb_ep_free_request(fu
->ep_in
, stream
->req_in
);
491 usb_ep_free_request(fu
->ep_out
, stream
->req_out
);
492 usb_ep_free_request(fu
->ep_status
, stream
->req_status
);
494 stream
->req_in
= NULL
;
495 stream
->req_out
= NULL
;
496 stream
->req_status
= NULL
;
499 static void uasp_free_cmdreq(struct f_uas
*fu
)
501 usb_ep_free_request(fu
->ep_cmd
, fu
->cmd
.req
);
507 static void uasp_cleanup_old_alt(struct f_uas
*fu
)
511 if (!(fu
->flags
& USBG_ENABLED
))
514 usb_ep_disable(fu
->ep_in
);
515 usb_ep_disable(fu
->ep_out
);
516 usb_ep_disable(fu
->ep_status
);
517 usb_ep_disable(fu
->ep_cmd
);
519 for (i
= 0; i
< UASP_SS_EP_COMP_NUM_STREAMS
; i
++)
520 uasp_cleanup_one_stream(fu
, &fu
->stream
[i
]);
521 uasp_free_cmdreq(fu
);
524 static void uasp_status_data_cmpl(struct usb_ep
*ep
, struct usb_request
*req
);
526 static int uasp_prepare_r_request(struct usbg_cmd
*cmd
)
528 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
529 struct f_uas
*fu
= cmd
->fu
;
530 struct usb_gadget
*gadget
= fuas_to_gadget(fu
);
531 struct uas_stream
*stream
= cmd
->stream
;
533 if (!gadget
->sg_supported
) {
534 cmd
->data_buf
= kmalloc(se_cmd
->data_length
, GFP_ATOMIC
);
538 sg_copy_to_buffer(se_cmd
->t_data_sg
,
539 se_cmd
->t_data_nents
,
541 se_cmd
->data_length
);
543 stream
->req_in
->buf
= cmd
->data_buf
;
545 stream
->req_in
->buf
= NULL
;
546 stream
->req_in
->num_sgs
= se_cmd
->t_data_nents
;
547 stream
->req_in
->sg
= se_cmd
->t_data_sg
;
550 stream
->req_in
->complete
= uasp_status_data_cmpl
;
551 stream
->req_in
->length
= se_cmd
->data_length
;
552 stream
->req_in
->context
= cmd
;
554 cmd
->state
= UASP_SEND_STATUS
;
558 static void uasp_prepare_status(struct usbg_cmd
*cmd
)
560 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
561 struct sense_iu
*iu
= &cmd
->sense_iu
;
562 struct uas_stream
*stream
= cmd
->stream
;
564 cmd
->state
= UASP_QUEUE_COMMAND
;
565 iu
->iu_id
= IU_ID_STATUS
;
566 iu
->tag
= cpu_to_be16(cmd
->tag
);
569 * iu->status_qual = cpu_to_be16(STATUS QUALIFIER SAM-4. Where R U?);
571 iu
->len
= cpu_to_be16(se_cmd
->scsi_sense_length
);
572 iu
->status
= se_cmd
->scsi_status
;
573 stream
->req_status
->context
= cmd
;
574 stream
->req_status
->length
= se_cmd
->scsi_sense_length
+ 16;
575 stream
->req_status
->buf
= iu
;
576 stream
->req_status
->complete
= uasp_status_data_cmpl
;
579 static void uasp_status_data_cmpl(struct usb_ep
*ep
, struct usb_request
*req
)
581 struct usbg_cmd
*cmd
= req
->context
;
582 struct uas_stream
*stream
= cmd
->stream
;
583 struct f_uas
*fu
= cmd
->fu
;
589 switch (cmd
->state
) {
591 ret
= uasp_prepare_r_request(cmd
);
594 ret
= usb_ep_queue(fu
->ep_in
, stream
->req_in
, GFP_ATOMIC
);
596 pr_err("%s(%d) => %d\n", __func__
, __LINE__
, ret
);
599 case UASP_RECEIVE_DATA
:
600 ret
= usbg_prepare_w_request(cmd
, stream
->req_out
);
603 ret
= usb_ep_queue(fu
->ep_out
, stream
->req_out
, GFP_ATOMIC
);
605 pr_err("%s(%d) => %d\n", __func__
, __LINE__
, ret
);
608 case UASP_SEND_STATUS
:
609 uasp_prepare_status(cmd
);
610 ret
= usb_ep_queue(fu
->ep_status
, stream
->req_status
,
613 pr_err("%s(%d) => %d\n", __func__
, __LINE__
, ret
);
616 case UASP_QUEUE_COMMAND
:
617 usbg_cleanup_cmd(cmd
);
618 usb_ep_queue(fu
->ep_cmd
, fu
->cmd
.req
, GFP_ATOMIC
);
627 usbg_cleanup_cmd(cmd
);
630 static int uasp_send_status_response(struct usbg_cmd
*cmd
)
632 struct f_uas
*fu
= cmd
->fu
;
633 struct uas_stream
*stream
= cmd
->stream
;
634 struct sense_iu
*iu
= &cmd
->sense_iu
;
636 iu
->tag
= cpu_to_be16(cmd
->tag
);
637 stream
->req_status
->complete
= uasp_status_data_cmpl
;
638 stream
->req_status
->context
= cmd
;
640 uasp_prepare_status(cmd
);
641 return usb_ep_queue(fu
->ep_status
, stream
->req_status
, GFP_ATOMIC
);
644 static int uasp_send_read_response(struct usbg_cmd
*cmd
)
646 struct f_uas
*fu
= cmd
->fu
;
647 struct uas_stream
*stream
= cmd
->stream
;
648 struct sense_iu
*iu
= &cmd
->sense_iu
;
653 iu
->tag
= cpu_to_be16(cmd
->tag
);
654 if (fu
->flags
& USBG_USE_STREAMS
) {
656 ret
= uasp_prepare_r_request(cmd
);
659 ret
= usb_ep_queue(fu
->ep_in
, stream
->req_in
, GFP_ATOMIC
);
661 pr_err("%s(%d) => %d\n", __func__
, __LINE__
, ret
);
662 kfree(cmd
->data_buf
);
663 cmd
->data_buf
= NULL
;
668 iu
->iu_id
= IU_ID_READ_READY
;
669 iu
->tag
= cpu_to_be16(cmd
->tag
);
671 stream
->req_status
->complete
= uasp_status_data_cmpl
;
672 stream
->req_status
->context
= cmd
;
674 cmd
->state
= UASP_SEND_DATA
;
675 stream
->req_status
->buf
= iu
;
676 stream
->req_status
->length
= sizeof(struct iu
);
678 ret
= usb_ep_queue(fu
->ep_status
, stream
->req_status
,
681 pr_err("%s(%d) => %d\n", __func__
, __LINE__
, ret
);
687 static int uasp_send_write_request(struct usbg_cmd
*cmd
)
689 struct f_uas
*fu
= cmd
->fu
;
690 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
691 struct uas_stream
*stream
= cmd
->stream
;
692 struct sense_iu
*iu
= &cmd
->sense_iu
;
695 init_completion(&cmd
->write_complete
);
698 iu
->tag
= cpu_to_be16(cmd
->tag
);
700 if (fu
->flags
& USBG_USE_STREAMS
) {
702 ret
= usbg_prepare_w_request(cmd
, stream
->req_out
);
705 ret
= usb_ep_queue(fu
->ep_out
, stream
->req_out
, GFP_ATOMIC
);
707 pr_err("%s(%d)\n", __func__
, __LINE__
);
711 iu
->iu_id
= IU_ID_WRITE_READY
;
712 iu
->tag
= cpu_to_be16(cmd
->tag
);
714 stream
->req_status
->complete
= uasp_status_data_cmpl
;
715 stream
->req_status
->context
= cmd
;
717 cmd
->state
= UASP_RECEIVE_DATA
;
718 stream
->req_status
->buf
= iu
;
719 stream
->req_status
->length
= sizeof(struct iu
);
721 ret
= usb_ep_queue(fu
->ep_status
, stream
->req_status
,
724 pr_err("%s(%d)\n", __func__
, __LINE__
);
727 wait_for_completion(&cmd
->write_complete
);
728 target_execute_cmd(se_cmd
);
733 static int usbg_submit_command(struct f_uas
*, void *, unsigned int);
735 static void uasp_cmd_complete(struct usb_ep
*ep
, struct usb_request
*req
)
737 struct f_uas
*fu
= req
->context
;
743 ret
= usbg_submit_command(fu
, req
->buf
, req
->actual
);
745 * Once we tune for performance enqueue the command req here again so
746 * we can receive a second command while we processing this one. Pay
747 * attention to properly sync STAUS endpoint with DATA IN + OUT so you
752 usb_ep_queue(fu
->ep_cmd
, fu
->cmd
.req
, GFP_ATOMIC
);
755 static int uasp_alloc_stream_res(struct f_uas
*fu
, struct uas_stream
*stream
)
757 stream
->req_in
= usb_ep_alloc_request(fu
->ep_in
, GFP_KERNEL
);
761 stream
->req_out
= usb_ep_alloc_request(fu
->ep_out
, GFP_KERNEL
);
762 if (!stream
->req_out
)
765 stream
->req_status
= usb_ep_alloc_request(fu
->ep_status
, GFP_KERNEL
);
766 if (!stream
->req_status
)
771 usb_ep_free_request(fu
->ep_status
, stream
->req_status
);
772 stream
->req_status
= NULL
;
774 usb_ep_free_request(fu
->ep_out
, stream
->req_out
);
775 stream
->req_out
= NULL
;
780 static int uasp_alloc_cmd(struct f_uas
*fu
)
782 fu
->cmd
.req
= usb_ep_alloc_request(fu
->ep_cmd
, GFP_KERNEL
);
786 fu
->cmd
.buf
= kmalloc(fu
->ep_cmd
->maxpacket
, GFP_KERNEL
);
790 fu
->cmd
.req
->complete
= uasp_cmd_complete
;
791 fu
->cmd
.req
->buf
= fu
->cmd
.buf
;
792 fu
->cmd
.req
->length
= fu
->ep_cmd
->maxpacket
;
793 fu
->cmd
.req
->context
= fu
;
797 usb_ep_free_request(fu
->ep_cmd
, fu
->cmd
.req
);
802 static void uasp_setup_stream_res(struct f_uas
*fu
, int max_streams
)
806 for (i
= 0; i
< max_streams
; i
++) {
807 struct uas_stream
*s
= &fu
->stream
[i
];
809 s
->req_in
->stream_id
= i
+ 1;
810 s
->req_out
->stream_id
= i
+ 1;
811 s
->req_status
->stream_id
= i
+ 1;
815 static int uasp_prepare_reqs(struct f_uas
*fu
)
821 if (fu
->flags
& USBG_USE_STREAMS
)
822 max_streams
= UASP_SS_EP_COMP_NUM_STREAMS
;
826 for (i
= 0; i
< max_streams
; i
++) {
827 ret
= uasp_alloc_stream_res(fu
, &fu
->stream
[i
]);
832 ret
= uasp_alloc_cmd(fu
);
834 goto err_free_stream
;
835 uasp_setup_stream_res(fu
, max_streams
);
837 ret
= usb_ep_queue(fu
->ep_cmd
, fu
->cmd
.req
, GFP_ATOMIC
);
839 goto err_free_stream
;
844 uasp_free_cmdreq(fu
);
849 uasp_cleanup_one_stream(fu
, &fu
->stream
[i
- 1]);
853 pr_err("UASP: endpoint setup failed\n");
857 static void uasp_set_alt(struct f_uas
*fu
)
859 struct usb_function
*f
= &fu
->function
;
860 struct usb_gadget
*gadget
= f
->config
->cdev
->gadget
;
863 fu
->flags
= USBG_IS_UAS
;
865 if (gadget
->speed
== USB_SPEED_SUPER
)
866 fu
->flags
|= USBG_USE_STREAMS
;
868 config_ep_by_speed(gadget
, f
, fu
->ep_in
);
869 ret
= usb_ep_enable(fu
->ep_in
);
873 config_ep_by_speed(gadget
, f
, fu
->ep_out
);
874 ret
= usb_ep_enable(fu
->ep_out
);
878 config_ep_by_speed(gadget
, f
, fu
->ep_cmd
);
879 ret
= usb_ep_enable(fu
->ep_cmd
);
882 config_ep_by_speed(gadget
, f
, fu
->ep_status
);
883 ret
= usb_ep_enable(fu
->ep_status
);
887 ret
= uasp_prepare_reqs(fu
);
890 fu
->flags
|= USBG_ENABLED
;
892 pr_info("Using the UAS protocol\n");
895 usb_ep_disable(fu
->ep_status
);
897 usb_ep_disable(fu
->ep_cmd
);
899 usb_ep_disable(fu
->ep_out
);
901 usb_ep_disable(fu
->ep_in
);
906 static int get_cmd_dir(const unsigned char *cdb
)
918 case SERVICE_ACTION_IN
:
920 case PERSISTENT_RESERVE_IN
:
921 case SECURITY_PROTOCOL_IN
:
922 case ACCESS_CONTROL_IN
:
924 case READ_BLOCK_LIMITS
:
928 case READ_FORMAT_CAPACITIES
:
930 ret
= DMA_FROM_DEVICE
;
940 case WRITE_VERIFY_12
:
941 case PERSISTENT_RESERVE_OUT
:
942 case MAINTENANCE_OUT
:
943 case SECURITY_PROTOCOL_OUT
:
944 case ACCESS_CONTROL_OUT
:
947 case ALLOW_MEDIUM_REMOVAL
:
948 case TEST_UNIT_READY
:
949 case SYNCHRONIZE_CACHE
:
956 case WRITE_FILEMARKS
:
960 pr_warn("target: Unknown data direction for SCSI Opcode "
967 static void usbg_data_write_cmpl(struct usb_ep
*ep
, struct usb_request
*req
)
969 struct usbg_cmd
*cmd
= req
->context
;
970 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
972 if (req
->status
< 0) {
973 pr_err("%s() state %d transfer failed\n", __func__
, cmd
->state
);
977 if (req
->num_sgs
== 0) {
978 sg_copy_from_buffer(se_cmd
->t_data_sg
,
979 se_cmd
->t_data_nents
,
981 se_cmd
->data_length
);
984 complete(&cmd
->write_complete
);
988 usbg_cleanup_cmd(cmd
);
991 static int usbg_prepare_w_request(struct usbg_cmd
*cmd
, struct usb_request
*req
)
993 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
994 struct f_uas
*fu
= cmd
->fu
;
995 struct usb_gadget
*gadget
= fuas_to_gadget(fu
);
997 if (!gadget
->sg_supported
) {
998 cmd
->data_buf
= kmalloc(se_cmd
->data_length
, GFP_ATOMIC
);
1002 req
->buf
= cmd
->data_buf
;
1005 req
->num_sgs
= se_cmd
->t_data_nents
;
1006 req
->sg
= se_cmd
->t_data_sg
;
1009 req
->complete
= usbg_data_write_cmpl
;
1010 req
->length
= se_cmd
->data_length
;
1015 static int usbg_send_status_response(struct se_cmd
*se_cmd
)
1017 struct usbg_cmd
*cmd
= container_of(se_cmd
, struct usbg_cmd
,
1019 struct f_uas
*fu
= cmd
->fu
;
1021 if (fu
->flags
& USBG_IS_BOT
)
1022 return bot_send_status_response(cmd
);
1024 return uasp_send_status_response(cmd
);
1027 static int usbg_send_write_request(struct se_cmd
*se_cmd
)
1029 struct usbg_cmd
*cmd
= container_of(se_cmd
, struct usbg_cmd
,
1031 struct f_uas
*fu
= cmd
->fu
;
1033 if (fu
->flags
& USBG_IS_BOT
)
1034 return bot_send_write_request(cmd
);
1036 return uasp_send_write_request(cmd
);
1039 static int usbg_send_read_response(struct se_cmd
*se_cmd
)
1041 struct usbg_cmd
*cmd
= container_of(se_cmd
, struct usbg_cmd
,
1043 struct f_uas
*fu
= cmd
->fu
;
1045 if (fu
->flags
& USBG_IS_BOT
)
1046 return bot_send_read_response(cmd
);
1048 return uasp_send_read_response(cmd
);
1051 static void usbg_cmd_work(struct work_struct
*work
)
1053 struct usbg_cmd
*cmd
= container_of(work
, struct usbg_cmd
, work
);
1054 struct se_cmd
*se_cmd
;
1055 struct tcm_usbg_nexus
*tv_nexus
;
1056 struct usbg_tpg
*tpg
;
1059 se_cmd
= &cmd
->se_cmd
;
1061 tv_nexus
= tpg
->tpg_nexus
;
1062 dir
= get_cmd_dir(cmd
->cmd_buf
);
1064 transport_init_se_cmd(se_cmd
,
1065 tv_nexus
->tvn_se_sess
->se_tpg
->se_tpg_tfo
,
1066 tv_nexus
->tvn_se_sess
, cmd
->data_len
, DMA_NONE
,
1067 cmd
->prio_attr
, cmd
->sense_iu
.sense
);
1069 transport_send_check_condition_and_sense(se_cmd
,
1070 TCM_UNSUPPORTED_SCSI_OPCODE
, 1);
1071 usbg_cleanup_cmd(cmd
);
1075 target_submit_cmd(se_cmd
, tv_nexus
->tvn_se_sess
,
1076 cmd
->cmd_buf
, cmd
->sense_iu
.sense
, cmd
->unpacked_lun
,
1077 0, cmd
->prio_attr
, dir
, TARGET_SCF_UNKNOWN_SIZE
);
1080 static int usbg_submit_command(struct f_uas
*fu
,
1081 void *cmdbuf
, unsigned int len
)
1083 struct command_iu
*cmd_iu
= cmdbuf
;
1084 struct usbg_cmd
*cmd
;
1085 struct usbg_tpg
*tpg
;
1086 struct se_cmd
*se_cmd
;
1087 struct tcm_usbg_nexus
*tv_nexus
;
1091 if (cmd_iu
->iu_id
!= IU_ID_COMMAND
) {
1092 pr_err("Unsupported type %d\n", cmd_iu
->iu_id
);
1096 cmd
= kzalloc(sizeof *cmd
, GFP_ATOMIC
);
1102 /* XXX until I figure out why I can't free in on complete */
1103 kref_init(&cmd
->ref
);
1104 kref_get(&cmd
->ref
);
1107 cmd_len
= (cmd_iu
->len
& ~0x3) + 16;
1108 if (cmd_len
> USBG_MAX_CMD
)
1111 memcpy(cmd
->cmd_buf
, cmd_iu
->cdb
, cmd_len
);
1113 cmd
->tag
= be16_to_cpup(&cmd_iu
->tag
);
1114 if (fu
->flags
& USBG_USE_STREAMS
) {
1115 if (cmd
->tag
> UASP_SS_EP_COMP_NUM_STREAMS
)
1118 cmd
->stream
= &fu
->stream
[0];
1120 cmd
->stream
= &fu
->stream
[cmd
->tag
- 1];
1122 cmd
->stream
= &fu
->stream
[0];
1125 tv_nexus
= tpg
->tpg_nexus
;
1127 pr_err("Missing nexus, ignoring command\n");
1131 switch (cmd_iu
->prio_attr
& 0x7) {
1133 cmd
->prio_attr
= MSG_HEAD_TAG
;
1135 case UAS_ORDERED_TAG
:
1136 cmd
->prio_attr
= MSG_ORDERED_TAG
;
1139 cmd
->prio_attr
= MSG_ACA_TAG
;
1142 pr_debug_once("Unsupported prio_attr: %02x.\n",
1144 case UAS_SIMPLE_TAG
:
1145 cmd
->prio_attr
= MSG_SIMPLE_TAG
;
1149 se_cmd
= &cmd
->se_cmd
;
1150 cmd
->unpacked_lun
= scsilun_to_int(&cmd_iu
->lun
);
1152 INIT_WORK(&cmd
->work
, usbg_cmd_work
);
1153 ret
= queue_work(tpg
->workqueue
, &cmd
->work
);
1163 static void bot_cmd_work(struct work_struct
*work
)
1165 struct usbg_cmd
*cmd
= container_of(work
, struct usbg_cmd
, work
);
1166 struct se_cmd
*se_cmd
;
1167 struct tcm_usbg_nexus
*tv_nexus
;
1168 struct usbg_tpg
*tpg
;
1171 se_cmd
= &cmd
->se_cmd
;
1173 tv_nexus
= tpg
->tpg_nexus
;
1174 dir
= get_cmd_dir(cmd
->cmd_buf
);
1176 transport_init_se_cmd(se_cmd
,
1177 tv_nexus
->tvn_se_sess
->se_tpg
->se_tpg_tfo
,
1178 tv_nexus
->tvn_se_sess
, cmd
->data_len
, DMA_NONE
,
1179 cmd
->prio_attr
, cmd
->sense_iu
.sense
);
1181 transport_send_check_condition_and_sense(se_cmd
,
1182 TCM_UNSUPPORTED_SCSI_OPCODE
, 1);
1183 usbg_cleanup_cmd(cmd
);
1187 target_submit_cmd(se_cmd
, tv_nexus
->tvn_se_sess
,
1188 cmd
->cmd_buf
, cmd
->sense_iu
.sense
, cmd
->unpacked_lun
,
1189 cmd
->data_len
, cmd
->prio_attr
, dir
, 0);
1192 static int bot_submit_command(struct f_uas
*fu
,
1193 void *cmdbuf
, unsigned int len
)
1195 struct bulk_cb_wrap
*cbw
= cmdbuf
;
1196 struct usbg_cmd
*cmd
;
1197 struct usbg_tpg
*tpg
;
1198 struct se_cmd
*se_cmd
;
1199 struct tcm_usbg_nexus
*tv_nexus
;
1203 if (cbw
->Signature
!= cpu_to_le32(US_BULK_CB_SIGN
)) {
1204 pr_err("Wrong signature on CBW\n");
1208 pr_err("Wrong length for CBW\n");
1212 cmd_len
= cbw
->Length
;
1213 if (cmd_len
< 1 || cmd_len
> 16)
1216 cmd
= kzalloc(sizeof *cmd
, GFP_ATOMIC
);
1222 /* XXX until I figure out why I can't free in on complete */
1223 kref_init(&cmd
->ref
);
1224 kref_get(&cmd
->ref
);
1228 memcpy(cmd
->cmd_buf
, cbw
->CDB
, cmd_len
);
1230 cmd
->bot_tag
= cbw
->Tag
;
1232 tv_nexus
= tpg
->tpg_nexus
;
1234 pr_err("Missing nexus, ignoring command\n");
1238 cmd
->prio_attr
= MSG_SIMPLE_TAG
;
1239 se_cmd
= &cmd
->se_cmd
;
1240 cmd
->unpacked_lun
= cbw
->Lun
;
1241 cmd
->is_read
= cbw
->Flags
& US_BULK_FLAG_IN
? 1 : 0;
1242 cmd
->data_len
= le32_to_cpu(cbw
->DataTransferLength
);
1244 INIT_WORK(&cmd
->work
, bot_cmd_work
);
1245 ret
= queue_work(tpg
->workqueue
, &cmd
->work
);
1255 /* Start fabric.c code */
1257 static int usbg_check_true(struct se_portal_group
*se_tpg
)
1262 static int usbg_check_false(struct se_portal_group
*se_tpg
)
1267 static char *usbg_get_fabric_name(void)
1269 return "usb_gadget";
1272 static u8
usbg_get_fabric_proto_ident(struct se_portal_group
*se_tpg
)
1274 struct usbg_tpg
*tpg
= container_of(se_tpg
,
1275 struct usbg_tpg
, se_tpg
);
1276 struct usbg_tport
*tport
= tpg
->tport
;
1279 switch (tport
->tport_proto_id
) {
1280 case SCSI_PROTOCOL_SAS
:
1282 proto_id
= sas_get_fabric_proto_ident(se_tpg
);
1289 static char *usbg_get_fabric_wwn(struct se_portal_group
*se_tpg
)
1291 struct usbg_tpg
*tpg
= container_of(se_tpg
,
1292 struct usbg_tpg
, se_tpg
);
1293 struct usbg_tport
*tport
= tpg
->tport
;
1295 return &tport
->tport_name
[0];
1298 static u16
usbg_get_tag(struct se_portal_group
*se_tpg
)
1300 struct usbg_tpg
*tpg
= container_of(se_tpg
,
1301 struct usbg_tpg
, se_tpg
);
1302 return tpg
->tport_tpgt
;
1305 static u32
usbg_get_default_depth(struct se_portal_group
*se_tpg
)
1310 static u32
usbg_get_pr_transport_id(
1311 struct se_portal_group
*se_tpg
,
1312 struct se_node_acl
*se_nacl
,
1313 struct t10_pr_registration
*pr_reg
,
1317 struct usbg_tpg
*tpg
= container_of(se_tpg
,
1318 struct usbg_tpg
, se_tpg
);
1319 struct usbg_tport
*tport
= tpg
->tport
;
1322 switch (tport
->tport_proto_id
) {
1323 case SCSI_PROTOCOL_SAS
:
1325 ret
= sas_get_pr_transport_id(se_tpg
, se_nacl
, pr_reg
,
1333 static u32
usbg_get_pr_transport_id_len(
1334 struct se_portal_group
*se_tpg
,
1335 struct se_node_acl
*se_nacl
,
1336 struct t10_pr_registration
*pr_reg
,
1339 struct usbg_tpg
*tpg
= container_of(se_tpg
,
1340 struct usbg_tpg
, se_tpg
);
1341 struct usbg_tport
*tport
= tpg
->tport
;
1344 switch (tport
->tport_proto_id
) {
1345 case SCSI_PROTOCOL_SAS
:
1347 ret
= sas_get_pr_transport_id_len(se_tpg
, se_nacl
, pr_reg
,
1355 static char *usbg_parse_pr_out_transport_id(
1356 struct se_portal_group
*se_tpg
,
1359 char **port_nexus_ptr
)
1361 struct usbg_tpg
*tpg
= container_of(se_tpg
,
1362 struct usbg_tpg
, se_tpg
);
1363 struct usbg_tport
*tport
= tpg
->tport
;
1366 switch (tport
->tport_proto_id
) {
1367 case SCSI_PROTOCOL_SAS
:
1369 tid
= sas_parse_pr_out_transport_id(se_tpg
, buf
, out_tid_len
,
1376 static struct se_node_acl
*usbg_alloc_fabric_acl(struct se_portal_group
*se_tpg
)
1378 struct usbg_nacl
*nacl
;
1380 nacl
= kzalloc(sizeof(struct usbg_nacl
), GFP_KERNEL
);
1382 printk(KERN_ERR
"Unable to alocate struct usbg_nacl\n");
1386 return &nacl
->se_node_acl
;
1389 static void usbg_release_fabric_acl(
1390 struct se_portal_group
*se_tpg
,
1391 struct se_node_acl
*se_nacl
)
1393 struct usbg_nacl
*nacl
= container_of(se_nacl
,
1394 struct usbg_nacl
, se_node_acl
);
1398 static u32
usbg_tpg_get_inst_index(struct se_portal_group
*se_tpg
)
1403 static void usbg_cmd_release(struct kref
*ref
)
1405 struct usbg_cmd
*cmd
= container_of(ref
, struct usbg_cmd
,
1408 transport_generic_free_cmd(&cmd
->se_cmd
, 0);
1411 static void usbg_release_cmd(struct se_cmd
*se_cmd
)
1413 struct usbg_cmd
*cmd
= container_of(se_cmd
, struct usbg_cmd
,
1415 kfree(cmd
->data_buf
);
1420 static int usbg_shutdown_session(struct se_session
*se_sess
)
1425 static void usbg_close_session(struct se_session
*se_sess
)
1430 static u32
usbg_sess_get_index(struct se_session
*se_sess
)
1436 * XXX Error recovery: return != 0 if we expect writes. Dunno when that could be
1438 static int usbg_write_pending_status(struct se_cmd
*se_cmd
)
1443 static void usbg_set_default_node_attrs(struct se_node_acl
*nacl
)
1448 static u32
usbg_get_task_tag(struct se_cmd
*se_cmd
)
1450 struct usbg_cmd
*cmd
= container_of(se_cmd
, struct usbg_cmd
,
1452 struct f_uas
*fu
= cmd
->fu
;
1454 if (fu
->flags
& USBG_IS_BOT
)
1455 return le32_to_cpu(cmd
->bot_tag
);
1460 static int usbg_get_cmd_state(struct se_cmd
*se_cmd
)
1465 static int usbg_queue_tm_rsp(struct se_cmd
*se_cmd
)
1470 static u16
usbg_set_fabric_sense_len(struct se_cmd
*se_cmd
, u32 sense_length
)
1475 static u16
usbg_get_fabric_sense_len(void)
1480 static const char *usbg_check_wwn(const char *name
)
1485 n
= strstr(name
, "naa.");
1490 if (len
== 0 || len
> USBG_NAMELEN
- 1)
1495 static struct se_node_acl
*usbg_make_nodeacl(
1496 struct se_portal_group
*se_tpg
,
1497 struct config_group
*group
,
1500 struct se_node_acl
*se_nacl
, *se_nacl_new
;
1501 struct usbg_nacl
*nacl
;
1504 const char *wnn_name
;
1506 wnn_name
= usbg_check_wwn(name
);
1508 return ERR_PTR(-EINVAL
);
1509 se_nacl_new
= usbg_alloc_fabric_acl(se_tpg
);
1511 return ERR_PTR(-ENOMEM
);
1515 * se_nacl_new may be released by core_tpg_add_initiator_node_acl()
1516 * when converting a NodeACL from demo mode -> explict
1518 se_nacl
= core_tpg_add_initiator_node_acl(se_tpg
, se_nacl_new
,
1520 if (IS_ERR(se_nacl
)) {
1521 usbg_release_fabric_acl(se_tpg
, se_nacl_new
);
1525 * Locate our struct usbg_nacl and set the FC Nport WWPN
1527 nacl
= container_of(se_nacl
, struct usbg_nacl
, se_node_acl
);
1528 nacl
->iport_wwpn
= wwpn
;
1529 snprintf(nacl
->iport_name
, sizeof(nacl
->iport_name
), "%s", name
);
1533 static void usbg_drop_nodeacl(struct se_node_acl
*se_acl
)
1535 struct usbg_nacl
*nacl
= container_of(se_acl
,
1536 struct usbg_nacl
, se_node_acl
);
1537 core_tpg_del_initiator_node_acl(se_acl
->se_tpg
, se_acl
, 1);
1541 struct usbg_tpg
*the_only_tpg_I_currently_have
;
1543 static struct se_portal_group
*usbg_make_tpg(
1545 struct config_group
*group
,
1548 struct usbg_tport
*tport
= container_of(wwn
, struct usbg_tport
,
1550 struct usbg_tpg
*tpg
;
1554 if (strstr(name
, "tpgt_") != name
)
1555 return ERR_PTR(-EINVAL
);
1556 if (kstrtoul(name
+ 5, 0, &tpgt
) || tpgt
> UINT_MAX
)
1557 return ERR_PTR(-EINVAL
);
1558 if (the_only_tpg_I_currently_have
) {
1559 pr_err("Until the gadget framework can't handle multiple\n");
1560 pr_err("gadgets, you can't do this here.\n");
1561 return ERR_PTR(-EBUSY
);
1564 tpg
= kzalloc(sizeof(struct usbg_tpg
), GFP_KERNEL
);
1566 printk(KERN_ERR
"Unable to allocate struct usbg_tpg");
1567 return ERR_PTR(-ENOMEM
);
1569 mutex_init(&tpg
->tpg_mutex
);
1570 atomic_set(&tpg
->tpg_port_count
, 0);
1571 tpg
->workqueue
= alloc_workqueue("tcm_usb_gadget", 0, 1);
1572 if (!tpg
->workqueue
) {
1578 tpg
->tport_tpgt
= tpgt
;
1580 ret
= core_tpg_register(&usbg_fabric_configfs
->tf_ops
, wwn
,
1582 TRANSPORT_TPG_TYPE_NORMAL
);
1584 destroy_workqueue(tpg
->workqueue
);
1588 the_only_tpg_I_currently_have
= tpg
;
1589 return &tpg
->se_tpg
;
1592 static void usbg_drop_tpg(struct se_portal_group
*se_tpg
)
1594 struct usbg_tpg
*tpg
= container_of(se_tpg
,
1595 struct usbg_tpg
, se_tpg
);
1597 core_tpg_deregister(se_tpg
);
1598 destroy_workqueue(tpg
->workqueue
);
1600 the_only_tpg_I_currently_have
= NULL
;
1603 static struct se_wwn
*usbg_make_tport(
1604 struct target_fabric_configfs
*tf
,
1605 struct config_group
*group
,
1608 struct usbg_tport
*tport
;
1609 const char *wnn_name
;
1612 wnn_name
= usbg_check_wwn(name
);
1614 return ERR_PTR(-EINVAL
);
1616 tport
= kzalloc(sizeof(struct usbg_tport
), GFP_KERNEL
);
1618 printk(KERN_ERR
"Unable to allocate struct usbg_tport");
1619 return ERR_PTR(-ENOMEM
);
1621 tport
->tport_wwpn
= wwpn
;
1622 snprintf(tport
->tport_name
, sizeof(tport
->tport_name
), wnn_name
);
1623 return &tport
->tport_wwn
;
1626 static void usbg_drop_tport(struct se_wwn
*wwn
)
1628 struct usbg_tport
*tport
= container_of(wwn
,
1629 struct usbg_tport
, tport_wwn
);
1634 * If somebody feels like dropping the version property, go ahead.
1636 static ssize_t
usbg_wwn_show_attr_version(
1637 struct target_fabric_configfs
*tf
,
1640 return sprintf(page
, "usb-gadget fabric module\n");
1642 TF_WWN_ATTR_RO(usbg
, version
);
1644 static struct configfs_attribute
*usbg_wwn_attrs
[] = {
1645 &usbg_wwn_version
.attr
,
1649 static ssize_t
tcm_usbg_tpg_show_enable(
1650 struct se_portal_group
*se_tpg
,
1653 struct usbg_tpg
*tpg
= container_of(se_tpg
, struct usbg_tpg
, se_tpg
);
1655 return snprintf(page
, PAGE_SIZE
, "%u\n", tpg
->gadget_connect
);
1658 static int usbg_attach(struct usbg_tpg
*);
1659 static void usbg_detach(struct usbg_tpg
*);
1661 static ssize_t
tcm_usbg_tpg_store_enable(
1662 struct se_portal_group
*se_tpg
,
1666 struct usbg_tpg
*tpg
= container_of(se_tpg
, struct usbg_tpg
, se_tpg
);
1670 ret
= kstrtoul(page
, 0, &op
);
1676 if (op
&& tpg
->gadget_connect
)
1678 if (!op
&& !tpg
->gadget_connect
)
1682 ret
= usbg_attach(tpg
);
1688 tpg
->gadget_connect
= op
;
1692 TF_TPG_BASE_ATTR(tcm_usbg
, enable
, S_IRUGO
| S_IWUSR
);
1694 static ssize_t
tcm_usbg_tpg_show_nexus(
1695 struct se_portal_group
*se_tpg
,
1698 struct usbg_tpg
*tpg
= container_of(se_tpg
, struct usbg_tpg
, se_tpg
);
1699 struct tcm_usbg_nexus
*tv_nexus
;
1702 mutex_lock(&tpg
->tpg_mutex
);
1703 tv_nexus
= tpg
->tpg_nexus
;
1708 ret
= snprintf(page
, PAGE_SIZE
, "%s\n",
1709 tv_nexus
->tvn_se_sess
->se_node_acl
->initiatorname
);
1711 mutex_unlock(&tpg
->tpg_mutex
);
1715 static int tcm_usbg_make_nexus(struct usbg_tpg
*tpg
, char *name
)
1717 struct se_portal_group
*se_tpg
;
1718 struct tcm_usbg_nexus
*tv_nexus
;
1721 mutex_lock(&tpg
->tpg_mutex
);
1722 if (tpg
->tpg_nexus
) {
1724 pr_debug("tpg->tpg_nexus already exists\n");
1727 se_tpg
= &tpg
->se_tpg
;
1730 tv_nexus
= kzalloc(sizeof(*tv_nexus
), GFP_KERNEL
);
1732 pr_err("Unable to allocate struct tcm_vhost_nexus\n");
1735 tv_nexus
->tvn_se_sess
= transport_init_session();
1736 if (IS_ERR(tv_nexus
->tvn_se_sess
))
1740 * Since we are running in 'demo mode' this call with generate a
1741 * struct se_node_acl for the tcm_vhost struct se_portal_group with
1742 * the SCSI Initiator port name of the passed configfs group 'name'.
1744 tv_nexus
->tvn_se_sess
->se_node_acl
= core_tpg_check_initiator_node_acl(
1746 if (!tv_nexus
->tvn_se_sess
->se_node_acl
) {
1747 pr_debug("core_tpg_check_initiator_node_acl() failed"
1752 * Now register the TCM vHost virtual I_T Nexus as active with the
1753 * call to __transport_register_session()
1755 __transport_register_session(se_tpg
, tv_nexus
->tvn_se_sess
->se_node_acl
,
1756 tv_nexus
->tvn_se_sess
, tv_nexus
);
1757 tpg
->tpg_nexus
= tv_nexus
;
1758 mutex_unlock(&tpg
->tpg_mutex
);
1762 transport_free_session(tv_nexus
->tvn_se_sess
);
1766 mutex_unlock(&tpg
->tpg_mutex
);
1770 static int tcm_usbg_drop_nexus(struct usbg_tpg
*tpg
)
1772 struct se_session
*se_sess
;
1773 struct tcm_usbg_nexus
*tv_nexus
;
1776 mutex_lock(&tpg
->tpg_mutex
);
1777 tv_nexus
= tpg
->tpg_nexus
;
1781 se_sess
= tv_nexus
->tvn_se_sess
;
1785 if (atomic_read(&tpg
->tpg_port_count
)) {
1787 pr_err("Unable to remove Host I_T Nexus with"
1788 " active TPG port count: %d\n",
1789 atomic_read(&tpg
->tpg_port_count
));
1793 pr_debug("Removing I_T Nexus to Initiator Port: %s\n",
1794 tv_nexus
->tvn_se_sess
->se_node_acl
->initiatorname
);
1796 * Release the SCSI I_T Nexus to the emulated vHost Target Port
1798 transport_deregister_session(tv_nexus
->tvn_se_sess
);
1799 tpg
->tpg_nexus
= NULL
;
1803 mutex_unlock(&tpg
->tpg_mutex
);
1807 static ssize_t
tcm_usbg_tpg_store_nexus(
1808 struct se_portal_group
*se_tpg
,
1812 struct usbg_tpg
*tpg
= container_of(se_tpg
, struct usbg_tpg
, se_tpg
);
1813 unsigned char i_port
[USBG_NAMELEN
], *ptr
;
1816 if (!strncmp(page
, "NULL", 4)) {
1817 ret
= tcm_usbg_drop_nexus(tpg
);
1818 return (!ret
) ? count
: ret
;
1820 if (strlen(page
) > USBG_NAMELEN
) {
1821 pr_err("Emulated NAA Sas Address: %s, exceeds"
1822 " max: %d\n", page
, USBG_NAMELEN
);
1825 snprintf(i_port
, USBG_NAMELEN
, "%s", page
);
1827 ptr
= strstr(i_port
, "naa.");
1829 pr_err("Missing 'naa.' prefix\n");
1833 if (i_port
[strlen(i_port
) - 1] == '\n')
1834 i_port
[strlen(i_port
) - 1] = '\0';
1836 ret
= tcm_usbg_make_nexus(tpg
, &i_port
[4]);
1841 TF_TPG_BASE_ATTR(tcm_usbg
, nexus
, S_IRUGO
| S_IWUSR
);
1843 static struct configfs_attribute
*usbg_base_attrs
[] = {
1844 &tcm_usbg_tpg_enable
.attr
,
1845 &tcm_usbg_tpg_nexus
.attr
,
1849 static int usbg_port_link(struct se_portal_group
*se_tpg
, struct se_lun
*lun
)
1851 struct usbg_tpg
*tpg
= container_of(se_tpg
, struct usbg_tpg
, se_tpg
);
1853 atomic_inc(&tpg
->tpg_port_count
);
1854 smp_mb__after_atomic_inc();
1858 static void usbg_port_unlink(struct se_portal_group
*se_tpg
,
1859 struct se_lun
*se_lun
)
1861 struct usbg_tpg
*tpg
= container_of(se_tpg
, struct usbg_tpg
, se_tpg
);
1863 atomic_dec(&tpg
->tpg_port_count
);
1864 smp_mb__after_atomic_dec();
1867 static int usbg_check_stop_free(struct se_cmd
*se_cmd
)
1869 struct usbg_cmd
*cmd
= container_of(se_cmd
, struct usbg_cmd
,
1872 kref_put(&cmd
->ref
, usbg_cmd_release
);
1876 static struct target_core_fabric_ops usbg_ops
= {
1877 .get_fabric_name
= usbg_get_fabric_name
,
1878 .get_fabric_proto_ident
= usbg_get_fabric_proto_ident
,
1879 .tpg_get_wwn
= usbg_get_fabric_wwn
,
1880 .tpg_get_tag
= usbg_get_tag
,
1881 .tpg_get_default_depth
= usbg_get_default_depth
,
1882 .tpg_get_pr_transport_id
= usbg_get_pr_transport_id
,
1883 .tpg_get_pr_transport_id_len
= usbg_get_pr_transport_id_len
,
1884 .tpg_parse_pr_out_transport_id
= usbg_parse_pr_out_transport_id
,
1885 .tpg_check_demo_mode
= usbg_check_true
,
1886 .tpg_check_demo_mode_cache
= usbg_check_false
,
1887 .tpg_check_demo_mode_write_protect
= usbg_check_false
,
1888 .tpg_check_prod_mode_write_protect
= usbg_check_false
,
1889 .tpg_alloc_fabric_acl
= usbg_alloc_fabric_acl
,
1890 .tpg_release_fabric_acl
= usbg_release_fabric_acl
,
1891 .tpg_get_inst_index
= usbg_tpg_get_inst_index
,
1892 .release_cmd
= usbg_release_cmd
,
1893 .shutdown_session
= usbg_shutdown_session
,
1894 .close_session
= usbg_close_session
,
1895 .sess_get_index
= usbg_sess_get_index
,
1896 .sess_get_initiator_sid
= NULL
,
1897 .write_pending
= usbg_send_write_request
,
1898 .write_pending_status
= usbg_write_pending_status
,
1899 .set_default_node_attributes
= usbg_set_default_node_attrs
,
1900 .get_task_tag
= usbg_get_task_tag
,
1901 .get_cmd_state
= usbg_get_cmd_state
,
1902 .queue_data_in
= usbg_send_read_response
,
1903 .queue_status
= usbg_send_status_response
,
1904 .queue_tm_rsp
= usbg_queue_tm_rsp
,
1905 .get_fabric_sense_len
= usbg_get_fabric_sense_len
,
1906 .set_fabric_sense_len
= usbg_set_fabric_sense_len
,
1907 .check_stop_free
= usbg_check_stop_free
,
1909 .fabric_make_wwn
= usbg_make_tport
,
1910 .fabric_drop_wwn
= usbg_drop_tport
,
1911 .fabric_make_tpg
= usbg_make_tpg
,
1912 .fabric_drop_tpg
= usbg_drop_tpg
,
1913 .fabric_post_link
= usbg_port_link
,
1914 .fabric_pre_unlink
= usbg_port_unlink
,
1915 .fabric_make_np
= NULL
,
1916 .fabric_drop_np
= NULL
,
1917 .fabric_make_nodeacl
= usbg_make_nodeacl
,
1918 .fabric_drop_nodeacl
= usbg_drop_nodeacl
,
1921 static int usbg_register_configfs(void)
1923 struct target_fabric_configfs
*fabric
;
1926 fabric
= target_fabric_configfs_init(THIS_MODULE
, "usb_gadget");
1927 if (IS_ERR(fabric
)) {
1928 printk(KERN_ERR
"target_fabric_configfs_init() failed\n");
1929 return PTR_ERR(fabric
);
1932 fabric
->tf_ops
= usbg_ops
;
1933 TF_CIT_TMPL(fabric
)->tfc_wwn_cit
.ct_attrs
= usbg_wwn_attrs
;
1934 TF_CIT_TMPL(fabric
)->tfc_tpg_base_cit
.ct_attrs
= usbg_base_attrs
;
1935 TF_CIT_TMPL(fabric
)->tfc_tpg_attrib_cit
.ct_attrs
= NULL
;
1936 TF_CIT_TMPL(fabric
)->tfc_tpg_param_cit
.ct_attrs
= NULL
;
1937 TF_CIT_TMPL(fabric
)->tfc_tpg_np_base_cit
.ct_attrs
= NULL
;
1938 TF_CIT_TMPL(fabric
)->tfc_tpg_nacl_base_cit
.ct_attrs
= NULL
;
1939 TF_CIT_TMPL(fabric
)->tfc_tpg_nacl_attrib_cit
.ct_attrs
= NULL
;
1940 TF_CIT_TMPL(fabric
)->tfc_tpg_nacl_auth_cit
.ct_attrs
= NULL
;
1941 TF_CIT_TMPL(fabric
)->tfc_tpg_nacl_param_cit
.ct_attrs
= NULL
;
1942 ret
= target_fabric_configfs_register(fabric
);
1944 printk(KERN_ERR
"target_fabric_configfs_register() failed"
1945 " for usb-gadget\n");
1948 usbg_fabric_configfs
= fabric
;
1952 static void usbg_deregister_configfs(void)
1954 if (!(usbg_fabric_configfs
))
1957 target_fabric_configfs_deregister(usbg_fabric_configfs
);
1958 usbg_fabric_configfs
= NULL
;
1961 /* Start gadget.c code */
1963 static struct usb_interface_descriptor bot_intf_desc
= {
1964 .bLength
= sizeof(bot_intf_desc
),
1965 .bDescriptorType
= USB_DT_INTERFACE
,
1966 .bAlternateSetting
= 0,
1968 .bAlternateSetting
= USB_G_ALT_INT_BBB
,
1969 .bInterfaceClass
= USB_CLASS_MASS_STORAGE
,
1970 .bInterfaceSubClass
= USB_SC_SCSI
,
1971 .bInterfaceProtocol
= USB_PR_BULK
,
1972 .iInterface
= USB_G_STR_INT_UAS
,
1975 static struct usb_interface_descriptor uasp_intf_desc
= {
1976 .bLength
= sizeof(uasp_intf_desc
),
1977 .bDescriptorType
= USB_DT_INTERFACE
,
1979 .bAlternateSetting
= USB_G_ALT_INT_UAS
,
1980 .bInterfaceClass
= USB_CLASS_MASS_STORAGE
,
1981 .bInterfaceSubClass
= USB_SC_SCSI
,
1982 .bInterfaceProtocol
= USB_PR_UAS
,
1983 .iInterface
= USB_G_STR_INT_BBB
,
1986 static struct usb_endpoint_descriptor uasp_bi_desc
= {
1987 .bLength
= USB_DT_ENDPOINT_SIZE
,
1988 .bDescriptorType
= USB_DT_ENDPOINT
,
1989 .bEndpointAddress
= USB_DIR_IN
,
1990 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
1991 .wMaxPacketSize
= cpu_to_le16(512),
1994 static struct usb_endpoint_descriptor uasp_fs_bi_desc
= {
1995 .bLength
= USB_DT_ENDPOINT_SIZE
,
1996 .bDescriptorType
= USB_DT_ENDPOINT
,
1997 .bEndpointAddress
= USB_DIR_IN
,
1998 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
2001 static struct usb_pipe_usage_descriptor uasp_bi_pipe_desc
= {
2002 .bLength
= sizeof(uasp_bi_pipe_desc
),
2003 .bDescriptorType
= USB_DT_PIPE_USAGE
,
2004 .bPipeID
= DATA_IN_PIPE_ID
,
2007 static struct usb_endpoint_descriptor uasp_ss_bi_desc
= {
2008 .bLength
= USB_DT_ENDPOINT_SIZE
,
2009 .bDescriptorType
= USB_DT_ENDPOINT
,
2010 .bEndpointAddress
= USB_DIR_IN
,
2011 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
2012 .wMaxPacketSize
= cpu_to_le16(1024),
2015 static struct usb_ss_ep_comp_descriptor uasp_bi_ep_comp_desc
= {
2016 .bLength
= sizeof(uasp_bi_ep_comp_desc
),
2017 .bDescriptorType
= USB_DT_SS_ENDPOINT_COMP
,
2019 .bmAttributes
= UASP_SS_EP_COMP_LOG_STREAMS
,
2020 .wBytesPerInterval
= 0,
2023 static struct usb_ss_ep_comp_descriptor bot_bi_ep_comp_desc
= {
2024 .bLength
= sizeof(bot_bi_ep_comp_desc
),
2025 .bDescriptorType
= USB_DT_SS_ENDPOINT_COMP
,
2029 static struct usb_endpoint_descriptor uasp_bo_desc
= {
2030 .bLength
= USB_DT_ENDPOINT_SIZE
,
2031 .bDescriptorType
= USB_DT_ENDPOINT
,
2032 .bEndpointAddress
= USB_DIR_OUT
,
2033 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
2034 .wMaxPacketSize
= cpu_to_le16(512),
2037 static struct usb_endpoint_descriptor uasp_fs_bo_desc
= {
2038 .bLength
= USB_DT_ENDPOINT_SIZE
,
2039 .bDescriptorType
= USB_DT_ENDPOINT
,
2040 .bEndpointAddress
= USB_DIR_OUT
,
2041 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
2044 static struct usb_pipe_usage_descriptor uasp_bo_pipe_desc
= {
2045 .bLength
= sizeof(uasp_bo_pipe_desc
),
2046 .bDescriptorType
= USB_DT_PIPE_USAGE
,
2047 .bPipeID
= DATA_OUT_PIPE_ID
,
2050 static struct usb_endpoint_descriptor uasp_ss_bo_desc
= {
2051 .bLength
= USB_DT_ENDPOINT_SIZE
,
2052 .bDescriptorType
= USB_DT_ENDPOINT
,
2053 .bEndpointAddress
= USB_DIR_OUT
,
2054 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
2055 .wMaxPacketSize
= cpu_to_le16(0x400),
2058 static struct usb_ss_ep_comp_descriptor uasp_bo_ep_comp_desc
= {
2059 .bLength
= sizeof(uasp_bo_ep_comp_desc
),
2060 .bDescriptorType
= USB_DT_SS_ENDPOINT_COMP
,
2061 .bmAttributes
= UASP_SS_EP_COMP_LOG_STREAMS
,
2064 static struct usb_ss_ep_comp_descriptor bot_bo_ep_comp_desc
= {
2065 .bLength
= sizeof(bot_bo_ep_comp_desc
),
2066 .bDescriptorType
= USB_DT_SS_ENDPOINT_COMP
,
2069 static struct usb_endpoint_descriptor uasp_status_desc
= {
2070 .bLength
= USB_DT_ENDPOINT_SIZE
,
2071 .bDescriptorType
= USB_DT_ENDPOINT
,
2072 .bEndpointAddress
= USB_DIR_IN
,
2073 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
2074 .wMaxPacketSize
= cpu_to_le16(512),
2077 static struct usb_endpoint_descriptor uasp_fs_status_desc
= {
2078 .bLength
= USB_DT_ENDPOINT_SIZE
,
2079 .bDescriptorType
= USB_DT_ENDPOINT
,
2080 .bEndpointAddress
= USB_DIR_IN
,
2081 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
2084 static struct usb_pipe_usage_descriptor uasp_status_pipe_desc
= {
2085 .bLength
= sizeof(uasp_status_pipe_desc
),
2086 .bDescriptorType
= USB_DT_PIPE_USAGE
,
2087 .bPipeID
= STATUS_PIPE_ID
,
2090 static struct usb_endpoint_descriptor uasp_ss_status_desc
= {
2091 .bLength
= USB_DT_ENDPOINT_SIZE
,
2092 .bDescriptorType
= USB_DT_ENDPOINT
,
2093 .bEndpointAddress
= USB_DIR_IN
,
2094 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
2095 .wMaxPacketSize
= cpu_to_le16(1024),
2098 static struct usb_ss_ep_comp_descriptor uasp_status_in_ep_comp_desc
= {
2099 .bLength
= sizeof(uasp_status_in_ep_comp_desc
),
2100 .bDescriptorType
= USB_DT_SS_ENDPOINT_COMP
,
2101 .bmAttributes
= UASP_SS_EP_COMP_LOG_STREAMS
,
2104 static struct usb_endpoint_descriptor uasp_cmd_desc
= {
2105 .bLength
= USB_DT_ENDPOINT_SIZE
,
2106 .bDescriptorType
= USB_DT_ENDPOINT
,
2107 .bEndpointAddress
= USB_DIR_OUT
,
2108 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
2109 .wMaxPacketSize
= cpu_to_le16(512),
2112 static struct usb_endpoint_descriptor uasp_fs_cmd_desc
= {
2113 .bLength
= USB_DT_ENDPOINT_SIZE
,
2114 .bDescriptorType
= USB_DT_ENDPOINT
,
2115 .bEndpointAddress
= USB_DIR_OUT
,
2116 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
2119 static struct usb_pipe_usage_descriptor uasp_cmd_pipe_desc
= {
2120 .bLength
= sizeof(uasp_cmd_pipe_desc
),
2121 .bDescriptorType
= USB_DT_PIPE_USAGE
,
2122 .bPipeID
= CMD_PIPE_ID
,
2125 static struct usb_endpoint_descriptor uasp_ss_cmd_desc
= {
2126 .bLength
= USB_DT_ENDPOINT_SIZE
,
2127 .bDescriptorType
= USB_DT_ENDPOINT
,
2128 .bEndpointAddress
= USB_DIR_OUT
,
2129 .bmAttributes
= USB_ENDPOINT_XFER_BULK
,
2130 .wMaxPacketSize
= cpu_to_le16(1024),
2133 static struct usb_ss_ep_comp_descriptor uasp_cmd_comp_desc
= {
2134 .bLength
= sizeof(uasp_cmd_comp_desc
),
2135 .bDescriptorType
= USB_DT_SS_ENDPOINT_COMP
,
2138 static struct usb_descriptor_header
*uasp_fs_function_desc
[] = {
2139 (struct usb_descriptor_header
*) &bot_intf_desc
,
2140 (struct usb_descriptor_header
*) &uasp_fs_bi_desc
,
2141 (struct usb_descriptor_header
*) &uasp_fs_bo_desc
,
2143 (struct usb_descriptor_header
*) &uasp_intf_desc
,
2144 (struct usb_descriptor_header
*) &uasp_fs_bi_desc
,
2145 (struct usb_descriptor_header
*) &uasp_bi_pipe_desc
,
2146 (struct usb_descriptor_header
*) &uasp_fs_bo_desc
,
2147 (struct usb_descriptor_header
*) &uasp_bo_pipe_desc
,
2148 (struct usb_descriptor_header
*) &uasp_fs_status_desc
,
2149 (struct usb_descriptor_header
*) &uasp_status_pipe_desc
,
2150 (struct usb_descriptor_header
*) &uasp_fs_cmd_desc
,
2151 (struct usb_descriptor_header
*) &uasp_cmd_pipe_desc
,
2154 static struct usb_descriptor_header
*uasp_hs_function_desc
[] = {
2155 (struct usb_descriptor_header
*) &bot_intf_desc
,
2156 (struct usb_descriptor_header
*) &uasp_bi_desc
,
2157 (struct usb_descriptor_header
*) &uasp_bo_desc
,
2159 (struct usb_descriptor_header
*) &uasp_intf_desc
,
2160 (struct usb_descriptor_header
*) &uasp_bi_desc
,
2161 (struct usb_descriptor_header
*) &uasp_bi_pipe_desc
,
2162 (struct usb_descriptor_header
*) &uasp_bo_desc
,
2163 (struct usb_descriptor_header
*) &uasp_bo_pipe_desc
,
2164 (struct usb_descriptor_header
*) &uasp_status_desc
,
2165 (struct usb_descriptor_header
*) &uasp_status_pipe_desc
,
2166 (struct usb_descriptor_header
*) &uasp_cmd_desc
,
2167 (struct usb_descriptor_header
*) &uasp_cmd_pipe_desc
,
2171 static struct usb_descriptor_header
*uasp_ss_function_desc
[] = {
2172 (struct usb_descriptor_header
*) &bot_intf_desc
,
2173 (struct usb_descriptor_header
*) &uasp_ss_bi_desc
,
2174 (struct usb_descriptor_header
*) &bot_bi_ep_comp_desc
,
2175 (struct usb_descriptor_header
*) &uasp_ss_bo_desc
,
2176 (struct usb_descriptor_header
*) &bot_bo_ep_comp_desc
,
2178 (struct usb_descriptor_header
*) &uasp_intf_desc
,
2179 (struct usb_descriptor_header
*) &uasp_ss_bi_desc
,
2180 (struct usb_descriptor_header
*) &uasp_bi_ep_comp_desc
,
2181 (struct usb_descriptor_header
*) &uasp_bi_pipe_desc
,
2182 (struct usb_descriptor_header
*) &uasp_ss_bo_desc
,
2183 (struct usb_descriptor_header
*) &uasp_bo_ep_comp_desc
,
2184 (struct usb_descriptor_header
*) &uasp_bo_pipe_desc
,
2185 (struct usb_descriptor_header
*) &uasp_ss_status_desc
,
2186 (struct usb_descriptor_header
*) &uasp_status_in_ep_comp_desc
,
2187 (struct usb_descriptor_header
*) &uasp_status_pipe_desc
,
2188 (struct usb_descriptor_header
*) &uasp_ss_cmd_desc
,
2189 (struct usb_descriptor_header
*) &uasp_cmd_comp_desc
,
2190 (struct usb_descriptor_header
*) &uasp_cmd_pipe_desc
,
2194 #define UAS_VENDOR_ID 0x0525 /* NetChip */
2195 #define UAS_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */
2197 static struct usb_device_descriptor usbg_device_desc
= {
2198 .bLength
= sizeof(usbg_device_desc
),
2199 .bDescriptorType
= USB_DT_DEVICE
,
2200 .bcdUSB
= cpu_to_le16(0x0200),
2201 .bDeviceClass
= USB_CLASS_PER_INTERFACE
,
2202 .idVendor
= cpu_to_le16(UAS_VENDOR_ID
),
2203 .idProduct
= cpu_to_le16(UAS_PRODUCT_ID
),
2204 .iManufacturer
= USB_G_STR_MANUFACTOR
,
2205 .iProduct
= USB_G_STR_PRODUCT
,
2206 .iSerialNumber
= USB_G_STR_SERIAL
,
2208 .bNumConfigurations
= 1,
2211 static struct usb_string usbg_us_strings
[] = {
2212 { USB_G_STR_MANUFACTOR
, "Target Manufactor"},
2213 { USB_G_STR_PRODUCT
, "Target Product"},
2214 { USB_G_STR_SERIAL
, "000000000001"},
2215 { USB_G_STR_CONFIG
, "default config"},
2216 { USB_G_STR_INT_UAS
, "USB Attached SCSI"},
2217 { USB_G_STR_INT_BBB
, "Bulk Only Transport"},
2221 static struct usb_gadget_strings usbg_stringtab
= {
2223 .strings
= usbg_us_strings
,
2226 static struct usb_gadget_strings
*usbg_strings
[] = {
2231 static int guas_unbind(struct usb_composite_dev
*cdev
)
2236 static struct usb_configuration usbg_config_driver
= {
2237 .label
= "Linux Target",
2238 .bConfigurationValue
= 1,
2239 .iConfiguration
= USB_G_STR_CONFIG
,
2240 .bmAttributes
= USB_CONFIG_ATT_SELFPOWER
,
2243 static void give_back_ep(struct usb_ep
**pep
)
2245 struct usb_ep
*ep
= *pep
;
2248 ep
->driver_data
= NULL
;
2251 static int usbg_bind(struct usb_configuration
*c
, struct usb_function
*f
)
2253 struct f_uas
*fu
= to_f_uas(f
);
2254 struct usb_gadget
*gadget
= c
->cdev
->gadget
;
2258 iface
= usb_interface_id(c
, f
);
2262 bot_intf_desc
.bInterfaceNumber
= iface
;
2263 uasp_intf_desc
.bInterfaceNumber
= iface
;
2265 ep
= usb_ep_autoconfig_ss(gadget
, &uasp_ss_bi_desc
,
2266 &uasp_bi_ep_comp_desc
);
2270 ep
->driver_data
= fu
;
2273 ep
= usb_ep_autoconfig_ss(gadget
, &uasp_ss_bo_desc
,
2274 &uasp_bo_ep_comp_desc
);
2277 ep
->driver_data
= fu
;
2280 ep
= usb_ep_autoconfig_ss(gadget
, &uasp_ss_status_desc
,
2281 &uasp_status_in_ep_comp_desc
);
2284 ep
->driver_data
= fu
;
2287 ep
= usb_ep_autoconfig_ss(gadget
, &uasp_ss_cmd_desc
,
2288 &uasp_cmd_comp_desc
);
2291 ep
->driver_data
= fu
;
2294 /* Assume endpoint addresses are the same for both speeds */
2295 uasp_bi_desc
.bEndpointAddress
= uasp_ss_bi_desc
.bEndpointAddress
;
2296 uasp_bo_desc
.bEndpointAddress
= uasp_ss_bo_desc
.bEndpointAddress
;
2297 uasp_status_desc
.bEndpointAddress
=
2298 uasp_ss_status_desc
.bEndpointAddress
;
2299 uasp_cmd_desc
.bEndpointAddress
= uasp_ss_cmd_desc
.bEndpointAddress
;
2301 uasp_fs_bi_desc
.bEndpointAddress
= uasp_ss_bi_desc
.bEndpointAddress
;
2302 uasp_fs_bo_desc
.bEndpointAddress
= uasp_ss_bo_desc
.bEndpointAddress
;
2303 uasp_fs_status_desc
.bEndpointAddress
=
2304 uasp_ss_status_desc
.bEndpointAddress
;
2305 uasp_fs_cmd_desc
.bEndpointAddress
= uasp_ss_cmd_desc
.bEndpointAddress
;
2309 pr_err("Can't claim all required eps\n");
2311 give_back_ep(&fu
->ep_in
);
2312 give_back_ep(&fu
->ep_out
);
2313 give_back_ep(&fu
->ep_status
);
2314 give_back_ep(&fu
->ep_cmd
);
2318 static void usbg_unbind(struct usb_configuration
*c
, struct usb_function
*f
)
2320 struct f_uas
*fu
= to_f_uas(f
);
2325 struct guas_setup_wq
{
2326 struct work_struct work
;
2331 static void usbg_delayed_set_alt(struct work_struct
*wq
)
2333 struct guas_setup_wq
*work
= container_of(wq
, struct guas_setup_wq
,
2335 struct f_uas
*fu
= work
->fu
;
2336 int alt
= work
->alt
;
2340 if (fu
->flags
& USBG_IS_BOT
)
2341 bot_cleanup_old_alt(fu
);
2342 if (fu
->flags
& USBG_IS_UAS
)
2343 uasp_cleanup_old_alt(fu
);
2345 if (alt
== USB_G_ALT_INT_BBB
)
2347 else if (alt
== USB_G_ALT_INT_UAS
)
2349 usb_composite_setup_continue(fu
->function
.config
->cdev
);
2352 static int usbg_set_alt(struct usb_function
*f
, unsigned intf
, unsigned alt
)
2354 struct f_uas
*fu
= to_f_uas(f
);
2356 if ((alt
== USB_G_ALT_INT_BBB
) || (alt
== USB_G_ALT_INT_UAS
)) {
2357 struct guas_setup_wq
*work
;
2359 work
= kmalloc(sizeof(*work
), GFP_ATOMIC
);
2362 INIT_WORK(&work
->work
, usbg_delayed_set_alt
);
2365 schedule_work(&work
->work
);
2366 return USB_GADGET_DELAYED_STATUS
;
2371 static void usbg_disable(struct usb_function
*f
)
2373 struct f_uas
*fu
= to_f_uas(f
);
2375 if (fu
->flags
& USBG_IS_UAS
)
2376 uasp_cleanup_old_alt(fu
);
2377 else if (fu
->flags
& USBG_IS_BOT
)
2378 bot_cleanup_old_alt(fu
);
2382 static int usbg_setup(struct usb_function
*f
,
2383 const struct usb_ctrlrequest
*ctrl
)
2385 struct f_uas
*fu
= to_f_uas(f
);
2387 if (!(fu
->flags
& USBG_IS_BOT
))
2390 return usbg_bot_setup(f
, ctrl
);
2393 static int usbg_cfg_bind(struct usb_configuration
*c
)
2398 fu
= kzalloc(sizeof(*fu
), GFP_KERNEL
);
2401 fu
->function
.name
= "Target Function";
2402 fu
->function
.descriptors
= uasp_fs_function_desc
;
2403 fu
->function
.hs_descriptors
= uasp_hs_function_desc
;
2404 fu
->function
.ss_descriptors
= uasp_ss_function_desc
;
2405 fu
->function
.bind
= usbg_bind
;
2406 fu
->function
.unbind
= usbg_unbind
;
2407 fu
->function
.set_alt
= usbg_set_alt
;
2408 fu
->function
.setup
= usbg_setup
;
2409 fu
->function
.disable
= usbg_disable
;
2410 fu
->tpg
= the_only_tpg_I_currently_have
;
2412 ret
= usb_add_function(c
, &fu
->function
);
2422 static int usb_target_bind(struct usb_composite_dev
*cdev
)
2426 ret
= usb_add_config(cdev
, &usbg_config_driver
,
2431 static struct usb_composite_driver usbg_driver
= {
2433 .dev
= &usbg_device_desc
,
2434 .strings
= usbg_strings
,
2435 .max_speed
= USB_SPEED_SUPER
,
2436 .unbind
= guas_unbind
,
2439 static int usbg_attach(struct usbg_tpg
*tpg
)
2441 return usb_composite_probe(&usbg_driver
, usb_target_bind
);
2444 static void usbg_detach(struct usbg_tpg
*tpg
)
2446 usb_composite_unregister(&usbg_driver
);
2449 static int __init
usb_target_gadget_init(void)
2453 ret
= usbg_register_configfs();
2456 module_init(usb_target_gadget_init
);
2458 static void __exit
usb_target_gadget_exit(void)
2460 usbg_deregister_configfs();
2462 module_exit(usb_target_gadget_exit
);
2464 MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
2465 MODULE_DESCRIPTION("usb-gadget fabric");
2466 MODULE_LICENSE("GPL v2");