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 transport_generic_process_write(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 transport_generic_process_write(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 int usbg_new_cmd(struct se_cmd *se_cmd)
1405 struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd,
1409 ret = target_setup_cmd_from_cdb(se_cmd, cmd->cmd_buf);
1413 return transport_generic_map_mem_to_cmd(se_cmd, NULL, 0, NULL, 0);
1416 static void usbg_cmd_release(struct kref *ref)
1418 struct usbg_cmd *cmd = container_of(ref, struct usbg_cmd,
1421 transport_generic_free_cmd(&cmd->se_cmd, 0);
1424 static void usbg_release_cmd(struct se_cmd *se_cmd)
1426 struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd,
1428 kfree(cmd->data_buf);
1433 static int usbg_shutdown_session(struct se_session *se_sess)
1438 static void usbg_close_session(struct se_session *se_sess)
1443 static u32 usbg_sess_get_index(struct se_session *se_sess)
1449 * XXX Error recovery: return != 0 if we expect writes. Dunno when that could be
1451 static int usbg_write_pending_status(struct se_cmd *se_cmd)
1456 static void usbg_set_default_node_attrs(struct se_node_acl *nacl)
1461 static u32 usbg_get_task_tag(struct se_cmd *se_cmd)
1463 struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd,
1465 struct f_uas *fu = cmd->fu;
1467 if (fu->flags & USBG_IS_BOT)
1468 return le32_to_cpu(cmd->bot_tag);
1473 static int usbg_get_cmd_state(struct se_cmd *se_cmd)
1478 static int usbg_queue_tm_rsp(struct se_cmd *se_cmd)
1483 static u16 usbg_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_length)
1488 static u16 usbg_get_fabric_sense_len(void)
1493 static const char *usbg_check_wwn(const char *name)
1498 n = strstr(name, "naa.");
1503 if (len == 0 || len > USBG_NAMELEN - 1)
1508 static struct se_node_acl *usbg_make_nodeacl(
1509 struct se_portal_group *se_tpg,
1510 struct config_group *group,
1513 struct se_node_acl *se_nacl, *se_nacl_new;
1514 struct usbg_nacl *nacl;
1517 const char *wnn_name;
1519 wnn_name = usbg_check_wwn(name);
1521 return ERR_PTR(-EINVAL);
1522 se_nacl_new = usbg_alloc_fabric_acl(se_tpg);
1524 return ERR_PTR(-ENOMEM);
1528 * se_nacl_new may be released by core_tpg_add_initiator_node_acl()
1529 * when converting a NodeACL from demo mode -> explict
1531 se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
1533 if (IS_ERR(se_nacl)) {
1534 usbg_release_fabric_acl(se_tpg, se_nacl_new);
1538 * Locate our struct usbg_nacl and set the FC Nport WWPN
1540 nacl = container_of(se_nacl, struct usbg_nacl, se_node_acl);
1541 nacl->iport_wwpn = wwpn;
1542 snprintf(nacl->iport_name, sizeof(nacl->iport_name), "%s", name);
1546 static void usbg_drop_nodeacl(struct se_node_acl *se_acl)
1548 struct usbg_nacl *nacl = container_of(se_acl,
1549 struct usbg_nacl, se_node_acl);
1550 core_tpg_del_initiator_node_acl(se_acl->se_tpg, se_acl, 1);
1554 struct usbg_tpg *the_only_tpg_I_currently_have;
1556 static struct se_portal_group *usbg_make_tpg(
1558 struct config_group *group,
1561 struct usbg_tport *tport = container_of(wwn, struct usbg_tport,
1563 struct usbg_tpg *tpg;
1567 if (strstr(name, "tpgt_") != name)
1568 return ERR_PTR(-EINVAL);
1569 if (kstrtoul(name + 5, 0, &tpgt) || tpgt > UINT_MAX)
1570 return ERR_PTR(-EINVAL);
1571 if (the_only_tpg_I_currently_have) {
1572 pr_err("Until the gadget framework can't handle multiple\n");
1573 pr_err("gadgets, you can't do this here.\n");
1574 return ERR_PTR(-EBUSY);
1577 tpg = kzalloc(sizeof(struct usbg_tpg), GFP_KERNEL);
1579 printk(KERN_ERR "Unable to allocate struct usbg_tpg");
1580 return ERR_PTR(-ENOMEM);
1582 mutex_init(&tpg->tpg_mutex);
1583 atomic_set(&tpg->tpg_port_count, 0);
1584 tpg->workqueue = alloc_workqueue("tcm_usb_gadget", 0, 1);
1585 if (!tpg->workqueue) {
1591 tpg->tport_tpgt = tpgt;
1593 ret = core_tpg_register(&usbg_fabric_configfs->tf_ops, wwn,
1595 TRANSPORT_TPG_TYPE_NORMAL);
1597 destroy_workqueue(tpg->workqueue);
1601 the_only_tpg_I_currently_have = tpg;
1602 return &tpg->se_tpg;
1605 static void usbg_drop_tpg(struct se_portal_group *se_tpg)
1607 struct usbg_tpg *tpg = container_of(se_tpg,
1608 struct usbg_tpg, se_tpg);
1610 core_tpg_deregister(se_tpg);
1611 destroy_workqueue(tpg->workqueue);
1613 the_only_tpg_I_currently_have = NULL;
1616 static struct se_wwn *usbg_make_tport(
1617 struct target_fabric_configfs *tf,
1618 struct config_group *group,
1621 struct usbg_tport *tport;
1622 const char *wnn_name;
1625 wnn_name = usbg_check_wwn(name);
1627 return ERR_PTR(-EINVAL);
1629 tport = kzalloc(sizeof(struct usbg_tport), GFP_KERNEL);
1631 printk(KERN_ERR "Unable to allocate struct usbg_tport");
1632 return ERR_PTR(-ENOMEM);
1634 tport->tport_wwpn = wwpn;
1635 snprintf(tport->tport_name, sizeof(tport->tport_name), wnn_name);
1636 return &tport->tport_wwn;
1639 static void usbg_drop_tport(struct se_wwn *wwn)
1641 struct usbg_tport *tport = container_of(wwn,
1642 struct usbg_tport, tport_wwn);
1647 * If somebody feels like dropping the version property, go ahead.
1649 static ssize_t usbg_wwn_show_attr_version(
1650 struct target_fabric_configfs *tf,
1653 return sprintf(page, "usb-gadget fabric module\n");
1655 TF_WWN_ATTR_RO(usbg, version);
1657 static struct configfs_attribute *usbg_wwn_attrs[] = {
1658 &usbg_wwn_version.attr,
1662 static ssize_t tcm_usbg_tpg_show_enable(
1663 struct se_portal_group *se_tpg,
1666 struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
1668 return snprintf(page, PAGE_SIZE, "%u\n", tpg->gadget_connect);
1671 static int usbg_attach(struct usbg_tpg *);
1672 static void usbg_detach(struct usbg_tpg *);
1674 static ssize_t tcm_usbg_tpg_store_enable(
1675 struct se_portal_group *se_tpg,
1679 struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
1683 ret = kstrtoul(page, 0, &op);
1689 if (op && tpg->gadget_connect)
1691 if (!op && !tpg->gadget_connect)
1695 ret = usbg_attach(tpg);
1701 tpg->gadget_connect = op;
1705 TF_TPG_BASE_ATTR(tcm_usbg, enable, S_IRUGO | S_IWUSR);
1707 static ssize_t tcm_usbg_tpg_show_nexus(
1708 struct se_portal_group *se_tpg,
1711 struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
1712 struct tcm_usbg_nexus *tv_nexus;
1715 mutex_lock(&tpg->tpg_mutex);
1716 tv_nexus = tpg->tpg_nexus;
1721 ret = snprintf(page, PAGE_SIZE, "%s\n",
1722 tv_nexus->tvn_se_sess->se_node_acl->initiatorname);
1724 mutex_unlock(&tpg->tpg_mutex);
1728 static int tcm_usbg_make_nexus(struct usbg_tpg *tpg, char *name)
1730 struct se_portal_group *se_tpg;
1731 struct tcm_usbg_nexus *tv_nexus;
1734 mutex_lock(&tpg->tpg_mutex);
1735 if (tpg->tpg_nexus) {
1737 pr_debug("tpg->tpg_nexus already exists\n");
1740 se_tpg = &tpg->se_tpg;
1743 tv_nexus = kzalloc(sizeof(*tv_nexus), GFP_KERNEL);
1745 pr_err("Unable to allocate struct tcm_vhost_nexus\n");
1748 tv_nexus->tvn_se_sess = transport_init_session();
1749 if (IS_ERR(tv_nexus->tvn_se_sess))
1753 * Since we are running in 'demo mode' this call with generate a
1754 * struct se_node_acl for the tcm_vhost struct se_portal_group with
1755 * the SCSI Initiator port name of the passed configfs group 'name'.
1757 tv_nexus->tvn_se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
1759 if (!tv_nexus->tvn_se_sess->se_node_acl) {
1760 pr_debug("core_tpg_check_initiator_node_acl() failed"
1765 * Now register the TCM vHost virtual I_T Nexus as active with the
1766 * call to __transport_register_session()
1768 __transport_register_session(se_tpg, tv_nexus->tvn_se_sess->se_node_acl,
1769 tv_nexus->tvn_se_sess, tv_nexus);
1770 tpg->tpg_nexus = tv_nexus;
1771 mutex_unlock(&tpg->tpg_mutex);
1775 transport_free_session(tv_nexus->tvn_se_sess);
1779 mutex_unlock(&tpg->tpg_mutex);
1783 static int tcm_usbg_drop_nexus(struct usbg_tpg *tpg)
1785 struct se_session *se_sess;
1786 struct tcm_usbg_nexus *tv_nexus;
1789 mutex_lock(&tpg->tpg_mutex);
1790 tv_nexus = tpg->tpg_nexus;
1794 se_sess = tv_nexus->tvn_se_sess;
1798 if (atomic_read(&tpg->tpg_port_count)) {
1800 pr_err("Unable to remove Host I_T Nexus with"
1801 " active TPG port count: %d\n",
1802 atomic_read(&tpg->tpg_port_count));
1806 pr_debug("Removing I_T Nexus to Initiator Port: %s\n",
1807 tv_nexus->tvn_se_sess->se_node_acl->initiatorname);
1809 * Release the SCSI I_T Nexus to the emulated vHost Target Port
1811 transport_deregister_session(tv_nexus->tvn_se_sess);
1812 tpg->tpg_nexus = NULL;
1816 mutex_unlock(&tpg->tpg_mutex);
1820 static ssize_t tcm_usbg_tpg_store_nexus(
1821 struct se_portal_group *se_tpg,
1825 struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
1826 unsigned char i_port[USBG_NAMELEN], *ptr;
1829 if (!strncmp(page, "NULL", 4)) {
1830 ret = tcm_usbg_drop_nexus(tpg);
1831 return (!ret) ? count : ret;
1833 if (strlen(page) > USBG_NAMELEN) {
1834 pr_err("Emulated NAA Sas Address: %s, exceeds"
1835 " max: %d\n", page, USBG_NAMELEN);
1838 snprintf(i_port, USBG_NAMELEN, "%s", page);
1840 ptr = strstr(i_port, "naa.");
1842 pr_err("Missing 'naa.' prefix\n");
1846 if (i_port[strlen(i_port) - 1] == '\n')
1847 i_port[strlen(i_port) - 1] = '\0';
1849 ret = tcm_usbg_make_nexus(tpg, &i_port[4]);
1854 TF_TPG_BASE_ATTR(tcm_usbg, nexus, S_IRUGO | S_IWUSR);
1856 static struct configfs_attribute *usbg_base_attrs[] = {
1857 &tcm_usbg_tpg_enable.attr,
1858 &tcm_usbg_tpg_nexus.attr,
1862 static int usbg_port_link(struct se_portal_group *se_tpg, struct se_lun *lun)
1864 struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
1866 atomic_inc(&tpg->tpg_port_count);
1867 smp_mb__after_atomic_inc();
1871 static void usbg_port_unlink(struct se_portal_group *se_tpg,
1872 struct se_lun *se_lun)
1874 struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg);
1876 atomic_dec(&tpg->tpg_port_count);
1877 smp_mb__after_atomic_dec();
1880 static int usbg_check_stop_free(struct se_cmd *se_cmd)
1882 struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd,
1885 kref_put(&cmd->ref, usbg_cmd_release);
1889 static struct target_core_fabric_ops usbg_ops = {
1890 .get_fabric_name = usbg_get_fabric_name,
1891 .get_fabric_proto_ident = usbg_get_fabric_proto_ident,
1892 .tpg_get_wwn = usbg_get_fabric_wwn,
1893 .tpg_get_tag = usbg_get_tag,
1894 .tpg_get_default_depth = usbg_get_default_depth,
1895 .tpg_get_pr_transport_id = usbg_get_pr_transport_id,
1896 .tpg_get_pr_transport_id_len = usbg_get_pr_transport_id_len,
1897 .tpg_parse_pr_out_transport_id = usbg_parse_pr_out_transport_id,
1898 .tpg_check_demo_mode = usbg_check_true,
1899 .tpg_check_demo_mode_cache = usbg_check_false,
1900 .tpg_check_demo_mode_write_protect = usbg_check_false,
1901 .tpg_check_prod_mode_write_protect = usbg_check_false,
1902 .tpg_alloc_fabric_acl = usbg_alloc_fabric_acl,
1903 .tpg_release_fabric_acl = usbg_release_fabric_acl,
1904 .tpg_get_inst_index = usbg_tpg_get_inst_index,
1905 .new_cmd_map = usbg_new_cmd,
1906 .release_cmd = usbg_release_cmd,
1907 .shutdown_session = usbg_shutdown_session,
1908 .close_session = usbg_close_session,
1909 .sess_get_index = usbg_sess_get_index,
1910 .sess_get_initiator_sid = NULL,
1911 .write_pending = usbg_send_write_request,
1912 .write_pending_status = usbg_write_pending_status,
1913 .set_default_node_attributes = usbg_set_default_node_attrs,
1914 .get_task_tag = usbg_get_task_tag,
1915 .get_cmd_state = usbg_get_cmd_state,
1916 .queue_data_in = usbg_send_read_response,
1917 .queue_status = usbg_send_status_response,
1918 .queue_tm_rsp = usbg_queue_tm_rsp,
1919 .get_fabric_sense_len = usbg_get_fabric_sense_len,
1920 .set_fabric_sense_len = usbg_set_fabric_sense_len,
1921 .check_stop_free = usbg_check_stop_free,
1923 .fabric_make_wwn = usbg_make_tport,
1924 .fabric_drop_wwn = usbg_drop_tport,
1925 .fabric_make_tpg = usbg_make_tpg,
1926 .fabric_drop_tpg = usbg_drop_tpg,
1927 .fabric_post_link = usbg_port_link,
1928 .fabric_pre_unlink = usbg_port_unlink,
1929 .fabric_make_np = NULL,
1930 .fabric_drop_np = NULL,
1931 .fabric_make_nodeacl = usbg_make_nodeacl,
1932 .fabric_drop_nodeacl = usbg_drop_nodeacl,
1935 static int usbg_register_configfs(void)
1937 struct target_fabric_configfs *fabric;
1940 fabric = target_fabric_configfs_init(THIS_MODULE, "usb_gadget");
1941 if (IS_ERR(fabric)) {
1942 printk(KERN_ERR "target_fabric_configfs_init() failed\n");
1943 return PTR_ERR(fabric);
1946 fabric->tf_ops = usbg_ops;
1947 TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = usbg_wwn_attrs;
1948 TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = usbg_base_attrs;
1949 TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL;
1950 TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL;
1951 TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;
1952 TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL;
1953 TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
1954 TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
1955 TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL;
1956 ret = target_fabric_configfs_register(fabric);
1958 printk(KERN_ERR "target_fabric_configfs_register() failed"
1959 " for usb-gadget\n");
1962 usbg_fabric_configfs = fabric;
1966 static void usbg_deregister_configfs(void)
1968 if (!(usbg_fabric_configfs))
1971 target_fabric_configfs_deregister(usbg_fabric_configfs);
1972 usbg_fabric_configfs = NULL;
1975 /* Start gadget.c code */
1977 static struct usb_interface_descriptor bot_intf_desc = {
1978 .bLength = sizeof(bot_intf_desc),
1979 .bDescriptorType = USB_DT_INTERFACE,
1980 .bAlternateSetting = 0,
1982 .bAlternateSetting = USB_G_ALT_INT_BBB,
1983 .bInterfaceClass = USB_CLASS_MASS_STORAGE,
1984 .bInterfaceSubClass = USB_SC_SCSI,
1985 .bInterfaceProtocol = USB_PR_BULK,
1986 .iInterface = USB_G_STR_INT_UAS,
1989 static struct usb_interface_descriptor uasp_intf_desc = {
1990 .bLength = sizeof(uasp_intf_desc),
1991 .bDescriptorType = USB_DT_INTERFACE,
1993 .bAlternateSetting = USB_G_ALT_INT_UAS,
1994 .bInterfaceClass = USB_CLASS_MASS_STORAGE,
1995 .bInterfaceSubClass = USB_SC_SCSI,
1996 .bInterfaceProtocol = USB_PR_UAS,
1997 .iInterface = USB_G_STR_INT_BBB,
2000 static struct usb_endpoint_descriptor uasp_bi_desc = {
2001 .bLength = USB_DT_ENDPOINT_SIZE,
2002 .bDescriptorType = USB_DT_ENDPOINT,
2003 .bEndpointAddress = USB_DIR_IN,
2004 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2005 .wMaxPacketSize = cpu_to_le16(512),
2008 static struct usb_endpoint_descriptor uasp_fs_bi_desc = {
2009 .bLength = USB_DT_ENDPOINT_SIZE,
2010 .bDescriptorType = USB_DT_ENDPOINT,
2011 .bEndpointAddress = USB_DIR_IN,
2012 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2015 static struct usb_pipe_usage_descriptor uasp_bi_pipe_desc = {
2016 .bLength = sizeof(uasp_bi_pipe_desc),
2017 .bDescriptorType = USB_DT_PIPE_USAGE,
2018 .bPipeID = DATA_IN_PIPE_ID,
2021 static struct usb_endpoint_descriptor uasp_ss_bi_desc = {
2022 .bLength = USB_DT_ENDPOINT_SIZE,
2023 .bDescriptorType = USB_DT_ENDPOINT,
2024 .bEndpointAddress = USB_DIR_IN,
2025 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2026 .wMaxPacketSize = cpu_to_le16(1024),
2029 static struct usb_ss_ep_comp_descriptor uasp_bi_ep_comp_desc = {
2030 .bLength = sizeof(uasp_bi_ep_comp_desc),
2031 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
2033 .bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS,
2034 .wBytesPerInterval = 0,
2037 static struct usb_ss_ep_comp_descriptor bot_bi_ep_comp_desc = {
2038 .bLength = sizeof(bot_bi_ep_comp_desc),
2039 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
2043 static struct usb_endpoint_descriptor uasp_bo_desc = {
2044 .bLength = USB_DT_ENDPOINT_SIZE,
2045 .bDescriptorType = USB_DT_ENDPOINT,
2046 .bEndpointAddress = USB_DIR_OUT,
2047 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2048 .wMaxPacketSize = cpu_to_le16(512),
2051 static struct usb_endpoint_descriptor uasp_fs_bo_desc = {
2052 .bLength = USB_DT_ENDPOINT_SIZE,
2053 .bDescriptorType = USB_DT_ENDPOINT,
2054 .bEndpointAddress = USB_DIR_OUT,
2055 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2058 static struct usb_pipe_usage_descriptor uasp_bo_pipe_desc = {
2059 .bLength = sizeof(uasp_bo_pipe_desc),
2060 .bDescriptorType = USB_DT_PIPE_USAGE,
2061 .bPipeID = DATA_OUT_PIPE_ID,
2064 static struct usb_endpoint_descriptor uasp_ss_bo_desc = {
2065 .bLength = USB_DT_ENDPOINT_SIZE,
2066 .bDescriptorType = USB_DT_ENDPOINT,
2067 .bEndpointAddress = USB_DIR_OUT,
2068 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2069 .wMaxPacketSize = cpu_to_le16(0x400),
2072 static struct usb_ss_ep_comp_descriptor uasp_bo_ep_comp_desc = {
2073 .bLength = sizeof(uasp_bo_ep_comp_desc),
2074 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
2075 .bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS,
2078 static struct usb_ss_ep_comp_descriptor bot_bo_ep_comp_desc = {
2079 .bLength = sizeof(bot_bo_ep_comp_desc),
2080 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
2083 static struct usb_endpoint_descriptor uasp_status_desc = {
2084 .bLength = USB_DT_ENDPOINT_SIZE,
2085 .bDescriptorType = USB_DT_ENDPOINT,
2086 .bEndpointAddress = USB_DIR_IN,
2087 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2088 .wMaxPacketSize = cpu_to_le16(512),
2091 static struct usb_endpoint_descriptor uasp_fs_status_desc = {
2092 .bLength = USB_DT_ENDPOINT_SIZE,
2093 .bDescriptorType = USB_DT_ENDPOINT,
2094 .bEndpointAddress = USB_DIR_IN,
2095 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2098 static struct usb_pipe_usage_descriptor uasp_status_pipe_desc = {
2099 .bLength = sizeof(uasp_status_pipe_desc),
2100 .bDescriptorType = USB_DT_PIPE_USAGE,
2101 .bPipeID = STATUS_PIPE_ID,
2104 static struct usb_endpoint_descriptor uasp_ss_status_desc = {
2105 .bLength = USB_DT_ENDPOINT_SIZE,
2106 .bDescriptorType = USB_DT_ENDPOINT,
2107 .bEndpointAddress = USB_DIR_IN,
2108 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2109 .wMaxPacketSize = cpu_to_le16(1024),
2112 static struct usb_ss_ep_comp_descriptor uasp_status_in_ep_comp_desc = {
2113 .bLength = sizeof(uasp_status_in_ep_comp_desc),
2114 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
2115 .bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS,
2118 static struct usb_endpoint_descriptor uasp_cmd_desc = {
2119 .bLength = USB_DT_ENDPOINT_SIZE,
2120 .bDescriptorType = USB_DT_ENDPOINT,
2121 .bEndpointAddress = USB_DIR_OUT,
2122 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2123 .wMaxPacketSize = cpu_to_le16(512),
2126 static struct usb_endpoint_descriptor uasp_fs_cmd_desc = {
2127 .bLength = USB_DT_ENDPOINT_SIZE,
2128 .bDescriptorType = USB_DT_ENDPOINT,
2129 .bEndpointAddress = USB_DIR_OUT,
2130 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2133 static struct usb_pipe_usage_descriptor uasp_cmd_pipe_desc = {
2134 .bLength = sizeof(uasp_cmd_pipe_desc),
2135 .bDescriptorType = USB_DT_PIPE_USAGE,
2136 .bPipeID = CMD_PIPE_ID,
2139 static struct usb_endpoint_descriptor uasp_ss_cmd_desc = {
2140 .bLength = USB_DT_ENDPOINT_SIZE,
2141 .bDescriptorType = USB_DT_ENDPOINT,
2142 .bEndpointAddress = USB_DIR_OUT,
2143 .bmAttributes = USB_ENDPOINT_XFER_BULK,
2144 .wMaxPacketSize = cpu_to_le16(1024),
2147 static struct usb_ss_ep_comp_descriptor uasp_cmd_comp_desc = {
2148 .bLength = sizeof(uasp_cmd_comp_desc),
2149 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
2152 static struct usb_descriptor_header *uasp_fs_function_desc[] = {
2153 (struct usb_descriptor_header *) &bot_intf_desc,
2154 (struct usb_descriptor_header *) &uasp_fs_bi_desc,
2155 (struct usb_descriptor_header *) &uasp_fs_bo_desc,
2157 (struct usb_descriptor_header *) &uasp_intf_desc,
2158 (struct usb_descriptor_header *) &uasp_fs_bi_desc,
2159 (struct usb_descriptor_header *) &uasp_bi_pipe_desc,
2160 (struct usb_descriptor_header *) &uasp_fs_bo_desc,
2161 (struct usb_descriptor_header *) &uasp_bo_pipe_desc,
2162 (struct usb_descriptor_header *) &uasp_fs_status_desc,
2163 (struct usb_descriptor_header *) &uasp_status_pipe_desc,
2164 (struct usb_descriptor_header *) &uasp_fs_cmd_desc,
2165 (struct usb_descriptor_header *) &uasp_cmd_pipe_desc,
2168 static struct usb_descriptor_header *uasp_hs_function_desc[] = {
2169 (struct usb_descriptor_header *) &bot_intf_desc,
2170 (struct usb_descriptor_header *) &uasp_bi_desc,
2171 (struct usb_descriptor_header *) &uasp_bo_desc,
2173 (struct usb_descriptor_header *) &uasp_intf_desc,
2174 (struct usb_descriptor_header *) &uasp_bi_desc,
2175 (struct usb_descriptor_header *) &uasp_bi_pipe_desc,
2176 (struct usb_descriptor_header *) &uasp_bo_desc,
2177 (struct usb_descriptor_header *) &uasp_bo_pipe_desc,
2178 (struct usb_descriptor_header *) &uasp_status_desc,
2179 (struct usb_descriptor_header *) &uasp_status_pipe_desc,
2180 (struct usb_descriptor_header *) &uasp_cmd_desc,
2181 (struct usb_descriptor_header *) &uasp_cmd_pipe_desc,
2185 static struct usb_descriptor_header *uasp_ss_function_desc[] = {
2186 (struct usb_descriptor_header *) &bot_intf_desc,
2187 (struct usb_descriptor_header *) &uasp_ss_bi_desc,
2188 (struct usb_descriptor_header *) &bot_bi_ep_comp_desc,
2189 (struct usb_descriptor_header *) &uasp_ss_bo_desc,
2190 (struct usb_descriptor_header *) &bot_bo_ep_comp_desc,
2192 (struct usb_descriptor_header *) &uasp_intf_desc,
2193 (struct usb_descriptor_header *) &uasp_ss_bi_desc,
2194 (struct usb_descriptor_header *) &uasp_bi_ep_comp_desc,
2195 (struct usb_descriptor_header *) &uasp_bi_pipe_desc,
2196 (struct usb_descriptor_header *) &uasp_ss_bo_desc,
2197 (struct usb_descriptor_header *) &uasp_bo_ep_comp_desc,
2198 (struct usb_descriptor_header *) &uasp_bo_pipe_desc,
2199 (struct usb_descriptor_header *) &uasp_ss_status_desc,
2200 (struct usb_descriptor_header *) &uasp_status_in_ep_comp_desc,
2201 (struct usb_descriptor_header *) &uasp_status_pipe_desc,
2202 (struct usb_descriptor_header *) &uasp_ss_cmd_desc,
2203 (struct usb_descriptor_header *) &uasp_cmd_comp_desc,
2204 (struct usb_descriptor_header *) &uasp_cmd_pipe_desc,
2208 #define UAS_VENDOR_ID 0x0525 /* NetChip */
2209 #define UAS_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */
2211 static struct usb_device_descriptor usbg_device_desc = {
2212 .bLength = sizeof(usbg_device_desc),
2213 .bDescriptorType = USB_DT_DEVICE,
2214 .bcdUSB = cpu_to_le16(0x0200),
2215 .bDeviceClass = USB_CLASS_PER_INTERFACE,
2216 .idVendor = cpu_to_le16(UAS_VENDOR_ID),
2217 .idProduct = cpu_to_le16(UAS_PRODUCT_ID),
2218 .iManufacturer = USB_G_STR_MANUFACTOR,
2219 .iProduct = USB_G_STR_PRODUCT,
2220 .iSerialNumber = USB_G_STR_SERIAL,
2222 .bNumConfigurations = 1,
2225 static struct usb_string usbg_us_strings[] = {
2226 { USB_G_STR_MANUFACTOR, "Target Manufactor"},
2227 { USB_G_STR_PRODUCT, "Target Product"},
2228 { USB_G_STR_SERIAL, "000000000001"},
2229 { USB_G_STR_CONFIG, "default config"},
2230 { USB_G_STR_INT_UAS, "USB Attached SCSI"},
2231 { USB_G_STR_INT_BBB, "Bulk Only Transport"},
2235 static struct usb_gadget_strings usbg_stringtab = {
2237 .strings = usbg_us_strings,
2240 static struct usb_gadget_strings *usbg_strings[] = {
2245 static int guas_unbind(struct usb_composite_dev *cdev)
2250 static struct usb_configuration usbg_config_driver = {
2251 .label = "Linux Target",
2252 .bConfigurationValue = 1,
2253 .iConfiguration = USB_G_STR_CONFIG,
2254 .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
2257 static void give_back_ep(struct usb_ep **pep)
2259 struct usb_ep *ep = *pep;
2262 ep->driver_data = NULL;
2265 static int usbg_bind(struct usb_configuration *c, struct usb_function *f)
2267 struct f_uas *fu = to_f_uas(f);
2268 struct usb_gadget *gadget = c->cdev->gadget;
2272 iface = usb_interface_id(c, f);
2276 bot_intf_desc.bInterfaceNumber = iface;
2277 uasp_intf_desc.bInterfaceNumber = iface;
2279 ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_bi_desc,
2280 &uasp_bi_ep_comp_desc);
2284 ep->driver_data = fu;
2287 ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_bo_desc,
2288 &uasp_bo_ep_comp_desc);
2291 ep->driver_data = fu;
2294 ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_status_desc,
2295 &uasp_status_in_ep_comp_desc);
2298 ep->driver_data = fu;
2301 ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_cmd_desc,
2302 &uasp_cmd_comp_desc);
2305 ep->driver_data = fu;
2308 /* Assume endpoint addresses are the same for both speeds */
2309 uasp_bi_desc.bEndpointAddress = uasp_ss_bi_desc.bEndpointAddress;
2310 uasp_bo_desc.bEndpointAddress = uasp_ss_bo_desc.bEndpointAddress;
2311 uasp_status_desc.bEndpointAddress =
2312 uasp_ss_status_desc.bEndpointAddress;
2313 uasp_cmd_desc.bEndpointAddress = uasp_ss_cmd_desc.bEndpointAddress;
2315 uasp_fs_bi_desc.bEndpointAddress = uasp_ss_bi_desc.bEndpointAddress;
2316 uasp_fs_bo_desc.bEndpointAddress = uasp_ss_bo_desc.bEndpointAddress;
2317 uasp_fs_status_desc.bEndpointAddress =
2318 uasp_ss_status_desc.bEndpointAddress;
2319 uasp_fs_cmd_desc.bEndpointAddress = uasp_ss_cmd_desc.bEndpointAddress;
2323 pr_err("Can't claim all required eps\n");
2325 give_back_ep(&fu->ep_in);
2326 give_back_ep(&fu->ep_out);
2327 give_back_ep(&fu->ep_status);
2328 give_back_ep(&fu->ep_cmd);
2332 static void usbg_unbind(struct usb_configuration *c, struct usb_function *f)
2334 struct f_uas *fu = to_f_uas(f);
2339 struct guas_setup_wq {
2340 struct work_struct work;
2345 static void usbg_delayed_set_alt(struct work_struct *wq)
2347 struct guas_setup_wq *work = container_of(wq, struct guas_setup_wq,
2349 struct f_uas *fu = work->fu;
2350 int alt = work->alt;
2354 if (fu->flags & USBG_IS_BOT)
2355 bot_cleanup_old_alt(fu);
2356 if (fu->flags & USBG_IS_UAS)
2357 uasp_cleanup_old_alt(fu);
2359 if (alt == USB_G_ALT_INT_BBB)
2361 else if (alt == USB_G_ALT_INT_UAS)
2363 usb_composite_setup_continue(fu->function.config->cdev);
2366 static int usbg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
2368 struct f_uas *fu = to_f_uas(f);
2370 if ((alt == USB_G_ALT_INT_BBB) || (alt == USB_G_ALT_INT_UAS)) {
2371 struct guas_setup_wq *work;
2373 work = kmalloc(sizeof(*work), GFP_ATOMIC);
2376 INIT_WORK(&work->work, usbg_delayed_set_alt);
2379 schedule_work(&work->work);
2380 return USB_GADGET_DELAYED_STATUS;
2385 static void usbg_disable(struct usb_function *f)
2387 struct f_uas *fu = to_f_uas(f);
2389 if (fu->flags & USBG_IS_UAS)
2390 uasp_cleanup_old_alt(fu);
2391 else if (fu->flags & USBG_IS_BOT)
2392 bot_cleanup_old_alt(fu);
2396 static int usbg_setup(struct usb_function *f,
2397 const struct usb_ctrlrequest *ctrl)
2399 struct f_uas *fu = to_f_uas(f);
2401 if (!(fu->flags & USBG_IS_BOT))
2404 return usbg_bot_setup(f, ctrl);
2407 static int usbg_cfg_bind(struct usb_configuration *c)
2412 fu = kzalloc(sizeof(*fu), GFP_KERNEL);
2415 fu->function.name = "Target Function";
2416 fu->function.descriptors = uasp_fs_function_desc;
2417 fu->function.hs_descriptors = uasp_hs_function_desc;
2418 fu->function.ss_descriptors = uasp_ss_function_desc;
2419 fu->function.bind = usbg_bind;
2420 fu->function.unbind = usbg_unbind;
2421 fu->function.set_alt = usbg_set_alt;
2422 fu->function.setup = usbg_setup;
2423 fu->function.disable = usbg_disable;
2424 fu->tpg = the_only_tpg_I_currently_have;
2426 ret = usb_add_function(c, &fu->function);
2436 static int usb_target_bind(struct usb_composite_dev *cdev)
2440 ret = usb_add_config(cdev, &usbg_config_driver,
2445 static struct usb_composite_driver usbg_driver = {
2447 .dev = &usbg_device_desc,
2448 .strings = usbg_strings,
2449 .max_speed = USB_SPEED_SUPER,
2450 .unbind = guas_unbind,
2453 static int usbg_attach(struct usbg_tpg *tpg)
2455 return usb_composite_probe(&usbg_driver, usb_target_bind);
2458 static void usbg_detach(struct usbg_tpg *tpg)
2460 usb_composite_unregister(&usbg_driver);
2463 static int __init usb_target_gadget_init(void)
2467 ret = usbg_register_configfs();
2470 module_init(usb_target_gadget_init);
2472 static void __exit usb_target_gadget_exit(void)
2474 usbg_deregister_configfs();
2476 module_exit(usb_target_gadget_exit);
2478 MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
2479 MODULE_DESCRIPTION("usb-gadget fabric");
2480 MODULE_LICENSE("GPL v2");