Commit | Line | Data |
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c52661d6 SAS |
1 | /* Target based USB-Gadget |
2 | * | |
3 | * UAS protocol handling, target callbacks, configfs handling, | |
4 | * BBB (USB Mass Storage Class Bulk-Only (BBB) and Transport protocol handling. | |
5 | * | |
6 | * Author: Sebastian Andrzej Siewior <bigeasy at linutronix dot de> | |
7 | * License: GPLv2 as published by FSF. | |
8 | */ | |
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> | |
c52661d6 SAS |
19 | #include <scsi/scsi_tcq.h> |
20 | #include <target/target_core_base.h> | |
21 | #include <target/target_core_fabric.h> | |
22 | #include <target/target_core_fabric_configfs.h> | |
c52661d6 SAS |
23 | #include <target/configfs_macros.h> |
24 | #include <asm/unaligned.h> | |
25 | ||
c52661d6 SAS |
26 | #include "tcm_usb_gadget.h" |
27 | ||
7d16e8d3 SAS |
28 | USB_GADGET_COMPOSITE_OPTIONS(); |
29 | ||
c52661d6 SAS |
30 | static inline struct f_uas *to_f_uas(struct usb_function *f) |
31 | { | |
32 | return container_of(f, struct f_uas, function); | |
33 | } | |
34 | ||
35 | static void usbg_cmd_release(struct kref *); | |
36 | ||
37 | static inline void usbg_cleanup_cmd(struct usbg_cmd *cmd) | |
38 | { | |
39 | kref_put(&cmd->ref, usbg_cmd_release); | |
40 | } | |
41 | ||
42 | /* Start bot.c code */ | |
43 | ||
44 | static int bot_enqueue_cmd_cbw(struct f_uas *fu) | |
45 | { | |
46 | int ret; | |
47 | ||
48 | if (fu->flags & USBG_BOT_CMD_PEND) | |
49 | return 0; | |
50 | ||
51 | ret = usb_ep_queue(fu->ep_out, fu->cmd.req, GFP_ATOMIC); | |
52 | if (!ret) | |
53 | fu->flags |= USBG_BOT_CMD_PEND; | |
54 | return ret; | |
55 | } | |
56 | ||
57 | static void bot_status_complete(struct usb_ep *ep, struct usb_request *req) | |
58 | { | |
59 | struct usbg_cmd *cmd = req->context; | |
60 | struct f_uas *fu = cmd->fu; | |
61 | ||
62 | usbg_cleanup_cmd(cmd); | |
63 | if (req->status < 0) { | |
64 | pr_err("ERR %s(%d)\n", __func__, __LINE__); | |
65 | return; | |
66 | } | |
67 | ||
68 | /* CSW completed, wait for next CBW */ | |
69 | bot_enqueue_cmd_cbw(fu); | |
70 | } | |
71 | ||
72 | static void bot_enqueue_sense_code(struct f_uas *fu, struct usbg_cmd *cmd) | |
73 | { | |
74 | struct bulk_cs_wrap *csw = &fu->bot_status.csw; | |
75 | int ret; | |
76 | u8 *sense; | |
77 | unsigned int csw_stat; | |
78 | ||
79 | csw_stat = cmd->csw_code; | |
80 | ||
81 | /* | |
82 | * We can't send SENSE as a response. So we take ASC & ASCQ from our | |
83 | * sense buffer and queue it and hope the host sends a REQUEST_SENSE | |
84 | * command where it learns why we failed. | |
85 | */ | |
86 | sense = cmd->sense_iu.sense; | |
87 | ||
88 | csw->Tag = cmd->bot_tag; | |
89 | csw->Status = csw_stat; | |
90 | fu->bot_status.req->context = cmd; | |
91 | ret = usb_ep_queue(fu->ep_in, fu->bot_status.req, GFP_ATOMIC); | |
92 | if (ret) | |
93 | pr_err("%s(%d) ERR: %d\n", __func__, __LINE__, ret); | |
94 | } | |
95 | ||
96 | static void bot_err_compl(struct usb_ep *ep, struct usb_request *req) | |
97 | { | |
98 | struct usbg_cmd *cmd = req->context; | |
99 | struct f_uas *fu = cmd->fu; | |
100 | ||
101 | if (req->status < 0) | |
102 | pr_err("ERR %s(%d)\n", __func__, __LINE__); | |
103 | ||
104 | if (cmd->data_len) { | |
105 | if (cmd->data_len > ep->maxpacket) { | |
106 | req->length = ep->maxpacket; | |
107 | cmd->data_len -= ep->maxpacket; | |
108 | } else { | |
109 | req->length = cmd->data_len; | |
110 | cmd->data_len = 0; | |
111 | } | |
112 | ||
113 | usb_ep_queue(ep, req, GFP_ATOMIC); | |
114 | return ; | |
115 | } | |
116 | bot_enqueue_sense_code(fu, cmd); | |
117 | } | |
118 | ||
119 | static void bot_send_bad_status(struct usbg_cmd *cmd) | |
120 | { | |
121 | struct f_uas *fu = cmd->fu; | |
122 | struct bulk_cs_wrap *csw = &fu->bot_status.csw; | |
123 | struct usb_request *req; | |
124 | struct usb_ep *ep; | |
125 | ||
126 | csw->Residue = cpu_to_le32(cmd->data_len); | |
127 | ||
128 | if (cmd->data_len) { | |
129 | if (cmd->is_read) { | |
130 | ep = fu->ep_in; | |
131 | req = fu->bot_req_in; | |
132 | } else { | |
133 | ep = fu->ep_out; | |
134 | req = fu->bot_req_out; | |
135 | } | |
136 | ||
137 | if (cmd->data_len > fu->ep_in->maxpacket) { | |
138 | req->length = ep->maxpacket; | |
139 | cmd->data_len -= ep->maxpacket; | |
140 | } else { | |
141 | req->length = cmd->data_len; | |
142 | cmd->data_len = 0; | |
143 | } | |
144 | req->complete = bot_err_compl; | |
145 | req->context = cmd; | |
146 | req->buf = fu->cmd.buf; | |
147 | usb_ep_queue(ep, req, GFP_KERNEL); | |
148 | } else { | |
149 | bot_enqueue_sense_code(fu, cmd); | |
150 | } | |
151 | } | |
152 | ||
153 | static int bot_send_status(struct usbg_cmd *cmd, bool moved_data) | |
154 | { | |
155 | struct f_uas *fu = cmd->fu; | |
156 | struct bulk_cs_wrap *csw = &fu->bot_status.csw; | |
157 | int ret; | |
158 | ||
159 | if (cmd->se_cmd.scsi_status == SAM_STAT_GOOD) { | |
160 | if (!moved_data && cmd->data_len) { | |
161 | /* | |
162 | * the host wants to move data, we don't. Fill / empty | |
163 | * the pipe and then send the csw with reside set. | |
164 | */ | |
165 | cmd->csw_code = US_BULK_STAT_OK; | |
166 | bot_send_bad_status(cmd); | |
167 | return 0; | |
168 | } | |
169 | ||
170 | csw->Tag = cmd->bot_tag; | |
171 | csw->Residue = cpu_to_le32(0); | |
172 | csw->Status = US_BULK_STAT_OK; | |
173 | fu->bot_status.req->context = cmd; | |
174 | ||
175 | ret = usb_ep_queue(fu->ep_in, fu->bot_status.req, GFP_KERNEL); | |
176 | if (ret) | |
177 | pr_err("%s(%d) ERR: %d\n", __func__, __LINE__, ret); | |
178 | } else { | |
179 | cmd->csw_code = US_BULK_STAT_FAIL; | |
180 | bot_send_bad_status(cmd); | |
181 | } | |
182 | return 0; | |
183 | } | |
184 | ||
185 | /* | |
186 | * Called after command (no data transfer) or after the write (to device) | |
187 | * operation is completed | |
188 | */ | |
189 | static int bot_send_status_response(struct usbg_cmd *cmd) | |
190 | { | |
191 | bool moved_data = false; | |
192 | ||
193 | if (!cmd->is_read) | |
194 | moved_data = true; | |
195 | return bot_send_status(cmd, moved_data); | |
196 | } | |
197 | ||
198 | /* Read request completed, now we have to send the CSW */ | |
199 | static void bot_read_compl(struct usb_ep *ep, struct usb_request *req) | |
200 | { | |
201 | struct usbg_cmd *cmd = req->context; | |
202 | ||
203 | if (req->status < 0) | |
204 | pr_err("ERR %s(%d)\n", __func__, __LINE__); | |
205 | ||
206 | bot_send_status(cmd, true); | |
207 | } | |
208 | ||
209 | static int bot_send_read_response(struct usbg_cmd *cmd) | |
210 | { | |
211 | struct f_uas *fu = cmd->fu; | |
212 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
213 | struct usb_gadget *gadget = fuas_to_gadget(fu); | |
214 | int ret; | |
215 | ||
216 | if (!cmd->data_len) { | |
217 | cmd->csw_code = US_BULK_STAT_PHASE; | |
218 | bot_send_bad_status(cmd); | |
219 | return 0; | |
220 | } | |
221 | ||
222 | if (!gadget->sg_supported) { | |
223 | cmd->data_buf = kmalloc(se_cmd->data_length, GFP_ATOMIC); | |
224 | if (!cmd->data_buf) | |
225 | return -ENOMEM; | |
226 | ||
227 | sg_copy_to_buffer(se_cmd->t_data_sg, | |
228 | se_cmd->t_data_nents, | |
229 | cmd->data_buf, | |
230 | se_cmd->data_length); | |
231 | ||
232 | fu->bot_req_in->buf = cmd->data_buf; | |
233 | } else { | |
234 | fu->bot_req_in->buf = NULL; | |
235 | fu->bot_req_in->num_sgs = se_cmd->t_data_nents; | |
236 | fu->bot_req_in->sg = se_cmd->t_data_sg; | |
237 | } | |
238 | ||
239 | fu->bot_req_in->complete = bot_read_compl; | |
240 | fu->bot_req_in->length = se_cmd->data_length; | |
241 | fu->bot_req_in->context = cmd; | |
242 | ret = usb_ep_queue(fu->ep_in, fu->bot_req_in, GFP_ATOMIC); | |
243 | if (ret) | |
244 | pr_err("%s(%d)\n", __func__, __LINE__); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static void usbg_data_write_cmpl(struct usb_ep *, struct usb_request *); | |
249 | static int usbg_prepare_w_request(struct usbg_cmd *, struct usb_request *); | |
250 | ||
251 | static int bot_send_write_request(struct usbg_cmd *cmd) | |
252 | { | |
253 | struct f_uas *fu = cmd->fu; | |
254 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
255 | struct usb_gadget *gadget = fuas_to_gadget(fu); | |
256 | int ret; | |
257 | ||
258 | init_completion(&cmd->write_complete); | |
259 | cmd->fu = fu; | |
260 | ||
261 | if (!cmd->data_len) { | |
262 | cmd->csw_code = US_BULK_STAT_PHASE; | |
263 | return -EINVAL; | |
264 | } | |
265 | ||
266 | if (!gadget->sg_supported) { | |
267 | cmd->data_buf = kmalloc(se_cmd->data_length, GFP_KERNEL); | |
268 | if (!cmd->data_buf) | |
269 | return -ENOMEM; | |
270 | ||
271 | fu->bot_req_out->buf = cmd->data_buf; | |
272 | } else { | |
273 | fu->bot_req_out->buf = NULL; | |
274 | fu->bot_req_out->num_sgs = se_cmd->t_data_nents; | |
275 | fu->bot_req_out->sg = se_cmd->t_data_sg; | |
276 | } | |
277 | ||
278 | fu->bot_req_out->complete = usbg_data_write_cmpl; | |
279 | fu->bot_req_out->length = se_cmd->data_length; | |
280 | fu->bot_req_out->context = cmd; | |
281 | ||
282 | ret = usbg_prepare_w_request(cmd, fu->bot_req_out); | |
283 | if (ret) | |
284 | goto cleanup; | |
285 | ret = usb_ep_queue(fu->ep_out, fu->bot_req_out, GFP_KERNEL); | |
286 | if (ret) | |
287 | pr_err("%s(%d)\n", __func__, __LINE__); | |
288 | ||
289 | wait_for_completion(&cmd->write_complete); | |
70baf0ab | 290 | target_execute_cmd(se_cmd); |
c52661d6 SAS |
291 | cleanup: |
292 | return ret; | |
293 | } | |
294 | ||
295 | static int bot_submit_command(struct f_uas *, void *, unsigned int); | |
296 | ||
297 | static void bot_cmd_complete(struct usb_ep *ep, struct usb_request *req) | |
298 | { | |
299 | struct f_uas *fu = req->context; | |
300 | int ret; | |
301 | ||
302 | fu->flags &= ~USBG_BOT_CMD_PEND; | |
303 | ||
304 | if (req->status < 0) | |
305 | return; | |
306 | ||
307 | ret = bot_submit_command(fu, req->buf, req->actual); | |
308 | if (ret) | |
309 | pr_err("%s(%d): %d\n", __func__, __LINE__, ret); | |
310 | } | |
311 | ||
312 | static int bot_prepare_reqs(struct f_uas *fu) | |
313 | { | |
314 | int ret; | |
315 | ||
316 | fu->bot_req_in = usb_ep_alloc_request(fu->ep_in, GFP_KERNEL); | |
317 | if (!fu->bot_req_in) | |
318 | goto err; | |
319 | ||
320 | fu->bot_req_out = usb_ep_alloc_request(fu->ep_out, GFP_KERNEL); | |
321 | if (!fu->bot_req_out) | |
322 | goto err_out; | |
323 | ||
324 | fu->cmd.req = usb_ep_alloc_request(fu->ep_out, GFP_KERNEL); | |
325 | if (!fu->cmd.req) | |
326 | goto err_cmd; | |
327 | ||
328 | fu->bot_status.req = usb_ep_alloc_request(fu->ep_in, GFP_KERNEL); | |
329 | if (!fu->bot_status.req) | |
330 | goto err_sts; | |
331 | ||
332 | fu->bot_status.req->buf = &fu->bot_status.csw; | |
333 | fu->bot_status.req->length = US_BULK_CS_WRAP_LEN; | |
334 | fu->bot_status.req->complete = bot_status_complete; | |
335 | fu->bot_status.csw.Signature = cpu_to_le32(US_BULK_CS_SIGN); | |
336 | ||
337 | fu->cmd.buf = kmalloc(fu->ep_out->maxpacket, GFP_KERNEL); | |
338 | if (!fu->cmd.buf) | |
339 | goto err_buf; | |
340 | ||
341 | fu->cmd.req->complete = bot_cmd_complete; | |
342 | fu->cmd.req->buf = fu->cmd.buf; | |
343 | fu->cmd.req->length = fu->ep_out->maxpacket; | |
344 | fu->cmd.req->context = fu; | |
345 | ||
346 | ret = bot_enqueue_cmd_cbw(fu); | |
347 | if (ret) | |
348 | goto err_queue; | |
349 | return 0; | |
350 | err_queue: | |
351 | kfree(fu->cmd.buf); | |
352 | fu->cmd.buf = NULL; | |
353 | err_buf: | |
354 | usb_ep_free_request(fu->ep_in, fu->bot_status.req); | |
355 | err_sts: | |
356 | usb_ep_free_request(fu->ep_out, fu->cmd.req); | |
357 | fu->cmd.req = NULL; | |
358 | err_cmd: | |
359 | usb_ep_free_request(fu->ep_out, fu->bot_req_out); | |
360 | fu->bot_req_out = NULL; | |
361 | err_out: | |
362 | usb_ep_free_request(fu->ep_in, fu->bot_req_in); | |
363 | fu->bot_req_in = NULL; | |
364 | err: | |
365 | pr_err("BOT: endpoint setup failed\n"); | |
366 | return -ENOMEM; | |
367 | } | |
368 | ||
3f79265c | 369 | static void bot_cleanup_old_alt(struct f_uas *fu) |
c52661d6 SAS |
370 | { |
371 | if (!(fu->flags & USBG_ENABLED)) | |
372 | return; | |
373 | ||
374 | usb_ep_disable(fu->ep_in); | |
375 | usb_ep_disable(fu->ep_out); | |
376 | ||
377 | if (!fu->bot_req_in) | |
378 | return; | |
379 | ||
380 | usb_ep_free_request(fu->ep_in, fu->bot_req_in); | |
381 | usb_ep_free_request(fu->ep_out, fu->bot_req_out); | |
382 | usb_ep_free_request(fu->ep_out, fu->cmd.req); | |
383 | usb_ep_free_request(fu->ep_out, fu->bot_status.req); | |
384 | ||
385 | kfree(fu->cmd.buf); | |
386 | ||
387 | fu->bot_req_in = NULL; | |
388 | fu->bot_req_out = NULL; | |
389 | fu->cmd.req = NULL; | |
390 | fu->bot_status.req = NULL; | |
391 | fu->cmd.buf = NULL; | |
392 | } | |
393 | ||
394 | static void bot_set_alt(struct f_uas *fu) | |
395 | { | |
396 | struct usb_function *f = &fu->function; | |
397 | struct usb_gadget *gadget = f->config->cdev->gadget; | |
398 | int ret; | |
399 | ||
400 | fu->flags = USBG_IS_BOT; | |
401 | ||
402 | config_ep_by_speed(gadget, f, fu->ep_in); | |
403 | ret = usb_ep_enable(fu->ep_in); | |
404 | if (ret) | |
405 | goto err_b_in; | |
406 | ||
407 | config_ep_by_speed(gadget, f, fu->ep_out); | |
408 | ret = usb_ep_enable(fu->ep_out); | |
409 | if (ret) | |
410 | goto err_b_out; | |
411 | ||
412 | ret = bot_prepare_reqs(fu); | |
413 | if (ret) | |
414 | goto err_wq; | |
415 | fu->flags |= USBG_ENABLED; | |
416 | pr_info("Using the BOT protocol\n"); | |
417 | return; | |
418 | err_wq: | |
419 | usb_ep_disable(fu->ep_out); | |
420 | err_b_out: | |
421 | usb_ep_disable(fu->ep_in); | |
422 | err_b_in: | |
423 | fu->flags = USBG_IS_BOT; | |
424 | } | |
425 | ||
426 | static int usbg_bot_setup(struct usb_function *f, | |
427 | const struct usb_ctrlrequest *ctrl) | |
428 | { | |
429 | struct f_uas *fu = to_f_uas(f); | |
430 | struct usb_composite_dev *cdev = f->config->cdev; | |
431 | u16 w_value = le16_to_cpu(ctrl->wValue); | |
432 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
433 | int luns; | |
434 | u8 *ret_lun; | |
435 | ||
436 | switch (ctrl->bRequest) { | |
437 | case US_BULK_GET_MAX_LUN: | |
438 | if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_CLASS | | |
439 | USB_RECIP_INTERFACE)) | |
440 | return -ENOTSUPP; | |
441 | ||
442 | if (w_length < 1) | |
443 | return -EINVAL; | |
444 | if (w_value != 0) | |
445 | return -EINVAL; | |
446 | luns = atomic_read(&fu->tpg->tpg_port_count); | |
447 | if (!luns) { | |
448 | pr_err("No LUNs configured?\n"); | |
449 | return -EINVAL; | |
450 | } | |
451 | /* | |
452 | * If 4 LUNs are present we return 3 i.e. LUN 0..3 can be | |
453 | * accessed. The upper limit is 0xf | |
454 | */ | |
455 | luns--; | |
456 | if (luns > 0xf) { | |
457 | pr_info_once("Limiting the number of luns to 16\n"); | |
458 | luns = 0xf; | |
459 | } | |
460 | ret_lun = cdev->req->buf; | |
461 | *ret_lun = luns; | |
462 | cdev->req->length = 1; | |
463 | return usb_ep_queue(cdev->gadget->ep0, cdev->req, GFP_ATOMIC); | |
464 | break; | |
465 | ||
466 | case US_BULK_RESET_REQUEST: | |
467 | /* XXX maybe we should remove previous requests for IN + OUT */ | |
468 | bot_enqueue_cmd_cbw(fu); | |
469 | return 0; | |
470 | break; | |
2b84f92b | 471 | } |
c52661d6 SAS |
472 | return -ENOTSUPP; |
473 | } | |
474 | ||
475 | /* Start uas.c code */ | |
476 | ||
477 | static void uasp_cleanup_one_stream(struct f_uas *fu, struct uas_stream *stream) | |
478 | { | |
479 | /* We have either all three allocated or none */ | |
480 | if (!stream->req_in) | |
481 | return; | |
482 | ||
483 | usb_ep_free_request(fu->ep_in, stream->req_in); | |
484 | usb_ep_free_request(fu->ep_out, stream->req_out); | |
485 | usb_ep_free_request(fu->ep_status, stream->req_status); | |
486 | ||
487 | stream->req_in = NULL; | |
488 | stream->req_out = NULL; | |
489 | stream->req_status = NULL; | |
490 | } | |
491 | ||
492 | static void uasp_free_cmdreq(struct f_uas *fu) | |
493 | { | |
494 | usb_ep_free_request(fu->ep_cmd, fu->cmd.req); | |
495 | kfree(fu->cmd.buf); | |
496 | fu->cmd.req = NULL; | |
497 | fu->cmd.buf = NULL; | |
498 | } | |
499 | ||
500 | static void uasp_cleanup_old_alt(struct f_uas *fu) | |
501 | { | |
502 | int i; | |
503 | ||
504 | if (!(fu->flags & USBG_ENABLED)) | |
505 | return; | |
506 | ||
507 | usb_ep_disable(fu->ep_in); | |
508 | usb_ep_disable(fu->ep_out); | |
509 | usb_ep_disable(fu->ep_status); | |
510 | usb_ep_disable(fu->ep_cmd); | |
511 | ||
512 | for (i = 0; i < UASP_SS_EP_COMP_NUM_STREAMS; i++) | |
513 | uasp_cleanup_one_stream(fu, &fu->stream[i]); | |
514 | uasp_free_cmdreq(fu); | |
515 | } | |
516 | ||
517 | static void uasp_status_data_cmpl(struct usb_ep *ep, struct usb_request *req); | |
518 | ||
519 | static int uasp_prepare_r_request(struct usbg_cmd *cmd) | |
520 | { | |
521 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
522 | struct f_uas *fu = cmd->fu; | |
523 | struct usb_gadget *gadget = fuas_to_gadget(fu); | |
524 | struct uas_stream *stream = cmd->stream; | |
525 | ||
526 | if (!gadget->sg_supported) { | |
527 | cmd->data_buf = kmalloc(se_cmd->data_length, GFP_ATOMIC); | |
528 | if (!cmd->data_buf) | |
529 | return -ENOMEM; | |
530 | ||
531 | sg_copy_to_buffer(se_cmd->t_data_sg, | |
532 | se_cmd->t_data_nents, | |
533 | cmd->data_buf, | |
534 | se_cmd->data_length); | |
535 | ||
536 | stream->req_in->buf = cmd->data_buf; | |
537 | } else { | |
538 | stream->req_in->buf = NULL; | |
539 | stream->req_in->num_sgs = se_cmd->t_data_nents; | |
540 | stream->req_in->sg = se_cmd->t_data_sg; | |
541 | } | |
542 | ||
543 | stream->req_in->complete = uasp_status_data_cmpl; | |
544 | stream->req_in->length = se_cmd->data_length; | |
545 | stream->req_in->context = cmd; | |
546 | ||
547 | cmd->state = UASP_SEND_STATUS; | |
548 | return 0; | |
549 | } | |
550 | ||
551 | static void uasp_prepare_status(struct usbg_cmd *cmd) | |
552 | { | |
553 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
554 | struct sense_iu *iu = &cmd->sense_iu; | |
555 | struct uas_stream *stream = cmd->stream; | |
556 | ||
557 | cmd->state = UASP_QUEUE_COMMAND; | |
558 | iu->iu_id = IU_ID_STATUS; | |
559 | iu->tag = cpu_to_be16(cmd->tag); | |
560 | ||
561 | /* | |
562 | * iu->status_qual = cpu_to_be16(STATUS QUALIFIER SAM-4. Where R U?); | |
563 | */ | |
564 | iu->len = cpu_to_be16(se_cmd->scsi_sense_length); | |
565 | iu->status = se_cmd->scsi_status; | |
566 | stream->req_status->context = cmd; | |
567 | stream->req_status->length = se_cmd->scsi_sense_length + 16; | |
568 | stream->req_status->buf = iu; | |
569 | stream->req_status->complete = uasp_status_data_cmpl; | |
570 | } | |
571 | ||
572 | static void uasp_status_data_cmpl(struct usb_ep *ep, struct usb_request *req) | |
573 | { | |
574 | struct usbg_cmd *cmd = req->context; | |
575 | struct uas_stream *stream = cmd->stream; | |
576 | struct f_uas *fu = cmd->fu; | |
577 | int ret; | |
578 | ||
579 | if (req->status < 0) | |
580 | goto cleanup; | |
581 | ||
582 | switch (cmd->state) { | |
583 | case UASP_SEND_DATA: | |
584 | ret = uasp_prepare_r_request(cmd); | |
585 | if (ret) | |
586 | goto cleanup; | |
587 | ret = usb_ep_queue(fu->ep_in, stream->req_in, GFP_ATOMIC); | |
588 | if (ret) | |
589 | pr_err("%s(%d) => %d\n", __func__, __LINE__, ret); | |
590 | break; | |
591 | ||
592 | case UASP_RECEIVE_DATA: | |
593 | ret = usbg_prepare_w_request(cmd, stream->req_out); | |
594 | if (ret) | |
595 | goto cleanup; | |
596 | ret = usb_ep_queue(fu->ep_out, stream->req_out, GFP_ATOMIC); | |
597 | if (ret) | |
598 | pr_err("%s(%d) => %d\n", __func__, __LINE__, ret); | |
599 | break; | |
600 | ||
601 | case UASP_SEND_STATUS: | |
602 | uasp_prepare_status(cmd); | |
603 | ret = usb_ep_queue(fu->ep_status, stream->req_status, | |
604 | GFP_ATOMIC); | |
605 | if (ret) | |
606 | pr_err("%s(%d) => %d\n", __func__, __LINE__, ret); | |
607 | break; | |
608 | ||
609 | case UASP_QUEUE_COMMAND: | |
610 | usbg_cleanup_cmd(cmd); | |
611 | usb_ep_queue(fu->ep_cmd, fu->cmd.req, GFP_ATOMIC); | |
612 | break; | |
613 | ||
614 | default: | |
615 | BUG(); | |
2b84f92b | 616 | } |
c52661d6 SAS |
617 | return; |
618 | ||
619 | cleanup: | |
620 | usbg_cleanup_cmd(cmd); | |
621 | } | |
622 | ||
623 | static int uasp_send_status_response(struct usbg_cmd *cmd) | |
624 | { | |
625 | struct f_uas *fu = cmd->fu; | |
626 | struct uas_stream *stream = cmd->stream; | |
627 | struct sense_iu *iu = &cmd->sense_iu; | |
628 | ||
629 | iu->tag = cpu_to_be16(cmd->tag); | |
630 | stream->req_status->complete = uasp_status_data_cmpl; | |
631 | stream->req_status->context = cmd; | |
632 | cmd->fu = fu; | |
633 | uasp_prepare_status(cmd); | |
634 | return usb_ep_queue(fu->ep_status, stream->req_status, GFP_ATOMIC); | |
635 | } | |
636 | ||
637 | static int uasp_send_read_response(struct usbg_cmd *cmd) | |
638 | { | |
639 | struct f_uas *fu = cmd->fu; | |
640 | struct uas_stream *stream = cmd->stream; | |
641 | struct sense_iu *iu = &cmd->sense_iu; | |
642 | int ret; | |
643 | ||
644 | cmd->fu = fu; | |
645 | ||
646 | iu->tag = cpu_to_be16(cmd->tag); | |
647 | if (fu->flags & USBG_USE_STREAMS) { | |
648 | ||
649 | ret = uasp_prepare_r_request(cmd); | |
650 | if (ret) | |
651 | goto out; | |
652 | ret = usb_ep_queue(fu->ep_in, stream->req_in, GFP_ATOMIC); | |
653 | if (ret) { | |
654 | pr_err("%s(%d) => %d\n", __func__, __LINE__, ret); | |
655 | kfree(cmd->data_buf); | |
656 | cmd->data_buf = NULL; | |
657 | } | |
658 | ||
659 | } else { | |
660 | ||
661 | iu->iu_id = IU_ID_READ_READY; | |
662 | iu->tag = cpu_to_be16(cmd->tag); | |
663 | ||
664 | stream->req_status->complete = uasp_status_data_cmpl; | |
665 | stream->req_status->context = cmd; | |
666 | ||
667 | cmd->state = UASP_SEND_DATA; | |
668 | stream->req_status->buf = iu; | |
669 | stream->req_status->length = sizeof(struct iu); | |
670 | ||
671 | ret = usb_ep_queue(fu->ep_status, stream->req_status, | |
672 | GFP_ATOMIC); | |
673 | if (ret) | |
674 | pr_err("%s(%d) => %d\n", __func__, __LINE__, ret); | |
675 | } | |
676 | out: | |
677 | return ret; | |
678 | } | |
679 | ||
680 | static int uasp_send_write_request(struct usbg_cmd *cmd) | |
681 | { | |
682 | struct f_uas *fu = cmd->fu; | |
683 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
684 | struct uas_stream *stream = cmd->stream; | |
685 | struct sense_iu *iu = &cmd->sense_iu; | |
686 | int ret; | |
687 | ||
688 | init_completion(&cmd->write_complete); | |
689 | cmd->fu = fu; | |
690 | ||
691 | iu->tag = cpu_to_be16(cmd->tag); | |
692 | ||
693 | if (fu->flags & USBG_USE_STREAMS) { | |
694 | ||
695 | ret = usbg_prepare_w_request(cmd, stream->req_out); | |
696 | if (ret) | |
697 | goto cleanup; | |
698 | ret = usb_ep_queue(fu->ep_out, stream->req_out, GFP_ATOMIC); | |
699 | if (ret) | |
700 | pr_err("%s(%d)\n", __func__, __LINE__); | |
701 | ||
702 | } else { | |
703 | ||
704 | iu->iu_id = IU_ID_WRITE_READY; | |
705 | iu->tag = cpu_to_be16(cmd->tag); | |
706 | ||
707 | stream->req_status->complete = uasp_status_data_cmpl; | |
708 | stream->req_status->context = cmd; | |
709 | ||
710 | cmd->state = UASP_RECEIVE_DATA; | |
711 | stream->req_status->buf = iu; | |
712 | stream->req_status->length = sizeof(struct iu); | |
713 | ||
714 | ret = usb_ep_queue(fu->ep_status, stream->req_status, | |
715 | GFP_ATOMIC); | |
716 | if (ret) | |
717 | pr_err("%s(%d)\n", __func__, __LINE__); | |
718 | } | |
719 | ||
720 | wait_for_completion(&cmd->write_complete); | |
70baf0ab | 721 | target_execute_cmd(se_cmd); |
c52661d6 SAS |
722 | cleanup: |
723 | return ret; | |
724 | } | |
725 | ||
726 | static int usbg_submit_command(struct f_uas *, void *, unsigned int); | |
727 | ||
728 | static void uasp_cmd_complete(struct usb_ep *ep, struct usb_request *req) | |
729 | { | |
730 | struct f_uas *fu = req->context; | |
731 | int ret; | |
732 | ||
733 | if (req->status < 0) | |
734 | return; | |
735 | ||
736 | ret = usbg_submit_command(fu, req->buf, req->actual); | |
737 | /* | |
738 | * Once we tune for performance enqueue the command req here again so | |
739 | * we can receive a second command while we processing this one. Pay | |
740 | * attention to properly sync STAUS endpoint with DATA IN + OUT so you | |
741 | * don't break HS. | |
742 | */ | |
743 | if (!ret) | |
744 | return; | |
745 | usb_ep_queue(fu->ep_cmd, fu->cmd.req, GFP_ATOMIC); | |
746 | } | |
747 | ||
748 | static int uasp_alloc_stream_res(struct f_uas *fu, struct uas_stream *stream) | |
749 | { | |
750 | stream->req_in = usb_ep_alloc_request(fu->ep_in, GFP_KERNEL); | |
751 | if (!stream->req_in) | |
752 | goto out; | |
753 | ||
754 | stream->req_out = usb_ep_alloc_request(fu->ep_out, GFP_KERNEL); | |
755 | if (!stream->req_out) | |
756 | goto err_out; | |
757 | ||
758 | stream->req_status = usb_ep_alloc_request(fu->ep_status, GFP_KERNEL); | |
759 | if (!stream->req_status) | |
760 | goto err_sts; | |
761 | ||
762 | return 0; | |
763 | err_sts: | |
764 | usb_ep_free_request(fu->ep_status, stream->req_status); | |
765 | stream->req_status = NULL; | |
766 | err_out: | |
767 | usb_ep_free_request(fu->ep_out, stream->req_out); | |
768 | stream->req_out = NULL; | |
769 | out: | |
770 | return -ENOMEM; | |
771 | } | |
772 | ||
773 | static int uasp_alloc_cmd(struct f_uas *fu) | |
774 | { | |
775 | fu->cmd.req = usb_ep_alloc_request(fu->ep_cmd, GFP_KERNEL); | |
776 | if (!fu->cmd.req) | |
777 | goto err; | |
778 | ||
779 | fu->cmd.buf = kmalloc(fu->ep_cmd->maxpacket, GFP_KERNEL); | |
780 | if (!fu->cmd.buf) | |
781 | goto err_buf; | |
782 | ||
783 | fu->cmd.req->complete = uasp_cmd_complete; | |
784 | fu->cmd.req->buf = fu->cmd.buf; | |
785 | fu->cmd.req->length = fu->ep_cmd->maxpacket; | |
786 | fu->cmd.req->context = fu; | |
787 | return 0; | |
788 | ||
789 | err_buf: | |
790 | usb_ep_free_request(fu->ep_cmd, fu->cmd.req); | |
791 | err: | |
792 | return -ENOMEM; | |
793 | } | |
794 | ||
795 | static void uasp_setup_stream_res(struct f_uas *fu, int max_streams) | |
796 | { | |
797 | int i; | |
798 | ||
799 | for (i = 0; i < max_streams; i++) { | |
800 | struct uas_stream *s = &fu->stream[i]; | |
801 | ||
802 | s->req_in->stream_id = i + 1; | |
803 | s->req_out->stream_id = i + 1; | |
804 | s->req_status->stream_id = i + 1; | |
805 | } | |
806 | } | |
807 | ||
808 | static int uasp_prepare_reqs(struct f_uas *fu) | |
809 | { | |
810 | int ret; | |
811 | int i; | |
812 | int max_streams; | |
813 | ||
814 | if (fu->flags & USBG_USE_STREAMS) | |
815 | max_streams = UASP_SS_EP_COMP_NUM_STREAMS; | |
816 | else | |
817 | max_streams = 1; | |
818 | ||
819 | for (i = 0; i < max_streams; i++) { | |
820 | ret = uasp_alloc_stream_res(fu, &fu->stream[i]); | |
821 | if (ret) | |
822 | goto err_cleanup; | |
823 | } | |
824 | ||
825 | ret = uasp_alloc_cmd(fu); | |
826 | if (ret) | |
827 | goto err_free_stream; | |
828 | uasp_setup_stream_res(fu, max_streams); | |
829 | ||
830 | ret = usb_ep_queue(fu->ep_cmd, fu->cmd.req, GFP_ATOMIC); | |
831 | if (ret) | |
832 | goto err_free_stream; | |
833 | ||
834 | return 0; | |
835 | ||
836 | err_free_stream: | |
837 | uasp_free_cmdreq(fu); | |
838 | ||
839 | err_cleanup: | |
840 | if (i) { | |
841 | do { | |
842 | uasp_cleanup_one_stream(fu, &fu->stream[i - 1]); | |
843 | i--; | |
844 | } while (i); | |
845 | } | |
846 | pr_err("UASP: endpoint setup failed\n"); | |
847 | return ret; | |
848 | } | |
849 | ||
850 | static void uasp_set_alt(struct f_uas *fu) | |
851 | { | |
852 | struct usb_function *f = &fu->function; | |
853 | struct usb_gadget *gadget = f->config->cdev->gadget; | |
854 | int ret; | |
855 | ||
856 | fu->flags = USBG_IS_UAS; | |
857 | ||
858 | if (gadget->speed == USB_SPEED_SUPER) | |
859 | fu->flags |= USBG_USE_STREAMS; | |
860 | ||
861 | config_ep_by_speed(gadget, f, fu->ep_in); | |
862 | ret = usb_ep_enable(fu->ep_in); | |
863 | if (ret) | |
864 | goto err_b_in; | |
865 | ||
866 | config_ep_by_speed(gadget, f, fu->ep_out); | |
867 | ret = usb_ep_enable(fu->ep_out); | |
868 | if (ret) | |
869 | goto err_b_out; | |
870 | ||
871 | config_ep_by_speed(gadget, f, fu->ep_cmd); | |
872 | ret = usb_ep_enable(fu->ep_cmd); | |
873 | if (ret) | |
874 | goto err_cmd; | |
875 | config_ep_by_speed(gadget, f, fu->ep_status); | |
876 | ret = usb_ep_enable(fu->ep_status); | |
877 | if (ret) | |
878 | goto err_status; | |
879 | ||
880 | ret = uasp_prepare_reqs(fu); | |
881 | if (ret) | |
882 | goto err_wq; | |
883 | fu->flags |= USBG_ENABLED; | |
884 | ||
885 | pr_info("Using the UAS protocol\n"); | |
886 | return; | |
887 | err_wq: | |
888 | usb_ep_disable(fu->ep_status); | |
889 | err_status: | |
890 | usb_ep_disable(fu->ep_cmd); | |
891 | err_cmd: | |
892 | usb_ep_disable(fu->ep_out); | |
893 | err_b_out: | |
894 | usb_ep_disable(fu->ep_in); | |
895 | err_b_in: | |
896 | fu->flags = 0; | |
897 | } | |
898 | ||
899 | static int get_cmd_dir(const unsigned char *cdb) | |
900 | { | |
901 | int ret; | |
902 | ||
903 | switch (cdb[0]) { | |
904 | case READ_6: | |
905 | case READ_10: | |
906 | case READ_12: | |
907 | case READ_16: | |
908 | case INQUIRY: | |
909 | case MODE_SENSE: | |
910 | case MODE_SENSE_10: | |
eb846d9f | 911 | case SERVICE_ACTION_IN_16: |
c52661d6 SAS |
912 | case MAINTENANCE_IN: |
913 | case PERSISTENT_RESERVE_IN: | |
914 | case SECURITY_PROTOCOL_IN: | |
915 | case ACCESS_CONTROL_IN: | |
916 | case REPORT_LUNS: | |
917 | case READ_BLOCK_LIMITS: | |
918 | case READ_POSITION: | |
919 | case READ_CAPACITY: | |
920 | case READ_TOC: | |
921 | case READ_FORMAT_CAPACITIES: | |
922 | case REQUEST_SENSE: | |
923 | ret = DMA_FROM_DEVICE; | |
924 | break; | |
925 | ||
926 | case WRITE_6: | |
927 | case WRITE_10: | |
928 | case WRITE_12: | |
929 | case WRITE_16: | |
930 | case MODE_SELECT: | |
931 | case MODE_SELECT_10: | |
932 | case WRITE_VERIFY: | |
933 | case WRITE_VERIFY_12: | |
934 | case PERSISTENT_RESERVE_OUT: | |
935 | case MAINTENANCE_OUT: | |
936 | case SECURITY_PROTOCOL_OUT: | |
937 | case ACCESS_CONTROL_OUT: | |
938 | ret = DMA_TO_DEVICE; | |
939 | break; | |
940 | case ALLOW_MEDIUM_REMOVAL: | |
941 | case TEST_UNIT_READY: | |
942 | case SYNCHRONIZE_CACHE: | |
943 | case START_STOP: | |
944 | case ERASE: | |
945 | case REZERO_UNIT: | |
946 | case SEEK_10: | |
947 | case SPACE: | |
948 | case VERIFY: | |
949 | case WRITE_FILEMARKS: | |
950 | ret = DMA_NONE; | |
951 | break; | |
952 | default: | |
953 | pr_warn("target: Unknown data direction for SCSI Opcode " | |
954 | "0x%02x\n", cdb[0]); | |
955 | ret = -EINVAL; | |
956 | } | |
957 | return ret; | |
958 | } | |
959 | ||
960 | static void usbg_data_write_cmpl(struct usb_ep *ep, struct usb_request *req) | |
961 | { | |
962 | struct usbg_cmd *cmd = req->context; | |
963 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
964 | ||
965 | if (req->status < 0) { | |
966 | pr_err("%s() state %d transfer failed\n", __func__, cmd->state); | |
967 | goto cleanup; | |
968 | } | |
969 | ||
970 | if (req->num_sgs == 0) { | |
971 | sg_copy_from_buffer(se_cmd->t_data_sg, | |
972 | se_cmd->t_data_nents, | |
973 | cmd->data_buf, | |
974 | se_cmd->data_length); | |
975 | } | |
976 | ||
977 | complete(&cmd->write_complete); | |
978 | return; | |
979 | ||
980 | cleanup: | |
981 | usbg_cleanup_cmd(cmd); | |
982 | } | |
983 | ||
984 | static int usbg_prepare_w_request(struct usbg_cmd *cmd, struct usb_request *req) | |
985 | { | |
986 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
987 | struct f_uas *fu = cmd->fu; | |
988 | struct usb_gadget *gadget = fuas_to_gadget(fu); | |
989 | ||
990 | if (!gadget->sg_supported) { | |
991 | cmd->data_buf = kmalloc(se_cmd->data_length, GFP_ATOMIC); | |
992 | if (!cmd->data_buf) | |
993 | return -ENOMEM; | |
994 | ||
995 | req->buf = cmd->data_buf; | |
996 | } else { | |
997 | req->buf = NULL; | |
998 | req->num_sgs = se_cmd->t_data_nents; | |
999 | req->sg = se_cmd->t_data_sg; | |
1000 | } | |
1001 | ||
1002 | req->complete = usbg_data_write_cmpl; | |
1003 | req->length = se_cmd->data_length; | |
1004 | req->context = cmd; | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | static int usbg_send_status_response(struct se_cmd *se_cmd) | |
1009 | { | |
1010 | struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd, | |
1011 | se_cmd); | |
1012 | struct f_uas *fu = cmd->fu; | |
1013 | ||
1014 | if (fu->flags & USBG_IS_BOT) | |
1015 | return bot_send_status_response(cmd); | |
1016 | else | |
1017 | return uasp_send_status_response(cmd); | |
1018 | } | |
1019 | ||
1020 | static int usbg_send_write_request(struct se_cmd *se_cmd) | |
1021 | { | |
1022 | struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd, | |
1023 | se_cmd); | |
1024 | struct f_uas *fu = cmd->fu; | |
1025 | ||
1026 | if (fu->flags & USBG_IS_BOT) | |
1027 | return bot_send_write_request(cmd); | |
1028 | else | |
1029 | return uasp_send_write_request(cmd); | |
1030 | } | |
1031 | ||
1032 | static int usbg_send_read_response(struct se_cmd *se_cmd) | |
1033 | { | |
1034 | struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd, | |
1035 | se_cmd); | |
1036 | struct f_uas *fu = cmd->fu; | |
1037 | ||
1038 | if (fu->flags & USBG_IS_BOT) | |
1039 | return bot_send_read_response(cmd); | |
1040 | else | |
1041 | return uasp_send_read_response(cmd); | |
1042 | } | |
1043 | ||
1044 | static void usbg_cmd_work(struct work_struct *work) | |
1045 | { | |
1046 | struct usbg_cmd *cmd = container_of(work, struct usbg_cmd, work); | |
1047 | struct se_cmd *se_cmd; | |
1048 | struct tcm_usbg_nexus *tv_nexus; | |
1049 | struct usbg_tpg *tpg; | |
1050 | int dir; | |
1051 | ||
1052 | se_cmd = &cmd->se_cmd; | |
1053 | tpg = cmd->fu->tpg; | |
1054 | tv_nexus = tpg->tpg_nexus; | |
1055 | dir = get_cmd_dir(cmd->cmd_buf); | |
1056 | if (dir < 0) { | |
1057 | transport_init_se_cmd(se_cmd, | |
1058 | tv_nexus->tvn_se_sess->se_tpg->se_tpg_tfo, | |
1059 | tv_nexus->tvn_se_sess, cmd->data_len, DMA_NONE, | |
1060 | cmd->prio_attr, cmd->sense_iu.sense); | |
d6dfc868 | 1061 | goto out; |
c52661d6 SAS |
1062 | } |
1063 | ||
d6dfc868 | 1064 | if (target_submit_cmd(se_cmd, tv_nexus->tvn_se_sess, |
c52661d6 | 1065 | cmd->cmd_buf, cmd->sense_iu.sense, cmd->unpacked_lun, |
d6dfc868 RD |
1066 | 0, cmd->prio_attr, dir, TARGET_SCF_UNKNOWN_SIZE) < 0) |
1067 | goto out; | |
1068 | ||
1069 | return; | |
1070 | ||
1071 | out: | |
1072 | transport_send_check_condition_and_sense(se_cmd, | |
1073 | TCM_UNSUPPORTED_SCSI_OPCODE, 1); | |
1074 | usbg_cleanup_cmd(cmd); | |
c52661d6 SAS |
1075 | } |
1076 | ||
1077 | static int usbg_submit_command(struct f_uas *fu, | |
1078 | void *cmdbuf, unsigned int len) | |
1079 | { | |
1080 | struct command_iu *cmd_iu = cmdbuf; | |
1081 | struct usbg_cmd *cmd; | |
1082 | struct usbg_tpg *tpg; | |
1083 | struct se_cmd *se_cmd; | |
1084 | struct tcm_usbg_nexus *tv_nexus; | |
1085 | u32 cmd_len; | |
1086 | int ret; | |
1087 | ||
1088 | if (cmd_iu->iu_id != IU_ID_COMMAND) { | |
1089 | pr_err("Unsupported type %d\n", cmd_iu->iu_id); | |
1090 | return -EINVAL; | |
1091 | } | |
1092 | ||
1093 | cmd = kzalloc(sizeof *cmd, GFP_ATOMIC); | |
1094 | if (!cmd) | |
1095 | return -ENOMEM; | |
1096 | ||
1097 | cmd->fu = fu; | |
1098 | ||
1099 | /* XXX until I figure out why I can't free in on complete */ | |
1100 | kref_init(&cmd->ref); | |
1101 | kref_get(&cmd->ref); | |
1102 | ||
1103 | tpg = fu->tpg; | |
1104 | cmd_len = (cmd_iu->len & ~0x3) + 16; | |
1105 | if (cmd_len > USBG_MAX_CMD) | |
1106 | goto err; | |
1107 | ||
1108 | memcpy(cmd->cmd_buf, cmd_iu->cdb, cmd_len); | |
1109 | ||
1110 | cmd->tag = be16_to_cpup(&cmd_iu->tag); | |
649ee054 | 1111 | cmd->se_cmd.tag = cmd->tag; |
c52661d6 SAS |
1112 | if (fu->flags & USBG_USE_STREAMS) { |
1113 | if (cmd->tag > UASP_SS_EP_COMP_NUM_STREAMS) | |
1114 | goto err; | |
1115 | if (!cmd->tag) | |
1116 | cmd->stream = &fu->stream[0]; | |
1117 | else | |
1118 | cmd->stream = &fu->stream[cmd->tag - 1]; | |
1119 | } else { | |
1120 | cmd->stream = &fu->stream[0]; | |
1121 | } | |
1122 | ||
1123 | tv_nexus = tpg->tpg_nexus; | |
1124 | if (!tv_nexus) { | |
1125 | pr_err("Missing nexus, ignoring command\n"); | |
1126 | goto err; | |
1127 | } | |
1128 | ||
1129 | switch (cmd_iu->prio_attr & 0x7) { | |
1130 | case UAS_HEAD_TAG: | |
68d81f40 | 1131 | cmd->prio_attr = TCM_HEAD_TAG; |
c52661d6 SAS |
1132 | break; |
1133 | case UAS_ORDERED_TAG: | |
68d81f40 | 1134 | cmd->prio_attr = TCM_ORDERED_TAG; |
c52661d6 SAS |
1135 | break; |
1136 | case UAS_ACA: | |
68d81f40 | 1137 | cmd->prio_attr = TCM_ACA_TAG; |
c52661d6 SAS |
1138 | break; |
1139 | default: | |
1140 | pr_debug_once("Unsupported prio_attr: %02x.\n", | |
1141 | cmd_iu->prio_attr); | |
1142 | case UAS_SIMPLE_TAG: | |
68d81f40 | 1143 | cmd->prio_attr = TCM_SIMPLE_TAG; |
c52661d6 SAS |
1144 | break; |
1145 | } | |
1146 | ||
1147 | se_cmd = &cmd->se_cmd; | |
1148 | cmd->unpacked_lun = scsilun_to_int(&cmd_iu->lun); | |
1149 | ||
1150 | INIT_WORK(&cmd->work, usbg_cmd_work); | |
1151 | ret = queue_work(tpg->workqueue, &cmd->work); | |
1152 | if (ret < 0) | |
1153 | goto err; | |
1154 | ||
1155 | return 0; | |
1156 | err: | |
1157 | kfree(cmd); | |
1158 | return -EINVAL; | |
1159 | } | |
1160 | ||
1161 | static void bot_cmd_work(struct work_struct *work) | |
1162 | { | |
1163 | struct usbg_cmd *cmd = container_of(work, struct usbg_cmd, work); | |
1164 | struct se_cmd *se_cmd; | |
1165 | struct tcm_usbg_nexus *tv_nexus; | |
1166 | struct usbg_tpg *tpg; | |
1167 | int dir; | |
1168 | ||
1169 | se_cmd = &cmd->se_cmd; | |
1170 | tpg = cmd->fu->tpg; | |
1171 | tv_nexus = tpg->tpg_nexus; | |
1172 | dir = get_cmd_dir(cmd->cmd_buf); | |
1173 | if (dir < 0) { | |
1174 | transport_init_se_cmd(se_cmd, | |
1175 | tv_nexus->tvn_se_sess->se_tpg->se_tpg_tfo, | |
1176 | tv_nexus->tvn_se_sess, cmd->data_len, DMA_NONE, | |
1177 | cmd->prio_attr, cmd->sense_iu.sense); | |
d6dfc868 | 1178 | goto out; |
c52661d6 SAS |
1179 | } |
1180 | ||
d6dfc868 | 1181 | if (target_submit_cmd(se_cmd, tv_nexus->tvn_se_sess, |
c52661d6 | 1182 | cmd->cmd_buf, cmd->sense_iu.sense, cmd->unpacked_lun, |
d6dfc868 RD |
1183 | cmd->data_len, cmd->prio_attr, dir, 0) < 0) |
1184 | goto out; | |
1185 | ||
1186 | return; | |
1187 | ||
1188 | out: | |
1189 | transport_send_check_condition_and_sense(se_cmd, | |
1190 | TCM_UNSUPPORTED_SCSI_OPCODE, 1); | |
1191 | usbg_cleanup_cmd(cmd); | |
c52661d6 SAS |
1192 | } |
1193 | ||
1194 | static int bot_submit_command(struct f_uas *fu, | |
1195 | void *cmdbuf, unsigned int len) | |
1196 | { | |
1197 | struct bulk_cb_wrap *cbw = cmdbuf; | |
1198 | struct usbg_cmd *cmd; | |
1199 | struct usbg_tpg *tpg; | |
1200 | struct se_cmd *se_cmd; | |
1201 | struct tcm_usbg_nexus *tv_nexus; | |
1202 | u32 cmd_len; | |
1203 | int ret; | |
1204 | ||
1205 | if (cbw->Signature != cpu_to_le32(US_BULK_CB_SIGN)) { | |
1206 | pr_err("Wrong signature on CBW\n"); | |
1207 | return -EINVAL; | |
1208 | } | |
1209 | if (len != 31) { | |
1210 | pr_err("Wrong length for CBW\n"); | |
1211 | return -EINVAL; | |
1212 | } | |
1213 | ||
1214 | cmd_len = cbw->Length; | |
1215 | if (cmd_len < 1 || cmd_len > 16) | |
1216 | return -EINVAL; | |
1217 | ||
1218 | cmd = kzalloc(sizeof *cmd, GFP_ATOMIC); | |
1219 | if (!cmd) | |
1220 | return -ENOMEM; | |
1221 | ||
1222 | cmd->fu = fu; | |
1223 | ||
1224 | /* XXX until I figure out why I can't free in on complete */ | |
1225 | kref_init(&cmd->ref); | |
1226 | kref_get(&cmd->ref); | |
1227 | ||
1228 | tpg = fu->tpg; | |
1229 | ||
1230 | memcpy(cmd->cmd_buf, cbw->CDB, cmd_len); | |
1231 | ||
1232 | cmd->bot_tag = cbw->Tag; | |
1233 | ||
1234 | tv_nexus = tpg->tpg_nexus; | |
1235 | if (!tv_nexus) { | |
1236 | pr_err("Missing nexus, ignoring command\n"); | |
1237 | goto err; | |
1238 | } | |
1239 | ||
68d81f40 | 1240 | cmd->prio_attr = TCM_SIMPLE_TAG; |
c52661d6 SAS |
1241 | se_cmd = &cmd->se_cmd; |
1242 | cmd->unpacked_lun = cbw->Lun; | |
1243 | cmd->is_read = cbw->Flags & US_BULK_FLAG_IN ? 1 : 0; | |
1244 | cmd->data_len = le32_to_cpu(cbw->DataTransferLength); | |
649ee054 | 1245 | cmd->se_cmd.tag = le32_to_cpu(cmd->bot_tag); |
c52661d6 SAS |
1246 | |
1247 | INIT_WORK(&cmd->work, bot_cmd_work); | |
1248 | ret = queue_work(tpg->workqueue, &cmd->work); | |
1249 | if (ret < 0) | |
1250 | goto err; | |
1251 | ||
1252 | return 0; | |
1253 | err: | |
1254 | kfree(cmd); | |
1255 | return -EINVAL; | |
1256 | } | |
1257 | ||
1258 | /* Start fabric.c code */ | |
1259 | ||
1260 | static int usbg_check_true(struct se_portal_group *se_tpg) | |
1261 | { | |
1262 | return 1; | |
1263 | } | |
1264 | ||
1265 | static int usbg_check_false(struct se_portal_group *se_tpg) | |
1266 | { | |
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | static char *usbg_get_fabric_name(void) | |
1271 | { | |
1272 | return "usb_gadget"; | |
1273 | } | |
1274 | ||
c52661d6 SAS |
1275 | static char *usbg_get_fabric_wwn(struct se_portal_group *se_tpg) |
1276 | { | |
1277 | struct usbg_tpg *tpg = container_of(se_tpg, | |
1278 | struct usbg_tpg, se_tpg); | |
1279 | struct usbg_tport *tport = tpg->tport; | |
1280 | ||
1281 | return &tport->tport_name[0]; | |
1282 | } | |
1283 | ||
1284 | static u16 usbg_get_tag(struct se_portal_group *se_tpg) | |
1285 | { | |
1286 | struct usbg_tpg *tpg = container_of(se_tpg, | |
1287 | struct usbg_tpg, se_tpg); | |
1288 | return tpg->tport_tpgt; | |
1289 | } | |
1290 | ||
c52661d6 SAS |
1291 | static u32 usbg_tpg_get_inst_index(struct se_portal_group *se_tpg) |
1292 | { | |
1293 | return 1; | |
1294 | } | |
1295 | ||
c52661d6 SAS |
1296 | static void usbg_cmd_release(struct kref *ref) |
1297 | { | |
1298 | struct usbg_cmd *cmd = container_of(ref, struct usbg_cmd, | |
1299 | ref); | |
1300 | ||
1301 | transport_generic_free_cmd(&cmd->se_cmd, 0); | |
1302 | } | |
1303 | ||
1304 | static void usbg_release_cmd(struct se_cmd *se_cmd) | |
1305 | { | |
1306 | struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd, | |
1307 | se_cmd); | |
1308 | kfree(cmd->data_buf); | |
1309 | kfree(cmd); | |
1310 | return; | |
1311 | } | |
1312 | ||
1313 | static int usbg_shutdown_session(struct se_session *se_sess) | |
1314 | { | |
1315 | return 0; | |
1316 | } | |
1317 | ||
1318 | static void usbg_close_session(struct se_session *se_sess) | |
1319 | { | |
1320 | return; | |
1321 | } | |
1322 | ||
1323 | static u32 usbg_sess_get_index(struct se_session *se_sess) | |
1324 | { | |
1325 | return 0; | |
1326 | } | |
1327 | ||
1328 | /* | |
1329 | * XXX Error recovery: return != 0 if we expect writes. Dunno when that could be | |
1330 | */ | |
1331 | static int usbg_write_pending_status(struct se_cmd *se_cmd) | |
1332 | { | |
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | static void usbg_set_default_node_attrs(struct se_node_acl *nacl) | |
1337 | { | |
1338 | return; | |
1339 | } | |
1340 | ||
c52661d6 SAS |
1341 | static int usbg_get_cmd_state(struct se_cmd *se_cmd) |
1342 | { | |
1343 | return 0; | |
1344 | } | |
1345 | ||
b79fafac | 1346 | static void usbg_queue_tm_rsp(struct se_cmd *se_cmd) |
c52661d6 | 1347 | { |
c52661d6 SAS |
1348 | } |
1349 | ||
131e6abc NB |
1350 | static void usbg_aborted_task(struct se_cmd *se_cmd) |
1351 | { | |
1352 | return; | |
1353 | } | |
1354 | ||
c52661d6 SAS |
1355 | static const char *usbg_check_wwn(const char *name) |
1356 | { | |
1357 | const char *n; | |
1358 | unsigned int len; | |
1359 | ||
1360 | n = strstr(name, "naa."); | |
1361 | if (!n) | |
1362 | return NULL; | |
1363 | n += 4; | |
1364 | len = strlen(n); | |
1365 | if (len == 0 || len > USBG_NAMELEN - 1) | |
1366 | return NULL; | |
1367 | return n; | |
1368 | } | |
1369 | ||
c7d6a803 | 1370 | static int usbg_init_nodeacl(struct se_node_acl *se_nacl, const char *name) |
c52661d6 | 1371 | { |
c7d6a803 CH |
1372 | if (!usbg_check_wwn(name)) |
1373 | return -EINVAL; | |
1374 | return 0; | |
c52661d6 SAS |
1375 | } |
1376 | ||
1377 | struct usbg_tpg *the_only_tpg_I_currently_have; | |
1378 | ||
1379 | static struct se_portal_group *usbg_make_tpg( | |
1380 | struct se_wwn *wwn, | |
1381 | struct config_group *group, | |
1382 | const char *name) | |
1383 | { | |
1384 | struct usbg_tport *tport = container_of(wwn, struct usbg_tport, | |
1385 | tport_wwn); | |
1386 | struct usbg_tpg *tpg; | |
1387 | unsigned long tpgt; | |
1388 | int ret; | |
1389 | ||
1390 | if (strstr(name, "tpgt_") != name) | |
1391 | return ERR_PTR(-EINVAL); | |
1392 | if (kstrtoul(name + 5, 0, &tpgt) || tpgt > UINT_MAX) | |
1393 | return ERR_PTR(-EINVAL); | |
1394 | if (the_only_tpg_I_currently_have) { | |
1395 | pr_err("Until the gadget framework can't handle multiple\n"); | |
1396 | pr_err("gadgets, you can't do this here.\n"); | |
1397 | return ERR_PTR(-EBUSY); | |
1398 | } | |
1399 | ||
1400 | tpg = kzalloc(sizeof(struct usbg_tpg), GFP_KERNEL); | |
f06d186d | 1401 | if (!tpg) |
c52661d6 | 1402 | return ERR_PTR(-ENOMEM); |
c52661d6 SAS |
1403 | mutex_init(&tpg->tpg_mutex); |
1404 | atomic_set(&tpg->tpg_port_count, 0); | |
1405 | tpg->workqueue = alloc_workqueue("tcm_usb_gadget", 0, 1); | |
1406 | if (!tpg->workqueue) { | |
1407 | kfree(tpg); | |
1408 | return NULL; | |
1409 | } | |
1410 | ||
1411 | tpg->tport = tport; | |
1412 | tpg->tport_tpgt = tpgt; | |
1413 | ||
2650d71e CH |
1414 | /* |
1415 | * SPC doesn't assign a protocol identifier for USB-SCSI, so we | |
1416 | * pretend to be SAS.. | |
1417 | */ | |
bc0c94b1 | 1418 | ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_SAS); |
c52661d6 SAS |
1419 | if (ret < 0) { |
1420 | destroy_workqueue(tpg->workqueue); | |
1421 | kfree(tpg); | |
1422 | return NULL; | |
1423 | } | |
1424 | the_only_tpg_I_currently_have = tpg; | |
1425 | return &tpg->se_tpg; | |
1426 | } | |
1427 | ||
1428 | static void usbg_drop_tpg(struct se_portal_group *se_tpg) | |
1429 | { | |
1430 | struct usbg_tpg *tpg = container_of(se_tpg, | |
1431 | struct usbg_tpg, se_tpg); | |
1432 | ||
1433 | core_tpg_deregister(se_tpg); | |
1434 | destroy_workqueue(tpg->workqueue); | |
1435 | kfree(tpg); | |
1436 | the_only_tpg_I_currently_have = NULL; | |
1437 | } | |
1438 | ||
1439 | static struct se_wwn *usbg_make_tport( | |
1440 | struct target_fabric_configfs *tf, | |
1441 | struct config_group *group, | |
1442 | const char *name) | |
1443 | { | |
1444 | struct usbg_tport *tport; | |
1445 | const char *wnn_name; | |
1446 | u64 wwpn = 0; | |
1447 | ||
1448 | wnn_name = usbg_check_wwn(name); | |
1449 | if (!wnn_name) | |
1450 | return ERR_PTR(-EINVAL); | |
1451 | ||
1452 | tport = kzalloc(sizeof(struct usbg_tport), GFP_KERNEL); | |
f06d186d | 1453 | if (!(tport)) |
c52661d6 | 1454 | return ERR_PTR(-ENOMEM); |
c52661d6 | 1455 | tport->tport_wwpn = wwpn; |
aba37fd9 | 1456 | snprintf(tport->tport_name, sizeof(tport->tport_name), "%s", wnn_name); |
c52661d6 SAS |
1457 | return &tport->tport_wwn; |
1458 | } | |
1459 | ||
1460 | static void usbg_drop_tport(struct se_wwn *wwn) | |
1461 | { | |
1462 | struct usbg_tport *tport = container_of(wwn, | |
1463 | struct usbg_tport, tport_wwn); | |
1464 | kfree(tport); | |
1465 | } | |
1466 | ||
1467 | /* | |
1468 | * If somebody feels like dropping the version property, go ahead. | |
1469 | */ | |
1470 | static ssize_t usbg_wwn_show_attr_version( | |
1471 | struct target_fabric_configfs *tf, | |
1472 | char *page) | |
1473 | { | |
1474 | return sprintf(page, "usb-gadget fabric module\n"); | |
1475 | } | |
1476 | TF_WWN_ATTR_RO(usbg, version); | |
1477 | ||
1478 | static struct configfs_attribute *usbg_wwn_attrs[] = { | |
1479 | &usbg_wwn_version.attr, | |
1480 | NULL, | |
1481 | }; | |
1482 | ||
1483 | static ssize_t tcm_usbg_tpg_show_enable( | |
1484 | struct se_portal_group *se_tpg, | |
1485 | char *page) | |
1486 | { | |
1487 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1488 | ||
1489 | return snprintf(page, PAGE_SIZE, "%u\n", tpg->gadget_connect); | |
1490 | } | |
1491 | ||
1492 | static int usbg_attach(struct usbg_tpg *); | |
1493 | static void usbg_detach(struct usbg_tpg *); | |
1494 | ||
1495 | static ssize_t tcm_usbg_tpg_store_enable( | |
1496 | struct se_portal_group *se_tpg, | |
1497 | const char *page, | |
1498 | size_t count) | |
1499 | { | |
1500 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1501 | unsigned long op; | |
1502 | ssize_t ret; | |
1503 | ||
1504 | ret = kstrtoul(page, 0, &op); | |
1505 | if (ret < 0) | |
1506 | return -EINVAL; | |
1507 | if (op > 1) | |
1508 | return -EINVAL; | |
1509 | ||
1510 | if (op && tpg->gadget_connect) | |
1511 | goto out; | |
1512 | if (!op && !tpg->gadget_connect) | |
1513 | goto out; | |
1514 | ||
1515 | if (op) { | |
1516 | ret = usbg_attach(tpg); | |
1517 | if (ret) | |
1518 | goto out; | |
1519 | } else { | |
1520 | usbg_detach(tpg); | |
1521 | } | |
1522 | tpg->gadget_connect = op; | |
1523 | out: | |
1524 | return count; | |
1525 | } | |
1526 | TF_TPG_BASE_ATTR(tcm_usbg, enable, S_IRUGO | S_IWUSR); | |
1527 | ||
1528 | static ssize_t tcm_usbg_tpg_show_nexus( | |
1529 | struct se_portal_group *se_tpg, | |
1530 | char *page) | |
1531 | { | |
1532 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1533 | struct tcm_usbg_nexus *tv_nexus; | |
1534 | ssize_t ret; | |
1535 | ||
1536 | mutex_lock(&tpg->tpg_mutex); | |
1537 | tv_nexus = tpg->tpg_nexus; | |
1538 | if (!tv_nexus) { | |
1539 | ret = -ENODEV; | |
1540 | goto out; | |
1541 | } | |
1542 | ret = snprintf(page, PAGE_SIZE, "%s\n", | |
1543 | tv_nexus->tvn_se_sess->se_node_acl->initiatorname); | |
1544 | out: | |
1545 | mutex_unlock(&tpg->tpg_mutex); | |
1546 | return ret; | |
1547 | } | |
1548 | ||
1549 | static int tcm_usbg_make_nexus(struct usbg_tpg *tpg, char *name) | |
1550 | { | |
1551 | struct se_portal_group *se_tpg; | |
1552 | struct tcm_usbg_nexus *tv_nexus; | |
1553 | int ret; | |
1554 | ||
1555 | mutex_lock(&tpg->tpg_mutex); | |
1556 | if (tpg->tpg_nexus) { | |
1557 | ret = -EEXIST; | |
1558 | pr_debug("tpg->tpg_nexus already exists\n"); | |
1559 | goto err_unlock; | |
1560 | } | |
1561 | se_tpg = &tpg->se_tpg; | |
1562 | ||
1563 | ret = -ENOMEM; | |
1564 | tv_nexus = kzalloc(sizeof(*tv_nexus), GFP_KERNEL); | |
f06d186d | 1565 | if (!tv_nexus) |
c52661d6 | 1566 | goto err_unlock; |
e70beee7 | 1567 | tv_nexus->tvn_se_sess = transport_init_session(TARGET_PROT_NORMAL); |
c52661d6 SAS |
1568 | if (IS_ERR(tv_nexus->tvn_se_sess)) |
1569 | goto err_free; | |
1570 | ||
1571 | /* | |
1572 | * Since we are running in 'demo mode' this call with generate a | |
1573 | * struct se_node_acl for the tcm_vhost struct se_portal_group with | |
1574 | * the SCSI Initiator port name of the passed configfs group 'name'. | |
1575 | */ | |
1576 | tv_nexus->tvn_se_sess->se_node_acl = core_tpg_check_initiator_node_acl( | |
1577 | se_tpg, name); | |
1578 | if (!tv_nexus->tvn_se_sess->se_node_acl) { | |
1579 | pr_debug("core_tpg_check_initiator_node_acl() failed" | |
1580 | " for %s\n", name); | |
1581 | goto err_session; | |
1582 | } | |
1583 | /* | |
2f450cc1 | 1584 | * Now register the TCM vHost virtual I_T Nexus as active. |
c52661d6 | 1585 | */ |
2f450cc1 | 1586 | transport_register_session(se_tpg, tv_nexus->tvn_se_sess->se_node_acl, |
c52661d6 SAS |
1587 | tv_nexus->tvn_se_sess, tv_nexus); |
1588 | tpg->tpg_nexus = tv_nexus; | |
1589 | mutex_unlock(&tpg->tpg_mutex); | |
1590 | return 0; | |
1591 | ||
1592 | err_session: | |
1593 | transport_free_session(tv_nexus->tvn_se_sess); | |
1594 | err_free: | |
1595 | kfree(tv_nexus); | |
1596 | err_unlock: | |
1597 | mutex_unlock(&tpg->tpg_mutex); | |
1598 | return ret; | |
1599 | } | |
1600 | ||
1601 | static int tcm_usbg_drop_nexus(struct usbg_tpg *tpg) | |
1602 | { | |
1603 | struct se_session *se_sess; | |
1604 | struct tcm_usbg_nexus *tv_nexus; | |
1605 | int ret = -ENODEV; | |
1606 | ||
1607 | mutex_lock(&tpg->tpg_mutex); | |
1608 | tv_nexus = tpg->tpg_nexus; | |
1609 | if (!tv_nexus) | |
1610 | goto out; | |
1611 | ||
1612 | se_sess = tv_nexus->tvn_se_sess; | |
1613 | if (!se_sess) | |
1614 | goto out; | |
1615 | ||
1616 | if (atomic_read(&tpg->tpg_port_count)) { | |
1617 | ret = -EPERM; | |
1618 | pr_err("Unable to remove Host I_T Nexus with" | |
1619 | " active TPG port count: %d\n", | |
1620 | atomic_read(&tpg->tpg_port_count)); | |
1621 | goto out; | |
1622 | } | |
1623 | ||
1624 | pr_debug("Removing I_T Nexus to Initiator Port: %s\n", | |
1625 | tv_nexus->tvn_se_sess->se_node_acl->initiatorname); | |
1626 | /* | |
1627 | * Release the SCSI I_T Nexus to the emulated vHost Target Port | |
1628 | */ | |
1629 | transport_deregister_session(tv_nexus->tvn_se_sess); | |
1630 | tpg->tpg_nexus = NULL; | |
1631 | ||
1632 | kfree(tv_nexus); | |
5dbd6935 | 1633 | ret = 0; |
c52661d6 SAS |
1634 | out: |
1635 | mutex_unlock(&tpg->tpg_mutex); | |
5dbd6935 | 1636 | return ret; |
c52661d6 SAS |
1637 | } |
1638 | ||
1639 | static ssize_t tcm_usbg_tpg_store_nexus( | |
1640 | struct se_portal_group *se_tpg, | |
1641 | const char *page, | |
1642 | size_t count) | |
1643 | { | |
1644 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1645 | unsigned char i_port[USBG_NAMELEN], *ptr; | |
1646 | int ret; | |
1647 | ||
1648 | if (!strncmp(page, "NULL", 4)) { | |
1649 | ret = tcm_usbg_drop_nexus(tpg); | |
1650 | return (!ret) ? count : ret; | |
1651 | } | |
232ebe34 | 1652 | if (strlen(page) >= USBG_NAMELEN) { |
c52661d6 SAS |
1653 | pr_err("Emulated NAA Sas Address: %s, exceeds" |
1654 | " max: %d\n", page, USBG_NAMELEN); | |
1655 | return -EINVAL; | |
1656 | } | |
1657 | snprintf(i_port, USBG_NAMELEN, "%s", page); | |
1658 | ||
1659 | ptr = strstr(i_port, "naa."); | |
1660 | if (!ptr) { | |
1661 | pr_err("Missing 'naa.' prefix\n"); | |
1662 | return -EINVAL; | |
1663 | } | |
1664 | ||
1665 | if (i_port[strlen(i_port) - 1] == '\n') | |
1666 | i_port[strlen(i_port) - 1] = '\0'; | |
1667 | ||
1668 | ret = tcm_usbg_make_nexus(tpg, &i_port[4]); | |
1669 | if (ret < 0) | |
1670 | return ret; | |
1671 | return count; | |
1672 | } | |
1673 | TF_TPG_BASE_ATTR(tcm_usbg, nexus, S_IRUGO | S_IWUSR); | |
1674 | ||
1675 | static struct configfs_attribute *usbg_base_attrs[] = { | |
1676 | &tcm_usbg_tpg_enable.attr, | |
1677 | &tcm_usbg_tpg_nexus.attr, | |
1678 | NULL, | |
1679 | }; | |
1680 | ||
1681 | static int usbg_port_link(struct se_portal_group *se_tpg, struct se_lun *lun) | |
1682 | { | |
1683 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1684 | ||
1685 | atomic_inc(&tpg->tpg_port_count); | |
4e857c58 | 1686 | smp_mb__after_atomic(); |
c52661d6 SAS |
1687 | return 0; |
1688 | } | |
1689 | ||
1690 | static void usbg_port_unlink(struct se_portal_group *se_tpg, | |
1691 | struct se_lun *se_lun) | |
1692 | { | |
1693 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1694 | ||
1695 | atomic_dec(&tpg->tpg_port_count); | |
4e857c58 | 1696 | smp_mb__after_atomic(); |
c52661d6 SAS |
1697 | } |
1698 | ||
1699 | static int usbg_check_stop_free(struct se_cmd *se_cmd) | |
1700 | { | |
1701 | struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd, | |
1702 | se_cmd); | |
1703 | ||
1704 | kref_put(&cmd->ref, usbg_cmd_release); | |
1705 | return 1; | |
1706 | } | |
1707 | ||
9ac8928e CH |
1708 | static const struct target_core_fabric_ops usbg_ops = { |
1709 | .module = THIS_MODULE, | |
1710 | .name = "usb_gadget", | |
c52661d6 | 1711 | .get_fabric_name = usbg_get_fabric_name, |
c52661d6 SAS |
1712 | .tpg_get_wwn = usbg_get_fabric_wwn, |
1713 | .tpg_get_tag = usbg_get_tag, | |
c52661d6 SAS |
1714 | .tpg_check_demo_mode = usbg_check_true, |
1715 | .tpg_check_demo_mode_cache = usbg_check_false, | |
1716 | .tpg_check_demo_mode_write_protect = usbg_check_false, | |
1717 | .tpg_check_prod_mode_write_protect = usbg_check_false, | |
c52661d6 | 1718 | .tpg_get_inst_index = usbg_tpg_get_inst_index, |
c52661d6 SAS |
1719 | .release_cmd = usbg_release_cmd, |
1720 | .shutdown_session = usbg_shutdown_session, | |
1721 | .close_session = usbg_close_session, | |
1722 | .sess_get_index = usbg_sess_get_index, | |
1723 | .sess_get_initiator_sid = NULL, | |
1724 | .write_pending = usbg_send_write_request, | |
1725 | .write_pending_status = usbg_write_pending_status, | |
1726 | .set_default_node_attributes = usbg_set_default_node_attrs, | |
c52661d6 SAS |
1727 | .get_cmd_state = usbg_get_cmd_state, |
1728 | .queue_data_in = usbg_send_read_response, | |
1729 | .queue_status = usbg_send_status_response, | |
1730 | .queue_tm_rsp = usbg_queue_tm_rsp, | |
131e6abc | 1731 | .aborted_task = usbg_aborted_task, |
c52661d6 SAS |
1732 | .check_stop_free = usbg_check_stop_free, |
1733 | ||
1734 | .fabric_make_wwn = usbg_make_tport, | |
1735 | .fabric_drop_wwn = usbg_drop_tport, | |
1736 | .fabric_make_tpg = usbg_make_tpg, | |
1737 | .fabric_drop_tpg = usbg_drop_tpg, | |
1738 | .fabric_post_link = usbg_port_link, | |
1739 | .fabric_pre_unlink = usbg_port_unlink, | |
c7d6a803 | 1740 | .fabric_init_nodeacl = usbg_init_nodeacl, |
c52661d6 | 1741 | |
9ac8928e CH |
1742 | .tfc_wwn_attrs = usbg_wwn_attrs, |
1743 | .tfc_tpg_base_attrs = usbg_base_attrs, | |
c52661d6 SAS |
1744 | }; |
1745 | ||
1746 | /* Start gadget.c code */ | |
1747 | ||
1748 | static struct usb_interface_descriptor bot_intf_desc = { | |
1749 | .bLength = sizeof(bot_intf_desc), | |
1750 | .bDescriptorType = USB_DT_INTERFACE, | |
c52661d6 SAS |
1751 | .bNumEndpoints = 2, |
1752 | .bAlternateSetting = USB_G_ALT_INT_BBB, | |
1753 | .bInterfaceClass = USB_CLASS_MASS_STORAGE, | |
1754 | .bInterfaceSubClass = USB_SC_SCSI, | |
1755 | .bInterfaceProtocol = USB_PR_BULK, | |
c52661d6 SAS |
1756 | }; |
1757 | ||
1758 | static struct usb_interface_descriptor uasp_intf_desc = { | |
1759 | .bLength = sizeof(uasp_intf_desc), | |
1760 | .bDescriptorType = USB_DT_INTERFACE, | |
1761 | .bNumEndpoints = 4, | |
1762 | .bAlternateSetting = USB_G_ALT_INT_UAS, | |
1763 | .bInterfaceClass = USB_CLASS_MASS_STORAGE, | |
1764 | .bInterfaceSubClass = USB_SC_SCSI, | |
1765 | .bInterfaceProtocol = USB_PR_UAS, | |
c52661d6 SAS |
1766 | }; |
1767 | ||
1768 | static struct usb_endpoint_descriptor uasp_bi_desc = { | |
1769 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1770 | .bDescriptorType = USB_DT_ENDPOINT, | |
1771 | .bEndpointAddress = USB_DIR_IN, | |
1772 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1773 | .wMaxPacketSize = cpu_to_le16(512), | |
1774 | }; | |
1775 | ||
1776 | static struct usb_endpoint_descriptor uasp_fs_bi_desc = { | |
1777 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1778 | .bDescriptorType = USB_DT_ENDPOINT, | |
1779 | .bEndpointAddress = USB_DIR_IN, | |
1780 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1781 | }; | |
1782 | ||
1783 | static struct usb_pipe_usage_descriptor uasp_bi_pipe_desc = { | |
1784 | .bLength = sizeof(uasp_bi_pipe_desc), | |
1785 | .bDescriptorType = USB_DT_PIPE_USAGE, | |
1786 | .bPipeID = DATA_IN_PIPE_ID, | |
1787 | }; | |
1788 | ||
1789 | static struct usb_endpoint_descriptor uasp_ss_bi_desc = { | |
1790 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1791 | .bDescriptorType = USB_DT_ENDPOINT, | |
1792 | .bEndpointAddress = USB_DIR_IN, | |
1793 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1794 | .wMaxPacketSize = cpu_to_le16(1024), | |
1795 | }; | |
1796 | ||
1797 | static struct usb_ss_ep_comp_descriptor uasp_bi_ep_comp_desc = { | |
1798 | .bLength = sizeof(uasp_bi_ep_comp_desc), | |
1799 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1800 | .bMaxBurst = 0, | |
1801 | .bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS, | |
1802 | .wBytesPerInterval = 0, | |
1803 | }; | |
1804 | ||
1805 | static struct usb_ss_ep_comp_descriptor bot_bi_ep_comp_desc = { | |
1806 | .bLength = sizeof(bot_bi_ep_comp_desc), | |
1807 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1808 | .bMaxBurst = 0, | |
1809 | }; | |
1810 | ||
1811 | static struct usb_endpoint_descriptor uasp_bo_desc = { | |
1812 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1813 | .bDescriptorType = USB_DT_ENDPOINT, | |
1814 | .bEndpointAddress = USB_DIR_OUT, | |
1815 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1816 | .wMaxPacketSize = cpu_to_le16(512), | |
1817 | }; | |
1818 | ||
1819 | static struct usb_endpoint_descriptor uasp_fs_bo_desc = { | |
1820 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1821 | .bDescriptorType = USB_DT_ENDPOINT, | |
1822 | .bEndpointAddress = USB_DIR_OUT, | |
1823 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1824 | }; | |
1825 | ||
1826 | static struct usb_pipe_usage_descriptor uasp_bo_pipe_desc = { | |
1827 | .bLength = sizeof(uasp_bo_pipe_desc), | |
1828 | .bDescriptorType = USB_DT_PIPE_USAGE, | |
1829 | .bPipeID = DATA_OUT_PIPE_ID, | |
1830 | }; | |
1831 | ||
1832 | static struct usb_endpoint_descriptor uasp_ss_bo_desc = { | |
1833 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1834 | .bDescriptorType = USB_DT_ENDPOINT, | |
1835 | .bEndpointAddress = USB_DIR_OUT, | |
1836 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1837 | .wMaxPacketSize = cpu_to_le16(0x400), | |
1838 | }; | |
1839 | ||
1840 | static struct usb_ss_ep_comp_descriptor uasp_bo_ep_comp_desc = { | |
1841 | .bLength = sizeof(uasp_bo_ep_comp_desc), | |
1842 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1843 | .bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS, | |
1844 | }; | |
1845 | ||
1846 | static struct usb_ss_ep_comp_descriptor bot_bo_ep_comp_desc = { | |
1847 | .bLength = sizeof(bot_bo_ep_comp_desc), | |
1848 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1849 | }; | |
1850 | ||
1851 | static struct usb_endpoint_descriptor uasp_status_desc = { | |
1852 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1853 | .bDescriptorType = USB_DT_ENDPOINT, | |
1854 | .bEndpointAddress = USB_DIR_IN, | |
1855 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1856 | .wMaxPacketSize = cpu_to_le16(512), | |
1857 | }; | |
1858 | ||
1859 | static struct usb_endpoint_descriptor uasp_fs_status_desc = { | |
1860 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1861 | .bDescriptorType = USB_DT_ENDPOINT, | |
1862 | .bEndpointAddress = USB_DIR_IN, | |
1863 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1864 | }; | |
1865 | ||
1866 | static struct usb_pipe_usage_descriptor uasp_status_pipe_desc = { | |
1867 | .bLength = sizeof(uasp_status_pipe_desc), | |
1868 | .bDescriptorType = USB_DT_PIPE_USAGE, | |
1869 | .bPipeID = STATUS_PIPE_ID, | |
1870 | }; | |
1871 | ||
1872 | static struct usb_endpoint_descriptor uasp_ss_status_desc = { | |
1873 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1874 | .bDescriptorType = USB_DT_ENDPOINT, | |
1875 | .bEndpointAddress = USB_DIR_IN, | |
1876 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1877 | .wMaxPacketSize = cpu_to_le16(1024), | |
1878 | }; | |
1879 | ||
1880 | static struct usb_ss_ep_comp_descriptor uasp_status_in_ep_comp_desc = { | |
1881 | .bLength = sizeof(uasp_status_in_ep_comp_desc), | |
1882 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1883 | .bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS, | |
1884 | }; | |
1885 | ||
1886 | static struct usb_endpoint_descriptor uasp_cmd_desc = { | |
1887 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1888 | .bDescriptorType = USB_DT_ENDPOINT, | |
1889 | .bEndpointAddress = USB_DIR_OUT, | |
1890 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1891 | .wMaxPacketSize = cpu_to_le16(512), | |
1892 | }; | |
1893 | ||
1894 | static struct usb_endpoint_descriptor uasp_fs_cmd_desc = { | |
1895 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1896 | .bDescriptorType = USB_DT_ENDPOINT, | |
1897 | .bEndpointAddress = USB_DIR_OUT, | |
1898 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1899 | }; | |
1900 | ||
1901 | static struct usb_pipe_usage_descriptor uasp_cmd_pipe_desc = { | |
1902 | .bLength = sizeof(uasp_cmd_pipe_desc), | |
1903 | .bDescriptorType = USB_DT_PIPE_USAGE, | |
1904 | .bPipeID = CMD_PIPE_ID, | |
1905 | }; | |
1906 | ||
1907 | static struct usb_endpoint_descriptor uasp_ss_cmd_desc = { | |
1908 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1909 | .bDescriptorType = USB_DT_ENDPOINT, | |
1910 | .bEndpointAddress = USB_DIR_OUT, | |
1911 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1912 | .wMaxPacketSize = cpu_to_le16(1024), | |
1913 | }; | |
1914 | ||
1915 | static struct usb_ss_ep_comp_descriptor uasp_cmd_comp_desc = { | |
1916 | .bLength = sizeof(uasp_cmd_comp_desc), | |
1917 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1918 | }; | |
1919 | ||
1920 | static struct usb_descriptor_header *uasp_fs_function_desc[] = { | |
1921 | (struct usb_descriptor_header *) &bot_intf_desc, | |
1922 | (struct usb_descriptor_header *) &uasp_fs_bi_desc, | |
1923 | (struct usb_descriptor_header *) &uasp_fs_bo_desc, | |
1924 | ||
1925 | (struct usb_descriptor_header *) &uasp_intf_desc, | |
1926 | (struct usb_descriptor_header *) &uasp_fs_bi_desc, | |
1927 | (struct usb_descriptor_header *) &uasp_bi_pipe_desc, | |
1928 | (struct usb_descriptor_header *) &uasp_fs_bo_desc, | |
1929 | (struct usb_descriptor_header *) &uasp_bo_pipe_desc, | |
1930 | (struct usb_descriptor_header *) &uasp_fs_status_desc, | |
1931 | (struct usb_descriptor_header *) &uasp_status_pipe_desc, | |
1932 | (struct usb_descriptor_header *) &uasp_fs_cmd_desc, | |
1933 | (struct usb_descriptor_header *) &uasp_cmd_pipe_desc, | |
fad8deb2 | 1934 | NULL, |
c52661d6 SAS |
1935 | }; |
1936 | ||
1937 | static struct usb_descriptor_header *uasp_hs_function_desc[] = { | |
1938 | (struct usb_descriptor_header *) &bot_intf_desc, | |
1939 | (struct usb_descriptor_header *) &uasp_bi_desc, | |
1940 | (struct usb_descriptor_header *) &uasp_bo_desc, | |
1941 | ||
1942 | (struct usb_descriptor_header *) &uasp_intf_desc, | |
1943 | (struct usb_descriptor_header *) &uasp_bi_desc, | |
1944 | (struct usb_descriptor_header *) &uasp_bi_pipe_desc, | |
1945 | (struct usb_descriptor_header *) &uasp_bo_desc, | |
1946 | (struct usb_descriptor_header *) &uasp_bo_pipe_desc, | |
1947 | (struct usb_descriptor_header *) &uasp_status_desc, | |
1948 | (struct usb_descriptor_header *) &uasp_status_pipe_desc, | |
1949 | (struct usb_descriptor_header *) &uasp_cmd_desc, | |
1950 | (struct usb_descriptor_header *) &uasp_cmd_pipe_desc, | |
1951 | NULL, | |
1952 | }; | |
1953 | ||
1954 | static struct usb_descriptor_header *uasp_ss_function_desc[] = { | |
1955 | (struct usb_descriptor_header *) &bot_intf_desc, | |
1956 | (struct usb_descriptor_header *) &uasp_ss_bi_desc, | |
1957 | (struct usb_descriptor_header *) &bot_bi_ep_comp_desc, | |
1958 | (struct usb_descriptor_header *) &uasp_ss_bo_desc, | |
1959 | (struct usb_descriptor_header *) &bot_bo_ep_comp_desc, | |
1960 | ||
1961 | (struct usb_descriptor_header *) &uasp_intf_desc, | |
1962 | (struct usb_descriptor_header *) &uasp_ss_bi_desc, | |
1963 | (struct usb_descriptor_header *) &uasp_bi_ep_comp_desc, | |
1964 | (struct usb_descriptor_header *) &uasp_bi_pipe_desc, | |
1965 | (struct usb_descriptor_header *) &uasp_ss_bo_desc, | |
1966 | (struct usb_descriptor_header *) &uasp_bo_ep_comp_desc, | |
1967 | (struct usb_descriptor_header *) &uasp_bo_pipe_desc, | |
1968 | (struct usb_descriptor_header *) &uasp_ss_status_desc, | |
1969 | (struct usb_descriptor_header *) &uasp_status_in_ep_comp_desc, | |
1970 | (struct usb_descriptor_header *) &uasp_status_pipe_desc, | |
1971 | (struct usb_descriptor_header *) &uasp_ss_cmd_desc, | |
1972 | (struct usb_descriptor_header *) &uasp_cmd_comp_desc, | |
1973 | (struct usb_descriptor_header *) &uasp_cmd_pipe_desc, | |
1974 | NULL, | |
1975 | }; | |
1976 | ||
1977 | #define UAS_VENDOR_ID 0x0525 /* NetChip */ | |
1978 | #define UAS_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */ | |
1979 | ||
1980 | static struct usb_device_descriptor usbg_device_desc = { | |
1981 | .bLength = sizeof(usbg_device_desc), | |
1982 | .bDescriptorType = USB_DT_DEVICE, | |
1983 | .bcdUSB = cpu_to_le16(0x0200), | |
1984 | .bDeviceClass = USB_CLASS_PER_INTERFACE, | |
1985 | .idVendor = cpu_to_le16(UAS_VENDOR_ID), | |
1986 | .idProduct = cpu_to_le16(UAS_PRODUCT_ID), | |
c52661d6 SAS |
1987 | .bNumConfigurations = 1, |
1988 | }; | |
1989 | ||
1990 | static struct usb_string usbg_us_strings[] = { | |
276e2e4f SAS |
1991 | [USB_GADGET_MANUFACTURER_IDX].s = "Target Manufactor", |
1992 | [USB_GADGET_PRODUCT_IDX].s = "Target Product", | |
1993 | [USB_GADGET_SERIAL_IDX].s = "000000000001", | |
18786da4 SAS |
1994 | [USB_G_STR_CONFIG].s = "default config", |
1995 | [USB_G_STR_INT_UAS].s = "USB Attached SCSI", | |
1996 | [USB_G_STR_INT_BBB].s = "Bulk Only Transport", | |
c52661d6 SAS |
1997 | { }, |
1998 | }; | |
1999 | ||
2000 | static struct usb_gadget_strings usbg_stringtab = { | |
2001 | .language = 0x0409, | |
2002 | .strings = usbg_us_strings, | |
2003 | }; | |
2004 | ||
2005 | static struct usb_gadget_strings *usbg_strings[] = { | |
2006 | &usbg_stringtab, | |
2007 | NULL, | |
2008 | }; | |
2009 | ||
2010 | static int guas_unbind(struct usb_composite_dev *cdev) | |
2011 | { | |
2012 | return 0; | |
2013 | } | |
2014 | ||
2015 | static struct usb_configuration usbg_config_driver = { | |
2016 | .label = "Linux Target", | |
2017 | .bConfigurationValue = 1, | |
c52661d6 SAS |
2018 | .bmAttributes = USB_CONFIG_ATT_SELFPOWER, |
2019 | }; | |
2020 | ||
2021 | static void give_back_ep(struct usb_ep **pep) | |
2022 | { | |
2023 | struct usb_ep *ep = *pep; | |
2024 | if (!ep) | |
2025 | return; | |
2026 | ep->driver_data = NULL; | |
2027 | } | |
2028 | ||
2029 | static int usbg_bind(struct usb_configuration *c, struct usb_function *f) | |
2030 | { | |
2031 | struct f_uas *fu = to_f_uas(f); | |
2032 | struct usb_gadget *gadget = c->cdev->gadget; | |
2033 | struct usb_ep *ep; | |
2034 | int iface; | |
10287bae | 2035 | int ret; |
c52661d6 SAS |
2036 | |
2037 | iface = usb_interface_id(c, f); | |
2038 | if (iface < 0) | |
2039 | return iface; | |
2040 | ||
2041 | bot_intf_desc.bInterfaceNumber = iface; | |
2042 | uasp_intf_desc.bInterfaceNumber = iface; | |
2043 | fu->iface = iface; | |
2044 | ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_bi_desc, | |
2045 | &uasp_bi_ep_comp_desc); | |
2046 | if (!ep) | |
2047 | goto ep_fail; | |
2048 | ||
2049 | ep->driver_data = fu; | |
2050 | fu->ep_in = ep; | |
2051 | ||
2052 | ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_bo_desc, | |
2053 | &uasp_bo_ep_comp_desc); | |
2054 | if (!ep) | |
2055 | goto ep_fail; | |
2056 | ep->driver_data = fu; | |
2057 | fu->ep_out = ep; | |
2058 | ||
2059 | ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_status_desc, | |
2060 | &uasp_status_in_ep_comp_desc); | |
2061 | if (!ep) | |
2062 | goto ep_fail; | |
2063 | ep->driver_data = fu; | |
2064 | fu->ep_status = ep; | |
2065 | ||
2066 | ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_cmd_desc, | |
2067 | &uasp_cmd_comp_desc); | |
2068 | if (!ep) | |
2069 | goto ep_fail; | |
2070 | ep->driver_data = fu; | |
2071 | fu->ep_cmd = ep; | |
2072 | ||
2073 | /* Assume endpoint addresses are the same for both speeds */ | |
2074 | uasp_bi_desc.bEndpointAddress = uasp_ss_bi_desc.bEndpointAddress; | |
2075 | uasp_bo_desc.bEndpointAddress = uasp_ss_bo_desc.bEndpointAddress; | |
2076 | uasp_status_desc.bEndpointAddress = | |
2077 | uasp_ss_status_desc.bEndpointAddress; | |
2078 | uasp_cmd_desc.bEndpointAddress = uasp_ss_cmd_desc.bEndpointAddress; | |
2079 | ||
2080 | uasp_fs_bi_desc.bEndpointAddress = uasp_ss_bi_desc.bEndpointAddress; | |
2081 | uasp_fs_bo_desc.bEndpointAddress = uasp_ss_bo_desc.bEndpointAddress; | |
2082 | uasp_fs_status_desc.bEndpointAddress = | |
2083 | uasp_ss_status_desc.bEndpointAddress; | |
2084 | uasp_fs_cmd_desc.bEndpointAddress = uasp_ss_cmd_desc.bEndpointAddress; | |
2085 | ||
10287bae SAS |
2086 | ret = usb_assign_descriptors(f, uasp_fs_function_desc, |
2087 | uasp_hs_function_desc, uasp_ss_function_desc); | |
2088 | if (ret) | |
2089 | goto ep_fail; | |
2090 | ||
c52661d6 SAS |
2091 | return 0; |
2092 | ep_fail: | |
2093 | pr_err("Can't claim all required eps\n"); | |
2094 | ||
2095 | give_back_ep(&fu->ep_in); | |
2096 | give_back_ep(&fu->ep_out); | |
2097 | give_back_ep(&fu->ep_status); | |
2098 | give_back_ep(&fu->ep_cmd); | |
2099 | return -ENOTSUPP; | |
2100 | } | |
2101 | ||
2102 | static void usbg_unbind(struct usb_configuration *c, struct usb_function *f) | |
2103 | { | |
2104 | struct f_uas *fu = to_f_uas(f); | |
2105 | ||
10287bae | 2106 | usb_free_all_descriptors(f); |
c52661d6 SAS |
2107 | kfree(fu); |
2108 | } | |
2109 | ||
2110 | struct guas_setup_wq { | |
2111 | struct work_struct work; | |
2112 | struct f_uas *fu; | |
2113 | unsigned int alt; | |
2114 | }; | |
2115 | ||
2116 | static void usbg_delayed_set_alt(struct work_struct *wq) | |
2117 | { | |
2118 | struct guas_setup_wq *work = container_of(wq, struct guas_setup_wq, | |
2119 | work); | |
2120 | struct f_uas *fu = work->fu; | |
2121 | int alt = work->alt; | |
2122 | ||
2123 | kfree(work); | |
2124 | ||
2125 | if (fu->flags & USBG_IS_BOT) | |
2126 | bot_cleanup_old_alt(fu); | |
2127 | if (fu->flags & USBG_IS_UAS) | |
2128 | uasp_cleanup_old_alt(fu); | |
2129 | ||
2130 | if (alt == USB_G_ALT_INT_BBB) | |
2131 | bot_set_alt(fu); | |
2132 | else if (alt == USB_G_ALT_INT_UAS) | |
2133 | uasp_set_alt(fu); | |
2134 | usb_composite_setup_continue(fu->function.config->cdev); | |
2135 | } | |
2136 | ||
2137 | static int usbg_set_alt(struct usb_function *f, unsigned intf, unsigned alt) | |
2138 | { | |
2139 | struct f_uas *fu = to_f_uas(f); | |
2140 | ||
2141 | if ((alt == USB_G_ALT_INT_BBB) || (alt == USB_G_ALT_INT_UAS)) { | |
2142 | struct guas_setup_wq *work; | |
2143 | ||
2144 | work = kmalloc(sizeof(*work), GFP_ATOMIC); | |
2145 | if (!work) | |
2146 | return -ENOMEM; | |
2147 | INIT_WORK(&work->work, usbg_delayed_set_alt); | |
2148 | work->fu = fu; | |
2149 | work->alt = alt; | |
2150 | schedule_work(&work->work); | |
2151 | return USB_GADGET_DELAYED_STATUS; | |
2152 | } | |
2153 | return -EOPNOTSUPP; | |
2154 | } | |
2155 | ||
2156 | static void usbg_disable(struct usb_function *f) | |
2157 | { | |
2158 | struct f_uas *fu = to_f_uas(f); | |
2159 | ||
2160 | if (fu->flags & USBG_IS_UAS) | |
2161 | uasp_cleanup_old_alt(fu); | |
2162 | else if (fu->flags & USBG_IS_BOT) | |
2163 | bot_cleanup_old_alt(fu); | |
2164 | fu->flags = 0; | |
2165 | } | |
2166 | ||
2167 | static int usbg_setup(struct usb_function *f, | |
2168 | const struct usb_ctrlrequest *ctrl) | |
2169 | { | |
2170 | struct f_uas *fu = to_f_uas(f); | |
2171 | ||
2172 | if (!(fu->flags & USBG_IS_BOT)) | |
2173 | return -EOPNOTSUPP; | |
2174 | ||
2175 | return usbg_bot_setup(f, ctrl); | |
2176 | } | |
2177 | ||
2178 | static int usbg_cfg_bind(struct usb_configuration *c) | |
2179 | { | |
2180 | struct f_uas *fu; | |
2181 | int ret; | |
2182 | ||
2183 | fu = kzalloc(sizeof(*fu), GFP_KERNEL); | |
2184 | if (!fu) | |
2185 | return -ENOMEM; | |
2186 | fu->function.name = "Target Function"; | |
c52661d6 SAS |
2187 | fu->function.bind = usbg_bind; |
2188 | fu->function.unbind = usbg_unbind; | |
2189 | fu->function.set_alt = usbg_set_alt; | |
2190 | fu->function.setup = usbg_setup; | |
2191 | fu->function.disable = usbg_disable; | |
2192 | fu->tpg = the_only_tpg_I_currently_have; | |
2193 | ||
18786da4 SAS |
2194 | bot_intf_desc.iInterface = usbg_us_strings[USB_G_STR_INT_BBB].id; |
2195 | uasp_intf_desc.iInterface = usbg_us_strings[USB_G_STR_INT_UAS].id; | |
2196 | ||
c52661d6 SAS |
2197 | ret = usb_add_function(c, &fu->function); |
2198 | if (ret) | |
2199 | goto err; | |
2200 | ||
2201 | return 0; | |
2202 | err: | |
2203 | kfree(fu); | |
2204 | return ret; | |
2205 | } | |
2206 | ||
2207 | static int usb_target_bind(struct usb_composite_dev *cdev) | |
2208 | { | |
2209 | int ret; | |
2210 | ||
18786da4 SAS |
2211 | ret = usb_string_ids_tab(cdev, usbg_us_strings); |
2212 | if (ret) | |
2213 | return ret; | |
2214 | ||
2215 | usbg_device_desc.iManufacturer = | |
276e2e4f SAS |
2216 | usbg_us_strings[USB_GADGET_MANUFACTURER_IDX].id; |
2217 | usbg_device_desc.iProduct = usbg_us_strings[USB_GADGET_PRODUCT_IDX].id; | |
2218 | usbg_device_desc.iSerialNumber = | |
2219 | usbg_us_strings[USB_GADGET_SERIAL_IDX].id; | |
18786da4 SAS |
2220 | usbg_config_driver.iConfiguration = |
2221 | usbg_us_strings[USB_G_STR_CONFIG].id; | |
2222 | ||
c52661d6 SAS |
2223 | ret = usb_add_config(cdev, &usbg_config_driver, |
2224 | usbg_cfg_bind); | |
7d16e8d3 SAS |
2225 | if (ret) |
2226 | return ret; | |
2227 | usb_composite_overwrite_options(cdev, &coverwrite); | |
c52661d6 SAS |
2228 | return 0; |
2229 | } | |
2230 | ||
c94e289f | 2231 | static struct usb_composite_driver usbg_driver = { |
c52661d6 SAS |
2232 | .name = "g_target", |
2233 | .dev = &usbg_device_desc, | |
2234 | .strings = usbg_strings, | |
2235 | .max_speed = USB_SPEED_SUPER, | |
03e42bd5 | 2236 | .bind = usb_target_bind, |
c52661d6 SAS |
2237 | .unbind = guas_unbind, |
2238 | }; | |
2239 | ||
2240 | static int usbg_attach(struct usbg_tpg *tpg) | |
2241 | { | |
03e42bd5 | 2242 | return usb_composite_probe(&usbg_driver); |
c52661d6 SAS |
2243 | } |
2244 | ||
2245 | static void usbg_detach(struct usbg_tpg *tpg) | |
2246 | { | |
2247 | usb_composite_unregister(&usbg_driver); | |
2248 | } | |
2249 | ||
2250 | static int __init usb_target_gadget_init(void) | |
2251 | { | |
9ac8928e | 2252 | return target_register_template(&usbg_ops); |
c52661d6 SAS |
2253 | } |
2254 | module_init(usb_target_gadget_init); | |
2255 | ||
2256 | static void __exit usb_target_gadget_exit(void) | |
2257 | { | |
9ac8928e | 2258 | target_unregister_template(&usbg_ops); |
c52661d6 SAS |
2259 | } |
2260 | module_exit(usb_target_gadget_exit); | |
2261 | ||
2262 | MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>"); | |
2263 | MODULE_DESCRIPTION("usb-gadget fabric"); | |
2264 | MODULE_LICENSE("GPL v2"); |