Commit | Line | Data |
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08a1cb0f AP |
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> | |
19 | #include <scsi/scsi_tcq.h> | |
20 | #include <target/target_core_base.h> | |
21 | #include <target/target_core_fabric.h> | |
22 | #include <asm/unaligned.h> | |
23 | ||
24 | #include "tcm.h" | |
dc8c46a5 | 25 | #include "u_tcm.h" |
4bb8548d | 26 | #include "configfs.h" |
dc8c46a5 | 27 | |
dc8c46a5 AP |
28 | #define TPG_INSTANCES 1 |
29 | ||
30 | struct tpg_instance { | |
31 | struct usb_function_instance *func_inst; | |
32 | struct usbg_tpg *tpg; | |
33 | }; | |
34 | ||
35 | static struct tpg_instance tpg_instances[TPG_INSTANCES]; | |
36 | ||
37 | static DEFINE_MUTEX(tpg_instances_lock); | |
08a1cb0f AP |
38 | |
39 | static inline struct f_uas *to_f_uas(struct usb_function *f) | |
40 | { | |
41 | return container_of(f, struct f_uas, function); | |
42 | } | |
43 | ||
08a1cb0f AP |
44 | /* Start bot.c code */ |
45 | ||
46 | static int bot_enqueue_cmd_cbw(struct f_uas *fu) | |
47 | { | |
48 | int ret; | |
49 | ||
50 | if (fu->flags & USBG_BOT_CMD_PEND) | |
51 | return 0; | |
52 | ||
53 | ret = usb_ep_queue(fu->ep_out, fu->cmd.req, GFP_ATOMIC); | |
54 | if (!ret) | |
55 | fu->flags |= USBG_BOT_CMD_PEND; | |
56 | return ret; | |
57 | } | |
58 | ||
59 | static void bot_status_complete(struct usb_ep *ep, struct usb_request *req) | |
60 | { | |
61 | struct usbg_cmd *cmd = req->context; | |
62 | struct f_uas *fu = cmd->fu; | |
63 | ||
cff834c1 | 64 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
08a1cb0f AP |
65 | if (req->status < 0) { |
66 | pr_err("ERR %s(%d)\n", __func__, __LINE__); | |
67 | return; | |
68 | } | |
69 | ||
70 | /* CSW completed, wait for next CBW */ | |
71 | bot_enqueue_cmd_cbw(fu); | |
72 | } | |
73 | ||
74 | static void bot_enqueue_sense_code(struct f_uas *fu, struct usbg_cmd *cmd) | |
75 | { | |
76 | struct bulk_cs_wrap *csw = &fu->bot_status.csw; | |
77 | int ret; | |
08a1cb0f AP |
78 | unsigned int csw_stat; |
79 | ||
80 | csw_stat = cmd->csw_code; | |
08a1cb0f AP |
81 | csw->Tag = cmd->bot_tag; |
82 | csw->Status = csw_stat; | |
83 | fu->bot_status.req->context = cmd; | |
84 | ret = usb_ep_queue(fu->ep_in, fu->bot_status.req, GFP_ATOMIC); | |
85 | if (ret) | |
86 | pr_err("%s(%d) ERR: %d\n", __func__, __LINE__, ret); | |
87 | } | |
88 | ||
89 | static void bot_err_compl(struct usb_ep *ep, struct usb_request *req) | |
90 | { | |
91 | struct usbg_cmd *cmd = req->context; | |
92 | struct f_uas *fu = cmd->fu; | |
93 | ||
94 | if (req->status < 0) | |
95 | pr_err("ERR %s(%d)\n", __func__, __LINE__); | |
96 | ||
97 | if (cmd->data_len) { | |
98 | if (cmd->data_len > ep->maxpacket) { | |
99 | req->length = ep->maxpacket; | |
100 | cmd->data_len -= ep->maxpacket; | |
101 | } else { | |
102 | req->length = cmd->data_len; | |
103 | cmd->data_len = 0; | |
104 | } | |
105 | ||
106 | usb_ep_queue(ep, req, GFP_ATOMIC); | |
107 | return; | |
108 | } | |
109 | bot_enqueue_sense_code(fu, cmd); | |
110 | } | |
111 | ||
112 | static void bot_send_bad_status(struct usbg_cmd *cmd) | |
113 | { | |
114 | struct f_uas *fu = cmd->fu; | |
115 | struct bulk_cs_wrap *csw = &fu->bot_status.csw; | |
116 | struct usb_request *req; | |
117 | struct usb_ep *ep; | |
118 | ||
119 | csw->Residue = cpu_to_le32(cmd->data_len); | |
120 | ||
121 | if (cmd->data_len) { | |
122 | if (cmd->is_read) { | |
123 | ep = fu->ep_in; | |
124 | req = fu->bot_req_in; | |
125 | } else { | |
126 | ep = fu->ep_out; | |
127 | req = fu->bot_req_out; | |
128 | } | |
129 | ||
130 | if (cmd->data_len > fu->ep_in->maxpacket) { | |
131 | req->length = ep->maxpacket; | |
132 | cmd->data_len -= ep->maxpacket; | |
133 | } else { | |
134 | req->length = cmd->data_len; | |
135 | cmd->data_len = 0; | |
136 | } | |
137 | req->complete = bot_err_compl; | |
138 | req->context = cmd; | |
139 | req->buf = fu->cmd.buf; | |
140 | usb_ep_queue(ep, req, GFP_KERNEL); | |
141 | } else { | |
142 | bot_enqueue_sense_code(fu, cmd); | |
143 | } | |
144 | } | |
145 | ||
146 | static int bot_send_status(struct usbg_cmd *cmd, bool moved_data) | |
147 | { | |
148 | struct f_uas *fu = cmd->fu; | |
149 | struct bulk_cs_wrap *csw = &fu->bot_status.csw; | |
150 | int ret; | |
151 | ||
152 | if (cmd->se_cmd.scsi_status == SAM_STAT_GOOD) { | |
153 | if (!moved_data && cmd->data_len) { | |
154 | /* | |
155 | * the host wants to move data, we don't. Fill / empty | |
156 | * the pipe and then send the csw with reside set. | |
157 | */ | |
158 | cmd->csw_code = US_BULK_STAT_OK; | |
159 | bot_send_bad_status(cmd); | |
160 | return 0; | |
161 | } | |
162 | ||
163 | csw->Tag = cmd->bot_tag; | |
164 | csw->Residue = cpu_to_le32(0); | |
165 | csw->Status = US_BULK_STAT_OK; | |
166 | fu->bot_status.req->context = cmd; | |
167 | ||
168 | ret = usb_ep_queue(fu->ep_in, fu->bot_status.req, GFP_KERNEL); | |
169 | if (ret) | |
170 | pr_err("%s(%d) ERR: %d\n", __func__, __LINE__, ret); | |
171 | } else { | |
172 | cmd->csw_code = US_BULK_STAT_FAIL; | |
173 | bot_send_bad_status(cmd); | |
174 | } | |
175 | return 0; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Called after command (no data transfer) or after the write (to device) | |
180 | * operation is completed | |
181 | */ | |
182 | static int bot_send_status_response(struct usbg_cmd *cmd) | |
183 | { | |
184 | bool moved_data = false; | |
185 | ||
186 | if (!cmd->is_read) | |
187 | moved_data = true; | |
188 | return bot_send_status(cmd, moved_data); | |
189 | } | |
190 | ||
191 | /* Read request completed, now we have to send the CSW */ | |
192 | static void bot_read_compl(struct usb_ep *ep, struct usb_request *req) | |
193 | { | |
194 | struct usbg_cmd *cmd = req->context; | |
195 | ||
196 | if (req->status < 0) | |
197 | pr_err("ERR %s(%d)\n", __func__, __LINE__); | |
198 | ||
199 | bot_send_status(cmd, true); | |
200 | } | |
201 | ||
202 | static int bot_send_read_response(struct usbg_cmd *cmd) | |
203 | { | |
204 | struct f_uas *fu = cmd->fu; | |
205 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
206 | struct usb_gadget *gadget = fuas_to_gadget(fu); | |
207 | int ret; | |
208 | ||
209 | if (!cmd->data_len) { | |
210 | cmd->csw_code = US_BULK_STAT_PHASE; | |
211 | bot_send_bad_status(cmd); | |
212 | return 0; | |
213 | } | |
214 | ||
215 | if (!gadget->sg_supported) { | |
216 | cmd->data_buf = kmalloc(se_cmd->data_length, GFP_ATOMIC); | |
217 | if (!cmd->data_buf) | |
218 | return -ENOMEM; | |
219 | ||
220 | sg_copy_to_buffer(se_cmd->t_data_sg, | |
221 | se_cmd->t_data_nents, | |
222 | cmd->data_buf, | |
223 | se_cmd->data_length); | |
224 | ||
225 | fu->bot_req_in->buf = cmd->data_buf; | |
226 | } else { | |
227 | fu->bot_req_in->buf = NULL; | |
228 | fu->bot_req_in->num_sgs = se_cmd->t_data_nents; | |
229 | fu->bot_req_in->sg = se_cmd->t_data_sg; | |
230 | } | |
231 | ||
232 | fu->bot_req_in->complete = bot_read_compl; | |
233 | fu->bot_req_in->length = se_cmd->data_length; | |
234 | fu->bot_req_in->context = cmd; | |
235 | ret = usb_ep_queue(fu->ep_in, fu->bot_req_in, GFP_ATOMIC); | |
236 | if (ret) | |
237 | pr_err("%s(%d)\n", __func__, __LINE__); | |
238 | return 0; | |
239 | } | |
240 | ||
241 | static void usbg_data_write_cmpl(struct usb_ep *, struct usb_request *); | |
242 | static int usbg_prepare_w_request(struct usbg_cmd *, struct usb_request *); | |
243 | ||
244 | static int bot_send_write_request(struct usbg_cmd *cmd) | |
245 | { | |
246 | struct f_uas *fu = cmd->fu; | |
247 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
248 | struct usb_gadget *gadget = fuas_to_gadget(fu); | |
249 | int ret; | |
250 | ||
251 | init_completion(&cmd->write_complete); | |
252 | cmd->fu = fu; | |
253 | ||
254 | if (!cmd->data_len) { | |
255 | cmd->csw_code = US_BULK_STAT_PHASE; | |
256 | return -EINVAL; | |
257 | } | |
258 | ||
259 | if (!gadget->sg_supported) { | |
260 | cmd->data_buf = kmalloc(se_cmd->data_length, GFP_KERNEL); | |
261 | if (!cmd->data_buf) | |
262 | return -ENOMEM; | |
263 | ||
264 | fu->bot_req_out->buf = cmd->data_buf; | |
265 | } else { | |
266 | fu->bot_req_out->buf = NULL; | |
267 | fu->bot_req_out->num_sgs = se_cmd->t_data_nents; | |
268 | fu->bot_req_out->sg = se_cmd->t_data_sg; | |
269 | } | |
270 | ||
271 | fu->bot_req_out->complete = usbg_data_write_cmpl; | |
272 | fu->bot_req_out->length = se_cmd->data_length; | |
273 | fu->bot_req_out->context = cmd; | |
274 | ||
275 | ret = usbg_prepare_w_request(cmd, fu->bot_req_out); | |
276 | if (ret) | |
277 | goto cleanup; | |
278 | ret = usb_ep_queue(fu->ep_out, fu->bot_req_out, GFP_KERNEL); | |
279 | if (ret) | |
280 | pr_err("%s(%d)\n", __func__, __LINE__); | |
281 | ||
282 | wait_for_completion(&cmd->write_complete); | |
283 | target_execute_cmd(se_cmd); | |
284 | cleanup: | |
285 | return ret; | |
286 | } | |
287 | ||
288 | static int bot_submit_command(struct f_uas *, void *, unsigned int); | |
289 | ||
290 | static void bot_cmd_complete(struct usb_ep *ep, struct usb_request *req) | |
291 | { | |
292 | struct f_uas *fu = req->context; | |
293 | int ret; | |
294 | ||
295 | fu->flags &= ~USBG_BOT_CMD_PEND; | |
296 | ||
297 | if (req->status < 0) | |
298 | return; | |
299 | ||
300 | ret = bot_submit_command(fu, req->buf, req->actual); | |
301 | if (ret) | |
302 | pr_err("%s(%d): %d\n", __func__, __LINE__, ret); | |
303 | } | |
304 | ||
305 | static int bot_prepare_reqs(struct f_uas *fu) | |
306 | { | |
307 | int ret; | |
308 | ||
309 | fu->bot_req_in = usb_ep_alloc_request(fu->ep_in, GFP_KERNEL); | |
310 | if (!fu->bot_req_in) | |
311 | goto err; | |
312 | ||
313 | fu->bot_req_out = usb_ep_alloc_request(fu->ep_out, GFP_KERNEL); | |
314 | if (!fu->bot_req_out) | |
315 | goto err_out; | |
316 | ||
317 | fu->cmd.req = usb_ep_alloc_request(fu->ep_out, GFP_KERNEL); | |
318 | if (!fu->cmd.req) | |
319 | goto err_cmd; | |
320 | ||
321 | fu->bot_status.req = usb_ep_alloc_request(fu->ep_in, GFP_KERNEL); | |
322 | if (!fu->bot_status.req) | |
323 | goto err_sts; | |
324 | ||
325 | fu->bot_status.req->buf = &fu->bot_status.csw; | |
326 | fu->bot_status.req->length = US_BULK_CS_WRAP_LEN; | |
327 | fu->bot_status.req->complete = bot_status_complete; | |
328 | fu->bot_status.csw.Signature = cpu_to_le32(US_BULK_CS_SIGN); | |
329 | ||
330 | fu->cmd.buf = kmalloc(fu->ep_out->maxpacket, GFP_KERNEL); | |
331 | if (!fu->cmd.buf) | |
332 | goto err_buf; | |
333 | ||
334 | fu->cmd.req->complete = bot_cmd_complete; | |
335 | fu->cmd.req->buf = fu->cmd.buf; | |
336 | fu->cmd.req->length = fu->ep_out->maxpacket; | |
337 | fu->cmd.req->context = fu; | |
338 | ||
339 | ret = bot_enqueue_cmd_cbw(fu); | |
340 | if (ret) | |
341 | goto err_queue; | |
342 | return 0; | |
343 | err_queue: | |
344 | kfree(fu->cmd.buf); | |
345 | fu->cmd.buf = NULL; | |
346 | err_buf: | |
347 | usb_ep_free_request(fu->ep_in, fu->bot_status.req); | |
348 | err_sts: | |
349 | usb_ep_free_request(fu->ep_out, fu->cmd.req); | |
350 | fu->cmd.req = NULL; | |
351 | err_cmd: | |
352 | usb_ep_free_request(fu->ep_out, fu->bot_req_out); | |
353 | fu->bot_req_out = NULL; | |
354 | err_out: | |
355 | usb_ep_free_request(fu->ep_in, fu->bot_req_in); | |
356 | fu->bot_req_in = NULL; | |
357 | err: | |
358 | pr_err("BOT: endpoint setup failed\n"); | |
359 | return -ENOMEM; | |
360 | } | |
361 | ||
362 | static void bot_cleanup_old_alt(struct f_uas *fu) | |
363 | { | |
364 | if (!(fu->flags & USBG_ENABLED)) | |
365 | return; | |
366 | ||
367 | usb_ep_disable(fu->ep_in); | |
368 | usb_ep_disable(fu->ep_out); | |
369 | ||
370 | if (!fu->bot_req_in) | |
371 | return; | |
372 | ||
373 | usb_ep_free_request(fu->ep_in, fu->bot_req_in); | |
374 | usb_ep_free_request(fu->ep_out, fu->bot_req_out); | |
375 | usb_ep_free_request(fu->ep_out, fu->cmd.req); | |
376 | usb_ep_free_request(fu->ep_out, fu->bot_status.req); | |
377 | ||
378 | kfree(fu->cmd.buf); | |
379 | ||
380 | fu->bot_req_in = NULL; | |
381 | fu->bot_req_out = NULL; | |
382 | fu->cmd.req = NULL; | |
383 | fu->bot_status.req = NULL; | |
384 | fu->cmd.buf = NULL; | |
385 | } | |
386 | ||
387 | static void bot_set_alt(struct f_uas *fu) | |
388 | { | |
389 | struct usb_function *f = &fu->function; | |
390 | struct usb_gadget *gadget = f->config->cdev->gadget; | |
391 | int ret; | |
392 | ||
393 | fu->flags = USBG_IS_BOT; | |
394 | ||
395 | config_ep_by_speed(gadget, f, fu->ep_in); | |
396 | ret = usb_ep_enable(fu->ep_in); | |
397 | if (ret) | |
398 | goto err_b_in; | |
399 | ||
400 | config_ep_by_speed(gadget, f, fu->ep_out); | |
401 | ret = usb_ep_enable(fu->ep_out); | |
402 | if (ret) | |
403 | goto err_b_out; | |
404 | ||
405 | ret = bot_prepare_reqs(fu); | |
406 | if (ret) | |
407 | goto err_wq; | |
408 | fu->flags |= USBG_ENABLED; | |
409 | pr_info("Using the BOT protocol\n"); | |
410 | return; | |
411 | err_wq: | |
412 | usb_ep_disable(fu->ep_out); | |
413 | err_b_out: | |
414 | usb_ep_disable(fu->ep_in); | |
415 | err_b_in: | |
416 | fu->flags = USBG_IS_BOT; | |
417 | } | |
418 | ||
419 | static int usbg_bot_setup(struct usb_function *f, | |
420 | const struct usb_ctrlrequest *ctrl) | |
421 | { | |
422 | struct f_uas *fu = to_f_uas(f); | |
423 | struct usb_composite_dev *cdev = f->config->cdev; | |
424 | u16 w_value = le16_to_cpu(ctrl->wValue); | |
425 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
426 | int luns; | |
427 | u8 *ret_lun; | |
428 | ||
429 | switch (ctrl->bRequest) { | |
430 | case US_BULK_GET_MAX_LUN: | |
431 | if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_CLASS | | |
432 | USB_RECIP_INTERFACE)) | |
433 | return -ENOTSUPP; | |
434 | ||
435 | if (w_length < 1) | |
436 | return -EINVAL; | |
437 | if (w_value != 0) | |
438 | return -EINVAL; | |
439 | luns = atomic_read(&fu->tpg->tpg_port_count); | |
440 | if (!luns) { | |
441 | pr_err("No LUNs configured?\n"); | |
442 | return -EINVAL; | |
443 | } | |
444 | /* | |
445 | * If 4 LUNs are present we return 3 i.e. LUN 0..3 can be | |
446 | * accessed. The upper limit is 0xf | |
447 | */ | |
448 | luns--; | |
449 | if (luns > 0xf) { | |
450 | pr_info_once("Limiting the number of luns to 16\n"); | |
451 | luns = 0xf; | |
452 | } | |
453 | ret_lun = cdev->req->buf; | |
454 | *ret_lun = luns; | |
455 | cdev->req->length = 1; | |
456 | return usb_ep_queue(cdev->gadget->ep0, cdev->req, GFP_ATOMIC); | |
457 | ||
458 | case US_BULK_RESET_REQUEST: | |
459 | /* XXX maybe we should remove previous requests for IN + OUT */ | |
460 | bot_enqueue_cmd_cbw(fu); | |
461 | return 0; | |
462 | } | |
463 | return -ENOTSUPP; | |
464 | } | |
465 | ||
466 | /* Start uas.c code */ | |
467 | ||
468 | static void uasp_cleanup_one_stream(struct f_uas *fu, struct uas_stream *stream) | |
469 | { | |
470 | /* We have either all three allocated or none */ | |
471 | if (!stream->req_in) | |
472 | return; | |
473 | ||
474 | usb_ep_free_request(fu->ep_in, stream->req_in); | |
475 | usb_ep_free_request(fu->ep_out, stream->req_out); | |
476 | usb_ep_free_request(fu->ep_status, stream->req_status); | |
477 | ||
478 | stream->req_in = NULL; | |
479 | stream->req_out = NULL; | |
480 | stream->req_status = NULL; | |
481 | } | |
482 | ||
483 | static void uasp_free_cmdreq(struct f_uas *fu) | |
484 | { | |
485 | usb_ep_free_request(fu->ep_cmd, fu->cmd.req); | |
486 | kfree(fu->cmd.buf); | |
487 | fu->cmd.req = NULL; | |
488 | fu->cmd.buf = NULL; | |
489 | } | |
490 | ||
491 | static void uasp_cleanup_old_alt(struct f_uas *fu) | |
492 | { | |
493 | int i; | |
494 | ||
495 | if (!(fu->flags & USBG_ENABLED)) | |
496 | return; | |
497 | ||
498 | usb_ep_disable(fu->ep_in); | |
499 | usb_ep_disable(fu->ep_out); | |
500 | usb_ep_disable(fu->ep_status); | |
501 | usb_ep_disable(fu->ep_cmd); | |
502 | ||
503 | for (i = 0; i < UASP_SS_EP_COMP_NUM_STREAMS; i++) | |
504 | uasp_cleanup_one_stream(fu, &fu->stream[i]); | |
505 | uasp_free_cmdreq(fu); | |
506 | } | |
507 | ||
508 | static void uasp_status_data_cmpl(struct usb_ep *ep, struct usb_request *req); | |
509 | ||
510 | static int uasp_prepare_r_request(struct usbg_cmd *cmd) | |
511 | { | |
512 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
513 | struct f_uas *fu = cmd->fu; | |
514 | struct usb_gadget *gadget = fuas_to_gadget(fu); | |
515 | struct uas_stream *stream = cmd->stream; | |
516 | ||
517 | if (!gadget->sg_supported) { | |
518 | cmd->data_buf = kmalloc(se_cmd->data_length, GFP_ATOMIC); | |
519 | if (!cmd->data_buf) | |
520 | return -ENOMEM; | |
521 | ||
522 | sg_copy_to_buffer(se_cmd->t_data_sg, | |
523 | se_cmd->t_data_nents, | |
524 | cmd->data_buf, | |
525 | se_cmd->data_length); | |
526 | ||
527 | stream->req_in->buf = cmd->data_buf; | |
528 | } else { | |
529 | stream->req_in->buf = NULL; | |
530 | stream->req_in->num_sgs = se_cmd->t_data_nents; | |
531 | stream->req_in->sg = se_cmd->t_data_sg; | |
532 | } | |
533 | ||
534 | stream->req_in->complete = uasp_status_data_cmpl; | |
535 | stream->req_in->length = se_cmd->data_length; | |
536 | stream->req_in->context = cmd; | |
537 | ||
538 | cmd->state = UASP_SEND_STATUS; | |
539 | return 0; | |
540 | } | |
541 | ||
542 | static void uasp_prepare_status(struct usbg_cmd *cmd) | |
543 | { | |
544 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
545 | struct sense_iu *iu = &cmd->sense_iu; | |
546 | struct uas_stream *stream = cmd->stream; | |
547 | ||
548 | cmd->state = UASP_QUEUE_COMMAND; | |
549 | iu->iu_id = IU_ID_STATUS; | |
550 | iu->tag = cpu_to_be16(cmd->tag); | |
551 | ||
552 | /* | |
553 | * iu->status_qual = cpu_to_be16(STATUS QUALIFIER SAM-4. Where R U?); | |
554 | */ | |
555 | iu->len = cpu_to_be16(se_cmd->scsi_sense_length); | |
556 | iu->status = se_cmd->scsi_status; | |
557 | stream->req_status->context = cmd; | |
558 | stream->req_status->length = se_cmd->scsi_sense_length + 16; | |
559 | stream->req_status->buf = iu; | |
560 | stream->req_status->complete = uasp_status_data_cmpl; | |
561 | } | |
562 | ||
563 | static void uasp_status_data_cmpl(struct usb_ep *ep, struct usb_request *req) | |
564 | { | |
565 | struct usbg_cmd *cmd = req->context; | |
566 | struct uas_stream *stream = cmd->stream; | |
567 | struct f_uas *fu = cmd->fu; | |
568 | int ret; | |
569 | ||
570 | if (req->status < 0) | |
571 | goto cleanup; | |
572 | ||
573 | switch (cmd->state) { | |
574 | case UASP_SEND_DATA: | |
575 | ret = uasp_prepare_r_request(cmd); | |
576 | if (ret) | |
577 | goto cleanup; | |
578 | ret = usb_ep_queue(fu->ep_in, stream->req_in, GFP_ATOMIC); | |
579 | if (ret) | |
580 | pr_err("%s(%d) => %d\n", __func__, __LINE__, ret); | |
581 | break; | |
582 | ||
583 | case UASP_RECEIVE_DATA: | |
584 | ret = usbg_prepare_w_request(cmd, stream->req_out); | |
585 | if (ret) | |
586 | goto cleanup; | |
587 | ret = usb_ep_queue(fu->ep_out, stream->req_out, GFP_ATOMIC); | |
588 | if (ret) | |
589 | pr_err("%s(%d) => %d\n", __func__, __LINE__, ret); | |
590 | break; | |
591 | ||
592 | case UASP_SEND_STATUS: | |
593 | uasp_prepare_status(cmd); | |
594 | ret = usb_ep_queue(fu->ep_status, stream->req_status, | |
595 | GFP_ATOMIC); | |
596 | if (ret) | |
597 | pr_err("%s(%d) => %d\n", __func__, __LINE__, ret); | |
598 | break; | |
599 | ||
600 | case UASP_QUEUE_COMMAND: | |
cff834c1 | 601 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
08a1cb0f AP |
602 | usb_ep_queue(fu->ep_cmd, fu->cmd.req, GFP_ATOMIC); |
603 | break; | |
604 | ||
605 | default: | |
606 | BUG(); | |
607 | } | |
608 | return; | |
609 | ||
610 | cleanup: | |
cff834c1 | 611 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
08a1cb0f AP |
612 | } |
613 | ||
614 | static int uasp_send_status_response(struct usbg_cmd *cmd) | |
615 | { | |
616 | struct f_uas *fu = cmd->fu; | |
617 | struct uas_stream *stream = cmd->stream; | |
618 | struct sense_iu *iu = &cmd->sense_iu; | |
619 | ||
620 | iu->tag = cpu_to_be16(cmd->tag); | |
621 | stream->req_status->complete = uasp_status_data_cmpl; | |
622 | stream->req_status->context = cmd; | |
623 | cmd->fu = fu; | |
624 | uasp_prepare_status(cmd); | |
625 | return usb_ep_queue(fu->ep_status, stream->req_status, GFP_ATOMIC); | |
626 | } | |
627 | ||
628 | static int uasp_send_read_response(struct usbg_cmd *cmd) | |
629 | { | |
630 | struct f_uas *fu = cmd->fu; | |
631 | struct uas_stream *stream = cmd->stream; | |
632 | struct sense_iu *iu = &cmd->sense_iu; | |
633 | int ret; | |
634 | ||
635 | cmd->fu = fu; | |
636 | ||
637 | iu->tag = cpu_to_be16(cmd->tag); | |
638 | if (fu->flags & USBG_USE_STREAMS) { | |
639 | ||
640 | ret = uasp_prepare_r_request(cmd); | |
641 | if (ret) | |
642 | goto out; | |
643 | ret = usb_ep_queue(fu->ep_in, stream->req_in, GFP_ATOMIC); | |
644 | if (ret) { | |
645 | pr_err("%s(%d) => %d\n", __func__, __LINE__, ret); | |
646 | kfree(cmd->data_buf); | |
647 | cmd->data_buf = NULL; | |
648 | } | |
649 | ||
650 | } else { | |
651 | ||
652 | iu->iu_id = IU_ID_READ_READY; | |
653 | iu->tag = cpu_to_be16(cmd->tag); | |
654 | ||
655 | stream->req_status->complete = uasp_status_data_cmpl; | |
656 | stream->req_status->context = cmd; | |
657 | ||
658 | cmd->state = UASP_SEND_DATA; | |
659 | stream->req_status->buf = iu; | |
660 | stream->req_status->length = sizeof(struct iu); | |
661 | ||
662 | ret = usb_ep_queue(fu->ep_status, stream->req_status, | |
663 | GFP_ATOMIC); | |
664 | if (ret) | |
665 | pr_err("%s(%d) => %d\n", __func__, __LINE__, ret); | |
666 | } | |
667 | out: | |
668 | return ret; | |
669 | } | |
670 | ||
671 | static int uasp_send_write_request(struct usbg_cmd *cmd) | |
672 | { | |
673 | struct f_uas *fu = cmd->fu; | |
674 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
675 | struct uas_stream *stream = cmd->stream; | |
676 | struct sense_iu *iu = &cmd->sense_iu; | |
677 | int ret; | |
678 | ||
679 | init_completion(&cmd->write_complete); | |
680 | cmd->fu = fu; | |
681 | ||
682 | iu->tag = cpu_to_be16(cmd->tag); | |
683 | ||
684 | if (fu->flags & USBG_USE_STREAMS) { | |
685 | ||
686 | ret = usbg_prepare_w_request(cmd, stream->req_out); | |
687 | if (ret) | |
688 | goto cleanup; | |
689 | ret = usb_ep_queue(fu->ep_out, stream->req_out, GFP_ATOMIC); | |
690 | if (ret) | |
691 | pr_err("%s(%d)\n", __func__, __LINE__); | |
692 | ||
693 | } else { | |
694 | ||
695 | iu->iu_id = IU_ID_WRITE_READY; | |
696 | iu->tag = cpu_to_be16(cmd->tag); | |
697 | ||
698 | stream->req_status->complete = uasp_status_data_cmpl; | |
699 | stream->req_status->context = cmd; | |
700 | ||
701 | cmd->state = UASP_RECEIVE_DATA; | |
702 | stream->req_status->buf = iu; | |
703 | stream->req_status->length = sizeof(struct iu); | |
704 | ||
705 | ret = usb_ep_queue(fu->ep_status, stream->req_status, | |
706 | GFP_ATOMIC); | |
707 | if (ret) | |
708 | pr_err("%s(%d)\n", __func__, __LINE__); | |
709 | } | |
710 | ||
711 | wait_for_completion(&cmd->write_complete); | |
712 | target_execute_cmd(se_cmd); | |
713 | cleanup: | |
714 | return ret; | |
715 | } | |
716 | ||
717 | static int usbg_submit_command(struct f_uas *, void *, unsigned int); | |
718 | ||
719 | static void uasp_cmd_complete(struct usb_ep *ep, struct usb_request *req) | |
720 | { | |
721 | struct f_uas *fu = req->context; | |
722 | int ret; | |
723 | ||
724 | if (req->status < 0) | |
725 | return; | |
726 | ||
727 | ret = usbg_submit_command(fu, req->buf, req->actual); | |
728 | /* | |
729 | * Once we tune for performance enqueue the command req here again so | |
730 | * we can receive a second command while we processing this one. Pay | |
731 | * attention to properly sync STAUS endpoint with DATA IN + OUT so you | |
732 | * don't break HS. | |
733 | */ | |
734 | if (!ret) | |
735 | return; | |
736 | usb_ep_queue(fu->ep_cmd, fu->cmd.req, GFP_ATOMIC); | |
737 | } | |
738 | ||
739 | static int uasp_alloc_stream_res(struct f_uas *fu, struct uas_stream *stream) | |
740 | { | |
741 | stream->req_in = usb_ep_alloc_request(fu->ep_in, GFP_KERNEL); | |
742 | if (!stream->req_in) | |
743 | goto out; | |
744 | ||
745 | stream->req_out = usb_ep_alloc_request(fu->ep_out, GFP_KERNEL); | |
746 | if (!stream->req_out) | |
747 | goto err_out; | |
748 | ||
749 | stream->req_status = usb_ep_alloc_request(fu->ep_status, GFP_KERNEL); | |
750 | if (!stream->req_status) | |
751 | goto err_sts; | |
752 | ||
753 | return 0; | |
754 | err_sts: | |
755 | usb_ep_free_request(fu->ep_status, stream->req_status); | |
756 | stream->req_status = NULL; | |
757 | err_out: | |
758 | usb_ep_free_request(fu->ep_out, stream->req_out); | |
759 | stream->req_out = NULL; | |
760 | out: | |
761 | return -ENOMEM; | |
762 | } | |
763 | ||
764 | static int uasp_alloc_cmd(struct f_uas *fu) | |
765 | { | |
766 | fu->cmd.req = usb_ep_alloc_request(fu->ep_cmd, GFP_KERNEL); | |
767 | if (!fu->cmd.req) | |
768 | goto err; | |
769 | ||
770 | fu->cmd.buf = kmalloc(fu->ep_cmd->maxpacket, GFP_KERNEL); | |
771 | if (!fu->cmd.buf) | |
772 | goto err_buf; | |
773 | ||
774 | fu->cmd.req->complete = uasp_cmd_complete; | |
775 | fu->cmd.req->buf = fu->cmd.buf; | |
776 | fu->cmd.req->length = fu->ep_cmd->maxpacket; | |
777 | fu->cmd.req->context = fu; | |
778 | return 0; | |
779 | ||
780 | err_buf: | |
781 | usb_ep_free_request(fu->ep_cmd, fu->cmd.req); | |
782 | err: | |
783 | return -ENOMEM; | |
784 | } | |
785 | ||
786 | static void uasp_setup_stream_res(struct f_uas *fu, int max_streams) | |
787 | { | |
788 | int i; | |
789 | ||
790 | for (i = 0; i < max_streams; i++) { | |
791 | struct uas_stream *s = &fu->stream[i]; | |
792 | ||
793 | s->req_in->stream_id = i + 1; | |
794 | s->req_out->stream_id = i + 1; | |
795 | s->req_status->stream_id = i + 1; | |
796 | } | |
797 | } | |
798 | ||
799 | static int uasp_prepare_reqs(struct f_uas *fu) | |
800 | { | |
801 | int ret; | |
802 | int i; | |
803 | int max_streams; | |
804 | ||
805 | if (fu->flags & USBG_USE_STREAMS) | |
806 | max_streams = UASP_SS_EP_COMP_NUM_STREAMS; | |
807 | else | |
808 | max_streams = 1; | |
809 | ||
810 | for (i = 0; i < max_streams; i++) { | |
811 | ret = uasp_alloc_stream_res(fu, &fu->stream[i]); | |
812 | if (ret) | |
813 | goto err_cleanup; | |
814 | } | |
815 | ||
816 | ret = uasp_alloc_cmd(fu); | |
817 | if (ret) | |
818 | goto err_free_stream; | |
819 | uasp_setup_stream_res(fu, max_streams); | |
820 | ||
821 | ret = usb_ep_queue(fu->ep_cmd, fu->cmd.req, GFP_ATOMIC); | |
822 | if (ret) | |
823 | goto err_free_stream; | |
824 | ||
825 | return 0; | |
826 | ||
827 | err_free_stream: | |
828 | uasp_free_cmdreq(fu); | |
829 | ||
830 | err_cleanup: | |
831 | if (i) { | |
832 | do { | |
833 | uasp_cleanup_one_stream(fu, &fu->stream[i - 1]); | |
834 | i--; | |
835 | } while (i); | |
836 | } | |
837 | pr_err("UASP: endpoint setup failed\n"); | |
838 | return ret; | |
839 | } | |
840 | ||
841 | static void uasp_set_alt(struct f_uas *fu) | |
842 | { | |
843 | struct usb_function *f = &fu->function; | |
844 | struct usb_gadget *gadget = f->config->cdev->gadget; | |
845 | int ret; | |
846 | ||
847 | fu->flags = USBG_IS_UAS; | |
848 | ||
849 | if (gadget->speed == USB_SPEED_SUPER) | |
850 | fu->flags |= USBG_USE_STREAMS; | |
851 | ||
852 | config_ep_by_speed(gadget, f, fu->ep_in); | |
853 | ret = usb_ep_enable(fu->ep_in); | |
854 | if (ret) | |
855 | goto err_b_in; | |
856 | ||
857 | config_ep_by_speed(gadget, f, fu->ep_out); | |
858 | ret = usb_ep_enable(fu->ep_out); | |
859 | if (ret) | |
860 | goto err_b_out; | |
861 | ||
862 | config_ep_by_speed(gadget, f, fu->ep_cmd); | |
863 | ret = usb_ep_enable(fu->ep_cmd); | |
864 | if (ret) | |
865 | goto err_cmd; | |
866 | config_ep_by_speed(gadget, f, fu->ep_status); | |
867 | ret = usb_ep_enable(fu->ep_status); | |
868 | if (ret) | |
869 | goto err_status; | |
870 | ||
871 | ret = uasp_prepare_reqs(fu); | |
872 | if (ret) | |
873 | goto err_wq; | |
874 | fu->flags |= USBG_ENABLED; | |
875 | ||
876 | pr_info("Using the UAS protocol\n"); | |
877 | return; | |
878 | err_wq: | |
879 | usb_ep_disable(fu->ep_status); | |
880 | err_status: | |
881 | usb_ep_disable(fu->ep_cmd); | |
882 | err_cmd: | |
883 | usb_ep_disable(fu->ep_out); | |
884 | err_b_out: | |
885 | usb_ep_disable(fu->ep_in); | |
886 | err_b_in: | |
887 | fu->flags = 0; | |
888 | } | |
889 | ||
890 | static int get_cmd_dir(const unsigned char *cdb) | |
891 | { | |
892 | int ret; | |
893 | ||
894 | switch (cdb[0]) { | |
895 | case READ_6: | |
896 | case READ_10: | |
897 | case READ_12: | |
898 | case READ_16: | |
899 | case INQUIRY: | |
900 | case MODE_SENSE: | |
901 | case MODE_SENSE_10: | |
902 | case SERVICE_ACTION_IN_16: | |
903 | case MAINTENANCE_IN: | |
904 | case PERSISTENT_RESERVE_IN: | |
905 | case SECURITY_PROTOCOL_IN: | |
906 | case ACCESS_CONTROL_IN: | |
907 | case REPORT_LUNS: | |
908 | case READ_BLOCK_LIMITS: | |
909 | case READ_POSITION: | |
910 | case READ_CAPACITY: | |
911 | case READ_TOC: | |
912 | case READ_FORMAT_CAPACITIES: | |
913 | case REQUEST_SENSE: | |
914 | ret = DMA_FROM_DEVICE; | |
915 | break; | |
916 | ||
917 | case WRITE_6: | |
918 | case WRITE_10: | |
919 | case WRITE_12: | |
920 | case WRITE_16: | |
921 | case MODE_SELECT: | |
922 | case MODE_SELECT_10: | |
923 | case WRITE_VERIFY: | |
924 | case WRITE_VERIFY_12: | |
925 | case PERSISTENT_RESERVE_OUT: | |
926 | case MAINTENANCE_OUT: | |
927 | case SECURITY_PROTOCOL_OUT: | |
928 | case ACCESS_CONTROL_OUT: | |
929 | ret = DMA_TO_DEVICE; | |
930 | break; | |
931 | case ALLOW_MEDIUM_REMOVAL: | |
932 | case TEST_UNIT_READY: | |
933 | case SYNCHRONIZE_CACHE: | |
934 | case START_STOP: | |
935 | case ERASE: | |
936 | case REZERO_UNIT: | |
937 | case SEEK_10: | |
938 | case SPACE: | |
939 | case VERIFY: | |
940 | case WRITE_FILEMARKS: | |
941 | ret = DMA_NONE; | |
942 | break; | |
943 | default: | |
944 | #define CMD_DIR_MSG "target: Unknown data direction for SCSI Opcode 0x%02x\n" | |
945 | pr_warn(CMD_DIR_MSG, cdb[0]); | |
946 | #undef CMD_DIR_MSG | |
947 | ret = -EINVAL; | |
948 | } | |
949 | return ret; | |
950 | } | |
951 | ||
952 | static void usbg_data_write_cmpl(struct usb_ep *ep, struct usb_request *req) | |
953 | { | |
954 | struct usbg_cmd *cmd = req->context; | |
955 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
956 | ||
957 | if (req->status < 0) { | |
958 | pr_err("%s() state %d transfer failed\n", __func__, cmd->state); | |
959 | goto cleanup; | |
960 | } | |
961 | ||
962 | if (req->num_sgs == 0) { | |
963 | sg_copy_from_buffer(se_cmd->t_data_sg, | |
964 | se_cmd->t_data_nents, | |
965 | cmd->data_buf, | |
966 | se_cmd->data_length); | |
967 | } | |
968 | ||
969 | complete(&cmd->write_complete); | |
970 | return; | |
971 | ||
972 | cleanup: | |
cff834c1 | 973 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
08a1cb0f AP |
974 | } |
975 | ||
976 | static int usbg_prepare_w_request(struct usbg_cmd *cmd, struct usb_request *req) | |
977 | { | |
978 | struct se_cmd *se_cmd = &cmd->se_cmd; | |
979 | struct f_uas *fu = cmd->fu; | |
980 | struct usb_gadget *gadget = fuas_to_gadget(fu); | |
981 | ||
982 | if (!gadget->sg_supported) { | |
983 | cmd->data_buf = kmalloc(se_cmd->data_length, GFP_ATOMIC); | |
984 | if (!cmd->data_buf) | |
985 | return -ENOMEM; | |
986 | ||
987 | req->buf = cmd->data_buf; | |
988 | } else { | |
989 | req->buf = NULL; | |
990 | req->num_sgs = se_cmd->t_data_nents; | |
991 | req->sg = se_cmd->t_data_sg; | |
992 | } | |
993 | ||
994 | req->complete = usbg_data_write_cmpl; | |
995 | req->length = se_cmd->data_length; | |
996 | req->context = cmd; | |
997 | return 0; | |
998 | } | |
999 | ||
1000 | static int usbg_send_status_response(struct se_cmd *se_cmd) | |
1001 | { | |
1002 | struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd, | |
1003 | se_cmd); | |
1004 | struct f_uas *fu = cmd->fu; | |
1005 | ||
1006 | if (fu->flags & USBG_IS_BOT) | |
1007 | return bot_send_status_response(cmd); | |
1008 | else | |
1009 | return uasp_send_status_response(cmd); | |
1010 | } | |
1011 | ||
1012 | static int usbg_send_write_request(struct se_cmd *se_cmd) | |
1013 | { | |
1014 | struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd, | |
1015 | se_cmd); | |
1016 | struct f_uas *fu = cmd->fu; | |
1017 | ||
1018 | if (fu->flags & USBG_IS_BOT) | |
1019 | return bot_send_write_request(cmd); | |
1020 | else | |
1021 | return uasp_send_write_request(cmd); | |
1022 | } | |
1023 | ||
1024 | static int usbg_send_read_response(struct se_cmd *se_cmd) | |
1025 | { | |
1026 | struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd, | |
1027 | se_cmd); | |
1028 | struct f_uas *fu = cmd->fu; | |
1029 | ||
1030 | if (fu->flags & USBG_IS_BOT) | |
1031 | return bot_send_read_response(cmd); | |
1032 | else | |
1033 | return uasp_send_read_response(cmd); | |
1034 | } | |
1035 | ||
1036 | static void usbg_cmd_work(struct work_struct *work) | |
1037 | { | |
1038 | struct usbg_cmd *cmd = container_of(work, struct usbg_cmd, work); | |
1039 | struct se_cmd *se_cmd; | |
1040 | struct tcm_usbg_nexus *tv_nexus; | |
1041 | struct usbg_tpg *tpg; | |
cff834c1 | 1042 | int dir, flags = (TARGET_SCF_UNKNOWN_SIZE | TARGET_SCF_ACK_KREF); |
08a1cb0f AP |
1043 | |
1044 | se_cmd = &cmd->se_cmd; | |
1045 | tpg = cmd->fu->tpg; | |
1046 | tv_nexus = tpg->tpg_nexus; | |
1047 | dir = get_cmd_dir(cmd->cmd_buf); | |
1048 | if (dir < 0) { | |
1049 | transport_init_se_cmd(se_cmd, | |
1050 | tv_nexus->tvn_se_sess->se_tpg->se_tpg_tfo, | |
1051 | tv_nexus->tvn_se_sess, cmd->data_len, DMA_NONE, | |
1052 | cmd->prio_attr, cmd->sense_iu.sense); | |
1053 | goto out; | |
1054 | } | |
1055 | ||
cff834c1 NB |
1056 | if (target_submit_cmd(se_cmd, tv_nexus->tvn_se_sess, cmd->cmd_buf, |
1057 | cmd->sense_iu.sense, cmd->unpacked_lun, 0, | |
1058 | cmd->prio_attr, dir, flags) < 0) | |
08a1cb0f AP |
1059 | goto out; |
1060 | ||
1061 | return; | |
1062 | ||
1063 | out: | |
1064 | transport_send_check_condition_and_sense(se_cmd, | |
1065 | TCM_UNSUPPORTED_SCSI_OPCODE, 1); | |
cff834c1 | 1066 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
08a1cb0f AP |
1067 | } |
1068 | ||
71e7ae8e NB |
1069 | static struct usbg_cmd *usbg_get_cmd(struct f_uas *fu, |
1070 | struct tcm_usbg_nexus *tv_nexus, u32 scsi_tag) | |
1071 | { | |
1072 | struct se_session *se_sess = tv_nexus->tvn_se_sess; | |
1073 | struct usbg_cmd *cmd; | |
1074 | int tag; | |
1075 | ||
1076 | tag = percpu_ida_alloc(&se_sess->sess_tag_pool, GFP_ATOMIC); | |
1077 | if (tag < 0) | |
1078 | return ERR_PTR(-ENOMEM); | |
1079 | ||
1080 | cmd = &((struct usbg_cmd *)se_sess->sess_cmd_map)[tag]; | |
1081 | memset(cmd, 0, sizeof(*cmd)); | |
1082 | cmd->se_cmd.map_tag = tag; | |
1083 | cmd->se_cmd.tag = cmd->tag = scsi_tag; | |
1084 | cmd->fu = fu; | |
1085 | ||
1086 | return cmd; | |
1087 | } | |
1088 | ||
1089 | static void usbg_release_cmd(struct se_cmd *); | |
1090 | ||
08a1cb0f AP |
1091 | static int usbg_submit_command(struct f_uas *fu, |
1092 | void *cmdbuf, unsigned int len) | |
1093 | { | |
1094 | struct command_iu *cmd_iu = cmdbuf; | |
1095 | struct usbg_cmd *cmd; | |
71e7ae8e NB |
1096 | struct usbg_tpg *tpg = fu->tpg; |
1097 | struct tcm_usbg_nexus *tv_nexus = tpg->tpg_nexus; | |
08a1cb0f | 1098 | u32 cmd_len; |
71e7ae8e | 1099 | u16 scsi_tag; |
08a1cb0f AP |
1100 | |
1101 | if (cmd_iu->iu_id != IU_ID_COMMAND) { | |
1102 | pr_err("Unsupported type %d\n", cmd_iu->iu_id); | |
1103 | return -EINVAL; | |
1104 | } | |
1105 | ||
71e7ae8e NB |
1106 | tv_nexus = tpg->tpg_nexus; |
1107 | if (!tv_nexus) { | |
1108 | pr_err("Missing nexus, ignoring command\n"); | |
1109 | return -EINVAL; | |
1110 | } | |
08a1cb0f | 1111 | |
08a1cb0f AP |
1112 | cmd_len = (cmd_iu->len & ~0x3) + 16; |
1113 | if (cmd_len > USBG_MAX_CMD) | |
71e7ae8e | 1114 | return -EINVAL; |
08a1cb0f | 1115 | |
71e7ae8e NB |
1116 | scsi_tag = be16_to_cpup(&cmd_iu->tag); |
1117 | cmd = usbg_get_cmd(fu, tv_nexus, scsi_tag); | |
1118 | if (IS_ERR(cmd)) { | |
1119 | pr_err("usbg_get_cmd failed\n"); | |
1120 | return -ENOMEM; | |
1121 | } | |
08a1cb0f AP |
1122 | memcpy(cmd->cmd_buf, cmd_iu->cdb, cmd_len); |
1123 | ||
08a1cb0f AP |
1124 | if (fu->flags & USBG_USE_STREAMS) { |
1125 | if (cmd->tag > UASP_SS_EP_COMP_NUM_STREAMS) | |
1126 | goto err; | |
1127 | if (!cmd->tag) | |
1128 | cmd->stream = &fu->stream[0]; | |
1129 | else | |
1130 | cmd->stream = &fu->stream[cmd->tag - 1]; | |
1131 | } else { | |
1132 | cmd->stream = &fu->stream[0]; | |
1133 | } | |
1134 | ||
08a1cb0f AP |
1135 | switch (cmd_iu->prio_attr & 0x7) { |
1136 | case UAS_HEAD_TAG: | |
1137 | cmd->prio_attr = TCM_HEAD_TAG; | |
1138 | break; | |
1139 | case UAS_ORDERED_TAG: | |
1140 | cmd->prio_attr = TCM_ORDERED_TAG; | |
1141 | break; | |
1142 | case UAS_ACA: | |
1143 | cmd->prio_attr = TCM_ACA_TAG; | |
1144 | break; | |
1145 | default: | |
1146 | pr_debug_once("Unsupported prio_attr: %02x.\n", | |
1147 | cmd_iu->prio_attr); | |
1148 | case UAS_SIMPLE_TAG: | |
1149 | cmd->prio_attr = TCM_SIMPLE_TAG; | |
1150 | break; | |
1151 | } | |
1152 | ||
08a1cb0f AP |
1153 | cmd->unpacked_lun = scsilun_to_int(&cmd_iu->lun); |
1154 | ||
1155 | INIT_WORK(&cmd->work, usbg_cmd_work); | |
1156 | queue_work(tpg->workqueue, &cmd->work); | |
1157 | ||
1158 | return 0; | |
1159 | err: | |
71e7ae8e | 1160 | usbg_release_cmd(&cmd->se_cmd); |
08a1cb0f AP |
1161 | return -EINVAL; |
1162 | } | |
1163 | ||
1164 | static void bot_cmd_work(struct work_struct *work) | |
1165 | { | |
1166 | struct usbg_cmd *cmd = container_of(work, struct usbg_cmd, work); | |
1167 | struct se_cmd *se_cmd; | |
1168 | struct tcm_usbg_nexus *tv_nexus; | |
1169 | struct usbg_tpg *tpg; | |
1170 | int dir; | |
1171 | ||
1172 | se_cmd = &cmd->se_cmd; | |
1173 | tpg = cmd->fu->tpg; | |
1174 | tv_nexus = tpg->tpg_nexus; | |
1175 | dir = get_cmd_dir(cmd->cmd_buf); | |
1176 | if (dir < 0) { | |
1177 | transport_init_se_cmd(se_cmd, | |
1178 | tv_nexus->tvn_se_sess->se_tpg->se_tpg_tfo, | |
1179 | tv_nexus->tvn_se_sess, cmd->data_len, DMA_NONE, | |
1180 | cmd->prio_attr, cmd->sense_iu.sense); | |
1181 | goto out; | |
1182 | } | |
1183 | ||
1184 | if (target_submit_cmd(se_cmd, tv_nexus->tvn_se_sess, | |
1185 | cmd->cmd_buf, cmd->sense_iu.sense, cmd->unpacked_lun, | |
1186 | cmd->data_len, cmd->prio_attr, dir, 0) < 0) | |
1187 | goto out; | |
1188 | ||
1189 | return; | |
1190 | ||
1191 | out: | |
1192 | transport_send_check_condition_and_sense(se_cmd, | |
1193 | TCM_UNSUPPORTED_SCSI_OPCODE, 1); | |
cff834c1 | 1194 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
08a1cb0f AP |
1195 | } |
1196 | ||
1197 | static int bot_submit_command(struct f_uas *fu, | |
1198 | void *cmdbuf, unsigned int len) | |
1199 | { | |
1200 | struct bulk_cb_wrap *cbw = cmdbuf; | |
1201 | struct usbg_cmd *cmd; | |
71e7ae8e | 1202 | struct usbg_tpg *tpg = fu->tpg; |
08a1cb0f AP |
1203 | struct tcm_usbg_nexus *tv_nexus; |
1204 | u32 cmd_len; | |
1205 | ||
1206 | if (cbw->Signature != cpu_to_le32(US_BULK_CB_SIGN)) { | |
1207 | pr_err("Wrong signature on CBW\n"); | |
1208 | return -EINVAL; | |
1209 | } | |
1210 | if (len != 31) { | |
1211 | pr_err("Wrong length for CBW\n"); | |
1212 | return -EINVAL; | |
1213 | } | |
1214 | ||
1215 | cmd_len = cbw->Length; | |
1216 | if (cmd_len < 1 || cmd_len > 16) | |
1217 | return -EINVAL; | |
1218 | ||
08a1cb0f AP |
1219 | tv_nexus = tpg->tpg_nexus; |
1220 | if (!tv_nexus) { | |
1221 | pr_err("Missing nexus, ignoring command\n"); | |
71e7ae8e | 1222 | return -ENODEV; |
08a1cb0f AP |
1223 | } |
1224 | ||
71e7ae8e NB |
1225 | cmd = usbg_get_cmd(fu, tv_nexus, cbw->Tag); |
1226 | if (IS_ERR(cmd)) { | |
1227 | pr_err("usbg_get_cmd failed\n"); | |
1228 | return -ENOMEM; | |
1229 | } | |
08a1cb0f AP |
1230 | memcpy(cmd->cmd_buf, cbw->CDB, cmd_len); |
1231 | ||
1232 | cmd->bot_tag = cbw->Tag; | |
08a1cb0f | 1233 | cmd->prio_attr = TCM_SIMPLE_TAG; |
08a1cb0f AP |
1234 | cmd->unpacked_lun = cbw->Lun; |
1235 | cmd->is_read = cbw->Flags & US_BULK_FLAG_IN ? 1 : 0; | |
1236 | cmd->data_len = le32_to_cpu(cbw->DataTransferLength); | |
1237 | cmd->se_cmd.tag = le32_to_cpu(cmd->bot_tag); | |
1238 | ||
1239 | INIT_WORK(&cmd->work, bot_cmd_work); | |
1240 | queue_work(tpg->workqueue, &cmd->work); | |
1241 | ||
1242 | return 0; | |
08a1cb0f AP |
1243 | } |
1244 | ||
1245 | /* Start fabric.c code */ | |
1246 | ||
1247 | static int usbg_check_true(struct se_portal_group *se_tpg) | |
1248 | { | |
1249 | return 1; | |
1250 | } | |
1251 | ||
1252 | static int usbg_check_false(struct se_portal_group *se_tpg) | |
1253 | { | |
1254 | return 0; | |
1255 | } | |
1256 | ||
1257 | static char *usbg_get_fabric_name(void) | |
1258 | { | |
1259 | return "usb_gadget"; | |
1260 | } | |
1261 | ||
1262 | static char *usbg_get_fabric_wwn(struct se_portal_group *se_tpg) | |
1263 | { | |
1264 | struct usbg_tpg *tpg = container_of(se_tpg, | |
1265 | struct usbg_tpg, se_tpg); | |
1266 | struct usbg_tport *tport = tpg->tport; | |
1267 | ||
1268 | return &tport->tport_name[0]; | |
1269 | } | |
1270 | ||
1271 | static u16 usbg_get_tag(struct se_portal_group *se_tpg) | |
1272 | { | |
1273 | struct usbg_tpg *tpg = container_of(se_tpg, | |
1274 | struct usbg_tpg, se_tpg); | |
1275 | return tpg->tport_tpgt; | |
1276 | } | |
1277 | ||
1278 | static u32 usbg_tpg_get_inst_index(struct se_portal_group *se_tpg) | |
1279 | { | |
1280 | return 1; | |
1281 | } | |
1282 | ||
08a1cb0f AP |
1283 | static void usbg_release_cmd(struct se_cmd *se_cmd) |
1284 | { | |
1285 | struct usbg_cmd *cmd = container_of(se_cmd, struct usbg_cmd, | |
1286 | se_cmd); | |
71e7ae8e NB |
1287 | struct se_session *se_sess = se_cmd->se_sess; |
1288 | ||
08a1cb0f | 1289 | kfree(cmd->data_buf); |
71e7ae8e | 1290 | percpu_ida_free(&se_sess->sess_tag_pool, se_cmd->map_tag); |
08a1cb0f AP |
1291 | } |
1292 | ||
08a1cb0f AP |
1293 | static u32 usbg_sess_get_index(struct se_session *se_sess) |
1294 | { | |
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | /* | |
1299 | * XXX Error recovery: return != 0 if we expect writes. Dunno when that could be | |
1300 | */ | |
1301 | static int usbg_write_pending_status(struct se_cmd *se_cmd) | |
1302 | { | |
1303 | return 0; | |
1304 | } | |
1305 | ||
1306 | static void usbg_set_default_node_attrs(struct se_node_acl *nacl) | |
1307 | { | |
1308 | } | |
1309 | ||
1310 | static int usbg_get_cmd_state(struct se_cmd *se_cmd) | |
1311 | { | |
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | static void usbg_queue_tm_rsp(struct se_cmd *se_cmd) | |
1316 | { | |
1317 | } | |
1318 | ||
1319 | static void usbg_aborted_task(struct se_cmd *se_cmd) | |
1320 | { | |
1321 | } | |
1322 | ||
1323 | static const char *usbg_check_wwn(const char *name) | |
1324 | { | |
1325 | const char *n; | |
1326 | unsigned int len; | |
1327 | ||
1328 | n = strstr(name, "naa."); | |
1329 | if (!n) | |
1330 | return NULL; | |
1331 | n += 4; | |
1332 | len = strlen(n); | |
1333 | if (len == 0 || len > USBG_NAMELEN - 1) | |
1334 | return NULL; | |
1335 | return n; | |
1336 | } | |
1337 | ||
1338 | static int usbg_init_nodeacl(struct se_node_acl *se_nacl, const char *name) | |
1339 | { | |
1340 | if (!usbg_check_wwn(name)) | |
1341 | return -EINVAL; | |
1342 | return 0; | |
1343 | } | |
1344 | ||
08a1cb0f AP |
1345 | static struct se_portal_group *usbg_make_tpg( |
1346 | struct se_wwn *wwn, | |
1347 | struct config_group *group, | |
1348 | const char *name) | |
1349 | { | |
1350 | struct usbg_tport *tport = container_of(wwn, struct usbg_tport, | |
1351 | tport_wwn); | |
1352 | struct usbg_tpg *tpg; | |
1353 | unsigned long tpgt; | |
1354 | int ret; | |
dc8c46a5 AP |
1355 | struct f_tcm_opts *opts; |
1356 | unsigned i; | |
08a1cb0f AP |
1357 | |
1358 | if (strstr(name, "tpgt_") != name) | |
1359 | return ERR_PTR(-EINVAL); | |
1360 | if (kstrtoul(name + 5, 0, &tpgt) || tpgt > UINT_MAX) | |
1361 | return ERR_PTR(-EINVAL); | |
dc8c46a5 AP |
1362 | ret = -ENODEV; |
1363 | mutex_lock(&tpg_instances_lock); | |
1364 | for (i = 0; i < TPG_INSTANCES; ++i) | |
1365 | if (tpg_instances[i].func_inst && !tpg_instances[i].tpg) | |
1366 | break; | |
1367 | if (i == TPG_INSTANCES) | |
1368 | goto unlock_inst; | |
1369 | ||
1370 | opts = container_of(tpg_instances[i].func_inst, struct f_tcm_opts, | |
1371 | func_inst); | |
1372 | mutex_lock(&opts->dep_lock); | |
1373 | if (!opts->ready) | |
1374 | goto unlock_dep; | |
1375 | ||
4bb8548d AP |
1376 | if (opts->has_dep) { |
1377 | if (!try_module_get(opts->dependent)) | |
1378 | goto unlock_dep; | |
1379 | } else { | |
1380 | ret = configfs_depend_item_unlocked( | |
1381 | group->cg_subsys, | |
1382 | &opts->func_inst.group.cg_item); | |
1383 | if (ret) | |
1384 | goto unlock_dep; | |
1385 | } | |
08a1cb0f AP |
1386 | |
1387 | tpg = kzalloc(sizeof(struct usbg_tpg), GFP_KERNEL); | |
dc8c46a5 | 1388 | ret = -ENOMEM; |
08a1cb0f | 1389 | if (!tpg) |
dc8c46a5 | 1390 | goto unref_dep; |
08a1cb0f AP |
1391 | mutex_init(&tpg->tpg_mutex); |
1392 | atomic_set(&tpg->tpg_port_count, 0); | |
1393 | tpg->workqueue = alloc_workqueue("tcm_usb_gadget", 0, 1); | |
e5587ea1 | 1394 | if (!tpg->workqueue) |
dc8c46a5 | 1395 | goto free_tpg; |
08a1cb0f AP |
1396 | |
1397 | tpg->tport = tport; | |
1398 | tpg->tport_tpgt = tpgt; | |
1399 | ||
1400 | /* | |
1401 | * SPC doesn't assign a protocol identifier for USB-SCSI, so we | |
1402 | * pretend to be SAS.. | |
1403 | */ | |
1404 | ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_SAS); | |
e5587ea1 | 1405 | if (ret < 0) |
dc8c46a5 | 1406 | goto free_workqueue; |
e5587ea1 | 1407 | |
dc8c46a5 AP |
1408 | tpg_instances[i].tpg = tpg; |
1409 | tpg->fi = tpg_instances[i].func_inst; | |
1410 | mutex_unlock(&opts->dep_lock); | |
1411 | mutex_unlock(&tpg_instances_lock); | |
08a1cb0f | 1412 | return &tpg->se_tpg; |
e5587ea1 | 1413 | |
dc8c46a5 AP |
1414 | free_workqueue: |
1415 | destroy_workqueue(tpg->workqueue); | |
1416 | free_tpg: | |
1417 | kfree(tpg); | |
1418 | unref_dep: | |
4bb8548d AP |
1419 | if (opts->has_dep) |
1420 | module_put(opts->dependent); | |
1421 | else | |
1422 | configfs_undepend_item_unlocked(&opts->func_inst.group.cg_item); | |
dc8c46a5 AP |
1423 | unlock_dep: |
1424 | mutex_unlock(&opts->dep_lock); | |
1425 | unlock_inst: | |
1426 | mutex_unlock(&tpg_instances_lock); | |
1427 | ||
1428 | return ERR_PTR(ret); | |
08a1cb0f AP |
1429 | } |
1430 | ||
1431 | static int tcm_usbg_drop_nexus(struct usbg_tpg *); | |
1432 | ||
1433 | static void usbg_drop_tpg(struct se_portal_group *se_tpg) | |
1434 | { | |
1435 | struct usbg_tpg *tpg = container_of(se_tpg, | |
1436 | struct usbg_tpg, se_tpg); | |
dc8c46a5 AP |
1437 | unsigned i; |
1438 | struct f_tcm_opts *opts; | |
08a1cb0f AP |
1439 | |
1440 | tcm_usbg_drop_nexus(tpg); | |
1441 | core_tpg_deregister(se_tpg); | |
1442 | destroy_workqueue(tpg->workqueue); | |
dc8c46a5 | 1443 | |
dc8c46a5 AP |
1444 | mutex_lock(&tpg_instances_lock); |
1445 | for (i = 0; i < TPG_INSTANCES; ++i) | |
1446 | if (tpg_instances[i].tpg == tpg) | |
1447 | break; | |
e877b729 | 1448 | if (i < TPG_INSTANCES) { |
dc8c46a5 | 1449 | tpg_instances[i].tpg = NULL; |
e877b729 HS |
1450 | opts = container_of(tpg_instances[i].func_inst, |
1451 | struct f_tcm_opts, func_inst); | |
1452 | mutex_lock(&opts->dep_lock); | |
1453 | if (opts->has_dep) | |
1454 | module_put(opts->dependent); | |
1455 | else | |
1456 | configfs_undepend_item_unlocked( | |
1457 | &opts->func_inst.group.cg_item); | |
1458 | mutex_unlock(&opts->dep_lock); | |
1459 | } | |
dc8c46a5 | 1460 | mutex_unlock(&tpg_instances_lock); |
e5587ea1 | 1461 | |
08a1cb0f | 1462 | kfree(tpg); |
08a1cb0f AP |
1463 | } |
1464 | ||
1465 | static struct se_wwn *usbg_make_tport( | |
1466 | struct target_fabric_configfs *tf, | |
1467 | struct config_group *group, | |
1468 | const char *name) | |
1469 | { | |
1470 | struct usbg_tport *tport; | |
1471 | const char *wnn_name; | |
1472 | u64 wwpn = 0; | |
1473 | ||
1474 | wnn_name = usbg_check_wwn(name); | |
1475 | if (!wnn_name) | |
1476 | return ERR_PTR(-EINVAL); | |
1477 | ||
1478 | tport = kzalloc(sizeof(struct usbg_tport), GFP_KERNEL); | |
1479 | if (!(tport)) | |
1480 | return ERR_PTR(-ENOMEM); | |
dc8c46a5 | 1481 | |
08a1cb0f AP |
1482 | tport->tport_wwpn = wwpn; |
1483 | snprintf(tport->tport_name, sizeof(tport->tport_name), "%s", wnn_name); | |
1484 | return &tport->tport_wwn; | |
1485 | } | |
1486 | ||
1487 | static void usbg_drop_tport(struct se_wwn *wwn) | |
1488 | { | |
1489 | struct usbg_tport *tport = container_of(wwn, | |
1490 | struct usbg_tport, tport_wwn); | |
1491 | kfree(tport); | |
1492 | } | |
1493 | ||
1494 | /* | |
1495 | * If somebody feels like dropping the version property, go ahead. | |
1496 | */ | |
1497 | static ssize_t usbg_wwn_version_show(struct config_item *item, char *page) | |
1498 | { | |
1499 | return sprintf(page, "usb-gadget fabric module\n"); | |
1500 | } | |
1501 | ||
1502 | CONFIGFS_ATTR_RO(usbg_wwn_, version); | |
1503 | ||
1504 | static struct configfs_attribute *usbg_wwn_attrs[] = { | |
1505 | &usbg_wwn_attr_version, | |
1506 | NULL, | |
1507 | }; | |
1508 | ||
1509 | static ssize_t tcm_usbg_tpg_enable_show(struct config_item *item, char *page) | |
1510 | { | |
1511 | struct se_portal_group *se_tpg = to_tpg(item); | |
1512 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1513 | ||
1514 | return snprintf(page, PAGE_SIZE, "%u\n", tpg->gadget_connect); | |
1515 | } | |
1516 | ||
1517 | static int usbg_attach(struct usbg_tpg *); | |
1518 | static void usbg_detach(struct usbg_tpg *); | |
1519 | ||
1520 | static ssize_t tcm_usbg_tpg_enable_store(struct config_item *item, | |
1521 | const char *page, size_t count) | |
1522 | { | |
1523 | struct se_portal_group *se_tpg = to_tpg(item); | |
1524 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1525 | bool op; | |
1526 | ssize_t ret; | |
1527 | ||
1528 | ret = strtobool(page, &op); | |
1529 | if (ret) | |
1530 | return ret; | |
1531 | ||
1532 | if ((op && tpg->gadget_connect) || (!op && !tpg->gadget_connect)) | |
1533 | return -EINVAL; | |
1534 | ||
1535 | if (op) | |
1536 | ret = usbg_attach(tpg); | |
1537 | else | |
1538 | usbg_detach(tpg); | |
1539 | if (ret) | |
1540 | return ret; | |
1541 | ||
1542 | tpg->gadget_connect = op; | |
1543 | ||
1544 | return count; | |
1545 | } | |
1546 | ||
1547 | static ssize_t tcm_usbg_tpg_nexus_show(struct config_item *item, char *page) | |
1548 | { | |
1549 | struct se_portal_group *se_tpg = to_tpg(item); | |
1550 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1551 | struct tcm_usbg_nexus *tv_nexus; | |
1552 | ssize_t ret; | |
1553 | ||
1554 | mutex_lock(&tpg->tpg_mutex); | |
1555 | tv_nexus = tpg->tpg_nexus; | |
1556 | if (!tv_nexus) { | |
1557 | ret = -ENODEV; | |
1558 | goto out; | |
1559 | } | |
1560 | ret = snprintf(page, PAGE_SIZE, "%s\n", | |
1561 | tv_nexus->tvn_se_sess->se_node_acl->initiatorname); | |
1562 | out: | |
1563 | mutex_unlock(&tpg->tpg_mutex); | |
1564 | return ret; | |
1565 | } | |
1566 | ||
fb444abe CH |
1567 | static int usbg_alloc_sess_cb(struct se_portal_group *se_tpg, |
1568 | struct se_session *se_sess, void *p) | |
1569 | { | |
1570 | struct usbg_tpg *tpg = container_of(se_tpg, | |
1571 | struct usbg_tpg, se_tpg); | |
1572 | ||
1573 | tpg->tpg_nexus = p; | |
1574 | return 0; | |
1575 | } | |
1576 | ||
08a1cb0f AP |
1577 | static int tcm_usbg_make_nexus(struct usbg_tpg *tpg, char *name) |
1578 | { | |
08a1cb0f | 1579 | struct tcm_usbg_nexus *tv_nexus; |
fb444abe | 1580 | int ret = 0; |
08a1cb0f AP |
1581 | |
1582 | mutex_lock(&tpg->tpg_mutex); | |
1583 | if (tpg->tpg_nexus) { | |
1584 | ret = -EEXIST; | |
1585 | pr_debug("tpg->tpg_nexus already exists\n"); | |
fb444abe | 1586 | goto out_unlock; |
08a1cb0f | 1587 | } |
08a1cb0f | 1588 | |
08a1cb0f | 1589 | tv_nexus = kzalloc(sizeof(*tv_nexus), GFP_KERNEL); |
fb444abe CH |
1590 | if (!tv_nexus) { |
1591 | ret = -ENOMEM; | |
1592 | goto out_unlock; | |
1593 | } | |
08a1cb0f | 1594 | |
71e7ae8e NB |
1595 | tv_nexus->tvn_se_sess = target_alloc_session(&tpg->se_tpg, |
1596 | USB_G_DEFAULT_SESSION_TAGS, | |
1597 | sizeof(struct usbg_cmd), | |
fb444abe CH |
1598 | TARGET_PROT_NORMAL, name, |
1599 | tv_nexus, usbg_alloc_sess_cb); | |
1600 | if (IS_ERR(tv_nexus->tvn_se_sess)) { | |
08a1cb0f AP |
1601 | #define MAKE_NEXUS_MSG "core_tpg_check_initiator_node_acl() failed for %s\n" |
1602 | pr_debug(MAKE_NEXUS_MSG, name); | |
1603 | #undef MAKE_NEXUS_MSG | |
fb444abe CH |
1604 | ret = PTR_ERR(tv_nexus->tvn_se_sess); |
1605 | kfree(tv_nexus); | |
08a1cb0f | 1606 | } |
08a1cb0f | 1607 | |
fb444abe | 1608 | out_unlock: |
08a1cb0f AP |
1609 | mutex_unlock(&tpg->tpg_mutex); |
1610 | return ret; | |
1611 | } | |
1612 | ||
1613 | static int tcm_usbg_drop_nexus(struct usbg_tpg *tpg) | |
1614 | { | |
1615 | struct se_session *se_sess; | |
1616 | struct tcm_usbg_nexus *tv_nexus; | |
1617 | int ret = -ENODEV; | |
1618 | ||
1619 | mutex_lock(&tpg->tpg_mutex); | |
1620 | tv_nexus = tpg->tpg_nexus; | |
1621 | if (!tv_nexus) | |
1622 | goto out; | |
1623 | ||
1624 | se_sess = tv_nexus->tvn_se_sess; | |
1625 | if (!se_sess) | |
1626 | goto out; | |
1627 | ||
1628 | if (atomic_read(&tpg->tpg_port_count)) { | |
1629 | ret = -EPERM; | |
1630 | #define MSG "Unable to remove Host I_T Nexus with active TPG port count: %d\n" | |
1631 | pr_err(MSG, atomic_read(&tpg->tpg_port_count)); | |
1632 | #undef MSG | |
1633 | goto out; | |
1634 | } | |
1635 | ||
1636 | pr_debug("Removing I_T Nexus to Initiator Port: %s\n", | |
1637 | tv_nexus->tvn_se_sess->se_node_acl->initiatorname); | |
1638 | /* | |
1639 | * Release the SCSI I_T Nexus to the emulated vHost Target Port | |
1640 | */ | |
1641 | transport_deregister_session(tv_nexus->tvn_se_sess); | |
1642 | tpg->tpg_nexus = NULL; | |
1643 | ||
1644 | kfree(tv_nexus); | |
1645 | ret = 0; | |
1646 | out: | |
1647 | mutex_unlock(&tpg->tpg_mutex); | |
1648 | return ret; | |
1649 | } | |
1650 | ||
1651 | static ssize_t tcm_usbg_tpg_nexus_store(struct config_item *item, | |
1652 | const char *page, size_t count) | |
1653 | { | |
1654 | struct se_portal_group *se_tpg = to_tpg(item); | |
1655 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1656 | unsigned char i_port[USBG_NAMELEN], *ptr; | |
1657 | int ret; | |
1658 | ||
1659 | if (!strncmp(page, "NULL", 4)) { | |
1660 | ret = tcm_usbg_drop_nexus(tpg); | |
1661 | return (!ret) ? count : ret; | |
1662 | } | |
1663 | if (strlen(page) >= USBG_NAMELEN) { | |
1664 | ||
1665 | #define NEXUS_STORE_MSG "Emulated NAA Sas Address: %s, exceeds max: %d\n" | |
1666 | pr_err(NEXUS_STORE_MSG, page, USBG_NAMELEN); | |
1667 | #undef NEXUS_STORE_MSG | |
1668 | return -EINVAL; | |
1669 | } | |
1670 | snprintf(i_port, USBG_NAMELEN, "%s", page); | |
1671 | ||
1672 | ptr = strstr(i_port, "naa."); | |
1673 | if (!ptr) { | |
1674 | pr_err("Missing 'naa.' prefix\n"); | |
1675 | return -EINVAL; | |
1676 | } | |
1677 | ||
1678 | if (i_port[strlen(i_port) - 1] == '\n') | |
1679 | i_port[strlen(i_port) - 1] = '\0'; | |
1680 | ||
1681 | ret = tcm_usbg_make_nexus(tpg, &i_port[0]); | |
1682 | if (ret < 0) | |
1683 | return ret; | |
1684 | return count; | |
1685 | } | |
1686 | ||
1687 | CONFIGFS_ATTR(tcm_usbg_tpg_, enable); | |
1688 | CONFIGFS_ATTR(tcm_usbg_tpg_, nexus); | |
1689 | ||
1690 | static struct configfs_attribute *usbg_base_attrs[] = { | |
1691 | &tcm_usbg_tpg_attr_enable, | |
1692 | &tcm_usbg_tpg_attr_nexus, | |
1693 | NULL, | |
1694 | }; | |
1695 | ||
1696 | static int usbg_port_link(struct se_portal_group *se_tpg, struct se_lun *lun) | |
1697 | { | |
1698 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1699 | ||
1700 | atomic_inc(&tpg->tpg_port_count); | |
1701 | smp_mb__after_atomic(); | |
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | static void usbg_port_unlink(struct se_portal_group *se_tpg, | |
1706 | struct se_lun *se_lun) | |
1707 | { | |
1708 | struct usbg_tpg *tpg = container_of(se_tpg, struct usbg_tpg, se_tpg); | |
1709 | ||
1710 | atomic_dec(&tpg->tpg_port_count); | |
1711 | smp_mb__after_atomic(); | |
1712 | } | |
1713 | ||
1714 | static int usbg_check_stop_free(struct se_cmd *se_cmd) | |
1715 | { | |
cff834c1 | 1716 | return target_put_sess_cmd(se_cmd); |
08a1cb0f AP |
1717 | } |
1718 | ||
1719 | static const struct target_core_fabric_ops usbg_ops = { | |
1720 | .module = THIS_MODULE, | |
1721 | .name = "usb_gadget", | |
1722 | .get_fabric_name = usbg_get_fabric_name, | |
1723 | .tpg_get_wwn = usbg_get_fabric_wwn, | |
1724 | .tpg_get_tag = usbg_get_tag, | |
1725 | .tpg_check_demo_mode = usbg_check_true, | |
1726 | .tpg_check_demo_mode_cache = usbg_check_false, | |
1727 | .tpg_check_demo_mode_write_protect = usbg_check_false, | |
1728 | .tpg_check_prod_mode_write_protect = usbg_check_false, | |
1729 | .tpg_get_inst_index = usbg_tpg_get_inst_index, | |
1730 | .release_cmd = usbg_release_cmd, | |
08a1cb0f AP |
1731 | .sess_get_index = usbg_sess_get_index, |
1732 | .sess_get_initiator_sid = NULL, | |
1733 | .write_pending = usbg_send_write_request, | |
1734 | .write_pending_status = usbg_write_pending_status, | |
1735 | .set_default_node_attributes = usbg_set_default_node_attrs, | |
1736 | .get_cmd_state = usbg_get_cmd_state, | |
1737 | .queue_data_in = usbg_send_read_response, | |
1738 | .queue_status = usbg_send_status_response, | |
1739 | .queue_tm_rsp = usbg_queue_tm_rsp, | |
1740 | .aborted_task = usbg_aborted_task, | |
1741 | .check_stop_free = usbg_check_stop_free, | |
1742 | ||
1743 | .fabric_make_wwn = usbg_make_tport, | |
1744 | .fabric_drop_wwn = usbg_drop_tport, | |
1745 | .fabric_make_tpg = usbg_make_tpg, | |
1746 | .fabric_drop_tpg = usbg_drop_tpg, | |
1747 | .fabric_post_link = usbg_port_link, | |
1748 | .fabric_pre_unlink = usbg_port_unlink, | |
1749 | .fabric_init_nodeacl = usbg_init_nodeacl, | |
1750 | ||
1751 | .tfc_wwn_attrs = usbg_wwn_attrs, | |
1752 | .tfc_tpg_base_attrs = usbg_base_attrs, | |
1753 | }; | |
1754 | ||
1755 | /* Start gadget.c code */ | |
1756 | ||
1757 | static struct usb_interface_descriptor bot_intf_desc = { | |
1758 | .bLength = sizeof(bot_intf_desc), | |
1759 | .bDescriptorType = USB_DT_INTERFACE, | |
1760 | .bNumEndpoints = 2, | |
1761 | .bAlternateSetting = USB_G_ALT_INT_BBB, | |
1762 | .bInterfaceClass = USB_CLASS_MASS_STORAGE, | |
1763 | .bInterfaceSubClass = USB_SC_SCSI, | |
1764 | .bInterfaceProtocol = USB_PR_BULK, | |
1765 | }; | |
1766 | ||
1767 | static struct usb_interface_descriptor uasp_intf_desc = { | |
1768 | .bLength = sizeof(uasp_intf_desc), | |
1769 | .bDescriptorType = USB_DT_INTERFACE, | |
1770 | .bNumEndpoints = 4, | |
1771 | .bAlternateSetting = USB_G_ALT_INT_UAS, | |
1772 | .bInterfaceClass = USB_CLASS_MASS_STORAGE, | |
1773 | .bInterfaceSubClass = USB_SC_SCSI, | |
1774 | .bInterfaceProtocol = USB_PR_UAS, | |
1775 | }; | |
1776 | ||
1777 | static struct usb_endpoint_descriptor uasp_bi_desc = { | |
1778 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1779 | .bDescriptorType = USB_DT_ENDPOINT, | |
1780 | .bEndpointAddress = USB_DIR_IN, | |
1781 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1782 | .wMaxPacketSize = cpu_to_le16(512), | |
1783 | }; | |
1784 | ||
1785 | static struct usb_endpoint_descriptor uasp_fs_bi_desc = { | |
1786 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1787 | .bDescriptorType = USB_DT_ENDPOINT, | |
1788 | .bEndpointAddress = USB_DIR_IN, | |
1789 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1790 | }; | |
1791 | ||
1792 | static struct usb_pipe_usage_descriptor uasp_bi_pipe_desc = { | |
1793 | .bLength = sizeof(uasp_bi_pipe_desc), | |
1794 | .bDescriptorType = USB_DT_PIPE_USAGE, | |
1795 | .bPipeID = DATA_IN_PIPE_ID, | |
1796 | }; | |
1797 | ||
1798 | static struct usb_endpoint_descriptor uasp_ss_bi_desc = { | |
1799 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1800 | .bDescriptorType = USB_DT_ENDPOINT, | |
1801 | .bEndpointAddress = USB_DIR_IN, | |
1802 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1803 | .wMaxPacketSize = cpu_to_le16(1024), | |
1804 | }; | |
1805 | ||
1806 | static struct usb_ss_ep_comp_descriptor uasp_bi_ep_comp_desc = { | |
1807 | .bLength = sizeof(uasp_bi_ep_comp_desc), | |
1808 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1809 | .bMaxBurst = 0, | |
1810 | .bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS, | |
1811 | .wBytesPerInterval = 0, | |
1812 | }; | |
1813 | ||
1814 | static struct usb_ss_ep_comp_descriptor bot_bi_ep_comp_desc = { | |
1815 | .bLength = sizeof(bot_bi_ep_comp_desc), | |
1816 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1817 | .bMaxBurst = 0, | |
1818 | }; | |
1819 | ||
1820 | static struct usb_endpoint_descriptor uasp_bo_desc = { | |
1821 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1822 | .bDescriptorType = USB_DT_ENDPOINT, | |
1823 | .bEndpointAddress = USB_DIR_OUT, | |
1824 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1825 | .wMaxPacketSize = cpu_to_le16(512), | |
1826 | }; | |
1827 | ||
1828 | static struct usb_endpoint_descriptor uasp_fs_bo_desc = { | |
1829 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1830 | .bDescriptorType = USB_DT_ENDPOINT, | |
1831 | .bEndpointAddress = USB_DIR_OUT, | |
1832 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1833 | }; | |
1834 | ||
1835 | static struct usb_pipe_usage_descriptor uasp_bo_pipe_desc = { | |
1836 | .bLength = sizeof(uasp_bo_pipe_desc), | |
1837 | .bDescriptorType = USB_DT_PIPE_USAGE, | |
1838 | .bPipeID = DATA_OUT_PIPE_ID, | |
1839 | }; | |
1840 | ||
1841 | static struct usb_endpoint_descriptor uasp_ss_bo_desc = { | |
1842 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1843 | .bDescriptorType = USB_DT_ENDPOINT, | |
1844 | .bEndpointAddress = USB_DIR_OUT, | |
1845 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1846 | .wMaxPacketSize = cpu_to_le16(0x400), | |
1847 | }; | |
1848 | ||
1849 | static struct usb_ss_ep_comp_descriptor uasp_bo_ep_comp_desc = { | |
1850 | .bLength = sizeof(uasp_bo_ep_comp_desc), | |
1851 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1852 | .bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS, | |
1853 | }; | |
1854 | ||
1855 | static struct usb_ss_ep_comp_descriptor bot_bo_ep_comp_desc = { | |
1856 | .bLength = sizeof(bot_bo_ep_comp_desc), | |
1857 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1858 | }; | |
1859 | ||
1860 | static struct usb_endpoint_descriptor uasp_status_desc = { | |
1861 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1862 | .bDescriptorType = USB_DT_ENDPOINT, | |
1863 | .bEndpointAddress = USB_DIR_IN, | |
1864 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1865 | .wMaxPacketSize = cpu_to_le16(512), | |
1866 | }; | |
1867 | ||
1868 | static struct usb_endpoint_descriptor uasp_fs_status_desc = { | |
1869 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1870 | .bDescriptorType = USB_DT_ENDPOINT, | |
1871 | .bEndpointAddress = USB_DIR_IN, | |
1872 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1873 | }; | |
1874 | ||
1875 | static struct usb_pipe_usage_descriptor uasp_status_pipe_desc = { | |
1876 | .bLength = sizeof(uasp_status_pipe_desc), | |
1877 | .bDescriptorType = USB_DT_PIPE_USAGE, | |
1878 | .bPipeID = STATUS_PIPE_ID, | |
1879 | }; | |
1880 | ||
1881 | static struct usb_endpoint_descriptor uasp_ss_status_desc = { | |
1882 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1883 | .bDescriptorType = USB_DT_ENDPOINT, | |
1884 | .bEndpointAddress = USB_DIR_IN, | |
1885 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1886 | .wMaxPacketSize = cpu_to_le16(1024), | |
1887 | }; | |
1888 | ||
1889 | static struct usb_ss_ep_comp_descriptor uasp_status_in_ep_comp_desc = { | |
1890 | .bLength = sizeof(uasp_status_in_ep_comp_desc), | |
1891 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1892 | .bmAttributes = UASP_SS_EP_COMP_LOG_STREAMS, | |
1893 | }; | |
1894 | ||
1895 | static struct usb_endpoint_descriptor uasp_cmd_desc = { | |
1896 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1897 | .bDescriptorType = USB_DT_ENDPOINT, | |
1898 | .bEndpointAddress = USB_DIR_OUT, | |
1899 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1900 | .wMaxPacketSize = cpu_to_le16(512), | |
1901 | }; | |
1902 | ||
1903 | static struct usb_endpoint_descriptor uasp_fs_cmd_desc = { | |
1904 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1905 | .bDescriptorType = USB_DT_ENDPOINT, | |
1906 | .bEndpointAddress = USB_DIR_OUT, | |
1907 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1908 | }; | |
1909 | ||
1910 | static struct usb_pipe_usage_descriptor uasp_cmd_pipe_desc = { | |
1911 | .bLength = sizeof(uasp_cmd_pipe_desc), | |
1912 | .bDescriptorType = USB_DT_PIPE_USAGE, | |
1913 | .bPipeID = CMD_PIPE_ID, | |
1914 | }; | |
1915 | ||
1916 | static struct usb_endpoint_descriptor uasp_ss_cmd_desc = { | |
1917 | .bLength = USB_DT_ENDPOINT_SIZE, | |
1918 | .bDescriptorType = USB_DT_ENDPOINT, | |
1919 | .bEndpointAddress = USB_DIR_OUT, | |
1920 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
1921 | .wMaxPacketSize = cpu_to_le16(1024), | |
1922 | }; | |
1923 | ||
1924 | static struct usb_ss_ep_comp_descriptor uasp_cmd_comp_desc = { | |
1925 | .bLength = sizeof(uasp_cmd_comp_desc), | |
1926 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
1927 | }; | |
1928 | ||
1929 | static struct usb_descriptor_header *uasp_fs_function_desc[] = { | |
1930 | (struct usb_descriptor_header *) &bot_intf_desc, | |
1931 | (struct usb_descriptor_header *) &uasp_fs_bi_desc, | |
1932 | (struct usb_descriptor_header *) &uasp_fs_bo_desc, | |
1933 | ||
1934 | (struct usb_descriptor_header *) &uasp_intf_desc, | |
1935 | (struct usb_descriptor_header *) &uasp_fs_bi_desc, | |
1936 | (struct usb_descriptor_header *) &uasp_bi_pipe_desc, | |
1937 | (struct usb_descriptor_header *) &uasp_fs_bo_desc, | |
1938 | (struct usb_descriptor_header *) &uasp_bo_pipe_desc, | |
1939 | (struct usb_descriptor_header *) &uasp_fs_status_desc, | |
1940 | (struct usb_descriptor_header *) &uasp_status_pipe_desc, | |
1941 | (struct usb_descriptor_header *) &uasp_fs_cmd_desc, | |
1942 | (struct usb_descriptor_header *) &uasp_cmd_pipe_desc, | |
1943 | NULL, | |
1944 | }; | |
1945 | ||
1946 | static struct usb_descriptor_header *uasp_hs_function_desc[] = { | |
1947 | (struct usb_descriptor_header *) &bot_intf_desc, | |
1948 | (struct usb_descriptor_header *) &uasp_bi_desc, | |
1949 | (struct usb_descriptor_header *) &uasp_bo_desc, | |
1950 | ||
1951 | (struct usb_descriptor_header *) &uasp_intf_desc, | |
1952 | (struct usb_descriptor_header *) &uasp_bi_desc, | |
1953 | (struct usb_descriptor_header *) &uasp_bi_pipe_desc, | |
1954 | (struct usb_descriptor_header *) &uasp_bo_desc, | |
1955 | (struct usb_descriptor_header *) &uasp_bo_pipe_desc, | |
1956 | (struct usb_descriptor_header *) &uasp_status_desc, | |
1957 | (struct usb_descriptor_header *) &uasp_status_pipe_desc, | |
1958 | (struct usb_descriptor_header *) &uasp_cmd_desc, | |
1959 | (struct usb_descriptor_header *) &uasp_cmd_pipe_desc, | |
1960 | NULL, | |
1961 | }; | |
1962 | ||
1963 | static struct usb_descriptor_header *uasp_ss_function_desc[] = { | |
1964 | (struct usb_descriptor_header *) &bot_intf_desc, | |
1965 | (struct usb_descriptor_header *) &uasp_ss_bi_desc, | |
1966 | (struct usb_descriptor_header *) &bot_bi_ep_comp_desc, | |
1967 | (struct usb_descriptor_header *) &uasp_ss_bo_desc, | |
1968 | (struct usb_descriptor_header *) &bot_bo_ep_comp_desc, | |
1969 | ||
1970 | (struct usb_descriptor_header *) &uasp_intf_desc, | |
1971 | (struct usb_descriptor_header *) &uasp_ss_bi_desc, | |
1972 | (struct usb_descriptor_header *) &uasp_bi_ep_comp_desc, | |
1973 | (struct usb_descriptor_header *) &uasp_bi_pipe_desc, | |
1974 | (struct usb_descriptor_header *) &uasp_ss_bo_desc, | |
1975 | (struct usb_descriptor_header *) &uasp_bo_ep_comp_desc, | |
1976 | (struct usb_descriptor_header *) &uasp_bo_pipe_desc, | |
1977 | (struct usb_descriptor_header *) &uasp_ss_status_desc, | |
1978 | (struct usb_descriptor_header *) &uasp_status_in_ep_comp_desc, | |
1979 | (struct usb_descriptor_header *) &uasp_status_pipe_desc, | |
1980 | (struct usb_descriptor_header *) &uasp_ss_cmd_desc, | |
1981 | (struct usb_descriptor_header *) &uasp_cmd_comp_desc, | |
1982 | (struct usb_descriptor_header *) &uasp_cmd_pipe_desc, | |
1983 | NULL, | |
1984 | }; | |
1985 | ||
1986 | static struct usb_string tcm_us_strings[] = { | |
1987 | [USB_G_STR_INT_UAS].s = "USB Attached SCSI", | |
1988 | [USB_G_STR_INT_BBB].s = "Bulk Only Transport", | |
1989 | { }, | |
1990 | }; | |
1991 | ||
1992 | static struct usb_gadget_strings tcm_stringtab = { | |
1993 | .language = 0x0409, | |
1994 | .strings = tcm_us_strings, | |
1995 | }; | |
1996 | ||
1997 | static struct usb_gadget_strings *tcm_strings[] = { | |
1998 | &tcm_stringtab, | |
1999 | NULL, | |
2000 | }; | |
2001 | ||
2002 | static int tcm_bind(struct usb_configuration *c, struct usb_function *f) | |
2003 | { | |
2004 | struct f_uas *fu = to_f_uas(f); | |
9beab5d4 | 2005 | struct usb_string *us; |
08a1cb0f AP |
2006 | struct usb_gadget *gadget = c->cdev->gadget; |
2007 | struct usb_ep *ep; | |
dc8c46a5 | 2008 | struct f_tcm_opts *opts; |
08a1cb0f AP |
2009 | int iface; |
2010 | int ret; | |
2011 | ||
dc8c46a5 AP |
2012 | opts = container_of(f->fi, struct f_tcm_opts, func_inst); |
2013 | ||
2014 | mutex_lock(&opts->dep_lock); | |
2015 | if (!opts->can_attach) { | |
2016 | mutex_unlock(&opts->dep_lock); | |
2017 | return -ENODEV; | |
2018 | } | |
2019 | mutex_unlock(&opts->dep_lock); | |
9beab5d4 AP |
2020 | us = usb_gstrings_attach(c->cdev, tcm_strings, |
2021 | ARRAY_SIZE(tcm_us_strings)); | |
2022 | if (IS_ERR(us)) | |
2023 | return PTR_ERR(us); | |
2024 | bot_intf_desc.iInterface = us[USB_G_STR_INT_BBB].id; | |
2025 | uasp_intf_desc.iInterface = us[USB_G_STR_INT_UAS].id; | |
dc8c46a5 | 2026 | |
08a1cb0f AP |
2027 | iface = usb_interface_id(c, f); |
2028 | if (iface < 0) | |
2029 | return iface; | |
2030 | ||
2031 | bot_intf_desc.bInterfaceNumber = iface; | |
2032 | uasp_intf_desc.bInterfaceNumber = iface; | |
2033 | fu->iface = iface; | |
2034 | ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_bi_desc, | |
2035 | &uasp_bi_ep_comp_desc); | |
2036 | if (!ep) | |
2037 | goto ep_fail; | |
2038 | ||
2039 | fu->ep_in = ep; | |
2040 | ||
2041 | ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_bo_desc, | |
2042 | &uasp_bo_ep_comp_desc); | |
2043 | if (!ep) | |
2044 | goto ep_fail; | |
2045 | fu->ep_out = ep; | |
2046 | ||
2047 | ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_status_desc, | |
2048 | &uasp_status_in_ep_comp_desc); | |
2049 | if (!ep) | |
2050 | goto ep_fail; | |
2051 | fu->ep_status = ep; | |
2052 | ||
2053 | ep = usb_ep_autoconfig_ss(gadget, &uasp_ss_cmd_desc, | |
2054 | &uasp_cmd_comp_desc); | |
2055 | if (!ep) | |
2056 | goto ep_fail; | |
2057 | fu->ep_cmd = ep; | |
2058 | ||
2059 | /* Assume endpoint addresses are the same for both speeds */ | |
2060 | uasp_bi_desc.bEndpointAddress = uasp_ss_bi_desc.bEndpointAddress; | |
2061 | uasp_bo_desc.bEndpointAddress = uasp_ss_bo_desc.bEndpointAddress; | |
2062 | uasp_status_desc.bEndpointAddress = | |
2063 | uasp_ss_status_desc.bEndpointAddress; | |
2064 | uasp_cmd_desc.bEndpointAddress = uasp_ss_cmd_desc.bEndpointAddress; | |
2065 | ||
2066 | uasp_fs_bi_desc.bEndpointAddress = uasp_ss_bi_desc.bEndpointAddress; | |
2067 | uasp_fs_bo_desc.bEndpointAddress = uasp_ss_bo_desc.bEndpointAddress; | |
2068 | uasp_fs_status_desc.bEndpointAddress = | |
2069 | uasp_ss_status_desc.bEndpointAddress; | |
2070 | uasp_fs_cmd_desc.bEndpointAddress = uasp_ss_cmd_desc.bEndpointAddress; | |
2071 | ||
2072 | ret = usb_assign_descriptors(f, uasp_fs_function_desc, | |
eaef50c7 | 2073 | uasp_hs_function_desc, uasp_ss_function_desc, NULL); |
08a1cb0f AP |
2074 | if (ret) |
2075 | goto ep_fail; | |
2076 | ||
2077 | return 0; | |
2078 | ep_fail: | |
2079 | pr_err("Can't claim all required eps\n"); | |
2080 | ||
2081 | return -ENOTSUPP; | |
2082 | } | |
2083 | ||
08a1cb0f AP |
2084 | struct guas_setup_wq { |
2085 | struct work_struct work; | |
2086 | struct f_uas *fu; | |
2087 | unsigned int alt; | |
2088 | }; | |
2089 | ||
2090 | static void tcm_delayed_set_alt(struct work_struct *wq) | |
2091 | { | |
2092 | struct guas_setup_wq *work = container_of(wq, struct guas_setup_wq, | |
2093 | work); | |
2094 | struct f_uas *fu = work->fu; | |
2095 | int alt = work->alt; | |
2096 | ||
2097 | kfree(work); | |
2098 | ||
2099 | if (fu->flags & USBG_IS_BOT) | |
2100 | bot_cleanup_old_alt(fu); | |
2101 | if (fu->flags & USBG_IS_UAS) | |
2102 | uasp_cleanup_old_alt(fu); | |
2103 | ||
2104 | if (alt == USB_G_ALT_INT_BBB) | |
2105 | bot_set_alt(fu); | |
2106 | else if (alt == USB_G_ALT_INT_UAS) | |
2107 | uasp_set_alt(fu); | |
2108 | usb_composite_setup_continue(fu->function.config->cdev); | |
2109 | } | |
2110 | ||
2111 | static int tcm_set_alt(struct usb_function *f, unsigned intf, unsigned alt) | |
2112 | { | |
2113 | struct f_uas *fu = to_f_uas(f); | |
2114 | ||
2115 | if ((alt == USB_G_ALT_INT_BBB) || (alt == USB_G_ALT_INT_UAS)) { | |
2116 | struct guas_setup_wq *work; | |
2117 | ||
2118 | work = kmalloc(sizeof(*work), GFP_ATOMIC); | |
2119 | if (!work) | |
2120 | return -ENOMEM; | |
2121 | INIT_WORK(&work->work, tcm_delayed_set_alt); | |
2122 | work->fu = fu; | |
2123 | work->alt = alt; | |
2124 | schedule_work(&work->work); | |
2125 | return USB_GADGET_DELAYED_STATUS; | |
2126 | } | |
2127 | return -EOPNOTSUPP; | |
2128 | } | |
2129 | ||
2130 | static void tcm_disable(struct usb_function *f) | |
2131 | { | |
2132 | struct f_uas *fu = to_f_uas(f); | |
2133 | ||
2134 | if (fu->flags & USBG_IS_UAS) | |
2135 | uasp_cleanup_old_alt(fu); | |
2136 | else if (fu->flags & USBG_IS_BOT) | |
2137 | bot_cleanup_old_alt(fu); | |
2138 | fu->flags = 0; | |
2139 | } | |
2140 | ||
2141 | static int tcm_setup(struct usb_function *f, | |
2142 | const struct usb_ctrlrequest *ctrl) | |
2143 | { | |
2144 | struct f_uas *fu = to_f_uas(f); | |
2145 | ||
2146 | if (!(fu->flags & USBG_IS_BOT)) | |
2147 | return -EOPNOTSUPP; | |
2148 | ||
2149 | return usbg_bot_setup(f, ctrl); | |
2150 | } | |
2151 | ||
4bb8548d AP |
2152 | static inline struct f_tcm_opts *to_f_tcm_opts(struct config_item *item) |
2153 | { | |
2154 | return container_of(to_config_group(item), struct f_tcm_opts, | |
2155 | func_inst.group); | |
2156 | } | |
2157 | ||
2158 | static void tcm_attr_release(struct config_item *item) | |
2159 | { | |
2160 | struct f_tcm_opts *opts = to_f_tcm_opts(item); | |
2161 | ||
2162 | usb_put_function_instance(&opts->func_inst); | |
2163 | } | |
2164 | ||
2165 | static struct configfs_item_operations tcm_item_ops = { | |
2166 | .release = tcm_attr_release, | |
2167 | }; | |
2168 | ||
2169 | static struct config_item_type tcm_func_type = { | |
2170 | .ct_item_ops = &tcm_item_ops, | |
2171 | .ct_owner = THIS_MODULE, | |
2172 | }; | |
2173 | ||
dc8c46a5 AP |
2174 | static void tcm_free_inst(struct usb_function_instance *f) |
2175 | { | |
2176 | struct f_tcm_opts *opts; | |
2177 | unsigned i; | |
2178 | ||
2179 | opts = container_of(f, struct f_tcm_opts, func_inst); | |
2180 | ||
2181 | mutex_lock(&tpg_instances_lock); | |
2182 | for (i = 0; i < TPG_INSTANCES; ++i) | |
2183 | if (tpg_instances[i].func_inst == f) | |
2184 | break; | |
2185 | if (i < TPG_INSTANCES) | |
2186 | tpg_instances[i].func_inst = NULL; | |
2187 | mutex_unlock(&tpg_instances_lock); | |
2188 | ||
2189 | kfree(opts); | |
2190 | } | |
2191 | ||
4bb8548d AP |
2192 | static int tcm_register_callback(struct usb_function_instance *f) |
2193 | { | |
2194 | struct f_tcm_opts *opts = container_of(f, struct f_tcm_opts, func_inst); | |
2195 | ||
2196 | mutex_lock(&opts->dep_lock); | |
2197 | opts->can_attach = true; | |
2198 | mutex_unlock(&opts->dep_lock); | |
2199 | ||
2200 | return 0; | |
2201 | } | |
2202 | ||
2203 | static void tcm_unregister_callback(struct usb_function_instance *f) | |
2204 | { | |
2205 | struct f_tcm_opts *opts = container_of(f, struct f_tcm_opts, func_inst); | |
2206 | ||
2207 | mutex_lock(&opts->dep_lock); | |
2208 | unregister_gadget_item(opts-> | |
2209 | func_inst.group.cg_item.ci_parent->ci_parent); | |
2210 | opts->can_attach = false; | |
2211 | mutex_unlock(&opts->dep_lock); | |
2212 | } | |
2213 | ||
dc8c46a5 AP |
2214 | static int usbg_attach(struct usbg_tpg *tpg) |
2215 | { | |
2216 | struct usb_function_instance *f = tpg->fi; | |
2217 | struct f_tcm_opts *opts = container_of(f, struct f_tcm_opts, func_inst); | |
2218 | ||
2219 | if (opts->tcm_register_callback) | |
2220 | return opts->tcm_register_callback(f); | |
2221 | ||
2222 | return 0; | |
2223 | } | |
2224 | ||
2225 | static void usbg_detach(struct usbg_tpg *tpg) | |
2226 | { | |
2227 | struct usb_function_instance *f = tpg->fi; | |
2228 | struct f_tcm_opts *opts = container_of(f, struct f_tcm_opts, func_inst); | |
2229 | ||
2230 | if (opts->tcm_unregister_callback) | |
2231 | opts->tcm_unregister_callback(f); | |
2232 | } | |
2233 | ||
2234 | static int tcm_set_name(struct usb_function_instance *f, const char *name) | |
2235 | { | |
2236 | struct f_tcm_opts *opts = container_of(f, struct f_tcm_opts, func_inst); | |
2237 | ||
2238 | pr_debug("tcm: Activating %s\n", name); | |
2239 | ||
2240 | mutex_lock(&opts->dep_lock); | |
2241 | opts->ready = true; | |
2242 | mutex_unlock(&opts->dep_lock); | |
2243 | ||
2244 | return 0; | |
2245 | } | |
2246 | ||
2247 | static struct usb_function_instance *tcm_alloc_inst(void) | |
2248 | { | |
2249 | struct f_tcm_opts *opts; | |
2250 | int i; | |
2251 | ||
2252 | ||
2253 | opts = kzalloc(sizeof(*opts), GFP_KERNEL); | |
2254 | if (!opts) | |
2255 | return ERR_PTR(-ENOMEM); | |
2256 | ||
2257 | mutex_lock(&tpg_instances_lock); | |
2258 | for (i = 0; i < TPG_INSTANCES; ++i) | |
2259 | if (!tpg_instances[i].func_inst) | |
2260 | break; | |
2261 | ||
2262 | if (i == TPG_INSTANCES) { | |
2263 | mutex_unlock(&tpg_instances_lock); | |
2264 | kfree(opts); | |
2265 | return ERR_PTR(-EBUSY); | |
2266 | } | |
2267 | tpg_instances[i].func_inst = &opts->func_inst; | |
2268 | mutex_unlock(&tpg_instances_lock); | |
2269 | ||
2270 | mutex_init(&opts->dep_lock); | |
2271 | opts->func_inst.set_inst_name = tcm_set_name; | |
2272 | opts->func_inst.free_func_inst = tcm_free_inst; | |
4bb8548d AP |
2273 | opts->tcm_register_callback = tcm_register_callback; |
2274 | opts->tcm_unregister_callback = tcm_unregister_callback; | |
2275 | ||
2276 | config_group_init_type_name(&opts->func_inst.group, "", | |
2277 | &tcm_func_type); | |
dc8c46a5 AP |
2278 | |
2279 | return &opts->func_inst; | |
2280 | } | |
2281 | ||
2282 | static void tcm_free(struct usb_function *f) | |
2283 | { | |
2284 | struct f_uas *tcm = to_f_uas(f); | |
2285 | ||
2286 | kfree(tcm); | |
2287 | } | |
2288 | ||
2289 | static void tcm_unbind(struct usb_configuration *c, struct usb_function *f) | |
2290 | { | |
2291 | usb_free_all_descriptors(f); | |
2292 | } | |
2293 | ||
2294 | static struct usb_function *tcm_alloc(struct usb_function_instance *fi) | |
2295 | { | |
2296 | struct f_uas *fu; | |
dc8c46a5 AP |
2297 | unsigned i; |
2298 | ||
2299 | mutex_lock(&tpg_instances_lock); | |
2300 | for (i = 0; i < TPG_INSTANCES; ++i) | |
2301 | if (tpg_instances[i].func_inst == fi) | |
2302 | break; | |
2303 | if (i == TPG_INSTANCES) { | |
2304 | mutex_unlock(&tpg_instances_lock); | |
2305 | return ERR_PTR(-ENODEV); | |
2306 | } | |
2307 | ||
dc8c46a5 AP |
2308 | fu = kzalloc(sizeof(*fu), GFP_KERNEL); |
2309 | if (!fu) { | |
2310 | mutex_unlock(&tpg_instances_lock); | |
2311 | return ERR_PTR(-ENOMEM); | |
2312 | } | |
2313 | ||
2314 | fu->function.name = "Target Function"; | |
2315 | fu->function.bind = tcm_bind; | |
2316 | fu->function.unbind = tcm_unbind; | |
2317 | fu->function.set_alt = tcm_set_alt; | |
2318 | fu->function.setup = tcm_setup; | |
2319 | fu->function.disable = tcm_disable; | |
dc8c46a5 AP |
2320 | fu->function.free_func = tcm_free; |
2321 | fu->tpg = tpg_instances[i].tpg; | |
2322 | mutex_unlock(&tpg_instances_lock); | |
2323 | ||
2324 | return &fu->function; | |
2325 | } | |
2326 | ||
2327 | DECLARE_USB_FUNCTION(tcm, tcm_alloc_inst, tcm_alloc); | |
2328 | ||
2329 | static int tcm_init(void) | |
2330 | { | |
2331 | int ret; | |
2332 | ||
2333 | ret = usb_function_register(&tcmusb_func); | |
2334 | if (ret) | |
2335 | return ret; | |
2336 | ||
2337 | ret = target_register_template(&usbg_ops); | |
2338 | if (ret) | |
2339 | usb_function_unregister(&tcmusb_func); | |
2340 | ||
2341 | return ret; | |
2342 | } | |
2343 | module_init(tcm_init); | |
2344 | ||
2345 | static void tcm_exit(void) | |
2346 | { | |
2347 | target_unregister_template(&usbg_ops); | |
2348 | usb_function_unregister(&tcmusb_func); | |
2349 | } | |
2350 | module_exit(tcm_exit); | |
2351 | ||
2352 | MODULE_LICENSE("GPL"); | |
2353 | MODULE_AUTHOR("Sebastian Andrzej Siewior"); |