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df365423 IPG |
1 | /* |
2 | * WUSB Wire Adapter | |
3 | * Data transfer and URB enqueing | |
4 | * | |
5 | * Copyright (C) 2005-2006 Intel Corporation | |
6 | * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version | |
10 | * 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
20 | * 02110-1301, USA. | |
21 | * | |
22 | * | |
23 | * How transfers work: get a buffer, break it up in segments (segment | |
24 | * size is a multiple of the maxpacket size). For each segment issue a | |
25 | * segment request (struct wa_xfer_*), then send the data buffer if | |
26 | * out or nothing if in (all over the DTO endpoint). | |
27 | * | |
28 | * For each submitted segment request, a notification will come over | |
29 | * the NEP endpoint and a transfer result (struct xfer_result) will | |
30 | * arrive in the DTI URB. Read it, get the xfer ID, see if there is | |
31 | * data coming (inbound transfer), schedule a read and handle it. | |
32 | * | |
33 | * Sounds simple, it is a pain to implement. | |
34 | * | |
35 | * | |
36 | * ENTRY POINTS | |
37 | * | |
38 | * FIXME | |
39 | * | |
40 | * LIFE CYCLE / STATE DIAGRAM | |
41 | * | |
42 | * FIXME | |
43 | * | |
44 | * THIS CODE IS DISGUSTING | |
45 | * | |
46 | * Warned you are; it's my second try and still not happy with it. | |
47 | * | |
48 | * NOTES: | |
49 | * | |
50 | * - No iso | |
51 | * | |
52 | * - Supports DMA xfers, control, bulk and maybe interrupt | |
53 | * | |
54 | * - Does not recycle unused rpipes | |
55 | * | |
56 | * An rpipe is assigned to an endpoint the first time it is used, | |
57 | * and then it's there, assigned, until the endpoint is disabled | |
58 | * (destroyed [{h,d}wahc_op_ep_disable()]. The assignment of the | |
59 | * rpipe to the endpoint is done under the wa->rpipe_sem semaphore | |
60 | * (should be a mutex). | |
61 | * | |
62 | * Two methods it could be done: | |
63 | * | |
25985edc | 64 | * (a) set up a timer every time an rpipe's use count drops to 1 |
df365423 IPG |
65 | * (which means unused) or when a transfer ends. Reset the |
66 | * timer when a xfer is queued. If the timer expires, release | |
67 | * the rpipe [see rpipe_ep_disable()]. | |
68 | * | |
69 | * (b) when looking for free rpipes to attach [rpipe_get_by_ep()], | |
70 | * when none are found go over the list, check their endpoint | |
71 | * and their activity record (if no last-xfer-done-ts in the | |
72 | * last x seconds) take it | |
73 | * | |
74 | * However, due to the fact that we have a set of limited | |
75 | * resources (max-segments-at-the-same-time per xfer, | |
76 | * xfers-per-ripe, blocks-per-rpipe, rpipes-per-host), at the end | |
77 | * we are going to have to rebuild all this based on an scheduler, | |
78 | * to where we have a list of transactions to do and based on the | |
f77f13e2 | 79 | * availability of the different required components (blocks, |
df365423 IPG |
80 | * rpipes, segment slots, etc), we go scheduling them. Painful. |
81 | */ | |
82 | #include <linux/init.h> | |
83 | #include <linux/spinlock.h> | |
5a0e3ad6 | 84 | #include <linux/slab.h> |
df365423 | 85 | #include <linux/hash.h> |
9708cd2f | 86 | #include <linux/ratelimit.h> |
f940fcd8 | 87 | #include <linux/export.h> |
2b81c083 | 88 | #include <linux/scatterlist.h> |
bce83697 | 89 | |
df365423 IPG |
90 | #include "wa-hc.h" |
91 | #include "wusbhc.h" | |
92 | ||
df365423 IPG |
93 | enum { |
94 | WA_SEGS_MAX = 255, | |
95 | }; | |
96 | ||
97 | enum wa_seg_status { | |
98 | WA_SEG_NOTREADY, | |
99 | WA_SEG_READY, | |
100 | WA_SEG_DELAYED, | |
101 | WA_SEG_SUBMITTED, | |
102 | WA_SEG_PENDING, | |
103 | WA_SEG_DTI_PENDING, | |
104 | WA_SEG_DONE, | |
105 | WA_SEG_ERROR, | |
106 | WA_SEG_ABORTED, | |
107 | }; | |
108 | ||
109 | static void wa_xfer_delayed_run(struct wa_rpipe *); | |
679ee475 | 110 | static int __wa_xfer_delayed_run(struct wa_rpipe *rpipe, int *dto_waiting); |
df365423 IPG |
111 | |
112 | /* | |
113 | * Life cycle governed by 'struct urb' (the refcount of the struct is | |
114 | * that of the 'struct urb' and usb_free_urb() would free the whole | |
115 | * struct). | |
116 | */ | |
117 | struct wa_seg { | |
09d94cbd | 118 | struct urb tr_urb; /* transfer request urb. */ |
7a32d9be | 119 | struct urb *isoc_pack_desc_urb; /* for isoc packet descriptor. */ |
09d94cbd | 120 | struct urb *dto_urb; /* for data output. */ |
df365423 IPG |
121 | struct list_head list_node; /* for rpipe->req_list */ |
122 | struct wa_xfer *xfer; /* out xfer */ | |
123 | u8 index; /* which segment we are */ | |
124 | enum wa_seg_status status; | |
125 | ssize_t result; /* bytes xfered or error */ | |
126 | struct wa_xfer_hdr xfer_hdr; | |
df365423 IPG |
127 | }; |
128 | ||
66591015 | 129 | static inline void wa_seg_init(struct wa_seg *seg) |
df365423 | 130 | { |
09d94cbd | 131 | usb_init_urb(&seg->tr_urb); |
66591015 TP |
132 | |
133 | /* set the remaining memory to 0. */ | |
09d94cbd TP |
134 | memset(((void *)seg) + sizeof(seg->tr_urb), 0, |
135 | sizeof(*seg) - sizeof(seg->tr_urb)); | |
df365423 IPG |
136 | } |
137 | ||
138 | /* | |
139 | * Protected by xfer->lock | |
140 | * | |
141 | */ | |
142 | struct wa_xfer { | |
143 | struct kref refcnt; | |
144 | struct list_head list_node; | |
145 | spinlock_t lock; | |
146 | u32 id; | |
147 | ||
148 | struct wahc *wa; /* Wire adapter we are plugged to */ | |
149 | struct usb_host_endpoint *ep; | |
25985edc | 150 | struct urb *urb; /* URB we are transferring for */ |
df365423 IPG |
151 | struct wa_seg **seg; /* transfer segments */ |
152 | u8 segs, segs_submitted, segs_done; | |
153 | unsigned is_inbound:1; | |
154 | unsigned is_dma:1; | |
155 | size_t seg_size; | |
156 | int result; | |
157 | ||
158 | gfp_t gfp; /* allocation mask */ | |
159 | ||
160 | struct wusb_dev *wusb_dev; /* for activity timestamps */ | |
161 | }; | |
162 | ||
163 | static inline void wa_xfer_init(struct wa_xfer *xfer) | |
164 | { | |
165 | kref_init(&xfer->refcnt); | |
166 | INIT_LIST_HEAD(&xfer->list_node); | |
167 | spin_lock_init(&xfer->lock); | |
168 | } | |
169 | ||
170 | /* | |
25985edc | 171 | * Destroy a transfer structure |
df365423 | 172 | * |
7a32d9be | 173 | * Note that freeing xfer->seg[cnt]->tr_urb will free the containing |
79731cbd | 174 | * xfer->seg[cnt] memory that was allocated by __wa_xfer_setup_segs. |
df365423 IPG |
175 | */ |
176 | static void wa_xfer_destroy(struct kref *_xfer) | |
177 | { | |
178 | struct wa_xfer *xfer = container_of(_xfer, struct wa_xfer, refcnt); | |
179 | if (xfer->seg) { | |
180 | unsigned cnt; | |
181 | for (cnt = 0; cnt < xfer->segs; cnt++) { | |
7a32d9be TP |
182 | struct wa_seg *seg = xfer->seg[cnt]; |
183 | if (seg) { | |
184 | usb_free_urb(seg->isoc_pack_desc_urb); | |
185 | if (seg->dto_urb) { | |
186 | kfree(seg->dto_urb->sg); | |
187 | usb_free_urb(seg->dto_urb); | |
d993670c | 188 | } |
7a32d9be | 189 | usb_free_urb(&seg->tr_urb); |
d993670c | 190 | } |
df365423 | 191 | } |
d993670c | 192 | kfree(xfer->seg); |
df365423 IPG |
193 | } |
194 | kfree(xfer); | |
df365423 IPG |
195 | } |
196 | ||
197 | static void wa_xfer_get(struct wa_xfer *xfer) | |
198 | { | |
199 | kref_get(&xfer->refcnt); | |
200 | } | |
201 | ||
202 | static void wa_xfer_put(struct wa_xfer *xfer) | |
203 | { | |
df365423 | 204 | kref_put(&xfer->refcnt, wa_xfer_destroy); |
df365423 IPG |
205 | } |
206 | ||
679ee475 TP |
207 | /* |
208 | * Try to get exclusive access to the DTO endpoint resource. Return true | |
209 | * if successful. | |
210 | */ | |
211 | static inline int __wa_dto_try_get(struct wahc *wa) | |
212 | { | |
213 | return (test_and_set_bit(0, &wa->dto_in_use) == 0); | |
214 | } | |
215 | ||
216 | /* Release the DTO endpoint resource. */ | |
217 | static inline void __wa_dto_put(struct wahc *wa) | |
218 | { | |
219 | clear_bit_unlock(0, &wa->dto_in_use); | |
220 | } | |
221 | ||
222 | /* Service RPIPEs that are waiting on the DTO resource. */ | |
223 | static void wa_check_for_delayed_rpipes(struct wahc *wa) | |
224 | { | |
225 | unsigned long flags; | |
226 | int dto_waiting = 0; | |
227 | struct wa_rpipe *rpipe; | |
228 | ||
229 | spin_lock_irqsave(&wa->rpipe_lock, flags); | |
230 | while (!list_empty(&wa->rpipe_delayed_list) && !dto_waiting) { | |
231 | rpipe = list_first_entry(&wa->rpipe_delayed_list, | |
232 | struct wa_rpipe, list_node); | |
233 | __wa_xfer_delayed_run(rpipe, &dto_waiting); | |
234 | /* remove this RPIPE from the list if it is not waiting. */ | |
235 | if (!dto_waiting) { | |
236 | pr_debug("%s: RPIPE %d serviced and removed from delayed list.\n", | |
237 | __func__, | |
238 | le16_to_cpu(rpipe->descr.wRPipeIndex)); | |
239 | list_del_init(&rpipe->list_node); | |
240 | } | |
241 | } | |
242 | spin_unlock_irqrestore(&wa->rpipe_lock, flags); | |
243 | } | |
244 | ||
245 | /* add this RPIPE to the end of the delayed RPIPE list. */ | |
246 | static void wa_add_delayed_rpipe(struct wahc *wa, struct wa_rpipe *rpipe) | |
247 | { | |
248 | unsigned long flags; | |
249 | ||
250 | spin_lock_irqsave(&wa->rpipe_lock, flags); | |
251 | /* add rpipe to the list if it is not already on it. */ | |
252 | if (list_empty(&rpipe->list_node)) { | |
253 | pr_debug("%s: adding RPIPE %d to the delayed list.\n", | |
254 | __func__, le16_to_cpu(rpipe->descr.wRPipeIndex)); | |
255 | list_add_tail(&rpipe->list_node, &wa->rpipe_delayed_list); | |
256 | } | |
257 | spin_unlock_irqrestore(&wa->rpipe_lock, flags); | |
258 | } | |
259 | ||
df365423 IPG |
260 | /* |
261 | * xfer is referenced | |
262 | * | |
263 | * xfer->lock has to be unlocked | |
264 | * | |
265 | * We take xfer->lock for setting the result; this is a barrier | |
266 | * against drivers/usb/core/hcd.c:unlink1() being called after we call | |
267 | * usb_hcd_giveback_urb() and wa_urb_dequeue() trying to get a | |
268 | * reference to the transfer. | |
269 | */ | |
270 | static void wa_xfer_giveback(struct wa_xfer *xfer) | |
271 | { | |
272 | unsigned long flags; | |
bce83697 | 273 | |
df365423 IPG |
274 | spin_lock_irqsave(&xfer->wa->xfer_list_lock, flags); |
275 | list_del_init(&xfer->list_node); | |
276 | spin_unlock_irqrestore(&xfer->wa->xfer_list_lock, flags); | |
277 | /* FIXME: segmentation broken -- kills DWA */ | |
278 | wusbhc_giveback_urb(xfer->wa->wusb, xfer->urb, xfer->result); | |
279 | wa_put(xfer->wa); | |
280 | wa_xfer_put(xfer); | |
df365423 IPG |
281 | } |
282 | ||
283 | /* | |
284 | * xfer is referenced | |
285 | * | |
286 | * xfer->lock has to be unlocked | |
287 | */ | |
288 | static void wa_xfer_completion(struct wa_xfer *xfer) | |
289 | { | |
df365423 IPG |
290 | if (xfer->wusb_dev) |
291 | wusb_dev_put(xfer->wusb_dev); | |
292 | rpipe_put(xfer->ep->hcpriv); | |
293 | wa_xfer_giveback(xfer); | |
df365423 IPG |
294 | } |
295 | ||
b9c84be6 TP |
296 | /* |
297 | * Initialize a transfer's ID | |
298 | * | |
299 | * We need to use a sequential number; if we use the pointer or the | |
300 | * hash of the pointer, it can repeat over sequential transfers and | |
301 | * then it will confuse the HWA....wonder why in hell they put a 32 | |
302 | * bit handle in there then. | |
303 | */ | |
304 | static void wa_xfer_id_init(struct wa_xfer *xfer) | |
305 | { | |
306 | xfer->id = atomic_add_return(1, &xfer->wa->xfer_id_count); | |
307 | } | |
308 | ||
309 | /* Return the xfer's ID. */ | |
310 | static inline u32 wa_xfer_id(struct wa_xfer *xfer) | |
311 | { | |
312 | return xfer->id; | |
313 | } | |
314 | ||
315 | /* Return the xfer's ID in transport format (little endian). */ | |
316 | static inline __le32 wa_xfer_id_le32(struct wa_xfer *xfer) | |
317 | { | |
318 | return cpu_to_le32(xfer->id); | |
319 | } | |
320 | ||
df365423 IPG |
321 | /* |
322 | * If transfer is done, wrap it up and return true | |
323 | * | |
324 | * xfer->lock has to be locked | |
325 | */ | |
326 | static unsigned __wa_xfer_is_done(struct wa_xfer *xfer) | |
327 | { | |
bce83697 | 328 | struct device *dev = &xfer->wa->usb_iface->dev; |
df365423 IPG |
329 | unsigned result, cnt; |
330 | struct wa_seg *seg; | |
331 | struct urb *urb = xfer->urb; | |
332 | unsigned found_short = 0; | |
333 | ||
df365423 IPG |
334 | result = xfer->segs_done == xfer->segs_submitted; |
335 | if (result == 0) | |
336 | goto out; | |
337 | urb->actual_length = 0; | |
338 | for (cnt = 0; cnt < xfer->segs; cnt++) { | |
339 | seg = xfer->seg[cnt]; | |
340 | switch (seg->status) { | |
341 | case WA_SEG_DONE: | |
342 | if (found_short && seg->result > 0) { | |
b9c84be6 TP |
343 | dev_dbg(dev, "xfer %p ID %08X#%u: bad short segments (%zu)\n", |
344 | xfer, wa_xfer_id(xfer), cnt, | |
345 | seg->result); | |
df365423 IPG |
346 | urb->status = -EINVAL; |
347 | goto out; | |
348 | } | |
349 | urb->actual_length += seg->result; | |
7a32d9be TP |
350 | if (!(usb_pipeisoc(xfer->urb->pipe)) |
351 | && seg->result < xfer->seg_size | |
df365423 IPG |
352 | && cnt != xfer->segs-1) |
353 | found_short = 1; | |
b9c84be6 | 354 | dev_dbg(dev, "xfer %p ID %08X#%u: DONE short %d " |
bce83697 | 355 | "result %zu urb->actual_length %d\n", |
b9c84be6 TP |
356 | xfer, wa_xfer_id(xfer), seg->index, found_short, |
357 | seg->result, urb->actual_length); | |
df365423 IPG |
358 | break; |
359 | case WA_SEG_ERROR: | |
360 | xfer->result = seg->result; | |
cccd3a25 | 361 | dev_dbg(dev, "xfer %p ID %08X#%u: ERROR result %zu(0x%08zX)\n", |
b9c84be6 TP |
362 | xfer, wa_xfer_id(xfer), seg->index, seg->result, |
363 | seg->result); | |
df365423 IPG |
364 | goto out; |
365 | case WA_SEG_ABORTED: | |
b9c84be6 TP |
366 | dev_dbg(dev, "xfer %p ID %08X#%u ABORTED: result %d\n", |
367 | xfer, wa_xfer_id(xfer), seg->index, | |
368 | urb->status); | |
df365423 IPG |
369 | xfer->result = urb->status; |
370 | goto out; | |
371 | default: | |
b9c84be6 TP |
372 | dev_warn(dev, "xfer %p ID %08X#%u: is_done bad state %d\n", |
373 | xfer, wa_xfer_id(xfer), cnt, seg->status); | |
df365423 | 374 | xfer->result = -EINVAL; |
df365423 IPG |
375 | goto out; |
376 | } | |
377 | } | |
378 | xfer->result = 0; | |
379 | out: | |
df365423 IPG |
380 | return result; |
381 | } | |
382 | ||
df365423 IPG |
383 | /* |
384 | * Search for a transfer list ID on the HCD's URB list | |
385 | * | |
386 | * For 32 bit architectures, we use the pointer itself; for 64 bits, a | |
387 | * 32-bit hash of the pointer. | |
388 | * | |
389 | * @returns NULL if not found. | |
390 | */ | |
391 | static struct wa_xfer *wa_xfer_get_by_id(struct wahc *wa, u32 id) | |
392 | { | |
393 | unsigned long flags; | |
394 | struct wa_xfer *xfer_itr; | |
395 | spin_lock_irqsave(&wa->xfer_list_lock, flags); | |
396 | list_for_each_entry(xfer_itr, &wa->xfer_list, list_node) { | |
397 | if (id == xfer_itr->id) { | |
398 | wa_xfer_get(xfer_itr); | |
399 | goto out; | |
400 | } | |
401 | } | |
402 | xfer_itr = NULL; | |
403 | out: | |
404 | spin_unlock_irqrestore(&wa->xfer_list_lock, flags); | |
405 | return xfer_itr; | |
406 | } | |
407 | ||
408 | struct wa_xfer_abort_buffer { | |
409 | struct urb urb; | |
410 | struct wa_xfer_abort cmd; | |
411 | }; | |
412 | ||
413 | static void __wa_xfer_abort_cb(struct urb *urb) | |
414 | { | |
415 | struct wa_xfer_abort_buffer *b = urb->context; | |
416 | usb_put_urb(&b->urb); | |
417 | } | |
418 | ||
419 | /* | |
420 | * Aborts an ongoing transaction | |
421 | * | |
422 | * Assumes the transfer is referenced and locked and in a submitted | |
423 | * state (mainly that there is an endpoint/rpipe assigned). | |
424 | * | |
425 | * The callback (see above) does nothing but freeing up the data by | |
426 | * putting the URB. Because the URB is allocated at the head of the | |
14e1d2df | 427 | * struct, the whole space we allocated is kfreed. * |
df365423 | 428 | */ |
14e1d2df | 429 | static int __wa_xfer_abort(struct wa_xfer *xfer) |
df365423 | 430 | { |
14e1d2df | 431 | int result = -ENOMEM; |
df365423 IPG |
432 | struct device *dev = &xfer->wa->usb_iface->dev; |
433 | struct wa_xfer_abort_buffer *b; | |
434 | struct wa_rpipe *rpipe = xfer->ep->hcpriv; | |
435 | ||
436 | b = kmalloc(sizeof(*b), GFP_ATOMIC); | |
437 | if (b == NULL) | |
438 | goto error_kmalloc; | |
439 | b->cmd.bLength = sizeof(b->cmd); | |
440 | b->cmd.bRequestType = WA_XFER_ABORT; | |
441 | b->cmd.wRPipe = rpipe->descr.wRPipeIndex; | |
fdd160c3 | 442 | b->cmd.dwTransferID = wa_xfer_id_le32(xfer); |
df365423 IPG |
443 | |
444 | usb_init_urb(&b->urb); | |
445 | usb_fill_bulk_urb(&b->urb, xfer->wa->usb_dev, | |
446 | usb_sndbulkpipe(xfer->wa->usb_dev, | |
447 | xfer->wa->dto_epd->bEndpointAddress), | |
448 | &b->cmd, sizeof(b->cmd), __wa_xfer_abort_cb, b); | |
449 | result = usb_submit_urb(&b->urb, GFP_ATOMIC); | |
450 | if (result < 0) | |
451 | goto error_submit; | |
14e1d2df | 452 | return result; /* callback frees! */ |
df365423 IPG |
453 | |
454 | ||
455 | error_submit: | |
456 | if (printk_ratelimit()) | |
457 | dev_err(dev, "xfer %p: Can't submit abort request: %d\n", | |
458 | xfer, result); | |
459 | kfree(b); | |
460 | error_kmalloc: | |
14e1d2df | 461 | return result; |
df365423 IPG |
462 | |
463 | } | |
464 | ||
465 | /* | |
466 | * | |
467 | * @returns < 0 on error, transfer segment request size if ok | |
468 | */ | |
469 | static ssize_t __wa_xfer_setup_sizes(struct wa_xfer *xfer, | |
470 | enum wa_xfer_type *pxfer_type) | |
471 | { | |
472 | ssize_t result; | |
473 | struct device *dev = &xfer->wa->usb_iface->dev; | |
474 | size_t maxpktsize; | |
475 | struct urb *urb = xfer->urb; | |
476 | struct wa_rpipe *rpipe = xfer->ep->hcpriv; | |
477 | ||
df365423 IPG |
478 | switch (rpipe->descr.bmAttribute & 0x3) { |
479 | case USB_ENDPOINT_XFER_CONTROL: | |
480 | *pxfer_type = WA_XFER_TYPE_CTL; | |
481 | result = sizeof(struct wa_xfer_ctl); | |
482 | break; | |
483 | case USB_ENDPOINT_XFER_INT: | |
484 | case USB_ENDPOINT_XFER_BULK: | |
485 | *pxfer_type = WA_XFER_TYPE_BI; | |
486 | result = sizeof(struct wa_xfer_bi); | |
487 | break; | |
488 | case USB_ENDPOINT_XFER_ISOC: | |
7a32d9be TP |
489 | if (usb_pipeout(urb->pipe)) { |
490 | *pxfer_type = WA_XFER_TYPE_ISO; | |
491 | result = sizeof(struct wa_xfer_hwaiso); | |
492 | } else { | |
493 | dev_err(dev, "FIXME: ISOC IN not implemented\n"); | |
494 | result = -ENOSYS; | |
495 | goto error; | |
496 | } | |
497 | break; | |
df365423 IPG |
498 | default: |
499 | /* never happens */ | |
500 | BUG(); | |
501 | result = -EINVAL; /* shut gcc up */ | |
7a32d9be | 502 | } |
df365423 IPG |
503 | xfer->is_inbound = urb->pipe & USB_DIR_IN ? 1 : 0; |
504 | xfer->is_dma = urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP ? 1 : 0; | |
7a32d9be | 505 | |
df365423 | 506 | maxpktsize = le16_to_cpu(rpipe->descr.wMaxPacketSize); |
7a32d9be TP |
507 | if ((rpipe->descr.bmAttribute & 0x3) == USB_ENDPOINT_XFER_ISOC) { |
508 | xfer->seg_size = maxpktsize; | |
509 | xfer->segs = urb->number_of_packets; | |
510 | } else { | |
511 | xfer->seg_size = le16_to_cpu(rpipe->descr.wBlocks) | |
512 | * 1 << (xfer->wa->wa_descr->bRPipeBlockSize - 1); | |
513 | /* Compute the segment size and make sure it is a multiple of | |
514 | * the maxpktsize (WUSB1.0[8.3.3.1])...not really too much of | |
515 | * a check (FIXME) */ | |
516 | if (xfer->seg_size < maxpktsize) { | |
517 | dev_err(dev, | |
518 | "HW BUG? seg_size %zu smaller than maxpktsize %zu\n", | |
519 | xfer->seg_size, maxpktsize); | |
520 | result = -EINVAL; | |
521 | goto error; | |
522 | } | |
523 | xfer->seg_size = (xfer->seg_size / maxpktsize) * maxpktsize; | |
524 | xfer->segs = DIV_ROUND_UP(urb->transfer_buffer_length, | |
525 | xfer->seg_size); | |
526 | if (xfer->segs >= WA_SEGS_MAX) { | |
afc3cba5 | 527 | dev_err(dev, "BUG? oops, number of segments %zu bigger than %d\n", |
7a32d9be TP |
528 | (urb->transfer_buffer_length/xfer->seg_size), |
529 | WA_SEGS_MAX); | |
530 | result = -EINVAL; | |
531 | goto error; | |
532 | } | |
533 | if (xfer->segs == 0 && *pxfer_type == WA_XFER_TYPE_CTL) | |
534 | xfer->segs = 1; | |
df365423 | 535 | } |
df365423 | 536 | error: |
df365423 IPG |
537 | return result; |
538 | } | |
539 | ||
bce83697 | 540 | /* Fill in the common request header and xfer-type specific data. */ |
df365423 IPG |
541 | static void __wa_xfer_setup_hdr0(struct wa_xfer *xfer, |
542 | struct wa_xfer_hdr *xfer_hdr0, | |
543 | enum wa_xfer_type xfer_type, | |
544 | size_t xfer_hdr_size) | |
545 | { | |
546 | struct wa_rpipe *rpipe = xfer->ep->hcpriv; | |
547 | ||
548 | xfer_hdr0 = &xfer->seg[0]->xfer_hdr; | |
549 | xfer_hdr0->bLength = xfer_hdr_size; | |
550 | xfer_hdr0->bRequestType = xfer_type; | |
551 | xfer_hdr0->wRPipe = rpipe->descr.wRPipeIndex; | |
fdd160c3 | 552 | xfer_hdr0->dwTransferID = wa_xfer_id_le32(xfer); |
df365423 IPG |
553 | xfer_hdr0->bTransferSegment = 0; |
554 | switch (xfer_type) { | |
555 | case WA_XFER_TYPE_CTL: { | |
556 | struct wa_xfer_ctl *xfer_ctl = | |
557 | container_of(xfer_hdr0, struct wa_xfer_ctl, hdr); | |
558 | xfer_ctl->bmAttribute = xfer->is_inbound ? 1 : 0; | |
df365423 IPG |
559 | memcpy(&xfer_ctl->baSetupData, xfer->urb->setup_packet, |
560 | sizeof(xfer_ctl->baSetupData)); | |
561 | break; | |
562 | } | |
563 | case WA_XFER_TYPE_BI: | |
564 | break; | |
7a32d9be TP |
565 | case WA_XFER_TYPE_ISO: { |
566 | struct wa_xfer_hwaiso *xfer_iso = | |
567 | container_of(xfer_hdr0, struct wa_xfer_hwaiso, hdr); | |
568 | struct wa_xfer_packet_info_hwaiso *packet_desc = | |
569 | ((void *)xfer_iso) + xfer_hdr_size; | |
570 | struct usb_iso_packet_descriptor *iso_frame_desc = | |
571 | &(xfer->urb->iso_frame_desc[0]); | |
572 | /* populate the isoc section of the transfer request. */ | |
573 | xfer_iso->dwNumOfPackets = cpu_to_le32(1); | |
574 | /* | |
575 | * populate isoc packet descriptor. This assumes 1 | |
576 | * packet per segment. | |
577 | */ | |
578 | packet_desc->wLength = cpu_to_le16(sizeof(*packet_desc) + | |
579 | sizeof(packet_desc->PacketLength[0])); | |
580 | packet_desc->bPacketType = WA_XFER_ISO_PACKET_INFO; | |
581 | packet_desc->PacketLength[0] = | |
582 | cpu_to_le16(iso_frame_desc->length); | |
583 | break; | |
584 | } | |
df365423 IPG |
585 | default: |
586 | BUG(); | |
587 | }; | |
588 | } | |
589 | ||
590 | /* | |
591 | * Callback for the OUT data phase of the segment request | |
592 | * | |
09d94cbd | 593 | * Check wa_seg_tr_cb(); most comments also apply here because this |
df365423 IPG |
594 | * function does almost the same thing and they work closely |
595 | * together. | |
596 | * | |
25985edc | 597 | * If the seg request has failed but this DTO phase has succeeded, |
09d94cbd | 598 | * wa_seg_tr_cb() has already failed the segment and moved the |
df365423 IPG |
599 | * status to WA_SEG_ERROR, so this will go through 'case 0' and |
600 | * effectively do nothing. | |
601 | */ | |
602 | static void wa_seg_dto_cb(struct urb *urb) | |
603 | { | |
604 | struct wa_seg *seg = urb->context; | |
605 | struct wa_xfer *xfer = seg->xfer; | |
606 | struct wahc *wa; | |
607 | struct device *dev; | |
608 | struct wa_rpipe *rpipe; | |
609 | unsigned long flags; | |
610 | unsigned rpipe_ready = 0; | |
611 | u8 done = 0; | |
612 | ||
d5b5c9f2 TP |
613 | /* free the sg if it was used. */ |
614 | kfree(urb->sg); | |
615 | urb->sg = NULL; | |
616 | ||
df365423 IPG |
617 | switch (urb->status) { |
618 | case 0: | |
619 | spin_lock_irqsave(&xfer->lock, flags); | |
620 | wa = xfer->wa; | |
621 | dev = &wa->usb_iface->dev; | |
bce83697 DV |
622 | dev_dbg(dev, "xfer %p#%u: data out done (%d bytes)\n", |
623 | xfer, seg->index, urb->actual_length); | |
df365423 IPG |
624 | if (seg->status < WA_SEG_PENDING) |
625 | seg->status = WA_SEG_PENDING; | |
626 | seg->result = urb->actual_length; | |
627 | spin_unlock_irqrestore(&xfer->lock, flags); | |
628 | break; | |
629 | case -ECONNRESET: /* URB unlinked; no need to do anything */ | |
630 | case -ENOENT: /* as it was done by the who unlinked us */ | |
631 | break; | |
632 | default: /* Other errors ... */ | |
633 | spin_lock_irqsave(&xfer->lock, flags); | |
634 | wa = xfer->wa; | |
635 | dev = &wa->usb_iface->dev; | |
636 | rpipe = xfer->ep->hcpriv; | |
bce83697 DV |
637 | dev_dbg(dev, "xfer %p#%u: data out error %d\n", |
638 | xfer, seg->index, urb->status); | |
df365423 IPG |
639 | if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS, |
640 | EDC_ERROR_TIMEFRAME)){ | |
641 | dev_err(dev, "DTO: URB max acceptable errors " | |
642 | "exceeded, resetting device\n"); | |
643 | wa_reset_all(wa); | |
644 | } | |
645 | if (seg->status != WA_SEG_ERROR) { | |
646 | seg->status = WA_SEG_ERROR; | |
647 | seg->result = urb->status; | |
648 | xfer->segs_done++; | |
649 | __wa_xfer_abort(xfer); | |
650 | rpipe_ready = rpipe_avail_inc(rpipe); | |
651 | done = __wa_xfer_is_done(xfer); | |
652 | } | |
653 | spin_unlock_irqrestore(&xfer->lock, flags); | |
654 | if (done) | |
655 | wa_xfer_completion(xfer); | |
656 | if (rpipe_ready) | |
657 | wa_xfer_delayed_run(rpipe); | |
658 | } | |
df365423 IPG |
659 | } |
660 | ||
7a32d9be TP |
661 | /* |
662 | * Callback for the isoc packet descriptor phase of the segment request | |
663 | * | |
664 | * Check wa_seg_tr_cb(); most comments also apply here because this | |
665 | * function does almost the same thing and they work closely | |
666 | * together. | |
667 | * | |
668 | * If the seg request has failed but this phase has succeeded, | |
669 | * wa_seg_tr_cb() has already failed the segment and moved the | |
670 | * status to WA_SEG_ERROR, so this will go through 'case 0' and | |
671 | * effectively do nothing. | |
672 | */ | |
673 | static void wa_seg_iso_pack_desc_cb(struct urb *urb) | |
674 | { | |
675 | struct wa_seg *seg = urb->context; | |
676 | struct wa_xfer *xfer = seg->xfer; | |
677 | struct wahc *wa; | |
678 | struct device *dev; | |
679 | struct wa_rpipe *rpipe; | |
680 | unsigned long flags; | |
681 | unsigned rpipe_ready = 0; | |
682 | u8 done = 0; | |
683 | ||
684 | switch (urb->status) { | |
685 | case 0: | |
686 | spin_lock_irqsave(&xfer->lock, flags); | |
687 | wa = xfer->wa; | |
688 | dev = &wa->usb_iface->dev; | |
689 | dev_dbg(dev, "iso xfer %p#%u: packet descriptor done\n", | |
690 | xfer, seg->index); | |
691 | if (xfer->is_inbound && seg->status < WA_SEG_PENDING) | |
692 | seg->status = WA_SEG_PENDING; | |
693 | spin_unlock_irqrestore(&xfer->lock, flags); | |
694 | break; | |
695 | case -ECONNRESET: /* URB unlinked; no need to do anything */ | |
696 | case -ENOENT: /* as it was done by the who unlinked us */ | |
697 | break; | |
698 | default: /* Other errors ... */ | |
699 | spin_lock_irqsave(&xfer->lock, flags); | |
700 | wa = xfer->wa; | |
701 | dev = &wa->usb_iface->dev; | |
702 | rpipe = xfer->ep->hcpriv; | |
703 | pr_err_ratelimited("iso xfer %p#%u: packet descriptor error %d\n", | |
704 | xfer, seg->index, urb->status); | |
705 | if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS, | |
706 | EDC_ERROR_TIMEFRAME)){ | |
707 | dev_err(dev, "DTO: URB max acceptable errors exceeded, resetting device\n"); | |
708 | wa_reset_all(wa); | |
709 | } | |
710 | if (seg->status != WA_SEG_ERROR) { | |
711 | usb_unlink_urb(seg->dto_urb); | |
712 | seg->status = WA_SEG_ERROR; | |
713 | seg->result = urb->status; | |
714 | xfer->segs_done++; | |
715 | __wa_xfer_abort(xfer); | |
716 | rpipe_ready = rpipe_avail_inc(rpipe); | |
717 | done = __wa_xfer_is_done(xfer); | |
718 | } | |
719 | spin_unlock_irqrestore(&xfer->lock, flags); | |
720 | if (done) | |
721 | wa_xfer_completion(xfer); | |
722 | if (rpipe_ready) | |
723 | wa_xfer_delayed_run(rpipe); | |
724 | } | |
725 | } | |
726 | ||
df365423 IPG |
727 | /* |
728 | * Callback for the segment request | |
729 | * | |
af901ca1 | 730 | * If successful transition state (unless already transitioned or |
df365423 IPG |
731 | * outbound transfer); otherwise, take a note of the error, mark this |
732 | * segment done and try completion. | |
733 | * | |
734 | * Note we don't access until we are sure that the transfer hasn't | |
735 | * been cancelled (ECONNRESET, ENOENT), which could mean that | |
736 | * seg->xfer could be already gone. | |
737 | * | |
738 | * We have to check before setting the status to WA_SEG_PENDING | |
739 | * because sometimes the xfer result callback arrives before this | |
740 | * callback (geeeeeeze), so it might happen that we are already in | |
7a32d9be | 741 | * another state. As well, we don't set it if the transfer is not inbound, |
df365423 IPG |
742 | * as in that case, wa_seg_dto_cb will do it when the OUT data phase |
743 | * finishes. | |
744 | */ | |
09d94cbd | 745 | static void wa_seg_tr_cb(struct urb *urb) |
df365423 IPG |
746 | { |
747 | struct wa_seg *seg = urb->context; | |
748 | struct wa_xfer *xfer = seg->xfer; | |
749 | struct wahc *wa; | |
750 | struct device *dev; | |
751 | struct wa_rpipe *rpipe; | |
752 | unsigned long flags; | |
753 | unsigned rpipe_ready; | |
754 | u8 done = 0; | |
755 | ||
df365423 IPG |
756 | switch (urb->status) { |
757 | case 0: | |
758 | spin_lock_irqsave(&xfer->lock, flags); | |
759 | wa = xfer->wa; | |
760 | dev = &wa->usb_iface->dev; | |
7a32d9be TP |
761 | dev_dbg(dev, "xfer %p ID 0x%08X#%u: request done\n", |
762 | xfer, wa_xfer_id(xfer), seg->index); | |
763 | if (xfer->is_inbound && | |
764 | seg->status < WA_SEG_PENDING && | |
765 | !(usb_pipeisoc(xfer->urb->pipe))) | |
df365423 IPG |
766 | seg->status = WA_SEG_PENDING; |
767 | spin_unlock_irqrestore(&xfer->lock, flags); | |
768 | break; | |
769 | case -ECONNRESET: /* URB unlinked; no need to do anything */ | |
770 | case -ENOENT: /* as it was done by the who unlinked us */ | |
771 | break; | |
772 | default: /* Other errors ... */ | |
773 | spin_lock_irqsave(&xfer->lock, flags); | |
774 | wa = xfer->wa; | |
775 | dev = &wa->usb_iface->dev; | |
776 | rpipe = xfer->ep->hcpriv; | |
777 | if (printk_ratelimit()) | |
b9c84be6 TP |
778 | dev_err(dev, "xfer %p ID 0x%08X#%u: request error %d\n", |
779 | xfer, wa_xfer_id(xfer), seg->index, | |
780 | urb->status); | |
df365423 IPG |
781 | if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS, |
782 | EDC_ERROR_TIMEFRAME)){ | |
783 | dev_err(dev, "DTO: URB max acceptable errors " | |
784 | "exceeded, resetting device\n"); | |
785 | wa_reset_all(wa); | |
786 | } | |
7a32d9be | 787 | usb_unlink_urb(seg->isoc_pack_desc_urb); |
df365423 IPG |
788 | usb_unlink_urb(seg->dto_urb); |
789 | seg->status = WA_SEG_ERROR; | |
790 | seg->result = urb->status; | |
791 | xfer->segs_done++; | |
792 | __wa_xfer_abort(xfer); | |
793 | rpipe_ready = rpipe_avail_inc(rpipe); | |
794 | done = __wa_xfer_is_done(xfer); | |
795 | spin_unlock_irqrestore(&xfer->lock, flags); | |
796 | if (done) | |
797 | wa_xfer_completion(xfer); | |
798 | if (rpipe_ready) | |
799 | wa_xfer_delayed_run(rpipe); | |
800 | } | |
df365423 IPG |
801 | } |
802 | ||
ffd6d17d TP |
803 | /* |
804 | * Allocate an SG list to store bytes_to_transfer bytes and copy the | |
2b81c083 | 805 | * subset of the in_sg that matches the buffer subset |
ffd6d17d TP |
806 | * we are about to transfer. |
807 | */ | |
2b81c083 TP |
808 | static struct scatterlist *wa_xfer_create_subset_sg(struct scatterlist *in_sg, |
809 | const unsigned int bytes_transferred, | |
810 | const unsigned int bytes_to_transfer, unsigned int *out_num_sgs) | |
811 | { | |
812 | struct scatterlist *out_sg; | |
813 | unsigned int bytes_processed = 0, offset_into_current_page_data = 0, | |
814 | nents; | |
815 | struct scatterlist *current_xfer_sg = in_sg; | |
816 | struct scatterlist *current_seg_sg, *last_seg_sg; | |
817 | ||
818 | /* skip previously transferred pages. */ | |
819 | while ((current_xfer_sg) && | |
820 | (bytes_processed < bytes_transferred)) { | |
821 | bytes_processed += current_xfer_sg->length; | |
822 | ||
823 | /* advance the sg if current segment starts on or past the | |
824 | next page. */ | |
825 | if (bytes_processed <= bytes_transferred) | |
826 | current_xfer_sg = sg_next(current_xfer_sg); | |
827 | } | |
828 | ||
829 | /* the data for the current segment starts in current_xfer_sg. | |
830 | calculate the offset. */ | |
831 | if (bytes_processed > bytes_transferred) { | |
832 | offset_into_current_page_data = current_xfer_sg->length - | |
833 | (bytes_processed - bytes_transferred); | |
834 | } | |
835 | ||
836 | /* calculate the number of pages needed by this segment. */ | |
837 | nents = DIV_ROUND_UP((bytes_to_transfer + | |
838 | offset_into_current_page_data + | |
839 | current_xfer_sg->offset), | |
840 | PAGE_SIZE); | |
841 | ||
842 | out_sg = kmalloc((sizeof(struct scatterlist) * nents), GFP_ATOMIC); | |
843 | if (out_sg) { | |
844 | sg_init_table(out_sg, nents); | |
845 | ||
846 | /* copy the portion of the incoming SG that correlates to the | |
847 | * data to be transferred by this segment to the segment SG. */ | |
848 | last_seg_sg = current_seg_sg = out_sg; | |
849 | bytes_processed = 0; | |
850 | ||
851 | /* reset nents and calculate the actual number of sg entries | |
852 | needed. */ | |
853 | nents = 0; | |
854 | while ((bytes_processed < bytes_to_transfer) && | |
855 | current_seg_sg && current_xfer_sg) { | |
856 | unsigned int page_len = min((current_xfer_sg->length - | |
857 | offset_into_current_page_data), | |
858 | (bytes_to_transfer - bytes_processed)); | |
859 | ||
860 | sg_set_page(current_seg_sg, sg_page(current_xfer_sg), | |
861 | page_len, | |
862 | current_xfer_sg->offset + | |
863 | offset_into_current_page_data); | |
864 | ||
865 | bytes_processed += page_len; | |
866 | ||
867 | last_seg_sg = current_seg_sg; | |
868 | current_seg_sg = sg_next(current_seg_sg); | |
869 | current_xfer_sg = sg_next(current_xfer_sg); | |
870 | ||
871 | /* only the first page may require additional offset. */ | |
872 | offset_into_current_page_data = 0; | |
873 | nents++; | |
874 | } | |
875 | ||
876 | /* update num_sgs and terminate the list since we may have | |
877 | * concatenated pages. */ | |
878 | sg_mark_end(last_seg_sg); | |
879 | *out_num_sgs = nents; | |
880 | } | |
881 | ||
882 | return out_sg; | |
883 | } | |
884 | ||
7a32d9be TP |
885 | /* |
886 | * Populate DMA buffer info for the isoc dto urb. | |
887 | */ | |
888 | static void __wa_populate_dto_urb_iso(struct wa_xfer *xfer, | |
889 | struct wa_seg *seg, int curr_iso_frame) | |
890 | { | |
891 | /* | |
892 | * dto urb buffer address and size pulled from | |
893 | * iso_frame_desc. | |
894 | */ | |
895 | seg->dto_urb->transfer_dma = xfer->urb->transfer_dma + | |
896 | xfer->urb->iso_frame_desc[curr_iso_frame].offset; | |
897 | seg->dto_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
898 | seg->dto_urb->sg = NULL; | |
899 | seg->dto_urb->num_sgs = 0; | |
900 | seg->dto_urb->transfer_buffer_length = | |
901 | xfer->urb->iso_frame_desc[curr_iso_frame].length; | |
902 | } | |
903 | ||
ffd6d17d TP |
904 | /* |
905 | * Populate buffer ptr and size, DMA buffer or SG list for the dto urb. | |
906 | */ | |
907 | static int __wa_populate_dto_urb(struct wa_xfer *xfer, | |
908 | struct wa_seg *seg, size_t buf_itr_offset, size_t buf_itr_size) | |
909 | { | |
910 | int result = 0; | |
911 | ||
912 | if (xfer->is_dma) { | |
913 | seg->dto_urb->transfer_dma = | |
914 | xfer->urb->transfer_dma + buf_itr_offset; | |
915 | seg->dto_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
916 | seg->dto_urb->sg = NULL; | |
917 | seg->dto_urb->num_sgs = 0; | |
918 | } else { | |
919 | /* do buffer or SG processing. */ | |
920 | seg->dto_urb->transfer_flags &= | |
921 | ~URB_NO_TRANSFER_DMA_MAP; | |
922 | /* this should always be 0 before a resubmit. */ | |
923 | seg->dto_urb->num_mapped_sgs = 0; | |
924 | ||
925 | if (xfer->urb->transfer_buffer) { | |
926 | seg->dto_urb->transfer_buffer = | |
927 | xfer->urb->transfer_buffer + | |
928 | buf_itr_offset; | |
929 | seg->dto_urb->sg = NULL; | |
930 | seg->dto_urb->num_sgs = 0; | |
931 | } else { | |
932 | seg->dto_urb->transfer_buffer = NULL; | |
933 | ||
934 | /* | |
935 | * allocate an SG list to store seg_size bytes | |
936 | * and copy the subset of the xfer->urb->sg that | |
937 | * matches the buffer subset we are about to | |
938 | * read. | |
939 | */ | |
940 | seg->dto_urb->sg = wa_xfer_create_subset_sg( | |
941 | xfer->urb->sg, | |
942 | buf_itr_offset, buf_itr_size, | |
943 | &(seg->dto_urb->num_sgs)); | |
944 | if (!(seg->dto_urb->sg)) | |
945 | result = -ENOMEM; | |
946 | } | |
947 | } | |
948 | seg->dto_urb->transfer_buffer_length = buf_itr_size; | |
949 | ||
950 | return result; | |
951 | } | |
952 | ||
df365423 IPG |
953 | /* |
954 | * Allocate the segs array and initialize each of them | |
955 | * | |
956 | * The segments are freed by wa_xfer_destroy() when the xfer use count | |
957 | * drops to zero; however, because each segment is given the same life | |
958 | * cycle as the USB URB it contains, it is actually freed by | |
959 | * usb_put_urb() on the contained USB URB (twisted, eh?). | |
960 | */ | |
961 | static int __wa_xfer_setup_segs(struct wa_xfer *xfer, size_t xfer_hdr_size) | |
962 | { | |
963 | int result, cnt; | |
964 | size_t alloc_size = sizeof(*xfer->seg[0]) | |
965 | - sizeof(xfer->seg[0]->xfer_hdr) + xfer_hdr_size; | |
966 | struct usb_device *usb_dev = xfer->wa->usb_dev; | |
967 | const struct usb_endpoint_descriptor *dto_epd = xfer->wa->dto_epd; | |
968 | struct wa_seg *seg; | |
7a32d9be | 969 | size_t buf_itr, buf_size, buf_itr_size, iso_pkt_descr_size = 0; |
df365423 IPG |
970 | |
971 | result = -ENOMEM; | |
92c4d9bd | 972 | xfer->seg = kcalloc(xfer->segs, sizeof(xfer->seg[0]), GFP_ATOMIC); |
df365423 IPG |
973 | if (xfer->seg == NULL) |
974 | goto error_segs_kzalloc; | |
975 | buf_itr = 0; | |
976 | buf_size = xfer->urb->transfer_buffer_length; | |
7a32d9be TP |
977 | |
978 | if (usb_pipeisoc(xfer->urb->pipe)) { | |
979 | /* | |
980 | * This calculation assumes one isoc packet per xfer segment. | |
981 | * It will need to be updated if this changes. | |
982 | */ | |
983 | iso_pkt_descr_size = sizeof(struct wa_xfer_packet_info_hwaiso) + | |
984 | sizeof(__le16); | |
985 | alloc_size += iso_pkt_descr_size; | |
986 | } | |
987 | ||
df365423 | 988 | for (cnt = 0; cnt < xfer->segs; cnt++) { |
66591015 | 989 | seg = xfer->seg[cnt] = kmalloc(alloc_size, GFP_ATOMIC); |
df365423 | 990 | if (seg == NULL) |
66591015 | 991 | goto error_seg_kmalloc; |
df365423 IPG |
992 | wa_seg_init(seg); |
993 | seg->xfer = xfer; | |
994 | seg->index = cnt; | |
09d94cbd | 995 | usb_fill_bulk_urb(&seg->tr_urb, usb_dev, |
df365423 IPG |
996 | usb_sndbulkpipe(usb_dev, |
997 | dto_epd->bEndpointAddress), | |
998 | &seg->xfer_hdr, xfer_hdr_size, | |
09d94cbd | 999 | wa_seg_tr_cb, seg); |
2b81c083 | 1000 | buf_itr_size = min(buf_size, xfer->seg_size); |
df365423 | 1001 | if (xfer->is_inbound == 0 && buf_size > 0) { |
2b81c083 | 1002 | /* outbound data. */ |
df365423 IPG |
1003 | seg->dto_urb = usb_alloc_urb(0, GFP_ATOMIC); |
1004 | if (seg->dto_urb == NULL) | |
1005 | goto error_dto_alloc; | |
1006 | usb_fill_bulk_urb( | |
1007 | seg->dto_urb, usb_dev, | |
1008 | usb_sndbulkpipe(usb_dev, | |
1009 | dto_epd->bEndpointAddress), | |
1010 | NULL, 0, wa_seg_dto_cb, seg); | |
ffd6d17d | 1011 | |
7a32d9be TP |
1012 | if (usb_pipeisoc(xfer->urb->pipe)) { |
1013 | /* iso packet descriptor. */ | |
1014 | seg->isoc_pack_desc_urb = | |
1015 | usb_alloc_urb(0, GFP_ATOMIC); | |
1016 | if (seg->isoc_pack_desc_urb == NULL) | |
1017 | goto error_iso_pack_desc_alloc; | |
1018 | /* | |
1019 | * The buffer for the isoc packet descriptor | |
1020 | * after the transfer request header in the | |
1021 | * segment object memory buffer. | |
1022 | */ | |
1023 | usb_fill_bulk_urb( | |
1024 | seg->isoc_pack_desc_urb, usb_dev, | |
1025 | usb_sndbulkpipe(usb_dev, | |
1026 | dto_epd->bEndpointAddress), | |
1027 | (void *)(&seg->xfer_hdr) + | |
1028 | xfer_hdr_size, | |
1029 | iso_pkt_descr_size, | |
1030 | wa_seg_iso_pack_desc_cb, seg); | |
ffd6d17d | 1031 | |
7a32d9be TP |
1032 | /* fill in the xfer buffer information. */ |
1033 | __wa_populate_dto_urb_iso(xfer, seg, cnt); | |
1034 | } else { | |
1035 | /* fill in the xfer buffer information. */ | |
1036 | result = __wa_populate_dto_urb(xfer, seg, | |
1037 | buf_itr, buf_itr_size); | |
1038 | if (result < 0) | |
1039 | goto error_seg_outbound_populate; | |
1040 | ||
1041 | buf_itr += buf_itr_size; | |
1042 | buf_size -= buf_itr_size; | |
1043 | } | |
df365423 IPG |
1044 | } |
1045 | seg->status = WA_SEG_READY; | |
df365423 IPG |
1046 | } |
1047 | return 0; | |
1048 | ||
ffd6d17d TP |
1049 | /* |
1050 | * Free the memory for the current segment which failed to init. | |
1051 | * Use the fact that cnt is left at were it failed. The remaining | |
1052 | * segments will be cleaned up by wa_xfer_destroy. | |
1053 | */ | |
7a32d9be | 1054 | error_iso_pack_desc_alloc: |
ffd6d17d | 1055 | error_seg_outbound_populate: |
11b1bf81 | 1056 | usb_free_urb(xfer->seg[cnt]->dto_urb); |
df365423 IPG |
1057 | error_dto_alloc: |
1058 | kfree(xfer->seg[cnt]); | |
ffd6d17d | 1059 | xfer->seg[cnt] = NULL; |
66591015 | 1060 | error_seg_kmalloc: |
df365423 IPG |
1061 | error_segs_kzalloc: |
1062 | return result; | |
1063 | } | |
1064 | ||
1065 | /* | |
1066 | * Allocates all the stuff needed to submit a transfer | |
1067 | * | |
1068 | * Breaks the whole data buffer in a list of segments, each one has a | |
1069 | * structure allocated to it and linked in xfer->seg[index] | |
1070 | * | |
1071 | * FIXME: merge setup_segs() and the last part of this function, no | |
1072 | * need to do two for loops when we could run everything in a | |
1073 | * single one | |
1074 | */ | |
1075 | static int __wa_xfer_setup(struct wa_xfer *xfer, struct urb *urb) | |
1076 | { | |
1077 | int result; | |
1078 | struct device *dev = &xfer->wa->usb_iface->dev; | |
1079 | enum wa_xfer_type xfer_type = 0; /* shut up GCC */ | |
1080 | size_t xfer_hdr_size, cnt, transfer_size; | |
1081 | struct wa_xfer_hdr *xfer_hdr0, *xfer_hdr; | |
1082 | ||
df365423 IPG |
1083 | result = __wa_xfer_setup_sizes(xfer, &xfer_type); |
1084 | if (result < 0) | |
1085 | goto error_setup_sizes; | |
1086 | xfer_hdr_size = result; | |
1087 | result = __wa_xfer_setup_segs(xfer, xfer_hdr_size); | |
1088 | if (result < 0) { | |
1089 | dev_err(dev, "xfer %p: Failed to allocate %d segments: %d\n", | |
1090 | xfer, xfer->segs, result); | |
1091 | goto error_setup_segs; | |
1092 | } | |
1093 | /* Fill the first header */ | |
1094 | xfer_hdr0 = &xfer->seg[0]->xfer_hdr; | |
1095 | wa_xfer_id_init(xfer); | |
1096 | __wa_xfer_setup_hdr0(xfer, xfer_hdr0, xfer_type, xfer_hdr_size); | |
1097 | ||
7a32d9be | 1098 | /* Fill remaining headers */ |
df365423 | 1099 | xfer_hdr = xfer_hdr0; |
7a32d9be TP |
1100 | if (xfer_type == WA_XFER_TYPE_ISO) { |
1101 | xfer_hdr0->dwTransferLength = | |
1102 | cpu_to_le32(xfer->urb->iso_frame_desc[0].length); | |
1103 | for (cnt = 1; cnt < xfer->segs; cnt++) { | |
1104 | struct usb_iso_packet_descriptor *iso_frame_desc = | |
1105 | &(xfer->urb->iso_frame_desc[cnt]); | |
1106 | struct wa_xfer_packet_info_hwaiso *packet_desc; | |
1107 | ||
1108 | xfer_hdr = &xfer->seg[cnt]->xfer_hdr; | |
1109 | packet_desc = ((void *)xfer_hdr) + xfer_hdr_size; | |
1110 | /* | |
1111 | * Copy values from the 0th header and isoc packet | |
1112 | * descriptor. Segment specific values are set below. | |
1113 | */ | |
1114 | memcpy(xfer_hdr, xfer_hdr0, | |
1115 | xfer_hdr_size + sizeof(*packet_desc)); | |
1116 | xfer_hdr->bTransferSegment = cnt; | |
1117 | xfer_hdr->dwTransferLength = | |
1118 | cpu_to_le32(iso_frame_desc->length); | |
1119 | /* populate isoc packet descriptor length. */ | |
1120 | packet_desc->PacketLength[0] = | |
1121 | cpu_to_le16(iso_frame_desc->length); | |
1122 | ||
1123 | xfer->seg[cnt]->status = WA_SEG_READY; | |
1124 | } | |
1125 | } else { | |
1126 | transfer_size = urb->transfer_buffer_length; | |
1127 | xfer_hdr0->dwTransferLength = transfer_size > xfer->seg_size ? | |
1128 | cpu_to_le32(xfer->seg_size) : | |
1129 | cpu_to_le32(transfer_size); | |
df365423 | 1130 | transfer_size -= xfer->seg_size; |
7a32d9be TP |
1131 | for (cnt = 1; cnt < xfer->segs; cnt++) { |
1132 | xfer_hdr = &xfer->seg[cnt]->xfer_hdr; | |
1133 | memcpy(xfer_hdr, xfer_hdr0, xfer_hdr_size); | |
1134 | xfer_hdr->bTransferSegment = cnt; | |
1135 | xfer_hdr->dwTransferLength = | |
1136 | transfer_size > xfer->seg_size ? | |
1137 | cpu_to_le32(xfer->seg_size) | |
1138 | : cpu_to_le32(transfer_size); | |
1139 | xfer->seg[cnt]->status = WA_SEG_READY; | |
1140 | transfer_size -= xfer->seg_size; | |
1141 | } | |
df365423 IPG |
1142 | } |
1143 | xfer_hdr->bTransferSegment |= 0x80; /* this is the last segment */ | |
1144 | result = 0; | |
1145 | error_setup_segs: | |
1146 | error_setup_sizes: | |
df365423 IPG |
1147 | return result; |
1148 | } | |
1149 | ||
1150 | /* | |
1151 | * | |
1152 | * | |
1153 | * rpipe->seg_lock is held! | |
1154 | */ | |
1155 | static int __wa_seg_submit(struct wa_rpipe *rpipe, struct wa_xfer *xfer, | |
679ee475 | 1156 | struct wa_seg *seg, int *dto_done) |
df365423 IPG |
1157 | { |
1158 | int result; | |
679ee475 TP |
1159 | |
1160 | /* default to done unless we encounter a multi-frame isoc segment. */ | |
1161 | *dto_done = 1; | |
1162 | ||
09d94cbd TP |
1163 | /* submit the transfer request. */ |
1164 | result = usb_submit_urb(&seg->tr_urb, GFP_ATOMIC); | |
df365423 | 1165 | if (result < 0) { |
7a32d9be TP |
1166 | pr_err("%s: xfer %p#%u: REQ submit failed: %d\n", |
1167 | __func__, xfer, seg->index, result); | |
df365423 IPG |
1168 | goto error_seg_submit; |
1169 | } | |
7a32d9be TP |
1170 | /* submit the isoc packet descriptor if present. */ |
1171 | if (seg->isoc_pack_desc_urb) { | |
1172 | result = usb_submit_urb(seg->isoc_pack_desc_urb, GFP_ATOMIC); | |
1173 | if (result < 0) { | |
1174 | pr_err("%s: xfer %p#%u: ISO packet descriptor submit failed: %d\n", | |
1175 | __func__, xfer, seg->index, result); | |
1176 | goto error_iso_pack_desc_submit; | |
1177 | } | |
1178 | } | |
09d94cbd | 1179 | /* submit the out data if this is an out request. */ |
df365423 IPG |
1180 | if (seg->dto_urb) { |
1181 | result = usb_submit_urb(seg->dto_urb, GFP_ATOMIC); | |
1182 | if (result < 0) { | |
7a32d9be TP |
1183 | pr_err("%s: xfer %p#%u: DTO submit failed: %d\n", |
1184 | __func__, xfer, seg->index, result); | |
df365423 IPG |
1185 | goto error_dto_submit; |
1186 | } | |
1187 | } | |
1188 | seg->status = WA_SEG_SUBMITTED; | |
1189 | rpipe_avail_dec(rpipe); | |
1190 | return 0; | |
1191 | ||
1192 | error_dto_submit: | |
7a32d9be TP |
1193 | usb_unlink_urb(seg->isoc_pack_desc_urb); |
1194 | error_iso_pack_desc_submit: | |
09d94cbd | 1195 | usb_unlink_urb(&seg->tr_urb); |
df365423 IPG |
1196 | error_seg_submit: |
1197 | seg->status = WA_SEG_ERROR; | |
1198 | seg->result = result; | |
1199 | return result; | |
1200 | } | |
1201 | ||
1202 | /* | |
679ee475 TP |
1203 | * Execute more queued request segments until the maximum concurrent allowed. |
1204 | * Return true if the DTO resource was acquired and released. | |
df365423 IPG |
1205 | * |
1206 | * The ugly unlock/lock sequence on the error path is needed as the | |
1207 | * xfer->lock normally nests the seg_lock and not viceversa. | |
df365423 | 1208 | */ |
679ee475 | 1209 | static int __wa_xfer_delayed_run(struct wa_rpipe *rpipe, int *dto_waiting) |
df365423 | 1210 | { |
679ee475 | 1211 | int result, dto_acquired = 0, dto_done = 0; |
df365423 IPG |
1212 | struct device *dev = &rpipe->wa->usb_iface->dev; |
1213 | struct wa_seg *seg; | |
1214 | struct wa_xfer *xfer; | |
1215 | unsigned long flags; | |
1216 | ||
679ee475 TP |
1217 | *dto_waiting = 0; |
1218 | ||
df365423 IPG |
1219 | spin_lock_irqsave(&rpipe->seg_lock, flags); |
1220 | while (atomic_read(&rpipe->segs_available) > 0 | |
679ee475 TP |
1221 | && !list_empty(&rpipe->seg_list) |
1222 | && (dto_acquired = __wa_dto_try_get(rpipe->wa))) { | |
e9a088fa | 1223 | seg = list_first_entry(&(rpipe->seg_list), struct wa_seg, |
df365423 IPG |
1224 | list_node); |
1225 | list_del(&seg->list_node); | |
1226 | xfer = seg->xfer; | |
679ee475 TP |
1227 | result = __wa_seg_submit(rpipe, xfer, seg, &dto_done); |
1228 | /* release the dto resource if this RPIPE is done with it. */ | |
1229 | if (dto_done) | |
1230 | __wa_dto_put(rpipe->wa); | |
b9c84be6 TP |
1231 | dev_dbg(dev, "xfer %p ID %08X#%u submitted from delayed [%d segments available] %d\n", |
1232 | xfer, wa_xfer_id(xfer), seg->index, | |
1233 | atomic_read(&rpipe->segs_available), result); | |
df365423 IPG |
1234 | if (unlikely(result < 0)) { |
1235 | spin_unlock_irqrestore(&rpipe->seg_lock, flags); | |
1236 | spin_lock_irqsave(&xfer->lock, flags); | |
1237 | __wa_xfer_abort(xfer); | |
1238 | xfer->segs_done++; | |
1239 | spin_unlock_irqrestore(&xfer->lock, flags); | |
1240 | spin_lock_irqsave(&rpipe->seg_lock, flags); | |
1241 | } | |
1242 | } | |
679ee475 TP |
1243 | /* |
1244 | * Mark this RPIPE as waiting if dto was not acquired, there are | |
1245 | * delayed segs and no active transfers to wake us up later. | |
1246 | */ | |
1247 | if (!dto_acquired && !list_empty(&rpipe->seg_list) | |
1248 | && (atomic_read(&rpipe->segs_available) == | |
1249 | le16_to_cpu(rpipe->descr.wRequests))) | |
1250 | *dto_waiting = 1; | |
1251 | ||
df365423 | 1252 | spin_unlock_irqrestore(&rpipe->seg_lock, flags); |
679ee475 TP |
1253 | |
1254 | return dto_done; | |
1255 | } | |
1256 | ||
1257 | static void wa_xfer_delayed_run(struct wa_rpipe *rpipe) | |
1258 | { | |
1259 | int dto_waiting; | |
1260 | int dto_done = __wa_xfer_delayed_run(rpipe, &dto_waiting); | |
1261 | ||
1262 | /* | |
1263 | * If this RPIPE is waiting on the DTO resource, add it to the tail of | |
1264 | * the waiting list. | |
1265 | * Otherwise, if the WA DTO resource was acquired and released by | |
1266 | * __wa_xfer_delayed_run, another RPIPE may have attempted to acquire | |
1267 | * DTO and failed during that time. Check the delayed list and process | |
1268 | * any waiters. Start searching from the next RPIPE index. | |
1269 | */ | |
1270 | if (dto_waiting) | |
1271 | wa_add_delayed_rpipe(rpipe->wa, rpipe); | |
1272 | else if (dto_done) | |
1273 | wa_check_for_delayed_rpipes(rpipe->wa); | |
df365423 IPG |
1274 | } |
1275 | ||
1276 | /* | |
1277 | * | |
1278 | * xfer->lock is taken | |
1279 | * | |
1280 | * On failure submitting we just stop submitting and return error; | |
1281 | * wa_urb_enqueue_b() will execute the completion path | |
1282 | */ | |
1283 | static int __wa_xfer_submit(struct wa_xfer *xfer) | |
1284 | { | |
679ee475 | 1285 | int result, dto_acquired = 0, dto_done = 0, dto_waiting = 0; |
df365423 IPG |
1286 | struct wahc *wa = xfer->wa; |
1287 | struct device *dev = &wa->usb_iface->dev; | |
1288 | unsigned cnt; | |
1289 | struct wa_seg *seg; | |
1290 | unsigned long flags; | |
1291 | struct wa_rpipe *rpipe = xfer->ep->hcpriv; | |
1292 | size_t maxrequests = le16_to_cpu(rpipe->descr.wRequests); | |
1293 | u8 available; | |
1294 | u8 empty; | |
1295 | ||
df365423 IPG |
1296 | spin_lock_irqsave(&wa->xfer_list_lock, flags); |
1297 | list_add_tail(&xfer->list_node, &wa->xfer_list); | |
1298 | spin_unlock_irqrestore(&wa->xfer_list_lock, flags); | |
1299 | ||
1300 | BUG_ON(atomic_read(&rpipe->segs_available) > maxrequests); | |
1301 | result = 0; | |
1302 | spin_lock_irqsave(&rpipe->seg_lock, flags); | |
1303 | for (cnt = 0; cnt < xfer->segs; cnt++) { | |
679ee475 TP |
1304 | int delay_seg = 1; |
1305 | ||
df365423 IPG |
1306 | available = atomic_read(&rpipe->segs_available); |
1307 | empty = list_empty(&rpipe->seg_list); | |
1308 | seg = xfer->seg[cnt]; | |
b9c84be6 TP |
1309 | dev_dbg(dev, "xfer %p ID 0x%08X#%u: available %u empty %u (%s)\n", |
1310 | xfer, wa_xfer_id(xfer), cnt, available, empty, | |
bce83697 | 1311 | available == 0 || !empty ? "delayed" : "submitted"); |
679ee475 TP |
1312 | if (available && empty) { |
1313 | /* | |
1314 | * Only attempt to acquire DTO if we have a segment | |
1315 | * to send. | |
1316 | */ | |
1317 | dto_acquired = __wa_dto_try_get(rpipe->wa); | |
1318 | if (dto_acquired) { | |
1319 | delay_seg = 0; | |
1320 | result = __wa_seg_submit(rpipe, xfer, seg, | |
1321 | &dto_done); | |
1322 | if (dto_done) | |
1323 | __wa_dto_put(rpipe->wa); | |
1324 | ||
1325 | if (result < 0) { | |
1326 | __wa_xfer_abort(xfer); | |
1327 | goto error_seg_submit; | |
1328 | } | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | if (delay_seg) { | |
df365423 IPG |
1333 | seg->status = WA_SEG_DELAYED; |
1334 | list_add_tail(&seg->list_node, &rpipe->seg_list); | |
df365423 IPG |
1335 | } |
1336 | xfer->segs_submitted++; | |
1337 | } | |
df365423 | 1338 | error_seg_submit: |
679ee475 TP |
1339 | /* |
1340 | * Mark this RPIPE as waiting if dto was not acquired, there are | |
1341 | * delayed segs and no active transfers to wake us up later. | |
1342 | */ | |
1343 | if (!dto_acquired && !list_empty(&rpipe->seg_list) | |
1344 | && (atomic_read(&rpipe->segs_available) == | |
1345 | le16_to_cpu(rpipe->descr.wRequests))) | |
1346 | dto_waiting = 1; | |
df365423 | 1347 | spin_unlock_irqrestore(&rpipe->seg_lock, flags); |
679ee475 TP |
1348 | |
1349 | if (dto_waiting) | |
1350 | wa_add_delayed_rpipe(rpipe->wa, rpipe); | |
1351 | else if (dto_done) | |
1352 | wa_check_for_delayed_rpipes(rpipe->wa); | |
1353 | ||
df365423 IPG |
1354 | return result; |
1355 | } | |
1356 | ||
1357 | /* | |
1358 | * Second part of a URB/transfer enqueuement | |
1359 | * | |
1360 | * Assumes this comes from wa_urb_enqueue() [maybe through | |
1361 | * wa_urb_enqueue_run()]. At this point: | |
1362 | * | |
1363 | * xfer->wa filled and refcounted | |
1364 | * xfer->ep filled with rpipe refcounted if | |
1365 | * delayed == 0 | |
1366 | * xfer->urb filled and refcounted (this is the case when called | |
1367 | * from wa_urb_enqueue() as we come from usb_submit_urb() | |
1368 | * and when called by wa_urb_enqueue_run(), as we took an | |
1369 | * extra ref dropped by _run() after we return). | |
1370 | * xfer->gfp filled | |
1371 | * | |
1372 | * If we fail at __wa_xfer_submit(), then we just check if we are done | |
1373 | * and if so, we run the completion procedure. However, if we are not | |
1374 | * yet done, we do nothing and wait for the completion handlers from | |
1375 | * the submitted URBs or from the xfer-result path to kick in. If xfer | |
1376 | * result never kicks in, the xfer will timeout from the USB code and | |
1377 | * dequeue() will be called. | |
1378 | */ | |
33186c44 | 1379 | static int wa_urb_enqueue_b(struct wa_xfer *xfer) |
df365423 IPG |
1380 | { |
1381 | int result; | |
1382 | unsigned long flags; | |
1383 | struct urb *urb = xfer->urb; | |
1384 | struct wahc *wa = xfer->wa; | |
1385 | struct wusbhc *wusbhc = wa->wusb; | |
df365423 IPG |
1386 | struct wusb_dev *wusb_dev; |
1387 | unsigned done; | |
1388 | ||
df365423 | 1389 | result = rpipe_get_by_ep(wa, xfer->ep, urb, xfer->gfp); |
33186c44 TP |
1390 | if (result < 0) { |
1391 | pr_err("%s: error_rpipe_get\n", __func__); | |
df365423 | 1392 | goto error_rpipe_get; |
33186c44 | 1393 | } |
df365423 IPG |
1394 | result = -ENODEV; |
1395 | /* FIXME: segmentation broken -- kills DWA */ | |
1396 | mutex_lock(&wusbhc->mutex); /* get a WUSB dev */ | |
49fa0921 JS |
1397 | if (urb->dev == NULL) { |
1398 | mutex_unlock(&wusbhc->mutex); | |
33186c44 | 1399 | pr_err("%s: error usb dev gone\n", __func__); |
df365423 | 1400 | goto error_dev_gone; |
49fa0921 | 1401 | } |
df365423 IPG |
1402 | wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, urb->dev); |
1403 | if (wusb_dev == NULL) { | |
1404 | mutex_unlock(&wusbhc->mutex); | |
33186c44 | 1405 | pr_err("%s: error wusb dev gone\n", __func__); |
df365423 IPG |
1406 | goto error_dev_gone; |
1407 | } | |
1408 | mutex_unlock(&wusbhc->mutex); | |
1409 | ||
1410 | spin_lock_irqsave(&xfer->lock, flags); | |
1411 | xfer->wusb_dev = wusb_dev; | |
1412 | result = urb->status; | |
33186c44 TP |
1413 | if (urb->status != -EINPROGRESS) { |
1414 | pr_err("%s: error_dequeued\n", __func__); | |
df365423 | 1415 | goto error_dequeued; |
33186c44 | 1416 | } |
df365423 IPG |
1417 | |
1418 | result = __wa_xfer_setup(xfer, urb); | |
33186c44 TP |
1419 | if (result < 0) { |
1420 | pr_err("%s: error_xfer_setup\n", __func__); | |
df365423 | 1421 | goto error_xfer_setup; |
33186c44 | 1422 | } |
df365423 | 1423 | result = __wa_xfer_submit(xfer); |
33186c44 TP |
1424 | if (result < 0) { |
1425 | pr_err("%s: error_xfer_submit\n", __func__); | |
df365423 | 1426 | goto error_xfer_submit; |
33186c44 | 1427 | } |
df365423 | 1428 | spin_unlock_irqrestore(&xfer->lock, flags); |
33186c44 | 1429 | return 0; |
df365423 | 1430 | |
33186c44 TP |
1431 | /* |
1432 | * this is basically wa_xfer_completion() broken up wa_xfer_giveback() | |
1433 | * does a wa_xfer_put() that will call wa_xfer_destroy() and undo | |
1434 | * setup(). | |
df365423 IPG |
1435 | */ |
1436 | error_xfer_setup: | |
1437 | error_dequeued: | |
1438 | spin_unlock_irqrestore(&xfer->lock, flags); | |
1439 | /* FIXME: segmentation broken, kills DWA */ | |
1440 | if (wusb_dev) | |
1441 | wusb_dev_put(wusb_dev); | |
1442 | error_dev_gone: | |
1443 | rpipe_put(xfer->ep->hcpriv); | |
1444 | error_rpipe_get: | |
1445 | xfer->result = result; | |
33186c44 | 1446 | return result; |
df365423 IPG |
1447 | |
1448 | error_xfer_submit: | |
1449 | done = __wa_xfer_is_done(xfer); | |
1450 | xfer->result = result; | |
1451 | spin_unlock_irqrestore(&xfer->lock, flags); | |
1452 | if (done) | |
1453 | wa_xfer_completion(xfer); | |
33186c44 TP |
1454 | /* return success since the completion routine will run. */ |
1455 | return 0; | |
df365423 IPG |
1456 | } |
1457 | ||
1458 | /* | |
1459 | * Execute the delayed transfers in the Wire Adapter @wa | |
1460 | * | |
1461 | * We need to be careful here, as dequeue() could be called in the | |
1462 | * middle. That's why we do the whole thing under the | |
e9a088fa | 1463 | * wa->xfer_list_lock. If dequeue() jumps in, it first locks xfer->lock |
df365423 | 1464 | * and then checks the list -- so as we would be acquiring in inverse |
e9a088fa TP |
1465 | * order, we move the delayed list to a separate list while locked and then |
1466 | * submit them without the list lock held. | |
df365423 IPG |
1467 | */ |
1468 | void wa_urb_enqueue_run(struct work_struct *ws) | |
1469 | { | |
6d33f7bb | 1470 | struct wahc *wa = container_of(ws, struct wahc, xfer_enqueue_work); |
df365423 IPG |
1471 | struct wa_xfer *xfer, *next; |
1472 | struct urb *urb; | |
e9a088fa | 1473 | LIST_HEAD(tmp_list); |
df365423 | 1474 | |
e9a088fa | 1475 | /* Create a copy of the wa->xfer_delayed_list while holding the lock */ |
df365423 | 1476 | spin_lock_irq(&wa->xfer_list_lock); |
e9a088fa TP |
1477 | list_cut_position(&tmp_list, &wa->xfer_delayed_list, |
1478 | wa->xfer_delayed_list.prev); | |
1479 | spin_unlock_irq(&wa->xfer_list_lock); | |
1480 | ||
1481 | /* | |
1482 | * enqueue from temp list without list lock held since wa_urb_enqueue_b | |
1483 | * can take xfer->lock as well as lock mutexes. | |
1484 | */ | |
1485 | list_for_each_entry_safe(xfer, next, &tmp_list, list_node) { | |
df365423 | 1486 | list_del_init(&xfer->list_node); |
df365423 IPG |
1487 | |
1488 | urb = xfer->urb; | |
33186c44 TP |
1489 | if (wa_urb_enqueue_b(xfer) < 0) |
1490 | wa_xfer_giveback(xfer); | |
df365423 | 1491 | usb_put_urb(urb); /* taken when queuing */ |
df365423 | 1492 | } |
df365423 IPG |
1493 | } |
1494 | EXPORT_SYMBOL_GPL(wa_urb_enqueue_run); | |
1495 | ||
6d33f7bb TP |
1496 | /* |
1497 | * Process the errored transfers on the Wire Adapter outside of interrupt. | |
1498 | */ | |
1499 | void wa_process_errored_transfers_run(struct work_struct *ws) | |
1500 | { | |
1501 | struct wahc *wa = container_of(ws, struct wahc, xfer_error_work); | |
1502 | struct wa_xfer *xfer, *next; | |
1503 | LIST_HEAD(tmp_list); | |
1504 | ||
1505 | pr_info("%s: Run delayed STALL processing.\n", __func__); | |
1506 | ||
1507 | /* Create a copy of the wa->xfer_errored_list while holding the lock */ | |
1508 | spin_lock_irq(&wa->xfer_list_lock); | |
1509 | list_cut_position(&tmp_list, &wa->xfer_errored_list, | |
1510 | wa->xfer_errored_list.prev); | |
1511 | spin_unlock_irq(&wa->xfer_list_lock); | |
1512 | ||
1513 | /* | |
1514 | * run rpipe_clear_feature_stalled from temp list without list lock | |
1515 | * held. | |
1516 | */ | |
1517 | list_for_each_entry_safe(xfer, next, &tmp_list, list_node) { | |
1518 | struct usb_host_endpoint *ep; | |
1519 | unsigned long flags; | |
1520 | struct wa_rpipe *rpipe; | |
1521 | ||
1522 | spin_lock_irqsave(&xfer->lock, flags); | |
1523 | ep = xfer->ep; | |
1524 | rpipe = ep->hcpriv; | |
1525 | spin_unlock_irqrestore(&xfer->lock, flags); | |
1526 | ||
1527 | /* clear RPIPE feature stalled without holding a lock. */ | |
1528 | rpipe_clear_feature_stalled(wa, ep); | |
1529 | ||
1530 | /* complete the xfer. This removes it from the tmp list. */ | |
1531 | wa_xfer_completion(xfer); | |
1532 | ||
1533 | /* check for work. */ | |
1534 | wa_xfer_delayed_run(rpipe); | |
1535 | } | |
1536 | } | |
1537 | EXPORT_SYMBOL_GPL(wa_process_errored_transfers_run); | |
1538 | ||
df365423 IPG |
1539 | /* |
1540 | * Submit a transfer to the Wire Adapter in a delayed way | |
1541 | * | |
1542 | * The process of enqueuing involves possible sleeps() [see | |
1543 | * enqueue_b(), for the rpipe_get() and the mutex_lock()]. If we are | |
1544 | * in an atomic section, we defer the enqueue_b() call--else we call direct. | |
1545 | * | |
1546 | * @urb: We own a reference to it done by the HCI Linux USB stack that | |
1547 | * will be given up by calling usb_hcd_giveback_urb() or by | |
1548 | * returning error from this function -> ergo we don't have to | |
1549 | * refcount it. | |
1550 | */ | |
1551 | int wa_urb_enqueue(struct wahc *wa, struct usb_host_endpoint *ep, | |
1552 | struct urb *urb, gfp_t gfp) | |
1553 | { | |
1554 | int result; | |
1555 | struct device *dev = &wa->usb_iface->dev; | |
1556 | struct wa_xfer *xfer; | |
1557 | unsigned long my_flags; | |
1558 | unsigned cant_sleep = irqs_disabled() | in_atomic(); | |
1559 | ||
2b81c083 TP |
1560 | if ((urb->transfer_buffer == NULL) |
1561 | && (urb->sg == NULL) | |
df365423 IPG |
1562 | && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) |
1563 | && urb->transfer_buffer_length != 0) { | |
1564 | dev_err(dev, "BUG? urb %p: NULL xfer buffer & NODMA\n", urb); | |
1565 | dump_stack(); | |
1566 | } | |
1567 | ||
1568 | result = -ENOMEM; | |
1569 | xfer = kzalloc(sizeof(*xfer), gfp); | |
1570 | if (xfer == NULL) | |
1571 | goto error_kmalloc; | |
1572 | ||
1573 | result = -ENOENT; | |
1574 | if (urb->status != -EINPROGRESS) /* cancelled */ | |
1575 | goto error_dequeued; /* before starting? */ | |
1576 | wa_xfer_init(xfer); | |
1577 | xfer->wa = wa_get(wa); | |
1578 | xfer->urb = urb; | |
1579 | xfer->gfp = gfp; | |
1580 | xfer->ep = ep; | |
1581 | urb->hcpriv = xfer; | |
bce83697 DV |
1582 | |
1583 | dev_dbg(dev, "xfer %p urb %p pipe 0x%02x [%d bytes] %s %s %s\n", | |
1584 | xfer, urb, urb->pipe, urb->transfer_buffer_length, | |
1585 | urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP ? "dma" : "nodma", | |
1586 | urb->pipe & USB_DIR_IN ? "inbound" : "outbound", | |
1587 | cant_sleep ? "deferred" : "inline"); | |
1588 | ||
df365423 IPG |
1589 | if (cant_sleep) { |
1590 | usb_get_urb(urb); | |
1591 | spin_lock_irqsave(&wa->xfer_list_lock, my_flags); | |
1592 | list_add_tail(&xfer->list_node, &wa->xfer_delayed_list); | |
1593 | spin_unlock_irqrestore(&wa->xfer_list_lock, my_flags); | |
6d33f7bb | 1594 | queue_work(wusbd, &wa->xfer_enqueue_work); |
df365423 | 1595 | } else { |
33186c44 TP |
1596 | result = wa_urb_enqueue_b(xfer); |
1597 | if (result < 0) { | |
1598 | /* | |
1599 | * URB submit/enqueue failed. Clean up, return an | |
1600 | * error and do not run the callback. This avoids | |
1601 | * an infinite submit/complete loop. | |
1602 | */ | |
1603 | dev_err(dev, "%s: URB enqueue failed: %d\n", | |
1604 | __func__, result); | |
1605 | wa_put(xfer->wa); | |
1606 | wa_xfer_put(xfer); | |
1607 | return result; | |
1608 | } | |
df365423 | 1609 | } |
df365423 IPG |
1610 | return 0; |
1611 | ||
1612 | error_dequeued: | |
1613 | kfree(xfer); | |
1614 | error_kmalloc: | |
df365423 IPG |
1615 | return result; |
1616 | } | |
1617 | EXPORT_SYMBOL_GPL(wa_urb_enqueue); | |
1618 | ||
1619 | /* | |
1620 | * Dequeue a URB and make sure uwb_hcd_giveback_urb() [completion | |
1621 | * handler] is called. | |
1622 | * | |
1623 | * Until a transfer goes successfully through wa_urb_enqueue() it | |
1624 | * needs to be dequeued with completion calling; when stuck in delayed | |
1625 | * or before wa_xfer_setup() is called, we need to do completion. | |
1626 | * | |
1627 | * not setup If there is no hcpriv yet, that means that that enqueue | |
1628 | * still had no time to set the xfer up. Because | |
1629 | * urb->status should be other than -EINPROGRESS, | |
1630 | * enqueue() will catch that and bail out. | |
1631 | * | |
1632 | * If the transfer has gone through setup, we just need to clean it | |
1633 | * up. If it has gone through submit(), we have to abort it [with an | |
1634 | * asynch request] and then make sure we cancel each segment. | |
1635 | * | |
1636 | */ | |
1637 | int wa_urb_dequeue(struct wahc *wa, struct urb *urb) | |
1638 | { | |
df365423 IPG |
1639 | unsigned long flags, flags2; |
1640 | struct wa_xfer *xfer; | |
1641 | struct wa_seg *seg; | |
1642 | struct wa_rpipe *rpipe; | |
14e1d2df | 1643 | unsigned cnt, done = 0, xfer_abort_pending; |
df365423 IPG |
1644 | unsigned rpipe_ready = 0; |
1645 | ||
df365423 IPG |
1646 | xfer = urb->hcpriv; |
1647 | if (xfer == NULL) { | |
6d33f7bb TP |
1648 | /* |
1649 | * Nothing setup yet enqueue will see urb->status != | |
df365423 IPG |
1650 | * -EINPROGRESS (by hcd layer) and bail out with |
1651 | * error, no need to do completion | |
1652 | */ | |
1653 | BUG_ON(urb->status == -EINPROGRESS); | |
1654 | goto out; | |
1655 | } | |
1656 | spin_lock_irqsave(&xfer->lock, flags); | |
14e1d2df | 1657 | pr_debug("%s: DEQUEUE xfer id 0x%08X\n", __func__, wa_xfer_id(xfer)); |
df365423 | 1658 | rpipe = xfer->ep->hcpriv; |
ec58fad1 TP |
1659 | if (rpipe == NULL) { |
1660 | pr_debug("%s: xfer id 0x%08X has no RPIPE. %s", | |
1661 | __func__, wa_xfer_id(xfer), | |
1662 | "Probably already aborted.\n" ); | |
1663 | goto out_unlock; | |
1664 | } | |
df365423 IPG |
1665 | /* Check the delayed list -> if there, release and complete */ |
1666 | spin_lock_irqsave(&wa->xfer_list_lock, flags2); | |
1667 | if (!list_empty(&xfer->list_node) && xfer->seg == NULL) | |
1668 | goto dequeue_delayed; | |
1669 | spin_unlock_irqrestore(&wa->xfer_list_lock, flags2); | |
1670 | if (xfer->seg == NULL) /* still hasn't reached */ | |
1671 | goto out_unlock; /* setup(), enqueue_b() completes */ | |
1672 | /* Ok, the xfer is in flight already, it's been setup and submitted.*/ | |
14e1d2df | 1673 | xfer_abort_pending = __wa_xfer_abort(xfer) >= 0; |
df365423 IPG |
1674 | for (cnt = 0; cnt < xfer->segs; cnt++) { |
1675 | seg = xfer->seg[cnt]; | |
14e1d2df TP |
1676 | pr_debug("%s: xfer id 0x%08X#%d status = %d\n", |
1677 | __func__, wa_xfer_id(xfer), cnt, seg->status); | |
df365423 IPG |
1678 | switch (seg->status) { |
1679 | case WA_SEG_NOTREADY: | |
1680 | case WA_SEG_READY: | |
1681 | printk(KERN_ERR "xfer %p#%u: dequeue bad state %u\n", | |
1682 | xfer, cnt, seg->status); | |
1683 | WARN_ON(1); | |
1684 | break; | |
1685 | case WA_SEG_DELAYED: | |
14e1d2df TP |
1686 | /* |
1687 | * delete from rpipe delayed list. If no segments on | |
1688 | * this xfer have been submitted, __wa_xfer_is_done will | |
1689 | * trigger a giveback below. Otherwise, the submitted | |
1690 | * segments will be completed in the DTI interrupt. | |
1691 | */ | |
df365423 IPG |
1692 | seg->status = WA_SEG_ABORTED; |
1693 | spin_lock_irqsave(&rpipe->seg_lock, flags2); | |
1694 | list_del(&seg->list_node); | |
1695 | xfer->segs_done++; | |
df365423 IPG |
1696 | spin_unlock_irqrestore(&rpipe->seg_lock, flags2); |
1697 | break; | |
df365423 IPG |
1698 | case WA_SEG_DONE: |
1699 | case WA_SEG_ERROR: | |
1700 | case WA_SEG_ABORTED: | |
1701 | break; | |
14e1d2df TP |
1702 | /* |
1703 | * In the states below, the HWA device already knows | |
1704 | * about the transfer. If an abort request was sent, | |
1705 | * allow the HWA to process it and wait for the | |
1706 | * results. Otherwise, the DTI state and seg completed | |
1707 | * counts can get out of sync. | |
1708 | */ | |
1709 | case WA_SEG_SUBMITTED: | |
1710 | case WA_SEG_PENDING: | |
1711 | case WA_SEG_DTI_PENDING: | |
1712 | /* | |
1713 | * Check if the abort was successfully sent. This could | |
1714 | * be false if the HWA has been removed but we haven't | |
1715 | * gotten the disconnect notification yet. | |
1716 | */ | |
1717 | if (!xfer_abort_pending) { | |
1718 | seg->status = WA_SEG_ABORTED; | |
1719 | rpipe_ready = rpipe_avail_inc(rpipe); | |
1720 | xfer->segs_done++; | |
1721 | } | |
1722 | break; | |
df365423 IPG |
1723 | } |
1724 | } | |
1725 | xfer->result = urb->status; /* -ENOENT or -ECONNRESET */ | |
14e1d2df | 1726 | done = __wa_xfer_is_done(xfer); |
df365423 | 1727 | spin_unlock_irqrestore(&xfer->lock, flags); |
14e1d2df TP |
1728 | if (done) |
1729 | wa_xfer_completion(xfer); | |
df365423 IPG |
1730 | if (rpipe_ready) |
1731 | wa_xfer_delayed_run(rpipe); | |
df365423 IPG |
1732 | return 0; |
1733 | ||
1734 | out_unlock: | |
1735 | spin_unlock_irqrestore(&xfer->lock, flags); | |
1736 | out: | |
df365423 IPG |
1737 | return 0; |
1738 | ||
1739 | dequeue_delayed: | |
1740 | list_del_init(&xfer->list_node); | |
1741 | spin_unlock_irqrestore(&wa->xfer_list_lock, flags2); | |
1742 | xfer->result = urb->status; | |
1743 | spin_unlock_irqrestore(&xfer->lock, flags); | |
1744 | wa_xfer_giveback(xfer); | |
1745 | usb_put_urb(urb); /* we got a ref in enqueue() */ | |
df365423 IPG |
1746 | return 0; |
1747 | } | |
1748 | EXPORT_SYMBOL_GPL(wa_urb_dequeue); | |
1749 | ||
1750 | /* | |
1751 | * Translation from WA status codes (WUSB1.0 Table 8.15) to errno | |
1752 | * codes | |
1753 | * | |
1754 | * Positive errno values are internal inconsistencies and should be | |
1755 | * flagged louder. Negative are to be passed up to the user in the | |
1756 | * normal way. | |
1757 | * | |
1758 | * @status: USB WA status code -- high two bits are stripped. | |
1759 | */ | |
1760 | static int wa_xfer_status_to_errno(u8 status) | |
1761 | { | |
1762 | int errno; | |
1763 | u8 real_status = status; | |
1764 | static int xlat[] = { | |
1765 | [WA_XFER_STATUS_SUCCESS] = 0, | |
1766 | [WA_XFER_STATUS_HALTED] = -EPIPE, | |
1767 | [WA_XFER_STATUS_DATA_BUFFER_ERROR] = -ENOBUFS, | |
1768 | [WA_XFER_STATUS_BABBLE] = -EOVERFLOW, | |
1769 | [WA_XFER_RESERVED] = EINVAL, | |
1770 | [WA_XFER_STATUS_NOT_FOUND] = 0, | |
1771 | [WA_XFER_STATUS_INSUFFICIENT_RESOURCE] = -ENOMEM, | |
1772 | [WA_XFER_STATUS_TRANSACTION_ERROR] = -EILSEQ, | |
1773 | [WA_XFER_STATUS_ABORTED] = -EINTR, | |
1774 | [WA_XFER_STATUS_RPIPE_NOT_READY] = EINVAL, | |
1775 | [WA_XFER_INVALID_FORMAT] = EINVAL, | |
1776 | [WA_XFER_UNEXPECTED_SEGMENT_NUMBER] = EINVAL, | |
1777 | [WA_XFER_STATUS_RPIPE_TYPE_MISMATCH] = EINVAL, | |
1778 | }; | |
1779 | status &= 0x3f; | |
1780 | ||
1781 | if (status == 0) | |
1782 | return 0; | |
1783 | if (status >= ARRAY_SIZE(xlat)) { | |
9708cd2f | 1784 | printk_ratelimited(KERN_ERR "%s(): BUG? " |
df365423 IPG |
1785 | "Unknown WA transfer status 0x%02x\n", |
1786 | __func__, real_status); | |
1787 | return -EINVAL; | |
1788 | } | |
1789 | errno = xlat[status]; | |
1790 | if (unlikely(errno > 0)) { | |
9708cd2f | 1791 | printk_ratelimited(KERN_ERR "%s(): BUG? " |
df365423 IPG |
1792 | "Inconsistent WA status: 0x%02x\n", |
1793 | __func__, real_status); | |
1794 | errno = -errno; | |
1795 | } | |
1796 | return errno; | |
1797 | } | |
1798 | ||
14e1d2df TP |
1799 | /* |
1800 | * If a last segment flag and/or a transfer result error is encountered, | |
1801 | * no other segment transfer results will be returned from the device. | |
1802 | * Mark the remaining submitted or pending xfers as completed so that | |
1803 | * the xfer will complete cleanly. | |
1804 | */ | |
1805 | static void wa_complete_remaining_xfer_segs(struct wa_xfer *xfer, | |
1806 | struct wa_seg *incoming_seg) | |
1807 | { | |
1808 | int index; | |
1809 | struct wa_rpipe *rpipe = xfer->ep->hcpriv; | |
1810 | ||
1811 | for (index = incoming_seg->index + 1; index < xfer->segs_submitted; | |
1812 | index++) { | |
1813 | struct wa_seg *current_seg = xfer->seg[index]; | |
1814 | ||
1815 | BUG_ON(current_seg == NULL); | |
1816 | ||
1817 | switch (current_seg->status) { | |
1818 | case WA_SEG_SUBMITTED: | |
1819 | case WA_SEG_PENDING: | |
1820 | case WA_SEG_DTI_PENDING: | |
1821 | rpipe_avail_inc(rpipe); | |
1822 | /* | |
1823 | * do not increment RPIPE avail for the WA_SEG_DELAYED case | |
1824 | * since it has not been submitted to the RPIPE. | |
1825 | */ | |
1826 | case WA_SEG_DELAYED: | |
1827 | xfer->segs_done++; | |
1828 | current_seg->status = incoming_seg->status; | |
1829 | break; | |
1830 | case WA_SEG_ABORTED: | |
1831 | break; | |
1832 | default: | |
1833 | WARN(1, "%s: xfer 0x%08X#%d. bad seg status = %d\n", | |
1834 | __func__, wa_xfer_id(xfer), index, | |
1835 | current_seg->status); | |
1836 | break; | |
1837 | } | |
1838 | } | |
1839 | } | |
1840 | ||
df365423 IPG |
1841 | /* |
1842 | * Process a xfer result completion message | |
1843 | * | |
14e1d2df | 1844 | * inbound transfers: need to schedule a buf_in_urb read |
df365423 | 1845 | * |
6d33f7bb | 1846 | * FIXME: this function needs to be broken up in parts |
df365423 | 1847 | */ |
0367eef2 TP |
1848 | static void wa_xfer_result_chew(struct wahc *wa, struct wa_xfer *xfer, |
1849 | struct wa_xfer_result *xfer_result) | |
df365423 IPG |
1850 | { |
1851 | int result; | |
1852 | struct device *dev = &wa->usb_iface->dev; | |
1853 | unsigned long flags; | |
1854 | u8 seg_idx; | |
1855 | struct wa_seg *seg; | |
1856 | struct wa_rpipe *rpipe; | |
0367eef2 | 1857 | unsigned done = 0; |
df365423 IPG |
1858 | u8 usb_status; |
1859 | unsigned rpipe_ready = 0; | |
1860 | ||
df365423 IPG |
1861 | spin_lock_irqsave(&xfer->lock, flags); |
1862 | seg_idx = xfer_result->bTransferSegment & 0x7f; | |
1863 | if (unlikely(seg_idx >= xfer->segs)) | |
1864 | goto error_bad_seg; | |
1865 | seg = xfer->seg[seg_idx]; | |
1866 | rpipe = xfer->ep->hcpriv; | |
1867 | usb_status = xfer_result->bTransferStatus; | |
b9c84be6 TP |
1868 | dev_dbg(dev, "xfer %p ID 0x%08X#%u: bTransferStatus 0x%02x (seg status %u)\n", |
1869 | xfer, wa_xfer_id(xfer), seg_idx, usb_status, seg->status); | |
df365423 IPG |
1870 | if (seg->status == WA_SEG_ABORTED |
1871 | || seg->status == WA_SEG_ERROR) /* already handled */ | |
1872 | goto segment_aborted; | |
1873 | if (seg->status == WA_SEG_SUBMITTED) /* ops, got here */ | |
1874 | seg->status = WA_SEG_PENDING; /* before wa_seg{_dto}_cb() */ | |
1875 | if (seg->status != WA_SEG_PENDING) { | |
1876 | if (printk_ratelimit()) | |
1877 | dev_err(dev, "xfer %p#%u: Bad segment state %u\n", | |
1878 | xfer, seg_idx, seg->status); | |
1879 | seg->status = WA_SEG_PENDING; /* workaround/"fix" it */ | |
1880 | } | |
1881 | if (usb_status & 0x80) { | |
1882 | seg->result = wa_xfer_status_to_errno(usb_status); | |
2b81c083 TP |
1883 | dev_err(dev, "DTI: xfer %p#:%08X:%u failed (0x%02x)\n", |
1884 | xfer, xfer->id, seg->index, usb_status); | |
14e1d2df TP |
1885 | seg->status = ((usb_status & 0x7F) == WA_XFER_STATUS_ABORTED) ? |
1886 | WA_SEG_ABORTED : WA_SEG_ERROR; | |
df365423 IPG |
1887 | goto error_complete; |
1888 | } | |
1889 | /* FIXME: we ignore warnings, tally them for stats */ | |
1890 | if (usb_status & 0x40) /* Warning?... */ | |
1891 | usb_status = 0; /* ... pass */ | |
7a32d9be TP |
1892 | if (usb_pipeisoc(xfer->urb->pipe)) { |
1893 | /* set up WA state to read the isoc packet status next. */ | |
1894 | wa->dti_isoc_xfer_in_progress = wa_xfer_id(xfer); | |
1895 | wa->dti_isoc_xfer_seg = seg_idx; | |
1896 | wa->dti_state = WA_DTI_ISOC_PACKET_STATUS_PENDING; | |
1897 | } else if (xfer->is_inbound) { /* IN data phase: read to buffer */ | |
df365423 IPG |
1898 | seg->status = WA_SEG_DTI_PENDING; |
1899 | BUG_ON(wa->buf_in_urb->status == -EINPROGRESS); | |
2b81c083 TP |
1900 | /* this should always be 0 before a resubmit. */ |
1901 | wa->buf_in_urb->num_mapped_sgs = 0; | |
1902 | ||
df365423 IPG |
1903 | if (xfer->is_dma) { |
1904 | wa->buf_in_urb->transfer_dma = | |
1905 | xfer->urb->transfer_dma | |
2b81c083 | 1906 | + (seg_idx * xfer->seg_size); |
df365423 IPG |
1907 | wa->buf_in_urb->transfer_flags |
1908 | |= URB_NO_TRANSFER_DMA_MAP; | |
2b81c083 TP |
1909 | wa->buf_in_urb->transfer_buffer = NULL; |
1910 | wa->buf_in_urb->sg = NULL; | |
1911 | wa->buf_in_urb->num_sgs = 0; | |
df365423 | 1912 | } else { |
2b81c083 | 1913 | /* do buffer or SG processing. */ |
df365423 IPG |
1914 | wa->buf_in_urb->transfer_flags |
1915 | &= ~URB_NO_TRANSFER_DMA_MAP; | |
2b81c083 TP |
1916 | |
1917 | if (xfer->urb->transfer_buffer) { | |
1918 | wa->buf_in_urb->transfer_buffer = | |
1919 | xfer->urb->transfer_buffer | |
1920 | + (seg_idx * xfer->seg_size); | |
1921 | wa->buf_in_urb->sg = NULL; | |
1922 | wa->buf_in_urb->num_sgs = 0; | |
1923 | } else { | |
1924 | /* allocate an SG list to store seg_size bytes | |
1925 | and copy the subset of the xfer->urb->sg | |
1926 | that matches the buffer subset we are | |
1927 | about to read. */ | |
1928 | wa->buf_in_urb->sg = wa_xfer_create_subset_sg( | |
1929 | xfer->urb->sg, | |
1930 | seg_idx * xfer->seg_size, | |
1931 | le32_to_cpu( | |
1932 | xfer_result->dwTransferLength), | |
1933 | &(wa->buf_in_urb->num_sgs)); | |
1934 | ||
1935 | if (!(wa->buf_in_urb->sg)) { | |
1936 | wa->buf_in_urb->num_sgs = 0; | |
1937 | goto error_sg_alloc; | |
1938 | } | |
1939 | wa->buf_in_urb->transfer_buffer = NULL; | |
1940 | } | |
df365423 IPG |
1941 | } |
1942 | wa->buf_in_urb->transfer_buffer_length = | |
1943 | le32_to_cpu(xfer_result->dwTransferLength); | |
1944 | wa->buf_in_urb->context = seg; | |
1945 | result = usb_submit_urb(wa->buf_in_urb, GFP_ATOMIC); | |
1946 | if (result < 0) | |
1947 | goto error_submit_buf_in; | |
1948 | } else { | |
1949 | /* OUT data phase, complete it -- */ | |
1950 | seg->status = WA_SEG_DONE; | |
1951 | seg->result = le32_to_cpu(xfer_result->dwTransferLength); | |
1952 | xfer->segs_done++; | |
1953 | rpipe_ready = rpipe_avail_inc(rpipe); | |
1954 | done = __wa_xfer_is_done(xfer); | |
1955 | } | |
1956 | spin_unlock_irqrestore(&xfer->lock, flags); | |
1957 | if (done) | |
1958 | wa_xfer_completion(xfer); | |
1959 | if (rpipe_ready) | |
1960 | wa_xfer_delayed_run(rpipe); | |
df365423 IPG |
1961 | return; |
1962 | ||
df365423 IPG |
1963 | error_submit_buf_in: |
1964 | if (edc_inc(&wa->dti_edc, EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) { | |
1965 | dev_err(dev, "DTI: URB max acceptable errors " | |
1966 | "exceeded, resetting device\n"); | |
1967 | wa_reset_all(wa); | |
1968 | } | |
1969 | if (printk_ratelimit()) | |
1970 | dev_err(dev, "xfer %p#%u: can't submit DTI data phase: %d\n", | |
1971 | xfer, seg_idx, result); | |
1972 | seg->result = result; | |
2b81c083 | 1973 | kfree(wa->buf_in_urb->sg); |
6741448e | 1974 | wa->buf_in_urb->sg = NULL; |
2b81c083 | 1975 | error_sg_alloc: |
6d33f7bb | 1976 | __wa_xfer_abort(xfer); |
df365423 | 1977 | seg->status = WA_SEG_ERROR; |
14e1d2df | 1978 | error_complete: |
df365423 IPG |
1979 | xfer->segs_done++; |
1980 | rpipe_ready = rpipe_avail_inc(rpipe); | |
14e1d2df | 1981 | wa_complete_remaining_xfer_segs(xfer, seg); |
df365423 | 1982 | done = __wa_xfer_is_done(xfer); |
6d33f7bb TP |
1983 | /* |
1984 | * queue work item to clear STALL for control endpoints. | |
1985 | * Otherwise, let endpoint_reset take care of it. | |
1986 | */ | |
1987 | if (((usb_status & 0x3f) == WA_XFER_STATUS_HALTED) && | |
1988 | usb_endpoint_xfer_control(&xfer->ep->desc) && | |
1989 | done) { | |
1990 | ||
1991 | dev_info(dev, "Control EP stall. Queue delayed work.\n"); | |
1992 | spin_lock_irq(&wa->xfer_list_lock); | |
8eb41299 WY |
1993 | /* move xfer from xfer_list to xfer_errored_list. */ |
1994 | list_move_tail(&xfer->list_node, &wa->xfer_errored_list); | |
6d33f7bb TP |
1995 | spin_unlock_irq(&wa->xfer_list_lock); |
1996 | spin_unlock_irqrestore(&xfer->lock, flags); | |
1997 | queue_work(wusbd, &wa->xfer_error_work); | |
1998 | } else { | |
1999 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2000 | if (done) | |
2001 | wa_xfer_completion(xfer); | |
2002 | if (rpipe_ready) | |
2003 | wa_xfer_delayed_run(rpipe); | |
2004 | } | |
2005 | ||
df365423 IPG |
2006 | return; |
2007 | ||
df365423 IPG |
2008 | error_bad_seg: |
2009 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2010 | wa_urb_dequeue(wa, xfer->urb); | |
2011 | if (printk_ratelimit()) | |
2012 | dev_err(dev, "xfer %p#%u: bad segment\n", xfer, seg_idx); | |
2013 | if (edc_inc(&wa->dti_edc, EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) { | |
2014 | dev_err(dev, "DTI: URB max acceptable errors " | |
2015 | "exceeded, resetting device\n"); | |
2016 | wa_reset_all(wa); | |
2017 | } | |
df365423 IPG |
2018 | return; |
2019 | ||
df365423 IPG |
2020 | segment_aborted: |
2021 | /* nothing to do, as the aborter did the completion */ | |
2022 | spin_unlock_irqrestore(&xfer->lock, flags); | |
df365423 IPG |
2023 | } |
2024 | ||
7a32d9be TP |
2025 | /* |
2026 | * Process a isochronous packet status message | |
2027 | * | |
2028 | * inbound transfers: need to schedule a buf_in_urb read | |
2029 | */ | |
2030 | static void wa_process_iso_packet_status(struct wahc *wa, struct urb *urb) | |
2031 | { | |
2032 | struct device *dev = &wa->usb_iface->dev; | |
2033 | struct wa_xfer_packet_status_hwaiso *packet_status; | |
2034 | struct wa_xfer *xfer; | |
2035 | unsigned long flags; | |
2036 | struct wa_seg *seg; | |
2037 | struct wa_rpipe *rpipe; | |
2038 | unsigned done = 0; | |
2039 | unsigned rpipe_ready = 0; | |
2040 | const int expected_size = sizeof(*packet_status) + | |
2041 | sizeof(packet_status->PacketStatus[0]); | |
2042 | ||
2043 | /* We have a xfer result buffer; check it */ | |
2044 | dev_dbg(dev, "DTI: isoc packet status %d bytes at %p\n", | |
2045 | urb->actual_length, urb->transfer_buffer); | |
2046 | if (urb->actual_length != expected_size) { | |
afc3cba5 | 2047 | dev_err(dev, "DTI Error: isoc packet status--bad urb length (%d bytes vs %d needed)\n", |
7a32d9be TP |
2048 | urb->actual_length, expected_size); |
2049 | goto error_parse_buffer; | |
2050 | } | |
2051 | packet_status = (struct wa_xfer_packet_status_hwaiso *)(wa->dti_buf); | |
2052 | if (le16_to_cpu(packet_status->wLength) != expected_size) { | |
2053 | dev_err(dev, "DTI Error: isoc packet status--bad length %u\n", | |
2054 | le16_to_cpu(packet_status->wLength)); | |
2055 | goto error_parse_buffer; | |
2056 | } | |
2057 | if (packet_status->bPacketType != WA_XFER_ISO_PACKET_STATUS) { | |
2058 | dev_err(dev, "DTI Error: isoc packet status--bad type 0x%02x\n", | |
2059 | packet_status->bPacketType); | |
2060 | goto error_parse_buffer; | |
2061 | } | |
2062 | xfer = wa_xfer_get_by_id(wa, wa->dti_isoc_xfer_in_progress); | |
2063 | if (xfer == NULL) { | |
2064 | dev_err(dev, "DTI Error: isoc packet status--unknown xfer 0x%08x\n", | |
2065 | wa->dti_isoc_xfer_in_progress); | |
2066 | goto error_parse_buffer; | |
2067 | } | |
2068 | spin_lock_irqsave(&xfer->lock, flags); | |
2069 | if (unlikely(wa->dti_isoc_xfer_seg >= xfer->segs)) | |
2070 | goto error_bad_seg; | |
2071 | seg = xfer->seg[wa->dti_isoc_xfer_seg]; | |
2072 | rpipe = xfer->ep->hcpriv; | |
2073 | ||
2074 | /* set urb isoc packet status and length. */ | |
2075 | xfer->urb->iso_frame_desc[seg->index].status = | |
2076 | wa_xfer_status_to_errno( | |
2077 | le16_to_cpu(packet_status->PacketStatus[0].PacketStatus)); | |
2078 | xfer->urb->iso_frame_desc[seg->index].actual_length = | |
2079 | le16_to_cpu(packet_status->PacketStatus[0].PacketLength); | |
2080 | ||
2081 | if (!xfer->is_inbound) { | |
2082 | /* OUT transfer, complete it -- */ | |
2083 | seg->status = WA_SEG_DONE; | |
2084 | xfer->segs_done++; | |
2085 | rpipe_ready = rpipe_avail_inc(rpipe); | |
2086 | done = __wa_xfer_is_done(xfer); | |
2087 | } | |
2088 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2089 | wa->dti_state = WA_DTI_TRANSFER_RESULT_PENDING; | |
2090 | if (done) | |
2091 | wa_xfer_completion(xfer); | |
2092 | if (rpipe_ready) | |
2093 | wa_xfer_delayed_run(rpipe); | |
2094 | wa_xfer_put(xfer); | |
2095 | return; | |
2096 | ||
2097 | error_bad_seg: | |
2098 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2099 | wa_xfer_put(xfer); | |
2100 | error_parse_buffer: | |
2101 | return; | |
2102 | } | |
2103 | ||
df365423 IPG |
2104 | /* |
2105 | * Callback for the IN data phase | |
2106 | * | |
af901ca1 | 2107 | * If successful transition state; otherwise, take a note of the |
df365423 IPG |
2108 | * error, mark this segment done and try completion. |
2109 | * | |
2110 | * Note we don't access until we are sure that the transfer hasn't | |
2111 | * been cancelled (ECONNRESET, ENOENT), which could mean that | |
2112 | * seg->xfer could be already gone. | |
2113 | */ | |
2114 | static void wa_buf_in_cb(struct urb *urb) | |
2115 | { | |
2116 | struct wa_seg *seg = urb->context; | |
2117 | struct wa_xfer *xfer = seg->xfer; | |
2118 | struct wahc *wa; | |
2119 | struct device *dev; | |
2120 | struct wa_rpipe *rpipe; | |
2121 | unsigned rpipe_ready; | |
2122 | unsigned long flags; | |
2123 | u8 done = 0; | |
2124 | ||
2b81c083 TP |
2125 | /* free the sg if it was used. */ |
2126 | kfree(urb->sg); | |
2127 | urb->sg = NULL; | |
2128 | ||
df365423 IPG |
2129 | switch (urb->status) { |
2130 | case 0: | |
2131 | spin_lock_irqsave(&xfer->lock, flags); | |
2132 | wa = xfer->wa; | |
2133 | dev = &wa->usb_iface->dev; | |
2134 | rpipe = xfer->ep->hcpriv; | |
bce83697 DV |
2135 | dev_dbg(dev, "xfer %p#%u: data in done (%zu bytes)\n", |
2136 | xfer, seg->index, (size_t)urb->actual_length); | |
df365423 IPG |
2137 | seg->status = WA_SEG_DONE; |
2138 | seg->result = urb->actual_length; | |
2139 | xfer->segs_done++; | |
2140 | rpipe_ready = rpipe_avail_inc(rpipe); | |
2141 | done = __wa_xfer_is_done(xfer); | |
2142 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2143 | if (done) | |
2144 | wa_xfer_completion(xfer); | |
2145 | if (rpipe_ready) | |
2146 | wa_xfer_delayed_run(rpipe); | |
2147 | break; | |
2148 | case -ECONNRESET: /* URB unlinked; no need to do anything */ | |
2149 | case -ENOENT: /* as it was done by the who unlinked us */ | |
2150 | break; | |
2151 | default: /* Other errors ... */ | |
2152 | spin_lock_irqsave(&xfer->lock, flags); | |
2153 | wa = xfer->wa; | |
2154 | dev = &wa->usb_iface->dev; | |
2155 | rpipe = xfer->ep->hcpriv; | |
2156 | if (printk_ratelimit()) | |
2157 | dev_err(dev, "xfer %p#%u: data in error %d\n", | |
2158 | xfer, seg->index, urb->status); | |
2159 | if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS, | |
2160 | EDC_ERROR_TIMEFRAME)){ | |
2161 | dev_err(dev, "DTO: URB max acceptable errors " | |
2162 | "exceeded, resetting device\n"); | |
2163 | wa_reset_all(wa); | |
2164 | } | |
2165 | seg->status = WA_SEG_ERROR; | |
2166 | seg->result = urb->status; | |
2167 | xfer->segs_done++; | |
2168 | rpipe_ready = rpipe_avail_inc(rpipe); | |
2169 | __wa_xfer_abort(xfer); | |
2170 | done = __wa_xfer_is_done(xfer); | |
2171 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2172 | if (done) | |
2173 | wa_xfer_completion(xfer); | |
2174 | if (rpipe_ready) | |
2175 | wa_xfer_delayed_run(rpipe); | |
2176 | } | |
df365423 IPG |
2177 | } |
2178 | ||
2179 | /* | |
2180 | * Handle an incoming transfer result buffer | |
2181 | * | |
2182 | * Given a transfer result buffer, it completes the transfer (possibly | |
2183 | * scheduling and buffer in read) and then resubmits the DTI URB for a | |
2184 | * new transfer result read. | |
2185 | * | |
2186 | * | |
2187 | * The xfer_result DTI URB state machine | |
2188 | * | |
2189 | * States: OFF | RXR (Read-Xfer-Result) | RBI (Read-Buffer-In) | |
2190 | * | |
2191 | * We start in OFF mode, the first xfer_result notification [through | |
2192 | * wa_handle_notif_xfer()] moves us to RXR by posting the DTI-URB to | |
2193 | * read. | |
2194 | * | |
2195 | * We receive a buffer -- if it is not a xfer_result, we complain and | |
2196 | * repost the DTI-URB. If it is a xfer_result then do the xfer seg | |
2197 | * request accounting. If it is an IN segment, we move to RBI and post | |
2198 | * a BUF-IN-URB to the right buffer. The BUF-IN-URB callback will | |
2199 | * repost the DTI-URB and move to RXR state. if there was no IN | |
2200 | * segment, it will repost the DTI-URB. | |
2201 | * | |
2202 | * We go back to OFF when we detect a ENOENT or ESHUTDOWN (or too many | |
2203 | * errors) in the URBs. | |
2204 | */ | |
0367eef2 | 2205 | static void wa_dti_cb(struct urb *urb) |
df365423 IPG |
2206 | { |
2207 | int result; | |
2208 | struct wahc *wa = urb->context; | |
2209 | struct device *dev = &wa->usb_iface->dev; | |
df365423 | 2210 | u32 xfer_id; |
df365423 IPG |
2211 | u8 usb_status; |
2212 | ||
df365423 IPG |
2213 | BUG_ON(wa->dti_urb != urb); |
2214 | switch (wa->dti_urb->status) { | |
2215 | case 0: | |
7a32d9be TP |
2216 | if (wa->dti_state == WA_DTI_TRANSFER_RESULT_PENDING) { |
2217 | struct wa_xfer_result *xfer_result; | |
2218 | struct wa_xfer *xfer; | |
2219 | ||
2220 | /* We have a xfer result buffer; check it */ | |
2221 | dev_dbg(dev, "DTI: xfer result %d bytes at %p\n", | |
2222 | urb->actual_length, urb->transfer_buffer); | |
2223 | if (urb->actual_length != sizeof(*xfer_result)) { | |
2224 | dev_err(dev, "DTI Error: xfer result--bad size xfer result (%d bytes vs %zu needed)\n", | |
2225 | urb->actual_length, | |
2226 | sizeof(*xfer_result)); | |
2227 | break; | |
2228 | } | |
2229 | xfer_result = (struct wa_xfer_result *)(wa->dti_buf); | |
2230 | if (xfer_result->hdr.bLength != sizeof(*xfer_result)) { | |
2231 | dev_err(dev, "DTI Error: xfer result--bad header length %u\n", | |
2232 | xfer_result->hdr.bLength); | |
2233 | break; | |
2234 | } | |
2235 | if (xfer_result->hdr.bNotifyType != WA_XFER_RESULT) { | |
2236 | dev_err(dev, "DTI Error: xfer result--bad header type 0x%02x\n", | |
2237 | xfer_result->hdr.bNotifyType); | |
2238 | break; | |
2239 | } | |
2240 | usb_status = xfer_result->bTransferStatus & 0x3f; | |
2241 | if (usb_status == WA_XFER_STATUS_NOT_FOUND) | |
2242 | /* taken care of already */ | |
2243 | break; | |
2244 | xfer_id = le32_to_cpu(xfer_result->dwTransferID); | |
2245 | xfer = wa_xfer_get_by_id(wa, xfer_id); | |
2246 | if (xfer == NULL) { | |
2247 | /* FIXME: transaction not found. */ | |
2248 | dev_err(dev, "DTI Error: xfer result--unknown xfer 0x%08x (status 0x%02x)\n", | |
2249 | xfer_id, usb_status); | |
2250 | break; | |
2251 | } | |
2252 | wa_xfer_result_chew(wa, xfer, xfer_result); | |
2253 | wa_xfer_put(xfer); | |
2254 | } else if (wa->dti_state == WA_DTI_ISOC_PACKET_STATUS_PENDING) { | |
2255 | wa_process_iso_packet_status(wa, urb); | |
2256 | } else { | |
2257 | dev_err(dev, "DTI Error: unexpected EP state = %d\n", | |
2258 | wa->dti_state); | |
df365423 | 2259 | } |
df365423 IPG |
2260 | break; |
2261 | case -ENOENT: /* (we killed the URB)...so, no broadcast */ | |
2262 | case -ESHUTDOWN: /* going away! */ | |
2263 | dev_dbg(dev, "DTI: going down! %d\n", urb->status); | |
2264 | goto out; | |
2265 | default: | |
2266 | /* Unknown error */ | |
2267 | if (edc_inc(&wa->dti_edc, EDC_MAX_ERRORS, | |
2268 | EDC_ERROR_TIMEFRAME)) { | |
2269 | dev_err(dev, "DTI: URB max acceptable errors " | |
2270 | "exceeded, resetting device\n"); | |
2271 | wa_reset_all(wa); | |
2272 | goto out; | |
2273 | } | |
2274 | if (printk_ratelimit()) | |
2275 | dev_err(dev, "DTI: URB error %d\n", urb->status); | |
2276 | break; | |
2277 | } | |
2278 | /* Resubmit the DTI URB */ | |
2279 | result = usb_submit_urb(wa->dti_urb, GFP_ATOMIC); | |
2280 | if (result < 0) { | |
2281 | dev_err(dev, "DTI Error: Could not submit DTI URB (%d), " | |
2282 | "resetting\n", result); | |
2283 | wa_reset_all(wa); | |
2284 | } | |
2285 | out: | |
df365423 IPG |
2286 | return; |
2287 | } | |
2288 | ||
2289 | /* | |
2290 | * Transfer complete notification | |
2291 | * | |
2292 | * Called from the notif.c code. We get a notification on EP2 saying | |
2293 | * that some endpoint has some transfer result data available. We are | |
2294 | * about to read it. | |
2295 | * | |
2296 | * To speed up things, we always have a URB reading the DTI URB; we | |
2297 | * don't really set it up and start it until the first xfer complete | |
2298 | * notification arrives, which is what we do here. | |
2299 | * | |
0367eef2 | 2300 | * Follow up in wa_dti_cb(), as that's where the whole state |
df365423 IPG |
2301 | * machine starts. |
2302 | * | |
2303 | * So here we just initialize the DTI URB for reading transfer result | |
2304 | * notifications and also the buffer-in URB, for reading buffers. Then | |
2305 | * we just submit the DTI URB. | |
2306 | * | |
2307 | * @wa shall be referenced | |
2308 | */ | |
2309 | void wa_handle_notif_xfer(struct wahc *wa, struct wa_notif_hdr *notif_hdr) | |
2310 | { | |
2311 | int result; | |
2312 | struct device *dev = &wa->usb_iface->dev; | |
2313 | struct wa_notif_xfer *notif_xfer; | |
2314 | const struct usb_endpoint_descriptor *dti_epd = wa->dti_epd; | |
2315 | ||
df365423 IPG |
2316 | notif_xfer = container_of(notif_hdr, struct wa_notif_xfer, hdr); |
2317 | BUG_ON(notif_hdr->bNotifyType != WA_NOTIF_TRANSFER); | |
2318 | ||
2319 | if ((0x80 | notif_xfer->bEndpoint) != dti_epd->bEndpointAddress) { | |
2320 | /* FIXME: hardcoded limitation, adapt */ | |
2321 | dev_err(dev, "BUG: DTI ep is %u, not %u (hack me)\n", | |
2322 | notif_xfer->bEndpoint, dti_epd->bEndpointAddress); | |
2323 | goto error; | |
2324 | } | |
2325 | if (wa->dti_urb != NULL) /* DTI URB already started */ | |
2326 | goto out; | |
2327 | ||
2328 | wa->dti_urb = usb_alloc_urb(0, GFP_KERNEL); | |
2329 | if (wa->dti_urb == NULL) { | |
2330 | dev_err(dev, "Can't allocate DTI URB\n"); | |
2331 | goto error_dti_urb_alloc; | |
2332 | } | |
2333 | usb_fill_bulk_urb( | |
2334 | wa->dti_urb, wa->usb_dev, | |
2335 | usb_rcvbulkpipe(wa->usb_dev, 0x80 | notif_xfer->bEndpoint), | |
0367eef2 TP |
2336 | wa->dti_buf, wa->dti_buf_size, |
2337 | wa_dti_cb, wa); | |
df365423 IPG |
2338 | |
2339 | wa->buf_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
2340 | if (wa->buf_in_urb == NULL) { | |
2341 | dev_err(dev, "Can't allocate BUF-IN URB\n"); | |
2342 | goto error_buf_in_urb_alloc; | |
2343 | } | |
2344 | usb_fill_bulk_urb( | |
2345 | wa->buf_in_urb, wa->usb_dev, | |
2346 | usb_rcvbulkpipe(wa->usb_dev, 0x80 | notif_xfer->bEndpoint), | |
2347 | NULL, 0, wa_buf_in_cb, wa); | |
2348 | result = usb_submit_urb(wa->dti_urb, GFP_KERNEL); | |
2349 | if (result < 0) { | |
2350 | dev_err(dev, "DTI Error: Could not submit DTI URB (%d), " | |
2351 | "resetting\n", result); | |
2352 | goto error_dti_urb_submit; | |
2353 | } | |
2354 | out: | |
df365423 IPG |
2355 | return; |
2356 | ||
2357 | error_dti_urb_submit: | |
2358 | usb_put_urb(wa->buf_in_urb); | |
6741448e | 2359 | wa->buf_in_urb = NULL; |
df365423 IPG |
2360 | error_buf_in_urb_alloc: |
2361 | usb_put_urb(wa->dti_urb); | |
2362 | wa->dti_urb = NULL; | |
2363 | error_dti_urb_alloc: | |
2364 | error: | |
2365 | wa_reset_all(wa); | |
df365423 | 2366 | } |