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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 | */ | |
df365423 | 82 | #include <linux/spinlock.h> |
5a0e3ad6 | 83 | #include <linux/slab.h> |
df365423 | 84 | #include <linux/hash.h> |
9708cd2f | 85 | #include <linux/ratelimit.h> |
f940fcd8 | 86 | #include <linux/export.h> |
2b81c083 | 87 | #include <linux/scatterlist.h> |
bce83697 | 88 | |
df365423 IPG |
89 | #include "wa-hc.h" |
90 | #include "wusbhc.h" | |
91 | ||
df365423 | 92 | enum { |
f74b75e7 TP |
93 | /* [WUSB] section 8.3.3 allocates 7 bits for the segment index. */ |
94 | WA_SEGS_MAX = 128, | |
df365423 IPG |
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 */ | |
2101242c TP |
124 | int isoc_frame_count; /* number of isoc frames in this segment. */ |
125 | int isoc_frame_offset; /* starting frame offset in the xfer URB. */ | |
ea1af42d TP |
126 | /* Isoc frame that the current transfer buffer corresponds to. */ |
127 | int isoc_frame_index; | |
2101242c | 128 | int isoc_size; /* size of all isoc frames sent by this seg. */ |
df365423 IPG |
129 | enum wa_seg_status status; |
130 | ssize_t result; /* bytes xfered or error */ | |
131 | struct wa_xfer_hdr xfer_hdr; | |
df365423 IPG |
132 | }; |
133 | ||
66591015 | 134 | static inline void wa_seg_init(struct wa_seg *seg) |
df365423 | 135 | { |
09d94cbd | 136 | usb_init_urb(&seg->tr_urb); |
66591015 TP |
137 | |
138 | /* set the remaining memory to 0. */ | |
09d94cbd TP |
139 | memset(((void *)seg) + sizeof(seg->tr_urb), 0, |
140 | sizeof(*seg) - sizeof(seg->tr_urb)); | |
df365423 IPG |
141 | } |
142 | ||
143 | /* | |
144 | * Protected by xfer->lock | |
145 | * | |
146 | */ | |
147 | struct wa_xfer { | |
148 | struct kref refcnt; | |
149 | struct list_head list_node; | |
150 | spinlock_t lock; | |
151 | u32 id; | |
152 | ||
153 | struct wahc *wa; /* Wire adapter we are plugged to */ | |
154 | struct usb_host_endpoint *ep; | |
25985edc | 155 | struct urb *urb; /* URB we are transferring for */ |
df365423 IPG |
156 | struct wa_seg **seg; /* transfer segments */ |
157 | u8 segs, segs_submitted, segs_done; | |
158 | unsigned is_inbound:1; | |
159 | unsigned is_dma:1; | |
160 | size_t seg_size; | |
161 | int result; | |
162 | ||
163 | gfp_t gfp; /* allocation mask */ | |
164 | ||
165 | struct wusb_dev *wusb_dev; /* for activity timestamps */ | |
166 | }; | |
167 | ||
2101242c TP |
168 | static void __wa_populate_dto_urb_isoc(struct wa_xfer *xfer, |
169 | struct wa_seg *seg, int curr_iso_frame); | |
acfadcea TP |
170 | static void wa_complete_remaining_xfer_segs(struct wa_xfer *xfer, |
171 | int starting_index, enum wa_seg_status status); | |
2101242c | 172 | |
df365423 IPG |
173 | static inline void wa_xfer_init(struct wa_xfer *xfer) |
174 | { | |
175 | kref_init(&xfer->refcnt); | |
176 | INIT_LIST_HEAD(&xfer->list_node); | |
177 | spin_lock_init(&xfer->lock); | |
178 | } | |
179 | ||
180 | /* | |
25985edc | 181 | * Destroy a transfer structure |
df365423 | 182 | * |
7a32d9be | 183 | * Note that freeing xfer->seg[cnt]->tr_urb will free the containing |
79731cbd | 184 | * xfer->seg[cnt] memory that was allocated by __wa_xfer_setup_segs. |
df365423 IPG |
185 | */ |
186 | static void wa_xfer_destroy(struct kref *_xfer) | |
187 | { | |
188 | struct wa_xfer *xfer = container_of(_xfer, struct wa_xfer, refcnt); | |
189 | if (xfer->seg) { | |
190 | unsigned cnt; | |
191 | for (cnt = 0; cnt < xfer->segs; cnt++) { | |
7a32d9be TP |
192 | struct wa_seg *seg = xfer->seg[cnt]; |
193 | if (seg) { | |
194 | usb_free_urb(seg->isoc_pack_desc_urb); | |
195 | if (seg->dto_urb) { | |
196 | kfree(seg->dto_urb->sg); | |
197 | usb_free_urb(seg->dto_urb); | |
d993670c | 198 | } |
7a32d9be | 199 | usb_free_urb(&seg->tr_urb); |
d993670c | 200 | } |
df365423 | 201 | } |
d993670c | 202 | kfree(xfer->seg); |
df365423 IPG |
203 | } |
204 | kfree(xfer); | |
df365423 IPG |
205 | } |
206 | ||
207 | static void wa_xfer_get(struct wa_xfer *xfer) | |
208 | { | |
209 | kref_get(&xfer->refcnt); | |
210 | } | |
211 | ||
212 | static void wa_xfer_put(struct wa_xfer *xfer) | |
213 | { | |
df365423 | 214 | kref_put(&xfer->refcnt, wa_xfer_destroy); |
df365423 IPG |
215 | } |
216 | ||
679ee475 TP |
217 | /* |
218 | * Try to get exclusive access to the DTO endpoint resource. Return true | |
219 | * if successful. | |
220 | */ | |
221 | static inline int __wa_dto_try_get(struct wahc *wa) | |
222 | { | |
223 | return (test_and_set_bit(0, &wa->dto_in_use) == 0); | |
224 | } | |
225 | ||
226 | /* Release the DTO endpoint resource. */ | |
227 | static inline void __wa_dto_put(struct wahc *wa) | |
228 | { | |
229 | clear_bit_unlock(0, &wa->dto_in_use); | |
230 | } | |
231 | ||
232 | /* Service RPIPEs that are waiting on the DTO resource. */ | |
233 | static void wa_check_for_delayed_rpipes(struct wahc *wa) | |
234 | { | |
235 | unsigned long flags; | |
236 | int dto_waiting = 0; | |
237 | struct wa_rpipe *rpipe; | |
238 | ||
239 | spin_lock_irqsave(&wa->rpipe_lock, flags); | |
240 | while (!list_empty(&wa->rpipe_delayed_list) && !dto_waiting) { | |
241 | rpipe = list_first_entry(&wa->rpipe_delayed_list, | |
242 | struct wa_rpipe, list_node); | |
243 | __wa_xfer_delayed_run(rpipe, &dto_waiting); | |
244 | /* remove this RPIPE from the list if it is not waiting. */ | |
245 | if (!dto_waiting) { | |
246 | pr_debug("%s: RPIPE %d serviced and removed from delayed list.\n", | |
247 | __func__, | |
248 | le16_to_cpu(rpipe->descr.wRPipeIndex)); | |
249 | list_del_init(&rpipe->list_node); | |
250 | } | |
251 | } | |
252 | spin_unlock_irqrestore(&wa->rpipe_lock, flags); | |
253 | } | |
254 | ||
255 | /* add this RPIPE to the end of the delayed RPIPE list. */ | |
256 | static void wa_add_delayed_rpipe(struct wahc *wa, struct wa_rpipe *rpipe) | |
257 | { | |
258 | unsigned long flags; | |
259 | ||
260 | spin_lock_irqsave(&wa->rpipe_lock, flags); | |
261 | /* add rpipe to the list if it is not already on it. */ | |
262 | if (list_empty(&rpipe->list_node)) { | |
263 | pr_debug("%s: adding RPIPE %d to the delayed list.\n", | |
264 | __func__, le16_to_cpu(rpipe->descr.wRPipeIndex)); | |
265 | list_add_tail(&rpipe->list_node, &wa->rpipe_delayed_list); | |
266 | } | |
267 | spin_unlock_irqrestore(&wa->rpipe_lock, flags); | |
268 | } | |
269 | ||
df365423 IPG |
270 | /* |
271 | * xfer is referenced | |
272 | * | |
273 | * xfer->lock has to be unlocked | |
274 | * | |
275 | * We take xfer->lock for setting the result; this is a barrier | |
276 | * against drivers/usb/core/hcd.c:unlink1() being called after we call | |
277 | * usb_hcd_giveback_urb() and wa_urb_dequeue() trying to get a | |
278 | * reference to the transfer. | |
279 | */ | |
280 | static void wa_xfer_giveback(struct wa_xfer *xfer) | |
281 | { | |
282 | unsigned long flags; | |
bce83697 | 283 | |
df365423 IPG |
284 | spin_lock_irqsave(&xfer->wa->xfer_list_lock, flags); |
285 | list_del_init(&xfer->list_node); | |
b374487e | 286 | usb_hcd_unlink_urb_from_ep(&(xfer->wa->wusb->usb_hcd), xfer->urb); |
df365423 IPG |
287 | spin_unlock_irqrestore(&xfer->wa->xfer_list_lock, flags); |
288 | /* FIXME: segmentation broken -- kills DWA */ | |
289 | wusbhc_giveback_urb(xfer->wa->wusb, xfer->urb, xfer->result); | |
290 | wa_put(xfer->wa); | |
291 | wa_xfer_put(xfer); | |
df365423 IPG |
292 | } |
293 | ||
294 | /* | |
295 | * xfer is referenced | |
296 | * | |
297 | * xfer->lock has to be unlocked | |
298 | */ | |
299 | static void wa_xfer_completion(struct wa_xfer *xfer) | |
300 | { | |
df365423 IPG |
301 | if (xfer->wusb_dev) |
302 | wusb_dev_put(xfer->wusb_dev); | |
303 | rpipe_put(xfer->ep->hcpriv); | |
304 | wa_xfer_giveback(xfer); | |
df365423 IPG |
305 | } |
306 | ||
b9c84be6 TP |
307 | /* |
308 | * Initialize a transfer's ID | |
309 | * | |
310 | * We need to use a sequential number; if we use the pointer or the | |
311 | * hash of the pointer, it can repeat over sequential transfers and | |
312 | * then it will confuse the HWA....wonder why in hell they put a 32 | |
313 | * bit handle in there then. | |
314 | */ | |
315 | static void wa_xfer_id_init(struct wa_xfer *xfer) | |
316 | { | |
317 | xfer->id = atomic_add_return(1, &xfer->wa->xfer_id_count); | |
318 | } | |
319 | ||
320 | /* Return the xfer's ID. */ | |
321 | static inline u32 wa_xfer_id(struct wa_xfer *xfer) | |
322 | { | |
323 | return xfer->id; | |
324 | } | |
325 | ||
326 | /* Return the xfer's ID in transport format (little endian). */ | |
327 | static inline __le32 wa_xfer_id_le32(struct wa_xfer *xfer) | |
328 | { | |
329 | return cpu_to_le32(xfer->id); | |
330 | } | |
331 | ||
df365423 IPG |
332 | /* |
333 | * If transfer is done, wrap it up and return true | |
334 | * | |
335 | * xfer->lock has to be locked | |
336 | */ | |
337 | static unsigned __wa_xfer_is_done(struct wa_xfer *xfer) | |
338 | { | |
bce83697 | 339 | struct device *dev = &xfer->wa->usb_iface->dev; |
df365423 IPG |
340 | unsigned result, cnt; |
341 | struct wa_seg *seg; | |
342 | struct urb *urb = xfer->urb; | |
343 | unsigned found_short = 0; | |
344 | ||
df365423 IPG |
345 | result = xfer->segs_done == xfer->segs_submitted; |
346 | if (result == 0) | |
347 | goto out; | |
348 | urb->actual_length = 0; | |
349 | for (cnt = 0; cnt < xfer->segs; cnt++) { | |
350 | seg = xfer->seg[cnt]; | |
351 | switch (seg->status) { | |
352 | case WA_SEG_DONE: | |
353 | if (found_short && seg->result > 0) { | |
b9c84be6 TP |
354 | dev_dbg(dev, "xfer %p ID %08X#%u: bad short segments (%zu)\n", |
355 | xfer, wa_xfer_id(xfer), cnt, | |
356 | seg->result); | |
df365423 IPG |
357 | urb->status = -EINVAL; |
358 | goto out; | |
359 | } | |
360 | urb->actual_length += seg->result; | |
7a32d9be TP |
361 | if (!(usb_pipeisoc(xfer->urb->pipe)) |
362 | && seg->result < xfer->seg_size | |
df365423 IPG |
363 | && cnt != xfer->segs-1) |
364 | found_short = 1; | |
b9c84be6 | 365 | dev_dbg(dev, "xfer %p ID %08X#%u: DONE short %d " |
bce83697 | 366 | "result %zu urb->actual_length %d\n", |
b9c84be6 TP |
367 | xfer, wa_xfer_id(xfer), seg->index, found_short, |
368 | seg->result, urb->actual_length); | |
df365423 IPG |
369 | break; |
370 | case WA_SEG_ERROR: | |
371 | xfer->result = seg->result; | |
cccd3a25 | 372 | dev_dbg(dev, "xfer %p ID %08X#%u: ERROR result %zu(0x%08zX)\n", |
b9c84be6 TP |
373 | xfer, wa_xfer_id(xfer), seg->index, seg->result, |
374 | seg->result); | |
df365423 IPG |
375 | goto out; |
376 | case WA_SEG_ABORTED: | |
bbfc3420 TP |
377 | xfer->result = seg->result; |
378 | dev_dbg(dev, "xfer %p ID %08X#%u: ABORTED result %zu(0x%08zX)\n", | |
379 | xfer, wa_xfer_id(xfer), seg->index, seg->result, | |
380 | seg->result); | |
df365423 IPG |
381 | goto out; |
382 | default: | |
b9c84be6 TP |
383 | dev_warn(dev, "xfer %p ID %08X#%u: is_done bad state %d\n", |
384 | xfer, wa_xfer_id(xfer), cnt, seg->status); | |
df365423 | 385 | xfer->result = -EINVAL; |
df365423 IPG |
386 | goto out; |
387 | } | |
388 | } | |
389 | xfer->result = 0; | |
390 | out: | |
df365423 IPG |
391 | return result; |
392 | } | |
393 | ||
e500d526 TP |
394 | /* |
395 | * Mark the given segment as done. Return true if this completes the xfer. | |
396 | * This should only be called for segs that have been submitted to an RPIPE. | |
397 | * Delayed segs are not marked as submitted so they do not need to be marked | |
398 | * as done when cleaning up. | |
399 | * | |
400 | * xfer->lock has to be locked | |
401 | */ | |
402 | static unsigned __wa_xfer_mark_seg_as_done(struct wa_xfer *xfer, | |
403 | struct wa_seg *seg, enum wa_seg_status status) | |
404 | { | |
405 | seg->status = status; | |
406 | xfer->segs_done++; | |
407 | ||
408 | /* check for done. */ | |
409 | return __wa_xfer_is_done(xfer); | |
410 | } | |
411 | ||
df365423 IPG |
412 | /* |
413 | * Search for a transfer list ID on the HCD's URB list | |
414 | * | |
415 | * For 32 bit architectures, we use the pointer itself; for 64 bits, a | |
416 | * 32-bit hash of the pointer. | |
417 | * | |
418 | * @returns NULL if not found. | |
419 | */ | |
420 | static struct wa_xfer *wa_xfer_get_by_id(struct wahc *wa, u32 id) | |
421 | { | |
422 | unsigned long flags; | |
423 | struct wa_xfer *xfer_itr; | |
424 | spin_lock_irqsave(&wa->xfer_list_lock, flags); | |
425 | list_for_each_entry(xfer_itr, &wa->xfer_list, list_node) { | |
426 | if (id == xfer_itr->id) { | |
427 | wa_xfer_get(xfer_itr); | |
428 | goto out; | |
429 | } | |
430 | } | |
431 | xfer_itr = NULL; | |
432 | out: | |
433 | spin_unlock_irqrestore(&wa->xfer_list_lock, flags); | |
434 | return xfer_itr; | |
435 | } | |
436 | ||
437 | struct wa_xfer_abort_buffer { | |
438 | struct urb urb; | |
acfadcea | 439 | struct wahc *wa; |
df365423 IPG |
440 | struct wa_xfer_abort cmd; |
441 | }; | |
442 | ||
443 | static void __wa_xfer_abort_cb(struct urb *urb) | |
444 | { | |
445 | struct wa_xfer_abort_buffer *b = urb->context; | |
acfadcea TP |
446 | struct wahc *wa = b->wa; |
447 | ||
448 | /* | |
449 | * If the abort request URB failed, then the HWA did not get the abort | |
450 | * command. Forcibly clean up the xfer without waiting for a Transfer | |
451 | * Result from the HWA. | |
452 | */ | |
453 | if (urb->status < 0) { | |
454 | struct wa_xfer *xfer; | |
455 | struct device *dev = &wa->usb_iface->dev; | |
456 | ||
457 | xfer = wa_xfer_get_by_id(wa, le32_to_cpu(b->cmd.dwTransferID)); | |
458 | dev_err(dev, "%s: Transfer Abort request failed. result: %d\n", | |
459 | __func__, urb->status); | |
460 | if (xfer) { | |
461 | unsigned long flags; | |
462 | int done; | |
463 | struct wa_rpipe *rpipe = xfer->ep->hcpriv; | |
464 | ||
465 | dev_err(dev, "%s: cleaning up xfer %p ID 0x%08X.\n", | |
466 | __func__, xfer, wa_xfer_id(xfer)); | |
467 | spin_lock_irqsave(&xfer->lock, flags); | |
468 | /* mark all segs as aborted. */ | |
469 | wa_complete_remaining_xfer_segs(xfer, 0, | |
470 | WA_SEG_ABORTED); | |
471 | done = __wa_xfer_is_done(xfer); | |
472 | spin_unlock_irqrestore(&xfer->lock, flags); | |
473 | if (done) | |
474 | wa_xfer_completion(xfer); | |
475 | wa_xfer_delayed_run(rpipe); | |
476 | wa_xfer_put(xfer); | |
477 | } else { | |
478 | dev_err(dev, "%s: xfer ID 0x%08X already gone.\n", | |
479 | __func__, le32_to_cpu(b->cmd.dwTransferID)); | |
480 | } | |
481 | } | |
482 | ||
483 | wa_put(wa); /* taken in __wa_xfer_abort */ | |
df365423 IPG |
484 | usb_put_urb(&b->urb); |
485 | } | |
486 | ||
487 | /* | |
488 | * Aborts an ongoing transaction | |
489 | * | |
490 | * Assumes the transfer is referenced and locked and in a submitted | |
491 | * state (mainly that there is an endpoint/rpipe assigned). | |
492 | * | |
493 | * The callback (see above) does nothing but freeing up the data by | |
494 | * putting the URB. Because the URB is allocated at the head of the | |
14e1d2df | 495 | * struct, the whole space we allocated is kfreed. * |
df365423 | 496 | */ |
14e1d2df | 497 | static int __wa_xfer_abort(struct wa_xfer *xfer) |
df365423 | 498 | { |
14e1d2df | 499 | int result = -ENOMEM; |
df365423 IPG |
500 | struct device *dev = &xfer->wa->usb_iface->dev; |
501 | struct wa_xfer_abort_buffer *b; | |
502 | struct wa_rpipe *rpipe = xfer->ep->hcpriv; | |
503 | ||
504 | b = kmalloc(sizeof(*b), GFP_ATOMIC); | |
505 | if (b == NULL) | |
506 | goto error_kmalloc; | |
507 | b->cmd.bLength = sizeof(b->cmd); | |
508 | b->cmd.bRequestType = WA_XFER_ABORT; | |
509 | b->cmd.wRPipe = rpipe->descr.wRPipeIndex; | |
fdd160c3 | 510 | b->cmd.dwTransferID = wa_xfer_id_le32(xfer); |
acfadcea | 511 | b->wa = wa_get(xfer->wa); |
df365423 IPG |
512 | |
513 | usb_init_urb(&b->urb); | |
514 | usb_fill_bulk_urb(&b->urb, xfer->wa->usb_dev, | |
515 | usb_sndbulkpipe(xfer->wa->usb_dev, | |
516 | xfer->wa->dto_epd->bEndpointAddress), | |
517 | &b->cmd, sizeof(b->cmd), __wa_xfer_abort_cb, b); | |
518 | result = usb_submit_urb(&b->urb, GFP_ATOMIC); | |
519 | if (result < 0) | |
520 | goto error_submit; | |
14e1d2df | 521 | return result; /* callback frees! */ |
df365423 IPG |
522 | |
523 | ||
524 | error_submit: | |
acfadcea | 525 | wa_put(xfer->wa); |
df365423 IPG |
526 | if (printk_ratelimit()) |
527 | dev_err(dev, "xfer %p: Can't submit abort request: %d\n", | |
528 | xfer, result); | |
529 | kfree(b); | |
530 | error_kmalloc: | |
14e1d2df | 531 | return result; |
df365423 IPG |
532 | |
533 | } | |
534 | ||
2101242c TP |
535 | /* |
536 | * Calculate the number of isoc frames starting from isoc_frame_offset | |
537 | * that will fit a in transfer segment. | |
538 | */ | |
539 | static int __wa_seg_calculate_isoc_frame_count(struct wa_xfer *xfer, | |
540 | int isoc_frame_offset, int *total_size) | |
541 | { | |
542 | int segment_size = 0, frame_count = 0; | |
543 | int index = isoc_frame_offset; | |
f07ddb9e TP |
544 | struct usb_iso_packet_descriptor *iso_frame_desc = |
545 | xfer->urb->iso_frame_desc; | |
2101242c TP |
546 | |
547 | while ((index < xfer->urb->number_of_packets) | |
f07ddb9e | 548 | && ((segment_size + iso_frame_desc[index].length) |
2101242c | 549 | <= xfer->seg_size)) { |
f07ddb9e | 550 | /* |
226b3a2e TP |
551 | * For Alereon HWA devices, only include an isoc frame in an |
552 | * out segment if it is physically contiguous with the previous | |
f07ddb9e TP |
553 | * frame. This is required because those devices expect |
554 | * the isoc frames to be sent as a single USB transaction as | |
555 | * opposed to one transaction per frame with standard HWA. | |
556 | */ | |
557 | if ((xfer->wa->quirks & WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC) | |
226b3a2e | 558 | && (xfer->is_inbound == 0) |
f07ddb9e TP |
559 | && (index > isoc_frame_offset) |
560 | && ((iso_frame_desc[index - 1].offset + | |
561 | iso_frame_desc[index - 1].length) != | |
562 | iso_frame_desc[index].offset)) | |
563 | break; | |
564 | ||
2101242c TP |
565 | /* this frame fits. count it. */ |
566 | ++frame_count; | |
f07ddb9e | 567 | segment_size += iso_frame_desc[index].length; |
2101242c TP |
568 | |
569 | /* move to the next isoc frame. */ | |
570 | ++index; | |
571 | } | |
572 | ||
573 | *total_size = segment_size; | |
574 | return frame_count; | |
575 | } | |
576 | ||
df365423 IPG |
577 | /* |
578 | * | |
579 | * @returns < 0 on error, transfer segment request size if ok | |
580 | */ | |
581 | static ssize_t __wa_xfer_setup_sizes(struct wa_xfer *xfer, | |
582 | enum wa_xfer_type *pxfer_type) | |
583 | { | |
584 | ssize_t result; | |
585 | struct device *dev = &xfer->wa->usb_iface->dev; | |
586 | size_t maxpktsize; | |
587 | struct urb *urb = xfer->urb; | |
588 | struct wa_rpipe *rpipe = xfer->ep->hcpriv; | |
589 | ||
df365423 IPG |
590 | switch (rpipe->descr.bmAttribute & 0x3) { |
591 | case USB_ENDPOINT_XFER_CONTROL: | |
592 | *pxfer_type = WA_XFER_TYPE_CTL; | |
593 | result = sizeof(struct wa_xfer_ctl); | |
594 | break; | |
595 | case USB_ENDPOINT_XFER_INT: | |
596 | case USB_ENDPOINT_XFER_BULK: | |
597 | *pxfer_type = WA_XFER_TYPE_BI; | |
598 | result = sizeof(struct wa_xfer_bi); | |
599 | break; | |
600 | case USB_ENDPOINT_XFER_ISOC: | |
226b3a2e TP |
601 | *pxfer_type = WA_XFER_TYPE_ISO; |
602 | result = sizeof(struct wa_xfer_hwaiso); | |
7a32d9be | 603 | break; |
df365423 IPG |
604 | default: |
605 | /* never happens */ | |
606 | BUG(); | |
607 | result = -EINVAL; /* shut gcc up */ | |
7a32d9be | 608 | } |
df365423 IPG |
609 | xfer->is_inbound = urb->pipe & USB_DIR_IN ? 1 : 0; |
610 | xfer->is_dma = urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP ? 1 : 0; | |
7a32d9be | 611 | |
df365423 | 612 | maxpktsize = le16_to_cpu(rpipe->descr.wMaxPacketSize); |
226b3a2e TP |
613 | xfer->seg_size = le16_to_cpu(rpipe->descr.wBlocks) |
614 | * 1 << (xfer->wa->wa_descr->bRPipeBlockSize - 1); | |
615 | /* Compute the segment size and make sure it is a multiple of | |
616 | * the maxpktsize (WUSB1.0[8.3.3.1])...not really too much of | |
617 | * a check (FIXME) */ | |
618 | if (xfer->seg_size < maxpktsize) { | |
619 | dev_err(dev, | |
620 | "HW BUG? seg_size %zu smaller than maxpktsize %zu\n", | |
621 | xfer->seg_size, maxpktsize); | |
622 | result = -EINVAL; | |
623 | goto error; | |
624 | } | |
625 | xfer->seg_size = (xfer->seg_size / maxpktsize) * maxpktsize; | |
7a32d9be | 626 | if ((rpipe->descr.bmAttribute & 0x3) == USB_ENDPOINT_XFER_ISOC) { |
2101242c TP |
627 | int index = 0; |
628 | ||
2101242c TP |
629 | xfer->segs = 0; |
630 | /* | |
631 | * loop over urb->number_of_packets to determine how many | |
632 | * xfer segments will be needed to send the isoc frames. | |
633 | */ | |
634 | while (index < urb->number_of_packets) { | |
635 | int seg_size; /* don't care. */ | |
636 | index += __wa_seg_calculate_isoc_frame_count(xfer, | |
637 | index, &seg_size); | |
638 | ++xfer->segs; | |
639 | } | |
7a32d9be | 640 | } else { |
7a32d9be TP |
641 | xfer->segs = DIV_ROUND_UP(urb->transfer_buffer_length, |
642 | xfer->seg_size); | |
7a32d9be TP |
643 | if (xfer->segs == 0 && *pxfer_type == WA_XFER_TYPE_CTL) |
644 | xfer->segs = 1; | |
df365423 | 645 | } |
2101242c | 646 | |
f74b75e7 | 647 | if (xfer->segs > WA_SEGS_MAX) { |
2101242c TP |
648 | dev_err(dev, "BUG? oops, number of segments %zu bigger than %d\n", |
649 | (urb->transfer_buffer_length/xfer->seg_size), | |
650 | WA_SEGS_MAX); | |
651 | result = -EINVAL; | |
652 | goto error; | |
653 | } | |
df365423 | 654 | error: |
df365423 IPG |
655 | return result; |
656 | } | |
657 | ||
2101242c TP |
658 | static void __wa_setup_isoc_packet_descr( |
659 | struct wa_xfer_packet_info_hwaiso *packet_desc, | |
660 | struct wa_xfer *xfer, | |
661 | struct wa_seg *seg) { | |
662 | struct usb_iso_packet_descriptor *iso_frame_desc = | |
663 | xfer->urb->iso_frame_desc; | |
664 | int frame_index; | |
665 | ||
666 | /* populate isoc packet descriptor. */ | |
667 | packet_desc->bPacketType = WA_XFER_ISO_PACKET_INFO; | |
668 | packet_desc->wLength = cpu_to_le16(sizeof(*packet_desc) + | |
669 | (sizeof(packet_desc->PacketLength[0]) * | |
670 | seg->isoc_frame_count)); | |
671 | for (frame_index = 0; frame_index < seg->isoc_frame_count; | |
672 | ++frame_index) { | |
673 | int offset_index = frame_index + seg->isoc_frame_offset; | |
674 | packet_desc->PacketLength[frame_index] = | |
675 | cpu_to_le16(iso_frame_desc[offset_index].length); | |
676 | } | |
677 | } | |
678 | ||
679 | ||
bce83697 | 680 | /* Fill in the common request header and xfer-type specific data. */ |
df365423 IPG |
681 | static void __wa_xfer_setup_hdr0(struct wa_xfer *xfer, |
682 | struct wa_xfer_hdr *xfer_hdr0, | |
683 | enum wa_xfer_type xfer_type, | |
684 | size_t xfer_hdr_size) | |
685 | { | |
686 | struct wa_rpipe *rpipe = xfer->ep->hcpriv; | |
2101242c | 687 | struct wa_seg *seg = xfer->seg[0]; |
df365423 | 688 | |
2101242c | 689 | xfer_hdr0 = &seg->xfer_hdr; |
df365423 IPG |
690 | xfer_hdr0->bLength = xfer_hdr_size; |
691 | xfer_hdr0->bRequestType = xfer_type; | |
692 | xfer_hdr0->wRPipe = rpipe->descr.wRPipeIndex; | |
fdd160c3 | 693 | xfer_hdr0->dwTransferID = wa_xfer_id_le32(xfer); |
df365423 IPG |
694 | xfer_hdr0->bTransferSegment = 0; |
695 | switch (xfer_type) { | |
696 | case WA_XFER_TYPE_CTL: { | |
697 | struct wa_xfer_ctl *xfer_ctl = | |
698 | container_of(xfer_hdr0, struct wa_xfer_ctl, hdr); | |
699 | xfer_ctl->bmAttribute = xfer->is_inbound ? 1 : 0; | |
df365423 IPG |
700 | memcpy(&xfer_ctl->baSetupData, xfer->urb->setup_packet, |
701 | sizeof(xfer_ctl->baSetupData)); | |
702 | break; | |
703 | } | |
704 | case WA_XFER_TYPE_BI: | |
705 | break; | |
7a32d9be TP |
706 | case WA_XFER_TYPE_ISO: { |
707 | struct wa_xfer_hwaiso *xfer_iso = | |
708 | container_of(xfer_hdr0, struct wa_xfer_hwaiso, hdr); | |
709 | struct wa_xfer_packet_info_hwaiso *packet_desc = | |
710 | ((void *)xfer_iso) + xfer_hdr_size; | |
2101242c | 711 | |
7a32d9be | 712 | /* populate the isoc section of the transfer request. */ |
2101242c TP |
713 | xfer_iso->dwNumOfPackets = cpu_to_le32(seg->isoc_frame_count); |
714 | /* populate isoc packet descriptor. */ | |
715 | __wa_setup_isoc_packet_descr(packet_desc, xfer, seg); | |
7a32d9be TP |
716 | break; |
717 | } | |
df365423 IPG |
718 | default: |
719 | BUG(); | |
720 | }; | |
721 | } | |
722 | ||
723 | /* | |
724 | * Callback for the OUT data phase of the segment request | |
725 | * | |
09d94cbd | 726 | * Check wa_seg_tr_cb(); most comments also apply here because this |
df365423 IPG |
727 | * function does almost the same thing and they work closely |
728 | * together. | |
729 | * | |
25985edc | 730 | * If the seg request has failed but this DTO phase has succeeded, |
09d94cbd | 731 | * wa_seg_tr_cb() has already failed the segment and moved the |
df365423 IPG |
732 | * status to WA_SEG_ERROR, so this will go through 'case 0' and |
733 | * effectively do nothing. | |
734 | */ | |
735 | static void wa_seg_dto_cb(struct urb *urb) | |
736 | { | |
737 | struct wa_seg *seg = urb->context; | |
738 | struct wa_xfer *xfer = seg->xfer; | |
739 | struct wahc *wa; | |
740 | struct device *dev; | |
741 | struct wa_rpipe *rpipe; | |
742 | unsigned long flags; | |
743 | unsigned rpipe_ready = 0; | |
2101242c | 744 | int data_send_done = 1, release_dto = 0, holding_dto = 0; |
df365423 | 745 | u8 done = 0; |
2101242c | 746 | int result; |
df365423 | 747 | |
d5b5c9f2 TP |
748 | /* free the sg if it was used. */ |
749 | kfree(urb->sg); | |
750 | urb->sg = NULL; | |
751 | ||
2101242c TP |
752 | spin_lock_irqsave(&xfer->lock, flags); |
753 | wa = xfer->wa; | |
754 | dev = &wa->usb_iface->dev; | |
755 | if (usb_pipeisoc(xfer->urb->pipe)) { | |
f07ddb9e TP |
756 | /* Alereon HWA sends all isoc frames in a single transfer. */ |
757 | if (wa->quirks & WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC) | |
ea1af42d | 758 | seg->isoc_frame_index += seg->isoc_frame_count; |
f07ddb9e | 759 | else |
ea1af42d TP |
760 | seg->isoc_frame_index += 1; |
761 | if (seg->isoc_frame_index < seg->isoc_frame_count) { | |
2101242c TP |
762 | data_send_done = 0; |
763 | holding_dto = 1; /* checked in error cases. */ | |
764 | /* | |
765 | * if this is the last isoc frame of the segment, we | |
766 | * can release DTO after sending this frame. | |
767 | */ | |
ea1af42d | 768 | if ((seg->isoc_frame_index + 1) >= |
2101242c TP |
769 | seg->isoc_frame_count) |
770 | release_dto = 1; | |
771 | } | |
772 | dev_dbg(dev, "xfer 0x%08X#%u: isoc frame = %d, holding_dto = %d, release_dto = %d.\n", | |
ea1af42d TP |
773 | wa_xfer_id(xfer), seg->index, seg->isoc_frame_index, |
774 | holding_dto, release_dto); | |
2101242c TP |
775 | } |
776 | spin_unlock_irqrestore(&xfer->lock, flags); | |
777 | ||
df365423 IPG |
778 | switch (urb->status) { |
779 | case 0: | |
780 | spin_lock_irqsave(&xfer->lock, flags); | |
2101242c TP |
781 | seg->result += urb->actual_length; |
782 | if (data_send_done) { | |
783 | dev_dbg(dev, "xfer 0x%08X#%u: data out done (%zu bytes)\n", | |
784 | wa_xfer_id(xfer), seg->index, seg->result); | |
785 | if (seg->status < WA_SEG_PENDING) | |
786 | seg->status = WA_SEG_PENDING; | |
787 | } else { | |
788 | /* should only hit this for isoc xfers. */ | |
789 | /* | |
790 | * Populate the dto URB with the next isoc frame buffer, | |
791 | * send the URB and release DTO if we no longer need it. | |
792 | */ | |
793 | __wa_populate_dto_urb_isoc(xfer, seg, | |
ea1af42d | 794 | seg->isoc_frame_offset + seg->isoc_frame_index); |
2101242c TP |
795 | |
796 | /* resubmit the URB with the next isoc frame. */ | |
618836cc TP |
797 | /* take a ref on resubmit. */ |
798 | wa_xfer_get(xfer); | |
2101242c TP |
799 | result = usb_submit_urb(seg->dto_urb, GFP_ATOMIC); |
800 | if (result < 0) { | |
801 | dev_err(dev, "xfer 0x%08X#%u: DTO submit failed: %d\n", | |
802 | wa_xfer_id(xfer), seg->index, result); | |
803 | spin_unlock_irqrestore(&xfer->lock, flags); | |
804 | goto error_dto_submit; | |
805 | } | |
806 | } | |
df365423 | 807 | spin_unlock_irqrestore(&xfer->lock, flags); |
2101242c TP |
808 | if (release_dto) { |
809 | __wa_dto_put(wa); | |
810 | wa_check_for_delayed_rpipes(wa); | |
811 | } | |
df365423 IPG |
812 | break; |
813 | case -ECONNRESET: /* URB unlinked; no need to do anything */ | |
814 | case -ENOENT: /* as it was done by the who unlinked us */ | |
2101242c TP |
815 | if (holding_dto) { |
816 | __wa_dto_put(wa); | |
817 | wa_check_for_delayed_rpipes(wa); | |
818 | } | |
df365423 IPG |
819 | break; |
820 | default: /* Other errors ... */ | |
2101242c TP |
821 | dev_err(dev, "xfer 0x%08X#%u: data out error %d\n", |
822 | wa_xfer_id(xfer), seg->index, urb->status); | |
823 | goto error_default; | |
824 | } | |
825 | ||
618836cc TP |
826 | /* taken when this URB was submitted. */ |
827 | wa_xfer_put(xfer); | |
2101242c TP |
828 | return; |
829 | ||
830 | error_dto_submit: | |
618836cc TP |
831 | /* taken on resubmit attempt. */ |
832 | wa_xfer_put(xfer); | |
2101242c TP |
833 | error_default: |
834 | spin_lock_irqsave(&xfer->lock, flags); | |
835 | rpipe = xfer->ep->hcpriv; | |
836 | if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS, | |
837 | EDC_ERROR_TIMEFRAME)){ | |
838 | dev_err(dev, "DTO: URB max acceptable errors exceeded, resetting device\n"); | |
839 | wa_reset_all(wa); | |
840 | } | |
841 | if (seg->status != WA_SEG_ERROR) { | |
2101242c | 842 | seg->result = urb->status; |
2101242c TP |
843 | __wa_xfer_abort(xfer); |
844 | rpipe_ready = rpipe_avail_inc(rpipe); | |
e500d526 | 845 | done = __wa_xfer_mark_seg_as_done(xfer, seg, WA_SEG_ERROR); |
df365423 | 846 | } |
2101242c TP |
847 | spin_unlock_irqrestore(&xfer->lock, flags); |
848 | if (holding_dto) { | |
849 | __wa_dto_put(wa); | |
850 | wa_check_for_delayed_rpipes(wa); | |
851 | } | |
852 | if (done) | |
853 | wa_xfer_completion(xfer); | |
854 | if (rpipe_ready) | |
855 | wa_xfer_delayed_run(rpipe); | |
618836cc TP |
856 | /* taken when this URB was submitted. */ |
857 | wa_xfer_put(xfer); | |
df365423 IPG |
858 | } |
859 | ||
7a32d9be TP |
860 | /* |
861 | * Callback for the isoc packet descriptor phase of the segment request | |
862 | * | |
863 | * Check wa_seg_tr_cb(); most comments also apply here because this | |
864 | * function does almost the same thing and they work closely | |
865 | * together. | |
866 | * | |
867 | * If the seg request has failed but this phase has succeeded, | |
868 | * wa_seg_tr_cb() has already failed the segment and moved the | |
869 | * status to WA_SEG_ERROR, so this will go through 'case 0' and | |
870 | * effectively do nothing. | |
871 | */ | |
872 | static void wa_seg_iso_pack_desc_cb(struct urb *urb) | |
873 | { | |
874 | struct wa_seg *seg = urb->context; | |
875 | struct wa_xfer *xfer = seg->xfer; | |
876 | struct wahc *wa; | |
877 | struct device *dev; | |
878 | struct wa_rpipe *rpipe; | |
879 | unsigned long flags; | |
880 | unsigned rpipe_ready = 0; | |
881 | u8 done = 0; | |
882 | ||
883 | switch (urb->status) { | |
884 | case 0: | |
885 | spin_lock_irqsave(&xfer->lock, flags); | |
886 | wa = xfer->wa; | |
887 | dev = &wa->usb_iface->dev; | |
2101242c TP |
888 | dev_dbg(dev, "iso xfer %08X#%u: packet descriptor done\n", |
889 | wa_xfer_id(xfer), seg->index); | |
7a32d9be TP |
890 | if (xfer->is_inbound && seg->status < WA_SEG_PENDING) |
891 | seg->status = WA_SEG_PENDING; | |
892 | spin_unlock_irqrestore(&xfer->lock, flags); | |
893 | break; | |
894 | case -ECONNRESET: /* URB unlinked; no need to do anything */ | |
895 | case -ENOENT: /* as it was done by the who unlinked us */ | |
896 | break; | |
897 | default: /* Other errors ... */ | |
898 | spin_lock_irqsave(&xfer->lock, flags); | |
899 | wa = xfer->wa; | |
900 | dev = &wa->usb_iface->dev; | |
901 | rpipe = xfer->ep->hcpriv; | |
2101242c TP |
902 | pr_err_ratelimited("iso xfer %08X#%u: packet descriptor error %d\n", |
903 | wa_xfer_id(xfer), seg->index, urb->status); | |
7a32d9be TP |
904 | if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS, |
905 | EDC_ERROR_TIMEFRAME)){ | |
226b3a2e | 906 | dev_err(dev, "iso xfer: URB max acceptable errors exceeded, resetting device\n"); |
7a32d9be TP |
907 | wa_reset_all(wa); |
908 | } | |
909 | if (seg->status != WA_SEG_ERROR) { | |
910 | usb_unlink_urb(seg->dto_urb); | |
7a32d9be | 911 | seg->result = urb->status; |
7a32d9be TP |
912 | __wa_xfer_abort(xfer); |
913 | rpipe_ready = rpipe_avail_inc(rpipe); | |
e500d526 TP |
914 | done = __wa_xfer_mark_seg_as_done(xfer, seg, |
915 | WA_SEG_ERROR); | |
7a32d9be TP |
916 | } |
917 | spin_unlock_irqrestore(&xfer->lock, flags); | |
918 | if (done) | |
919 | wa_xfer_completion(xfer); | |
920 | if (rpipe_ready) | |
921 | wa_xfer_delayed_run(rpipe); | |
922 | } | |
618836cc TP |
923 | /* taken when this URB was submitted. */ |
924 | wa_xfer_put(xfer); | |
7a32d9be TP |
925 | } |
926 | ||
df365423 IPG |
927 | /* |
928 | * Callback for the segment request | |
929 | * | |
af901ca1 | 930 | * If successful transition state (unless already transitioned or |
df365423 IPG |
931 | * outbound transfer); otherwise, take a note of the error, mark this |
932 | * segment done and try completion. | |
933 | * | |
934 | * Note we don't access until we are sure that the transfer hasn't | |
935 | * been cancelled (ECONNRESET, ENOENT), which could mean that | |
936 | * seg->xfer could be already gone. | |
937 | * | |
938 | * We have to check before setting the status to WA_SEG_PENDING | |
939 | * because sometimes the xfer result callback arrives before this | |
940 | * callback (geeeeeeze), so it might happen that we are already in | |
7a32d9be | 941 | * another state. As well, we don't set it if the transfer is not inbound, |
df365423 IPG |
942 | * as in that case, wa_seg_dto_cb will do it when the OUT data phase |
943 | * finishes. | |
944 | */ | |
09d94cbd | 945 | static void wa_seg_tr_cb(struct urb *urb) |
df365423 IPG |
946 | { |
947 | struct wa_seg *seg = urb->context; | |
948 | struct wa_xfer *xfer = seg->xfer; | |
949 | struct wahc *wa; | |
950 | struct device *dev; | |
951 | struct wa_rpipe *rpipe; | |
952 | unsigned long flags; | |
953 | unsigned rpipe_ready; | |
954 | u8 done = 0; | |
955 | ||
df365423 IPG |
956 | switch (urb->status) { |
957 | case 0: | |
958 | spin_lock_irqsave(&xfer->lock, flags); | |
959 | wa = xfer->wa; | |
960 | dev = &wa->usb_iface->dev; | |
7a32d9be TP |
961 | dev_dbg(dev, "xfer %p ID 0x%08X#%u: request done\n", |
962 | xfer, wa_xfer_id(xfer), seg->index); | |
963 | if (xfer->is_inbound && | |
964 | seg->status < WA_SEG_PENDING && | |
965 | !(usb_pipeisoc(xfer->urb->pipe))) | |
df365423 IPG |
966 | seg->status = WA_SEG_PENDING; |
967 | spin_unlock_irqrestore(&xfer->lock, flags); | |
968 | break; | |
969 | case -ECONNRESET: /* URB unlinked; no need to do anything */ | |
970 | case -ENOENT: /* as it was done by the who unlinked us */ | |
971 | break; | |
972 | default: /* Other errors ... */ | |
973 | spin_lock_irqsave(&xfer->lock, flags); | |
974 | wa = xfer->wa; | |
975 | dev = &wa->usb_iface->dev; | |
976 | rpipe = xfer->ep->hcpriv; | |
977 | if (printk_ratelimit()) | |
b9c84be6 TP |
978 | dev_err(dev, "xfer %p ID 0x%08X#%u: request error %d\n", |
979 | xfer, wa_xfer_id(xfer), seg->index, | |
980 | urb->status); | |
df365423 IPG |
981 | if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS, |
982 | EDC_ERROR_TIMEFRAME)){ | |
983 | dev_err(dev, "DTO: URB max acceptable errors " | |
984 | "exceeded, resetting device\n"); | |
985 | wa_reset_all(wa); | |
986 | } | |
7a32d9be | 987 | usb_unlink_urb(seg->isoc_pack_desc_urb); |
df365423 | 988 | usb_unlink_urb(seg->dto_urb); |
df365423 | 989 | seg->result = urb->status; |
df365423 IPG |
990 | __wa_xfer_abort(xfer); |
991 | rpipe_ready = rpipe_avail_inc(rpipe); | |
e500d526 | 992 | done = __wa_xfer_mark_seg_as_done(xfer, seg, WA_SEG_ERROR); |
df365423 IPG |
993 | spin_unlock_irqrestore(&xfer->lock, flags); |
994 | if (done) | |
995 | wa_xfer_completion(xfer); | |
996 | if (rpipe_ready) | |
997 | wa_xfer_delayed_run(rpipe); | |
998 | } | |
618836cc TP |
999 | /* taken when this URB was submitted. */ |
1000 | wa_xfer_put(xfer); | |
df365423 IPG |
1001 | } |
1002 | ||
ffd6d17d TP |
1003 | /* |
1004 | * Allocate an SG list to store bytes_to_transfer bytes and copy the | |
2b81c083 | 1005 | * subset of the in_sg that matches the buffer subset |
ffd6d17d TP |
1006 | * we are about to transfer. |
1007 | */ | |
2b81c083 TP |
1008 | static struct scatterlist *wa_xfer_create_subset_sg(struct scatterlist *in_sg, |
1009 | const unsigned int bytes_transferred, | |
1010 | const unsigned int bytes_to_transfer, unsigned int *out_num_sgs) | |
1011 | { | |
1012 | struct scatterlist *out_sg; | |
1013 | unsigned int bytes_processed = 0, offset_into_current_page_data = 0, | |
1014 | nents; | |
1015 | struct scatterlist *current_xfer_sg = in_sg; | |
1016 | struct scatterlist *current_seg_sg, *last_seg_sg; | |
1017 | ||
1018 | /* skip previously transferred pages. */ | |
1019 | while ((current_xfer_sg) && | |
1020 | (bytes_processed < bytes_transferred)) { | |
1021 | bytes_processed += current_xfer_sg->length; | |
1022 | ||
1023 | /* advance the sg if current segment starts on or past the | |
1024 | next page. */ | |
1025 | if (bytes_processed <= bytes_transferred) | |
1026 | current_xfer_sg = sg_next(current_xfer_sg); | |
1027 | } | |
1028 | ||
1029 | /* the data for the current segment starts in current_xfer_sg. | |
1030 | calculate the offset. */ | |
1031 | if (bytes_processed > bytes_transferred) { | |
1032 | offset_into_current_page_data = current_xfer_sg->length - | |
1033 | (bytes_processed - bytes_transferred); | |
1034 | } | |
1035 | ||
1036 | /* calculate the number of pages needed by this segment. */ | |
1037 | nents = DIV_ROUND_UP((bytes_to_transfer + | |
1038 | offset_into_current_page_data + | |
1039 | current_xfer_sg->offset), | |
1040 | PAGE_SIZE); | |
1041 | ||
1042 | out_sg = kmalloc((sizeof(struct scatterlist) * nents), GFP_ATOMIC); | |
1043 | if (out_sg) { | |
1044 | sg_init_table(out_sg, nents); | |
1045 | ||
1046 | /* copy the portion of the incoming SG that correlates to the | |
1047 | * data to be transferred by this segment to the segment SG. */ | |
1048 | last_seg_sg = current_seg_sg = out_sg; | |
1049 | bytes_processed = 0; | |
1050 | ||
1051 | /* reset nents and calculate the actual number of sg entries | |
1052 | needed. */ | |
1053 | nents = 0; | |
1054 | while ((bytes_processed < bytes_to_transfer) && | |
1055 | current_seg_sg && current_xfer_sg) { | |
1056 | unsigned int page_len = min((current_xfer_sg->length - | |
1057 | offset_into_current_page_data), | |
1058 | (bytes_to_transfer - bytes_processed)); | |
1059 | ||
1060 | sg_set_page(current_seg_sg, sg_page(current_xfer_sg), | |
1061 | page_len, | |
1062 | current_xfer_sg->offset + | |
1063 | offset_into_current_page_data); | |
1064 | ||
1065 | bytes_processed += page_len; | |
1066 | ||
1067 | last_seg_sg = current_seg_sg; | |
1068 | current_seg_sg = sg_next(current_seg_sg); | |
1069 | current_xfer_sg = sg_next(current_xfer_sg); | |
1070 | ||
1071 | /* only the first page may require additional offset. */ | |
1072 | offset_into_current_page_data = 0; | |
1073 | nents++; | |
1074 | } | |
1075 | ||
1076 | /* update num_sgs and terminate the list since we may have | |
1077 | * concatenated pages. */ | |
1078 | sg_mark_end(last_seg_sg); | |
1079 | *out_num_sgs = nents; | |
1080 | } | |
1081 | ||
1082 | return out_sg; | |
1083 | } | |
1084 | ||
7a32d9be TP |
1085 | /* |
1086 | * Populate DMA buffer info for the isoc dto urb. | |
1087 | */ | |
2101242c TP |
1088 | static void __wa_populate_dto_urb_isoc(struct wa_xfer *xfer, |
1089 | struct wa_seg *seg, int curr_iso_frame) | |
7a32d9be | 1090 | { |
7a32d9be TP |
1091 | seg->dto_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
1092 | seg->dto_urb->sg = NULL; | |
1093 | seg->dto_urb->num_sgs = 0; | |
f07ddb9e TP |
1094 | /* dto urb buffer address pulled from iso_frame_desc. */ |
1095 | seg->dto_urb->transfer_dma = xfer->urb->transfer_dma + | |
1096 | xfer->urb->iso_frame_desc[curr_iso_frame].offset; | |
1097 | /* The Alereon HWA sends a single URB with all isoc segs. */ | |
1098 | if (xfer->wa->quirks & WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC) | |
1099 | seg->dto_urb->transfer_buffer_length = seg->isoc_size; | |
1100 | else | |
1101 | seg->dto_urb->transfer_buffer_length = | |
1102 | xfer->urb->iso_frame_desc[curr_iso_frame].length; | |
7a32d9be TP |
1103 | } |
1104 | ||
ffd6d17d TP |
1105 | /* |
1106 | * Populate buffer ptr and size, DMA buffer or SG list for the dto urb. | |
1107 | */ | |
1108 | static int __wa_populate_dto_urb(struct wa_xfer *xfer, | |
1109 | struct wa_seg *seg, size_t buf_itr_offset, size_t buf_itr_size) | |
1110 | { | |
1111 | int result = 0; | |
1112 | ||
1113 | if (xfer->is_dma) { | |
1114 | seg->dto_urb->transfer_dma = | |
1115 | xfer->urb->transfer_dma + buf_itr_offset; | |
1116 | seg->dto_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1117 | seg->dto_urb->sg = NULL; | |
1118 | seg->dto_urb->num_sgs = 0; | |
1119 | } else { | |
1120 | /* do buffer or SG processing. */ | |
1121 | seg->dto_urb->transfer_flags &= | |
1122 | ~URB_NO_TRANSFER_DMA_MAP; | |
1123 | /* this should always be 0 before a resubmit. */ | |
1124 | seg->dto_urb->num_mapped_sgs = 0; | |
1125 | ||
1126 | if (xfer->urb->transfer_buffer) { | |
1127 | seg->dto_urb->transfer_buffer = | |
1128 | xfer->urb->transfer_buffer + | |
1129 | buf_itr_offset; | |
1130 | seg->dto_urb->sg = NULL; | |
1131 | seg->dto_urb->num_sgs = 0; | |
1132 | } else { | |
1133 | seg->dto_urb->transfer_buffer = NULL; | |
1134 | ||
1135 | /* | |
1136 | * allocate an SG list to store seg_size bytes | |
1137 | * and copy the subset of the xfer->urb->sg that | |
1138 | * matches the buffer subset we are about to | |
1139 | * read. | |
1140 | */ | |
1141 | seg->dto_urb->sg = wa_xfer_create_subset_sg( | |
1142 | xfer->urb->sg, | |
1143 | buf_itr_offset, buf_itr_size, | |
1144 | &(seg->dto_urb->num_sgs)); | |
1145 | if (!(seg->dto_urb->sg)) | |
1146 | result = -ENOMEM; | |
1147 | } | |
1148 | } | |
1149 | seg->dto_urb->transfer_buffer_length = buf_itr_size; | |
1150 | ||
1151 | return result; | |
1152 | } | |
1153 | ||
df365423 IPG |
1154 | /* |
1155 | * Allocate the segs array and initialize each of them | |
1156 | * | |
1157 | * The segments are freed by wa_xfer_destroy() when the xfer use count | |
1158 | * drops to zero; however, because each segment is given the same life | |
1159 | * cycle as the USB URB it contains, it is actually freed by | |
1160 | * usb_put_urb() on the contained USB URB (twisted, eh?). | |
1161 | */ | |
1162 | static int __wa_xfer_setup_segs(struct wa_xfer *xfer, size_t xfer_hdr_size) | |
1163 | { | |
2101242c | 1164 | int result, cnt, iso_frame_offset; |
df365423 IPG |
1165 | size_t alloc_size = sizeof(*xfer->seg[0]) |
1166 | - sizeof(xfer->seg[0]->xfer_hdr) + xfer_hdr_size; | |
1167 | struct usb_device *usb_dev = xfer->wa->usb_dev; | |
1168 | const struct usb_endpoint_descriptor *dto_epd = xfer->wa->dto_epd; | |
1169 | struct wa_seg *seg; | |
2101242c | 1170 | size_t buf_itr, buf_size, buf_itr_size; |
226b3a2e | 1171 | int isoc_frame_offset = 0; |
df365423 IPG |
1172 | |
1173 | result = -ENOMEM; | |
92c4d9bd | 1174 | xfer->seg = kcalloc(xfer->segs, sizeof(xfer->seg[0]), GFP_ATOMIC); |
df365423 IPG |
1175 | if (xfer->seg == NULL) |
1176 | goto error_segs_kzalloc; | |
1177 | buf_itr = 0; | |
1178 | buf_size = xfer->urb->transfer_buffer_length; | |
2101242c TP |
1179 | iso_frame_offset = 0; |
1180 | for (cnt = 0; cnt < xfer->segs; cnt++) { | |
1181 | size_t iso_pkt_descr_size = 0; | |
1182 | int seg_isoc_frame_count = 0, seg_isoc_size = 0; | |
7a32d9be | 1183 | |
226b3a2e TP |
1184 | /* |
1185 | * Adjust the size of the segment object to contain space for | |
1186 | * the isoc packet descriptor buffer. | |
1187 | */ | |
2101242c TP |
1188 | if (usb_pipeisoc(xfer->urb->pipe)) { |
1189 | seg_isoc_frame_count = | |
1190 | __wa_seg_calculate_isoc_frame_count(xfer, | |
226b3a2e | 1191 | isoc_frame_offset, &seg_isoc_size); |
7a32d9be | 1192 | |
2101242c TP |
1193 | iso_pkt_descr_size = |
1194 | sizeof(struct wa_xfer_packet_info_hwaiso) + | |
1195 | (seg_isoc_frame_count * sizeof(__le16)); | |
1196 | } | |
1197 | seg = xfer->seg[cnt] = kmalloc(alloc_size + iso_pkt_descr_size, | |
1198 | GFP_ATOMIC); | |
df365423 | 1199 | if (seg == NULL) |
66591015 | 1200 | goto error_seg_kmalloc; |
df365423 IPG |
1201 | wa_seg_init(seg); |
1202 | seg->xfer = xfer; | |
1203 | seg->index = cnt; | |
09d94cbd | 1204 | usb_fill_bulk_urb(&seg->tr_urb, usb_dev, |
df365423 IPG |
1205 | usb_sndbulkpipe(usb_dev, |
1206 | dto_epd->bEndpointAddress), | |
1207 | &seg->xfer_hdr, xfer_hdr_size, | |
09d94cbd | 1208 | wa_seg_tr_cb, seg); |
2b81c083 | 1209 | buf_itr_size = min(buf_size, xfer->seg_size); |
226b3a2e TP |
1210 | |
1211 | if (usb_pipeisoc(xfer->urb->pipe)) { | |
1212 | seg->isoc_frame_count = seg_isoc_frame_count; | |
1213 | seg->isoc_frame_offset = isoc_frame_offset; | |
1214 | seg->isoc_size = seg_isoc_size; | |
1215 | /* iso packet descriptor. */ | |
1216 | seg->isoc_pack_desc_urb = | |
1217 | usb_alloc_urb(0, GFP_ATOMIC); | |
1218 | if (seg->isoc_pack_desc_urb == NULL) | |
1219 | goto error_iso_pack_desc_alloc; | |
1220 | /* | |
1221 | * The buffer for the isoc packet descriptor starts | |
1222 | * after the transfer request header in the | |
1223 | * segment object memory buffer. | |
1224 | */ | |
1225 | usb_fill_bulk_urb( | |
1226 | seg->isoc_pack_desc_urb, usb_dev, | |
1227 | usb_sndbulkpipe(usb_dev, | |
1228 | dto_epd->bEndpointAddress), | |
1229 | (void *)(&seg->xfer_hdr) + | |
1230 | xfer_hdr_size, | |
1231 | iso_pkt_descr_size, | |
1232 | wa_seg_iso_pack_desc_cb, seg); | |
1233 | ||
1234 | /* adjust starting frame offset for next seg. */ | |
1235 | isoc_frame_offset += seg_isoc_frame_count; | |
1236 | } | |
1237 | ||
df365423 | 1238 | if (xfer->is_inbound == 0 && buf_size > 0) { |
2b81c083 | 1239 | /* outbound data. */ |
df365423 IPG |
1240 | seg->dto_urb = usb_alloc_urb(0, GFP_ATOMIC); |
1241 | if (seg->dto_urb == NULL) | |
1242 | goto error_dto_alloc; | |
1243 | usb_fill_bulk_urb( | |
1244 | seg->dto_urb, usb_dev, | |
1245 | usb_sndbulkpipe(usb_dev, | |
1246 | dto_epd->bEndpointAddress), | |
1247 | NULL, 0, wa_seg_dto_cb, seg); | |
ffd6d17d | 1248 | |
7a32d9be | 1249 | if (usb_pipeisoc(xfer->urb->pipe)) { |
2101242c TP |
1250 | /* |
1251 | * Fill in the xfer buffer information for the | |
1252 | * first isoc frame. Subsequent frames in this | |
1253 | * segment will be filled in and sent from the | |
1254 | * DTO completion routine, if needed. | |
1255 | */ | |
1256 | __wa_populate_dto_urb_isoc(xfer, seg, | |
226b3a2e | 1257 | seg->isoc_frame_offset); |
7a32d9be TP |
1258 | } else { |
1259 | /* fill in the xfer buffer information. */ | |
1260 | result = __wa_populate_dto_urb(xfer, seg, | |
1261 | buf_itr, buf_itr_size); | |
1262 | if (result < 0) | |
1263 | goto error_seg_outbound_populate; | |
1264 | ||
1265 | buf_itr += buf_itr_size; | |
1266 | buf_size -= buf_itr_size; | |
1267 | } | |
df365423 IPG |
1268 | } |
1269 | seg->status = WA_SEG_READY; | |
df365423 IPG |
1270 | } |
1271 | return 0; | |
1272 | ||
ffd6d17d TP |
1273 | /* |
1274 | * Free the memory for the current segment which failed to init. | |
1275 | * Use the fact that cnt is left at were it failed. The remaining | |
1276 | * segments will be cleaned up by wa_xfer_destroy. | |
1277 | */ | |
1278 | error_seg_outbound_populate: | |
11b1bf81 | 1279 | usb_free_urb(xfer->seg[cnt]->dto_urb); |
df365423 | 1280 | error_dto_alloc: |
226b3a2e TP |
1281 | usb_free_urb(xfer->seg[cnt]->isoc_pack_desc_urb); |
1282 | error_iso_pack_desc_alloc: | |
df365423 | 1283 | kfree(xfer->seg[cnt]); |
ffd6d17d | 1284 | xfer->seg[cnt] = NULL; |
66591015 | 1285 | error_seg_kmalloc: |
df365423 IPG |
1286 | error_segs_kzalloc: |
1287 | return result; | |
1288 | } | |
1289 | ||
1290 | /* | |
1291 | * Allocates all the stuff needed to submit a transfer | |
1292 | * | |
1293 | * Breaks the whole data buffer in a list of segments, each one has a | |
1294 | * structure allocated to it and linked in xfer->seg[index] | |
1295 | * | |
1296 | * FIXME: merge setup_segs() and the last part of this function, no | |
1297 | * need to do two for loops when we could run everything in a | |
1298 | * single one | |
1299 | */ | |
1300 | static int __wa_xfer_setup(struct wa_xfer *xfer, struct urb *urb) | |
1301 | { | |
1302 | int result; | |
1303 | struct device *dev = &xfer->wa->usb_iface->dev; | |
1304 | enum wa_xfer_type xfer_type = 0; /* shut up GCC */ | |
1305 | size_t xfer_hdr_size, cnt, transfer_size; | |
1306 | struct wa_xfer_hdr *xfer_hdr0, *xfer_hdr; | |
1307 | ||
df365423 IPG |
1308 | result = __wa_xfer_setup_sizes(xfer, &xfer_type); |
1309 | if (result < 0) | |
1310 | goto error_setup_sizes; | |
1311 | xfer_hdr_size = result; | |
1312 | result = __wa_xfer_setup_segs(xfer, xfer_hdr_size); | |
1313 | if (result < 0) { | |
1314 | dev_err(dev, "xfer %p: Failed to allocate %d segments: %d\n", | |
1315 | xfer, xfer->segs, result); | |
1316 | goto error_setup_segs; | |
1317 | } | |
1318 | /* Fill the first header */ | |
1319 | xfer_hdr0 = &xfer->seg[0]->xfer_hdr; | |
1320 | wa_xfer_id_init(xfer); | |
1321 | __wa_xfer_setup_hdr0(xfer, xfer_hdr0, xfer_type, xfer_hdr_size); | |
1322 | ||
7a32d9be | 1323 | /* Fill remaining headers */ |
df365423 | 1324 | xfer_hdr = xfer_hdr0; |
7a32d9be TP |
1325 | if (xfer_type == WA_XFER_TYPE_ISO) { |
1326 | xfer_hdr0->dwTransferLength = | |
2101242c | 1327 | cpu_to_le32(xfer->seg[0]->isoc_size); |
7a32d9be | 1328 | for (cnt = 1; cnt < xfer->segs; cnt++) { |
7a32d9be | 1329 | struct wa_xfer_packet_info_hwaiso *packet_desc; |
2101242c | 1330 | struct wa_seg *seg = xfer->seg[cnt]; |
756a2eed | 1331 | struct wa_xfer_hwaiso *xfer_iso; |
7a32d9be | 1332 | |
2101242c | 1333 | xfer_hdr = &seg->xfer_hdr; |
756a2eed TP |
1334 | xfer_iso = container_of(xfer_hdr, |
1335 | struct wa_xfer_hwaiso, hdr); | |
7a32d9be TP |
1336 | packet_desc = ((void *)xfer_hdr) + xfer_hdr_size; |
1337 | /* | |
2101242c TP |
1338 | * Copy values from the 0th header. Segment specific |
1339 | * values are set below. | |
7a32d9be | 1340 | */ |
2101242c | 1341 | memcpy(xfer_hdr, xfer_hdr0, xfer_hdr_size); |
7a32d9be TP |
1342 | xfer_hdr->bTransferSegment = cnt; |
1343 | xfer_hdr->dwTransferLength = | |
2101242c | 1344 | cpu_to_le32(seg->isoc_size); |
756a2eed TP |
1345 | xfer_iso->dwNumOfPackets = |
1346 | cpu_to_le32(seg->isoc_frame_count); | |
2101242c TP |
1347 | __wa_setup_isoc_packet_descr(packet_desc, xfer, seg); |
1348 | seg->status = WA_SEG_READY; | |
7a32d9be TP |
1349 | } |
1350 | } else { | |
1351 | transfer_size = urb->transfer_buffer_length; | |
1352 | xfer_hdr0->dwTransferLength = transfer_size > xfer->seg_size ? | |
1353 | cpu_to_le32(xfer->seg_size) : | |
1354 | cpu_to_le32(transfer_size); | |
df365423 | 1355 | transfer_size -= xfer->seg_size; |
7a32d9be TP |
1356 | for (cnt = 1; cnt < xfer->segs; cnt++) { |
1357 | xfer_hdr = &xfer->seg[cnt]->xfer_hdr; | |
1358 | memcpy(xfer_hdr, xfer_hdr0, xfer_hdr_size); | |
1359 | xfer_hdr->bTransferSegment = cnt; | |
1360 | xfer_hdr->dwTransferLength = | |
1361 | transfer_size > xfer->seg_size ? | |
1362 | cpu_to_le32(xfer->seg_size) | |
1363 | : cpu_to_le32(transfer_size); | |
1364 | xfer->seg[cnt]->status = WA_SEG_READY; | |
1365 | transfer_size -= xfer->seg_size; | |
1366 | } | |
df365423 IPG |
1367 | } |
1368 | xfer_hdr->bTransferSegment |= 0x80; /* this is the last segment */ | |
1369 | result = 0; | |
1370 | error_setup_segs: | |
1371 | error_setup_sizes: | |
df365423 IPG |
1372 | return result; |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | * | |
1377 | * | |
1378 | * rpipe->seg_lock is held! | |
1379 | */ | |
1380 | static int __wa_seg_submit(struct wa_rpipe *rpipe, struct wa_xfer *xfer, | |
679ee475 | 1381 | struct wa_seg *seg, int *dto_done) |
df365423 IPG |
1382 | { |
1383 | int result; | |
679ee475 TP |
1384 | |
1385 | /* default to done unless we encounter a multi-frame isoc segment. */ | |
1386 | *dto_done = 1; | |
1387 | ||
618836cc TP |
1388 | /* |
1389 | * Take a ref for each segment urb so the xfer cannot disappear until | |
1390 | * all of the callbacks run. | |
1391 | */ | |
1392 | wa_xfer_get(xfer); | |
09d94cbd | 1393 | /* submit the transfer request. */ |
618836cc | 1394 | seg->status = WA_SEG_SUBMITTED; |
09d94cbd | 1395 | result = usb_submit_urb(&seg->tr_urb, GFP_ATOMIC); |
df365423 | 1396 | if (result < 0) { |
7a32d9be TP |
1397 | pr_err("%s: xfer %p#%u: REQ submit failed: %d\n", |
1398 | __func__, xfer, seg->index, result); | |
618836cc TP |
1399 | wa_xfer_put(xfer); |
1400 | goto error_tr_submit; | |
df365423 | 1401 | } |
7a32d9be TP |
1402 | /* submit the isoc packet descriptor if present. */ |
1403 | if (seg->isoc_pack_desc_urb) { | |
618836cc | 1404 | wa_xfer_get(xfer); |
7a32d9be | 1405 | result = usb_submit_urb(seg->isoc_pack_desc_urb, GFP_ATOMIC); |
ea1af42d | 1406 | seg->isoc_frame_index = 0; |
7a32d9be TP |
1407 | if (result < 0) { |
1408 | pr_err("%s: xfer %p#%u: ISO packet descriptor submit failed: %d\n", | |
1409 | __func__, xfer, seg->index, result); | |
618836cc | 1410 | wa_xfer_put(xfer); |
7a32d9be TP |
1411 | goto error_iso_pack_desc_submit; |
1412 | } | |
1413 | } | |
09d94cbd | 1414 | /* submit the out data if this is an out request. */ |
df365423 | 1415 | if (seg->dto_urb) { |
226b3a2e | 1416 | struct wahc *wa = xfer->wa; |
618836cc | 1417 | wa_xfer_get(xfer); |
df365423 IPG |
1418 | result = usb_submit_urb(seg->dto_urb, GFP_ATOMIC); |
1419 | if (result < 0) { | |
7a32d9be TP |
1420 | pr_err("%s: xfer %p#%u: DTO submit failed: %d\n", |
1421 | __func__, xfer, seg->index, result); | |
618836cc | 1422 | wa_xfer_put(xfer); |
df365423 IPG |
1423 | goto error_dto_submit; |
1424 | } | |
226b3a2e TP |
1425 | /* |
1426 | * If this segment contains more than one isoc frame, hold | |
1427 | * onto the dto resource until we send all frames. | |
1428 | * Only applies to non-Alereon devices. | |
1429 | */ | |
1430 | if (((wa->quirks & WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC) == 0) | |
1431 | && (seg->isoc_frame_count > 1)) | |
1432 | *dto_done = 0; | |
df365423 | 1433 | } |
df365423 IPG |
1434 | rpipe_avail_dec(rpipe); |
1435 | return 0; | |
1436 | ||
1437 | error_dto_submit: | |
7a32d9be TP |
1438 | usb_unlink_urb(seg->isoc_pack_desc_urb); |
1439 | error_iso_pack_desc_submit: | |
09d94cbd | 1440 | usb_unlink_urb(&seg->tr_urb); |
618836cc | 1441 | error_tr_submit: |
df365423 IPG |
1442 | seg->status = WA_SEG_ERROR; |
1443 | seg->result = result; | |
2101242c | 1444 | *dto_done = 1; |
df365423 IPG |
1445 | return result; |
1446 | } | |
1447 | ||
1448 | /* | |
679ee475 TP |
1449 | * Execute more queued request segments until the maximum concurrent allowed. |
1450 | * Return true if the DTO resource was acquired and released. | |
df365423 IPG |
1451 | * |
1452 | * The ugly unlock/lock sequence on the error path is needed as the | |
1453 | * xfer->lock normally nests the seg_lock and not viceversa. | |
df365423 | 1454 | */ |
679ee475 | 1455 | static int __wa_xfer_delayed_run(struct wa_rpipe *rpipe, int *dto_waiting) |
df365423 | 1456 | { |
679ee475 | 1457 | int result, dto_acquired = 0, dto_done = 0; |
df365423 IPG |
1458 | struct device *dev = &rpipe->wa->usb_iface->dev; |
1459 | struct wa_seg *seg; | |
1460 | struct wa_xfer *xfer; | |
1461 | unsigned long flags; | |
1462 | ||
679ee475 TP |
1463 | *dto_waiting = 0; |
1464 | ||
df365423 IPG |
1465 | spin_lock_irqsave(&rpipe->seg_lock, flags); |
1466 | while (atomic_read(&rpipe->segs_available) > 0 | |
679ee475 TP |
1467 | && !list_empty(&rpipe->seg_list) |
1468 | && (dto_acquired = __wa_dto_try_get(rpipe->wa))) { | |
e9a088fa | 1469 | seg = list_first_entry(&(rpipe->seg_list), struct wa_seg, |
df365423 IPG |
1470 | list_node); |
1471 | list_del(&seg->list_node); | |
1472 | xfer = seg->xfer; | |
618836cc TP |
1473 | /* |
1474 | * Get a reference to the xfer in case the callbacks for the | |
1475 | * URBs submitted by __wa_seg_submit attempt to complete | |
1476 | * the xfer before this function completes. | |
1477 | */ | |
1478 | wa_xfer_get(xfer); | |
679ee475 TP |
1479 | result = __wa_seg_submit(rpipe, xfer, seg, &dto_done); |
1480 | /* release the dto resource if this RPIPE is done with it. */ | |
1481 | if (dto_done) | |
1482 | __wa_dto_put(rpipe->wa); | |
b9c84be6 TP |
1483 | dev_dbg(dev, "xfer %p ID %08X#%u submitted from delayed [%d segments available] %d\n", |
1484 | xfer, wa_xfer_id(xfer), seg->index, | |
1485 | atomic_read(&rpipe->segs_available), result); | |
df365423 | 1486 | if (unlikely(result < 0)) { |
5da43afc TP |
1487 | int done; |
1488 | ||
df365423 IPG |
1489 | spin_unlock_irqrestore(&rpipe->seg_lock, flags); |
1490 | spin_lock_irqsave(&xfer->lock, flags); | |
1491 | __wa_xfer_abort(xfer); | |
618836cc TP |
1492 | /* |
1493 | * This seg was marked as submitted when it was put on | |
1494 | * the RPIPE seg_list. Mark it done. | |
1495 | */ | |
df365423 | 1496 | xfer->segs_done++; |
5da43afc | 1497 | done = __wa_xfer_is_done(xfer); |
df365423 | 1498 | spin_unlock_irqrestore(&xfer->lock, flags); |
5da43afc TP |
1499 | if (done) |
1500 | wa_xfer_completion(xfer); | |
df365423 IPG |
1501 | spin_lock_irqsave(&rpipe->seg_lock, flags); |
1502 | } | |
618836cc | 1503 | wa_xfer_put(xfer); |
df365423 | 1504 | } |
679ee475 TP |
1505 | /* |
1506 | * Mark this RPIPE as waiting if dto was not acquired, there are | |
1507 | * delayed segs and no active transfers to wake us up later. | |
1508 | */ | |
1509 | if (!dto_acquired && !list_empty(&rpipe->seg_list) | |
1510 | && (atomic_read(&rpipe->segs_available) == | |
1511 | le16_to_cpu(rpipe->descr.wRequests))) | |
1512 | *dto_waiting = 1; | |
1513 | ||
df365423 | 1514 | spin_unlock_irqrestore(&rpipe->seg_lock, flags); |
679ee475 TP |
1515 | |
1516 | return dto_done; | |
1517 | } | |
1518 | ||
1519 | static void wa_xfer_delayed_run(struct wa_rpipe *rpipe) | |
1520 | { | |
1521 | int dto_waiting; | |
1522 | int dto_done = __wa_xfer_delayed_run(rpipe, &dto_waiting); | |
1523 | ||
1524 | /* | |
1525 | * If this RPIPE is waiting on the DTO resource, add it to the tail of | |
1526 | * the waiting list. | |
1527 | * Otherwise, if the WA DTO resource was acquired and released by | |
1528 | * __wa_xfer_delayed_run, another RPIPE may have attempted to acquire | |
1529 | * DTO and failed during that time. Check the delayed list and process | |
1530 | * any waiters. Start searching from the next RPIPE index. | |
1531 | */ | |
1532 | if (dto_waiting) | |
1533 | wa_add_delayed_rpipe(rpipe->wa, rpipe); | |
1534 | else if (dto_done) | |
1535 | wa_check_for_delayed_rpipes(rpipe->wa); | |
df365423 IPG |
1536 | } |
1537 | ||
1538 | /* | |
1539 | * | |
1540 | * xfer->lock is taken | |
1541 | * | |
1542 | * On failure submitting we just stop submitting and return error; | |
1543 | * wa_urb_enqueue_b() will execute the completion path | |
1544 | */ | |
1545 | static int __wa_xfer_submit(struct wa_xfer *xfer) | |
1546 | { | |
679ee475 | 1547 | int result, dto_acquired = 0, dto_done = 0, dto_waiting = 0; |
df365423 IPG |
1548 | struct wahc *wa = xfer->wa; |
1549 | struct device *dev = &wa->usb_iface->dev; | |
1550 | unsigned cnt; | |
1551 | struct wa_seg *seg; | |
1552 | unsigned long flags; | |
1553 | struct wa_rpipe *rpipe = xfer->ep->hcpriv; | |
1554 | size_t maxrequests = le16_to_cpu(rpipe->descr.wRequests); | |
1555 | u8 available; | |
1556 | u8 empty; | |
1557 | ||
df365423 IPG |
1558 | spin_lock_irqsave(&wa->xfer_list_lock, flags); |
1559 | list_add_tail(&xfer->list_node, &wa->xfer_list); | |
1560 | spin_unlock_irqrestore(&wa->xfer_list_lock, flags); | |
1561 | ||
1562 | BUG_ON(atomic_read(&rpipe->segs_available) > maxrequests); | |
1563 | result = 0; | |
1564 | spin_lock_irqsave(&rpipe->seg_lock, flags); | |
1565 | for (cnt = 0; cnt < xfer->segs; cnt++) { | |
679ee475 TP |
1566 | int delay_seg = 1; |
1567 | ||
df365423 IPG |
1568 | available = atomic_read(&rpipe->segs_available); |
1569 | empty = list_empty(&rpipe->seg_list); | |
1570 | seg = xfer->seg[cnt]; | |
679ee475 TP |
1571 | if (available && empty) { |
1572 | /* | |
1573 | * Only attempt to acquire DTO if we have a segment | |
1574 | * to send. | |
1575 | */ | |
1576 | dto_acquired = __wa_dto_try_get(rpipe->wa); | |
1577 | if (dto_acquired) { | |
1578 | delay_seg = 0; | |
1579 | result = __wa_seg_submit(rpipe, xfer, seg, | |
1580 | &dto_done); | |
2101242c TP |
1581 | dev_dbg(dev, "xfer %p ID 0x%08X#%u: available %u empty %u submitted\n", |
1582 | xfer, wa_xfer_id(xfer), cnt, available, | |
1583 | empty); | |
679ee475 TP |
1584 | if (dto_done) |
1585 | __wa_dto_put(rpipe->wa); | |
1586 | ||
1587 | if (result < 0) { | |
1588 | __wa_xfer_abort(xfer); | |
1589 | goto error_seg_submit; | |
1590 | } | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | if (delay_seg) { | |
2101242c TP |
1595 | dev_dbg(dev, "xfer %p ID 0x%08X#%u: available %u empty %u delayed\n", |
1596 | xfer, wa_xfer_id(xfer), cnt, available, empty); | |
df365423 IPG |
1597 | seg->status = WA_SEG_DELAYED; |
1598 | list_add_tail(&seg->list_node, &rpipe->seg_list); | |
df365423 IPG |
1599 | } |
1600 | xfer->segs_submitted++; | |
1601 | } | |
df365423 | 1602 | error_seg_submit: |
679ee475 TP |
1603 | /* |
1604 | * Mark this RPIPE as waiting if dto was not acquired, there are | |
1605 | * delayed segs and no active transfers to wake us up later. | |
1606 | */ | |
1607 | if (!dto_acquired && !list_empty(&rpipe->seg_list) | |
1608 | && (atomic_read(&rpipe->segs_available) == | |
1609 | le16_to_cpu(rpipe->descr.wRequests))) | |
1610 | dto_waiting = 1; | |
df365423 | 1611 | spin_unlock_irqrestore(&rpipe->seg_lock, flags); |
679ee475 TP |
1612 | |
1613 | if (dto_waiting) | |
1614 | wa_add_delayed_rpipe(rpipe->wa, rpipe); | |
1615 | else if (dto_done) | |
1616 | wa_check_for_delayed_rpipes(rpipe->wa); | |
1617 | ||
df365423 IPG |
1618 | return result; |
1619 | } | |
1620 | ||
1621 | /* | |
1622 | * Second part of a URB/transfer enqueuement | |
1623 | * | |
1624 | * Assumes this comes from wa_urb_enqueue() [maybe through | |
1625 | * wa_urb_enqueue_run()]. At this point: | |
1626 | * | |
1627 | * xfer->wa filled and refcounted | |
1628 | * xfer->ep filled with rpipe refcounted if | |
1629 | * delayed == 0 | |
1630 | * xfer->urb filled and refcounted (this is the case when called | |
1631 | * from wa_urb_enqueue() as we come from usb_submit_urb() | |
1632 | * and when called by wa_urb_enqueue_run(), as we took an | |
1633 | * extra ref dropped by _run() after we return). | |
1634 | * xfer->gfp filled | |
1635 | * | |
1636 | * If we fail at __wa_xfer_submit(), then we just check if we are done | |
1637 | * and if so, we run the completion procedure. However, if we are not | |
1638 | * yet done, we do nothing and wait for the completion handlers from | |
1639 | * the submitted URBs or from the xfer-result path to kick in. If xfer | |
1640 | * result never kicks in, the xfer will timeout from the USB code and | |
1641 | * dequeue() will be called. | |
1642 | */ | |
33186c44 | 1643 | static int wa_urb_enqueue_b(struct wa_xfer *xfer) |
df365423 IPG |
1644 | { |
1645 | int result; | |
1646 | unsigned long flags; | |
1647 | struct urb *urb = xfer->urb; | |
1648 | struct wahc *wa = xfer->wa; | |
1649 | struct wusbhc *wusbhc = wa->wusb; | |
df365423 IPG |
1650 | struct wusb_dev *wusb_dev; |
1651 | unsigned done; | |
1652 | ||
df365423 | 1653 | result = rpipe_get_by_ep(wa, xfer->ep, urb, xfer->gfp); |
33186c44 TP |
1654 | if (result < 0) { |
1655 | pr_err("%s: error_rpipe_get\n", __func__); | |
df365423 | 1656 | goto error_rpipe_get; |
33186c44 | 1657 | } |
df365423 IPG |
1658 | result = -ENODEV; |
1659 | /* FIXME: segmentation broken -- kills DWA */ | |
1660 | mutex_lock(&wusbhc->mutex); /* get a WUSB dev */ | |
49fa0921 JS |
1661 | if (urb->dev == NULL) { |
1662 | mutex_unlock(&wusbhc->mutex); | |
33186c44 | 1663 | pr_err("%s: error usb dev gone\n", __func__); |
df365423 | 1664 | goto error_dev_gone; |
49fa0921 | 1665 | } |
df365423 IPG |
1666 | wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, urb->dev); |
1667 | if (wusb_dev == NULL) { | |
1668 | mutex_unlock(&wusbhc->mutex); | |
bbfc3420 TP |
1669 | dev_err(&(urb->dev->dev), "%s: error wusb dev gone\n", |
1670 | __func__); | |
df365423 IPG |
1671 | goto error_dev_gone; |
1672 | } | |
1673 | mutex_unlock(&wusbhc->mutex); | |
1674 | ||
1675 | spin_lock_irqsave(&xfer->lock, flags); | |
1676 | xfer->wusb_dev = wusb_dev; | |
1677 | result = urb->status; | |
33186c44 | 1678 | if (urb->status != -EINPROGRESS) { |
bbfc3420 | 1679 | dev_err(&(urb->dev->dev), "%s: error_dequeued\n", __func__); |
df365423 | 1680 | goto error_dequeued; |
33186c44 | 1681 | } |
df365423 IPG |
1682 | |
1683 | result = __wa_xfer_setup(xfer, urb); | |
33186c44 | 1684 | if (result < 0) { |
bbfc3420 | 1685 | dev_err(&(urb->dev->dev), "%s: error_xfer_setup\n", __func__); |
df365423 | 1686 | goto error_xfer_setup; |
33186c44 | 1687 | } |
618836cc TP |
1688 | /* |
1689 | * Get a xfer reference since __wa_xfer_submit starts asynchronous | |
1690 | * operations that may try to complete the xfer before this function | |
1691 | * exits. | |
1692 | */ | |
1693 | wa_xfer_get(xfer); | |
df365423 | 1694 | result = __wa_xfer_submit(xfer); |
33186c44 | 1695 | if (result < 0) { |
bbfc3420 | 1696 | dev_err(&(urb->dev->dev), "%s: error_xfer_submit\n", __func__); |
df365423 | 1697 | goto error_xfer_submit; |
33186c44 | 1698 | } |
df365423 | 1699 | spin_unlock_irqrestore(&xfer->lock, flags); |
618836cc | 1700 | wa_xfer_put(xfer); |
33186c44 | 1701 | return 0; |
df365423 | 1702 | |
33186c44 TP |
1703 | /* |
1704 | * this is basically wa_xfer_completion() broken up wa_xfer_giveback() | |
1705 | * does a wa_xfer_put() that will call wa_xfer_destroy() and undo | |
1706 | * setup(). | |
df365423 IPG |
1707 | */ |
1708 | error_xfer_setup: | |
1709 | error_dequeued: | |
1710 | spin_unlock_irqrestore(&xfer->lock, flags); | |
1711 | /* FIXME: segmentation broken, kills DWA */ | |
1712 | if (wusb_dev) | |
1713 | wusb_dev_put(wusb_dev); | |
1714 | error_dev_gone: | |
1715 | rpipe_put(xfer->ep->hcpriv); | |
1716 | error_rpipe_get: | |
1717 | xfer->result = result; | |
33186c44 | 1718 | return result; |
df365423 IPG |
1719 | |
1720 | error_xfer_submit: | |
1721 | done = __wa_xfer_is_done(xfer); | |
1722 | xfer->result = result; | |
1723 | spin_unlock_irqrestore(&xfer->lock, flags); | |
1724 | if (done) | |
1725 | wa_xfer_completion(xfer); | |
618836cc | 1726 | wa_xfer_put(xfer); |
33186c44 TP |
1727 | /* return success since the completion routine will run. */ |
1728 | return 0; | |
df365423 IPG |
1729 | } |
1730 | ||
1731 | /* | |
1732 | * Execute the delayed transfers in the Wire Adapter @wa | |
1733 | * | |
1734 | * We need to be careful here, as dequeue() could be called in the | |
1735 | * middle. That's why we do the whole thing under the | |
e9a088fa | 1736 | * wa->xfer_list_lock. If dequeue() jumps in, it first locks xfer->lock |
df365423 | 1737 | * and then checks the list -- so as we would be acquiring in inverse |
e9a088fa TP |
1738 | * order, we move the delayed list to a separate list while locked and then |
1739 | * submit them without the list lock held. | |
df365423 IPG |
1740 | */ |
1741 | void wa_urb_enqueue_run(struct work_struct *ws) | |
1742 | { | |
6d33f7bb | 1743 | struct wahc *wa = container_of(ws, struct wahc, xfer_enqueue_work); |
df365423 IPG |
1744 | struct wa_xfer *xfer, *next; |
1745 | struct urb *urb; | |
e9a088fa | 1746 | LIST_HEAD(tmp_list); |
df365423 | 1747 | |
e9a088fa | 1748 | /* Create a copy of the wa->xfer_delayed_list while holding the lock */ |
df365423 | 1749 | spin_lock_irq(&wa->xfer_list_lock); |
e9a088fa TP |
1750 | list_cut_position(&tmp_list, &wa->xfer_delayed_list, |
1751 | wa->xfer_delayed_list.prev); | |
1752 | spin_unlock_irq(&wa->xfer_list_lock); | |
1753 | ||
1754 | /* | |
1755 | * enqueue from temp list without list lock held since wa_urb_enqueue_b | |
1756 | * can take xfer->lock as well as lock mutexes. | |
1757 | */ | |
1758 | list_for_each_entry_safe(xfer, next, &tmp_list, list_node) { | |
df365423 | 1759 | list_del_init(&xfer->list_node); |
df365423 IPG |
1760 | |
1761 | urb = xfer->urb; | |
33186c44 TP |
1762 | if (wa_urb_enqueue_b(xfer) < 0) |
1763 | wa_xfer_giveback(xfer); | |
df365423 | 1764 | usb_put_urb(urb); /* taken when queuing */ |
df365423 | 1765 | } |
df365423 IPG |
1766 | } |
1767 | EXPORT_SYMBOL_GPL(wa_urb_enqueue_run); | |
1768 | ||
6d33f7bb TP |
1769 | /* |
1770 | * Process the errored transfers on the Wire Adapter outside of interrupt. | |
1771 | */ | |
1772 | void wa_process_errored_transfers_run(struct work_struct *ws) | |
1773 | { | |
1774 | struct wahc *wa = container_of(ws, struct wahc, xfer_error_work); | |
1775 | struct wa_xfer *xfer, *next; | |
1776 | LIST_HEAD(tmp_list); | |
1777 | ||
1778 | pr_info("%s: Run delayed STALL processing.\n", __func__); | |
1779 | ||
1780 | /* Create a copy of the wa->xfer_errored_list while holding the lock */ | |
1781 | spin_lock_irq(&wa->xfer_list_lock); | |
1782 | list_cut_position(&tmp_list, &wa->xfer_errored_list, | |
1783 | wa->xfer_errored_list.prev); | |
1784 | spin_unlock_irq(&wa->xfer_list_lock); | |
1785 | ||
1786 | /* | |
1787 | * run rpipe_clear_feature_stalled from temp list without list lock | |
1788 | * held. | |
1789 | */ | |
1790 | list_for_each_entry_safe(xfer, next, &tmp_list, list_node) { | |
1791 | struct usb_host_endpoint *ep; | |
1792 | unsigned long flags; | |
1793 | struct wa_rpipe *rpipe; | |
1794 | ||
1795 | spin_lock_irqsave(&xfer->lock, flags); | |
1796 | ep = xfer->ep; | |
1797 | rpipe = ep->hcpriv; | |
1798 | spin_unlock_irqrestore(&xfer->lock, flags); | |
1799 | ||
1800 | /* clear RPIPE feature stalled without holding a lock. */ | |
1801 | rpipe_clear_feature_stalled(wa, ep); | |
1802 | ||
1803 | /* complete the xfer. This removes it from the tmp list. */ | |
1804 | wa_xfer_completion(xfer); | |
1805 | ||
1806 | /* check for work. */ | |
1807 | wa_xfer_delayed_run(rpipe); | |
1808 | } | |
1809 | } | |
1810 | EXPORT_SYMBOL_GPL(wa_process_errored_transfers_run); | |
1811 | ||
df365423 IPG |
1812 | /* |
1813 | * Submit a transfer to the Wire Adapter in a delayed way | |
1814 | * | |
1815 | * The process of enqueuing involves possible sleeps() [see | |
1816 | * enqueue_b(), for the rpipe_get() and the mutex_lock()]. If we are | |
1817 | * in an atomic section, we defer the enqueue_b() call--else we call direct. | |
1818 | * | |
1819 | * @urb: We own a reference to it done by the HCI Linux USB stack that | |
1820 | * will be given up by calling usb_hcd_giveback_urb() or by | |
1821 | * returning error from this function -> ergo we don't have to | |
1822 | * refcount it. | |
1823 | */ | |
1824 | int wa_urb_enqueue(struct wahc *wa, struct usb_host_endpoint *ep, | |
1825 | struct urb *urb, gfp_t gfp) | |
1826 | { | |
1827 | int result; | |
1828 | struct device *dev = &wa->usb_iface->dev; | |
1829 | struct wa_xfer *xfer; | |
1830 | unsigned long my_flags; | |
1831 | unsigned cant_sleep = irqs_disabled() | in_atomic(); | |
1832 | ||
2b81c083 TP |
1833 | if ((urb->transfer_buffer == NULL) |
1834 | && (urb->sg == NULL) | |
df365423 IPG |
1835 | && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP) |
1836 | && urb->transfer_buffer_length != 0) { | |
1837 | dev_err(dev, "BUG? urb %p: NULL xfer buffer & NODMA\n", urb); | |
1838 | dump_stack(); | |
1839 | } | |
1840 | ||
b374487e TP |
1841 | spin_lock_irqsave(&wa->xfer_list_lock, my_flags); |
1842 | result = usb_hcd_link_urb_to_ep(&(wa->wusb->usb_hcd), urb); | |
1843 | spin_unlock_irqrestore(&wa->xfer_list_lock, my_flags); | |
1844 | if (result < 0) | |
1845 | goto error_link_urb; | |
1846 | ||
df365423 IPG |
1847 | result = -ENOMEM; |
1848 | xfer = kzalloc(sizeof(*xfer), gfp); | |
1849 | if (xfer == NULL) | |
1850 | goto error_kmalloc; | |
1851 | ||
1852 | result = -ENOENT; | |
1853 | if (urb->status != -EINPROGRESS) /* cancelled */ | |
1854 | goto error_dequeued; /* before starting? */ | |
1855 | wa_xfer_init(xfer); | |
1856 | xfer->wa = wa_get(wa); | |
1857 | xfer->urb = urb; | |
1858 | xfer->gfp = gfp; | |
1859 | xfer->ep = ep; | |
1860 | urb->hcpriv = xfer; | |
bce83697 DV |
1861 | |
1862 | dev_dbg(dev, "xfer %p urb %p pipe 0x%02x [%d bytes] %s %s %s\n", | |
1863 | xfer, urb, urb->pipe, urb->transfer_buffer_length, | |
1864 | urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP ? "dma" : "nodma", | |
1865 | urb->pipe & USB_DIR_IN ? "inbound" : "outbound", | |
1866 | cant_sleep ? "deferred" : "inline"); | |
1867 | ||
df365423 IPG |
1868 | if (cant_sleep) { |
1869 | usb_get_urb(urb); | |
1870 | spin_lock_irqsave(&wa->xfer_list_lock, my_flags); | |
1871 | list_add_tail(&xfer->list_node, &wa->xfer_delayed_list); | |
1872 | spin_unlock_irqrestore(&wa->xfer_list_lock, my_flags); | |
6d33f7bb | 1873 | queue_work(wusbd, &wa->xfer_enqueue_work); |
df365423 | 1874 | } else { |
33186c44 TP |
1875 | result = wa_urb_enqueue_b(xfer); |
1876 | if (result < 0) { | |
1877 | /* | |
1878 | * URB submit/enqueue failed. Clean up, return an | |
1879 | * error and do not run the callback. This avoids | |
1880 | * an infinite submit/complete loop. | |
1881 | */ | |
1882 | dev_err(dev, "%s: URB enqueue failed: %d\n", | |
1883 | __func__, result); | |
1884 | wa_put(xfer->wa); | |
1885 | wa_xfer_put(xfer); | |
b374487e TP |
1886 | spin_lock_irqsave(&wa->xfer_list_lock, my_flags); |
1887 | usb_hcd_unlink_urb_from_ep(&(wa->wusb->usb_hcd), urb); | |
1888 | spin_unlock_irqrestore(&wa->xfer_list_lock, my_flags); | |
33186c44 TP |
1889 | return result; |
1890 | } | |
df365423 | 1891 | } |
df365423 IPG |
1892 | return 0; |
1893 | ||
1894 | error_dequeued: | |
1895 | kfree(xfer); | |
1896 | error_kmalloc: | |
b374487e TP |
1897 | spin_lock_irqsave(&wa->xfer_list_lock, my_flags); |
1898 | usb_hcd_unlink_urb_from_ep(&(wa->wusb->usb_hcd), urb); | |
1899 | spin_unlock_irqrestore(&wa->xfer_list_lock, my_flags); | |
1900 | error_link_urb: | |
df365423 IPG |
1901 | return result; |
1902 | } | |
1903 | EXPORT_SYMBOL_GPL(wa_urb_enqueue); | |
1904 | ||
1905 | /* | |
1906 | * Dequeue a URB and make sure uwb_hcd_giveback_urb() [completion | |
1907 | * handler] is called. | |
1908 | * | |
1909 | * Until a transfer goes successfully through wa_urb_enqueue() it | |
1910 | * needs to be dequeued with completion calling; when stuck in delayed | |
1911 | * or before wa_xfer_setup() is called, we need to do completion. | |
1912 | * | |
1913 | * not setup If there is no hcpriv yet, that means that that enqueue | |
1914 | * still had no time to set the xfer up. Because | |
1915 | * urb->status should be other than -EINPROGRESS, | |
1916 | * enqueue() will catch that and bail out. | |
1917 | * | |
1918 | * If the transfer has gone through setup, we just need to clean it | |
1919 | * up. If it has gone through submit(), we have to abort it [with an | |
1920 | * asynch request] and then make sure we cancel each segment. | |
1921 | * | |
1922 | */ | |
b374487e | 1923 | int wa_urb_dequeue(struct wahc *wa, struct urb *urb, int status) |
df365423 | 1924 | { |
df365423 IPG |
1925 | unsigned long flags, flags2; |
1926 | struct wa_xfer *xfer; | |
1927 | struct wa_seg *seg; | |
1928 | struct wa_rpipe *rpipe; | |
14e1d2df | 1929 | unsigned cnt, done = 0, xfer_abort_pending; |
df365423 | 1930 | unsigned rpipe_ready = 0; |
b374487e TP |
1931 | int result; |
1932 | ||
1933 | /* check if it is safe to unlink. */ | |
1934 | spin_lock_irqsave(&wa->xfer_list_lock, flags); | |
1935 | result = usb_hcd_check_unlink_urb(&(wa->wusb->usb_hcd), urb, status); | |
5da43afc TP |
1936 | if ((result == 0) && urb->hcpriv) { |
1937 | /* | |
1938 | * Get a xfer ref to prevent a race with wa_xfer_giveback | |
1939 | * cleaning up the xfer while we are working with it. | |
1940 | */ | |
1941 | wa_xfer_get(urb->hcpriv); | |
1942 | } | |
b374487e TP |
1943 | spin_unlock_irqrestore(&wa->xfer_list_lock, flags); |
1944 | if (result) | |
1945 | return result; | |
df365423 | 1946 | |
df365423 | 1947 | xfer = urb->hcpriv; |
5da43afc TP |
1948 | if (xfer == NULL) |
1949 | return -ENOENT; | |
df365423 | 1950 | spin_lock_irqsave(&xfer->lock, flags); |
14e1d2df | 1951 | pr_debug("%s: DEQUEUE xfer id 0x%08X\n", __func__, wa_xfer_id(xfer)); |
df365423 | 1952 | rpipe = xfer->ep->hcpriv; |
ec58fad1 | 1953 | if (rpipe == NULL) { |
bbfc3420 TP |
1954 | pr_debug("%s: xfer %p id 0x%08X has no RPIPE. %s", |
1955 | __func__, xfer, wa_xfer_id(xfer), | |
ec58fad1 | 1956 | "Probably already aborted.\n" ); |
e05a1fd9 | 1957 | result = -ENOENT; |
ec58fad1 TP |
1958 | goto out_unlock; |
1959 | } | |
5da43afc TP |
1960 | /* |
1961 | * Check for done to avoid racing with wa_xfer_giveback and completing | |
1962 | * twice. | |
1963 | */ | |
1964 | if (__wa_xfer_is_done(xfer)) { | |
1965 | pr_debug("%s: xfer %p id 0x%08X already done.\n", __func__, | |
1966 | xfer, wa_xfer_id(xfer)); | |
1967 | result = -ENOENT; | |
1968 | goto out_unlock; | |
1969 | } | |
df365423 IPG |
1970 | /* Check the delayed list -> if there, release and complete */ |
1971 | spin_lock_irqsave(&wa->xfer_list_lock, flags2); | |
1972 | if (!list_empty(&xfer->list_node) && xfer->seg == NULL) | |
1973 | goto dequeue_delayed; | |
1974 | spin_unlock_irqrestore(&wa->xfer_list_lock, flags2); | |
1975 | if (xfer->seg == NULL) /* still hasn't reached */ | |
1976 | goto out_unlock; /* setup(), enqueue_b() completes */ | |
1977 | /* Ok, the xfer is in flight already, it's been setup and submitted.*/ | |
14e1d2df | 1978 | xfer_abort_pending = __wa_xfer_abort(xfer) >= 0; |
df365423 IPG |
1979 | for (cnt = 0; cnt < xfer->segs; cnt++) { |
1980 | seg = xfer->seg[cnt]; | |
14e1d2df TP |
1981 | pr_debug("%s: xfer id 0x%08X#%d status = %d\n", |
1982 | __func__, wa_xfer_id(xfer), cnt, seg->status); | |
df365423 IPG |
1983 | switch (seg->status) { |
1984 | case WA_SEG_NOTREADY: | |
1985 | case WA_SEG_READY: | |
1986 | printk(KERN_ERR "xfer %p#%u: dequeue bad state %u\n", | |
1987 | xfer, cnt, seg->status); | |
1988 | WARN_ON(1); | |
1989 | break; | |
1990 | case WA_SEG_DELAYED: | |
14e1d2df TP |
1991 | /* |
1992 | * delete from rpipe delayed list. If no segments on | |
1993 | * this xfer have been submitted, __wa_xfer_is_done will | |
1994 | * trigger a giveback below. Otherwise, the submitted | |
1995 | * segments will be completed in the DTI interrupt. | |
1996 | */ | |
df365423 | 1997 | seg->status = WA_SEG_ABORTED; |
e05a1fd9 | 1998 | seg->result = -ENOENT; |
df365423 IPG |
1999 | spin_lock_irqsave(&rpipe->seg_lock, flags2); |
2000 | list_del(&seg->list_node); | |
2001 | xfer->segs_done++; | |
df365423 IPG |
2002 | spin_unlock_irqrestore(&rpipe->seg_lock, flags2); |
2003 | break; | |
df365423 IPG |
2004 | case WA_SEG_DONE: |
2005 | case WA_SEG_ERROR: | |
2006 | case WA_SEG_ABORTED: | |
2007 | break; | |
14e1d2df TP |
2008 | /* |
2009 | * In the states below, the HWA device already knows | |
2010 | * about the transfer. If an abort request was sent, | |
2011 | * allow the HWA to process it and wait for the | |
2012 | * results. Otherwise, the DTI state and seg completed | |
2013 | * counts can get out of sync. | |
2014 | */ | |
2015 | case WA_SEG_SUBMITTED: | |
2016 | case WA_SEG_PENDING: | |
2017 | case WA_SEG_DTI_PENDING: | |
2018 | /* | |
2019 | * Check if the abort was successfully sent. This could | |
2020 | * be false if the HWA has been removed but we haven't | |
2021 | * gotten the disconnect notification yet. | |
2022 | */ | |
2023 | if (!xfer_abort_pending) { | |
2024 | seg->status = WA_SEG_ABORTED; | |
2025 | rpipe_ready = rpipe_avail_inc(rpipe); | |
2026 | xfer->segs_done++; | |
2027 | } | |
2028 | break; | |
df365423 IPG |
2029 | } |
2030 | } | |
2031 | xfer->result = urb->status; /* -ENOENT or -ECONNRESET */ | |
14e1d2df | 2032 | done = __wa_xfer_is_done(xfer); |
df365423 | 2033 | spin_unlock_irqrestore(&xfer->lock, flags); |
14e1d2df TP |
2034 | if (done) |
2035 | wa_xfer_completion(xfer); | |
df365423 IPG |
2036 | if (rpipe_ready) |
2037 | wa_xfer_delayed_run(rpipe); | |
5da43afc | 2038 | wa_xfer_put(xfer); |
e05a1fd9 | 2039 | return result; |
df365423 IPG |
2040 | |
2041 | out_unlock: | |
2042 | spin_unlock_irqrestore(&xfer->lock, flags); | |
5da43afc | 2043 | wa_xfer_put(xfer); |
e05a1fd9 | 2044 | return result; |
df365423 IPG |
2045 | |
2046 | dequeue_delayed: | |
2047 | list_del_init(&xfer->list_node); | |
2048 | spin_unlock_irqrestore(&wa->xfer_list_lock, flags2); | |
2049 | xfer->result = urb->status; | |
2050 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2051 | wa_xfer_giveback(xfer); | |
5da43afc | 2052 | wa_xfer_put(xfer); |
df365423 | 2053 | usb_put_urb(urb); /* we got a ref in enqueue() */ |
df365423 IPG |
2054 | return 0; |
2055 | } | |
2056 | EXPORT_SYMBOL_GPL(wa_urb_dequeue); | |
2057 | ||
2058 | /* | |
2059 | * Translation from WA status codes (WUSB1.0 Table 8.15) to errno | |
2060 | * codes | |
2061 | * | |
2062 | * Positive errno values are internal inconsistencies and should be | |
2063 | * flagged louder. Negative are to be passed up to the user in the | |
2064 | * normal way. | |
2065 | * | |
2066 | * @status: USB WA status code -- high two bits are stripped. | |
2067 | */ | |
2068 | static int wa_xfer_status_to_errno(u8 status) | |
2069 | { | |
2070 | int errno; | |
2071 | u8 real_status = status; | |
2072 | static int xlat[] = { | |
2073 | [WA_XFER_STATUS_SUCCESS] = 0, | |
2074 | [WA_XFER_STATUS_HALTED] = -EPIPE, | |
2075 | [WA_XFER_STATUS_DATA_BUFFER_ERROR] = -ENOBUFS, | |
2076 | [WA_XFER_STATUS_BABBLE] = -EOVERFLOW, | |
2077 | [WA_XFER_RESERVED] = EINVAL, | |
2078 | [WA_XFER_STATUS_NOT_FOUND] = 0, | |
2079 | [WA_XFER_STATUS_INSUFFICIENT_RESOURCE] = -ENOMEM, | |
2080 | [WA_XFER_STATUS_TRANSACTION_ERROR] = -EILSEQ, | |
e05a1fd9 | 2081 | [WA_XFER_STATUS_ABORTED] = -ENOENT, |
df365423 IPG |
2082 | [WA_XFER_STATUS_RPIPE_NOT_READY] = EINVAL, |
2083 | [WA_XFER_INVALID_FORMAT] = EINVAL, | |
2084 | [WA_XFER_UNEXPECTED_SEGMENT_NUMBER] = EINVAL, | |
2085 | [WA_XFER_STATUS_RPIPE_TYPE_MISMATCH] = EINVAL, | |
2086 | }; | |
2087 | status &= 0x3f; | |
2088 | ||
2089 | if (status == 0) | |
2090 | return 0; | |
2091 | if (status >= ARRAY_SIZE(xlat)) { | |
9708cd2f | 2092 | printk_ratelimited(KERN_ERR "%s(): BUG? " |
df365423 IPG |
2093 | "Unknown WA transfer status 0x%02x\n", |
2094 | __func__, real_status); | |
2095 | return -EINVAL; | |
2096 | } | |
2097 | errno = xlat[status]; | |
2098 | if (unlikely(errno > 0)) { | |
9708cd2f | 2099 | printk_ratelimited(KERN_ERR "%s(): BUG? " |
df365423 IPG |
2100 | "Inconsistent WA status: 0x%02x\n", |
2101 | __func__, real_status); | |
2102 | errno = -errno; | |
2103 | } | |
2104 | return errno; | |
2105 | } | |
2106 | ||
14e1d2df TP |
2107 | /* |
2108 | * If a last segment flag and/or a transfer result error is encountered, | |
2109 | * no other segment transfer results will be returned from the device. | |
2110 | * Mark the remaining submitted or pending xfers as completed so that | |
2111 | * the xfer will complete cleanly. | |
acfadcea TP |
2112 | * |
2113 | * xfer->lock must be held | |
2114 | * | |
14e1d2df TP |
2115 | */ |
2116 | static void wa_complete_remaining_xfer_segs(struct wa_xfer *xfer, | |
acfadcea | 2117 | int starting_index, enum wa_seg_status status) |
14e1d2df TP |
2118 | { |
2119 | int index; | |
2120 | struct wa_rpipe *rpipe = xfer->ep->hcpriv; | |
2121 | ||
acfadcea | 2122 | for (index = starting_index; index < xfer->segs_submitted; index++) { |
14e1d2df TP |
2123 | struct wa_seg *current_seg = xfer->seg[index]; |
2124 | ||
2125 | BUG_ON(current_seg == NULL); | |
2126 | ||
2127 | switch (current_seg->status) { | |
2128 | case WA_SEG_SUBMITTED: | |
2129 | case WA_SEG_PENDING: | |
2130 | case WA_SEG_DTI_PENDING: | |
2131 | rpipe_avail_inc(rpipe); | |
2132 | /* | |
2133 | * do not increment RPIPE avail for the WA_SEG_DELAYED case | |
2134 | * since it has not been submitted to the RPIPE. | |
2135 | */ | |
2136 | case WA_SEG_DELAYED: | |
2137 | xfer->segs_done++; | |
7005234c | 2138 | current_seg->status = status; |
14e1d2df TP |
2139 | break; |
2140 | case WA_SEG_ABORTED: | |
2141 | break; | |
2142 | default: | |
2143 | WARN(1, "%s: xfer 0x%08X#%d. bad seg status = %d\n", | |
2144 | __func__, wa_xfer_id(xfer), index, | |
2145 | current_seg->status); | |
2146 | break; | |
2147 | } | |
2148 | } | |
2149 | } | |
2150 | ||
226b3a2e TP |
2151 | /* Populate the wa->buf_in_urb based on the current isoc transfer state. */ |
2152 | static void __wa_populate_buf_in_urb_isoc(struct wahc *wa, struct wa_xfer *xfer, | |
2153 | struct wa_seg *seg, int curr_iso_frame) | |
2154 | { | |
2155 | BUG_ON(wa->buf_in_urb->status == -EINPROGRESS); | |
2156 | ||
2157 | /* this should always be 0 before a resubmit. */ | |
2158 | wa->buf_in_urb->num_mapped_sgs = 0; | |
2159 | wa->buf_in_urb->transfer_dma = xfer->urb->transfer_dma + | |
2160 | xfer->urb->iso_frame_desc[curr_iso_frame].offset; | |
2161 | wa->buf_in_urb->transfer_buffer_length = | |
ecf3701c | 2162 | xfer->urb->iso_frame_desc[curr_iso_frame].actual_length; |
226b3a2e TP |
2163 | wa->buf_in_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
2164 | wa->buf_in_urb->transfer_buffer = NULL; | |
2165 | wa->buf_in_urb->sg = NULL; | |
2166 | wa->buf_in_urb->num_sgs = 0; | |
2167 | wa->buf_in_urb->context = seg; | |
2168 | } | |
2169 | ||
7005234c TP |
2170 | /* Populate the wa->buf_in_urb based on the current transfer state. */ |
2171 | static int wa_populate_buf_in_urb(struct wahc *wa, struct wa_xfer *xfer, | |
2172 | unsigned int seg_idx, unsigned int bytes_transferred) | |
2173 | { | |
2174 | int result = 0; | |
2175 | struct wa_seg *seg = xfer->seg[seg_idx]; | |
2176 | ||
2177 | BUG_ON(wa->buf_in_urb->status == -EINPROGRESS); | |
2178 | /* this should always be 0 before a resubmit. */ | |
2179 | wa->buf_in_urb->num_mapped_sgs = 0; | |
2180 | ||
2181 | if (xfer->is_dma) { | |
2182 | wa->buf_in_urb->transfer_dma = xfer->urb->transfer_dma | |
2183 | + (seg_idx * xfer->seg_size); | |
2184 | wa->buf_in_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
2185 | wa->buf_in_urb->transfer_buffer = NULL; | |
2186 | wa->buf_in_urb->sg = NULL; | |
2187 | wa->buf_in_urb->num_sgs = 0; | |
2188 | } else { | |
2189 | /* do buffer or SG processing. */ | |
2190 | wa->buf_in_urb->transfer_flags &= ~URB_NO_TRANSFER_DMA_MAP; | |
2191 | ||
2192 | if (xfer->urb->transfer_buffer) { | |
2193 | wa->buf_in_urb->transfer_buffer = | |
2194 | xfer->urb->transfer_buffer | |
2195 | + (seg_idx * xfer->seg_size); | |
2196 | wa->buf_in_urb->sg = NULL; | |
2197 | wa->buf_in_urb->num_sgs = 0; | |
2198 | } else { | |
2199 | /* allocate an SG list to store seg_size bytes | |
2200 | and copy the subset of the xfer->urb->sg | |
2201 | that matches the buffer subset we are | |
2202 | about to read. */ | |
2203 | wa->buf_in_urb->sg = wa_xfer_create_subset_sg( | |
2204 | xfer->urb->sg, | |
2205 | seg_idx * xfer->seg_size, | |
2206 | bytes_transferred, | |
2207 | &(wa->buf_in_urb->num_sgs)); | |
2208 | ||
2209 | if (!(wa->buf_in_urb->sg)) { | |
2210 | wa->buf_in_urb->num_sgs = 0; | |
2211 | result = -ENOMEM; | |
2212 | } | |
2213 | wa->buf_in_urb->transfer_buffer = NULL; | |
2214 | } | |
2215 | } | |
2216 | wa->buf_in_urb->transfer_buffer_length = bytes_transferred; | |
2217 | wa->buf_in_urb->context = seg; | |
2218 | ||
2219 | return result; | |
2220 | } | |
2221 | ||
df365423 IPG |
2222 | /* |
2223 | * Process a xfer result completion message | |
2224 | * | |
14e1d2df | 2225 | * inbound transfers: need to schedule a buf_in_urb read |
df365423 | 2226 | * |
6d33f7bb | 2227 | * FIXME: this function needs to be broken up in parts |
df365423 | 2228 | */ |
0367eef2 TP |
2229 | static void wa_xfer_result_chew(struct wahc *wa, struct wa_xfer *xfer, |
2230 | struct wa_xfer_result *xfer_result) | |
df365423 IPG |
2231 | { |
2232 | int result; | |
2233 | struct device *dev = &wa->usb_iface->dev; | |
2234 | unsigned long flags; | |
7005234c | 2235 | unsigned int seg_idx; |
df365423 IPG |
2236 | struct wa_seg *seg; |
2237 | struct wa_rpipe *rpipe; | |
0367eef2 | 2238 | unsigned done = 0; |
df365423 IPG |
2239 | u8 usb_status; |
2240 | unsigned rpipe_ready = 0; | |
7005234c | 2241 | unsigned bytes_transferred = le32_to_cpu(xfer_result->dwTransferLength); |
df365423 | 2242 | |
df365423 IPG |
2243 | spin_lock_irqsave(&xfer->lock, flags); |
2244 | seg_idx = xfer_result->bTransferSegment & 0x7f; | |
2245 | if (unlikely(seg_idx >= xfer->segs)) | |
2246 | goto error_bad_seg; | |
2247 | seg = xfer->seg[seg_idx]; | |
2248 | rpipe = xfer->ep->hcpriv; | |
2249 | usb_status = xfer_result->bTransferStatus; | |
b9c84be6 TP |
2250 | dev_dbg(dev, "xfer %p ID 0x%08X#%u: bTransferStatus 0x%02x (seg status %u)\n", |
2251 | xfer, wa_xfer_id(xfer), seg_idx, usb_status, seg->status); | |
df365423 IPG |
2252 | if (seg->status == WA_SEG_ABORTED |
2253 | || seg->status == WA_SEG_ERROR) /* already handled */ | |
2254 | goto segment_aborted; | |
2255 | if (seg->status == WA_SEG_SUBMITTED) /* ops, got here */ | |
2256 | seg->status = WA_SEG_PENDING; /* before wa_seg{_dto}_cb() */ | |
2257 | if (seg->status != WA_SEG_PENDING) { | |
2258 | if (printk_ratelimit()) | |
2259 | dev_err(dev, "xfer %p#%u: Bad segment state %u\n", | |
2260 | xfer, seg_idx, seg->status); | |
2261 | seg->status = WA_SEG_PENDING; /* workaround/"fix" it */ | |
2262 | } | |
2263 | if (usb_status & 0x80) { | |
2264 | seg->result = wa_xfer_status_to_errno(usb_status); | |
2b81c083 TP |
2265 | dev_err(dev, "DTI: xfer %p#:%08X:%u failed (0x%02x)\n", |
2266 | xfer, xfer->id, seg->index, usb_status); | |
14e1d2df TP |
2267 | seg->status = ((usb_status & 0x7F) == WA_XFER_STATUS_ABORTED) ? |
2268 | WA_SEG_ABORTED : WA_SEG_ERROR; | |
df365423 IPG |
2269 | goto error_complete; |
2270 | } | |
2271 | /* FIXME: we ignore warnings, tally them for stats */ | |
2272 | if (usb_status & 0x40) /* Warning?... */ | |
2273 | usb_status = 0; /* ... pass */ | |
7005234c TP |
2274 | /* |
2275 | * If the last segment bit is set, complete the remaining segments. | |
2276 | * When the current segment is completed, either in wa_buf_in_cb for | |
2277 | * transfers with data or below for no data, the xfer will complete. | |
2278 | */ | |
2279 | if (xfer_result->bTransferSegment & 0x80) | |
acfadcea TP |
2280 | wa_complete_remaining_xfer_segs(xfer, seg->index + 1, |
2281 | WA_SEG_DONE); | |
226b3a2e TP |
2282 | if (usb_pipeisoc(xfer->urb->pipe) |
2283 | && (le32_to_cpu(xfer_result->dwNumOfPackets) > 0)) { | |
7a32d9be TP |
2284 | /* set up WA state to read the isoc packet status next. */ |
2285 | wa->dti_isoc_xfer_in_progress = wa_xfer_id(xfer); | |
2286 | wa->dti_isoc_xfer_seg = seg_idx; | |
2287 | wa->dti_state = WA_DTI_ISOC_PACKET_STATUS_PENDING; | |
226b3a2e | 2288 | } else if (xfer->is_inbound && !usb_pipeisoc(xfer->urb->pipe) |
7005234c TP |
2289 | && (bytes_transferred > 0)) { |
2290 | /* IN data phase: read to buffer */ | |
df365423 | 2291 | seg->status = WA_SEG_DTI_PENDING; |
7005234c TP |
2292 | result = wa_populate_buf_in_urb(wa, xfer, seg_idx, |
2293 | bytes_transferred); | |
2294 | if (result < 0) | |
2295 | goto error_buf_in_populate; | |
df365423 IPG |
2296 | result = usb_submit_urb(wa->buf_in_urb, GFP_ATOMIC); |
2297 | if (result < 0) | |
2298 | goto error_submit_buf_in; | |
2299 | } else { | |
7005234c | 2300 | /* OUT data phase or no data, complete it -- */ |
7005234c | 2301 | seg->result = bytes_transferred; |
df365423 | 2302 | rpipe_ready = rpipe_avail_inc(rpipe); |
e500d526 | 2303 | done = __wa_xfer_mark_seg_as_done(xfer, seg, WA_SEG_DONE); |
df365423 IPG |
2304 | } |
2305 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2306 | if (done) | |
2307 | wa_xfer_completion(xfer); | |
2308 | if (rpipe_ready) | |
2309 | wa_xfer_delayed_run(rpipe); | |
df365423 IPG |
2310 | return; |
2311 | ||
df365423 IPG |
2312 | error_submit_buf_in: |
2313 | if (edc_inc(&wa->dti_edc, EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) { | |
2314 | dev_err(dev, "DTI: URB max acceptable errors " | |
2315 | "exceeded, resetting device\n"); | |
2316 | wa_reset_all(wa); | |
2317 | } | |
2318 | if (printk_ratelimit()) | |
2319 | dev_err(dev, "xfer %p#%u: can't submit DTI data phase: %d\n", | |
2320 | xfer, seg_idx, result); | |
2321 | seg->result = result; | |
2b81c083 | 2322 | kfree(wa->buf_in_urb->sg); |
6741448e | 2323 | wa->buf_in_urb->sg = NULL; |
7005234c | 2324 | error_buf_in_populate: |
6d33f7bb | 2325 | __wa_xfer_abort(xfer); |
df365423 | 2326 | seg->status = WA_SEG_ERROR; |
14e1d2df | 2327 | error_complete: |
df365423 IPG |
2328 | xfer->segs_done++; |
2329 | rpipe_ready = rpipe_avail_inc(rpipe); | |
acfadcea | 2330 | wa_complete_remaining_xfer_segs(xfer, seg->index + 1, seg->status); |
df365423 | 2331 | done = __wa_xfer_is_done(xfer); |
6d33f7bb TP |
2332 | /* |
2333 | * queue work item to clear STALL for control endpoints. | |
2334 | * Otherwise, let endpoint_reset take care of it. | |
2335 | */ | |
2336 | if (((usb_status & 0x3f) == WA_XFER_STATUS_HALTED) && | |
2337 | usb_endpoint_xfer_control(&xfer->ep->desc) && | |
2338 | done) { | |
2339 | ||
2340 | dev_info(dev, "Control EP stall. Queue delayed work.\n"); | |
2341 | spin_lock_irq(&wa->xfer_list_lock); | |
8eb41299 WY |
2342 | /* move xfer from xfer_list to xfer_errored_list. */ |
2343 | list_move_tail(&xfer->list_node, &wa->xfer_errored_list); | |
6d33f7bb TP |
2344 | spin_unlock_irq(&wa->xfer_list_lock); |
2345 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2346 | queue_work(wusbd, &wa->xfer_error_work); | |
2347 | } else { | |
2348 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2349 | if (done) | |
2350 | wa_xfer_completion(xfer); | |
2351 | if (rpipe_ready) | |
2352 | wa_xfer_delayed_run(rpipe); | |
2353 | } | |
2354 | ||
df365423 IPG |
2355 | return; |
2356 | ||
df365423 IPG |
2357 | error_bad_seg: |
2358 | spin_unlock_irqrestore(&xfer->lock, flags); | |
b374487e | 2359 | wa_urb_dequeue(wa, xfer->urb, -ENOENT); |
df365423 IPG |
2360 | if (printk_ratelimit()) |
2361 | dev_err(dev, "xfer %p#%u: bad segment\n", xfer, seg_idx); | |
2362 | if (edc_inc(&wa->dti_edc, EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) { | |
2363 | dev_err(dev, "DTI: URB max acceptable errors " | |
2364 | "exceeded, resetting device\n"); | |
2365 | wa_reset_all(wa); | |
2366 | } | |
df365423 IPG |
2367 | return; |
2368 | ||
df365423 IPG |
2369 | segment_aborted: |
2370 | /* nothing to do, as the aborter did the completion */ | |
2371 | spin_unlock_irqrestore(&xfer->lock, flags); | |
df365423 IPG |
2372 | } |
2373 | ||
7a32d9be TP |
2374 | /* |
2375 | * Process a isochronous packet status message | |
2376 | * | |
2377 | * inbound transfers: need to schedule a buf_in_urb read | |
2378 | */ | |
226b3a2e | 2379 | static int wa_process_iso_packet_status(struct wahc *wa, struct urb *urb) |
7a32d9be TP |
2380 | { |
2381 | struct device *dev = &wa->usb_iface->dev; | |
2382 | struct wa_xfer_packet_status_hwaiso *packet_status; | |
2101242c | 2383 | struct wa_xfer_packet_status_len_hwaiso *status_array; |
7a32d9be TP |
2384 | struct wa_xfer *xfer; |
2385 | unsigned long flags; | |
2386 | struct wa_seg *seg; | |
2387 | struct wa_rpipe *rpipe; | |
226b3a2e TP |
2388 | unsigned done = 0, dti_busy = 0, data_frame_count = 0, seg_index; |
2389 | unsigned first_frame_index = 0, rpipe_ready = 0; | |
2101242c | 2390 | int expected_size; |
7a32d9be TP |
2391 | |
2392 | /* We have a xfer result buffer; check it */ | |
2393 | dev_dbg(dev, "DTI: isoc packet status %d bytes at %p\n", | |
2394 | urb->actual_length, urb->transfer_buffer); | |
7a32d9be | 2395 | packet_status = (struct wa_xfer_packet_status_hwaiso *)(wa->dti_buf); |
7a32d9be TP |
2396 | if (packet_status->bPacketType != WA_XFER_ISO_PACKET_STATUS) { |
2397 | dev_err(dev, "DTI Error: isoc packet status--bad type 0x%02x\n", | |
2398 | packet_status->bPacketType); | |
2399 | goto error_parse_buffer; | |
2400 | } | |
2401 | xfer = wa_xfer_get_by_id(wa, wa->dti_isoc_xfer_in_progress); | |
2402 | if (xfer == NULL) { | |
2403 | dev_err(dev, "DTI Error: isoc packet status--unknown xfer 0x%08x\n", | |
2404 | wa->dti_isoc_xfer_in_progress); | |
2405 | goto error_parse_buffer; | |
2406 | } | |
2407 | spin_lock_irqsave(&xfer->lock, flags); | |
2408 | if (unlikely(wa->dti_isoc_xfer_seg >= xfer->segs)) | |
2409 | goto error_bad_seg; | |
2410 | seg = xfer->seg[wa->dti_isoc_xfer_seg]; | |
2411 | rpipe = xfer->ep->hcpriv; | |
2101242c TP |
2412 | expected_size = sizeof(*packet_status) + |
2413 | (sizeof(packet_status->PacketStatus[0]) * | |
2414 | seg->isoc_frame_count); | |
2415 | if (urb->actual_length != expected_size) { | |
2416 | dev_err(dev, "DTI Error: isoc packet status--bad urb length (%d bytes vs %d needed)\n", | |
2417 | urb->actual_length, expected_size); | |
2418 | goto error_bad_seg; | |
2419 | } | |
2420 | if (le16_to_cpu(packet_status->wLength) != expected_size) { | |
2421 | dev_err(dev, "DTI Error: isoc packet status--bad length %u\n", | |
2422 | le16_to_cpu(packet_status->wLength)); | |
2423 | goto error_bad_seg; | |
2424 | } | |
226b3a2e | 2425 | /* write isoc packet status and lengths back to the xfer urb. */ |
2101242c | 2426 | status_array = packet_status->PacketStatus; |
226b3a2e TP |
2427 | xfer->urb->start_frame = |
2428 | wa->wusb->usb_hcd.driver->get_frame_number(&wa->wusb->usb_hcd); | |
2101242c | 2429 | for (seg_index = 0; seg_index < seg->isoc_frame_count; ++seg_index) { |
226b3a2e TP |
2430 | struct usb_iso_packet_descriptor *iso_frame_desc = |
2431 | xfer->urb->iso_frame_desc; | |
2432 | const int urb_frame_index = | |
2433 | seg->isoc_frame_offset + seg_index; | |
2434 | ||
2435 | iso_frame_desc[urb_frame_index].status = | |
2101242c TP |
2436 | wa_xfer_status_to_errno( |
2437 | le16_to_cpu(status_array[seg_index].PacketStatus)); | |
226b3a2e | 2438 | iso_frame_desc[urb_frame_index].actual_length = |
2101242c | 2439 | le16_to_cpu(status_array[seg_index].PacketLength); |
226b3a2e TP |
2440 | /* track the number of frames successfully transferred. */ |
2441 | if (iso_frame_desc[urb_frame_index].actual_length > 0) { | |
2442 | /* save the starting frame index for buf_in_urb. */ | |
2443 | if (!data_frame_count) | |
2444 | first_frame_index = seg_index; | |
2445 | ++data_frame_count; | |
2446 | } | |
2101242c | 2447 | } |
7a32d9be | 2448 | |
226b3a2e TP |
2449 | if (xfer->is_inbound && data_frame_count) { |
2450 | int result; | |
2451 | ||
2452 | seg->isoc_frame_index = first_frame_index; | |
2453 | /* submit a read URB for the first frame with data. */ | |
2454 | __wa_populate_buf_in_urb_isoc(wa, xfer, seg, | |
2455 | seg->isoc_frame_index + seg->isoc_frame_offset); | |
2456 | ||
2457 | result = usb_submit_urb(wa->buf_in_urb, GFP_ATOMIC); | |
2458 | if (result < 0) { | |
2459 | dev_err(dev, "DTI Error: Could not submit buf in URB (%d)", | |
2460 | result); | |
2461 | wa_reset_all(wa); | |
2462 | } else if (data_frame_count > 1) | |
2463 | /* If we need to read multiple frames, set DTI busy. */ | |
2464 | dti_busy = 1; | |
2465 | } else { | |
2466 | /* OUT transfer or no more IN data, complete it -- */ | |
7a32d9be | 2467 | rpipe_ready = rpipe_avail_inc(rpipe); |
e500d526 | 2468 | done = __wa_xfer_mark_seg_as_done(xfer, seg, WA_SEG_DONE); |
7a32d9be TP |
2469 | } |
2470 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2471 | wa->dti_state = WA_DTI_TRANSFER_RESULT_PENDING; | |
2472 | if (done) | |
2473 | wa_xfer_completion(xfer); | |
2474 | if (rpipe_ready) | |
2475 | wa_xfer_delayed_run(rpipe); | |
2476 | wa_xfer_put(xfer); | |
226b3a2e | 2477 | return dti_busy; |
7a32d9be TP |
2478 | |
2479 | error_bad_seg: | |
2480 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2481 | wa_xfer_put(xfer); | |
2482 | error_parse_buffer: | |
226b3a2e | 2483 | return dti_busy; |
7a32d9be TP |
2484 | } |
2485 | ||
df365423 IPG |
2486 | /* |
2487 | * Callback for the IN data phase | |
2488 | * | |
af901ca1 | 2489 | * If successful transition state; otherwise, take a note of the |
df365423 IPG |
2490 | * error, mark this segment done and try completion. |
2491 | * | |
2492 | * Note we don't access until we are sure that the transfer hasn't | |
2493 | * been cancelled (ECONNRESET, ENOENT), which could mean that | |
2494 | * seg->xfer could be already gone. | |
2495 | */ | |
2496 | static void wa_buf_in_cb(struct urb *urb) | |
2497 | { | |
2498 | struct wa_seg *seg = urb->context; | |
2499 | struct wa_xfer *xfer = seg->xfer; | |
2500 | struct wahc *wa; | |
2501 | struct device *dev; | |
2502 | struct wa_rpipe *rpipe; | |
226b3a2e | 2503 | unsigned rpipe_ready = 0, seg_index, isoc_data_frame_count = 0; |
df365423 IPG |
2504 | unsigned long flags; |
2505 | u8 done = 0; | |
2506 | ||
2b81c083 TP |
2507 | /* free the sg if it was used. */ |
2508 | kfree(urb->sg); | |
2509 | urb->sg = NULL; | |
2510 | ||
226b3a2e TP |
2511 | spin_lock_irqsave(&xfer->lock, flags); |
2512 | wa = xfer->wa; | |
2513 | dev = &wa->usb_iface->dev; | |
2514 | ||
2515 | if (usb_pipeisoc(xfer->urb->pipe)) { | |
2516 | /* | |
2517 | * Find the next isoc frame with data. Bail out after | |
2518 | * isoc_data_frame_count > 1 since there is no need to walk | |
2519 | * the entire frame array. We just need to know if | |
2520 | * isoc_data_frame_count is 0, 1, or >1. | |
2521 | */ | |
2522 | seg_index = seg->isoc_frame_index + 1; | |
2523 | while ((seg_index < seg->isoc_frame_count) | |
2524 | && (isoc_data_frame_count <= 1)) { | |
2525 | struct usb_iso_packet_descriptor *iso_frame_desc = | |
2526 | xfer->urb->iso_frame_desc; | |
2527 | const int urb_frame_index = | |
2528 | seg->isoc_frame_offset + seg_index; | |
2529 | ||
2530 | if (iso_frame_desc[urb_frame_index].actual_length > 0) { | |
2531 | /* save the index of the next frame with data */ | |
2532 | if (!isoc_data_frame_count) | |
2533 | seg->isoc_frame_index = seg_index; | |
2534 | ++isoc_data_frame_count; | |
2535 | } | |
2536 | ++seg_index; | |
2537 | } | |
2538 | } | |
2539 | spin_unlock_irqrestore(&xfer->lock, flags); | |
2540 | ||
df365423 IPG |
2541 | switch (urb->status) { |
2542 | case 0: | |
2543 | spin_lock_irqsave(&xfer->lock, flags); | |
226b3a2e TP |
2544 | |
2545 | seg->result += urb->actual_length; | |
2546 | if (isoc_data_frame_count > 0) { | |
2547 | int result; | |
2548 | /* submit a read URB for the first frame with data. */ | |
2549 | __wa_populate_buf_in_urb_isoc(wa, xfer, seg, | |
2550 | seg->isoc_frame_index + seg->isoc_frame_offset); | |
2551 | result = usb_submit_urb(wa->buf_in_urb, GFP_ATOMIC); | |
2552 | if (result < 0) { | |
2553 | dev_err(dev, "DTI Error: Could not submit buf in URB (%d)", | |
2554 | result); | |
2555 | wa_reset_all(wa); | |
2556 | } | |
2557 | } else { | |
2558 | rpipe = xfer->ep->hcpriv; | |
226b3a2e TP |
2559 | dev_dbg(dev, "xfer %p#%u: data in done (%zu bytes)\n", |
2560 | xfer, seg->index, seg->result); | |
226b3a2e | 2561 | rpipe_ready = rpipe_avail_inc(rpipe); |
e500d526 TP |
2562 | done = __wa_xfer_mark_seg_as_done(xfer, seg, |
2563 | WA_SEG_DONE); | |
226b3a2e | 2564 | } |
df365423 IPG |
2565 | spin_unlock_irqrestore(&xfer->lock, flags); |
2566 | if (done) | |
2567 | wa_xfer_completion(xfer); | |
2568 | if (rpipe_ready) | |
2569 | wa_xfer_delayed_run(rpipe); | |
2570 | break; | |
2571 | case -ECONNRESET: /* URB unlinked; no need to do anything */ | |
2572 | case -ENOENT: /* as it was done by the who unlinked us */ | |
2573 | break; | |
2574 | default: /* Other errors ... */ | |
2575 | spin_lock_irqsave(&xfer->lock, flags); | |
df365423 IPG |
2576 | rpipe = xfer->ep->hcpriv; |
2577 | if (printk_ratelimit()) | |
2578 | dev_err(dev, "xfer %p#%u: data in error %d\n", | |
2579 | xfer, seg->index, urb->status); | |
2580 | if (edc_inc(&wa->nep_edc, EDC_MAX_ERRORS, | |
2581 | EDC_ERROR_TIMEFRAME)){ | |
2582 | dev_err(dev, "DTO: URB max acceptable errors " | |
2583 | "exceeded, resetting device\n"); | |
2584 | wa_reset_all(wa); | |
2585 | } | |
df365423 | 2586 | seg->result = urb->status; |
df365423 IPG |
2587 | rpipe_ready = rpipe_avail_inc(rpipe); |
2588 | __wa_xfer_abort(xfer); | |
e500d526 | 2589 | done = __wa_xfer_mark_seg_as_done(xfer, seg, WA_SEG_ERROR); |
df365423 IPG |
2590 | spin_unlock_irqrestore(&xfer->lock, flags); |
2591 | if (done) | |
2592 | wa_xfer_completion(xfer); | |
2593 | if (rpipe_ready) | |
2594 | wa_xfer_delayed_run(rpipe); | |
2595 | } | |
226b3a2e TP |
2596 | /* |
2597 | * If we are in this callback and isoc_data_frame_count > 0, it means | |
2598 | * that the dti_urb submission was delayed in wa_dti_cb. Once | |
2599 | * isoc_data_frame_count gets to 1, we can submit the deferred URB | |
2600 | * since the last buf_in_urb was just submitted. | |
2601 | */ | |
2602 | if (isoc_data_frame_count == 1) { | |
2603 | int result = usb_submit_urb(wa->dti_urb, GFP_ATOMIC); | |
2604 | if (result < 0) { | |
2605 | dev_err(dev, "DTI Error: Could not submit DTI URB (%d)\n", | |
2606 | result); | |
2607 | wa_reset_all(wa); | |
2608 | } | |
2609 | } | |
df365423 IPG |
2610 | } |
2611 | ||
2612 | /* | |
2613 | * Handle an incoming transfer result buffer | |
2614 | * | |
2615 | * Given a transfer result buffer, it completes the transfer (possibly | |
2616 | * scheduling and buffer in read) and then resubmits the DTI URB for a | |
2617 | * new transfer result read. | |
2618 | * | |
2619 | * | |
2620 | * The xfer_result DTI URB state machine | |
2621 | * | |
2622 | * States: OFF | RXR (Read-Xfer-Result) | RBI (Read-Buffer-In) | |
2623 | * | |
2624 | * We start in OFF mode, the first xfer_result notification [through | |
2625 | * wa_handle_notif_xfer()] moves us to RXR by posting the DTI-URB to | |
2626 | * read. | |
2627 | * | |
2628 | * We receive a buffer -- if it is not a xfer_result, we complain and | |
2629 | * repost the DTI-URB. If it is a xfer_result then do the xfer seg | |
2630 | * request accounting. If it is an IN segment, we move to RBI and post | |
2631 | * a BUF-IN-URB to the right buffer. The BUF-IN-URB callback will | |
2632 | * repost the DTI-URB and move to RXR state. if there was no IN | |
2633 | * segment, it will repost the DTI-URB. | |
2634 | * | |
2635 | * We go back to OFF when we detect a ENOENT or ESHUTDOWN (or too many | |
2636 | * errors) in the URBs. | |
2637 | */ | |
0367eef2 | 2638 | static void wa_dti_cb(struct urb *urb) |
df365423 | 2639 | { |
226b3a2e | 2640 | int result, dti_busy = 0; |
df365423 IPG |
2641 | struct wahc *wa = urb->context; |
2642 | struct device *dev = &wa->usb_iface->dev; | |
df365423 | 2643 | u32 xfer_id; |
df365423 IPG |
2644 | u8 usb_status; |
2645 | ||
df365423 IPG |
2646 | BUG_ON(wa->dti_urb != urb); |
2647 | switch (wa->dti_urb->status) { | |
2648 | case 0: | |
7a32d9be TP |
2649 | if (wa->dti_state == WA_DTI_TRANSFER_RESULT_PENDING) { |
2650 | struct wa_xfer_result *xfer_result; | |
2651 | struct wa_xfer *xfer; | |
2652 | ||
2653 | /* We have a xfer result buffer; check it */ | |
2654 | dev_dbg(dev, "DTI: xfer result %d bytes at %p\n", | |
2655 | urb->actual_length, urb->transfer_buffer); | |
2656 | if (urb->actual_length != sizeof(*xfer_result)) { | |
2657 | dev_err(dev, "DTI Error: xfer result--bad size xfer result (%d bytes vs %zu needed)\n", | |
2658 | urb->actual_length, | |
2659 | sizeof(*xfer_result)); | |
2660 | break; | |
2661 | } | |
2662 | xfer_result = (struct wa_xfer_result *)(wa->dti_buf); | |
2663 | if (xfer_result->hdr.bLength != sizeof(*xfer_result)) { | |
2664 | dev_err(dev, "DTI Error: xfer result--bad header length %u\n", | |
2665 | xfer_result->hdr.bLength); | |
2666 | break; | |
2667 | } | |
2668 | if (xfer_result->hdr.bNotifyType != WA_XFER_RESULT) { | |
2669 | dev_err(dev, "DTI Error: xfer result--bad header type 0x%02x\n", | |
2670 | xfer_result->hdr.bNotifyType); | |
2671 | break; | |
2672 | } | |
2673 | usb_status = xfer_result->bTransferStatus & 0x3f; | |
2674 | if (usb_status == WA_XFER_STATUS_NOT_FOUND) | |
2675 | /* taken care of already */ | |
2676 | break; | |
2677 | xfer_id = le32_to_cpu(xfer_result->dwTransferID); | |
2678 | xfer = wa_xfer_get_by_id(wa, xfer_id); | |
2679 | if (xfer == NULL) { | |
2680 | /* FIXME: transaction not found. */ | |
2681 | dev_err(dev, "DTI Error: xfer result--unknown xfer 0x%08x (status 0x%02x)\n", | |
2682 | xfer_id, usb_status); | |
2683 | break; | |
2684 | } | |
2685 | wa_xfer_result_chew(wa, xfer, xfer_result); | |
2686 | wa_xfer_put(xfer); | |
2687 | } else if (wa->dti_state == WA_DTI_ISOC_PACKET_STATUS_PENDING) { | |
226b3a2e | 2688 | dti_busy = wa_process_iso_packet_status(wa, urb); |
7a32d9be TP |
2689 | } else { |
2690 | dev_err(dev, "DTI Error: unexpected EP state = %d\n", | |
2691 | wa->dti_state); | |
df365423 | 2692 | } |
df365423 IPG |
2693 | break; |
2694 | case -ENOENT: /* (we killed the URB)...so, no broadcast */ | |
2695 | case -ESHUTDOWN: /* going away! */ | |
2696 | dev_dbg(dev, "DTI: going down! %d\n", urb->status); | |
2697 | goto out; | |
2698 | default: | |
2699 | /* Unknown error */ | |
2700 | if (edc_inc(&wa->dti_edc, EDC_MAX_ERRORS, | |
2701 | EDC_ERROR_TIMEFRAME)) { | |
2702 | dev_err(dev, "DTI: URB max acceptable errors " | |
2703 | "exceeded, resetting device\n"); | |
2704 | wa_reset_all(wa); | |
2705 | goto out; | |
2706 | } | |
2707 | if (printk_ratelimit()) | |
2708 | dev_err(dev, "DTI: URB error %d\n", urb->status); | |
2709 | break; | |
2710 | } | |
226b3a2e TP |
2711 | |
2712 | /* Resubmit the DTI URB if we are not busy processing isoc in frames. */ | |
2713 | if (!dti_busy) { | |
2714 | result = usb_submit_urb(wa->dti_urb, GFP_ATOMIC); | |
2715 | if (result < 0) { | |
2716 | dev_err(dev, "DTI Error: Could not submit DTI URB (%d)\n", | |
2717 | result); | |
2718 | wa_reset_all(wa); | |
2719 | } | |
df365423 IPG |
2720 | } |
2721 | out: | |
df365423 IPG |
2722 | return; |
2723 | } | |
2724 | ||
2725 | /* | |
2726 | * Transfer complete notification | |
2727 | * | |
2728 | * Called from the notif.c code. We get a notification on EP2 saying | |
2729 | * that some endpoint has some transfer result data available. We are | |
2730 | * about to read it. | |
2731 | * | |
2732 | * To speed up things, we always have a URB reading the DTI URB; we | |
2733 | * don't really set it up and start it until the first xfer complete | |
2734 | * notification arrives, which is what we do here. | |
2735 | * | |
0367eef2 | 2736 | * Follow up in wa_dti_cb(), as that's where the whole state |
df365423 IPG |
2737 | * machine starts. |
2738 | * | |
2739 | * So here we just initialize the DTI URB for reading transfer result | |
2740 | * notifications and also the buffer-in URB, for reading buffers. Then | |
2741 | * we just submit the DTI URB. | |
2742 | * | |
2743 | * @wa shall be referenced | |
2744 | */ | |
2745 | void wa_handle_notif_xfer(struct wahc *wa, struct wa_notif_hdr *notif_hdr) | |
2746 | { | |
2747 | int result; | |
2748 | struct device *dev = &wa->usb_iface->dev; | |
2749 | struct wa_notif_xfer *notif_xfer; | |
2750 | const struct usb_endpoint_descriptor *dti_epd = wa->dti_epd; | |
2751 | ||
df365423 IPG |
2752 | notif_xfer = container_of(notif_hdr, struct wa_notif_xfer, hdr); |
2753 | BUG_ON(notif_hdr->bNotifyType != WA_NOTIF_TRANSFER); | |
2754 | ||
2755 | if ((0x80 | notif_xfer->bEndpoint) != dti_epd->bEndpointAddress) { | |
2756 | /* FIXME: hardcoded limitation, adapt */ | |
2757 | dev_err(dev, "BUG: DTI ep is %u, not %u (hack me)\n", | |
2758 | notif_xfer->bEndpoint, dti_epd->bEndpointAddress); | |
2759 | goto error; | |
2760 | } | |
2761 | if (wa->dti_urb != NULL) /* DTI URB already started */ | |
2762 | goto out; | |
2763 | ||
2764 | wa->dti_urb = usb_alloc_urb(0, GFP_KERNEL); | |
2765 | if (wa->dti_urb == NULL) { | |
2766 | dev_err(dev, "Can't allocate DTI URB\n"); | |
2767 | goto error_dti_urb_alloc; | |
2768 | } | |
2769 | usb_fill_bulk_urb( | |
2770 | wa->dti_urb, wa->usb_dev, | |
2771 | usb_rcvbulkpipe(wa->usb_dev, 0x80 | notif_xfer->bEndpoint), | |
0367eef2 TP |
2772 | wa->dti_buf, wa->dti_buf_size, |
2773 | wa_dti_cb, wa); | |
df365423 IPG |
2774 | |
2775 | wa->buf_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
2776 | if (wa->buf_in_urb == NULL) { | |
2777 | dev_err(dev, "Can't allocate BUF-IN URB\n"); | |
2778 | goto error_buf_in_urb_alloc; | |
2779 | } | |
2780 | usb_fill_bulk_urb( | |
2781 | wa->buf_in_urb, wa->usb_dev, | |
2782 | usb_rcvbulkpipe(wa->usb_dev, 0x80 | notif_xfer->bEndpoint), | |
2783 | NULL, 0, wa_buf_in_cb, wa); | |
2784 | result = usb_submit_urb(wa->dti_urb, GFP_KERNEL); | |
2785 | if (result < 0) { | |
226b3a2e TP |
2786 | dev_err(dev, "DTI Error: Could not submit DTI URB (%d) resetting\n", |
2787 | result); | |
df365423 IPG |
2788 | goto error_dti_urb_submit; |
2789 | } | |
2790 | out: | |
df365423 IPG |
2791 | return; |
2792 | ||
2793 | error_dti_urb_submit: | |
2794 | usb_put_urb(wa->buf_in_urb); | |
6741448e | 2795 | wa->buf_in_urb = NULL; |
df365423 IPG |
2796 | error_buf_in_urb_alloc: |
2797 | usb_put_urb(wa->dti_urb); | |
2798 | wa->dti_urb = NULL; | |
2799 | error_dti_urb_alloc: | |
2800 | error: | |
2801 | wa_reset_all(wa); | |
df365423 | 2802 | } |