Commit | Line | Data |
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7f84eef0 SS |
1 | /* |
2 | * xHCI host controller driver | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp. | |
5 | * | |
6 | * Author: Sarah Sharp | |
7 | * Some code borrowed from the Linux EHCI driver. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | * for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software Foundation, | |
20 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
23 | /* | |
24 | * Ring initialization rules: | |
25 | * 1. Each segment is initialized to zero, except for link TRBs. | |
26 | * 2. Ring cycle state = 0. This represents Producer Cycle State (PCS) or | |
27 | * Consumer Cycle State (CCS), depending on ring function. | |
28 | * 3. Enqueue pointer = dequeue pointer = address of first TRB in the segment. | |
29 | * | |
30 | * Ring behavior rules: | |
31 | * 1. A ring is empty if enqueue == dequeue. This means there will always be at | |
32 | * least one free TRB in the ring. This is useful if you want to turn that | |
33 | * into a link TRB and expand the ring. | |
34 | * 2. When incrementing an enqueue or dequeue pointer, if the next TRB is a | |
35 | * link TRB, then load the pointer with the address in the link TRB. If the | |
36 | * link TRB had its toggle bit set, you may need to update the ring cycle | |
37 | * state (see cycle bit rules). You may have to do this multiple times | |
38 | * until you reach a non-link TRB. | |
39 | * 3. A ring is full if enqueue++ (for the definition of increment above) | |
40 | * equals the dequeue pointer. | |
41 | * | |
42 | * Cycle bit rules: | |
43 | * 1. When a consumer increments a dequeue pointer and encounters a toggle bit | |
44 | * in a link TRB, it must toggle the ring cycle state. | |
45 | * 2. When a producer increments an enqueue pointer and encounters a toggle bit | |
46 | * in a link TRB, it must toggle the ring cycle state. | |
47 | * | |
48 | * Producer rules: | |
49 | * 1. Check if ring is full before you enqueue. | |
50 | * 2. Write the ring cycle state to the cycle bit in the TRB you're enqueuing. | |
51 | * Update enqueue pointer between each write (which may update the ring | |
52 | * cycle state). | |
53 | * 3. Notify consumer. If SW is producer, it rings the doorbell for command | |
54 | * and endpoint rings. If HC is the producer for the event ring, | |
55 | * and it generates an interrupt according to interrupt modulation rules. | |
56 | * | |
57 | * Consumer rules: | |
58 | * 1. Check if TRB belongs to you. If the cycle bit == your ring cycle state, | |
59 | * the TRB is owned by the consumer. | |
60 | * 2. Update dequeue pointer (which may update the ring cycle state) and | |
61 | * continue processing TRBs until you reach a TRB which is not owned by you. | |
62 | * 3. Notify the producer. SW is the consumer for the event ring, and it | |
63 | * updates event ring dequeue pointer. HC is the consumer for the command and | |
64 | * endpoint rings; it generates events on the event ring for these. | |
65 | */ | |
66 | ||
8a96c052 | 67 | #include <linux/scatterlist.h> |
5a0e3ad6 | 68 | #include <linux/slab.h> |
7f84eef0 SS |
69 | #include "xhci.h" |
70 | ||
be88fe4f AX |
71 | static int handle_cmd_in_cmd_wait_list(struct xhci_hcd *xhci, |
72 | struct xhci_virt_device *virt_dev, | |
73 | struct xhci_event_cmd *event); | |
74 | ||
7f84eef0 SS |
75 | /* |
76 | * Returns zero if the TRB isn't in this segment, otherwise it returns the DMA | |
77 | * address of the TRB. | |
78 | */ | |
23e3be11 | 79 | dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, |
7f84eef0 SS |
80 | union xhci_trb *trb) |
81 | { | |
6071d836 | 82 | unsigned long segment_offset; |
7f84eef0 | 83 | |
6071d836 | 84 | if (!seg || !trb || trb < seg->trbs) |
7f84eef0 | 85 | return 0; |
6071d836 SS |
86 | /* offset in TRBs */ |
87 | segment_offset = trb - seg->trbs; | |
88 | if (segment_offset > TRBS_PER_SEGMENT) | |
7f84eef0 | 89 | return 0; |
6071d836 | 90 | return seg->dma + (segment_offset * sizeof(*trb)); |
7f84eef0 SS |
91 | } |
92 | ||
93 | /* Does this link TRB point to the first segment in a ring, | |
94 | * or was the previous TRB the last TRB on the last segment in the ERST? | |
95 | */ | |
575688e1 | 96 | static bool last_trb_on_last_seg(struct xhci_hcd *xhci, struct xhci_ring *ring, |
7f84eef0 SS |
97 | struct xhci_segment *seg, union xhci_trb *trb) |
98 | { | |
99 | if (ring == xhci->event_ring) | |
100 | return (trb == &seg->trbs[TRBS_PER_SEGMENT]) && | |
101 | (seg->next == xhci->event_ring->first_seg); | |
102 | else | |
28ccd296 | 103 | return le32_to_cpu(trb->link.control) & LINK_TOGGLE; |
7f84eef0 SS |
104 | } |
105 | ||
106 | /* Is this TRB a link TRB or was the last TRB the last TRB in this event ring | |
107 | * segment? I.e. would the updated event TRB pointer step off the end of the | |
108 | * event seg? | |
109 | */ | |
575688e1 | 110 | static int last_trb(struct xhci_hcd *xhci, struct xhci_ring *ring, |
7f84eef0 SS |
111 | struct xhci_segment *seg, union xhci_trb *trb) |
112 | { | |
113 | if (ring == xhci->event_ring) | |
114 | return trb == &seg->trbs[TRBS_PER_SEGMENT]; | |
115 | else | |
28ccd296 ME |
116 | return (le32_to_cpu(trb->link.control) & TRB_TYPE_BITMASK) |
117 | == TRB_TYPE(TRB_LINK); | |
7f84eef0 SS |
118 | } |
119 | ||
575688e1 | 120 | static int enqueue_is_link_trb(struct xhci_ring *ring) |
6c12db90 JY |
121 | { |
122 | struct xhci_link_trb *link = &ring->enqueue->link; | |
28ccd296 ME |
123 | return ((le32_to_cpu(link->control) & TRB_TYPE_BITMASK) == |
124 | TRB_TYPE(TRB_LINK)); | |
6c12db90 JY |
125 | } |
126 | ||
ae636747 SS |
127 | /* Updates trb to point to the next TRB in the ring, and updates seg if the next |
128 | * TRB is in a new segment. This does not skip over link TRBs, and it does not | |
129 | * effect the ring dequeue or enqueue pointers. | |
130 | */ | |
131 | static void next_trb(struct xhci_hcd *xhci, | |
132 | struct xhci_ring *ring, | |
133 | struct xhci_segment **seg, | |
134 | union xhci_trb **trb) | |
135 | { | |
136 | if (last_trb(xhci, ring, *seg, *trb)) { | |
137 | *seg = (*seg)->next; | |
138 | *trb = ((*seg)->trbs); | |
139 | } else { | |
a1669b2c | 140 | (*trb)++; |
ae636747 SS |
141 | } |
142 | } | |
143 | ||
7f84eef0 SS |
144 | /* |
145 | * See Cycle bit rules. SW is the consumer for the event ring only. | |
146 | * Don't make a ring full of link TRBs. That would be dumb and this would loop. | |
147 | */ | |
148 | static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring, bool consumer) | |
149 | { | |
150 | union xhci_trb *next = ++(ring->dequeue); | |
66e49d87 | 151 | unsigned long long addr; |
7f84eef0 SS |
152 | |
153 | ring->deq_updates++; | |
154 | /* Update the dequeue pointer further if that was a link TRB or we're at | |
155 | * the end of an event ring segment (which doesn't have link TRBS) | |
156 | */ | |
157 | while (last_trb(xhci, ring, ring->deq_seg, next)) { | |
158 | if (consumer && last_trb_on_last_seg(xhci, ring, ring->deq_seg, next)) { | |
159 | ring->cycle_state = (ring->cycle_state ? 0 : 1); | |
160 | if (!in_interrupt()) | |
700e2052 GKH |
161 | xhci_dbg(xhci, "Toggle cycle state for ring %p = %i\n", |
162 | ring, | |
7f84eef0 SS |
163 | (unsigned int) ring->cycle_state); |
164 | } | |
165 | ring->deq_seg = ring->deq_seg->next; | |
166 | ring->dequeue = ring->deq_seg->trbs; | |
167 | next = ring->dequeue; | |
168 | } | |
66e49d87 | 169 | addr = (unsigned long long) xhci_trb_virt_to_dma(ring->deq_seg, ring->dequeue); |
7f84eef0 SS |
170 | } |
171 | ||
172 | /* | |
173 | * See Cycle bit rules. SW is the consumer for the event ring only. | |
174 | * Don't make a ring full of link TRBs. That would be dumb and this would loop. | |
175 | * | |
176 | * If we've just enqueued a TRB that is in the middle of a TD (meaning the | |
177 | * chain bit is set), then set the chain bit in all the following link TRBs. | |
178 | * If we've enqueued the last TRB in a TD, make sure the following link TRBs | |
179 | * have their chain bit cleared (so that each Link TRB is a separate TD). | |
180 | * | |
181 | * Section 6.4.4.1 of the 0.95 spec says link TRBs cannot have the chain bit | |
b0567b3f SS |
182 | * set, but other sections talk about dealing with the chain bit set. This was |
183 | * fixed in the 0.96 specification errata, but we have to assume that all 0.95 | |
184 | * xHCI hardware can't handle the chain bit being cleared on a link TRB. | |
6cc30d85 SS |
185 | * |
186 | * @more_trbs_coming: Will you enqueue more TRBs before calling | |
187 | * prepare_transfer()? | |
7f84eef0 | 188 | */ |
6cc30d85 SS |
189 | static void inc_enq(struct xhci_hcd *xhci, struct xhci_ring *ring, |
190 | bool consumer, bool more_trbs_coming) | |
7f84eef0 SS |
191 | { |
192 | u32 chain; | |
193 | union xhci_trb *next; | |
66e49d87 | 194 | unsigned long long addr; |
7f84eef0 | 195 | |
28ccd296 | 196 | chain = le32_to_cpu(ring->enqueue->generic.field[3]) & TRB_CHAIN; |
7f84eef0 SS |
197 | next = ++(ring->enqueue); |
198 | ||
199 | ring->enq_updates++; | |
200 | /* Update the dequeue pointer further if that was a link TRB or we're at | |
201 | * the end of an event ring segment (which doesn't have link TRBS) | |
202 | */ | |
203 | while (last_trb(xhci, ring, ring->enq_seg, next)) { | |
204 | if (!consumer) { | |
205 | if (ring != xhci->event_ring) { | |
6cc30d85 SS |
206 | /* |
207 | * If the caller doesn't plan on enqueueing more | |
208 | * TDs before ringing the doorbell, then we | |
209 | * don't want to give the link TRB to the | |
210 | * hardware just yet. We'll give the link TRB | |
211 | * back in prepare_ring() just before we enqueue | |
212 | * the TD at the top of the ring. | |
213 | */ | |
214 | if (!chain && !more_trbs_coming) | |
6c12db90 | 215 | break; |
6cc30d85 SS |
216 | |
217 | /* If we're not dealing with 0.95 hardware, | |
218 | * carry over the chain bit of the previous TRB | |
219 | * (which may mean the chain bit is cleared). | |
220 | */ | |
221 | if (!xhci_link_trb_quirk(xhci)) { | |
28ccd296 ME |
222 | next->link.control &= |
223 | cpu_to_le32(~TRB_CHAIN); | |
224 | next->link.control |= | |
225 | cpu_to_le32(chain); | |
b0567b3f | 226 | } |
6cc30d85 SS |
227 | /* Give this link TRB to the hardware */ |
228 | wmb(); | |
28ccd296 | 229 | next->link.control ^= cpu_to_le32(TRB_CYCLE); |
7f84eef0 SS |
230 | } |
231 | /* Toggle the cycle bit after the last ring segment. */ | |
232 | if (last_trb_on_last_seg(xhci, ring, ring->enq_seg, next)) { | |
233 | ring->cycle_state = (ring->cycle_state ? 0 : 1); | |
234 | if (!in_interrupt()) | |
700e2052 GKH |
235 | xhci_dbg(xhci, "Toggle cycle state for ring %p = %i\n", |
236 | ring, | |
7f84eef0 SS |
237 | (unsigned int) ring->cycle_state); |
238 | } | |
239 | } | |
240 | ring->enq_seg = ring->enq_seg->next; | |
241 | ring->enqueue = ring->enq_seg->trbs; | |
242 | next = ring->enqueue; | |
243 | } | |
66e49d87 | 244 | addr = (unsigned long long) xhci_trb_virt_to_dma(ring->enq_seg, ring->enqueue); |
7f84eef0 SS |
245 | } |
246 | ||
247 | /* | |
248 | * Check to see if there's room to enqueue num_trbs on the ring. See rules | |
249 | * above. | |
250 | * FIXME: this would be simpler and faster if we just kept track of the number | |
251 | * of free TRBs in a ring. | |
252 | */ | |
253 | static int room_on_ring(struct xhci_hcd *xhci, struct xhci_ring *ring, | |
254 | unsigned int num_trbs) | |
255 | { | |
256 | int i; | |
257 | union xhci_trb *enq = ring->enqueue; | |
258 | struct xhci_segment *enq_seg = ring->enq_seg; | |
44ebd037 SS |
259 | struct xhci_segment *cur_seg; |
260 | unsigned int left_on_ring; | |
7f84eef0 | 261 | |
6c12db90 JY |
262 | /* If we are currently pointing to a link TRB, advance the |
263 | * enqueue pointer before checking for space */ | |
264 | while (last_trb(xhci, ring, enq_seg, enq)) { | |
265 | enq_seg = enq_seg->next; | |
266 | enq = enq_seg->trbs; | |
267 | } | |
268 | ||
7f84eef0 | 269 | /* Check if ring is empty */ |
44ebd037 SS |
270 | if (enq == ring->dequeue) { |
271 | /* Can't use link trbs */ | |
272 | left_on_ring = TRBS_PER_SEGMENT - 1; | |
273 | for (cur_seg = enq_seg->next; cur_seg != enq_seg; | |
274 | cur_seg = cur_seg->next) | |
275 | left_on_ring += TRBS_PER_SEGMENT - 1; | |
276 | ||
277 | /* Always need one TRB free in the ring. */ | |
278 | left_on_ring -= 1; | |
279 | if (num_trbs > left_on_ring) { | |
280 | xhci_warn(xhci, "Not enough room on ring; " | |
281 | "need %u TRBs, %u TRBs left\n", | |
282 | num_trbs, left_on_ring); | |
283 | return 0; | |
284 | } | |
7f84eef0 | 285 | return 1; |
44ebd037 | 286 | } |
7f84eef0 SS |
287 | /* Make sure there's an extra empty TRB available */ |
288 | for (i = 0; i <= num_trbs; ++i) { | |
289 | if (enq == ring->dequeue) | |
290 | return 0; | |
291 | enq++; | |
292 | while (last_trb(xhci, ring, enq_seg, enq)) { | |
293 | enq_seg = enq_seg->next; | |
294 | enq = enq_seg->trbs; | |
295 | } | |
296 | } | |
297 | return 1; | |
298 | } | |
299 | ||
7f84eef0 | 300 | /* Ring the host controller doorbell after placing a command on the ring */ |
23e3be11 | 301 | void xhci_ring_cmd_db(struct xhci_hcd *xhci) |
7f84eef0 | 302 | { |
7f84eef0 | 303 | xhci_dbg(xhci, "// Ding dong!\n"); |
50d64676 | 304 | xhci_writel(xhci, DB_VALUE_HOST, &xhci->dba->doorbell[0]); |
7f84eef0 SS |
305 | /* Flush PCI posted writes */ |
306 | xhci_readl(xhci, &xhci->dba->doorbell[0]); | |
307 | } | |
308 | ||
be88fe4f | 309 | void xhci_ring_ep_doorbell(struct xhci_hcd *xhci, |
ae636747 | 310 | unsigned int slot_id, |
e9df17eb SS |
311 | unsigned int ep_index, |
312 | unsigned int stream_id) | |
ae636747 | 313 | { |
28ccd296 | 314 | __le32 __iomem *db_addr = &xhci->dba->doorbell[slot_id]; |
50d64676 MW |
315 | struct xhci_virt_ep *ep = &xhci->devs[slot_id]->eps[ep_index]; |
316 | unsigned int ep_state = ep->ep_state; | |
ae636747 | 317 | |
ae636747 | 318 | /* Don't ring the doorbell for this endpoint if there are pending |
50d64676 | 319 | * cancellations because we don't want to interrupt processing. |
8df75f42 SS |
320 | * We don't want to restart any stream rings if there's a set dequeue |
321 | * pointer command pending because the device can choose to start any | |
322 | * stream once the endpoint is on the HW schedule. | |
323 | * FIXME - check all the stream rings for pending cancellations. | |
ae636747 | 324 | */ |
50d64676 MW |
325 | if ((ep_state & EP_HALT_PENDING) || (ep_state & SET_DEQ_PENDING) || |
326 | (ep_state & EP_HALTED)) | |
327 | return; | |
328 | xhci_writel(xhci, DB_VALUE(ep_index, stream_id), db_addr); | |
329 | /* The CPU has better things to do at this point than wait for a | |
330 | * write-posting flush. It'll get there soon enough. | |
331 | */ | |
ae636747 SS |
332 | } |
333 | ||
e9df17eb SS |
334 | /* Ring the doorbell for any rings with pending URBs */ |
335 | static void ring_doorbell_for_active_rings(struct xhci_hcd *xhci, | |
336 | unsigned int slot_id, | |
337 | unsigned int ep_index) | |
338 | { | |
339 | unsigned int stream_id; | |
340 | struct xhci_virt_ep *ep; | |
341 | ||
342 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
343 | ||
344 | /* A ring has pending URBs if its TD list is not empty */ | |
345 | if (!(ep->ep_state & EP_HAS_STREAMS)) { | |
346 | if (!(list_empty(&ep->ring->td_list))) | |
be88fe4f | 347 | xhci_ring_ep_doorbell(xhci, slot_id, ep_index, 0); |
e9df17eb SS |
348 | return; |
349 | } | |
350 | ||
351 | for (stream_id = 1; stream_id < ep->stream_info->num_streams; | |
352 | stream_id++) { | |
353 | struct xhci_stream_info *stream_info = ep->stream_info; | |
354 | if (!list_empty(&stream_info->stream_rings[stream_id]->td_list)) | |
be88fe4f AX |
355 | xhci_ring_ep_doorbell(xhci, slot_id, ep_index, |
356 | stream_id); | |
e9df17eb SS |
357 | } |
358 | } | |
359 | ||
ae636747 SS |
360 | /* |
361 | * Find the segment that trb is in. Start searching in start_seg. | |
362 | * If we must move past a segment that has a link TRB with a toggle cycle state | |
363 | * bit set, then we will toggle the value pointed at by cycle_state. | |
364 | */ | |
365 | static struct xhci_segment *find_trb_seg( | |
366 | struct xhci_segment *start_seg, | |
367 | union xhci_trb *trb, int *cycle_state) | |
368 | { | |
369 | struct xhci_segment *cur_seg = start_seg; | |
370 | struct xhci_generic_trb *generic_trb; | |
371 | ||
372 | while (cur_seg->trbs > trb || | |
373 | &cur_seg->trbs[TRBS_PER_SEGMENT - 1] < trb) { | |
374 | generic_trb = &cur_seg->trbs[TRBS_PER_SEGMENT - 1].generic; | |
28ccd296 | 375 | if (le32_to_cpu(generic_trb->field[3]) & LINK_TOGGLE) |
ba0a4d9a | 376 | *cycle_state ^= 0x1; |
ae636747 SS |
377 | cur_seg = cur_seg->next; |
378 | if (cur_seg == start_seg) | |
379 | /* Looped over the entire list. Oops! */ | |
326b4810 | 380 | return NULL; |
ae636747 SS |
381 | } |
382 | return cur_seg; | |
383 | } | |
384 | ||
021bff91 SS |
385 | |
386 | static struct xhci_ring *xhci_triad_to_transfer_ring(struct xhci_hcd *xhci, | |
387 | unsigned int slot_id, unsigned int ep_index, | |
388 | unsigned int stream_id) | |
389 | { | |
390 | struct xhci_virt_ep *ep; | |
391 | ||
392 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
393 | /* Common case: no streams */ | |
394 | if (!(ep->ep_state & EP_HAS_STREAMS)) | |
395 | return ep->ring; | |
396 | ||
397 | if (stream_id == 0) { | |
398 | xhci_warn(xhci, | |
399 | "WARN: Slot ID %u, ep index %u has streams, " | |
400 | "but URB has no stream ID.\n", | |
401 | slot_id, ep_index); | |
402 | return NULL; | |
403 | } | |
404 | ||
405 | if (stream_id < ep->stream_info->num_streams) | |
406 | return ep->stream_info->stream_rings[stream_id]; | |
407 | ||
408 | xhci_warn(xhci, | |
409 | "WARN: Slot ID %u, ep index %u has " | |
410 | "stream IDs 1 to %u allocated, " | |
411 | "but stream ID %u is requested.\n", | |
412 | slot_id, ep_index, | |
413 | ep->stream_info->num_streams - 1, | |
414 | stream_id); | |
415 | return NULL; | |
416 | } | |
417 | ||
418 | /* Get the right ring for the given URB. | |
419 | * If the endpoint supports streams, boundary check the URB's stream ID. | |
420 | * If the endpoint doesn't support streams, return the singular endpoint ring. | |
421 | */ | |
422 | static struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci, | |
423 | struct urb *urb) | |
424 | { | |
425 | return xhci_triad_to_transfer_ring(xhci, urb->dev->slot_id, | |
426 | xhci_get_endpoint_index(&urb->ep->desc), urb->stream_id); | |
427 | } | |
428 | ||
ae636747 SS |
429 | /* |
430 | * Move the xHC's endpoint ring dequeue pointer past cur_td. | |
431 | * Record the new state of the xHC's endpoint ring dequeue segment, | |
432 | * dequeue pointer, and new consumer cycle state in state. | |
433 | * Update our internal representation of the ring's dequeue pointer. | |
434 | * | |
435 | * We do this in three jumps: | |
436 | * - First we update our new ring state to be the same as when the xHC stopped. | |
437 | * - Then we traverse the ring to find the segment that contains | |
438 | * the last TRB in the TD. We toggle the xHC's new cycle state when we pass | |
439 | * any link TRBs with the toggle cycle bit set. | |
440 | * - Finally we move the dequeue state one TRB further, toggling the cycle bit | |
441 | * if we've moved it past a link TRB with the toggle cycle bit set. | |
28ccd296 ME |
442 | * |
443 | * Some of the uses of xhci_generic_trb are grotty, but if they're done | |
444 | * with correct __le32 accesses they should work fine. Only users of this are | |
445 | * in here. | |
ae636747 | 446 | */ |
c92bcfa7 | 447 | void xhci_find_new_dequeue_state(struct xhci_hcd *xhci, |
ae636747 | 448 | unsigned int slot_id, unsigned int ep_index, |
e9df17eb SS |
449 | unsigned int stream_id, struct xhci_td *cur_td, |
450 | struct xhci_dequeue_state *state) | |
ae636747 SS |
451 | { |
452 | struct xhci_virt_device *dev = xhci->devs[slot_id]; | |
e9df17eb | 453 | struct xhci_ring *ep_ring; |
ae636747 | 454 | struct xhci_generic_trb *trb; |
d115b048 | 455 | struct xhci_ep_ctx *ep_ctx; |
c92bcfa7 | 456 | dma_addr_t addr; |
ae636747 | 457 | |
e9df17eb SS |
458 | ep_ring = xhci_triad_to_transfer_ring(xhci, slot_id, |
459 | ep_index, stream_id); | |
460 | if (!ep_ring) { | |
461 | xhci_warn(xhci, "WARN can't find new dequeue state " | |
462 | "for invalid stream ID %u.\n", | |
463 | stream_id); | |
464 | return; | |
465 | } | |
ae636747 | 466 | state->new_cycle_state = 0; |
c92bcfa7 | 467 | xhci_dbg(xhci, "Finding segment containing stopped TRB.\n"); |
ae636747 | 468 | state->new_deq_seg = find_trb_seg(cur_td->start_seg, |
63a0d9ab | 469 | dev->eps[ep_index].stopped_trb, |
ae636747 | 470 | &state->new_cycle_state); |
68e41c5d PZ |
471 | if (!state->new_deq_seg) { |
472 | WARN_ON(1); | |
473 | return; | |
474 | } | |
475 | ||
ae636747 | 476 | /* Dig out the cycle state saved by the xHC during the stop ep cmd */ |
c92bcfa7 | 477 | xhci_dbg(xhci, "Finding endpoint context\n"); |
d115b048 | 478 | ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index); |
28ccd296 | 479 | state->new_cycle_state = 0x1 & le64_to_cpu(ep_ctx->deq); |
ae636747 SS |
480 | |
481 | state->new_deq_ptr = cur_td->last_trb; | |
c92bcfa7 | 482 | xhci_dbg(xhci, "Finding segment containing last TRB in TD.\n"); |
ae636747 SS |
483 | state->new_deq_seg = find_trb_seg(state->new_deq_seg, |
484 | state->new_deq_ptr, | |
485 | &state->new_cycle_state); | |
68e41c5d PZ |
486 | if (!state->new_deq_seg) { |
487 | WARN_ON(1); | |
488 | return; | |
489 | } | |
ae636747 SS |
490 | |
491 | trb = &state->new_deq_ptr->generic; | |
28ccd296 ME |
492 | if ((le32_to_cpu(trb->field[3]) & TRB_TYPE_BITMASK) == |
493 | TRB_TYPE(TRB_LINK) && (le32_to_cpu(trb->field[3]) & LINK_TOGGLE)) | |
ba0a4d9a | 494 | state->new_cycle_state ^= 0x1; |
ae636747 SS |
495 | next_trb(xhci, ep_ring, &state->new_deq_seg, &state->new_deq_ptr); |
496 | ||
01a1fdb9 SS |
497 | /* |
498 | * If there is only one segment in a ring, find_trb_seg()'s while loop | |
499 | * will not run, and it will return before it has a chance to see if it | |
500 | * needs to toggle the cycle bit. It can't tell if the stalled transfer | |
501 | * ended just before the link TRB on a one-segment ring, or if the TD | |
502 | * wrapped around the top of the ring, because it doesn't have the TD in | |
503 | * question. Look for the one-segment case where stalled TRB's address | |
504 | * is greater than the new dequeue pointer address. | |
505 | */ | |
506 | if (ep_ring->first_seg == ep_ring->first_seg->next && | |
507 | state->new_deq_ptr < dev->eps[ep_index].stopped_trb) | |
508 | state->new_cycle_state ^= 0x1; | |
509 | xhci_dbg(xhci, "Cycle state = 0x%x\n", state->new_cycle_state); | |
510 | ||
ae636747 | 511 | /* Don't update the ring cycle state for the producer (us). */ |
c92bcfa7 SS |
512 | xhci_dbg(xhci, "New dequeue segment = %p (virtual)\n", |
513 | state->new_deq_seg); | |
514 | addr = xhci_trb_virt_to_dma(state->new_deq_seg, state->new_deq_ptr); | |
515 | xhci_dbg(xhci, "New dequeue pointer = 0x%llx (DMA)\n", | |
516 | (unsigned long long) addr); | |
ae636747 SS |
517 | } |
518 | ||
23e3be11 | 519 | static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring, |
ae636747 SS |
520 | struct xhci_td *cur_td) |
521 | { | |
522 | struct xhci_segment *cur_seg; | |
523 | union xhci_trb *cur_trb; | |
524 | ||
525 | for (cur_seg = cur_td->start_seg, cur_trb = cur_td->first_trb; | |
526 | true; | |
527 | next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) { | |
28ccd296 ME |
528 | if ((le32_to_cpu(cur_trb->generic.field[3]) & TRB_TYPE_BITMASK) |
529 | == TRB_TYPE(TRB_LINK)) { | |
ae636747 SS |
530 | /* Unchain any chained Link TRBs, but |
531 | * leave the pointers intact. | |
532 | */ | |
28ccd296 | 533 | cur_trb->generic.field[3] &= cpu_to_le32(~TRB_CHAIN); |
ae636747 | 534 | xhci_dbg(xhci, "Cancel (unchain) link TRB\n"); |
700e2052 GKH |
535 | xhci_dbg(xhci, "Address = %p (0x%llx dma); " |
536 | "in seg %p (0x%llx dma)\n", | |
537 | cur_trb, | |
23e3be11 | 538 | (unsigned long long)xhci_trb_virt_to_dma(cur_seg, cur_trb), |
700e2052 GKH |
539 | cur_seg, |
540 | (unsigned long long)cur_seg->dma); | |
ae636747 SS |
541 | } else { |
542 | cur_trb->generic.field[0] = 0; | |
543 | cur_trb->generic.field[1] = 0; | |
544 | cur_trb->generic.field[2] = 0; | |
545 | /* Preserve only the cycle bit of this TRB */ | |
28ccd296 ME |
546 | cur_trb->generic.field[3] &= cpu_to_le32(TRB_CYCLE); |
547 | cur_trb->generic.field[3] |= cpu_to_le32( | |
548 | TRB_TYPE(TRB_TR_NOOP)); | |
700e2052 GKH |
549 | xhci_dbg(xhci, "Cancel TRB %p (0x%llx dma) " |
550 | "in seg %p (0x%llx dma)\n", | |
551 | cur_trb, | |
23e3be11 | 552 | (unsigned long long)xhci_trb_virt_to_dma(cur_seg, cur_trb), |
700e2052 GKH |
553 | cur_seg, |
554 | (unsigned long long)cur_seg->dma); | |
ae636747 SS |
555 | } |
556 | if (cur_trb == cur_td->last_trb) | |
557 | break; | |
558 | } | |
559 | } | |
560 | ||
561 | static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id, | |
e9df17eb SS |
562 | unsigned int ep_index, unsigned int stream_id, |
563 | struct xhci_segment *deq_seg, | |
ae636747 SS |
564 | union xhci_trb *deq_ptr, u32 cycle_state); |
565 | ||
c92bcfa7 | 566 | void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci, |
63a0d9ab | 567 | unsigned int slot_id, unsigned int ep_index, |
e9df17eb | 568 | unsigned int stream_id, |
63a0d9ab | 569 | struct xhci_dequeue_state *deq_state) |
c92bcfa7 | 570 | { |
63a0d9ab SS |
571 | struct xhci_virt_ep *ep = &xhci->devs[slot_id]->eps[ep_index]; |
572 | ||
c92bcfa7 SS |
573 | xhci_dbg(xhci, "Set TR Deq Ptr cmd, new deq seg = %p (0x%llx dma), " |
574 | "new deq ptr = %p (0x%llx dma), new cycle = %u\n", | |
575 | deq_state->new_deq_seg, | |
576 | (unsigned long long)deq_state->new_deq_seg->dma, | |
577 | deq_state->new_deq_ptr, | |
578 | (unsigned long long)xhci_trb_virt_to_dma(deq_state->new_deq_seg, deq_state->new_deq_ptr), | |
579 | deq_state->new_cycle_state); | |
e9df17eb | 580 | queue_set_tr_deq(xhci, slot_id, ep_index, stream_id, |
c92bcfa7 SS |
581 | deq_state->new_deq_seg, |
582 | deq_state->new_deq_ptr, | |
583 | (u32) deq_state->new_cycle_state); | |
584 | /* Stop the TD queueing code from ringing the doorbell until | |
585 | * this command completes. The HC won't set the dequeue pointer | |
586 | * if the ring is running, and ringing the doorbell starts the | |
587 | * ring running. | |
588 | */ | |
63a0d9ab | 589 | ep->ep_state |= SET_DEQ_PENDING; |
c92bcfa7 SS |
590 | } |
591 | ||
575688e1 | 592 | static void xhci_stop_watchdog_timer_in_irq(struct xhci_hcd *xhci, |
6f5165cf SS |
593 | struct xhci_virt_ep *ep) |
594 | { | |
595 | ep->ep_state &= ~EP_HALT_PENDING; | |
596 | /* Can't del_timer_sync in interrupt, so we attempt to cancel. If the | |
597 | * timer is running on another CPU, we don't decrement stop_cmds_pending | |
598 | * (since we didn't successfully stop the watchdog timer). | |
599 | */ | |
600 | if (del_timer(&ep->stop_cmd_timer)) | |
601 | ep->stop_cmds_pending--; | |
602 | } | |
603 | ||
604 | /* Must be called with xhci->lock held in interrupt context */ | |
605 | static void xhci_giveback_urb_in_irq(struct xhci_hcd *xhci, | |
606 | struct xhci_td *cur_td, int status, char *adjective) | |
607 | { | |
214f76f7 | 608 | struct usb_hcd *hcd; |
8e51adcc AX |
609 | struct urb *urb; |
610 | struct urb_priv *urb_priv; | |
6f5165cf | 611 | |
8e51adcc AX |
612 | urb = cur_td->urb; |
613 | urb_priv = urb->hcpriv; | |
614 | urb_priv->td_cnt++; | |
214f76f7 | 615 | hcd = bus_to_hcd(urb->dev->bus); |
6f5165cf | 616 | |
8e51adcc AX |
617 | /* Only giveback urb when this is the last td in urb */ |
618 | if (urb_priv->td_cnt == urb_priv->length) { | |
c41136b0 AX |
619 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
620 | xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs--; | |
621 | if (xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs == 0) { | |
622 | if (xhci->quirks & XHCI_AMD_PLL_FIX) | |
623 | usb_amd_quirk_pll_enable(); | |
624 | } | |
625 | } | |
8e51adcc | 626 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
8e51adcc AX |
627 | |
628 | spin_unlock(&xhci->lock); | |
629 | usb_hcd_giveback_urb(hcd, urb, status); | |
630 | xhci_urb_free_priv(xhci, urb_priv); | |
631 | spin_lock(&xhci->lock); | |
8e51adcc | 632 | } |
6f5165cf SS |
633 | } |
634 | ||
ae636747 SS |
635 | /* |
636 | * When we get a command completion for a Stop Endpoint Command, we need to | |
637 | * unlink any cancelled TDs from the ring. There are two ways to do that: | |
638 | * | |
639 | * 1. If the HW was in the middle of processing the TD that needs to be | |
640 | * cancelled, then we must move the ring's dequeue pointer past the last TRB | |
641 | * in the TD with a Set Dequeue Pointer Command. | |
642 | * 2. Otherwise, we turn all the TRBs in the TD into No-op TRBs (with the chain | |
643 | * bit cleared) so that the HW will skip over them. | |
644 | */ | |
645 | static void handle_stopped_endpoint(struct xhci_hcd *xhci, | |
be88fe4f | 646 | union xhci_trb *trb, struct xhci_event_cmd *event) |
ae636747 SS |
647 | { |
648 | unsigned int slot_id; | |
649 | unsigned int ep_index; | |
be88fe4f | 650 | struct xhci_virt_device *virt_dev; |
ae636747 | 651 | struct xhci_ring *ep_ring; |
63a0d9ab | 652 | struct xhci_virt_ep *ep; |
ae636747 | 653 | struct list_head *entry; |
326b4810 | 654 | struct xhci_td *cur_td = NULL; |
ae636747 SS |
655 | struct xhci_td *last_unlinked_td; |
656 | ||
c92bcfa7 | 657 | struct xhci_dequeue_state deq_state; |
ae636747 | 658 | |
be88fe4f | 659 | if (unlikely(TRB_TO_SUSPEND_PORT( |
28ccd296 | 660 | le32_to_cpu(xhci->cmd_ring->dequeue->generic.field[3])))) { |
be88fe4f | 661 | slot_id = TRB_TO_SLOT_ID( |
28ccd296 | 662 | le32_to_cpu(xhci->cmd_ring->dequeue->generic.field[3])); |
be88fe4f AX |
663 | virt_dev = xhci->devs[slot_id]; |
664 | if (virt_dev) | |
665 | handle_cmd_in_cmd_wait_list(xhci, virt_dev, | |
666 | event); | |
667 | else | |
668 | xhci_warn(xhci, "Stop endpoint command " | |
669 | "completion for disabled slot %u\n", | |
670 | slot_id); | |
671 | return; | |
672 | } | |
673 | ||
ae636747 | 674 | memset(&deq_state, 0, sizeof(deq_state)); |
28ccd296 ME |
675 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(trb->generic.field[3])); |
676 | ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3])); | |
63a0d9ab | 677 | ep = &xhci->devs[slot_id]->eps[ep_index]; |
ae636747 | 678 | |
678539cf | 679 | if (list_empty(&ep->cancelled_td_list)) { |
6f5165cf | 680 | xhci_stop_watchdog_timer_in_irq(xhci, ep); |
0714a57c SS |
681 | ep->stopped_td = NULL; |
682 | ep->stopped_trb = NULL; | |
e9df17eb | 683 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); |
ae636747 | 684 | return; |
678539cf | 685 | } |
ae636747 SS |
686 | |
687 | /* Fix up the ep ring first, so HW stops executing cancelled TDs. | |
688 | * We have the xHCI lock, so nothing can modify this list until we drop | |
689 | * it. We're also in the event handler, so we can't get re-interrupted | |
690 | * if another Stop Endpoint command completes | |
691 | */ | |
63a0d9ab | 692 | list_for_each(entry, &ep->cancelled_td_list) { |
ae636747 | 693 | cur_td = list_entry(entry, struct xhci_td, cancelled_td_list); |
700e2052 GKH |
694 | xhci_dbg(xhci, "Cancelling TD starting at %p, 0x%llx (dma).\n", |
695 | cur_td->first_trb, | |
23e3be11 | 696 | (unsigned long long)xhci_trb_virt_to_dma(cur_td->start_seg, cur_td->first_trb)); |
e9df17eb SS |
697 | ep_ring = xhci_urb_to_transfer_ring(xhci, cur_td->urb); |
698 | if (!ep_ring) { | |
699 | /* This shouldn't happen unless a driver is mucking | |
700 | * with the stream ID after submission. This will | |
701 | * leave the TD on the hardware ring, and the hardware | |
702 | * will try to execute it, and may access a buffer | |
703 | * that has already been freed. In the best case, the | |
704 | * hardware will execute it, and the event handler will | |
705 | * ignore the completion event for that TD, since it was | |
706 | * removed from the td_list for that endpoint. In | |
707 | * short, don't muck with the stream ID after | |
708 | * submission. | |
709 | */ | |
710 | xhci_warn(xhci, "WARN Cancelled URB %p " | |
711 | "has invalid stream ID %u.\n", | |
712 | cur_td->urb, | |
713 | cur_td->urb->stream_id); | |
714 | goto remove_finished_td; | |
715 | } | |
ae636747 SS |
716 | /* |
717 | * If we stopped on the TD we need to cancel, then we have to | |
718 | * move the xHC endpoint ring dequeue pointer past this TD. | |
719 | */ | |
63a0d9ab | 720 | if (cur_td == ep->stopped_td) |
e9df17eb SS |
721 | xhci_find_new_dequeue_state(xhci, slot_id, ep_index, |
722 | cur_td->urb->stream_id, | |
723 | cur_td, &deq_state); | |
ae636747 SS |
724 | else |
725 | td_to_noop(xhci, ep_ring, cur_td); | |
e9df17eb | 726 | remove_finished_td: |
ae636747 SS |
727 | /* |
728 | * The event handler won't see a completion for this TD anymore, | |
729 | * so remove it from the endpoint ring's TD list. Keep it in | |
730 | * the cancelled TD list for URB completion later. | |
731 | */ | |
732 | list_del(&cur_td->td_list); | |
ae636747 SS |
733 | } |
734 | last_unlinked_td = cur_td; | |
6f5165cf | 735 | xhci_stop_watchdog_timer_in_irq(xhci, ep); |
ae636747 SS |
736 | |
737 | /* If necessary, queue a Set Transfer Ring Dequeue Pointer command */ | |
738 | if (deq_state.new_deq_ptr && deq_state.new_deq_seg) { | |
63a0d9ab | 739 | xhci_queue_new_dequeue_state(xhci, |
e9df17eb SS |
740 | slot_id, ep_index, |
741 | ep->stopped_td->urb->stream_id, | |
742 | &deq_state); | |
ac9d8fe7 | 743 | xhci_ring_cmd_db(xhci); |
ae636747 | 744 | } else { |
e9df17eb SS |
745 | /* Otherwise ring the doorbell(s) to restart queued transfers */ |
746 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); | |
ae636747 | 747 | } |
1624ae1c SS |
748 | ep->stopped_td = NULL; |
749 | ep->stopped_trb = NULL; | |
ae636747 SS |
750 | |
751 | /* | |
752 | * Drop the lock and complete the URBs in the cancelled TD list. | |
753 | * New TDs to be cancelled might be added to the end of the list before | |
754 | * we can complete all the URBs for the TDs we already unlinked. | |
755 | * So stop when we've completed the URB for the last TD we unlinked. | |
756 | */ | |
757 | do { | |
63a0d9ab | 758 | cur_td = list_entry(ep->cancelled_td_list.next, |
ae636747 SS |
759 | struct xhci_td, cancelled_td_list); |
760 | list_del(&cur_td->cancelled_td_list); | |
761 | ||
762 | /* Clean up the cancelled URB */ | |
ae636747 SS |
763 | /* Doesn't matter what we pass for status, since the core will |
764 | * just overwrite it (because the URB has been unlinked). | |
765 | */ | |
6f5165cf | 766 | xhci_giveback_urb_in_irq(xhci, cur_td, 0, "cancelled"); |
ae636747 | 767 | |
6f5165cf SS |
768 | /* Stop processing the cancelled list if the watchdog timer is |
769 | * running. | |
770 | */ | |
771 | if (xhci->xhc_state & XHCI_STATE_DYING) | |
772 | return; | |
ae636747 SS |
773 | } while (cur_td != last_unlinked_td); |
774 | ||
775 | /* Return to the event handler with xhci->lock re-acquired */ | |
776 | } | |
777 | ||
6f5165cf SS |
778 | /* Watchdog timer function for when a stop endpoint command fails to complete. |
779 | * In this case, we assume the host controller is broken or dying or dead. The | |
780 | * host may still be completing some other events, so we have to be careful to | |
781 | * let the event ring handler and the URB dequeueing/enqueueing functions know | |
782 | * through xhci->state. | |
783 | * | |
784 | * The timer may also fire if the host takes a very long time to respond to the | |
785 | * command, and the stop endpoint command completion handler cannot delete the | |
786 | * timer before the timer function is called. Another endpoint cancellation may | |
787 | * sneak in before the timer function can grab the lock, and that may queue | |
788 | * another stop endpoint command and add the timer back. So we cannot use a | |
789 | * simple flag to say whether there is a pending stop endpoint command for a | |
790 | * particular endpoint. | |
791 | * | |
792 | * Instead we use a combination of that flag and a counter for the number of | |
793 | * pending stop endpoint commands. If the timer is the tail end of the last | |
794 | * stop endpoint command, and the endpoint's command is still pending, we assume | |
795 | * the host is dying. | |
796 | */ | |
797 | void xhci_stop_endpoint_command_watchdog(unsigned long arg) | |
798 | { | |
799 | struct xhci_hcd *xhci; | |
800 | struct xhci_virt_ep *ep; | |
801 | struct xhci_virt_ep *temp_ep; | |
802 | struct xhci_ring *ring; | |
803 | struct xhci_td *cur_td; | |
804 | int ret, i, j; | |
805 | ||
806 | ep = (struct xhci_virt_ep *) arg; | |
807 | xhci = ep->xhci; | |
808 | ||
809 | spin_lock(&xhci->lock); | |
810 | ||
811 | ep->stop_cmds_pending--; | |
812 | if (xhci->xhc_state & XHCI_STATE_DYING) { | |
813 | xhci_dbg(xhci, "Stop EP timer ran, but another timer marked " | |
814 | "xHCI as DYING, exiting.\n"); | |
815 | spin_unlock(&xhci->lock); | |
816 | return; | |
817 | } | |
818 | if (!(ep->stop_cmds_pending == 0 && (ep->ep_state & EP_HALT_PENDING))) { | |
819 | xhci_dbg(xhci, "Stop EP timer ran, but no command pending, " | |
820 | "exiting.\n"); | |
821 | spin_unlock(&xhci->lock); | |
822 | return; | |
823 | } | |
824 | ||
825 | xhci_warn(xhci, "xHCI host not responding to stop endpoint command.\n"); | |
826 | xhci_warn(xhci, "Assuming host is dying, halting host.\n"); | |
827 | /* Oops, HC is dead or dying or at least not responding to the stop | |
828 | * endpoint command. | |
829 | */ | |
830 | xhci->xhc_state |= XHCI_STATE_DYING; | |
831 | /* Disable interrupts from the host controller and start halting it */ | |
832 | xhci_quiesce(xhci); | |
833 | spin_unlock(&xhci->lock); | |
834 | ||
835 | ret = xhci_halt(xhci); | |
836 | ||
837 | spin_lock(&xhci->lock); | |
838 | if (ret < 0) { | |
839 | /* This is bad; the host is not responding to commands and it's | |
840 | * not allowing itself to be halted. At least interrupts are | |
ac04e6ff | 841 | * disabled. If we call usb_hc_died(), it will attempt to |
6f5165cf SS |
842 | * disconnect all device drivers under this host. Those |
843 | * disconnect() methods will wait for all URBs to be unlinked, | |
844 | * so we must complete them. | |
845 | */ | |
846 | xhci_warn(xhci, "Non-responsive xHCI host is not halting.\n"); | |
847 | xhci_warn(xhci, "Completing active URBs anyway.\n"); | |
848 | /* We could turn all TDs on the rings to no-ops. This won't | |
849 | * help if the host has cached part of the ring, and is slow if | |
850 | * we want to preserve the cycle bit. Skip it and hope the host | |
851 | * doesn't touch the memory. | |
852 | */ | |
853 | } | |
854 | for (i = 0; i < MAX_HC_SLOTS; i++) { | |
855 | if (!xhci->devs[i]) | |
856 | continue; | |
857 | for (j = 0; j < 31; j++) { | |
858 | temp_ep = &xhci->devs[i]->eps[j]; | |
859 | ring = temp_ep->ring; | |
860 | if (!ring) | |
861 | continue; | |
862 | xhci_dbg(xhci, "Killing URBs for slot ID %u, " | |
863 | "ep index %u\n", i, j); | |
864 | while (!list_empty(&ring->td_list)) { | |
865 | cur_td = list_first_entry(&ring->td_list, | |
866 | struct xhci_td, | |
867 | td_list); | |
868 | list_del(&cur_td->td_list); | |
869 | if (!list_empty(&cur_td->cancelled_td_list)) | |
870 | list_del(&cur_td->cancelled_td_list); | |
871 | xhci_giveback_urb_in_irq(xhci, cur_td, | |
872 | -ESHUTDOWN, "killed"); | |
873 | } | |
874 | while (!list_empty(&temp_ep->cancelled_td_list)) { | |
875 | cur_td = list_first_entry( | |
876 | &temp_ep->cancelled_td_list, | |
877 | struct xhci_td, | |
878 | cancelled_td_list); | |
879 | list_del(&cur_td->cancelled_td_list); | |
880 | xhci_giveback_urb_in_irq(xhci, cur_td, | |
881 | -ESHUTDOWN, "killed"); | |
882 | } | |
883 | } | |
884 | } | |
885 | spin_unlock(&xhci->lock); | |
6f5165cf | 886 | xhci_dbg(xhci, "Calling usb_hc_died()\n"); |
f6ff0ac8 | 887 | usb_hc_died(xhci_to_hcd(xhci)->primary_hcd); |
6f5165cf SS |
888 | xhci_dbg(xhci, "xHCI host controller is dead.\n"); |
889 | } | |
890 | ||
ae636747 SS |
891 | /* |
892 | * When we get a completion for a Set Transfer Ring Dequeue Pointer command, | |
893 | * we need to clear the set deq pending flag in the endpoint ring state, so that | |
894 | * the TD queueing code can ring the doorbell again. We also need to ring the | |
895 | * endpoint doorbell to restart the ring, but only if there aren't more | |
896 | * cancellations pending. | |
897 | */ | |
898 | static void handle_set_deq_completion(struct xhci_hcd *xhci, | |
899 | struct xhci_event_cmd *event, | |
900 | union xhci_trb *trb) | |
901 | { | |
902 | unsigned int slot_id; | |
903 | unsigned int ep_index; | |
e9df17eb | 904 | unsigned int stream_id; |
ae636747 SS |
905 | struct xhci_ring *ep_ring; |
906 | struct xhci_virt_device *dev; | |
d115b048 JY |
907 | struct xhci_ep_ctx *ep_ctx; |
908 | struct xhci_slot_ctx *slot_ctx; | |
ae636747 | 909 | |
28ccd296 ME |
910 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(trb->generic.field[3])); |
911 | ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3])); | |
912 | stream_id = TRB_TO_STREAM_ID(le32_to_cpu(trb->generic.field[2])); | |
ae636747 | 913 | dev = xhci->devs[slot_id]; |
e9df17eb SS |
914 | |
915 | ep_ring = xhci_stream_id_to_ring(dev, ep_index, stream_id); | |
916 | if (!ep_ring) { | |
917 | xhci_warn(xhci, "WARN Set TR deq ptr command for " | |
918 | "freed stream ID %u\n", | |
919 | stream_id); | |
920 | /* XXX: Harmless??? */ | |
921 | dev->eps[ep_index].ep_state &= ~SET_DEQ_PENDING; | |
922 | return; | |
923 | } | |
924 | ||
d115b048 JY |
925 | ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index); |
926 | slot_ctx = xhci_get_slot_ctx(xhci, dev->out_ctx); | |
ae636747 | 927 | |
28ccd296 | 928 | if (GET_COMP_CODE(le32_to_cpu(event->status)) != COMP_SUCCESS) { |
ae636747 SS |
929 | unsigned int ep_state; |
930 | unsigned int slot_state; | |
931 | ||
28ccd296 | 932 | switch (GET_COMP_CODE(le32_to_cpu(event->status))) { |
ae636747 SS |
933 | case COMP_TRB_ERR: |
934 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd invalid because " | |
935 | "of stream ID configuration\n"); | |
936 | break; | |
937 | case COMP_CTX_STATE: | |
938 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd failed due " | |
939 | "to incorrect slot or ep state.\n"); | |
28ccd296 | 940 | ep_state = le32_to_cpu(ep_ctx->ep_info); |
ae636747 | 941 | ep_state &= EP_STATE_MASK; |
28ccd296 | 942 | slot_state = le32_to_cpu(slot_ctx->dev_state); |
ae636747 SS |
943 | slot_state = GET_SLOT_STATE(slot_state); |
944 | xhci_dbg(xhci, "Slot state = %u, EP state = %u\n", | |
945 | slot_state, ep_state); | |
946 | break; | |
947 | case COMP_EBADSLT: | |
948 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd failed because " | |
949 | "slot %u was not enabled.\n", slot_id); | |
950 | break; | |
951 | default: | |
952 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd with unknown " | |
953 | "completion code of %u.\n", | |
28ccd296 | 954 | GET_COMP_CODE(le32_to_cpu(event->status))); |
ae636747 SS |
955 | break; |
956 | } | |
957 | /* OK what do we do now? The endpoint state is hosed, and we | |
958 | * should never get to this point if the synchronization between | |
959 | * queueing, and endpoint state are correct. This might happen | |
960 | * if the device gets disconnected after we've finished | |
961 | * cancelling URBs, which might not be an error... | |
962 | */ | |
963 | } else { | |
8e595a5d | 964 | xhci_dbg(xhci, "Successful Set TR Deq Ptr cmd, deq = @%08llx\n", |
28ccd296 | 965 | le64_to_cpu(ep_ctx->deq)); |
bf161e85 | 966 | if (xhci_trb_virt_to_dma(dev->eps[ep_index].queued_deq_seg, |
28ccd296 ME |
967 | dev->eps[ep_index].queued_deq_ptr) == |
968 | (le64_to_cpu(ep_ctx->deq) & ~(EP_CTX_CYCLE_MASK))) { | |
bf161e85 SS |
969 | /* Update the ring's dequeue segment and dequeue pointer |
970 | * to reflect the new position. | |
971 | */ | |
972 | ep_ring->deq_seg = dev->eps[ep_index].queued_deq_seg; | |
973 | ep_ring->dequeue = dev->eps[ep_index].queued_deq_ptr; | |
974 | } else { | |
975 | xhci_warn(xhci, "Mismatch between completed Set TR Deq " | |
976 | "Ptr command & xHCI internal state.\n"); | |
977 | xhci_warn(xhci, "ep deq seg = %p, deq ptr = %p\n", | |
978 | dev->eps[ep_index].queued_deq_seg, | |
979 | dev->eps[ep_index].queued_deq_ptr); | |
980 | } | |
ae636747 SS |
981 | } |
982 | ||
63a0d9ab | 983 | dev->eps[ep_index].ep_state &= ~SET_DEQ_PENDING; |
bf161e85 SS |
984 | dev->eps[ep_index].queued_deq_seg = NULL; |
985 | dev->eps[ep_index].queued_deq_ptr = NULL; | |
e9df17eb SS |
986 | /* Restart any rings with pending URBs */ |
987 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); | |
ae636747 SS |
988 | } |
989 | ||
a1587d97 SS |
990 | static void handle_reset_ep_completion(struct xhci_hcd *xhci, |
991 | struct xhci_event_cmd *event, | |
992 | union xhci_trb *trb) | |
993 | { | |
994 | int slot_id; | |
995 | unsigned int ep_index; | |
996 | ||
28ccd296 ME |
997 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(trb->generic.field[3])); |
998 | ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3])); | |
a1587d97 SS |
999 | /* This command will only fail if the endpoint wasn't halted, |
1000 | * but we don't care. | |
1001 | */ | |
1002 | xhci_dbg(xhci, "Ignoring reset ep completion code of %u\n", | |
28ccd296 | 1003 | (unsigned int) GET_COMP_CODE(le32_to_cpu(event->status))); |
a1587d97 | 1004 | |
ac9d8fe7 SS |
1005 | /* HW with the reset endpoint quirk needs to have a configure endpoint |
1006 | * command complete before the endpoint can be used. Queue that here | |
1007 | * because the HW can't handle two commands being queued in a row. | |
1008 | */ | |
1009 | if (xhci->quirks & XHCI_RESET_EP_QUIRK) { | |
1010 | xhci_dbg(xhci, "Queueing configure endpoint command\n"); | |
1011 | xhci_queue_configure_endpoint(xhci, | |
913a8a34 SS |
1012 | xhci->devs[slot_id]->in_ctx->dma, slot_id, |
1013 | false); | |
ac9d8fe7 SS |
1014 | xhci_ring_cmd_db(xhci); |
1015 | } else { | |
e9df17eb | 1016 | /* Clear our internal halted state and restart the ring(s) */ |
63a0d9ab | 1017 | xhci->devs[slot_id]->eps[ep_index].ep_state &= ~EP_HALTED; |
e9df17eb | 1018 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); |
ac9d8fe7 | 1019 | } |
a1587d97 | 1020 | } |
ae636747 | 1021 | |
a50c8aa9 SS |
1022 | /* Check to see if a command in the device's command queue matches this one. |
1023 | * Signal the completion or free the command, and return 1. Return 0 if the | |
1024 | * completed command isn't at the head of the command list. | |
1025 | */ | |
1026 | static int handle_cmd_in_cmd_wait_list(struct xhci_hcd *xhci, | |
1027 | struct xhci_virt_device *virt_dev, | |
1028 | struct xhci_event_cmd *event) | |
1029 | { | |
1030 | struct xhci_command *command; | |
1031 | ||
1032 | if (list_empty(&virt_dev->cmd_list)) | |
1033 | return 0; | |
1034 | ||
1035 | command = list_entry(virt_dev->cmd_list.next, | |
1036 | struct xhci_command, cmd_list); | |
1037 | if (xhci->cmd_ring->dequeue != command->command_trb) | |
1038 | return 0; | |
1039 | ||
28ccd296 | 1040 | command->status = GET_COMP_CODE(le32_to_cpu(event->status)); |
a50c8aa9 SS |
1041 | list_del(&command->cmd_list); |
1042 | if (command->completion) | |
1043 | complete(command->completion); | |
1044 | else | |
1045 | xhci_free_command(xhci, command); | |
1046 | return 1; | |
1047 | } | |
1048 | ||
7f84eef0 SS |
1049 | static void handle_cmd_completion(struct xhci_hcd *xhci, |
1050 | struct xhci_event_cmd *event) | |
1051 | { | |
28ccd296 | 1052 | int slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
7f84eef0 SS |
1053 | u64 cmd_dma; |
1054 | dma_addr_t cmd_dequeue_dma; | |
ac9d8fe7 | 1055 | struct xhci_input_control_ctx *ctrl_ctx; |
913a8a34 | 1056 | struct xhci_virt_device *virt_dev; |
ac9d8fe7 SS |
1057 | unsigned int ep_index; |
1058 | struct xhci_ring *ep_ring; | |
1059 | unsigned int ep_state; | |
7f84eef0 | 1060 | |
28ccd296 | 1061 | cmd_dma = le64_to_cpu(event->cmd_trb); |
23e3be11 | 1062 | cmd_dequeue_dma = xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg, |
7f84eef0 SS |
1063 | xhci->cmd_ring->dequeue); |
1064 | /* Is the command ring deq ptr out of sync with the deq seg ptr? */ | |
1065 | if (cmd_dequeue_dma == 0) { | |
1066 | xhci->error_bitmask |= 1 << 4; | |
1067 | return; | |
1068 | } | |
1069 | /* Does the DMA address match our internal dequeue pointer address? */ | |
1070 | if (cmd_dma != (u64) cmd_dequeue_dma) { | |
1071 | xhci->error_bitmask |= 1 << 5; | |
1072 | return; | |
1073 | } | |
28ccd296 ME |
1074 | switch (le32_to_cpu(xhci->cmd_ring->dequeue->generic.field[3]) |
1075 | & TRB_TYPE_BITMASK) { | |
3ffbba95 | 1076 | case TRB_TYPE(TRB_ENABLE_SLOT): |
28ccd296 | 1077 | if (GET_COMP_CODE(le32_to_cpu(event->status)) == COMP_SUCCESS) |
3ffbba95 SS |
1078 | xhci->slot_id = slot_id; |
1079 | else | |
1080 | xhci->slot_id = 0; | |
1081 | complete(&xhci->addr_dev); | |
1082 | break; | |
1083 | case TRB_TYPE(TRB_DISABLE_SLOT): | |
2cf95c18 SS |
1084 | if (xhci->devs[slot_id]) { |
1085 | if (xhci->quirks & XHCI_EP_LIMIT_QUIRK) | |
1086 | /* Delete default control endpoint resources */ | |
1087 | xhci_free_device_endpoint_resources(xhci, | |
1088 | xhci->devs[slot_id], true); | |
3ffbba95 | 1089 | xhci_free_virt_device(xhci, slot_id); |
2cf95c18 | 1090 | } |
3ffbba95 | 1091 | break; |
f94e0186 | 1092 | case TRB_TYPE(TRB_CONFIG_EP): |
913a8a34 | 1093 | virt_dev = xhci->devs[slot_id]; |
a50c8aa9 | 1094 | if (handle_cmd_in_cmd_wait_list(xhci, virt_dev, event)) |
913a8a34 | 1095 | break; |
ac9d8fe7 SS |
1096 | /* |
1097 | * Configure endpoint commands can come from the USB core | |
1098 | * configuration or alt setting changes, or because the HW | |
1099 | * needed an extra configure endpoint command after a reset | |
8df75f42 SS |
1100 | * endpoint command or streams were being configured. |
1101 | * If the command was for a halted endpoint, the xHCI driver | |
1102 | * is not waiting on the configure endpoint command. | |
ac9d8fe7 SS |
1103 | */ |
1104 | ctrl_ctx = xhci_get_input_control_ctx(xhci, | |
913a8a34 | 1105 | virt_dev->in_ctx); |
ac9d8fe7 | 1106 | /* Input ctx add_flags are the endpoint index plus one */ |
28ccd296 | 1107 | ep_index = xhci_last_valid_endpoint(le32_to_cpu(ctrl_ctx->add_flags)) - 1; |
06df5729 | 1108 | /* A usb_set_interface() call directly after clearing a halted |
e9df17eb SS |
1109 | * condition may race on this quirky hardware. Not worth |
1110 | * worrying about, since this is prototype hardware. Not sure | |
1111 | * if this will work for streams, but streams support was | |
1112 | * untested on this prototype. | |
06df5729 | 1113 | */ |
ac9d8fe7 | 1114 | if (xhci->quirks & XHCI_RESET_EP_QUIRK && |
06df5729 | 1115 | ep_index != (unsigned int) -1 && |
28ccd296 ME |
1116 | le32_to_cpu(ctrl_ctx->add_flags) - SLOT_FLAG == |
1117 | le32_to_cpu(ctrl_ctx->drop_flags)) { | |
06df5729 SS |
1118 | ep_ring = xhci->devs[slot_id]->eps[ep_index].ring; |
1119 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; | |
1120 | if (!(ep_state & EP_HALTED)) | |
1121 | goto bandwidth_change; | |
1122 | xhci_dbg(xhci, "Completed config ep cmd - " | |
1123 | "last ep index = %d, state = %d\n", | |
1124 | ep_index, ep_state); | |
e9df17eb | 1125 | /* Clear internal halted state and restart ring(s) */ |
63a0d9ab | 1126 | xhci->devs[slot_id]->eps[ep_index].ep_state &= |
ac9d8fe7 | 1127 | ~EP_HALTED; |
e9df17eb | 1128 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); |
06df5729 | 1129 | break; |
ac9d8fe7 | 1130 | } |
06df5729 SS |
1131 | bandwidth_change: |
1132 | xhci_dbg(xhci, "Completed config ep cmd\n"); | |
1133 | xhci->devs[slot_id]->cmd_status = | |
28ccd296 | 1134 | GET_COMP_CODE(le32_to_cpu(event->status)); |
06df5729 | 1135 | complete(&xhci->devs[slot_id]->cmd_completion); |
f94e0186 | 1136 | break; |
2d3f1fac | 1137 | case TRB_TYPE(TRB_EVAL_CONTEXT): |
ac1c1b7f SS |
1138 | virt_dev = xhci->devs[slot_id]; |
1139 | if (handle_cmd_in_cmd_wait_list(xhci, virt_dev, event)) | |
1140 | break; | |
28ccd296 | 1141 | xhci->devs[slot_id]->cmd_status = GET_COMP_CODE(le32_to_cpu(event->status)); |
2d3f1fac SS |
1142 | complete(&xhci->devs[slot_id]->cmd_completion); |
1143 | break; | |
3ffbba95 | 1144 | case TRB_TYPE(TRB_ADDR_DEV): |
28ccd296 | 1145 | xhci->devs[slot_id]->cmd_status = GET_COMP_CODE(le32_to_cpu(event->status)); |
3ffbba95 SS |
1146 | complete(&xhci->addr_dev); |
1147 | break; | |
ae636747 | 1148 | case TRB_TYPE(TRB_STOP_RING): |
be88fe4f | 1149 | handle_stopped_endpoint(xhci, xhci->cmd_ring->dequeue, event); |
ae636747 SS |
1150 | break; |
1151 | case TRB_TYPE(TRB_SET_DEQ): | |
1152 | handle_set_deq_completion(xhci, event, xhci->cmd_ring->dequeue); | |
1153 | break; | |
7f84eef0 | 1154 | case TRB_TYPE(TRB_CMD_NOOP): |
7f84eef0 | 1155 | break; |
a1587d97 SS |
1156 | case TRB_TYPE(TRB_RESET_EP): |
1157 | handle_reset_ep_completion(xhci, event, xhci->cmd_ring->dequeue); | |
1158 | break; | |
2a8f82c4 SS |
1159 | case TRB_TYPE(TRB_RESET_DEV): |
1160 | xhci_dbg(xhci, "Completed reset device command.\n"); | |
1161 | slot_id = TRB_TO_SLOT_ID( | |
28ccd296 | 1162 | le32_to_cpu(xhci->cmd_ring->dequeue->generic.field[3])); |
2a8f82c4 SS |
1163 | virt_dev = xhci->devs[slot_id]; |
1164 | if (virt_dev) | |
1165 | handle_cmd_in_cmd_wait_list(xhci, virt_dev, event); | |
1166 | else | |
1167 | xhci_warn(xhci, "Reset device command completion " | |
1168 | "for disabled slot %u\n", slot_id); | |
1169 | break; | |
0238634d SS |
1170 | case TRB_TYPE(TRB_NEC_GET_FW): |
1171 | if (!(xhci->quirks & XHCI_NEC_HOST)) { | |
1172 | xhci->error_bitmask |= 1 << 6; | |
1173 | break; | |
1174 | } | |
1175 | xhci_dbg(xhci, "NEC firmware version %2x.%02x\n", | |
28ccd296 ME |
1176 | NEC_FW_MAJOR(le32_to_cpu(event->status)), |
1177 | NEC_FW_MINOR(le32_to_cpu(event->status))); | |
0238634d | 1178 | break; |
7f84eef0 SS |
1179 | default: |
1180 | /* Skip over unknown commands on the event ring */ | |
1181 | xhci->error_bitmask |= 1 << 6; | |
1182 | break; | |
1183 | } | |
1184 | inc_deq(xhci, xhci->cmd_ring, false); | |
1185 | } | |
1186 | ||
0238634d SS |
1187 | static void handle_vendor_event(struct xhci_hcd *xhci, |
1188 | union xhci_trb *event) | |
1189 | { | |
1190 | u32 trb_type; | |
1191 | ||
28ccd296 | 1192 | trb_type = TRB_FIELD_TO_TYPE(le32_to_cpu(event->generic.field[3])); |
0238634d SS |
1193 | xhci_dbg(xhci, "Vendor specific event TRB type = %u\n", trb_type); |
1194 | if (trb_type == TRB_NEC_CMD_COMP && (xhci->quirks & XHCI_NEC_HOST)) | |
1195 | handle_cmd_completion(xhci, &event->event_cmd); | |
1196 | } | |
1197 | ||
f6ff0ac8 SS |
1198 | /* @port_id: the one-based port ID from the hardware (indexed from array of all |
1199 | * port registers -- USB 3.0 and USB 2.0). | |
1200 | * | |
1201 | * Returns a zero-based port number, which is suitable for indexing into each of | |
1202 | * the split roothubs' port arrays and bus state arrays. | |
1203 | */ | |
1204 | static unsigned int find_faked_portnum_from_hw_portnum(struct usb_hcd *hcd, | |
1205 | struct xhci_hcd *xhci, u32 port_id) | |
1206 | { | |
1207 | unsigned int i; | |
1208 | unsigned int num_similar_speed_ports = 0; | |
1209 | ||
1210 | /* port_id from the hardware is 1-based, but port_array[], usb3_ports[], | |
1211 | * and usb2_ports are 0-based indexes. Count the number of similar | |
1212 | * speed ports, up to 1 port before this port. | |
1213 | */ | |
1214 | for (i = 0; i < (port_id - 1); i++) { | |
1215 | u8 port_speed = xhci->port_array[i]; | |
1216 | ||
1217 | /* | |
1218 | * Skip ports that don't have known speeds, or have duplicate | |
1219 | * Extended Capabilities port speed entries. | |
1220 | */ | |
22e04870 | 1221 | if (port_speed == 0 || port_speed == DUPLICATE_ENTRY) |
f6ff0ac8 SS |
1222 | continue; |
1223 | ||
1224 | /* | |
1225 | * USB 3.0 ports are always under a USB 3.0 hub. USB 2.0 and | |
1226 | * 1.1 ports are under the USB 2.0 hub. If the port speed | |
1227 | * matches the device speed, it's a similar speed port. | |
1228 | */ | |
1229 | if ((port_speed == 0x03) == (hcd->speed == HCD_USB3)) | |
1230 | num_similar_speed_ports++; | |
1231 | } | |
1232 | return num_similar_speed_ports; | |
1233 | } | |
1234 | ||
0f2a7930 SS |
1235 | static void handle_port_status(struct xhci_hcd *xhci, |
1236 | union xhci_trb *event) | |
1237 | { | |
f6ff0ac8 | 1238 | struct usb_hcd *hcd; |
0f2a7930 | 1239 | u32 port_id; |
56192531 | 1240 | u32 temp, temp1; |
518e848e | 1241 | int max_ports; |
56192531 | 1242 | int slot_id; |
5308a91b | 1243 | unsigned int faked_port_index; |
f6ff0ac8 | 1244 | u8 major_revision; |
20b67cf5 | 1245 | struct xhci_bus_state *bus_state; |
28ccd296 | 1246 | __le32 __iomem **port_array; |
386139d7 | 1247 | bool bogus_port_status = false; |
0f2a7930 SS |
1248 | |
1249 | /* Port status change events always have a successful completion code */ | |
28ccd296 | 1250 | if (GET_COMP_CODE(le32_to_cpu(event->generic.field[2])) != COMP_SUCCESS) { |
0f2a7930 SS |
1251 | xhci_warn(xhci, "WARN: xHC returned failed port status event\n"); |
1252 | xhci->error_bitmask |= 1 << 8; | |
1253 | } | |
28ccd296 | 1254 | port_id = GET_PORT_ID(le32_to_cpu(event->generic.field[0])); |
0f2a7930 SS |
1255 | xhci_dbg(xhci, "Port Status Change Event for port %d\n", port_id); |
1256 | ||
518e848e SS |
1257 | max_ports = HCS_MAX_PORTS(xhci->hcs_params1); |
1258 | if ((port_id <= 0) || (port_id > max_ports)) { | |
56192531 | 1259 | xhci_warn(xhci, "Invalid port id %d\n", port_id); |
386139d7 | 1260 | bogus_port_status = true; |
56192531 AX |
1261 | goto cleanup; |
1262 | } | |
1263 | ||
f6ff0ac8 SS |
1264 | /* Figure out which usb_hcd this port is attached to: |
1265 | * is it a USB 3.0 port or a USB 2.0/1.1 port? | |
1266 | */ | |
1267 | major_revision = xhci->port_array[port_id - 1]; | |
1268 | if (major_revision == 0) { | |
1269 | xhci_warn(xhci, "Event for port %u not in " | |
1270 | "Extended Capabilities, ignoring.\n", | |
1271 | port_id); | |
386139d7 | 1272 | bogus_port_status = true; |
f6ff0ac8 | 1273 | goto cleanup; |
5308a91b | 1274 | } |
22e04870 | 1275 | if (major_revision == DUPLICATE_ENTRY) { |
f6ff0ac8 SS |
1276 | xhci_warn(xhci, "Event for port %u duplicated in" |
1277 | "Extended Capabilities, ignoring.\n", | |
1278 | port_id); | |
386139d7 | 1279 | bogus_port_status = true; |
f6ff0ac8 SS |
1280 | goto cleanup; |
1281 | } | |
1282 | ||
1283 | /* | |
1284 | * Hardware port IDs reported by a Port Status Change Event include USB | |
1285 | * 3.0 and USB 2.0 ports. We want to check if the port has reported a | |
1286 | * resume event, but we first need to translate the hardware port ID | |
1287 | * into the index into the ports on the correct split roothub, and the | |
1288 | * correct bus_state structure. | |
1289 | */ | |
1290 | /* Find the right roothub. */ | |
1291 | hcd = xhci_to_hcd(xhci); | |
1292 | if ((major_revision == 0x03) != (hcd->speed == HCD_USB3)) | |
1293 | hcd = xhci->shared_hcd; | |
1294 | bus_state = &xhci->bus_state[hcd_index(hcd)]; | |
1295 | if (hcd->speed == HCD_USB3) | |
1296 | port_array = xhci->usb3_ports; | |
1297 | else | |
1298 | port_array = xhci->usb2_ports; | |
1299 | /* Find the faked port hub number */ | |
1300 | faked_port_index = find_faked_portnum_from_hw_portnum(hcd, xhci, | |
1301 | port_id); | |
5308a91b | 1302 | |
5308a91b | 1303 | temp = xhci_readl(xhci, port_array[faked_port_index]); |
7111ebc9 | 1304 | if (hcd->state == HC_STATE_SUSPENDED) { |
56192531 AX |
1305 | xhci_dbg(xhci, "resume root hub\n"); |
1306 | usb_hcd_resume_root_hub(hcd); | |
1307 | } | |
1308 | ||
1309 | if ((temp & PORT_PLC) && (temp & PORT_PLS_MASK) == XDEV_RESUME) { | |
1310 | xhci_dbg(xhci, "port resume event for port %d\n", port_id); | |
1311 | ||
1312 | temp1 = xhci_readl(xhci, &xhci->op_regs->command); | |
1313 | if (!(temp1 & CMD_RUN)) { | |
1314 | xhci_warn(xhci, "xHC is not running.\n"); | |
1315 | goto cleanup; | |
1316 | } | |
1317 | ||
1318 | if (DEV_SUPERSPEED(temp)) { | |
1319 | xhci_dbg(xhci, "resume SS port %d\n", port_id); | |
1320 | temp = xhci_port_state_to_neutral(temp); | |
1321 | temp &= ~PORT_PLS_MASK; | |
1322 | temp |= PORT_LINK_STROBE | XDEV_U0; | |
5308a91b | 1323 | xhci_writel(xhci, temp, port_array[faked_port_index]); |
5233630f SS |
1324 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
1325 | faked_port_index); | |
56192531 AX |
1326 | if (!slot_id) { |
1327 | xhci_dbg(xhci, "slot_id is zero\n"); | |
1328 | goto cleanup; | |
1329 | } | |
1330 | xhci_ring_device(xhci, slot_id); | |
1331 | xhci_dbg(xhci, "resume SS port %d finished\n", port_id); | |
1332 | /* Clear PORT_PLC */ | |
5308a91b | 1333 | temp = xhci_readl(xhci, port_array[faked_port_index]); |
56192531 AX |
1334 | temp = xhci_port_state_to_neutral(temp); |
1335 | temp |= PORT_PLC; | |
5308a91b | 1336 | xhci_writel(xhci, temp, port_array[faked_port_index]); |
56192531 AX |
1337 | } else { |
1338 | xhci_dbg(xhci, "resume HS port %d\n", port_id); | |
f6ff0ac8 | 1339 | bus_state->resume_done[faked_port_index] = jiffies + |
56192531 AX |
1340 | msecs_to_jiffies(20); |
1341 | mod_timer(&hcd->rh_timer, | |
f6ff0ac8 | 1342 | bus_state->resume_done[faked_port_index]); |
56192531 AX |
1343 | /* Do the rest in GetPortStatus */ |
1344 | } | |
1345 | } | |
1346 | ||
1347 | cleanup: | |
0f2a7930 SS |
1348 | /* Update event ring dequeue pointer before dropping the lock */ |
1349 | inc_deq(xhci, xhci->event_ring, true); | |
0f2a7930 | 1350 | |
386139d7 SS |
1351 | /* Don't make the USB core poll the roothub if we got a bad port status |
1352 | * change event. Besides, at that point we can't tell which roothub | |
1353 | * (USB 2.0 or USB 3.0) to kick. | |
1354 | */ | |
1355 | if (bogus_port_status) | |
1356 | return; | |
1357 | ||
0f2a7930 SS |
1358 | spin_unlock(&xhci->lock); |
1359 | /* Pass this up to the core */ | |
f6ff0ac8 | 1360 | usb_hcd_poll_rh_status(hcd); |
0f2a7930 SS |
1361 | spin_lock(&xhci->lock); |
1362 | } | |
1363 | ||
d0e96f5a SS |
1364 | /* |
1365 | * This TD is defined by the TRBs starting at start_trb in start_seg and ending | |
1366 | * at end_trb, which may be in another segment. If the suspect DMA address is a | |
1367 | * TRB in this TD, this function returns that TRB's segment. Otherwise it | |
1368 | * returns 0. | |
1369 | */ | |
6648f29d | 1370 | struct xhci_segment *trb_in_td(struct xhci_segment *start_seg, |
d0e96f5a SS |
1371 | union xhci_trb *start_trb, |
1372 | union xhci_trb *end_trb, | |
1373 | dma_addr_t suspect_dma) | |
1374 | { | |
1375 | dma_addr_t start_dma; | |
1376 | dma_addr_t end_seg_dma; | |
1377 | dma_addr_t end_trb_dma; | |
1378 | struct xhci_segment *cur_seg; | |
1379 | ||
23e3be11 | 1380 | start_dma = xhci_trb_virt_to_dma(start_seg, start_trb); |
d0e96f5a SS |
1381 | cur_seg = start_seg; |
1382 | ||
1383 | do { | |
2fa88daa | 1384 | if (start_dma == 0) |
326b4810 | 1385 | return NULL; |
ae636747 | 1386 | /* We may get an event for a Link TRB in the middle of a TD */ |
23e3be11 | 1387 | end_seg_dma = xhci_trb_virt_to_dma(cur_seg, |
2fa88daa | 1388 | &cur_seg->trbs[TRBS_PER_SEGMENT - 1]); |
d0e96f5a | 1389 | /* If the end TRB isn't in this segment, this is set to 0 */ |
23e3be11 | 1390 | end_trb_dma = xhci_trb_virt_to_dma(cur_seg, end_trb); |
d0e96f5a SS |
1391 | |
1392 | if (end_trb_dma > 0) { | |
1393 | /* The end TRB is in this segment, so suspect should be here */ | |
1394 | if (start_dma <= end_trb_dma) { | |
1395 | if (suspect_dma >= start_dma && suspect_dma <= end_trb_dma) | |
1396 | return cur_seg; | |
1397 | } else { | |
1398 | /* Case for one segment with | |
1399 | * a TD wrapped around to the top | |
1400 | */ | |
1401 | if ((suspect_dma >= start_dma && | |
1402 | suspect_dma <= end_seg_dma) || | |
1403 | (suspect_dma >= cur_seg->dma && | |
1404 | suspect_dma <= end_trb_dma)) | |
1405 | return cur_seg; | |
1406 | } | |
326b4810 | 1407 | return NULL; |
d0e96f5a SS |
1408 | } else { |
1409 | /* Might still be somewhere in this segment */ | |
1410 | if (suspect_dma >= start_dma && suspect_dma <= end_seg_dma) | |
1411 | return cur_seg; | |
1412 | } | |
1413 | cur_seg = cur_seg->next; | |
23e3be11 | 1414 | start_dma = xhci_trb_virt_to_dma(cur_seg, &cur_seg->trbs[0]); |
2fa88daa | 1415 | } while (cur_seg != start_seg); |
d0e96f5a | 1416 | |
326b4810 | 1417 | return NULL; |
d0e96f5a SS |
1418 | } |
1419 | ||
bcef3fd5 SS |
1420 | static void xhci_cleanup_halted_endpoint(struct xhci_hcd *xhci, |
1421 | unsigned int slot_id, unsigned int ep_index, | |
e9df17eb | 1422 | unsigned int stream_id, |
bcef3fd5 SS |
1423 | struct xhci_td *td, union xhci_trb *event_trb) |
1424 | { | |
1425 | struct xhci_virt_ep *ep = &xhci->devs[slot_id]->eps[ep_index]; | |
1426 | ep->ep_state |= EP_HALTED; | |
1427 | ep->stopped_td = td; | |
1428 | ep->stopped_trb = event_trb; | |
e9df17eb | 1429 | ep->stopped_stream = stream_id; |
1624ae1c | 1430 | |
bcef3fd5 SS |
1431 | xhci_queue_reset_ep(xhci, slot_id, ep_index); |
1432 | xhci_cleanup_stalled_ring(xhci, td->urb->dev, ep_index); | |
1624ae1c SS |
1433 | |
1434 | ep->stopped_td = NULL; | |
1435 | ep->stopped_trb = NULL; | |
5e5cf6fc | 1436 | ep->stopped_stream = 0; |
1624ae1c | 1437 | |
bcef3fd5 SS |
1438 | xhci_ring_cmd_db(xhci); |
1439 | } | |
1440 | ||
1441 | /* Check if an error has halted the endpoint ring. The class driver will | |
1442 | * cleanup the halt for a non-default control endpoint if we indicate a stall. | |
1443 | * However, a babble and other errors also halt the endpoint ring, and the class | |
1444 | * driver won't clear the halt in that case, so we need to issue a Set Transfer | |
1445 | * Ring Dequeue Pointer command manually. | |
1446 | */ | |
1447 | static int xhci_requires_manual_halt_cleanup(struct xhci_hcd *xhci, | |
1448 | struct xhci_ep_ctx *ep_ctx, | |
1449 | unsigned int trb_comp_code) | |
1450 | { | |
1451 | /* TRB completion codes that may require a manual halt cleanup */ | |
1452 | if (trb_comp_code == COMP_TX_ERR || | |
1453 | trb_comp_code == COMP_BABBLE || | |
1454 | trb_comp_code == COMP_SPLIT_ERR) | |
1455 | /* The 0.96 spec says a babbling control endpoint | |
1456 | * is not halted. The 0.96 spec says it is. Some HW | |
1457 | * claims to be 0.95 compliant, but it halts the control | |
1458 | * endpoint anyway. Check if a babble halted the | |
1459 | * endpoint. | |
1460 | */ | |
28ccd296 | 1461 | if ((le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK) == EP_STATE_HALTED) |
bcef3fd5 SS |
1462 | return 1; |
1463 | ||
1464 | return 0; | |
1465 | } | |
1466 | ||
b45b5069 SS |
1467 | int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code) |
1468 | { | |
1469 | if (trb_comp_code >= 224 && trb_comp_code <= 255) { | |
1470 | /* Vendor defined "informational" completion code, | |
1471 | * treat as not-an-error. | |
1472 | */ | |
1473 | xhci_dbg(xhci, "Vendor defined info completion code %u\n", | |
1474 | trb_comp_code); | |
1475 | xhci_dbg(xhci, "Treating code as success.\n"); | |
1476 | return 1; | |
1477 | } | |
1478 | return 0; | |
1479 | } | |
1480 | ||
4422da61 AX |
1481 | /* |
1482 | * Finish the td processing, remove the td from td list; | |
1483 | * Return 1 if the urb can be given back. | |
1484 | */ | |
1485 | static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
1486 | union xhci_trb *event_trb, struct xhci_transfer_event *event, | |
1487 | struct xhci_virt_ep *ep, int *status, bool skip) | |
1488 | { | |
1489 | struct xhci_virt_device *xdev; | |
1490 | struct xhci_ring *ep_ring; | |
1491 | unsigned int slot_id; | |
1492 | int ep_index; | |
1493 | struct urb *urb = NULL; | |
1494 | struct xhci_ep_ctx *ep_ctx; | |
1495 | int ret = 0; | |
8e51adcc | 1496 | struct urb_priv *urb_priv; |
4422da61 AX |
1497 | u32 trb_comp_code; |
1498 | ||
28ccd296 | 1499 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
4422da61 | 1500 | xdev = xhci->devs[slot_id]; |
28ccd296 ME |
1501 | ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1; |
1502 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); | |
4422da61 | 1503 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
28ccd296 | 1504 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); |
4422da61 AX |
1505 | |
1506 | if (skip) | |
1507 | goto td_cleanup; | |
1508 | ||
1509 | if (trb_comp_code == COMP_STOP_INVAL || | |
1510 | trb_comp_code == COMP_STOP) { | |
1511 | /* The Endpoint Stop Command completion will take care of any | |
1512 | * stopped TDs. A stopped TD may be restarted, so don't update | |
1513 | * the ring dequeue pointer or take this TD off any lists yet. | |
1514 | */ | |
1515 | ep->stopped_td = td; | |
1516 | ep->stopped_trb = event_trb; | |
1517 | return 0; | |
1518 | } else { | |
1519 | if (trb_comp_code == COMP_STALL) { | |
1520 | /* The transfer is completed from the driver's | |
1521 | * perspective, but we need to issue a set dequeue | |
1522 | * command for this stalled endpoint to move the dequeue | |
1523 | * pointer past the TD. We can't do that here because | |
1524 | * the halt condition must be cleared first. Let the | |
1525 | * USB class driver clear the stall later. | |
1526 | */ | |
1527 | ep->stopped_td = td; | |
1528 | ep->stopped_trb = event_trb; | |
1529 | ep->stopped_stream = ep_ring->stream_id; | |
1530 | } else if (xhci_requires_manual_halt_cleanup(xhci, | |
1531 | ep_ctx, trb_comp_code)) { | |
1532 | /* Other types of errors halt the endpoint, but the | |
1533 | * class driver doesn't call usb_reset_endpoint() unless | |
1534 | * the error is -EPIPE. Clear the halted status in the | |
1535 | * xHCI hardware manually. | |
1536 | */ | |
1537 | xhci_cleanup_halted_endpoint(xhci, | |
1538 | slot_id, ep_index, ep_ring->stream_id, | |
1539 | td, event_trb); | |
1540 | } else { | |
1541 | /* Update ring dequeue pointer */ | |
1542 | while (ep_ring->dequeue != td->last_trb) | |
1543 | inc_deq(xhci, ep_ring, false); | |
1544 | inc_deq(xhci, ep_ring, false); | |
1545 | } | |
1546 | ||
1547 | td_cleanup: | |
1548 | /* Clean up the endpoint's TD list */ | |
1549 | urb = td->urb; | |
8e51adcc | 1550 | urb_priv = urb->hcpriv; |
4422da61 AX |
1551 | |
1552 | /* Do one last check of the actual transfer length. | |
1553 | * If the host controller said we transferred more data than | |
1554 | * the buffer length, urb->actual_length will be a very big | |
1555 | * number (since it's unsigned). Play it safe and say we didn't | |
1556 | * transfer anything. | |
1557 | */ | |
1558 | if (urb->actual_length > urb->transfer_buffer_length) { | |
1559 | xhci_warn(xhci, "URB transfer length is wrong, " | |
1560 | "xHC issue? req. len = %u, " | |
1561 | "act. len = %u\n", | |
1562 | urb->transfer_buffer_length, | |
1563 | urb->actual_length); | |
1564 | urb->actual_length = 0; | |
1565 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) | |
1566 | *status = -EREMOTEIO; | |
1567 | else | |
1568 | *status = 0; | |
1569 | } | |
1570 | list_del(&td->td_list); | |
1571 | /* Was this TD slated to be cancelled but completed anyway? */ | |
1572 | if (!list_empty(&td->cancelled_td_list)) | |
1573 | list_del(&td->cancelled_td_list); | |
1574 | ||
8e51adcc AX |
1575 | urb_priv->td_cnt++; |
1576 | /* Giveback the urb when all the tds are completed */ | |
c41136b0 | 1577 | if (urb_priv->td_cnt == urb_priv->length) { |
8e51adcc | 1578 | ret = 1; |
c41136b0 AX |
1579 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
1580 | xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs--; | |
1581 | if (xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs | |
1582 | == 0) { | |
1583 | if (xhci->quirks & XHCI_AMD_PLL_FIX) | |
1584 | usb_amd_quirk_pll_enable(); | |
1585 | } | |
1586 | } | |
1587 | } | |
4422da61 AX |
1588 | } |
1589 | ||
1590 | return ret; | |
1591 | } | |
1592 | ||
8af56be1 AX |
1593 | /* |
1594 | * Process control tds, update urb status and actual_length. | |
1595 | */ | |
1596 | static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
1597 | union xhci_trb *event_trb, struct xhci_transfer_event *event, | |
1598 | struct xhci_virt_ep *ep, int *status) | |
1599 | { | |
1600 | struct xhci_virt_device *xdev; | |
1601 | struct xhci_ring *ep_ring; | |
1602 | unsigned int slot_id; | |
1603 | int ep_index; | |
1604 | struct xhci_ep_ctx *ep_ctx; | |
1605 | u32 trb_comp_code; | |
1606 | ||
28ccd296 | 1607 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
8af56be1 | 1608 | xdev = xhci->devs[slot_id]; |
28ccd296 ME |
1609 | ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1; |
1610 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); | |
8af56be1 | 1611 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
28ccd296 | 1612 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); |
8af56be1 AX |
1613 | |
1614 | xhci_debug_trb(xhci, xhci->event_ring->dequeue); | |
1615 | switch (trb_comp_code) { | |
1616 | case COMP_SUCCESS: | |
1617 | if (event_trb == ep_ring->dequeue) { | |
1618 | xhci_warn(xhci, "WARN: Success on ctrl setup TRB " | |
1619 | "without IOC set??\n"); | |
1620 | *status = -ESHUTDOWN; | |
1621 | } else if (event_trb != td->last_trb) { | |
1622 | xhci_warn(xhci, "WARN: Success on ctrl data TRB " | |
1623 | "without IOC set??\n"); | |
1624 | *status = -ESHUTDOWN; | |
1625 | } else { | |
8af56be1 AX |
1626 | *status = 0; |
1627 | } | |
1628 | break; | |
1629 | case COMP_SHORT_TX: | |
1630 | xhci_warn(xhci, "WARN: short transfer on control ep\n"); | |
1631 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) | |
1632 | *status = -EREMOTEIO; | |
1633 | else | |
1634 | *status = 0; | |
1635 | break; | |
3abeca99 SS |
1636 | case COMP_STOP_INVAL: |
1637 | case COMP_STOP: | |
1638 | return finish_td(xhci, td, event_trb, event, ep, status, false); | |
8af56be1 AX |
1639 | default: |
1640 | if (!xhci_requires_manual_halt_cleanup(xhci, | |
1641 | ep_ctx, trb_comp_code)) | |
1642 | break; | |
1643 | xhci_dbg(xhci, "TRB error code %u, " | |
1644 | "halted endpoint index = %u\n", | |
1645 | trb_comp_code, ep_index); | |
1646 | /* else fall through */ | |
1647 | case COMP_STALL: | |
1648 | /* Did we transfer part of the data (middle) phase? */ | |
1649 | if (event_trb != ep_ring->dequeue && | |
1650 | event_trb != td->last_trb) | |
1651 | td->urb->actual_length = | |
1652 | td->urb->transfer_buffer_length | |
28ccd296 | 1653 | - TRB_LEN(le32_to_cpu(event->transfer_len)); |
8af56be1 AX |
1654 | else |
1655 | td->urb->actual_length = 0; | |
1656 | ||
1657 | xhci_cleanup_halted_endpoint(xhci, | |
1658 | slot_id, ep_index, 0, td, event_trb); | |
1659 | return finish_td(xhci, td, event_trb, event, ep, status, true); | |
1660 | } | |
1661 | /* | |
1662 | * Did we transfer any data, despite the errors that might have | |
1663 | * happened? I.e. did we get past the setup stage? | |
1664 | */ | |
1665 | if (event_trb != ep_ring->dequeue) { | |
1666 | /* The event was for the status stage */ | |
1667 | if (event_trb == td->last_trb) { | |
1668 | if (td->urb->actual_length != 0) { | |
1669 | /* Don't overwrite a previously set error code | |
1670 | */ | |
1671 | if ((*status == -EINPROGRESS || *status == 0) && | |
1672 | (td->urb->transfer_flags | |
1673 | & URB_SHORT_NOT_OK)) | |
1674 | /* Did we already see a short data | |
1675 | * stage? */ | |
1676 | *status = -EREMOTEIO; | |
1677 | } else { | |
1678 | td->urb->actual_length = | |
1679 | td->urb->transfer_buffer_length; | |
1680 | } | |
1681 | } else { | |
1682 | /* Maybe the event was for the data stage? */ | |
3abeca99 SS |
1683 | td->urb->actual_length = |
1684 | td->urb->transfer_buffer_length - | |
1685 | TRB_LEN(le32_to_cpu(event->transfer_len)); | |
1686 | xhci_dbg(xhci, "Waiting for status " | |
1687 | "stage event\n"); | |
1688 | return 0; | |
8af56be1 AX |
1689 | } |
1690 | } | |
1691 | ||
1692 | return finish_td(xhci, td, event_trb, event, ep, status, false); | |
1693 | } | |
1694 | ||
04e51901 AX |
1695 | /* |
1696 | * Process isochronous tds, update urb packet status and actual_length. | |
1697 | */ | |
1698 | static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
1699 | union xhci_trb *event_trb, struct xhci_transfer_event *event, | |
1700 | struct xhci_virt_ep *ep, int *status) | |
1701 | { | |
1702 | struct xhci_ring *ep_ring; | |
1703 | struct urb_priv *urb_priv; | |
1704 | int idx; | |
1705 | int len = 0; | |
04e51901 AX |
1706 | union xhci_trb *cur_trb; |
1707 | struct xhci_segment *cur_seg; | |
926008c9 | 1708 | struct usb_iso_packet_descriptor *frame; |
04e51901 | 1709 | u32 trb_comp_code; |
926008c9 | 1710 | bool skip_td = false; |
04e51901 | 1711 | |
28ccd296 ME |
1712 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
1713 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); | |
04e51901 AX |
1714 | urb_priv = td->urb->hcpriv; |
1715 | idx = urb_priv->td_cnt; | |
926008c9 | 1716 | frame = &td->urb->iso_frame_desc[idx]; |
04e51901 | 1717 | |
926008c9 DT |
1718 | /* handle completion code */ |
1719 | switch (trb_comp_code) { | |
1720 | case COMP_SUCCESS: | |
1721 | frame->status = 0; | |
926008c9 DT |
1722 | break; |
1723 | case COMP_SHORT_TX: | |
1724 | frame->status = td->urb->transfer_flags & URB_SHORT_NOT_OK ? | |
1725 | -EREMOTEIO : 0; | |
1726 | break; | |
1727 | case COMP_BW_OVER: | |
1728 | frame->status = -ECOMM; | |
1729 | skip_td = true; | |
1730 | break; | |
1731 | case COMP_BUFF_OVER: | |
1732 | case COMP_BABBLE: | |
1733 | frame->status = -EOVERFLOW; | |
1734 | skip_td = true; | |
1735 | break; | |
1736 | case COMP_STALL: | |
1737 | frame->status = -EPROTO; | |
1738 | skip_td = true; | |
1739 | break; | |
1740 | case COMP_STOP: | |
1741 | case COMP_STOP_INVAL: | |
1742 | break; | |
1743 | default: | |
1744 | frame->status = -1; | |
1745 | break; | |
04e51901 AX |
1746 | } |
1747 | ||
926008c9 DT |
1748 | if (trb_comp_code == COMP_SUCCESS || skip_td) { |
1749 | frame->actual_length = frame->length; | |
1750 | td->urb->actual_length += frame->length; | |
04e51901 AX |
1751 | } else { |
1752 | for (cur_trb = ep_ring->dequeue, | |
1753 | cur_seg = ep_ring->deq_seg; cur_trb != event_trb; | |
1754 | next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) { | |
28ccd296 | 1755 | if ((le32_to_cpu(cur_trb->generic.field[3]) & |
04e51901 | 1756 | TRB_TYPE_BITMASK) != TRB_TYPE(TRB_TR_NOOP) && |
28ccd296 | 1757 | (le32_to_cpu(cur_trb->generic.field[3]) & |
04e51901 | 1758 | TRB_TYPE_BITMASK) != TRB_TYPE(TRB_LINK)) |
28ccd296 | 1759 | len += TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])); |
04e51901 | 1760 | } |
28ccd296 ME |
1761 | len += TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])) - |
1762 | TRB_LEN(le32_to_cpu(event->transfer_len)); | |
04e51901 AX |
1763 | |
1764 | if (trb_comp_code != COMP_STOP_INVAL) { | |
926008c9 | 1765 | frame->actual_length = len; |
04e51901 AX |
1766 | td->urb->actual_length += len; |
1767 | } | |
1768 | } | |
1769 | ||
1770 | if ((idx == urb_priv->length - 1) && *status == -EINPROGRESS) | |
1771 | *status = 0; | |
1772 | ||
1773 | return finish_td(xhci, td, event_trb, event, ep, status, false); | |
1774 | } | |
1775 | ||
926008c9 DT |
1776 | static int skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td, |
1777 | struct xhci_transfer_event *event, | |
1778 | struct xhci_virt_ep *ep, int *status) | |
1779 | { | |
1780 | struct xhci_ring *ep_ring; | |
1781 | struct urb_priv *urb_priv; | |
1782 | struct usb_iso_packet_descriptor *frame; | |
1783 | int idx; | |
1784 | ||
f6975314 | 1785 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
926008c9 DT |
1786 | urb_priv = td->urb->hcpriv; |
1787 | idx = urb_priv->td_cnt; | |
1788 | frame = &td->urb->iso_frame_desc[idx]; | |
1789 | ||
1790 | /* The transfer is partly done */ | |
1791 | *status = -EXDEV; | |
1792 | frame->status = -EXDEV; | |
1793 | ||
1794 | /* calc actual length */ | |
1795 | frame->actual_length = 0; | |
1796 | ||
1797 | /* Update ring dequeue pointer */ | |
1798 | while (ep_ring->dequeue != td->last_trb) | |
1799 | inc_deq(xhci, ep_ring, false); | |
1800 | inc_deq(xhci, ep_ring, false); | |
1801 | ||
1802 | return finish_td(xhci, td, NULL, event, ep, status, true); | |
1803 | } | |
1804 | ||
22405ed2 AX |
1805 | /* |
1806 | * Process bulk and interrupt tds, update urb status and actual_length. | |
1807 | */ | |
1808 | static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
1809 | union xhci_trb *event_trb, struct xhci_transfer_event *event, | |
1810 | struct xhci_virt_ep *ep, int *status) | |
1811 | { | |
1812 | struct xhci_ring *ep_ring; | |
1813 | union xhci_trb *cur_trb; | |
1814 | struct xhci_segment *cur_seg; | |
1815 | u32 trb_comp_code; | |
1816 | ||
28ccd296 ME |
1817 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
1818 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); | |
22405ed2 AX |
1819 | |
1820 | switch (trb_comp_code) { | |
1821 | case COMP_SUCCESS: | |
1822 | /* Double check that the HW transferred everything. */ | |
1823 | if (event_trb != td->last_trb) { | |
1824 | xhci_warn(xhci, "WARN Successful completion " | |
1825 | "on short TX\n"); | |
1826 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) | |
1827 | *status = -EREMOTEIO; | |
1828 | else | |
1829 | *status = 0; | |
1830 | } else { | |
22405ed2 AX |
1831 | *status = 0; |
1832 | } | |
1833 | break; | |
1834 | case COMP_SHORT_TX: | |
1835 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) | |
1836 | *status = -EREMOTEIO; | |
1837 | else | |
1838 | *status = 0; | |
1839 | break; | |
1840 | default: | |
1841 | /* Others already handled above */ | |
1842 | break; | |
1843 | } | |
f444ff27 SS |
1844 | if (trb_comp_code == COMP_SHORT_TX) |
1845 | xhci_dbg(xhci, "ep %#x - asked for %d bytes, " | |
1846 | "%d bytes untransferred\n", | |
1847 | td->urb->ep->desc.bEndpointAddress, | |
1848 | td->urb->transfer_buffer_length, | |
1849 | TRB_LEN(le32_to_cpu(event->transfer_len))); | |
22405ed2 AX |
1850 | /* Fast path - was this the last TRB in the TD for this URB? */ |
1851 | if (event_trb == td->last_trb) { | |
28ccd296 | 1852 | if (TRB_LEN(le32_to_cpu(event->transfer_len)) != 0) { |
22405ed2 AX |
1853 | td->urb->actual_length = |
1854 | td->urb->transfer_buffer_length - | |
28ccd296 | 1855 | TRB_LEN(le32_to_cpu(event->transfer_len)); |
22405ed2 AX |
1856 | if (td->urb->transfer_buffer_length < |
1857 | td->urb->actual_length) { | |
1858 | xhci_warn(xhci, "HC gave bad length " | |
1859 | "of %d bytes left\n", | |
28ccd296 | 1860 | TRB_LEN(le32_to_cpu(event->transfer_len))); |
22405ed2 AX |
1861 | td->urb->actual_length = 0; |
1862 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) | |
1863 | *status = -EREMOTEIO; | |
1864 | else | |
1865 | *status = 0; | |
1866 | } | |
1867 | /* Don't overwrite a previously set error code */ | |
1868 | if (*status == -EINPROGRESS) { | |
1869 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) | |
1870 | *status = -EREMOTEIO; | |
1871 | else | |
1872 | *status = 0; | |
1873 | } | |
1874 | } else { | |
1875 | td->urb->actual_length = | |
1876 | td->urb->transfer_buffer_length; | |
1877 | /* Ignore a short packet completion if the | |
1878 | * untransferred length was zero. | |
1879 | */ | |
1880 | if (*status == -EREMOTEIO) | |
1881 | *status = 0; | |
1882 | } | |
1883 | } else { | |
1884 | /* Slow path - walk the list, starting from the dequeue | |
1885 | * pointer, to get the actual length transferred. | |
1886 | */ | |
1887 | td->urb->actual_length = 0; | |
1888 | for (cur_trb = ep_ring->dequeue, cur_seg = ep_ring->deq_seg; | |
1889 | cur_trb != event_trb; | |
1890 | next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) { | |
28ccd296 | 1891 | if ((le32_to_cpu(cur_trb->generic.field[3]) & |
22405ed2 | 1892 | TRB_TYPE_BITMASK) != TRB_TYPE(TRB_TR_NOOP) && |
28ccd296 | 1893 | (le32_to_cpu(cur_trb->generic.field[3]) & |
22405ed2 AX |
1894 | TRB_TYPE_BITMASK) != TRB_TYPE(TRB_LINK)) |
1895 | td->urb->actual_length += | |
28ccd296 | 1896 | TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])); |
22405ed2 AX |
1897 | } |
1898 | /* If the ring didn't stop on a Link or No-op TRB, add | |
1899 | * in the actual bytes transferred from the Normal TRB | |
1900 | */ | |
1901 | if (trb_comp_code != COMP_STOP_INVAL) | |
1902 | td->urb->actual_length += | |
28ccd296 ME |
1903 | TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])) - |
1904 | TRB_LEN(le32_to_cpu(event->transfer_len)); | |
22405ed2 AX |
1905 | } |
1906 | ||
1907 | return finish_td(xhci, td, event_trb, event, ep, status, false); | |
1908 | } | |
1909 | ||
d0e96f5a SS |
1910 | /* |
1911 | * If this function returns an error condition, it means it got a Transfer | |
1912 | * event with a corrupted Slot ID, Endpoint ID, or TRB DMA address. | |
1913 | * At this point, the host controller is probably hosed and should be reset. | |
1914 | */ | |
1915 | static int handle_tx_event(struct xhci_hcd *xhci, | |
1916 | struct xhci_transfer_event *event) | |
1917 | { | |
1918 | struct xhci_virt_device *xdev; | |
63a0d9ab | 1919 | struct xhci_virt_ep *ep; |
d0e96f5a | 1920 | struct xhci_ring *ep_ring; |
82d1009f | 1921 | unsigned int slot_id; |
d0e96f5a | 1922 | int ep_index; |
326b4810 | 1923 | struct xhci_td *td = NULL; |
d0e96f5a SS |
1924 | dma_addr_t event_dma; |
1925 | struct xhci_segment *event_seg; | |
1926 | union xhci_trb *event_trb; | |
326b4810 | 1927 | struct urb *urb = NULL; |
d0e96f5a | 1928 | int status = -EINPROGRESS; |
8e51adcc | 1929 | struct urb_priv *urb_priv; |
d115b048 | 1930 | struct xhci_ep_ctx *ep_ctx; |
66d1eebc | 1931 | u32 trb_comp_code; |
4422da61 | 1932 | int ret = 0; |
d0e96f5a | 1933 | |
28ccd296 | 1934 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
82d1009f | 1935 | xdev = xhci->devs[slot_id]; |
d0e96f5a SS |
1936 | if (!xdev) { |
1937 | xhci_err(xhci, "ERROR Transfer event pointed to bad slot\n"); | |
1938 | return -ENODEV; | |
1939 | } | |
1940 | ||
1941 | /* Endpoint ID is 1 based, our index is zero based */ | |
28ccd296 | 1942 | ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1; |
63a0d9ab | 1943 | ep = &xdev->eps[ep_index]; |
28ccd296 | 1944 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
d115b048 | 1945 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
986a92d4 | 1946 | if (!ep_ring || |
28ccd296 ME |
1947 | (le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK) == |
1948 | EP_STATE_DISABLED) { | |
e9df17eb SS |
1949 | xhci_err(xhci, "ERROR Transfer event for disabled endpoint " |
1950 | "or incorrect stream ring\n"); | |
d0e96f5a SS |
1951 | return -ENODEV; |
1952 | } | |
1953 | ||
28ccd296 ME |
1954 | event_dma = le64_to_cpu(event->buffer); |
1955 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); | |
986a92d4 | 1956 | /* Look for common error cases */ |
66d1eebc | 1957 | switch (trb_comp_code) { |
b10de142 SS |
1958 | /* Skip codes that require special handling depending on |
1959 | * transfer type | |
1960 | */ | |
1961 | case COMP_SUCCESS: | |
1962 | case COMP_SHORT_TX: | |
1963 | break; | |
ae636747 SS |
1964 | case COMP_STOP: |
1965 | xhci_dbg(xhci, "Stopped on Transfer TRB\n"); | |
1966 | break; | |
1967 | case COMP_STOP_INVAL: | |
1968 | xhci_dbg(xhci, "Stopped on No-op or Link TRB\n"); | |
1969 | break; | |
b10de142 SS |
1970 | case COMP_STALL: |
1971 | xhci_warn(xhci, "WARN: Stalled endpoint\n"); | |
63a0d9ab | 1972 | ep->ep_state |= EP_HALTED; |
b10de142 SS |
1973 | status = -EPIPE; |
1974 | break; | |
1975 | case COMP_TRB_ERR: | |
1976 | xhci_warn(xhci, "WARN: TRB error on endpoint\n"); | |
1977 | status = -EILSEQ; | |
1978 | break; | |
ec74e403 | 1979 | case COMP_SPLIT_ERR: |
b10de142 SS |
1980 | case COMP_TX_ERR: |
1981 | xhci_warn(xhci, "WARN: transfer error on endpoint\n"); | |
1982 | status = -EPROTO; | |
1983 | break; | |
4a73143c SS |
1984 | case COMP_BABBLE: |
1985 | xhci_warn(xhci, "WARN: babble error on endpoint\n"); | |
1986 | status = -EOVERFLOW; | |
1987 | break; | |
b10de142 SS |
1988 | case COMP_DB_ERR: |
1989 | xhci_warn(xhci, "WARN: HC couldn't access mem fast enough\n"); | |
1990 | status = -ENOSR; | |
1991 | break; | |
986a92d4 AX |
1992 | case COMP_BW_OVER: |
1993 | xhci_warn(xhci, "WARN: bandwidth overrun event on endpoint\n"); | |
1994 | break; | |
1995 | case COMP_BUFF_OVER: | |
1996 | xhci_warn(xhci, "WARN: buffer overrun event on endpoint\n"); | |
1997 | break; | |
1998 | case COMP_UNDERRUN: | |
1999 | /* | |
2000 | * When the Isoch ring is empty, the xHC will generate | |
2001 | * a Ring Overrun Event for IN Isoch endpoint or Ring | |
2002 | * Underrun Event for OUT Isoch endpoint. | |
2003 | */ | |
2004 | xhci_dbg(xhci, "underrun event on endpoint\n"); | |
2005 | if (!list_empty(&ep_ring->td_list)) | |
2006 | xhci_dbg(xhci, "Underrun Event for slot %d ep %d " | |
2007 | "still with TDs queued?\n", | |
28ccd296 ME |
2008 | TRB_TO_SLOT_ID(le32_to_cpu(event->flags)), |
2009 | ep_index); | |
986a92d4 AX |
2010 | goto cleanup; |
2011 | case COMP_OVERRUN: | |
2012 | xhci_dbg(xhci, "overrun event on endpoint\n"); | |
2013 | if (!list_empty(&ep_ring->td_list)) | |
2014 | xhci_dbg(xhci, "Overrun Event for slot %d ep %d " | |
2015 | "still with TDs queued?\n", | |
28ccd296 ME |
2016 | TRB_TO_SLOT_ID(le32_to_cpu(event->flags)), |
2017 | ep_index); | |
986a92d4 | 2018 | goto cleanup; |
d18240db AX |
2019 | case COMP_MISSED_INT: |
2020 | /* | |
2021 | * When encounter missed service error, one or more isoc tds | |
2022 | * may be missed by xHC. | |
2023 | * Set skip flag of the ep_ring; Complete the missed tds as | |
2024 | * short transfer when process the ep_ring next time. | |
2025 | */ | |
2026 | ep->skip = true; | |
2027 | xhci_dbg(xhci, "Miss service interval error, set skip flag\n"); | |
2028 | goto cleanup; | |
b10de142 | 2029 | default: |
b45b5069 | 2030 | if (xhci_is_vendor_info_code(xhci, trb_comp_code)) { |
5ad6a529 SS |
2031 | status = 0; |
2032 | break; | |
2033 | } | |
986a92d4 AX |
2034 | xhci_warn(xhci, "ERROR Unknown event condition, HC probably " |
2035 | "busted\n"); | |
2036 | goto cleanup; | |
2037 | } | |
2038 | ||
d18240db AX |
2039 | do { |
2040 | /* This TRB should be in the TD at the head of this ring's | |
2041 | * TD list. | |
2042 | */ | |
2043 | if (list_empty(&ep_ring->td_list)) { | |
2044 | xhci_warn(xhci, "WARN Event TRB for slot %d ep %d " | |
2045 | "with no TDs queued?\n", | |
28ccd296 ME |
2046 | TRB_TO_SLOT_ID(le32_to_cpu(event->flags)), |
2047 | ep_index); | |
d18240db | 2048 | xhci_dbg(xhci, "Event TRB with TRB type ID %u\n", |
28ccd296 ME |
2049 | (unsigned int) (le32_to_cpu(event->flags) |
2050 | & TRB_TYPE_BITMASK)>>10); | |
d18240db AX |
2051 | xhci_print_trb_offsets(xhci, (union xhci_trb *) event); |
2052 | if (ep->skip) { | |
2053 | ep->skip = false; | |
2054 | xhci_dbg(xhci, "td_list is empty while skip " | |
2055 | "flag set. Clear skip flag.\n"); | |
2056 | } | |
2057 | ret = 0; | |
2058 | goto cleanup; | |
2059 | } | |
986a92d4 | 2060 | |
d18240db | 2061 | td = list_entry(ep_ring->td_list.next, struct xhci_td, td_list); |
926008c9 | 2062 | |
d18240db AX |
2063 | /* Is this a TRB in the currently executing TD? */ |
2064 | event_seg = trb_in_td(ep_ring->deq_seg, ep_ring->dequeue, | |
2065 | td->last_trb, event_dma); | |
926008c9 DT |
2066 | if (!event_seg) { |
2067 | if (!ep->skip || | |
2068 | !usb_endpoint_xfer_isoc(&td->urb->ep->desc)) { | |
ad808333 SS |
2069 | /* Some host controllers give a spurious |
2070 | * successful event after a short transfer. | |
2071 | * Ignore it. | |
2072 | */ | |
2073 | if ((xhci->quirks & XHCI_SPURIOUS_SUCCESS) && | |
2074 | ep_ring->last_td_was_short) { | |
2075 | ep_ring->last_td_was_short = false; | |
2076 | ret = 0; | |
2077 | goto cleanup; | |
2078 | } | |
926008c9 DT |
2079 | /* HC is busted, give up! */ |
2080 | xhci_err(xhci, | |
2081 | "ERROR Transfer event TRB DMA ptr not " | |
2082 | "part of current TD\n"); | |
2083 | return -ESHUTDOWN; | |
2084 | } | |
2085 | ||
2086 | ret = skip_isoc_td(xhci, td, event, ep, &status); | |
2087 | goto cleanup; | |
2088 | } | |
ad808333 SS |
2089 | if (trb_comp_code == COMP_SHORT_TX) |
2090 | ep_ring->last_td_was_short = true; | |
2091 | else | |
2092 | ep_ring->last_td_was_short = false; | |
926008c9 DT |
2093 | |
2094 | if (ep->skip) { | |
d18240db AX |
2095 | xhci_dbg(xhci, "Found td. Clear skip flag.\n"); |
2096 | ep->skip = false; | |
2097 | } | |
678539cf | 2098 | |
926008c9 DT |
2099 | event_trb = &event_seg->trbs[(event_dma - event_seg->dma) / |
2100 | sizeof(*event_trb)]; | |
2101 | /* | |
2102 | * No-op TRB should not trigger interrupts. | |
2103 | * If event_trb is a no-op TRB, it means the | |
2104 | * corresponding TD has been cancelled. Just ignore | |
2105 | * the TD. | |
2106 | */ | |
28ccd296 ME |
2107 | if ((le32_to_cpu(event_trb->generic.field[3]) |
2108 | & TRB_TYPE_BITMASK) | |
926008c9 DT |
2109 | == TRB_TYPE(TRB_TR_NOOP)) { |
2110 | xhci_dbg(xhci, | |
2111 | "event_trb is a no-op TRB. Skip it\n"); | |
2112 | goto cleanup; | |
d18240db | 2113 | } |
4422da61 | 2114 | |
d18240db AX |
2115 | /* Now update the urb's actual_length and give back to |
2116 | * the core | |
82d1009f | 2117 | */ |
d18240db AX |
2118 | if (usb_endpoint_xfer_control(&td->urb->ep->desc)) |
2119 | ret = process_ctrl_td(xhci, td, event_trb, event, ep, | |
2120 | &status); | |
04e51901 AX |
2121 | else if (usb_endpoint_xfer_isoc(&td->urb->ep->desc)) |
2122 | ret = process_isoc_td(xhci, td, event_trb, event, ep, | |
2123 | &status); | |
d18240db AX |
2124 | else |
2125 | ret = process_bulk_intr_td(xhci, td, event_trb, event, | |
2126 | ep, &status); | |
2127 | ||
2128 | cleanup: | |
2129 | /* | |
2130 | * Do not update event ring dequeue pointer if ep->skip is set. | |
2131 | * Will roll back to continue process missed tds. | |
2132 | */ | |
2133 | if (trb_comp_code == COMP_MISSED_INT || !ep->skip) { | |
2134 | inc_deq(xhci, xhci->event_ring, true); | |
d18240db AX |
2135 | } |
2136 | ||
2137 | if (ret) { | |
2138 | urb = td->urb; | |
8e51adcc | 2139 | urb_priv = urb->hcpriv; |
d18240db AX |
2140 | /* Leave the TD around for the reset endpoint function |
2141 | * to use(but only if it's not a control endpoint, | |
2142 | * since we already queued the Set TR dequeue pointer | |
2143 | * command for stalled control endpoints). | |
2144 | */ | |
2145 | if (usb_endpoint_xfer_control(&urb->ep->desc) || | |
2146 | (trb_comp_code != COMP_STALL && | |
2147 | trb_comp_code != COMP_BABBLE)) | |
8e51adcc | 2148 | xhci_urb_free_priv(xhci, urb_priv); |
d18240db | 2149 | |
214f76f7 | 2150 | usb_hcd_unlink_urb_from_ep(bus_to_hcd(urb->dev->bus), urb); |
f444ff27 SS |
2151 | if ((urb->actual_length != urb->transfer_buffer_length && |
2152 | (urb->transfer_flags & | |
2153 | URB_SHORT_NOT_OK)) || | |
2154 | status != 0) | |
2155 | xhci_dbg(xhci, "Giveback URB %p, len = %d, " | |
2156 | "expected = %x, status = %d\n", | |
2157 | urb, urb->actual_length, | |
2158 | urb->transfer_buffer_length, | |
2159 | status); | |
d18240db | 2160 | spin_unlock(&xhci->lock); |
214f76f7 | 2161 | usb_hcd_giveback_urb(bus_to_hcd(urb->dev->bus), urb, status); |
d18240db AX |
2162 | spin_lock(&xhci->lock); |
2163 | } | |
2164 | ||
2165 | /* | |
2166 | * If ep->skip is set, it means there are missed tds on the | |
2167 | * endpoint ring need to take care of. | |
2168 | * Process them as short transfer until reach the td pointed by | |
2169 | * the event. | |
2170 | */ | |
2171 | } while (ep->skip && trb_comp_code != COMP_MISSED_INT); | |
2172 | ||
d0e96f5a SS |
2173 | return 0; |
2174 | } | |
2175 | ||
0f2a7930 SS |
2176 | /* |
2177 | * This function handles all OS-owned events on the event ring. It may drop | |
2178 | * xhci->lock between event processing (e.g. to pass up port status changes). | |
9dee9a21 ME |
2179 | * Returns >0 for "possibly more events to process" (caller should call again), |
2180 | * otherwise 0 if done. In future, <0 returns should indicate error code. | |
0f2a7930 | 2181 | */ |
9dee9a21 | 2182 | static int xhci_handle_event(struct xhci_hcd *xhci) |
7f84eef0 SS |
2183 | { |
2184 | union xhci_trb *event; | |
0f2a7930 | 2185 | int update_ptrs = 1; |
d0e96f5a | 2186 | int ret; |
7f84eef0 SS |
2187 | |
2188 | if (!xhci->event_ring || !xhci->event_ring->dequeue) { | |
2189 | xhci->error_bitmask |= 1 << 1; | |
9dee9a21 | 2190 | return 0; |
7f84eef0 SS |
2191 | } |
2192 | ||
2193 | event = xhci->event_ring->dequeue; | |
2194 | /* Does the HC or OS own the TRB? */ | |
28ccd296 ME |
2195 | if ((le32_to_cpu(event->event_cmd.flags) & TRB_CYCLE) != |
2196 | xhci->event_ring->cycle_state) { | |
7f84eef0 | 2197 | xhci->error_bitmask |= 1 << 2; |
9dee9a21 | 2198 | return 0; |
7f84eef0 SS |
2199 | } |
2200 | ||
92a3da41 ME |
2201 | /* |
2202 | * Barrier between reading the TRB_CYCLE (valid) flag above and any | |
2203 | * speculative reads of the event's flags/data below. | |
2204 | */ | |
2205 | rmb(); | |
0f2a7930 | 2206 | /* FIXME: Handle more event types. */ |
28ccd296 | 2207 | switch ((le32_to_cpu(event->event_cmd.flags) & TRB_TYPE_BITMASK)) { |
7f84eef0 SS |
2208 | case TRB_TYPE(TRB_COMPLETION): |
2209 | handle_cmd_completion(xhci, &event->event_cmd); | |
2210 | break; | |
0f2a7930 SS |
2211 | case TRB_TYPE(TRB_PORT_STATUS): |
2212 | handle_port_status(xhci, event); | |
2213 | update_ptrs = 0; | |
2214 | break; | |
d0e96f5a SS |
2215 | case TRB_TYPE(TRB_TRANSFER): |
2216 | ret = handle_tx_event(xhci, &event->trans_event); | |
2217 | if (ret < 0) | |
2218 | xhci->error_bitmask |= 1 << 9; | |
2219 | else | |
2220 | update_ptrs = 0; | |
2221 | break; | |
7f84eef0 | 2222 | default: |
28ccd296 ME |
2223 | if ((le32_to_cpu(event->event_cmd.flags) & TRB_TYPE_BITMASK) >= |
2224 | TRB_TYPE(48)) | |
0238634d SS |
2225 | handle_vendor_event(xhci, event); |
2226 | else | |
2227 | xhci->error_bitmask |= 1 << 3; | |
7f84eef0 | 2228 | } |
6f5165cf SS |
2229 | /* Any of the above functions may drop and re-acquire the lock, so check |
2230 | * to make sure a watchdog timer didn't mark the host as non-responsive. | |
2231 | */ | |
2232 | if (xhci->xhc_state & XHCI_STATE_DYING) { | |
2233 | xhci_dbg(xhci, "xHCI host dying, returning from " | |
2234 | "event handler.\n"); | |
9dee9a21 | 2235 | return 0; |
6f5165cf | 2236 | } |
7f84eef0 | 2237 | |
c06d68b8 SS |
2238 | if (update_ptrs) |
2239 | /* Update SW event ring dequeue pointer */ | |
0f2a7930 | 2240 | inc_deq(xhci, xhci->event_ring, true); |
c06d68b8 | 2241 | |
9dee9a21 ME |
2242 | /* Are there more items on the event ring? Caller will call us again to |
2243 | * check. | |
2244 | */ | |
2245 | return 1; | |
7f84eef0 | 2246 | } |
9032cd52 SS |
2247 | |
2248 | /* | |
2249 | * xHCI spec says we can get an interrupt, and if the HC has an error condition, | |
2250 | * we might get bad data out of the event ring. Section 4.10.2.7 has a list of | |
2251 | * indicators of an event TRB error, but we check the status *first* to be safe. | |
2252 | */ | |
2253 | irqreturn_t xhci_irq(struct usb_hcd *hcd) | |
2254 | { | |
2255 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
c21599a3 | 2256 | u32 status; |
9032cd52 | 2257 | union xhci_trb *trb; |
bda53145 | 2258 | u64 temp_64; |
c06d68b8 SS |
2259 | union xhci_trb *event_ring_deq; |
2260 | dma_addr_t deq; | |
9032cd52 SS |
2261 | |
2262 | spin_lock(&xhci->lock); | |
2263 | trb = xhci->event_ring->dequeue; | |
2264 | /* Check if the xHC generated the interrupt, or the irq is shared */ | |
27e0dd4d | 2265 | status = xhci_readl(xhci, &xhci->op_regs->status); |
c21599a3 | 2266 | if (status == 0xffffffff) |
9032cd52 SS |
2267 | goto hw_died; |
2268 | ||
c21599a3 | 2269 | if (!(status & STS_EINT)) { |
9032cd52 | 2270 | spin_unlock(&xhci->lock); |
9032cd52 SS |
2271 | return IRQ_NONE; |
2272 | } | |
27e0dd4d | 2273 | if (status & STS_FATAL) { |
9032cd52 SS |
2274 | xhci_warn(xhci, "WARNING: Host System Error\n"); |
2275 | xhci_halt(xhci); | |
2276 | hw_died: | |
9032cd52 SS |
2277 | spin_unlock(&xhci->lock); |
2278 | return -ESHUTDOWN; | |
2279 | } | |
2280 | ||
bda53145 SS |
2281 | /* |
2282 | * Clear the op reg interrupt status first, | |
2283 | * so we can receive interrupts from other MSI-X interrupters. | |
2284 | * Write 1 to clear the interrupt status. | |
2285 | */ | |
27e0dd4d SS |
2286 | status |= STS_EINT; |
2287 | xhci_writel(xhci, status, &xhci->op_regs->status); | |
bda53145 SS |
2288 | /* FIXME when MSI-X is supported and there are multiple vectors */ |
2289 | /* Clear the MSI-X event interrupt status */ | |
2290 | ||
c21599a3 SS |
2291 | if (hcd->irq != -1) { |
2292 | u32 irq_pending; | |
2293 | /* Acknowledge the PCI interrupt */ | |
2294 | irq_pending = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
2295 | irq_pending |= 0x3; | |
2296 | xhci_writel(xhci, irq_pending, &xhci->ir_set->irq_pending); | |
2297 | } | |
bda53145 | 2298 | |
c06d68b8 | 2299 | if (xhci->xhc_state & XHCI_STATE_DYING) { |
bda53145 SS |
2300 | xhci_dbg(xhci, "xHCI dying, ignoring interrupt. " |
2301 | "Shouldn't IRQs be disabled?\n"); | |
c06d68b8 SS |
2302 | /* Clear the event handler busy flag (RW1C); |
2303 | * the event ring should be empty. | |
bda53145 | 2304 | */ |
c06d68b8 SS |
2305 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
2306 | xhci_write_64(xhci, temp_64 | ERST_EHB, | |
2307 | &xhci->ir_set->erst_dequeue); | |
2308 | spin_unlock(&xhci->lock); | |
2309 | ||
2310 | return IRQ_HANDLED; | |
2311 | } | |
2312 | ||
2313 | event_ring_deq = xhci->event_ring->dequeue; | |
2314 | /* FIXME this should be a delayed service routine | |
2315 | * that clears the EHB. | |
2316 | */ | |
9dee9a21 | 2317 | while (xhci_handle_event(xhci) > 0) {} |
bda53145 | 2318 | |
bda53145 | 2319 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
c06d68b8 SS |
2320 | /* If necessary, update the HW's version of the event ring deq ptr. */ |
2321 | if (event_ring_deq != xhci->event_ring->dequeue) { | |
2322 | deq = xhci_trb_virt_to_dma(xhci->event_ring->deq_seg, | |
2323 | xhci->event_ring->dequeue); | |
2324 | if (deq == 0) | |
2325 | xhci_warn(xhci, "WARN something wrong with SW event " | |
2326 | "ring dequeue ptr.\n"); | |
2327 | /* Update HC event ring dequeue pointer */ | |
2328 | temp_64 &= ERST_PTR_MASK; | |
2329 | temp_64 |= ((u64) deq & (u64) ~ERST_PTR_MASK); | |
2330 | } | |
2331 | ||
2332 | /* Clear the event handler busy flag (RW1C); event ring is empty. */ | |
2333 | temp_64 |= ERST_EHB; | |
2334 | xhci_write_64(xhci, temp_64, &xhci->ir_set->erst_dequeue); | |
2335 | ||
9032cd52 SS |
2336 | spin_unlock(&xhci->lock); |
2337 | ||
2338 | return IRQ_HANDLED; | |
2339 | } | |
2340 | ||
2341 | irqreturn_t xhci_msi_irq(int irq, struct usb_hcd *hcd) | |
2342 | { | |
2343 | irqreturn_t ret; | |
b3209379 | 2344 | struct xhci_hcd *xhci; |
9032cd52 | 2345 | |
b3209379 | 2346 | xhci = hcd_to_xhci(hcd); |
9032cd52 | 2347 | set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); |
b3209379 SS |
2348 | if (xhci->shared_hcd) |
2349 | set_bit(HCD_FLAG_SAW_IRQ, &xhci->shared_hcd->flags); | |
9032cd52 SS |
2350 | |
2351 | ret = xhci_irq(hcd); | |
2352 | ||
2353 | return ret; | |
2354 | } | |
7f84eef0 | 2355 | |
d0e96f5a SS |
2356 | /**** Endpoint Ring Operations ****/ |
2357 | ||
7f84eef0 SS |
2358 | /* |
2359 | * Generic function for queueing a TRB on a ring. | |
2360 | * The caller must have checked to make sure there's room on the ring. | |
6cc30d85 SS |
2361 | * |
2362 | * @more_trbs_coming: Will you enqueue more TRBs before calling | |
2363 | * prepare_transfer()? | |
7f84eef0 SS |
2364 | */ |
2365 | static void queue_trb(struct xhci_hcd *xhci, struct xhci_ring *ring, | |
6cc30d85 | 2366 | bool consumer, bool more_trbs_coming, |
7f84eef0 SS |
2367 | u32 field1, u32 field2, u32 field3, u32 field4) |
2368 | { | |
2369 | struct xhci_generic_trb *trb; | |
2370 | ||
2371 | trb = &ring->enqueue->generic; | |
28ccd296 ME |
2372 | trb->field[0] = cpu_to_le32(field1); |
2373 | trb->field[1] = cpu_to_le32(field2); | |
2374 | trb->field[2] = cpu_to_le32(field3); | |
2375 | trb->field[3] = cpu_to_le32(field4); | |
6cc30d85 | 2376 | inc_enq(xhci, ring, consumer, more_trbs_coming); |
7f84eef0 SS |
2377 | } |
2378 | ||
d0e96f5a SS |
2379 | /* |
2380 | * Does various checks on the endpoint ring, and makes it ready to queue num_trbs. | |
2381 | * FIXME allocate segments if the ring is full. | |
2382 | */ | |
2383 | static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring, | |
2384 | u32 ep_state, unsigned int num_trbs, gfp_t mem_flags) | |
2385 | { | |
2386 | /* Make sure the endpoint has been added to xHC schedule */ | |
d0e96f5a SS |
2387 | switch (ep_state) { |
2388 | case EP_STATE_DISABLED: | |
2389 | /* | |
2390 | * USB core changed config/interfaces without notifying us, | |
2391 | * or hardware is reporting the wrong state. | |
2392 | */ | |
2393 | xhci_warn(xhci, "WARN urb submitted to disabled ep\n"); | |
2394 | return -ENOENT; | |
d0e96f5a | 2395 | case EP_STATE_ERROR: |
c92bcfa7 | 2396 | xhci_warn(xhci, "WARN waiting for error on ep to be cleared\n"); |
d0e96f5a SS |
2397 | /* FIXME event handling code for error needs to clear it */ |
2398 | /* XXX not sure if this should be -ENOENT or not */ | |
2399 | return -EINVAL; | |
c92bcfa7 SS |
2400 | case EP_STATE_HALTED: |
2401 | xhci_dbg(xhci, "WARN halted endpoint, queueing URB anyway.\n"); | |
d0e96f5a SS |
2402 | case EP_STATE_STOPPED: |
2403 | case EP_STATE_RUNNING: | |
2404 | break; | |
2405 | default: | |
2406 | xhci_err(xhci, "ERROR unknown endpoint state for ep\n"); | |
2407 | /* | |
2408 | * FIXME issue Configure Endpoint command to try to get the HC | |
2409 | * back into a known state. | |
2410 | */ | |
2411 | return -EINVAL; | |
2412 | } | |
2413 | if (!room_on_ring(xhci, ep_ring, num_trbs)) { | |
2414 | /* FIXME allocate more room */ | |
2415 | xhci_err(xhci, "ERROR no room on ep ring\n"); | |
2416 | return -ENOMEM; | |
2417 | } | |
6c12db90 JY |
2418 | |
2419 | if (enqueue_is_link_trb(ep_ring)) { | |
2420 | struct xhci_ring *ring = ep_ring; | |
2421 | union xhci_trb *next; | |
6c12db90 | 2422 | |
6c12db90 JY |
2423 | next = ring->enqueue; |
2424 | ||
2425 | while (last_trb(xhci, ring, ring->enq_seg, next)) { | |
6c12db90 JY |
2426 | /* If we're not dealing with 0.95 hardware, |
2427 | * clear the chain bit. | |
2428 | */ | |
2429 | if (!xhci_link_trb_quirk(xhci)) | |
28ccd296 | 2430 | next->link.control &= cpu_to_le32(~TRB_CHAIN); |
6c12db90 | 2431 | else |
28ccd296 | 2432 | next->link.control |= cpu_to_le32(TRB_CHAIN); |
6c12db90 JY |
2433 | |
2434 | wmb(); | |
28ccd296 | 2435 | next->link.control ^= cpu_to_le32((u32) TRB_CYCLE); |
6c12db90 JY |
2436 | |
2437 | /* Toggle the cycle bit after the last ring segment. */ | |
2438 | if (last_trb_on_last_seg(xhci, ring, ring->enq_seg, next)) { | |
2439 | ring->cycle_state = (ring->cycle_state ? 0 : 1); | |
2440 | if (!in_interrupt()) { | |
2441 | xhci_dbg(xhci, "queue_trb: Toggle cycle " | |
2442 | "state for ring %p = %i\n", | |
2443 | ring, (unsigned int)ring->cycle_state); | |
2444 | } | |
2445 | } | |
2446 | ring->enq_seg = ring->enq_seg->next; | |
2447 | ring->enqueue = ring->enq_seg->trbs; | |
2448 | next = ring->enqueue; | |
2449 | } | |
2450 | } | |
2451 | ||
d0e96f5a SS |
2452 | return 0; |
2453 | } | |
2454 | ||
23e3be11 | 2455 | static int prepare_transfer(struct xhci_hcd *xhci, |
d0e96f5a SS |
2456 | struct xhci_virt_device *xdev, |
2457 | unsigned int ep_index, | |
e9df17eb | 2458 | unsigned int stream_id, |
d0e96f5a SS |
2459 | unsigned int num_trbs, |
2460 | struct urb *urb, | |
8e51adcc | 2461 | unsigned int td_index, |
d0e96f5a SS |
2462 | gfp_t mem_flags) |
2463 | { | |
2464 | int ret; | |
8e51adcc AX |
2465 | struct urb_priv *urb_priv; |
2466 | struct xhci_td *td; | |
e9df17eb | 2467 | struct xhci_ring *ep_ring; |
d115b048 | 2468 | struct xhci_ep_ctx *ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
e9df17eb SS |
2469 | |
2470 | ep_ring = xhci_stream_id_to_ring(xdev, ep_index, stream_id); | |
2471 | if (!ep_ring) { | |
2472 | xhci_dbg(xhci, "Can't prepare ring for bad stream ID %u\n", | |
2473 | stream_id); | |
2474 | return -EINVAL; | |
2475 | } | |
2476 | ||
2477 | ret = prepare_ring(xhci, ep_ring, | |
28ccd296 ME |
2478 | le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK, |
2479 | num_trbs, mem_flags); | |
d0e96f5a SS |
2480 | if (ret) |
2481 | return ret; | |
d0e96f5a | 2482 | |
8e51adcc AX |
2483 | urb_priv = urb->hcpriv; |
2484 | td = urb_priv->td[td_index]; | |
2485 | ||
2486 | INIT_LIST_HEAD(&td->td_list); | |
2487 | INIT_LIST_HEAD(&td->cancelled_td_list); | |
2488 | ||
2489 | if (td_index == 0) { | |
214f76f7 | 2490 | ret = usb_hcd_link_urb_to_ep(bus_to_hcd(urb->dev->bus), urb); |
8e51adcc AX |
2491 | if (unlikely(ret)) { |
2492 | xhci_urb_free_priv(xhci, urb_priv); | |
2493 | urb->hcpriv = NULL; | |
2494 | return ret; | |
2495 | } | |
d0e96f5a SS |
2496 | } |
2497 | ||
8e51adcc | 2498 | td->urb = urb; |
d0e96f5a | 2499 | /* Add this TD to the tail of the endpoint ring's TD list */ |
8e51adcc AX |
2500 | list_add_tail(&td->td_list, &ep_ring->td_list); |
2501 | td->start_seg = ep_ring->enq_seg; | |
2502 | td->first_trb = ep_ring->enqueue; | |
2503 | ||
2504 | urb_priv->td[td_index] = td; | |
d0e96f5a SS |
2505 | |
2506 | return 0; | |
2507 | } | |
2508 | ||
23e3be11 | 2509 | static unsigned int count_sg_trbs_needed(struct xhci_hcd *xhci, struct urb *urb) |
8a96c052 SS |
2510 | { |
2511 | int num_sgs, num_trbs, running_total, temp, i; | |
2512 | struct scatterlist *sg; | |
2513 | ||
2514 | sg = NULL; | |
2515 | num_sgs = urb->num_sgs; | |
2516 | temp = urb->transfer_buffer_length; | |
2517 | ||
2518 | xhci_dbg(xhci, "count sg list trbs: \n"); | |
2519 | num_trbs = 0; | |
910f8d0c | 2520 | for_each_sg(urb->sg, sg, num_sgs, i) { |
8a96c052 SS |
2521 | unsigned int previous_total_trbs = num_trbs; |
2522 | unsigned int len = sg_dma_len(sg); | |
2523 | ||
2524 | /* Scatter gather list entries may cross 64KB boundaries */ | |
2525 | running_total = TRB_MAX_BUFF_SIZE - | |
a2490187 | 2526 | (sg_dma_address(sg) & (TRB_MAX_BUFF_SIZE - 1)); |
5807795b | 2527 | running_total &= TRB_MAX_BUFF_SIZE - 1; |
8a96c052 SS |
2528 | if (running_total != 0) |
2529 | num_trbs++; | |
2530 | ||
2531 | /* How many more 64KB chunks to transfer, how many more TRBs? */ | |
bcd2fde0 | 2532 | while (running_total < sg_dma_len(sg) && running_total < temp) { |
8a96c052 SS |
2533 | num_trbs++; |
2534 | running_total += TRB_MAX_BUFF_SIZE; | |
2535 | } | |
700e2052 GKH |
2536 | xhci_dbg(xhci, " sg #%d: dma = %#llx, len = %#x (%d), num_trbs = %d\n", |
2537 | i, (unsigned long long)sg_dma_address(sg), | |
2538 | len, len, num_trbs - previous_total_trbs); | |
8a96c052 SS |
2539 | |
2540 | len = min_t(int, len, temp); | |
2541 | temp -= len; | |
2542 | if (temp == 0) | |
2543 | break; | |
2544 | } | |
2545 | xhci_dbg(xhci, "\n"); | |
2546 | if (!in_interrupt()) | |
f2c565e2 AX |
2547 | xhci_dbg(xhci, "ep %#x - urb len = %d, sglist used, " |
2548 | "num_trbs = %d\n", | |
8a96c052 SS |
2549 | urb->ep->desc.bEndpointAddress, |
2550 | urb->transfer_buffer_length, | |
2551 | num_trbs); | |
2552 | return num_trbs; | |
2553 | } | |
2554 | ||
23e3be11 | 2555 | static void check_trb_math(struct urb *urb, int num_trbs, int running_total) |
8a96c052 SS |
2556 | { |
2557 | if (num_trbs != 0) | |
a2490187 | 2558 | dev_err(&urb->dev->dev, "%s - ep %#x - Miscalculated number of " |
8a96c052 SS |
2559 | "TRBs, %d left\n", __func__, |
2560 | urb->ep->desc.bEndpointAddress, num_trbs); | |
2561 | if (running_total != urb->transfer_buffer_length) | |
a2490187 | 2562 | dev_err(&urb->dev->dev, "%s - ep %#x - Miscalculated tx length, " |
8a96c052 SS |
2563 | "queued %#x (%d), asked for %#x (%d)\n", |
2564 | __func__, | |
2565 | urb->ep->desc.bEndpointAddress, | |
2566 | running_total, running_total, | |
2567 | urb->transfer_buffer_length, | |
2568 | urb->transfer_buffer_length); | |
2569 | } | |
2570 | ||
23e3be11 | 2571 | static void giveback_first_trb(struct xhci_hcd *xhci, int slot_id, |
e9df17eb | 2572 | unsigned int ep_index, unsigned int stream_id, int start_cycle, |
e1eab2e0 | 2573 | struct xhci_generic_trb *start_trb) |
8a96c052 | 2574 | { |
8a96c052 SS |
2575 | /* |
2576 | * Pass all the TRBs to the hardware at once and make sure this write | |
2577 | * isn't reordered. | |
2578 | */ | |
2579 | wmb(); | |
50f7b52a | 2580 | if (start_cycle) |
28ccd296 | 2581 | start_trb->field[3] |= cpu_to_le32(start_cycle); |
50f7b52a | 2582 | else |
28ccd296 | 2583 | start_trb->field[3] &= cpu_to_le32(~TRB_CYCLE); |
be88fe4f | 2584 | xhci_ring_ep_doorbell(xhci, slot_id, ep_index, stream_id); |
8a96c052 SS |
2585 | } |
2586 | ||
624defa1 SS |
2587 | /* |
2588 | * xHCI uses normal TRBs for both bulk and interrupt. When the interrupt | |
2589 | * endpoint is to be serviced, the xHC will consume (at most) one TD. A TD | |
2590 | * (comprised of sg list entries) can take several service intervals to | |
2591 | * transmit. | |
2592 | */ | |
2593 | int xhci_queue_intr_tx(struct xhci_hcd *xhci, gfp_t mem_flags, | |
2594 | struct urb *urb, int slot_id, unsigned int ep_index) | |
2595 | { | |
2596 | struct xhci_ep_ctx *ep_ctx = xhci_get_ep_ctx(xhci, | |
2597 | xhci->devs[slot_id]->out_ctx, ep_index); | |
2598 | int xhci_interval; | |
2599 | int ep_interval; | |
2600 | ||
28ccd296 | 2601 | xhci_interval = EP_INTERVAL_TO_UFRAMES(le32_to_cpu(ep_ctx->ep_info)); |
624defa1 SS |
2602 | ep_interval = urb->interval; |
2603 | /* Convert to microframes */ | |
2604 | if (urb->dev->speed == USB_SPEED_LOW || | |
2605 | urb->dev->speed == USB_SPEED_FULL) | |
2606 | ep_interval *= 8; | |
2607 | /* FIXME change this to a warning and a suggestion to use the new API | |
2608 | * to set the polling interval (once the API is added). | |
2609 | */ | |
2610 | if (xhci_interval != ep_interval) { | |
7961acd7 | 2611 | if (printk_ratelimit()) |
624defa1 SS |
2612 | dev_dbg(&urb->dev->dev, "Driver uses different interval" |
2613 | " (%d microframe%s) than xHCI " | |
2614 | "(%d microframe%s)\n", | |
2615 | ep_interval, | |
2616 | ep_interval == 1 ? "" : "s", | |
2617 | xhci_interval, | |
2618 | xhci_interval == 1 ? "" : "s"); | |
2619 | urb->interval = xhci_interval; | |
2620 | /* Convert back to frames for LS/FS devices */ | |
2621 | if (urb->dev->speed == USB_SPEED_LOW || | |
2622 | urb->dev->speed == USB_SPEED_FULL) | |
2623 | urb->interval /= 8; | |
2624 | } | |
2625 | return xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb, slot_id, ep_index); | |
2626 | } | |
2627 | ||
04dd950d SS |
2628 | /* |
2629 | * The TD size is the number of bytes remaining in the TD (including this TRB), | |
2630 | * right shifted by 10. | |
2631 | * It must fit in bits 21:17, so it can't be bigger than 31. | |
2632 | */ | |
2633 | static u32 xhci_td_remainder(unsigned int remainder) | |
2634 | { | |
2635 | u32 max = (1 << (21 - 17 + 1)) - 1; | |
2636 | ||
2637 | if ((remainder >> 10) >= max) | |
2638 | return max << 17; | |
2639 | else | |
2640 | return (remainder >> 10) << 17; | |
2641 | } | |
2642 | ||
4da6e6f2 SS |
2643 | /* |
2644 | * For xHCI 1.0 host controllers, TD size is the number of packets remaining in | |
2645 | * the TD (*not* including this TRB). | |
2646 | * | |
2647 | * Total TD packet count = total_packet_count = | |
2648 | * roundup(TD size in bytes / wMaxPacketSize) | |
2649 | * | |
2650 | * Packets transferred up to and including this TRB = packets_transferred = | |
2651 | * rounddown(total bytes transferred including this TRB / wMaxPacketSize) | |
2652 | * | |
2653 | * TD size = total_packet_count - packets_transferred | |
2654 | * | |
2655 | * It must fit in bits 21:17, so it can't be bigger than 31. | |
2656 | */ | |
2657 | ||
2658 | static u32 xhci_v1_0_td_remainder(int running_total, int trb_buff_len, | |
2659 | unsigned int total_packet_count, struct urb *urb) | |
2660 | { | |
2661 | int packets_transferred; | |
2662 | ||
2663 | /* All the TRB queueing functions don't count the current TRB in | |
2664 | * running_total. | |
2665 | */ | |
2666 | packets_transferred = (running_total + trb_buff_len) / | |
2667 | le16_to_cpu(urb->ep->desc.wMaxPacketSize); | |
2668 | ||
2669 | return xhci_td_remainder(total_packet_count - packets_transferred); | |
2670 | } | |
2671 | ||
23e3be11 | 2672 | static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags, |
8a96c052 SS |
2673 | struct urb *urb, int slot_id, unsigned int ep_index) |
2674 | { | |
2675 | struct xhci_ring *ep_ring; | |
2676 | unsigned int num_trbs; | |
8e51adcc | 2677 | struct urb_priv *urb_priv; |
8a96c052 SS |
2678 | struct xhci_td *td; |
2679 | struct scatterlist *sg; | |
2680 | int num_sgs; | |
2681 | int trb_buff_len, this_sg_len, running_total; | |
4da6e6f2 | 2682 | unsigned int total_packet_count; |
8a96c052 SS |
2683 | bool first_trb; |
2684 | u64 addr; | |
6cc30d85 | 2685 | bool more_trbs_coming; |
8a96c052 SS |
2686 | |
2687 | struct xhci_generic_trb *start_trb; | |
2688 | int start_cycle; | |
2689 | ||
e9df17eb SS |
2690 | ep_ring = xhci_urb_to_transfer_ring(xhci, urb); |
2691 | if (!ep_ring) | |
2692 | return -EINVAL; | |
2693 | ||
8a96c052 SS |
2694 | num_trbs = count_sg_trbs_needed(xhci, urb); |
2695 | num_sgs = urb->num_sgs; | |
4da6e6f2 SS |
2696 | total_packet_count = roundup(urb->transfer_buffer_length, |
2697 | le16_to_cpu(urb->ep->desc.wMaxPacketSize)); | |
8a96c052 | 2698 | |
23e3be11 | 2699 | trb_buff_len = prepare_transfer(xhci, xhci->devs[slot_id], |
e9df17eb | 2700 | ep_index, urb->stream_id, |
8e51adcc | 2701 | num_trbs, urb, 0, mem_flags); |
8a96c052 SS |
2702 | if (trb_buff_len < 0) |
2703 | return trb_buff_len; | |
8e51adcc AX |
2704 | |
2705 | urb_priv = urb->hcpriv; | |
2706 | td = urb_priv->td[0]; | |
2707 | ||
8a96c052 SS |
2708 | /* |
2709 | * Don't give the first TRB to the hardware (by toggling the cycle bit) | |
2710 | * until we've finished creating all the other TRBs. The ring's cycle | |
2711 | * state may change as we enqueue the other TRBs, so save it too. | |
2712 | */ | |
2713 | start_trb = &ep_ring->enqueue->generic; | |
2714 | start_cycle = ep_ring->cycle_state; | |
2715 | ||
2716 | running_total = 0; | |
2717 | /* | |
2718 | * How much data is in the first TRB? | |
2719 | * | |
2720 | * There are three forces at work for TRB buffer pointers and lengths: | |
2721 | * 1. We don't want to walk off the end of this sg-list entry buffer. | |
2722 | * 2. The transfer length that the driver requested may be smaller than | |
2723 | * the amount of memory allocated for this scatter-gather list. | |
2724 | * 3. TRBs buffers can't cross 64KB boundaries. | |
2725 | */ | |
910f8d0c | 2726 | sg = urb->sg; |
8a96c052 SS |
2727 | addr = (u64) sg_dma_address(sg); |
2728 | this_sg_len = sg_dma_len(sg); | |
a2490187 | 2729 | trb_buff_len = TRB_MAX_BUFF_SIZE - (addr & (TRB_MAX_BUFF_SIZE - 1)); |
8a96c052 SS |
2730 | trb_buff_len = min_t(int, trb_buff_len, this_sg_len); |
2731 | if (trb_buff_len > urb->transfer_buffer_length) | |
2732 | trb_buff_len = urb->transfer_buffer_length; | |
2733 | xhci_dbg(xhci, "First length to xfer from 1st sglist entry = %u\n", | |
2734 | trb_buff_len); | |
2735 | ||
2736 | first_trb = true; | |
2737 | /* Queue the first TRB, even if it's zero-length */ | |
2738 | do { | |
2739 | u32 field = 0; | |
f9dc68fe | 2740 | u32 length_field = 0; |
04dd950d | 2741 | u32 remainder = 0; |
8a96c052 SS |
2742 | |
2743 | /* Don't change the cycle bit of the first TRB until later */ | |
50f7b52a | 2744 | if (first_trb) { |
8a96c052 | 2745 | first_trb = false; |
50f7b52a AX |
2746 | if (start_cycle == 0) |
2747 | field |= 0x1; | |
2748 | } else | |
8a96c052 SS |
2749 | field |= ep_ring->cycle_state; |
2750 | ||
2751 | /* Chain all the TRBs together; clear the chain bit in the last | |
2752 | * TRB to indicate it's the last TRB in the chain. | |
2753 | */ | |
2754 | if (num_trbs > 1) { | |
2755 | field |= TRB_CHAIN; | |
2756 | } else { | |
2757 | /* FIXME - add check for ZERO_PACKET flag before this */ | |
2758 | td->last_trb = ep_ring->enqueue; | |
2759 | field |= TRB_IOC; | |
2760 | } | |
af8b9e63 SS |
2761 | |
2762 | /* Only set interrupt on short packet for IN endpoints */ | |
2763 | if (usb_urb_dir_in(urb)) | |
2764 | field |= TRB_ISP; | |
2765 | ||
8a96c052 SS |
2766 | xhci_dbg(xhci, " sg entry: dma = %#x, len = %#x (%d), " |
2767 | "64KB boundary at %#x, end dma = %#x\n", | |
2768 | (unsigned int) addr, trb_buff_len, trb_buff_len, | |
2769 | (unsigned int) (addr + TRB_MAX_BUFF_SIZE) & ~(TRB_MAX_BUFF_SIZE - 1), | |
2770 | (unsigned int) addr + trb_buff_len); | |
2771 | if (TRB_MAX_BUFF_SIZE - | |
a2490187 | 2772 | (addr & (TRB_MAX_BUFF_SIZE - 1)) < trb_buff_len) { |
8a96c052 SS |
2773 | xhci_warn(xhci, "WARN: sg dma xfer crosses 64KB boundaries!\n"); |
2774 | xhci_dbg(xhci, "Next boundary at %#x, end dma = %#x\n", | |
2775 | (unsigned int) (addr + TRB_MAX_BUFF_SIZE) & ~(TRB_MAX_BUFF_SIZE - 1), | |
2776 | (unsigned int) addr + trb_buff_len); | |
2777 | } | |
4da6e6f2 SS |
2778 | |
2779 | /* Set the TRB length, TD size, and interrupter fields. */ | |
2780 | if (xhci->hci_version < 0x100) { | |
2781 | remainder = xhci_td_remainder( | |
2782 | urb->transfer_buffer_length - | |
2783 | running_total); | |
2784 | } else { | |
2785 | remainder = xhci_v1_0_td_remainder(running_total, | |
2786 | trb_buff_len, total_packet_count, urb); | |
2787 | } | |
f9dc68fe | 2788 | length_field = TRB_LEN(trb_buff_len) | |
04dd950d | 2789 | remainder | |
f9dc68fe | 2790 | TRB_INTR_TARGET(0); |
4da6e6f2 | 2791 | |
6cc30d85 SS |
2792 | if (num_trbs > 1) |
2793 | more_trbs_coming = true; | |
2794 | else | |
2795 | more_trbs_coming = false; | |
2796 | queue_trb(xhci, ep_ring, false, more_trbs_coming, | |
8e595a5d SS |
2797 | lower_32_bits(addr), |
2798 | upper_32_bits(addr), | |
f9dc68fe | 2799 | length_field, |
af8b9e63 | 2800 | field | TRB_TYPE(TRB_NORMAL)); |
8a96c052 SS |
2801 | --num_trbs; |
2802 | running_total += trb_buff_len; | |
2803 | ||
2804 | /* Calculate length for next transfer -- | |
2805 | * Are we done queueing all the TRBs for this sg entry? | |
2806 | */ | |
2807 | this_sg_len -= trb_buff_len; | |
2808 | if (this_sg_len == 0) { | |
2809 | --num_sgs; | |
2810 | if (num_sgs == 0) | |
2811 | break; | |
2812 | sg = sg_next(sg); | |
2813 | addr = (u64) sg_dma_address(sg); | |
2814 | this_sg_len = sg_dma_len(sg); | |
2815 | } else { | |
2816 | addr += trb_buff_len; | |
2817 | } | |
2818 | ||
2819 | trb_buff_len = TRB_MAX_BUFF_SIZE - | |
a2490187 | 2820 | (addr & (TRB_MAX_BUFF_SIZE - 1)); |
8a96c052 SS |
2821 | trb_buff_len = min_t(int, trb_buff_len, this_sg_len); |
2822 | if (running_total + trb_buff_len > urb->transfer_buffer_length) | |
2823 | trb_buff_len = | |
2824 | urb->transfer_buffer_length - running_total; | |
2825 | } while (running_total < urb->transfer_buffer_length); | |
2826 | ||
2827 | check_trb_math(urb, num_trbs, running_total); | |
e9df17eb | 2828 | giveback_first_trb(xhci, slot_id, ep_index, urb->stream_id, |
e1eab2e0 | 2829 | start_cycle, start_trb); |
8a96c052 SS |
2830 | return 0; |
2831 | } | |
2832 | ||
b10de142 | 2833 | /* This is very similar to what ehci-q.c qtd_fill() does */ |
23e3be11 | 2834 | int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, |
b10de142 SS |
2835 | struct urb *urb, int slot_id, unsigned int ep_index) |
2836 | { | |
2837 | struct xhci_ring *ep_ring; | |
8e51adcc | 2838 | struct urb_priv *urb_priv; |
b10de142 SS |
2839 | struct xhci_td *td; |
2840 | int num_trbs; | |
2841 | struct xhci_generic_trb *start_trb; | |
2842 | bool first_trb; | |
6cc30d85 | 2843 | bool more_trbs_coming; |
b10de142 | 2844 | int start_cycle; |
f9dc68fe | 2845 | u32 field, length_field; |
b10de142 SS |
2846 | |
2847 | int running_total, trb_buff_len, ret; | |
4da6e6f2 | 2848 | unsigned int total_packet_count; |
b10de142 SS |
2849 | u64 addr; |
2850 | ||
ff9c895f | 2851 | if (urb->num_sgs) |
8a96c052 SS |
2852 | return queue_bulk_sg_tx(xhci, mem_flags, urb, slot_id, ep_index); |
2853 | ||
e9df17eb SS |
2854 | ep_ring = xhci_urb_to_transfer_ring(xhci, urb); |
2855 | if (!ep_ring) | |
2856 | return -EINVAL; | |
b10de142 SS |
2857 | |
2858 | num_trbs = 0; | |
2859 | /* How much data is (potentially) left before the 64KB boundary? */ | |
2860 | running_total = TRB_MAX_BUFF_SIZE - | |
a2490187 | 2861 | (urb->transfer_dma & (TRB_MAX_BUFF_SIZE - 1)); |
5807795b | 2862 | running_total &= TRB_MAX_BUFF_SIZE - 1; |
b10de142 SS |
2863 | |
2864 | /* If there's some data on this 64KB chunk, or we have to send a | |
2865 | * zero-length transfer, we need at least one TRB | |
2866 | */ | |
2867 | if (running_total != 0 || urb->transfer_buffer_length == 0) | |
2868 | num_trbs++; | |
2869 | /* How many more 64KB chunks to transfer, how many more TRBs? */ | |
2870 | while (running_total < urb->transfer_buffer_length) { | |
2871 | num_trbs++; | |
2872 | running_total += TRB_MAX_BUFF_SIZE; | |
2873 | } | |
2874 | /* FIXME: this doesn't deal with URB_ZERO_PACKET - need one more */ | |
2875 | ||
2876 | if (!in_interrupt()) | |
f2c565e2 AX |
2877 | xhci_dbg(xhci, "ep %#x - urb len = %#x (%d), " |
2878 | "addr = %#llx, num_trbs = %d\n", | |
b10de142 | 2879 | urb->ep->desc.bEndpointAddress, |
8a96c052 SS |
2880 | urb->transfer_buffer_length, |
2881 | urb->transfer_buffer_length, | |
700e2052 | 2882 | (unsigned long long)urb->transfer_dma, |
b10de142 | 2883 | num_trbs); |
8a96c052 | 2884 | |
e9df17eb SS |
2885 | ret = prepare_transfer(xhci, xhci->devs[slot_id], |
2886 | ep_index, urb->stream_id, | |
8e51adcc | 2887 | num_trbs, urb, 0, mem_flags); |
b10de142 SS |
2888 | if (ret < 0) |
2889 | return ret; | |
2890 | ||
8e51adcc AX |
2891 | urb_priv = urb->hcpriv; |
2892 | td = urb_priv->td[0]; | |
2893 | ||
b10de142 SS |
2894 | /* |
2895 | * Don't give the first TRB to the hardware (by toggling the cycle bit) | |
2896 | * until we've finished creating all the other TRBs. The ring's cycle | |
2897 | * state may change as we enqueue the other TRBs, so save it too. | |
2898 | */ | |
2899 | start_trb = &ep_ring->enqueue->generic; | |
2900 | start_cycle = ep_ring->cycle_state; | |
2901 | ||
2902 | running_total = 0; | |
4da6e6f2 SS |
2903 | total_packet_count = roundup(urb->transfer_buffer_length, |
2904 | le16_to_cpu(urb->ep->desc.wMaxPacketSize)); | |
b10de142 SS |
2905 | /* How much data is in the first TRB? */ |
2906 | addr = (u64) urb->transfer_dma; | |
2907 | trb_buff_len = TRB_MAX_BUFF_SIZE - | |
a2490187 PZ |
2908 | (urb->transfer_dma & (TRB_MAX_BUFF_SIZE - 1)); |
2909 | if (trb_buff_len > urb->transfer_buffer_length) | |
b10de142 SS |
2910 | trb_buff_len = urb->transfer_buffer_length; |
2911 | ||
2912 | first_trb = true; | |
2913 | ||
2914 | /* Queue the first TRB, even if it's zero-length */ | |
2915 | do { | |
04dd950d | 2916 | u32 remainder = 0; |
b10de142 SS |
2917 | field = 0; |
2918 | ||
2919 | /* Don't change the cycle bit of the first TRB until later */ | |
50f7b52a | 2920 | if (first_trb) { |
b10de142 | 2921 | first_trb = false; |
50f7b52a AX |
2922 | if (start_cycle == 0) |
2923 | field |= 0x1; | |
2924 | } else | |
b10de142 SS |
2925 | field |= ep_ring->cycle_state; |
2926 | ||
2927 | /* Chain all the TRBs together; clear the chain bit in the last | |
2928 | * TRB to indicate it's the last TRB in the chain. | |
2929 | */ | |
2930 | if (num_trbs > 1) { | |
2931 | field |= TRB_CHAIN; | |
2932 | } else { | |
2933 | /* FIXME - add check for ZERO_PACKET flag before this */ | |
2934 | td->last_trb = ep_ring->enqueue; | |
2935 | field |= TRB_IOC; | |
2936 | } | |
af8b9e63 SS |
2937 | |
2938 | /* Only set interrupt on short packet for IN endpoints */ | |
2939 | if (usb_urb_dir_in(urb)) | |
2940 | field |= TRB_ISP; | |
2941 | ||
4da6e6f2 SS |
2942 | /* Set the TRB length, TD size, and interrupter fields. */ |
2943 | if (xhci->hci_version < 0x100) { | |
2944 | remainder = xhci_td_remainder( | |
2945 | urb->transfer_buffer_length - | |
2946 | running_total); | |
2947 | } else { | |
2948 | remainder = xhci_v1_0_td_remainder(running_total, | |
2949 | trb_buff_len, total_packet_count, urb); | |
2950 | } | |
f9dc68fe | 2951 | length_field = TRB_LEN(trb_buff_len) | |
04dd950d | 2952 | remainder | |
f9dc68fe | 2953 | TRB_INTR_TARGET(0); |
4da6e6f2 | 2954 | |
6cc30d85 SS |
2955 | if (num_trbs > 1) |
2956 | more_trbs_coming = true; | |
2957 | else | |
2958 | more_trbs_coming = false; | |
2959 | queue_trb(xhci, ep_ring, false, more_trbs_coming, | |
8e595a5d SS |
2960 | lower_32_bits(addr), |
2961 | upper_32_bits(addr), | |
f9dc68fe | 2962 | length_field, |
af8b9e63 | 2963 | field | TRB_TYPE(TRB_NORMAL)); |
b10de142 SS |
2964 | --num_trbs; |
2965 | running_total += trb_buff_len; | |
2966 | ||
2967 | /* Calculate length for next transfer */ | |
2968 | addr += trb_buff_len; | |
2969 | trb_buff_len = urb->transfer_buffer_length - running_total; | |
2970 | if (trb_buff_len > TRB_MAX_BUFF_SIZE) | |
2971 | trb_buff_len = TRB_MAX_BUFF_SIZE; | |
2972 | } while (running_total < urb->transfer_buffer_length); | |
2973 | ||
8a96c052 | 2974 | check_trb_math(urb, num_trbs, running_total); |
e9df17eb | 2975 | giveback_first_trb(xhci, slot_id, ep_index, urb->stream_id, |
e1eab2e0 | 2976 | start_cycle, start_trb); |
b10de142 SS |
2977 | return 0; |
2978 | } | |
2979 | ||
d0e96f5a | 2980 | /* Caller must have locked xhci->lock */ |
23e3be11 | 2981 | int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags, |
d0e96f5a SS |
2982 | struct urb *urb, int slot_id, unsigned int ep_index) |
2983 | { | |
2984 | struct xhci_ring *ep_ring; | |
2985 | int num_trbs; | |
2986 | int ret; | |
2987 | struct usb_ctrlrequest *setup; | |
2988 | struct xhci_generic_trb *start_trb; | |
2989 | int start_cycle; | |
f9dc68fe | 2990 | u32 field, length_field; |
8e51adcc | 2991 | struct urb_priv *urb_priv; |
d0e96f5a SS |
2992 | struct xhci_td *td; |
2993 | ||
e9df17eb SS |
2994 | ep_ring = xhci_urb_to_transfer_ring(xhci, urb); |
2995 | if (!ep_ring) | |
2996 | return -EINVAL; | |
d0e96f5a SS |
2997 | |
2998 | /* | |
2999 | * Need to copy setup packet into setup TRB, so we can't use the setup | |
3000 | * DMA address. | |
3001 | */ | |
3002 | if (!urb->setup_packet) | |
3003 | return -EINVAL; | |
3004 | ||
3005 | if (!in_interrupt()) | |
3006 | xhci_dbg(xhci, "Queueing ctrl tx for slot id %d, ep %d\n", | |
3007 | slot_id, ep_index); | |
3008 | /* 1 TRB for setup, 1 for status */ | |
3009 | num_trbs = 2; | |
3010 | /* | |
3011 | * Don't need to check if we need additional event data and normal TRBs, | |
3012 | * since data in control transfers will never get bigger than 16MB | |
3013 | * XXX: can we get a buffer that crosses 64KB boundaries? | |
3014 | */ | |
3015 | if (urb->transfer_buffer_length > 0) | |
3016 | num_trbs++; | |
e9df17eb SS |
3017 | ret = prepare_transfer(xhci, xhci->devs[slot_id], |
3018 | ep_index, urb->stream_id, | |
8e51adcc | 3019 | num_trbs, urb, 0, mem_flags); |
d0e96f5a SS |
3020 | if (ret < 0) |
3021 | return ret; | |
3022 | ||
8e51adcc AX |
3023 | urb_priv = urb->hcpriv; |
3024 | td = urb_priv->td[0]; | |
3025 | ||
d0e96f5a SS |
3026 | /* |
3027 | * Don't give the first TRB to the hardware (by toggling the cycle bit) | |
3028 | * until we've finished creating all the other TRBs. The ring's cycle | |
3029 | * state may change as we enqueue the other TRBs, so save it too. | |
3030 | */ | |
3031 | start_trb = &ep_ring->enqueue->generic; | |
3032 | start_cycle = ep_ring->cycle_state; | |
3033 | ||
3034 | /* Queue setup TRB - see section 6.4.1.2.1 */ | |
3035 | /* FIXME better way to translate setup_packet into two u32 fields? */ | |
3036 | setup = (struct usb_ctrlrequest *) urb->setup_packet; | |
50f7b52a AX |
3037 | field = 0; |
3038 | field |= TRB_IDT | TRB_TYPE(TRB_SETUP); | |
3039 | if (start_cycle == 0) | |
3040 | field |= 0x1; | |
b83cdc8f AX |
3041 | |
3042 | /* xHCI 1.0 6.4.1.2.1: Transfer Type field */ | |
3043 | if (xhci->hci_version == 0x100) { | |
3044 | if (urb->transfer_buffer_length > 0) { | |
3045 | if (setup->bRequestType & USB_DIR_IN) | |
3046 | field |= TRB_TX_TYPE(TRB_DATA_IN); | |
3047 | else | |
3048 | field |= TRB_TX_TYPE(TRB_DATA_OUT); | |
3049 | } | |
3050 | } | |
3051 | ||
6cc30d85 | 3052 | queue_trb(xhci, ep_ring, false, true, |
28ccd296 ME |
3053 | setup->bRequestType | setup->bRequest << 8 | le16_to_cpu(setup->wValue) << 16, |
3054 | le16_to_cpu(setup->wIndex) | le16_to_cpu(setup->wLength) << 16, | |
3055 | TRB_LEN(8) | TRB_INTR_TARGET(0), | |
3056 | /* Immediate data in pointer */ | |
3057 | field); | |
d0e96f5a SS |
3058 | |
3059 | /* If there's data, queue data TRBs */ | |
af8b9e63 SS |
3060 | /* Only set interrupt on short packet for IN endpoints */ |
3061 | if (usb_urb_dir_in(urb)) | |
3062 | field = TRB_ISP | TRB_TYPE(TRB_DATA); | |
3063 | else | |
3064 | field = TRB_TYPE(TRB_DATA); | |
3065 | ||
f9dc68fe | 3066 | length_field = TRB_LEN(urb->transfer_buffer_length) | |
04dd950d | 3067 | xhci_td_remainder(urb->transfer_buffer_length) | |
f9dc68fe | 3068 | TRB_INTR_TARGET(0); |
d0e96f5a SS |
3069 | if (urb->transfer_buffer_length > 0) { |
3070 | if (setup->bRequestType & USB_DIR_IN) | |
3071 | field |= TRB_DIR_IN; | |
6cc30d85 | 3072 | queue_trb(xhci, ep_ring, false, true, |
d0e96f5a SS |
3073 | lower_32_bits(urb->transfer_dma), |
3074 | upper_32_bits(urb->transfer_dma), | |
f9dc68fe | 3075 | length_field, |
af8b9e63 | 3076 | field | ep_ring->cycle_state); |
d0e96f5a SS |
3077 | } |
3078 | ||
3079 | /* Save the DMA address of the last TRB in the TD */ | |
3080 | td->last_trb = ep_ring->enqueue; | |
3081 | ||
3082 | /* Queue status TRB - see Table 7 and sections 4.11.2.2 and 6.4.1.2.3 */ | |
3083 | /* If the device sent data, the status stage is an OUT transfer */ | |
3084 | if (urb->transfer_buffer_length > 0 && setup->bRequestType & USB_DIR_IN) | |
3085 | field = 0; | |
3086 | else | |
3087 | field = TRB_DIR_IN; | |
6cc30d85 | 3088 | queue_trb(xhci, ep_ring, false, false, |
d0e96f5a SS |
3089 | 0, |
3090 | 0, | |
3091 | TRB_INTR_TARGET(0), | |
3092 | /* Event on completion */ | |
3093 | field | TRB_IOC | TRB_TYPE(TRB_STATUS) | ep_ring->cycle_state); | |
3094 | ||
e9df17eb | 3095 | giveback_first_trb(xhci, slot_id, ep_index, 0, |
e1eab2e0 | 3096 | start_cycle, start_trb); |
d0e96f5a SS |
3097 | return 0; |
3098 | } | |
3099 | ||
04e51901 AX |
3100 | static int count_isoc_trbs_needed(struct xhci_hcd *xhci, |
3101 | struct urb *urb, int i) | |
3102 | { | |
3103 | int num_trbs = 0; | |
3104 | u64 addr, td_len, running_total; | |
3105 | ||
3106 | addr = (u64) (urb->transfer_dma + urb->iso_frame_desc[i].offset); | |
3107 | td_len = urb->iso_frame_desc[i].length; | |
3108 | ||
a2490187 | 3109 | running_total = TRB_MAX_BUFF_SIZE - (addr & (TRB_MAX_BUFF_SIZE - 1)); |
5807795b | 3110 | running_total &= TRB_MAX_BUFF_SIZE - 1; |
04e51901 AX |
3111 | if (running_total != 0) |
3112 | num_trbs++; | |
3113 | ||
3114 | while (running_total < td_len) { | |
3115 | num_trbs++; | |
3116 | running_total += TRB_MAX_BUFF_SIZE; | |
3117 | } | |
3118 | ||
3119 | return num_trbs; | |
3120 | } | |
3121 | ||
5cd43e33 SS |
3122 | /* |
3123 | * The transfer burst count field of the isochronous TRB defines the number of | |
3124 | * bursts that are required to move all packets in this TD. Only SuperSpeed | |
3125 | * devices can burst up to bMaxBurst number of packets per service interval. | |
3126 | * This field is zero based, meaning a value of zero in the field means one | |
3127 | * burst. Basically, for everything but SuperSpeed devices, this field will be | |
3128 | * zero. Only xHCI 1.0 host controllers support this field. | |
3129 | */ | |
3130 | static unsigned int xhci_get_burst_count(struct xhci_hcd *xhci, | |
3131 | struct usb_device *udev, | |
3132 | struct urb *urb, unsigned int total_packet_count) | |
3133 | { | |
3134 | unsigned int max_burst; | |
3135 | ||
3136 | if (xhci->hci_version < 0x100 || udev->speed != USB_SPEED_SUPER) | |
3137 | return 0; | |
3138 | ||
3139 | max_burst = urb->ep->ss_ep_comp.bMaxBurst; | |
3140 | return roundup(total_packet_count, max_burst + 1) - 1; | |
3141 | } | |
3142 | ||
b61d378f SS |
3143 | /* |
3144 | * Returns the number of packets in the last "burst" of packets. This field is | |
3145 | * valid for all speeds of devices. USB 2.0 devices can only do one "burst", so | |
3146 | * the last burst packet count is equal to the total number of packets in the | |
3147 | * TD. SuperSpeed endpoints can have up to 3 bursts. All but the last burst | |
3148 | * must contain (bMaxBurst + 1) number of packets, but the last burst can | |
3149 | * contain 1 to (bMaxBurst + 1) packets. | |
3150 | */ | |
3151 | static unsigned int xhci_get_last_burst_packet_count(struct xhci_hcd *xhci, | |
3152 | struct usb_device *udev, | |
3153 | struct urb *urb, unsigned int total_packet_count) | |
3154 | { | |
3155 | unsigned int max_burst; | |
3156 | unsigned int residue; | |
3157 | ||
3158 | if (xhci->hci_version < 0x100) | |
3159 | return 0; | |
3160 | ||
3161 | switch (udev->speed) { | |
3162 | case USB_SPEED_SUPER: | |
3163 | /* bMaxBurst is zero based: 0 means 1 packet per burst */ | |
3164 | max_burst = urb->ep->ss_ep_comp.bMaxBurst; | |
3165 | residue = total_packet_count % (max_burst + 1); | |
3166 | /* If residue is zero, the last burst contains (max_burst + 1) | |
3167 | * number of packets, but the TLBPC field is zero-based. | |
3168 | */ | |
3169 | if (residue == 0) | |
3170 | return max_burst; | |
3171 | return residue - 1; | |
3172 | default: | |
3173 | if (total_packet_count == 0) | |
3174 | return 0; | |
3175 | return total_packet_count - 1; | |
3176 | } | |
3177 | } | |
3178 | ||
04e51901 AX |
3179 | /* This is for isoc transfer */ |
3180 | static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags, | |
3181 | struct urb *urb, int slot_id, unsigned int ep_index) | |
3182 | { | |
3183 | struct xhci_ring *ep_ring; | |
3184 | struct urb_priv *urb_priv; | |
3185 | struct xhci_td *td; | |
3186 | int num_tds, trbs_per_td; | |
3187 | struct xhci_generic_trb *start_trb; | |
3188 | bool first_trb; | |
3189 | int start_cycle; | |
3190 | u32 field, length_field; | |
3191 | int running_total, trb_buff_len, td_len, td_remain_len, ret; | |
3192 | u64 start_addr, addr; | |
3193 | int i, j; | |
47cbf692 | 3194 | bool more_trbs_coming; |
04e51901 AX |
3195 | |
3196 | ep_ring = xhci->devs[slot_id]->eps[ep_index].ring; | |
3197 | ||
3198 | num_tds = urb->number_of_packets; | |
3199 | if (num_tds < 1) { | |
3200 | xhci_dbg(xhci, "Isoc URB with zero packets?\n"); | |
3201 | return -EINVAL; | |
3202 | } | |
3203 | ||
3204 | if (!in_interrupt()) | |
f2c565e2 | 3205 | xhci_dbg(xhci, "ep %#x - urb len = %#x (%d)," |
04e51901 AX |
3206 | " addr = %#llx, num_tds = %d\n", |
3207 | urb->ep->desc.bEndpointAddress, | |
3208 | urb->transfer_buffer_length, | |
3209 | urb->transfer_buffer_length, | |
3210 | (unsigned long long)urb->transfer_dma, | |
3211 | num_tds); | |
3212 | ||
3213 | start_addr = (u64) urb->transfer_dma; | |
3214 | start_trb = &ep_ring->enqueue->generic; | |
3215 | start_cycle = ep_ring->cycle_state; | |
3216 | ||
3217 | /* Queue the first TRB, even if it's zero-length */ | |
3218 | for (i = 0; i < num_tds; i++) { | |
4da6e6f2 | 3219 | unsigned int total_packet_count; |
5cd43e33 | 3220 | unsigned int burst_count; |
b61d378f | 3221 | unsigned int residue; |
04e51901 | 3222 | |
4da6e6f2 | 3223 | first_trb = true; |
04e51901 AX |
3224 | running_total = 0; |
3225 | addr = start_addr + urb->iso_frame_desc[i].offset; | |
3226 | td_len = urb->iso_frame_desc[i].length; | |
3227 | td_remain_len = td_len; | |
5cd43e33 | 3228 | /* FIXME: Ignoring zero-length packets, can those happen? */ |
4da6e6f2 SS |
3229 | total_packet_count = roundup(td_len, |
3230 | le16_to_cpu(urb->ep->desc.wMaxPacketSize)); | |
5cd43e33 SS |
3231 | burst_count = xhci_get_burst_count(xhci, urb->dev, urb, |
3232 | total_packet_count); | |
b61d378f SS |
3233 | residue = xhci_get_last_burst_packet_count(xhci, |
3234 | urb->dev, urb, total_packet_count); | |
04e51901 AX |
3235 | |
3236 | trbs_per_td = count_isoc_trbs_needed(xhci, urb, i); | |
3237 | ||
3238 | ret = prepare_transfer(xhci, xhci->devs[slot_id], ep_index, | |
3239 | urb->stream_id, trbs_per_td, urb, i, mem_flags); | |
3240 | if (ret < 0) | |
3241 | return ret; | |
3242 | ||
3243 | urb_priv = urb->hcpriv; | |
3244 | td = urb_priv->td[i]; | |
3245 | ||
3246 | for (j = 0; j < trbs_per_td; j++) { | |
3247 | u32 remainder = 0; | |
b61d378f | 3248 | field = TRB_TBC(burst_count) | TRB_TLBPC(residue); |
04e51901 AX |
3249 | |
3250 | if (first_trb) { | |
3251 | /* Queue the isoc TRB */ | |
3252 | field |= TRB_TYPE(TRB_ISOC); | |
3253 | /* Assume URB_ISO_ASAP is set */ | |
3254 | field |= TRB_SIA; | |
50f7b52a AX |
3255 | if (i == 0) { |
3256 | if (start_cycle == 0) | |
3257 | field |= 0x1; | |
3258 | } else | |
04e51901 AX |
3259 | field |= ep_ring->cycle_state; |
3260 | first_trb = false; | |
3261 | } else { | |
3262 | /* Queue other normal TRBs */ | |
3263 | field |= TRB_TYPE(TRB_NORMAL); | |
3264 | field |= ep_ring->cycle_state; | |
3265 | } | |
3266 | ||
af8b9e63 SS |
3267 | /* Only set interrupt on short packet for IN EPs */ |
3268 | if (usb_urb_dir_in(urb)) | |
3269 | field |= TRB_ISP; | |
3270 | ||
04e51901 AX |
3271 | /* Chain all the TRBs together; clear the chain bit in |
3272 | * the last TRB to indicate it's the last TRB in the | |
3273 | * chain. | |
3274 | */ | |
3275 | if (j < trbs_per_td - 1) { | |
3276 | field |= TRB_CHAIN; | |
47cbf692 | 3277 | more_trbs_coming = true; |
04e51901 AX |
3278 | } else { |
3279 | td->last_trb = ep_ring->enqueue; | |
3280 | field |= TRB_IOC; | |
ad106f29 AX |
3281 | if (xhci->hci_version == 0x100) { |
3282 | /* Set BEI bit except for the last td */ | |
3283 | if (i < num_tds - 1) | |
3284 | field |= TRB_BEI; | |
3285 | } | |
47cbf692 | 3286 | more_trbs_coming = false; |
04e51901 AX |
3287 | } |
3288 | ||
3289 | /* Calculate TRB length */ | |
3290 | trb_buff_len = TRB_MAX_BUFF_SIZE - | |
3291 | (addr & ((1 << TRB_MAX_BUFF_SHIFT) - 1)); | |
3292 | if (trb_buff_len > td_remain_len) | |
3293 | trb_buff_len = td_remain_len; | |
3294 | ||
4da6e6f2 SS |
3295 | /* Set the TRB length, TD size, & interrupter fields. */ |
3296 | if (xhci->hci_version < 0x100) { | |
3297 | remainder = xhci_td_remainder( | |
3298 | td_len - running_total); | |
3299 | } else { | |
3300 | remainder = xhci_v1_0_td_remainder( | |
3301 | running_total, trb_buff_len, | |
3302 | total_packet_count, urb); | |
3303 | } | |
04e51901 AX |
3304 | length_field = TRB_LEN(trb_buff_len) | |
3305 | remainder | | |
3306 | TRB_INTR_TARGET(0); | |
4da6e6f2 | 3307 | |
47cbf692 | 3308 | queue_trb(xhci, ep_ring, false, more_trbs_coming, |
04e51901 AX |
3309 | lower_32_bits(addr), |
3310 | upper_32_bits(addr), | |
3311 | length_field, | |
af8b9e63 | 3312 | field); |
04e51901 AX |
3313 | running_total += trb_buff_len; |
3314 | ||
3315 | addr += trb_buff_len; | |
3316 | td_remain_len -= trb_buff_len; | |
3317 | } | |
3318 | ||
3319 | /* Check TD length */ | |
3320 | if (running_total != td_len) { | |
3321 | xhci_err(xhci, "ISOC TD length unmatch\n"); | |
3322 | return -EINVAL; | |
3323 | } | |
3324 | } | |
3325 | ||
c41136b0 AX |
3326 | if (xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs == 0) { |
3327 | if (xhci->quirks & XHCI_AMD_PLL_FIX) | |
3328 | usb_amd_quirk_pll_disable(); | |
3329 | } | |
3330 | xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs++; | |
3331 | ||
e1eab2e0 AX |
3332 | giveback_first_trb(xhci, slot_id, ep_index, urb->stream_id, |
3333 | start_cycle, start_trb); | |
04e51901 AX |
3334 | return 0; |
3335 | } | |
3336 | ||
3337 | /* | |
3338 | * Check transfer ring to guarantee there is enough room for the urb. | |
3339 | * Update ISO URB start_frame and interval. | |
3340 | * Update interval as xhci_queue_intr_tx does. Just use xhci frame_index to | |
3341 | * update the urb->start_frame by now. | |
3342 | * Always assume URB_ISO_ASAP set, and NEVER use urb->start_frame as input. | |
3343 | */ | |
3344 | int xhci_queue_isoc_tx_prepare(struct xhci_hcd *xhci, gfp_t mem_flags, | |
3345 | struct urb *urb, int slot_id, unsigned int ep_index) | |
3346 | { | |
3347 | struct xhci_virt_device *xdev; | |
3348 | struct xhci_ring *ep_ring; | |
3349 | struct xhci_ep_ctx *ep_ctx; | |
3350 | int start_frame; | |
3351 | int xhci_interval; | |
3352 | int ep_interval; | |
3353 | int num_tds, num_trbs, i; | |
3354 | int ret; | |
3355 | ||
3356 | xdev = xhci->devs[slot_id]; | |
3357 | ep_ring = xdev->eps[ep_index].ring; | |
3358 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); | |
3359 | ||
3360 | num_trbs = 0; | |
3361 | num_tds = urb->number_of_packets; | |
3362 | for (i = 0; i < num_tds; i++) | |
3363 | num_trbs += count_isoc_trbs_needed(xhci, urb, i); | |
3364 | ||
3365 | /* Check the ring to guarantee there is enough room for the whole urb. | |
3366 | * Do not insert any td of the urb to the ring if the check failed. | |
3367 | */ | |
28ccd296 ME |
3368 | ret = prepare_ring(xhci, ep_ring, le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK, |
3369 | num_trbs, mem_flags); | |
04e51901 AX |
3370 | if (ret) |
3371 | return ret; | |
3372 | ||
3373 | start_frame = xhci_readl(xhci, &xhci->run_regs->microframe_index); | |
3374 | start_frame &= 0x3fff; | |
3375 | ||
3376 | urb->start_frame = start_frame; | |
3377 | if (urb->dev->speed == USB_SPEED_LOW || | |
3378 | urb->dev->speed == USB_SPEED_FULL) | |
3379 | urb->start_frame >>= 3; | |
3380 | ||
28ccd296 | 3381 | xhci_interval = EP_INTERVAL_TO_UFRAMES(le32_to_cpu(ep_ctx->ep_info)); |
04e51901 AX |
3382 | ep_interval = urb->interval; |
3383 | /* Convert to microframes */ | |
3384 | if (urb->dev->speed == USB_SPEED_LOW || | |
3385 | urb->dev->speed == USB_SPEED_FULL) | |
3386 | ep_interval *= 8; | |
3387 | /* FIXME change this to a warning and a suggestion to use the new API | |
3388 | * to set the polling interval (once the API is added). | |
3389 | */ | |
3390 | if (xhci_interval != ep_interval) { | |
7961acd7 | 3391 | if (printk_ratelimit()) |
04e51901 AX |
3392 | dev_dbg(&urb->dev->dev, "Driver uses different interval" |
3393 | " (%d microframe%s) than xHCI " | |
3394 | "(%d microframe%s)\n", | |
3395 | ep_interval, | |
3396 | ep_interval == 1 ? "" : "s", | |
3397 | xhci_interval, | |
3398 | xhci_interval == 1 ? "" : "s"); | |
3399 | urb->interval = xhci_interval; | |
3400 | /* Convert back to frames for LS/FS devices */ | |
3401 | if (urb->dev->speed == USB_SPEED_LOW || | |
3402 | urb->dev->speed == USB_SPEED_FULL) | |
3403 | urb->interval /= 8; | |
3404 | } | |
3405 | return xhci_queue_isoc_tx(xhci, GFP_ATOMIC, urb, slot_id, ep_index); | |
3406 | } | |
3407 | ||
d0e96f5a SS |
3408 | /**** Command Ring Operations ****/ |
3409 | ||
913a8a34 SS |
3410 | /* Generic function for queueing a command TRB on the command ring. |
3411 | * Check to make sure there's room on the command ring for one command TRB. | |
3412 | * Also check that there's room reserved for commands that must not fail. | |
3413 | * If this is a command that must not fail, meaning command_must_succeed = TRUE, | |
3414 | * then only check for the number of reserved spots. | |
3415 | * Don't decrement xhci->cmd_ring_reserved_trbs after we've queued the TRB | |
3416 | * because the command event handler may want to resubmit a failed command. | |
3417 | */ | |
3418 | static int queue_command(struct xhci_hcd *xhci, u32 field1, u32 field2, | |
3419 | u32 field3, u32 field4, bool command_must_succeed) | |
7f84eef0 | 3420 | { |
913a8a34 | 3421 | int reserved_trbs = xhci->cmd_ring_reserved_trbs; |
d1dc908a SS |
3422 | int ret; |
3423 | ||
913a8a34 SS |
3424 | if (!command_must_succeed) |
3425 | reserved_trbs++; | |
3426 | ||
d1dc908a SS |
3427 | ret = prepare_ring(xhci, xhci->cmd_ring, EP_STATE_RUNNING, |
3428 | reserved_trbs, GFP_ATOMIC); | |
3429 | if (ret < 0) { | |
3430 | xhci_err(xhci, "ERR: No room for command on command ring\n"); | |
913a8a34 SS |
3431 | if (command_must_succeed) |
3432 | xhci_err(xhci, "ERR: Reserved TRB counting for " | |
3433 | "unfailable commands failed.\n"); | |
d1dc908a | 3434 | return ret; |
7f84eef0 | 3435 | } |
6cc30d85 | 3436 | queue_trb(xhci, xhci->cmd_ring, false, false, field1, field2, field3, |
7f84eef0 SS |
3437 | field4 | xhci->cmd_ring->cycle_state); |
3438 | return 0; | |
3439 | } | |
3440 | ||
3ffbba95 | 3441 | /* Queue a slot enable or disable request on the command ring */ |
23e3be11 | 3442 | int xhci_queue_slot_control(struct xhci_hcd *xhci, u32 trb_type, u32 slot_id) |
3ffbba95 SS |
3443 | { |
3444 | return queue_command(xhci, 0, 0, 0, | |
913a8a34 | 3445 | TRB_TYPE(trb_type) | SLOT_ID_FOR_TRB(slot_id), false); |
3ffbba95 SS |
3446 | } |
3447 | ||
3448 | /* Queue an address device command TRB */ | |
23e3be11 SS |
3449 | int xhci_queue_address_device(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr, |
3450 | u32 slot_id) | |
3ffbba95 | 3451 | { |
8e595a5d SS |
3452 | return queue_command(xhci, lower_32_bits(in_ctx_ptr), |
3453 | upper_32_bits(in_ctx_ptr), 0, | |
913a8a34 | 3454 | TRB_TYPE(TRB_ADDR_DEV) | SLOT_ID_FOR_TRB(slot_id), |
2a8f82c4 SS |
3455 | false); |
3456 | } | |
3457 | ||
0238634d SS |
3458 | int xhci_queue_vendor_command(struct xhci_hcd *xhci, |
3459 | u32 field1, u32 field2, u32 field3, u32 field4) | |
3460 | { | |
3461 | return queue_command(xhci, field1, field2, field3, field4, false); | |
3462 | } | |
3463 | ||
2a8f82c4 SS |
3464 | /* Queue a reset device command TRB */ |
3465 | int xhci_queue_reset_device(struct xhci_hcd *xhci, u32 slot_id) | |
3466 | { | |
3467 | return queue_command(xhci, 0, 0, 0, | |
3468 | TRB_TYPE(TRB_RESET_DEV) | SLOT_ID_FOR_TRB(slot_id), | |
913a8a34 | 3469 | false); |
3ffbba95 | 3470 | } |
f94e0186 SS |
3471 | |
3472 | /* Queue a configure endpoint command TRB */ | |
23e3be11 | 3473 | int xhci_queue_configure_endpoint(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr, |
913a8a34 | 3474 | u32 slot_id, bool command_must_succeed) |
f94e0186 | 3475 | { |
8e595a5d SS |
3476 | return queue_command(xhci, lower_32_bits(in_ctx_ptr), |
3477 | upper_32_bits(in_ctx_ptr), 0, | |
913a8a34 SS |
3478 | TRB_TYPE(TRB_CONFIG_EP) | SLOT_ID_FOR_TRB(slot_id), |
3479 | command_must_succeed); | |
f94e0186 | 3480 | } |
ae636747 | 3481 | |
f2217e8e SS |
3482 | /* Queue an evaluate context command TRB */ |
3483 | int xhci_queue_evaluate_context(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr, | |
3484 | u32 slot_id) | |
3485 | { | |
3486 | return queue_command(xhci, lower_32_bits(in_ctx_ptr), | |
3487 | upper_32_bits(in_ctx_ptr), 0, | |
913a8a34 SS |
3488 | TRB_TYPE(TRB_EVAL_CONTEXT) | SLOT_ID_FOR_TRB(slot_id), |
3489 | false); | |
f2217e8e SS |
3490 | } |
3491 | ||
be88fe4f AX |
3492 | /* |
3493 | * Suspend is set to indicate "Stop Endpoint Command" is being issued to stop | |
3494 | * activity on an endpoint that is about to be suspended. | |
3495 | */ | |
23e3be11 | 3496 | int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, int slot_id, |
be88fe4f | 3497 | unsigned int ep_index, int suspend) |
ae636747 SS |
3498 | { |
3499 | u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id); | |
3500 | u32 trb_ep_index = EP_ID_FOR_TRB(ep_index); | |
3501 | u32 type = TRB_TYPE(TRB_STOP_RING); | |
be88fe4f | 3502 | u32 trb_suspend = SUSPEND_PORT_FOR_TRB(suspend); |
ae636747 SS |
3503 | |
3504 | return queue_command(xhci, 0, 0, 0, | |
be88fe4f | 3505 | trb_slot_id | trb_ep_index | type | trb_suspend, false); |
ae636747 SS |
3506 | } |
3507 | ||
3508 | /* Set Transfer Ring Dequeue Pointer command. | |
3509 | * This should not be used for endpoints that have streams enabled. | |
3510 | */ | |
3511 | static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id, | |
e9df17eb SS |
3512 | unsigned int ep_index, unsigned int stream_id, |
3513 | struct xhci_segment *deq_seg, | |
ae636747 SS |
3514 | union xhci_trb *deq_ptr, u32 cycle_state) |
3515 | { | |
3516 | dma_addr_t addr; | |
3517 | u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id); | |
3518 | u32 trb_ep_index = EP_ID_FOR_TRB(ep_index); | |
e9df17eb | 3519 | u32 trb_stream_id = STREAM_ID_FOR_TRB(stream_id); |
ae636747 | 3520 | u32 type = TRB_TYPE(TRB_SET_DEQ); |
bf161e85 | 3521 | struct xhci_virt_ep *ep; |
ae636747 | 3522 | |
23e3be11 | 3523 | addr = xhci_trb_virt_to_dma(deq_seg, deq_ptr); |
c92bcfa7 | 3524 | if (addr == 0) { |
ae636747 | 3525 | xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n"); |
700e2052 GKH |
3526 | xhci_warn(xhci, "WARN deq seg = %p, deq pt = %p\n", |
3527 | deq_seg, deq_ptr); | |
c92bcfa7 SS |
3528 | return 0; |
3529 | } | |
bf161e85 SS |
3530 | ep = &xhci->devs[slot_id]->eps[ep_index]; |
3531 | if ((ep->ep_state & SET_DEQ_PENDING)) { | |
3532 | xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n"); | |
3533 | xhci_warn(xhci, "A Set TR Deq Ptr command is pending.\n"); | |
3534 | return 0; | |
3535 | } | |
3536 | ep->queued_deq_seg = deq_seg; | |
3537 | ep->queued_deq_ptr = deq_ptr; | |
8e595a5d | 3538 | return queue_command(xhci, lower_32_bits(addr) | cycle_state, |
e9df17eb | 3539 | upper_32_bits(addr), trb_stream_id, |
913a8a34 | 3540 | trb_slot_id | trb_ep_index | type, false); |
ae636747 | 3541 | } |
a1587d97 SS |
3542 | |
3543 | int xhci_queue_reset_ep(struct xhci_hcd *xhci, int slot_id, | |
3544 | unsigned int ep_index) | |
3545 | { | |
3546 | u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id); | |
3547 | u32 trb_ep_index = EP_ID_FOR_TRB(ep_index); | |
3548 | u32 type = TRB_TYPE(TRB_RESET_EP); | |
3549 | ||
913a8a34 SS |
3550 | return queue_command(xhci, 0, 0, 0, trb_slot_id | trb_ep_index | type, |
3551 | false); | |
a1587d97 | 3552 | } |