2 * xHCI host controller driver
4 * Copyright (C) 2008 Intel Corp.
7 * Some code borrowed from the Linux EHCI driver.
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.
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
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.
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.
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.
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.
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
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.
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.
67 #include <linux/scatterlist.h>
68 #include <linux/slab.h>
70 #include "xhci-trace.h"
73 * Returns zero if the TRB isn't in this segment, otherwise it returns the DMA
76 dma_addr_t
xhci_trb_virt_to_dma(struct xhci_segment
*seg
,
79 unsigned long segment_offset
;
81 if (!seg
|| !trb
|| trb
< seg
->trbs
)
84 segment_offset
= trb
- seg
->trbs
;
85 if (segment_offset
> TRBS_PER_SEGMENT
)
87 return seg
->dma
+ (segment_offset
* sizeof(*trb
));
90 /* Does this link TRB point to the first segment in a ring,
91 * or was the previous TRB the last TRB on the last segment in the ERST?
93 static bool last_trb_on_last_seg(struct xhci_hcd
*xhci
, struct xhci_ring
*ring
,
94 struct xhci_segment
*seg
, union xhci_trb
*trb
)
96 if (ring
== xhci
->event_ring
)
97 return (trb
== &seg
->trbs
[TRBS_PER_SEGMENT
]) &&
98 (seg
->next
== xhci
->event_ring
->first_seg
);
100 return le32_to_cpu(trb
->link
.control
) & LINK_TOGGLE
;
103 /* Is this TRB a link TRB or was the last TRB the last TRB in this event ring
104 * segment? I.e. would the updated event TRB pointer step off the end of the
107 static int last_trb(struct xhci_hcd
*xhci
, struct xhci_ring
*ring
,
108 struct xhci_segment
*seg
, union xhci_trb
*trb
)
110 if (ring
== xhci
->event_ring
)
111 return trb
== &seg
->trbs
[TRBS_PER_SEGMENT
];
113 return TRB_TYPE_LINK_LE32(trb
->link
.control
);
116 static int enqueue_is_link_trb(struct xhci_ring
*ring
)
118 struct xhci_link_trb
*link
= &ring
->enqueue
->link
;
119 return TRB_TYPE_LINK_LE32(link
->control
);
122 /* Updates trb to point to the next TRB in the ring, and updates seg if the next
123 * TRB is in a new segment. This does not skip over link TRBs, and it does not
124 * effect the ring dequeue or enqueue pointers.
126 static void next_trb(struct xhci_hcd
*xhci
,
127 struct xhci_ring
*ring
,
128 struct xhci_segment
**seg
,
129 union xhci_trb
**trb
)
131 if (last_trb(xhci
, ring
, *seg
, *trb
)) {
133 *trb
= ((*seg
)->trbs
);
140 * See Cycle bit rules. SW is the consumer for the event ring only.
141 * Don't make a ring full of link TRBs. That would be dumb and this would loop.
143 static void inc_deq(struct xhci_hcd
*xhci
, struct xhci_ring
*ring
)
148 * If this is not event ring, and the dequeue pointer
149 * is not on a link TRB, there is one more usable TRB
151 if (ring
->type
!= TYPE_EVENT
&&
152 !last_trb(xhci
, ring
, ring
->deq_seg
, ring
->dequeue
))
153 ring
->num_trbs_free
++;
157 * Update the dequeue pointer further if that was a link TRB or
158 * we're at the end of an event ring segment (which doesn't have
161 if (last_trb(xhci
, ring
, ring
->deq_seg
, ring
->dequeue
)) {
162 if (ring
->type
== TYPE_EVENT
&&
163 last_trb_on_last_seg(xhci
, ring
,
164 ring
->deq_seg
, ring
->dequeue
)) {
165 ring
->cycle_state
^= 1;
167 ring
->deq_seg
= ring
->deq_seg
->next
;
168 ring
->dequeue
= ring
->deq_seg
->trbs
;
172 } while (last_trb(xhci
, ring
, ring
->deq_seg
, ring
->dequeue
));
176 * See Cycle bit rules. SW is the consumer for the event ring only.
177 * Don't make a ring full of link TRBs. That would be dumb and this would loop.
179 * If we've just enqueued a TRB that is in the middle of a TD (meaning the
180 * chain bit is set), then set the chain bit in all the following link TRBs.
181 * If we've enqueued the last TRB in a TD, make sure the following link TRBs
182 * have their chain bit cleared (so that each Link TRB is a separate TD).
184 * Section 6.4.4.1 of the 0.95 spec says link TRBs cannot have the chain bit
185 * set, but other sections talk about dealing with the chain bit set. This was
186 * fixed in the 0.96 specification errata, but we have to assume that all 0.95
187 * xHCI hardware can't handle the chain bit being cleared on a link TRB.
189 * @more_trbs_coming: Will you enqueue more TRBs before calling
190 * prepare_transfer()?
192 static void inc_enq(struct xhci_hcd
*xhci
, struct xhci_ring
*ring
,
193 bool more_trbs_coming
)
196 union xhci_trb
*next
;
198 chain
= le32_to_cpu(ring
->enqueue
->generic
.field
[3]) & TRB_CHAIN
;
199 /* If this is not event ring, there is one less usable TRB */
200 if (ring
->type
!= TYPE_EVENT
&&
201 !last_trb(xhci
, ring
, ring
->enq_seg
, ring
->enqueue
))
202 ring
->num_trbs_free
--;
203 next
= ++(ring
->enqueue
);
206 /* Update the dequeue pointer further if that was a link TRB or we're at
207 * the end of an event ring segment (which doesn't have link TRBS)
209 while (last_trb(xhci
, ring
, ring
->enq_seg
, next
)) {
210 if (ring
->type
!= TYPE_EVENT
) {
212 * If the caller doesn't plan on enqueueing more
213 * TDs before ringing the doorbell, then we
214 * don't want to give the link TRB to the
215 * hardware just yet. We'll give the link TRB
216 * back in prepare_ring() just before we enqueue
217 * the TD at the top of the ring.
219 if (!chain
&& !more_trbs_coming
)
222 /* If we're not dealing with 0.95 hardware or
223 * isoc rings on AMD 0.96 host,
224 * carry over the chain bit of the previous TRB
225 * (which may mean the chain bit is cleared).
227 if (!(ring
->type
== TYPE_ISOC
&&
228 (xhci
->quirks
& XHCI_AMD_0x96_HOST
))
229 && !xhci_link_trb_quirk(xhci
)) {
230 next
->link
.control
&=
231 cpu_to_le32(~TRB_CHAIN
);
232 next
->link
.control
|=
235 /* Give this link TRB to the hardware */
237 next
->link
.control
^= cpu_to_le32(TRB_CYCLE
);
239 /* Toggle the cycle bit after the last ring segment. */
240 if (last_trb_on_last_seg(xhci
, ring
, ring
->enq_seg
, next
)) {
241 ring
->cycle_state
= (ring
->cycle_state
? 0 : 1);
244 ring
->enq_seg
= ring
->enq_seg
->next
;
245 ring
->enqueue
= ring
->enq_seg
->trbs
;
246 next
= ring
->enqueue
;
251 * Check to see if there's room to enqueue num_trbs on the ring and make sure
252 * enqueue pointer will not advance into dequeue segment. See rules above.
254 static inline int room_on_ring(struct xhci_hcd
*xhci
, struct xhci_ring
*ring
,
255 unsigned int num_trbs
)
257 int num_trbs_in_deq_seg
;
259 if (ring
->num_trbs_free
< num_trbs
)
262 if (ring
->type
!= TYPE_COMMAND
&& ring
->type
!= TYPE_EVENT
) {
263 num_trbs_in_deq_seg
= ring
->dequeue
- ring
->deq_seg
->trbs
;
264 if (ring
->num_trbs_free
< num_trbs
+ num_trbs_in_deq_seg
)
271 /* Ring the host controller doorbell after placing a command on the ring */
272 void xhci_ring_cmd_db(struct xhci_hcd
*xhci
)
274 if (!(xhci
->cmd_ring_state
& CMD_RING_STATE_RUNNING
))
277 xhci_dbg(xhci
, "// Ding dong!\n");
278 writel(DB_VALUE_HOST
, &xhci
->dba
->doorbell
[0]);
279 /* Flush PCI posted writes */
280 readl(&xhci
->dba
->doorbell
[0]);
283 static int xhci_abort_cmd_ring(struct xhci_hcd
*xhci
)
288 xhci_dbg(xhci
, "Abort command ring\n");
290 temp_64
= xhci_read_64(xhci
, &xhci
->op_regs
->cmd_ring
);
291 xhci
->cmd_ring_state
= CMD_RING_STATE_ABORTED
;
292 xhci_write_64(xhci
, temp_64
| CMD_RING_ABORT
,
293 &xhci
->op_regs
->cmd_ring
);
295 /* Section 4.6.1.2 of xHCI 1.0 spec says software should
296 * time the completion od all xHCI commands, including
297 * the Command Abort operation. If software doesn't see
298 * CRR negated in a timely manner (e.g. longer than 5
299 * seconds), then it should assume that the there are
300 * larger problems with the xHC and assert HCRST.
302 ret
= xhci_handshake(&xhci
->op_regs
->cmd_ring
,
303 CMD_RING_RUNNING
, 0, 5 * 1000 * 1000);
305 xhci_err(xhci
, "Stopped the command ring failed, "
306 "maybe the host is dead\n");
307 xhci
->xhc_state
|= XHCI_STATE_DYING
;
316 void xhci_ring_ep_doorbell(struct xhci_hcd
*xhci
,
317 unsigned int slot_id
,
318 unsigned int ep_index
,
319 unsigned int stream_id
)
321 __le32 __iomem
*db_addr
= &xhci
->dba
->doorbell
[slot_id
];
322 struct xhci_virt_ep
*ep
= &xhci
->devs
[slot_id
]->eps
[ep_index
];
323 unsigned int ep_state
= ep
->ep_state
;
325 /* Don't ring the doorbell for this endpoint if there are pending
326 * cancellations because we don't want to interrupt processing.
327 * We don't want to restart any stream rings if there's a set dequeue
328 * pointer command pending because the device can choose to start any
329 * stream once the endpoint is on the HW schedule.
331 if ((ep_state
& EP_HALT_PENDING
) || (ep_state
& SET_DEQ_PENDING
) ||
332 (ep_state
& EP_HALTED
))
334 writel(DB_VALUE(ep_index
, stream_id
), db_addr
);
335 /* The CPU has better things to do at this point than wait for a
336 * write-posting flush. It'll get there soon enough.
340 /* Ring the doorbell for any rings with pending URBs */
341 static void ring_doorbell_for_active_rings(struct xhci_hcd
*xhci
,
342 unsigned int slot_id
,
343 unsigned int ep_index
)
345 unsigned int stream_id
;
346 struct xhci_virt_ep
*ep
;
348 ep
= &xhci
->devs
[slot_id
]->eps
[ep_index
];
350 /* A ring has pending URBs if its TD list is not empty */
351 if (!(ep
->ep_state
& EP_HAS_STREAMS
)) {
352 if (ep
->ring
&& !(list_empty(&ep
->ring
->td_list
)))
353 xhci_ring_ep_doorbell(xhci
, slot_id
, ep_index
, 0);
357 for (stream_id
= 1; stream_id
< ep
->stream_info
->num_streams
;
359 struct xhci_stream_info
*stream_info
= ep
->stream_info
;
360 if (!list_empty(&stream_info
->stream_rings
[stream_id
]->td_list
))
361 xhci_ring_ep_doorbell(xhci
, slot_id
, ep_index
,
366 static struct xhci_ring
*xhci_triad_to_transfer_ring(struct xhci_hcd
*xhci
,
367 unsigned int slot_id
, unsigned int ep_index
,
368 unsigned int stream_id
)
370 struct xhci_virt_ep
*ep
;
372 ep
= &xhci
->devs
[slot_id
]->eps
[ep_index
];
373 /* Common case: no streams */
374 if (!(ep
->ep_state
& EP_HAS_STREAMS
))
377 if (stream_id
== 0) {
379 "WARN: Slot ID %u, ep index %u has streams, "
380 "but URB has no stream ID.\n",
385 if (stream_id
< ep
->stream_info
->num_streams
)
386 return ep
->stream_info
->stream_rings
[stream_id
];
389 "WARN: Slot ID %u, ep index %u has "
390 "stream IDs 1 to %u allocated, "
391 "but stream ID %u is requested.\n",
393 ep
->stream_info
->num_streams
- 1,
398 /* Get the right ring for the given URB.
399 * If the endpoint supports streams, boundary check the URB's stream ID.
400 * If the endpoint doesn't support streams, return the singular endpoint ring.
402 static struct xhci_ring
*xhci_urb_to_transfer_ring(struct xhci_hcd
*xhci
,
405 return xhci_triad_to_transfer_ring(xhci
, urb
->dev
->slot_id
,
406 xhci_get_endpoint_index(&urb
->ep
->desc
), urb
->stream_id
);
410 * Move the xHC's endpoint ring dequeue pointer past cur_td.
411 * Record the new state of the xHC's endpoint ring dequeue segment,
412 * dequeue pointer, and new consumer cycle state in state.
413 * Update our internal representation of the ring's dequeue pointer.
415 * We do this in three jumps:
416 * - First we update our new ring state to be the same as when the xHC stopped.
417 * - Then we traverse the ring to find the segment that contains
418 * the last TRB in the TD. We toggle the xHC's new cycle state when we pass
419 * any link TRBs with the toggle cycle bit set.
420 * - Finally we move the dequeue state one TRB further, toggling the cycle bit
421 * if we've moved it past a link TRB with the toggle cycle bit set.
423 * Some of the uses of xhci_generic_trb are grotty, but if they're done
424 * with correct __le32 accesses they should work fine. Only users of this are
427 void xhci_find_new_dequeue_state(struct xhci_hcd
*xhci
,
428 unsigned int slot_id
, unsigned int ep_index
,
429 unsigned int stream_id
, struct xhci_td
*cur_td
,
430 struct xhci_dequeue_state
*state
)
432 struct xhci_virt_device
*dev
= xhci
->devs
[slot_id
];
433 struct xhci_virt_ep
*ep
= &dev
->eps
[ep_index
];
434 struct xhci_ring
*ep_ring
;
435 struct xhci_segment
*new_seg
;
436 union xhci_trb
*new_deq
;
439 bool cycle_found
= false;
440 bool td_last_trb_found
= false;
442 ep_ring
= xhci_triad_to_transfer_ring(xhci
, slot_id
,
443 ep_index
, stream_id
);
445 xhci_warn(xhci
, "WARN can't find new dequeue state "
446 "for invalid stream ID %u.\n",
451 /* Dig out the cycle state saved by the xHC during the stop ep cmd */
452 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
453 "Finding endpoint context");
454 /* 4.6.9 the css flag is written to the stream context for streams */
455 if (ep
->ep_state
& EP_HAS_STREAMS
) {
456 struct xhci_stream_ctx
*ctx
=
457 &ep
->stream_info
->stream_ctx_array
[stream_id
];
458 hw_dequeue
= le64_to_cpu(ctx
->stream_ring
);
460 struct xhci_ep_ctx
*ep_ctx
461 = xhci_get_ep_ctx(xhci
, dev
->out_ctx
, ep_index
);
462 hw_dequeue
= le64_to_cpu(ep_ctx
->deq
);
465 new_seg
= ep_ring
->deq_seg
;
466 new_deq
= ep_ring
->dequeue
;
467 state
->new_cycle_state
= hw_dequeue
& 0x1;
470 * We want to find the pointer, segment and cycle state of the new trb
471 * (the one after current TD's last_trb). We know the cycle state at
472 * hw_dequeue, so walk the ring until both hw_dequeue and last_trb are
476 if (!cycle_found
&& xhci_trb_virt_to_dma(new_seg
, new_deq
)
477 == (dma_addr_t
)(hw_dequeue
& ~0xf)) {
479 if (td_last_trb_found
)
482 if (new_deq
== cur_td
->last_trb
)
483 td_last_trb_found
= true;
486 TRB_TYPE_LINK_LE32(new_deq
->generic
.field
[3]) &&
487 new_deq
->generic
.field
[3] & cpu_to_le32(LINK_TOGGLE
))
488 state
->new_cycle_state
^= 0x1;
490 next_trb(xhci
, ep_ring
, &new_seg
, &new_deq
);
492 /* Search wrapped around, bail out */
493 if (new_deq
== ep
->ring
->dequeue
) {
494 xhci_err(xhci
, "Error: Failed finding new dequeue state\n");
495 state
->new_deq_seg
= NULL
;
496 state
->new_deq_ptr
= NULL
;
500 } while (!cycle_found
|| !td_last_trb_found
);
502 state
->new_deq_seg
= new_seg
;
503 state
->new_deq_ptr
= new_deq
;
505 /* Don't update the ring cycle state for the producer (us). */
506 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
507 "Cycle state = 0x%x", state
->new_cycle_state
);
509 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
510 "New dequeue segment = %p (virtual)",
512 addr
= xhci_trb_virt_to_dma(state
->new_deq_seg
, state
->new_deq_ptr
);
513 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
514 "New dequeue pointer = 0x%llx (DMA)",
515 (unsigned long long) addr
);
518 /* flip_cycle means flip the cycle bit of all but the first and last TRB.
519 * (The last TRB actually points to the ring enqueue pointer, which is not part
520 * of this TD.) This is used to remove partially enqueued isoc TDs from a ring.
522 static void td_to_noop(struct xhci_hcd
*xhci
, struct xhci_ring
*ep_ring
,
523 struct xhci_td
*cur_td
, bool flip_cycle
)
525 struct xhci_segment
*cur_seg
;
526 union xhci_trb
*cur_trb
;
528 for (cur_seg
= cur_td
->start_seg
, cur_trb
= cur_td
->first_trb
;
530 next_trb(xhci
, ep_ring
, &cur_seg
, &cur_trb
)) {
531 if (TRB_TYPE_LINK_LE32(cur_trb
->generic
.field
[3])) {
532 /* Unchain any chained Link TRBs, but
533 * leave the pointers intact.
535 cur_trb
->generic
.field
[3] &= cpu_to_le32(~TRB_CHAIN
);
536 /* Flip the cycle bit (link TRBs can't be the first
540 cur_trb
->generic
.field
[3] ^=
541 cpu_to_le32(TRB_CYCLE
);
542 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
543 "Cancel (unchain) link TRB");
544 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
545 "Address = %p (0x%llx dma); "
546 "in seg %p (0x%llx dma)",
548 (unsigned long long)xhci_trb_virt_to_dma(cur_seg
, cur_trb
),
550 (unsigned long long)cur_seg
->dma
);
552 cur_trb
->generic
.field
[0] = 0;
553 cur_trb
->generic
.field
[1] = 0;
554 cur_trb
->generic
.field
[2] = 0;
555 /* Preserve only the cycle bit of this TRB */
556 cur_trb
->generic
.field
[3] &= cpu_to_le32(TRB_CYCLE
);
557 /* Flip the cycle bit except on the first or last TRB */
558 if (flip_cycle
&& cur_trb
!= cur_td
->first_trb
&&
559 cur_trb
!= cur_td
->last_trb
)
560 cur_trb
->generic
.field
[3] ^=
561 cpu_to_le32(TRB_CYCLE
);
562 cur_trb
->generic
.field
[3] |= cpu_to_le32(
563 TRB_TYPE(TRB_TR_NOOP
));
564 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
565 "TRB to noop at offset 0x%llx",
567 xhci_trb_virt_to_dma(cur_seg
, cur_trb
));
569 if (cur_trb
== cur_td
->last_trb
)
574 static void xhci_stop_watchdog_timer_in_irq(struct xhci_hcd
*xhci
,
575 struct xhci_virt_ep
*ep
)
577 ep
->ep_state
&= ~EP_HALT_PENDING
;
578 /* Can't del_timer_sync in interrupt, so we attempt to cancel. If the
579 * timer is running on another CPU, we don't decrement stop_cmds_pending
580 * (since we didn't successfully stop the watchdog timer).
582 if (del_timer(&ep
->stop_cmd_timer
))
583 ep
->stop_cmds_pending
--;
586 /* Must be called with xhci->lock held in interrupt context */
587 static void xhci_giveback_urb_in_irq(struct xhci_hcd
*xhci
,
588 struct xhci_td
*cur_td
, int status
)
592 struct urb_priv
*urb_priv
;
595 urb_priv
= urb
->hcpriv
;
597 hcd
= bus_to_hcd(urb
->dev
->bus
);
599 /* Only giveback urb when this is the last td in urb */
600 if (urb_priv
->td_cnt
== urb_priv
->length
) {
601 if (usb_pipetype(urb
->pipe
) == PIPE_ISOCHRONOUS
) {
602 xhci_to_hcd(xhci
)->self
.bandwidth_isoc_reqs
--;
603 if (xhci_to_hcd(xhci
)->self
.bandwidth_isoc_reqs
== 0) {
604 if (xhci
->quirks
& XHCI_AMD_PLL_FIX
)
605 usb_amd_quirk_pll_enable();
608 usb_hcd_unlink_urb_from_ep(hcd
, urb
);
610 spin_unlock(&xhci
->lock
);
611 usb_hcd_giveback_urb(hcd
, urb
, status
);
612 xhci_urb_free_priv(urb_priv
);
613 spin_lock(&xhci
->lock
);
618 * When we get a command completion for a Stop Endpoint Command, we need to
619 * unlink any cancelled TDs from the ring. There are two ways to do that:
621 * 1. If the HW was in the middle of processing the TD that needs to be
622 * cancelled, then we must move the ring's dequeue pointer past the last TRB
623 * in the TD with a Set Dequeue Pointer Command.
624 * 2. Otherwise, we turn all the TRBs in the TD into No-op TRBs (with the chain
625 * bit cleared) so that the HW will skip over them.
627 static void xhci_handle_cmd_stop_ep(struct xhci_hcd
*xhci
, int slot_id
,
628 union xhci_trb
*trb
, struct xhci_event_cmd
*event
)
630 unsigned int ep_index
;
631 struct xhci_ring
*ep_ring
;
632 struct xhci_virt_ep
*ep
;
633 struct list_head
*entry
;
634 struct xhci_td
*cur_td
= NULL
;
635 struct xhci_td
*last_unlinked_td
;
637 struct xhci_dequeue_state deq_state
;
639 if (unlikely(TRB_TO_SUSPEND_PORT(le32_to_cpu(trb
->generic
.field
[3])))) {
640 if (!xhci
->devs
[slot_id
])
641 xhci_warn(xhci
, "Stop endpoint command "
642 "completion for disabled slot %u\n",
647 memset(&deq_state
, 0, sizeof(deq_state
));
648 ep_index
= TRB_TO_EP_INDEX(le32_to_cpu(trb
->generic
.field
[3]));
649 ep
= &xhci
->devs
[slot_id
]->eps
[ep_index
];
651 if (list_empty(&ep
->cancelled_td_list
)) {
652 xhci_stop_watchdog_timer_in_irq(xhci
, ep
);
653 ep
->stopped_td
= NULL
;
654 ring_doorbell_for_active_rings(xhci
, slot_id
, ep_index
);
658 /* Fix up the ep ring first, so HW stops executing cancelled TDs.
659 * We have the xHCI lock, so nothing can modify this list until we drop
660 * it. We're also in the event handler, so we can't get re-interrupted
661 * if another Stop Endpoint command completes
663 list_for_each(entry
, &ep
->cancelled_td_list
) {
664 cur_td
= list_entry(entry
, struct xhci_td
, cancelled_td_list
);
665 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
666 "Removing canceled TD starting at 0x%llx (dma).",
667 (unsigned long long)xhci_trb_virt_to_dma(
668 cur_td
->start_seg
, cur_td
->first_trb
));
669 ep_ring
= xhci_urb_to_transfer_ring(xhci
, cur_td
->urb
);
671 /* This shouldn't happen unless a driver is mucking
672 * with the stream ID after submission. This will
673 * leave the TD on the hardware ring, and the hardware
674 * will try to execute it, and may access a buffer
675 * that has already been freed. In the best case, the
676 * hardware will execute it, and the event handler will
677 * ignore the completion event for that TD, since it was
678 * removed from the td_list for that endpoint. In
679 * short, don't muck with the stream ID after
682 xhci_warn(xhci
, "WARN Cancelled URB %p "
683 "has invalid stream ID %u.\n",
685 cur_td
->urb
->stream_id
);
686 goto remove_finished_td
;
689 * If we stopped on the TD we need to cancel, then we have to
690 * move the xHC endpoint ring dequeue pointer past this TD.
692 if (cur_td
== ep
->stopped_td
)
693 xhci_find_new_dequeue_state(xhci
, slot_id
, ep_index
,
694 cur_td
->urb
->stream_id
,
697 td_to_noop(xhci
, ep_ring
, cur_td
, false);
700 * The event handler won't see a completion for this TD anymore,
701 * so remove it from the endpoint ring's TD list. Keep it in
702 * the cancelled TD list for URB completion later.
704 list_del_init(&cur_td
->td_list
);
706 last_unlinked_td
= cur_td
;
707 xhci_stop_watchdog_timer_in_irq(xhci
, ep
);
709 /* If necessary, queue a Set Transfer Ring Dequeue Pointer command */
710 if (deq_state
.new_deq_ptr
&& deq_state
.new_deq_seg
) {
711 xhci_queue_new_dequeue_state(xhci
, slot_id
, ep_index
,
712 ep
->stopped_td
->urb
->stream_id
, &deq_state
);
713 xhci_ring_cmd_db(xhci
);
715 /* Otherwise ring the doorbell(s) to restart queued transfers */
716 ring_doorbell_for_active_rings(xhci
, slot_id
, ep_index
);
719 ep
->stopped_td
= NULL
;
722 * Drop the lock and complete the URBs in the cancelled TD list.
723 * New TDs to be cancelled might be added to the end of the list before
724 * we can complete all the URBs for the TDs we already unlinked.
725 * So stop when we've completed the URB for the last TD we unlinked.
728 cur_td
= list_entry(ep
->cancelled_td_list
.next
,
729 struct xhci_td
, cancelled_td_list
);
730 list_del_init(&cur_td
->cancelled_td_list
);
732 /* Clean up the cancelled URB */
733 /* Doesn't matter what we pass for status, since the core will
734 * just overwrite it (because the URB has been unlinked).
736 xhci_giveback_urb_in_irq(xhci
, cur_td
, 0);
738 /* Stop processing the cancelled list if the watchdog timer is
741 if (xhci
->xhc_state
& XHCI_STATE_DYING
)
743 } while (cur_td
!= last_unlinked_td
);
745 /* Return to the event handler with xhci->lock re-acquired */
748 static void xhci_kill_ring_urbs(struct xhci_hcd
*xhci
, struct xhci_ring
*ring
)
750 struct xhci_td
*cur_td
;
752 while (!list_empty(&ring
->td_list
)) {
753 cur_td
= list_first_entry(&ring
->td_list
,
754 struct xhci_td
, td_list
);
755 list_del_init(&cur_td
->td_list
);
756 if (!list_empty(&cur_td
->cancelled_td_list
))
757 list_del_init(&cur_td
->cancelled_td_list
);
758 xhci_giveback_urb_in_irq(xhci
, cur_td
, -ESHUTDOWN
);
762 static void xhci_kill_endpoint_urbs(struct xhci_hcd
*xhci
,
763 int slot_id
, int ep_index
)
765 struct xhci_td
*cur_td
;
766 struct xhci_virt_ep
*ep
;
767 struct xhci_ring
*ring
;
769 ep
= &xhci
->devs
[slot_id
]->eps
[ep_index
];
770 if ((ep
->ep_state
& EP_HAS_STREAMS
) ||
771 (ep
->ep_state
& EP_GETTING_NO_STREAMS
)) {
774 for (stream_id
= 0; stream_id
< ep
->stream_info
->num_streams
;
776 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
777 "Killing URBs for slot ID %u, ep index %u, stream %u",
778 slot_id
, ep_index
, stream_id
+ 1);
779 xhci_kill_ring_urbs(xhci
,
780 ep
->stream_info
->stream_rings
[stream_id
]);
786 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
787 "Killing URBs for slot ID %u, ep index %u",
789 xhci_kill_ring_urbs(xhci
, ring
);
791 while (!list_empty(&ep
->cancelled_td_list
)) {
792 cur_td
= list_first_entry(&ep
->cancelled_td_list
,
793 struct xhci_td
, cancelled_td_list
);
794 list_del_init(&cur_td
->cancelled_td_list
);
795 xhci_giveback_urb_in_irq(xhci
, cur_td
, -ESHUTDOWN
);
799 /* Watchdog timer function for when a stop endpoint command fails to complete.
800 * In this case, we assume the host controller is broken or dying or dead. The
801 * host may still be completing some other events, so we have to be careful to
802 * let the event ring handler and the URB dequeueing/enqueueing functions know
803 * through xhci->state.
805 * The timer may also fire if the host takes a very long time to respond to the
806 * command, and the stop endpoint command completion handler cannot delete the
807 * timer before the timer function is called. Another endpoint cancellation may
808 * sneak in before the timer function can grab the lock, and that may queue
809 * another stop endpoint command and add the timer back. So we cannot use a
810 * simple flag to say whether there is a pending stop endpoint command for a
811 * particular endpoint.
813 * Instead we use a combination of that flag and a counter for the number of
814 * pending stop endpoint commands. If the timer is the tail end of the last
815 * stop endpoint command, and the endpoint's command is still pending, we assume
818 void xhci_stop_endpoint_command_watchdog(unsigned long arg
)
820 struct xhci_hcd
*xhci
;
821 struct xhci_virt_ep
*ep
;
825 ep
= (struct xhci_virt_ep
*) arg
;
828 spin_lock_irqsave(&xhci
->lock
, flags
);
830 ep
->stop_cmds_pending
--;
831 if (xhci
->xhc_state
& XHCI_STATE_DYING
) {
832 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
833 "Stop EP timer ran, but another timer marked "
834 "xHCI as DYING, exiting.");
835 spin_unlock_irqrestore(&xhci
->lock
, flags
);
838 if (!(ep
->stop_cmds_pending
== 0 && (ep
->ep_state
& EP_HALT_PENDING
))) {
839 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
840 "Stop EP timer ran, but no command pending, "
842 spin_unlock_irqrestore(&xhci
->lock
, flags
);
846 xhci_warn(xhci
, "xHCI host not responding to stop endpoint command.\n");
847 xhci_warn(xhci
, "Assuming host is dying, halting host.\n");
848 /* Oops, HC is dead or dying or at least not responding to the stop
851 xhci
->xhc_state
|= XHCI_STATE_DYING
;
852 /* Disable interrupts from the host controller and start halting it */
854 spin_unlock_irqrestore(&xhci
->lock
, flags
);
856 ret
= xhci_halt(xhci
);
858 spin_lock_irqsave(&xhci
->lock
, flags
);
860 /* This is bad; the host is not responding to commands and it's
861 * not allowing itself to be halted. At least interrupts are
862 * disabled. If we call usb_hc_died(), it will attempt to
863 * disconnect all device drivers under this host. Those
864 * disconnect() methods will wait for all URBs to be unlinked,
865 * so we must complete them.
867 xhci_warn(xhci
, "Non-responsive xHCI host is not halting.\n");
868 xhci_warn(xhci
, "Completing active URBs anyway.\n");
869 /* We could turn all TDs on the rings to no-ops. This won't
870 * help if the host has cached part of the ring, and is slow if
871 * we want to preserve the cycle bit. Skip it and hope the host
872 * doesn't touch the memory.
875 for (i
= 0; i
< MAX_HC_SLOTS
; i
++) {
878 for (j
= 0; j
< 31; j
++)
879 xhci_kill_endpoint_urbs(xhci
, i
, j
);
881 spin_unlock_irqrestore(&xhci
->lock
, flags
);
882 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
883 "Calling usb_hc_died()");
884 usb_hc_died(xhci_to_hcd(xhci
)->primary_hcd
);
885 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
886 "xHCI host controller is dead.");
890 static void update_ring_for_set_deq_completion(struct xhci_hcd
*xhci
,
891 struct xhci_virt_device
*dev
,
892 struct xhci_ring
*ep_ring
,
893 unsigned int ep_index
)
895 union xhci_trb
*dequeue_temp
;
896 int num_trbs_free_temp
;
899 num_trbs_free_temp
= ep_ring
->num_trbs_free
;
900 dequeue_temp
= ep_ring
->dequeue
;
902 /* If we get two back-to-back stalls, and the first stalled transfer
903 * ends just before a link TRB, the dequeue pointer will be left on
904 * the link TRB by the code in the while loop. So we have to update
905 * the dequeue pointer one segment further, or we'll jump off
906 * the segment into la-la-land.
908 if (last_trb(xhci
, ep_ring
, ep_ring
->deq_seg
, ep_ring
->dequeue
)) {
909 ep_ring
->deq_seg
= ep_ring
->deq_seg
->next
;
910 ep_ring
->dequeue
= ep_ring
->deq_seg
->trbs
;
913 while (ep_ring
->dequeue
!= dev
->eps
[ep_index
].queued_deq_ptr
) {
914 /* We have more usable TRBs */
915 ep_ring
->num_trbs_free
++;
917 if (last_trb(xhci
, ep_ring
, ep_ring
->deq_seg
,
919 if (ep_ring
->dequeue
==
920 dev
->eps
[ep_index
].queued_deq_ptr
)
922 ep_ring
->deq_seg
= ep_ring
->deq_seg
->next
;
923 ep_ring
->dequeue
= ep_ring
->deq_seg
->trbs
;
925 if (ep_ring
->dequeue
== dequeue_temp
) {
932 xhci_dbg(xhci
, "Unable to find new dequeue pointer\n");
933 ep_ring
->num_trbs_free
= num_trbs_free_temp
;
938 * When we get a completion for a Set Transfer Ring Dequeue Pointer command,
939 * we need to clear the set deq pending flag in the endpoint ring state, so that
940 * the TD queueing code can ring the doorbell again. We also need to ring the
941 * endpoint doorbell to restart the ring, but only if there aren't more
942 * cancellations pending.
944 static void xhci_handle_cmd_set_deq(struct xhci_hcd
*xhci
, int slot_id
,
945 union xhci_trb
*trb
, u32 cmd_comp_code
)
947 unsigned int ep_index
;
948 unsigned int stream_id
;
949 struct xhci_ring
*ep_ring
;
950 struct xhci_virt_device
*dev
;
951 struct xhci_virt_ep
*ep
;
952 struct xhci_ep_ctx
*ep_ctx
;
953 struct xhci_slot_ctx
*slot_ctx
;
955 ep_index
= TRB_TO_EP_INDEX(le32_to_cpu(trb
->generic
.field
[3]));
956 stream_id
= TRB_TO_STREAM_ID(le32_to_cpu(trb
->generic
.field
[2]));
957 dev
= xhci
->devs
[slot_id
];
958 ep
= &dev
->eps
[ep_index
];
960 ep_ring
= xhci_stream_id_to_ring(dev
, ep_index
, stream_id
);
962 xhci_warn(xhci
, "WARN Set TR deq ptr command for freed stream ID %u\n",
964 /* XXX: Harmless??? */
968 ep_ctx
= xhci_get_ep_ctx(xhci
, dev
->out_ctx
, ep_index
);
969 slot_ctx
= xhci_get_slot_ctx(xhci
, dev
->out_ctx
);
971 if (cmd_comp_code
!= COMP_SUCCESS
) {
972 unsigned int ep_state
;
973 unsigned int slot_state
;
975 switch (cmd_comp_code
) {
977 xhci_warn(xhci
, "WARN Set TR Deq Ptr cmd invalid because of stream ID configuration\n");
980 xhci_warn(xhci
, "WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state.\n");
981 ep_state
= le32_to_cpu(ep_ctx
->ep_info
);
982 ep_state
&= EP_STATE_MASK
;
983 slot_state
= le32_to_cpu(slot_ctx
->dev_state
);
984 slot_state
= GET_SLOT_STATE(slot_state
);
985 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
986 "Slot state = %u, EP state = %u",
987 slot_state
, ep_state
);
990 xhci_warn(xhci
, "WARN Set TR Deq Ptr cmd failed because slot %u was not enabled.\n",
994 xhci_warn(xhci
, "WARN Set TR Deq Ptr cmd with unknown completion code of %u.\n",
998 /* OK what do we do now? The endpoint state is hosed, and we
999 * should never get to this point if the synchronization between
1000 * queueing, and endpoint state are correct. This might happen
1001 * if the device gets disconnected after we've finished
1002 * cancelling URBs, which might not be an error...
1006 /* 4.6.10 deq ptr is written to the stream ctx for streams */
1007 if (ep
->ep_state
& EP_HAS_STREAMS
) {
1008 struct xhci_stream_ctx
*ctx
=
1009 &ep
->stream_info
->stream_ctx_array
[stream_id
];
1010 deq
= le64_to_cpu(ctx
->stream_ring
) & SCTX_DEQ_MASK
;
1012 deq
= le64_to_cpu(ep_ctx
->deq
) & ~EP_CTX_CYCLE_MASK
;
1014 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
1015 "Successful Set TR Deq Ptr cmd, deq = @%08llx", deq
);
1016 if (xhci_trb_virt_to_dma(ep
->queued_deq_seg
,
1017 ep
->queued_deq_ptr
) == deq
) {
1018 /* Update the ring's dequeue segment and dequeue pointer
1019 * to reflect the new position.
1021 update_ring_for_set_deq_completion(xhci
, dev
,
1024 xhci_warn(xhci
, "Mismatch between completed Set TR Deq Ptr command & xHCI internal state.\n");
1025 xhci_warn(xhci
, "ep deq seg = %p, deq ptr = %p\n",
1026 ep
->queued_deq_seg
, ep
->queued_deq_ptr
);
1031 dev
->eps
[ep_index
].ep_state
&= ~SET_DEQ_PENDING
;
1032 dev
->eps
[ep_index
].queued_deq_seg
= NULL
;
1033 dev
->eps
[ep_index
].queued_deq_ptr
= NULL
;
1034 /* Restart any rings with pending URBs */
1035 ring_doorbell_for_active_rings(xhci
, slot_id
, ep_index
);
1038 static void xhci_handle_cmd_reset_ep(struct xhci_hcd
*xhci
, int slot_id
,
1039 union xhci_trb
*trb
, u32 cmd_comp_code
)
1041 unsigned int ep_index
;
1043 ep_index
= TRB_TO_EP_INDEX(le32_to_cpu(trb
->generic
.field
[3]));
1044 /* This command will only fail if the endpoint wasn't halted,
1045 * but we don't care.
1047 xhci_dbg_trace(xhci
, trace_xhci_dbg_reset_ep
,
1048 "Ignoring reset ep completion code of %u", cmd_comp_code
);
1050 /* HW with the reset endpoint quirk needs to have a configure endpoint
1051 * command complete before the endpoint can be used. Queue that here
1052 * because the HW can't handle two commands being queued in a row.
1054 if (xhci
->quirks
& XHCI_RESET_EP_QUIRK
) {
1055 struct xhci_command
*command
;
1056 command
= xhci_alloc_command(xhci
, false, false, GFP_ATOMIC
);
1058 xhci_warn(xhci
, "WARN Cannot submit cfg ep: ENOMEM\n");
1061 xhci_dbg_trace(xhci
, trace_xhci_dbg_quirks
,
1062 "Queueing configure endpoint command");
1063 xhci_queue_configure_endpoint(xhci
, command
,
1064 xhci
->devs
[slot_id
]->in_ctx
->dma
, slot_id
,
1066 xhci_ring_cmd_db(xhci
);
1068 /* Clear our internal halted state */
1069 xhci
->devs
[slot_id
]->eps
[ep_index
].ep_state
&= ~EP_HALTED
;
1073 static void xhci_handle_cmd_enable_slot(struct xhci_hcd
*xhci
, int slot_id
,
1076 if (cmd_comp_code
== COMP_SUCCESS
)
1077 xhci
->slot_id
= slot_id
;
1082 static void xhci_handle_cmd_disable_slot(struct xhci_hcd
*xhci
, int slot_id
)
1084 struct xhci_virt_device
*virt_dev
;
1086 virt_dev
= xhci
->devs
[slot_id
];
1089 if (xhci
->quirks
& XHCI_EP_LIMIT_QUIRK
)
1090 /* Delete default control endpoint resources */
1091 xhci_free_device_endpoint_resources(xhci
, virt_dev
, true);
1092 xhci_free_virt_device(xhci
, slot_id
);
1095 static void xhci_handle_cmd_config_ep(struct xhci_hcd
*xhci
, int slot_id
,
1096 struct xhci_event_cmd
*event
, u32 cmd_comp_code
)
1098 struct xhci_virt_device
*virt_dev
;
1099 struct xhci_input_control_ctx
*ctrl_ctx
;
1100 unsigned int ep_index
;
1101 unsigned int ep_state
;
1102 u32 add_flags
, drop_flags
;
1105 * Configure endpoint commands can come from the USB core
1106 * configuration or alt setting changes, or because the HW
1107 * needed an extra configure endpoint command after a reset
1108 * endpoint command or streams were being configured.
1109 * If the command was for a halted endpoint, the xHCI driver
1110 * is not waiting on the configure endpoint command.
1112 virt_dev
= xhci
->devs
[slot_id
];
1113 ctrl_ctx
= xhci_get_input_control_ctx(virt_dev
->in_ctx
);
1115 xhci_warn(xhci
, "Could not get input context, bad type.\n");
1119 add_flags
= le32_to_cpu(ctrl_ctx
->add_flags
);
1120 drop_flags
= le32_to_cpu(ctrl_ctx
->drop_flags
);
1121 /* Input ctx add_flags are the endpoint index plus one */
1122 ep_index
= xhci_last_valid_endpoint(add_flags
) - 1;
1124 /* A usb_set_interface() call directly after clearing a halted
1125 * condition may race on this quirky hardware. Not worth
1126 * worrying about, since this is prototype hardware. Not sure
1127 * if this will work for streams, but streams support was
1128 * untested on this prototype.
1130 if (xhci
->quirks
& XHCI_RESET_EP_QUIRK
&&
1131 ep_index
!= (unsigned int) -1 &&
1132 add_flags
- SLOT_FLAG
== drop_flags
) {
1133 ep_state
= virt_dev
->eps
[ep_index
].ep_state
;
1134 if (!(ep_state
& EP_HALTED
))
1136 xhci_dbg_trace(xhci
, trace_xhci_dbg_quirks
,
1137 "Completed config ep cmd - "
1138 "last ep index = %d, state = %d",
1139 ep_index
, ep_state
);
1140 /* Clear internal halted state and restart ring(s) */
1141 virt_dev
->eps
[ep_index
].ep_state
&= ~EP_HALTED
;
1142 ring_doorbell_for_active_rings(xhci
, slot_id
, ep_index
);
1148 static void xhci_handle_cmd_reset_dev(struct xhci_hcd
*xhci
, int slot_id
,
1149 struct xhci_event_cmd
*event
)
1151 xhci_dbg(xhci
, "Completed reset device command.\n");
1152 if (!xhci
->devs
[slot_id
])
1153 xhci_warn(xhci
, "Reset device command completion "
1154 "for disabled slot %u\n", slot_id
);
1157 static void xhci_handle_cmd_nec_get_fw(struct xhci_hcd
*xhci
,
1158 struct xhci_event_cmd
*event
)
1160 if (!(xhci
->quirks
& XHCI_NEC_HOST
)) {
1161 xhci
->error_bitmask
|= 1 << 6;
1164 xhci_dbg_trace(xhci
, trace_xhci_dbg_quirks
,
1165 "NEC firmware version %2x.%02x",
1166 NEC_FW_MAJOR(le32_to_cpu(event
->status
)),
1167 NEC_FW_MINOR(le32_to_cpu(event
->status
)));
1170 static void xhci_complete_del_and_free_cmd(struct xhci_command
*cmd
, u32 status
)
1172 list_del(&cmd
->cmd_list
);
1174 if (cmd
->completion
) {
1175 cmd
->status
= status
;
1176 complete(cmd
->completion
);
1182 void xhci_cleanup_command_queue(struct xhci_hcd
*xhci
)
1184 struct xhci_command
*cur_cmd
, *tmp_cmd
;
1185 list_for_each_entry_safe(cur_cmd
, tmp_cmd
, &xhci
->cmd_list
, cmd_list
)
1186 xhci_complete_del_and_free_cmd(cur_cmd
, COMP_CMD_ABORT
);
1190 * Turn all commands on command ring with status set to "aborted" to no-op trbs.
1191 * If there are other commands waiting then restart the ring and kick the timer.
1192 * This must be called with command ring stopped and xhci->lock held.
1194 static void xhci_handle_stopped_cmd_ring(struct xhci_hcd
*xhci
,
1195 struct xhci_command
*cur_cmd
)
1197 struct xhci_command
*i_cmd
, *tmp_cmd
;
1200 /* Turn all aborted commands in list to no-ops, then restart */
1201 list_for_each_entry_safe(i_cmd
, tmp_cmd
, &xhci
->cmd_list
,
1204 if (i_cmd
->status
!= COMP_CMD_ABORT
)
1207 i_cmd
->status
= COMP_CMD_STOP
;
1209 xhci_dbg(xhci
, "Turn aborted command %p to no-op\n",
1210 i_cmd
->command_trb
);
1211 /* get cycle state from the original cmd trb */
1212 cycle_state
= le32_to_cpu(
1213 i_cmd
->command_trb
->generic
.field
[3]) & TRB_CYCLE
;
1214 /* modify the command trb to no-op command */
1215 i_cmd
->command_trb
->generic
.field
[0] = 0;
1216 i_cmd
->command_trb
->generic
.field
[1] = 0;
1217 i_cmd
->command_trb
->generic
.field
[2] = 0;
1218 i_cmd
->command_trb
->generic
.field
[3] = cpu_to_le32(
1219 TRB_TYPE(TRB_CMD_NOOP
) | cycle_state
);
1222 * caller waiting for completion is called when command
1223 * completion event is received for these no-op commands
1227 xhci
->cmd_ring_state
= CMD_RING_STATE_RUNNING
;
1229 /* ring command ring doorbell to restart the command ring */
1230 if ((xhci
->cmd_ring
->dequeue
!= xhci
->cmd_ring
->enqueue
) &&
1231 !(xhci
->xhc_state
& XHCI_STATE_DYING
)) {
1232 xhci
->current_cmd
= cur_cmd
;
1233 mod_timer(&xhci
->cmd_timer
, jiffies
+ XHCI_CMD_DEFAULT_TIMEOUT
);
1234 xhci_ring_cmd_db(xhci
);
1240 void xhci_handle_command_timeout(unsigned long data
)
1242 struct xhci_hcd
*xhci
;
1244 unsigned long flags
;
1246 struct xhci_command
*cur_cmd
= NULL
;
1247 xhci
= (struct xhci_hcd
*) data
;
1249 /* mark this command to be cancelled */
1250 spin_lock_irqsave(&xhci
->lock
, flags
);
1251 if (xhci
->current_cmd
) {
1252 cur_cmd
= xhci
->current_cmd
;
1253 cur_cmd
->status
= COMP_CMD_ABORT
;
1257 /* Make sure command ring is running before aborting it */
1258 hw_ring_state
= xhci_read_64(xhci
, &xhci
->op_regs
->cmd_ring
);
1259 if ((xhci
->cmd_ring_state
& CMD_RING_STATE_RUNNING
) &&
1260 (hw_ring_state
& CMD_RING_RUNNING
)) {
1262 spin_unlock_irqrestore(&xhci
->lock
, flags
);
1263 xhci_dbg(xhci
, "Command timeout\n");
1264 ret
= xhci_abort_cmd_ring(xhci
);
1265 if (unlikely(ret
== -ESHUTDOWN
)) {
1266 xhci_err(xhci
, "Abort command ring failed\n");
1267 xhci_cleanup_command_queue(xhci
);
1268 usb_hc_died(xhci_to_hcd(xhci
)->primary_hcd
);
1269 xhci_dbg(xhci
, "xHCI host controller is dead.\n");
1273 /* command timeout on stopped ring, ring can't be aborted */
1274 xhci_dbg(xhci
, "Command timeout on stopped ring\n");
1275 xhci_handle_stopped_cmd_ring(xhci
, xhci
->current_cmd
);
1276 spin_unlock_irqrestore(&xhci
->lock
, flags
);
1280 static void handle_cmd_completion(struct xhci_hcd
*xhci
,
1281 struct xhci_event_cmd
*event
)
1283 int slot_id
= TRB_TO_SLOT_ID(le32_to_cpu(event
->flags
));
1285 dma_addr_t cmd_dequeue_dma
;
1287 union xhci_trb
*cmd_trb
;
1288 struct xhci_command
*cmd
;
1291 cmd_dma
= le64_to_cpu(event
->cmd_trb
);
1292 cmd_trb
= xhci
->cmd_ring
->dequeue
;
1293 cmd_dequeue_dma
= xhci_trb_virt_to_dma(xhci
->cmd_ring
->deq_seg
,
1295 /* Is the command ring deq ptr out of sync with the deq seg ptr? */
1296 if (cmd_dequeue_dma
== 0) {
1297 xhci
->error_bitmask
|= 1 << 4;
1300 /* Does the DMA address match our internal dequeue pointer address? */
1301 if (cmd_dma
!= (u64
) cmd_dequeue_dma
) {
1302 xhci
->error_bitmask
|= 1 << 5;
1306 cmd
= list_entry(xhci
->cmd_list
.next
, struct xhci_command
, cmd_list
);
1308 if (cmd
->command_trb
!= xhci
->cmd_ring
->dequeue
) {
1310 "Command completion event does not match command\n");
1314 del_timer(&xhci
->cmd_timer
);
1316 trace_xhci_cmd_completion(cmd_trb
, (struct xhci_generic_trb
*) event
);
1318 cmd_comp_code
= GET_COMP_CODE(le32_to_cpu(event
->status
));
1320 /* If CMD ring stopped we own the trbs between enqueue and dequeue */
1321 if (cmd_comp_code
== COMP_CMD_STOP
) {
1322 xhci_handle_stopped_cmd_ring(xhci
, cmd
);
1326 * Host aborted the command ring, check if the current command was
1327 * supposed to be aborted, otherwise continue normally.
1328 * The command ring is stopped now, but the xHC will issue a Command
1329 * Ring Stopped event which will cause us to restart it.
1331 if (cmd_comp_code
== COMP_CMD_ABORT
) {
1332 xhci
->cmd_ring_state
= CMD_RING_STATE_STOPPED
;
1333 if (cmd
->status
== COMP_CMD_ABORT
)
1337 cmd_type
= TRB_FIELD_TO_TYPE(le32_to_cpu(cmd_trb
->generic
.field
[3]));
1339 case TRB_ENABLE_SLOT
:
1340 xhci_handle_cmd_enable_slot(xhci
, slot_id
, cmd_comp_code
);
1342 case TRB_DISABLE_SLOT
:
1343 xhci_handle_cmd_disable_slot(xhci
, slot_id
);
1346 if (!cmd
->completion
)
1347 xhci_handle_cmd_config_ep(xhci
, slot_id
, event
,
1350 case TRB_EVAL_CONTEXT
:
1355 WARN_ON(slot_id
!= TRB_TO_SLOT_ID(
1356 le32_to_cpu(cmd_trb
->generic
.field
[3])));
1357 xhci_handle_cmd_stop_ep(xhci
, slot_id
, cmd_trb
, event
);
1360 WARN_ON(slot_id
!= TRB_TO_SLOT_ID(
1361 le32_to_cpu(cmd_trb
->generic
.field
[3])));
1362 xhci_handle_cmd_set_deq(xhci
, slot_id
, cmd_trb
, cmd_comp_code
);
1365 /* Is this an aborted command turned to NO-OP? */
1366 if (cmd
->status
== COMP_CMD_STOP
)
1367 cmd_comp_code
= COMP_CMD_STOP
;
1370 WARN_ON(slot_id
!= TRB_TO_SLOT_ID(
1371 le32_to_cpu(cmd_trb
->generic
.field
[3])));
1372 xhci_handle_cmd_reset_ep(xhci
, slot_id
, cmd_trb
, cmd_comp_code
);
1375 /* SLOT_ID field in reset device cmd completion event TRB is 0.
1376 * Use the SLOT_ID from the command TRB instead (xhci 4.6.11)
1378 slot_id
= TRB_TO_SLOT_ID(
1379 le32_to_cpu(cmd_trb
->generic
.field
[3]));
1380 xhci_handle_cmd_reset_dev(xhci
, slot_id
, event
);
1382 case TRB_NEC_GET_FW
:
1383 xhci_handle_cmd_nec_get_fw(xhci
, event
);
1386 /* Skip over unknown commands on the event ring */
1387 xhci
->error_bitmask
|= 1 << 6;
1391 /* restart timer if this wasn't the last command */
1392 if (cmd
->cmd_list
.next
!= &xhci
->cmd_list
) {
1393 xhci
->current_cmd
= list_entry(cmd
->cmd_list
.next
,
1394 struct xhci_command
, cmd_list
);
1395 mod_timer(&xhci
->cmd_timer
, jiffies
+ XHCI_CMD_DEFAULT_TIMEOUT
);
1399 xhci_complete_del_and_free_cmd(cmd
, cmd_comp_code
);
1401 inc_deq(xhci
, xhci
->cmd_ring
);
1404 static void handle_vendor_event(struct xhci_hcd
*xhci
,
1405 union xhci_trb
*event
)
1409 trb_type
= TRB_FIELD_TO_TYPE(le32_to_cpu(event
->generic
.field
[3]));
1410 xhci_dbg(xhci
, "Vendor specific event TRB type = %u\n", trb_type
);
1411 if (trb_type
== TRB_NEC_CMD_COMP
&& (xhci
->quirks
& XHCI_NEC_HOST
))
1412 handle_cmd_completion(xhci
, &event
->event_cmd
);
1415 /* @port_id: the one-based port ID from the hardware (indexed from array of all
1416 * port registers -- USB 3.0 and USB 2.0).
1418 * Returns a zero-based port number, which is suitable for indexing into each of
1419 * the split roothubs' port arrays and bus state arrays.
1420 * Add one to it in order to call xhci_find_slot_id_by_port.
1422 static unsigned int find_faked_portnum_from_hw_portnum(struct usb_hcd
*hcd
,
1423 struct xhci_hcd
*xhci
, u32 port_id
)
1426 unsigned int num_similar_speed_ports
= 0;
1428 /* port_id from the hardware is 1-based, but port_array[], usb3_ports[],
1429 * and usb2_ports are 0-based indexes. Count the number of similar
1430 * speed ports, up to 1 port before this port.
1432 for (i
= 0; i
< (port_id
- 1); i
++) {
1433 u8 port_speed
= xhci
->port_array
[i
];
1436 * Skip ports that don't have known speeds, or have duplicate
1437 * Extended Capabilities port speed entries.
1439 if (port_speed
== 0 || port_speed
== DUPLICATE_ENTRY
)
1443 * USB 3.0 ports are always under a USB 3.0 hub. USB 2.0 and
1444 * 1.1 ports are under the USB 2.0 hub. If the port speed
1445 * matches the device speed, it's a similar speed port.
1447 if ((port_speed
== 0x03) == (hcd
->speed
== HCD_USB3
))
1448 num_similar_speed_ports
++;
1450 return num_similar_speed_ports
;
1453 static void handle_device_notification(struct xhci_hcd
*xhci
,
1454 union xhci_trb
*event
)
1457 struct usb_device
*udev
;
1459 slot_id
= TRB_TO_SLOT_ID(le32_to_cpu(event
->generic
.field
[3]));
1460 if (!xhci
->devs
[slot_id
]) {
1461 xhci_warn(xhci
, "Device Notification event for "
1462 "unused slot %u\n", slot_id
);
1466 xhci_dbg(xhci
, "Device Wake Notification event for slot ID %u\n",
1468 udev
= xhci
->devs
[slot_id
]->udev
;
1469 if (udev
&& udev
->parent
)
1470 usb_wakeup_notification(udev
->parent
, udev
->portnum
);
1473 static void handle_port_status(struct xhci_hcd
*xhci
,
1474 union xhci_trb
*event
)
1476 struct usb_hcd
*hcd
;
1481 unsigned int faked_port_index
;
1483 struct xhci_bus_state
*bus_state
;
1484 __le32 __iomem
**port_array
;
1485 bool bogus_port_status
= false;
1487 /* Port status change events always have a successful completion code */
1488 if (GET_COMP_CODE(le32_to_cpu(event
->generic
.field
[2])) != COMP_SUCCESS
) {
1489 xhci_warn(xhci
, "WARN: xHC returned failed port status event\n");
1490 xhci
->error_bitmask
|= 1 << 8;
1492 port_id
= GET_PORT_ID(le32_to_cpu(event
->generic
.field
[0]));
1493 xhci_dbg(xhci
, "Port Status Change Event for port %d\n", port_id
);
1495 max_ports
= HCS_MAX_PORTS(xhci
->hcs_params1
);
1496 if ((port_id
<= 0) || (port_id
> max_ports
)) {
1497 xhci_warn(xhci
, "Invalid port id %d\n", port_id
);
1498 inc_deq(xhci
, xhci
->event_ring
);
1502 /* Figure out which usb_hcd this port is attached to:
1503 * is it a USB 3.0 port or a USB 2.0/1.1 port?
1505 major_revision
= xhci
->port_array
[port_id
- 1];
1507 /* Find the right roothub. */
1508 hcd
= xhci_to_hcd(xhci
);
1509 if ((major_revision
== 0x03) != (hcd
->speed
== HCD_USB3
))
1510 hcd
= xhci
->shared_hcd
;
1512 if (major_revision
== 0) {
1513 xhci_warn(xhci
, "Event for port %u not in "
1514 "Extended Capabilities, ignoring.\n",
1516 bogus_port_status
= true;
1519 if (major_revision
== DUPLICATE_ENTRY
) {
1520 xhci_warn(xhci
, "Event for port %u duplicated in"
1521 "Extended Capabilities, ignoring.\n",
1523 bogus_port_status
= true;
1528 * Hardware port IDs reported by a Port Status Change Event include USB
1529 * 3.0 and USB 2.0 ports. We want to check if the port has reported a
1530 * resume event, but we first need to translate the hardware port ID
1531 * into the index into the ports on the correct split roothub, and the
1532 * correct bus_state structure.
1534 bus_state
= &xhci
->bus_state
[hcd_index(hcd
)];
1535 if (hcd
->speed
== HCD_USB3
)
1536 port_array
= xhci
->usb3_ports
;
1538 port_array
= xhci
->usb2_ports
;
1539 /* Find the faked port hub number */
1540 faked_port_index
= find_faked_portnum_from_hw_portnum(hcd
, xhci
,
1543 temp
= readl(port_array
[faked_port_index
]);
1544 if (hcd
->state
== HC_STATE_SUSPENDED
) {
1545 xhci_dbg(xhci
, "resume root hub\n");
1546 usb_hcd_resume_root_hub(hcd
);
1549 if ((temp
& PORT_PLC
) && (temp
& PORT_PLS_MASK
) == XDEV_RESUME
) {
1550 xhci_dbg(xhci
, "port resume event for port %d\n", port_id
);
1552 temp1
= readl(&xhci
->op_regs
->command
);
1553 if (!(temp1
& CMD_RUN
)) {
1554 xhci_warn(xhci
, "xHC is not running.\n");
1558 if (DEV_SUPERSPEED(temp
)) {
1559 xhci_dbg(xhci
, "remote wake SS port %d\n", port_id
);
1560 /* Set a flag to say the port signaled remote wakeup,
1561 * so we can tell the difference between the end of
1562 * device and host initiated resume.
1564 bus_state
->port_remote_wakeup
|= 1 << faked_port_index
;
1565 xhci_test_and_clear_bit(xhci
, port_array
,
1566 faked_port_index
, PORT_PLC
);
1567 xhci_set_link_state(xhci
, port_array
, faked_port_index
,
1569 /* Need to wait until the next link state change
1570 * indicates the device is actually in U0.
1572 bogus_port_status
= true;
1575 xhci_dbg(xhci
, "resume HS port %d\n", port_id
);
1576 bus_state
->resume_done
[faked_port_index
] = jiffies
+
1577 msecs_to_jiffies(20);
1578 set_bit(faked_port_index
, &bus_state
->resuming_ports
);
1579 mod_timer(&hcd
->rh_timer
,
1580 bus_state
->resume_done
[faked_port_index
]);
1581 /* Do the rest in GetPortStatus */
1585 if ((temp
& PORT_PLC
) && (temp
& PORT_PLS_MASK
) == XDEV_U0
&&
1586 DEV_SUPERSPEED(temp
)) {
1587 xhci_dbg(xhci
, "resume SS port %d finished\n", port_id
);
1588 /* We've just brought the device into U0 through either the
1589 * Resume state after a device remote wakeup, or through the
1590 * U3Exit state after a host-initiated resume. If it's a device
1591 * initiated remote wake, don't pass up the link state change,
1592 * so the roothub behavior is consistent with external
1593 * USB 3.0 hub behavior.
1595 slot_id
= xhci_find_slot_id_by_port(hcd
, xhci
,
1596 faked_port_index
+ 1);
1597 if (slot_id
&& xhci
->devs
[slot_id
])
1598 xhci_ring_device(xhci
, slot_id
);
1599 if (bus_state
->port_remote_wakeup
& (1 << faked_port_index
)) {
1600 bus_state
->port_remote_wakeup
&=
1601 ~(1 << faked_port_index
);
1602 xhci_test_and_clear_bit(xhci
, port_array
,
1603 faked_port_index
, PORT_PLC
);
1604 usb_wakeup_notification(hcd
->self
.root_hub
,
1605 faked_port_index
+ 1);
1606 bogus_port_status
= true;
1612 * Check to see if xhci-hub.c is waiting on RExit to U0 transition (or
1613 * RExit to a disconnect state). If so, let the the driver know it's
1614 * out of the RExit state.
1616 if (!DEV_SUPERSPEED(temp
) &&
1617 test_and_clear_bit(faked_port_index
,
1618 &bus_state
->rexit_ports
)) {
1619 complete(&bus_state
->rexit_done
[faked_port_index
]);
1620 bogus_port_status
= true;
1624 if (hcd
->speed
!= HCD_USB3
)
1625 xhci_test_and_clear_bit(xhci
, port_array
, faked_port_index
,
1629 /* Update event ring dequeue pointer before dropping the lock */
1630 inc_deq(xhci
, xhci
->event_ring
);
1632 /* Don't make the USB core poll the roothub if we got a bad port status
1633 * change event. Besides, at that point we can't tell which roothub
1634 * (USB 2.0 or USB 3.0) to kick.
1636 if (bogus_port_status
)
1640 * xHCI port-status-change events occur when the "or" of all the
1641 * status-change bits in the portsc register changes from 0 to 1.
1642 * New status changes won't cause an event if any other change
1643 * bits are still set. When an event occurs, switch over to
1644 * polling to avoid losing status changes.
1646 xhci_dbg(xhci
, "%s: starting port polling.\n", __func__
);
1647 set_bit(HCD_FLAG_POLL_RH
, &hcd
->flags
);
1648 spin_unlock(&xhci
->lock
);
1649 /* Pass this up to the core */
1650 usb_hcd_poll_rh_status(hcd
);
1651 spin_lock(&xhci
->lock
);
1655 * This TD is defined by the TRBs starting at start_trb in start_seg and ending
1656 * at end_trb, which may be in another segment. If the suspect DMA address is a
1657 * TRB in this TD, this function returns that TRB's segment. Otherwise it
1660 struct xhci_segment
*trb_in_td(struct xhci_hcd
*xhci
,
1661 struct xhci_segment
*start_seg
,
1662 union xhci_trb
*start_trb
,
1663 union xhci_trb
*end_trb
,
1664 dma_addr_t suspect_dma
,
1667 dma_addr_t start_dma
;
1668 dma_addr_t end_seg_dma
;
1669 dma_addr_t end_trb_dma
;
1670 struct xhci_segment
*cur_seg
;
1672 start_dma
= xhci_trb_virt_to_dma(start_seg
, start_trb
);
1673 cur_seg
= start_seg
;
1678 /* We may get an event for a Link TRB in the middle of a TD */
1679 end_seg_dma
= xhci_trb_virt_to_dma(cur_seg
,
1680 &cur_seg
->trbs
[TRBS_PER_SEGMENT
- 1]);
1681 /* If the end TRB isn't in this segment, this is set to 0 */
1682 end_trb_dma
= xhci_trb_virt_to_dma(cur_seg
, end_trb
);
1686 "Looking for event-dma %016llx trb-start %016llx trb-end %016llx seg-start %016llx seg-end %016llx\n",
1687 (unsigned long long)suspect_dma
,
1688 (unsigned long long)start_dma
,
1689 (unsigned long long)end_trb_dma
,
1690 (unsigned long long)cur_seg
->dma
,
1691 (unsigned long long)end_seg_dma
);
1693 if (end_trb_dma
> 0) {
1694 /* The end TRB is in this segment, so suspect should be here */
1695 if (start_dma
<= end_trb_dma
) {
1696 if (suspect_dma
>= start_dma
&& suspect_dma
<= end_trb_dma
)
1699 /* Case for one segment with
1700 * a TD wrapped around to the top
1702 if ((suspect_dma
>= start_dma
&&
1703 suspect_dma
<= end_seg_dma
) ||
1704 (suspect_dma
>= cur_seg
->dma
&&
1705 suspect_dma
<= end_trb_dma
))
1710 /* Might still be somewhere in this segment */
1711 if (suspect_dma
>= start_dma
&& suspect_dma
<= end_seg_dma
)
1714 cur_seg
= cur_seg
->next
;
1715 start_dma
= xhci_trb_virt_to_dma(cur_seg
, &cur_seg
->trbs
[0]);
1716 } while (cur_seg
!= start_seg
);
1721 static void xhci_cleanup_halted_endpoint(struct xhci_hcd
*xhci
,
1722 unsigned int slot_id
, unsigned int ep_index
,
1723 unsigned int stream_id
,
1724 struct xhci_td
*td
, union xhci_trb
*event_trb
)
1726 struct xhci_virt_ep
*ep
= &xhci
->devs
[slot_id
]->eps
[ep_index
];
1727 struct xhci_command
*command
;
1728 command
= xhci_alloc_command(xhci
, false, false, GFP_ATOMIC
);
1732 ep
->ep_state
|= EP_HALTED
| EP_RECENTLY_HALTED
;
1733 ep
->stopped_stream
= stream_id
;
1735 xhci_queue_reset_ep(xhci
, command
, slot_id
, ep_index
);
1736 xhci_cleanup_stalled_ring(xhci
, ep_index
, td
);
1738 ep
->stopped_stream
= 0;
1740 xhci_ring_cmd_db(xhci
);
1743 /* Check if an error has halted the endpoint ring. The class driver will
1744 * cleanup the halt for a non-default control endpoint if we indicate a stall.
1745 * However, a babble and other errors also halt the endpoint ring, and the class
1746 * driver won't clear the halt in that case, so we need to issue a Set Transfer
1747 * Ring Dequeue Pointer command manually.
1749 static int xhci_requires_manual_halt_cleanup(struct xhci_hcd
*xhci
,
1750 struct xhci_ep_ctx
*ep_ctx
,
1751 unsigned int trb_comp_code
)
1753 /* TRB completion codes that may require a manual halt cleanup */
1754 if (trb_comp_code
== COMP_TX_ERR
||
1755 trb_comp_code
== COMP_BABBLE
||
1756 trb_comp_code
== COMP_SPLIT_ERR
)
1757 /* The 0.96 spec says a babbling control endpoint
1758 * is not halted. The 0.96 spec says it is. Some HW
1759 * claims to be 0.95 compliant, but it halts the control
1760 * endpoint anyway. Check if a babble halted the
1763 if ((ep_ctx
->ep_info
& cpu_to_le32(EP_STATE_MASK
)) ==
1764 cpu_to_le32(EP_STATE_HALTED
))
1770 int xhci_is_vendor_info_code(struct xhci_hcd
*xhci
, unsigned int trb_comp_code
)
1772 if (trb_comp_code
>= 224 && trb_comp_code
<= 255) {
1773 /* Vendor defined "informational" completion code,
1774 * treat as not-an-error.
1776 xhci_dbg(xhci
, "Vendor defined info completion code %u\n",
1778 xhci_dbg(xhci
, "Treating code as success.\n");
1785 * Finish the td processing, remove the td from td list;
1786 * Return 1 if the urb can be given back.
1788 static int finish_td(struct xhci_hcd
*xhci
, struct xhci_td
*td
,
1789 union xhci_trb
*event_trb
, struct xhci_transfer_event
*event
,
1790 struct xhci_virt_ep
*ep
, int *status
, bool skip
)
1792 struct xhci_virt_device
*xdev
;
1793 struct xhci_ring
*ep_ring
;
1794 unsigned int slot_id
;
1796 struct urb
*urb
= NULL
;
1797 struct xhci_ep_ctx
*ep_ctx
;
1799 struct urb_priv
*urb_priv
;
1802 slot_id
= TRB_TO_SLOT_ID(le32_to_cpu(event
->flags
));
1803 xdev
= xhci
->devs
[slot_id
];
1804 ep_index
= TRB_TO_EP_ID(le32_to_cpu(event
->flags
)) - 1;
1805 ep_ring
= xhci_dma_to_transfer_ring(ep
, le64_to_cpu(event
->buffer
));
1806 ep_ctx
= xhci_get_ep_ctx(xhci
, xdev
->out_ctx
, ep_index
);
1807 trb_comp_code
= GET_COMP_CODE(le32_to_cpu(event
->transfer_len
));
1812 if (trb_comp_code
== COMP_STOP_INVAL
|| trb_comp_code
== COMP_STOP
) {
1813 /* The Endpoint Stop Command completion will take care of any
1814 * stopped TDs. A stopped TD may be restarted, so don't update
1815 * the ring dequeue pointer or take this TD off any lists yet.
1817 ep
->stopped_td
= td
;
1820 if (trb_comp_code
== COMP_STALL
||
1821 xhci_requires_manual_halt_cleanup(xhci
, ep_ctx
,
1823 /* Issue a reset endpoint command to clear the host side
1824 * halt, followed by a set dequeue command to move the
1825 * dequeue pointer past the TD.
1826 * The class driver clears the device side halt later.
1828 xhci_cleanup_halted_endpoint(xhci
, slot_id
, ep_index
,
1829 ep_ring
->stream_id
, td
, event_trb
);
1831 /* Update ring dequeue pointer */
1832 while (ep_ring
->dequeue
!= td
->last_trb
)
1833 inc_deq(xhci
, ep_ring
);
1834 inc_deq(xhci
, ep_ring
);
1838 /* Clean up the endpoint's TD list */
1840 urb_priv
= urb
->hcpriv
;
1842 /* Do one last check of the actual transfer length.
1843 * If the host controller said we transferred more data than the buffer
1844 * length, urb->actual_length will be a very big number (since it's
1845 * unsigned). Play it safe and say we didn't transfer anything.
1847 if (urb
->actual_length
> urb
->transfer_buffer_length
) {
1848 xhci_warn(xhci
, "URB transfer length is wrong, xHC issue? req. len = %u, act. len = %u\n",
1849 urb
->transfer_buffer_length
,
1850 urb
->actual_length
);
1851 urb
->actual_length
= 0;
1852 if (td
->urb
->transfer_flags
& URB_SHORT_NOT_OK
)
1853 *status
= -EREMOTEIO
;
1857 list_del_init(&td
->td_list
);
1858 /* Was this TD slated to be cancelled but completed anyway? */
1859 if (!list_empty(&td
->cancelled_td_list
))
1860 list_del_init(&td
->cancelled_td_list
);
1863 /* Giveback the urb when all the tds are completed */
1864 if (urb_priv
->td_cnt
== urb_priv
->length
) {
1866 if (usb_pipetype(urb
->pipe
) == PIPE_ISOCHRONOUS
) {
1867 xhci_to_hcd(xhci
)->self
.bandwidth_isoc_reqs
--;
1868 if (xhci_to_hcd(xhci
)->self
.bandwidth_isoc_reqs
== 0) {
1869 if (xhci
->quirks
& XHCI_AMD_PLL_FIX
)
1870 usb_amd_quirk_pll_enable();
1879 * Process control tds, update urb status and actual_length.
1881 static int process_ctrl_td(struct xhci_hcd
*xhci
, struct xhci_td
*td
,
1882 union xhci_trb
*event_trb
, struct xhci_transfer_event
*event
,
1883 struct xhci_virt_ep
*ep
, int *status
)
1885 struct xhci_virt_device
*xdev
;
1886 struct xhci_ring
*ep_ring
;
1887 unsigned int slot_id
;
1889 struct xhci_ep_ctx
*ep_ctx
;
1892 slot_id
= TRB_TO_SLOT_ID(le32_to_cpu(event
->flags
));
1893 xdev
= xhci
->devs
[slot_id
];
1894 ep_index
= TRB_TO_EP_ID(le32_to_cpu(event
->flags
)) - 1;
1895 ep_ring
= xhci_dma_to_transfer_ring(ep
, le64_to_cpu(event
->buffer
));
1896 ep_ctx
= xhci_get_ep_ctx(xhci
, xdev
->out_ctx
, ep_index
);
1897 trb_comp_code
= GET_COMP_CODE(le32_to_cpu(event
->transfer_len
));
1899 switch (trb_comp_code
) {
1901 if (event_trb
== ep_ring
->dequeue
) {
1902 xhci_warn(xhci
, "WARN: Success on ctrl setup TRB "
1903 "without IOC set??\n");
1904 *status
= -ESHUTDOWN
;
1905 } else if (event_trb
!= td
->last_trb
) {
1906 xhci_warn(xhci
, "WARN: Success on ctrl data TRB "
1907 "without IOC set??\n");
1908 *status
= -ESHUTDOWN
;
1914 if (td
->urb
->transfer_flags
& URB_SHORT_NOT_OK
)
1915 *status
= -EREMOTEIO
;
1919 case COMP_STOP_INVAL
:
1921 return finish_td(xhci
, td
, event_trb
, event
, ep
, status
, false);
1923 if (!xhci_requires_manual_halt_cleanup(xhci
,
1924 ep_ctx
, trb_comp_code
))
1926 xhci_dbg(xhci
, "TRB error code %u, "
1927 "halted endpoint index = %u\n",
1928 trb_comp_code
, ep_index
);
1929 /* else fall through */
1931 /* Did we transfer part of the data (middle) phase? */
1932 if (event_trb
!= ep_ring
->dequeue
&&
1933 event_trb
!= td
->last_trb
)
1934 td
->urb
->actual_length
=
1935 td
->urb
->transfer_buffer_length
-
1936 EVENT_TRB_LEN(le32_to_cpu(event
->transfer_len
));
1938 td
->urb
->actual_length
= 0;
1940 return finish_td(xhci
, td
, event_trb
, event
, ep
, status
, false);
1943 * Did we transfer any data, despite the errors that might have
1944 * happened? I.e. did we get past the setup stage?
1946 if (event_trb
!= ep_ring
->dequeue
) {
1947 /* The event was for the status stage */
1948 if (event_trb
== td
->last_trb
) {
1949 if (td
->urb_length_set
) {
1950 /* Don't overwrite a previously set error code
1952 if ((*status
== -EINPROGRESS
|| *status
== 0) &&
1953 (td
->urb
->transfer_flags
1954 & URB_SHORT_NOT_OK
))
1955 /* Did we already see a short data
1957 *status
= -EREMOTEIO
;
1959 td
->urb
->actual_length
=
1960 td
->urb
->transfer_buffer_length
;
1964 * Maybe the event was for the data stage? If so, update
1965 * already the actual_length of the URB and flag it as
1966 * set, so that it is not overwritten in the event for
1969 td
->urb_length_set
= true;
1970 td
->urb
->actual_length
=
1971 td
->urb
->transfer_buffer_length
-
1972 EVENT_TRB_LEN(le32_to_cpu(event
->transfer_len
));
1973 xhci_dbg(xhci
, "Waiting for status "
1979 return finish_td(xhci
, td
, event_trb
, event
, ep
, status
, false);
1983 * Process isochronous tds, update urb packet status and actual_length.
1985 static int process_isoc_td(struct xhci_hcd
*xhci
, struct xhci_td
*td
,
1986 union xhci_trb
*event_trb
, struct xhci_transfer_event
*event
,
1987 struct xhci_virt_ep
*ep
, int *status
)
1989 struct xhci_ring
*ep_ring
;
1990 struct urb_priv
*urb_priv
;
1993 union xhci_trb
*cur_trb
;
1994 struct xhci_segment
*cur_seg
;
1995 struct usb_iso_packet_descriptor
*frame
;
1997 bool skip_td
= false;
1999 ep_ring
= xhci_dma_to_transfer_ring(ep
, le64_to_cpu(event
->buffer
));
2000 trb_comp_code
= GET_COMP_CODE(le32_to_cpu(event
->transfer_len
));
2001 urb_priv
= td
->urb
->hcpriv
;
2002 idx
= urb_priv
->td_cnt
;
2003 frame
= &td
->urb
->iso_frame_desc
[idx
];
2005 /* handle completion code */
2006 switch (trb_comp_code
) {
2008 if (EVENT_TRB_LEN(le32_to_cpu(event
->transfer_len
)) == 0) {
2012 if ((xhci
->quirks
& XHCI_TRUST_TX_LENGTH
))
2013 trb_comp_code
= COMP_SHORT_TX
;
2015 frame
->status
= td
->urb
->transfer_flags
& URB_SHORT_NOT_OK
?
2019 frame
->status
= -ECOMM
;
2022 case COMP_BUFF_OVER
:
2024 frame
->status
= -EOVERFLOW
;
2030 frame
->status
= -EPROTO
;
2034 case COMP_STOP_INVAL
:
2041 if (trb_comp_code
== COMP_SUCCESS
|| skip_td
) {
2042 frame
->actual_length
= frame
->length
;
2043 td
->urb
->actual_length
+= frame
->length
;
2045 for (cur_trb
= ep_ring
->dequeue
,
2046 cur_seg
= ep_ring
->deq_seg
; cur_trb
!= event_trb
;
2047 next_trb(xhci
, ep_ring
, &cur_seg
, &cur_trb
)) {
2048 if (!TRB_TYPE_NOOP_LE32(cur_trb
->generic
.field
[3]) &&
2049 !TRB_TYPE_LINK_LE32(cur_trb
->generic
.field
[3]))
2050 len
+= TRB_LEN(le32_to_cpu(cur_trb
->generic
.field
[2]));
2052 len
+= TRB_LEN(le32_to_cpu(cur_trb
->generic
.field
[2])) -
2053 EVENT_TRB_LEN(le32_to_cpu(event
->transfer_len
));
2055 if (trb_comp_code
!= COMP_STOP_INVAL
) {
2056 frame
->actual_length
= len
;
2057 td
->urb
->actual_length
+= len
;
2061 return finish_td(xhci
, td
, event_trb
, event
, ep
, status
, false);
2064 static int skip_isoc_td(struct xhci_hcd
*xhci
, struct xhci_td
*td
,
2065 struct xhci_transfer_event
*event
,
2066 struct xhci_virt_ep
*ep
, int *status
)
2068 struct xhci_ring
*ep_ring
;
2069 struct urb_priv
*urb_priv
;
2070 struct usb_iso_packet_descriptor
*frame
;
2073 ep_ring
= xhci_dma_to_transfer_ring(ep
, le64_to_cpu(event
->buffer
));
2074 urb_priv
= td
->urb
->hcpriv
;
2075 idx
= urb_priv
->td_cnt
;
2076 frame
= &td
->urb
->iso_frame_desc
[idx
];
2078 /* The transfer is partly done. */
2079 frame
->status
= -EXDEV
;
2081 /* calc actual length */
2082 frame
->actual_length
= 0;
2084 /* Update ring dequeue pointer */
2085 while (ep_ring
->dequeue
!= td
->last_trb
)
2086 inc_deq(xhci
, ep_ring
);
2087 inc_deq(xhci
, ep_ring
);
2089 return finish_td(xhci
, td
, NULL
, event
, ep
, status
, true);
2093 * Process bulk and interrupt tds, update urb status and actual_length.
2095 static int process_bulk_intr_td(struct xhci_hcd
*xhci
, struct xhci_td
*td
,
2096 union xhci_trb
*event_trb
, struct xhci_transfer_event
*event
,
2097 struct xhci_virt_ep
*ep
, int *status
)
2099 struct xhci_ring
*ep_ring
;
2100 union xhci_trb
*cur_trb
;
2101 struct xhci_segment
*cur_seg
;
2104 ep_ring
= xhci_dma_to_transfer_ring(ep
, le64_to_cpu(event
->buffer
));
2105 trb_comp_code
= GET_COMP_CODE(le32_to_cpu(event
->transfer_len
));
2107 switch (trb_comp_code
) {
2109 /* Double check that the HW transferred everything. */
2110 if (event_trb
!= td
->last_trb
||
2111 EVENT_TRB_LEN(le32_to_cpu(event
->transfer_len
)) != 0) {
2112 xhci_warn(xhci
, "WARN Successful completion "
2114 if (td
->urb
->transfer_flags
& URB_SHORT_NOT_OK
)
2115 *status
= -EREMOTEIO
;
2118 if ((xhci
->quirks
& XHCI_TRUST_TX_LENGTH
))
2119 trb_comp_code
= COMP_SHORT_TX
;
2125 if (td
->urb
->transfer_flags
& URB_SHORT_NOT_OK
)
2126 *status
= -EREMOTEIO
;
2131 /* Others already handled above */
2134 if (trb_comp_code
== COMP_SHORT_TX
)
2135 xhci_dbg(xhci
, "ep %#x - asked for %d bytes, "
2136 "%d bytes untransferred\n",
2137 td
->urb
->ep
->desc
.bEndpointAddress
,
2138 td
->urb
->transfer_buffer_length
,
2139 EVENT_TRB_LEN(le32_to_cpu(event
->transfer_len
)));
2140 /* Fast path - was this the last TRB in the TD for this URB? */
2141 if (event_trb
== td
->last_trb
) {
2142 if (EVENT_TRB_LEN(le32_to_cpu(event
->transfer_len
)) != 0) {
2143 td
->urb
->actual_length
=
2144 td
->urb
->transfer_buffer_length
-
2145 EVENT_TRB_LEN(le32_to_cpu(event
->transfer_len
));
2146 if (td
->urb
->transfer_buffer_length
<
2147 td
->urb
->actual_length
) {
2148 xhci_warn(xhci
, "HC gave bad length "
2149 "of %d bytes left\n",
2150 EVENT_TRB_LEN(le32_to_cpu(event
->transfer_len
)));
2151 td
->urb
->actual_length
= 0;
2152 if (td
->urb
->transfer_flags
& URB_SHORT_NOT_OK
)
2153 *status
= -EREMOTEIO
;
2157 /* Don't overwrite a previously set error code */
2158 if (*status
== -EINPROGRESS
) {
2159 if (td
->urb
->transfer_flags
& URB_SHORT_NOT_OK
)
2160 *status
= -EREMOTEIO
;
2165 td
->urb
->actual_length
=
2166 td
->urb
->transfer_buffer_length
;
2167 /* Ignore a short packet completion if the
2168 * untransferred length was zero.
2170 if (*status
== -EREMOTEIO
)
2174 /* Slow path - walk the list, starting from the dequeue
2175 * pointer, to get the actual length transferred.
2177 td
->urb
->actual_length
= 0;
2178 for (cur_trb
= ep_ring
->dequeue
, cur_seg
= ep_ring
->deq_seg
;
2179 cur_trb
!= event_trb
;
2180 next_trb(xhci
, ep_ring
, &cur_seg
, &cur_trb
)) {
2181 if (!TRB_TYPE_NOOP_LE32(cur_trb
->generic
.field
[3]) &&
2182 !TRB_TYPE_LINK_LE32(cur_trb
->generic
.field
[3]))
2183 td
->urb
->actual_length
+=
2184 TRB_LEN(le32_to_cpu(cur_trb
->generic
.field
[2]));
2186 /* If the ring didn't stop on a Link or No-op TRB, add
2187 * in the actual bytes transferred from the Normal TRB
2189 if (trb_comp_code
!= COMP_STOP_INVAL
)
2190 td
->urb
->actual_length
+=
2191 TRB_LEN(le32_to_cpu(cur_trb
->generic
.field
[2])) -
2192 EVENT_TRB_LEN(le32_to_cpu(event
->transfer_len
));
2195 return finish_td(xhci
, td
, event_trb
, event
, ep
, status
, false);
2199 * If this function returns an error condition, it means it got a Transfer
2200 * event with a corrupted Slot ID, Endpoint ID, or TRB DMA address.
2201 * At this point, the host controller is probably hosed and should be reset.
2203 static int handle_tx_event(struct xhci_hcd
*xhci
,
2204 struct xhci_transfer_event
*event
)
2205 __releases(&xhci
->lock
)
2206 __acquires(&xhci
->lock
)
2208 struct xhci_virt_device
*xdev
;
2209 struct xhci_virt_ep
*ep
;
2210 struct xhci_ring
*ep_ring
;
2211 unsigned int slot_id
;
2213 struct xhci_td
*td
= NULL
;
2214 dma_addr_t event_dma
;
2215 struct xhci_segment
*event_seg
;
2216 union xhci_trb
*event_trb
;
2217 struct urb
*urb
= NULL
;
2218 int status
= -EINPROGRESS
;
2219 struct urb_priv
*urb_priv
;
2220 struct xhci_ep_ctx
*ep_ctx
;
2221 struct list_head
*tmp
;
2226 slot_id
= TRB_TO_SLOT_ID(le32_to_cpu(event
->flags
));
2227 xdev
= xhci
->devs
[slot_id
];
2229 xhci_err(xhci
, "ERROR Transfer event pointed to bad slot\n");
2230 xhci_err(xhci
, "@%016llx %08x %08x %08x %08x\n",
2231 (unsigned long long) xhci_trb_virt_to_dma(
2232 xhci
->event_ring
->deq_seg
,
2233 xhci
->event_ring
->dequeue
),
2234 lower_32_bits(le64_to_cpu(event
->buffer
)),
2235 upper_32_bits(le64_to_cpu(event
->buffer
)),
2236 le32_to_cpu(event
->transfer_len
),
2237 le32_to_cpu(event
->flags
));
2238 xhci_dbg(xhci
, "Event ring:\n");
2239 xhci_debug_segment(xhci
, xhci
->event_ring
->deq_seg
);
2243 /* Endpoint ID is 1 based, our index is zero based */
2244 ep_index
= TRB_TO_EP_ID(le32_to_cpu(event
->flags
)) - 1;
2245 ep
= &xdev
->eps
[ep_index
];
2246 ep_ring
= xhci_dma_to_transfer_ring(ep
, le64_to_cpu(event
->buffer
));
2247 ep_ctx
= xhci_get_ep_ctx(xhci
, xdev
->out_ctx
, ep_index
);
2249 (le32_to_cpu(ep_ctx
->ep_info
) & EP_STATE_MASK
) ==
2250 EP_STATE_DISABLED
) {
2251 xhci_err(xhci
, "ERROR Transfer event for disabled endpoint "
2252 "or incorrect stream ring\n");
2253 xhci_err(xhci
, "@%016llx %08x %08x %08x %08x\n",
2254 (unsigned long long) xhci_trb_virt_to_dma(
2255 xhci
->event_ring
->deq_seg
,
2256 xhci
->event_ring
->dequeue
),
2257 lower_32_bits(le64_to_cpu(event
->buffer
)),
2258 upper_32_bits(le64_to_cpu(event
->buffer
)),
2259 le32_to_cpu(event
->transfer_len
),
2260 le32_to_cpu(event
->flags
));
2261 xhci_dbg(xhci
, "Event ring:\n");
2262 xhci_debug_segment(xhci
, xhci
->event_ring
->deq_seg
);
2266 /* Count current td numbers if ep->skip is set */
2268 list_for_each(tmp
, &ep_ring
->td_list
)
2272 event_dma
= le64_to_cpu(event
->buffer
);
2273 trb_comp_code
= GET_COMP_CODE(le32_to_cpu(event
->transfer_len
));
2274 /* Look for common error cases */
2275 switch (trb_comp_code
) {
2276 /* Skip codes that require special handling depending on
2280 if (EVENT_TRB_LEN(le32_to_cpu(event
->transfer_len
)) == 0)
2282 if (xhci
->quirks
& XHCI_TRUST_TX_LENGTH
)
2283 trb_comp_code
= COMP_SHORT_TX
;
2285 xhci_warn_ratelimited(xhci
,
2286 "WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?\n");
2290 xhci_dbg(xhci
, "Stopped on Transfer TRB\n");
2292 case COMP_STOP_INVAL
:
2293 xhci_dbg(xhci
, "Stopped on No-op or Link TRB\n");
2296 xhci_dbg(xhci
, "Stalled endpoint\n");
2297 ep
->ep_state
|= EP_HALTED
;
2301 xhci_warn(xhci
, "WARN: TRB error on endpoint\n");
2304 case COMP_SPLIT_ERR
:
2306 xhci_dbg(xhci
, "Transfer error on endpoint\n");
2310 xhci_dbg(xhci
, "Babble error on endpoint\n");
2311 status
= -EOVERFLOW
;
2314 xhci_warn(xhci
, "WARN: HC couldn't access mem fast enough\n");
2318 xhci_warn(xhci
, "WARN: bandwidth overrun event on endpoint\n");
2320 case COMP_BUFF_OVER
:
2321 xhci_warn(xhci
, "WARN: buffer overrun event on endpoint\n");
2325 * When the Isoch ring is empty, the xHC will generate
2326 * a Ring Overrun Event for IN Isoch endpoint or Ring
2327 * Underrun Event for OUT Isoch endpoint.
2329 xhci_dbg(xhci
, "underrun event on endpoint\n");
2330 if (!list_empty(&ep_ring
->td_list
))
2331 xhci_dbg(xhci
, "Underrun Event for slot %d ep %d "
2332 "still with TDs queued?\n",
2333 TRB_TO_SLOT_ID(le32_to_cpu(event
->flags
)),
2337 xhci_dbg(xhci
, "overrun event on endpoint\n");
2338 if (!list_empty(&ep_ring
->td_list
))
2339 xhci_dbg(xhci
, "Overrun Event for slot %d ep %d "
2340 "still with TDs queued?\n",
2341 TRB_TO_SLOT_ID(le32_to_cpu(event
->flags
)),
2345 xhci_warn(xhci
, "WARN: detect an incompatible device");
2348 case COMP_MISSED_INT
:
2350 * When encounter missed service error, one or more isoc tds
2351 * may be missed by xHC.
2352 * Set skip flag of the ep_ring; Complete the missed tds as
2353 * short transfer when process the ep_ring next time.
2356 xhci_dbg(xhci
, "Miss service interval error, set skip flag\n");
2359 if (xhci_is_vendor_info_code(xhci
, trb_comp_code
)) {
2363 xhci_warn(xhci
, "ERROR Unknown event condition %u, HC probably busted\n",
2369 /* This TRB should be in the TD at the head of this ring's
2372 if (list_empty(&ep_ring
->td_list
)) {
2374 * A stopped endpoint may generate an extra completion
2375 * event if the device was suspended. Don't print
2378 if (!(trb_comp_code
== COMP_STOP
||
2379 trb_comp_code
== COMP_STOP_INVAL
)) {
2380 xhci_warn(xhci
, "WARN Event TRB for slot %d ep %d with no TDs queued?\n",
2381 TRB_TO_SLOT_ID(le32_to_cpu(event
->flags
)),
2383 xhci_dbg(xhci
, "Event TRB with TRB type ID %u\n",
2384 (le32_to_cpu(event
->flags
) &
2385 TRB_TYPE_BITMASK
)>>10);
2386 xhci_print_trb_offsets(xhci
, (union xhci_trb
*) event
);
2390 xhci_dbg(xhci
, "td_list is empty while skip "
2391 "flag set. Clear skip flag.\n");
2397 /* We've skipped all the TDs on the ep ring when ep->skip set */
2398 if (ep
->skip
&& td_num
== 0) {
2400 xhci_dbg(xhci
, "All tds on the ep_ring skipped. "
2401 "Clear skip flag.\n");
2406 td
= list_entry(ep_ring
->td_list
.next
, struct xhci_td
, td_list
);
2410 /* Is this a TRB in the currently executing TD? */
2411 event_seg
= trb_in_td(xhci
, ep_ring
->deq_seg
, ep_ring
->dequeue
,
2412 td
->last_trb
, event_dma
, false);
2415 * Skip the Force Stopped Event. The event_trb(event_dma) of FSE
2416 * is not in the current TD pointed by ep_ring->dequeue because
2417 * that the hardware dequeue pointer still at the previous TRB
2418 * of the current TD. The previous TRB maybe a Link TD or the
2419 * last TRB of the previous TD. The command completion handle
2420 * will take care the rest.
2422 if (!event_seg
&& (trb_comp_code
== COMP_STOP
||
2423 trb_comp_code
== COMP_STOP_INVAL
)) {
2430 !usb_endpoint_xfer_isoc(&td
->urb
->ep
->desc
)) {
2431 /* Some host controllers give a spurious
2432 * successful event after a short transfer.
2435 if ((xhci
->quirks
& XHCI_SPURIOUS_SUCCESS
) &&
2436 ep_ring
->last_td_was_short
) {
2437 ep_ring
->last_td_was_short
= false;
2441 /* HC is busted, give up! */
2443 "ERROR Transfer event TRB DMA ptr not "
2444 "part of current TD ep_index %d "
2445 "comp_code %u\n", ep_index
,
2447 trb_in_td(xhci
, ep_ring
->deq_seg
,
2448 ep_ring
->dequeue
, td
->last_trb
,
2453 ret
= skip_isoc_td(xhci
, td
, event
, ep
, &status
);
2456 if (trb_comp_code
== COMP_SHORT_TX
)
2457 ep_ring
->last_td_was_short
= true;
2459 ep_ring
->last_td_was_short
= false;
2462 xhci_dbg(xhci
, "Found td. Clear skip flag.\n");
2466 event_trb
= &event_seg
->trbs
[(event_dma
- event_seg
->dma
) /
2467 sizeof(*event_trb
)];
2469 * No-op TRB should not trigger interrupts.
2470 * If event_trb is a no-op TRB, it means the
2471 * corresponding TD has been cancelled. Just ignore
2474 if (TRB_TYPE_NOOP_LE32(event_trb
->generic
.field
[3])) {
2476 "event_trb is a no-op TRB. Skip it\n");
2480 /* Now update the urb's actual_length and give back to
2483 if (usb_endpoint_xfer_control(&td
->urb
->ep
->desc
))
2484 ret
= process_ctrl_td(xhci
, td
, event_trb
, event
, ep
,
2486 else if (usb_endpoint_xfer_isoc(&td
->urb
->ep
->desc
))
2487 ret
= process_isoc_td(xhci
, td
, event_trb
, event
, ep
,
2490 ret
= process_bulk_intr_td(xhci
, td
, event_trb
, event
,
2495 * Do not update event ring dequeue pointer if ep->skip is set.
2496 * Will roll back to continue process missed tds.
2498 if (trb_comp_code
== COMP_MISSED_INT
|| !ep
->skip
) {
2499 inc_deq(xhci
, xhci
->event_ring
);
2504 urb_priv
= urb
->hcpriv
;
2506 xhci_urb_free_priv(urb_priv
);
2508 usb_hcd_unlink_urb_from_ep(bus_to_hcd(urb
->dev
->bus
), urb
);
2509 if ((urb
->actual_length
!= urb
->transfer_buffer_length
&&
2510 (urb
->transfer_flags
&
2511 URB_SHORT_NOT_OK
)) ||
2513 !usb_endpoint_xfer_isoc(&urb
->ep
->desc
)))
2514 xhci_dbg(xhci
, "Giveback URB %p, len = %d, "
2515 "expected = %d, status = %d\n",
2516 urb
, urb
->actual_length
,
2517 urb
->transfer_buffer_length
,
2519 spin_unlock(&xhci
->lock
);
2520 /* EHCI, UHCI, and OHCI always unconditionally set the
2521 * urb->status of an isochronous endpoint to 0.
2523 if (usb_pipetype(urb
->pipe
) == PIPE_ISOCHRONOUS
)
2525 usb_hcd_giveback_urb(bus_to_hcd(urb
->dev
->bus
), urb
, status
);
2526 spin_lock(&xhci
->lock
);
2530 * If ep->skip is set, it means there are missed tds on the
2531 * endpoint ring need to take care of.
2532 * Process them as short transfer until reach the td pointed by
2535 } while (ep
->skip
&& trb_comp_code
!= COMP_MISSED_INT
);
2541 * This function handles all OS-owned events on the event ring. It may drop
2542 * xhci->lock between event processing (e.g. to pass up port status changes).
2543 * Returns >0 for "possibly more events to process" (caller should call again),
2544 * otherwise 0 if done. In future, <0 returns should indicate error code.
2546 static int xhci_handle_event(struct xhci_hcd
*xhci
)
2548 union xhci_trb
*event
;
2549 int update_ptrs
= 1;
2552 if (!xhci
->event_ring
|| !xhci
->event_ring
->dequeue
) {
2553 xhci
->error_bitmask
|= 1 << 1;
2557 event
= xhci
->event_ring
->dequeue
;
2558 /* Does the HC or OS own the TRB? */
2559 if ((le32_to_cpu(event
->event_cmd
.flags
) & TRB_CYCLE
) !=
2560 xhci
->event_ring
->cycle_state
) {
2561 xhci
->error_bitmask
|= 1 << 2;
2566 * Barrier between reading the TRB_CYCLE (valid) flag above and any
2567 * speculative reads of the event's flags/data below.
2570 /* FIXME: Handle more event types. */
2571 switch ((le32_to_cpu(event
->event_cmd
.flags
) & TRB_TYPE_BITMASK
)) {
2572 case TRB_TYPE(TRB_COMPLETION
):
2573 handle_cmd_completion(xhci
, &event
->event_cmd
);
2575 case TRB_TYPE(TRB_PORT_STATUS
):
2576 handle_port_status(xhci
, event
);
2579 case TRB_TYPE(TRB_TRANSFER
):
2580 ret
= handle_tx_event(xhci
, &event
->trans_event
);
2582 xhci
->error_bitmask
|= 1 << 9;
2586 case TRB_TYPE(TRB_DEV_NOTE
):
2587 handle_device_notification(xhci
, event
);
2590 if ((le32_to_cpu(event
->event_cmd
.flags
) & TRB_TYPE_BITMASK
) >=
2592 handle_vendor_event(xhci
, event
);
2594 xhci
->error_bitmask
|= 1 << 3;
2596 /* Any of the above functions may drop and re-acquire the lock, so check
2597 * to make sure a watchdog timer didn't mark the host as non-responsive.
2599 if (xhci
->xhc_state
& XHCI_STATE_DYING
) {
2600 xhci_dbg(xhci
, "xHCI host dying, returning from "
2601 "event handler.\n");
2606 /* Update SW event ring dequeue pointer */
2607 inc_deq(xhci
, xhci
->event_ring
);
2609 /* Are there more items on the event ring? Caller will call us again to
2616 * xHCI spec says we can get an interrupt, and if the HC has an error condition,
2617 * we might get bad data out of the event ring. Section 4.10.2.7 has a list of
2618 * indicators of an event TRB error, but we check the status *first* to be safe.
2620 irqreturn_t
xhci_irq(struct usb_hcd
*hcd
)
2622 struct xhci_hcd
*xhci
= hcd_to_xhci(hcd
);
2625 union xhci_trb
*event_ring_deq
;
2628 spin_lock(&xhci
->lock
);
2629 /* Check if the xHC generated the interrupt, or the irq is shared */
2630 status
= readl(&xhci
->op_regs
->status
);
2631 if (status
== 0xffffffff)
2634 if (!(status
& STS_EINT
)) {
2635 spin_unlock(&xhci
->lock
);
2638 if (status
& STS_FATAL
) {
2639 xhci_warn(xhci
, "WARNING: Host System Error\n");
2642 spin_unlock(&xhci
->lock
);
2647 * Clear the op reg interrupt status first,
2648 * so we can receive interrupts from other MSI-X interrupters.
2649 * Write 1 to clear the interrupt status.
2652 writel(status
, &xhci
->op_regs
->status
);
2653 /* FIXME when MSI-X is supported and there are multiple vectors */
2654 /* Clear the MSI-X event interrupt status */
2658 /* Acknowledge the PCI interrupt */
2659 irq_pending
= readl(&xhci
->ir_set
->irq_pending
);
2660 irq_pending
|= IMAN_IP
;
2661 writel(irq_pending
, &xhci
->ir_set
->irq_pending
);
2664 if (xhci
->xhc_state
& XHCI_STATE_DYING
) {
2665 xhci_dbg(xhci
, "xHCI dying, ignoring interrupt. "
2666 "Shouldn't IRQs be disabled?\n");
2667 /* Clear the event handler busy flag (RW1C);
2668 * the event ring should be empty.
2670 temp_64
= xhci_read_64(xhci
, &xhci
->ir_set
->erst_dequeue
);
2671 xhci_write_64(xhci
, temp_64
| ERST_EHB
,
2672 &xhci
->ir_set
->erst_dequeue
);
2673 spin_unlock(&xhci
->lock
);
2678 event_ring_deq
= xhci
->event_ring
->dequeue
;
2679 /* FIXME this should be a delayed service routine
2680 * that clears the EHB.
2682 while (xhci_handle_event(xhci
) > 0) {}
2684 temp_64
= xhci_read_64(xhci
, &xhci
->ir_set
->erst_dequeue
);
2685 /* If necessary, update the HW's version of the event ring deq ptr. */
2686 if (event_ring_deq
!= xhci
->event_ring
->dequeue
) {
2687 deq
= xhci_trb_virt_to_dma(xhci
->event_ring
->deq_seg
,
2688 xhci
->event_ring
->dequeue
);
2690 xhci_warn(xhci
, "WARN something wrong with SW event "
2691 "ring dequeue ptr.\n");
2692 /* Update HC event ring dequeue pointer */
2693 temp_64
&= ERST_PTR_MASK
;
2694 temp_64
|= ((u64
) deq
& (u64
) ~ERST_PTR_MASK
);
2697 /* Clear the event handler busy flag (RW1C); event ring is empty. */
2698 temp_64
|= ERST_EHB
;
2699 xhci_write_64(xhci
, temp_64
, &xhci
->ir_set
->erst_dequeue
);
2701 spin_unlock(&xhci
->lock
);
2706 irqreturn_t
xhci_msi_irq(int irq
, void *hcd
)
2708 return xhci_irq(hcd
);
2711 /**** Endpoint Ring Operations ****/
2714 * Generic function for queueing a TRB on a ring.
2715 * The caller must have checked to make sure there's room on the ring.
2717 * @more_trbs_coming: Will you enqueue more TRBs before calling
2718 * prepare_transfer()?
2720 static void queue_trb(struct xhci_hcd
*xhci
, struct xhci_ring
*ring
,
2721 bool more_trbs_coming
,
2722 u32 field1
, u32 field2
, u32 field3
, u32 field4
)
2724 struct xhci_generic_trb
*trb
;
2726 trb
= &ring
->enqueue
->generic
;
2727 trb
->field
[0] = cpu_to_le32(field1
);
2728 trb
->field
[1] = cpu_to_le32(field2
);
2729 trb
->field
[2] = cpu_to_le32(field3
);
2730 trb
->field
[3] = cpu_to_le32(field4
);
2731 inc_enq(xhci
, ring
, more_trbs_coming
);
2735 * Does various checks on the endpoint ring, and makes it ready to queue num_trbs.
2736 * FIXME allocate segments if the ring is full.
2738 static int prepare_ring(struct xhci_hcd
*xhci
, struct xhci_ring
*ep_ring
,
2739 u32 ep_state
, unsigned int num_trbs
, gfp_t mem_flags
)
2741 unsigned int num_trbs_needed
;
2743 /* Make sure the endpoint has been added to xHC schedule */
2745 case EP_STATE_DISABLED
:
2747 * USB core changed config/interfaces without notifying us,
2748 * or hardware is reporting the wrong state.
2750 xhci_warn(xhci
, "WARN urb submitted to disabled ep\n");
2752 case EP_STATE_ERROR
:
2753 xhci_warn(xhci
, "WARN waiting for error on ep to be cleared\n");
2754 /* FIXME event handling code for error needs to clear it */
2755 /* XXX not sure if this should be -ENOENT or not */
2757 case EP_STATE_HALTED
:
2758 xhci_dbg(xhci
, "WARN halted endpoint, queueing URB anyway.\n");
2759 case EP_STATE_STOPPED
:
2760 case EP_STATE_RUNNING
:
2763 xhci_err(xhci
, "ERROR unknown endpoint state for ep\n");
2765 * FIXME issue Configure Endpoint command to try to get the HC
2766 * back into a known state.
2772 if (room_on_ring(xhci
, ep_ring
, num_trbs
))
2775 if (ep_ring
== xhci
->cmd_ring
) {
2776 xhci_err(xhci
, "Do not support expand command ring\n");
2780 xhci_dbg_trace(xhci
, trace_xhci_dbg_ring_expansion
,
2781 "ERROR no room on ep ring, try ring expansion");
2782 num_trbs_needed
= num_trbs
- ep_ring
->num_trbs_free
;
2783 if (xhci_ring_expansion(xhci
, ep_ring
, num_trbs_needed
,
2785 xhci_err(xhci
, "Ring expansion failed\n");
2790 if (enqueue_is_link_trb(ep_ring
)) {
2791 struct xhci_ring
*ring
= ep_ring
;
2792 union xhci_trb
*next
;
2794 next
= ring
->enqueue
;
2796 while (last_trb(xhci
, ring
, ring
->enq_seg
, next
)) {
2797 /* If we're not dealing with 0.95 hardware or isoc rings
2798 * on AMD 0.96 host, clear the chain bit.
2800 if (!xhci_link_trb_quirk(xhci
) &&
2801 !(ring
->type
== TYPE_ISOC
&&
2802 (xhci
->quirks
& XHCI_AMD_0x96_HOST
)))
2803 next
->link
.control
&= cpu_to_le32(~TRB_CHAIN
);
2805 next
->link
.control
|= cpu_to_le32(TRB_CHAIN
);
2808 next
->link
.control
^= cpu_to_le32(TRB_CYCLE
);
2810 /* Toggle the cycle bit after the last ring segment. */
2811 if (last_trb_on_last_seg(xhci
, ring
, ring
->enq_seg
, next
)) {
2812 ring
->cycle_state
= (ring
->cycle_state
? 0 : 1);
2814 ring
->enq_seg
= ring
->enq_seg
->next
;
2815 ring
->enqueue
= ring
->enq_seg
->trbs
;
2816 next
= ring
->enqueue
;
2823 static int prepare_transfer(struct xhci_hcd
*xhci
,
2824 struct xhci_virt_device
*xdev
,
2825 unsigned int ep_index
,
2826 unsigned int stream_id
,
2827 unsigned int num_trbs
,
2829 unsigned int td_index
,
2833 struct urb_priv
*urb_priv
;
2835 struct xhci_ring
*ep_ring
;
2836 struct xhci_ep_ctx
*ep_ctx
= xhci_get_ep_ctx(xhci
, xdev
->out_ctx
, ep_index
);
2838 ep_ring
= xhci_stream_id_to_ring(xdev
, ep_index
, stream_id
);
2840 xhci_dbg(xhci
, "Can't prepare ring for bad stream ID %u\n",
2845 ret
= prepare_ring(xhci
, ep_ring
,
2846 le32_to_cpu(ep_ctx
->ep_info
) & EP_STATE_MASK
,
2847 num_trbs
, mem_flags
);
2851 urb_priv
= urb
->hcpriv
;
2852 td
= urb_priv
->td
[td_index
];
2854 INIT_LIST_HEAD(&td
->td_list
);
2855 INIT_LIST_HEAD(&td
->cancelled_td_list
);
2857 if (td_index
== 0) {
2858 ret
= usb_hcd_link_urb_to_ep(bus_to_hcd(urb
->dev
->bus
), urb
);
2864 /* Add this TD to the tail of the endpoint ring's TD list */
2865 list_add_tail(&td
->td_list
, &ep_ring
->td_list
);
2866 td
->start_seg
= ep_ring
->enq_seg
;
2867 td
->first_trb
= ep_ring
->enqueue
;
2869 urb_priv
->td
[td_index
] = td
;
2874 static unsigned int count_sg_trbs_needed(struct xhci_hcd
*xhci
, struct urb
*urb
)
2876 int num_sgs
, num_trbs
, running_total
, temp
, i
;
2877 struct scatterlist
*sg
;
2880 num_sgs
= urb
->num_mapped_sgs
;
2881 temp
= urb
->transfer_buffer_length
;
2884 for_each_sg(urb
->sg
, sg
, num_sgs
, i
) {
2885 unsigned int len
= sg_dma_len(sg
);
2887 /* Scatter gather list entries may cross 64KB boundaries */
2888 running_total
= TRB_MAX_BUFF_SIZE
-
2889 (sg_dma_address(sg
) & (TRB_MAX_BUFF_SIZE
- 1));
2890 running_total
&= TRB_MAX_BUFF_SIZE
- 1;
2891 if (running_total
!= 0)
2894 /* How many more 64KB chunks to transfer, how many more TRBs? */
2895 while (running_total
< sg_dma_len(sg
) && running_total
< temp
) {
2897 running_total
+= TRB_MAX_BUFF_SIZE
;
2899 len
= min_t(int, len
, temp
);
2907 static void check_trb_math(struct urb
*urb
, int num_trbs
, int running_total
)
2910 dev_err(&urb
->dev
->dev
, "%s - ep %#x - Miscalculated number of "
2911 "TRBs, %d left\n", __func__
,
2912 urb
->ep
->desc
.bEndpointAddress
, num_trbs
);
2913 if (running_total
!= urb
->transfer_buffer_length
)
2914 dev_err(&urb
->dev
->dev
, "%s - ep %#x - Miscalculated tx length, "
2915 "queued %#x (%d), asked for %#x (%d)\n",
2917 urb
->ep
->desc
.bEndpointAddress
,
2918 running_total
, running_total
,
2919 urb
->transfer_buffer_length
,
2920 urb
->transfer_buffer_length
);
2923 static void giveback_first_trb(struct xhci_hcd
*xhci
, int slot_id
,
2924 unsigned int ep_index
, unsigned int stream_id
, int start_cycle
,
2925 struct xhci_generic_trb
*start_trb
)
2928 * Pass all the TRBs to the hardware at once and make sure this write
2933 start_trb
->field
[3] |= cpu_to_le32(start_cycle
);
2935 start_trb
->field
[3] &= cpu_to_le32(~TRB_CYCLE
);
2936 xhci_ring_ep_doorbell(xhci
, slot_id
, ep_index
, stream_id
);
2940 * xHCI uses normal TRBs for both bulk and interrupt. When the interrupt
2941 * endpoint is to be serviced, the xHC will consume (at most) one TD. A TD
2942 * (comprised of sg list entries) can take several service intervals to
2945 int xhci_queue_intr_tx(struct xhci_hcd
*xhci
, gfp_t mem_flags
,
2946 struct urb
*urb
, int slot_id
, unsigned int ep_index
)
2948 struct xhci_ep_ctx
*ep_ctx
= xhci_get_ep_ctx(xhci
,
2949 xhci
->devs
[slot_id
]->out_ctx
, ep_index
);
2953 xhci_interval
= EP_INTERVAL_TO_UFRAMES(le32_to_cpu(ep_ctx
->ep_info
));
2954 ep_interval
= urb
->interval
;
2955 /* Convert to microframes */
2956 if (urb
->dev
->speed
== USB_SPEED_LOW
||
2957 urb
->dev
->speed
== USB_SPEED_FULL
)
2959 /* FIXME change this to a warning and a suggestion to use the new API
2960 * to set the polling interval (once the API is added).
2962 if (xhci_interval
!= ep_interval
) {
2963 dev_dbg_ratelimited(&urb
->dev
->dev
,
2964 "Driver uses different interval (%d microframe%s) than xHCI (%d microframe%s)\n",
2965 ep_interval
, ep_interval
== 1 ? "" : "s",
2966 xhci_interval
, xhci_interval
== 1 ? "" : "s");
2967 urb
->interval
= xhci_interval
;
2968 /* Convert back to frames for LS/FS devices */
2969 if (urb
->dev
->speed
== USB_SPEED_LOW
||
2970 urb
->dev
->speed
== USB_SPEED_FULL
)
2973 return xhci_queue_bulk_tx(xhci
, mem_flags
, urb
, slot_id
, ep_index
);
2977 * The TD size is the number of bytes remaining in the TD (including this TRB),
2978 * right shifted by 10.
2979 * It must fit in bits 21:17, so it can't be bigger than 31.
2981 static u32
xhci_td_remainder(unsigned int remainder
)
2983 u32 max
= (1 << (21 - 17 + 1)) - 1;
2985 if ((remainder
>> 10) >= max
)
2988 return (remainder
>> 10) << 17;
2992 * For xHCI 1.0 host controllers, TD size is the number of max packet sized
2993 * packets remaining in the TD (*not* including this TRB).
2995 * Total TD packet count = total_packet_count =
2996 * DIV_ROUND_UP(TD size in bytes / wMaxPacketSize)
2998 * Packets transferred up to and including this TRB = packets_transferred =
2999 * rounddown(total bytes transferred including this TRB / wMaxPacketSize)
3001 * TD size = total_packet_count - packets_transferred
3003 * It must fit in bits 21:17, so it can't be bigger than 31.
3004 * The last TRB in a TD must have the TD size set to zero.
3006 static u32
xhci_v1_0_td_remainder(int running_total
, int trb_buff_len
,
3007 unsigned int total_packet_count
, struct urb
*urb
,
3008 unsigned int num_trbs_left
)
3010 int packets_transferred
;
3012 /* One TRB with a zero-length data packet. */
3013 if (num_trbs_left
== 0 || (running_total
== 0 && trb_buff_len
== 0))
3016 /* All the TRB queueing functions don't count the current TRB in
3019 packets_transferred
= (running_total
+ trb_buff_len
) /
3020 GET_MAX_PACKET(usb_endpoint_maxp(&urb
->ep
->desc
));
3022 if ((total_packet_count
- packets_transferred
) > 31)
3024 return (total_packet_count
- packets_transferred
) << 17;
3027 static int queue_bulk_sg_tx(struct xhci_hcd
*xhci
, gfp_t mem_flags
,
3028 struct urb
*urb
, int slot_id
, unsigned int ep_index
)
3030 struct xhci_ring
*ep_ring
;
3031 unsigned int num_trbs
;
3032 struct urb_priv
*urb_priv
;
3034 struct scatterlist
*sg
;
3036 int trb_buff_len
, this_sg_len
, running_total
;
3037 unsigned int total_packet_count
;
3040 bool more_trbs_coming
;
3042 struct xhci_generic_trb
*start_trb
;
3045 ep_ring
= xhci_urb_to_transfer_ring(xhci
, urb
);
3049 num_trbs
= count_sg_trbs_needed(xhci
, urb
);
3050 num_sgs
= urb
->num_mapped_sgs
;
3051 total_packet_count
= DIV_ROUND_UP(urb
->transfer_buffer_length
,
3052 usb_endpoint_maxp(&urb
->ep
->desc
));
3054 trb_buff_len
= prepare_transfer(xhci
, xhci
->devs
[slot_id
],
3055 ep_index
, urb
->stream_id
,
3056 num_trbs
, urb
, 0, mem_flags
);
3057 if (trb_buff_len
< 0)
3058 return trb_buff_len
;
3060 urb_priv
= urb
->hcpriv
;
3061 td
= urb_priv
->td
[0];
3064 * Don't give the first TRB to the hardware (by toggling the cycle bit)
3065 * until we've finished creating all the other TRBs. The ring's cycle
3066 * state may change as we enqueue the other TRBs, so save it too.
3068 start_trb
= &ep_ring
->enqueue
->generic
;
3069 start_cycle
= ep_ring
->cycle_state
;
3073 * How much data is in the first TRB?
3075 * There are three forces at work for TRB buffer pointers and lengths:
3076 * 1. We don't want to walk off the end of this sg-list entry buffer.
3077 * 2. The transfer length that the driver requested may be smaller than
3078 * the amount of memory allocated for this scatter-gather list.
3079 * 3. TRBs buffers can't cross 64KB boundaries.
3082 addr
= (u64
) sg_dma_address(sg
);
3083 this_sg_len
= sg_dma_len(sg
);
3084 trb_buff_len
= TRB_MAX_BUFF_SIZE
- (addr
& (TRB_MAX_BUFF_SIZE
- 1));
3085 trb_buff_len
= min_t(int, trb_buff_len
, this_sg_len
);
3086 if (trb_buff_len
> urb
->transfer_buffer_length
)
3087 trb_buff_len
= urb
->transfer_buffer_length
;
3090 /* Queue the first TRB, even if it's zero-length */
3093 u32 length_field
= 0;
3096 /* Don't change the cycle bit of the first TRB until later */
3099 if (start_cycle
== 0)
3102 field
|= ep_ring
->cycle_state
;
3104 /* Chain all the TRBs together; clear the chain bit in the last
3105 * TRB to indicate it's the last TRB in the chain.
3110 /* FIXME - add check for ZERO_PACKET flag before this */
3111 td
->last_trb
= ep_ring
->enqueue
;
3115 /* Only set interrupt on short packet for IN endpoints */
3116 if (usb_urb_dir_in(urb
))
3119 if (TRB_MAX_BUFF_SIZE
-
3120 (addr
& (TRB_MAX_BUFF_SIZE
- 1)) < trb_buff_len
) {
3121 xhci_warn(xhci
, "WARN: sg dma xfer crosses 64KB boundaries!\n");
3122 xhci_dbg(xhci
, "Next boundary at %#x, end dma = %#x\n",
3123 (unsigned int) (addr
+ TRB_MAX_BUFF_SIZE
) & ~(TRB_MAX_BUFF_SIZE
- 1),
3124 (unsigned int) addr
+ trb_buff_len
);
3127 /* Set the TRB length, TD size, and interrupter fields. */
3128 if (xhci
->hci_version
< 0x100) {
3129 remainder
= xhci_td_remainder(
3130 urb
->transfer_buffer_length
-
3133 remainder
= xhci_v1_0_td_remainder(running_total
,
3134 trb_buff_len
, total_packet_count
, urb
,
3137 length_field
= TRB_LEN(trb_buff_len
) |
3142 more_trbs_coming
= true;
3144 more_trbs_coming
= false;
3145 queue_trb(xhci
, ep_ring
, more_trbs_coming
,
3146 lower_32_bits(addr
),
3147 upper_32_bits(addr
),
3149 field
| TRB_TYPE(TRB_NORMAL
));
3151 running_total
+= trb_buff_len
;
3153 /* Calculate length for next transfer --
3154 * Are we done queueing all the TRBs for this sg entry?
3156 this_sg_len
-= trb_buff_len
;
3157 if (this_sg_len
== 0) {
3162 addr
= (u64
) sg_dma_address(sg
);
3163 this_sg_len
= sg_dma_len(sg
);
3165 addr
+= trb_buff_len
;
3168 trb_buff_len
= TRB_MAX_BUFF_SIZE
-
3169 (addr
& (TRB_MAX_BUFF_SIZE
- 1));
3170 trb_buff_len
= min_t(int, trb_buff_len
, this_sg_len
);
3171 if (running_total
+ trb_buff_len
> urb
->transfer_buffer_length
)
3173 urb
->transfer_buffer_length
- running_total
;
3174 } while (running_total
< urb
->transfer_buffer_length
);
3176 check_trb_math(urb
, num_trbs
, running_total
);
3177 giveback_first_trb(xhci
, slot_id
, ep_index
, urb
->stream_id
,
3178 start_cycle
, start_trb
);
3182 /* This is very similar to what ehci-q.c qtd_fill() does */
3183 int xhci_queue_bulk_tx(struct xhci_hcd
*xhci
, gfp_t mem_flags
,
3184 struct urb
*urb
, int slot_id
, unsigned int ep_index
)
3186 struct xhci_ring
*ep_ring
;
3187 struct urb_priv
*urb_priv
;
3190 struct xhci_generic_trb
*start_trb
;
3192 bool more_trbs_coming
;
3194 u32 field
, length_field
;
3196 int running_total
, trb_buff_len
, ret
;
3197 unsigned int total_packet_count
;
3201 return queue_bulk_sg_tx(xhci
, mem_flags
, urb
, slot_id
, ep_index
);
3203 ep_ring
= xhci_urb_to_transfer_ring(xhci
, urb
);
3208 /* How much data is (potentially) left before the 64KB boundary? */
3209 running_total
= TRB_MAX_BUFF_SIZE
-
3210 (urb
->transfer_dma
& (TRB_MAX_BUFF_SIZE
- 1));
3211 running_total
&= TRB_MAX_BUFF_SIZE
- 1;
3213 /* If there's some data on this 64KB chunk, or we have to send a
3214 * zero-length transfer, we need at least one TRB
3216 if (running_total
!= 0 || urb
->transfer_buffer_length
== 0)
3218 /* How many more 64KB chunks to transfer, how many more TRBs? */
3219 while (running_total
< urb
->transfer_buffer_length
) {
3221 running_total
+= TRB_MAX_BUFF_SIZE
;
3223 /* FIXME: this doesn't deal with URB_ZERO_PACKET - need one more */
3225 ret
= prepare_transfer(xhci
, xhci
->devs
[slot_id
],
3226 ep_index
, urb
->stream_id
,
3227 num_trbs
, urb
, 0, mem_flags
);
3231 urb_priv
= urb
->hcpriv
;
3232 td
= urb_priv
->td
[0];
3235 * Don't give the first TRB to the hardware (by toggling the cycle bit)
3236 * until we've finished creating all the other TRBs. The ring's cycle
3237 * state may change as we enqueue the other TRBs, so save it too.
3239 start_trb
= &ep_ring
->enqueue
->generic
;
3240 start_cycle
= ep_ring
->cycle_state
;
3243 total_packet_count
= DIV_ROUND_UP(urb
->transfer_buffer_length
,
3244 usb_endpoint_maxp(&urb
->ep
->desc
));
3245 /* How much data is in the first TRB? */
3246 addr
= (u64
) urb
->transfer_dma
;
3247 trb_buff_len
= TRB_MAX_BUFF_SIZE
-
3248 (urb
->transfer_dma
& (TRB_MAX_BUFF_SIZE
- 1));
3249 if (trb_buff_len
> urb
->transfer_buffer_length
)
3250 trb_buff_len
= urb
->transfer_buffer_length
;
3254 /* Queue the first TRB, even if it's zero-length */
3259 /* Don't change the cycle bit of the first TRB until later */
3262 if (start_cycle
== 0)
3265 field
|= ep_ring
->cycle_state
;
3267 /* Chain all the TRBs together; clear the chain bit in the last
3268 * TRB to indicate it's the last TRB in the chain.
3273 /* FIXME - add check for ZERO_PACKET flag before this */
3274 td
->last_trb
= ep_ring
->enqueue
;
3278 /* Only set interrupt on short packet for IN endpoints */
3279 if (usb_urb_dir_in(urb
))
3282 /* Set the TRB length, TD size, and interrupter fields. */
3283 if (xhci
->hci_version
< 0x100) {
3284 remainder
= xhci_td_remainder(
3285 urb
->transfer_buffer_length
-
3288 remainder
= xhci_v1_0_td_remainder(running_total
,
3289 trb_buff_len
, total_packet_count
, urb
,
3292 length_field
= TRB_LEN(trb_buff_len
) |
3297 more_trbs_coming
= true;
3299 more_trbs_coming
= false;
3300 queue_trb(xhci
, ep_ring
, more_trbs_coming
,
3301 lower_32_bits(addr
),
3302 upper_32_bits(addr
),
3304 field
| TRB_TYPE(TRB_NORMAL
));
3306 running_total
+= trb_buff_len
;
3308 /* Calculate length for next transfer */
3309 addr
+= trb_buff_len
;
3310 trb_buff_len
= urb
->transfer_buffer_length
- running_total
;
3311 if (trb_buff_len
> TRB_MAX_BUFF_SIZE
)
3312 trb_buff_len
= TRB_MAX_BUFF_SIZE
;
3313 } while (running_total
< urb
->transfer_buffer_length
);
3315 check_trb_math(urb
, num_trbs
, running_total
);
3316 giveback_first_trb(xhci
, slot_id
, ep_index
, urb
->stream_id
,
3317 start_cycle
, start_trb
);
3321 /* Caller must have locked xhci->lock */
3322 int xhci_queue_ctrl_tx(struct xhci_hcd
*xhci
, gfp_t mem_flags
,
3323 struct urb
*urb
, int slot_id
, unsigned int ep_index
)
3325 struct xhci_ring
*ep_ring
;
3328 struct usb_ctrlrequest
*setup
;
3329 struct xhci_generic_trb
*start_trb
;
3331 u32 field
, length_field
;
3332 struct urb_priv
*urb_priv
;
3335 ep_ring
= xhci_urb_to_transfer_ring(xhci
, urb
);
3340 * Need to copy setup packet into setup TRB, so we can't use the setup
3343 if (!urb
->setup_packet
)
3346 /* 1 TRB for setup, 1 for status */
3349 * Don't need to check if we need additional event data and normal TRBs,
3350 * since data in control transfers will never get bigger than 16MB
3351 * XXX: can we get a buffer that crosses 64KB boundaries?
3353 if (urb
->transfer_buffer_length
> 0)
3355 ret
= prepare_transfer(xhci
, xhci
->devs
[slot_id
],
3356 ep_index
, urb
->stream_id
,
3357 num_trbs
, urb
, 0, mem_flags
);
3361 urb_priv
= urb
->hcpriv
;
3362 td
= urb_priv
->td
[0];
3365 * Don't give the first TRB to the hardware (by toggling the cycle bit)
3366 * until we've finished creating all the other TRBs. The ring's cycle
3367 * state may change as we enqueue the other TRBs, so save it too.
3369 start_trb
= &ep_ring
->enqueue
->generic
;
3370 start_cycle
= ep_ring
->cycle_state
;
3372 /* Queue setup TRB - see section 6.4.1.2.1 */
3373 /* FIXME better way to translate setup_packet into two u32 fields? */
3374 setup
= (struct usb_ctrlrequest
*) urb
->setup_packet
;
3376 field
|= TRB_IDT
| TRB_TYPE(TRB_SETUP
);
3377 if (start_cycle
== 0)
3380 /* xHCI 1.0 6.4.1.2.1: Transfer Type field */
3381 if (xhci
->hci_version
== 0x100) {
3382 if (urb
->transfer_buffer_length
> 0) {
3383 if (setup
->bRequestType
& USB_DIR_IN
)
3384 field
|= TRB_TX_TYPE(TRB_DATA_IN
);
3386 field
|= TRB_TX_TYPE(TRB_DATA_OUT
);
3390 queue_trb(xhci
, ep_ring
, true,
3391 setup
->bRequestType
| setup
->bRequest
<< 8 | le16_to_cpu(setup
->wValue
) << 16,
3392 le16_to_cpu(setup
->wIndex
) | le16_to_cpu(setup
->wLength
) << 16,
3393 TRB_LEN(8) | TRB_INTR_TARGET(0),
3394 /* Immediate data in pointer */
3397 /* If there's data, queue data TRBs */
3398 /* Only set interrupt on short packet for IN endpoints */
3399 if (usb_urb_dir_in(urb
))
3400 field
= TRB_ISP
| TRB_TYPE(TRB_DATA
);
3402 field
= TRB_TYPE(TRB_DATA
);
3404 length_field
= TRB_LEN(urb
->transfer_buffer_length
) |
3405 xhci_td_remainder(urb
->transfer_buffer_length
) |
3407 if (urb
->transfer_buffer_length
> 0) {
3408 if (setup
->bRequestType
& USB_DIR_IN
)
3409 field
|= TRB_DIR_IN
;
3410 queue_trb(xhci
, ep_ring
, true,
3411 lower_32_bits(urb
->transfer_dma
),
3412 upper_32_bits(urb
->transfer_dma
),
3414 field
| ep_ring
->cycle_state
);
3417 /* Save the DMA address of the last TRB in the TD */
3418 td
->last_trb
= ep_ring
->enqueue
;
3420 /* Queue status TRB - see Table 7 and sections 4.11.2.2 and 6.4.1.2.3 */
3421 /* If the device sent data, the status stage is an OUT transfer */
3422 if (urb
->transfer_buffer_length
> 0 && setup
->bRequestType
& USB_DIR_IN
)
3426 queue_trb(xhci
, ep_ring
, false,
3430 /* Event on completion */
3431 field
| TRB_IOC
| TRB_TYPE(TRB_STATUS
) | ep_ring
->cycle_state
);
3433 giveback_first_trb(xhci
, slot_id
, ep_index
, 0,
3434 start_cycle
, start_trb
);
3438 static int count_isoc_trbs_needed(struct xhci_hcd
*xhci
,
3439 struct urb
*urb
, int i
)
3444 addr
= (u64
) (urb
->transfer_dma
+ urb
->iso_frame_desc
[i
].offset
);
3445 td_len
= urb
->iso_frame_desc
[i
].length
;
3447 num_trbs
= DIV_ROUND_UP(td_len
+ (addr
& (TRB_MAX_BUFF_SIZE
- 1)),
3456 * The transfer burst count field of the isochronous TRB defines the number of
3457 * bursts that are required to move all packets in this TD. Only SuperSpeed
3458 * devices can burst up to bMaxBurst number of packets per service interval.
3459 * This field is zero based, meaning a value of zero in the field means one
3460 * burst. Basically, for everything but SuperSpeed devices, this field will be
3461 * zero. Only xHCI 1.0 host controllers support this field.
3463 static unsigned int xhci_get_burst_count(struct xhci_hcd
*xhci
,
3464 struct usb_device
*udev
,
3465 struct urb
*urb
, unsigned int total_packet_count
)
3467 unsigned int max_burst
;
3469 if (xhci
->hci_version
< 0x100 || udev
->speed
!= USB_SPEED_SUPER
)
3472 max_burst
= urb
->ep
->ss_ep_comp
.bMaxBurst
;
3473 return DIV_ROUND_UP(total_packet_count
, max_burst
+ 1) - 1;
3477 * Returns the number of packets in the last "burst" of packets. This field is
3478 * valid for all speeds of devices. USB 2.0 devices can only do one "burst", so
3479 * the last burst packet count is equal to the total number of packets in the
3480 * TD. SuperSpeed endpoints can have up to 3 bursts. All but the last burst
3481 * must contain (bMaxBurst + 1) number of packets, but the last burst can
3482 * contain 1 to (bMaxBurst + 1) packets.
3484 static unsigned int xhci_get_last_burst_packet_count(struct xhci_hcd
*xhci
,
3485 struct usb_device
*udev
,
3486 struct urb
*urb
, unsigned int total_packet_count
)
3488 unsigned int max_burst
;
3489 unsigned int residue
;
3491 if (xhci
->hci_version
< 0x100)
3494 switch (udev
->speed
) {
3495 case USB_SPEED_SUPER
:
3496 /* bMaxBurst is zero based: 0 means 1 packet per burst */
3497 max_burst
= urb
->ep
->ss_ep_comp
.bMaxBurst
;
3498 residue
= total_packet_count
% (max_burst
+ 1);
3499 /* If residue is zero, the last burst contains (max_burst + 1)
3500 * number of packets, but the TLBPC field is zero-based.
3506 if (total_packet_count
== 0)
3508 return total_packet_count
- 1;
3512 /* This is for isoc transfer */
3513 static int xhci_queue_isoc_tx(struct xhci_hcd
*xhci
, gfp_t mem_flags
,
3514 struct urb
*urb
, int slot_id
, unsigned int ep_index
)
3516 struct xhci_ring
*ep_ring
;
3517 struct urb_priv
*urb_priv
;
3519 int num_tds
, trbs_per_td
;
3520 struct xhci_generic_trb
*start_trb
;
3523 u32 field
, length_field
;
3524 int running_total
, trb_buff_len
, td_len
, td_remain_len
, ret
;
3525 u64 start_addr
, addr
;
3527 bool more_trbs_coming
;
3529 ep_ring
= xhci
->devs
[slot_id
]->eps
[ep_index
].ring
;
3531 num_tds
= urb
->number_of_packets
;
3533 xhci_dbg(xhci
, "Isoc URB with zero packets?\n");
3537 start_addr
= (u64
) urb
->transfer_dma
;
3538 start_trb
= &ep_ring
->enqueue
->generic
;
3539 start_cycle
= ep_ring
->cycle_state
;
3541 urb_priv
= urb
->hcpriv
;
3542 /* Queue the first TRB, even if it's zero-length */
3543 for (i
= 0; i
< num_tds
; i
++) {
3544 unsigned int total_packet_count
;
3545 unsigned int burst_count
;
3546 unsigned int residue
;
3550 addr
= start_addr
+ urb
->iso_frame_desc
[i
].offset
;
3551 td_len
= urb
->iso_frame_desc
[i
].length
;
3552 td_remain_len
= td_len
;
3553 total_packet_count
= DIV_ROUND_UP(td_len
,
3555 usb_endpoint_maxp(&urb
->ep
->desc
)));
3556 /* A zero-length transfer still involves at least one packet. */
3557 if (total_packet_count
== 0)
3558 total_packet_count
++;
3559 burst_count
= xhci_get_burst_count(xhci
, urb
->dev
, urb
,
3560 total_packet_count
);
3561 residue
= xhci_get_last_burst_packet_count(xhci
,
3562 urb
->dev
, urb
, total_packet_count
);
3564 trbs_per_td
= count_isoc_trbs_needed(xhci
, urb
, i
);
3566 ret
= prepare_transfer(xhci
, xhci
->devs
[slot_id
], ep_index
,
3567 urb
->stream_id
, trbs_per_td
, urb
, i
, mem_flags
);
3574 td
= urb_priv
->td
[i
];
3575 for (j
= 0; j
< trbs_per_td
; j
++) {
3580 field
= TRB_TBC(burst_count
) |
3582 /* Queue the isoc TRB */
3583 field
|= TRB_TYPE(TRB_ISOC
);
3584 /* Assume URB_ISO_ASAP is set */
3587 if (start_cycle
== 0)
3590 field
|= ep_ring
->cycle_state
;
3593 /* Queue other normal TRBs */
3594 field
|= TRB_TYPE(TRB_NORMAL
);
3595 field
|= ep_ring
->cycle_state
;
3598 /* Only set interrupt on short packet for IN EPs */
3599 if (usb_urb_dir_in(urb
))
3602 /* Chain all the TRBs together; clear the chain bit in
3603 * the last TRB to indicate it's the last TRB in the
3606 if (j
< trbs_per_td
- 1) {
3608 more_trbs_coming
= true;
3610 td
->last_trb
= ep_ring
->enqueue
;
3612 if (xhci
->hci_version
== 0x100 &&
3615 /* Set BEI bit except for the last td */
3616 if (i
< num_tds
- 1)
3619 more_trbs_coming
= false;
3622 /* Calculate TRB length */
3623 trb_buff_len
= TRB_MAX_BUFF_SIZE
-
3624 (addr
& ((1 << TRB_MAX_BUFF_SHIFT
) - 1));
3625 if (trb_buff_len
> td_remain_len
)
3626 trb_buff_len
= td_remain_len
;
3628 /* Set the TRB length, TD size, & interrupter fields. */
3629 if (xhci
->hci_version
< 0x100) {
3630 remainder
= xhci_td_remainder(
3631 td_len
- running_total
);
3633 remainder
= xhci_v1_0_td_remainder(
3634 running_total
, trb_buff_len
,
3635 total_packet_count
, urb
,
3636 (trbs_per_td
- j
- 1));
3638 length_field
= TRB_LEN(trb_buff_len
) |
3642 queue_trb(xhci
, ep_ring
, more_trbs_coming
,
3643 lower_32_bits(addr
),
3644 upper_32_bits(addr
),
3647 running_total
+= trb_buff_len
;
3649 addr
+= trb_buff_len
;
3650 td_remain_len
-= trb_buff_len
;
3653 /* Check TD length */
3654 if (running_total
!= td_len
) {
3655 xhci_err(xhci
, "ISOC TD length unmatch\n");
3661 if (xhci_to_hcd(xhci
)->self
.bandwidth_isoc_reqs
== 0) {
3662 if (xhci
->quirks
& XHCI_AMD_PLL_FIX
)
3663 usb_amd_quirk_pll_disable();
3665 xhci_to_hcd(xhci
)->self
.bandwidth_isoc_reqs
++;
3667 giveback_first_trb(xhci
, slot_id
, ep_index
, urb
->stream_id
,
3668 start_cycle
, start_trb
);
3671 /* Clean up a partially enqueued isoc transfer. */
3673 for (i
--; i
>= 0; i
--)
3674 list_del_init(&urb_priv
->td
[i
]->td_list
);
3676 /* Use the first TD as a temporary variable to turn the TDs we've queued
3677 * into No-ops with a software-owned cycle bit. That way the hardware
3678 * won't accidentally start executing bogus TDs when we partially
3679 * overwrite them. td->first_trb and td->start_seg are already set.
3681 urb_priv
->td
[0]->last_trb
= ep_ring
->enqueue
;
3682 /* Every TRB except the first & last will have its cycle bit flipped. */
3683 td_to_noop(xhci
, ep_ring
, urb_priv
->td
[0], true);
3685 /* Reset the ring enqueue back to the first TRB and its cycle bit. */
3686 ep_ring
->enqueue
= urb_priv
->td
[0]->first_trb
;
3687 ep_ring
->enq_seg
= urb_priv
->td
[0]->start_seg
;
3688 ep_ring
->cycle_state
= start_cycle
;
3689 ep_ring
->num_trbs_free
= ep_ring
->num_trbs_free_temp
;
3690 usb_hcd_unlink_urb_from_ep(bus_to_hcd(urb
->dev
->bus
), urb
);
3695 * Check transfer ring to guarantee there is enough room for the urb.
3696 * Update ISO URB start_frame and interval.
3697 * Update interval as xhci_queue_intr_tx does. Just use xhci frame_index to
3698 * update the urb->start_frame by now.
3699 * Always assume URB_ISO_ASAP set, and NEVER use urb->start_frame as input.
3701 int xhci_queue_isoc_tx_prepare(struct xhci_hcd
*xhci
, gfp_t mem_flags
,
3702 struct urb
*urb
, int slot_id
, unsigned int ep_index
)
3704 struct xhci_virt_device
*xdev
;
3705 struct xhci_ring
*ep_ring
;
3706 struct xhci_ep_ctx
*ep_ctx
;
3710 int num_tds
, num_trbs
, i
;
3713 xdev
= xhci
->devs
[slot_id
];
3714 ep_ring
= xdev
->eps
[ep_index
].ring
;
3715 ep_ctx
= xhci_get_ep_ctx(xhci
, xdev
->out_ctx
, ep_index
);
3718 num_tds
= urb
->number_of_packets
;
3719 for (i
= 0; i
< num_tds
; i
++)
3720 num_trbs
+= count_isoc_trbs_needed(xhci
, urb
, i
);
3722 /* Check the ring to guarantee there is enough room for the whole urb.
3723 * Do not insert any td of the urb to the ring if the check failed.
3725 ret
= prepare_ring(xhci
, ep_ring
, le32_to_cpu(ep_ctx
->ep_info
) & EP_STATE_MASK
,
3726 num_trbs
, mem_flags
);
3730 start_frame
= readl(&xhci
->run_regs
->microframe_index
);
3731 start_frame
&= 0x3fff;
3733 urb
->start_frame
= start_frame
;
3734 if (urb
->dev
->speed
== USB_SPEED_LOW
||
3735 urb
->dev
->speed
== USB_SPEED_FULL
)
3736 urb
->start_frame
>>= 3;
3738 xhci_interval
= EP_INTERVAL_TO_UFRAMES(le32_to_cpu(ep_ctx
->ep_info
));
3739 ep_interval
= urb
->interval
;
3740 /* Convert to microframes */
3741 if (urb
->dev
->speed
== USB_SPEED_LOW
||
3742 urb
->dev
->speed
== USB_SPEED_FULL
)
3744 /* FIXME change this to a warning and a suggestion to use the new API
3745 * to set the polling interval (once the API is added).
3747 if (xhci_interval
!= ep_interval
) {
3748 dev_dbg_ratelimited(&urb
->dev
->dev
,
3749 "Driver uses different interval (%d microframe%s) than xHCI (%d microframe%s)\n",
3750 ep_interval
, ep_interval
== 1 ? "" : "s",
3751 xhci_interval
, xhci_interval
== 1 ? "" : "s");
3752 urb
->interval
= xhci_interval
;
3753 /* Convert back to frames for LS/FS devices */
3754 if (urb
->dev
->speed
== USB_SPEED_LOW
||
3755 urb
->dev
->speed
== USB_SPEED_FULL
)
3758 ep_ring
->num_trbs_free_temp
= ep_ring
->num_trbs_free
;
3760 return xhci_queue_isoc_tx(xhci
, mem_flags
, urb
, slot_id
, ep_index
);
3763 /**** Command Ring Operations ****/
3765 /* Generic function for queueing a command TRB on the command ring.
3766 * Check to make sure there's room on the command ring for one command TRB.
3767 * Also check that there's room reserved for commands that must not fail.
3768 * If this is a command that must not fail, meaning command_must_succeed = TRUE,
3769 * then only check for the number of reserved spots.
3770 * Don't decrement xhci->cmd_ring_reserved_trbs after we've queued the TRB
3771 * because the command event handler may want to resubmit a failed command.
3773 static int queue_command(struct xhci_hcd
*xhci
, struct xhci_command
*cmd
,
3774 u32 field1
, u32 field2
,
3775 u32 field3
, u32 field4
, bool command_must_succeed
)
3777 int reserved_trbs
= xhci
->cmd_ring_reserved_trbs
;
3779 if (xhci
->xhc_state
& XHCI_STATE_DYING
)
3782 if (!command_must_succeed
)
3785 ret
= prepare_ring(xhci
, xhci
->cmd_ring
, EP_STATE_RUNNING
,
3786 reserved_trbs
, GFP_ATOMIC
);
3788 xhci_err(xhci
, "ERR: No room for command on command ring\n");
3789 if (command_must_succeed
)
3790 xhci_err(xhci
, "ERR: Reserved TRB counting for "
3791 "unfailable commands failed.\n");
3795 cmd
->command_trb
= xhci
->cmd_ring
->enqueue
;
3796 list_add_tail(&cmd
->cmd_list
, &xhci
->cmd_list
);
3798 /* if there are no other commands queued we start the timeout timer */
3799 if (xhci
->cmd_list
.next
== &cmd
->cmd_list
&&
3800 !timer_pending(&xhci
->cmd_timer
)) {
3801 xhci
->current_cmd
= cmd
;
3802 mod_timer(&xhci
->cmd_timer
, jiffies
+ XHCI_CMD_DEFAULT_TIMEOUT
);
3805 queue_trb(xhci
, xhci
->cmd_ring
, false, field1
, field2
, field3
,
3806 field4
| xhci
->cmd_ring
->cycle_state
);
3810 /* Queue a slot enable or disable request on the command ring */
3811 int xhci_queue_slot_control(struct xhci_hcd
*xhci
, struct xhci_command
*cmd
,
3812 u32 trb_type
, u32 slot_id
)
3814 return queue_command(xhci
, cmd
, 0, 0, 0,
3815 TRB_TYPE(trb_type
) | SLOT_ID_FOR_TRB(slot_id
), false);
3818 /* Queue an address device command TRB */
3819 int xhci_queue_address_device(struct xhci_hcd
*xhci
, struct xhci_command
*cmd
,
3820 dma_addr_t in_ctx_ptr
, u32 slot_id
, enum xhci_setup_dev setup
)
3822 return queue_command(xhci
, cmd
, lower_32_bits(in_ctx_ptr
),
3823 upper_32_bits(in_ctx_ptr
), 0,
3824 TRB_TYPE(TRB_ADDR_DEV
) | SLOT_ID_FOR_TRB(slot_id
)
3825 | (setup
== SETUP_CONTEXT_ONLY
? TRB_BSR
: 0), false);
3828 int xhci_queue_vendor_command(struct xhci_hcd
*xhci
, struct xhci_command
*cmd
,
3829 u32 field1
, u32 field2
, u32 field3
, u32 field4
)
3831 return queue_command(xhci
, cmd
, field1
, field2
, field3
, field4
, false);
3834 /* Queue a reset device command TRB */
3835 int xhci_queue_reset_device(struct xhci_hcd
*xhci
, struct xhci_command
*cmd
,
3838 return queue_command(xhci
, cmd
, 0, 0, 0,
3839 TRB_TYPE(TRB_RESET_DEV
) | SLOT_ID_FOR_TRB(slot_id
),
3843 /* Queue a configure endpoint command TRB */
3844 int xhci_queue_configure_endpoint(struct xhci_hcd
*xhci
,
3845 struct xhci_command
*cmd
, dma_addr_t in_ctx_ptr
,
3846 u32 slot_id
, bool command_must_succeed
)
3848 return queue_command(xhci
, cmd
, lower_32_bits(in_ctx_ptr
),
3849 upper_32_bits(in_ctx_ptr
), 0,
3850 TRB_TYPE(TRB_CONFIG_EP
) | SLOT_ID_FOR_TRB(slot_id
),
3851 command_must_succeed
);
3854 /* Queue an evaluate context command TRB */
3855 int xhci_queue_evaluate_context(struct xhci_hcd
*xhci
, struct xhci_command
*cmd
,
3856 dma_addr_t in_ctx_ptr
, u32 slot_id
, bool command_must_succeed
)
3858 return queue_command(xhci
, cmd
, lower_32_bits(in_ctx_ptr
),
3859 upper_32_bits(in_ctx_ptr
), 0,
3860 TRB_TYPE(TRB_EVAL_CONTEXT
) | SLOT_ID_FOR_TRB(slot_id
),
3861 command_must_succeed
);
3865 * Suspend is set to indicate "Stop Endpoint Command" is being issued to stop
3866 * activity on an endpoint that is about to be suspended.
3868 int xhci_queue_stop_endpoint(struct xhci_hcd
*xhci
, struct xhci_command
*cmd
,
3869 int slot_id
, unsigned int ep_index
, int suspend
)
3871 u32 trb_slot_id
= SLOT_ID_FOR_TRB(slot_id
);
3872 u32 trb_ep_index
= EP_ID_FOR_TRB(ep_index
);
3873 u32 type
= TRB_TYPE(TRB_STOP_RING
);
3874 u32 trb_suspend
= SUSPEND_PORT_FOR_TRB(suspend
);
3876 return queue_command(xhci
, cmd
, 0, 0, 0,
3877 trb_slot_id
| trb_ep_index
| type
| trb_suspend
, false);
3880 /* Set Transfer Ring Dequeue Pointer command */
3881 void xhci_queue_new_dequeue_state(struct xhci_hcd
*xhci
,
3882 unsigned int slot_id
, unsigned int ep_index
,
3883 unsigned int stream_id
,
3884 struct xhci_dequeue_state
*deq_state
)
3887 u32 trb_slot_id
= SLOT_ID_FOR_TRB(slot_id
);
3888 u32 trb_ep_index
= EP_ID_FOR_TRB(ep_index
);
3889 u32 trb_stream_id
= STREAM_ID_FOR_TRB(stream_id
);
3891 u32 type
= TRB_TYPE(TRB_SET_DEQ
);
3892 struct xhci_virt_ep
*ep
;
3893 struct xhci_command
*cmd
;
3896 xhci_dbg_trace(xhci
, trace_xhci_dbg_cancel_urb
,
3897 "Set TR Deq Ptr cmd, new deq seg = %p (0x%llx dma), new deq ptr = %p (0x%llx dma), new cycle = %u",
3898 deq_state
->new_deq_seg
,
3899 (unsigned long long)deq_state
->new_deq_seg
->dma
,
3900 deq_state
->new_deq_ptr
,
3901 (unsigned long long)xhci_trb_virt_to_dma(
3902 deq_state
->new_deq_seg
, deq_state
->new_deq_ptr
),
3903 deq_state
->new_cycle_state
);
3905 addr
= xhci_trb_virt_to_dma(deq_state
->new_deq_seg
,
3906 deq_state
->new_deq_ptr
);
3908 xhci_warn(xhci
, "WARN Cannot submit Set TR Deq Ptr\n");
3909 xhci_warn(xhci
, "WARN deq seg = %p, deq pt = %p\n",
3910 deq_state
->new_deq_seg
, deq_state
->new_deq_ptr
);
3913 ep
= &xhci
->devs
[slot_id
]->eps
[ep_index
];
3914 if ((ep
->ep_state
& SET_DEQ_PENDING
)) {
3915 xhci_warn(xhci
, "WARN Cannot submit Set TR Deq Ptr\n");
3916 xhci_warn(xhci
, "A Set TR Deq Ptr command is pending.\n");
3920 /* This function gets called from contexts where it cannot sleep */
3921 cmd
= xhci_alloc_command(xhci
, false, false, GFP_ATOMIC
);
3923 xhci_warn(xhci
, "WARN Cannot submit Set TR Deq Ptr: ENOMEM\n");
3927 ep
->queued_deq_seg
= deq_state
->new_deq_seg
;
3928 ep
->queued_deq_ptr
= deq_state
->new_deq_ptr
;
3930 trb_sct
= SCT_FOR_TRB(SCT_PRI_TR
);
3931 ret
= queue_command(xhci
, cmd
,
3932 lower_32_bits(addr
) | trb_sct
| deq_state
->new_cycle_state
,
3933 upper_32_bits(addr
), trb_stream_id
,
3934 trb_slot_id
| trb_ep_index
| type
, false);
3936 xhci_free_command(xhci
, cmd
);
3940 /* Stop the TD queueing code from ringing the doorbell until
3941 * this command completes. The HC won't set the dequeue pointer
3942 * if the ring is running, and ringing the doorbell starts the
3945 ep
->ep_state
|= SET_DEQ_PENDING
;
3948 int xhci_queue_reset_ep(struct xhci_hcd
*xhci
, struct xhci_command
*cmd
,
3949 int slot_id
, unsigned int ep_index
)
3951 u32 trb_slot_id
= SLOT_ID_FOR_TRB(slot_id
);
3952 u32 trb_ep_index
= EP_ID_FOR_TRB(ep_index
);
3953 u32 type
= TRB_TYPE(TRB_RESET_EP
);
3955 return queue_command(xhci
, cmd
, 0, 0, 0,
3956 trb_slot_id
| trb_ep_index
| type
, false);