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.
23 #include <linux/usb.h>
24 #include <linux/pci.h>
25 #include <linux/slab.h>
26 #include <linux/dmapool.h>
31 * Allocates a generic ring segment from the ring pool, sets the dma address,
32 * initializes the segment to zero, and sets the private next pointer to NULL.
35 * "All components of all Command and Transfer TRBs shall be initialized to '0'"
37 static struct xhci_segment
*xhci_segment_alloc(struct xhci_hcd
*xhci
,
38 unsigned int cycle_state
, gfp_t flags
)
40 struct xhci_segment
*seg
;
44 seg
= kzalloc(sizeof *seg
, flags
);
48 seg
->trbs
= dma_pool_alloc(xhci
->segment_pool
, flags
, &dma
);
54 memset(seg
->trbs
, 0, TRB_SEGMENT_SIZE
);
55 /* If the cycle state is 0, set the cycle bit to 1 for all the TRBs */
56 if (cycle_state
== 0) {
57 for (i
= 0; i
< TRBS_PER_SEGMENT
; i
++)
58 seg
->trbs
[i
].link
.control
|= TRB_CYCLE
;
66 static void xhci_segment_free(struct xhci_hcd
*xhci
, struct xhci_segment
*seg
)
69 dma_pool_free(xhci
->segment_pool
, seg
->trbs
, seg
->dma
);
75 static void xhci_free_segments_for_ring(struct xhci_hcd
*xhci
,
76 struct xhci_segment
*first
)
78 struct xhci_segment
*seg
;
81 while (seg
!= first
) {
82 struct xhci_segment
*next
= seg
->next
;
83 xhci_segment_free(xhci
, seg
);
86 xhci_segment_free(xhci
, first
);
90 * Make the prev segment point to the next segment.
92 * Change the last TRB in the prev segment to be a Link TRB which points to the
93 * DMA address of the next segment. The caller needs to set any Link TRB
94 * related flags, such as End TRB, Toggle Cycle, and no snoop.
96 static void xhci_link_segments(struct xhci_hcd
*xhci
, struct xhci_segment
*prev
,
97 struct xhci_segment
*next
, enum xhci_ring_type type
)
104 if (type
!= TYPE_EVENT
) {
105 prev
->trbs
[TRBS_PER_SEGMENT
-1].link
.segment_ptr
=
106 cpu_to_le64(next
->dma
);
108 /* Set the last TRB in the segment to have a TRB type ID of Link TRB */
109 val
= le32_to_cpu(prev
->trbs
[TRBS_PER_SEGMENT
-1].link
.control
);
110 val
&= ~TRB_TYPE_BITMASK
;
111 val
|= TRB_TYPE(TRB_LINK
);
112 /* Always set the chain bit with 0.95 hardware */
113 /* Set chain bit for isoc rings on AMD 0.96 host */
114 if (xhci_link_trb_quirk(xhci
) ||
115 (type
== TYPE_ISOC
&&
116 (xhci
->quirks
& XHCI_AMD_0x96_HOST
)))
118 prev
->trbs
[TRBS_PER_SEGMENT
-1].link
.control
= cpu_to_le32(val
);
123 * Link the ring to the new segments.
124 * Set Toggle Cycle for the new ring if needed.
126 static void xhci_link_rings(struct xhci_hcd
*xhci
, struct xhci_ring
*ring
,
127 struct xhci_segment
*first
, struct xhci_segment
*last
,
128 unsigned int num_segs
)
130 struct xhci_segment
*next
;
132 if (!ring
|| !first
|| !last
)
135 next
= ring
->enq_seg
->next
;
136 xhci_link_segments(xhci
, ring
->enq_seg
, first
, ring
->type
);
137 xhci_link_segments(xhci
, last
, next
, ring
->type
);
138 ring
->num_segs
+= num_segs
;
139 ring
->num_trbs_free
+= (TRBS_PER_SEGMENT
- 1) * num_segs
;
141 if (ring
->type
!= TYPE_EVENT
&& ring
->enq_seg
== ring
->last_seg
) {
142 ring
->last_seg
->trbs
[TRBS_PER_SEGMENT
-1].link
.control
143 &= ~cpu_to_le32(LINK_TOGGLE
);
144 last
->trbs
[TRBS_PER_SEGMENT
-1].link
.control
145 |= cpu_to_le32(LINK_TOGGLE
);
146 ring
->last_seg
= last
;
150 /* XXX: Do we need the hcd structure in all these functions? */
151 void xhci_ring_free(struct xhci_hcd
*xhci
, struct xhci_ring
*ring
)
157 xhci_free_segments_for_ring(xhci
, ring
->first_seg
);
162 static void xhci_initialize_ring_info(struct xhci_ring
*ring
,
163 unsigned int cycle_state
)
165 /* The ring is empty, so the enqueue pointer == dequeue pointer */
166 ring
->enqueue
= ring
->first_seg
->trbs
;
167 ring
->enq_seg
= ring
->first_seg
;
168 ring
->dequeue
= ring
->enqueue
;
169 ring
->deq_seg
= ring
->first_seg
;
170 /* The ring is initialized to 0. The producer must write 1 to the cycle
171 * bit to handover ownership of the TRB, so PCS = 1. The consumer must
172 * compare CCS to the cycle bit to check ownership, so CCS = 1.
174 * New rings are initialized with cycle state equal to 1; if we are
175 * handling ring expansion, set the cycle state equal to the old ring.
177 ring
->cycle_state
= cycle_state
;
178 /* Not necessary for new rings, but needed for re-initialized rings */
179 ring
->enq_updates
= 0;
180 ring
->deq_updates
= 0;
183 * Each segment has a link TRB, and leave an extra TRB for SW
186 ring
->num_trbs_free
= ring
->num_segs
* (TRBS_PER_SEGMENT
- 1) - 1;
189 /* Allocate segments and link them for a ring */
190 static int xhci_alloc_segments_for_ring(struct xhci_hcd
*xhci
,
191 struct xhci_segment
**first
, struct xhci_segment
**last
,
192 unsigned int num_segs
, unsigned int cycle_state
,
193 enum xhci_ring_type type
, gfp_t flags
)
195 struct xhci_segment
*prev
;
197 prev
= xhci_segment_alloc(xhci
, cycle_state
, flags
);
203 while (num_segs
> 0) {
204 struct xhci_segment
*next
;
206 next
= xhci_segment_alloc(xhci
, cycle_state
, flags
);
211 xhci_segment_free(xhci
, prev
);
216 xhci_link_segments(xhci
, prev
, next
, type
);
221 xhci_link_segments(xhci
, prev
, *first
, type
);
228 * Create a new ring with zero or more segments.
230 * Link each segment together into a ring.
231 * Set the end flag and the cycle toggle bit on the last segment.
232 * See section 4.9.1 and figures 15 and 16.
234 static struct xhci_ring
*xhci_ring_alloc(struct xhci_hcd
*xhci
,
235 unsigned int num_segs
, unsigned int cycle_state
,
236 enum xhci_ring_type type
, gfp_t flags
)
238 struct xhci_ring
*ring
;
241 ring
= kzalloc(sizeof *(ring
), flags
);
245 ring
->num_segs
= num_segs
;
246 INIT_LIST_HEAD(&ring
->td_list
);
251 ret
= xhci_alloc_segments_for_ring(xhci
, &ring
->first_seg
,
252 &ring
->last_seg
, num_segs
, cycle_state
, type
, flags
);
256 /* Only event ring does not use link TRB */
257 if (type
!= TYPE_EVENT
) {
258 /* See section 4.9.2.1 and 6.4.4.1 */
259 ring
->last_seg
->trbs
[TRBS_PER_SEGMENT
- 1].link
.control
|=
260 cpu_to_le32(LINK_TOGGLE
);
262 xhci_initialize_ring_info(ring
, cycle_state
);
270 void xhci_free_or_cache_endpoint_ring(struct xhci_hcd
*xhci
,
271 struct xhci_virt_device
*virt_dev
,
272 unsigned int ep_index
)
276 rings_cached
= virt_dev
->num_rings_cached
;
277 if (rings_cached
< XHCI_MAX_RINGS_CACHED
) {
278 virt_dev
->ring_cache
[rings_cached
] =
279 virt_dev
->eps
[ep_index
].ring
;
280 virt_dev
->num_rings_cached
++;
281 xhci_dbg(xhci
, "Cached old ring, "
282 "%d ring%s cached\n",
283 virt_dev
->num_rings_cached
,
284 (virt_dev
->num_rings_cached
> 1) ? "s" : "");
286 xhci_ring_free(xhci
, virt_dev
->eps
[ep_index
].ring
);
287 xhci_dbg(xhci
, "Ring cache full (%d rings), "
289 virt_dev
->num_rings_cached
);
291 virt_dev
->eps
[ep_index
].ring
= NULL
;
294 /* Zero an endpoint ring (except for link TRBs) and move the enqueue and dequeue
295 * pointers to the beginning of the ring.
297 static void xhci_reinit_cached_ring(struct xhci_hcd
*xhci
,
298 struct xhci_ring
*ring
, unsigned int cycle_state
,
299 enum xhci_ring_type type
)
301 struct xhci_segment
*seg
= ring
->first_seg
;
306 sizeof(union xhci_trb
)*TRBS_PER_SEGMENT
);
307 if (cycle_state
== 0) {
308 for (i
= 0; i
< TRBS_PER_SEGMENT
; i
++)
309 seg
->trbs
[i
].link
.control
|= TRB_CYCLE
;
311 /* All endpoint rings have link TRBs */
312 xhci_link_segments(xhci
, seg
, seg
->next
, type
);
314 } while (seg
!= ring
->first_seg
);
316 xhci_initialize_ring_info(ring
, cycle_state
);
317 /* td list should be empty since all URBs have been cancelled,
318 * but just in case...
320 INIT_LIST_HEAD(&ring
->td_list
);
324 * Expand an existing ring.
325 * Look for a cached ring or allocate a new ring which has same segment numbers
326 * and link the two rings.
328 int xhci_ring_expansion(struct xhci_hcd
*xhci
, struct xhci_ring
*ring
,
329 unsigned int num_trbs
, gfp_t flags
)
331 struct xhci_segment
*first
;
332 struct xhci_segment
*last
;
333 unsigned int num_segs
;
334 unsigned int num_segs_needed
;
337 num_segs_needed
= (num_trbs
+ (TRBS_PER_SEGMENT
- 1) - 1) /
338 (TRBS_PER_SEGMENT
- 1);
340 /* Allocate number of segments we needed, or double the ring size */
341 num_segs
= ring
->num_segs
> num_segs_needed
?
342 ring
->num_segs
: num_segs_needed
;
344 ret
= xhci_alloc_segments_for_ring(xhci
, &first
, &last
,
345 num_segs
, ring
->cycle_state
, ring
->type
, flags
);
349 xhci_link_rings(xhci
, ring
, first
, last
, num_segs
);
350 xhci_dbg(xhci
, "ring expansion succeed, now has %d segments\n",
356 #define CTX_SIZE(_hcc) (HCC_64BYTE_CONTEXT(_hcc) ? 64 : 32)
358 static struct xhci_container_ctx
*xhci_alloc_container_ctx(struct xhci_hcd
*xhci
,
359 int type
, gfp_t flags
)
361 struct xhci_container_ctx
*ctx
;
363 if ((type
!= XHCI_CTX_TYPE_DEVICE
) && (type
!= XHCI_CTX_TYPE_INPUT
))
366 ctx
= kzalloc(sizeof(*ctx
), flags
);
371 ctx
->size
= HCC_64BYTE_CONTEXT(xhci
->hcc_params
) ? 2048 : 1024;
372 if (type
== XHCI_CTX_TYPE_INPUT
)
373 ctx
->size
+= CTX_SIZE(xhci
->hcc_params
);
375 ctx
->bytes
= dma_pool_alloc(xhci
->device_pool
, flags
, &ctx
->dma
);
380 memset(ctx
->bytes
, 0, ctx
->size
);
384 static void xhci_free_container_ctx(struct xhci_hcd
*xhci
,
385 struct xhci_container_ctx
*ctx
)
389 dma_pool_free(xhci
->device_pool
, ctx
->bytes
, ctx
->dma
);
393 struct xhci_input_control_ctx
*xhci_get_input_control_ctx(struct xhci_hcd
*xhci
,
394 struct xhci_container_ctx
*ctx
)
396 if (ctx
->type
!= XHCI_CTX_TYPE_INPUT
)
399 return (struct xhci_input_control_ctx
*)ctx
->bytes
;
402 struct xhci_slot_ctx
*xhci_get_slot_ctx(struct xhci_hcd
*xhci
,
403 struct xhci_container_ctx
*ctx
)
405 if (ctx
->type
== XHCI_CTX_TYPE_DEVICE
)
406 return (struct xhci_slot_ctx
*)ctx
->bytes
;
408 return (struct xhci_slot_ctx
*)
409 (ctx
->bytes
+ CTX_SIZE(xhci
->hcc_params
));
412 struct xhci_ep_ctx
*xhci_get_ep_ctx(struct xhci_hcd
*xhci
,
413 struct xhci_container_ctx
*ctx
,
414 unsigned int ep_index
)
416 /* increment ep index by offset of start of ep ctx array */
418 if (ctx
->type
== XHCI_CTX_TYPE_INPUT
)
421 return (struct xhci_ep_ctx
*)
422 (ctx
->bytes
+ (ep_index
* CTX_SIZE(xhci
->hcc_params
)));
426 /***************** Streams structures manipulation *************************/
428 static void xhci_free_stream_ctx(struct xhci_hcd
*xhci
,
429 unsigned int num_stream_ctxs
,
430 struct xhci_stream_ctx
*stream_ctx
, dma_addr_t dma
)
432 struct pci_dev
*pdev
= to_pci_dev(xhci_to_hcd(xhci
)->self
.controller
);
434 if (num_stream_ctxs
> MEDIUM_STREAM_ARRAY_SIZE
)
435 dma_free_coherent(&pdev
->dev
,
436 sizeof(struct xhci_stream_ctx
)*num_stream_ctxs
,
438 else if (num_stream_ctxs
<= SMALL_STREAM_ARRAY_SIZE
)
439 return dma_pool_free(xhci
->small_streams_pool
,
442 return dma_pool_free(xhci
->medium_streams_pool
,
447 * The stream context array for each endpoint with bulk streams enabled can
448 * vary in size, based on:
449 * - how many streams the endpoint supports,
450 * - the maximum primary stream array size the host controller supports,
451 * - and how many streams the device driver asks for.
453 * The stream context array must be a power of 2, and can be as small as
454 * 64 bytes or as large as 1MB.
456 static struct xhci_stream_ctx
*xhci_alloc_stream_ctx(struct xhci_hcd
*xhci
,
457 unsigned int num_stream_ctxs
, dma_addr_t
*dma
,
460 struct pci_dev
*pdev
= to_pci_dev(xhci_to_hcd(xhci
)->self
.controller
);
462 if (num_stream_ctxs
> MEDIUM_STREAM_ARRAY_SIZE
)
463 return dma_alloc_coherent(&pdev
->dev
,
464 sizeof(struct xhci_stream_ctx
)*num_stream_ctxs
,
466 else if (num_stream_ctxs
<= SMALL_STREAM_ARRAY_SIZE
)
467 return dma_pool_alloc(xhci
->small_streams_pool
,
470 return dma_pool_alloc(xhci
->medium_streams_pool
,
474 struct xhci_ring
*xhci_dma_to_transfer_ring(
475 struct xhci_virt_ep
*ep
,
478 if (ep
->ep_state
& EP_HAS_STREAMS
)
479 return radix_tree_lookup(&ep
->stream_info
->trb_address_map
,
480 address
>> TRB_SEGMENT_SHIFT
);
484 /* Only use this when you know stream_info is valid */
485 #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
486 static struct xhci_ring
*dma_to_stream_ring(
487 struct xhci_stream_info
*stream_info
,
490 return radix_tree_lookup(&stream_info
->trb_address_map
,
491 address
>> TRB_SEGMENT_SHIFT
);
493 #endif /* CONFIG_USB_XHCI_HCD_DEBUGGING */
495 struct xhci_ring
*xhci_stream_id_to_ring(
496 struct xhci_virt_device
*dev
,
497 unsigned int ep_index
,
498 unsigned int stream_id
)
500 struct xhci_virt_ep
*ep
= &dev
->eps
[ep_index
];
504 if (!ep
->stream_info
)
507 if (stream_id
> ep
->stream_info
->num_streams
)
509 return ep
->stream_info
->stream_rings
[stream_id
];
512 #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
513 static int xhci_test_radix_tree(struct xhci_hcd
*xhci
,
514 unsigned int num_streams
,
515 struct xhci_stream_info
*stream_info
)
518 struct xhci_ring
*cur_ring
;
521 for (cur_stream
= 1; cur_stream
< num_streams
; cur_stream
++) {
522 struct xhci_ring
*mapped_ring
;
523 int trb_size
= sizeof(union xhci_trb
);
525 cur_ring
= stream_info
->stream_rings
[cur_stream
];
526 for (addr
= cur_ring
->first_seg
->dma
;
527 addr
< cur_ring
->first_seg
->dma
+ TRB_SEGMENT_SIZE
;
529 mapped_ring
= dma_to_stream_ring(stream_info
, addr
);
530 if (cur_ring
!= mapped_ring
) {
531 xhci_warn(xhci
, "WARN: DMA address 0x%08llx "
532 "didn't map to stream ID %u; "
533 "mapped to ring %p\n",
534 (unsigned long long) addr
,
540 /* One TRB after the end of the ring segment shouldn't return a
541 * pointer to the current ring (although it may be a part of a
544 mapped_ring
= dma_to_stream_ring(stream_info
, addr
);
545 if (mapped_ring
!= cur_ring
) {
546 /* One TRB before should also fail */
547 addr
= cur_ring
->first_seg
->dma
- trb_size
;
548 mapped_ring
= dma_to_stream_ring(stream_info
, addr
);
550 if (mapped_ring
== cur_ring
) {
551 xhci_warn(xhci
, "WARN: Bad DMA address 0x%08llx "
552 "mapped to valid stream ID %u; "
553 "mapped ring = %p\n",
554 (unsigned long long) addr
,
562 #endif /* CONFIG_USB_XHCI_HCD_DEBUGGING */
565 * Change an endpoint's internal structure so it supports stream IDs. The
566 * number of requested streams includes stream 0, which cannot be used by device
569 * The number of stream contexts in the stream context array may be bigger than
570 * the number of streams the driver wants to use. This is because the number of
571 * stream context array entries must be a power of two.
573 * We need a radix tree for mapping physical addresses of TRBs to which stream
574 * ID they belong to. We need to do this because the host controller won't tell
575 * us which stream ring the TRB came from. We could store the stream ID in an
576 * event data TRB, but that doesn't help us for the cancellation case, since the
577 * endpoint may stop before it reaches that event data TRB.
579 * The radix tree maps the upper portion of the TRB DMA address to a ring
580 * segment that has the same upper portion of DMA addresses. For example, say I
581 * have segments of size 1KB, that are always 64-byte aligned. A segment may
582 * start at 0x10c91000 and end at 0x10c913f0. If I use the upper 10 bits, the
583 * key to the stream ID is 0x43244. I can use the DMA address of the TRB to
584 * pass the radix tree a key to get the right stream ID:
586 * 0x10c90fff >> 10 = 0x43243
587 * 0x10c912c0 >> 10 = 0x43244
588 * 0x10c91400 >> 10 = 0x43245
590 * Obviously, only those TRBs with DMA addresses that are within the segment
591 * will make the radix tree return the stream ID for that ring.
593 * Caveats for the radix tree:
595 * The radix tree uses an unsigned long as a key pair. On 32-bit systems, an
596 * unsigned long will be 32-bits; on a 64-bit system an unsigned long will be
597 * 64-bits. Since we only request 32-bit DMA addresses, we can use that as the
598 * key on 32-bit or 64-bit systems (it would also be fine if we asked for 64-bit
599 * PCI DMA addresses on a 64-bit system). There might be a problem on 32-bit
600 * extended systems (where the DMA address can be bigger than 32-bits),
601 * if we allow the PCI dma mask to be bigger than 32-bits. So don't do that.
603 struct xhci_stream_info
*xhci_alloc_stream_info(struct xhci_hcd
*xhci
,
604 unsigned int num_stream_ctxs
,
605 unsigned int num_streams
, gfp_t mem_flags
)
607 struct xhci_stream_info
*stream_info
;
609 struct xhci_ring
*cur_ring
;
614 xhci_dbg(xhci
, "Allocating %u streams and %u "
615 "stream context array entries.\n",
616 num_streams
, num_stream_ctxs
);
617 if (xhci
->cmd_ring_reserved_trbs
== MAX_RSVD_CMD_TRBS
) {
618 xhci_dbg(xhci
, "Command ring has no reserved TRBs available\n");
621 xhci
->cmd_ring_reserved_trbs
++;
623 stream_info
= kzalloc(sizeof(struct xhci_stream_info
), mem_flags
);
627 stream_info
->num_streams
= num_streams
;
628 stream_info
->num_stream_ctxs
= num_stream_ctxs
;
630 /* Initialize the array of virtual pointers to stream rings. */
631 stream_info
->stream_rings
= kzalloc(
632 sizeof(struct xhci_ring
*)*num_streams
,
634 if (!stream_info
->stream_rings
)
637 /* Initialize the array of DMA addresses for stream rings for the HW. */
638 stream_info
->stream_ctx_array
= xhci_alloc_stream_ctx(xhci
,
639 num_stream_ctxs
, &stream_info
->ctx_array_dma
,
641 if (!stream_info
->stream_ctx_array
)
643 memset(stream_info
->stream_ctx_array
, 0,
644 sizeof(struct xhci_stream_ctx
)*num_stream_ctxs
);
646 /* Allocate everything needed to free the stream rings later */
647 stream_info
->free_streams_command
=
648 xhci_alloc_command(xhci
, true, true, mem_flags
);
649 if (!stream_info
->free_streams_command
)
652 INIT_RADIX_TREE(&stream_info
->trb_address_map
, GFP_ATOMIC
);
654 /* Allocate rings for all the streams that the driver will use,
655 * and add their segment DMA addresses to the radix tree.
656 * Stream 0 is reserved.
658 for (cur_stream
= 1; cur_stream
< num_streams
; cur_stream
++) {
659 stream_info
->stream_rings
[cur_stream
] =
660 xhci_ring_alloc(xhci
, 2, 1, TYPE_STREAM
, mem_flags
);
661 cur_ring
= stream_info
->stream_rings
[cur_stream
];
664 cur_ring
->stream_id
= cur_stream
;
665 /* Set deq ptr, cycle bit, and stream context type */
666 addr
= cur_ring
->first_seg
->dma
|
667 SCT_FOR_CTX(SCT_PRI_TR
) |
668 cur_ring
->cycle_state
;
669 stream_info
->stream_ctx_array
[cur_stream
].stream_ring
=
671 xhci_dbg(xhci
, "Setting stream %d ring ptr to 0x%08llx\n",
672 cur_stream
, (unsigned long long) addr
);
674 key
= (unsigned long)
675 (cur_ring
->first_seg
->dma
>> TRB_SEGMENT_SHIFT
);
676 ret
= radix_tree_insert(&stream_info
->trb_address_map
,
679 xhci_ring_free(xhci
, cur_ring
);
680 stream_info
->stream_rings
[cur_stream
] = NULL
;
684 /* Leave the other unused stream ring pointers in the stream context
685 * array initialized to zero. This will cause the xHC to give us an
686 * error if the device asks for a stream ID we don't have setup (if it
687 * was any other way, the host controller would assume the ring is
688 * "empty" and wait forever for data to be queued to that stream ID).
691 /* Do a little test on the radix tree to make sure it returns the
694 if (xhci_test_radix_tree(xhci
, num_streams
, stream_info
))
701 for (cur_stream
= 1; cur_stream
< num_streams
; cur_stream
++) {
702 cur_ring
= stream_info
->stream_rings
[cur_stream
];
704 addr
= cur_ring
->first_seg
->dma
;
705 radix_tree_delete(&stream_info
->trb_address_map
,
706 addr
>> TRB_SEGMENT_SHIFT
);
707 xhci_ring_free(xhci
, cur_ring
);
708 stream_info
->stream_rings
[cur_stream
] = NULL
;
711 xhci_free_command(xhci
, stream_info
->free_streams_command
);
713 kfree(stream_info
->stream_rings
);
717 xhci
->cmd_ring_reserved_trbs
--;
721 * Sets the MaxPStreams field and the Linear Stream Array field.
722 * Sets the dequeue pointer to the stream context array.
724 void xhci_setup_streams_ep_input_ctx(struct xhci_hcd
*xhci
,
725 struct xhci_ep_ctx
*ep_ctx
,
726 struct xhci_stream_info
*stream_info
)
728 u32 max_primary_streams
;
729 /* MaxPStreams is the number of stream context array entries, not the
730 * number we're actually using. Must be in 2^(MaxPstreams + 1) format.
731 * fls(0) = 0, fls(0x1) = 1, fls(0x10) = 2, fls(0x100) = 3, etc.
733 max_primary_streams
= fls(stream_info
->num_stream_ctxs
) - 2;
734 xhci_dbg(xhci
, "Setting number of stream ctx array entries to %u\n",
735 1 << (max_primary_streams
+ 1));
736 ep_ctx
->ep_info
&= cpu_to_le32(~EP_MAXPSTREAMS_MASK
);
737 ep_ctx
->ep_info
|= cpu_to_le32(EP_MAXPSTREAMS(max_primary_streams
)
739 ep_ctx
->deq
= cpu_to_le64(stream_info
->ctx_array_dma
);
743 * Sets the MaxPStreams field and the Linear Stream Array field to 0.
744 * Reinstalls the "normal" endpoint ring (at its previous dequeue mark,
745 * not at the beginning of the ring).
747 void xhci_setup_no_streams_ep_input_ctx(struct xhci_hcd
*xhci
,
748 struct xhci_ep_ctx
*ep_ctx
,
749 struct xhci_virt_ep
*ep
)
752 ep_ctx
->ep_info
&= cpu_to_le32(~(EP_MAXPSTREAMS_MASK
| EP_HAS_LSA
));
753 addr
= xhci_trb_virt_to_dma(ep
->ring
->deq_seg
, ep
->ring
->dequeue
);
754 ep_ctx
->deq
= cpu_to_le64(addr
| ep
->ring
->cycle_state
);
757 /* Frees all stream contexts associated with the endpoint,
759 * Caller should fix the endpoint context streams fields.
761 void xhci_free_stream_info(struct xhci_hcd
*xhci
,
762 struct xhci_stream_info
*stream_info
)
765 struct xhci_ring
*cur_ring
;
771 for (cur_stream
= 1; cur_stream
< stream_info
->num_streams
;
773 cur_ring
= stream_info
->stream_rings
[cur_stream
];
775 addr
= cur_ring
->first_seg
->dma
;
776 radix_tree_delete(&stream_info
->trb_address_map
,
777 addr
>> TRB_SEGMENT_SHIFT
);
778 xhci_ring_free(xhci
, cur_ring
);
779 stream_info
->stream_rings
[cur_stream
] = NULL
;
782 xhci_free_command(xhci
, stream_info
->free_streams_command
);
783 xhci
->cmd_ring_reserved_trbs
--;
784 if (stream_info
->stream_ctx_array
)
785 xhci_free_stream_ctx(xhci
,
786 stream_info
->num_stream_ctxs
,
787 stream_info
->stream_ctx_array
,
788 stream_info
->ctx_array_dma
);
791 kfree(stream_info
->stream_rings
);
796 /***************** Device context manipulation *************************/
798 static void xhci_init_endpoint_timer(struct xhci_hcd
*xhci
,
799 struct xhci_virt_ep
*ep
)
801 init_timer(&ep
->stop_cmd_timer
);
802 ep
->stop_cmd_timer
.data
= (unsigned long) ep
;
803 ep
->stop_cmd_timer
.function
= xhci_stop_endpoint_command_watchdog
;
807 static void xhci_free_tt_info(struct xhci_hcd
*xhci
,
808 struct xhci_virt_device
*virt_dev
,
811 struct list_head
*tt_list_head
;
812 struct xhci_tt_bw_info
*tt_info
, *next
;
813 bool slot_found
= false;
815 /* If the device never made it past the Set Address stage,
816 * it may not have the real_port set correctly.
818 if (virt_dev
->real_port
== 0 ||
819 virt_dev
->real_port
> HCS_MAX_PORTS(xhci
->hcs_params1
)) {
820 xhci_dbg(xhci
, "Bad real port.\n");
824 tt_list_head
= &(xhci
->rh_bw
[virt_dev
->real_port
- 1].tts
);
825 list_for_each_entry_safe(tt_info
, next
, tt_list_head
, tt_list
) {
826 /* Multi-TT hubs will have more than one entry */
827 if (tt_info
->slot_id
== slot_id
) {
829 list_del(&tt_info
->tt_list
);
831 } else if (slot_found
) {
837 int xhci_alloc_tt_info(struct xhci_hcd
*xhci
,
838 struct xhci_virt_device
*virt_dev
,
839 struct usb_device
*hdev
,
840 struct usb_tt
*tt
, gfp_t mem_flags
)
842 struct xhci_tt_bw_info
*tt_info
;
843 unsigned int num_ports
;
849 num_ports
= hdev
->maxchild
;
851 for (i
= 0; i
< num_ports
; i
++, tt_info
++) {
852 struct xhci_interval_bw_table
*bw_table
;
854 tt_info
= kzalloc(sizeof(*tt_info
), mem_flags
);
857 INIT_LIST_HEAD(&tt_info
->tt_list
);
858 list_add(&tt_info
->tt_list
,
859 &xhci
->rh_bw
[virt_dev
->real_port
- 1].tts
);
860 tt_info
->slot_id
= virt_dev
->udev
->slot_id
;
862 tt_info
->ttport
= i
+1;
863 bw_table
= &tt_info
->bw_table
;
864 for (j
= 0; j
< XHCI_MAX_INTERVAL
; j
++)
865 INIT_LIST_HEAD(&bw_table
->interval_bw
[j
].endpoints
);
870 xhci_free_tt_info(xhci
, virt_dev
, virt_dev
->udev
->slot_id
);
875 /* All the xhci_tds in the ring's TD list should be freed at this point.
876 * Should be called with xhci->lock held if there is any chance the TT lists
877 * will be manipulated by the configure endpoint, allocate device, or update
878 * hub functions while this function is removing the TT entries from the list.
880 void xhci_free_virt_device(struct xhci_hcd
*xhci
, int slot_id
)
882 struct xhci_virt_device
*dev
;
884 int old_active_eps
= 0;
886 /* Slot ID 0 is reserved */
887 if (slot_id
== 0 || !xhci
->devs
[slot_id
])
890 dev
= xhci
->devs
[slot_id
];
891 xhci
->dcbaa
->dev_context_ptrs
[slot_id
] = 0;
896 old_active_eps
= dev
->tt_info
->active_eps
;
898 for (i
= 0; i
< 31; ++i
) {
899 if (dev
->eps
[i
].ring
)
900 xhci_ring_free(xhci
, dev
->eps
[i
].ring
);
901 if (dev
->eps
[i
].stream_info
)
902 xhci_free_stream_info(xhci
,
903 dev
->eps
[i
].stream_info
);
904 /* Endpoints on the TT/root port lists should have been removed
905 * when usb_disable_device() was called for the device.
906 * We can't drop them anyway, because the udev might have gone
907 * away by this point, and we can't tell what speed it was.
909 if (!list_empty(&dev
->eps
[i
].bw_endpoint_list
))
910 xhci_warn(xhci
, "Slot %u endpoint %u "
911 "not removed from BW list!\n",
914 /* If this is a hub, free the TT(s) from the TT list */
915 xhci_free_tt_info(xhci
, dev
, slot_id
);
916 /* If necessary, update the number of active TTs on this root port */
917 xhci_update_tt_active_eps(xhci
, dev
, old_active_eps
);
919 if (dev
->ring_cache
) {
920 for (i
= 0; i
< dev
->num_rings_cached
; i
++)
921 xhci_ring_free(xhci
, dev
->ring_cache
[i
]);
922 kfree(dev
->ring_cache
);
926 xhci_free_container_ctx(xhci
, dev
->in_ctx
);
928 xhci_free_container_ctx(xhci
, dev
->out_ctx
);
930 kfree(xhci
->devs
[slot_id
]);
931 xhci
->devs
[slot_id
] = NULL
;
934 int xhci_alloc_virt_device(struct xhci_hcd
*xhci
, int slot_id
,
935 struct usb_device
*udev
, gfp_t flags
)
937 struct xhci_virt_device
*dev
;
940 /* Slot ID 0 is reserved */
941 if (slot_id
== 0 || xhci
->devs
[slot_id
]) {
942 xhci_warn(xhci
, "Bad Slot ID %d\n", slot_id
);
946 xhci
->devs
[slot_id
] = kzalloc(sizeof(*xhci
->devs
[slot_id
]), flags
);
947 if (!xhci
->devs
[slot_id
])
949 dev
= xhci
->devs
[slot_id
];
951 /* Allocate the (output) device context that will be used in the HC. */
952 dev
->out_ctx
= xhci_alloc_container_ctx(xhci
, XHCI_CTX_TYPE_DEVICE
, flags
);
956 xhci_dbg(xhci
, "Slot %d output ctx = 0x%llx (dma)\n", slot_id
,
957 (unsigned long long)dev
->out_ctx
->dma
);
959 /* Allocate the (input) device context for address device command */
960 dev
->in_ctx
= xhci_alloc_container_ctx(xhci
, XHCI_CTX_TYPE_INPUT
, flags
);
964 xhci_dbg(xhci
, "Slot %d input ctx = 0x%llx (dma)\n", slot_id
,
965 (unsigned long long)dev
->in_ctx
->dma
);
967 /* Initialize the cancellation list and watchdog timers for each ep */
968 for (i
= 0; i
< 31; i
++) {
969 xhci_init_endpoint_timer(xhci
, &dev
->eps
[i
]);
970 INIT_LIST_HEAD(&dev
->eps
[i
].cancelled_td_list
);
971 INIT_LIST_HEAD(&dev
->eps
[i
].bw_endpoint_list
);
974 /* Allocate endpoint 0 ring */
975 dev
->eps
[0].ring
= xhci_ring_alloc(xhci
, 2, 1, TYPE_CTRL
, flags
);
976 if (!dev
->eps
[0].ring
)
979 /* Allocate pointers to the ring cache */
980 dev
->ring_cache
= kzalloc(
981 sizeof(struct xhci_ring
*)*XHCI_MAX_RINGS_CACHED
,
983 if (!dev
->ring_cache
)
985 dev
->num_rings_cached
= 0;
987 init_completion(&dev
->cmd_completion
);
988 INIT_LIST_HEAD(&dev
->cmd_list
);
991 /* Point to output device context in dcbaa. */
992 xhci
->dcbaa
->dev_context_ptrs
[slot_id
] = cpu_to_le64(dev
->out_ctx
->dma
);
993 xhci_dbg(xhci
, "Set slot id %d dcbaa entry %p to 0x%llx\n",
995 &xhci
->dcbaa
->dev_context_ptrs
[slot_id
],
996 le64_to_cpu(xhci
->dcbaa
->dev_context_ptrs
[slot_id
]));
1000 xhci_free_virt_device(xhci
, slot_id
);
1004 void xhci_copy_ep0_dequeue_into_input_ctx(struct xhci_hcd
*xhci
,
1005 struct usb_device
*udev
)
1007 struct xhci_virt_device
*virt_dev
;
1008 struct xhci_ep_ctx
*ep0_ctx
;
1009 struct xhci_ring
*ep_ring
;
1011 virt_dev
= xhci
->devs
[udev
->slot_id
];
1012 ep0_ctx
= xhci_get_ep_ctx(xhci
, virt_dev
->in_ctx
, 0);
1013 ep_ring
= virt_dev
->eps
[0].ring
;
1015 * FIXME we don't keep track of the dequeue pointer very well after a
1016 * Set TR dequeue pointer, so we're setting the dequeue pointer of the
1017 * host to our enqueue pointer. This should only be called after a
1018 * configured device has reset, so all control transfers should have
1019 * been completed or cancelled before the reset.
1021 ep0_ctx
->deq
= cpu_to_le64(xhci_trb_virt_to_dma(ep_ring
->enq_seg
,
1023 | ep_ring
->cycle_state
);
1027 * The xHCI roothub may have ports of differing speeds in any order in the port
1028 * status registers. xhci->port_array provides an array of the port speed for
1029 * each offset into the port status registers.
1031 * The xHCI hardware wants to know the roothub port number that the USB device
1032 * is attached to (or the roothub port its ancestor hub is attached to). All we
1033 * know is the index of that port under either the USB 2.0 or the USB 3.0
1034 * roothub, but that doesn't give us the real index into the HW port status
1035 * registers. Call xhci_find_raw_port_number() to get real index.
1037 static u32
xhci_find_real_port_number(struct xhci_hcd
*xhci
,
1038 struct usb_device
*udev
)
1040 struct usb_device
*top_dev
;
1041 struct usb_hcd
*hcd
;
1043 if (udev
->speed
== USB_SPEED_SUPER
)
1044 hcd
= xhci
->shared_hcd
;
1046 hcd
= xhci
->main_hcd
;
1048 for (top_dev
= udev
; top_dev
->parent
&& top_dev
->parent
->parent
;
1049 top_dev
= top_dev
->parent
)
1050 /* Found device below root hub */;
1052 return xhci_find_raw_port_number(hcd
, top_dev
->portnum
);
1055 /* Setup an xHCI virtual device for a Set Address command */
1056 int xhci_setup_addressable_virt_dev(struct xhci_hcd
*xhci
, struct usb_device
*udev
)
1058 struct xhci_virt_device
*dev
;
1059 struct xhci_ep_ctx
*ep0_ctx
;
1060 struct xhci_slot_ctx
*slot_ctx
;
1063 struct usb_device
*top_dev
;
1065 dev
= xhci
->devs
[udev
->slot_id
];
1066 /* Slot ID 0 is reserved */
1067 if (udev
->slot_id
== 0 || !dev
) {
1068 xhci_warn(xhci
, "Slot ID %d is not assigned to this device\n",
1072 ep0_ctx
= xhci_get_ep_ctx(xhci
, dev
->in_ctx
, 0);
1073 slot_ctx
= xhci_get_slot_ctx(xhci
, dev
->in_ctx
);
1075 /* 3) Only the control endpoint is valid - one endpoint context */
1076 slot_ctx
->dev_info
|= cpu_to_le32(LAST_CTX(1) | udev
->route
);
1077 switch (udev
->speed
) {
1078 case USB_SPEED_SUPER
:
1079 slot_ctx
->dev_info
|= cpu_to_le32(SLOT_SPEED_SS
);
1080 max_packets
= MAX_PACKET(512);
1082 case USB_SPEED_HIGH
:
1083 slot_ctx
->dev_info
|= cpu_to_le32(SLOT_SPEED_HS
);
1084 max_packets
= MAX_PACKET(64);
1086 /* USB core guesses at a 64-byte max packet first for FS devices */
1087 case USB_SPEED_FULL
:
1088 slot_ctx
->dev_info
|= cpu_to_le32(SLOT_SPEED_FS
);
1089 max_packets
= MAX_PACKET(64);
1092 slot_ctx
->dev_info
|= cpu_to_le32(SLOT_SPEED_LS
);
1093 max_packets
= MAX_PACKET(8);
1095 case USB_SPEED_WIRELESS
:
1096 xhci_dbg(xhci
, "FIXME xHCI doesn't support wireless speeds\n");
1100 /* Speed was set earlier, this shouldn't happen. */
1103 /* Find the root hub port this device is under */
1104 port_num
= xhci_find_real_port_number(xhci
, udev
);
1107 slot_ctx
->dev_info2
|= cpu_to_le32(ROOT_HUB_PORT(port_num
));
1108 /* Set the port number in the virtual_device to the faked port number */
1109 for (top_dev
= udev
; top_dev
->parent
&& top_dev
->parent
->parent
;
1110 top_dev
= top_dev
->parent
)
1111 /* Found device below root hub */;
1112 dev
->fake_port
= top_dev
->portnum
;
1113 dev
->real_port
= port_num
;
1114 xhci_dbg(xhci
, "Set root hub portnum to %d\n", port_num
);
1115 xhci_dbg(xhci
, "Set fake root hub portnum to %d\n", dev
->fake_port
);
1117 /* Find the right bandwidth table that this device will be a part of.
1118 * If this is a full speed device attached directly to a root port (or a
1119 * decendent of one), it counts as a primary bandwidth domain, not a
1120 * secondary bandwidth domain under a TT. An xhci_tt_info structure
1121 * will never be created for the HS root hub.
1123 if (!udev
->tt
|| !udev
->tt
->hub
->parent
) {
1124 dev
->bw_table
= &xhci
->rh_bw
[port_num
- 1].bw_table
;
1126 struct xhci_root_port_bw_info
*rh_bw
;
1127 struct xhci_tt_bw_info
*tt_bw
;
1129 rh_bw
= &xhci
->rh_bw
[port_num
- 1];
1130 /* Find the right TT. */
1131 list_for_each_entry(tt_bw
, &rh_bw
->tts
, tt_list
) {
1132 if (tt_bw
->slot_id
!= udev
->tt
->hub
->slot_id
)
1135 if (!dev
->udev
->tt
->multi
||
1137 tt_bw
->ttport
== dev
->udev
->ttport
)) {
1138 dev
->bw_table
= &tt_bw
->bw_table
;
1139 dev
->tt_info
= tt_bw
;
1144 xhci_warn(xhci
, "WARN: Didn't find a matching TT\n");
1147 /* Is this a LS/FS device under an external HS hub? */
1148 if (udev
->tt
&& udev
->tt
->hub
->parent
) {
1149 slot_ctx
->tt_info
= cpu_to_le32(udev
->tt
->hub
->slot_id
|
1150 (udev
->ttport
<< 8));
1151 if (udev
->tt
->multi
)
1152 slot_ctx
->dev_info
|= cpu_to_le32(DEV_MTT
);
1154 xhci_dbg(xhci
, "udev->tt = %p\n", udev
->tt
);
1155 xhci_dbg(xhci
, "udev->ttport = 0x%x\n", udev
->ttport
);
1157 /* Step 4 - ring already allocated */
1159 ep0_ctx
->ep_info2
= cpu_to_le32(EP_TYPE(CTRL_EP
));
1161 /* EP 0 can handle "burst" sizes of 1, so Max Burst Size field is 0 */
1162 ep0_ctx
->ep_info2
|= cpu_to_le32(MAX_BURST(0) | ERROR_COUNT(3) |
1165 ep0_ctx
->deq
= cpu_to_le64(dev
->eps
[0].ring
->first_seg
->dma
|
1166 dev
->eps
[0].ring
->cycle_state
);
1168 /* Steps 7 and 8 were done in xhci_alloc_virt_device() */
1174 * Convert interval expressed as 2^(bInterval - 1) == interval into
1175 * straight exponent value 2^n == interval.
1178 static unsigned int xhci_parse_exponent_interval(struct usb_device
*udev
,
1179 struct usb_host_endpoint
*ep
)
1181 unsigned int interval
;
1183 interval
= clamp_val(ep
->desc
.bInterval
, 1, 16) - 1;
1184 if (interval
!= ep
->desc
.bInterval
- 1)
1185 dev_warn(&udev
->dev
,
1186 "ep %#x - rounding interval to %d %sframes\n",
1187 ep
->desc
.bEndpointAddress
,
1189 udev
->speed
== USB_SPEED_FULL
? "" : "micro");
1191 if (udev
->speed
== USB_SPEED_FULL
) {
1193 * Full speed isoc endpoints specify interval in frames,
1194 * not microframes. We are using microframes everywhere,
1195 * so adjust accordingly.
1197 interval
+= 3; /* 1 frame = 2^3 uframes */
1204 * Convert bInterval expressed in microframes (in 1-255 range) to exponent of
1205 * microframes, rounded down to nearest power of 2.
1207 static unsigned int xhci_microframes_to_exponent(struct usb_device
*udev
,
1208 struct usb_host_endpoint
*ep
, unsigned int desc_interval
,
1209 unsigned int min_exponent
, unsigned int max_exponent
)
1211 unsigned int interval
;
1213 interval
= fls(desc_interval
) - 1;
1214 interval
= clamp_val(interval
, min_exponent
, max_exponent
);
1215 if ((1 << interval
) != desc_interval
)
1216 dev_warn(&udev
->dev
,
1217 "ep %#x - rounding interval to %d microframes, ep desc says %d microframes\n",
1218 ep
->desc
.bEndpointAddress
,
1225 static unsigned int xhci_parse_microframe_interval(struct usb_device
*udev
,
1226 struct usb_host_endpoint
*ep
)
1228 if (ep
->desc
.bInterval
== 0)
1230 return xhci_microframes_to_exponent(udev
, ep
,
1231 ep
->desc
.bInterval
, 0, 15);
1235 static unsigned int xhci_parse_frame_interval(struct usb_device
*udev
,
1236 struct usb_host_endpoint
*ep
)
1238 return xhci_microframes_to_exponent(udev
, ep
,
1239 ep
->desc
.bInterval
* 8, 3, 10);
1242 /* Return the polling or NAK interval.
1244 * The polling interval is expressed in "microframes". If xHCI's Interval field
1245 * is set to N, it will service the endpoint every 2^(Interval)*125us.
1247 * The NAK interval is one NAK per 1 to 255 microframes, or no NAKs if interval
1250 static unsigned int xhci_get_endpoint_interval(struct usb_device
*udev
,
1251 struct usb_host_endpoint
*ep
)
1253 unsigned int interval
= 0;
1255 switch (udev
->speed
) {
1256 case USB_SPEED_HIGH
:
1258 if (usb_endpoint_xfer_control(&ep
->desc
) ||
1259 usb_endpoint_xfer_bulk(&ep
->desc
)) {
1260 interval
= xhci_parse_microframe_interval(udev
, ep
);
1263 /* Fall through - SS and HS isoc/int have same decoding */
1265 case USB_SPEED_SUPER
:
1266 if (usb_endpoint_xfer_int(&ep
->desc
) ||
1267 usb_endpoint_xfer_isoc(&ep
->desc
)) {
1268 interval
= xhci_parse_exponent_interval(udev
, ep
);
1272 case USB_SPEED_FULL
:
1273 if (usb_endpoint_xfer_isoc(&ep
->desc
)) {
1274 interval
= xhci_parse_exponent_interval(udev
, ep
);
1278 * Fall through for interrupt endpoint interval decoding
1279 * since it uses the same rules as low speed interrupt
1284 if (usb_endpoint_xfer_int(&ep
->desc
) ||
1285 usb_endpoint_xfer_isoc(&ep
->desc
)) {
1287 interval
= xhci_parse_frame_interval(udev
, ep
);
1294 return EP_INTERVAL(interval
);
1297 /* The "Mult" field in the endpoint context is only set for SuperSpeed isoc eps.
1298 * High speed endpoint descriptors can define "the number of additional
1299 * transaction opportunities per microframe", but that goes in the Max Burst
1300 * endpoint context field.
1302 static u32
xhci_get_endpoint_mult(struct usb_device
*udev
,
1303 struct usb_host_endpoint
*ep
)
1305 if (udev
->speed
!= USB_SPEED_SUPER
||
1306 !usb_endpoint_xfer_isoc(&ep
->desc
))
1308 return ep
->ss_ep_comp
.bmAttributes
;
1311 static u32
xhci_get_endpoint_type(struct usb_device
*udev
,
1312 struct usb_host_endpoint
*ep
)
1317 in
= usb_endpoint_dir_in(&ep
->desc
);
1318 if (usb_endpoint_xfer_control(&ep
->desc
)) {
1319 type
= EP_TYPE(CTRL_EP
);
1320 } else if (usb_endpoint_xfer_bulk(&ep
->desc
)) {
1322 type
= EP_TYPE(BULK_IN_EP
);
1324 type
= EP_TYPE(BULK_OUT_EP
);
1325 } else if (usb_endpoint_xfer_isoc(&ep
->desc
)) {
1327 type
= EP_TYPE(ISOC_IN_EP
);
1329 type
= EP_TYPE(ISOC_OUT_EP
);
1330 } else if (usb_endpoint_xfer_int(&ep
->desc
)) {
1332 type
= EP_TYPE(INT_IN_EP
);
1334 type
= EP_TYPE(INT_OUT_EP
);
1341 /* Return the maximum endpoint service interval time (ESIT) payload.
1342 * Basically, this is the maxpacket size, multiplied by the burst size
1345 static u32
xhci_get_max_esit_payload(struct xhci_hcd
*xhci
,
1346 struct usb_device
*udev
,
1347 struct usb_host_endpoint
*ep
)
1352 /* Only applies for interrupt or isochronous endpoints */
1353 if (usb_endpoint_xfer_control(&ep
->desc
) ||
1354 usb_endpoint_xfer_bulk(&ep
->desc
))
1357 if (udev
->speed
== USB_SPEED_SUPER
)
1358 return le16_to_cpu(ep
->ss_ep_comp
.wBytesPerInterval
);
1360 max_packet
= GET_MAX_PACKET(usb_endpoint_maxp(&ep
->desc
));
1361 max_burst
= (usb_endpoint_maxp(&ep
->desc
) & 0x1800) >> 11;
1362 /* A 0 in max burst means 1 transfer per ESIT */
1363 return max_packet
* (max_burst
+ 1);
1366 /* Set up an endpoint with one ring segment. Do not allocate stream rings.
1367 * Drivers will have to call usb_alloc_streams() to do that.
1369 int xhci_endpoint_init(struct xhci_hcd
*xhci
,
1370 struct xhci_virt_device
*virt_dev
,
1371 struct usb_device
*udev
,
1372 struct usb_host_endpoint
*ep
,
1375 unsigned int ep_index
;
1376 struct xhci_ep_ctx
*ep_ctx
;
1377 struct xhci_ring
*ep_ring
;
1378 unsigned int max_packet
;
1379 unsigned int max_burst
;
1380 enum xhci_ring_type type
;
1381 u32 max_esit_payload
;
1384 ep_index
= xhci_get_endpoint_index(&ep
->desc
);
1385 ep_ctx
= xhci_get_ep_ctx(xhci
, virt_dev
->in_ctx
, ep_index
);
1387 endpoint_type
= xhci_get_endpoint_type(udev
, ep
);
1390 ep_ctx
->ep_info2
= cpu_to_le32(endpoint_type
);
1392 type
= usb_endpoint_type(&ep
->desc
);
1393 /* Set up the endpoint ring */
1394 virt_dev
->eps
[ep_index
].new_ring
=
1395 xhci_ring_alloc(xhci
, 2, 1, type
, mem_flags
);
1396 if (!virt_dev
->eps
[ep_index
].new_ring
) {
1397 /* Attempt to use the ring cache */
1398 if (virt_dev
->num_rings_cached
== 0)
1400 virt_dev
->eps
[ep_index
].new_ring
=
1401 virt_dev
->ring_cache
[virt_dev
->num_rings_cached
];
1402 virt_dev
->ring_cache
[virt_dev
->num_rings_cached
] = NULL
;
1403 virt_dev
->num_rings_cached
--;
1404 xhci_reinit_cached_ring(xhci
, virt_dev
->eps
[ep_index
].new_ring
,
1407 virt_dev
->eps
[ep_index
].skip
= false;
1408 ep_ring
= virt_dev
->eps
[ep_index
].new_ring
;
1409 ep_ctx
->deq
= cpu_to_le64(ep_ring
->first_seg
->dma
| ep_ring
->cycle_state
);
1411 ep_ctx
->ep_info
= cpu_to_le32(xhci_get_endpoint_interval(udev
, ep
)
1412 | EP_MULT(xhci_get_endpoint_mult(udev
, ep
)));
1414 /* FIXME dig Mult and streams info out of ep companion desc */
1416 /* Allow 3 retries for everything but isoc;
1417 * CErr shall be set to 0 for Isoch endpoints.
1419 if (!usb_endpoint_xfer_isoc(&ep
->desc
))
1420 ep_ctx
->ep_info2
|= cpu_to_le32(ERROR_COUNT(3));
1422 ep_ctx
->ep_info2
|= cpu_to_le32(ERROR_COUNT(0));
1424 /* Set the max packet size and max burst */
1425 max_packet
= GET_MAX_PACKET(usb_endpoint_maxp(&ep
->desc
));
1427 switch (udev
->speed
) {
1428 case USB_SPEED_SUPER
:
1429 /* dig out max burst from ep companion desc */
1430 max_burst
= ep
->ss_ep_comp
.bMaxBurst
;
1432 case USB_SPEED_HIGH
:
1433 /* Some devices get this wrong */
1434 if (usb_endpoint_xfer_bulk(&ep
->desc
))
1436 /* bits 11:12 specify the number of additional transaction
1437 * opportunities per microframe (USB 2.0, section 9.6.6)
1439 if (usb_endpoint_xfer_isoc(&ep
->desc
) ||
1440 usb_endpoint_xfer_int(&ep
->desc
)) {
1441 max_burst
= (usb_endpoint_maxp(&ep
->desc
)
1445 case USB_SPEED_FULL
:
1451 ep_ctx
->ep_info2
|= cpu_to_le32(MAX_PACKET(max_packet
) |
1452 MAX_BURST(max_burst
));
1453 max_esit_payload
= xhci_get_max_esit_payload(xhci
, udev
, ep
);
1454 ep_ctx
->tx_info
= cpu_to_le32(MAX_ESIT_PAYLOAD_FOR_EP(max_esit_payload
));
1457 * XXX no idea how to calculate the average TRB buffer length for bulk
1458 * endpoints, as the driver gives us no clue how big each scatter gather
1459 * list entry (or buffer) is going to be.
1461 * For isochronous and interrupt endpoints, we set it to the max
1462 * available, until we have new API in the USB core to allow drivers to
1463 * declare how much bandwidth they actually need.
1465 * Normally, it would be calculated by taking the total of the buffer
1466 * lengths in the TD and then dividing by the number of TRBs in a TD,
1467 * including link TRBs, No-op TRBs, and Event data TRBs. Since we don't
1468 * use Event Data TRBs, and we don't chain in a link TRB on short
1469 * transfers, we're basically dividing by 1.
1471 * xHCI 1.0 specification indicates that the Average TRB Length should
1472 * be set to 8 for control endpoints.
1474 if (usb_endpoint_xfer_control(&ep
->desc
) && xhci
->hci_version
== 0x100)
1475 ep_ctx
->tx_info
|= cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(8));
1478 cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(max_esit_payload
));
1480 /* FIXME Debug endpoint context */
1484 void xhci_endpoint_zero(struct xhci_hcd
*xhci
,
1485 struct xhci_virt_device
*virt_dev
,
1486 struct usb_host_endpoint
*ep
)
1488 unsigned int ep_index
;
1489 struct xhci_ep_ctx
*ep_ctx
;
1491 ep_index
= xhci_get_endpoint_index(&ep
->desc
);
1492 ep_ctx
= xhci_get_ep_ctx(xhci
, virt_dev
->in_ctx
, ep_index
);
1494 ep_ctx
->ep_info
= 0;
1495 ep_ctx
->ep_info2
= 0;
1497 ep_ctx
->tx_info
= 0;
1498 /* Don't free the endpoint ring until the set interface or configuration
1503 void xhci_clear_endpoint_bw_info(struct xhci_bw_info
*bw_info
)
1505 bw_info
->ep_interval
= 0;
1507 bw_info
->num_packets
= 0;
1508 bw_info
->max_packet_size
= 0;
1510 bw_info
->max_esit_payload
= 0;
1513 void xhci_update_bw_info(struct xhci_hcd
*xhci
,
1514 struct xhci_container_ctx
*in_ctx
,
1515 struct xhci_input_control_ctx
*ctrl_ctx
,
1516 struct xhci_virt_device
*virt_dev
)
1518 struct xhci_bw_info
*bw_info
;
1519 struct xhci_ep_ctx
*ep_ctx
;
1520 unsigned int ep_type
;
1523 for (i
= 1; i
< 31; ++i
) {
1524 bw_info
= &virt_dev
->eps
[i
].bw_info
;
1526 /* We can't tell what endpoint type is being dropped, but
1527 * unconditionally clearing the bandwidth info for non-periodic
1528 * endpoints should be harmless because the info will never be
1529 * set in the first place.
1531 if (!EP_IS_ADDED(ctrl_ctx
, i
) && EP_IS_DROPPED(ctrl_ctx
, i
)) {
1532 /* Dropped endpoint */
1533 xhci_clear_endpoint_bw_info(bw_info
);
1537 if (EP_IS_ADDED(ctrl_ctx
, i
)) {
1538 ep_ctx
= xhci_get_ep_ctx(xhci
, in_ctx
, i
);
1539 ep_type
= CTX_TO_EP_TYPE(le32_to_cpu(ep_ctx
->ep_info2
));
1541 /* Ignore non-periodic endpoints */
1542 if (ep_type
!= ISOC_OUT_EP
&& ep_type
!= INT_OUT_EP
&&
1543 ep_type
!= ISOC_IN_EP
&&
1544 ep_type
!= INT_IN_EP
)
1547 /* Added or changed endpoint */
1548 bw_info
->ep_interval
= CTX_TO_EP_INTERVAL(
1549 le32_to_cpu(ep_ctx
->ep_info
));
1550 /* Number of packets and mult are zero-based in the
1551 * input context, but we want one-based for the
1554 bw_info
->mult
= CTX_TO_EP_MULT(
1555 le32_to_cpu(ep_ctx
->ep_info
)) + 1;
1556 bw_info
->num_packets
= CTX_TO_MAX_BURST(
1557 le32_to_cpu(ep_ctx
->ep_info2
)) + 1;
1558 bw_info
->max_packet_size
= MAX_PACKET_DECODED(
1559 le32_to_cpu(ep_ctx
->ep_info2
));
1560 bw_info
->type
= ep_type
;
1561 bw_info
->max_esit_payload
= CTX_TO_MAX_ESIT_PAYLOAD(
1562 le32_to_cpu(ep_ctx
->tx_info
));
1567 /* Copy output xhci_ep_ctx to the input xhci_ep_ctx copy.
1568 * Useful when you want to change one particular aspect of the endpoint and then
1569 * issue a configure endpoint command.
1571 void xhci_endpoint_copy(struct xhci_hcd
*xhci
,
1572 struct xhci_container_ctx
*in_ctx
,
1573 struct xhci_container_ctx
*out_ctx
,
1574 unsigned int ep_index
)
1576 struct xhci_ep_ctx
*out_ep_ctx
;
1577 struct xhci_ep_ctx
*in_ep_ctx
;
1579 out_ep_ctx
= xhci_get_ep_ctx(xhci
, out_ctx
, ep_index
);
1580 in_ep_ctx
= xhci_get_ep_ctx(xhci
, in_ctx
, ep_index
);
1582 in_ep_ctx
->ep_info
= out_ep_ctx
->ep_info
;
1583 in_ep_ctx
->ep_info2
= out_ep_ctx
->ep_info2
;
1584 in_ep_ctx
->deq
= out_ep_ctx
->deq
;
1585 in_ep_ctx
->tx_info
= out_ep_ctx
->tx_info
;
1588 /* Copy output xhci_slot_ctx to the input xhci_slot_ctx.
1589 * Useful when you want to change one particular aspect of the endpoint and then
1590 * issue a configure endpoint command. Only the context entries field matters,
1591 * but we'll copy the whole thing anyway.
1593 void xhci_slot_copy(struct xhci_hcd
*xhci
,
1594 struct xhci_container_ctx
*in_ctx
,
1595 struct xhci_container_ctx
*out_ctx
)
1597 struct xhci_slot_ctx
*in_slot_ctx
;
1598 struct xhci_slot_ctx
*out_slot_ctx
;
1600 in_slot_ctx
= xhci_get_slot_ctx(xhci
, in_ctx
);
1601 out_slot_ctx
= xhci_get_slot_ctx(xhci
, out_ctx
);
1603 in_slot_ctx
->dev_info
= out_slot_ctx
->dev_info
;
1604 in_slot_ctx
->dev_info2
= out_slot_ctx
->dev_info2
;
1605 in_slot_ctx
->tt_info
= out_slot_ctx
->tt_info
;
1606 in_slot_ctx
->dev_state
= out_slot_ctx
->dev_state
;
1609 /* Set up the scratchpad buffer array and scratchpad buffers, if needed. */
1610 static int scratchpad_alloc(struct xhci_hcd
*xhci
, gfp_t flags
)
1613 struct device
*dev
= xhci_to_hcd(xhci
)->self
.controller
;
1614 int num_sp
= HCS_MAX_SCRATCHPAD(xhci
->hcs_params2
);
1616 xhci_dbg(xhci
, "Allocating %d scratchpad buffers\n", num_sp
);
1621 xhci
->scratchpad
= kzalloc(sizeof(*xhci
->scratchpad
), flags
);
1622 if (!xhci
->scratchpad
)
1625 xhci
->scratchpad
->sp_array
= dma_alloc_coherent(dev
,
1626 num_sp
* sizeof(u64
),
1627 &xhci
->scratchpad
->sp_dma
, flags
);
1628 if (!xhci
->scratchpad
->sp_array
)
1631 xhci
->scratchpad
->sp_buffers
= kzalloc(sizeof(void *) * num_sp
, flags
);
1632 if (!xhci
->scratchpad
->sp_buffers
)
1635 xhci
->scratchpad
->sp_dma_buffers
=
1636 kzalloc(sizeof(dma_addr_t
) * num_sp
, flags
);
1638 if (!xhci
->scratchpad
->sp_dma_buffers
)
1641 xhci
->dcbaa
->dev_context_ptrs
[0] = cpu_to_le64(xhci
->scratchpad
->sp_dma
);
1642 for (i
= 0; i
< num_sp
; i
++) {
1644 void *buf
= dma_alloc_coherent(dev
, xhci
->page_size
, &dma
,
1649 xhci
->scratchpad
->sp_array
[i
] = dma
;
1650 xhci
->scratchpad
->sp_buffers
[i
] = buf
;
1651 xhci
->scratchpad
->sp_dma_buffers
[i
] = dma
;
1657 for (i
= i
- 1; i
>= 0; i
--) {
1658 dma_free_coherent(dev
, xhci
->page_size
,
1659 xhci
->scratchpad
->sp_buffers
[i
],
1660 xhci
->scratchpad
->sp_dma_buffers
[i
]);
1662 kfree(xhci
->scratchpad
->sp_dma_buffers
);
1665 kfree(xhci
->scratchpad
->sp_buffers
);
1668 dma_free_coherent(dev
, num_sp
* sizeof(u64
),
1669 xhci
->scratchpad
->sp_array
,
1670 xhci
->scratchpad
->sp_dma
);
1673 kfree(xhci
->scratchpad
);
1674 xhci
->scratchpad
= NULL
;
1680 static void scratchpad_free(struct xhci_hcd
*xhci
)
1684 struct pci_dev
*pdev
= to_pci_dev(xhci_to_hcd(xhci
)->self
.controller
);
1686 if (!xhci
->scratchpad
)
1689 num_sp
= HCS_MAX_SCRATCHPAD(xhci
->hcs_params2
);
1691 for (i
= 0; i
< num_sp
; i
++) {
1692 dma_free_coherent(&pdev
->dev
, xhci
->page_size
,
1693 xhci
->scratchpad
->sp_buffers
[i
],
1694 xhci
->scratchpad
->sp_dma_buffers
[i
]);
1696 kfree(xhci
->scratchpad
->sp_dma_buffers
);
1697 kfree(xhci
->scratchpad
->sp_buffers
);
1698 dma_free_coherent(&pdev
->dev
, num_sp
* sizeof(u64
),
1699 xhci
->scratchpad
->sp_array
,
1700 xhci
->scratchpad
->sp_dma
);
1701 kfree(xhci
->scratchpad
);
1702 xhci
->scratchpad
= NULL
;
1705 struct xhci_command
*xhci_alloc_command(struct xhci_hcd
*xhci
,
1706 bool allocate_in_ctx
, bool allocate_completion
,
1709 struct xhci_command
*command
;
1711 command
= kzalloc(sizeof(*command
), mem_flags
);
1715 if (allocate_in_ctx
) {
1717 xhci_alloc_container_ctx(xhci
, XHCI_CTX_TYPE_INPUT
,
1719 if (!command
->in_ctx
) {
1725 if (allocate_completion
) {
1726 command
->completion
=
1727 kzalloc(sizeof(struct completion
), mem_flags
);
1728 if (!command
->completion
) {
1729 xhci_free_container_ctx(xhci
, command
->in_ctx
);
1733 init_completion(command
->completion
);
1736 command
->status
= 0;
1737 INIT_LIST_HEAD(&command
->cmd_list
);
1741 void xhci_urb_free_priv(struct xhci_hcd
*xhci
, struct urb_priv
*urb_priv
)
1744 kfree(urb_priv
->td
[0]);
1749 void xhci_free_command(struct xhci_hcd
*xhci
,
1750 struct xhci_command
*command
)
1752 xhci_free_container_ctx(xhci
,
1754 kfree(command
->completion
);
1758 void xhci_mem_cleanup(struct xhci_hcd
*xhci
)
1760 struct pci_dev
*pdev
= to_pci_dev(xhci_to_hcd(xhci
)->self
.controller
);
1761 struct dev_info
*dev_info
, *next
;
1762 struct xhci_cd
*cur_cd
, *next_cd
;
1763 unsigned long flags
;
1765 int i
, j
, num_ports
;
1767 /* Free the Event Ring Segment Table and the actual Event Ring */
1768 size
= sizeof(struct xhci_erst_entry
)*(xhci
->erst
.num_entries
);
1769 if (xhci
->erst
.entries
)
1770 dma_free_coherent(&pdev
->dev
, size
,
1771 xhci
->erst
.entries
, xhci
->erst
.erst_dma_addr
);
1772 xhci
->erst
.entries
= NULL
;
1773 xhci_dbg(xhci
, "Freed ERST\n");
1774 if (xhci
->event_ring
)
1775 xhci_ring_free(xhci
, xhci
->event_ring
);
1776 xhci
->event_ring
= NULL
;
1777 xhci_dbg(xhci
, "Freed event ring\n");
1779 if (xhci
->lpm_command
)
1780 xhci_free_command(xhci
, xhci
->lpm_command
);
1781 xhci
->cmd_ring_reserved_trbs
= 0;
1783 xhci_ring_free(xhci
, xhci
->cmd_ring
);
1784 xhci
->cmd_ring
= NULL
;
1785 xhci_dbg(xhci
, "Freed command ring\n");
1786 list_for_each_entry_safe(cur_cd
, next_cd
,
1787 &xhci
->cancel_cmd_list
, cancel_cmd_list
) {
1788 list_del(&cur_cd
->cancel_cmd_list
);
1792 for (i
= 1; i
< MAX_HC_SLOTS
; ++i
)
1793 xhci_free_virt_device(xhci
, i
);
1795 if (xhci
->segment_pool
)
1796 dma_pool_destroy(xhci
->segment_pool
);
1797 xhci
->segment_pool
= NULL
;
1798 xhci_dbg(xhci
, "Freed segment pool\n");
1800 if (xhci
->device_pool
)
1801 dma_pool_destroy(xhci
->device_pool
);
1802 xhci
->device_pool
= NULL
;
1803 xhci_dbg(xhci
, "Freed device context pool\n");
1805 if (xhci
->small_streams_pool
)
1806 dma_pool_destroy(xhci
->small_streams_pool
);
1807 xhci
->small_streams_pool
= NULL
;
1808 xhci_dbg(xhci
, "Freed small stream array pool\n");
1810 if (xhci
->medium_streams_pool
)
1811 dma_pool_destroy(xhci
->medium_streams_pool
);
1812 xhci
->medium_streams_pool
= NULL
;
1813 xhci_dbg(xhci
, "Freed medium stream array pool\n");
1816 dma_free_coherent(&pdev
->dev
, sizeof(*xhci
->dcbaa
),
1817 xhci
->dcbaa
, xhci
->dcbaa
->dma
);
1820 scratchpad_free(xhci
);
1822 spin_lock_irqsave(&xhci
->lock
, flags
);
1823 list_for_each_entry_safe(dev_info
, next
, &xhci
->lpm_failed_devs
, list
) {
1824 list_del(&dev_info
->list
);
1827 spin_unlock_irqrestore(&xhci
->lock
, flags
);
1832 num_ports
= HCS_MAX_PORTS(xhci
->hcs_params1
);
1833 for (i
= 0; i
< num_ports
; i
++) {
1834 struct xhci_interval_bw_table
*bwt
= &xhci
->rh_bw
[i
].bw_table
;
1835 for (j
= 0; j
< XHCI_MAX_INTERVAL
; j
++) {
1836 struct list_head
*ep
= &bwt
->interval_bw
[j
].endpoints
;
1837 while (!list_empty(ep
))
1838 list_del_init(ep
->next
);
1842 for (i
= 0; i
< num_ports
; i
++) {
1843 struct xhci_tt_bw_info
*tt
, *n
;
1844 list_for_each_entry_safe(tt
, n
, &xhci
->rh_bw
[i
].tts
, tt_list
) {
1845 list_del(&tt
->tt_list
);
1851 xhci
->num_usb2_ports
= 0;
1852 xhci
->num_usb3_ports
= 0;
1853 xhci
->num_active_eps
= 0;
1854 kfree(xhci
->usb2_ports
);
1855 kfree(xhci
->usb3_ports
);
1856 kfree(xhci
->port_array
);
1858 kfree(xhci
->ext_caps
);
1860 xhci
->page_size
= 0;
1861 xhci
->page_shift
= 0;
1862 xhci
->bus_state
[0].bus_suspended
= 0;
1863 xhci
->bus_state
[1].bus_suspended
= 0;
1866 static int xhci_test_trb_in_td(struct xhci_hcd
*xhci
,
1867 struct xhci_segment
*input_seg
,
1868 union xhci_trb
*start_trb
,
1869 union xhci_trb
*end_trb
,
1870 dma_addr_t input_dma
,
1871 struct xhci_segment
*result_seg
,
1872 char *test_name
, int test_number
)
1874 unsigned long long start_dma
;
1875 unsigned long long end_dma
;
1876 struct xhci_segment
*seg
;
1878 start_dma
= xhci_trb_virt_to_dma(input_seg
, start_trb
);
1879 end_dma
= xhci_trb_virt_to_dma(input_seg
, end_trb
);
1881 seg
= trb_in_td(input_seg
, start_trb
, end_trb
, input_dma
);
1882 if (seg
!= result_seg
) {
1883 xhci_warn(xhci
, "WARN: %s TRB math test %d failed!\n",
1884 test_name
, test_number
);
1885 xhci_warn(xhci
, "Tested TRB math w/ seg %p and "
1886 "input DMA 0x%llx\n",
1888 (unsigned long long) input_dma
);
1889 xhci_warn(xhci
, "starting TRB %p (0x%llx DMA), "
1890 "ending TRB %p (0x%llx DMA)\n",
1891 start_trb
, start_dma
,
1893 xhci_warn(xhci
, "Expected seg %p, got seg %p\n",
1900 /* TRB math checks for xhci_trb_in_td(), using the command and event rings. */
1901 static int xhci_check_trb_in_td_math(struct xhci_hcd
*xhci
, gfp_t mem_flags
)
1904 dma_addr_t input_dma
;
1905 struct xhci_segment
*result_seg
;
1906 } simple_test_vector
[] = {
1907 /* A zeroed DMA field should fail */
1909 /* One TRB before the ring start should fail */
1910 { xhci
->event_ring
->first_seg
->dma
- 16, NULL
},
1911 /* One byte before the ring start should fail */
1912 { xhci
->event_ring
->first_seg
->dma
- 1, NULL
},
1913 /* Starting TRB should succeed */
1914 { xhci
->event_ring
->first_seg
->dma
, xhci
->event_ring
->first_seg
},
1915 /* Ending TRB should succeed */
1916 { xhci
->event_ring
->first_seg
->dma
+ (TRBS_PER_SEGMENT
- 1)*16,
1917 xhci
->event_ring
->first_seg
},
1918 /* One byte after the ring end should fail */
1919 { xhci
->event_ring
->first_seg
->dma
+ (TRBS_PER_SEGMENT
- 1)*16 + 1, NULL
},
1920 /* One TRB after the ring end should fail */
1921 { xhci
->event_ring
->first_seg
->dma
+ (TRBS_PER_SEGMENT
)*16, NULL
},
1922 /* An address of all ones should fail */
1923 { (dma_addr_t
) (~0), NULL
},
1926 struct xhci_segment
*input_seg
;
1927 union xhci_trb
*start_trb
;
1928 union xhci_trb
*end_trb
;
1929 dma_addr_t input_dma
;
1930 struct xhci_segment
*result_seg
;
1931 } complex_test_vector
[] = {
1932 /* Test feeding a valid DMA address from a different ring */
1933 { .input_seg
= xhci
->event_ring
->first_seg
,
1934 .start_trb
= xhci
->event_ring
->first_seg
->trbs
,
1935 .end_trb
= &xhci
->event_ring
->first_seg
->trbs
[TRBS_PER_SEGMENT
- 1],
1936 .input_dma
= xhci
->cmd_ring
->first_seg
->dma
,
1939 /* Test feeding a valid end TRB from a different ring */
1940 { .input_seg
= xhci
->event_ring
->first_seg
,
1941 .start_trb
= xhci
->event_ring
->first_seg
->trbs
,
1942 .end_trb
= &xhci
->cmd_ring
->first_seg
->trbs
[TRBS_PER_SEGMENT
- 1],
1943 .input_dma
= xhci
->cmd_ring
->first_seg
->dma
,
1946 /* Test feeding a valid start and end TRB from a different ring */
1947 { .input_seg
= xhci
->event_ring
->first_seg
,
1948 .start_trb
= xhci
->cmd_ring
->first_seg
->trbs
,
1949 .end_trb
= &xhci
->cmd_ring
->first_seg
->trbs
[TRBS_PER_SEGMENT
- 1],
1950 .input_dma
= xhci
->cmd_ring
->first_seg
->dma
,
1953 /* TRB in this ring, but after this TD */
1954 { .input_seg
= xhci
->event_ring
->first_seg
,
1955 .start_trb
= &xhci
->event_ring
->first_seg
->trbs
[0],
1956 .end_trb
= &xhci
->event_ring
->first_seg
->trbs
[3],
1957 .input_dma
= xhci
->event_ring
->first_seg
->dma
+ 4*16,
1960 /* TRB in this ring, but before this TD */
1961 { .input_seg
= xhci
->event_ring
->first_seg
,
1962 .start_trb
= &xhci
->event_ring
->first_seg
->trbs
[3],
1963 .end_trb
= &xhci
->event_ring
->first_seg
->trbs
[6],
1964 .input_dma
= xhci
->event_ring
->first_seg
->dma
+ 2*16,
1967 /* TRB in this ring, but after this wrapped TD */
1968 { .input_seg
= xhci
->event_ring
->first_seg
,
1969 .start_trb
= &xhci
->event_ring
->first_seg
->trbs
[TRBS_PER_SEGMENT
- 3],
1970 .end_trb
= &xhci
->event_ring
->first_seg
->trbs
[1],
1971 .input_dma
= xhci
->event_ring
->first_seg
->dma
+ 2*16,
1974 /* TRB in this ring, but before this wrapped TD */
1975 { .input_seg
= xhci
->event_ring
->first_seg
,
1976 .start_trb
= &xhci
->event_ring
->first_seg
->trbs
[TRBS_PER_SEGMENT
- 3],
1977 .end_trb
= &xhci
->event_ring
->first_seg
->trbs
[1],
1978 .input_dma
= xhci
->event_ring
->first_seg
->dma
+ (TRBS_PER_SEGMENT
- 4)*16,
1981 /* TRB not in this ring, and we have a wrapped TD */
1982 { .input_seg
= xhci
->event_ring
->first_seg
,
1983 .start_trb
= &xhci
->event_ring
->first_seg
->trbs
[TRBS_PER_SEGMENT
- 3],
1984 .end_trb
= &xhci
->event_ring
->first_seg
->trbs
[1],
1985 .input_dma
= xhci
->cmd_ring
->first_seg
->dma
+ 2*16,
1990 unsigned int num_tests
;
1993 num_tests
= ARRAY_SIZE(simple_test_vector
);
1994 for (i
= 0; i
< num_tests
; i
++) {
1995 ret
= xhci_test_trb_in_td(xhci
,
1996 xhci
->event_ring
->first_seg
,
1997 xhci
->event_ring
->first_seg
->trbs
,
1998 &xhci
->event_ring
->first_seg
->trbs
[TRBS_PER_SEGMENT
- 1],
1999 simple_test_vector
[i
].input_dma
,
2000 simple_test_vector
[i
].result_seg
,
2006 num_tests
= ARRAY_SIZE(complex_test_vector
);
2007 for (i
= 0; i
< num_tests
; i
++) {
2008 ret
= xhci_test_trb_in_td(xhci
,
2009 complex_test_vector
[i
].input_seg
,
2010 complex_test_vector
[i
].start_trb
,
2011 complex_test_vector
[i
].end_trb
,
2012 complex_test_vector
[i
].input_dma
,
2013 complex_test_vector
[i
].result_seg
,
2018 xhci_dbg(xhci
, "TRB math tests passed.\n");
2022 static void xhci_set_hc_event_deq(struct xhci_hcd
*xhci
)
2027 deq
= xhci_trb_virt_to_dma(xhci
->event_ring
->deq_seg
,
2028 xhci
->event_ring
->dequeue
);
2029 if (deq
== 0 && !in_interrupt())
2030 xhci_warn(xhci
, "WARN something wrong with SW event ring "
2032 /* Update HC event ring dequeue pointer */
2033 temp
= xhci_read_64(xhci
, &xhci
->ir_set
->erst_dequeue
);
2034 temp
&= ERST_PTR_MASK
;
2035 /* Don't clear the EHB bit (which is RW1C) because
2036 * there might be more events to service.
2039 xhci_dbg(xhci
, "// Write event ring dequeue pointer, "
2040 "preserving EHB bit\n");
2041 xhci_write_64(xhci
, ((u64
) deq
& (u64
) ~ERST_PTR_MASK
) | temp
,
2042 &xhci
->ir_set
->erst_dequeue
);
2045 static void xhci_add_in_port(struct xhci_hcd
*xhci
, unsigned int num_ports
,
2046 __le32 __iomem
*addr
, u8 major_revision
, int max_caps
)
2048 u32 temp
, port_offset
, port_count
;
2051 if (major_revision
> 0x03) {
2052 xhci_warn(xhci
, "Ignoring unknown port speed, "
2053 "Ext Cap %p, revision = 0x%x\n",
2054 addr
, major_revision
);
2055 /* Ignoring port protocol we can't understand. FIXME */
2059 /* Port offset and count in the third dword, see section 7.2 */
2060 temp
= xhci_readl(xhci
, addr
+ 2);
2061 port_offset
= XHCI_EXT_PORT_OFF(temp
);
2062 port_count
= XHCI_EXT_PORT_COUNT(temp
);
2063 xhci_dbg(xhci
, "Ext Cap %p, port offset = %u, "
2064 "count = %u, revision = 0x%x\n",
2065 addr
, port_offset
, port_count
, major_revision
);
2066 /* Port count includes the current port offset */
2067 if (port_offset
== 0 || (port_offset
+ port_count
- 1) > num_ports
)
2068 /* WTF? "Valid values are ‘1’ to MaxPorts" */
2071 /* cache usb2 port capabilities */
2072 if (major_revision
< 0x03 && xhci
->num_ext_caps
< max_caps
)
2073 xhci
->ext_caps
[xhci
->num_ext_caps
++] = temp
;
2075 /* Check the host's USB2 LPM capability */
2076 if ((xhci
->hci_version
== 0x96) && (major_revision
!= 0x03) &&
2077 (temp
& XHCI_L1C
)) {
2078 xhci_dbg(xhci
, "xHCI 0.96: support USB2 software lpm\n");
2079 xhci
->sw_lpm_support
= 1;
2082 if ((xhci
->hci_version
>= 0x100) && (major_revision
!= 0x03)) {
2083 xhci_dbg(xhci
, "xHCI 1.0: support USB2 software lpm\n");
2084 xhci
->sw_lpm_support
= 1;
2085 if (temp
& XHCI_HLC
) {
2086 xhci_dbg(xhci
, "xHCI 1.0: support USB2 hardware lpm\n");
2087 xhci
->hw_lpm_support
= 1;
2092 for (i
= port_offset
; i
< (port_offset
+ port_count
); i
++) {
2093 /* Duplicate entry. Ignore the port if the revisions differ. */
2094 if (xhci
->port_array
[i
] != 0) {
2095 xhci_warn(xhci
, "Duplicate port entry, Ext Cap %p,"
2096 " port %u\n", addr
, i
);
2097 xhci_warn(xhci
, "Port was marked as USB %u, "
2098 "duplicated as USB %u\n",
2099 xhci
->port_array
[i
], major_revision
);
2100 /* Only adjust the roothub port counts if we haven't
2101 * found a similar duplicate.
2103 if (xhci
->port_array
[i
] != major_revision
&&
2104 xhci
->port_array
[i
] != DUPLICATE_ENTRY
) {
2105 if (xhci
->port_array
[i
] == 0x03)
2106 xhci
->num_usb3_ports
--;
2108 xhci
->num_usb2_ports
--;
2109 xhci
->port_array
[i
] = DUPLICATE_ENTRY
;
2111 /* FIXME: Should we disable the port? */
2114 xhci
->port_array
[i
] = major_revision
;
2115 if (major_revision
== 0x03)
2116 xhci
->num_usb3_ports
++;
2118 xhci
->num_usb2_ports
++;
2120 /* FIXME: Should we disable ports not in the Extended Capabilities? */
2124 * Scan the Extended Capabilities for the "Supported Protocol Capabilities" that
2125 * specify what speeds each port is supposed to be. We can't count on the port
2126 * speed bits in the PORTSC register being correct until a device is connected,
2127 * but we need to set up the two fake roothubs with the correct number of USB
2128 * 3.0 and USB 2.0 ports at host controller initialization time.
2130 static int xhci_setup_port_arrays(struct xhci_hcd
*xhci
, gfp_t flags
)
2132 __le32 __iomem
*addr
, *tmp_addr
;
2133 u32 offset
, tmp_offset
;
2134 unsigned int num_ports
;
2135 int i
, j
, port_index
;
2138 addr
= &xhci
->cap_regs
->hcc_params
;
2139 offset
= XHCI_HCC_EXT_CAPS(xhci_readl(xhci
, addr
));
2141 xhci_err(xhci
, "No Extended Capability registers, "
2142 "unable to set up roothub.\n");
2146 num_ports
= HCS_MAX_PORTS(xhci
->hcs_params1
);
2147 xhci
->port_array
= kzalloc(sizeof(*xhci
->port_array
)*num_ports
, flags
);
2148 if (!xhci
->port_array
)
2151 xhci
->rh_bw
= kzalloc(sizeof(*xhci
->rh_bw
)*num_ports
, flags
);
2154 for (i
= 0; i
< num_ports
; i
++) {
2155 struct xhci_interval_bw_table
*bw_table
;
2157 INIT_LIST_HEAD(&xhci
->rh_bw
[i
].tts
);
2158 bw_table
= &xhci
->rh_bw
[i
].bw_table
;
2159 for (j
= 0; j
< XHCI_MAX_INTERVAL
; j
++)
2160 INIT_LIST_HEAD(&bw_table
->interval_bw
[j
].endpoints
);
2164 * For whatever reason, the first capability offset is from the
2165 * capability register base, not from the HCCPARAMS register.
2166 * See section 5.3.6 for offset calculation.
2168 addr
= &xhci
->cap_regs
->hc_capbase
+ offset
;
2171 tmp_offset
= offset
;
2173 /* count extended protocol capability entries for later caching */
2176 cap_id
= xhci_readl(xhci
, tmp_addr
);
2177 if (XHCI_EXT_CAPS_ID(cap_id
) == XHCI_EXT_CAPS_PROTOCOL
)
2179 tmp_offset
= XHCI_EXT_CAPS_NEXT(cap_id
);
2180 tmp_addr
+= tmp_offset
;
2181 } while (tmp_offset
);
2183 xhci
->ext_caps
= kzalloc(sizeof(*xhci
->ext_caps
) * cap_count
, flags
);
2184 if (!xhci
->ext_caps
)
2190 cap_id
= xhci_readl(xhci
, addr
);
2191 if (XHCI_EXT_CAPS_ID(cap_id
) == XHCI_EXT_CAPS_PROTOCOL
)
2192 xhci_add_in_port(xhci
, num_ports
, addr
,
2193 (u8
) XHCI_EXT_PORT_MAJOR(cap_id
),
2195 offset
= XHCI_EXT_CAPS_NEXT(cap_id
);
2196 if (!offset
|| (xhci
->num_usb2_ports
+ xhci
->num_usb3_ports
)
2200 * Once you're into the Extended Capabilities, the offset is
2201 * always relative to the register holding the offset.
2206 if (xhci
->num_usb2_ports
== 0 && xhci
->num_usb3_ports
== 0) {
2207 xhci_warn(xhci
, "No ports on the roothubs?\n");
2210 xhci_dbg(xhci
, "Found %u USB 2.0 ports and %u USB 3.0 ports.\n",
2211 xhci
->num_usb2_ports
, xhci
->num_usb3_ports
);
2213 /* Place limits on the number of roothub ports so that the hub
2214 * descriptors aren't longer than the USB core will allocate.
2216 if (xhci
->num_usb3_ports
> 15) {
2217 xhci_dbg(xhci
, "Limiting USB 3.0 roothub ports to 15.\n");
2218 xhci
->num_usb3_ports
= 15;
2220 if (xhci
->num_usb2_ports
> USB_MAXCHILDREN
) {
2221 xhci_dbg(xhci
, "Limiting USB 2.0 roothub ports to %u.\n",
2223 xhci
->num_usb2_ports
= USB_MAXCHILDREN
;
2227 * Note we could have all USB 3.0 ports, or all USB 2.0 ports.
2228 * Not sure how the USB core will handle a hub with no ports...
2230 if (xhci
->num_usb2_ports
) {
2231 xhci
->usb2_ports
= kmalloc(sizeof(*xhci
->usb2_ports
)*
2232 xhci
->num_usb2_ports
, flags
);
2233 if (!xhci
->usb2_ports
)
2237 for (i
= 0; i
< num_ports
; i
++) {
2238 if (xhci
->port_array
[i
] == 0x03 ||
2239 xhci
->port_array
[i
] == 0 ||
2240 xhci
->port_array
[i
] == DUPLICATE_ENTRY
)
2243 xhci
->usb2_ports
[port_index
] =
2244 &xhci
->op_regs
->port_status_base
+
2246 xhci_dbg(xhci
, "USB 2.0 port at index %u, "
2248 xhci
->usb2_ports
[port_index
]);
2250 if (port_index
== xhci
->num_usb2_ports
)
2254 if (xhci
->num_usb3_ports
) {
2255 xhci
->usb3_ports
= kmalloc(sizeof(*xhci
->usb3_ports
)*
2256 xhci
->num_usb3_ports
, flags
);
2257 if (!xhci
->usb3_ports
)
2261 for (i
= 0; i
< num_ports
; i
++)
2262 if (xhci
->port_array
[i
] == 0x03) {
2263 xhci
->usb3_ports
[port_index
] =
2264 &xhci
->op_regs
->port_status_base
+
2266 xhci_dbg(xhci
, "USB 3.0 port at index %u, "
2268 xhci
->usb3_ports
[port_index
]);
2270 if (port_index
== xhci
->num_usb3_ports
)
2277 int xhci_mem_init(struct xhci_hcd
*xhci
, gfp_t flags
)
2280 struct device
*dev
= xhci_to_hcd(xhci
)->self
.controller
;
2281 unsigned int val
, val2
;
2283 struct xhci_segment
*seg
;
2284 u32 page_size
, temp
;
2287 INIT_LIST_HEAD(&xhci
->lpm_failed_devs
);
2288 INIT_LIST_HEAD(&xhci
->cancel_cmd_list
);
2290 page_size
= xhci_readl(xhci
, &xhci
->op_regs
->page_size
);
2291 xhci_dbg(xhci
, "Supported page size register = 0x%x\n", page_size
);
2292 for (i
= 0; i
< 16; i
++) {
2293 if ((0x1 & page_size
) != 0)
2295 page_size
= page_size
>> 1;
2298 xhci_dbg(xhci
, "Supported page size of %iK\n", (1 << (i
+12)) / 1024);
2300 xhci_warn(xhci
, "WARN: no supported page size\n");
2301 /* Use 4K pages, since that's common and the minimum the HC supports */
2302 xhci
->page_shift
= 12;
2303 xhci
->page_size
= 1 << xhci
->page_shift
;
2304 xhci_dbg(xhci
, "HCD page size set to %iK\n", xhci
->page_size
/ 1024);
2307 * Program the Number of Device Slots Enabled field in the CONFIG
2308 * register with the max value of slots the HC can handle.
2310 val
= HCS_MAX_SLOTS(xhci_readl(xhci
, &xhci
->cap_regs
->hcs_params1
));
2311 xhci_dbg(xhci
, "// xHC can handle at most %d device slots.\n",
2312 (unsigned int) val
);
2313 val2
= xhci_readl(xhci
, &xhci
->op_regs
->config_reg
);
2314 val
|= (val2
& ~HCS_SLOTS_MASK
);
2315 xhci_dbg(xhci
, "// Setting Max device slots reg = 0x%x.\n",
2316 (unsigned int) val
);
2317 xhci_writel(xhci
, val
, &xhci
->op_regs
->config_reg
);
2320 * Section 5.4.8 - doorbell array must be
2321 * "physically contiguous and 64-byte (cache line) aligned".
2323 xhci
->dcbaa
= dma_alloc_coherent(dev
, sizeof(*xhci
->dcbaa
), &dma
,
2327 memset(xhci
->dcbaa
, 0, sizeof *(xhci
->dcbaa
));
2328 xhci
->dcbaa
->dma
= dma
;
2329 xhci_dbg(xhci
, "// Device context base array address = 0x%llx (DMA), %p (virt)\n",
2330 (unsigned long long)xhci
->dcbaa
->dma
, xhci
->dcbaa
);
2331 xhci_write_64(xhci
, dma
, &xhci
->op_regs
->dcbaa_ptr
);
2334 * Initialize the ring segment pool. The ring must be a contiguous
2335 * structure comprised of TRBs. The TRBs must be 16 byte aligned,
2336 * however, the command ring segment needs 64-byte aligned segments,
2337 * so we pick the greater alignment need.
2339 xhci
->segment_pool
= dma_pool_create("xHCI ring segments", dev
,
2340 TRB_SEGMENT_SIZE
, 64, xhci
->page_size
);
2342 /* See Table 46 and Note on Figure 55 */
2343 xhci
->device_pool
= dma_pool_create("xHCI input/output contexts", dev
,
2344 2112, 64, xhci
->page_size
);
2345 if (!xhci
->segment_pool
|| !xhci
->device_pool
)
2348 /* Linear stream context arrays don't have any boundary restrictions,
2349 * and only need to be 16-byte aligned.
2351 xhci
->small_streams_pool
=
2352 dma_pool_create("xHCI 256 byte stream ctx arrays",
2353 dev
, SMALL_STREAM_ARRAY_SIZE
, 16, 0);
2354 xhci
->medium_streams_pool
=
2355 dma_pool_create("xHCI 1KB stream ctx arrays",
2356 dev
, MEDIUM_STREAM_ARRAY_SIZE
, 16, 0);
2357 /* Any stream context array bigger than MEDIUM_STREAM_ARRAY_SIZE
2358 * will be allocated with dma_alloc_coherent()
2361 if (!xhci
->small_streams_pool
|| !xhci
->medium_streams_pool
)
2364 /* Set up the command ring to have one segments for now. */
2365 xhci
->cmd_ring
= xhci_ring_alloc(xhci
, 1, 1, TYPE_COMMAND
, flags
);
2366 if (!xhci
->cmd_ring
)
2368 xhci_dbg(xhci
, "Allocated command ring at %p\n", xhci
->cmd_ring
);
2369 xhci_dbg(xhci
, "First segment DMA is 0x%llx\n",
2370 (unsigned long long)xhci
->cmd_ring
->first_seg
->dma
);
2372 /* Set the address in the Command Ring Control register */
2373 val_64
= xhci_read_64(xhci
, &xhci
->op_regs
->cmd_ring
);
2374 val_64
= (val_64
& (u64
) CMD_RING_RSVD_BITS
) |
2375 (xhci
->cmd_ring
->first_seg
->dma
& (u64
) ~CMD_RING_RSVD_BITS
) |
2376 xhci
->cmd_ring
->cycle_state
;
2377 xhci_dbg(xhci
, "// Setting command ring address to 0x%x\n", val
);
2378 xhci_write_64(xhci
, val_64
, &xhci
->op_regs
->cmd_ring
);
2379 xhci_dbg_cmd_ptrs(xhci
);
2381 xhci
->lpm_command
= xhci_alloc_command(xhci
, true, true, flags
);
2382 if (!xhci
->lpm_command
)
2385 /* Reserve one command ring TRB for disabling LPM.
2386 * Since the USB core grabs the shared usb_bus bandwidth mutex before
2387 * disabling LPM, we only need to reserve one TRB for all devices.
2389 xhci
->cmd_ring_reserved_trbs
++;
2391 val
= xhci_readl(xhci
, &xhci
->cap_regs
->db_off
);
2393 xhci_dbg(xhci
, "// Doorbell array is located at offset 0x%x"
2394 " from cap regs base addr\n", val
);
2395 xhci
->dba
= (void __iomem
*) xhci
->cap_regs
+ val
;
2396 xhci_dbg_regs(xhci
);
2397 xhci_print_run_regs(xhci
);
2398 /* Set ir_set to interrupt register set 0 */
2399 xhci
->ir_set
= &xhci
->run_regs
->ir_set
[0];
2402 * Event ring setup: Allocate a normal ring, but also setup
2403 * the event ring segment table (ERST). Section 4.9.3.
2405 xhci_dbg(xhci
, "// Allocating event ring\n");
2406 xhci
->event_ring
= xhci_ring_alloc(xhci
, ERST_NUM_SEGS
, 1, TYPE_EVENT
,
2408 if (!xhci
->event_ring
)
2410 if (xhci_check_trb_in_td_math(xhci
, flags
) < 0)
2413 xhci
->erst
.entries
= dma_alloc_coherent(dev
,
2414 sizeof(struct xhci_erst_entry
) * ERST_NUM_SEGS
, &dma
,
2416 if (!xhci
->erst
.entries
)
2418 xhci_dbg(xhci
, "// Allocated event ring segment table at 0x%llx\n",
2419 (unsigned long long)dma
);
2421 memset(xhci
->erst
.entries
, 0, sizeof(struct xhci_erst_entry
)*ERST_NUM_SEGS
);
2422 xhci
->erst
.num_entries
= ERST_NUM_SEGS
;
2423 xhci
->erst
.erst_dma_addr
= dma
;
2424 xhci_dbg(xhci
, "Set ERST to 0; private num segs = %i, virt addr = %p, dma addr = 0x%llx\n",
2425 xhci
->erst
.num_entries
,
2427 (unsigned long long)xhci
->erst
.erst_dma_addr
);
2429 /* set ring base address and size for each segment table entry */
2430 for (val
= 0, seg
= xhci
->event_ring
->first_seg
; val
< ERST_NUM_SEGS
; val
++) {
2431 struct xhci_erst_entry
*entry
= &xhci
->erst
.entries
[val
];
2432 entry
->seg_addr
= cpu_to_le64(seg
->dma
);
2433 entry
->seg_size
= cpu_to_le32(TRBS_PER_SEGMENT
);
2438 /* set ERST count with the number of entries in the segment table */
2439 val
= xhci_readl(xhci
, &xhci
->ir_set
->erst_size
);
2440 val
&= ERST_SIZE_MASK
;
2441 val
|= ERST_NUM_SEGS
;
2442 xhci_dbg(xhci
, "// Write ERST size = %i to ir_set 0 (some bits preserved)\n",
2444 xhci_writel(xhci
, val
, &xhci
->ir_set
->erst_size
);
2446 xhci_dbg(xhci
, "// Set ERST entries to point to event ring.\n");
2447 /* set the segment table base address */
2448 xhci_dbg(xhci
, "// Set ERST base address for ir_set 0 = 0x%llx\n",
2449 (unsigned long long)xhci
->erst
.erst_dma_addr
);
2450 val_64
= xhci_read_64(xhci
, &xhci
->ir_set
->erst_base
);
2451 val_64
&= ERST_PTR_MASK
;
2452 val_64
|= (xhci
->erst
.erst_dma_addr
& (u64
) ~ERST_PTR_MASK
);
2453 xhci_write_64(xhci
, val_64
, &xhci
->ir_set
->erst_base
);
2455 /* Set the event ring dequeue address */
2456 xhci_set_hc_event_deq(xhci
);
2457 xhci_dbg(xhci
, "Wrote ERST address to ir_set 0.\n");
2458 xhci_print_ir_set(xhci
, 0);
2461 * XXX: Might need to set the Interrupter Moderation Register to
2462 * something other than the default (~1ms minimum between interrupts).
2463 * See section 5.5.1.2.
2465 init_completion(&xhci
->addr_dev
);
2466 for (i
= 0; i
< MAX_HC_SLOTS
; ++i
)
2467 xhci
->devs
[i
] = NULL
;
2468 for (i
= 0; i
< USB_MAXCHILDREN
; ++i
) {
2469 xhci
->bus_state
[0].resume_done
[i
] = 0;
2470 xhci
->bus_state
[1].resume_done
[i
] = 0;
2473 if (scratchpad_alloc(xhci
, flags
))
2475 if (xhci_setup_port_arrays(xhci
, flags
))
2478 /* Enable USB 3.0 device notifications for function remote wake, which
2479 * is necessary for allowing USB 3.0 devices to do remote wakeup from
2480 * U3 (device suspend).
2482 temp
= xhci_readl(xhci
, &xhci
->op_regs
->dev_notification
);
2483 temp
&= ~DEV_NOTE_MASK
;
2484 temp
|= DEV_NOTE_FWAKE
;
2485 xhci_writel(xhci
, temp
, &xhci
->op_regs
->dev_notification
);
2490 xhci_warn(xhci
, "Couldn't initialize memory\n");
2493 xhci_mem_cleanup(xhci
);