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 = kzalloc(sizeof(*ctx), flags);
365 BUG_ON((type != XHCI_CTX_TYPE_DEVICE) && (type != XHCI_CTX_TYPE_INPUT));
367 ctx->size = HCC_64BYTE_CONTEXT(xhci->hcc_params) ? 2048 : 1024;
368 if (type == XHCI_CTX_TYPE_INPUT)
369 ctx->size += CTX_SIZE(xhci->hcc_params);
371 ctx->bytes = dma_pool_alloc(xhci->device_pool, flags, &ctx->dma);
372 memset(ctx->bytes, 0, ctx->size);
376 static void xhci_free_container_ctx(struct xhci_hcd *xhci,
377 struct xhci_container_ctx *ctx)
381 dma_pool_free(xhci->device_pool, ctx->bytes, ctx->dma);
385 struct xhci_input_control_ctx *xhci_get_input_control_ctx(struct xhci_hcd *xhci,
386 struct xhci_container_ctx *ctx)
388 BUG_ON(ctx->type != XHCI_CTX_TYPE_INPUT);
389 return (struct xhci_input_control_ctx *)ctx->bytes;
392 struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_hcd *xhci,
393 struct xhci_container_ctx *ctx)
395 if (ctx->type == XHCI_CTX_TYPE_DEVICE)
396 return (struct xhci_slot_ctx *)ctx->bytes;
398 return (struct xhci_slot_ctx *)
399 (ctx->bytes + CTX_SIZE(xhci->hcc_params));
402 struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_hcd *xhci,
403 struct xhci_container_ctx *ctx,
404 unsigned int ep_index)
406 /* increment ep index by offset of start of ep ctx array */
408 if (ctx->type == XHCI_CTX_TYPE_INPUT)
411 return (struct xhci_ep_ctx *)
412 (ctx->bytes + (ep_index * CTX_SIZE(xhci->hcc_params)));
416 /***************** Streams structures manipulation *************************/
418 static void xhci_free_stream_ctx(struct xhci_hcd *xhci,
419 unsigned int num_stream_ctxs,
420 struct xhci_stream_ctx *stream_ctx, dma_addr_t dma)
422 struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
424 if (num_stream_ctxs > MEDIUM_STREAM_ARRAY_SIZE)
425 dma_free_coherent(&pdev->dev,
426 sizeof(struct xhci_stream_ctx)*num_stream_ctxs,
428 else if (num_stream_ctxs <= SMALL_STREAM_ARRAY_SIZE)
429 return dma_pool_free(xhci->small_streams_pool,
432 return dma_pool_free(xhci->medium_streams_pool,
437 * The stream context array for each endpoint with bulk streams enabled can
438 * vary in size, based on:
439 * - how many streams the endpoint supports,
440 * - the maximum primary stream array size the host controller supports,
441 * - and how many streams the device driver asks for.
443 * The stream context array must be a power of 2, and can be as small as
444 * 64 bytes or as large as 1MB.
446 static struct xhci_stream_ctx *xhci_alloc_stream_ctx(struct xhci_hcd *xhci,
447 unsigned int num_stream_ctxs, dma_addr_t *dma,
450 struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
452 if (num_stream_ctxs > MEDIUM_STREAM_ARRAY_SIZE)
453 return dma_alloc_coherent(&pdev->dev,
454 sizeof(struct xhci_stream_ctx)*num_stream_ctxs,
456 else if (num_stream_ctxs <= SMALL_STREAM_ARRAY_SIZE)
457 return dma_pool_alloc(xhci->small_streams_pool,
460 return dma_pool_alloc(xhci->medium_streams_pool,
464 struct xhci_ring *xhci_dma_to_transfer_ring(
465 struct xhci_virt_ep *ep,
468 if (ep->ep_state & EP_HAS_STREAMS)
469 return radix_tree_lookup(&ep->stream_info->trb_address_map,
470 address >> TRB_SEGMENT_SHIFT);
474 /* Only use this when you know stream_info is valid */
475 #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
476 static struct xhci_ring *dma_to_stream_ring(
477 struct xhci_stream_info *stream_info,
480 return radix_tree_lookup(&stream_info->trb_address_map,
481 address >> TRB_SEGMENT_SHIFT);
483 #endif /* CONFIG_USB_XHCI_HCD_DEBUGGING */
485 struct xhci_ring *xhci_stream_id_to_ring(
486 struct xhci_virt_device *dev,
487 unsigned int ep_index,
488 unsigned int stream_id)
490 struct xhci_virt_ep *ep = &dev->eps[ep_index];
494 if (!ep->stream_info)
497 if (stream_id > ep->stream_info->num_streams)
499 return ep->stream_info->stream_rings[stream_id];
502 #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
503 static int xhci_test_radix_tree(struct xhci_hcd *xhci,
504 unsigned int num_streams,
505 struct xhci_stream_info *stream_info)
508 struct xhci_ring *cur_ring;
511 for (cur_stream = 1; cur_stream < num_streams; cur_stream++) {
512 struct xhci_ring *mapped_ring;
513 int trb_size = sizeof(union xhci_trb);
515 cur_ring = stream_info->stream_rings[cur_stream];
516 for (addr = cur_ring->first_seg->dma;
517 addr < cur_ring->first_seg->dma + TRB_SEGMENT_SIZE;
519 mapped_ring = dma_to_stream_ring(stream_info, addr);
520 if (cur_ring != mapped_ring) {
521 xhci_warn(xhci, "WARN: DMA address 0x%08llx "
522 "didn't map to stream ID %u; "
523 "mapped to ring %p\n",
524 (unsigned long long) addr,
530 /* One TRB after the end of the ring segment shouldn't return a
531 * pointer to the current ring (although it may be a part of a
534 mapped_ring = dma_to_stream_ring(stream_info, addr);
535 if (mapped_ring != cur_ring) {
536 /* One TRB before should also fail */
537 addr = cur_ring->first_seg->dma - trb_size;
538 mapped_ring = dma_to_stream_ring(stream_info, addr);
540 if (mapped_ring == cur_ring) {
541 xhci_warn(xhci, "WARN: Bad DMA address 0x%08llx "
542 "mapped to valid stream ID %u; "
543 "mapped ring = %p\n",
544 (unsigned long long) addr,
552 #endif /* CONFIG_USB_XHCI_HCD_DEBUGGING */
555 * Change an endpoint's internal structure so it supports stream IDs. The
556 * number of requested streams includes stream 0, which cannot be used by device
559 * The number of stream contexts in the stream context array may be bigger than
560 * the number of streams the driver wants to use. This is because the number of
561 * stream context array entries must be a power of two.
563 * We need a radix tree for mapping physical addresses of TRBs to which stream
564 * ID they belong to. We need to do this because the host controller won't tell
565 * us which stream ring the TRB came from. We could store the stream ID in an
566 * event data TRB, but that doesn't help us for the cancellation case, since the
567 * endpoint may stop before it reaches that event data TRB.
569 * The radix tree maps the upper portion of the TRB DMA address to a ring
570 * segment that has the same upper portion of DMA addresses. For example, say I
571 * have segments of size 1KB, that are always 64-byte aligned. A segment may
572 * start at 0x10c91000 and end at 0x10c913f0. If I use the upper 10 bits, the
573 * key to the stream ID is 0x43244. I can use the DMA address of the TRB to
574 * pass the radix tree a key to get the right stream ID:
576 * 0x10c90fff >> 10 = 0x43243
577 * 0x10c912c0 >> 10 = 0x43244
578 * 0x10c91400 >> 10 = 0x43245
580 * Obviously, only those TRBs with DMA addresses that are within the segment
581 * will make the radix tree return the stream ID for that ring.
583 * Caveats for the radix tree:
585 * The radix tree uses an unsigned long as a key pair. On 32-bit systems, an
586 * unsigned long will be 32-bits; on a 64-bit system an unsigned long will be
587 * 64-bits. Since we only request 32-bit DMA addresses, we can use that as the
588 * key on 32-bit or 64-bit systems (it would also be fine if we asked for 64-bit
589 * PCI DMA addresses on a 64-bit system). There might be a problem on 32-bit
590 * extended systems (where the DMA address can be bigger than 32-bits),
591 * if we allow the PCI dma mask to be bigger than 32-bits. So don't do that.
593 struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci,
594 unsigned int num_stream_ctxs,
595 unsigned int num_streams, gfp_t mem_flags)
597 struct xhci_stream_info *stream_info;
599 struct xhci_ring *cur_ring;
604 xhci_dbg(xhci, "Allocating %u streams and %u "
605 "stream context array entries.\n",
606 num_streams, num_stream_ctxs);
607 if (xhci->cmd_ring_reserved_trbs == MAX_RSVD_CMD_TRBS) {
608 xhci_dbg(xhci, "Command ring has no reserved TRBs available\n");
611 xhci->cmd_ring_reserved_trbs++;
613 stream_info = kzalloc(sizeof(struct xhci_stream_info), mem_flags);
617 stream_info->num_streams = num_streams;
618 stream_info->num_stream_ctxs = num_stream_ctxs;
620 /* Initialize the array of virtual pointers to stream rings. */
621 stream_info->stream_rings = kzalloc(
622 sizeof(struct xhci_ring *)*num_streams,
624 if (!stream_info->stream_rings)
627 /* Initialize the array of DMA addresses for stream rings for the HW. */
628 stream_info->stream_ctx_array = xhci_alloc_stream_ctx(xhci,
629 num_stream_ctxs, &stream_info->ctx_array_dma,
631 if (!stream_info->stream_ctx_array)
633 memset(stream_info->stream_ctx_array, 0,
634 sizeof(struct xhci_stream_ctx)*num_stream_ctxs);
636 /* Allocate everything needed to free the stream rings later */
637 stream_info->free_streams_command =
638 xhci_alloc_command(xhci, true, true, mem_flags);
639 if (!stream_info->free_streams_command)
642 INIT_RADIX_TREE(&stream_info->trb_address_map, GFP_ATOMIC);
644 /* Allocate rings for all the streams that the driver will use,
645 * and add their segment DMA addresses to the radix tree.
646 * Stream 0 is reserved.
648 for (cur_stream = 1; cur_stream < num_streams; cur_stream++) {
649 stream_info->stream_rings[cur_stream] =
650 xhci_ring_alloc(xhci, 2, 1, TYPE_STREAM, mem_flags);
651 cur_ring = stream_info->stream_rings[cur_stream];
654 cur_ring->stream_id = cur_stream;
655 /* Set deq ptr, cycle bit, and stream context type */
656 addr = cur_ring->first_seg->dma |
657 SCT_FOR_CTX(SCT_PRI_TR) |
658 cur_ring->cycle_state;
659 stream_info->stream_ctx_array[cur_stream].stream_ring =
661 xhci_dbg(xhci, "Setting stream %d ring ptr to 0x%08llx\n",
662 cur_stream, (unsigned long long) addr);
664 key = (unsigned long)
665 (cur_ring->first_seg->dma >> TRB_SEGMENT_SHIFT);
666 ret = radix_tree_insert(&stream_info->trb_address_map,
669 xhci_ring_free(xhci, cur_ring);
670 stream_info->stream_rings[cur_stream] = NULL;
674 /* Leave the other unused stream ring pointers in the stream context
675 * array initialized to zero. This will cause the xHC to give us an
676 * error if the device asks for a stream ID we don't have setup (if it
677 * was any other way, the host controller would assume the ring is
678 * "empty" and wait forever for data to be queued to that stream ID).
681 /* Do a little test on the radix tree to make sure it returns the
684 if (xhci_test_radix_tree(xhci, num_streams, stream_info))
691 for (cur_stream = 1; cur_stream < num_streams; cur_stream++) {
692 cur_ring = stream_info->stream_rings[cur_stream];
694 addr = cur_ring->first_seg->dma;
695 radix_tree_delete(&stream_info->trb_address_map,
696 addr >> TRB_SEGMENT_SHIFT);
697 xhci_ring_free(xhci, cur_ring);
698 stream_info->stream_rings[cur_stream] = NULL;
701 xhci_free_command(xhci, stream_info->free_streams_command);
703 kfree(stream_info->stream_rings);
707 xhci->cmd_ring_reserved_trbs--;
711 * Sets the MaxPStreams field and the Linear Stream Array field.
712 * Sets the dequeue pointer to the stream context array.
714 void xhci_setup_streams_ep_input_ctx(struct xhci_hcd *xhci,
715 struct xhci_ep_ctx *ep_ctx,
716 struct xhci_stream_info *stream_info)
718 u32 max_primary_streams;
719 /* MaxPStreams is the number of stream context array entries, not the
720 * number we're actually using. Must be in 2^(MaxPstreams + 1) format.
721 * fls(0) = 0, fls(0x1) = 1, fls(0x10) = 2, fls(0x100) = 3, etc.
723 max_primary_streams = fls(stream_info->num_stream_ctxs) - 2;
724 xhci_dbg(xhci, "Setting number of stream ctx array entries to %u\n",
725 1 << (max_primary_streams + 1));
726 ep_ctx->ep_info &= cpu_to_le32(~EP_MAXPSTREAMS_MASK);
727 ep_ctx->ep_info |= cpu_to_le32(EP_MAXPSTREAMS(max_primary_streams)
729 ep_ctx->deq = cpu_to_le64(stream_info->ctx_array_dma);
733 * Sets the MaxPStreams field and the Linear Stream Array field to 0.
734 * Reinstalls the "normal" endpoint ring (at its previous dequeue mark,
735 * not at the beginning of the ring).
737 void xhci_setup_no_streams_ep_input_ctx(struct xhci_hcd *xhci,
738 struct xhci_ep_ctx *ep_ctx,
739 struct xhci_virt_ep *ep)
742 ep_ctx->ep_info &= cpu_to_le32(~(EP_MAXPSTREAMS_MASK | EP_HAS_LSA));
743 addr = xhci_trb_virt_to_dma(ep->ring->deq_seg, ep->ring->dequeue);
744 ep_ctx->deq = cpu_to_le64(addr | ep->ring->cycle_state);
747 /* Frees all stream contexts associated with the endpoint,
749 * Caller should fix the endpoint context streams fields.
751 void xhci_free_stream_info(struct xhci_hcd *xhci,
752 struct xhci_stream_info *stream_info)
755 struct xhci_ring *cur_ring;
761 for (cur_stream = 1; cur_stream < stream_info->num_streams;
763 cur_ring = stream_info->stream_rings[cur_stream];
765 addr = cur_ring->first_seg->dma;
766 radix_tree_delete(&stream_info->trb_address_map,
767 addr >> TRB_SEGMENT_SHIFT);
768 xhci_ring_free(xhci, cur_ring);
769 stream_info->stream_rings[cur_stream] = NULL;
772 xhci_free_command(xhci, stream_info->free_streams_command);
773 xhci->cmd_ring_reserved_trbs--;
774 if (stream_info->stream_ctx_array)
775 xhci_free_stream_ctx(xhci,
776 stream_info->num_stream_ctxs,
777 stream_info->stream_ctx_array,
778 stream_info->ctx_array_dma);
781 kfree(stream_info->stream_rings);
786 /***************** Device context manipulation *************************/
788 static void xhci_init_endpoint_timer(struct xhci_hcd *xhci,
789 struct xhci_virt_ep *ep)
791 init_timer(&ep->stop_cmd_timer);
792 ep->stop_cmd_timer.data = (unsigned long) ep;
793 ep->stop_cmd_timer.function = xhci_stop_endpoint_command_watchdog;
797 static void xhci_free_tt_info(struct xhci_hcd *xhci,
798 struct xhci_virt_device *virt_dev,
801 struct list_head *tt_list_head;
802 struct xhci_tt_bw_info *tt_info, *next;
803 bool slot_found = false;
805 /* If the device never made it past the Set Address stage,
806 * it may not have the real_port set correctly.
808 if (virt_dev->real_port == 0 ||
809 virt_dev->real_port > HCS_MAX_PORTS(xhci->hcs_params1)) {
810 xhci_dbg(xhci, "Bad real port.\n");
814 tt_list_head = &(xhci->rh_bw[virt_dev->real_port - 1].tts);
815 list_for_each_entry_safe(tt_info, next, tt_list_head, tt_list) {
816 /* Multi-TT hubs will have more than one entry */
817 if (tt_info->slot_id == slot_id) {
819 list_del(&tt_info->tt_list);
821 } else if (slot_found) {
827 int xhci_alloc_tt_info(struct xhci_hcd *xhci,
828 struct xhci_virt_device *virt_dev,
829 struct usb_device *hdev,
830 struct usb_tt *tt, gfp_t mem_flags)
832 struct xhci_tt_bw_info *tt_info;
833 unsigned int num_ports;
839 num_ports = hdev->maxchild;
841 for (i = 0; i < num_ports; i++, tt_info++) {
842 struct xhci_interval_bw_table *bw_table;
844 tt_info = kzalloc(sizeof(*tt_info), mem_flags);
847 INIT_LIST_HEAD(&tt_info->tt_list);
848 list_add(&tt_info->tt_list,
849 &xhci->rh_bw[virt_dev->real_port - 1].tts);
850 tt_info->slot_id = virt_dev->udev->slot_id;
852 tt_info->ttport = i+1;
853 bw_table = &tt_info->bw_table;
854 for (j = 0; j < XHCI_MAX_INTERVAL; j++)
855 INIT_LIST_HEAD(&bw_table->interval_bw[j].endpoints);
860 xhci_free_tt_info(xhci, virt_dev, virt_dev->udev->slot_id);
865 /* All the xhci_tds in the ring's TD list should be freed at this point.
866 * Should be called with xhci->lock held if there is any chance the TT lists
867 * will be manipulated by the configure endpoint, allocate device, or update
868 * hub functions while this function is removing the TT entries from the list.
870 void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id)
872 struct xhci_virt_device *dev;
874 int old_active_eps = 0;
876 /* Slot ID 0 is reserved */
877 if (slot_id == 0 || !xhci->devs[slot_id])
880 dev = xhci->devs[slot_id];
881 xhci->dcbaa->dev_context_ptrs[slot_id] = 0;
886 old_active_eps = dev->tt_info->active_eps;
888 for (i = 0; i < 31; ++i) {
889 if (dev->eps[i].ring)
890 xhci_ring_free(xhci, dev->eps[i].ring);
891 if (dev->eps[i].stream_info)
892 xhci_free_stream_info(xhci,
893 dev->eps[i].stream_info);
894 /* Endpoints on the TT/root port lists should have been removed
895 * when usb_disable_device() was called for the device.
896 * We can't drop them anyway, because the udev might have gone
897 * away by this point, and we can't tell what speed it was.
899 if (!list_empty(&dev->eps[i].bw_endpoint_list))
900 xhci_warn(xhci, "Slot %u endpoint %u "
901 "not removed from BW list!\n",
904 /* If this is a hub, free the TT(s) from the TT list */
905 xhci_free_tt_info(xhci, dev, slot_id);
906 /* If necessary, update the number of active TTs on this root port */
907 xhci_update_tt_active_eps(xhci, dev, old_active_eps);
909 if (dev->ring_cache) {
910 for (i = 0; i < dev->num_rings_cached; i++)
911 xhci_ring_free(xhci, dev->ring_cache[i]);
912 kfree(dev->ring_cache);
916 xhci_free_container_ctx(xhci, dev->in_ctx);
918 xhci_free_container_ctx(xhci, dev->out_ctx);
920 kfree(xhci->devs[slot_id]);
921 xhci->devs[slot_id] = NULL;
924 int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id,
925 struct usb_device *udev, gfp_t flags)
927 struct xhci_virt_device *dev;
930 /* Slot ID 0 is reserved */
931 if (slot_id == 0 || xhci->devs[slot_id]) {
932 xhci_warn(xhci, "Bad Slot ID %d\n", slot_id);
936 xhci->devs[slot_id] = kzalloc(sizeof(*xhci->devs[slot_id]), flags);
937 if (!xhci->devs[slot_id])
939 dev = xhci->devs[slot_id];
941 /* Allocate the (output) device context that will be used in the HC. */
942 dev->out_ctx = xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_DEVICE, flags);
946 xhci_dbg(xhci, "Slot %d output ctx = 0x%llx (dma)\n", slot_id,
947 (unsigned long long)dev->out_ctx->dma);
949 /* Allocate the (input) device context for address device command */
950 dev->in_ctx = xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_INPUT, flags);
954 xhci_dbg(xhci, "Slot %d input ctx = 0x%llx (dma)\n", slot_id,
955 (unsigned long long)dev->in_ctx->dma);
957 /* Initialize the cancellation list and watchdog timers for each ep */
958 for (i = 0; i < 31; i++) {
959 xhci_init_endpoint_timer(xhci, &dev->eps[i]);
960 INIT_LIST_HEAD(&dev->eps[i].cancelled_td_list);
961 INIT_LIST_HEAD(&dev->eps[i].bw_endpoint_list);
964 /* Allocate endpoint 0 ring */
965 dev->eps[0].ring = xhci_ring_alloc(xhci, 2, 1, TYPE_CTRL, flags);
966 if (!dev->eps[0].ring)
969 /* Allocate pointers to the ring cache */
970 dev->ring_cache = kzalloc(
971 sizeof(struct xhci_ring *)*XHCI_MAX_RINGS_CACHED,
973 if (!dev->ring_cache)
975 dev->num_rings_cached = 0;
977 init_completion(&dev->cmd_completion);
978 INIT_LIST_HEAD(&dev->cmd_list);
981 /* Point to output device context in dcbaa. */
982 xhci->dcbaa->dev_context_ptrs[slot_id] = cpu_to_le64(dev->out_ctx->dma);
983 xhci_dbg(xhci, "Set slot id %d dcbaa entry %p to 0x%llx\n",
985 &xhci->dcbaa->dev_context_ptrs[slot_id],
986 le64_to_cpu(xhci->dcbaa->dev_context_ptrs[slot_id]));
990 xhci_free_virt_device(xhci, slot_id);
994 void xhci_copy_ep0_dequeue_into_input_ctx(struct xhci_hcd *xhci,
995 struct usb_device *udev)
997 struct xhci_virt_device *virt_dev;
998 struct xhci_ep_ctx *ep0_ctx;
999 struct xhci_ring *ep_ring;
1001 virt_dev = xhci->devs[udev->slot_id];
1002 ep0_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, 0);
1003 ep_ring = virt_dev->eps[0].ring;
1005 * FIXME we don't keep track of the dequeue pointer very well after a
1006 * Set TR dequeue pointer, so we're setting the dequeue pointer of the
1007 * host to our enqueue pointer. This should only be called after a
1008 * configured device has reset, so all control transfers should have
1009 * been completed or cancelled before the reset.
1011 ep0_ctx->deq = cpu_to_le64(xhci_trb_virt_to_dma(ep_ring->enq_seg,
1013 | ep_ring->cycle_state);
1017 * The xHCI roothub may have ports of differing speeds in any order in the port
1018 * status registers. xhci->port_array provides an array of the port speed for
1019 * each offset into the port status registers.
1021 * The xHCI hardware wants to know the roothub port number that the USB device
1022 * is attached to (or the roothub port its ancestor hub is attached to). All we
1023 * know is the index of that port under either the USB 2.0 or the USB 3.0
1024 * roothub, but that doesn't give us the real index into the HW port status
1025 * registers. Call xhci_find_raw_port_number() to get real index.
1027 static u32 xhci_find_real_port_number(struct xhci_hcd *xhci,
1028 struct usb_device *udev)
1030 struct usb_device *top_dev;
1031 struct usb_hcd *hcd;
1033 if (udev->speed == USB_SPEED_SUPER)
1034 hcd = xhci->shared_hcd;
1036 hcd = xhci->main_hcd;
1038 for (top_dev = udev; top_dev->parent && top_dev->parent->parent;
1039 top_dev = top_dev->parent)
1040 /* Found device below root hub */;
1042 return xhci_find_raw_port_number(hcd, top_dev->portnum);
1045 /* Setup an xHCI virtual device for a Set Address command */
1046 int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev)
1048 struct xhci_virt_device *dev;
1049 struct xhci_ep_ctx *ep0_ctx;
1050 struct xhci_slot_ctx *slot_ctx;
1052 struct usb_device *top_dev;
1054 dev = xhci->devs[udev->slot_id];
1055 /* Slot ID 0 is reserved */
1056 if (udev->slot_id == 0 || !dev) {
1057 xhci_warn(xhci, "Slot ID %d is not assigned to this device\n",
1061 ep0_ctx = xhci_get_ep_ctx(xhci, dev->in_ctx, 0);
1062 slot_ctx = xhci_get_slot_ctx(xhci, dev->in_ctx);
1064 /* 3) Only the control endpoint is valid - one endpoint context */
1065 slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1) | udev->route);
1066 switch (udev->speed) {
1067 case USB_SPEED_SUPER:
1068 slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_SS);
1070 case USB_SPEED_HIGH:
1071 slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_HS);
1073 case USB_SPEED_FULL:
1074 slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_FS);
1077 slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_LS);
1079 case USB_SPEED_WIRELESS:
1080 xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n");
1084 /* Speed was set earlier, this shouldn't happen. */
1087 /* Find the root hub port this device is under */
1088 port_num = xhci_find_real_port_number(xhci, udev);
1091 slot_ctx->dev_info2 |= cpu_to_le32(ROOT_HUB_PORT(port_num));
1092 /* Set the port number in the virtual_device to the faked port number */
1093 for (top_dev = udev; top_dev->parent && top_dev->parent->parent;
1094 top_dev = top_dev->parent)
1095 /* Found device below root hub */;
1096 dev->fake_port = top_dev->portnum;
1097 dev->real_port = port_num;
1098 xhci_dbg(xhci, "Set root hub portnum to %d\n", port_num);
1099 xhci_dbg(xhci, "Set fake root hub portnum to %d\n", dev->fake_port);
1101 /* Find the right bandwidth table that this device will be a part of.
1102 * If this is a full speed device attached directly to a root port (or a
1103 * decendent of one), it counts as a primary bandwidth domain, not a
1104 * secondary bandwidth domain under a TT. An xhci_tt_info structure
1105 * will never be created for the HS root hub.
1107 if (!udev->tt || !udev->tt->hub->parent) {
1108 dev->bw_table = &xhci->rh_bw[port_num - 1].bw_table;
1110 struct xhci_root_port_bw_info *rh_bw;
1111 struct xhci_tt_bw_info *tt_bw;
1113 rh_bw = &xhci->rh_bw[port_num - 1];
1114 /* Find the right TT. */
1115 list_for_each_entry(tt_bw, &rh_bw->tts, tt_list) {
1116 if (tt_bw->slot_id != udev->tt->hub->slot_id)
1119 if (!dev->udev->tt->multi ||
1121 tt_bw->ttport == dev->udev->ttport)) {
1122 dev->bw_table = &tt_bw->bw_table;
1123 dev->tt_info = tt_bw;
1128 xhci_warn(xhci, "WARN: Didn't find a matching TT\n");
1131 /* Is this a LS/FS device under an external HS hub? */
1132 if (udev->tt && udev->tt->hub->parent) {
1133 slot_ctx->tt_info = cpu_to_le32(udev->tt->hub->slot_id |
1134 (udev->ttport << 8));
1135 if (udev->tt->multi)
1136 slot_ctx->dev_info |= cpu_to_le32(DEV_MTT);
1138 xhci_dbg(xhci, "udev->tt = %p\n", udev->tt);
1139 xhci_dbg(xhci, "udev->ttport = 0x%x\n", udev->ttport);
1141 /* Step 4 - ring already allocated */
1143 ep0_ctx->ep_info2 = cpu_to_le32(EP_TYPE(CTRL_EP));
1145 * XXX: Not sure about wireless USB devices.
1147 switch (udev->speed) {
1148 case USB_SPEED_SUPER:
1149 ep0_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(512));
1151 case USB_SPEED_HIGH:
1152 /* USB core guesses at a 64-byte max packet first for FS devices */
1153 case USB_SPEED_FULL:
1154 ep0_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(64));
1157 ep0_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(8));
1159 case USB_SPEED_WIRELESS:
1160 xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n");
1167 /* EP 0 can handle "burst" sizes of 1, so Max Burst Size field is 0 */
1168 ep0_ctx->ep_info2 |= cpu_to_le32(MAX_BURST(0) | ERROR_COUNT(3));
1170 ep0_ctx->deq = cpu_to_le64(dev->eps[0].ring->first_seg->dma |
1171 dev->eps[0].ring->cycle_state);
1173 /* Steps 7 and 8 were done in xhci_alloc_virt_device() */
1179 * Convert interval expressed as 2^(bInterval - 1) == interval into
1180 * straight exponent value 2^n == interval.
1183 static unsigned int xhci_parse_exponent_interval(struct usb_device *udev,
1184 struct usb_host_endpoint *ep)
1186 unsigned int interval;
1188 interval = clamp_val(ep->desc.bInterval, 1, 16) - 1;
1189 if (interval != ep->desc.bInterval - 1)
1190 dev_warn(&udev->dev,
1191 "ep %#x - rounding interval to %d %sframes\n",
1192 ep->desc.bEndpointAddress,
1194 udev->speed == USB_SPEED_FULL ? "" : "micro");
1196 if (udev->speed == USB_SPEED_FULL) {
1198 * Full speed isoc endpoints specify interval in frames,
1199 * not microframes. We are using microframes everywhere,
1200 * so adjust accordingly.
1202 interval += 3; /* 1 frame = 2^3 uframes */
1209 * Convert bInterval expressed in microframes (in 1-255 range) to exponent of
1210 * microframes, rounded down to nearest power of 2.
1212 static unsigned int xhci_microframes_to_exponent(struct usb_device *udev,
1213 struct usb_host_endpoint *ep, unsigned int desc_interval,
1214 unsigned int min_exponent, unsigned int max_exponent)
1216 unsigned int interval;
1218 interval = fls(desc_interval) - 1;
1219 interval = clamp_val(interval, min_exponent, max_exponent);
1220 if ((1 << interval) != desc_interval)
1221 dev_warn(&udev->dev,
1222 "ep %#x - rounding interval to %d microframes, ep desc says %d microframes\n",
1223 ep->desc.bEndpointAddress,
1230 static unsigned int xhci_parse_microframe_interval(struct usb_device *udev,
1231 struct usb_host_endpoint *ep)
1233 if (ep->desc.bInterval == 0)
1235 return xhci_microframes_to_exponent(udev, ep,
1236 ep->desc.bInterval, 0, 15);
1240 static unsigned int xhci_parse_frame_interval(struct usb_device *udev,
1241 struct usb_host_endpoint *ep)
1243 return xhci_microframes_to_exponent(udev, ep,
1244 ep->desc.bInterval * 8, 3, 10);
1247 /* Return the polling or NAK interval.
1249 * The polling interval is expressed in "microframes". If xHCI's Interval field
1250 * is set to N, it will service the endpoint every 2^(Interval)*125us.
1252 * The NAK interval is one NAK per 1 to 255 microframes, or no NAKs if interval
1255 static unsigned int xhci_get_endpoint_interval(struct usb_device *udev,
1256 struct usb_host_endpoint *ep)
1258 unsigned int interval = 0;
1260 switch (udev->speed) {
1261 case USB_SPEED_HIGH:
1263 if (usb_endpoint_xfer_control(&ep->desc) ||
1264 usb_endpoint_xfer_bulk(&ep->desc)) {
1265 interval = xhci_parse_microframe_interval(udev, ep);
1268 /* Fall through - SS and HS isoc/int have same decoding */
1270 case USB_SPEED_SUPER:
1271 if (usb_endpoint_xfer_int(&ep->desc) ||
1272 usb_endpoint_xfer_isoc(&ep->desc)) {
1273 interval = xhci_parse_exponent_interval(udev, ep);
1277 case USB_SPEED_FULL:
1278 if (usb_endpoint_xfer_isoc(&ep->desc)) {
1279 interval = xhci_parse_exponent_interval(udev, ep);
1283 * Fall through for interrupt endpoint interval decoding
1284 * since it uses the same rules as low speed interrupt
1289 if (usb_endpoint_xfer_int(&ep->desc) ||
1290 usb_endpoint_xfer_isoc(&ep->desc)) {
1292 interval = xhci_parse_frame_interval(udev, ep);
1299 return EP_INTERVAL(interval);
1302 /* The "Mult" field in the endpoint context is only set for SuperSpeed isoc eps.
1303 * High speed endpoint descriptors can define "the number of additional
1304 * transaction opportunities per microframe", but that goes in the Max Burst
1305 * endpoint context field.
1307 static u32 xhci_get_endpoint_mult(struct usb_device *udev,
1308 struct usb_host_endpoint *ep)
1310 if (udev->speed != USB_SPEED_SUPER ||
1311 !usb_endpoint_xfer_isoc(&ep->desc))
1313 return ep->ss_ep_comp.bmAttributes;
1316 static u32 xhci_get_endpoint_type(struct usb_device *udev,
1317 struct usb_host_endpoint *ep)
1322 in = usb_endpoint_dir_in(&ep->desc);
1323 if (usb_endpoint_xfer_control(&ep->desc)) {
1324 type = EP_TYPE(CTRL_EP);
1325 } else if (usb_endpoint_xfer_bulk(&ep->desc)) {
1327 type = EP_TYPE(BULK_IN_EP);
1329 type = EP_TYPE(BULK_OUT_EP);
1330 } else if (usb_endpoint_xfer_isoc(&ep->desc)) {
1332 type = EP_TYPE(ISOC_IN_EP);
1334 type = EP_TYPE(ISOC_OUT_EP);
1335 } else if (usb_endpoint_xfer_int(&ep->desc)) {
1337 type = EP_TYPE(INT_IN_EP);
1339 type = EP_TYPE(INT_OUT_EP);
1346 /* Return the maximum endpoint service interval time (ESIT) payload.
1347 * Basically, this is the maxpacket size, multiplied by the burst size
1350 static u32 xhci_get_max_esit_payload(struct xhci_hcd *xhci,
1351 struct usb_device *udev,
1352 struct usb_host_endpoint *ep)
1357 /* Only applies for interrupt or isochronous endpoints */
1358 if (usb_endpoint_xfer_control(&ep->desc) ||
1359 usb_endpoint_xfer_bulk(&ep->desc))
1362 if (udev->speed == USB_SPEED_SUPER)
1363 return le16_to_cpu(ep->ss_ep_comp.wBytesPerInterval);
1365 max_packet = GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc));
1366 max_burst = (usb_endpoint_maxp(&ep->desc) & 0x1800) >> 11;
1367 /* A 0 in max burst means 1 transfer per ESIT */
1368 return max_packet * (max_burst + 1);
1371 /* Set up an endpoint with one ring segment. Do not allocate stream rings.
1372 * Drivers will have to call usb_alloc_streams() to do that.
1374 int xhci_endpoint_init(struct xhci_hcd *xhci,
1375 struct xhci_virt_device *virt_dev,
1376 struct usb_device *udev,
1377 struct usb_host_endpoint *ep,
1380 unsigned int ep_index;
1381 struct xhci_ep_ctx *ep_ctx;
1382 struct xhci_ring *ep_ring;
1383 unsigned int max_packet;
1384 unsigned int max_burst;
1385 enum xhci_ring_type type;
1386 u32 max_esit_payload;
1388 ep_index = xhci_get_endpoint_index(&ep->desc);
1389 ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
1391 type = usb_endpoint_type(&ep->desc);
1392 /* Set up the endpoint ring */
1393 virt_dev->eps[ep_index].new_ring =
1394 xhci_ring_alloc(xhci, 2, 1, type, mem_flags);
1395 if (!virt_dev->eps[ep_index].new_ring) {
1396 /* Attempt to use the ring cache */
1397 if (virt_dev->num_rings_cached == 0)
1399 virt_dev->eps[ep_index].new_ring =
1400 virt_dev->ring_cache[virt_dev->num_rings_cached];
1401 virt_dev->ring_cache[virt_dev->num_rings_cached] = NULL;
1402 virt_dev->num_rings_cached--;
1403 xhci_reinit_cached_ring(xhci, virt_dev->eps[ep_index].new_ring,
1406 virt_dev->eps[ep_index].skip = false;
1407 ep_ring = virt_dev->eps[ep_index].new_ring;
1408 ep_ctx->deq = cpu_to_le64(ep_ring->first_seg->dma | ep_ring->cycle_state);
1410 ep_ctx->ep_info = cpu_to_le32(xhci_get_endpoint_interval(udev, ep)
1411 | EP_MULT(xhci_get_endpoint_mult(udev, ep)));
1413 /* FIXME dig Mult and streams info out of ep companion desc */
1415 /* Allow 3 retries for everything but isoc;
1416 * CErr shall be set to 0 for Isoch endpoints.
1418 if (!usb_endpoint_xfer_isoc(&ep->desc))
1419 ep_ctx->ep_info2 = cpu_to_le32(ERROR_COUNT(3));
1421 ep_ctx->ep_info2 = cpu_to_le32(ERROR_COUNT(0));
1423 ep_ctx->ep_info2 |= cpu_to_le32(xhci_get_endpoint_type(udev, ep));
1425 /* Set the max packet size and max burst */
1426 max_packet = GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc));
1428 switch (udev->speed) {
1429 case USB_SPEED_SUPER:
1430 /* dig out max burst from ep companion desc */
1431 max_burst = ep->ss_ep_comp.bMaxBurst;
1433 case USB_SPEED_HIGH:
1434 /* Some devices get this wrong */
1435 if (usb_endpoint_xfer_bulk(&ep->desc))
1437 /* bits 11:12 specify the number of additional transaction
1438 * opportunities per microframe (USB 2.0, section 9.6.6)
1440 if (usb_endpoint_xfer_isoc(&ep->desc) ||
1441 usb_endpoint_xfer_int(&ep->desc)) {
1442 max_burst = (usb_endpoint_maxp(&ep->desc)
1446 case USB_SPEED_FULL:
1452 ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet) |
1453 MAX_BURST(max_burst));
1454 max_esit_payload = xhci_get_max_esit_payload(xhci, udev, ep);
1455 ep_ctx->tx_info = cpu_to_le32(MAX_ESIT_PAYLOAD_FOR_EP(max_esit_payload));
1458 * XXX no idea how to calculate the average TRB buffer length for bulk
1459 * endpoints, as the driver gives us no clue how big each scatter gather
1460 * list entry (or buffer) is going to be.
1462 * For isochronous and interrupt endpoints, we set it to the max
1463 * available, until we have new API in the USB core to allow drivers to
1464 * declare how much bandwidth they actually need.
1466 * Normally, it would be calculated by taking the total of the buffer
1467 * lengths in the TD and then dividing by the number of TRBs in a TD,
1468 * including link TRBs, No-op TRBs, and Event data TRBs. Since we don't
1469 * use Event Data TRBs, and we don't chain in a link TRB on short
1470 * transfers, we're basically dividing by 1.
1472 * xHCI 1.0 specification indicates that the Average TRB Length should
1473 * be set to 8 for control endpoints.
1475 if (usb_endpoint_xfer_control(&ep->desc) && xhci->hci_version == 0x100)
1476 ep_ctx->tx_info |= cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(8));
1479 cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(max_esit_payload));
1481 /* FIXME Debug endpoint context */
1485 void xhci_endpoint_zero(struct xhci_hcd *xhci,
1486 struct xhci_virt_device *virt_dev,
1487 struct usb_host_endpoint *ep)
1489 unsigned int ep_index;
1490 struct xhci_ep_ctx *ep_ctx;
1492 ep_index = xhci_get_endpoint_index(&ep->desc);
1493 ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
1495 ep_ctx->ep_info = 0;
1496 ep_ctx->ep_info2 = 0;
1498 ep_ctx->tx_info = 0;
1499 /* Don't free the endpoint ring until the set interface or configuration
1504 void xhci_clear_endpoint_bw_info(struct xhci_bw_info *bw_info)
1506 bw_info->ep_interval = 0;
1508 bw_info->num_packets = 0;
1509 bw_info->max_packet_size = 0;
1511 bw_info->max_esit_payload = 0;
1514 void xhci_update_bw_info(struct xhci_hcd *xhci,
1515 struct xhci_container_ctx *in_ctx,
1516 struct xhci_input_control_ctx *ctrl_ctx,
1517 struct xhci_virt_device *virt_dev)
1519 struct xhci_bw_info *bw_info;
1520 struct xhci_ep_ctx *ep_ctx;
1521 unsigned int ep_type;
1524 for (i = 1; i < 31; ++i) {
1525 bw_info = &virt_dev->eps[i].bw_info;
1527 /* We can't tell what endpoint type is being dropped, but
1528 * unconditionally clearing the bandwidth info for non-periodic
1529 * endpoints should be harmless because the info will never be
1530 * set in the first place.
1532 if (!EP_IS_ADDED(ctrl_ctx, i) && EP_IS_DROPPED(ctrl_ctx, i)) {
1533 /* Dropped endpoint */
1534 xhci_clear_endpoint_bw_info(bw_info);
1538 if (EP_IS_ADDED(ctrl_ctx, i)) {
1539 ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, i);
1540 ep_type = CTX_TO_EP_TYPE(le32_to_cpu(ep_ctx->ep_info2));
1542 /* Ignore non-periodic endpoints */
1543 if (ep_type != ISOC_OUT_EP && ep_type != INT_OUT_EP &&
1544 ep_type != ISOC_IN_EP &&
1545 ep_type != INT_IN_EP)
1548 /* Added or changed endpoint */
1549 bw_info->ep_interval = CTX_TO_EP_INTERVAL(
1550 le32_to_cpu(ep_ctx->ep_info));
1551 /* Number of packets and mult are zero-based in the
1552 * input context, but we want one-based for the
1555 bw_info->mult = CTX_TO_EP_MULT(
1556 le32_to_cpu(ep_ctx->ep_info)) + 1;
1557 bw_info->num_packets = CTX_TO_MAX_BURST(
1558 le32_to_cpu(ep_ctx->ep_info2)) + 1;
1559 bw_info->max_packet_size = MAX_PACKET_DECODED(
1560 le32_to_cpu(ep_ctx->ep_info2));
1561 bw_info->type = ep_type;
1562 bw_info->max_esit_payload = CTX_TO_MAX_ESIT_PAYLOAD(
1563 le32_to_cpu(ep_ctx->tx_info));
1568 /* Copy output xhci_ep_ctx to the input xhci_ep_ctx copy.
1569 * Useful when you want to change one particular aspect of the endpoint and then
1570 * issue a configure endpoint command.
1572 void xhci_endpoint_copy(struct xhci_hcd *xhci,
1573 struct xhci_container_ctx *in_ctx,
1574 struct xhci_container_ctx *out_ctx,
1575 unsigned int ep_index)
1577 struct xhci_ep_ctx *out_ep_ctx;
1578 struct xhci_ep_ctx *in_ep_ctx;
1580 out_ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index);
1581 in_ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index);
1583 in_ep_ctx->ep_info = out_ep_ctx->ep_info;
1584 in_ep_ctx->ep_info2 = out_ep_ctx->ep_info2;
1585 in_ep_ctx->deq = out_ep_ctx->deq;
1586 in_ep_ctx->tx_info = out_ep_ctx->tx_info;
1589 /* Copy output xhci_slot_ctx to the input xhci_slot_ctx.
1590 * Useful when you want to change one particular aspect of the endpoint and then
1591 * issue a configure endpoint command. Only the context entries field matters,
1592 * but we'll copy the whole thing anyway.
1594 void xhci_slot_copy(struct xhci_hcd *xhci,
1595 struct xhci_container_ctx *in_ctx,
1596 struct xhci_container_ctx *out_ctx)
1598 struct xhci_slot_ctx *in_slot_ctx;
1599 struct xhci_slot_ctx *out_slot_ctx;
1601 in_slot_ctx = xhci_get_slot_ctx(xhci, in_ctx);
1602 out_slot_ctx = xhci_get_slot_ctx(xhci, out_ctx);
1604 in_slot_ctx->dev_info = out_slot_ctx->dev_info;
1605 in_slot_ctx->dev_info2 = out_slot_ctx->dev_info2;
1606 in_slot_ctx->tt_info = out_slot_ctx->tt_info;
1607 in_slot_ctx->dev_state = out_slot_ctx->dev_state;
1610 /* Set up the scratchpad buffer array and scratchpad buffers, if needed. */
1611 static int scratchpad_alloc(struct xhci_hcd *xhci, gfp_t flags)
1614 struct device *dev = xhci_to_hcd(xhci)->self.controller;
1615 int num_sp = HCS_MAX_SCRATCHPAD(xhci->hcs_params2);
1617 xhci_dbg(xhci, "Allocating %d scratchpad buffers\n", num_sp);
1622 xhci->scratchpad = kzalloc(sizeof(*xhci->scratchpad), flags);
1623 if (!xhci->scratchpad)
1626 xhci->scratchpad->sp_array = dma_alloc_coherent(dev,
1627 num_sp * sizeof(u64),
1628 &xhci->scratchpad->sp_dma, flags);
1629 if (!xhci->scratchpad->sp_array)
1632 xhci->scratchpad->sp_buffers = kzalloc(sizeof(void *) * num_sp, flags);
1633 if (!xhci->scratchpad->sp_buffers)
1636 xhci->scratchpad->sp_dma_buffers =
1637 kzalloc(sizeof(dma_addr_t) * num_sp, flags);
1639 if (!xhci->scratchpad->sp_dma_buffers)
1642 xhci->dcbaa->dev_context_ptrs[0] = cpu_to_le64(xhci->scratchpad->sp_dma);
1643 for (i = 0; i < num_sp; i++) {
1645 void *buf = dma_alloc_coherent(dev, xhci->page_size, &dma,
1650 xhci->scratchpad->sp_array[i] = dma;
1651 xhci->scratchpad->sp_buffers[i] = buf;
1652 xhci->scratchpad->sp_dma_buffers[i] = dma;
1658 for (i = i - 1; i >= 0; i--) {
1659 dma_free_coherent(dev, xhci->page_size,
1660 xhci->scratchpad->sp_buffers[i],
1661 xhci->scratchpad->sp_dma_buffers[i]);
1663 kfree(xhci->scratchpad->sp_dma_buffers);
1666 kfree(xhci->scratchpad->sp_buffers);
1669 dma_free_coherent(dev, num_sp * sizeof(u64),
1670 xhci->scratchpad->sp_array,
1671 xhci->scratchpad->sp_dma);
1674 kfree(xhci->scratchpad);
1675 xhci->scratchpad = NULL;
1681 static void scratchpad_free(struct xhci_hcd *xhci)
1685 struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
1687 if (!xhci->scratchpad)
1690 num_sp = HCS_MAX_SCRATCHPAD(xhci->hcs_params2);
1692 for (i = 0; i < num_sp; i++) {
1693 dma_free_coherent(&pdev->dev, xhci->page_size,
1694 xhci->scratchpad->sp_buffers[i],
1695 xhci->scratchpad->sp_dma_buffers[i]);
1697 kfree(xhci->scratchpad->sp_dma_buffers);
1698 kfree(xhci->scratchpad->sp_buffers);
1699 dma_free_coherent(&pdev->dev, num_sp * sizeof(u64),
1700 xhci->scratchpad->sp_array,
1701 xhci->scratchpad->sp_dma);
1702 kfree(xhci->scratchpad);
1703 xhci->scratchpad = NULL;
1706 struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci,
1707 bool allocate_in_ctx, bool allocate_completion,
1710 struct xhci_command *command;
1712 command = kzalloc(sizeof(*command), mem_flags);
1716 if (allocate_in_ctx) {
1718 xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_INPUT,
1720 if (!command->in_ctx) {
1726 if (allocate_completion) {
1727 command->completion =
1728 kzalloc(sizeof(struct completion), mem_flags);
1729 if (!command->completion) {
1730 xhci_free_container_ctx(xhci, command->in_ctx);
1734 init_completion(command->completion);
1737 command->status = 0;
1738 INIT_LIST_HEAD(&command->cmd_list);
1742 void xhci_urb_free_priv(struct xhci_hcd *xhci, struct urb_priv *urb_priv)
1745 kfree(urb_priv->td[0]);
1750 void xhci_free_command(struct xhci_hcd *xhci,
1751 struct xhci_command *command)
1753 xhci_free_container_ctx(xhci,
1755 kfree(command->completion);
1759 void xhci_mem_cleanup(struct xhci_hcd *xhci)
1761 struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
1762 struct dev_info *dev_info, *next;
1763 struct xhci_cd *cur_cd, *next_cd;
1764 unsigned long flags;
1766 int i, j, num_ports;
1768 /* Free the Event Ring Segment Table and the actual Event Ring */
1769 size = sizeof(struct xhci_erst_entry)*(xhci->erst.num_entries);
1770 if (xhci->erst.entries)
1771 dma_free_coherent(&pdev->dev, size,
1772 xhci->erst.entries, xhci->erst.erst_dma_addr);
1773 xhci->erst.entries = NULL;
1774 xhci_dbg(xhci, "Freed ERST\n");
1775 if (xhci->event_ring)
1776 xhci_ring_free(xhci, xhci->event_ring);
1777 xhci->event_ring = NULL;
1778 xhci_dbg(xhci, "Freed event ring\n");
1780 if (xhci->lpm_command)
1781 xhci_free_command(xhci, xhci->lpm_command);
1782 xhci->cmd_ring_reserved_trbs = 0;
1784 xhci_ring_free(xhci, xhci->cmd_ring);
1785 xhci->cmd_ring = NULL;
1786 xhci_dbg(xhci, "Freed command ring\n");
1787 list_for_each_entry_safe(cur_cd, next_cd,
1788 &xhci->cancel_cmd_list, cancel_cmd_list) {
1789 list_del(&cur_cd->cancel_cmd_list);
1793 for (i = 1; i < MAX_HC_SLOTS; ++i)
1794 xhci_free_virt_device(xhci, i);
1796 if (xhci->segment_pool)
1797 dma_pool_destroy(xhci->segment_pool);
1798 xhci->segment_pool = NULL;
1799 xhci_dbg(xhci, "Freed segment pool\n");
1801 if (xhci->device_pool)
1802 dma_pool_destroy(xhci->device_pool);
1803 xhci->device_pool = NULL;
1804 xhci_dbg(xhci, "Freed device context pool\n");
1806 if (xhci->small_streams_pool)
1807 dma_pool_destroy(xhci->small_streams_pool);
1808 xhci->small_streams_pool = NULL;
1809 xhci_dbg(xhci, "Freed small stream array pool\n");
1811 if (xhci->medium_streams_pool)
1812 dma_pool_destroy(xhci->medium_streams_pool);
1813 xhci->medium_streams_pool = NULL;
1814 xhci_dbg(xhci, "Freed medium stream array pool\n");
1817 dma_free_coherent(&pdev->dev, sizeof(*xhci->dcbaa),
1818 xhci->dcbaa, xhci->dcbaa->dma);
1821 scratchpad_free(xhci);
1823 spin_lock_irqsave(&xhci->lock, flags);
1824 list_for_each_entry_safe(dev_info, next, &xhci->lpm_failed_devs, list) {
1825 list_del(&dev_info->list);
1828 spin_unlock_irqrestore(&xhci->lock, flags);
1833 num_ports = HCS_MAX_PORTS(xhci->hcs_params1);
1834 for (i = 0; i < num_ports; i++) {
1835 struct xhci_interval_bw_table *bwt = &xhci->rh_bw[i].bw_table;
1836 for (j = 0; j < XHCI_MAX_INTERVAL; j++) {
1837 struct list_head *ep = &bwt->interval_bw[j].endpoints;
1838 while (!list_empty(ep))
1839 list_del_init(ep->next);
1843 for (i = 0; i < num_ports; i++) {
1844 struct xhci_tt_bw_info *tt, *n;
1845 list_for_each_entry_safe(tt, n, &xhci->rh_bw[i].tts, tt_list) {
1846 list_del(&tt->tt_list);
1852 xhci->num_usb2_ports = 0;
1853 xhci->num_usb3_ports = 0;
1854 xhci->num_active_eps = 0;
1855 kfree(xhci->usb2_ports);
1856 kfree(xhci->usb3_ports);
1857 kfree(xhci->port_array);
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)
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 /* Check the host's USB2 LPM capability */
2072 if ((xhci->hci_version == 0x96) && (major_revision != 0x03) &&
2073 (temp & XHCI_L1C)) {
2074 xhci_dbg(xhci, "xHCI 0.96: support USB2 software lpm\n");
2075 xhci->sw_lpm_support = 1;
2078 if ((xhci->hci_version >= 0x100) && (major_revision != 0x03)) {
2079 xhci_dbg(xhci, "xHCI 1.0: support USB2 software lpm\n");
2080 xhci->sw_lpm_support = 1;
2081 if (temp & XHCI_HLC) {
2082 xhci_dbg(xhci, "xHCI 1.0: support USB2 hardware lpm\n");
2083 xhci->hw_lpm_support = 1;
2088 for (i = port_offset; i < (port_offset + port_count); i++) {
2089 /* Duplicate entry. Ignore the port if the revisions differ. */
2090 if (xhci->port_array[i] != 0) {
2091 xhci_warn(xhci, "Duplicate port entry, Ext Cap %p,"
2092 " port %u\n", addr, i);
2093 xhci_warn(xhci, "Port was marked as USB %u, "
2094 "duplicated as USB %u\n",
2095 xhci->port_array[i], major_revision);
2096 /* Only adjust the roothub port counts if we haven't
2097 * found a similar duplicate.
2099 if (xhci->port_array[i] != major_revision &&
2100 xhci->port_array[i] != DUPLICATE_ENTRY) {
2101 if (xhci->port_array[i] == 0x03)
2102 xhci->num_usb3_ports--;
2104 xhci->num_usb2_ports--;
2105 xhci->port_array[i] = DUPLICATE_ENTRY;
2107 /* FIXME: Should we disable the port? */
2110 xhci->port_array[i] = major_revision;
2111 if (major_revision == 0x03)
2112 xhci->num_usb3_ports++;
2114 xhci->num_usb2_ports++;
2116 /* FIXME: Should we disable ports not in the Extended Capabilities? */
2120 * Scan the Extended Capabilities for the "Supported Protocol Capabilities" that
2121 * specify what speeds each port is supposed to be. We can't count on the port
2122 * speed bits in the PORTSC register being correct until a device is connected,
2123 * but we need to set up the two fake roothubs with the correct number of USB
2124 * 3.0 and USB 2.0 ports at host controller initialization time.
2126 static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags)
2128 __le32 __iomem *addr;
2130 unsigned int num_ports;
2131 int i, j, port_index;
2133 addr = &xhci->cap_regs->hcc_params;
2134 offset = XHCI_HCC_EXT_CAPS(xhci_readl(xhci, addr));
2136 xhci_err(xhci, "No Extended Capability registers, "
2137 "unable to set up roothub.\n");
2141 num_ports = HCS_MAX_PORTS(xhci->hcs_params1);
2142 xhci->port_array = kzalloc(sizeof(*xhci->port_array)*num_ports, flags);
2143 if (!xhci->port_array)
2146 xhci->rh_bw = kzalloc(sizeof(*xhci->rh_bw)*num_ports, flags);
2149 for (i = 0; i < num_ports; i++) {
2150 struct xhci_interval_bw_table *bw_table;
2152 INIT_LIST_HEAD(&xhci->rh_bw[i].tts);
2153 bw_table = &xhci->rh_bw[i].bw_table;
2154 for (j = 0; j < XHCI_MAX_INTERVAL; j++)
2155 INIT_LIST_HEAD(&bw_table->interval_bw[j].endpoints);
2159 * For whatever reason, the first capability offset is from the
2160 * capability register base, not from the HCCPARAMS register.
2161 * See section 5.3.6 for offset calculation.
2163 addr = &xhci->cap_regs->hc_capbase + offset;
2167 cap_id = xhci_readl(xhci, addr);
2168 if (XHCI_EXT_CAPS_ID(cap_id) == XHCI_EXT_CAPS_PROTOCOL)
2169 xhci_add_in_port(xhci, num_ports, addr,
2170 (u8) XHCI_EXT_PORT_MAJOR(cap_id));
2171 offset = XHCI_EXT_CAPS_NEXT(cap_id);
2172 if (!offset || (xhci->num_usb2_ports + xhci->num_usb3_ports)
2176 * Once you're into the Extended Capabilities, the offset is
2177 * always relative to the register holding the offset.
2182 if (xhci->num_usb2_ports == 0 && xhci->num_usb3_ports == 0) {
2183 xhci_warn(xhci, "No ports on the roothubs?\n");
2186 xhci_dbg(xhci, "Found %u USB 2.0 ports and %u USB 3.0 ports.\n",
2187 xhci->num_usb2_ports, xhci->num_usb3_ports);
2189 /* Place limits on the number of roothub ports so that the hub
2190 * descriptors aren't longer than the USB core will allocate.
2192 if (xhci->num_usb3_ports > 15) {
2193 xhci_dbg(xhci, "Limiting USB 3.0 roothub ports to 15.\n");
2194 xhci->num_usb3_ports = 15;
2196 if (xhci->num_usb2_ports > USB_MAXCHILDREN) {
2197 xhci_dbg(xhci, "Limiting USB 2.0 roothub ports to %u.\n",
2199 xhci->num_usb2_ports = USB_MAXCHILDREN;
2203 * Note we could have all USB 3.0 ports, or all USB 2.0 ports.
2204 * Not sure how the USB core will handle a hub with no ports...
2206 if (xhci->num_usb2_ports) {
2207 xhci->usb2_ports = kmalloc(sizeof(*xhci->usb2_ports)*
2208 xhci->num_usb2_ports, flags);
2209 if (!xhci->usb2_ports)
2213 for (i = 0; i < num_ports; i++) {
2214 if (xhci->port_array[i] == 0x03 ||
2215 xhci->port_array[i] == 0 ||
2216 xhci->port_array[i] == DUPLICATE_ENTRY)
2219 xhci->usb2_ports[port_index] =
2220 &xhci->op_regs->port_status_base +
2222 xhci_dbg(xhci, "USB 2.0 port at index %u, "
2224 xhci->usb2_ports[port_index]);
2226 if (port_index == xhci->num_usb2_ports)
2230 if (xhci->num_usb3_ports) {
2231 xhci->usb3_ports = kmalloc(sizeof(*xhci->usb3_ports)*
2232 xhci->num_usb3_ports, flags);
2233 if (!xhci->usb3_ports)
2237 for (i = 0; i < num_ports; i++)
2238 if (xhci->port_array[i] == 0x03) {
2239 xhci->usb3_ports[port_index] =
2240 &xhci->op_regs->port_status_base +
2242 xhci_dbg(xhci, "USB 3.0 port at index %u, "
2244 xhci->usb3_ports[port_index]);
2246 if (port_index == xhci->num_usb3_ports)
2253 int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
2256 struct device *dev = xhci_to_hcd(xhci)->self.controller;
2257 unsigned int val, val2;
2259 struct xhci_segment *seg;
2260 u32 page_size, temp;
2263 INIT_LIST_HEAD(&xhci->lpm_failed_devs);
2264 INIT_LIST_HEAD(&xhci->cancel_cmd_list);
2266 page_size = xhci_readl(xhci, &xhci->op_regs->page_size);
2267 xhci_dbg(xhci, "Supported page size register = 0x%x\n", page_size);
2268 for (i = 0; i < 16; i++) {
2269 if ((0x1 & page_size) != 0)
2271 page_size = page_size >> 1;
2274 xhci_dbg(xhci, "Supported page size of %iK\n", (1 << (i+12)) / 1024);
2276 xhci_warn(xhci, "WARN: no supported page size\n");
2277 /* Use 4K pages, since that's common and the minimum the HC supports */
2278 xhci->page_shift = 12;
2279 xhci->page_size = 1 << xhci->page_shift;
2280 xhci_dbg(xhci, "HCD page size set to %iK\n", xhci->page_size / 1024);
2283 * Program the Number of Device Slots Enabled field in the CONFIG
2284 * register with the max value of slots the HC can handle.
2286 val = HCS_MAX_SLOTS(xhci_readl(xhci, &xhci->cap_regs->hcs_params1));
2287 xhci_dbg(xhci, "// xHC can handle at most %d device slots.\n",
2288 (unsigned int) val);
2289 val2 = xhci_readl(xhci, &xhci->op_regs->config_reg);
2290 val |= (val2 & ~HCS_SLOTS_MASK);
2291 xhci_dbg(xhci, "// Setting Max device slots reg = 0x%x.\n",
2292 (unsigned int) val);
2293 xhci_writel(xhci, val, &xhci->op_regs->config_reg);
2296 * Section 5.4.8 - doorbell array must be
2297 * "physically contiguous and 64-byte (cache line) aligned".
2299 xhci->dcbaa = dma_alloc_coherent(dev, sizeof(*xhci->dcbaa), &dma,
2303 memset(xhci->dcbaa, 0, sizeof *(xhci->dcbaa));
2304 xhci->dcbaa->dma = dma;
2305 xhci_dbg(xhci, "// Device context base array address = 0x%llx (DMA), %p (virt)\n",
2306 (unsigned long long)xhci->dcbaa->dma, xhci->dcbaa);
2307 xhci_write_64(xhci, dma, &xhci->op_regs->dcbaa_ptr);
2310 * Initialize the ring segment pool. The ring must be a contiguous
2311 * structure comprised of TRBs. The TRBs must be 16 byte aligned,
2312 * however, the command ring segment needs 64-byte aligned segments,
2313 * so we pick the greater alignment need.
2315 xhci->segment_pool = dma_pool_create("xHCI ring segments", dev,
2316 TRB_SEGMENT_SIZE, 64, xhci->page_size);
2318 /* See Table 46 and Note on Figure 55 */
2319 xhci->device_pool = dma_pool_create("xHCI input/output contexts", dev,
2320 2112, 64, xhci->page_size);
2321 if (!xhci->segment_pool || !xhci->device_pool)
2324 /* Linear stream context arrays don't have any boundary restrictions,
2325 * and only need to be 16-byte aligned.
2327 xhci->small_streams_pool =
2328 dma_pool_create("xHCI 256 byte stream ctx arrays",
2329 dev, SMALL_STREAM_ARRAY_SIZE, 16, 0);
2330 xhci->medium_streams_pool =
2331 dma_pool_create("xHCI 1KB stream ctx arrays",
2332 dev, MEDIUM_STREAM_ARRAY_SIZE, 16, 0);
2333 /* Any stream context array bigger than MEDIUM_STREAM_ARRAY_SIZE
2334 * will be allocated with dma_alloc_coherent()
2337 if (!xhci->small_streams_pool || !xhci->medium_streams_pool)
2340 /* Set up the command ring to have one segments for now. */
2341 xhci->cmd_ring = xhci_ring_alloc(xhci, 1, 1, TYPE_COMMAND, flags);
2342 if (!xhci->cmd_ring)
2344 xhci_dbg(xhci, "Allocated command ring at %p\n", xhci->cmd_ring);
2345 xhci_dbg(xhci, "First segment DMA is 0x%llx\n",
2346 (unsigned long long)xhci->cmd_ring->first_seg->dma);
2348 /* Set the address in the Command Ring Control register */
2349 val_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring);
2350 val_64 = (val_64 & (u64) CMD_RING_RSVD_BITS) |
2351 (xhci->cmd_ring->first_seg->dma & (u64) ~CMD_RING_RSVD_BITS) |
2352 xhci->cmd_ring->cycle_state;
2353 xhci_dbg(xhci, "// Setting command ring address to 0x%x\n", val);
2354 xhci_write_64(xhci, val_64, &xhci->op_regs->cmd_ring);
2355 xhci_dbg_cmd_ptrs(xhci);
2357 xhci->lpm_command = xhci_alloc_command(xhci, true, true, flags);
2358 if (!xhci->lpm_command)
2361 /* Reserve one command ring TRB for disabling LPM.
2362 * Since the USB core grabs the shared usb_bus bandwidth mutex before
2363 * disabling LPM, we only need to reserve one TRB for all devices.
2365 xhci->cmd_ring_reserved_trbs++;
2367 val = xhci_readl(xhci, &xhci->cap_regs->db_off);
2369 xhci_dbg(xhci, "// Doorbell array is located at offset 0x%x"
2370 " from cap regs base addr\n", val);
2371 xhci->dba = (void __iomem *) xhci->cap_regs + val;
2372 xhci_dbg_regs(xhci);
2373 xhci_print_run_regs(xhci);
2374 /* Set ir_set to interrupt register set 0 */
2375 xhci->ir_set = &xhci->run_regs->ir_set[0];
2378 * Event ring setup: Allocate a normal ring, but also setup
2379 * the event ring segment table (ERST). Section 4.9.3.
2381 xhci_dbg(xhci, "// Allocating event ring\n");
2382 xhci->event_ring = xhci_ring_alloc(xhci, ERST_NUM_SEGS, 1, TYPE_EVENT,
2384 if (!xhci->event_ring)
2386 if (xhci_check_trb_in_td_math(xhci, flags) < 0)
2389 xhci->erst.entries = dma_alloc_coherent(dev,
2390 sizeof(struct xhci_erst_entry) * ERST_NUM_SEGS, &dma,
2392 if (!xhci->erst.entries)
2394 xhci_dbg(xhci, "// Allocated event ring segment table at 0x%llx\n",
2395 (unsigned long long)dma);
2397 memset(xhci->erst.entries, 0, sizeof(struct xhci_erst_entry)*ERST_NUM_SEGS);
2398 xhci->erst.num_entries = ERST_NUM_SEGS;
2399 xhci->erst.erst_dma_addr = dma;
2400 xhci_dbg(xhci, "Set ERST to 0; private num segs = %i, virt addr = %p, dma addr = 0x%llx\n",
2401 xhci->erst.num_entries,
2403 (unsigned long long)xhci->erst.erst_dma_addr);
2405 /* set ring base address and size for each segment table entry */
2406 for (val = 0, seg = xhci->event_ring->first_seg; val < ERST_NUM_SEGS; val++) {
2407 struct xhci_erst_entry *entry = &xhci->erst.entries[val];
2408 entry->seg_addr = cpu_to_le64(seg->dma);
2409 entry->seg_size = cpu_to_le32(TRBS_PER_SEGMENT);
2414 /* set ERST count with the number of entries in the segment table */
2415 val = xhci_readl(xhci, &xhci->ir_set->erst_size);
2416 val &= ERST_SIZE_MASK;
2417 val |= ERST_NUM_SEGS;
2418 xhci_dbg(xhci, "// Write ERST size = %i to ir_set 0 (some bits preserved)\n",
2420 xhci_writel(xhci, val, &xhci->ir_set->erst_size);
2422 xhci_dbg(xhci, "// Set ERST entries to point to event ring.\n");
2423 /* set the segment table base address */
2424 xhci_dbg(xhci, "// Set ERST base address for ir_set 0 = 0x%llx\n",
2425 (unsigned long long)xhci->erst.erst_dma_addr);
2426 val_64 = xhci_read_64(xhci, &xhci->ir_set->erst_base);
2427 val_64 &= ERST_PTR_MASK;
2428 val_64 |= (xhci->erst.erst_dma_addr & (u64) ~ERST_PTR_MASK);
2429 xhci_write_64(xhci, val_64, &xhci->ir_set->erst_base);
2431 /* Set the event ring dequeue address */
2432 xhci_set_hc_event_deq(xhci);
2433 xhci_dbg(xhci, "Wrote ERST address to ir_set 0.\n");
2434 xhci_print_ir_set(xhci, 0);
2437 * XXX: Might need to set the Interrupter Moderation Register to
2438 * something other than the default (~1ms minimum between interrupts).
2439 * See section 5.5.1.2.
2441 init_completion(&xhci->addr_dev);
2442 for (i = 0; i < MAX_HC_SLOTS; ++i)
2443 xhci->devs[i] = NULL;
2444 for (i = 0; i < USB_MAXCHILDREN; ++i) {
2445 xhci->bus_state[0].resume_done[i] = 0;
2446 xhci->bus_state[1].resume_done[i] = 0;
2449 if (scratchpad_alloc(xhci, flags))
2451 if (xhci_setup_port_arrays(xhci, flags))
2454 /* Enable USB 3.0 device notifications for function remote wake, which
2455 * is necessary for allowing USB 3.0 devices to do remote wakeup from
2456 * U3 (device suspend).
2458 temp = xhci_readl(xhci, &xhci->op_regs->dev_notification);
2459 temp &= ~DEV_NOTE_MASK;
2460 temp |= DEV_NOTE_FWAKE;
2461 xhci_writel(xhci, temp, &xhci->op_regs->dev_notification);
2466 xhci_warn(xhci, "Couldn't initialize memory\n");
2469 xhci_mem_cleanup(xhci);