Commit | Line | Data |
---|---|---|
66d4eadd SS |
1 | /* |
2 | * xHCI host controller driver | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp. | |
5 | * | |
6 | * Author: Sarah Sharp | |
7 | * Some code borrowed from the Linux EHCI driver. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | * for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software Foundation, | |
20 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
23 | #include <linux/usb.h> | |
0ebbab37 | 24 | #include <linux/pci.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
527c6d7f | 26 | #include <linux/dmapool.h> |
66d4eadd SS |
27 | |
28 | #include "xhci.h" | |
29 | ||
0ebbab37 SS |
30 | /* |
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. | |
33 | * | |
34 | * Section 4.11.1.1: | |
35 | * "All components of all Command and Transfer TRBs shall be initialized to '0'" | |
36 | */ | |
186a7ef1 AX |
37 | static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci, |
38 | unsigned int cycle_state, gfp_t flags) | |
0ebbab37 SS |
39 | { |
40 | struct xhci_segment *seg; | |
41 | dma_addr_t dma; | |
186a7ef1 | 42 | int i; |
0ebbab37 SS |
43 | |
44 | seg = kzalloc(sizeof *seg, flags); | |
45 | if (!seg) | |
326b4810 | 46 | return NULL; |
0ebbab37 SS |
47 | |
48 | seg->trbs = dma_pool_alloc(xhci->segment_pool, flags, &dma); | |
49 | if (!seg->trbs) { | |
50 | kfree(seg); | |
326b4810 | 51 | return NULL; |
0ebbab37 | 52 | } |
0ebbab37 | 53 | |
eb8ccd2b | 54 | memset(seg->trbs, 0, TRB_SEGMENT_SIZE); |
186a7ef1 AX |
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; | |
59 | } | |
0ebbab37 SS |
60 | seg->dma = dma; |
61 | seg->next = NULL; | |
62 | ||
63 | return seg; | |
64 | } | |
65 | ||
66 | static void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg) | |
67 | { | |
0ebbab37 | 68 | if (seg->trbs) { |
0ebbab37 SS |
69 | dma_pool_free(xhci->segment_pool, seg->trbs, seg->dma); |
70 | seg->trbs = NULL; | |
71 | } | |
0ebbab37 SS |
72 | kfree(seg); |
73 | } | |
74 | ||
70d43601 AX |
75 | static void xhci_free_segments_for_ring(struct xhci_hcd *xhci, |
76 | struct xhci_segment *first) | |
77 | { | |
78 | struct xhci_segment *seg; | |
79 | ||
80 | seg = first->next; | |
81 | while (seg != first) { | |
82 | struct xhci_segment *next = seg->next; | |
83 | xhci_segment_free(xhci, seg); | |
84 | seg = next; | |
85 | } | |
86 | xhci_segment_free(xhci, first); | |
87 | } | |
88 | ||
0ebbab37 SS |
89 | /* |
90 | * Make the prev segment point to the next segment. | |
91 | * | |
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. | |
95 | */ | |
96 | static void xhci_link_segments(struct xhci_hcd *xhci, struct xhci_segment *prev, | |
3b72fca0 | 97 | struct xhci_segment *next, enum xhci_ring_type type) |
0ebbab37 SS |
98 | { |
99 | u32 val; | |
100 | ||
101 | if (!prev || !next) | |
102 | return; | |
103 | prev->next = next; | |
3b72fca0 | 104 | if (type != TYPE_EVENT) { |
f5960b69 ME |
105 | prev->trbs[TRBS_PER_SEGMENT-1].link.segment_ptr = |
106 | cpu_to_le64(next->dma); | |
0ebbab37 SS |
107 | |
108 | /* Set the last TRB in the segment to have a TRB type ID of Link TRB */ | |
28ccd296 | 109 | val = le32_to_cpu(prev->trbs[TRBS_PER_SEGMENT-1].link.control); |
0ebbab37 SS |
110 | val &= ~TRB_TYPE_BITMASK; |
111 | val |= TRB_TYPE(TRB_LINK); | |
b0567b3f | 112 | /* Always set the chain bit with 0.95 hardware */ |
7e393a83 AX |
113 | /* Set chain bit for isoc rings on AMD 0.96 host */ |
114 | if (xhci_link_trb_quirk(xhci) || | |
3b72fca0 AX |
115 | (type == TYPE_ISOC && |
116 | (xhci->quirks & XHCI_AMD_0x96_HOST))) | |
b0567b3f | 117 | val |= TRB_CHAIN; |
28ccd296 | 118 | prev->trbs[TRBS_PER_SEGMENT-1].link.control = cpu_to_le32(val); |
0ebbab37 | 119 | } |
0ebbab37 SS |
120 | } |
121 | ||
8dfec614 AX |
122 | /* |
123 | * Link the ring to the new segments. | |
124 | * Set Toggle Cycle for the new ring if needed. | |
125 | */ | |
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) | |
129 | { | |
130 | struct xhci_segment *next; | |
131 | ||
132 | if (!ring || !first || !last) | |
133 | return; | |
134 | ||
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; | |
140 | ||
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; | |
147 | } | |
148 | } | |
149 | ||
0ebbab37 | 150 | /* XXX: Do we need the hcd structure in all these functions? */ |
f94e0186 | 151 | void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring) |
0ebbab37 | 152 | { |
0e6c7f74 | 153 | if (!ring) |
0ebbab37 | 154 | return; |
70d43601 AX |
155 | |
156 | if (ring->first_seg) | |
157 | xhci_free_segments_for_ring(xhci, ring->first_seg); | |
158 | ||
0ebbab37 SS |
159 | kfree(ring); |
160 | } | |
161 | ||
186a7ef1 AX |
162 | static void xhci_initialize_ring_info(struct xhci_ring *ring, |
163 | unsigned int cycle_state) | |
74f9fe21 SS |
164 | { |
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. | |
186a7ef1 AX |
173 | * |
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. | |
74f9fe21 | 176 | */ |
186a7ef1 | 177 | ring->cycle_state = cycle_state; |
74f9fe21 SS |
178 | /* Not necessary for new rings, but needed for re-initialized rings */ |
179 | ring->enq_updates = 0; | |
180 | ring->deq_updates = 0; | |
b008df60 AX |
181 | |
182 | /* | |
183 | * Each segment has a link TRB, and leave an extra TRB for SW | |
184 | * accounting purpose | |
185 | */ | |
186 | ring->num_trbs_free = ring->num_segs * (TRBS_PER_SEGMENT - 1) - 1; | |
74f9fe21 SS |
187 | } |
188 | ||
70d43601 AX |
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, | |
186a7ef1 AX |
192 | unsigned int num_segs, unsigned int cycle_state, |
193 | enum xhci_ring_type type, gfp_t flags) | |
70d43601 AX |
194 | { |
195 | struct xhci_segment *prev; | |
196 | ||
186a7ef1 | 197 | prev = xhci_segment_alloc(xhci, cycle_state, flags); |
70d43601 AX |
198 | if (!prev) |
199 | return -ENOMEM; | |
200 | num_segs--; | |
201 | ||
202 | *first = prev; | |
203 | while (num_segs > 0) { | |
204 | struct xhci_segment *next; | |
205 | ||
186a7ef1 | 206 | next = xhci_segment_alloc(xhci, cycle_state, flags); |
70d43601 | 207 | if (!next) { |
68e5254a JW |
208 | prev = *first; |
209 | while (prev) { | |
210 | next = prev->next; | |
211 | xhci_segment_free(xhci, prev); | |
212 | prev = next; | |
213 | } | |
70d43601 AX |
214 | return -ENOMEM; |
215 | } | |
216 | xhci_link_segments(xhci, prev, next, type); | |
217 | ||
218 | prev = next; | |
219 | num_segs--; | |
220 | } | |
221 | xhci_link_segments(xhci, prev, *first, type); | |
222 | *last = prev; | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
0ebbab37 SS |
227 | /** |
228 | * Create a new ring with zero or more segments. | |
229 | * | |
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. | |
233 | */ | |
234 | static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci, | |
186a7ef1 AX |
235 | unsigned int num_segs, unsigned int cycle_state, |
236 | enum xhci_ring_type type, gfp_t flags) | |
0ebbab37 SS |
237 | { |
238 | struct xhci_ring *ring; | |
70d43601 | 239 | int ret; |
0ebbab37 SS |
240 | |
241 | ring = kzalloc(sizeof *(ring), flags); | |
0ebbab37 | 242 | if (!ring) |
326b4810 | 243 | return NULL; |
0ebbab37 | 244 | |
3fe4fe08 | 245 | ring->num_segs = num_segs; |
d0e96f5a | 246 | INIT_LIST_HEAD(&ring->td_list); |
3b72fca0 | 247 | ring->type = type; |
0ebbab37 SS |
248 | if (num_segs == 0) |
249 | return ring; | |
250 | ||
70d43601 | 251 | ret = xhci_alloc_segments_for_ring(xhci, &ring->first_seg, |
186a7ef1 | 252 | &ring->last_seg, num_segs, cycle_state, type, flags); |
70d43601 | 253 | if (ret) |
0ebbab37 | 254 | goto fail; |
0ebbab37 | 255 | |
3b72fca0 AX |
256 | /* Only event ring does not use link TRB */ |
257 | if (type != TYPE_EVENT) { | |
0ebbab37 | 258 | /* See section 4.9.2.1 and 6.4.4.1 */ |
70d43601 | 259 | ring->last_seg->trbs[TRBS_PER_SEGMENT - 1].link.control |= |
f5960b69 | 260 | cpu_to_le32(LINK_TOGGLE); |
0ebbab37 | 261 | } |
186a7ef1 | 262 | xhci_initialize_ring_info(ring, cycle_state); |
0ebbab37 SS |
263 | return ring; |
264 | ||
265 | fail: | |
68e5254a | 266 | kfree(ring); |
326b4810 | 267 | return NULL; |
0ebbab37 SS |
268 | } |
269 | ||
412566bd SS |
270 | void xhci_free_or_cache_endpoint_ring(struct xhci_hcd *xhci, |
271 | struct xhci_virt_device *virt_dev, | |
272 | unsigned int ep_index) | |
273 | { | |
274 | int rings_cached; | |
275 | ||
276 | rings_cached = virt_dev->num_rings_cached; | |
277 | if (rings_cached < XHCI_MAX_RINGS_CACHED) { | |
412566bd SS |
278 | virt_dev->ring_cache[rings_cached] = |
279 | virt_dev->eps[ep_index].ring; | |
30f89ca0 | 280 | virt_dev->num_rings_cached++; |
412566bd SS |
281 | xhci_dbg(xhci, "Cached old ring, " |
282 | "%d ring%s cached\n", | |
30f89ca0 SS |
283 | virt_dev->num_rings_cached, |
284 | (virt_dev->num_rings_cached > 1) ? "s" : ""); | |
412566bd SS |
285 | } else { |
286 | xhci_ring_free(xhci, virt_dev->eps[ep_index].ring); | |
287 | xhci_dbg(xhci, "Ring cache full (%d rings), " | |
288 | "freeing ring\n", | |
289 | virt_dev->num_rings_cached); | |
290 | } | |
291 | virt_dev->eps[ep_index].ring = NULL; | |
292 | } | |
293 | ||
74f9fe21 SS |
294 | /* Zero an endpoint ring (except for link TRBs) and move the enqueue and dequeue |
295 | * pointers to the beginning of the ring. | |
296 | */ | |
297 | static void xhci_reinit_cached_ring(struct xhci_hcd *xhci, | |
186a7ef1 AX |
298 | struct xhci_ring *ring, unsigned int cycle_state, |
299 | enum xhci_ring_type type) | |
74f9fe21 SS |
300 | { |
301 | struct xhci_segment *seg = ring->first_seg; | |
186a7ef1 AX |
302 | int i; |
303 | ||
74f9fe21 SS |
304 | do { |
305 | memset(seg->trbs, 0, | |
306 | sizeof(union xhci_trb)*TRBS_PER_SEGMENT); | |
186a7ef1 AX |
307 | if (cycle_state == 0) { |
308 | for (i = 0; i < TRBS_PER_SEGMENT; i++) | |
309 | seg->trbs[i].link.control |= TRB_CYCLE; | |
310 | } | |
74f9fe21 | 311 | /* All endpoint rings have link TRBs */ |
3b72fca0 | 312 | xhci_link_segments(xhci, seg, seg->next, type); |
74f9fe21 SS |
313 | seg = seg->next; |
314 | } while (seg != ring->first_seg); | |
3b72fca0 | 315 | ring->type = type; |
186a7ef1 | 316 | xhci_initialize_ring_info(ring, cycle_state); |
74f9fe21 SS |
317 | /* td list should be empty since all URBs have been cancelled, |
318 | * but just in case... | |
319 | */ | |
320 | INIT_LIST_HEAD(&ring->td_list); | |
321 | } | |
322 | ||
8dfec614 AX |
323 | /* |
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. | |
327 | */ | |
328 | int xhci_ring_expansion(struct xhci_hcd *xhci, struct xhci_ring *ring, | |
329 | unsigned int num_trbs, gfp_t flags) | |
330 | { | |
331 | struct xhci_segment *first; | |
332 | struct xhci_segment *last; | |
333 | unsigned int num_segs; | |
334 | unsigned int num_segs_needed; | |
335 | int ret; | |
336 | ||
337 | num_segs_needed = (num_trbs + (TRBS_PER_SEGMENT - 1) - 1) / | |
338 | (TRBS_PER_SEGMENT - 1); | |
339 | ||
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; | |
343 | ||
344 | ret = xhci_alloc_segments_for_ring(xhci, &first, &last, | |
345 | num_segs, ring->cycle_state, ring->type, flags); | |
346 | if (ret) | |
347 | return -ENOMEM; | |
348 | ||
349 | xhci_link_rings(xhci, ring, first, last, num_segs); | |
350 | xhci_dbg(xhci, "ring expansion succeed, now has %d segments\n", | |
351 | ring->num_segs); | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
d115b048 JY |
356 | #define CTX_SIZE(_hcc) (HCC_64BYTE_CONTEXT(_hcc) ? 64 : 32) |
357 | ||
326b4810 | 358 | static struct xhci_container_ctx *xhci_alloc_container_ctx(struct xhci_hcd *xhci, |
d115b048 JY |
359 | int type, gfp_t flags) |
360 | { | |
29f9d54b SS |
361 | struct xhci_container_ctx *ctx; |
362 | ||
363 | if ((type != XHCI_CTX_TYPE_DEVICE) && (type != XHCI_CTX_TYPE_INPUT)) | |
364 | return NULL; | |
365 | ||
366 | ctx = kzalloc(sizeof(*ctx), flags); | |
d115b048 JY |
367 | if (!ctx) |
368 | return NULL; | |
369 | ||
d115b048 JY |
370 | ctx->type = type; |
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); | |
374 | ||
375 | ctx->bytes = dma_pool_alloc(xhci->device_pool, flags, &ctx->dma); | |
376 | memset(ctx->bytes, 0, ctx->size); | |
377 | return ctx; | |
378 | } | |
379 | ||
326b4810 | 380 | static void xhci_free_container_ctx(struct xhci_hcd *xhci, |
d115b048 JY |
381 | struct xhci_container_ctx *ctx) |
382 | { | |
a1d78c16 SS |
383 | if (!ctx) |
384 | return; | |
d115b048 JY |
385 | dma_pool_free(xhci->device_pool, ctx->bytes, ctx->dma); |
386 | kfree(ctx); | |
387 | } | |
388 | ||
389 | struct xhci_input_control_ctx *xhci_get_input_control_ctx(struct xhci_hcd *xhci, | |
390 | struct xhci_container_ctx *ctx) | |
391 | { | |
92f8e767 SS |
392 | if (ctx->type != XHCI_CTX_TYPE_INPUT) |
393 | return NULL; | |
394 | ||
d115b048 JY |
395 | return (struct xhci_input_control_ctx *)ctx->bytes; |
396 | } | |
397 | ||
398 | struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_hcd *xhci, | |
399 | struct xhci_container_ctx *ctx) | |
400 | { | |
401 | if (ctx->type == XHCI_CTX_TYPE_DEVICE) | |
402 | return (struct xhci_slot_ctx *)ctx->bytes; | |
403 | ||
404 | return (struct xhci_slot_ctx *) | |
405 | (ctx->bytes + CTX_SIZE(xhci->hcc_params)); | |
406 | } | |
407 | ||
408 | struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_hcd *xhci, | |
409 | struct xhci_container_ctx *ctx, | |
410 | unsigned int ep_index) | |
411 | { | |
412 | /* increment ep index by offset of start of ep ctx array */ | |
413 | ep_index++; | |
414 | if (ctx->type == XHCI_CTX_TYPE_INPUT) | |
415 | ep_index++; | |
416 | ||
417 | return (struct xhci_ep_ctx *) | |
418 | (ctx->bytes + (ep_index * CTX_SIZE(xhci->hcc_params))); | |
419 | } | |
420 | ||
8df75f42 SS |
421 | |
422 | /***************** Streams structures manipulation *************************/ | |
423 | ||
8212a49d | 424 | static void xhci_free_stream_ctx(struct xhci_hcd *xhci, |
8df75f42 SS |
425 | unsigned int num_stream_ctxs, |
426 | struct xhci_stream_ctx *stream_ctx, dma_addr_t dma) | |
427 | { | |
428 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); | |
429 | ||
430 | if (num_stream_ctxs > MEDIUM_STREAM_ARRAY_SIZE) | |
22d45f01 | 431 | dma_free_coherent(&pdev->dev, |
8df75f42 SS |
432 | sizeof(struct xhci_stream_ctx)*num_stream_ctxs, |
433 | stream_ctx, dma); | |
434 | else if (num_stream_ctxs <= SMALL_STREAM_ARRAY_SIZE) | |
435 | return dma_pool_free(xhci->small_streams_pool, | |
436 | stream_ctx, dma); | |
437 | else | |
438 | return dma_pool_free(xhci->medium_streams_pool, | |
439 | stream_ctx, dma); | |
440 | } | |
441 | ||
442 | /* | |
443 | * The stream context array for each endpoint with bulk streams enabled can | |
444 | * vary in size, based on: | |
445 | * - how many streams the endpoint supports, | |
446 | * - the maximum primary stream array size the host controller supports, | |
447 | * - and how many streams the device driver asks for. | |
448 | * | |
449 | * The stream context array must be a power of 2, and can be as small as | |
450 | * 64 bytes or as large as 1MB. | |
451 | */ | |
8212a49d | 452 | static struct xhci_stream_ctx *xhci_alloc_stream_ctx(struct xhci_hcd *xhci, |
8df75f42 SS |
453 | unsigned int num_stream_ctxs, dma_addr_t *dma, |
454 | gfp_t mem_flags) | |
455 | { | |
456 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); | |
457 | ||
458 | if (num_stream_ctxs > MEDIUM_STREAM_ARRAY_SIZE) | |
22d45f01 | 459 | return dma_alloc_coherent(&pdev->dev, |
8df75f42 | 460 | sizeof(struct xhci_stream_ctx)*num_stream_ctxs, |
22d45f01 | 461 | dma, mem_flags); |
8df75f42 SS |
462 | else if (num_stream_ctxs <= SMALL_STREAM_ARRAY_SIZE) |
463 | return dma_pool_alloc(xhci->small_streams_pool, | |
464 | mem_flags, dma); | |
465 | else | |
466 | return dma_pool_alloc(xhci->medium_streams_pool, | |
467 | mem_flags, dma); | |
468 | } | |
469 | ||
e9df17eb SS |
470 | struct xhci_ring *xhci_dma_to_transfer_ring( |
471 | struct xhci_virt_ep *ep, | |
472 | u64 address) | |
473 | { | |
474 | if (ep->ep_state & EP_HAS_STREAMS) | |
475 | return radix_tree_lookup(&ep->stream_info->trb_address_map, | |
eb8ccd2b | 476 | address >> TRB_SEGMENT_SHIFT); |
e9df17eb SS |
477 | return ep->ring; |
478 | } | |
479 | ||
480 | /* Only use this when you know stream_info is valid */ | |
8df75f42 | 481 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
e9df17eb | 482 | static struct xhci_ring *dma_to_stream_ring( |
8df75f42 SS |
483 | struct xhci_stream_info *stream_info, |
484 | u64 address) | |
485 | { | |
486 | return radix_tree_lookup(&stream_info->trb_address_map, | |
eb8ccd2b | 487 | address >> TRB_SEGMENT_SHIFT); |
8df75f42 SS |
488 | } |
489 | #endif /* CONFIG_USB_XHCI_HCD_DEBUGGING */ | |
490 | ||
e9df17eb SS |
491 | struct xhci_ring *xhci_stream_id_to_ring( |
492 | struct xhci_virt_device *dev, | |
493 | unsigned int ep_index, | |
494 | unsigned int stream_id) | |
495 | { | |
496 | struct xhci_virt_ep *ep = &dev->eps[ep_index]; | |
497 | ||
498 | if (stream_id == 0) | |
499 | return ep->ring; | |
500 | if (!ep->stream_info) | |
501 | return NULL; | |
502 | ||
503 | if (stream_id > ep->stream_info->num_streams) | |
504 | return NULL; | |
505 | return ep->stream_info->stream_rings[stream_id]; | |
506 | } | |
507 | ||
8df75f42 SS |
508 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
509 | static int xhci_test_radix_tree(struct xhci_hcd *xhci, | |
510 | unsigned int num_streams, | |
511 | struct xhci_stream_info *stream_info) | |
512 | { | |
513 | u32 cur_stream; | |
514 | struct xhci_ring *cur_ring; | |
515 | u64 addr; | |
516 | ||
517 | for (cur_stream = 1; cur_stream < num_streams; cur_stream++) { | |
518 | struct xhci_ring *mapped_ring; | |
519 | int trb_size = sizeof(union xhci_trb); | |
520 | ||
521 | cur_ring = stream_info->stream_rings[cur_stream]; | |
522 | for (addr = cur_ring->first_seg->dma; | |
eb8ccd2b | 523 | addr < cur_ring->first_seg->dma + TRB_SEGMENT_SIZE; |
8df75f42 SS |
524 | addr += trb_size) { |
525 | mapped_ring = dma_to_stream_ring(stream_info, addr); | |
526 | if (cur_ring != mapped_ring) { | |
527 | xhci_warn(xhci, "WARN: DMA address 0x%08llx " | |
528 | "didn't map to stream ID %u; " | |
529 | "mapped to ring %p\n", | |
530 | (unsigned long long) addr, | |
531 | cur_stream, | |
532 | mapped_ring); | |
533 | return -EINVAL; | |
534 | } | |
535 | } | |
536 | /* One TRB after the end of the ring segment shouldn't return a | |
537 | * pointer to the current ring (although it may be a part of a | |
538 | * different ring). | |
539 | */ | |
540 | mapped_ring = dma_to_stream_ring(stream_info, addr); | |
541 | if (mapped_ring != cur_ring) { | |
542 | /* One TRB before should also fail */ | |
543 | addr = cur_ring->first_seg->dma - trb_size; | |
544 | mapped_ring = dma_to_stream_ring(stream_info, addr); | |
545 | } | |
546 | if (mapped_ring == cur_ring) { | |
547 | xhci_warn(xhci, "WARN: Bad DMA address 0x%08llx " | |
548 | "mapped to valid stream ID %u; " | |
549 | "mapped ring = %p\n", | |
550 | (unsigned long long) addr, | |
551 | cur_stream, | |
552 | mapped_ring); | |
553 | return -EINVAL; | |
554 | } | |
555 | } | |
556 | return 0; | |
557 | } | |
558 | #endif /* CONFIG_USB_XHCI_HCD_DEBUGGING */ | |
559 | ||
560 | /* | |
561 | * Change an endpoint's internal structure so it supports stream IDs. The | |
562 | * number of requested streams includes stream 0, which cannot be used by device | |
563 | * drivers. | |
564 | * | |
565 | * The number of stream contexts in the stream context array may be bigger than | |
566 | * the number of streams the driver wants to use. This is because the number of | |
567 | * stream context array entries must be a power of two. | |
568 | * | |
569 | * We need a radix tree for mapping physical addresses of TRBs to which stream | |
570 | * ID they belong to. We need to do this because the host controller won't tell | |
571 | * us which stream ring the TRB came from. We could store the stream ID in an | |
572 | * event data TRB, but that doesn't help us for the cancellation case, since the | |
573 | * endpoint may stop before it reaches that event data TRB. | |
574 | * | |
575 | * The radix tree maps the upper portion of the TRB DMA address to a ring | |
576 | * segment that has the same upper portion of DMA addresses. For example, say I | |
577 | * have segments of size 1KB, that are always 64-byte aligned. A segment may | |
578 | * start at 0x10c91000 and end at 0x10c913f0. If I use the upper 10 bits, the | |
579 | * key to the stream ID is 0x43244. I can use the DMA address of the TRB to | |
580 | * pass the radix tree a key to get the right stream ID: | |
581 | * | |
582 | * 0x10c90fff >> 10 = 0x43243 | |
583 | * 0x10c912c0 >> 10 = 0x43244 | |
584 | * 0x10c91400 >> 10 = 0x43245 | |
585 | * | |
586 | * Obviously, only those TRBs with DMA addresses that are within the segment | |
587 | * will make the radix tree return the stream ID for that ring. | |
588 | * | |
589 | * Caveats for the radix tree: | |
590 | * | |
591 | * The radix tree uses an unsigned long as a key pair. On 32-bit systems, an | |
592 | * unsigned long will be 32-bits; on a 64-bit system an unsigned long will be | |
593 | * 64-bits. Since we only request 32-bit DMA addresses, we can use that as the | |
594 | * key on 32-bit or 64-bit systems (it would also be fine if we asked for 64-bit | |
595 | * PCI DMA addresses on a 64-bit system). There might be a problem on 32-bit | |
596 | * extended systems (where the DMA address can be bigger than 32-bits), | |
597 | * if we allow the PCI dma mask to be bigger than 32-bits. So don't do that. | |
598 | */ | |
599 | struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci, | |
600 | unsigned int num_stream_ctxs, | |
601 | unsigned int num_streams, gfp_t mem_flags) | |
602 | { | |
603 | struct xhci_stream_info *stream_info; | |
604 | u32 cur_stream; | |
605 | struct xhci_ring *cur_ring; | |
606 | unsigned long key; | |
607 | u64 addr; | |
608 | int ret; | |
609 | ||
610 | xhci_dbg(xhci, "Allocating %u streams and %u " | |
611 | "stream context array entries.\n", | |
612 | num_streams, num_stream_ctxs); | |
613 | if (xhci->cmd_ring_reserved_trbs == MAX_RSVD_CMD_TRBS) { | |
614 | xhci_dbg(xhci, "Command ring has no reserved TRBs available\n"); | |
615 | return NULL; | |
616 | } | |
617 | xhci->cmd_ring_reserved_trbs++; | |
618 | ||
619 | stream_info = kzalloc(sizeof(struct xhci_stream_info), mem_flags); | |
620 | if (!stream_info) | |
621 | goto cleanup_trbs; | |
622 | ||
623 | stream_info->num_streams = num_streams; | |
624 | stream_info->num_stream_ctxs = num_stream_ctxs; | |
625 | ||
626 | /* Initialize the array of virtual pointers to stream rings. */ | |
627 | stream_info->stream_rings = kzalloc( | |
628 | sizeof(struct xhci_ring *)*num_streams, | |
629 | mem_flags); | |
630 | if (!stream_info->stream_rings) | |
631 | goto cleanup_info; | |
632 | ||
633 | /* Initialize the array of DMA addresses for stream rings for the HW. */ | |
634 | stream_info->stream_ctx_array = xhci_alloc_stream_ctx(xhci, | |
635 | num_stream_ctxs, &stream_info->ctx_array_dma, | |
636 | mem_flags); | |
637 | if (!stream_info->stream_ctx_array) | |
638 | goto cleanup_ctx; | |
639 | memset(stream_info->stream_ctx_array, 0, | |
640 | sizeof(struct xhci_stream_ctx)*num_stream_ctxs); | |
641 | ||
642 | /* Allocate everything needed to free the stream rings later */ | |
643 | stream_info->free_streams_command = | |
644 | xhci_alloc_command(xhci, true, true, mem_flags); | |
645 | if (!stream_info->free_streams_command) | |
646 | goto cleanup_ctx; | |
647 | ||
648 | INIT_RADIX_TREE(&stream_info->trb_address_map, GFP_ATOMIC); | |
649 | ||
650 | /* Allocate rings for all the streams that the driver will use, | |
651 | * and add their segment DMA addresses to the radix tree. | |
652 | * Stream 0 is reserved. | |
653 | */ | |
654 | for (cur_stream = 1; cur_stream < num_streams; cur_stream++) { | |
655 | stream_info->stream_rings[cur_stream] = | |
2fdcd47b | 656 | xhci_ring_alloc(xhci, 2, 1, TYPE_STREAM, mem_flags); |
8df75f42 SS |
657 | cur_ring = stream_info->stream_rings[cur_stream]; |
658 | if (!cur_ring) | |
659 | goto cleanup_rings; | |
e9df17eb | 660 | cur_ring->stream_id = cur_stream; |
8df75f42 SS |
661 | /* Set deq ptr, cycle bit, and stream context type */ |
662 | addr = cur_ring->first_seg->dma | | |
663 | SCT_FOR_CTX(SCT_PRI_TR) | | |
664 | cur_ring->cycle_state; | |
f5960b69 ME |
665 | stream_info->stream_ctx_array[cur_stream].stream_ring = |
666 | cpu_to_le64(addr); | |
8df75f42 SS |
667 | xhci_dbg(xhci, "Setting stream %d ring ptr to 0x%08llx\n", |
668 | cur_stream, (unsigned long long) addr); | |
669 | ||
670 | key = (unsigned long) | |
eb8ccd2b | 671 | (cur_ring->first_seg->dma >> TRB_SEGMENT_SHIFT); |
8df75f42 SS |
672 | ret = radix_tree_insert(&stream_info->trb_address_map, |
673 | key, cur_ring); | |
674 | if (ret) { | |
675 | xhci_ring_free(xhci, cur_ring); | |
676 | stream_info->stream_rings[cur_stream] = NULL; | |
677 | goto cleanup_rings; | |
678 | } | |
679 | } | |
680 | /* Leave the other unused stream ring pointers in the stream context | |
681 | * array initialized to zero. This will cause the xHC to give us an | |
682 | * error if the device asks for a stream ID we don't have setup (if it | |
683 | * was any other way, the host controller would assume the ring is | |
684 | * "empty" and wait forever for data to be queued to that stream ID). | |
685 | */ | |
686 | #if XHCI_DEBUG | |
687 | /* Do a little test on the radix tree to make sure it returns the | |
688 | * correct values. | |
689 | */ | |
690 | if (xhci_test_radix_tree(xhci, num_streams, stream_info)) | |
691 | goto cleanup_rings; | |
692 | #endif | |
693 | ||
694 | return stream_info; | |
695 | ||
696 | cleanup_rings: | |
697 | for (cur_stream = 1; cur_stream < num_streams; cur_stream++) { | |
698 | cur_ring = stream_info->stream_rings[cur_stream]; | |
699 | if (cur_ring) { | |
700 | addr = cur_ring->first_seg->dma; | |
701 | radix_tree_delete(&stream_info->trb_address_map, | |
eb8ccd2b | 702 | addr >> TRB_SEGMENT_SHIFT); |
8df75f42 SS |
703 | xhci_ring_free(xhci, cur_ring); |
704 | stream_info->stream_rings[cur_stream] = NULL; | |
705 | } | |
706 | } | |
707 | xhci_free_command(xhci, stream_info->free_streams_command); | |
708 | cleanup_ctx: | |
709 | kfree(stream_info->stream_rings); | |
710 | cleanup_info: | |
711 | kfree(stream_info); | |
712 | cleanup_trbs: | |
713 | xhci->cmd_ring_reserved_trbs--; | |
714 | return NULL; | |
715 | } | |
716 | /* | |
717 | * Sets the MaxPStreams field and the Linear Stream Array field. | |
718 | * Sets the dequeue pointer to the stream context array. | |
719 | */ | |
720 | void xhci_setup_streams_ep_input_ctx(struct xhci_hcd *xhci, | |
721 | struct xhci_ep_ctx *ep_ctx, | |
722 | struct xhci_stream_info *stream_info) | |
723 | { | |
724 | u32 max_primary_streams; | |
725 | /* MaxPStreams is the number of stream context array entries, not the | |
726 | * number we're actually using. Must be in 2^(MaxPstreams + 1) format. | |
727 | * fls(0) = 0, fls(0x1) = 1, fls(0x10) = 2, fls(0x100) = 3, etc. | |
728 | */ | |
729 | max_primary_streams = fls(stream_info->num_stream_ctxs) - 2; | |
730 | xhci_dbg(xhci, "Setting number of stream ctx array entries to %u\n", | |
731 | 1 << (max_primary_streams + 1)); | |
28ccd296 ME |
732 | ep_ctx->ep_info &= cpu_to_le32(~EP_MAXPSTREAMS_MASK); |
733 | ep_ctx->ep_info |= cpu_to_le32(EP_MAXPSTREAMS(max_primary_streams) | |
734 | | EP_HAS_LSA); | |
735 | ep_ctx->deq = cpu_to_le64(stream_info->ctx_array_dma); | |
8df75f42 SS |
736 | } |
737 | ||
738 | /* | |
739 | * Sets the MaxPStreams field and the Linear Stream Array field to 0. | |
740 | * Reinstalls the "normal" endpoint ring (at its previous dequeue mark, | |
741 | * not at the beginning of the ring). | |
742 | */ | |
743 | void xhci_setup_no_streams_ep_input_ctx(struct xhci_hcd *xhci, | |
744 | struct xhci_ep_ctx *ep_ctx, | |
745 | struct xhci_virt_ep *ep) | |
746 | { | |
747 | dma_addr_t addr; | |
28ccd296 | 748 | ep_ctx->ep_info &= cpu_to_le32(~(EP_MAXPSTREAMS_MASK | EP_HAS_LSA)); |
8df75f42 | 749 | addr = xhci_trb_virt_to_dma(ep->ring->deq_seg, ep->ring->dequeue); |
28ccd296 | 750 | ep_ctx->deq = cpu_to_le64(addr | ep->ring->cycle_state); |
8df75f42 SS |
751 | } |
752 | ||
753 | /* Frees all stream contexts associated with the endpoint, | |
754 | * | |
755 | * Caller should fix the endpoint context streams fields. | |
756 | */ | |
757 | void xhci_free_stream_info(struct xhci_hcd *xhci, | |
758 | struct xhci_stream_info *stream_info) | |
759 | { | |
760 | int cur_stream; | |
761 | struct xhci_ring *cur_ring; | |
762 | dma_addr_t addr; | |
763 | ||
764 | if (!stream_info) | |
765 | return; | |
766 | ||
767 | for (cur_stream = 1; cur_stream < stream_info->num_streams; | |
768 | cur_stream++) { | |
769 | cur_ring = stream_info->stream_rings[cur_stream]; | |
770 | if (cur_ring) { | |
771 | addr = cur_ring->first_seg->dma; | |
772 | radix_tree_delete(&stream_info->trb_address_map, | |
eb8ccd2b | 773 | addr >> TRB_SEGMENT_SHIFT); |
8df75f42 SS |
774 | xhci_ring_free(xhci, cur_ring); |
775 | stream_info->stream_rings[cur_stream] = NULL; | |
776 | } | |
777 | } | |
778 | xhci_free_command(xhci, stream_info->free_streams_command); | |
779 | xhci->cmd_ring_reserved_trbs--; | |
780 | if (stream_info->stream_ctx_array) | |
781 | xhci_free_stream_ctx(xhci, | |
782 | stream_info->num_stream_ctxs, | |
783 | stream_info->stream_ctx_array, | |
784 | stream_info->ctx_array_dma); | |
785 | ||
786 | if (stream_info) | |
787 | kfree(stream_info->stream_rings); | |
788 | kfree(stream_info); | |
789 | } | |
790 | ||
791 | ||
792 | /***************** Device context manipulation *************************/ | |
793 | ||
6f5165cf SS |
794 | static void xhci_init_endpoint_timer(struct xhci_hcd *xhci, |
795 | struct xhci_virt_ep *ep) | |
796 | { | |
797 | init_timer(&ep->stop_cmd_timer); | |
798 | ep->stop_cmd_timer.data = (unsigned long) ep; | |
799 | ep->stop_cmd_timer.function = xhci_stop_endpoint_command_watchdog; | |
800 | ep->xhci = xhci; | |
801 | } | |
802 | ||
839c817c SS |
803 | static void xhci_free_tt_info(struct xhci_hcd *xhci, |
804 | struct xhci_virt_device *virt_dev, | |
805 | int slot_id) | |
806 | { | |
839c817c | 807 | struct list_head *tt_list_head; |
46ed8f00 TI |
808 | struct xhci_tt_bw_info *tt_info, *next; |
809 | bool slot_found = false; | |
839c817c SS |
810 | |
811 | /* If the device never made it past the Set Address stage, | |
812 | * it may not have the real_port set correctly. | |
813 | */ | |
814 | if (virt_dev->real_port == 0 || | |
815 | virt_dev->real_port > HCS_MAX_PORTS(xhci->hcs_params1)) { | |
816 | xhci_dbg(xhci, "Bad real port.\n"); | |
817 | return; | |
818 | } | |
819 | ||
820 | tt_list_head = &(xhci->rh_bw[virt_dev->real_port - 1].tts); | |
46ed8f00 TI |
821 | list_for_each_entry_safe(tt_info, next, tt_list_head, tt_list) { |
822 | /* Multi-TT hubs will have more than one entry */ | |
823 | if (tt_info->slot_id == slot_id) { | |
824 | slot_found = true; | |
825 | list_del(&tt_info->tt_list); | |
826 | kfree(tt_info); | |
827 | } else if (slot_found) { | |
839c817c | 828 | break; |
46ed8f00 | 829 | } |
839c817c | 830 | } |
839c817c SS |
831 | } |
832 | ||
833 | int xhci_alloc_tt_info(struct xhci_hcd *xhci, | |
834 | struct xhci_virt_device *virt_dev, | |
835 | struct usb_device *hdev, | |
836 | struct usb_tt *tt, gfp_t mem_flags) | |
837 | { | |
838 | struct xhci_tt_bw_info *tt_info; | |
839 | unsigned int num_ports; | |
840 | int i, j; | |
841 | ||
842 | if (!tt->multi) | |
843 | num_ports = 1; | |
844 | else | |
845 | num_ports = hdev->maxchild; | |
846 | ||
847 | for (i = 0; i < num_ports; i++, tt_info++) { | |
848 | struct xhci_interval_bw_table *bw_table; | |
849 | ||
850 | tt_info = kzalloc(sizeof(*tt_info), mem_flags); | |
851 | if (!tt_info) | |
852 | goto free_tts; | |
853 | INIT_LIST_HEAD(&tt_info->tt_list); | |
854 | list_add(&tt_info->tt_list, | |
855 | &xhci->rh_bw[virt_dev->real_port - 1].tts); | |
856 | tt_info->slot_id = virt_dev->udev->slot_id; | |
857 | if (tt->multi) | |
858 | tt_info->ttport = i+1; | |
859 | bw_table = &tt_info->bw_table; | |
860 | for (j = 0; j < XHCI_MAX_INTERVAL; j++) | |
861 | INIT_LIST_HEAD(&bw_table->interval_bw[j].endpoints); | |
862 | } | |
863 | return 0; | |
864 | ||
865 | free_tts: | |
866 | xhci_free_tt_info(xhci, virt_dev, virt_dev->udev->slot_id); | |
867 | return -ENOMEM; | |
868 | } | |
869 | ||
870 | ||
871 | /* All the xhci_tds in the ring's TD list should be freed at this point. | |
872 | * Should be called with xhci->lock held if there is any chance the TT lists | |
873 | * will be manipulated by the configure endpoint, allocate device, or update | |
874 | * hub functions while this function is removing the TT entries from the list. | |
875 | */ | |
3ffbba95 SS |
876 | void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id) |
877 | { | |
878 | struct xhci_virt_device *dev; | |
879 | int i; | |
2e27980e | 880 | int old_active_eps = 0; |
3ffbba95 SS |
881 | |
882 | /* Slot ID 0 is reserved */ | |
883 | if (slot_id == 0 || !xhci->devs[slot_id]) | |
884 | return; | |
885 | ||
886 | dev = xhci->devs[slot_id]; | |
8e595a5d | 887 | xhci->dcbaa->dev_context_ptrs[slot_id] = 0; |
3ffbba95 SS |
888 | if (!dev) |
889 | return; | |
890 | ||
2e27980e SS |
891 | if (dev->tt_info) |
892 | old_active_eps = dev->tt_info->active_eps; | |
893 | ||
8df75f42 | 894 | for (i = 0; i < 31; ++i) { |
63a0d9ab SS |
895 | if (dev->eps[i].ring) |
896 | xhci_ring_free(xhci, dev->eps[i].ring); | |
8df75f42 SS |
897 | if (dev->eps[i].stream_info) |
898 | xhci_free_stream_info(xhci, | |
899 | dev->eps[i].stream_info); | |
2e27980e SS |
900 | /* Endpoints on the TT/root port lists should have been removed |
901 | * when usb_disable_device() was called for the device. | |
902 | * We can't drop them anyway, because the udev might have gone | |
903 | * away by this point, and we can't tell what speed it was. | |
904 | */ | |
905 | if (!list_empty(&dev->eps[i].bw_endpoint_list)) | |
906 | xhci_warn(xhci, "Slot %u endpoint %u " | |
907 | "not removed from BW list!\n", | |
908 | slot_id, i); | |
8df75f42 | 909 | } |
839c817c SS |
910 | /* If this is a hub, free the TT(s) from the TT list */ |
911 | xhci_free_tt_info(xhci, dev, slot_id); | |
2e27980e SS |
912 | /* If necessary, update the number of active TTs on this root port */ |
913 | xhci_update_tt_active_eps(xhci, dev, old_active_eps); | |
3ffbba95 | 914 | |
74f9fe21 SS |
915 | if (dev->ring_cache) { |
916 | for (i = 0; i < dev->num_rings_cached; i++) | |
917 | xhci_ring_free(xhci, dev->ring_cache[i]); | |
918 | kfree(dev->ring_cache); | |
919 | } | |
920 | ||
3ffbba95 | 921 | if (dev->in_ctx) |
d115b048 | 922 | xhci_free_container_ctx(xhci, dev->in_ctx); |
3ffbba95 | 923 | if (dev->out_ctx) |
d115b048 JY |
924 | xhci_free_container_ctx(xhci, dev->out_ctx); |
925 | ||
3ffbba95 | 926 | kfree(xhci->devs[slot_id]); |
326b4810 | 927 | xhci->devs[slot_id] = NULL; |
3ffbba95 SS |
928 | } |
929 | ||
930 | int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id, | |
931 | struct usb_device *udev, gfp_t flags) | |
932 | { | |
3ffbba95 | 933 | struct xhci_virt_device *dev; |
63a0d9ab | 934 | int i; |
3ffbba95 SS |
935 | |
936 | /* Slot ID 0 is reserved */ | |
937 | if (slot_id == 0 || xhci->devs[slot_id]) { | |
938 | xhci_warn(xhci, "Bad Slot ID %d\n", slot_id); | |
939 | return 0; | |
940 | } | |
941 | ||
942 | xhci->devs[slot_id] = kzalloc(sizeof(*xhci->devs[slot_id]), flags); | |
943 | if (!xhci->devs[slot_id]) | |
944 | return 0; | |
945 | dev = xhci->devs[slot_id]; | |
946 | ||
d115b048 JY |
947 | /* Allocate the (output) device context that will be used in the HC. */ |
948 | dev->out_ctx = xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_DEVICE, flags); | |
3ffbba95 SS |
949 | if (!dev->out_ctx) |
950 | goto fail; | |
d115b048 | 951 | |
700e2052 | 952 | xhci_dbg(xhci, "Slot %d output ctx = 0x%llx (dma)\n", slot_id, |
d115b048 | 953 | (unsigned long long)dev->out_ctx->dma); |
3ffbba95 SS |
954 | |
955 | /* Allocate the (input) device context for address device command */ | |
d115b048 | 956 | dev->in_ctx = xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_INPUT, flags); |
3ffbba95 SS |
957 | if (!dev->in_ctx) |
958 | goto fail; | |
d115b048 | 959 | |
700e2052 | 960 | xhci_dbg(xhci, "Slot %d input ctx = 0x%llx (dma)\n", slot_id, |
d115b048 | 961 | (unsigned long long)dev->in_ctx->dma); |
3ffbba95 | 962 | |
6f5165cf SS |
963 | /* Initialize the cancellation list and watchdog timers for each ep */ |
964 | for (i = 0; i < 31; i++) { | |
965 | xhci_init_endpoint_timer(xhci, &dev->eps[i]); | |
63a0d9ab | 966 | INIT_LIST_HEAD(&dev->eps[i].cancelled_td_list); |
2e27980e | 967 | INIT_LIST_HEAD(&dev->eps[i].bw_endpoint_list); |
6f5165cf | 968 | } |
63a0d9ab | 969 | |
3ffbba95 | 970 | /* Allocate endpoint 0 ring */ |
2fdcd47b | 971 | dev->eps[0].ring = xhci_ring_alloc(xhci, 2, 1, TYPE_CTRL, flags); |
63a0d9ab | 972 | if (!dev->eps[0].ring) |
3ffbba95 SS |
973 | goto fail; |
974 | ||
74f9fe21 SS |
975 | /* Allocate pointers to the ring cache */ |
976 | dev->ring_cache = kzalloc( | |
977 | sizeof(struct xhci_ring *)*XHCI_MAX_RINGS_CACHED, | |
978 | flags); | |
979 | if (!dev->ring_cache) | |
980 | goto fail; | |
981 | dev->num_rings_cached = 0; | |
982 | ||
f94e0186 | 983 | init_completion(&dev->cmd_completion); |
913a8a34 | 984 | INIT_LIST_HEAD(&dev->cmd_list); |
64927730 | 985 | dev->udev = udev; |
f94e0186 | 986 | |
28c2d2ef | 987 | /* Point to output device context in dcbaa. */ |
28ccd296 | 988 | xhci->dcbaa->dev_context_ptrs[slot_id] = cpu_to_le64(dev->out_ctx->dma); |
700e2052 | 989 | xhci_dbg(xhci, "Set slot id %d dcbaa entry %p to 0x%llx\n", |
28ccd296 ME |
990 | slot_id, |
991 | &xhci->dcbaa->dev_context_ptrs[slot_id], | |
f5960b69 | 992 | le64_to_cpu(xhci->dcbaa->dev_context_ptrs[slot_id])); |
3ffbba95 SS |
993 | |
994 | return 1; | |
995 | fail: | |
996 | xhci_free_virt_device(xhci, slot_id); | |
997 | return 0; | |
998 | } | |
999 | ||
2d1ee590 SS |
1000 | void xhci_copy_ep0_dequeue_into_input_ctx(struct xhci_hcd *xhci, |
1001 | struct usb_device *udev) | |
1002 | { | |
1003 | struct xhci_virt_device *virt_dev; | |
1004 | struct xhci_ep_ctx *ep0_ctx; | |
1005 | struct xhci_ring *ep_ring; | |
1006 | ||
1007 | virt_dev = xhci->devs[udev->slot_id]; | |
1008 | ep0_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, 0); | |
1009 | ep_ring = virt_dev->eps[0].ring; | |
1010 | /* | |
1011 | * FIXME we don't keep track of the dequeue pointer very well after a | |
1012 | * Set TR dequeue pointer, so we're setting the dequeue pointer of the | |
1013 | * host to our enqueue pointer. This should only be called after a | |
1014 | * configured device has reset, so all control transfers should have | |
1015 | * been completed or cancelled before the reset. | |
1016 | */ | |
28ccd296 ME |
1017 | ep0_ctx->deq = cpu_to_le64(xhci_trb_virt_to_dma(ep_ring->enq_seg, |
1018 | ep_ring->enqueue) | |
1019 | | ep_ring->cycle_state); | |
2d1ee590 SS |
1020 | } |
1021 | ||
f6ff0ac8 SS |
1022 | /* |
1023 | * The xHCI roothub may have ports of differing speeds in any order in the port | |
1024 | * status registers. xhci->port_array provides an array of the port speed for | |
1025 | * each offset into the port status registers. | |
1026 | * | |
1027 | * The xHCI hardware wants to know the roothub port number that the USB device | |
1028 | * is attached to (or the roothub port its ancestor hub is attached to). All we | |
1029 | * know is the index of that port under either the USB 2.0 or the USB 3.0 | |
1030 | * roothub, but that doesn't give us the real index into the HW port status | |
3f5eb141 | 1031 | * registers. Call xhci_find_raw_port_number() to get real index. |
f6ff0ac8 SS |
1032 | */ |
1033 | static u32 xhci_find_real_port_number(struct xhci_hcd *xhci, | |
1034 | struct usb_device *udev) | |
1035 | { | |
1036 | struct usb_device *top_dev; | |
3f5eb141 LT |
1037 | struct usb_hcd *hcd; |
1038 | ||
1039 | if (udev->speed == USB_SPEED_SUPER) | |
1040 | hcd = xhci->shared_hcd; | |
1041 | else | |
1042 | hcd = xhci->main_hcd; | |
f6ff0ac8 SS |
1043 | |
1044 | for (top_dev = udev; top_dev->parent && top_dev->parent->parent; | |
1045 | top_dev = top_dev->parent) | |
1046 | /* Found device below root hub */; | |
f6ff0ac8 | 1047 | |
3f5eb141 | 1048 | return xhci_find_raw_port_number(hcd, top_dev->portnum); |
f6ff0ac8 SS |
1049 | } |
1050 | ||
3ffbba95 SS |
1051 | /* Setup an xHCI virtual device for a Set Address command */ |
1052 | int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev) | |
1053 | { | |
1054 | struct xhci_virt_device *dev; | |
1055 | struct xhci_ep_ctx *ep0_ctx; | |
d115b048 | 1056 | struct xhci_slot_ctx *slot_ctx; |
f6ff0ac8 SS |
1057 | u32 port_num; |
1058 | struct usb_device *top_dev; | |
3ffbba95 SS |
1059 | |
1060 | dev = xhci->devs[udev->slot_id]; | |
1061 | /* Slot ID 0 is reserved */ | |
1062 | if (udev->slot_id == 0 || !dev) { | |
1063 | xhci_warn(xhci, "Slot ID %d is not assigned to this device\n", | |
1064 | udev->slot_id); | |
1065 | return -EINVAL; | |
1066 | } | |
d115b048 | 1067 | ep0_ctx = xhci_get_ep_ctx(xhci, dev->in_ctx, 0); |
d115b048 | 1068 | slot_ctx = xhci_get_slot_ctx(xhci, dev->in_ctx); |
3ffbba95 | 1069 | |
3ffbba95 | 1070 | /* 3) Only the control endpoint is valid - one endpoint context */ |
f5960b69 | 1071 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1) | udev->route); |
3ffbba95 SS |
1072 | switch (udev->speed) { |
1073 | case USB_SPEED_SUPER: | |
f5960b69 | 1074 | slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_SS); |
3ffbba95 SS |
1075 | break; |
1076 | case USB_SPEED_HIGH: | |
f5960b69 | 1077 | slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_HS); |
3ffbba95 SS |
1078 | break; |
1079 | case USB_SPEED_FULL: | |
f5960b69 | 1080 | slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_FS); |
3ffbba95 SS |
1081 | break; |
1082 | case USB_SPEED_LOW: | |
f5960b69 | 1083 | slot_ctx->dev_info |= cpu_to_le32(SLOT_SPEED_LS); |
3ffbba95 | 1084 | break; |
551cdbbe | 1085 | case USB_SPEED_WIRELESS: |
3ffbba95 SS |
1086 | xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n"); |
1087 | return -EINVAL; | |
1088 | break; | |
1089 | default: | |
1090 | /* Speed was set earlier, this shouldn't happen. */ | |
1091 | BUG(); | |
1092 | } | |
1093 | /* Find the root hub port this device is under */ | |
f6ff0ac8 SS |
1094 | port_num = xhci_find_real_port_number(xhci, udev); |
1095 | if (!port_num) | |
1096 | return -EINVAL; | |
f5960b69 | 1097 | slot_ctx->dev_info2 |= cpu_to_le32(ROOT_HUB_PORT(port_num)); |
f6ff0ac8 | 1098 | /* Set the port number in the virtual_device to the faked port number */ |
3ffbba95 SS |
1099 | for (top_dev = udev; top_dev->parent && top_dev->parent->parent; |
1100 | top_dev = top_dev->parent) | |
1101 | /* Found device below root hub */; | |
fe30182c | 1102 | dev->fake_port = top_dev->portnum; |
66381755 | 1103 | dev->real_port = port_num; |
f6ff0ac8 | 1104 | xhci_dbg(xhci, "Set root hub portnum to %d\n", port_num); |
fe30182c | 1105 | xhci_dbg(xhci, "Set fake root hub portnum to %d\n", dev->fake_port); |
3ffbba95 | 1106 | |
839c817c SS |
1107 | /* Find the right bandwidth table that this device will be a part of. |
1108 | * If this is a full speed device attached directly to a root port (or a | |
1109 | * decendent of one), it counts as a primary bandwidth domain, not a | |
1110 | * secondary bandwidth domain under a TT. An xhci_tt_info structure | |
1111 | * will never be created for the HS root hub. | |
1112 | */ | |
1113 | if (!udev->tt || !udev->tt->hub->parent) { | |
1114 | dev->bw_table = &xhci->rh_bw[port_num - 1].bw_table; | |
1115 | } else { | |
1116 | struct xhci_root_port_bw_info *rh_bw; | |
1117 | struct xhci_tt_bw_info *tt_bw; | |
1118 | ||
1119 | rh_bw = &xhci->rh_bw[port_num - 1]; | |
1120 | /* Find the right TT. */ | |
1121 | list_for_each_entry(tt_bw, &rh_bw->tts, tt_list) { | |
1122 | if (tt_bw->slot_id != udev->tt->hub->slot_id) | |
1123 | continue; | |
1124 | ||
1125 | if (!dev->udev->tt->multi || | |
1126 | (udev->tt->multi && | |
1127 | tt_bw->ttport == dev->udev->ttport)) { | |
1128 | dev->bw_table = &tt_bw->bw_table; | |
1129 | dev->tt_info = tt_bw; | |
1130 | break; | |
1131 | } | |
1132 | } | |
1133 | if (!dev->tt_info) | |
1134 | xhci_warn(xhci, "WARN: Didn't find a matching TT\n"); | |
1135 | } | |
1136 | ||
aa1b13ef SS |
1137 | /* Is this a LS/FS device under an external HS hub? */ |
1138 | if (udev->tt && udev->tt->hub->parent) { | |
28ccd296 ME |
1139 | slot_ctx->tt_info = cpu_to_le32(udev->tt->hub->slot_id | |
1140 | (udev->ttport << 8)); | |
07b6de10 | 1141 | if (udev->tt->multi) |
28ccd296 | 1142 | slot_ctx->dev_info |= cpu_to_le32(DEV_MTT); |
3ffbba95 | 1143 | } |
700e2052 | 1144 | xhci_dbg(xhci, "udev->tt = %p\n", udev->tt); |
3ffbba95 SS |
1145 | xhci_dbg(xhci, "udev->ttport = 0x%x\n", udev->ttport); |
1146 | ||
1147 | /* Step 4 - ring already allocated */ | |
1148 | /* Step 5 */ | |
28ccd296 | 1149 | ep0_ctx->ep_info2 = cpu_to_le32(EP_TYPE(CTRL_EP)); |
3ffbba95 | 1150 | /* |
3ffbba95 SS |
1151 | * XXX: Not sure about wireless USB devices. |
1152 | */ | |
47aded8a SS |
1153 | switch (udev->speed) { |
1154 | case USB_SPEED_SUPER: | |
28ccd296 | 1155 | ep0_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(512)); |
47aded8a SS |
1156 | break; |
1157 | case USB_SPEED_HIGH: | |
1158 | /* USB core guesses at a 64-byte max packet first for FS devices */ | |
1159 | case USB_SPEED_FULL: | |
28ccd296 | 1160 | ep0_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(64)); |
47aded8a SS |
1161 | break; |
1162 | case USB_SPEED_LOW: | |
28ccd296 | 1163 | ep0_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(8)); |
47aded8a | 1164 | break; |
551cdbbe | 1165 | case USB_SPEED_WIRELESS: |
47aded8a SS |
1166 | xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n"); |
1167 | return -EINVAL; | |
1168 | break; | |
1169 | default: | |
1170 | /* New speed? */ | |
1171 | BUG(); | |
1172 | } | |
3ffbba95 | 1173 | /* EP 0 can handle "burst" sizes of 1, so Max Burst Size field is 0 */ |
28ccd296 | 1174 | ep0_ctx->ep_info2 |= cpu_to_le32(MAX_BURST(0) | ERROR_COUNT(3)); |
3ffbba95 | 1175 | |
28ccd296 ME |
1176 | ep0_ctx->deq = cpu_to_le64(dev->eps[0].ring->first_seg->dma | |
1177 | dev->eps[0].ring->cycle_state); | |
3ffbba95 SS |
1178 | |
1179 | /* Steps 7 and 8 were done in xhci_alloc_virt_device() */ | |
1180 | ||
1181 | return 0; | |
1182 | } | |
1183 | ||
dfa49c4a DT |
1184 | /* |
1185 | * Convert interval expressed as 2^(bInterval - 1) == interval into | |
1186 | * straight exponent value 2^n == interval. | |
1187 | * | |
1188 | */ | |
1189 | static unsigned int xhci_parse_exponent_interval(struct usb_device *udev, | |
1190 | struct usb_host_endpoint *ep) | |
1191 | { | |
1192 | unsigned int interval; | |
1193 | ||
1194 | interval = clamp_val(ep->desc.bInterval, 1, 16) - 1; | |
1195 | if (interval != ep->desc.bInterval - 1) | |
1196 | dev_warn(&udev->dev, | |
cd3c18ba | 1197 | "ep %#x - rounding interval to %d %sframes\n", |
dfa49c4a | 1198 | ep->desc.bEndpointAddress, |
cd3c18ba DT |
1199 | 1 << interval, |
1200 | udev->speed == USB_SPEED_FULL ? "" : "micro"); | |
1201 | ||
1202 | if (udev->speed == USB_SPEED_FULL) { | |
1203 | /* | |
1204 | * Full speed isoc endpoints specify interval in frames, | |
1205 | * not microframes. We are using microframes everywhere, | |
1206 | * so adjust accordingly. | |
1207 | */ | |
1208 | interval += 3; /* 1 frame = 2^3 uframes */ | |
1209 | } | |
dfa49c4a DT |
1210 | |
1211 | return interval; | |
1212 | } | |
1213 | ||
1214 | /* | |
340a3504 | 1215 | * Convert bInterval expressed in microframes (in 1-255 range) to exponent of |
dfa49c4a DT |
1216 | * microframes, rounded down to nearest power of 2. |
1217 | */ | |
340a3504 SS |
1218 | static unsigned int xhci_microframes_to_exponent(struct usb_device *udev, |
1219 | struct usb_host_endpoint *ep, unsigned int desc_interval, | |
1220 | unsigned int min_exponent, unsigned int max_exponent) | |
dfa49c4a DT |
1221 | { |
1222 | unsigned int interval; | |
1223 | ||
340a3504 SS |
1224 | interval = fls(desc_interval) - 1; |
1225 | interval = clamp_val(interval, min_exponent, max_exponent); | |
1226 | if ((1 << interval) != desc_interval) | |
dfa49c4a DT |
1227 | dev_warn(&udev->dev, |
1228 | "ep %#x - rounding interval to %d microframes, ep desc says %d microframes\n", | |
1229 | ep->desc.bEndpointAddress, | |
1230 | 1 << interval, | |
340a3504 | 1231 | desc_interval); |
dfa49c4a DT |
1232 | |
1233 | return interval; | |
1234 | } | |
1235 | ||
340a3504 SS |
1236 | static unsigned int xhci_parse_microframe_interval(struct usb_device *udev, |
1237 | struct usb_host_endpoint *ep) | |
1238 | { | |
55c1945e SS |
1239 | if (ep->desc.bInterval == 0) |
1240 | return 0; | |
340a3504 SS |
1241 | return xhci_microframes_to_exponent(udev, ep, |
1242 | ep->desc.bInterval, 0, 15); | |
1243 | } | |
1244 | ||
1245 | ||
1246 | static unsigned int xhci_parse_frame_interval(struct usb_device *udev, | |
1247 | struct usb_host_endpoint *ep) | |
1248 | { | |
1249 | return xhci_microframes_to_exponent(udev, ep, | |
1250 | ep->desc.bInterval * 8, 3, 10); | |
1251 | } | |
1252 | ||
f94e0186 SS |
1253 | /* Return the polling or NAK interval. |
1254 | * | |
1255 | * The polling interval is expressed in "microframes". If xHCI's Interval field | |
1256 | * is set to N, it will service the endpoint every 2^(Interval)*125us. | |
1257 | * | |
1258 | * The NAK interval is one NAK per 1 to 255 microframes, or no NAKs if interval | |
1259 | * is set to 0. | |
1260 | */ | |
575688e1 | 1261 | static unsigned int xhci_get_endpoint_interval(struct usb_device *udev, |
f94e0186 SS |
1262 | struct usb_host_endpoint *ep) |
1263 | { | |
1264 | unsigned int interval = 0; | |
1265 | ||
1266 | switch (udev->speed) { | |
1267 | case USB_SPEED_HIGH: | |
1268 | /* Max NAK rate */ | |
1269 | if (usb_endpoint_xfer_control(&ep->desc) || | |
dfa49c4a | 1270 | usb_endpoint_xfer_bulk(&ep->desc)) { |
340a3504 | 1271 | interval = xhci_parse_microframe_interval(udev, ep); |
dfa49c4a DT |
1272 | break; |
1273 | } | |
f94e0186 | 1274 | /* Fall through - SS and HS isoc/int have same decoding */ |
dfa49c4a | 1275 | |
f94e0186 SS |
1276 | case USB_SPEED_SUPER: |
1277 | if (usb_endpoint_xfer_int(&ep->desc) || | |
dfa49c4a DT |
1278 | usb_endpoint_xfer_isoc(&ep->desc)) { |
1279 | interval = xhci_parse_exponent_interval(udev, ep); | |
f94e0186 SS |
1280 | } |
1281 | break; | |
dfa49c4a | 1282 | |
f94e0186 | 1283 | case USB_SPEED_FULL: |
b513d447 | 1284 | if (usb_endpoint_xfer_isoc(&ep->desc)) { |
dfa49c4a DT |
1285 | interval = xhci_parse_exponent_interval(udev, ep); |
1286 | break; | |
1287 | } | |
1288 | /* | |
b513d447 | 1289 | * Fall through for interrupt endpoint interval decoding |
dfa49c4a DT |
1290 | * since it uses the same rules as low speed interrupt |
1291 | * endpoints. | |
1292 | */ | |
1293 | ||
f94e0186 SS |
1294 | case USB_SPEED_LOW: |
1295 | if (usb_endpoint_xfer_int(&ep->desc) || | |
dfa49c4a DT |
1296 | usb_endpoint_xfer_isoc(&ep->desc)) { |
1297 | ||
1298 | interval = xhci_parse_frame_interval(udev, ep); | |
f94e0186 SS |
1299 | } |
1300 | break; | |
dfa49c4a | 1301 | |
f94e0186 SS |
1302 | default: |
1303 | BUG(); | |
1304 | } | |
1305 | return EP_INTERVAL(interval); | |
1306 | } | |
1307 | ||
c30c791c | 1308 | /* The "Mult" field in the endpoint context is only set for SuperSpeed isoc eps. |
1cf62246 SS |
1309 | * High speed endpoint descriptors can define "the number of additional |
1310 | * transaction opportunities per microframe", but that goes in the Max Burst | |
1311 | * endpoint context field. | |
1312 | */ | |
575688e1 | 1313 | static u32 xhci_get_endpoint_mult(struct usb_device *udev, |
1cf62246 SS |
1314 | struct usb_host_endpoint *ep) |
1315 | { | |
c30c791c SS |
1316 | if (udev->speed != USB_SPEED_SUPER || |
1317 | !usb_endpoint_xfer_isoc(&ep->desc)) | |
1cf62246 | 1318 | return 0; |
842f1690 | 1319 | return ep->ss_ep_comp.bmAttributes; |
1cf62246 SS |
1320 | } |
1321 | ||
575688e1 | 1322 | static u32 xhci_get_endpoint_type(struct usb_device *udev, |
f94e0186 SS |
1323 | struct usb_host_endpoint *ep) |
1324 | { | |
1325 | int in; | |
1326 | u32 type; | |
1327 | ||
1328 | in = usb_endpoint_dir_in(&ep->desc); | |
1329 | if (usb_endpoint_xfer_control(&ep->desc)) { | |
1330 | type = EP_TYPE(CTRL_EP); | |
1331 | } else if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1332 | if (in) | |
1333 | type = EP_TYPE(BULK_IN_EP); | |
1334 | else | |
1335 | type = EP_TYPE(BULK_OUT_EP); | |
1336 | } else if (usb_endpoint_xfer_isoc(&ep->desc)) { | |
1337 | if (in) | |
1338 | type = EP_TYPE(ISOC_IN_EP); | |
1339 | else | |
1340 | type = EP_TYPE(ISOC_OUT_EP); | |
1341 | } else if (usb_endpoint_xfer_int(&ep->desc)) { | |
1342 | if (in) | |
1343 | type = EP_TYPE(INT_IN_EP); | |
1344 | else | |
1345 | type = EP_TYPE(INT_OUT_EP); | |
1346 | } else { | |
1347 | BUG(); | |
1348 | } | |
1349 | return type; | |
1350 | } | |
1351 | ||
9238f25d SS |
1352 | /* Return the maximum endpoint service interval time (ESIT) payload. |
1353 | * Basically, this is the maxpacket size, multiplied by the burst size | |
1354 | * and mult size. | |
1355 | */ | |
575688e1 | 1356 | static u32 xhci_get_max_esit_payload(struct xhci_hcd *xhci, |
9238f25d SS |
1357 | struct usb_device *udev, |
1358 | struct usb_host_endpoint *ep) | |
1359 | { | |
1360 | int max_burst; | |
1361 | int max_packet; | |
1362 | ||
1363 | /* Only applies for interrupt or isochronous endpoints */ | |
1364 | if (usb_endpoint_xfer_control(&ep->desc) || | |
1365 | usb_endpoint_xfer_bulk(&ep->desc)) | |
1366 | return 0; | |
1367 | ||
842f1690 | 1368 | if (udev->speed == USB_SPEED_SUPER) |
64b3c304 | 1369 | return le16_to_cpu(ep->ss_ep_comp.wBytesPerInterval); |
9238f25d | 1370 | |
29cc8897 KM |
1371 | max_packet = GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc)); |
1372 | max_burst = (usb_endpoint_maxp(&ep->desc) & 0x1800) >> 11; | |
9238f25d SS |
1373 | /* A 0 in max burst means 1 transfer per ESIT */ |
1374 | return max_packet * (max_burst + 1); | |
1375 | } | |
1376 | ||
8df75f42 SS |
1377 | /* Set up an endpoint with one ring segment. Do not allocate stream rings. |
1378 | * Drivers will have to call usb_alloc_streams() to do that. | |
1379 | */ | |
f94e0186 SS |
1380 | int xhci_endpoint_init(struct xhci_hcd *xhci, |
1381 | struct xhci_virt_device *virt_dev, | |
1382 | struct usb_device *udev, | |
f88ba78d SS |
1383 | struct usb_host_endpoint *ep, |
1384 | gfp_t mem_flags) | |
f94e0186 SS |
1385 | { |
1386 | unsigned int ep_index; | |
1387 | struct xhci_ep_ctx *ep_ctx; | |
1388 | struct xhci_ring *ep_ring; | |
1389 | unsigned int max_packet; | |
1390 | unsigned int max_burst; | |
3b72fca0 | 1391 | enum xhci_ring_type type; |
9238f25d | 1392 | u32 max_esit_payload; |
f94e0186 SS |
1393 | |
1394 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
d115b048 | 1395 | ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index); |
f94e0186 | 1396 | |
3b72fca0 | 1397 | type = usb_endpoint_type(&ep->desc); |
f94e0186 | 1398 | /* Set up the endpoint ring */ |
8dfec614 | 1399 | virt_dev->eps[ep_index].new_ring = |
2fdcd47b | 1400 | xhci_ring_alloc(xhci, 2, 1, type, mem_flags); |
74f9fe21 SS |
1401 | if (!virt_dev->eps[ep_index].new_ring) { |
1402 | /* Attempt to use the ring cache */ | |
1403 | if (virt_dev->num_rings_cached == 0) | |
1404 | return -ENOMEM; | |
1405 | virt_dev->eps[ep_index].new_ring = | |
1406 | virt_dev->ring_cache[virt_dev->num_rings_cached]; | |
1407 | virt_dev->ring_cache[virt_dev->num_rings_cached] = NULL; | |
1408 | virt_dev->num_rings_cached--; | |
7e393a83 | 1409 | xhci_reinit_cached_ring(xhci, virt_dev->eps[ep_index].new_ring, |
186a7ef1 | 1410 | 1, type); |
74f9fe21 | 1411 | } |
d18240db | 1412 | virt_dev->eps[ep_index].skip = false; |
63a0d9ab | 1413 | ep_ring = virt_dev->eps[ep_index].new_ring; |
28ccd296 | 1414 | ep_ctx->deq = cpu_to_le64(ep_ring->first_seg->dma | ep_ring->cycle_state); |
f94e0186 | 1415 | |
28ccd296 ME |
1416 | ep_ctx->ep_info = cpu_to_le32(xhci_get_endpoint_interval(udev, ep) |
1417 | | EP_MULT(xhci_get_endpoint_mult(udev, ep))); | |
f94e0186 SS |
1418 | |
1419 | /* FIXME dig Mult and streams info out of ep companion desc */ | |
1420 | ||
47692d17 | 1421 | /* Allow 3 retries for everything but isoc; |
7b1fc2ea | 1422 | * CErr shall be set to 0 for Isoch endpoints. |
47692d17 | 1423 | */ |
f94e0186 | 1424 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
28ccd296 | 1425 | ep_ctx->ep_info2 = cpu_to_le32(ERROR_COUNT(3)); |
f94e0186 | 1426 | else |
7b1fc2ea | 1427 | ep_ctx->ep_info2 = cpu_to_le32(ERROR_COUNT(0)); |
f94e0186 | 1428 | |
28ccd296 | 1429 | ep_ctx->ep_info2 |= cpu_to_le32(xhci_get_endpoint_type(udev, ep)); |
f94e0186 SS |
1430 | |
1431 | /* Set the max packet size and max burst */ | |
e4f47e36 AS |
1432 | max_packet = GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc)); |
1433 | max_burst = 0; | |
f94e0186 SS |
1434 | switch (udev->speed) { |
1435 | case USB_SPEED_SUPER: | |
b10de142 | 1436 | /* dig out max burst from ep companion desc */ |
e4f47e36 | 1437 | max_burst = ep->ss_ep_comp.bMaxBurst; |
f94e0186 SS |
1438 | break; |
1439 | case USB_SPEED_HIGH: | |
e4f47e36 AS |
1440 | /* Some devices get this wrong */ |
1441 | if (usb_endpoint_xfer_bulk(&ep->desc)) | |
1442 | max_packet = 512; | |
f94e0186 SS |
1443 | /* bits 11:12 specify the number of additional transaction |
1444 | * opportunities per microframe (USB 2.0, section 9.6.6) | |
1445 | */ | |
1446 | if (usb_endpoint_xfer_isoc(&ep->desc) || | |
1447 | usb_endpoint_xfer_int(&ep->desc)) { | |
29cc8897 | 1448 | max_burst = (usb_endpoint_maxp(&ep->desc) |
28ccd296 | 1449 | & 0x1800) >> 11; |
f94e0186 | 1450 | } |
e4f47e36 | 1451 | break; |
f94e0186 SS |
1452 | case USB_SPEED_FULL: |
1453 | case USB_SPEED_LOW: | |
f94e0186 SS |
1454 | break; |
1455 | default: | |
1456 | BUG(); | |
1457 | } | |
e4f47e36 AS |
1458 | ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet) | |
1459 | MAX_BURST(max_burst)); | |
9238f25d | 1460 | max_esit_payload = xhci_get_max_esit_payload(xhci, udev, ep); |
28ccd296 | 1461 | ep_ctx->tx_info = cpu_to_le32(MAX_ESIT_PAYLOAD_FOR_EP(max_esit_payload)); |
9238f25d SS |
1462 | |
1463 | /* | |
1464 | * XXX no idea how to calculate the average TRB buffer length for bulk | |
1465 | * endpoints, as the driver gives us no clue how big each scatter gather | |
1466 | * list entry (or buffer) is going to be. | |
1467 | * | |
1468 | * For isochronous and interrupt endpoints, we set it to the max | |
1469 | * available, until we have new API in the USB core to allow drivers to | |
1470 | * declare how much bandwidth they actually need. | |
1471 | * | |
1472 | * Normally, it would be calculated by taking the total of the buffer | |
1473 | * lengths in the TD and then dividing by the number of TRBs in a TD, | |
1474 | * including link TRBs, No-op TRBs, and Event data TRBs. Since we don't | |
1475 | * use Event Data TRBs, and we don't chain in a link TRB on short | |
1476 | * transfers, we're basically dividing by 1. | |
51eb01a7 AX |
1477 | * |
1478 | * xHCI 1.0 specification indicates that the Average TRB Length should | |
1479 | * be set to 8 for control endpoints. | |
9238f25d | 1480 | */ |
51eb01a7 AX |
1481 | if (usb_endpoint_xfer_control(&ep->desc) && xhci->hci_version == 0x100) |
1482 | ep_ctx->tx_info |= cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(8)); | |
1483 | else | |
1484 | ep_ctx->tx_info |= | |
1485 | cpu_to_le32(AVG_TRB_LENGTH_FOR_EP(max_esit_payload)); | |
9238f25d | 1486 | |
f94e0186 SS |
1487 | /* FIXME Debug endpoint context */ |
1488 | return 0; | |
1489 | } | |
1490 | ||
1491 | void xhci_endpoint_zero(struct xhci_hcd *xhci, | |
1492 | struct xhci_virt_device *virt_dev, | |
1493 | struct usb_host_endpoint *ep) | |
1494 | { | |
1495 | unsigned int ep_index; | |
1496 | struct xhci_ep_ctx *ep_ctx; | |
1497 | ||
1498 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
d115b048 | 1499 | ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index); |
f94e0186 SS |
1500 | |
1501 | ep_ctx->ep_info = 0; | |
1502 | ep_ctx->ep_info2 = 0; | |
8e595a5d | 1503 | ep_ctx->deq = 0; |
f94e0186 SS |
1504 | ep_ctx->tx_info = 0; |
1505 | /* Don't free the endpoint ring until the set interface or configuration | |
1506 | * request succeeds. | |
1507 | */ | |
1508 | } | |
1509 | ||
9af5d71d SS |
1510 | void xhci_clear_endpoint_bw_info(struct xhci_bw_info *bw_info) |
1511 | { | |
1512 | bw_info->ep_interval = 0; | |
1513 | bw_info->mult = 0; | |
1514 | bw_info->num_packets = 0; | |
1515 | bw_info->max_packet_size = 0; | |
1516 | bw_info->type = 0; | |
1517 | bw_info->max_esit_payload = 0; | |
1518 | } | |
1519 | ||
1520 | void xhci_update_bw_info(struct xhci_hcd *xhci, | |
1521 | struct xhci_container_ctx *in_ctx, | |
1522 | struct xhci_input_control_ctx *ctrl_ctx, | |
1523 | struct xhci_virt_device *virt_dev) | |
1524 | { | |
1525 | struct xhci_bw_info *bw_info; | |
1526 | struct xhci_ep_ctx *ep_ctx; | |
1527 | unsigned int ep_type; | |
1528 | int i; | |
1529 | ||
1530 | for (i = 1; i < 31; ++i) { | |
1531 | bw_info = &virt_dev->eps[i].bw_info; | |
1532 | ||
1533 | /* We can't tell what endpoint type is being dropped, but | |
1534 | * unconditionally clearing the bandwidth info for non-periodic | |
1535 | * endpoints should be harmless because the info will never be | |
1536 | * set in the first place. | |
1537 | */ | |
1538 | if (!EP_IS_ADDED(ctrl_ctx, i) && EP_IS_DROPPED(ctrl_ctx, i)) { | |
1539 | /* Dropped endpoint */ | |
1540 | xhci_clear_endpoint_bw_info(bw_info); | |
1541 | continue; | |
1542 | } | |
1543 | ||
1544 | if (EP_IS_ADDED(ctrl_ctx, i)) { | |
1545 | ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, i); | |
1546 | ep_type = CTX_TO_EP_TYPE(le32_to_cpu(ep_ctx->ep_info2)); | |
1547 | ||
1548 | /* Ignore non-periodic endpoints */ | |
1549 | if (ep_type != ISOC_OUT_EP && ep_type != INT_OUT_EP && | |
1550 | ep_type != ISOC_IN_EP && | |
1551 | ep_type != INT_IN_EP) | |
1552 | continue; | |
1553 | ||
1554 | /* Added or changed endpoint */ | |
1555 | bw_info->ep_interval = CTX_TO_EP_INTERVAL( | |
1556 | le32_to_cpu(ep_ctx->ep_info)); | |
170c0263 SS |
1557 | /* Number of packets and mult are zero-based in the |
1558 | * input context, but we want one-based for the | |
1559 | * interval table. | |
9af5d71d | 1560 | */ |
170c0263 SS |
1561 | bw_info->mult = CTX_TO_EP_MULT( |
1562 | le32_to_cpu(ep_ctx->ep_info)) + 1; | |
9af5d71d SS |
1563 | bw_info->num_packets = CTX_TO_MAX_BURST( |
1564 | le32_to_cpu(ep_ctx->ep_info2)) + 1; | |
1565 | bw_info->max_packet_size = MAX_PACKET_DECODED( | |
1566 | le32_to_cpu(ep_ctx->ep_info2)); | |
1567 | bw_info->type = ep_type; | |
1568 | bw_info->max_esit_payload = CTX_TO_MAX_ESIT_PAYLOAD( | |
1569 | le32_to_cpu(ep_ctx->tx_info)); | |
1570 | } | |
1571 | } | |
1572 | } | |
1573 | ||
f2217e8e SS |
1574 | /* Copy output xhci_ep_ctx to the input xhci_ep_ctx copy. |
1575 | * Useful when you want to change one particular aspect of the endpoint and then | |
1576 | * issue a configure endpoint command. | |
1577 | */ | |
1578 | void xhci_endpoint_copy(struct xhci_hcd *xhci, | |
913a8a34 SS |
1579 | struct xhci_container_ctx *in_ctx, |
1580 | struct xhci_container_ctx *out_ctx, | |
1581 | unsigned int ep_index) | |
f2217e8e SS |
1582 | { |
1583 | struct xhci_ep_ctx *out_ep_ctx; | |
1584 | struct xhci_ep_ctx *in_ep_ctx; | |
1585 | ||
913a8a34 SS |
1586 | out_ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
1587 | in_ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); | |
f2217e8e SS |
1588 | |
1589 | in_ep_ctx->ep_info = out_ep_ctx->ep_info; | |
1590 | in_ep_ctx->ep_info2 = out_ep_ctx->ep_info2; | |
1591 | in_ep_ctx->deq = out_ep_ctx->deq; | |
1592 | in_ep_ctx->tx_info = out_ep_ctx->tx_info; | |
1593 | } | |
1594 | ||
1595 | /* Copy output xhci_slot_ctx to the input xhci_slot_ctx. | |
1596 | * Useful when you want to change one particular aspect of the endpoint and then | |
1597 | * issue a configure endpoint command. Only the context entries field matters, | |
1598 | * but we'll copy the whole thing anyway. | |
1599 | */ | |
913a8a34 SS |
1600 | void xhci_slot_copy(struct xhci_hcd *xhci, |
1601 | struct xhci_container_ctx *in_ctx, | |
1602 | struct xhci_container_ctx *out_ctx) | |
f2217e8e SS |
1603 | { |
1604 | struct xhci_slot_ctx *in_slot_ctx; | |
1605 | struct xhci_slot_ctx *out_slot_ctx; | |
1606 | ||
913a8a34 SS |
1607 | in_slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); |
1608 | out_slot_ctx = xhci_get_slot_ctx(xhci, out_ctx); | |
f2217e8e SS |
1609 | |
1610 | in_slot_ctx->dev_info = out_slot_ctx->dev_info; | |
1611 | in_slot_ctx->dev_info2 = out_slot_ctx->dev_info2; | |
1612 | in_slot_ctx->tt_info = out_slot_ctx->tt_info; | |
1613 | in_slot_ctx->dev_state = out_slot_ctx->dev_state; | |
1614 | } | |
1615 | ||
254c80a3 JY |
1616 | /* Set up the scratchpad buffer array and scratchpad buffers, if needed. */ |
1617 | static int scratchpad_alloc(struct xhci_hcd *xhci, gfp_t flags) | |
1618 | { | |
1619 | int i; | |
1620 | struct device *dev = xhci_to_hcd(xhci)->self.controller; | |
1621 | int num_sp = HCS_MAX_SCRATCHPAD(xhci->hcs_params2); | |
1622 | ||
1623 | xhci_dbg(xhci, "Allocating %d scratchpad buffers\n", num_sp); | |
1624 | ||
1625 | if (!num_sp) | |
1626 | return 0; | |
1627 | ||
1628 | xhci->scratchpad = kzalloc(sizeof(*xhci->scratchpad), flags); | |
1629 | if (!xhci->scratchpad) | |
1630 | goto fail_sp; | |
1631 | ||
22d45f01 | 1632 | xhci->scratchpad->sp_array = dma_alloc_coherent(dev, |
254c80a3 | 1633 | num_sp * sizeof(u64), |
22d45f01 | 1634 | &xhci->scratchpad->sp_dma, flags); |
254c80a3 JY |
1635 | if (!xhci->scratchpad->sp_array) |
1636 | goto fail_sp2; | |
1637 | ||
1638 | xhci->scratchpad->sp_buffers = kzalloc(sizeof(void *) * num_sp, flags); | |
1639 | if (!xhci->scratchpad->sp_buffers) | |
1640 | goto fail_sp3; | |
1641 | ||
1642 | xhci->scratchpad->sp_dma_buffers = | |
1643 | kzalloc(sizeof(dma_addr_t) * num_sp, flags); | |
1644 | ||
1645 | if (!xhci->scratchpad->sp_dma_buffers) | |
1646 | goto fail_sp4; | |
1647 | ||
28ccd296 | 1648 | xhci->dcbaa->dev_context_ptrs[0] = cpu_to_le64(xhci->scratchpad->sp_dma); |
254c80a3 JY |
1649 | for (i = 0; i < num_sp; i++) { |
1650 | dma_addr_t dma; | |
22d45f01 SAS |
1651 | void *buf = dma_alloc_coherent(dev, xhci->page_size, &dma, |
1652 | flags); | |
254c80a3 JY |
1653 | if (!buf) |
1654 | goto fail_sp5; | |
1655 | ||
1656 | xhci->scratchpad->sp_array[i] = dma; | |
1657 | xhci->scratchpad->sp_buffers[i] = buf; | |
1658 | xhci->scratchpad->sp_dma_buffers[i] = dma; | |
1659 | } | |
1660 | ||
1661 | return 0; | |
1662 | ||
1663 | fail_sp5: | |
1664 | for (i = i - 1; i >= 0; i--) { | |
22d45f01 | 1665 | dma_free_coherent(dev, xhci->page_size, |
254c80a3 JY |
1666 | xhci->scratchpad->sp_buffers[i], |
1667 | xhci->scratchpad->sp_dma_buffers[i]); | |
1668 | } | |
1669 | kfree(xhci->scratchpad->sp_dma_buffers); | |
1670 | ||
1671 | fail_sp4: | |
1672 | kfree(xhci->scratchpad->sp_buffers); | |
1673 | ||
1674 | fail_sp3: | |
22d45f01 | 1675 | dma_free_coherent(dev, num_sp * sizeof(u64), |
254c80a3 JY |
1676 | xhci->scratchpad->sp_array, |
1677 | xhci->scratchpad->sp_dma); | |
1678 | ||
1679 | fail_sp2: | |
1680 | kfree(xhci->scratchpad); | |
1681 | xhci->scratchpad = NULL; | |
1682 | ||
1683 | fail_sp: | |
1684 | return -ENOMEM; | |
1685 | } | |
1686 | ||
1687 | static void scratchpad_free(struct xhci_hcd *xhci) | |
1688 | { | |
1689 | int num_sp; | |
1690 | int i; | |
1691 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); | |
1692 | ||
1693 | if (!xhci->scratchpad) | |
1694 | return; | |
1695 | ||
1696 | num_sp = HCS_MAX_SCRATCHPAD(xhci->hcs_params2); | |
1697 | ||
1698 | for (i = 0; i < num_sp; i++) { | |
22d45f01 | 1699 | dma_free_coherent(&pdev->dev, xhci->page_size, |
254c80a3 JY |
1700 | xhci->scratchpad->sp_buffers[i], |
1701 | xhci->scratchpad->sp_dma_buffers[i]); | |
1702 | } | |
1703 | kfree(xhci->scratchpad->sp_dma_buffers); | |
1704 | kfree(xhci->scratchpad->sp_buffers); | |
22d45f01 | 1705 | dma_free_coherent(&pdev->dev, num_sp * sizeof(u64), |
254c80a3 JY |
1706 | xhci->scratchpad->sp_array, |
1707 | xhci->scratchpad->sp_dma); | |
1708 | kfree(xhci->scratchpad); | |
1709 | xhci->scratchpad = NULL; | |
1710 | } | |
1711 | ||
913a8a34 | 1712 | struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci, |
a1d78c16 SS |
1713 | bool allocate_in_ctx, bool allocate_completion, |
1714 | gfp_t mem_flags) | |
913a8a34 SS |
1715 | { |
1716 | struct xhci_command *command; | |
1717 | ||
1718 | command = kzalloc(sizeof(*command), mem_flags); | |
1719 | if (!command) | |
1720 | return NULL; | |
1721 | ||
a1d78c16 SS |
1722 | if (allocate_in_ctx) { |
1723 | command->in_ctx = | |
1724 | xhci_alloc_container_ctx(xhci, XHCI_CTX_TYPE_INPUT, | |
1725 | mem_flags); | |
1726 | if (!command->in_ctx) { | |
1727 | kfree(command); | |
1728 | return NULL; | |
1729 | } | |
06e18291 | 1730 | } |
913a8a34 SS |
1731 | |
1732 | if (allocate_completion) { | |
1733 | command->completion = | |
1734 | kzalloc(sizeof(struct completion), mem_flags); | |
1735 | if (!command->completion) { | |
1736 | xhci_free_container_ctx(xhci, command->in_ctx); | |
06e18291 | 1737 | kfree(command); |
913a8a34 SS |
1738 | return NULL; |
1739 | } | |
1740 | init_completion(command->completion); | |
1741 | } | |
1742 | ||
1743 | command->status = 0; | |
1744 | INIT_LIST_HEAD(&command->cmd_list); | |
1745 | return command; | |
1746 | } | |
1747 | ||
8e51adcc AX |
1748 | void xhci_urb_free_priv(struct xhci_hcd *xhci, struct urb_priv *urb_priv) |
1749 | { | |
2ffdea25 AX |
1750 | if (urb_priv) { |
1751 | kfree(urb_priv->td[0]); | |
1752 | kfree(urb_priv); | |
8e51adcc | 1753 | } |
8e51adcc AX |
1754 | } |
1755 | ||
913a8a34 SS |
1756 | void xhci_free_command(struct xhci_hcd *xhci, |
1757 | struct xhci_command *command) | |
1758 | { | |
1759 | xhci_free_container_ctx(xhci, | |
1760 | command->in_ctx); | |
1761 | kfree(command->completion); | |
1762 | kfree(command); | |
1763 | } | |
1764 | ||
66d4eadd SS |
1765 | void xhci_mem_cleanup(struct xhci_hcd *xhci) |
1766 | { | |
0ebbab37 | 1767 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
9574323c | 1768 | struct dev_info *dev_info, *next; |
b92cc66c | 1769 | struct xhci_cd *cur_cd, *next_cd; |
9574323c | 1770 | unsigned long flags; |
0ebbab37 | 1771 | int size; |
32f1d2c5 | 1772 | int i, j, num_ports; |
0ebbab37 SS |
1773 | |
1774 | /* Free the Event Ring Segment Table and the actual Event Ring */ | |
0ebbab37 SS |
1775 | size = sizeof(struct xhci_erst_entry)*(xhci->erst.num_entries); |
1776 | if (xhci->erst.entries) | |
22d45f01 | 1777 | dma_free_coherent(&pdev->dev, size, |
0ebbab37 SS |
1778 | xhci->erst.entries, xhci->erst.erst_dma_addr); |
1779 | xhci->erst.entries = NULL; | |
1780 | xhci_dbg(xhci, "Freed ERST\n"); | |
1781 | if (xhci->event_ring) | |
1782 | xhci_ring_free(xhci, xhci->event_ring); | |
1783 | xhci->event_ring = NULL; | |
1784 | xhci_dbg(xhci, "Freed event ring\n"); | |
1785 | ||
dbc33303 SS |
1786 | if (xhci->lpm_command) |
1787 | xhci_free_command(xhci, xhci->lpm_command); | |
33b2831a | 1788 | xhci->cmd_ring_reserved_trbs = 0; |
0ebbab37 SS |
1789 | if (xhci->cmd_ring) |
1790 | xhci_ring_free(xhci, xhci->cmd_ring); | |
1791 | xhci->cmd_ring = NULL; | |
1792 | xhci_dbg(xhci, "Freed command ring\n"); | |
b92cc66c EF |
1793 | list_for_each_entry_safe(cur_cd, next_cd, |
1794 | &xhci->cancel_cmd_list, cancel_cmd_list) { | |
1795 | list_del(&cur_cd->cancel_cmd_list); | |
1796 | kfree(cur_cd); | |
1797 | } | |
3ffbba95 SS |
1798 | |
1799 | for (i = 1; i < MAX_HC_SLOTS; ++i) | |
1800 | xhci_free_virt_device(xhci, i); | |
1801 | ||
0ebbab37 SS |
1802 | if (xhci->segment_pool) |
1803 | dma_pool_destroy(xhci->segment_pool); | |
1804 | xhci->segment_pool = NULL; | |
1805 | xhci_dbg(xhci, "Freed segment pool\n"); | |
3ffbba95 SS |
1806 | |
1807 | if (xhci->device_pool) | |
1808 | dma_pool_destroy(xhci->device_pool); | |
1809 | xhci->device_pool = NULL; | |
1810 | xhci_dbg(xhci, "Freed device context pool\n"); | |
1811 | ||
8df75f42 SS |
1812 | if (xhci->small_streams_pool) |
1813 | dma_pool_destroy(xhci->small_streams_pool); | |
1814 | xhci->small_streams_pool = NULL; | |
1815 | xhci_dbg(xhci, "Freed small stream array pool\n"); | |
1816 | ||
1817 | if (xhci->medium_streams_pool) | |
1818 | dma_pool_destroy(xhci->medium_streams_pool); | |
1819 | xhci->medium_streams_pool = NULL; | |
1820 | xhci_dbg(xhci, "Freed medium stream array pool\n"); | |
1821 | ||
a74588f9 | 1822 | if (xhci->dcbaa) |
22d45f01 | 1823 | dma_free_coherent(&pdev->dev, sizeof(*xhci->dcbaa), |
a74588f9 SS |
1824 | xhci->dcbaa, xhci->dcbaa->dma); |
1825 | xhci->dcbaa = NULL; | |
3ffbba95 | 1826 | |
5294bea4 | 1827 | scratchpad_free(xhci); |
da6699ce | 1828 | |
9574323c AX |
1829 | spin_lock_irqsave(&xhci->lock, flags); |
1830 | list_for_each_entry_safe(dev_info, next, &xhci->lpm_failed_devs, list) { | |
1831 | list_del(&dev_info->list); | |
1832 | kfree(dev_info); | |
1833 | } | |
1834 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1835 | ||
88696ae4 VM |
1836 | if (!xhci->rh_bw) |
1837 | goto no_bw; | |
1838 | ||
32f1d2c5 TI |
1839 | num_ports = HCS_MAX_PORTS(xhci->hcs_params1); |
1840 | for (i = 0; i < num_ports; i++) { | |
1841 | struct xhci_interval_bw_table *bwt = &xhci->rh_bw[i].bw_table; | |
1842 | for (j = 0; j < XHCI_MAX_INTERVAL; j++) { | |
1843 | struct list_head *ep = &bwt->interval_bw[j].endpoints; | |
1844 | while (!list_empty(ep)) | |
1845 | list_del_init(ep->next); | |
f8a9e72d ON |
1846 | } |
1847 | } | |
1848 | ||
32f1d2c5 TI |
1849 | for (i = 0; i < num_ports; i++) { |
1850 | struct xhci_tt_bw_info *tt, *n; | |
1851 | list_for_each_entry_safe(tt, n, &xhci->rh_bw[i].tts, tt_list) { | |
1852 | list_del(&tt->tt_list); | |
1853 | kfree(tt); | |
1854 | } | |
f8a9e72d ON |
1855 | } |
1856 | ||
88696ae4 | 1857 | no_bw: |
da6699ce SS |
1858 | xhci->num_usb2_ports = 0; |
1859 | xhci->num_usb3_ports = 0; | |
f8a9e72d | 1860 | xhci->num_active_eps = 0; |
da6699ce SS |
1861 | kfree(xhci->usb2_ports); |
1862 | kfree(xhci->usb3_ports); | |
1863 | kfree(xhci->port_array); | |
839c817c | 1864 | kfree(xhci->rh_bw); |
b630d4b9 | 1865 | kfree(xhci->ext_caps); |
da6699ce | 1866 | |
66d4eadd SS |
1867 | xhci->page_size = 0; |
1868 | xhci->page_shift = 0; | |
20b67cf5 | 1869 | xhci->bus_state[0].bus_suspended = 0; |
f6ff0ac8 | 1870 | xhci->bus_state[1].bus_suspended = 0; |
66d4eadd SS |
1871 | } |
1872 | ||
6648f29d SS |
1873 | static int xhci_test_trb_in_td(struct xhci_hcd *xhci, |
1874 | struct xhci_segment *input_seg, | |
1875 | union xhci_trb *start_trb, | |
1876 | union xhci_trb *end_trb, | |
1877 | dma_addr_t input_dma, | |
1878 | struct xhci_segment *result_seg, | |
1879 | char *test_name, int test_number) | |
1880 | { | |
1881 | unsigned long long start_dma; | |
1882 | unsigned long long end_dma; | |
1883 | struct xhci_segment *seg; | |
1884 | ||
1885 | start_dma = xhci_trb_virt_to_dma(input_seg, start_trb); | |
1886 | end_dma = xhci_trb_virt_to_dma(input_seg, end_trb); | |
1887 | ||
1888 | seg = trb_in_td(input_seg, start_trb, end_trb, input_dma); | |
1889 | if (seg != result_seg) { | |
1890 | xhci_warn(xhci, "WARN: %s TRB math test %d failed!\n", | |
1891 | test_name, test_number); | |
1892 | xhci_warn(xhci, "Tested TRB math w/ seg %p and " | |
1893 | "input DMA 0x%llx\n", | |
1894 | input_seg, | |
1895 | (unsigned long long) input_dma); | |
1896 | xhci_warn(xhci, "starting TRB %p (0x%llx DMA), " | |
1897 | "ending TRB %p (0x%llx DMA)\n", | |
1898 | start_trb, start_dma, | |
1899 | end_trb, end_dma); | |
1900 | xhci_warn(xhci, "Expected seg %p, got seg %p\n", | |
1901 | result_seg, seg); | |
1902 | return -1; | |
1903 | } | |
1904 | return 0; | |
1905 | } | |
1906 | ||
1907 | /* TRB math checks for xhci_trb_in_td(), using the command and event rings. */ | |
1908 | static int xhci_check_trb_in_td_math(struct xhci_hcd *xhci, gfp_t mem_flags) | |
1909 | { | |
1910 | struct { | |
1911 | dma_addr_t input_dma; | |
1912 | struct xhci_segment *result_seg; | |
1913 | } simple_test_vector [] = { | |
1914 | /* A zeroed DMA field should fail */ | |
1915 | { 0, NULL }, | |
1916 | /* One TRB before the ring start should fail */ | |
1917 | { xhci->event_ring->first_seg->dma - 16, NULL }, | |
1918 | /* One byte before the ring start should fail */ | |
1919 | { xhci->event_ring->first_seg->dma - 1, NULL }, | |
1920 | /* Starting TRB should succeed */ | |
1921 | { xhci->event_ring->first_seg->dma, xhci->event_ring->first_seg }, | |
1922 | /* Ending TRB should succeed */ | |
1923 | { xhci->event_ring->first_seg->dma + (TRBS_PER_SEGMENT - 1)*16, | |
1924 | xhci->event_ring->first_seg }, | |
1925 | /* One byte after the ring end should fail */ | |
1926 | { xhci->event_ring->first_seg->dma + (TRBS_PER_SEGMENT - 1)*16 + 1, NULL }, | |
1927 | /* One TRB after the ring end should fail */ | |
1928 | { xhci->event_ring->first_seg->dma + (TRBS_PER_SEGMENT)*16, NULL }, | |
1929 | /* An address of all ones should fail */ | |
1930 | { (dma_addr_t) (~0), NULL }, | |
1931 | }; | |
1932 | struct { | |
1933 | struct xhci_segment *input_seg; | |
1934 | union xhci_trb *start_trb; | |
1935 | union xhci_trb *end_trb; | |
1936 | dma_addr_t input_dma; | |
1937 | struct xhci_segment *result_seg; | |
1938 | } complex_test_vector [] = { | |
1939 | /* Test feeding a valid DMA address 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->event_ring->first_seg->trbs[TRBS_PER_SEGMENT - 1], | |
1943 | .input_dma = xhci->cmd_ring->first_seg->dma, | |
1944 | .result_seg = NULL, | |
1945 | }, | |
1946 | /* Test feeding a valid end TRB from a different ring */ | |
1947 | { .input_seg = xhci->event_ring->first_seg, | |
1948 | .start_trb = xhci->event_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, | |
1951 | .result_seg = NULL, | |
1952 | }, | |
1953 | /* Test feeding a valid start and end TRB from a different ring */ | |
1954 | { .input_seg = xhci->event_ring->first_seg, | |
1955 | .start_trb = xhci->cmd_ring->first_seg->trbs, | |
1956 | .end_trb = &xhci->cmd_ring->first_seg->trbs[TRBS_PER_SEGMENT - 1], | |
1957 | .input_dma = xhci->cmd_ring->first_seg->dma, | |
1958 | .result_seg = NULL, | |
1959 | }, | |
1960 | /* TRB in this ring, but after this TD */ | |
1961 | { .input_seg = xhci->event_ring->first_seg, | |
1962 | .start_trb = &xhci->event_ring->first_seg->trbs[0], | |
1963 | .end_trb = &xhci->event_ring->first_seg->trbs[3], | |
1964 | .input_dma = xhci->event_ring->first_seg->dma + 4*16, | |
1965 | .result_seg = NULL, | |
1966 | }, | |
1967 | /* TRB in this ring, but before this TD */ | |
1968 | { .input_seg = xhci->event_ring->first_seg, | |
1969 | .start_trb = &xhci->event_ring->first_seg->trbs[3], | |
1970 | .end_trb = &xhci->event_ring->first_seg->trbs[6], | |
1971 | .input_dma = xhci->event_ring->first_seg->dma + 2*16, | |
1972 | .result_seg = NULL, | |
1973 | }, | |
1974 | /* TRB in this ring, but after 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 + 2*16, | |
1979 | .result_seg = NULL, | |
1980 | }, | |
1981 | /* TRB in this ring, but before this 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->event_ring->first_seg->dma + (TRBS_PER_SEGMENT - 4)*16, | |
1986 | .result_seg = NULL, | |
1987 | }, | |
1988 | /* TRB not in this ring, and we have a wrapped TD */ | |
1989 | { .input_seg = xhci->event_ring->first_seg, | |
1990 | .start_trb = &xhci->event_ring->first_seg->trbs[TRBS_PER_SEGMENT - 3], | |
1991 | .end_trb = &xhci->event_ring->first_seg->trbs[1], | |
1992 | .input_dma = xhci->cmd_ring->first_seg->dma + 2*16, | |
1993 | .result_seg = NULL, | |
1994 | }, | |
1995 | }; | |
1996 | ||
1997 | unsigned int num_tests; | |
1998 | int i, ret; | |
1999 | ||
e10fa478 | 2000 | num_tests = ARRAY_SIZE(simple_test_vector); |
6648f29d SS |
2001 | for (i = 0; i < num_tests; i++) { |
2002 | ret = xhci_test_trb_in_td(xhci, | |
2003 | xhci->event_ring->first_seg, | |
2004 | xhci->event_ring->first_seg->trbs, | |
2005 | &xhci->event_ring->first_seg->trbs[TRBS_PER_SEGMENT - 1], | |
2006 | simple_test_vector[i].input_dma, | |
2007 | simple_test_vector[i].result_seg, | |
2008 | "Simple", i); | |
2009 | if (ret < 0) | |
2010 | return ret; | |
2011 | } | |
2012 | ||
e10fa478 | 2013 | num_tests = ARRAY_SIZE(complex_test_vector); |
6648f29d SS |
2014 | for (i = 0; i < num_tests; i++) { |
2015 | ret = xhci_test_trb_in_td(xhci, | |
2016 | complex_test_vector[i].input_seg, | |
2017 | complex_test_vector[i].start_trb, | |
2018 | complex_test_vector[i].end_trb, | |
2019 | complex_test_vector[i].input_dma, | |
2020 | complex_test_vector[i].result_seg, | |
2021 | "Complex", i); | |
2022 | if (ret < 0) | |
2023 | return ret; | |
2024 | } | |
2025 | xhci_dbg(xhci, "TRB math tests passed.\n"); | |
2026 | return 0; | |
2027 | } | |
2028 | ||
257d585a SS |
2029 | static void xhci_set_hc_event_deq(struct xhci_hcd *xhci) |
2030 | { | |
2031 | u64 temp; | |
2032 | dma_addr_t deq; | |
2033 | ||
2034 | deq = xhci_trb_virt_to_dma(xhci->event_ring->deq_seg, | |
2035 | xhci->event_ring->dequeue); | |
2036 | if (deq == 0 && !in_interrupt()) | |
2037 | xhci_warn(xhci, "WARN something wrong with SW event ring " | |
2038 | "dequeue ptr.\n"); | |
2039 | /* Update HC event ring dequeue pointer */ | |
2040 | temp = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); | |
2041 | temp &= ERST_PTR_MASK; | |
2042 | /* Don't clear the EHB bit (which is RW1C) because | |
2043 | * there might be more events to service. | |
2044 | */ | |
2045 | temp &= ~ERST_EHB; | |
2046 | xhci_dbg(xhci, "// Write event ring dequeue pointer, " | |
2047 | "preserving EHB bit\n"); | |
2048 | xhci_write_64(xhci, ((u64) deq & (u64) ~ERST_PTR_MASK) | temp, | |
2049 | &xhci->ir_set->erst_dequeue); | |
2050 | } | |
2051 | ||
da6699ce | 2052 | static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, |
b630d4b9 | 2053 | __le32 __iomem *addr, u8 major_revision, int max_caps) |
da6699ce SS |
2054 | { |
2055 | u32 temp, port_offset, port_count; | |
2056 | int i; | |
2057 | ||
2058 | if (major_revision > 0x03) { | |
2059 | xhci_warn(xhci, "Ignoring unknown port speed, " | |
2060 | "Ext Cap %p, revision = 0x%x\n", | |
2061 | addr, major_revision); | |
2062 | /* Ignoring port protocol we can't understand. FIXME */ | |
2063 | return; | |
2064 | } | |
2065 | ||
2066 | /* Port offset and count in the third dword, see section 7.2 */ | |
2067 | temp = xhci_readl(xhci, addr + 2); | |
2068 | port_offset = XHCI_EXT_PORT_OFF(temp); | |
2069 | port_count = XHCI_EXT_PORT_COUNT(temp); | |
2070 | xhci_dbg(xhci, "Ext Cap %p, port offset = %u, " | |
2071 | "count = %u, revision = 0x%x\n", | |
2072 | addr, port_offset, port_count, major_revision); | |
2073 | /* Port count includes the current port offset */ | |
2074 | if (port_offset == 0 || (port_offset + port_count - 1) > num_ports) | |
2075 | /* WTF? "Valid values are ‘1’ to MaxPorts" */ | |
2076 | return; | |
fc71ff75 | 2077 | |
b630d4b9 MN |
2078 | /* cache usb2 port capabilities */ |
2079 | if (major_revision < 0x03 && xhci->num_ext_caps < max_caps) | |
2080 | xhci->ext_caps[xhci->num_ext_caps++] = temp; | |
2081 | ||
fc71ff75 AX |
2082 | /* Check the host's USB2 LPM capability */ |
2083 | if ((xhci->hci_version == 0x96) && (major_revision != 0x03) && | |
2084 | (temp & XHCI_L1C)) { | |
2085 | xhci_dbg(xhci, "xHCI 0.96: support USB2 software lpm\n"); | |
2086 | xhci->sw_lpm_support = 1; | |
2087 | } | |
2088 | ||
2089 | if ((xhci->hci_version >= 0x100) && (major_revision != 0x03)) { | |
2090 | xhci_dbg(xhci, "xHCI 1.0: support USB2 software lpm\n"); | |
2091 | xhci->sw_lpm_support = 1; | |
2092 | if (temp & XHCI_HLC) { | |
2093 | xhci_dbg(xhci, "xHCI 1.0: support USB2 hardware lpm\n"); | |
2094 | xhci->hw_lpm_support = 1; | |
2095 | } | |
2096 | } | |
2097 | ||
da6699ce SS |
2098 | port_offset--; |
2099 | for (i = port_offset; i < (port_offset + port_count); i++) { | |
2100 | /* Duplicate entry. Ignore the port if the revisions differ. */ | |
2101 | if (xhci->port_array[i] != 0) { | |
2102 | xhci_warn(xhci, "Duplicate port entry, Ext Cap %p," | |
2103 | " port %u\n", addr, i); | |
2104 | xhci_warn(xhci, "Port was marked as USB %u, " | |
2105 | "duplicated as USB %u\n", | |
2106 | xhci->port_array[i], major_revision); | |
2107 | /* Only adjust the roothub port counts if we haven't | |
2108 | * found a similar duplicate. | |
2109 | */ | |
2110 | if (xhci->port_array[i] != major_revision && | |
22e04870 | 2111 | xhci->port_array[i] != DUPLICATE_ENTRY) { |
da6699ce SS |
2112 | if (xhci->port_array[i] == 0x03) |
2113 | xhci->num_usb3_ports--; | |
2114 | else | |
2115 | xhci->num_usb2_ports--; | |
22e04870 | 2116 | xhci->port_array[i] = DUPLICATE_ENTRY; |
da6699ce SS |
2117 | } |
2118 | /* FIXME: Should we disable the port? */ | |
f8bbeabc | 2119 | continue; |
da6699ce SS |
2120 | } |
2121 | xhci->port_array[i] = major_revision; | |
2122 | if (major_revision == 0x03) | |
2123 | xhci->num_usb3_ports++; | |
2124 | else | |
2125 | xhci->num_usb2_ports++; | |
2126 | } | |
2127 | /* FIXME: Should we disable ports not in the Extended Capabilities? */ | |
2128 | } | |
2129 | ||
2130 | /* | |
2131 | * Scan the Extended Capabilities for the "Supported Protocol Capabilities" that | |
2132 | * specify what speeds each port is supposed to be. We can't count on the port | |
2133 | * speed bits in the PORTSC register being correct until a device is connected, | |
2134 | * but we need to set up the two fake roothubs with the correct number of USB | |
2135 | * 3.0 and USB 2.0 ports at host controller initialization time. | |
2136 | */ | |
2137 | static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) | |
2138 | { | |
b630d4b9 MN |
2139 | __le32 __iomem *addr, *tmp_addr; |
2140 | u32 offset, tmp_offset; | |
da6699ce | 2141 | unsigned int num_ports; |
2e27980e | 2142 | int i, j, port_index; |
b630d4b9 | 2143 | int cap_count = 0; |
da6699ce SS |
2144 | |
2145 | addr = &xhci->cap_regs->hcc_params; | |
2146 | offset = XHCI_HCC_EXT_CAPS(xhci_readl(xhci, addr)); | |
2147 | if (offset == 0) { | |
2148 | xhci_err(xhci, "No Extended Capability registers, " | |
2149 | "unable to set up roothub.\n"); | |
2150 | return -ENODEV; | |
2151 | } | |
2152 | ||
2153 | num_ports = HCS_MAX_PORTS(xhci->hcs_params1); | |
2154 | xhci->port_array = kzalloc(sizeof(*xhci->port_array)*num_ports, flags); | |
2155 | if (!xhci->port_array) | |
2156 | return -ENOMEM; | |
2157 | ||
839c817c SS |
2158 | xhci->rh_bw = kzalloc(sizeof(*xhci->rh_bw)*num_ports, flags); |
2159 | if (!xhci->rh_bw) | |
2160 | return -ENOMEM; | |
2e27980e SS |
2161 | for (i = 0; i < num_ports; i++) { |
2162 | struct xhci_interval_bw_table *bw_table; | |
2163 | ||
839c817c | 2164 | INIT_LIST_HEAD(&xhci->rh_bw[i].tts); |
2e27980e SS |
2165 | bw_table = &xhci->rh_bw[i].bw_table; |
2166 | for (j = 0; j < XHCI_MAX_INTERVAL; j++) | |
2167 | INIT_LIST_HEAD(&bw_table->interval_bw[j].endpoints); | |
2168 | } | |
839c817c | 2169 | |
da6699ce SS |
2170 | /* |
2171 | * For whatever reason, the first capability offset is from the | |
2172 | * capability register base, not from the HCCPARAMS register. | |
2173 | * See section 5.3.6 for offset calculation. | |
2174 | */ | |
2175 | addr = &xhci->cap_regs->hc_capbase + offset; | |
b630d4b9 MN |
2176 | |
2177 | tmp_addr = addr; | |
2178 | tmp_offset = offset; | |
2179 | ||
2180 | /* count extended protocol capability entries for later caching */ | |
2181 | do { | |
2182 | u32 cap_id; | |
2183 | cap_id = xhci_readl(xhci, tmp_addr); | |
2184 | if (XHCI_EXT_CAPS_ID(cap_id) == XHCI_EXT_CAPS_PROTOCOL) | |
2185 | cap_count++; | |
2186 | tmp_offset = XHCI_EXT_CAPS_NEXT(cap_id); | |
2187 | tmp_addr += tmp_offset; | |
2188 | } while (tmp_offset); | |
2189 | ||
2190 | xhci->ext_caps = kzalloc(sizeof(*xhci->ext_caps) * cap_count, flags); | |
2191 | if (!xhci->ext_caps) | |
2192 | return -ENOMEM; | |
2193 | ||
da6699ce SS |
2194 | while (1) { |
2195 | u32 cap_id; | |
2196 | ||
2197 | cap_id = xhci_readl(xhci, addr); | |
2198 | if (XHCI_EXT_CAPS_ID(cap_id) == XHCI_EXT_CAPS_PROTOCOL) | |
2199 | xhci_add_in_port(xhci, num_ports, addr, | |
b630d4b9 MN |
2200 | (u8) XHCI_EXT_PORT_MAJOR(cap_id), |
2201 | cap_count); | |
da6699ce SS |
2202 | offset = XHCI_EXT_CAPS_NEXT(cap_id); |
2203 | if (!offset || (xhci->num_usb2_ports + xhci->num_usb3_ports) | |
2204 | == num_ports) | |
2205 | break; | |
2206 | /* | |
2207 | * Once you're into the Extended Capabilities, the offset is | |
2208 | * always relative to the register holding the offset. | |
2209 | */ | |
2210 | addr += offset; | |
2211 | } | |
2212 | ||
2213 | if (xhci->num_usb2_ports == 0 && xhci->num_usb3_ports == 0) { | |
2214 | xhci_warn(xhci, "No ports on the roothubs?\n"); | |
2215 | return -ENODEV; | |
2216 | } | |
2217 | xhci_dbg(xhci, "Found %u USB 2.0 ports and %u USB 3.0 ports.\n", | |
2218 | xhci->num_usb2_ports, xhci->num_usb3_ports); | |
d30b2a20 SS |
2219 | |
2220 | /* Place limits on the number of roothub ports so that the hub | |
2221 | * descriptors aren't longer than the USB core will allocate. | |
2222 | */ | |
2223 | if (xhci->num_usb3_ports > 15) { | |
2224 | xhci_dbg(xhci, "Limiting USB 3.0 roothub ports to 15.\n"); | |
2225 | xhci->num_usb3_ports = 15; | |
2226 | } | |
2227 | if (xhci->num_usb2_ports > USB_MAXCHILDREN) { | |
2228 | xhci_dbg(xhci, "Limiting USB 2.0 roothub ports to %u.\n", | |
2229 | USB_MAXCHILDREN); | |
2230 | xhci->num_usb2_ports = USB_MAXCHILDREN; | |
2231 | } | |
2232 | ||
da6699ce SS |
2233 | /* |
2234 | * Note we could have all USB 3.0 ports, or all USB 2.0 ports. | |
2235 | * Not sure how the USB core will handle a hub with no ports... | |
2236 | */ | |
2237 | if (xhci->num_usb2_ports) { | |
2238 | xhci->usb2_ports = kmalloc(sizeof(*xhci->usb2_ports)* | |
2239 | xhci->num_usb2_ports, flags); | |
2240 | if (!xhci->usb2_ports) | |
2241 | return -ENOMEM; | |
2242 | ||
2243 | port_index = 0; | |
f8bbeabc SS |
2244 | for (i = 0; i < num_ports; i++) { |
2245 | if (xhci->port_array[i] == 0x03 || | |
2246 | xhci->port_array[i] == 0 || | |
22e04870 | 2247 | xhci->port_array[i] == DUPLICATE_ENTRY) |
f8bbeabc SS |
2248 | continue; |
2249 | ||
2250 | xhci->usb2_ports[port_index] = | |
2251 | &xhci->op_regs->port_status_base + | |
2252 | NUM_PORT_REGS*i; | |
2253 | xhci_dbg(xhci, "USB 2.0 port at index %u, " | |
2254 | "addr = %p\n", i, | |
2255 | xhci->usb2_ports[port_index]); | |
2256 | port_index++; | |
d30b2a20 SS |
2257 | if (port_index == xhci->num_usb2_ports) |
2258 | break; | |
f8bbeabc | 2259 | } |
da6699ce SS |
2260 | } |
2261 | if (xhci->num_usb3_ports) { | |
2262 | xhci->usb3_ports = kmalloc(sizeof(*xhci->usb3_ports)* | |
2263 | xhci->num_usb3_ports, flags); | |
2264 | if (!xhci->usb3_ports) | |
2265 | return -ENOMEM; | |
2266 | ||
2267 | port_index = 0; | |
2268 | for (i = 0; i < num_ports; i++) | |
2269 | if (xhci->port_array[i] == 0x03) { | |
2270 | xhci->usb3_ports[port_index] = | |
2271 | &xhci->op_regs->port_status_base + | |
2272 | NUM_PORT_REGS*i; | |
2273 | xhci_dbg(xhci, "USB 3.0 port at index %u, " | |
2274 | "addr = %p\n", i, | |
2275 | xhci->usb3_ports[port_index]); | |
2276 | port_index++; | |
d30b2a20 SS |
2277 | if (port_index == xhci->num_usb3_ports) |
2278 | break; | |
da6699ce SS |
2279 | } |
2280 | } | |
2281 | return 0; | |
2282 | } | |
6648f29d | 2283 | |
66d4eadd SS |
2284 | int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags) |
2285 | { | |
0ebbab37 SS |
2286 | dma_addr_t dma; |
2287 | struct device *dev = xhci_to_hcd(xhci)->self.controller; | |
66d4eadd | 2288 | unsigned int val, val2; |
8e595a5d | 2289 | u64 val_64; |
0ebbab37 | 2290 | struct xhci_segment *seg; |
623bef9e | 2291 | u32 page_size, temp; |
66d4eadd SS |
2292 | int i; |
2293 | ||
331de00a SA |
2294 | INIT_LIST_HEAD(&xhci->lpm_failed_devs); |
2295 | INIT_LIST_HEAD(&xhci->cancel_cmd_list); | |
2296 | ||
66d4eadd SS |
2297 | page_size = xhci_readl(xhci, &xhci->op_regs->page_size); |
2298 | xhci_dbg(xhci, "Supported page size register = 0x%x\n", page_size); | |
2299 | for (i = 0; i < 16; i++) { | |
2300 | if ((0x1 & page_size) != 0) | |
2301 | break; | |
2302 | page_size = page_size >> 1; | |
2303 | } | |
2304 | if (i < 16) | |
2305 | xhci_dbg(xhci, "Supported page size of %iK\n", (1 << (i+12)) / 1024); | |
2306 | else | |
2307 | xhci_warn(xhci, "WARN: no supported page size\n"); | |
2308 | /* Use 4K pages, since that's common and the minimum the HC supports */ | |
2309 | xhci->page_shift = 12; | |
2310 | xhci->page_size = 1 << xhci->page_shift; | |
2311 | xhci_dbg(xhci, "HCD page size set to %iK\n", xhci->page_size / 1024); | |
2312 | ||
2313 | /* | |
2314 | * Program the Number of Device Slots Enabled field in the CONFIG | |
2315 | * register with the max value of slots the HC can handle. | |
2316 | */ | |
2317 | val = HCS_MAX_SLOTS(xhci_readl(xhci, &xhci->cap_regs->hcs_params1)); | |
2318 | xhci_dbg(xhci, "// xHC can handle at most %d device slots.\n", | |
2319 | (unsigned int) val); | |
2320 | val2 = xhci_readl(xhci, &xhci->op_regs->config_reg); | |
2321 | val |= (val2 & ~HCS_SLOTS_MASK); | |
2322 | xhci_dbg(xhci, "// Setting Max device slots reg = 0x%x.\n", | |
2323 | (unsigned int) val); | |
2324 | xhci_writel(xhci, val, &xhci->op_regs->config_reg); | |
2325 | ||
a74588f9 SS |
2326 | /* |
2327 | * Section 5.4.8 - doorbell array must be | |
2328 | * "physically contiguous and 64-byte (cache line) aligned". | |
2329 | */ | |
22d45f01 SAS |
2330 | xhci->dcbaa = dma_alloc_coherent(dev, sizeof(*xhci->dcbaa), &dma, |
2331 | GFP_KERNEL); | |
a74588f9 SS |
2332 | if (!xhci->dcbaa) |
2333 | goto fail; | |
2334 | memset(xhci->dcbaa, 0, sizeof *(xhci->dcbaa)); | |
2335 | xhci->dcbaa->dma = dma; | |
700e2052 GKH |
2336 | xhci_dbg(xhci, "// Device context base array address = 0x%llx (DMA), %p (virt)\n", |
2337 | (unsigned long long)xhci->dcbaa->dma, xhci->dcbaa); | |
8e595a5d | 2338 | xhci_write_64(xhci, dma, &xhci->op_regs->dcbaa_ptr); |
a74588f9 | 2339 | |
0ebbab37 SS |
2340 | /* |
2341 | * Initialize the ring segment pool. The ring must be a contiguous | |
2342 | * structure comprised of TRBs. The TRBs must be 16 byte aligned, | |
2343 | * however, the command ring segment needs 64-byte aligned segments, | |
2344 | * so we pick the greater alignment need. | |
2345 | */ | |
2346 | xhci->segment_pool = dma_pool_create("xHCI ring segments", dev, | |
eb8ccd2b | 2347 | TRB_SEGMENT_SIZE, 64, xhci->page_size); |
d115b048 | 2348 | |
3ffbba95 | 2349 | /* See Table 46 and Note on Figure 55 */ |
3ffbba95 | 2350 | xhci->device_pool = dma_pool_create("xHCI input/output contexts", dev, |
d115b048 | 2351 | 2112, 64, xhci->page_size); |
3ffbba95 | 2352 | if (!xhci->segment_pool || !xhci->device_pool) |
0ebbab37 SS |
2353 | goto fail; |
2354 | ||
8df75f42 SS |
2355 | /* Linear stream context arrays don't have any boundary restrictions, |
2356 | * and only need to be 16-byte aligned. | |
2357 | */ | |
2358 | xhci->small_streams_pool = | |
2359 | dma_pool_create("xHCI 256 byte stream ctx arrays", | |
2360 | dev, SMALL_STREAM_ARRAY_SIZE, 16, 0); | |
2361 | xhci->medium_streams_pool = | |
2362 | dma_pool_create("xHCI 1KB stream ctx arrays", | |
2363 | dev, MEDIUM_STREAM_ARRAY_SIZE, 16, 0); | |
2364 | /* Any stream context array bigger than MEDIUM_STREAM_ARRAY_SIZE | |
22d45f01 | 2365 | * will be allocated with dma_alloc_coherent() |
8df75f42 SS |
2366 | */ |
2367 | ||
2368 | if (!xhci->small_streams_pool || !xhci->medium_streams_pool) | |
2369 | goto fail; | |
2370 | ||
0ebbab37 | 2371 | /* Set up the command ring to have one segments for now. */ |
186a7ef1 | 2372 | xhci->cmd_ring = xhci_ring_alloc(xhci, 1, 1, TYPE_COMMAND, flags); |
0ebbab37 SS |
2373 | if (!xhci->cmd_ring) |
2374 | goto fail; | |
700e2052 GKH |
2375 | xhci_dbg(xhci, "Allocated command ring at %p\n", xhci->cmd_ring); |
2376 | xhci_dbg(xhci, "First segment DMA is 0x%llx\n", | |
2377 | (unsigned long long)xhci->cmd_ring->first_seg->dma); | |
0ebbab37 SS |
2378 | |
2379 | /* Set the address in the Command Ring Control register */ | |
8e595a5d SS |
2380 | val_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); |
2381 | val_64 = (val_64 & (u64) CMD_RING_RSVD_BITS) | | |
2382 | (xhci->cmd_ring->first_seg->dma & (u64) ~CMD_RING_RSVD_BITS) | | |
0ebbab37 | 2383 | xhci->cmd_ring->cycle_state; |
8e595a5d SS |
2384 | xhci_dbg(xhci, "// Setting command ring address to 0x%x\n", val); |
2385 | xhci_write_64(xhci, val_64, &xhci->op_regs->cmd_ring); | |
0ebbab37 SS |
2386 | xhci_dbg_cmd_ptrs(xhci); |
2387 | ||
dbc33303 SS |
2388 | xhci->lpm_command = xhci_alloc_command(xhci, true, true, flags); |
2389 | if (!xhci->lpm_command) | |
2390 | goto fail; | |
2391 | ||
2392 | /* Reserve one command ring TRB for disabling LPM. | |
2393 | * Since the USB core grabs the shared usb_bus bandwidth mutex before | |
2394 | * disabling LPM, we only need to reserve one TRB for all devices. | |
2395 | */ | |
2396 | xhci->cmd_ring_reserved_trbs++; | |
2397 | ||
0ebbab37 SS |
2398 | val = xhci_readl(xhci, &xhci->cap_regs->db_off); |
2399 | val &= DBOFF_MASK; | |
2400 | xhci_dbg(xhci, "// Doorbell array is located at offset 0x%x" | |
2401 | " from cap regs base addr\n", val); | |
c50a00f8 | 2402 | xhci->dba = (void __iomem *) xhci->cap_regs + val; |
0ebbab37 SS |
2403 | xhci_dbg_regs(xhci); |
2404 | xhci_print_run_regs(xhci); | |
2405 | /* Set ir_set to interrupt register set 0 */ | |
c50a00f8 | 2406 | xhci->ir_set = &xhci->run_regs->ir_set[0]; |
0ebbab37 SS |
2407 | |
2408 | /* | |
2409 | * Event ring setup: Allocate a normal ring, but also setup | |
2410 | * the event ring segment table (ERST). Section 4.9.3. | |
2411 | */ | |
2412 | xhci_dbg(xhci, "// Allocating event ring\n"); | |
186a7ef1 | 2413 | xhci->event_ring = xhci_ring_alloc(xhci, ERST_NUM_SEGS, 1, TYPE_EVENT, |
7e393a83 | 2414 | flags); |
0ebbab37 SS |
2415 | if (!xhci->event_ring) |
2416 | goto fail; | |
6648f29d SS |
2417 | if (xhci_check_trb_in_td_math(xhci, flags) < 0) |
2418 | goto fail; | |
0ebbab37 | 2419 | |
22d45f01 SAS |
2420 | xhci->erst.entries = dma_alloc_coherent(dev, |
2421 | sizeof(struct xhci_erst_entry) * ERST_NUM_SEGS, &dma, | |
2422 | GFP_KERNEL); | |
0ebbab37 SS |
2423 | if (!xhci->erst.entries) |
2424 | goto fail; | |
700e2052 GKH |
2425 | xhci_dbg(xhci, "// Allocated event ring segment table at 0x%llx\n", |
2426 | (unsigned long long)dma); | |
0ebbab37 SS |
2427 | |
2428 | memset(xhci->erst.entries, 0, sizeof(struct xhci_erst_entry)*ERST_NUM_SEGS); | |
2429 | xhci->erst.num_entries = ERST_NUM_SEGS; | |
2430 | xhci->erst.erst_dma_addr = dma; | |
700e2052 | 2431 | xhci_dbg(xhci, "Set ERST to 0; private num segs = %i, virt addr = %p, dma addr = 0x%llx\n", |
0ebbab37 | 2432 | xhci->erst.num_entries, |
700e2052 GKH |
2433 | xhci->erst.entries, |
2434 | (unsigned long long)xhci->erst.erst_dma_addr); | |
0ebbab37 SS |
2435 | |
2436 | /* set ring base address and size for each segment table entry */ | |
2437 | for (val = 0, seg = xhci->event_ring->first_seg; val < ERST_NUM_SEGS; val++) { | |
2438 | struct xhci_erst_entry *entry = &xhci->erst.entries[val]; | |
28ccd296 ME |
2439 | entry->seg_addr = cpu_to_le64(seg->dma); |
2440 | entry->seg_size = cpu_to_le32(TRBS_PER_SEGMENT); | |
0ebbab37 SS |
2441 | entry->rsvd = 0; |
2442 | seg = seg->next; | |
2443 | } | |
2444 | ||
2445 | /* set ERST count with the number of entries in the segment table */ | |
2446 | val = xhci_readl(xhci, &xhci->ir_set->erst_size); | |
2447 | val &= ERST_SIZE_MASK; | |
2448 | val |= ERST_NUM_SEGS; | |
2449 | xhci_dbg(xhci, "// Write ERST size = %i to ir_set 0 (some bits preserved)\n", | |
2450 | val); | |
2451 | xhci_writel(xhci, val, &xhci->ir_set->erst_size); | |
2452 | ||
2453 | xhci_dbg(xhci, "// Set ERST entries to point to event ring.\n"); | |
2454 | /* set the segment table base address */ | |
700e2052 GKH |
2455 | xhci_dbg(xhci, "// Set ERST base address for ir_set 0 = 0x%llx\n", |
2456 | (unsigned long long)xhci->erst.erst_dma_addr); | |
8e595a5d SS |
2457 | val_64 = xhci_read_64(xhci, &xhci->ir_set->erst_base); |
2458 | val_64 &= ERST_PTR_MASK; | |
2459 | val_64 |= (xhci->erst.erst_dma_addr & (u64) ~ERST_PTR_MASK); | |
2460 | xhci_write_64(xhci, val_64, &xhci->ir_set->erst_base); | |
0ebbab37 SS |
2461 | |
2462 | /* Set the event ring dequeue address */ | |
23e3be11 | 2463 | xhci_set_hc_event_deq(xhci); |
0ebbab37 | 2464 | xhci_dbg(xhci, "Wrote ERST address to ir_set 0.\n"); |
09ece30e | 2465 | xhci_print_ir_set(xhci, 0); |
0ebbab37 SS |
2466 | |
2467 | /* | |
2468 | * XXX: Might need to set the Interrupter Moderation Register to | |
2469 | * something other than the default (~1ms minimum between interrupts). | |
2470 | * See section 5.5.1.2. | |
2471 | */ | |
3ffbba95 SS |
2472 | init_completion(&xhci->addr_dev); |
2473 | for (i = 0; i < MAX_HC_SLOTS; ++i) | |
326b4810 | 2474 | xhci->devs[i] = NULL; |
f6ff0ac8 | 2475 | for (i = 0; i < USB_MAXCHILDREN; ++i) { |
20b67cf5 | 2476 | xhci->bus_state[0].resume_done[i] = 0; |
f6ff0ac8 SS |
2477 | xhci->bus_state[1].resume_done[i] = 0; |
2478 | } | |
66d4eadd | 2479 | |
254c80a3 JY |
2480 | if (scratchpad_alloc(xhci, flags)) |
2481 | goto fail; | |
da6699ce SS |
2482 | if (xhci_setup_port_arrays(xhci, flags)) |
2483 | goto fail; | |
254c80a3 | 2484 | |
623bef9e SS |
2485 | /* Enable USB 3.0 device notifications for function remote wake, which |
2486 | * is necessary for allowing USB 3.0 devices to do remote wakeup from | |
2487 | * U3 (device suspend). | |
2488 | */ | |
2489 | temp = xhci_readl(xhci, &xhci->op_regs->dev_notification); | |
2490 | temp &= ~DEV_NOTE_MASK; | |
2491 | temp |= DEV_NOTE_FWAKE; | |
2492 | xhci_writel(xhci, temp, &xhci->op_regs->dev_notification); | |
2493 | ||
66d4eadd | 2494 | return 0; |
254c80a3 | 2495 | |
66d4eadd SS |
2496 | fail: |
2497 | xhci_warn(xhci, "Couldn't initialize memory\n"); | |
159e1fcc SS |
2498 | xhci_halt(xhci); |
2499 | xhci_reset(xhci); | |
66d4eadd SS |
2500 | xhci_mem_cleanup(xhci); |
2501 | return -ENOMEM; | |
2502 | } |