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Commit | Line | Data |
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7f84eef0 SS |
1 | /* |
2 | * xHCI host controller driver | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp. | |
5 | * | |
6 | * Author: Sarah Sharp | |
7 | * Some code borrowed from the Linux EHCI driver. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | * for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software Foundation, | |
20 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
23 | /* | |
24 | * Ring initialization rules: | |
25 | * 1. Each segment is initialized to zero, except for link TRBs. | |
26 | * 2. Ring cycle state = 0. This represents Producer Cycle State (PCS) or | |
27 | * Consumer Cycle State (CCS), depending on ring function. | |
28 | * 3. Enqueue pointer = dequeue pointer = address of first TRB in the segment. | |
29 | * | |
30 | * Ring behavior rules: | |
31 | * 1. A ring is empty if enqueue == dequeue. This means there will always be at | |
32 | * least one free TRB in the ring. This is useful if you want to turn that | |
33 | * into a link TRB and expand the ring. | |
34 | * 2. When incrementing an enqueue or dequeue pointer, if the next TRB is a | |
35 | * link TRB, then load the pointer with the address in the link TRB. If the | |
36 | * link TRB had its toggle bit set, you may need to update the ring cycle | |
37 | * state (see cycle bit rules). You may have to do this multiple times | |
38 | * until you reach a non-link TRB. | |
39 | * 3. A ring is full if enqueue++ (for the definition of increment above) | |
40 | * equals the dequeue pointer. | |
41 | * | |
42 | * Cycle bit rules: | |
43 | * 1. When a consumer increments a dequeue pointer and encounters a toggle bit | |
44 | * in a link TRB, it must toggle the ring cycle state. | |
45 | * 2. When a producer increments an enqueue pointer and encounters a toggle bit | |
46 | * in a link TRB, it must toggle the ring cycle state. | |
47 | * | |
48 | * Producer rules: | |
49 | * 1. Check if ring is full before you enqueue. | |
50 | * 2. Write the ring cycle state to the cycle bit in the TRB you're enqueuing. | |
51 | * Update enqueue pointer between each write (which may update the ring | |
52 | * cycle state). | |
53 | * 3. Notify consumer. If SW is producer, it rings the doorbell for command | |
54 | * and endpoint rings. If HC is the producer for the event ring, | |
55 | * and it generates an interrupt according to interrupt modulation rules. | |
56 | * | |
57 | * Consumer rules: | |
58 | * 1. Check if TRB belongs to you. If the cycle bit == your ring cycle state, | |
59 | * the TRB is owned by the consumer. | |
60 | * 2. Update dequeue pointer (which may update the ring cycle state) and | |
61 | * continue processing TRBs until you reach a TRB which is not owned by you. | |
62 | * 3. Notify the producer. SW is the consumer for the event ring, and it | |
63 | * updates event ring dequeue pointer. HC is the consumer for the command and | |
64 | * endpoint rings; it generates events on the event ring for these. | |
65 | */ | |
66 | ||
8a96c052 | 67 | #include <linux/scatterlist.h> |
5a0e3ad6 | 68 | #include <linux/slab.h> |
f9c589e1 | 69 | #include <linux/dma-mapping.h> |
7f84eef0 | 70 | #include "xhci.h" |
3a7fa5be | 71 | #include "xhci-trace.h" |
0cbd4b34 | 72 | #include "xhci-mtk.h" |
7f84eef0 SS |
73 | |
74 | /* | |
75 | * Returns zero if the TRB isn't in this segment, otherwise it returns the DMA | |
76 | * address of the TRB. | |
77 | */ | |
23e3be11 | 78 | dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, |
7f84eef0 SS |
79 | union xhci_trb *trb) |
80 | { | |
6071d836 | 81 | unsigned long segment_offset; |
7f84eef0 | 82 | |
6071d836 | 83 | if (!seg || !trb || trb < seg->trbs) |
7f84eef0 | 84 | return 0; |
6071d836 SS |
85 | /* offset in TRBs */ |
86 | segment_offset = trb - seg->trbs; | |
7895086a | 87 | if (segment_offset >= TRBS_PER_SEGMENT) |
7f84eef0 | 88 | return 0; |
6071d836 | 89 | return seg->dma + (segment_offset * sizeof(*trb)); |
7f84eef0 SS |
90 | } |
91 | ||
0ce57499 MN |
92 | static bool trb_is_noop(union xhci_trb *trb) |
93 | { | |
94 | return TRB_TYPE_NOOP_LE32(trb->generic.field[3]); | |
95 | } | |
96 | ||
2d98ef40 MN |
97 | static bool trb_is_link(union xhci_trb *trb) |
98 | { | |
99 | return TRB_TYPE_LINK_LE32(trb->link.control); | |
100 | } | |
101 | ||
bd5e67f5 MN |
102 | static bool last_trb_on_seg(struct xhci_segment *seg, union xhci_trb *trb) |
103 | { | |
104 | return trb == &seg->trbs[TRBS_PER_SEGMENT - 1]; | |
105 | } | |
106 | ||
107 | static bool last_trb_on_ring(struct xhci_ring *ring, | |
108 | struct xhci_segment *seg, union xhci_trb *trb) | |
109 | { | |
110 | return last_trb_on_seg(seg, trb) && (seg->next == ring->first_seg); | |
111 | } | |
112 | ||
d0c77d84 MN |
113 | static bool link_trb_toggles_cycle(union xhci_trb *trb) |
114 | { | |
115 | return le32_to_cpu(trb->link.control) & LINK_TOGGLE; | |
116 | } | |
117 | ||
ae636747 SS |
118 | /* Updates trb to point to the next TRB in the ring, and updates seg if the next |
119 | * TRB is in a new segment. This does not skip over link TRBs, and it does not | |
120 | * effect the ring dequeue or enqueue pointers. | |
121 | */ | |
122 | static void next_trb(struct xhci_hcd *xhci, | |
123 | struct xhci_ring *ring, | |
124 | struct xhci_segment **seg, | |
125 | union xhci_trb **trb) | |
126 | { | |
2d98ef40 | 127 | if (trb_is_link(*trb)) { |
ae636747 SS |
128 | *seg = (*seg)->next; |
129 | *trb = ((*seg)->trbs); | |
130 | } else { | |
a1669b2c | 131 | (*trb)++; |
ae636747 SS |
132 | } |
133 | } | |
134 | ||
7f84eef0 SS |
135 | /* |
136 | * See Cycle bit rules. SW is the consumer for the event ring only. | |
137 | * Don't make a ring full of link TRBs. That would be dumb and this would loop. | |
138 | */ | |
3b72fca0 | 139 | static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring) |
7f84eef0 | 140 | { |
7f84eef0 | 141 | ring->deq_updates++; |
b008df60 | 142 | |
bd5e67f5 MN |
143 | /* event ring doesn't have link trbs, check for last trb */ |
144 | if (ring->type == TYPE_EVENT) { | |
145 | if (!last_trb_on_seg(ring->deq_seg, ring->dequeue)) { | |
50d0206f | 146 | ring->dequeue++; |
bd5e67f5 | 147 | return; |
7f84eef0 | 148 | } |
bd5e67f5 MN |
149 | if (last_trb_on_ring(ring, ring->deq_seg, ring->dequeue)) |
150 | ring->cycle_state ^= 1; | |
151 | ring->deq_seg = ring->deq_seg->next; | |
152 | ring->dequeue = ring->deq_seg->trbs; | |
153 | return; | |
154 | } | |
155 | ||
156 | /* All other rings have link trbs */ | |
157 | if (!trb_is_link(ring->dequeue)) { | |
158 | ring->dequeue++; | |
159 | ring->num_trbs_free++; | |
160 | } | |
161 | while (trb_is_link(ring->dequeue)) { | |
162 | ring->deq_seg = ring->deq_seg->next; | |
163 | ring->dequeue = ring->deq_seg->trbs; | |
164 | } | |
165 | return; | |
7f84eef0 SS |
166 | } |
167 | ||
168 | /* | |
169 | * See Cycle bit rules. SW is the consumer for the event ring only. | |
170 | * Don't make a ring full of link TRBs. That would be dumb and this would loop. | |
171 | * | |
172 | * If we've just enqueued a TRB that is in the middle of a TD (meaning the | |
173 | * chain bit is set), then set the chain bit in all the following link TRBs. | |
174 | * If we've enqueued the last TRB in a TD, make sure the following link TRBs | |
175 | * have their chain bit cleared (so that each Link TRB is a separate TD). | |
176 | * | |
177 | * Section 6.4.4.1 of the 0.95 spec says link TRBs cannot have the chain bit | |
b0567b3f SS |
178 | * set, but other sections talk about dealing with the chain bit set. This was |
179 | * fixed in the 0.96 specification errata, but we have to assume that all 0.95 | |
180 | * xHCI hardware can't handle the chain bit being cleared on a link TRB. | |
6cc30d85 SS |
181 | * |
182 | * @more_trbs_coming: Will you enqueue more TRBs before calling | |
183 | * prepare_transfer()? | |
7f84eef0 | 184 | */ |
6cc30d85 | 185 | static void inc_enq(struct xhci_hcd *xhci, struct xhci_ring *ring, |
3b72fca0 | 186 | bool more_trbs_coming) |
7f84eef0 SS |
187 | { |
188 | u32 chain; | |
189 | union xhci_trb *next; | |
190 | ||
28ccd296 | 191 | chain = le32_to_cpu(ring->enqueue->generic.field[3]) & TRB_CHAIN; |
b008df60 | 192 | /* If this is not event ring, there is one less usable TRB */ |
2d98ef40 | 193 | if (!trb_is_link(ring->enqueue)) |
b008df60 | 194 | ring->num_trbs_free--; |
7f84eef0 SS |
195 | next = ++(ring->enqueue); |
196 | ||
197 | ring->enq_updates++; | |
2251198b | 198 | /* Update the dequeue pointer further if that was a link TRB */ |
2d98ef40 | 199 | while (trb_is_link(next)) { |
6cc30d85 | 200 | |
2251198b MN |
201 | /* |
202 | * If the caller doesn't plan on enqueueing more TDs before | |
203 | * ringing the doorbell, then we don't want to give the link TRB | |
204 | * to the hardware just yet. We'll give the link TRB back in | |
205 | * prepare_ring() just before we enqueue the TD at the top of | |
206 | * the ring. | |
207 | */ | |
208 | if (!chain && !more_trbs_coming) | |
209 | break; | |
3b72fca0 | 210 | |
2251198b MN |
211 | /* If we're not dealing with 0.95 hardware or isoc rings on |
212 | * AMD 0.96 host, carry over the chain bit of the previous TRB | |
213 | * (which may mean the chain bit is cleared). | |
214 | */ | |
215 | if (!(ring->type == TYPE_ISOC && | |
216 | (xhci->quirks & XHCI_AMD_0x96_HOST)) && | |
217 | !xhci_link_trb_quirk(xhci)) { | |
218 | next->link.control &= cpu_to_le32(~TRB_CHAIN); | |
219 | next->link.control |= cpu_to_le32(chain); | |
7f84eef0 | 220 | } |
2251198b MN |
221 | /* Give this link TRB to the hardware */ |
222 | wmb(); | |
223 | next->link.control ^= cpu_to_le32(TRB_CYCLE); | |
224 | ||
225 | /* Toggle the cycle bit after the last ring segment. */ | |
d0c77d84 | 226 | if (link_trb_toggles_cycle(next)) |
2251198b MN |
227 | ring->cycle_state ^= 1; |
228 | ||
7f84eef0 SS |
229 | ring->enq_seg = ring->enq_seg->next; |
230 | ring->enqueue = ring->enq_seg->trbs; | |
231 | next = ring->enqueue; | |
232 | } | |
233 | } | |
234 | ||
235 | /* | |
085deb16 AX |
236 | * Check to see if there's room to enqueue num_trbs on the ring and make sure |
237 | * enqueue pointer will not advance into dequeue segment. See rules above. | |
7f84eef0 | 238 | */ |
b008df60 | 239 | static inline int room_on_ring(struct xhci_hcd *xhci, struct xhci_ring *ring, |
7f84eef0 SS |
240 | unsigned int num_trbs) |
241 | { | |
085deb16 | 242 | int num_trbs_in_deq_seg; |
b008df60 | 243 | |
085deb16 AX |
244 | if (ring->num_trbs_free < num_trbs) |
245 | return 0; | |
246 | ||
247 | if (ring->type != TYPE_COMMAND && ring->type != TYPE_EVENT) { | |
248 | num_trbs_in_deq_seg = ring->dequeue - ring->deq_seg->trbs; | |
249 | if (ring->num_trbs_free < num_trbs + num_trbs_in_deq_seg) | |
250 | return 0; | |
251 | } | |
252 | ||
253 | return 1; | |
7f84eef0 SS |
254 | } |
255 | ||
7f84eef0 | 256 | /* Ring the host controller doorbell after placing a command on the ring */ |
23e3be11 | 257 | void xhci_ring_cmd_db(struct xhci_hcd *xhci) |
7f84eef0 | 258 | { |
c181bc5b EF |
259 | if (!(xhci->cmd_ring_state & CMD_RING_STATE_RUNNING)) |
260 | return; | |
261 | ||
7f84eef0 | 262 | xhci_dbg(xhci, "// Ding dong!\n"); |
204b7793 | 263 | writel(DB_VALUE_HOST, &xhci->dba->doorbell[0]); |
7f84eef0 | 264 | /* Flush PCI posted writes */ |
b0ba9720 | 265 | readl(&xhci->dba->doorbell[0]); |
7f84eef0 SS |
266 | } |
267 | ||
b92cc66c EF |
268 | static int xhci_abort_cmd_ring(struct xhci_hcd *xhci) |
269 | { | |
270 | u64 temp_64; | |
271 | int ret; | |
272 | ||
273 | xhci_dbg(xhci, "Abort command ring\n"); | |
274 | ||
f7b2e403 | 275 | temp_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); |
b92cc66c | 276 | xhci->cmd_ring_state = CMD_RING_STATE_ABORTED; |
3425aa03 MN |
277 | |
278 | /* | |
279 | * Writing the CMD_RING_ABORT bit should cause a cmd completion event, | |
280 | * however on some host hw the CMD_RING_RUNNING bit is correctly cleared | |
281 | * but the completion event in never sent. Use the cmd timeout timer to | |
282 | * handle those cases. Use twice the time to cover the bit polling retry | |
283 | */ | |
284 | mod_timer(&xhci->cmd_timer, jiffies + (2 * XHCI_CMD_DEFAULT_TIMEOUT)); | |
477632df SS |
285 | xhci_write_64(xhci, temp_64 | CMD_RING_ABORT, |
286 | &xhci->op_regs->cmd_ring); | |
b92cc66c EF |
287 | |
288 | /* Section 4.6.1.2 of xHCI 1.0 spec says software should | |
289 | * time the completion od all xHCI commands, including | |
290 | * the Command Abort operation. If software doesn't see | |
291 | * CRR negated in a timely manner (e.g. longer than 5 | |
292 | * seconds), then it should assume that the there are | |
293 | * larger problems with the xHC and assert HCRST. | |
294 | */ | |
dc0b177c | 295 | ret = xhci_handshake(&xhci->op_regs->cmd_ring, |
b92cc66c EF |
296 | CMD_RING_RUNNING, 0, 5 * 1000 * 1000); |
297 | if (ret < 0) { | |
a6809ffd MN |
298 | /* we are about to kill xhci, give it one more chance */ |
299 | xhci_write_64(xhci, temp_64 | CMD_RING_ABORT, | |
300 | &xhci->op_regs->cmd_ring); | |
301 | udelay(1000); | |
302 | ret = xhci_handshake(&xhci->op_regs->cmd_ring, | |
303 | CMD_RING_RUNNING, 0, 3 * 1000 * 1000); | |
304 | if (ret == 0) | |
305 | return 0; | |
306 | ||
b92cc66c EF |
307 | xhci_err(xhci, "Stopped the command ring failed, " |
308 | "maybe the host is dead\n"); | |
3425aa03 | 309 | del_timer(&xhci->cmd_timer); |
b92cc66c | 310 | xhci->xhc_state |= XHCI_STATE_DYING; |
b92cc66c EF |
311 | xhci_halt(xhci); |
312 | return -ESHUTDOWN; | |
313 | } | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
be88fe4f | 318 | void xhci_ring_ep_doorbell(struct xhci_hcd *xhci, |
ae636747 | 319 | unsigned int slot_id, |
e9df17eb SS |
320 | unsigned int ep_index, |
321 | unsigned int stream_id) | |
ae636747 | 322 | { |
28ccd296 | 323 | __le32 __iomem *db_addr = &xhci->dba->doorbell[slot_id]; |
50d64676 MW |
324 | struct xhci_virt_ep *ep = &xhci->devs[slot_id]->eps[ep_index]; |
325 | unsigned int ep_state = ep->ep_state; | |
ae636747 | 326 | |
ae636747 | 327 | /* Don't ring the doorbell for this endpoint if there are pending |
50d64676 | 328 | * cancellations because we don't want to interrupt processing. |
8df75f42 SS |
329 | * We don't want to restart any stream rings if there's a set dequeue |
330 | * pointer command pending because the device can choose to start any | |
331 | * stream once the endpoint is on the HW schedule. | |
ae636747 | 332 | */ |
50d64676 MW |
333 | if ((ep_state & EP_HALT_PENDING) || (ep_state & SET_DEQ_PENDING) || |
334 | (ep_state & EP_HALTED)) | |
335 | return; | |
204b7793 | 336 | writel(DB_VALUE(ep_index, stream_id), db_addr); |
50d64676 MW |
337 | /* The CPU has better things to do at this point than wait for a |
338 | * write-posting flush. It'll get there soon enough. | |
339 | */ | |
ae636747 SS |
340 | } |
341 | ||
e9df17eb SS |
342 | /* Ring the doorbell for any rings with pending URBs */ |
343 | static void ring_doorbell_for_active_rings(struct xhci_hcd *xhci, | |
344 | unsigned int slot_id, | |
345 | unsigned int ep_index) | |
346 | { | |
347 | unsigned int stream_id; | |
348 | struct xhci_virt_ep *ep; | |
349 | ||
350 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
351 | ||
352 | /* A ring has pending URBs if its TD list is not empty */ | |
353 | if (!(ep->ep_state & EP_HAS_STREAMS)) { | |
d66eaf9f | 354 | if (ep->ring && !(list_empty(&ep->ring->td_list))) |
be88fe4f | 355 | xhci_ring_ep_doorbell(xhci, slot_id, ep_index, 0); |
e9df17eb SS |
356 | return; |
357 | } | |
358 | ||
359 | for (stream_id = 1; stream_id < ep->stream_info->num_streams; | |
360 | stream_id++) { | |
361 | struct xhci_stream_info *stream_info = ep->stream_info; | |
362 | if (!list_empty(&stream_info->stream_rings[stream_id]->td_list)) | |
be88fe4f AX |
363 | xhci_ring_ep_doorbell(xhci, slot_id, ep_index, |
364 | stream_id); | |
e9df17eb SS |
365 | } |
366 | } | |
367 | ||
75b040ec AI |
368 | /* Get the right ring for the given slot_id, ep_index and stream_id. |
369 | * If the endpoint supports streams, boundary check the URB's stream ID. | |
370 | * If the endpoint doesn't support streams, return the singular endpoint ring. | |
371 | */ | |
372 | struct xhci_ring *xhci_triad_to_transfer_ring(struct xhci_hcd *xhci, | |
021bff91 SS |
373 | unsigned int slot_id, unsigned int ep_index, |
374 | unsigned int stream_id) | |
375 | { | |
376 | struct xhci_virt_ep *ep; | |
377 | ||
378 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
379 | /* Common case: no streams */ | |
380 | if (!(ep->ep_state & EP_HAS_STREAMS)) | |
381 | return ep->ring; | |
382 | ||
383 | if (stream_id == 0) { | |
384 | xhci_warn(xhci, | |
385 | "WARN: Slot ID %u, ep index %u has streams, " | |
386 | "but URB has no stream ID.\n", | |
387 | slot_id, ep_index); | |
388 | return NULL; | |
389 | } | |
390 | ||
391 | if (stream_id < ep->stream_info->num_streams) | |
392 | return ep->stream_info->stream_rings[stream_id]; | |
393 | ||
394 | xhci_warn(xhci, | |
395 | "WARN: Slot ID %u, ep index %u has " | |
396 | "stream IDs 1 to %u allocated, " | |
397 | "but stream ID %u is requested.\n", | |
398 | slot_id, ep_index, | |
399 | ep->stream_info->num_streams - 1, | |
400 | stream_id); | |
401 | return NULL; | |
402 | } | |
403 | ||
ae636747 SS |
404 | /* |
405 | * Move the xHC's endpoint ring dequeue pointer past cur_td. | |
406 | * Record the new state of the xHC's endpoint ring dequeue segment, | |
407 | * dequeue pointer, and new consumer cycle state in state. | |
408 | * Update our internal representation of the ring's dequeue pointer. | |
409 | * | |
410 | * We do this in three jumps: | |
411 | * - First we update our new ring state to be the same as when the xHC stopped. | |
412 | * - Then we traverse the ring to find the segment that contains | |
413 | * the last TRB in the TD. We toggle the xHC's new cycle state when we pass | |
414 | * any link TRBs with the toggle cycle bit set. | |
415 | * - Finally we move the dequeue state one TRB further, toggling the cycle bit | |
416 | * if we've moved it past a link TRB with the toggle cycle bit set. | |
28ccd296 ME |
417 | * |
418 | * Some of the uses of xhci_generic_trb are grotty, but if they're done | |
419 | * with correct __le32 accesses they should work fine. Only users of this are | |
420 | * in here. | |
ae636747 | 421 | */ |
c92bcfa7 | 422 | void xhci_find_new_dequeue_state(struct xhci_hcd *xhci, |
ae636747 | 423 | unsigned int slot_id, unsigned int ep_index, |
e9df17eb SS |
424 | unsigned int stream_id, struct xhci_td *cur_td, |
425 | struct xhci_dequeue_state *state) | |
ae636747 SS |
426 | { |
427 | struct xhci_virt_device *dev = xhci->devs[slot_id]; | |
c4bedb77 | 428 | struct xhci_virt_ep *ep = &dev->eps[ep_index]; |
e9df17eb | 429 | struct xhci_ring *ep_ring; |
365038d8 MN |
430 | struct xhci_segment *new_seg; |
431 | union xhci_trb *new_deq; | |
c92bcfa7 | 432 | dma_addr_t addr; |
1f81b6d2 | 433 | u64 hw_dequeue; |
365038d8 MN |
434 | bool cycle_found = false; |
435 | bool td_last_trb_found = false; | |
ae636747 | 436 | |
e9df17eb SS |
437 | ep_ring = xhci_triad_to_transfer_ring(xhci, slot_id, |
438 | ep_index, stream_id); | |
439 | if (!ep_ring) { | |
440 | xhci_warn(xhci, "WARN can't find new dequeue state " | |
441 | "for invalid stream ID %u.\n", | |
442 | stream_id); | |
443 | return; | |
444 | } | |
68e41c5d | 445 | |
ae636747 | 446 | /* Dig out the cycle state saved by the xHC during the stop ep cmd */ |
aa50b290 XR |
447 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
448 | "Finding endpoint context"); | |
c4bedb77 HG |
449 | /* 4.6.9 the css flag is written to the stream context for streams */ |
450 | if (ep->ep_state & EP_HAS_STREAMS) { | |
451 | struct xhci_stream_ctx *ctx = | |
452 | &ep->stream_info->stream_ctx_array[stream_id]; | |
1f81b6d2 | 453 | hw_dequeue = le64_to_cpu(ctx->stream_ring); |
c4bedb77 HG |
454 | } else { |
455 | struct xhci_ep_ctx *ep_ctx | |
456 | = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index); | |
1f81b6d2 | 457 | hw_dequeue = le64_to_cpu(ep_ctx->deq); |
c4bedb77 | 458 | } |
ae636747 | 459 | |
365038d8 MN |
460 | new_seg = ep_ring->deq_seg; |
461 | new_deq = ep_ring->dequeue; | |
462 | state->new_cycle_state = hw_dequeue & 0x1; | |
463 | ||
1f81b6d2 | 464 | /* |
365038d8 MN |
465 | * We want to find the pointer, segment and cycle state of the new trb |
466 | * (the one after current TD's last_trb). We know the cycle state at | |
467 | * hw_dequeue, so walk the ring until both hw_dequeue and last_trb are | |
468 | * found. | |
1f81b6d2 | 469 | */ |
365038d8 MN |
470 | do { |
471 | if (!cycle_found && xhci_trb_virt_to_dma(new_seg, new_deq) | |
472 | == (dma_addr_t)(hw_dequeue & ~0xf)) { | |
473 | cycle_found = true; | |
474 | if (td_last_trb_found) | |
475 | break; | |
476 | } | |
477 | if (new_deq == cur_td->last_trb) | |
478 | td_last_trb_found = true; | |
1f81b6d2 | 479 | |
3495e451 MN |
480 | if (cycle_found && trb_is_link(new_deq) && |
481 | link_trb_toggles_cycle(new_deq)) | |
365038d8 MN |
482 | state->new_cycle_state ^= 0x1; |
483 | ||
484 | next_trb(xhci, ep_ring, &new_seg, &new_deq); | |
485 | ||
486 | /* Search wrapped around, bail out */ | |
487 | if (new_deq == ep->ring->dequeue) { | |
488 | xhci_err(xhci, "Error: Failed finding new dequeue state\n"); | |
489 | state->new_deq_seg = NULL; | |
490 | state->new_deq_ptr = NULL; | |
491 | return; | |
492 | } | |
493 | ||
494 | } while (!cycle_found || !td_last_trb_found); | |
ae636747 | 495 | |
365038d8 MN |
496 | state->new_deq_seg = new_seg; |
497 | state->new_deq_ptr = new_deq; | |
ae636747 | 498 | |
1f81b6d2 | 499 | /* Don't update the ring cycle state for the producer (us). */ |
aa50b290 XR |
500 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
501 | "Cycle state = 0x%x", state->new_cycle_state); | |
01a1fdb9 | 502 | |
aa50b290 XR |
503 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
504 | "New dequeue segment = %p (virtual)", | |
c92bcfa7 SS |
505 | state->new_deq_seg); |
506 | addr = xhci_trb_virt_to_dma(state->new_deq_seg, state->new_deq_ptr); | |
aa50b290 XR |
507 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
508 | "New dequeue pointer = 0x%llx (DMA)", | |
c92bcfa7 | 509 | (unsigned long long) addr); |
ae636747 SS |
510 | } |
511 | ||
522989a2 SS |
512 | /* flip_cycle means flip the cycle bit of all but the first and last TRB. |
513 | * (The last TRB actually points to the ring enqueue pointer, which is not part | |
514 | * of this TD.) This is used to remove partially enqueued isoc TDs from a ring. | |
515 | */ | |
23e3be11 | 516 | static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring, |
0d58a1a0 | 517 | struct xhci_td *td, bool flip_cycle) |
ae636747 | 518 | { |
0d58a1a0 MN |
519 | struct xhci_segment *seg = td->start_seg; |
520 | union xhci_trb *trb = td->first_trb; | |
521 | ||
522 | while (1) { | |
523 | if (trb_is_link(trb)) { | |
524 | /* unchain chained link TRBs */ | |
525 | trb->link.control &= cpu_to_le32(~TRB_CHAIN); | |
ae636747 | 526 | } else { |
0d58a1a0 MN |
527 | trb->generic.field[0] = 0; |
528 | trb->generic.field[1] = 0; | |
529 | trb->generic.field[2] = 0; | |
ae636747 | 530 | /* Preserve only the cycle bit of this TRB */ |
0d58a1a0 MN |
531 | trb->generic.field[3] &= cpu_to_le32(TRB_CYCLE); |
532 | trb->generic.field[3] |= cpu_to_le32( | |
28ccd296 | 533 | TRB_TYPE(TRB_TR_NOOP)); |
ae636747 | 534 | } |
0d58a1a0 MN |
535 | /* flip cycle if asked to */ |
536 | if (flip_cycle && trb != td->first_trb && trb != td->last_trb) | |
537 | trb->generic.field[3] ^= cpu_to_le32(TRB_CYCLE); | |
538 | ||
539 | if (trb == td->last_trb) | |
ae636747 | 540 | break; |
0d58a1a0 MN |
541 | |
542 | next_trb(xhci, ep_ring, &seg, &trb); | |
ae636747 SS |
543 | } |
544 | } | |
545 | ||
575688e1 | 546 | static void xhci_stop_watchdog_timer_in_irq(struct xhci_hcd *xhci, |
6f5165cf SS |
547 | struct xhci_virt_ep *ep) |
548 | { | |
549 | ep->ep_state &= ~EP_HALT_PENDING; | |
550 | /* Can't del_timer_sync in interrupt, so we attempt to cancel. If the | |
551 | * timer is running on another CPU, we don't decrement stop_cmds_pending | |
552 | * (since we didn't successfully stop the watchdog timer). | |
553 | */ | |
554 | if (del_timer(&ep->stop_cmd_timer)) | |
555 | ep->stop_cmds_pending--; | |
556 | } | |
557 | ||
446b3141 | 558 | |
6f5165cf SS |
559 | /* Must be called with xhci->lock held in interrupt context */ |
560 | static void xhci_giveback_urb_in_irq(struct xhci_hcd *xhci, | |
07a37e9e | 561 | struct xhci_td *cur_td, int status) |
6f5165cf | 562 | { |
214f76f7 | 563 | struct usb_hcd *hcd; |
8e51adcc AX |
564 | struct urb *urb; |
565 | struct urb_priv *urb_priv; | |
6f5165cf | 566 | |
8e51adcc AX |
567 | urb = cur_td->urb; |
568 | urb_priv = urb->hcpriv; | |
569 | urb_priv->td_cnt++; | |
214f76f7 | 570 | hcd = bus_to_hcd(urb->dev->bus); |
6f5165cf | 571 | |
8e51adcc AX |
572 | /* Only giveback urb when this is the last td in urb */ |
573 | if (urb_priv->td_cnt == urb_priv->length) { | |
c41136b0 AX |
574 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
575 | xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs--; | |
576 | if (xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs == 0) { | |
577 | if (xhci->quirks & XHCI_AMD_PLL_FIX) | |
578 | usb_amd_quirk_pll_enable(); | |
579 | } | |
580 | } | |
8e51adcc | 581 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
8e51adcc AX |
582 | |
583 | spin_unlock(&xhci->lock); | |
584 | usb_hcd_giveback_urb(hcd, urb, status); | |
4daf9df5 | 585 | xhci_urb_free_priv(urb_priv); |
8e51adcc | 586 | spin_lock(&xhci->lock); |
8e51adcc | 587 | } |
6f5165cf SS |
588 | } |
589 | ||
446b3141 MN |
590 | /* |
591 | * giveback urb, must be called with xhci->lock held. | |
592 | * releases and re-aquires xhci->lock | |
593 | */ | |
594 | static void xhci_giveback_urb_locked(struct xhci_hcd *xhci, struct xhci_td *td, | |
595 | int status) | |
596 | { | |
597 | struct urb *urb = td->urb; | |
598 | struct urb_priv *urb_priv = urb->hcpriv; | |
599 | ||
600 | xhci_urb_free_priv(urb_priv); | |
601 | ||
602 | usb_hcd_unlink_urb_from_ep(bus_to_hcd(urb->dev->bus), urb); | |
603 | if ((urb->actual_length != urb->transfer_buffer_length && | |
604 | (urb->transfer_flags & URB_SHORT_NOT_OK)) || | |
605 | (status != 0 && !usb_endpoint_xfer_isoc(&urb->ep->desc))) | |
606 | xhci_dbg(xhci, "Giveback URB %p, len = %d, expected = %d, status = %d\n", | |
607 | urb, urb->actual_length, | |
608 | urb->transfer_buffer_length, status); | |
609 | spin_unlock(&xhci->lock); | |
610 | /* EHCI, UHCI, and OHCI always unconditionally set the | |
611 | * urb->status of an isochronous endpoint to 0. | |
612 | */ | |
613 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) | |
614 | status = 0; | |
615 | usb_hcd_giveback_urb(bus_to_hcd(urb->dev->bus), urb, status); | |
616 | spin_lock(&xhci->lock); | |
617 | } | |
618 | ||
2d6d5769 WY |
619 | static void xhci_unmap_td_bounce_buffer(struct xhci_hcd *xhci, |
620 | struct xhci_ring *ring, struct xhci_td *td) | |
f9c589e1 MN |
621 | { |
622 | struct device *dev = xhci_to_hcd(xhci)->self.controller; | |
623 | struct xhci_segment *seg = td->bounce_seg; | |
624 | struct urb *urb = td->urb; | |
625 | ||
626 | if (!seg || !urb) | |
627 | return; | |
628 | ||
629 | if (usb_urb_dir_out(urb)) { | |
630 | dma_unmap_single(dev, seg->bounce_dma, ring->bounce_buf_len, | |
631 | DMA_TO_DEVICE); | |
632 | return; | |
633 | } | |
634 | ||
635 | /* for in tranfers we need to copy the data from bounce to sg */ | |
636 | sg_pcopy_from_buffer(urb->sg, urb->num_mapped_sgs, seg->bounce_buf, | |
637 | seg->bounce_len, seg->bounce_offs); | |
638 | dma_unmap_single(dev, seg->bounce_dma, ring->bounce_buf_len, | |
639 | DMA_FROM_DEVICE); | |
640 | seg->bounce_len = 0; | |
641 | seg->bounce_offs = 0; | |
642 | } | |
643 | ||
ae636747 SS |
644 | /* |
645 | * When we get a command completion for a Stop Endpoint Command, we need to | |
646 | * unlink any cancelled TDs from the ring. There are two ways to do that: | |
647 | * | |
648 | * 1. If the HW was in the middle of processing the TD that needs to be | |
649 | * cancelled, then we must move the ring's dequeue pointer past the last TRB | |
650 | * in the TD with a Set Dequeue Pointer Command. | |
651 | * 2. Otherwise, we turn all the TRBs in the TD into No-op TRBs (with the chain | |
652 | * bit cleared) so that the HW will skip over them. | |
653 | */ | |
b8200c94 | 654 | static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id, |
be88fe4f | 655 | union xhci_trb *trb, struct xhci_event_cmd *event) |
ae636747 | 656 | { |
ae636747 SS |
657 | unsigned int ep_index; |
658 | struct xhci_ring *ep_ring; | |
63a0d9ab | 659 | struct xhci_virt_ep *ep; |
ae636747 | 660 | struct list_head *entry; |
326b4810 | 661 | struct xhci_td *cur_td = NULL; |
ae636747 SS |
662 | struct xhci_td *last_unlinked_td; |
663 | ||
c92bcfa7 | 664 | struct xhci_dequeue_state deq_state; |
ae636747 | 665 | |
bc752bde | 666 | if (unlikely(TRB_TO_SUSPEND_PORT(le32_to_cpu(trb->generic.field[3])))) { |
9ea1833e | 667 | if (!xhci->devs[slot_id]) |
be88fe4f AX |
668 | xhci_warn(xhci, "Stop endpoint command " |
669 | "completion for disabled slot %u\n", | |
670 | slot_id); | |
671 | return; | |
672 | } | |
673 | ||
ae636747 | 674 | memset(&deq_state, 0, sizeof(deq_state)); |
28ccd296 | 675 | ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3])); |
63a0d9ab | 676 | ep = &xhci->devs[slot_id]->eps[ep_index]; |
ae636747 | 677 | |
678539cf | 678 | if (list_empty(&ep->cancelled_td_list)) { |
6f5165cf | 679 | xhci_stop_watchdog_timer_in_irq(xhci, ep); |
0714a57c | 680 | ep->stopped_td = NULL; |
e9df17eb | 681 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); |
ae636747 | 682 | return; |
678539cf | 683 | } |
ae636747 SS |
684 | |
685 | /* Fix up the ep ring first, so HW stops executing cancelled TDs. | |
686 | * We have the xHCI lock, so nothing can modify this list until we drop | |
687 | * it. We're also in the event handler, so we can't get re-interrupted | |
688 | * if another Stop Endpoint command completes | |
689 | */ | |
63a0d9ab | 690 | list_for_each(entry, &ep->cancelled_td_list) { |
ae636747 | 691 | cur_td = list_entry(entry, struct xhci_td, cancelled_td_list); |
aa50b290 XR |
692 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
693 | "Removing canceled TD starting at 0x%llx (dma).", | |
79688acf SS |
694 | (unsigned long long)xhci_trb_virt_to_dma( |
695 | cur_td->start_seg, cur_td->first_trb)); | |
e9df17eb SS |
696 | ep_ring = xhci_urb_to_transfer_ring(xhci, cur_td->urb); |
697 | if (!ep_ring) { | |
698 | /* This shouldn't happen unless a driver is mucking | |
699 | * with the stream ID after submission. This will | |
700 | * leave the TD on the hardware ring, and the hardware | |
701 | * will try to execute it, and may access a buffer | |
702 | * that has already been freed. In the best case, the | |
703 | * hardware will execute it, and the event handler will | |
704 | * ignore the completion event for that TD, since it was | |
705 | * removed from the td_list for that endpoint. In | |
706 | * short, don't muck with the stream ID after | |
707 | * submission. | |
708 | */ | |
709 | xhci_warn(xhci, "WARN Cancelled URB %p " | |
710 | "has invalid stream ID %u.\n", | |
711 | cur_td->urb, | |
712 | cur_td->urb->stream_id); | |
713 | goto remove_finished_td; | |
714 | } | |
ae636747 SS |
715 | /* |
716 | * If we stopped on the TD we need to cancel, then we have to | |
717 | * move the xHC endpoint ring dequeue pointer past this TD. | |
718 | */ | |
63a0d9ab | 719 | if (cur_td == ep->stopped_td) |
e9df17eb SS |
720 | xhci_find_new_dequeue_state(xhci, slot_id, ep_index, |
721 | cur_td->urb->stream_id, | |
722 | cur_td, &deq_state); | |
ae636747 | 723 | else |
522989a2 | 724 | td_to_noop(xhci, ep_ring, cur_td, false); |
e9df17eb | 725 | remove_finished_td: |
ae636747 SS |
726 | /* |
727 | * The event handler won't see a completion for this TD anymore, | |
728 | * so remove it from the endpoint ring's TD list. Keep it in | |
729 | * the cancelled TD list for URB completion later. | |
730 | */ | |
585df1d9 | 731 | list_del_init(&cur_td->td_list); |
ae636747 SS |
732 | } |
733 | last_unlinked_td = cur_td; | |
6f5165cf | 734 | xhci_stop_watchdog_timer_in_irq(xhci, ep); |
ae636747 SS |
735 | |
736 | /* If necessary, queue a Set Transfer Ring Dequeue Pointer command */ | |
737 | if (deq_state.new_deq_ptr && deq_state.new_deq_seg) { | |
1e3452e3 HG |
738 | xhci_queue_new_dequeue_state(xhci, slot_id, ep_index, |
739 | ep->stopped_td->urb->stream_id, &deq_state); | |
ac9d8fe7 | 740 | xhci_ring_cmd_db(xhci); |
ae636747 | 741 | } else { |
e9df17eb SS |
742 | /* Otherwise ring the doorbell(s) to restart queued transfers */ |
743 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); | |
ae636747 | 744 | } |
526867c3 | 745 | |
d97b4f8d | 746 | ep->stopped_td = NULL; |
ae636747 SS |
747 | |
748 | /* | |
749 | * Drop the lock and complete the URBs in the cancelled TD list. | |
750 | * New TDs to be cancelled might be added to the end of the list before | |
751 | * we can complete all the URBs for the TDs we already unlinked. | |
752 | * So stop when we've completed the URB for the last TD we unlinked. | |
753 | */ | |
754 | do { | |
63a0d9ab | 755 | cur_td = list_entry(ep->cancelled_td_list.next, |
ae636747 | 756 | struct xhci_td, cancelled_td_list); |
585df1d9 | 757 | list_del_init(&cur_td->cancelled_td_list); |
ae636747 SS |
758 | |
759 | /* Clean up the cancelled URB */ | |
ae636747 SS |
760 | /* Doesn't matter what we pass for status, since the core will |
761 | * just overwrite it (because the URB has been unlinked). | |
762 | */ | |
f76a28a6 | 763 | ep_ring = xhci_urb_to_transfer_ring(xhci, cur_td->urb); |
f9c589e1 MN |
764 | if (ep_ring && cur_td->bounce_seg) |
765 | xhci_unmap_td_bounce_buffer(xhci, ep_ring, cur_td); | |
07a37e9e | 766 | xhci_giveback_urb_in_irq(xhci, cur_td, 0); |
ae636747 | 767 | |
6f5165cf SS |
768 | /* Stop processing the cancelled list if the watchdog timer is |
769 | * running. | |
770 | */ | |
771 | if (xhci->xhc_state & XHCI_STATE_DYING) | |
772 | return; | |
ae636747 SS |
773 | } while (cur_td != last_unlinked_td); |
774 | ||
775 | /* Return to the event handler with xhci->lock re-acquired */ | |
776 | } | |
777 | ||
50e8725e SS |
778 | static void xhci_kill_ring_urbs(struct xhci_hcd *xhci, struct xhci_ring *ring) |
779 | { | |
780 | struct xhci_td *cur_td; | |
781 | ||
782 | while (!list_empty(&ring->td_list)) { | |
783 | cur_td = list_first_entry(&ring->td_list, | |
784 | struct xhci_td, td_list); | |
785 | list_del_init(&cur_td->td_list); | |
786 | if (!list_empty(&cur_td->cancelled_td_list)) | |
787 | list_del_init(&cur_td->cancelled_td_list); | |
f9c589e1 MN |
788 | |
789 | if (cur_td->bounce_seg) | |
790 | xhci_unmap_td_bounce_buffer(xhci, ring, cur_td); | |
50e8725e SS |
791 | xhci_giveback_urb_in_irq(xhci, cur_td, -ESHUTDOWN); |
792 | } | |
793 | } | |
794 | ||
795 | static void xhci_kill_endpoint_urbs(struct xhci_hcd *xhci, | |
796 | int slot_id, int ep_index) | |
797 | { | |
798 | struct xhci_td *cur_td; | |
799 | struct xhci_virt_ep *ep; | |
800 | struct xhci_ring *ring; | |
801 | ||
802 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
21d0e51b SS |
803 | if ((ep->ep_state & EP_HAS_STREAMS) || |
804 | (ep->ep_state & EP_GETTING_NO_STREAMS)) { | |
805 | int stream_id; | |
806 | ||
807 | for (stream_id = 0; stream_id < ep->stream_info->num_streams; | |
808 | stream_id++) { | |
809 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, | |
810 | "Killing URBs for slot ID %u, ep index %u, stream %u", | |
811 | slot_id, ep_index, stream_id + 1); | |
812 | xhci_kill_ring_urbs(xhci, | |
813 | ep->stream_info->stream_rings[stream_id]); | |
814 | } | |
815 | } else { | |
816 | ring = ep->ring; | |
817 | if (!ring) | |
818 | return; | |
819 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, | |
820 | "Killing URBs for slot ID %u, ep index %u", | |
821 | slot_id, ep_index); | |
822 | xhci_kill_ring_urbs(xhci, ring); | |
823 | } | |
50e8725e SS |
824 | while (!list_empty(&ep->cancelled_td_list)) { |
825 | cur_td = list_first_entry(&ep->cancelled_td_list, | |
826 | struct xhci_td, cancelled_td_list); | |
827 | list_del_init(&cur_td->cancelled_td_list); | |
828 | xhci_giveback_urb_in_irq(xhci, cur_td, -ESHUTDOWN); | |
829 | } | |
830 | } | |
831 | ||
6f5165cf SS |
832 | /* Watchdog timer function for when a stop endpoint command fails to complete. |
833 | * In this case, we assume the host controller is broken or dying or dead. The | |
834 | * host may still be completing some other events, so we have to be careful to | |
835 | * let the event ring handler and the URB dequeueing/enqueueing functions know | |
836 | * through xhci->state. | |
837 | * | |
838 | * The timer may also fire if the host takes a very long time to respond to the | |
839 | * command, and the stop endpoint command completion handler cannot delete the | |
840 | * timer before the timer function is called. Another endpoint cancellation may | |
841 | * sneak in before the timer function can grab the lock, and that may queue | |
842 | * another stop endpoint command and add the timer back. So we cannot use a | |
843 | * simple flag to say whether there is a pending stop endpoint command for a | |
844 | * particular endpoint. | |
845 | * | |
846 | * Instead we use a combination of that flag and a counter for the number of | |
847 | * pending stop endpoint commands. If the timer is the tail end of the last | |
848 | * stop endpoint command, and the endpoint's command is still pending, we assume | |
849 | * the host is dying. | |
850 | */ | |
851 | void xhci_stop_endpoint_command_watchdog(unsigned long arg) | |
852 | { | |
853 | struct xhci_hcd *xhci; | |
854 | struct xhci_virt_ep *ep; | |
6f5165cf | 855 | int ret, i, j; |
f43d6231 | 856 | unsigned long flags; |
6f5165cf SS |
857 | |
858 | ep = (struct xhci_virt_ep *) arg; | |
859 | xhci = ep->xhci; | |
860 | ||
f43d6231 | 861 | spin_lock_irqsave(&xhci->lock, flags); |
6f5165cf SS |
862 | |
863 | ep->stop_cmds_pending--; | |
bcf42aa6 MN |
864 | if (xhci->xhc_state & XHCI_STATE_REMOVING) { |
865 | spin_unlock_irqrestore(&xhci->lock, flags); | |
866 | return; | |
867 | } | |
6f5165cf | 868 | if (xhci->xhc_state & XHCI_STATE_DYING) { |
aa50b290 XR |
869 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
870 | "Stop EP timer ran, but another timer marked " | |
871 | "xHCI as DYING, exiting."); | |
f43d6231 | 872 | spin_unlock_irqrestore(&xhci->lock, flags); |
6f5165cf SS |
873 | return; |
874 | } | |
875 | if (!(ep->stop_cmds_pending == 0 && (ep->ep_state & EP_HALT_PENDING))) { | |
aa50b290 XR |
876 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
877 | "Stop EP timer ran, but no command pending, " | |
878 | "exiting."); | |
f43d6231 | 879 | spin_unlock_irqrestore(&xhci->lock, flags); |
6f5165cf SS |
880 | return; |
881 | } | |
882 | ||
883 | xhci_warn(xhci, "xHCI host not responding to stop endpoint command.\n"); | |
884 | xhci_warn(xhci, "Assuming host is dying, halting host.\n"); | |
885 | /* Oops, HC is dead or dying or at least not responding to the stop | |
886 | * endpoint command. | |
887 | */ | |
888 | xhci->xhc_state |= XHCI_STATE_DYING; | |
889 | /* Disable interrupts from the host controller and start halting it */ | |
890 | xhci_quiesce(xhci); | |
f43d6231 | 891 | spin_unlock_irqrestore(&xhci->lock, flags); |
6f5165cf SS |
892 | |
893 | ret = xhci_halt(xhci); | |
894 | ||
f43d6231 | 895 | spin_lock_irqsave(&xhci->lock, flags); |
6f5165cf SS |
896 | if (ret < 0) { |
897 | /* This is bad; the host is not responding to commands and it's | |
898 | * not allowing itself to be halted. At least interrupts are | |
ac04e6ff | 899 | * disabled. If we call usb_hc_died(), it will attempt to |
6f5165cf SS |
900 | * disconnect all device drivers under this host. Those |
901 | * disconnect() methods will wait for all URBs to be unlinked, | |
902 | * so we must complete them. | |
903 | */ | |
904 | xhci_warn(xhci, "Non-responsive xHCI host is not halting.\n"); | |
905 | xhci_warn(xhci, "Completing active URBs anyway.\n"); | |
906 | /* We could turn all TDs on the rings to no-ops. This won't | |
907 | * help if the host has cached part of the ring, and is slow if | |
908 | * we want to preserve the cycle bit. Skip it and hope the host | |
909 | * doesn't touch the memory. | |
910 | */ | |
911 | } | |
912 | for (i = 0; i < MAX_HC_SLOTS; i++) { | |
913 | if (!xhci->devs[i]) | |
914 | continue; | |
50e8725e SS |
915 | for (j = 0; j < 31; j++) |
916 | xhci_kill_endpoint_urbs(xhci, i, j); | |
6f5165cf | 917 | } |
f43d6231 | 918 | spin_unlock_irqrestore(&xhci->lock, flags); |
aa50b290 XR |
919 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
920 | "Calling usb_hc_died()"); | |
bcf42aa6 | 921 | usb_hc_died(xhci_to_hcd(xhci)); |
aa50b290 XR |
922 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
923 | "xHCI host controller is dead."); | |
6f5165cf SS |
924 | } |
925 | ||
b008df60 AX |
926 | |
927 | static void update_ring_for_set_deq_completion(struct xhci_hcd *xhci, | |
928 | struct xhci_virt_device *dev, | |
929 | struct xhci_ring *ep_ring, | |
930 | unsigned int ep_index) | |
931 | { | |
932 | union xhci_trb *dequeue_temp; | |
933 | int num_trbs_free_temp; | |
934 | bool revert = false; | |
935 | ||
936 | num_trbs_free_temp = ep_ring->num_trbs_free; | |
937 | dequeue_temp = ep_ring->dequeue; | |
938 | ||
0d9f78a9 SS |
939 | /* If we get two back-to-back stalls, and the first stalled transfer |
940 | * ends just before a link TRB, the dequeue pointer will be left on | |
941 | * the link TRB by the code in the while loop. So we have to update | |
942 | * the dequeue pointer one segment further, or we'll jump off | |
943 | * the segment into la-la-land. | |
944 | */ | |
2d98ef40 | 945 | if (trb_is_link(ep_ring->dequeue)) { |
0d9f78a9 SS |
946 | ep_ring->deq_seg = ep_ring->deq_seg->next; |
947 | ep_ring->dequeue = ep_ring->deq_seg->trbs; | |
948 | } | |
949 | ||
b008df60 AX |
950 | while (ep_ring->dequeue != dev->eps[ep_index].queued_deq_ptr) { |
951 | /* We have more usable TRBs */ | |
952 | ep_ring->num_trbs_free++; | |
953 | ep_ring->dequeue++; | |
2d98ef40 | 954 | if (trb_is_link(ep_ring->dequeue)) { |
b008df60 AX |
955 | if (ep_ring->dequeue == |
956 | dev->eps[ep_index].queued_deq_ptr) | |
957 | break; | |
958 | ep_ring->deq_seg = ep_ring->deq_seg->next; | |
959 | ep_ring->dequeue = ep_ring->deq_seg->trbs; | |
960 | } | |
961 | if (ep_ring->dequeue == dequeue_temp) { | |
962 | revert = true; | |
963 | break; | |
964 | } | |
965 | } | |
966 | ||
967 | if (revert) { | |
968 | xhci_dbg(xhci, "Unable to find new dequeue pointer\n"); | |
969 | ep_ring->num_trbs_free = num_trbs_free_temp; | |
970 | } | |
971 | } | |
972 | ||
ae636747 SS |
973 | /* |
974 | * When we get a completion for a Set Transfer Ring Dequeue Pointer command, | |
975 | * we need to clear the set deq pending flag in the endpoint ring state, so that | |
976 | * the TD queueing code can ring the doorbell again. We also need to ring the | |
977 | * endpoint doorbell to restart the ring, but only if there aren't more | |
978 | * cancellations pending. | |
979 | */ | |
b8200c94 | 980 | static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id, |
c69a0597 | 981 | union xhci_trb *trb, u32 cmd_comp_code) |
ae636747 | 982 | { |
ae636747 | 983 | unsigned int ep_index; |
e9df17eb | 984 | unsigned int stream_id; |
ae636747 SS |
985 | struct xhci_ring *ep_ring; |
986 | struct xhci_virt_device *dev; | |
9aad95e2 | 987 | struct xhci_virt_ep *ep; |
d115b048 JY |
988 | struct xhci_ep_ctx *ep_ctx; |
989 | struct xhci_slot_ctx *slot_ctx; | |
ae636747 | 990 | |
28ccd296 ME |
991 | ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3])); |
992 | stream_id = TRB_TO_STREAM_ID(le32_to_cpu(trb->generic.field[2])); | |
ae636747 | 993 | dev = xhci->devs[slot_id]; |
9aad95e2 | 994 | ep = &dev->eps[ep_index]; |
e9df17eb SS |
995 | |
996 | ep_ring = xhci_stream_id_to_ring(dev, ep_index, stream_id); | |
997 | if (!ep_ring) { | |
e587b8b2 | 998 | xhci_warn(xhci, "WARN Set TR deq ptr command for freed stream ID %u\n", |
e9df17eb SS |
999 | stream_id); |
1000 | /* XXX: Harmless??? */ | |
0d4976ec | 1001 | goto cleanup; |
e9df17eb SS |
1002 | } |
1003 | ||
d115b048 JY |
1004 | ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index); |
1005 | slot_ctx = xhci_get_slot_ctx(xhci, dev->out_ctx); | |
ae636747 | 1006 | |
c69a0597 | 1007 | if (cmd_comp_code != COMP_SUCCESS) { |
ae636747 SS |
1008 | unsigned int ep_state; |
1009 | unsigned int slot_state; | |
1010 | ||
c69a0597 | 1011 | switch (cmd_comp_code) { |
ae636747 | 1012 | case COMP_TRB_ERR: |
e587b8b2 | 1013 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd invalid because of stream ID configuration\n"); |
ae636747 SS |
1014 | break; |
1015 | case COMP_CTX_STATE: | |
e587b8b2 | 1016 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state.\n"); |
28ccd296 | 1017 | ep_state = le32_to_cpu(ep_ctx->ep_info); |
ae636747 | 1018 | ep_state &= EP_STATE_MASK; |
28ccd296 | 1019 | slot_state = le32_to_cpu(slot_ctx->dev_state); |
ae636747 | 1020 | slot_state = GET_SLOT_STATE(slot_state); |
aa50b290 XR |
1021 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
1022 | "Slot state = %u, EP state = %u", | |
ae636747 SS |
1023 | slot_state, ep_state); |
1024 | break; | |
1025 | case COMP_EBADSLT: | |
e587b8b2 ON |
1026 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd failed because slot %u was not enabled.\n", |
1027 | slot_id); | |
ae636747 SS |
1028 | break; |
1029 | default: | |
e587b8b2 ON |
1030 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd with unknown completion code of %u.\n", |
1031 | cmd_comp_code); | |
ae636747 SS |
1032 | break; |
1033 | } | |
1034 | /* OK what do we do now? The endpoint state is hosed, and we | |
1035 | * should never get to this point if the synchronization between | |
1036 | * queueing, and endpoint state are correct. This might happen | |
1037 | * if the device gets disconnected after we've finished | |
1038 | * cancelling URBs, which might not be an error... | |
1039 | */ | |
1040 | } else { | |
9aad95e2 HG |
1041 | u64 deq; |
1042 | /* 4.6.10 deq ptr is written to the stream ctx for streams */ | |
1043 | if (ep->ep_state & EP_HAS_STREAMS) { | |
1044 | struct xhci_stream_ctx *ctx = | |
1045 | &ep->stream_info->stream_ctx_array[stream_id]; | |
1046 | deq = le64_to_cpu(ctx->stream_ring) & SCTX_DEQ_MASK; | |
1047 | } else { | |
1048 | deq = le64_to_cpu(ep_ctx->deq) & ~EP_CTX_CYCLE_MASK; | |
1049 | } | |
aa50b290 | 1050 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
9aad95e2 HG |
1051 | "Successful Set TR Deq Ptr cmd, deq = @%08llx", deq); |
1052 | if (xhci_trb_virt_to_dma(ep->queued_deq_seg, | |
1053 | ep->queued_deq_ptr) == deq) { | |
bf161e85 SS |
1054 | /* Update the ring's dequeue segment and dequeue pointer |
1055 | * to reflect the new position. | |
1056 | */ | |
b008df60 AX |
1057 | update_ring_for_set_deq_completion(xhci, dev, |
1058 | ep_ring, ep_index); | |
bf161e85 | 1059 | } else { |
e587b8b2 | 1060 | xhci_warn(xhci, "Mismatch between completed Set TR Deq Ptr command & xHCI internal state.\n"); |
bf161e85 | 1061 | xhci_warn(xhci, "ep deq seg = %p, deq ptr = %p\n", |
9aad95e2 | 1062 | ep->queued_deq_seg, ep->queued_deq_ptr); |
bf161e85 | 1063 | } |
ae636747 SS |
1064 | } |
1065 | ||
0d4976ec | 1066 | cleanup: |
63a0d9ab | 1067 | dev->eps[ep_index].ep_state &= ~SET_DEQ_PENDING; |
bf161e85 SS |
1068 | dev->eps[ep_index].queued_deq_seg = NULL; |
1069 | dev->eps[ep_index].queued_deq_ptr = NULL; | |
e9df17eb SS |
1070 | /* Restart any rings with pending URBs */ |
1071 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); | |
ae636747 SS |
1072 | } |
1073 | ||
b8200c94 | 1074 | static void xhci_handle_cmd_reset_ep(struct xhci_hcd *xhci, int slot_id, |
c69a0597 | 1075 | union xhci_trb *trb, u32 cmd_comp_code) |
a1587d97 | 1076 | { |
a1587d97 SS |
1077 | unsigned int ep_index; |
1078 | ||
28ccd296 | 1079 | ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3])); |
a1587d97 SS |
1080 | /* This command will only fail if the endpoint wasn't halted, |
1081 | * but we don't care. | |
1082 | */ | |
a0254324 | 1083 | xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep, |
c69a0597 | 1084 | "Ignoring reset ep completion code of %u", cmd_comp_code); |
a1587d97 | 1085 | |
ac9d8fe7 SS |
1086 | /* HW with the reset endpoint quirk needs to have a configure endpoint |
1087 | * command complete before the endpoint can be used. Queue that here | |
1088 | * because the HW can't handle two commands being queued in a row. | |
1089 | */ | |
1090 | if (xhci->quirks & XHCI_RESET_EP_QUIRK) { | |
ddba5cd0 MN |
1091 | struct xhci_command *command; |
1092 | command = xhci_alloc_command(xhci, false, false, GFP_ATOMIC); | |
a0ee619f HG |
1093 | if (!command) { |
1094 | xhci_warn(xhci, "WARN Cannot submit cfg ep: ENOMEM\n"); | |
1095 | return; | |
1096 | } | |
4bdfe4c3 XR |
1097 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
1098 | "Queueing configure endpoint command"); | |
ddba5cd0 | 1099 | xhci_queue_configure_endpoint(xhci, command, |
913a8a34 SS |
1100 | xhci->devs[slot_id]->in_ctx->dma, slot_id, |
1101 | false); | |
ac9d8fe7 SS |
1102 | xhci_ring_cmd_db(xhci); |
1103 | } else { | |
c3492dbf | 1104 | /* Clear our internal halted state */ |
63a0d9ab | 1105 | xhci->devs[slot_id]->eps[ep_index].ep_state &= ~EP_HALTED; |
ac9d8fe7 | 1106 | } |
a1587d97 | 1107 | } |
ae636747 | 1108 | |
b244b431 XR |
1109 | static void xhci_handle_cmd_enable_slot(struct xhci_hcd *xhci, int slot_id, |
1110 | u32 cmd_comp_code) | |
1111 | { | |
1112 | if (cmd_comp_code == COMP_SUCCESS) | |
1113 | xhci->slot_id = slot_id; | |
1114 | else | |
1115 | xhci->slot_id = 0; | |
b244b431 XR |
1116 | } |
1117 | ||
6c02dd14 XR |
1118 | static void xhci_handle_cmd_disable_slot(struct xhci_hcd *xhci, int slot_id) |
1119 | { | |
1120 | struct xhci_virt_device *virt_dev; | |
1121 | ||
1122 | virt_dev = xhci->devs[slot_id]; | |
1123 | if (!virt_dev) | |
1124 | return; | |
1125 | if (xhci->quirks & XHCI_EP_LIMIT_QUIRK) | |
1126 | /* Delete default control endpoint resources */ | |
1127 | xhci_free_device_endpoint_resources(xhci, virt_dev, true); | |
1128 | xhci_free_virt_device(xhci, slot_id); | |
1129 | } | |
1130 | ||
6ed46d33 XR |
1131 | static void xhci_handle_cmd_config_ep(struct xhci_hcd *xhci, int slot_id, |
1132 | struct xhci_event_cmd *event, u32 cmd_comp_code) | |
1133 | { | |
1134 | struct xhci_virt_device *virt_dev; | |
1135 | struct xhci_input_control_ctx *ctrl_ctx; | |
1136 | unsigned int ep_index; | |
1137 | unsigned int ep_state; | |
1138 | u32 add_flags, drop_flags; | |
1139 | ||
6ed46d33 XR |
1140 | /* |
1141 | * Configure endpoint commands can come from the USB core | |
1142 | * configuration or alt setting changes, or because the HW | |
1143 | * needed an extra configure endpoint command after a reset | |
1144 | * endpoint command or streams were being configured. | |
1145 | * If the command was for a halted endpoint, the xHCI driver | |
1146 | * is not waiting on the configure endpoint command. | |
1147 | */ | |
9ea1833e | 1148 | virt_dev = xhci->devs[slot_id]; |
4daf9df5 | 1149 | ctrl_ctx = xhci_get_input_control_ctx(virt_dev->in_ctx); |
6ed46d33 XR |
1150 | if (!ctrl_ctx) { |
1151 | xhci_warn(xhci, "Could not get input context, bad type.\n"); | |
1152 | return; | |
1153 | } | |
1154 | ||
1155 | add_flags = le32_to_cpu(ctrl_ctx->add_flags); | |
1156 | drop_flags = le32_to_cpu(ctrl_ctx->drop_flags); | |
1157 | /* Input ctx add_flags are the endpoint index plus one */ | |
1158 | ep_index = xhci_last_valid_endpoint(add_flags) - 1; | |
1159 | ||
1160 | /* A usb_set_interface() call directly after clearing a halted | |
1161 | * condition may race on this quirky hardware. Not worth | |
1162 | * worrying about, since this is prototype hardware. Not sure | |
1163 | * if this will work for streams, but streams support was | |
1164 | * untested on this prototype. | |
1165 | */ | |
1166 | if (xhci->quirks & XHCI_RESET_EP_QUIRK && | |
1167 | ep_index != (unsigned int) -1 && | |
1168 | add_flags - SLOT_FLAG == drop_flags) { | |
1169 | ep_state = virt_dev->eps[ep_index].ep_state; | |
1170 | if (!(ep_state & EP_HALTED)) | |
ddba5cd0 | 1171 | return; |
6ed46d33 XR |
1172 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
1173 | "Completed config ep cmd - " | |
1174 | "last ep index = %d, state = %d", | |
1175 | ep_index, ep_state); | |
1176 | /* Clear internal halted state and restart ring(s) */ | |
1177 | virt_dev->eps[ep_index].ep_state &= ~EP_HALTED; | |
1178 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); | |
1179 | return; | |
1180 | } | |
6ed46d33 XR |
1181 | return; |
1182 | } | |
1183 | ||
f681321b XR |
1184 | static void xhci_handle_cmd_reset_dev(struct xhci_hcd *xhci, int slot_id, |
1185 | struct xhci_event_cmd *event) | |
1186 | { | |
f681321b | 1187 | xhci_dbg(xhci, "Completed reset device command.\n"); |
9ea1833e | 1188 | if (!xhci->devs[slot_id]) |
f681321b XR |
1189 | xhci_warn(xhci, "Reset device command completion " |
1190 | "for disabled slot %u\n", slot_id); | |
1191 | } | |
1192 | ||
2c070821 XR |
1193 | static void xhci_handle_cmd_nec_get_fw(struct xhci_hcd *xhci, |
1194 | struct xhci_event_cmd *event) | |
1195 | { | |
1196 | if (!(xhci->quirks & XHCI_NEC_HOST)) { | |
1197 | xhci->error_bitmask |= 1 << 6; | |
1198 | return; | |
1199 | } | |
1200 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, | |
1201 | "NEC firmware version %2x.%02x", | |
1202 | NEC_FW_MAJOR(le32_to_cpu(event->status)), | |
1203 | NEC_FW_MINOR(le32_to_cpu(event->status))); | |
1204 | } | |
1205 | ||
9ea1833e | 1206 | static void xhci_complete_del_and_free_cmd(struct xhci_command *cmd, u32 status) |
c9aa1a2d MN |
1207 | { |
1208 | list_del(&cmd->cmd_list); | |
9ea1833e MN |
1209 | |
1210 | if (cmd->completion) { | |
1211 | cmd->status = status; | |
1212 | complete(cmd->completion); | |
1213 | } else { | |
c9aa1a2d | 1214 | kfree(cmd); |
9ea1833e | 1215 | } |
c9aa1a2d MN |
1216 | } |
1217 | ||
1218 | void xhci_cleanup_command_queue(struct xhci_hcd *xhci) | |
1219 | { | |
1220 | struct xhci_command *cur_cmd, *tmp_cmd; | |
1221 | list_for_each_entry_safe(cur_cmd, tmp_cmd, &xhci->cmd_list, cmd_list) | |
9ea1833e | 1222 | xhci_complete_del_and_free_cmd(cur_cmd, COMP_CMD_ABORT); |
c9aa1a2d MN |
1223 | } |
1224 | ||
c311e391 MN |
1225 | /* |
1226 | * Turn all commands on command ring with status set to "aborted" to no-op trbs. | |
1227 | * If there are other commands waiting then restart the ring and kick the timer. | |
1228 | * This must be called with command ring stopped and xhci->lock held. | |
1229 | */ | |
1230 | static void xhci_handle_stopped_cmd_ring(struct xhci_hcd *xhci, | |
1231 | struct xhci_command *cur_cmd) | |
1232 | { | |
1233 | struct xhci_command *i_cmd, *tmp_cmd; | |
1234 | u32 cycle_state; | |
1235 | ||
1236 | /* Turn all aborted commands in list to no-ops, then restart */ | |
1237 | list_for_each_entry_safe(i_cmd, tmp_cmd, &xhci->cmd_list, | |
1238 | cmd_list) { | |
1239 | ||
1240 | if (i_cmd->status != COMP_CMD_ABORT) | |
1241 | continue; | |
1242 | ||
1243 | i_cmd->status = COMP_CMD_STOP; | |
1244 | ||
1245 | xhci_dbg(xhci, "Turn aborted command %p to no-op\n", | |
1246 | i_cmd->command_trb); | |
1247 | /* get cycle state from the original cmd trb */ | |
1248 | cycle_state = le32_to_cpu( | |
1249 | i_cmd->command_trb->generic.field[3]) & TRB_CYCLE; | |
1250 | /* modify the command trb to no-op command */ | |
1251 | i_cmd->command_trb->generic.field[0] = 0; | |
1252 | i_cmd->command_trb->generic.field[1] = 0; | |
1253 | i_cmd->command_trb->generic.field[2] = 0; | |
1254 | i_cmd->command_trb->generic.field[3] = cpu_to_le32( | |
1255 | TRB_TYPE(TRB_CMD_NOOP) | cycle_state); | |
1256 | ||
1257 | /* | |
1258 | * caller waiting for completion is called when command | |
1259 | * completion event is received for these no-op commands | |
1260 | */ | |
1261 | } | |
1262 | ||
1263 | xhci->cmd_ring_state = CMD_RING_STATE_RUNNING; | |
1264 | ||
1265 | /* ring command ring doorbell to restart the command ring */ | |
1266 | if ((xhci->cmd_ring->dequeue != xhci->cmd_ring->enqueue) && | |
1267 | !(xhci->xhc_state & XHCI_STATE_DYING)) { | |
1268 | xhci->current_cmd = cur_cmd; | |
1269 | mod_timer(&xhci->cmd_timer, jiffies + XHCI_CMD_DEFAULT_TIMEOUT); | |
1270 | xhci_ring_cmd_db(xhci); | |
1271 | } | |
1272 | return; | |
1273 | } | |
1274 | ||
1275 | ||
1276 | void xhci_handle_command_timeout(unsigned long data) | |
1277 | { | |
1278 | struct xhci_hcd *xhci; | |
1279 | int ret; | |
1280 | unsigned long flags; | |
1281 | u64 hw_ring_state; | |
3425aa03 | 1282 | bool second_timeout = false; |
c311e391 MN |
1283 | xhci = (struct xhci_hcd *) data; |
1284 | ||
1285 | /* mark this command to be cancelled */ | |
1286 | spin_lock_irqsave(&xhci->lock, flags); | |
1287 | if (xhci->current_cmd) { | |
3425aa03 MN |
1288 | if (xhci->current_cmd->status == COMP_CMD_ABORT) |
1289 | second_timeout = true; | |
1290 | xhci->current_cmd->status = COMP_CMD_ABORT; | |
c311e391 MN |
1291 | } |
1292 | ||
c311e391 MN |
1293 | /* Make sure command ring is running before aborting it */ |
1294 | hw_ring_state = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); | |
1295 | if ((xhci->cmd_ring_state & CMD_RING_STATE_RUNNING) && | |
1296 | (hw_ring_state & CMD_RING_RUNNING)) { | |
c311e391 MN |
1297 | spin_unlock_irqrestore(&xhci->lock, flags); |
1298 | xhci_dbg(xhci, "Command timeout\n"); | |
1299 | ret = xhci_abort_cmd_ring(xhci); | |
1300 | if (unlikely(ret == -ESHUTDOWN)) { | |
1301 | xhci_err(xhci, "Abort command ring failed\n"); | |
1302 | xhci_cleanup_command_queue(xhci); | |
1303 | usb_hc_died(xhci_to_hcd(xhci)->primary_hcd); | |
1304 | xhci_dbg(xhci, "xHCI host controller is dead.\n"); | |
1305 | } | |
1306 | return; | |
1307 | } | |
3425aa03 MN |
1308 | |
1309 | /* command ring failed to restart, or host removed. Bail out */ | |
1310 | if (second_timeout || xhci->xhc_state & XHCI_STATE_REMOVING) { | |
1311 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1312 | xhci_dbg(xhci, "command timed out twice, ring start fail?\n"); | |
1313 | xhci_cleanup_command_queue(xhci); | |
1314 | return; | |
1315 | } | |
1316 | ||
c311e391 MN |
1317 | /* command timeout on stopped ring, ring can't be aborted */ |
1318 | xhci_dbg(xhci, "Command timeout on stopped ring\n"); | |
1319 | xhci_handle_stopped_cmd_ring(xhci, xhci->current_cmd); | |
1320 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1321 | return; | |
1322 | } | |
1323 | ||
7f84eef0 SS |
1324 | static void handle_cmd_completion(struct xhci_hcd *xhci, |
1325 | struct xhci_event_cmd *event) | |
1326 | { | |
28ccd296 | 1327 | int slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
7f84eef0 SS |
1328 | u64 cmd_dma; |
1329 | dma_addr_t cmd_dequeue_dma; | |
e7a79a1d | 1330 | u32 cmd_comp_code; |
9124b121 | 1331 | union xhci_trb *cmd_trb; |
c9aa1a2d | 1332 | struct xhci_command *cmd; |
b54fc46d | 1333 | u32 cmd_type; |
7f84eef0 | 1334 | |
28ccd296 | 1335 | cmd_dma = le64_to_cpu(event->cmd_trb); |
9124b121 | 1336 | cmd_trb = xhci->cmd_ring->dequeue; |
23e3be11 | 1337 | cmd_dequeue_dma = xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg, |
9124b121 | 1338 | cmd_trb); |
7f84eef0 SS |
1339 | /* Is the command ring deq ptr out of sync with the deq seg ptr? */ |
1340 | if (cmd_dequeue_dma == 0) { | |
1341 | xhci->error_bitmask |= 1 << 4; | |
1342 | return; | |
1343 | } | |
1344 | /* Does the DMA address match our internal dequeue pointer address? */ | |
1345 | if (cmd_dma != (u64) cmd_dequeue_dma) { | |
1346 | xhci->error_bitmask |= 1 << 5; | |
1347 | return; | |
1348 | } | |
b63f4053 | 1349 | |
c9aa1a2d MN |
1350 | cmd = list_entry(xhci->cmd_list.next, struct xhci_command, cmd_list); |
1351 | ||
c311e391 MN |
1352 | del_timer(&xhci->cmd_timer); |
1353 | ||
9124b121 | 1354 | trace_xhci_cmd_completion(cmd_trb, (struct xhci_generic_trb *) event); |
63a23b9a | 1355 | |
e7a79a1d | 1356 | cmd_comp_code = GET_COMP_CODE(le32_to_cpu(event->status)); |
c311e391 MN |
1357 | |
1358 | /* If CMD ring stopped we own the trbs between enqueue and dequeue */ | |
1359 | if (cmd_comp_code == COMP_CMD_STOP) { | |
1360 | xhci_handle_stopped_cmd_ring(xhci, cmd); | |
1361 | return; | |
1362 | } | |
33be1265 MN |
1363 | |
1364 | if (cmd->command_trb != xhci->cmd_ring->dequeue) { | |
1365 | xhci_err(xhci, | |
1366 | "Command completion event does not match command\n"); | |
1367 | return; | |
1368 | } | |
1369 | ||
c311e391 MN |
1370 | /* |
1371 | * Host aborted the command ring, check if the current command was | |
1372 | * supposed to be aborted, otherwise continue normally. | |
1373 | * The command ring is stopped now, but the xHC will issue a Command | |
1374 | * Ring Stopped event which will cause us to restart it. | |
1375 | */ | |
1376 | if (cmd_comp_code == COMP_CMD_ABORT) { | |
1377 | xhci->cmd_ring_state = CMD_RING_STATE_STOPPED; | |
1378 | if (cmd->status == COMP_CMD_ABORT) | |
1379 | goto event_handled; | |
b63f4053 EF |
1380 | } |
1381 | ||
b54fc46d XR |
1382 | cmd_type = TRB_FIELD_TO_TYPE(le32_to_cpu(cmd_trb->generic.field[3])); |
1383 | switch (cmd_type) { | |
1384 | case TRB_ENABLE_SLOT: | |
e7a79a1d | 1385 | xhci_handle_cmd_enable_slot(xhci, slot_id, cmd_comp_code); |
3ffbba95 | 1386 | break; |
b54fc46d | 1387 | case TRB_DISABLE_SLOT: |
6c02dd14 | 1388 | xhci_handle_cmd_disable_slot(xhci, slot_id); |
3ffbba95 | 1389 | break; |
b54fc46d | 1390 | case TRB_CONFIG_EP: |
9ea1833e MN |
1391 | if (!cmd->completion) |
1392 | xhci_handle_cmd_config_ep(xhci, slot_id, event, | |
1393 | cmd_comp_code); | |
f94e0186 | 1394 | break; |
b54fc46d | 1395 | case TRB_EVAL_CONTEXT: |
2d3f1fac | 1396 | break; |
b54fc46d | 1397 | case TRB_ADDR_DEV: |
3ffbba95 | 1398 | break; |
b54fc46d | 1399 | case TRB_STOP_RING: |
b8200c94 XR |
1400 | WARN_ON(slot_id != TRB_TO_SLOT_ID( |
1401 | le32_to_cpu(cmd_trb->generic.field[3]))); | |
1402 | xhci_handle_cmd_stop_ep(xhci, slot_id, cmd_trb, event); | |
ae636747 | 1403 | break; |
b54fc46d | 1404 | case TRB_SET_DEQ: |
b8200c94 XR |
1405 | WARN_ON(slot_id != TRB_TO_SLOT_ID( |
1406 | le32_to_cpu(cmd_trb->generic.field[3]))); | |
c69a0597 | 1407 | xhci_handle_cmd_set_deq(xhci, slot_id, cmd_trb, cmd_comp_code); |
ae636747 | 1408 | break; |
b54fc46d | 1409 | case TRB_CMD_NOOP: |
c311e391 MN |
1410 | /* Is this an aborted command turned to NO-OP? */ |
1411 | if (cmd->status == COMP_CMD_STOP) | |
1412 | cmd_comp_code = COMP_CMD_STOP; | |
7f84eef0 | 1413 | break; |
b54fc46d | 1414 | case TRB_RESET_EP: |
b8200c94 XR |
1415 | WARN_ON(slot_id != TRB_TO_SLOT_ID( |
1416 | le32_to_cpu(cmd_trb->generic.field[3]))); | |
c69a0597 | 1417 | xhci_handle_cmd_reset_ep(xhci, slot_id, cmd_trb, cmd_comp_code); |
a1587d97 | 1418 | break; |
b54fc46d | 1419 | case TRB_RESET_DEV: |
6fcfb0d6 MN |
1420 | /* SLOT_ID field in reset device cmd completion event TRB is 0. |
1421 | * Use the SLOT_ID from the command TRB instead (xhci 4.6.11) | |
1422 | */ | |
1423 | slot_id = TRB_TO_SLOT_ID( | |
1424 | le32_to_cpu(cmd_trb->generic.field[3])); | |
f681321b | 1425 | xhci_handle_cmd_reset_dev(xhci, slot_id, event); |
2a8f82c4 | 1426 | break; |
b54fc46d | 1427 | case TRB_NEC_GET_FW: |
2c070821 | 1428 | xhci_handle_cmd_nec_get_fw(xhci, event); |
0238634d | 1429 | break; |
7f84eef0 SS |
1430 | default: |
1431 | /* Skip over unknown commands on the event ring */ | |
1432 | xhci->error_bitmask |= 1 << 6; | |
1433 | break; | |
1434 | } | |
c9aa1a2d | 1435 | |
c311e391 MN |
1436 | /* restart timer if this wasn't the last command */ |
1437 | if (cmd->cmd_list.next != &xhci->cmd_list) { | |
1438 | xhci->current_cmd = list_entry(cmd->cmd_list.next, | |
1439 | struct xhci_command, cmd_list); | |
1440 | mod_timer(&xhci->cmd_timer, jiffies + XHCI_CMD_DEFAULT_TIMEOUT); | |
1441 | } | |
1442 | ||
1443 | event_handled: | |
9ea1833e | 1444 | xhci_complete_del_and_free_cmd(cmd, cmd_comp_code); |
c9aa1a2d | 1445 | |
3b72fca0 | 1446 | inc_deq(xhci, xhci->cmd_ring); |
7f84eef0 SS |
1447 | } |
1448 | ||
0238634d SS |
1449 | static void handle_vendor_event(struct xhci_hcd *xhci, |
1450 | union xhci_trb *event) | |
1451 | { | |
1452 | u32 trb_type; | |
1453 | ||
28ccd296 | 1454 | trb_type = TRB_FIELD_TO_TYPE(le32_to_cpu(event->generic.field[3])); |
0238634d SS |
1455 | xhci_dbg(xhci, "Vendor specific event TRB type = %u\n", trb_type); |
1456 | if (trb_type == TRB_NEC_CMD_COMP && (xhci->quirks & XHCI_NEC_HOST)) | |
1457 | handle_cmd_completion(xhci, &event->event_cmd); | |
1458 | } | |
1459 | ||
f6ff0ac8 SS |
1460 | /* @port_id: the one-based port ID from the hardware (indexed from array of all |
1461 | * port registers -- USB 3.0 and USB 2.0). | |
1462 | * | |
1463 | * Returns a zero-based port number, which is suitable for indexing into each of | |
1464 | * the split roothubs' port arrays and bus state arrays. | |
d0cd5d48 | 1465 | * Add one to it in order to call xhci_find_slot_id_by_port. |
f6ff0ac8 SS |
1466 | */ |
1467 | static unsigned int find_faked_portnum_from_hw_portnum(struct usb_hcd *hcd, | |
1468 | struct xhci_hcd *xhci, u32 port_id) | |
1469 | { | |
1470 | unsigned int i; | |
1471 | unsigned int num_similar_speed_ports = 0; | |
1472 | ||
1473 | /* port_id from the hardware is 1-based, but port_array[], usb3_ports[], | |
1474 | * and usb2_ports are 0-based indexes. Count the number of similar | |
1475 | * speed ports, up to 1 port before this port. | |
1476 | */ | |
1477 | for (i = 0; i < (port_id - 1); i++) { | |
1478 | u8 port_speed = xhci->port_array[i]; | |
1479 | ||
1480 | /* | |
1481 | * Skip ports that don't have known speeds, or have duplicate | |
1482 | * Extended Capabilities port speed entries. | |
1483 | */ | |
22e04870 | 1484 | if (port_speed == 0 || port_speed == DUPLICATE_ENTRY) |
f6ff0ac8 SS |
1485 | continue; |
1486 | ||
1487 | /* | |
1488 | * USB 3.0 ports are always under a USB 3.0 hub. USB 2.0 and | |
1489 | * 1.1 ports are under the USB 2.0 hub. If the port speed | |
1490 | * matches the device speed, it's a similar speed port. | |
1491 | */ | |
b50107bb | 1492 | if ((port_speed == 0x03) == (hcd->speed >= HCD_USB3)) |
f6ff0ac8 SS |
1493 | num_similar_speed_ports++; |
1494 | } | |
1495 | return num_similar_speed_ports; | |
1496 | } | |
1497 | ||
623bef9e SS |
1498 | static void handle_device_notification(struct xhci_hcd *xhci, |
1499 | union xhci_trb *event) | |
1500 | { | |
1501 | u32 slot_id; | |
4ee823b8 | 1502 | struct usb_device *udev; |
623bef9e | 1503 | |
7e76ad43 | 1504 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->generic.field[3])); |
4ee823b8 | 1505 | if (!xhci->devs[slot_id]) { |
623bef9e SS |
1506 | xhci_warn(xhci, "Device Notification event for " |
1507 | "unused slot %u\n", slot_id); | |
4ee823b8 SS |
1508 | return; |
1509 | } | |
1510 | ||
1511 | xhci_dbg(xhci, "Device Wake Notification event for slot ID %u\n", | |
1512 | slot_id); | |
1513 | udev = xhci->devs[slot_id]->udev; | |
1514 | if (udev && udev->parent) | |
1515 | usb_wakeup_notification(udev->parent, udev->portnum); | |
623bef9e SS |
1516 | } |
1517 | ||
0f2a7930 SS |
1518 | static void handle_port_status(struct xhci_hcd *xhci, |
1519 | union xhci_trb *event) | |
1520 | { | |
f6ff0ac8 | 1521 | struct usb_hcd *hcd; |
0f2a7930 | 1522 | u32 port_id; |
56192531 | 1523 | u32 temp, temp1; |
518e848e | 1524 | int max_ports; |
56192531 | 1525 | int slot_id; |
5308a91b | 1526 | unsigned int faked_port_index; |
f6ff0ac8 | 1527 | u8 major_revision; |
20b67cf5 | 1528 | struct xhci_bus_state *bus_state; |
28ccd296 | 1529 | __le32 __iomem **port_array; |
386139d7 | 1530 | bool bogus_port_status = false; |
0f2a7930 SS |
1531 | |
1532 | /* Port status change events always have a successful completion code */ | |
28ccd296 | 1533 | if (GET_COMP_CODE(le32_to_cpu(event->generic.field[2])) != COMP_SUCCESS) { |
0f2a7930 SS |
1534 | xhci_warn(xhci, "WARN: xHC returned failed port status event\n"); |
1535 | xhci->error_bitmask |= 1 << 8; | |
1536 | } | |
28ccd296 | 1537 | port_id = GET_PORT_ID(le32_to_cpu(event->generic.field[0])); |
0f2a7930 SS |
1538 | xhci_dbg(xhci, "Port Status Change Event for port %d\n", port_id); |
1539 | ||
518e848e SS |
1540 | max_ports = HCS_MAX_PORTS(xhci->hcs_params1); |
1541 | if ((port_id <= 0) || (port_id > max_ports)) { | |
56192531 | 1542 | xhci_warn(xhci, "Invalid port id %d\n", port_id); |
09ce0c0c PC |
1543 | inc_deq(xhci, xhci->event_ring); |
1544 | return; | |
56192531 AX |
1545 | } |
1546 | ||
f6ff0ac8 SS |
1547 | /* Figure out which usb_hcd this port is attached to: |
1548 | * is it a USB 3.0 port or a USB 2.0/1.1 port? | |
1549 | */ | |
1550 | major_revision = xhci->port_array[port_id - 1]; | |
09ce0c0c PC |
1551 | |
1552 | /* Find the right roothub. */ | |
1553 | hcd = xhci_to_hcd(xhci); | |
b50107bb | 1554 | if ((major_revision == 0x03) != (hcd->speed >= HCD_USB3)) |
09ce0c0c PC |
1555 | hcd = xhci->shared_hcd; |
1556 | ||
f6ff0ac8 SS |
1557 | if (major_revision == 0) { |
1558 | xhci_warn(xhci, "Event for port %u not in " | |
1559 | "Extended Capabilities, ignoring.\n", | |
1560 | port_id); | |
386139d7 | 1561 | bogus_port_status = true; |
f6ff0ac8 | 1562 | goto cleanup; |
5308a91b | 1563 | } |
22e04870 | 1564 | if (major_revision == DUPLICATE_ENTRY) { |
f6ff0ac8 SS |
1565 | xhci_warn(xhci, "Event for port %u duplicated in" |
1566 | "Extended Capabilities, ignoring.\n", | |
1567 | port_id); | |
386139d7 | 1568 | bogus_port_status = true; |
f6ff0ac8 SS |
1569 | goto cleanup; |
1570 | } | |
1571 | ||
1572 | /* | |
1573 | * Hardware port IDs reported by a Port Status Change Event include USB | |
1574 | * 3.0 and USB 2.0 ports. We want to check if the port has reported a | |
1575 | * resume event, but we first need to translate the hardware port ID | |
1576 | * into the index into the ports on the correct split roothub, and the | |
1577 | * correct bus_state structure. | |
1578 | */ | |
f6ff0ac8 | 1579 | bus_state = &xhci->bus_state[hcd_index(hcd)]; |
b50107bb | 1580 | if (hcd->speed >= HCD_USB3) |
f6ff0ac8 SS |
1581 | port_array = xhci->usb3_ports; |
1582 | else | |
1583 | port_array = xhci->usb2_ports; | |
1584 | /* Find the faked port hub number */ | |
1585 | faked_port_index = find_faked_portnum_from_hw_portnum(hcd, xhci, | |
1586 | port_id); | |
5308a91b | 1587 | |
b0ba9720 | 1588 | temp = readl(port_array[faked_port_index]); |
7111ebc9 | 1589 | if (hcd->state == HC_STATE_SUSPENDED) { |
56192531 AX |
1590 | xhci_dbg(xhci, "resume root hub\n"); |
1591 | usb_hcd_resume_root_hub(hcd); | |
1592 | } | |
1593 | ||
b50107bb | 1594 | if (hcd->speed >= HCD_USB3 && (temp & PORT_PLS_MASK) == XDEV_INACTIVE) |
fac4271d ZJC |
1595 | bus_state->port_remote_wakeup &= ~(1 << faked_port_index); |
1596 | ||
56192531 AX |
1597 | if ((temp & PORT_PLC) && (temp & PORT_PLS_MASK) == XDEV_RESUME) { |
1598 | xhci_dbg(xhci, "port resume event for port %d\n", port_id); | |
1599 | ||
b0ba9720 | 1600 | temp1 = readl(&xhci->op_regs->command); |
56192531 AX |
1601 | if (!(temp1 & CMD_RUN)) { |
1602 | xhci_warn(xhci, "xHC is not running.\n"); | |
1603 | goto cleanup; | |
1604 | } | |
1605 | ||
2338b9e4 | 1606 | if (DEV_SUPERSPEED_ANY(temp)) { |
d93814cf | 1607 | xhci_dbg(xhci, "remote wake SS port %d\n", port_id); |
4ee823b8 SS |
1608 | /* Set a flag to say the port signaled remote wakeup, |
1609 | * so we can tell the difference between the end of | |
1610 | * device and host initiated resume. | |
1611 | */ | |
1612 | bus_state->port_remote_wakeup |= 1 << faked_port_index; | |
d93814cf SS |
1613 | xhci_test_and_clear_bit(xhci, port_array, |
1614 | faked_port_index, PORT_PLC); | |
c9682dff AX |
1615 | xhci_set_link_state(xhci, port_array, faked_port_index, |
1616 | XDEV_U0); | |
d93814cf SS |
1617 | /* Need to wait until the next link state change |
1618 | * indicates the device is actually in U0. | |
1619 | */ | |
1620 | bogus_port_status = true; | |
1621 | goto cleanup; | |
f69115fd MN |
1622 | } else if (!test_bit(faked_port_index, |
1623 | &bus_state->resuming_ports)) { | |
56192531 | 1624 | xhci_dbg(xhci, "resume HS port %d\n", port_id); |
f6ff0ac8 | 1625 | bus_state->resume_done[faked_port_index] = jiffies + |
b9e45188 | 1626 | msecs_to_jiffies(USB_RESUME_TIMEOUT); |
f370b996 | 1627 | set_bit(faked_port_index, &bus_state->resuming_ports); |
56192531 | 1628 | mod_timer(&hcd->rh_timer, |
f6ff0ac8 | 1629 | bus_state->resume_done[faked_port_index]); |
56192531 AX |
1630 | /* Do the rest in GetPortStatus */ |
1631 | } | |
1632 | } | |
d93814cf SS |
1633 | |
1634 | if ((temp & PORT_PLC) && (temp & PORT_PLS_MASK) == XDEV_U0 && | |
2338b9e4 | 1635 | DEV_SUPERSPEED_ANY(temp)) { |
d93814cf | 1636 | xhci_dbg(xhci, "resume SS port %d finished\n", port_id); |
4ee823b8 SS |
1637 | /* We've just brought the device into U0 through either the |
1638 | * Resume state after a device remote wakeup, or through the | |
1639 | * U3Exit state after a host-initiated resume. If it's a device | |
1640 | * initiated remote wake, don't pass up the link state change, | |
1641 | * so the roothub behavior is consistent with external | |
1642 | * USB 3.0 hub behavior. | |
1643 | */ | |
d93814cf SS |
1644 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
1645 | faked_port_index + 1); | |
1646 | if (slot_id && xhci->devs[slot_id]) | |
1647 | xhci_ring_device(xhci, slot_id); | |
ba7b5c22 | 1648 | if (bus_state->port_remote_wakeup & (1 << faked_port_index)) { |
4ee823b8 SS |
1649 | bus_state->port_remote_wakeup &= |
1650 | ~(1 << faked_port_index); | |
1651 | xhci_test_and_clear_bit(xhci, port_array, | |
1652 | faked_port_index, PORT_PLC); | |
1653 | usb_wakeup_notification(hcd->self.root_hub, | |
1654 | faked_port_index + 1); | |
1655 | bogus_port_status = true; | |
1656 | goto cleanup; | |
1657 | } | |
d93814cf | 1658 | } |
56192531 | 1659 | |
8b3d4570 SS |
1660 | /* |
1661 | * Check to see if xhci-hub.c is waiting on RExit to U0 transition (or | |
1662 | * RExit to a disconnect state). If so, let the the driver know it's | |
1663 | * out of the RExit state. | |
1664 | */ | |
2338b9e4 | 1665 | if (!DEV_SUPERSPEED_ANY(temp) && |
8b3d4570 SS |
1666 | test_and_clear_bit(faked_port_index, |
1667 | &bus_state->rexit_ports)) { | |
1668 | complete(&bus_state->rexit_done[faked_port_index]); | |
1669 | bogus_port_status = true; | |
1670 | goto cleanup; | |
1671 | } | |
1672 | ||
b50107bb | 1673 | if (hcd->speed < HCD_USB3) |
6fd45621 AX |
1674 | xhci_test_and_clear_bit(xhci, port_array, faked_port_index, |
1675 | PORT_PLC); | |
1676 | ||
56192531 | 1677 | cleanup: |
0f2a7930 | 1678 | /* Update event ring dequeue pointer before dropping the lock */ |
3b72fca0 | 1679 | inc_deq(xhci, xhci->event_ring); |
0f2a7930 | 1680 | |
386139d7 SS |
1681 | /* Don't make the USB core poll the roothub if we got a bad port status |
1682 | * change event. Besides, at that point we can't tell which roothub | |
1683 | * (USB 2.0 or USB 3.0) to kick. | |
1684 | */ | |
1685 | if (bogus_port_status) | |
1686 | return; | |
1687 | ||
c52804a4 SS |
1688 | /* |
1689 | * xHCI port-status-change events occur when the "or" of all the | |
1690 | * status-change bits in the portsc register changes from 0 to 1. | |
1691 | * New status changes won't cause an event if any other change | |
1692 | * bits are still set. When an event occurs, switch over to | |
1693 | * polling to avoid losing status changes. | |
1694 | */ | |
1695 | xhci_dbg(xhci, "%s: starting port polling.\n", __func__); | |
1696 | set_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
0f2a7930 SS |
1697 | spin_unlock(&xhci->lock); |
1698 | /* Pass this up to the core */ | |
f6ff0ac8 | 1699 | usb_hcd_poll_rh_status(hcd); |
0f2a7930 SS |
1700 | spin_lock(&xhci->lock); |
1701 | } | |
1702 | ||
d0e96f5a SS |
1703 | /* |
1704 | * This TD is defined by the TRBs starting at start_trb in start_seg and ending | |
1705 | * at end_trb, which may be in another segment. If the suspect DMA address is a | |
1706 | * TRB in this TD, this function returns that TRB's segment. Otherwise it | |
1707 | * returns 0. | |
1708 | */ | |
cffb9be8 HG |
1709 | struct xhci_segment *trb_in_td(struct xhci_hcd *xhci, |
1710 | struct xhci_segment *start_seg, | |
d0e96f5a SS |
1711 | union xhci_trb *start_trb, |
1712 | union xhci_trb *end_trb, | |
cffb9be8 HG |
1713 | dma_addr_t suspect_dma, |
1714 | bool debug) | |
d0e96f5a SS |
1715 | { |
1716 | dma_addr_t start_dma; | |
1717 | dma_addr_t end_seg_dma; | |
1718 | dma_addr_t end_trb_dma; | |
1719 | struct xhci_segment *cur_seg; | |
1720 | ||
23e3be11 | 1721 | start_dma = xhci_trb_virt_to_dma(start_seg, start_trb); |
d0e96f5a SS |
1722 | cur_seg = start_seg; |
1723 | ||
1724 | do { | |
2fa88daa | 1725 | if (start_dma == 0) |
326b4810 | 1726 | return NULL; |
ae636747 | 1727 | /* We may get an event for a Link TRB in the middle of a TD */ |
23e3be11 | 1728 | end_seg_dma = xhci_trb_virt_to_dma(cur_seg, |
2fa88daa | 1729 | &cur_seg->trbs[TRBS_PER_SEGMENT - 1]); |
d0e96f5a | 1730 | /* If the end TRB isn't in this segment, this is set to 0 */ |
23e3be11 | 1731 | end_trb_dma = xhci_trb_virt_to_dma(cur_seg, end_trb); |
d0e96f5a | 1732 | |
cffb9be8 HG |
1733 | if (debug) |
1734 | xhci_warn(xhci, | |
1735 | "Looking for event-dma %016llx trb-start %016llx trb-end %016llx seg-start %016llx seg-end %016llx\n", | |
1736 | (unsigned long long)suspect_dma, | |
1737 | (unsigned long long)start_dma, | |
1738 | (unsigned long long)end_trb_dma, | |
1739 | (unsigned long long)cur_seg->dma, | |
1740 | (unsigned long long)end_seg_dma); | |
1741 | ||
d0e96f5a SS |
1742 | if (end_trb_dma > 0) { |
1743 | /* The end TRB is in this segment, so suspect should be here */ | |
1744 | if (start_dma <= end_trb_dma) { | |
1745 | if (suspect_dma >= start_dma && suspect_dma <= end_trb_dma) | |
1746 | return cur_seg; | |
1747 | } else { | |
1748 | /* Case for one segment with | |
1749 | * a TD wrapped around to the top | |
1750 | */ | |
1751 | if ((suspect_dma >= start_dma && | |
1752 | suspect_dma <= end_seg_dma) || | |
1753 | (suspect_dma >= cur_seg->dma && | |
1754 | suspect_dma <= end_trb_dma)) | |
1755 | return cur_seg; | |
1756 | } | |
326b4810 | 1757 | return NULL; |
d0e96f5a SS |
1758 | } else { |
1759 | /* Might still be somewhere in this segment */ | |
1760 | if (suspect_dma >= start_dma && suspect_dma <= end_seg_dma) | |
1761 | return cur_seg; | |
1762 | } | |
1763 | cur_seg = cur_seg->next; | |
23e3be11 | 1764 | start_dma = xhci_trb_virt_to_dma(cur_seg, &cur_seg->trbs[0]); |
2fa88daa | 1765 | } while (cur_seg != start_seg); |
d0e96f5a | 1766 | |
326b4810 | 1767 | return NULL; |
d0e96f5a SS |
1768 | } |
1769 | ||
bcef3fd5 SS |
1770 | static void xhci_cleanup_halted_endpoint(struct xhci_hcd *xhci, |
1771 | unsigned int slot_id, unsigned int ep_index, | |
e9df17eb | 1772 | unsigned int stream_id, |
f97c08ae | 1773 | struct xhci_td *td, union xhci_trb *ep_trb) |
bcef3fd5 SS |
1774 | { |
1775 | struct xhci_virt_ep *ep = &xhci->devs[slot_id]->eps[ep_index]; | |
ddba5cd0 MN |
1776 | struct xhci_command *command; |
1777 | command = xhci_alloc_command(xhci, false, false, GFP_ATOMIC); | |
1778 | if (!command) | |
1779 | return; | |
1780 | ||
d0167ad2 | 1781 | ep->ep_state |= EP_HALTED; |
e9df17eb | 1782 | ep->stopped_stream = stream_id; |
1624ae1c | 1783 | |
ddba5cd0 | 1784 | xhci_queue_reset_ep(xhci, command, slot_id, ep_index); |
d97b4f8d | 1785 | xhci_cleanup_stalled_ring(xhci, ep_index, td); |
1624ae1c | 1786 | |
5e5cf6fc | 1787 | ep->stopped_stream = 0; |
1624ae1c | 1788 | |
bcef3fd5 SS |
1789 | xhci_ring_cmd_db(xhci); |
1790 | } | |
1791 | ||
1792 | /* Check if an error has halted the endpoint ring. The class driver will | |
1793 | * cleanup the halt for a non-default control endpoint if we indicate a stall. | |
1794 | * However, a babble and other errors also halt the endpoint ring, and the class | |
1795 | * driver won't clear the halt in that case, so we need to issue a Set Transfer | |
1796 | * Ring Dequeue Pointer command manually. | |
1797 | */ | |
1798 | static int xhci_requires_manual_halt_cleanup(struct xhci_hcd *xhci, | |
1799 | struct xhci_ep_ctx *ep_ctx, | |
1800 | unsigned int trb_comp_code) | |
1801 | { | |
1802 | /* TRB completion codes that may require a manual halt cleanup */ | |
1803 | if (trb_comp_code == COMP_TX_ERR || | |
1804 | trb_comp_code == COMP_BABBLE || | |
1805 | trb_comp_code == COMP_SPLIT_ERR) | |
d4fc8bf5 | 1806 | /* The 0.95 spec says a babbling control endpoint |
bcef3fd5 SS |
1807 | * is not halted. The 0.96 spec says it is. Some HW |
1808 | * claims to be 0.95 compliant, but it halts the control | |
1809 | * endpoint anyway. Check if a babble halted the | |
1810 | * endpoint. | |
1811 | */ | |
f5960b69 ME |
1812 | if ((ep_ctx->ep_info & cpu_to_le32(EP_STATE_MASK)) == |
1813 | cpu_to_le32(EP_STATE_HALTED)) | |
bcef3fd5 SS |
1814 | return 1; |
1815 | ||
1816 | return 0; | |
1817 | } | |
1818 | ||
b45b5069 SS |
1819 | int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code) |
1820 | { | |
1821 | if (trb_comp_code >= 224 && trb_comp_code <= 255) { | |
1822 | /* Vendor defined "informational" completion code, | |
1823 | * treat as not-an-error. | |
1824 | */ | |
1825 | xhci_dbg(xhci, "Vendor defined info completion code %u\n", | |
1826 | trb_comp_code); | |
1827 | xhci_dbg(xhci, "Treating code as success.\n"); | |
1828 | return 1; | |
1829 | } | |
1830 | return 0; | |
1831 | } | |
1832 | ||
4422da61 AX |
1833 | /* |
1834 | * Finish the td processing, remove the td from td list; | |
1835 | * Return 1 if the urb can be given back. | |
1836 | */ | |
1837 | static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
f97c08ae | 1838 | union xhci_trb *ep_trb, struct xhci_transfer_event *event, |
4422da61 AX |
1839 | struct xhci_virt_ep *ep, int *status, bool skip) |
1840 | { | |
1841 | struct xhci_virt_device *xdev; | |
1842 | struct xhci_ring *ep_ring; | |
1843 | unsigned int slot_id; | |
1844 | int ep_index; | |
1845 | struct urb *urb = NULL; | |
1846 | struct xhci_ep_ctx *ep_ctx; | |
8e51adcc | 1847 | struct urb_priv *urb_priv; |
4422da61 AX |
1848 | u32 trb_comp_code; |
1849 | ||
28ccd296 | 1850 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
4422da61 | 1851 | xdev = xhci->devs[slot_id]; |
28ccd296 ME |
1852 | ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1; |
1853 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); | |
4422da61 | 1854 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
28ccd296 | 1855 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); |
4422da61 AX |
1856 | |
1857 | if (skip) | |
1858 | goto td_cleanup; | |
1859 | ||
40a3b775 LB |
1860 | if (trb_comp_code == COMP_STOP_INVAL || |
1861 | trb_comp_code == COMP_STOP || | |
1862 | trb_comp_code == COMP_STOP_SHORT) { | |
4422da61 AX |
1863 | /* The Endpoint Stop Command completion will take care of any |
1864 | * stopped TDs. A stopped TD may be restarted, so don't update | |
1865 | * the ring dequeue pointer or take this TD off any lists yet. | |
1866 | */ | |
1867 | ep->stopped_td = td; | |
4422da61 | 1868 | return 0; |
69defe04 MN |
1869 | } |
1870 | if (trb_comp_code == COMP_STALL || | |
1871 | xhci_requires_manual_halt_cleanup(xhci, ep_ctx, | |
1872 | trb_comp_code)) { | |
1873 | /* Issue a reset endpoint command to clear the host side | |
1874 | * halt, followed by a set dequeue command to move the | |
1875 | * dequeue pointer past the TD. | |
1876 | * The class driver clears the device side halt later. | |
1877 | */ | |
1878 | xhci_cleanup_halted_endpoint(xhci, slot_id, ep_index, | |
f97c08ae | 1879 | ep_ring->stream_id, td, ep_trb); |
4422da61 | 1880 | } else { |
69defe04 MN |
1881 | /* Update ring dequeue pointer */ |
1882 | while (ep_ring->dequeue != td->last_trb) | |
3b72fca0 | 1883 | inc_deq(xhci, ep_ring); |
69defe04 MN |
1884 | inc_deq(xhci, ep_ring); |
1885 | } | |
4422da61 AX |
1886 | |
1887 | td_cleanup: | |
69defe04 MN |
1888 | /* Clean up the endpoint's TD list */ |
1889 | urb = td->urb; | |
1890 | urb_priv = urb->hcpriv; | |
1891 | ||
f9c589e1 MN |
1892 | /* if a bounce buffer was used to align this td then unmap it */ |
1893 | if (td->bounce_seg) | |
1894 | xhci_unmap_td_bounce_buffer(xhci, ep_ring, td); | |
1895 | ||
69defe04 MN |
1896 | /* Do one last check of the actual transfer length. |
1897 | * If the host controller said we transferred more data than the buffer | |
1898 | * length, urb->actual_length will be a very big number (since it's | |
1899 | * unsigned). Play it safe and say we didn't transfer anything. | |
1900 | */ | |
1901 | if (urb->actual_length > urb->transfer_buffer_length) { | |
1902 | xhci_warn(xhci, "URB transfer length is wrong, xHC issue? req. len = %u, act. len = %u\n", | |
1903 | urb->transfer_buffer_length, | |
1904 | urb->actual_length); | |
1905 | urb->actual_length = 0; | |
69defe04 MN |
1906 | *status = 0; |
1907 | } | |
1908 | list_del_init(&td->td_list); | |
1909 | /* Was this TD slated to be cancelled but completed anyway? */ | |
1910 | if (!list_empty(&td->cancelled_td_list)) | |
1911 | list_del_init(&td->cancelled_td_list); | |
1912 | ||
1913 | urb_priv->td_cnt++; | |
1914 | /* Giveback the urb when all the tds are completed */ | |
1915 | if (urb_priv->td_cnt == urb_priv->length) { | |
69defe04 MN |
1916 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
1917 | xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs--; | |
1918 | if (xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs == 0) { | |
1919 | if (xhci->quirks & XHCI_AMD_PLL_FIX) | |
1920 | usb_amd_quirk_pll_enable(); | |
c41136b0 AX |
1921 | } |
1922 | } | |
0c03d89d | 1923 | xhci_giveback_urb_locked(xhci, td, *status); |
4422da61 AX |
1924 | } |
1925 | ||
0c03d89d | 1926 | return 0; |
4422da61 AX |
1927 | } |
1928 | ||
30a65b45 MN |
1929 | /* sum trb lengths from ring dequeue up to stop_trb, _excluding_ stop_trb */ |
1930 | static int sum_trb_lengths(struct xhci_hcd *xhci, struct xhci_ring *ring, | |
1931 | union xhci_trb *stop_trb) | |
1932 | { | |
1933 | u32 sum; | |
1934 | union xhci_trb *trb = ring->dequeue; | |
1935 | struct xhci_segment *seg = ring->deq_seg; | |
1936 | ||
1937 | for (sum = 0; trb != stop_trb; next_trb(xhci, ring, &seg, &trb)) { | |
1938 | if (!trb_is_noop(trb) && !trb_is_link(trb)) | |
1939 | sum += TRB_LEN(le32_to_cpu(trb->generic.field[2])); | |
1940 | } | |
1941 | return sum; | |
1942 | } | |
1943 | ||
8af56be1 AX |
1944 | /* |
1945 | * Process control tds, update urb status and actual_length. | |
1946 | */ | |
1947 | static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
f97c08ae | 1948 | union xhci_trb *ep_trb, struct xhci_transfer_event *event, |
8af56be1 AX |
1949 | struct xhci_virt_ep *ep, int *status) |
1950 | { | |
1951 | struct xhci_virt_device *xdev; | |
1952 | struct xhci_ring *ep_ring; | |
1953 | unsigned int slot_id; | |
1954 | int ep_index; | |
1955 | struct xhci_ep_ctx *ep_ctx; | |
1956 | u32 trb_comp_code; | |
0b6c324c MN |
1957 | u32 remaining, requested; |
1958 | bool on_data_stage; | |
8af56be1 | 1959 | |
28ccd296 | 1960 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
8af56be1 | 1961 | xdev = xhci->devs[slot_id]; |
28ccd296 ME |
1962 | ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1; |
1963 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); | |
8af56be1 | 1964 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
28ccd296 | 1965 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); |
0b6c324c MN |
1966 | requested = td->urb->transfer_buffer_length; |
1967 | remaining = EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); | |
1968 | ||
1969 | /* not setup (dequeue), or status stage means we are at data stage */ | |
f97c08ae | 1970 | on_data_stage = (ep_trb != ep_ring->dequeue && ep_trb != td->last_trb); |
8af56be1 | 1971 | |
8af56be1 AX |
1972 | switch (trb_comp_code) { |
1973 | case COMP_SUCCESS: | |
f97c08ae | 1974 | if (ep_trb != td->last_trb) { |
0b6c324c MN |
1975 | xhci_warn(xhci, "WARN: Success on ctrl %s TRB without IOC set?\n", |
1976 | on_data_stage ? "data" : "setup"); | |
8af56be1 | 1977 | *status = -ESHUTDOWN; |
0b6c324c | 1978 | break; |
8af56be1 | 1979 | } |
0b6c324c | 1980 | *status = 0; |
8af56be1 AX |
1981 | break; |
1982 | case COMP_SHORT_TX: | |
0b6c324c | 1983 | *status = 0; |
8af56be1 | 1984 | break; |
40a3b775 | 1985 | case COMP_STOP_SHORT: |
0b6c324c MN |
1986 | if (on_data_stage) |
1987 | td->urb->actual_length = remaining; | |
40a3b775 | 1988 | else |
0b6c324c MN |
1989 | xhci_warn(xhci, "WARN: Stopped Short Packet on ctrl setup or status TRB\n"); |
1990 | goto finish_td; | |
3abeca99 | 1991 | case COMP_STOP: |
0b6c324c MN |
1992 | if (on_data_stage) |
1993 | td->urb->actual_length = requested - remaining; | |
1994 | goto finish_td; | |
40a3b775 | 1995 | case COMP_STOP_INVAL: |
0b6c324c | 1996 | goto finish_td; |
8af56be1 AX |
1997 | default: |
1998 | if (!xhci_requires_manual_halt_cleanup(xhci, | |
0b6c324c | 1999 | ep_ctx, trb_comp_code)) |
8af56be1 | 2000 | break; |
0b6c324c MN |
2001 | xhci_dbg(xhci, "TRB error %u, halted endpoint index = %u\n", |
2002 | trb_comp_code, ep_index); | |
8af56be1 AX |
2003 | /* else fall through */ |
2004 | case COMP_STALL: | |
2005 | /* Did we transfer part of the data (middle) phase? */ | |
0b6c324c MN |
2006 | if (on_data_stage) |
2007 | td->urb->actual_length = requested - remaining; | |
22ae47e6 | 2008 | else if (!td->urb_length_set) |
8af56be1 | 2009 | td->urb->actual_length = 0; |
0b6c324c | 2010 | goto finish_td; |
8af56be1 | 2011 | } |
0b6c324c MN |
2012 | |
2013 | /* stopped at setup stage, no data transferred */ | |
f97c08ae | 2014 | if (ep_trb == ep_ring->dequeue) |
0b6c324c MN |
2015 | goto finish_td; |
2016 | ||
8af56be1 | 2017 | /* |
0b6c324c MN |
2018 | * if on data stage then update the actual_length of the URB and flag it |
2019 | * as set, so it won't be overwritten in the event for the last TRB. | |
8af56be1 | 2020 | */ |
0b6c324c MN |
2021 | if (on_data_stage) { |
2022 | td->urb_length_set = true; | |
2023 | td->urb->actual_length = requested - remaining; | |
2024 | xhci_dbg(xhci, "Waiting for status stage event\n"); | |
2025 | return 0; | |
8af56be1 AX |
2026 | } |
2027 | ||
0b6c324c MN |
2028 | /* at status stage */ |
2029 | if (!td->urb_length_set) | |
2030 | td->urb->actual_length = requested; | |
2031 | ||
2032 | finish_td: | |
f97c08ae | 2033 | return finish_td(xhci, td, ep_trb, event, ep, status, false); |
8af56be1 AX |
2034 | } |
2035 | ||
04e51901 AX |
2036 | /* |
2037 | * Process isochronous tds, update urb packet status and actual_length. | |
2038 | */ | |
2039 | static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
f97c08ae | 2040 | union xhci_trb *ep_trb, struct xhci_transfer_event *event, |
04e51901 AX |
2041 | struct xhci_virt_ep *ep, int *status) |
2042 | { | |
2043 | struct xhci_ring *ep_ring; | |
2044 | struct urb_priv *urb_priv; | |
2045 | int idx; | |
926008c9 | 2046 | struct usb_iso_packet_descriptor *frame; |
04e51901 | 2047 | u32 trb_comp_code; |
36da3a1d MN |
2048 | bool sum_trbs_for_length = false; |
2049 | u32 remaining, requested, ep_trb_len; | |
2050 | int short_framestatus; | |
04e51901 | 2051 | |
28ccd296 ME |
2052 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
2053 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); | |
04e51901 AX |
2054 | urb_priv = td->urb->hcpriv; |
2055 | idx = urb_priv->td_cnt; | |
926008c9 | 2056 | frame = &td->urb->iso_frame_desc[idx]; |
36da3a1d MN |
2057 | requested = frame->length; |
2058 | remaining = EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); | |
2059 | ep_trb_len = TRB_LEN(le32_to_cpu(ep_trb->generic.field[2])); | |
2060 | short_framestatus = td->urb->transfer_flags & URB_SHORT_NOT_OK ? | |
2061 | -EREMOTEIO : 0; | |
04e51901 | 2062 | |
926008c9 DT |
2063 | /* handle completion code */ |
2064 | switch (trb_comp_code) { | |
2065 | case COMP_SUCCESS: | |
36da3a1d MN |
2066 | if (remaining) { |
2067 | frame->status = short_framestatus; | |
2068 | if (xhci->quirks & XHCI_TRUST_TX_LENGTH) | |
2069 | sum_trbs_for_length = true; | |
1530bbc6 SS |
2070 | break; |
2071 | } | |
36da3a1d MN |
2072 | frame->status = 0; |
2073 | break; | |
926008c9 | 2074 | case COMP_SHORT_TX: |
36da3a1d MN |
2075 | frame->status = short_framestatus; |
2076 | sum_trbs_for_length = true; | |
926008c9 DT |
2077 | break; |
2078 | case COMP_BW_OVER: | |
2079 | frame->status = -ECOMM; | |
926008c9 DT |
2080 | break; |
2081 | case COMP_BUFF_OVER: | |
2082 | case COMP_BABBLE: | |
2083 | frame->status = -EOVERFLOW; | |
926008c9 | 2084 | break; |
f6ba6fe2 | 2085 | case COMP_DEV_ERR: |
926008c9 | 2086 | case COMP_STALL: |
d104d015 | 2087 | frame->status = -EPROTO; |
d104d015 | 2088 | break; |
9c745995 | 2089 | case COMP_TX_ERR: |
926008c9 | 2090 | frame->status = -EPROTO; |
f97c08ae | 2091 | if (ep_trb != td->last_trb) |
d104d015 | 2092 | return 0; |
926008c9 DT |
2093 | break; |
2094 | case COMP_STOP: | |
36da3a1d MN |
2095 | sum_trbs_for_length = true; |
2096 | break; | |
2097 | case COMP_STOP_SHORT: | |
2098 | /* field normally containing residue now contains tranferred */ | |
2099 | frame->status = short_framestatus; | |
2100 | requested = remaining; | |
2101 | break; | |
926008c9 | 2102 | case COMP_STOP_INVAL: |
36da3a1d MN |
2103 | requested = 0; |
2104 | remaining = 0; | |
926008c9 DT |
2105 | break; |
2106 | default: | |
36da3a1d | 2107 | sum_trbs_for_length = true; |
926008c9 DT |
2108 | frame->status = -1; |
2109 | break; | |
04e51901 AX |
2110 | } |
2111 | ||
36da3a1d MN |
2112 | if (sum_trbs_for_length) |
2113 | frame->actual_length = sum_trb_lengths(xhci, ep_ring, ep_trb) + | |
2114 | ep_trb_len - remaining; | |
2115 | else | |
2116 | frame->actual_length = requested; | |
04e51901 | 2117 | |
36da3a1d | 2118 | td->urb->actual_length += frame->actual_length; |
04e51901 | 2119 | |
f97c08ae | 2120 | return finish_td(xhci, td, ep_trb, event, ep, status, false); |
04e51901 AX |
2121 | } |
2122 | ||
926008c9 DT |
2123 | static int skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td, |
2124 | struct xhci_transfer_event *event, | |
2125 | struct xhci_virt_ep *ep, int *status) | |
2126 | { | |
2127 | struct xhci_ring *ep_ring; | |
2128 | struct urb_priv *urb_priv; | |
2129 | struct usb_iso_packet_descriptor *frame; | |
2130 | int idx; | |
2131 | ||
f6975314 | 2132 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
926008c9 DT |
2133 | urb_priv = td->urb->hcpriv; |
2134 | idx = urb_priv->td_cnt; | |
2135 | frame = &td->urb->iso_frame_desc[idx]; | |
2136 | ||
b3df3f9c | 2137 | /* The transfer is partly done. */ |
926008c9 DT |
2138 | frame->status = -EXDEV; |
2139 | ||
2140 | /* calc actual length */ | |
2141 | frame->actual_length = 0; | |
2142 | ||
2143 | /* Update ring dequeue pointer */ | |
2144 | while (ep_ring->dequeue != td->last_trb) | |
3b72fca0 AX |
2145 | inc_deq(xhci, ep_ring); |
2146 | inc_deq(xhci, ep_ring); | |
926008c9 DT |
2147 | |
2148 | return finish_td(xhci, td, NULL, event, ep, status, true); | |
2149 | } | |
2150 | ||
22405ed2 AX |
2151 | /* |
2152 | * Process bulk and interrupt tds, update urb status and actual_length. | |
2153 | */ | |
2154 | static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
f97c08ae | 2155 | union xhci_trb *ep_trb, struct xhci_transfer_event *event, |
22405ed2 AX |
2156 | struct xhci_virt_ep *ep, int *status) |
2157 | { | |
2158 | struct xhci_ring *ep_ring; | |
22405ed2 | 2159 | u32 trb_comp_code; |
f97c08ae | 2160 | u32 remaining, requested, ep_trb_len; |
22405ed2 | 2161 | |
28ccd296 ME |
2162 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
2163 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); | |
30a65b45 | 2164 | remaining = EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); |
f97c08ae | 2165 | ep_trb_len = TRB_LEN(le32_to_cpu(ep_trb->generic.field[2])); |
30a65b45 | 2166 | requested = td->urb->transfer_buffer_length; |
22405ed2 AX |
2167 | |
2168 | switch (trb_comp_code) { | |
2169 | case COMP_SUCCESS: | |
30a65b45 | 2170 | /* handle success with untransferred data as short packet */ |
f97c08ae | 2171 | if (ep_trb != td->last_trb || remaining) { |
52ab8685 | 2172 | xhci_warn(xhci, "WARN Successful completion on short TX\n"); |
30a65b45 MN |
2173 | xhci_dbg(xhci, "ep %#x - asked for %d bytes, %d bytes untransferred\n", |
2174 | td->urb->ep->desc.bEndpointAddress, | |
2175 | requested, remaining); | |
22405ed2 | 2176 | } |
52ab8685 | 2177 | *status = 0; |
22405ed2 AX |
2178 | break; |
2179 | case COMP_SHORT_TX: | |
30a65b45 MN |
2180 | xhci_dbg(xhci, "ep %#x - asked for %d bytes, %d bytes untransferred\n", |
2181 | td->urb->ep->desc.bEndpointAddress, | |
2182 | requested, remaining); | |
52ab8685 | 2183 | *status = 0; |
22405ed2 | 2184 | break; |
30a65b45 MN |
2185 | case COMP_STOP_SHORT: |
2186 | td->urb->actual_length = remaining; | |
2187 | goto finish_td; | |
2188 | case COMP_STOP_INVAL: | |
2189 | /* stopped on ep trb with invalid length, exclude it */ | |
f97c08ae | 2190 | ep_trb_len = 0; |
30a65b45 MN |
2191 | remaining = 0; |
2192 | break; | |
22405ed2 | 2193 | default: |
30a65b45 | 2194 | /* do nothing */ |
22405ed2 AX |
2195 | break; |
2196 | } | |
40a3b775 | 2197 | |
f97c08ae | 2198 | if (ep_trb == td->last_trb) |
30a65b45 MN |
2199 | td->urb->actual_length = requested - remaining; |
2200 | else | |
2201 | td->urb->actual_length = | |
f97c08ae MN |
2202 | sum_trb_lengths(xhci, ep_ring, ep_trb) + |
2203 | ep_trb_len - remaining; | |
30a65b45 MN |
2204 | finish_td: |
2205 | if (remaining > requested) { | |
2206 | xhci_warn(xhci, "bad transfer trb length %d in event trb\n", | |
2207 | remaining); | |
22405ed2 | 2208 | td->urb->actual_length = 0; |
22405ed2 | 2209 | } |
f97c08ae | 2210 | return finish_td(xhci, td, ep_trb, event, ep, status, false); |
22405ed2 AX |
2211 | } |
2212 | ||
d0e96f5a SS |
2213 | /* |
2214 | * If this function returns an error condition, it means it got a Transfer | |
2215 | * event with a corrupted Slot ID, Endpoint ID, or TRB DMA address. | |
2216 | * At this point, the host controller is probably hosed and should be reset. | |
2217 | */ | |
2218 | static int handle_tx_event(struct xhci_hcd *xhci, | |
2219 | struct xhci_transfer_event *event) | |
ed384bd3 FB |
2220 | __releases(&xhci->lock) |
2221 | __acquires(&xhci->lock) | |
d0e96f5a SS |
2222 | { |
2223 | struct xhci_virt_device *xdev; | |
63a0d9ab | 2224 | struct xhci_virt_ep *ep; |
d0e96f5a | 2225 | struct xhci_ring *ep_ring; |
82d1009f | 2226 | unsigned int slot_id; |
d0e96f5a | 2227 | int ep_index; |
326b4810 | 2228 | struct xhci_td *td = NULL; |
f97c08ae MN |
2229 | dma_addr_t ep_trb_dma; |
2230 | struct xhci_segment *ep_seg; | |
2231 | union xhci_trb *ep_trb; | |
d0e96f5a | 2232 | int status = -EINPROGRESS; |
d115b048 | 2233 | struct xhci_ep_ctx *ep_ctx; |
c2d7b49f | 2234 | struct list_head *tmp; |
66d1eebc | 2235 | u32 trb_comp_code; |
c2d7b49f | 2236 | int td_num = 0; |
3b4739b8 | 2237 | bool handling_skipped_tds = false; |
d0e96f5a | 2238 | |
28ccd296 | 2239 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
82d1009f | 2240 | xdev = xhci->devs[slot_id]; |
d0e96f5a SS |
2241 | if (!xdev) { |
2242 | xhci_err(xhci, "ERROR Transfer event pointed to bad slot\n"); | |
9258c0b2 | 2243 | xhci_err(xhci, "@%016llx %08x %08x %08x %08x\n", |
e910b440 SS |
2244 | (unsigned long long) xhci_trb_virt_to_dma( |
2245 | xhci->event_ring->deq_seg, | |
9258c0b2 SS |
2246 | xhci->event_ring->dequeue), |
2247 | lower_32_bits(le64_to_cpu(event->buffer)), | |
2248 | upper_32_bits(le64_to_cpu(event->buffer)), | |
2249 | le32_to_cpu(event->transfer_len), | |
2250 | le32_to_cpu(event->flags)); | |
2251 | xhci_dbg(xhci, "Event ring:\n"); | |
2252 | xhci_debug_segment(xhci, xhci->event_ring->deq_seg); | |
d0e96f5a SS |
2253 | return -ENODEV; |
2254 | } | |
2255 | ||
2256 | /* Endpoint ID is 1 based, our index is zero based */ | |
28ccd296 | 2257 | ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1; |
63a0d9ab | 2258 | ep = &xdev->eps[ep_index]; |
28ccd296 | 2259 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
d115b048 | 2260 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
986a92d4 | 2261 | if (!ep_ring || |
28ccd296 ME |
2262 | (le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK) == |
2263 | EP_STATE_DISABLED) { | |
e9df17eb SS |
2264 | xhci_err(xhci, "ERROR Transfer event for disabled endpoint " |
2265 | "or incorrect stream ring\n"); | |
9258c0b2 | 2266 | xhci_err(xhci, "@%016llx %08x %08x %08x %08x\n", |
e910b440 SS |
2267 | (unsigned long long) xhci_trb_virt_to_dma( |
2268 | xhci->event_ring->deq_seg, | |
9258c0b2 SS |
2269 | xhci->event_ring->dequeue), |
2270 | lower_32_bits(le64_to_cpu(event->buffer)), | |
2271 | upper_32_bits(le64_to_cpu(event->buffer)), | |
2272 | le32_to_cpu(event->transfer_len), | |
2273 | le32_to_cpu(event->flags)); | |
2274 | xhci_dbg(xhci, "Event ring:\n"); | |
2275 | xhci_debug_segment(xhci, xhci->event_ring->deq_seg); | |
d0e96f5a SS |
2276 | return -ENODEV; |
2277 | } | |
2278 | ||
c2d7b49f AX |
2279 | /* Count current td numbers if ep->skip is set */ |
2280 | if (ep->skip) { | |
2281 | list_for_each(tmp, &ep_ring->td_list) | |
2282 | td_num++; | |
2283 | } | |
2284 | ||
f97c08ae | 2285 | ep_trb_dma = le64_to_cpu(event->buffer); |
28ccd296 | 2286 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); |
986a92d4 | 2287 | /* Look for common error cases */ |
66d1eebc | 2288 | switch (trb_comp_code) { |
b10de142 SS |
2289 | /* Skip codes that require special handling depending on |
2290 | * transfer type | |
2291 | */ | |
2292 | case COMP_SUCCESS: | |
1c11a172 | 2293 | if (EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)) == 0) |
1530bbc6 SS |
2294 | break; |
2295 | if (xhci->quirks & XHCI_TRUST_TX_LENGTH) | |
2296 | trb_comp_code = COMP_SHORT_TX; | |
2297 | else | |
8202ce2e SS |
2298 | xhci_warn_ratelimited(xhci, |
2299 | "WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?\n"); | |
b10de142 SS |
2300 | case COMP_SHORT_TX: |
2301 | break; | |
ae636747 SS |
2302 | case COMP_STOP: |
2303 | xhci_dbg(xhci, "Stopped on Transfer TRB\n"); | |
2304 | break; | |
2305 | case COMP_STOP_INVAL: | |
2306 | xhci_dbg(xhci, "Stopped on No-op or Link TRB\n"); | |
2307 | break; | |
40a3b775 LB |
2308 | case COMP_STOP_SHORT: |
2309 | xhci_dbg(xhci, "Stopped with short packet transfer detected\n"); | |
2310 | break; | |
b10de142 | 2311 | case COMP_STALL: |
2a9227a5 | 2312 | xhci_dbg(xhci, "Stalled endpoint\n"); |
63a0d9ab | 2313 | ep->ep_state |= EP_HALTED; |
b10de142 SS |
2314 | status = -EPIPE; |
2315 | break; | |
2316 | case COMP_TRB_ERR: | |
2317 | xhci_warn(xhci, "WARN: TRB error on endpoint\n"); | |
2318 | status = -EILSEQ; | |
2319 | break; | |
ec74e403 | 2320 | case COMP_SPLIT_ERR: |
b10de142 | 2321 | case COMP_TX_ERR: |
2a9227a5 | 2322 | xhci_dbg(xhci, "Transfer error on endpoint\n"); |
b10de142 SS |
2323 | status = -EPROTO; |
2324 | break; | |
4a73143c | 2325 | case COMP_BABBLE: |
2a9227a5 | 2326 | xhci_dbg(xhci, "Babble error on endpoint\n"); |
4a73143c SS |
2327 | status = -EOVERFLOW; |
2328 | break; | |
b10de142 SS |
2329 | case COMP_DB_ERR: |
2330 | xhci_warn(xhci, "WARN: HC couldn't access mem fast enough\n"); | |
2331 | status = -ENOSR; | |
2332 | break; | |
986a92d4 AX |
2333 | case COMP_BW_OVER: |
2334 | xhci_warn(xhci, "WARN: bandwidth overrun event on endpoint\n"); | |
2335 | break; | |
2336 | case COMP_BUFF_OVER: | |
2337 | xhci_warn(xhci, "WARN: buffer overrun event on endpoint\n"); | |
2338 | break; | |
2339 | case COMP_UNDERRUN: | |
2340 | /* | |
2341 | * When the Isoch ring is empty, the xHC will generate | |
2342 | * a Ring Overrun Event for IN Isoch endpoint or Ring | |
2343 | * Underrun Event for OUT Isoch endpoint. | |
2344 | */ | |
2345 | xhci_dbg(xhci, "underrun event on endpoint\n"); | |
2346 | if (!list_empty(&ep_ring->td_list)) | |
2347 | xhci_dbg(xhci, "Underrun Event for slot %d ep %d " | |
2348 | "still with TDs queued?\n", | |
28ccd296 ME |
2349 | TRB_TO_SLOT_ID(le32_to_cpu(event->flags)), |
2350 | ep_index); | |
986a92d4 AX |
2351 | goto cleanup; |
2352 | case COMP_OVERRUN: | |
2353 | xhci_dbg(xhci, "overrun event on endpoint\n"); | |
2354 | if (!list_empty(&ep_ring->td_list)) | |
2355 | xhci_dbg(xhci, "Overrun Event for slot %d ep %d " | |
2356 | "still with TDs queued?\n", | |
28ccd296 ME |
2357 | TRB_TO_SLOT_ID(le32_to_cpu(event->flags)), |
2358 | ep_index); | |
986a92d4 | 2359 | goto cleanup; |
f6ba6fe2 AH |
2360 | case COMP_DEV_ERR: |
2361 | xhci_warn(xhci, "WARN: detect an incompatible device"); | |
2362 | status = -EPROTO; | |
2363 | break; | |
d18240db AX |
2364 | case COMP_MISSED_INT: |
2365 | /* | |
2366 | * When encounter missed service error, one or more isoc tds | |
2367 | * may be missed by xHC. | |
2368 | * Set skip flag of the ep_ring; Complete the missed tds as | |
2369 | * short transfer when process the ep_ring next time. | |
2370 | */ | |
2371 | ep->skip = true; | |
2372 | xhci_dbg(xhci, "Miss service interval error, set skip flag\n"); | |
2373 | goto cleanup; | |
3b4739b8 MN |
2374 | case COMP_PING_ERR: |
2375 | ep->skip = true; | |
2376 | xhci_dbg(xhci, "No Ping response error, Skip one Isoc TD\n"); | |
2377 | goto cleanup; | |
b10de142 | 2378 | default: |
b45b5069 | 2379 | if (xhci_is_vendor_info_code(xhci, trb_comp_code)) { |
5ad6a529 SS |
2380 | status = 0; |
2381 | break; | |
2382 | } | |
86cd740a MN |
2383 | xhci_warn(xhci, "ERROR Unknown event condition %u, HC probably busted\n", |
2384 | trb_comp_code); | |
986a92d4 AX |
2385 | goto cleanup; |
2386 | } | |
2387 | ||
d18240db AX |
2388 | do { |
2389 | /* This TRB should be in the TD at the head of this ring's | |
2390 | * TD list. | |
2391 | */ | |
2392 | if (list_empty(&ep_ring->td_list)) { | |
a83d6755 SS |
2393 | /* |
2394 | * A stopped endpoint may generate an extra completion | |
2395 | * event if the device was suspended. Don't print | |
2396 | * warnings. | |
2397 | */ | |
2398 | if (!(trb_comp_code == COMP_STOP || | |
2399 | trb_comp_code == COMP_STOP_INVAL)) { | |
2400 | xhci_warn(xhci, "WARN Event TRB for slot %d ep %d with no TDs queued?\n", | |
2401 | TRB_TO_SLOT_ID(le32_to_cpu(event->flags)), | |
2402 | ep_index); | |
2403 | xhci_dbg(xhci, "Event TRB with TRB type ID %u\n", | |
2404 | (le32_to_cpu(event->flags) & | |
2405 | TRB_TYPE_BITMASK)>>10); | |
2406 | xhci_print_trb_offsets(xhci, (union xhci_trb *) event); | |
2407 | } | |
d18240db AX |
2408 | if (ep->skip) { |
2409 | ep->skip = false; | |
2410 | xhci_dbg(xhci, "td_list is empty while skip " | |
2411 | "flag set. Clear skip flag.\n"); | |
2412 | } | |
d18240db AX |
2413 | goto cleanup; |
2414 | } | |
986a92d4 | 2415 | |
c2d7b49f AX |
2416 | /* We've skipped all the TDs on the ep ring when ep->skip set */ |
2417 | if (ep->skip && td_num == 0) { | |
2418 | ep->skip = false; | |
2419 | xhci_dbg(xhci, "All tds on the ep_ring skipped. " | |
2420 | "Clear skip flag.\n"); | |
c2d7b49f AX |
2421 | goto cleanup; |
2422 | } | |
2423 | ||
d18240db | 2424 | td = list_entry(ep_ring->td_list.next, struct xhci_td, td_list); |
c2d7b49f AX |
2425 | if (ep->skip) |
2426 | td_num--; | |
926008c9 | 2427 | |
d18240db | 2428 | /* Is this a TRB in the currently executing TD? */ |
f97c08ae MN |
2429 | ep_seg = trb_in_td(xhci, ep_ring->deq_seg, ep_ring->dequeue, |
2430 | td->last_trb, ep_trb_dma, false); | |
e1cf486d AH |
2431 | |
2432 | /* | |
2433 | * Skip the Force Stopped Event. The event_trb(event_dma) of FSE | |
2434 | * is not in the current TD pointed by ep_ring->dequeue because | |
2435 | * that the hardware dequeue pointer still at the previous TRB | |
2436 | * of the current TD. The previous TRB maybe a Link TD or the | |
2437 | * last TRB of the previous TD. The command completion handle | |
2438 | * will take care the rest. | |
2439 | */ | |
f97c08ae | 2440 | if (!ep_seg && (trb_comp_code == COMP_STOP || |
9a548863 | 2441 | trb_comp_code == COMP_STOP_INVAL)) { |
e1cf486d AH |
2442 | goto cleanup; |
2443 | } | |
2444 | ||
f97c08ae | 2445 | if (!ep_seg) { |
926008c9 DT |
2446 | if (!ep->skip || |
2447 | !usb_endpoint_xfer_isoc(&td->urb->ep->desc)) { | |
ad808333 SS |
2448 | /* Some host controllers give a spurious |
2449 | * successful event after a short transfer. | |
2450 | * Ignore it. | |
2451 | */ | |
ddba5cd0 | 2452 | if ((xhci->quirks & XHCI_SPURIOUS_SUCCESS) && |
ad808333 SS |
2453 | ep_ring->last_td_was_short) { |
2454 | ep_ring->last_td_was_short = false; | |
ad808333 SS |
2455 | goto cleanup; |
2456 | } | |
926008c9 DT |
2457 | /* HC is busted, give up! */ |
2458 | xhci_err(xhci, | |
2459 | "ERROR Transfer event TRB DMA ptr not " | |
cffb9be8 HG |
2460 | "part of current TD ep_index %d " |
2461 | "comp_code %u\n", ep_index, | |
2462 | trb_comp_code); | |
2463 | trb_in_td(xhci, ep_ring->deq_seg, | |
2464 | ep_ring->dequeue, td->last_trb, | |
f97c08ae | 2465 | ep_trb_dma, true); |
926008c9 DT |
2466 | return -ESHUTDOWN; |
2467 | } | |
2468 | ||
0c03d89d | 2469 | skip_isoc_td(xhci, td, event, ep, &status); |
926008c9 DT |
2470 | goto cleanup; |
2471 | } | |
ad808333 SS |
2472 | if (trb_comp_code == COMP_SHORT_TX) |
2473 | ep_ring->last_td_was_short = true; | |
2474 | else | |
2475 | ep_ring->last_td_was_short = false; | |
926008c9 DT |
2476 | |
2477 | if (ep->skip) { | |
d18240db AX |
2478 | xhci_dbg(xhci, "Found td. Clear skip flag.\n"); |
2479 | ep->skip = false; | |
2480 | } | |
678539cf | 2481 | |
f97c08ae MN |
2482 | ep_trb = &ep_seg->trbs[(ep_trb_dma - ep_seg->dma) / |
2483 | sizeof(*ep_trb)]; | |
926008c9 DT |
2484 | /* |
2485 | * No-op TRB should not trigger interrupts. | |
f97c08ae | 2486 | * If ep_trb is a no-op TRB, it means the |
926008c9 DT |
2487 | * corresponding TD has been cancelled. Just ignore |
2488 | * the TD. | |
2489 | */ | |
f97c08ae MN |
2490 | if (trb_is_noop(ep_trb)) { |
2491 | xhci_dbg(xhci, "ep_trb is a no-op TRB. Skip it\n"); | |
926008c9 | 2492 | goto cleanup; |
d18240db | 2493 | } |
4422da61 | 2494 | |
0c03d89d | 2495 | /* update the urb's actual_length and give back to the core */ |
d18240db | 2496 | if (usb_endpoint_xfer_control(&td->urb->ep->desc)) |
0c03d89d | 2497 | process_ctrl_td(xhci, td, ep_trb, event, ep, &status); |
04e51901 | 2498 | else if (usb_endpoint_xfer_isoc(&td->urb->ep->desc)) |
0c03d89d | 2499 | process_isoc_td(xhci, td, ep_trb, event, ep, &status); |
d18240db | 2500 | else |
0c03d89d MN |
2501 | process_bulk_intr_td(xhci, td, ep_trb, event, ep, |
2502 | &status); | |
d18240db | 2503 | cleanup: |
3b4739b8 MN |
2504 | handling_skipped_tds = ep->skip && |
2505 | trb_comp_code != COMP_MISSED_INT && | |
2506 | trb_comp_code != COMP_PING_ERR; | |
2507 | ||
d18240db | 2508 | /* |
3b4739b8 MN |
2509 | * Do not update event ring dequeue pointer if we're in a loop |
2510 | * processing missed tds. | |
d18240db | 2511 | */ |
3b4739b8 | 2512 | if (!handling_skipped_tds) |
3b72fca0 | 2513 | inc_deq(xhci, xhci->event_ring); |
d18240db | 2514 | |
d18240db AX |
2515 | /* |
2516 | * If ep->skip is set, it means there are missed tds on the | |
2517 | * endpoint ring need to take care of. | |
2518 | * Process them as short transfer until reach the td pointed by | |
2519 | * the event. | |
2520 | */ | |
3b4739b8 | 2521 | } while (handling_skipped_tds); |
d18240db | 2522 | |
d0e96f5a SS |
2523 | return 0; |
2524 | } | |
2525 | ||
0f2a7930 SS |
2526 | /* |
2527 | * This function handles all OS-owned events on the event ring. It may drop | |
2528 | * xhci->lock between event processing (e.g. to pass up port status changes). | |
9dee9a21 ME |
2529 | * Returns >0 for "possibly more events to process" (caller should call again), |
2530 | * otherwise 0 if done. In future, <0 returns should indicate error code. | |
0f2a7930 | 2531 | */ |
9dee9a21 | 2532 | static int xhci_handle_event(struct xhci_hcd *xhci) |
7f84eef0 SS |
2533 | { |
2534 | union xhci_trb *event; | |
0f2a7930 | 2535 | int update_ptrs = 1; |
d0e96f5a | 2536 | int ret; |
7f84eef0 SS |
2537 | |
2538 | if (!xhci->event_ring || !xhci->event_ring->dequeue) { | |
2539 | xhci->error_bitmask |= 1 << 1; | |
9dee9a21 | 2540 | return 0; |
7f84eef0 SS |
2541 | } |
2542 | ||
2543 | event = xhci->event_ring->dequeue; | |
2544 | /* Does the HC or OS own the TRB? */ | |
28ccd296 ME |
2545 | if ((le32_to_cpu(event->event_cmd.flags) & TRB_CYCLE) != |
2546 | xhci->event_ring->cycle_state) { | |
7f84eef0 | 2547 | xhci->error_bitmask |= 1 << 2; |
9dee9a21 | 2548 | return 0; |
7f84eef0 SS |
2549 | } |
2550 | ||
92a3da41 ME |
2551 | /* |
2552 | * Barrier between reading the TRB_CYCLE (valid) flag above and any | |
2553 | * speculative reads of the event's flags/data below. | |
2554 | */ | |
2555 | rmb(); | |
0f2a7930 | 2556 | /* FIXME: Handle more event types. */ |
28ccd296 | 2557 | switch ((le32_to_cpu(event->event_cmd.flags) & TRB_TYPE_BITMASK)) { |
7f84eef0 SS |
2558 | case TRB_TYPE(TRB_COMPLETION): |
2559 | handle_cmd_completion(xhci, &event->event_cmd); | |
2560 | break; | |
0f2a7930 SS |
2561 | case TRB_TYPE(TRB_PORT_STATUS): |
2562 | handle_port_status(xhci, event); | |
2563 | update_ptrs = 0; | |
2564 | break; | |
d0e96f5a SS |
2565 | case TRB_TYPE(TRB_TRANSFER): |
2566 | ret = handle_tx_event(xhci, &event->trans_event); | |
2567 | if (ret < 0) | |
2568 | xhci->error_bitmask |= 1 << 9; | |
2569 | else | |
2570 | update_ptrs = 0; | |
2571 | break; | |
623bef9e SS |
2572 | case TRB_TYPE(TRB_DEV_NOTE): |
2573 | handle_device_notification(xhci, event); | |
2574 | break; | |
7f84eef0 | 2575 | default: |
28ccd296 ME |
2576 | if ((le32_to_cpu(event->event_cmd.flags) & TRB_TYPE_BITMASK) >= |
2577 | TRB_TYPE(48)) | |
0238634d SS |
2578 | handle_vendor_event(xhci, event); |
2579 | else | |
2580 | xhci->error_bitmask |= 1 << 3; | |
7f84eef0 | 2581 | } |
6f5165cf SS |
2582 | /* Any of the above functions may drop and re-acquire the lock, so check |
2583 | * to make sure a watchdog timer didn't mark the host as non-responsive. | |
2584 | */ | |
2585 | if (xhci->xhc_state & XHCI_STATE_DYING) { | |
2586 | xhci_dbg(xhci, "xHCI host dying, returning from " | |
2587 | "event handler.\n"); | |
9dee9a21 | 2588 | return 0; |
6f5165cf | 2589 | } |
7f84eef0 | 2590 | |
c06d68b8 SS |
2591 | if (update_ptrs) |
2592 | /* Update SW event ring dequeue pointer */ | |
3b72fca0 | 2593 | inc_deq(xhci, xhci->event_ring); |
c06d68b8 | 2594 | |
9dee9a21 ME |
2595 | /* Are there more items on the event ring? Caller will call us again to |
2596 | * check. | |
2597 | */ | |
2598 | return 1; | |
7f84eef0 | 2599 | } |
9032cd52 SS |
2600 | |
2601 | /* | |
2602 | * xHCI spec says we can get an interrupt, and if the HC has an error condition, | |
2603 | * we might get bad data out of the event ring. Section 4.10.2.7 has a list of | |
2604 | * indicators of an event TRB error, but we check the status *first* to be safe. | |
2605 | */ | |
2606 | irqreturn_t xhci_irq(struct usb_hcd *hcd) | |
2607 | { | |
2608 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
c21599a3 | 2609 | u32 status; |
bda53145 | 2610 | u64 temp_64; |
c06d68b8 SS |
2611 | union xhci_trb *event_ring_deq; |
2612 | dma_addr_t deq; | |
9032cd52 SS |
2613 | |
2614 | spin_lock(&xhci->lock); | |
9032cd52 | 2615 | /* Check if the xHC generated the interrupt, or the irq is shared */ |
b0ba9720 | 2616 | status = readl(&xhci->op_regs->status); |
c21599a3 | 2617 | if (status == 0xffffffff) |
9032cd52 SS |
2618 | goto hw_died; |
2619 | ||
c21599a3 | 2620 | if (!(status & STS_EINT)) { |
9032cd52 | 2621 | spin_unlock(&xhci->lock); |
9032cd52 SS |
2622 | return IRQ_NONE; |
2623 | } | |
27e0dd4d | 2624 | if (status & STS_FATAL) { |
9032cd52 SS |
2625 | xhci_warn(xhci, "WARNING: Host System Error\n"); |
2626 | xhci_halt(xhci); | |
2627 | hw_died: | |
9032cd52 | 2628 | spin_unlock(&xhci->lock); |
948fa135 | 2629 | return IRQ_HANDLED; |
9032cd52 SS |
2630 | } |
2631 | ||
bda53145 SS |
2632 | /* |
2633 | * Clear the op reg interrupt status first, | |
2634 | * so we can receive interrupts from other MSI-X interrupters. | |
2635 | * Write 1 to clear the interrupt status. | |
2636 | */ | |
27e0dd4d | 2637 | status |= STS_EINT; |
204b7793 | 2638 | writel(status, &xhci->op_regs->status); |
bda53145 SS |
2639 | /* FIXME when MSI-X is supported and there are multiple vectors */ |
2640 | /* Clear the MSI-X event interrupt status */ | |
2641 | ||
cd70469d | 2642 | if (hcd->irq) { |
c21599a3 SS |
2643 | u32 irq_pending; |
2644 | /* Acknowledge the PCI interrupt */ | |
b0ba9720 | 2645 | irq_pending = readl(&xhci->ir_set->irq_pending); |
4e833c0b | 2646 | irq_pending |= IMAN_IP; |
204b7793 | 2647 | writel(irq_pending, &xhci->ir_set->irq_pending); |
c21599a3 | 2648 | } |
bda53145 | 2649 | |
27a41a83 GKB |
2650 | if (xhci->xhc_state & XHCI_STATE_DYING || |
2651 | xhci->xhc_state & XHCI_STATE_HALTED) { | |
bda53145 SS |
2652 | xhci_dbg(xhci, "xHCI dying, ignoring interrupt. " |
2653 | "Shouldn't IRQs be disabled?\n"); | |
c06d68b8 SS |
2654 | /* Clear the event handler busy flag (RW1C); |
2655 | * the event ring should be empty. | |
bda53145 | 2656 | */ |
f7b2e403 | 2657 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
477632df SS |
2658 | xhci_write_64(xhci, temp_64 | ERST_EHB, |
2659 | &xhci->ir_set->erst_dequeue); | |
c06d68b8 SS |
2660 | spin_unlock(&xhci->lock); |
2661 | ||
2662 | return IRQ_HANDLED; | |
2663 | } | |
2664 | ||
2665 | event_ring_deq = xhci->event_ring->dequeue; | |
2666 | /* FIXME this should be a delayed service routine | |
2667 | * that clears the EHB. | |
2668 | */ | |
9dee9a21 | 2669 | while (xhci_handle_event(xhci) > 0) {} |
bda53145 | 2670 | |
f7b2e403 | 2671 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
c06d68b8 SS |
2672 | /* If necessary, update the HW's version of the event ring deq ptr. */ |
2673 | if (event_ring_deq != xhci->event_ring->dequeue) { | |
2674 | deq = xhci_trb_virt_to_dma(xhci->event_ring->deq_seg, | |
2675 | xhci->event_ring->dequeue); | |
2676 | if (deq == 0) | |
2677 | xhci_warn(xhci, "WARN something wrong with SW event " | |
2678 | "ring dequeue ptr.\n"); | |
2679 | /* Update HC event ring dequeue pointer */ | |
2680 | temp_64 &= ERST_PTR_MASK; | |
2681 | temp_64 |= ((u64) deq & (u64) ~ERST_PTR_MASK); | |
2682 | } | |
2683 | ||
2684 | /* Clear the event handler busy flag (RW1C); event ring is empty. */ | |
2685 | temp_64 |= ERST_EHB; | |
477632df | 2686 | xhci_write_64(xhci, temp_64, &xhci->ir_set->erst_dequeue); |
c06d68b8 | 2687 | |
9032cd52 SS |
2688 | spin_unlock(&xhci->lock); |
2689 | ||
2690 | return IRQ_HANDLED; | |
2691 | } | |
2692 | ||
851ec164 | 2693 | irqreturn_t xhci_msi_irq(int irq, void *hcd) |
9032cd52 | 2694 | { |
968b822c | 2695 | return xhci_irq(hcd); |
9032cd52 | 2696 | } |
7f84eef0 | 2697 | |
d0e96f5a SS |
2698 | /**** Endpoint Ring Operations ****/ |
2699 | ||
7f84eef0 SS |
2700 | /* |
2701 | * Generic function for queueing a TRB on a ring. | |
2702 | * The caller must have checked to make sure there's room on the ring. | |
6cc30d85 SS |
2703 | * |
2704 | * @more_trbs_coming: Will you enqueue more TRBs before calling | |
2705 | * prepare_transfer()? | |
7f84eef0 SS |
2706 | */ |
2707 | static void queue_trb(struct xhci_hcd *xhci, struct xhci_ring *ring, | |
3b72fca0 | 2708 | bool more_trbs_coming, |
7f84eef0 SS |
2709 | u32 field1, u32 field2, u32 field3, u32 field4) |
2710 | { | |
2711 | struct xhci_generic_trb *trb; | |
2712 | ||
2713 | trb = &ring->enqueue->generic; | |
28ccd296 ME |
2714 | trb->field[0] = cpu_to_le32(field1); |
2715 | trb->field[1] = cpu_to_le32(field2); | |
2716 | trb->field[2] = cpu_to_le32(field3); | |
2717 | trb->field[3] = cpu_to_le32(field4); | |
3b72fca0 | 2718 | inc_enq(xhci, ring, more_trbs_coming); |
7f84eef0 SS |
2719 | } |
2720 | ||
d0e96f5a SS |
2721 | /* |
2722 | * Does various checks on the endpoint ring, and makes it ready to queue num_trbs. | |
2723 | * FIXME allocate segments if the ring is full. | |
2724 | */ | |
2725 | static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring, | |
3b72fca0 | 2726 | u32 ep_state, unsigned int num_trbs, gfp_t mem_flags) |
d0e96f5a | 2727 | { |
8dfec614 AX |
2728 | unsigned int num_trbs_needed; |
2729 | ||
d0e96f5a | 2730 | /* Make sure the endpoint has been added to xHC schedule */ |
d0e96f5a SS |
2731 | switch (ep_state) { |
2732 | case EP_STATE_DISABLED: | |
2733 | /* | |
2734 | * USB core changed config/interfaces without notifying us, | |
2735 | * or hardware is reporting the wrong state. | |
2736 | */ | |
2737 | xhci_warn(xhci, "WARN urb submitted to disabled ep\n"); | |
2738 | return -ENOENT; | |
d0e96f5a | 2739 | case EP_STATE_ERROR: |
c92bcfa7 | 2740 | xhci_warn(xhci, "WARN waiting for error on ep to be cleared\n"); |
d0e96f5a SS |
2741 | /* FIXME event handling code for error needs to clear it */ |
2742 | /* XXX not sure if this should be -ENOENT or not */ | |
2743 | return -EINVAL; | |
c92bcfa7 SS |
2744 | case EP_STATE_HALTED: |
2745 | xhci_dbg(xhci, "WARN halted endpoint, queueing URB anyway.\n"); | |
d0e96f5a SS |
2746 | case EP_STATE_STOPPED: |
2747 | case EP_STATE_RUNNING: | |
2748 | break; | |
2749 | default: | |
2750 | xhci_err(xhci, "ERROR unknown endpoint state for ep\n"); | |
2751 | /* | |
2752 | * FIXME issue Configure Endpoint command to try to get the HC | |
2753 | * back into a known state. | |
2754 | */ | |
2755 | return -EINVAL; | |
2756 | } | |
8dfec614 AX |
2757 | |
2758 | while (1) { | |
3d4b81ed SS |
2759 | if (room_on_ring(xhci, ep_ring, num_trbs)) |
2760 | break; | |
8dfec614 AX |
2761 | |
2762 | if (ep_ring == xhci->cmd_ring) { | |
2763 | xhci_err(xhci, "Do not support expand command ring\n"); | |
2764 | return -ENOMEM; | |
2765 | } | |
2766 | ||
68ffb011 XR |
2767 | xhci_dbg_trace(xhci, trace_xhci_dbg_ring_expansion, |
2768 | "ERROR no room on ep ring, try ring expansion"); | |
8dfec614 AX |
2769 | num_trbs_needed = num_trbs - ep_ring->num_trbs_free; |
2770 | if (xhci_ring_expansion(xhci, ep_ring, num_trbs_needed, | |
2771 | mem_flags)) { | |
2772 | xhci_err(xhci, "Ring expansion failed\n"); | |
2773 | return -ENOMEM; | |
2774 | } | |
261fa12b | 2775 | } |
6c12db90 | 2776 | |
d0c77d84 MN |
2777 | while (trb_is_link(ep_ring->enqueue)) { |
2778 | /* If we're not dealing with 0.95 hardware or isoc rings | |
2779 | * on AMD 0.96 host, clear the chain bit. | |
2780 | */ | |
2781 | if (!xhci_link_trb_quirk(xhci) && | |
2782 | !(ep_ring->type == TYPE_ISOC && | |
2783 | (xhci->quirks & XHCI_AMD_0x96_HOST))) | |
2784 | ep_ring->enqueue->link.control &= | |
2785 | cpu_to_le32(~TRB_CHAIN); | |
2786 | else | |
2787 | ep_ring->enqueue->link.control |= | |
2788 | cpu_to_le32(TRB_CHAIN); | |
6c12db90 | 2789 | |
d0c77d84 MN |
2790 | wmb(); |
2791 | ep_ring->enqueue->link.control ^= cpu_to_le32(TRB_CYCLE); | |
6c12db90 | 2792 | |
d0c77d84 MN |
2793 | /* Toggle the cycle bit after the last ring segment. */ |
2794 | if (link_trb_toggles_cycle(ep_ring->enqueue)) | |
2795 | ep_ring->cycle_state ^= 1; | |
6c12db90 | 2796 | |
d0c77d84 MN |
2797 | ep_ring->enq_seg = ep_ring->enq_seg->next; |
2798 | ep_ring->enqueue = ep_ring->enq_seg->trbs; | |
6c12db90 | 2799 | } |
d0e96f5a SS |
2800 | return 0; |
2801 | } | |
2802 | ||
23e3be11 | 2803 | static int prepare_transfer(struct xhci_hcd *xhci, |
d0e96f5a SS |
2804 | struct xhci_virt_device *xdev, |
2805 | unsigned int ep_index, | |
e9df17eb | 2806 | unsigned int stream_id, |
d0e96f5a SS |
2807 | unsigned int num_trbs, |
2808 | struct urb *urb, | |
8e51adcc | 2809 | unsigned int td_index, |
d0e96f5a SS |
2810 | gfp_t mem_flags) |
2811 | { | |
2812 | int ret; | |
8e51adcc AX |
2813 | struct urb_priv *urb_priv; |
2814 | struct xhci_td *td; | |
e9df17eb | 2815 | struct xhci_ring *ep_ring; |
d115b048 | 2816 | struct xhci_ep_ctx *ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
e9df17eb SS |
2817 | |
2818 | ep_ring = xhci_stream_id_to_ring(xdev, ep_index, stream_id); | |
2819 | if (!ep_ring) { | |
2820 | xhci_dbg(xhci, "Can't prepare ring for bad stream ID %u\n", | |
2821 | stream_id); | |
2822 | return -EINVAL; | |
2823 | } | |
2824 | ||
2825 | ret = prepare_ring(xhci, ep_ring, | |
28ccd296 | 2826 | le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK, |
3b72fca0 | 2827 | num_trbs, mem_flags); |
d0e96f5a SS |
2828 | if (ret) |
2829 | return ret; | |
d0e96f5a | 2830 | |
8e51adcc AX |
2831 | urb_priv = urb->hcpriv; |
2832 | td = urb_priv->td[td_index]; | |
2833 | ||
2834 | INIT_LIST_HEAD(&td->td_list); | |
2835 | INIT_LIST_HEAD(&td->cancelled_td_list); | |
2836 | ||
2837 | if (td_index == 0) { | |
214f76f7 | 2838 | ret = usb_hcd_link_urb_to_ep(bus_to_hcd(urb->dev->bus), urb); |
d13565c1 | 2839 | if (unlikely(ret)) |
8e51adcc | 2840 | return ret; |
d0e96f5a SS |
2841 | } |
2842 | ||
8e51adcc | 2843 | td->urb = urb; |
d0e96f5a | 2844 | /* Add this TD to the tail of the endpoint ring's TD list */ |
8e51adcc AX |
2845 | list_add_tail(&td->td_list, &ep_ring->td_list); |
2846 | td->start_seg = ep_ring->enq_seg; | |
2847 | td->first_trb = ep_ring->enqueue; | |
2848 | ||
2849 | urb_priv->td[td_index] = td; | |
d0e96f5a SS |
2850 | |
2851 | return 0; | |
2852 | } | |
2853 | ||
d2510342 AI |
2854 | static unsigned int count_trbs(u64 addr, u64 len) |
2855 | { | |
2856 | unsigned int num_trbs; | |
2857 | ||
2858 | num_trbs = DIV_ROUND_UP(len + (addr & (TRB_MAX_BUFF_SIZE - 1)), | |
2859 | TRB_MAX_BUFF_SIZE); | |
2860 | if (num_trbs == 0) | |
2861 | num_trbs++; | |
2862 | ||
2863 | return num_trbs; | |
2864 | } | |
2865 | ||
2866 | static inline unsigned int count_trbs_needed(struct urb *urb) | |
2867 | { | |
2868 | return count_trbs(urb->transfer_dma, urb->transfer_buffer_length); | |
2869 | } | |
2870 | ||
2871 | static unsigned int count_sg_trbs_needed(struct urb *urb) | |
8a96c052 | 2872 | { |
8a96c052 | 2873 | struct scatterlist *sg; |
d2510342 | 2874 | unsigned int i, len, full_len, num_trbs = 0; |
8a96c052 | 2875 | |
d2510342 | 2876 | full_len = urb->transfer_buffer_length; |
8a96c052 | 2877 | |
d2510342 AI |
2878 | for_each_sg(urb->sg, sg, urb->num_mapped_sgs, i) { |
2879 | len = sg_dma_len(sg); | |
2880 | num_trbs += count_trbs(sg_dma_address(sg), len); | |
2881 | len = min_t(unsigned int, len, full_len); | |
2882 | full_len -= len; | |
2883 | if (full_len == 0) | |
8a96c052 SS |
2884 | break; |
2885 | } | |
d2510342 | 2886 | |
8a96c052 SS |
2887 | return num_trbs; |
2888 | } | |
2889 | ||
d2510342 AI |
2890 | static unsigned int count_isoc_trbs_needed(struct urb *urb, int i) |
2891 | { | |
2892 | u64 addr, len; | |
2893 | ||
2894 | addr = (u64) (urb->transfer_dma + urb->iso_frame_desc[i].offset); | |
2895 | len = urb->iso_frame_desc[i].length; | |
2896 | ||
2897 | return count_trbs(addr, len); | |
2898 | } | |
2899 | ||
2900 | static void check_trb_math(struct urb *urb, int running_total) | |
8a96c052 | 2901 | { |
d2510342 | 2902 | if (unlikely(running_total != urb->transfer_buffer_length)) |
a2490187 | 2903 | dev_err(&urb->dev->dev, "%s - ep %#x - Miscalculated tx length, " |
8a96c052 SS |
2904 | "queued %#x (%d), asked for %#x (%d)\n", |
2905 | __func__, | |
2906 | urb->ep->desc.bEndpointAddress, | |
2907 | running_total, running_total, | |
2908 | urb->transfer_buffer_length, | |
2909 | urb->transfer_buffer_length); | |
2910 | } | |
2911 | ||
23e3be11 | 2912 | static void giveback_first_trb(struct xhci_hcd *xhci, int slot_id, |
e9df17eb | 2913 | unsigned int ep_index, unsigned int stream_id, int start_cycle, |
e1eab2e0 | 2914 | struct xhci_generic_trb *start_trb) |
8a96c052 | 2915 | { |
8a96c052 SS |
2916 | /* |
2917 | * Pass all the TRBs to the hardware at once and make sure this write | |
2918 | * isn't reordered. | |
2919 | */ | |
2920 | wmb(); | |
50f7b52a | 2921 | if (start_cycle) |
28ccd296 | 2922 | start_trb->field[3] |= cpu_to_le32(start_cycle); |
50f7b52a | 2923 | else |
28ccd296 | 2924 | start_trb->field[3] &= cpu_to_le32(~TRB_CYCLE); |
be88fe4f | 2925 | xhci_ring_ep_doorbell(xhci, slot_id, ep_index, stream_id); |
8a96c052 SS |
2926 | } |
2927 | ||
78140156 AI |
2928 | static void check_interval(struct xhci_hcd *xhci, struct urb *urb, |
2929 | struct xhci_ep_ctx *ep_ctx) | |
624defa1 | 2930 | { |
624defa1 SS |
2931 | int xhci_interval; |
2932 | int ep_interval; | |
2933 | ||
28ccd296 | 2934 | xhci_interval = EP_INTERVAL_TO_UFRAMES(le32_to_cpu(ep_ctx->ep_info)); |
624defa1 | 2935 | ep_interval = urb->interval; |
78140156 | 2936 | |
624defa1 SS |
2937 | /* Convert to microframes */ |
2938 | if (urb->dev->speed == USB_SPEED_LOW || | |
2939 | urb->dev->speed == USB_SPEED_FULL) | |
2940 | ep_interval *= 8; | |
78140156 | 2941 | |
624defa1 SS |
2942 | /* FIXME change this to a warning and a suggestion to use the new API |
2943 | * to set the polling interval (once the API is added). | |
2944 | */ | |
2945 | if (xhci_interval != ep_interval) { | |
0730d52a DK |
2946 | dev_dbg_ratelimited(&urb->dev->dev, |
2947 | "Driver uses different interval (%d microframe%s) than xHCI (%d microframe%s)\n", | |
2948 | ep_interval, ep_interval == 1 ? "" : "s", | |
2949 | xhci_interval, xhci_interval == 1 ? "" : "s"); | |
624defa1 SS |
2950 | urb->interval = xhci_interval; |
2951 | /* Convert back to frames for LS/FS devices */ | |
2952 | if (urb->dev->speed == USB_SPEED_LOW || | |
2953 | urb->dev->speed == USB_SPEED_FULL) | |
2954 | urb->interval /= 8; | |
2955 | } | |
78140156 AI |
2956 | } |
2957 | ||
2958 | /* | |
2959 | * xHCI uses normal TRBs for both bulk and interrupt. When the interrupt | |
2960 | * endpoint is to be serviced, the xHC will consume (at most) one TD. A TD | |
2961 | * (comprised of sg list entries) can take several service intervals to | |
2962 | * transmit. | |
2963 | */ | |
2964 | int xhci_queue_intr_tx(struct xhci_hcd *xhci, gfp_t mem_flags, | |
2965 | struct urb *urb, int slot_id, unsigned int ep_index) | |
2966 | { | |
2967 | struct xhci_ep_ctx *ep_ctx; | |
2968 | ||
2969 | ep_ctx = xhci_get_ep_ctx(xhci, xhci->devs[slot_id]->out_ctx, ep_index); | |
2970 | check_interval(xhci, urb, ep_ctx); | |
2971 | ||
3fc8206d | 2972 | return xhci_queue_bulk_tx(xhci, mem_flags, urb, slot_id, ep_index); |
624defa1 SS |
2973 | } |
2974 | ||
4da6e6f2 | 2975 | /* |
4525c0a1 SS |
2976 | * For xHCI 1.0 host controllers, TD size is the number of max packet sized |
2977 | * packets remaining in the TD (*not* including this TRB). | |
4da6e6f2 SS |
2978 | * |
2979 | * Total TD packet count = total_packet_count = | |
4525c0a1 | 2980 | * DIV_ROUND_UP(TD size in bytes / wMaxPacketSize) |
4da6e6f2 SS |
2981 | * |
2982 | * Packets transferred up to and including this TRB = packets_transferred = | |
2983 | * rounddown(total bytes transferred including this TRB / wMaxPacketSize) | |
2984 | * | |
2985 | * TD size = total_packet_count - packets_transferred | |
2986 | * | |
c840d6ce MN |
2987 | * For xHCI 0.96 and older, TD size field should be the remaining bytes |
2988 | * including this TRB, right shifted by 10 | |
2989 | * | |
2990 | * For all hosts it must fit in bits 21:17, so it can't be bigger than 31. | |
2991 | * This is taken care of in the TRB_TD_SIZE() macro | |
2992 | * | |
4525c0a1 | 2993 | * The last TRB in a TD must have the TD size set to zero. |
4da6e6f2 | 2994 | */ |
c840d6ce MN |
2995 | static u32 xhci_td_remainder(struct xhci_hcd *xhci, int transferred, |
2996 | int trb_buff_len, unsigned int td_total_len, | |
124c3937 | 2997 | struct urb *urb, bool more_trbs_coming) |
4da6e6f2 | 2998 | { |
c840d6ce MN |
2999 | u32 maxp, total_packet_count; |
3000 | ||
0cbd4b34 CY |
3001 | /* MTK xHCI is mostly 0.97 but contains some features from 1.0 */ |
3002 | if (xhci->hci_version < 0x100 && !(xhci->quirks & XHCI_MTK_HOST)) | |
c840d6ce MN |
3003 | return ((td_total_len - transferred) >> 10); |
3004 | ||
48df4a6f | 3005 | /* One TRB with a zero-length data packet. */ |
124c3937 | 3006 | if (!more_trbs_coming || (transferred == 0 && trb_buff_len == 0) || |
c840d6ce | 3007 | trb_buff_len == td_total_len) |
48df4a6f SS |
3008 | return 0; |
3009 | ||
0cbd4b34 CY |
3010 | /* for MTK xHCI, TD size doesn't include this TRB */ |
3011 | if (xhci->quirks & XHCI_MTK_HOST) | |
3012 | trb_buff_len = 0; | |
3013 | ||
3014 | maxp = GET_MAX_PACKET(usb_endpoint_maxp(&urb->ep->desc)); | |
3015 | total_packet_count = DIV_ROUND_UP(td_total_len, maxp); | |
3016 | ||
c840d6ce MN |
3017 | /* Queueing functions don't count the current TRB into transferred */ |
3018 | return (total_packet_count - ((transferred + trb_buff_len) / maxp)); | |
4da6e6f2 SS |
3019 | } |
3020 | ||
f9c589e1 | 3021 | |
474ed23a | 3022 | static int xhci_align_td(struct xhci_hcd *xhci, struct urb *urb, u32 enqd_len, |
f9c589e1 | 3023 | u32 *trb_buff_len, struct xhci_segment *seg) |
474ed23a | 3024 | { |
f9c589e1 | 3025 | struct device *dev = xhci_to_hcd(xhci)->self.controller; |
474ed23a MN |
3026 | unsigned int unalign; |
3027 | unsigned int max_pkt; | |
f9c589e1 | 3028 | u32 new_buff_len; |
474ed23a MN |
3029 | |
3030 | max_pkt = GET_MAX_PACKET(usb_endpoint_maxp(&urb->ep->desc)); | |
3031 | unalign = (enqd_len + *trb_buff_len) % max_pkt; | |
3032 | ||
3033 | /* we got lucky, last normal TRB data on segment is packet aligned */ | |
3034 | if (unalign == 0) | |
3035 | return 0; | |
3036 | ||
f9c589e1 MN |
3037 | xhci_dbg(xhci, "Unaligned %d bytes, buff len %d\n", |
3038 | unalign, *trb_buff_len); | |
3039 | ||
474ed23a MN |
3040 | /* is the last nornal TRB alignable by splitting it */ |
3041 | if (*trb_buff_len > unalign) { | |
3042 | *trb_buff_len -= unalign; | |
f9c589e1 | 3043 | xhci_dbg(xhci, "split align, new buff len %d\n", *trb_buff_len); |
474ed23a MN |
3044 | return 0; |
3045 | } | |
f9c589e1 MN |
3046 | |
3047 | /* | |
3048 | * We want enqd_len + trb_buff_len to sum up to a number aligned to | |
3049 | * number which is divisible by the endpoint's wMaxPacketSize. IOW: | |
3050 | * (size of currently enqueued TRBs + remainder) % wMaxPacketSize == 0. | |
3051 | */ | |
3052 | new_buff_len = max_pkt - (enqd_len % max_pkt); | |
3053 | ||
3054 | if (new_buff_len > (urb->transfer_buffer_length - enqd_len)) | |
3055 | new_buff_len = (urb->transfer_buffer_length - enqd_len); | |
3056 | ||
3057 | /* create a max max_pkt sized bounce buffer pointed to by last trb */ | |
3058 | if (usb_urb_dir_out(urb)) { | |
3059 | sg_pcopy_to_buffer(urb->sg, urb->num_mapped_sgs, | |
3060 | seg->bounce_buf, new_buff_len, enqd_len); | |
3061 | seg->bounce_dma = dma_map_single(dev, seg->bounce_buf, | |
3062 | max_pkt, DMA_TO_DEVICE); | |
3063 | } else { | |
3064 | seg->bounce_dma = dma_map_single(dev, seg->bounce_buf, | |
3065 | max_pkt, DMA_FROM_DEVICE); | |
3066 | } | |
3067 | ||
3068 | if (dma_mapping_error(dev, seg->bounce_dma)) { | |
3069 | /* try without aligning. Some host controllers survive */ | |
3070 | xhci_warn(xhci, "Failed mapping bounce buffer, not aligning\n"); | |
3071 | return 0; | |
3072 | } | |
3073 | *trb_buff_len = new_buff_len; | |
3074 | seg->bounce_len = new_buff_len; | |
3075 | seg->bounce_offs = enqd_len; | |
3076 | ||
3077 | xhci_dbg(xhci, "Bounce align, new buff len %d\n", *trb_buff_len); | |
3078 | ||
474ed23a MN |
3079 | return 1; |
3080 | } | |
3081 | ||
d2510342 AI |
3082 | /* This is very similar to what ehci-q.c qtd_fill() does */ |
3083 | int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, | |
8a96c052 SS |
3084 | struct urb *urb, int slot_id, unsigned int ep_index) |
3085 | { | |
5a5a0b1a | 3086 | struct xhci_ring *ring; |
8e51adcc | 3087 | struct urb_priv *urb_priv; |
8a96c052 | 3088 | struct xhci_td *td; |
d2510342 AI |
3089 | struct xhci_generic_trb *start_trb; |
3090 | struct scatterlist *sg = NULL; | |
5a83f04a MN |
3091 | bool more_trbs_coming = true; |
3092 | bool need_zero_pkt = false; | |
86065c27 MN |
3093 | bool first_trb = true; |
3094 | unsigned int num_trbs; | |
d2510342 | 3095 | unsigned int start_cycle, num_sgs = 0; |
86065c27 | 3096 | unsigned int enqd_len, block_len, trb_buff_len, full_len; |
f9c589e1 | 3097 | int sent_len, ret; |
d2510342 | 3098 | u32 field, length_field, remainder; |
f9c589e1 | 3099 | u64 addr, send_addr; |
8a96c052 | 3100 | |
5a5a0b1a MN |
3101 | ring = xhci_urb_to_transfer_ring(xhci, urb); |
3102 | if (!ring) | |
e9df17eb SS |
3103 | return -EINVAL; |
3104 | ||
86065c27 | 3105 | full_len = urb->transfer_buffer_length; |
d2510342 AI |
3106 | /* If we have scatter/gather list, we use it. */ |
3107 | if (urb->num_sgs) { | |
3108 | num_sgs = urb->num_mapped_sgs; | |
3109 | sg = urb->sg; | |
86065c27 MN |
3110 | addr = (u64) sg_dma_address(sg); |
3111 | block_len = sg_dma_len(sg); | |
d2510342 | 3112 | num_trbs = count_sg_trbs_needed(urb); |
86065c27 | 3113 | } else { |
d2510342 | 3114 | num_trbs = count_trbs_needed(urb); |
86065c27 MN |
3115 | addr = (u64) urb->transfer_dma; |
3116 | block_len = full_len; | |
3117 | } | |
4758dcd1 | 3118 | ret = prepare_transfer(xhci, xhci->devs[slot_id], |
e9df17eb | 3119 | ep_index, urb->stream_id, |
3b72fca0 | 3120 | num_trbs, urb, 0, mem_flags); |
d2510342 | 3121 | if (unlikely(ret < 0)) |
4758dcd1 | 3122 | return ret; |
8e51adcc AX |
3123 | |
3124 | urb_priv = urb->hcpriv; | |
4758dcd1 RA |
3125 | |
3126 | /* Deal with URB_ZERO_PACKET - need one more td/trb */ | |
5a83f04a MN |
3127 | if (urb->transfer_flags & URB_ZERO_PACKET && urb_priv->length > 1) |
3128 | need_zero_pkt = true; | |
4758dcd1 | 3129 | |
8e51adcc AX |
3130 | td = urb_priv->td[0]; |
3131 | ||
8a96c052 SS |
3132 | /* |
3133 | * Don't give the first TRB to the hardware (by toggling the cycle bit) | |
3134 | * until we've finished creating all the other TRBs. The ring's cycle | |
3135 | * state may change as we enqueue the other TRBs, so save it too. | |
3136 | */ | |
5a5a0b1a MN |
3137 | start_trb = &ring->enqueue->generic; |
3138 | start_cycle = ring->cycle_state; | |
f9c589e1 | 3139 | send_addr = addr; |
8a96c052 | 3140 | |
d2510342 | 3141 | /* Queue the TRBs, even if they are zero-length */ |
0d2daade AB |
3142 | for (enqd_len = 0; first_trb || enqd_len < full_len; |
3143 | enqd_len += trb_buff_len) { | |
d2510342 | 3144 | field = TRB_TYPE(TRB_NORMAL); |
af8b9e63 | 3145 | |
86065c27 MN |
3146 | /* TRB buffer should not cross 64KB boundaries */ |
3147 | trb_buff_len = TRB_BUFF_LEN_UP_TO_BOUNDARY(addr); | |
3148 | trb_buff_len = min_t(unsigned int, trb_buff_len, block_len); | |
8a96c052 | 3149 | |
86065c27 MN |
3150 | if (enqd_len + trb_buff_len > full_len) |
3151 | trb_buff_len = full_len - enqd_len; | |
b10de142 SS |
3152 | |
3153 | /* Don't change the cycle bit of the first TRB until later */ | |
86065c27 MN |
3154 | if (first_trb) { |
3155 | first_trb = false; | |
50f7b52a | 3156 | if (start_cycle == 0) |
d2510342 | 3157 | field |= TRB_CYCLE; |
50f7b52a | 3158 | } else |
5a5a0b1a | 3159 | field |= ring->cycle_state; |
b10de142 SS |
3160 | |
3161 | /* Chain all the TRBs together; clear the chain bit in the last | |
3162 | * TRB to indicate it's the last TRB in the chain. | |
3163 | */ | |
86065c27 | 3164 | if (enqd_len + trb_buff_len < full_len) { |
b10de142 | 3165 | field |= TRB_CHAIN; |
2d98ef40 | 3166 | if (trb_is_link(ring->enqueue + 1)) { |
474ed23a | 3167 | if (xhci_align_td(xhci, urb, enqd_len, |
f9c589e1 MN |
3168 | &trb_buff_len, |
3169 | ring->enq_seg)) { | |
3170 | send_addr = ring->enq_seg->bounce_dma; | |
3171 | /* assuming TD won't span 2 segs */ | |
3172 | td->bounce_seg = ring->enq_seg; | |
3173 | } | |
474ed23a | 3174 | } |
f9c589e1 MN |
3175 | } |
3176 | if (enqd_len + trb_buff_len >= full_len) { | |
3177 | field &= ~TRB_CHAIN; | |
4758dcd1 | 3178 | field |= TRB_IOC; |
124c3937 | 3179 | more_trbs_coming = false; |
5a83f04a | 3180 | td->last_trb = ring->enqueue; |
b10de142 | 3181 | } |
af8b9e63 SS |
3182 | |
3183 | /* Only set interrupt on short packet for IN endpoints */ | |
3184 | if (usb_urb_dir_in(urb)) | |
3185 | field |= TRB_ISP; | |
3186 | ||
4da6e6f2 | 3187 | /* Set the TRB length, TD size, and interrupter fields. */ |
86065c27 MN |
3188 | remainder = xhci_td_remainder(xhci, enqd_len, trb_buff_len, |
3189 | full_len, urb, more_trbs_coming); | |
3190 | ||
f9dc68fe | 3191 | length_field = TRB_LEN(trb_buff_len) | |
c840d6ce | 3192 | TRB_TD_SIZE(remainder) | |
f9dc68fe | 3193 | TRB_INTR_TARGET(0); |
4da6e6f2 | 3194 | |
124c3937 | 3195 | queue_trb(xhci, ring, more_trbs_coming | need_zero_pkt, |
f9c589e1 MN |
3196 | lower_32_bits(send_addr), |
3197 | upper_32_bits(send_addr), | |
f9dc68fe | 3198 | length_field, |
d2510342 | 3199 | field); |
b10de142 | 3200 | |
b10de142 | 3201 | addr += trb_buff_len; |
f9c589e1 | 3202 | sent_len = trb_buff_len; |
d2510342 | 3203 | |
f9c589e1 | 3204 | while (sg && sent_len >= block_len) { |
86065c27 MN |
3205 | /* New sg entry */ |
3206 | --num_sgs; | |
f9c589e1 | 3207 | sent_len -= block_len; |
86065c27 | 3208 | if (num_sgs != 0) { |
d2510342 | 3209 | sg = sg_next(sg); |
86065c27 MN |
3210 | block_len = sg_dma_len(sg); |
3211 | addr = (u64) sg_dma_address(sg); | |
f9c589e1 | 3212 | addr += sent_len; |
d2510342 AI |
3213 | } |
3214 | } | |
f9c589e1 MN |
3215 | block_len -= sent_len; |
3216 | send_addr = addr; | |
d2510342 | 3217 | } |
b10de142 | 3218 | |
5a83f04a MN |
3219 | if (need_zero_pkt) { |
3220 | ret = prepare_transfer(xhci, xhci->devs[slot_id], | |
3221 | ep_index, urb->stream_id, | |
3222 | 1, urb, 1, mem_flags); | |
3223 | urb_priv->td[1]->last_trb = ring->enqueue; | |
3224 | field = TRB_TYPE(TRB_NORMAL) | ring->cycle_state | TRB_IOC; | |
3225 | queue_trb(xhci, ring, 0, 0, 0, TRB_INTR_TARGET(0), field); | |
3226 | } | |
3227 | ||
86065c27 | 3228 | check_trb_math(urb, enqd_len); |
e9df17eb | 3229 | giveback_first_trb(xhci, slot_id, ep_index, urb->stream_id, |
e1eab2e0 | 3230 | start_cycle, start_trb); |
b10de142 SS |
3231 | return 0; |
3232 | } | |
3233 | ||
d0e96f5a | 3234 | /* Caller must have locked xhci->lock */ |
23e3be11 | 3235 | int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags, |
d0e96f5a SS |
3236 | struct urb *urb, int slot_id, unsigned int ep_index) |
3237 | { | |
3238 | struct xhci_ring *ep_ring; | |
3239 | int num_trbs; | |
3240 | int ret; | |
3241 | struct usb_ctrlrequest *setup; | |
3242 | struct xhci_generic_trb *start_trb; | |
3243 | int start_cycle; | |
c840d6ce | 3244 | u32 field, length_field, remainder; |
8e51adcc | 3245 | struct urb_priv *urb_priv; |
d0e96f5a SS |
3246 | struct xhci_td *td; |
3247 | ||
e9df17eb SS |
3248 | ep_ring = xhci_urb_to_transfer_ring(xhci, urb); |
3249 | if (!ep_ring) | |
3250 | return -EINVAL; | |
d0e96f5a SS |
3251 | |
3252 | /* | |
3253 | * Need to copy setup packet into setup TRB, so we can't use the setup | |
3254 | * DMA address. | |
3255 | */ | |
3256 | if (!urb->setup_packet) | |
3257 | return -EINVAL; | |
3258 | ||
d0e96f5a SS |
3259 | /* 1 TRB for setup, 1 for status */ |
3260 | num_trbs = 2; | |
3261 | /* | |
3262 | * Don't need to check if we need additional event data and normal TRBs, | |
3263 | * since data in control transfers will never get bigger than 16MB | |
3264 | * XXX: can we get a buffer that crosses 64KB boundaries? | |
3265 | */ | |
3266 | if (urb->transfer_buffer_length > 0) | |
3267 | num_trbs++; | |
e9df17eb SS |
3268 | ret = prepare_transfer(xhci, xhci->devs[slot_id], |
3269 | ep_index, urb->stream_id, | |
3b72fca0 | 3270 | num_trbs, urb, 0, mem_flags); |
d0e96f5a SS |
3271 | if (ret < 0) |
3272 | return ret; | |
3273 | ||
8e51adcc AX |
3274 | urb_priv = urb->hcpriv; |
3275 | td = urb_priv->td[0]; | |
3276 | ||
d0e96f5a SS |
3277 | /* |
3278 | * Don't give the first TRB to the hardware (by toggling the cycle bit) | |
3279 | * until we've finished creating all the other TRBs. The ring's cycle | |
3280 | * state may change as we enqueue the other TRBs, so save it too. | |
3281 | */ | |
3282 | start_trb = &ep_ring->enqueue->generic; | |
3283 | start_cycle = ep_ring->cycle_state; | |
3284 | ||
3285 | /* Queue setup TRB - see section 6.4.1.2.1 */ | |
3286 | /* FIXME better way to translate setup_packet into two u32 fields? */ | |
3287 | setup = (struct usb_ctrlrequest *) urb->setup_packet; | |
50f7b52a AX |
3288 | field = 0; |
3289 | field |= TRB_IDT | TRB_TYPE(TRB_SETUP); | |
3290 | if (start_cycle == 0) | |
3291 | field |= 0x1; | |
b83cdc8f | 3292 | |
dca77945 | 3293 | /* xHCI 1.0/1.1 6.4.1.2.1: Transfer Type field */ |
0cbd4b34 | 3294 | if ((xhci->hci_version >= 0x100) || (xhci->quirks & XHCI_MTK_HOST)) { |
b83cdc8f AX |
3295 | if (urb->transfer_buffer_length > 0) { |
3296 | if (setup->bRequestType & USB_DIR_IN) | |
3297 | field |= TRB_TX_TYPE(TRB_DATA_IN); | |
3298 | else | |
3299 | field |= TRB_TX_TYPE(TRB_DATA_OUT); | |
3300 | } | |
3301 | } | |
3302 | ||
3b72fca0 | 3303 | queue_trb(xhci, ep_ring, true, |
28ccd296 ME |
3304 | setup->bRequestType | setup->bRequest << 8 | le16_to_cpu(setup->wValue) << 16, |
3305 | le16_to_cpu(setup->wIndex) | le16_to_cpu(setup->wLength) << 16, | |
3306 | TRB_LEN(8) | TRB_INTR_TARGET(0), | |
3307 | /* Immediate data in pointer */ | |
3308 | field); | |
d0e96f5a SS |
3309 | |
3310 | /* If there's data, queue data TRBs */ | |
af8b9e63 SS |
3311 | /* Only set interrupt on short packet for IN endpoints */ |
3312 | if (usb_urb_dir_in(urb)) | |
3313 | field = TRB_ISP | TRB_TYPE(TRB_DATA); | |
3314 | else | |
3315 | field = TRB_TYPE(TRB_DATA); | |
3316 | ||
c840d6ce MN |
3317 | remainder = xhci_td_remainder(xhci, 0, |
3318 | urb->transfer_buffer_length, | |
3319 | urb->transfer_buffer_length, | |
3320 | urb, 1); | |
3321 | ||
f9dc68fe | 3322 | length_field = TRB_LEN(urb->transfer_buffer_length) | |
c840d6ce | 3323 | TRB_TD_SIZE(remainder) | |
f9dc68fe | 3324 | TRB_INTR_TARGET(0); |
c840d6ce | 3325 | |
d0e96f5a SS |
3326 | if (urb->transfer_buffer_length > 0) { |
3327 | if (setup->bRequestType & USB_DIR_IN) | |
3328 | field |= TRB_DIR_IN; | |
3b72fca0 | 3329 | queue_trb(xhci, ep_ring, true, |
d0e96f5a SS |
3330 | lower_32_bits(urb->transfer_dma), |
3331 | upper_32_bits(urb->transfer_dma), | |
f9dc68fe | 3332 | length_field, |
af8b9e63 | 3333 | field | ep_ring->cycle_state); |
d0e96f5a SS |
3334 | } |
3335 | ||
3336 | /* Save the DMA address of the last TRB in the TD */ | |
3337 | td->last_trb = ep_ring->enqueue; | |
3338 | ||
3339 | /* Queue status TRB - see Table 7 and sections 4.11.2.2 and 6.4.1.2.3 */ | |
3340 | /* If the device sent data, the status stage is an OUT transfer */ | |
3341 | if (urb->transfer_buffer_length > 0 && setup->bRequestType & USB_DIR_IN) | |
3342 | field = 0; | |
3343 | else | |
3344 | field = TRB_DIR_IN; | |
3b72fca0 | 3345 | queue_trb(xhci, ep_ring, false, |
d0e96f5a SS |
3346 | 0, |
3347 | 0, | |
3348 | TRB_INTR_TARGET(0), | |
3349 | /* Event on completion */ | |
3350 | field | TRB_IOC | TRB_TYPE(TRB_STATUS) | ep_ring->cycle_state); | |
3351 | ||
e9df17eb | 3352 | giveback_first_trb(xhci, slot_id, ep_index, 0, |
e1eab2e0 | 3353 | start_cycle, start_trb); |
d0e96f5a SS |
3354 | return 0; |
3355 | } | |
3356 | ||
5cd43e33 SS |
3357 | /* |
3358 | * The transfer burst count field of the isochronous TRB defines the number of | |
3359 | * bursts that are required to move all packets in this TD. Only SuperSpeed | |
3360 | * devices can burst up to bMaxBurst number of packets per service interval. | |
3361 | * This field is zero based, meaning a value of zero in the field means one | |
3362 | * burst. Basically, for everything but SuperSpeed devices, this field will be | |
3363 | * zero. Only xHCI 1.0 host controllers support this field. | |
3364 | */ | |
3365 | static unsigned int xhci_get_burst_count(struct xhci_hcd *xhci, | |
5cd43e33 SS |
3366 | struct urb *urb, unsigned int total_packet_count) |
3367 | { | |
3368 | unsigned int max_burst; | |
3369 | ||
09c352ed | 3370 | if (xhci->hci_version < 0x100 || urb->dev->speed < USB_SPEED_SUPER) |
5cd43e33 SS |
3371 | return 0; |
3372 | ||
3373 | max_burst = urb->ep->ss_ep_comp.bMaxBurst; | |
3213b151 | 3374 | return DIV_ROUND_UP(total_packet_count, max_burst + 1) - 1; |
5cd43e33 SS |
3375 | } |
3376 | ||
b61d378f SS |
3377 | /* |
3378 | * Returns the number of packets in the last "burst" of packets. This field is | |
3379 | * valid for all speeds of devices. USB 2.0 devices can only do one "burst", so | |
3380 | * the last burst packet count is equal to the total number of packets in the | |
3381 | * TD. SuperSpeed endpoints can have up to 3 bursts. All but the last burst | |
3382 | * must contain (bMaxBurst + 1) number of packets, but the last burst can | |
3383 | * contain 1 to (bMaxBurst + 1) packets. | |
3384 | */ | |
3385 | static unsigned int xhci_get_last_burst_packet_count(struct xhci_hcd *xhci, | |
b61d378f SS |
3386 | struct urb *urb, unsigned int total_packet_count) |
3387 | { | |
3388 | unsigned int max_burst; | |
3389 | unsigned int residue; | |
3390 | ||
3391 | if (xhci->hci_version < 0x100) | |
3392 | return 0; | |
3393 | ||
09c352ed | 3394 | if (urb->dev->speed >= USB_SPEED_SUPER) { |
b61d378f SS |
3395 | /* bMaxBurst is zero based: 0 means 1 packet per burst */ |
3396 | max_burst = urb->ep->ss_ep_comp.bMaxBurst; | |
3397 | residue = total_packet_count % (max_burst + 1); | |
3398 | /* If residue is zero, the last burst contains (max_burst + 1) | |
3399 | * number of packets, but the TLBPC field is zero-based. | |
3400 | */ | |
3401 | if (residue == 0) | |
3402 | return max_burst; | |
3403 | return residue - 1; | |
b61d378f | 3404 | } |
09c352ed MN |
3405 | if (total_packet_count == 0) |
3406 | return 0; | |
3407 | return total_packet_count - 1; | |
b61d378f SS |
3408 | } |
3409 | ||
79b8094f LB |
3410 | /* |
3411 | * Calculates Frame ID field of the isochronous TRB identifies the | |
3412 | * target frame that the Interval associated with this Isochronous | |
3413 | * Transfer Descriptor will start on. Refer to 4.11.2.5 in 1.1 spec. | |
3414 | * | |
3415 | * Returns actual frame id on success, negative value on error. | |
3416 | */ | |
3417 | static int xhci_get_isoc_frame_id(struct xhci_hcd *xhci, | |
3418 | struct urb *urb, int index) | |
3419 | { | |
3420 | int start_frame, ist, ret = 0; | |
3421 | int start_frame_id, end_frame_id, current_frame_id; | |
3422 | ||
3423 | if (urb->dev->speed == USB_SPEED_LOW || | |
3424 | urb->dev->speed == USB_SPEED_FULL) | |
3425 | start_frame = urb->start_frame + index * urb->interval; | |
3426 | else | |
3427 | start_frame = (urb->start_frame + index * urb->interval) >> 3; | |
3428 | ||
3429 | /* Isochronous Scheduling Threshold (IST, bits 0~3 in HCSPARAMS2): | |
3430 | * | |
3431 | * If bit [3] of IST is cleared to '0', software can add a TRB no | |
3432 | * later than IST[2:0] Microframes before that TRB is scheduled to | |
3433 | * be executed. | |
3434 | * If bit [3] of IST is set to '1', software can add a TRB no later | |
3435 | * than IST[2:0] Frames before that TRB is scheduled to be executed. | |
3436 | */ | |
3437 | ist = HCS_IST(xhci->hcs_params2) & 0x7; | |
3438 | if (HCS_IST(xhci->hcs_params2) & (1 << 3)) | |
3439 | ist <<= 3; | |
3440 | ||
3441 | /* Software shall not schedule an Isoch TD with a Frame ID value that | |
3442 | * is less than the Start Frame ID or greater than the End Frame ID, | |
3443 | * where: | |
3444 | * | |
3445 | * End Frame ID = (Current MFINDEX register value + 895 ms.) MOD 2048 | |
3446 | * Start Frame ID = (Current MFINDEX register value + IST + 1) MOD 2048 | |
3447 | * | |
3448 | * Both the End Frame ID and Start Frame ID values are calculated | |
3449 | * in microframes. When software determines the valid Frame ID value; | |
3450 | * The End Frame ID value should be rounded down to the nearest Frame | |
3451 | * boundary, and the Start Frame ID value should be rounded up to the | |
3452 | * nearest Frame boundary. | |
3453 | */ | |
3454 | current_frame_id = readl(&xhci->run_regs->microframe_index); | |
3455 | start_frame_id = roundup(current_frame_id + ist + 1, 8); | |
3456 | end_frame_id = rounddown(current_frame_id + 895 * 8, 8); | |
3457 | ||
3458 | start_frame &= 0x7ff; | |
3459 | start_frame_id = (start_frame_id >> 3) & 0x7ff; | |
3460 | end_frame_id = (end_frame_id >> 3) & 0x7ff; | |
3461 | ||
3462 | xhci_dbg(xhci, "%s: index %d, reg 0x%x start_frame_id 0x%x, end_frame_id 0x%x, start_frame 0x%x\n", | |
3463 | __func__, index, readl(&xhci->run_regs->microframe_index), | |
3464 | start_frame_id, end_frame_id, start_frame); | |
3465 | ||
3466 | if (start_frame_id < end_frame_id) { | |
3467 | if (start_frame > end_frame_id || | |
3468 | start_frame < start_frame_id) | |
3469 | ret = -EINVAL; | |
3470 | } else if (start_frame_id > end_frame_id) { | |
3471 | if ((start_frame > end_frame_id && | |
3472 | start_frame < start_frame_id)) | |
3473 | ret = -EINVAL; | |
3474 | } else { | |
3475 | ret = -EINVAL; | |
3476 | } | |
3477 | ||
3478 | if (index == 0) { | |
3479 | if (ret == -EINVAL || start_frame == start_frame_id) { | |
3480 | start_frame = start_frame_id + 1; | |
3481 | if (urb->dev->speed == USB_SPEED_LOW || | |
3482 | urb->dev->speed == USB_SPEED_FULL) | |
3483 | urb->start_frame = start_frame; | |
3484 | else | |
3485 | urb->start_frame = start_frame << 3; | |
3486 | ret = 0; | |
3487 | } | |
3488 | } | |
3489 | ||
3490 | if (ret) { | |
3491 | xhci_warn(xhci, "Frame ID %d (reg %d, index %d) beyond range (%d, %d)\n", | |
3492 | start_frame, current_frame_id, index, | |
3493 | start_frame_id, end_frame_id); | |
3494 | xhci_warn(xhci, "Ignore frame ID field, use SIA bit instead\n"); | |
3495 | return ret; | |
3496 | } | |
3497 | ||
3498 | return start_frame; | |
3499 | } | |
3500 | ||
04e51901 AX |
3501 | /* This is for isoc transfer */ |
3502 | static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags, | |
3503 | struct urb *urb, int slot_id, unsigned int ep_index) | |
3504 | { | |
3505 | struct xhci_ring *ep_ring; | |
3506 | struct urb_priv *urb_priv; | |
3507 | struct xhci_td *td; | |
3508 | int num_tds, trbs_per_td; | |
3509 | struct xhci_generic_trb *start_trb; | |
3510 | bool first_trb; | |
3511 | int start_cycle; | |
3512 | u32 field, length_field; | |
3513 | int running_total, trb_buff_len, td_len, td_remain_len, ret; | |
3514 | u64 start_addr, addr; | |
3515 | int i, j; | |
47cbf692 | 3516 | bool more_trbs_coming; |
79b8094f | 3517 | struct xhci_virt_ep *xep; |
09c352ed | 3518 | int frame_id; |
04e51901 | 3519 | |
79b8094f | 3520 | xep = &xhci->devs[slot_id]->eps[ep_index]; |
04e51901 AX |
3521 | ep_ring = xhci->devs[slot_id]->eps[ep_index].ring; |
3522 | ||
3523 | num_tds = urb->number_of_packets; | |
3524 | if (num_tds < 1) { | |
3525 | xhci_dbg(xhci, "Isoc URB with zero packets?\n"); | |
3526 | return -EINVAL; | |
3527 | } | |
04e51901 AX |
3528 | start_addr = (u64) urb->transfer_dma; |
3529 | start_trb = &ep_ring->enqueue->generic; | |
3530 | start_cycle = ep_ring->cycle_state; | |
3531 | ||
522989a2 | 3532 | urb_priv = urb->hcpriv; |
09c352ed | 3533 | /* Queue the TRBs for each TD, even if they are zero-length */ |
04e51901 | 3534 | for (i = 0; i < num_tds; i++) { |
09c352ed MN |
3535 | unsigned int total_pkt_count, max_pkt; |
3536 | unsigned int burst_count, last_burst_pkt_count; | |
3537 | u32 sia_frame_id; | |
04e51901 | 3538 | |
4da6e6f2 | 3539 | first_trb = true; |
04e51901 AX |
3540 | running_total = 0; |
3541 | addr = start_addr + urb->iso_frame_desc[i].offset; | |
3542 | td_len = urb->iso_frame_desc[i].length; | |
3543 | td_remain_len = td_len; | |
09c352ed MN |
3544 | max_pkt = GET_MAX_PACKET(usb_endpoint_maxp(&urb->ep->desc)); |
3545 | total_pkt_count = DIV_ROUND_UP(td_len, max_pkt); | |
3546 | ||
48df4a6f | 3547 | /* A zero-length transfer still involves at least one packet. */ |
09c352ed MN |
3548 | if (total_pkt_count == 0) |
3549 | total_pkt_count++; | |
3550 | burst_count = xhci_get_burst_count(xhci, urb, total_pkt_count); | |
3551 | last_burst_pkt_count = xhci_get_last_burst_packet_count(xhci, | |
3552 | urb, total_pkt_count); | |
04e51901 | 3553 | |
d2510342 | 3554 | trbs_per_td = count_isoc_trbs_needed(urb, i); |
04e51901 AX |
3555 | |
3556 | ret = prepare_transfer(xhci, xhci->devs[slot_id], ep_index, | |
3b72fca0 | 3557 | urb->stream_id, trbs_per_td, urb, i, mem_flags); |
522989a2 SS |
3558 | if (ret < 0) { |
3559 | if (i == 0) | |
3560 | return ret; | |
3561 | goto cleanup; | |
3562 | } | |
04e51901 | 3563 | td = urb_priv->td[i]; |
09c352ed MN |
3564 | |
3565 | /* use SIA as default, if frame id is used overwrite it */ | |
3566 | sia_frame_id = TRB_SIA; | |
3567 | if (!(urb->transfer_flags & URB_ISO_ASAP) && | |
3568 | HCC_CFC(xhci->hcc_params)) { | |
3569 | frame_id = xhci_get_isoc_frame_id(xhci, urb, i); | |
3570 | if (frame_id >= 0) | |
3571 | sia_frame_id = TRB_FRAME_ID(frame_id); | |
3572 | } | |
3573 | /* | |
3574 | * Set isoc specific data for the first TRB in a TD. | |
3575 | * Prevent HW from getting the TRBs by keeping the cycle state | |
3576 | * inverted in the first TDs isoc TRB. | |
3577 | */ | |
2f6d3b65 | 3578 | field = TRB_TYPE(TRB_ISOC) | |
09c352ed MN |
3579 | TRB_TLBPC(last_burst_pkt_count) | |
3580 | sia_frame_id | | |
3581 | (i ? ep_ring->cycle_state : !start_cycle); | |
3582 | ||
2f6d3b65 MN |
3583 | /* xhci 1.1 with ETE uses TD_Size field for TBC, old is Rsvdz */ |
3584 | if (!xep->use_extended_tbc) | |
3585 | field |= TRB_TBC(burst_count); | |
3586 | ||
09c352ed | 3587 | /* fill the rest of the TRB fields, and remaining normal TRBs */ |
04e51901 AX |
3588 | for (j = 0; j < trbs_per_td; j++) { |
3589 | u32 remainder = 0; | |
09c352ed MN |
3590 | |
3591 | /* only first TRB is isoc, overwrite otherwise */ | |
3592 | if (!first_trb) | |
3593 | field = TRB_TYPE(TRB_NORMAL) | | |
3594 | ep_ring->cycle_state; | |
04e51901 | 3595 | |
af8b9e63 SS |
3596 | /* Only set interrupt on short packet for IN EPs */ |
3597 | if (usb_urb_dir_in(urb)) | |
3598 | field |= TRB_ISP; | |
3599 | ||
09c352ed | 3600 | /* Set the chain bit for all except the last TRB */ |
04e51901 | 3601 | if (j < trbs_per_td - 1) { |
47cbf692 | 3602 | more_trbs_coming = true; |
09c352ed | 3603 | field |= TRB_CHAIN; |
04e51901 | 3604 | } else { |
09c352ed | 3605 | more_trbs_coming = false; |
04e51901 AX |
3606 | td->last_trb = ep_ring->enqueue; |
3607 | field |= TRB_IOC; | |
09c352ed MN |
3608 | /* set BEI, except for the last TD */ |
3609 | if (xhci->hci_version >= 0x100 && | |
3610 | !(xhci->quirks & XHCI_AVOID_BEI) && | |
3611 | i < num_tds - 1) | |
3612 | field |= TRB_BEI; | |
04e51901 | 3613 | } |
04e51901 | 3614 | /* Calculate TRB length */ |
d2510342 | 3615 | trb_buff_len = TRB_BUFF_LEN_UP_TO_BOUNDARY(addr); |
04e51901 AX |
3616 | if (trb_buff_len > td_remain_len) |
3617 | trb_buff_len = td_remain_len; | |
3618 | ||
4da6e6f2 | 3619 | /* Set the TRB length, TD size, & interrupter fields. */ |
c840d6ce MN |
3620 | remainder = xhci_td_remainder(xhci, running_total, |
3621 | trb_buff_len, td_len, | |
124c3937 | 3622 | urb, more_trbs_coming); |
c840d6ce | 3623 | |
04e51901 | 3624 | length_field = TRB_LEN(trb_buff_len) | |
04e51901 | 3625 | TRB_INTR_TARGET(0); |
4da6e6f2 | 3626 | |
2f6d3b65 MN |
3627 | /* xhci 1.1 with ETE uses TD Size field for TBC */ |
3628 | if (first_trb && xep->use_extended_tbc) | |
3629 | length_field |= TRB_TD_SIZE_TBC(burst_count); | |
3630 | else | |
3631 | length_field |= TRB_TD_SIZE(remainder); | |
3632 | first_trb = false; | |
3633 | ||
3b72fca0 | 3634 | queue_trb(xhci, ep_ring, more_trbs_coming, |
04e51901 AX |
3635 | lower_32_bits(addr), |
3636 | upper_32_bits(addr), | |
3637 | length_field, | |
af8b9e63 | 3638 | field); |
04e51901 AX |
3639 | running_total += trb_buff_len; |
3640 | ||
3641 | addr += trb_buff_len; | |
3642 | td_remain_len -= trb_buff_len; | |
3643 | } | |
3644 | ||
3645 | /* Check TD length */ | |
3646 | if (running_total != td_len) { | |
3647 | xhci_err(xhci, "ISOC TD length unmatch\n"); | |
cf840551 AX |
3648 | ret = -EINVAL; |
3649 | goto cleanup; | |
04e51901 AX |
3650 | } |
3651 | } | |
3652 | ||
79b8094f LB |
3653 | /* store the next frame id */ |
3654 | if (HCC_CFC(xhci->hcc_params)) | |
3655 | xep->next_frame_id = urb->start_frame + num_tds * urb->interval; | |
3656 | ||
c41136b0 AX |
3657 | if (xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs == 0) { |
3658 | if (xhci->quirks & XHCI_AMD_PLL_FIX) | |
3659 | usb_amd_quirk_pll_disable(); | |
3660 | } | |
3661 | xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs++; | |
3662 | ||
e1eab2e0 AX |
3663 | giveback_first_trb(xhci, slot_id, ep_index, urb->stream_id, |
3664 | start_cycle, start_trb); | |
04e51901 | 3665 | return 0; |
522989a2 SS |
3666 | cleanup: |
3667 | /* Clean up a partially enqueued isoc transfer. */ | |
3668 | ||
3669 | for (i--; i >= 0; i--) | |
585df1d9 | 3670 | list_del_init(&urb_priv->td[i]->td_list); |
522989a2 SS |
3671 | |
3672 | /* Use the first TD as a temporary variable to turn the TDs we've queued | |
3673 | * into No-ops with a software-owned cycle bit. That way the hardware | |
3674 | * won't accidentally start executing bogus TDs when we partially | |
3675 | * overwrite them. td->first_trb and td->start_seg are already set. | |
3676 | */ | |
3677 | urb_priv->td[0]->last_trb = ep_ring->enqueue; | |
3678 | /* Every TRB except the first & last will have its cycle bit flipped. */ | |
3679 | td_to_noop(xhci, ep_ring, urb_priv->td[0], true); | |
3680 | ||
3681 | /* Reset the ring enqueue back to the first TRB and its cycle bit. */ | |
3682 | ep_ring->enqueue = urb_priv->td[0]->first_trb; | |
3683 | ep_ring->enq_seg = urb_priv->td[0]->start_seg; | |
3684 | ep_ring->cycle_state = start_cycle; | |
b008df60 | 3685 | ep_ring->num_trbs_free = ep_ring->num_trbs_free_temp; |
522989a2 SS |
3686 | usb_hcd_unlink_urb_from_ep(bus_to_hcd(urb->dev->bus), urb); |
3687 | return ret; | |
04e51901 AX |
3688 | } |
3689 | ||
3690 | /* | |
3691 | * Check transfer ring to guarantee there is enough room for the urb. | |
3692 | * Update ISO URB start_frame and interval. | |
79b8094f LB |
3693 | * Update interval as xhci_queue_intr_tx does. Use xhci frame_index to |
3694 | * update urb->start_frame if URB_ISO_ASAP is set in transfer_flags or | |
3695 | * Contiguous Frame ID is not supported by HC. | |
04e51901 AX |
3696 | */ |
3697 | int xhci_queue_isoc_tx_prepare(struct xhci_hcd *xhci, gfp_t mem_flags, | |
3698 | struct urb *urb, int slot_id, unsigned int ep_index) | |
3699 | { | |
3700 | struct xhci_virt_device *xdev; | |
3701 | struct xhci_ring *ep_ring; | |
3702 | struct xhci_ep_ctx *ep_ctx; | |
3703 | int start_frame; | |
04e51901 AX |
3704 | int num_tds, num_trbs, i; |
3705 | int ret; | |
79b8094f LB |
3706 | struct xhci_virt_ep *xep; |
3707 | int ist; | |
04e51901 AX |
3708 | |
3709 | xdev = xhci->devs[slot_id]; | |
79b8094f | 3710 | xep = &xhci->devs[slot_id]->eps[ep_index]; |
04e51901 AX |
3711 | ep_ring = xdev->eps[ep_index].ring; |
3712 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); | |
3713 | ||
3714 | num_trbs = 0; | |
3715 | num_tds = urb->number_of_packets; | |
3716 | for (i = 0; i < num_tds; i++) | |
d2510342 | 3717 | num_trbs += count_isoc_trbs_needed(urb, i); |
04e51901 AX |
3718 | |
3719 | /* Check the ring to guarantee there is enough room for the whole urb. | |
3720 | * Do not insert any td of the urb to the ring if the check failed. | |
3721 | */ | |
28ccd296 | 3722 | ret = prepare_ring(xhci, ep_ring, le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK, |
3b72fca0 | 3723 | num_trbs, mem_flags); |
04e51901 AX |
3724 | if (ret) |
3725 | return ret; | |
3726 | ||
79b8094f LB |
3727 | /* |
3728 | * Check interval value. This should be done before we start to | |
3729 | * calculate the start frame value. | |
3730 | */ | |
78140156 | 3731 | check_interval(xhci, urb, ep_ctx); |
79b8094f LB |
3732 | |
3733 | /* Calculate the start frame and put it in urb->start_frame. */ | |
42df7215 LB |
3734 | if (HCC_CFC(xhci->hcc_params) && !list_empty(&ep_ring->td_list)) { |
3735 | if ((le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK) == | |
3736 | EP_STATE_RUNNING) { | |
3737 | urb->start_frame = xep->next_frame_id; | |
3738 | goto skip_start_over; | |
3739 | } | |
79b8094f LB |
3740 | } |
3741 | ||
3742 | start_frame = readl(&xhci->run_regs->microframe_index); | |
3743 | start_frame &= 0x3fff; | |
3744 | /* | |
3745 | * Round up to the next frame and consider the time before trb really | |
3746 | * gets scheduled by hardare. | |
3747 | */ | |
3748 | ist = HCS_IST(xhci->hcs_params2) & 0x7; | |
3749 | if (HCS_IST(xhci->hcs_params2) & (1 << 3)) | |
3750 | ist <<= 3; | |
3751 | start_frame += ist + XHCI_CFC_DELAY; | |
3752 | start_frame = roundup(start_frame, 8); | |
3753 | ||
3754 | /* | |
3755 | * Round up to the next ESIT (Endpoint Service Interval Time) if ESIT | |
3756 | * is greate than 8 microframes. | |
3757 | */ | |
3758 | if (urb->dev->speed == USB_SPEED_LOW || | |
3759 | urb->dev->speed == USB_SPEED_FULL) { | |
3760 | start_frame = roundup(start_frame, urb->interval << 3); | |
3761 | urb->start_frame = start_frame >> 3; | |
3762 | } else { | |
3763 | start_frame = roundup(start_frame, urb->interval); | |
3764 | urb->start_frame = start_frame; | |
3765 | } | |
3766 | ||
3767 | skip_start_over: | |
b008df60 AX |
3768 | ep_ring->num_trbs_free_temp = ep_ring->num_trbs_free; |
3769 | ||
3fc8206d | 3770 | return xhci_queue_isoc_tx(xhci, mem_flags, urb, slot_id, ep_index); |
04e51901 AX |
3771 | } |
3772 | ||
d0e96f5a SS |
3773 | /**** Command Ring Operations ****/ |
3774 | ||
913a8a34 SS |
3775 | /* Generic function for queueing a command TRB on the command ring. |
3776 | * Check to make sure there's room on the command ring for one command TRB. | |
3777 | * Also check that there's room reserved for commands that must not fail. | |
3778 | * If this is a command that must not fail, meaning command_must_succeed = TRUE, | |
3779 | * then only check for the number of reserved spots. | |
3780 | * Don't decrement xhci->cmd_ring_reserved_trbs after we've queued the TRB | |
3781 | * because the command event handler may want to resubmit a failed command. | |
3782 | */ | |
ddba5cd0 MN |
3783 | static int queue_command(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3784 | u32 field1, u32 field2, | |
3785 | u32 field3, u32 field4, bool command_must_succeed) | |
7f84eef0 | 3786 | { |
913a8a34 | 3787 | int reserved_trbs = xhci->cmd_ring_reserved_trbs; |
d1dc908a | 3788 | int ret; |
ad6b1d91 | 3789 | |
98d74f9c MN |
3790 | if ((xhci->xhc_state & XHCI_STATE_DYING) || |
3791 | (xhci->xhc_state & XHCI_STATE_HALTED)) { | |
ad6b1d91 | 3792 | xhci_dbg(xhci, "xHCI dying or halted, can't queue_command\n"); |
c9aa1a2d | 3793 | return -ESHUTDOWN; |
ad6b1d91 | 3794 | } |
d1dc908a | 3795 | |
913a8a34 SS |
3796 | if (!command_must_succeed) |
3797 | reserved_trbs++; | |
3798 | ||
d1dc908a | 3799 | ret = prepare_ring(xhci, xhci->cmd_ring, EP_STATE_RUNNING, |
3b72fca0 | 3800 | reserved_trbs, GFP_ATOMIC); |
d1dc908a SS |
3801 | if (ret < 0) { |
3802 | xhci_err(xhci, "ERR: No room for command on command ring\n"); | |
913a8a34 SS |
3803 | if (command_must_succeed) |
3804 | xhci_err(xhci, "ERR: Reserved TRB counting for " | |
3805 | "unfailable commands failed.\n"); | |
d1dc908a | 3806 | return ret; |
7f84eef0 | 3807 | } |
c9aa1a2d MN |
3808 | |
3809 | cmd->command_trb = xhci->cmd_ring->enqueue; | |
3810 | list_add_tail(&cmd->cmd_list, &xhci->cmd_list); | |
ddba5cd0 | 3811 | |
c311e391 MN |
3812 | /* if there are no other commands queued we start the timeout timer */ |
3813 | if (xhci->cmd_list.next == &cmd->cmd_list && | |
3814 | !timer_pending(&xhci->cmd_timer)) { | |
3815 | xhci->current_cmd = cmd; | |
3816 | mod_timer(&xhci->cmd_timer, jiffies + XHCI_CMD_DEFAULT_TIMEOUT); | |
3817 | } | |
3818 | ||
3b72fca0 AX |
3819 | queue_trb(xhci, xhci->cmd_ring, false, field1, field2, field3, |
3820 | field4 | xhci->cmd_ring->cycle_state); | |
7f84eef0 SS |
3821 | return 0; |
3822 | } | |
3823 | ||
3ffbba95 | 3824 | /* Queue a slot enable or disable request on the command ring */ |
ddba5cd0 MN |
3825 | int xhci_queue_slot_control(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3826 | u32 trb_type, u32 slot_id) | |
3ffbba95 | 3827 | { |
ddba5cd0 | 3828 | return queue_command(xhci, cmd, 0, 0, 0, |
913a8a34 | 3829 | TRB_TYPE(trb_type) | SLOT_ID_FOR_TRB(slot_id), false); |
3ffbba95 SS |
3830 | } |
3831 | ||
3832 | /* Queue an address device command TRB */ | |
ddba5cd0 MN |
3833 | int xhci_queue_address_device(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3834 | dma_addr_t in_ctx_ptr, u32 slot_id, enum xhci_setup_dev setup) | |
3ffbba95 | 3835 | { |
ddba5cd0 | 3836 | return queue_command(xhci, cmd, lower_32_bits(in_ctx_ptr), |
8e595a5d | 3837 | upper_32_bits(in_ctx_ptr), 0, |
48fc7dbd DW |
3838 | TRB_TYPE(TRB_ADDR_DEV) | SLOT_ID_FOR_TRB(slot_id) |
3839 | | (setup == SETUP_CONTEXT_ONLY ? TRB_BSR : 0), false); | |
2a8f82c4 SS |
3840 | } |
3841 | ||
ddba5cd0 | 3842 | int xhci_queue_vendor_command(struct xhci_hcd *xhci, struct xhci_command *cmd, |
0238634d SS |
3843 | u32 field1, u32 field2, u32 field3, u32 field4) |
3844 | { | |
ddba5cd0 | 3845 | return queue_command(xhci, cmd, field1, field2, field3, field4, false); |
0238634d SS |
3846 | } |
3847 | ||
2a8f82c4 | 3848 | /* Queue a reset device command TRB */ |
ddba5cd0 MN |
3849 | int xhci_queue_reset_device(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3850 | u32 slot_id) | |
2a8f82c4 | 3851 | { |
ddba5cd0 | 3852 | return queue_command(xhci, cmd, 0, 0, 0, |
2a8f82c4 | 3853 | TRB_TYPE(TRB_RESET_DEV) | SLOT_ID_FOR_TRB(slot_id), |
913a8a34 | 3854 | false); |
3ffbba95 | 3855 | } |
f94e0186 SS |
3856 | |
3857 | /* Queue a configure endpoint command TRB */ | |
ddba5cd0 MN |
3858 | int xhci_queue_configure_endpoint(struct xhci_hcd *xhci, |
3859 | struct xhci_command *cmd, dma_addr_t in_ctx_ptr, | |
913a8a34 | 3860 | u32 slot_id, bool command_must_succeed) |
f94e0186 | 3861 | { |
ddba5cd0 | 3862 | return queue_command(xhci, cmd, lower_32_bits(in_ctx_ptr), |
8e595a5d | 3863 | upper_32_bits(in_ctx_ptr), 0, |
913a8a34 SS |
3864 | TRB_TYPE(TRB_CONFIG_EP) | SLOT_ID_FOR_TRB(slot_id), |
3865 | command_must_succeed); | |
f94e0186 | 3866 | } |
ae636747 | 3867 | |
f2217e8e | 3868 | /* Queue an evaluate context command TRB */ |
ddba5cd0 MN |
3869 | int xhci_queue_evaluate_context(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3870 | dma_addr_t in_ctx_ptr, u32 slot_id, bool command_must_succeed) | |
f2217e8e | 3871 | { |
ddba5cd0 | 3872 | return queue_command(xhci, cmd, lower_32_bits(in_ctx_ptr), |
f2217e8e | 3873 | upper_32_bits(in_ctx_ptr), 0, |
913a8a34 | 3874 | TRB_TYPE(TRB_EVAL_CONTEXT) | SLOT_ID_FOR_TRB(slot_id), |
4b266541 | 3875 | command_must_succeed); |
f2217e8e SS |
3876 | } |
3877 | ||
be88fe4f AX |
3878 | /* |
3879 | * Suspend is set to indicate "Stop Endpoint Command" is being issued to stop | |
3880 | * activity on an endpoint that is about to be suspended. | |
3881 | */ | |
ddba5cd0 MN |
3882 | int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3883 | int slot_id, unsigned int ep_index, int suspend) | |
ae636747 SS |
3884 | { |
3885 | u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id); | |
3886 | u32 trb_ep_index = EP_ID_FOR_TRB(ep_index); | |
3887 | u32 type = TRB_TYPE(TRB_STOP_RING); | |
be88fe4f | 3888 | u32 trb_suspend = SUSPEND_PORT_FOR_TRB(suspend); |
ae636747 | 3889 | |
ddba5cd0 | 3890 | return queue_command(xhci, cmd, 0, 0, 0, |
be88fe4f | 3891 | trb_slot_id | trb_ep_index | type | trb_suspend, false); |
ae636747 SS |
3892 | } |
3893 | ||
d3a43e66 HG |
3894 | /* Set Transfer Ring Dequeue Pointer command */ |
3895 | void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci, | |
3896 | unsigned int slot_id, unsigned int ep_index, | |
3897 | unsigned int stream_id, | |
3898 | struct xhci_dequeue_state *deq_state) | |
ae636747 SS |
3899 | { |
3900 | dma_addr_t addr; | |
3901 | u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id); | |
3902 | u32 trb_ep_index = EP_ID_FOR_TRB(ep_index); | |
e9df17eb | 3903 | u32 trb_stream_id = STREAM_ID_FOR_TRB(stream_id); |
95241dbd | 3904 | u32 trb_sct = 0; |
ae636747 | 3905 | u32 type = TRB_TYPE(TRB_SET_DEQ); |
bf161e85 | 3906 | struct xhci_virt_ep *ep; |
1e3452e3 HG |
3907 | struct xhci_command *cmd; |
3908 | int ret; | |
ae636747 | 3909 | |
d3a43e66 HG |
3910 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
3911 | "Set TR Deq Ptr cmd, new deq seg = %p (0x%llx dma), new deq ptr = %p (0x%llx dma), new cycle = %u", | |
3912 | deq_state->new_deq_seg, | |
3913 | (unsigned long long)deq_state->new_deq_seg->dma, | |
3914 | deq_state->new_deq_ptr, | |
3915 | (unsigned long long)xhci_trb_virt_to_dma( | |
3916 | deq_state->new_deq_seg, deq_state->new_deq_ptr), | |
3917 | deq_state->new_cycle_state); | |
3918 | ||
3919 | addr = xhci_trb_virt_to_dma(deq_state->new_deq_seg, | |
3920 | deq_state->new_deq_ptr); | |
c92bcfa7 | 3921 | if (addr == 0) { |
ae636747 | 3922 | xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n"); |
700e2052 | 3923 | xhci_warn(xhci, "WARN deq seg = %p, deq pt = %p\n", |
d3a43e66 HG |
3924 | deq_state->new_deq_seg, deq_state->new_deq_ptr); |
3925 | return; | |
c92bcfa7 | 3926 | } |
bf161e85 SS |
3927 | ep = &xhci->devs[slot_id]->eps[ep_index]; |
3928 | if ((ep->ep_state & SET_DEQ_PENDING)) { | |
3929 | xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n"); | |
3930 | xhci_warn(xhci, "A Set TR Deq Ptr command is pending.\n"); | |
d3a43e66 | 3931 | return; |
bf161e85 | 3932 | } |
1e3452e3 HG |
3933 | |
3934 | /* This function gets called from contexts where it cannot sleep */ | |
3935 | cmd = xhci_alloc_command(xhci, false, false, GFP_ATOMIC); | |
3936 | if (!cmd) { | |
3937 | xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr: ENOMEM\n"); | |
d3a43e66 | 3938 | return; |
1e3452e3 HG |
3939 | } |
3940 | ||
d3a43e66 HG |
3941 | ep->queued_deq_seg = deq_state->new_deq_seg; |
3942 | ep->queued_deq_ptr = deq_state->new_deq_ptr; | |
95241dbd HG |
3943 | if (stream_id) |
3944 | trb_sct = SCT_FOR_TRB(SCT_PRI_TR); | |
1e3452e3 | 3945 | ret = queue_command(xhci, cmd, |
d3a43e66 HG |
3946 | lower_32_bits(addr) | trb_sct | deq_state->new_cycle_state, |
3947 | upper_32_bits(addr), trb_stream_id, | |
3948 | trb_slot_id | trb_ep_index | type, false); | |
1e3452e3 HG |
3949 | if (ret < 0) { |
3950 | xhci_free_command(xhci, cmd); | |
d3a43e66 | 3951 | return; |
1e3452e3 HG |
3952 | } |
3953 | ||
d3a43e66 HG |
3954 | /* Stop the TD queueing code from ringing the doorbell until |
3955 | * this command completes. The HC won't set the dequeue pointer | |
3956 | * if the ring is running, and ringing the doorbell starts the | |
3957 | * ring running. | |
3958 | */ | |
3959 | ep->ep_state |= SET_DEQ_PENDING; | |
ae636747 | 3960 | } |
a1587d97 | 3961 | |
ddba5cd0 MN |
3962 | int xhci_queue_reset_ep(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3963 | int slot_id, unsigned int ep_index) | |
a1587d97 SS |
3964 | { |
3965 | u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id); | |
3966 | u32 trb_ep_index = EP_ID_FOR_TRB(ep_index); | |
3967 | u32 type = TRB_TYPE(TRB_RESET_EP); | |
3968 | ||
ddba5cd0 MN |
3969 | return queue_command(xhci, cmd, 0, 0, 0, |
3970 | trb_slot_id | trb_ep_index | type, false); | |
a1587d97 | 3971 | } |