Commit | Line | Data |
---|---|---|
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 | ||
2d98ef40 MN |
92 | static bool trb_is_link(union xhci_trb *trb) |
93 | { | |
94 | return TRB_TYPE_LINK_LE32(trb->link.control); | |
95 | } | |
96 | ||
bd5e67f5 MN |
97 | static bool last_trb_on_seg(struct xhci_segment *seg, union xhci_trb *trb) |
98 | { | |
99 | return trb == &seg->trbs[TRBS_PER_SEGMENT - 1]; | |
100 | } | |
101 | ||
102 | static bool last_trb_on_ring(struct xhci_ring *ring, | |
103 | struct xhci_segment *seg, union xhci_trb *trb) | |
104 | { | |
105 | return last_trb_on_seg(seg, trb) && (seg->next == ring->first_seg); | |
106 | } | |
107 | ||
d0c77d84 MN |
108 | static bool link_trb_toggles_cycle(union xhci_trb *trb) |
109 | { | |
110 | return le32_to_cpu(trb->link.control) & LINK_TOGGLE; | |
111 | } | |
112 | ||
ae636747 SS |
113 | /* Updates trb to point to the next TRB in the ring, and updates seg if the next |
114 | * TRB is in a new segment. This does not skip over link TRBs, and it does not | |
115 | * effect the ring dequeue or enqueue pointers. | |
116 | */ | |
117 | static void next_trb(struct xhci_hcd *xhci, | |
118 | struct xhci_ring *ring, | |
119 | struct xhci_segment **seg, | |
120 | union xhci_trb **trb) | |
121 | { | |
2d98ef40 | 122 | if (trb_is_link(*trb)) { |
ae636747 SS |
123 | *seg = (*seg)->next; |
124 | *trb = ((*seg)->trbs); | |
125 | } else { | |
a1669b2c | 126 | (*trb)++; |
ae636747 SS |
127 | } |
128 | } | |
129 | ||
7f84eef0 SS |
130 | /* |
131 | * See Cycle bit rules. SW is the consumer for the event ring only. | |
132 | * Don't make a ring full of link TRBs. That would be dumb and this would loop. | |
133 | */ | |
3b72fca0 | 134 | static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring) |
7f84eef0 | 135 | { |
7f84eef0 | 136 | ring->deq_updates++; |
b008df60 | 137 | |
bd5e67f5 MN |
138 | /* event ring doesn't have link trbs, check for last trb */ |
139 | if (ring->type == TYPE_EVENT) { | |
140 | if (!last_trb_on_seg(ring->deq_seg, ring->dequeue)) { | |
50d0206f | 141 | ring->dequeue++; |
bd5e67f5 | 142 | return; |
7f84eef0 | 143 | } |
bd5e67f5 MN |
144 | if (last_trb_on_ring(ring, ring->deq_seg, ring->dequeue)) |
145 | ring->cycle_state ^= 1; | |
146 | ring->deq_seg = ring->deq_seg->next; | |
147 | ring->dequeue = ring->deq_seg->trbs; | |
148 | return; | |
149 | } | |
150 | ||
151 | /* All other rings have link trbs */ | |
152 | if (!trb_is_link(ring->dequeue)) { | |
153 | ring->dequeue++; | |
154 | ring->num_trbs_free++; | |
155 | } | |
156 | while (trb_is_link(ring->dequeue)) { | |
157 | ring->deq_seg = ring->deq_seg->next; | |
158 | ring->dequeue = ring->deq_seg->trbs; | |
159 | } | |
160 | return; | |
7f84eef0 SS |
161 | } |
162 | ||
163 | /* | |
164 | * See Cycle bit rules. SW is the consumer for the event ring only. | |
165 | * Don't make a ring full of link TRBs. That would be dumb and this would loop. | |
166 | * | |
167 | * If we've just enqueued a TRB that is in the middle of a TD (meaning the | |
168 | * chain bit is set), then set the chain bit in all the following link TRBs. | |
169 | * If we've enqueued the last TRB in a TD, make sure the following link TRBs | |
170 | * have their chain bit cleared (so that each Link TRB is a separate TD). | |
171 | * | |
172 | * Section 6.4.4.1 of the 0.95 spec says link TRBs cannot have the chain bit | |
b0567b3f SS |
173 | * set, but other sections talk about dealing with the chain bit set. This was |
174 | * fixed in the 0.96 specification errata, but we have to assume that all 0.95 | |
175 | * xHCI hardware can't handle the chain bit being cleared on a link TRB. | |
6cc30d85 SS |
176 | * |
177 | * @more_trbs_coming: Will you enqueue more TRBs before calling | |
178 | * prepare_transfer()? | |
7f84eef0 | 179 | */ |
6cc30d85 | 180 | static void inc_enq(struct xhci_hcd *xhci, struct xhci_ring *ring, |
3b72fca0 | 181 | bool more_trbs_coming) |
7f84eef0 SS |
182 | { |
183 | u32 chain; | |
184 | union xhci_trb *next; | |
185 | ||
28ccd296 | 186 | chain = le32_to_cpu(ring->enqueue->generic.field[3]) & TRB_CHAIN; |
b008df60 | 187 | /* If this is not event ring, there is one less usable TRB */ |
2d98ef40 | 188 | if (!trb_is_link(ring->enqueue)) |
b008df60 | 189 | ring->num_trbs_free--; |
7f84eef0 SS |
190 | next = ++(ring->enqueue); |
191 | ||
192 | ring->enq_updates++; | |
2251198b | 193 | /* Update the dequeue pointer further if that was a link TRB */ |
2d98ef40 | 194 | while (trb_is_link(next)) { |
6cc30d85 | 195 | |
2251198b MN |
196 | /* |
197 | * If the caller doesn't plan on enqueueing more TDs before | |
198 | * ringing the doorbell, then we don't want to give the link TRB | |
199 | * to the hardware just yet. We'll give the link TRB back in | |
200 | * prepare_ring() just before we enqueue the TD at the top of | |
201 | * the ring. | |
202 | */ | |
203 | if (!chain && !more_trbs_coming) | |
204 | break; | |
3b72fca0 | 205 | |
2251198b MN |
206 | /* If we're not dealing with 0.95 hardware or isoc rings on |
207 | * AMD 0.96 host, carry over the chain bit of the previous TRB | |
208 | * (which may mean the chain bit is cleared). | |
209 | */ | |
210 | if (!(ring->type == TYPE_ISOC && | |
211 | (xhci->quirks & XHCI_AMD_0x96_HOST)) && | |
212 | !xhci_link_trb_quirk(xhci)) { | |
213 | next->link.control &= cpu_to_le32(~TRB_CHAIN); | |
214 | next->link.control |= cpu_to_le32(chain); | |
7f84eef0 | 215 | } |
2251198b MN |
216 | /* Give this link TRB to the hardware */ |
217 | wmb(); | |
218 | next->link.control ^= cpu_to_le32(TRB_CYCLE); | |
219 | ||
220 | /* Toggle the cycle bit after the last ring segment. */ | |
d0c77d84 | 221 | if (link_trb_toggles_cycle(next)) |
2251198b MN |
222 | ring->cycle_state ^= 1; |
223 | ||
7f84eef0 SS |
224 | ring->enq_seg = ring->enq_seg->next; |
225 | ring->enqueue = ring->enq_seg->trbs; | |
226 | next = ring->enqueue; | |
227 | } | |
228 | } | |
229 | ||
230 | /* | |
085deb16 AX |
231 | * Check to see if there's room to enqueue num_trbs on the ring and make sure |
232 | * enqueue pointer will not advance into dequeue segment. See rules above. | |
7f84eef0 | 233 | */ |
b008df60 | 234 | static inline int room_on_ring(struct xhci_hcd *xhci, struct xhci_ring *ring, |
7f84eef0 SS |
235 | unsigned int num_trbs) |
236 | { | |
085deb16 | 237 | int num_trbs_in_deq_seg; |
b008df60 | 238 | |
085deb16 AX |
239 | if (ring->num_trbs_free < num_trbs) |
240 | return 0; | |
241 | ||
242 | if (ring->type != TYPE_COMMAND && ring->type != TYPE_EVENT) { | |
243 | num_trbs_in_deq_seg = ring->dequeue - ring->deq_seg->trbs; | |
244 | if (ring->num_trbs_free < num_trbs + num_trbs_in_deq_seg) | |
245 | return 0; | |
246 | } | |
247 | ||
248 | return 1; | |
7f84eef0 SS |
249 | } |
250 | ||
7f84eef0 | 251 | /* Ring the host controller doorbell after placing a command on the ring */ |
23e3be11 | 252 | void xhci_ring_cmd_db(struct xhci_hcd *xhci) |
7f84eef0 | 253 | { |
c181bc5b EF |
254 | if (!(xhci->cmd_ring_state & CMD_RING_STATE_RUNNING)) |
255 | return; | |
256 | ||
7f84eef0 | 257 | xhci_dbg(xhci, "// Ding dong!\n"); |
204b7793 | 258 | writel(DB_VALUE_HOST, &xhci->dba->doorbell[0]); |
7f84eef0 | 259 | /* Flush PCI posted writes */ |
b0ba9720 | 260 | readl(&xhci->dba->doorbell[0]); |
7f84eef0 SS |
261 | } |
262 | ||
b92cc66c EF |
263 | static int xhci_abort_cmd_ring(struct xhci_hcd *xhci) |
264 | { | |
265 | u64 temp_64; | |
266 | int ret; | |
267 | ||
268 | xhci_dbg(xhci, "Abort command ring\n"); | |
269 | ||
f7b2e403 | 270 | temp_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); |
b92cc66c | 271 | xhci->cmd_ring_state = CMD_RING_STATE_ABORTED; |
3425aa03 MN |
272 | |
273 | /* | |
274 | * Writing the CMD_RING_ABORT bit should cause a cmd completion event, | |
275 | * however on some host hw the CMD_RING_RUNNING bit is correctly cleared | |
276 | * but the completion event in never sent. Use the cmd timeout timer to | |
277 | * handle those cases. Use twice the time to cover the bit polling retry | |
278 | */ | |
279 | mod_timer(&xhci->cmd_timer, jiffies + (2 * XHCI_CMD_DEFAULT_TIMEOUT)); | |
477632df SS |
280 | xhci_write_64(xhci, temp_64 | CMD_RING_ABORT, |
281 | &xhci->op_regs->cmd_ring); | |
b92cc66c EF |
282 | |
283 | /* Section 4.6.1.2 of xHCI 1.0 spec says software should | |
284 | * time the completion od all xHCI commands, including | |
285 | * the Command Abort operation. If software doesn't see | |
286 | * CRR negated in a timely manner (e.g. longer than 5 | |
287 | * seconds), then it should assume that the there are | |
288 | * larger problems with the xHC and assert HCRST. | |
289 | */ | |
dc0b177c | 290 | ret = xhci_handshake(&xhci->op_regs->cmd_ring, |
b92cc66c EF |
291 | CMD_RING_RUNNING, 0, 5 * 1000 * 1000); |
292 | if (ret < 0) { | |
a6809ffd MN |
293 | /* we are about to kill xhci, give it one more chance */ |
294 | xhci_write_64(xhci, temp_64 | CMD_RING_ABORT, | |
295 | &xhci->op_regs->cmd_ring); | |
296 | udelay(1000); | |
297 | ret = xhci_handshake(&xhci->op_regs->cmd_ring, | |
298 | CMD_RING_RUNNING, 0, 3 * 1000 * 1000); | |
299 | if (ret == 0) | |
300 | return 0; | |
301 | ||
b92cc66c EF |
302 | xhci_err(xhci, "Stopped the command ring failed, " |
303 | "maybe the host is dead\n"); | |
3425aa03 | 304 | del_timer(&xhci->cmd_timer); |
b92cc66c EF |
305 | xhci->xhc_state |= XHCI_STATE_DYING; |
306 | xhci_quiesce(xhci); | |
307 | xhci_halt(xhci); | |
308 | return -ESHUTDOWN; | |
309 | } | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
be88fe4f | 314 | void xhci_ring_ep_doorbell(struct xhci_hcd *xhci, |
ae636747 | 315 | unsigned int slot_id, |
e9df17eb SS |
316 | unsigned int ep_index, |
317 | unsigned int stream_id) | |
ae636747 | 318 | { |
28ccd296 | 319 | __le32 __iomem *db_addr = &xhci->dba->doorbell[slot_id]; |
50d64676 MW |
320 | struct xhci_virt_ep *ep = &xhci->devs[slot_id]->eps[ep_index]; |
321 | unsigned int ep_state = ep->ep_state; | |
ae636747 | 322 | |
ae636747 | 323 | /* Don't ring the doorbell for this endpoint if there are pending |
50d64676 | 324 | * cancellations because we don't want to interrupt processing. |
8df75f42 SS |
325 | * We don't want to restart any stream rings if there's a set dequeue |
326 | * pointer command pending because the device can choose to start any | |
327 | * stream once the endpoint is on the HW schedule. | |
ae636747 | 328 | */ |
50d64676 MW |
329 | if ((ep_state & EP_HALT_PENDING) || (ep_state & SET_DEQ_PENDING) || |
330 | (ep_state & EP_HALTED)) | |
331 | return; | |
204b7793 | 332 | writel(DB_VALUE(ep_index, stream_id), db_addr); |
50d64676 MW |
333 | /* The CPU has better things to do at this point than wait for a |
334 | * write-posting flush. It'll get there soon enough. | |
335 | */ | |
ae636747 SS |
336 | } |
337 | ||
e9df17eb SS |
338 | /* Ring the doorbell for any rings with pending URBs */ |
339 | static void ring_doorbell_for_active_rings(struct xhci_hcd *xhci, | |
340 | unsigned int slot_id, | |
341 | unsigned int ep_index) | |
342 | { | |
343 | unsigned int stream_id; | |
344 | struct xhci_virt_ep *ep; | |
345 | ||
346 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
347 | ||
348 | /* A ring has pending URBs if its TD list is not empty */ | |
349 | if (!(ep->ep_state & EP_HAS_STREAMS)) { | |
d66eaf9f | 350 | if (ep->ring && !(list_empty(&ep->ring->td_list))) |
be88fe4f | 351 | xhci_ring_ep_doorbell(xhci, slot_id, ep_index, 0); |
e9df17eb SS |
352 | return; |
353 | } | |
354 | ||
355 | for (stream_id = 1; stream_id < ep->stream_info->num_streams; | |
356 | stream_id++) { | |
357 | struct xhci_stream_info *stream_info = ep->stream_info; | |
358 | if (!list_empty(&stream_info->stream_rings[stream_id]->td_list)) | |
be88fe4f AX |
359 | xhci_ring_ep_doorbell(xhci, slot_id, ep_index, |
360 | stream_id); | |
e9df17eb SS |
361 | } |
362 | } | |
363 | ||
75b040ec AI |
364 | /* Get the right ring for the given slot_id, ep_index and stream_id. |
365 | * If the endpoint supports streams, boundary check the URB's stream ID. | |
366 | * If the endpoint doesn't support streams, return the singular endpoint ring. | |
367 | */ | |
368 | struct xhci_ring *xhci_triad_to_transfer_ring(struct xhci_hcd *xhci, | |
021bff91 SS |
369 | unsigned int slot_id, unsigned int ep_index, |
370 | unsigned int stream_id) | |
371 | { | |
372 | struct xhci_virt_ep *ep; | |
373 | ||
374 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
375 | /* Common case: no streams */ | |
376 | if (!(ep->ep_state & EP_HAS_STREAMS)) | |
377 | return ep->ring; | |
378 | ||
379 | if (stream_id == 0) { | |
380 | xhci_warn(xhci, | |
381 | "WARN: Slot ID %u, ep index %u has streams, " | |
382 | "but URB has no stream ID.\n", | |
383 | slot_id, ep_index); | |
384 | return NULL; | |
385 | } | |
386 | ||
387 | if (stream_id < ep->stream_info->num_streams) | |
388 | return ep->stream_info->stream_rings[stream_id]; | |
389 | ||
390 | xhci_warn(xhci, | |
391 | "WARN: Slot ID %u, ep index %u has " | |
392 | "stream IDs 1 to %u allocated, " | |
393 | "but stream ID %u is requested.\n", | |
394 | slot_id, ep_index, | |
395 | ep->stream_info->num_streams - 1, | |
396 | stream_id); | |
397 | return NULL; | |
398 | } | |
399 | ||
ae636747 SS |
400 | /* |
401 | * Move the xHC's endpoint ring dequeue pointer past cur_td. | |
402 | * Record the new state of the xHC's endpoint ring dequeue segment, | |
403 | * dequeue pointer, and new consumer cycle state in state. | |
404 | * Update our internal representation of the ring's dequeue pointer. | |
405 | * | |
406 | * We do this in three jumps: | |
407 | * - First we update our new ring state to be the same as when the xHC stopped. | |
408 | * - Then we traverse the ring to find the segment that contains | |
409 | * the last TRB in the TD. We toggle the xHC's new cycle state when we pass | |
410 | * any link TRBs with the toggle cycle bit set. | |
411 | * - Finally we move the dequeue state one TRB further, toggling the cycle bit | |
412 | * if we've moved it past a link TRB with the toggle cycle bit set. | |
28ccd296 ME |
413 | * |
414 | * Some of the uses of xhci_generic_trb are grotty, but if they're done | |
415 | * with correct __le32 accesses they should work fine. Only users of this are | |
416 | * in here. | |
ae636747 | 417 | */ |
c92bcfa7 | 418 | void xhci_find_new_dequeue_state(struct xhci_hcd *xhci, |
ae636747 | 419 | unsigned int slot_id, unsigned int ep_index, |
e9df17eb SS |
420 | unsigned int stream_id, struct xhci_td *cur_td, |
421 | struct xhci_dequeue_state *state) | |
ae636747 SS |
422 | { |
423 | struct xhci_virt_device *dev = xhci->devs[slot_id]; | |
c4bedb77 | 424 | struct xhci_virt_ep *ep = &dev->eps[ep_index]; |
e9df17eb | 425 | struct xhci_ring *ep_ring; |
365038d8 MN |
426 | struct xhci_segment *new_seg; |
427 | union xhci_trb *new_deq; | |
c92bcfa7 | 428 | dma_addr_t addr; |
1f81b6d2 | 429 | u64 hw_dequeue; |
365038d8 MN |
430 | bool cycle_found = false; |
431 | bool td_last_trb_found = false; | |
ae636747 | 432 | |
e9df17eb SS |
433 | ep_ring = xhci_triad_to_transfer_ring(xhci, slot_id, |
434 | ep_index, stream_id); | |
435 | if (!ep_ring) { | |
436 | xhci_warn(xhci, "WARN can't find new dequeue state " | |
437 | "for invalid stream ID %u.\n", | |
438 | stream_id); | |
439 | return; | |
440 | } | |
68e41c5d | 441 | |
ae636747 | 442 | /* Dig out the cycle state saved by the xHC during the stop ep cmd */ |
aa50b290 XR |
443 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
444 | "Finding endpoint context"); | |
c4bedb77 HG |
445 | /* 4.6.9 the css flag is written to the stream context for streams */ |
446 | if (ep->ep_state & EP_HAS_STREAMS) { | |
447 | struct xhci_stream_ctx *ctx = | |
448 | &ep->stream_info->stream_ctx_array[stream_id]; | |
1f81b6d2 | 449 | hw_dequeue = le64_to_cpu(ctx->stream_ring); |
c4bedb77 HG |
450 | } else { |
451 | struct xhci_ep_ctx *ep_ctx | |
452 | = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index); | |
1f81b6d2 | 453 | hw_dequeue = le64_to_cpu(ep_ctx->deq); |
c4bedb77 | 454 | } |
ae636747 | 455 | |
365038d8 MN |
456 | new_seg = ep_ring->deq_seg; |
457 | new_deq = ep_ring->dequeue; | |
458 | state->new_cycle_state = hw_dequeue & 0x1; | |
459 | ||
1f81b6d2 | 460 | /* |
365038d8 MN |
461 | * We want to find the pointer, segment and cycle state of the new trb |
462 | * (the one after current TD's last_trb). We know the cycle state at | |
463 | * hw_dequeue, so walk the ring until both hw_dequeue and last_trb are | |
464 | * found. | |
1f81b6d2 | 465 | */ |
365038d8 MN |
466 | do { |
467 | if (!cycle_found && xhci_trb_virt_to_dma(new_seg, new_deq) | |
468 | == (dma_addr_t)(hw_dequeue & ~0xf)) { | |
469 | cycle_found = true; | |
470 | if (td_last_trb_found) | |
471 | break; | |
472 | } | |
473 | if (new_deq == cur_td->last_trb) | |
474 | td_last_trb_found = true; | |
1f81b6d2 | 475 | |
365038d8 MN |
476 | if (cycle_found && |
477 | TRB_TYPE_LINK_LE32(new_deq->generic.field[3]) && | |
478 | new_deq->generic.field[3] & cpu_to_le32(LINK_TOGGLE)) | |
479 | state->new_cycle_state ^= 0x1; | |
480 | ||
481 | next_trb(xhci, ep_ring, &new_seg, &new_deq); | |
482 | ||
483 | /* Search wrapped around, bail out */ | |
484 | if (new_deq == ep->ring->dequeue) { | |
485 | xhci_err(xhci, "Error: Failed finding new dequeue state\n"); | |
486 | state->new_deq_seg = NULL; | |
487 | state->new_deq_ptr = NULL; | |
488 | return; | |
489 | } | |
490 | ||
491 | } while (!cycle_found || !td_last_trb_found); | |
ae636747 | 492 | |
365038d8 MN |
493 | state->new_deq_seg = new_seg; |
494 | state->new_deq_ptr = new_deq; | |
ae636747 | 495 | |
1f81b6d2 | 496 | /* Don't update the ring cycle state for the producer (us). */ |
aa50b290 XR |
497 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
498 | "Cycle state = 0x%x", state->new_cycle_state); | |
01a1fdb9 | 499 | |
aa50b290 XR |
500 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
501 | "New dequeue segment = %p (virtual)", | |
c92bcfa7 SS |
502 | state->new_deq_seg); |
503 | addr = xhci_trb_virt_to_dma(state->new_deq_seg, state->new_deq_ptr); | |
aa50b290 XR |
504 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
505 | "New dequeue pointer = 0x%llx (DMA)", | |
c92bcfa7 | 506 | (unsigned long long) addr); |
ae636747 SS |
507 | } |
508 | ||
522989a2 SS |
509 | /* flip_cycle means flip the cycle bit of all but the first and last TRB. |
510 | * (The last TRB actually points to the ring enqueue pointer, which is not part | |
511 | * of this TD.) This is used to remove partially enqueued isoc TDs from a ring. | |
512 | */ | |
23e3be11 | 513 | static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring, |
522989a2 | 514 | struct xhci_td *cur_td, bool flip_cycle) |
ae636747 SS |
515 | { |
516 | struct xhci_segment *cur_seg; | |
517 | union xhci_trb *cur_trb; | |
518 | ||
519 | for (cur_seg = cur_td->start_seg, cur_trb = cur_td->first_trb; | |
520 | true; | |
521 | next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) { | |
f5960b69 | 522 | if (TRB_TYPE_LINK_LE32(cur_trb->generic.field[3])) { |
ae636747 SS |
523 | /* Unchain any chained Link TRBs, but |
524 | * leave the pointers intact. | |
525 | */ | |
28ccd296 | 526 | cur_trb->generic.field[3] &= cpu_to_le32(~TRB_CHAIN); |
522989a2 SS |
527 | /* Flip the cycle bit (link TRBs can't be the first |
528 | * or last TRB). | |
529 | */ | |
530 | if (flip_cycle) | |
531 | cur_trb->generic.field[3] ^= | |
532 | cpu_to_le32(TRB_CYCLE); | |
aa50b290 XR |
533 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
534 | "Cancel (unchain) link TRB"); | |
535 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, | |
536 | "Address = %p (0x%llx dma); " | |
537 | "in seg %p (0x%llx dma)", | |
700e2052 | 538 | cur_trb, |
23e3be11 | 539 | (unsigned long long)xhci_trb_virt_to_dma(cur_seg, cur_trb), |
700e2052 GKH |
540 | cur_seg, |
541 | (unsigned long long)cur_seg->dma); | |
ae636747 SS |
542 | } else { |
543 | cur_trb->generic.field[0] = 0; | |
544 | cur_trb->generic.field[1] = 0; | |
545 | cur_trb->generic.field[2] = 0; | |
546 | /* Preserve only the cycle bit of this TRB */ | |
28ccd296 | 547 | cur_trb->generic.field[3] &= cpu_to_le32(TRB_CYCLE); |
522989a2 SS |
548 | /* Flip the cycle bit except on the first or last TRB */ |
549 | if (flip_cycle && cur_trb != cur_td->first_trb && | |
550 | cur_trb != cur_td->last_trb) | |
551 | cur_trb->generic.field[3] ^= | |
552 | cpu_to_le32(TRB_CYCLE); | |
28ccd296 ME |
553 | cur_trb->generic.field[3] |= cpu_to_le32( |
554 | TRB_TYPE(TRB_TR_NOOP)); | |
aa50b290 XR |
555 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
556 | "TRB to noop at offset 0x%llx", | |
79688acf SS |
557 | (unsigned long long) |
558 | xhci_trb_virt_to_dma(cur_seg, cur_trb)); | |
ae636747 SS |
559 | } |
560 | if (cur_trb == cur_td->last_trb) | |
561 | break; | |
562 | } | |
563 | } | |
564 | ||
575688e1 | 565 | static void xhci_stop_watchdog_timer_in_irq(struct xhci_hcd *xhci, |
6f5165cf SS |
566 | struct xhci_virt_ep *ep) |
567 | { | |
568 | ep->ep_state &= ~EP_HALT_PENDING; | |
569 | /* Can't del_timer_sync in interrupt, so we attempt to cancel. If the | |
570 | * timer is running on another CPU, we don't decrement stop_cmds_pending | |
571 | * (since we didn't successfully stop the watchdog timer). | |
572 | */ | |
573 | if (del_timer(&ep->stop_cmd_timer)) | |
574 | ep->stop_cmds_pending--; | |
575 | } | |
576 | ||
577 | /* Must be called with xhci->lock held in interrupt context */ | |
578 | static void xhci_giveback_urb_in_irq(struct xhci_hcd *xhci, | |
07a37e9e | 579 | struct xhci_td *cur_td, int status) |
6f5165cf | 580 | { |
214f76f7 | 581 | struct usb_hcd *hcd; |
8e51adcc AX |
582 | struct urb *urb; |
583 | struct urb_priv *urb_priv; | |
6f5165cf | 584 | |
8e51adcc AX |
585 | urb = cur_td->urb; |
586 | urb_priv = urb->hcpriv; | |
587 | urb_priv->td_cnt++; | |
214f76f7 | 588 | hcd = bus_to_hcd(urb->dev->bus); |
6f5165cf | 589 | |
8e51adcc AX |
590 | /* Only giveback urb when this is the last td in urb */ |
591 | if (urb_priv->td_cnt == urb_priv->length) { | |
c41136b0 AX |
592 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
593 | xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs--; | |
594 | if (xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs == 0) { | |
595 | if (xhci->quirks & XHCI_AMD_PLL_FIX) | |
596 | usb_amd_quirk_pll_enable(); | |
597 | } | |
598 | } | |
8e51adcc | 599 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
8e51adcc AX |
600 | |
601 | spin_unlock(&xhci->lock); | |
602 | usb_hcd_giveback_urb(hcd, urb, status); | |
4daf9df5 | 603 | xhci_urb_free_priv(urb_priv); |
8e51adcc | 604 | spin_lock(&xhci->lock); |
8e51adcc | 605 | } |
6f5165cf SS |
606 | } |
607 | ||
f9c589e1 MN |
608 | void xhci_unmap_td_bounce_buffer(struct xhci_hcd *xhci, struct xhci_ring *ring, |
609 | struct xhci_td *td) | |
610 | { | |
611 | struct device *dev = xhci_to_hcd(xhci)->self.controller; | |
612 | struct xhci_segment *seg = td->bounce_seg; | |
613 | struct urb *urb = td->urb; | |
614 | ||
615 | if (!seg || !urb) | |
616 | return; | |
617 | ||
618 | if (usb_urb_dir_out(urb)) { | |
619 | dma_unmap_single(dev, seg->bounce_dma, ring->bounce_buf_len, | |
620 | DMA_TO_DEVICE); | |
621 | return; | |
622 | } | |
623 | ||
624 | /* for in tranfers we need to copy the data from bounce to sg */ | |
625 | sg_pcopy_from_buffer(urb->sg, urb->num_mapped_sgs, seg->bounce_buf, | |
626 | seg->bounce_len, seg->bounce_offs); | |
627 | dma_unmap_single(dev, seg->bounce_dma, ring->bounce_buf_len, | |
628 | DMA_FROM_DEVICE); | |
629 | seg->bounce_len = 0; | |
630 | seg->bounce_offs = 0; | |
631 | } | |
632 | ||
ae636747 SS |
633 | /* |
634 | * When we get a command completion for a Stop Endpoint Command, we need to | |
635 | * unlink any cancelled TDs from the ring. There are two ways to do that: | |
636 | * | |
637 | * 1. If the HW was in the middle of processing the TD that needs to be | |
638 | * cancelled, then we must move the ring's dequeue pointer past the last TRB | |
639 | * in the TD with a Set Dequeue Pointer Command. | |
640 | * 2. Otherwise, we turn all the TRBs in the TD into No-op TRBs (with the chain | |
641 | * bit cleared) so that the HW will skip over them. | |
642 | */ | |
b8200c94 | 643 | static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id, |
be88fe4f | 644 | union xhci_trb *trb, struct xhci_event_cmd *event) |
ae636747 | 645 | { |
ae636747 SS |
646 | unsigned int ep_index; |
647 | struct xhci_ring *ep_ring; | |
63a0d9ab | 648 | struct xhci_virt_ep *ep; |
ae636747 | 649 | struct list_head *entry; |
326b4810 | 650 | struct xhci_td *cur_td = NULL; |
ae636747 SS |
651 | struct xhci_td *last_unlinked_td; |
652 | ||
c92bcfa7 | 653 | struct xhci_dequeue_state deq_state; |
ae636747 | 654 | |
bc752bde | 655 | if (unlikely(TRB_TO_SUSPEND_PORT(le32_to_cpu(trb->generic.field[3])))) { |
9ea1833e | 656 | if (!xhci->devs[slot_id]) |
be88fe4f AX |
657 | xhci_warn(xhci, "Stop endpoint command " |
658 | "completion for disabled slot %u\n", | |
659 | slot_id); | |
660 | return; | |
661 | } | |
662 | ||
ae636747 | 663 | memset(&deq_state, 0, sizeof(deq_state)); |
28ccd296 | 664 | ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3])); |
63a0d9ab | 665 | ep = &xhci->devs[slot_id]->eps[ep_index]; |
ae636747 | 666 | |
678539cf | 667 | if (list_empty(&ep->cancelled_td_list)) { |
6f5165cf | 668 | xhci_stop_watchdog_timer_in_irq(xhci, ep); |
0714a57c | 669 | ep->stopped_td = NULL; |
e9df17eb | 670 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); |
ae636747 | 671 | return; |
678539cf | 672 | } |
ae636747 SS |
673 | |
674 | /* Fix up the ep ring first, so HW stops executing cancelled TDs. | |
675 | * We have the xHCI lock, so nothing can modify this list until we drop | |
676 | * it. We're also in the event handler, so we can't get re-interrupted | |
677 | * if another Stop Endpoint command completes | |
678 | */ | |
63a0d9ab | 679 | list_for_each(entry, &ep->cancelled_td_list) { |
ae636747 | 680 | cur_td = list_entry(entry, struct xhci_td, cancelled_td_list); |
aa50b290 XR |
681 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
682 | "Removing canceled TD starting at 0x%llx (dma).", | |
79688acf SS |
683 | (unsigned long long)xhci_trb_virt_to_dma( |
684 | cur_td->start_seg, cur_td->first_trb)); | |
e9df17eb SS |
685 | ep_ring = xhci_urb_to_transfer_ring(xhci, cur_td->urb); |
686 | if (!ep_ring) { | |
687 | /* This shouldn't happen unless a driver is mucking | |
688 | * with the stream ID after submission. This will | |
689 | * leave the TD on the hardware ring, and the hardware | |
690 | * will try to execute it, and may access a buffer | |
691 | * that has already been freed. In the best case, the | |
692 | * hardware will execute it, and the event handler will | |
693 | * ignore the completion event for that TD, since it was | |
694 | * removed from the td_list for that endpoint. In | |
695 | * short, don't muck with the stream ID after | |
696 | * submission. | |
697 | */ | |
698 | xhci_warn(xhci, "WARN Cancelled URB %p " | |
699 | "has invalid stream ID %u.\n", | |
700 | cur_td->urb, | |
701 | cur_td->urb->stream_id); | |
702 | goto remove_finished_td; | |
703 | } | |
ae636747 SS |
704 | /* |
705 | * If we stopped on the TD we need to cancel, then we have to | |
706 | * move the xHC endpoint ring dequeue pointer past this TD. | |
707 | */ | |
63a0d9ab | 708 | if (cur_td == ep->stopped_td) |
e9df17eb SS |
709 | xhci_find_new_dequeue_state(xhci, slot_id, ep_index, |
710 | cur_td->urb->stream_id, | |
711 | cur_td, &deq_state); | |
ae636747 | 712 | else |
522989a2 | 713 | td_to_noop(xhci, ep_ring, cur_td, false); |
e9df17eb | 714 | remove_finished_td: |
ae636747 SS |
715 | /* |
716 | * The event handler won't see a completion for this TD anymore, | |
717 | * so remove it from the endpoint ring's TD list. Keep it in | |
718 | * the cancelled TD list for URB completion later. | |
719 | */ | |
585df1d9 | 720 | list_del_init(&cur_td->td_list); |
ae636747 SS |
721 | } |
722 | last_unlinked_td = cur_td; | |
6f5165cf | 723 | xhci_stop_watchdog_timer_in_irq(xhci, ep); |
ae636747 SS |
724 | |
725 | /* If necessary, queue a Set Transfer Ring Dequeue Pointer command */ | |
726 | if (deq_state.new_deq_ptr && deq_state.new_deq_seg) { | |
1e3452e3 HG |
727 | xhci_queue_new_dequeue_state(xhci, slot_id, ep_index, |
728 | ep->stopped_td->urb->stream_id, &deq_state); | |
ac9d8fe7 | 729 | xhci_ring_cmd_db(xhci); |
ae636747 | 730 | } else { |
e9df17eb SS |
731 | /* Otherwise ring the doorbell(s) to restart queued transfers */ |
732 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); | |
ae636747 | 733 | } |
526867c3 | 734 | |
d97b4f8d | 735 | ep->stopped_td = NULL; |
ae636747 SS |
736 | |
737 | /* | |
738 | * Drop the lock and complete the URBs in the cancelled TD list. | |
739 | * New TDs to be cancelled might be added to the end of the list before | |
740 | * we can complete all the URBs for the TDs we already unlinked. | |
741 | * So stop when we've completed the URB for the last TD we unlinked. | |
742 | */ | |
743 | do { | |
63a0d9ab | 744 | cur_td = list_entry(ep->cancelled_td_list.next, |
ae636747 | 745 | struct xhci_td, cancelled_td_list); |
585df1d9 | 746 | list_del_init(&cur_td->cancelled_td_list); |
ae636747 SS |
747 | |
748 | /* Clean up the cancelled URB */ | |
ae636747 SS |
749 | /* Doesn't matter what we pass for status, since the core will |
750 | * just overwrite it (because the URB has been unlinked). | |
751 | */ | |
f76a28a6 | 752 | ep_ring = xhci_urb_to_transfer_ring(xhci, cur_td->urb); |
f9c589e1 MN |
753 | if (ep_ring && cur_td->bounce_seg) |
754 | xhci_unmap_td_bounce_buffer(xhci, ep_ring, cur_td); | |
07a37e9e | 755 | xhci_giveback_urb_in_irq(xhci, cur_td, 0); |
ae636747 | 756 | |
6f5165cf SS |
757 | /* Stop processing the cancelled list if the watchdog timer is |
758 | * running. | |
759 | */ | |
760 | if (xhci->xhc_state & XHCI_STATE_DYING) | |
761 | return; | |
ae636747 SS |
762 | } while (cur_td != last_unlinked_td); |
763 | ||
764 | /* Return to the event handler with xhci->lock re-acquired */ | |
765 | } | |
766 | ||
50e8725e SS |
767 | static void xhci_kill_ring_urbs(struct xhci_hcd *xhci, struct xhci_ring *ring) |
768 | { | |
769 | struct xhci_td *cur_td; | |
770 | ||
771 | while (!list_empty(&ring->td_list)) { | |
772 | cur_td = list_first_entry(&ring->td_list, | |
773 | struct xhci_td, td_list); | |
774 | list_del_init(&cur_td->td_list); | |
775 | if (!list_empty(&cur_td->cancelled_td_list)) | |
776 | list_del_init(&cur_td->cancelled_td_list); | |
f9c589e1 MN |
777 | |
778 | if (cur_td->bounce_seg) | |
779 | xhci_unmap_td_bounce_buffer(xhci, ring, cur_td); | |
50e8725e SS |
780 | xhci_giveback_urb_in_irq(xhci, cur_td, -ESHUTDOWN); |
781 | } | |
782 | } | |
783 | ||
784 | static void xhci_kill_endpoint_urbs(struct xhci_hcd *xhci, | |
785 | int slot_id, int ep_index) | |
786 | { | |
787 | struct xhci_td *cur_td; | |
788 | struct xhci_virt_ep *ep; | |
789 | struct xhci_ring *ring; | |
790 | ||
791 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
21d0e51b SS |
792 | if ((ep->ep_state & EP_HAS_STREAMS) || |
793 | (ep->ep_state & EP_GETTING_NO_STREAMS)) { | |
794 | int stream_id; | |
795 | ||
796 | for (stream_id = 0; stream_id < ep->stream_info->num_streams; | |
797 | stream_id++) { | |
798 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, | |
799 | "Killing URBs for slot ID %u, ep index %u, stream %u", | |
800 | slot_id, ep_index, stream_id + 1); | |
801 | xhci_kill_ring_urbs(xhci, | |
802 | ep->stream_info->stream_rings[stream_id]); | |
803 | } | |
804 | } else { | |
805 | ring = ep->ring; | |
806 | if (!ring) | |
807 | return; | |
808 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, | |
809 | "Killing URBs for slot ID %u, ep index %u", | |
810 | slot_id, ep_index); | |
811 | xhci_kill_ring_urbs(xhci, ring); | |
812 | } | |
50e8725e SS |
813 | while (!list_empty(&ep->cancelled_td_list)) { |
814 | cur_td = list_first_entry(&ep->cancelled_td_list, | |
815 | struct xhci_td, cancelled_td_list); | |
816 | list_del_init(&cur_td->cancelled_td_list); | |
817 | xhci_giveback_urb_in_irq(xhci, cur_td, -ESHUTDOWN); | |
818 | } | |
819 | } | |
820 | ||
6f5165cf SS |
821 | /* Watchdog timer function for when a stop endpoint command fails to complete. |
822 | * In this case, we assume the host controller is broken or dying or dead. The | |
823 | * host may still be completing some other events, so we have to be careful to | |
824 | * let the event ring handler and the URB dequeueing/enqueueing functions know | |
825 | * through xhci->state. | |
826 | * | |
827 | * The timer may also fire if the host takes a very long time to respond to the | |
828 | * command, and the stop endpoint command completion handler cannot delete the | |
829 | * timer before the timer function is called. Another endpoint cancellation may | |
830 | * sneak in before the timer function can grab the lock, and that may queue | |
831 | * another stop endpoint command and add the timer back. So we cannot use a | |
832 | * simple flag to say whether there is a pending stop endpoint command for a | |
833 | * particular endpoint. | |
834 | * | |
835 | * Instead we use a combination of that flag and a counter for the number of | |
836 | * pending stop endpoint commands. If the timer is the tail end of the last | |
837 | * stop endpoint command, and the endpoint's command is still pending, we assume | |
838 | * the host is dying. | |
839 | */ | |
840 | void xhci_stop_endpoint_command_watchdog(unsigned long arg) | |
841 | { | |
842 | struct xhci_hcd *xhci; | |
843 | struct xhci_virt_ep *ep; | |
6f5165cf | 844 | int ret, i, j; |
f43d6231 | 845 | unsigned long flags; |
6f5165cf SS |
846 | |
847 | ep = (struct xhci_virt_ep *) arg; | |
848 | xhci = ep->xhci; | |
849 | ||
f43d6231 | 850 | spin_lock_irqsave(&xhci->lock, flags); |
6f5165cf SS |
851 | |
852 | ep->stop_cmds_pending--; | |
bcf42aa6 MN |
853 | if (xhci->xhc_state & XHCI_STATE_REMOVING) { |
854 | spin_unlock_irqrestore(&xhci->lock, flags); | |
855 | return; | |
856 | } | |
6f5165cf | 857 | if (xhci->xhc_state & XHCI_STATE_DYING) { |
aa50b290 XR |
858 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
859 | "Stop EP timer ran, but another timer marked " | |
860 | "xHCI as DYING, exiting."); | |
f43d6231 | 861 | spin_unlock_irqrestore(&xhci->lock, flags); |
6f5165cf SS |
862 | return; |
863 | } | |
864 | if (!(ep->stop_cmds_pending == 0 && (ep->ep_state & EP_HALT_PENDING))) { | |
aa50b290 XR |
865 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
866 | "Stop EP timer ran, but no command pending, " | |
867 | "exiting."); | |
f43d6231 | 868 | spin_unlock_irqrestore(&xhci->lock, flags); |
6f5165cf SS |
869 | return; |
870 | } | |
871 | ||
872 | xhci_warn(xhci, "xHCI host not responding to stop endpoint command.\n"); | |
873 | xhci_warn(xhci, "Assuming host is dying, halting host.\n"); | |
874 | /* Oops, HC is dead or dying or at least not responding to the stop | |
875 | * endpoint command. | |
876 | */ | |
877 | xhci->xhc_state |= XHCI_STATE_DYING; | |
878 | /* Disable interrupts from the host controller and start halting it */ | |
879 | xhci_quiesce(xhci); | |
f43d6231 | 880 | spin_unlock_irqrestore(&xhci->lock, flags); |
6f5165cf SS |
881 | |
882 | ret = xhci_halt(xhci); | |
883 | ||
f43d6231 | 884 | spin_lock_irqsave(&xhci->lock, flags); |
6f5165cf SS |
885 | if (ret < 0) { |
886 | /* This is bad; the host is not responding to commands and it's | |
887 | * not allowing itself to be halted. At least interrupts are | |
ac04e6ff | 888 | * disabled. If we call usb_hc_died(), it will attempt to |
6f5165cf SS |
889 | * disconnect all device drivers under this host. Those |
890 | * disconnect() methods will wait for all URBs to be unlinked, | |
891 | * so we must complete them. | |
892 | */ | |
893 | xhci_warn(xhci, "Non-responsive xHCI host is not halting.\n"); | |
894 | xhci_warn(xhci, "Completing active URBs anyway.\n"); | |
895 | /* We could turn all TDs on the rings to no-ops. This won't | |
896 | * help if the host has cached part of the ring, and is slow if | |
897 | * we want to preserve the cycle bit. Skip it and hope the host | |
898 | * doesn't touch the memory. | |
899 | */ | |
900 | } | |
901 | for (i = 0; i < MAX_HC_SLOTS; i++) { | |
902 | if (!xhci->devs[i]) | |
903 | continue; | |
50e8725e SS |
904 | for (j = 0; j < 31; j++) |
905 | xhci_kill_endpoint_urbs(xhci, i, j); | |
6f5165cf | 906 | } |
f43d6231 | 907 | spin_unlock_irqrestore(&xhci->lock, flags); |
aa50b290 XR |
908 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
909 | "Calling usb_hc_died()"); | |
bcf42aa6 | 910 | usb_hc_died(xhci_to_hcd(xhci)); |
aa50b290 XR |
911 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
912 | "xHCI host controller is dead."); | |
6f5165cf SS |
913 | } |
914 | ||
b008df60 AX |
915 | |
916 | static void update_ring_for_set_deq_completion(struct xhci_hcd *xhci, | |
917 | struct xhci_virt_device *dev, | |
918 | struct xhci_ring *ep_ring, | |
919 | unsigned int ep_index) | |
920 | { | |
921 | union xhci_trb *dequeue_temp; | |
922 | int num_trbs_free_temp; | |
923 | bool revert = false; | |
924 | ||
925 | num_trbs_free_temp = ep_ring->num_trbs_free; | |
926 | dequeue_temp = ep_ring->dequeue; | |
927 | ||
0d9f78a9 SS |
928 | /* If we get two back-to-back stalls, and the first stalled transfer |
929 | * ends just before a link TRB, the dequeue pointer will be left on | |
930 | * the link TRB by the code in the while loop. So we have to update | |
931 | * the dequeue pointer one segment further, or we'll jump off | |
932 | * the segment into la-la-land. | |
933 | */ | |
2d98ef40 | 934 | if (trb_is_link(ep_ring->dequeue)) { |
0d9f78a9 SS |
935 | ep_ring->deq_seg = ep_ring->deq_seg->next; |
936 | ep_ring->dequeue = ep_ring->deq_seg->trbs; | |
937 | } | |
938 | ||
b008df60 AX |
939 | while (ep_ring->dequeue != dev->eps[ep_index].queued_deq_ptr) { |
940 | /* We have more usable TRBs */ | |
941 | ep_ring->num_trbs_free++; | |
942 | ep_ring->dequeue++; | |
2d98ef40 | 943 | if (trb_is_link(ep_ring->dequeue)) { |
b008df60 AX |
944 | if (ep_ring->dequeue == |
945 | dev->eps[ep_index].queued_deq_ptr) | |
946 | break; | |
947 | ep_ring->deq_seg = ep_ring->deq_seg->next; | |
948 | ep_ring->dequeue = ep_ring->deq_seg->trbs; | |
949 | } | |
950 | if (ep_ring->dequeue == dequeue_temp) { | |
951 | revert = true; | |
952 | break; | |
953 | } | |
954 | } | |
955 | ||
956 | if (revert) { | |
957 | xhci_dbg(xhci, "Unable to find new dequeue pointer\n"); | |
958 | ep_ring->num_trbs_free = num_trbs_free_temp; | |
959 | } | |
960 | } | |
961 | ||
ae636747 SS |
962 | /* |
963 | * When we get a completion for a Set Transfer Ring Dequeue Pointer command, | |
964 | * we need to clear the set deq pending flag in the endpoint ring state, so that | |
965 | * the TD queueing code can ring the doorbell again. We also need to ring the | |
966 | * endpoint doorbell to restart the ring, but only if there aren't more | |
967 | * cancellations pending. | |
968 | */ | |
b8200c94 | 969 | static void xhci_handle_cmd_set_deq(struct xhci_hcd *xhci, int slot_id, |
c69a0597 | 970 | union xhci_trb *trb, u32 cmd_comp_code) |
ae636747 | 971 | { |
ae636747 | 972 | unsigned int ep_index; |
e9df17eb | 973 | unsigned int stream_id; |
ae636747 SS |
974 | struct xhci_ring *ep_ring; |
975 | struct xhci_virt_device *dev; | |
9aad95e2 | 976 | struct xhci_virt_ep *ep; |
d115b048 JY |
977 | struct xhci_ep_ctx *ep_ctx; |
978 | struct xhci_slot_ctx *slot_ctx; | |
ae636747 | 979 | |
28ccd296 ME |
980 | ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3])); |
981 | stream_id = TRB_TO_STREAM_ID(le32_to_cpu(trb->generic.field[2])); | |
ae636747 | 982 | dev = xhci->devs[slot_id]; |
9aad95e2 | 983 | ep = &dev->eps[ep_index]; |
e9df17eb SS |
984 | |
985 | ep_ring = xhci_stream_id_to_ring(dev, ep_index, stream_id); | |
986 | if (!ep_ring) { | |
e587b8b2 | 987 | xhci_warn(xhci, "WARN Set TR deq ptr command for freed stream ID %u\n", |
e9df17eb SS |
988 | stream_id); |
989 | /* XXX: Harmless??? */ | |
0d4976ec | 990 | goto cleanup; |
e9df17eb SS |
991 | } |
992 | ||
d115b048 JY |
993 | ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index); |
994 | slot_ctx = xhci_get_slot_ctx(xhci, dev->out_ctx); | |
ae636747 | 995 | |
c69a0597 | 996 | if (cmd_comp_code != COMP_SUCCESS) { |
ae636747 SS |
997 | unsigned int ep_state; |
998 | unsigned int slot_state; | |
999 | ||
c69a0597 | 1000 | switch (cmd_comp_code) { |
ae636747 | 1001 | case COMP_TRB_ERR: |
e587b8b2 | 1002 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd invalid because of stream ID configuration\n"); |
ae636747 SS |
1003 | break; |
1004 | case COMP_CTX_STATE: | |
e587b8b2 | 1005 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state.\n"); |
28ccd296 | 1006 | ep_state = le32_to_cpu(ep_ctx->ep_info); |
ae636747 | 1007 | ep_state &= EP_STATE_MASK; |
28ccd296 | 1008 | slot_state = le32_to_cpu(slot_ctx->dev_state); |
ae636747 | 1009 | slot_state = GET_SLOT_STATE(slot_state); |
aa50b290 XR |
1010 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
1011 | "Slot state = %u, EP state = %u", | |
ae636747 SS |
1012 | slot_state, ep_state); |
1013 | break; | |
1014 | case COMP_EBADSLT: | |
e587b8b2 ON |
1015 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd failed because slot %u was not enabled.\n", |
1016 | slot_id); | |
ae636747 SS |
1017 | break; |
1018 | default: | |
e587b8b2 ON |
1019 | xhci_warn(xhci, "WARN Set TR Deq Ptr cmd with unknown completion code of %u.\n", |
1020 | cmd_comp_code); | |
ae636747 SS |
1021 | break; |
1022 | } | |
1023 | /* OK what do we do now? The endpoint state is hosed, and we | |
1024 | * should never get to this point if the synchronization between | |
1025 | * queueing, and endpoint state are correct. This might happen | |
1026 | * if the device gets disconnected after we've finished | |
1027 | * cancelling URBs, which might not be an error... | |
1028 | */ | |
1029 | } else { | |
9aad95e2 HG |
1030 | u64 deq; |
1031 | /* 4.6.10 deq ptr is written to the stream ctx for streams */ | |
1032 | if (ep->ep_state & EP_HAS_STREAMS) { | |
1033 | struct xhci_stream_ctx *ctx = | |
1034 | &ep->stream_info->stream_ctx_array[stream_id]; | |
1035 | deq = le64_to_cpu(ctx->stream_ring) & SCTX_DEQ_MASK; | |
1036 | } else { | |
1037 | deq = le64_to_cpu(ep_ctx->deq) & ~EP_CTX_CYCLE_MASK; | |
1038 | } | |
aa50b290 | 1039 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
9aad95e2 HG |
1040 | "Successful Set TR Deq Ptr cmd, deq = @%08llx", deq); |
1041 | if (xhci_trb_virt_to_dma(ep->queued_deq_seg, | |
1042 | ep->queued_deq_ptr) == deq) { | |
bf161e85 SS |
1043 | /* Update the ring's dequeue segment and dequeue pointer |
1044 | * to reflect the new position. | |
1045 | */ | |
b008df60 AX |
1046 | update_ring_for_set_deq_completion(xhci, dev, |
1047 | ep_ring, ep_index); | |
bf161e85 | 1048 | } else { |
e587b8b2 | 1049 | xhci_warn(xhci, "Mismatch between completed Set TR Deq Ptr command & xHCI internal state.\n"); |
bf161e85 | 1050 | xhci_warn(xhci, "ep deq seg = %p, deq ptr = %p\n", |
9aad95e2 | 1051 | ep->queued_deq_seg, ep->queued_deq_ptr); |
bf161e85 | 1052 | } |
ae636747 SS |
1053 | } |
1054 | ||
0d4976ec | 1055 | cleanup: |
63a0d9ab | 1056 | dev->eps[ep_index].ep_state &= ~SET_DEQ_PENDING; |
bf161e85 SS |
1057 | dev->eps[ep_index].queued_deq_seg = NULL; |
1058 | dev->eps[ep_index].queued_deq_ptr = NULL; | |
e9df17eb SS |
1059 | /* Restart any rings with pending URBs */ |
1060 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); | |
ae636747 SS |
1061 | } |
1062 | ||
b8200c94 | 1063 | static void xhci_handle_cmd_reset_ep(struct xhci_hcd *xhci, int slot_id, |
c69a0597 | 1064 | union xhci_trb *trb, u32 cmd_comp_code) |
a1587d97 | 1065 | { |
a1587d97 SS |
1066 | unsigned int ep_index; |
1067 | ||
28ccd296 | 1068 | ep_index = TRB_TO_EP_INDEX(le32_to_cpu(trb->generic.field[3])); |
a1587d97 SS |
1069 | /* This command will only fail if the endpoint wasn't halted, |
1070 | * but we don't care. | |
1071 | */ | |
a0254324 | 1072 | xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep, |
c69a0597 | 1073 | "Ignoring reset ep completion code of %u", cmd_comp_code); |
a1587d97 | 1074 | |
ac9d8fe7 SS |
1075 | /* HW with the reset endpoint quirk needs to have a configure endpoint |
1076 | * command complete before the endpoint can be used. Queue that here | |
1077 | * because the HW can't handle two commands being queued in a row. | |
1078 | */ | |
1079 | if (xhci->quirks & XHCI_RESET_EP_QUIRK) { | |
ddba5cd0 MN |
1080 | struct xhci_command *command; |
1081 | command = xhci_alloc_command(xhci, false, false, GFP_ATOMIC); | |
a0ee619f HG |
1082 | if (!command) { |
1083 | xhci_warn(xhci, "WARN Cannot submit cfg ep: ENOMEM\n"); | |
1084 | return; | |
1085 | } | |
4bdfe4c3 XR |
1086 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
1087 | "Queueing configure endpoint command"); | |
ddba5cd0 | 1088 | xhci_queue_configure_endpoint(xhci, command, |
913a8a34 SS |
1089 | xhci->devs[slot_id]->in_ctx->dma, slot_id, |
1090 | false); | |
ac9d8fe7 SS |
1091 | xhci_ring_cmd_db(xhci); |
1092 | } else { | |
c3492dbf | 1093 | /* Clear our internal halted state */ |
63a0d9ab | 1094 | xhci->devs[slot_id]->eps[ep_index].ep_state &= ~EP_HALTED; |
ac9d8fe7 | 1095 | } |
a1587d97 | 1096 | } |
ae636747 | 1097 | |
b244b431 XR |
1098 | static void xhci_handle_cmd_enable_slot(struct xhci_hcd *xhci, int slot_id, |
1099 | u32 cmd_comp_code) | |
1100 | { | |
1101 | if (cmd_comp_code == COMP_SUCCESS) | |
1102 | xhci->slot_id = slot_id; | |
1103 | else | |
1104 | xhci->slot_id = 0; | |
b244b431 XR |
1105 | } |
1106 | ||
6c02dd14 XR |
1107 | static void xhci_handle_cmd_disable_slot(struct xhci_hcd *xhci, int slot_id) |
1108 | { | |
1109 | struct xhci_virt_device *virt_dev; | |
1110 | ||
1111 | virt_dev = xhci->devs[slot_id]; | |
1112 | if (!virt_dev) | |
1113 | return; | |
1114 | if (xhci->quirks & XHCI_EP_LIMIT_QUIRK) | |
1115 | /* Delete default control endpoint resources */ | |
1116 | xhci_free_device_endpoint_resources(xhci, virt_dev, true); | |
1117 | xhci_free_virt_device(xhci, slot_id); | |
1118 | } | |
1119 | ||
6ed46d33 XR |
1120 | static void xhci_handle_cmd_config_ep(struct xhci_hcd *xhci, int slot_id, |
1121 | struct xhci_event_cmd *event, u32 cmd_comp_code) | |
1122 | { | |
1123 | struct xhci_virt_device *virt_dev; | |
1124 | struct xhci_input_control_ctx *ctrl_ctx; | |
1125 | unsigned int ep_index; | |
1126 | unsigned int ep_state; | |
1127 | u32 add_flags, drop_flags; | |
1128 | ||
6ed46d33 XR |
1129 | /* |
1130 | * Configure endpoint commands can come from the USB core | |
1131 | * configuration or alt setting changes, or because the HW | |
1132 | * needed an extra configure endpoint command after a reset | |
1133 | * endpoint command or streams were being configured. | |
1134 | * If the command was for a halted endpoint, the xHCI driver | |
1135 | * is not waiting on the configure endpoint command. | |
1136 | */ | |
9ea1833e | 1137 | virt_dev = xhci->devs[slot_id]; |
4daf9df5 | 1138 | ctrl_ctx = xhci_get_input_control_ctx(virt_dev->in_ctx); |
6ed46d33 XR |
1139 | if (!ctrl_ctx) { |
1140 | xhci_warn(xhci, "Could not get input context, bad type.\n"); | |
1141 | return; | |
1142 | } | |
1143 | ||
1144 | add_flags = le32_to_cpu(ctrl_ctx->add_flags); | |
1145 | drop_flags = le32_to_cpu(ctrl_ctx->drop_flags); | |
1146 | /* Input ctx add_flags are the endpoint index plus one */ | |
1147 | ep_index = xhci_last_valid_endpoint(add_flags) - 1; | |
1148 | ||
1149 | /* A usb_set_interface() call directly after clearing a halted | |
1150 | * condition may race on this quirky hardware. Not worth | |
1151 | * worrying about, since this is prototype hardware. Not sure | |
1152 | * if this will work for streams, but streams support was | |
1153 | * untested on this prototype. | |
1154 | */ | |
1155 | if (xhci->quirks & XHCI_RESET_EP_QUIRK && | |
1156 | ep_index != (unsigned int) -1 && | |
1157 | add_flags - SLOT_FLAG == drop_flags) { | |
1158 | ep_state = virt_dev->eps[ep_index].ep_state; | |
1159 | if (!(ep_state & EP_HALTED)) | |
ddba5cd0 | 1160 | return; |
6ed46d33 XR |
1161 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
1162 | "Completed config ep cmd - " | |
1163 | "last ep index = %d, state = %d", | |
1164 | ep_index, ep_state); | |
1165 | /* Clear internal halted state and restart ring(s) */ | |
1166 | virt_dev->eps[ep_index].ep_state &= ~EP_HALTED; | |
1167 | ring_doorbell_for_active_rings(xhci, slot_id, ep_index); | |
1168 | return; | |
1169 | } | |
6ed46d33 XR |
1170 | return; |
1171 | } | |
1172 | ||
f681321b XR |
1173 | static void xhci_handle_cmd_reset_dev(struct xhci_hcd *xhci, int slot_id, |
1174 | struct xhci_event_cmd *event) | |
1175 | { | |
f681321b | 1176 | xhci_dbg(xhci, "Completed reset device command.\n"); |
9ea1833e | 1177 | if (!xhci->devs[slot_id]) |
f681321b XR |
1178 | xhci_warn(xhci, "Reset device command completion " |
1179 | "for disabled slot %u\n", slot_id); | |
1180 | } | |
1181 | ||
2c070821 XR |
1182 | static void xhci_handle_cmd_nec_get_fw(struct xhci_hcd *xhci, |
1183 | struct xhci_event_cmd *event) | |
1184 | { | |
1185 | if (!(xhci->quirks & XHCI_NEC_HOST)) { | |
1186 | xhci->error_bitmask |= 1 << 6; | |
1187 | return; | |
1188 | } | |
1189 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, | |
1190 | "NEC firmware version %2x.%02x", | |
1191 | NEC_FW_MAJOR(le32_to_cpu(event->status)), | |
1192 | NEC_FW_MINOR(le32_to_cpu(event->status))); | |
1193 | } | |
1194 | ||
9ea1833e | 1195 | static void xhci_complete_del_and_free_cmd(struct xhci_command *cmd, u32 status) |
c9aa1a2d MN |
1196 | { |
1197 | list_del(&cmd->cmd_list); | |
9ea1833e MN |
1198 | |
1199 | if (cmd->completion) { | |
1200 | cmd->status = status; | |
1201 | complete(cmd->completion); | |
1202 | } else { | |
c9aa1a2d | 1203 | kfree(cmd); |
9ea1833e | 1204 | } |
c9aa1a2d MN |
1205 | } |
1206 | ||
1207 | void xhci_cleanup_command_queue(struct xhci_hcd *xhci) | |
1208 | { | |
1209 | struct xhci_command *cur_cmd, *tmp_cmd; | |
1210 | list_for_each_entry_safe(cur_cmd, tmp_cmd, &xhci->cmd_list, cmd_list) | |
9ea1833e | 1211 | xhci_complete_del_and_free_cmd(cur_cmd, COMP_CMD_ABORT); |
c9aa1a2d MN |
1212 | } |
1213 | ||
c311e391 MN |
1214 | /* |
1215 | * Turn all commands on command ring with status set to "aborted" to no-op trbs. | |
1216 | * If there are other commands waiting then restart the ring and kick the timer. | |
1217 | * This must be called with command ring stopped and xhci->lock held. | |
1218 | */ | |
1219 | static void xhci_handle_stopped_cmd_ring(struct xhci_hcd *xhci, | |
1220 | struct xhci_command *cur_cmd) | |
1221 | { | |
1222 | struct xhci_command *i_cmd, *tmp_cmd; | |
1223 | u32 cycle_state; | |
1224 | ||
1225 | /* Turn all aborted commands in list to no-ops, then restart */ | |
1226 | list_for_each_entry_safe(i_cmd, tmp_cmd, &xhci->cmd_list, | |
1227 | cmd_list) { | |
1228 | ||
1229 | if (i_cmd->status != COMP_CMD_ABORT) | |
1230 | continue; | |
1231 | ||
1232 | i_cmd->status = COMP_CMD_STOP; | |
1233 | ||
1234 | xhci_dbg(xhci, "Turn aborted command %p to no-op\n", | |
1235 | i_cmd->command_trb); | |
1236 | /* get cycle state from the original cmd trb */ | |
1237 | cycle_state = le32_to_cpu( | |
1238 | i_cmd->command_trb->generic.field[3]) & TRB_CYCLE; | |
1239 | /* modify the command trb to no-op command */ | |
1240 | i_cmd->command_trb->generic.field[0] = 0; | |
1241 | i_cmd->command_trb->generic.field[1] = 0; | |
1242 | i_cmd->command_trb->generic.field[2] = 0; | |
1243 | i_cmd->command_trb->generic.field[3] = cpu_to_le32( | |
1244 | TRB_TYPE(TRB_CMD_NOOP) | cycle_state); | |
1245 | ||
1246 | /* | |
1247 | * caller waiting for completion is called when command | |
1248 | * completion event is received for these no-op commands | |
1249 | */ | |
1250 | } | |
1251 | ||
1252 | xhci->cmd_ring_state = CMD_RING_STATE_RUNNING; | |
1253 | ||
1254 | /* ring command ring doorbell to restart the command ring */ | |
1255 | if ((xhci->cmd_ring->dequeue != xhci->cmd_ring->enqueue) && | |
1256 | !(xhci->xhc_state & XHCI_STATE_DYING)) { | |
1257 | xhci->current_cmd = cur_cmd; | |
1258 | mod_timer(&xhci->cmd_timer, jiffies + XHCI_CMD_DEFAULT_TIMEOUT); | |
1259 | xhci_ring_cmd_db(xhci); | |
1260 | } | |
1261 | return; | |
1262 | } | |
1263 | ||
1264 | ||
1265 | void xhci_handle_command_timeout(unsigned long data) | |
1266 | { | |
1267 | struct xhci_hcd *xhci; | |
1268 | int ret; | |
1269 | unsigned long flags; | |
1270 | u64 hw_ring_state; | |
3425aa03 | 1271 | bool second_timeout = false; |
c311e391 MN |
1272 | xhci = (struct xhci_hcd *) data; |
1273 | ||
1274 | /* mark this command to be cancelled */ | |
1275 | spin_lock_irqsave(&xhci->lock, flags); | |
1276 | if (xhci->current_cmd) { | |
3425aa03 MN |
1277 | if (xhci->current_cmd->status == COMP_CMD_ABORT) |
1278 | second_timeout = true; | |
1279 | xhci->current_cmd->status = COMP_CMD_ABORT; | |
c311e391 MN |
1280 | } |
1281 | ||
c311e391 MN |
1282 | /* Make sure command ring is running before aborting it */ |
1283 | hw_ring_state = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); | |
1284 | if ((xhci->cmd_ring_state & CMD_RING_STATE_RUNNING) && | |
1285 | (hw_ring_state & CMD_RING_RUNNING)) { | |
c311e391 MN |
1286 | spin_unlock_irqrestore(&xhci->lock, flags); |
1287 | xhci_dbg(xhci, "Command timeout\n"); | |
1288 | ret = xhci_abort_cmd_ring(xhci); | |
1289 | if (unlikely(ret == -ESHUTDOWN)) { | |
1290 | xhci_err(xhci, "Abort command ring failed\n"); | |
1291 | xhci_cleanup_command_queue(xhci); | |
1292 | usb_hc_died(xhci_to_hcd(xhci)->primary_hcd); | |
1293 | xhci_dbg(xhci, "xHCI host controller is dead.\n"); | |
1294 | } | |
1295 | return; | |
1296 | } | |
3425aa03 MN |
1297 | |
1298 | /* command ring failed to restart, or host removed. Bail out */ | |
1299 | if (second_timeout || xhci->xhc_state & XHCI_STATE_REMOVING) { | |
1300 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1301 | xhci_dbg(xhci, "command timed out twice, ring start fail?\n"); | |
1302 | xhci_cleanup_command_queue(xhci); | |
1303 | return; | |
1304 | } | |
1305 | ||
c311e391 MN |
1306 | /* command timeout on stopped ring, ring can't be aborted */ |
1307 | xhci_dbg(xhci, "Command timeout on stopped ring\n"); | |
1308 | xhci_handle_stopped_cmd_ring(xhci, xhci->current_cmd); | |
1309 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1310 | return; | |
1311 | } | |
1312 | ||
7f84eef0 SS |
1313 | static void handle_cmd_completion(struct xhci_hcd *xhci, |
1314 | struct xhci_event_cmd *event) | |
1315 | { | |
28ccd296 | 1316 | int slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
7f84eef0 SS |
1317 | u64 cmd_dma; |
1318 | dma_addr_t cmd_dequeue_dma; | |
e7a79a1d | 1319 | u32 cmd_comp_code; |
9124b121 | 1320 | union xhci_trb *cmd_trb; |
c9aa1a2d | 1321 | struct xhci_command *cmd; |
b54fc46d | 1322 | u32 cmd_type; |
7f84eef0 | 1323 | |
28ccd296 | 1324 | cmd_dma = le64_to_cpu(event->cmd_trb); |
9124b121 | 1325 | cmd_trb = xhci->cmd_ring->dequeue; |
23e3be11 | 1326 | cmd_dequeue_dma = xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg, |
9124b121 | 1327 | cmd_trb); |
7f84eef0 SS |
1328 | /* Is the command ring deq ptr out of sync with the deq seg ptr? */ |
1329 | if (cmd_dequeue_dma == 0) { | |
1330 | xhci->error_bitmask |= 1 << 4; | |
1331 | return; | |
1332 | } | |
1333 | /* Does the DMA address match our internal dequeue pointer address? */ | |
1334 | if (cmd_dma != (u64) cmd_dequeue_dma) { | |
1335 | xhci->error_bitmask |= 1 << 5; | |
1336 | return; | |
1337 | } | |
b63f4053 | 1338 | |
c9aa1a2d MN |
1339 | cmd = list_entry(xhci->cmd_list.next, struct xhci_command, cmd_list); |
1340 | ||
c311e391 MN |
1341 | del_timer(&xhci->cmd_timer); |
1342 | ||
9124b121 | 1343 | trace_xhci_cmd_completion(cmd_trb, (struct xhci_generic_trb *) event); |
63a23b9a | 1344 | |
e7a79a1d | 1345 | cmd_comp_code = GET_COMP_CODE(le32_to_cpu(event->status)); |
c311e391 MN |
1346 | |
1347 | /* If CMD ring stopped we own the trbs between enqueue and dequeue */ | |
1348 | if (cmd_comp_code == COMP_CMD_STOP) { | |
1349 | xhci_handle_stopped_cmd_ring(xhci, cmd); | |
1350 | return; | |
1351 | } | |
33be1265 MN |
1352 | |
1353 | if (cmd->command_trb != xhci->cmd_ring->dequeue) { | |
1354 | xhci_err(xhci, | |
1355 | "Command completion event does not match command\n"); | |
1356 | return; | |
1357 | } | |
1358 | ||
c311e391 MN |
1359 | /* |
1360 | * Host aborted the command ring, check if the current command was | |
1361 | * supposed to be aborted, otherwise continue normally. | |
1362 | * The command ring is stopped now, but the xHC will issue a Command | |
1363 | * Ring Stopped event which will cause us to restart it. | |
1364 | */ | |
1365 | if (cmd_comp_code == COMP_CMD_ABORT) { | |
1366 | xhci->cmd_ring_state = CMD_RING_STATE_STOPPED; | |
1367 | if (cmd->status == COMP_CMD_ABORT) | |
1368 | goto event_handled; | |
b63f4053 EF |
1369 | } |
1370 | ||
b54fc46d XR |
1371 | cmd_type = TRB_FIELD_TO_TYPE(le32_to_cpu(cmd_trb->generic.field[3])); |
1372 | switch (cmd_type) { | |
1373 | case TRB_ENABLE_SLOT: | |
e7a79a1d | 1374 | xhci_handle_cmd_enable_slot(xhci, slot_id, cmd_comp_code); |
3ffbba95 | 1375 | break; |
b54fc46d | 1376 | case TRB_DISABLE_SLOT: |
6c02dd14 | 1377 | xhci_handle_cmd_disable_slot(xhci, slot_id); |
3ffbba95 | 1378 | break; |
b54fc46d | 1379 | case TRB_CONFIG_EP: |
9ea1833e MN |
1380 | if (!cmd->completion) |
1381 | xhci_handle_cmd_config_ep(xhci, slot_id, event, | |
1382 | cmd_comp_code); | |
f94e0186 | 1383 | break; |
b54fc46d | 1384 | case TRB_EVAL_CONTEXT: |
2d3f1fac | 1385 | break; |
b54fc46d | 1386 | case TRB_ADDR_DEV: |
3ffbba95 | 1387 | break; |
b54fc46d | 1388 | case TRB_STOP_RING: |
b8200c94 XR |
1389 | WARN_ON(slot_id != TRB_TO_SLOT_ID( |
1390 | le32_to_cpu(cmd_trb->generic.field[3]))); | |
1391 | xhci_handle_cmd_stop_ep(xhci, slot_id, cmd_trb, event); | |
ae636747 | 1392 | break; |
b54fc46d | 1393 | case TRB_SET_DEQ: |
b8200c94 XR |
1394 | WARN_ON(slot_id != TRB_TO_SLOT_ID( |
1395 | le32_to_cpu(cmd_trb->generic.field[3]))); | |
c69a0597 | 1396 | xhci_handle_cmd_set_deq(xhci, slot_id, cmd_trb, cmd_comp_code); |
ae636747 | 1397 | break; |
b54fc46d | 1398 | case TRB_CMD_NOOP: |
c311e391 MN |
1399 | /* Is this an aborted command turned to NO-OP? */ |
1400 | if (cmd->status == COMP_CMD_STOP) | |
1401 | cmd_comp_code = COMP_CMD_STOP; | |
7f84eef0 | 1402 | break; |
b54fc46d | 1403 | case TRB_RESET_EP: |
b8200c94 XR |
1404 | WARN_ON(slot_id != TRB_TO_SLOT_ID( |
1405 | le32_to_cpu(cmd_trb->generic.field[3]))); | |
c69a0597 | 1406 | xhci_handle_cmd_reset_ep(xhci, slot_id, cmd_trb, cmd_comp_code); |
a1587d97 | 1407 | break; |
b54fc46d | 1408 | case TRB_RESET_DEV: |
6fcfb0d6 MN |
1409 | /* SLOT_ID field in reset device cmd completion event TRB is 0. |
1410 | * Use the SLOT_ID from the command TRB instead (xhci 4.6.11) | |
1411 | */ | |
1412 | slot_id = TRB_TO_SLOT_ID( | |
1413 | le32_to_cpu(cmd_trb->generic.field[3])); | |
f681321b | 1414 | xhci_handle_cmd_reset_dev(xhci, slot_id, event); |
2a8f82c4 | 1415 | break; |
b54fc46d | 1416 | case TRB_NEC_GET_FW: |
2c070821 | 1417 | xhci_handle_cmd_nec_get_fw(xhci, event); |
0238634d | 1418 | break; |
7f84eef0 SS |
1419 | default: |
1420 | /* Skip over unknown commands on the event ring */ | |
1421 | xhci->error_bitmask |= 1 << 6; | |
1422 | break; | |
1423 | } | |
c9aa1a2d | 1424 | |
c311e391 MN |
1425 | /* restart timer if this wasn't the last command */ |
1426 | if (cmd->cmd_list.next != &xhci->cmd_list) { | |
1427 | xhci->current_cmd = list_entry(cmd->cmd_list.next, | |
1428 | struct xhci_command, cmd_list); | |
1429 | mod_timer(&xhci->cmd_timer, jiffies + XHCI_CMD_DEFAULT_TIMEOUT); | |
1430 | } | |
1431 | ||
1432 | event_handled: | |
9ea1833e | 1433 | xhci_complete_del_and_free_cmd(cmd, cmd_comp_code); |
c9aa1a2d | 1434 | |
3b72fca0 | 1435 | inc_deq(xhci, xhci->cmd_ring); |
7f84eef0 SS |
1436 | } |
1437 | ||
0238634d SS |
1438 | static void handle_vendor_event(struct xhci_hcd *xhci, |
1439 | union xhci_trb *event) | |
1440 | { | |
1441 | u32 trb_type; | |
1442 | ||
28ccd296 | 1443 | trb_type = TRB_FIELD_TO_TYPE(le32_to_cpu(event->generic.field[3])); |
0238634d SS |
1444 | xhci_dbg(xhci, "Vendor specific event TRB type = %u\n", trb_type); |
1445 | if (trb_type == TRB_NEC_CMD_COMP && (xhci->quirks & XHCI_NEC_HOST)) | |
1446 | handle_cmd_completion(xhci, &event->event_cmd); | |
1447 | } | |
1448 | ||
f6ff0ac8 SS |
1449 | /* @port_id: the one-based port ID from the hardware (indexed from array of all |
1450 | * port registers -- USB 3.0 and USB 2.0). | |
1451 | * | |
1452 | * Returns a zero-based port number, which is suitable for indexing into each of | |
1453 | * the split roothubs' port arrays and bus state arrays. | |
d0cd5d48 | 1454 | * Add one to it in order to call xhci_find_slot_id_by_port. |
f6ff0ac8 SS |
1455 | */ |
1456 | static unsigned int find_faked_portnum_from_hw_portnum(struct usb_hcd *hcd, | |
1457 | struct xhci_hcd *xhci, u32 port_id) | |
1458 | { | |
1459 | unsigned int i; | |
1460 | unsigned int num_similar_speed_ports = 0; | |
1461 | ||
1462 | /* port_id from the hardware is 1-based, but port_array[], usb3_ports[], | |
1463 | * and usb2_ports are 0-based indexes. Count the number of similar | |
1464 | * speed ports, up to 1 port before this port. | |
1465 | */ | |
1466 | for (i = 0; i < (port_id - 1); i++) { | |
1467 | u8 port_speed = xhci->port_array[i]; | |
1468 | ||
1469 | /* | |
1470 | * Skip ports that don't have known speeds, or have duplicate | |
1471 | * Extended Capabilities port speed entries. | |
1472 | */ | |
22e04870 | 1473 | if (port_speed == 0 || port_speed == DUPLICATE_ENTRY) |
f6ff0ac8 SS |
1474 | continue; |
1475 | ||
1476 | /* | |
1477 | * USB 3.0 ports are always under a USB 3.0 hub. USB 2.0 and | |
1478 | * 1.1 ports are under the USB 2.0 hub. If the port speed | |
1479 | * matches the device speed, it's a similar speed port. | |
1480 | */ | |
b50107bb | 1481 | if ((port_speed == 0x03) == (hcd->speed >= HCD_USB3)) |
f6ff0ac8 SS |
1482 | num_similar_speed_ports++; |
1483 | } | |
1484 | return num_similar_speed_ports; | |
1485 | } | |
1486 | ||
623bef9e SS |
1487 | static void handle_device_notification(struct xhci_hcd *xhci, |
1488 | union xhci_trb *event) | |
1489 | { | |
1490 | u32 slot_id; | |
4ee823b8 | 1491 | struct usb_device *udev; |
623bef9e | 1492 | |
7e76ad43 | 1493 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->generic.field[3])); |
4ee823b8 | 1494 | if (!xhci->devs[slot_id]) { |
623bef9e SS |
1495 | xhci_warn(xhci, "Device Notification event for " |
1496 | "unused slot %u\n", slot_id); | |
4ee823b8 SS |
1497 | return; |
1498 | } | |
1499 | ||
1500 | xhci_dbg(xhci, "Device Wake Notification event for slot ID %u\n", | |
1501 | slot_id); | |
1502 | udev = xhci->devs[slot_id]->udev; | |
1503 | if (udev && udev->parent) | |
1504 | usb_wakeup_notification(udev->parent, udev->portnum); | |
623bef9e SS |
1505 | } |
1506 | ||
0f2a7930 SS |
1507 | static void handle_port_status(struct xhci_hcd *xhci, |
1508 | union xhci_trb *event) | |
1509 | { | |
f6ff0ac8 | 1510 | struct usb_hcd *hcd; |
0f2a7930 | 1511 | u32 port_id; |
56192531 | 1512 | u32 temp, temp1; |
518e848e | 1513 | int max_ports; |
56192531 | 1514 | int slot_id; |
5308a91b | 1515 | unsigned int faked_port_index; |
f6ff0ac8 | 1516 | u8 major_revision; |
20b67cf5 | 1517 | struct xhci_bus_state *bus_state; |
28ccd296 | 1518 | __le32 __iomem **port_array; |
386139d7 | 1519 | bool bogus_port_status = false; |
0f2a7930 SS |
1520 | |
1521 | /* Port status change events always have a successful completion code */ | |
28ccd296 | 1522 | if (GET_COMP_CODE(le32_to_cpu(event->generic.field[2])) != COMP_SUCCESS) { |
0f2a7930 SS |
1523 | xhci_warn(xhci, "WARN: xHC returned failed port status event\n"); |
1524 | xhci->error_bitmask |= 1 << 8; | |
1525 | } | |
28ccd296 | 1526 | port_id = GET_PORT_ID(le32_to_cpu(event->generic.field[0])); |
0f2a7930 SS |
1527 | xhci_dbg(xhci, "Port Status Change Event for port %d\n", port_id); |
1528 | ||
518e848e SS |
1529 | max_ports = HCS_MAX_PORTS(xhci->hcs_params1); |
1530 | if ((port_id <= 0) || (port_id > max_ports)) { | |
56192531 | 1531 | xhci_warn(xhci, "Invalid port id %d\n", port_id); |
09ce0c0c PC |
1532 | inc_deq(xhci, xhci->event_ring); |
1533 | return; | |
56192531 AX |
1534 | } |
1535 | ||
f6ff0ac8 SS |
1536 | /* Figure out which usb_hcd this port is attached to: |
1537 | * is it a USB 3.0 port or a USB 2.0/1.1 port? | |
1538 | */ | |
1539 | major_revision = xhci->port_array[port_id - 1]; | |
09ce0c0c PC |
1540 | |
1541 | /* Find the right roothub. */ | |
1542 | hcd = xhci_to_hcd(xhci); | |
b50107bb | 1543 | if ((major_revision == 0x03) != (hcd->speed >= HCD_USB3)) |
09ce0c0c PC |
1544 | hcd = xhci->shared_hcd; |
1545 | ||
f6ff0ac8 SS |
1546 | if (major_revision == 0) { |
1547 | xhci_warn(xhci, "Event for port %u not in " | |
1548 | "Extended Capabilities, ignoring.\n", | |
1549 | port_id); | |
386139d7 | 1550 | bogus_port_status = true; |
f6ff0ac8 | 1551 | goto cleanup; |
5308a91b | 1552 | } |
22e04870 | 1553 | if (major_revision == DUPLICATE_ENTRY) { |
f6ff0ac8 SS |
1554 | xhci_warn(xhci, "Event for port %u duplicated in" |
1555 | "Extended Capabilities, ignoring.\n", | |
1556 | port_id); | |
386139d7 | 1557 | bogus_port_status = true; |
f6ff0ac8 SS |
1558 | goto cleanup; |
1559 | } | |
1560 | ||
1561 | /* | |
1562 | * Hardware port IDs reported by a Port Status Change Event include USB | |
1563 | * 3.0 and USB 2.0 ports. We want to check if the port has reported a | |
1564 | * resume event, but we first need to translate the hardware port ID | |
1565 | * into the index into the ports on the correct split roothub, and the | |
1566 | * correct bus_state structure. | |
1567 | */ | |
f6ff0ac8 | 1568 | bus_state = &xhci->bus_state[hcd_index(hcd)]; |
b50107bb | 1569 | if (hcd->speed >= HCD_USB3) |
f6ff0ac8 SS |
1570 | port_array = xhci->usb3_ports; |
1571 | else | |
1572 | port_array = xhci->usb2_ports; | |
1573 | /* Find the faked port hub number */ | |
1574 | faked_port_index = find_faked_portnum_from_hw_portnum(hcd, xhci, | |
1575 | port_id); | |
5308a91b | 1576 | |
b0ba9720 | 1577 | temp = readl(port_array[faked_port_index]); |
7111ebc9 | 1578 | if (hcd->state == HC_STATE_SUSPENDED) { |
56192531 AX |
1579 | xhci_dbg(xhci, "resume root hub\n"); |
1580 | usb_hcd_resume_root_hub(hcd); | |
1581 | } | |
1582 | ||
b50107bb | 1583 | if (hcd->speed >= HCD_USB3 && (temp & PORT_PLS_MASK) == XDEV_INACTIVE) |
fac4271d ZJC |
1584 | bus_state->port_remote_wakeup &= ~(1 << faked_port_index); |
1585 | ||
56192531 AX |
1586 | if ((temp & PORT_PLC) && (temp & PORT_PLS_MASK) == XDEV_RESUME) { |
1587 | xhci_dbg(xhci, "port resume event for port %d\n", port_id); | |
1588 | ||
b0ba9720 | 1589 | temp1 = readl(&xhci->op_regs->command); |
56192531 AX |
1590 | if (!(temp1 & CMD_RUN)) { |
1591 | xhci_warn(xhci, "xHC is not running.\n"); | |
1592 | goto cleanup; | |
1593 | } | |
1594 | ||
2338b9e4 | 1595 | if (DEV_SUPERSPEED_ANY(temp)) { |
d93814cf | 1596 | xhci_dbg(xhci, "remote wake SS port %d\n", port_id); |
4ee823b8 SS |
1597 | /* Set a flag to say the port signaled remote wakeup, |
1598 | * so we can tell the difference between the end of | |
1599 | * device and host initiated resume. | |
1600 | */ | |
1601 | bus_state->port_remote_wakeup |= 1 << faked_port_index; | |
d93814cf SS |
1602 | xhci_test_and_clear_bit(xhci, port_array, |
1603 | faked_port_index, PORT_PLC); | |
c9682dff AX |
1604 | xhci_set_link_state(xhci, port_array, faked_port_index, |
1605 | XDEV_U0); | |
d93814cf SS |
1606 | /* Need to wait until the next link state change |
1607 | * indicates the device is actually in U0. | |
1608 | */ | |
1609 | bogus_port_status = true; | |
1610 | goto cleanup; | |
f69115fd MN |
1611 | } else if (!test_bit(faked_port_index, |
1612 | &bus_state->resuming_ports)) { | |
56192531 | 1613 | xhci_dbg(xhci, "resume HS port %d\n", port_id); |
f6ff0ac8 | 1614 | bus_state->resume_done[faked_port_index] = jiffies + |
b9e45188 | 1615 | msecs_to_jiffies(USB_RESUME_TIMEOUT); |
f370b996 | 1616 | set_bit(faked_port_index, &bus_state->resuming_ports); |
56192531 | 1617 | mod_timer(&hcd->rh_timer, |
f6ff0ac8 | 1618 | bus_state->resume_done[faked_port_index]); |
56192531 AX |
1619 | /* Do the rest in GetPortStatus */ |
1620 | } | |
1621 | } | |
d93814cf SS |
1622 | |
1623 | if ((temp & PORT_PLC) && (temp & PORT_PLS_MASK) == XDEV_U0 && | |
2338b9e4 | 1624 | DEV_SUPERSPEED_ANY(temp)) { |
d93814cf | 1625 | xhci_dbg(xhci, "resume SS port %d finished\n", port_id); |
4ee823b8 SS |
1626 | /* We've just brought the device into U0 through either the |
1627 | * Resume state after a device remote wakeup, or through the | |
1628 | * U3Exit state after a host-initiated resume. If it's a device | |
1629 | * initiated remote wake, don't pass up the link state change, | |
1630 | * so the roothub behavior is consistent with external | |
1631 | * USB 3.0 hub behavior. | |
1632 | */ | |
d93814cf SS |
1633 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
1634 | faked_port_index + 1); | |
1635 | if (slot_id && xhci->devs[slot_id]) | |
1636 | xhci_ring_device(xhci, slot_id); | |
ba7b5c22 | 1637 | if (bus_state->port_remote_wakeup & (1 << faked_port_index)) { |
4ee823b8 SS |
1638 | bus_state->port_remote_wakeup &= |
1639 | ~(1 << faked_port_index); | |
1640 | xhci_test_and_clear_bit(xhci, port_array, | |
1641 | faked_port_index, PORT_PLC); | |
1642 | usb_wakeup_notification(hcd->self.root_hub, | |
1643 | faked_port_index + 1); | |
1644 | bogus_port_status = true; | |
1645 | goto cleanup; | |
1646 | } | |
d93814cf | 1647 | } |
56192531 | 1648 | |
8b3d4570 SS |
1649 | /* |
1650 | * Check to see if xhci-hub.c is waiting on RExit to U0 transition (or | |
1651 | * RExit to a disconnect state). If so, let the the driver know it's | |
1652 | * out of the RExit state. | |
1653 | */ | |
2338b9e4 | 1654 | if (!DEV_SUPERSPEED_ANY(temp) && |
8b3d4570 SS |
1655 | test_and_clear_bit(faked_port_index, |
1656 | &bus_state->rexit_ports)) { | |
1657 | complete(&bus_state->rexit_done[faked_port_index]); | |
1658 | bogus_port_status = true; | |
1659 | goto cleanup; | |
1660 | } | |
1661 | ||
b50107bb | 1662 | if (hcd->speed < HCD_USB3) |
6fd45621 AX |
1663 | xhci_test_and_clear_bit(xhci, port_array, faked_port_index, |
1664 | PORT_PLC); | |
1665 | ||
56192531 | 1666 | cleanup: |
0f2a7930 | 1667 | /* Update event ring dequeue pointer before dropping the lock */ |
3b72fca0 | 1668 | inc_deq(xhci, xhci->event_ring); |
0f2a7930 | 1669 | |
386139d7 SS |
1670 | /* Don't make the USB core poll the roothub if we got a bad port status |
1671 | * change event. Besides, at that point we can't tell which roothub | |
1672 | * (USB 2.0 or USB 3.0) to kick. | |
1673 | */ | |
1674 | if (bogus_port_status) | |
1675 | return; | |
1676 | ||
c52804a4 SS |
1677 | /* |
1678 | * xHCI port-status-change events occur when the "or" of all the | |
1679 | * status-change bits in the portsc register changes from 0 to 1. | |
1680 | * New status changes won't cause an event if any other change | |
1681 | * bits are still set. When an event occurs, switch over to | |
1682 | * polling to avoid losing status changes. | |
1683 | */ | |
1684 | xhci_dbg(xhci, "%s: starting port polling.\n", __func__); | |
1685 | set_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
0f2a7930 SS |
1686 | spin_unlock(&xhci->lock); |
1687 | /* Pass this up to the core */ | |
f6ff0ac8 | 1688 | usb_hcd_poll_rh_status(hcd); |
0f2a7930 SS |
1689 | spin_lock(&xhci->lock); |
1690 | } | |
1691 | ||
d0e96f5a SS |
1692 | /* |
1693 | * This TD is defined by the TRBs starting at start_trb in start_seg and ending | |
1694 | * at end_trb, which may be in another segment. If the suspect DMA address is a | |
1695 | * TRB in this TD, this function returns that TRB's segment. Otherwise it | |
1696 | * returns 0. | |
1697 | */ | |
cffb9be8 HG |
1698 | struct xhci_segment *trb_in_td(struct xhci_hcd *xhci, |
1699 | struct xhci_segment *start_seg, | |
d0e96f5a SS |
1700 | union xhci_trb *start_trb, |
1701 | union xhci_trb *end_trb, | |
cffb9be8 HG |
1702 | dma_addr_t suspect_dma, |
1703 | bool debug) | |
d0e96f5a SS |
1704 | { |
1705 | dma_addr_t start_dma; | |
1706 | dma_addr_t end_seg_dma; | |
1707 | dma_addr_t end_trb_dma; | |
1708 | struct xhci_segment *cur_seg; | |
1709 | ||
23e3be11 | 1710 | start_dma = xhci_trb_virt_to_dma(start_seg, start_trb); |
d0e96f5a SS |
1711 | cur_seg = start_seg; |
1712 | ||
1713 | do { | |
2fa88daa | 1714 | if (start_dma == 0) |
326b4810 | 1715 | return NULL; |
ae636747 | 1716 | /* We may get an event for a Link TRB in the middle of a TD */ |
23e3be11 | 1717 | end_seg_dma = xhci_trb_virt_to_dma(cur_seg, |
2fa88daa | 1718 | &cur_seg->trbs[TRBS_PER_SEGMENT - 1]); |
d0e96f5a | 1719 | /* If the end TRB isn't in this segment, this is set to 0 */ |
23e3be11 | 1720 | end_trb_dma = xhci_trb_virt_to_dma(cur_seg, end_trb); |
d0e96f5a | 1721 | |
cffb9be8 HG |
1722 | if (debug) |
1723 | xhci_warn(xhci, | |
1724 | "Looking for event-dma %016llx trb-start %016llx trb-end %016llx seg-start %016llx seg-end %016llx\n", | |
1725 | (unsigned long long)suspect_dma, | |
1726 | (unsigned long long)start_dma, | |
1727 | (unsigned long long)end_trb_dma, | |
1728 | (unsigned long long)cur_seg->dma, | |
1729 | (unsigned long long)end_seg_dma); | |
1730 | ||
d0e96f5a SS |
1731 | if (end_trb_dma > 0) { |
1732 | /* The end TRB is in this segment, so suspect should be here */ | |
1733 | if (start_dma <= end_trb_dma) { | |
1734 | if (suspect_dma >= start_dma && suspect_dma <= end_trb_dma) | |
1735 | return cur_seg; | |
1736 | } else { | |
1737 | /* Case for one segment with | |
1738 | * a TD wrapped around to the top | |
1739 | */ | |
1740 | if ((suspect_dma >= start_dma && | |
1741 | suspect_dma <= end_seg_dma) || | |
1742 | (suspect_dma >= cur_seg->dma && | |
1743 | suspect_dma <= end_trb_dma)) | |
1744 | return cur_seg; | |
1745 | } | |
326b4810 | 1746 | return NULL; |
d0e96f5a SS |
1747 | } else { |
1748 | /* Might still be somewhere in this segment */ | |
1749 | if (suspect_dma >= start_dma && suspect_dma <= end_seg_dma) | |
1750 | return cur_seg; | |
1751 | } | |
1752 | cur_seg = cur_seg->next; | |
23e3be11 | 1753 | start_dma = xhci_trb_virt_to_dma(cur_seg, &cur_seg->trbs[0]); |
2fa88daa | 1754 | } while (cur_seg != start_seg); |
d0e96f5a | 1755 | |
326b4810 | 1756 | return NULL; |
d0e96f5a SS |
1757 | } |
1758 | ||
bcef3fd5 SS |
1759 | static void xhci_cleanup_halted_endpoint(struct xhci_hcd *xhci, |
1760 | unsigned int slot_id, unsigned int ep_index, | |
e9df17eb | 1761 | unsigned int stream_id, |
bcef3fd5 SS |
1762 | struct xhci_td *td, union xhci_trb *event_trb) |
1763 | { | |
1764 | struct xhci_virt_ep *ep = &xhci->devs[slot_id]->eps[ep_index]; | |
ddba5cd0 MN |
1765 | struct xhci_command *command; |
1766 | command = xhci_alloc_command(xhci, false, false, GFP_ATOMIC); | |
1767 | if (!command) | |
1768 | return; | |
1769 | ||
d0167ad2 | 1770 | ep->ep_state |= EP_HALTED; |
e9df17eb | 1771 | ep->stopped_stream = stream_id; |
1624ae1c | 1772 | |
ddba5cd0 | 1773 | xhci_queue_reset_ep(xhci, command, slot_id, ep_index); |
d97b4f8d | 1774 | xhci_cleanup_stalled_ring(xhci, ep_index, td); |
1624ae1c | 1775 | |
5e5cf6fc | 1776 | ep->stopped_stream = 0; |
1624ae1c | 1777 | |
bcef3fd5 SS |
1778 | xhci_ring_cmd_db(xhci); |
1779 | } | |
1780 | ||
1781 | /* Check if an error has halted the endpoint ring. The class driver will | |
1782 | * cleanup the halt for a non-default control endpoint if we indicate a stall. | |
1783 | * However, a babble and other errors also halt the endpoint ring, and the class | |
1784 | * driver won't clear the halt in that case, so we need to issue a Set Transfer | |
1785 | * Ring Dequeue Pointer command manually. | |
1786 | */ | |
1787 | static int xhci_requires_manual_halt_cleanup(struct xhci_hcd *xhci, | |
1788 | struct xhci_ep_ctx *ep_ctx, | |
1789 | unsigned int trb_comp_code) | |
1790 | { | |
1791 | /* TRB completion codes that may require a manual halt cleanup */ | |
1792 | if (trb_comp_code == COMP_TX_ERR || | |
1793 | trb_comp_code == COMP_BABBLE || | |
1794 | trb_comp_code == COMP_SPLIT_ERR) | |
d4fc8bf5 | 1795 | /* The 0.95 spec says a babbling control endpoint |
bcef3fd5 SS |
1796 | * is not halted. The 0.96 spec says it is. Some HW |
1797 | * claims to be 0.95 compliant, but it halts the control | |
1798 | * endpoint anyway. Check if a babble halted the | |
1799 | * endpoint. | |
1800 | */ | |
f5960b69 ME |
1801 | if ((ep_ctx->ep_info & cpu_to_le32(EP_STATE_MASK)) == |
1802 | cpu_to_le32(EP_STATE_HALTED)) | |
bcef3fd5 SS |
1803 | return 1; |
1804 | ||
1805 | return 0; | |
1806 | } | |
1807 | ||
b45b5069 SS |
1808 | int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code) |
1809 | { | |
1810 | if (trb_comp_code >= 224 && trb_comp_code <= 255) { | |
1811 | /* Vendor defined "informational" completion code, | |
1812 | * treat as not-an-error. | |
1813 | */ | |
1814 | xhci_dbg(xhci, "Vendor defined info completion code %u\n", | |
1815 | trb_comp_code); | |
1816 | xhci_dbg(xhci, "Treating code as success.\n"); | |
1817 | return 1; | |
1818 | } | |
1819 | return 0; | |
1820 | } | |
1821 | ||
4422da61 AX |
1822 | /* |
1823 | * Finish the td processing, remove the td from td list; | |
1824 | * Return 1 if the urb can be given back. | |
1825 | */ | |
1826 | static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
1827 | union xhci_trb *event_trb, struct xhci_transfer_event *event, | |
1828 | struct xhci_virt_ep *ep, int *status, bool skip) | |
1829 | { | |
1830 | struct xhci_virt_device *xdev; | |
1831 | struct xhci_ring *ep_ring; | |
1832 | unsigned int slot_id; | |
1833 | int ep_index; | |
1834 | struct urb *urb = NULL; | |
1835 | struct xhci_ep_ctx *ep_ctx; | |
1836 | int ret = 0; | |
8e51adcc | 1837 | struct urb_priv *urb_priv; |
4422da61 AX |
1838 | u32 trb_comp_code; |
1839 | ||
28ccd296 | 1840 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
4422da61 | 1841 | xdev = xhci->devs[slot_id]; |
28ccd296 ME |
1842 | ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1; |
1843 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); | |
4422da61 | 1844 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
28ccd296 | 1845 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); |
4422da61 AX |
1846 | |
1847 | if (skip) | |
1848 | goto td_cleanup; | |
1849 | ||
40a3b775 LB |
1850 | if (trb_comp_code == COMP_STOP_INVAL || |
1851 | trb_comp_code == COMP_STOP || | |
1852 | trb_comp_code == COMP_STOP_SHORT) { | |
4422da61 AX |
1853 | /* The Endpoint Stop Command completion will take care of any |
1854 | * stopped TDs. A stopped TD may be restarted, so don't update | |
1855 | * the ring dequeue pointer or take this TD off any lists yet. | |
1856 | */ | |
1857 | ep->stopped_td = td; | |
4422da61 | 1858 | return 0; |
69defe04 MN |
1859 | } |
1860 | if (trb_comp_code == COMP_STALL || | |
1861 | xhci_requires_manual_halt_cleanup(xhci, ep_ctx, | |
1862 | trb_comp_code)) { | |
1863 | /* Issue a reset endpoint command to clear the host side | |
1864 | * halt, followed by a set dequeue command to move the | |
1865 | * dequeue pointer past the TD. | |
1866 | * The class driver clears the device side halt later. | |
1867 | */ | |
1868 | xhci_cleanup_halted_endpoint(xhci, slot_id, ep_index, | |
1869 | ep_ring->stream_id, td, event_trb); | |
4422da61 | 1870 | } else { |
69defe04 MN |
1871 | /* Update ring dequeue pointer */ |
1872 | while (ep_ring->dequeue != td->last_trb) | |
3b72fca0 | 1873 | inc_deq(xhci, ep_ring); |
69defe04 MN |
1874 | inc_deq(xhci, ep_ring); |
1875 | } | |
4422da61 AX |
1876 | |
1877 | td_cleanup: | |
69defe04 MN |
1878 | /* Clean up the endpoint's TD list */ |
1879 | urb = td->urb; | |
1880 | urb_priv = urb->hcpriv; | |
1881 | ||
f9c589e1 MN |
1882 | /* if a bounce buffer was used to align this td then unmap it */ |
1883 | if (td->bounce_seg) | |
1884 | xhci_unmap_td_bounce_buffer(xhci, ep_ring, td); | |
1885 | ||
69defe04 MN |
1886 | /* Do one last check of the actual transfer length. |
1887 | * If the host controller said we transferred more data than the buffer | |
1888 | * length, urb->actual_length will be a very big number (since it's | |
1889 | * unsigned). Play it safe and say we didn't transfer anything. | |
1890 | */ | |
1891 | if (urb->actual_length > urb->transfer_buffer_length) { | |
1892 | xhci_warn(xhci, "URB transfer length is wrong, xHC issue? req. len = %u, act. len = %u\n", | |
1893 | urb->transfer_buffer_length, | |
1894 | urb->actual_length); | |
1895 | urb->actual_length = 0; | |
1896 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) | |
1897 | *status = -EREMOTEIO; | |
1898 | else | |
1899 | *status = 0; | |
1900 | } | |
1901 | list_del_init(&td->td_list); | |
1902 | /* Was this TD slated to be cancelled but completed anyway? */ | |
1903 | if (!list_empty(&td->cancelled_td_list)) | |
1904 | list_del_init(&td->cancelled_td_list); | |
1905 | ||
1906 | urb_priv->td_cnt++; | |
1907 | /* Giveback the urb when all the tds are completed */ | |
1908 | if (urb_priv->td_cnt == urb_priv->length) { | |
1909 | ret = 1; | |
1910 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1911 | xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs--; | |
1912 | if (xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs == 0) { | |
1913 | if (xhci->quirks & XHCI_AMD_PLL_FIX) | |
1914 | usb_amd_quirk_pll_enable(); | |
c41136b0 AX |
1915 | } |
1916 | } | |
4422da61 AX |
1917 | } |
1918 | ||
1919 | return ret; | |
1920 | } | |
1921 | ||
8af56be1 AX |
1922 | /* |
1923 | * Process control tds, update urb status and actual_length. | |
1924 | */ | |
1925 | static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
1926 | union xhci_trb *event_trb, struct xhci_transfer_event *event, | |
1927 | struct xhci_virt_ep *ep, int *status) | |
1928 | { | |
1929 | struct xhci_virt_device *xdev; | |
1930 | struct xhci_ring *ep_ring; | |
1931 | unsigned int slot_id; | |
1932 | int ep_index; | |
1933 | struct xhci_ep_ctx *ep_ctx; | |
1934 | u32 trb_comp_code; | |
1935 | ||
28ccd296 | 1936 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
8af56be1 | 1937 | xdev = xhci->devs[slot_id]; |
28ccd296 ME |
1938 | ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1; |
1939 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); | |
8af56be1 | 1940 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
28ccd296 | 1941 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); |
8af56be1 | 1942 | |
8af56be1 AX |
1943 | switch (trb_comp_code) { |
1944 | case COMP_SUCCESS: | |
1945 | if (event_trb == ep_ring->dequeue) { | |
1946 | xhci_warn(xhci, "WARN: Success on ctrl setup TRB " | |
1947 | "without IOC set??\n"); | |
1948 | *status = -ESHUTDOWN; | |
1949 | } else if (event_trb != td->last_trb) { | |
1950 | xhci_warn(xhci, "WARN: Success on ctrl data TRB " | |
1951 | "without IOC set??\n"); | |
1952 | *status = -ESHUTDOWN; | |
1953 | } else { | |
8af56be1 AX |
1954 | *status = 0; |
1955 | } | |
1956 | break; | |
1957 | case COMP_SHORT_TX: | |
8af56be1 AX |
1958 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) |
1959 | *status = -EREMOTEIO; | |
1960 | else | |
1961 | *status = 0; | |
1962 | break; | |
40a3b775 LB |
1963 | case COMP_STOP_SHORT: |
1964 | if (event_trb == ep_ring->dequeue || event_trb == td->last_trb) | |
1965 | xhci_warn(xhci, "WARN: Stopped Short Packet on ctrl setup or status TRB\n"); | |
1966 | else | |
1967 | td->urb->actual_length = | |
1968 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); | |
1969 | ||
1970 | return finish_td(xhci, td, event_trb, event, ep, status, false); | |
3abeca99 | 1971 | case COMP_STOP: |
40a3b775 LB |
1972 | /* Did we stop at data stage? */ |
1973 | if (event_trb != ep_ring->dequeue && event_trb != td->last_trb) | |
1974 | td->urb->actual_length = | |
1975 | td->urb->transfer_buffer_length - | |
1976 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); | |
1977 | /* fall through */ | |
1978 | case COMP_STOP_INVAL: | |
3abeca99 | 1979 | return finish_td(xhci, td, event_trb, event, ep, status, false); |
8af56be1 AX |
1980 | default: |
1981 | if (!xhci_requires_manual_halt_cleanup(xhci, | |
1982 | ep_ctx, trb_comp_code)) | |
1983 | break; | |
1984 | xhci_dbg(xhci, "TRB error code %u, " | |
1985 | "halted endpoint index = %u\n", | |
1986 | trb_comp_code, ep_index); | |
1987 | /* else fall through */ | |
1988 | case COMP_STALL: | |
1989 | /* Did we transfer part of the data (middle) phase? */ | |
1990 | if (event_trb != ep_ring->dequeue && | |
1991 | event_trb != td->last_trb) | |
1992 | td->urb->actual_length = | |
1c11a172 VG |
1993 | td->urb->transfer_buffer_length - |
1994 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); | |
22ae47e6 | 1995 | else if (!td->urb_length_set) |
8af56be1 AX |
1996 | td->urb->actual_length = 0; |
1997 | ||
8e71a322 | 1998 | return finish_td(xhci, td, event_trb, event, ep, status, false); |
8af56be1 AX |
1999 | } |
2000 | /* | |
2001 | * Did we transfer any data, despite the errors that might have | |
2002 | * happened? I.e. did we get past the setup stage? | |
2003 | */ | |
2004 | if (event_trb != ep_ring->dequeue) { | |
2005 | /* The event was for the status stage */ | |
2006 | if (event_trb == td->last_trb) { | |
45ba2154 | 2007 | if (td->urb_length_set) { |
8af56be1 AX |
2008 | /* Don't overwrite a previously set error code |
2009 | */ | |
2010 | if ((*status == -EINPROGRESS || *status == 0) && | |
2011 | (td->urb->transfer_flags | |
2012 | & URB_SHORT_NOT_OK)) | |
2013 | /* Did we already see a short data | |
2014 | * stage? */ | |
2015 | *status = -EREMOTEIO; | |
2016 | } else { | |
2017 | td->urb->actual_length = | |
2018 | td->urb->transfer_buffer_length; | |
2019 | } | |
2020 | } else { | |
45ba2154 AM |
2021 | /* |
2022 | * Maybe the event was for the data stage? If so, update | |
2023 | * already the actual_length of the URB and flag it as | |
2024 | * set, so that it is not overwritten in the event for | |
2025 | * the last TRB. | |
2026 | */ | |
2027 | td->urb_length_set = true; | |
3abeca99 SS |
2028 | td->urb->actual_length = |
2029 | td->urb->transfer_buffer_length - | |
1c11a172 | 2030 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); |
3abeca99 SS |
2031 | xhci_dbg(xhci, "Waiting for status " |
2032 | "stage event\n"); | |
2033 | return 0; | |
8af56be1 AX |
2034 | } |
2035 | } | |
2036 | ||
2037 | return finish_td(xhci, td, event_trb, event, ep, status, false); | |
2038 | } | |
2039 | ||
04e51901 AX |
2040 | /* |
2041 | * Process isochronous tds, update urb packet status and actual_length. | |
2042 | */ | |
2043 | static int process_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
2044 | union xhci_trb *event_trb, struct xhci_transfer_event *event, | |
2045 | struct xhci_virt_ep *ep, int *status) | |
2046 | { | |
2047 | struct xhci_ring *ep_ring; | |
2048 | struct urb_priv *urb_priv; | |
2049 | int idx; | |
2050 | int len = 0; | |
04e51901 AX |
2051 | union xhci_trb *cur_trb; |
2052 | struct xhci_segment *cur_seg; | |
926008c9 | 2053 | struct usb_iso_packet_descriptor *frame; |
04e51901 | 2054 | u32 trb_comp_code; |
926008c9 | 2055 | bool skip_td = false; |
04e51901 | 2056 | |
28ccd296 ME |
2057 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
2058 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); | |
04e51901 AX |
2059 | urb_priv = td->urb->hcpriv; |
2060 | idx = urb_priv->td_cnt; | |
926008c9 | 2061 | frame = &td->urb->iso_frame_desc[idx]; |
04e51901 | 2062 | |
926008c9 DT |
2063 | /* handle completion code */ |
2064 | switch (trb_comp_code) { | |
2065 | case COMP_SUCCESS: | |
1c11a172 | 2066 | if (EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)) == 0) { |
1530bbc6 SS |
2067 | frame->status = 0; |
2068 | break; | |
2069 | } | |
2070 | if ((xhci->quirks & XHCI_TRUST_TX_LENGTH)) | |
2071 | trb_comp_code = COMP_SHORT_TX; | |
40a3b775 LB |
2072 | /* fallthrough */ |
2073 | case COMP_STOP_SHORT: | |
926008c9 DT |
2074 | case COMP_SHORT_TX: |
2075 | frame->status = td->urb->transfer_flags & URB_SHORT_NOT_OK ? | |
2076 | -EREMOTEIO : 0; | |
2077 | break; | |
2078 | case COMP_BW_OVER: | |
2079 | frame->status = -ECOMM; | |
2080 | skip_td = true; | |
2081 | break; | |
2082 | case COMP_BUFF_OVER: | |
2083 | case COMP_BABBLE: | |
2084 | frame->status = -EOVERFLOW; | |
2085 | skip_td = true; | |
2086 | break; | |
f6ba6fe2 | 2087 | case COMP_DEV_ERR: |
926008c9 | 2088 | case COMP_STALL: |
d104d015 MN |
2089 | frame->status = -EPROTO; |
2090 | skip_td = true; | |
2091 | break; | |
9c745995 | 2092 | case COMP_TX_ERR: |
926008c9 | 2093 | frame->status = -EPROTO; |
d104d015 MN |
2094 | if (event_trb != td->last_trb) |
2095 | return 0; | |
926008c9 DT |
2096 | skip_td = true; |
2097 | break; | |
2098 | case COMP_STOP: | |
2099 | case COMP_STOP_INVAL: | |
2100 | break; | |
2101 | default: | |
2102 | frame->status = -1; | |
2103 | break; | |
04e51901 AX |
2104 | } |
2105 | ||
926008c9 DT |
2106 | if (trb_comp_code == COMP_SUCCESS || skip_td) { |
2107 | frame->actual_length = frame->length; | |
2108 | td->urb->actual_length += frame->length; | |
40a3b775 LB |
2109 | } else if (trb_comp_code == COMP_STOP_SHORT) { |
2110 | frame->actual_length = | |
2111 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); | |
2112 | td->urb->actual_length += frame->actual_length; | |
04e51901 AX |
2113 | } else { |
2114 | for (cur_trb = ep_ring->dequeue, | |
2115 | cur_seg = ep_ring->deq_seg; cur_trb != event_trb; | |
2116 | next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) { | |
f5960b69 ME |
2117 | if (!TRB_TYPE_NOOP_LE32(cur_trb->generic.field[3]) && |
2118 | !TRB_TYPE_LINK_LE32(cur_trb->generic.field[3])) | |
28ccd296 | 2119 | len += TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])); |
04e51901 | 2120 | } |
28ccd296 | 2121 | len += TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])) - |
1c11a172 | 2122 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); |
04e51901 AX |
2123 | |
2124 | if (trb_comp_code != COMP_STOP_INVAL) { | |
926008c9 | 2125 | frame->actual_length = len; |
04e51901 AX |
2126 | td->urb->actual_length += len; |
2127 | } | |
2128 | } | |
2129 | ||
04e51901 AX |
2130 | return finish_td(xhci, td, event_trb, event, ep, status, false); |
2131 | } | |
2132 | ||
926008c9 DT |
2133 | static int skip_isoc_td(struct xhci_hcd *xhci, struct xhci_td *td, |
2134 | struct xhci_transfer_event *event, | |
2135 | struct xhci_virt_ep *ep, int *status) | |
2136 | { | |
2137 | struct xhci_ring *ep_ring; | |
2138 | struct urb_priv *urb_priv; | |
2139 | struct usb_iso_packet_descriptor *frame; | |
2140 | int idx; | |
2141 | ||
f6975314 | 2142 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
926008c9 DT |
2143 | urb_priv = td->urb->hcpriv; |
2144 | idx = urb_priv->td_cnt; | |
2145 | frame = &td->urb->iso_frame_desc[idx]; | |
2146 | ||
b3df3f9c | 2147 | /* The transfer is partly done. */ |
926008c9 DT |
2148 | frame->status = -EXDEV; |
2149 | ||
2150 | /* calc actual length */ | |
2151 | frame->actual_length = 0; | |
2152 | ||
2153 | /* Update ring dequeue pointer */ | |
2154 | while (ep_ring->dequeue != td->last_trb) | |
3b72fca0 AX |
2155 | inc_deq(xhci, ep_ring); |
2156 | inc_deq(xhci, ep_ring); | |
926008c9 DT |
2157 | |
2158 | return finish_td(xhci, td, NULL, event, ep, status, true); | |
2159 | } | |
2160 | ||
22405ed2 AX |
2161 | /* |
2162 | * Process bulk and interrupt tds, update urb status and actual_length. | |
2163 | */ | |
2164 | static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_td *td, | |
2165 | union xhci_trb *event_trb, struct xhci_transfer_event *event, | |
2166 | struct xhci_virt_ep *ep, int *status) | |
2167 | { | |
2168 | struct xhci_ring *ep_ring; | |
2169 | union xhci_trb *cur_trb; | |
2170 | struct xhci_segment *cur_seg; | |
2171 | u32 trb_comp_code; | |
2172 | ||
28ccd296 ME |
2173 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
2174 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); | |
22405ed2 AX |
2175 | |
2176 | switch (trb_comp_code) { | |
2177 | case COMP_SUCCESS: | |
2178 | /* Double check that the HW transferred everything. */ | |
1530bbc6 | 2179 | if (event_trb != td->last_trb || |
1c11a172 | 2180 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)) != 0) { |
22405ed2 AX |
2181 | xhci_warn(xhci, "WARN Successful completion " |
2182 | "on short TX\n"); | |
2183 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) | |
2184 | *status = -EREMOTEIO; | |
2185 | else | |
2186 | *status = 0; | |
1530bbc6 SS |
2187 | if ((xhci->quirks & XHCI_TRUST_TX_LENGTH)) |
2188 | trb_comp_code = COMP_SHORT_TX; | |
22405ed2 | 2189 | } else { |
22405ed2 AX |
2190 | *status = 0; |
2191 | } | |
2192 | break; | |
40a3b775 | 2193 | case COMP_STOP_SHORT: |
22405ed2 AX |
2194 | case COMP_SHORT_TX: |
2195 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) | |
2196 | *status = -EREMOTEIO; | |
2197 | else | |
2198 | *status = 0; | |
2199 | break; | |
2200 | default: | |
2201 | /* Others already handled above */ | |
2202 | break; | |
2203 | } | |
f444ff27 SS |
2204 | if (trb_comp_code == COMP_SHORT_TX) |
2205 | xhci_dbg(xhci, "ep %#x - asked for %d bytes, " | |
2206 | "%d bytes untransferred\n", | |
2207 | td->urb->ep->desc.bEndpointAddress, | |
2208 | td->urb->transfer_buffer_length, | |
1c11a172 | 2209 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len))); |
40a3b775 LB |
2210 | /* Stopped - short packet completion */ |
2211 | if (trb_comp_code == COMP_STOP_SHORT) { | |
2212 | td->urb->actual_length = | |
2213 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); | |
2214 | ||
2215 | if (td->urb->transfer_buffer_length < | |
2216 | td->urb->actual_length) { | |
2217 | xhci_warn(xhci, "HC gave bad length of %d bytes txed\n", | |
2218 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len))); | |
2219 | td->urb->actual_length = 0; | |
2220 | /* status will be set by usb core for canceled urbs */ | |
2221 | } | |
22405ed2 | 2222 | /* Fast path - was this the last TRB in the TD for this URB? */ |
40a3b775 | 2223 | } else if (event_trb == td->last_trb) { |
1c11a172 | 2224 | if (EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)) != 0) { |
22405ed2 AX |
2225 | td->urb->actual_length = |
2226 | td->urb->transfer_buffer_length - | |
1c11a172 | 2227 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); |
22405ed2 AX |
2228 | if (td->urb->transfer_buffer_length < |
2229 | td->urb->actual_length) { | |
2230 | xhci_warn(xhci, "HC gave bad length " | |
2231 | "of %d bytes left\n", | |
1c11a172 | 2232 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len))); |
22405ed2 AX |
2233 | td->urb->actual_length = 0; |
2234 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) | |
2235 | *status = -EREMOTEIO; | |
2236 | else | |
2237 | *status = 0; | |
2238 | } | |
2239 | /* Don't overwrite a previously set error code */ | |
2240 | if (*status == -EINPROGRESS) { | |
2241 | if (td->urb->transfer_flags & URB_SHORT_NOT_OK) | |
2242 | *status = -EREMOTEIO; | |
2243 | else | |
2244 | *status = 0; | |
2245 | } | |
2246 | } else { | |
2247 | td->urb->actual_length = | |
2248 | td->urb->transfer_buffer_length; | |
2249 | /* Ignore a short packet completion if the | |
2250 | * untransferred length was zero. | |
2251 | */ | |
2252 | if (*status == -EREMOTEIO) | |
2253 | *status = 0; | |
2254 | } | |
2255 | } else { | |
2256 | /* Slow path - walk the list, starting from the dequeue | |
2257 | * pointer, to get the actual length transferred. | |
2258 | */ | |
2259 | td->urb->actual_length = 0; | |
2260 | for (cur_trb = ep_ring->dequeue, cur_seg = ep_ring->deq_seg; | |
2261 | cur_trb != event_trb; | |
2262 | next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) { | |
f5960b69 ME |
2263 | if (!TRB_TYPE_NOOP_LE32(cur_trb->generic.field[3]) && |
2264 | !TRB_TYPE_LINK_LE32(cur_trb->generic.field[3])) | |
22405ed2 | 2265 | td->urb->actual_length += |
28ccd296 | 2266 | TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])); |
22405ed2 AX |
2267 | } |
2268 | /* If the ring didn't stop on a Link or No-op TRB, add | |
2269 | * in the actual bytes transferred from the Normal TRB | |
2270 | */ | |
2271 | if (trb_comp_code != COMP_STOP_INVAL) | |
2272 | td->urb->actual_length += | |
28ccd296 | 2273 | TRB_LEN(le32_to_cpu(cur_trb->generic.field[2])) - |
1c11a172 | 2274 | EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); |
22405ed2 AX |
2275 | } |
2276 | ||
2277 | return finish_td(xhci, td, event_trb, event, ep, status, false); | |
2278 | } | |
2279 | ||
d0e96f5a SS |
2280 | /* |
2281 | * If this function returns an error condition, it means it got a Transfer | |
2282 | * event with a corrupted Slot ID, Endpoint ID, or TRB DMA address. | |
2283 | * At this point, the host controller is probably hosed and should be reset. | |
2284 | */ | |
2285 | static int handle_tx_event(struct xhci_hcd *xhci, | |
2286 | struct xhci_transfer_event *event) | |
ed384bd3 FB |
2287 | __releases(&xhci->lock) |
2288 | __acquires(&xhci->lock) | |
d0e96f5a SS |
2289 | { |
2290 | struct xhci_virt_device *xdev; | |
63a0d9ab | 2291 | struct xhci_virt_ep *ep; |
d0e96f5a | 2292 | struct xhci_ring *ep_ring; |
82d1009f | 2293 | unsigned int slot_id; |
d0e96f5a | 2294 | int ep_index; |
326b4810 | 2295 | struct xhci_td *td = NULL; |
d0e96f5a SS |
2296 | dma_addr_t event_dma; |
2297 | struct xhci_segment *event_seg; | |
2298 | union xhci_trb *event_trb; | |
326b4810 | 2299 | struct urb *urb = NULL; |
d0e96f5a | 2300 | int status = -EINPROGRESS; |
8e51adcc | 2301 | struct urb_priv *urb_priv; |
d115b048 | 2302 | struct xhci_ep_ctx *ep_ctx; |
c2d7b49f | 2303 | struct list_head *tmp; |
66d1eebc | 2304 | u32 trb_comp_code; |
4422da61 | 2305 | int ret = 0; |
c2d7b49f | 2306 | int td_num = 0; |
3b4739b8 | 2307 | bool handling_skipped_tds = false; |
d0e96f5a | 2308 | |
28ccd296 | 2309 | slot_id = TRB_TO_SLOT_ID(le32_to_cpu(event->flags)); |
82d1009f | 2310 | xdev = xhci->devs[slot_id]; |
d0e96f5a SS |
2311 | if (!xdev) { |
2312 | xhci_err(xhci, "ERROR Transfer event pointed to bad slot\n"); | |
9258c0b2 | 2313 | xhci_err(xhci, "@%016llx %08x %08x %08x %08x\n", |
e910b440 SS |
2314 | (unsigned long long) xhci_trb_virt_to_dma( |
2315 | xhci->event_ring->deq_seg, | |
9258c0b2 SS |
2316 | xhci->event_ring->dequeue), |
2317 | lower_32_bits(le64_to_cpu(event->buffer)), | |
2318 | upper_32_bits(le64_to_cpu(event->buffer)), | |
2319 | le32_to_cpu(event->transfer_len), | |
2320 | le32_to_cpu(event->flags)); | |
2321 | xhci_dbg(xhci, "Event ring:\n"); | |
2322 | xhci_debug_segment(xhci, xhci->event_ring->deq_seg); | |
d0e96f5a SS |
2323 | return -ENODEV; |
2324 | } | |
2325 | ||
2326 | /* Endpoint ID is 1 based, our index is zero based */ | |
28ccd296 | 2327 | ep_index = TRB_TO_EP_ID(le32_to_cpu(event->flags)) - 1; |
63a0d9ab | 2328 | ep = &xdev->eps[ep_index]; |
28ccd296 | 2329 | ep_ring = xhci_dma_to_transfer_ring(ep, le64_to_cpu(event->buffer)); |
d115b048 | 2330 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
986a92d4 | 2331 | if (!ep_ring || |
28ccd296 ME |
2332 | (le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK) == |
2333 | EP_STATE_DISABLED) { | |
e9df17eb SS |
2334 | xhci_err(xhci, "ERROR Transfer event for disabled endpoint " |
2335 | "or incorrect stream ring\n"); | |
9258c0b2 | 2336 | xhci_err(xhci, "@%016llx %08x %08x %08x %08x\n", |
e910b440 SS |
2337 | (unsigned long long) xhci_trb_virt_to_dma( |
2338 | xhci->event_ring->deq_seg, | |
9258c0b2 SS |
2339 | xhci->event_ring->dequeue), |
2340 | lower_32_bits(le64_to_cpu(event->buffer)), | |
2341 | upper_32_bits(le64_to_cpu(event->buffer)), | |
2342 | le32_to_cpu(event->transfer_len), | |
2343 | le32_to_cpu(event->flags)); | |
2344 | xhci_dbg(xhci, "Event ring:\n"); | |
2345 | xhci_debug_segment(xhci, xhci->event_ring->deq_seg); | |
d0e96f5a SS |
2346 | return -ENODEV; |
2347 | } | |
2348 | ||
c2d7b49f AX |
2349 | /* Count current td numbers if ep->skip is set */ |
2350 | if (ep->skip) { | |
2351 | list_for_each(tmp, &ep_ring->td_list) | |
2352 | td_num++; | |
2353 | } | |
2354 | ||
28ccd296 ME |
2355 | event_dma = le64_to_cpu(event->buffer); |
2356 | trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len)); | |
986a92d4 | 2357 | /* Look for common error cases */ |
66d1eebc | 2358 | switch (trb_comp_code) { |
b10de142 SS |
2359 | /* Skip codes that require special handling depending on |
2360 | * transfer type | |
2361 | */ | |
2362 | case COMP_SUCCESS: | |
1c11a172 | 2363 | if (EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)) == 0) |
1530bbc6 SS |
2364 | break; |
2365 | if (xhci->quirks & XHCI_TRUST_TX_LENGTH) | |
2366 | trb_comp_code = COMP_SHORT_TX; | |
2367 | else | |
8202ce2e SS |
2368 | xhci_warn_ratelimited(xhci, |
2369 | "WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?\n"); | |
b10de142 SS |
2370 | case COMP_SHORT_TX: |
2371 | break; | |
ae636747 SS |
2372 | case COMP_STOP: |
2373 | xhci_dbg(xhci, "Stopped on Transfer TRB\n"); | |
2374 | break; | |
2375 | case COMP_STOP_INVAL: | |
2376 | xhci_dbg(xhci, "Stopped on No-op or Link TRB\n"); | |
2377 | break; | |
40a3b775 LB |
2378 | case COMP_STOP_SHORT: |
2379 | xhci_dbg(xhci, "Stopped with short packet transfer detected\n"); | |
2380 | break; | |
b10de142 | 2381 | case COMP_STALL: |
2a9227a5 | 2382 | xhci_dbg(xhci, "Stalled endpoint\n"); |
63a0d9ab | 2383 | ep->ep_state |= EP_HALTED; |
b10de142 SS |
2384 | status = -EPIPE; |
2385 | break; | |
2386 | case COMP_TRB_ERR: | |
2387 | xhci_warn(xhci, "WARN: TRB error on endpoint\n"); | |
2388 | status = -EILSEQ; | |
2389 | break; | |
ec74e403 | 2390 | case COMP_SPLIT_ERR: |
b10de142 | 2391 | case COMP_TX_ERR: |
2a9227a5 | 2392 | xhci_dbg(xhci, "Transfer error on endpoint\n"); |
b10de142 SS |
2393 | status = -EPROTO; |
2394 | break; | |
4a73143c | 2395 | case COMP_BABBLE: |
2a9227a5 | 2396 | xhci_dbg(xhci, "Babble error on endpoint\n"); |
4a73143c SS |
2397 | status = -EOVERFLOW; |
2398 | break; | |
b10de142 SS |
2399 | case COMP_DB_ERR: |
2400 | xhci_warn(xhci, "WARN: HC couldn't access mem fast enough\n"); | |
2401 | status = -ENOSR; | |
2402 | break; | |
986a92d4 AX |
2403 | case COMP_BW_OVER: |
2404 | xhci_warn(xhci, "WARN: bandwidth overrun event on endpoint\n"); | |
2405 | break; | |
2406 | case COMP_BUFF_OVER: | |
2407 | xhci_warn(xhci, "WARN: buffer overrun event on endpoint\n"); | |
2408 | break; | |
2409 | case COMP_UNDERRUN: | |
2410 | /* | |
2411 | * When the Isoch ring is empty, the xHC will generate | |
2412 | * a Ring Overrun Event for IN Isoch endpoint or Ring | |
2413 | * Underrun Event for OUT Isoch endpoint. | |
2414 | */ | |
2415 | xhci_dbg(xhci, "underrun event on endpoint\n"); | |
2416 | if (!list_empty(&ep_ring->td_list)) | |
2417 | xhci_dbg(xhci, "Underrun Event for slot %d ep %d " | |
2418 | "still with TDs queued?\n", | |
28ccd296 ME |
2419 | TRB_TO_SLOT_ID(le32_to_cpu(event->flags)), |
2420 | ep_index); | |
986a92d4 AX |
2421 | goto cleanup; |
2422 | case COMP_OVERRUN: | |
2423 | xhci_dbg(xhci, "overrun event on endpoint\n"); | |
2424 | if (!list_empty(&ep_ring->td_list)) | |
2425 | xhci_dbg(xhci, "Overrun Event for slot %d ep %d " | |
2426 | "still with TDs queued?\n", | |
28ccd296 ME |
2427 | TRB_TO_SLOT_ID(le32_to_cpu(event->flags)), |
2428 | ep_index); | |
986a92d4 | 2429 | goto cleanup; |
f6ba6fe2 AH |
2430 | case COMP_DEV_ERR: |
2431 | xhci_warn(xhci, "WARN: detect an incompatible device"); | |
2432 | status = -EPROTO; | |
2433 | break; | |
d18240db AX |
2434 | case COMP_MISSED_INT: |
2435 | /* | |
2436 | * When encounter missed service error, one or more isoc tds | |
2437 | * may be missed by xHC. | |
2438 | * Set skip flag of the ep_ring; Complete the missed tds as | |
2439 | * short transfer when process the ep_ring next time. | |
2440 | */ | |
2441 | ep->skip = true; | |
2442 | xhci_dbg(xhci, "Miss service interval error, set skip flag\n"); | |
2443 | goto cleanup; | |
3b4739b8 MN |
2444 | case COMP_PING_ERR: |
2445 | ep->skip = true; | |
2446 | xhci_dbg(xhci, "No Ping response error, Skip one Isoc TD\n"); | |
2447 | goto cleanup; | |
b10de142 | 2448 | default: |
b45b5069 | 2449 | if (xhci_is_vendor_info_code(xhci, trb_comp_code)) { |
5ad6a529 SS |
2450 | status = 0; |
2451 | break; | |
2452 | } | |
86cd740a MN |
2453 | xhci_warn(xhci, "ERROR Unknown event condition %u, HC probably busted\n", |
2454 | trb_comp_code); | |
986a92d4 AX |
2455 | goto cleanup; |
2456 | } | |
2457 | ||
d18240db AX |
2458 | do { |
2459 | /* This TRB should be in the TD at the head of this ring's | |
2460 | * TD list. | |
2461 | */ | |
2462 | if (list_empty(&ep_ring->td_list)) { | |
a83d6755 SS |
2463 | /* |
2464 | * A stopped endpoint may generate an extra completion | |
2465 | * event if the device was suspended. Don't print | |
2466 | * warnings. | |
2467 | */ | |
2468 | if (!(trb_comp_code == COMP_STOP || | |
2469 | trb_comp_code == COMP_STOP_INVAL)) { | |
2470 | xhci_warn(xhci, "WARN Event TRB for slot %d ep %d with no TDs queued?\n", | |
2471 | TRB_TO_SLOT_ID(le32_to_cpu(event->flags)), | |
2472 | ep_index); | |
2473 | xhci_dbg(xhci, "Event TRB with TRB type ID %u\n", | |
2474 | (le32_to_cpu(event->flags) & | |
2475 | TRB_TYPE_BITMASK)>>10); | |
2476 | xhci_print_trb_offsets(xhci, (union xhci_trb *) event); | |
2477 | } | |
d18240db AX |
2478 | if (ep->skip) { |
2479 | ep->skip = false; | |
2480 | xhci_dbg(xhci, "td_list is empty while skip " | |
2481 | "flag set. Clear skip flag.\n"); | |
2482 | } | |
2483 | ret = 0; | |
2484 | goto cleanup; | |
2485 | } | |
986a92d4 | 2486 | |
c2d7b49f AX |
2487 | /* We've skipped all the TDs on the ep ring when ep->skip set */ |
2488 | if (ep->skip && td_num == 0) { | |
2489 | ep->skip = false; | |
2490 | xhci_dbg(xhci, "All tds on the ep_ring skipped. " | |
2491 | "Clear skip flag.\n"); | |
2492 | ret = 0; | |
2493 | goto cleanup; | |
2494 | } | |
2495 | ||
d18240db | 2496 | td = list_entry(ep_ring->td_list.next, struct xhci_td, td_list); |
c2d7b49f AX |
2497 | if (ep->skip) |
2498 | td_num--; | |
926008c9 | 2499 | |
d18240db | 2500 | /* Is this a TRB in the currently executing TD? */ |
cffb9be8 HG |
2501 | event_seg = trb_in_td(xhci, ep_ring->deq_seg, ep_ring->dequeue, |
2502 | td->last_trb, event_dma, false); | |
e1cf486d AH |
2503 | |
2504 | /* | |
2505 | * Skip the Force Stopped Event. The event_trb(event_dma) of FSE | |
2506 | * is not in the current TD pointed by ep_ring->dequeue because | |
2507 | * that the hardware dequeue pointer still at the previous TRB | |
2508 | * of the current TD. The previous TRB maybe a Link TD or the | |
2509 | * last TRB of the previous TD. The command completion handle | |
2510 | * will take care the rest. | |
2511 | */ | |
9a548863 HG |
2512 | if (!event_seg && (trb_comp_code == COMP_STOP || |
2513 | trb_comp_code == COMP_STOP_INVAL)) { | |
e1cf486d AH |
2514 | ret = 0; |
2515 | goto cleanup; | |
2516 | } | |
2517 | ||
926008c9 DT |
2518 | if (!event_seg) { |
2519 | if (!ep->skip || | |
2520 | !usb_endpoint_xfer_isoc(&td->urb->ep->desc)) { | |
ad808333 SS |
2521 | /* Some host controllers give a spurious |
2522 | * successful event after a short transfer. | |
2523 | * Ignore it. | |
2524 | */ | |
ddba5cd0 | 2525 | if ((xhci->quirks & XHCI_SPURIOUS_SUCCESS) && |
ad808333 SS |
2526 | ep_ring->last_td_was_short) { |
2527 | ep_ring->last_td_was_short = false; | |
2528 | ret = 0; | |
2529 | goto cleanup; | |
2530 | } | |
926008c9 DT |
2531 | /* HC is busted, give up! */ |
2532 | xhci_err(xhci, | |
2533 | "ERROR Transfer event TRB DMA ptr not " | |
cffb9be8 HG |
2534 | "part of current TD ep_index %d " |
2535 | "comp_code %u\n", ep_index, | |
2536 | trb_comp_code); | |
2537 | trb_in_td(xhci, ep_ring->deq_seg, | |
2538 | ep_ring->dequeue, td->last_trb, | |
2539 | event_dma, true); | |
926008c9 DT |
2540 | return -ESHUTDOWN; |
2541 | } | |
2542 | ||
2543 | ret = skip_isoc_td(xhci, td, event, ep, &status); | |
2544 | goto cleanup; | |
2545 | } | |
ad808333 SS |
2546 | if (trb_comp_code == COMP_SHORT_TX) |
2547 | ep_ring->last_td_was_short = true; | |
2548 | else | |
2549 | ep_ring->last_td_was_short = false; | |
926008c9 DT |
2550 | |
2551 | if (ep->skip) { | |
d18240db AX |
2552 | xhci_dbg(xhci, "Found td. Clear skip flag.\n"); |
2553 | ep->skip = false; | |
2554 | } | |
678539cf | 2555 | |
926008c9 DT |
2556 | event_trb = &event_seg->trbs[(event_dma - event_seg->dma) / |
2557 | sizeof(*event_trb)]; | |
2558 | /* | |
2559 | * No-op TRB should not trigger interrupts. | |
2560 | * If event_trb is a no-op TRB, it means the | |
2561 | * corresponding TD has been cancelled. Just ignore | |
2562 | * the TD. | |
2563 | */ | |
f5960b69 | 2564 | if (TRB_TYPE_NOOP_LE32(event_trb->generic.field[3])) { |
926008c9 DT |
2565 | xhci_dbg(xhci, |
2566 | "event_trb is a no-op TRB. Skip it\n"); | |
2567 | goto cleanup; | |
d18240db | 2568 | } |
4422da61 | 2569 | |
d18240db AX |
2570 | /* Now update the urb's actual_length and give back to |
2571 | * the core | |
82d1009f | 2572 | */ |
d18240db AX |
2573 | if (usb_endpoint_xfer_control(&td->urb->ep->desc)) |
2574 | ret = process_ctrl_td(xhci, td, event_trb, event, ep, | |
2575 | &status); | |
04e51901 AX |
2576 | else if (usb_endpoint_xfer_isoc(&td->urb->ep->desc)) |
2577 | ret = process_isoc_td(xhci, td, event_trb, event, ep, | |
2578 | &status); | |
d18240db AX |
2579 | else |
2580 | ret = process_bulk_intr_td(xhci, td, event_trb, event, | |
2581 | ep, &status); | |
2582 | ||
2583 | cleanup: | |
3b4739b8 MN |
2584 | |
2585 | ||
2586 | handling_skipped_tds = ep->skip && | |
2587 | trb_comp_code != COMP_MISSED_INT && | |
2588 | trb_comp_code != COMP_PING_ERR; | |
2589 | ||
d18240db | 2590 | /* |
3b4739b8 MN |
2591 | * Do not update event ring dequeue pointer if we're in a loop |
2592 | * processing missed tds. | |
d18240db | 2593 | */ |
3b4739b8 | 2594 | if (!handling_skipped_tds) |
3b72fca0 | 2595 | inc_deq(xhci, xhci->event_ring); |
d18240db AX |
2596 | |
2597 | if (ret) { | |
2598 | urb = td->urb; | |
8e51adcc | 2599 | urb_priv = urb->hcpriv; |
8e71a322 | 2600 | |
4daf9df5 | 2601 | xhci_urb_free_priv(urb_priv); |
d18240db | 2602 | |
214f76f7 | 2603 | usb_hcd_unlink_urb_from_ep(bus_to_hcd(urb->dev->bus), urb); |
f444ff27 SS |
2604 | if ((urb->actual_length != urb->transfer_buffer_length && |
2605 | (urb->transfer_flags & | |
2606 | URB_SHORT_NOT_OK)) || | |
fd984d24 SS |
2607 | (status != 0 && |
2608 | !usb_endpoint_xfer_isoc(&urb->ep->desc))) | |
f444ff27 | 2609 | xhci_dbg(xhci, "Giveback URB %p, len = %d, " |
1949f9e2 | 2610 | "expected = %d, status = %d\n", |
f444ff27 SS |
2611 | urb, urb->actual_length, |
2612 | urb->transfer_buffer_length, | |
2613 | status); | |
d18240db | 2614 | spin_unlock(&xhci->lock); |
b3df3f9c SS |
2615 | /* EHCI, UHCI, and OHCI always unconditionally set the |
2616 | * urb->status of an isochronous endpoint to 0. | |
2617 | */ | |
2618 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) | |
2619 | status = 0; | |
214f76f7 | 2620 | usb_hcd_giveback_urb(bus_to_hcd(urb->dev->bus), urb, status); |
d18240db AX |
2621 | spin_lock(&xhci->lock); |
2622 | } | |
2623 | ||
2624 | /* | |
2625 | * If ep->skip is set, it means there are missed tds on the | |
2626 | * endpoint ring need to take care of. | |
2627 | * Process them as short transfer until reach the td pointed by | |
2628 | * the event. | |
2629 | */ | |
3b4739b8 | 2630 | } while (handling_skipped_tds); |
d18240db | 2631 | |
d0e96f5a SS |
2632 | return 0; |
2633 | } | |
2634 | ||
0f2a7930 SS |
2635 | /* |
2636 | * This function handles all OS-owned events on the event ring. It may drop | |
2637 | * xhci->lock between event processing (e.g. to pass up port status changes). | |
9dee9a21 ME |
2638 | * Returns >0 for "possibly more events to process" (caller should call again), |
2639 | * otherwise 0 if done. In future, <0 returns should indicate error code. | |
0f2a7930 | 2640 | */ |
9dee9a21 | 2641 | static int xhci_handle_event(struct xhci_hcd *xhci) |
7f84eef0 SS |
2642 | { |
2643 | union xhci_trb *event; | |
0f2a7930 | 2644 | int update_ptrs = 1; |
d0e96f5a | 2645 | int ret; |
7f84eef0 SS |
2646 | |
2647 | if (!xhci->event_ring || !xhci->event_ring->dequeue) { | |
2648 | xhci->error_bitmask |= 1 << 1; | |
9dee9a21 | 2649 | return 0; |
7f84eef0 SS |
2650 | } |
2651 | ||
2652 | event = xhci->event_ring->dequeue; | |
2653 | /* Does the HC or OS own the TRB? */ | |
28ccd296 ME |
2654 | if ((le32_to_cpu(event->event_cmd.flags) & TRB_CYCLE) != |
2655 | xhci->event_ring->cycle_state) { | |
7f84eef0 | 2656 | xhci->error_bitmask |= 1 << 2; |
9dee9a21 | 2657 | return 0; |
7f84eef0 SS |
2658 | } |
2659 | ||
92a3da41 ME |
2660 | /* |
2661 | * Barrier between reading the TRB_CYCLE (valid) flag above and any | |
2662 | * speculative reads of the event's flags/data below. | |
2663 | */ | |
2664 | rmb(); | |
0f2a7930 | 2665 | /* FIXME: Handle more event types. */ |
28ccd296 | 2666 | switch ((le32_to_cpu(event->event_cmd.flags) & TRB_TYPE_BITMASK)) { |
7f84eef0 SS |
2667 | case TRB_TYPE(TRB_COMPLETION): |
2668 | handle_cmd_completion(xhci, &event->event_cmd); | |
2669 | break; | |
0f2a7930 SS |
2670 | case TRB_TYPE(TRB_PORT_STATUS): |
2671 | handle_port_status(xhci, event); | |
2672 | update_ptrs = 0; | |
2673 | break; | |
d0e96f5a SS |
2674 | case TRB_TYPE(TRB_TRANSFER): |
2675 | ret = handle_tx_event(xhci, &event->trans_event); | |
2676 | if (ret < 0) | |
2677 | xhci->error_bitmask |= 1 << 9; | |
2678 | else | |
2679 | update_ptrs = 0; | |
2680 | break; | |
623bef9e SS |
2681 | case TRB_TYPE(TRB_DEV_NOTE): |
2682 | handle_device_notification(xhci, event); | |
2683 | break; | |
7f84eef0 | 2684 | default: |
28ccd296 ME |
2685 | if ((le32_to_cpu(event->event_cmd.flags) & TRB_TYPE_BITMASK) >= |
2686 | TRB_TYPE(48)) | |
0238634d SS |
2687 | handle_vendor_event(xhci, event); |
2688 | else | |
2689 | xhci->error_bitmask |= 1 << 3; | |
7f84eef0 | 2690 | } |
6f5165cf SS |
2691 | /* Any of the above functions may drop and re-acquire the lock, so check |
2692 | * to make sure a watchdog timer didn't mark the host as non-responsive. | |
2693 | */ | |
2694 | if (xhci->xhc_state & XHCI_STATE_DYING) { | |
2695 | xhci_dbg(xhci, "xHCI host dying, returning from " | |
2696 | "event handler.\n"); | |
9dee9a21 | 2697 | return 0; |
6f5165cf | 2698 | } |
7f84eef0 | 2699 | |
c06d68b8 SS |
2700 | if (update_ptrs) |
2701 | /* Update SW event ring dequeue pointer */ | |
3b72fca0 | 2702 | inc_deq(xhci, xhci->event_ring); |
c06d68b8 | 2703 | |
9dee9a21 ME |
2704 | /* Are there more items on the event ring? Caller will call us again to |
2705 | * check. | |
2706 | */ | |
2707 | return 1; | |
7f84eef0 | 2708 | } |
9032cd52 SS |
2709 | |
2710 | /* | |
2711 | * xHCI spec says we can get an interrupt, and if the HC has an error condition, | |
2712 | * we might get bad data out of the event ring. Section 4.10.2.7 has a list of | |
2713 | * indicators of an event TRB error, but we check the status *first* to be safe. | |
2714 | */ | |
2715 | irqreturn_t xhci_irq(struct usb_hcd *hcd) | |
2716 | { | |
2717 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
c21599a3 | 2718 | u32 status; |
bda53145 | 2719 | u64 temp_64; |
c06d68b8 SS |
2720 | union xhci_trb *event_ring_deq; |
2721 | dma_addr_t deq; | |
9032cd52 SS |
2722 | |
2723 | spin_lock(&xhci->lock); | |
9032cd52 | 2724 | /* Check if the xHC generated the interrupt, or the irq is shared */ |
b0ba9720 | 2725 | status = readl(&xhci->op_regs->status); |
c21599a3 | 2726 | if (status == 0xffffffff) |
9032cd52 SS |
2727 | goto hw_died; |
2728 | ||
c21599a3 | 2729 | if (!(status & STS_EINT)) { |
9032cd52 | 2730 | spin_unlock(&xhci->lock); |
9032cd52 SS |
2731 | return IRQ_NONE; |
2732 | } | |
27e0dd4d | 2733 | if (status & STS_FATAL) { |
9032cd52 SS |
2734 | xhci_warn(xhci, "WARNING: Host System Error\n"); |
2735 | xhci_halt(xhci); | |
2736 | hw_died: | |
9032cd52 | 2737 | spin_unlock(&xhci->lock); |
948fa135 | 2738 | return IRQ_HANDLED; |
9032cd52 SS |
2739 | } |
2740 | ||
bda53145 SS |
2741 | /* |
2742 | * Clear the op reg interrupt status first, | |
2743 | * so we can receive interrupts from other MSI-X interrupters. | |
2744 | * Write 1 to clear the interrupt status. | |
2745 | */ | |
27e0dd4d | 2746 | status |= STS_EINT; |
204b7793 | 2747 | writel(status, &xhci->op_regs->status); |
bda53145 SS |
2748 | /* FIXME when MSI-X is supported and there are multiple vectors */ |
2749 | /* Clear the MSI-X event interrupt status */ | |
2750 | ||
cd70469d | 2751 | if (hcd->irq) { |
c21599a3 SS |
2752 | u32 irq_pending; |
2753 | /* Acknowledge the PCI interrupt */ | |
b0ba9720 | 2754 | irq_pending = readl(&xhci->ir_set->irq_pending); |
4e833c0b | 2755 | irq_pending |= IMAN_IP; |
204b7793 | 2756 | writel(irq_pending, &xhci->ir_set->irq_pending); |
c21599a3 | 2757 | } |
bda53145 | 2758 | |
27a41a83 GKB |
2759 | if (xhci->xhc_state & XHCI_STATE_DYING || |
2760 | xhci->xhc_state & XHCI_STATE_HALTED) { | |
bda53145 SS |
2761 | xhci_dbg(xhci, "xHCI dying, ignoring interrupt. " |
2762 | "Shouldn't IRQs be disabled?\n"); | |
c06d68b8 SS |
2763 | /* Clear the event handler busy flag (RW1C); |
2764 | * the event ring should be empty. | |
bda53145 | 2765 | */ |
f7b2e403 | 2766 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
477632df SS |
2767 | xhci_write_64(xhci, temp_64 | ERST_EHB, |
2768 | &xhci->ir_set->erst_dequeue); | |
c06d68b8 SS |
2769 | spin_unlock(&xhci->lock); |
2770 | ||
2771 | return IRQ_HANDLED; | |
2772 | } | |
2773 | ||
2774 | event_ring_deq = xhci->event_ring->dequeue; | |
2775 | /* FIXME this should be a delayed service routine | |
2776 | * that clears the EHB. | |
2777 | */ | |
9dee9a21 | 2778 | while (xhci_handle_event(xhci) > 0) {} |
bda53145 | 2779 | |
f7b2e403 | 2780 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
c06d68b8 SS |
2781 | /* If necessary, update the HW's version of the event ring deq ptr. */ |
2782 | if (event_ring_deq != xhci->event_ring->dequeue) { | |
2783 | deq = xhci_trb_virt_to_dma(xhci->event_ring->deq_seg, | |
2784 | xhci->event_ring->dequeue); | |
2785 | if (deq == 0) | |
2786 | xhci_warn(xhci, "WARN something wrong with SW event " | |
2787 | "ring dequeue ptr.\n"); | |
2788 | /* Update HC event ring dequeue pointer */ | |
2789 | temp_64 &= ERST_PTR_MASK; | |
2790 | temp_64 |= ((u64) deq & (u64) ~ERST_PTR_MASK); | |
2791 | } | |
2792 | ||
2793 | /* Clear the event handler busy flag (RW1C); event ring is empty. */ | |
2794 | temp_64 |= ERST_EHB; | |
477632df | 2795 | xhci_write_64(xhci, temp_64, &xhci->ir_set->erst_dequeue); |
c06d68b8 | 2796 | |
9032cd52 SS |
2797 | spin_unlock(&xhci->lock); |
2798 | ||
2799 | return IRQ_HANDLED; | |
2800 | } | |
2801 | ||
851ec164 | 2802 | irqreturn_t xhci_msi_irq(int irq, void *hcd) |
9032cd52 | 2803 | { |
968b822c | 2804 | return xhci_irq(hcd); |
9032cd52 | 2805 | } |
7f84eef0 | 2806 | |
d0e96f5a SS |
2807 | /**** Endpoint Ring Operations ****/ |
2808 | ||
7f84eef0 SS |
2809 | /* |
2810 | * Generic function for queueing a TRB on a ring. | |
2811 | * The caller must have checked to make sure there's room on the ring. | |
6cc30d85 SS |
2812 | * |
2813 | * @more_trbs_coming: Will you enqueue more TRBs before calling | |
2814 | * prepare_transfer()? | |
7f84eef0 SS |
2815 | */ |
2816 | static void queue_trb(struct xhci_hcd *xhci, struct xhci_ring *ring, | |
3b72fca0 | 2817 | bool more_trbs_coming, |
7f84eef0 SS |
2818 | u32 field1, u32 field2, u32 field3, u32 field4) |
2819 | { | |
2820 | struct xhci_generic_trb *trb; | |
2821 | ||
2822 | trb = &ring->enqueue->generic; | |
28ccd296 ME |
2823 | trb->field[0] = cpu_to_le32(field1); |
2824 | trb->field[1] = cpu_to_le32(field2); | |
2825 | trb->field[2] = cpu_to_le32(field3); | |
2826 | trb->field[3] = cpu_to_le32(field4); | |
3b72fca0 | 2827 | inc_enq(xhci, ring, more_trbs_coming); |
7f84eef0 SS |
2828 | } |
2829 | ||
d0e96f5a SS |
2830 | /* |
2831 | * Does various checks on the endpoint ring, and makes it ready to queue num_trbs. | |
2832 | * FIXME allocate segments if the ring is full. | |
2833 | */ | |
2834 | static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring, | |
3b72fca0 | 2835 | u32 ep_state, unsigned int num_trbs, gfp_t mem_flags) |
d0e96f5a | 2836 | { |
8dfec614 AX |
2837 | unsigned int num_trbs_needed; |
2838 | ||
d0e96f5a | 2839 | /* Make sure the endpoint has been added to xHC schedule */ |
d0e96f5a SS |
2840 | switch (ep_state) { |
2841 | case EP_STATE_DISABLED: | |
2842 | /* | |
2843 | * USB core changed config/interfaces without notifying us, | |
2844 | * or hardware is reporting the wrong state. | |
2845 | */ | |
2846 | xhci_warn(xhci, "WARN urb submitted to disabled ep\n"); | |
2847 | return -ENOENT; | |
d0e96f5a | 2848 | case EP_STATE_ERROR: |
c92bcfa7 | 2849 | xhci_warn(xhci, "WARN waiting for error on ep to be cleared\n"); |
d0e96f5a SS |
2850 | /* FIXME event handling code for error needs to clear it */ |
2851 | /* XXX not sure if this should be -ENOENT or not */ | |
2852 | return -EINVAL; | |
c92bcfa7 SS |
2853 | case EP_STATE_HALTED: |
2854 | xhci_dbg(xhci, "WARN halted endpoint, queueing URB anyway.\n"); | |
d0e96f5a SS |
2855 | case EP_STATE_STOPPED: |
2856 | case EP_STATE_RUNNING: | |
2857 | break; | |
2858 | default: | |
2859 | xhci_err(xhci, "ERROR unknown endpoint state for ep\n"); | |
2860 | /* | |
2861 | * FIXME issue Configure Endpoint command to try to get the HC | |
2862 | * back into a known state. | |
2863 | */ | |
2864 | return -EINVAL; | |
2865 | } | |
8dfec614 AX |
2866 | |
2867 | while (1) { | |
3d4b81ed SS |
2868 | if (room_on_ring(xhci, ep_ring, num_trbs)) |
2869 | break; | |
8dfec614 AX |
2870 | |
2871 | if (ep_ring == xhci->cmd_ring) { | |
2872 | xhci_err(xhci, "Do not support expand command ring\n"); | |
2873 | return -ENOMEM; | |
2874 | } | |
2875 | ||
68ffb011 XR |
2876 | xhci_dbg_trace(xhci, trace_xhci_dbg_ring_expansion, |
2877 | "ERROR no room on ep ring, try ring expansion"); | |
8dfec614 AX |
2878 | num_trbs_needed = num_trbs - ep_ring->num_trbs_free; |
2879 | if (xhci_ring_expansion(xhci, ep_ring, num_trbs_needed, | |
2880 | mem_flags)) { | |
2881 | xhci_err(xhci, "Ring expansion failed\n"); | |
2882 | return -ENOMEM; | |
2883 | } | |
261fa12b | 2884 | } |
6c12db90 | 2885 | |
d0c77d84 MN |
2886 | while (trb_is_link(ep_ring->enqueue)) { |
2887 | /* If we're not dealing with 0.95 hardware or isoc rings | |
2888 | * on AMD 0.96 host, clear the chain bit. | |
2889 | */ | |
2890 | if (!xhci_link_trb_quirk(xhci) && | |
2891 | !(ep_ring->type == TYPE_ISOC && | |
2892 | (xhci->quirks & XHCI_AMD_0x96_HOST))) | |
2893 | ep_ring->enqueue->link.control &= | |
2894 | cpu_to_le32(~TRB_CHAIN); | |
2895 | else | |
2896 | ep_ring->enqueue->link.control |= | |
2897 | cpu_to_le32(TRB_CHAIN); | |
6c12db90 | 2898 | |
d0c77d84 MN |
2899 | wmb(); |
2900 | ep_ring->enqueue->link.control ^= cpu_to_le32(TRB_CYCLE); | |
6c12db90 | 2901 | |
d0c77d84 MN |
2902 | /* Toggle the cycle bit after the last ring segment. */ |
2903 | if (link_trb_toggles_cycle(ep_ring->enqueue)) | |
2904 | ep_ring->cycle_state ^= 1; | |
6c12db90 | 2905 | |
d0c77d84 MN |
2906 | ep_ring->enq_seg = ep_ring->enq_seg->next; |
2907 | ep_ring->enqueue = ep_ring->enq_seg->trbs; | |
6c12db90 | 2908 | } |
d0e96f5a SS |
2909 | return 0; |
2910 | } | |
2911 | ||
23e3be11 | 2912 | static int prepare_transfer(struct xhci_hcd *xhci, |
d0e96f5a SS |
2913 | struct xhci_virt_device *xdev, |
2914 | unsigned int ep_index, | |
e9df17eb | 2915 | unsigned int stream_id, |
d0e96f5a SS |
2916 | unsigned int num_trbs, |
2917 | struct urb *urb, | |
8e51adcc | 2918 | unsigned int td_index, |
d0e96f5a SS |
2919 | gfp_t mem_flags) |
2920 | { | |
2921 | int ret; | |
8e51adcc AX |
2922 | struct urb_priv *urb_priv; |
2923 | struct xhci_td *td; | |
e9df17eb | 2924 | struct xhci_ring *ep_ring; |
d115b048 | 2925 | struct xhci_ep_ctx *ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); |
e9df17eb SS |
2926 | |
2927 | ep_ring = xhci_stream_id_to_ring(xdev, ep_index, stream_id); | |
2928 | if (!ep_ring) { | |
2929 | xhci_dbg(xhci, "Can't prepare ring for bad stream ID %u\n", | |
2930 | stream_id); | |
2931 | return -EINVAL; | |
2932 | } | |
2933 | ||
2934 | ret = prepare_ring(xhci, ep_ring, | |
28ccd296 | 2935 | le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK, |
3b72fca0 | 2936 | num_trbs, mem_flags); |
d0e96f5a SS |
2937 | if (ret) |
2938 | return ret; | |
d0e96f5a | 2939 | |
8e51adcc AX |
2940 | urb_priv = urb->hcpriv; |
2941 | td = urb_priv->td[td_index]; | |
2942 | ||
2943 | INIT_LIST_HEAD(&td->td_list); | |
2944 | INIT_LIST_HEAD(&td->cancelled_td_list); | |
2945 | ||
2946 | if (td_index == 0) { | |
214f76f7 | 2947 | ret = usb_hcd_link_urb_to_ep(bus_to_hcd(urb->dev->bus), urb); |
d13565c1 | 2948 | if (unlikely(ret)) |
8e51adcc | 2949 | return ret; |
d0e96f5a SS |
2950 | } |
2951 | ||
8e51adcc | 2952 | td->urb = urb; |
d0e96f5a | 2953 | /* Add this TD to the tail of the endpoint ring's TD list */ |
8e51adcc AX |
2954 | list_add_tail(&td->td_list, &ep_ring->td_list); |
2955 | td->start_seg = ep_ring->enq_seg; | |
2956 | td->first_trb = ep_ring->enqueue; | |
2957 | ||
2958 | urb_priv->td[td_index] = td; | |
d0e96f5a SS |
2959 | |
2960 | return 0; | |
2961 | } | |
2962 | ||
d2510342 AI |
2963 | static unsigned int count_trbs(u64 addr, u64 len) |
2964 | { | |
2965 | unsigned int num_trbs; | |
2966 | ||
2967 | num_trbs = DIV_ROUND_UP(len + (addr & (TRB_MAX_BUFF_SIZE - 1)), | |
2968 | TRB_MAX_BUFF_SIZE); | |
2969 | if (num_trbs == 0) | |
2970 | num_trbs++; | |
2971 | ||
2972 | return num_trbs; | |
2973 | } | |
2974 | ||
2975 | static inline unsigned int count_trbs_needed(struct urb *urb) | |
2976 | { | |
2977 | return count_trbs(urb->transfer_dma, urb->transfer_buffer_length); | |
2978 | } | |
2979 | ||
2980 | static unsigned int count_sg_trbs_needed(struct urb *urb) | |
8a96c052 | 2981 | { |
8a96c052 | 2982 | struct scatterlist *sg; |
d2510342 | 2983 | unsigned int i, len, full_len, num_trbs = 0; |
8a96c052 | 2984 | |
d2510342 | 2985 | full_len = urb->transfer_buffer_length; |
8a96c052 | 2986 | |
d2510342 AI |
2987 | for_each_sg(urb->sg, sg, urb->num_mapped_sgs, i) { |
2988 | len = sg_dma_len(sg); | |
2989 | num_trbs += count_trbs(sg_dma_address(sg), len); | |
2990 | len = min_t(unsigned int, len, full_len); | |
2991 | full_len -= len; | |
2992 | if (full_len == 0) | |
8a96c052 SS |
2993 | break; |
2994 | } | |
d2510342 | 2995 | |
8a96c052 SS |
2996 | return num_trbs; |
2997 | } | |
2998 | ||
d2510342 AI |
2999 | static unsigned int count_isoc_trbs_needed(struct urb *urb, int i) |
3000 | { | |
3001 | u64 addr, len; | |
3002 | ||
3003 | addr = (u64) (urb->transfer_dma + urb->iso_frame_desc[i].offset); | |
3004 | len = urb->iso_frame_desc[i].length; | |
3005 | ||
3006 | return count_trbs(addr, len); | |
3007 | } | |
3008 | ||
3009 | static void check_trb_math(struct urb *urb, int running_total) | |
8a96c052 | 3010 | { |
d2510342 | 3011 | if (unlikely(running_total != urb->transfer_buffer_length)) |
a2490187 | 3012 | dev_err(&urb->dev->dev, "%s - ep %#x - Miscalculated tx length, " |
8a96c052 SS |
3013 | "queued %#x (%d), asked for %#x (%d)\n", |
3014 | __func__, | |
3015 | urb->ep->desc.bEndpointAddress, | |
3016 | running_total, running_total, | |
3017 | urb->transfer_buffer_length, | |
3018 | urb->transfer_buffer_length); | |
3019 | } | |
3020 | ||
23e3be11 | 3021 | static void giveback_first_trb(struct xhci_hcd *xhci, int slot_id, |
e9df17eb | 3022 | unsigned int ep_index, unsigned int stream_id, int start_cycle, |
e1eab2e0 | 3023 | struct xhci_generic_trb *start_trb) |
8a96c052 | 3024 | { |
8a96c052 SS |
3025 | /* |
3026 | * Pass all the TRBs to the hardware at once and make sure this write | |
3027 | * isn't reordered. | |
3028 | */ | |
3029 | wmb(); | |
50f7b52a | 3030 | if (start_cycle) |
28ccd296 | 3031 | start_trb->field[3] |= cpu_to_le32(start_cycle); |
50f7b52a | 3032 | else |
28ccd296 | 3033 | start_trb->field[3] &= cpu_to_le32(~TRB_CYCLE); |
be88fe4f | 3034 | xhci_ring_ep_doorbell(xhci, slot_id, ep_index, stream_id); |
8a96c052 SS |
3035 | } |
3036 | ||
78140156 AI |
3037 | static void check_interval(struct xhci_hcd *xhci, struct urb *urb, |
3038 | struct xhci_ep_ctx *ep_ctx) | |
624defa1 | 3039 | { |
624defa1 SS |
3040 | int xhci_interval; |
3041 | int ep_interval; | |
3042 | ||
28ccd296 | 3043 | xhci_interval = EP_INTERVAL_TO_UFRAMES(le32_to_cpu(ep_ctx->ep_info)); |
624defa1 | 3044 | ep_interval = urb->interval; |
78140156 | 3045 | |
624defa1 SS |
3046 | /* Convert to microframes */ |
3047 | if (urb->dev->speed == USB_SPEED_LOW || | |
3048 | urb->dev->speed == USB_SPEED_FULL) | |
3049 | ep_interval *= 8; | |
78140156 | 3050 | |
624defa1 SS |
3051 | /* FIXME change this to a warning and a suggestion to use the new API |
3052 | * to set the polling interval (once the API is added). | |
3053 | */ | |
3054 | if (xhci_interval != ep_interval) { | |
0730d52a DK |
3055 | dev_dbg_ratelimited(&urb->dev->dev, |
3056 | "Driver uses different interval (%d microframe%s) than xHCI (%d microframe%s)\n", | |
3057 | ep_interval, ep_interval == 1 ? "" : "s", | |
3058 | xhci_interval, xhci_interval == 1 ? "" : "s"); | |
624defa1 SS |
3059 | urb->interval = xhci_interval; |
3060 | /* Convert back to frames for LS/FS devices */ | |
3061 | if (urb->dev->speed == USB_SPEED_LOW || | |
3062 | urb->dev->speed == USB_SPEED_FULL) | |
3063 | urb->interval /= 8; | |
3064 | } | |
78140156 AI |
3065 | } |
3066 | ||
3067 | /* | |
3068 | * xHCI uses normal TRBs for both bulk and interrupt. When the interrupt | |
3069 | * endpoint is to be serviced, the xHC will consume (at most) one TD. A TD | |
3070 | * (comprised of sg list entries) can take several service intervals to | |
3071 | * transmit. | |
3072 | */ | |
3073 | int xhci_queue_intr_tx(struct xhci_hcd *xhci, gfp_t mem_flags, | |
3074 | struct urb *urb, int slot_id, unsigned int ep_index) | |
3075 | { | |
3076 | struct xhci_ep_ctx *ep_ctx; | |
3077 | ||
3078 | ep_ctx = xhci_get_ep_ctx(xhci, xhci->devs[slot_id]->out_ctx, ep_index); | |
3079 | check_interval(xhci, urb, ep_ctx); | |
3080 | ||
3fc8206d | 3081 | return xhci_queue_bulk_tx(xhci, mem_flags, urb, slot_id, ep_index); |
624defa1 SS |
3082 | } |
3083 | ||
4da6e6f2 | 3084 | /* |
4525c0a1 SS |
3085 | * For xHCI 1.0 host controllers, TD size is the number of max packet sized |
3086 | * packets remaining in the TD (*not* including this TRB). | |
4da6e6f2 SS |
3087 | * |
3088 | * Total TD packet count = total_packet_count = | |
4525c0a1 | 3089 | * DIV_ROUND_UP(TD size in bytes / wMaxPacketSize) |
4da6e6f2 SS |
3090 | * |
3091 | * Packets transferred up to and including this TRB = packets_transferred = | |
3092 | * rounddown(total bytes transferred including this TRB / wMaxPacketSize) | |
3093 | * | |
3094 | * TD size = total_packet_count - packets_transferred | |
3095 | * | |
c840d6ce MN |
3096 | * For xHCI 0.96 and older, TD size field should be the remaining bytes |
3097 | * including this TRB, right shifted by 10 | |
3098 | * | |
3099 | * For all hosts it must fit in bits 21:17, so it can't be bigger than 31. | |
3100 | * This is taken care of in the TRB_TD_SIZE() macro | |
3101 | * | |
4525c0a1 | 3102 | * The last TRB in a TD must have the TD size set to zero. |
4da6e6f2 | 3103 | */ |
c840d6ce MN |
3104 | static u32 xhci_td_remainder(struct xhci_hcd *xhci, int transferred, |
3105 | int trb_buff_len, unsigned int td_total_len, | |
124c3937 | 3106 | struct urb *urb, bool more_trbs_coming) |
4da6e6f2 | 3107 | { |
c840d6ce MN |
3108 | u32 maxp, total_packet_count; |
3109 | ||
0cbd4b34 CY |
3110 | /* MTK xHCI is mostly 0.97 but contains some features from 1.0 */ |
3111 | if (xhci->hci_version < 0x100 && !(xhci->quirks & XHCI_MTK_HOST)) | |
c840d6ce MN |
3112 | return ((td_total_len - transferred) >> 10); |
3113 | ||
48df4a6f | 3114 | /* One TRB with a zero-length data packet. */ |
124c3937 | 3115 | if (!more_trbs_coming || (transferred == 0 && trb_buff_len == 0) || |
c840d6ce | 3116 | trb_buff_len == td_total_len) |
48df4a6f SS |
3117 | return 0; |
3118 | ||
0cbd4b34 CY |
3119 | /* for MTK xHCI, TD size doesn't include this TRB */ |
3120 | if (xhci->quirks & XHCI_MTK_HOST) | |
3121 | trb_buff_len = 0; | |
3122 | ||
3123 | maxp = GET_MAX_PACKET(usb_endpoint_maxp(&urb->ep->desc)); | |
3124 | total_packet_count = DIV_ROUND_UP(td_total_len, maxp); | |
3125 | ||
c840d6ce MN |
3126 | /* Queueing functions don't count the current TRB into transferred */ |
3127 | return (total_packet_count - ((transferred + trb_buff_len) / maxp)); | |
4da6e6f2 SS |
3128 | } |
3129 | ||
f9c589e1 | 3130 | |
474ed23a | 3131 | static int xhci_align_td(struct xhci_hcd *xhci, struct urb *urb, u32 enqd_len, |
f9c589e1 | 3132 | u32 *trb_buff_len, struct xhci_segment *seg) |
474ed23a | 3133 | { |
f9c589e1 | 3134 | struct device *dev = xhci_to_hcd(xhci)->self.controller; |
474ed23a MN |
3135 | unsigned int unalign; |
3136 | unsigned int max_pkt; | |
f9c589e1 | 3137 | u32 new_buff_len; |
474ed23a MN |
3138 | |
3139 | max_pkt = GET_MAX_PACKET(usb_endpoint_maxp(&urb->ep->desc)); | |
3140 | unalign = (enqd_len + *trb_buff_len) % max_pkt; | |
3141 | ||
3142 | /* we got lucky, last normal TRB data on segment is packet aligned */ | |
3143 | if (unalign == 0) | |
3144 | return 0; | |
3145 | ||
f9c589e1 MN |
3146 | xhci_dbg(xhci, "Unaligned %d bytes, buff len %d\n", |
3147 | unalign, *trb_buff_len); | |
3148 | ||
474ed23a MN |
3149 | /* is the last nornal TRB alignable by splitting it */ |
3150 | if (*trb_buff_len > unalign) { | |
3151 | *trb_buff_len -= unalign; | |
f9c589e1 | 3152 | xhci_dbg(xhci, "split align, new buff len %d\n", *trb_buff_len); |
474ed23a MN |
3153 | return 0; |
3154 | } | |
f9c589e1 MN |
3155 | |
3156 | /* | |
3157 | * We want enqd_len + trb_buff_len to sum up to a number aligned to | |
3158 | * number which is divisible by the endpoint's wMaxPacketSize. IOW: | |
3159 | * (size of currently enqueued TRBs + remainder) % wMaxPacketSize == 0. | |
3160 | */ | |
3161 | new_buff_len = max_pkt - (enqd_len % max_pkt); | |
3162 | ||
3163 | if (new_buff_len > (urb->transfer_buffer_length - enqd_len)) | |
3164 | new_buff_len = (urb->transfer_buffer_length - enqd_len); | |
3165 | ||
3166 | /* create a max max_pkt sized bounce buffer pointed to by last trb */ | |
3167 | if (usb_urb_dir_out(urb)) { | |
3168 | sg_pcopy_to_buffer(urb->sg, urb->num_mapped_sgs, | |
3169 | seg->bounce_buf, new_buff_len, enqd_len); | |
3170 | seg->bounce_dma = dma_map_single(dev, seg->bounce_buf, | |
3171 | max_pkt, DMA_TO_DEVICE); | |
3172 | } else { | |
3173 | seg->bounce_dma = dma_map_single(dev, seg->bounce_buf, | |
3174 | max_pkt, DMA_FROM_DEVICE); | |
3175 | } | |
3176 | ||
3177 | if (dma_mapping_error(dev, seg->bounce_dma)) { | |
3178 | /* try without aligning. Some host controllers survive */ | |
3179 | xhci_warn(xhci, "Failed mapping bounce buffer, not aligning\n"); | |
3180 | return 0; | |
3181 | } | |
3182 | *trb_buff_len = new_buff_len; | |
3183 | seg->bounce_len = new_buff_len; | |
3184 | seg->bounce_offs = enqd_len; | |
3185 | ||
3186 | xhci_dbg(xhci, "Bounce align, new buff len %d\n", *trb_buff_len); | |
3187 | ||
474ed23a MN |
3188 | return 1; |
3189 | } | |
3190 | ||
d2510342 AI |
3191 | /* This is very similar to what ehci-q.c qtd_fill() does */ |
3192 | int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, | |
8a96c052 SS |
3193 | struct urb *urb, int slot_id, unsigned int ep_index) |
3194 | { | |
5a5a0b1a | 3195 | struct xhci_ring *ring; |
8e51adcc | 3196 | struct urb_priv *urb_priv; |
8a96c052 | 3197 | struct xhci_td *td; |
d2510342 AI |
3198 | struct xhci_generic_trb *start_trb; |
3199 | struct scatterlist *sg = NULL; | |
5a83f04a MN |
3200 | bool more_trbs_coming = true; |
3201 | bool need_zero_pkt = false; | |
86065c27 MN |
3202 | bool first_trb = true; |
3203 | unsigned int num_trbs; | |
d2510342 | 3204 | unsigned int start_cycle, num_sgs = 0; |
86065c27 | 3205 | unsigned int enqd_len, block_len, trb_buff_len, full_len; |
f9c589e1 | 3206 | int sent_len, ret; |
d2510342 | 3207 | u32 field, length_field, remainder; |
f9c589e1 | 3208 | u64 addr, send_addr; |
8a96c052 | 3209 | |
5a5a0b1a MN |
3210 | ring = xhci_urb_to_transfer_ring(xhci, urb); |
3211 | if (!ring) | |
e9df17eb SS |
3212 | return -EINVAL; |
3213 | ||
86065c27 | 3214 | full_len = urb->transfer_buffer_length; |
d2510342 AI |
3215 | /* If we have scatter/gather list, we use it. */ |
3216 | if (urb->num_sgs) { | |
3217 | num_sgs = urb->num_mapped_sgs; | |
3218 | sg = urb->sg; | |
86065c27 MN |
3219 | addr = (u64) sg_dma_address(sg); |
3220 | block_len = sg_dma_len(sg); | |
d2510342 | 3221 | num_trbs = count_sg_trbs_needed(urb); |
86065c27 | 3222 | } else { |
d2510342 | 3223 | num_trbs = count_trbs_needed(urb); |
86065c27 MN |
3224 | addr = (u64) urb->transfer_dma; |
3225 | block_len = full_len; | |
3226 | } | |
4758dcd1 | 3227 | ret = prepare_transfer(xhci, xhci->devs[slot_id], |
e9df17eb | 3228 | ep_index, urb->stream_id, |
3b72fca0 | 3229 | num_trbs, urb, 0, mem_flags); |
d2510342 | 3230 | if (unlikely(ret < 0)) |
4758dcd1 | 3231 | return ret; |
8e51adcc AX |
3232 | |
3233 | urb_priv = urb->hcpriv; | |
4758dcd1 RA |
3234 | |
3235 | /* Deal with URB_ZERO_PACKET - need one more td/trb */ | |
5a83f04a MN |
3236 | if (urb->transfer_flags & URB_ZERO_PACKET && urb_priv->length > 1) |
3237 | need_zero_pkt = true; | |
4758dcd1 | 3238 | |
8e51adcc AX |
3239 | td = urb_priv->td[0]; |
3240 | ||
8a96c052 SS |
3241 | /* |
3242 | * Don't give the first TRB to the hardware (by toggling the cycle bit) | |
3243 | * until we've finished creating all the other TRBs. The ring's cycle | |
3244 | * state may change as we enqueue the other TRBs, so save it too. | |
3245 | */ | |
5a5a0b1a MN |
3246 | start_trb = &ring->enqueue->generic; |
3247 | start_cycle = ring->cycle_state; | |
f9c589e1 | 3248 | send_addr = addr; |
8a96c052 | 3249 | |
d2510342 | 3250 | /* Queue the TRBs, even if they are zero-length */ |
0d2daade AB |
3251 | for (enqd_len = 0; first_trb || enqd_len < full_len; |
3252 | enqd_len += trb_buff_len) { | |
d2510342 | 3253 | field = TRB_TYPE(TRB_NORMAL); |
af8b9e63 | 3254 | |
86065c27 MN |
3255 | /* TRB buffer should not cross 64KB boundaries */ |
3256 | trb_buff_len = TRB_BUFF_LEN_UP_TO_BOUNDARY(addr); | |
3257 | trb_buff_len = min_t(unsigned int, trb_buff_len, block_len); | |
8a96c052 | 3258 | |
86065c27 MN |
3259 | if (enqd_len + trb_buff_len > full_len) |
3260 | trb_buff_len = full_len - enqd_len; | |
b10de142 SS |
3261 | |
3262 | /* Don't change the cycle bit of the first TRB until later */ | |
86065c27 MN |
3263 | if (first_trb) { |
3264 | first_trb = false; | |
50f7b52a | 3265 | if (start_cycle == 0) |
d2510342 | 3266 | field |= TRB_CYCLE; |
50f7b52a | 3267 | } else |
5a5a0b1a | 3268 | field |= ring->cycle_state; |
b10de142 SS |
3269 | |
3270 | /* Chain all the TRBs together; clear the chain bit in the last | |
3271 | * TRB to indicate it's the last TRB in the chain. | |
3272 | */ | |
86065c27 | 3273 | if (enqd_len + trb_buff_len < full_len) { |
b10de142 | 3274 | field |= TRB_CHAIN; |
2d98ef40 | 3275 | if (trb_is_link(ring->enqueue + 1)) { |
474ed23a | 3276 | if (xhci_align_td(xhci, urb, enqd_len, |
f9c589e1 MN |
3277 | &trb_buff_len, |
3278 | ring->enq_seg)) { | |
3279 | send_addr = ring->enq_seg->bounce_dma; | |
3280 | /* assuming TD won't span 2 segs */ | |
3281 | td->bounce_seg = ring->enq_seg; | |
3282 | } | |
474ed23a | 3283 | } |
f9c589e1 MN |
3284 | } |
3285 | if (enqd_len + trb_buff_len >= full_len) { | |
3286 | field &= ~TRB_CHAIN; | |
4758dcd1 | 3287 | field |= TRB_IOC; |
124c3937 | 3288 | more_trbs_coming = false; |
5a83f04a | 3289 | td->last_trb = ring->enqueue; |
b10de142 | 3290 | } |
af8b9e63 SS |
3291 | |
3292 | /* Only set interrupt on short packet for IN endpoints */ | |
3293 | if (usb_urb_dir_in(urb)) | |
3294 | field |= TRB_ISP; | |
3295 | ||
4da6e6f2 | 3296 | /* Set the TRB length, TD size, and interrupter fields. */ |
86065c27 MN |
3297 | remainder = xhci_td_remainder(xhci, enqd_len, trb_buff_len, |
3298 | full_len, urb, more_trbs_coming); | |
3299 | ||
f9dc68fe | 3300 | length_field = TRB_LEN(trb_buff_len) | |
c840d6ce | 3301 | TRB_TD_SIZE(remainder) | |
f9dc68fe | 3302 | TRB_INTR_TARGET(0); |
4da6e6f2 | 3303 | |
124c3937 | 3304 | queue_trb(xhci, ring, more_trbs_coming | need_zero_pkt, |
f9c589e1 MN |
3305 | lower_32_bits(send_addr), |
3306 | upper_32_bits(send_addr), | |
f9dc68fe | 3307 | length_field, |
d2510342 | 3308 | field); |
b10de142 | 3309 | |
b10de142 | 3310 | addr += trb_buff_len; |
f9c589e1 | 3311 | sent_len = trb_buff_len; |
d2510342 | 3312 | |
f9c589e1 | 3313 | while (sg && sent_len >= block_len) { |
86065c27 MN |
3314 | /* New sg entry */ |
3315 | --num_sgs; | |
f9c589e1 | 3316 | sent_len -= block_len; |
86065c27 | 3317 | if (num_sgs != 0) { |
d2510342 | 3318 | sg = sg_next(sg); |
86065c27 MN |
3319 | block_len = sg_dma_len(sg); |
3320 | addr = (u64) sg_dma_address(sg); | |
f9c589e1 | 3321 | addr += sent_len; |
d2510342 AI |
3322 | } |
3323 | } | |
f9c589e1 MN |
3324 | block_len -= sent_len; |
3325 | send_addr = addr; | |
d2510342 | 3326 | } |
b10de142 | 3327 | |
5a83f04a MN |
3328 | if (need_zero_pkt) { |
3329 | ret = prepare_transfer(xhci, xhci->devs[slot_id], | |
3330 | ep_index, urb->stream_id, | |
3331 | 1, urb, 1, mem_flags); | |
3332 | urb_priv->td[1]->last_trb = ring->enqueue; | |
3333 | field = TRB_TYPE(TRB_NORMAL) | ring->cycle_state | TRB_IOC; | |
3334 | queue_trb(xhci, ring, 0, 0, 0, TRB_INTR_TARGET(0), field); | |
3335 | } | |
3336 | ||
86065c27 | 3337 | check_trb_math(urb, enqd_len); |
e9df17eb | 3338 | giveback_first_trb(xhci, slot_id, ep_index, urb->stream_id, |
e1eab2e0 | 3339 | start_cycle, start_trb); |
b10de142 SS |
3340 | return 0; |
3341 | } | |
3342 | ||
d0e96f5a | 3343 | /* Caller must have locked xhci->lock */ |
23e3be11 | 3344 | int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags, |
d0e96f5a SS |
3345 | struct urb *urb, int slot_id, unsigned int ep_index) |
3346 | { | |
3347 | struct xhci_ring *ep_ring; | |
3348 | int num_trbs; | |
3349 | int ret; | |
3350 | struct usb_ctrlrequest *setup; | |
3351 | struct xhci_generic_trb *start_trb; | |
3352 | int start_cycle; | |
c840d6ce | 3353 | u32 field, length_field, remainder; |
8e51adcc | 3354 | struct urb_priv *urb_priv; |
d0e96f5a SS |
3355 | struct xhci_td *td; |
3356 | ||
e9df17eb SS |
3357 | ep_ring = xhci_urb_to_transfer_ring(xhci, urb); |
3358 | if (!ep_ring) | |
3359 | return -EINVAL; | |
d0e96f5a SS |
3360 | |
3361 | /* | |
3362 | * Need to copy setup packet into setup TRB, so we can't use the setup | |
3363 | * DMA address. | |
3364 | */ | |
3365 | if (!urb->setup_packet) | |
3366 | return -EINVAL; | |
3367 | ||
d0e96f5a SS |
3368 | /* 1 TRB for setup, 1 for status */ |
3369 | num_trbs = 2; | |
3370 | /* | |
3371 | * Don't need to check if we need additional event data and normal TRBs, | |
3372 | * since data in control transfers will never get bigger than 16MB | |
3373 | * XXX: can we get a buffer that crosses 64KB boundaries? | |
3374 | */ | |
3375 | if (urb->transfer_buffer_length > 0) | |
3376 | num_trbs++; | |
e9df17eb SS |
3377 | ret = prepare_transfer(xhci, xhci->devs[slot_id], |
3378 | ep_index, urb->stream_id, | |
3b72fca0 | 3379 | num_trbs, urb, 0, mem_flags); |
d0e96f5a SS |
3380 | if (ret < 0) |
3381 | return ret; | |
3382 | ||
8e51adcc AX |
3383 | urb_priv = urb->hcpriv; |
3384 | td = urb_priv->td[0]; | |
3385 | ||
d0e96f5a SS |
3386 | /* |
3387 | * Don't give the first TRB to the hardware (by toggling the cycle bit) | |
3388 | * until we've finished creating all the other TRBs. The ring's cycle | |
3389 | * state may change as we enqueue the other TRBs, so save it too. | |
3390 | */ | |
3391 | start_trb = &ep_ring->enqueue->generic; | |
3392 | start_cycle = ep_ring->cycle_state; | |
3393 | ||
3394 | /* Queue setup TRB - see section 6.4.1.2.1 */ | |
3395 | /* FIXME better way to translate setup_packet into two u32 fields? */ | |
3396 | setup = (struct usb_ctrlrequest *) urb->setup_packet; | |
50f7b52a AX |
3397 | field = 0; |
3398 | field |= TRB_IDT | TRB_TYPE(TRB_SETUP); | |
3399 | if (start_cycle == 0) | |
3400 | field |= 0x1; | |
b83cdc8f | 3401 | |
dca77945 | 3402 | /* xHCI 1.0/1.1 6.4.1.2.1: Transfer Type field */ |
0cbd4b34 | 3403 | if ((xhci->hci_version >= 0x100) || (xhci->quirks & XHCI_MTK_HOST)) { |
b83cdc8f AX |
3404 | if (urb->transfer_buffer_length > 0) { |
3405 | if (setup->bRequestType & USB_DIR_IN) | |
3406 | field |= TRB_TX_TYPE(TRB_DATA_IN); | |
3407 | else | |
3408 | field |= TRB_TX_TYPE(TRB_DATA_OUT); | |
3409 | } | |
3410 | } | |
3411 | ||
3b72fca0 | 3412 | queue_trb(xhci, ep_ring, true, |
28ccd296 ME |
3413 | setup->bRequestType | setup->bRequest << 8 | le16_to_cpu(setup->wValue) << 16, |
3414 | le16_to_cpu(setup->wIndex) | le16_to_cpu(setup->wLength) << 16, | |
3415 | TRB_LEN(8) | TRB_INTR_TARGET(0), | |
3416 | /* Immediate data in pointer */ | |
3417 | field); | |
d0e96f5a SS |
3418 | |
3419 | /* If there's data, queue data TRBs */ | |
af8b9e63 SS |
3420 | /* Only set interrupt on short packet for IN endpoints */ |
3421 | if (usb_urb_dir_in(urb)) | |
3422 | field = TRB_ISP | TRB_TYPE(TRB_DATA); | |
3423 | else | |
3424 | field = TRB_TYPE(TRB_DATA); | |
3425 | ||
c840d6ce MN |
3426 | remainder = xhci_td_remainder(xhci, 0, |
3427 | urb->transfer_buffer_length, | |
3428 | urb->transfer_buffer_length, | |
3429 | urb, 1); | |
3430 | ||
f9dc68fe | 3431 | length_field = TRB_LEN(urb->transfer_buffer_length) | |
c840d6ce | 3432 | TRB_TD_SIZE(remainder) | |
f9dc68fe | 3433 | TRB_INTR_TARGET(0); |
c840d6ce | 3434 | |
d0e96f5a SS |
3435 | if (urb->transfer_buffer_length > 0) { |
3436 | if (setup->bRequestType & USB_DIR_IN) | |
3437 | field |= TRB_DIR_IN; | |
3b72fca0 | 3438 | queue_trb(xhci, ep_ring, true, |
d0e96f5a SS |
3439 | lower_32_bits(urb->transfer_dma), |
3440 | upper_32_bits(urb->transfer_dma), | |
f9dc68fe | 3441 | length_field, |
af8b9e63 | 3442 | field | ep_ring->cycle_state); |
d0e96f5a SS |
3443 | } |
3444 | ||
3445 | /* Save the DMA address of the last TRB in the TD */ | |
3446 | td->last_trb = ep_ring->enqueue; | |
3447 | ||
3448 | /* Queue status TRB - see Table 7 and sections 4.11.2.2 and 6.4.1.2.3 */ | |
3449 | /* If the device sent data, the status stage is an OUT transfer */ | |
3450 | if (urb->transfer_buffer_length > 0 && setup->bRequestType & USB_DIR_IN) | |
3451 | field = 0; | |
3452 | else | |
3453 | field = TRB_DIR_IN; | |
3b72fca0 | 3454 | queue_trb(xhci, ep_ring, false, |
d0e96f5a SS |
3455 | 0, |
3456 | 0, | |
3457 | TRB_INTR_TARGET(0), | |
3458 | /* Event on completion */ | |
3459 | field | TRB_IOC | TRB_TYPE(TRB_STATUS) | ep_ring->cycle_state); | |
3460 | ||
e9df17eb | 3461 | giveback_first_trb(xhci, slot_id, ep_index, 0, |
e1eab2e0 | 3462 | start_cycle, start_trb); |
d0e96f5a SS |
3463 | return 0; |
3464 | } | |
3465 | ||
5cd43e33 SS |
3466 | /* |
3467 | * The transfer burst count field of the isochronous TRB defines the number of | |
3468 | * bursts that are required to move all packets in this TD. Only SuperSpeed | |
3469 | * devices can burst up to bMaxBurst number of packets per service interval. | |
3470 | * This field is zero based, meaning a value of zero in the field means one | |
3471 | * burst. Basically, for everything but SuperSpeed devices, this field will be | |
3472 | * zero. Only xHCI 1.0 host controllers support this field. | |
3473 | */ | |
3474 | static unsigned int xhci_get_burst_count(struct xhci_hcd *xhci, | |
5cd43e33 SS |
3475 | struct urb *urb, unsigned int total_packet_count) |
3476 | { | |
3477 | unsigned int max_burst; | |
3478 | ||
09c352ed | 3479 | if (xhci->hci_version < 0x100 || urb->dev->speed < USB_SPEED_SUPER) |
5cd43e33 SS |
3480 | return 0; |
3481 | ||
3482 | max_burst = urb->ep->ss_ep_comp.bMaxBurst; | |
3213b151 | 3483 | return DIV_ROUND_UP(total_packet_count, max_burst + 1) - 1; |
5cd43e33 SS |
3484 | } |
3485 | ||
b61d378f SS |
3486 | /* |
3487 | * Returns the number of packets in the last "burst" of packets. This field is | |
3488 | * valid for all speeds of devices. USB 2.0 devices can only do one "burst", so | |
3489 | * the last burst packet count is equal to the total number of packets in the | |
3490 | * TD. SuperSpeed endpoints can have up to 3 bursts. All but the last burst | |
3491 | * must contain (bMaxBurst + 1) number of packets, but the last burst can | |
3492 | * contain 1 to (bMaxBurst + 1) packets. | |
3493 | */ | |
3494 | static unsigned int xhci_get_last_burst_packet_count(struct xhci_hcd *xhci, | |
b61d378f SS |
3495 | struct urb *urb, unsigned int total_packet_count) |
3496 | { | |
3497 | unsigned int max_burst; | |
3498 | unsigned int residue; | |
3499 | ||
3500 | if (xhci->hci_version < 0x100) | |
3501 | return 0; | |
3502 | ||
09c352ed | 3503 | if (urb->dev->speed >= USB_SPEED_SUPER) { |
b61d378f SS |
3504 | /* bMaxBurst is zero based: 0 means 1 packet per burst */ |
3505 | max_burst = urb->ep->ss_ep_comp.bMaxBurst; | |
3506 | residue = total_packet_count % (max_burst + 1); | |
3507 | /* If residue is zero, the last burst contains (max_burst + 1) | |
3508 | * number of packets, but the TLBPC field is zero-based. | |
3509 | */ | |
3510 | if (residue == 0) | |
3511 | return max_burst; | |
3512 | return residue - 1; | |
b61d378f | 3513 | } |
09c352ed MN |
3514 | if (total_packet_count == 0) |
3515 | return 0; | |
3516 | return total_packet_count - 1; | |
b61d378f SS |
3517 | } |
3518 | ||
79b8094f LB |
3519 | /* |
3520 | * Calculates Frame ID field of the isochronous TRB identifies the | |
3521 | * target frame that the Interval associated with this Isochronous | |
3522 | * Transfer Descriptor will start on. Refer to 4.11.2.5 in 1.1 spec. | |
3523 | * | |
3524 | * Returns actual frame id on success, negative value on error. | |
3525 | */ | |
3526 | static int xhci_get_isoc_frame_id(struct xhci_hcd *xhci, | |
3527 | struct urb *urb, int index) | |
3528 | { | |
3529 | int start_frame, ist, ret = 0; | |
3530 | int start_frame_id, end_frame_id, current_frame_id; | |
3531 | ||
3532 | if (urb->dev->speed == USB_SPEED_LOW || | |
3533 | urb->dev->speed == USB_SPEED_FULL) | |
3534 | start_frame = urb->start_frame + index * urb->interval; | |
3535 | else | |
3536 | start_frame = (urb->start_frame + index * urb->interval) >> 3; | |
3537 | ||
3538 | /* Isochronous Scheduling Threshold (IST, bits 0~3 in HCSPARAMS2): | |
3539 | * | |
3540 | * If bit [3] of IST is cleared to '0', software can add a TRB no | |
3541 | * later than IST[2:0] Microframes before that TRB is scheduled to | |
3542 | * be executed. | |
3543 | * If bit [3] of IST is set to '1', software can add a TRB no later | |
3544 | * than IST[2:0] Frames before that TRB is scheduled to be executed. | |
3545 | */ | |
3546 | ist = HCS_IST(xhci->hcs_params2) & 0x7; | |
3547 | if (HCS_IST(xhci->hcs_params2) & (1 << 3)) | |
3548 | ist <<= 3; | |
3549 | ||
3550 | /* Software shall not schedule an Isoch TD with a Frame ID value that | |
3551 | * is less than the Start Frame ID or greater than the End Frame ID, | |
3552 | * where: | |
3553 | * | |
3554 | * End Frame ID = (Current MFINDEX register value + 895 ms.) MOD 2048 | |
3555 | * Start Frame ID = (Current MFINDEX register value + IST + 1) MOD 2048 | |
3556 | * | |
3557 | * Both the End Frame ID and Start Frame ID values are calculated | |
3558 | * in microframes. When software determines the valid Frame ID value; | |
3559 | * The End Frame ID value should be rounded down to the nearest Frame | |
3560 | * boundary, and the Start Frame ID value should be rounded up to the | |
3561 | * nearest Frame boundary. | |
3562 | */ | |
3563 | current_frame_id = readl(&xhci->run_regs->microframe_index); | |
3564 | start_frame_id = roundup(current_frame_id + ist + 1, 8); | |
3565 | end_frame_id = rounddown(current_frame_id + 895 * 8, 8); | |
3566 | ||
3567 | start_frame &= 0x7ff; | |
3568 | start_frame_id = (start_frame_id >> 3) & 0x7ff; | |
3569 | end_frame_id = (end_frame_id >> 3) & 0x7ff; | |
3570 | ||
3571 | xhci_dbg(xhci, "%s: index %d, reg 0x%x start_frame_id 0x%x, end_frame_id 0x%x, start_frame 0x%x\n", | |
3572 | __func__, index, readl(&xhci->run_regs->microframe_index), | |
3573 | start_frame_id, end_frame_id, start_frame); | |
3574 | ||
3575 | if (start_frame_id < end_frame_id) { | |
3576 | if (start_frame > end_frame_id || | |
3577 | start_frame < start_frame_id) | |
3578 | ret = -EINVAL; | |
3579 | } else if (start_frame_id > end_frame_id) { | |
3580 | if ((start_frame > end_frame_id && | |
3581 | start_frame < start_frame_id)) | |
3582 | ret = -EINVAL; | |
3583 | } else { | |
3584 | ret = -EINVAL; | |
3585 | } | |
3586 | ||
3587 | if (index == 0) { | |
3588 | if (ret == -EINVAL || start_frame == start_frame_id) { | |
3589 | start_frame = start_frame_id + 1; | |
3590 | if (urb->dev->speed == USB_SPEED_LOW || | |
3591 | urb->dev->speed == USB_SPEED_FULL) | |
3592 | urb->start_frame = start_frame; | |
3593 | else | |
3594 | urb->start_frame = start_frame << 3; | |
3595 | ret = 0; | |
3596 | } | |
3597 | } | |
3598 | ||
3599 | if (ret) { | |
3600 | xhci_warn(xhci, "Frame ID %d (reg %d, index %d) beyond range (%d, %d)\n", | |
3601 | start_frame, current_frame_id, index, | |
3602 | start_frame_id, end_frame_id); | |
3603 | xhci_warn(xhci, "Ignore frame ID field, use SIA bit instead\n"); | |
3604 | return ret; | |
3605 | } | |
3606 | ||
3607 | return start_frame; | |
3608 | } | |
3609 | ||
04e51901 AX |
3610 | /* This is for isoc transfer */ |
3611 | static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags, | |
3612 | struct urb *urb, int slot_id, unsigned int ep_index) | |
3613 | { | |
3614 | struct xhci_ring *ep_ring; | |
3615 | struct urb_priv *urb_priv; | |
3616 | struct xhci_td *td; | |
3617 | int num_tds, trbs_per_td; | |
3618 | struct xhci_generic_trb *start_trb; | |
3619 | bool first_trb; | |
3620 | int start_cycle; | |
3621 | u32 field, length_field; | |
3622 | int running_total, trb_buff_len, td_len, td_remain_len, ret; | |
3623 | u64 start_addr, addr; | |
3624 | int i, j; | |
47cbf692 | 3625 | bool more_trbs_coming; |
79b8094f | 3626 | struct xhci_virt_ep *xep; |
09c352ed | 3627 | int frame_id; |
04e51901 | 3628 | |
79b8094f | 3629 | xep = &xhci->devs[slot_id]->eps[ep_index]; |
04e51901 AX |
3630 | ep_ring = xhci->devs[slot_id]->eps[ep_index].ring; |
3631 | ||
3632 | num_tds = urb->number_of_packets; | |
3633 | if (num_tds < 1) { | |
3634 | xhci_dbg(xhci, "Isoc URB with zero packets?\n"); | |
3635 | return -EINVAL; | |
3636 | } | |
04e51901 AX |
3637 | start_addr = (u64) urb->transfer_dma; |
3638 | start_trb = &ep_ring->enqueue->generic; | |
3639 | start_cycle = ep_ring->cycle_state; | |
3640 | ||
522989a2 | 3641 | urb_priv = urb->hcpriv; |
09c352ed | 3642 | /* Queue the TRBs for each TD, even if they are zero-length */ |
04e51901 | 3643 | for (i = 0; i < num_tds; i++) { |
09c352ed MN |
3644 | unsigned int total_pkt_count, max_pkt; |
3645 | unsigned int burst_count, last_burst_pkt_count; | |
3646 | u32 sia_frame_id; | |
04e51901 | 3647 | |
4da6e6f2 | 3648 | first_trb = true; |
04e51901 AX |
3649 | running_total = 0; |
3650 | addr = start_addr + urb->iso_frame_desc[i].offset; | |
3651 | td_len = urb->iso_frame_desc[i].length; | |
3652 | td_remain_len = td_len; | |
09c352ed MN |
3653 | max_pkt = GET_MAX_PACKET(usb_endpoint_maxp(&urb->ep->desc)); |
3654 | total_pkt_count = DIV_ROUND_UP(td_len, max_pkt); | |
3655 | ||
48df4a6f | 3656 | /* A zero-length transfer still involves at least one packet. */ |
09c352ed MN |
3657 | if (total_pkt_count == 0) |
3658 | total_pkt_count++; | |
3659 | burst_count = xhci_get_burst_count(xhci, urb, total_pkt_count); | |
3660 | last_burst_pkt_count = xhci_get_last_burst_packet_count(xhci, | |
3661 | urb, total_pkt_count); | |
04e51901 | 3662 | |
d2510342 | 3663 | trbs_per_td = count_isoc_trbs_needed(urb, i); |
04e51901 AX |
3664 | |
3665 | ret = prepare_transfer(xhci, xhci->devs[slot_id], ep_index, | |
3b72fca0 | 3666 | urb->stream_id, trbs_per_td, urb, i, mem_flags); |
522989a2 SS |
3667 | if (ret < 0) { |
3668 | if (i == 0) | |
3669 | return ret; | |
3670 | goto cleanup; | |
3671 | } | |
04e51901 | 3672 | td = urb_priv->td[i]; |
09c352ed MN |
3673 | |
3674 | /* use SIA as default, if frame id is used overwrite it */ | |
3675 | sia_frame_id = TRB_SIA; | |
3676 | if (!(urb->transfer_flags & URB_ISO_ASAP) && | |
3677 | HCC_CFC(xhci->hcc_params)) { | |
3678 | frame_id = xhci_get_isoc_frame_id(xhci, urb, i); | |
3679 | if (frame_id >= 0) | |
3680 | sia_frame_id = TRB_FRAME_ID(frame_id); | |
3681 | } | |
3682 | /* | |
3683 | * Set isoc specific data for the first TRB in a TD. | |
3684 | * Prevent HW from getting the TRBs by keeping the cycle state | |
3685 | * inverted in the first TDs isoc TRB. | |
3686 | */ | |
2f6d3b65 | 3687 | field = TRB_TYPE(TRB_ISOC) | |
09c352ed MN |
3688 | TRB_TLBPC(last_burst_pkt_count) | |
3689 | sia_frame_id | | |
3690 | (i ? ep_ring->cycle_state : !start_cycle); | |
3691 | ||
2f6d3b65 MN |
3692 | /* xhci 1.1 with ETE uses TD_Size field for TBC, old is Rsvdz */ |
3693 | if (!xep->use_extended_tbc) | |
3694 | field |= TRB_TBC(burst_count); | |
3695 | ||
09c352ed | 3696 | /* fill the rest of the TRB fields, and remaining normal TRBs */ |
04e51901 AX |
3697 | for (j = 0; j < trbs_per_td; j++) { |
3698 | u32 remainder = 0; | |
09c352ed MN |
3699 | |
3700 | /* only first TRB is isoc, overwrite otherwise */ | |
3701 | if (!first_trb) | |
3702 | field = TRB_TYPE(TRB_NORMAL) | | |
3703 | ep_ring->cycle_state; | |
04e51901 | 3704 | |
af8b9e63 SS |
3705 | /* Only set interrupt on short packet for IN EPs */ |
3706 | if (usb_urb_dir_in(urb)) | |
3707 | field |= TRB_ISP; | |
3708 | ||
09c352ed | 3709 | /* Set the chain bit for all except the last TRB */ |
04e51901 | 3710 | if (j < trbs_per_td - 1) { |
47cbf692 | 3711 | more_trbs_coming = true; |
09c352ed | 3712 | field |= TRB_CHAIN; |
04e51901 | 3713 | } else { |
09c352ed | 3714 | more_trbs_coming = false; |
04e51901 AX |
3715 | td->last_trb = ep_ring->enqueue; |
3716 | field |= TRB_IOC; | |
09c352ed MN |
3717 | /* set BEI, except for the last TD */ |
3718 | if (xhci->hci_version >= 0x100 && | |
3719 | !(xhci->quirks & XHCI_AVOID_BEI) && | |
3720 | i < num_tds - 1) | |
3721 | field |= TRB_BEI; | |
04e51901 | 3722 | } |
04e51901 | 3723 | /* Calculate TRB length */ |
d2510342 | 3724 | trb_buff_len = TRB_BUFF_LEN_UP_TO_BOUNDARY(addr); |
04e51901 AX |
3725 | if (trb_buff_len > td_remain_len) |
3726 | trb_buff_len = td_remain_len; | |
3727 | ||
4da6e6f2 | 3728 | /* Set the TRB length, TD size, & interrupter fields. */ |
c840d6ce MN |
3729 | remainder = xhci_td_remainder(xhci, running_total, |
3730 | trb_buff_len, td_len, | |
124c3937 | 3731 | urb, more_trbs_coming); |
c840d6ce | 3732 | |
04e51901 | 3733 | length_field = TRB_LEN(trb_buff_len) | |
04e51901 | 3734 | TRB_INTR_TARGET(0); |
4da6e6f2 | 3735 | |
2f6d3b65 MN |
3736 | /* xhci 1.1 with ETE uses TD Size field for TBC */ |
3737 | if (first_trb && xep->use_extended_tbc) | |
3738 | length_field |= TRB_TD_SIZE_TBC(burst_count); | |
3739 | else | |
3740 | length_field |= TRB_TD_SIZE(remainder); | |
3741 | first_trb = false; | |
3742 | ||
3b72fca0 | 3743 | queue_trb(xhci, ep_ring, more_trbs_coming, |
04e51901 AX |
3744 | lower_32_bits(addr), |
3745 | upper_32_bits(addr), | |
3746 | length_field, | |
af8b9e63 | 3747 | field); |
04e51901 AX |
3748 | running_total += trb_buff_len; |
3749 | ||
3750 | addr += trb_buff_len; | |
3751 | td_remain_len -= trb_buff_len; | |
3752 | } | |
3753 | ||
3754 | /* Check TD length */ | |
3755 | if (running_total != td_len) { | |
3756 | xhci_err(xhci, "ISOC TD length unmatch\n"); | |
cf840551 AX |
3757 | ret = -EINVAL; |
3758 | goto cleanup; | |
04e51901 AX |
3759 | } |
3760 | } | |
3761 | ||
79b8094f LB |
3762 | /* store the next frame id */ |
3763 | if (HCC_CFC(xhci->hcc_params)) | |
3764 | xep->next_frame_id = urb->start_frame + num_tds * urb->interval; | |
3765 | ||
c41136b0 AX |
3766 | if (xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs == 0) { |
3767 | if (xhci->quirks & XHCI_AMD_PLL_FIX) | |
3768 | usb_amd_quirk_pll_disable(); | |
3769 | } | |
3770 | xhci_to_hcd(xhci)->self.bandwidth_isoc_reqs++; | |
3771 | ||
e1eab2e0 AX |
3772 | giveback_first_trb(xhci, slot_id, ep_index, urb->stream_id, |
3773 | start_cycle, start_trb); | |
04e51901 | 3774 | return 0; |
522989a2 SS |
3775 | cleanup: |
3776 | /* Clean up a partially enqueued isoc transfer. */ | |
3777 | ||
3778 | for (i--; i >= 0; i--) | |
585df1d9 | 3779 | list_del_init(&urb_priv->td[i]->td_list); |
522989a2 SS |
3780 | |
3781 | /* Use the first TD as a temporary variable to turn the TDs we've queued | |
3782 | * into No-ops with a software-owned cycle bit. That way the hardware | |
3783 | * won't accidentally start executing bogus TDs when we partially | |
3784 | * overwrite them. td->first_trb and td->start_seg are already set. | |
3785 | */ | |
3786 | urb_priv->td[0]->last_trb = ep_ring->enqueue; | |
3787 | /* Every TRB except the first & last will have its cycle bit flipped. */ | |
3788 | td_to_noop(xhci, ep_ring, urb_priv->td[0], true); | |
3789 | ||
3790 | /* Reset the ring enqueue back to the first TRB and its cycle bit. */ | |
3791 | ep_ring->enqueue = urb_priv->td[0]->first_trb; | |
3792 | ep_ring->enq_seg = urb_priv->td[0]->start_seg; | |
3793 | ep_ring->cycle_state = start_cycle; | |
b008df60 | 3794 | ep_ring->num_trbs_free = ep_ring->num_trbs_free_temp; |
522989a2 SS |
3795 | usb_hcd_unlink_urb_from_ep(bus_to_hcd(urb->dev->bus), urb); |
3796 | return ret; | |
04e51901 AX |
3797 | } |
3798 | ||
3799 | /* | |
3800 | * Check transfer ring to guarantee there is enough room for the urb. | |
3801 | * Update ISO URB start_frame and interval. | |
79b8094f LB |
3802 | * Update interval as xhci_queue_intr_tx does. Use xhci frame_index to |
3803 | * update urb->start_frame if URB_ISO_ASAP is set in transfer_flags or | |
3804 | * Contiguous Frame ID is not supported by HC. | |
04e51901 AX |
3805 | */ |
3806 | int xhci_queue_isoc_tx_prepare(struct xhci_hcd *xhci, gfp_t mem_flags, | |
3807 | struct urb *urb, int slot_id, unsigned int ep_index) | |
3808 | { | |
3809 | struct xhci_virt_device *xdev; | |
3810 | struct xhci_ring *ep_ring; | |
3811 | struct xhci_ep_ctx *ep_ctx; | |
3812 | int start_frame; | |
04e51901 AX |
3813 | int num_tds, num_trbs, i; |
3814 | int ret; | |
79b8094f LB |
3815 | struct xhci_virt_ep *xep; |
3816 | int ist; | |
04e51901 AX |
3817 | |
3818 | xdev = xhci->devs[slot_id]; | |
79b8094f | 3819 | xep = &xhci->devs[slot_id]->eps[ep_index]; |
04e51901 AX |
3820 | ep_ring = xdev->eps[ep_index].ring; |
3821 | ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index); | |
3822 | ||
3823 | num_trbs = 0; | |
3824 | num_tds = urb->number_of_packets; | |
3825 | for (i = 0; i < num_tds; i++) | |
d2510342 | 3826 | num_trbs += count_isoc_trbs_needed(urb, i); |
04e51901 AX |
3827 | |
3828 | /* Check the ring to guarantee there is enough room for the whole urb. | |
3829 | * Do not insert any td of the urb to the ring if the check failed. | |
3830 | */ | |
28ccd296 | 3831 | ret = prepare_ring(xhci, ep_ring, le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK, |
3b72fca0 | 3832 | num_trbs, mem_flags); |
04e51901 AX |
3833 | if (ret) |
3834 | return ret; | |
3835 | ||
79b8094f LB |
3836 | /* |
3837 | * Check interval value. This should be done before we start to | |
3838 | * calculate the start frame value. | |
3839 | */ | |
78140156 | 3840 | check_interval(xhci, urb, ep_ctx); |
79b8094f LB |
3841 | |
3842 | /* Calculate the start frame and put it in urb->start_frame. */ | |
42df7215 LB |
3843 | if (HCC_CFC(xhci->hcc_params) && !list_empty(&ep_ring->td_list)) { |
3844 | if ((le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK) == | |
3845 | EP_STATE_RUNNING) { | |
3846 | urb->start_frame = xep->next_frame_id; | |
3847 | goto skip_start_over; | |
3848 | } | |
79b8094f LB |
3849 | } |
3850 | ||
3851 | start_frame = readl(&xhci->run_regs->microframe_index); | |
3852 | start_frame &= 0x3fff; | |
3853 | /* | |
3854 | * Round up to the next frame and consider the time before trb really | |
3855 | * gets scheduled by hardare. | |
3856 | */ | |
3857 | ist = HCS_IST(xhci->hcs_params2) & 0x7; | |
3858 | if (HCS_IST(xhci->hcs_params2) & (1 << 3)) | |
3859 | ist <<= 3; | |
3860 | start_frame += ist + XHCI_CFC_DELAY; | |
3861 | start_frame = roundup(start_frame, 8); | |
3862 | ||
3863 | /* | |
3864 | * Round up to the next ESIT (Endpoint Service Interval Time) if ESIT | |
3865 | * is greate than 8 microframes. | |
3866 | */ | |
3867 | if (urb->dev->speed == USB_SPEED_LOW || | |
3868 | urb->dev->speed == USB_SPEED_FULL) { | |
3869 | start_frame = roundup(start_frame, urb->interval << 3); | |
3870 | urb->start_frame = start_frame >> 3; | |
3871 | } else { | |
3872 | start_frame = roundup(start_frame, urb->interval); | |
3873 | urb->start_frame = start_frame; | |
3874 | } | |
3875 | ||
3876 | skip_start_over: | |
b008df60 AX |
3877 | ep_ring->num_trbs_free_temp = ep_ring->num_trbs_free; |
3878 | ||
3fc8206d | 3879 | return xhci_queue_isoc_tx(xhci, mem_flags, urb, slot_id, ep_index); |
04e51901 AX |
3880 | } |
3881 | ||
d0e96f5a SS |
3882 | /**** Command Ring Operations ****/ |
3883 | ||
913a8a34 SS |
3884 | /* Generic function for queueing a command TRB on the command ring. |
3885 | * Check to make sure there's room on the command ring for one command TRB. | |
3886 | * Also check that there's room reserved for commands that must not fail. | |
3887 | * If this is a command that must not fail, meaning command_must_succeed = TRUE, | |
3888 | * then only check for the number of reserved spots. | |
3889 | * Don't decrement xhci->cmd_ring_reserved_trbs after we've queued the TRB | |
3890 | * because the command event handler may want to resubmit a failed command. | |
3891 | */ | |
ddba5cd0 MN |
3892 | static int queue_command(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3893 | u32 field1, u32 field2, | |
3894 | u32 field3, u32 field4, bool command_must_succeed) | |
7f84eef0 | 3895 | { |
913a8a34 | 3896 | int reserved_trbs = xhci->cmd_ring_reserved_trbs; |
d1dc908a | 3897 | int ret; |
ad6b1d91 | 3898 | |
98d74f9c MN |
3899 | if ((xhci->xhc_state & XHCI_STATE_DYING) || |
3900 | (xhci->xhc_state & XHCI_STATE_HALTED)) { | |
ad6b1d91 | 3901 | xhci_dbg(xhci, "xHCI dying or halted, can't queue_command\n"); |
c9aa1a2d | 3902 | return -ESHUTDOWN; |
ad6b1d91 | 3903 | } |
d1dc908a | 3904 | |
913a8a34 SS |
3905 | if (!command_must_succeed) |
3906 | reserved_trbs++; | |
3907 | ||
d1dc908a | 3908 | ret = prepare_ring(xhci, xhci->cmd_ring, EP_STATE_RUNNING, |
3b72fca0 | 3909 | reserved_trbs, GFP_ATOMIC); |
d1dc908a SS |
3910 | if (ret < 0) { |
3911 | xhci_err(xhci, "ERR: No room for command on command ring\n"); | |
913a8a34 SS |
3912 | if (command_must_succeed) |
3913 | xhci_err(xhci, "ERR: Reserved TRB counting for " | |
3914 | "unfailable commands failed.\n"); | |
d1dc908a | 3915 | return ret; |
7f84eef0 | 3916 | } |
c9aa1a2d MN |
3917 | |
3918 | cmd->command_trb = xhci->cmd_ring->enqueue; | |
3919 | list_add_tail(&cmd->cmd_list, &xhci->cmd_list); | |
ddba5cd0 | 3920 | |
c311e391 MN |
3921 | /* if there are no other commands queued we start the timeout timer */ |
3922 | if (xhci->cmd_list.next == &cmd->cmd_list && | |
3923 | !timer_pending(&xhci->cmd_timer)) { | |
3924 | xhci->current_cmd = cmd; | |
3925 | mod_timer(&xhci->cmd_timer, jiffies + XHCI_CMD_DEFAULT_TIMEOUT); | |
3926 | } | |
3927 | ||
3b72fca0 AX |
3928 | queue_trb(xhci, xhci->cmd_ring, false, field1, field2, field3, |
3929 | field4 | xhci->cmd_ring->cycle_state); | |
7f84eef0 SS |
3930 | return 0; |
3931 | } | |
3932 | ||
3ffbba95 | 3933 | /* Queue a slot enable or disable request on the command ring */ |
ddba5cd0 MN |
3934 | int xhci_queue_slot_control(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3935 | u32 trb_type, u32 slot_id) | |
3ffbba95 | 3936 | { |
ddba5cd0 | 3937 | return queue_command(xhci, cmd, 0, 0, 0, |
913a8a34 | 3938 | TRB_TYPE(trb_type) | SLOT_ID_FOR_TRB(slot_id), false); |
3ffbba95 SS |
3939 | } |
3940 | ||
3941 | /* Queue an address device command TRB */ | |
ddba5cd0 MN |
3942 | int xhci_queue_address_device(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3943 | dma_addr_t in_ctx_ptr, u32 slot_id, enum xhci_setup_dev setup) | |
3ffbba95 | 3944 | { |
ddba5cd0 | 3945 | return queue_command(xhci, cmd, lower_32_bits(in_ctx_ptr), |
8e595a5d | 3946 | upper_32_bits(in_ctx_ptr), 0, |
48fc7dbd DW |
3947 | TRB_TYPE(TRB_ADDR_DEV) | SLOT_ID_FOR_TRB(slot_id) |
3948 | | (setup == SETUP_CONTEXT_ONLY ? TRB_BSR : 0), false); | |
2a8f82c4 SS |
3949 | } |
3950 | ||
ddba5cd0 | 3951 | int xhci_queue_vendor_command(struct xhci_hcd *xhci, struct xhci_command *cmd, |
0238634d SS |
3952 | u32 field1, u32 field2, u32 field3, u32 field4) |
3953 | { | |
ddba5cd0 | 3954 | return queue_command(xhci, cmd, field1, field2, field3, field4, false); |
0238634d SS |
3955 | } |
3956 | ||
2a8f82c4 | 3957 | /* Queue a reset device command TRB */ |
ddba5cd0 MN |
3958 | int xhci_queue_reset_device(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3959 | u32 slot_id) | |
2a8f82c4 | 3960 | { |
ddba5cd0 | 3961 | return queue_command(xhci, cmd, 0, 0, 0, |
2a8f82c4 | 3962 | TRB_TYPE(TRB_RESET_DEV) | SLOT_ID_FOR_TRB(slot_id), |
913a8a34 | 3963 | false); |
3ffbba95 | 3964 | } |
f94e0186 SS |
3965 | |
3966 | /* Queue a configure endpoint command TRB */ | |
ddba5cd0 MN |
3967 | int xhci_queue_configure_endpoint(struct xhci_hcd *xhci, |
3968 | struct xhci_command *cmd, dma_addr_t in_ctx_ptr, | |
913a8a34 | 3969 | u32 slot_id, bool command_must_succeed) |
f94e0186 | 3970 | { |
ddba5cd0 | 3971 | return queue_command(xhci, cmd, lower_32_bits(in_ctx_ptr), |
8e595a5d | 3972 | upper_32_bits(in_ctx_ptr), 0, |
913a8a34 SS |
3973 | TRB_TYPE(TRB_CONFIG_EP) | SLOT_ID_FOR_TRB(slot_id), |
3974 | command_must_succeed); | |
f94e0186 | 3975 | } |
ae636747 | 3976 | |
f2217e8e | 3977 | /* Queue an evaluate context command TRB */ |
ddba5cd0 MN |
3978 | int xhci_queue_evaluate_context(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3979 | dma_addr_t in_ctx_ptr, u32 slot_id, bool command_must_succeed) | |
f2217e8e | 3980 | { |
ddba5cd0 | 3981 | return queue_command(xhci, cmd, lower_32_bits(in_ctx_ptr), |
f2217e8e | 3982 | upper_32_bits(in_ctx_ptr), 0, |
913a8a34 | 3983 | TRB_TYPE(TRB_EVAL_CONTEXT) | SLOT_ID_FOR_TRB(slot_id), |
4b266541 | 3984 | command_must_succeed); |
f2217e8e SS |
3985 | } |
3986 | ||
be88fe4f AX |
3987 | /* |
3988 | * Suspend is set to indicate "Stop Endpoint Command" is being issued to stop | |
3989 | * activity on an endpoint that is about to be suspended. | |
3990 | */ | |
ddba5cd0 MN |
3991 | int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, struct xhci_command *cmd, |
3992 | int slot_id, unsigned int ep_index, int suspend) | |
ae636747 SS |
3993 | { |
3994 | u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id); | |
3995 | u32 trb_ep_index = EP_ID_FOR_TRB(ep_index); | |
3996 | u32 type = TRB_TYPE(TRB_STOP_RING); | |
be88fe4f | 3997 | u32 trb_suspend = SUSPEND_PORT_FOR_TRB(suspend); |
ae636747 | 3998 | |
ddba5cd0 | 3999 | return queue_command(xhci, cmd, 0, 0, 0, |
be88fe4f | 4000 | trb_slot_id | trb_ep_index | type | trb_suspend, false); |
ae636747 SS |
4001 | } |
4002 | ||
d3a43e66 HG |
4003 | /* Set Transfer Ring Dequeue Pointer command */ |
4004 | void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci, | |
4005 | unsigned int slot_id, unsigned int ep_index, | |
4006 | unsigned int stream_id, | |
4007 | struct xhci_dequeue_state *deq_state) | |
ae636747 SS |
4008 | { |
4009 | dma_addr_t addr; | |
4010 | u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id); | |
4011 | u32 trb_ep_index = EP_ID_FOR_TRB(ep_index); | |
e9df17eb | 4012 | u32 trb_stream_id = STREAM_ID_FOR_TRB(stream_id); |
95241dbd | 4013 | u32 trb_sct = 0; |
ae636747 | 4014 | u32 type = TRB_TYPE(TRB_SET_DEQ); |
bf161e85 | 4015 | struct xhci_virt_ep *ep; |
1e3452e3 HG |
4016 | struct xhci_command *cmd; |
4017 | int ret; | |
ae636747 | 4018 | |
d3a43e66 HG |
4019 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
4020 | "Set TR Deq Ptr cmd, new deq seg = %p (0x%llx dma), new deq ptr = %p (0x%llx dma), new cycle = %u", | |
4021 | deq_state->new_deq_seg, | |
4022 | (unsigned long long)deq_state->new_deq_seg->dma, | |
4023 | deq_state->new_deq_ptr, | |
4024 | (unsigned long long)xhci_trb_virt_to_dma( | |
4025 | deq_state->new_deq_seg, deq_state->new_deq_ptr), | |
4026 | deq_state->new_cycle_state); | |
4027 | ||
4028 | addr = xhci_trb_virt_to_dma(deq_state->new_deq_seg, | |
4029 | deq_state->new_deq_ptr); | |
c92bcfa7 | 4030 | if (addr == 0) { |
ae636747 | 4031 | xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n"); |
700e2052 | 4032 | xhci_warn(xhci, "WARN deq seg = %p, deq pt = %p\n", |
d3a43e66 HG |
4033 | deq_state->new_deq_seg, deq_state->new_deq_ptr); |
4034 | return; | |
c92bcfa7 | 4035 | } |
bf161e85 SS |
4036 | ep = &xhci->devs[slot_id]->eps[ep_index]; |
4037 | if ((ep->ep_state & SET_DEQ_PENDING)) { | |
4038 | xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n"); | |
4039 | xhci_warn(xhci, "A Set TR Deq Ptr command is pending.\n"); | |
d3a43e66 | 4040 | return; |
bf161e85 | 4041 | } |
1e3452e3 HG |
4042 | |
4043 | /* This function gets called from contexts where it cannot sleep */ | |
4044 | cmd = xhci_alloc_command(xhci, false, false, GFP_ATOMIC); | |
4045 | if (!cmd) { | |
4046 | xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr: ENOMEM\n"); | |
d3a43e66 | 4047 | return; |
1e3452e3 HG |
4048 | } |
4049 | ||
d3a43e66 HG |
4050 | ep->queued_deq_seg = deq_state->new_deq_seg; |
4051 | ep->queued_deq_ptr = deq_state->new_deq_ptr; | |
95241dbd HG |
4052 | if (stream_id) |
4053 | trb_sct = SCT_FOR_TRB(SCT_PRI_TR); | |
1e3452e3 | 4054 | ret = queue_command(xhci, cmd, |
d3a43e66 HG |
4055 | lower_32_bits(addr) | trb_sct | deq_state->new_cycle_state, |
4056 | upper_32_bits(addr), trb_stream_id, | |
4057 | trb_slot_id | trb_ep_index | type, false); | |
1e3452e3 HG |
4058 | if (ret < 0) { |
4059 | xhci_free_command(xhci, cmd); | |
d3a43e66 | 4060 | return; |
1e3452e3 HG |
4061 | } |
4062 | ||
d3a43e66 HG |
4063 | /* Stop the TD queueing code from ringing the doorbell until |
4064 | * this command completes. The HC won't set the dequeue pointer | |
4065 | * if the ring is running, and ringing the doorbell starts the | |
4066 | * ring running. | |
4067 | */ | |
4068 | ep->ep_state |= SET_DEQ_PENDING; | |
ae636747 | 4069 | } |
a1587d97 | 4070 | |
ddba5cd0 MN |
4071 | int xhci_queue_reset_ep(struct xhci_hcd *xhci, struct xhci_command *cmd, |
4072 | int slot_id, unsigned int ep_index) | |
a1587d97 SS |
4073 | { |
4074 | u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id); | |
4075 | u32 trb_ep_index = EP_ID_FOR_TRB(ep_index); | |
4076 | u32 type = TRB_TYPE(TRB_RESET_EP); | |
4077 | ||
ddba5cd0 MN |
4078 | return queue_command(xhci, cmd, 0, 0, 0, |
4079 | trb_slot_id | trb_ep_index | type, false); | |
a1587d97 | 4080 | } |