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Commit | Line | Data |
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66d4eadd SS |
1 | /* |
2 | * xHCI host controller driver | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp. | |
5 | * | |
6 | * Author: Sarah Sharp | |
7 | * Some code borrowed from the Linux EHCI driver. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | * for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software Foundation, | |
20 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
43b86af8 | 23 | #include <linux/pci.h> |
66d4eadd | 24 | #include <linux/irq.h> |
8df75f42 | 25 | #include <linux/log2.h> |
66d4eadd | 26 | #include <linux/module.h> |
b0567b3f | 27 | #include <linux/moduleparam.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
66d4eadd SS |
29 | |
30 | #include "xhci.h" | |
31 | ||
32 | #define DRIVER_AUTHOR "Sarah Sharp" | |
33 | #define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver" | |
34 | ||
b0567b3f SS |
35 | /* Some 0.95 hardware can't handle the chain bit on a Link TRB being cleared */ |
36 | static int link_quirk; | |
37 | module_param(link_quirk, int, S_IRUGO | S_IWUSR); | |
38 | MODULE_PARM_DESC(link_quirk, "Don't clear the chain bit on a link TRB"); | |
39 | ||
66d4eadd SS |
40 | /* TODO: copied from ehci-hcd.c - can this be refactored? */ |
41 | /* | |
42 | * handshake - spin reading hc until handshake completes or fails | |
43 | * @ptr: address of hc register to be read | |
44 | * @mask: bits to look at in result of read | |
45 | * @done: value of those bits when handshake succeeds | |
46 | * @usec: timeout in microseconds | |
47 | * | |
48 | * Returns negative errno, or zero on success | |
49 | * | |
50 | * Success happens when the "mask" bits have the specified value (hardware | |
51 | * handshake done). There are two failure modes: "usec" have passed (major | |
52 | * hardware flakeout), or the register reads as all-ones (hardware removed). | |
53 | */ | |
54 | static int handshake(struct xhci_hcd *xhci, void __iomem *ptr, | |
55 | u32 mask, u32 done, int usec) | |
56 | { | |
57 | u32 result; | |
58 | ||
59 | do { | |
60 | result = xhci_readl(xhci, ptr); | |
61 | if (result == ~(u32)0) /* card removed */ | |
62 | return -ENODEV; | |
63 | result &= mask; | |
64 | if (result == done) | |
65 | return 0; | |
66 | udelay(1); | |
67 | usec--; | |
68 | } while (usec > 0); | |
69 | return -ETIMEDOUT; | |
70 | } | |
71 | ||
72 | /* | |
4f0f0bae | 73 | * Disable interrupts and begin the xHCI halting process. |
66d4eadd | 74 | */ |
4f0f0bae | 75 | void xhci_quiesce(struct xhci_hcd *xhci) |
66d4eadd SS |
76 | { |
77 | u32 halted; | |
78 | u32 cmd; | |
79 | u32 mask; | |
80 | ||
66d4eadd SS |
81 | mask = ~(XHCI_IRQS); |
82 | halted = xhci_readl(xhci, &xhci->op_regs->status) & STS_HALT; | |
83 | if (!halted) | |
84 | mask &= ~CMD_RUN; | |
85 | ||
86 | cmd = xhci_readl(xhci, &xhci->op_regs->command); | |
87 | cmd &= mask; | |
88 | xhci_writel(xhci, cmd, &xhci->op_regs->command); | |
4f0f0bae SS |
89 | } |
90 | ||
91 | /* | |
92 | * Force HC into halt state. | |
93 | * | |
94 | * Disable any IRQs and clear the run/stop bit. | |
95 | * HC will complete any current and actively pipelined transactions, and | |
bdfca502 | 96 | * should halt within 16 ms of the run/stop bit being cleared. |
4f0f0bae | 97 | * Read HC Halted bit in the status register to see when the HC is finished. |
4f0f0bae SS |
98 | */ |
99 | int xhci_halt(struct xhci_hcd *xhci) | |
100 | { | |
c6cc27c7 | 101 | int ret; |
4f0f0bae SS |
102 | xhci_dbg(xhci, "// Halt the HC\n"); |
103 | xhci_quiesce(xhci); | |
66d4eadd | 104 | |
c6cc27c7 | 105 | ret = handshake(xhci, &xhci->op_regs->status, |
66d4eadd | 106 | STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC); |
c6cc27c7 SS |
107 | if (!ret) |
108 | xhci->xhc_state |= XHCI_STATE_HALTED; | |
109 | return ret; | |
66d4eadd SS |
110 | } |
111 | ||
ed07453f SS |
112 | /* |
113 | * Set the run bit and wait for the host to be running. | |
114 | */ | |
8212a49d | 115 | static int xhci_start(struct xhci_hcd *xhci) |
ed07453f SS |
116 | { |
117 | u32 temp; | |
118 | int ret; | |
119 | ||
120 | temp = xhci_readl(xhci, &xhci->op_regs->command); | |
121 | temp |= (CMD_RUN); | |
122 | xhci_dbg(xhci, "// Turn on HC, cmd = 0x%x.\n", | |
123 | temp); | |
124 | xhci_writel(xhci, temp, &xhci->op_regs->command); | |
125 | ||
126 | /* | |
127 | * Wait for the HCHalted Status bit to be 0 to indicate the host is | |
128 | * running. | |
129 | */ | |
130 | ret = handshake(xhci, &xhci->op_regs->status, | |
131 | STS_HALT, 0, XHCI_MAX_HALT_USEC); | |
132 | if (ret == -ETIMEDOUT) | |
133 | xhci_err(xhci, "Host took too long to start, " | |
134 | "waited %u microseconds.\n", | |
135 | XHCI_MAX_HALT_USEC); | |
c6cc27c7 SS |
136 | if (!ret) |
137 | xhci->xhc_state &= ~XHCI_STATE_HALTED; | |
ed07453f SS |
138 | return ret; |
139 | } | |
140 | ||
66d4eadd | 141 | /* |
ac04e6ff | 142 | * Reset a halted HC. |
66d4eadd SS |
143 | * |
144 | * This resets pipelines, timers, counters, state machines, etc. | |
145 | * Transactions will be terminated immediately, and operational registers | |
146 | * will be set to their defaults. | |
147 | */ | |
148 | int xhci_reset(struct xhci_hcd *xhci) | |
149 | { | |
150 | u32 command; | |
151 | u32 state; | |
2d62f3ee | 152 | int ret; |
66d4eadd SS |
153 | |
154 | state = xhci_readl(xhci, &xhci->op_regs->status); | |
d3512f63 SS |
155 | if ((state & STS_HALT) == 0) { |
156 | xhci_warn(xhci, "Host controller not halted, aborting reset.\n"); | |
157 | return 0; | |
158 | } | |
66d4eadd SS |
159 | |
160 | xhci_dbg(xhci, "// Reset the HC\n"); | |
161 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
162 | command |= CMD_RESET; | |
163 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
66d4eadd | 164 | |
2d62f3ee SS |
165 | ret = handshake(xhci, &xhci->op_regs->command, |
166 | CMD_RESET, 0, 250 * 1000); | |
167 | if (ret) | |
168 | return ret; | |
169 | ||
170 | xhci_dbg(xhci, "Wait for controller to be ready for doorbell rings\n"); | |
171 | /* | |
172 | * xHCI cannot write to any doorbells or operational registers other | |
173 | * than status until the "Controller Not Ready" flag is cleared. | |
174 | */ | |
175 | return handshake(xhci, &xhci->op_regs->status, STS_CNR, 0, 250 * 1000); | |
66d4eadd SS |
176 | } |
177 | ||
421aa841 SAS |
178 | #ifdef CONFIG_PCI |
179 | static int xhci_free_msi(struct xhci_hcd *xhci) | |
43b86af8 DN |
180 | { |
181 | int i; | |
43b86af8 | 182 | |
421aa841 SAS |
183 | if (!xhci->msix_entries) |
184 | return -EINVAL; | |
43b86af8 | 185 | |
421aa841 SAS |
186 | for (i = 0; i < xhci->msix_count; i++) |
187 | if (xhci->msix_entries[i].vector) | |
188 | free_irq(xhci->msix_entries[i].vector, | |
189 | xhci_to_hcd(xhci)); | |
190 | return 0; | |
43b86af8 DN |
191 | } |
192 | ||
193 | /* | |
194 | * Set up MSI | |
195 | */ | |
196 | static int xhci_setup_msi(struct xhci_hcd *xhci) | |
66d4eadd SS |
197 | { |
198 | int ret; | |
43b86af8 DN |
199 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
200 | ||
201 | ret = pci_enable_msi(pdev); | |
202 | if (ret) { | |
203 | xhci_err(xhci, "failed to allocate MSI entry\n"); | |
204 | return ret; | |
205 | } | |
206 | ||
207 | ret = request_irq(pdev->irq, (irq_handler_t)xhci_msi_irq, | |
208 | 0, "xhci_hcd", xhci_to_hcd(xhci)); | |
209 | if (ret) { | |
210 | xhci_err(xhci, "disable MSI interrupt\n"); | |
211 | pci_disable_msi(pdev); | |
212 | } | |
213 | ||
214 | return ret; | |
215 | } | |
216 | ||
421aa841 SAS |
217 | /* |
218 | * Free IRQs | |
219 | * free all IRQs request | |
220 | */ | |
221 | static void xhci_free_irq(struct xhci_hcd *xhci) | |
222 | { | |
223 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); | |
224 | int ret; | |
225 | ||
226 | /* return if using legacy interrupt */ | |
227 | if (xhci_to_hcd(xhci)->irq >= 0) | |
228 | return; | |
229 | ||
230 | ret = xhci_free_msi(xhci); | |
231 | if (!ret) | |
232 | return; | |
233 | if (pdev->irq >= 0) | |
234 | free_irq(pdev->irq, xhci_to_hcd(xhci)); | |
235 | ||
236 | return; | |
237 | } | |
238 | ||
43b86af8 DN |
239 | /* |
240 | * Set up MSI-X | |
241 | */ | |
242 | static int xhci_setup_msix(struct xhci_hcd *xhci) | |
243 | { | |
244 | int i, ret = 0; | |
0029227f AX |
245 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
246 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
66d4eadd | 247 | |
43b86af8 DN |
248 | /* |
249 | * calculate number of msi-x vectors supported. | |
250 | * - HCS_MAX_INTRS: the max number of interrupts the host can handle, | |
251 | * with max number of interrupters based on the xhci HCSPARAMS1. | |
252 | * - num_online_cpus: maximum msi-x vectors per CPUs core. | |
253 | * Add additional 1 vector to ensure always available interrupt. | |
254 | */ | |
255 | xhci->msix_count = min(num_online_cpus() + 1, | |
256 | HCS_MAX_INTRS(xhci->hcs_params1)); | |
257 | ||
258 | xhci->msix_entries = | |
259 | kmalloc((sizeof(struct msix_entry))*xhci->msix_count, | |
86871975 | 260 | GFP_KERNEL); |
66d4eadd SS |
261 | if (!xhci->msix_entries) { |
262 | xhci_err(xhci, "Failed to allocate MSI-X entries\n"); | |
263 | return -ENOMEM; | |
264 | } | |
43b86af8 DN |
265 | |
266 | for (i = 0; i < xhci->msix_count; i++) { | |
267 | xhci->msix_entries[i].entry = i; | |
268 | xhci->msix_entries[i].vector = 0; | |
269 | } | |
66d4eadd SS |
270 | |
271 | ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count); | |
272 | if (ret) { | |
273 | xhci_err(xhci, "Failed to enable MSI-X\n"); | |
274 | goto free_entries; | |
275 | } | |
276 | ||
43b86af8 DN |
277 | for (i = 0; i < xhci->msix_count; i++) { |
278 | ret = request_irq(xhci->msix_entries[i].vector, | |
279 | (irq_handler_t)xhci_msi_irq, | |
280 | 0, "xhci_hcd", xhci_to_hcd(xhci)); | |
281 | if (ret) | |
282 | goto disable_msix; | |
66d4eadd | 283 | } |
43b86af8 | 284 | |
0029227f | 285 | hcd->msix_enabled = 1; |
43b86af8 | 286 | return ret; |
66d4eadd SS |
287 | |
288 | disable_msix: | |
43b86af8 DN |
289 | xhci_err(xhci, "disable MSI-X interrupt\n"); |
290 | xhci_free_irq(xhci); | |
66d4eadd SS |
291 | pci_disable_msix(pdev); |
292 | free_entries: | |
293 | kfree(xhci->msix_entries); | |
294 | xhci->msix_entries = NULL; | |
295 | return ret; | |
296 | } | |
297 | ||
66d4eadd SS |
298 | /* Free any IRQs and disable MSI-X */ |
299 | static void xhci_cleanup_msix(struct xhci_hcd *xhci) | |
300 | { | |
0029227f AX |
301 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
302 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
66d4eadd | 303 | |
43b86af8 DN |
304 | xhci_free_irq(xhci); |
305 | ||
306 | if (xhci->msix_entries) { | |
307 | pci_disable_msix(pdev); | |
308 | kfree(xhci->msix_entries); | |
309 | xhci->msix_entries = NULL; | |
310 | } else { | |
311 | pci_disable_msi(pdev); | |
312 | } | |
313 | ||
0029227f | 314 | hcd->msix_enabled = 0; |
43b86af8 | 315 | return; |
66d4eadd | 316 | } |
66d4eadd | 317 | |
421aa841 SAS |
318 | static void xhci_msix_sync_irqs(struct xhci_hcd *xhci) |
319 | { | |
320 | int i; | |
321 | ||
322 | if (xhci->msix_entries) { | |
323 | for (i = 0; i < xhci->msix_count; i++) | |
324 | synchronize_irq(xhci->msix_entries[i].vector); | |
325 | } | |
326 | } | |
327 | ||
328 | static int xhci_try_enable_msi(struct usb_hcd *hcd) | |
329 | { | |
330 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
331 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); | |
332 | int ret; | |
333 | ||
334 | /* | |
335 | * Some Fresco Logic host controllers advertise MSI, but fail to | |
336 | * generate interrupts. Don't even try to enable MSI. | |
337 | */ | |
338 | if (xhci->quirks & XHCI_BROKEN_MSI) | |
339 | return 0; | |
340 | ||
341 | /* unregister the legacy interrupt */ | |
342 | if (hcd->irq) | |
343 | free_irq(hcd->irq, hcd); | |
344 | hcd->irq = -1; | |
345 | ||
346 | ret = xhci_setup_msix(xhci); | |
347 | if (ret) | |
348 | /* fall back to msi*/ | |
349 | ret = xhci_setup_msi(xhci); | |
350 | ||
351 | if (!ret) | |
352 | /* hcd->irq is -1, we have MSI */ | |
353 | return 0; | |
354 | ||
355 | /* fall back to legacy interrupt*/ | |
356 | ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED, | |
357 | hcd->irq_descr, hcd); | |
358 | if (ret) { | |
359 | xhci_err(xhci, "request interrupt %d failed\n", | |
360 | pdev->irq); | |
361 | return ret; | |
362 | } | |
363 | hcd->irq = pdev->irq; | |
364 | return 0; | |
365 | } | |
366 | ||
367 | #else | |
368 | ||
369 | static int xhci_try_enable_msi(struct usb_hcd *hcd) | |
370 | { | |
371 | return 0; | |
372 | } | |
373 | ||
374 | static void xhci_cleanup_msix(struct xhci_hcd *xhci) | |
375 | { | |
376 | } | |
377 | ||
378 | static void xhci_msix_sync_irqs(struct xhci_hcd *xhci) | |
379 | { | |
380 | } | |
381 | ||
382 | #endif | |
383 | ||
66d4eadd SS |
384 | /* |
385 | * Initialize memory for HCD and xHC (one-time init). | |
386 | * | |
387 | * Program the PAGESIZE register, initialize the device context array, create | |
388 | * device contexts (?), set up a command ring segment (or two?), create event | |
389 | * ring (one for now). | |
390 | */ | |
391 | int xhci_init(struct usb_hcd *hcd) | |
392 | { | |
393 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
394 | int retval = 0; | |
395 | ||
396 | xhci_dbg(xhci, "xhci_init\n"); | |
397 | spin_lock_init(&xhci->lock); | |
d7826599 | 398 | if (xhci->hci_version == 0x95 && link_quirk) { |
b0567b3f SS |
399 | xhci_dbg(xhci, "QUIRK: Not clearing Link TRB chain bits.\n"); |
400 | xhci->quirks |= XHCI_LINK_TRB_QUIRK; | |
401 | } else { | |
ac9d8fe7 | 402 | xhci_dbg(xhci, "xHCI doesn't need link TRB QUIRK\n"); |
b0567b3f | 403 | } |
66d4eadd SS |
404 | retval = xhci_mem_init(xhci, GFP_KERNEL); |
405 | xhci_dbg(xhci, "Finished xhci_init\n"); | |
406 | ||
407 | return retval; | |
408 | } | |
409 | ||
7f84eef0 SS |
410 | /*-------------------------------------------------------------------------*/ |
411 | ||
7f84eef0 SS |
412 | |
413 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING | |
8212a49d | 414 | static void xhci_event_ring_work(unsigned long arg) |
7f84eef0 SS |
415 | { |
416 | unsigned long flags; | |
417 | int temp; | |
8e595a5d | 418 | u64 temp_64; |
7f84eef0 SS |
419 | struct xhci_hcd *xhci = (struct xhci_hcd *) arg; |
420 | int i, j; | |
421 | ||
422 | xhci_dbg(xhci, "Poll event ring: %lu\n", jiffies); | |
423 | ||
424 | spin_lock_irqsave(&xhci->lock, flags); | |
425 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
426 | xhci_dbg(xhci, "op reg status = 0x%x\n", temp); | |
7bd89b40 SS |
427 | if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING) || |
428 | (xhci->xhc_state & XHCI_STATE_HALTED)) { | |
e4ab05df SS |
429 | xhci_dbg(xhci, "HW died, polling stopped.\n"); |
430 | spin_unlock_irqrestore(&xhci->lock, flags); | |
431 | return; | |
432 | } | |
433 | ||
7f84eef0 SS |
434 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); |
435 | xhci_dbg(xhci, "ir_set 0 pending = 0x%x\n", temp); | |
7f84eef0 SS |
436 | xhci_dbg(xhci, "HC error bitmask = 0x%x\n", xhci->error_bitmask); |
437 | xhci->error_bitmask = 0; | |
438 | xhci_dbg(xhci, "Event ring:\n"); | |
439 | xhci_debug_segment(xhci, xhci->event_ring->deq_seg); | |
440 | xhci_dbg_ring_ptrs(xhci, xhci->event_ring); | |
8e595a5d SS |
441 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
442 | temp_64 &= ~ERST_PTR_MASK; | |
443 | xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); | |
7f84eef0 SS |
444 | xhci_dbg(xhci, "Command ring:\n"); |
445 | xhci_debug_segment(xhci, xhci->cmd_ring->deq_seg); | |
446 | xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); | |
447 | xhci_dbg_cmd_ptrs(xhci); | |
3ffbba95 | 448 | for (i = 0; i < MAX_HC_SLOTS; ++i) { |
63a0d9ab SS |
449 | if (!xhci->devs[i]) |
450 | continue; | |
451 | for (j = 0; j < 31; ++j) { | |
e9df17eb | 452 | xhci_dbg_ep_rings(xhci, i, j, &xhci->devs[i]->eps[j]); |
3ffbba95 SS |
453 | } |
454 | } | |
7f84eef0 SS |
455 | spin_unlock_irqrestore(&xhci->lock, flags); |
456 | ||
457 | if (!xhci->zombie) | |
458 | mod_timer(&xhci->event_ring_timer, jiffies + POLL_TIMEOUT * HZ); | |
459 | else | |
460 | xhci_dbg(xhci, "Quit polling the event ring.\n"); | |
461 | } | |
462 | #endif | |
463 | ||
f6ff0ac8 SS |
464 | static int xhci_run_finished(struct xhci_hcd *xhci) |
465 | { | |
466 | if (xhci_start(xhci)) { | |
467 | xhci_halt(xhci); | |
468 | return -ENODEV; | |
469 | } | |
470 | xhci->shared_hcd->state = HC_STATE_RUNNING; | |
471 | ||
472 | if (xhci->quirks & XHCI_NEC_HOST) | |
473 | xhci_ring_cmd_db(xhci); | |
474 | ||
475 | xhci_dbg(xhci, "Finished xhci_run for USB3 roothub\n"); | |
476 | return 0; | |
477 | } | |
478 | ||
66d4eadd SS |
479 | /* |
480 | * Start the HC after it was halted. | |
481 | * | |
482 | * This function is called by the USB core when the HC driver is added. | |
483 | * Its opposite is xhci_stop(). | |
484 | * | |
485 | * xhci_init() must be called once before this function can be called. | |
486 | * Reset the HC, enable device slot contexts, program DCBAAP, and | |
487 | * set command ring pointer and event ring pointer. | |
488 | * | |
489 | * Setup MSI-X vectors and enable interrupts. | |
490 | */ | |
491 | int xhci_run(struct usb_hcd *hcd) | |
492 | { | |
493 | u32 temp; | |
8e595a5d | 494 | u64 temp_64; |
3fd1ec58 | 495 | int ret; |
66d4eadd | 496 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
66d4eadd | 497 | |
f6ff0ac8 SS |
498 | /* Start the xHCI host controller running only after the USB 2.0 roothub |
499 | * is setup. | |
500 | */ | |
66d4eadd | 501 | |
0f2a7930 | 502 | hcd->uses_new_polling = 1; |
f6ff0ac8 SS |
503 | if (!usb_hcd_is_primary_hcd(hcd)) |
504 | return xhci_run_finished(xhci); | |
0f2a7930 | 505 | |
7f84eef0 | 506 | xhci_dbg(xhci, "xhci_run\n"); |
43b86af8 | 507 | |
3fd1ec58 | 508 | ret = xhci_try_enable_msi(hcd); |
43b86af8 | 509 | if (ret) |
3fd1ec58 | 510 | return ret; |
66d4eadd | 511 | |
7f84eef0 SS |
512 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
513 | init_timer(&xhci->event_ring_timer); | |
514 | xhci->event_ring_timer.data = (unsigned long) xhci; | |
23e3be11 | 515 | xhci->event_ring_timer.function = xhci_event_ring_work; |
7f84eef0 SS |
516 | /* Poll the event ring */ |
517 | xhci->event_ring_timer.expires = jiffies + POLL_TIMEOUT * HZ; | |
518 | xhci->zombie = 0; | |
519 | xhci_dbg(xhci, "Setting event ring polling timer\n"); | |
520 | add_timer(&xhci->event_ring_timer); | |
521 | #endif | |
522 | ||
66e49d87 SS |
523 | xhci_dbg(xhci, "Command ring memory map follows:\n"); |
524 | xhci_debug_ring(xhci, xhci->cmd_ring); | |
525 | xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); | |
526 | xhci_dbg_cmd_ptrs(xhci); | |
527 | ||
528 | xhci_dbg(xhci, "ERST memory map follows:\n"); | |
529 | xhci_dbg_erst(xhci, &xhci->erst); | |
530 | xhci_dbg(xhci, "Event ring:\n"); | |
531 | xhci_debug_ring(xhci, xhci->event_ring); | |
532 | xhci_dbg_ring_ptrs(xhci, xhci->event_ring); | |
533 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); | |
534 | temp_64 &= ~ERST_PTR_MASK; | |
535 | xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); | |
536 | ||
66d4eadd SS |
537 | xhci_dbg(xhci, "// Set the interrupt modulation register\n"); |
538 | temp = xhci_readl(xhci, &xhci->ir_set->irq_control); | |
a4d88302 | 539 | temp &= ~ER_IRQ_INTERVAL_MASK; |
66d4eadd SS |
540 | temp |= (u32) 160; |
541 | xhci_writel(xhci, temp, &xhci->ir_set->irq_control); | |
542 | ||
543 | /* Set the HCD state before we enable the irqs */ | |
66d4eadd SS |
544 | temp = xhci_readl(xhci, &xhci->op_regs->command); |
545 | temp |= (CMD_EIE); | |
546 | xhci_dbg(xhci, "// Enable interrupts, cmd = 0x%x.\n", | |
547 | temp); | |
548 | xhci_writel(xhci, temp, &xhci->op_regs->command); | |
549 | ||
550 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
700e2052 GKH |
551 | xhci_dbg(xhci, "// Enabling event ring interrupter %p by writing 0x%x to irq_pending\n", |
552 | xhci->ir_set, (unsigned int) ER_IRQ_ENABLE(temp)); | |
66d4eadd SS |
553 | xhci_writel(xhci, ER_IRQ_ENABLE(temp), |
554 | &xhci->ir_set->irq_pending); | |
09ece30e | 555 | xhci_print_ir_set(xhci, 0); |
66d4eadd | 556 | |
0238634d SS |
557 | if (xhci->quirks & XHCI_NEC_HOST) |
558 | xhci_queue_vendor_command(xhci, 0, 0, 0, | |
559 | TRB_TYPE(TRB_NEC_GET_FW)); | |
7f84eef0 | 560 | |
f6ff0ac8 SS |
561 | xhci_dbg(xhci, "Finished xhci_run for USB2 roothub\n"); |
562 | return 0; | |
563 | } | |
ed07453f | 564 | |
f6ff0ac8 SS |
565 | static void xhci_only_stop_hcd(struct usb_hcd *hcd) |
566 | { | |
567 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
66d4eadd | 568 | |
f6ff0ac8 SS |
569 | spin_lock_irq(&xhci->lock); |
570 | xhci_halt(xhci); | |
571 | ||
572 | /* The shared_hcd is going to be deallocated shortly (the USB core only | |
573 | * calls this function when allocation fails in usb_add_hcd(), or | |
574 | * usb_remove_hcd() is called). So we need to unset xHCI's pointer. | |
575 | */ | |
576 | xhci->shared_hcd = NULL; | |
577 | spin_unlock_irq(&xhci->lock); | |
66d4eadd SS |
578 | } |
579 | ||
580 | /* | |
581 | * Stop xHCI driver. | |
582 | * | |
583 | * This function is called by the USB core when the HC driver is removed. | |
584 | * Its opposite is xhci_run(). | |
585 | * | |
586 | * Disable device contexts, disable IRQs, and quiesce the HC. | |
587 | * Reset the HC, finish any completed transactions, and cleanup memory. | |
588 | */ | |
589 | void xhci_stop(struct usb_hcd *hcd) | |
590 | { | |
591 | u32 temp; | |
592 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
593 | ||
f6ff0ac8 SS |
594 | if (!usb_hcd_is_primary_hcd(hcd)) { |
595 | xhci_only_stop_hcd(xhci->shared_hcd); | |
596 | return; | |
597 | } | |
598 | ||
66d4eadd | 599 | spin_lock_irq(&xhci->lock); |
f6ff0ac8 SS |
600 | /* Make sure the xHC is halted for a USB3 roothub |
601 | * (xhci_stop() could be called as part of failed init). | |
602 | */ | |
66d4eadd SS |
603 | xhci_halt(xhci); |
604 | xhci_reset(xhci); | |
605 | spin_unlock_irq(&xhci->lock); | |
606 | ||
40a9fb17 ZR |
607 | xhci_cleanup_msix(xhci); |
608 | ||
7f84eef0 SS |
609 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
610 | /* Tell the event ring poll function not to reschedule */ | |
611 | xhci->zombie = 1; | |
612 | del_timer_sync(&xhci->event_ring_timer); | |
613 | #endif | |
614 | ||
c41136b0 AX |
615 | if (xhci->quirks & XHCI_AMD_PLL_FIX) |
616 | usb_amd_dev_put(); | |
617 | ||
66d4eadd SS |
618 | xhci_dbg(xhci, "// Disabling event ring interrupts\n"); |
619 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
620 | xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status); | |
621 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
622 | xhci_writel(xhci, ER_IRQ_DISABLE(temp), | |
623 | &xhci->ir_set->irq_pending); | |
09ece30e | 624 | xhci_print_ir_set(xhci, 0); |
66d4eadd SS |
625 | |
626 | xhci_dbg(xhci, "cleaning up memory\n"); | |
627 | xhci_mem_cleanup(xhci); | |
628 | xhci_dbg(xhci, "xhci_stop completed - status = %x\n", | |
629 | xhci_readl(xhci, &xhci->op_regs->status)); | |
630 | } | |
631 | ||
632 | /* | |
633 | * Shutdown HC (not bus-specific) | |
634 | * | |
635 | * This is called when the machine is rebooting or halting. We assume that the | |
636 | * machine will be powered off, and the HC's internal state will be reset. | |
637 | * Don't bother to free memory. | |
f6ff0ac8 SS |
638 | * |
639 | * This will only ever be called with the main usb_hcd (the USB3 roothub). | |
66d4eadd SS |
640 | */ |
641 | void xhci_shutdown(struct usb_hcd *hcd) | |
642 | { | |
643 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
644 | ||
645 | spin_lock_irq(&xhci->lock); | |
646 | xhci_halt(xhci); | |
43b86af8 | 647 | spin_unlock_irq(&xhci->lock); |
66d4eadd | 648 | |
40a9fb17 ZR |
649 | xhci_cleanup_msix(xhci); |
650 | ||
66d4eadd SS |
651 | xhci_dbg(xhci, "xhci_shutdown completed - status = %x\n", |
652 | xhci_readl(xhci, &xhci->op_regs->status)); | |
653 | } | |
654 | ||
b5b5c3ac | 655 | #ifdef CONFIG_PM |
5535b1d5 AX |
656 | static void xhci_save_registers(struct xhci_hcd *xhci) |
657 | { | |
658 | xhci->s3.command = xhci_readl(xhci, &xhci->op_regs->command); | |
659 | xhci->s3.dev_nt = xhci_readl(xhci, &xhci->op_regs->dev_notification); | |
660 | xhci->s3.dcbaa_ptr = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); | |
661 | xhci->s3.config_reg = xhci_readl(xhci, &xhci->op_regs->config_reg); | |
662 | xhci->s3.irq_pending = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
663 | xhci->s3.irq_control = xhci_readl(xhci, &xhci->ir_set->irq_control); | |
664 | xhci->s3.erst_size = xhci_readl(xhci, &xhci->ir_set->erst_size); | |
665 | xhci->s3.erst_base = xhci_read_64(xhci, &xhci->ir_set->erst_base); | |
666 | xhci->s3.erst_dequeue = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); | |
667 | } | |
668 | ||
669 | static void xhci_restore_registers(struct xhci_hcd *xhci) | |
670 | { | |
671 | xhci_writel(xhci, xhci->s3.command, &xhci->op_regs->command); | |
672 | xhci_writel(xhci, xhci->s3.dev_nt, &xhci->op_regs->dev_notification); | |
673 | xhci_write_64(xhci, xhci->s3.dcbaa_ptr, &xhci->op_regs->dcbaa_ptr); | |
674 | xhci_writel(xhci, xhci->s3.config_reg, &xhci->op_regs->config_reg); | |
675 | xhci_writel(xhci, xhci->s3.irq_pending, &xhci->ir_set->irq_pending); | |
676 | xhci_writel(xhci, xhci->s3.irq_control, &xhci->ir_set->irq_control); | |
677 | xhci_writel(xhci, xhci->s3.erst_size, &xhci->ir_set->erst_size); | |
678 | xhci_write_64(xhci, xhci->s3.erst_base, &xhci->ir_set->erst_base); | |
679 | } | |
680 | ||
89821320 SS |
681 | static void xhci_set_cmd_ring_deq(struct xhci_hcd *xhci) |
682 | { | |
683 | u64 val_64; | |
684 | ||
685 | /* step 2: initialize command ring buffer */ | |
686 | val_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); | |
687 | val_64 = (val_64 & (u64) CMD_RING_RSVD_BITS) | | |
688 | (xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg, | |
689 | xhci->cmd_ring->dequeue) & | |
690 | (u64) ~CMD_RING_RSVD_BITS) | | |
691 | xhci->cmd_ring->cycle_state; | |
692 | xhci_dbg(xhci, "// Setting command ring address to 0x%llx\n", | |
693 | (long unsigned long) val_64); | |
694 | xhci_write_64(xhci, val_64, &xhci->op_regs->cmd_ring); | |
695 | } | |
696 | ||
697 | /* | |
698 | * The whole command ring must be cleared to zero when we suspend the host. | |
699 | * | |
700 | * The host doesn't save the command ring pointer in the suspend well, so we | |
701 | * need to re-program it on resume. Unfortunately, the pointer must be 64-byte | |
702 | * aligned, because of the reserved bits in the command ring dequeue pointer | |
703 | * register. Therefore, we can't just set the dequeue pointer back in the | |
704 | * middle of the ring (TRBs are 16-byte aligned). | |
705 | */ | |
706 | static void xhci_clear_command_ring(struct xhci_hcd *xhci) | |
707 | { | |
708 | struct xhci_ring *ring; | |
709 | struct xhci_segment *seg; | |
710 | ||
711 | ring = xhci->cmd_ring; | |
712 | seg = ring->deq_seg; | |
713 | do { | |
714 | memset(seg->trbs, 0, SEGMENT_SIZE); | |
715 | seg = seg->next; | |
716 | } while (seg != ring->deq_seg); | |
717 | ||
718 | /* Reset the software enqueue and dequeue pointers */ | |
719 | ring->deq_seg = ring->first_seg; | |
720 | ring->dequeue = ring->first_seg->trbs; | |
721 | ring->enq_seg = ring->deq_seg; | |
722 | ring->enqueue = ring->dequeue; | |
723 | ||
724 | /* | |
725 | * Ring is now zeroed, so the HW should look for change of ownership | |
726 | * when the cycle bit is set to 1. | |
727 | */ | |
728 | ring->cycle_state = 1; | |
729 | ||
730 | /* | |
731 | * Reset the hardware dequeue pointer. | |
732 | * Yes, this will need to be re-written after resume, but we're paranoid | |
733 | * and want to make sure the hardware doesn't access bogus memory | |
734 | * because, say, the BIOS or an SMI started the host without changing | |
735 | * the command ring pointers. | |
736 | */ | |
737 | xhci_set_cmd_ring_deq(xhci); | |
738 | } | |
739 | ||
5535b1d5 AX |
740 | /* |
741 | * Stop HC (not bus-specific) | |
742 | * | |
743 | * This is called when the machine transition into S3/S4 mode. | |
744 | * | |
745 | */ | |
746 | int xhci_suspend(struct xhci_hcd *xhci) | |
747 | { | |
748 | int rc = 0; | |
749 | struct usb_hcd *hcd = xhci_to_hcd(xhci); | |
750 | u32 command; | |
751 | ||
752 | spin_lock_irq(&xhci->lock); | |
753 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
b3209379 | 754 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags); |
5535b1d5 AX |
755 | /* step 1: stop endpoint */ |
756 | /* skipped assuming that port suspend has done */ | |
757 | ||
758 | /* step 2: clear Run/Stop bit */ | |
759 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
760 | command &= ~CMD_RUN; | |
761 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
762 | if (handshake(xhci, &xhci->op_regs->status, | |
763 | STS_HALT, STS_HALT, 100*100)) { | |
764 | xhci_warn(xhci, "WARN: xHC CMD_RUN timeout\n"); | |
765 | spin_unlock_irq(&xhci->lock); | |
766 | return -ETIMEDOUT; | |
767 | } | |
89821320 | 768 | xhci_clear_command_ring(xhci); |
5535b1d5 AX |
769 | |
770 | /* step 3: save registers */ | |
771 | xhci_save_registers(xhci); | |
772 | ||
773 | /* step 4: set CSS flag */ | |
774 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
775 | command |= CMD_CSS; | |
776 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
777 | if (handshake(xhci, &xhci->op_regs->status, STS_SAVE, 0, 10*100)) { | |
778 | xhci_warn(xhci, "WARN: xHC CMD_CSS timeout\n"); | |
779 | spin_unlock_irq(&xhci->lock); | |
780 | return -ETIMEDOUT; | |
781 | } | |
5535b1d5 AX |
782 | spin_unlock_irq(&xhci->lock); |
783 | ||
0029227f AX |
784 | /* step 5: remove core well power */ |
785 | /* synchronize irq when using MSI-X */ | |
421aa841 | 786 | xhci_msix_sync_irqs(xhci); |
0029227f | 787 | |
5535b1d5 AX |
788 | return rc; |
789 | } | |
790 | ||
791 | /* | |
792 | * start xHC (not bus-specific) | |
793 | * | |
794 | * This is called when the machine transition from S3/S4 mode. | |
795 | * | |
796 | */ | |
797 | int xhci_resume(struct xhci_hcd *xhci, bool hibernated) | |
798 | { | |
799 | u32 command, temp = 0; | |
800 | struct usb_hcd *hcd = xhci_to_hcd(xhci); | |
65b22f93 | 801 | struct usb_hcd *secondary_hcd; |
019a35f1 | 802 | int retval; |
5535b1d5 | 803 | |
f6ff0ac8 | 804 | /* Wait a bit if either of the roothubs need to settle from the |
25985edc | 805 | * transition into bus suspend. |
20b67cf5 | 806 | */ |
f6ff0ac8 SS |
807 | if (time_before(jiffies, xhci->bus_state[0].next_statechange) || |
808 | time_before(jiffies, | |
809 | xhci->bus_state[1].next_statechange)) | |
5535b1d5 AX |
810 | msleep(100); |
811 | ||
812 | spin_lock_irq(&xhci->lock); | |
c877b3b2 ML |
813 | if (xhci->quirks & XHCI_RESET_ON_RESUME) |
814 | hibernated = true; | |
5535b1d5 AX |
815 | |
816 | if (!hibernated) { | |
817 | /* step 1: restore register */ | |
818 | xhci_restore_registers(xhci); | |
819 | /* step 2: initialize command ring buffer */ | |
89821320 | 820 | xhci_set_cmd_ring_deq(xhci); |
5535b1d5 AX |
821 | /* step 3: restore state and start state*/ |
822 | /* step 3: set CRS flag */ | |
823 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
824 | command |= CMD_CRS; | |
825 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
826 | if (handshake(xhci, &xhci->op_regs->status, | |
827 | STS_RESTORE, 0, 10*100)) { | |
828 | xhci_dbg(xhci, "WARN: xHC CMD_CSS timeout\n"); | |
829 | spin_unlock_irq(&xhci->lock); | |
830 | return -ETIMEDOUT; | |
831 | } | |
832 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
833 | } | |
834 | ||
835 | /* If restore operation fails, re-initialize the HC during resume */ | |
836 | if ((temp & STS_SRE) || hibernated) { | |
fedd383e SS |
837 | /* Let the USB core know _both_ roothubs lost power. */ |
838 | usb_root_hub_lost_power(xhci->main_hcd->self.root_hub); | |
839 | usb_root_hub_lost_power(xhci->shared_hcd->self.root_hub); | |
5535b1d5 AX |
840 | |
841 | xhci_dbg(xhci, "Stop HCD\n"); | |
842 | xhci_halt(xhci); | |
843 | xhci_reset(xhci); | |
5535b1d5 | 844 | spin_unlock_irq(&xhci->lock); |
0029227f | 845 | xhci_cleanup_msix(xhci); |
5535b1d5 AX |
846 | |
847 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING | |
848 | /* Tell the event ring poll function not to reschedule */ | |
849 | xhci->zombie = 1; | |
850 | del_timer_sync(&xhci->event_ring_timer); | |
851 | #endif | |
852 | ||
853 | xhci_dbg(xhci, "// Disabling event ring interrupts\n"); | |
854 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
855 | xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status); | |
856 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
857 | xhci_writel(xhci, ER_IRQ_DISABLE(temp), | |
858 | &xhci->ir_set->irq_pending); | |
09ece30e | 859 | xhci_print_ir_set(xhci, 0); |
5535b1d5 AX |
860 | |
861 | xhci_dbg(xhci, "cleaning up memory\n"); | |
862 | xhci_mem_cleanup(xhci); | |
863 | xhci_dbg(xhci, "xhci_stop completed - status = %x\n", | |
864 | xhci_readl(xhci, &xhci->op_regs->status)); | |
865 | ||
65b22f93 SS |
866 | /* USB core calls the PCI reinit and start functions twice: |
867 | * first with the primary HCD, and then with the secondary HCD. | |
868 | * If we don't do the same, the host will never be started. | |
869 | */ | |
870 | if (!usb_hcd_is_primary_hcd(hcd)) | |
871 | secondary_hcd = hcd; | |
872 | else | |
873 | secondary_hcd = xhci->shared_hcd; | |
874 | ||
875 | xhci_dbg(xhci, "Initialize the xhci_hcd\n"); | |
876 | retval = xhci_init(hcd->primary_hcd); | |
5535b1d5 AX |
877 | if (retval) |
878 | return retval; | |
65b22f93 SS |
879 | xhci_dbg(xhci, "Start the primary HCD\n"); |
880 | retval = xhci_run(hcd->primary_hcd); | |
881 | if (retval) | |
882 | goto failed_restart; | |
5535b1d5 | 883 | |
65b22f93 SS |
884 | xhci_dbg(xhci, "Start the secondary HCD\n"); |
885 | retval = xhci_run(secondary_hcd); | |
b3209379 | 886 | if (!retval) { |
5535b1d5 | 887 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
b3209379 SS |
888 | set_bit(HCD_FLAG_HW_ACCESSIBLE, |
889 | &xhci->shared_hcd->flags); | |
890 | } | |
65b22f93 | 891 | failed_restart: |
5535b1d5 | 892 | hcd->state = HC_STATE_SUSPENDED; |
b3209379 | 893 | xhci->shared_hcd->state = HC_STATE_SUSPENDED; |
5535b1d5 AX |
894 | return retval; |
895 | } | |
896 | ||
5535b1d5 AX |
897 | /* step 4: set Run/Stop bit */ |
898 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
899 | command |= CMD_RUN; | |
900 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
901 | handshake(xhci, &xhci->op_regs->status, STS_HALT, | |
902 | 0, 250 * 1000); | |
903 | ||
904 | /* step 5: walk topology and initialize portsc, | |
905 | * portpmsc and portli | |
906 | */ | |
907 | /* this is done in bus_resume */ | |
908 | ||
909 | /* step 6: restart each of the previously | |
910 | * Running endpoints by ringing their doorbells | |
911 | */ | |
912 | ||
913 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
b3209379 | 914 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags); |
5535b1d5 AX |
915 | |
916 | spin_unlock_irq(&xhci->lock); | |
917 | return 0; | |
918 | } | |
b5b5c3ac SS |
919 | #endif /* CONFIG_PM */ |
920 | ||
7f84eef0 SS |
921 | /*-------------------------------------------------------------------------*/ |
922 | ||
d0e96f5a SS |
923 | /** |
924 | * xhci_get_endpoint_index - Used for passing endpoint bitmasks between the core and | |
925 | * HCDs. Find the index for an endpoint given its descriptor. Use the return | |
926 | * value to right shift 1 for the bitmask. | |
927 | * | |
928 | * Index = (epnum * 2) + direction - 1, | |
929 | * where direction = 0 for OUT, 1 for IN. | |
930 | * For control endpoints, the IN index is used (OUT index is unused), so | |
931 | * index = (epnum * 2) + direction - 1 = (epnum * 2) + 1 - 1 = (epnum * 2) | |
932 | */ | |
933 | unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc) | |
934 | { | |
935 | unsigned int index; | |
936 | if (usb_endpoint_xfer_control(desc)) | |
937 | index = (unsigned int) (usb_endpoint_num(desc)*2); | |
938 | else | |
939 | index = (unsigned int) (usb_endpoint_num(desc)*2) + | |
940 | (usb_endpoint_dir_in(desc) ? 1 : 0) - 1; | |
941 | return index; | |
942 | } | |
943 | ||
f94e0186 SS |
944 | /* Find the flag for this endpoint (for use in the control context). Use the |
945 | * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is | |
946 | * bit 1, etc. | |
947 | */ | |
948 | unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc) | |
949 | { | |
950 | return 1 << (xhci_get_endpoint_index(desc) + 1); | |
951 | } | |
952 | ||
ac9d8fe7 SS |
953 | /* Find the flag for this endpoint (for use in the control context). Use the |
954 | * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is | |
955 | * bit 1, etc. | |
956 | */ | |
957 | unsigned int xhci_get_endpoint_flag_from_index(unsigned int ep_index) | |
958 | { | |
959 | return 1 << (ep_index + 1); | |
960 | } | |
961 | ||
f94e0186 SS |
962 | /* Compute the last valid endpoint context index. Basically, this is the |
963 | * endpoint index plus one. For slot contexts with more than valid endpoint, | |
964 | * we find the most significant bit set in the added contexts flags. | |
965 | * e.g. ep 1 IN (with epnum 0x81) => added_ctxs = 0b1000 | |
966 | * fls(0b1000) = 4, but the endpoint context index is 3, so subtract one. | |
967 | */ | |
ac9d8fe7 | 968 | unsigned int xhci_last_valid_endpoint(u32 added_ctxs) |
f94e0186 SS |
969 | { |
970 | return fls(added_ctxs) - 1; | |
971 | } | |
972 | ||
d0e96f5a SS |
973 | /* Returns 1 if the arguments are OK; |
974 | * returns 0 this is a root hub; returns -EINVAL for NULL pointers. | |
975 | */ | |
8212a49d | 976 | static int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev, |
64927730 AX |
977 | struct usb_host_endpoint *ep, int check_ep, bool check_virt_dev, |
978 | const char *func) { | |
979 | struct xhci_hcd *xhci; | |
980 | struct xhci_virt_device *virt_dev; | |
981 | ||
d0e96f5a SS |
982 | if (!hcd || (check_ep && !ep) || !udev) { |
983 | printk(KERN_DEBUG "xHCI %s called with invalid args\n", | |
984 | func); | |
985 | return -EINVAL; | |
986 | } | |
987 | if (!udev->parent) { | |
988 | printk(KERN_DEBUG "xHCI %s called for root hub\n", | |
989 | func); | |
990 | return 0; | |
991 | } | |
64927730 | 992 | |
7bd89b40 SS |
993 | xhci = hcd_to_xhci(hcd); |
994 | if (xhci->xhc_state & XHCI_STATE_HALTED) | |
995 | return -ENODEV; | |
996 | ||
64927730 | 997 | if (check_virt_dev) { |
73ddc247 | 998 | if (!udev->slot_id || !xhci->devs[udev->slot_id]) { |
64927730 AX |
999 | printk(KERN_DEBUG "xHCI %s called with unaddressed " |
1000 | "device\n", func); | |
1001 | return -EINVAL; | |
1002 | } | |
1003 | ||
1004 | virt_dev = xhci->devs[udev->slot_id]; | |
1005 | if (virt_dev->udev != udev) { | |
1006 | printk(KERN_DEBUG "xHCI %s called with udev and " | |
1007 | "virt_dev does not match\n", func); | |
1008 | return -EINVAL; | |
1009 | } | |
d0e96f5a | 1010 | } |
64927730 | 1011 | |
d0e96f5a SS |
1012 | return 1; |
1013 | } | |
1014 | ||
2d3f1fac | 1015 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, |
913a8a34 SS |
1016 | struct usb_device *udev, struct xhci_command *command, |
1017 | bool ctx_change, bool must_succeed); | |
2d3f1fac SS |
1018 | |
1019 | /* | |
1020 | * Full speed devices may have a max packet size greater than 8 bytes, but the | |
1021 | * USB core doesn't know that until it reads the first 8 bytes of the | |
1022 | * descriptor. If the usb_device's max packet size changes after that point, | |
1023 | * we need to issue an evaluate context command and wait on it. | |
1024 | */ | |
1025 | static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id, | |
1026 | unsigned int ep_index, struct urb *urb) | |
1027 | { | |
1028 | struct xhci_container_ctx *in_ctx; | |
1029 | struct xhci_container_ctx *out_ctx; | |
1030 | struct xhci_input_control_ctx *ctrl_ctx; | |
1031 | struct xhci_ep_ctx *ep_ctx; | |
1032 | int max_packet_size; | |
1033 | int hw_max_packet_size; | |
1034 | int ret = 0; | |
1035 | ||
1036 | out_ctx = xhci->devs[slot_id]->out_ctx; | |
1037 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); | |
28ccd296 | 1038 | hw_max_packet_size = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2)); |
29cc8897 | 1039 | max_packet_size = usb_endpoint_maxp(&urb->dev->ep0.desc); |
2d3f1fac SS |
1040 | if (hw_max_packet_size != max_packet_size) { |
1041 | xhci_dbg(xhci, "Max Packet Size for ep 0 changed.\n"); | |
1042 | xhci_dbg(xhci, "Max packet size in usb_device = %d\n", | |
1043 | max_packet_size); | |
1044 | xhci_dbg(xhci, "Max packet size in xHCI HW = %d\n", | |
1045 | hw_max_packet_size); | |
1046 | xhci_dbg(xhci, "Issuing evaluate context command.\n"); | |
1047 | ||
1048 | /* Set up the modified control endpoint 0 */ | |
913a8a34 SS |
1049 | xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, |
1050 | xhci->devs[slot_id]->out_ctx, ep_index); | |
2d3f1fac SS |
1051 | in_ctx = xhci->devs[slot_id]->in_ctx; |
1052 | ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); | |
28ccd296 ME |
1053 | ep_ctx->ep_info2 &= cpu_to_le32(~MAX_PACKET_MASK); |
1054 | ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet_size)); | |
2d3f1fac SS |
1055 | |
1056 | /* Set up the input context flags for the command */ | |
1057 | /* FIXME: This won't work if a non-default control endpoint | |
1058 | * changes max packet sizes. | |
1059 | */ | |
1060 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
28ccd296 | 1061 | ctrl_ctx->add_flags = cpu_to_le32(EP0_FLAG); |
2d3f1fac SS |
1062 | ctrl_ctx->drop_flags = 0; |
1063 | ||
1064 | xhci_dbg(xhci, "Slot %d input context\n", slot_id); | |
1065 | xhci_dbg_ctx(xhci, in_ctx, ep_index); | |
1066 | xhci_dbg(xhci, "Slot %d output context\n", slot_id); | |
1067 | xhci_dbg_ctx(xhci, out_ctx, ep_index); | |
1068 | ||
913a8a34 SS |
1069 | ret = xhci_configure_endpoint(xhci, urb->dev, NULL, |
1070 | true, false); | |
2d3f1fac SS |
1071 | |
1072 | /* Clean up the input context for later use by bandwidth | |
1073 | * functions. | |
1074 | */ | |
28ccd296 | 1075 | ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG); |
2d3f1fac SS |
1076 | } |
1077 | return ret; | |
1078 | } | |
1079 | ||
d0e96f5a SS |
1080 | /* |
1081 | * non-error returns are a promise to giveback() the urb later | |
1082 | * we drop ownership so next owner (or urb unlink) can get it | |
1083 | */ | |
1084 | int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) | |
1085 | { | |
1086 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
2ffdea25 | 1087 | struct xhci_td *buffer; |
d0e96f5a SS |
1088 | unsigned long flags; |
1089 | int ret = 0; | |
1090 | unsigned int slot_id, ep_index; | |
8e51adcc AX |
1091 | struct urb_priv *urb_priv; |
1092 | int size, i; | |
2d3f1fac | 1093 | |
64927730 AX |
1094 | if (!urb || xhci_check_args(hcd, urb->dev, urb->ep, |
1095 | true, true, __func__) <= 0) | |
d0e96f5a SS |
1096 | return -EINVAL; |
1097 | ||
1098 | slot_id = urb->dev->slot_id; | |
1099 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); | |
d0e96f5a | 1100 | |
541c7d43 | 1101 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
d0e96f5a SS |
1102 | if (!in_interrupt()) |
1103 | xhci_dbg(xhci, "urb submitted during PCI suspend\n"); | |
1104 | ret = -ESHUTDOWN; | |
1105 | goto exit; | |
1106 | } | |
8e51adcc AX |
1107 | |
1108 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) | |
1109 | size = urb->number_of_packets; | |
1110 | else | |
1111 | size = 1; | |
1112 | ||
1113 | urb_priv = kzalloc(sizeof(struct urb_priv) + | |
1114 | size * sizeof(struct xhci_td *), mem_flags); | |
1115 | if (!urb_priv) | |
1116 | return -ENOMEM; | |
1117 | ||
2ffdea25 AX |
1118 | buffer = kzalloc(size * sizeof(struct xhci_td), mem_flags); |
1119 | if (!buffer) { | |
1120 | kfree(urb_priv); | |
1121 | return -ENOMEM; | |
1122 | } | |
1123 | ||
8e51adcc | 1124 | for (i = 0; i < size; i++) { |
2ffdea25 AX |
1125 | urb_priv->td[i] = buffer; |
1126 | buffer++; | |
8e51adcc AX |
1127 | } |
1128 | ||
1129 | urb_priv->length = size; | |
1130 | urb_priv->td_cnt = 0; | |
1131 | urb->hcpriv = urb_priv; | |
1132 | ||
2d3f1fac SS |
1133 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
1134 | /* Check to see if the max packet size for the default control | |
1135 | * endpoint changed during FS device enumeration | |
1136 | */ | |
1137 | if (urb->dev->speed == USB_SPEED_FULL) { | |
1138 | ret = xhci_check_maxpacket(xhci, slot_id, | |
1139 | ep_index, urb); | |
d13565c1 SS |
1140 | if (ret < 0) { |
1141 | xhci_urb_free_priv(xhci, urb_priv); | |
1142 | urb->hcpriv = NULL; | |
2d3f1fac | 1143 | return ret; |
d13565c1 | 1144 | } |
2d3f1fac SS |
1145 | } |
1146 | ||
b11069f5 SS |
1147 | /* We have a spinlock and interrupts disabled, so we must pass |
1148 | * atomic context to this function, which may allocate memory. | |
1149 | */ | |
2d3f1fac | 1150 | spin_lock_irqsave(&xhci->lock, flags); |
6f5165cf SS |
1151 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1152 | goto dying; | |
b11069f5 | 1153 | ret = xhci_queue_ctrl_tx(xhci, GFP_ATOMIC, urb, |
23e3be11 | 1154 | slot_id, ep_index); |
d13565c1 SS |
1155 | if (ret) |
1156 | goto free_priv; | |
2d3f1fac SS |
1157 | spin_unlock_irqrestore(&xhci->lock, flags); |
1158 | } else if (usb_endpoint_xfer_bulk(&urb->ep->desc)) { | |
1159 | spin_lock_irqsave(&xhci->lock, flags); | |
6f5165cf SS |
1160 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1161 | goto dying; | |
8df75f42 SS |
1162 | if (xhci->devs[slot_id]->eps[ep_index].ep_state & |
1163 | EP_GETTING_STREAMS) { | |
1164 | xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep " | |
1165 | "is transitioning to using streams.\n"); | |
1166 | ret = -EINVAL; | |
1167 | } else if (xhci->devs[slot_id]->eps[ep_index].ep_state & | |
1168 | EP_GETTING_NO_STREAMS) { | |
1169 | xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep " | |
1170 | "is transitioning to " | |
1171 | "not having streams.\n"); | |
1172 | ret = -EINVAL; | |
1173 | } else { | |
1174 | ret = xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb, | |
1175 | slot_id, ep_index); | |
1176 | } | |
d13565c1 SS |
1177 | if (ret) |
1178 | goto free_priv; | |
2d3f1fac | 1179 | spin_unlock_irqrestore(&xhci->lock, flags); |
624defa1 SS |
1180 | } else if (usb_endpoint_xfer_int(&urb->ep->desc)) { |
1181 | spin_lock_irqsave(&xhci->lock, flags); | |
6f5165cf SS |
1182 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1183 | goto dying; | |
624defa1 SS |
1184 | ret = xhci_queue_intr_tx(xhci, GFP_ATOMIC, urb, |
1185 | slot_id, ep_index); | |
d13565c1 SS |
1186 | if (ret) |
1187 | goto free_priv; | |
624defa1 | 1188 | spin_unlock_irqrestore(&xhci->lock, flags); |
2d3f1fac | 1189 | } else { |
787f4e5a AX |
1190 | spin_lock_irqsave(&xhci->lock, flags); |
1191 | if (xhci->xhc_state & XHCI_STATE_DYING) | |
1192 | goto dying; | |
1193 | ret = xhci_queue_isoc_tx_prepare(xhci, GFP_ATOMIC, urb, | |
1194 | slot_id, ep_index); | |
d13565c1 SS |
1195 | if (ret) |
1196 | goto free_priv; | |
787f4e5a | 1197 | spin_unlock_irqrestore(&xhci->lock, flags); |
2d3f1fac | 1198 | } |
d0e96f5a | 1199 | exit: |
d0e96f5a | 1200 | return ret; |
6f5165cf SS |
1201 | dying: |
1202 | xhci_dbg(xhci, "Ep 0x%x: URB %p submitted for " | |
1203 | "non-responsive xHCI host.\n", | |
1204 | urb->ep->desc.bEndpointAddress, urb); | |
d13565c1 SS |
1205 | ret = -ESHUTDOWN; |
1206 | free_priv: | |
1207 | xhci_urb_free_priv(xhci, urb_priv); | |
1208 | urb->hcpriv = NULL; | |
6f5165cf | 1209 | spin_unlock_irqrestore(&xhci->lock, flags); |
d13565c1 | 1210 | return ret; |
d0e96f5a SS |
1211 | } |
1212 | ||
021bff91 SS |
1213 | /* Get the right ring for the given URB. |
1214 | * If the endpoint supports streams, boundary check the URB's stream ID. | |
1215 | * If the endpoint doesn't support streams, return the singular endpoint ring. | |
1216 | */ | |
1217 | static struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci, | |
1218 | struct urb *urb) | |
1219 | { | |
1220 | unsigned int slot_id; | |
1221 | unsigned int ep_index; | |
1222 | unsigned int stream_id; | |
1223 | struct xhci_virt_ep *ep; | |
1224 | ||
1225 | slot_id = urb->dev->slot_id; | |
1226 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); | |
1227 | stream_id = urb->stream_id; | |
1228 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
1229 | /* Common case: no streams */ | |
1230 | if (!(ep->ep_state & EP_HAS_STREAMS)) | |
1231 | return ep->ring; | |
1232 | ||
1233 | if (stream_id == 0) { | |
1234 | xhci_warn(xhci, | |
1235 | "WARN: Slot ID %u, ep index %u has streams, " | |
1236 | "but URB has no stream ID.\n", | |
1237 | slot_id, ep_index); | |
1238 | return NULL; | |
1239 | } | |
1240 | ||
1241 | if (stream_id < ep->stream_info->num_streams) | |
1242 | return ep->stream_info->stream_rings[stream_id]; | |
1243 | ||
1244 | xhci_warn(xhci, | |
1245 | "WARN: Slot ID %u, ep index %u has " | |
1246 | "stream IDs 1 to %u allocated, " | |
1247 | "but stream ID %u is requested.\n", | |
1248 | slot_id, ep_index, | |
1249 | ep->stream_info->num_streams - 1, | |
1250 | stream_id); | |
1251 | return NULL; | |
1252 | } | |
1253 | ||
ae636747 SS |
1254 | /* |
1255 | * Remove the URB's TD from the endpoint ring. This may cause the HC to stop | |
1256 | * USB transfers, potentially stopping in the middle of a TRB buffer. The HC | |
1257 | * should pick up where it left off in the TD, unless a Set Transfer Ring | |
1258 | * Dequeue Pointer is issued. | |
1259 | * | |
1260 | * The TRBs that make up the buffers for the canceled URB will be "removed" from | |
1261 | * the ring. Since the ring is a contiguous structure, they can't be physically | |
1262 | * removed. Instead, there are two options: | |
1263 | * | |
1264 | * 1) If the HC is in the middle of processing the URB to be canceled, we | |
1265 | * simply move the ring's dequeue pointer past those TRBs using the Set | |
1266 | * Transfer Ring Dequeue Pointer command. This will be the common case, | |
1267 | * when drivers timeout on the last submitted URB and attempt to cancel. | |
1268 | * | |
1269 | * 2) If the HC is in the middle of a different TD, we turn the TRBs into a | |
1270 | * series of 1-TRB transfer no-op TDs. (No-ops shouldn't be chained.) The | |
1271 | * HC will need to invalidate the any TRBs it has cached after the stop | |
1272 | * endpoint command, as noted in the xHCI 0.95 errata. | |
1273 | * | |
1274 | * 3) The TD may have completed by the time the Stop Endpoint Command | |
1275 | * completes, so software needs to handle that case too. | |
1276 | * | |
1277 | * This function should protect against the TD enqueueing code ringing the | |
1278 | * doorbell while this code is waiting for a Stop Endpoint command to complete. | |
1279 | * It also needs to account for multiple cancellations on happening at the same | |
1280 | * time for the same endpoint. | |
1281 | * | |
1282 | * Note that this function can be called in any context, or so says | |
1283 | * usb_hcd_unlink_urb() | |
d0e96f5a SS |
1284 | */ |
1285 | int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
1286 | { | |
ae636747 | 1287 | unsigned long flags; |
8e51adcc | 1288 | int ret, i; |
e34b2fbf | 1289 | u32 temp; |
ae636747 | 1290 | struct xhci_hcd *xhci; |
8e51adcc | 1291 | struct urb_priv *urb_priv; |
ae636747 SS |
1292 | struct xhci_td *td; |
1293 | unsigned int ep_index; | |
1294 | struct xhci_ring *ep_ring; | |
63a0d9ab | 1295 | struct xhci_virt_ep *ep; |
ae636747 SS |
1296 | |
1297 | xhci = hcd_to_xhci(hcd); | |
1298 | spin_lock_irqsave(&xhci->lock, flags); | |
1299 | /* Make sure the URB hasn't completed or been unlinked already */ | |
1300 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); | |
1301 | if (ret || !urb->hcpriv) | |
1302 | goto done; | |
e34b2fbf | 1303 | temp = xhci_readl(xhci, &xhci->op_regs->status); |
c6cc27c7 | 1304 | if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_HALTED)) { |
e34b2fbf | 1305 | xhci_dbg(xhci, "HW died, freeing TD.\n"); |
8e51adcc | 1306 | urb_priv = urb->hcpriv; |
585df1d9 SS |
1307 | for (i = urb_priv->td_cnt; i < urb_priv->length; i++) { |
1308 | td = urb_priv->td[i]; | |
1309 | if (!list_empty(&td->td_list)) | |
1310 | list_del_init(&td->td_list); | |
1311 | if (!list_empty(&td->cancelled_td_list)) | |
1312 | list_del_init(&td->cancelled_td_list); | |
1313 | } | |
e34b2fbf SS |
1314 | |
1315 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
1316 | spin_unlock_irqrestore(&xhci->lock, flags); | |
214f76f7 | 1317 | usb_hcd_giveback_urb(hcd, urb, -ESHUTDOWN); |
8e51adcc | 1318 | xhci_urb_free_priv(xhci, urb_priv); |
e34b2fbf SS |
1319 | return ret; |
1320 | } | |
7bd89b40 SS |
1321 | if ((xhci->xhc_state & XHCI_STATE_DYING) || |
1322 | (xhci->xhc_state & XHCI_STATE_HALTED)) { | |
6f5165cf SS |
1323 | xhci_dbg(xhci, "Ep 0x%x: URB %p to be canceled on " |
1324 | "non-responsive xHCI host.\n", | |
1325 | urb->ep->desc.bEndpointAddress, urb); | |
1326 | /* Let the stop endpoint command watchdog timer (which set this | |
1327 | * state) finish cleaning up the endpoint TD lists. We must | |
1328 | * have caught it in the middle of dropping a lock and giving | |
1329 | * back an URB. | |
1330 | */ | |
1331 | goto done; | |
1332 | } | |
ae636747 | 1333 | |
700e2052 | 1334 | xhci_dbg(xhci, "Cancel URB %p\n", urb); |
66e49d87 SS |
1335 | xhci_dbg(xhci, "Event ring:\n"); |
1336 | xhci_debug_ring(xhci, xhci->event_ring); | |
ae636747 | 1337 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); |
63a0d9ab | 1338 | ep = &xhci->devs[urb->dev->slot_id]->eps[ep_index]; |
e9df17eb SS |
1339 | ep_ring = xhci_urb_to_transfer_ring(xhci, urb); |
1340 | if (!ep_ring) { | |
1341 | ret = -EINVAL; | |
1342 | goto done; | |
1343 | } | |
1344 | ||
66e49d87 SS |
1345 | xhci_dbg(xhci, "Endpoint ring:\n"); |
1346 | xhci_debug_ring(xhci, ep_ring); | |
ae636747 | 1347 | |
8e51adcc AX |
1348 | urb_priv = urb->hcpriv; |
1349 | ||
1350 | for (i = urb_priv->td_cnt; i < urb_priv->length; i++) { | |
1351 | td = urb_priv->td[i]; | |
1352 | list_add_tail(&td->cancelled_td_list, &ep->cancelled_td_list); | |
1353 | } | |
1354 | ||
ae636747 SS |
1355 | /* Queue a stop endpoint command, but only if this is |
1356 | * the first cancellation to be handled. | |
1357 | */ | |
678539cf SS |
1358 | if (!(ep->ep_state & EP_HALT_PENDING)) { |
1359 | ep->ep_state |= EP_HALT_PENDING; | |
6f5165cf SS |
1360 | ep->stop_cmds_pending++; |
1361 | ep->stop_cmd_timer.expires = jiffies + | |
1362 | XHCI_STOP_EP_CMD_TIMEOUT * HZ; | |
1363 | add_timer(&ep->stop_cmd_timer); | |
be88fe4f | 1364 | xhci_queue_stop_endpoint(xhci, urb->dev->slot_id, ep_index, 0); |
23e3be11 | 1365 | xhci_ring_cmd_db(xhci); |
ae636747 SS |
1366 | } |
1367 | done: | |
1368 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1369 | return ret; | |
d0e96f5a SS |
1370 | } |
1371 | ||
f94e0186 SS |
1372 | /* Drop an endpoint from a new bandwidth configuration for this device. |
1373 | * Only one call to this function is allowed per endpoint before | |
1374 | * check_bandwidth() or reset_bandwidth() must be called. | |
1375 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will | |
1376 | * add the endpoint to the schedule with possibly new parameters denoted by a | |
1377 | * different endpoint descriptor in usb_host_endpoint. | |
1378 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is | |
1379 | * not allowed. | |
f88ba78d SS |
1380 | * |
1381 | * The USB core will not allow URBs to be queued to an endpoint that is being | |
1382 | * disabled, so there's no need for mutual exclusion to protect | |
1383 | * the xhci->devs[slot_id] structure. | |
f94e0186 SS |
1384 | */ |
1385 | int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, | |
1386 | struct usb_host_endpoint *ep) | |
1387 | { | |
f94e0186 | 1388 | struct xhci_hcd *xhci; |
d115b048 JY |
1389 | struct xhci_container_ctx *in_ctx, *out_ctx; |
1390 | struct xhci_input_control_ctx *ctrl_ctx; | |
1391 | struct xhci_slot_ctx *slot_ctx; | |
f94e0186 SS |
1392 | unsigned int last_ctx; |
1393 | unsigned int ep_index; | |
1394 | struct xhci_ep_ctx *ep_ctx; | |
1395 | u32 drop_flag; | |
1396 | u32 new_add_flags, new_drop_flags, new_slot_info; | |
1397 | int ret; | |
1398 | ||
64927730 | 1399 | ret = xhci_check_args(hcd, udev, ep, 1, true, __func__); |
f94e0186 SS |
1400 | if (ret <= 0) |
1401 | return ret; | |
1402 | xhci = hcd_to_xhci(hcd); | |
fe6c6c13 SS |
1403 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1404 | return -ENODEV; | |
f94e0186 | 1405 | |
fe6c6c13 | 1406 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
1407 | drop_flag = xhci_get_endpoint_flag(&ep->desc); |
1408 | if (drop_flag == SLOT_FLAG || drop_flag == EP0_FLAG) { | |
1409 | xhci_dbg(xhci, "xHCI %s - can't drop slot or ep 0 %#x\n", | |
1410 | __func__, drop_flag); | |
1411 | return 0; | |
1412 | } | |
1413 | ||
f94e0186 | 1414 | in_ctx = xhci->devs[udev->slot_id]->in_ctx; |
d115b048 JY |
1415 | out_ctx = xhci->devs[udev->slot_id]->out_ctx; |
1416 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
f94e0186 | 1417 | ep_index = xhci_get_endpoint_index(&ep->desc); |
d115b048 | 1418 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
f94e0186 SS |
1419 | /* If the HC already knows the endpoint is disabled, |
1420 | * or the HCD has noted it is disabled, ignore this request | |
1421 | */ | |
f5960b69 ME |
1422 | if (((ep_ctx->ep_info & cpu_to_le32(EP_STATE_MASK)) == |
1423 | cpu_to_le32(EP_STATE_DISABLED)) || | |
28ccd296 ME |
1424 | le32_to_cpu(ctrl_ctx->drop_flags) & |
1425 | xhci_get_endpoint_flag(&ep->desc)) { | |
700e2052 GKH |
1426 | xhci_warn(xhci, "xHCI %s called with disabled ep %p\n", |
1427 | __func__, ep); | |
f94e0186 SS |
1428 | return 0; |
1429 | } | |
1430 | ||
28ccd296 ME |
1431 | ctrl_ctx->drop_flags |= cpu_to_le32(drop_flag); |
1432 | new_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags); | |
f94e0186 | 1433 | |
28ccd296 ME |
1434 | ctrl_ctx->add_flags &= cpu_to_le32(~drop_flag); |
1435 | new_add_flags = le32_to_cpu(ctrl_ctx->add_flags); | |
f94e0186 | 1436 | |
28ccd296 | 1437 | last_ctx = xhci_last_valid_endpoint(le32_to_cpu(ctrl_ctx->add_flags)); |
d115b048 | 1438 | slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); |
f94e0186 | 1439 | /* Update the last valid endpoint context, if we deleted the last one */ |
28ccd296 ME |
1440 | if ((le32_to_cpu(slot_ctx->dev_info) & LAST_CTX_MASK) > |
1441 | LAST_CTX(last_ctx)) { | |
1442 | slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); | |
1443 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(last_ctx)); | |
f94e0186 | 1444 | } |
28ccd296 | 1445 | new_slot_info = le32_to_cpu(slot_ctx->dev_info); |
f94e0186 SS |
1446 | |
1447 | xhci_endpoint_zero(xhci, xhci->devs[udev->slot_id], ep); | |
1448 | ||
f94e0186 SS |
1449 | xhci_dbg(xhci, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", |
1450 | (unsigned int) ep->desc.bEndpointAddress, | |
1451 | udev->slot_id, | |
1452 | (unsigned int) new_drop_flags, | |
1453 | (unsigned int) new_add_flags, | |
1454 | (unsigned int) new_slot_info); | |
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | /* Add an endpoint to a new possible bandwidth configuration for this device. | |
1459 | * Only one call to this function is allowed per endpoint before | |
1460 | * check_bandwidth() or reset_bandwidth() must be called. | |
1461 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will | |
1462 | * add the endpoint to the schedule with possibly new parameters denoted by a | |
1463 | * different endpoint descriptor in usb_host_endpoint. | |
1464 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is | |
1465 | * not allowed. | |
f88ba78d SS |
1466 | * |
1467 | * The USB core will not allow URBs to be queued to an endpoint until the | |
1468 | * configuration or alt setting is installed in the device, so there's no need | |
1469 | * for mutual exclusion to protect the xhci->devs[slot_id] structure. | |
f94e0186 SS |
1470 | */ |
1471 | int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, | |
1472 | struct usb_host_endpoint *ep) | |
1473 | { | |
f94e0186 | 1474 | struct xhci_hcd *xhci; |
d115b048 | 1475 | struct xhci_container_ctx *in_ctx, *out_ctx; |
f94e0186 SS |
1476 | unsigned int ep_index; |
1477 | struct xhci_ep_ctx *ep_ctx; | |
d115b048 JY |
1478 | struct xhci_slot_ctx *slot_ctx; |
1479 | struct xhci_input_control_ctx *ctrl_ctx; | |
f94e0186 SS |
1480 | u32 added_ctxs; |
1481 | unsigned int last_ctx; | |
1482 | u32 new_add_flags, new_drop_flags, new_slot_info; | |
fa75ac37 | 1483 | struct xhci_virt_device *virt_dev; |
f94e0186 SS |
1484 | int ret = 0; |
1485 | ||
64927730 | 1486 | ret = xhci_check_args(hcd, udev, ep, 1, true, __func__); |
a1587d97 SS |
1487 | if (ret <= 0) { |
1488 | /* So we won't queue a reset ep command for a root hub */ | |
1489 | ep->hcpriv = NULL; | |
f94e0186 | 1490 | return ret; |
a1587d97 | 1491 | } |
f94e0186 | 1492 | xhci = hcd_to_xhci(hcd); |
fe6c6c13 SS |
1493 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1494 | return -ENODEV; | |
f94e0186 SS |
1495 | |
1496 | added_ctxs = xhci_get_endpoint_flag(&ep->desc); | |
1497 | last_ctx = xhci_last_valid_endpoint(added_ctxs); | |
1498 | if (added_ctxs == SLOT_FLAG || added_ctxs == EP0_FLAG) { | |
1499 | /* FIXME when we have to issue an evaluate endpoint command to | |
1500 | * deal with ep0 max packet size changing once we get the | |
1501 | * descriptors | |
1502 | */ | |
1503 | xhci_dbg(xhci, "xHCI %s - can't add slot or ep 0 %#x\n", | |
1504 | __func__, added_ctxs); | |
1505 | return 0; | |
1506 | } | |
1507 | ||
fa75ac37 SS |
1508 | virt_dev = xhci->devs[udev->slot_id]; |
1509 | in_ctx = virt_dev->in_ctx; | |
1510 | out_ctx = virt_dev->out_ctx; | |
d115b048 | 1511 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); |
f94e0186 | 1512 | ep_index = xhci_get_endpoint_index(&ep->desc); |
d115b048 | 1513 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
fa75ac37 SS |
1514 | |
1515 | /* If this endpoint is already in use, and the upper layers are trying | |
1516 | * to add it again without dropping it, reject the addition. | |
1517 | */ | |
1518 | if (virt_dev->eps[ep_index].ring && | |
1519 | !(le32_to_cpu(ctrl_ctx->drop_flags) & | |
1520 | xhci_get_endpoint_flag(&ep->desc))) { | |
1521 | xhci_warn(xhci, "Trying to add endpoint 0x%x " | |
1522 | "without dropping it.\n", | |
1523 | (unsigned int) ep->desc.bEndpointAddress); | |
1524 | return -EINVAL; | |
1525 | } | |
1526 | ||
f94e0186 SS |
1527 | /* If the HCD has already noted the endpoint is enabled, |
1528 | * ignore this request. | |
1529 | */ | |
28ccd296 ME |
1530 | if (le32_to_cpu(ctrl_ctx->add_flags) & |
1531 | xhci_get_endpoint_flag(&ep->desc)) { | |
700e2052 GKH |
1532 | xhci_warn(xhci, "xHCI %s called with enabled ep %p\n", |
1533 | __func__, ep); | |
f94e0186 SS |
1534 | return 0; |
1535 | } | |
1536 | ||
f88ba78d SS |
1537 | /* |
1538 | * Configuration and alternate setting changes must be done in | |
1539 | * process context, not interrupt context (or so documenation | |
1540 | * for usb_set_interface() and usb_set_configuration() claim). | |
1541 | */ | |
fa75ac37 | 1542 | if (xhci_endpoint_init(xhci, virt_dev, udev, ep, GFP_NOIO) < 0) { |
f94e0186 SS |
1543 | dev_dbg(&udev->dev, "%s - could not initialize ep %#x\n", |
1544 | __func__, ep->desc.bEndpointAddress); | |
f94e0186 SS |
1545 | return -ENOMEM; |
1546 | } | |
1547 | ||
28ccd296 ME |
1548 | ctrl_ctx->add_flags |= cpu_to_le32(added_ctxs); |
1549 | new_add_flags = le32_to_cpu(ctrl_ctx->add_flags); | |
f94e0186 SS |
1550 | |
1551 | /* If xhci_endpoint_disable() was called for this endpoint, but the | |
1552 | * xHC hasn't been notified yet through the check_bandwidth() call, | |
1553 | * this re-adds a new state for the endpoint from the new endpoint | |
1554 | * descriptors. We must drop and re-add this endpoint, so we leave the | |
1555 | * drop flags alone. | |
1556 | */ | |
28ccd296 | 1557 | new_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags); |
f94e0186 | 1558 | |
d115b048 | 1559 | slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); |
f94e0186 | 1560 | /* Update the last valid endpoint context, if we just added one past */ |
28ccd296 ME |
1561 | if ((le32_to_cpu(slot_ctx->dev_info) & LAST_CTX_MASK) < |
1562 | LAST_CTX(last_ctx)) { | |
1563 | slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); | |
1564 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(last_ctx)); | |
f94e0186 | 1565 | } |
28ccd296 | 1566 | new_slot_info = le32_to_cpu(slot_ctx->dev_info); |
f94e0186 | 1567 | |
a1587d97 SS |
1568 | /* Store the usb_device pointer for later use */ |
1569 | ep->hcpriv = udev; | |
1570 | ||
f94e0186 SS |
1571 | xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", |
1572 | (unsigned int) ep->desc.bEndpointAddress, | |
1573 | udev->slot_id, | |
1574 | (unsigned int) new_drop_flags, | |
1575 | (unsigned int) new_add_flags, | |
1576 | (unsigned int) new_slot_info); | |
1577 | return 0; | |
1578 | } | |
1579 | ||
d115b048 | 1580 | static void xhci_zero_in_ctx(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev) |
f94e0186 | 1581 | { |
d115b048 | 1582 | struct xhci_input_control_ctx *ctrl_ctx; |
f94e0186 | 1583 | struct xhci_ep_ctx *ep_ctx; |
d115b048 | 1584 | struct xhci_slot_ctx *slot_ctx; |
f94e0186 SS |
1585 | int i; |
1586 | ||
1587 | /* When a device's add flag and drop flag are zero, any subsequent | |
1588 | * configure endpoint command will leave that endpoint's state | |
1589 | * untouched. Make sure we don't leave any old state in the input | |
1590 | * endpoint contexts. | |
1591 | */ | |
d115b048 JY |
1592 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
1593 | ctrl_ctx->drop_flags = 0; | |
1594 | ctrl_ctx->add_flags = 0; | |
1595 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); | |
28ccd296 | 1596 | slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); |
f94e0186 | 1597 | /* Endpoint 0 is always valid */ |
28ccd296 | 1598 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1)); |
f94e0186 | 1599 | for (i = 1; i < 31; ++i) { |
d115b048 | 1600 | ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, i); |
f94e0186 SS |
1601 | ep_ctx->ep_info = 0; |
1602 | ep_ctx->ep_info2 = 0; | |
8e595a5d | 1603 | ep_ctx->deq = 0; |
f94e0186 SS |
1604 | ep_ctx->tx_info = 0; |
1605 | } | |
1606 | } | |
1607 | ||
f2217e8e | 1608 | static int xhci_configure_endpoint_result(struct xhci_hcd *xhci, |
00161f7d | 1609 | struct usb_device *udev, u32 *cmd_status) |
f2217e8e SS |
1610 | { |
1611 | int ret; | |
1612 | ||
913a8a34 | 1613 | switch (*cmd_status) { |
f2217e8e SS |
1614 | case COMP_ENOMEM: |
1615 | dev_warn(&udev->dev, "Not enough host controller resources " | |
1616 | "for new device state.\n"); | |
1617 | ret = -ENOMEM; | |
1618 | /* FIXME: can we allocate more resources for the HC? */ | |
1619 | break; | |
1620 | case COMP_BW_ERR: | |
1621 | dev_warn(&udev->dev, "Not enough bandwidth " | |
1622 | "for new device state.\n"); | |
1623 | ret = -ENOSPC; | |
1624 | /* FIXME: can we go back to the old state? */ | |
1625 | break; | |
1626 | case COMP_TRB_ERR: | |
1627 | /* the HCD set up something wrong */ | |
1628 | dev_warn(&udev->dev, "ERROR: Endpoint drop flag = 0, " | |
1629 | "add flag = 1, " | |
1630 | "and endpoint is not disabled.\n"); | |
1631 | ret = -EINVAL; | |
1632 | break; | |
f6ba6fe2 AH |
1633 | case COMP_DEV_ERR: |
1634 | dev_warn(&udev->dev, "ERROR: Incompatible device for endpoint " | |
1635 | "configure command.\n"); | |
1636 | ret = -ENODEV; | |
1637 | break; | |
f2217e8e SS |
1638 | case COMP_SUCCESS: |
1639 | dev_dbg(&udev->dev, "Successful Endpoint Configure command\n"); | |
1640 | ret = 0; | |
1641 | break; | |
1642 | default: | |
1643 | xhci_err(xhci, "ERROR: unexpected command completion " | |
913a8a34 | 1644 | "code 0x%x.\n", *cmd_status); |
f2217e8e SS |
1645 | ret = -EINVAL; |
1646 | break; | |
1647 | } | |
1648 | return ret; | |
1649 | } | |
1650 | ||
1651 | static int xhci_evaluate_context_result(struct xhci_hcd *xhci, | |
00161f7d | 1652 | struct usb_device *udev, u32 *cmd_status) |
f2217e8e SS |
1653 | { |
1654 | int ret; | |
913a8a34 | 1655 | struct xhci_virt_device *virt_dev = xhci->devs[udev->slot_id]; |
f2217e8e | 1656 | |
913a8a34 | 1657 | switch (*cmd_status) { |
f2217e8e SS |
1658 | case COMP_EINVAL: |
1659 | dev_warn(&udev->dev, "WARN: xHCI driver setup invalid evaluate " | |
1660 | "context command.\n"); | |
1661 | ret = -EINVAL; | |
1662 | break; | |
1663 | case COMP_EBADSLT: | |
1664 | dev_warn(&udev->dev, "WARN: slot not enabled for" | |
1665 | "evaluate context command.\n"); | |
1666 | case COMP_CTX_STATE: | |
1667 | dev_warn(&udev->dev, "WARN: invalid context state for " | |
1668 | "evaluate context command.\n"); | |
1669 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 1); | |
1670 | ret = -EINVAL; | |
1671 | break; | |
f6ba6fe2 AH |
1672 | case COMP_DEV_ERR: |
1673 | dev_warn(&udev->dev, "ERROR: Incompatible device for evaluate " | |
1674 | "context command.\n"); | |
1675 | ret = -ENODEV; | |
1676 | break; | |
1bb73a88 AH |
1677 | case COMP_MEL_ERR: |
1678 | /* Max Exit Latency too large error */ | |
1679 | dev_warn(&udev->dev, "WARN: Max Exit Latency too large\n"); | |
1680 | ret = -EINVAL; | |
1681 | break; | |
f2217e8e SS |
1682 | case COMP_SUCCESS: |
1683 | dev_dbg(&udev->dev, "Successful evaluate context command\n"); | |
1684 | ret = 0; | |
1685 | break; | |
1686 | default: | |
1687 | xhci_err(xhci, "ERROR: unexpected command completion " | |
913a8a34 | 1688 | "code 0x%x.\n", *cmd_status); |
f2217e8e SS |
1689 | ret = -EINVAL; |
1690 | break; | |
1691 | } | |
1692 | return ret; | |
1693 | } | |
1694 | ||
2cf95c18 SS |
1695 | static u32 xhci_count_num_new_endpoints(struct xhci_hcd *xhci, |
1696 | struct xhci_container_ctx *in_ctx) | |
1697 | { | |
1698 | struct xhci_input_control_ctx *ctrl_ctx; | |
1699 | u32 valid_add_flags; | |
1700 | u32 valid_drop_flags; | |
1701 | ||
1702 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
1703 | /* Ignore the slot flag (bit 0), and the default control endpoint flag | |
1704 | * (bit 1). The default control endpoint is added during the Address | |
1705 | * Device command and is never removed until the slot is disabled. | |
1706 | */ | |
1707 | valid_add_flags = ctrl_ctx->add_flags >> 2; | |
1708 | valid_drop_flags = ctrl_ctx->drop_flags >> 2; | |
1709 | ||
1710 | /* Use hweight32 to count the number of ones in the add flags, or | |
1711 | * number of endpoints added. Don't count endpoints that are changed | |
1712 | * (both added and dropped). | |
1713 | */ | |
1714 | return hweight32(valid_add_flags) - | |
1715 | hweight32(valid_add_flags & valid_drop_flags); | |
1716 | } | |
1717 | ||
1718 | static unsigned int xhci_count_num_dropped_endpoints(struct xhci_hcd *xhci, | |
1719 | struct xhci_container_ctx *in_ctx) | |
1720 | { | |
1721 | struct xhci_input_control_ctx *ctrl_ctx; | |
1722 | u32 valid_add_flags; | |
1723 | u32 valid_drop_flags; | |
1724 | ||
1725 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
1726 | valid_add_flags = ctrl_ctx->add_flags >> 2; | |
1727 | valid_drop_flags = ctrl_ctx->drop_flags >> 2; | |
1728 | ||
1729 | return hweight32(valid_drop_flags) - | |
1730 | hweight32(valid_add_flags & valid_drop_flags); | |
1731 | } | |
1732 | ||
1733 | /* | |
1734 | * We need to reserve the new number of endpoints before the configure endpoint | |
1735 | * command completes. We can't subtract the dropped endpoints from the number | |
1736 | * of active endpoints until the command completes because we can oversubscribe | |
1737 | * the host in this case: | |
1738 | * | |
1739 | * - the first configure endpoint command drops more endpoints than it adds | |
1740 | * - a second configure endpoint command that adds more endpoints is queued | |
1741 | * - the first configure endpoint command fails, so the config is unchanged | |
1742 | * - the second command may succeed, even though there isn't enough resources | |
1743 | * | |
1744 | * Must be called with xhci->lock held. | |
1745 | */ | |
1746 | static int xhci_reserve_host_resources(struct xhci_hcd *xhci, | |
1747 | struct xhci_container_ctx *in_ctx) | |
1748 | { | |
1749 | u32 added_eps; | |
1750 | ||
1751 | added_eps = xhci_count_num_new_endpoints(xhci, in_ctx); | |
1752 | if (xhci->num_active_eps + added_eps > xhci->limit_active_eps) { | |
1753 | xhci_dbg(xhci, "Not enough ep ctxs: " | |
1754 | "%u active, need to add %u, limit is %u.\n", | |
1755 | xhci->num_active_eps, added_eps, | |
1756 | xhci->limit_active_eps); | |
1757 | return -ENOMEM; | |
1758 | } | |
1759 | xhci->num_active_eps += added_eps; | |
1760 | xhci_dbg(xhci, "Adding %u ep ctxs, %u now active.\n", added_eps, | |
1761 | xhci->num_active_eps); | |
1762 | return 0; | |
1763 | } | |
1764 | ||
1765 | /* | |
1766 | * The configure endpoint was failed by the xHC for some other reason, so we | |
1767 | * need to revert the resources that failed configuration would have used. | |
1768 | * | |
1769 | * Must be called with xhci->lock held. | |
1770 | */ | |
1771 | static void xhci_free_host_resources(struct xhci_hcd *xhci, | |
1772 | struct xhci_container_ctx *in_ctx) | |
1773 | { | |
1774 | u32 num_failed_eps; | |
1775 | ||
1776 | num_failed_eps = xhci_count_num_new_endpoints(xhci, in_ctx); | |
1777 | xhci->num_active_eps -= num_failed_eps; | |
1778 | xhci_dbg(xhci, "Removing %u failed ep ctxs, %u now active.\n", | |
1779 | num_failed_eps, | |
1780 | xhci->num_active_eps); | |
1781 | } | |
1782 | ||
1783 | /* | |
1784 | * Now that the command has completed, clean up the active endpoint count by | |
1785 | * subtracting out the endpoints that were dropped (but not changed). | |
1786 | * | |
1787 | * Must be called with xhci->lock held. | |
1788 | */ | |
1789 | static void xhci_finish_resource_reservation(struct xhci_hcd *xhci, | |
1790 | struct xhci_container_ctx *in_ctx) | |
1791 | { | |
1792 | u32 num_dropped_eps; | |
1793 | ||
1794 | num_dropped_eps = xhci_count_num_dropped_endpoints(xhci, in_ctx); | |
1795 | xhci->num_active_eps -= num_dropped_eps; | |
1796 | if (num_dropped_eps) | |
1797 | xhci_dbg(xhci, "Removing %u dropped ep ctxs, %u now active.\n", | |
1798 | num_dropped_eps, | |
1799 | xhci->num_active_eps); | |
1800 | } | |
1801 | ||
c29eea62 SS |
1802 | unsigned int xhci_get_block_size(struct usb_device *udev) |
1803 | { | |
1804 | switch (udev->speed) { | |
1805 | case USB_SPEED_LOW: | |
1806 | case USB_SPEED_FULL: | |
1807 | return FS_BLOCK; | |
1808 | case USB_SPEED_HIGH: | |
1809 | return HS_BLOCK; | |
1810 | case USB_SPEED_SUPER: | |
1811 | return SS_BLOCK; | |
1812 | case USB_SPEED_UNKNOWN: | |
1813 | case USB_SPEED_WIRELESS: | |
1814 | default: | |
1815 | /* Should never happen */ | |
1816 | return 1; | |
1817 | } | |
1818 | } | |
1819 | ||
1820 | unsigned int xhci_get_largest_overhead(struct xhci_interval_bw *interval_bw) | |
1821 | { | |
1822 | if (interval_bw->overhead[LS_OVERHEAD_TYPE]) | |
1823 | return LS_OVERHEAD; | |
1824 | if (interval_bw->overhead[FS_OVERHEAD_TYPE]) | |
1825 | return FS_OVERHEAD; | |
1826 | return HS_OVERHEAD; | |
1827 | } | |
1828 | ||
1829 | /* If we are changing a LS/FS device under a HS hub, | |
1830 | * make sure (if we are activating a new TT) that the HS bus has enough | |
1831 | * bandwidth for this new TT. | |
1832 | */ | |
1833 | static int xhci_check_tt_bw_table(struct xhci_hcd *xhci, | |
1834 | struct xhci_virt_device *virt_dev, | |
1835 | int old_active_eps) | |
1836 | { | |
1837 | struct xhci_interval_bw_table *bw_table; | |
1838 | struct xhci_tt_bw_info *tt_info; | |
1839 | ||
1840 | /* Find the bandwidth table for the root port this TT is attached to. */ | |
1841 | bw_table = &xhci->rh_bw[virt_dev->real_port - 1].bw_table; | |
1842 | tt_info = virt_dev->tt_info; | |
1843 | /* If this TT already had active endpoints, the bandwidth for this TT | |
1844 | * has already been added. Removing all periodic endpoints (and thus | |
1845 | * making the TT enactive) will only decrease the bandwidth used. | |
1846 | */ | |
1847 | if (old_active_eps) | |
1848 | return 0; | |
1849 | if (old_active_eps == 0 && tt_info->active_eps != 0) { | |
1850 | if (bw_table->bw_used + TT_HS_OVERHEAD > HS_BW_LIMIT) | |
1851 | return -ENOMEM; | |
1852 | return 0; | |
1853 | } | |
1854 | /* Not sure why we would have no new active endpoints... | |
1855 | * | |
1856 | * Maybe because of an Evaluate Context change for a hub update or a | |
1857 | * control endpoint 0 max packet size change? | |
1858 | * FIXME: skip the bandwidth calculation in that case. | |
1859 | */ | |
1860 | return 0; | |
1861 | } | |
1862 | ||
2b698999 SS |
1863 | static int xhci_check_ss_bw(struct xhci_hcd *xhci, |
1864 | struct xhci_virt_device *virt_dev) | |
1865 | { | |
1866 | unsigned int bw_reserved; | |
1867 | ||
1868 | bw_reserved = DIV_ROUND_UP(SS_BW_RESERVED*SS_BW_LIMIT_IN, 100); | |
1869 | if (virt_dev->bw_table->ss_bw_in > (SS_BW_LIMIT_IN - bw_reserved)) | |
1870 | return -ENOMEM; | |
1871 | ||
1872 | bw_reserved = DIV_ROUND_UP(SS_BW_RESERVED*SS_BW_LIMIT_OUT, 100); | |
1873 | if (virt_dev->bw_table->ss_bw_out > (SS_BW_LIMIT_OUT - bw_reserved)) | |
1874 | return -ENOMEM; | |
1875 | ||
1876 | return 0; | |
1877 | } | |
1878 | ||
c29eea62 SS |
1879 | /* |
1880 | * This algorithm is a very conservative estimate of the worst-case scheduling | |
1881 | * scenario for any one interval. The hardware dynamically schedules the | |
1882 | * packets, so we can't tell which microframe could be the limiting factor in | |
1883 | * the bandwidth scheduling. This only takes into account periodic endpoints. | |
1884 | * | |
1885 | * Obviously, we can't solve an NP complete problem to find the minimum worst | |
1886 | * case scenario. Instead, we come up with an estimate that is no less than | |
1887 | * the worst case bandwidth used for any one microframe, but may be an | |
1888 | * over-estimate. | |
1889 | * | |
1890 | * We walk the requirements for each endpoint by interval, starting with the | |
1891 | * smallest interval, and place packets in the schedule where there is only one | |
1892 | * possible way to schedule packets for that interval. In order to simplify | |
1893 | * this algorithm, we record the largest max packet size for each interval, and | |
1894 | * assume all packets will be that size. | |
1895 | * | |
1896 | * For interval 0, we obviously must schedule all packets for each interval. | |
1897 | * The bandwidth for interval 0 is just the amount of data to be transmitted | |
1898 | * (the sum of all max ESIT payload sizes, plus any overhead per packet times | |
1899 | * the number of packets). | |
1900 | * | |
1901 | * For interval 1, we have two possible microframes to schedule those packets | |
1902 | * in. For this algorithm, if we can schedule the same number of packets for | |
1903 | * each possible scheduling opportunity (each microframe), we will do so. The | |
1904 | * remaining number of packets will be saved to be transmitted in the gaps in | |
1905 | * the next interval's scheduling sequence. | |
1906 | * | |
1907 | * As we move those remaining packets to be scheduled with interval 2 packets, | |
1908 | * we have to double the number of remaining packets to transmit. This is | |
1909 | * because the intervals are actually powers of 2, and we would be transmitting | |
1910 | * the previous interval's packets twice in this interval. We also have to be | |
1911 | * sure that when we look at the largest max packet size for this interval, we | |
1912 | * also look at the largest max packet size for the remaining packets and take | |
1913 | * the greater of the two. | |
1914 | * | |
1915 | * The algorithm continues to evenly distribute packets in each scheduling | |
1916 | * opportunity, and push the remaining packets out, until we get to the last | |
1917 | * interval. Then those packets and their associated overhead are just added | |
1918 | * to the bandwidth used. | |
2e27980e SS |
1919 | */ |
1920 | static int xhci_check_bw_table(struct xhci_hcd *xhci, | |
1921 | struct xhci_virt_device *virt_dev, | |
1922 | int old_active_eps) | |
1923 | { | |
c29eea62 SS |
1924 | unsigned int bw_reserved; |
1925 | unsigned int max_bandwidth; | |
1926 | unsigned int bw_used; | |
1927 | unsigned int block_size; | |
1928 | struct xhci_interval_bw_table *bw_table; | |
1929 | unsigned int packet_size = 0; | |
1930 | unsigned int overhead = 0; | |
1931 | unsigned int packets_transmitted = 0; | |
1932 | unsigned int packets_remaining = 0; | |
1933 | unsigned int i; | |
1934 | ||
2b698999 SS |
1935 | if (virt_dev->udev->speed == USB_SPEED_SUPER) |
1936 | return xhci_check_ss_bw(xhci, virt_dev); | |
1937 | ||
c29eea62 SS |
1938 | if (virt_dev->udev->speed == USB_SPEED_HIGH) { |
1939 | max_bandwidth = HS_BW_LIMIT; | |
1940 | /* Convert percent of bus BW reserved to blocks reserved */ | |
1941 | bw_reserved = DIV_ROUND_UP(HS_BW_RESERVED * max_bandwidth, 100); | |
1942 | } else { | |
1943 | max_bandwidth = FS_BW_LIMIT; | |
1944 | bw_reserved = DIV_ROUND_UP(FS_BW_RESERVED * max_bandwidth, 100); | |
1945 | } | |
1946 | ||
1947 | bw_table = virt_dev->bw_table; | |
1948 | /* We need to translate the max packet size and max ESIT payloads into | |
1949 | * the units the hardware uses. | |
1950 | */ | |
1951 | block_size = xhci_get_block_size(virt_dev->udev); | |
1952 | ||
1953 | /* If we are manipulating a LS/FS device under a HS hub, double check | |
1954 | * that the HS bus has enough bandwidth if we are activing a new TT. | |
1955 | */ | |
1956 | if (virt_dev->tt_info) { | |
1957 | xhci_dbg(xhci, "Recalculating BW for rootport %u\n", | |
1958 | virt_dev->real_port); | |
1959 | if (xhci_check_tt_bw_table(xhci, virt_dev, old_active_eps)) { | |
1960 | xhci_warn(xhci, "Not enough bandwidth on HS bus for " | |
1961 | "newly activated TT.\n"); | |
1962 | return -ENOMEM; | |
1963 | } | |
1964 | xhci_dbg(xhci, "Recalculating BW for TT slot %u port %u\n", | |
1965 | virt_dev->tt_info->slot_id, | |
1966 | virt_dev->tt_info->ttport); | |
1967 | } else { | |
1968 | xhci_dbg(xhci, "Recalculating BW for rootport %u\n", | |
1969 | virt_dev->real_port); | |
1970 | } | |
1971 | ||
1972 | /* Add in how much bandwidth will be used for interval zero, or the | |
1973 | * rounded max ESIT payload + number of packets * largest overhead. | |
1974 | */ | |
1975 | bw_used = DIV_ROUND_UP(bw_table->interval0_esit_payload, block_size) + | |
1976 | bw_table->interval_bw[0].num_packets * | |
1977 | xhci_get_largest_overhead(&bw_table->interval_bw[0]); | |
1978 | ||
1979 | for (i = 1; i < XHCI_MAX_INTERVAL; i++) { | |
1980 | unsigned int bw_added; | |
1981 | unsigned int largest_mps; | |
1982 | unsigned int interval_overhead; | |
1983 | ||
1984 | /* | |
1985 | * How many packets could we transmit in this interval? | |
1986 | * If packets didn't fit in the previous interval, we will need | |
1987 | * to transmit that many packets twice within this interval. | |
1988 | */ | |
1989 | packets_remaining = 2 * packets_remaining + | |
1990 | bw_table->interval_bw[i].num_packets; | |
1991 | ||
1992 | /* Find the largest max packet size of this or the previous | |
1993 | * interval. | |
1994 | */ | |
1995 | if (list_empty(&bw_table->interval_bw[i].endpoints)) | |
1996 | largest_mps = 0; | |
1997 | else { | |
1998 | struct xhci_virt_ep *virt_ep; | |
1999 | struct list_head *ep_entry; | |
2000 | ||
2001 | ep_entry = bw_table->interval_bw[i].endpoints.next; | |
2002 | virt_ep = list_entry(ep_entry, | |
2003 | struct xhci_virt_ep, bw_endpoint_list); | |
2004 | /* Convert to blocks, rounding up */ | |
2005 | largest_mps = DIV_ROUND_UP( | |
2006 | virt_ep->bw_info.max_packet_size, | |
2007 | block_size); | |
2008 | } | |
2009 | if (largest_mps > packet_size) | |
2010 | packet_size = largest_mps; | |
2011 | ||
2012 | /* Use the larger overhead of this or the previous interval. */ | |
2013 | interval_overhead = xhci_get_largest_overhead( | |
2014 | &bw_table->interval_bw[i]); | |
2015 | if (interval_overhead > overhead) | |
2016 | overhead = interval_overhead; | |
2017 | ||
2018 | /* How many packets can we evenly distribute across | |
2019 | * (1 << (i + 1)) possible scheduling opportunities? | |
2020 | */ | |
2021 | packets_transmitted = packets_remaining >> (i + 1); | |
2022 | ||
2023 | /* Add in the bandwidth used for those scheduled packets */ | |
2024 | bw_added = packets_transmitted * (overhead + packet_size); | |
2025 | ||
2026 | /* How many packets do we have remaining to transmit? */ | |
2027 | packets_remaining = packets_remaining % (1 << (i + 1)); | |
2028 | ||
2029 | /* What largest max packet size should those packets have? */ | |
2030 | /* If we've transmitted all packets, don't carry over the | |
2031 | * largest packet size. | |
2032 | */ | |
2033 | if (packets_remaining == 0) { | |
2034 | packet_size = 0; | |
2035 | overhead = 0; | |
2036 | } else if (packets_transmitted > 0) { | |
2037 | /* Otherwise if we do have remaining packets, and we've | |
2038 | * scheduled some packets in this interval, take the | |
2039 | * largest max packet size from endpoints with this | |
2040 | * interval. | |
2041 | */ | |
2042 | packet_size = largest_mps; | |
2043 | overhead = interval_overhead; | |
2044 | } | |
2045 | /* Otherwise carry over packet_size and overhead from the last | |
2046 | * time we had a remainder. | |
2047 | */ | |
2048 | bw_used += bw_added; | |
2049 | if (bw_used > max_bandwidth) { | |
2050 | xhci_warn(xhci, "Not enough bandwidth. " | |
2051 | "Proposed: %u, Max: %u\n", | |
2052 | bw_used, max_bandwidth); | |
2053 | return -ENOMEM; | |
2054 | } | |
2055 | } | |
2056 | /* | |
2057 | * Ok, we know we have some packets left over after even-handedly | |
2058 | * scheduling interval 15. We don't know which microframes they will | |
2059 | * fit into, so we over-schedule and say they will be scheduled every | |
2060 | * microframe. | |
2061 | */ | |
2062 | if (packets_remaining > 0) | |
2063 | bw_used += overhead + packet_size; | |
2064 | ||
2065 | if (!virt_dev->tt_info && virt_dev->udev->speed == USB_SPEED_HIGH) { | |
2066 | unsigned int port_index = virt_dev->real_port - 1; | |
2067 | ||
2068 | /* OK, we're manipulating a HS device attached to a | |
2069 | * root port bandwidth domain. Include the number of active TTs | |
2070 | * in the bandwidth used. | |
2071 | */ | |
2072 | bw_used += TT_HS_OVERHEAD * | |
2073 | xhci->rh_bw[port_index].num_active_tts; | |
2074 | } | |
2075 | ||
2076 | xhci_dbg(xhci, "Final bandwidth: %u, Limit: %u, Reserved: %u, " | |
2077 | "Available: %u " "percent\n", | |
2078 | bw_used, max_bandwidth, bw_reserved, | |
2079 | (max_bandwidth - bw_used - bw_reserved) * 100 / | |
2080 | max_bandwidth); | |
2081 | ||
2082 | bw_used += bw_reserved; | |
2083 | if (bw_used > max_bandwidth) { | |
2084 | xhci_warn(xhci, "Not enough bandwidth. Proposed: %u, Max: %u\n", | |
2085 | bw_used, max_bandwidth); | |
2086 | return -ENOMEM; | |
2087 | } | |
2088 | ||
2089 | bw_table->bw_used = bw_used; | |
2e27980e SS |
2090 | return 0; |
2091 | } | |
2092 | ||
2093 | static bool xhci_is_async_ep(unsigned int ep_type) | |
2094 | { | |
2095 | return (ep_type != ISOC_OUT_EP && ep_type != INT_OUT_EP && | |
2096 | ep_type != ISOC_IN_EP && | |
2097 | ep_type != INT_IN_EP); | |
2098 | } | |
2099 | ||
2b698999 SS |
2100 | static bool xhci_is_sync_in_ep(unsigned int ep_type) |
2101 | { | |
2102 | return (ep_type == ISOC_IN_EP || ep_type != INT_IN_EP); | |
2103 | } | |
2104 | ||
2105 | static unsigned int xhci_get_ss_bw_consumed(struct xhci_bw_info *ep_bw) | |
2106 | { | |
2107 | unsigned int mps = DIV_ROUND_UP(ep_bw->max_packet_size, SS_BLOCK); | |
2108 | ||
2109 | if (ep_bw->ep_interval == 0) | |
2110 | return SS_OVERHEAD_BURST + | |
2111 | (ep_bw->mult * ep_bw->num_packets * | |
2112 | (SS_OVERHEAD + mps)); | |
2113 | return DIV_ROUND_UP(ep_bw->mult * ep_bw->num_packets * | |
2114 | (SS_OVERHEAD + mps + SS_OVERHEAD_BURST), | |
2115 | 1 << ep_bw->ep_interval); | |
2116 | ||
2117 | } | |
2118 | ||
2e27980e SS |
2119 | void xhci_drop_ep_from_interval_table(struct xhci_hcd *xhci, |
2120 | struct xhci_bw_info *ep_bw, | |
2121 | struct xhci_interval_bw_table *bw_table, | |
2122 | struct usb_device *udev, | |
2123 | struct xhci_virt_ep *virt_ep, | |
2124 | struct xhci_tt_bw_info *tt_info) | |
2125 | { | |
2126 | struct xhci_interval_bw *interval_bw; | |
2127 | int normalized_interval; | |
2128 | ||
2b698999 | 2129 | if (xhci_is_async_ep(ep_bw->type)) |
2e27980e SS |
2130 | return; |
2131 | ||
2b698999 SS |
2132 | if (udev->speed == USB_SPEED_SUPER) { |
2133 | if (xhci_is_sync_in_ep(ep_bw->type)) | |
2134 | xhci->devs[udev->slot_id]->bw_table->ss_bw_in -= | |
2135 | xhci_get_ss_bw_consumed(ep_bw); | |
2136 | else | |
2137 | xhci->devs[udev->slot_id]->bw_table->ss_bw_out -= | |
2138 | xhci_get_ss_bw_consumed(ep_bw); | |
2139 | return; | |
2140 | } | |
2141 | ||
2142 | /* SuperSpeed endpoints never get added to intervals in the table, so | |
2143 | * this check is only valid for HS/FS/LS devices. | |
2144 | */ | |
2145 | if (list_empty(&virt_ep->bw_endpoint_list)) | |
2146 | return; | |
2e27980e SS |
2147 | /* For LS/FS devices, we need to translate the interval expressed in |
2148 | * microframes to frames. | |
2149 | */ | |
2150 | if (udev->speed == USB_SPEED_HIGH) | |
2151 | normalized_interval = ep_bw->ep_interval; | |
2152 | else | |
2153 | normalized_interval = ep_bw->ep_interval - 3; | |
2154 | ||
2155 | if (normalized_interval == 0) | |
2156 | bw_table->interval0_esit_payload -= ep_bw->max_esit_payload; | |
2157 | interval_bw = &bw_table->interval_bw[normalized_interval]; | |
2158 | interval_bw->num_packets -= ep_bw->num_packets; | |
2159 | switch (udev->speed) { | |
2160 | case USB_SPEED_LOW: | |
2161 | interval_bw->overhead[LS_OVERHEAD_TYPE] -= 1; | |
2162 | break; | |
2163 | case USB_SPEED_FULL: | |
2164 | interval_bw->overhead[FS_OVERHEAD_TYPE] -= 1; | |
2165 | break; | |
2166 | case USB_SPEED_HIGH: | |
2167 | interval_bw->overhead[HS_OVERHEAD_TYPE] -= 1; | |
2168 | break; | |
2169 | case USB_SPEED_SUPER: | |
2170 | case USB_SPEED_UNKNOWN: | |
2171 | case USB_SPEED_WIRELESS: | |
2172 | /* Should never happen because only LS/FS/HS endpoints will get | |
2173 | * added to the endpoint list. | |
2174 | */ | |
2175 | return; | |
2176 | } | |
2177 | if (tt_info) | |
2178 | tt_info->active_eps -= 1; | |
2179 | list_del_init(&virt_ep->bw_endpoint_list); | |
2180 | } | |
2181 | ||
2182 | static void xhci_add_ep_to_interval_table(struct xhci_hcd *xhci, | |
2183 | struct xhci_bw_info *ep_bw, | |
2184 | struct xhci_interval_bw_table *bw_table, | |
2185 | struct usb_device *udev, | |
2186 | struct xhci_virt_ep *virt_ep, | |
2187 | struct xhci_tt_bw_info *tt_info) | |
2188 | { | |
2189 | struct xhci_interval_bw *interval_bw; | |
2190 | struct xhci_virt_ep *smaller_ep; | |
2191 | int normalized_interval; | |
2192 | ||
2193 | if (xhci_is_async_ep(ep_bw->type)) | |
2194 | return; | |
2195 | ||
2b698999 SS |
2196 | if (udev->speed == USB_SPEED_SUPER) { |
2197 | if (xhci_is_sync_in_ep(ep_bw->type)) | |
2198 | xhci->devs[udev->slot_id]->bw_table->ss_bw_in += | |
2199 | xhci_get_ss_bw_consumed(ep_bw); | |
2200 | else | |
2201 | xhci->devs[udev->slot_id]->bw_table->ss_bw_out += | |
2202 | xhci_get_ss_bw_consumed(ep_bw); | |
2203 | return; | |
2204 | } | |
2205 | ||
2e27980e SS |
2206 | /* For LS/FS devices, we need to translate the interval expressed in |
2207 | * microframes to frames. | |
2208 | */ | |
2209 | if (udev->speed == USB_SPEED_HIGH) | |
2210 | normalized_interval = ep_bw->ep_interval; | |
2211 | else | |
2212 | normalized_interval = ep_bw->ep_interval - 3; | |
2213 | ||
2214 | if (normalized_interval == 0) | |
2215 | bw_table->interval0_esit_payload += ep_bw->max_esit_payload; | |
2216 | interval_bw = &bw_table->interval_bw[normalized_interval]; | |
2217 | interval_bw->num_packets += ep_bw->num_packets; | |
2218 | switch (udev->speed) { | |
2219 | case USB_SPEED_LOW: | |
2220 | interval_bw->overhead[LS_OVERHEAD_TYPE] += 1; | |
2221 | break; | |
2222 | case USB_SPEED_FULL: | |
2223 | interval_bw->overhead[FS_OVERHEAD_TYPE] += 1; | |
2224 | break; | |
2225 | case USB_SPEED_HIGH: | |
2226 | interval_bw->overhead[HS_OVERHEAD_TYPE] += 1; | |
2227 | break; | |
2228 | case USB_SPEED_SUPER: | |
2229 | case USB_SPEED_UNKNOWN: | |
2230 | case USB_SPEED_WIRELESS: | |
2231 | /* Should never happen because only LS/FS/HS endpoints will get | |
2232 | * added to the endpoint list. | |
2233 | */ | |
2234 | return; | |
2235 | } | |
2236 | ||
2237 | if (tt_info) | |
2238 | tt_info->active_eps += 1; | |
2239 | /* Insert the endpoint into the list, largest max packet size first. */ | |
2240 | list_for_each_entry(smaller_ep, &interval_bw->endpoints, | |
2241 | bw_endpoint_list) { | |
2242 | if (ep_bw->max_packet_size >= | |
2243 | smaller_ep->bw_info.max_packet_size) { | |
2244 | /* Add the new ep before the smaller endpoint */ | |
2245 | list_add_tail(&virt_ep->bw_endpoint_list, | |
2246 | &smaller_ep->bw_endpoint_list); | |
2247 | return; | |
2248 | } | |
2249 | } | |
2250 | /* Add the new endpoint at the end of the list. */ | |
2251 | list_add_tail(&virt_ep->bw_endpoint_list, | |
2252 | &interval_bw->endpoints); | |
2253 | } | |
2254 | ||
2255 | void xhci_update_tt_active_eps(struct xhci_hcd *xhci, | |
2256 | struct xhci_virt_device *virt_dev, | |
2257 | int old_active_eps) | |
2258 | { | |
2259 | struct xhci_root_port_bw_info *rh_bw_info; | |
2260 | if (!virt_dev->tt_info) | |
2261 | return; | |
2262 | ||
2263 | rh_bw_info = &xhci->rh_bw[virt_dev->real_port - 1]; | |
2264 | if (old_active_eps == 0 && | |
2265 | virt_dev->tt_info->active_eps != 0) { | |
2266 | rh_bw_info->num_active_tts += 1; | |
c29eea62 | 2267 | rh_bw_info->bw_table.bw_used += TT_HS_OVERHEAD; |
2e27980e SS |
2268 | } else if (old_active_eps != 0 && |
2269 | virt_dev->tt_info->active_eps == 0) { | |
2270 | rh_bw_info->num_active_tts -= 1; | |
c29eea62 | 2271 | rh_bw_info->bw_table.bw_used -= TT_HS_OVERHEAD; |
2e27980e SS |
2272 | } |
2273 | } | |
2274 | ||
2275 | static int xhci_reserve_bandwidth(struct xhci_hcd *xhci, | |
2276 | struct xhci_virt_device *virt_dev, | |
2277 | struct xhci_container_ctx *in_ctx) | |
2278 | { | |
2279 | struct xhci_bw_info ep_bw_info[31]; | |
2280 | int i; | |
2281 | struct xhci_input_control_ctx *ctrl_ctx; | |
2282 | int old_active_eps = 0; | |
2283 | ||
2e27980e SS |
2284 | if (virt_dev->tt_info) |
2285 | old_active_eps = virt_dev->tt_info->active_eps; | |
2286 | ||
2287 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
2288 | ||
2289 | for (i = 0; i < 31; i++) { | |
2290 | if (!EP_IS_ADDED(ctrl_ctx, i) && !EP_IS_DROPPED(ctrl_ctx, i)) | |
2291 | continue; | |
2292 | ||
2293 | /* Make a copy of the BW info in case we need to revert this */ | |
2294 | memcpy(&ep_bw_info[i], &virt_dev->eps[i].bw_info, | |
2295 | sizeof(ep_bw_info[i])); | |
2296 | /* Drop the endpoint from the interval table if the endpoint is | |
2297 | * being dropped or changed. | |
2298 | */ | |
2299 | if (EP_IS_DROPPED(ctrl_ctx, i)) | |
2300 | xhci_drop_ep_from_interval_table(xhci, | |
2301 | &virt_dev->eps[i].bw_info, | |
2302 | virt_dev->bw_table, | |
2303 | virt_dev->udev, | |
2304 | &virt_dev->eps[i], | |
2305 | virt_dev->tt_info); | |
2306 | } | |
2307 | /* Overwrite the information stored in the endpoints' bw_info */ | |
2308 | xhci_update_bw_info(xhci, virt_dev->in_ctx, ctrl_ctx, virt_dev); | |
2309 | for (i = 0; i < 31; i++) { | |
2310 | /* Add any changed or added endpoints to the interval table */ | |
2311 | if (EP_IS_ADDED(ctrl_ctx, i)) | |
2312 | xhci_add_ep_to_interval_table(xhci, | |
2313 | &virt_dev->eps[i].bw_info, | |
2314 | virt_dev->bw_table, | |
2315 | virt_dev->udev, | |
2316 | &virt_dev->eps[i], | |
2317 | virt_dev->tt_info); | |
2318 | } | |
2319 | ||
2320 | if (!xhci_check_bw_table(xhci, virt_dev, old_active_eps)) { | |
2321 | /* Ok, this fits in the bandwidth we have. | |
2322 | * Update the number of active TTs. | |
2323 | */ | |
2324 | xhci_update_tt_active_eps(xhci, virt_dev, old_active_eps); | |
2325 | return 0; | |
2326 | } | |
2327 | ||
2328 | /* We don't have enough bandwidth for this, revert the stored info. */ | |
2329 | for (i = 0; i < 31; i++) { | |
2330 | if (!EP_IS_ADDED(ctrl_ctx, i) && !EP_IS_DROPPED(ctrl_ctx, i)) | |
2331 | continue; | |
2332 | ||
2333 | /* Drop the new copies of any added or changed endpoints from | |
2334 | * the interval table. | |
2335 | */ | |
2336 | if (EP_IS_ADDED(ctrl_ctx, i)) { | |
2337 | xhci_drop_ep_from_interval_table(xhci, | |
2338 | &virt_dev->eps[i].bw_info, | |
2339 | virt_dev->bw_table, | |
2340 | virt_dev->udev, | |
2341 | &virt_dev->eps[i], | |
2342 | virt_dev->tt_info); | |
2343 | } | |
2344 | /* Revert the endpoint back to its old information */ | |
2345 | memcpy(&virt_dev->eps[i].bw_info, &ep_bw_info[i], | |
2346 | sizeof(ep_bw_info[i])); | |
2347 | /* Add any changed or dropped endpoints back into the table */ | |
2348 | if (EP_IS_DROPPED(ctrl_ctx, i)) | |
2349 | xhci_add_ep_to_interval_table(xhci, | |
2350 | &virt_dev->eps[i].bw_info, | |
2351 | virt_dev->bw_table, | |
2352 | virt_dev->udev, | |
2353 | &virt_dev->eps[i], | |
2354 | virt_dev->tt_info); | |
2355 | } | |
2356 | return -ENOMEM; | |
2357 | } | |
2358 | ||
2359 | ||
f2217e8e SS |
2360 | /* Issue a configure endpoint command or evaluate context command |
2361 | * and wait for it to finish. | |
2362 | */ | |
2363 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, | |
913a8a34 SS |
2364 | struct usb_device *udev, |
2365 | struct xhci_command *command, | |
2366 | bool ctx_change, bool must_succeed) | |
f2217e8e SS |
2367 | { |
2368 | int ret; | |
2369 | int timeleft; | |
2370 | unsigned long flags; | |
913a8a34 SS |
2371 | struct xhci_container_ctx *in_ctx; |
2372 | struct completion *cmd_completion; | |
28ccd296 | 2373 | u32 *cmd_status; |
913a8a34 | 2374 | struct xhci_virt_device *virt_dev; |
f2217e8e SS |
2375 | |
2376 | spin_lock_irqsave(&xhci->lock, flags); | |
913a8a34 | 2377 | virt_dev = xhci->devs[udev->slot_id]; |
750645f8 SS |
2378 | |
2379 | if (command) | |
913a8a34 | 2380 | in_ctx = command->in_ctx; |
750645f8 SS |
2381 | else |
2382 | in_ctx = virt_dev->in_ctx; | |
2cf95c18 | 2383 | |
750645f8 SS |
2384 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK) && |
2385 | xhci_reserve_host_resources(xhci, in_ctx)) { | |
2386 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2387 | xhci_warn(xhci, "Not enough host resources, " | |
2388 | "active endpoint contexts = %u\n", | |
2389 | xhci->num_active_eps); | |
2390 | return -ENOMEM; | |
2391 | } | |
2e27980e SS |
2392 | if ((xhci->quirks & XHCI_SW_BW_CHECKING) && |
2393 | xhci_reserve_bandwidth(xhci, virt_dev, in_ctx)) { | |
2394 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) | |
2395 | xhci_free_host_resources(xhci, in_ctx); | |
2396 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2397 | xhci_warn(xhci, "Not enough bandwidth\n"); | |
2398 | return -ENOMEM; | |
2399 | } | |
750645f8 SS |
2400 | |
2401 | if (command) { | |
913a8a34 SS |
2402 | cmd_completion = command->completion; |
2403 | cmd_status = &command->status; | |
2404 | command->command_trb = xhci->cmd_ring->enqueue; | |
7a3783ef PZ |
2405 | |
2406 | /* Enqueue pointer can be left pointing to the link TRB, | |
2407 | * we must handle that | |
2408 | */ | |
f5960b69 | 2409 | if (TRB_TYPE_LINK_LE32(command->command_trb->link.control)) |
7a3783ef PZ |
2410 | command->command_trb = |
2411 | xhci->cmd_ring->enq_seg->next->trbs; | |
2412 | ||
913a8a34 SS |
2413 | list_add_tail(&command->cmd_list, &virt_dev->cmd_list); |
2414 | } else { | |
913a8a34 SS |
2415 | cmd_completion = &virt_dev->cmd_completion; |
2416 | cmd_status = &virt_dev->cmd_status; | |
2417 | } | |
1d68064a | 2418 | init_completion(cmd_completion); |
913a8a34 | 2419 | |
f2217e8e | 2420 | if (!ctx_change) |
913a8a34 SS |
2421 | ret = xhci_queue_configure_endpoint(xhci, in_ctx->dma, |
2422 | udev->slot_id, must_succeed); | |
f2217e8e | 2423 | else |
913a8a34 | 2424 | ret = xhci_queue_evaluate_context(xhci, in_ctx->dma, |
f2217e8e SS |
2425 | udev->slot_id); |
2426 | if (ret < 0) { | |
c01591bd SS |
2427 | if (command) |
2428 | list_del(&command->cmd_list); | |
2cf95c18 SS |
2429 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) |
2430 | xhci_free_host_resources(xhci, in_ctx); | |
f2217e8e SS |
2431 | spin_unlock_irqrestore(&xhci->lock, flags); |
2432 | xhci_dbg(xhci, "FIXME allocate a new ring segment\n"); | |
2433 | return -ENOMEM; | |
2434 | } | |
2435 | xhci_ring_cmd_db(xhci); | |
2436 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2437 | ||
2438 | /* Wait for the configure endpoint command to complete */ | |
2439 | timeleft = wait_for_completion_interruptible_timeout( | |
913a8a34 | 2440 | cmd_completion, |
f2217e8e SS |
2441 | USB_CTRL_SET_TIMEOUT); |
2442 | if (timeleft <= 0) { | |
2443 | xhci_warn(xhci, "%s while waiting for %s command\n", | |
2444 | timeleft == 0 ? "Timeout" : "Signal", | |
2445 | ctx_change == 0 ? | |
2446 | "configure endpoint" : | |
2447 | "evaluate context"); | |
2448 | /* FIXME cancel the configure endpoint command */ | |
2449 | return -ETIME; | |
2450 | } | |
2451 | ||
2452 | if (!ctx_change) | |
2cf95c18 SS |
2453 | ret = xhci_configure_endpoint_result(xhci, udev, cmd_status); |
2454 | else | |
2455 | ret = xhci_evaluate_context_result(xhci, udev, cmd_status); | |
2456 | ||
2457 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { | |
2458 | spin_lock_irqsave(&xhci->lock, flags); | |
2459 | /* If the command failed, remove the reserved resources. | |
2460 | * Otherwise, clean up the estimate to include dropped eps. | |
2461 | */ | |
2462 | if (ret) | |
2463 | xhci_free_host_resources(xhci, in_ctx); | |
2464 | else | |
2465 | xhci_finish_resource_reservation(xhci, in_ctx); | |
2466 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2467 | } | |
2468 | return ret; | |
f2217e8e SS |
2469 | } |
2470 | ||
f88ba78d SS |
2471 | /* Called after one or more calls to xhci_add_endpoint() or |
2472 | * xhci_drop_endpoint(). If this call fails, the USB core is expected | |
2473 | * to call xhci_reset_bandwidth(). | |
2474 | * | |
2475 | * Since we are in the middle of changing either configuration or | |
2476 | * installing a new alt setting, the USB core won't allow URBs to be | |
2477 | * enqueued for any endpoint on the old config or interface. Nothing | |
2478 | * else should be touching the xhci->devs[slot_id] structure, so we | |
2479 | * don't need to take the xhci->lock for manipulating that. | |
2480 | */ | |
f94e0186 SS |
2481 | int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) |
2482 | { | |
2483 | int i; | |
2484 | int ret = 0; | |
f94e0186 SS |
2485 | struct xhci_hcd *xhci; |
2486 | struct xhci_virt_device *virt_dev; | |
d115b048 JY |
2487 | struct xhci_input_control_ctx *ctrl_ctx; |
2488 | struct xhci_slot_ctx *slot_ctx; | |
f94e0186 | 2489 | |
64927730 | 2490 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
f94e0186 SS |
2491 | if (ret <= 0) |
2492 | return ret; | |
2493 | xhci = hcd_to_xhci(hcd); | |
fe6c6c13 SS |
2494 | if (xhci->xhc_state & XHCI_STATE_DYING) |
2495 | return -ENODEV; | |
f94e0186 | 2496 | |
700e2052 | 2497 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
2498 | virt_dev = xhci->devs[udev->slot_id]; |
2499 | ||
2500 | /* See section 4.6.6 - A0 = 1; A1 = D0 = D1 = 0 */ | |
d115b048 | 2501 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
28ccd296 ME |
2502 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
2503 | ctrl_ctx->add_flags &= cpu_to_le32(~EP0_FLAG); | |
2504 | ctrl_ctx->drop_flags &= cpu_to_le32(~(SLOT_FLAG | EP0_FLAG)); | |
2dc37539 SS |
2505 | |
2506 | /* Don't issue the command if there's no endpoints to update. */ | |
2507 | if (ctrl_ctx->add_flags == cpu_to_le32(SLOT_FLAG) && | |
2508 | ctrl_ctx->drop_flags == 0) | |
2509 | return 0; | |
2510 | ||
f94e0186 | 2511 | xhci_dbg(xhci, "New Input Control Context:\n"); |
d115b048 JY |
2512 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
2513 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, | |
28ccd296 | 2514 | LAST_CTX_TO_EP_NUM(le32_to_cpu(slot_ctx->dev_info))); |
f94e0186 | 2515 | |
913a8a34 SS |
2516 | ret = xhci_configure_endpoint(xhci, udev, NULL, |
2517 | false, false); | |
f94e0186 SS |
2518 | if (ret) { |
2519 | /* Callee should call reset_bandwidth() */ | |
f94e0186 SS |
2520 | return ret; |
2521 | } | |
2522 | ||
2523 | xhci_dbg(xhci, "Output context after successful config ep cmd:\n"); | |
d115b048 | 2524 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, |
28ccd296 | 2525 | LAST_CTX_TO_EP_NUM(le32_to_cpu(slot_ctx->dev_info))); |
f94e0186 | 2526 | |
834cb0fc SS |
2527 | /* Free any rings that were dropped, but not changed. */ |
2528 | for (i = 1; i < 31; ++i) { | |
4819fef5 ME |
2529 | if ((le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1))) && |
2530 | !(le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1)))) | |
834cb0fc SS |
2531 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); |
2532 | } | |
d115b048 | 2533 | xhci_zero_in_ctx(xhci, virt_dev); |
834cb0fc SS |
2534 | /* |
2535 | * Install any rings for completely new endpoints or changed endpoints, | |
2536 | * and free or cache any old rings from changed endpoints. | |
2537 | */ | |
f94e0186 | 2538 | for (i = 1; i < 31; ++i) { |
74f9fe21 SS |
2539 | if (!virt_dev->eps[i].new_ring) |
2540 | continue; | |
2541 | /* Only cache or free the old ring if it exists. | |
2542 | * It may not if this is the first add of an endpoint. | |
2543 | */ | |
2544 | if (virt_dev->eps[i].ring) { | |
412566bd | 2545 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); |
f94e0186 | 2546 | } |
74f9fe21 SS |
2547 | virt_dev->eps[i].ring = virt_dev->eps[i].new_ring; |
2548 | virt_dev->eps[i].new_ring = NULL; | |
f94e0186 SS |
2549 | } |
2550 | ||
f94e0186 SS |
2551 | return ret; |
2552 | } | |
2553 | ||
2554 | void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) | |
2555 | { | |
f94e0186 SS |
2556 | struct xhci_hcd *xhci; |
2557 | struct xhci_virt_device *virt_dev; | |
2558 | int i, ret; | |
2559 | ||
64927730 | 2560 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
f94e0186 SS |
2561 | if (ret <= 0) |
2562 | return; | |
2563 | xhci = hcd_to_xhci(hcd); | |
2564 | ||
700e2052 | 2565 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
2566 | virt_dev = xhci->devs[udev->slot_id]; |
2567 | /* Free any rings allocated for added endpoints */ | |
2568 | for (i = 0; i < 31; ++i) { | |
63a0d9ab SS |
2569 | if (virt_dev->eps[i].new_ring) { |
2570 | xhci_ring_free(xhci, virt_dev->eps[i].new_ring); | |
2571 | virt_dev->eps[i].new_ring = NULL; | |
f94e0186 SS |
2572 | } |
2573 | } | |
d115b048 | 2574 | xhci_zero_in_ctx(xhci, virt_dev); |
f94e0186 SS |
2575 | } |
2576 | ||
5270b951 | 2577 | static void xhci_setup_input_ctx_for_config_ep(struct xhci_hcd *xhci, |
913a8a34 SS |
2578 | struct xhci_container_ctx *in_ctx, |
2579 | struct xhci_container_ctx *out_ctx, | |
2580 | u32 add_flags, u32 drop_flags) | |
5270b951 SS |
2581 | { |
2582 | struct xhci_input_control_ctx *ctrl_ctx; | |
913a8a34 | 2583 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); |
28ccd296 ME |
2584 | ctrl_ctx->add_flags = cpu_to_le32(add_flags); |
2585 | ctrl_ctx->drop_flags = cpu_to_le32(drop_flags); | |
913a8a34 | 2586 | xhci_slot_copy(xhci, in_ctx, out_ctx); |
28ccd296 | 2587 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
5270b951 | 2588 | |
913a8a34 SS |
2589 | xhci_dbg(xhci, "Input Context:\n"); |
2590 | xhci_dbg_ctx(xhci, in_ctx, xhci_last_valid_endpoint(add_flags)); | |
5270b951 SS |
2591 | } |
2592 | ||
8212a49d | 2593 | static void xhci_setup_input_ctx_for_quirk(struct xhci_hcd *xhci, |
ac9d8fe7 SS |
2594 | unsigned int slot_id, unsigned int ep_index, |
2595 | struct xhci_dequeue_state *deq_state) | |
2596 | { | |
2597 | struct xhci_container_ctx *in_ctx; | |
ac9d8fe7 SS |
2598 | struct xhci_ep_ctx *ep_ctx; |
2599 | u32 added_ctxs; | |
2600 | dma_addr_t addr; | |
2601 | ||
913a8a34 SS |
2602 | xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, |
2603 | xhci->devs[slot_id]->out_ctx, ep_index); | |
ac9d8fe7 SS |
2604 | in_ctx = xhci->devs[slot_id]->in_ctx; |
2605 | ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); | |
2606 | addr = xhci_trb_virt_to_dma(deq_state->new_deq_seg, | |
2607 | deq_state->new_deq_ptr); | |
2608 | if (addr == 0) { | |
2609 | xhci_warn(xhci, "WARN Cannot submit config ep after " | |
2610 | "reset ep command\n"); | |
2611 | xhci_warn(xhci, "WARN deq seg = %p, deq ptr = %p\n", | |
2612 | deq_state->new_deq_seg, | |
2613 | deq_state->new_deq_ptr); | |
2614 | return; | |
2615 | } | |
28ccd296 | 2616 | ep_ctx->deq = cpu_to_le64(addr | deq_state->new_cycle_state); |
ac9d8fe7 | 2617 | |
ac9d8fe7 | 2618 | added_ctxs = xhci_get_endpoint_flag_from_index(ep_index); |
913a8a34 SS |
2619 | xhci_setup_input_ctx_for_config_ep(xhci, xhci->devs[slot_id]->in_ctx, |
2620 | xhci->devs[slot_id]->out_ctx, added_ctxs, added_ctxs); | |
ac9d8fe7 SS |
2621 | } |
2622 | ||
82d1009f | 2623 | void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci, |
63a0d9ab | 2624 | struct usb_device *udev, unsigned int ep_index) |
82d1009f SS |
2625 | { |
2626 | struct xhci_dequeue_state deq_state; | |
63a0d9ab | 2627 | struct xhci_virt_ep *ep; |
82d1009f SS |
2628 | |
2629 | xhci_dbg(xhci, "Cleaning up stalled endpoint ring\n"); | |
63a0d9ab | 2630 | ep = &xhci->devs[udev->slot_id]->eps[ep_index]; |
82d1009f SS |
2631 | /* We need to move the HW's dequeue pointer past this TD, |
2632 | * or it will attempt to resend it on the next doorbell ring. | |
2633 | */ | |
2634 | xhci_find_new_dequeue_state(xhci, udev->slot_id, | |
e9df17eb | 2635 | ep_index, ep->stopped_stream, ep->stopped_td, |
ac9d8fe7 | 2636 | &deq_state); |
82d1009f | 2637 | |
ac9d8fe7 SS |
2638 | /* HW with the reset endpoint quirk will use the saved dequeue state to |
2639 | * issue a configure endpoint command later. | |
2640 | */ | |
2641 | if (!(xhci->quirks & XHCI_RESET_EP_QUIRK)) { | |
2642 | xhci_dbg(xhci, "Queueing new dequeue state\n"); | |
63a0d9ab | 2643 | xhci_queue_new_dequeue_state(xhci, udev->slot_id, |
e9df17eb | 2644 | ep_index, ep->stopped_stream, &deq_state); |
ac9d8fe7 SS |
2645 | } else { |
2646 | /* Better hope no one uses the input context between now and the | |
2647 | * reset endpoint completion! | |
e9df17eb SS |
2648 | * XXX: No idea how this hardware will react when stream rings |
2649 | * are enabled. | |
ac9d8fe7 SS |
2650 | */ |
2651 | xhci_dbg(xhci, "Setting up input context for " | |
2652 | "configure endpoint command\n"); | |
2653 | xhci_setup_input_ctx_for_quirk(xhci, udev->slot_id, | |
2654 | ep_index, &deq_state); | |
2655 | } | |
82d1009f SS |
2656 | } |
2657 | ||
a1587d97 SS |
2658 | /* Deal with stalled endpoints. The core should have sent the control message |
2659 | * to clear the halt condition. However, we need to make the xHCI hardware | |
2660 | * reset its sequence number, since a device will expect a sequence number of | |
2661 | * zero after the halt condition is cleared. | |
2662 | * Context: in_interrupt | |
2663 | */ | |
2664 | void xhci_endpoint_reset(struct usb_hcd *hcd, | |
2665 | struct usb_host_endpoint *ep) | |
2666 | { | |
2667 | struct xhci_hcd *xhci; | |
2668 | struct usb_device *udev; | |
2669 | unsigned int ep_index; | |
2670 | unsigned long flags; | |
2671 | int ret; | |
63a0d9ab | 2672 | struct xhci_virt_ep *virt_ep; |
a1587d97 SS |
2673 | |
2674 | xhci = hcd_to_xhci(hcd); | |
2675 | udev = (struct usb_device *) ep->hcpriv; | |
2676 | /* Called with a root hub endpoint (or an endpoint that wasn't added | |
2677 | * with xhci_add_endpoint() | |
2678 | */ | |
2679 | if (!ep->hcpriv) | |
2680 | return; | |
2681 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
63a0d9ab SS |
2682 | virt_ep = &xhci->devs[udev->slot_id]->eps[ep_index]; |
2683 | if (!virt_ep->stopped_td) { | |
c92bcfa7 SS |
2684 | xhci_dbg(xhci, "Endpoint 0x%x not halted, refusing to reset.\n", |
2685 | ep->desc.bEndpointAddress); | |
2686 | return; | |
2687 | } | |
82d1009f SS |
2688 | if (usb_endpoint_xfer_control(&ep->desc)) { |
2689 | xhci_dbg(xhci, "Control endpoint stall already handled.\n"); | |
2690 | return; | |
2691 | } | |
a1587d97 SS |
2692 | |
2693 | xhci_dbg(xhci, "Queueing reset endpoint command\n"); | |
2694 | spin_lock_irqsave(&xhci->lock, flags); | |
2695 | ret = xhci_queue_reset_ep(xhci, udev->slot_id, ep_index); | |
c92bcfa7 SS |
2696 | /* |
2697 | * Can't change the ring dequeue pointer until it's transitioned to the | |
2698 | * stopped state, which is only upon a successful reset endpoint | |
2699 | * command. Better hope that last command worked! | |
2700 | */ | |
a1587d97 | 2701 | if (!ret) { |
63a0d9ab SS |
2702 | xhci_cleanup_stalled_ring(xhci, udev, ep_index); |
2703 | kfree(virt_ep->stopped_td); | |
a1587d97 SS |
2704 | xhci_ring_cmd_db(xhci); |
2705 | } | |
1624ae1c SS |
2706 | virt_ep->stopped_td = NULL; |
2707 | virt_ep->stopped_trb = NULL; | |
5e5cf6fc | 2708 | virt_ep->stopped_stream = 0; |
a1587d97 SS |
2709 | spin_unlock_irqrestore(&xhci->lock, flags); |
2710 | ||
2711 | if (ret) | |
2712 | xhci_warn(xhci, "FIXME allocate a new ring segment\n"); | |
2713 | } | |
2714 | ||
8df75f42 SS |
2715 | static int xhci_check_streams_endpoint(struct xhci_hcd *xhci, |
2716 | struct usb_device *udev, struct usb_host_endpoint *ep, | |
2717 | unsigned int slot_id) | |
2718 | { | |
2719 | int ret; | |
2720 | unsigned int ep_index; | |
2721 | unsigned int ep_state; | |
2722 | ||
2723 | if (!ep) | |
2724 | return -EINVAL; | |
64927730 | 2725 | ret = xhci_check_args(xhci_to_hcd(xhci), udev, ep, 1, true, __func__); |
8df75f42 SS |
2726 | if (ret <= 0) |
2727 | return -EINVAL; | |
842f1690 | 2728 | if (ep->ss_ep_comp.bmAttributes == 0) { |
8df75f42 SS |
2729 | xhci_warn(xhci, "WARN: SuperSpeed Endpoint Companion" |
2730 | " descriptor for ep 0x%x does not support streams\n", | |
2731 | ep->desc.bEndpointAddress); | |
2732 | return -EINVAL; | |
2733 | } | |
2734 | ||
2735 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
2736 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; | |
2737 | if (ep_state & EP_HAS_STREAMS || | |
2738 | ep_state & EP_GETTING_STREAMS) { | |
2739 | xhci_warn(xhci, "WARN: SuperSpeed bulk endpoint 0x%x " | |
2740 | "already has streams set up.\n", | |
2741 | ep->desc.bEndpointAddress); | |
2742 | xhci_warn(xhci, "Send email to xHCI maintainer and ask for " | |
2743 | "dynamic stream context array reallocation.\n"); | |
2744 | return -EINVAL; | |
2745 | } | |
2746 | if (!list_empty(&xhci->devs[slot_id]->eps[ep_index].ring->td_list)) { | |
2747 | xhci_warn(xhci, "Cannot setup streams for SuperSpeed bulk " | |
2748 | "endpoint 0x%x; URBs are pending.\n", | |
2749 | ep->desc.bEndpointAddress); | |
2750 | return -EINVAL; | |
2751 | } | |
2752 | return 0; | |
2753 | } | |
2754 | ||
2755 | static void xhci_calculate_streams_entries(struct xhci_hcd *xhci, | |
2756 | unsigned int *num_streams, unsigned int *num_stream_ctxs) | |
2757 | { | |
2758 | unsigned int max_streams; | |
2759 | ||
2760 | /* The stream context array size must be a power of two */ | |
2761 | *num_stream_ctxs = roundup_pow_of_two(*num_streams); | |
2762 | /* | |
2763 | * Find out how many primary stream array entries the host controller | |
2764 | * supports. Later we may use secondary stream arrays (similar to 2nd | |
2765 | * level page entries), but that's an optional feature for xHCI host | |
2766 | * controllers. xHCs must support at least 4 stream IDs. | |
2767 | */ | |
2768 | max_streams = HCC_MAX_PSA(xhci->hcc_params); | |
2769 | if (*num_stream_ctxs > max_streams) { | |
2770 | xhci_dbg(xhci, "xHCI HW only supports %u stream ctx entries.\n", | |
2771 | max_streams); | |
2772 | *num_stream_ctxs = max_streams; | |
2773 | *num_streams = max_streams; | |
2774 | } | |
2775 | } | |
2776 | ||
2777 | /* Returns an error code if one of the endpoint already has streams. | |
2778 | * This does not change any data structures, it only checks and gathers | |
2779 | * information. | |
2780 | */ | |
2781 | static int xhci_calculate_streams_and_bitmask(struct xhci_hcd *xhci, | |
2782 | struct usb_device *udev, | |
2783 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2784 | unsigned int *num_streams, u32 *changed_ep_bitmask) | |
2785 | { | |
8df75f42 SS |
2786 | unsigned int max_streams; |
2787 | unsigned int endpoint_flag; | |
2788 | int i; | |
2789 | int ret; | |
2790 | ||
2791 | for (i = 0; i < num_eps; i++) { | |
2792 | ret = xhci_check_streams_endpoint(xhci, udev, | |
2793 | eps[i], udev->slot_id); | |
2794 | if (ret < 0) | |
2795 | return ret; | |
2796 | ||
842f1690 AS |
2797 | max_streams = USB_SS_MAX_STREAMS( |
2798 | eps[i]->ss_ep_comp.bmAttributes); | |
8df75f42 SS |
2799 | if (max_streams < (*num_streams - 1)) { |
2800 | xhci_dbg(xhci, "Ep 0x%x only supports %u stream IDs.\n", | |
2801 | eps[i]->desc.bEndpointAddress, | |
2802 | max_streams); | |
2803 | *num_streams = max_streams+1; | |
2804 | } | |
2805 | ||
2806 | endpoint_flag = xhci_get_endpoint_flag(&eps[i]->desc); | |
2807 | if (*changed_ep_bitmask & endpoint_flag) | |
2808 | return -EINVAL; | |
2809 | *changed_ep_bitmask |= endpoint_flag; | |
2810 | } | |
2811 | return 0; | |
2812 | } | |
2813 | ||
2814 | static u32 xhci_calculate_no_streams_bitmask(struct xhci_hcd *xhci, | |
2815 | struct usb_device *udev, | |
2816 | struct usb_host_endpoint **eps, unsigned int num_eps) | |
2817 | { | |
2818 | u32 changed_ep_bitmask = 0; | |
2819 | unsigned int slot_id; | |
2820 | unsigned int ep_index; | |
2821 | unsigned int ep_state; | |
2822 | int i; | |
2823 | ||
2824 | slot_id = udev->slot_id; | |
2825 | if (!xhci->devs[slot_id]) | |
2826 | return 0; | |
2827 | ||
2828 | for (i = 0; i < num_eps; i++) { | |
2829 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2830 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; | |
2831 | /* Are streams already being freed for the endpoint? */ | |
2832 | if (ep_state & EP_GETTING_NO_STREAMS) { | |
2833 | xhci_warn(xhci, "WARN Can't disable streams for " | |
2834 | "endpoint 0x%x\n, " | |
2835 | "streams are being disabled already.", | |
2836 | eps[i]->desc.bEndpointAddress); | |
2837 | return 0; | |
2838 | } | |
2839 | /* Are there actually any streams to free? */ | |
2840 | if (!(ep_state & EP_HAS_STREAMS) && | |
2841 | !(ep_state & EP_GETTING_STREAMS)) { | |
2842 | xhci_warn(xhci, "WARN Can't disable streams for " | |
2843 | "endpoint 0x%x\n, " | |
2844 | "streams are already disabled!", | |
2845 | eps[i]->desc.bEndpointAddress); | |
2846 | xhci_warn(xhci, "WARN xhci_free_streams() called " | |
2847 | "with non-streams endpoint\n"); | |
2848 | return 0; | |
2849 | } | |
2850 | changed_ep_bitmask |= xhci_get_endpoint_flag(&eps[i]->desc); | |
2851 | } | |
2852 | return changed_ep_bitmask; | |
2853 | } | |
2854 | ||
2855 | /* | |
2856 | * The USB device drivers use this function (though the HCD interface in USB | |
2857 | * core) to prepare a set of bulk endpoints to use streams. Streams are used to | |
2858 | * coordinate mass storage command queueing across multiple endpoints (basically | |
2859 | * a stream ID == a task ID). | |
2860 | * | |
2861 | * Setting up streams involves allocating the same size stream context array | |
2862 | * for each endpoint and issuing a configure endpoint command for all endpoints. | |
2863 | * | |
2864 | * Don't allow the call to succeed if one endpoint only supports one stream | |
2865 | * (which means it doesn't support streams at all). | |
2866 | * | |
2867 | * Drivers may get less stream IDs than they asked for, if the host controller | |
2868 | * hardware or endpoints claim they can't support the number of requested | |
2869 | * stream IDs. | |
2870 | */ | |
2871 | int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, | |
2872 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2873 | unsigned int num_streams, gfp_t mem_flags) | |
2874 | { | |
2875 | int i, ret; | |
2876 | struct xhci_hcd *xhci; | |
2877 | struct xhci_virt_device *vdev; | |
2878 | struct xhci_command *config_cmd; | |
2879 | unsigned int ep_index; | |
2880 | unsigned int num_stream_ctxs; | |
2881 | unsigned long flags; | |
2882 | u32 changed_ep_bitmask = 0; | |
2883 | ||
2884 | if (!eps) | |
2885 | return -EINVAL; | |
2886 | ||
2887 | /* Add one to the number of streams requested to account for | |
2888 | * stream 0 that is reserved for xHCI usage. | |
2889 | */ | |
2890 | num_streams += 1; | |
2891 | xhci = hcd_to_xhci(hcd); | |
2892 | xhci_dbg(xhci, "Driver wants %u stream IDs (including stream 0).\n", | |
2893 | num_streams); | |
2894 | ||
2895 | config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); | |
2896 | if (!config_cmd) { | |
2897 | xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); | |
2898 | return -ENOMEM; | |
2899 | } | |
2900 | ||
2901 | /* Check to make sure all endpoints are not already configured for | |
2902 | * streams. While we're at it, find the maximum number of streams that | |
2903 | * all the endpoints will support and check for duplicate endpoints. | |
2904 | */ | |
2905 | spin_lock_irqsave(&xhci->lock, flags); | |
2906 | ret = xhci_calculate_streams_and_bitmask(xhci, udev, eps, | |
2907 | num_eps, &num_streams, &changed_ep_bitmask); | |
2908 | if (ret < 0) { | |
2909 | xhci_free_command(xhci, config_cmd); | |
2910 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2911 | return ret; | |
2912 | } | |
2913 | if (num_streams <= 1) { | |
2914 | xhci_warn(xhci, "WARN: endpoints can't handle " | |
2915 | "more than one stream.\n"); | |
2916 | xhci_free_command(xhci, config_cmd); | |
2917 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2918 | return -EINVAL; | |
2919 | } | |
2920 | vdev = xhci->devs[udev->slot_id]; | |
25985edc | 2921 | /* Mark each endpoint as being in transition, so |
8df75f42 SS |
2922 | * xhci_urb_enqueue() will reject all URBs. |
2923 | */ | |
2924 | for (i = 0; i < num_eps; i++) { | |
2925 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2926 | vdev->eps[ep_index].ep_state |= EP_GETTING_STREAMS; | |
2927 | } | |
2928 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2929 | ||
2930 | /* Setup internal data structures and allocate HW data structures for | |
2931 | * streams (but don't install the HW structures in the input context | |
2932 | * until we're sure all memory allocation succeeded). | |
2933 | */ | |
2934 | xhci_calculate_streams_entries(xhci, &num_streams, &num_stream_ctxs); | |
2935 | xhci_dbg(xhci, "Need %u stream ctx entries for %u stream IDs.\n", | |
2936 | num_stream_ctxs, num_streams); | |
2937 | ||
2938 | for (i = 0; i < num_eps; i++) { | |
2939 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2940 | vdev->eps[ep_index].stream_info = xhci_alloc_stream_info(xhci, | |
2941 | num_stream_ctxs, | |
2942 | num_streams, mem_flags); | |
2943 | if (!vdev->eps[ep_index].stream_info) | |
2944 | goto cleanup; | |
2945 | /* Set maxPstreams in endpoint context and update deq ptr to | |
2946 | * point to stream context array. FIXME | |
2947 | */ | |
2948 | } | |
2949 | ||
2950 | /* Set up the input context for a configure endpoint command. */ | |
2951 | for (i = 0; i < num_eps; i++) { | |
2952 | struct xhci_ep_ctx *ep_ctx; | |
2953 | ||
2954 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2955 | ep_ctx = xhci_get_ep_ctx(xhci, config_cmd->in_ctx, ep_index); | |
2956 | ||
2957 | xhci_endpoint_copy(xhci, config_cmd->in_ctx, | |
2958 | vdev->out_ctx, ep_index); | |
2959 | xhci_setup_streams_ep_input_ctx(xhci, ep_ctx, | |
2960 | vdev->eps[ep_index].stream_info); | |
2961 | } | |
2962 | /* Tell the HW to drop its old copy of the endpoint context info | |
2963 | * and add the updated copy from the input context. | |
2964 | */ | |
2965 | xhci_setup_input_ctx_for_config_ep(xhci, config_cmd->in_ctx, | |
2966 | vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); | |
2967 | ||
2968 | /* Issue and wait for the configure endpoint command */ | |
2969 | ret = xhci_configure_endpoint(xhci, udev, config_cmd, | |
2970 | false, false); | |
2971 | ||
2972 | /* xHC rejected the configure endpoint command for some reason, so we | |
2973 | * leave the old ring intact and free our internal streams data | |
2974 | * structure. | |
2975 | */ | |
2976 | if (ret < 0) | |
2977 | goto cleanup; | |
2978 | ||
2979 | spin_lock_irqsave(&xhci->lock, flags); | |
2980 | for (i = 0; i < num_eps; i++) { | |
2981 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2982 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; | |
2983 | xhci_dbg(xhci, "Slot %u ep ctx %u now has streams.\n", | |
2984 | udev->slot_id, ep_index); | |
2985 | vdev->eps[ep_index].ep_state |= EP_HAS_STREAMS; | |
2986 | } | |
2987 | xhci_free_command(xhci, config_cmd); | |
2988 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2989 | ||
2990 | /* Subtract 1 for stream 0, which drivers can't use */ | |
2991 | return num_streams - 1; | |
2992 | ||
2993 | cleanup: | |
2994 | /* If it didn't work, free the streams! */ | |
2995 | for (i = 0; i < num_eps; i++) { | |
2996 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2997 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); | |
8a007748 | 2998 | vdev->eps[ep_index].stream_info = NULL; |
8df75f42 SS |
2999 | /* FIXME Unset maxPstreams in endpoint context and |
3000 | * update deq ptr to point to normal string ring. | |
3001 | */ | |
3002 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; | |
3003 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; | |
3004 | xhci_endpoint_zero(xhci, vdev, eps[i]); | |
3005 | } | |
3006 | xhci_free_command(xhci, config_cmd); | |
3007 | return -ENOMEM; | |
3008 | } | |
3009 | ||
3010 | /* Transition the endpoint from using streams to being a "normal" endpoint | |
3011 | * without streams. | |
3012 | * | |
3013 | * Modify the endpoint context state, submit a configure endpoint command, | |
3014 | * and free all endpoint rings for streams if that completes successfully. | |
3015 | */ | |
3016 | int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev, | |
3017 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
3018 | gfp_t mem_flags) | |
3019 | { | |
3020 | int i, ret; | |
3021 | struct xhci_hcd *xhci; | |
3022 | struct xhci_virt_device *vdev; | |
3023 | struct xhci_command *command; | |
3024 | unsigned int ep_index; | |
3025 | unsigned long flags; | |
3026 | u32 changed_ep_bitmask; | |
3027 | ||
3028 | xhci = hcd_to_xhci(hcd); | |
3029 | vdev = xhci->devs[udev->slot_id]; | |
3030 | ||
3031 | /* Set up a configure endpoint command to remove the streams rings */ | |
3032 | spin_lock_irqsave(&xhci->lock, flags); | |
3033 | changed_ep_bitmask = xhci_calculate_no_streams_bitmask(xhci, | |
3034 | udev, eps, num_eps); | |
3035 | if (changed_ep_bitmask == 0) { | |
3036 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3037 | return -EINVAL; | |
3038 | } | |
3039 | ||
3040 | /* Use the xhci_command structure from the first endpoint. We may have | |
3041 | * allocated too many, but the driver may call xhci_free_streams() for | |
3042 | * each endpoint it grouped into one call to xhci_alloc_streams(). | |
3043 | */ | |
3044 | ep_index = xhci_get_endpoint_index(&eps[0]->desc); | |
3045 | command = vdev->eps[ep_index].stream_info->free_streams_command; | |
3046 | for (i = 0; i < num_eps; i++) { | |
3047 | struct xhci_ep_ctx *ep_ctx; | |
3048 | ||
3049 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3050 | ep_ctx = xhci_get_ep_ctx(xhci, command->in_ctx, ep_index); | |
3051 | xhci->devs[udev->slot_id]->eps[ep_index].ep_state |= | |
3052 | EP_GETTING_NO_STREAMS; | |
3053 | ||
3054 | xhci_endpoint_copy(xhci, command->in_ctx, | |
3055 | vdev->out_ctx, ep_index); | |
3056 | xhci_setup_no_streams_ep_input_ctx(xhci, ep_ctx, | |
3057 | &vdev->eps[ep_index]); | |
3058 | } | |
3059 | xhci_setup_input_ctx_for_config_ep(xhci, command->in_ctx, | |
3060 | vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); | |
3061 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3062 | ||
3063 | /* Issue and wait for the configure endpoint command, | |
3064 | * which must succeed. | |
3065 | */ | |
3066 | ret = xhci_configure_endpoint(xhci, udev, command, | |
3067 | false, true); | |
3068 | ||
3069 | /* xHC rejected the configure endpoint command for some reason, so we | |
3070 | * leave the streams rings intact. | |
3071 | */ | |
3072 | if (ret < 0) | |
3073 | return ret; | |
3074 | ||
3075 | spin_lock_irqsave(&xhci->lock, flags); | |
3076 | for (i = 0; i < num_eps; i++) { | |
3077 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3078 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); | |
8a007748 | 3079 | vdev->eps[ep_index].stream_info = NULL; |
8df75f42 SS |
3080 | /* FIXME Unset maxPstreams in endpoint context and |
3081 | * update deq ptr to point to normal string ring. | |
3082 | */ | |
3083 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_NO_STREAMS; | |
3084 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; | |
3085 | } | |
3086 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3087 | ||
3088 | return 0; | |
3089 | } | |
3090 | ||
2cf95c18 SS |
3091 | /* |
3092 | * Deletes endpoint resources for endpoints that were active before a Reset | |
3093 | * Device command, or a Disable Slot command. The Reset Device command leaves | |
3094 | * the control endpoint intact, whereas the Disable Slot command deletes it. | |
3095 | * | |
3096 | * Must be called with xhci->lock held. | |
3097 | */ | |
3098 | void xhci_free_device_endpoint_resources(struct xhci_hcd *xhci, | |
3099 | struct xhci_virt_device *virt_dev, bool drop_control_ep) | |
3100 | { | |
3101 | int i; | |
3102 | unsigned int num_dropped_eps = 0; | |
3103 | unsigned int drop_flags = 0; | |
3104 | ||
3105 | for (i = (drop_control_ep ? 0 : 1); i < 31; i++) { | |
3106 | if (virt_dev->eps[i].ring) { | |
3107 | drop_flags |= 1 << i; | |
3108 | num_dropped_eps++; | |
3109 | } | |
3110 | } | |
3111 | xhci->num_active_eps -= num_dropped_eps; | |
3112 | if (num_dropped_eps) | |
3113 | xhci_dbg(xhci, "Dropped %u ep ctxs, flags = 0x%x, " | |
3114 | "%u now active.\n", | |
3115 | num_dropped_eps, drop_flags, | |
3116 | xhci->num_active_eps); | |
3117 | } | |
3118 | ||
2a8f82c4 SS |
3119 | /* |
3120 | * This submits a Reset Device Command, which will set the device state to 0, | |
3121 | * set the device address to 0, and disable all the endpoints except the default | |
3122 | * control endpoint. The USB core should come back and call | |
3123 | * xhci_address_device(), and then re-set up the configuration. If this is | |
3124 | * called because of a usb_reset_and_verify_device(), then the old alternate | |
3125 | * settings will be re-installed through the normal bandwidth allocation | |
3126 | * functions. | |
3127 | * | |
3128 | * Wait for the Reset Device command to finish. Remove all structures | |
3129 | * associated with the endpoints that were disabled. Clear the input device | |
3130 | * structure? Cache the rings? Reset the control endpoint 0 max packet size? | |
f0615c45 AX |
3131 | * |
3132 | * If the virt_dev to be reset does not exist or does not match the udev, | |
3133 | * it means the device is lost, possibly due to the xHC restore error and | |
3134 | * re-initialization during S3/S4. In this case, call xhci_alloc_dev() to | |
3135 | * re-allocate the device. | |
2a8f82c4 | 3136 | */ |
f0615c45 | 3137 | int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev) |
2a8f82c4 SS |
3138 | { |
3139 | int ret, i; | |
3140 | unsigned long flags; | |
3141 | struct xhci_hcd *xhci; | |
3142 | unsigned int slot_id; | |
3143 | struct xhci_virt_device *virt_dev; | |
3144 | struct xhci_command *reset_device_cmd; | |
3145 | int timeleft; | |
3146 | int last_freed_endpoint; | |
001fd382 | 3147 | struct xhci_slot_ctx *slot_ctx; |
2e27980e | 3148 | int old_active_eps = 0; |
2a8f82c4 | 3149 | |
f0615c45 | 3150 | ret = xhci_check_args(hcd, udev, NULL, 0, false, __func__); |
2a8f82c4 SS |
3151 | if (ret <= 0) |
3152 | return ret; | |
3153 | xhci = hcd_to_xhci(hcd); | |
3154 | slot_id = udev->slot_id; | |
3155 | virt_dev = xhci->devs[slot_id]; | |
f0615c45 AX |
3156 | if (!virt_dev) { |
3157 | xhci_dbg(xhci, "The device to be reset with slot ID %u does " | |
3158 | "not exist. Re-allocate the device\n", slot_id); | |
3159 | ret = xhci_alloc_dev(hcd, udev); | |
3160 | if (ret == 1) | |
3161 | return 0; | |
3162 | else | |
3163 | return -EINVAL; | |
3164 | } | |
3165 | ||
3166 | if (virt_dev->udev != udev) { | |
3167 | /* If the virt_dev and the udev does not match, this virt_dev | |
3168 | * may belong to another udev. | |
3169 | * Re-allocate the device. | |
3170 | */ | |
3171 | xhci_dbg(xhci, "The device to be reset with slot ID %u does " | |
3172 | "not match the udev. Re-allocate the device\n", | |
3173 | slot_id); | |
3174 | ret = xhci_alloc_dev(hcd, udev); | |
3175 | if (ret == 1) | |
3176 | return 0; | |
3177 | else | |
3178 | return -EINVAL; | |
3179 | } | |
2a8f82c4 | 3180 | |
001fd382 ML |
3181 | /* If device is not setup, there is no point in resetting it */ |
3182 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); | |
3183 | if (GET_SLOT_STATE(le32_to_cpu(slot_ctx->dev_state)) == | |
3184 | SLOT_STATE_DISABLED) | |
3185 | return 0; | |
3186 | ||
2a8f82c4 SS |
3187 | xhci_dbg(xhci, "Resetting device with slot ID %u\n", slot_id); |
3188 | /* Allocate the command structure that holds the struct completion. | |
3189 | * Assume we're in process context, since the normal device reset | |
3190 | * process has to wait for the device anyway. Storage devices are | |
3191 | * reset as part of error handling, so use GFP_NOIO instead of | |
3192 | * GFP_KERNEL. | |
3193 | */ | |
3194 | reset_device_cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO); | |
3195 | if (!reset_device_cmd) { | |
3196 | xhci_dbg(xhci, "Couldn't allocate command structure.\n"); | |
3197 | return -ENOMEM; | |
3198 | } | |
3199 | ||
3200 | /* Attempt to submit the Reset Device command to the command ring */ | |
3201 | spin_lock_irqsave(&xhci->lock, flags); | |
3202 | reset_device_cmd->command_trb = xhci->cmd_ring->enqueue; | |
7a3783ef PZ |
3203 | |
3204 | /* Enqueue pointer can be left pointing to the link TRB, | |
3205 | * we must handle that | |
3206 | */ | |
f5960b69 | 3207 | if (TRB_TYPE_LINK_LE32(reset_device_cmd->command_trb->link.control)) |
7a3783ef PZ |
3208 | reset_device_cmd->command_trb = |
3209 | xhci->cmd_ring->enq_seg->next->trbs; | |
3210 | ||
2a8f82c4 SS |
3211 | list_add_tail(&reset_device_cmd->cmd_list, &virt_dev->cmd_list); |
3212 | ret = xhci_queue_reset_device(xhci, slot_id); | |
3213 | if (ret) { | |
3214 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
3215 | list_del(&reset_device_cmd->cmd_list); | |
3216 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3217 | goto command_cleanup; | |
3218 | } | |
3219 | xhci_ring_cmd_db(xhci); | |
3220 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3221 | ||
3222 | /* Wait for the Reset Device command to finish */ | |
3223 | timeleft = wait_for_completion_interruptible_timeout( | |
3224 | reset_device_cmd->completion, | |
3225 | USB_CTRL_SET_TIMEOUT); | |
3226 | if (timeleft <= 0) { | |
3227 | xhci_warn(xhci, "%s while waiting for reset device command\n", | |
3228 | timeleft == 0 ? "Timeout" : "Signal"); | |
3229 | spin_lock_irqsave(&xhci->lock, flags); | |
3230 | /* The timeout might have raced with the event ring handler, so | |
3231 | * only delete from the list if the item isn't poisoned. | |
3232 | */ | |
3233 | if (reset_device_cmd->cmd_list.next != LIST_POISON1) | |
3234 | list_del(&reset_device_cmd->cmd_list); | |
3235 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3236 | ret = -ETIME; | |
3237 | goto command_cleanup; | |
3238 | } | |
3239 | ||
3240 | /* The Reset Device command can't fail, according to the 0.95/0.96 spec, | |
3241 | * unless we tried to reset a slot ID that wasn't enabled, | |
3242 | * or the device wasn't in the addressed or configured state. | |
3243 | */ | |
3244 | ret = reset_device_cmd->status; | |
3245 | switch (ret) { | |
3246 | case COMP_EBADSLT: /* 0.95 completion code for bad slot ID */ | |
3247 | case COMP_CTX_STATE: /* 0.96 completion code for same thing */ | |
3248 | xhci_info(xhci, "Can't reset device (slot ID %u) in %s state\n", | |
3249 | slot_id, | |
3250 | xhci_get_slot_state(xhci, virt_dev->out_ctx)); | |
3251 | xhci_info(xhci, "Not freeing device rings.\n"); | |
3252 | /* Don't treat this as an error. May change my mind later. */ | |
3253 | ret = 0; | |
3254 | goto command_cleanup; | |
3255 | case COMP_SUCCESS: | |
3256 | xhci_dbg(xhci, "Successful reset device command.\n"); | |
3257 | break; | |
3258 | default: | |
3259 | if (xhci_is_vendor_info_code(xhci, ret)) | |
3260 | break; | |
3261 | xhci_warn(xhci, "Unknown completion code %u for " | |
3262 | "reset device command.\n", ret); | |
3263 | ret = -EINVAL; | |
3264 | goto command_cleanup; | |
3265 | } | |
3266 | ||
2cf95c18 SS |
3267 | /* Free up host controller endpoint resources */ |
3268 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { | |
3269 | spin_lock_irqsave(&xhci->lock, flags); | |
3270 | /* Don't delete the default control endpoint resources */ | |
3271 | xhci_free_device_endpoint_resources(xhci, virt_dev, false); | |
3272 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3273 | } | |
3274 | ||
2a8f82c4 SS |
3275 | /* Everything but endpoint 0 is disabled, so free or cache the rings. */ |
3276 | last_freed_endpoint = 1; | |
3277 | for (i = 1; i < 31; ++i) { | |
2dea75d9 DT |
3278 | struct xhci_virt_ep *ep = &virt_dev->eps[i]; |
3279 | ||
3280 | if (ep->ep_state & EP_HAS_STREAMS) { | |
3281 | xhci_free_stream_info(xhci, ep->stream_info); | |
3282 | ep->stream_info = NULL; | |
3283 | ep->ep_state &= ~EP_HAS_STREAMS; | |
3284 | } | |
3285 | ||
3286 | if (ep->ring) { | |
3287 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); | |
3288 | last_freed_endpoint = i; | |
3289 | } | |
2e27980e SS |
3290 | if (!list_empty(&virt_dev->eps[i].bw_endpoint_list)) |
3291 | xhci_drop_ep_from_interval_table(xhci, | |
3292 | &virt_dev->eps[i].bw_info, | |
3293 | virt_dev->bw_table, | |
3294 | udev, | |
3295 | &virt_dev->eps[i], | |
3296 | virt_dev->tt_info); | |
9af5d71d | 3297 | xhci_clear_endpoint_bw_info(&virt_dev->eps[i].bw_info); |
2a8f82c4 | 3298 | } |
2e27980e SS |
3299 | /* If necessary, update the number of active TTs on this root port */ |
3300 | xhci_update_tt_active_eps(xhci, virt_dev, old_active_eps); | |
3301 | ||
2a8f82c4 SS |
3302 | xhci_dbg(xhci, "Output context after successful reset device cmd:\n"); |
3303 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, last_freed_endpoint); | |
3304 | ret = 0; | |
3305 | ||
3306 | command_cleanup: | |
3307 | xhci_free_command(xhci, reset_device_cmd); | |
3308 | return ret; | |
3309 | } | |
3310 | ||
3ffbba95 SS |
3311 | /* |
3312 | * At this point, the struct usb_device is about to go away, the device has | |
3313 | * disconnected, and all traffic has been stopped and the endpoints have been | |
3314 | * disabled. Free any HC data structures associated with that device. | |
3315 | */ | |
3316 | void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev) | |
3317 | { | |
3318 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
6f5165cf | 3319 | struct xhci_virt_device *virt_dev; |
3ffbba95 | 3320 | unsigned long flags; |
c526d0d4 | 3321 | u32 state; |
64927730 | 3322 | int i, ret; |
3ffbba95 | 3323 | |
64927730 | 3324 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
7bd89b40 SS |
3325 | /* If the host is halted due to driver unload, we still need to free the |
3326 | * device. | |
3327 | */ | |
3328 | if (ret <= 0 && ret != -ENODEV) | |
3ffbba95 | 3329 | return; |
64927730 | 3330 | |
6f5165cf | 3331 | virt_dev = xhci->devs[udev->slot_id]; |
6f5165cf SS |
3332 | |
3333 | /* Stop any wayward timer functions (which may grab the lock) */ | |
3334 | for (i = 0; i < 31; ++i) { | |
3335 | virt_dev->eps[i].ep_state &= ~EP_HALT_PENDING; | |
3336 | del_timer_sync(&virt_dev->eps[i].stop_cmd_timer); | |
3337 | } | |
3ffbba95 | 3338 | |
65580b43 AX |
3339 | if (udev->usb2_hw_lpm_enabled) { |
3340 | xhci_set_usb2_hardware_lpm(hcd, udev, 0); | |
3341 | udev->usb2_hw_lpm_enabled = 0; | |
3342 | } | |
3343 | ||
3ffbba95 | 3344 | spin_lock_irqsave(&xhci->lock, flags); |
c526d0d4 SS |
3345 | /* Don't disable the slot if the host controller is dead. */ |
3346 | state = xhci_readl(xhci, &xhci->op_regs->status); | |
7bd89b40 SS |
3347 | if (state == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING) || |
3348 | (xhci->xhc_state & XHCI_STATE_HALTED)) { | |
c526d0d4 SS |
3349 | xhci_free_virt_device(xhci, udev->slot_id); |
3350 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3351 | return; | |
3352 | } | |
3353 | ||
23e3be11 | 3354 | if (xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) { |
3ffbba95 SS |
3355 | spin_unlock_irqrestore(&xhci->lock, flags); |
3356 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
3357 | return; | |
3358 | } | |
23e3be11 | 3359 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
3360 | spin_unlock_irqrestore(&xhci->lock, flags); |
3361 | /* | |
3362 | * Event command completion handler will free any data structures | |
f88ba78d | 3363 | * associated with the slot. XXX Can free sleep? |
3ffbba95 SS |
3364 | */ |
3365 | } | |
3366 | ||
2cf95c18 SS |
3367 | /* |
3368 | * Checks if we have enough host controller resources for the default control | |
3369 | * endpoint. | |
3370 | * | |
3371 | * Must be called with xhci->lock held. | |
3372 | */ | |
3373 | static int xhci_reserve_host_control_ep_resources(struct xhci_hcd *xhci) | |
3374 | { | |
3375 | if (xhci->num_active_eps + 1 > xhci->limit_active_eps) { | |
3376 | xhci_dbg(xhci, "Not enough ep ctxs: " | |
3377 | "%u active, need to add 1, limit is %u.\n", | |
3378 | xhci->num_active_eps, xhci->limit_active_eps); | |
3379 | return -ENOMEM; | |
3380 | } | |
3381 | xhci->num_active_eps += 1; | |
3382 | xhci_dbg(xhci, "Adding 1 ep ctx, %u now active.\n", | |
3383 | xhci->num_active_eps); | |
3384 | return 0; | |
3385 | } | |
3386 | ||
3387 | ||
3ffbba95 SS |
3388 | /* |
3389 | * Returns 0 if the xHC ran out of device slots, the Enable Slot command | |
3390 | * timed out, or allocating memory failed. Returns 1 on success. | |
3391 | */ | |
3392 | int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev) | |
3393 | { | |
3394 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
3395 | unsigned long flags; | |
3396 | int timeleft; | |
3397 | int ret; | |
3398 | ||
3399 | spin_lock_irqsave(&xhci->lock, flags); | |
23e3be11 | 3400 | ret = xhci_queue_slot_control(xhci, TRB_ENABLE_SLOT, 0); |
3ffbba95 SS |
3401 | if (ret) { |
3402 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3403 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
3404 | return 0; | |
3405 | } | |
23e3be11 | 3406 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
3407 | spin_unlock_irqrestore(&xhci->lock, flags); |
3408 | ||
3409 | /* XXX: how much time for xHC slot assignment? */ | |
3410 | timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, | |
3411 | USB_CTRL_SET_TIMEOUT); | |
3412 | if (timeleft <= 0) { | |
3413 | xhci_warn(xhci, "%s while waiting for a slot\n", | |
3414 | timeleft == 0 ? "Timeout" : "Signal"); | |
3415 | /* FIXME cancel the enable slot request */ | |
3416 | return 0; | |
3417 | } | |
3418 | ||
3ffbba95 SS |
3419 | if (!xhci->slot_id) { |
3420 | xhci_err(xhci, "Error while assigning device slot ID\n"); | |
3ffbba95 SS |
3421 | return 0; |
3422 | } | |
2cf95c18 SS |
3423 | |
3424 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { | |
3425 | spin_lock_irqsave(&xhci->lock, flags); | |
3426 | ret = xhci_reserve_host_control_ep_resources(xhci); | |
3427 | if (ret) { | |
3428 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3429 | xhci_warn(xhci, "Not enough host resources, " | |
3430 | "active endpoint contexts = %u\n", | |
3431 | xhci->num_active_eps); | |
3432 | goto disable_slot; | |
3433 | } | |
3434 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3435 | } | |
3436 | /* Use GFP_NOIO, since this function can be called from | |
a6d940dd SS |
3437 | * xhci_discover_or_reset_device(), which may be called as part of |
3438 | * mass storage driver error handling. | |
3439 | */ | |
3440 | if (!xhci_alloc_virt_device(xhci, xhci->slot_id, udev, GFP_NOIO)) { | |
3ffbba95 | 3441 | xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n"); |
2cf95c18 | 3442 | goto disable_slot; |
3ffbba95 SS |
3443 | } |
3444 | udev->slot_id = xhci->slot_id; | |
3445 | /* Is this a LS or FS device under a HS hub? */ | |
3446 | /* Hub or peripherial? */ | |
3ffbba95 | 3447 | return 1; |
2cf95c18 SS |
3448 | |
3449 | disable_slot: | |
3450 | /* Disable slot, if we can do it without mem alloc */ | |
3451 | spin_lock_irqsave(&xhci->lock, flags); | |
3452 | if (!xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) | |
3453 | xhci_ring_cmd_db(xhci); | |
3454 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3455 | return 0; | |
3ffbba95 SS |
3456 | } |
3457 | ||
3458 | /* | |
3459 | * Issue an Address Device command (which will issue a SetAddress request to | |
3460 | * the device). | |
3461 | * We should be protected by the usb_address0_mutex in khubd's hub_port_init, so | |
3462 | * we should only issue and wait on one address command at the same time. | |
3463 | * | |
3464 | * We add one to the device address issued by the hardware because the USB core | |
3465 | * uses address 1 for the root hubs (even though they're not really devices). | |
3466 | */ | |
3467 | int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) | |
3468 | { | |
3469 | unsigned long flags; | |
3470 | int timeleft; | |
3471 | struct xhci_virt_device *virt_dev; | |
3472 | int ret = 0; | |
3473 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
d115b048 JY |
3474 | struct xhci_slot_ctx *slot_ctx; |
3475 | struct xhci_input_control_ctx *ctrl_ctx; | |
8e595a5d | 3476 | u64 temp_64; |
3ffbba95 SS |
3477 | |
3478 | if (!udev->slot_id) { | |
3479 | xhci_dbg(xhci, "Bad Slot ID %d\n", udev->slot_id); | |
3480 | return -EINVAL; | |
3481 | } | |
3482 | ||
3ffbba95 SS |
3483 | virt_dev = xhci->devs[udev->slot_id]; |
3484 | ||
7ed603ec ME |
3485 | if (WARN_ON(!virt_dev)) { |
3486 | /* | |
3487 | * In plug/unplug torture test with an NEC controller, | |
3488 | * a zero-dereference was observed once due to virt_dev = 0. | |
3489 | * Print useful debug rather than crash if it is observed again! | |
3490 | */ | |
3491 | xhci_warn(xhci, "Virt dev invalid for slot_id 0x%x!\n", | |
3492 | udev->slot_id); | |
3493 | return -EINVAL; | |
3494 | } | |
3495 | ||
f0615c45 AX |
3496 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
3497 | /* | |
3498 | * If this is the first Set Address since device plug-in or | |
3499 | * virt_device realloaction after a resume with an xHCI power loss, | |
3500 | * then set up the slot context. | |
3501 | */ | |
3502 | if (!slot_ctx->dev_info) | |
3ffbba95 | 3503 | xhci_setup_addressable_virt_dev(xhci, udev); |
f0615c45 | 3504 | /* Otherwise, update the control endpoint ring enqueue pointer. */ |
2d1ee590 SS |
3505 | else |
3506 | xhci_copy_ep0_dequeue_into_input_ctx(xhci, udev); | |
66e49d87 | 3507 | xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); |
d115b048 | 3508 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); |
3ffbba95 | 3509 | |
f88ba78d | 3510 | spin_lock_irqsave(&xhci->lock, flags); |
d115b048 JY |
3511 | ret = xhci_queue_address_device(xhci, virt_dev->in_ctx->dma, |
3512 | udev->slot_id); | |
3ffbba95 SS |
3513 | if (ret) { |
3514 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3515 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
3516 | return ret; | |
3517 | } | |
23e3be11 | 3518 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
3519 | spin_unlock_irqrestore(&xhci->lock, flags); |
3520 | ||
3521 | /* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */ | |
3522 | timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, | |
3523 | USB_CTRL_SET_TIMEOUT); | |
3524 | /* FIXME: From section 4.3.4: "Software shall be responsible for timing | |
3525 | * the SetAddress() "recovery interval" required by USB and aborting the | |
3526 | * command on a timeout. | |
3527 | */ | |
3528 | if (timeleft <= 0) { | |
cd68176a | 3529 | xhci_warn(xhci, "%s while waiting for address device command\n", |
3ffbba95 SS |
3530 | timeleft == 0 ? "Timeout" : "Signal"); |
3531 | /* FIXME cancel the address device command */ | |
3532 | return -ETIME; | |
3533 | } | |
3534 | ||
3ffbba95 SS |
3535 | switch (virt_dev->cmd_status) { |
3536 | case COMP_CTX_STATE: | |
3537 | case COMP_EBADSLT: | |
3538 | xhci_err(xhci, "Setup ERROR: address device command for slot %d.\n", | |
3539 | udev->slot_id); | |
3540 | ret = -EINVAL; | |
3541 | break; | |
3542 | case COMP_TX_ERR: | |
3543 | dev_warn(&udev->dev, "Device not responding to set address.\n"); | |
3544 | ret = -EPROTO; | |
3545 | break; | |
f6ba6fe2 AH |
3546 | case COMP_DEV_ERR: |
3547 | dev_warn(&udev->dev, "ERROR: Incompatible device for address " | |
3548 | "device command.\n"); | |
3549 | ret = -ENODEV; | |
3550 | break; | |
3ffbba95 SS |
3551 | case COMP_SUCCESS: |
3552 | xhci_dbg(xhci, "Successful Address Device command\n"); | |
3553 | break; | |
3554 | default: | |
3555 | xhci_err(xhci, "ERROR: unexpected command completion " | |
3556 | "code 0x%x.\n", virt_dev->cmd_status); | |
66e49d87 | 3557 | xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); |
d115b048 | 3558 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); |
3ffbba95 SS |
3559 | ret = -EINVAL; |
3560 | break; | |
3561 | } | |
3562 | if (ret) { | |
3ffbba95 SS |
3563 | return ret; |
3564 | } | |
8e595a5d SS |
3565 | temp_64 = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); |
3566 | xhci_dbg(xhci, "Op regs DCBAA ptr = %#016llx\n", temp_64); | |
3567 | xhci_dbg(xhci, "Slot ID %d dcbaa entry @%p = %#016llx\n", | |
28ccd296 ME |
3568 | udev->slot_id, |
3569 | &xhci->dcbaa->dev_context_ptrs[udev->slot_id], | |
3570 | (unsigned long long) | |
3571 | le64_to_cpu(xhci->dcbaa->dev_context_ptrs[udev->slot_id])); | |
700e2052 | 3572 | xhci_dbg(xhci, "Output Context DMA address = %#08llx\n", |
d115b048 | 3573 | (unsigned long long)virt_dev->out_ctx->dma); |
3ffbba95 | 3574 | xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); |
d115b048 | 3575 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); |
3ffbba95 | 3576 | xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); |
d115b048 | 3577 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); |
3ffbba95 SS |
3578 | /* |
3579 | * USB core uses address 1 for the roothubs, so we add one to the | |
3580 | * address given back to us by the HC. | |
3581 | */ | |
d115b048 | 3582 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); |
c8d4af8e AX |
3583 | /* Use kernel assigned address for devices; store xHC assigned |
3584 | * address locally. */ | |
28ccd296 ME |
3585 | virt_dev->address = (le32_to_cpu(slot_ctx->dev_state) & DEV_ADDR_MASK) |
3586 | + 1; | |
f94e0186 | 3587 | /* Zero the input context control for later use */ |
d115b048 JY |
3588 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
3589 | ctrl_ctx->add_flags = 0; | |
3590 | ctrl_ctx->drop_flags = 0; | |
3ffbba95 | 3591 | |
c8d4af8e | 3592 | xhci_dbg(xhci, "Internal device address = %d\n", virt_dev->address); |
3ffbba95 SS |
3593 | |
3594 | return 0; | |
3595 | } | |
3596 | ||
9574323c AX |
3597 | #ifdef CONFIG_USB_SUSPEND |
3598 | ||
3599 | /* BESL to HIRD Encoding array for USB2 LPM */ | |
3600 | static int xhci_besl_encoding[16] = {125, 150, 200, 300, 400, 500, 1000, 2000, | |
3601 | 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000}; | |
3602 | ||
3603 | /* Calculate HIRD/BESL for USB2 PORTPMSC*/ | |
3604 | static int xhci_calculate_hird_besl(int u2del, bool use_besl) | |
3605 | { | |
3606 | int hird; | |
3607 | ||
3608 | if (use_besl) { | |
3609 | for (hird = 0; hird < 16; hird++) { | |
3610 | if (xhci_besl_encoding[hird] >= u2del) | |
3611 | break; | |
3612 | } | |
3613 | } else { | |
3614 | if (u2del <= 50) | |
3615 | hird = 0; | |
3616 | else | |
3617 | hird = (u2del - 51) / 75 + 1; | |
3618 | ||
3619 | if (hird > 15) | |
3620 | hird = 15; | |
3621 | } | |
3622 | ||
3623 | return hird; | |
3624 | } | |
3625 | ||
3626 | static int xhci_usb2_software_lpm_test(struct usb_hcd *hcd, | |
3627 | struct usb_device *udev) | |
3628 | { | |
3629 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
3630 | struct dev_info *dev_info; | |
3631 | __le32 __iomem **port_array; | |
3632 | __le32 __iomem *addr, *pm_addr; | |
3633 | u32 temp, dev_id; | |
3634 | unsigned int port_num; | |
3635 | unsigned long flags; | |
3636 | int u2del, hird; | |
3637 | int ret; | |
3638 | ||
3639 | if (hcd->speed == HCD_USB3 || !xhci->sw_lpm_support || | |
3640 | !udev->lpm_capable) | |
3641 | return -EINVAL; | |
3642 | ||
3643 | /* we only support lpm for non-hub device connected to root hub yet */ | |
3644 | if (!udev->parent || udev->parent->parent || | |
3645 | udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
3646 | return -EINVAL; | |
3647 | ||
3648 | spin_lock_irqsave(&xhci->lock, flags); | |
3649 | ||
3650 | /* Look for devices in lpm_failed_devs list */ | |
3651 | dev_id = le16_to_cpu(udev->descriptor.idVendor) << 16 | | |
3652 | le16_to_cpu(udev->descriptor.idProduct); | |
3653 | list_for_each_entry(dev_info, &xhci->lpm_failed_devs, list) { | |
3654 | if (dev_info->dev_id == dev_id) { | |
3655 | ret = -EINVAL; | |
3656 | goto finish; | |
3657 | } | |
3658 | } | |
3659 | ||
3660 | port_array = xhci->usb2_ports; | |
3661 | port_num = udev->portnum - 1; | |
3662 | ||
3663 | if (port_num > HCS_MAX_PORTS(xhci->hcs_params1)) { | |
3664 | xhci_dbg(xhci, "invalid port number %d\n", udev->portnum); | |
3665 | ret = -EINVAL; | |
3666 | goto finish; | |
3667 | } | |
3668 | ||
3669 | /* | |
3670 | * Test USB 2.0 software LPM. | |
3671 | * FIXME: some xHCI 1.0 hosts may implement a new register to set up | |
3672 | * hardware-controlled USB 2.0 LPM. See section 5.4.11 and 4.23.5.1.1.1 | |
3673 | * in the June 2011 errata release. | |
3674 | */ | |
3675 | xhci_dbg(xhci, "test port %d software LPM\n", port_num); | |
3676 | /* | |
3677 | * Set L1 Device Slot and HIRD/BESL. | |
3678 | * Check device's USB 2.0 extension descriptor to determine whether | |
3679 | * HIRD or BESL shoule be used. See USB2.0 LPM errata. | |
3680 | */ | |
3681 | pm_addr = port_array[port_num] + 1; | |
3682 | u2del = HCS_U2_LATENCY(xhci->hcs_params3); | |
3683 | if (le32_to_cpu(udev->bos->ext_cap->bmAttributes) & (1 << 2)) | |
3684 | hird = xhci_calculate_hird_besl(u2del, 1); | |
3685 | else | |
3686 | hird = xhci_calculate_hird_besl(u2del, 0); | |
3687 | ||
3688 | temp = PORT_L1DS(udev->slot_id) | PORT_HIRD(hird); | |
3689 | xhci_writel(xhci, temp, pm_addr); | |
3690 | ||
3691 | /* Set port link state to U2(L1) */ | |
3692 | addr = port_array[port_num]; | |
3693 | xhci_set_link_state(xhci, port_array, port_num, XDEV_U2); | |
3694 | ||
3695 | /* wait for ACK */ | |
3696 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3697 | msleep(10); | |
3698 | spin_lock_irqsave(&xhci->lock, flags); | |
3699 | ||
3700 | /* Check L1 Status */ | |
3701 | ret = handshake(xhci, pm_addr, PORT_L1S_MASK, PORT_L1S_SUCCESS, 125); | |
3702 | if (ret != -ETIMEDOUT) { | |
3703 | /* enter L1 successfully */ | |
3704 | temp = xhci_readl(xhci, addr); | |
3705 | xhci_dbg(xhci, "port %d entered L1 state, port status 0x%x\n", | |
3706 | port_num, temp); | |
3707 | ret = 0; | |
3708 | } else { | |
3709 | temp = xhci_readl(xhci, pm_addr); | |
3710 | xhci_dbg(xhci, "port %d software lpm failed, L1 status %d\n", | |
3711 | port_num, temp & PORT_L1S_MASK); | |
3712 | ret = -EINVAL; | |
3713 | } | |
3714 | ||
3715 | /* Resume the port */ | |
3716 | xhci_set_link_state(xhci, port_array, port_num, XDEV_U0); | |
3717 | ||
3718 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3719 | msleep(10); | |
3720 | spin_lock_irqsave(&xhci->lock, flags); | |
3721 | ||
3722 | /* Clear PLC */ | |
3723 | xhci_test_and_clear_bit(xhci, port_array, port_num, PORT_PLC); | |
3724 | ||
3725 | /* Check PORTSC to make sure the device is in the right state */ | |
3726 | if (!ret) { | |
3727 | temp = xhci_readl(xhci, addr); | |
3728 | xhci_dbg(xhci, "resumed port %d status 0x%x\n", port_num, temp); | |
3729 | if (!(temp & PORT_CONNECT) || !(temp & PORT_PE) || | |
3730 | (temp & PORT_PLS_MASK) != XDEV_U0) { | |
3731 | xhci_dbg(xhci, "port L1 resume fail\n"); | |
3732 | ret = -EINVAL; | |
3733 | } | |
3734 | } | |
3735 | ||
3736 | if (ret) { | |
3737 | /* Insert dev to lpm_failed_devs list */ | |
3738 | xhci_warn(xhci, "device LPM test failed, may disconnect and " | |
3739 | "re-enumerate\n"); | |
3740 | dev_info = kzalloc(sizeof(struct dev_info), GFP_ATOMIC); | |
3741 | if (!dev_info) { | |
3742 | ret = -ENOMEM; | |
3743 | goto finish; | |
3744 | } | |
3745 | dev_info->dev_id = dev_id; | |
3746 | INIT_LIST_HEAD(&dev_info->list); | |
3747 | list_add(&dev_info->list, &xhci->lpm_failed_devs); | |
3748 | } else { | |
3749 | xhci_ring_device(xhci, udev->slot_id); | |
3750 | } | |
3751 | ||
3752 | finish: | |
3753 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3754 | return ret; | |
3755 | } | |
3756 | ||
65580b43 AX |
3757 | int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd, |
3758 | struct usb_device *udev, int enable) | |
3759 | { | |
3760 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
3761 | __le32 __iomem **port_array; | |
3762 | __le32 __iomem *pm_addr; | |
3763 | u32 temp; | |
3764 | unsigned int port_num; | |
3765 | unsigned long flags; | |
3766 | int u2del, hird; | |
3767 | ||
3768 | if (hcd->speed == HCD_USB3 || !xhci->hw_lpm_support || | |
3769 | !udev->lpm_capable) | |
3770 | return -EPERM; | |
3771 | ||
3772 | if (!udev->parent || udev->parent->parent || | |
3773 | udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
3774 | return -EPERM; | |
3775 | ||
3776 | if (udev->usb2_hw_lpm_capable != 1) | |
3777 | return -EPERM; | |
3778 | ||
3779 | spin_lock_irqsave(&xhci->lock, flags); | |
3780 | ||
3781 | port_array = xhci->usb2_ports; | |
3782 | port_num = udev->portnum - 1; | |
3783 | pm_addr = port_array[port_num] + 1; | |
3784 | temp = xhci_readl(xhci, pm_addr); | |
3785 | ||
3786 | xhci_dbg(xhci, "%s port %d USB2 hardware LPM\n", | |
3787 | enable ? "enable" : "disable", port_num); | |
3788 | ||
3789 | u2del = HCS_U2_LATENCY(xhci->hcs_params3); | |
3790 | if (le32_to_cpu(udev->bos->ext_cap->bmAttributes) & (1 << 2)) | |
3791 | hird = xhci_calculate_hird_besl(u2del, 1); | |
3792 | else | |
3793 | hird = xhci_calculate_hird_besl(u2del, 0); | |
3794 | ||
3795 | if (enable) { | |
3796 | temp &= ~PORT_HIRD_MASK; | |
3797 | temp |= PORT_HIRD(hird) | PORT_RWE; | |
3798 | xhci_writel(xhci, temp, pm_addr); | |
3799 | temp = xhci_readl(xhci, pm_addr); | |
3800 | temp |= PORT_HLE; | |
3801 | xhci_writel(xhci, temp, pm_addr); | |
3802 | } else { | |
3803 | temp &= ~(PORT_HLE | PORT_RWE | PORT_HIRD_MASK); | |
3804 | xhci_writel(xhci, temp, pm_addr); | |
3805 | } | |
3806 | ||
3807 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3808 | return 0; | |
3809 | } | |
3810 | ||
9574323c AX |
3811 | int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev) |
3812 | { | |
3813 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
3814 | int ret; | |
3815 | ||
3816 | ret = xhci_usb2_software_lpm_test(hcd, udev); | |
65580b43 | 3817 | if (!ret) { |
9574323c | 3818 | xhci_dbg(xhci, "software LPM test succeed\n"); |
65580b43 AX |
3819 | if (xhci->hw_lpm_support == 1) { |
3820 | udev->usb2_hw_lpm_capable = 1; | |
3821 | ret = xhci_set_usb2_hardware_lpm(hcd, udev, 1); | |
3822 | if (!ret) | |
3823 | udev->usb2_hw_lpm_enabled = 1; | |
3824 | } | |
3825 | } | |
9574323c AX |
3826 | |
3827 | return 0; | |
3828 | } | |
3829 | ||
3830 | #else | |
3831 | ||
65580b43 AX |
3832 | int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd, |
3833 | struct usb_device *udev, int enable) | |
3834 | { | |
3835 | return 0; | |
3836 | } | |
3837 | ||
9574323c AX |
3838 | int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev) |
3839 | { | |
3840 | return 0; | |
3841 | } | |
3842 | ||
3843 | #endif /* CONFIG_USB_SUSPEND */ | |
3844 | ||
ac1c1b7f SS |
3845 | /* Once a hub descriptor is fetched for a device, we need to update the xHC's |
3846 | * internal data structures for the device. | |
3847 | */ | |
3848 | int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev, | |
3849 | struct usb_tt *tt, gfp_t mem_flags) | |
3850 | { | |
3851 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
3852 | struct xhci_virt_device *vdev; | |
3853 | struct xhci_command *config_cmd; | |
3854 | struct xhci_input_control_ctx *ctrl_ctx; | |
3855 | struct xhci_slot_ctx *slot_ctx; | |
3856 | unsigned long flags; | |
3857 | unsigned think_time; | |
3858 | int ret; | |
3859 | ||
3860 | /* Ignore root hubs */ | |
3861 | if (!hdev->parent) | |
3862 | return 0; | |
3863 | ||
3864 | vdev = xhci->devs[hdev->slot_id]; | |
3865 | if (!vdev) { | |
3866 | xhci_warn(xhci, "Cannot update hub desc for unknown device.\n"); | |
3867 | return -EINVAL; | |
3868 | } | |
a1d78c16 | 3869 | config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); |
ac1c1b7f SS |
3870 | if (!config_cmd) { |
3871 | xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); | |
3872 | return -ENOMEM; | |
3873 | } | |
3874 | ||
3875 | spin_lock_irqsave(&xhci->lock, flags); | |
839c817c SS |
3876 | if (hdev->speed == USB_SPEED_HIGH && |
3877 | xhci_alloc_tt_info(xhci, vdev, hdev, tt, GFP_ATOMIC)) { | |
3878 | xhci_dbg(xhci, "Could not allocate xHCI TT structure.\n"); | |
3879 | xhci_free_command(xhci, config_cmd); | |
3880 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3881 | return -ENOMEM; | |
3882 | } | |
3883 | ||
ac1c1b7f SS |
3884 | xhci_slot_copy(xhci, config_cmd->in_ctx, vdev->out_ctx); |
3885 | ctrl_ctx = xhci_get_input_control_ctx(xhci, config_cmd->in_ctx); | |
28ccd296 | 3886 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
ac1c1b7f | 3887 | slot_ctx = xhci_get_slot_ctx(xhci, config_cmd->in_ctx); |
28ccd296 | 3888 | slot_ctx->dev_info |= cpu_to_le32(DEV_HUB); |
ac1c1b7f | 3889 | if (tt->multi) |
28ccd296 | 3890 | slot_ctx->dev_info |= cpu_to_le32(DEV_MTT); |
ac1c1b7f SS |
3891 | if (xhci->hci_version > 0x95) { |
3892 | xhci_dbg(xhci, "xHCI version %x needs hub " | |
3893 | "TT think time and number of ports\n", | |
3894 | (unsigned int) xhci->hci_version); | |
28ccd296 | 3895 | slot_ctx->dev_info2 |= cpu_to_le32(XHCI_MAX_PORTS(hdev->maxchild)); |
ac1c1b7f SS |
3896 | /* Set TT think time - convert from ns to FS bit times. |
3897 | * 0 = 8 FS bit times, 1 = 16 FS bit times, | |
3898 | * 2 = 24 FS bit times, 3 = 32 FS bit times. | |
700b4173 AX |
3899 | * |
3900 | * xHCI 1.0: this field shall be 0 if the device is not a | |
3901 | * High-spped hub. | |
ac1c1b7f SS |
3902 | */ |
3903 | think_time = tt->think_time; | |
3904 | if (think_time != 0) | |
3905 | think_time = (think_time / 666) - 1; | |
700b4173 AX |
3906 | if (xhci->hci_version < 0x100 || hdev->speed == USB_SPEED_HIGH) |
3907 | slot_ctx->tt_info |= | |
3908 | cpu_to_le32(TT_THINK_TIME(think_time)); | |
ac1c1b7f SS |
3909 | } else { |
3910 | xhci_dbg(xhci, "xHCI version %x doesn't need hub " | |
3911 | "TT think time or number of ports\n", | |
3912 | (unsigned int) xhci->hci_version); | |
3913 | } | |
3914 | slot_ctx->dev_state = 0; | |
3915 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3916 | ||
3917 | xhci_dbg(xhci, "Set up %s for hub device.\n", | |
3918 | (xhci->hci_version > 0x95) ? | |
3919 | "configure endpoint" : "evaluate context"); | |
3920 | xhci_dbg(xhci, "Slot %u Input Context:\n", hdev->slot_id); | |
3921 | xhci_dbg_ctx(xhci, config_cmd->in_ctx, 0); | |
3922 | ||
3923 | /* Issue and wait for the configure endpoint or | |
3924 | * evaluate context command. | |
3925 | */ | |
3926 | if (xhci->hci_version > 0x95) | |
3927 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, | |
3928 | false, false); | |
3929 | else | |
3930 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, | |
3931 | true, false); | |
3932 | ||
3933 | xhci_dbg(xhci, "Slot %u Output Context:\n", hdev->slot_id); | |
3934 | xhci_dbg_ctx(xhci, vdev->out_ctx, 0); | |
3935 | ||
3936 | xhci_free_command(xhci, config_cmd); | |
3937 | return ret; | |
3938 | } | |
3939 | ||
66d4eadd SS |
3940 | int xhci_get_frame(struct usb_hcd *hcd) |
3941 | { | |
3942 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
3943 | /* EHCI mods by the periodic size. Why? */ | |
3944 | return xhci_readl(xhci, &xhci->run_regs->microframe_index) >> 3; | |
3945 | } | |
3946 | ||
3947 | MODULE_DESCRIPTION(DRIVER_DESC); | |
3948 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
3949 | MODULE_LICENSE("GPL"); | |
3950 | ||
3951 | static int __init xhci_hcd_init(void) | |
3952 | { | |
3953 | #ifdef CONFIG_PCI | |
3954 | int retval = 0; | |
3955 | ||
3956 | retval = xhci_register_pci(); | |
3957 | ||
3958 | if (retval < 0) { | |
3959 | printk(KERN_DEBUG "Problem registering PCI driver."); | |
3960 | return retval; | |
3961 | } | |
3962 | #endif | |
98441973 SS |
3963 | /* |
3964 | * Check the compiler generated sizes of structures that must be laid | |
3965 | * out in specific ways for hardware access. | |
3966 | */ | |
3967 | BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8); | |
3968 | BUILD_BUG_ON(sizeof(struct xhci_slot_ctx) != 8*32/8); | |
3969 | BUILD_BUG_ON(sizeof(struct xhci_ep_ctx) != 8*32/8); | |
3970 | /* xhci_device_control has eight fields, and also | |
3971 | * embeds one xhci_slot_ctx and 31 xhci_ep_ctx | |
3972 | */ | |
98441973 SS |
3973 | BUILD_BUG_ON(sizeof(struct xhci_stream_ctx) != 4*32/8); |
3974 | BUILD_BUG_ON(sizeof(union xhci_trb) != 4*32/8); | |
3975 | BUILD_BUG_ON(sizeof(struct xhci_erst_entry) != 4*32/8); | |
3976 | BUILD_BUG_ON(sizeof(struct xhci_cap_regs) != 7*32/8); | |
3977 | BUILD_BUG_ON(sizeof(struct xhci_intr_reg) != 8*32/8); | |
3978 | /* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */ | |
3979 | BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8); | |
3980 | BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8); | |
66d4eadd SS |
3981 | return 0; |
3982 | } | |
3983 | module_init(xhci_hcd_init); | |
3984 | ||
3985 | static void __exit xhci_hcd_cleanup(void) | |
3986 | { | |
3987 | #ifdef CONFIG_PCI | |
3988 | xhci_unregister_pci(); | |
3989 | #endif | |
3990 | } | |
3991 | module_exit(xhci_hcd_cleanup); |