Commit | Line | Data |
---|---|---|
66d4eadd SS |
1 | /* |
2 | * xHCI host controller driver | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp. | |
5 | * | |
6 | * Author: Sarah Sharp | |
7 | * Some code borrowed from the Linux EHCI driver. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | * for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software Foundation, | |
20 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
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 | ||
43b86af8 DN |
178 | /* |
179 | * Free IRQs | |
180 | * free all IRQs request | |
181 | */ | |
182 | static void xhci_free_irq(struct xhci_hcd *xhci) | |
183 | { | |
184 | int i; | |
185 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); | |
186 | ||
187 | /* return if using legacy interrupt */ | |
188 | if (xhci_to_hcd(xhci)->irq >= 0) | |
189 | return; | |
190 | ||
191 | if (xhci->msix_entries) { | |
192 | for (i = 0; i < xhci->msix_count; i++) | |
193 | if (xhci->msix_entries[i].vector) | |
194 | free_irq(xhci->msix_entries[i].vector, | |
195 | xhci_to_hcd(xhci)); | |
196 | } else if (pdev->irq >= 0) | |
197 | free_irq(pdev->irq, xhci_to_hcd(xhci)); | |
198 | ||
199 | return; | |
200 | } | |
201 | ||
202 | /* | |
203 | * Set up MSI | |
204 | */ | |
205 | static int xhci_setup_msi(struct xhci_hcd *xhci) | |
66d4eadd SS |
206 | { |
207 | int ret; | |
43b86af8 DN |
208 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
209 | ||
210 | ret = pci_enable_msi(pdev); | |
211 | if (ret) { | |
212 | xhci_err(xhci, "failed to allocate MSI entry\n"); | |
213 | return ret; | |
214 | } | |
215 | ||
216 | ret = request_irq(pdev->irq, (irq_handler_t)xhci_msi_irq, | |
217 | 0, "xhci_hcd", xhci_to_hcd(xhci)); | |
218 | if (ret) { | |
219 | xhci_err(xhci, "disable MSI interrupt\n"); | |
220 | pci_disable_msi(pdev); | |
221 | } | |
222 | ||
223 | return ret; | |
224 | } | |
225 | ||
226 | /* | |
227 | * Set up MSI-X | |
228 | */ | |
229 | static int xhci_setup_msix(struct xhci_hcd *xhci) | |
230 | { | |
231 | int i, ret = 0; | |
0029227f AX |
232 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
233 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
66d4eadd | 234 | |
43b86af8 DN |
235 | /* |
236 | * calculate number of msi-x vectors supported. | |
237 | * - HCS_MAX_INTRS: the max number of interrupts the host can handle, | |
238 | * with max number of interrupters based on the xhci HCSPARAMS1. | |
239 | * - num_online_cpus: maximum msi-x vectors per CPUs core. | |
240 | * Add additional 1 vector to ensure always available interrupt. | |
241 | */ | |
242 | xhci->msix_count = min(num_online_cpus() + 1, | |
243 | HCS_MAX_INTRS(xhci->hcs_params1)); | |
244 | ||
245 | xhci->msix_entries = | |
246 | kmalloc((sizeof(struct msix_entry))*xhci->msix_count, | |
86871975 | 247 | GFP_KERNEL); |
66d4eadd SS |
248 | if (!xhci->msix_entries) { |
249 | xhci_err(xhci, "Failed to allocate MSI-X entries\n"); | |
250 | return -ENOMEM; | |
251 | } | |
43b86af8 DN |
252 | |
253 | for (i = 0; i < xhci->msix_count; i++) { | |
254 | xhci->msix_entries[i].entry = i; | |
255 | xhci->msix_entries[i].vector = 0; | |
256 | } | |
66d4eadd SS |
257 | |
258 | ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count); | |
259 | if (ret) { | |
260 | xhci_err(xhci, "Failed to enable MSI-X\n"); | |
261 | goto free_entries; | |
262 | } | |
263 | ||
43b86af8 DN |
264 | for (i = 0; i < xhci->msix_count; i++) { |
265 | ret = request_irq(xhci->msix_entries[i].vector, | |
266 | (irq_handler_t)xhci_msi_irq, | |
267 | 0, "xhci_hcd", xhci_to_hcd(xhci)); | |
268 | if (ret) | |
269 | goto disable_msix; | |
66d4eadd | 270 | } |
43b86af8 | 271 | |
0029227f | 272 | hcd->msix_enabled = 1; |
43b86af8 | 273 | return ret; |
66d4eadd SS |
274 | |
275 | disable_msix: | |
43b86af8 DN |
276 | xhci_err(xhci, "disable MSI-X interrupt\n"); |
277 | xhci_free_irq(xhci); | |
66d4eadd SS |
278 | pci_disable_msix(pdev); |
279 | free_entries: | |
280 | kfree(xhci->msix_entries); | |
281 | xhci->msix_entries = NULL; | |
282 | return ret; | |
283 | } | |
284 | ||
66d4eadd SS |
285 | /* Free any IRQs and disable MSI-X */ |
286 | static void xhci_cleanup_msix(struct xhci_hcd *xhci) | |
287 | { | |
0029227f AX |
288 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
289 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
66d4eadd | 290 | |
43b86af8 DN |
291 | xhci_free_irq(xhci); |
292 | ||
293 | if (xhci->msix_entries) { | |
294 | pci_disable_msix(pdev); | |
295 | kfree(xhci->msix_entries); | |
296 | xhci->msix_entries = NULL; | |
297 | } else { | |
298 | pci_disable_msi(pdev); | |
299 | } | |
300 | ||
0029227f | 301 | hcd->msix_enabled = 0; |
43b86af8 | 302 | return; |
66d4eadd | 303 | } |
66d4eadd SS |
304 | |
305 | /* | |
306 | * Initialize memory for HCD and xHC (one-time init). | |
307 | * | |
308 | * Program the PAGESIZE register, initialize the device context array, create | |
309 | * device contexts (?), set up a command ring segment (or two?), create event | |
310 | * ring (one for now). | |
311 | */ | |
312 | int xhci_init(struct usb_hcd *hcd) | |
313 | { | |
314 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
315 | int retval = 0; | |
316 | ||
317 | xhci_dbg(xhci, "xhci_init\n"); | |
318 | spin_lock_init(&xhci->lock); | |
b0567b3f SS |
319 | if (link_quirk) { |
320 | xhci_dbg(xhci, "QUIRK: Not clearing Link TRB chain bits.\n"); | |
321 | xhci->quirks |= XHCI_LINK_TRB_QUIRK; | |
322 | } else { | |
ac9d8fe7 | 323 | xhci_dbg(xhci, "xHCI doesn't need link TRB QUIRK\n"); |
b0567b3f | 324 | } |
66d4eadd SS |
325 | retval = xhci_mem_init(xhci, GFP_KERNEL); |
326 | xhci_dbg(xhci, "Finished xhci_init\n"); | |
327 | ||
328 | return retval; | |
329 | } | |
330 | ||
7f84eef0 SS |
331 | /*-------------------------------------------------------------------------*/ |
332 | ||
7f84eef0 SS |
333 | |
334 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING | |
8212a49d | 335 | static void xhci_event_ring_work(unsigned long arg) |
7f84eef0 SS |
336 | { |
337 | unsigned long flags; | |
338 | int temp; | |
8e595a5d | 339 | u64 temp_64; |
7f84eef0 SS |
340 | struct xhci_hcd *xhci = (struct xhci_hcd *) arg; |
341 | int i, j; | |
342 | ||
343 | xhci_dbg(xhci, "Poll event ring: %lu\n", jiffies); | |
344 | ||
345 | spin_lock_irqsave(&xhci->lock, flags); | |
346 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
347 | xhci_dbg(xhci, "op reg status = 0x%x\n", temp); | |
6f5165cf | 348 | if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) { |
e4ab05df SS |
349 | xhci_dbg(xhci, "HW died, polling stopped.\n"); |
350 | spin_unlock_irqrestore(&xhci->lock, flags); | |
351 | return; | |
352 | } | |
353 | ||
7f84eef0 SS |
354 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); |
355 | xhci_dbg(xhci, "ir_set 0 pending = 0x%x\n", temp); | |
7f84eef0 SS |
356 | xhci_dbg(xhci, "HC error bitmask = 0x%x\n", xhci->error_bitmask); |
357 | xhci->error_bitmask = 0; | |
358 | xhci_dbg(xhci, "Event ring:\n"); | |
359 | xhci_debug_segment(xhci, xhci->event_ring->deq_seg); | |
360 | xhci_dbg_ring_ptrs(xhci, xhci->event_ring); | |
8e595a5d SS |
361 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
362 | temp_64 &= ~ERST_PTR_MASK; | |
363 | xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); | |
7f84eef0 SS |
364 | xhci_dbg(xhci, "Command ring:\n"); |
365 | xhci_debug_segment(xhci, xhci->cmd_ring->deq_seg); | |
366 | xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); | |
367 | xhci_dbg_cmd_ptrs(xhci); | |
3ffbba95 | 368 | for (i = 0; i < MAX_HC_SLOTS; ++i) { |
63a0d9ab SS |
369 | if (!xhci->devs[i]) |
370 | continue; | |
371 | for (j = 0; j < 31; ++j) { | |
e9df17eb | 372 | xhci_dbg_ep_rings(xhci, i, j, &xhci->devs[i]->eps[j]); |
3ffbba95 SS |
373 | } |
374 | } | |
7f84eef0 SS |
375 | spin_unlock_irqrestore(&xhci->lock, flags); |
376 | ||
377 | if (!xhci->zombie) | |
378 | mod_timer(&xhci->event_ring_timer, jiffies + POLL_TIMEOUT * HZ); | |
379 | else | |
380 | xhci_dbg(xhci, "Quit polling the event ring.\n"); | |
381 | } | |
382 | #endif | |
383 | ||
f6ff0ac8 SS |
384 | static int xhci_run_finished(struct xhci_hcd *xhci) |
385 | { | |
386 | if (xhci_start(xhci)) { | |
387 | xhci_halt(xhci); | |
388 | return -ENODEV; | |
389 | } | |
390 | xhci->shared_hcd->state = HC_STATE_RUNNING; | |
391 | ||
392 | if (xhci->quirks & XHCI_NEC_HOST) | |
393 | xhci_ring_cmd_db(xhci); | |
394 | ||
395 | xhci_dbg(xhci, "Finished xhci_run for USB3 roothub\n"); | |
396 | return 0; | |
397 | } | |
398 | ||
66d4eadd SS |
399 | /* |
400 | * Start the HC after it was halted. | |
401 | * | |
402 | * This function is called by the USB core when the HC driver is added. | |
403 | * Its opposite is xhci_stop(). | |
404 | * | |
405 | * xhci_init() must be called once before this function can be called. | |
406 | * Reset the HC, enable device slot contexts, program DCBAAP, and | |
407 | * set command ring pointer and event ring pointer. | |
408 | * | |
409 | * Setup MSI-X vectors and enable interrupts. | |
410 | */ | |
411 | int xhci_run(struct usb_hcd *hcd) | |
412 | { | |
413 | u32 temp; | |
8e595a5d | 414 | u64 temp_64; |
43b86af8 | 415 | u32 ret; |
66d4eadd | 416 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
43b86af8 | 417 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
66d4eadd | 418 | |
f6ff0ac8 SS |
419 | /* Start the xHCI host controller running only after the USB 2.0 roothub |
420 | * is setup. | |
421 | */ | |
66d4eadd | 422 | |
0f2a7930 | 423 | hcd->uses_new_polling = 1; |
f6ff0ac8 SS |
424 | if (!usb_hcd_is_primary_hcd(hcd)) |
425 | return xhci_run_finished(xhci); | |
0f2a7930 | 426 | |
7f84eef0 | 427 | xhci_dbg(xhci, "xhci_run\n"); |
43b86af8 DN |
428 | /* unregister the legacy interrupt */ |
429 | if (hcd->irq) | |
430 | free_irq(hcd->irq, hcd); | |
431 | hcd->irq = -1; | |
432 | ||
f5182b41 SS |
433 | /* Some Fresco Logic host controllers advertise MSI, but fail to |
434 | * generate interrupts. Don't even try to enable MSI. | |
435 | */ | |
436 | if (xhci->quirks & XHCI_BROKEN_MSI) | |
437 | goto legacy_irq; | |
438 | ||
66d4eadd | 439 | ret = xhci_setup_msix(xhci); |
43b86af8 DN |
440 | if (ret) |
441 | /* fall back to msi*/ | |
442 | ret = xhci_setup_msi(xhci); | |
443 | ||
444 | if (ret) { | |
f5182b41 | 445 | legacy_irq: |
43b86af8 DN |
446 | /* fall back to legacy interrupt*/ |
447 | ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED, | |
448 | hcd->irq_descr, hcd); | |
449 | if (ret) { | |
450 | xhci_err(xhci, "request interrupt %d failed\n", | |
451 | pdev->irq); | |
452 | return ret; | |
453 | } | |
454 | hcd->irq = pdev->irq; | |
455 | } | |
66d4eadd | 456 | |
7f84eef0 SS |
457 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
458 | init_timer(&xhci->event_ring_timer); | |
459 | xhci->event_ring_timer.data = (unsigned long) xhci; | |
23e3be11 | 460 | xhci->event_ring_timer.function = xhci_event_ring_work; |
7f84eef0 SS |
461 | /* Poll the event ring */ |
462 | xhci->event_ring_timer.expires = jiffies + POLL_TIMEOUT * HZ; | |
463 | xhci->zombie = 0; | |
464 | xhci_dbg(xhci, "Setting event ring polling timer\n"); | |
465 | add_timer(&xhci->event_ring_timer); | |
466 | #endif | |
467 | ||
66e49d87 SS |
468 | xhci_dbg(xhci, "Command ring memory map follows:\n"); |
469 | xhci_debug_ring(xhci, xhci->cmd_ring); | |
470 | xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); | |
471 | xhci_dbg_cmd_ptrs(xhci); | |
472 | ||
473 | xhci_dbg(xhci, "ERST memory map follows:\n"); | |
474 | xhci_dbg_erst(xhci, &xhci->erst); | |
475 | xhci_dbg(xhci, "Event ring:\n"); | |
476 | xhci_debug_ring(xhci, xhci->event_ring); | |
477 | xhci_dbg_ring_ptrs(xhci, xhci->event_ring); | |
478 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); | |
479 | temp_64 &= ~ERST_PTR_MASK; | |
480 | xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); | |
481 | ||
66d4eadd SS |
482 | xhci_dbg(xhci, "// Set the interrupt modulation register\n"); |
483 | temp = xhci_readl(xhci, &xhci->ir_set->irq_control); | |
a4d88302 | 484 | temp &= ~ER_IRQ_INTERVAL_MASK; |
66d4eadd SS |
485 | temp |= (u32) 160; |
486 | xhci_writel(xhci, temp, &xhci->ir_set->irq_control); | |
487 | ||
488 | /* Set the HCD state before we enable the irqs */ | |
66d4eadd SS |
489 | temp = xhci_readl(xhci, &xhci->op_regs->command); |
490 | temp |= (CMD_EIE); | |
491 | xhci_dbg(xhci, "// Enable interrupts, cmd = 0x%x.\n", | |
492 | temp); | |
493 | xhci_writel(xhci, temp, &xhci->op_regs->command); | |
494 | ||
495 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
700e2052 GKH |
496 | xhci_dbg(xhci, "// Enabling event ring interrupter %p by writing 0x%x to irq_pending\n", |
497 | xhci->ir_set, (unsigned int) ER_IRQ_ENABLE(temp)); | |
66d4eadd SS |
498 | xhci_writel(xhci, ER_IRQ_ENABLE(temp), |
499 | &xhci->ir_set->irq_pending); | |
09ece30e | 500 | xhci_print_ir_set(xhci, 0); |
66d4eadd | 501 | |
0238634d SS |
502 | if (xhci->quirks & XHCI_NEC_HOST) |
503 | xhci_queue_vendor_command(xhci, 0, 0, 0, | |
504 | TRB_TYPE(TRB_NEC_GET_FW)); | |
7f84eef0 | 505 | |
f6ff0ac8 SS |
506 | xhci_dbg(xhci, "Finished xhci_run for USB2 roothub\n"); |
507 | return 0; | |
508 | } | |
ed07453f | 509 | |
f6ff0ac8 SS |
510 | static void xhci_only_stop_hcd(struct usb_hcd *hcd) |
511 | { | |
512 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
66d4eadd | 513 | |
f6ff0ac8 SS |
514 | spin_lock_irq(&xhci->lock); |
515 | xhci_halt(xhci); | |
516 | ||
517 | /* The shared_hcd is going to be deallocated shortly (the USB core only | |
518 | * calls this function when allocation fails in usb_add_hcd(), or | |
519 | * usb_remove_hcd() is called). So we need to unset xHCI's pointer. | |
520 | */ | |
521 | xhci->shared_hcd = NULL; | |
522 | spin_unlock_irq(&xhci->lock); | |
66d4eadd SS |
523 | } |
524 | ||
525 | /* | |
526 | * Stop xHCI driver. | |
527 | * | |
528 | * This function is called by the USB core when the HC driver is removed. | |
529 | * Its opposite is xhci_run(). | |
530 | * | |
531 | * Disable device contexts, disable IRQs, and quiesce the HC. | |
532 | * Reset the HC, finish any completed transactions, and cleanup memory. | |
533 | */ | |
534 | void xhci_stop(struct usb_hcd *hcd) | |
535 | { | |
536 | u32 temp; | |
537 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
538 | ||
f6ff0ac8 SS |
539 | if (!usb_hcd_is_primary_hcd(hcd)) { |
540 | xhci_only_stop_hcd(xhci->shared_hcd); | |
541 | return; | |
542 | } | |
543 | ||
66d4eadd | 544 | spin_lock_irq(&xhci->lock); |
f6ff0ac8 SS |
545 | /* Make sure the xHC is halted for a USB3 roothub |
546 | * (xhci_stop() could be called as part of failed init). | |
547 | */ | |
66d4eadd SS |
548 | xhci_halt(xhci); |
549 | xhci_reset(xhci); | |
550 | spin_unlock_irq(&xhci->lock); | |
551 | ||
40a9fb17 ZR |
552 | xhci_cleanup_msix(xhci); |
553 | ||
7f84eef0 SS |
554 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
555 | /* Tell the event ring poll function not to reschedule */ | |
556 | xhci->zombie = 1; | |
557 | del_timer_sync(&xhci->event_ring_timer); | |
558 | #endif | |
559 | ||
c41136b0 AX |
560 | if (xhci->quirks & XHCI_AMD_PLL_FIX) |
561 | usb_amd_dev_put(); | |
562 | ||
66d4eadd SS |
563 | xhci_dbg(xhci, "// Disabling event ring interrupts\n"); |
564 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
565 | xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status); | |
566 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
567 | xhci_writel(xhci, ER_IRQ_DISABLE(temp), | |
568 | &xhci->ir_set->irq_pending); | |
09ece30e | 569 | xhci_print_ir_set(xhci, 0); |
66d4eadd SS |
570 | |
571 | xhci_dbg(xhci, "cleaning up memory\n"); | |
572 | xhci_mem_cleanup(xhci); | |
573 | xhci_dbg(xhci, "xhci_stop completed - status = %x\n", | |
574 | xhci_readl(xhci, &xhci->op_regs->status)); | |
575 | } | |
576 | ||
577 | /* | |
578 | * Shutdown HC (not bus-specific) | |
579 | * | |
580 | * This is called when the machine is rebooting or halting. We assume that the | |
581 | * machine will be powered off, and the HC's internal state will be reset. | |
582 | * Don't bother to free memory. | |
f6ff0ac8 SS |
583 | * |
584 | * This will only ever be called with the main usb_hcd (the USB3 roothub). | |
66d4eadd SS |
585 | */ |
586 | void xhci_shutdown(struct usb_hcd *hcd) | |
587 | { | |
588 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
589 | ||
590 | spin_lock_irq(&xhci->lock); | |
591 | xhci_halt(xhci); | |
43b86af8 | 592 | spin_unlock_irq(&xhci->lock); |
66d4eadd | 593 | |
40a9fb17 ZR |
594 | xhci_cleanup_msix(xhci); |
595 | ||
66d4eadd SS |
596 | xhci_dbg(xhci, "xhci_shutdown completed - status = %x\n", |
597 | xhci_readl(xhci, &xhci->op_regs->status)); | |
598 | } | |
599 | ||
b5b5c3ac | 600 | #ifdef CONFIG_PM |
5535b1d5 AX |
601 | static void xhci_save_registers(struct xhci_hcd *xhci) |
602 | { | |
603 | xhci->s3.command = xhci_readl(xhci, &xhci->op_regs->command); | |
604 | xhci->s3.dev_nt = xhci_readl(xhci, &xhci->op_regs->dev_notification); | |
605 | xhci->s3.dcbaa_ptr = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); | |
606 | xhci->s3.config_reg = xhci_readl(xhci, &xhci->op_regs->config_reg); | |
607 | xhci->s3.irq_pending = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
608 | xhci->s3.irq_control = xhci_readl(xhci, &xhci->ir_set->irq_control); | |
609 | xhci->s3.erst_size = xhci_readl(xhci, &xhci->ir_set->erst_size); | |
610 | xhci->s3.erst_base = xhci_read_64(xhci, &xhci->ir_set->erst_base); | |
611 | xhci->s3.erst_dequeue = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); | |
612 | } | |
613 | ||
614 | static void xhci_restore_registers(struct xhci_hcd *xhci) | |
615 | { | |
616 | xhci_writel(xhci, xhci->s3.command, &xhci->op_regs->command); | |
617 | xhci_writel(xhci, xhci->s3.dev_nt, &xhci->op_regs->dev_notification); | |
618 | xhci_write_64(xhci, xhci->s3.dcbaa_ptr, &xhci->op_regs->dcbaa_ptr); | |
619 | xhci_writel(xhci, xhci->s3.config_reg, &xhci->op_regs->config_reg); | |
620 | xhci_writel(xhci, xhci->s3.irq_pending, &xhci->ir_set->irq_pending); | |
621 | xhci_writel(xhci, xhci->s3.irq_control, &xhci->ir_set->irq_control); | |
622 | xhci_writel(xhci, xhci->s3.erst_size, &xhci->ir_set->erst_size); | |
623 | xhci_write_64(xhci, xhci->s3.erst_base, &xhci->ir_set->erst_base); | |
624 | } | |
625 | ||
89821320 SS |
626 | static void xhci_set_cmd_ring_deq(struct xhci_hcd *xhci) |
627 | { | |
628 | u64 val_64; | |
629 | ||
630 | /* step 2: initialize command ring buffer */ | |
631 | val_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); | |
632 | val_64 = (val_64 & (u64) CMD_RING_RSVD_BITS) | | |
633 | (xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg, | |
634 | xhci->cmd_ring->dequeue) & | |
635 | (u64) ~CMD_RING_RSVD_BITS) | | |
636 | xhci->cmd_ring->cycle_state; | |
637 | xhci_dbg(xhci, "// Setting command ring address to 0x%llx\n", | |
638 | (long unsigned long) val_64); | |
639 | xhci_write_64(xhci, val_64, &xhci->op_regs->cmd_ring); | |
640 | } | |
641 | ||
642 | /* | |
643 | * The whole command ring must be cleared to zero when we suspend the host. | |
644 | * | |
645 | * The host doesn't save the command ring pointer in the suspend well, so we | |
646 | * need to re-program it on resume. Unfortunately, the pointer must be 64-byte | |
647 | * aligned, because of the reserved bits in the command ring dequeue pointer | |
648 | * register. Therefore, we can't just set the dequeue pointer back in the | |
649 | * middle of the ring (TRBs are 16-byte aligned). | |
650 | */ | |
651 | static void xhci_clear_command_ring(struct xhci_hcd *xhci) | |
652 | { | |
653 | struct xhci_ring *ring; | |
654 | struct xhci_segment *seg; | |
655 | ||
656 | ring = xhci->cmd_ring; | |
657 | seg = ring->deq_seg; | |
658 | do { | |
659 | memset(seg->trbs, 0, SEGMENT_SIZE); | |
660 | seg = seg->next; | |
661 | } while (seg != ring->deq_seg); | |
662 | ||
663 | /* Reset the software enqueue and dequeue pointers */ | |
664 | ring->deq_seg = ring->first_seg; | |
665 | ring->dequeue = ring->first_seg->trbs; | |
666 | ring->enq_seg = ring->deq_seg; | |
667 | ring->enqueue = ring->dequeue; | |
668 | ||
669 | /* | |
670 | * Ring is now zeroed, so the HW should look for change of ownership | |
671 | * when the cycle bit is set to 1. | |
672 | */ | |
673 | ring->cycle_state = 1; | |
674 | ||
675 | /* | |
676 | * Reset the hardware dequeue pointer. | |
677 | * Yes, this will need to be re-written after resume, but we're paranoid | |
678 | * and want to make sure the hardware doesn't access bogus memory | |
679 | * because, say, the BIOS or an SMI started the host without changing | |
680 | * the command ring pointers. | |
681 | */ | |
682 | xhci_set_cmd_ring_deq(xhci); | |
683 | } | |
684 | ||
5535b1d5 AX |
685 | /* |
686 | * Stop HC (not bus-specific) | |
687 | * | |
688 | * This is called when the machine transition into S3/S4 mode. | |
689 | * | |
690 | */ | |
691 | int xhci_suspend(struct xhci_hcd *xhci) | |
692 | { | |
693 | int rc = 0; | |
694 | struct usb_hcd *hcd = xhci_to_hcd(xhci); | |
695 | u32 command; | |
0029227f | 696 | int i; |
5535b1d5 AX |
697 | |
698 | spin_lock_irq(&xhci->lock); | |
699 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
b3209379 | 700 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags); |
5535b1d5 AX |
701 | /* step 1: stop endpoint */ |
702 | /* skipped assuming that port suspend has done */ | |
703 | ||
704 | /* step 2: clear Run/Stop bit */ | |
705 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
706 | command &= ~CMD_RUN; | |
707 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
708 | if (handshake(xhci, &xhci->op_regs->status, | |
709 | STS_HALT, STS_HALT, 100*100)) { | |
710 | xhci_warn(xhci, "WARN: xHC CMD_RUN timeout\n"); | |
711 | spin_unlock_irq(&xhci->lock); | |
712 | return -ETIMEDOUT; | |
713 | } | |
89821320 | 714 | xhci_clear_command_ring(xhci); |
5535b1d5 AX |
715 | |
716 | /* step 3: save registers */ | |
717 | xhci_save_registers(xhci); | |
718 | ||
719 | /* step 4: set CSS flag */ | |
720 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
721 | command |= CMD_CSS; | |
722 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
723 | if (handshake(xhci, &xhci->op_regs->status, STS_SAVE, 0, 10*100)) { | |
724 | xhci_warn(xhci, "WARN: xHC CMD_CSS timeout\n"); | |
725 | spin_unlock_irq(&xhci->lock); | |
726 | return -ETIMEDOUT; | |
727 | } | |
5535b1d5 AX |
728 | spin_unlock_irq(&xhci->lock); |
729 | ||
0029227f AX |
730 | /* step 5: remove core well power */ |
731 | /* synchronize irq when using MSI-X */ | |
732 | if (xhci->msix_entries) { | |
733 | for (i = 0; i < xhci->msix_count; i++) | |
734 | synchronize_irq(xhci->msix_entries[i].vector); | |
735 | } | |
736 | ||
5535b1d5 AX |
737 | return rc; |
738 | } | |
739 | ||
740 | /* | |
741 | * start xHC (not bus-specific) | |
742 | * | |
743 | * This is called when the machine transition from S3/S4 mode. | |
744 | * | |
745 | */ | |
746 | int xhci_resume(struct xhci_hcd *xhci, bool hibernated) | |
747 | { | |
748 | u32 command, temp = 0; | |
749 | struct usb_hcd *hcd = xhci_to_hcd(xhci); | |
65b22f93 | 750 | struct usb_hcd *secondary_hcd; |
019a35f1 | 751 | int retval; |
5535b1d5 | 752 | |
f6ff0ac8 | 753 | /* Wait a bit if either of the roothubs need to settle from the |
25985edc | 754 | * transition into bus suspend. |
20b67cf5 | 755 | */ |
f6ff0ac8 SS |
756 | if (time_before(jiffies, xhci->bus_state[0].next_statechange) || |
757 | time_before(jiffies, | |
758 | xhci->bus_state[1].next_statechange)) | |
5535b1d5 AX |
759 | msleep(100); |
760 | ||
761 | spin_lock_irq(&xhci->lock); | |
c877b3b2 ML |
762 | if (xhci->quirks & XHCI_RESET_ON_RESUME) |
763 | hibernated = true; | |
5535b1d5 AX |
764 | |
765 | if (!hibernated) { | |
766 | /* step 1: restore register */ | |
767 | xhci_restore_registers(xhci); | |
768 | /* step 2: initialize command ring buffer */ | |
89821320 | 769 | xhci_set_cmd_ring_deq(xhci); |
5535b1d5 AX |
770 | /* step 3: restore state and start state*/ |
771 | /* step 3: set CRS flag */ | |
772 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
773 | command |= CMD_CRS; | |
774 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
775 | if (handshake(xhci, &xhci->op_regs->status, | |
776 | STS_RESTORE, 0, 10*100)) { | |
777 | xhci_dbg(xhci, "WARN: xHC CMD_CSS timeout\n"); | |
778 | spin_unlock_irq(&xhci->lock); | |
779 | return -ETIMEDOUT; | |
780 | } | |
781 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
782 | } | |
783 | ||
784 | /* If restore operation fails, re-initialize the HC during resume */ | |
785 | if ((temp & STS_SRE) || hibernated) { | |
fedd383e SS |
786 | /* Let the USB core know _both_ roothubs lost power. */ |
787 | usb_root_hub_lost_power(xhci->main_hcd->self.root_hub); | |
788 | usb_root_hub_lost_power(xhci->shared_hcd->self.root_hub); | |
5535b1d5 AX |
789 | |
790 | xhci_dbg(xhci, "Stop HCD\n"); | |
791 | xhci_halt(xhci); | |
792 | xhci_reset(xhci); | |
5535b1d5 | 793 | spin_unlock_irq(&xhci->lock); |
0029227f | 794 | xhci_cleanup_msix(xhci); |
5535b1d5 AX |
795 | |
796 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING | |
797 | /* Tell the event ring poll function not to reschedule */ | |
798 | xhci->zombie = 1; | |
799 | del_timer_sync(&xhci->event_ring_timer); | |
800 | #endif | |
801 | ||
802 | xhci_dbg(xhci, "// Disabling event ring interrupts\n"); | |
803 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
804 | xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status); | |
805 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
806 | xhci_writel(xhci, ER_IRQ_DISABLE(temp), | |
807 | &xhci->ir_set->irq_pending); | |
09ece30e | 808 | xhci_print_ir_set(xhci, 0); |
5535b1d5 AX |
809 | |
810 | xhci_dbg(xhci, "cleaning up memory\n"); | |
811 | xhci_mem_cleanup(xhci); | |
812 | xhci_dbg(xhci, "xhci_stop completed - status = %x\n", | |
813 | xhci_readl(xhci, &xhci->op_regs->status)); | |
814 | ||
65b22f93 SS |
815 | /* USB core calls the PCI reinit and start functions twice: |
816 | * first with the primary HCD, and then with the secondary HCD. | |
817 | * If we don't do the same, the host will never be started. | |
818 | */ | |
819 | if (!usb_hcd_is_primary_hcd(hcd)) | |
820 | secondary_hcd = hcd; | |
821 | else | |
822 | secondary_hcd = xhci->shared_hcd; | |
823 | ||
824 | xhci_dbg(xhci, "Initialize the xhci_hcd\n"); | |
825 | retval = xhci_init(hcd->primary_hcd); | |
5535b1d5 AX |
826 | if (retval) |
827 | return retval; | |
65b22f93 SS |
828 | xhci_dbg(xhci, "Start the primary HCD\n"); |
829 | retval = xhci_run(hcd->primary_hcd); | |
830 | if (retval) | |
831 | goto failed_restart; | |
5535b1d5 | 832 | |
65b22f93 SS |
833 | xhci_dbg(xhci, "Start the secondary HCD\n"); |
834 | retval = xhci_run(secondary_hcd); | |
b3209379 | 835 | if (!retval) { |
5535b1d5 | 836 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
b3209379 SS |
837 | set_bit(HCD_FLAG_HW_ACCESSIBLE, |
838 | &xhci->shared_hcd->flags); | |
839 | } | |
65b22f93 | 840 | failed_restart: |
5535b1d5 | 841 | hcd->state = HC_STATE_SUSPENDED; |
b3209379 | 842 | xhci->shared_hcd->state = HC_STATE_SUSPENDED; |
5535b1d5 AX |
843 | return retval; |
844 | } | |
845 | ||
5535b1d5 AX |
846 | /* step 4: set Run/Stop bit */ |
847 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
848 | command |= CMD_RUN; | |
849 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
850 | handshake(xhci, &xhci->op_regs->status, STS_HALT, | |
851 | 0, 250 * 1000); | |
852 | ||
853 | /* step 5: walk topology and initialize portsc, | |
854 | * portpmsc and portli | |
855 | */ | |
856 | /* this is done in bus_resume */ | |
857 | ||
858 | /* step 6: restart each of the previously | |
859 | * Running endpoints by ringing their doorbells | |
860 | */ | |
861 | ||
862 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
b3209379 | 863 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags); |
5535b1d5 AX |
864 | |
865 | spin_unlock_irq(&xhci->lock); | |
866 | return 0; | |
867 | } | |
b5b5c3ac SS |
868 | #endif /* CONFIG_PM */ |
869 | ||
7f84eef0 SS |
870 | /*-------------------------------------------------------------------------*/ |
871 | ||
d0e96f5a SS |
872 | /** |
873 | * xhci_get_endpoint_index - Used for passing endpoint bitmasks between the core and | |
874 | * HCDs. Find the index for an endpoint given its descriptor. Use the return | |
875 | * value to right shift 1 for the bitmask. | |
876 | * | |
877 | * Index = (epnum * 2) + direction - 1, | |
878 | * where direction = 0 for OUT, 1 for IN. | |
879 | * For control endpoints, the IN index is used (OUT index is unused), so | |
880 | * index = (epnum * 2) + direction - 1 = (epnum * 2) + 1 - 1 = (epnum * 2) | |
881 | */ | |
882 | unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc) | |
883 | { | |
884 | unsigned int index; | |
885 | if (usb_endpoint_xfer_control(desc)) | |
886 | index = (unsigned int) (usb_endpoint_num(desc)*2); | |
887 | else | |
888 | index = (unsigned int) (usb_endpoint_num(desc)*2) + | |
889 | (usb_endpoint_dir_in(desc) ? 1 : 0) - 1; | |
890 | return index; | |
891 | } | |
892 | ||
f94e0186 SS |
893 | /* Find the flag for this endpoint (for use in the control context). Use the |
894 | * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is | |
895 | * bit 1, etc. | |
896 | */ | |
897 | unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc) | |
898 | { | |
899 | return 1 << (xhci_get_endpoint_index(desc) + 1); | |
900 | } | |
901 | ||
ac9d8fe7 SS |
902 | /* Find the flag for this endpoint (for use in the control context). Use the |
903 | * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is | |
904 | * bit 1, etc. | |
905 | */ | |
906 | unsigned int xhci_get_endpoint_flag_from_index(unsigned int ep_index) | |
907 | { | |
908 | return 1 << (ep_index + 1); | |
909 | } | |
910 | ||
f94e0186 SS |
911 | /* Compute the last valid endpoint context index. Basically, this is the |
912 | * endpoint index plus one. For slot contexts with more than valid endpoint, | |
913 | * we find the most significant bit set in the added contexts flags. | |
914 | * e.g. ep 1 IN (with epnum 0x81) => added_ctxs = 0b1000 | |
915 | * fls(0b1000) = 4, but the endpoint context index is 3, so subtract one. | |
916 | */ | |
ac9d8fe7 | 917 | unsigned int xhci_last_valid_endpoint(u32 added_ctxs) |
f94e0186 SS |
918 | { |
919 | return fls(added_ctxs) - 1; | |
920 | } | |
921 | ||
d0e96f5a SS |
922 | /* Returns 1 if the arguments are OK; |
923 | * returns 0 this is a root hub; returns -EINVAL for NULL pointers. | |
924 | */ | |
8212a49d | 925 | static int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev, |
64927730 AX |
926 | struct usb_host_endpoint *ep, int check_ep, bool check_virt_dev, |
927 | const char *func) { | |
928 | struct xhci_hcd *xhci; | |
929 | struct xhci_virt_device *virt_dev; | |
930 | ||
d0e96f5a SS |
931 | if (!hcd || (check_ep && !ep) || !udev) { |
932 | printk(KERN_DEBUG "xHCI %s called with invalid args\n", | |
933 | func); | |
934 | return -EINVAL; | |
935 | } | |
936 | if (!udev->parent) { | |
937 | printk(KERN_DEBUG "xHCI %s called for root hub\n", | |
938 | func); | |
939 | return 0; | |
940 | } | |
64927730 AX |
941 | |
942 | if (check_virt_dev) { | |
943 | xhci = hcd_to_xhci(hcd); | |
944 | if (!udev->slot_id || !xhci->devs | |
945 | || !xhci->devs[udev->slot_id]) { | |
946 | printk(KERN_DEBUG "xHCI %s called with unaddressed " | |
947 | "device\n", func); | |
948 | return -EINVAL; | |
949 | } | |
950 | ||
951 | virt_dev = xhci->devs[udev->slot_id]; | |
952 | if (virt_dev->udev != udev) { | |
953 | printk(KERN_DEBUG "xHCI %s called with udev and " | |
954 | "virt_dev does not match\n", func); | |
955 | return -EINVAL; | |
956 | } | |
d0e96f5a | 957 | } |
64927730 | 958 | |
d0e96f5a SS |
959 | return 1; |
960 | } | |
961 | ||
2d3f1fac | 962 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, |
913a8a34 SS |
963 | struct usb_device *udev, struct xhci_command *command, |
964 | bool ctx_change, bool must_succeed); | |
2d3f1fac SS |
965 | |
966 | /* | |
967 | * Full speed devices may have a max packet size greater than 8 bytes, but the | |
968 | * USB core doesn't know that until it reads the first 8 bytes of the | |
969 | * descriptor. If the usb_device's max packet size changes after that point, | |
970 | * we need to issue an evaluate context command and wait on it. | |
971 | */ | |
972 | static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id, | |
973 | unsigned int ep_index, struct urb *urb) | |
974 | { | |
975 | struct xhci_container_ctx *in_ctx; | |
976 | struct xhci_container_ctx *out_ctx; | |
977 | struct xhci_input_control_ctx *ctrl_ctx; | |
978 | struct xhci_ep_ctx *ep_ctx; | |
979 | int max_packet_size; | |
980 | int hw_max_packet_size; | |
981 | int ret = 0; | |
982 | ||
983 | out_ctx = xhci->devs[slot_id]->out_ctx; | |
984 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); | |
28ccd296 ME |
985 | hw_max_packet_size = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2)); |
986 | max_packet_size = le16_to_cpu(urb->dev->ep0.desc.wMaxPacketSize); | |
2d3f1fac SS |
987 | if (hw_max_packet_size != max_packet_size) { |
988 | xhci_dbg(xhci, "Max Packet Size for ep 0 changed.\n"); | |
989 | xhci_dbg(xhci, "Max packet size in usb_device = %d\n", | |
990 | max_packet_size); | |
991 | xhci_dbg(xhci, "Max packet size in xHCI HW = %d\n", | |
992 | hw_max_packet_size); | |
993 | xhci_dbg(xhci, "Issuing evaluate context command.\n"); | |
994 | ||
995 | /* Set up the modified control endpoint 0 */ | |
913a8a34 SS |
996 | xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, |
997 | xhci->devs[slot_id]->out_ctx, ep_index); | |
2d3f1fac SS |
998 | in_ctx = xhci->devs[slot_id]->in_ctx; |
999 | ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); | |
28ccd296 ME |
1000 | ep_ctx->ep_info2 &= cpu_to_le32(~MAX_PACKET_MASK); |
1001 | ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet_size)); | |
2d3f1fac SS |
1002 | |
1003 | /* Set up the input context flags for the command */ | |
1004 | /* FIXME: This won't work if a non-default control endpoint | |
1005 | * changes max packet sizes. | |
1006 | */ | |
1007 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
28ccd296 | 1008 | ctrl_ctx->add_flags = cpu_to_le32(EP0_FLAG); |
2d3f1fac SS |
1009 | ctrl_ctx->drop_flags = 0; |
1010 | ||
1011 | xhci_dbg(xhci, "Slot %d input context\n", slot_id); | |
1012 | xhci_dbg_ctx(xhci, in_ctx, ep_index); | |
1013 | xhci_dbg(xhci, "Slot %d output context\n", slot_id); | |
1014 | xhci_dbg_ctx(xhci, out_ctx, ep_index); | |
1015 | ||
913a8a34 SS |
1016 | ret = xhci_configure_endpoint(xhci, urb->dev, NULL, |
1017 | true, false); | |
2d3f1fac SS |
1018 | |
1019 | /* Clean up the input context for later use by bandwidth | |
1020 | * functions. | |
1021 | */ | |
28ccd296 | 1022 | ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG); |
2d3f1fac SS |
1023 | } |
1024 | return ret; | |
1025 | } | |
1026 | ||
d0e96f5a SS |
1027 | /* |
1028 | * non-error returns are a promise to giveback() the urb later | |
1029 | * we drop ownership so next owner (or urb unlink) can get it | |
1030 | */ | |
1031 | int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) | |
1032 | { | |
1033 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
1034 | unsigned long flags; | |
1035 | int ret = 0; | |
1036 | unsigned int slot_id, ep_index; | |
8e51adcc AX |
1037 | struct urb_priv *urb_priv; |
1038 | int size, i; | |
2d3f1fac | 1039 | |
64927730 AX |
1040 | if (!urb || xhci_check_args(hcd, urb->dev, urb->ep, |
1041 | true, true, __func__) <= 0) | |
d0e96f5a SS |
1042 | return -EINVAL; |
1043 | ||
1044 | slot_id = urb->dev->slot_id; | |
1045 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); | |
d0e96f5a | 1046 | |
541c7d43 | 1047 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
d0e96f5a SS |
1048 | if (!in_interrupt()) |
1049 | xhci_dbg(xhci, "urb submitted during PCI suspend\n"); | |
1050 | ret = -ESHUTDOWN; | |
1051 | goto exit; | |
1052 | } | |
8e51adcc AX |
1053 | |
1054 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) | |
1055 | size = urb->number_of_packets; | |
1056 | else | |
1057 | size = 1; | |
1058 | ||
1059 | urb_priv = kzalloc(sizeof(struct urb_priv) + | |
1060 | size * sizeof(struct xhci_td *), mem_flags); | |
1061 | if (!urb_priv) | |
1062 | return -ENOMEM; | |
1063 | ||
1064 | for (i = 0; i < size; i++) { | |
1065 | urb_priv->td[i] = kzalloc(sizeof(struct xhci_td), mem_flags); | |
1066 | if (!urb_priv->td[i]) { | |
1067 | urb_priv->length = i; | |
1068 | xhci_urb_free_priv(xhci, urb_priv); | |
1069 | return -ENOMEM; | |
1070 | } | |
1071 | } | |
1072 | ||
1073 | urb_priv->length = size; | |
1074 | urb_priv->td_cnt = 0; | |
1075 | urb->hcpriv = urb_priv; | |
1076 | ||
2d3f1fac SS |
1077 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
1078 | /* Check to see if the max packet size for the default control | |
1079 | * endpoint changed during FS device enumeration | |
1080 | */ | |
1081 | if (urb->dev->speed == USB_SPEED_FULL) { | |
1082 | ret = xhci_check_maxpacket(xhci, slot_id, | |
1083 | ep_index, urb); | |
1084 | if (ret < 0) | |
1085 | return ret; | |
1086 | } | |
1087 | ||
b11069f5 SS |
1088 | /* We have a spinlock and interrupts disabled, so we must pass |
1089 | * atomic context to this function, which may allocate memory. | |
1090 | */ | |
2d3f1fac | 1091 | spin_lock_irqsave(&xhci->lock, flags); |
6f5165cf SS |
1092 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1093 | goto dying; | |
b11069f5 | 1094 | ret = xhci_queue_ctrl_tx(xhci, GFP_ATOMIC, urb, |
23e3be11 | 1095 | slot_id, ep_index); |
2d3f1fac SS |
1096 | spin_unlock_irqrestore(&xhci->lock, flags); |
1097 | } else if (usb_endpoint_xfer_bulk(&urb->ep->desc)) { | |
1098 | spin_lock_irqsave(&xhci->lock, flags); | |
6f5165cf SS |
1099 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1100 | goto dying; | |
8df75f42 SS |
1101 | if (xhci->devs[slot_id]->eps[ep_index].ep_state & |
1102 | EP_GETTING_STREAMS) { | |
1103 | xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep " | |
1104 | "is transitioning to using streams.\n"); | |
1105 | ret = -EINVAL; | |
1106 | } else if (xhci->devs[slot_id]->eps[ep_index].ep_state & | |
1107 | EP_GETTING_NO_STREAMS) { | |
1108 | xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep " | |
1109 | "is transitioning to " | |
1110 | "not having streams.\n"); | |
1111 | ret = -EINVAL; | |
1112 | } else { | |
1113 | ret = xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb, | |
1114 | slot_id, ep_index); | |
1115 | } | |
2d3f1fac | 1116 | spin_unlock_irqrestore(&xhci->lock, flags); |
624defa1 SS |
1117 | } else if (usb_endpoint_xfer_int(&urb->ep->desc)) { |
1118 | spin_lock_irqsave(&xhci->lock, flags); | |
6f5165cf SS |
1119 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1120 | goto dying; | |
624defa1 SS |
1121 | ret = xhci_queue_intr_tx(xhci, GFP_ATOMIC, urb, |
1122 | slot_id, ep_index); | |
1123 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2d3f1fac | 1124 | } else { |
787f4e5a AX |
1125 | spin_lock_irqsave(&xhci->lock, flags); |
1126 | if (xhci->xhc_state & XHCI_STATE_DYING) | |
1127 | goto dying; | |
1128 | ret = xhci_queue_isoc_tx_prepare(xhci, GFP_ATOMIC, urb, | |
1129 | slot_id, ep_index); | |
1130 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2d3f1fac | 1131 | } |
d0e96f5a | 1132 | exit: |
d0e96f5a | 1133 | return ret; |
6f5165cf | 1134 | dying: |
8e51adcc AX |
1135 | xhci_urb_free_priv(xhci, urb_priv); |
1136 | urb->hcpriv = NULL; | |
6f5165cf SS |
1137 | xhci_dbg(xhci, "Ep 0x%x: URB %p submitted for " |
1138 | "non-responsive xHCI host.\n", | |
1139 | urb->ep->desc.bEndpointAddress, urb); | |
1140 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1141 | return -ESHUTDOWN; | |
d0e96f5a SS |
1142 | } |
1143 | ||
021bff91 SS |
1144 | /* Get the right ring for the given URB. |
1145 | * If the endpoint supports streams, boundary check the URB's stream ID. | |
1146 | * If the endpoint doesn't support streams, return the singular endpoint ring. | |
1147 | */ | |
1148 | static struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci, | |
1149 | struct urb *urb) | |
1150 | { | |
1151 | unsigned int slot_id; | |
1152 | unsigned int ep_index; | |
1153 | unsigned int stream_id; | |
1154 | struct xhci_virt_ep *ep; | |
1155 | ||
1156 | slot_id = urb->dev->slot_id; | |
1157 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); | |
1158 | stream_id = urb->stream_id; | |
1159 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
1160 | /* Common case: no streams */ | |
1161 | if (!(ep->ep_state & EP_HAS_STREAMS)) | |
1162 | return ep->ring; | |
1163 | ||
1164 | if (stream_id == 0) { | |
1165 | xhci_warn(xhci, | |
1166 | "WARN: Slot ID %u, ep index %u has streams, " | |
1167 | "but URB has no stream ID.\n", | |
1168 | slot_id, ep_index); | |
1169 | return NULL; | |
1170 | } | |
1171 | ||
1172 | if (stream_id < ep->stream_info->num_streams) | |
1173 | return ep->stream_info->stream_rings[stream_id]; | |
1174 | ||
1175 | xhci_warn(xhci, | |
1176 | "WARN: Slot ID %u, ep index %u has " | |
1177 | "stream IDs 1 to %u allocated, " | |
1178 | "but stream ID %u is requested.\n", | |
1179 | slot_id, ep_index, | |
1180 | ep->stream_info->num_streams - 1, | |
1181 | stream_id); | |
1182 | return NULL; | |
1183 | } | |
1184 | ||
ae636747 SS |
1185 | /* |
1186 | * Remove the URB's TD from the endpoint ring. This may cause the HC to stop | |
1187 | * USB transfers, potentially stopping in the middle of a TRB buffer. The HC | |
1188 | * should pick up where it left off in the TD, unless a Set Transfer Ring | |
1189 | * Dequeue Pointer is issued. | |
1190 | * | |
1191 | * The TRBs that make up the buffers for the canceled URB will be "removed" from | |
1192 | * the ring. Since the ring is a contiguous structure, they can't be physically | |
1193 | * removed. Instead, there are two options: | |
1194 | * | |
1195 | * 1) If the HC is in the middle of processing the URB to be canceled, we | |
1196 | * simply move the ring's dequeue pointer past those TRBs using the Set | |
1197 | * Transfer Ring Dequeue Pointer command. This will be the common case, | |
1198 | * when drivers timeout on the last submitted URB and attempt to cancel. | |
1199 | * | |
1200 | * 2) If the HC is in the middle of a different TD, we turn the TRBs into a | |
1201 | * series of 1-TRB transfer no-op TDs. (No-ops shouldn't be chained.) The | |
1202 | * HC will need to invalidate the any TRBs it has cached after the stop | |
1203 | * endpoint command, as noted in the xHCI 0.95 errata. | |
1204 | * | |
1205 | * 3) The TD may have completed by the time the Stop Endpoint Command | |
1206 | * completes, so software needs to handle that case too. | |
1207 | * | |
1208 | * This function should protect against the TD enqueueing code ringing the | |
1209 | * doorbell while this code is waiting for a Stop Endpoint command to complete. | |
1210 | * It also needs to account for multiple cancellations on happening at the same | |
1211 | * time for the same endpoint. | |
1212 | * | |
1213 | * Note that this function can be called in any context, or so says | |
1214 | * usb_hcd_unlink_urb() | |
d0e96f5a SS |
1215 | */ |
1216 | int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
1217 | { | |
ae636747 | 1218 | unsigned long flags; |
8e51adcc | 1219 | int ret, i; |
e34b2fbf | 1220 | u32 temp; |
ae636747 | 1221 | struct xhci_hcd *xhci; |
8e51adcc | 1222 | struct urb_priv *urb_priv; |
ae636747 SS |
1223 | struct xhci_td *td; |
1224 | unsigned int ep_index; | |
1225 | struct xhci_ring *ep_ring; | |
63a0d9ab | 1226 | struct xhci_virt_ep *ep; |
ae636747 SS |
1227 | |
1228 | xhci = hcd_to_xhci(hcd); | |
1229 | spin_lock_irqsave(&xhci->lock, flags); | |
1230 | /* Make sure the URB hasn't completed or been unlinked already */ | |
1231 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); | |
1232 | if (ret || !urb->hcpriv) | |
1233 | goto done; | |
e34b2fbf | 1234 | temp = xhci_readl(xhci, &xhci->op_regs->status); |
c6cc27c7 | 1235 | if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_HALTED)) { |
e34b2fbf | 1236 | xhci_dbg(xhci, "HW died, freeing TD.\n"); |
8e51adcc | 1237 | urb_priv = urb->hcpriv; |
e34b2fbf SS |
1238 | |
1239 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
1240 | spin_unlock_irqrestore(&xhci->lock, flags); | |
214f76f7 | 1241 | usb_hcd_giveback_urb(hcd, urb, -ESHUTDOWN); |
8e51adcc | 1242 | xhci_urb_free_priv(xhci, urb_priv); |
e34b2fbf SS |
1243 | return ret; |
1244 | } | |
6f5165cf SS |
1245 | if (xhci->xhc_state & XHCI_STATE_DYING) { |
1246 | xhci_dbg(xhci, "Ep 0x%x: URB %p to be canceled on " | |
1247 | "non-responsive xHCI host.\n", | |
1248 | urb->ep->desc.bEndpointAddress, urb); | |
1249 | /* Let the stop endpoint command watchdog timer (which set this | |
1250 | * state) finish cleaning up the endpoint TD lists. We must | |
1251 | * have caught it in the middle of dropping a lock and giving | |
1252 | * back an URB. | |
1253 | */ | |
1254 | goto done; | |
1255 | } | |
ae636747 | 1256 | |
700e2052 | 1257 | xhci_dbg(xhci, "Cancel URB %p\n", urb); |
66e49d87 SS |
1258 | xhci_dbg(xhci, "Event ring:\n"); |
1259 | xhci_debug_ring(xhci, xhci->event_ring); | |
ae636747 | 1260 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); |
63a0d9ab | 1261 | ep = &xhci->devs[urb->dev->slot_id]->eps[ep_index]; |
e9df17eb SS |
1262 | ep_ring = xhci_urb_to_transfer_ring(xhci, urb); |
1263 | if (!ep_ring) { | |
1264 | ret = -EINVAL; | |
1265 | goto done; | |
1266 | } | |
1267 | ||
66e49d87 SS |
1268 | xhci_dbg(xhci, "Endpoint ring:\n"); |
1269 | xhci_debug_ring(xhci, ep_ring); | |
ae636747 | 1270 | |
8e51adcc AX |
1271 | urb_priv = urb->hcpriv; |
1272 | ||
1273 | for (i = urb_priv->td_cnt; i < urb_priv->length; i++) { | |
1274 | td = urb_priv->td[i]; | |
1275 | list_add_tail(&td->cancelled_td_list, &ep->cancelled_td_list); | |
1276 | } | |
1277 | ||
ae636747 SS |
1278 | /* Queue a stop endpoint command, but only if this is |
1279 | * the first cancellation to be handled. | |
1280 | */ | |
678539cf SS |
1281 | if (!(ep->ep_state & EP_HALT_PENDING)) { |
1282 | ep->ep_state |= EP_HALT_PENDING; | |
6f5165cf SS |
1283 | ep->stop_cmds_pending++; |
1284 | ep->stop_cmd_timer.expires = jiffies + | |
1285 | XHCI_STOP_EP_CMD_TIMEOUT * HZ; | |
1286 | add_timer(&ep->stop_cmd_timer); | |
be88fe4f | 1287 | xhci_queue_stop_endpoint(xhci, urb->dev->slot_id, ep_index, 0); |
23e3be11 | 1288 | xhci_ring_cmd_db(xhci); |
ae636747 SS |
1289 | } |
1290 | done: | |
1291 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1292 | return ret; | |
d0e96f5a SS |
1293 | } |
1294 | ||
f94e0186 SS |
1295 | /* Drop an endpoint from a new bandwidth configuration for this device. |
1296 | * Only one call to this function is allowed per endpoint before | |
1297 | * check_bandwidth() or reset_bandwidth() must be called. | |
1298 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will | |
1299 | * add the endpoint to the schedule with possibly new parameters denoted by a | |
1300 | * different endpoint descriptor in usb_host_endpoint. | |
1301 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is | |
1302 | * not allowed. | |
f88ba78d SS |
1303 | * |
1304 | * The USB core will not allow URBs to be queued to an endpoint that is being | |
1305 | * disabled, so there's no need for mutual exclusion to protect | |
1306 | * the xhci->devs[slot_id] structure. | |
f94e0186 SS |
1307 | */ |
1308 | int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, | |
1309 | struct usb_host_endpoint *ep) | |
1310 | { | |
f94e0186 | 1311 | struct xhci_hcd *xhci; |
d115b048 JY |
1312 | struct xhci_container_ctx *in_ctx, *out_ctx; |
1313 | struct xhci_input_control_ctx *ctrl_ctx; | |
1314 | struct xhci_slot_ctx *slot_ctx; | |
f94e0186 SS |
1315 | unsigned int last_ctx; |
1316 | unsigned int ep_index; | |
1317 | struct xhci_ep_ctx *ep_ctx; | |
1318 | u32 drop_flag; | |
1319 | u32 new_add_flags, new_drop_flags, new_slot_info; | |
1320 | int ret; | |
1321 | ||
64927730 | 1322 | ret = xhci_check_args(hcd, udev, ep, 1, true, __func__); |
f94e0186 SS |
1323 | if (ret <= 0) |
1324 | return ret; | |
1325 | xhci = hcd_to_xhci(hcd); | |
fe6c6c13 SS |
1326 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1327 | return -ENODEV; | |
f94e0186 | 1328 | |
fe6c6c13 | 1329 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
1330 | drop_flag = xhci_get_endpoint_flag(&ep->desc); |
1331 | if (drop_flag == SLOT_FLAG || drop_flag == EP0_FLAG) { | |
1332 | xhci_dbg(xhci, "xHCI %s - can't drop slot or ep 0 %#x\n", | |
1333 | __func__, drop_flag); | |
1334 | return 0; | |
1335 | } | |
1336 | ||
f94e0186 | 1337 | in_ctx = xhci->devs[udev->slot_id]->in_ctx; |
d115b048 JY |
1338 | out_ctx = xhci->devs[udev->slot_id]->out_ctx; |
1339 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
f94e0186 | 1340 | ep_index = xhci_get_endpoint_index(&ep->desc); |
d115b048 | 1341 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
f94e0186 SS |
1342 | /* If the HC already knows the endpoint is disabled, |
1343 | * or the HCD has noted it is disabled, ignore this request | |
1344 | */ | |
f5960b69 ME |
1345 | if (((ep_ctx->ep_info & cpu_to_le32(EP_STATE_MASK)) == |
1346 | cpu_to_le32(EP_STATE_DISABLED)) || | |
28ccd296 ME |
1347 | le32_to_cpu(ctrl_ctx->drop_flags) & |
1348 | xhci_get_endpoint_flag(&ep->desc)) { | |
700e2052 GKH |
1349 | xhci_warn(xhci, "xHCI %s called with disabled ep %p\n", |
1350 | __func__, ep); | |
f94e0186 SS |
1351 | return 0; |
1352 | } | |
1353 | ||
28ccd296 ME |
1354 | ctrl_ctx->drop_flags |= cpu_to_le32(drop_flag); |
1355 | new_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags); | |
f94e0186 | 1356 | |
28ccd296 ME |
1357 | ctrl_ctx->add_flags &= cpu_to_le32(~drop_flag); |
1358 | new_add_flags = le32_to_cpu(ctrl_ctx->add_flags); | |
f94e0186 | 1359 | |
28ccd296 | 1360 | last_ctx = xhci_last_valid_endpoint(le32_to_cpu(ctrl_ctx->add_flags)); |
d115b048 | 1361 | slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); |
f94e0186 | 1362 | /* Update the last valid endpoint context, if we deleted the last one */ |
28ccd296 ME |
1363 | if ((le32_to_cpu(slot_ctx->dev_info) & LAST_CTX_MASK) > |
1364 | LAST_CTX(last_ctx)) { | |
1365 | slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); | |
1366 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(last_ctx)); | |
f94e0186 | 1367 | } |
28ccd296 | 1368 | new_slot_info = le32_to_cpu(slot_ctx->dev_info); |
f94e0186 SS |
1369 | |
1370 | xhci_endpoint_zero(xhci, xhci->devs[udev->slot_id], ep); | |
1371 | ||
f94e0186 SS |
1372 | xhci_dbg(xhci, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", |
1373 | (unsigned int) ep->desc.bEndpointAddress, | |
1374 | udev->slot_id, | |
1375 | (unsigned int) new_drop_flags, | |
1376 | (unsigned int) new_add_flags, | |
1377 | (unsigned int) new_slot_info); | |
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | /* Add an endpoint to a new possible bandwidth configuration for this device. | |
1382 | * Only one call to this function is allowed per endpoint before | |
1383 | * check_bandwidth() or reset_bandwidth() must be called. | |
1384 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will | |
1385 | * add the endpoint to the schedule with possibly new parameters denoted by a | |
1386 | * different endpoint descriptor in usb_host_endpoint. | |
1387 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is | |
1388 | * not allowed. | |
f88ba78d SS |
1389 | * |
1390 | * The USB core will not allow URBs to be queued to an endpoint until the | |
1391 | * configuration or alt setting is installed in the device, so there's no need | |
1392 | * for mutual exclusion to protect the xhci->devs[slot_id] structure. | |
f94e0186 SS |
1393 | */ |
1394 | int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, | |
1395 | struct usb_host_endpoint *ep) | |
1396 | { | |
f94e0186 | 1397 | struct xhci_hcd *xhci; |
d115b048 | 1398 | struct xhci_container_ctx *in_ctx, *out_ctx; |
f94e0186 SS |
1399 | unsigned int ep_index; |
1400 | struct xhci_ep_ctx *ep_ctx; | |
d115b048 JY |
1401 | struct xhci_slot_ctx *slot_ctx; |
1402 | struct xhci_input_control_ctx *ctrl_ctx; | |
f94e0186 SS |
1403 | u32 added_ctxs; |
1404 | unsigned int last_ctx; | |
1405 | u32 new_add_flags, new_drop_flags, new_slot_info; | |
fa75ac37 | 1406 | struct xhci_virt_device *virt_dev; |
f94e0186 SS |
1407 | int ret = 0; |
1408 | ||
64927730 | 1409 | ret = xhci_check_args(hcd, udev, ep, 1, true, __func__); |
a1587d97 SS |
1410 | if (ret <= 0) { |
1411 | /* So we won't queue a reset ep command for a root hub */ | |
1412 | ep->hcpriv = NULL; | |
f94e0186 | 1413 | return ret; |
a1587d97 | 1414 | } |
f94e0186 | 1415 | xhci = hcd_to_xhci(hcd); |
fe6c6c13 SS |
1416 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1417 | return -ENODEV; | |
f94e0186 SS |
1418 | |
1419 | added_ctxs = xhci_get_endpoint_flag(&ep->desc); | |
1420 | last_ctx = xhci_last_valid_endpoint(added_ctxs); | |
1421 | if (added_ctxs == SLOT_FLAG || added_ctxs == EP0_FLAG) { | |
1422 | /* FIXME when we have to issue an evaluate endpoint command to | |
1423 | * deal with ep0 max packet size changing once we get the | |
1424 | * descriptors | |
1425 | */ | |
1426 | xhci_dbg(xhci, "xHCI %s - can't add slot or ep 0 %#x\n", | |
1427 | __func__, added_ctxs); | |
1428 | return 0; | |
1429 | } | |
1430 | ||
fa75ac37 SS |
1431 | virt_dev = xhci->devs[udev->slot_id]; |
1432 | in_ctx = virt_dev->in_ctx; | |
1433 | out_ctx = virt_dev->out_ctx; | |
d115b048 | 1434 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); |
f94e0186 | 1435 | ep_index = xhci_get_endpoint_index(&ep->desc); |
d115b048 | 1436 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
fa75ac37 SS |
1437 | |
1438 | /* If this endpoint is already in use, and the upper layers are trying | |
1439 | * to add it again without dropping it, reject the addition. | |
1440 | */ | |
1441 | if (virt_dev->eps[ep_index].ring && | |
1442 | !(le32_to_cpu(ctrl_ctx->drop_flags) & | |
1443 | xhci_get_endpoint_flag(&ep->desc))) { | |
1444 | xhci_warn(xhci, "Trying to add endpoint 0x%x " | |
1445 | "without dropping it.\n", | |
1446 | (unsigned int) ep->desc.bEndpointAddress); | |
1447 | return -EINVAL; | |
1448 | } | |
1449 | ||
f94e0186 SS |
1450 | /* If the HCD has already noted the endpoint is enabled, |
1451 | * ignore this request. | |
1452 | */ | |
28ccd296 ME |
1453 | if (le32_to_cpu(ctrl_ctx->add_flags) & |
1454 | xhci_get_endpoint_flag(&ep->desc)) { | |
700e2052 GKH |
1455 | xhci_warn(xhci, "xHCI %s called with enabled ep %p\n", |
1456 | __func__, ep); | |
f94e0186 SS |
1457 | return 0; |
1458 | } | |
1459 | ||
f88ba78d SS |
1460 | /* |
1461 | * Configuration and alternate setting changes must be done in | |
1462 | * process context, not interrupt context (or so documenation | |
1463 | * for usb_set_interface() and usb_set_configuration() claim). | |
1464 | */ | |
fa75ac37 | 1465 | if (xhci_endpoint_init(xhci, virt_dev, udev, ep, GFP_NOIO) < 0) { |
f94e0186 SS |
1466 | dev_dbg(&udev->dev, "%s - could not initialize ep %#x\n", |
1467 | __func__, ep->desc.bEndpointAddress); | |
f94e0186 SS |
1468 | return -ENOMEM; |
1469 | } | |
1470 | ||
28ccd296 ME |
1471 | ctrl_ctx->add_flags |= cpu_to_le32(added_ctxs); |
1472 | new_add_flags = le32_to_cpu(ctrl_ctx->add_flags); | |
f94e0186 SS |
1473 | |
1474 | /* If xhci_endpoint_disable() was called for this endpoint, but the | |
1475 | * xHC hasn't been notified yet through the check_bandwidth() call, | |
1476 | * this re-adds a new state for the endpoint from the new endpoint | |
1477 | * descriptors. We must drop and re-add this endpoint, so we leave the | |
1478 | * drop flags alone. | |
1479 | */ | |
28ccd296 | 1480 | new_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags); |
f94e0186 | 1481 | |
d115b048 | 1482 | slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); |
f94e0186 | 1483 | /* Update the last valid endpoint context, if we just added one past */ |
28ccd296 ME |
1484 | if ((le32_to_cpu(slot_ctx->dev_info) & LAST_CTX_MASK) < |
1485 | LAST_CTX(last_ctx)) { | |
1486 | slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); | |
1487 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(last_ctx)); | |
f94e0186 | 1488 | } |
28ccd296 | 1489 | new_slot_info = le32_to_cpu(slot_ctx->dev_info); |
f94e0186 | 1490 | |
a1587d97 SS |
1491 | /* Store the usb_device pointer for later use */ |
1492 | ep->hcpriv = udev; | |
1493 | ||
f94e0186 SS |
1494 | xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", |
1495 | (unsigned int) ep->desc.bEndpointAddress, | |
1496 | udev->slot_id, | |
1497 | (unsigned int) new_drop_flags, | |
1498 | (unsigned int) new_add_flags, | |
1499 | (unsigned int) new_slot_info); | |
1500 | return 0; | |
1501 | } | |
1502 | ||
d115b048 | 1503 | static void xhci_zero_in_ctx(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev) |
f94e0186 | 1504 | { |
d115b048 | 1505 | struct xhci_input_control_ctx *ctrl_ctx; |
f94e0186 | 1506 | struct xhci_ep_ctx *ep_ctx; |
d115b048 | 1507 | struct xhci_slot_ctx *slot_ctx; |
f94e0186 SS |
1508 | int i; |
1509 | ||
1510 | /* When a device's add flag and drop flag are zero, any subsequent | |
1511 | * configure endpoint command will leave that endpoint's state | |
1512 | * untouched. Make sure we don't leave any old state in the input | |
1513 | * endpoint contexts. | |
1514 | */ | |
d115b048 JY |
1515 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
1516 | ctrl_ctx->drop_flags = 0; | |
1517 | ctrl_ctx->add_flags = 0; | |
1518 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); | |
28ccd296 | 1519 | slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); |
f94e0186 | 1520 | /* Endpoint 0 is always valid */ |
28ccd296 | 1521 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1)); |
f94e0186 | 1522 | for (i = 1; i < 31; ++i) { |
d115b048 | 1523 | ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, i); |
f94e0186 SS |
1524 | ep_ctx->ep_info = 0; |
1525 | ep_ctx->ep_info2 = 0; | |
8e595a5d | 1526 | ep_ctx->deq = 0; |
f94e0186 SS |
1527 | ep_ctx->tx_info = 0; |
1528 | } | |
1529 | } | |
1530 | ||
f2217e8e | 1531 | static int xhci_configure_endpoint_result(struct xhci_hcd *xhci, |
00161f7d | 1532 | struct usb_device *udev, u32 *cmd_status) |
f2217e8e SS |
1533 | { |
1534 | int ret; | |
1535 | ||
913a8a34 | 1536 | switch (*cmd_status) { |
f2217e8e SS |
1537 | case COMP_ENOMEM: |
1538 | dev_warn(&udev->dev, "Not enough host controller resources " | |
1539 | "for new device state.\n"); | |
1540 | ret = -ENOMEM; | |
1541 | /* FIXME: can we allocate more resources for the HC? */ | |
1542 | break; | |
1543 | case COMP_BW_ERR: | |
1544 | dev_warn(&udev->dev, "Not enough bandwidth " | |
1545 | "for new device state.\n"); | |
1546 | ret = -ENOSPC; | |
1547 | /* FIXME: can we go back to the old state? */ | |
1548 | break; | |
1549 | case COMP_TRB_ERR: | |
1550 | /* the HCD set up something wrong */ | |
1551 | dev_warn(&udev->dev, "ERROR: Endpoint drop flag = 0, " | |
1552 | "add flag = 1, " | |
1553 | "and endpoint is not disabled.\n"); | |
1554 | ret = -EINVAL; | |
1555 | break; | |
f6ba6fe2 AH |
1556 | case COMP_DEV_ERR: |
1557 | dev_warn(&udev->dev, "ERROR: Incompatible device for endpoint " | |
1558 | "configure command.\n"); | |
1559 | ret = -ENODEV; | |
1560 | break; | |
f2217e8e SS |
1561 | case COMP_SUCCESS: |
1562 | dev_dbg(&udev->dev, "Successful Endpoint Configure command\n"); | |
1563 | ret = 0; | |
1564 | break; | |
1565 | default: | |
1566 | xhci_err(xhci, "ERROR: unexpected command completion " | |
913a8a34 | 1567 | "code 0x%x.\n", *cmd_status); |
f2217e8e SS |
1568 | ret = -EINVAL; |
1569 | break; | |
1570 | } | |
1571 | return ret; | |
1572 | } | |
1573 | ||
1574 | static int xhci_evaluate_context_result(struct xhci_hcd *xhci, | |
00161f7d | 1575 | struct usb_device *udev, u32 *cmd_status) |
f2217e8e SS |
1576 | { |
1577 | int ret; | |
913a8a34 | 1578 | struct xhci_virt_device *virt_dev = xhci->devs[udev->slot_id]; |
f2217e8e | 1579 | |
913a8a34 | 1580 | switch (*cmd_status) { |
f2217e8e SS |
1581 | case COMP_EINVAL: |
1582 | dev_warn(&udev->dev, "WARN: xHCI driver setup invalid evaluate " | |
1583 | "context command.\n"); | |
1584 | ret = -EINVAL; | |
1585 | break; | |
1586 | case COMP_EBADSLT: | |
1587 | dev_warn(&udev->dev, "WARN: slot not enabled for" | |
1588 | "evaluate context command.\n"); | |
1589 | case COMP_CTX_STATE: | |
1590 | dev_warn(&udev->dev, "WARN: invalid context state for " | |
1591 | "evaluate context command.\n"); | |
1592 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 1); | |
1593 | ret = -EINVAL; | |
1594 | break; | |
f6ba6fe2 AH |
1595 | case COMP_DEV_ERR: |
1596 | dev_warn(&udev->dev, "ERROR: Incompatible device for evaluate " | |
1597 | "context command.\n"); | |
1598 | ret = -ENODEV; | |
1599 | break; | |
1bb73a88 AH |
1600 | case COMP_MEL_ERR: |
1601 | /* Max Exit Latency too large error */ | |
1602 | dev_warn(&udev->dev, "WARN: Max Exit Latency too large\n"); | |
1603 | ret = -EINVAL; | |
1604 | break; | |
f2217e8e SS |
1605 | case COMP_SUCCESS: |
1606 | dev_dbg(&udev->dev, "Successful evaluate context command\n"); | |
1607 | ret = 0; | |
1608 | break; | |
1609 | default: | |
1610 | xhci_err(xhci, "ERROR: unexpected command completion " | |
913a8a34 | 1611 | "code 0x%x.\n", *cmd_status); |
f2217e8e SS |
1612 | ret = -EINVAL; |
1613 | break; | |
1614 | } | |
1615 | return ret; | |
1616 | } | |
1617 | ||
2cf95c18 SS |
1618 | static u32 xhci_count_num_new_endpoints(struct xhci_hcd *xhci, |
1619 | struct xhci_container_ctx *in_ctx) | |
1620 | { | |
1621 | struct xhci_input_control_ctx *ctrl_ctx; | |
1622 | u32 valid_add_flags; | |
1623 | u32 valid_drop_flags; | |
1624 | ||
1625 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
1626 | /* Ignore the slot flag (bit 0), and the default control endpoint flag | |
1627 | * (bit 1). The default control endpoint is added during the Address | |
1628 | * Device command and is never removed until the slot is disabled. | |
1629 | */ | |
1630 | valid_add_flags = ctrl_ctx->add_flags >> 2; | |
1631 | valid_drop_flags = ctrl_ctx->drop_flags >> 2; | |
1632 | ||
1633 | /* Use hweight32 to count the number of ones in the add flags, or | |
1634 | * number of endpoints added. Don't count endpoints that are changed | |
1635 | * (both added and dropped). | |
1636 | */ | |
1637 | return hweight32(valid_add_flags) - | |
1638 | hweight32(valid_add_flags & valid_drop_flags); | |
1639 | } | |
1640 | ||
1641 | static unsigned int xhci_count_num_dropped_endpoints(struct xhci_hcd *xhci, | |
1642 | struct xhci_container_ctx *in_ctx) | |
1643 | { | |
1644 | struct xhci_input_control_ctx *ctrl_ctx; | |
1645 | u32 valid_add_flags; | |
1646 | u32 valid_drop_flags; | |
1647 | ||
1648 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
1649 | valid_add_flags = ctrl_ctx->add_flags >> 2; | |
1650 | valid_drop_flags = ctrl_ctx->drop_flags >> 2; | |
1651 | ||
1652 | return hweight32(valid_drop_flags) - | |
1653 | hweight32(valid_add_flags & valid_drop_flags); | |
1654 | } | |
1655 | ||
1656 | /* | |
1657 | * We need to reserve the new number of endpoints before the configure endpoint | |
1658 | * command completes. We can't subtract the dropped endpoints from the number | |
1659 | * of active endpoints until the command completes because we can oversubscribe | |
1660 | * the host in this case: | |
1661 | * | |
1662 | * - the first configure endpoint command drops more endpoints than it adds | |
1663 | * - a second configure endpoint command that adds more endpoints is queued | |
1664 | * - the first configure endpoint command fails, so the config is unchanged | |
1665 | * - the second command may succeed, even though there isn't enough resources | |
1666 | * | |
1667 | * Must be called with xhci->lock held. | |
1668 | */ | |
1669 | static int xhci_reserve_host_resources(struct xhci_hcd *xhci, | |
1670 | struct xhci_container_ctx *in_ctx) | |
1671 | { | |
1672 | u32 added_eps; | |
1673 | ||
1674 | added_eps = xhci_count_num_new_endpoints(xhci, in_ctx); | |
1675 | if (xhci->num_active_eps + added_eps > xhci->limit_active_eps) { | |
1676 | xhci_dbg(xhci, "Not enough ep ctxs: " | |
1677 | "%u active, need to add %u, limit is %u.\n", | |
1678 | xhci->num_active_eps, added_eps, | |
1679 | xhci->limit_active_eps); | |
1680 | return -ENOMEM; | |
1681 | } | |
1682 | xhci->num_active_eps += added_eps; | |
1683 | xhci_dbg(xhci, "Adding %u ep ctxs, %u now active.\n", added_eps, | |
1684 | xhci->num_active_eps); | |
1685 | return 0; | |
1686 | } | |
1687 | ||
1688 | /* | |
1689 | * The configure endpoint was failed by the xHC for some other reason, so we | |
1690 | * need to revert the resources that failed configuration would have used. | |
1691 | * | |
1692 | * Must be called with xhci->lock held. | |
1693 | */ | |
1694 | static void xhci_free_host_resources(struct xhci_hcd *xhci, | |
1695 | struct xhci_container_ctx *in_ctx) | |
1696 | { | |
1697 | u32 num_failed_eps; | |
1698 | ||
1699 | num_failed_eps = xhci_count_num_new_endpoints(xhci, in_ctx); | |
1700 | xhci->num_active_eps -= num_failed_eps; | |
1701 | xhci_dbg(xhci, "Removing %u failed ep ctxs, %u now active.\n", | |
1702 | num_failed_eps, | |
1703 | xhci->num_active_eps); | |
1704 | } | |
1705 | ||
1706 | /* | |
1707 | * Now that the command has completed, clean up the active endpoint count by | |
1708 | * subtracting out the endpoints that were dropped (but not changed). | |
1709 | * | |
1710 | * Must be called with xhci->lock held. | |
1711 | */ | |
1712 | static void xhci_finish_resource_reservation(struct xhci_hcd *xhci, | |
1713 | struct xhci_container_ctx *in_ctx) | |
1714 | { | |
1715 | u32 num_dropped_eps; | |
1716 | ||
1717 | num_dropped_eps = xhci_count_num_dropped_endpoints(xhci, in_ctx); | |
1718 | xhci->num_active_eps -= num_dropped_eps; | |
1719 | if (num_dropped_eps) | |
1720 | xhci_dbg(xhci, "Removing %u dropped ep ctxs, %u now active.\n", | |
1721 | num_dropped_eps, | |
1722 | xhci->num_active_eps); | |
1723 | } | |
1724 | ||
f2217e8e SS |
1725 | /* Issue a configure endpoint command or evaluate context command |
1726 | * and wait for it to finish. | |
1727 | */ | |
1728 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, | |
913a8a34 SS |
1729 | struct usb_device *udev, |
1730 | struct xhci_command *command, | |
1731 | bool ctx_change, bool must_succeed) | |
f2217e8e SS |
1732 | { |
1733 | int ret; | |
1734 | int timeleft; | |
1735 | unsigned long flags; | |
913a8a34 SS |
1736 | struct xhci_container_ctx *in_ctx; |
1737 | struct completion *cmd_completion; | |
28ccd296 | 1738 | u32 *cmd_status; |
913a8a34 | 1739 | struct xhci_virt_device *virt_dev; |
f2217e8e SS |
1740 | |
1741 | spin_lock_irqsave(&xhci->lock, flags); | |
913a8a34 SS |
1742 | virt_dev = xhci->devs[udev->slot_id]; |
1743 | if (command) { | |
1744 | in_ctx = command->in_ctx; | |
2cf95c18 SS |
1745 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK) && |
1746 | xhci_reserve_host_resources(xhci, in_ctx)) { | |
1747 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1748 | xhci_warn(xhci, "Not enough host resources, " | |
1749 | "active endpoint contexts = %u\n", | |
1750 | xhci->num_active_eps); | |
1751 | return -ENOMEM; | |
1752 | } | |
1753 | ||
913a8a34 SS |
1754 | cmd_completion = command->completion; |
1755 | cmd_status = &command->status; | |
1756 | command->command_trb = xhci->cmd_ring->enqueue; | |
7a3783ef PZ |
1757 | |
1758 | /* Enqueue pointer can be left pointing to the link TRB, | |
1759 | * we must handle that | |
1760 | */ | |
f5960b69 | 1761 | if (TRB_TYPE_LINK_LE32(command->command_trb->link.control)) |
7a3783ef PZ |
1762 | command->command_trb = |
1763 | xhci->cmd_ring->enq_seg->next->trbs; | |
1764 | ||
913a8a34 SS |
1765 | list_add_tail(&command->cmd_list, &virt_dev->cmd_list); |
1766 | } else { | |
1767 | in_ctx = virt_dev->in_ctx; | |
2cf95c18 SS |
1768 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK) && |
1769 | xhci_reserve_host_resources(xhci, in_ctx)) { | |
1770 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1771 | xhci_warn(xhci, "Not enough host resources, " | |
1772 | "active endpoint contexts = %u\n", | |
1773 | xhci->num_active_eps); | |
1774 | return -ENOMEM; | |
1775 | } | |
913a8a34 SS |
1776 | cmd_completion = &virt_dev->cmd_completion; |
1777 | cmd_status = &virt_dev->cmd_status; | |
1778 | } | |
1d68064a | 1779 | init_completion(cmd_completion); |
913a8a34 | 1780 | |
f2217e8e | 1781 | if (!ctx_change) |
913a8a34 SS |
1782 | ret = xhci_queue_configure_endpoint(xhci, in_ctx->dma, |
1783 | udev->slot_id, must_succeed); | |
f2217e8e | 1784 | else |
913a8a34 | 1785 | ret = xhci_queue_evaluate_context(xhci, in_ctx->dma, |
f2217e8e SS |
1786 | udev->slot_id); |
1787 | if (ret < 0) { | |
c01591bd SS |
1788 | if (command) |
1789 | list_del(&command->cmd_list); | |
2cf95c18 SS |
1790 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) |
1791 | xhci_free_host_resources(xhci, in_ctx); | |
f2217e8e SS |
1792 | spin_unlock_irqrestore(&xhci->lock, flags); |
1793 | xhci_dbg(xhci, "FIXME allocate a new ring segment\n"); | |
1794 | return -ENOMEM; | |
1795 | } | |
1796 | xhci_ring_cmd_db(xhci); | |
1797 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1798 | ||
1799 | /* Wait for the configure endpoint command to complete */ | |
1800 | timeleft = wait_for_completion_interruptible_timeout( | |
913a8a34 | 1801 | cmd_completion, |
f2217e8e SS |
1802 | USB_CTRL_SET_TIMEOUT); |
1803 | if (timeleft <= 0) { | |
1804 | xhci_warn(xhci, "%s while waiting for %s command\n", | |
1805 | timeleft == 0 ? "Timeout" : "Signal", | |
1806 | ctx_change == 0 ? | |
1807 | "configure endpoint" : | |
1808 | "evaluate context"); | |
1809 | /* FIXME cancel the configure endpoint command */ | |
1810 | return -ETIME; | |
1811 | } | |
1812 | ||
1813 | if (!ctx_change) | |
2cf95c18 SS |
1814 | ret = xhci_configure_endpoint_result(xhci, udev, cmd_status); |
1815 | else | |
1816 | ret = xhci_evaluate_context_result(xhci, udev, cmd_status); | |
1817 | ||
1818 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { | |
1819 | spin_lock_irqsave(&xhci->lock, flags); | |
1820 | /* If the command failed, remove the reserved resources. | |
1821 | * Otherwise, clean up the estimate to include dropped eps. | |
1822 | */ | |
1823 | if (ret) | |
1824 | xhci_free_host_resources(xhci, in_ctx); | |
1825 | else | |
1826 | xhci_finish_resource_reservation(xhci, in_ctx); | |
1827 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1828 | } | |
1829 | return ret; | |
f2217e8e SS |
1830 | } |
1831 | ||
f88ba78d SS |
1832 | /* Called after one or more calls to xhci_add_endpoint() or |
1833 | * xhci_drop_endpoint(). If this call fails, the USB core is expected | |
1834 | * to call xhci_reset_bandwidth(). | |
1835 | * | |
1836 | * Since we are in the middle of changing either configuration or | |
1837 | * installing a new alt setting, the USB core won't allow URBs to be | |
1838 | * enqueued for any endpoint on the old config or interface. Nothing | |
1839 | * else should be touching the xhci->devs[slot_id] structure, so we | |
1840 | * don't need to take the xhci->lock for manipulating that. | |
1841 | */ | |
f94e0186 SS |
1842 | int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) |
1843 | { | |
1844 | int i; | |
1845 | int ret = 0; | |
f94e0186 SS |
1846 | struct xhci_hcd *xhci; |
1847 | struct xhci_virt_device *virt_dev; | |
d115b048 JY |
1848 | struct xhci_input_control_ctx *ctrl_ctx; |
1849 | struct xhci_slot_ctx *slot_ctx; | |
f94e0186 | 1850 | |
64927730 | 1851 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
f94e0186 SS |
1852 | if (ret <= 0) |
1853 | return ret; | |
1854 | xhci = hcd_to_xhci(hcd); | |
fe6c6c13 SS |
1855 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1856 | return -ENODEV; | |
f94e0186 | 1857 | |
700e2052 | 1858 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
1859 | virt_dev = xhci->devs[udev->slot_id]; |
1860 | ||
1861 | /* See section 4.6.6 - A0 = 1; A1 = D0 = D1 = 0 */ | |
d115b048 | 1862 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
28ccd296 ME |
1863 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
1864 | ctrl_ctx->add_flags &= cpu_to_le32(~EP0_FLAG); | |
1865 | ctrl_ctx->drop_flags &= cpu_to_le32(~(SLOT_FLAG | EP0_FLAG)); | |
f94e0186 | 1866 | xhci_dbg(xhci, "New Input Control Context:\n"); |
d115b048 JY |
1867 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
1868 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, | |
28ccd296 | 1869 | LAST_CTX_TO_EP_NUM(le32_to_cpu(slot_ctx->dev_info))); |
f94e0186 | 1870 | |
913a8a34 SS |
1871 | ret = xhci_configure_endpoint(xhci, udev, NULL, |
1872 | false, false); | |
f94e0186 SS |
1873 | if (ret) { |
1874 | /* Callee should call reset_bandwidth() */ | |
f94e0186 SS |
1875 | return ret; |
1876 | } | |
1877 | ||
1878 | xhci_dbg(xhci, "Output context after successful config ep cmd:\n"); | |
d115b048 | 1879 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, |
28ccd296 | 1880 | LAST_CTX_TO_EP_NUM(le32_to_cpu(slot_ctx->dev_info))); |
f94e0186 | 1881 | |
834cb0fc SS |
1882 | /* Free any rings that were dropped, but not changed. */ |
1883 | for (i = 1; i < 31; ++i) { | |
4819fef5 ME |
1884 | if ((le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1))) && |
1885 | !(le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1)))) | |
834cb0fc SS |
1886 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); |
1887 | } | |
d115b048 | 1888 | xhci_zero_in_ctx(xhci, virt_dev); |
834cb0fc SS |
1889 | /* |
1890 | * Install any rings for completely new endpoints or changed endpoints, | |
1891 | * and free or cache any old rings from changed endpoints. | |
1892 | */ | |
f94e0186 | 1893 | for (i = 1; i < 31; ++i) { |
74f9fe21 SS |
1894 | if (!virt_dev->eps[i].new_ring) |
1895 | continue; | |
1896 | /* Only cache or free the old ring if it exists. | |
1897 | * It may not if this is the first add of an endpoint. | |
1898 | */ | |
1899 | if (virt_dev->eps[i].ring) { | |
412566bd | 1900 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); |
f94e0186 | 1901 | } |
74f9fe21 SS |
1902 | virt_dev->eps[i].ring = virt_dev->eps[i].new_ring; |
1903 | virt_dev->eps[i].new_ring = NULL; | |
f94e0186 SS |
1904 | } |
1905 | ||
f94e0186 SS |
1906 | return ret; |
1907 | } | |
1908 | ||
1909 | void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) | |
1910 | { | |
f94e0186 SS |
1911 | struct xhci_hcd *xhci; |
1912 | struct xhci_virt_device *virt_dev; | |
1913 | int i, ret; | |
1914 | ||
64927730 | 1915 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
f94e0186 SS |
1916 | if (ret <= 0) |
1917 | return; | |
1918 | xhci = hcd_to_xhci(hcd); | |
1919 | ||
700e2052 | 1920 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
1921 | virt_dev = xhci->devs[udev->slot_id]; |
1922 | /* Free any rings allocated for added endpoints */ | |
1923 | for (i = 0; i < 31; ++i) { | |
63a0d9ab SS |
1924 | if (virt_dev->eps[i].new_ring) { |
1925 | xhci_ring_free(xhci, virt_dev->eps[i].new_ring); | |
1926 | virt_dev->eps[i].new_ring = NULL; | |
f94e0186 SS |
1927 | } |
1928 | } | |
d115b048 | 1929 | xhci_zero_in_ctx(xhci, virt_dev); |
f94e0186 SS |
1930 | } |
1931 | ||
5270b951 | 1932 | static void xhci_setup_input_ctx_for_config_ep(struct xhci_hcd *xhci, |
913a8a34 SS |
1933 | struct xhci_container_ctx *in_ctx, |
1934 | struct xhci_container_ctx *out_ctx, | |
1935 | u32 add_flags, u32 drop_flags) | |
5270b951 SS |
1936 | { |
1937 | struct xhci_input_control_ctx *ctrl_ctx; | |
913a8a34 | 1938 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); |
28ccd296 ME |
1939 | ctrl_ctx->add_flags = cpu_to_le32(add_flags); |
1940 | ctrl_ctx->drop_flags = cpu_to_le32(drop_flags); | |
913a8a34 | 1941 | xhci_slot_copy(xhci, in_ctx, out_ctx); |
28ccd296 | 1942 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
5270b951 | 1943 | |
913a8a34 SS |
1944 | xhci_dbg(xhci, "Input Context:\n"); |
1945 | xhci_dbg_ctx(xhci, in_ctx, xhci_last_valid_endpoint(add_flags)); | |
5270b951 SS |
1946 | } |
1947 | ||
8212a49d | 1948 | static void xhci_setup_input_ctx_for_quirk(struct xhci_hcd *xhci, |
ac9d8fe7 SS |
1949 | unsigned int slot_id, unsigned int ep_index, |
1950 | struct xhci_dequeue_state *deq_state) | |
1951 | { | |
1952 | struct xhci_container_ctx *in_ctx; | |
ac9d8fe7 SS |
1953 | struct xhci_ep_ctx *ep_ctx; |
1954 | u32 added_ctxs; | |
1955 | dma_addr_t addr; | |
1956 | ||
913a8a34 SS |
1957 | xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, |
1958 | xhci->devs[slot_id]->out_ctx, ep_index); | |
ac9d8fe7 SS |
1959 | in_ctx = xhci->devs[slot_id]->in_ctx; |
1960 | ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); | |
1961 | addr = xhci_trb_virt_to_dma(deq_state->new_deq_seg, | |
1962 | deq_state->new_deq_ptr); | |
1963 | if (addr == 0) { | |
1964 | xhci_warn(xhci, "WARN Cannot submit config ep after " | |
1965 | "reset ep command\n"); | |
1966 | xhci_warn(xhci, "WARN deq seg = %p, deq ptr = %p\n", | |
1967 | deq_state->new_deq_seg, | |
1968 | deq_state->new_deq_ptr); | |
1969 | return; | |
1970 | } | |
28ccd296 | 1971 | ep_ctx->deq = cpu_to_le64(addr | deq_state->new_cycle_state); |
ac9d8fe7 | 1972 | |
ac9d8fe7 | 1973 | added_ctxs = xhci_get_endpoint_flag_from_index(ep_index); |
913a8a34 SS |
1974 | xhci_setup_input_ctx_for_config_ep(xhci, xhci->devs[slot_id]->in_ctx, |
1975 | xhci->devs[slot_id]->out_ctx, added_ctxs, added_ctxs); | |
ac9d8fe7 SS |
1976 | } |
1977 | ||
82d1009f | 1978 | void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci, |
63a0d9ab | 1979 | struct usb_device *udev, unsigned int ep_index) |
82d1009f SS |
1980 | { |
1981 | struct xhci_dequeue_state deq_state; | |
63a0d9ab | 1982 | struct xhci_virt_ep *ep; |
82d1009f SS |
1983 | |
1984 | xhci_dbg(xhci, "Cleaning up stalled endpoint ring\n"); | |
63a0d9ab | 1985 | ep = &xhci->devs[udev->slot_id]->eps[ep_index]; |
82d1009f SS |
1986 | /* We need to move the HW's dequeue pointer past this TD, |
1987 | * or it will attempt to resend it on the next doorbell ring. | |
1988 | */ | |
1989 | xhci_find_new_dequeue_state(xhci, udev->slot_id, | |
e9df17eb | 1990 | ep_index, ep->stopped_stream, ep->stopped_td, |
ac9d8fe7 | 1991 | &deq_state); |
82d1009f | 1992 | |
ac9d8fe7 SS |
1993 | /* HW with the reset endpoint quirk will use the saved dequeue state to |
1994 | * issue a configure endpoint command later. | |
1995 | */ | |
1996 | if (!(xhci->quirks & XHCI_RESET_EP_QUIRK)) { | |
1997 | xhci_dbg(xhci, "Queueing new dequeue state\n"); | |
63a0d9ab | 1998 | xhci_queue_new_dequeue_state(xhci, udev->slot_id, |
e9df17eb | 1999 | ep_index, ep->stopped_stream, &deq_state); |
ac9d8fe7 SS |
2000 | } else { |
2001 | /* Better hope no one uses the input context between now and the | |
2002 | * reset endpoint completion! | |
e9df17eb SS |
2003 | * XXX: No idea how this hardware will react when stream rings |
2004 | * are enabled. | |
ac9d8fe7 SS |
2005 | */ |
2006 | xhci_dbg(xhci, "Setting up input context for " | |
2007 | "configure endpoint command\n"); | |
2008 | xhci_setup_input_ctx_for_quirk(xhci, udev->slot_id, | |
2009 | ep_index, &deq_state); | |
2010 | } | |
82d1009f SS |
2011 | } |
2012 | ||
a1587d97 SS |
2013 | /* Deal with stalled endpoints. The core should have sent the control message |
2014 | * to clear the halt condition. However, we need to make the xHCI hardware | |
2015 | * reset its sequence number, since a device will expect a sequence number of | |
2016 | * zero after the halt condition is cleared. | |
2017 | * Context: in_interrupt | |
2018 | */ | |
2019 | void xhci_endpoint_reset(struct usb_hcd *hcd, | |
2020 | struct usb_host_endpoint *ep) | |
2021 | { | |
2022 | struct xhci_hcd *xhci; | |
2023 | struct usb_device *udev; | |
2024 | unsigned int ep_index; | |
2025 | unsigned long flags; | |
2026 | int ret; | |
63a0d9ab | 2027 | struct xhci_virt_ep *virt_ep; |
a1587d97 SS |
2028 | |
2029 | xhci = hcd_to_xhci(hcd); | |
2030 | udev = (struct usb_device *) ep->hcpriv; | |
2031 | /* Called with a root hub endpoint (or an endpoint that wasn't added | |
2032 | * with xhci_add_endpoint() | |
2033 | */ | |
2034 | if (!ep->hcpriv) | |
2035 | return; | |
2036 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
63a0d9ab SS |
2037 | virt_ep = &xhci->devs[udev->slot_id]->eps[ep_index]; |
2038 | if (!virt_ep->stopped_td) { | |
c92bcfa7 SS |
2039 | xhci_dbg(xhci, "Endpoint 0x%x not halted, refusing to reset.\n", |
2040 | ep->desc.bEndpointAddress); | |
2041 | return; | |
2042 | } | |
82d1009f SS |
2043 | if (usb_endpoint_xfer_control(&ep->desc)) { |
2044 | xhci_dbg(xhci, "Control endpoint stall already handled.\n"); | |
2045 | return; | |
2046 | } | |
a1587d97 SS |
2047 | |
2048 | xhci_dbg(xhci, "Queueing reset endpoint command\n"); | |
2049 | spin_lock_irqsave(&xhci->lock, flags); | |
2050 | ret = xhci_queue_reset_ep(xhci, udev->slot_id, ep_index); | |
c92bcfa7 SS |
2051 | /* |
2052 | * Can't change the ring dequeue pointer until it's transitioned to the | |
2053 | * stopped state, which is only upon a successful reset endpoint | |
2054 | * command. Better hope that last command worked! | |
2055 | */ | |
a1587d97 | 2056 | if (!ret) { |
63a0d9ab SS |
2057 | xhci_cleanup_stalled_ring(xhci, udev, ep_index); |
2058 | kfree(virt_ep->stopped_td); | |
a1587d97 SS |
2059 | xhci_ring_cmd_db(xhci); |
2060 | } | |
1624ae1c SS |
2061 | virt_ep->stopped_td = NULL; |
2062 | virt_ep->stopped_trb = NULL; | |
5e5cf6fc | 2063 | virt_ep->stopped_stream = 0; |
a1587d97 SS |
2064 | spin_unlock_irqrestore(&xhci->lock, flags); |
2065 | ||
2066 | if (ret) | |
2067 | xhci_warn(xhci, "FIXME allocate a new ring segment\n"); | |
2068 | } | |
2069 | ||
8df75f42 SS |
2070 | static int xhci_check_streams_endpoint(struct xhci_hcd *xhci, |
2071 | struct usb_device *udev, struct usb_host_endpoint *ep, | |
2072 | unsigned int slot_id) | |
2073 | { | |
2074 | int ret; | |
2075 | unsigned int ep_index; | |
2076 | unsigned int ep_state; | |
2077 | ||
2078 | if (!ep) | |
2079 | return -EINVAL; | |
64927730 | 2080 | ret = xhci_check_args(xhci_to_hcd(xhci), udev, ep, 1, true, __func__); |
8df75f42 SS |
2081 | if (ret <= 0) |
2082 | return -EINVAL; | |
842f1690 | 2083 | if (ep->ss_ep_comp.bmAttributes == 0) { |
8df75f42 SS |
2084 | xhci_warn(xhci, "WARN: SuperSpeed Endpoint Companion" |
2085 | " descriptor for ep 0x%x does not support streams\n", | |
2086 | ep->desc.bEndpointAddress); | |
2087 | return -EINVAL; | |
2088 | } | |
2089 | ||
2090 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
2091 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; | |
2092 | if (ep_state & EP_HAS_STREAMS || | |
2093 | ep_state & EP_GETTING_STREAMS) { | |
2094 | xhci_warn(xhci, "WARN: SuperSpeed bulk endpoint 0x%x " | |
2095 | "already has streams set up.\n", | |
2096 | ep->desc.bEndpointAddress); | |
2097 | xhci_warn(xhci, "Send email to xHCI maintainer and ask for " | |
2098 | "dynamic stream context array reallocation.\n"); | |
2099 | return -EINVAL; | |
2100 | } | |
2101 | if (!list_empty(&xhci->devs[slot_id]->eps[ep_index].ring->td_list)) { | |
2102 | xhci_warn(xhci, "Cannot setup streams for SuperSpeed bulk " | |
2103 | "endpoint 0x%x; URBs are pending.\n", | |
2104 | ep->desc.bEndpointAddress); | |
2105 | return -EINVAL; | |
2106 | } | |
2107 | return 0; | |
2108 | } | |
2109 | ||
2110 | static void xhci_calculate_streams_entries(struct xhci_hcd *xhci, | |
2111 | unsigned int *num_streams, unsigned int *num_stream_ctxs) | |
2112 | { | |
2113 | unsigned int max_streams; | |
2114 | ||
2115 | /* The stream context array size must be a power of two */ | |
2116 | *num_stream_ctxs = roundup_pow_of_two(*num_streams); | |
2117 | /* | |
2118 | * Find out how many primary stream array entries the host controller | |
2119 | * supports. Later we may use secondary stream arrays (similar to 2nd | |
2120 | * level page entries), but that's an optional feature for xHCI host | |
2121 | * controllers. xHCs must support at least 4 stream IDs. | |
2122 | */ | |
2123 | max_streams = HCC_MAX_PSA(xhci->hcc_params); | |
2124 | if (*num_stream_ctxs > max_streams) { | |
2125 | xhci_dbg(xhci, "xHCI HW only supports %u stream ctx entries.\n", | |
2126 | max_streams); | |
2127 | *num_stream_ctxs = max_streams; | |
2128 | *num_streams = max_streams; | |
2129 | } | |
2130 | } | |
2131 | ||
2132 | /* Returns an error code if one of the endpoint already has streams. | |
2133 | * This does not change any data structures, it only checks and gathers | |
2134 | * information. | |
2135 | */ | |
2136 | static int xhci_calculate_streams_and_bitmask(struct xhci_hcd *xhci, | |
2137 | struct usb_device *udev, | |
2138 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2139 | unsigned int *num_streams, u32 *changed_ep_bitmask) | |
2140 | { | |
8df75f42 SS |
2141 | unsigned int max_streams; |
2142 | unsigned int endpoint_flag; | |
2143 | int i; | |
2144 | int ret; | |
2145 | ||
2146 | for (i = 0; i < num_eps; i++) { | |
2147 | ret = xhci_check_streams_endpoint(xhci, udev, | |
2148 | eps[i], udev->slot_id); | |
2149 | if (ret < 0) | |
2150 | return ret; | |
2151 | ||
842f1690 AS |
2152 | max_streams = USB_SS_MAX_STREAMS( |
2153 | eps[i]->ss_ep_comp.bmAttributes); | |
8df75f42 SS |
2154 | if (max_streams < (*num_streams - 1)) { |
2155 | xhci_dbg(xhci, "Ep 0x%x only supports %u stream IDs.\n", | |
2156 | eps[i]->desc.bEndpointAddress, | |
2157 | max_streams); | |
2158 | *num_streams = max_streams+1; | |
2159 | } | |
2160 | ||
2161 | endpoint_flag = xhci_get_endpoint_flag(&eps[i]->desc); | |
2162 | if (*changed_ep_bitmask & endpoint_flag) | |
2163 | return -EINVAL; | |
2164 | *changed_ep_bitmask |= endpoint_flag; | |
2165 | } | |
2166 | return 0; | |
2167 | } | |
2168 | ||
2169 | static u32 xhci_calculate_no_streams_bitmask(struct xhci_hcd *xhci, | |
2170 | struct usb_device *udev, | |
2171 | struct usb_host_endpoint **eps, unsigned int num_eps) | |
2172 | { | |
2173 | u32 changed_ep_bitmask = 0; | |
2174 | unsigned int slot_id; | |
2175 | unsigned int ep_index; | |
2176 | unsigned int ep_state; | |
2177 | int i; | |
2178 | ||
2179 | slot_id = udev->slot_id; | |
2180 | if (!xhci->devs[slot_id]) | |
2181 | return 0; | |
2182 | ||
2183 | for (i = 0; i < num_eps; i++) { | |
2184 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2185 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; | |
2186 | /* Are streams already being freed for the endpoint? */ | |
2187 | if (ep_state & EP_GETTING_NO_STREAMS) { | |
2188 | xhci_warn(xhci, "WARN Can't disable streams for " | |
2189 | "endpoint 0x%x\n, " | |
2190 | "streams are being disabled already.", | |
2191 | eps[i]->desc.bEndpointAddress); | |
2192 | return 0; | |
2193 | } | |
2194 | /* Are there actually any streams to free? */ | |
2195 | if (!(ep_state & EP_HAS_STREAMS) && | |
2196 | !(ep_state & EP_GETTING_STREAMS)) { | |
2197 | xhci_warn(xhci, "WARN Can't disable streams for " | |
2198 | "endpoint 0x%x\n, " | |
2199 | "streams are already disabled!", | |
2200 | eps[i]->desc.bEndpointAddress); | |
2201 | xhci_warn(xhci, "WARN xhci_free_streams() called " | |
2202 | "with non-streams endpoint\n"); | |
2203 | return 0; | |
2204 | } | |
2205 | changed_ep_bitmask |= xhci_get_endpoint_flag(&eps[i]->desc); | |
2206 | } | |
2207 | return changed_ep_bitmask; | |
2208 | } | |
2209 | ||
2210 | /* | |
2211 | * The USB device drivers use this function (though the HCD interface in USB | |
2212 | * core) to prepare a set of bulk endpoints to use streams. Streams are used to | |
2213 | * coordinate mass storage command queueing across multiple endpoints (basically | |
2214 | * a stream ID == a task ID). | |
2215 | * | |
2216 | * Setting up streams involves allocating the same size stream context array | |
2217 | * for each endpoint and issuing a configure endpoint command for all endpoints. | |
2218 | * | |
2219 | * Don't allow the call to succeed if one endpoint only supports one stream | |
2220 | * (which means it doesn't support streams at all). | |
2221 | * | |
2222 | * Drivers may get less stream IDs than they asked for, if the host controller | |
2223 | * hardware or endpoints claim they can't support the number of requested | |
2224 | * stream IDs. | |
2225 | */ | |
2226 | int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, | |
2227 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2228 | unsigned int num_streams, gfp_t mem_flags) | |
2229 | { | |
2230 | int i, ret; | |
2231 | struct xhci_hcd *xhci; | |
2232 | struct xhci_virt_device *vdev; | |
2233 | struct xhci_command *config_cmd; | |
2234 | unsigned int ep_index; | |
2235 | unsigned int num_stream_ctxs; | |
2236 | unsigned long flags; | |
2237 | u32 changed_ep_bitmask = 0; | |
2238 | ||
2239 | if (!eps) | |
2240 | return -EINVAL; | |
2241 | ||
2242 | /* Add one to the number of streams requested to account for | |
2243 | * stream 0 that is reserved for xHCI usage. | |
2244 | */ | |
2245 | num_streams += 1; | |
2246 | xhci = hcd_to_xhci(hcd); | |
2247 | xhci_dbg(xhci, "Driver wants %u stream IDs (including stream 0).\n", | |
2248 | num_streams); | |
2249 | ||
2250 | config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); | |
2251 | if (!config_cmd) { | |
2252 | xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); | |
2253 | return -ENOMEM; | |
2254 | } | |
2255 | ||
2256 | /* Check to make sure all endpoints are not already configured for | |
2257 | * streams. While we're at it, find the maximum number of streams that | |
2258 | * all the endpoints will support and check for duplicate endpoints. | |
2259 | */ | |
2260 | spin_lock_irqsave(&xhci->lock, flags); | |
2261 | ret = xhci_calculate_streams_and_bitmask(xhci, udev, eps, | |
2262 | num_eps, &num_streams, &changed_ep_bitmask); | |
2263 | if (ret < 0) { | |
2264 | xhci_free_command(xhci, config_cmd); | |
2265 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2266 | return ret; | |
2267 | } | |
2268 | if (num_streams <= 1) { | |
2269 | xhci_warn(xhci, "WARN: endpoints can't handle " | |
2270 | "more than one stream.\n"); | |
2271 | xhci_free_command(xhci, config_cmd); | |
2272 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2273 | return -EINVAL; | |
2274 | } | |
2275 | vdev = xhci->devs[udev->slot_id]; | |
25985edc | 2276 | /* Mark each endpoint as being in transition, so |
8df75f42 SS |
2277 | * xhci_urb_enqueue() will reject all URBs. |
2278 | */ | |
2279 | for (i = 0; i < num_eps; i++) { | |
2280 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2281 | vdev->eps[ep_index].ep_state |= EP_GETTING_STREAMS; | |
2282 | } | |
2283 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2284 | ||
2285 | /* Setup internal data structures and allocate HW data structures for | |
2286 | * streams (but don't install the HW structures in the input context | |
2287 | * until we're sure all memory allocation succeeded). | |
2288 | */ | |
2289 | xhci_calculate_streams_entries(xhci, &num_streams, &num_stream_ctxs); | |
2290 | xhci_dbg(xhci, "Need %u stream ctx entries for %u stream IDs.\n", | |
2291 | num_stream_ctxs, num_streams); | |
2292 | ||
2293 | for (i = 0; i < num_eps; i++) { | |
2294 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2295 | vdev->eps[ep_index].stream_info = xhci_alloc_stream_info(xhci, | |
2296 | num_stream_ctxs, | |
2297 | num_streams, mem_flags); | |
2298 | if (!vdev->eps[ep_index].stream_info) | |
2299 | goto cleanup; | |
2300 | /* Set maxPstreams in endpoint context and update deq ptr to | |
2301 | * point to stream context array. FIXME | |
2302 | */ | |
2303 | } | |
2304 | ||
2305 | /* Set up the input context for a configure endpoint command. */ | |
2306 | for (i = 0; i < num_eps; i++) { | |
2307 | struct xhci_ep_ctx *ep_ctx; | |
2308 | ||
2309 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2310 | ep_ctx = xhci_get_ep_ctx(xhci, config_cmd->in_ctx, ep_index); | |
2311 | ||
2312 | xhci_endpoint_copy(xhci, config_cmd->in_ctx, | |
2313 | vdev->out_ctx, ep_index); | |
2314 | xhci_setup_streams_ep_input_ctx(xhci, ep_ctx, | |
2315 | vdev->eps[ep_index].stream_info); | |
2316 | } | |
2317 | /* Tell the HW to drop its old copy of the endpoint context info | |
2318 | * and add the updated copy from the input context. | |
2319 | */ | |
2320 | xhci_setup_input_ctx_for_config_ep(xhci, config_cmd->in_ctx, | |
2321 | vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); | |
2322 | ||
2323 | /* Issue and wait for the configure endpoint command */ | |
2324 | ret = xhci_configure_endpoint(xhci, udev, config_cmd, | |
2325 | false, false); | |
2326 | ||
2327 | /* xHC rejected the configure endpoint command for some reason, so we | |
2328 | * leave the old ring intact and free our internal streams data | |
2329 | * structure. | |
2330 | */ | |
2331 | if (ret < 0) | |
2332 | goto cleanup; | |
2333 | ||
2334 | spin_lock_irqsave(&xhci->lock, flags); | |
2335 | for (i = 0; i < num_eps; i++) { | |
2336 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2337 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; | |
2338 | xhci_dbg(xhci, "Slot %u ep ctx %u now has streams.\n", | |
2339 | udev->slot_id, ep_index); | |
2340 | vdev->eps[ep_index].ep_state |= EP_HAS_STREAMS; | |
2341 | } | |
2342 | xhci_free_command(xhci, config_cmd); | |
2343 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2344 | ||
2345 | /* Subtract 1 for stream 0, which drivers can't use */ | |
2346 | return num_streams - 1; | |
2347 | ||
2348 | cleanup: | |
2349 | /* If it didn't work, free the streams! */ | |
2350 | for (i = 0; i < num_eps; i++) { | |
2351 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2352 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); | |
8a007748 | 2353 | vdev->eps[ep_index].stream_info = NULL; |
8df75f42 SS |
2354 | /* FIXME Unset maxPstreams in endpoint context and |
2355 | * update deq ptr to point to normal string ring. | |
2356 | */ | |
2357 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; | |
2358 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; | |
2359 | xhci_endpoint_zero(xhci, vdev, eps[i]); | |
2360 | } | |
2361 | xhci_free_command(xhci, config_cmd); | |
2362 | return -ENOMEM; | |
2363 | } | |
2364 | ||
2365 | /* Transition the endpoint from using streams to being a "normal" endpoint | |
2366 | * without streams. | |
2367 | * | |
2368 | * Modify the endpoint context state, submit a configure endpoint command, | |
2369 | * and free all endpoint rings for streams if that completes successfully. | |
2370 | */ | |
2371 | int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev, | |
2372 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2373 | gfp_t mem_flags) | |
2374 | { | |
2375 | int i, ret; | |
2376 | struct xhci_hcd *xhci; | |
2377 | struct xhci_virt_device *vdev; | |
2378 | struct xhci_command *command; | |
2379 | unsigned int ep_index; | |
2380 | unsigned long flags; | |
2381 | u32 changed_ep_bitmask; | |
2382 | ||
2383 | xhci = hcd_to_xhci(hcd); | |
2384 | vdev = xhci->devs[udev->slot_id]; | |
2385 | ||
2386 | /* Set up a configure endpoint command to remove the streams rings */ | |
2387 | spin_lock_irqsave(&xhci->lock, flags); | |
2388 | changed_ep_bitmask = xhci_calculate_no_streams_bitmask(xhci, | |
2389 | udev, eps, num_eps); | |
2390 | if (changed_ep_bitmask == 0) { | |
2391 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2392 | return -EINVAL; | |
2393 | } | |
2394 | ||
2395 | /* Use the xhci_command structure from the first endpoint. We may have | |
2396 | * allocated too many, but the driver may call xhci_free_streams() for | |
2397 | * each endpoint it grouped into one call to xhci_alloc_streams(). | |
2398 | */ | |
2399 | ep_index = xhci_get_endpoint_index(&eps[0]->desc); | |
2400 | command = vdev->eps[ep_index].stream_info->free_streams_command; | |
2401 | for (i = 0; i < num_eps; i++) { | |
2402 | struct xhci_ep_ctx *ep_ctx; | |
2403 | ||
2404 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2405 | ep_ctx = xhci_get_ep_ctx(xhci, command->in_ctx, ep_index); | |
2406 | xhci->devs[udev->slot_id]->eps[ep_index].ep_state |= | |
2407 | EP_GETTING_NO_STREAMS; | |
2408 | ||
2409 | xhci_endpoint_copy(xhci, command->in_ctx, | |
2410 | vdev->out_ctx, ep_index); | |
2411 | xhci_setup_no_streams_ep_input_ctx(xhci, ep_ctx, | |
2412 | &vdev->eps[ep_index]); | |
2413 | } | |
2414 | xhci_setup_input_ctx_for_config_ep(xhci, command->in_ctx, | |
2415 | vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); | |
2416 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2417 | ||
2418 | /* Issue and wait for the configure endpoint command, | |
2419 | * which must succeed. | |
2420 | */ | |
2421 | ret = xhci_configure_endpoint(xhci, udev, command, | |
2422 | false, true); | |
2423 | ||
2424 | /* xHC rejected the configure endpoint command for some reason, so we | |
2425 | * leave the streams rings intact. | |
2426 | */ | |
2427 | if (ret < 0) | |
2428 | return ret; | |
2429 | ||
2430 | spin_lock_irqsave(&xhci->lock, flags); | |
2431 | for (i = 0; i < num_eps; i++) { | |
2432 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2433 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); | |
8a007748 | 2434 | vdev->eps[ep_index].stream_info = NULL; |
8df75f42 SS |
2435 | /* FIXME Unset maxPstreams in endpoint context and |
2436 | * update deq ptr to point to normal string ring. | |
2437 | */ | |
2438 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_NO_STREAMS; | |
2439 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; | |
2440 | } | |
2441 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2442 | ||
2443 | return 0; | |
2444 | } | |
2445 | ||
2cf95c18 SS |
2446 | /* |
2447 | * Deletes endpoint resources for endpoints that were active before a Reset | |
2448 | * Device command, or a Disable Slot command. The Reset Device command leaves | |
2449 | * the control endpoint intact, whereas the Disable Slot command deletes it. | |
2450 | * | |
2451 | * Must be called with xhci->lock held. | |
2452 | */ | |
2453 | void xhci_free_device_endpoint_resources(struct xhci_hcd *xhci, | |
2454 | struct xhci_virt_device *virt_dev, bool drop_control_ep) | |
2455 | { | |
2456 | int i; | |
2457 | unsigned int num_dropped_eps = 0; | |
2458 | unsigned int drop_flags = 0; | |
2459 | ||
2460 | for (i = (drop_control_ep ? 0 : 1); i < 31; i++) { | |
2461 | if (virt_dev->eps[i].ring) { | |
2462 | drop_flags |= 1 << i; | |
2463 | num_dropped_eps++; | |
2464 | } | |
2465 | } | |
2466 | xhci->num_active_eps -= num_dropped_eps; | |
2467 | if (num_dropped_eps) | |
2468 | xhci_dbg(xhci, "Dropped %u ep ctxs, flags = 0x%x, " | |
2469 | "%u now active.\n", | |
2470 | num_dropped_eps, drop_flags, | |
2471 | xhci->num_active_eps); | |
2472 | } | |
2473 | ||
2a8f82c4 SS |
2474 | /* |
2475 | * This submits a Reset Device Command, which will set the device state to 0, | |
2476 | * set the device address to 0, and disable all the endpoints except the default | |
2477 | * control endpoint. The USB core should come back and call | |
2478 | * xhci_address_device(), and then re-set up the configuration. If this is | |
2479 | * called because of a usb_reset_and_verify_device(), then the old alternate | |
2480 | * settings will be re-installed through the normal bandwidth allocation | |
2481 | * functions. | |
2482 | * | |
2483 | * Wait for the Reset Device command to finish. Remove all structures | |
2484 | * associated with the endpoints that were disabled. Clear the input device | |
2485 | * structure? Cache the rings? Reset the control endpoint 0 max packet size? | |
f0615c45 AX |
2486 | * |
2487 | * If the virt_dev to be reset does not exist or does not match the udev, | |
2488 | * it means the device is lost, possibly due to the xHC restore error and | |
2489 | * re-initialization during S3/S4. In this case, call xhci_alloc_dev() to | |
2490 | * re-allocate the device. | |
2a8f82c4 | 2491 | */ |
f0615c45 | 2492 | int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev) |
2a8f82c4 SS |
2493 | { |
2494 | int ret, i; | |
2495 | unsigned long flags; | |
2496 | struct xhci_hcd *xhci; | |
2497 | unsigned int slot_id; | |
2498 | struct xhci_virt_device *virt_dev; | |
2499 | struct xhci_command *reset_device_cmd; | |
2500 | int timeleft; | |
2501 | int last_freed_endpoint; | |
001fd382 | 2502 | struct xhci_slot_ctx *slot_ctx; |
2a8f82c4 | 2503 | |
f0615c45 | 2504 | ret = xhci_check_args(hcd, udev, NULL, 0, false, __func__); |
2a8f82c4 SS |
2505 | if (ret <= 0) |
2506 | return ret; | |
2507 | xhci = hcd_to_xhci(hcd); | |
2508 | slot_id = udev->slot_id; | |
2509 | virt_dev = xhci->devs[slot_id]; | |
f0615c45 AX |
2510 | if (!virt_dev) { |
2511 | xhci_dbg(xhci, "The device to be reset with slot ID %u does " | |
2512 | "not exist. Re-allocate the device\n", slot_id); | |
2513 | ret = xhci_alloc_dev(hcd, udev); | |
2514 | if (ret == 1) | |
2515 | return 0; | |
2516 | else | |
2517 | return -EINVAL; | |
2518 | } | |
2519 | ||
2520 | if (virt_dev->udev != udev) { | |
2521 | /* If the virt_dev and the udev does not match, this virt_dev | |
2522 | * may belong to another udev. | |
2523 | * Re-allocate the device. | |
2524 | */ | |
2525 | xhci_dbg(xhci, "The device to be reset with slot ID %u does " | |
2526 | "not match the udev. Re-allocate the device\n", | |
2527 | slot_id); | |
2528 | ret = xhci_alloc_dev(hcd, udev); | |
2529 | if (ret == 1) | |
2530 | return 0; | |
2531 | else | |
2532 | return -EINVAL; | |
2533 | } | |
2a8f82c4 | 2534 | |
001fd382 ML |
2535 | /* If device is not setup, there is no point in resetting it */ |
2536 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); | |
2537 | if (GET_SLOT_STATE(le32_to_cpu(slot_ctx->dev_state)) == | |
2538 | SLOT_STATE_DISABLED) | |
2539 | return 0; | |
2540 | ||
2a8f82c4 SS |
2541 | xhci_dbg(xhci, "Resetting device with slot ID %u\n", slot_id); |
2542 | /* Allocate the command structure that holds the struct completion. | |
2543 | * Assume we're in process context, since the normal device reset | |
2544 | * process has to wait for the device anyway. Storage devices are | |
2545 | * reset as part of error handling, so use GFP_NOIO instead of | |
2546 | * GFP_KERNEL. | |
2547 | */ | |
2548 | reset_device_cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO); | |
2549 | if (!reset_device_cmd) { | |
2550 | xhci_dbg(xhci, "Couldn't allocate command structure.\n"); | |
2551 | return -ENOMEM; | |
2552 | } | |
2553 | ||
2554 | /* Attempt to submit the Reset Device command to the command ring */ | |
2555 | spin_lock_irqsave(&xhci->lock, flags); | |
2556 | reset_device_cmd->command_trb = xhci->cmd_ring->enqueue; | |
7a3783ef PZ |
2557 | |
2558 | /* Enqueue pointer can be left pointing to the link TRB, | |
2559 | * we must handle that | |
2560 | */ | |
f5960b69 | 2561 | if (TRB_TYPE_LINK_LE32(reset_device_cmd->command_trb->link.control)) |
7a3783ef PZ |
2562 | reset_device_cmd->command_trb = |
2563 | xhci->cmd_ring->enq_seg->next->trbs; | |
2564 | ||
2a8f82c4 SS |
2565 | list_add_tail(&reset_device_cmd->cmd_list, &virt_dev->cmd_list); |
2566 | ret = xhci_queue_reset_device(xhci, slot_id); | |
2567 | if (ret) { | |
2568 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
2569 | list_del(&reset_device_cmd->cmd_list); | |
2570 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2571 | goto command_cleanup; | |
2572 | } | |
2573 | xhci_ring_cmd_db(xhci); | |
2574 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2575 | ||
2576 | /* Wait for the Reset Device command to finish */ | |
2577 | timeleft = wait_for_completion_interruptible_timeout( | |
2578 | reset_device_cmd->completion, | |
2579 | USB_CTRL_SET_TIMEOUT); | |
2580 | if (timeleft <= 0) { | |
2581 | xhci_warn(xhci, "%s while waiting for reset device command\n", | |
2582 | timeleft == 0 ? "Timeout" : "Signal"); | |
2583 | spin_lock_irqsave(&xhci->lock, flags); | |
2584 | /* The timeout might have raced with the event ring handler, so | |
2585 | * only delete from the list if the item isn't poisoned. | |
2586 | */ | |
2587 | if (reset_device_cmd->cmd_list.next != LIST_POISON1) | |
2588 | list_del(&reset_device_cmd->cmd_list); | |
2589 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2590 | ret = -ETIME; | |
2591 | goto command_cleanup; | |
2592 | } | |
2593 | ||
2594 | /* The Reset Device command can't fail, according to the 0.95/0.96 spec, | |
2595 | * unless we tried to reset a slot ID that wasn't enabled, | |
2596 | * or the device wasn't in the addressed or configured state. | |
2597 | */ | |
2598 | ret = reset_device_cmd->status; | |
2599 | switch (ret) { | |
2600 | case COMP_EBADSLT: /* 0.95 completion code for bad slot ID */ | |
2601 | case COMP_CTX_STATE: /* 0.96 completion code for same thing */ | |
2602 | xhci_info(xhci, "Can't reset device (slot ID %u) in %s state\n", | |
2603 | slot_id, | |
2604 | xhci_get_slot_state(xhci, virt_dev->out_ctx)); | |
2605 | xhci_info(xhci, "Not freeing device rings.\n"); | |
2606 | /* Don't treat this as an error. May change my mind later. */ | |
2607 | ret = 0; | |
2608 | goto command_cleanup; | |
2609 | case COMP_SUCCESS: | |
2610 | xhci_dbg(xhci, "Successful reset device command.\n"); | |
2611 | break; | |
2612 | default: | |
2613 | if (xhci_is_vendor_info_code(xhci, ret)) | |
2614 | break; | |
2615 | xhci_warn(xhci, "Unknown completion code %u for " | |
2616 | "reset device command.\n", ret); | |
2617 | ret = -EINVAL; | |
2618 | goto command_cleanup; | |
2619 | } | |
2620 | ||
2cf95c18 SS |
2621 | /* Free up host controller endpoint resources */ |
2622 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { | |
2623 | spin_lock_irqsave(&xhci->lock, flags); | |
2624 | /* Don't delete the default control endpoint resources */ | |
2625 | xhci_free_device_endpoint_resources(xhci, virt_dev, false); | |
2626 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2627 | } | |
2628 | ||
2a8f82c4 SS |
2629 | /* Everything but endpoint 0 is disabled, so free or cache the rings. */ |
2630 | last_freed_endpoint = 1; | |
2631 | for (i = 1; i < 31; ++i) { | |
2dea75d9 DT |
2632 | struct xhci_virt_ep *ep = &virt_dev->eps[i]; |
2633 | ||
2634 | if (ep->ep_state & EP_HAS_STREAMS) { | |
2635 | xhci_free_stream_info(xhci, ep->stream_info); | |
2636 | ep->stream_info = NULL; | |
2637 | ep->ep_state &= ~EP_HAS_STREAMS; | |
2638 | } | |
2639 | ||
2640 | if (ep->ring) { | |
2641 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); | |
2642 | last_freed_endpoint = i; | |
2643 | } | |
2a8f82c4 SS |
2644 | } |
2645 | xhci_dbg(xhci, "Output context after successful reset device cmd:\n"); | |
2646 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, last_freed_endpoint); | |
2647 | ret = 0; | |
2648 | ||
2649 | command_cleanup: | |
2650 | xhci_free_command(xhci, reset_device_cmd); | |
2651 | return ret; | |
2652 | } | |
2653 | ||
3ffbba95 SS |
2654 | /* |
2655 | * At this point, the struct usb_device is about to go away, the device has | |
2656 | * disconnected, and all traffic has been stopped and the endpoints have been | |
2657 | * disabled. Free any HC data structures associated with that device. | |
2658 | */ | |
2659 | void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev) | |
2660 | { | |
2661 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
6f5165cf | 2662 | struct xhci_virt_device *virt_dev; |
3ffbba95 | 2663 | unsigned long flags; |
c526d0d4 | 2664 | u32 state; |
64927730 | 2665 | int i, ret; |
3ffbba95 | 2666 | |
64927730 AX |
2667 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
2668 | if (ret <= 0) | |
3ffbba95 | 2669 | return; |
64927730 | 2670 | |
6f5165cf | 2671 | virt_dev = xhci->devs[udev->slot_id]; |
6f5165cf SS |
2672 | |
2673 | /* Stop any wayward timer functions (which may grab the lock) */ | |
2674 | for (i = 0; i < 31; ++i) { | |
2675 | virt_dev->eps[i].ep_state &= ~EP_HALT_PENDING; | |
2676 | del_timer_sync(&virt_dev->eps[i].stop_cmd_timer); | |
2677 | } | |
3ffbba95 SS |
2678 | |
2679 | spin_lock_irqsave(&xhci->lock, flags); | |
c526d0d4 SS |
2680 | /* Don't disable the slot if the host controller is dead. */ |
2681 | state = xhci_readl(xhci, &xhci->op_regs->status); | |
6f5165cf | 2682 | if (state == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) { |
c526d0d4 SS |
2683 | xhci_free_virt_device(xhci, udev->slot_id); |
2684 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2685 | return; | |
2686 | } | |
2687 | ||
23e3be11 | 2688 | if (xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) { |
3ffbba95 SS |
2689 | spin_unlock_irqrestore(&xhci->lock, flags); |
2690 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
2691 | return; | |
2692 | } | |
23e3be11 | 2693 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
2694 | spin_unlock_irqrestore(&xhci->lock, flags); |
2695 | /* | |
2696 | * Event command completion handler will free any data structures | |
f88ba78d | 2697 | * associated with the slot. XXX Can free sleep? |
3ffbba95 SS |
2698 | */ |
2699 | } | |
2700 | ||
2cf95c18 SS |
2701 | /* |
2702 | * Checks if we have enough host controller resources for the default control | |
2703 | * endpoint. | |
2704 | * | |
2705 | * Must be called with xhci->lock held. | |
2706 | */ | |
2707 | static int xhci_reserve_host_control_ep_resources(struct xhci_hcd *xhci) | |
2708 | { | |
2709 | if (xhci->num_active_eps + 1 > xhci->limit_active_eps) { | |
2710 | xhci_dbg(xhci, "Not enough ep ctxs: " | |
2711 | "%u active, need to add 1, limit is %u.\n", | |
2712 | xhci->num_active_eps, xhci->limit_active_eps); | |
2713 | return -ENOMEM; | |
2714 | } | |
2715 | xhci->num_active_eps += 1; | |
2716 | xhci_dbg(xhci, "Adding 1 ep ctx, %u now active.\n", | |
2717 | xhci->num_active_eps); | |
2718 | return 0; | |
2719 | } | |
2720 | ||
2721 | ||
3ffbba95 SS |
2722 | /* |
2723 | * Returns 0 if the xHC ran out of device slots, the Enable Slot command | |
2724 | * timed out, or allocating memory failed. Returns 1 on success. | |
2725 | */ | |
2726 | int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev) | |
2727 | { | |
2728 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
2729 | unsigned long flags; | |
2730 | int timeleft; | |
2731 | int ret; | |
2732 | ||
2733 | spin_lock_irqsave(&xhci->lock, flags); | |
23e3be11 | 2734 | ret = xhci_queue_slot_control(xhci, TRB_ENABLE_SLOT, 0); |
3ffbba95 SS |
2735 | if (ret) { |
2736 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2737 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
2738 | return 0; | |
2739 | } | |
23e3be11 | 2740 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
2741 | spin_unlock_irqrestore(&xhci->lock, flags); |
2742 | ||
2743 | /* XXX: how much time for xHC slot assignment? */ | |
2744 | timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, | |
2745 | USB_CTRL_SET_TIMEOUT); | |
2746 | if (timeleft <= 0) { | |
2747 | xhci_warn(xhci, "%s while waiting for a slot\n", | |
2748 | timeleft == 0 ? "Timeout" : "Signal"); | |
2749 | /* FIXME cancel the enable slot request */ | |
2750 | return 0; | |
2751 | } | |
2752 | ||
3ffbba95 SS |
2753 | if (!xhci->slot_id) { |
2754 | xhci_err(xhci, "Error while assigning device slot ID\n"); | |
3ffbba95 SS |
2755 | return 0; |
2756 | } | |
2cf95c18 SS |
2757 | |
2758 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { | |
2759 | spin_lock_irqsave(&xhci->lock, flags); | |
2760 | ret = xhci_reserve_host_control_ep_resources(xhci); | |
2761 | if (ret) { | |
2762 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2763 | xhci_warn(xhci, "Not enough host resources, " | |
2764 | "active endpoint contexts = %u\n", | |
2765 | xhci->num_active_eps); | |
2766 | goto disable_slot; | |
2767 | } | |
2768 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2769 | } | |
2770 | /* Use GFP_NOIO, since this function can be called from | |
a6d940dd SS |
2771 | * xhci_discover_or_reset_device(), which may be called as part of |
2772 | * mass storage driver error handling. | |
2773 | */ | |
2774 | if (!xhci_alloc_virt_device(xhci, xhci->slot_id, udev, GFP_NOIO)) { | |
3ffbba95 | 2775 | xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n"); |
2cf95c18 | 2776 | goto disable_slot; |
3ffbba95 SS |
2777 | } |
2778 | udev->slot_id = xhci->slot_id; | |
2779 | /* Is this a LS or FS device under a HS hub? */ | |
2780 | /* Hub or peripherial? */ | |
3ffbba95 | 2781 | return 1; |
2cf95c18 SS |
2782 | |
2783 | disable_slot: | |
2784 | /* Disable slot, if we can do it without mem alloc */ | |
2785 | spin_lock_irqsave(&xhci->lock, flags); | |
2786 | if (!xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) | |
2787 | xhci_ring_cmd_db(xhci); | |
2788 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2789 | return 0; | |
3ffbba95 SS |
2790 | } |
2791 | ||
2792 | /* | |
2793 | * Issue an Address Device command (which will issue a SetAddress request to | |
2794 | * the device). | |
2795 | * We should be protected by the usb_address0_mutex in khubd's hub_port_init, so | |
2796 | * we should only issue and wait on one address command at the same time. | |
2797 | * | |
2798 | * We add one to the device address issued by the hardware because the USB core | |
2799 | * uses address 1 for the root hubs (even though they're not really devices). | |
2800 | */ | |
2801 | int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) | |
2802 | { | |
2803 | unsigned long flags; | |
2804 | int timeleft; | |
2805 | struct xhci_virt_device *virt_dev; | |
2806 | int ret = 0; | |
2807 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
d115b048 JY |
2808 | struct xhci_slot_ctx *slot_ctx; |
2809 | struct xhci_input_control_ctx *ctrl_ctx; | |
8e595a5d | 2810 | u64 temp_64; |
3ffbba95 SS |
2811 | |
2812 | if (!udev->slot_id) { | |
2813 | xhci_dbg(xhci, "Bad Slot ID %d\n", udev->slot_id); | |
2814 | return -EINVAL; | |
2815 | } | |
2816 | ||
3ffbba95 SS |
2817 | virt_dev = xhci->devs[udev->slot_id]; |
2818 | ||
7ed603ec ME |
2819 | if (WARN_ON(!virt_dev)) { |
2820 | /* | |
2821 | * In plug/unplug torture test with an NEC controller, | |
2822 | * a zero-dereference was observed once due to virt_dev = 0. | |
2823 | * Print useful debug rather than crash if it is observed again! | |
2824 | */ | |
2825 | xhci_warn(xhci, "Virt dev invalid for slot_id 0x%x!\n", | |
2826 | udev->slot_id); | |
2827 | return -EINVAL; | |
2828 | } | |
2829 | ||
f0615c45 AX |
2830 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
2831 | /* | |
2832 | * If this is the first Set Address since device plug-in or | |
2833 | * virt_device realloaction after a resume with an xHCI power loss, | |
2834 | * then set up the slot context. | |
2835 | */ | |
2836 | if (!slot_ctx->dev_info) | |
3ffbba95 | 2837 | xhci_setup_addressable_virt_dev(xhci, udev); |
f0615c45 | 2838 | /* Otherwise, update the control endpoint ring enqueue pointer. */ |
2d1ee590 SS |
2839 | else |
2840 | xhci_copy_ep0_dequeue_into_input_ctx(xhci, udev); | |
66e49d87 | 2841 | xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); |
d115b048 | 2842 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); |
3ffbba95 | 2843 | |
f88ba78d | 2844 | spin_lock_irqsave(&xhci->lock, flags); |
d115b048 JY |
2845 | ret = xhci_queue_address_device(xhci, virt_dev->in_ctx->dma, |
2846 | udev->slot_id); | |
3ffbba95 SS |
2847 | if (ret) { |
2848 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2849 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
2850 | return ret; | |
2851 | } | |
23e3be11 | 2852 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
2853 | spin_unlock_irqrestore(&xhci->lock, flags); |
2854 | ||
2855 | /* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */ | |
2856 | timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, | |
2857 | USB_CTRL_SET_TIMEOUT); | |
2858 | /* FIXME: From section 4.3.4: "Software shall be responsible for timing | |
2859 | * the SetAddress() "recovery interval" required by USB and aborting the | |
2860 | * command on a timeout. | |
2861 | */ | |
2862 | if (timeleft <= 0) { | |
2863 | xhci_warn(xhci, "%s while waiting for a slot\n", | |
2864 | timeleft == 0 ? "Timeout" : "Signal"); | |
2865 | /* FIXME cancel the address device command */ | |
2866 | return -ETIME; | |
2867 | } | |
2868 | ||
3ffbba95 SS |
2869 | switch (virt_dev->cmd_status) { |
2870 | case COMP_CTX_STATE: | |
2871 | case COMP_EBADSLT: | |
2872 | xhci_err(xhci, "Setup ERROR: address device command for slot %d.\n", | |
2873 | udev->slot_id); | |
2874 | ret = -EINVAL; | |
2875 | break; | |
2876 | case COMP_TX_ERR: | |
2877 | dev_warn(&udev->dev, "Device not responding to set address.\n"); | |
2878 | ret = -EPROTO; | |
2879 | break; | |
f6ba6fe2 AH |
2880 | case COMP_DEV_ERR: |
2881 | dev_warn(&udev->dev, "ERROR: Incompatible device for address " | |
2882 | "device command.\n"); | |
2883 | ret = -ENODEV; | |
2884 | break; | |
3ffbba95 SS |
2885 | case COMP_SUCCESS: |
2886 | xhci_dbg(xhci, "Successful Address Device command\n"); | |
2887 | break; | |
2888 | default: | |
2889 | xhci_err(xhci, "ERROR: unexpected command completion " | |
2890 | "code 0x%x.\n", virt_dev->cmd_status); | |
66e49d87 | 2891 | xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); |
d115b048 | 2892 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); |
3ffbba95 SS |
2893 | ret = -EINVAL; |
2894 | break; | |
2895 | } | |
2896 | if (ret) { | |
3ffbba95 SS |
2897 | return ret; |
2898 | } | |
8e595a5d SS |
2899 | temp_64 = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); |
2900 | xhci_dbg(xhci, "Op regs DCBAA ptr = %#016llx\n", temp_64); | |
2901 | xhci_dbg(xhci, "Slot ID %d dcbaa entry @%p = %#016llx\n", | |
28ccd296 ME |
2902 | udev->slot_id, |
2903 | &xhci->dcbaa->dev_context_ptrs[udev->slot_id], | |
2904 | (unsigned long long) | |
2905 | le64_to_cpu(xhci->dcbaa->dev_context_ptrs[udev->slot_id])); | |
700e2052 | 2906 | xhci_dbg(xhci, "Output Context DMA address = %#08llx\n", |
d115b048 | 2907 | (unsigned long long)virt_dev->out_ctx->dma); |
3ffbba95 | 2908 | xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); |
d115b048 | 2909 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); |
3ffbba95 | 2910 | xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); |
d115b048 | 2911 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); |
3ffbba95 SS |
2912 | /* |
2913 | * USB core uses address 1 for the roothubs, so we add one to the | |
2914 | * address given back to us by the HC. | |
2915 | */ | |
d115b048 | 2916 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); |
c8d4af8e AX |
2917 | /* Use kernel assigned address for devices; store xHC assigned |
2918 | * address locally. */ | |
28ccd296 ME |
2919 | virt_dev->address = (le32_to_cpu(slot_ctx->dev_state) & DEV_ADDR_MASK) |
2920 | + 1; | |
f94e0186 | 2921 | /* Zero the input context control for later use */ |
d115b048 JY |
2922 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
2923 | ctrl_ctx->add_flags = 0; | |
2924 | ctrl_ctx->drop_flags = 0; | |
3ffbba95 | 2925 | |
c8d4af8e | 2926 | xhci_dbg(xhci, "Internal device address = %d\n", virt_dev->address); |
3ffbba95 SS |
2927 | |
2928 | return 0; | |
2929 | } | |
2930 | ||
ac1c1b7f SS |
2931 | /* Once a hub descriptor is fetched for a device, we need to update the xHC's |
2932 | * internal data structures for the device. | |
2933 | */ | |
2934 | int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev, | |
2935 | struct usb_tt *tt, gfp_t mem_flags) | |
2936 | { | |
2937 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
2938 | struct xhci_virt_device *vdev; | |
2939 | struct xhci_command *config_cmd; | |
2940 | struct xhci_input_control_ctx *ctrl_ctx; | |
2941 | struct xhci_slot_ctx *slot_ctx; | |
2942 | unsigned long flags; | |
2943 | unsigned think_time; | |
2944 | int ret; | |
2945 | ||
2946 | /* Ignore root hubs */ | |
2947 | if (!hdev->parent) | |
2948 | return 0; | |
2949 | ||
2950 | vdev = xhci->devs[hdev->slot_id]; | |
2951 | if (!vdev) { | |
2952 | xhci_warn(xhci, "Cannot update hub desc for unknown device.\n"); | |
2953 | return -EINVAL; | |
2954 | } | |
a1d78c16 | 2955 | config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); |
ac1c1b7f SS |
2956 | if (!config_cmd) { |
2957 | xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); | |
2958 | return -ENOMEM; | |
2959 | } | |
2960 | ||
2961 | spin_lock_irqsave(&xhci->lock, flags); | |
2962 | xhci_slot_copy(xhci, config_cmd->in_ctx, vdev->out_ctx); | |
2963 | ctrl_ctx = xhci_get_input_control_ctx(xhci, config_cmd->in_ctx); | |
28ccd296 | 2964 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
ac1c1b7f | 2965 | slot_ctx = xhci_get_slot_ctx(xhci, config_cmd->in_ctx); |
28ccd296 | 2966 | slot_ctx->dev_info |= cpu_to_le32(DEV_HUB); |
ac1c1b7f | 2967 | if (tt->multi) |
28ccd296 | 2968 | slot_ctx->dev_info |= cpu_to_le32(DEV_MTT); |
ac1c1b7f SS |
2969 | if (xhci->hci_version > 0x95) { |
2970 | xhci_dbg(xhci, "xHCI version %x needs hub " | |
2971 | "TT think time and number of ports\n", | |
2972 | (unsigned int) xhci->hci_version); | |
28ccd296 | 2973 | slot_ctx->dev_info2 |= cpu_to_le32(XHCI_MAX_PORTS(hdev->maxchild)); |
ac1c1b7f SS |
2974 | /* Set TT think time - convert from ns to FS bit times. |
2975 | * 0 = 8 FS bit times, 1 = 16 FS bit times, | |
2976 | * 2 = 24 FS bit times, 3 = 32 FS bit times. | |
700b4173 AX |
2977 | * |
2978 | * xHCI 1.0: this field shall be 0 if the device is not a | |
2979 | * High-spped hub. | |
ac1c1b7f SS |
2980 | */ |
2981 | think_time = tt->think_time; | |
2982 | if (think_time != 0) | |
2983 | think_time = (think_time / 666) - 1; | |
700b4173 AX |
2984 | if (xhci->hci_version < 0x100 || hdev->speed == USB_SPEED_HIGH) |
2985 | slot_ctx->tt_info |= | |
2986 | cpu_to_le32(TT_THINK_TIME(think_time)); | |
ac1c1b7f SS |
2987 | } else { |
2988 | xhci_dbg(xhci, "xHCI version %x doesn't need hub " | |
2989 | "TT think time or number of ports\n", | |
2990 | (unsigned int) xhci->hci_version); | |
2991 | } | |
2992 | slot_ctx->dev_state = 0; | |
2993 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2994 | ||
2995 | xhci_dbg(xhci, "Set up %s for hub device.\n", | |
2996 | (xhci->hci_version > 0x95) ? | |
2997 | "configure endpoint" : "evaluate context"); | |
2998 | xhci_dbg(xhci, "Slot %u Input Context:\n", hdev->slot_id); | |
2999 | xhci_dbg_ctx(xhci, config_cmd->in_ctx, 0); | |
3000 | ||
3001 | /* Issue and wait for the configure endpoint or | |
3002 | * evaluate context command. | |
3003 | */ | |
3004 | if (xhci->hci_version > 0x95) | |
3005 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, | |
3006 | false, false); | |
3007 | else | |
3008 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, | |
3009 | true, false); | |
3010 | ||
3011 | xhci_dbg(xhci, "Slot %u Output Context:\n", hdev->slot_id); | |
3012 | xhci_dbg_ctx(xhci, vdev->out_ctx, 0); | |
3013 | ||
3014 | xhci_free_command(xhci, config_cmd); | |
3015 | return ret; | |
3016 | } | |
3017 | ||
66d4eadd SS |
3018 | int xhci_get_frame(struct usb_hcd *hcd) |
3019 | { | |
3020 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
3021 | /* EHCI mods by the periodic size. Why? */ | |
3022 | return xhci_readl(xhci, &xhci->run_regs->microframe_index) >> 3; | |
3023 | } | |
3024 | ||
3025 | MODULE_DESCRIPTION(DRIVER_DESC); | |
3026 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
3027 | MODULE_LICENSE("GPL"); | |
3028 | ||
3029 | static int __init xhci_hcd_init(void) | |
3030 | { | |
3031 | #ifdef CONFIG_PCI | |
3032 | int retval = 0; | |
3033 | ||
3034 | retval = xhci_register_pci(); | |
3035 | ||
3036 | if (retval < 0) { | |
3037 | printk(KERN_DEBUG "Problem registering PCI driver."); | |
3038 | return retval; | |
3039 | } | |
3040 | #endif | |
98441973 SS |
3041 | /* |
3042 | * Check the compiler generated sizes of structures that must be laid | |
3043 | * out in specific ways for hardware access. | |
3044 | */ | |
3045 | BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8); | |
3046 | BUILD_BUG_ON(sizeof(struct xhci_slot_ctx) != 8*32/8); | |
3047 | BUILD_BUG_ON(sizeof(struct xhci_ep_ctx) != 8*32/8); | |
3048 | /* xhci_device_control has eight fields, and also | |
3049 | * embeds one xhci_slot_ctx and 31 xhci_ep_ctx | |
3050 | */ | |
98441973 SS |
3051 | BUILD_BUG_ON(sizeof(struct xhci_stream_ctx) != 4*32/8); |
3052 | BUILD_BUG_ON(sizeof(union xhci_trb) != 4*32/8); | |
3053 | BUILD_BUG_ON(sizeof(struct xhci_erst_entry) != 4*32/8); | |
3054 | BUILD_BUG_ON(sizeof(struct xhci_cap_regs) != 7*32/8); | |
3055 | BUILD_BUG_ON(sizeof(struct xhci_intr_reg) != 8*32/8); | |
3056 | /* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */ | |
3057 | BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8); | |
3058 | BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8); | |
66d4eadd SS |
3059 | return 0; |
3060 | } | |
3061 | module_init(xhci_hcd_init); | |
3062 | ||
3063 | static void __exit xhci_hcd_cleanup(void) | |
3064 | { | |
3065 | #ifdef CONFIG_PCI | |
3066 | xhci_unregister_pci(); | |
3067 | #endif | |
3068 | } | |
3069 | module_exit(xhci_hcd_cleanup); |