Commit | Line | Data |
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66d4eadd SS |
1 | /* |
2 | * xHCI host controller driver | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp. | |
5 | * | |
6 | * Author: Sarah Sharp | |
7 | * Some code borrowed from the Linux EHCI driver. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | * for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software Foundation, | |
20 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
43b86af8 | 23 | #include <linux/pci.h> |
66d4eadd | 24 | #include <linux/irq.h> |
8df75f42 | 25 | #include <linux/log2.h> |
66d4eadd | 26 | #include <linux/module.h> |
b0567b3f | 27 | #include <linux/moduleparam.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
66d4eadd SS |
29 | |
30 | #include "xhci.h" | |
31 | ||
32 | #define DRIVER_AUTHOR "Sarah Sharp" | |
33 | #define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver" | |
34 | ||
b0567b3f SS |
35 | /* Some 0.95 hardware can't handle the chain bit on a Link TRB being cleared */ |
36 | static int link_quirk; | |
37 | module_param(link_quirk, int, S_IRUGO | S_IWUSR); | |
38 | MODULE_PARM_DESC(link_quirk, "Don't clear the chain bit on a link TRB"); | |
39 | ||
66d4eadd SS |
40 | /* TODO: copied from ehci-hcd.c - can this be refactored? */ |
41 | /* | |
42 | * handshake - spin reading hc until handshake completes or fails | |
43 | * @ptr: address of hc register to be read | |
44 | * @mask: bits to look at in result of read | |
45 | * @done: value of those bits when handshake succeeds | |
46 | * @usec: timeout in microseconds | |
47 | * | |
48 | * Returns negative errno, or zero on success | |
49 | * | |
50 | * Success happens when the "mask" bits have the specified value (hardware | |
51 | * handshake done). There are two failure modes: "usec" have passed (major | |
52 | * hardware flakeout), or the register reads as all-ones (hardware removed). | |
53 | */ | |
54 | static int handshake(struct xhci_hcd *xhci, void __iomem *ptr, | |
55 | u32 mask, u32 done, int usec) | |
56 | { | |
57 | u32 result; | |
58 | ||
59 | do { | |
60 | result = xhci_readl(xhci, ptr); | |
61 | if (result == ~(u32)0) /* card removed */ | |
62 | return -ENODEV; | |
63 | result &= mask; | |
64 | if (result == done) | |
65 | return 0; | |
66 | udelay(1); | |
67 | usec--; | |
68 | } while (usec > 0); | |
69 | return -ETIMEDOUT; | |
70 | } | |
71 | ||
72 | /* | |
4f0f0bae | 73 | * Disable interrupts and begin the xHCI halting process. |
66d4eadd | 74 | */ |
4f0f0bae | 75 | void xhci_quiesce(struct xhci_hcd *xhci) |
66d4eadd SS |
76 | { |
77 | u32 halted; | |
78 | u32 cmd; | |
79 | u32 mask; | |
80 | ||
66d4eadd SS |
81 | mask = ~(XHCI_IRQS); |
82 | halted = xhci_readl(xhci, &xhci->op_regs->status) & STS_HALT; | |
83 | if (!halted) | |
84 | mask &= ~CMD_RUN; | |
85 | ||
86 | cmd = xhci_readl(xhci, &xhci->op_regs->command); | |
87 | cmd &= mask; | |
88 | xhci_writel(xhci, cmd, &xhci->op_regs->command); | |
4f0f0bae SS |
89 | } |
90 | ||
91 | /* | |
92 | * Force HC into halt state. | |
93 | * | |
94 | * Disable any IRQs and clear the run/stop bit. | |
95 | * HC will complete any current and actively pipelined transactions, and | |
96 | * should halt within 16 microframes of the run/stop bit being cleared. | |
97 | * Read HC Halted bit in the status register to see when the HC is finished. | |
98 | * XXX: shouldn't we set HC_STATE_HALT here somewhere? | |
99 | */ | |
100 | int xhci_halt(struct xhci_hcd *xhci) | |
101 | { | |
102 | xhci_dbg(xhci, "// Halt the HC\n"); | |
103 | xhci_quiesce(xhci); | |
66d4eadd SS |
104 | |
105 | return handshake(xhci, &xhci->op_regs->status, | |
106 | STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC); | |
107 | } | |
108 | ||
ed07453f SS |
109 | /* |
110 | * Set the run bit and wait for the host to be running. | |
111 | */ | |
112 | int xhci_start(struct xhci_hcd *xhci) | |
113 | { | |
114 | u32 temp; | |
115 | int ret; | |
116 | ||
117 | temp = xhci_readl(xhci, &xhci->op_regs->command); | |
118 | temp |= (CMD_RUN); | |
119 | xhci_dbg(xhci, "// Turn on HC, cmd = 0x%x.\n", | |
120 | temp); | |
121 | xhci_writel(xhci, temp, &xhci->op_regs->command); | |
122 | ||
123 | /* | |
124 | * Wait for the HCHalted Status bit to be 0 to indicate the host is | |
125 | * running. | |
126 | */ | |
127 | ret = handshake(xhci, &xhci->op_regs->status, | |
128 | STS_HALT, 0, XHCI_MAX_HALT_USEC); | |
129 | if (ret == -ETIMEDOUT) | |
130 | xhci_err(xhci, "Host took too long to start, " | |
131 | "waited %u microseconds.\n", | |
132 | XHCI_MAX_HALT_USEC); | |
133 | return ret; | |
134 | } | |
135 | ||
66d4eadd SS |
136 | /* |
137 | * Reset a halted HC, and set the internal HC state to HC_STATE_HALT. | |
138 | * | |
139 | * This resets pipelines, timers, counters, state machines, etc. | |
140 | * Transactions will be terminated immediately, and operational registers | |
141 | * will be set to their defaults. | |
142 | */ | |
143 | int xhci_reset(struct xhci_hcd *xhci) | |
144 | { | |
145 | u32 command; | |
146 | u32 state; | |
2d62f3ee | 147 | int ret; |
66d4eadd SS |
148 | |
149 | state = xhci_readl(xhci, &xhci->op_regs->status); | |
d3512f63 SS |
150 | if ((state & STS_HALT) == 0) { |
151 | xhci_warn(xhci, "Host controller not halted, aborting reset.\n"); | |
152 | return 0; | |
153 | } | |
66d4eadd SS |
154 | |
155 | xhci_dbg(xhci, "// Reset the HC\n"); | |
156 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
157 | command |= CMD_RESET; | |
158 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
159 | /* XXX: Why does EHCI set this here? Shouldn't other code do this? */ | |
160 | xhci_to_hcd(xhci)->state = HC_STATE_HALT; | |
161 | ||
2d62f3ee SS |
162 | ret = handshake(xhci, &xhci->op_regs->command, |
163 | CMD_RESET, 0, 250 * 1000); | |
164 | if (ret) | |
165 | return ret; | |
166 | ||
167 | xhci_dbg(xhci, "Wait for controller to be ready for doorbell rings\n"); | |
168 | /* | |
169 | * xHCI cannot write to any doorbells or operational registers other | |
170 | * than status until the "Controller Not Ready" flag is cleared. | |
171 | */ | |
172 | return handshake(xhci, &xhci->op_regs->status, STS_CNR, 0, 250 * 1000); | |
66d4eadd SS |
173 | } |
174 | ||
43b86af8 DN |
175 | /* |
176 | * Free IRQs | |
177 | * free all IRQs request | |
178 | */ | |
179 | static void xhci_free_irq(struct xhci_hcd *xhci) | |
180 | { | |
181 | int i; | |
182 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); | |
183 | ||
184 | /* return if using legacy interrupt */ | |
185 | if (xhci_to_hcd(xhci)->irq >= 0) | |
186 | return; | |
187 | ||
188 | if (xhci->msix_entries) { | |
189 | for (i = 0; i < xhci->msix_count; i++) | |
190 | if (xhci->msix_entries[i].vector) | |
191 | free_irq(xhci->msix_entries[i].vector, | |
192 | xhci_to_hcd(xhci)); | |
193 | } else if (pdev->irq >= 0) | |
194 | free_irq(pdev->irq, xhci_to_hcd(xhci)); | |
195 | ||
196 | return; | |
197 | } | |
198 | ||
199 | /* | |
200 | * Set up MSI | |
201 | */ | |
202 | static int xhci_setup_msi(struct xhci_hcd *xhci) | |
66d4eadd SS |
203 | { |
204 | int ret; | |
43b86af8 DN |
205 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
206 | ||
207 | ret = pci_enable_msi(pdev); | |
208 | if (ret) { | |
209 | xhci_err(xhci, "failed to allocate MSI entry\n"); | |
210 | return ret; | |
211 | } | |
212 | ||
213 | ret = request_irq(pdev->irq, (irq_handler_t)xhci_msi_irq, | |
214 | 0, "xhci_hcd", xhci_to_hcd(xhci)); | |
215 | if (ret) { | |
216 | xhci_err(xhci, "disable MSI interrupt\n"); | |
217 | pci_disable_msi(pdev); | |
218 | } | |
219 | ||
220 | return ret; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Set up MSI-X | |
225 | */ | |
226 | static int xhci_setup_msix(struct xhci_hcd *xhci) | |
227 | { | |
228 | int i, ret = 0; | |
0029227f AX |
229 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
230 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
66d4eadd | 231 | |
43b86af8 DN |
232 | /* |
233 | * calculate number of msi-x vectors supported. | |
234 | * - HCS_MAX_INTRS: the max number of interrupts the host can handle, | |
235 | * with max number of interrupters based on the xhci HCSPARAMS1. | |
236 | * - num_online_cpus: maximum msi-x vectors per CPUs core. | |
237 | * Add additional 1 vector to ensure always available interrupt. | |
238 | */ | |
239 | xhci->msix_count = min(num_online_cpus() + 1, | |
240 | HCS_MAX_INTRS(xhci->hcs_params1)); | |
241 | ||
242 | xhci->msix_entries = | |
243 | kmalloc((sizeof(struct msix_entry))*xhci->msix_count, | |
86871975 | 244 | GFP_KERNEL); |
66d4eadd SS |
245 | if (!xhci->msix_entries) { |
246 | xhci_err(xhci, "Failed to allocate MSI-X entries\n"); | |
247 | return -ENOMEM; | |
248 | } | |
43b86af8 DN |
249 | |
250 | for (i = 0; i < xhci->msix_count; i++) { | |
251 | xhci->msix_entries[i].entry = i; | |
252 | xhci->msix_entries[i].vector = 0; | |
253 | } | |
66d4eadd SS |
254 | |
255 | ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count); | |
256 | if (ret) { | |
257 | xhci_err(xhci, "Failed to enable MSI-X\n"); | |
258 | goto free_entries; | |
259 | } | |
260 | ||
43b86af8 DN |
261 | for (i = 0; i < xhci->msix_count; i++) { |
262 | ret = request_irq(xhci->msix_entries[i].vector, | |
263 | (irq_handler_t)xhci_msi_irq, | |
264 | 0, "xhci_hcd", xhci_to_hcd(xhci)); | |
265 | if (ret) | |
266 | goto disable_msix; | |
66d4eadd | 267 | } |
43b86af8 | 268 | |
0029227f | 269 | hcd->msix_enabled = 1; |
43b86af8 | 270 | return ret; |
66d4eadd SS |
271 | |
272 | disable_msix: | |
43b86af8 DN |
273 | xhci_err(xhci, "disable MSI-X interrupt\n"); |
274 | xhci_free_irq(xhci); | |
66d4eadd SS |
275 | pci_disable_msix(pdev); |
276 | free_entries: | |
277 | kfree(xhci->msix_entries); | |
278 | xhci->msix_entries = NULL; | |
279 | return ret; | |
280 | } | |
281 | ||
66d4eadd SS |
282 | /* Free any IRQs and disable MSI-X */ |
283 | static void xhci_cleanup_msix(struct xhci_hcd *xhci) | |
284 | { | |
0029227f AX |
285 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
286 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
66d4eadd | 287 | |
43b86af8 DN |
288 | xhci_free_irq(xhci); |
289 | ||
290 | if (xhci->msix_entries) { | |
291 | pci_disable_msix(pdev); | |
292 | kfree(xhci->msix_entries); | |
293 | xhci->msix_entries = NULL; | |
294 | } else { | |
295 | pci_disable_msi(pdev); | |
296 | } | |
297 | ||
0029227f | 298 | hcd->msix_enabled = 0; |
43b86af8 | 299 | return; |
66d4eadd | 300 | } |
66d4eadd SS |
301 | |
302 | /* | |
303 | * Initialize memory for HCD and xHC (one-time init). | |
304 | * | |
305 | * Program the PAGESIZE register, initialize the device context array, create | |
306 | * device contexts (?), set up a command ring segment (or two?), create event | |
307 | * ring (one for now). | |
308 | */ | |
309 | int xhci_init(struct usb_hcd *hcd) | |
310 | { | |
311 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
312 | int retval = 0; | |
313 | ||
314 | xhci_dbg(xhci, "xhci_init\n"); | |
315 | spin_lock_init(&xhci->lock); | |
b0567b3f SS |
316 | if (link_quirk) { |
317 | xhci_dbg(xhci, "QUIRK: Not clearing Link TRB chain bits.\n"); | |
318 | xhci->quirks |= XHCI_LINK_TRB_QUIRK; | |
319 | } else { | |
ac9d8fe7 | 320 | xhci_dbg(xhci, "xHCI doesn't need link TRB QUIRK\n"); |
b0567b3f | 321 | } |
66d4eadd SS |
322 | retval = xhci_mem_init(xhci, GFP_KERNEL); |
323 | xhci_dbg(xhci, "Finished xhci_init\n"); | |
324 | ||
325 | return retval; | |
326 | } | |
327 | ||
7f84eef0 SS |
328 | /*-------------------------------------------------------------------------*/ |
329 | ||
7f84eef0 SS |
330 | |
331 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING | |
23e3be11 | 332 | void xhci_event_ring_work(unsigned long arg) |
7f84eef0 SS |
333 | { |
334 | unsigned long flags; | |
335 | int temp; | |
8e595a5d | 336 | u64 temp_64; |
7f84eef0 SS |
337 | struct xhci_hcd *xhci = (struct xhci_hcd *) arg; |
338 | int i, j; | |
339 | ||
340 | xhci_dbg(xhci, "Poll event ring: %lu\n", jiffies); | |
341 | ||
342 | spin_lock_irqsave(&xhci->lock, flags); | |
343 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
344 | xhci_dbg(xhci, "op reg status = 0x%x\n", temp); | |
6f5165cf | 345 | if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) { |
e4ab05df SS |
346 | xhci_dbg(xhci, "HW died, polling stopped.\n"); |
347 | spin_unlock_irqrestore(&xhci->lock, flags); | |
348 | return; | |
349 | } | |
350 | ||
7f84eef0 SS |
351 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); |
352 | xhci_dbg(xhci, "ir_set 0 pending = 0x%x\n", temp); | |
7f84eef0 SS |
353 | xhci_dbg(xhci, "HC error bitmask = 0x%x\n", xhci->error_bitmask); |
354 | xhci->error_bitmask = 0; | |
355 | xhci_dbg(xhci, "Event ring:\n"); | |
356 | xhci_debug_segment(xhci, xhci->event_ring->deq_seg); | |
357 | xhci_dbg_ring_ptrs(xhci, xhci->event_ring); | |
8e595a5d SS |
358 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
359 | temp_64 &= ~ERST_PTR_MASK; | |
360 | xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); | |
7f84eef0 SS |
361 | xhci_dbg(xhci, "Command ring:\n"); |
362 | xhci_debug_segment(xhci, xhci->cmd_ring->deq_seg); | |
363 | xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); | |
364 | xhci_dbg_cmd_ptrs(xhci); | |
3ffbba95 | 365 | for (i = 0; i < MAX_HC_SLOTS; ++i) { |
63a0d9ab SS |
366 | if (!xhci->devs[i]) |
367 | continue; | |
368 | for (j = 0; j < 31; ++j) { | |
e9df17eb | 369 | xhci_dbg_ep_rings(xhci, i, j, &xhci->devs[i]->eps[j]); |
3ffbba95 SS |
370 | } |
371 | } | |
7f84eef0 SS |
372 | spin_unlock_irqrestore(&xhci->lock, flags); |
373 | ||
374 | if (!xhci->zombie) | |
375 | mod_timer(&xhci->event_ring_timer, jiffies + POLL_TIMEOUT * HZ); | |
376 | else | |
377 | xhci_dbg(xhci, "Quit polling the event ring.\n"); | |
378 | } | |
379 | #endif | |
380 | ||
66d4eadd SS |
381 | /* |
382 | * Start the HC after it was halted. | |
383 | * | |
384 | * This function is called by the USB core when the HC driver is added. | |
385 | * Its opposite is xhci_stop(). | |
386 | * | |
387 | * xhci_init() must be called once before this function can be called. | |
388 | * Reset the HC, enable device slot contexts, program DCBAAP, and | |
389 | * set command ring pointer and event ring pointer. | |
390 | * | |
391 | * Setup MSI-X vectors and enable interrupts. | |
392 | */ | |
393 | int xhci_run(struct usb_hcd *hcd) | |
394 | { | |
395 | u32 temp; | |
8e595a5d | 396 | u64 temp_64; |
43b86af8 | 397 | u32 ret; |
66d4eadd | 398 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
43b86af8 | 399 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
66d4eadd | 400 | |
0f2a7930 | 401 | hcd->uses_new_polling = 1; |
0f2a7930 | 402 | |
7f84eef0 | 403 | xhci_dbg(xhci, "xhci_run\n"); |
43b86af8 DN |
404 | /* unregister the legacy interrupt */ |
405 | if (hcd->irq) | |
406 | free_irq(hcd->irq, hcd); | |
407 | hcd->irq = -1; | |
408 | ||
66d4eadd | 409 | ret = xhci_setup_msix(xhci); |
43b86af8 DN |
410 | if (ret) |
411 | /* fall back to msi*/ | |
412 | ret = xhci_setup_msi(xhci); | |
413 | ||
414 | if (ret) { | |
415 | /* fall back to legacy interrupt*/ | |
416 | ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED, | |
417 | hcd->irq_descr, hcd); | |
418 | if (ret) { | |
419 | xhci_err(xhci, "request interrupt %d failed\n", | |
420 | pdev->irq); | |
421 | return ret; | |
422 | } | |
423 | hcd->irq = pdev->irq; | |
424 | } | |
66d4eadd | 425 | |
7f84eef0 SS |
426 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
427 | init_timer(&xhci->event_ring_timer); | |
428 | xhci->event_ring_timer.data = (unsigned long) xhci; | |
23e3be11 | 429 | xhci->event_ring_timer.function = xhci_event_ring_work; |
7f84eef0 SS |
430 | /* Poll the event ring */ |
431 | xhci->event_ring_timer.expires = jiffies + POLL_TIMEOUT * HZ; | |
432 | xhci->zombie = 0; | |
433 | xhci_dbg(xhci, "Setting event ring polling timer\n"); | |
434 | add_timer(&xhci->event_ring_timer); | |
435 | #endif | |
436 | ||
66e49d87 SS |
437 | xhci_dbg(xhci, "Command ring memory map follows:\n"); |
438 | xhci_debug_ring(xhci, xhci->cmd_ring); | |
439 | xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); | |
440 | xhci_dbg_cmd_ptrs(xhci); | |
441 | ||
442 | xhci_dbg(xhci, "ERST memory map follows:\n"); | |
443 | xhci_dbg_erst(xhci, &xhci->erst); | |
444 | xhci_dbg(xhci, "Event ring:\n"); | |
445 | xhci_debug_ring(xhci, xhci->event_ring); | |
446 | xhci_dbg_ring_ptrs(xhci, xhci->event_ring); | |
447 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); | |
448 | temp_64 &= ~ERST_PTR_MASK; | |
449 | xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); | |
450 | ||
66d4eadd SS |
451 | xhci_dbg(xhci, "// Set the interrupt modulation register\n"); |
452 | temp = xhci_readl(xhci, &xhci->ir_set->irq_control); | |
a4d88302 | 453 | temp &= ~ER_IRQ_INTERVAL_MASK; |
66d4eadd SS |
454 | temp |= (u32) 160; |
455 | xhci_writel(xhci, temp, &xhci->ir_set->irq_control); | |
456 | ||
457 | /* Set the HCD state before we enable the irqs */ | |
458 | hcd->state = HC_STATE_RUNNING; | |
459 | temp = xhci_readl(xhci, &xhci->op_regs->command); | |
460 | temp |= (CMD_EIE); | |
461 | xhci_dbg(xhci, "// Enable interrupts, cmd = 0x%x.\n", | |
462 | temp); | |
463 | xhci_writel(xhci, temp, &xhci->op_regs->command); | |
464 | ||
465 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
700e2052 GKH |
466 | xhci_dbg(xhci, "// Enabling event ring interrupter %p by writing 0x%x to irq_pending\n", |
467 | xhci->ir_set, (unsigned int) ER_IRQ_ENABLE(temp)); | |
66d4eadd SS |
468 | xhci_writel(xhci, ER_IRQ_ENABLE(temp), |
469 | &xhci->ir_set->irq_pending); | |
470 | xhci_print_ir_set(xhci, xhci->ir_set, 0); | |
471 | ||
0238634d SS |
472 | if (xhci->quirks & XHCI_NEC_HOST) |
473 | xhci_queue_vendor_command(xhci, 0, 0, 0, | |
474 | TRB_TYPE(TRB_NEC_GET_FW)); | |
7f84eef0 | 475 | |
ed07453f SS |
476 | if (xhci_start(xhci)) { |
477 | xhci_halt(xhci); | |
478 | return -ENODEV; | |
479 | } | |
480 | ||
0238634d SS |
481 | if (xhci->quirks & XHCI_NEC_HOST) |
482 | xhci_ring_cmd_db(xhci); | |
66d4eadd SS |
483 | |
484 | xhci_dbg(xhci, "Finished xhci_run\n"); | |
485 | return 0; | |
486 | } | |
487 | ||
488 | /* | |
489 | * Stop xHCI driver. | |
490 | * | |
491 | * This function is called by the USB core when the HC driver is removed. | |
492 | * Its opposite is xhci_run(). | |
493 | * | |
494 | * Disable device contexts, disable IRQs, and quiesce the HC. | |
495 | * Reset the HC, finish any completed transactions, and cleanup memory. | |
496 | */ | |
497 | void xhci_stop(struct usb_hcd *hcd) | |
498 | { | |
499 | u32 temp; | |
500 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
501 | ||
502 | spin_lock_irq(&xhci->lock); | |
66d4eadd SS |
503 | xhci_halt(xhci); |
504 | xhci_reset(xhci); | |
505 | spin_unlock_irq(&xhci->lock); | |
506 | ||
40a9fb17 ZR |
507 | xhci_cleanup_msix(xhci); |
508 | ||
7f84eef0 SS |
509 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
510 | /* Tell the event ring poll function not to reschedule */ | |
511 | xhci->zombie = 1; | |
512 | del_timer_sync(&xhci->event_ring_timer); | |
513 | #endif | |
514 | ||
66d4eadd SS |
515 | xhci_dbg(xhci, "// Disabling event ring interrupts\n"); |
516 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
517 | xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status); | |
518 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
519 | xhci_writel(xhci, ER_IRQ_DISABLE(temp), | |
520 | &xhci->ir_set->irq_pending); | |
521 | xhci_print_ir_set(xhci, xhci->ir_set, 0); | |
522 | ||
523 | xhci_dbg(xhci, "cleaning up memory\n"); | |
524 | xhci_mem_cleanup(xhci); | |
525 | xhci_dbg(xhci, "xhci_stop completed - status = %x\n", | |
526 | xhci_readl(xhci, &xhci->op_regs->status)); | |
527 | } | |
528 | ||
529 | /* | |
530 | * Shutdown HC (not bus-specific) | |
531 | * | |
532 | * This is called when the machine is rebooting or halting. We assume that the | |
533 | * machine will be powered off, and the HC's internal state will be reset. | |
534 | * Don't bother to free memory. | |
535 | */ | |
536 | void xhci_shutdown(struct usb_hcd *hcd) | |
537 | { | |
538 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
539 | ||
540 | spin_lock_irq(&xhci->lock); | |
541 | xhci_halt(xhci); | |
43b86af8 | 542 | spin_unlock_irq(&xhci->lock); |
66d4eadd | 543 | |
40a9fb17 ZR |
544 | xhci_cleanup_msix(xhci); |
545 | ||
66d4eadd SS |
546 | xhci_dbg(xhci, "xhci_shutdown completed - status = %x\n", |
547 | xhci_readl(xhci, &xhci->op_regs->status)); | |
548 | } | |
549 | ||
b5b5c3ac | 550 | #ifdef CONFIG_PM |
5535b1d5 AX |
551 | static void xhci_save_registers(struct xhci_hcd *xhci) |
552 | { | |
553 | xhci->s3.command = xhci_readl(xhci, &xhci->op_regs->command); | |
554 | xhci->s3.dev_nt = xhci_readl(xhci, &xhci->op_regs->dev_notification); | |
555 | xhci->s3.dcbaa_ptr = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); | |
556 | xhci->s3.config_reg = xhci_readl(xhci, &xhci->op_regs->config_reg); | |
557 | xhci->s3.irq_pending = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
558 | xhci->s3.irq_control = xhci_readl(xhci, &xhci->ir_set->irq_control); | |
559 | xhci->s3.erst_size = xhci_readl(xhci, &xhci->ir_set->erst_size); | |
560 | xhci->s3.erst_base = xhci_read_64(xhci, &xhci->ir_set->erst_base); | |
561 | xhci->s3.erst_dequeue = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); | |
562 | } | |
563 | ||
564 | static void xhci_restore_registers(struct xhci_hcd *xhci) | |
565 | { | |
566 | xhci_writel(xhci, xhci->s3.command, &xhci->op_regs->command); | |
567 | xhci_writel(xhci, xhci->s3.dev_nt, &xhci->op_regs->dev_notification); | |
568 | xhci_write_64(xhci, xhci->s3.dcbaa_ptr, &xhci->op_regs->dcbaa_ptr); | |
569 | xhci_writel(xhci, xhci->s3.config_reg, &xhci->op_regs->config_reg); | |
570 | xhci_writel(xhci, xhci->s3.irq_pending, &xhci->ir_set->irq_pending); | |
571 | xhci_writel(xhci, xhci->s3.irq_control, &xhci->ir_set->irq_control); | |
572 | xhci_writel(xhci, xhci->s3.erst_size, &xhci->ir_set->erst_size); | |
573 | xhci_write_64(xhci, xhci->s3.erst_base, &xhci->ir_set->erst_base); | |
574 | } | |
575 | ||
89821320 SS |
576 | static void xhci_set_cmd_ring_deq(struct xhci_hcd *xhci) |
577 | { | |
578 | u64 val_64; | |
579 | ||
580 | /* step 2: initialize command ring buffer */ | |
581 | val_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); | |
582 | val_64 = (val_64 & (u64) CMD_RING_RSVD_BITS) | | |
583 | (xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg, | |
584 | xhci->cmd_ring->dequeue) & | |
585 | (u64) ~CMD_RING_RSVD_BITS) | | |
586 | xhci->cmd_ring->cycle_state; | |
587 | xhci_dbg(xhci, "// Setting command ring address to 0x%llx\n", | |
588 | (long unsigned long) val_64); | |
589 | xhci_write_64(xhci, val_64, &xhci->op_regs->cmd_ring); | |
590 | } | |
591 | ||
592 | /* | |
593 | * The whole command ring must be cleared to zero when we suspend the host. | |
594 | * | |
595 | * The host doesn't save the command ring pointer in the suspend well, so we | |
596 | * need to re-program it on resume. Unfortunately, the pointer must be 64-byte | |
597 | * aligned, because of the reserved bits in the command ring dequeue pointer | |
598 | * register. Therefore, we can't just set the dequeue pointer back in the | |
599 | * middle of the ring (TRBs are 16-byte aligned). | |
600 | */ | |
601 | static void xhci_clear_command_ring(struct xhci_hcd *xhci) | |
602 | { | |
603 | struct xhci_ring *ring; | |
604 | struct xhci_segment *seg; | |
605 | ||
606 | ring = xhci->cmd_ring; | |
607 | seg = ring->deq_seg; | |
608 | do { | |
609 | memset(seg->trbs, 0, SEGMENT_SIZE); | |
610 | seg = seg->next; | |
611 | } while (seg != ring->deq_seg); | |
612 | ||
613 | /* Reset the software enqueue and dequeue pointers */ | |
614 | ring->deq_seg = ring->first_seg; | |
615 | ring->dequeue = ring->first_seg->trbs; | |
616 | ring->enq_seg = ring->deq_seg; | |
617 | ring->enqueue = ring->dequeue; | |
618 | ||
619 | /* | |
620 | * Ring is now zeroed, so the HW should look for change of ownership | |
621 | * when the cycle bit is set to 1. | |
622 | */ | |
623 | ring->cycle_state = 1; | |
624 | ||
625 | /* | |
626 | * Reset the hardware dequeue pointer. | |
627 | * Yes, this will need to be re-written after resume, but we're paranoid | |
628 | * and want to make sure the hardware doesn't access bogus memory | |
629 | * because, say, the BIOS or an SMI started the host without changing | |
630 | * the command ring pointers. | |
631 | */ | |
632 | xhci_set_cmd_ring_deq(xhci); | |
633 | } | |
634 | ||
5535b1d5 AX |
635 | /* |
636 | * Stop HC (not bus-specific) | |
637 | * | |
638 | * This is called when the machine transition into S3/S4 mode. | |
639 | * | |
640 | */ | |
641 | int xhci_suspend(struct xhci_hcd *xhci) | |
642 | { | |
643 | int rc = 0; | |
644 | struct usb_hcd *hcd = xhci_to_hcd(xhci); | |
645 | u32 command; | |
0029227f | 646 | int i; |
5535b1d5 AX |
647 | |
648 | spin_lock_irq(&xhci->lock); | |
649 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
650 | /* step 1: stop endpoint */ | |
651 | /* skipped assuming that port suspend has done */ | |
652 | ||
653 | /* step 2: clear Run/Stop bit */ | |
654 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
655 | command &= ~CMD_RUN; | |
656 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
657 | if (handshake(xhci, &xhci->op_regs->status, | |
658 | STS_HALT, STS_HALT, 100*100)) { | |
659 | xhci_warn(xhci, "WARN: xHC CMD_RUN timeout\n"); | |
660 | spin_unlock_irq(&xhci->lock); | |
661 | return -ETIMEDOUT; | |
662 | } | |
89821320 | 663 | xhci_clear_command_ring(xhci); |
5535b1d5 AX |
664 | |
665 | /* step 3: save registers */ | |
666 | xhci_save_registers(xhci); | |
667 | ||
668 | /* step 4: set CSS flag */ | |
669 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
670 | command |= CMD_CSS; | |
671 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
672 | if (handshake(xhci, &xhci->op_regs->status, STS_SAVE, 0, 10*100)) { | |
673 | xhci_warn(xhci, "WARN: xHC CMD_CSS timeout\n"); | |
674 | spin_unlock_irq(&xhci->lock); | |
675 | return -ETIMEDOUT; | |
676 | } | |
5535b1d5 AX |
677 | spin_unlock_irq(&xhci->lock); |
678 | ||
0029227f AX |
679 | /* step 5: remove core well power */ |
680 | /* synchronize irq when using MSI-X */ | |
681 | if (xhci->msix_entries) { | |
682 | for (i = 0; i < xhci->msix_count; i++) | |
683 | synchronize_irq(xhci->msix_entries[i].vector); | |
684 | } | |
685 | ||
5535b1d5 AX |
686 | return rc; |
687 | } | |
688 | ||
689 | /* | |
690 | * start xHC (not bus-specific) | |
691 | * | |
692 | * This is called when the machine transition from S3/S4 mode. | |
693 | * | |
694 | */ | |
695 | int xhci_resume(struct xhci_hcd *xhci, bool hibernated) | |
696 | { | |
697 | u32 command, temp = 0; | |
698 | struct usb_hcd *hcd = xhci_to_hcd(xhci); | |
019a35f1 | 699 | int retval; |
5535b1d5 | 700 | |
5535b1d5 AX |
701 | if (time_before(jiffies, xhci->next_statechange)) |
702 | msleep(100); | |
703 | ||
704 | spin_lock_irq(&xhci->lock); | |
705 | ||
706 | if (!hibernated) { | |
707 | /* step 1: restore register */ | |
708 | xhci_restore_registers(xhci); | |
709 | /* step 2: initialize command ring buffer */ | |
89821320 | 710 | xhci_set_cmd_ring_deq(xhci); |
5535b1d5 AX |
711 | /* step 3: restore state and start state*/ |
712 | /* step 3: set CRS flag */ | |
713 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
714 | command |= CMD_CRS; | |
715 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
716 | if (handshake(xhci, &xhci->op_regs->status, | |
717 | STS_RESTORE, 0, 10*100)) { | |
718 | xhci_dbg(xhci, "WARN: xHC CMD_CSS timeout\n"); | |
719 | spin_unlock_irq(&xhci->lock); | |
720 | return -ETIMEDOUT; | |
721 | } | |
722 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
723 | } | |
724 | ||
725 | /* If restore operation fails, re-initialize the HC during resume */ | |
726 | if ((temp & STS_SRE) || hibernated) { | |
727 | usb_root_hub_lost_power(hcd->self.root_hub); | |
728 | ||
729 | xhci_dbg(xhci, "Stop HCD\n"); | |
730 | xhci_halt(xhci); | |
731 | xhci_reset(xhci); | |
5535b1d5 | 732 | spin_unlock_irq(&xhci->lock); |
0029227f | 733 | xhci_cleanup_msix(xhci); |
5535b1d5 AX |
734 | |
735 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING | |
736 | /* Tell the event ring poll function not to reschedule */ | |
737 | xhci->zombie = 1; | |
738 | del_timer_sync(&xhci->event_ring_timer); | |
739 | #endif | |
740 | ||
741 | xhci_dbg(xhci, "// Disabling event ring interrupts\n"); | |
742 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
743 | xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status); | |
744 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
745 | xhci_writel(xhci, ER_IRQ_DISABLE(temp), | |
746 | &xhci->ir_set->irq_pending); | |
747 | xhci_print_ir_set(xhci, xhci->ir_set, 0); | |
748 | ||
749 | xhci_dbg(xhci, "cleaning up memory\n"); | |
750 | xhci_mem_cleanup(xhci); | |
751 | xhci_dbg(xhci, "xhci_stop completed - status = %x\n", | |
752 | xhci_readl(xhci, &xhci->op_regs->status)); | |
753 | ||
754 | xhci_dbg(xhci, "Initialize the HCD\n"); | |
755 | retval = xhci_init(hcd); | |
756 | if (retval) | |
757 | return retval; | |
758 | ||
759 | xhci_dbg(xhci, "Start the HCD\n"); | |
760 | retval = xhci_run(hcd); | |
761 | if (!retval) | |
762 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
763 | hcd->state = HC_STATE_SUSPENDED; | |
764 | return retval; | |
765 | } | |
766 | ||
5535b1d5 AX |
767 | /* step 4: set Run/Stop bit */ |
768 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
769 | command |= CMD_RUN; | |
770 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
771 | handshake(xhci, &xhci->op_regs->status, STS_HALT, | |
772 | 0, 250 * 1000); | |
773 | ||
774 | /* step 5: walk topology and initialize portsc, | |
775 | * portpmsc and portli | |
776 | */ | |
777 | /* this is done in bus_resume */ | |
778 | ||
779 | /* step 6: restart each of the previously | |
780 | * Running endpoints by ringing their doorbells | |
781 | */ | |
782 | ||
783 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
5535b1d5 AX |
784 | |
785 | spin_unlock_irq(&xhci->lock); | |
786 | return 0; | |
787 | } | |
b5b5c3ac SS |
788 | #endif /* CONFIG_PM */ |
789 | ||
7f84eef0 SS |
790 | /*-------------------------------------------------------------------------*/ |
791 | ||
d0e96f5a SS |
792 | /** |
793 | * xhci_get_endpoint_index - Used for passing endpoint bitmasks between the core and | |
794 | * HCDs. Find the index for an endpoint given its descriptor. Use the return | |
795 | * value to right shift 1 for the bitmask. | |
796 | * | |
797 | * Index = (epnum * 2) + direction - 1, | |
798 | * where direction = 0 for OUT, 1 for IN. | |
799 | * For control endpoints, the IN index is used (OUT index is unused), so | |
800 | * index = (epnum * 2) + direction - 1 = (epnum * 2) + 1 - 1 = (epnum * 2) | |
801 | */ | |
802 | unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc) | |
803 | { | |
804 | unsigned int index; | |
805 | if (usb_endpoint_xfer_control(desc)) | |
806 | index = (unsigned int) (usb_endpoint_num(desc)*2); | |
807 | else | |
808 | index = (unsigned int) (usb_endpoint_num(desc)*2) + | |
809 | (usb_endpoint_dir_in(desc) ? 1 : 0) - 1; | |
810 | return index; | |
811 | } | |
812 | ||
f94e0186 SS |
813 | /* Find the flag for this endpoint (for use in the control context). Use the |
814 | * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is | |
815 | * bit 1, etc. | |
816 | */ | |
817 | unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc) | |
818 | { | |
819 | return 1 << (xhci_get_endpoint_index(desc) + 1); | |
820 | } | |
821 | ||
ac9d8fe7 SS |
822 | /* Find the flag for this endpoint (for use in the control context). Use the |
823 | * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is | |
824 | * bit 1, etc. | |
825 | */ | |
826 | unsigned int xhci_get_endpoint_flag_from_index(unsigned int ep_index) | |
827 | { | |
828 | return 1 << (ep_index + 1); | |
829 | } | |
830 | ||
f94e0186 SS |
831 | /* Compute the last valid endpoint context index. Basically, this is the |
832 | * endpoint index plus one. For slot contexts with more than valid endpoint, | |
833 | * we find the most significant bit set in the added contexts flags. | |
834 | * e.g. ep 1 IN (with epnum 0x81) => added_ctxs = 0b1000 | |
835 | * fls(0b1000) = 4, but the endpoint context index is 3, so subtract one. | |
836 | */ | |
ac9d8fe7 | 837 | unsigned int xhci_last_valid_endpoint(u32 added_ctxs) |
f94e0186 SS |
838 | { |
839 | return fls(added_ctxs) - 1; | |
840 | } | |
841 | ||
d0e96f5a SS |
842 | /* Returns 1 if the arguments are OK; |
843 | * returns 0 this is a root hub; returns -EINVAL for NULL pointers. | |
844 | */ | |
845 | int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev, | |
64927730 AX |
846 | struct usb_host_endpoint *ep, int check_ep, bool check_virt_dev, |
847 | const char *func) { | |
848 | struct xhci_hcd *xhci; | |
849 | struct xhci_virt_device *virt_dev; | |
850 | ||
d0e96f5a SS |
851 | if (!hcd || (check_ep && !ep) || !udev) { |
852 | printk(KERN_DEBUG "xHCI %s called with invalid args\n", | |
853 | func); | |
854 | return -EINVAL; | |
855 | } | |
856 | if (!udev->parent) { | |
857 | printk(KERN_DEBUG "xHCI %s called for root hub\n", | |
858 | func); | |
859 | return 0; | |
860 | } | |
64927730 AX |
861 | |
862 | if (check_virt_dev) { | |
863 | xhci = hcd_to_xhci(hcd); | |
864 | if (!udev->slot_id || !xhci->devs | |
865 | || !xhci->devs[udev->slot_id]) { | |
866 | printk(KERN_DEBUG "xHCI %s called with unaddressed " | |
867 | "device\n", func); | |
868 | return -EINVAL; | |
869 | } | |
870 | ||
871 | virt_dev = xhci->devs[udev->slot_id]; | |
872 | if (virt_dev->udev != udev) { | |
873 | printk(KERN_DEBUG "xHCI %s called with udev and " | |
874 | "virt_dev does not match\n", func); | |
875 | return -EINVAL; | |
876 | } | |
d0e96f5a | 877 | } |
64927730 | 878 | |
d0e96f5a SS |
879 | return 1; |
880 | } | |
881 | ||
2d3f1fac | 882 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, |
913a8a34 SS |
883 | struct usb_device *udev, struct xhci_command *command, |
884 | bool ctx_change, bool must_succeed); | |
2d3f1fac SS |
885 | |
886 | /* | |
887 | * Full speed devices may have a max packet size greater than 8 bytes, but the | |
888 | * USB core doesn't know that until it reads the first 8 bytes of the | |
889 | * descriptor. If the usb_device's max packet size changes after that point, | |
890 | * we need to issue an evaluate context command and wait on it. | |
891 | */ | |
892 | static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id, | |
893 | unsigned int ep_index, struct urb *urb) | |
894 | { | |
895 | struct xhci_container_ctx *in_ctx; | |
896 | struct xhci_container_ctx *out_ctx; | |
897 | struct xhci_input_control_ctx *ctrl_ctx; | |
898 | struct xhci_ep_ctx *ep_ctx; | |
899 | int max_packet_size; | |
900 | int hw_max_packet_size; | |
901 | int ret = 0; | |
902 | ||
903 | out_ctx = xhci->devs[slot_id]->out_ctx; | |
904 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); | |
905 | hw_max_packet_size = MAX_PACKET_DECODED(ep_ctx->ep_info2); | |
906 | max_packet_size = urb->dev->ep0.desc.wMaxPacketSize; | |
907 | if (hw_max_packet_size != max_packet_size) { | |
908 | xhci_dbg(xhci, "Max Packet Size for ep 0 changed.\n"); | |
909 | xhci_dbg(xhci, "Max packet size in usb_device = %d\n", | |
910 | max_packet_size); | |
911 | xhci_dbg(xhci, "Max packet size in xHCI HW = %d\n", | |
912 | hw_max_packet_size); | |
913 | xhci_dbg(xhci, "Issuing evaluate context command.\n"); | |
914 | ||
915 | /* Set up the modified control endpoint 0 */ | |
913a8a34 SS |
916 | xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, |
917 | xhci->devs[slot_id]->out_ctx, ep_index); | |
2d3f1fac SS |
918 | in_ctx = xhci->devs[slot_id]->in_ctx; |
919 | ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); | |
920 | ep_ctx->ep_info2 &= ~MAX_PACKET_MASK; | |
921 | ep_ctx->ep_info2 |= MAX_PACKET(max_packet_size); | |
922 | ||
923 | /* Set up the input context flags for the command */ | |
924 | /* FIXME: This won't work if a non-default control endpoint | |
925 | * changes max packet sizes. | |
926 | */ | |
927 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
928 | ctrl_ctx->add_flags = EP0_FLAG; | |
929 | ctrl_ctx->drop_flags = 0; | |
930 | ||
931 | xhci_dbg(xhci, "Slot %d input context\n", slot_id); | |
932 | xhci_dbg_ctx(xhci, in_ctx, ep_index); | |
933 | xhci_dbg(xhci, "Slot %d output context\n", slot_id); | |
934 | xhci_dbg_ctx(xhci, out_ctx, ep_index); | |
935 | ||
913a8a34 SS |
936 | ret = xhci_configure_endpoint(xhci, urb->dev, NULL, |
937 | true, false); | |
2d3f1fac SS |
938 | |
939 | /* Clean up the input context for later use by bandwidth | |
940 | * functions. | |
941 | */ | |
942 | ctrl_ctx->add_flags = SLOT_FLAG; | |
943 | } | |
944 | return ret; | |
945 | } | |
946 | ||
d0e96f5a SS |
947 | /* |
948 | * non-error returns are a promise to giveback() the urb later | |
949 | * we drop ownership so next owner (or urb unlink) can get it | |
950 | */ | |
951 | int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) | |
952 | { | |
953 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
954 | unsigned long flags; | |
955 | int ret = 0; | |
956 | unsigned int slot_id, ep_index; | |
8e51adcc AX |
957 | struct urb_priv *urb_priv; |
958 | int size, i; | |
2d3f1fac | 959 | |
64927730 AX |
960 | if (!urb || xhci_check_args(hcd, urb->dev, urb->ep, |
961 | true, true, __func__) <= 0) | |
d0e96f5a SS |
962 | return -EINVAL; |
963 | ||
964 | slot_id = urb->dev->slot_id; | |
965 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); | |
d0e96f5a | 966 | |
541c7d43 | 967 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
d0e96f5a SS |
968 | if (!in_interrupt()) |
969 | xhci_dbg(xhci, "urb submitted during PCI suspend\n"); | |
970 | ret = -ESHUTDOWN; | |
971 | goto exit; | |
972 | } | |
8e51adcc AX |
973 | |
974 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) | |
975 | size = urb->number_of_packets; | |
976 | else | |
977 | size = 1; | |
978 | ||
979 | urb_priv = kzalloc(sizeof(struct urb_priv) + | |
980 | size * sizeof(struct xhci_td *), mem_flags); | |
981 | if (!urb_priv) | |
982 | return -ENOMEM; | |
983 | ||
984 | for (i = 0; i < size; i++) { | |
985 | urb_priv->td[i] = kzalloc(sizeof(struct xhci_td), mem_flags); | |
986 | if (!urb_priv->td[i]) { | |
987 | urb_priv->length = i; | |
988 | xhci_urb_free_priv(xhci, urb_priv); | |
989 | return -ENOMEM; | |
990 | } | |
991 | } | |
992 | ||
993 | urb_priv->length = size; | |
994 | urb_priv->td_cnt = 0; | |
995 | urb->hcpriv = urb_priv; | |
996 | ||
2d3f1fac SS |
997 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
998 | /* Check to see if the max packet size for the default control | |
999 | * endpoint changed during FS device enumeration | |
1000 | */ | |
1001 | if (urb->dev->speed == USB_SPEED_FULL) { | |
1002 | ret = xhci_check_maxpacket(xhci, slot_id, | |
1003 | ep_index, urb); | |
1004 | if (ret < 0) | |
1005 | return ret; | |
1006 | } | |
1007 | ||
b11069f5 SS |
1008 | /* We have a spinlock and interrupts disabled, so we must pass |
1009 | * atomic context to this function, which may allocate memory. | |
1010 | */ | |
2d3f1fac | 1011 | spin_lock_irqsave(&xhci->lock, flags); |
6f5165cf SS |
1012 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1013 | goto dying; | |
b11069f5 | 1014 | ret = xhci_queue_ctrl_tx(xhci, GFP_ATOMIC, urb, |
23e3be11 | 1015 | slot_id, ep_index); |
2d3f1fac SS |
1016 | spin_unlock_irqrestore(&xhci->lock, flags); |
1017 | } else if (usb_endpoint_xfer_bulk(&urb->ep->desc)) { | |
1018 | spin_lock_irqsave(&xhci->lock, flags); | |
6f5165cf SS |
1019 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1020 | goto dying; | |
8df75f42 SS |
1021 | if (xhci->devs[slot_id]->eps[ep_index].ep_state & |
1022 | EP_GETTING_STREAMS) { | |
1023 | xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep " | |
1024 | "is transitioning to using streams.\n"); | |
1025 | ret = -EINVAL; | |
1026 | } else if (xhci->devs[slot_id]->eps[ep_index].ep_state & | |
1027 | EP_GETTING_NO_STREAMS) { | |
1028 | xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep " | |
1029 | "is transitioning to " | |
1030 | "not having streams.\n"); | |
1031 | ret = -EINVAL; | |
1032 | } else { | |
1033 | ret = xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb, | |
1034 | slot_id, ep_index); | |
1035 | } | |
2d3f1fac | 1036 | spin_unlock_irqrestore(&xhci->lock, flags); |
624defa1 SS |
1037 | } else if (usb_endpoint_xfer_int(&urb->ep->desc)) { |
1038 | spin_lock_irqsave(&xhci->lock, flags); | |
6f5165cf SS |
1039 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1040 | goto dying; | |
624defa1 SS |
1041 | ret = xhci_queue_intr_tx(xhci, GFP_ATOMIC, urb, |
1042 | slot_id, ep_index); | |
1043 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2d3f1fac | 1044 | } else { |
787f4e5a AX |
1045 | spin_lock_irqsave(&xhci->lock, flags); |
1046 | if (xhci->xhc_state & XHCI_STATE_DYING) | |
1047 | goto dying; | |
1048 | ret = xhci_queue_isoc_tx_prepare(xhci, GFP_ATOMIC, urb, | |
1049 | slot_id, ep_index); | |
1050 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2d3f1fac | 1051 | } |
d0e96f5a | 1052 | exit: |
d0e96f5a | 1053 | return ret; |
6f5165cf | 1054 | dying: |
8e51adcc AX |
1055 | xhci_urb_free_priv(xhci, urb_priv); |
1056 | urb->hcpriv = NULL; | |
6f5165cf SS |
1057 | xhci_dbg(xhci, "Ep 0x%x: URB %p submitted for " |
1058 | "non-responsive xHCI host.\n", | |
1059 | urb->ep->desc.bEndpointAddress, urb); | |
1060 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1061 | return -ESHUTDOWN; | |
d0e96f5a SS |
1062 | } |
1063 | ||
021bff91 SS |
1064 | /* Get the right ring for the given URB. |
1065 | * If the endpoint supports streams, boundary check the URB's stream ID. | |
1066 | * If the endpoint doesn't support streams, return the singular endpoint ring. | |
1067 | */ | |
1068 | static struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci, | |
1069 | struct urb *urb) | |
1070 | { | |
1071 | unsigned int slot_id; | |
1072 | unsigned int ep_index; | |
1073 | unsigned int stream_id; | |
1074 | struct xhci_virt_ep *ep; | |
1075 | ||
1076 | slot_id = urb->dev->slot_id; | |
1077 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); | |
1078 | stream_id = urb->stream_id; | |
1079 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
1080 | /* Common case: no streams */ | |
1081 | if (!(ep->ep_state & EP_HAS_STREAMS)) | |
1082 | return ep->ring; | |
1083 | ||
1084 | if (stream_id == 0) { | |
1085 | xhci_warn(xhci, | |
1086 | "WARN: Slot ID %u, ep index %u has streams, " | |
1087 | "but URB has no stream ID.\n", | |
1088 | slot_id, ep_index); | |
1089 | return NULL; | |
1090 | } | |
1091 | ||
1092 | if (stream_id < ep->stream_info->num_streams) | |
1093 | return ep->stream_info->stream_rings[stream_id]; | |
1094 | ||
1095 | xhci_warn(xhci, | |
1096 | "WARN: Slot ID %u, ep index %u has " | |
1097 | "stream IDs 1 to %u allocated, " | |
1098 | "but stream ID %u is requested.\n", | |
1099 | slot_id, ep_index, | |
1100 | ep->stream_info->num_streams - 1, | |
1101 | stream_id); | |
1102 | return NULL; | |
1103 | } | |
1104 | ||
ae636747 SS |
1105 | /* |
1106 | * Remove the URB's TD from the endpoint ring. This may cause the HC to stop | |
1107 | * USB transfers, potentially stopping in the middle of a TRB buffer. The HC | |
1108 | * should pick up where it left off in the TD, unless a Set Transfer Ring | |
1109 | * Dequeue Pointer is issued. | |
1110 | * | |
1111 | * The TRBs that make up the buffers for the canceled URB will be "removed" from | |
1112 | * the ring. Since the ring is a contiguous structure, they can't be physically | |
1113 | * removed. Instead, there are two options: | |
1114 | * | |
1115 | * 1) If the HC is in the middle of processing the URB to be canceled, we | |
1116 | * simply move the ring's dequeue pointer past those TRBs using the Set | |
1117 | * Transfer Ring Dequeue Pointer command. This will be the common case, | |
1118 | * when drivers timeout on the last submitted URB and attempt to cancel. | |
1119 | * | |
1120 | * 2) If the HC is in the middle of a different TD, we turn the TRBs into a | |
1121 | * series of 1-TRB transfer no-op TDs. (No-ops shouldn't be chained.) The | |
1122 | * HC will need to invalidate the any TRBs it has cached after the stop | |
1123 | * endpoint command, as noted in the xHCI 0.95 errata. | |
1124 | * | |
1125 | * 3) The TD may have completed by the time the Stop Endpoint Command | |
1126 | * completes, so software needs to handle that case too. | |
1127 | * | |
1128 | * This function should protect against the TD enqueueing code ringing the | |
1129 | * doorbell while this code is waiting for a Stop Endpoint command to complete. | |
1130 | * It also needs to account for multiple cancellations on happening at the same | |
1131 | * time for the same endpoint. | |
1132 | * | |
1133 | * Note that this function can be called in any context, or so says | |
1134 | * usb_hcd_unlink_urb() | |
d0e96f5a SS |
1135 | */ |
1136 | int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
1137 | { | |
ae636747 | 1138 | unsigned long flags; |
8e51adcc | 1139 | int ret, i; |
e34b2fbf | 1140 | u32 temp; |
ae636747 | 1141 | struct xhci_hcd *xhci; |
8e51adcc | 1142 | struct urb_priv *urb_priv; |
ae636747 SS |
1143 | struct xhci_td *td; |
1144 | unsigned int ep_index; | |
1145 | struct xhci_ring *ep_ring; | |
63a0d9ab | 1146 | struct xhci_virt_ep *ep; |
ae636747 SS |
1147 | |
1148 | xhci = hcd_to_xhci(hcd); | |
1149 | spin_lock_irqsave(&xhci->lock, flags); | |
1150 | /* Make sure the URB hasn't completed or been unlinked already */ | |
1151 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); | |
1152 | if (ret || !urb->hcpriv) | |
1153 | goto done; | |
e34b2fbf SS |
1154 | temp = xhci_readl(xhci, &xhci->op_regs->status); |
1155 | if (temp == 0xffffffff) { | |
1156 | xhci_dbg(xhci, "HW died, freeing TD.\n"); | |
8e51adcc | 1157 | urb_priv = urb->hcpriv; |
e34b2fbf SS |
1158 | |
1159 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
1160 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1161 | usb_hcd_giveback_urb(xhci_to_hcd(xhci), urb, -ESHUTDOWN); | |
8e51adcc | 1162 | xhci_urb_free_priv(xhci, urb_priv); |
e34b2fbf SS |
1163 | return ret; |
1164 | } | |
6f5165cf SS |
1165 | if (xhci->xhc_state & XHCI_STATE_DYING) { |
1166 | xhci_dbg(xhci, "Ep 0x%x: URB %p to be canceled on " | |
1167 | "non-responsive xHCI host.\n", | |
1168 | urb->ep->desc.bEndpointAddress, urb); | |
1169 | /* Let the stop endpoint command watchdog timer (which set this | |
1170 | * state) finish cleaning up the endpoint TD lists. We must | |
1171 | * have caught it in the middle of dropping a lock and giving | |
1172 | * back an URB. | |
1173 | */ | |
1174 | goto done; | |
1175 | } | |
ae636747 | 1176 | |
700e2052 | 1177 | xhci_dbg(xhci, "Cancel URB %p\n", urb); |
66e49d87 SS |
1178 | xhci_dbg(xhci, "Event ring:\n"); |
1179 | xhci_debug_ring(xhci, xhci->event_ring); | |
ae636747 | 1180 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); |
63a0d9ab | 1181 | ep = &xhci->devs[urb->dev->slot_id]->eps[ep_index]; |
e9df17eb SS |
1182 | ep_ring = xhci_urb_to_transfer_ring(xhci, urb); |
1183 | if (!ep_ring) { | |
1184 | ret = -EINVAL; | |
1185 | goto done; | |
1186 | } | |
1187 | ||
66e49d87 SS |
1188 | xhci_dbg(xhci, "Endpoint ring:\n"); |
1189 | xhci_debug_ring(xhci, ep_ring); | |
ae636747 | 1190 | |
8e51adcc AX |
1191 | urb_priv = urb->hcpriv; |
1192 | ||
1193 | for (i = urb_priv->td_cnt; i < urb_priv->length; i++) { | |
1194 | td = urb_priv->td[i]; | |
1195 | list_add_tail(&td->cancelled_td_list, &ep->cancelled_td_list); | |
1196 | } | |
1197 | ||
ae636747 SS |
1198 | /* Queue a stop endpoint command, but only if this is |
1199 | * the first cancellation to be handled. | |
1200 | */ | |
678539cf SS |
1201 | if (!(ep->ep_state & EP_HALT_PENDING)) { |
1202 | ep->ep_state |= EP_HALT_PENDING; | |
6f5165cf SS |
1203 | ep->stop_cmds_pending++; |
1204 | ep->stop_cmd_timer.expires = jiffies + | |
1205 | XHCI_STOP_EP_CMD_TIMEOUT * HZ; | |
1206 | add_timer(&ep->stop_cmd_timer); | |
be88fe4f | 1207 | xhci_queue_stop_endpoint(xhci, urb->dev->slot_id, ep_index, 0); |
23e3be11 | 1208 | xhci_ring_cmd_db(xhci); |
ae636747 SS |
1209 | } |
1210 | done: | |
1211 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1212 | return ret; | |
d0e96f5a SS |
1213 | } |
1214 | ||
f94e0186 SS |
1215 | /* Drop an endpoint from a new bandwidth configuration for this device. |
1216 | * Only one call to this function is allowed per endpoint before | |
1217 | * check_bandwidth() or reset_bandwidth() must be called. | |
1218 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will | |
1219 | * add the endpoint to the schedule with possibly new parameters denoted by a | |
1220 | * different endpoint descriptor in usb_host_endpoint. | |
1221 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is | |
1222 | * not allowed. | |
f88ba78d SS |
1223 | * |
1224 | * The USB core will not allow URBs to be queued to an endpoint that is being | |
1225 | * disabled, so there's no need for mutual exclusion to protect | |
1226 | * the xhci->devs[slot_id] structure. | |
f94e0186 SS |
1227 | */ |
1228 | int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, | |
1229 | struct usb_host_endpoint *ep) | |
1230 | { | |
f94e0186 | 1231 | struct xhci_hcd *xhci; |
d115b048 JY |
1232 | struct xhci_container_ctx *in_ctx, *out_ctx; |
1233 | struct xhci_input_control_ctx *ctrl_ctx; | |
1234 | struct xhci_slot_ctx *slot_ctx; | |
f94e0186 SS |
1235 | unsigned int last_ctx; |
1236 | unsigned int ep_index; | |
1237 | struct xhci_ep_ctx *ep_ctx; | |
1238 | u32 drop_flag; | |
1239 | u32 new_add_flags, new_drop_flags, new_slot_info; | |
1240 | int ret; | |
1241 | ||
64927730 | 1242 | ret = xhci_check_args(hcd, udev, ep, 1, true, __func__); |
f94e0186 SS |
1243 | if (ret <= 0) |
1244 | return ret; | |
1245 | xhci = hcd_to_xhci(hcd); | |
700e2052 | 1246 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
1247 | |
1248 | drop_flag = xhci_get_endpoint_flag(&ep->desc); | |
1249 | if (drop_flag == SLOT_FLAG || drop_flag == EP0_FLAG) { | |
1250 | xhci_dbg(xhci, "xHCI %s - can't drop slot or ep 0 %#x\n", | |
1251 | __func__, drop_flag); | |
1252 | return 0; | |
1253 | } | |
1254 | ||
f94e0186 | 1255 | in_ctx = xhci->devs[udev->slot_id]->in_ctx; |
d115b048 JY |
1256 | out_ctx = xhci->devs[udev->slot_id]->out_ctx; |
1257 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
f94e0186 | 1258 | ep_index = xhci_get_endpoint_index(&ep->desc); |
d115b048 | 1259 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
f94e0186 SS |
1260 | /* If the HC already knows the endpoint is disabled, |
1261 | * or the HCD has noted it is disabled, ignore this request | |
1262 | */ | |
1263 | if ((ep_ctx->ep_info & EP_STATE_MASK) == EP_STATE_DISABLED || | |
d115b048 | 1264 | ctrl_ctx->drop_flags & xhci_get_endpoint_flag(&ep->desc)) { |
700e2052 GKH |
1265 | xhci_warn(xhci, "xHCI %s called with disabled ep %p\n", |
1266 | __func__, ep); | |
f94e0186 SS |
1267 | return 0; |
1268 | } | |
1269 | ||
d115b048 JY |
1270 | ctrl_ctx->drop_flags |= drop_flag; |
1271 | new_drop_flags = ctrl_ctx->drop_flags; | |
f94e0186 | 1272 | |
0a023c6c | 1273 | ctrl_ctx->add_flags &= ~drop_flag; |
d115b048 | 1274 | new_add_flags = ctrl_ctx->add_flags; |
f94e0186 | 1275 | |
d115b048 JY |
1276 | last_ctx = xhci_last_valid_endpoint(ctrl_ctx->add_flags); |
1277 | slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); | |
f94e0186 | 1278 | /* Update the last valid endpoint context, if we deleted the last one */ |
d115b048 JY |
1279 | if ((slot_ctx->dev_info & LAST_CTX_MASK) > LAST_CTX(last_ctx)) { |
1280 | slot_ctx->dev_info &= ~LAST_CTX_MASK; | |
1281 | slot_ctx->dev_info |= LAST_CTX(last_ctx); | |
f94e0186 | 1282 | } |
d115b048 | 1283 | new_slot_info = slot_ctx->dev_info; |
f94e0186 SS |
1284 | |
1285 | xhci_endpoint_zero(xhci, xhci->devs[udev->slot_id], ep); | |
1286 | ||
f94e0186 SS |
1287 | xhci_dbg(xhci, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", |
1288 | (unsigned int) ep->desc.bEndpointAddress, | |
1289 | udev->slot_id, | |
1290 | (unsigned int) new_drop_flags, | |
1291 | (unsigned int) new_add_flags, | |
1292 | (unsigned int) new_slot_info); | |
1293 | return 0; | |
1294 | } | |
1295 | ||
1296 | /* Add an endpoint to a new possible bandwidth configuration for this device. | |
1297 | * Only one call to this function is allowed per endpoint before | |
1298 | * check_bandwidth() or reset_bandwidth() must be called. | |
1299 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will | |
1300 | * add the endpoint to the schedule with possibly new parameters denoted by a | |
1301 | * different endpoint descriptor in usb_host_endpoint. | |
1302 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is | |
1303 | * not allowed. | |
f88ba78d SS |
1304 | * |
1305 | * The USB core will not allow URBs to be queued to an endpoint until the | |
1306 | * configuration or alt setting is installed in the device, so there's no need | |
1307 | * for mutual exclusion to protect the xhci->devs[slot_id] structure. | |
f94e0186 SS |
1308 | */ |
1309 | int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, | |
1310 | struct usb_host_endpoint *ep) | |
1311 | { | |
f94e0186 | 1312 | struct xhci_hcd *xhci; |
d115b048 | 1313 | struct xhci_container_ctx *in_ctx, *out_ctx; |
f94e0186 SS |
1314 | unsigned int ep_index; |
1315 | struct xhci_ep_ctx *ep_ctx; | |
d115b048 JY |
1316 | struct xhci_slot_ctx *slot_ctx; |
1317 | struct xhci_input_control_ctx *ctrl_ctx; | |
f94e0186 SS |
1318 | u32 added_ctxs; |
1319 | unsigned int last_ctx; | |
1320 | u32 new_add_flags, new_drop_flags, new_slot_info; | |
1321 | int ret = 0; | |
1322 | ||
64927730 | 1323 | ret = xhci_check_args(hcd, udev, ep, 1, true, __func__); |
a1587d97 SS |
1324 | if (ret <= 0) { |
1325 | /* So we won't queue a reset ep command for a root hub */ | |
1326 | ep->hcpriv = NULL; | |
f94e0186 | 1327 | return ret; |
a1587d97 | 1328 | } |
f94e0186 SS |
1329 | xhci = hcd_to_xhci(hcd); |
1330 | ||
1331 | added_ctxs = xhci_get_endpoint_flag(&ep->desc); | |
1332 | last_ctx = xhci_last_valid_endpoint(added_ctxs); | |
1333 | if (added_ctxs == SLOT_FLAG || added_ctxs == EP0_FLAG) { | |
1334 | /* FIXME when we have to issue an evaluate endpoint command to | |
1335 | * deal with ep0 max packet size changing once we get the | |
1336 | * descriptors | |
1337 | */ | |
1338 | xhci_dbg(xhci, "xHCI %s - can't add slot or ep 0 %#x\n", | |
1339 | __func__, added_ctxs); | |
1340 | return 0; | |
1341 | } | |
1342 | ||
f94e0186 | 1343 | in_ctx = xhci->devs[udev->slot_id]->in_ctx; |
d115b048 JY |
1344 | out_ctx = xhci->devs[udev->slot_id]->out_ctx; |
1345 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
f94e0186 | 1346 | ep_index = xhci_get_endpoint_index(&ep->desc); |
d115b048 | 1347 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
f94e0186 SS |
1348 | /* If the HCD has already noted the endpoint is enabled, |
1349 | * ignore this request. | |
1350 | */ | |
d115b048 | 1351 | if (ctrl_ctx->add_flags & xhci_get_endpoint_flag(&ep->desc)) { |
700e2052 GKH |
1352 | xhci_warn(xhci, "xHCI %s called with enabled ep %p\n", |
1353 | __func__, ep); | |
f94e0186 SS |
1354 | return 0; |
1355 | } | |
1356 | ||
f88ba78d SS |
1357 | /* |
1358 | * Configuration and alternate setting changes must be done in | |
1359 | * process context, not interrupt context (or so documenation | |
1360 | * for usb_set_interface() and usb_set_configuration() claim). | |
1361 | */ | |
1362 | if (xhci_endpoint_init(xhci, xhci->devs[udev->slot_id], | |
319c3ea4 | 1363 | udev, ep, GFP_NOIO) < 0) { |
f94e0186 SS |
1364 | dev_dbg(&udev->dev, "%s - could not initialize ep %#x\n", |
1365 | __func__, ep->desc.bEndpointAddress); | |
f94e0186 SS |
1366 | return -ENOMEM; |
1367 | } | |
1368 | ||
d115b048 JY |
1369 | ctrl_ctx->add_flags |= added_ctxs; |
1370 | new_add_flags = ctrl_ctx->add_flags; | |
f94e0186 SS |
1371 | |
1372 | /* If xhci_endpoint_disable() was called for this endpoint, but the | |
1373 | * xHC hasn't been notified yet through the check_bandwidth() call, | |
1374 | * this re-adds a new state for the endpoint from the new endpoint | |
1375 | * descriptors. We must drop and re-add this endpoint, so we leave the | |
1376 | * drop flags alone. | |
1377 | */ | |
d115b048 | 1378 | new_drop_flags = ctrl_ctx->drop_flags; |
f94e0186 | 1379 | |
d115b048 | 1380 | slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); |
f94e0186 | 1381 | /* Update the last valid endpoint context, if we just added one past */ |
d115b048 JY |
1382 | if ((slot_ctx->dev_info & LAST_CTX_MASK) < LAST_CTX(last_ctx)) { |
1383 | slot_ctx->dev_info &= ~LAST_CTX_MASK; | |
1384 | slot_ctx->dev_info |= LAST_CTX(last_ctx); | |
f94e0186 | 1385 | } |
d115b048 | 1386 | new_slot_info = slot_ctx->dev_info; |
f94e0186 | 1387 | |
a1587d97 SS |
1388 | /* Store the usb_device pointer for later use */ |
1389 | ep->hcpriv = udev; | |
1390 | ||
f94e0186 SS |
1391 | xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", |
1392 | (unsigned int) ep->desc.bEndpointAddress, | |
1393 | udev->slot_id, | |
1394 | (unsigned int) new_drop_flags, | |
1395 | (unsigned int) new_add_flags, | |
1396 | (unsigned int) new_slot_info); | |
1397 | return 0; | |
1398 | } | |
1399 | ||
d115b048 | 1400 | static void xhci_zero_in_ctx(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev) |
f94e0186 | 1401 | { |
d115b048 | 1402 | struct xhci_input_control_ctx *ctrl_ctx; |
f94e0186 | 1403 | struct xhci_ep_ctx *ep_ctx; |
d115b048 | 1404 | struct xhci_slot_ctx *slot_ctx; |
f94e0186 SS |
1405 | int i; |
1406 | ||
1407 | /* When a device's add flag and drop flag are zero, any subsequent | |
1408 | * configure endpoint command will leave that endpoint's state | |
1409 | * untouched. Make sure we don't leave any old state in the input | |
1410 | * endpoint contexts. | |
1411 | */ | |
d115b048 JY |
1412 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
1413 | ctrl_ctx->drop_flags = 0; | |
1414 | ctrl_ctx->add_flags = 0; | |
1415 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); | |
1416 | slot_ctx->dev_info &= ~LAST_CTX_MASK; | |
f94e0186 | 1417 | /* Endpoint 0 is always valid */ |
d115b048 | 1418 | slot_ctx->dev_info |= LAST_CTX(1); |
f94e0186 | 1419 | for (i = 1; i < 31; ++i) { |
d115b048 | 1420 | ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, i); |
f94e0186 SS |
1421 | ep_ctx->ep_info = 0; |
1422 | ep_ctx->ep_info2 = 0; | |
8e595a5d | 1423 | ep_ctx->deq = 0; |
f94e0186 SS |
1424 | ep_ctx->tx_info = 0; |
1425 | } | |
1426 | } | |
1427 | ||
f2217e8e | 1428 | static int xhci_configure_endpoint_result(struct xhci_hcd *xhci, |
913a8a34 | 1429 | struct usb_device *udev, int *cmd_status) |
f2217e8e SS |
1430 | { |
1431 | int ret; | |
1432 | ||
913a8a34 | 1433 | switch (*cmd_status) { |
f2217e8e SS |
1434 | case COMP_ENOMEM: |
1435 | dev_warn(&udev->dev, "Not enough host controller resources " | |
1436 | "for new device state.\n"); | |
1437 | ret = -ENOMEM; | |
1438 | /* FIXME: can we allocate more resources for the HC? */ | |
1439 | break; | |
1440 | case COMP_BW_ERR: | |
1441 | dev_warn(&udev->dev, "Not enough bandwidth " | |
1442 | "for new device state.\n"); | |
1443 | ret = -ENOSPC; | |
1444 | /* FIXME: can we go back to the old state? */ | |
1445 | break; | |
1446 | case COMP_TRB_ERR: | |
1447 | /* the HCD set up something wrong */ | |
1448 | dev_warn(&udev->dev, "ERROR: Endpoint drop flag = 0, " | |
1449 | "add flag = 1, " | |
1450 | "and endpoint is not disabled.\n"); | |
1451 | ret = -EINVAL; | |
1452 | break; | |
1453 | case COMP_SUCCESS: | |
1454 | dev_dbg(&udev->dev, "Successful Endpoint Configure command\n"); | |
1455 | ret = 0; | |
1456 | break; | |
1457 | default: | |
1458 | xhci_err(xhci, "ERROR: unexpected command completion " | |
913a8a34 | 1459 | "code 0x%x.\n", *cmd_status); |
f2217e8e SS |
1460 | ret = -EINVAL; |
1461 | break; | |
1462 | } | |
1463 | return ret; | |
1464 | } | |
1465 | ||
1466 | static int xhci_evaluate_context_result(struct xhci_hcd *xhci, | |
913a8a34 | 1467 | struct usb_device *udev, int *cmd_status) |
f2217e8e SS |
1468 | { |
1469 | int ret; | |
913a8a34 | 1470 | struct xhci_virt_device *virt_dev = xhci->devs[udev->slot_id]; |
f2217e8e | 1471 | |
913a8a34 | 1472 | switch (*cmd_status) { |
f2217e8e SS |
1473 | case COMP_EINVAL: |
1474 | dev_warn(&udev->dev, "WARN: xHCI driver setup invalid evaluate " | |
1475 | "context command.\n"); | |
1476 | ret = -EINVAL; | |
1477 | break; | |
1478 | case COMP_EBADSLT: | |
1479 | dev_warn(&udev->dev, "WARN: slot not enabled for" | |
1480 | "evaluate context command.\n"); | |
1481 | case COMP_CTX_STATE: | |
1482 | dev_warn(&udev->dev, "WARN: invalid context state for " | |
1483 | "evaluate context command.\n"); | |
1484 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 1); | |
1485 | ret = -EINVAL; | |
1486 | break; | |
1487 | case COMP_SUCCESS: | |
1488 | dev_dbg(&udev->dev, "Successful evaluate context command\n"); | |
1489 | ret = 0; | |
1490 | break; | |
1491 | default: | |
1492 | xhci_err(xhci, "ERROR: unexpected command completion " | |
913a8a34 | 1493 | "code 0x%x.\n", *cmd_status); |
f2217e8e SS |
1494 | ret = -EINVAL; |
1495 | break; | |
1496 | } | |
1497 | return ret; | |
1498 | } | |
1499 | ||
1500 | /* Issue a configure endpoint command or evaluate context command | |
1501 | * and wait for it to finish. | |
1502 | */ | |
1503 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, | |
913a8a34 SS |
1504 | struct usb_device *udev, |
1505 | struct xhci_command *command, | |
1506 | bool ctx_change, bool must_succeed) | |
f2217e8e SS |
1507 | { |
1508 | int ret; | |
1509 | int timeleft; | |
1510 | unsigned long flags; | |
913a8a34 SS |
1511 | struct xhci_container_ctx *in_ctx; |
1512 | struct completion *cmd_completion; | |
1513 | int *cmd_status; | |
1514 | struct xhci_virt_device *virt_dev; | |
f2217e8e SS |
1515 | |
1516 | spin_lock_irqsave(&xhci->lock, flags); | |
913a8a34 SS |
1517 | virt_dev = xhci->devs[udev->slot_id]; |
1518 | if (command) { | |
1519 | in_ctx = command->in_ctx; | |
1520 | cmd_completion = command->completion; | |
1521 | cmd_status = &command->status; | |
1522 | command->command_trb = xhci->cmd_ring->enqueue; | |
7a3783ef PZ |
1523 | |
1524 | /* Enqueue pointer can be left pointing to the link TRB, | |
1525 | * we must handle that | |
1526 | */ | |
1527 | if ((command->command_trb->link.control & TRB_TYPE_BITMASK) | |
1528 | == TRB_TYPE(TRB_LINK)) | |
1529 | command->command_trb = | |
1530 | xhci->cmd_ring->enq_seg->next->trbs; | |
1531 | ||
913a8a34 SS |
1532 | list_add_tail(&command->cmd_list, &virt_dev->cmd_list); |
1533 | } else { | |
1534 | in_ctx = virt_dev->in_ctx; | |
1535 | cmd_completion = &virt_dev->cmd_completion; | |
1536 | cmd_status = &virt_dev->cmd_status; | |
1537 | } | |
1d68064a | 1538 | init_completion(cmd_completion); |
913a8a34 | 1539 | |
f2217e8e | 1540 | if (!ctx_change) |
913a8a34 SS |
1541 | ret = xhci_queue_configure_endpoint(xhci, in_ctx->dma, |
1542 | udev->slot_id, must_succeed); | |
f2217e8e | 1543 | else |
913a8a34 | 1544 | ret = xhci_queue_evaluate_context(xhci, in_ctx->dma, |
f2217e8e SS |
1545 | udev->slot_id); |
1546 | if (ret < 0) { | |
c01591bd SS |
1547 | if (command) |
1548 | list_del(&command->cmd_list); | |
f2217e8e SS |
1549 | spin_unlock_irqrestore(&xhci->lock, flags); |
1550 | xhci_dbg(xhci, "FIXME allocate a new ring segment\n"); | |
1551 | return -ENOMEM; | |
1552 | } | |
1553 | xhci_ring_cmd_db(xhci); | |
1554 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1555 | ||
1556 | /* Wait for the configure endpoint command to complete */ | |
1557 | timeleft = wait_for_completion_interruptible_timeout( | |
913a8a34 | 1558 | cmd_completion, |
f2217e8e SS |
1559 | USB_CTRL_SET_TIMEOUT); |
1560 | if (timeleft <= 0) { | |
1561 | xhci_warn(xhci, "%s while waiting for %s command\n", | |
1562 | timeleft == 0 ? "Timeout" : "Signal", | |
1563 | ctx_change == 0 ? | |
1564 | "configure endpoint" : | |
1565 | "evaluate context"); | |
1566 | /* FIXME cancel the configure endpoint command */ | |
1567 | return -ETIME; | |
1568 | } | |
1569 | ||
1570 | if (!ctx_change) | |
913a8a34 SS |
1571 | return xhci_configure_endpoint_result(xhci, udev, cmd_status); |
1572 | return xhci_evaluate_context_result(xhci, udev, cmd_status); | |
f2217e8e SS |
1573 | } |
1574 | ||
f88ba78d SS |
1575 | /* Called after one or more calls to xhci_add_endpoint() or |
1576 | * xhci_drop_endpoint(). If this call fails, the USB core is expected | |
1577 | * to call xhci_reset_bandwidth(). | |
1578 | * | |
1579 | * Since we are in the middle of changing either configuration or | |
1580 | * installing a new alt setting, the USB core won't allow URBs to be | |
1581 | * enqueued for any endpoint on the old config or interface. Nothing | |
1582 | * else should be touching the xhci->devs[slot_id] structure, so we | |
1583 | * don't need to take the xhci->lock for manipulating that. | |
1584 | */ | |
f94e0186 SS |
1585 | int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) |
1586 | { | |
1587 | int i; | |
1588 | int ret = 0; | |
f94e0186 SS |
1589 | struct xhci_hcd *xhci; |
1590 | struct xhci_virt_device *virt_dev; | |
d115b048 JY |
1591 | struct xhci_input_control_ctx *ctrl_ctx; |
1592 | struct xhci_slot_ctx *slot_ctx; | |
f94e0186 | 1593 | |
64927730 | 1594 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
f94e0186 SS |
1595 | if (ret <= 0) |
1596 | return ret; | |
1597 | xhci = hcd_to_xhci(hcd); | |
1598 | ||
700e2052 | 1599 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
1600 | virt_dev = xhci->devs[udev->slot_id]; |
1601 | ||
1602 | /* See section 4.6.6 - A0 = 1; A1 = D0 = D1 = 0 */ | |
d115b048 JY |
1603 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
1604 | ctrl_ctx->add_flags |= SLOT_FLAG; | |
1605 | ctrl_ctx->add_flags &= ~EP0_FLAG; | |
1606 | ctrl_ctx->drop_flags &= ~SLOT_FLAG; | |
1607 | ctrl_ctx->drop_flags &= ~EP0_FLAG; | |
f94e0186 | 1608 | xhci_dbg(xhci, "New Input Control Context:\n"); |
d115b048 JY |
1609 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
1610 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, | |
1611 | LAST_CTX_TO_EP_NUM(slot_ctx->dev_info)); | |
f94e0186 | 1612 | |
913a8a34 SS |
1613 | ret = xhci_configure_endpoint(xhci, udev, NULL, |
1614 | false, false); | |
f94e0186 SS |
1615 | if (ret) { |
1616 | /* Callee should call reset_bandwidth() */ | |
f94e0186 SS |
1617 | return ret; |
1618 | } | |
1619 | ||
1620 | xhci_dbg(xhci, "Output context after successful config ep cmd:\n"); | |
d115b048 JY |
1621 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, |
1622 | LAST_CTX_TO_EP_NUM(slot_ctx->dev_info)); | |
f94e0186 | 1623 | |
d115b048 | 1624 | xhci_zero_in_ctx(xhci, virt_dev); |
74f9fe21 | 1625 | /* Install new rings and free or cache any old rings */ |
f94e0186 | 1626 | for (i = 1; i < 31; ++i) { |
74f9fe21 SS |
1627 | if (!virt_dev->eps[i].new_ring) |
1628 | continue; | |
1629 | /* Only cache or free the old ring if it exists. | |
1630 | * It may not if this is the first add of an endpoint. | |
1631 | */ | |
1632 | if (virt_dev->eps[i].ring) { | |
412566bd | 1633 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); |
f94e0186 | 1634 | } |
74f9fe21 SS |
1635 | virt_dev->eps[i].ring = virt_dev->eps[i].new_ring; |
1636 | virt_dev->eps[i].new_ring = NULL; | |
f94e0186 SS |
1637 | } |
1638 | ||
f94e0186 SS |
1639 | return ret; |
1640 | } | |
1641 | ||
1642 | void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) | |
1643 | { | |
f94e0186 SS |
1644 | struct xhci_hcd *xhci; |
1645 | struct xhci_virt_device *virt_dev; | |
1646 | int i, ret; | |
1647 | ||
64927730 | 1648 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
f94e0186 SS |
1649 | if (ret <= 0) |
1650 | return; | |
1651 | xhci = hcd_to_xhci(hcd); | |
1652 | ||
700e2052 | 1653 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
1654 | virt_dev = xhci->devs[udev->slot_id]; |
1655 | /* Free any rings allocated for added endpoints */ | |
1656 | for (i = 0; i < 31; ++i) { | |
63a0d9ab SS |
1657 | if (virt_dev->eps[i].new_ring) { |
1658 | xhci_ring_free(xhci, virt_dev->eps[i].new_ring); | |
1659 | virt_dev->eps[i].new_ring = NULL; | |
f94e0186 SS |
1660 | } |
1661 | } | |
d115b048 | 1662 | xhci_zero_in_ctx(xhci, virt_dev); |
f94e0186 SS |
1663 | } |
1664 | ||
5270b951 | 1665 | static void xhci_setup_input_ctx_for_config_ep(struct xhci_hcd *xhci, |
913a8a34 SS |
1666 | struct xhci_container_ctx *in_ctx, |
1667 | struct xhci_container_ctx *out_ctx, | |
1668 | u32 add_flags, u32 drop_flags) | |
5270b951 SS |
1669 | { |
1670 | struct xhci_input_control_ctx *ctrl_ctx; | |
913a8a34 | 1671 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); |
5270b951 SS |
1672 | ctrl_ctx->add_flags = add_flags; |
1673 | ctrl_ctx->drop_flags = drop_flags; | |
913a8a34 | 1674 | xhci_slot_copy(xhci, in_ctx, out_ctx); |
5270b951 SS |
1675 | ctrl_ctx->add_flags |= SLOT_FLAG; |
1676 | ||
913a8a34 SS |
1677 | xhci_dbg(xhci, "Input Context:\n"); |
1678 | xhci_dbg_ctx(xhci, in_ctx, xhci_last_valid_endpoint(add_flags)); | |
5270b951 SS |
1679 | } |
1680 | ||
ac9d8fe7 SS |
1681 | void xhci_setup_input_ctx_for_quirk(struct xhci_hcd *xhci, |
1682 | unsigned int slot_id, unsigned int ep_index, | |
1683 | struct xhci_dequeue_state *deq_state) | |
1684 | { | |
1685 | struct xhci_container_ctx *in_ctx; | |
ac9d8fe7 SS |
1686 | struct xhci_ep_ctx *ep_ctx; |
1687 | u32 added_ctxs; | |
1688 | dma_addr_t addr; | |
1689 | ||
913a8a34 SS |
1690 | xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, |
1691 | xhci->devs[slot_id]->out_ctx, ep_index); | |
ac9d8fe7 SS |
1692 | in_ctx = xhci->devs[slot_id]->in_ctx; |
1693 | ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); | |
1694 | addr = xhci_trb_virt_to_dma(deq_state->new_deq_seg, | |
1695 | deq_state->new_deq_ptr); | |
1696 | if (addr == 0) { | |
1697 | xhci_warn(xhci, "WARN Cannot submit config ep after " | |
1698 | "reset ep command\n"); | |
1699 | xhci_warn(xhci, "WARN deq seg = %p, deq ptr = %p\n", | |
1700 | deq_state->new_deq_seg, | |
1701 | deq_state->new_deq_ptr); | |
1702 | return; | |
1703 | } | |
1704 | ep_ctx->deq = addr | deq_state->new_cycle_state; | |
1705 | ||
ac9d8fe7 | 1706 | added_ctxs = xhci_get_endpoint_flag_from_index(ep_index); |
913a8a34 SS |
1707 | xhci_setup_input_ctx_for_config_ep(xhci, xhci->devs[slot_id]->in_ctx, |
1708 | xhci->devs[slot_id]->out_ctx, added_ctxs, added_ctxs); | |
ac9d8fe7 SS |
1709 | } |
1710 | ||
82d1009f | 1711 | void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci, |
63a0d9ab | 1712 | struct usb_device *udev, unsigned int ep_index) |
82d1009f SS |
1713 | { |
1714 | struct xhci_dequeue_state deq_state; | |
63a0d9ab | 1715 | struct xhci_virt_ep *ep; |
82d1009f SS |
1716 | |
1717 | xhci_dbg(xhci, "Cleaning up stalled endpoint ring\n"); | |
63a0d9ab | 1718 | ep = &xhci->devs[udev->slot_id]->eps[ep_index]; |
82d1009f SS |
1719 | /* We need to move the HW's dequeue pointer past this TD, |
1720 | * or it will attempt to resend it on the next doorbell ring. | |
1721 | */ | |
1722 | xhci_find_new_dequeue_state(xhci, udev->slot_id, | |
e9df17eb | 1723 | ep_index, ep->stopped_stream, ep->stopped_td, |
ac9d8fe7 | 1724 | &deq_state); |
82d1009f | 1725 | |
ac9d8fe7 SS |
1726 | /* HW with the reset endpoint quirk will use the saved dequeue state to |
1727 | * issue a configure endpoint command later. | |
1728 | */ | |
1729 | if (!(xhci->quirks & XHCI_RESET_EP_QUIRK)) { | |
1730 | xhci_dbg(xhci, "Queueing new dequeue state\n"); | |
63a0d9ab | 1731 | xhci_queue_new_dequeue_state(xhci, udev->slot_id, |
e9df17eb | 1732 | ep_index, ep->stopped_stream, &deq_state); |
ac9d8fe7 SS |
1733 | } else { |
1734 | /* Better hope no one uses the input context between now and the | |
1735 | * reset endpoint completion! | |
e9df17eb SS |
1736 | * XXX: No idea how this hardware will react when stream rings |
1737 | * are enabled. | |
ac9d8fe7 SS |
1738 | */ |
1739 | xhci_dbg(xhci, "Setting up input context for " | |
1740 | "configure endpoint command\n"); | |
1741 | xhci_setup_input_ctx_for_quirk(xhci, udev->slot_id, | |
1742 | ep_index, &deq_state); | |
1743 | } | |
82d1009f SS |
1744 | } |
1745 | ||
a1587d97 SS |
1746 | /* Deal with stalled endpoints. The core should have sent the control message |
1747 | * to clear the halt condition. However, we need to make the xHCI hardware | |
1748 | * reset its sequence number, since a device will expect a sequence number of | |
1749 | * zero after the halt condition is cleared. | |
1750 | * Context: in_interrupt | |
1751 | */ | |
1752 | void xhci_endpoint_reset(struct usb_hcd *hcd, | |
1753 | struct usb_host_endpoint *ep) | |
1754 | { | |
1755 | struct xhci_hcd *xhci; | |
1756 | struct usb_device *udev; | |
1757 | unsigned int ep_index; | |
1758 | unsigned long flags; | |
1759 | int ret; | |
63a0d9ab | 1760 | struct xhci_virt_ep *virt_ep; |
a1587d97 SS |
1761 | |
1762 | xhci = hcd_to_xhci(hcd); | |
1763 | udev = (struct usb_device *) ep->hcpriv; | |
1764 | /* Called with a root hub endpoint (or an endpoint that wasn't added | |
1765 | * with xhci_add_endpoint() | |
1766 | */ | |
1767 | if (!ep->hcpriv) | |
1768 | return; | |
1769 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
63a0d9ab SS |
1770 | virt_ep = &xhci->devs[udev->slot_id]->eps[ep_index]; |
1771 | if (!virt_ep->stopped_td) { | |
c92bcfa7 SS |
1772 | xhci_dbg(xhci, "Endpoint 0x%x not halted, refusing to reset.\n", |
1773 | ep->desc.bEndpointAddress); | |
1774 | return; | |
1775 | } | |
82d1009f SS |
1776 | if (usb_endpoint_xfer_control(&ep->desc)) { |
1777 | xhci_dbg(xhci, "Control endpoint stall already handled.\n"); | |
1778 | return; | |
1779 | } | |
a1587d97 SS |
1780 | |
1781 | xhci_dbg(xhci, "Queueing reset endpoint command\n"); | |
1782 | spin_lock_irqsave(&xhci->lock, flags); | |
1783 | ret = xhci_queue_reset_ep(xhci, udev->slot_id, ep_index); | |
c92bcfa7 SS |
1784 | /* |
1785 | * Can't change the ring dequeue pointer until it's transitioned to the | |
1786 | * stopped state, which is only upon a successful reset endpoint | |
1787 | * command. Better hope that last command worked! | |
1788 | */ | |
a1587d97 | 1789 | if (!ret) { |
63a0d9ab SS |
1790 | xhci_cleanup_stalled_ring(xhci, udev, ep_index); |
1791 | kfree(virt_ep->stopped_td); | |
a1587d97 SS |
1792 | xhci_ring_cmd_db(xhci); |
1793 | } | |
1624ae1c SS |
1794 | virt_ep->stopped_td = NULL; |
1795 | virt_ep->stopped_trb = NULL; | |
5e5cf6fc | 1796 | virt_ep->stopped_stream = 0; |
a1587d97 SS |
1797 | spin_unlock_irqrestore(&xhci->lock, flags); |
1798 | ||
1799 | if (ret) | |
1800 | xhci_warn(xhci, "FIXME allocate a new ring segment\n"); | |
1801 | } | |
1802 | ||
8df75f42 SS |
1803 | static int xhci_check_streams_endpoint(struct xhci_hcd *xhci, |
1804 | struct usb_device *udev, struct usb_host_endpoint *ep, | |
1805 | unsigned int slot_id) | |
1806 | { | |
1807 | int ret; | |
1808 | unsigned int ep_index; | |
1809 | unsigned int ep_state; | |
1810 | ||
1811 | if (!ep) | |
1812 | return -EINVAL; | |
64927730 | 1813 | ret = xhci_check_args(xhci_to_hcd(xhci), udev, ep, 1, true, __func__); |
8df75f42 SS |
1814 | if (ret <= 0) |
1815 | return -EINVAL; | |
842f1690 | 1816 | if (ep->ss_ep_comp.bmAttributes == 0) { |
8df75f42 SS |
1817 | xhci_warn(xhci, "WARN: SuperSpeed Endpoint Companion" |
1818 | " descriptor for ep 0x%x does not support streams\n", | |
1819 | ep->desc.bEndpointAddress); | |
1820 | return -EINVAL; | |
1821 | } | |
1822 | ||
1823 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
1824 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; | |
1825 | if (ep_state & EP_HAS_STREAMS || | |
1826 | ep_state & EP_GETTING_STREAMS) { | |
1827 | xhci_warn(xhci, "WARN: SuperSpeed bulk endpoint 0x%x " | |
1828 | "already has streams set up.\n", | |
1829 | ep->desc.bEndpointAddress); | |
1830 | xhci_warn(xhci, "Send email to xHCI maintainer and ask for " | |
1831 | "dynamic stream context array reallocation.\n"); | |
1832 | return -EINVAL; | |
1833 | } | |
1834 | if (!list_empty(&xhci->devs[slot_id]->eps[ep_index].ring->td_list)) { | |
1835 | xhci_warn(xhci, "Cannot setup streams for SuperSpeed bulk " | |
1836 | "endpoint 0x%x; URBs are pending.\n", | |
1837 | ep->desc.bEndpointAddress); | |
1838 | return -EINVAL; | |
1839 | } | |
1840 | return 0; | |
1841 | } | |
1842 | ||
1843 | static void xhci_calculate_streams_entries(struct xhci_hcd *xhci, | |
1844 | unsigned int *num_streams, unsigned int *num_stream_ctxs) | |
1845 | { | |
1846 | unsigned int max_streams; | |
1847 | ||
1848 | /* The stream context array size must be a power of two */ | |
1849 | *num_stream_ctxs = roundup_pow_of_two(*num_streams); | |
1850 | /* | |
1851 | * Find out how many primary stream array entries the host controller | |
1852 | * supports. Later we may use secondary stream arrays (similar to 2nd | |
1853 | * level page entries), but that's an optional feature for xHCI host | |
1854 | * controllers. xHCs must support at least 4 stream IDs. | |
1855 | */ | |
1856 | max_streams = HCC_MAX_PSA(xhci->hcc_params); | |
1857 | if (*num_stream_ctxs > max_streams) { | |
1858 | xhci_dbg(xhci, "xHCI HW only supports %u stream ctx entries.\n", | |
1859 | max_streams); | |
1860 | *num_stream_ctxs = max_streams; | |
1861 | *num_streams = max_streams; | |
1862 | } | |
1863 | } | |
1864 | ||
1865 | /* Returns an error code if one of the endpoint already has streams. | |
1866 | * This does not change any data structures, it only checks and gathers | |
1867 | * information. | |
1868 | */ | |
1869 | static int xhci_calculate_streams_and_bitmask(struct xhci_hcd *xhci, | |
1870 | struct usb_device *udev, | |
1871 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
1872 | unsigned int *num_streams, u32 *changed_ep_bitmask) | |
1873 | { | |
8df75f42 SS |
1874 | unsigned int max_streams; |
1875 | unsigned int endpoint_flag; | |
1876 | int i; | |
1877 | int ret; | |
1878 | ||
1879 | for (i = 0; i < num_eps; i++) { | |
1880 | ret = xhci_check_streams_endpoint(xhci, udev, | |
1881 | eps[i], udev->slot_id); | |
1882 | if (ret < 0) | |
1883 | return ret; | |
1884 | ||
842f1690 AS |
1885 | max_streams = USB_SS_MAX_STREAMS( |
1886 | eps[i]->ss_ep_comp.bmAttributes); | |
8df75f42 SS |
1887 | if (max_streams < (*num_streams - 1)) { |
1888 | xhci_dbg(xhci, "Ep 0x%x only supports %u stream IDs.\n", | |
1889 | eps[i]->desc.bEndpointAddress, | |
1890 | max_streams); | |
1891 | *num_streams = max_streams+1; | |
1892 | } | |
1893 | ||
1894 | endpoint_flag = xhci_get_endpoint_flag(&eps[i]->desc); | |
1895 | if (*changed_ep_bitmask & endpoint_flag) | |
1896 | return -EINVAL; | |
1897 | *changed_ep_bitmask |= endpoint_flag; | |
1898 | } | |
1899 | return 0; | |
1900 | } | |
1901 | ||
1902 | static u32 xhci_calculate_no_streams_bitmask(struct xhci_hcd *xhci, | |
1903 | struct usb_device *udev, | |
1904 | struct usb_host_endpoint **eps, unsigned int num_eps) | |
1905 | { | |
1906 | u32 changed_ep_bitmask = 0; | |
1907 | unsigned int slot_id; | |
1908 | unsigned int ep_index; | |
1909 | unsigned int ep_state; | |
1910 | int i; | |
1911 | ||
1912 | slot_id = udev->slot_id; | |
1913 | if (!xhci->devs[slot_id]) | |
1914 | return 0; | |
1915 | ||
1916 | for (i = 0; i < num_eps; i++) { | |
1917 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
1918 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; | |
1919 | /* Are streams already being freed for the endpoint? */ | |
1920 | if (ep_state & EP_GETTING_NO_STREAMS) { | |
1921 | xhci_warn(xhci, "WARN Can't disable streams for " | |
1922 | "endpoint 0x%x\n, " | |
1923 | "streams are being disabled already.", | |
1924 | eps[i]->desc.bEndpointAddress); | |
1925 | return 0; | |
1926 | } | |
1927 | /* Are there actually any streams to free? */ | |
1928 | if (!(ep_state & EP_HAS_STREAMS) && | |
1929 | !(ep_state & EP_GETTING_STREAMS)) { | |
1930 | xhci_warn(xhci, "WARN Can't disable streams for " | |
1931 | "endpoint 0x%x\n, " | |
1932 | "streams are already disabled!", | |
1933 | eps[i]->desc.bEndpointAddress); | |
1934 | xhci_warn(xhci, "WARN xhci_free_streams() called " | |
1935 | "with non-streams endpoint\n"); | |
1936 | return 0; | |
1937 | } | |
1938 | changed_ep_bitmask |= xhci_get_endpoint_flag(&eps[i]->desc); | |
1939 | } | |
1940 | return changed_ep_bitmask; | |
1941 | } | |
1942 | ||
1943 | /* | |
1944 | * The USB device drivers use this function (though the HCD interface in USB | |
1945 | * core) to prepare a set of bulk endpoints to use streams. Streams are used to | |
1946 | * coordinate mass storage command queueing across multiple endpoints (basically | |
1947 | * a stream ID == a task ID). | |
1948 | * | |
1949 | * Setting up streams involves allocating the same size stream context array | |
1950 | * for each endpoint and issuing a configure endpoint command for all endpoints. | |
1951 | * | |
1952 | * Don't allow the call to succeed if one endpoint only supports one stream | |
1953 | * (which means it doesn't support streams at all). | |
1954 | * | |
1955 | * Drivers may get less stream IDs than they asked for, if the host controller | |
1956 | * hardware or endpoints claim they can't support the number of requested | |
1957 | * stream IDs. | |
1958 | */ | |
1959 | int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, | |
1960 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
1961 | unsigned int num_streams, gfp_t mem_flags) | |
1962 | { | |
1963 | int i, ret; | |
1964 | struct xhci_hcd *xhci; | |
1965 | struct xhci_virt_device *vdev; | |
1966 | struct xhci_command *config_cmd; | |
1967 | unsigned int ep_index; | |
1968 | unsigned int num_stream_ctxs; | |
1969 | unsigned long flags; | |
1970 | u32 changed_ep_bitmask = 0; | |
1971 | ||
1972 | if (!eps) | |
1973 | return -EINVAL; | |
1974 | ||
1975 | /* Add one to the number of streams requested to account for | |
1976 | * stream 0 that is reserved for xHCI usage. | |
1977 | */ | |
1978 | num_streams += 1; | |
1979 | xhci = hcd_to_xhci(hcd); | |
1980 | xhci_dbg(xhci, "Driver wants %u stream IDs (including stream 0).\n", | |
1981 | num_streams); | |
1982 | ||
1983 | config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); | |
1984 | if (!config_cmd) { | |
1985 | xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); | |
1986 | return -ENOMEM; | |
1987 | } | |
1988 | ||
1989 | /* Check to make sure all endpoints are not already configured for | |
1990 | * streams. While we're at it, find the maximum number of streams that | |
1991 | * all the endpoints will support and check for duplicate endpoints. | |
1992 | */ | |
1993 | spin_lock_irqsave(&xhci->lock, flags); | |
1994 | ret = xhci_calculate_streams_and_bitmask(xhci, udev, eps, | |
1995 | num_eps, &num_streams, &changed_ep_bitmask); | |
1996 | if (ret < 0) { | |
1997 | xhci_free_command(xhci, config_cmd); | |
1998 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1999 | return ret; | |
2000 | } | |
2001 | if (num_streams <= 1) { | |
2002 | xhci_warn(xhci, "WARN: endpoints can't handle " | |
2003 | "more than one stream.\n"); | |
2004 | xhci_free_command(xhci, config_cmd); | |
2005 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2006 | return -EINVAL; | |
2007 | } | |
2008 | vdev = xhci->devs[udev->slot_id]; | |
2009 | /* Mark each endpoint as being in transistion, so | |
2010 | * xhci_urb_enqueue() will reject all URBs. | |
2011 | */ | |
2012 | for (i = 0; i < num_eps; i++) { | |
2013 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2014 | vdev->eps[ep_index].ep_state |= EP_GETTING_STREAMS; | |
2015 | } | |
2016 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2017 | ||
2018 | /* Setup internal data structures and allocate HW data structures for | |
2019 | * streams (but don't install the HW structures in the input context | |
2020 | * until we're sure all memory allocation succeeded). | |
2021 | */ | |
2022 | xhci_calculate_streams_entries(xhci, &num_streams, &num_stream_ctxs); | |
2023 | xhci_dbg(xhci, "Need %u stream ctx entries for %u stream IDs.\n", | |
2024 | num_stream_ctxs, num_streams); | |
2025 | ||
2026 | for (i = 0; i < num_eps; i++) { | |
2027 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2028 | vdev->eps[ep_index].stream_info = xhci_alloc_stream_info(xhci, | |
2029 | num_stream_ctxs, | |
2030 | num_streams, mem_flags); | |
2031 | if (!vdev->eps[ep_index].stream_info) | |
2032 | goto cleanup; | |
2033 | /* Set maxPstreams in endpoint context and update deq ptr to | |
2034 | * point to stream context array. FIXME | |
2035 | */ | |
2036 | } | |
2037 | ||
2038 | /* Set up the input context for a configure endpoint command. */ | |
2039 | for (i = 0; i < num_eps; i++) { | |
2040 | struct xhci_ep_ctx *ep_ctx; | |
2041 | ||
2042 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2043 | ep_ctx = xhci_get_ep_ctx(xhci, config_cmd->in_ctx, ep_index); | |
2044 | ||
2045 | xhci_endpoint_copy(xhci, config_cmd->in_ctx, | |
2046 | vdev->out_ctx, ep_index); | |
2047 | xhci_setup_streams_ep_input_ctx(xhci, ep_ctx, | |
2048 | vdev->eps[ep_index].stream_info); | |
2049 | } | |
2050 | /* Tell the HW to drop its old copy of the endpoint context info | |
2051 | * and add the updated copy from the input context. | |
2052 | */ | |
2053 | xhci_setup_input_ctx_for_config_ep(xhci, config_cmd->in_ctx, | |
2054 | vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); | |
2055 | ||
2056 | /* Issue and wait for the configure endpoint command */ | |
2057 | ret = xhci_configure_endpoint(xhci, udev, config_cmd, | |
2058 | false, false); | |
2059 | ||
2060 | /* xHC rejected the configure endpoint command for some reason, so we | |
2061 | * leave the old ring intact and free our internal streams data | |
2062 | * structure. | |
2063 | */ | |
2064 | if (ret < 0) | |
2065 | goto cleanup; | |
2066 | ||
2067 | spin_lock_irqsave(&xhci->lock, flags); | |
2068 | for (i = 0; i < num_eps; i++) { | |
2069 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2070 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; | |
2071 | xhci_dbg(xhci, "Slot %u ep ctx %u now has streams.\n", | |
2072 | udev->slot_id, ep_index); | |
2073 | vdev->eps[ep_index].ep_state |= EP_HAS_STREAMS; | |
2074 | } | |
2075 | xhci_free_command(xhci, config_cmd); | |
2076 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2077 | ||
2078 | /* Subtract 1 for stream 0, which drivers can't use */ | |
2079 | return num_streams - 1; | |
2080 | ||
2081 | cleanup: | |
2082 | /* If it didn't work, free the streams! */ | |
2083 | for (i = 0; i < num_eps; i++) { | |
2084 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2085 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); | |
8a007748 | 2086 | vdev->eps[ep_index].stream_info = NULL; |
8df75f42 SS |
2087 | /* FIXME Unset maxPstreams in endpoint context and |
2088 | * update deq ptr to point to normal string ring. | |
2089 | */ | |
2090 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; | |
2091 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; | |
2092 | xhci_endpoint_zero(xhci, vdev, eps[i]); | |
2093 | } | |
2094 | xhci_free_command(xhci, config_cmd); | |
2095 | return -ENOMEM; | |
2096 | } | |
2097 | ||
2098 | /* Transition the endpoint from using streams to being a "normal" endpoint | |
2099 | * without streams. | |
2100 | * | |
2101 | * Modify the endpoint context state, submit a configure endpoint command, | |
2102 | * and free all endpoint rings for streams if that completes successfully. | |
2103 | */ | |
2104 | int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev, | |
2105 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2106 | gfp_t mem_flags) | |
2107 | { | |
2108 | int i, ret; | |
2109 | struct xhci_hcd *xhci; | |
2110 | struct xhci_virt_device *vdev; | |
2111 | struct xhci_command *command; | |
2112 | unsigned int ep_index; | |
2113 | unsigned long flags; | |
2114 | u32 changed_ep_bitmask; | |
2115 | ||
2116 | xhci = hcd_to_xhci(hcd); | |
2117 | vdev = xhci->devs[udev->slot_id]; | |
2118 | ||
2119 | /* Set up a configure endpoint command to remove the streams rings */ | |
2120 | spin_lock_irqsave(&xhci->lock, flags); | |
2121 | changed_ep_bitmask = xhci_calculate_no_streams_bitmask(xhci, | |
2122 | udev, eps, num_eps); | |
2123 | if (changed_ep_bitmask == 0) { | |
2124 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2125 | return -EINVAL; | |
2126 | } | |
2127 | ||
2128 | /* Use the xhci_command structure from the first endpoint. We may have | |
2129 | * allocated too many, but the driver may call xhci_free_streams() for | |
2130 | * each endpoint it grouped into one call to xhci_alloc_streams(). | |
2131 | */ | |
2132 | ep_index = xhci_get_endpoint_index(&eps[0]->desc); | |
2133 | command = vdev->eps[ep_index].stream_info->free_streams_command; | |
2134 | for (i = 0; i < num_eps; i++) { | |
2135 | struct xhci_ep_ctx *ep_ctx; | |
2136 | ||
2137 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2138 | ep_ctx = xhci_get_ep_ctx(xhci, command->in_ctx, ep_index); | |
2139 | xhci->devs[udev->slot_id]->eps[ep_index].ep_state |= | |
2140 | EP_GETTING_NO_STREAMS; | |
2141 | ||
2142 | xhci_endpoint_copy(xhci, command->in_ctx, | |
2143 | vdev->out_ctx, ep_index); | |
2144 | xhci_setup_no_streams_ep_input_ctx(xhci, ep_ctx, | |
2145 | &vdev->eps[ep_index]); | |
2146 | } | |
2147 | xhci_setup_input_ctx_for_config_ep(xhci, command->in_ctx, | |
2148 | vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); | |
2149 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2150 | ||
2151 | /* Issue and wait for the configure endpoint command, | |
2152 | * which must succeed. | |
2153 | */ | |
2154 | ret = xhci_configure_endpoint(xhci, udev, command, | |
2155 | false, true); | |
2156 | ||
2157 | /* xHC rejected the configure endpoint command for some reason, so we | |
2158 | * leave the streams rings intact. | |
2159 | */ | |
2160 | if (ret < 0) | |
2161 | return ret; | |
2162 | ||
2163 | spin_lock_irqsave(&xhci->lock, flags); | |
2164 | for (i = 0; i < num_eps; i++) { | |
2165 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2166 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); | |
8a007748 | 2167 | vdev->eps[ep_index].stream_info = NULL; |
8df75f42 SS |
2168 | /* FIXME Unset maxPstreams in endpoint context and |
2169 | * update deq ptr to point to normal string ring. | |
2170 | */ | |
2171 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_NO_STREAMS; | |
2172 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; | |
2173 | } | |
2174 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2175 | ||
2176 | return 0; | |
2177 | } | |
2178 | ||
2a8f82c4 SS |
2179 | /* |
2180 | * This submits a Reset Device Command, which will set the device state to 0, | |
2181 | * set the device address to 0, and disable all the endpoints except the default | |
2182 | * control endpoint. The USB core should come back and call | |
2183 | * xhci_address_device(), and then re-set up the configuration. If this is | |
2184 | * called because of a usb_reset_and_verify_device(), then the old alternate | |
2185 | * settings will be re-installed through the normal bandwidth allocation | |
2186 | * functions. | |
2187 | * | |
2188 | * Wait for the Reset Device command to finish. Remove all structures | |
2189 | * associated with the endpoints that were disabled. Clear the input device | |
2190 | * structure? Cache the rings? Reset the control endpoint 0 max packet size? | |
f0615c45 AX |
2191 | * |
2192 | * If the virt_dev to be reset does not exist or does not match the udev, | |
2193 | * it means the device is lost, possibly due to the xHC restore error and | |
2194 | * re-initialization during S3/S4. In this case, call xhci_alloc_dev() to | |
2195 | * re-allocate the device. | |
2a8f82c4 | 2196 | */ |
f0615c45 | 2197 | int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev) |
2a8f82c4 SS |
2198 | { |
2199 | int ret, i; | |
2200 | unsigned long flags; | |
2201 | struct xhci_hcd *xhci; | |
2202 | unsigned int slot_id; | |
2203 | struct xhci_virt_device *virt_dev; | |
2204 | struct xhci_command *reset_device_cmd; | |
2205 | int timeleft; | |
2206 | int last_freed_endpoint; | |
2207 | ||
f0615c45 | 2208 | ret = xhci_check_args(hcd, udev, NULL, 0, false, __func__); |
2a8f82c4 SS |
2209 | if (ret <= 0) |
2210 | return ret; | |
2211 | xhci = hcd_to_xhci(hcd); | |
2212 | slot_id = udev->slot_id; | |
2213 | virt_dev = xhci->devs[slot_id]; | |
f0615c45 AX |
2214 | if (!virt_dev) { |
2215 | xhci_dbg(xhci, "The device to be reset with slot ID %u does " | |
2216 | "not exist. Re-allocate the device\n", slot_id); | |
2217 | ret = xhci_alloc_dev(hcd, udev); | |
2218 | if (ret == 1) | |
2219 | return 0; | |
2220 | else | |
2221 | return -EINVAL; | |
2222 | } | |
2223 | ||
2224 | if (virt_dev->udev != udev) { | |
2225 | /* If the virt_dev and the udev does not match, this virt_dev | |
2226 | * may belong to another udev. | |
2227 | * Re-allocate the device. | |
2228 | */ | |
2229 | xhci_dbg(xhci, "The device to be reset with slot ID %u does " | |
2230 | "not match the udev. Re-allocate the device\n", | |
2231 | slot_id); | |
2232 | ret = xhci_alloc_dev(hcd, udev); | |
2233 | if (ret == 1) | |
2234 | return 0; | |
2235 | else | |
2236 | return -EINVAL; | |
2237 | } | |
2a8f82c4 SS |
2238 | |
2239 | xhci_dbg(xhci, "Resetting device with slot ID %u\n", slot_id); | |
2240 | /* Allocate the command structure that holds the struct completion. | |
2241 | * Assume we're in process context, since the normal device reset | |
2242 | * process has to wait for the device anyway. Storage devices are | |
2243 | * reset as part of error handling, so use GFP_NOIO instead of | |
2244 | * GFP_KERNEL. | |
2245 | */ | |
2246 | reset_device_cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO); | |
2247 | if (!reset_device_cmd) { | |
2248 | xhci_dbg(xhci, "Couldn't allocate command structure.\n"); | |
2249 | return -ENOMEM; | |
2250 | } | |
2251 | ||
2252 | /* Attempt to submit the Reset Device command to the command ring */ | |
2253 | spin_lock_irqsave(&xhci->lock, flags); | |
2254 | reset_device_cmd->command_trb = xhci->cmd_ring->enqueue; | |
7a3783ef PZ |
2255 | |
2256 | /* Enqueue pointer can be left pointing to the link TRB, | |
2257 | * we must handle that | |
2258 | */ | |
2259 | if ((reset_device_cmd->command_trb->link.control & TRB_TYPE_BITMASK) | |
2260 | == TRB_TYPE(TRB_LINK)) | |
2261 | reset_device_cmd->command_trb = | |
2262 | xhci->cmd_ring->enq_seg->next->trbs; | |
2263 | ||
2a8f82c4 SS |
2264 | list_add_tail(&reset_device_cmd->cmd_list, &virt_dev->cmd_list); |
2265 | ret = xhci_queue_reset_device(xhci, slot_id); | |
2266 | if (ret) { | |
2267 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
2268 | list_del(&reset_device_cmd->cmd_list); | |
2269 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2270 | goto command_cleanup; | |
2271 | } | |
2272 | xhci_ring_cmd_db(xhci); | |
2273 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2274 | ||
2275 | /* Wait for the Reset Device command to finish */ | |
2276 | timeleft = wait_for_completion_interruptible_timeout( | |
2277 | reset_device_cmd->completion, | |
2278 | USB_CTRL_SET_TIMEOUT); | |
2279 | if (timeleft <= 0) { | |
2280 | xhci_warn(xhci, "%s while waiting for reset device command\n", | |
2281 | timeleft == 0 ? "Timeout" : "Signal"); | |
2282 | spin_lock_irqsave(&xhci->lock, flags); | |
2283 | /* The timeout might have raced with the event ring handler, so | |
2284 | * only delete from the list if the item isn't poisoned. | |
2285 | */ | |
2286 | if (reset_device_cmd->cmd_list.next != LIST_POISON1) | |
2287 | list_del(&reset_device_cmd->cmd_list); | |
2288 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2289 | ret = -ETIME; | |
2290 | goto command_cleanup; | |
2291 | } | |
2292 | ||
2293 | /* The Reset Device command can't fail, according to the 0.95/0.96 spec, | |
2294 | * unless we tried to reset a slot ID that wasn't enabled, | |
2295 | * or the device wasn't in the addressed or configured state. | |
2296 | */ | |
2297 | ret = reset_device_cmd->status; | |
2298 | switch (ret) { | |
2299 | case COMP_EBADSLT: /* 0.95 completion code for bad slot ID */ | |
2300 | case COMP_CTX_STATE: /* 0.96 completion code for same thing */ | |
2301 | xhci_info(xhci, "Can't reset device (slot ID %u) in %s state\n", | |
2302 | slot_id, | |
2303 | xhci_get_slot_state(xhci, virt_dev->out_ctx)); | |
2304 | xhci_info(xhci, "Not freeing device rings.\n"); | |
2305 | /* Don't treat this as an error. May change my mind later. */ | |
2306 | ret = 0; | |
2307 | goto command_cleanup; | |
2308 | case COMP_SUCCESS: | |
2309 | xhci_dbg(xhci, "Successful reset device command.\n"); | |
2310 | break; | |
2311 | default: | |
2312 | if (xhci_is_vendor_info_code(xhci, ret)) | |
2313 | break; | |
2314 | xhci_warn(xhci, "Unknown completion code %u for " | |
2315 | "reset device command.\n", ret); | |
2316 | ret = -EINVAL; | |
2317 | goto command_cleanup; | |
2318 | } | |
2319 | ||
2320 | /* Everything but endpoint 0 is disabled, so free or cache the rings. */ | |
2321 | last_freed_endpoint = 1; | |
2322 | for (i = 1; i < 31; ++i) { | |
2323 | if (!virt_dev->eps[i].ring) | |
2324 | continue; | |
2325 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); | |
2326 | last_freed_endpoint = i; | |
2327 | } | |
2328 | xhci_dbg(xhci, "Output context after successful reset device cmd:\n"); | |
2329 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, last_freed_endpoint); | |
2330 | ret = 0; | |
2331 | ||
2332 | command_cleanup: | |
2333 | xhci_free_command(xhci, reset_device_cmd); | |
2334 | return ret; | |
2335 | } | |
2336 | ||
3ffbba95 SS |
2337 | /* |
2338 | * At this point, the struct usb_device is about to go away, the device has | |
2339 | * disconnected, and all traffic has been stopped and the endpoints have been | |
2340 | * disabled. Free any HC data structures associated with that device. | |
2341 | */ | |
2342 | void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev) | |
2343 | { | |
2344 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
6f5165cf | 2345 | struct xhci_virt_device *virt_dev; |
3ffbba95 | 2346 | unsigned long flags; |
c526d0d4 | 2347 | u32 state; |
64927730 | 2348 | int i, ret; |
3ffbba95 | 2349 | |
64927730 AX |
2350 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
2351 | if (ret <= 0) | |
3ffbba95 | 2352 | return; |
64927730 | 2353 | |
6f5165cf | 2354 | virt_dev = xhci->devs[udev->slot_id]; |
6f5165cf SS |
2355 | |
2356 | /* Stop any wayward timer functions (which may grab the lock) */ | |
2357 | for (i = 0; i < 31; ++i) { | |
2358 | virt_dev->eps[i].ep_state &= ~EP_HALT_PENDING; | |
2359 | del_timer_sync(&virt_dev->eps[i].stop_cmd_timer); | |
2360 | } | |
3ffbba95 SS |
2361 | |
2362 | spin_lock_irqsave(&xhci->lock, flags); | |
c526d0d4 SS |
2363 | /* Don't disable the slot if the host controller is dead. */ |
2364 | state = xhci_readl(xhci, &xhci->op_regs->status); | |
6f5165cf | 2365 | if (state == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING)) { |
c526d0d4 SS |
2366 | xhci_free_virt_device(xhci, udev->slot_id); |
2367 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2368 | return; | |
2369 | } | |
2370 | ||
23e3be11 | 2371 | if (xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) { |
3ffbba95 SS |
2372 | spin_unlock_irqrestore(&xhci->lock, flags); |
2373 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
2374 | return; | |
2375 | } | |
23e3be11 | 2376 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
2377 | spin_unlock_irqrestore(&xhci->lock, flags); |
2378 | /* | |
2379 | * Event command completion handler will free any data structures | |
f88ba78d | 2380 | * associated with the slot. XXX Can free sleep? |
3ffbba95 SS |
2381 | */ |
2382 | } | |
2383 | ||
2384 | /* | |
2385 | * Returns 0 if the xHC ran out of device slots, the Enable Slot command | |
2386 | * timed out, or allocating memory failed. Returns 1 on success. | |
2387 | */ | |
2388 | int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev) | |
2389 | { | |
2390 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
2391 | unsigned long flags; | |
2392 | int timeleft; | |
2393 | int ret; | |
2394 | ||
2395 | spin_lock_irqsave(&xhci->lock, flags); | |
23e3be11 | 2396 | ret = xhci_queue_slot_control(xhci, TRB_ENABLE_SLOT, 0); |
3ffbba95 SS |
2397 | if (ret) { |
2398 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2399 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
2400 | return 0; | |
2401 | } | |
23e3be11 | 2402 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
2403 | spin_unlock_irqrestore(&xhci->lock, flags); |
2404 | ||
2405 | /* XXX: how much time for xHC slot assignment? */ | |
2406 | timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, | |
2407 | USB_CTRL_SET_TIMEOUT); | |
2408 | if (timeleft <= 0) { | |
2409 | xhci_warn(xhci, "%s while waiting for a slot\n", | |
2410 | timeleft == 0 ? "Timeout" : "Signal"); | |
2411 | /* FIXME cancel the enable slot request */ | |
2412 | return 0; | |
2413 | } | |
2414 | ||
3ffbba95 SS |
2415 | if (!xhci->slot_id) { |
2416 | xhci_err(xhci, "Error while assigning device slot ID\n"); | |
3ffbba95 SS |
2417 | return 0; |
2418 | } | |
a6d940dd SS |
2419 | /* xhci_alloc_virt_device() does not touch rings; no need to lock. |
2420 | * Use GFP_NOIO, since this function can be called from | |
2421 | * xhci_discover_or_reset_device(), which may be called as part of | |
2422 | * mass storage driver error handling. | |
2423 | */ | |
2424 | if (!xhci_alloc_virt_device(xhci, xhci->slot_id, udev, GFP_NOIO)) { | |
3ffbba95 SS |
2425 | /* Disable slot, if we can do it without mem alloc */ |
2426 | xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n"); | |
f88ba78d | 2427 | spin_lock_irqsave(&xhci->lock, flags); |
23e3be11 SS |
2428 | if (!xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) |
2429 | xhci_ring_cmd_db(xhci); | |
3ffbba95 SS |
2430 | spin_unlock_irqrestore(&xhci->lock, flags); |
2431 | return 0; | |
2432 | } | |
2433 | udev->slot_id = xhci->slot_id; | |
2434 | /* Is this a LS or FS device under a HS hub? */ | |
2435 | /* Hub or peripherial? */ | |
3ffbba95 SS |
2436 | return 1; |
2437 | } | |
2438 | ||
2439 | /* | |
2440 | * Issue an Address Device command (which will issue a SetAddress request to | |
2441 | * the device). | |
2442 | * We should be protected by the usb_address0_mutex in khubd's hub_port_init, so | |
2443 | * we should only issue and wait on one address command at the same time. | |
2444 | * | |
2445 | * We add one to the device address issued by the hardware because the USB core | |
2446 | * uses address 1 for the root hubs (even though they're not really devices). | |
2447 | */ | |
2448 | int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) | |
2449 | { | |
2450 | unsigned long flags; | |
2451 | int timeleft; | |
2452 | struct xhci_virt_device *virt_dev; | |
2453 | int ret = 0; | |
2454 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
d115b048 JY |
2455 | struct xhci_slot_ctx *slot_ctx; |
2456 | struct xhci_input_control_ctx *ctrl_ctx; | |
8e595a5d | 2457 | u64 temp_64; |
3ffbba95 SS |
2458 | |
2459 | if (!udev->slot_id) { | |
2460 | xhci_dbg(xhci, "Bad Slot ID %d\n", udev->slot_id); | |
2461 | return -EINVAL; | |
2462 | } | |
2463 | ||
3ffbba95 SS |
2464 | virt_dev = xhci->devs[udev->slot_id]; |
2465 | ||
f0615c45 AX |
2466 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
2467 | /* | |
2468 | * If this is the first Set Address since device plug-in or | |
2469 | * virt_device realloaction after a resume with an xHCI power loss, | |
2470 | * then set up the slot context. | |
2471 | */ | |
2472 | if (!slot_ctx->dev_info) | |
3ffbba95 | 2473 | xhci_setup_addressable_virt_dev(xhci, udev); |
f0615c45 | 2474 | /* Otherwise, update the control endpoint ring enqueue pointer. */ |
2d1ee590 SS |
2475 | else |
2476 | xhci_copy_ep0_dequeue_into_input_ctx(xhci, udev); | |
66e49d87 | 2477 | xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); |
d115b048 | 2478 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); |
3ffbba95 | 2479 | |
f88ba78d | 2480 | spin_lock_irqsave(&xhci->lock, flags); |
d115b048 JY |
2481 | ret = xhci_queue_address_device(xhci, virt_dev->in_ctx->dma, |
2482 | udev->slot_id); | |
3ffbba95 SS |
2483 | if (ret) { |
2484 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2485 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
2486 | return ret; | |
2487 | } | |
23e3be11 | 2488 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
2489 | spin_unlock_irqrestore(&xhci->lock, flags); |
2490 | ||
2491 | /* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */ | |
2492 | timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, | |
2493 | USB_CTRL_SET_TIMEOUT); | |
2494 | /* FIXME: From section 4.3.4: "Software shall be responsible for timing | |
2495 | * the SetAddress() "recovery interval" required by USB and aborting the | |
2496 | * command on a timeout. | |
2497 | */ | |
2498 | if (timeleft <= 0) { | |
2499 | xhci_warn(xhci, "%s while waiting for a slot\n", | |
2500 | timeleft == 0 ? "Timeout" : "Signal"); | |
2501 | /* FIXME cancel the address device command */ | |
2502 | return -ETIME; | |
2503 | } | |
2504 | ||
3ffbba95 SS |
2505 | switch (virt_dev->cmd_status) { |
2506 | case COMP_CTX_STATE: | |
2507 | case COMP_EBADSLT: | |
2508 | xhci_err(xhci, "Setup ERROR: address device command for slot %d.\n", | |
2509 | udev->slot_id); | |
2510 | ret = -EINVAL; | |
2511 | break; | |
2512 | case COMP_TX_ERR: | |
2513 | dev_warn(&udev->dev, "Device not responding to set address.\n"); | |
2514 | ret = -EPROTO; | |
2515 | break; | |
2516 | case COMP_SUCCESS: | |
2517 | xhci_dbg(xhci, "Successful Address Device command\n"); | |
2518 | break; | |
2519 | default: | |
2520 | xhci_err(xhci, "ERROR: unexpected command completion " | |
2521 | "code 0x%x.\n", virt_dev->cmd_status); | |
66e49d87 | 2522 | xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); |
d115b048 | 2523 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); |
3ffbba95 SS |
2524 | ret = -EINVAL; |
2525 | break; | |
2526 | } | |
2527 | if (ret) { | |
3ffbba95 SS |
2528 | return ret; |
2529 | } | |
8e595a5d SS |
2530 | temp_64 = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); |
2531 | xhci_dbg(xhci, "Op regs DCBAA ptr = %#016llx\n", temp_64); | |
2532 | xhci_dbg(xhci, "Slot ID %d dcbaa entry @%p = %#016llx\n", | |
3ffbba95 | 2533 | udev->slot_id, |
8e595a5d SS |
2534 | &xhci->dcbaa->dev_context_ptrs[udev->slot_id], |
2535 | (unsigned long long) | |
2536 | xhci->dcbaa->dev_context_ptrs[udev->slot_id]); | |
700e2052 | 2537 | xhci_dbg(xhci, "Output Context DMA address = %#08llx\n", |
d115b048 | 2538 | (unsigned long long)virt_dev->out_ctx->dma); |
3ffbba95 | 2539 | xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); |
d115b048 | 2540 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); |
3ffbba95 | 2541 | xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); |
d115b048 | 2542 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); |
3ffbba95 SS |
2543 | /* |
2544 | * USB core uses address 1 for the roothubs, so we add one to the | |
2545 | * address given back to us by the HC. | |
2546 | */ | |
d115b048 | 2547 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); |
c8d4af8e AX |
2548 | /* Use kernel assigned address for devices; store xHC assigned |
2549 | * address locally. */ | |
2550 | virt_dev->address = (slot_ctx->dev_state & DEV_ADDR_MASK) + 1; | |
f94e0186 | 2551 | /* Zero the input context control for later use */ |
d115b048 JY |
2552 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
2553 | ctrl_ctx->add_flags = 0; | |
2554 | ctrl_ctx->drop_flags = 0; | |
3ffbba95 | 2555 | |
c8d4af8e | 2556 | xhci_dbg(xhci, "Internal device address = %d\n", virt_dev->address); |
3ffbba95 SS |
2557 | |
2558 | return 0; | |
2559 | } | |
2560 | ||
ac1c1b7f SS |
2561 | /* Once a hub descriptor is fetched for a device, we need to update the xHC's |
2562 | * internal data structures for the device. | |
2563 | */ | |
2564 | int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev, | |
2565 | struct usb_tt *tt, gfp_t mem_flags) | |
2566 | { | |
2567 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
2568 | struct xhci_virt_device *vdev; | |
2569 | struct xhci_command *config_cmd; | |
2570 | struct xhci_input_control_ctx *ctrl_ctx; | |
2571 | struct xhci_slot_ctx *slot_ctx; | |
2572 | unsigned long flags; | |
2573 | unsigned think_time; | |
2574 | int ret; | |
2575 | ||
2576 | /* Ignore root hubs */ | |
2577 | if (!hdev->parent) | |
2578 | return 0; | |
2579 | ||
2580 | vdev = xhci->devs[hdev->slot_id]; | |
2581 | if (!vdev) { | |
2582 | xhci_warn(xhci, "Cannot update hub desc for unknown device.\n"); | |
2583 | return -EINVAL; | |
2584 | } | |
a1d78c16 | 2585 | config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); |
ac1c1b7f SS |
2586 | if (!config_cmd) { |
2587 | xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); | |
2588 | return -ENOMEM; | |
2589 | } | |
2590 | ||
2591 | spin_lock_irqsave(&xhci->lock, flags); | |
2592 | xhci_slot_copy(xhci, config_cmd->in_ctx, vdev->out_ctx); | |
2593 | ctrl_ctx = xhci_get_input_control_ctx(xhci, config_cmd->in_ctx); | |
2594 | ctrl_ctx->add_flags |= SLOT_FLAG; | |
2595 | slot_ctx = xhci_get_slot_ctx(xhci, config_cmd->in_ctx); | |
2596 | slot_ctx->dev_info |= DEV_HUB; | |
2597 | if (tt->multi) | |
2598 | slot_ctx->dev_info |= DEV_MTT; | |
2599 | if (xhci->hci_version > 0x95) { | |
2600 | xhci_dbg(xhci, "xHCI version %x needs hub " | |
2601 | "TT think time and number of ports\n", | |
2602 | (unsigned int) xhci->hci_version); | |
2603 | slot_ctx->dev_info2 |= XHCI_MAX_PORTS(hdev->maxchild); | |
2604 | /* Set TT think time - convert from ns to FS bit times. | |
2605 | * 0 = 8 FS bit times, 1 = 16 FS bit times, | |
2606 | * 2 = 24 FS bit times, 3 = 32 FS bit times. | |
2607 | */ | |
2608 | think_time = tt->think_time; | |
2609 | if (think_time != 0) | |
2610 | think_time = (think_time / 666) - 1; | |
2611 | slot_ctx->tt_info |= TT_THINK_TIME(think_time); | |
2612 | } else { | |
2613 | xhci_dbg(xhci, "xHCI version %x doesn't need hub " | |
2614 | "TT think time or number of ports\n", | |
2615 | (unsigned int) xhci->hci_version); | |
2616 | } | |
2617 | slot_ctx->dev_state = 0; | |
2618 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2619 | ||
2620 | xhci_dbg(xhci, "Set up %s for hub device.\n", | |
2621 | (xhci->hci_version > 0x95) ? | |
2622 | "configure endpoint" : "evaluate context"); | |
2623 | xhci_dbg(xhci, "Slot %u Input Context:\n", hdev->slot_id); | |
2624 | xhci_dbg_ctx(xhci, config_cmd->in_ctx, 0); | |
2625 | ||
2626 | /* Issue and wait for the configure endpoint or | |
2627 | * evaluate context command. | |
2628 | */ | |
2629 | if (xhci->hci_version > 0x95) | |
2630 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, | |
2631 | false, false); | |
2632 | else | |
2633 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, | |
2634 | true, false); | |
2635 | ||
2636 | xhci_dbg(xhci, "Slot %u Output Context:\n", hdev->slot_id); | |
2637 | xhci_dbg_ctx(xhci, vdev->out_ctx, 0); | |
2638 | ||
2639 | xhci_free_command(xhci, config_cmd); | |
2640 | return ret; | |
2641 | } | |
2642 | ||
66d4eadd SS |
2643 | int xhci_get_frame(struct usb_hcd *hcd) |
2644 | { | |
2645 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
2646 | /* EHCI mods by the periodic size. Why? */ | |
2647 | return xhci_readl(xhci, &xhci->run_regs->microframe_index) >> 3; | |
2648 | } | |
2649 | ||
2650 | MODULE_DESCRIPTION(DRIVER_DESC); | |
2651 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
2652 | MODULE_LICENSE("GPL"); | |
2653 | ||
2654 | static int __init xhci_hcd_init(void) | |
2655 | { | |
2656 | #ifdef CONFIG_PCI | |
2657 | int retval = 0; | |
2658 | ||
2659 | retval = xhci_register_pci(); | |
2660 | ||
2661 | if (retval < 0) { | |
2662 | printk(KERN_DEBUG "Problem registering PCI driver."); | |
2663 | return retval; | |
2664 | } | |
2665 | #endif | |
98441973 SS |
2666 | /* |
2667 | * Check the compiler generated sizes of structures that must be laid | |
2668 | * out in specific ways for hardware access. | |
2669 | */ | |
2670 | BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8); | |
2671 | BUILD_BUG_ON(sizeof(struct xhci_slot_ctx) != 8*32/8); | |
2672 | BUILD_BUG_ON(sizeof(struct xhci_ep_ctx) != 8*32/8); | |
2673 | /* xhci_device_control has eight fields, and also | |
2674 | * embeds one xhci_slot_ctx and 31 xhci_ep_ctx | |
2675 | */ | |
98441973 SS |
2676 | BUILD_BUG_ON(sizeof(struct xhci_stream_ctx) != 4*32/8); |
2677 | BUILD_BUG_ON(sizeof(union xhci_trb) != 4*32/8); | |
2678 | BUILD_BUG_ON(sizeof(struct xhci_erst_entry) != 4*32/8); | |
2679 | BUILD_BUG_ON(sizeof(struct xhci_cap_regs) != 7*32/8); | |
2680 | BUILD_BUG_ON(sizeof(struct xhci_intr_reg) != 8*32/8); | |
2681 | /* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */ | |
2682 | BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8); | |
2683 | BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8); | |
66d4eadd SS |
2684 | return 0; |
2685 | } | |
2686 | module_init(xhci_hcd_init); | |
2687 | ||
2688 | static void __exit xhci_hcd_cleanup(void) | |
2689 | { | |
2690 | #ifdef CONFIG_PCI | |
2691 | xhci_unregister_pci(); | |
2692 | #endif | |
2693 | } | |
2694 | module_exit(xhci_hcd_cleanup); |