Commit | Line | Data |
---|---|---|
66d4eadd SS |
1 | /* |
2 | * xHCI host controller driver | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp. | |
5 | * | |
6 | * Author: Sarah Sharp | |
7 | * Some code borrowed from the Linux EHCI driver. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | * for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software Foundation, | |
20 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
43b86af8 | 23 | #include <linux/pci.h> |
66d4eadd | 24 | #include <linux/irq.h> |
8df75f42 | 25 | #include <linux/log2.h> |
66d4eadd | 26 | #include <linux/module.h> |
b0567b3f | 27 | #include <linux/moduleparam.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
66d4eadd SS |
29 | |
30 | #include "xhci.h" | |
31 | ||
32 | #define DRIVER_AUTHOR "Sarah Sharp" | |
33 | #define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver" | |
34 | ||
b0567b3f SS |
35 | /* Some 0.95 hardware can't handle the chain bit on a Link TRB being cleared */ |
36 | static int link_quirk; | |
37 | module_param(link_quirk, int, S_IRUGO | S_IWUSR); | |
38 | MODULE_PARM_DESC(link_quirk, "Don't clear the chain bit on a link TRB"); | |
39 | ||
66d4eadd SS |
40 | /* TODO: copied from ehci-hcd.c - can this be refactored? */ |
41 | /* | |
42 | * handshake - spin reading hc until handshake completes or fails | |
43 | * @ptr: address of hc register to be read | |
44 | * @mask: bits to look at in result of read | |
45 | * @done: value of those bits when handshake succeeds | |
46 | * @usec: timeout in microseconds | |
47 | * | |
48 | * Returns negative errno, or zero on success | |
49 | * | |
50 | * Success happens when the "mask" bits have the specified value (hardware | |
51 | * handshake done). There are two failure modes: "usec" have passed (major | |
52 | * hardware flakeout), or the register reads as all-ones (hardware removed). | |
53 | */ | |
54 | static int handshake(struct xhci_hcd *xhci, void __iomem *ptr, | |
55 | u32 mask, u32 done, int usec) | |
56 | { | |
57 | u32 result; | |
58 | ||
59 | do { | |
60 | result = xhci_readl(xhci, ptr); | |
61 | if (result == ~(u32)0) /* card removed */ | |
62 | return -ENODEV; | |
63 | result &= mask; | |
64 | if (result == done) | |
65 | return 0; | |
66 | udelay(1); | |
67 | usec--; | |
68 | } while (usec > 0); | |
69 | return -ETIMEDOUT; | |
70 | } | |
71 | ||
72 | /* | |
4f0f0bae | 73 | * Disable interrupts and begin the xHCI halting process. |
66d4eadd | 74 | */ |
4f0f0bae | 75 | void xhci_quiesce(struct xhci_hcd *xhci) |
66d4eadd SS |
76 | { |
77 | u32 halted; | |
78 | u32 cmd; | |
79 | u32 mask; | |
80 | ||
66d4eadd SS |
81 | mask = ~(XHCI_IRQS); |
82 | halted = xhci_readl(xhci, &xhci->op_regs->status) & STS_HALT; | |
83 | if (!halted) | |
84 | mask &= ~CMD_RUN; | |
85 | ||
86 | cmd = xhci_readl(xhci, &xhci->op_regs->command); | |
87 | cmd &= mask; | |
88 | xhci_writel(xhci, cmd, &xhci->op_regs->command); | |
4f0f0bae SS |
89 | } |
90 | ||
91 | /* | |
92 | * Force HC into halt state. | |
93 | * | |
94 | * Disable any IRQs and clear the run/stop bit. | |
95 | * HC will complete any current and actively pipelined transactions, and | |
bdfca502 | 96 | * should halt within 16 ms of the run/stop bit being cleared. |
4f0f0bae | 97 | * Read HC Halted bit in the status register to see when the HC is finished. |
4f0f0bae SS |
98 | */ |
99 | int xhci_halt(struct xhci_hcd *xhci) | |
100 | { | |
c6cc27c7 | 101 | int ret; |
4f0f0bae SS |
102 | xhci_dbg(xhci, "// Halt the HC\n"); |
103 | xhci_quiesce(xhci); | |
66d4eadd | 104 | |
c6cc27c7 | 105 | ret = handshake(xhci, &xhci->op_regs->status, |
66d4eadd | 106 | STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC); |
c6cc27c7 SS |
107 | if (!ret) |
108 | xhci->xhc_state |= XHCI_STATE_HALTED; | |
5af98bb0 SS |
109 | else |
110 | xhci_warn(xhci, "Host not halted after %u microseconds.\n", | |
111 | XHCI_MAX_HALT_USEC); | |
c6cc27c7 | 112 | return ret; |
66d4eadd SS |
113 | } |
114 | ||
ed07453f SS |
115 | /* |
116 | * Set the run bit and wait for the host to be running. | |
117 | */ | |
8212a49d | 118 | static int xhci_start(struct xhci_hcd *xhci) |
ed07453f SS |
119 | { |
120 | u32 temp; | |
121 | int ret; | |
122 | ||
123 | temp = xhci_readl(xhci, &xhci->op_regs->command); | |
124 | temp |= (CMD_RUN); | |
125 | xhci_dbg(xhci, "// Turn on HC, cmd = 0x%x.\n", | |
126 | temp); | |
127 | xhci_writel(xhci, temp, &xhci->op_regs->command); | |
128 | ||
129 | /* | |
130 | * Wait for the HCHalted Status bit to be 0 to indicate the host is | |
131 | * running. | |
132 | */ | |
133 | ret = handshake(xhci, &xhci->op_regs->status, | |
134 | STS_HALT, 0, XHCI_MAX_HALT_USEC); | |
135 | if (ret == -ETIMEDOUT) | |
136 | xhci_err(xhci, "Host took too long to start, " | |
137 | "waited %u microseconds.\n", | |
138 | XHCI_MAX_HALT_USEC); | |
c6cc27c7 SS |
139 | if (!ret) |
140 | xhci->xhc_state &= ~XHCI_STATE_HALTED; | |
ed07453f SS |
141 | return ret; |
142 | } | |
143 | ||
66d4eadd | 144 | /* |
ac04e6ff | 145 | * Reset a halted HC. |
66d4eadd SS |
146 | * |
147 | * This resets pipelines, timers, counters, state machines, etc. | |
148 | * Transactions will be terminated immediately, and operational registers | |
149 | * will be set to their defaults. | |
150 | */ | |
151 | int xhci_reset(struct xhci_hcd *xhci) | |
152 | { | |
153 | u32 command; | |
154 | u32 state; | |
f370b996 | 155 | int ret, i; |
66d4eadd SS |
156 | |
157 | state = xhci_readl(xhci, &xhci->op_regs->status); | |
d3512f63 SS |
158 | if ((state & STS_HALT) == 0) { |
159 | xhci_warn(xhci, "Host controller not halted, aborting reset.\n"); | |
160 | return 0; | |
161 | } | |
66d4eadd SS |
162 | |
163 | xhci_dbg(xhci, "// Reset the HC\n"); | |
164 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
165 | command |= CMD_RESET; | |
166 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
66d4eadd | 167 | |
2d62f3ee | 168 | ret = handshake(xhci, &xhci->op_regs->command, |
22ceac19 | 169 | CMD_RESET, 0, 10 * 1000 * 1000); |
2d62f3ee SS |
170 | if (ret) |
171 | return ret; | |
172 | ||
173 | xhci_dbg(xhci, "Wait for controller to be ready for doorbell rings\n"); | |
174 | /* | |
175 | * xHCI cannot write to any doorbells or operational registers other | |
176 | * than status until the "Controller Not Ready" flag is cleared. | |
177 | */ | |
22ceac19 SS |
178 | ret = handshake(xhci, &xhci->op_regs->status, |
179 | STS_CNR, 0, 10 * 1000 * 1000); | |
f370b996 AX |
180 | |
181 | for (i = 0; i < 2; ++i) { | |
182 | xhci->bus_state[i].port_c_suspend = 0; | |
183 | xhci->bus_state[i].suspended_ports = 0; | |
184 | xhci->bus_state[i].resuming_ports = 0; | |
185 | } | |
186 | ||
187 | return ret; | |
66d4eadd SS |
188 | } |
189 | ||
421aa841 SAS |
190 | #ifdef CONFIG_PCI |
191 | static int xhci_free_msi(struct xhci_hcd *xhci) | |
43b86af8 DN |
192 | { |
193 | int i; | |
43b86af8 | 194 | |
421aa841 SAS |
195 | if (!xhci->msix_entries) |
196 | return -EINVAL; | |
43b86af8 | 197 | |
421aa841 SAS |
198 | for (i = 0; i < xhci->msix_count; i++) |
199 | if (xhci->msix_entries[i].vector) | |
200 | free_irq(xhci->msix_entries[i].vector, | |
201 | xhci_to_hcd(xhci)); | |
202 | return 0; | |
43b86af8 DN |
203 | } |
204 | ||
205 | /* | |
206 | * Set up MSI | |
207 | */ | |
208 | static int xhci_setup_msi(struct xhci_hcd *xhci) | |
66d4eadd SS |
209 | { |
210 | int ret; | |
43b86af8 DN |
211 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
212 | ||
213 | ret = pci_enable_msi(pdev); | |
214 | if (ret) { | |
3b9783b2 | 215 | xhci_dbg(xhci, "failed to allocate MSI entry\n"); |
43b86af8 DN |
216 | return ret; |
217 | } | |
218 | ||
219 | ret = request_irq(pdev->irq, (irq_handler_t)xhci_msi_irq, | |
220 | 0, "xhci_hcd", xhci_to_hcd(xhci)); | |
221 | if (ret) { | |
3b9783b2 | 222 | xhci_dbg(xhci, "disable MSI interrupt\n"); |
43b86af8 DN |
223 | pci_disable_msi(pdev); |
224 | } | |
225 | ||
226 | return ret; | |
227 | } | |
228 | ||
421aa841 SAS |
229 | /* |
230 | * Free IRQs | |
231 | * free all IRQs request | |
232 | */ | |
233 | static void xhci_free_irq(struct xhci_hcd *xhci) | |
234 | { | |
235 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); | |
236 | int ret; | |
237 | ||
238 | /* return if using legacy interrupt */ | |
cd70469d | 239 | if (xhci_to_hcd(xhci)->irq > 0) |
421aa841 SAS |
240 | return; |
241 | ||
242 | ret = xhci_free_msi(xhci); | |
243 | if (!ret) | |
244 | return; | |
cd70469d | 245 | if (pdev->irq > 0) |
421aa841 SAS |
246 | free_irq(pdev->irq, xhci_to_hcd(xhci)); |
247 | ||
248 | return; | |
249 | } | |
250 | ||
43b86af8 DN |
251 | /* |
252 | * Set up MSI-X | |
253 | */ | |
254 | static int xhci_setup_msix(struct xhci_hcd *xhci) | |
255 | { | |
256 | int i, ret = 0; | |
0029227f AX |
257 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
258 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
66d4eadd | 259 | |
43b86af8 DN |
260 | /* |
261 | * calculate number of msi-x vectors supported. | |
262 | * - HCS_MAX_INTRS: the max number of interrupts the host can handle, | |
263 | * with max number of interrupters based on the xhci HCSPARAMS1. | |
264 | * - num_online_cpus: maximum msi-x vectors per CPUs core. | |
265 | * Add additional 1 vector to ensure always available interrupt. | |
266 | */ | |
267 | xhci->msix_count = min(num_online_cpus() + 1, | |
268 | HCS_MAX_INTRS(xhci->hcs_params1)); | |
269 | ||
270 | xhci->msix_entries = | |
271 | kmalloc((sizeof(struct msix_entry))*xhci->msix_count, | |
86871975 | 272 | GFP_KERNEL); |
66d4eadd SS |
273 | if (!xhci->msix_entries) { |
274 | xhci_err(xhci, "Failed to allocate MSI-X entries\n"); | |
275 | return -ENOMEM; | |
276 | } | |
43b86af8 DN |
277 | |
278 | for (i = 0; i < xhci->msix_count; i++) { | |
279 | xhci->msix_entries[i].entry = i; | |
280 | xhci->msix_entries[i].vector = 0; | |
281 | } | |
66d4eadd SS |
282 | |
283 | ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count); | |
284 | if (ret) { | |
3b9783b2 | 285 | xhci_dbg(xhci, "Failed to enable MSI-X\n"); |
66d4eadd SS |
286 | goto free_entries; |
287 | } | |
288 | ||
43b86af8 DN |
289 | for (i = 0; i < xhci->msix_count; i++) { |
290 | ret = request_irq(xhci->msix_entries[i].vector, | |
291 | (irq_handler_t)xhci_msi_irq, | |
292 | 0, "xhci_hcd", xhci_to_hcd(xhci)); | |
293 | if (ret) | |
294 | goto disable_msix; | |
66d4eadd | 295 | } |
43b86af8 | 296 | |
0029227f | 297 | hcd->msix_enabled = 1; |
43b86af8 | 298 | return ret; |
66d4eadd SS |
299 | |
300 | disable_msix: | |
3b9783b2 | 301 | xhci_dbg(xhci, "disable MSI-X interrupt\n"); |
43b86af8 | 302 | xhci_free_irq(xhci); |
66d4eadd SS |
303 | pci_disable_msix(pdev); |
304 | free_entries: | |
305 | kfree(xhci->msix_entries); | |
306 | xhci->msix_entries = NULL; | |
307 | return ret; | |
308 | } | |
309 | ||
66d4eadd SS |
310 | /* Free any IRQs and disable MSI-X */ |
311 | static void xhci_cleanup_msix(struct xhci_hcd *xhci) | |
312 | { | |
0029227f AX |
313 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
314 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
66d4eadd | 315 | |
43b86af8 DN |
316 | xhci_free_irq(xhci); |
317 | ||
318 | if (xhci->msix_entries) { | |
319 | pci_disable_msix(pdev); | |
320 | kfree(xhci->msix_entries); | |
321 | xhci->msix_entries = NULL; | |
322 | } else { | |
323 | pci_disable_msi(pdev); | |
324 | } | |
325 | ||
0029227f | 326 | hcd->msix_enabled = 0; |
43b86af8 | 327 | return; |
66d4eadd | 328 | } |
66d4eadd | 329 | |
421aa841 SAS |
330 | static void xhci_msix_sync_irqs(struct xhci_hcd *xhci) |
331 | { | |
332 | int i; | |
333 | ||
334 | if (xhci->msix_entries) { | |
335 | for (i = 0; i < xhci->msix_count; i++) | |
336 | synchronize_irq(xhci->msix_entries[i].vector); | |
337 | } | |
338 | } | |
339 | ||
340 | static int xhci_try_enable_msi(struct usb_hcd *hcd) | |
341 | { | |
342 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
343 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); | |
344 | int ret; | |
345 | ||
346 | /* | |
347 | * Some Fresco Logic host controllers advertise MSI, but fail to | |
348 | * generate interrupts. Don't even try to enable MSI. | |
349 | */ | |
350 | if (xhci->quirks & XHCI_BROKEN_MSI) | |
351 | return 0; | |
352 | ||
353 | /* unregister the legacy interrupt */ | |
354 | if (hcd->irq) | |
355 | free_irq(hcd->irq, hcd); | |
cd70469d | 356 | hcd->irq = 0; |
421aa841 SAS |
357 | |
358 | ret = xhci_setup_msix(xhci); | |
359 | if (ret) | |
360 | /* fall back to msi*/ | |
361 | ret = xhci_setup_msi(xhci); | |
362 | ||
363 | if (!ret) | |
cd70469d | 364 | /* hcd->irq is 0, we have MSI */ |
421aa841 SAS |
365 | return 0; |
366 | ||
68d07f64 SS |
367 | if (!pdev->irq) { |
368 | xhci_err(xhci, "No msi-x/msi found and no IRQ in BIOS\n"); | |
369 | return -EINVAL; | |
370 | } | |
371 | ||
421aa841 SAS |
372 | /* fall back to legacy interrupt*/ |
373 | ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED, | |
374 | hcd->irq_descr, hcd); | |
375 | if (ret) { | |
376 | xhci_err(xhci, "request interrupt %d failed\n", | |
377 | pdev->irq); | |
378 | return ret; | |
379 | } | |
380 | hcd->irq = pdev->irq; | |
381 | return 0; | |
382 | } | |
383 | ||
384 | #else | |
385 | ||
386 | static int xhci_try_enable_msi(struct usb_hcd *hcd) | |
387 | { | |
388 | return 0; | |
389 | } | |
390 | ||
391 | static void xhci_cleanup_msix(struct xhci_hcd *xhci) | |
392 | { | |
393 | } | |
394 | ||
395 | static void xhci_msix_sync_irqs(struct xhci_hcd *xhci) | |
396 | { | |
397 | } | |
398 | ||
399 | #endif | |
400 | ||
66d4eadd SS |
401 | /* |
402 | * Initialize memory for HCD and xHC (one-time init). | |
403 | * | |
404 | * Program the PAGESIZE register, initialize the device context array, create | |
405 | * device contexts (?), set up a command ring segment (or two?), create event | |
406 | * ring (one for now). | |
407 | */ | |
408 | int xhci_init(struct usb_hcd *hcd) | |
409 | { | |
410 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
411 | int retval = 0; | |
412 | ||
413 | xhci_dbg(xhci, "xhci_init\n"); | |
414 | spin_lock_init(&xhci->lock); | |
d7826599 | 415 | if (xhci->hci_version == 0x95 && link_quirk) { |
b0567b3f SS |
416 | xhci_dbg(xhci, "QUIRK: Not clearing Link TRB chain bits.\n"); |
417 | xhci->quirks |= XHCI_LINK_TRB_QUIRK; | |
418 | } else { | |
ac9d8fe7 | 419 | xhci_dbg(xhci, "xHCI doesn't need link TRB QUIRK\n"); |
b0567b3f | 420 | } |
66d4eadd SS |
421 | retval = xhci_mem_init(xhci, GFP_KERNEL); |
422 | xhci_dbg(xhci, "Finished xhci_init\n"); | |
423 | ||
424 | return retval; | |
425 | } | |
426 | ||
7f84eef0 SS |
427 | /*-------------------------------------------------------------------------*/ |
428 | ||
7f84eef0 SS |
429 | |
430 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING | |
8212a49d | 431 | static void xhci_event_ring_work(unsigned long arg) |
7f84eef0 SS |
432 | { |
433 | unsigned long flags; | |
434 | int temp; | |
8e595a5d | 435 | u64 temp_64; |
7f84eef0 SS |
436 | struct xhci_hcd *xhci = (struct xhci_hcd *) arg; |
437 | int i, j; | |
438 | ||
439 | xhci_dbg(xhci, "Poll event ring: %lu\n", jiffies); | |
440 | ||
441 | spin_lock_irqsave(&xhci->lock, flags); | |
442 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
443 | xhci_dbg(xhci, "op reg status = 0x%x\n", temp); | |
7bd89b40 SS |
444 | if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING) || |
445 | (xhci->xhc_state & XHCI_STATE_HALTED)) { | |
e4ab05df SS |
446 | xhci_dbg(xhci, "HW died, polling stopped.\n"); |
447 | spin_unlock_irqrestore(&xhci->lock, flags); | |
448 | return; | |
449 | } | |
450 | ||
7f84eef0 SS |
451 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); |
452 | xhci_dbg(xhci, "ir_set 0 pending = 0x%x\n", temp); | |
7f84eef0 SS |
453 | xhci_dbg(xhci, "HC error bitmask = 0x%x\n", xhci->error_bitmask); |
454 | xhci->error_bitmask = 0; | |
455 | xhci_dbg(xhci, "Event ring:\n"); | |
456 | xhci_debug_segment(xhci, xhci->event_ring->deq_seg); | |
457 | xhci_dbg_ring_ptrs(xhci, xhci->event_ring); | |
8e595a5d SS |
458 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); |
459 | temp_64 &= ~ERST_PTR_MASK; | |
460 | xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); | |
7f84eef0 SS |
461 | xhci_dbg(xhci, "Command ring:\n"); |
462 | xhci_debug_segment(xhci, xhci->cmd_ring->deq_seg); | |
463 | xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); | |
464 | xhci_dbg_cmd_ptrs(xhci); | |
3ffbba95 | 465 | for (i = 0; i < MAX_HC_SLOTS; ++i) { |
63a0d9ab SS |
466 | if (!xhci->devs[i]) |
467 | continue; | |
468 | for (j = 0; j < 31; ++j) { | |
e9df17eb | 469 | xhci_dbg_ep_rings(xhci, i, j, &xhci->devs[i]->eps[j]); |
3ffbba95 SS |
470 | } |
471 | } | |
7f84eef0 SS |
472 | spin_unlock_irqrestore(&xhci->lock, flags); |
473 | ||
474 | if (!xhci->zombie) | |
475 | mod_timer(&xhci->event_ring_timer, jiffies + POLL_TIMEOUT * HZ); | |
476 | else | |
477 | xhci_dbg(xhci, "Quit polling the event ring.\n"); | |
478 | } | |
479 | #endif | |
480 | ||
f6ff0ac8 SS |
481 | static int xhci_run_finished(struct xhci_hcd *xhci) |
482 | { | |
483 | if (xhci_start(xhci)) { | |
484 | xhci_halt(xhci); | |
485 | return -ENODEV; | |
486 | } | |
487 | xhci->shared_hcd->state = HC_STATE_RUNNING; | |
488 | ||
489 | if (xhci->quirks & XHCI_NEC_HOST) | |
490 | xhci_ring_cmd_db(xhci); | |
491 | ||
492 | xhci_dbg(xhci, "Finished xhci_run for USB3 roothub\n"); | |
493 | return 0; | |
494 | } | |
495 | ||
66d4eadd SS |
496 | /* |
497 | * Start the HC after it was halted. | |
498 | * | |
499 | * This function is called by the USB core when the HC driver is added. | |
500 | * Its opposite is xhci_stop(). | |
501 | * | |
502 | * xhci_init() must be called once before this function can be called. | |
503 | * Reset the HC, enable device slot contexts, program DCBAAP, and | |
504 | * set command ring pointer and event ring pointer. | |
505 | * | |
506 | * Setup MSI-X vectors and enable interrupts. | |
507 | */ | |
508 | int xhci_run(struct usb_hcd *hcd) | |
509 | { | |
510 | u32 temp; | |
8e595a5d | 511 | u64 temp_64; |
3fd1ec58 | 512 | int ret; |
66d4eadd | 513 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
66d4eadd | 514 | |
f6ff0ac8 SS |
515 | /* Start the xHCI host controller running only after the USB 2.0 roothub |
516 | * is setup. | |
517 | */ | |
66d4eadd | 518 | |
0f2a7930 | 519 | hcd->uses_new_polling = 1; |
f6ff0ac8 SS |
520 | if (!usb_hcd_is_primary_hcd(hcd)) |
521 | return xhci_run_finished(xhci); | |
0f2a7930 | 522 | |
7f84eef0 | 523 | xhci_dbg(xhci, "xhci_run\n"); |
43b86af8 | 524 | |
3fd1ec58 | 525 | ret = xhci_try_enable_msi(hcd); |
43b86af8 | 526 | if (ret) |
3fd1ec58 | 527 | return ret; |
66d4eadd | 528 | |
7f84eef0 SS |
529 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
530 | init_timer(&xhci->event_ring_timer); | |
531 | xhci->event_ring_timer.data = (unsigned long) xhci; | |
23e3be11 | 532 | xhci->event_ring_timer.function = xhci_event_ring_work; |
7f84eef0 SS |
533 | /* Poll the event ring */ |
534 | xhci->event_ring_timer.expires = jiffies + POLL_TIMEOUT * HZ; | |
535 | xhci->zombie = 0; | |
536 | xhci_dbg(xhci, "Setting event ring polling timer\n"); | |
537 | add_timer(&xhci->event_ring_timer); | |
538 | #endif | |
539 | ||
66e49d87 SS |
540 | xhci_dbg(xhci, "Command ring memory map follows:\n"); |
541 | xhci_debug_ring(xhci, xhci->cmd_ring); | |
542 | xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring); | |
543 | xhci_dbg_cmd_ptrs(xhci); | |
544 | ||
545 | xhci_dbg(xhci, "ERST memory map follows:\n"); | |
546 | xhci_dbg_erst(xhci, &xhci->erst); | |
547 | xhci_dbg(xhci, "Event ring:\n"); | |
548 | xhci_debug_ring(xhci, xhci->event_ring); | |
549 | xhci_dbg_ring_ptrs(xhci, xhci->event_ring); | |
550 | temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); | |
551 | temp_64 &= ~ERST_PTR_MASK; | |
552 | xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64); | |
553 | ||
66d4eadd SS |
554 | xhci_dbg(xhci, "// Set the interrupt modulation register\n"); |
555 | temp = xhci_readl(xhci, &xhci->ir_set->irq_control); | |
a4d88302 | 556 | temp &= ~ER_IRQ_INTERVAL_MASK; |
66d4eadd SS |
557 | temp |= (u32) 160; |
558 | xhci_writel(xhci, temp, &xhci->ir_set->irq_control); | |
559 | ||
560 | /* Set the HCD state before we enable the irqs */ | |
66d4eadd SS |
561 | temp = xhci_readl(xhci, &xhci->op_regs->command); |
562 | temp |= (CMD_EIE); | |
563 | xhci_dbg(xhci, "// Enable interrupts, cmd = 0x%x.\n", | |
564 | temp); | |
565 | xhci_writel(xhci, temp, &xhci->op_regs->command); | |
566 | ||
567 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
700e2052 GKH |
568 | xhci_dbg(xhci, "// Enabling event ring interrupter %p by writing 0x%x to irq_pending\n", |
569 | xhci->ir_set, (unsigned int) ER_IRQ_ENABLE(temp)); | |
66d4eadd SS |
570 | xhci_writel(xhci, ER_IRQ_ENABLE(temp), |
571 | &xhci->ir_set->irq_pending); | |
09ece30e | 572 | xhci_print_ir_set(xhci, 0); |
66d4eadd | 573 | |
0238634d SS |
574 | if (xhci->quirks & XHCI_NEC_HOST) |
575 | xhci_queue_vendor_command(xhci, 0, 0, 0, | |
576 | TRB_TYPE(TRB_NEC_GET_FW)); | |
7f84eef0 | 577 | |
f6ff0ac8 SS |
578 | xhci_dbg(xhci, "Finished xhci_run for USB2 roothub\n"); |
579 | return 0; | |
580 | } | |
ed07453f | 581 | |
f6ff0ac8 SS |
582 | static void xhci_only_stop_hcd(struct usb_hcd *hcd) |
583 | { | |
584 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
66d4eadd | 585 | |
f6ff0ac8 SS |
586 | spin_lock_irq(&xhci->lock); |
587 | xhci_halt(xhci); | |
588 | ||
589 | /* The shared_hcd is going to be deallocated shortly (the USB core only | |
590 | * calls this function when allocation fails in usb_add_hcd(), or | |
591 | * usb_remove_hcd() is called). So we need to unset xHCI's pointer. | |
592 | */ | |
593 | xhci->shared_hcd = NULL; | |
594 | spin_unlock_irq(&xhci->lock); | |
66d4eadd SS |
595 | } |
596 | ||
597 | /* | |
598 | * Stop xHCI driver. | |
599 | * | |
600 | * This function is called by the USB core when the HC driver is removed. | |
601 | * Its opposite is xhci_run(). | |
602 | * | |
603 | * Disable device contexts, disable IRQs, and quiesce the HC. | |
604 | * Reset the HC, finish any completed transactions, and cleanup memory. | |
605 | */ | |
606 | void xhci_stop(struct usb_hcd *hcd) | |
607 | { | |
608 | u32 temp; | |
609 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
610 | ||
f6ff0ac8 SS |
611 | if (!usb_hcd_is_primary_hcd(hcd)) { |
612 | xhci_only_stop_hcd(xhci->shared_hcd); | |
613 | return; | |
614 | } | |
615 | ||
66d4eadd | 616 | spin_lock_irq(&xhci->lock); |
f6ff0ac8 SS |
617 | /* Make sure the xHC is halted for a USB3 roothub |
618 | * (xhci_stop() could be called as part of failed init). | |
619 | */ | |
66d4eadd SS |
620 | xhci_halt(xhci); |
621 | xhci_reset(xhci); | |
622 | spin_unlock_irq(&xhci->lock); | |
623 | ||
40a9fb17 ZR |
624 | xhci_cleanup_msix(xhci); |
625 | ||
7f84eef0 SS |
626 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
627 | /* Tell the event ring poll function not to reschedule */ | |
628 | xhci->zombie = 1; | |
629 | del_timer_sync(&xhci->event_ring_timer); | |
630 | #endif | |
631 | ||
c41136b0 AX |
632 | if (xhci->quirks & XHCI_AMD_PLL_FIX) |
633 | usb_amd_dev_put(); | |
634 | ||
66d4eadd SS |
635 | xhci_dbg(xhci, "// Disabling event ring interrupts\n"); |
636 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
637 | xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status); | |
638 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
639 | xhci_writel(xhci, ER_IRQ_DISABLE(temp), | |
640 | &xhci->ir_set->irq_pending); | |
09ece30e | 641 | xhci_print_ir_set(xhci, 0); |
66d4eadd SS |
642 | |
643 | xhci_dbg(xhci, "cleaning up memory\n"); | |
644 | xhci_mem_cleanup(xhci); | |
645 | xhci_dbg(xhci, "xhci_stop completed - status = %x\n", | |
646 | xhci_readl(xhci, &xhci->op_regs->status)); | |
647 | } | |
648 | ||
649 | /* | |
650 | * Shutdown HC (not bus-specific) | |
651 | * | |
652 | * This is called when the machine is rebooting or halting. We assume that the | |
653 | * machine will be powered off, and the HC's internal state will be reset. | |
654 | * Don't bother to free memory. | |
f6ff0ac8 SS |
655 | * |
656 | * This will only ever be called with the main usb_hcd (the USB3 roothub). | |
66d4eadd SS |
657 | */ |
658 | void xhci_shutdown(struct usb_hcd *hcd) | |
659 | { | |
660 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
661 | ||
e95829f4 SS |
662 | if (xhci->quirks && XHCI_SPURIOUS_REBOOT) |
663 | usb_disable_xhci_ports(to_pci_dev(hcd->self.controller)); | |
664 | ||
66d4eadd SS |
665 | spin_lock_irq(&xhci->lock); |
666 | xhci_halt(xhci); | |
43b86af8 | 667 | spin_unlock_irq(&xhci->lock); |
66d4eadd | 668 | |
40a9fb17 ZR |
669 | xhci_cleanup_msix(xhci); |
670 | ||
66d4eadd SS |
671 | xhci_dbg(xhci, "xhci_shutdown completed - status = %x\n", |
672 | xhci_readl(xhci, &xhci->op_regs->status)); | |
673 | } | |
674 | ||
b5b5c3ac | 675 | #ifdef CONFIG_PM |
5535b1d5 AX |
676 | static void xhci_save_registers(struct xhci_hcd *xhci) |
677 | { | |
678 | xhci->s3.command = xhci_readl(xhci, &xhci->op_regs->command); | |
679 | xhci->s3.dev_nt = xhci_readl(xhci, &xhci->op_regs->dev_notification); | |
680 | xhci->s3.dcbaa_ptr = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); | |
681 | xhci->s3.config_reg = xhci_readl(xhci, &xhci->op_regs->config_reg); | |
5535b1d5 AX |
682 | xhci->s3.erst_size = xhci_readl(xhci, &xhci->ir_set->erst_size); |
683 | xhci->s3.erst_base = xhci_read_64(xhci, &xhci->ir_set->erst_base); | |
684 | xhci->s3.erst_dequeue = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue); | |
c7713e73 SS |
685 | xhci->s3.irq_pending = xhci_readl(xhci, &xhci->ir_set->irq_pending); |
686 | xhci->s3.irq_control = xhci_readl(xhci, &xhci->ir_set->irq_control); | |
5535b1d5 AX |
687 | } |
688 | ||
689 | static void xhci_restore_registers(struct xhci_hcd *xhci) | |
690 | { | |
691 | xhci_writel(xhci, xhci->s3.command, &xhci->op_regs->command); | |
692 | xhci_writel(xhci, xhci->s3.dev_nt, &xhci->op_regs->dev_notification); | |
693 | xhci_write_64(xhci, xhci->s3.dcbaa_ptr, &xhci->op_regs->dcbaa_ptr); | |
694 | xhci_writel(xhci, xhci->s3.config_reg, &xhci->op_regs->config_reg); | |
5535b1d5 AX |
695 | xhci_writel(xhci, xhci->s3.erst_size, &xhci->ir_set->erst_size); |
696 | xhci_write_64(xhci, xhci->s3.erst_base, &xhci->ir_set->erst_base); | |
fb3d85bc | 697 | xhci_write_64(xhci, xhci->s3.erst_dequeue, &xhci->ir_set->erst_dequeue); |
c7713e73 SS |
698 | xhci_writel(xhci, xhci->s3.irq_pending, &xhci->ir_set->irq_pending); |
699 | xhci_writel(xhci, xhci->s3.irq_control, &xhci->ir_set->irq_control); | |
5535b1d5 AX |
700 | } |
701 | ||
89821320 SS |
702 | static void xhci_set_cmd_ring_deq(struct xhci_hcd *xhci) |
703 | { | |
704 | u64 val_64; | |
705 | ||
706 | /* step 2: initialize command ring buffer */ | |
707 | val_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); | |
708 | val_64 = (val_64 & (u64) CMD_RING_RSVD_BITS) | | |
709 | (xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg, | |
710 | xhci->cmd_ring->dequeue) & | |
711 | (u64) ~CMD_RING_RSVD_BITS) | | |
712 | xhci->cmd_ring->cycle_state; | |
713 | xhci_dbg(xhci, "// Setting command ring address to 0x%llx\n", | |
714 | (long unsigned long) val_64); | |
715 | xhci_write_64(xhci, val_64, &xhci->op_regs->cmd_ring); | |
716 | } | |
717 | ||
718 | /* | |
719 | * The whole command ring must be cleared to zero when we suspend the host. | |
720 | * | |
721 | * The host doesn't save the command ring pointer in the suspend well, so we | |
722 | * need to re-program it on resume. Unfortunately, the pointer must be 64-byte | |
723 | * aligned, because of the reserved bits in the command ring dequeue pointer | |
724 | * register. Therefore, we can't just set the dequeue pointer back in the | |
725 | * middle of the ring (TRBs are 16-byte aligned). | |
726 | */ | |
727 | static void xhci_clear_command_ring(struct xhci_hcd *xhci) | |
728 | { | |
729 | struct xhci_ring *ring; | |
730 | struct xhci_segment *seg; | |
731 | ||
732 | ring = xhci->cmd_ring; | |
733 | seg = ring->deq_seg; | |
734 | do { | |
158886cd AX |
735 | memset(seg->trbs, 0, |
736 | sizeof(union xhci_trb) * (TRBS_PER_SEGMENT - 1)); | |
737 | seg->trbs[TRBS_PER_SEGMENT - 1].link.control &= | |
738 | cpu_to_le32(~TRB_CYCLE); | |
89821320 SS |
739 | seg = seg->next; |
740 | } while (seg != ring->deq_seg); | |
741 | ||
742 | /* Reset the software enqueue and dequeue pointers */ | |
743 | ring->deq_seg = ring->first_seg; | |
744 | ring->dequeue = ring->first_seg->trbs; | |
745 | ring->enq_seg = ring->deq_seg; | |
746 | ring->enqueue = ring->dequeue; | |
747 | ||
b008df60 | 748 | ring->num_trbs_free = ring->num_segs * (TRBS_PER_SEGMENT - 1) - 1; |
89821320 SS |
749 | /* |
750 | * Ring is now zeroed, so the HW should look for change of ownership | |
751 | * when the cycle bit is set to 1. | |
752 | */ | |
753 | ring->cycle_state = 1; | |
754 | ||
755 | /* | |
756 | * Reset the hardware dequeue pointer. | |
757 | * Yes, this will need to be re-written after resume, but we're paranoid | |
758 | * and want to make sure the hardware doesn't access bogus memory | |
759 | * because, say, the BIOS or an SMI started the host without changing | |
760 | * the command ring pointers. | |
761 | */ | |
762 | xhci_set_cmd_ring_deq(xhci); | |
763 | } | |
764 | ||
5535b1d5 AX |
765 | /* |
766 | * Stop HC (not bus-specific) | |
767 | * | |
768 | * This is called when the machine transition into S3/S4 mode. | |
769 | * | |
770 | */ | |
771 | int xhci_suspend(struct xhci_hcd *xhci) | |
772 | { | |
773 | int rc = 0; | |
774 | struct usb_hcd *hcd = xhci_to_hcd(xhci); | |
775 | u32 command; | |
776 | ||
777 | spin_lock_irq(&xhci->lock); | |
778 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
b3209379 | 779 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags); |
5535b1d5 AX |
780 | /* step 1: stop endpoint */ |
781 | /* skipped assuming that port suspend has done */ | |
782 | ||
783 | /* step 2: clear Run/Stop bit */ | |
784 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
785 | command &= ~CMD_RUN; | |
786 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
787 | if (handshake(xhci, &xhci->op_regs->status, | |
788 | STS_HALT, STS_HALT, 100*100)) { | |
789 | xhci_warn(xhci, "WARN: xHC CMD_RUN timeout\n"); | |
790 | spin_unlock_irq(&xhci->lock); | |
791 | return -ETIMEDOUT; | |
792 | } | |
89821320 | 793 | xhci_clear_command_ring(xhci); |
5535b1d5 AX |
794 | |
795 | /* step 3: save registers */ | |
796 | xhci_save_registers(xhci); | |
797 | ||
798 | /* step 4: set CSS flag */ | |
799 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
800 | command |= CMD_CSS; | |
801 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
622eb783 AX |
802 | if (handshake(xhci, &xhci->op_regs->status, STS_SAVE, 0, 10 * 1000)) { |
803 | xhci_warn(xhci, "WARN: xHC save state timeout\n"); | |
5535b1d5 AX |
804 | spin_unlock_irq(&xhci->lock); |
805 | return -ETIMEDOUT; | |
806 | } | |
5535b1d5 AX |
807 | spin_unlock_irq(&xhci->lock); |
808 | ||
0029227f AX |
809 | /* step 5: remove core well power */ |
810 | /* synchronize irq when using MSI-X */ | |
421aa841 | 811 | xhci_msix_sync_irqs(xhci); |
0029227f | 812 | |
5535b1d5 AX |
813 | return rc; |
814 | } | |
815 | ||
816 | /* | |
817 | * start xHC (not bus-specific) | |
818 | * | |
819 | * This is called when the machine transition from S3/S4 mode. | |
820 | * | |
821 | */ | |
822 | int xhci_resume(struct xhci_hcd *xhci, bool hibernated) | |
823 | { | |
824 | u32 command, temp = 0; | |
825 | struct usb_hcd *hcd = xhci_to_hcd(xhci); | |
65b22f93 | 826 | struct usb_hcd *secondary_hcd; |
f69e3120 | 827 | int retval = 0; |
5535b1d5 | 828 | |
f6ff0ac8 | 829 | /* Wait a bit if either of the roothubs need to settle from the |
25985edc | 830 | * transition into bus suspend. |
20b67cf5 | 831 | */ |
f6ff0ac8 SS |
832 | if (time_before(jiffies, xhci->bus_state[0].next_statechange) || |
833 | time_before(jiffies, | |
834 | xhci->bus_state[1].next_statechange)) | |
5535b1d5 AX |
835 | msleep(100); |
836 | ||
f69e3120 AS |
837 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
838 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags); | |
839 | ||
5535b1d5 | 840 | spin_lock_irq(&xhci->lock); |
c877b3b2 ML |
841 | if (xhci->quirks & XHCI_RESET_ON_RESUME) |
842 | hibernated = true; | |
5535b1d5 AX |
843 | |
844 | if (!hibernated) { | |
845 | /* step 1: restore register */ | |
846 | xhci_restore_registers(xhci); | |
847 | /* step 2: initialize command ring buffer */ | |
89821320 | 848 | xhci_set_cmd_ring_deq(xhci); |
5535b1d5 AX |
849 | /* step 3: restore state and start state*/ |
850 | /* step 3: set CRS flag */ | |
851 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
852 | command |= CMD_CRS; | |
853 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
854 | if (handshake(xhci, &xhci->op_regs->status, | |
622eb783 AX |
855 | STS_RESTORE, 0, 10 * 1000)) { |
856 | xhci_warn(xhci, "WARN: xHC restore state timeout\n"); | |
5535b1d5 AX |
857 | spin_unlock_irq(&xhci->lock); |
858 | return -ETIMEDOUT; | |
859 | } | |
860 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
861 | } | |
862 | ||
863 | /* If restore operation fails, re-initialize the HC during resume */ | |
864 | if ((temp & STS_SRE) || hibernated) { | |
fedd383e SS |
865 | /* Let the USB core know _both_ roothubs lost power. */ |
866 | usb_root_hub_lost_power(xhci->main_hcd->self.root_hub); | |
867 | usb_root_hub_lost_power(xhci->shared_hcd->self.root_hub); | |
5535b1d5 AX |
868 | |
869 | xhci_dbg(xhci, "Stop HCD\n"); | |
870 | xhci_halt(xhci); | |
871 | xhci_reset(xhci); | |
5535b1d5 | 872 | spin_unlock_irq(&xhci->lock); |
0029227f | 873 | xhci_cleanup_msix(xhci); |
5535b1d5 AX |
874 | |
875 | #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING | |
876 | /* Tell the event ring poll function not to reschedule */ | |
877 | xhci->zombie = 1; | |
878 | del_timer_sync(&xhci->event_ring_timer); | |
879 | #endif | |
880 | ||
881 | xhci_dbg(xhci, "// Disabling event ring interrupts\n"); | |
882 | temp = xhci_readl(xhci, &xhci->op_regs->status); | |
883 | xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status); | |
884 | temp = xhci_readl(xhci, &xhci->ir_set->irq_pending); | |
885 | xhci_writel(xhci, ER_IRQ_DISABLE(temp), | |
886 | &xhci->ir_set->irq_pending); | |
09ece30e | 887 | xhci_print_ir_set(xhci, 0); |
5535b1d5 AX |
888 | |
889 | xhci_dbg(xhci, "cleaning up memory\n"); | |
890 | xhci_mem_cleanup(xhci); | |
891 | xhci_dbg(xhci, "xhci_stop completed - status = %x\n", | |
892 | xhci_readl(xhci, &xhci->op_regs->status)); | |
893 | ||
65b22f93 SS |
894 | /* USB core calls the PCI reinit and start functions twice: |
895 | * first with the primary HCD, and then with the secondary HCD. | |
896 | * If we don't do the same, the host will never be started. | |
897 | */ | |
898 | if (!usb_hcd_is_primary_hcd(hcd)) | |
899 | secondary_hcd = hcd; | |
900 | else | |
901 | secondary_hcd = xhci->shared_hcd; | |
902 | ||
903 | xhci_dbg(xhci, "Initialize the xhci_hcd\n"); | |
904 | retval = xhci_init(hcd->primary_hcd); | |
5535b1d5 AX |
905 | if (retval) |
906 | return retval; | |
65b22f93 SS |
907 | xhci_dbg(xhci, "Start the primary HCD\n"); |
908 | retval = xhci_run(hcd->primary_hcd); | |
b3209379 | 909 | if (!retval) { |
f69e3120 AS |
910 | xhci_dbg(xhci, "Start the secondary HCD\n"); |
911 | retval = xhci_run(secondary_hcd); | |
b3209379 | 912 | } |
5535b1d5 | 913 | hcd->state = HC_STATE_SUSPENDED; |
b3209379 | 914 | xhci->shared_hcd->state = HC_STATE_SUSPENDED; |
f69e3120 | 915 | goto done; |
5535b1d5 AX |
916 | } |
917 | ||
5535b1d5 AX |
918 | /* step 4: set Run/Stop bit */ |
919 | command = xhci_readl(xhci, &xhci->op_regs->command); | |
920 | command |= CMD_RUN; | |
921 | xhci_writel(xhci, command, &xhci->op_regs->command); | |
922 | handshake(xhci, &xhci->op_regs->status, STS_HALT, | |
923 | 0, 250 * 1000); | |
924 | ||
925 | /* step 5: walk topology and initialize portsc, | |
926 | * portpmsc and portli | |
927 | */ | |
928 | /* this is done in bus_resume */ | |
929 | ||
930 | /* step 6: restart each of the previously | |
931 | * Running endpoints by ringing their doorbells | |
932 | */ | |
933 | ||
5535b1d5 | 934 | spin_unlock_irq(&xhci->lock); |
f69e3120 AS |
935 | |
936 | done: | |
937 | if (retval == 0) { | |
938 | usb_hcd_resume_root_hub(hcd); | |
939 | usb_hcd_resume_root_hub(xhci->shared_hcd); | |
940 | } | |
941 | return retval; | |
5535b1d5 | 942 | } |
b5b5c3ac SS |
943 | #endif /* CONFIG_PM */ |
944 | ||
7f84eef0 SS |
945 | /*-------------------------------------------------------------------------*/ |
946 | ||
d0e96f5a SS |
947 | /** |
948 | * xhci_get_endpoint_index - Used for passing endpoint bitmasks between the core and | |
949 | * HCDs. Find the index for an endpoint given its descriptor. Use the return | |
950 | * value to right shift 1 for the bitmask. | |
951 | * | |
952 | * Index = (epnum * 2) + direction - 1, | |
953 | * where direction = 0 for OUT, 1 for IN. | |
954 | * For control endpoints, the IN index is used (OUT index is unused), so | |
955 | * index = (epnum * 2) + direction - 1 = (epnum * 2) + 1 - 1 = (epnum * 2) | |
956 | */ | |
957 | unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc) | |
958 | { | |
959 | unsigned int index; | |
960 | if (usb_endpoint_xfer_control(desc)) | |
961 | index = (unsigned int) (usb_endpoint_num(desc)*2); | |
962 | else | |
963 | index = (unsigned int) (usb_endpoint_num(desc)*2) + | |
964 | (usb_endpoint_dir_in(desc) ? 1 : 0) - 1; | |
965 | return index; | |
966 | } | |
967 | ||
f94e0186 SS |
968 | /* Find the flag for this endpoint (for use in the control context). Use the |
969 | * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is | |
970 | * bit 1, etc. | |
971 | */ | |
972 | unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc) | |
973 | { | |
974 | return 1 << (xhci_get_endpoint_index(desc) + 1); | |
975 | } | |
976 | ||
ac9d8fe7 SS |
977 | /* Find the flag for this endpoint (for use in the control context). Use the |
978 | * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is | |
979 | * bit 1, etc. | |
980 | */ | |
981 | unsigned int xhci_get_endpoint_flag_from_index(unsigned int ep_index) | |
982 | { | |
983 | return 1 << (ep_index + 1); | |
984 | } | |
985 | ||
f94e0186 SS |
986 | /* Compute the last valid endpoint context index. Basically, this is the |
987 | * endpoint index plus one. For slot contexts with more than valid endpoint, | |
988 | * we find the most significant bit set in the added contexts flags. | |
989 | * e.g. ep 1 IN (with epnum 0x81) => added_ctxs = 0b1000 | |
990 | * fls(0b1000) = 4, but the endpoint context index is 3, so subtract one. | |
991 | */ | |
ac9d8fe7 | 992 | unsigned int xhci_last_valid_endpoint(u32 added_ctxs) |
f94e0186 SS |
993 | { |
994 | return fls(added_ctxs) - 1; | |
995 | } | |
996 | ||
d0e96f5a SS |
997 | /* Returns 1 if the arguments are OK; |
998 | * returns 0 this is a root hub; returns -EINVAL for NULL pointers. | |
999 | */ | |
8212a49d | 1000 | static int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev, |
64927730 AX |
1001 | struct usb_host_endpoint *ep, int check_ep, bool check_virt_dev, |
1002 | const char *func) { | |
1003 | struct xhci_hcd *xhci; | |
1004 | struct xhci_virt_device *virt_dev; | |
1005 | ||
d0e96f5a SS |
1006 | if (!hcd || (check_ep && !ep) || !udev) { |
1007 | printk(KERN_DEBUG "xHCI %s called with invalid args\n", | |
1008 | func); | |
1009 | return -EINVAL; | |
1010 | } | |
1011 | if (!udev->parent) { | |
1012 | printk(KERN_DEBUG "xHCI %s called for root hub\n", | |
1013 | func); | |
1014 | return 0; | |
1015 | } | |
64927730 | 1016 | |
7bd89b40 SS |
1017 | xhci = hcd_to_xhci(hcd); |
1018 | if (xhci->xhc_state & XHCI_STATE_HALTED) | |
1019 | return -ENODEV; | |
1020 | ||
64927730 | 1021 | if (check_virt_dev) { |
73ddc247 | 1022 | if (!udev->slot_id || !xhci->devs[udev->slot_id]) { |
64927730 AX |
1023 | printk(KERN_DEBUG "xHCI %s called with unaddressed " |
1024 | "device\n", func); | |
1025 | return -EINVAL; | |
1026 | } | |
1027 | ||
1028 | virt_dev = xhci->devs[udev->slot_id]; | |
1029 | if (virt_dev->udev != udev) { | |
1030 | printk(KERN_DEBUG "xHCI %s called with udev and " | |
1031 | "virt_dev does not match\n", func); | |
1032 | return -EINVAL; | |
1033 | } | |
d0e96f5a | 1034 | } |
64927730 | 1035 | |
d0e96f5a SS |
1036 | return 1; |
1037 | } | |
1038 | ||
2d3f1fac | 1039 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, |
913a8a34 SS |
1040 | struct usb_device *udev, struct xhci_command *command, |
1041 | bool ctx_change, bool must_succeed); | |
2d3f1fac SS |
1042 | |
1043 | /* | |
1044 | * Full speed devices may have a max packet size greater than 8 bytes, but the | |
1045 | * USB core doesn't know that until it reads the first 8 bytes of the | |
1046 | * descriptor. If the usb_device's max packet size changes after that point, | |
1047 | * we need to issue an evaluate context command and wait on it. | |
1048 | */ | |
1049 | static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id, | |
1050 | unsigned int ep_index, struct urb *urb) | |
1051 | { | |
1052 | struct xhci_container_ctx *in_ctx; | |
1053 | struct xhci_container_ctx *out_ctx; | |
1054 | struct xhci_input_control_ctx *ctrl_ctx; | |
1055 | struct xhci_ep_ctx *ep_ctx; | |
1056 | int max_packet_size; | |
1057 | int hw_max_packet_size; | |
1058 | int ret = 0; | |
1059 | ||
1060 | out_ctx = xhci->devs[slot_id]->out_ctx; | |
1061 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); | |
28ccd296 | 1062 | hw_max_packet_size = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2)); |
29cc8897 | 1063 | max_packet_size = usb_endpoint_maxp(&urb->dev->ep0.desc); |
2d3f1fac SS |
1064 | if (hw_max_packet_size != max_packet_size) { |
1065 | xhci_dbg(xhci, "Max Packet Size for ep 0 changed.\n"); | |
1066 | xhci_dbg(xhci, "Max packet size in usb_device = %d\n", | |
1067 | max_packet_size); | |
1068 | xhci_dbg(xhci, "Max packet size in xHCI HW = %d\n", | |
1069 | hw_max_packet_size); | |
1070 | xhci_dbg(xhci, "Issuing evaluate context command.\n"); | |
1071 | ||
1072 | /* Set up the modified control endpoint 0 */ | |
913a8a34 SS |
1073 | xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, |
1074 | xhci->devs[slot_id]->out_ctx, ep_index); | |
2d3f1fac SS |
1075 | in_ctx = xhci->devs[slot_id]->in_ctx; |
1076 | ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); | |
28ccd296 ME |
1077 | ep_ctx->ep_info2 &= cpu_to_le32(~MAX_PACKET_MASK); |
1078 | ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet_size)); | |
2d3f1fac SS |
1079 | |
1080 | /* Set up the input context flags for the command */ | |
1081 | /* FIXME: This won't work if a non-default control endpoint | |
1082 | * changes max packet sizes. | |
1083 | */ | |
1084 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
28ccd296 | 1085 | ctrl_ctx->add_flags = cpu_to_le32(EP0_FLAG); |
2d3f1fac SS |
1086 | ctrl_ctx->drop_flags = 0; |
1087 | ||
1088 | xhci_dbg(xhci, "Slot %d input context\n", slot_id); | |
1089 | xhci_dbg_ctx(xhci, in_ctx, ep_index); | |
1090 | xhci_dbg(xhci, "Slot %d output context\n", slot_id); | |
1091 | xhci_dbg_ctx(xhci, out_ctx, ep_index); | |
1092 | ||
913a8a34 SS |
1093 | ret = xhci_configure_endpoint(xhci, urb->dev, NULL, |
1094 | true, false); | |
2d3f1fac SS |
1095 | |
1096 | /* Clean up the input context for later use by bandwidth | |
1097 | * functions. | |
1098 | */ | |
28ccd296 | 1099 | ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG); |
2d3f1fac SS |
1100 | } |
1101 | return ret; | |
1102 | } | |
1103 | ||
d0e96f5a SS |
1104 | /* |
1105 | * non-error returns are a promise to giveback() the urb later | |
1106 | * we drop ownership so next owner (or urb unlink) can get it | |
1107 | */ | |
1108 | int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) | |
1109 | { | |
1110 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
2ffdea25 | 1111 | struct xhci_td *buffer; |
d0e96f5a SS |
1112 | unsigned long flags; |
1113 | int ret = 0; | |
1114 | unsigned int slot_id, ep_index; | |
8e51adcc AX |
1115 | struct urb_priv *urb_priv; |
1116 | int size, i; | |
2d3f1fac | 1117 | |
64927730 AX |
1118 | if (!urb || xhci_check_args(hcd, urb->dev, urb->ep, |
1119 | true, true, __func__) <= 0) | |
d0e96f5a SS |
1120 | return -EINVAL; |
1121 | ||
1122 | slot_id = urb->dev->slot_id; | |
1123 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); | |
d0e96f5a | 1124 | |
541c7d43 | 1125 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
d0e96f5a SS |
1126 | if (!in_interrupt()) |
1127 | xhci_dbg(xhci, "urb submitted during PCI suspend\n"); | |
1128 | ret = -ESHUTDOWN; | |
1129 | goto exit; | |
1130 | } | |
8e51adcc AX |
1131 | |
1132 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) | |
1133 | size = urb->number_of_packets; | |
1134 | else | |
1135 | size = 1; | |
1136 | ||
1137 | urb_priv = kzalloc(sizeof(struct urb_priv) + | |
1138 | size * sizeof(struct xhci_td *), mem_flags); | |
1139 | if (!urb_priv) | |
1140 | return -ENOMEM; | |
1141 | ||
2ffdea25 AX |
1142 | buffer = kzalloc(size * sizeof(struct xhci_td), mem_flags); |
1143 | if (!buffer) { | |
1144 | kfree(urb_priv); | |
1145 | return -ENOMEM; | |
1146 | } | |
1147 | ||
8e51adcc | 1148 | for (i = 0; i < size; i++) { |
2ffdea25 AX |
1149 | urb_priv->td[i] = buffer; |
1150 | buffer++; | |
8e51adcc AX |
1151 | } |
1152 | ||
1153 | urb_priv->length = size; | |
1154 | urb_priv->td_cnt = 0; | |
1155 | urb->hcpriv = urb_priv; | |
1156 | ||
2d3f1fac SS |
1157 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
1158 | /* Check to see if the max packet size for the default control | |
1159 | * endpoint changed during FS device enumeration | |
1160 | */ | |
1161 | if (urb->dev->speed == USB_SPEED_FULL) { | |
1162 | ret = xhci_check_maxpacket(xhci, slot_id, | |
1163 | ep_index, urb); | |
d13565c1 SS |
1164 | if (ret < 0) { |
1165 | xhci_urb_free_priv(xhci, urb_priv); | |
1166 | urb->hcpriv = NULL; | |
2d3f1fac | 1167 | return ret; |
d13565c1 | 1168 | } |
2d3f1fac SS |
1169 | } |
1170 | ||
b11069f5 SS |
1171 | /* We have a spinlock and interrupts disabled, so we must pass |
1172 | * atomic context to this function, which may allocate memory. | |
1173 | */ | |
2d3f1fac | 1174 | spin_lock_irqsave(&xhci->lock, flags); |
6f5165cf SS |
1175 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1176 | goto dying; | |
b11069f5 | 1177 | ret = xhci_queue_ctrl_tx(xhci, GFP_ATOMIC, urb, |
23e3be11 | 1178 | slot_id, ep_index); |
d13565c1 SS |
1179 | if (ret) |
1180 | goto free_priv; | |
2d3f1fac SS |
1181 | spin_unlock_irqrestore(&xhci->lock, flags); |
1182 | } else if (usb_endpoint_xfer_bulk(&urb->ep->desc)) { | |
1183 | spin_lock_irqsave(&xhci->lock, flags); | |
6f5165cf SS |
1184 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1185 | goto dying; | |
8df75f42 SS |
1186 | if (xhci->devs[slot_id]->eps[ep_index].ep_state & |
1187 | EP_GETTING_STREAMS) { | |
1188 | xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep " | |
1189 | "is transitioning to using streams.\n"); | |
1190 | ret = -EINVAL; | |
1191 | } else if (xhci->devs[slot_id]->eps[ep_index].ep_state & | |
1192 | EP_GETTING_NO_STREAMS) { | |
1193 | xhci_warn(xhci, "WARN: Can't enqueue URB while bulk ep " | |
1194 | "is transitioning to " | |
1195 | "not having streams.\n"); | |
1196 | ret = -EINVAL; | |
1197 | } else { | |
1198 | ret = xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb, | |
1199 | slot_id, ep_index); | |
1200 | } | |
d13565c1 SS |
1201 | if (ret) |
1202 | goto free_priv; | |
2d3f1fac | 1203 | spin_unlock_irqrestore(&xhci->lock, flags); |
624defa1 SS |
1204 | } else if (usb_endpoint_xfer_int(&urb->ep->desc)) { |
1205 | spin_lock_irqsave(&xhci->lock, flags); | |
6f5165cf SS |
1206 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1207 | goto dying; | |
624defa1 SS |
1208 | ret = xhci_queue_intr_tx(xhci, GFP_ATOMIC, urb, |
1209 | slot_id, ep_index); | |
d13565c1 SS |
1210 | if (ret) |
1211 | goto free_priv; | |
624defa1 | 1212 | spin_unlock_irqrestore(&xhci->lock, flags); |
2d3f1fac | 1213 | } else { |
787f4e5a AX |
1214 | spin_lock_irqsave(&xhci->lock, flags); |
1215 | if (xhci->xhc_state & XHCI_STATE_DYING) | |
1216 | goto dying; | |
1217 | ret = xhci_queue_isoc_tx_prepare(xhci, GFP_ATOMIC, urb, | |
1218 | slot_id, ep_index); | |
d13565c1 SS |
1219 | if (ret) |
1220 | goto free_priv; | |
787f4e5a | 1221 | spin_unlock_irqrestore(&xhci->lock, flags); |
2d3f1fac | 1222 | } |
d0e96f5a | 1223 | exit: |
d0e96f5a | 1224 | return ret; |
6f5165cf SS |
1225 | dying: |
1226 | xhci_dbg(xhci, "Ep 0x%x: URB %p submitted for " | |
1227 | "non-responsive xHCI host.\n", | |
1228 | urb->ep->desc.bEndpointAddress, urb); | |
d13565c1 SS |
1229 | ret = -ESHUTDOWN; |
1230 | free_priv: | |
1231 | xhci_urb_free_priv(xhci, urb_priv); | |
1232 | urb->hcpriv = NULL; | |
6f5165cf | 1233 | spin_unlock_irqrestore(&xhci->lock, flags); |
d13565c1 | 1234 | return ret; |
d0e96f5a SS |
1235 | } |
1236 | ||
021bff91 SS |
1237 | /* Get the right ring for the given URB. |
1238 | * If the endpoint supports streams, boundary check the URB's stream ID. | |
1239 | * If the endpoint doesn't support streams, return the singular endpoint ring. | |
1240 | */ | |
1241 | static struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci, | |
1242 | struct urb *urb) | |
1243 | { | |
1244 | unsigned int slot_id; | |
1245 | unsigned int ep_index; | |
1246 | unsigned int stream_id; | |
1247 | struct xhci_virt_ep *ep; | |
1248 | ||
1249 | slot_id = urb->dev->slot_id; | |
1250 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); | |
1251 | stream_id = urb->stream_id; | |
1252 | ep = &xhci->devs[slot_id]->eps[ep_index]; | |
1253 | /* Common case: no streams */ | |
1254 | if (!(ep->ep_state & EP_HAS_STREAMS)) | |
1255 | return ep->ring; | |
1256 | ||
1257 | if (stream_id == 0) { | |
1258 | xhci_warn(xhci, | |
1259 | "WARN: Slot ID %u, ep index %u has streams, " | |
1260 | "but URB has no stream ID.\n", | |
1261 | slot_id, ep_index); | |
1262 | return NULL; | |
1263 | } | |
1264 | ||
1265 | if (stream_id < ep->stream_info->num_streams) | |
1266 | return ep->stream_info->stream_rings[stream_id]; | |
1267 | ||
1268 | xhci_warn(xhci, | |
1269 | "WARN: Slot ID %u, ep index %u has " | |
1270 | "stream IDs 1 to %u allocated, " | |
1271 | "but stream ID %u is requested.\n", | |
1272 | slot_id, ep_index, | |
1273 | ep->stream_info->num_streams - 1, | |
1274 | stream_id); | |
1275 | return NULL; | |
1276 | } | |
1277 | ||
ae636747 SS |
1278 | /* |
1279 | * Remove the URB's TD from the endpoint ring. This may cause the HC to stop | |
1280 | * USB transfers, potentially stopping in the middle of a TRB buffer. The HC | |
1281 | * should pick up where it left off in the TD, unless a Set Transfer Ring | |
1282 | * Dequeue Pointer is issued. | |
1283 | * | |
1284 | * The TRBs that make up the buffers for the canceled URB will be "removed" from | |
1285 | * the ring. Since the ring is a contiguous structure, they can't be physically | |
1286 | * removed. Instead, there are two options: | |
1287 | * | |
1288 | * 1) If the HC is in the middle of processing the URB to be canceled, we | |
1289 | * simply move the ring's dequeue pointer past those TRBs using the Set | |
1290 | * Transfer Ring Dequeue Pointer command. This will be the common case, | |
1291 | * when drivers timeout on the last submitted URB and attempt to cancel. | |
1292 | * | |
1293 | * 2) If the HC is in the middle of a different TD, we turn the TRBs into a | |
1294 | * series of 1-TRB transfer no-op TDs. (No-ops shouldn't be chained.) The | |
1295 | * HC will need to invalidate the any TRBs it has cached after the stop | |
1296 | * endpoint command, as noted in the xHCI 0.95 errata. | |
1297 | * | |
1298 | * 3) The TD may have completed by the time the Stop Endpoint Command | |
1299 | * completes, so software needs to handle that case too. | |
1300 | * | |
1301 | * This function should protect against the TD enqueueing code ringing the | |
1302 | * doorbell while this code is waiting for a Stop Endpoint command to complete. | |
1303 | * It also needs to account for multiple cancellations on happening at the same | |
1304 | * time for the same endpoint. | |
1305 | * | |
1306 | * Note that this function can be called in any context, or so says | |
1307 | * usb_hcd_unlink_urb() | |
d0e96f5a SS |
1308 | */ |
1309 | int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
1310 | { | |
ae636747 | 1311 | unsigned long flags; |
8e51adcc | 1312 | int ret, i; |
e34b2fbf | 1313 | u32 temp; |
ae636747 | 1314 | struct xhci_hcd *xhci; |
8e51adcc | 1315 | struct urb_priv *urb_priv; |
ae636747 SS |
1316 | struct xhci_td *td; |
1317 | unsigned int ep_index; | |
1318 | struct xhci_ring *ep_ring; | |
63a0d9ab | 1319 | struct xhci_virt_ep *ep; |
ae636747 SS |
1320 | |
1321 | xhci = hcd_to_xhci(hcd); | |
1322 | spin_lock_irqsave(&xhci->lock, flags); | |
1323 | /* Make sure the URB hasn't completed or been unlinked already */ | |
1324 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); | |
1325 | if (ret || !urb->hcpriv) | |
1326 | goto done; | |
e34b2fbf | 1327 | temp = xhci_readl(xhci, &xhci->op_regs->status); |
c6cc27c7 | 1328 | if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_HALTED)) { |
e34b2fbf | 1329 | xhci_dbg(xhci, "HW died, freeing TD.\n"); |
8e51adcc | 1330 | urb_priv = urb->hcpriv; |
585df1d9 SS |
1331 | for (i = urb_priv->td_cnt; i < urb_priv->length; i++) { |
1332 | td = urb_priv->td[i]; | |
1333 | if (!list_empty(&td->td_list)) | |
1334 | list_del_init(&td->td_list); | |
1335 | if (!list_empty(&td->cancelled_td_list)) | |
1336 | list_del_init(&td->cancelled_td_list); | |
1337 | } | |
e34b2fbf SS |
1338 | |
1339 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
1340 | spin_unlock_irqrestore(&xhci->lock, flags); | |
214f76f7 | 1341 | usb_hcd_giveback_urb(hcd, urb, -ESHUTDOWN); |
8e51adcc | 1342 | xhci_urb_free_priv(xhci, urb_priv); |
e34b2fbf SS |
1343 | return ret; |
1344 | } | |
7bd89b40 SS |
1345 | if ((xhci->xhc_state & XHCI_STATE_DYING) || |
1346 | (xhci->xhc_state & XHCI_STATE_HALTED)) { | |
6f5165cf SS |
1347 | xhci_dbg(xhci, "Ep 0x%x: URB %p to be canceled on " |
1348 | "non-responsive xHCI host.\n", | |
1349 | urb->ep->desc.bEndpointAddress, urb); | |
1350 | /* Let the stop endpoint command watchdog timer (which set this | |
1351 | * state) finish cleaning up the endpoint TD lists. We must | |
1352 | * have caught it in the middle of dropping a lock and giving | |
1353 | * back an URB. | |
1354 | */ | |
1355 | goto done; | |
1356 | } | |
ae636747 | 1357 | |
ae636747 | 1358 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); |
63a0d9ab | 1359 | ep = &xhci->devs[urb->dev->slot_id]->eps[ep_index]; |
e9df17eb SS |
1360 | ep_ring = xhci_urb_to_transfer_ring(xhci, urb); |
1361 | if (!ep_ring) { | |
1362 | ret = -EINVAL; | |
1363 | goto done; | |
1364 | } | |
1365 | ||
8e51adcc | 1366 | urb_priv = urb->hcpriv; |
79688acf SS |
1367 | i = urb_priv->td_cnt; |
1368 | if (i < urb_priv->length) | |
1369 | xhci_dbg(xhci, "Cancel URB %p, dev %s, ep 0x%x, " | |
1370 | "starting at offset 0x%llx\n", | |
1371 | urb, urb->dev->devpath, | |
1372 | urb->ep->desc.bEndpointAddress, | |
1373 | (unsigned long long) xhci_trb_virt_to_dma( | |
1374 | urb_priv->td[i]->start_seg, | |
1375 | urb_priv->td[i]->first_trb)); | |
1376 | ||
1377 | for (; i < urb_priv->length; i++) { | |
8e51adcc AX |
1378 | td = urb_priv->td[i]; |
1379 | list_add_tail(&td->cancelled_td_list, &ep->cancelled_td_list); | |
1380 | } | |
1381 | ||
ae636747 SS |
1382 | /* Queue a stop endpoint command, but only if this is |
1383 | * the first cancellation to be handled. | |
1384 | */ | |
678539cf SS |
1385 | if (!(ep->ep_state & EP_HALT_PENDING)) { |
1386 | ep->ep_state |= EP_HALT_PENDING; | |
6f5165cf SS |
1387 | ep->stop_cmds_pending++; |
1388 | ep->stop_cmd_timer.expires = jiffies + | |
1389 | XHCI_STOP_EP_CMD_TIMEOUT * HZ; | |
1390 | add_timer(&ep->stop_cmd_timer); | |
be88fe4f | 1391 | xhci_queue_stop_endpoint(xhci, urb->dev->slot_id, ep_index, 0); |
23e3be11 | 1392 | xhci_ring_cmd_db(xhci); |
ae636747 SS |
1393 | } |
1394 | done: | |
1395 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1396 | return ret; | |
d0e96f5a SS |
1397 | } |
1398 | ||
f94e0186 SS |
1399 | /* Drop an endpoint from a new bandwidth configuration for this device. |
1400 | * Only one call to this function is allowed per endpoint before | |
1401 | * check_bandwidth() or reset_bandwidth() must be called. | |
1402 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will | |
1403 | * add the endpoint to the schedule with possibly new parameters denoted by a | |
1404 | * different endpoint descriptor in usb_host_endpoint. | |
1405 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is | |
1406 | * not allowed. | |
f88ba78d SS |
1407 | * |
1408 | * The USB core will not allow URBs to be queued to an endpoint that is being | |
1409 | * disabled, so there's no need for mutual exclusion to protect | |
1410 | * the xhci->devs[slot_id] structure. | |
f94e0186 SS |
1411 | */ |
1412 | int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, | |
1413 | struct usb_host_endpoint *ep) | |
1414 | { | |
f94e0186 | 1415 | struct xhci_hcd *xhci; |
d115b048 JY |
1416 | struct xhci_container_ctx *in_ctx, *out_ctx; |
1417 | struct xhci_input_control_ctx *ctrl_ctx; | |
1418 | struct xhci_slot_ctx *slot_ctx; | |
f94e0186 SS |
1419 | unsigned int last_ctx; |
1420 | unsigned int ep_index; | |
1421 | struct xhci_ep_ctx *ep_ctx; | |
1422 | u32 drop_flag; | |
1423 | u32 new_add_flags, new_drop_flags, new_slot_info; | |
1424 | int ret; | |
1425 | ||
64927730 | 1426 | ret = xhci_check_args(hcd, udev, ep, 1, true, __func__); |
f94e0186 SS |
1427 | if (ret <= 0) |
1428 | return ret; | |
1429 | xhci = hcd_to_xhci(hcd); | |
fe6c6c13 SS |
1430 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1431 | return -ENODEV; | |
f94e0186 | 1432 | |
fe6c6c13 | 1433 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
1434 | drop_flag = xhci_get_endpoint_flag(&ep->desc); |
1435 | if (drop_flag == SLOT_FLAG || drop_flag == EP0_FLAG) { | |
1436 | xhci_dbg(xhci, "xHCI %s - can't drop slot or ep 0 %#x\n", | |
1437 | __func__, drop_flag); | |
1438 | return 0; | |
1439 | } | |
1440 | ||
f94e0186 | 1441 | in_ctx = xhci->devs[udev->slot_id]->in_ctx; |
d115b048 JY |
1442 | out_ctx = xhci->devs[udev->slot_id]->out_ctx; |
1443 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
f94e0186 | 1444 | ep_index = xhci_get_endpoint_index(&ep->desc); |
d115b048 | 1445 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
f94e0186 SS |
1446 | /* If the HC already knows the endpoint is disabled, |
1447 | * or the HCD has noted it is disabled, ignore this request | |
1448 | */ | |
f5960b69 ME |
1449 | if (((ep_ctx->ep_info & cpu_to_le32(EP_STATE_MASK)) == |
1450 | cpu_to_le32(EP_STATE_DISABLED)) || | |
28ccd296 ME |
1451 | le32_to_cpu(ctrl_ctx->drop_flags) & |
1452 | xhci_get_endpoint_flag(&ep->desc)) { | |
700e2052 GKH |
1453 | xhci_warn(xhci, "xHCI %s called with disabled ep %p\n", |
1454 | __func__, ep); | |
f94e0186 SS |
1455 | return 0; |
1456 | } | |
1457 | ||
28ccd296 ME |
1458 | ctrl_ctx->drop_flags |= cpu_to_le32(drop_flag); |
1459 | new_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags); | |
f94e0186 | 1460 | |
28ccd296 ME |
1461 | ctrl_ctx->add_flags &= cpu_to_le32(~drop_flag); |
1462 | new_add_flags = le32_to_cpu(ctrl_ctx->add_flags); | |
f94e0186 | 1463 | |
28ccd296 | 1464 | last_ctx = xhci_last_valid_endpoint(le32_to_cpu(ctrl_ctx->add_flags)); |
d115b048 | 1465 | slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); |
f94e0186 | 1466 | /* Update the last valid endpoint context, if we deleted the last one */ |
28ccd296 ME |
1467 | if ((le32_to_cpu(slot_ctx->dev_info) & LAST_CTX_MASK) > |
1468 | LAST_CTX(last_ctx)) { | |
1469 | slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); | |
1470 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(last_ctx)); | |
f94e0186 | 1471 | } |
28ccd296 | 1472 | new_slot_info = le32_to_cpu(slot_ctx->dev_info); |
f94e0186 SS |
1473 | |
1474 | xhci_endpoint_zero(xhci, xhci->devs[udev->slot_id], ep); | |
1475 | ||
f94e0186 SS |
1476 | xhci_dbg(xhci, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", |
1477 | (unsigned int) ep->desc.bEndpointAddress, | |
1478 | udev->slot_id, | |
1479 | (unsigned int) new_drop_flags, | |
1480 | (unsigned int) new_add_flags, | |
1481 | (unsigned int) new_slot_info); | |
1482 | return 0; | |
1483 | } | |
1484 | ||
1485 | /* Add an endpoint to a new possible bandwidth configuration for this device. | |
1486 | * Only one call to this function is allowed per endpoint before | |
1487 | * check_bandwidth() or reset_bandwidth() must be called. | |
1488 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will | |
1489 | * add the endpoint to the schedule with possibly new parameters denoted by a | |
1490 | * different endpoint descriptor in usb_host_endpoint. | |
1491 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is | |
1492 | * not allowed. | |
f88ba78d SS |
1493 | * |
1494 | * The USB core will not allow URBs to be queued to an endpoint until the | |
1495 | * configuration or alt setting is installed in the device, so there's no need | |
1496 | * for mutual exclusion to protect the xhci->devs[slot_id] structure. | |
f94e0186 SS |
1497 | */ |
1498 | int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, | |
1499 | struct usb_host_endpoint *ep) | |
1500 | { | |
f94e0186 | 1501 | struct xhci_hcd *xhci; |
d115b048 | 1502 | struct xhci_container_ctx *in_ctx, *out_ctx; |
f94e0186 SS |
1503 | unsigned int ep_index; |
1504 | struct xhci_ep_ctx *ep_ctx; | |
d115b048 JY |
1505 | struct xhci_slot_ctx *slot_ctx; |
1506 | struct xhci_input_control_ctx *ctrl_ctx; | |
f94e0186 SS |
1507 | u32 added_ctxs; |
1508 | unsigned int last_ctx; | |
1509 | u32 new_add_flags, new_drop_flags, new_slot_info; | |
fa75ac37 | 1510 | struct xhci_virt_device *virt_dev; |
f94e0186 SS |
1511 | int ret = 0; |
1512 | ||
64927730 | 1513 | ret = xhci_check_args(hcd, udev, ep, 1, true, __func__); |
a1587d97 SS |
1514 | if (ret <= 0) { |
1515 | /* So we won't queue a reset ep command for a root hub */ | |
1516 | ep->hcpriv = NULL; | |
f94e0186 | 1517 | return ret; |
a1587d97 | 1518 | } |
f94e0186 | 1519 | xhci = hcd_to_xhci(hcd); |
fe6c6c13 SS |
1520 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1521 | return -ENODEV; | |
f94e0186 SS |
1522 | |
1523 | added_ctxs = xhci_get_endpoint_flag(&ep->desc); | |
1524 | last_ctx = xhci_last_valid_endpoint(added_ctxs); | |
1525 | if (added_ctxs == SLOT_FLAG || added_ctxs == EP0_FLAG) { | |
1526 | /* FIXME when we have to issue an evaluate endpoint command to | |
1527 | * deal with ep0 max packet size changing once we get the | |
1528 | * descriptors | |
1529 | */ | |
1530 | xhci_dbg(xhci, "xHCI %s - can't add slot or ep 0 %#x\n", | |
1531 | __func__, added_ctxs); | |
1532 | return 0; | |
1533 | } | |
1534 | ||
fa75ac37 SS |
1535 | virt_dev = xhci->devs[udev->slot_id]; |
1536 | in_ctx = virt_dev->in_ctx; | |
1537 | out_ctx = virt_dev->out_ctx; | |
d115b048 | 1538 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); |
f94e0186 | 1539 | ep_index = xhci_get_endpoint_index(&ep->desc); |
d115b048 | 1540 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
fa75ac37 SS |
1541 | |
1542 | /* If this endpoint is already in use, and the upper layers are trying | |
1543 | * to add it again without dropping it, reject the addition. | |
1544 | */ | |
1545 | if (virt_dev->eps[ep_index].ring && | |
1546 | !(le32_to_cpu(ctrl_ctx->drop_flags) & | |
1547 | xhci_get_endpoint_flag(&ep->desc))) { | |
1548 | xhci_warn(xhci, "Trying to add endpoint 0x%x " | |
1549 | "without dropping it.\n", | |
1550 | (unsigned int) ep->desc.bEndpointAddress); | |
1551 | return -EINVAL; | |
1552 | } | |
1553 | ||
f94e0186 SS |
1554 | /* If the HCD has already noted the endpoint is enabled, |
1555 | * ignore this request. | |
1556 | */ | |
28ccd296 ME |
1557 | if (le32_to_cpu(ctrl_ctx->add_flags) & |
1558 | xhci_get_endpoint_flag(&ep->desc)) { | |
700e2052 GKH |
1559 | xhci_warn(xhci, "xHCI %s called with enabled ep %p\n", |
1560 | __func__, ep); | |
f94e0186 SS |
1561 | return 0; |
1562 | } | |
1563 | ||
f88ba78d SS |
1564 | /* |
1565 | * Configuration and alternate setting changes must be done in | |
1566 | * process context, not interrupt context (or so documenation | |
1567 | * for usb_set_interface() and usb_set_configuration() claim). | |
1568 | */ | |
fa75ac37 | 1569 | if (xhci_endpoint_init(xhci, virt_dev, udev, ep, GFP_NOIO) < 0) { |
f94e0186 SS |
1570 | dev_dbg(&udev->dev, "%s - could not initialize ep %#x\n", |
1571 | __func__, ep->desc.bEndpointAddress); | |
f94e0186 SS |
1572 | return -ENOMEM; |
1573 | } | |
1574 | ||
28ccd296 ME |
1575 | ctrl_ctx->add_flags |= cpu_to_le32(added_ctxs); |
1576 | new_add_flags = le32_to_cpu(ctrl_ctx->add_flags); | |
f94e0186 SS |
1577 | |
1578 | /* If xhci_endpoint_disable() was called for this endpoint, but the | |
1579 | * xHC hasn't been notified yet through the check_bandwidth() call, | |
1580 | * this re-adds a new state for the endpoint from the new endpoint | |
1581 | * descriptors. We must drop and re-add this endpoint, so we leave the | |
1582 | * drop flags alone. | |
1583 | */ | |
28ccd296 | 1584 | new_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags); |
f94e0186 | 1585 | |
d115b048 | 1586 | slot_ctx = xhci_get_slot_ctx(xhci, in_ctx); |
f94e0186 | 1587 | /* Update the last valid endpoint context, if we just added one past */ |
28ccd296 ME |
1588 | if ((le32_to_cpu(slot_ctx->dev_info) & LAST_CTX_MASK) < |
1589 | LAST_CTX(last_ctx)) { | |
1590 | slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); | |
1591 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(last_ctx)); | |
f94e0186 | 1592 | } |
28ccd296 | 1593 | new_slot_info = le32_to_cpu(slot_ctx->dev_info); |
f94e0186 | 1594 | |
a1587d97 SS |
1595 | /* Store the usb_device pointer for later use */ |
1596 | ep->hcpriv = udev; | |
1597 | ||
f94e0186 SS |
1598 | xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n", |
1599 | (unsigned int) ep->desc.bEndpointAddress, | |
1600 | udev->slot_id, | |
1601 | (unsigned int) new_drop_flags, | |
1602 | (unsigned int) new_add_flags, | |
1603 | (unsigned int) new_slot_info); | |
1604 | return 0; | |
1605 | } | |
1606 | ||
d115b048 | 1607 | static void xhci_zero_in_ctx(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev) |
f94e0186 | 1608 | { |
d115b048 | 1609 | struct xhci_input_control_ctx *ctrl_ctx; |
f94e0186 | 1610 | struct xhci_ep_ctx *ep_ctx; |
d115b048 | 1611 | struct xhci_slot_ctx *slot_ctx; |
f94e0186 SS |
1612 | int i; |
1613 | ||
1614 | /* When a device's add flag and drop flag are zero, any subsequent | |
1615 | * configure endpoint command will leave that endpoint's state | |
1616 | * untouched. Make sure we don't leave any old state in the input | |
1617 | * endpoint contexts. | |
1618 | */ | |
d115b048 JY |
1619 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
1620 | ctrl_ctx->drop_flags = 0; | |
1621 | ctrl_ctx->add_flags = 0; | |
1622 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); | |
28ccd296 | 1623 | slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); |
f94e0186 | 1624 | /* Endpoint 0 is always valid */ |
28ccd296 | 1625 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1)); |
f94e0186 | 1626 | for (i = 1; i < 31; ++i) { |
d115b048 | 1627 | ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, i); |
f94e0186 SS |
1628 | ep_ctx->ep_info = 0; |
1629 | ep_ctx->ep_info2 = 0; | |
8e595a5d | 1630 | ep_ctx->deq = 0; |
f94e0186 SS |
1631 | ep_ctx->tx_info = 0; |
1632 | } | |
1633 | } | |
1634 | ||
f2217e8e | 1635 | static int xhci_configure_endpoint_result(struct xhci_hcd *xhci, |
00161f7d | 1636 | struct usb_device *udev, u32 *cmd_status) |
f2217e8e SS |
1637 | { |
1638 | int ret; | |
1639 | ||
913a8a34 | 1640 | switch (*cmd_status) { |
f2217e8e SS |
1641 | case COMP_ENOMEM: |
1642 | dev_warn(&udev->dev, "Not enough host controller resources " | |
1643 | "for new device state.\n"); | |
1644 | ret = -ENOMEM; | |
1645 | /* FIXME: can we allocate more resources for the HC? */ | |
1646 | break; | |
1647 | case COMP_BW_ERR: | |
71d85724 | 1648 | case COMP_2ND_BW_ERR: |
f2217e8e SS |
1649 | dev_warn(&udev->dev, "Not enough bandwidth " |
1650 | "for new device state.\n"); | |
1651 | ret = -ENOSPC; | |
1652 | /* FIXME: can we go back to the old state? */ | |
1653 | break; | |
1654 | case COMP_TRB_ERR: | |
1655 | /* the HCD set up something wrong */ | |
1656 | dev_warn(&udev->dev, "ERROR: Endpoint drop flag = 0, " | |
1657 | "add flag = 1, " | |
1658 | "and endpoint is not disabled.\n"); | |
1659 | ret = -EINVAL; | |
1660 | break; | |
f6ba6fe2 AH |
1661 | case COMP_DEV_ERR: |
1662 | dev_warn(&udev->dev, "ERROR: Incompatible device for endpoint " | |
1663 | "configure command.\n"); | |
1664 | ret = -ENODEV; | |
1665 | break; | |
f2217e8e SS |
1666 | case COMP_SUCCESS: |
1667 | dev_dbg(&udev->dev, "Successful Endpoint Configure command\n"); | |
1668 | ret = 0; | |
1669 | break; | |
1670 | default: | |
1671 | xhci_err(xhci, "ERROR: unexpected command completion " | |
913a8a34 | 1672 | "code 0x%x.\n", *cmd_status); |
f2217e8e SS |
1673 | ret = -EINVAL; |
1674 | break; | |
1675 | } | |
1676 | return ret; | |
1677 | } | |
1678 | ||
1679 | static int xhci_evaluate_context_result(struct xhci_hcd *xhci, | |
00161f7d | 1680 | struct usb_device *udev, u32 *cmd_status) |
f2217e8e SS |
1681 | { |
1682 | int ret; | |
913a8a34 | 1683 | struct xhci_virt_device *virt_dev = xhci->devs[udev->slot_id]; |
f2217e8e | 1684 | |
913a8a34 | 1685 | switch (*cmd_status) { |
f2217e8e SS |
1686 | case COMP_EINVAL: |
1687 | dev_warn(&udev->dev, "WARN: xHCI driver setup invalid evaluate " | |
1688 | "context command.\n"); | |
1689 | ret = -EINVAL; | |
1690 | break; | |
1691 | case COMP_EBADSLT: | |
1692 | dev_warn(&udev->dev, "WARN: slot not enabled for" | |
1693 | "evaluate context command.\n"); | |
1694 | case COMP_CTX_STATE: | |
1695 | dev_warn(&udev->dev, "WARN: invalid context state for " | |
1696 | "evaluate context command.\n"); | |
1697 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 1); | |
1698 | ret = -EINVAL; | |
1699 | break; | |
f6ba6fe2 AH |
1700 | case COMP_DEV_ERR: |
1701 | dev_warn(&udev->dev, "ERROR: Incompatible device for evaluate " | |
1702 | "context command.\n"); | |
1703 | ret = -ENODEV; | |
1704 | break; | |
1bb73a88 AH |
1705 | case COMP_MEL_ERR: |
1706 | /* Max Exit Latency too large error */ | |
1707 | dev_warn(&udev->dev, "WARN: Max Exit Latency too large\n"); | |
1708 | ret = -EINVAL; | |
1709 | break; | |
f2217e8e SS |
1710 | case COMP_SUCCESS: |
1711 | dev_dbg(&udev->dev, "Successful evaluate context command\n"); | |
1712 | ret = 0; | |
1713 | break; | |
1714 | default: | |
1715 | xhci_err(xhci, "ERROR: unexpected command completion " | |
913a8a34 | 1716 | "code 0x%x.\n", *cmd_status); |
f2217e8e SS |
1717 | ret = -EINVAL; |
1718 | break; | |
1719 | } | |
1720 | return ret; | |
1721 | } | |
1722 | ||
2cf95c18 SS |
1723 | static u32 xhci_count_num_new_endpoints(struct xhci_hcd *xhci, |
1724 | struct xhci_container_ctx *in_ctx) | |
1725 | { | |
1726 | struct xhci_input_control_ctx *ctrl_ctx; | |
1727 | u32 valid_add_flags; | |
1728 | u32 valid_drop_flags; | |
1729 | ||
1730 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
1731 | /* Ignore the slot flag (bit 0), and the default control endpoint flag | |
1732 | * (bit 1). The default control endpoint is added during the Address | |
1733 | * Device command and is never removed until the slot is disabled. | |
1734 | */ | |
1735 | valid_add_flags = ctrl_ctx->add_flags >> 2; | |
1736 | valid_drop_flags = ctrl_ctx->drop_flags >> 2; | |
1737 | ||
1738 | /* Use hweight32 to count the number of ones in the add flags, or | |
1739 | * number of endpoints added. Don't count endpoints that are changed | |
1740 | * (both added and dropped). | |
1741 | */ | |
1742 | return hweight32(valid_add_flags) - | |
1743 | hweight32(valid_add_flags & valid_drop_flags); | |
1744 | } | |
1745 | ||
1746 | static unsigned int xhci_count_num_dropped_endpoints(struct xhci_hcd *xhci, | |
1747 | struct xhci_container_ctx *in_ctx) | |
1748 | { | |
1749 | struct xhci_input_control_ctx *ctrl_ctx; | |
1750 | u32 valid_add_flags; | |
1751 | u32 valid_drop_flags; | |
1752 | ||
1753 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
1754 | valid_add_flags = ctrl_ctx->add_flags >> 2; | |
1755 | valid_drop_flags = ctrl_ctx->drop_flags >> 2; | |
1756 | ||
1757 | return hweight32(valid_drop_flags) - | |
1758 | hweight32(valid_add_flags & valid_drop_flags); | |
1759 | } | |
1760 | ||
1761 | /* | |
1762 | * We need to reserve the new number of endpoints before the configure endpoint | |
1763 | * command completes. We can't subtract the dropped endpoints from the number | |
1764 | * of active endpoints until the command completes because we can oversubscribe | |
1765 | * the host in this case: | |
1766 | * | |
1767 | * - the first configure endpoint command drops more endpoints than it adds | |
1768 | * - a second configure endpoint command that adds more endpoints is queued | |
1769 | * - the first configure endpoint command fails, so the config is unchanged | |
1770 | * - the second command may succeed, even though there isn't enough resources | |
1771 | * | |
1772 | * Must be called with xhci->lock held. | |
1773 | */ | |
1774 | static int xhci_reserve_host_resources(struct xhci_hcd *xhci, | |
1775 | struct xhci_container_ctx *in_ctx) | |
1776 | { | |
1777 | u32 added_eps; | |
1778 | ||
1779 | added_eps = xhci_count_num_new_endpoints(xhci, in_ctx); | |
1780 | if (xhci->num_active_eps + added_eps > xhci->limit_active_eps) { | |
1781 | xhci_dbg(xhci, "Not enough ep ctxs: " | |
1782 | "%u active, need to add %u, limit is %u.\n", | |
1783 | xhci->num_active_eps, added_eps, | |
1784 | xhci->limit_active_eps); | |
1785 | return -ENOMEM; | |
1786 | } | |
1787 | xhci->num_active_eps += added_eps; | |
1788 | xhci_dbg(xhci, "Adding %u ep ctxs, %u now active.\n", added_eps, | |
1789 | xhci->num_active_eps); | |
1790 | return 0; | |
1791 | } | |
1792 | ||
1793 | /* | |
1794 | * The configure endpoint was failed by the xHC for some other reason, so we | |
1795 | * need to revert the resources that failed configuration would have used. | |
1796 | * | |
1797 | * Must be called with xhci->lock held. | |
1798 | */ | |
1799 | static void xhci_free_host_resources(struct xhci_hcd *xhci, | |
1800 | struct xhci_container_ctx *in_ctx) | |
1801 | { | |
1802 | u32 num_failed_eps; | |
1803 | ||
1804 | num_failed_eps = xhci_count_num_new_endpoints(xhci, in_ctx); | |
1805 | xhci->num_active_eps -= num_failed_eps; | |
1806 | xhci_dbg(xhci, "Removing %u failed ep ctxs, %u now active.\n", | |
1807 | num_failed_eps, | |
1808 | xhci->num_active_eps); | |
1809 | } | |
1810 | ||
1811 | /* | |
1812 | * Now that the command has completed, clean up the active endpoint count by | |
1813 | * subtracting out the endpoints that were dropped (but not changed). | |
1814 | * | |
1815 | * Must be called with xhci->lock held. | |
1816 | */ | |
1817 | static void xhci_finish_resource_reservation(struct xhci_hcd *xhci, | |
1818 | struct xhci_container_ctx *in_ctx) | |
1819 | { | |
1820 | u32 num_dropped_eps; | |
1821 | ||
1822 | num_dropped_eps = xhci_count_num_dropped_endpoints(xhci, in_ctx); | |
1823 | xhci->num_active_eps -= num_dropped_eps; | |
1824 | if (num_dropped_eps) | |
1825 | xhci_dbg(xhci, "Removing %u dropped ep ctxs, %u now active.\n", | |
1826 | num_dropped_eps, | |
1827 | xhci->num_active_eps); | |
1828 | } | |
1829 | ||
c29eea62 SS |
1830 | unsigned int xhci_get_block_size(struct usb_device *udev) |
1831 | { | |
1832 | switch (udev->speed) { | |
1833 | case USB_SPEED_LOW: | |
1834 | case USB_SPEED_FULL: | |
1835 | return FS_BLOCK; | |
1836 | case USB_SPEED_HIGH: | |
1837 | return HS_BLOCK; | |
1838 | case USB_SPEED_SUPER: | |
1839 | return SS_BLOCK; | |
1840 | case USB_SPEED_UNKNOWN: | |
1841 | case USB_SPEED_WIRELESS: | |
1842 | default: | |
1843 | /* Should never happen */ | |
1844 | return 1; | |
1845 | } | |
1846 | } | |
1847 | ||
1848 | unsigned int xhci_get_largest_overhead(struct xhci_interval_bw *interval_bw) | |
1849 | { | |
1850 | if (interval_bw->overhead[LS_OVERHEAD_TYPE]) | |
1851 | return LS_OVERHEAD; | |
1852 | if (interval_bw->overhead[FS_OVERHEAD_TYPE]) | |
1853 | return FS_OVERHEAD; | |
1854 | return HS_OVERHEAD; | |
1855 | } | |
1856 | ||
1857 | /* If we are changing a LS/FS device under a HS hub, | |
1858 | * make sure (if we are activating a new TT) that the HS bus has enough | |
1859 | * bandwidth for this new TT. | |
1860 | */ | |
1861 | static int xhci_check_tt_bw_table(struct xhci_hcd *xhci, | |
1862 | struct xhci_virt_device *virt_dev, | |
1863 | int old_active_eps) | |
1864 | { | |
1865 | struct xhci_interval_bw_table *bw_table; | |
1866 | struct xhci_tt_bw_info *tt_info; | |
1867 | ||
1868 | /* Find the bandwidth table for the root port this TT is attached to. */ | |
1869 | bw_table = &xhci->rh_bw[virt_dev->real_port - 1].bw_table; | |
1870 | tt_info = virt_dev->tt_info; | |
1871 | /* If this TT already had active endpoints, the bandwidth for this TT | |
1872 | * has already been added. Removing all periodic endpoints (and thus | |
1873 | * making the TT enactive) will only decrease the bandwidth used. | |
1874 | */ | |
1875 | if (old_active_eps) | |
1876 | return 0; | |
1877 | if (old_active_eps == 0 && tt_info->active_eps != 0) { | |
1878 | if (bw_table->bw_used + TT_HS_OVERHEAD > HS_BW_LIMIT) | |
1879 | return -ENOMEM; | |
1880 | return 0; | |
1881 | } | |
1882 | /* Not sure why we would have no new active endpoints... | |
1883 | * | |
1884 | * Maybe because of an Evaluate Context change for a hub update or a | |
1885 | * control endpoint 0 max packet size change? | |
1886 | * FIXME: skip the bandwidth calculation in that case. | |
1887 | */ | |
1888 | return 0; | |
1889 | } | |
1890 | ||
2b698999 SS |
1891 | static int xhci_check_ss_bw(struct xhci_hcd *xhci, |
1892 | struct xhci_virt_device *virt_dev) | |
1893 | { | |
1894 | unsigned int bw_reserved; | |
1895 | ||
1896 | bw_reserved = DIV_ROUND_UP(SS_BW_RESERVED*SS_BW_LIMIT_IN, 100); | |
1897 | if (virt_dev->bw_table->ss_bw_in > (SS_BW_LIMIT_IN - bw_reserved)) | |
1898 | return -ENOMEM; | |
1899 | ||
1900 | bw_reserved = DIV_ROUND_UP(SS_BW_RESERVED*SS_BW_LIMIT_OUT, 100); | |
1901 | if (virt_dev->bw_table->ss_bw_out > (SS_BW_LIMIT_OUT - bw_reserved)) | |
1902 | return -ENOMEM; | |
1903 | ||
1904 | return 0; | |
1905 | } | |
1906 | ||
c29eea62 SS |
1907 | /* |
1908 | * This algorithm is a very conservative estimate of the worst-case scheduling | |
1909 | * scenario for any one interval. The hardware dynamically schedules the | |
1910 | * packets, so we can't tell which microframe could be the limiting factor in | |
1911 | * the bandwidth scheduling. This only takes into account periodic endpoints. | |
1912 | * | |
1913 | * Obviously, we can't solve an NP complete problem to find the minimum worst | |
1914 | * case scenario. Instead, we come up with an estimate that is no less than | |
1915 | * the worst case bandwidth used for any one microframe, but may be an | |
1916 | * over-estimate. | |
1917 | * | |
1918 | * We walk the requirements for each endpoint by interval, starting with the | |
1919 | * smallest interval, and place packets in the schedule where there is only one | |
1920 | * possible way to schedule packets for that interval. In order to simplify | |
1921 | * this algorithm, we record the largest max packet size for each interval, and | |
1922 | * assume all packets will be that size. | |
1923 | * | |
1924 | * For interval 0, we obviously must schedule all packets for each interval. | |
1925 | * The bandwidth for interval 0 is just the amount of data to be transmitted | |
1926 | * (the sum of all max ESIT payload sizes, plus any overhead per packet times | |
1927 | * the number of packets). | |
1928 | * | |
1929 | * For interval 1, we have two possible microframes to schedule those packets | |
1930 | * in. For this algorithm, if we can schedule the same number of packets for | |
1931 | * each possible scheduling opportunity (each microframe), we will do so. The | |
1932 | * remaining number of packets will be saved to be transmitted in the gaps in | |
1933 | * the next interval's scheduling sequence. | |
1934 | * | |
1935 | * As we move those remaining packets to be scheduled with interval 2 packets, | |
1936 | * we have to double the number of remaining packets to transmit. This is | |
1937 | * because the intervals are actually powers of 2, and we would be transmitting | |
1938 | * the previous interval's packets twice in this interval. We also have to be | |
1939 | * sure that when we look at the largest max packet size for this interval, we | |
1940 | * also look at the largest max packet size for the remaining packets and take | |
1941 | * the greater of the two. | |
1942 | * | |
1943 | * The algorithm continues to evenly distribute packets in each scheduling | |
1944 | * opportunity, and push the remaining packets out, until we get to the last | |
1945 | * interval. Then those packets and their associated overhead are just added | |
1946 | * to the bandwidth used. | |
2e27980e SS |
1947 | */ |
1948 | static int xhci_check_bw_table(struct xhci_hcd *xhci, | |
1949 | struct xhci_virt_device *virt_dev, | |
1950 | int old_active_eps) | |
1951 | { | |
c29eea62 SS |
1952 | unsigned int bw_reserved; |
1953 | unsigned int max_bandwidth; | |
1954 | unsigned int bw_used; | |
1955 | unsigned int block_size; | |
1956 | struct xhci_interval_bw_table *bw_table; | |
1957 | unsigned int packet_size = 0; | |
1958 | unsigned int overhead = 0; | |
1959 | unsigned int packets_transmitted = 0; | |
1960 | unsigned int packets_remaining = 0; | |
1961 | unsigned int i; | |
1962 | ||
2b698999 SS |
1963 | if (virt_dev->udev->speed == USB_SPEED_SUPER) |
1964 | return xhci_check_ss_bw(xhci, virt_dev); | |
1965 | ||
c29eea62 SS |
1966 | if (virt_dev->udev->speed == USB_SPEED_HIGH) { |
1967 | max_bandwidth = HS_BW_LIMIT; | |
1968 | /* Convert percent of bus BW reserved to blocks reserved */ | |
1969 | bw_reserved = DIV_ROUND_UP(HS_BW_RESERVED * max_bandwidth, 100); | |
1970 | } else { | |
1971 | max_bandwidth = FS_BW_LIMIT; | |
1972 | bw_reserved = DIV_ROUND_UP(FS_BW_RESERVED * max_bandwidth, 100); | |
1973 | } | |
1974 | ||
1975 | bw_table = virt_dev->bw_table; | |
1976 | /* We need to translate the max packet size and max ESIT payloads into | |
1977 | * the units the hardware uses. | |
1978 | */ | |
1979 | block_size = xhci_get_block_size(virt_dev->udev); | |
1980 | ||
1981 | /* If we are manipulating a LS/FS device under a HS hub, double check | |
1982 | * that the HS bus has enough bandwidth if we are activing a new TT. | |
1983 | */ | |
1984 | if (virt_dev->tt_info) { | |
1985 | xhci_dbg(xhci, "Recalculating BW for rootport %u\n", | |
1986 | virt_dev->real_port); | |
1987 | if (xhci_check_tt_bw_table(xhci, virt_dev, old_active_eps)) { | |
1988 | xhci_warn(xhci, "Not enough bandwidth on HS bus for " | |
1989 | "newly activated TT.\n"); | |
1990 | return -ENOMEM; | |
1991 | } | |
1992 | xhci_dbg(xhci, "Recalculating BW for TT slot %u port %u\n", | |
1993 | virt_dev->tt_info->slot_id, | |
1994 | virt_dev->tt_info->ttport); | |
1995 | } else { | |
1996 | xhci_dbg(xhci, "Recalculating BW for rootport %u\n", | |
1997 | virt_dev->real_port); | |
1998 | } | |
1999 | ||
2000 | /* Add in how much bandwidth will be used for interval zero, or the | |
2001 | * rounded max ESIT payload + number of packets * largest overhead. | |
2002 | */ | |
2003 | bw_used = DIV_ROUND_UP(bw_table->interval0_esit_payload, block_size) + | |
2004 | bw_table->interval_bw[0].num_packets * | |
2005 | xhci_get_largest_overhead(&bw_table->interval_bw[0]); | |
2006 | ||
2007 | for (i = 1; i < XHCI_MAX_INTERVAL; i++) { | |
2008 | unsigned int bw_added; | |
2009 | unsigned int largest_mps; | |
2010 | unsigned int interval_overhead; | |
2011 | ||
2012 | /* | |
2013 | * How many packets could we transmit in this interval? | |
2014 | * If packets didn't fit in the previous interval, we will need | |
2015 | * to transmit that many packets twice within this interval. | |
2016 | */ | |
2017 | packets_remaining = 2 * packets_remaining + | |
2018 | bw_table->interval_bw[i].num_packets; | |
2019 | ||
2020 | /* Find the largest max packet size of this or the previous | |
2021 | * interval. | |
2022 | */ | |
2023 | if (list_empty(&bw_table->interval_bw[i].endpoints)) | |
2024 | largest_mps = 0; | |
2025 | else { | |
2026 | struct xhci_virt_ep *virt_ep; | |
2027 | struct list_head *ep_entry; | |
2028 | ||
2029 | ep_entry = bw_table->interval_bw[i].endpoints.next; | |
2030 | virt_ep = list_entry(ep_entry, | |
2031 | struct xhci_virt_ep, bw_endpoint_list); | |
2032 | /* Convert to blocks, rounding up */ | |
2033 | largest_mps = DIV_ROUND_UP( | |
2034 | virt_ep->bw_info.max_packet_size, | |
2035 | block_size); | |
2036 | } | |
2037 | if (largest_mps > packet_size) | |
2038 | packet_size = largest_mps; | |
2039 | ||
2040 | /* Use the larger overhead of this or the previous interval. */ | |
2041 | interval_overhead = xhci_get_largest_overhead( | |
2042 | &bw_table->interval_bw[i]); | |
2043 | if (interval_overhead > overhead) | |
2044 | overhead = interval_overhead; | |
2045 | ||
2046 | /* How many packets can we evenly distribute across | |
2047 | * (1 << (i + 1)) possible scheduling opportunities? | |
2048 | */ | |
2049 | packets_transmitted = packets_remaining >> (i + 1); | |
2050 | ||
2051 | /* Add in the bandwidth used for those scheduled packets */ | |
2052 | bw_added = packets_transmitted * (overhead + packet_size); | |
2053 | ||
2054 | /* How many packets do we have remaining to transmit? */ | |
2055 | packets_remaining = packets_remaining % (1 << (i + 1)); | |
2056 | ||
2057 | /* What largest max packet size should those packets have? */ | |
2058 | /* If we've transmitted all packets, don't carry over the | |
2059 | * largest packet size. | |
2060 | */ | |
2061 | if (packets_remaining == 0) { | |
2062 | packet_size = 0; | |
2063 | overhead = 0; | |
2064 | } else if (packets_transmitted > 0) { | |
2065 | /* Otherwise if we do have remaining packets, and we've | |
2066 | * scheduled some packets in this interval, take the | |
2067 | * largest max packet size from endpoints with this | |
2068 | * interval. | |
2069 | */ | |
2070 | packet_size = largest_mps; | |
2071 | overhead = interval_overhead; | |
2072 | } | |
2073 | /* Otherwise carry over packet_size and overhead from the last | |
2074 | * time we had a remainder. | |
2075 | */ | |
2076 | bw_used += bw_added; | |
2077 | if (bw_used > max_bandwidth) { | |
2078 | xhci_warn(xhci, "Not enough bandwidth. " | |
2079 | "Proposed: %u, Max: %u\n", | |
2080 | bw_used, max_bandwidth); | |
2081 | return -ENOMEM; | |
2082 | } | |
2083 | } | |
2084 | /* | |
2085 | * Ok, we know we have some packets left over after even-handedly | |
2086 | * scheduling interval 15. We don't know which microframes they will | |
2087 | * fit into, so we over-schedule and say they will be scheduled every | |
2088 | * microframe. | |
2089 | */ | |
2090 | if (packets_remaining > 0) | |
2091 | bw_used += overhead + packet_size; | |
2092 | ||
2093 | if (!virt_dev->tt_info && virt_dev->udev->speed == USB_SPEED_HIGH) { | |
2094 | unsigned int port_index = virt_dev->real_port - 1; | |
2095 | ||
2096 | /* OK, we're manipulating a HS device attached to a | |
2097 | * root port bandwidth domain. Include the number of active TTs | |
2098 | * in the bandwidth used. | |
2099 | */ | |
2100 | bw_used += TT_HS_OVERHEAD * | |
2101 | xhci->rh_bw[port_index].num_active_tts; | |
2102 | } | |
2103 | ||
2104 | xhci_dbg(xhci, "Final bandwidth: %u, Limit: %u, Reserved: %u, " | |
2105 | "Available: %u " "percent\n", | |
2106 | bw_used, max_bandwidth, bw_reserved, | |
2107 | (max_bandwidth - bw_used - bw_reserved) * 100 / | |
2108 | max_bandwidth); | |
2109 | ||
2110 | bw_used += bw_reserved; | |
2111 | if (bw_used > max_bandwidth) { | |
2112 | xhci_warn(xhci, "Not enough bandwidth. Proposed: %u, Max: %u\n", | |
2113 | bw_used, max_bandwidth); | |
2114 | return -ENOMEM; | |
2115 | } | |
2116 | ||
2117 | bw_table->bw_used = bw_used; | |
2e27980e SS |
2118 | return 0; |
2119 | } | |
2120 | ||
2121 | static bool xhci_is_async_ep(unsigned int ep_type) | |
2122 | { | |
2123 | return (ep_type != ISOC_OUT_EP && ep_type != INT_OUT_EP && | |
2124 | ep_type != ISOC_IN_EP && | |
2125 | ep_type != INT_IN_EP); | |
2126 | } | |
2127 | ||
2b698999 SS |
2128 | static bool xhci_is_sync_in_ep(unsigned int ep_type) |
2129 | { | |
2130 | return (ep_type == ISOC_IN_EP || ep_type != INT_IN_EP); | |
2131 | } | |
2132 | ||
2133 | static unsigned int xhci_get_ss_bw_consumed(struct xhci_bw_info *ep_bw) | |
2134 | { | |
2135 | unsigned int mps = DIV_ROUND_UP(ep_bw->max_packet_size, SS_BLOCK); | |
2136 | ||
2137 | if (ep_bw->ep_interval == 0) | |
2138 | return SS_OVERHEAD_BURST + | |
2139 | (ep_bw->mult * ep_bw->num_packets * | |
2140 | (SS_OVERHEAD + mps)); | |
2141 | return DIV_ROUND_UP(ep_bw->mult * ep_bw->num_packets * | |
2142 | (SS_OVERHEAD + mps + SS_OVERHEAD_BURST), | |
2143 | 1 << ep_bw->ep_interval); | |
2144 | ||
2145 | } | |
2146 | ||
2e27980e SS |
2147 | void xhci_drop_ep_from_interval_table(struct xhci_hcd *xhci, |
2148 | struct xhci_bw_info *ep_bw, | |
2149 | struct xhci_interval_bw_table *bw_table, | |
2150 | struct usb_device *udev, | |
2151 | struct xhci_virt_ep *virt_ep, | |
2152 | struct xhci_tt_bw_info *tt_info) | |
2153 | { | |
2154 | struct xhci_interval_bw *interval_bw; | |
2155 | int normalized_interval; | |
2156 | ||
2b698999 | 2157 | if (xhci_is_async_ep(ep_bw->type)) |
2e27980e SS |
2158 | return; |
2159 | ||
2b698999 SS |
2160 | if (udev->speed == USB_SPEED_SUPER) { |
2161 | if (xhci_is_sync_in_ep(ep_bw->type)) | |
2162 | xhci->devs[udev->slot_id]->bw_table->ss_bw_in -= | |
2163 | xhci_get_ss_bw_consumed(ep_bw); | |
2164 | else | |
2165 | xhci->devs[udev->slot_id]->bw_table->ss_bw_out -= | |
2166 | xhci_get_ss_bw_consumed(ep_bw); | |
2167 | return; | |
2168 | } | |
2169 | ||
2170 | /* SuperSpeed endpoints never get added to intervals in the table, so | |
2171 | * this check is only valid for HS/FS/LS devices. | |
2172 | */ | |
2173 | if (list_empty(&virt_ep->bw_endpoint_list)) | |
2174 | return; | |
2e27980e SS |
2175 | /* For LS/FS devices, we need to translate the interval expressed in |
2176 | * microframes to frames. | |
2177 | */ | |
2178 | if (udev->speed == USB_SPEED_HIGH) | |
2179 | normalized_interval = ep_bw->ep_interval; | |
2180 | else | |
2181 | normalized_interval = ep_bw->ep_interval - 3; | |
2182 | ||
2183 | if (normalized_interval == 0) | |
2184 | bw_table->interval0_esit_payload -= ep_bw->max_esit_payload; | |
2185 | interval_bw = &bw_table->interval_bw[normalized_interval]; | |
2186 | interval_bw->num_packets -= ep_bw->num_packets; | |
2187 | switch (udev->speed) { | |
2188 | case USB_SPEED_LOW: | |
2189 | interval_bw->overhead[LS_OVERHEAD_TYPE] -= 1; | |
2190 | break; | |
2191 | case USB_SPEED_FULL: | |
2192 | interval_bw->overhead[FS_OVERHEAD_TYPE] -= 1; | |
2193 | break; | |
2194 | case USB_SPEED_HIGH: | |
2195 | interval_bw->overhead[HS_OVERHEAD_TYPE] -= 1; | |
2196 | break; | |
2197 | case USB_SPEED_SUPER: | |
2198 | case USB_SPEED_UNKNOWN: | |
2199 | case USB_SPEED_WIRELESS: | |
2200 | /* Should never happen because only LS/FS/HS endpoints will get | |
2201 | * added to the endpoint list. | |
2202 | */ | |
2203 | return; | |
2204 | } | |
2205 | if (tt_info) | |
2206 | tt_info->active_eps -= 1; | |
2207 | list_del_init(&virt_ep->bw_endpoint_list); | |
2208 | } | |
2209 | ||
2210 | static void xhci_add_ep_to_interval_table(struct xhci_hcd *xhci, | |
2211 | struct xhci_bw_info *ep_bw, | |
2212 | struct xhci_interval_bw_table *bw_table, | |
2213 | struct usb_device *udev, | |
2214 | struct xhci_virt_ep *virt_ep, | |
2215 | struct xhci_tt_bw_info *tt_info) | |
2216 | { | |
2217 | struct xhci_interval_bw *interval_bw; | |
2218 | struct xhci_virt_ep *smaller_ep; | |
2219 | int normalized_interval; | |
2220 | ||
2221 | if (xhci_is_async_ep(ep_bw->type)) | |
2222 | return; | |
2223 | ||
2b698999 SS |
2224 | if (udev->speed == USB_SPEED_SUPER) { |
2225 | if (xhci_is_sync_in_ep(ep_bw->type)) | |
2226 | xhci->devs[udev->slot_id]->bw_table->ss_bw_in += | |
2227 | xhci_get_ss_bw_consumed(ep_bw); | |
2228 | else | |
2229 | xhci->devs[udev->slot_id]->bw_table->ss_bw_out += | |
2230 | xhci_get_ss_bw_consumed(ep_bw); | |
2231 | return; | |
2232 | } | |
2233 | ||
2e27980e SS |
2234 | /* For LS/FS devices, we need to translate the interval expressed in |
2235 | * microframes to frames. | |
2236 | */ | |
2237 | if (udev->speed == USB_SPEED_HIGH) | |
2238 | normalized_interval = ep_bw->ep_interval; | |
2239 | else | |
2240 | normalized_interval = ep_bw->ep_interval - 3; | |
2241 | ||
2242 | if (normalized_interval == 0) | |
2243 | bw_table->interval0_esit_payload += ep_bw->max_esit_payload; | |
2244 | interval_bw = &bw_table->interval_bw[normalized_interval]; | |
2245 | interval_bw->num_packets += ep_bw->num_packets; | |
2246 | switch (udev->speed) { | |
2247 | case USB_SPEED_LOW: | |
2248 | interval_bw->overhead[LS_OVERHEAD_TYPE] += 1; | |
2249 | break; | |
2250 | case USB_SPEED_FULL: | |
2251 | interval_bw->overhead[FS_OVERHEAD_TYPE] += 1; | |
2252 | break; | |
2253 | case USB_SPEED_HIGH: | |
2254 | interval_bw->overhead[HS_OVERHEAD_TYPE] += 1; | |
2255 | break; | |
2256 | case USB_SPEED_SUPER: | |
2257 | case USB_SPEED_UNKNOWN: | |
2258 | case USB_SPEED_WIRELESS: | |
2259 | /* Should never happen because only LS/FS/HS endpoints will get | |
2260 | * added to the endpoint list. | |
2261 | */ | |
2262 | return; | |
2263 | } | |
2264 | ||
2265 | if (tt_info) | |
2266 | tt_info->active_eps += 1; | |
2267 | /* Insert the endpoint into the list, largest max packet size first. */ | |
2268 | list_for_each_entry(smaller_ep, &interval_bw->endpoints, | |
2269 | bw_endpoint_list) { | |
2270 | if (ep_bw->max_packet_size >= | |
2271 | smaller_ep->bw_info.max_packet_size) { | |
2272 | /* Add the new ep before the smaller endpoint */ | |
2273 | list_add_tail(&virt_ep->bw_endpoint_list, | |
2274 | &smaller_ep->bw_endpoint_list); | |
2275 | return; | |
2276 | } | |
2277 | } | |
2278 | /* Add the new endpoint at the end of the list. */ | |
2279 | list_add_tail(&virt_ep->bw_endpoint_list, | |
2280 | &interval_bw->endpoints); | |
2281 | } | |
2282 | ||
2283 | void xhci_update_tt_active_eps(struct xhci_hcd *xhci, | |
2284 | struct xhci_virt_device *virt_dev, | |
2285 | int old_active_eps) | |
2286 | { | |
2287 | struct xhci_root_port_bw_info *rh_bw_info; | |
2288 | if (!virt_dev->tt_info) | |
2289 | return; | |
2290 | ||
2291 | rh_bw_info = &xhci->rh_bw[virt_dev->real_port - 1]; | |
2292 | if (old_active_eps == 0 && | |
2293 | virt_dev->tt_info->active_eps != 0) { | |
2294 | rh_bw_info->num_active_tts += 1; | |
c29eea62 | 2295 | rh_bw_info->bw_table.bw_used += TT_HS_OVERHEAD; |
2e27980e SS |
2296 | } else if (old_active_eps != 0 && |
2297 | virt_dev->tt_info->active_eps == 0) { | |
2298 | rh_bw_info->num_active_tts -= 1; | |
c29eea62 | 2299 | rh_bw_info->bw_table.bw_used -= TT_HS_OVERHEAD; |
2e27980e SS |
2300 | } |
2301 | } | |
2302 | ||
2303 | static int xhci_reserve_bandwidth(struct xhci_hcd *xhci, | |
2304 | struct xhci_virt_device *virt_dev, | |
2305 | struct xhci_container_ctx *in_ctx) | |
2306 | { | |
2307 | struct xhci_bw_info ep_bw_info[31]; | |
2308 | int i; | |
2309 | struct xhci_input_control_ctx *ctrl_ctx; | |
2310 | int old_active_eps = 0; | |
2311 | ||
2e27980e SS |
2312 | if (virt_dev->tt_info) |
2313 | old_active_eps = virt_dev->tt_info->active_eps; | |
2314 | ||
2315 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); | |
2316 | ||
2317 | for (i = 0; i < 31; i++) { | |
2318 | if (!EP_IS_ADDED(ctrl_ctx, i) && !EP_IS_DROPPED(ctrl_ctx, i)) | |
2319 | continue; | |
2320 | ||
2321 | /* Make a copy of the BW info in case we need to revert this */ | |
2322 | memcpy(&ep_bw_info[i], &virt_dev->eps[i].bw_info, | |
2323 | sizeof(ep_bw_info[i])); | |
2324 | /* Drop the endpoint from the interval table if the endpoint is | |
2325 | * being dropped or changed. | |
2326 | */ | |
2327 | if (EP_IS_DROPPED(ctrl_ctx, i)) | |
2328 | xhci_drop_ep_from_interval_table(xhci, | |
2329 | &virt_dev->eps[i].bw_info, | |
2330 | virt_dev->bw_table, | |
2331 | virt_dev->udev, | |
2332 | &virt_dev->eps[i], | |
2333 | virt_dev->tt_info); | |
2334 | } | |
2335 | /* Overwrite the information stored in the endpoints' bw_info */ | |
2336 | xhci_update_bw_info(xhci, virt_dev->in_ctx, ctrl_ctx, virt_dev); | |
2337 | for (i = 0; i < 31; i++) { | |
2338 | /* Add any changed or added endpoints to the interval table */ | |
2339 | if (EP_IS_ADDED(ctrl_ctx, i)) | |
2340 | xhci_add_ep_to_interval_table(xhci, | |
2341 | &virt_dev->eps[i].bw_info, | |
2342 | virt_dev->bw_table, | |
2343 | virt_dev->udev, | |
2344 | &virt_dev->eps[i], | |
2345 | virt_dev->tt_info); | |
2346 | } | |
2347 | ||
2348 | if (!xhci_check_bw_table(xhci, virt_dev, old_active_eps)) { | |
2349 | /* Ok, this fits in the bandwidth we have. | |
2350 | * Update the number of active TTs. | |
2351 | */ | |
2352 | xhci_update_tt_active_eps(xhci, virt_dev, old_active_eps); | |
2353 | return 0; | |
2354 | } | |
2355 | ||
2356 | /* We don't have enough bandwidth for this, revert the stored info. */ | |
2357 | for (i = 0; i < 31; i++) { | |
2358 | if (!EP_IS_ADDED(ctrl_ctx, i) && !EP_IS_DROPPED(ctrl_ctx, i)) | |
2359 | continue; | |
2360 | ||
2361 | /* Drop the new copies of any added or changed endpoints from | |
2362 | * the interval table. | |
2363 | */ | |
2364 | if (EP_IS_ADDED(ctrl_ctx, i)) { | |
2365 | xhci_drop_ep_from_interval_table(xhci, | |
2366 | &virt_dev->eps[i].bw_info, | |
2367 | virt_dev->bw_table, | |
2368 | virt_dev->udev, | |
2369 | &virt_dev->eps[i], | |
2370 | virt_dev->tt_info); | |
2371 | } | |
2372 | /* Revert the endpoint back to its old information */ | |
2373 | memcpy(&virt_dev->eps[i].bw_info, &ep_bw_info[i], | |
2374 | sizeof(ep_bw_info[i])); | |
2375 | /* Add any changed or dropped endpoints back into the table */ | |
2376 | if (EP_IS_DROPPED(ctrl_ctx, i)) | |
2377 | xhci_add_ep_to_interval_table(xhci, | |
2378 | &virt_dev->eps[i].bw_info, | |
2379 | virt_dev->bw_table, | |
2380 | virt_dev->udev, | |
2381 | &virt_dev->eps[i], | |
2382 | virt_dev->tt_info); | |
2383 | } | |
2384 | return -ENOMEM; | |
2385 | } | |
2386 | ||
2387 | ||
f2217e8e SS |
2388 | /* Issue a configure endpoint command or evaluate context command |
2389 | * and wait for it to finish. | |
2390 | */ | |
2391 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, | |
913a8a34 SS |
2392 | struct usb_device *udev, |
2393 | struct xhci_command *command, | |
2394 | bool ctx_change, bool must_succeed) | |
f2217e8e SS |
2395 | { |
2396 | int ret; | |
2397 | int timeleft; | |
2398 | unsigned long flags; | |
913a8a34 SS |
2399 | struct xhci_container_ctx *in_ctx; |
2400 | struct completion *cmd_completion; | |
28ccd296 | 2401 | u32 *cmd_status; |
913a8a34 | 2402 | struct xhci_virt_device *virt_dev; |
f2217e8e SS |
2403 | |
2404 | spin_lock_irqsave(&xhci->lock, flags); | |
913a8a34 | 2405 | virt_dev = xhci->devs[udev->slot_id]; |
750645f8 SS |
2406 | |
2407 | if (command) | |
913a8a34 | 2408 | in_ctx = command->in_ctx; |
750645f8 SS |
2409 | else |
2410 | in_ctx = virt_dev->in_ctx; | |
2cf95c18 | 2411 | |
750645f8 SS |
2412 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK) && |
2413 | xhci_reserve_host_resources(xhci, in_ctx)) { | |
2414 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2415 | xhci_warn(xhci, "Not enough host resources, " | |
2416 | "active endpoint contexts = %u\n", | |
2417 | xhci->num_active_eps); | |
2418 | return -ENOMEM; | |
2419 | } | |
2e27980e SS |
2420 | if ((xhci->quirks & XHCI_SW_BW_CHECKING) && |
2421 | xhci_reserve_bandwidth(xhci, virt_dev, in_ctx)) { | |
2422 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) | |
2423 | xhci_free_host_resources(xhci, in_ctx); | |
2424 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2425 | xhci_warn(xhci, "Not enough bandwidth\n"); | |
2426 | return -ENOMEM; | |
2427 | } | |
750645f8 SS |
2428 | |
2429 | if (command) { | |
913a8a34 SS |
2430 | cmd_completion = command->completion; |
2431 | cmd_status = &command->status; | |
2432 | command->command_trb = xhci->cmd_ring->enqueue; | |
7a3783ef PZ |
2433 | |
2434 | /* Enqueue pointer can be left pointing to the link TRB, | |
2435 | * we must handle that | |
2436 | */ | |
f5960b69 | 2437 | if (TRB_TYPE_LINK_LE32(command->command_trb->link.control)) |
7a3783ef PZ |
2438 | command->command_trb = |
2439 | xhci->cmd_ring->enq_seg->next->trbs; | |
2440 | ||
913a8a34 SS |
2441 | list_add_tail(&command->cmd_list, &virt_dev->cmd_list); |
2442 | } else { | |
913a8a34 SS |
2443 | cmd_completion = &virt_dev->cmd_completion; |
2444 | cmd_status = &virt_dev->cmd_status; | |
2445 | } | |
1d68064a | 2446 | init_completion(cmd_completion); |
913a8a34 | 2447 | |
f2217e8e | 2448 | if (!ctx_change) |
913a8a34 SS |
2449 | ret = xhci_queue_configure_endpoint(xhci, in_ctx->dma, |
2450 | udev->slot_id, must_succeed); | |
f2217e8e | 2451 | else |
913a8a34 | 2452 | ret = xhci_queue_evaluate_context(xhci, in_ctx->dma, |
4b266541 | 2453 | udev->slot_id, must_succeed); |
f2217e8e | 2454 | if (ret < 0) { |
c01591bd SS |
2455 | if (command) |
2456 | list_del(&command->cmd_list); | |
2cf95c18 SS |
2457 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) |
2458 | xhci_free_host_resources(xhci, in_ctx); | |
f2217e8e SS |
2459 | spin_unlock_irqrestore(&xhci->lock, flags); |
2460 | xhci_dbg(xhci, "FIXME allocate a new ring segment\n"); | |
2461 | return -ENOMEM; | |
2462 | } | |
2463 | xhci_ring_cmd_db(xhci); | |
2464 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2465 | ||
2466 | /* Wait for the configure endpoint command to complete */ | |
2467 | timeleft = wait_for_completion_interruptible_timeout( | |
913a8a34 | 2468 | cmd_completion, |
f2217e8e SS |
2469 | USB_CTRL_SET_TIMEOUT); |
2470 | if (timeleft <= 0) { | |
2471 | xhci_warn(xhci, "%s while waiting for %s command\n", | |
2472 | timeleft == 0 ? "Timeout" : "Signal", | |
2473 | ctx_change == 0 ? | |
2474 | "configure endpoint" : | |
2475 | "evaluate context"); | |
2476 | /* FIXME cancel the configure endpoint command */ | |
2477 | return -ETIME; | |
2478 | } | |
2479 | ||
2480 | if (!ctx_change) | |
2cf95c18 SS |
2481 | ret = xhci_configure_endpoint_result(xhci, udev, cmd_status); |
2482 | else | |
2483 | ret = xhci_evaluate_context_result(xhci, udev, cmd_status); | |
2484 | ||
2485 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { | |
2486 | spin_lock_irqsave(&xhci->lock, flags); | |
2487 | /* If the command failed, remove the reserved resources. | |
2488 | * Otherwise, clean up the estimate to include dropped eps. | |
2489 | */ | |
2490 | if (ret) | |
2491 | xhci_free_host_resources(xhci, in_ctx); | |
2492 | else | |
2493 | xhci_finish_resource_reservation(xhci, in_ctx); | |
2494 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2495 | } | |
2496 | return ret; | |
f2217e8e SS |
2497 | } |
2498 | ||
f88ba78d SS |
2499 | /* Called after one or more calls to xhci_add_endpoint() or |
2500 | * xhci_drop_endpoint(). If this call fails, the USB core is expected | |
2501 | * to call xhci_reset_bandwidth(). | |
2502 | * | |
2503 | * Since we are in the middle of changing either configuration or | |
2504 | * installing a new alt setting, the USB core won't allow URBs to be | |
2505 | * enqueued for any endpoint on the old config or interface. Nothing | |
2506 | * else should be touching the xhci->devs[slot_id] structure, so we | |
2507 | * don't need to take the xhci->lock for manipulating that. | |
2508 | */ | |
f94e0186 SS |
2509 | int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) |
2510 | { | |
2511 | int i; | |
2512 | int ret = 0; | |
f94e0186 SS |
2513 | struct xhci_hcd *xhci; |
2514 | struct xhci_virt_device *virt_dev; | |
d115b048 JY |
2515 | struct xhci_input_control_ctx *ctrl_ctx; |
2516 | struct xhci_slot_ctx *slot_ctx; | |
f94e0186 | 2517 | |
64927730 | 2518 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
f94e0186 SS |
2519 | if (ret <= 0) |
2520 | return ret; | |
2521 | xhci = hcd_to_xhci(hcd); | |
fe6c6c13 SS |
2522 | if (xhci->xhc_state & XHCI_STATE_DYING) |
2523 | return -ENODEV; | |
f94e0186 | 2524 | |
700e2052 | 2525 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
2526 | virt_dev = xhci->devs[udev->slot_id]; |
2527 | ||
2528 | /* See section 4.6.6 - A0 = 1; A1 = D0 = D1 = 0 */ | |
d115b048 | 2529 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
28ccd296 ME |
2530 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
2531 | ctrl_ctx->add_flags &= cpu_to_le32(~EP0_FLAG); | |
2532 | ctrl_ctx->drop_flags &= cpu_to_le32(~(SLOT_FLAG | EP0_FLAG)); | |
2dc37539 SS |
2533 | |
2534 | /* Don't issue the command if there's no endpoints to update. */ | |
2535 | if (ctrl_ctx->add_flags == cpu_to_le32(SLOT_FLAG) && | |
2536 | ctrl_ctx->drop_flags == 0) | |
2537 | return 0; | |
2538 | ||
f94e0186 | 2539 | xhci_dbg(xhci, "New Input Control Context:\n"); |
d115b048 JY |
2540 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
2541 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, | |
28ccd296 | 2542 | LAST_CTX_TO_EP_NUM(le32_to_cpu(slot_ctx->dev_info))); |
f94e0186 | 2543 | |
913a8a34 SS |
2544 | ret = xhci_configure_endpoint(xhci, udev, NULL, |
2545 | false, false); | |
f94e0186 SS |
2546 | if (ret) { |
2547 | /* Callee should call reset_bandwidth() */ | |
f94e0186 SS |
2548 | return ret; |
2549 | } | |
2550 | ||
2551 | xhci_dbg(xhci, "Output context after successful config ep cmd:\n"); | |
d115b048 | 2552 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, |
28ccd296 | 2553 | LAST_CTX_TO_EP_NUM(le32_to_cpu(slot_ctx->dev_info))); |
f94e0186 | 2554 | |
834cb0fc SS |
2555 | /* Free any rings that were dropped, but not changed. */ |
2556 | for (i = 1; i < 31; ++i) { | |
4819fef5 ME |
2557 | if ((le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1))) && |
2558 | !(le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1)))) | |
834cb0fc SS |
2559 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); |
2560 | } | |
d115b048 | 2561 | xhci_zero_in_ctx(xhci, virt_dev); |
834cb0fc SS |
2562 | /* |
2563 | * Install any rings for completely new endpoints or changed endpoints, | |
2564 | * and free or cache any old rings from changed endpoints. | |
2565 | */ | |
f94e0186 | 2566 | for (i = 1; i < 31; ++i) { |
74f9fe21 SS |
2567 | if (!virt_dev->eps[i].new_ring) |
2568 | continue; | |
2569 | /* Only cache or free the old ring if it exists. | |
2570 | * It may not if this is the first add of an endpoint. | |
2571 | */ | |
2572 | if (virt_dev->eps[i].ring) { | |
412566bd | 2573 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); |
f94e0186 | 2574 | } |
74f9fe21 SS |
2575 | virt_dev->eps[i].ring = virt_dev->eps[i].new_ring; |
2576 | virt_dev->eps[i].new_ring = NULL; | |
f94e0186 SS |
2577 | } |
2578 | ||
f94e0186 SS |
2579 | return ret; |
2580 | } | |
2581 | ||
2582 | void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) | |
2583 | { | |
f94e0186 SS |
2584 | struct xhci_hcd *xhci; |
2585 | struct xhci_virt_device *virt_dev; | |
2586 | int i, ret; | |
2587 | ||
64927730 | 2588 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
f94e0186 SS |
2589 | if (ret <= 0) |
2590 | return; | |
2591 | xhci = hcd_to_xhci(hcd); | |
2592 | ||
700e2052 | 2593 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
2594 | virt_dev = xhci->devs[udev->slot_id]; |
2595 | /* Free any rings allocated for added endpoints */ | |
2596 | for (i = 0; i < 31; ++i) { | |
63a0d9ab SS |
2597 | if (virt_dev->eps[i].new_ring) { |
2598 | xhci_ring_free(xhci, virt_dev->eps[i].new_ring); | |
2599 | virt_dev->eps[i].new_ring = NULL; | |
f94e0186 SS |
2600 | } |
2601 | } | |
d115b048 | 2602 | xhci_zero_in_ctx(xhci, virt_dev); |
f94e0186 SS |
2603 | } |
2604 | ||
5270b951 | 2605 | static void xhci_setup_input_ctx_for_config_ep(struct xhci_hcd *xhci, |
913a8a34 SS |
2606 | struct xhci_container_ctx *in_ctx, |
2607 | struct xhci_container_ctx *out_ctx, | |
2608 | u32 add_flags, u32 drop_flags) | |
5270b951 SS |
2609 | { |
2610 | struct xhci_input_control_ctx *ctrl_ctx; | |
913a8a34 | 2611 | ctrl_ctx = xhci_get_input_control_ctx(xhci, in_ctx); |
28ccd296 ME |
2612 | ctrl_ctx->add_flags = cpu_to_le32(add_flags); |
2613 | ctrl_ctx->drop_flags = cpu_to_le32(drop_flags); | |
913a8a34 | 2614 | xhci_slot_copy(xhci, in_ctx, out_ctx); |
28ccd296 | 2615 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
5270b951 | 2616 | |
913a8a34 SS |
2617 | xhci_dbg(xhci, "Input Context:\n"); |
2618 | xhci_dbg_ctx(xhci, in_ctx, xhci_last_valid_endpoint(add_flags)); | |
5270b951 SS |
2619 | } |
2620 | ||
8212a49d | 2621 | static void xhci_setup_input_ctx_for_quirk(struct xhci_hcd *xhci, |
ac9d8fe7 SS |
2622 | unsigned int slot_id, unsigned int ep_index, |
2623 | struct xhci_dequeue_state *deq_state) | |
2624 | { | |
2625 | struct xhci_container_ctx *in_ctx; | |
ac9d8fe7 SS |
2626 | struct xhci_ep_ctx *ep_ctx; |
2627 | u32 added_ctxs; | |
2628 | dma_addr_t addr; | |
2629 | ||
913a8a34 SS |
2630 | xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, |
2631 | xhci->devs[slot_id]->out_ctx, ep_index); | |
ac9d8fe7 SS |
2632 | in_ctx = xhci->devs[slot_id]->in_ctx; |
2633 | ep_ctx = xhci_get_ep_ctx(xhci, in_ctx, ep_index); | |
2634 | addr = xhci_trb_virt_to_dma(deq_state->new_deq_seg, | |
2635 | deq_state->new_deq_ptr); | |
2636 | if (addr == 0) { | |
2637 | xhci_warn(xhci, "WARN Cannot submit config ep after " | |
2638 | "reset ep command\n"); | |
2639 | xhci_warn(xhci, "WARN deq seg = %p, deq ptr = %p\n", | |
2640 | deq_state->new_deq_seg, | |
2641 | deq_state->new_deq_ptr); | |
2642 | return; | |
2643 | } | |
28ccd296 | 2644 | ep_ctx->deq = cpu_to_le64(addr | deq_state->new_cycle_state); |
ac9d8fe7 | 2645 | |
ac9d8fe7 | 2646 | added_ctxs = xhci_get_endpoint_flag_from_index(ep_index); |
913a8a34 SS |
2647 | xhci_setup_input_ctx_for_config_ep(xhci, xhci->devs[slot_id]->in_ctx, |
2648 | xhci->devs[slot_id]->out_ctx, added_ctxs, added_ctxs); | |
ac9d8fe7 SS |
2649 | } |
2650 | ||
82d1009f | 2651 | void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci, |
63a0d9ab | 2652 | struct usb_device *udev, unsigned int ep_index) |
82d1009f SS |
2653 | { |
2654 | struct xhci_dequeue_state deq_state; | |
63a0d9ab | 2655 | struct xhci_virt_ep *ep; |
82d1009f SS |
2656 | |
2657 | xhci_dbg(xhci, "Cleaning up stalled endpoint ring\n"); | |
63a0d9ab | 2658 | ep = &xhci->devs[udev->slot_id]->eps[ep_index]; |
82d1009f SS |
2659 | /* We need to move the HW's dequeue pointer past this TD, |
2660 | * or it will attempt to resend it on the next doorbell ring. | |
2661 | */ | |
2662 | xhci_find_new_dequeue_state(xhci, udev->slot_id, | |
e9df17eb | 2663 | ep_index, ep->stopped_stream, ep->stopped_td, |
ac9d8fe7 | 2664 | &deq_state); |
82d1009f | 2665 | |
ac9d8fe7 SS |
2666 | /* HW with the reset endpoint quirk will use the saved dequeue state to |
2667 | * issue a configure endpoint command later. | |
2668 | */ | |
2669 | if (!(xhci->quirks & XHCI_RESET_EP_QUIRK)) { | |
2670 | xhci_dbg(xhci, "Queueing new dequeue state\n"); | |
63a0d9ab | 2671 | xhci_queue_new_dequeue_state(xhci, udev->slot_id, |
e9df17eb | 2672 | ep_index, ep->stopped_stream, &deq_state); |
ac9d8fe7 SS |
2673 | } else { |
2674 | /* Better hope no one uses the input context between now and the | |
2675 | * reset endpoint completion! | |
e9df17eb SS |
2676 | * XXX: No idea how this hardware will react when stream rings |
2677 | * are enabled. | |
ac9d8fe7 SS |
2678 | */ |
2679 | xhci_dbg(xhci, "Setting up input context for " | |
2680 | "configure endpoint command\n"); | |
2681 | xhci_setup_input_ctx_for_quirk(xhci, udev->slot_id, | |
2682 | ep_index, &deq_state); | |
2683 | } | |
82d1009f SS |
2684 | } |
2685 | ||
a1587d97 SS |
2686 | /* Deal with stalled endpoints. The core should have sent the control message |
2687 | * to clear the halt condition. However, we need to make the xHCI hardware | |
2688 | * reset its sequence number, since a device will expect a sequence number of | |
2689 | * zero after the halt condition is cleared. | |
2690 | * Context: in_interrupt | |
2691 | */ | |
2692 | void xhci_endpoint_reset(struct usb_hcd *hcd, | |
2693 | struct usb_host_endpoint *ep) | |
2694 | { | |
2695 | struct xhci_hcd *xhci; | |
2696 | struct usb_device *udev; | |
2697 | unsigned int ep_index; | |
2698 | unsigned long flags; | |
2699 | int ret; | |
63a0d9ab | 2700 | struct xhci_virt_ep *virt_ep; |
a1587d97 SS |
2701 | |
2702 | xhci = hcd_to_xhci(hcd); | |
2703 | udev = (struct usb_device *) ep->hcpriv; | |
2704 | /* Called with a root hub endpoint (or an endpoint that wasn't added | |
2705 | * with xhci_add_endpoint() | |
2706 | */ | |
2707 | if (!ep->hcpriv) | |
2708 | return; | |
2709 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
63a0d9ab SS |
2710 | virt_ep = &xhci->devs[udev->slot_id]->eps[ep_index]; |
2711 | if (!virt_ep->stopped_td) { | |
c92bcfa7 SS |
2712 | xhci_dbg(xhci, "Endpoint 0x%x not halted, refusing to reset.\n", |
2713 | ep->desc.bEndpointAddress); | |
2714 | return; | |
2715 | } | |
82d1009f SS |
2716 | if (usb_endpoint_xfer_control(&ep->desc)) { |
2717 | xhci_dbg(xhci, "Control endpoint stall already handled.\n"); | |
2718 | return; | |
2719 | } | |
a1587d97 SS |
2720 | |
2721 | xhci_dbg(xhci, "Queueing reset endpoint command\n"); | |
2722 | spin_lock_irqsave(&xhci->lock, flags); | |
2723 | ret = xhci_queue_reset_ep(xhci, udev->slot_id, ep_index); | |
c92bcfa7 SS |
2724 | /* |
2725 | * Can't change the ring dequeue pointer until it's transitioned to the | |
2726 | * stopped state, which is only upon a successful reset endpoint | |
2727 | * command. Better hope that last command worked! | |
2728 | */ | |
a1587d97 | 2729 | if (!ret) { |
63a0d9ab SS |
2730 | xhci_cleanup_stalled_ring(xhci, udev, ep_index); |
2731 | kfree(virt_ep->stopped_td); | |
a1587d97 SS |
2732 | xhci_ring_cmd_db(xhci); |
2733 | } | |
1624ae1c SS |
2734 | virt_ep->stopped_td = NULL; |
2735 | virt_ep->stopped_trb = NULL; | |
5e5cf6fc | 2736 | virt_ep->stopped_stream = 0; |
a1587d97 SS |
2737 | spin_unlock_irqrestore(&xhci->lock, flags); |
2738 | ||
2739 | if (ret) | |
2740 | xhci_warn(xhci, "FIXME allocate a new ring segment\n"); | |
2741 | } | |
2742 | ||
8df75f42 SS |
2743 | static int xhci_check_streams_endpoint(struct xhci_hcd *xhci, |
2744 | struct usb_device *udev, struct usb_host_endpoint *ep, | |
2745 | unsigned int slot_id) | |
2746 | { | |
2747 | int ret; | |
2748 | unsigned int ep_index; | |
2749 | unsigned int ep_state; | |
2750 | ||
2751 | if (!ep) | |
2752 | return -EINVAL; | |
64927730 | 2753 | ret = xhci_check_args(xhci_to_hcd(xhci), udev, ep, 1, true, __func__); |
8df75f42 SS |
2754 | if (ret <= 0) |
2755 | return -EINVAL; | |
842f1690 | 2756 | if (ep->ss_ep_comp.bmAttributes == 0) { |
8df75f42 SS |
2757 | xhci_warn(xhci, "WARN: SuperSpeed Endpoint Companion" |
2758 | " descriptor for ep 0x%x does not support streams\n", | |
2759 | ep->desc.bEndpointAddress); | |
2760 | return -EINVAL; | |
2761 | } | |
2762 | ||
2763 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
2764 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; | |
2765 | if (ep_state & EP_HAS_STREAMS || | |
2766 | ep_state & EP_GETTING_STREAMS) { | |
2767 | xhci_warn(xhci, "WARN: SuperSpeed bulk endpoint 0x%x " | |
2768 | "already has streams set up.\n", | |
2769 | ep->desc.bEndpointAddress); | |
2770 | xhci_warn(xhci, "Send email to xHCI maintainer and ask for " | |
2771 | "dynamic stream context array reallocation.\n"); | |
2772 | return -EINVAL; | |
2773 | } | |
2774 | if (!list_empty(&xhci->devs[slot_id]->eps[ep_index].ring->td_list)) { | |
2775 | xhci_warn(xhci, "Cannot setup streams for SuperSpeed bulk " | |
2776 | "endpoint 0x%x; URBs are pending.\n", | |
2777 | ep->desc.bEndpointAddress); | |
2778 | return -EINVAL; | |
2779 | } | |
2780 | return 0; | |
2781 | } | |
2782 | ||
2783 | static void xhci_calculate_streams_entries(struct xhci_hcd *xhci, | |
2784 | unsigned int *num_streams, unsigned int *num_stream_ctxs) | |
2785 | { | |
2786 | unsigned int max_streams; | |
2787 | ||
2788 | /* The stream context array size must be a power of two */ | |
2789 | *num_stream_ctxs = roundup_pow_of_two(*num_streams); | |
2790 | /* | |
2791 | * Find out how many primary stream array entries the host controller | |
2792 | * supports. Later we may use secondary stream arrays (similar to 2nd | |
2793 | * level page entries), but that's an optional feature for xHCI host | |
2794 | * controllers. xHCs must support at least 4 stream IDs. | |
2795 | */ | |
2796 | max_streams = HCC_MAX_PSA(xhci->hcc_params); | |
2797 | if (*num_stream_ctxs > max_streams) { | |
2798 | xhci_dbg(xhci, "xHCI HW only supports %u stream ctx entries.\n", | |
2799 | max_streams); | |
2800 | *num_stream_ctxs = max_streams; | |
2801 | *num_streams = max_streams; | |
2802 | } | |
2803 | } | |
2804 | ||
2805 | /* Returns an error code if one of the endpoint already has streams. | |
2806 | * This does not change any data structures, it only checks and gathers | |
2807 | * information. | |
2808 | */ | |
2809 | static int xhci_calculate_streams_and_bitmask(struct xhci_hcd *xhci, | |
2810 | struct usb_device *udev, | |
2811 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2812 | unsigned int *num_streams, u32 *changed_ep_bitmask) | |
2813 | { | |
8df75f42 SS |
2814 | unsigned int max_streams; |
2815 | unsigned int endpoint_flag; | |
2816 | int i; | |
2817 | int ret; | |
2818 | ||
2819 | for (i = 0; i < num_eps; i++) { | |
2820 | ret = xhci_check_streams_endpoint(xhci, udev, | |
2821 | eps[i], udev->slot_id); | |
2822 | if (ret < 0) | |
2823 | return ret; | |
2824 | ||
18b7ede5 | 2825 | max_streams = usb_ss_max_streams(&eps[i]->ss_ep_comp); |
8df75f42 SS |
2826 | if (max_streams < (*num_streams - 1)) { |
2827 | xhci_dbg(xhci, "Ep 0x%x only supports %u stream IDs.\n", | |
2828 | eps[i]->desc.bEndpointAddress, | |
2829 | max_streams); | |
2830 | *num_streams = max_streams+1; | |
2831 | } | |
2832 | ||
2833 | endpoint_flag = xhci_get_endpoint_flag(&eps[i]->desc); | |
2834 | if (*changed_ep_bitmask & endpoint_flag) | |
2835 | return -EINVAL; | |
2836 | *changed_ep_bitmask |= endpoint_flag; | |
2837 | } | |
2838 | return 0; | |
2839 | } | |
2840 | ||
2841 | static u32 xhci_calculate_no_streams_bitmask(struct xhci_hcd *xhci, | |
2842 | struct usb_device *udev, | |
2843 | struct usb_host_endpoint **eps, unsigned int num_eps) | |
2844 | { | |
2845 | u32 changed_ep_bitmask = 0; | |
2846 | unsigned int slot_id; | |
2847 | unsigned int ep_index; | |
2848 | unsigned int ep_state; | |
2849 | int i; | |
2850 | ||
2851 | slot_id = udev->slot_id; | |
2852 | if (!xhci->devs[slot_id]) | |
2853 | return 0; | |
2854 | ||
2855 | for (i = 0; i < num_eps; i++) { | |
2856 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2857 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; | |
2858 | /* Are streams already being freed for the endpoint? */ | |
2859 | if (ep_state & EP_GETTING_NO_STREAMS) { | |
2860 | xhci_warn(xhci, "WARN Can't disable streams for " | |
2861 | "endpoint 0x%x\n, " | |
2862 | "streams are being disabled already.", | |
2863 | eps[i]->desc.bEndpointAddress); | |
2864 | return 0; | |
2865 | } | |
2866 | /* Are there actually any streams to free? */ | |
2867 | if (!(ep_state & EP_HAS_STREAMS) && | |
2868 | !(ep_state & EP_GETTING_STREAMS)) { | |
2869 | xhci_warn(xhci, "WARN Can't disable streams for " | |
2870 | "endpoint 0x%x\n, " | |
2871 | "streams are already disabled!", | |
2872 | eps[i]->desc.bEndpointAddress); | |
2873 | xhci_warn(xhci, "WARN xhci_free_streams() called " | |
2874 | "with non-streams endpoint\n"); | |
2875 | return 0; | |
2876 | } | |
2877 | changed_ep_bitmask |= xhci_get_endpoint_flag(&eps[i]->desc); | |
2878 | } | |
2879 | return changed_ep_bitmask; | |
2880 | } | |
2881 | ||
2882 | /* | |
2883 | * The USB device drivers use this function (though the HCD interface in USB | |
2884 | * core) to prepare a set of bulk endpoints to use streams. Streams are used to | |
2885 | * coordinate mass storage command queueing across multiple endpoints (basically | |
2886 | * a stream ID == a task ID). | |
2887 | * | |
2888 | * Setting up streams involves allocating the same size stream context array | |
2889 | * for each endpoint and issuing a configure endpoint command for all endpoints. | |
2890 | * | |
2891 | * Don't allow the call to succeed if one endpoint only supports one stream | |
2892 | * (which means it doesn't support streams at all). | |
2893 | * | |
2894 | * Drivers may get less stream IDs than they asked for, if the host controller | |
2895 | * hardware or endpoints claim they can't support the number of requested | |
2896 | * stream IDs. | |
2897 | */ | |
2898 | int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, | |
2899 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
2900 | unsigned int num_streams, gfp_t mem_flags) | |
2901 | { | |
2902 | int i, ret; | |
2903 | struct xhci_hcd *xhci; | |
2904 | struct xhci_virt_device *vdev; | |
2905 | struct xhci_command *config_cmd; | |
2906 | unsigned int ep_index; | |
2907 | unsigned int num_stream_ctxs; | |
2908 | unsigned long flags; | |
2909 | u32 changed_ep_bitmask = 0; | |
2910 | ||
2911 | if (!eps) | |
2912 | return -EINVAL; | |
2913 | ||
2914 | /* Add one to the number of streams requested to account for | |
2915 | * stream 0 that is reserved for xHCI usage. | |
2916 | */ | |
2917 | num_streams += 1; | |
2918 | xhci = hcd_to_xhci(hcd); | |
2919 | xhci_dbg(xhci, "Driver wants %u stream IDs (including stream 0).\n", | |
2920 | num_streams); | |
2921 | ||
2922 | config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); | |
2923 | if (!config_cmd) { | |
2924 | xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); | |
2925 | return -ENOMEM; | |
2926 | } | |
2927 | ||
2928 | /* Check to make sure all endpoints are not already configured for | |
2929 | * streams. While we're at it, find the maximum number of streams that | |
2930 | * all the endpoints will support and check for duplicate endpoints. | |
2931 | */ | |
2932 | spin_lock_irqsave(&xhci->lock, flags); | |
2933 | ret = xhci_calculate_streams_and_bitmask(xhci, udev, eps, | |
2934 | num_eps, &num_streams, &changed_ep_bitmask); | |
2935 | if (ret < 0) { | |
2936 | xhci_free_command(xhci, config_cmd); | |
2937 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2938 | return ret; | |
2939 | } | |
2940 | if (num_streams <= 1) { | |
2941 | xhci_warn(xhci, "WARN: endpoints can't handle " | |
2942 | "more than one stream.\n"); | |
2943 | xhci_free_command(xhci, config_cmd); | |
2944 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2945 | return -EINVAL; | |
2946 | } | |
2947 | vdev = xhci->devs[udev->slot_id]; | |
25985edc | 2948 | /* Mark each endpoint as being in transition, so |
8df75f42 SS |
2949 | * xhci_urb_enqueue() will reject all URBs. |
2950 | */ | |
2951 | for (i = 0; i < num_eps; i++) { | |
2952 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2953 | vdev->eps[ep_index].ep_state |= EP_GETTING_STREAMS; | |
2954 | } | |
2955 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2956 | ||
2957 | /* Setup internal data structures and allocate HW data structures for | |
2958 | * streams (but don't install the HW structures in the input context | |
2959 | * until we're sure all memory allocation succeeded). | |
2960 | */ | |
2961 | xhci_calculate_streams_entries(xhci, &num_streams, &num_stream_ctxs); | |
2962 | xhci_dbg(xhci, "Need %u stream ctx entries for %u stream IDs.\n", | |
2963 | num_stream_ctxs, num_streams); | |
2964 | ||
2965 | for (i = 0; i < num_eps; i++) { | |
2966 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2967 | vdev->eps[ep_index].stream_info = xhci_alloc_stream_info(xhci, | |
2968 | num_stream_ctxs, | |
2969 | num_streams, mem_flags); | |
2970 | if (!vdev->eps[ep_index].stream_info) | |
2971 | goto cleanup; | |
2972 | /* Set maxPstreams in endpoint context and update deq ptr to | |
2973 | * point to stream context array. FIXME | |
2974 | */ | |
2975 | } | |
2976 | ||
2977 | /* Set up the input context for a configure endpoint command. */ | |
2978 | for (i = 0; i < num_eps; i++) { | |
2979 | struct xhci_ep_ctx *ep_ctx; | |
2980 | ||
2981 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
2982 | ep_ctx = xhci_get_ep_ctx(xhci, config_cmd->in_ctx, ep_index); | |
2983 | ||
2984 | xhci_endpoint_copy(xhci, config_cmd->in_ctx, | |
2985 | vdev->out_ctx, ep_index); | |
2986 | xhci_setup_streams_ep_input_ctx(xhci, ep_ctx, | |
2987 | vdev->eps[ep_index].stream_info); | |
2988 | } | |
2989 | /* Tell the HW to drop its old copy of the endpoint context info | |
2990 | * and add the updated copy from the input context. | |
2991 | */ | |
2992 | xhci_setup_input_ctx_for_config_ep(xhci, config_cmd->in_ctx, | |
2993 | vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); | |
2994 | ||
2995 | /* Issue and wait for the configure endpoint command */ | |
2996 | ret = xhci_configure_endpoint(xhci, udev, config_cmd, | |
2997 | false, false); | |
2998 | ||
2999 | /* xHC rejected the configure endpoint command for some reason, so we | |
3000 | * leave the old ring intact and free our internal streams data | |
3001 | * structure. | |
3002 | */ | |
3003 | if (ret < 0) | |
3004 | goto cleanup; | |
3005 | ||
3006 | spin_lock_irqsave(&xhci->lock, flags); | |
3007 | for (i = 0; i < num_eps; i++) { | |
3008 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3009 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; | |
3010 | xhci_dbg(xhci, "Slot %u ep ctx %u now has streams.\n", | |
3011 | udev->slot_id, ep_index); | |
3012 | vdev->eps[ep_index].ep_state |= EP_HAS_STREAMS; | |
3013 | } | |
3014 | xhci_free_command(xhci, config_cmd); | |
3015 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3016 | ||
3017 | /* Subtract 1 for stream 0, which drivers can't use */ | |
3018 | return num_streams - 1; | |
3019 | ||
3020 | cleanup: | |
3021 | /* If it didn't work, free the streams! */ | |
3022 | for (i = 0; i < num_eps; i++) { | |
3023 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3024 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); | |
8a007748 | 3025 | vdev->eps[ep_index].stream_info = NULL; |
8df75f42 SS |
3026 | /* FIXME Unset maxPstreams in endpoint context and |
3027 | * update deq ptr to point to normal string ring. | |
3028 | */ | |
3029 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; | |
3030 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; | |
3031 | xhci_endpoint_zero(xhci, vdev, eps[i]); | |
3032 | } | |
3033 | xhci_free_command(xhci, config_cmd); | |
3034 | return -ENOMEM; | |
3035 | } | |
3036 | ||
3037 | /* Transition the endpoint from using streams to being a "normal" endpoint | |
3038 | * without streams. | |
3039 | * | |
3040 | * Modify the endpoint context state, submit a configure endpoint command, | |
3041 | * and free all endpoint rings for streams if that completes successfully. | |
3042 | */ | |
3043 | int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev, | |
3044 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
3045 | gfp_t mem_flags) | |
3046 | { | |
3047 | int i, ret; | |
3048 | struct xhci_hcd *xhci; | |
3049 | struct xhci_virt_device *vdev; | |
3050 | struct xhci_command *command; | |
3051 | unsigned int ep_index; | |
3052 | unsigned long flags; | |
3053 | u32 changed_ep_bitmask; | |
3054 | ||
3055 | xhci = hcd_to_xhci(hcd); | |
3056 | vdev = xhci->devs[udev->slot_id]; | |
3057 | ||
3058 | /* Set up a configure endpoint command to remove the streams rings */ | |
3059 | spin_lock_irqsave(&xhci->lock, flags); | |
3060 | changed_ep_bitmask = xhci_calculate_no_streams_bitmask(xhci, | |
3061 | udev, eps, num_eps); | |
3062 | if (changed_ep_bitmask == 0) { | |
3063 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3064 | return -EINVAL; | |
3065 | } | |
3066 | ||
3067 | /* Use the xhci_command structure from the first endpoint. We may have | |
3068 | * allocated too many, but the driver may call xhci_free_streams() for | |
3069 | * each endpoint it grouped into one call to xhci_alloc_streams(). | |
3070 | */ | |
3071 | ep_index = xhci_get_endpoint_index(&eps[0]->desc); | |
3072 | command = vdev->eps[ep_index].stream_info->free_streams_command; | |
3073 | for (i = 0; i < num_eps; i++) { | |
3074 | struct xhci_ep_ctx *ep_ctx; | |
3075 | ||
3076 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3077 | ep_ctx = xhci_get_ep_ctx(xhci, command->in_ctx, ep_index); | |
3078 | xhci->devs[udev->slot_id]->eps[ep_index].ep_state |= | |
3079 | EP_GETTING_NO_STREAMS; | |
3080 | ||
3081 | xhci_endpoint_copy(xhci, command->in_ctx, | |
3082 | vdev->out_ctx, ep_index); | |
3083 | xhci_setup_no_streams_ep_input_ctx(xhci, ep_ctx, | |
3084 | &vdev->eps[ep_index]); | |
3085 | } | |
3086 | xhci_setup_input_ctx_for_config_ep(xhci, command->in_ctx, | |
3087 | vdev->out_ctx, changed_ep_bitmask, changed_ep_bitmask); | |
3088 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3089 | ||
3090 | /* Issue and wait for the configure endpoint command, | |
3091 | * which must succeed. | |
3092 | */ | |
3093 | ret = xhci_configure_endpoint(xhci, udev, command, | |
3094 | false, true); | |
3095 | ||
3096 | /* xHC rejected the configure endpoint command for some reason, so we | |
3097 | * leave the streams rings intact. | |
3098 | */ | |
3099 | if (ret < 0) | |
3100 | return ret; | |
3101 | ||
3102 | spin_lock_irqsave(&xhci->lock, flags); | |
3103 | for (i = 0; i < num_eps; i++) { | |
3104 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3105 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); | |
8a007748 | 3106 | vdev->eps[ep_index].stream_info = NULL; |
8df75f42 SS |
3107 | /* FIXME Unset maxPstreams in endpoint context and |
3108 | * update deq ptr to point to normal string ring. | |
3109 | */ | |
3110 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_NO_STREAMS; | |
3111 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; | |
3112 | } | |
3113 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3114 | ||
3115 | return 0; | |
3116 | } | |
3117 | ||
2cf95c18 SS |
3118 | /* |
3119 | * Deletes endpoint resources for endpoints that were active before a Reset | |
3120 | * Device command, or a Disable Slot command. The Reset Device command leaves | |
3121 | * the control endpoint intact, whereas the Disable Slot command deletes it. | |
3122 | * | |
3123 | * Must be called with xhci->lock held. | |
3124 | */ | |
3125 | void xhci_free_device_endpoint_resources(struct xhci_hcd *xhci, | |
3126 | struct xhci_virt_device *virt_dev, bool drop_control_ep) | |
3127 | { | |
3128 | int i; | |
3129 | unsigned int num_dropped_eps = 0; | |
3130 | unsigned int drop_flags = 0; | |
3131 | ||
3132 | for (i = (drop_control_ep ? 0 : 1); i < 31; i++) { | |
3133 | if (virt_dev->eps[i].ring) { | |
3134 | drop_flags |= 1 << i; | |
3135 | num_dropped_eps++; | |
3136 | } | |
3137 | } | |
3138 | xhci->num_active_eps -= num_dropped_eps; | |
3139 | if (num_dropped_eps) | |
3140 | xhci_dbg(xhci, "Dropped %u ep ctxs, flags = 0x%x, " | |
3141 | "%u now active.\n", | |
3142 | num_dropped_eps, drop_flags, | |
3143 | xhci->num_active_eps); | |
3144 | } | |
3145 | ||
2a8f82c4 SS |
3146 | /* |
3147 | * This submits a Reset Device Command, which will set the device state to 0, | |
3148 | * set the device address to 0, and disable all the endpoints except the default | |
3149 | * control endpoint. The USB core should come back and call | |
3150 | * xhci_address_device(), and then re-set up the configuration. If this is | |
3151 | * called because of a usb_reset_and_verify_device(), then the old alternate | |
3152 | * settings will be re-installed through the normal bandwidth allocation | |
3153 | * functions. | |
3154 | * | |
3155 | * Wait for the Reset Device command to finish. Remove all structures | |
3156 | * associated with the endpoints that were disabled. Clear the input device | |
3157 | * structure? Cache the rings? Reset the control endpoint 0 max packet size? | |
f0615c45 AX |
3158 | * |
3159 | * If the virt_dev to be reset does not exist or does not match the udev, | |
3160 | * it means the device is lost, possibly due to the xHC restore error and | |
3161 | * re-initialization during S3/S4. In this case, call xhci_alloc_dev() to | |
3162 | * re-allocate the device. | |
2a8f82c4 | 3163 | */ |
f0615c45 | 3164 | int xhci_discover_or_reset_device(struct usb_hcd *hcd, struct usb_device *udev) |
2a8f82c4 SS |
3165 | { |
3166 | int ret, i; | |
3167 | unsigned long flags; | |
3168 | struct xhci_hcd *xhci; | |
3169 | unsigned int slot_id; | |
3170 | struct xhci_virt_device *virt_dev; | |
3171 | struct xhci_command *reset_device_cmd; | |
3172 | int timeleft; | |
3173 | int last_freed_endpoint; | |
001fd382 | 3174 | struct xhci_slot_ctx *slot_ctx; |
2e27980e | 3175 | int old_active_eps = 0; |
2a8f82c4 | 3176 | |
f0615c45 | 3177 | ret = xhci_check_args(hcd, udev, NULL, 0, false, __func__); |
2a8f82c4 SS |
3178 | if (ret <= 0) |
3179 | return ret; | |
3180 | xhci = hcd_to_xhci(hcd); | |
3181 | slot_id = udev->slot_id; | |
3182 | virt_dev = xhci->devs[slot_id]; | |
f0615c45 AX |
3183 | if (!virt_dev) { |
3184 | xhci_dbg(xhci, "The device to be reset with slot ID %u does " | |
3185 | "not exist. Re-allocate the device\n", slot_id); | |
3186 | ret = xhci_alloc_dev(hcd, udev); | |
3187 | if (ret == 1) | |
3188 | return 0; | |
3189 | else | |
3190 | return -EINVAL; | |
3191 | } | |
3192 | ||
3193 | if (virt_dev->udev != udev) { | |
3194 | /* If the virt_dev and the udev does not match, this virt_dev | |
3195 | * may belong to another udev. | |
3196 | * Re-allocate the device. | |
3197 | */ | |
3198 | xhci_dbg(xhci, "The device to be reset with slot ID %u does " | |
3199 | "not match the udev. Re-allocate the device\n", | |
3200 | slot_id); | |
3201 | ret = xhci_alloc_dev(hcd, udev); | |
3202 | if (ret == 1) | |
3203 | return 0; | |
3204 | else | |
3205 | return -EINVAL; | |
3206 | } | |
2a8f82c4 | 3207 | |
001fd382 ML |
3208 | /* If device is not setup, there is no point in resetting it */ |
3209 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); | |
3210 | if (GET_SLOT_STATE(le32_to_cpu(slot_ctx->dev_state)) == | |
3211 | SLOT_STATE_DISABLED) | |
3212 | return 0; | |
3213 | ||
2a8f82c4 SS |
3214 | xhci_dbg(xhci, "Resetting device with slot ID %u\n", slot_id); |
3215 | /* Allocate the command structure that holds the struct completion. | |
3216 | * Assume we're in process context, since the normal device reset | |
3217 | * process has to wait for the device anyway. Storage devices are | |
3218 | * reset as part of error handling, so use GFP_NOIO instead of | |
3219 | * GFP_KERNEL. | |
3220 | */ | |
3221 | reset_device_cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO); | |
3222 | if (!reset_device_cmd) { | |
3223 | xhci_dbg(xhci, "Couldn't allocate command structure.\n"); | |
3224 | return -ENOMEM; | |
3225 | } | |
3226 | ||
3227 | /* Attempt to submit the Reset Device command to the command ring */ | |
3228 | spin_lock_irqsave(&xhci->lock, flags); | |
3229 | reset_device_cmd->command_trb = xhci->cmd_ring->enqueue; | |
7a3783ef PZ |
3230 | |
3231 | /* Enqueue pointer can be left pointing to the link TRB, | |
3232 | * we must handle that | |
3233 | */ | |
f5960b69 | 3234 | if (TRB_TYPE_LINK_LE32(reset_device_cmd->command_trb->link.control)) |
7a3783ef PZ |
3235 | reset_device_cmd->command_trb = |
3236 | xhci->cmd_ring->enq_seg->next->trbs; | |
3237 | ||
2a8f82c4 SS |
3238 | list_add_tail(&reset_device_cmd->cmd_list, &virt_dev->cmd_list); |
3239 | ret = xhci_queue_reset_device(xhci, slot_id); | |
3240 | if (ret) { | |
3241 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
3242 | list_del(&reset_device_cmd->cmd_list); | |
3243 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3244 | goto command_cleanup; | |
3245 | } | |
3246 | xhci_ring_cmd_db(xhci); | |
3247 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3248 | ||
3249 | /* Wait for the Reset Device command to finish */ | |
3250 | timeleft = wait_for_completion_interruptible_timeout( | |
3251 | reset_device_cmd->completion, | |
3252 | USB_CTRL_SET_TIMEOUT); | |
3253 | if (timeleft <= 0) { | |
3254 | xhci_warn(xhci, "%s while waiting for reset device command\n", | |
3255 | timeleft == 0 ? "Timeout" : "Signal"); | |
3256 | spin_lock_irqsave(&xhci->lock, flags); | |
3257 | /* The timeout might have raced with the event ring handler, so | |
3258 | * only delete from the list if the item isn't poisoned. | |
3259 | */ | |
3260 | if (reset_device_cmd->cmd_list.next != LIST_POISON1) | |
3261 | list_del(&reset_device_cmd->cmd_list); | |
3262 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3263 | ret = -ETIME; | |
3264 | goto command_cleanup; | |
3265 | } | |
3266 | ||
3267 | /* The Reset Device command can't fail, according to the 0.95/0.96 spec, | |
3268 | * unless we tried to reset a slot ID that wasn't enabled, | |
3269 | * or the device wasn't in the addressed or configured state. | |
3270 | */ | |
3271 | ret = reset_device_cmd->status; | |
3272 | switch (ret) { | |
3273 | case COMP_EBADSLT: /* 0.95 completion code for bad slot ID */ | |
3274 | case COMP_CTX_STATE: /* 0.96 completion code for same thing */ | |
3275 | xhci_info(xhci, "Can't reset device (slot ID %u) in %s state\n", | |
3276 | slot_id, | |
3277 | xhci_get_slot_state(xhci, virt_dev->out_ctx)); | |
3278 | xhci_info(xhci, "Not freeing device rings.\n"); | |
3279 | /* Don't treat this as an error. May change my mind later. */ | |
3280 | ret = 0; | |
3281 | goto command_cleanup; | |
3282 | case COMP_SUCCESS: | |
3283 | xhci_dbg(xhci, "Successful reset device command.\n"); | |
3284 | break; | |
3285 | default: | |
3286 | if (xhci_is_vendor_info_code(xhci, ret)) | |
3287 | break; | |
3288 | xhci_warn(xhci, "Unknown completion code %u for " | |
3289 | "reset device command.\n", ret); | |
3290 | ret = -EINVAL; | |
3291 | goto command_cleanup; | |
3292 | } | |
3293 | ||
2cf95c18 SS |
3294 | /* Free up host controller endpoint resources */ |
3295 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { | |
3296 | spin_lock_irqsave(&xhci->lock, flags); | |
3297 | /* Don't delete the default control endpoint resources */ | |
3298 | xhci_free_device_endpoint_resources(xhci, virt_dev, false); | |
3299 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3300 | } | |
3301 | ||
2a8f82c4 SS |
3302 | /* Everything but endpoint 0 is disabled, so free or cache the rings. */ |
3303 | last_freed_endpoint = 1; | |
3304 | for (i = 1; i < 31; ++i) { | |
2dea75d9 DT |
3305 | struct xhci_virt_ep *ep = &virt_dev->eps[i]; |
3306 | ||
3307 | if (ep->ep_state & EP_HAS_STREAMS) { | |
3308 | xhci_free_stream_info(xhci, ep->stream_info); | |
3309 | ep->stream_info = NULL; | |
3310 | ep->ep_state &= ~EP_HAS_STREAMS; | |
3311 | } | |
3312 | ||
3313 | if (ep->ring) { | |
3314 | xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); | |
3315 | last_freed_endpoint = i; | |
3316 | } | |
2e27980e SS |
3317 | if (!list_empty(&virt_dev->eps[i].bw_endpoint_list)) |
3318 | xhci_drop_ep_from_interval_table(xhci, | |
3319 | &virt_dev->eps[i].bw_info, | |
3320 | virt_dev->bw_table, | |
3321 | udev, | |
3322 | &virt_dev->eps[i], | |
3323 | virt_dev->tt_info); | |
9af5d71d | 3324 | xhci_clear_endpoint_bw_info(&virt_dev->eps[i].bw_info); |
2a8f82c4 | 3325 | } |
2e27980e SS |
3326 | /* If necessary, update the number of active TTs on this root port */ |
3327 | xhci_update_tt_active_eps(xhci, virt_dev, old_active_eps); | |
3328 | ||
2a8f82c4 SS |
3329 | xhci_dbg(xhci, "Output context after successful reset device cmd:\n"); |
3330 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, last_freed_endpoint); | |
3331 | ret = 0; | |
3332 | ||
3333 | command_cleanup: | |
3334 | xhci_free_command(xhci, reset_device_cmd); | |
3335 | return ret; | |
3336 | } | |
3337 | ||
3ffbba95 SS |
3338 | /* |
3339 | * At this point, the struct usb_device is about to go away, the device has | |
3340 | * disconnected, and all traffic has been stopped and the endpoints have been | |
3341 | * disabled. Free any HC data structures associated with that device. | |
3342 | */ | |
3343 | void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev) | |
3344 | { | |
3345 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
6f5165cf | 3346 | struct xhci_virt_device *virt_dev; |
3ffbba95 | 3347 | unsigned long flags; |
c526d0d4 | 3348 | u32 state; |
64927730 | 3349 | int i, ret; |
3ffbba95 | 3350 | |
64927730 | 3351 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
7bd89b40 SS |
3352 | /* If the host is halted due to driver unload, we still need to free the |
3353 | * device. | |
3354 | */ | |
3355 | if (ret <= 0 && ret != -ENODEV) | |
3ffbba95 | 3356 | return; |
64927730 | 3357 | |
6f5165cf | 3358 | virt_dev = xhci->devs[udev->slot_id]; |
6f5165cf SS |
3359 | |
3360 | /* Stop any wayward timer functions (which may grab the lock) */ | |
3361 | for (i = 0; i < 31; ++i) { | |
3362 | virt_dev->eps[i].ep_state &= ~EP_HALT_PENDING; | |
3363 | del_timer_sync(&virt_dev->eps[i].stop_cmd_timer); | |
3364 | } | |
3ffbba95 | 3365 | |
65580b43 AX |
3366 | if (udev->usb2_hw_lpm_enabled) { |
3367 | xhci_set_usb2_hardware_lpm(hcd, udev, 0); | |
3368 | udev->usb2_hw_lpm_enabled = 0; | |
3369 | } | |
3370 | ||
3ffbba95 | 3371 | spin_lock_irqsave(&xhci->lock, flags); |
c526d0d4 SS |
3372 | /* Don't disable the slot if the host controller is dead. */ |
3373 | state = xhci_readl(xhci, &xhci->op_regs->status); | |
7bd89b40 SS |
3374 | if (state == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING) || |
3375 | (xhci->xhc_state & XHCI_STATE_HALTED)) { | |
c526d0d4 SS |
3376 | xhci_free_virt_device(xhci, udev->slot_id); |
3377 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3378 | return; | |
3379 | } | |
3380 | ||
23e3be11 | 3381 | if (xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) { |
3ffbba95 SS |
3382 | spin_unlock_irqrestore(&xhci->lock, flags); |
3383 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
3384 | return; | |
3385 | } | |
23e3be11 | 3386 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
3387 | spin_unlock_irqrestore(&xhci->lock, flags); |
3388 | /* | |
3389 | * Event command completion handler will free any data structures | |
f88ba78d | 3390 | * associated with the slot. XXX Can free sleep? |
3ffbba95 SS |
3391 | */ |
3392 | } | |
3393 | ||
2cf95c18 SS |
3394 | /* |
3395 | * Checks if we have enough host controller resources for the default control | |
3396 | * endpoint. | |
3397 | * | |
3398 | * Must be called with xhci->lock held. | |
3399 | */ | |
3400 | static int xhci_reserve_host_control_ep_resources(struct xhci_hcd *xhci) | |
3401 | { | |
3402 | if (xhci->num_active_eps + 1 > xhci->limit_active_eps) { | |
3403 | xhci_dbg(xhci, "Not enough ep ctxs: " | |
3404 | "%u active, need to add 1, limit is %u.\n", | |
3405 | xhci->num_active_eps, xhci->limit_active_eps); | |
3406 | return -ENOMEM; | |
3407 | } | |
3408 | xhci->num_active_eps += 1; | |
3409 | xhci_dbg(xhci, "Adding 1 ep ctx, %u now active.\n", | |
3410 | xhci->num_active_eps); | |
3411 | return 0; | |
3412 | } | |
3413 | ||
3414 | ||
3ffbba95 SS |
3415 | /* |
3416 | * Returns 0 if the xHC ran out of device slots, the Enable Slot command | |
3417 | * timed out, or allocating memory failed. Returns 1 on success. | |
3418 | */ | |
3419 | int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev) | |
3420 | { | |
3421 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
3422 | unsigned long flags; | |
3423 | int timeleft; | |
3424 | int ret; | |
3425 | ||
3426 | spin_lock_irqsave(&xhci->lock, flags); | |
23e3be11 | 3427 | ret = xhci_queue_slot_control(xhci, TRB_ENABLE_SLOT, 0); |
3ffbba95 SS |
3428 | if (ret) { |
3429 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3430 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
3431 | return 0; | |
3432 | } | |
23e3be11 | 3433 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
3434 | spin_unlock_irqrestore(&xhci->lock, flags); |
3435 | ||
3436 | /* XXX: how much time for xHC slot assignment? */ | |
3437 | timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, | |
3438 | USB_CTRL_SET_TIMEOUT); | |
3439 | if (timeleft <= 0) { | |
3440 | xhci_warn(xhci, "%s while waiting for a slot\n", | |
3441 | timeleft == 0 ? "Timeout" : "Signal"); | |
3442 | /* FIXME cancel the enable slot request */ | |
3443 | return 0; | |
3444 | } | |
3445 | ||
3ffbba95 SS |
3446 | if (!xhci->slot_id) { |
3447 | xhci_err(xhci, "Error while assigning device slot ID\n"); | |
3ffbba95 SS |
3448 | return 0; |
3449 | } | |
2cf95c18 SS |
3450 | |
3451 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { | |
3452 | spin_lock_irqsave(&xhci->lock, flags); | |
3453 | ret = xhci_reserve_host_control_ep_resources(xhci); | |
3454 | if (ret) { | |
3455 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3456 | xhci_warn(xhci, "Not enough host resources, " | |
3457 | "active endpoint contexts = %u\n", | |
3458 | xhci->num_active_eps); | |
3459 | goto disable_slot; | |
3460 | } | |
3461 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3462 | } | |
3463 | /* Use GFP_NOIO, since this function can be called from | |
a6d940dd SS |
3464 | * xhci_discover_or_reset_device(), which may be called as part of |
3465 | * mass storage driver error handling. | |
3466 | */ | |
3467 | if (!xhci_alloc_virt_device(xhci, xhci->slot_id, udev, GFP_NOIO)) { | |
3ffbba95 | 3468 | xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n"); |
2cf95c18 | 3469 | goto disable_slot; |
3ffbba95 SS |
3470 | } |
3471 | udev->slot_id = xhci->slot_id; | |
3472 | /* Is this a LS or FS device under a HS hub? */ | |
3473 | /* Hub or peripherial? */ | |
3ffbba95 | 3474 | return 1; |
2cf95c18 SS |
3475 | |
3476 | disable_slot: | |
3477 | /* Disable slot, if we can do it without mem alloc */ | |
3478 | spin_lock_irqsave(&xhci->lock, flags); | |
3479 | if (!xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) | |
3480 | xhci_ring_cmd_db(xhci); | |
3481 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3482 | return 0; | |
3ffbba95 SS |
3483 | } |
3484 | ||
3485 | /* | |
3486 | * Issue an Address Device command (which will issue a SetAddress request to | |
3487 | * the device). | |
3488 | * We should be protected by the usb_address0_mutex in khubd's hub_port_init, so | |
3489 | * we should only issue and wait on one address command at the same time. | |
3490 | * | |
3491 | * We add one to the device address issued by the hardware because the USB core | |
3492 | * uses address 1 for the root hubs (even though they're not really devices). | |
3493 | */ | |
3494 | int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) | |
3495 | { | |
3496 | unsigned long flags; | |
3497 | int timeleft; | |
3498 | struct xhci_virt_device *virt_dev; | |
3499 | int ret = 0; | |
3500 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
d115b048 JY |
3501 | struct xhci_slot_ctx *slot_ctx; |
3502 | struct xhci_input_control_ctx *ctrl_ctx; | |
8e595a5d | 3503 | u64 temp_64; |
3ffbba95 SS |
3504 | |
3505 | if (!udev->slot_id) { | |
3506 | xhci_dbg(xhci, "Bad Slot ID %d\n", udev->slot_id); | |
3507 | return -EINVAL; | |
3508 | } | |
3509 | ||
3ffbba95 SS |
3510 | virt_dev = xhci->devs[udev->slot_id]; |
3511 | ||
7ed603ec ME |
3512 | if (WARN_ON(!virt_dev)) { |
3513 | /* | |
3514 | * In plug/unplug torture test with an NEC controller, | |
3515 | * a zero-dereference was observed once due to virt_dev = 0. | |
3516 | * Print useful debug rather than crash if it is observed again! | |
3517 | */ | |
3518 | xhci_warn(xhci, "Virt dev invalid for slot_id 0x%x!\n", | |
3519 | udev->slot_id); | |
3520 | return -EINVAL; | |
3521 | } | |
3522 | ||
f0615c45 AX |
3523 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
3524 | /* | |
3525 | * If this is the first Set Address since device plug-in or | |
3526 | * virt_device realloaction after a resume with an xHCI power loss, | |
3527 | * then set up the slot context. | |
3528 | */ | |
3529 | if (!slot_ctx->dev_info) | |
3ffbba95 | 3530 | xhci_setup_addressable_virt_dev(xhci, udev); |
f0615c45 | 3531 | /* Otherwise, update the control endpoint ring enqueue pointer. */ |
2d1ee590 SS |
3532 | else |
3533 | xhci_copy_ep0_dequeue_into_input_ctx(xhci, udev); | |
d31c285b SS |
3534 | ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx); |
3535 | ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG | EP0_FLAG); | |
3536 | ctrl_ctx->drop_flags = 0; | |
3537 | ||
66e49d87 | 3538 | xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); |
d115b048 | 3539 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); |
3ffbba95 | 3540 | |
f88ba78d | 3541 | spin_lock_irqsave(&xhci->lock, flags); |
d115b048 JY |
3542 | ret = xhci_queue_address_device(xhci, virt_dev->in_ctx->dma, |
3543 | udev->slot_id); | |
3ffbba95 SS |
3544 | if (ret) { |
3545 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3546 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
3547 | return ret; | |
3548 | } | |
23e3be11 | 3549 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
3550 | spin_unlock_irqrestore(&xhci->lock, flags); |
3551 | ||
3552 | /* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */ | |
3553 | timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev, | |
3554 | USB_CTRL_SET_TIMEOUT); | |
3555 | /* FIXME: From section 4.3.4: "Software shall be responsible for timing | |
3556 | * the SetAddress() "recovery interval" required by USB and aborting the | |
3557 | * command on a timeout. | |
3558 | */ | |
3559 | if (timeleft <= 0) { | |
cd68176a | 3560 | xhci_warn(xhci, "%s while waiting for address device command\n", |
3ffbba95 SS |
3561 | timeleft == 0 ? "Timeout" : "Signal"); |
3562 | /* FIXME cancel the address device command */ | |
3563 | return -ETIME; | |
3564 | } | |
3565 | ||
3ffbba95 SS |
3566 | switch (virt_dev->cmd_status) { |
3567 | case COMP_CTX_STATE: | |
3568 | case COMP_EBADSLT: | |
3569 | xhci_err(xhci, "Setup ERROR: address device command for slot %d.\n", | |
3570 | udev->slot_id); | |
3571 | ret = -EINVAL; | |
3572 | break; | |
3573 | case COMP_TX_ERR: | |
3574 | dev_warn(&udev->dev, "Device not responding to set address.\n"); | |
3575 | ret = -EPROTO; | |
3576 | break; | |
f6ba6fe2 AH |
3577 | case COMP_DEV_ERR: |
3578 | dev_warn(&udev->dev, "ERROR: Incompatible device for address " | |
3579 | "device command.\n"); | |
3580 | ret = -ENODEV; | |
3581 | break; | |
3ffbba95 SS |
3582 | case COMP_SUCCESS: |
3583 | xhci_dbg(xhci, "Successful Address Device command\n"); | |
3584 | break; | |
3585 | default: | |
3586 | xhci_err(xhci, "ERROR: unexpected command completion " | |
3587 | "code 0x%x.\n", virt_dev->cmd_status); | |
66e49d87 | 3588 | xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); |
d115b048 | 3589 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); |
3ffbba95 SS |
3590 | ret = -EINVAL; |
3591 | break; | |
3592 | } | |
3593 | if (ret) { | |
3ffbba95 SS |
3594 | return ret; |
3595 | } | |
8e595a5d SS |
3596 | temp_64 = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); |
3597 | xhci_dbg(xhci, "Op regs DCBAA ptr = %#016llx\n", temp_64); | |
3598 | xhci_dbg(xhci, "Slot ID %d dcbaa entry @%p = %#016llx\n", | |
28ccd296 ME |
3599 | udev->slot_id, |
3600 | &xhci->dcbaa->dev_context_ptrs[udev->slot_id], | |
3601 | (unsigned long long) | |
3602 | le64_to_cpu(xhci->dcbaa->dev_context_ptrs[udev->slot_id])); | |
700e2052 | 3603 | xhci_dbg(xhci, "Output Context DMA address = %#08llx\n", |
d115b048 | 3604 | (unsigned long long)virt_dev->out_ctx->dma); |
3ffbba95 | 3605 | xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id); |
d115b048 | 3606 | xhci_dbg_ctx(xhci, virt_dev->in_ctx, 2); |
3ffbba95 | 3607 | xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id); |
d115b048 | 3608 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 2); |
3ffbba95 SS |
3609 | /* |
3610 | * USB core uses address 1 for the roothubs, so we add one to the | |
3611 | * address given back to us by the HC. | |
3612 | */ | |
d115b048 | 3613 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); |
c8d4af8e AX |
3614 | /* Use kernel assigned address for devices; store xHC assigned |
3615 | * address locally. */ | |
28ccd296 ME |
3616 | virt_dev->address = (le32_to_cpu(slot_ctx->dev_state) & DEV_ADDR_MASK) |
3617 | + 1; | |
f94e0186 | 3618 | /* Zero the input context control for later use */ |
d115b048 JY |
3619 | ctrl_ctx->add_flags = 0; |
3620 | ctrl_ctx->drop_flags = 0; | |
3ffbba95 | 3621 | |
c8d4af8e | 3622 | xhci_dbg(xhci, "Internal device address = %d\n", virt_dev->address); |
3ffbba95 SS |
3623 | |
3624 | return 0; | |
3625 | } | |
3626 | ||
9574323c AX |
3627 | #ifdef CONFIG_USB_SUSPEND |
3628 | ||
3629 | /* BESL to HIRD Encoding array for USB2 LPM */ | |
3630 | static int xhci_besl_encoding[16] = {125, 150, 200, 300, 400, 500, 1000, 2000, | |
3631 | 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000}; | |
3632 | ||
3633 | /* Calculate HIRD/BESL for USB2 PORTPMSC*/ | |
f99298bf AX |
3634 | static int xhci_calculate_hird_besl(struct xhci_hcd *xhci, |
3635 | struct usb_device *udev) | |
9574323c | 3636 | { |
f99298bf AX |
3637 | int u2del, besl, besl_host; |
3638 | int besl_device = 0; | |
3639 | u32 field; | |
3640 | ||
3641 | u2del = HCS_U2_LATENCY(xhci->hcs_params3); | |
3642 | field = le32_to_cpu(udev->bos->ext_cap->bmAttributes); | |
9574323c | 3643 | |
f99298bf AX |
3644 | if (field & USB_BESL_SUPPORT) { |
3645 | for (besl_host = 0; besl_host < 16; besl_host++) { | |
3646 | if (xhci_besl_encoding[besl_host] >= u2del) | |
9574323c AX |
3647 | break; |
3648 | } | |
f99298bf AX |
3649 | /* Use baseline BESL value as default */ |
3650 | if (field & USB_BESL_BASELINE_VALID) | |
3651 | besl_device = USB_GET_BESL_BASELINE(field); | |
3652 | else if (field & USB_BESL_DEEP_VALID) | |
3653 | besl_device = USB_GET_BESL_DEEP(field); | |
9574323c AX |
3654 | } else { |
3655 | if (u2del <= 50) | |
f99298bf | 3656 | besl_host = 0; |
9574323c | 3657 | else |
f99298bf | 3658 | besl_host = (u2del - 51) / 75 + 1; |
9574323c AX |
3659 | } |
3660 | ||
f99298bf AX |
3661 | besl = besl_host + besl_device; |
3662 | if (besl > 15) | |
3663 | besl = 15; | |
3664 | ||
3665 | return besl; | |
9574323c AX |
3666 | } |
3667 | ||
3668 | static int xhci_usb2_software_lpm_test(struct usb_hcd *hcd, | |
3669 | struct usb_device *udev) | |
3670 | { | |
3671 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
3672 | struct dev_info *dev_info; | |
3673 | __le32 __iomem **port_array; | |
3674 | __le32 __iomem *addr, *pm_addr; | |
3675 | u32 temp, dev_id; | |
3676 | unsigned int port_num; | |
3677 | unsigned long flags; | |
f99298bf | 3678 | int hird; |
9574323c AX |
3679 | int ret; |
3680 | ||
3681 | if (hcd->speed == HCD_USB3 || !xhci->sw_lpm_support || | |
3682 | !udev->lpm_capable) | |
3683 | return -EINVAL; | |
3684 | ||
3685 | /* we only support lpm for non-hub device connected to root hub yet */ | |
3686 | if (!udev->parent || udev->parent->parent || | |
3687 | udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
3688 | return -EINVAL; | |
3689 | ||
3690 | spin_lock_irqsave(&xhci->lock, flags); | |
3691 | ||
3692 | /* Look for devices in lpm_failed_devs list */ | |
3693 | dev_id = le16_to_cpu(udev->descriptor.idVendor) << 16 | | |
3694 | le16_to_cpu(udev->descriptor.idProduct); | |
3695 | list_for_each_entry(dev_info, &xhci->lpm_failed_devs, list) { | |
3696 | if (dev_info->dev_id == dev_id) { | |
3697 | ret = -EINVAL; | |
3698 | goto finish; | |
3699 | } | |
3700 | } | |
3701 | ||
3702 | port_array = xhci->usb2_ports; | |
3703 | port_num = udev->portnum - 1; | |
3704 | ||
3705 | if (port_num > HCS_MAX_PORTS(xhci->hcs_params1)) { | |
3706 | xhci_dbg(xhci, "invalid port number %d\n", udev->portnum); | |
3707 | ret = -EINVAL; | |
3708 | goto finish; | |
3709 | } | |
3710 | ||
3711 | /* | |
3712 | * Test USB 2.0 software LPM. | |
3713 | * FIXME: some xHCI 1.0 hosts may implement a new register to set up | |
3714 | * hardware-controlled USB 2.0 LPM. See section 5.4.11 and 4.23.5.1.1.1 | |
3715 | * in the June 2011 errata release. | |
3716 | */ | |
3717 | xhci_dbg(xhci, "test port %d software LPM\n", port_num); | |
3718 | /* | |
3719 | * Set L1 Device Slot and HIRD/BESL. | |
3720 | * Check device's USB 2.0 extension descriptor to determine whether | |
3721 | * HIRD or BESL shoule be used. See USB2.0 LPM errata. | |
3722 | */ | |
3723 | pm_addr = port_array[port_num] + 1; | |
f99298bf | 3724 | hird = xhci_calculate_hird_besl(xhci, udev); |
9574323c AX |
3725 | temp = PORT_L1DS(udev->slot_id) | PORT_HIRD(hird); |
3726 | xhci_writel(xhci, temp, pm_addr); | |
3727 | ||
3728 | /* Set port link state to U2(L1) */ | |
3729 | addr = port_array[port_num]; | |
3730 | xhci_set_link_state(xhci, port_array, port_num, XDEV_U2); | |
3731 | ||
3732 | /* wait for ACK */ | |
3733 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3734 | msleep(10); | |
3735 | spin_lock_irqsave(&xhci->lock, flags); | |
3736 | ||
3737 | /* Check L1 Status */ | |
3738 | ret = handshake(xhci, pm_addr, PORT_L1S_MASK, PORT_L1S_SUCCESS, 125); | |
3739 | if (ret != -ETIMEDOUT) { | |
3740 | /* enter L1 successfully */ | |
3741 | temp = xhci_readl(xhci, addr); | |
3742 | xhci_dbg(xhci, "port %d entered L1 state, port status 0x%x\n", | |
3743 | port_num, temp); | |
3744 | ret = 0; | |
3745 | } else { | |
3746 | temp = xhci_readl(xhci, pm_addr); | |
3747 | xhci_dbg(xhci, "port %d software lpm failed, L1 status %d\n", | |
3748 | port_num, temp & PORT_L1S_MASK); | |
3749 | ret = -EINVAL; | |
3750 | } | |
3751 | ||
3752 | /* Resume the port */ | |
3753 | xhci_set_link_state(xhci, port_array, port_num, XDEV_U0); | |
3754 | ||
3755 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3756 | msleep(10); | |
3757 | spin_lock_irqsave(&xhci->lock, flags); | |
3758 | ||
3759 | /* Clear PLC */ | |
3760 | xhci_test_and_clear_bit(xhci, port_array, port_num, PORT_PLC); | |
3761 | ||
3762 | /* Check PORTSC to make sure the device is in the right state */ | |
3763 | if (!ret) { | |
3764 | temp = xhci_readl(xhci, addr); | |
3765 | xhci_dbg(xhci, "resumed port %d status 0x%x\n", port_num, temp); | |
3766 | if (!(temp & PORT_CONNECT) || !(temp & PORT_PE) || | |
3767 | (temp & PORT_PLS_MASK) != XDEV_U0) { | |
3768 | xhci_dbg(xhci, "port L1 resume fail\n"); | |
3769 | ret = -EINVAL; | |
3770 | } | |
3771 | } | |
3772 | ||
3773 | if (ret) { | |
3774 | /* Insert dev to lpm_failed_devs list */ | |
3775 | xhci_warn(xhci, "device LPM test failed, may disconnect and " | |
3776 | "re-enumerate\n"); | |
3777 | dev_info = kzalloc(sizeof(struct dev_info), GFP_ATOMIC); | |
3778 | if (!dev_info) { | |
3779 | ret = -ENOMEM; | |
3780 | goto finish; | |
3781 | } | |
3782 | dev_info->dev_id = dev_id; | |
3783 | INIT_LIST_HEAD(&dev_info->list); | |
3784 | list_add(&dev_info->list, &xhci->lpm_failed_devs); | |
3785 | } else { | |
3786 | xhci_ring_device(xhci, udev->slot_id); | |
3787 | } | |
3788 | ||
3789 | finish: | |
3790 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3791 | return ret; | |
3792 | } | |
3793 | ||
65580b43 AX |
3794 | int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd, |
3795 | struct usb_device *udev, int enable) | |
3796 | { | |
3797 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
3798 | __le32 __iomem **port_array; | |
3799 | __le32 __iomem *pm_addr; | |
3800 | u32 temp; | |
3801 | unsigned int port_num; | |
3802 | unsigned long flags; | |
f99298bf | 3803 | int hird; |
65580b43 AX |
3804 | |
3805 | if (hcd->speed == HCD_USB3 || !xhci->hw_lpm_support || | |
3806 | !udev->lpm_capable) | |
3807 | return -EPERM; | |
3808 | ||
3809 | if (!udev->parent || udev->parent->parent || | |
3810 | udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
3811 | return -EPERM; | |
3812 | ||
3813 | if (udev->usb2_hw_lpm_capable != 1) | |
3814 | return -EPERM; | |
3815 | ||
3816 | spin_lock_irqsave(&xhci->lock, flags); | |
3817 | ||
3818 | port_array = xhci->usb2_ports; | |
3819 | port_num = udev->portnum - 1; | |
3820 | pm_addr = port_array[port_num] + 1; | |
3821 | temp = xhci_readl(xhci, pm_addr); | |
3822 | ||
3823 | xhci_dbg(xhci, "%s port %d USB2 hardware LPM\n", | |
3824 | enable ? "enable" : "disable", port_num); | |
3825 | ||
f99298bf | 3826 | hird = xhci_calculate_hird_besl(xhci, udev); |
65580b43 AX |
3827 | |
3828 | if (enable) { | |
3829 | temp &= ~PORT_HIRD_MASK; | |
3830 | temp |= PORT_HIRD(hird) | PORT_RWE; | |
3831 | xhci_writel(xhci, temp, pm_addr); | |
3832 | temp = xhci_readl(xhci, pm_addr); | |
3833 | temp |= PORT_HLE; | |
3834 | xhci_writel(xhci, temp, pm_addr); | |
3835 | } else { | |
3836 | temp &= ~(PORT_HLE | PORT_RWE | PORT_HIRD_MASK); | |
3837 | xhci_writel(xhci, temp, pm_addr); | |
3838 | } | |
3839 | ||
3840 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3841 | return 0; | |
3842 | } | |
3843 | ||
b01bcbf7 SS |
3844 | int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev) |
3845 | { | |
3846 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
3847 | int ret; | |
3848 | ||
3849 | ret = xhci_usb2_software_lpm_test(hcd, udev); | |
3850 | if (!ret) { | |
3851 | xhci_dbg(xhci, "software LPM test succeed\n"); | |
3852 | if (xhci->hw_lpm_support == 1) { | |
3853 | udev->usb2_hw_lpm_capable = 1; | |
3854 | ret = xhci_set_usb2_hardware_lpm(hcd, udev, 1); | |
3855 | if (!ret) | |
3856 | udev->usb2_hw_lpm_enabled = 1; | |
3857 | } | |
3858 | } | |
3859 | ||
3860 | return 0; | |
3861 | } | |
3862 | ||
3863 | #else | |
3864 | ||
3865 | int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd, | |
3866 | struct usb_device *udev, int enable) | |
3867 | { | |
3868 | return 0; | |
3869 | } | |
3870 | ||
3871 | int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev) | |
3872 | { | |
3873 | return 0; | |
3874 | } | |
3875 | ||
3876 | #endif /* CONFIG_USB_SUSPEND */ | |
3877 | ||
3b3db026 SS |
3878 | /*---------------------- USB 3.0 Link PM functions ------------------------*/ |
3879 | ||
b01bcbf7 | 3880 | #ifdef CONFIG_PM |
e3567d2c SS |
3881 | /* Service interval in nanoseconds = 2^(bInterval - 1) * 125us * 1000ns / 1us */ |
3882 | static unsigned long long xhci_service_interval_to_ns( | |
3883 | struct usb_endpoint_descriptor *desc) | |
3884 | { | |
3885 | return (1 << (desc->bInterval - 1)) * 125 * 1000; | |
3886 | } | |
3887 | ||
3b3db026 SS |
3888 | static u16 xhci_get_timeout_no_hub_lpm(struct usb_device *udev, |
3889 | enum usb3_link_state state) | |
3890 | { | |
3891 | unsigned long long sel; | |
3892 | unsigned long long pel; | |
3893 | unsigned int max_sel_pel; | |
3894 | char *state_name; | |
3895 | ||
3896 | switch (state) { | |
3897 | case USB3_LPM_U1: | |
3898 | /* Convert SEL and PEL stored in nanoseconds to microseconds */ | |
3899 | sel = DIV_ROUND_UP(udev->u1_params.sel, 1000); | |
3900 | pel = DIV_ROUND_UP(udev->u1_params.pel, 1000); | |
3901 | max_sel_pel = USB3_LPM_MAX_U1_SEL_PEL; | |
3902 | state_name = "U1"; | |
3903 | break; | |
3904 | case USB3_LPM_U2: | |
3905 | sel = DIV_ROUND_UP(udev->u2_params.sel, 1000); | |
3906 | pel = DIV_ROUND_UP(udev->u2_params.pel, 1000); | |
3907 | max_sel_pel = USB3_LPM_MAX_U2_SEL_PEL; | |
3908 | state_name = "U2"; | |
3909 | break; | |
3910 | default: | |
3911 | dev_warn(&udev->dev, "%s: Can't get timeout for non-U1 or U2 state.\n", | |
3912 | __func__); | |
e25e62ae | 3913 | return USB3_LPM_DISABLED; |
3b3db026 SS |
3914 | } |
3915 | ||
3916 | if (sel <= max_sel_pel && pel <= max_sel_pel) | |
3917 | return USB3_LPM_DEVICE_INITIATED; | |
3918 | ||
3919 | if (sel > max_sel_pel) | |
3920 | dev_dbg(&udev->dev, "Device-initiated %s disabled " | |
3921 | "due to long SEL %llu ms\n", | |
3922 | state_name, sel); | |
3923 | else | |
3924 | dev_dbg(&udev->dev, "Device-initiated %s disabled " | |
3925 | "due to long PEL %llu\n ms", | |
3926 | state_name, pel); | |
3927 | return USB3_LPM_DISABLED; | |
3928 | } | |
3929 | ||
e3567d2c SS |
3930 | /* Returns the hub-encoded U1 timeout value. |
3931 | * The U1 timeout should be the maximum of the following values: | |
3932 | * - For control endpoints, U1 system exit latency (SEL) * 3 | |
3933 | * - For bulk endpoints, U1 SEL * 5 | |
3934 | * - For interrupt endpoints: | |
3935 | * - Notification EPs, U1 SEL * 3 | |
3936 | * - Periodic EPs, max(105% of bInterval, U1 SEL * 2) | |
3937 | * - For isochronous endpoints, max(105% of bInterval, U1 SEL * 2) | |
3938 | */ | |
3939 | static u16 xhci_calculate_intel_u1_timeout(struct usb_device *udev, | |
3940 | struct usb_endpoint_descriptor *desc) | |
3941 | { | |
3942 | unsigned long long timeout_ns; | |
3943 | int ep_type; | |
3944 | int intr_type; | |
3945 | ||
3946 | ep_type = usb_endpoint_type(desc); | |
3947 | switch (ep_type) { | |
3948 | case USB_ENDPOINT_XFER_CONTROL: | |
3949 | timeout_ns = udev->u1_params.sel * 3; | |
3950 | break; | |
3951 | case USB_ENDPOINT_XFER_BULK: | |
3952 | timeout_ns = udev->u1_params.sel * 5; | |
3953 | break; | |
3954 | case USB_ENDPOINT_XFER_INT: | |
3955 | intr_type = usb_endpoint_interrupt_type(desc); | |
3956 | if (intr_type == USB_ENDPOINT_INTR_NOTIFICATION) { | |
3957 | timeout_ns = udev->u1_params.sel * 3; | |
3958 | break; | |
3959 | } | |
3960 | /* Otherwise the calculation is the same as isoc eps */ | |
3961 | case USB_ENDPOINT_XFER_ISOC: | |
3962 | timeout_ns = xhci_service_interval_to_ns(desc); | |
c88db160 | 3963 | timeout_ns = DIV_ROUND_UP_ULL(timeout_ns * 105, 100); |
e3567d2c SS |
3964 | if (timeout_ns < udev->u1_params.sel * 2) |
3965 | timeout_ns = udev->u1_params.sel * 2; | |
3966 | break; | |
3967 | default: | |
3968 | return 0; | |
3969 | } | |
3970 | ||
3971 | /* The U1 timeout is encoded in 1us intervals. */ | |
c88db160 | 3972 | timeout_ns = DIV_ROUND_UP_ULL(timeout_ns, 1000); |
e3567d2c SS |
3973 | /* Don't return a timeout of zero, because that's USB3_LPM_DISABLED. */ |
3974 | if (timeout_ns == USB3_LPM_DISABLED) | |
3975 | timeout_ns++; | |
3976 | ||
3977 | /* If the necessary timeout value is bigger than what we can set in the | |
3978 | * USB 3.0 hub, we have to disable hub-initiated U1. | |
3979 | */ | |
3980 | if (timeout_ns <= USB3_LPM_U1_MAX_TIMEOUT) | |
3981 | return timeout_ns; | |
3982 | dev_dbg(&udev->dev, "Hub-initiated U1 disabled " | |
3983 | "due to long timeout %llu ms\n", timeout_ns); | |
3984 | return xhci_get_timeout_no_hub_lpm(udev, USB3_LPM_U1); | |
3985 | } | |
3986 | ||
3987 | /* Returns the hub-encoded U2 timeout value. | |
3988 | * The U2 timeout should be the maximum of: | |
3989 | * - 10 ms (to avoid the bandwidth impact on the scheduler) | |
3990 | * - largest bInterval of any active periodic endpoint (to avoid going | |
3991 | * into lower power link states between intervals). | |
3992 | * - the U2 Exit Latency of the device | |
3993 | */ | |
3994 | static u16 xhci_calculate_intel_u2_timeout(struct usb_device *udev, | |
3995 | struct usb_endpoint_descriptor *desc) | |
3996 | { | |
3997 | unsigned long long timeout_ns; | |
3998 | unsigned long long u2_del_ns; | |
3999 | ||
4000 | timeout_ns = 10 * 1000 * 1000; | |
4001 | ||
4002 | if ((usb_endpoint_xfer_int(desc) || usb_endpoint_xfer_isoc(desc)) && | |
4003 | (xhci_service_interval_to_ns(desc) > timeout_ns)) | |
4004 | timeout_ns = xhci_service_interval_to_ns(desc); | |
4005 | ||
4006 | u2_del_ns = udev->bos->ss_cap->bU2DevExitLat * 1000; | |
4007 | if (u2_del_ns > timeout_ns) | |
4008 | timeout_ns = u2_del_ns; | |
4009 | ||
4010 | /* The U2 timeout is encoded in 256us intervals */ | |
c88db160 | 4011 | timeout_ns = DIV_ROUND_UP_ULL(timeout_ns, 256 * 1000); |
e3567d2c SS |
4012 | /* If the necessary timeout value is bigger than what we can set in the |
4013 | * USB 3.0 hub, we have to disable hub-initiated U2. | |
4014 | */ | |
4015 | if (timeout_ns <= USB3_LPM_U2_MAX_TIMEOUT) | |
4016 | return timeout_ns; | |
4017 | dev_dbg(&udev->dev, "Hub-initiated U2 disabled " | |
4018 | "due to long timeout %llu ms\n", timeout_ns); | |
4019 | return xhci_get_timeout_no_hub_lpm(udev, USB3_LPM_U2); | |
4020 | } | |
4021 | ||
3b3db026 SS |
4022 | static u16 xhci_call_host_update_timeout_for_endpoint(struct xhci_hcd *xhci, |
4023 | struct usb_device *udev, | |
4024 | struct usb_endpoint_descriptor *desc, | |
4025 | enum usb3_link_state state, | |
4026 | u16 *timeout) | |
4027 | { | |
e3567d2c SS |
4028 | if (state == USB3_LPM_U1) { |
4029 | if (xhci->quirks & XHCI_INTEL_HOST) | |
4030 | return xhci_calculate_intel_u1_timeout(udev, desc); | |
4031 | } else { | |
4032 | if (xhci->quirks & XHCI_INTEL_HOST) | |
4033 | return xhci_calculate_intel_u2_timeout(udev, desc); | |
4034 | } | |
4035 | ||
3b3db026 SS |
4036 | return USB3_LPM_DISABLED; |
4037 | } | |
4038 | ||
4039 | static int xhci_update_timeout_for_endpoint(struct xhci_hcd *xhci, | |
4040 | struct usb_device *udev, | |
4041 | struct usb_endpoint_descriptor *desc, | |
4042 | enum usb3_link_state state, | |
4043 | u16 *timeout) | |
4044 | { | |
4045 | u16 alt_timeout; | |
4046 | ||
4047 | alt_timeout = xhci_call_host_update_timeout_for_endpoint(xhci, udev, | |
4048 | desc, state, timeout); | |
4049 | ||
4050 | /* If we found we can't enable hub-initiated LPM, or | |
4051 | * the U1 or U2 exit latency was too high to allow | |
4052 | * device-initiated LPM as well, just stop searching. | |
4053 | */ | |
4054 | if (alt_timeout == USB3_LPM_DISABLED || | |
4055 | alt_timeout == USB3_LPM_DEVICE_INITIATED) { | |
4056 | *timeout = alt_timeout; | |
4057 | return -E2BIG; | |
4058 | } | |
4059 | if (alt_timeout > *timeout) | |
4060 | *timeout = alt_timeout; | |
4061 | return 0; | |
4062 | } | |
4063 | ||
4064 | static int xhci_update_timeout_for_interface(struct xhci_hcd *xhci, | |
4065 | struct usb_device *udev, | |
4066 | struct usb_host_interface *alt, | |
4067 | enum usb3_link_state state, | |
4068 | u16 *timeout) | |
4069 | { | |
4070 | int j; | |
4071 | ||
4072 | for (j = 0; j < alt->desc.bNumEndpoints; j++) { | |
4073 | if (xhci_update_timeout_for_endpoint(xhci, udev, | |
4074 | &alt->endpoint[j].desc, state, timeout)) | |
4075 | return -E2BIG; | |
4076 | continue; | |
4077 | } | |
4078 | return 0; | |
4079 | } | |
4080 | ||
e3567d2c SS |
4081 | static int xhci_check_intel_tier_policy(struct usb_device *udev, |
4082 | enum usb3_link_state state) | |
4083 | { | |
4084 | struct usb_device *parent; | |
4085 | unsigned int num_hubs; | |
4086 | ||
4087 | if (state == USB3_LPM_U2) | |
4088 | return 0; | |
4089 | ||
4090 | /* Don't enable U1 if the device is on a 2nd tier hub or lower. */ | |
4091 | for (parent = udev->parent, num_hubs = 0; parent->parent; | |
4092 | parent = parent->parent) | |
4093 | num_hubs++; | |
4094 | ||
4095 | if (num_hubs < 2) | |
4096 | return 0; | |
4097 | ||
4098 | dev_dbg(&udev->dev, "Disabling U1 link state for device" | |
4099 | " below second-tier hub.\n"); | |
4100 | dev_dbg(&udev->dev, "Plug device into first-tier hub " | |
4101 | "to decrease power consumption.\n"); | |
4102 | return -E2BIG; | |
4103 | } | |
4104 | ||
3b3db026 SS |
4105 | static int xhci_check_tier_policy(struct xhci_hcd *xhci, |
4106 | struct usb_device *udev, | |
4107 | enum usb3_link_state state) | |
4108 | { | |
e3567d2c SS |
4109 | if (xhci->quirks & XHCI_INTEL_HOST) |
4110 | return xhci_check_intel_tier_policy(udev, state); | |
3b3db026 SS |
4111 | return -EINVAL; |
4112 | } | |
4113 | ||
4114 | /* Returns the U1 or U2 timeout that should be enabled. | |
4115 | * If the tier check or timeout setting functions return with a non-zero exit | |
4116 | * code, that means the timeout value has been finalized and we shouldn't look | |
4117 | * at any more endpoints. | |
4118 | */ | |
4119 | static u16 xhci_calculate_lpm_timeout(struct usb_hcd *hcd, | |
4120 | struct usb_device *udev, enum usb3_link_state state) | |
4121 | { | |
4122 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
4123 | struct usb_host_config *config; | |
4124 | char *state_name; | |
4125 | int i; | |
4126 | u16 timeout = USB3_LPM_DISABLED; | |
4127 | ||
4128 | if (state == USB3_LPM_U1) | |
4129 | state_name = "U1"; | |
4130 | else if (state == USB3_LPM_U2) | |
4131 | state_name = "U2"; | |
4132 | else { | |
4133 | dev_warn(&udev->dev, "Can't enable unknown link state %i\n", | |
4134 | state); | |
4135 | return timeout; | |
4136 | } | |
4137 | ||
4138 | if (xhci_check_tier_policy(xhci, udev, state) < 0) | |
4139 | return timeout; | |
4140 | ||
4141 | /* Gather some information about the currently installed configuration | |
4142 | * and alternate interface settings. | |
4143 | */ | |
4144 | if (xhci_update_timeout_for_endpoint(xhci, udev, &udev->ep0.desc, | |
4145 | state, &timeout)) | |
4146 | return timeout; | |
4147 | ||
4148 | config = udev->actconfig; | |
4149 | if (!config) | |
4150 | return timeout; | |
4151 | ||
4152 | for (i = 0; i < USB_MAXINTERFACES; i++) { | |
4153 | struct usb_driver *driver; | |
4154 | struct usb_interface *intf = config->interface[i]; | |
4155 | ||
4156 | if (!intf) | |
4157 | continue; | |
4158 | ||
4159 | /* Check if any currently bound drivers want hub-initiated LPM | |
4160 | * disabled. | |
4161 | */ | |
4162 | if (intf->dev.driver) { | |
4163 | driver = to_usb_driver(intf->dev.driver); | |
4164 | if (driver && driver->disable_hub_initiated_lpm) { | |
4165 | dev_dbg(&udev->dev, "Hub-initiated %s disabled " | |
4166 | "at request of driver %s\n", | |
4167 | state_name, driver->name); | |
4168 | return xhci_get_timeout_no_hub_lpm(udev, state); | |
4169 | } | |
4170 | } | |
4171 | ||
4172 | /* Not sure how this could happen... */ | |
4173 | if (!intf->cur_altsetting) | |
4174 | continue; | |
4175 | ||
4176 | if (xhci_update_timeout_for_interface(xhci, udev, | |
4177 | intf->cur_altsetting, | |
4178 | state, &timeout)) | |
4179 | return timeout; | |
4180 | } | |
4181 | return timeout; | |
4182 | } | |
4183 | ||
4184 | /* | |
4185 | * Issue an Evaluate Context command to change the Maximum Exit Latency in the | |
4186 | * slot context. If that succeeds, store the new MEL in the xhci_virt_device. | |
4187 | */ | |
4188 | static int xhci_change_max_exit_latency(struct xhci_hcd *xhci, | |
4189 | struct usb_device *udev, u16 max_exit_latency) | |
4190 | { | |
4191 | struct xhci_virt_device *virt_dev; | |
4192 | struct xhci_command *command; | |
4193 | struct xhci_input_control_ctx *ctrl_ctx; | |
4194 | struct xhci_slot_ctx *slot_ctx; | |
4195 | unsigned long flags; | |
4196 | int ret; | |
4197 | ||
4198 | spin_lock_irqsave(&xhci->lock, flags); | |
4199 | if (max_exit_latency == xhci->devs[udev->slot_id]->current_mel) { | |
4200 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4201 | return 0; | |
4202 | } | |
4203 | ||
4204 | /* Attempt to issue an Evaluate Context command to change the MEL. */ | |
4205 | virt_dev = xhci->devs[udev->slot_id]; | |
4206 | command = xhci->lpm_command; | |
4207 | xhci_slot_copy(xhci, command->in_ctx, virt_dev->out_ctx); | |
4208 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4209 | ||
4210 | ctrl_ctx = xhci_get_input_control_ctx(xhci, command->in_ctx); | |
4211 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); | |
4212 | slot_ctx = xhci_get_slot_ctx(xhci, command->in_ctx); | |
4213 | slot_ctx->dev_info2 &= cpu_to_le32(~((u32) MAX_EXIT)); | |
4214 | slot_ctx->dev_info2 |= cpu_to_le32(max_exit_latency); | |
4215 | ||
4216 | xhci_dbg(xhci, "Set up evaluate context for LPM MEL change.\n"); | |
4217 | xhci_dbg(xhci, "Slot %u Input Context:\n", udev->slot_id); | |
4218 | xhci_dbg_ctx(xhci, command->in_ctx, 0); | |
4219 | ||
4220 | /* Issue and wait for the evaluate context command. */ | |
4221 | ret = xhci_configure_endpoint(xhci, udev, command, | |
4222 | true, true); | |
4223 | xhci_dbg(xhci, "Slot %u Output Context:\n", udev->slot_id); | |
4224 | xhci_dbg_ctx(xhci, virt_dev->out_ctx, 0); | |
4225 | ||
4226 | if (!ret) { | |
4227 | spin_lock_irqsave(&xhci->lock, flags); | |
4228 | virt_dev->current_mel = max_exit_latency; | |
4229 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4230 | } | |
4231 | return ret; | |
4232 | } | |
4233 | ||
4234 | static int calculate_max_exit_latency(struct usb_device *udev, | |
4235 | enum usb3_link_state state_changed, | |
4236 | u16 hub_encoded_timeout) | |
4237 | { | |
4238 | unsigned long long u1_mel_us = 0; | |
4239 | unsigned long long u2_mel_us = 0; | |
4240 | unsigned long long mel_us = 0; | |
4241 | bool disabling_u1; | |
4242 | bool disabling_u2; | |
4243 | bool enabling_u1; | |
4244 | bool enabling_u2; | |
4245 | ||
4246 | disabling_u1 = (state_changed == USB3_LPM_U1 && | |
4247 | hub_encoded_timeout == USB3_LPM_DISABLED); | |
4248 | disabling_u2 = (state_changed == USB3_LPM_U2 && | |
4249 | hub_encoded_timeout == USB3_LPM_DISABLED); | |
4250 | ||
4251 | enabling_u1 = (state_changed == USB3_LPM_U1 && | |
4252 | hub_encoded_timeout != USB3_LPM_DISABLED); | |
4253 | enabling_u2 = (state_changed == USB3_LPM_U2 && | |
4254 | hub_encoded_timeout != USB3_LPM_DISABLED); | |
4255 | ||
4256 | /* If U1 was already enabled and we're not disabling it, | |
4257 | * or we're going to enable U1, account for the U1 max exit latency. | |
4258 | */ | |
4259 | if ((udev->u1_params.timeout != USB3_LPM_DISABLED && !disabling_u1) || | |
4260 | enabling_u1) | |
4261 | u1_mel_us = DIV_ROUND_UP(udev->u1_params.mel, 1000); | |
4262 | if ((udev->u2_params.timeout != USB3_LPM_DISABLED && !disabling_u2) || | |
4263 | enabling_u2) | |
4264 | u2_mel_us = DIV_ROUND_UP(udev->u2_params.mel, 1000); | |
4265 | ||
4266 | if (u1_mel_us > u2_mel_us) | |
4267 | mel_us = u1_mel_us; | |
4268 | else | |
4269 | mel_us = u2_mel_us; | |
4270 | /* xHCI host controller max exit latency field is only 16 bits wide. */ | |
4271 | if (mel_us > MAX_EXIT) { | |
4272 | dev_warn(&udev->dev, "Link PM max exit latency of %lluus " | |
4273 | "is too big.\n", mel_us); | |
4274 | return -E2BIG; | |
4275 | } | |
4276 | return mel_us; | |
4277 | } | |
4278 | ||
4279 | /* Returns the USB3 hub-encoded value for the U1/U2 timeout. */ | |
4280 | int xhci_enable_usb3_lpm_timeout(struct usb_hcd *hcd, | |
4281 | struct usb_device *udev, enum usb3_link_state state) | |
4282 | { | |
4283 | struct xhci_hcd *xhci; | |
4284 | u16 hub_encoded_timeout; | |
4285 | int mel; | |
4286 | int ret; | |
4287 | ||
4288 | xhci = hcd_to_xhci(hcd); | |
4289 | /* The LPM timeout values are pretty host-controller specific, so don't | |
4290 | * enable hub-initiated timeouts unless the vendor has provided | |
4291 | * information about their timeout algorithm. | |
4292 | */ | |
4293 | if (!xhci || !(xhci->quirks & XHCI_LPM_SUPPORT) || | |
4294 | !xhci->devs[udev->slot_id]) | |
4295 | return USB3_LPM_DISABLED; | |
4296 | ||
4297 | hub_encoded_timeout = xhci_calculate_lpm_timeout(hcd, udev, state); | |
4298 | mel = calculate_max_exit_latency(udev, state, hub_encoded_timeout); | |
4299 | if (mel < 0) { | |
4300 | /* Max Exit Latency is too big, disable LPM. */ | |
4301 | hub_encoded_timeout = USB3_LPM_DISABLED; | |
4302 | mel = 0; | |
4303 | } | |
4304 | ||
4305 | ret = xhci_change_max_exit_latency(xhci, udev, mel); | |
4306 | if (ret) | |
4307 | return ret; | |
4308 | return hub_encoded_timeout; | |
4309 | } | |
4310 | ||
4311 | int xhci_disable_usb3_lpm_timeout(struct usb_hcd *hcd, | |
4312 | struct usb_device *udev, enum usb3_link_state state) | |
4313 | { | |
4314 | struct xhci_hcd *xhci; | |
4315 | u16 mel; | |
4316 | int ret; | |
4317 | ||
4318 | xhci = hcd_to_xhci(hcd); | |
4319 | if (!xhci || !(xhci->quirks & XHCI_LPM_SUPPORT) || | |
4320 | !xhci->devs[udev->slot_id]) | |
4321 | return 0; | |
4322 | ||
4323 | mel = calculate_max_exit_latency(udev, state, USB3_LPM_DISABLED); | |
4324 | ret = xhci_change_max_exit_latency(xhci, udev, mel); | |
4325 | if (ret) | |
4326 | return ret; | |
4327 | return 0; | |
4328 | } | |
b01bcbf7 | 4329 | #else /* CONFIG_PM */ |
9574323c | 4330 | |
b01bcbf7 SS |
4331 | int xhci_enable_usb3_lpm_timeout(struct usb_hcd *hcd, |
4332 | struct usb_device *udev, enum usb3_link_state state) | |
65580b43 | 4333 | { |
b01bcbf7 | 4334 | return USB3_LPM_DISABLED; |
65580b43 AX |
4335 | } |
4336 | ||
b01bcbf7 SS |
4337 | int xhci_disable_usb3_lpm_timeout(struct usb_hcd *hcd, |
4338 | struct usb_device *udev, enum usb3_link_state state) | |
9574323c AX |
4339 | { |
4340 | return 0; | |
4341 | } | |
b01bcbf7 | 4342 | #endif /* CONFIG_PM */ |
9574323c | 4343 | |
b01bcbf7 | 4344 | /*-------------------------------------------------------------------------*/ |
9574323c | 4345 | |
ac1c1b7f SS |
4346 | /* Once a hub descriptor is fetched for a device, we need to update the xHC's |
4347 | * internal data structures for the device. | |
4348 | */ | |
4349 | int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev, | |
4350 | struct usb_tt *tt, gfp_t mem_flags) | |
4351 | { | |
4352 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
4353 | struct xhci_virt_device *vdev; | |
4354 | struct xhci_command *config_cmd; | |
4355 | struct xhci_input_control_ctx *ctrl_ctx; | |
4356 | struct xhci_slot_ctx *slot_ctx; | |
4357 | unsigned long flags; | |
4358 | unsigned think_time; | |
4359 | int ret; | |
4360 | ||
4361 | /* Ignore root hubs */ | |
4362 | if (!hdev->parent) | |
4363 | return 0; | |
4364 | ||
4365 | vdev = xhci->devs[hdev->slot_id]; | |
4366 | if (!vdev) { | |
4367 | xhci_warn(xhci, "Cannot update hub desc for unknown device.\n"); | |
4368 | return -EINVAL; | |
4369 | } | |
a1d78c16 | 4370 | config_cmd = xhci_alloc_command(xhci, true, true, mem_flags); |
ac1c1b7f SS |
4371 | if (!config_cmd) { |
4372 | xhci_dbg(xhci, "Could not allocate xHCI command structure.\n"); | |
4373 | return -ENOMEM; | |
4374 | } | |
4375 | ||
4376 | spin_lock_irqsave(&xhci->lock, flags); | |
839c817c SS |
4377 | if (hdev->speed == USB_SPEED_HIGH && |
4378 | xhci_alloc_tt_info(xhci, vdev, hdev, tt, GFP_ATOMIC)) { | |
4379 | xhci_dbg(xhci, "Could not allocate xHCI TT structure.\n"); | |
4380 | xhci_free_command(xhci, config_cmd); | |
4381 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4382 | return -ENOMEM; | |
4383 | } | |
4384 | ||
ac1c1b7f SS |
4385 | xhci_slot_copy(xhci, config_cmd->in_ctx, vdev->out_ctx); |
4386 | ctrl_ctx = xhci_get_input_control_ctx(xhci, config_cmd->in_ctx); | |
28ccd296 | 4387 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
ac1c1b7f | 4388 | slot_ctx = xhci_get_slot_ctx(xhci, config_cmd->in_ctx); |
28ccd296 | 4389 | slot_ctx->dev_info |= cpu_to_le32(DEV_HUB); |
ac1c1b7f | 4390 | if (tt->multi) |
28ccd296 | 4391 | slot_ctx->dev_info |= cpu_to_le32(DEV_MTT); |
ac1c1b7f SS |
4392 | if (xhci->hci_version > 0x95) { |
4393 | xhci_dbg(xhci, "xHCI version %x needs hub " | |
4394 | "TT think time and number of ports\n", | |
4395 | (unsigned int) xhci->hci_version); | |
28ccd296 | 4396 | slot_ctx->dev_info2 |= cpu_to_le32(XHCI_MAX_PORTS(hdev->maxchild)); |
ac1c1b7f SS |
4397 | /* Set TT think time - convert from ns to FS bit times. |
4398 | * 0 = 8 FS bit times, 1 = 16 FS bit times, | |
4399 | * 2 = 24 FS bit times, 3 = 32 FS bit times. | |
700b4173 AX |
4400 | * |
4401 | * xHCI 1.0: this field shall be 0 if the device is not a | |
4402 | * High-spped hub. | |
ac1c1b7f SS |
4403 | */ |
4404 | think_time = tt->think_time; | |
4405 | if (think_time != 0) | |
4406 | think_time = (think_time / 666) - 1; | |
700b4173 AX |
4407 | if (xhci->hci_version < 0x100 || hdev->speed == USB_SPEED_HIGH) |
4408 | slot_ctx->tt_info |= | |
4409 | cpu_to_le32(TT_THINK_TIME(think_time)); | |
ac1c1b7f SS |
4410 | } else { |
4411 | xhci_dbg(xhci, "xHCI version %x doesn't need hub " | |
4412 | "TT think time or number of ports\n", | |
4413 | (unsigned int) xhci->hci_version); | |
4414 | } | |
4415 | slot_ctx->dev_state = 0; | |
4416 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4417 | ||
4418 | xhci_dbg(xhci, "Set up %s for hub device.\n", | |
4419 | (xhci->hci_version > 0x95) ? | |
4420 | "configure endpoint" : "evaluate context"); | |
4421 | xhci_dbg(xhci, "Slot %u Input Context:\n", hdev->slot_id); | |
4422 | xhci_dbg_ctx(xhci, config_cmd->in_ctx, 0); | |
4423 | ||
4424 | /* Issue and wait for the configure endpoint or | |
4425 | * evaluate context command. | |
4426 | */ | |
4427 | if (xhci->hci_version > 0x95) | |
4428 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, | |
4429 | false, false); | |
4430 | else | |
4431 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, | |
4432 | true, false); | |
4433 | ||
4434 | xhci_dbg(xhci, "Slot %u Output Context:\n", hdev->slot_id); | |
4435 | xhci_dbg_ctx(xhci, vdev->out_ctx, 0); | |
4436 | ||
4437 | xhci_free_command(xhci, config_cmd); | |
4438 | return ret; | |
4439 | } | |
4440 | ||
66d4eadd SS |
4441 | int xhci_get_frame(struct usb_hcd *hcd) |
4442 | { | |
4443 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
4444 | /* EHCI mods by the periodic size. Why? */ | |
4445 | return xhci_readl(xhci, &xhci->run_regs->microframe_index) >> 3; | |
4446 | } | |
4447 | ||
552e0c4f SAS |
4448 | int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) |
4449 | { | |
4450 | struct xhci_hcd *xhci; | |
4451 | struct device *dev = hcd->self.controller; | |
4452 | int retval; | |
4453 | u32 temp; | |
4454 | ||
fdaf8b31 AX |
4455 | /* Accept arbitrarily long scatter-gather lists */ |
4456 | hcd->self.sg_tablesize = ~0; | |
19181bc5 HG |
4457 | /* XHCI controllers don't stop the ep queue on short packets :| */ |
4458 | hcd->self.no_stop_on_short = 1; | |
552e0c4f SAS |
4459 | |
4460 | if (usb_hcd_is_primary_hcd(hcd)) { | |
4461 | xhci = kzalloc(sizeof(struct xhci_hcd), GFP_KERNEL); | |
4462 | if (!xhci) | |
4463 | return -ENOMEM; | |
4464 | *((struct xhci_hcd **) hcd->hcd_priv) = xhci; | |
4465 | xhci->main_hcd = hcd; | |
4466 | /* Mark the first roothub as being USB 2.0. | |
4467 | * The xHCI driver will register the USB 3.0 roothub. | |
4468 | */ | |
4469 | hcd->speed = HCD_USB2; | |
4470 | hcd->self.root_hub->speed = USB_SPEED_HIGH; | |
4471 | /* | |
4472 | * USB 2.0 roothub under xHCI has an integrated TT, | |
4473 | * (rate matching hub) as opposed to having an OHCI/UHCI | |
4474 | * companion controller. | |
4475 | */ | |
4476 | hcd->has_tt = 1; | |
4477 | } else { | |
4478 | /* xHCI private pointer was set in xhci_pci_probe for the second | |
4479 | * registered roothub. | |
4480 | */ | |
4481 | xhci = hcd_to_xhci(hcd); | |
4482 | temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params); | |
4483 | if (HCC_64BIT_ADDR(temp)) { | |
4484 | xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n"); | |
4485 | dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)); | |
4486 | } else { | |
4487 | dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32)); | |
4488 | } | |
4489 | return 0; | |
4490 | } | |
4491 | ||
4492 | xhci->cap_regs = hcd->regs; | |
4493 | xhci->op_regs = hcd->regs + | |
4494 | HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase)); | |
4495 | xhci->run_regs = hcd->regs + | |
4496 | (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK); | |
4497 | /* Cache read-only capability registers */ | |
4498 | xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1); | |
4499 | xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2); | |
4500 | xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3); | |
4501 | xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hc_capbase); | |
4502 | xhci->hci_version = HC_VERSION(xhci->hcc_params); | |
4503 | xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params); | |
4504 | xhci_print_registers(xhci); | |
4505 | ||
4506 | get_quirks(dev, xhci); | |
4507 | ||
4508 | /* Make sure the HC is halted. */ | |
4509 | retval = xhci_halt(xhci); | |
4510 | if (retval) | |
4511 | goto error; | |
4512 | ||
4513 | xhci_dbg(xhci, "Resetting HCD\n"); | |
4514 | /* Reset the internal HC memory state and registers. */ | |
4515 | retval = xhci_reset(xhci); | |
4516 | if (retval) | |
4517 | goto error; | |
4518 | xhci_dbg(xhci, "Reset complete\n"); | |
4519 | ||
4520 | temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params); | |
4521 | if (HCC_64BIT_ADDR(temp)) { | |
4522 | xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n"); | |
4523 | dma_set_mask(hcd->self.controller, DMA_BIT_MASK(64)); | |
4524 | } else { | |
4525 | dma_set_mask(hcd->self.controller, DMA_BIT_MASK(32)); | |
4526 | } | |
4527 | ||
4528 | xhci_dbg(xhci, "Calling HCD init\n"); | |
4529 | /* Initialize HCD and host controller data structures. */ | |
4530 | retval = xhci_init(hcd); | |
4531 | if (retval) | |
4532 | goto error; | |
4533 | xhci_dbg(xhci, "Called HCD init\n"); | |
4534 | return 0; | |
4535 | error: | |
4536 | kfree(xhci); | |
4537 | return retval; | |
4538 | } | |
4539 | ||
66d4eadd SS |
4540 | MODULE_DESCRIPTION(DRIVER_DESC); |
4541 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
4542 | MODULE_LICENSE("GPL"); | |
4543 | ||
4544 | static int __init xhci_hcd_init(void) | |
4545 | { | |
0cc47d54 | 4546 | int retval; |
66d4eadd SS |
4547 | |
4548 | retval = xhci_register_pci(); | |
66d4eadd SS |
4549 | if (retval < 0) { |
4550 | printk(KERN_DEBUG "Problem registering PCI driver."); | |
4551 | return retval; | |
4552 | } | |
3429e91a SAS |
4553 | retval = xhci_register_plat(); |
4554 | if (retval < 0) { | |
4555 | printk(KERN_DEBUG "Problem registering platform driver."); | |
4556 | goto unreg_pci; | |
4557 | } | |
98441973 SS |
4558 | /* |
4559 | * Check the compiler generated sizes of structures that must be laid | |
4560 | * out in specific ways for hardware access. | |
4561 | */ | |
4562 | BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8); | |
4563 | BUILD_BUG_ON(sizeof(struct xhci_slot_ctx) != 8*32/8); | |
4564 | BUILD_BUG_ON(sizeof(struct xhci_ep_ctx) != 8*32/8); | |
4565 | /* xhci_device_control has eight fields, and also | |
4566 | * embeds one xhci_slot_ctx and 31 xhci_ep_ctx | |
4567 | */ | |
98441973 SS |
4568 | BUILD_BUG_ON(sizeof(struct xhci_stream_ctx) != 4*32/8); |
4569 | BUILD_BUG_ON(sizeof(union xhci_trb) != 4*32/8); | |
4570 | BUILD_BUG_ON(sizeof(struct xhci_erst_entry) != 4*32/8); | |
4571 | BUILD_BUG_ON(sizeof(struct xhci_cap_regs) != 7*32/8); | |
4572 | BUILD_BUG_ON(sizeof(struct xhci_intr_reg) != 8*32/8); | |
4573 | /* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */ | |
4574 | BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8); | |
66d4eadd | 4575 | return 0; |
3429e91a SAS |
4576 | unreg_pci: |
4577 | xhci_unregister_pci(); | |
4578 | return retval; | |
66d4eadd SS |
4579 | } |
4580 | module_init(xhci_hcd_init); | |
4581 | ||
4582 | static void __exit xhci_hcd_cleanup(void) | |
4583 | { | |
66d4eadd | 4584 | xhci_unregister_pci(); |
3429e91a | 4585 | xhci_unregister_plat(); |
66d4eadd SS |
4586 | } |
4587 | module_exit(xhci_hcd_cleanup); |