Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
66d4eadd SS |
2 | /* |
3 | * xHCI host controller driver | |
4 | * | |
5 | * Copyright (C) 2008 Intel Corp. | |
6 | * | |
7 | * Author: Sarah Sharp | |
8 | * Some code borrowed from the Linux EHCI driver. | |
66d4eadd SS |
9 | */ |
10 | ||
43b86af8 | 11 | #include <linux/pci.h> |
ecaa4902 | 12 | #include <linux/iommu.h> |
f7fac17c | 13 | #include <linux/iopoll.h> |
66d4eadd | 14 | #include <linux/irq.h> |
8df75f42 | 15 | #include <linux/log2.h> |
66d4eadd | 16 | #include <linux/module.h> |
b0567b3f | 17 | #include <linux/moduleparam.h> |
5a0e3ad6 | 18 | #include <linux/slab.h> |
71c731a2 | 19 | #include <linux/dmi.h> |
008eb957 | 20 | #include <linux/dma-mapping.h> |
66d4eadd SS |
21 | |
22 | #include "xhci.h" | |
84a99f6f | 23 | #include "xhci-trace.h" |
02b6fdc2 | 24 | #include "xhci-debugfs.h" |
dfba2174 | 25 | #include "xhci-dbgcap.h" |
66d4eadd SS |
26 | |
27 | #define DRIVER_AUTHOR "Sarah Sharp" | |
28 | #define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver" | |
29 | ||
a1377e53 LB |
30 | #define PORT_WAKE_BITS (PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E) |
31 | ||
b0567b3f SS |
32 | /* Some 0.95 hardware can't handle the chain bit on a Link TRB being cleared */ |
33 | static int link_quirk; | |
34 | module_param(link_quirk, int, S_IRUGO | S_IWUSR); | |
35 | MODULE_PARM_DESC(link_quirk, "Don't clear the chain bit on a link TRB"); | |
36 | ||
36b68579 MZ |
37 | static unsigned long long quirks; |
38 | module_param(quirks, ullong, S_IRUGO); | |
4e6a1ee7 TI |
39 | MODULE_PARM_DESC(quirks, "Bit flags for quirks to be enabled as default"); |
40 | ||
4937213b MN |
41 | static bool td_on_ring(struct xhci_td *td, struct xhci_ring *ring) |
42 | { | |
43 | struct xhci_segment *seg = ring->first_seg; | |
44 | ||
45 | if (!td || !td->start_seg) | |
46 | return false; | |
47 | do { | |
48 | if (seg == td->start_seg) | |
49 | return true; | |
50 | seg = seg->next; | |
51 | } while (seg && seg != ring->first_seg); | |
52 | ||
53 | return false; | |
54 | } | |
55 | ||
66d4eadd | 56 | /* |
2611bd18 | 57 | * xhci_handshake - spin reading hc until handshake completes or fails |
66d4eadd SS |
58 | * @ptr: address of hc register to be read |
59 | * @mask: bits to look at in result of read | |
60 | * @done: value of those bits when handshake succeeds | |
61 | * @usec: timeout in microseconds | |
62 | * | |
63 | * Returns negative errno, or zero on success | |
64 | * | |
65 | * Success happens when the "mask" bits have the specified value (hardware | |
66 | * handshake done). There are two failure modes: "usec" have passed (major | |
67 | * hardware flakeout), or the register reads as all-ones (hardware removed). | |
68 | */ | |
14073ce9 | 69 | int xhci_handshake(void __iomem *ptr, u32 mask, u32 done, u64 timeout_us) |
66d4eadd SS |
70 | { |
71 | u32 result; | |
f7fac17c | 72 | int ret; |
66d4eadd | 73 | |
f7fac17c AS |
74 | ret = readl_poll_timeout_atomic(ptr, result, |
75 | (result & mask) == done || | |
76 | result == U32_MAX, | |
14073ce9 | 77 | 1, timeout_us); |
f7fac17c AS |
78 | if (result == U32_MAX) /* card removed */ |
79 | return -ENODEV; | |
80 | ||
81 | return ret; | |
66d4eadd SS |
82 | } |
83 | ||
84 | /* | |
4f0f0bae | 85 | * Disable interrupts and begin the xHCI halting process. |
66d4eadd | 86 | */ |
4f0f0bae | 87 | void xhci_quiesce(struct xhci_hcd *xhci) |
66d4eadd SS |
88 | { |
89 | u32 halted; | |
90 | u32 cmd; | |
91 | u32 mask; | |
92 | ||
66d4eadd | 93 | mask = ~(XHCI_IRQS); |
b0ba9720 | 94 | halted = readl(&xhci->op_regs->status) & STS_HALT; |
66d4eadd SS |
95 | if (!halted) |
96 | mask &= ~CMD_RUN; | |
97 | ||
b0ba9720 | 98 | cmd = readl(&xhci->op_regs->command); |
66d4eadd | 99 | cmd &= mask; |
204b7793 | 100 | writel(cmd, &xhci->op_regs->command); |
4f0f0bae SS |
101 | } |
102 | ||
103 | /* | |
104 | * Force HC into halt state. | |
105 | * | |
106 | * Disable any IRQs and clear the run/stop bit. | |
107 | * HC will complete any current and actively pipelined transactions, and | |
bdfca502 | 108 | * should halt within 16 ms of the run/stop bit being cleared. |
4f0f0bae | 109 | * Read HC Halted bit in the status register to see when the HC is finished. |
4f0f0bae SS |
110 | */ |
111 | int xhci_halt(struct xhci_hcd *xhci) | |
112 | { | |
c6cc27c7 | 113 | int ret; |
c2b0d550 | 114 | |
d195fcff | 115 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, "// Halt the HC"); |
4f0f0bae | 116 | xhci_quiesce(xhci); |
66d4eadd | 117 | |
dc0b177c | 118 | ret = xhci_handshake(&xhci->op_regs->status, |
66d4eadd | 119 | STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC); |
99154fd3 MN |
120 | if (ret) { |
121 | xhci_warn(xhci, "Host halt failed, %d\n", ret); | |
122 | return ret; | |
123 | } | |
c2b0d550 | 124 | |
99154fd3 MN |
125 | xhci->xhc_state |= XHCI_STATE_HALTED; |
126 | xhci->cmd_ring_state = CMD_RING_STATE_STOPPED; | |
c2b0d550 | 127 | |
c6cc27c7 | 128 | return ret; |
66d4eadd SS |
129 | } |
130 | ||
ed07453f SS |
131 | /* |
132 | * Set the run bit and wait for the host to be running. | |
133 | */ | |
26bba5c7 | 134 | int xhci_start(struct xhci_hcd *xhci) |
ed07453f SS |
135 | { |
136 | u32 temp; | |
137 | int ret; | |
138 | ||
b0ba9720 | 139 | temp = readl(&xhci->op_regs->command); |
ed07453f | 140 | temp |= (CMD_RUN); |
d195fcff | 141 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, "// Turn on HC, cmd = 0x%x.", |
ed07453f | 142 | temp); |
204b7793 | 143 | writel(temp, &xhci->op_regs->command); |
ed07453f SS |
144 | |
145 | /* | |
146 | * Wait for the HCHalted Status bit to be 0 to indicate the host is | |
147 | * running. | |
148 | */ | |
dc0b177c | 149 | ret = xhci_handshake(&xhci->op_regs->status, |
ed07453f SS |
150 | STS_HALT, 0, XHCI_MAX_HALT_USEC); |
151 | if (ret == -ETIMEDOUT) | |
152 | xhci_err(xhci, "Host took too long to start, " | |
153 | "waited %u microseconds.\n", | |
154 | XHCI_MAX_HALT_USEC); | |
33e32158 | 155 | if (!ret) { |
98d74f9c MN |
156 | /* clear state flags. Including dying, halted or removing */ |
157 | xhci->xhc_state = 0; | |
33e32158 MN |
158 | xhci->run_graceperiod = jiffies + msecs_to_jiffies(500); |
159 | } | |
e5bfeab0 | 160 | |
ed07453f SS |
161 | return ret; |
162 | } | |
163 | ||
66d4eadd | 164 | /* |
ac04e6ff | 165 | * Reset a halted HC. |
66d4eadd SS |
166 | * |
167 | * This resets pipelines, timers, counters, state machines, etc. | |
168 | * Transactions will be terminated immediately, and operational registers | |
169 | * will be set to their defaults. | |
170 | */ | |
14073ce9 | 171 | int xhci_reset(struct xhci_hcd *xhci, u64 timeout_us) |
66d4eadd SS |
172 | { |
173 | u32 command; | |
174 | u32 state; | |
f6187f42 | 175 | int ret; |
66d4eadd | 176 | |
b0ba9720 | 177 | state = readl(&xhci->op_regs->status); |
c11ae038 MN |
178 | |
179 | if (state == ~(u32)0) { | |
180 | xhci_warn(xhci, "Host not accessible, reset failed.\n"); | |
181 | return -ENODEV; | |
182 | } | |
183 | ||
d3512f63 SS |
184 | if ((state & STS_HALT) == 0) { |
185 | xhci_warn(xhci, "Host controller not halted, aborting reset.\n"); | |
186 | return 0; | |
187 | } | |
66d4eadd | 188 | |
d195fcff | 189 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, "// Reset the HC"); |
b0ba9720 | 190 | command = readl(&xhci->op_regs->command); |
66d4eadd | 191 | command |= CMD_RESET; |
204b7793 | 192 | writel(command, &xhci->op_regs->command); |
66d4eadd | 193 | |
a5964396 RM |
194 | /* Existing Intel xHCI controllers require a delay of 1 mS, |
195 | * after setting the CMD_RESET bit, and before accessing any | |
196 | * HC registers. This allows the HC to complete the | |
197 | * reset operation and be ready for HC register access. | |
198 | * Without this delay, the subsequent HC register access, | |
199 | * may result in a system hang very rarely. | |
200 | */ | |
201 | if (xhci->quirks & XHCI_INTEL_HOST) | |
202 | udelay(1000); | |
203 | ||
14073ce9 | 204 | ret = xhci_handshake(&xhci->op_regs->command, CMD_RESET, 0, timeout_us); |
2d62f3ee SS |
205 | if (ret) |
206 | return ret; | |
207 | ||
9da5a109 JC |
208 | if (xhci->quirks & XHCI_ASMEDIA_MODIFY_FLOWCONTROL) |
209 | usb_asmedia_modifyflowcontrol(to_pci_dev(xhci_to_hcd(xhci)->self.controller)); | |
210 | ||
d195fcff XR |
211 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
212 | "Wait for controller to be ready for doorbell rings"); | |
2d62f3ee SS |
213 | /* |
214 | * xHCI cannot write to any doorbells or operational registers other | |
215 | * than status until the "Controller Not Ready" flag is cleared. | |
216 | */ | |
14073ce9 | 217 | ret = xhci_handshake(&xhci->op_regs->status, STS_CNR, 0, timeout_us); |
f370b996 | 218 | |
f6187f42 MN |
219 | xhci->usb2_rhub.bus_state.port_c_suspend = 0; |
220 | xhci->usb2_rhub.bus_state.suspended_ports = 0; | |
221 | xhci->usb2_rhub.bus_state.resuming_ports = 0; | |
222 | xhci->usb3_rhub.bus_state.port_c_suspend = 0; | |
223 | xhci->usb3_rhub.bus_state.suspended_ports = 0; | |
224 | xhci->usb3_rhub.bus_state.resuming_ports = 0; | |
f370b996 AX |
225 | |
226 | return ret; | |
66d4eadd SS |
227 | } |
228 | ||
12de0a35 MZ |
229 | static void xhci_zero_64b_regs(struct xhci_hcd *xhci) |
230 | { | |
231 | struct device *dev = xhci_to_hcd(xhci)->self.sysdev; | |
ecaa4902 | 232 | struct iommu_domain *domain; |
12de0a35 MZ |
233 | int err, i; |
234 | u64 val; | |
286fd02f | 235 | u32 intrs; |
12de0a35 MZ |
236 | |
237 | /* | |
238 | * Some Renesas controllers get into a weird state if they are | |
239 | * reset while programmed with 64bit addresses (they will preserve | |
240 | * the top half of the address in internal, non visible | |
241 | * registers). You end up with half the address coming from the | |
242 | * kernel, and the other half coming from the firmware. Also, | |
243 | * changing the programming leads to extra accesses even if the | |
244 | * controller is supposed to be halted. The controller ends up with | |
245 | * a fatal fault, and is then ripe for being properly reset. | |
246 | * | |
247 | * Special care is taken to only apply this if the device is behind | |
248 | * an iommu. Doing anything when there is no iommu is definitely | |
249 | * unsafe... | |
250 | */ | |
ecaa4902 SP |
251 | domain = iommu_get_domain_for_dev(dev); |
252 | if (!(xhci->quirks & XHCI_ZERO_64B_REGS) || !domain || | |
253 | domain->type == IOMMU_DOMAIN_IDENTITY) | |
12de0a35 MZ |
254 | return; |
255 | ||
256 | xhci_info(xhci, "Zeroing 64bit base registers, expecting fault\n"); | |
257 | ||
258 | /* Clear HSEIE so that faults do not get signaled */ | |
259 | val = readl(&xhci->op_regs->command); | |
260 | val &= ~CMD_HSEIE; | |
261 | writel(val, &xhci->op_regs->command); | |
262 | ||
263 | /* Clear HSE (aka FATAL) */ | |
264 | val = readl(&xhci->op_regs->status); | |
265 | val |= STS_FATAL; | |
266 | writel(val, &xhci->op_regs->status); | |
267 | ||
268 | /* Now zero the registers, and brace for impact */ | |
269 | val = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); | |
270 | if (upper_32_bits(val)) | |
271 | xhci_write_64(xhci, 0, &xhci->op_regs->dcbaa_ptr); | |
272 | val = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); | |
273 | if (upper_32_bits(val)) | |
274 | xhci_write_64(xhci, 0, &xhci->op_regs->cmd_ring); | |
275 | ||
286fd02f MN |
276 | intrs = min_t(u32, HCS_MAX_INTRS(xhci->hcs_params1), |
277 | ARRAY_SIZE(xhci->run_regs->ir_set)); | |
278 | ||
279 | for (i = 0; i < intrs; i++) { | |
12de0a35 MZ |
280 | struct xhci_intr_reg __iomem *ir; |
281 | ||
282 | ir = &xhci->run_regs->ir_set[i]; | |
283 | val = xhci_read_64(xhci, &ir->erst_base); | |
284 | if (upper_32_bits(val)) | |
285 | xhci_write_64(xhci, 0, &ir->erst_base); | |
286 | val= xhci_read_64(xhci, &ir->erst_dequeue); | |
287 | if (upper_32_bits(val)) | |
288 | xhci_write_64(xhci, 0, &ir->erst_dequeue); | |
289 | } | |
290 | ||
291 | /* Wait for the fault to appear. It will be cleared on reset */ | |
292 | err = xhci_handshake(&xhci->op_regs->status, | |
293 | STS_FATAL, STS_FATAL, | |
294 | XHCI_MAX_HALT_USEC); | |
295 | if (!err) | |
296 | xhci_info(xhci, "Fault detected\n"); | |
297 | } | |
43b86af8 | 298 | |
52dd0483 MN |
299 | static int xhci_enable_interrupter(struct xhci_interrupter *ir) |
300 | { | |
301 | u32 iman; | |
302 | ||
303 | if (!ir || !ir->ir_set) | |
304 | return -EINVAL; | |
305 | ||
306 | iman = readl(&ir->ir_set->irq_pending); | |
307 | writel(ER_IRQ_ENABLE(iman), &ir->ir_set->irq_pending); | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
312 | static int xhci_disable_interrupter(struct xhci_interrupter *ir) | |
313 | { | |
314 | u32 iman; | |
315 | ||
316 | if (!ir || !ir->ir_set) | |
317 | return -EINVAL; | |
318 | ||
319 | iman = readl(&ir->ir_set->irq_pending); | |
320 | writel(ER_IRQ_DISABLE(iman), &ir->ir_set->irq_pending); | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
77d45b45 | 325 | #ifdef CONFIG_USB_PCI |
43b86af8 DN |
326 | /* |
327 | * Set up MSI | |
328 | */ | |
329 | static int xhci_setup_msi(struct xhci_hcd *xhci) | |
66d4eadd SS |
330 | { |
331 | int ret; | |
4c39d4b9 AB |
332 | /* |
333 | * TODO:Check with MSI Soc for sysdev | |
334 | */ | |
43b86af8 DN |
335 | struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); |
336 | ||
77d45b45 CH |
337 | ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI); |
338 | if (ret < 0) { | |
d195fcff XR |
339 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
340 | "failed to allocate MSI entry"); | |
43b86af8 DN |
341 | return ret; |
342 | } | |
343 | ||
851ec164 | 344 | ret = request_irq(pdev->irq, xhci_msi_irq, |
43b86af8 DN |
345 | 0, "xhci_hcd", xhci_to_hcd(xhci)); |
346 | if (ret) { | |
d195fcff XR |
347 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
348 | "disable MSI interrupt"); | |
77d45b45 | 349 | pci_free_irq_vectors(pdev); |
43b86af8 DN |
350 | } |
351 | ||
352 | return ret; | |
353 | } | |
354 | ||
355 | /* | |
356 | * Set up MSI-X | |
357 | */ | |
358 | static int xhci_setup_msix(struct xhci_hcd *xhci) | |
359 | { | |
98d107b8 | 360 | int i, ret; |
0029227f AX |
361 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
362 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
66d4eadd | 363 | |
43b86af8 DN |
364 | /* |
365 | * calculate number of msi-x vectors supported. | |
366 | * - HCS_MAX_INTRS: the max number of interrupts the host can handle, | |
367 | * with max number of interrupters based on the xhci HCSPARAMS1. | |
368 | * - num_online_cpus: maximum msi-x vectors per CPUs core. | |
369 | * Add additional 1 vector to ensure always available interrupt. | |
370 | */ | |
371 | xhci->msix_count = min(num_online_cpus() + 1, | |
372 | HCS_MAX_INTRS(xhci->hcs_params1)); | |
373 | ||
77d45b45 CH |
374 | ret = pci_alloc_irq_vectors(pdev, xhci->msix_count, xhci->msix_count, |
375 | PCI_IRQ_MSIX); | |
376 | if (ret < 0) { | |
d195fcff XR |
377 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
378 | "Failed to enable MSI-X"); | |
77d45b45 | 379 | return ret; |
66d4eadd SS |
380 | } |
381 | ||
43b86af8 | 382 | for (i = 0; i < xhci->msix_count; i++) { |
77d45b45 CH |
383 | ret = request_irq(pci_irq_vector(pdev, i), xhci_msi_irq, 0, |
384 | "xhci_hcd", xhci_to_hcd(xhci)); | |
43b86af8 DN |
385 | if (ret) |
386 | goto disable_msix; | |
66d4eadd | 387 | } |
43b86af8 | 388 | |
0029227f | 389 | hcd->msix_enabled = 1; |
43b86af8 | 390 | return ret; |
66d4eadd SS |
391 | |
392 | disable_msix: | |
d195fcff | 393 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, "disable MSI-X interrupt"); |
77d45b45 CH |
394 | while (--i >= 0) |
395 | free_irq(pci_irq_vector(pdev, i), xhci_to_hcd(xhci)); | |
396 | pci_free_irq_vectors(pdev); | |
66d4eadd SS |
397 | return ret; |
398 | } | |
399 | ||
66d4eadd SS |
400 | /* Free any IRQs and disable MSI-X */ |
401 | static void xhci_cleanup_msix(struct xhci_hcd *xhci) | |
402 | { | |
0029227f AX |
403 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
404 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
66d4eadd | 405 | |
9005355a JP |
406 | if (xhci->quirks & XHCI_PLAT) |
407 | return; | |
408 | ||
77d45b45 CH |
409 | /* return if using legacy interrupt */ |
410 | if (hcd->irq > 0) | |
411 | return; | |
412 | ||
413 | if (hcd->msix_enabled) { | |
414 | int i; | |
43b86af8 | 415 | |
77d45b45 CH |
416 | for (i = 0; i < xhci->msix_count; i++) |
417 | free_irq(pci_irq_vector(pdev, i), xhci_to_hcd(xhci)); | |
43b86af8 | 418 | } else { |
77d45b45 | 419 | free_irq(pci_irq_vector(pdev, 0), xhci_to_hcd(xhci)); |
43b86af8 DN |
420 | } |
421 | ||
77d45b45 | 422 | pci_free_irq_vectors(pdev); |
0029227f | 423 | hcd->msix_enabled = 0; |
66d4eadd | 424 | } |
66d4eadd | 425 | |
d5c82feb | 426 | static void __maybe_unused xhci_msix_sync_irqs(struct xhci_hcd *xhci) |
421aa841 | 427 | { |
77d45b45 CH |
428 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
429 | ||
430 | if (hcd->msix_enabled) { | |
431 | struct pci_dev *pdev = to_pci_dev(hcd->self.controller); | |
432 | int i; | |
421aa841 | 433 | |
421aa841 | 434 | for (i = 0; i < xhci->msix_count; i++) |
77d45b45 | 435 | synchronize_irq(pci_irq_vector(pdev, i)); |
421aa841 SAS |
436 | } |
437 | } | |
438 | ||
439 | static int xhci_try_enable_msi(struct usb_hcd *hcd) | |
440 | { | |
441 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
52fb6125 | 442 | struct pci_dev *pdev; |
421aa841 SAS |
443 | int ret; |
444 | ||
52fb6125 SS |
445 | /* The xhci platform device has set up IRQs through usb_add_hcd. */ |
446 | if (xhci->quirks & XHCI_PLAT) | |
447 | return 0; | |
448 | ||
449 | pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); | |
421aa841 SAS |
450 | /* |
451 | * Some Fresco Logic host controllers advertise MSI, but fail to | |
452 | * generate interrupts. Don't even try to enable MSI. | |
453 | */ | |
454 | if (xhci->quirks & XHCI_BROKEN_MSI) | |
00eed9c8 | 455 | goto legacy_irq; |
421aa841 SAS |
456 | |
457 | /* unregister the legacy interrupt */ | |
458 | if (hcd->irq) | |
459 | free_irq(hcd->irq, hcd); | |
cd70469d | 460 | hcd->irq = 0; |
421aa841 SAS |
461 | |
462 | ret = xhci_setup_msix(xhci); | |
463 | if (ret) | |
464 | /* fall back to msi*/ | |
465 | ret = xhci_setup_msi(xhci); | |
466 | ||
6a29beef PC |
467 | if (!ret) { |
468 | hcd->msi_enabled = 1; | |
421aa841 | 469 | return 0; |
6a29beef | 470 | } |
421aa841 | 471 | |
68d07f64 SS |
472 | if (!pdev->irq) { |
473 | xhci_err(xhci, "No msi-x/msi found and no IRQ in BIOS\n"); | |
474 | return -EINVAL; | |
475 | } | |
476 | ||
00eed9c8 | 477 | legacy_irq: |
79699437 AH |
478 | if (!strlen(hcd->irq_descr)) |
479 | snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", | |
480 | hcd->driver->description, hcd->self.busnum); | |
481 | ||
421aa841 SAS |
482 | /* fall back to legacy interrupt*/ |
483 | ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED, | |
484 | hcd->irq_descr, hcd); | |
485 | if (ret) { | |
486 | xhci_err(xhci, "request interrupt %d failed\n", | |
487 | pdev->irq); | |
488 | return ret; | |
489 | } | |
490 | hcd->irq = pdev->irq; | |
491 | return 0; | |
492 | } | |
493 | ||
494 | #else | |
495 | ||
01bb59eb | 496 | static inline int xhci_try_enable_msi(struct usb_hcd *hcd) |
421aa841 SAS |
497 | { |
498 | return 0; | |
499 | } | |
500 | ||
01bb59eb | 501 | static inline void xhci_cleanup_msix(struct xhci_hcd *xhci) |
421aa841 SAS |
502 | { |
503 | } | |
504 | ||
01bb59eb | 505 | static inline void xhci_msix_sync_irqs(struct xhci_hcd *xhci) |
421aa841 SAS |
506 | { |
507 | } | |
508 | ||
509 | #endif | |
510 | ||
e99e88a9 | 511 | static void compliance_mode_recovery(struct timer_list *t) |
71c731a2 AC |
512 | { |
513 | struct xhci_hcd *xhci; | |
514 | struct usb_hcd *hcd; | |
38986ffa | 515 | struct xhci_hub *rhub; |
71c731a2 AC |
516 | u32 temp; |
517 | int i; | |
518 | ||
e99e88a9 | 519 | xhci = from_timer(xhci, t, comp_mode_recovery_timer); |
38986ffa | 520 | rhub = &xhci->usb3_rhub; |
873f3236 HK |
521 | hcd = rhub->hcd; |
522 | ||
523 | if (!hcd) | |
524 | return; | |
71c731a2 | 525 | |
38986ffa MN |
526 | for (i = 0; i < rhub->num_ports; i++) { |
527 | temp = readl(rhub->ports[i]->addr); | |
71c731a2 AC |
528 | if ((temp & PORT_PLS_MASK) == USB_SS_PORT_LS_COMP_MOD) { |
529 | /* | |
530 | * Compliance Mode Detected. Letting USB Core | |
531 | * handle the Warm Reset | |
532 | */ | |
4bdfe4c3 XR |
533 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
534 | "Compliance mode detected->port %d", | |
71c731a2 | 535 | i + 1); |
4bdfe4c3 XR |
536 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
537 | "Attempting compliance mode recovery"); | |
71c731a2 AC |
538 | |
539 | if (hcd->state == HC_STATE_SUSPENDED) | |
540 | usb_hcd_resume_root_hub(hcd); | |
541 | ||
542 | usb_hcd_poll_rh_status(hcd); | |
543 | } | |
544 | } | |
545 | ||
38986ffa | 546 | if (xhci->port_status_u0 != ((1 << rhub->num_ports) - 1)) |
71c731a2 AC |
547 | mod_timer(&xhci->comp_mode_recovery_timer, |
548 | jiffies + msecs_to_jiffies(COMP_MODE_RCVRY_MSECS)); | |
549 | } | |
550 | ||
551 | /* | |
552 | * Quirk to work around issue generated by the SN65LVPE502CP USB3.0 re-driver | |
553 | * that causes ports behind that hardware to enter compliance mode sometimes. | |
554 | * The quirk creates a timer that polls every 2 seconds the link state of | |
555 | * each host controller's port and recovers it by issuing a Warm reset | |
556 | * if Compliance mode is detected, otherwise the port will become "dead" (no | |
557 | * device connections or disconnections will be detected anymore). Becasue no | |
558 | * status event is generated when entering compliance mode (per xhci spec), | |
559 | * this quirk is needed on systems that have the failing hardware installed. | |
560 | */ | |
561 | static void compliance_mode_recovery_timer_init(struct xhci_hcd *xhci) | |
562 | { | |
563 | xhci->port_status_u0 = 0; | |
e99e88a9 KC |
564 | timer_setup(&xhci->comp_mode_recovery_timer, compliance_mode_recovery, |
565 | 0); | |
71c731a2 AC |
566 | xhci->comp_mode_recovery_timer.expires = jiffies + |
567 | msecs_to_jiffies(COMP_MODE_RCVRY_MSECS); | |
568 | ||
71c731a2 | 569 | add_timer(&xhci->comp_mode_recovery_timer); |
4bdfe4c3 XR |
570 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
571 | "Compliance mode recovery timer initialized"); | |
71c731a2 AC |
572 | } |
573 | ||
574 | /* | |
575 | * This function identifies the systems that have installed the SN65LVPE502CP | |
576 | * USB3.0 re-driver and that need the Compliance Mode Quirk. | |
577 | * Systems: | |
578 | * Vendor: Hewlett-Packard -> System Models: Z420, Z620 and Z820 | |
579 | */ | |
e1cd9727 | 580 | static bool xhci_compliance_mode_recovery_timer_quirk_check(void) |
71c731a2 AC |
581 | { |
582 | const char *dmi_product_name, *dmi_sys_vendor; | |
583 | ||
584 | dmi_product_name = dmi_get_system_info(DMI_PRODUCT_NAME); | |
585 | dmi_sys_vendor = dmi_get_system_info(DMI_SYS_VENDOR); | |
457a73d3 VG |
586 | if (!dmi_product_name || !dmi_sys_vendor) |
587 | return false; | |
71c731a2 AC |
588 | |
589 | if (!(strstr(dmi_sys_vendor, "Hewlett-Packard"))) | |
590 | return false; | |
591 | ||
592 | if (strstr(dmi_product_name, "Z420") || | |
593 | strstr(dmi_product_name, "Z620") || | |
47080974 | 594 | strstr(dmi_product_name, "Z820") || |
b0e4e606 | 595 | strstr(dmi_product_name, "Z1 Workstation")) |
71c731a2 AC |
596 | return true; |
597 | ||
598 | return false; | |
599 | } | |
600 | ||
601 | static int xhci_all_ports_seen_u0(struct xhci_hcd *xhci) | |
602 | { | |
38986ffa | 603 | return (xhci->port_status_u0 == ((1 << xhci->usb3_rhub.num_ports) - 1)); |
71c731a2 AC |
604 | } |
605 | ||
606 | ||
66d4eadd SS |
607 | /* |
608 | * Initialize memory for HCD and xHC (one-time init). | |
609 | * | |
610 | * Program the PAGESIZE register, initialize the device context array, create | |
611 | * device contexts (?), set up a command ring segment (or two?), create event | |
612 | * ring (one for now). | |
613 | */ | |
3969384c | 614 | static int xhci_init(struct usb_hcd *hcd) |
66d4eadd SS |
615 | { |
616 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
98d107b8 | 617 | int retval; |
66d4eadd | 618 | |
d195fcff | 619 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, "xhci_init"); |
66d4eadd | 620 | spin_lock_init(&xhci->lock); |
d7826599 | 621 | if (xhci->hci_version == 0x95 && link_quirk) { |
4bdfe4c3 XR |
622 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
623 | "QUIRK: Not clearing Link TRB chain bits."); | |
b0567b3f SS |
624 | xhci->quirks |= XHCI_LINK_TRB_QUIRK; |
625 | } else { | |
d195fcff XR |
626 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
627 | "xHCI doesn't need link TRB QUIRK"); | |
b0567b3f | 628 | } |
66d4eadd | 629 | retval = xhci_mem_init(xhci, GFP_KERNEL); |
d195fcff | 630 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Finished xhci_init"); |
66d4eadd | 631 | |
71c731a2 | 632 | /* Initializing Compliance Mode Recovery Data If Needed */ |
c3897aa5 | 633 | if (xhci_compliance_mode_recovery_timer_quirk_check()) { |
71c731a2 AC |
634 | xhci->quirks |= XHCI_COMP_MODE_QUIRK; |
635 | compliance_mode_recovery_timer_init(xhci); | |
636 | } | |
637 | ||
66d4eadd SS |
638 | return retval; |
639 | } | |
640 | ||
7f84eef0 SS |
641 | /*-------------------------------------------------------------------------*/ |
642 | ||
f6ff0ac8 SS |
643 | static int xhci_run_finished(struct xhci_hcd *xhci) |
644 | { | |
b17a57f8 | 645 | struct xhci_interrupter *ir = xhci->interrupter; |
a8089250 HX |
646 | unsigned long flags; |
647 | u32 temp; | |
648 | ||
649 | /* | |
650 | * Enable interrupts before starting the host (xhci 4.2 and 5.5.2). | |
651 | * Protect the short window before host is running with a lock | |
652 | */ | |
653 | spin_lock_irqsave(&xhci->lock, flags); | |
654 | ||
655 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Enable interrupts"); | |
656 | temp = readl(&xhci->op_regs->command); | |
657 | temp |= (CMD_EIE); | |
658 | writel(temp, &xhci->op_regs->command); | |
659 | ||
660 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, "Enable primary interrupter"); | |
52dd0483 | 661 | xhci_enable_interrupter(ir); |
a8089250 | 662 | |
f6ff0ac8 SS |
663 | if (xhci_start(xhci)) { |
664 | xhci_halt(xhci); | |
a8089250 | 665 | spin_unlock_irqrestore(&xhci->lock, flags); |
f6ff0ac8 SS |
666 | return -ENODEV; |
667 | } | |
a8089250 | 668 | |
c181bc5b | 669 | xhci->cmd_ring_state = CMD_RING_STATE_RUNNING; |
f6ff0ac8 SS |
670 | |
671 | if (xhci->quirks & XHCI_NEC_HOST) | |
672 | xhci_ring_cmd_db(xhci); | |
673 | ||
a8089250 HX |
674 | spin_unlock_irqrestore(&xhci->lock, flags); |
675 | ||
f6ff0ac8 SS |
676 | return 0; |
677 | } | |
678 | ||
66d4eadd SS |
679 | /* |
680 | * Start the HC after it was halted. | |
681 | * | |
682 | * This function is called by the USB core when the HC driver is added. | |
683 | * Its opposite is xhci_stop(). | |
684 | * | |
685 | * xhci_init() must be called once before this function can be called. | |
686 | * Reset the HC, enable device slot contexts, program DCBAAP, and | |
687 | * set command ring pointer and event ring pointer. | |
688 | * | |
689 | * Setup MSI-X vectors and enable interrupts. | |
690 | */ | |
691 | int xhci_run(struct usb_hcd *hcd) | |
692 | { | |
693 | u32 temp; | |
8e595a5d | 694 | u64 temp_64; |
3fd1ec58 | 695 | int ret; |
66d4eadd | 696 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); |
b17a57f8 | 697 | struct xhci_interrupter *ir = xhci->interrupter; |
f6ff0ac8 SS |
698 | /* Start the xHCI host controller running only after the USB 2.0 roothub |
699 | * is setup. | |
700 | */ | |
66d4eadd | 701 | |
0f2a7930 | 702 | hcd->uses_new_polling = 1; |
f6ff0ac8 SS |
703 | if (!usb_hcd_is_primary_hcd(hcd)) |
704 | return xhci_run_finished(xhci); | |
0f2a7930 | 705 | |
d195fcff | 706 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, "xhci_run"); |
43b86af8 | 707 | |
3fd1ec58 | 708 | ret = xhci_try_enable_msi(hcd); |
43b86af8 | 709 | if (ret) |
3fd1ec58 | 710 | return ret; |
66d4eadd | 711 | |
b17a57f8 | 712 | temp_64 = xhci_read_64(xhci, &ir->ir_set->erst_dequeue); |
66e49d87 | 713 | temp_64 &= ~ERST_PTR_MASK; |
d195fcff XR |
714 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
715 | "ERST deq = 64'h%0lx", (long unsigned int) temp_64); | |
66e49d87 | 716 | |
d195fcff XR |
717 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
718 | "// Set the interrupt modulation register"); | |
b17a57f8 | 719 | temp = readl(&ir->ir_set->irq_control); |
a4d88302 | 720 | temp &= ~ER_IRQ_INTERVAL_MASK; |
ab725cbe | 721 | temp |= (xhci->imod_interval / 250) & ER_IRQ_INTERVAL_MASK; |
b17a57f8 | 722 | writel(temp, &ir->ir_set->irq_control); |
66d4eadd | 723 | |
ddba5cd0 MN |
724 | if (xhci->quirks & XHCI_NEC_HOST) { |
725 | struct xhci_command *command; | |
74e0b564 | 726 | |
103afda0 | 727 | command = xhci_alloc_command(xhci, false, GFP_KERNEL); |
ddba5cd0 MN |
728 | if (!command) |
729 | return -ENOMEM; | |
74e0b564 | 730 | |
d6f5f071 | 731 | ret = xhci_queue_vendor_command(xhci, command, 0, 0, 0, |
0238634d | 732 | TRB_TYPE(TRB_NEC_GET_FW)); |
d6f5f071 SW |
733 | if (ret) |
734 | xhci_free_command(xhci, command); | |
ddba5cd0 | 735 | } |
d195fcff | 736 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
873f3236 | 737 | "Finished %s for main hcd", __func__); |
02b6fdc2 | 738 | |
5c44d9d7 | 739 | xhci_create_dbc_dev(xhci); |
dfba2174 | 740 | |
02b6fdc2 LB |
741 | xhci_debugfs_init(xhci); |
742 | ||
873f3236 HK |
743 | if (xhci_has_one_roothub(xhci)) |
744 | return xhci_run_finished(xhci); | |
745 | ||
1bd8bb7d MN |
746 | set_bit(HCD_FLAG_DEFER_RH_REGISTER, &hcd->flags); |
747 | ||
f6ff0ac8 SS |
748 | return 0; |
749 | } | |
436e8c7d | 750 | EXPORT_SYMBOL_GPL(xhci_run); |
ed07453f | 751 | |
66d4eadd SS |
752 | /* |
753 | * Stop xHCI driver. | |
754 | * | |
755 | * This function is called by the USB core when the HC driver is removed. | |
756 | * Its opposite is xhci_run(). | |
757 | * | |
758 | * Disable device contexts, disable IRQs, and quiesce the HC. | |
759 | * Reset the HC, finish any completed transactions, and cleanup memory. | |
760 | */ | |
3969384c | 761 | static void xhci_stop(struct usb_hcd *hcd) |
66d4eadd SS |
762 | { |
763 | u32 temp; | |
764 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
52dd0483 | 765 | struct xhci_interrupter *ir = xhci->interrupter; |
66d4eadd | 766 | |
8c24d6d7 | 767 | mutex_lock(&xhci->mutex); |
8c24d6d7 | 768 | |
fe190ed0 | 769 | /* Only halt host and free memory after both hcds are removed */ |
27a41a83 GKB |
770 | if (!usb_hcd_is_primary_hcd(hcd)) { |
771 | mutex_unlock(&xhci->mutex); | |
772 | return; | |
773 | } | |
66d4eadd | 774 | |
5c44d9d7 | 775 | xhci_remove_dbc_dev(xhci); |
dfba2174 | 776 | |
fe190ed0 JS |
777 | spin_lock_irq(&xhci->lock); |
778 | xhci->xhc_state |= XHCI_STATE_HALTED; | |
779 | xhci->cmd_ring_state = CMD_RING_STATE_STOPPED; | |
780 | xhci_halt(xhci); | |
14073ce9 | 781 | xhci_reset(xhci, XHCI_RESET_SHORT_USEC); |
fe190ed0 JS |
782 | spin_unlock_irq(&xhci->lock); |
783 | ||
40a9fb17 ZR |
784 | xhci_cleanup_msix(xhci); |
785 | ||
71c731a2 AC |
786 | /* Deleting Compliance Mode Recovery Timer */ |
787 | if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && | |
58b1d799 | 788 | (!(xhci_all_ports_seen_u0(xhci)))) { |
71c731a2 | 789 | del_timer_sync(&xhci->comp_mode_recovery_timer); |
4bdfe4c3 XR |
790 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
791 | "%s: compliance mode recovery timer deleted", | |
58b1d799 TC |
792 | __func__); |
793 | } | |
71c731a2 | 794 | |
c41136b0 AX |
795 | if (xhci->quirks & XHCI_AMD_PLL_FIX) |
796 | usb_amd_dev_put(); | |
797 | ||
d195fcff XR |
798 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
799 | "// Disabling event ring interrupts"); | |
b0ba9720 | 800 | temp = readl(&xhci->op_regs->status); |
d1001ab4 | 801 | writel((temp & ~0x1fff) | STS_EINT, &xhci->op_regs->status); |
52dd0483 | 802 | xhci_disable_interrupter(ir); |
66d4eadd | 803 | |
d195fcff | 804 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, "cleaning up memory"); |
66d4eadd | 805 | xhci_mem_cleanup(xhci); |
11cd764d | 806 | xhci_debugfs_exit(xhci); |
d195fcff XR |
807 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
808 | "xhci_stop completed - status = %x", | |
b0ba9720 | 809 | readl(&xhci->op_regs->status)); |
85ac90f8 | 810 | mutex_unlock(&xhci->mutex); |
66d4eadd SS |
811 | } |
812 | ||
813 | /* | |
814 | * Shutdown HC (not bus-specific) | |
815 | * | |
816 | * This is called when the machine is rebooting or halting. We assume that the | |
817 | * machine will be powered off, and the HC's internal state will be reset. | |
818 | * Don't bother to free memory. | |
f6ff0ac8 SS |
819 | * |
820 | * This will only ever be called with the main usb_hcd (the USB3 roothub). | |
66d4eadd | 821 | */ |
f2c710f7 | 822 | void xhci_shutdown(struct usb_hcd *hcd) |
66d4eadd SS |
823 | { |
824 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
825 | ||
052c7f9f | 826 | if (xhci->quirks & XHCI_SPURIOUS_REBOOT) |
4c39d4b9 | 827 | usb_disable_xhci_ports(to_pci_dev(hcd->self.sysdev)); |
e95829f4 | 828 | |
dc92944a HL |
829 | /* Don't poll the roothubs after shutdown. */ |
830 | xhci_dbg(xhci, "%s: stopping usb%d port polling.\n", | |
831 | __func__, hcd->self.busnum); | |
832 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
833 | del_timer_sync(&hcd->rh_timer); | |
834 | ||
835 | if (xhci->shared_hcd) { | |
836 | clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); | |
837 | del_timer_sync(&xhci->shared_hcd->rh_timer); | |
838 | } | |
839 | ||
8531aa16 | 840 | spin_lock_irq(&xhci->lock); |
66d4eadd | 841 | xhci_halt(xhci); |
34cd2db4 MN |
842 | |
843 | /* | |
844 | * Workaround for spurious wakeps at shutdown with HSW, and for boot | |
845 | * firmware delay in ADL-P PCH if port are left in U3 at shutdown | |
846 | */ | |
847 | if (xhci->quirks & XHCI_SPURIOUS_WAKEUP || | |
848 | xhci->quirks & XHCI_RESET_TO_DEFAULT) | |
14073ce9 | 849 | xhci_reset(xhci, XHCI_RESET_SHORT_USEC); |
34cd2db4 | 850 | |
8531aa16 | 851 | spin_unlock_irq(&xhci->lock); |
66d4eadd | 852 | |
40a9fb17 ZR |
853 | xhci_cleanup_msix(xhci); |
854 | ||
d195fcff XR |
855 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
856 | "xhci_shutdown completed - status = %x", | |
b0ba9720 | 857 | readl(&xhci->op_regs->status)); |
66d4eadd | 858 | } |
f2c710f7 | 859 | EXPORT_SYMBOL_GPL(xhci_shutdown); |
66d4eadd | 860 | |
b5b5c3ac | 861 | #ifdef CONFIG_PM |
5535b1d5 AX |
862 | static void xhci_save_registers(struct xhci_hcd *xhci) |
863 | { | |
b17a57f8 MN |
864 | struct xhci_interrupter *ir = xhci->interrupter; |
865 | ||
b0ba9720 XR |
866 | xhci->s3.command = readl(&xhci->op_regs->command); |
867 | xhci->s3.dev_nt = readl(&xhci->op_regs->dev_notification); | |
f7b2e403 | 868 | xhci->s3.dcbaa_ptr = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); |
b0ba9720 | 869 | xhci->s3.config_reg = readl(&xhci->op_regs->config_reg); |
b17a57f8 MN |
870 | |
871 | if (!ir) | |
872 | return; | |
873 | ||
874 | ir->s3_erst_size = readl(&ir->ir_set->erst_size); | |
875 | ir->s3_erst_base = xhci_read_64(xhci, &ir->ir_set->erst_base); | |
876 | ir->s3_erst_dequeue = xhci_read_64(xhci, &ir->ir_set->erst_dequeue); | |
877 | ir->s3_irq_pending = readl(&ir->ir_set->irq_pending); | |
878 | ir->s3_irq_control = readl(&ir->ir_set->irq_control); | |
5535b1d5 AX |
879 | } |
880 | ||
881 | static void xhci_restore_registers(struct xhci_hcd *xhci) | |
882 | { | |
b17a57f8 MN |
883 | struct xhci_interrupter *ir = xhci->interrupter; |
884 | ||
204b7793 XR |
885 | writel(xhci->s3.command, &xhci->op_regs->command); |
886 | writel(xhci->s3.dev_nt, &xhci->op_regs->dev_notification); | |
477632df | 887 | xhci_write_64(xhci, xhci->s3.dcbaa_ptr, &xhci->op_regs->dcbaa_ptr); |
204b7793 | 888 | writel(xhci->s3.config_reg, &xhci->op_regs->config_reg); |
b17a57f8 MN |
889 | writel(ir->s3_erst_size, &ir->ir_set->erst_size); |
890 | xhci_write_64(xhci, ir->s3_erst_base, &ir->ir_set->erst_base); | |
891 | xhci_write_64(xhci, ir->s3_erst_dequeue, &ir->ir_set->erst_dequeue); | |
892 | writel(ir->s3_irq_pending, &ir->ir_set->irq_pending); | |
893 | writel(ir->s3_irq_control, &ir->ir_set->irq_control); | |
5535b1d5 AX |
894 | } |
895 | ||
89821320 SS |
896 | static void xhci_set_cmd_ring_deq(struct xhci_hcd *xhci) |
897 | { | |
898 | u64 val_64; | |
899 | ||
900 | /* step 2: initialize command ring buffer */ | |
f7b2e403 | 901 | val_64 = xhci_read_64(xhci, &xhci->op_regs->cmd_ring); |
89821320 SS |
902 | val_64 = (val_64 & (u64) CMD_RING_RSVD_BITS) | |
903 | (xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg, | |
904 | xhci->cmd_ring->dequeue) & | |
905 | (u64) ~CMD_RING_RSVD_BITS) | | |
906 | xhci->cmd_ring->cycle_state; | |
d195fcff XR |
907 | xhci_dbg_trace(xhci, trace_xhci_dbg_init, |
908 | "// Setting command ring address to 0x%llx", | |
89821320 | 909 | (long unsigned long) val_64); |
477632df | 910 | xhci_write_64(xhci, val_64, &xhci->op_regs->cmd_ring); |
89821320 SS |
911 | } |
912 | ||
913 | /* | |
914 | * The whole command ring must be cleared to zero when we suspend the host. | |
915 | * | |
916 | * The host doesn't save the command ring pointer in the suspend well, so we | |
917 | * need to re-program it on resume. Unfortunately, the pointer must be 64-byte | |
918 | * aligned, because of the reserved bits in the command ring dequeue pointer | |
919 | * register. Therefore, we can't just set the dequeue pointer back in the | |
920 | * middle of the ring (TRBs are 16-byte aligned). | |
921 | */ | |
922 | static void xhci_clear_command_ring(struct xhci_hcd *xhci) | |
923 | { | |
924 | struct xhci_ring *ring; | |
925 | struct xhci_segment *seg; | |
926 | ||
927 | ring = xhci->cmd_ring; | |
928 | seg = ring->deq_seg; | |
929 | do { | |
158886cd AX |
930 | memset(seg->trbs, 0, |
931 | sizeof(union xhci_trb) * (TRBS_PER_SEGMENT - 1)); | |
932 | seg->trbs[TRBS_PER_SEGMENT - 1].link.control &= | |
933 | cpu_to_le32(~TRB_CYCLE); | |
89821320 SS |
934 | seg = seg->next; |
935 | } while (seg != ring->deq_seg); | |
936 | ||
937 | /* Reset the software enqueue and dequeue pointers */ | |
938 | ring->deq_seg = ring->first_seg; | |
939 | ring->dequeue = ring->first_seg->trbs; | |
940 | ring->enq_seg = ring->deq_seg; | |
941 | ring->enqueue = ring->dequeue; | |
942 | ||
b008df60 | 943 | ring->num_trbs_free = ring->num_segs * (TRBS_PER_SEGMENT - 1) - 1; |
89821320 SS |
944 | /* |
945 | * Ring is now zeroed, so the HW should look for change of ownership | |
946 | * when the cycle bit is set to 1. | |
947 | */ | |
948 | ring->cycle_state = 1; | |
949 | ||
950 | /* | |
951 | * Reset the hardware dequeue pointer. | |
952 | * Yes, this will need to be re-written after resume, but we're paranoid | |
953 | * and want to make sure the hardware doesn't access bogus memory | |
954 | * because, say, the BIOS or an SMI started the host without changing | |
955 | * the command ring pointers. | |
956 | */ | |
957 | xhci_set_cmd_ring_deq(xhci); | |
958 | } | |
959 | ||
d26c00e7 MN |
960 | /* |
961 | * Disable port wake bits if do_wakeup is not set. | |
962 | * | |
963 | * Also clear a possible internal port wake state left hanging for ports that | |
964 | * detected termination but never successfully enumerated (trained to 0U). | |
965 | * Internal wake causes immediate xHCI wake after suspend. PORT_CSC write done | |
966 | * at enumeration clears this wake, force one here as well for unconnected ports | |
967 | */ | |
968 | ||
969 | static void xhci_disable_hub_port_wake(struct xhci_hcd *xhci, | |
970 | struct xhci_hub *rhub, | |
971 | bool do_wakeup) | |
a1377e53 | 972 | { |
a1377e53 | 973 | unsigned long flags; |
d70d5a84 | 974 | u32 t1, t2, portsc; |
d26c00e7 | 975 | int i; |
a1377e53 LB |
976 | |
977 | spin_lock_irqsave(&xhci->lock, flags); | |
978 | ||
d26c00e7 MN |
979 | for (i = 0; i < rhub->num_ports; i++) { |
980 | portsc = readl(rhub->ports[i]->addr); | |
981 | t1 = xhci_port_state_to_neutral(portsc); | |
982 | t2 = t1; | |
983 | ||
984 | /* clear wake bits if do_wake is not set */ | |
985 | if (!do_wakeup) | |
986 | t2 &= ~PORT_WAKE_BITS; | |
987 | ||
988 | /* Don't touch csc bit if connected or connect change is set */ | |
989 | if (!(portsc & (PORT_CSC | PORT_CONNECT))) | |
990 | t2 |= PORT_CSC; | |
a1377e53 | 991 | |
d70d5a84 | 992 | if (t1 != t2) { |
d26c00e7 MN |
993 | writel(t2, rhub->ports[i]->addr); |
994 | xhci_dbg(xhci, "config port %d-%d wake bits, portsc: 0x%x, write: 0x%x\n", | |
995 | rhub->hcd->self.busnum, i + 1, portsc, t2); | |
d70d5a84 | 996 | } |
a1377e53 | 997 | } |
a1377e53 LB |
998 | spin_unlock_irqrestore(&xhci->lock, flags); |
999 | } | |
1000 | ||
229bc19f MN |
1001 | static bool xhci_pending_portevent(struct xhci_hcd *xhci) |
1002 | { | |
1003 | struct xhci_port **ports; | |
1004 | int port_index; | |
1005 | u32 status; | |
1006 | u32 portsc; | |
1007 | ||
1008 | status = readl(&xhci->op_regs->status); | |
1009 | if (status & STS_EINT) | |
1010 | return true; | |
1011 | /* | |
1012 | * Checking STS_EINT is not enough as there is a lag between a change | |
1013 | * bit being set and the Port Status Change Event that it generated | |
1014 | * being written to the Event Ring. See note in xhci 1.1 section 4.19.2. | |
1015 | */ | |
1016 | ||
1017 | port_index = xhci->usb2_rhub.num_ports; | |
1018 | ports = xhci->usb2_rhub.ports; | |
1019 | while (port_index--) { | |
1020 | portsc = readl(ports[port_index]->addr); | |
1021 | if (portsc & PORT_CHANGE_MASK || | |
1022 | (portsc & PORT_PLS_MASK) == XDEV_RESUME) | |
1023 | return true; | |
1024 | } | |
1025 | port_index = xhci->usb3_rhub.num_ports; | |
1026 | ports = xhci->usb3_rhub.ports; | |
1027 | while (port_index--) { | |
1028 | portsc = readl(ports[port_index]->addr); | |
1029 | if (portsc & PORT_CHANGE_MASK || | |
1030 | (portsc & PORT_PLS_MASK) == XDEV_RESUME) | |
1031 | return true; | |
1032 | } | |
1033 | return false; | |
1034 | } | |
1035 | ||
5535b1d5 AX |
1036 | /* |
1037 | * Stop HC (not bus-specific) | |
1038 | * | |
1039 | * This is called when the machine transition into S3/S4 mode. | |
1040 | * | |
1041 | */ | |
a1377e53 | 1042 | int xhci_suspend(struct xhci_hcd *xhci, bool do_wakeup) |
5535b1d5 AX |
1043 | { |
1044 | int rc = 0; | |
7c67cf66 | 1045 | unsigned int delay = XHCI_MAX_HALT_USEC * 2; |
5535b1d5 AX |
1046 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
1047 | u32 command; | |
a7d57abc | 1048 | u32 res; |
5535b1d5 | 1049 | |
9fa733f2 RQ |
1050 | if (!hcd->state) |
1051 | return 0; | |
1052 | ||
77b84767 | 1053 | if (hcd->state != HC_STATE_SUSPENDED || |
873f3236 | 1054 | (xhci->shared_hcd && xhci->shared_hcd->state != HC_STATE_SUSPENDED)) |
77b84767 FB |
1055 | return -EINVAL; |
1056 | ||
a1377e53 | 1057 | /* Clear root port wake on bits if wakeup not allowed. */ |
d26c00e7 MN |
1058 | xhci_disable_hub_port_wake(xhci, &xhci->usb3_rhub, do_wakeup); |
1059 | xhci_disable_hub_port_wake(xhci, &xhci->usb2_rhub, do_wakeup); | |
a1377e53 | 1060 | |
18a367e8 PC |
1061 | if (!HCD_HW_ACCESSIBLE(hcd)) |
1062 | return 0; | |
1063 | ||
1064 | xhci_dbc_suspend(xhci); | |
1065 | ||
c52804a4 | 1066 | /* Don't poll the roothubs on bus suspend. */ |
669bc5a1 MN |
1067 | xhci_dbg(xhci, "%s: stopping usb%d port polling.\n", |
1068 | __func__, hcd->self.busnum); | |
c52804a4 SS |
1069 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
1070 | del_timer_sync(&hcd->rh_timer); | |
873f3236 HK |
1071 | if (xhci->shared_hcd) { |
1072 | clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); | |
1073 | del_timer_sync(&xhci->shared_hcd->rh_timer); | |
1074 | } | |
c52804a4 | 1075 | |
191edc5e KHF |
1076 | if (xhci->quirks & XHCI_SUSPEND_DELAY) |
1077 | usleep_range(1000, 1500); | |
1078 | ||
5535b1d5 AX |
1079 | spin_lock_irq(&xhci->lock); |
1080 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
873f3236 HK |
1081 | if (xhci->shared_hcd) |
1082 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags); | |
5535b1d5 AX |
1083 | /* step 1: stop endpoint */ |
1084 | /* skipped assuming that port suspend has done */ | |
1085 | ||
1086 | /* step 2: clear Run/Stop bit */ | |
b0ba9720 | 1087 | command = readl(&xhci->op_regs->command); |
5535b1d5 | 1088 | command &= ~CMD_RUN; |
204b7793 | 1089 | writel(command, &xhci->op_regs->command); |
455f5892 ON |
1090 | |
1091 | /* Some chips from Fresco Logic need an extraordinary delay */ | |
1092 | delay *= (xhci->quirks & XHCI_SLOW_SUSPEND) ? 10 : 1; | |
1093 | ||
dc0b177c | 1094 | if (xhci_handshake(&xhci->op_regs->status, |
455f5892 | 1095 | STS_HALT, STS_HALT, delay)) { |
5535b1d5 AX |
1096 | xhci_warn(xhci, "WARN: xHC CMD_RUN timeout\n"); |
1097 | spin_unlock_irq(&xhci->lock); | |
1098 | return -ETIMEDOUT; | |
1099 | } | |
89821320 | 1100 | xhci_clear_command_ring(xhci); |
5535b1d5 AX |
1101 | |
1102 | /* step 3: save registers */ | |
1103 | xhci_save_registers(xhci); | |
1104 | ||
1105 | /* step 4: set CSS flag */ | |
b0ba9720 | 1106 | command = readl(&xhci->op_regs->command); |
5535b1d5 | 1107 | command |= CMD_CSS; |
204b7793 | 1108 | writel(command, &xhci->op_regs->command); |
a7d57abc | 1109 | xhci->broken_suspend = 0; |
dc0b177c | 1110 | if (xhci_handshake(&xhci->op_regs->status, |
ac343366 | 1111 | STS_SAVE, 0, 20 * 1000)) { |
a7d57abc SS |
1112 | /* |
1113 | * AMD SNPS xHC 3.0 occasionally does not clear the | |
1114 | * SSS bit of USBSTS and when driver tries to poll | |
1115 | * to see if the xHC clears BIT(8) which never happens | |
1116 | * and driver assumes that controller is not responding | |
1117 | * and times out. To workaround this, its good to check | |
1118 | * if SRE and HCE bits are not set (as per xhci | |
1119 | * Section 5.4.2) and bypass the timeout. | |
1120 | */ | |
1121 | res = readl(&xhci->op_regs->status); | |
1122 | if ((xhci->quirks & XHCI_SNPS_BROKEN_SUSPEND) && | |
1123 | (((res & STS_SRE) == 0) && | |
1124 | ((res & STS_HCE) == 0))) { | |
1125 | xhci->broken_suspend = 1; | |
1126 | } else { | |
1127 | xhci_warn(xhci, "WARN: xHC save state timeout\n"); | |
1128 | spin_unlock_irq(&xhci->lock); | |
1129 | return -ETIMEDOUT; | |
1130 | } | |
5535b1d5 | 1131 | } |
5535b1d5 AX |
1132 | spin_unlock_irq(&xhci->lock); |
1133 | ||
71c731a2 AC |
1134 | /* |
1135 | * Deleting Compliance Mode Recovery Timer because the xHCI Host | |
1136 | * is about to be suspended. | |
1137 | */ | |
1138 | if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && | |
1139 | (!(xhci_all_ports_seen_u0(xhci)))) { | |
1140 | del_timer_sync(&xhci->comp_mode_recovery_timer); | |
4bdfe4c3 XR |
1141 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
1142 | "%s: compliance mode recovery timer deleted", | |
58b1d799 | 1143 | __func__); |
71c731a2 AC |
1144 | } |
1145 | ||
0029227f AX |
1146 | /* step 5: remove core well power */ |
1147 | /* synchronize irq when using MSI-X */ | |
421aa841 | 1148 | xhci_msix_sync_irqs(xhci); |
0029227f | 1149 | |
5535b1d5 AX |
1150 | return rc; |
1151 | } | |
436e8c7d | 1152 | EXPORT_SYMBOL_GPL(xhci_suspend); |
5535b1d5 AX |
1153 | |
1154 | /* | |
1155 | * start xHC (not bus-specific) | |
1156 | * | |
1157 | * This is called when the machine transition from S3/S4 mode. | |
1158 | * | |
1159 | */ | |
1160 | int xhci_resume(struct xhci_hcd *xhci, bool hibernated) | |
1161 | { | |
229bc19f | 1162 | u32 command, temp = 0; |
5535b1d5 | 1163 | struct usb_hcd *hcd = xhci_to_hcd(xhci); |
f69e3120 | 1164 | int retval = 0; |
77df9e0b | 1165 | bool comp_timer_running = false; |
253f588c | 1166 | bool pending_portevent = false; |
8b328f80 | 1167 | bool reinit_xhc = false; |
5535b1d5 | 1168 | |
9fa733f2 RQ |
1169 | if (!hcd->state) |
1170 | return 0; | |
1171 | ||
f6ff0ac8 | 1172 | /* Wait a bit if either of the roothubs need to settle from the |
25985edc | 1173 | * transition into bus suspend. |
20b67cf5 | 1174 | */ |
f6187f42 MN |
1175 | |
1176 | if (time_before(jiffies, xhci->usb2_rhub.bus_state.next_statechange) || | |
1177 | time_before(jiffies, xhci->usb3_rhub.bus_state.next_statechange)) | |
5535b1d5 AX |
1178 | msleep(100); |
1179 | ||
f69e3120 | 1180 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
873f3236 HK |
1181 | if (xhci->shared_hcd) |
1182 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &xhci->shared_hcd->flags); | |
f69e3120 | 1183 | |
5535b1d5 AX |
1184 | spin_lock_irq(&xhci->lock); |
1185 | ||
8b328f80 PH |
1186 | if (hibernated || xhci->quirks & XHCI_RESET_ON_RESUME || xhci->broken_suspend) |
1187 | reinit_xhc = true; | |
1188 | ||
1189 | if (!reinit_xhc) { | |
a70bcbc3 RT |
1190 | /* |
1191 | * Some controllers might lose power during suspend, so wait | |
1192 | * for controller not ready bit to clear, just as in xHC init. | |
1193 | */ | |
1194 | retval = xhci_handshake(&xhci->op_regs->status, | |
1195 | STS_CNR, 0, 10 * 1000 * 1000); | |
1196 | if (retval) { | |
1197 | xhci_warn(xhci, "Controller not ready at resume %d\n", | |
1198 | retval); | |
1199 | spin_unlock_irq(&xhci->lock); | |
1200 | return retval; | |
1201 | } | |
5535b1d5 AX |
1202 | /* step 1: restore register */ |
1203 | xhci_restore_registers(xhci); | |
1204 | /* step 2: initialize command ring buffer */ | |
89821320 | 1205 | xhci_set_cmd_ring_deq(xhci); |
5535b1d5 AX |
1206 | /* step 3: restore state and start state*/ |
1207 | /* step 3: set CRS flag */ | |
b0ba9720 | 1208 | command = readl(&xhci->op_regs->command); |
5535b1d5 | 1209 | command |= CMD_CRS; |
204b7793 | 1210 | writel(command, &xhci->op_regs->command); |
305886ca AG |
1211 | /* |
1212 | * Some controllers take up to 55+ ms to complete the controller | |
1213 | * restore so setting the timeout to 100ms. Xhci specification | |
1214 | * doesn't mention any timeout value. | |
1215 | */ | |
dc0b177c | 1216 | if (xhci_handshake(&xhci->op_regs->status, |
305886ca | 1217 | STS_RESTORE, 0, 100 * 1000)) { |
622eb783 | 1218 | xhci_warn(xhci, "WARN: xHC restore state timeout\n"); |
5535b1d5 AX |
1219 | spin_unlock_irq(&xhci->lock); |
1220 | return -ETIMEDOUT; | |
1221 | } | |
5535b1d5 AX |
1222 | } |
1223 | ||
8b328f80 | 1224 | temp = readl(&xhci->op_regs->status); |
77df9e0b | 1225 | |
8b328f80 PH |
1226 | /* re-initialize the HC on Restore Error, or Host Controller Error */ |
1227 | if (temp & (STS_SRE | STS_HCE)) { | |
1228 | reinit_xhc = true; | |
484d6f7a ML |
1229 | if (!xhci->broken_suspend) |
1230 | xhci_warn(xhci, "xHC error in resume, USBSTS 0x%x, Reinit\n", temp); | |
8b328f80 | 1231 | } |
77df9e0b | 1232 | |
8b328f80 | 1233 | if (reinit_xhc) { |
77df9e0b TC |
1234 | if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && |
1235 | !(xhci_all_ports_seen_u0(xhci))) { | |
1236 | del_timer_sync(&xhci->comp_mode_recovery_timer); | |
4bdfe4c3 XR |
1237 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
1238 | "Compliance Mode Recovery Timer deleted!"); | |
77df9e0b TC |
1239 | } |
1240 | ||
fedd383e SS |
1241 | /* Let the USB core know _both_ roothubs lost power. */ |
1242 | usb_root_hub_lost_power(xhci->main_hcd->self.root_hub); | |
873f3236 HK |
1243 | if (xhci->shared_hcd) |
1244 | usb_root_hub_lost_power(xhci->shared_hcd->self.root_hub); | |
5535b1d5 AX |
1245 | |
1246 | xhci_dbg(xhci, "Stop HCD\n"); | |
1247 | xhci_halt(xhci); | |
12de0a35 | 1248 | xhci_zero_64b_regs(xhci); |
14073ce9 | 1249 | retval = xhci_reset(xhci, XHCI_RESET_LONG_USEC); |
5535b1d5 | 1250 | spin_unlock_irq(&xhci->lock); |
72ae1947 MN |
1251 | if (retval) |
1252 | return retval; | |
0029227f | 1253 | xhci_cleanup_msix(xhci); |
5535b1d5 | 1254 | |
5535b1d5 | 1255 | xhci_dbg(xhci, "// Disabling event ring interrupts\n"); |
b0ba9720 | 1256 | temp = readl(&xhci->op_regs->status); |
d1001ab4 | 1257 | writel((temp & ~0x1fff) | STS_EINT, &xhci->op_regs->status); |
52dd0483 | 1258 | xhci_disable_interrupter(xhci->interrupter); |
5535b1d5 AX |
1259 | |
1260 | xhci_dbg(xhci, "cleaning up memory\n"); | |
1261 | xhci_mem_cleanup(xhci); | |
d9167671 | 1262 | xhci_debugfs_exit(xhci); |
5535b1d5 | 1263 | xhci_dbg(xhci, "xhci_stop completed - status = %x\n", |
b0ba9720 | 1264 | readl(&xhci->op_regs->status)); |
5535b1d5 | 1265 | |
65b22f93 SS |
1266 | /* USB core calls the PCI reinit and start functions twice: |
1267 | * first with the primary HCD, and then with the secondary HCD. | |
1268 | * If we don't do the same, the host will never be started. | |
1269 | */ | |
65b22f93 | 1270 | xhci_dbg(xhci, "Initialize the xhci_hcd\n"); |
802dcafc | 1271 | retval = xhci_init(hcd); |
5535b1d5 AX |
1272 | if (retval) |
1273 | return retval; | |
77df9e0b TC |
1274 | comp_timer_running = true; |
1275 | ||
65b22f93 | 1276 | xhci_dbg(xhci, "Start the primary HCD\n"); |
802dcafc MN |
1277 | retval = xhci_run(hcd); |
1278 | if (!retval && xhci->shared_hcd) { | |
f69e3120 | 1279 | xhci_dbg(xhci, "Start the secondary HCD\n"); |
802dcafc | 1280 | retval = xhci_run(xhci->shared_hcd); |
b3209379 | 1281 | } |
802dcafc | 1282 | |
5535b1d5 | 1283 | hcd->state = HC_STATE_SUSPENDED; |
873f3236 HK |
1284 | if (xhci->shared_hcd) |
1285 | xhci->shared_hcd->state = HC_STATE_SUSPENDED; | |
f69e3120 | 1286 | goto done; |
5535b1d5 AX |
1287 | } |
1288 | ||
5535b1d5 | 1289 | /* step 4: set Run/Stop bit */ |
b0ba9720 | 1290 | command = readl(&xhci->op_regs->command); |
5535b1d5 | 1291 | command |= CMD_RUN; |
204b7793 | 1292 | writel(command, &xhci->op_regs->command); |
dc0b177c | 1293 | xhci_handshake(&xhci->op_regs->status, STS_HALT, |
5535b1d5 AX |
1294 | 0, 250 * 1000); |
1295 | ||
1296 | /* step 5: walk topology and initialize portsc, | |
1297 | * portpmsc and portli | |
1298 | */ | |
1299 | /* this is done in bus_resume */ | |
1300 | ||
1301 | /* step 6: restart each of the previously | |
1302 | * Running endpoints by ringing their doorbells | |
1303 | */ | |
1304 | ||
5535b1d5 | 1305 | spin_unlock_irq(&xhci->lock); |
f69e3120 | 1306 | |
dfba2174 LB |
1307 | xhci_dbc_resume(xhci); |
1308 | ||
f69e3120 AS |
1309 | done: |
1310 | if (retval == 0) { | |
253f588c MN |
1311 | /* |
1312 | * Resume roothubs only if there are pending events. | |
1313 | * USB 3 devices resend U3 LFPS wake after a 100ms delay if | |
1314 | * the first wake signalling failed, give it that chance. | |
1315 | */ | |
1316 | pending_portevent = xhci_pending_portevent(xhci); | |
1317 | if (!pending_portevent) { | |
1318 | msleep(120); | |
1319 | pending_portevent = xhci_pending_portevent(xhci); | |
1320 | } | |
1321 | ||
1322 | if (pending_portevent) { | |
873f3236 HK |
1323 | if (xhci->shared_hcd) |
1324 | usb_hcd_resume_root_hub(xhci->shared_hcd); | |
671ffdff | 1325 | usb_hcd_resume_root_hub(hcd); |
d6236f6d | 1326 | } |
f69e3120 | 1327 | } |
71c731a2 AC |
1328 | /* |
1329 | * If system is subject to the Quirk, Compliance Mode Timer needs to | |
1330 | * be re-initialized Always after a system resume. Ports are subject | |
1331 | * to suffer the Compliance Mode issue again. It doesn't matter if | |
1332 | * ports have entered previously to U0 before system's suspension. | |
1333 | */ | |
77df9e0b | 1334 | if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && !comp_timer_running) |
71c731a2 AC |
1335 | compliance_mode_recovery_timer_init(xhci); |
1336 | ||
9da5a109 JC |
1337 | if (xhci->quirks & XHCI_ASMEDIA_MODIFY_FLOWCONTROL) |
1338 | usb_asmedia_modifyflowcontrol(to_pci_dev(hcd->self.controller)); | |
1339 | ||
c52804a4 | 1340 | /* Re-enable port polling. */ |
669bc5a1 MN |
1341 | xhci_dbg(xhci, "%s: starting usb%d port polling.\n", |
1342 | __func__, hcd->self.busnum); | |
873f3236 HK |
1343 | if (xhci->shared_hcd) { |
1344 | set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); | |
1345 | usb_hcd_poll_rh_status(xhci->shared_hcd); | |
1346 | } | |
671ffdff MN |
1347 | set_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
1348 | usb_hcd_poll_rh_status(hcd); | |
c52804a4 | 1349 | |
f69e3120 | 1350 | return retval; |
5535b1d5 | 1351 | } |
436e8c7d | 1352 | EXPORT_SYMBOL_GPL(xhci_resume); |
b5b5c3ac SS |
1353 | #endif /* CONFIG_PM */ |
1354 | ||
7f84eef0 SS |
1355 | /*-------------------------------------------------------------------------*/ |
1356 | ||
2017a1e5 TJ |
1357 | static int xhci_map_temp_buffer(struct usb_hcd *hcd, struct urb *urb) |
1358 | { | |
1359 | void *temp; | |
1360 | int ret = 0; | |
1361 | unsigned int buf_len; | |
1362 | enum dma_data_direction dir; | |
1363 | ||
1364 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
1365 | buf_len = urb->transfer_buffer_length; | |
1366 | ||
1367 | temp = kzalloc_node(buf_len, GFP_ATOMIC, | |
1368 | dev_to_node(hcd->self.sysdev)); | |
1369 | ||
1370 | if (usb_urb_dir_out(urb)) | |
1371 | sg_pcopy_to_buffer(urb->sg, urb->num_sgs, | |
1372 | temp, buf_len, 0); | |
1373 | ||
1374 | urb->transfer_buffer = temp; | |
1375 | urb->transfer_dma = dma_map_single(hcd->self.sysdev, | |
1376 | urb->transfer_buffer, | |
1377 | urb->transfer_buffer_length, | |
1378 | dir); | |
1379 | ||
1380 | if (dma_mapping_error(hcd->self.sysdev, | |
1381 | urb->transfer_dma)) { | |
1382 | ret = -EAGAIN; | |
1383 | kfree(temp); | |
1384 | } else { | |
1385 | urb->transfer_flags |= URB_DMA_MAP_SINGLE; | |
1386 | } | |
1387 | ||
1388 | return ret; | |
1389 | } | |
1390 | ||
1391 | static bool xhci_urb_temp_buffer_required(struct usb_hcd *hcd, | |
1392 | struct urb *urb) | |
1393 | { | |
1394 | bool ret = false; | |
1395 | unsigned int i; | |
1396 | unsigned int len = 0; | |
1397 | unsigned int trb_size; | |
1398 | unsigned int max_pkt; | |
1399 | struct scatterlist *sg; | |
1400 | struct scatterlist *tail_sg; | |
1401 | ||
1402 | tail_sg = urb->sg; | |
1403 | max_pkt = usb_endpoint_maxp(&urb->ep->desc); | |
1404 | ||
1405 | if (!urb->num_sgs) | |
1406 | return ret; | |
1407 | ||
1408 | if (urb->dev->speed >= USB_SPEED_SUPER) | |
1409 | trb_size = TRB_CACHE_SIZE_SS; | |
1410 | else | |
1411 | trb_size = TRB_CACHE_SIZE_HS; | |
1412 | ||
1413 | if (urb->transfer_buffer_length != 0 && | |
1414 | !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { | |
1415 | for_each_sg(urb->sg, sg, urb->num_sgs, i) { | |
1416 | len = len + sg->length; | |
1417 | if (i > trb_size - 2) { | |
1418 | len = len - tail_sg->length; | |
1419 | if (len < max_pkt) { | |
1420 | ret = true; | |
1421 | break; | |
1422 | } | |
1423 | ||
1424 | tail_sg = sg_next(tail_sg); | |
1425 | } | |
1426 | } | |
1427 | } | |
1428 | return ret; | |
1429 | } | |
1430 | ||
1431 | static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb) | |
1432 | { | |
1433 | unsigned int len; | |
1434 | unsigned int buf_len; | |
1435 | enum dma_data_direction dir; | |
1436 | ||
1437 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
1438 | ||
1439 | buf_len = urb->transfer_buffer_length; | |
1440 | ||
1441 | if (IS_ENABLED(CONFIG_HAS_DMA) && | |
1442 | (urb->transfer_flags & URB_DMA_MAP_SINGLE)) | |
1443 | dma_unmap_single(hcd->self.sysdev, | |
1444 | urb->transfer_dma, | |
1445 | urb->transfer_buffer_length, | |
1446 | dir); | |
1447 | ||
271a21d8 | 1448 | if (usb_urb_dir_in(urb)) { |
2017a1e5 TJ |
1449 | len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs, |
1450 | urb->transfer_buffer, | |
1451 | buf_len, | |
1452 | 0); | |
271a21d8 MN |
1453 | if (len != buf_len) { |
1454 | xhci_dbg(hcd_to_xhci(hcd), | |
1455 | "Copy from tmp buf to urb sg list failed\n"); | |
1456 | urb->actual_length = len; | |
1457 | } | |
1458 | } | |
2017a1e5 TJ |
1459 | urb->transfer_flags &= ~URB_DMA_MAP_SINGLE; |
1460 | kfree(urb->transfer_buffer); | |
1461 | urb->transfer_buffer = NULL; | |
1462 | } | |
1463 | ||
33e39350 NSJ |
1464 | /* |
1465 | * Bypass the DMA mapping if URB is suitable for Immediate Transfer (IDT), | |
1466 | * we'll copy the actual data into the TRB address register. This is limited to | |
1467 | * transfers up to 8 bytes on output endpoints of any kind with wMaxPacketSize | |
1468 | * >= 8 bytes. If suitable for IDT only one Transfer TRB per TD is allowed. | |
1469 | */ | |
1470 | static int xhci_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, | |
1471 | gfp_t mem_flags) | |
1472 | { | |
2017a1e5 TJ |
1473 | struct xhci_hcd *xhci; |
1474 | ||
1475 | xhci = hcd_to_xhci(hcd); | |
1476 | ||
33e39350 NSJ |
1477 | if (xhci_urb_suitable_for_idt(urb)) |
1478 | return 0; | |
1479 | ||
2017a1e5 TJ |
1480 | if (xhci->quirks & XHCI_SG_TRB_CACHE_SIZE_QUIRK) { |
1481 | if (xhci_urb_temp_buffer_required(hcd, urb)) | |
1482 | return xhci_map_temp_buffer(hcd, urb); | |
1483 | } | |
33e39350 NSJ |
1484 | return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); |
1485 | } | |
1486 | ||
2017a1e5 TJ |
1487 | static void xhci_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
1488 | { | |
1489 | struct xhci_hcd *xhci; | |
1490 | bool unmap_temp_buf = false; | |
1491 | ||
1492 | xhci = hcd_to_xhci(hcd); | |
1493 | ||
1494 | if (urb->num_sgs && (urb->transfer_flags & URB_DMA_MAP_SINGLE)) | |
1495 | unmap_temp_buf = true; | |
1496 | ||
1497 | if ((xhci->quirks & XHCI_SG_TRB_CACHE_SIZE_QUIRK) && unmap_temp_buf) | |
1498 | xhci_unmap_temp_buf(hcd, urb); | |
1499 | else | |
1500 | usb_hcd_unmap_urb_for_dma(hcd, urb); | |
1501 | } | |
1502 | ||
1503 | /** | |
d0e96f5a SS |
1504 | * xhci_get_endpoint_index - Used for passing endpoint bitmasks between the core and |
1505 | * HCDs. Find the index for an endpoint given its descriptor. Use the return | |
1506 | * value to right shift 1 for the bitmask. | |
1507 | * | |
1508 | * Index = (epnum * 2) + direction - 1, | |
1509 | * where direction = 0 for OUT, 1 for IN. | |
1510 | * For control endpoints, the IN index is used (OUT index is unused), so | |
1511 | * index = (epnum * 2) + direction - 1 = (epnum * 2) + 1 - 1 = (epnum * 2) | |
1512 | */ | |
1513 | unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc) | |
1514 | { | |
1515 | unsigned int index; | |
1516 | if (usb_endpoint_xfer_control(desc)) | |
1517 | index = (unsigned int) (usb_endpoint_num(desc)*2); | |
1518 | else | |
1519 | index = (unsigned int) (usb_endpoint_num(desc)*2) + | |
1520 | (usb_endpoint_dir_in(desc) ? 1 : 0) - 1; | |
1521 | return index; | |
1522 | } | |
14295a15 | 1523 | EXPORT_SYMBOL_GPL(xhci_get_endpoint_index); |
d0e96f5a | 1524 | |
01c5f447 JW |
1525 | /* The reverse operation to xhci_get_endpoint_index. Calculate the USB endpoint |
1526 | * address from the XHCI endpoint index. | |
1527 | */ | |
d017aeaf | 1528 | static unsigned int xhci_get_endpoint_address(unsigned int ep_index) |
01c5f447 JW |
1529 | { |
1530 | unsigned int number = DIV_ROUND_UP(ep_index, 2); | |
1531 | unsigned int direction = ep_index % 2 ? USB_DIR_OUT : USB_DIR_IN; | |
1532 | return direction | number; | |
1533 | } | |
1534 | ||
f94e0186 SS |
1535 | /* Find the flag for this endpoint (for use in the control context). Use the |
1536 | * endpoint index to create a bitmask. The slot context is bit 0, endpoint 0 is | |
1537 | * bit 1, etc. | |
1538 | */ | |
3969384c | 1539 | static unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc) |
f94e0186 SS |
1540 | { |
1541 | return 1 << (xhci_get_endpoint_index(desc) + 1); | |
1542 | } | |
1543 | ||
1544 | /* Compute the last valid endpoint context index. Basically, this is the | |
1545 | * endpoint index plus one. For slot contexts with more than valid endpoint, | |
1546 | * we find the most significant bit set in the added contexts flags. | |
1547 | * e.g. ep 1 IN (with epnum 0x81) => added_ctxs = 0b1000 | |
1548 | * fls(0b1000) = 4, but the endpoint context index is 3, so subtract one. | |
1549 | */ | |
ac9d8fe7 | 1550 | unsigned int xhci_last_valid_endpoint(u32 added_ctxs) |
f94e0186 SS |
1551 | { |
1552 | return fls(added_ctxs) - 1; | |
1553 | } | |
1554 | ||
d0e96f5a SS |
1555 | /* Returns 1 if the arguments are OK; |
1556 | * returns 0 this is a root hub; returns -EINVAL for NULL pointers. | |
1557 | */ | |
8212a49d | 1558 | static int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev, |
64927730 AX |
1559 | struct usb_host_endpoint *ep, int check_ep, bool check_virt_dev, |
1560 | const char *func) { | |
1561 | struct xhci_hcd *xhci; | |
1562 | struct xhci_virt_device *virt_dev; | |
1563 | ||
d0e96f5a | 1564 | if (!hcd || (check_ep && !ep) || !udev) { |
5c1127d3 | 1565 | pr_debug("xHCI %s called with invalid args\n", func); |
d0e96f5a SS |
1566 | return -EINVAL; |
1567 | } | |
1568 | if (!udev->parent) { | |
5c1127d3 | 1569 | pr_debug("xHCI %s called for root hub\n", func); |
d0e96f5a SS |
1570 | return 0; |
1571 | } | |
64927730 | 1572 | |
7bd89b40 | 1573 | xhci = hcd_to_xhci(hcd); |
64927730 | 1574 | if (check_virt_dev) { |
73ddc247 | 1575 | if (!udev->slot_id || !xhci->devs[udev->slot_id]) { |
5c1127d3 XR |
1576 | xhci_dbg(xhci, "xHCI %s called with unaddressed device\n", |
1577 | func); | |
64927730 AX |
1578 | return -EINVAL; |
1579 | } | |
1580 | ||
1581 | virt_dev = xhci->devs[udev->slot_id]; | |
1582 | if (virt_dev->udev != udev) { | |
5c1127d3 | 1583 | xhci_dbg(xhci, "xHCI %s called with udev and " |
64927730 AX |
1584 | "virt_dev does not match\n", func); |
1585 | return -EINVAL; | |
1586 | } | |
d0e96f5a | 1587 | } |
64927730 | 1588 | |
203a8661 SS |
1589 | if (xhci->xhc_state & XHCI_STATE_HALTED) |
1590 | return -ENODEV; | |
1591 | ||
d0e96f5a SS |
1592 | return 1; |
1593 | } | |
1594 | ||
2d3f1fac | 1595 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, |
913a8a34 SS |
1596 | struct usb_device *udev, struct xhci_command *command, |
1597 | bool ctx_change, bool must_succeed); | |
2d3f1fac SS |
1598 | |
1599 | /* | |
1600 | * Full speed devices may have a max packet size greater than 8 bytes, but the | |
1601 | * USB core doesn't know that until it reads the first 8 bytes of the | |
1602 | * descriptor. If the usb_device's max packet size changes after that point, | |
1603 | * we need to issue an evaluate context command and wait on it. | |
1604 | */ | |
1605 | static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id, | |
dda32c00 | 1606 | unsigned int ep_index, struct urb *urb, gfp_t mem_flags) |
2d3f1fac | 1607 | { |
2d3f1fac SS |
1608 | struct xhci_container_ctx *out_ctx; |
1609 | struct xhci_input_control_ctx *ctrl_ctx; | |
1610 | struct xhci_ep_ctx *ep_ctx; | |
ddba5cd0 | 1611 | struct xhci_command *command; |
2d3f1fac SS |
1612 | int max_packet_size; |
1613 | int hw_max_packet_size; | |
1614 | int ret = 0; | |
1615 | ||
1616 | out_ctx = xhci->devs[slot_id]->out_ctx; | |
1617 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); | |
28ccd296 | 1618 | hw_max_packet_size = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2)); |
29cc8897 | 1619 | max_packet_size = usb_endpoint_maxp(&urb->dev->ep0.desc); |
2d3f1fac | 1620 | if (hw_max_packet_size != max_packet_size) { |
3a7fa5be XR |
1621 | xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, |
1622 | "Max Packet Size for ep 0 changed."); | |
1623 | xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, | |
1624 | "Max packet size in usb_device = %d", | |
2d3f1fac | 1625 | max_packet_size); |
3a7fa5be XR |
1626 | xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, |
1627 | "Max packet size in xHCI HW = %d", | |
2d3f1fac | 1628 | hw_max_packet_size); |
3a7fa5be XR |
1629 | xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, |
1630 | "Issuing evaluate context command."); | |
2d3f1fac | 1631 | |
92f8e767 SS |
1632 | /* Set up the input context flags for the command */ |
1633 | /* FIXME: This won't work if a non-default control endpoint | |
1634 | * changes max packet sizes. | |
1635 | */ | |
ddba5cd0 | 1636 | |
dda32c00 | 1637 | command = xhci_alloc_command(xhci, true, mem_flags); |
ddba5cd0 MN |
1638 | if (!command) |
1639 | return -ENOMEM; | |
1640 | ||
1641 | command->in_ctx = xhci->devs[slot_id]->in_ctx; | |
4daf9df5 | 1642 | ctrl_ctx = xhci_get_input_control_ctx(command->in_ctx); |
92f8e767 SS |
1643 | if (!ctrl_ctx) { |
1644 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", | |
1645 | __func__); | |
ddba5cd0 MN |
1646 | ret = -ENOMEM; |
1647 | goto command_cleanup; | |
92f8e767 | 1648 | } |
2d3f1fac | 1649 | /* Set up the modified control endpoint 0 */ |
913a8a34 SS |
1650 | xhci_endpoint_copy(xhci, xhci->devs[slot_id]->in_ctx, |
1651 | xhci->devs[slot_id]->out_ctx, ep_index); | |
92f8e767 | 1652 | |
ddba5cd0 | 1653 | ep_ctx = xhci_get_ep_ctx(xhci, command->in_ctx, ep_index); |
a73d9d9c | 1654 | ep_ctx->ep_info &= cpu_to_le32(~EP_STATE_MASK);/* must clear */ |
28ccd296 ME |
1655 | ep_ctx->ep_info2 &= cpu_to_le32(~MAX_PACKET_MASK); |
1656 | ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet_size)); | |
2d3f1fac | 1657 | |
28ccd296 | 1658 | ctrl_ctx->add_flags = cpu_to_le32(EP0_FLAG); |
2d3f1fac SS |
1659 | ctrl_ctx->drop_flags = 0; |
1660 | ||
ddba5cd0 | 1661 | ret = xhci_configure_endpoint(xhci, urb->dev, command, |
913a8a34 | 1662 | true, false); |
2d3f1fac SS |
1663 | |
1664 | /* Clean up the input context for later use by bandwidth | |
1665 | * functions. | |
1666 | */ | |
28ccd296 | 1667 | ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG); |
ddba5cd0 MN |
1668 | command_cleanup: |
1669 | kfree(command->completion); | |
1670 | kfree(command); | |
2d3f1fac SS |
1671 | } |
1672 | return ret; | |
1673 | } | |
1674 | ||
d0e96f5a SS |
1675 | /* |
1676 | * non-error returns are a promise to giveback() the urb later | |
1677 | * we drop ownership so next owner (or urb unlink) can get it | |
1678 | */ | |
3969384c | 1679 | static int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) |
d0e96f5a SS |
1680 | { |
1681 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
1682 | unsigned long flags; | |
1683 | int ret = 0; | |
15febf5e MN |
1684 | unsigned int slot_id, ep_index; |
1685 | unsigned int *ep_state; | |
8e51adcc | 1686 | struct urb_priv *urb_priv; |
7e64b037 | 1687 | int num_tds; |
2d3f1fac | 1688 | |
243a1dd7 | 1689 | if (!urb) |
d0e96f5a | 1690 | return -EINVAL; |
243a1dd7 HX |
1691 | ret = xhci_check_args(hcd, urb->dev, urb->ep, |
1692 | true, true, __func__); | |
1693 | if (ret <= 0) | |
1694 | return ret ? ret : -EINVAL; | |
d0e96f5a SS |
1695 | |
1696 | slot_id = urb->dev->slot_id; | |
1697 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); | |
15febf5e | 1698 | ep_state = &xhci->devs[slot_id]->eps[ep_index].ep_state; |
d0e96f5a | 1699 | |
96eea587 | 1700 | if (!HCD_HW_ACCESSIBLE(hcd)) |
6969408d | 1701 | return -ESHUTDOWN; |
96eea587 | 1702 | |
b8c3b718 MN |
1703 | if (xhci->devs[slot_id]->flags & VDEV_PORT_ERROR) { |
1704 | xhci_dbg(xhci, "Can't queue urb, port error, link inactive\n"); | |
1705 | return -ENODEV; | |
1706 | } | |
8e51adcc AX |
1707 | |
1708 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) | |
e6f7caa3 | 1709 | num_tds = urb->number_of_packets; |
4758dcd1 RA |
1710 | else if (usb_endpoint_is_bulk_out(&urb->ep->desc) && |
1711 | urb->transfer_buffer_length > 0 && | |
1712 | urb->transfer_flags & URB_ZERO_PACKET && | |
1713 | !(urb->transfer_buffer_length % usb_endpoint_maxp(&urb->ep->desc))) | |
e6f7caa3 | 1714 | num_tds = 2; |
8e51adcc | 1715 | else |
e6f7caa3 | 1716 | num_tds = 1; |
8e51adcc | 1717 | |
da79ff6e | 1718 | urb_priv = kzalloc(struct_size(urb_priv, td, num_tds), mem_flags); |
8e51adcc AX |
1719 | if (!urb_priv) |
1720 | return -ENOMEM; | |
1721 | ||
9ef7fbbb MN |
1722 | urb_priv->num_tds = num_tds; |
1723 | urb_priv->num_tds_done = 0; | |
8e51adcc AX |
1724 | urb->hcpriv = urb_priv; |
1725 | ||
5abdc2e6 FB |
1726 | trace_xhci_urb_enqueue(urb); |
1727 | ||
2d3f1fac SS |
1728 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
1729 | /* Check to see if the max packet size for the default control | |
1730 | * endpoint changed during FS device enumeration | |
1731 | */ | |
1732 | if (urb->dev->speed == USB_SPEED_FULL) { | |
1733 | ret = xhci_check_maxpacket(xhci, slot_id, | |
dda32c00 | 1734 | ep_index, urb, mem_flags); |
d13565c1 | 1735 | if (ret < 0) { |
4daf9df5 | 1736 | xhci_urb_free_priv(urb_priv); |
d13565c1 | 1737 | urb->hcpriv = NULL; |
2d3f1fac | 1738 | return ret; |
d13565c1 | 1739 | } |
2d3f1fac | 1740 | } |
6969408d | 1741 | } |
2d3f1fac | 1742 | |
6969408d MN |
1743 | spin_lock_irqsave(&xhci->lock, flags); |
1744 | ||
1745 | if (xhci->xhc_state & XHCI_STATE_DYING) { | |
1746 | xhci_dbg(xhci, "Ep 0x%x: URB %p submitted for non-responsive xHCI host.\n", | |
1747 | urb->ep->desc.bEndpointAddress, urb); | |
1748 | ret = -ESHUTDOWN; | |
1749 | goto free_priv; | |
1750 | } | |
15febf5e MN |
1751 | if (*ep_state & (EP_GETTING_STREAMS | EP_GETTING_NO_STREAMS)) { |
1752 | xhci_warn(xhci, "WARN: Can't enqueue URB, ep in streams transition state %x\n", | |
1753 | *ep_state); | |
1754 | ret = -EINVAL; | |
1755 | goto free_priv; | |
1756 | } | |
f5249461 MN |
1757 | if (*ep_state & EP_SOFT_CLEAR_TOGGLE) { |
1758 | xhci_warn(xhci, "Can't enqueue URB while manually clearing toggle\n"); | |
1759 | ret = -EINVAL; | |
1760 | goto free_priv; | |
1761 | } | |
6969408d MN |
1762 | |
1763 | switch (usb_endpoint_type(&urb->ep->desc)) { | |
1764 | ||
1765 | case USB_ENDPOINT_XFER_CONTROL: | |
b11069f5 | 1766 | ret = xhci_queue_ctrl_tx(xhci, GFP_ATOMIC, urb, |
6969408d MN |
1767 | slot_id, ep_index); |
1768 | break; | |
1769 | case USB_ENDPOINT_XFER_BULK: | |
6969408d MN |
1770 | ret = xhci_queue_bulk_tx(xhci, GFP_ATOMIC, urb, |
1771 | slot_id, ep_index); | |
1772 | break; | |
6969408d | 1773 | case USB_ENDPOINT_XFER_INT: |
624defa1 SS |
1774 | ret = xhci_queue_intr_tx(xhci, GFP_ATOMIC, urb, |
1775 | slot_id, ep_index); | |
6969408d | 1776 | break; |
6969408d | 1777 | case USB_ENDPOINT_XFER_ISOC: |
787f4e5a AX |
1778 | ret = xhci_queue_isoc_tx_prepare(xhci, GFP_ATOMIC, urb, |
1779 | slot_id, ep_index); | |
2d3f1fac | 1780 | } |
6969408d MN |
1781 | |
1782 | if (ret) { | |
d13565c1 | 1783 | free_priv: |
6969408d MN |
1784 | xhci_urb_free_priv(urb_priv); |
1785 | urb->hcpriv = NULL; | |
1786 | } | |
6f5165cf | 1787 | spin_unlock_irqrestore(&xhci->lock, flags); |
d13565c1 | 1788 | return ret; |
d0e96f5a SS |
1789 | } |
1790 | ||
ae636747 SS |
1791 | /* |
1792 | * Remove the URB's TD from the endpoint ring. This may cause the HC to stop | |
1793 | * USB transfers, potentially stopping in the middle of a TRB buffer. The HC | |
1794 | * should pick up where it left off in the TD, unless a Set Transfer Ring | |
1795 | * Dequeue Pointer is issued. | |
1796 | * | |
1797 | * The TRBs that make up the buffers for the canceled URB will be "removed" from | |
1798 | * the ring. Since the ring is a contiguous structure, they can't be physically | |
1799 | * removed. Instead, there are two options: | |
1800 | * | |
1801 | * 1) If the HC is in the middle of processing the URB to be canceled, we | |
1802 | * simply move the ring's dequeue pointer past those TRBs using the Set | |
1803 | * Transfer Ring Dequeue Pointer command. This will be the common case, | |
1804 | * when drivers timeout on the last submitted URB and attempt to cancel. | |
1805 | * | |
1806 | * 2) If the HC is in the middle of a different TD, we turn the TRBs into a | |
1807 | * series of 1-TRB transfer no-op TDs. (No-ops shouldn't be chained.) The | |
1808 | * HC will need to invalidate the any TRBs it has cached after the stop | |
1809 | * endpoint command, as noted in the xHCI 0.95 errata. | |
1810 | * | |
1811 | * 3) The TD may have completed by the time the Stop Endpoint Command | |
1812 | * completes, so software needs to handle that case too. | |
1813 | * | |
1814 | * This function should protect against the TD enqueueing code ringing the | |
1815 | * doorbell while this code is waiting for a Stop Endpoint command to complete. | |
1816 | * It also needs to account for multiple cancellations on happening at the same | |
1817 | * time for the same endpoint. | |
1818 | * | |
1819 | * Note that this function can be called in any context, or so says | |
1820 | * usb_hcd_unlink_urb() | |
d0e96f5a | 1821 | */ |
3969384c | 1822 | static int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
d0e96f5a | 1823 | { |
ae636747 | 1824 | unsigned long flags; |
8e51adcc | 1825 | int ret, i; |
e34b2fbf | 1826 | u32 temp; |
ae636747 | 1827 | struct xhci_hcd *xhci; |
8e51adcc | 1828 | struct urb_priv *urb_priv; |
ae636747 SS |
1829 | struct xhci_td *td; |
1830 | unsigned int ep_index; | |
1831 | struct xhci_ring *ep_ring; | |
63a0d9ab | 1832 | struct xhci_virt_ep *ep; |
ddba5cd0 | 1833 | struct xhci_command *command; |
d3519b9d | 1834 | struct xhci_virt_device *vdev; |
ae636747 SS |
1835 | |
1836 | xhci = hcd_to_xhci(hcd); | |
1837 | spin_lock_irqsave(&xhci->lock, flags); | |
5abdc2e6 FB |
1838 | |
1839 | trace_xhci_urb_dequeue(urb); | |
1840 | ||
ae636747 SS |
1841 | /* Make sure the URB hasn't completed or been unlinked already */ |
1842 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); | |
d3519b9d | 1843 | if (ret) |
ae636747 | 1844 | goto done; |
d3519b9d MN |
1845 | |
1846 | /* give back URB now if we can't queue it for cancel */ | |
1847 | vdev = xhci->devs[urb->dev->slot_id]; | |
1848 | urb_priv = urb->hcpriv; | |
1849 | if (!vdev || !urb_priv) | |
1850 | goto err_giveback; | |
1851 | ||
1852 | ep_index = xhci_get_endpoint_index(&urb->ep->desc); | |
1853 | ep = &vdev->eps[ep_index]; | |
1854 | ep_ring = xhci_urb_to_transfer_ring(xhci, urb); | |
1855 | if (!ep || !ep_ring) | |
1856 | goto err_giveback; | |
1857 | ||
d9f11ba9 | 1858 | /* If xHC is dead take it down and return ALL URBs in xhci_hc_died() */ |
b0ba9720 | 1859 | temp = readl(&xhci->op_regs->status); |
d9f11ba9 MN |
1860 | if (temp == ~(u32)0 || xhci->xhc_state & XHCI_STATE_DYING) { |
1861 | xhci_hc_died(xhci); | |
1862 | goto done; | |
1863 | } | |
1864 | ||
4937213b MN |
1865 | /* |
1866 | * check ring is not re-allocated since URB was enqueued. If it is, then | |
1867 | * make sure none of the ring related pointers in this URB private data | |
1868 | * are touched, such as td_list, otherwise we overwrite freed data | |
1869 | */ | |
1870 | if (!td_on_ring(&urb_priv->td[0], ep_ring)) { | |
1871 | xhci_err(xhci, "Canceled URB td not found on endpoint ring"); | |
1872 | for (i = urb_priv->num_tds_done; i < urb_priv->num_tds; i++) { | |
1873 | td = &urb_priv->td[i]; | |
1874 | if (!list_empty(&td->cancelled_td_list)) | |
1875 | list_del_init(&td->cancelled_td_list); | |
1876 | } | |
1877 | goto err_giveback; | |
1878 | } | |
1879 | ||
d9f11ba9 | 1880 | if (xhci->xhc_state & XHCI_STATE_HALTED) { |
aa50b290 | 1881 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
d9f11ba9 | 1882 | "HC halted, freeing TD manually."); |
9ef7fbbb | 1883 | for (i = urb_priv->num_tds_done; |
d3519b9d | 1884 | i < urb_priv->num_tds; |
5c821711 | 1885 | i++) { |
7e64b037 | 1886 | td = &urb_priv->td[i]; |
585df1d9 SS |
1887 | if (!list_empty(&td->td_list)) |
1888 | list_del_init(&td->td_list); | |
1889 | if (!list_empty(&td->cancelled_td_list)) | |
1890 | list_del_init(&td->cancelled_td_list); | |
1891 | } | |
d3519b9d | 1892 | goto err_giveback; |
e34b2fbf | 1893 | } |
ae636747 | 1894 | |
9ef7fbbb MN |
1895 | i = urb_priv->num_tds_done; |
1896 | if (i < urb_priv->num_tds) | |
aa50b290 XR |
1897 | xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb, |
1898 | "Cancel URB %p, dev %s, ep 0x%x, " | |
1899 | "starting at offset 0x%llx", | |
79688acf SS |
1900 | urb, urb->dev->devpath, |
1901 | urb->ep->desc.bEndpointAddress, | |
1902 | (unsigned long long) xhci_trb_virt_to_dma( | |
7e64b037 MN |
1903 | urb_priv->td[i].start_seg, |
1904 | urb_priv->td[i].first_trb)); | |
79688acf | 1905 | |
9ef7fbbb | 1906 | for (; i < urb_priv->num_tds; i++) { |
7e64b037 | 1907 | td = &urb_priv->td[i]; |
674f8438 MN |
1908 | /* TD can already be on cancelled list if ep halted on it */ |
1909 | if (list_empty(&td->cancelled_td_list)) { | |
1910 | td->cancel_status = TD_DIRTY; | |
1911 | list_add_tail(&td->cancelled_td_list, | |
1912 | &ep->cancelled_td_list); | |
1913 | } | |
8e51adcc AX |
1914 | } |
1915 | ||
ae636747 SS |
1916 | /* Queue a stop endpoint command, but only if this is |
1917 | * the first cancellation to be handled. | |
1918 | */ | |
9983a5fc | 1919 | if (!(ep->ep_state & EP_STOP_CMD_PENDING)) { |
103afda0 | 1920 | command = xhci_alloc_command(xhci, false, GFP_ATOMIC); |
a0ee619f HG |
1921 | if (!command) { |
1922 | ret = -ENOMEM; | |
1923 | goto done; | |
1924 | } | |
9983a5fc | 1925 | ep->ep_state |= EP_STOP_CMD_PENDING; |
ddba5cd0 MN |
1926 | xhci_queue_stop_endpoint(xhci, command, urb->dev->slot_id, |
1927 | ep_index, 0); | |
23e3be11 | 1928 | xhci_ring_cmd_db(xhci); |
ae636747 SS |
1929 | } |
1930 | done: | |
1931 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1932 | return ret; | |
d3519b9d MN |
1933 | |
1934 | err_giveback: | |
1935 | if (urb_priv) | |
1936 | xhci_urb_free_priv(urb_priv); | |
1937 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
1938 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1939 | usb_hcd_giveback_urb(hcd, urb, -ESHUTDOWN); | |
1940 | return ret; | |
d0e96f5a SS |
1941 | } |
1942 | ||
f94e0186 SS |
1943 | /* Drop an endpoint from a new bandwidth configuration for this device. |
1944 | * Only one call to this function is allowed per endpoint before | |
1945 | * check_bandwidth() or reset_bandwidth() must be called. | |
1946 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will | |
1947 | * add the endpoint to the schedule with possibly new parameters denoted by a | |
1948 | * different endpoint descriptor in usb_host_endpoint. | |
1949 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is | |
1950 | * not allowed. | |
f88ba78d SS |
1951 | * |
1952 | * The USB core will not allow URBs to be queued to an endpoint that is being | |
1953 | * disabled, so there's no need for mutual exclusion to protect | |
1954 | * the xhci->devs[slot_id] structure. | |
f94e0186 | 1955 | */ |
14295a15 CY |
1956 | int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, |
1957 | struct usb_host_endpoint *ep) | |
f94e0186 | 1958 | { |
f94e0186 | 1959 | struct xhci_hcd *xhci; |
d115b048 JY |
1960 | struct xhci_container_ctx *in_ctx, *out_ctx; |
1961 | struct xhci_input_control_ctx *ctrl_ctx; | |
f94e0186 SS |
1962 | unsigned int ep_index; |
1963 | struct xhci_ep_ctx *ep_ctx; | |
1964 | u32 drop_flag; | |
d6759133 | 1965 | u32 new_add_flags, new_drop_flags; |
f94e0186 SS |
1966 | int ret; |
1967 | ||
64927730 | 1968 | ret = xhci_check_args(hcd, udev, ep, 1, true, __func__); |
f94e0186 SS |
1969 | if (ret <= 0) |
1970 | return ret; | |
1971 | xhci = hcd_to_xhci(hcd); | |
fe6c6c13 SS |
1972 | if (xhci->xhc_state & XHCI_STATE_DYING) |
1973 | return -ENODEV; | |
f94e0186 | 1974 | |
fe6c6c13 | 1975 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
1976 | drop_flag = xhci_get_endpoint_flag(&ep->desc); |
1977 | if (drop_flag == SLOT_FLAG || drop_flag == EP0_FLAG) { | |
1978 | xhci_dbg(xhci, "xHCI %s - can't drop slot or ep 0 %#x\n", | |
1979 | __func__, drop_flag); | |
1980 | return 0; | |
1981 | } | |
1982 | ||
f94e0186 | 1983 | in_ctx = xhci->devs[udev->slot_id]->in_ctx; |
d115b048 | 1984 | out_ctx = xhci->devs[udev->slot_id]->out_ctx; |
4daf9df5 | 1985 | ctrl_ctx = xhci_get_input_control_ctx(in_ctx); |
92f8e767 SS |
1986 | if (!ctrl_ctx) { |
1987 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", | |
1988 | __func__); | |
1989 | return 0; | |
1990 | } | |
1991 | ||
f94e0186 | 1992 | ep_index = xhci_get_endpoint_index(&ep->desc); |
d115b048 | 1993 | ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index); |
f94e0186 SS |
1994 | /* If the HC already knows the endpoint is disabled, |
1995 | * or the HCD has noted it is disabled, ignore this request | |
1996 | */ | |
5071e6b2 | 1997 | if ((GET_EP_CTX_STATE(ep_ctx) == EP_STATE_DISABLED) || |
28ccd296 ME |
1998 | le32_to_cpu(ctrl_ctx->drop_flags) & |
1999 | xhci_get_endpoint_flag(&ep->desc)) { | |
a6134136 HG |
2000 | /* Do not warn when called after a usb_device_reset */ |
2001 | if (xhci->devs[udev->slot_id]->eps[ep_index].ring != NULL) | |
2002 | xhci_warn(xhci, "xHCI %s called with disabled ep %p\n", | |
2003 | __func__, ep); | |
f94e0186 SS |
2004 | return 0; |
2005 | } | |
2006 | ||
28ccd296 ME |
2007 | ctrl_ctx->drop_flags |= cpu_to_le32(drop_flag); |
2008 | new_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags); | |
f94e0186 | 2009 | |
28ccd296 ME |
2010 | ctrl_ctx->add_flags &= cpu_to_le32(~drop_flag); |
2011 | new_add_flags = le32_to_cpu(ctrl_ctx->add_flags); | |
f94e0186 | 2012 | |
02b6fdc2 LB |
2013 | xhci_debugfs_remove_endpoint(xhci, xhci->devs[udev->slot_id], ep_index); |
2014 | ||
f94e0186 SS |
2015 | xhci_endpoint_zero(xhci, xhci->devs[udev->slot_id], ep); |
2016 | ||
d6759133 | 2017 | xhci_dbg(xhci, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x\n", |
f94e0186 SS |
2018 | (unsigned int) ep->desc.bEndpointAddress, |
2019 | udev->slot_id, | |
2020 | (unsigned int) new_drop_flags, | |
d6759133 | 2021 | (unsigned int) new_add_flags); |
f94e0186 SS |
2022 | return 0; |
2023 | } | |
14295a15 | 2024 | EXPORT_SYMBOL_GPL(xhci_drop_endpoint); |
f94e0186 SS |
2025 | |
2026 | /* Add an endpoint to a new possible bandwidth configuration for this device. | |
2027 | * Only one call to this function is allowed per endpoint before | |
2028 | * check_bandwidth() or reset_bandwidth() must be called. | |
2029 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will | |
2030 | * add the endpoint to the schedule with possibly new parameters denoted by a | |
2031 | * different endpoint descriptor in usb_host_endpoint. | |
2032 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is | |
2033 | * not allowed. | |
f88ba78d SS |
2034 | * |
2035 | * The USB core will not allow URBs to be queued to an endpoint until the | |
2036 | * configuration or alt setting is installed in the device, so there's no need | |
2037 | * for mutual exclusion to protect the xhci->devs[slot_id] structure. | |
f94e0186 | 2038 | */ |
14295a15 CY |
2039 | int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, |
2040 | struct usb_host_endpoint *ep) | |
f94e0186 | 2041 | { |
f94e0186 | 2042 | struct xhci_hcd *xhci; |
92c9691b | 2043 | struct xhci_container_ctx *in_ctx; |
f94e0186 | 2044 | unsigned int ep_index; |
d115b048 | 2045 | struct xhci_input_control_ctx *ctrl_ctx; |
5afa0a5e | 2046 | struct xhci_ep_ctx *ep_ctx; |
f94e0186 | 2047 | u32 added_ctxs; |
d6759133 | 2048 | u32 new_add_flags, new_drop_flags; |
fa75ac37 | 2049 | struct xhci_virt_device *virt_dev; |
f94e0186 SS |
2050 | int ret = 0; |
2051 | ||
64927730 | 2052 | ret = xhci_check_args(hcd, udev, ep, 1, true, __func__); |
a1587d97 SS |
2053 | if (ret <= 0) { |
2054 | /* So we won't queue a reset ep command for a root hub */ | |
2055 | ep->hcpriv = NULL; | |
f94e0186 | 2056 | return ret; |
a1587d97 | 2057 | } |
f94e0186 | 2058 | xhci = hcd_to_xhci(hcd); |
fe6c6c13 SS |
2059 | if (xhci->xhc_state & XHCI_STATE_DYING) |
2060 | return -ENODEV; | |
f94e0186 SS |
2061 | |
2062 | added_ctxs = xhci_get_endpoint_flag(&ep->desc); | |
f94e0186 SS |
2063 | if (added_ctxs == SLOT_FLAG || added_ctxs == EP0_FLAG) { |
2064 | /* FIXME when we have to issue an evaluate endpoint command to | |
2065 | * deal with ep0 max packet size changing once we get the | |
2066 | * descriptors | |
2067 | */ | |
2068 | xhci_dbg(xhci, "xHCI %s - can't add slot or ep 0 %#x\n", | |
2069 | __func__, added_ctxs); | |
2070 | return 0; | |
2071 | } | |
2072 | ||
fa75ac37 SS |
2073 | virt_dev = xhci->devs[udev->slot_id]; |
2074 | in_ctx = virt_dev->in_ctx; | |
4daf9df5 | 2075 | ctrl_ctx = xhci_get_input_control_ctx(in_ctx); |
92f8e767 SS |
2076 | if (!ctrl_ctx) { |
2077 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", | |
2078 | __func__); | |
2079 | return 0; | |
2080 | } | |
fa75ac37 | 2081 | |
92f8e767 | 2082 | ep_index = xhci_get_endpoint_index(&ep->desc); |
fa75ac37 SS |
2083 | /* If this endpoint is already in use, and the upper layers are trying |
2084 | * to add it again without dropping it, reject the addition. | |
2085 | */ | |
2086 | if (virt_dev->eps[ep_index].ring && | |
92c9691b | 2087 | !(le32_to_cpu(ctrl_ctx->drop_flags) & added_ctxs)) { |
fa75ac37 SS |
2088 | xhci_warn(xhci, "Trying to add endpoint 0x%x " |
2089 | "without dropping it.\n", | |
2090 | (unsigned int) ep->desc.bEndpointAddress); | |
2091 | return -EINVAL; | |
2092 | } | |
2093 | ||
f94e0186 SS |
2094 | /* If the HCD has already noted the endpoint is enabled, |
2095 | * ignore this request. | |
2096 | */ | |
92c9691b | 2097 | if (le32_to_cpu(ctrl_ctx->add_flags) & added_ctxs) { |
700e2052 GKH |
2098 | xhci_warn(xhci, "xHCI %s called with enabled ep %p\n", |
2099 | __func__, ep); | |
f94e0186 SS |
2100 | return 0; |
2101 | } | |
2102 | ||
f88ba78d SS |
2103 | /* |
2104 | * Configuration and alternate setting changes must be done in | |
2105 | * process context, not interrupt context (or so documenation | |
2106 | * for usb_set_interface() and usb_set_configuration() claim). | |
2107 | */ | |
fa75ac37 | 2108 | if (xhci_endpoint_init(xhci, virt_dev, udev, ep, GFP_NOIO) < 0) { |
f94e0186 SS |
2109 | dev_dbg(&udev->dev, "%s - could not initialize ep %#x\n", |
2110 | __func__, ep->desc.bEndpointAddress); | |
f94e0186 SS |
2111 | return -ENOMEM; |
2112 | } | |
2113 | ||
28ccd296 ME |
2114 | ctrl_ctx->add_flags |= cpu_to_le32(added_ctxs); |
2115 | new_add_flags = le32_to_cpu(ctrl_ctx->add_flags); | |
f94e0186 SS |
2116 | |
2117 | /* If xhci_endpoint_disable() was called for this endpoint, but the | |
2118 | * xHC hasn't been notified yet through the check_bandwidth() call, | |
2119 | * this re-adds a new state for the endpoint from the new endpoint | |
2120 | * descriptors. We must drop and re-add this endpoint, so we leave the | |
2121 | * drop flags alone. | |
2122 | */ | |
28ccd296 | 2123 | new_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags); |
f94e0186 | 2124 | |
a1587d97 SS |
2125 | /* Store the usb_device pointer for later use */ |
2126 | ep->hcpriv = udev; | |
2127 | ||
5afa0a5e MN |
2128 | ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index); |
2129 | trace_xhci_add_endpoint(ep_ctx); | |
2130 | ||
d6759133 | 2131 | xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x\n", |
f94e0186 SS |
2132 | (unsigned int) ep->desc.bEndpointAddress, |
2133 | udev->slot_id, | |
2134 | (unsigned int) new_drop_flags, | |
d6759133 | 2135 | (unsigned int) new_add_flags); |
f94e0186 SS |
2136 | return 0; |
2137 | } | |
14295a15 | 2138 | EXPORT_SYMBOL_GPL(xhci_add_endpoint); |
f94e0186 | 2139 | |
d115b048 | 2140 | static void xhci_zero_in_ctx(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev) |
f94e0186 | 2141 | { |
d115b048 | 2142 | struct xhci_input_control_ctx *ctrl_ctx; |
f94e0186 | 2143 | struct xhci_ep_ctx *ep_ctx; |
d115b048 | 2144 | struct xhci_slot_ctx *slot_ctx; |
f94e0186 SS |
2145 | int i; |
2146 | ||
4daf9df5 | 2147 | ctrl_ctx = xhci_get_input_control_ctx(virt_dev->in_ctx); |
92f8e767 SS |
2148 | if (!ctrl_ctx) { |
2149 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", | |
2150 | __func__); | |
2151 | return; | |
2152 | } | |
2153 | ||
f94e0186 SS |
2154 | /* When a device's add flag and drop flag are zero, any subsequent |
2155 | * configure endpoint command will leave that endpoint's state | |
2156 | * untouched. Make sure we don't leave any old state in the input | |
2157 | * endpoint contexts. | |
2158 | */ | |
d115b048 JY |
2159 | ctrl_ctx->drop_flags = 0; |
2160 | ctrl_ctx->add_flags = 0; | |
2161 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); | |
28ccd296 | 2162 | slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); |
f94e0186 | 2163 | /* Endpoint 0 is always valid */ |
28ccd296 | 2164 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(1)); |
98871e94 | 2165 | for (i = 1; i < 31; i++) { |
d115b048 | 2166 | ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, i); |
f94e0186 SS |
2167 | ep_ctx->ep_info = 0; |
2168 | ep_ctx->ep_info2 = 0; | |
8e595a5d | 2169 | ep_ctx->deq = 0; |
f94e0186 SS |
2170 | ep_ctx->tx_info = 0; |
2171 | } | |
2172 | } | |
2173 | ||
f2217e8e | 2174 | static int xhci_configure_endpoint_result(struct xhci_hcd *xhci, |
00161f7d | 2175 | struct usb_device *udev, u32 *cmd_status) |
f2217e8e SS |
2176 | { |
2177 | int ret; | |
2178 | ||
913a8a34 | 2179 | switch (*cmd_status) { |
0b7c105a | 2180 | case COMP_COMMAND_ABORTED: |
604d02a2 | 2181 | case COMP_COMMAND_RING_STOPPED: |
c311e391 MN |
2182 | xhci_warn(xhci, "Timeout while waiting for configure endpoint command\n"); |
2183 | ret = -ETIME; | |
2184 | break; | |
0b7c105a | 2185 | case COMP_RESOURCE_ERROR: |
288c0f44 ON |
2186 | dev_warn(&udev->dev, |
2187 | "Not enough host controller resources for new device state.\n"); | |
f2217e8e SS |
2188 | ret = -ENOMEM; |
2189 | /* FIXME: can we allocate more resources for the HC? */ | |
2190 | break; | |
0b7c105a FB |
2191 | case COMP_BANDWIDTH_ERROR: |
2192 | case COMP_SECONDARY_BANDWIDTH_ERROR: | |
288c0f44 ON |
2193 | dev_warn(&udev->dev, |
2194 | "Not enough bandwidth for new device state.\n"); | |
f2217e8e SS |
2195 | ret = -ENOSPC; |
2196 | /* FIXME: can we go back to the old state? */ | |
2197 | break; | |
0b7c105a | 2198 | case COMP_TRB_ERROR: |
f2217e8e SS |
2199 | /* the HCD set up something wrong */ |
2200 | dev_warn(&udev->dev, "ERROR: Endpoint drop flag = 0, " | |
2201 | "add flag = 1, " | |
2202 | "and endpoint is not disabled.\n"); | |
2203 | ret = -EINVAL; | |
2204 | break; | |
0b7c105a | 2205 | case COMP_INCOMPATIBLE_DEVICE_ERROR: |
288c0f44 ON |
2206 | dev_warn(&udev->dev, |
2207 | "ERROR: Incompatible device for endpoint configure command.\n"); | |
f6ba6fe2 AH |
2208 | ret = -ENODEV; |
2209 | break; | |
f2217e8e | 2210 | case COMP_SUCCESS: |
3a7fa5be XR |
2211 | xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, |
2212 | "Successful Endpoint Configure command"); | |
f2217e8e SS |
2213 | ret = 0; |
2214 | break; | |
2215 | default: | |
288c0f44 ON |
2216 | xhci_err(xhci, "ERROR: unexpected command completion code 0x%x.\n", |
2217 | *cmd_status); | |
f2217e8e SS |
2218 | ret = -EINVAL; |
2219 | break; | |
2220 | } | |
2221 | return ret; | |
2222 | } | |
2223 | ||
2224 | static int xhci_evaluate_context_result(struct xhci_hcd *xhci, | |
00161f7d | 2225 | struct usb_device *udev, u32 *cmd_status) |
f2217e8e SS |
2226 | { |
2227 | int ret; | |
2228 | ||
913a8a34 | 2229 | switch (*cmd_status) { |
0b7c105a | 2230 | case COMP_COMMAND_ABORTED: |
604d02a2 | 2231 | case COMP_COMMAND_RING_STOPPED: |
c311e391 MN |
2232 | xhci_warn(xhci, "Timeout while waiting for evaluate context command\n"); |
2233 | ret = -ETIME; | |
2234 | break; | |
0b7c105a | 2235 | case COMP_PARAMETER_ERROR: |
288c0f44 ON |
2236 | dev_warn(&udev->dev, |
2237 | "WARN: xHCI driver setup invalid evaluate context command.\n"); | |
f2217e8e SS |
2238 | ret = -EINVAL; |
2239 | break; | |
0b7c105a | 2240 | case COMP_SLOT_NOT_ENABLED_ERROR: |
288c0f44 ON |
2241 | dev_warn(&udev->dev, |
2242 | "WARN: slot not enabled for evaluate context command.\n"); | |
b8031342 SS |
2243 | ret = -EINVAL; |
2244 | break; | |
0b7c105a | 2245 | case COMP_CONTEXT_STATE_ERROR: |
288c0f44 ON |
2246 | dev_warn(&udev->dev, |
2247 | "WARN: invalid context state for evaluate context command.\n"); | |
f2217e8e SS |
2248 | ret = -EINVAL; |
2249 | break; | |
0b7c105a | 2250 | case COMP_INCOMPATIBLE_DEVICE_ERROR: |
288c0f44 ON |
2251 | dev_warn(&udev->dev, |
2252 | "ERROR: Incompatible device for evaluate context command.\n"); | |
f6ba6fe2 AH |
2253 | ret = -ENODEV; |
2254 | break; | |
0b7c105a | 2255 | case COMP_MAX_EXIT_LATENCY_TOO_LARGE_ERROR: |
1bb73a88 AH |
2256 | /* Max Exit Latency too large error */ |
2257 | dev_warn(&udev->dev, "WARN: Max Exit Latency too large\n"); | |
2258 | ret = -EINVAL; | |
2259 | break; | |
f2217e8e | 2260 | case COMP_SUCCESS: |
3a7fa5be XR |
2261 | xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, |
2262 | "Successful evaluate context command"); | |
f2217e8e SS |
2263 | ret = 0; |
2264 | break; | |
2265 | default: | |
288c0f44 ON |
2266 | xhci_err(xhci, "ERROR: unexpected command completion code 0x%x.\n", |
2267 | *cmd_status); | |
f2217e8e SS |
2268 | ret = -EINVAL; |
2269 | break; | |
2270 | } | |
2271 | return ret; | |
2272 | } | |
2273 | ||
2cf95c18 | 2274 | static u32 xhci_count_num_new_endpoints(struct xhci_hcd *xhci, |
92f8e767 | 2275 | struct xhci_input_control_ctx *ctrl_ctx) |
2cf95c18 | 2276 | { |
2cf95c18 SS |
2277 | u32 valid_add_flags; |
2278 | u32 valid_drop_flags; | |
2279 | ||
2cf95c18 SS |
2280 | /* Ignore the slot flag (bit 0), and the default control endpoint flag |
2281 | * (bit 1). The default control endpoint is added during the Address | |
2282 | * Device command and is never removed until the slot is disabled. | |
2283 | */ | |
ef73400c XR |
2284 | valid_add_flags = le32_to_cpu(ctrl_ctx->add_flags) >> 2; |
2285 | valid_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags) >> 2; | |
2cf95c18 SS |
2286 | |
2287 | /* Use hweight32 to count the number of ones in the add flags, or | |
2288 | * number of endpoints added. Don't count endpoints that are changed | |
2289 | * (both added and dropped). | |
2290 | */ | |
2291 | return hweight32(valid_add_flags) - | |
2292 | hweight32(valid_add_flags & valid_drop_flags); | |
2293 | } | |
2294 | ||
2295 | static unsigned int xhci_count_num_dropped_endpoints(struct xhci_hcd *xhci, | |
92f8e767 | 2296 | struct xhci_input_control_ctx *ctrl_ctx) |
2cf95c18 | 2297 | { |
2cf95c18 SS |
2298 | u32 valid_add_flags; |
2299 | u32 valid_drop_flags; | |
2300 | ||
78d1ff02 XR |
2301 | valid_add_flags = le32_to_cpu(ctrl_ctx->add_flags) >> 2; |
2302 | valid_drop_flags = le32_to_cpu(ctrl_ctx->drop_flags) >> 2; | |
2cf95c18 SS |
2303 | |
2304 | return hweight32(valid_drop_flags) - | |
2305 | hweight32(valid_add_flags & valid_drop_flags); | |
2306 | } | |
2307 | ||
2308 | /* | |
2309 | * We need to reserve the new number of endpoints before the configure endpoint | |
2310 | * command completes. We can't subtract the dropped endpoints from the number | |
2311 | * of active endpoints until the command completes because we can oversubscribe | |
2312 | * the host in this case: | |
2313 | * | |
2314 | * - the first configure endpoint command drops more endpoints than it adds | |
2315 | * - a second configure endpoint command that adds more endpoints is queued | |
2316 | * - the first configure endpoint command fails, so the config is unchanged | |
2317 | * - the second command may succeed, even though there isn't enough resources | |
2318 | * | |
2319 | * Must be called with xhci->lock held. | |
2320 | */ | |
2321 | static int xhci_reserve_host_resources(struct xhci_hcd *xhci, | |
92f8e767 | 2322 | struct xhci_input_control_ctx *ctrl_ctx) |
2cf95c18 SS |
2323 | { |
2324 | u32 added_eps; | |
2325 | ||
92f8e767 | 2326 | added_eps = xhci_count_num_new_endpoints(xhci, ctrl_ctx); |
2cf95c18 | 2327 | if (xhci->num_active_eps + added_eps > xhci->limit_active_eps) { |
4bdfe4c3 XR |
2328 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
2329 | "Not enough ep ctxs: " | |
2330 | "%u active, need to add %u, limit is %u.", | |
2cf95c18 SS |
2331 | xhci->num_active_eps, added_eps, |
2332 | xhci->limit_active_eps); | |
2333 | return -ENOMEM; | |
2334 | } | |
2335 | xhci->num_active_eps += added_eps; | |
4bdfe4c3 XR |
2336 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
2337 | "Adding %u ep ctxs, %u now active.", added_eps, | |
2cf95c18 SS |
2338 | xhci->num_active_eps); |
2339 | return 0; | |
2340 | } | |
2341 | ||
2342 | /* | |
2343 | * The configure endpoint was failed by the xHC for some other reason, so we | |
2344 | * need to revert the resources that failed configuration would have used. | |
2345 | * | |
2346 | * Must be called with xhci->lock held. | |
2347 | */ | |
2348 | static void xhci_free_host_resources(struct xhci_hcd *xhci, | |
92f8e767 | 2349 | struct xhci_input_control_ctx *ctrl_ctx) |
2cf95c18 SS |
2350 | { |
2351 | u32 num_failed_eps; | |
2352 | ||
92f8e767 | 2353 | num_failed_eps = xhci_count_num_new_endpoints(xhci, ctrl_ctx); |
2cf95c18 | 2354 | xhci->num_active_eps -= num_failed_eps; |
4bdfe4c3 XR |
2355 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
2356 | "Removing %u failed ep ctxs, %u now active.", | |
2cf95c18 SS |
2357 | num_failed_eps, |
2358 | xhci->num_active_eps); | |
2359 | } | |
2360 | ||
2361 | /* | |
2362 | * Now that the command has completed, clean up the active endpoint count by | |
2363 | * subtracting out the endpoints that were dropped (but not changed). | |
2364 | * | |
2365 | * Must be called with xhci->lock held. | |
2366 | */ | |
2367 | static void xhci_finish_resource_reservation(struct xhci_hcd *xhci, | |
92f8e767 | 2368 | struct xhci_input_control_ctx *ctrl_ctx) |
2cf95c18 SS |
2369 | { |
2370 | u32 num_dropped_eps; | |
2371 | ||
92f8e767 | 2372 | num_dropped_eps = xhci_count_num_dropped_endpoints(xhci, ctrl_ctx); |
2cf95c18 SS |
2373 | xhci->num_active_eps -= num_dropped_eps; |
2374 | if (num_dropped_eps) | |
4bdfe4c3 XR |
2375 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
2376 | "Removing %u dropped ep ctxs, %u now active.", | |
2cf95c18 SS |
2377 | num_dropped_eps, |
2378 | xhci->num_active_eps); | |
2379 | } | |
2380 | ||
ed384bd3 | 2381 | static unsigned int xhci_get_block_size(struct usb_device *udev) |
c29eea62 SS |
2382 | { |
2383 | switch (udev->speed) { | |
2384 | case USB_SPEED_LOW: | |
2385 | case USB_SPEED_FULL: | |
2386 | return FS_BLOCK; | |
2387 | case USB_SPEED_HIGH: | |
2388 | return HS_BLOCK; | |
2389 | case USB_SPEED_SUPER: | |
0caf6b33 | 2390 | case USB_SPEED_SUPER_PLUS: |
c29eea62 SS |
2391 | return SS_BLOCK; |
2392 | case USB_SPEED_UNKNOWN: | |
2393 | case USB_SPEED_WIRELESS: | |
2394 | default: | |
2395 | /* Should never happen */ | |
2396 | return 1; | |
2397 | } | |
2398 | } | |
2399 | ||
ed384bd3 FB |
2400 | static unsigned int |
2401 | xhci_get_largest_overhead(struct xhci_interval_bw *interval_bw) | |
c29eea62 SS |
2402 | { |
2403 | if (interval_bw->overhead[LS_OVERHEAD_TYPE]) | |
2404 | return LS_OVERHEAD; | |
2405 | if (interval_bw->overhead[FS_OVERHEAD_TYPE]) | |
2406 | return FS_OVERHEAD; | |
2407 | return HS_OVERHEAD; | |
2408 | } | |
2409 | ||
2410 | /* If we are changing a LS/FS device under a HS hub, | |
2411 | * make sure (if we are activating a new TT) that the HS bus has enough | |
2412 | * bandwidth for this new TT. | |
2413 | */ | |
2414 | static int xhci_check_tt_bw_table(struct xhci_hcd *xhci, | |
2415 | struct xhci_virt_device *virt_dev, | |
2416 | int old_active_eps) | |
2417 | { | |
2418 | struct xhci_interval_bw_table *bw_table; | |
2419 | struct xhci_tt_bw_info *tt_info; | |
2420 | ||
2421 | /* Find the bandwidth table for the root port this TT is attached to. */ | |
2422 | bw_table = &xhci->rh_bw[virt_dev->real_port - 1].bw_table; | |
2423 | tt_info = virt_dev->tt_info; | |
2424 | /* If this TT already had active endpoints, the bandwidth for this TT | |
2425 | * has already been added. Removing all periodic endpoints (and thus | |
2426 | * making the TT enactive) will only decrease the bandwidth used. | |
2427 | */ | |
2428 | if (old_active_eps) | |
2429 | return 0; | |
2430 | if (old_active_eps == 0 && tt_info->active_eps != 0) { | |
2431 | if (bw_table->bw_used + TT_HS_OVERHEAD > HS_BW_LIMIT) | |
2432 | return -ENOMEM; | |
2433 | return 0; | |
2434 | } | |
2435 | /* Not sure why we would have no new active endpoints... | |
2436 | * | |
2437 | * Maybe because of an Evaluate Context change for a hub update or a | |
2438 | * control endpoint 0 max packet size change? | |
2439 | * FIXME: skip the bandwidth calculation in that case. | |
2440 | */ | |
2441 | return 0; | |
2442 | } | |
2443 | ||
2b698999 SS |
2444 | static int xhci_check_ss_bw(struct xhci_hcd *xhci, |
2445 | struct xhci_virt_device *virt_dev) | |
2446 | { | |
2447 | unsigned int bw_reserved; | |
2448 | ||
2449 | bw_reserved = DIV_ROUND_UP(SS_BW_RESERVED*SS_BW_LIMIT_IN, 100); | |
2450 | if (virt_dev->bw_table->ss_bw_in > (SS_BW_LIMIT_IN - bw_reserved)) | |
2451 | return -ENOMEM; | |
2452 | ||
2453 | bw_reserved = DIV_ROUND_UP(SS_BW_RESERVED*SS_BW_LIMIT_OUT, 100); | |
2454 | if (virt_dev->bw_table->ss_bw_out > (SS_BW_LIMIT_OUT - bw_reserved)) | |
2455 | return -ENOMEM; | |
2456 | ||
2457 | return 0; | |
2458 | } | |
2459 | ||
c29eea62 SS |
2460 | /* |
2461 | * This algorithm is a very conservative estimate of the worst-case scheduling | |
2462 | * scenario for any one interval. The hardware dynamically schedules the | |
2463 | * packets, so we can't tell which microframe could be the limiting factor in | |
2464 | * the bandwidth scheduling. This only takes into account periodic endpoints. | |
2465 | * | |
2466 | * Obviously, we can't solve an NP complete problem to find the minimum worst | |
2467 | * case scenario. Instead, we come up with an estimate that is no less than | |
2468 | * the worst case bandwidth used for any one microframe, but may be an | |
2469 | * over-estimate. | |
2470 | * | |
2471 | * We walk the requirements for each endpoint by interval, starting with the | |
2472 | * smallest interval, and place packets in the schedule where there is only one | |
2473 | * possible way to schedule packets for that interval. In order to simplify | |
2474 | * this algorithm, we record the largest max packet size for each interval, and | |
2475 | * assume all packets will be that size. | |
2476 | * | |
2477 | * For interval 0, we obviously must schedule all packets for each interval. | |
2478 | * The bandwidth for interval 0 is just the amount of data to be transmitted | |
2479 | * (the sum of all max ESIT payload sizes, plus any overhead per packet times | |
2480 | * the number of packets). | |
2481 | * | |
2482 | * For interval 1, we have two possible microframes to schedule those packets | |
2483 | * in. For this algorithm, if we can schedule the same number of packets for | |
2484 | * each possible scheduling opportunity (each microframe), we will do so. The | |
2485 | * remaining number of packets will be saved to be transmitted in the gaps in | |
2486 | * the next interval's scheduling sequence. | |
2487 | * | |
2488 | * As we move those remaining packets to be scheduled with interval 2 packets, | |
2489 | * we have to double the number of remaining packets to transmit. This is | |
2490 | * because the intervals are actually powers of 2, and we would be transmitting | |
2491 | * the previous interval's packets twice in this interval. We also have to be | |
2492 | * sure that when we look at the largest max packet size for this interval, we | |
2493 | * also look at the largest max packet size for the remaining packets and take | |
2494 | * the greater of the two. | |
2495 | * | |
2496 | * The algorithm continues to evenly distribute packets in each scheduling | |
2497 | * opportunity, and push the remaining packets out, until we get to the last | |
2498 | * interval. Then those packets and their associated overhead are just added | |
2499 | * to the bandwidth used. | |
2e27980e SS |
2500 | */ |
2501 | static int xhci_check_bw_table(struct xhci_hcd *xhci, | |
2502 | struct xhci_virt_device *virt_dev, | |
2503 | int old_active_eps) | |
2504 | { | |
c29eea62 SS |
2505 | unsigned int bw_reserved; |
2506 | unsigned int max_bandwidth; | |
2507 | unsigned int bw_used; | |
2508 | unsigned int block_size; | |
2509 | struct xhci_interval_bw_table *bw_table; | |
2510 | unsigned int packet_size = 0; | |
2511 | unsigned int overhead = 0; | |
2512 | unsigned int packets_transmitted = 0; | |
2513 | unsigned int packets_remaining = 0; | |
2514 | unsigned int i; | |
2515 | ||
0caf6b33 | 2516 | if (virt_dev->udev->speed >= USB_SPEED_SUPER) |
2b698999 SS |
2517 | return xhci_check_ss_bw(xhci, virt_dev); |
2518 | ||
c29eea62 SS |
2519 | if (virt_dev->udev->speed == USB_SPEED_HIGH) { |
2520 | max_bandwidth = HS_BW_LIMIT; | |
2521 | /* Convert percent of bus BW reserved to blocks reserved */ | |
2522 | bw_reserved = DIV_ROUND_UP(HS_BW_RESERVED * max_bandwidth, 100); | |
2523 | } else { | |
2524 | max_bandwidth = FS_BW_LIMIT; | |
2525 | bw_reserved = DIV_ROUND_UP(FS_BW_RESERVED * max_bandwidth, 100); | |
2526 | } | |
2527 | ||
2528 | bw_table = virt_dev->bw_table; | |
2529 | /* We need to translate the max packet size and max ESIT payloads into | |
2530 | * the units the hardware uses. | |
2531 | */ | |
2532 | block_size = xhci_get_block_size(virt_dev->udev); | |
2533 | ||
2534 | /* If we are manipulating a LS/FS device under a HS hub, double check | |
2535 | * that the HS bus has enough bandwidth if we are activing a new TT. | |
2536 | */ | |
2537 | if (virt_dev->tt_info) { | |
4bdfe4c3 XR |
2538 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
2539 | "Recalculating BW for rootport %u", | |
c29eea62 SS |
2540 | virt_dev->real_port); |
2541 | if (xhci_check_tt_bw_table(xhci, virt_dev, old_active_eps)) { | |
2542 | xhci_warn(xhci, "Not enough bandwidth on HS bus for " | |
2543 | "newly activated TT.\n"); | |
2544 | return -ENOMEM; | |
2545 | } | |
4bdfe4c3 XR |
2546 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
2547 | "Recalculating BW for TT slot %u port %u", | |
c29eea62 SS |
2548 | virt_dev->tt_info->slot_id, |
2549 | virt_dev->tt_info->ttport); | |
2550 | } else { | |
4bdfe4c3 XR |
2551 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
2552 | "Recalculating BW for rootport %u", | |
c29eea62 SS |
2553 | virt_dev->real_port); |
2554 | } | |
2555 | ||
2556 | /* Add in how much bandwidth will be used for interval zero, or the | |
2557 | * rounded max ESIT payload + number of packets * largest overhead. | |
2558 | */ | |
2559 | bw_used = DIV_ROUND_UP(bw_table->interval0_esit_payload, block_size) + | |
2560 | bw_table->interval_bw[0].num_packets * | |
2561 | xhci_get_largest_overhead(&bw_table->interval_bw[0]); | |
2562 | ||
2563 | for (i = 1; i < XHCI_MAX_INTERVAL; i++) { | |
2564 | unsigned int bw_added; | |
2565 | unsigned int largest_mps; | |
2566 | unsigned int interval_overhead; | |
2567 | ||
2568 | /* | |
2569 | * How many packets could we transmit in this interval? | |
2570 | * If packets didn't fit in the previous interval, we will need | |
2571 | * to transmit that many packets twice within this interval. | |
2572 | */ | |
2573 | packets_remaining = 2 * packets_remaining + | |
2574 | bw_table->interval_bw[i].num_packets; | |
2575 | ||
2576 | /* Find the largest max packet size of this or the previous | |
2577 | * interval. | |
2578 | */ | |
2579 | if (list_empty(&bw_table->interval_bw[i].endpoints)) | |
2580 | largest_mps = 0; | |
2581 | else { | |
2582 | struct xhci_virt_ep *virt_ep; | |
2583 | struct list_head *ep_entry; | |
2584 | ||
2585 | ep_entry = bw_table->interval_bw[i].endpoints.next; | |
2586 | virt_ep = list_entry(ep_entry, | |
2587 | struct xhci_virt_ep, bw_endpoint_list); | |
2588 | /* Convert to blocks, rounding up */ | |
2589 | largest_mps = DIV_ROUND_UP( | |
2590 | virt_ep->bw_info.max_packet_size, | |
2591 | block_size); | |
2592 | } | |
2593 | if (largest_mps > packet_size) | |
2594 | packet_size = largest_mps; | |
2595 | ||
2596 | /* Use the larger overhead of this or the previous interval. */ | |
2597 | interval_overhead = xhci_get_largest_overhead( | |
2598 | &bw_table->interval_bw[i]); | |
2599 | if (interval_overhead > overhead) | |
2600 | overhead = interval_overhead; | |
2601 | ||
2602 | /* How many packets can we evenly distribute across | |
2603 | * (1 << (i + 1)) possible scheduling opportunities? | |
2604 | */ | |
2605 | packets_transmitted = packets_remaining >> (i + 1); | |
2606 | ||
2607 | /* Add in the bandwidth used for those scheduled packets */ | |
2608 | bw_added = packets_transmitted * (overhead + packet_size); | |
2609 | ||
2610 | /* How many packets do we have remaining to transmit? */ | |
2611 | packets_remaining = packets_remaining % (1 << (i + 1)); | |
2612 | ||
2613 | /* What largest max packet size should those packets have? */ | |
2614 | /* If we've transmitted all packets, don't carry over the | |
2615 | * largest packet size. | |
2616 | */ | |
2617 | if (packets_remaining == 0) { | |
2618 | packet_size = 0; | |
2619 | overhead = 0; | |
2620 | } else if (packets_transmitted > 0) { | |
2621 | /* Otherwise if we do have remaining packets, and we've | |
2622 | * scheduled some packets in this interval, take the | |
2623 | * largest max packet size from endpoints with this | |
2624 | * interval. | |
2625 | */ | |
2626 | packet_size = largest_mps; | |
2627 | overhead = interval_overhead; | |
2628 | } | |
2629 | /* Otherwise carry over packet_size and overhead from the last | |
2630 | * time we had a remainder. | |
2631 | */ | |
2632 | bw_used += bw_added; | |
2633 | if (bw_used > max_bandwidth) { | |
2634 | xhci_warn(xhci, "Not enough bandwidth. " | |
2635 | "Proposed: %u, Max: %u\n", | |
2636 | bw_used, max_bandwidth); | |
2637 | return -ENOMEM; | |
2638 | } | |
2639 | } | |
2640 | /* | |
2641 | * Ok, we know we have some packets left over after even-handedly | |
2642 | * scheduling interval 15. We don't know which microframes they will | |
2643 | * fit into, so we over-schedule and say they will be scheduled every | |
2644 | * microframe. | |
2645 | */ | |
2646 | if (packets_remaining > 0) | |
2647 | bw_used += overhead + packet_size; | |
2648 | ||
2649 | if (!virt_dev->tt_info && virt_dev->udev->speed == USB_SPEED_HIGH) { | |
2650 | unsigned int port_index = virt_dev->real_port - 1; | |
2651 | ||
2652 | /* OK, we're manipulating a HS device attached to a | |
2653 | * root port bandwidth domain. Include the number of active TTs | |
2654 | * in the bandwidth used. | |
2655 | */ | |
2656 | bw_used += TT_HS_OVERHEAD * | |
2657 | xhci->rh_bw[port_index].num_active_tts; | |
2658 | } | |
2659 | ||
4bdfe4c3 XR |
2660 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
2661 | "Final bandwidth: %u, Limit: %u, Reserved: %u, " | |
2662 | "Available: %u " "percent", | |
c29eea62 SS |
2663 | bw_used, max_bandwidth, bw_reserved, |
2664 | (max_bandwidth - bw_used - bw_reserved) * 100 / | |
2665 | max_bandwidth); | |
2666 | ||
2667 | bw_used += bw_reserved; | |
2668 | if (bw_used > max_bandwidth) { | |
2669 | xhci_warn(xhci, "Not enough bandwidth. Proposed: %u, Max: %u\n", | |
2670 | bw_used, max_bandwidth); | |
2671 | return -ENOMEM; | |
2672 | } | |
2673 | ||
2674 | bw_table->bw_used = bw_used; | |
2e27980e SS |
2675 | return 0; |
2676 | } | |
2677 | ||
2678 | static bool xhci_is_async_ep(unsigned int ep_type) | |
2679 | { | |
2680 | return (ep_type != ISOC_OUT_EP && ep_type != INT_OUT_EP && | |
2681 | ep_type != ISOC_IN_EP && | |
2682 | ep_type != INT_IN_EP); | |
2683 | } | |
2684 | ||
2b698999 SS |
2685 | static bool xhci_is_sync_in_ep(unsigned int ep_type) |
2686 | { | |
392a07ae | 2687 | return (ep_type == ISOC_IN_EP || ep_type == INT_IN_EP); |
2b698999 SS |
2688 | } |
2689 | ||
2690 | static unsigned int xhci_get_ss_bw_consumed(struct xhci_bw_info *ep_bw) | |
2691 | { | |
2692 | unsigned int mps = DIV_ROUND_UP(ep_bw->max_packet_size, SS_BLOCK); | |
2693 | ||
2694 | if (ep_bw->ep_interval == 0) | |
2695 | return SS_OVERHEAD_BURST + | |
2696 | (ep_bw->mult * ep_bw->num_packets * | |
2697 | (SS_OVERHEAD + mps)); | |
2698 | return DIV_ROUND_UP(ep_bw->mult * ep_bw->num_packets * | |
2699 | (SS_OVERHEAD + mps + SS_OVERHEAD_BURST), | |
2700 | 1 << ep_bw->ep_interval); | |
2701 | ||
2702 | } | |
2703 | ||
3969384c | 2704 | static void xhci_drop_ep_from_interval_table(struct xhci_hcd *xhci, |
2e27980e SS |
2705 | struct xhci_bw_info *ep_bw, |
2706 | struct xhci_interval_bw_table *bw_table, | |
2707 | struct usb_device *udev, | |
2708 | struct xhci_virt_ep *virt_ep, | |
2709 | struct xhci_tt_bw_info *tt_info) | |
2710 | { | |
2711 | struct xhci_interval_bw *interval_bw; | |
2712 | int normalized_interval; | |
2713 | ||
2b698999 | 2714 | if (xhci_is_async_ep(ep_bw->type)) |
2e27980e SS |
2715 | return; |
2716 | ||
0caf6b33 | 2717 | if (udev->speed >= USB_SPEED_SUPER) { |
2b698999 SS |
2718 | if (xhci_is_sync_in_ep(ep_bw->type)) |
2719 | xhci->devs[udev->slot_id]->bw_table->ss_bw_in -= | |
2720 | xhci_get_ss_bw_consumed(ep_bw); | |
2721 | else | |
2722 | xhci->devs[udev->slot_id]->bw_table->ss_bw_out -= | |
2723 | xhci_get_ss_bw_consumed(ep_bw); | |
2724 | return; | |
2725 | } | |
2726 | ||
2727 | /* SuperSpeed endpoints never get added to intervals in the table, so | |
2728 | * this check is only valid for HS/FS/LS devices. | |
2729 | */ | |
2730 | if (list_empty(&virt_ep->bw_endpoint_list)) | |
2731 | return; | |
2e27980e SS |
2732 | /* For LS/FS devices, we need to translate the interval expressed in |
2733 | * microframes to frames. | |
2734 | */ | |
2735 | if (udev->speed == USB_SPEED_HIGH) | |
2736 | normalized_interval = ep_bw->ep_interval; | |
2737 | else | |
2738 | normalized_interval = ep_bw->ep_interval - 3; | |
2739 | ||
2740 | if (normalized_interval == 0) | |
2741 | bw_table->interval0_esit_payload -= ep_bw->max_esit_payload; | |
2742 | interval_bw = &bw_table->interval_bw[normalized_interval]; | |
2743 | interval_bw->num_packets -= ep_bw->num_packets; | |
2744 | switch (udev->speed) { | |
2745 | case USB_SPEED_LOW: | |
2746 | interval_bw->overhead[LS_OVERHEAD_TYPE] -= 1; | |
2747 | break; | |
2748 | case USB_SPEED_FULL: | |
2749 | interval_bw->overhead[FS_OVERHEAD_TYPE] -= 1; | |
2750 | break; | |
2751 | case USB_SPEED_HIGH: | |
2752 | interval_bw->overhead[HS_OVERHEAD_TYPE] -= 1; | |
2753 | break; | |
2754 | case USB_SPEED_SUPER: | |
0caf6b33 | 2755 | case USB_SPEED_SUPER_PLUS: |
2e27980e SS |
2756 | case USB_SPEED_UNKNOWN: |
2757 | case USB_SPEED_WIRELESS: | |
2758 | /* Should never happen because only LS/FS/HS endpoints will get | |
2759 | * added to the endpoint list. | |
2760 | */ | |
2761 | return; | |
2762 | } | |
2763 | if (tt_info) | |
2764 | tt_info->active_eps -= 1; | |
2765 | list_del_init(&virt_ep->bw_endpoint_list); | |
2766 | } | |
2767 | ||
2768 | static void xhci_add_ep_to_interval_table(struct xhci_hcd *xhci, | |
2769 | struct xhci_bw_info *ep_bw, | |
2770 | struct xhci_interval_bw_table *bw_table, | |
2771 | struct usb_device *udev, | |
2772 | struct xhci_virt_ep *virt_ep, | |
2773 | struct xhci_tt_bw_info *tt_info) | |
2774 | { | |
2775 | struct xhci_interval_bw *interval_bw; | |
2776 | struct xhci_virt_ep *smaller_ep; | |
2777 | int normalized_interval; | |
2778 | ||
2779 | if (xhci_is_async_ep(ep_bw->type)) | |
2780 | return; | |
2781 | ||
2b698999 SS |
2782 | if (udev->speed == USB_SPEED_SUPER) { |
2783 | if (xhci_is_sync_in_ep(ep_bw->type)) | |
2784 | xhci->devs[udev->slot_id]->bw_table->ss_bw_in += | |
2785 | xhci_get_ss_bw_consumed(ep_bw); | |
2786 | else | |
2787 | xhci->devs[udev->slot_id]->bw_table->ss_bw_out += | |
2788 | xhci_get_ss_bw_consumed(ep_bw); | |
2789 | return; | |
2790 | } | |
2791 | ||
2e27980e SS |
2792 | /* For LS/FS devices, we need to translate the interval expressed in |
2793 | * microframes to frames. | |
2794 | */ | |
2795 | if (udev->speed == USB_SPEED_HIGH) | |
2796 | normalized_interval = ep_bw->ep_interval; | |
2797 | else | |
2798 | normalized_interval = ep_bw->ep_interval - 3; | |
2799 | ||
2800 | if (normalized_interval == 0) | |
2801 | bw_table->interval0_esit_payload += ep_bw->max_esit_payload; | |
2802 | interval_bw = &bw_table->interval_bw[normalized_interval]; | |
2803 | interval_bw->num_packets += ep_bw->num_packets; | |
2804 | switch (udev->speed) { | |
2805 | case USB_SPEED_LOW: | |
2806 | interval_bw->overhead[LS_OVERHEAD_TYPE] += 1; | |
2807 | break; | |
2808 | case USB_SPEED_FULL: | |
2809 | interval_bw->overhead[FS_OVERHEAD_TYPE] += 1; | |
2810 | break; | |
2811 | case USB_SPEED_HIGH: | |
2812 | interval_bw->overhead[HS_OVERHEAD_TYPE] += 1; | |
2813 | break; | |
2814 | case USB_SPEED_SUPER: | |
0caf6b33 | 2815 | case USB_SPEED_SUPER_PLUS: |
2e27980e SS |
2816 | case USB_SPEED_UNKNOWN: |
2817 | case USB_SPEED_WIRELESS: | |
2818 | /* Should never happen because only LS/FS/HS endpoints will get | |
2819 | * added to the endpoint list. | |
2820 | */ | |
2821 | return; | |
2822 | } | |
2823 | ||
2824 | if (tt_info) | |
2825 | tt_info->active_eps += 1; | |
2826 | /* Insert the endpoint into the list, largest max packet size first. */ | |
2827 | list_for_each_entry(smaller_ep, &interval_bw->endpoints, | |
2828 | bw_endpoint_list) { | |
2829 | if (ep_bw->max_packet_size >= | |
2830 | smaller_ep->bw_info.max_packet_size) { | |
2831 | /* Add the new ep before the smaller endpoint */ | |
2832 | list_add_tail(&virt_ep->bw_endpoint_list, | |
2833 | &smaller_ep->bw_endpoint_list); | |
2834 | return; | |
2835 | } | |
2836 | } | |
2837 | /* Add the new endpoint at the end of the list. */ | |
2838 | list_add_tail(&virt_ep->bw_endpoint_list, | |
2839 | &interval_bw->endpoints); | |
2840 | } | |
2841 | ||
2842 | void xhci_update_tt_active_eps(struct xhci_hcd *xhci, | |
2843 | struct xhci_virt_device *virt_dev, | |
2844 | int old_active_eps) | |
2845 | { | |
2846 | struct xhci_root_port_bw_info *rh_bw_info; | |
2847 | if (!virt_dev->tt_info) | |
2848 | return; | |
2849 | ||
2850 | rh_bw_info = &xhci->rh_bw[virt_dev->real_port - 1]; | |
2851 | if (old_active_eps == 0 && | |
2852 | virt_dev->tt_info->active_eps != 0) { | |
2853 | rh_bw_info->num_active_tts += 1; | |
c29eea62 | 2854 | rh_bw_info->bw_table.bw_used += TT_HS_OVERHEAD; |
2e27980e SS |
2855 | } else if (old_active_eps != 0 && |
2856 | virt_dev->tt_info->active_eps == 0) { | |
2857 | rh_bw_info->num_active_tts -= 1; | |
c29eea62 | 2858 | rh_bw_info->bw_table.bw_used -= TT_HS_OVERHEAD; |
2e27980e SS |
2859 | } |
2860 | } | |
2861 | ||
2862 | static int xhci_reserve_bandwidth(struct xhci_hcd *xhci, | |
2863 | struct xhci_virt_device *virt_dev, | |
2864 | struct xhci_container_ctx *in_ctx) | |
2865 | { | |
2866 | struct xhci_bw_info ep_bw_info[31]; | |
2867 | int i; | |
2868 | struct xhci_input_control_ctx *ctrl_ctx; | |
2869 | int old_active_eps = 0; | |
2870 | ||
2e27980e SS |
2871 | if (virt_dev->tt_info) |
2872 | old_active_eps = virt_dev->tt_info->active_eps; | |
2873 | ||
4daf9df5 | 2874 | ctrl_ctx = xhci_get_input_control_ctx(in_ctx); |
92f8e767 SS |
2875 | if (!ctrl_ctx) { |
2876 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", | |
2877 | __func__); | |
2878 | return -ENOMEM; | |
2879 | } | |
2e27980e SS |
2880 | |
2881 | for (i = 0; i < 31; i++) { | |
2882 | if (!EP_IS_ADDED(ctrl_ctx, i) && !EP_IS_DROPPED(ctrl_ctx, i)) | |
2883 | continue; | |
2884 | ||
2885 | /* Make a copy of the BW info in case we need to revert this */ | |
2886 | memcpy(&ep_bw_info[i], &virt_dev->eps[i].bw_info, | |
2887 | sizeof(ep_bw_info[i])); | |
2888 | /* Drop the endpoint from the interval table if the endpoint is | |
2889 | * being dropped or changed. | |
2890 | */ | |
2891 | if (EP_IS_DROPPED(ctrl_ctx, i)) | |
2892 | xhci_drop_ep_from_interval_table(xhci, | |
2893 | &virt_dev->eps[i].bw_info, | |
2894 | virt_dev->bw_table, | |
2895 | virt_dev->udev, | |
2896 | &virt_dev->eps[i], | |
2897 | virt_dev->tt_info); | |
2898 | } | |
2899 | /* Overwrite the information stored in the endpoints' bw_info */ | |
2900 | xhci_update_bw_info(xhci, virt_dev->in_ctx, ctrl_ctx, virt_dev); | |
2901 | for (i = 0; i < 31; i++) { | |
2902 | /* Add any changed or added endpoints to the interval table */ | |
2903 | if (EP_IS_ADDED(ctrl_ctx, i)) | |
2904 | xhci_add_ep_to_interval_table(xhci, | |
2905 | &virt_dev->eps[i].bw_info, | |
2906 | virt_dev->bw_table, | |
2907 | virt_dev->udev, | |
2908 | &virt_dev->eps[i], | |
2909 | virt_dev->tt_info); | |
2910 | } | |
2911 | ||
2912 | if (!xhci_check_bw_table(xhci, virt_dev, old_active_eps)) { | |
2913 | /* Ok, this fits in the bandwidth we have. | |
2914 | * Update the number of active TTs. | |
2915 | */ | |
2916 | xhci_update_tt_active_eps(xhci, virt_dev, old_active_eps); | |
2917 | return 0; | |
2918 | } | |
2919 | ||
2920 | /* We don't have enough bandwidth for this, revert the stored info. */ | |
2921 | for (i = 0; i < 31; i++) { | |
2922 | if (!EP_IS_ADDED(ctrl_ctx, i) && !EP_IS_DROPPED(ctrl_ctx, i)) | |
2923 | continue; | |
2924 | ||
2925 | /* Drop the new copies of any added or changed endpoints from | |
2926 | * the interval table. | |
2927 | */ | |
2928 | if (EP_IS_ADDED(ctrl_ctx, i)) { | |
2929 | xhci_drop_ep_from_interval_table(xhci, | |
2930 | &virt_dev->eps[i].bw_info, | |
2931 | virt_dev->bw_table, | |
2932 | virt_dev->udev, | |
2933 | &virt_dev->eps[i], | |
2934 | virt_dev->tt_info); | |
2935 | } | |
2936 | /* Revert the endpoint back to its old information */ | |
2937 | memcpy(&virt_dev->eps[i].bw_info, &ep_bw_info[i], | |
2938 | sizeof(ep_bw_info[i])); | |
2939 | /* Add any changed or dropped endpoints back into the table */ | |
2940 | if (EP_IS_DROPPED(ctrl_ctx, i)) | |
2941 | xhci_add_ep_to_interval_table(xhci, | |
2942 | &virt_dev->eps[i].bw_info, | |
2943 | virt_dev->bw_table, | |
2944 | virt_dev->udev, | |
2945 | &virt_dev->eps[i], | |
2946 | virt_dev->tt_info); | |
2947 | } | |
2948 | return -ENOMEM; | |
2949 | } | |
2950 | ||
2951 | ||
f2217e8e SS |
2952 | /* Issue a configure endpoint command or evaluate context command |
2953 | * and wait for it to finish. | |
2954 | */ | |
2955 | static int xhci_configure_endpoint(struct xhci_hcd *xhci, | |
913a8a34 SS |
2956 | struct usb_device *udev, |
2957 | struct xhci_command *command, | |
2958 | bool ctx_change, bool must_succeed) | |
f2217e8e SS |
2959 | { |
2960 | int ret; | |
f2217e8e | 2961 | unsigned long flags; |
92f8e767 | 2962 | struct xhci_input_control_ctx *ctrl_ctx; |
913a8a34 | 2963 | struct xhci_virt_device *virt_dev; |
e3a78ff0 | 2964 | struct xhci_slot_ctx *slot_ctx; |
ddba5cd0 MN |
2965 | |
2966 | if (!command) | |
2967 | return -EINVAL; | |
f2217e8e SS |
2968 | |
2969 | spin_lock_irqsave(&xhci->lock, flags); | |
d9f11ba9 MN |
2970 | |
2971 | if (xhci->xhc_state & XHCI_STATE_DYING) { | |
2972 | spin_unlock_irqrestore(&xhci->lock, flags); | |
2973 | return -ESHUTDOWN; | |
2974 | } | |
2975 | ||
913a8a34 | 2976 | virt_dev = xhci->devs[udev->slot_id]; |
750645f8 | 2977 | |
4daf9df5 | 2978 | ctrl_ctx = xhci_get_input_control_ctx(command->in_ctx); |
92f8e767 | 2979 | if (!ctrl_ctx) { |
1f21569c | 2980 | spin_unlock_irqrestore(&xhci->lock, flags); |
92f8e767 SS |
2981 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", |
2982 | __func__); | |
2983 | return -ENOMEM; | |
2984 | } | |
2cf95c18 | 2985 | |
750645f8 | 2986 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK) && |
92f8e767 | 2987 | xhci_reserve_host_resources(xhci, ctrl_ctx)) { |
750645f8 SS |
2988 | spin_unlock_irqrestore(&xhci->lock, flags); |
2989 | xhci_warn(xhci, "Not enough host resources, " | |
2990 | "active endpoint contexts = %u\n", | |
2991 | xhci->num_active_eps); | |
2992 | return -ENOMEM; | |
2993 | } | |
2e27980e | 2994 | if ((xhci->quirks & XHCI_SW_BW_CHECKING) && |
ddba5cd0 | 2995 | xhci_reserve_bandwidth(xhci, virt_dev, command->in_ctx)) { |
2e27980e | 2996 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) |
92f8e767 | 2997 | xhci_free_host_resources(xhci, ctrl_ctx); |
2e27980e SS |
2998 | spin_unlock_irqrestore(&xhci->lock, flags); |
2999 | xhci_warn(xhci, "Not enough bandwidth\n"); | |
3000 | return -ENOMEM; | |
3001 | } | |
750645f8 | 3002 | |
e3a78ff0 | 3003 | slot_ctx = xhci_get_slot_ctx(xhci, command->in_ctx); |
90d6d573 MN |
3004 | |
3005 | trace_xhci_configure_endpoint_ctrl_ctx(ctrl_ctx); | |
e3a78ff0 MN |
3006 | trace_xhci_configure_endpoint(slot_ctx); |
3007 | ||
f2217e8e | 3008 | if (!ctx_change) |
ddba5cd0 MN |
3009 | ret = xhci_queue_configure_endpoint(xhci, command, |
3010 | command->in_ctx->dma, | |
913a8a34 | 3011 | udev->slot_id, must_succeed); |
f2217e8e | 3012 | else |
ddba5cd0 MN |
3013 | ret = xhci_queue_evaluate_context(xhci, command, |
3014 | command->in_ctx->dma, | |
4b266541 | 3015 | udev->slot_id, must_succeed); |
f2217e8e | 3016 | if (ret < 0) { |
2cf95c18 | 3017 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) |
92f8e767 | 3018 | xhci_free_host_resources(xhci, ctrl_ctx); |
f2217e8e | 3019 | spin_unlock_irqrestore(&xhci->lock, flags); |
3a7fa5be XR |
3020 | xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, |
3021 | "FIXME allocate a new ring segment"); | |
f2217e8e SS |
3022 | return -ENOMEM; |
3023 | } | |
3024 | xhci_ring_cmd_db(xhci); | |
3025 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3026 | ||
3027 | /* Wait for the configure endpoint command to complete */ | |
c311e391 | 3028 | wait_for_completion(command->completion); |
f2217e8e SS |
3029 | |
3030 | if (!ctx_change) | |
ddba5cd0 MN |
3031 | ret = xhci_configure_endpoint_result(xhci, udev, |
3032 | &command->status); | |
2cf95c18 | 3033 | else |
ddba5cd0 MN |
3034 | ret = xhci_evaluate_context_result(xhci, udev, |
3035 | &command->status); | |
2cf95c18 SS |
3036 | |
3037 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { | |
3038 | spin_lock_irqsave(&xhci->lock, flags); | |
3039 | /* If the command failed, remove the reserved resources. | |
3040 | * Otherwise, clean up the estimate to include dropped eps. | |
3041 | */ | |
3042 | if (ret) | |
92f8e767 | 3043 | xhci_free_host_resources(xhci, ctrl_ctx); |
2cf95c18 | 3044 | else |
92f8e767 | 3045 | xhci_finish_resource_reservation(xhci, ctrl_ctx); |
2cf95c18 SS |
3046 | spin_unlock_irqrestore(&xhci->lock, flags); |
3047 | } | |
3048 | return ret; | |
f2217e8e SS |
3049 | } |
3050 | ||
df613834 HG |
3051 | static void xhci_check_bw_drop_ep_streams(struct xhci_hcd *xhci, |
3052 | struct xhci_virt_device *vdev, int i) | |
3053 | { | |
3054 | struct xhci_virt_ep *ep = &vdev->eps[i]; | |
3055 | ||
3056 | if (ep->ep_state & EP_HAS_STREAMS) { | |
3057 | xhci_warn(xhci, "WARN: endpoint 0x%02x has streams on set_interface, freeing streams.\n", | |
3058 | xhci_get_endpoint_address(i)); | |
3059 | xhci_free_stream_info(xhci, ep->stream_info); | |
3060 | ep->stream_info = NULL; | |
3061 | ep->ep_state &= ~EP_HAS_STREAMS; | |
3062 | } | |
3063 | } | |
3064 | ||
f88ba78d SS |
3065 | /* Called after one or more calls to xhci_add_endpoint() or |
3066 | * xhci_drop_endpoint(). If this call fails, the USB core is expected | |
3067 | * to call xhci_reset_bandwidth(). | |
3068 | * | |
3069 | * Since we are in the middle of changing either configuration or | |
3070 | * installing a new alt setting, the USB core won't allow URBs to be | |
3071 | * enqueued for any endpoint on the old config or interface. Nothing | |
3072 | * else should be touching the xhci->devs[slot_id] structure, so we | |
3073 | * don't need to take the xhci->lock for manipulating that. | |
3074 | */ | |
1d69f9d9 | 3075 | int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) |
f94e0186 SS |
3076 | { |
3077 | int i; | |
3078 | int ret = 0; | |
f94e0186 SS |
3079 | struct xhci_hcd *xhci; |
3080 | struct xhci_virt_device *virt_dev; | |
d115b048 JY |
3081 | struct xhci_input_control_ctx *ctrl_ctx; |
3082 | struct xhci_slot_ctx *slot_ctx; | |
ddba5cd0 | 3083 | struct xhci_command *command; |
f94e0186 | 3084 | |
64927730 | 3085 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
f94e0186 SS |
3086 | if (ret <= 0) |
3087 | return ret; | |
3088 | xhci = hcd_to_xhci(hcd); | |
98d74f9c MN |
3089 | if ((xhci->xhc_state & XHCI_STATE_DYING) || |
3090 | (xhci->xhc_state & XHCI_STATE_REMOVING)) | |
fe6c6c13 | 3091 | return -ENODEV; |
f94e0186 | 3092 | |
700e2052 | 3093 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
3094 | virt_dev = xhci->devs[udev->slot_id]; |
3095 | ||
103afda0 | 3096 | command = xhci_alloc_command(xhci, true, GFP_KERNEL); |
ddba5cd0 MN |
3097 | if (!command) |
3098 | return -ENOMEM; | |
3099 | ||
3100 | command->in_ctx = virt_dev->in_ctx; | |
3101 | ||
f94e0186 | 3102 | /* See section 4.6.6 - A0 = 1; A1 = D0 = D1 = 0 */ |
4daf9df5 | 3103 | ctrl_ctx = xhci_get_input_control_ctx(command->in_ctx); |
92f8e767 SS |
3104 | if (!ctrl_ctx) { |
3105 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", | |
3106 | __func__); | |
ddba5cd0 MN |
3107 | ret = -ENOMEM; |
3108 | goto command_cleanup; | |
92f8e767 | 3109 | } |
28ccd296 ME |
3110 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
3111 | ctrl_ctx->add_flags &= cpu_to_le32(~EP0_FLAG); | |
3112 | ctrl_ctx->drop_flags &= cpu_to_le32(~(SLOT_FLAG | EP0_FLAG)); | |
2dc37539 SS |
3113 | |
3114 | /* Don't issue the command if there's no endpoints to update. */ | |
3115 | if (ctrl_ctx->add_flags == cpu_to_le32(SLOT_FLAG) && | |
ddba5cd0 MN |
3116 | ctrl_ctx->drop_flags == 0) { |
3117 | ret = 0; | |
3118 | goto command_cleanup; | |
3119 | } | |
d6759133 | 3120 | /* Fix up Context Entries field. Minimum value is EP0 == BIT(1). */ |
d115b048 | 3121 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
d6759133 JW |
3122 | for (i = 31; i >= 1; i--) { |
3123 | __le32 le32 = cpu_to_le32(BIT(i)); | |
3124 | ||
3125 | if ((virt_dev->eps[i-1].ring && !(ctrl_ctx->drop_flags & le32)) | |
3126 | || (ctrl_ctx->add_flags & le32) || i == 1) { | |
3127 | slot_ctx->dev_info &= cpu_to_le32(~LAST_CTX_MASK); | |
3128 | slot_ctx->dev_info |= cpu_to_le32(LAST_CTX(i)); | |
3129 | break; | |
3130 | } | |
3131 | } | |
f94e0186 | 3132 | |
ddba5cd0 | 3133 | ret = xhci_configure_endpoint(xhci, udev, command, |
913a8a34 | 3134 | false, false); |
ddba5cd0 | 3135 | if (ret) |
f94e0186 | 3136 | /* Callee should call reset_bandwidth() */ |
ddba5cd0 | 3137 | goto command_cleanup; |
f94e0186 | 3138 | |
834cb0fc | 3139 | /* Free any rings that were dropped, but not changed. */ |
98871e94 | 3140 | for (i = 1; i < 31; i++) { |
4819fef5 | 3141 | if ((le32_to_cpu(ctrl_ctx->drop_flags) & (1 << (i + 1))) && |
df613834 | 3142 | !(le32_to_cpu(ctrl_ctx->add_flags) & (1 << (i + 1)))) { |
c5628a2a | 3143 | xhci_free_endpoint_ring(xhci, virt_dev, i); |
df613834 HG |
3144 | xhci_check_bw_drop_ep_streams(xhci, virt_dev, i); |
3145 | } | |
834cb0fc | 3146 | } |
d115b048 | 3147 | xhci_zero_in_ctx(xhci, virt_dev); |
834cb0fc SS |
3148 | /* |
3149 | * Install any rings for completely new endpoints or changed endpoints, | |
c5628a2a | 3150 | * and free any old rings from changed endpoints. |
834cb0fc | 3151 | */ |
98871e94 | 3152 | for (i = 1; i < 31; i++) { |
74f9fe21 SS |
3153 | if (!virt_dev->eps[i].new_ring) |
3154 | continue; | |
c5628a2a | 3155 | /* Only free the old ring if it exists. |
74f9fe21 SS |
3156 | * It may not if this is the first add of an endpoint. |
3157 | */ | |
3158 | if (virt_dev->eps[i].ring) { | |
c5628a2a | 3159 | xhci_free_endpoint_ring(xhci, virt_dev, i); |
f94e0186 | 3160 | } |
df613834 | 3161 | xhci_check_bw_drop_ep_streams(xhci, virt_dev, i); |
74f9fe21 SS |
3162 | virt_dev->eps[i].ring = virt_dev->eps[i].new_ring; |
3163 | virt_dev->eps[i].new_ring = NULL; | |
167657a1 | 3164 | xhci_debugfs_create_endpoint(xhci, virt_dev, i); |
f94e0186 | 3165 | } |
ddba5cd0 MN |
3166 | command_cleanup: |
3167 | kfree(command->completion); | |
3168 | kfree(command); | |
f94e0186 | 3169 | |
f94e0186 SS |
3170 | return ret; |
3171 | } | |
14295a15 | 3172 | EXPORT_SYMBOL_GPL(xhci_check_bandwidth); |
f94e0186 | 3173 | |
1d69f9d9 | 3174 | void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) |
f94e0186 | 3175 | { |
f94e0186 SS |
3176 | struct xhci_hcd *xhci; |
3177 | struct xhci_virt_device *virt_dev; | |
3178 | int i, ret; | |
3179 | ||
64927730 | 3180 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
f94e0186 SS |
3181 | if (ret <= 0) |
3182 | return; | |
3183 | xhci = hcd_to_xhci(hcd); | |
3184 | ||
700e2052 | 3185 | xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev); |
f94e0186 SS |
3186 | virt_dev = xhci->devs[udev->slot_id]; |
3187 | /* Free any rings allocated for added endpoints */ | |
98871e94 | 3188 | for (i = 0; i < 31; i++) { |
63a0d9ab | 3189 | if (virt_dev->eps[i].new_ring) { |
02b6fdc2 | 3190 | xhci_debugfs_remove_endpoint(xhci, virt_dev, i); |
63a0d9ab SS |
3191 | xhci_ring_free(xhci, virt_dev->eps[i].new_ring); |
3192 | virt_dev->eps[i].new_ring = NULL; | |
f94e0186 SS |
3193 | } |
3194 | } | |
d115b048 | 3195 | xhci_zero_in_ctx(xhci, virt_dev); |
f94e0186 | 3196 | } |
14295a15 | 3197 | EXPORT_SYMBOL_GPL(xhci_reset_bandwidth); |
f94e0186 | 3198 | |
5270b951 | 3199 | static void xhci_setup_input_ctx_for_config_ep(struct xhci_hcd *xhci, |
913a8a34 SS |
3200 | struct xhci_container_ctx *in_ctx, |
3201 | struct xhci_container_ctx *out_ctx, | |
92f8e767 | 3202 | struct xhci_input_control_ctx *ctrl_ctx, |
913a8a34 | 3203 | u32 add_flags, u32 drop_flags) |
5270b951 | 3204 | { |
28ccd296 ME |
3205 | ctrl_ctx->add_flags = cpu_to_le32(add_flags); |
3206 | ctrl_ctx->drop_flags = cpu_to_le32(drop_flags); | |
913a8a34 | 3207 | xhci_slot_copy(xhci, in_ctx, out_ctx); |
28ccd296 | 3208 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
5270b951 SS |
3209 | } |
3210 | ||
18b74067 MN |
3211 | static void xhci_endpoint_disable(struct usb_hcd *hcd, |
3212 | struct usb_host_endpoint *host_ep) | |
3213 | { | |
3214 | struct xhci_hcd *xhci; | |
3215 | struct xhci_virt_device *vdev; | |
3216 | struct xhci_virt_ep *ep; | |
3217 | struct usb_device *udev; | |
3218 | unsigned long flags; | |
3219 | unsigned int ep_index; | |
3220 | ||
3221 | xhci = hcd_to_xhci(hcd); | |
3222 | rescan: | |
3223 | spin_lock_irqsave(&xhci->lock, flags); | |
3224 | ||
3225 | udev = (struct usb_device *)host_ep->hcpriv; | |
3226 | if (!udev || !udev->slot_id) | |
3227 | goto done; | |
3228 | ||
3229 | vdev = xhci->devs[udev->slot_id]; | |
3230 | if (!vdev) | |
3231 | goto done; | |
3232 | ||
3233 | ep_index = xhci_get_endpoint_index(&host_ep->desc); | |
3234 | ep = &vdev->eps[ep_index]; | |
18b74067 MN |
3235 | |
3236 | /* wait for hub_tt_work to finish clearing hub TT */ | |
3237 | if (ep->ep_state & EP_CLEARING_TT) { | |
3238 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3239 | schedule_timeout_uninterruptible(1); | |
3240 | goto rescan; | |
3241 | } | |
3242 | ||
3243 | if (ep->ep_state) | |
3244 | xhci_dbg(xhci, "endpoint disable with ep_state 0x%x\n", | |
3245 | ep->ep_state); | |
3246 | done: | |
3247 | host_ep->hcpriv = NULL; | |
3248 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3249 | } | |
3250 | ||
f5249461 MN |
3251 | /* |
3252 | * Called after usb core issues a clear halt control message. | |
3253 | * The host side of the halt should already be cleared by a reset endpoint | |
3254 | * command issued when the STALL event was received. | |
d0167ad2 | 3255 | * |
f5249461 MN |
3256 | * The reset endpoint command may only be issued to endpoints in the halted |
3257 | * state. For software that wishes to reset the data toggle or sequence number | |
3258 | * of an endpoint that isn't in the halted state this function will issue a | |
3259 | * configure endpoint command with the Drop and Add bits set for the target | |
3260 | * endpoint. Refer to the additional note in xhci spcification section 4.6.8. | |
a1587d97 | 3261 | */ |
8e71a322 | 3262 | |
3969384c | 3263 | static void xhci_endpoint_reset(struct usb_hcd *hcd, |
f5249461 | 3264 | struct usb_host_endpoint *host_ep) |
a1587d97 SS |
3265 | { |
3266 | struct xhci_hcd *xhci; | |
f5249461 MN |
3267 | struct usb_device *udev; |
3268 | struct xhci_virt_device *vdev; | |
3269 | struct xhci_virt_ep *ep; | |
3270 | struct xhci_input_control_ctx *ctrl_ctx; | |
3271 | struct xhci_command *stop_cmd, *cfg_cmd; | |
3272 | unsigned int ep_index; | |
3273 | unsigned long flags; | |
3274 | u32 ep_flag; | |
8de66b0e | 3275 | int err; |
a1587d97 SS |
3276 | |
3277 | xhci = hcd_to_xhci(hcd); | |
f5249461 MN |
3278 | if (!host_ep->hcpriv) |
3279 | return; | |
3280 | udev = (struct usb_device *) host_ep->hcpriv; | |
3281 | vdev = xhci->devs[udev->slot_id]; | |
cb53c517 MN |
3282 | |
3283 | /* | |
3284 | * vdev may be lost due to xHC restore error and re-initialization | |
3285 | * during S3/S4 resume. A new vdev will be allocated later by | |
3286 | * xhci_discover_or_reset_device() | |
3287 | */ | |
3288 | if (!udev->slot_id || !vdev) | |
3289 | return; | |
f5249461 MN |
3290 | ep_index = xhci_get_endpoint_index(&host_ep->desc); |
3291 | ep = &vdev->eps[ep_index]; | |
3292 | ||
3293 | /* Bail out if toggle is already being cleared by a endpoint reset */ | |
a01ba2a3 | 3294 | spin_lock_irqsave(&xhci->lock, flags); |
f5249461 MN |
3295 | if (ep->ep_state & EP_HARD_CLEAR_TOGGLE) { |
3296 | ep->ep_state &= ~EP_HARD_CLEAR_TOGGLE; | |
a01ba2a3 | 3297 | spin_unlock_irqrestore(&xhci->lock, flags); |
f5249461 MN |
3298 | return; |
3299 | } | |
a01ba2a3 | 3300 | spin_unlock_irqrestore(&xhci->lock, flags); |
f5249461 MN |
3301 | /* Only interrupt and bulk ep's use data toggle, USB2 spec 5.5.4-> */ |
3302 | if (usb_endpoint_xfer_control(&host_ep->desc) || | |
3303 | usb_endpoint_xfer_isoc(&host_ep->desc)) | |
3304 | return; | |
3305 | ||
3306 | ep_flag = xhci_get_endpoint_flag(&host_ep->desc); | |
3307 | ||
3308 | if (ep_flag == SLOT_FLAG || ep_flag == EP0_FLAG) | |
3309 | return; | |
3310 | ||
3311 | stop_cmd = xhci_alloc_command(xhci, true, GFP_NOWAIT); | |
3312 | if (!stop_cmd) | |
3313 | return; | |
3314 | ||
3315 | cfg_cmd = xhci_alloc_command_with_ctx(xhci, true, GFP_NOWAIT); | |
3316 | if (!cfg_cmd) | |
3317 | goto cleanup; | |
3318 | ||
3319 | spin_lock_irqsave(&xhci->lock, flags); | |
3320 | ||
3321 | /* block queuing new trbs and ringing ep doorbell */ | |
3322 | ep->ep_state |= EP_SOFT_CLEAR_TOGGLE; | |
ddba5cd0 | 3323 | |
c92bcfa7 | 3324 | /* |
f5249461 MN |
3325 | * Make sure endpoint ring is empty before resetting the toggle/seq. |
3326 | * Driver is required to synchronously cancel all transfer request. | |
3327 | * Stop the endpoint to force xHC to update the output context | |
c92bcfa7 | 3328 | */ |
a1587d97 | 3329 | |
f5249461 MN |
3330 | if (!list_empty(&ep->ring->td_list)) { |
3331 | dev_err(&udev->dev, "EP not empty, refuse reset\n"); | |
3332 | spin_unlock_irqrestore(&xhci->lock, flags); | |
d89b7664 | 3333 | xhci_free_command(xhci, cfg_cmd); |
f5249461 MN |
3334 | goto cleanup; |
3335 | } | |
8de66b0e BK |
3336 | |
3337 | err = xhci_queue_stop_endpoint(xhci, stop_cmd, udev->slot_id, | |
3338 | ep_index, 0); | |
3339 | if (err < 0) { | |
3340 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3341 | xhci_free_command(xhci, cfg_cmd); | |
3342 | xhci_dbg(xhci, "%s: Failed to queue stop ep command, %d ", | |
3343 | __func__, err); | |
3344 | goto cleanup; | |
3345 | } | |
3346 | ||
f5249461 MN |
3347 | xhci_ring_cmd_db(xhci); |
3348 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3349 | ||
3350 | wait_for_completion(stop_cmd->completion); | |
3351 | ||
3352 | spin_lock_irqsave(&xhci->lock, flags); | |
3353 | ||
3354 | /* config ep command clears toggle if add and drop ep flags are set */ | |
3355 | ctrl_ctx = xhci_get_input_control_ctx(cfg_cmd->in_ctx); | |
597899d2 MN |
3356 | if (!ctrl_ctx) { |
3357 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3358 | xhci_free_command(xhci, cfg_cmd); | |
3359 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", | |
3360 | __func__); | |
3361 | goto cleanup; | |
3362 | } | |
3363 | ||
f5249461 MN |
3364 | xhci_setup_input_ctx_for_config_ep(xhci, cfg_cmd->in_ctx, vdev->out_ctx, |
3365 | ctrl_ctx, ep_flag, ep_flag); | |
3366 | xhci_endpoint_copy(xhci, cfg_cmd->in_ctx, vdev->out_ctx, ep_index); | |
3367 | ||
8de66b0e | 3368 | err = xhci_queue_configure_endpoint(xhci, cfg_cmd, cfg_cmd->in_ctx->dma, |
f5249461 | 3369 | udev->slot_id, false); |
8de66b0e BK |
3370 | if (err < 0) { |
3371 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3372 | xhci_free_command(xhci, cfg_cmd); | |
3373 | xhci_dbg(xhci, "%s: Failed to queue config ep command, %d ", | |
3374 | __func__, err); | |
3375 | goto cleanup; | |
3376 | } | |
3377 | ||
f5249461 MN |
3378 | xhci_ring_cmd_db(xhci); |
3379 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3380 | ||
3381 | wait_for_completion(cfg_cmd->completion); | |
3382 | ||
f5249461 MN |
3383 | xhci_free_command(xhci, cfg_cmd); |
3384 | cleanup: | |
3385 | xhci_free_command(xhci, stop_cmd); | |
a01ba2a3 | 3386 | spin_lock_irqsave(&xhci->lock, flags); |
f1ec7ae6 DH |
3387 | if (ep->ep_state & EP_SOFT_CLEAR_TOGGLE) |
3388 | ep->ep_state &= ~EP_SOFT_CLEAR_TOGGLE; | |
a01ba2a3 | 3389 | spin_unlock_irqrestore(&xhci->lock, flags); |
a1587d97 SS |
3390 | } |
3391 | ||
8df75f42 SS |
3392 | static int xhci_check_streams_endpoint(struct xhci_hcd *xhci, |
3393 | struct usb_device *udev, struct usb_host_endpoint *ep, | |
3394 | unsigned int slot_id) | |
3395 | { | |
3396 | int ret; | |
3397 | unsigned int ep_index; | |
3398 | unsigned int ep_state; | |
3399 | ||
3400 | if (!ep) | |
3401 | return -EINVAL; | |
64927730 | 3402 | ret = xhci_check_args(xhci_to_hcd(xhci), udev, ep, 1, true, __func__); |
8df75f42 | 3403 | if (ret <= 0) |
243a1dd7 | 3404 | return ret ? ret : -EINVAL; |
a3901538 | 3405 | if (usb_ss_max_streams(&ep->ss_ep_comp) == 0) { |
8df75f42 SS |
3406 | xhci_warn(xhci, "WARN: SuperSpeed Endpoint Companion" |
3407 | " descriptor for ep 0x%x does not support streams\n", | |
3408 | ep->desc.bEndpointAddress); | |
3409 | return -EINVAL; | |
3410 | } | |
3411 | ||
3412 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
3413 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; | |
3414 | if (ep_state & EP_HAS_STREAMS || | |
3415 | ep_state & EP_GETTING_STREAMS) { | |
3416 | xhci_warn(xhci, "WARN: SuperSpeed bulk endpoint 0x%x " | |
3417 | "already has streams set up.\n", | |
3418 | ep->desc.bEndpointAddress); | |
3419 | xhci_warn(xhci, "Send email to xHCI maintainer and ask for " | |
3420 | "dynamic stream context array reallocation.\n"); | |
3421 | return -EINVAL; | |
3422 | } | |
3423 | if (!list_empty(&xhci->devs[slot_id]->eps[ep_index].ring->td_list)) { | |
3424 | xhci_warn(xhci, "Cannot setup streams for SuperSpeed bulk " | |
3425 | "endpoint 0x%x; URBs are pending.\n", | |
3426 | ep->desc.bEndpointAddress); | |
3427 | return -EINVAL; | |
3428 | } | |
3429 | return 0; | |
3430 | } | |
3431 | ||
3432 | static void xhci_calculate_streams_entries(struct xhci_hcd *xhci, | |
3433 | unsigned int *num_streams, unsigned int *num_stream_ctxs) | |
3434 | { | |
3435 | unsigned int max_streams; | |
3436 | ||
3437 | /* The stream context array size must be a power of two */ | |
3438 | *num_stream_ctxs = roundup_pow_of_two(*num_streams); | |
3439 | /* | |
3440 | * Find out how many primary stream array entries the host controller | |
3441 | * supports. Later we may use secondary stream arrays (similar to 2nd | |
3442 | * level page entries), but that's an optional feature for xHCI host | |
3443 | * controllers. xHCs must support at least 4 stream IDs. | |
3444 | */ | |
3445 | max_streams = HCC_MAX_PSA(xhci->hcc_params); | |
3446 | if (*num_stream_ctxs > max_streams) { | |
3447 | xhci_dbg(xhci, "xHCI HW only supports %u stream ctx entries.\n", | |
3448 | max_streams); | |
3449 | *num_stream_ctxs = max_streams; | |
3450 | *num_streams = max_streams; | |
3451 | } | |
3452 | } | |
3453 | ||
3454 | /* Returns an error code if one of the endpoint already has streams. | |
3455 | * This does not change any data structures, it only checks and gathers | |
3456 | * information. | |
3457 | */ | |
3458 | static int xhci_calculate_streams_and_bitmask(struct xhci_hcd *xhci, | |
3459 | struct usb_device *udev, | |
3460 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
3461 | unsigned int *num_streams, u32 *changed_ep_bitmask) | |
3462 | { | |
8df75f42 SS |
3463 | unsigned int max_streams; |
3464 | unsigned int endpoint_flag; | |
3465 | int i; | |
3466 | int ret; | |
3467 | ||
3468 | for (i = 0; i < num_eps; i++) { | |
3469 | ret = xhci_check_streams_endpoint(xhci, udev, | |
3470 | eps[i], udev->slot_id); | |
3471 | if (ret < 0) | |
3472 | return ret; | |
3473 | ||
18b7ede5 | 3474 | max_streams = usb_ss_max_streams(&eps[i]->ss_ep_comp); |
8df75f42 SS |
3475 | if (max_streams < (*num_streams - 1)) { |
3476 | xhci_dbg(xhci, "Ep 0x%x only supports %u stream IDs.\n", | |
3477 | eps[i]->desc.bEndpointAddress, | |
3478 | max_streams); | |
3479 | *num_streams = max_streams+1; | |
3480 | } | |
3481 | ||
3482 | endpoint_flag = xhci_get_endpoint_flag(&eps[i]->desc); | |
3483 | if (*changed_ep_bitmask & endpoint_flag) | |
3484 | return -EINVAL; | |
3485 | *changed_ep_bitmask |= endpoint_flag; | |
3486 | } | |
3487 | return 0; | |
3488 | } | |
3489 | ||
3490 | static u32 xhci_calculate_no_streams_bitmask(struct xhci_hcd *xhci, | |
3491 | struct usb_device *udev, | |
3492 | struct usb_host_endpoint **eps, unsigned int num_eps) | |
3493 | { | |
3494 | u32 changed_ep_bitmask = 0; | |
3495 | unsigned int slot_id; | |
3496 | unsigned int ep_index; | |
3497 | unsigned int ep_state; | |
3498 | int i; | |
3499 | ||
3500 | slot_id = udev->slot_id; | |
3501 | if (!xhci->devs[slot_id]) | |
3502 | return 0; | |
3503 | ||
3504 | for (i = 0; i < num_eps; i++) { | |
3505 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3506 | ep_state = xhci->devs[slot_id]->eps[ep_index].ep_state; | |
3507 | /* Are streams already being freed for the endpoint? */ | |
3508 | if (ep_state & EP_GETTING_NO_STREAMS) { | |
3509 | xhci_warn(xhci, "WARN Can't disable streams for " | |
03e64e96 JP |
3510 | "endpoint 0x%x, " |
3511 | "streams are being disabled already\n", | |
8df75f42 SS |
3512 | eps[i]->desc.bEndpointAddress); |
3513 | return 0; | |
3514 | } | |
3515 | /* Are there actually any streams to free? */ | |
3516 | if (!(ep_state & EP_HAS_STREAMS) && | |
3517 | !(ep_state & EP_GETTING_STREAMS)) { | |
3518 | xhci_warn(xhci, "WARN Can't disable streams for " | |
03e64e96 JP |
3519 | "endpoint 0x%x, " |
3520 | "streams are already disabled!\n", | |
8df75f42 SS |
3521 | eps[i]->desc.bEndpointAddress); |
3522 | xhci_warn(xhci, "WARN xhci_free_streams() called " | |
3523 | "with non-streams endpoint\n"); | |
3524 | return 0; | |
3525 | } | |
3526 | changed_ep_bitmask |= xhci_get_endpoint_flag(&eps[i]->desc); | |
3527 | } | |
3528 | return changed_ep_bitmask; | |
3529 | } | |
3530 | ||
3531 | /* | |
c2a298d9 | 3532 | * The USB device drivers use this function (through the HCD interface in USB |
8df75f42 SS |
3533 | * core) to prepare a set of bulk endpoints to use streams. Streams are used to |
3534 | * coordinate mass storage command queueing across multiple endpoints (basically | |
3535 | * a stream ID == a task ID). | |
3536 | * | |
3537 | * Setting up streams involves allocating the same size stream context array | |
3538 | * for each endpoint and issuing a configure endpoint command for all endpoints. | |
3539 | * | |
3540 | * Don't allow the call to succeed if one endpoint only supports one stream | |
3541 | * (which means it doesn't support streams at all). | |
3542 | * | |
3543 | * Drivers may get less stream IDs than they asked for, if the host controller | |
3544 | * hardware or endpoints claim they can't support the number of requested | |
3545 | * stream IDs. | |
3546 | */ | |
3969384c | 3547 | static int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev, |
8df75f42 SS |
3548 | struct usb_host_endpoint **eps, unsigned int num_eps, |
3549 | unsigned int num_streams, gfp_t mem_flags) | |
3550 | { | |
3551 | int i, ret; | |
3552 | struct xhci_hcd *xhci; | |
3553 | struct xhci_virt_device *vdev; | |
3554 | struct xhci_command *config_cmd; | |
92f8e767 | 3555 | struct xhci_input_control_ctx *ctrl_ctx; |
8df75f42 SS |
3556 | unsigned int ep_index; |
3557 | unsigned int num_stream_ctxs; | |
f9c589e1 | 3558 | unsigned int max_packet; |
8df75f42 SS |
3559 | unsigned long flags; |
3560 | u32 changed_ep_bitmask = 0; | |
3561 | ||
3562 | if (!eps) | |
3563 | return -EINVAL; | |
3564 | ||
3565 | /* Add one to the number of streams requested to account for | |
3566 | * stream 0 that is reserved for xHCI usage. | |
3567 | */ | |
3568 | num_streams += 1; | |
3569 | xhci = hcd_to_xhci(hcd); | |
3570 | xhci_dbg(xhci, "Driver wants %u stream IDs (including stream 0).\n", | |
3571 | num_streams); | |
3572 | ||
f7920884 | 3573 | /* MaxPSASize value 0 (2 streams) means streams are not supported */ |
8f873c1f HG |
3574 | if ((xhci->quirks & XHCI_BROKEN_STREAMS) || |
3575 | HCC_MAX_PSA(xhci->hcc_params) < 4) { | |
f7920884 HG |
3576 | xhci_dbg(xhci, "xHCI controller does not support streams.\n"); |
3577 | return -ENOSYS; | |
3578 | } | |
3579 | ||
14d49b7a | 3580 | config_cmd = xhci_alloc_command_with_ctx(xhci, true, mem_flags); |
74e0b564 | 3581 | if (!config_cmd) |
8df75f42 | 3582 | return -ENOMEM; |
74e0b564 | 3583 | |
4daf9df5 | 3584 | ctrl_ctx = xhci_get_input_control_ctx(config_cmd->in_ctx); |
92f8e767 SS |
3585 | if (!ctrl_ctx) { |
3586 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", | |
3587 | __func__); | |
3588 | xhci_free_command(xhci, config_cmd); | |
3589 | return -ENOMEM; | |
3590 | } | |
8df75f42 SS |
3591 | |
3592 | /* Check to make sure all endpoints are not already configured for | |
3593 | * streams. While we're at it, find the maximum number of streams that | |
3594 | * all the endpoints will support and check for duplicate endpoints. | |
3595 | */ | |
3596 | spin_lock_irqsave(&xhci->lock, flags); | |
3597 | ret = xhci_calculate_streams_and_bitmask(xhci, udev, eps, | |
3598 | num_eps, &num_streams, &changed_ep_bitmask); | |
3599 | if (ret < 0) { | |
3600 | xhci_free_command(xhci, config_cmd); | |
3601 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3602 | return ret; | |
3603 | } | |
3604 | if (num_streams <= 1) { | |
3605 | xhci_warn(xhci, "WARN: endpoints can't handle " | |
3606 | "more than one stream.\n"); | |
3607 | xhci_free_command(xhci, config_cmd); | |
3608 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3609 | return -EINVAL; | |
3610 | } | |
3611 | vdev = xhci->devs[udev->slot_id]; | |
25985edc | 3612 | /* Mark each endpoint as being in transition, so |
8df75f42 SS |
3613 | * xhci_urb_enqueue() will reject all URBs. |
3614 | */ | |
3615 | for (i = 0; i < num_eps; i++) { | |
3616 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3617 | vdev->eps[ep_index].ep_state |= EP_GETTING_STREAMS; | |
3618 | } | |
3619 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3620 | ||
3621 | /* Setup internal data structures and allocate HW data structures for | |
3622 | * streams (but don't install the HW structures in the input context | |
3623 | * until we're sure all memory allocation succeeded). | |
3624 | */ | |
3625 | xhci_calculate_streams_entries(xhci, &num_streams, &num_stream_ctxs); | |
3626 | xhci_dbg(xhci, "Need %u stream ctx entries for %u stream IDs.\n", | |
3627 | num_stream_ctxs, num_streams); | |
3628 | ||
3629 | for (i = 0; i < num_eps; i++) { | |
3630 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
734d3ddd | 3631 | max_packet = usb_endpoint_maxp(&eps[i]->desc); |
8df75f42 SS |
3632 | vdev->eps[ep_index].stream_info = xhci_alloc_stream_info(xhci, |
3633 | num_stream_ctxs, | |
f9c589e1 MN |
3634 | num_streams, |
3635 | max_packet, mem_flags); | |
8df75f42 SS |
3636 | if (!vdev->eps[ep_index].stream_info) |
3637 | goto cleanup; | |
3638 | /* Set maxPstreams in endpoint context and update deq ptr to | |
3639 | * point to stream context array. FIXME | |
3640 | */ | |
3641 | } | |
3642 | ||
3643 | /* Set up the input context for a configure endpoint command. */ | |
3644 | for (i = 0; i < num_eps; i++) { | |
3645 | struct xhci_ep_ctx *ep_ctx; | |
3646 | ||
3647 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3648 | ep_ctx = xhci_get_ep_ctx(xhci, config_cmd->in_ctx, ep_index); | |
3649 | ||
3650 | xhci_endpoint_copy(xhci, config_cmd->in_ctx, | |
3651 | vdev->out_ctx, ep_index); | |
3652 | xhci_setup_streams_ep_input_ctx(xhci, ep_ctx, | |
3653 | vdev->eps[ep_index].stream_info); | |
3654 | } | |
3655 | /* Tell the HW to drop its old copy of the endpoint context info | |
3656 | * and add the updated copy from the input context. | |
3657 | */ | |
3658 | xhci_setup_input_ctx_for_config_ep(xhci, config_cmd->in_ctx, | |
92f8e767 SS |
3659 | vdev->out_ctx, ctrl_ctx, |
3660 | changed_ep_bitmask, changed_ep_bitmask); | |
8df75f42 SS |
3661 | |
3662 | /* Issue and wait for the configure endpoint command */ | |
3663 | ret = xhci_configure_endpoint(xhci, udev, config_cmd, | |
3664 | false, false); | |
3665 | ||
3666 | /* xHC rejected the configure endpoint command for some reason, so we | |
3667 | * leave the old ring intact and free our internal streams data | |
3668 | * structure. | |
3669 | */ | |
3670 | if (ret < 0) | |
3671 | goto cleanup; | |
3672 | ||
3673 | spin_lock_irqsave(&xhci->lock, flags); | |
3674 | for (i = 0; i < num_eps; i++) { | |
3675 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3676 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; | |
3677 | xhci_dbg(xhci, "Slot %u ep ctx %u now has streams.\n", | |
3678 | udev->slot_id, ep_index); | |
3679 | vdev->eps[ep_index].ep_state |= EP_HAS_STREAMS; | |
3680 | } | |
3681 | xhci_free_command(xhci, config_cmd); | |
3682 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3683 | ||
712da5fc MN |
3684 | for (i = 0; i < num_eps; i++) { |
3685 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3686 | xhci_debugfs_create_stream_files(xhci, vdev, ep_index); | |
3687 | } | |
8df75f42 SS |
3688 | /* Subtract 1 for stream 0, which drivers can't use */ |
3689 | return num_streams - 1; | |
3690 | ||
3691 | cleanup: | |
3692 | /* If it didn't work, free the streams! */ | |
3693 | for (i = 0; i < num_eps; i++) { | |
3694 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3695 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); | |
8a007748 | 3696 | vdev->eps[ep_index].stream_info = NULL; |
8df75f42 SS |
3697 | /* FIXME Unset maxPstreams in endpoint context and |
3698 | * update deq ptr to point to normal string ring. | |
3699 | */ | |
3700 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_STREAMS; | |
3701 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; | |
3702 | xhci_endpoint_zero(xhci, vdev, eps[i]); | |
3703 | } | |
3704 | xhci_free_command(xhci, config_cmd); | |
3705 | return -ENOMEM; | |
3706 | } | |
3707 | ||
3708 | /* Transition the endpoint from using streams to being a "normal" endpoint | |
3709 | * without streams. | |
3710 | * | |
3711 | * Modify the endpoint context state, submit a configure endpoint command, | |
3712 | * and free all endpoint rings for streams if that completes successfully. | |
3713 | */ | |
3969384c | 3714 | static int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev, |
8df75f42 SS |
3715 | struct usb_host_endpoint **eps, unsigned int num_eps, |
3716 | gfp_t mem_flags) | |
3717 | { | |
3718 | int i, ret; | |
3719 | struct xhci_hcd *xhci; | |
3720 | struct xhci_virt_device *vdev; | |
3721 | struct xhci_command *command; | |
92f8e767 | 3722 | struct xhci_input_control_ctx *ctrl_ctx; |
8df75f42 SS |
3723 | unsigned int ep_index; |
3724 | unsigned long flags; | |
3725 | u32 changed_ep_bitmask; | |
3726 | ||
3727 | xhci = hcd_to_xhci(hcd); | |
3728 | vdev = xhci->devs[udev->slot_id]; | |
3729 | ||
3730 | /* Set up a configure endpoint command to remove the streams rings */ | |
3731 | spin_lock_irqsave(&xhci->lock, flags); | |
3732 | changed_ep_bitmask = xhci_calculate_no_streams_bitmask(xhci, | |
3733 | udev, eps, num_eps); | |
3734 | if (changed_ep_bitmask == 0) { | |
3735 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3736 | return -EINVAL; | |
3737 | } | |
3738 | ||
3739 | /* Use the xhci_command structure from the first endpoint. We may have | |
3740 | * allocated too many, but the driver may call xhci_free_streams() for | |
3741 | * each endpoint it grouped into one call to xhci_alloc_streams(). | |
3742 | */ | |
3743 | ep_index = xhci_get_endpoint_index(&eps[0]->desc); | |
3744 | command = vdev->eps[ep_index].stream_info->free_streams_command; | |
4daf9df5 | 3745 | ctrl_ctx = xhci_get_input_control_ctx(command->in_ctx); |
92f8e767 | 3746 | if (!ctrl_ctx) { |
1f21569c | 3747 | spin_unlock_irqrestore(&xhci->lock, flags); |
92f8e767 SS |
3748 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", |
3749 | __func__); | |
3750 | return -EINVAL; | |
3751 | } | |
3752 | ||
8df75f42 SS |
3753 | for (i = 0; i < num_eps; i++) { |
3754 | struct xhci_ep_ctx *ep_ctx; | |
3755 | ||
3756 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3757 | ep_ctx = xhci_get_ep_ctx(xhci, command->in_ctx, ep_index); | |
3758 | xhci->devs[udev->slot_id]->eps[ep_index].ep_state |= | |
3759 | EP_GETTING_NO_STREAMS; | |
3760 | ||
3761 | xhci_endpoint_copy(xhci, command->in_ctx, | |
3762 | vdev->out_ctx, ep_index); | |
4daf9df5 | 3763 | xhci_setup_no_streams_ep_input_ctx(ep_ctx, |
8df75f42 SS |
3764 | &vdev->eps[ep_index]); |
3765 | } | |
3766 | xhci_setup_input_ctx_for_config_ep(xhci, command->in_ctx, | |
92f8e767 SS |
3767 | vdev->out_ctx, ctrl_ctx, |
3768 | changed_ep_bitmask, changed_ep_bitmask); | |
8df75f42 SS |
3769 | spin_unlock_irqrestore(&xhci->lock, flags); |
3770 | ||
3771 | /* Issue and wait for the configure endpoint command, | |
3772 | * which must succeed. | |
3773 | */ | |
3774 | ret = xhci_configure_endpoint(xhci, udev, command, | |
3775 | false, true); | |
3776 | ||
3777 | /* xHC rejected the configure endpoint command for some reason, so we | |
3778 | * leave the streams rings intact. | |
3779 | */ | |
3780 | if (ret < 0) | |
3781 | return ret; | |
3782 | ||
3783 | spin_lock_irqsave(&xhci->lock, flags); | |
3784 | for (i = 0; i < num_eps; i++) { | |
3785 | ep_index = xhci_get_endpoint_index(&eps[i]->desc); | |
3786 | xhci_free_stream_info(xhci, vdev->eps[ep_index].stream_info); | |
8a007748 | 3787 | vdev->eps[ep_index].stream_info = NULL; |
8df75f42 SS |
3788 | /* FIXME Unset maxPstreams in endpoint context and |
3789 | * update deq ptr to point to normal string ring. | |
3790 | */ | |
3791 | vdev->eps[ep_index].ep_state &= ~EP_GETTING_NO_STREAMS; | |
3792 | vdev->eps[ep_index].ep_state &= ~EP_HAS_STREAMS; | |
3793 | } | |
3794 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3795 | ||
3796 | return 0; | |
3797 | } | |
3798 | ||
2cf95c18 SS |
3799 | /* |
3800 | * Deletes endpoint resources for endpoints that were active before a Reset | |
3801 | * Device command, or a Disable Slot command. The Reset Device command leaves | |
3802 | * the control endpoint intact, whereas the Disable Slot command deletes it. | |
3803 | * | |
3804 | * Must be called with xhci->lock held. | |
3805 | */ | |
3806 | void xhci_free_device_endpoint_resources(struct xhci_hcd *xhci, | |
3807 | struct xhci_virt_device *virt_dev, bool drop_control_ep) | |
3808 | { | |
3809 | int i; | |
3810 | unsigned int num_dropped_eps = 0; | |
3811 | unsigned int drop_flags = 0; | |
3812 | ||
3813 | for (i = (drop_control_ep ? 0 : 1); i < 31; i++) { | |
3814 | if (virt_dev->eps[i].ring) { | |
3815 | drop_flags |= 1 << i; | |
3816 | num_dropped_eps++; | |
3817 | } | |
3818 | } | |
3819 | xhci->num_active_eps -= num_dropped_eps; | |
3820 | if (num_dropped_eps) | |
4bdfe4c3 XR |
3821 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
3822 | "Dropped %u ep ctxs, flags = 0x%x, " | |
3823 | "%u now active.", | |
2cf95c18 SS |
3824 | num_dropped_eps, drop_flags, |
3825 | xhci->num_active_eps); | |
3826 | } | |
3827 | ||
2a8f82c4 SS |
3828 | /* |
3829 | * This submits a Reset Device Command, which will set the device state to 0, | |
3830 | * set the device address to 0, and disable all the endpoints except the default | |
3831 | * control endpoint. The USB core should come back and call | |
3832 | * xhci_address_device(), and then re-set up the configuration. If this is | |
3833 | * called because of a usb_reset_and_verify_device(), then the old alternate | |
3834 | * settings will be re-installed through the normal bandwidth allocation | |
3835 | * functions. | |
3836 | * | |
3837 | * Wait for the Reset Device command to finish. Remove all structures | |
3838 | * associated with the endpoints that were disabled. Clear the input device | |
c5628a2a | 3839 | * structure? Reset the control endpoint 0 max packet size? |
f0615c45 AX |
3840 | * |
3841 | * If the virt_dev to be reset does not exist or does not match the udev, | |
3842 | * it means the device is lost, possibly due to the xHC restore error and | |
3843 | * re-initialization during S3/S4. In this case, call xhci_alloc_dev() to | |
3844 | * re-allocate the device. | |
2a8f82c4 | 3845 | */ |
3969384c LB |
3846 | static int xhci_discover_or_reset_device(struct usb_hcd *hcd, |
3847 | struct usb_device *udev) | |
2a8f82c4 SS |
3848 | { |
3849 | int ret, i; | |
3850 | unsigned long flags; | |
3851 | struct xhci_hcd *xhci; | |
3852 | unsigned int slot_id; | |
3853 | struct xhci_virt_device *virt_dev; | |
3854 | struct xhci_command *reset_device_cmd; | |
001fd382 | 3855 | struct xhci_slot_ctx *slot_ctx; |
2e27980e | 3856 | int old_active_eps = 0; |
2a8f82c4 | 3857 | |
f0615c45 | 3858 | ret = xhci_check_args(hcd, udev, NULL, 0, false, __func__); |
2a8f82c4 SS |
3859 | if (ret <= 0) |
3860 | return ret; | |
3861 | xhci = hcd_to_xhci(hcd); | |
3862 | slot_id = udev->slot_id; | |
3863 | virt_dev = xhci->devs[slot_id]; | |
f0615c45 AX |
3864 | if (!virt_dev) { |
3865 | xhci_dbg(xhci, "The device to be reset with slot ID %u does " | |
3866 | "not exist. Re-allocate the device\n", slot_id); | |
3867 | ret = xhci_alloc_dev(hcd, udev); | |
3868 | if (ret == 1) | |
3869 | return 0; | |
3870 | else | |
3871 | return -EINVAL; | |
3872 | } | |
3873 | ||
326124a0 BC |
3874 | if (virt_dev->tt_info) |
3875 | old_active_eps = virt_dev->tt_info->active_eps; | |
3876 | ||
f0615c45 AX |
3877 | if (virt_dev->udev != udev) { |
3878 | /* If the virt_dev and the udev does not match, this virt_dev | |
3879 | * may belong to another udev. | |
3880 | * Re-allocate the device. | |
3881 | */ | |
3882 | xhci_dbg(xhci, "The device to be reset with slot ID %u does " | |
3883 | "not match the udev. Re-allocate the device\n", | |
3884 | slot_id); | |
3885 | ret = xhci_alloc_dev(hcd, udev); | |
3886 | if (ret == 1) | |
3887 | return 0; | |
3888 | else | |
3889 | return -EINVAL; | |
3890 | } | |
2a8f82c4 | 3891 | |
001fd382 ML |
3892 | /* If device is not setup, there is no point in resetting it */ |
3893 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); | |
3894 | if (GET_SLOT_STATE(le32_to_cpu(slot_ctx->dev_state)) == | |
3895 | SLOT_STATE_DISABLED) | |
3896 | return 0; | |
3897 | ||
19a7d0d6 FB |
3898 | trace_xhci_discover_or_reset_device(slot_ctx); |
3899 | ||
2a8f82c4 SS |
3900 | xhci_dbg(xhci, "Resetting device with slot ID %u\n", slot_id); |
3901 | /* Allocate the command structure that holds the struct completion. | |
3902 | * Assume we're in process context, since the normal device reset | |
3903 | * process has to wait for the device anyway. Storage devices are | |
3904 | * reset as part of error handling, so use GFP_NOIO instead of | |
3905 | * GFP_KERNEL. | |
3906 | */ | |
103afda0 | 3907 | reset_device_cmd = xhci_alloc_command(xhci, true, GFP_NOIO); |
2a8f82c4 SS |
3908 | if (!reset_device_cmd) { |
3909 | xhci_dbg(xhci, "Couldn't allocate command structure.\n"); | |
3910 | return -ENOMEM; | |
3911 | } | |
3912 | ||
3913 | /* Attempt to submit the Reset Device command to the command ring */ | |
3914 | spin_lock_irqsave(&xhci->lock, flags); | |
7a3783ef | 3915 | |
ddba5cd0 | 3916 | ret = xhci_queue_reset_device(xhci, reset_device_cmd, slot_id); |
2a8f82c4 SS |
3917 | if (ret) { |
3918 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
2a8f82c4 SS |
3919 | spin_unlock_irqrestore(&xhci->lock, flags); |
3920 | goto command_cleanup; | |
3921 | } | |
3922 | xhci_ring_cmd_db(xhci); | |
3923 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3924 | ||
3925 | /* Wait for the Reset Device command to finish */ | |
c311e391 | 3926 | wait_for_completion(reset_device_cmd->completion); |
2a8f82c4 SS |
3927 | |
3928 | /* The Reset Device command can't fail, according to the 0.95/0.96 spec, | |
3929 | * unless we tried to reset a slot ID that wasn't enabled, | |
3930 | * or the device wasn't in the addressed or configured state. | |
3931 | */ | |
3932 | ret = reset_device_cmd->status; | |
3933 | switch (ret) { | |
0b7c105a | 3934 | case COMP_COMMAND_ABORTED: |
604d02a2 | 3935 | case COMP_COMMAND_RING_STOPPED: |
c311e391 MN |
3936 | xhci_warn(xhci, "Timeout waiting for reset device command\n"); |
3937 | ret = -ETIME; | |
3938 | goto command_cleanup; | |
0b7c105a FB |
3939 | case COMP_SLOT_NOT_ENABLED_ERROR: /* 0.95 completion for bad slot ID */ |
3940 | case COMP_CONTEXT_STATE_ERROR: /* 0.96 completion code for same thing */ | |
38a532a6 | 3941 | xhci_dbg(xhci, "Can't reset device (slot ID %u) in %s state\n", |
2a8f82c4 SS |
3942 | slot_id, |
3943 | xhci_get_slot_state(xhci, virt_dev->out_ctx)); | |
38a532a6 | 3944 | xhci_dbg(xhci, "Not freeing device rings.\n"); |
2a8f82c4 SS |
3945 | /* Don't treat this as an error. May change my mind later. */ |
3946 | ret = 0; | |
3947 | goto command_cleanup; | |
3948 | case COMP_SUCCESS: | |
3949 | xhci_dbg(xhci, "Successful reset device command.\n"); | |
3950 | break; | |
3951 | default: | |
3952 | if (xhci_is_vendor_info_code(xhci, ret)) | |
3953 | break; | |
3954 | xhci_warn(xhci, "Unknown completion code %u for " | |
3955 | "reset device command.\n", ret); | |
3956 | ret = -EINVAL; | |
3957 | goto command_cleanup; | |
3958 | } | |
3959 | ||
2cf95c18 SS |
3960 | /* Free up host controller endpoint resources */ |
3961 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { | |
3962 | spin_lock_irqsave(&xhci->lock, flags); | |
3963 | /* Don't delete the default control endpoint resources */ | |
3964 | xhci_free_device_endpoint_resources(xhci, virt_dev, false); | |
3965 | spin_unlock_irqrestore(&xhci->lock, flags); | |
3966 | } | |
3967 | ||
c5628a2a | 3968 | /* Everything but endpoint 0 is disabled, so free the rings. */ |
98871e94 | 3969 | for (i = 1; i < 31; i++) { |
2dea75d9 DT |
3970 | struct xhci_virt_ep *ep = &virt_dev->eps[i]; |
3971 | ||
3972 | if (ep->ep_state & EP_HAS_STREAMS) { | |
df613834 HG |
3973 | xhci_warn(xhci, "WARN: endpoint 0x%02x has streams on device reset, freeing streams.\n", |
3974 | xhci_get_endpoint_address(i)); | |
2dea75d9 DT |
3975 | xhci_free_stream_info(xhci, ep->stream_info); |
3976 | ep->stream_info = NULL; | |
3977 | ep->ep_state &= ~EP_HAS_STREAMS; | |
3978 | } | |
3979 | ||
3980 | if (ep->ring) { | |
02b6fdc2 | 3981 | xhci_debugfs_remove_endpoint(xhci, virt_dev, i); |
c5628a2a | 3982 | xhci_free_endpoint_ring(xhci, virt_dev, i); |
2dea75d9 | 3983 | } |
2e27980e SS |
3984 | if (!list_empty(&virt_dev->eps[i].bw_endpoint_list)) |
3985 | xhci_drop_ep_from_interval_table(xhci, | |
3986 | &virt_dev->eps[i].bw_info, | |
3987 | virt_dev->bw_table, | |
3988 | udev, | |
3989 | &virt_dev->eps[i], | |
3990 | virt_dev->tt_info); | |
9af5d71d | 3991 | xhci_clear_endpoint_bw_info(&virt_dev->eps[i].bw_info); |
2a8f82c4 | 3992 | } |
2e27980e SS |
3993 | /* If necessary, update the number of active TTs on this root port */ |
3994 | xhci_update_tt_active_eps(xhci, virt_dev, old_active_eps); | |
b8c3b718 | 3995 | virt_dev->flags = 0; |
2a8f82c4 SS |
3996 | ret = 0; |
3997 | ||
3998 | command_cleanup: | |
3999 | xhci_free_command(xhci, reset_device_cmd); | |
4000 | return ret; | |
4001 | } | |
4002 | ||
3ffbba95 SS |
4003 | /* |
4004 | * At this point, the struct usb_device is about to go away, the device has | |
4005 | * disconnected, and all traffic has been stopped and the endpoints have been | |
4006 | * disabled. Free any HC data structures associated with that device. | |
4007 | */ | |
3969384c | 4008 | static void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev) |
3ffbba95 SS |
4009 | { |
4010 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
6f5165cf | 4011 | struct xhci_virt_device *virt_dev; |
19a7d0d6 | 4012 | struct xhci_slot_ctx *slot_ctx; |
a2bc47c4 | 4013 | unsigned long flags; |
64927730 | 4014 | int i, ret; |
ddba5cd0 | 4015 | |
c8476fb8 SN |
4016 | /* |
4017 | * We called pm_runtime_get_noresume when the device was attached. | |
4018 | * Decrement the counter here to allow controller to runtime suspend | |
4019 | * if no devices remain. | |
4020 | */ | |
4021 | if (xhci->quirks & XHCI_RESET_ON_RESUME) | |
e7ecf069 | 4022 | pm_runtime_put_noidle(hcd->self.controller); |
c8476fb8 | 4023 | |
64927730 | 4024 | ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__); |
7bd89b40 SS |
4025 | /* If the host is halted due to driver unload, we still need to free the |
4026 | * device. | |
4027 | */ | |
cd3f1790 | 4028 | if (ret <= 0 && ret != -ENODEV) |
3ffbba95 | 4029 | return; |
64927730 | 4030 | |
6f5165cf | 4031 | virt_dev = xhci->devs[udev->slot_id]; |
19a7d0d6 FB |
4032 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); |
4033 | trace_xhci_free_dev(slot_ctx); | |
6f5165cf SS |
4034 | |
4035 | /* Stop any wayward timer functions (which may grab the lock) */ | |
25355e04 | 4036 | for (i = 0; i < 31; i++) |
9983a5fc | 4037 | virt_dev->eps[i].ep_state &= ~EP_STOP_CMD_PENDING; |
44a182b9 | 4038 | virt_dev->udev = NULL; |
7faac195 | 4039 | xhci_disable_slot(xhci, udev->slot_id); |
a2bc47c4 MN |
4040 | |
4041 | spin_lock_irqsave(&xhci->lock, flags); | |
7faac195 | 4042 | xhci_free_virt_device(xhci, udev->slot_id); |
a2bc47c4 MN |
4043 | spin_unlock_irqrestore(&xhci->lock, flags); |
4044 | ||
f9e609b8 GZ |
4045 | } |
4046 | ||
cd3f1790 | 4047 | int xhci_disable_slot(struct xhci_hcd *xhci, u32 slot_id) |
f9e609b8 | 4048 | { |
cd3f1790 | 4049 | struct xhci_command *command; |
f9e609b8 GZ |
4050 | unsigned long flags; |
4051 | u32 state; | |
98d107b8 | 4052 | int ret; |
f9e609b8 | 4053 | |
7faac195 | 4054 | command = xhci_alloc_command(xhci, true, GFP_KERNEL); |
f9e609b8 GZ |
4055 | if (!command) |
4056 | return -ENOMEM; | |
4057 | ||
9334367c IJ |
4058 | xhci_debugfs_remove_slot(xhci, slot_id); |
4059 | ||
3ffbba95 | 4060 | spin_lock_irqsave(&xhci->lock, flags); |
c526d0d4 | 4061 | /* Don't disable the slot if the host controller is dead. */ |
b0ba9720 | 4062 | state = readl(&xhci->op_regs->status); |
7bd89b40 SS |
4063 | if (state == 0xffffffff || (xhci->xhc_state & XHCI_STATE_DYING) || |
4064 | (xhci->xhc_state & XHCI_STATE_HALTED)) { | |
c526d0d4 | 4065 | spin_unlock_irqrestore(&xhci->lock, flags); |
ddba5cd0 | 4066 | kfree(command); |
dcabc76f | 4067 | return -ENODEV; |
c526d0d4 SS |
4068 | } |
4069 | ||
f9e609b8 GZ |
4070 | ret = xhci_queue_slot_control(xhci, command, TRB_DISABLE_SLOT, |
4071 | slot_id); | |
4072 | if (ret) { | |
3ffbba95 | 4073 | spin_unlock_irqrestore(&xhci->lock, flags); |
cd3f1790 | 4074 | kfree(command); |
f9e609b8 | 4075 | return ret; |
3ffbba95 | 4076 | } |
23e3be11 | 4077 | xhci_ring_cmd_db(xhci); |
3ffbba95 | 4078 | spin_unlock_irqrestore(&xhci->lock, flags); |
7faac195 MN |
4079 | |
4080 | wait_for_completion(command->completion); | |
4081 | ||
4082 | if (command->status != COMP_SUCCESS) | |
4083 | xhci_warn(xhci, "Unsuccessful disable slot %u command, status %d\n", | |
4084 | slot_id, command->status); | |
4085 | ||
4086 | xhci_free_command(xhci, command); | |
4087 | ||
98d107b8 | 4088 | return 0; |
3ffbba95 SS |
4089 | } |
4090 | ||
2cf95c18 SS |
4091 | /* |
4092 | * Checks if we have enough host controller resources for the default control | |
4093 | * endpoint. | |
4094 | * | |
4095 | * Must be called with xhci->lock held. | |
4096 | */ | |
4097 | static int xhci_reserve_host_control_ep_resources(struct xhci_hcd *xhci) | |
4098 | { | |
4099 | if (xhci->num_active_eps + 1 > xhci->limit_active_eps) { | |
4bdfe4c3 XR |
4100 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
4101 | "Not enough ep ctxs: " | |
4102 | "%u active, need to add 1, limit is %u.", | |
2cf95c18 SS |
4103 | xhci->num_active_eps, xhci->limit_active_eps); |
4104 | return -ENOMEM; | |
4105 | } | |
4106 | xhci->num_active_eps += 1; | |
4bdfe4c3 XR |
4107 | xhci_dbg_trace(xhci, trace_xhci_dbg_quirks, |
4108 | "Adding 1 ep ctx, %u now active.", | |
2cf95c18 SS |
4109 | xhci->num_active_eps); |
4110 | return 0; | |
4111 | } | |
4112 | ||
4113 | ||
3ffbba95 SS |
4114 | /* |
4115 | * Returns 0 if the xHC ran out of device slots, the Enable Slot command | |
4116 | * timed out, or allocating memory failed. Returns 1 on success. | |
4117 | */ | |
4118 | int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev) | |
4119 | { | |
4120 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
19a7d0d6 FB |
4121 | struct xhci_virt_device *vdev; |
4122 | struct xhci_slot_ctx *slot_ctx; | |
3ffbba95 | 4123 | unsigned long flags; |
a00918d0 | 4124 | int ret, slot_id; |
ddba5cd0 MN |
4125 | struct xhci_command *command; |
4126 | ||
103afda0 | 4127 | command = xhci_alloc_command(xhci, true, GFP_KERNEL); |
ddba5cd0 MN |
4128 | if (!command) |
4129 | return 0; | |
3ffbba95 SS |
4130 | |
4131 | spin_lock_irqsave(&xhci->lock, flags); | |
ddba5cd0 | 4132 | ret = xhci_queue_slot_control(xhci, command, TRB_ENABLE_SLOT, 0); |
3ffbba95 SS |
4133 | if (ret) { |
4134 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4135 | xhci_dbg(xhci, "FIXME: allocate a command ring segment\n"); | |
87e44f2a | 4136 | xhci_free_command(xhci, command); |
3ffbba95 SS |
4137 | return 0; |
4138 | } | |
23e3be11 | 4139 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
4140 | spin_unlock_irqrestore(&xhci->lock, flags); |
4141 | ||
c311e391 | 4142 | wait_for_completion(command->completion); |
c2d3d49b | 4143 | slot_id = command->slot_id; |
3ffbba95 | 4144 | |
a00918d0 | 4145 | if (!slot_id || command->status != COMP_SUCCESS) { |
e11487f1 MN |
4146 | xhci_err(xhci, "Error while assigning device slot ID: %s\n", |
4147 | xhci_trb_comp_code_string(command->status)); | |
be982038 SS |
4148 | xhci_err(xhci, "Max number of devices this xHCI host supports is %u.\n", |
4149 | HCS_MAX_SLOTS( | |
4150 | readl(&xhci->cap_regs->hcs_params1))); | |
87e44f2a | 4151 | xhci_free_command(xhci, command); |
3ffbba95 SS |
4152 | return 0; |
4153 | } | |
2cf95c18 | 4154 | |
cd3f1790 LB |
4155 | xhci_free_command(xhci, command); |
4156 | ||
2cf95c18 SS |
4157 | if ((xhci->quirks & XHCI_EP_LIMIT_QUIRK)) { |
4158 | spin_lock_irqsave(&xhci->lock, flags); | |
4159 | ret = xhci_reserve_host_control_ep_resources(xhci); | |
4160 | if (ret) { | |
4161 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4162 | xhci_warn(xhci, "Not enough host resources, " | |
4163 | "active endpoint contexts = %u\n", | |
4164 | xhci->num_active_eps); | |
4165 | goto disable_slot; | |
4166 | } | |
4167 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4168 | } | |
4169 | /* Use GFP_NOIO, since this function can be called from | |
a6d940dd SS |
4170 | * xhci_discover_or_reset_device(), which may be called as part of |
4171 | * mass storage driver error handling. | |
4172 | */ | |
a00918d0 | 4173 | if (!xhci_alloc_virt_device(xhci, slot_id, udev, GFP_NOIO)) { |
3ffbba95 | 4174 | xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n"); |
2cf95c18 | 4175 | goto disable_slot; |
3ffbba95 | 4176 | } |
19a7d0d6 FB |
4177 | vdev = xhci->devs[slot_id]; |
4178 | slot_ctx = xhci_get_slot_ctx(xhci, vdev->out_ctx); | |
4179 | trace_xhci_alloc_dev(slot_ctx); | |
4180 | ||
a00918d0 | 4181 | udev->slot_id = slot_id; |
c8476fb8 | 4182 | |
02b6fdc2 LB |
4183 | xhci_debugfs_create_slot(xhci, slot_id); |
4184 | ||
c8476fb8 SN |
4185 | /* |
4186 | * If resetting upon resume, we can't put the controller into runtime | |
4187 | * suspend if there is a device attached. | |
4188 | */ | |
4189 | if (xhci->quirks & XHCI_RESET_ON_RESUME) | |
e7ecf069 | 4190 | pm_runtime_get_noresume(hcd->self.controller); |
c8476fb8 | 4191 | |
3ffbba95 SS |
4192 | /* Is this a LS or FS device under a HS hub? */ |
4193 | /* Hub or peripherial? */ | |
3ffbba95 | 4194 | return 1; |
2cf95c18 SS |
4195 | |
4196 | disable_slot: | |
7faac195 MN |
4197 | xhci_disable_slot(xhci, udev->slot_id); |
4198 | xhci_free_virt_device(xhci, udev->slot_id); | |
11ec7588 LB |
4199 | |
4200 | return 0; | |
3ffbba95 SS |
4201 | } |
4202 | ||
4203 | /* | |
48fc7dbd DW |
4204 | * Issue an Address Device command and optionally send a corresponding |
4205 | * SetAddress request to the device. | |
3ffbba95 | 4206 | */ |
48fc7dbd DW |
4207 | static int xhci_setup_device(struct usb_hcd *hcd, struct usb_device *udev, |
4208 | enum xhci_setup_dev setup) | |
3ffbba95 | 4209 | { |
6f8ffc0b | 4210 | const char *act = setup == SETUP_CONTEXT_ONLY ? "context" : "address"; |
3ffbba95 | 4211 | unsigned long flags; |
3ffbba95 SS |
4212 | struct xhci_virt_device *virt_dev; |
4213 | int ret = 0; | |
4214 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
d115b048 JY |
4215 | struct xhci_slot_ctx *slot_ctx; |
4216 | struct xhci_input_control_ctx *ctrl_ctx; | |
8e595a5d | 4217 | u64 temp_64; |
a00918d0 CB |
4218 | struct xhci_command *command = NULL; |
4219 | ||
4220 | mutex_lock(&xhci->mutex); | |
3ffbba95 | 4221 | |
90797aee LB |
4222 | if (xhci->xhc_state) { /* dying, removing or halted */ |
4223 | ret = -ESHUTDOWN; | |
448116bf | 4224 | goto out; |
90797aee | 4225 | } |
448116bf | 4226 | |
3ffbba95 | 4227 | if (!udev->slot_id) { |
84a99f6f XR |
4228 | xhci_dbg_trace(xhci, trace_xhci_dbg_address, |
4229 | "Bad Slot ID %d", udev->slot_id); | |
a00918d0 CB |
4230 | ret = -EINVAL; |
4231 | goto out; | |
3ffbba95 SS |
4232 | } |
4233 | ||
3ffbba95 SS |
4234 | virt_dev = xhci->devs[udev->slot_id]; |
4235 | ||
7ed603ec ME |
4236 | if (WARN_ON(!virt_dev)) { |
4237 | /* | |
4238 | * In plug/unplug torture test with an NEC controller, | |
4239 | * a zero-dereference was observed once due to virt_dev = 0. | |
4240 | * Print useful debug rather than crash if it is observed again! | |
4241 | */ | |
4242 | xhci_warn(xhci, "Virt dev invalid for slot_id 0x%x!\n", | |
4243 | udev->slot_id); | |
a00918d0 CB |
4244 | ret = -EINVAL; |
4245 | goto out; | |
7ed603ec | 4246 | } |
19a7d0d6 FB |
4247 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); |
4248 | trace_xhci_setup_device_slot(slot_ctx); | |
7ed603ec | 4249 | |
f161ead7 | 4250 | if (setup == SETUP_CONTEXT_ONLY) { |
f161ead7 MN |
4251 | if (GET_SLOT_STATE(le32_to_cpu(slot_ctx->dev_state)) == |
4252 | SLOT_STATE_DEFAULT) { | |
4253 | xhci_dbg(xhci, "Slot already in default state\n"); | |
a00918d0 | 4254 | goto out; |
f161ead7 MN |
4255 | } |
4256 | } | |
4257 | ||
103afda0 | 4258 | command = xhci_alloc_command(xhci, true, GFP_KERNEL); |
a00918d0 CB |
4259 | if (!command) { |
4260 | ret = -ENOMEM; | |
4261 | goto out; | |
4262 | } | |
ddba5cd0 MN |
4263 | |
4264 | command->in_ctx = virt_dev->in_ctx; | |
ddba5cd0 | 4265 | |
f0615c45 | 4266 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx); |
4daf9df5 | 4267 | ctrl_ctx = xhci_get_input_control_ctx(virt_dev->in_ctx); |
92f8e767 SS |
4268 | if (!ctrl_ctx) { |
4269 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", | |
4270 | __func__); | |
a00918d0 CB |
4271 | ret = -EINVAL; |
4272 | goto out; | |
92f8e767 | 4273 | } |
f0615c45 AX |
4274 | /* |
4275 | * If this is the first Set Address since device plug-in or | |
4276 | * virt_device realloaction after a resume with an xHCI power loss, | |
4277 | * then set up the slot context. | |
4278 | */ | |
4279 | if (!slot_ctx->dev_info) | |
3ffbba95 | 4280 | xhci_setup_addressable_virt_dev(xhci, udev); |
f0615c45 | 4281 | /* Otherwise, update the control endpoint ring enqueue pointer. */ |
2d1ee590 SS |
4282 | else |
4283 | xhci_copy_ep0_dequeue_into_input_ctx(xhci, udev); | |
d31c285b SS |
4284 | ctrl_ctx->add_flags = cpu_to_le32(SLOT_FLAG | EP0_FLAG); |
4285 | ctrl_ctx->drop_flags = 0; | |
4286 | ||
1d27fabe | 4287 | trace_xhci_address_ctx(xhci, virt_dev->in_ctx, |
0c052aab | 4288 | le32_to_cpu(slot_ctx->dev_info) >> 27); |
3ffbba95 | 4289 | |
90d6d573 | 4290 | trace_xhci_address_ctrl_ctx(ctrl_ctx); |
f88ba78d | 4291 | spin_lock_irqsave(&xhci->lock, flags); |
a711edee | 4292 | trace_xhci_setup_device(virt_dev); |
ddba5cd0 | 4293 | ret = xhci_queue_address_device(xhci, command, virt_dev->in_ctx->dma, |
48fc7dbd | 4294 | udev->slot_id, setup); |
3ffbba95 SS |
4295 | if (ret) { |
4296 | spin_unlock_irqrestore(&xhci->lock, flags); | |
84a99f6f XR |
4297 | xhci_dbg_trace(xhci, trace_xhci_dbg_address, |
4298 | "FIXME: allocate a command ring segment"); | |
a00918d0 | 4299 | goto out; |
3ffbba95 | 4300 | } |
23e3be11 | 4301 | xhci_ring_cmd_db(xhci); |
3ffbba95 SS |
4302 | spin_unlock_irqrestore(&xhci->lock, flags); |
4303 | ||
4304 | /* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */ | |
c311e391 MN |
4305 | wait_for_completion(command->completion); |
4306 | ||
3ffbba95 SS |
4307 | /* FIXME: From section 4.3.4: "Software shall be responsible for timing |
4308 | * the SetAddress() "recovery interval" required by USB and aborting the | |
4309 | * command on a timeout. | |
4310 | */ | |
9ea1833e | 4311 | switch (command->status) { |
0b7c105a | 4312 | case COMP_COMMAND_ABORTED: |
604d02a2 | 4313 | case COMP_COMMAND_RING_STOPPED: |
c311e391 MN |
4314 | xhci_warn(xhci, "Timeout while waiting for setup device command\n"); |
4315 | ret = -ETIME; | |
4316 | break; | |
0b7c105a FB |
4317 | case COMP_CONTEXT_STATE_ERROR: |
4318 | case COMP_SLOT_NOT_ENABLED_ERROR: | |
6f8ffc0b DW |
4319 | xhci_err(xhci, "Setup ERROR: setup %s command for slot %d.\n", |
4320 | act, udev->slot_id); | |
3ffbba95 SS |
4321 | ret = -EINVAL; |
4322 | break; | |
0b7c105a | 4323 | case COMP_USB_TRANSACTION_ERROR: |
6f8ffc0b | 4324 | dev_warn(&udev->dev, "Device not responding to setup %s.\n", act); |
651aaf36 LB |
4325 | |
4326 | mutex_unlock(&xhci->mutex); | |
4327 | ret = xhci_disable_slot(xhci, udev->slot_id); | |
7faac195 | 4328 | xhci_free_virt_device(xhci, udev->slot_id); |
651aaf36 LB |
4329 | if (!ret) |
4330 | xhci_alloc_dev(hcd, udev); | |
4331 | kfree(command->completion); | |
4332 | kfree(command); | |
4333 | return -EPROTO; | |
0b7c105a | 4334 | case COMP_INCOMPATIBLE_DEVICE_ERROR: |
6f8ffc0b DW |
4335 | dev_warn(&udev->dev, |
4336 | "ERROR: Incompatible device for setup %s command\n", act); | |
f6ba6fe2 AH |
4337 | ret = -ENODEV; |
4338 | break; | |
3ffbba95 | 4339 | case COMP_SUCCESS: |
84a99f6f | 4340 | xhci_dbg_trace(xhci, trace_xhci_dbg_address, |
6f8ffc0b | 4341 | "Successful setup %s command", act); |
3ffbba95 SS |
4342 | break; |
4343 | default: | |
6f8ffc0b DW |
4344 | xhci_err(xhci, |
4345 | "ERROR: unexpected setup %s command completion code 0x%x.\n", | |
9ea1833e | 4346 | act, command->status); |
1d27fabe | 4347 | trace_xhci_address_ctx(xhci, virt_dev->out_ctx, 1); |
3ffbba95 SS |
4348 | ret = -EINVAL; |
4349 | break; | |
4350 | } | |
a00918d0 CB |
4351 | if (ret) |
4352 | goto out; | |
f7b2e403 | 4353 | temp_64 = xhci_read_64(xhci, &xhci->op_regs->dcbaa_ptr); |
84a99f6f XR |
4354 | xhci_dbg_trace(xhci, trace_xhci_dbg_address, |
4355 | "Op regs DCBAA ptr = %#016llx", temp_64); | |
4356 | xhci_dbg_trace(xhci, trace_xhci_dbg_address, | |
4357 | "Slot ID %d dcbaa entry @%p = %#016llx", | |
4358 | udev->slot_id, | |
4359 | &xhci->dcbaa->dev_context_ptrs[udev->slot_id], | |
4360 | (unsigned long long) | |
4361 | le64_to_cpu(xhci->dcbaa->dev_context_ptrs[udev->slot_id])); | |
4362 | xhci_dbg_trace(xhci, trace_xhci_dbg_address, | |
4363 | "Output Context DMA address = %#08llx", | |
d115b048 | 4364 | (unsigned long long)virt_dev->out_ctx->dma); |
1d27fabe | 4365 | trace_xhci_address_ctx(xhci, virt_dev->in_ctx, |
0c052aab | 4366 | le32_to_cpu(slot_ctx->dev_info) >> 27); |
3ffbba95 SS |
4367 | /* |
4368 | * USB core uses address 1 for the roothubs, so we add one to the | |
4369 | * address given back to us by the HC. | |
4370 | */ | |
1d27fabe | 4371 | trace_xhci_address_ctx(xhci, virt_dev->out_ctx, |
0c052aab | 4372 | le32_to_cpu(slot_ctx->dev_info) >> 27); |
f94e0186 | 4373 | /* Zero the input context control for later use */ |
d115b048 JY |
4374 | ctrl_ctx->add_flags = 0; |
4375 | ctrl_ctx->drop_flags = 0; | |
4998f1ef JL |
4376 | slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->out_ctx); |
4377 | udev->devaddr = (u8)(le32_to_cpu(slot_ctx->dev_state) & DEV_ADDR_MASK); | |
3ffbba95 | 4378 | |
84a99f6f | 4379 | xhci_dbg_trace(xhci, trace_xhci_dbg_address, |
a2cdc343 DW |
4380 | "Internal device address = %d", |
4381 | le32_to_cpu(slot_ctx->dev_state) & DEV_ADDR_MASK); | |
a00918d0 CB |
4382 | out: |
4383 | mutex_unlock(&xhci->mutex); | |
87e44f2a LB |
4384 | if (command) { |
4385 | kfree(command->completion); | |
4386 | kfree(command); | |
4387 | } | |
a00918d0 | 4388 | return ret; |
3ffbba95 SS |
4389 | } |
4390 | ||
3969384c | 4391 | static int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev) |
48fc7dbd DW |
4392 | { |
4393 | return xhci_setup_device(hcd, udev, SETUP_CONTEXT_ADDRESS); | |
4394 | } | |
4395 | ||
3969384c | 4396 | static int xhci_enable_device(struct usb_hcd *hcd, struct usb_device *udev) |
48fc7dbd DW |
4397 | { |
4398 | return xhci_setup_device(hcd, udev, SETUP_CONTEXT_ONLY); | |
4399 | } | |
4400 | ||
3f5eb141 LT |
4401 | /* |
4402 | * Transfer the port index into real index in the HW port status | |
4403 | * registers. Caculate offset between the port's PORTSC register | |
4404 | * and port status base. Divide the number of per port register | |
4405 | * to get the real index. The raw port number bases 1. | |
4406 | */ | |
4407 | int xhci_find_raw_port_number(struct usb_hcd *hcd, int port1) | |
4408 | { | |
38986ffa | 4409 | struct xhci_hub *rhub; |
3f5eb141 | 4410 | |
38986ffa MN |
4411 | rhub = xhci_get_rhub(hcd); |
4412 | return rhub->ports[port1 - 1]->hw_portnum + 1; | |
3f5eb141 LT |
4413 | } |
4414 | ||
a558ccdc MN |
4415 | /* |
4416 | * Issue an Evaluate Context command to change the Maximum Exit Latency in the | |
4417 | * slot context. If that succeeds, store the new MEL in the xhci_virt_device. | |
4418 | */ | |
d5c82feb | 4419 | static int __maybe_unused xhci_change_max_exit_latency(struct xhci_hcd *xhci, |
a558ccdc MN |
4420 | struct usb_device *udev, u16 max_exit_latency) |
4421 | { | |
4422 | struct xhci_virt_device *virt_dev; | |
4423 | struct xhci_command *command; | |
4424 | struct xhci_input_control_ctx *ctrl_ctx; | |
4425 | struct xhci_slot_ctx *slot_ctx; | |
4426 | unsigned long flags; | |
4427 | int ret; | |
4428 | ||
5c2a380a MN |
4429 | command = xhci_alloc_command_with_ctx(xhci, true, GFP_KERNEL); |
4430 | if (!command) | |
4431 | return -ENOMEM; | |
4432 | ||
a558ccdc | 4433 | spin_lock_irqsave(&xhci->lock, flags); |
96044694 MN |
4434 | |
4435 | virt_dev = xhci->devs[udev->slot_id]; | |
4436 | ||
4437 | /* | |
4438 | * virt_dev might not exists yet if xHC resumed from hibernate (S4) and | |
4439 | * xHC was re-initialized. Exit latency will be set later after | |
4440 | * hub_port_finish_reset() is done and xhci->devs[] are re-allocated | |
4441 | */ | |
4442 | ||
4443 | if (!virt_dev || max_exit_latency == virt_dev->current_mel) { | |
a558ccdc MN |
4444 | spin_unlock_irqrestore(&xhci->lock, flags); |
4445 | return 0; | |
4446 | } | |
4447 | ||
4448 | /* Attempt to issue an Evaluate Context command to change the MEL. */ | |
4daf9df5 | 4449 | ctrl_ctx = xhci_get_input_control_ctx(command->in_ctx); |
92f8e767 SS |
4450 | if (!ctrl_ctx) { |
4451 | spin_unlock_irqrestore(&xhci->lock, flags); | |
5c2a380a | 4452 | xhci_free_command(xhci, command); |
92f8e767 SS |
4453 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", |
4454 | __func__); | |
4455 | return -ENOMEM; | |
4456 | } | |
4457 | ||
a558ccdc MN |
4458 | xhci_slot_copy(xhci, command->in_ctx, virt_dev->out_ctx); |
4459 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4460 | ||
a558ccdc MN |
4461 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
4462 | slot_ctx = xhci_get_slot_ctx(xhci, command->in_ctx); | |
4463 | slot_ctx->dev_info2 &= cpu_to_le32(~((u32) MAX_EXIT)); | |
4464 | slot_ctx->dev_info2 |= cpu_to_le32(max_exit_latency); | |
4801d4ea | 4465 | slot_ctx->dev_state = 0; |
a558ccdc | 4466 | |
3a7fa5be XR |
4467 | xhci_dbg_trace(xhci, trace_xhci_dbg_context_change, |
4468 | "Set up evaluate context for LPM MEL change."); | |
a558ccdc MN |
4469 | |
4470 | /* Issue and wait for the evaluate context command. */ | |
4471 | ret = xhci_configure_endpoint(xhci, udev, command, | |
4472 | true, true); | |
a558ccdc MN |
4473 | |
4474 | if (!ret) { | |
4475 | spin_lock_irqsave(&xhci->lock, flags); | |
4476 | virt_dev->current_mel = max_exit_latency; | |
4477 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4478 | } | |
5c2a380a MN |
4479 | |
4480 | xhci_free_command(xhci, command); | |
4481 | ||
a558ccdc MN |
4482 | return ret; |
4483 | } | |
4484 | ||
ceb6c9c8 | 4485 | #ifdef CONFIG_PM |
9574323c AX |
4486 | |
4487 | /* BESL to HIRD Encoding array for USB2 LPM */ | |
4488 | static int xhci_besl_encoding[16] = {125, 150, 200, 300, 400, 500, 1000, 2000, | |
4489 | 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000}; | |
4490 | ||
4491 | /* Calculate HIRD/BESL for USB2 PORTPMSC*/ | |
f99298bf AX |
4492 | static int xhci_calculate_hird_besl(struct xhci_hcd *xhci, |
4493 | struct usb_device *udev) | |
9574323c | 4494 | { |
f99298bf AX |
4495 | int u2del, besl, besl_host; |
4496 | int besl_device = 0; | |
4497 | u32 field; | |
4498 | ||
4499 | u2del = HCS_U2_LATENCY(xhci->hcs_params3); | |
4500 | field = le32_to_cpu(udev->bos->ext_cap->bmAttributes); | |
9574323c | 4501 | |
f99298bf AX |
4502 | if (field & USB_BESL_SUPPORT) { |
4503 | for (besl_host = 0; besl_host < 16; besl_host++) { | |
4504 | if (xhci_besl_encoding[besl_host] >= u2del) | |
9574323c AX |
4505 | break; |
4506 | } | |
f99298bf AX |
4507 | /* Use baseline BESL value as default */ |
4508 | if (field & USB_BESL_BASELINE_VALID) | |
4509 | besl_device = USB_GET_BESL_BASELINE(field); | |
4510 | else if (field & USB_BESL_DEEP_VALID) | |
4511 | besl_device = USB_GET_BESL_DEEP(field); | |
9574323c AX |
4512 | } else { |
4513 | if (u2del <= 50) | |
f99298bf | 4514 | besl_host = 0; |
9574323c | 4515 | else |
f99298bf | 4516 | besl_host = (u2del - 51) / 75 + 1; |
9574323c AX |
4517 | } |
4518 | ||
f99298bf AX |
4519 | besl = besl_host + besl_device; |
4520 | if (besl > 15) | |
4521 | besl = 15; | |
4522 | ||
4523 | return besl; | |
9574323c AX |
4524 | } |
4525 | ||
a558ccdc MN |
4526 | /* Calculate BESLD, L1 timeout and HIRDM for USB2 PORTHLPMC */ |
4527 | static int xhci_calculate_usb2_hw_lpm_params(struct usb_device *udev) | |
4528 | { | |
4529 | u32 field; | |
4530 | int l1; | |
4531 | int besld = 0; | |
4532 | int hirdm = 0; | |
4533 | ||
4534 | field = le32_to_cpu(udev->bos->ext_cap->bmAttributes); | |
4535 | ||
4536 | /* xHCI l1 is set in steps of 256us, xHCI 1.0 section 5.4.11.2 */ | |
17f34867 | 4537 | l1 = udev->l1_params.timeout / 256; |
a558ccdc MN |
4538 | |
4539 | /* device has preferred BESLD */ | |
4540 | if (field & USB_BESL_DEEP_VALID) { | |
4541 | besld = USB_GET_BESL_DEEP(field); | |
4542 | hirdm = 1; | |
4543 | } | |
4544 | ||
4545 | return PORT_BESLD(besld) | PORT_L1_TIMEOUT(l1) | PORT_HIRDM(hirdm); | |
4546 | } | |
4547 | ||
3969384c | 4548 | static int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd, |
65580b43 AX |
4549 | struct usb_device *udev, int enable) |
4550 | { | |
4551 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
38986ffa | 4552 | struct xhci_port **ports; |
a558ccdc MN |
4553 | __le32 __iomem *pm_addr, *hlpm_addr; |
4554 | u32 pm_val, hlpm_val, field; | |
65580b43 AX |
4555 | unsigned int port_num; |
4556 | unsigned long flags; | |
a558ccdc MN |
4557 | int hird, exit_latency; |
4558 | int ret; | |
65580b43 | 4559 | |
f0c472a6 KHF |
4560 | if (xhci->quirks & XHCI_HW_LPM_DISABLE) |
4561 | return -EPERM; | |
4562 | ||
b50107bb | 4563 | if (hcd->speed >= HCD_USB3 || !xhci->hw_lpm_support || |
65580b43 AX |
4564 | !udev->lpm_capable) |
4565 | return -EPERM; | |
4566 | ||
4567 | if (!udev->parent || udev->parent->parent || | |
4568 | udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
4569 | return -EPERM; | |
4570 | ||
4571 | if (udev->usb2_hw_lpm_capable != 1) | |
4572 | return -EPERM; | |
4573 | ||
4574 | spin_lock_irqsave(&xhci->lock, flags); | |
4575 | ||
38986ffa | 4576 | ports = xhci->usb2_rhub.ports; |
65580b43 | 4577 | port_num = udev->portnum - 1; |
38986ffa | 4578 | pm_addr = ports[port_num]->addr + PORTPMSC; |
b0ba9720 | 4579 | pm_val = readl(pm_addr); |
38986ffa | 4580 | hlpm_addr = ports[port_num]->addr + PORTHLPMC; |
65580b43 AX |
4581 | |
4582 | xhci_dbg(xhci, "%s port %d USB2 hardware LPM\n", | |
654a55d3 | 4583 | enable ? "enable" : "disable", port_num + 1); |
65580b43 | 4584 | |
f0c472a6 | 4585 | if (enable) { |
a558ccdc MN |
4586 | /* Host supports BESL timeout instead of HIRD */ |
4587 | if (udev->usb2_hw_lpm_besl_capable) { | |
4588 | /* if device doesn't have a preferred BESL value use a | |
4589 | * default one which works with mixed HIRD and BESL | |
4590 | * systems. See XHCI_DEFAULT_BESL definition in xhci.h | |
4591 | */ | |
7aa1bb2f | 4592 | field = le32_to_cpu(udev->bos->ext_cap->bmAttributes); |
a558ccdc MN |
4593 | if ((field & USB_BESL_SUPPORT) && |
4594 | (field & USB_BESL_BASELINE_VALID)) | |
4595 | hird = USB_GET_BESL_BASELINE(field); | |
4596 | else | |
17f34867 | 4597 | hird = udev->l1_params.besl; |
a558ccdc MN |
4598 | |
4599 | exit_latency = xhci_besl_encoding[hird]; | |
4600 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4601 | ||
a558ccdc MN |
4602 | ret = xhci_change_max_exit_latency(xhci, udev, |
4603 | exit_latency); | |
a558ccdc MN |
4604 | if (ret < 0) |
4605 | return ret; | |
4606 | spin_lock_irqsave(&xhci->lock, flags); | |
4607 | ||
4608 | hlpm_val = xhci_calculate_usb2_hw_lpm_params(udev); | |
204b7793 | 4609 | writel(hlpm_val, hlpm_addr); |
a558ccdc | 4610 | /* flush write */ |
b0ba9720 | 4611 | readl(hlpm_addr); |
a558ccdc MN |
4612 | } else { |
4613 | hird = xhci_calculate_hird_besl(xhci, udev); | |
4614 | } | |
4615 | ||
4616 | pm_val &= ~PORT_HIRD_MASK; | |
58e21f73 | 4617 | pm_val |= PORT_HIRD(hird) | PORT_RWE | PORT_L1DS(udev->slot_id); |
204b7793 | 4618 | writel(pm_val, pm_addr); |
b0ba9720 | 4619 | pm_val = readl(pm_addr); |
a558ccdc | 4620 | pm_val |= PORT_HLE; |
204b7793 | 4621 | writel(pm_val, pm_addr); |
a558ccdc | 4622 | /* flush write */ |
b0ba9720 | 4623 | readl(pm_addr); |
65580b43 | 4624 | } else { |
58e21f73 | 4625 | pm_val &= ~(PORT_HLE | PORT_RWE | PORT_HIRD_MASK | PORT_L1DS_MASK); |
204b7793 | 4626 | writel(pm_val, pm_addr); |
a558ccdc | 4627 | /* flush write */ |
b0ba9720 | 4628 | readl(pm_addr); |
a558ccdc MN |
4629 | if (udev->usb2_hw_lpm_besl_capable) { |
4630 | spin_unlock_irqrestore(&xhci->lock, flags); | |
a558ccdc | 4631 | xhci_change_max_exit_latency(xhci, udev, 0); |
b3d71abd KHF |
4632 | readl_poll_timeout(ports[port_num]->addr, pm_val, |
4633 | (pm_val & PORT_PLS_MASK) == XDEV_U0, | |
4634 | 100, 10000); | |
a558ccdc MN |
4635 | return 0; |
4636 | } | |
65580b43 AX |
4637 | } |
4638 | ||
4639 | spin_unlock_irqrestore(&xhci->lock, flags); | |
4640 | return 0; | |
4641 | } | |
4642 | ||
b630d4b9 MN |
4643 | /* check if a usb2 port supports a given extened capability protocol |
4644 | * only USB2 ports extended protocol capability values are cached. | |
4645 | * Return 1 if capability is supported | |
4646 | */ | |
4647 | static int xhci_check_usb2_port_capability(struct xhci_hcd *xhci, int port, | |
4648 | unsigned capability) | |
4649 | { | |
4650 | u32 port_offset, port_count; | |
4651 | int i; | |
4652 | ||
4653 | for (i = 0; i < xhci->num_ext_caps; i++) { | |
4654 | if (xhci->ext_caps[i] & capability) { | |
4655 | /* port offsets starts at 1 */ | |
4656 | port_offset = XHCI_EXT_PORT_OFF(xhci->ext_caps[i]) - 1; | |
4657 | port_count = XHCI_EXT_PORT_COUNT(xhci->ext_caps[i]); | |
4658 | if (port >= port_offset && | |
4659 | port < port_offset + port_count) | |
4660 | return 1; | |
4661 | } | |
4662 | } | |
4663 | return 0; | |
4664 | } | |
4665 | ||
3969384c | 4666 | static int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev) |
b01bcbf7 SS |
4667 | { |
4668 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
b630d4b9 | 4669 | int portnum = udev->portnum - 1; |
b01bcbf7 | 4670 | |
f1fd62a6 | 4671 | if (hcd->speed >= HCD_USB3 || !udev->lpm_capable) |
de68bab4 SS |
4672 | return 0; |
4673 | ||
4674 | /* we only support lpm for non-hub device connected to root hub yet */ | |
4675 | if (!udev->parent || udev->parent->parent || | |
4676 | udev->descriptor.bDeviceClass == USB_CLASS_HUB) | |
4677 | return 0; | |
4678 | ||
4679 | if (xhci->hw_lpm_support == 1 && | |
4680 | xhci_check_usb2_port_capability( | |
4681 | xhci, portnum, XHCI_HLC)) { | |
4682 | udev->usb2_hw_lpm_capable = 1; | |
4683 | udev->l1_params.timeout = XHCI_L1_TIMEOUT; | |
4684 | udev->l1_params.besl = XHCI_DEFAULT_BESL; | |
4685 | if (xhci_check_usb2_port_capability(xhci, portnum, | |
4686 | XHCI_BLC)) | |
4687 | udev->usb2_hw_lpm_besl_capable = 1; | |
b01bcbf7 SS |
4688 | } |
4689 | ||
4690 | return 0; | |
4691 | } | |
4692 | ||
3b3db026 SS |
4693 | /*---------------------- USB 3.0 Link PM functions ------------------------*/ |
4694 | ||
e3567d2c SS |
4695 | /* Service interval in nanoseconds = 2^(bInterval - 1) * 125us * 1000ns / 1us */ |
4696 | static unsigned long long xhci_service_interval_to_ns( | |
4697 | struct usb_endpoint_descriptor *desc) | |
4698 | { | |
16b45fdf | 4699 | return (1ULL << (desc->bInterval - 1)) * 125 * 1000; |
e3567d2c SS |
4700 | } |
4701 | ||
3b3db026 SS |
4702 | static u16 xhci_get_timeout_no_hub_lpm(struct usb_device *udev, |
4703 | enum usb3_link_state state) | |
4704 | { | |
4705 | unsigned long long sel; | |
4706 | unsigned long long pel; | |
4707 | unsigned int max_sel_pel; | |
4708 | char *state_name; | |
4709 | ||
4710 | switch (state) { | |
4711 | case USB3_LPM_U1: | |
4712 | /* Convert SEL and PEL stored in nanoseconds to microseconds */ | |
4713 | sel = DIV_ROUND_UP(udev->u1_params.sel, 1000); | |
4714 | pel = DIV_ROUND_UP(udev->u1_params.pel, 1000); | |
4715 | max_sel_pel = USB3_LPM_MAX_U1_SEL_PEL; | |
4716 | state_name = "U1"; | |
4717 | break; | |
4718 | case USB3_LPM_U2: | |
4719 | sel = DIV_ROUND_UP(udev->u2_params.sel, 1000); | |
4720 | pel = DIV_ROUND_UP(udev->u2_params.pel, 1000); | |
4721 | max_sel_pel = USB3_LPM_MAX_U2_SEL_PEL; | |
4722 | state_name = "U2"; | |
4723 | break; | |
4724 | default: | |
4725 | dev_warn(&udev->dev, "%s: Can't get timeout for non-U1 or U2 state.\n", | |
4726 | __func__); | |
e25e62ae | 4727 | return USB3_LPM_DISABLED; |
3b3db026 SS |
4728 | } |
4729 | ||
4730 | if (sel <= max_sel_pel && pel <= max_sel_pel) | |
4731 | return USB3_LPM_DEVICE_INITIATED; | |
4732 | ||
4733 | if (sel > max_sel_pel) | |
4734 | dev_dbg(&udev->dev, "Device-initiated %s disabled " | |
4735 | "due to long SEL %llu ms\n", | |
4736 | state_name, sel); | |
4737 | else | |
4738 | dev_dbg(&udev->dev, "Device-initiated %s disabled " | |
03e64e96 | 4739 | "due to long PEL %llu ms\n", |
3b3db026 SS |
4740 | state_name, pel); |
4741 | return USB3_LPM_DISABLED; | |
4742 | } | |
4743 | ||
9502c46c | 4744 | /* The U1 timeout should be the maximum of the following values: |
e3567d2c SS |
4745 | * - For control endpoints, U1 system exit latency (SEL) * 3 |
4746 | * - For bulk endpoints, U1 SEL * 5 | |
4747 | * - For interrupt endpoints: | |
4748 | * - Notification EPs, U1 SEL * 3 | |
4749 | * - Periodic EPs, max(105% of bInterval, U1 SEL * 2) | |
4750 | * - For isochronous endpoints, max(105% of bInterval, U1 SEL * 2) | |
4751 | */ | |
9502c46c PA |
4752 | static unsigned long long xhci_calculate_intel_u1_timeout( |
4753 | struct usb_device *udev, | |
e3567d2c SS |
4754 | struct usb_endpoint_descriptor *desc) |
4755 | { | |
4756 | unsigned long long timeout_ns; | |
4757 | int ep_type; | |
4758 | int intr_type; | |
4759 | ||
4760 | ep_type = usb_endpoint_type(desc); | |
4761 | switch (ep_type) { | |
4762 | case USB_ENDPOINT_XFER_CONTROL: | |
4763 | timeout_ns = udev->u1_params.sel * 3; | |
4764 | break; | |
4765 | case USB_ENDPOINT_XFER_BULK: | |
4766 | timeout_ns = udev->u1_params.sel * 5; | |
4767 | break; | |
4768 | case USB_ENDPOINT_XFER_INT: | |
4769 | intr_type = usb_endpoint_interrupt_type(desc); | |
4770 | if (intr_type == USB_ENDPOINT_INTR_NOTIFICATION) { | |
4771 | timeout_ns = udev->u1_params.sel * 3; | |
4772 | break; | |
4773 | } | |
4774 | /* Otherwise the calculation is the same as isoc eps */ | |
df561f66 | 4775 | fallthrough; |
e3567d2c SS |
4776 | case USB_ENDPOINT_XFER_ISOC: |
4777 | timeout_ns = xhci_service_interval_to_ns(desc); | |
c88db160 | 4778 | timeout_ns = DIV_ROUND_UP_ULL(timeout_ns * 105, 100); |
e3567d2c SS |
4779 | if (timeout_ns < udev->u1_params.sel * 2) |
4780 | timeout_ns = udev->u1_params.sel * 2; | |
4781 | break; | |
4782 | default: | |
4783 | return 0; | |
4784 | } | |
4785 | ||
9502c46c PA |
4786 | return timeout_ns; |
4787 | } | |
4788 | ||
4789 | /* Returns the hub-encoded U1 timeout value. */ | |
4790 | static u16 xhci_calculate_u1_timeout(struct xhci_hcd *xhci, | |
4791 | struct usb_device *udev, | |
4792 | struct usb_endpoint_descriptor *desc) | |
4793 | { | |
4794 | unsigned long long timeout_ns; | |
4795 | ||
0472bf06 MN |
4796 | /* Prevent U1 if service interval is shorter than U1 exit latency */ |
4797 | if (usb_endpoint_xfer_int(desc) || usb_endpoint_xfer_isoc(desc)) { | |
2847c46c | 4798 | if (xhci_service_interval_to_ns(desc) <= udev->u1_params.mel) { |
0472bf06 MN |
4799 | dev_dbg(&udev->dev, "Disable U1, ESIT shorter than exit latency\n"); |
4800 | return USB3_LPM_DISABLED; | |
4801 | } | |
4802 | } | |
4803 | ||
2847c46c MN |
4804 | if (xhci->quirks & XHCI_INTEL_HOST) |
4805 | timeout_ns = xhci_calculate_intel_u1_timeout(udev, desc); | |
4806 | else | |
4807 | timeout_ns = udev->u1_params.sel; | |
4808 | ||
9502c46c PA |
4809 | /* The U1 timeout is encoded in 1us intervals. |
4810 | * Don't return a timeout of zero, because that's USB3_LPM_DISABLED. | |
4811 | */ | |
e3567d2c | 4812 | if (timeout_ns == USB3_LPM_DISABLED) |
9502c46c PA |
4813 | timeout_ns = 1; |
4814 | else | |
4815 | timeout_ns = DIV_ROUND_UP_ULL(timeout_ns, 1000); | |
e3567d2c SS |
4816 | |
4817 | /* If the necessary timeout value is bigger than what we can set in the | |
4818 | * USB 3.0 hub, we have to disable hub-initiated U1. | |
4819 | */ | |
4820 | if (timeout_ns <= USB3_LPM_U1_MAX_TIMEOUT) | |
4821 | return timeout_ns; | |
4822 | dev_dbg(&udev->dev, "Hub-initiated U1 disabled " | |
4823 | "due to long timeout %llu ms\n", timeout_ns); | |
4824 | return xhci_get_timeout_no_hub_lpm(udev, USB3_LPM_U1); | |
4825 | } | |
4826 | ||
9502c46c | 4827 | /* The U2 timeout should be the maximum of: |
e3567d2c SS |
4828 | * - 10 ms (to avoid the bandwidth impact on the scheduler) |
4829 | * - largest bInterval of any active periodic endpoint (to avoid going | |
4830 | * into lower power link states between intervals). | |
4831 | * - the U2 Exit Latency of the device | |
4832 | */ | |
9502c46c PA |
4833 | static unsigned long long xhci_calculate_intel_u2_timeout( |
4834 | struct usb_device *udev, | |
e3567d2c SS |
4835 | struct usb_endpoint_descriptor *desc) |
4836 | { | |
4837 | unsigned long long timeout_ns; | |
4838 | unsigned long long u2_del_ns; | |
4839 | ||
4840 | timeout_ns = 10 * 1000 * 1000; | |
4841 | ||
4842 | if ((usb_endpoint_xfer_int(desc) || usb_endpoint_xfer_isoc(desc)) && | |
4843 | (xhci_service_interval_to_ns(desc) > timeout_ns)) | |
4844 | timeout_ns = xhci_service_interval_to_ns(desc); | |
4845 | ||
966e7a85 | 4846 | u2_del_ns = le16_to_cpu(udev->bos->ss_cap->bU2DevExitLat) * 1000ULL; |
e3567d2c SS |
4847 | if (u2_del_ns > timeout_ns) |
4848 | timeout_ns = u2_del_ns; | |
4849 | ||
9502c46c PA |
4850 | return timeout_ns; |
4851 | } | |
4852 | ||
4853 | /* Returns the hub-encoded U2 timeout value. */ | |
4854 | static u16 xhci_calculate_u2_timeout(struct xhci_hcd *xhci, | |
4855 | struct usb_device *udev, | |
4856 | struct usb_endpoint_descriptor *desc) | |
4857 | { | |
4858 | unsigned long long timeout_ns; | |
4859 | ||
0472bf06 MN |
4860 | /* Prevent U2 if service interval is shorter than U2 exit latency */ |
4861 | if (usb_endpoint_xfer_int(desc) || usb_endpoint_xfer_isoc(desc)) { | |
2847c46c | 4862 | if (xhci_service_interval_to_ns(desc) <= udev->u2_params.mel) { |
0472bf06 MN |
4863 | dev_dbg(&udev->dev, "Disable U2, ESIT shorter than exit latency\n"); |
4864 | return USB3_LPM_DISABLED; | |
4865 | } | |
4866 | } | |
4867 | ||
2847c46c MN |
4868 | if (xhci->quirks & XHCI_INTEL_HOST) |
4869 | timeout_ns = xhci_calculate_intel_u2_timeout(udev, desc); | |
4870 | else | |
4871 | timeout_ns = udev->u2_params.sel; | |
4872 | ||
e3567d2c | 4873 | /* The U2 timeout is encoded in 256us intervals */ |
c88db160 | 4874 | timeout_ns = DIV_ROUND_UP_ULL(timeout_ns, 256 * 1000); |
e3567d2c SS |
4875 | /* If the necessary timeout value is bigger than what we can set in the |
4876 | * USB 3.0 hub, we have to disable hub-initiated U2. | |
4877 | */ | |
4878 | if (timeout_ns <= USB3_LPM_U2_MAX_TIMEOUT) | |
4879 | return timeout_ns; | |
4880 | dev_dbg(&udev->dev, "Hub-initiated U2 disabled " | |
4881 | "due to long timeout %llu ms\n", timeout_ns); | |
4882 | return xhci_get_timeout_no_hub_lpm(udev, USB3_LPM_U2); | |
4883 | } | |
4884 | ||
3b3db026 SS |
4885 | static u16 xhci_call_host_update_timeout_for_endpoint(struct xhci_hcd *xhci, |
4886 | struct usb_device *udev, | |
4887 | struct usb_endpoint_descriptor *desc, | |
4888 | enum usb3_link_state state, | |
4889 | u16 *timeout) | |
4890 | { | |
9502c46c PA |
4891 | if (state == USB3_LPM_U1) |
4892 | return xhci_calculate_u1_timeout(xhci, udev, desc); | |
4893 | else if (state == USB3_LPM_U2) | |
4894 | return xhci_calculate_u2_timeout(xhci, udev, desc); | |
e3567d2c | 4895 | |
3b3db026 SS |
4896 | return USB3_LPM_DISABLED; |
4897 | } | |
4898 | ||
4899 | static int xhci_update_timeout_for_endpoint(struct xhci_hcd *xhci, | |
4900 | struct usb_device *udev, | |
4901 | struct usb_endpoint_descriptor *desc, | |
4902 | enum usb3_link_state state, | |
4903 | u16 *timeout) | |
4904 | { | |
4905 | u16 alt_timeout; | |
4906 | ||
4907 | alt_timeout = xhci_call_host_update_timeout_for_endpoint(xhci, udev, | |
4908 | desc, state, timeout); | |
4909 | ||
d500c63f | 4910 | /* If we found we can't enable hub-initiated LPM, and |
3b3db026 | 4911 | * the U1 or U2 exit latency was too high to allow |
d500c63f JS |
4912 | * device-initiated LPM as well, then we will disable LPM |
4913 | * for this device, so stop searching any further. | |
3b3db026 | 4914 | */ |
d500c63f | 4915 | if (alt_timeout == USB3_LPM_DISABLED) { |
3b3db026 SS |
4916 | *timeout = alt_timeout; |
4917 | return -E2BIG; | |
4918 | } | |
4919 | if (alt_timeout > *timeout) | |
4920 | *timeout = alt_timeout; | |
4921 | return 0; | |
4922 | } | |
4923 | ||
4924 | static int xhci_update_timeout_for_interface(struct xhci_hcd *xhci, | |
4925 | struct usb_device *udev, | |
4926 | struct usb_host_interface *alt, | |
4927 | enum usb3_link_state state, | |
4928 | u16 *timeout) | |
4929 | { | |
4930 | int j; | |
4931 | ||
4932 | for (j = 0; j < alt->desc.bNumEndpoints; j++) { | |
4933 | if (xhci_update_timeout_for_endpoint(xhci, udev, | |
4934 | &alt->endpoint[j].desc, state, timeout)) | |
4935 | return -E2BIG; | |
3b3db026 SS |
4936 | } |
4937 | return 0; | |
4938 | } | |
4939 | ||
e3567d2c SS |
4940 | static int xhci_check_intel_tier_policy(struct usb_device *udev, |
4941 | enum usb3_link_state state) | |
4942 | { | |
4943 | struct usb_device *parent; | |
4944 | unsigned int num_hubs; | |
4945 | ||
e3567d2c SS |
4946 | /* Don't enable U1 if the device is on a 2nd tier hub or lower. */ |
4947 | for (parent = udev->parent, num_hubs = 0; parent->parent; | |
4948 | parent = parent->parent) | |
4949 | num_hubs++; | |
4950 | ||
4951 | if (num_hubs < 2) | |
4952 | return 0; | |
4953 | ||
424140d3 | 4954 | dev_dbg(&udev->dev, "Disabling U1/U2 link state for device" |
e3567d2c SS |
4955 | " below second-tier hub.\n"); |
4956 | dev_dbg(&udev->dev, "Plug device into first-tier hub " | |
4957 | "to decrease power consumption.\n"); | |
4958 | return -E2BIG; | |
4959 | } | |
4960 | ||
3b3db026 SS |
4961 | static int xhci_check_tier_policy(struct xhci_hcd *xhci, |
4962 | struct usb_device *udev, | |
4963 | enum usb3_link_state state) | |
4964 | { | |
e3567d2c SS |
4965 | if (xhci->quirks & XHCI_INTEL_HOST) |
4966 | return xhci_check_intel_tier_policy(udev, state); | |
9502c46c PA |
4967 | else |
4968 | return 0; | |
3b3db026 SS |
4969 | } |
4970 | ||
4971 | /* Returns the U1 or U2 timeout that should be enabled. | |
4972 | * If the tier check or timeout setting functions return with a non-zero exit | |
4973 | * code, that means the timeout value has been finalized and we shouldn't look | |
4974 | * at any more endpoints. | |
4975 | */ | |
4976 | static u16 xhci_calculate_lpm_timeout(struct usb_hcd *hcd, | |
4977 | struct usb_device *udev, enum usb3_link_state state) | |
4978 | { | |
4979 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
4980 | struct usb_host_config *config; | |
4981 | char *state_name; | |
4982 | int i; | |
4983 | u16 timeout = USB3_LPM_DISABLED; | |
4984 | ||
4985 | if (state == USB3_LPM_U1) | |
4986 | state_name = "U1"; | |
4987 | else if (state == USB3_LPM_U2) | |
4988 | state_name = "U2"; | |
4989 | else { | |
4990 | dev_warn(&udev->dev, "Can't enable unknown link state %i\n", | |
4991 | state); | |
4992 | return timeout; | |
4993 | } | |
4994 | ||
3b3db026 SS |
4995 | /* Gather some information about the currently installed configuration |
4996 | * and alternate interface settings. | |
4997 | */ | |
4998 | if (xhci_update_timeout_for_endpoint(xhci, udev, &udev->ep0.desc, | |
4999 | state, &timeout)) | |
5000 | return timeout; | |
5001 | ||
5002 | config = udev->actconfig; | |
5003 | if (!config) | |
5004 | return timeout; | |
5005 | ||
64ba419b | 5006 | for (i = 0; i < config->desc.bNumInterfaces; i++) { |
3b3db026 SS |
5007 | struct usb_driver *driver; |
5008 | struct usb_interface *intf = config->interface[i]; | |
5009 | ||
5010 | if (!intf) | |
5011 | continue; | |
5012 | ||
5013 | /* Check if any currently bound drivers want hub-initiated LPM | |
5014 | * disabled. | |
5015 | */ | |
5016 | if (intf->dev.driver) { | |
5017 | driver = to_usb_driver(intf->dev.driver); | |
5018 | if (driver && driver->disable_hub_initiated_lpm) { | |
cd9d9491 MN |
5019 | dev_dbg(&udev->dev, "Hub-initiated %s disabled at request of driver %s\n", |
5020 | state_name, driver->name); | |
5021 | timeout = xhci_get_timeout_no_hub_lpm(udev, | |
5022 | state); | |
5023 | if (timeout == USB3_LPM_DISABLED) | |
5024 | return timeout; | |
3b3db026 SS |
5025 | } |
5026 | } | |
5027 | ||
5028 | /* Not sure how this could happen... */ | |
5029 | if (!intf->cur_altsetting) | |
5030 | continue; | |
5031 | ||
5032 | if (xhci_update_timeout_for_interface(xhci, udev, | |
5033 | intf->cur_altsetting, | |
5034 | state, &timeout)) | |
5035 | return timeout; | |
5036 | } | |
5037 | return timeout; | |
5038 | } | |
5039 | ||
3b3db026 SS |
5040 | static int calculate_max_exit_latency(struct usb_device *udev, |
5041 | enum usb3_link_state state_changed, | |
5042 | u16 hub_encoded_timeout) | |
5043 | { | |
5044 | unsigned long long u1_mel_us = 0; | |
5045 | unsigned long long u2_mel_us = 0; | |
5046 | unsigned long long mel_us = 0; | |
5047 | bool disabling_u1; | |
5048 | bool disabling_u2; | |
5049 | bool enabling_u1; | |
5050 | bool enabling_u2; | |
5051 | ||
5052 | disabling_u1 = (state_changed == USB3_LPM_U1 && | |
5053 | hub_encoded_timeout == USB3_LPM_DISABLED); | |
5054 | disabling_u2 = (state_changed == USB3_LPM_U2 && | |
5055 | hub_encoded_timeout == USB3_LPM_DISABLED); | |
5056 | ||
5057 | enabling_u1 = (state_changed == USB3_LPM_U1 && | |
5058 | hub_encoded_timeout != USB3_LPM_DISABLED); | |
5059 | enabling_u2 = (state_changed == USB3_LPM_U2 && | |
5060 | hub_encoded_timeout != USB3_LPM_DISABLED); | |
5061 | ||
5062 | /* If U1 was already enabled and we're not disabling it, | |
5063 | * or we're going to enable U1, account for the U1 max exit latency. | |
5064 | */ | |
5065 | if ((udev->u1_params.timeout != USB3_LPM_DISABLED && !disabling_u1) || | |
5066 | enabling_u1) | |
5067 | u1_mel_us = DIV_ROUND_UP(udev->u1_params.mel, 1000); | |
5068 | if ((udev->u2_params.timeout != USB3_LPM_DISABLED && !disabling_u2) || | |
5069 | enabling_u2) | |
5070 | u2_mel_us = DIV_ROUND_UP(udev->u2_params.mel, 1000); | |
5071 | ||
f28fb27e CD |
5072 | mel_us = max(u1_mel_us, u2_mel_us); |
5073 | ||
3b3db026 SS |
5074 | /* xHCI host controller max exit latency field is only 16 bits wide. */ |
5075 | if (mel_us > MAX_EXIT) { | |
5076 | dev_warn(&udev->dev, "Link PM max exit latency of %lluus " | |
5077 | "is too big.\n", mel_us); | |
5078 | return -E2BIG; | |
5079 | } | |
5080 | return mel_us; | |
5081 | } | |
5082 | ||
5083 | /* Returns the USB3 hub-encoded value for the U1/U2 timeout. */ | |
3969384c | 5084 | static int xhci_enable_usb3_lpm_timeout(struct usb_hcd *hcd, |
3b3db026 SS |
5085 | struct usb_device *udev, enum usb3_link_state state) |
5086 | { | |
5087 | struct xhci_hcd *xhci; | |
0522b9a1 | 5088 | struct xhci_port *port; |
3b3db026 SS |
5089 | u16 hub_encoded_timeout; |
5090 | int mel; | |
5091 | int ret; | |
5092 | ||
5093 | xhci = hcd_to_xhci(hcd); | |
5094 | /* The LPM timeout values are pretty host-controller specific, so don't | |
5095 | * enable hub-initiated timeouts unless the vendor has provided | |
5096 | * information about their timeout algorithm. | |
5097 | */ | |
5098 | if (!xhci || !(xhci->quirks & XHCI_LPM_SUPPORT) || | |
5099 | !xhci->devs[udev->slot_id]) | |
5100 | return USB3_LPM_DISABLED; | |
5101 | ||
424140d3 MN |
5102 | if (xhci_check_tier_policy(xhci, udev, state) < 0) |
5103 | return USB3_LPM_DISABLED; | |
5104 | ||
0522b9a1 MN |
5105 | /* If connected to root port then check port can handle lpm */ |
5106 | if (udev->parent && !udev->parent->parent) { | |
5107 | port = xhci->usb3_rhub.ports[udev->portnum - 1]; | |
5108 | if (port->lpm_incapable) | |
5109 | return USB3_LPM_DISABLED; | |
5110 | } | |
5111 | ||
3b3db026 SS |
5112 | hub_encoded_timeout = xhci_calculate_lpm_timeout(hcd, udev, state); |
5113 | mel = calculate_max_exit_latency(udev, state, hub_encoded_timeout); | |
5114 | if (mel < 0) { | |
5115 | /* Max Exit Latency is too big, disable LPM. */ | |
5116 | hub_encoded_timeout = USB3_LPM_DISABLED; | |
5117 | mel = 0; | |
5118 | } | |
5119 | ||
5120 | ret = xhci_change_max_exit_latency(xhci, udev, mel); | |
5121 | if (ret) | |
5122 | return ret; | |
5123 | return hub_encoded_timeout; | |
5124 | } | |
5125 | ||
3969384c | 5126 | static int xhci_disable_usb3_lpm_timeout(struct usb_hcd *hcd, |
3b3db026 SS |
5127 | struct usb_device *udev, enum usb3_link_state state) |
5128 | { | |
5129 | struct xhci_hcd *xhci; | |
5130 | u16 mel; | |
3b3db026 SS |
5131 | |
5132 | xhci = hcd_to_xhci(hcd); | |
5133 | if (!xhci || !(xhci->quirks & XHCI_LPM_SUPPORT) || | |
5134 | !xhci->devs[udev->slot_id]) | |
5135 | return 0; | |
5136 | ||
5137 | mel = calculate_max_exit_latency(udev, state, USB3_LPM_DISABLED); | |
f1cda54c | 5138 | return xhci_change_max_exit_latency(xhci, udev, mel); |
3b3db026 | 5139 | } |
b01bcbf7 | 5140 | #else /* CONFIG_PM */ |
9574323c | 5141 | |
3969384c | 5142 | static int xhci_set_usb2_hardware_lpm(struct usb_hcd *hcd, |
ceb6c9c8 RW |
5143 | struct usb_device *udev, int enable) |
5144 | { | |
5145 | return 0; | |
5146 | } | |
5147 | ||
3969384c | 5148 | static int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev) |
ceb6c9c8 RW |
5149 | { |
5150 | return 0; | |
5151 | } | |
5152 | ||
3969384c | 5153 | static int xhci_enable_usb3_lpm_timeout(struct usb_hcd *hcd, |
b01bcbf7 | 5154 | struct usb_device *udev, enum usb3_link_state state) |
65580b43 | 5155 | { |
b01bcbf7 | 5156 | return USB3_LPM_DISABLED; |
65580b43 AX |
5157 | } |
5158 | ||
3969384c | 5159 | static int xhci_disable_usb3_lpm_timeout(struct usb_hcd *hcd, |
b01bcbf7 | 5160 | struct usb_device *udev, enum usb3_link_state state) |
9574323c AX |
5161 | { |
5162 | return 0; | |
5163 | } | |
b01bcbf7 | 5164 | #endif /* CONFIG_PM */ |
9574323c | 5165 | |
b01bcbf7 | 5166 | /*-------------------------------------------------------------------------*/ |
9574323c | 5167 | |
ac1c1b7f SS |
5168 | /* Once a hub descriptor is fetched for a device, we need to update the xHC's |
5169 | * internal data structures for the device. | |
5170 | */ | |
23a3b8d5 | 5171 | int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev, |
ac1c1b7f SS |
5172 | struct usb_tt *tt, gfp_t mem_flags) |
5173 | { | |
5174 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
5175 | struct xhci_virt_device *vdev; | |
5176 | struct xhci_command *config_cmd; | |
5177 | struct xhci_input_control_ctx *ctrl_ctx; | |
5178 | struct xhci_slot_ctx *slot_ctx; | |
5179 | unsigned long flags; | |
5180 | unsigned think_time; | |
5181 | int ret; | |
5182 | ||
5183 | /* Ignore root hubs */ | |
5184 | if (!hdev->parent) | |
5185 | return 0; | |
5186 | ||
5187 | vdev = xhci->devs[hdev->slot_id]; | |
5188 | if (!vdev) { | |
5189 | xhci_warn(xhci, "Cannot update hub desc for unknown device.\n"); | |
5190 | return -EINVAL; | |
5191 | } | |
74e0b564 | 5192 | |
14d49b7a | 5193 | config_cmd = xhci_alloc_command_with_ctx(xhci, true, mem_flags); |
74e0b564 | 5194 | if (!config_cmd) |
ac1c1b7f | 5195 | return -ENOMEM; |
74e0b564 | 5196 | |
4daf9df5 | 5197 | ctrl_ctx = xhci_get_input_control_ctx(config_cmd->in_ctx); |
92f8e767 SS |
5198 | if (!ctrl_ctx) { |
5199 | xhci_warn(xhci, "%s: Could not get input context, bad type.\n", | |
5200 | __func__); | |
5201 | xhci_free_command(xhci, config_cmd); | |
5202 | return -ENOMEM; | |
5203 | } | |
ac1c1b7f SS |
5204 | |
5205 | spin_lock_irqsave(&xhci->lock, flags); | |
839c817c SS |
5206 | if (hdev->speed == USB_SPEED_HIGH && |
5207 | xhci_alloc_tt_info(xhci, vdev, hdev, tt, GFP_ATOMIC)) { | |
5208 | xhci_dbg(xhci, "Could not allocate xHCI TT structure.\n"); | |
5209 | xhci_free_command(xhci, config_cmd); | |
5210 | spin_unlock_irqrestore(&xhci->lock, flags); | |
5211 | return -ENOMEM; | |
5212 | } | |
5213 | ||
ac1c1b7f | 5214 | xhci_slot_copy(xhci, config_cmd->in_ctx, vdev->out_ctx); |
28ccd296 | 5215 | ctrl_ctx->add_flags |= cpu_to_le32(SLOT_FLAG); |
ac1c1b7f | 5216 | slot_ctx = xhci_get_slot_ctx(xhci, config_cmd->in_ctx); |
28ccd296 | 5217 | slot_ctx->dev_info |= cpu_to_le32(DEV_HUB); |
096b110a CY |
5218 | /* |
5219 | * refer to section 6.2.2: MTT should be 0 for full speed hub, | |
5220 | * but it may be already set to 1 when setup an xHCI virtual | |
5221 | * device, so clear it anyway. | |
5222 | */ | |
ac1c1b7f | 5223 | if (tt->multi) |
28ccd296 | 5224 | slot_ctx->dev_info |= cpu_to_le32(DEV_MTT); |
096b110a CY |
5225 | else if (hdev->speed == USB_SPEED_FULL) |
5226 | slot_ctx->dev_info &= cpu_to_le32(~DEV_MTT); | |
5227 | ||
ac1c1b7f SS |
5228 | if (xhci->hci_version > 0x95) { |
5229 | xhci_dbg(xhci, "xHCI version %x needs hub " | |
5230 | "TT think time and number of ports\n", | |
5231 | (unsigned int) xhci->hci_version); | |
28ccd296 | 5232 | slot_ctx->dev_info2 |= cpu_to_le32(XHCI_MAX_PORTS(hdev->maxchild)); |
ac1c1b7f SS |
5233 | /* Set TT think time - convert from ns to FS bit times. |
5234 | * 0 = 8 FS bit times, 1 = 16 FS bit times, | |
5235 | * 2 = 24 FS bit times, 3 = 32 FS bit times. | |
700b4173 AX |
5236 | * |
5237 | * xHCI 1.0: this field shall be 0 if the device is not a | |
5238 | * High-spped hub. | |
ac1c1b7f SS |
5239 | */ |
5240 | think_time = tt->think_time; | |
5241 | if (think_time != 0) | |
5242 | think_time = (think_time / 666) - 1; | |
700b4173 AX |
5243 | if (xhci->hci_version < 0x100 || hdev->speed == USB_SPEED_HIGH) |
5244 | slot_ctx->tt_info |= | |
5245 | cpu_to_le32(TT_THINK_TIME(think_time)); | |
ac1c1b7f SS |
5246 | } else { |
5247 | xhci_dbg(xhci, "xHCI version %x doesn't need hub " | |
5248 | "TT think time or number of ports\n", | |
5249 | (unsigned int) xhci->hci_version); | |
5250 | } | |
5251 | slot_ctx->dev_state = 0; | |
5252 | spin_unlock_irqrestore(&xhci->lock, flags); | |
5253 | ||
5254 | xhci_dbg(xhci, "Set up %s for hub device.\n", | |
5255 | (xhci->hci_version > 0x95) ? | |
5256 | "configure endpoint" : "evaluate context"); | |
ac1c1b7f SS |
5257 | |
5258 | /* Issue and wait for the configure endpoint or | |
5259 | * evaluate context command. | |
5260 | */ | |
5261 | if (xhci->hci_version > 0x95) | |
5262 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, | |
5263 | false, false); | |
5264 | else | |
5265 | ret = xhci_configure_endpoint(xhci, hdev, config_cmd, | |
5266 | true, false); | |
5267 | ||
ac1c1b7f SS |
5268 | xhci_free_command(xhci, config_cmd); |
5269 | return ret; | |
5270 | } | |
23a3b8d5 | 5271 | EXPORT_SYMBOL_GPL(xhci_update_hub_device); |
ac1c1b7f | 5272 | |
3969384c | 5273 | static int xhci_get_frame(struct usb_hcd *hcd) |
66d4eadd SS |
5274 | { |
5275 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
5276 | /* EHCI mods by the periodic size. Why? */ | |
b0ba9720 | 5277 | return readl(&xhci->run_regs->microframe_index) >> 3; |
66d4eadd SS |
5278 | } |
5279 | ||
57f23cd0 HK |
5280 | static void xhci_hcd_init_usb2_data(struct xhci_hcd *xhci, struct usb_hcd *hcd) |
5281 | { | |
5282 | xhci->usb2_rhub.hcd = hcd; | |
5283 | hcd->speed = HCD_USB2; | |
5284 | hcd->self.root_hub->speed = USB_SPEED_HIGH; | |
5285 | /* | |
5286 | * USB 2.0 roothub under xHCI has an integrated TT, | |
5287 | * (rate matching hub) as opposed to having an OHCI/UHCI | |
5288 | * companion controller. | |
5289 | */ | |
5290 | hcd->has_tt = 1; | |
5291 | } | |
5292 | ||
5293 | static void xhci_hcd_init_usb3_data(struct xhci_hcd *xhci, struct usb_hcd *hcd) | |
5294 | { | |
5295 | unsigned int minor_rev; | |
5296 | ||
5297 | /* | |
5298 | * Early xHCI 1.1 spec did not mention USB 3.1 capable hosts | |
5299 | * should return 0x31 for sbrn, or that the minor revision | |
5300 | * is a two digit BCD containig minor and sub-minor numbers. | |
5301 | * This was later clarified in xHCI 1.2. | |
5302 | * | |
5303 | * Some USB 3.1 capable hosts therefore have sbrn 0x30, and | |
5304 | * minor revision set to 0x1 instead of 0x10. | |
5305 | */ | |
5306 | if (xhci->usb3_rhub.min_rev == 0x1) | |
5307 | minor_rev = 1; | |
5308 | else | |
5309 | minor_rev = xhci->usb3_rhub.min_rev / 0x10; | |
5310 | ||
5311 | switch (minor_rev) { | |
5312 | case 2: | |
5313 | hcd->speed = HCD_USB32; | |
5314 | hcd->self.root_hub->speed = USB_SPEED_SUPER_PLUS; | |
5315 | hcd->self.root_hub->rx_lanes = 2; | |
5316 | hcd->self.root_hub->tx_lanes = 2; | |
5317 | hcd->self.root_hub->ssp_rate = USB_SSP_GEN_2x2; | |
5318 | break; | |
5319 | case 1: | |
5320 | hcd->speed = HCD_USB31; | |
5321 | hcd->self.root_hub->speed = USB_SPEED_SUPER_PLUS; | |
5322 | hcd->self.root_hub->ssp_rate = USB_SSP_GEN_2x1; | |
5323 | break; | |
5324 | } | |
5325 | xhci_info(xhci, "Host supports USB 3.%x %sSuperSpeed\n", | |
5326 | minor_rev, minor_rev ? "Enhanced " : ""); | |
5327 | ||
5328 | xhci->usb3_rhub.hcd = hcd; | |
5329 | } | |
5330 | ||
552e0c4f SAS |
5331 | int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) |
5332 | { | |
5333 | struct xhci_hcd *xhci; | |
4c39d4b9 AB |
5334 | /* |
5335 | * TODO: Check with DWC3 clients for sysdev according to | |
5336 | * quirks | |
5337 | */ | |
5338 | struct device *dev = hcd->self.sysdev; | |
552e0c4f | 5339 | int retval; |
552e0c4f | 5340 | |
1386ff75 SS |
5341 | /* Accept arbitrarily long scatter-gather lists */ |
5342 | hcd->self.sg_tablesize = ~0; | |
fc76051c | 5343 | |
e2ed5114 MN |
5344 | /* support to build packet from discontinuous buffers */ |
5345 | hcd->self.no_sg_constraint = 1; | |
5346 | ||
19181bc5 HG |
5347 | /* XHCI controllers don't stop the ep queue on short packets :| */ |
5348 | hcd->self.no_stop_on_short = 1; | |
552e0c4f | 5349 | |
b50107bb MN |
5350 | xhci = hcd_to_xhci(hcd); |
5351 | ||
873f3236 | 5352 | if (!usb_hcd_is_primary_hcd(hcd)) { |
57f23cd0 | 5353 | xhci_hcd_init_usb3_data(xhci, hcd); |
552e0c4f SAS |
5354 | return 0; |
5355 | } | |
5356 | ||
a00918d0 | 5357 | mutex_init(&xhci->mutex); |
57f23cd0 | 5358 | xhci->main_hcd = hcd; |
552e0c4f SAS |
5359 | xhci->cap_regs = hcd->regs; |
5360 | xhci->op_regs = hcd->regs + | |
b0ba9720 | 5361 | HC_LENGTH(readl(&xhci->cap_regs->hc_capbase)); |
552e0c4f | 5362 | xhci->run_regs = hcd->regs + |
b0ba9720 | 5363 | (readl(&xhci->cap_regs->run_regs_off) & RTSOFF_MASK); |
552e0c4f | 5364 | /* Cache read-only capability registers */ |
b0ba9720 XR |
5365 | xhci->hcs_params1 = readl(&xhci->cap_regs->hcs_params1); |
5366 | xhci->hcs_params2 = readl(&xhci->cap_regs->hcs_params2); | |
5367 | xhci->hcs_params3 = readl(&xhci->cap_regs->hcs_params3); | |
c63d5757 | 5368 | xhci->hci_version = HC_VERSION(readl(&xhci->cap_regs->hc_capbase)); |
b0ba9720 | 5369 | xhci->hcc_params = readl(&xhci->cap_regs->hcc_params); |
04abb6de LB |
5370 | if (xhci->hci_version > 0x100) |
5371 | xhci->hcc_params2 = readl(&xhci->cap_regs->hcc_params2); | |
552e0c4f | 5372 | |
b17a57f8 MN |
5373 | /* xhci-plat or xhci-pci might have set max_interrupters already */ |
5374 | if ((!xhci->max_interrupters) || | |
5375 | xhci->max_interrupters > HCS_MAX_INTRS(xhci->hcs_params1)) | |
5376 | xhci->max_interrupters = HCS_MAX_INTRS(xhci->hcs_params1); | |
5377 | ||
757de492 | 5378 | xhci->quirks |= quirks; |
4e6a1ee7 | 5379 | |
552e0c4f SAS |
5380 | get_quirks(dev, xhci); |
5381 | ||
07f3cb7c GC |
5382 | /* In xhci controllers which follow xhci 1.0 spec gives a spurious |
5383 | * success event after a short transfer. This quirk will ignore such | |
5384 | * spurious event. | |
5385 | */ | |
5386 | if (xhci->hci_version > 0x96) | |
5387 | xhci->quirks |= XHCI_SPURIOUS_SUCCESS; | |
5388 | ||
552e0c4f SAS |
5389 | /* Make sure the HC is halted. */ |
5390 | retval = xhci_halt(xhci); | |
5391 | if (retval) | |
cd33a321 | 5392 | return retval; |
552e0c4f | 5393 | |
12de0a35 MZ |
5394 | xhci_zero_64b_regs(xhci); |
5395 | ||
552e0c4f SAS |
5396 | xhci_dbg(xhci, "Resetting HCD\n"); |
5397 | /* Reset the internal HC memory state and registers. */ | |
14073ce9 | 5398 | retval = xhci_reset(xhci, XHCI_RESET_LONG_USEC); |
552e0c4f | 5399 | if (retval) |
cd33a321 | 5400 | return retval; |
552e0c4f SAS |
5401 | xhci_dbg(xhci, "Reset complete\n"); |
5402 | ||
0a380be8 YS |
5403 | /* |
5404 | * On some xHCI controllers (e.g. R-Car SoCs), the AC64 bit (bit 0) | |
5405 | * of HCCPARAMS1 is set to 1. However, the xHCs don't support 64-bit | |
5406 | * address memory pointers actually. So, this driver clears the AC64 | |
5407 | * bit of xhci->hcc_params to call dma_set_coherent_mask(dev, | |
5408 | * DMA_BIT_MASK(32)) in this xhci_gen_setup(). | |
5409 | */ | |
5410 | if (xhci->quirks & XHCI_NO_64BIT_SUPPORT) | |
5411 | xhci->hcc_params &= ~BIT(0); | |
5412 | ||
c10cf118 XR |
5413 | /* Set dma_mask and coherent_dma_mask to 64-bits, |
5414 | * if xHC supports 64-bit addressing */ | |
5415 | if (HCC_64BIT_ADDR(xhci->hcc_params) && | |
5416 | !dma_set_mask(dev, DMA_BIT_MASK(64))) { | |
552e0c4f | 5417 | xhci_dbg(xhci, "Enabling 64-bit DMA addresses.\n"); |
c10cf118 | 5418 | dma_set_coherent_mask(dev, DMA_BIT_MASK(64)); |
fda182d8 DD |
5419 | } else { |
5420 | /* | |
5421 | * This is to avoid error in cases where a 32-bit USB | |
5422 | * controller is used on a 64-bit capable system. | |
5423 | */ | |
5424 | retval = dma_set_mask(dev, DMA_BIT_MASK(32)); | |
5425 | if (retval) | |
5426 | return retval; | |
5427 | xhci_dbg(xhci, "Enabling 32-bit DMA addresses.\n"); | |
5428 | dma_set_coherent_mask(dev, DMA_BIT_MASK(32)); | |
552e0c4f SAS |
5429 | } |
5430 | ||
5431 | xhci_dbg(xhci, "Calling HCD init\n"); | |
5432 | /* Initialize HCD and host controller data structures. */ | |
5433 | retval = xhci_init(hcd); | |
5434 | if (retval) | |
cd33a321 | 5435 | return retval; |
552e0c4f | 5436 | xhci_dbg(xhci, "Called HCD init\n"); |
99705092 | 5437 | |
873f3236 HK |
5438 | if (xhci_hcd_is_usb3(hcd)) |
5439 | xhci_hcd_init_usb3_data(xhci, hcd); | |
5440 | else | |
5441 | xhci_hcd_init_usb2_data(xhci, hcd); | |
5442 | ||
36b68579 | 5443 | xhci_info(xhci, "hcc params 0x%08x hci version 0x%x quirks 0x%016llx\n", |
99705092 HG |
5444 | xhci->hcc_params, xhci->hci_version, xhci->quirks); |
5445 | ||
552e0c4f | 5446 | return 0; |
552e0c4f | 5447 | } |
436e8c7d | 5448 | EXPORT_SYMBOL_GPL(xhci_gen_setup); |
552e0c4f | 5449 | |
ef513be0 JL |
5450 | static void xhci_clear_tt_buffer_complete(struct usb_hcd *hcd, |
5451 | struct usb_host_endpoint *ep) | |
5452 | { | |
5453 | struct xhci_hcd *xhci; | |
5454 | struct usb_device *udev; | |
5455 | unsigned int slot_id; | |
5456 | unsigned int ep_index; | |
5457 | unsigned long flags; | |
5458 | ||
5459 | xhci = hcd_to_xhci(hcd); | |
18b74067 MN |
5460 | |
5461 | spin_lock_irqsave(&xhci->lock, flags); | |
ef513be0 JL |
5462 | udev = (struct usb_device *)ep->hcpriv; |
5463 | slot_id = udev->slot_id; | |
5464 | ep_index = xhci_get_endpoint_index(&ep->desc); | |
5465 | ||
ef513be0 JL |
5466 | xhci->devs[slot_id]->eps[ep_index].ep_state &= ~EP_CLEARING_TT; |
5467 | xhci_ring_doorbell_for_active_rings(xhci, slot_id, ep_index); | |
5468 | spin_unlock_irqrestore(&xhci->lock, flags); | |
5469 | } | |
5470 | ||
1885d9a3 AB |
5471 | static const struct hc_driver xhci_hc_driver = { |
5472 | .description = "xhci-hcd", | |
5473 | .product_desc = "xHCI Host Controller", | |
32479d4b | 5474 | .hcd_priv_size = sizeof(struct xhci_hcd), |
1885d9a3 AB |
5475 | |
5476 | /* | |
5477 | * generic hardware linkage | |
5478 | */ | |
5479 | .irq = xhci_irq, | |
36dc0165 SK |
5480 | .flags = HCD_MEMORY | HCD_DMA | HCD_USB3 | HCD_SHARED | |
5481 | HCD_BH, | |
1885d9a3 AB |
5482 | |
5483 | /* | |
5484 | * basic lifecycle operations | |
5485 | */ | |
5486 | .reset = NULL, /* set in xhci_init_driver() */ | |
5487 | .start = xhci_run, | |
5488 | .stop = xhci_stop, | |
5489 | .shutdown = xhci_shutdown, | |
5490 | ||
5491 | /* | |
5492 | * managing i/o requests and associated device resources | |
5493 | */ | |
33e39350 | 5494 | .map_urb_for_dma = xhci_map_urb_for_dma, |
2017a1e5 | 5495 | .unmap_urb_for_dma = xhci_unmap_urb_for_dma, |
1885d9a3 AB |
5496 | .urb_enqueue = xhci_urb_enqueue, |
5497 | .urb_dequeue = xhci_urb_dequeue, | |
5498 | .alloc_dev = xhci_alloc_dev, | |
5499 | .free_dev = xhci_free_dev, | |
5500 | .alloc_streams = xhci_alloc_streams, | |
5501 | .free_streams = xhci_free_streams, | |
5502 | .add_endpoint = xhci_add_endpoint, | |
5503 | .drop_endpoint = xhci_drop_endpoint, | |
18b74067 | 5504 | .endpoint_disable = xhci_endpoint_disable, |
1885d9a3 AB |
5505 | .endpoint_reset = xhci_endpoint_reset, |
5506 | .check_bandwidth = xhci_check_bandwidth, | |
5507 | .reset_bandwidth = xhci_reset_bandwidth, | |
5508 | .address_device = xhci_address_device, | |
5509 | .enable_device = xhci_enable_device, | |
5510 | .update_hub_device = xhci_update_hub_device, | |
5511 | .reset_device = xhci_discover_or_reset_device, | |
5512 | ||
5513 | /* | |
5514 | * scheduling support | |
5515 | */ | |
5516 | .get_frame_number = xhci_get_frame, | |
5517 | ||
5518 | /* | |
5519 | * root hub support | |
5520 | */ | |
5521 | .hub_control = xhci_hub_control, | |
5522 | .hub_status_data = xhci_hub_status_data, | |
5523 | .bus_suspend = xhci_bus_suspend, | |
5524 | .bus_resume = xhci_bus_resume, | |
8f9cc83c | 5525 | .get_resuming_ports = xhci_get_resuming_ports, |
1885d9a3 AB |
5526 | |
5527 | /* | |
5528 | * call back when device connected and addressed | |
5529 | */ | |
5530 | .update_device = xhci_update_device, | |
5531 | .set_usb2_hw_lpm = xhci_set_usb2_hardware_lpm, | |
5532 | .enable_usb3_lpm_timeout = xhci_enable_usb3_lpm_timeout, | |
5533 | .disable_usb3_lpm_timeout = xhci_disable_usb3_lpm_timeout, | |
5534 | .find_raw_port_number = xhci_find_raw_port_number, | |
ef513be0 | 5535 | .clear_tt_buffer_complete = xhci_clear_tt_buffer_complete, |
1885d9a3 AB |
5536 | }; |
5537 | ||
cd33a321 RQ |
5538 | void xhci_init_driver(struct hc_driver *drv, |
5539 | const struct xhci_driver_overrides *over) | |
1885d9a3 | 5540 | { |
cd33a321 RQ |
5541 | BUG_ON(!over); |
5542 | ||
5543 | /* Copy the generic table to drv then apply the overrides */ | |
1885d9a3 | 5544 | *drv = xhci_hc_driver; |
cd33a321 RQ |
5545 | |
5546 | if (over) { | |
5547 | drv->hcd_priv_size += over->extra_priv_size; | |
5548 | if (over->reset) | |
5549 | drv->reset = over->reset; | |
5550 | if (over->start) | |
5551 | drv->start = over->start; | |
14295a15 CY |
5552 | if (over->add_endpoint) |
5553 | drv->add_endpoint = over->add_endpoint; | |
5554 | if (over->drop_endpoint) | |
5555 | drv->drop_endpoint = over->drop_endpoint; | |
1d69f9d9 IJ |
5556 | if (over->check_bandwidth) |
5557 | drv->check_bandwidth = over->check_bandwidth; | |
5558 | if (over->reset_bandwidth) | |
5559 | drv->reset_bandwidth = over->reset_bandwidth; | |
23a3b8d5 MN |
5560 | if (over->update_hub_device) |
5561 | drv->update_hub_device = over->update_hub_device; | |
592338dd JL |
5562 | if (over->hub_control) |
5563 | drv->hub_control = over->hub_control; | |
cd33a321 | 5564 | } |
1885d9a3 AB |
5565 | } |
5566 | EXPORT_SYMBOL_GPL(xhci_init_driver); | |
5567 | ||
66d4eadd SS |
5568 | MODULE_DESCRIPTION(DRIVER_DESC); |
5569 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
5570 | MODULE_LICENSE("GPL"); | |
5571 | ||
5572 | static int __init xhci_hcd_init(void) | |
5573 | { | |
98441973 SS |
5574 | /* |
5575 | * Check the compiler generated sizes of structures that must be laid | |
5576 | * out in specific ways for hardware access. | |
5577 | */ | |
5578 | BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*32/8); | |
5579 | BUILD_BUG_ON(sizeof(struct xhci_slot_ctx) != 8*32/8); | |
5580 | BUILD_BUG_ON(sizeof(struct xhci_ep_ctx) != 8*32/8); | |
5581 | /* xhci_device_control has eight fields, and also | |
5582 | * embeds one xhci_slot_ctx and 31 xhci_ep_ctx | |
5583 | */ | |
98441973 SS |
5584 | BUILD_BUG_ON(sizeof(struct xhci_stream_ctx) != 4*32/8); |
5585 | BUILD_BUG_ON(sizeof(union xhci_trb) != 4*32/8); | |
5586 | BUILD_BUG_ON(sizeof(struct xhci_erst_entry) != 4*32/8); | |
04abb6de | 5587 | BUILD_BUG_ON(sizeof(struct xhci_cap_regs) != 8*32/8); |
98441973 SS |
5588 | BUILD_BUG_ON(sizeof(struct xhci_intr_reg) != 8*32/8); |
5589 | /* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */ | |
5590 | BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8); | |
1eaf35e4 ON |
5591 | |
5592 | if (usb_disabled()) | |
5593 | return -ENODEV; | |
5594 | ||
02b6fdc2 | 5595 | xhci_debugfs_create_root(); |
6aec5000 | 5596 | xhci_dbc_init(); |
02b6fdc2 | 5597 | |
66d4eadd SS |
5598 | return 0; |
5599 | } | |
b04c846c AD |
5600 | |
5601 | /* | |
5602 | * If an init function is provided, an exit function must also be provided | |
5603 | * to allow module unload. | |
5604 | */ | |
02b6fdc2 LB |
5605 | static void __exit xhci_hcd_fini(void) |
5606 | { | |
5607 | xhci_debugfs_remove_root(); | |
6aec5000 | 5608 | xhci_dbc_exit(); |
02b6fdc2 | 5609 | } |
b04c846c | 5610 | |
66d4eadd | 5611 | module_init(xhci_hcd_init); |
b04c846c | 5612 | module_exit(xhci_hcd_fini); |