Commit | Line | Data |
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04679b34 TH |
1 | /* |
2 | * Copyright (C) 2003-2008 Takahiro Hirofuchi | |
3 | * | |
4 | * This is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
17 | * USA. | |
18 | */ | |
19 | ||
7aaacb43 | 20 | #include <linux/init.h> |
3d0a2a22 | 21 | #include <linux/file.h> |
7aaacb43 | 22 | #include <linux/kernel.h> |
9720b4bc | 23 | #include <linux/kthread.h> |
7aaacb43 | 24 | #include <linux/module.h> |
25 | #include <linux/platform_device.h> | |
26 | #include <linux/slab.h> | |
04679b34 TH |
27 | |
28 | #include "usbip_common.h" | |
29 | #include "vhci.h" | |
30 | ||
04679b34 | 31 | #define DRIVER_AUTHOR "Takahiro Hirofuchi" |
64e62426 | 32 | #define DRIVER_DESC "USB/IP 'Virtual' Host Controller (VHCI) Driver" |
04679b34 TH |
33 | |
34 | /* | |
35 | * TODO | |
36 | * - update root hub emulation | |
37 | * - move the emulation code to userland ? | |
38 | * porting to other operating systems | |
39 | * minimize kernel code | |
40 | * - add suspend/resume code | |
41 | * - clean up everything | |
42 | */ | |
43 | ||
04679b34 TH |
44 | /* See usb gadget dummy hcd */ |
45 | ||
04679b34 TH |
46 | static int vhci_hub_status(struct usb_hcd *hcd, char *buff); |
47 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
071d1d47 | 48 | u16 wIndex, char *buff, u16 wLength); |
04679b34 | 49 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
071d1d47 | 50 | gfp_t mem_flags); |
04679b34 TH |
51 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); |
52 | static int vhci_start(struct usb_hcd *vhci_hcd); | |
53 | static void vhci_stop(struct usb_hcd *hcd); | |
54 | static int vhci_get_frame_number(struct usb_hcd *hcd); | |
55 | ||
56 | static const char driver_name[] = "vhci_hcd"; | |
f5e08ca7 | 57 | static const char driver_desc[] = "USB/IP Virtual Host Controller"; |
04679b34 TH |
58 | |
59 | struct vhci_hcd *the_controller; | |
60 | ||
071d1d47 | 61 | static const char * const bit_desc[] = { |
04679b34 TH |
62 | "CONNECTION", /*0*/ |
63 | "ENABLE", /*1*/ | |
64 | "SUSPEND", /*2*/ | |
65 | "OVER_CURRENT", /*3*/ | |
66 | "RESET", /*4*/ | |
071d1d47 | 67 | "R5", /*5*/ |
68 | "R6", /*6*/ | |
69 | "R7", /*7*/ | |
04679b34 TH |
70 | "POWER", /*8*/ |
71 | "LOWSPEED", /*9*/ | |
72 | "HIGHSPEED", /*10*/ | |
73 | "PORT_TEST", /*11*/ | |
74 | "INDICATOR", /*12*/ | |
071d1d47 | 75 | "R13", /*13*/ |
76 | "R14", /*14*/ | |
77 | "R15", /*15*/ | |
04679b34 TH |
78 | "C_CONNECTION", /*16*/ |
79 | "C_ENABLE", /*17*/ | |
80 | "C_SUSPEND", /*18*/ | |
81 | "C_OVER_CURRENT", /*19*/ | |
82 | "C_RESET", /*20*/ | |
071d1d47 | 83 | "R21", /*21*/ |
84 | "R22", /*22*/ | |
85 | "R23", /*23*/ | |
86 | "R24", /*24*/ | |
87 | "R25", /*25*/ | |
88 | "R26", /*26*/ | |
89 | "R27", /*27*/ | |
90 | "R28", /*28*/ | |
91 | "R29", /*29*/ | |
92 | "R30", /*30*/ | |
93 | "R31", /*31*/ | |
04679b34 TH |
94 | }; |
95 | ||
4a3ca2be | 96 | static void dump_port_status_diff(u32 prev_status, u32 new_status) |
04679b34 TH |
97 | { |
98 | int i = 0; | |
4a3ca2be MN |
99 | u32 bit = 1; |
100 | ||
101 | pr_debug("status prev -> new: %08x -> %08x\n", prev_status, new_status); | |
102 | while (bit) { | |
103 | u32 prev = prev_status & bit; | |
104 | u32 new = new_status & bit; | |
105 | char change; | |
106 | ||
107 | if (!prev && new) | |
108 | change = '+'; | |
109 | else if (prev && !new) | |
110 | change = '-'; | |
111 | else | |
112 | change = ' '; | |
113 | ||
114 | if (prev || new) | |
115 | pr_debug(" %c%s\n", change, bit_desc[i]); | |
116 | bit <<= 1; | |
117 | i++; | |
04679b34 | 118 | } |
1a4b6f66 | 119 | pr_debug("\n"); |
04679b34 TH |
120 | } |
121 | ||
04679b34 TH |
122 | void rh_port_connect(int rhport, enum usb_device_speed speed) |
123 | { | |
21619792 AG |
124 | unsigned long flags; |
125 | ||
b8868e45 | 126 | usbip_dbg_vhci_rh("rh_port_connect %d\n", rhport); |
04679b34 | 127 | |
21619792 | 128 | spin_lock_irqsave(&the_controller->lock, flags); |
04679b34 TH |
129 | |
130 | the_controller->port_status[rhport] |= USB_PORT_STAT_CONNECTION | |
131 | | (1 << USB_PORT_FEAT_C_CONNECTION); | |
132 | ||
133 | switch (speed) { | |
134 | case USB_SPEED_HIGH: | |
135 | the_controller->port_status[rhport] |= USB_PORT_STAT_HIGH_SPEED; | |
136 | break; | |
137 | case USB_SPEED_LOW: | |
138 | the_controller->port_status[rhport] |= USB_PORT_STAT_LOW_SPEED; | |
139 | break; | |
140 | default: | |
141 | break; | |
142 | } | |
143 | ||
21619792 | 144 | spin_unlock_irqrestore(&the_controller->lock, flags); |
04679b34 TH |
145 | |
146 | usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); | |
147 | } | |
148 | ||
20960fac | 149 | static void rh_port_disconnect(int rhport) |
04679b34 | 150 | { |
21619792 AG |
151 | unsigned long flags; |
152 | ||
b8868e45 | 153 | usbip_dbg_vhci_rh("rh_port_disconnect %d\n", rhport); |
04679b34 | 154 | |
21619792 | 155 | spin_lock_irqsave(&the_controller->lock, flags); |
c7f00899 | 156 | |
04679b34 TH |
157 | the_controller->port_status[rhport] &= ~USB_PORT_STAT_CONNECTION; |
158 | the_controller->port_status[rhport] |= | |
159 | (1 << USB_PORT_FEAT_C_CONNECTION); | |
160 | ||
21619792 | 161 | spin_unlock_irqrestore(&the_controller->lock, flags); |
0c9a32f0 | 162 | usb_hcd_poll_rh_status(vhci_to_hcd(the_controller)); |
04679b34 TH |
163 | } |
164 | ||
071d1d47 | 165 | #define PORT_C_MASK \ |
166 | ((USB_PORT_STAT_C_CONNECTION \ | |
167 | | USB_PORT_STAT_C_ENABLE \ | |
168 | | USB_PORT_STAT_C_SUSPEND \ | |
169 | | USB_PORT_STAT_C_OVERCURRENT \ | |
04679b34 TH |
170 | | USB_PORT_STAT_C_RESET) << 16) |
171 | ||
172 | /* | |
7489301a BW |
173 | * Returns 0 if the status hasn't changed, or the number of bytes in buf. |
174 | * Ports are 0-indexed from the HCD point of view, | |
175 | * and 1-indexed from the USB core pointer of view. | |
04679b34 TH |
176 | * |
177 | * @buf: a bitmap to show which port status has been changed. | |
7489301a | 178 | * bit 0: reserved |
04679b34 TH |
179 | * bit 1: the status of port 0 has been changed. |
180 | * bit 2: the status of port 1 has been changed. | |
181 | * ... | |
04679b34 TH |
182 | */ |
183 | static int vhci_hub_status(struct usb_hcd *hcd, char *buf) | |
184 | { | |
185 | struct vhci_hcd *vhci; | |
7489301a | 186 | int retval; |
04679b34 TH |
187 | int rhport; |
188 | int changed = 0; | |
21619792 | 189 | unsigned long flags; |
04679b34 | 190 | |
7489301a BW |
191 | retval = DIV_ROUND_UP(VHCI_NPORTS + 1, 8); |
192 | memset(buf, 0, retval); | |
04679b34 TH |
193 | |
194 | vhci = hcd_to_vhci(hcd); | |
195 | ||
21619792 | 196 | spin_lock_irqsave(&vhci->lock, flags); |
541c7d43 | 197 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
7489301a | 198 | usbip_dbg_vhci_rh("hw accessible flag not on?\n"); |
04679b34 TH |
199 | goto done; |
200 | } | |
201 | ||
202 | /* check pseudo status register for each port */ | |
203 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { | |
204 | if ((vhci->port_status[rhport] & PORT_C_MASK)) { | |
205 | /* The status of a port has been changed, */ | |
7489301a | 206 | usbip_dbg_vhci_rh("port %d status changed\n", rhport); |
04679b34 | 207 | |
7489301a | 208 | buf[(rhport + 1) / 8] |= 1 << (rhport + 1) % 8; |
04679b34 TH |
209 | changed = 1; |
210 | } | |
211 | } | |
212 | ||
107f04bb | 213 | if ((hcd->state == HC_STATE_SUSPENDED) && (changed == 1)) |
04679b34 TH |
214 | usb_hcd_resume_root_hub(hcd); |
215 | ||
04679b34 | 216 | done: |
21619792 | 217 | spin_unlock_irqrestore(&vhci->lock, flags); |
7489301a | 218 | return changed ? retval : 0; |
04679b34 TH |
219 | } |
220 | ||
04679b34 TH |
221 | static inline void hub_descriptor(struct usb_hub_descriptor *desc) |
222 | { | |
223 | memset(desc, 0, sizeof(*desc)); | |
8f413d80 | 224 | desc->bDescriptorType = USB_DT_HUB; |
04679b34 | 225 | desc->bDescLength = 9; |
0c596336 | 226 | desc->wHubCharacteristics = cpu_to_le16( |
1cc9af87 | 227 | HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_COMMON_OCPM); |
04679b34 | 228 | desc->bNbrPorts = VHCI_NPORTS; |
dbe79bbe JY |
229 | desc->u.hs.DeviceRemovable[0] = 0xff; |
230 | desc->u.hs.DeviceRemovable[1] = 0xff; | |
04679b34 TH |
231 | } |
232 | ||
233 | static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
234 | u16 wIndex, char *buf, u16 wLength) | |
235 | { | |
236 | struct vhci_hcd *dum; | |
237 | int retval = 0; | |
04679b34 | 238 | int rhport; |
21619792 | 239 | unsigned long flags; |
04679b34 TH |
240 | |
241 | u32 prev_port_status[VHCI_NPORTS]; | |
242 | ||
541c7d43 | 243 | if (!HCD_HW_ACCESSIBLE(hcd)) |
04679b34 TH |
244 | return -ETIMEDOUT; |
245 | ||
246 | /* | |
247 | * NOTE: | |
248 | * wIndex shows the port number and begins from 1. | |
249 | */ | |
b8868e45 | 250 | usbip_dbg_vhci_rh("typeReq %x wValue %x wIndex %x\n", typeReq, wValue, |
071d1d47 | 251 | wIndex); |
04679b34 | 252 | if (wIndex > VHCI_NPORTS) |
1a4b6f66 | 253 | pr_err("invalid port number %d\n", wIndex); |
04679b34 TH |
254 | rhport = ((__u8)(wIndex & 0x00ff)) - 1; |
255 | ||
256 | dum = hcd_to_vhci(hcd); | |
257 | ||
21619792 | 258 | spin_lock_irqsave(&dum->lock, flags); |
04679b34 TH |
259 | |
260 | /* store old status and compare now and old later */ | |
b8868e45 | 261 | if (usbip_dbg_flag_vhci_rh) { |
6f480bf9 MN |
262 | memcpy(prev_port_status, dum->port_status, |
263 | sizeof(prev_port_status)); | |
04679b34 TH |
264 | } |
265 | ||
266 | switch (typeReq) { | |
267 | case ClearHubFeature: | |
b8868e45 | 268 | usbip_dbg_vhci_rh(" ClearHubFeature\n"); |
04679b34 TH |
269 | break; |
270 | case ClearPortFeature: | |
271 | switch (wValue) { | |
272 | case USB_PORT_FEAT_SUSPEND: | |
273 | if (dum->port_status[rhport] & USB_PORT_STAT_SUSPEND) { | |
274 | /* 20msec signaling */ | |
275 | dum->resuming = 1; | |
276 | dum->re_timeout = | |
277 | jiffies + msecs_to_jiffies(20); | |
278 | } | |
279 | break; | |
280 | case USB_PORT_FEAT_POWER: | |
7923a655 CC |
281 | usbip_dbg_vhci_rh( |
282 | " ClearPortFeature: USB_PORT_FEAT_POWER\n"); | |
04679b34 | 283 | dum->port_status[rhport] = 0; |
04679b34 TH |
284 | dum->resuming = 0; |
285 | break; | |
286 | case USB_PORT_FEAT_C_RESET: | |
7923a655 CC |
287 | usbip_dbg_vhci_rh( |
288 | " ClearPortFeature: USB_PORT_FEAT_C_RESET\n"); | |
04679b34 TH |
289 | switch (dum->vdev[rhport].speed) { |
290 | case USB_SPEED_HIGH: | |
291 | dum->port_status[rhport] |= | |
071d1d47 | 292 | USB_PORT_STAT_HIGH_SPEED; |
04679b34 TH |
293 | break; |
294 | case USB_SPEED_LOW: | |
295 | dum->port_status[rhport] |= | |
071d1d47 | 296 | USB_PORT_STAT_LOW_SPEED; |
04679b34 TH |
297 | break; |
298 | default: | |
299 | break; | |
300 | } | |
301 | default: | |
b8868e45 | 302 | usbip_dbg_vhci_rh(" ClearPortFeature: default %x\n", |
071d1d47 | 303 | wValue); |
04679b34 | 304 | dum->port_status[rhport] &= ~(1 << wValue); |
49aecefc | 305 | break; |
04679b34 TH |
306 | } |
307 | break; | |
308 | case GetHubDescriptor: | |
b8868e45 | 309 | usbip_dbg_vhci_rh(" GetHubDescriptor\n"); |
04679b34 TH |
310 | hub_descriptor((struct usb_hub_descriptor *) buf); |
311 | break; | |
312 | case GetHubStatus: | |
b8868e45 | 313 | usbip_dbg_vhci_rh(" GetHubStatus\n"); |
a06a24d2 | 314 | *(__le32 *) buf = cpu_to_le32(0); |
04679b34 TH |
315 | break; |
316 | case GetPortStatus: | |
b8868e45 | 317 | usbip_dbg_vhci_rh(" GetPortStatus port %x\n", wIndex); |
04679b34 | 318 | if (wIndex > VHCI_NPORTS || wIndex < 1) { |
1a4b6f66 | 319 | pr_err("invalid port number %d\n", wIndex); |
04679b34 TH |
320 | retval = -EPIPE; |
321 | } | |
322 | ||
c7f00899 | 323 | /* we do not care about resume. */ |
04679b34 TH |
324 | |
325 | /* whoever resets or resumes must GetPortStatus to | |
326 | * complete it!! | |
c7f00899 | 327 | */ |
04679b34 | 328 | if (dum->resuming && time_after(jiffies, dum->re_timeout)) { |
04679b34 | 329 | dum->port_status[rhport] |= |
87352760 | 330 | (1 << USB_PORT_FEAT_C_SUSPEND); |
04679b34 | 331 | dum->port_status[rhport] &= |
87352760 | 332 | ~(1 << USB_PORT_FEAT_SUSPEND); |
04679b34 TH |
333 | dum->resuming = 0; |
334 | dum->re_timeout = 0; | |
04679b34 TH |
335 | } |
336 | ||
337 | if ((dum->port_status[rhport] & (1 << USB_PORT_FEAT_RESET)) != | |
071d1d47 | 338 | 0 && time_after(jiffies, dum->re_timeout)) { |
04679b34 | 339 | dum->port_status[rhport] |= |
071d1d47 | 340 | (1 << USB_PORT_FEAT_C_RESET); |
04679b34 | 341 | dum->port_status[rhport] &= |
071d1d47 | 342 | ~(1 << USB_PORT_FEAT_RESET); |
04679b34 TH |
343 | dum->re_timeout = 0; |
344 | ||
345 | if (dum->vdev[rhport].ud.status == | |
071d1d47 | 346 | VDEV_ST_NOTASSIGNED) { |
7923a655 CC |
347 | usbip_dbg_vhci_rh( |
348 | " enable rhport %d (status %u)\n", | |
349 | rhport, | |
350 | dum->vdev[rhport].ud.status); | |
04679b34 | 351 | dum->port_status[rhport] |= |
071d1d47 | 352 | USB_PORT_STAT_ENABLE; |
04679b34 | 353 | } |
04679b34 | 354 | } |
d0306a51 | 355 | ((__le16 *) buf)[0] = cpu_to_le16(dum->port_status[rhport]); |
7923a655 CC |
356 | ((__le16 *) buf)[1] = |
357 | cpu_to_le16(dum->port_status[rhport] >> 16); | |
04679b34 | 358 | |
b8868e45 | 359 | usbip_dbg_vhci_rh(" GetPortStatus bye %x %x\n", ((u16 *)buf)[0], |
071d1d47 | 360 | ((u16 *)buf)[1]); |
04679b34 TH |
361 | break; |
362 | case SetHubFeature: | |
b8868e45 | 363 | usbip_dbg_vhci_rh(" SetHubFeature\n"); |
04679b34 TH |
364 | retval = -EPIPE; |
365 | break; | |
366 | case SetPortFeature: | |
367 | switch (wValue) { | |
368 | case USB_PORT_FEAT_SUSPEND: | |
7923a655 CC |
369 | usbip_dbg_vhci_rh( |
370 | " SetPortFeature: USB_PORT_FEAT_SUSPEND\n"); | |
04679b34 TH |
371 | break; |
372 | case USB_PORT_FEAT_RESET: | |
7923a655 CC |
373 | usbip_dbg_vhci_rh( |
374 | " SetPortFeature: USB_PORT_FEAT_RESET\n"); | |
04679b34 TH |
375 | /* if it's already running, disconnect first */ |
376 | if (dum->port_status[rhport] & USB_PORT_STAT_ENABLE) { | |
377 | dum->port_status[rhport] &= | |
071d1d47 | 378 | ~(USB_PORT_STAT_ENABLE | |
379 | USB_PORT_STAT_LOW_SPEED | | |
380 | USB_PORT_STAT_HIGH_SPEED); | |
04679b34 TH |
381 | /* FIXME test that code path! */ |
382 | } | |
383 | /* 50msec reset signaling */ | |
384 | dum->re_timeout = jiffies + msecs_to_jiffies(50); | |
385 | ||
386 | /* FALLTHROUGH */ | |
387 | default: | |
b8868e45 | 388 | usbip_dbg_vhci_rh(" SetPortFeature: default %d\n", |
071d1d47 | 389 | wValue); |
04679b34 | 390 | dum->port_status[rhport] |= (1 << wValue); |
49aecefc | 391 | break; |
04679b34 TH |
392 | } |
393 | break; | |
394 | ||
395 | default: | |
1a4b6f66 | 396 | pr_err("default: no such request\n"); |
04679b34 TH |
397 | |
398 | /* "protocol stall" on error */ | |
399 | retval = -EPIPE; | |
400 | } | |
401 | ||
b8868e45 | 402 | if (usbip_dbg_flag_vhci_rh) { |
1a4b6f66 | 403 | pr_debug("port %d\n", rhport); |
bfb4ce20 MN |
404 | /* Only dump valid port status */ |
405 | if (rhport >= 0) { | |
4a3ca2be MN |
406 | dump_port_status_diff(prev_port_status[rhport], |
407 | dum->port_status[rhport]); | |
bfb4ce20 | 408 | } |
04679b34 | 409 | } |
b8868e45 | 410 | usbip_dbg_vhci_rh(" bye\n"); |
04679b34 | 411 | |
21619792 | 412 | spin_unlock_irqrestore(&dum->lock, flags); |
04679b34 TH |
413 | |
414 | return retval; | |
415 | } | |
416 | ||
04679b34 TH |
417 | static struct vhci_device *get_vdev(struct usb_device *udev) |
418 | { | |
419 | int i; | |
420 | ||
421 | if (!udev) | |
422 | return NULL; | |
423 | ||
424 | for (i = 0; i < VHCI_NPORTS; i++) | |
425 | if (the_controller->vdev[i].udev == udev) | |
426 | return port_to_vdev(i); | |
427 | ||
428 | return NULL; | |
429 | } | |
430 | ||
431 | static void vhci_tx_urb(struct urb *urb) | |
432 | { | |
433 | struct vhci_device *vdev = get_vdev(urb->dev); | |
434 | struct vhci_priv *priv; | |
21619792 | 435 | unsigned long flags; |
04679b34 TH |
436 | |
437 | if (!vdev) { | |
1a4b6f66 | 438 | pr_err("could not get virtual device"); |
04679b34 TH |
439 | return; |
440 | } | |
441 | ||
b8868e45 | 442 | priv = kzalloc(sizeof(struct vhci_priv), GFP_ATOMIC); |
04679b34 | 443 | if (!priv) { |
04679b34 TH |
444 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
445 | return; | |
446 | } | |
447 | ||
21619792 | 448 | spin_lock_irqsave(&vdev->priv_lock, flags); |
78110bb8 | 449 | |
04679b34 TH |
450 | priv->seqnum = atomic_inc_return(&the_controller->seqnum); |
451 | if (priv->seqnum == 0xffff) | |
1a4b6f66 | 452 | dev_info(&urb->dev->dev, "seqnum max\n"); |
04679b34 TH |
453 | |
454 | priv->vdev = vdev; | |
455 | priv->urb = urb; | |
456 | ||
457 | urb->hcpriv = (void *) priv; | |
458 | ||
04679b34 TH |
459 | list_add_tail(&priv->list, &vdev->priv_tx); |
460 | ||
461 | wake_up(&vdev->waitq_tx); | |
21619792 | 462 | spin_unlock_irqrestore(&vdev->priv_lock, flags); |
04679b34 TH |
463 | } |
464 | ||
465 | static int vhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, | |
466 | gfp_t mem_flags) | |
467 | { | |
468 | struct device *dev = &urb->dev->dev; | |
469 | int ret = 0; | |
6d212153 | 470 | struct vhci_device *vdev; |
21619792 | 471 | unsigned long flags; |
04679b34 | 472 | |
b8868e45 | 473 | usbip_dbg_vhci_hc("enter, usb_hcd %p urb %p mem_flags %d\n", |
071d1d47 | 474 | hcd, urb, mem_flags); |
04679b34 TH |
475 | |
476 | /* patch to usb_sg_init() is in 2.5.60 */ | |
477 | BUG_ON(!urb->transfer_buffer && urb->transfer_buffer_length); | |
478 | ||
21619792 | 479 | spin_lock_irqsave(&the_controller->lock, flags); |
04679b34 | 480 | |
04679b34 TH |
481 | if (urb->status != -EINPROGRESS) { |
482 | dev_err(dev, "URB already unlinked!, status %d\n", urb->status); | |
21619792 | 483 | spin_unlock_irqrestore(&the_controller->lock, flags); |
04679b34 TH |
484 | return urb->status; |
485 | } | |
486 | ||
01446ef5 | 487 | vdev = port_to_vdev(urb->dev->portnum-1); |
6d212153 MV |
488 | |
489 | /* refuse enqueue for dead connection */ | |
490 | spin_lock(&vdev->ud.lock); | |
071d1d47 | 491 | if (vdev->ud.status == VDEV_ST_NULL || |
492 | vdev->ud.status == VDEV_ST_ERROR) { | |
1a4b6f66 | 493 | dev_err(dev, "enqueue for inactive port %d\n", vdev->rhport); |
6d212153 | 494 | spin_unlock(&vdev->ud.lock); |
21619792 | 495 | spin_unlock_irqrestore(&the_controller->lock, flags); |
6d212153 MV |
496 | return -ENODEV; |
497 | } | |
498 | spin_unlock(&vdev->ud.lock); | |
499 | ||
04679b34 TH |
500 | ret = usb_hcd_link_urb_to_ep(hcd, urb); |
501 | if (ret) | |
502 | goto no_need_unlink; | |
503 | ||
504 | /* | |
b8868e45 | 505 | * The enumeration process is as follows; |
04679b34 TH |
506 | * |
507 | * 1. Get_Descriptor request to DevAddrs(0) EndPoint(0) | |
508 | * to get max packet length of default pipe | |
509 | * | |
510 | * 2. Set_Address request to DevAddr(0) EndPoint(0) | |
511 | * | |
512 | */ | |
04679b34 TH |
513 | if (usb_pipedevice(urb->pipe) == 0) { |
514 | __u8 type = usb_pipetype(urb->pipe); | |
515 | struct usb_ctrlrequest *ctrlreq = | |
071d1d47 | 516 | (struct usb_ctrlrequest *) urb->setup_packet; |
04679b34 TH |
517 | |
518 | if (type != PIPE_CONTROL || !ctrlreq) { | |
519 | dev_err(dev, "invalid request to devnum 0\n"); | |
a7cd5829 | 520 | ret = -EINVAL; |
04679b34 TH |
521 | goto no_need_xmit; |
522 | } | |
523 | ||
524 | switch (ctrlreq->bRequest) { | |
525 | case USB_REQ_SET_ADDRESS: | |
526 | /* set_address may come when a device is reset */ | |
527 | dev_info(dev, "SetAddress Request (%d) to port %d\n", | |
528 | ctrlreq->wValue, vdev->rhport); | |
529 | ||
03f3df81 | 530 | usb_put_dev(vdev->udev); |
7606ee8a | 531 | vdev->udev = usb_get_dev(urb->dev); |
04679b34 TH |
532 | |
533 | spin_lock(&vdev->ud.lock); | |
534 | vdev->ud.status = VDEV_ST_USED; | |
535 | spin_unlock(&vdev->ud.lock); | |
536 | ||
537 | if (urb->status == -EINPROGRESS) { | |
538 | /* This request is successfully completed. */ | |
539 | /* If not -EINPROGRESS, possibly unlinked. */ | |
540 | urb->status = 0; | |
541 | } | |
542 | ||
543 | goto no_need_xmit; | |
544 | ||
545 | case USB_REQ_GET_DESCRIPTOR: | |
d0306a51 | 546 | if (ctrlreq->wValue == cpu_to_le16(USB_DT_DEVICE << 8)) |
7923a655 CC |
547 | usbip_dbg_vhci_hc( |
548 | "Not yet?:Get_Descriptor to device 0 (get max pipe size)\n"); | |
04679b34 | 549 | |
03f3df81 | 550 | usb_put_dev(vdev->udev); |
7606ee8a | 551 | vdev->udev = usb_get_dev(urb->dev); |
04679b34 TH |
552 | goto out; |
553 | ||
554 | default: | |
555 | /* NOT REACHED */ | |
7923a655 CC |
556 | dev_err(dev, |
557 | "invalid request to devnum 0 bRequest %u, wValue %u\n", | |
558 | ctrlreq->bRequest, | |
04679b34 TH |
559 | ctrlreq->wValue); |
560 | ret = -EINVAL; | |
561 | goto no_need_xmit; | |
562 | } | |
563 | ||
564 | } | |
565 | ||
566 | out: | |
567 | vhci_tx_urb(urb); | |
21619792 | 568 | spin_unlock_irqrestore(&the_controller->lock, flags); |
04679b34 TH |
569 | |
570 | return 0; | |
571 | ||
572 | no_need_xmit: | |
573 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
574 | no_need_unlink: | |
21619792 | 575 | spin_unlock_irqrestore(&the_controller->lock, flags); |
03b0a528 IK |
576 | if (!ret) |
577 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), | |
578 | urb, urb->status); | |
a7cd5829 | 579 | return ret; |
04679b34 TH |
580 | } |
581 | ||
582 | /* | |
583 | * vhci_rx gives back the urb after receiving the reply of the urb. If an | |
584 | * unlink pdu is sent or not, vhci_rx receives a normal return pdu and gives | |
585 | * back its urb. For the driver unlinking the urb, the content of the urb is | |
586 | * not important, but the calling to its completion handler is important; the | |
587 | * completion of unlinking is notified by the completion handler. | |
588 | * | |
589 | * | |
590 | * CLIENT SIDE | |
591 | * | |
592 | * - When vhci_hcd receives RET_SUBMIT, | |
593 | * | |
594 | * - case 1a). the urb of the pdu is not unlinking. | |
595 | * - normal case | |
596 | * => just give back the urb | |
597 | * | |
598 | * - case 1b). the urb of the pdu is unlinking. | |
599 | * - usbip.ko will return a reply of the unlinking request. | |
600 | * => give back the urb now and go to case 2b). | |
601 | * | |
602 | * - When vhci_hcd receives RET_UNLINK, | |
603 | * | |
604 | * - case 2a). a submit request is still pending in vhci_hcd. | |
605 | * - urb was really pending in usbip.ko and urb_unlink_urb() was | |
606 | * completed there. | |
607 | * => free a pending submit request | |
608 | * => notify unlink completeness by giving back the urb | |
609 | * | |
610 | * - case 2b). a submit request is *not* pending in vhci_hcd. | |
611 | * - urb was already given back to the core driver. | |
612 | * => do not give back the urb | |
613 | * | |
614 | * | |
615 | * SERVER SIDE | |
616 | * | |
617 | * - When usbip receives CMD_UNLINK, | |
618 | * | |
619 | * - case 3a). the urb of the unlink request is now in submission. | |
620 | * => do usb_unlink_urb(). | |
621 | * => after the unlink is completed, send RET_UNLINK. | |
622 | * | |
623 | * - case 3b). the urb of the unlink request is not in submission. | |
624 | * - may be already completed or never be received | |
625 | * => send RET_UNLINK | |
626 | * | |
627 | */ | |
628 | static int vhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) | |
629 | { | |
04679b34 TH |
630 | struct vhci_priv *priv; |
631 | struct vhci_device *vdev; | |
21619792 | 632 | unsigned long flags; |
04679b34 | 633 | |
1a4b6f66 | 634 | pr_info("dequeue a urb %p\n", urb); |
04679b34 | 635 | |
21619792 | 636 | spin_lock_irqsave(&the_controller->lock, flags); |
04679b34 TH |
637 | |
638 | priv = urb->hcpriv; | |
639 | if (!priv) { | |
640 | /* URB was never linked! or will be soon given back by | |
641 | * vhci_rx. */ | |
21619792 | 642 | spin_unlock_irqrestore(&the_controller->lock, flags); |
635e664a | 643 | return -EIDRM; |
04679b34 TH |
644 | } |
645 | ||
646 | { | |
647 | int ret = 0; | |
3eed8c03 | 648 | |
04679b34 TH |
649 | ret = usb_hcd_check_unlink_urb(hcd, urb, status); |
650 | if (ret) { | |
21619792 | 651 | spin_unlock_irqrestore(&the_controller->lock, flags); |
b8868e45 | 652 | return ret; |
04679b34 TH |
653 | } |
654 | } | |
655 | ||
656 | /* send unlink request here? */ | |
657 | vdev = priv->vdev; | |
658 | ||
659 | if (!vdev->ud.tcp_socket) { | |
660 | /* tcp connection is closed */ | |
50b66b5c | 661 | spin_lock(&vdev->priv_lock); |
04679b34 | 662 | |
1a4b6f66 | 663 | pr_info("device %p seems to be disconnected\n", vdev); |
04679b34 TH |
664 | list_del(&priv->list); |
665 | kfree(priv); | |
666 | urb->hcpriv = NULL; | |
667 | ||
50b66b5c | 668 | spin_unlock(&vdev->priv_lock); |
04679b34 | 669 | |
b8868e45 BM |
670 | /* |
671 | * If tcp connection is alive, we have sent CMD_UNLINK. | |
672 | * vhci_rx will receive RET_UNLINK and give back the URB. | |
673 | * Otherwise, we give back it here. | |
674 | */ | |
1a4b6f66 | 675 | pr_info("gives back urb %p\n", urb); |
b8868e45 BM |
676 | |
677 | usb_hcd_unlink_urb_from_ep(hcd, urb); | |
678 | ||
21619792 | 679 | spin_unlock_irqrestore(&the_controller->lock, flags); |
b8868e45 | 680 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
071d1d47 | 681 | urb->status); |
21619792 | 682 | spin_lock_irqsave(&the_controller->lock, flags); |
b8868e45 | 683 | |
04679b34 TH |
684 | } else { |
685 | /* tcp connection is alive */ | |
04679b34 TH |
686 | struct vhci_unlink *unlink; |
687 | ||
50b66b5c | 688 | spin_lock(&vdev->priv_lock); |
04679b34 TH |
689 | |
690 | /* setup CMD_UNLINK pdu */ | |
691 | unlink = kzalloc(sizeof(struct vhci_unlink), GFP_ATOMIC); | |
692 | if (!unlink) { | |
50b66b5c | 693 | spin_unlock(&vdev->priv_lock); |
21619792 | 694 | spin_unlock_irqrestore(&the_controller->lock, flags); |
04679b34 TH |
695 | usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_MALLOC); |
696 | return -ENOMEM; | |
697 | } | |
698 | ||
699 | unlink->seqnum = atomic_inc_return(&the_controller->seqnum); | |
700 | if (unlink->seqnum == 0xffff) | |
1a4b6f66 | 701 | pr_info("seqnum max\n"); |
04679b34 TH |
702 | |
703 | unlink->unlink_seqnum = priv->seqnum; | |
704 | ||
1a4b6f66 | 705 | pr_info("device %p seems to be still connected\n", vdev); |
04679b34 TH |
706 | |
707 | /* send cmd_unlink and try to cancel the pending URB in the | |
708 | * peer */ | |
709 | list_add_tail(&unlink->list, &vdev->unlink_tx); | |
710 | wake_up(&vdev->waitq_tx); | |
711 | ||
50b66b5c | 712 | spin_unlock(&vdev->priv_lock); |
04679b34 TH |
713 | } |
714 | ||
21619792 | 715 | spin_unlock_irqrestore(&the_controller->lock, flags); |
04679b34 | 716 | |
b8868e45 | 717 | usbip_dbg_vhci_hc("leave\n"); |
04679b34 TH |
718 | return 0; |
719 | } | |
720 | ||
04679b34 TH |
721 | static void vhci_device_unlink_cleanup(struct vhci_device *vdev) |
722 | { | |
723 | struct vhci_unlink *unlink, *tmp; | |
21619792 | 724 | unsigned long flags; |
04679b34 | 725 | |
21619792 | 726 | spin_lock_irqsave(&the_controller->lock, flags); |
04679b34 TH |
727 | spin_lock(&vdev->priv_lock); |
728 | ||
729 | list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) { | |
1a4b6f66 | 730 | pr_info("unlink cleanup tx %lu\n", unlink->unlink_seqnum); |
04679b34 TH |
731 | list_del(&unlink->list); |
732 | kfree(unlink); | |
733 | } | |
734 | ||
236742de | 735 | while (!list_empty(&vdev->unlink_rx)) { |
b92a5e23 MV |
736 | struct urb *urb; |
737 | ||
236742de BB |
738 | unlink = list_first_entry(&vdev->unlink_rx, struct vhci_unlink, |
739 | list); | |
740 | ||
b92a5e23 | 741 | /* give back URB of unanswered unlink request */ |
1a4b6f66 | 742 | pr_info("unlink cleanup rx %lu\n", unlink->unlink_seqnum); |
b92a5e23 MV |
743 | |
744 | urb = pickup_urb_and_free_priv(vdev, unlink->unlink_seqnum); | |
745 | if (!urb) { | |
1a4b6f66 | 746 | pr_info("the urb (seqnum %lu) was already given back\n", |
747 | unlink->unlink_seqnum); | |
b92a5e23 MV |
748 | list_del(&unlink->list); |
749 | kfree(unlink); | |
750 | continue; | |
751 | } | |
752 | ||
753 | urb->status = -ENODEV; | |
754 | ||
b92a5e23 | 755 | usb_hcd_unlink_urb_from_ep(vhci_to_hcd(the_controller), urb); |
236742de BB |
756 | |
757 | list_del(&unlink->list); | |
758 | ||
759 | spin_unlock(&vdev->priv_lock); | |
21619792 | 760 | spin_unlock_irqrestore(&the_controller->lock, flags); |
b92a5e23 | 761 | |
071d1d47 | 762 | usb_hcd_giveback_urb(vhci_to_hcd(the_controller), urb, |
763 | urb->status); | |
b92a5e23 | 764 | |
21619792 | 765 | spin_lock_irqsave(&the_controller->lock, flags); |
236742de BB |
766 | spin_lock(&vdev->priv_lock); |
767 | ||
04679b34 TH |
768 | kfree(unlink); |
769 | } | |
770 | ||
771 | spin_unlock(&vdev->priv_lock); | |
21619792 | 772 | spin_unlock_irqrestore(&the_controller->lock, flags); |
04679b34 TH |
773 | } |
774 | ||
775 | /* | |
776 | * The important thing is that only one context begins cleanup. | |
777 | * This is why error handling and cleanup become simple. | |
778 | * We do not want to consider race condition as possible. | |
779 | */ | |
780 | static void vhci_shutdown_connection(struct usbip_device *ud) | |
781 | { | |
782 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
783 | ||
784 | /* need this? see stub_dev.c */ | |
785 | if (ud->tcp_socket) { | |
1a4b6f66 | 786 | pr_debug("shutdown tcp_socket %p\n", ud->tcp_socket); |
04679b34 TH |
787 | kernel_sock_shutdown(ud->tcp_socket, SHUT_RDWR); |
788 | } | |
789 | ||
c7f00899 | 790 | /* kill threads related to this sdev */ |
cbf7d122 | 791 | if (vdev->ud.tcp_rx) { |
ba46ce30 | 792 | kthread_stop_put(vdev->ud.tcp_rx); |
cbf7d122 | 793 | vdev->ud.tcp_rx = NULL; |
794 | } | |
795 | if (vdev->ud.tcp_tx) { | |
ba46ce30 | 796 | kthread_stop_put(vdev->ud.tcp_tx); |
cbf7d122 | 797 | vdev->ud.tcp_tx = NULL; |
798 | } | |
1a4b6f66 | 799 | pr_info("stop threads\n"); |
04679b34 TH |
800 | |
801 | /* active connection is closed */ | |
3d0a2a22 | 802 | if (vdev->ud.tcp_socket) { |
964ea96e | 803 | sockfd_put(vdev->ud.tcp_socket); |
04679b34 TH |
804 | vdev->ud.tcp_socket = NULL; |
805 | } | |
1a4b6f66 | 806 | pr_info("release socket\n"); |
04679b34 TH |
807 | |
808 | vhci_device_unlink_cleanup(vdev); | |
809 | ||
810 | /* | |
811 | * rh_port_disconnect() is a trigger of ... | |
812 | * usb_disable_device(): | |
813 | * disable all the endpoints for a USB device. | |
814 | * usb_disable_endpoint(): | |
815 | * disable endpoints. pending urbs are unlinked(dequeued). | |
816 | * | |
817 | * NOTE: After calling rh_port_disconnect(), the USB device drivers of a | |
4ec2601f | 818 | * detached device should release used urbs in a cleanup function (i.e. |
04679b34 TH |
819 | * xxx_disconnect()). Therefore, vhci_hcd does not need to release |
820 | * pushed urbs and their private data in this function. | |
821 | * | |
4ec2601f | 822 | * NOTE: vhci_dequeue() must be considered carefully. When shutting down |
04679b34 TH |
823 | * a connection, vhci_shutdown_connection() expects vhci_dequeue() |
824 | * gives back pushed urbs and frees their private data by request of | |
825 | * the cleanup function of a USB driver. When unlinking a urb with an | |
826 | * active connection, vhci_dequeue() does not give back the urb which | |
827 | * is actually given back by vhci_rx after receiving its return pdu. | |
828 | * | |
829 | */ | |
830 | rh_port_disconnect(vdev->rhport); | |
831 | ||
1a4b6f66 | 832 | pr_info("disconnect device\n"); |
04679b34 TH |
833 | } |
834 | ||
835 | ||
836 | static void vhci_device_reset(struct usbip_device *ud) | |
837 | { | |
838 | struct vhci_device *vdev = container_of(ud, struct vhci_device, ud); | |
21619792 | 839 | unsigned long flags; |
04679b34 | 840 | |
21619792 | 841 | spin_lock_irqsave(&ud->lock, flags); |
04679b34 TH |
842 | |
843 | vdev->speed = 0; | |
844 | vdev->devid = 0; | |
845 | ||
03f3df81 | 846 | usb_put_dev(vdev->udev); |
7606ee8a MV |
847 | vdev->udev = NULL; |
848 | ||
3d0a2a22 | 849 | if (ud->tcp_socket) { |
964ea96e | 850 | sockfd_put(ud->tcp_socket); |
3d0a2a22 BB |
851 | ud->tcp_socket = NULL; |
852 | } | |
04679b34 TH |
853 | ud->status = VDEV_ST_NULL; |
854 | ||
21619792 | 855 | spin_unlock_irqrestore(&ud->lock, flags); |
04679b34 TH |
856 | } |
857 | ||
858 | static void vhci_device_unusable(struct usbip_device *ud) | |
859 | { | |
21619792 AG |
860 | unsigned long flags; |
861 | ||
862 | spin_lock_irqsave(&ud->lock, flags); | |
04679b34 | 863 | ud->status = VDEV_ST_ERROR; |
21619792 | 864 | spin_unlock_irqrestore(&ud->lock, flags); |
04679b34 TH |
865 | } |
866 | ||
867 | static void vhci_device_init(struct vhci_device *vdev) | |
868 | { | |
869 | memset(vdev, 0, sizeof(*vdev)); | |
870 | ||
04679b34 TH |
871 | vdev->ud.side = USBIP_VHCI; |
872 | vdev->ud.status = VDEV_ST_NULL; | |
04679b34 TH |
873 | spin_lock_init(&vdev->ud.lock); |
874 | ||
875 | INIT_LIST_HEAD(&vdev->priv_rx); | |
876 | INIT_LIST_HEAD(&vdev->priv_tx); | |
877 | INIT_LIST_HEAD(&vdev->unlink_tx); | |
878 | INIT_LIST_HEAD(&vdev->unlink_rx); | |
04679b34 TH |
879 | spin_lock_init(&vdev->priv_lock); |
880 | ||
881 | init_waitqueue_head(&vdev->waitq_tx); | |
882 | ||
883 | vdev->ud.eh_ops.shutdown = vhci_shutdown_connection; | |
884 | vdev->ud.eh_ops.reset = vhci_device_reset; | |
885 | vdev->ud.eh_ops.unusable = vhci_device_unusable; | |
886 | ||
887 | usbip_start_eh(&vdev->ud); | |
888 | } | |
889 | ||
04679b34 TH |
890 | static int vhci_start(struct usb_hcd *hcd) |
891 | { | |
892 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
893 | int rhport; | |
894 | int err = 0; | |
895 | ||
b8868e45 | 896 | usbip_dbg_vhci_hc("enter vhci_start\n"); |
04679b34 | 897 | |
04679b34 TH |
898 | /* initialize private data of usb_hcd */ |
899 | ||
900 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { | |
901 | struct vhci_device *vdev = &vhci->vdev[rhport]; | |
3eed8c03 | 902 | |
04679b34 TH |
903 | vhci_device_init(vdev); |
904 | vdev->rhport = rhport; | |
905 | } | |
906 | ||
907 | atomic_set(&vhci->seqnum, 0); | |
908 | spin_lock_init(&vhci->lock); | |
909 | ||
04679b34 | 910 | hcd->power_budget = 0; /* no limit */ |
04679b34 TH |
911 | hcd->uses_new_polling = 1; |
912 | ||
04679b34 TH |
913 | /* vhci_hcd is now ready to be controlled through sysfs */ |
914 | err = sysfs_create_group(&vhci_dev(vhci)->kobj, &dev_attr_group); | |
915 | if (err) { | |
1a4b6f66 | 916 | pr_err("create sysfs files\n"); |
04679b34 TH |
917 | return err; |
918 | } | |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
923 | static void vhci_stop(struct usb_hcd *hcd) | |
924 | { | |
925 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
926 | int rhport = 0; | |
927 | ||
b8868e45 | 928 | usbip_dbg_vhci_hc("stop VHCI controller\n"); |
04679b34 | 929 | |
04679b34 TH |
930 | /* 1. remove the userland interface of vhci_hcd */ |
931 | sysfs_remove_group(&vhci_dev(vhci)->kobj, &dev_attr_group); | |
932 | ||
933 | /* 2. shutdown all the ports of vhci_hcd */ | |
909cc6f9 | 934 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) { |
04679b34 TH |
935 | struct vhci_device *vdev = &vhci->vdev[rhport]; |
936 | ||
937 | usbip_event_add(&vdev->ud, VDEV_EVENT_REMOVED); | |
938 | usbip_stop_eh(&vdev->ud); | |
939 | } | |
04679b34 TH |
940 | } |
941 | ||
04679b34 TH |
942 | static int vhci_get_frame_number(struct usb_hcd *hcd) |
943 | { | |
083d5ad1 | 944 | dev_err_ratelimited(&hcd->self.root_hub->dev, "Not yet implemented\n"); |
04679b34 TH |
945 | return 0; |
946 | } | |
947 | ||
04679b34 TH |
948 | #ifdef CONFIG_PM |
949 | ||
950 | /* FIXME: suspend/resume */ | |
951 | static int vhci_bus_suspend(struct usb_hcd *hcd) | |
952 | { | |
953 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
21619792 | 954 | unsigned long flags; |
04679b34 TH |
955 | |
956 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); | |
957 | ||
21619792 | 958 | spin_lock_irqsave(&vhci->lock, flags); |
04679b34 | 959 | hcd->state = HC_STATE_SUSPENDED; |
21619792 | 960 | spin_unlock_irqrestore(&vhci->lock, flags); |
04679b34 TH |
961 | |
962 | return 0; | |
963 | } | |
964 | ||
965 | static int vhci_bus_resume(struct usb_hcd *hcd) | |
966 | { | |
967 | struct vhci_hcd *vhci = hcd_to_vhci(hcd); | |
968 | int rc = 0; | |
21619792 | 969 | unsigned long flags; |
04679b34 TH |
970 | |
971 | dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__); | |
972 | ||
21619792 | 973 | spin_lock_irqsave(&vhci->lock, flags); |
c46cb54d | 974 | if (!HCD_HW_ACCESSIBLE(hcd)) |
04679b34 | 975 | rc = -ESHUTDOWN; |
c46cb54d | 976 | else |
04679b34 | 977 | hcd->state = HC_STATE_RUNNING; |
21619792 | 978 | spin_unlock_irqrestore(&vhci->lock, flags); |
04679b34 | 979 | |
87352760 | 980 | return rc; |
04679b34 TH |
981 | } |
982 | ||
983 | #else | |
984 | ||
985 | #define vhci_bus_suspend NULL | |
986 | #define vhci_bus_resume NULL | |
987 | #endif | |
988 | ||
04679b34 TH |
989 | static struct hc_driver vhci_hc_driver = { |
990 | .description = driver_name, | |
991 | .product_desc = driver_desc, | |
992 | .hcd_priv_size = sizeof(struct vhci_hcd), | |
993 | ||
994 | .flags = HCD_USB2, | |
995 | ||
996 | .start = vhci_start, | |
00512687 | 997 | .stop = vhci_stop, |
04679b34 TH |
998 | |
999 | .urb_enqueue = vhci_urb_enqueue, | |
1000 | .urb_dequeue = vhci_urb_dequeue, | |
1001 | ||
1002 | .get_frame_number = vhci_get_frame_number, | |
1003 | ||
1004 | .hub_status_data = vhci_hub_status, | |
1005 | .hub_control = vhci_hub_control, | |
1006 | .bus_suspend = vhci_bus_suspend, | |
1007 | .bus_resume = vhci_bus_resume, | |
1008 | }; | |
1009 | ||
1010 | static int vhci_hcd_probe(struct platform_device *pdev) | |
1011 | { | |
1012 | struct usb_hcd *hcd; | |
1013 | int ret; | |
1014 | ||
b8868e45 | 1015 | usbip_dbg_vhci_hc("name %s id %d\n", pdev->name, pdev->id); |
04679b34 | 1016 | |
04679b34 TH |
1017 | /* |
1018 | * Allocate and initialize hcd. | |
1019 | * Our private data is also allocated automatically. | |
1020 | */ | |
e9133972 | 1021 | hcd = usb_create_hcd(&vhci_hc_driver, &pdev->dev, dev_name(&pdev->dev)); |
04679b34 | 1022 | if (!hcd) { |
1a4b6f66 | 1023 | pr_err("create hcd failed\n"); |
04679b34 TH |
1024 | return -ENOMEM; |
1025 | } | |
cee6a262 | 1026 | hcd->has_tt = 1; |
04679b34 TH |
1027 | |
1028 | /* this is private data for vhci_hcd */ | |
1029 | the_controller = hcd_to_vhci(hcd); | |
1030 | ||
1031 | /* | |
1032 | * Finish generic HCD structure initialization and register. | |
1033 | * Call the driver's reset() and start() routines. | |
1034 | */ | |
1035 | ret = usb_add_hcd(hcd, 0, 0); | |
1036 | if (ret != 0) { | |
1a4b6f66 | 1037 | pr_err("usb_add_hcd failed %d\n", ret); |
04679b34 TH |
1038 | usb_put_hcd(hcd); |
1039 | the_controller = NULL; | |
1040 | return ret; | |
1041 | } | |
1042 | ||
b8868e45 | 1043 | usbip_dbg_vhci_hc("bye\n"); |
04679b34 TH |
1044 | return 0; |
1045 | } | |
1046 | ||
04679b34 TH |
1047 | static int vhci_hcd_remove(struct platform_device *pdev) |
1048 | { | |
1049 | struct usb_hcd *hcd; | |
1050 | ||
1051 | hcd = platform_get_drvdata(pdev); | |
1052 | if (!hcd) | |
1053 | return 0; | |
1054 | ||
1055 | /* | |
1056 | * Disconnects the root hub, | |
1057 | * then reverses the effects of usb_add_hcd(), | |
1058 | * invoking the HCD's stop() methods. | |
1059 | */ | |
1060 | usb_remove_hcd(hcd); | |
1061 | usb_put_hcd(hcd); | |
1062 | the_controller = NULL; | |
1063 | ||
04679b34 TH |
1064 | return 0; |
1065 | } | |
1066 | ||
04679b34 TH |
1067 | #ifdef CONFIG_PM |
1068 | ||
1069 | /* what should happen for USB/IP under suspend/resume? */ | |
1070 | static int vhci_hcd_suspend(struct platform_device *pdev, pm_message_t state) | |
1071 | { | |
1072 | struct usb_hcd *hcd; | |
1073 | int rhport = 0; | |
1074 | int connected = 0; | |
1075 | int ret = 0; | |
21619792 | 1076 | unsigned long flags; |
04679b34 | 1077 | |
04679b34 TH |
1078 | hcd = platform_get_drvdata(pdev); |
1079 | ||
21619792 | 1080 | spin_lock_irqsave(&the_controller->lock, flags); |
04679b34 TH |
1081 | |
1082 | for (rhport = 0; rhport < VHCI_NPORTS; rhport++) | |
1083 | if (the_controller->port_status[rhport] & | |
071d1d47 | 1084 | USB_PORT_STAT_CONNECTION) |
04679b34 TH |
1085 | connected += 1; |
1086 | ||
21619792 | 1087 | spin_unlock_irqrestore(&the_controller->lock, flags); |
04679b34 TH |
1088 | |
1089 | if (connected > 0) { | |
7923a655 CC |
1090 | dev_info(&pdev->dev, |
1091 | "We have %d active connection%s. Do not suspend.\n", | |
1092 | connected, (connected == 1 ? "" : "s")); | |
04679b34 TH |
1093 | ret = -EBUSY; |
1094 | } else { | |
1a4b6f66 | 1095 | dev_info(&pdev->dev, "suspend vhci_hcd"); |
04679b34 TH |
1096 | clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
1097 | } | |
1098 | ||
1099 | return ret; | |
1100 | } | |
1101 | ||
1102 | static int vhci_hcd_resume(struct platform_device *pdev) | |
1103 | { | |
1104 | struct usb_hcd *hcd; | |
1105 | ||
1106 | dev_dbg(&pdev->dev, "%s\n", __func__); | |
1107 | ||
1108 | hcd = platform_get_drvdata(pdev); | |
1109 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); | |
1110 | usb_hcd_poll_rh_status(hcd); | |
1111 | ||
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | #else | |
1116 | ||
1117 | #define vhci_hcd_suspend NULL | |
1118 | #define vhci_hcd_resume NULL | |
1119 | ||
1120 | #endif | |
1121 | ||
04679b34 TH |
1122 | static struct platform_driver vhci_driver = { |
1123 | .probe = vhci_hcd_probe, | |
f307da94 | 1124 | .remove = vhci_hcd_remove, |
04679b34 TH |
1125 | .suspend = vhci_hcd_suspend, |
1126 | .resume = vhci_hcd_resume, | |
1127 | .driver = { | |
1c126bc6 | 1128 | .name = driver_name, |
04679b34 TH |
1129 | }, |
1130 | }; | |
1131 | ||
04679b34 TH |
1132 | /* |
1133 | * The VHCI 'device' is 'virtual'; not a real plug&play hardware. | |
1134 | * We need to add this virtual device as a platform device arbitrarily: | |
1135 | * 1. platform_device_register() | |
1136 | */ | |
1137 | static void the_pdev_release(struct device *dev) | |
1138 | { | |
04679b34 TH |
1139 | } |
1140 | ||
1141 | static struct platform_device the_pdev = { | |
1142 | /* should be the same name as driver_name */ | |
6fafecb9 | 1143 | .name = driver_name, |
04679b34 TH |
1144 | .id = -1, |
1145 | .dev = { | |
04679b34 TH |
1146 | .release = the_pdev_release, |
1147 | }, | |
1148 | }; | |
1149 | ||
0392bbb6 | 1150 | static int __init vhci_hcd_init(void) |
04679b34 TH |
1151 | { |
1152 | int ret; | |
1153 | ||
04679b34 TH |
1154 | if (usb_disabled()) |
1155 | return -ENODEV; | |
1156 | ||
04679b34 | 1157 | ret = platform_driver_register(&vhci_driver); |
4d421950 | 1158 | if (ret) |
04679b34 TH |
1159 | goto err_driver_register; |
1160 | ||
1161 | ret = platform_device_register(&the_pdev); | |
4d421950 | 1162 | if (ret) |
04679b34 TH |
1163 | goto err_platform_device_register; |
1164 | ||
1a4b6f66 | 1165 | pr_info(DRIVER_DESC " v" USBIP_VERSION "\n"); |
04679b34 TH |
1166 | return ret; |
1167 | ||
04679b34 TH |
1168 | err_platform_device_register: |
1169 | platform_driver_unregister(&vhci_driver); | |
04679b34 | 1170 | err_driver_register: |
04679b34 TH |
1171 | return ret; |
1172 | } | |
04679b34 | 1173 | |
0392bbb6 | 1174 | static void __exit vhci_hcd_exit(void) |
04679b34 | 1175 | { |
04679b34 TH |
1176 | platform_device_unregister(&the_pdev); |
1177 | platform_driver_unregister(&vhci_driver); | |
04679b34 | 1178 | } |
071d1d47 | 1179 | |
0392bbb6 | 1180 | module_init(vhci_hcd_init); |
1181 | module_exit(vhci_hcd_exit); | |
071d1d47 | 1182 | |
1183 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1184 | MODULE_DESCRIPTION(DRIVER_DESC); | |
4ce0a41f | 1185 | MODULE_LICENSE("GPL"); |
6973c6f2 | 1186 | MODULE_VERSION(USBIP_VERSION); |